brintos / linux-shallow public Read only

1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>4 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.5 */6 7#include <linux/inetdevice.h>8#include <net/addrconf.h>9#include <linux/syscalls.h>10#include <linux/namei.h>11#include <linux/statfs.h>12#include <linux/ethtool.h>13#include <linux/falloc.h>14#include <linux/mount.h>15#include <linux/filelock.h>16 17#include "glob.h"18#include "smbfsctl.h"19#include "oplock.h"20#include "smbacl.h"21 22#include "auth.h"23#include "asn1.h"24#include "connection.h"25#include "transport_ipc.h"26#include "transport_rdma.h"27#include "vfs.h"28#include "vfs_cache.h"29#include "misc.h"30 31#include "server.h"32#include "smb_common.h"33#include "../common/smb2status.h"34#include "ksmbd_work.h"35#include "mgmt/user_config.h"36#include "mgmt/share_config.h"37#include "mgmt/tree_connect.h"38#include "mgmt/user_session.h"39#include "mgmt/ksmbd_ida.h"40#include "ndr.h"41 42static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)43{44	if (work->next_smb2_rcv_hdr_off) {45		*req = ksmbd_req_buf_next(work);46		*rsp = ksmbd_resp_buf_next(work);47	} else {48		*req = smb2_get_msg(work->request_buf);49		*rsp = smb2_get_msg(work->response_buf);50	}51}52 53#define WORK_BUFFERS(w, rq, rs)	__wbuf((w), (void **)&(rq), (void **)&(rs))54 55/**56 * check_session_id() - check for valid session id in smb header57 * @conn:	connection instance58 * @id:		session id from smb header59 *60 * Return:      1 if valid session id, otherwise 061 */62static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)63{64	struct ksmbd_session *sess;65 66	if (id == 0 || id == -1)67		return false;68 69	sess = ksmbd_session_lookup_all(conn, id);70	if (sess)71		return true;72	pr_err("Invalid user session id: %llu\n", id);73	return false;74}75 76struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)77{78	return xa_load(&sess->ksmbd_chann_list, (long)conn);79}80 81/**82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.83 * @work:	smb work84 *85 * Return:	0 if there is a tree connection matched or these are86 *		skipable commands, otherwise error87 */88int smb2_get_ksmbd_tcon(struct ksmbd_work *work)89{90	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);91	unsigned int cmd = le16_to_cpu(req_hdr->Command);92	unsigned int tree_id;93 94	if (cmd == SMB2_TREE_CONNECT_HE ||95	    cmd ==  SMB2_CANCEL_HE ||96	    cmd ==  SMB2_LOGOFF_HE) {97		ksmbd_debug(SMB, "skip to check tree connect request\n");98		return 0;99	}100 101	if (xa_empty(&work->sess->tree_conns)) {102		ksmbd_debug(SMB, "NO tree connected\n");103		return -ENOENT;104	}105 106	tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);107 108	/*109	 * If request is not the first in Compound request,110	 * Just validate tree id in header with work->tcon->id.111	 */112	if (work->next_smb2_rcv_hdr_off) {113		if (!work->tcon) {114			pr_err("The first operation in the compound does not have tcon\n");115			return -EINVAL;116		}117		if (tree_id != UINT_MAX && work->tcon->id != tree_id) {118			pr_err("tree id(%u) is different with id(%u) in first operation\n",119					tree_id, work->tcon->id);120			return -EINVAL;121		}122		return 1;123	}124 125	work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);126	if (!work->tcon) {127		pr_err("Invalid tid %d\n", tree_id);128		return -ENOENT;129	}130 131	return 1;132}133 134/**135 * smb2_set_err_rsp() - set error response code on smb response136 * @work:	smb work containing response buffer137 */138void smb2_set_err_rsp(struct ksmbd_work *work)139{140	struct smb2_err_rsp *err_rsp;141 142	if (work->next_smb2_rcv_hdr_off)143		err_rsp = ksmbd_resp_buf_next(work);144	else145		err_rsp = smb2_get_msg(work->response_buf);146 147	if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {148		int err;149 150		err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;151		err_rsp->ErrorContextCount = 0;152		err_rsp->Reserved = 0;153		err_rsp->ByteCount = 0;154		err_rsp->ErrorData[0] = 0;155		err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,156					__SMB2_HEADER_STRUCTURE_SIZE +157						SMB2_ERROR_STRUCTURE_SIZE2);158		if (err)159			work->send_no_response = 1;160	}161}162 163/**164 * is_smb2_neg_cmd() - is it smb2 negotiation command165 * @work:	smb work containing smb header166 *167 * Return:      true if smb2 negotiation command, otherwise false168 */169bool is_smb2_neg_cmd(struct ksmbd_work *work)170{171	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);172 173	/* is it SMB2 header ? */174	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)175		return false;176 177	/* make sure it is request not response message */178	if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)179		return false;180 181	if (hdr->Command != SMB2_NEGOTIATE)182		return false;183 184	return true;185}186 187/**188 * is_smb2_rsp() - is it smb2 response189 * @work:	smb work containing smb response buffer190 *191 * Return:      true if smb2 response, otherwise false192 */193bool is_smb2_rsp(struct ksmbd_work *work)194{195	struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);196 197	/* is it SMB2 header ? */198	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)199		return false;200 201	/* make sure it is response not request message */202	if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))203		return false;204 205	return true;206}207 208/**209 * get_smb2_cmd_val() - get smb command code from smb header210 * @work:	smb work containing smb request buffer211 *212 * Return:      smb2 request command value213 */214u16 get_smb2_cmd_val(struct ksmbd_work *work)215{216	struct smb2_hdr *rcv_hdr;217 218	if (work->next_smb2_rcv_hdr_off)219		rcv_hdr = ksmbd_req_buf_next(work);220	else221		rcv_hdr = smb2_get_msg(work->request_buf);222	return le16_to_cpu(rcv_hdr->Command);223}224 225/**226 * set_smb2_rsp_status() - set error response code on smb2 header227 * @work:	smb work containing response buffer228 * @err:	error response code229 */230void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)231{232	struct smb2_hdr *rsp_hdr;233 234	rsp_hdr = smb2_get_msg(work->response_buf);235	rsp_hdr->Status = err;236 237	work->iov_idx = 0;238	work->iov_cnt = 0;239	work->next_smb2_rcv_hdr_off = 0;240	smb2_set_err_rsp(work);241}242 243/**244 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command245 * @work:	smb work containing smb request buffer246 *247 * smb2 negotiate response is sent in reply of smb1 negotiate command for248 * dialect auto-negotiation.249 */250int init_smb2_neg_rsp(struct ksmbd_work *work)251{252	struct smb2_hdr *rsp_hdr;253	struct smb2_negotiate_rsp *rsp;254	struct ksmbd_conn *conn = work->conn;255	int err;256 257	rsp_hdr = smb2_get_msg(work->response_buf);258	memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);259	rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;260	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;261	rsp_hdr->CreditRequest = cpu_to_le16(2);262	rsp_hdr->Command = SMB2_NEGOTIATE;263	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);264	rsp_hdr->NextCommand = 0;265	rsp_hdr->MessageId = 0;266	rsp_hdr->Id.SyncId.ProcessId = 0;267	rsp_hdr->Id.SyncId.TreeId = 0;268	rsp_hdr->SessionId = 0;269	memset(rsp_hdr->Signature, 0, 16);270 271	rsp = smb2_get_msg(work->response_buf);272 273	WARN_ON(ksmbd_conn_good(conn));274 275	rsp->StructureSize = cpu_to_le16(65);276	ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);277	rsp->DialectRevision = cpu_to_le16(conn->dialect);278	/* Not setting conn guid rsp->ServerGUID, as it279	 * not used by client for identifying connection280	 */281	rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);282	/* Default Max Message Size till SMB2.0, 64K*/283	rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);284	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);285	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);286 287	rsp->SystemTime = cpu_to_le64(ksmbd_systime());288	rsp->ServerStartTime = 0;289 290	rsp->SecurityBufferOffset = cpu_to_le16(128);291	rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);292	ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +293		le16_to_cpu(rsp->SecurityBufferOffset));294	rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;295	if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)296		rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;297	err = ksmbd_iov_pin_rsp(work, rsp,298				sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);299	if (err)300		return err;301	conn->use_spnego = true;302 303	ksmbd_conn_set_need_negotiate(conn);304	return 0;305}306 307/**308 * smb2_set_rsp_credits() - set number of credits in response buffer309 * @work:	smb work containing smb response buffer310 */311int smb2_set_rsp_credits(struct ksmbd_work *work)312{313	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);314	struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);315	struct ksmbd_conn *conn = work->conn;316	unsigned short credits_requested, aux_max;317	unsigned short credit_charge, credits_granted = 0;318 319	if (work->send_no_response)320		return 0;321 322	hdr->CreditCharge = req_hdr->CreditCharge;323 324	if (conn->total_credits > conn->vals->max_credits) {325		hdr->CreditRequest = 0;326		pr_err("Total credits overflow: %d\n", conn->total_credits);327		return -EINVAL;328	}329 330	credit_charge = max_t(unsigned short,331			      le16_to_cpu(req_hdr->CreditCharge), 1);332	if (credit_charge > conn->total_credits) {333		ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",334			    credit_charge, conn->total_credits);335		return -EINVAL;336	}337 338	conn->total_credits -= credit_charge;339	conn->outstanding_credits -= credit_charge;340	credits_requested = max_t(unsigned short,341				  le16_to_cpu(req_hdr->CreditRequest), 1);342 343	/* according to smb2.credits smbtorture, Windows server344	 * 2016 or later grant up to 8192 credits at once.345	 *346	 * TODO: Need to adjuct CreditRequest value according to347	 * current cpu load348	 */349	if (hdr->Command == SMB2_NEGOTIATE)350		aux_max = 1;351	else352		aux_max = conn->vals->max_credits - conn->total_credits;353	credits_granted = min_t(unsigned short, credits_requested, aux_max);354 355	conn->total_credits += credits_granted;356	work->credits_granted += credits_granted;357 358	if (!req_hdr->NextCommand) {359		/* Update CreditRequest in last request */360		hdr->CreditRequest = cpu_to_le16(work->credits_granted);361	}362	ksmbd_debug(SMB,363		    "credits: requested[%d] granted[%d] total_granted[%d]\n",364		    credits_requested, credits_granted,365		    conn->total_credits);366	return 0;367}368 369/**370 * init_chained_smb2_rsp() - initialize smb2 chained response371 * @work:	smb work containing smb response buffer372 */373static void init_chained_smb2_rsp(struct ksmbd_work *work)374{375	struct smb2_hdr *req = ksmbd_req_buf_next(work);376	struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);377	struct smb2_hdr *rsp_hdr;378	struct smb2_hdr *rcv_hdr;379	int next_hdr_offset = 0;380	int len, new_len;381 382	/* Len of this response = updated RFC len - offset of previous cmd383	 * in the compound rsp384	 */385 386	/* Storing the current local FID which may be needed by subsequent387	 * command in the compound request388	 */389	if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {390		work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;391		work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;392		work->compound_sid = le64_to_cpu(rsp->SessionId);393	}394 395	len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;396	next_hdr_offset = le32_to_cpu(req->NextCommand);397 398	new_len = ALIGN(len, 8);399	work->iov[work->iov_idx].iov_len += (new_len - len);400	inc_rfc1001_len(work->response_buf, new_len - len);401	rsp->NextCommand = cpu_to_le32(new_len);402 403	work->next_smb2_rcv_hdr_off += next_hdr_offset;404	work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;405	work->next_smb2_rsp_hdr_off += new_len;406	ksmbd_debug(SMB,407		    "Compound req new_len = %d rcv off = %d rsp off = %d\n",408		    new_len, work->next_smb2_rcv_hdr_off,409		    work->next_smb2_rsp_hdr_off);410 411	rsp_hdr = ksmbd_resp_buf_next(work);412	rcv_hdr = ksmbd_req_buf_next(work);413 414	if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {415		ksmbd_debug(SMB, "related flag should be set\n");416		work->compound_fid = KSMBD_NO_FID;417		work->compound_pfid = KSMBD_NO_FID;418	}419	memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);420	rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;421	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;422	rsp_hdr->Command = rcv_hdr->Command;423 424	/*425	 * Message is response. We don't grant oplock yet.426	 */427	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |428				SMB2_FLAGS_RELATED_OPERATIONS);429	rsp_hdr->NextCommand = 0;430	rsp_hdr->MessageId = rcv_hdr->MessageId;431	rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;432	rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;433	rsp_hdr->SessionId = rcv_hdr->SessionId;434	memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);435}436 437/**438 * is_chained_smb2_message() - check for chained command439 * @work:	smb work containing smb request buffer440 *441 * Return:      true if chained request, otherwise false442 */443bool is_chained_smb2_message(struct ksmbd_work *work)444{445	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);446	unsigned int len, next_cmd;447 448	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)449		return false;450 451	hdr = ksmbd_req_buf_next(work);452	next_cmd = le32_to_cpu(hdr->NextCommand);453	if (next_cmd > 0) {454		if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +455			__SMB2_HEADER_STRUCTURE_SIZE >456		    get_rfc1002_len(work->request_buf)) {457			pr_err("next command(%u) offset exceeds smb msg size\n",458			       next_cmd);459			return false;460		}461 462		if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >463		    work->response_sz) {464			pr_err("next response offset exceeds response buffer size\n");465			return false;466		}467 468		ksmbd_debug(SMB, "got SMB2 chained command\n");469		init_chained_smb2_rsp(work);470		return true;471	} else if (work->next_smb2_rcv_hdr_off) {472		/*473		 * This is last request in chained command,474		 * align response to 8 byte475		 */476		len = ALIGN(get_rfc1002_len(work->response_buf), 8);477		len = len - get_rfc1002_len(work->response_buf);478		if (len) {479			ksmbd_debug(SMB, "padding len %u\n", len);480			work->iov[work->iov_idx].iov_len += len;481			inc_rfc1001_len(work->response_buf, len);482		}483		work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;484	}485	return false;486}487 488/**489 * init_smb2_rsp_hdr() - initialize smb2 response490 * @work:	smb work containing smb request buffer491 *492 * Return:      0493 */494int init_smb2_rsp_hdr(struct ksmbd_work *work)495{496	struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);497	struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);498 499	memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);500	rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;501	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;502	rsp_hdr->Command = rcv_hdr->Command;503 504	/*505	 * Message is response. We don't grant oplock yet.506	 */507	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);508	rsp_hdr->NextCommand = 0;509	rsp_hdr->MessageId = rcv_hdr->MessageId;510	rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;511	rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;512	rsp_hdr->SessionId = rcv_hdr->SessionId;513	memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);514 515	return 0;516}517 518/**519 * smb2_allocate_rsp_buf() - allocate smb2 response buffer520 * @work:	smb work containing smb request buffer521 *522 * Return:      0 on success, otherwise error523 */524int smb2_allocate_rsp_buf(struct ksmbd_work *work)525{526	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);527	size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;528	size_t large_sz = small_sz + work->conn->vals->max_trans_size;529	size_t sz = small_sz;530	int cmd = le16_to_cpu(hdr->Command);531 532	if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)533		sz = large_sz;534 535	if (cmd == SMB2_QUERY_INFO_HE) {536		struct smb2_query_info_req *req;537 538		if (get_rfc1002_len(work->request_buf) <539		    offsetof(struct smb2_query_info_req, OutputBufferLength))540			return -EINVAL;541 542		req = smb2_get_msg(work->request_buf);543		if ((req->InfoType == SMB2_O_INFO_FILE &&544		     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||545		     req->FileInfoClass == FILE_ALL_INFORMATION)) ||546		    req->InfoType == SMB2_O_INFO_SECURITY)547			sz = large_sz;548	}549 550	/* allocate large response buf for chained commands */551	if (le32_to_cpu(hdr->NextCommand) > 0)552		sz = large_sz;553 554	work->response_buf = kvzalloc(sz, GFP_KERNEL);555	if (!work->response_buf)556		return -ENOMEM;557 558	work->response_sz = sz;559	return 0;560}561 562/**563 * smb2_check_user_session() - check for valid session for a user564 * @work:	smb work containing smb request buffer565 *566 * Return:      0 on success, otherwise error567 */568int smb2_check_user_session(struct ksmbd_work *work)569{570	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);571	struct ksmbd_conn *conn = work->conn;572	unsigned int cmd = le16_to_cpu(req_hdr->Command);573	unsigned long long sess_id;574 575	/*576	 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not577	 * require a session id, so no need to validate user session's for578	 * these commands.579	 */580	if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||581	    cmd == SMB2_SESSION_SETUP_HE)582		return 0;583 584	if (!ksmbd_conn_good(conn))585		return -EIO;586 587	sess_id = le64_to_cpu(req_hdr->SessionId);588 589	/*590	 * If request is not the first in Compound request,591	 * Just validate session id in header with work->sess->id.592	 */593	if (work->next_smb2_rcv_hdr_off) {594		if (!work->sess) {595			pr_err("The first operation in the compound does not have sess\n");596			return -EINVAL;597		}598		if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {599			pr_err("session id(%llu) is different with the first operation(%lld)\n",600					sess_id, work->sess->id);601			return -EINVAL;602		}603		return 1;604	}605 606	/* Check for validity of user session */607	work->sess = ksmbd_session_lookup_all(conn, sess_id);608	if (work->sess) {609		ksmbd_user_session_get(work->sess);610		return 1;611	}612	ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);613	return -ENOENT;614}615 616/**617 * smb2_get_name() - get filename string from on the wire smb format618 * @src:	source buffer619 * @maxlen:	maxlen of source string620 * @local_nls:	nls_table pointer621 *622 * Return:      matching converted filename on success, otherwise error ptr623 */624static char *625smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)626{627	char *name;628 629	name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);630	if (IS_ERR(name)) {631		pr_err("failed to get name %ld\n", PTR_ERR(name));632		return name;633	}634 635	if (*name == '\\') {636		pr_err("not allow directory name included leading slash\n");637		kfree(name);638		return ERR_PTR(-EINVAL);639	}640 641	ksmbd_conv_path_to_unix(name);642	ksmbd_strip_last_slash(name);643	return name;644}645 646int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)647{648	struct ksmbd_conn *conn = work->conn;649	int id;650 651	id = ksmbd_acquire_async_msg_id(&conn->async_ida);652	if (id < 0) {653		pr_err("Failed to alloc async message id\n");654		return id;655	}656	work->asynchronous = true;657	work->async_id = id;658 659	ksmbd_debug(SMB,660		    "Send interim Response to inform async request id : %d\n",661		    work->async_id);662 663	work->cancel_fn = fn;664	work->cancel_argv = arg;665 666	if (list_empty(&work->async_request_entry)) {667		spin_lock(&conn->request_lock);668		list_add_tail(&work->async_request_entry, &conn->async_requests);669		spin_unlock(&conn->request_lock);670	}671 672	return 0;673}674 675void release_async_work(struct ksmbd_work *work)676{677	struct ksmbd_conn *conn = work->conn;678 679	spin_lock(&conn->request_lock);680	list_del_init(&work->async_request_entry);681	spin_unlock(&conn->request_lock);682 683	work->asynchronous = 0;684	work->cancel_fn = NULL;685	kfree(work->cancel_argv);686	work->cancel_argv = NULL;687	if (work->async_id) {688		ksmbd_release_id(&conn->async_ida, work->async_id);689		work->async_id = 0;690	}691}692 693void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)694{695	struct smb2_hdr *rsp_hdr;696	struct ksmbd_work *in_work = ksmbd_alloc_work_struct();697 698	if (allocate_interim_rsp_buf(in_work)) {699		pr_err("smb_allocate_rsp_buf failed!\n");700		ksmbd_free_work_struct(in_work);701		return;702	}703 704	in_work->conn = work->conn;705	memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),706	       __SMB2_HEADER_STRUCTURE_SIZE);707 708	rsp_hdr = smb2_get_msg(in_work->response_buf);709	rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;710	rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);711	smb2_set_err_rsp(in_work);712	rsp_hdr->Status = status;713 714	ksmbd_conn_write(in_work);715	ksmbd_free_work_struct(in_work);716}717 718static __le32 smb2_get_reparse_tag_special_file(umode_t mode)719{720	if (S_ISDIR(mode) || S_ISREG(mode))721		return 0;722 723	if (S_ISLNK(mode))724		return IO_REPARSE_TAG_LX_SYMLINK_LE;725	else if (S_ISFIFO(mode))726		return IO_REPARSE_TAG_LX_FIFO_LE;727	else if (S_ISSOCK(mode))728		return IO_REPARSE_TAG_AF_UNIX_LE;729	else if (S_ISCHR(mode))730		return IO_REPARSE_TAG_LX_CHR_LE;731	else if (S_ISBLK(mode))732		return IO_REPARSE_TAG_LX_BLK_LE;733 734	return 0;735}736 737/**738 * smb2_get_dos_mode() - get file mode in dos format from unix mode739 * @stat:	kstat containing file mode740 * @attribute:	attribute flags741 *742 * Return:      converted dos mode743 */744static int smb2_get_dos_mode(struct kstat *stat, int attribute)745{746	int attr = 0;747 748	if (S_ISDIR(stat->mode)) {749		attr = FILE_ATTRIBUTE_DIRECTORY |750			(attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));751	} else {752		attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;753		attr &= ~(FILE_ATTRIBUTE_DIRECTORY);754		if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &755				FILE_SUPPORTS_SPARSE_FILES))756			attr |= FILE_ATTRIBUTE_SPARSE_FILE;757 758		if (smb2_get_reparse_tag_special_file(stat->mode))759			attr |= FILE_ATTRIBUTE_REPARSE_POINT;760	}761 762	return attr;763}764 765static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,766			       __le16 hash_id)767{768	pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;769	pneg_ctxt->DataLength = cpu_to_le16(38);770	pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);771	pneg_ctxt->Reserved = cpu_to_le32(0);772	pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);773	get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);774	pneg_ctxt->HashAlgorithms = hash_id;775}776 777static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,778			       __le16 cipher_type)779{780	pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;781	pneg_ctxt->DataLength = cpu_to_le16(4);782	pneg_ctxt->Reserved = cpu_to_le32(0);783	pneg_ctxt->CipherCount = cpu_to_le16(1);784	pneg_ctxt->Ciphers[0] = cipher_type;785}786 787static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,788				__le16 sign_algo)789{790	pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;791	pneg_ctxt->DataLength =792		cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)793			- sizeof(struct smb2_neg_context));794	pneg_ctxt->Reserved = cpu_to_le32(0);795	pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);796	pneg_ctxt->SigningAlgorithms[0] = sign_algo;797}798 799static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)800{801	pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;802	pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);803	/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */804	pneg_ctxt->Name[0] = 0x93;805	pneg_ctxt->Name[1] = 0xAD;806	pneg_ctxt->Name[2] = 0x25;807	pneg_ctxt->Name[3] = 0x50;808	pneg_ctxt->Name[4] = 0x9C;809	pneg_ctxt->Name[5] = 0xB4;810	pneg_ctxt->Name[6] = 0x11;811	pneg_ctxt->Name[7] = 0xE7;812	pneg_ctxt->Name[8] = 0xB4;813	pneg_ctxt->Name[9] = 0x23;814	pneg_ctxt->Name[10] = 0x83;815	pneg_ctxt->Name[11] = 0xDE;816	pneg_ctxt->Name[12] = 0x96;817	pneg_ctxt->Name[13] = 0x8B;818	pneg_ctxt->Name[14] = 0xCD;819	pneg_ctxt->Name[15] = 0x7C;820}821 822static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,823				  struct smb2_negotiate_rsp *rsp)824{825	char * const pneg_ctxt = (char *)rsp +826			le32_to_cpu(rsp->NegotiateContextOffset);827	int neg_ctxt_cnt = 1;828	int ctxt_size;829 830	ksmbd_debug(SMB,831		    "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");832	build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,833			   conn->preauth_info->Preauth_HashId);834	ctxt_size = sizeof(struct smb2_preauth_neg_context);835 836	if (conn->cipher_type) {837		/* Round to 8 byte boundary */838		ctxt_size = round_up(ctxt_size, 8);839		ksmbd_debug(SMB,840			    "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");841		build_encrypt_ctxt((struct smb2_encryption_neg_context *)842				   (pneg_ctxt + ctxt_size),843				   conn->cipher_type);844		neg_ctxt_cnt++;845		ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;846	}847 848	/* compression context not yet supported */849	WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);850 851	if (conn->posix_ext_supported) {852		ctxt_size = round_up(ctxt_size, 8);853		ksmbd_debug(SMB,854			    "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");855		build_posix_ctxt((struct smb2_posix_neg_context *)856				 (pneg_ctxt + ctxt_size));857		neg_ctxt_cnt++;858		ctxt_size += sizeof(struct smb2_posix_neg_context);859	}860 861	if (conn->signing_negotiated) {862		ctxt_size = round_up(ctxt_size, 8);863		ksmbd_debug(SMB,864			    "assemble SMB2_SIGNING_CAPABILITIES context\n");865		build_sign_cap_ctxt((struct smb2_signing_capabilities *)866				    (pneg_ctxt + ctxt_size),867				    conn->signing_algorithm);868		neg_ctxt_cnt++;869		ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;870	}871 872	rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);873	return ctxt_size + AUTH_GSS_PADDING;874}875 876static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,877				  struct smb2_preauth_neg_context *pneg_ctxt,878				  int ctxt_len)879{880	/*881	 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,882	 * which may not be present. Only check for used HashAlgorithms[1].883	 */884	if (ctxt_len <885	    sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)886		return STATUS_INVALID_PARAMETER;887 888	if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)889		return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;890 891	conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;892	return STATUS_SUCCESS;893}894 895static void decode_encrypt_ctxt(struct ksmbd_conn *conn,896				struct smb2_encryption_neg_context *pneg_ctxt,897				int ctxt_len)898{899	int cph_cnt;900	int i, cphs_size;901 902	if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {903		pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");904		return;905	}906 907	conn->cipher_type = 0;908 909	cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);910	cphs_size = cph_cnt * sizeof(__le16);911 912	if (sizeof(struct smb2_encryption_neg_context) + cphs_size >913	    ctxt_len) {914		pr_err("Invalid cipher count(%d)\n", cph_cnt);915		return;916	}917 918	if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)919		return;920 921	for (i = 0; i < cph_cnt; i++) {922		if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||923		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||924		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||925		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {926			ksmbd_debug(SMB, "Cipher ID = 0x%x\n",927				    pneg_ctxt->Ciphers[i]);928			conn->cipher_type = pneg_ctxt->Ciphers[i];929			break;930		}931	}932}933 934/**935 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption936 * @conn:	smb connection937 *938 * Return:	true if connection should be encrypted, else false939 */940bool smb3_encryption_negotiated(struct ksmbd_conn *conn)941{942	if (!conn->ops->generate_encryptionkey)943		return false;944 945	/*946	 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.947	 * SMB 3.1.1 uses the cipher_type field.948	 */949	return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||950	    conn->cipher_type;951}952 953static void decode_compress_ctxt(struct ksmbd_conn *conn,954				 struct smb2_compression_capabilities_context *pneg_ctxt)955{956	conn->compress_algorithm = SMB3_COMPRESS_NONE;957}958 959static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,960				 struct smb2_signing_capabilities *pneg_ctxt,961				 int ctxt_len)962{963	int sign_algo_cnt;964	int i, sign_alos_size;965 966	if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {967		pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");968		return;969	}970 971	conn->signing_negotiated = false;972	sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);973	sign_alos_size = sign_algo_cnt * sizeof(__le16);974 975	if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >976	    ctxt_len) {977		pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);978		return;979	}980 981	for (i = 0; i < sign_algo_cnt; i++) {982		if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||983		    pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {984			ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",985				    pneg_ctxt->SigningAlgorithms[i]);986			conn->signing_negotiated = true;987			conn->signing_algorithm =988				pneg_ctxt->SigningAlgorithms[i];989			break;990		}991	}992}993 994static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,995				      struct smb2_negotiate_req *req,996				      unsigned int len_of_smb)997{998	/* +4 is to account for the RFC1001 len field */999	struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;1000	int i = 0, len_of_ctxts;1001	unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);1002	unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);1003	__le32 status = STATUS_INVALID_PARAMETER;1004 1005	ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);1006	if (len_of_smb <= offset) {1007		ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");1008		return status;1009	}1010 1011	len_of_ctxts = len_of_smb - offset;1012 1013	while (i++ < neg_ctxt_cnt) {1014		int clen, ctxt_len;1015 1016		if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))1017			break;1018 1019		pctx = (struct smb2_neg_context *)((char *)pctx + offset);1020		clen = le16_to_cpu(pctx->DataLength);1021		ctxt_len = clen + sizeof(struct smb2_neg_context);1022 1023		if (ctxt_len > len_of_ctxts)1024			break;1025 1026		if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {1027			ksmbd_debug(SMB,1028				    "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");1029			if (conn->preauth_info->Preauth_HashId)1030				break;1031 1032			status = decode_preauth_ctxt(conn,1033						     (struct smb2_preauth_neg_context *)pctx,1034						     ctxt_len);1035			if (status != STATUS_SUCCESS)1036				break;1037		} else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {1038			ksmbd_debug(SMB,1039				    "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");1040			if (conn->cipher_type)1041				break;1042 1043			decode_encrypt_ctxt(conn,1044					    (struct smb2_encryption_neg_context *)pctx,1045					    ctxt_len);1046		} else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {1047			ksmbd_debug(SMB,1048				    "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");1049			if (conn->compress_algorithm)1050				break;1051 1052			decode_compress_ctxt(conn,1053					     (struct smb2_compression_capabilities_context *)pctx);1054		} else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {1055			ksmbd_debug(SMB,1056				    "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");1057		} else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {1058			ksmbd_debug(SMB,1059				    "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");1060			conn->posix_ext_supported = true;1061		} else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {1062			ksmbd_debug(SMB,1063				    "deassemble SMB2_SIGNING_CAPABILITIES context\n");1064 1065			decode_sign_cap_ctxt(conn,1066					     (struct smb2_signing_capabilities *)pctx,1067					     ctxt_len);1068		}1069 1070		/* offsets must be 8 byte aligned */1071		offset = (ctxt_len + 7) & ~0x7;1072		len_of_ctxts -= offset;1073	}1074	return status;1075}1076 1077/**1078 * smb2_handle_negotiate() - handler for smb2 negotiate command1079 * @work:	smb work containing smb request buffer1080 *1081 * Return:      01082 */1083int smb2_handle_negotiate(struct ksmbd_work *work)1084{1085	struct ksmbd_conn *conn = work->conn;1086	struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);1087	struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);1088	int rc = 0;1089	unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;1090	__le32 status;1091 1092	ksmbd_debug(SMB, "Received negotiate request\n");1093	conn->need_neg = false;1094	if (ksmbd_conn_good(conn)) {1095		pr_err("conn->tcp_status is already in CifsGood State\n");1096		work->send_no_response = 1;1097		return rc;1098	}1099 1100	smb2_buf_len = get_rfc1002_len(work->request_buf);1101	smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);1102	if (smb2_neg_size > smb2_buf_len) {1103		rsp->hdr.Status = STATUS_INVALID_PARAMETER;1104		rc = -EINVAL;1105		goto err_out;1106	}1107 1108	if (req->DialectCount == 0) {1109		pr_err("malformed packet\n");1110		rsp->hdr.Status = STATUS_INVALID_PARAMETER;1111		rc = -EINVAL;1112		goto err_out;1113	}1114 1115	if (conn->dialect == SMB311_PROT_ID) {1116		unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);1117 1118		if (smb2_buf_len < nego_ctxt_off) {1119			rsp->hdr.Status = STATUS_INVALID_PARAMETER;1120			rc = -EINVAL;1121			goto err_out;1122		}1123 1124		if (smb2_neg_size > nego_ctxt_off) {1125			rsp->hdr.Status = STATUS_INVALID_PARAMETER;1126			rc = -EINVAL;1127			goto err_out;1128		}1129 1130		if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >1131		    nego_ctxt_off) {1132			rsp->hdr.Status = STATUS_INVALID_PARAMETER;1133			rc = -EINVAL;1134			goto err_out;1135		}1136	} else {1137		if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >1138		    smb2_buf_len) {1139			rsp->hdr.Status = STATUS_INVALID_PARAMETER;1140			rc = -EINVAL;1141			goto err_out;1142		}1143	}1144 1145	conn->cli_cap = le32_to_cpu(req->Capabilities);1146	switch (conn->dialect) {1147	case SMB311_PROT_ID:1148		conn->preauth_info =1149			kzalloc(sizeof(struct preauth_integrity_info),1150				GFP_KERNEL);1151		if (!conn->preauth_info) {1152			rc = -ENOMEM;1153			rsp->hdr.Status = STATUS_INVALID_PARAMETER;1154			goto err_out;1155		}1156 1157		status = deassemble_neg_contexts(conn, req,1158						 get_rfc1002_len(work->request_buf));1159		if (status != STATUS_SUCCESS) {1160			pr_err("deassemble_neg_contexts error(0x%x)\n",1161			       status);1162			rsp->hdr.Status = status;1163			rc = -EINVAL;1164			kfree(conn->preauth_info);1165			conn->preauth_info = NULL;1166			goto err_out;1167		}1168 1169		rc = init_smb3_11_server(conn);1170		if (rc < 0) {1171			rsp->hdr.Status = STATUS_INVALID_PARAMETER;1172			kfree(conn->preauth_info);1173			conn->preauth_info = NULL;1174			goto err_out;1175		}1176 1177		ksmbd_gen_preauth_integrity_hash(conn,1178						 work->request_buf,1179						 conn->preauth_info->Preauth_HashValue);1180		rsp->NegotiateContextOffset =1181				cpu_to_le32(OFFSET_OF_NEG_CONTEXT);1182		neg_ctxt_len = assemble_neg_contexts(conn, rsp);1183		break;1184	case SMB302_PROT_ID:1185		init_smb3_02_server(conn);1186		break;1187	case SMB30_PROT_ID:1188		init_smb3_0_server(conn);1189		break;1190	case SMB21_PROT_ID:1191		init_smb2_1_server(conn);1192		break;1193	case SMB2X_PROT_ID:1194	case BAD_PROT_ID:1195	default:1196		ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",1197			    conn->dialect);1198		rsp->hdr.Status = STATUS_NOT_SUPPORTED;1199		rc = -EINVAL;1200		goto err_out;1201	}1202	rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);1203 1204	/* For stats */1205	conn->connection_type = conn->dialect;1206 1207	rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);1208	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);1209	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);1210 1211	memcpy(conn->ClientGUID, req->ClientGUID,1212			SMB2_CLIENT_GUID_SIZE);1213	conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);1214 1215	rsp->StructureSize = cpu_to_le16(65);1216	rsp->DialectRevision = cpu_to_le16(conn->dialect);1217	/* Not setting conn guid rsp->ServerGUID, as it1218	 * not used by client for identifying server1219	 */1220	memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);1221 1222	rsp->SystemTime = cpu_to_le64(ksmbd_systime());1223	rsp->ServerStartTime = 0;1224	ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",1225		    le32_to_cpu(rsp->NegotiateContextOffset),1226		    le16_to_cpu(rsp->NegotiateContextCount));1227 1228	rsp->SecurityBufferOffset = cpu_to_le16(128);1229	rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);1230	ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +1231				  le16_to_cpu(rsp->SecurityBufferOffset));1232 1233	rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;1234	conn->use_spnego = true;1235 1236	if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||1237	     server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&1238	    req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)1239		conn->sign = true;1240	else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {1241		server_conf.enforced_signing = true;1242		rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;1243		conn->sign = true;1244	}1245 1246	conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);1247	ksmbd_conn_set_need_negotiate(conn);1248 1249err_out:1250	if (rc)1251		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;1252 1253	if (!rc)1254		rc = ksmbd_iov_pin_rsp(work, rsp,1255				       sizeof(struct smb2_negotiate_rsp) +1256					AUTH_GSS_LENGTH + neg_ctxt_len);1257	if (rc < 0)1258		smb2_set_err_rsp(work);1259	return rc;1260}1261 1262static int alloc_preauth_hash(struct ksmbd_session *sess,1263			      struct ksmbd_conn *conn)1264{1265	if (sess->Preauth_HashValue)1266		return 0;1267 1268	sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,1269					  PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);1270	if (!sess->Preauth_HashValue)1271		return -ENOMEM;1272 1273	return 0;1274}1275 1276static int generate_preauth_hash(struct ksmbd_work *work)1277{1278	struct ksmbd_conn *conn = work->conn;1279	struct ksmbd_session *sess = work->sess;1280	u8 *preauth_hash;1281 1282	if (conn->dialect != SMB311_PROT_ID)1283		return 0;1284 1285	if (conn->binding) {1286		struct preauth_session *preauth_sess;1287 1288		preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);1289		if (!preauth_sess) {1290			preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);1291			if (!preauth_sess)1292				return -ENOMEM;1293		}1294 1295		preauth_hash = preauth_sess->Preauth_HashValue;1296	} else {1297		if (!sess->Preauth_HashValue)1298			if (alloc_preauth_hash(sess, conn))1299				return -ENOMEM;1300		preauth_hash = sess->Preauth_HashValue;1301	}1302 1303	ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);1304	return 0;1305}1306 1307static int decode_negotiation_token(struct ksmbd_conn *conn,1308				    struct negotiate_message *negblob,1309				    size_t sz)1310{1311	if (!conn->use_spnego)1312		return -EINVAL;1313 1314	if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {1315		if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {1316			conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;1317			conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;1318			conn->use_spnego = false;1319		}1320	}1321	return 0;1322}1323 1324static int ntlm_negotiate(struct ksmbd_work *work,1325			  struct negotiate_message *negblob,1326			  size_t negblob_len, struct smb2_sess_setup_rsp *rsp)1327{1328	struct challenge_message *chgblob;1329	unsigned char *spnego_blob = NULL;1330	u16 spnego_blob_len;1331	char *neg_blob;1332	int sz, rc;1333 1334	ksmbd_debug(SMB, "negotiate phase\n");1335	rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);1336	if (rc)1337		return rc;1338 1339	sz = le16_to_cpu(rsp->SecurityBufferOffset);1340	chgblob = (struct challenge_message *)rsp->Buffer;1341	memset(chgblob, 0, sizeof(struct challenge_message));1342 1343	if (!work->conn->use_spnego) {1344		sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);1345		if (sz < 0)1346			return -ENOMEM;1347 1348		rsp->SecurityBufferLength = cpu_to_le16(sz);1349		return 0;1350	}1351 1352	sz = sizeof(struct challenge_message);1353	sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;1354 1355	neg_blob = kzalloc(sz, GFP_KERNEL);1356	if (!neg_blob)1357		return -ENOMEM;1358 1359	chgblob = (struct challenge_message *)neg_blob;1360	sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);1361	if (sz < 0) {1362		rc = -ENOMEM;1363		goto out;1364	}1365 1366	rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,1367					   neg_blob, sz);1368	if (rc) {1369		rc = -ENOMEM;1370		goto out;1371	}1372 1373	memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);1374	rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);1375 1376out:1377	kfree(spnego_blob);1378	kfree(neg_blob);1379	return rc;1380}1381 1382static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,1383						  struct smb2_sess_setup_req *req)1384{1385	int sz;1386 1387	if (conn->use_spnego && conn->mechToken)1388		return (struct authenticate_message *)conn->mechToken;1389 1390	sz = le16_to_cpu(req->SecurityBufferOffset);1391	return (struct authenticate_message *)((char *)&req->hdr.ProtocolId1392					       + sz);1393}1394 1395static struct ksmbd_user *session_user(struct ksmbd_conn *conn,1396				       struct smb2_sess_setup_req *req)1397{1398	struct authenticate_message *authblob;1399	struct ksmbd_user *user;1400	char *name;1401	unsigned int name_off, name_len, secbuf_len;1402 1403	if (conn->use_spnego && conn->mechToken)1404		secbuf_len = conn->mechTokenLen;1405	else1406		secbuf_len = le16_to_cpu(req->SecurityBufferLength);1407	if (secbuf_len < sizeof(struct authenticate_message)) {1408		ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);1409		return NULL;1410	}1411	authblob = user_authblob(conn, req);1412	name_off = le32_to_cpu(authblob->UserName.BufferOffset);1413	name_len = le16_to_cpu(authblob->UserName.Length);1414 1415	if (secbuf_len < (u64)name_off + name_len)1416		return NULL;1417 1418	name = smb_strndup_from_utf16((const char *)authblob + name_off,1419				      name_len,1420				      true,1421				      conn->local_nls);1422	if (IS_ERR(name)) {1423		pr_err("cannot allocate memory\n");1424		return NULL;1425	}1426 1427	ksmbd_debug(SMB, "session setup request for user %s\n", name);1428	user = ksmbd_login_user(name);1429	kfree(name);1430	return user;1431}1432 1433static int ntlm_authenticate(struct ksmbd_work *work,1434			     struct smb2_sess_setup_req *req,1435			     struct smb2_sess_setup_rsp *rsp)1436{1437	struct ksmbd_conn *conn = work->conn;1438	struct ksmbd_session *sess = work->sess;1439	struct channel *chann = NULL;1440	struct ksmbd_user *user;1441	u64 prev_id;1442	int sz, rc;1443 1444	ksmbd_debug(SMB, "authenticate phase\n");1445	if (conn->use_spnego) {1446		unsigned char *spnego_blob;1447		u16 spnego_blob_len;1448 1449		rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,1450						    &spnego_blob_len,1451						    0);1452		if (rc)1453			return -ENOMEM;1454 1455		memcpy(rsp->Buffer, spnego_blob, spnego_blob_len);1456		rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);1457		kfree(spnego_blob);1458	}1459 1460	user = session_user(conn, req);1461	if (!user) {1462		ksmbd_debug(SMB, "Unknown user name or an error\n");1463		return -EPERM;1464	}1465 1466	/* Check for previous session */1467	prev_id = le64_to_cpu(req->PreviousSessionId);1468	if (prev_id && prev_id != sess->id)1469		destroy_previous_session(conn, user, prev_id);1470 1471	if (sess->state == SMB2_SESSION_VALID) {1472		/*1473		 * Reuse session if anonymous try to connect1474		 * on reauthetication.1475		 */1476		if (conn->binding == false && ksmbd_anonymous_user(user)) {1477			ksmbd_free_user(user);1478			return 0;1479		}1480 1481		if (!ksmbd_compare_user(sess->user, user)) {1482			ksmbd_free_user(user);1483			return -EPERM;1484		}1485		ksmbd_free_user(user);1486	} else {1487		sess->user = user;1488	}1489 1490	if (conn->binding == false && user_guest(sess->user)) {1491		rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;1492	} else {1493		struct authenticate_message *authblob;1494 1495		authblob = user_authblob(conn, req);1496		if (conn->use_spnego && conn->mechToken)1497			sz = conn->mechTokenLen;1498		else1499			sz = le16_to_cpu(req->SecurityBufferLength);1500		rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);1501		if (rc) {1502			set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);1503			ksmbd_debug(SMB, "authentication failed\n");1504			return -EPERM;1505		}1506	}1507 1508	/*1509	 * If session state is SMB2_SESSION_VALID, We can assume1510	 * that it is reauthentication. And the user/password1511	 * has been verified, so return it here.1512	 */1513	if (sess->state == SMB2_SESSION_VALID) {1514		if (conn->binding)1515			goto binding_session;1516		return 0;1517	}1518 1519	if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&1520	     (conn->sign || server_conf.enforced_signing)) ||1521	    (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))1522		sess->sign = true;1523 1524	if (smb3_encryption_negotiated(conn) &&1525			!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {1526		rc = conn->ops->generate_encryptionkey(conn, sess);1527		if (rc) {1528			ksmbd_debug(SMB,1529					"SMB3 encryption key generation failed\n");1530			return -EINVAL;1531		}1532		sess->enc = true;1533		if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)1534			rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;1535		/*1536		 * signing is disable if encryption is enable1537		 * on this session1538		 */1539		sess->sign = false;1540	}1541 1542binding_session:1543	if (conn->dialect >= SMB30_PROT_ID) {1544		chann = lookup_chann_list(sess, conn);1545		if (!chann) {1546			chann = kmalloc(sizeof(struct channel), GFP_KERNEL);1547			if (!chann)1548				return -ENOMEM;1549 1550			chann->conn = conn;1551			xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);1552		}1553	}1554 1555	if (conn->ops->generate_signingkey) {1556		rc = conn->ops->generate_signingkey(sess, conn);1557		if (rc) {1558			ksmbd_debug(SMB, "SMB3 signing key generation failed\n");1559			return -EINVAL;1560		}1561	}1562 1563	if (!ksmbd_conn_lookup_dialect(conn)) {1564		pr_err("fail to verify the dialect\n");1565		return -ENOENT;1566	}1567	return 0;1568}1569 1570#ifdef CONFIG_SMB_SERVER_KERBEROS51571static int krb5_authenticate(struct ksmbd_work *work,1572			     struct smb2_sess_setup_req *req,1573			     struct smb2_sess_setup_rsp *rsp)1574{1575	struct ksmbd_conn *conn = work->conn;1576	struct ksmbd_session *sess = work->sess;1577	char *in_blob, *out_blob;1578	struct channel *chann = NULL;1579	u64 prev_sess_id;1580	int in_len, out_len;1581	int retval;1582 1583	in_blob = (char *)&req->hdr.ProtocolId +1584		le16_to_cpu(req->SecurityBufferOffset);1585	in_len = le16_to_cpu(req->SecurityBufferLength);1586	out_blob = (char *)&rsp->hdr.ProtocolId +1587		le16_to_cpu(rsp->SecurityBufferOffset);1588	out_len = work->response_sz -1589		(le16_to_cpu(rsp->SecurityBufferOffset) + 4);1590 1591	/* Check previous session */1592	prev_sess_id = le64_to_cpu(req->PreviousSessionId);1593	if (prev_sess_id && prev_sess_id != sess->id)1594		destroy_previous_session(conn, sess->user, prev_sess_id);1595 1596	if (sess->state == SMB2_SESSION_VALID)1597		ksmbd_free_user(sess->user);1598 1599	retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,1600					 out_blob, &out_len);1601	if (retval) {1602		ksmbd_debug(SMB, "krb5 authentication failed\n");1603		return -EINVAL;1604	}1605	rsp->SecurityBufferLength = cpu_to_le16(out_len);1606 1607	if ((conn->sign || server_conf.enforced_signing) ||1608	    (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))1609		sess->sign = true;1610 1611	if (smb3_encryption_negotiated(conn)) {1612		retval = conn->ops->generate_encryptionkey(conn, sess);1613		if (retval) {1614			ksmbd_debug(SMB,1615				    "SMB3 encryption key generation failed\n");1616			return -EINVAL;1617		}1618		sess->enc = true;1619		if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)1620			rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;1621		sess->sign = false;1622	}1623 1624	if (conn->dialect >= SMB30_PROT_ID) {1625		chann = lookup_chann_list(sess, conn);1626		if (!chann) {1627			chann = kmalloc(sizeof(struct channel), GFP_KERNEL);1628			if (!chann)1629				return -ENOMEM;1630 1631			chann->conn = conn;1632			xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);1633		}1634	}1635 1636	if (conn->ops->generate_signingkey) {1637		retval = conn->ops->generate_signingkey(sess, conn);1638		if (retval) {1639			ksmbd_debug(SMB, "SMB3 signing key generation failed\n");1640			return -EINVAL;1641		}1642	}1643 1644	if (!ksmbd_conn_lookup_dialect(conn)) {1645		pr_err("fail to verify the dialect\n");1646		return -ENOENT;1647	}1648	return 0;1649}1650#else1651static int krb5_authenticate(struct ksmbd_work *work,1652			     struct smb2_sess_setup_req *req,1653			     struct smb2_sess_setup_rsp *rsp)1654{1655	return -EOPNOTSUPP;1656}1657#endif1658 1659int smb2_sess_setup(struct ksmbd_work *work)1660{1661	struct ksmbd_conn *conn = work->conn;1662	struct smb2_sess_setup_req *req;1663	struct smb2_sess_setup_rsp *rsp;1664	struct ksmbd_session *sess;1665	struct negotiate_message *negblob;1666	unsigned int negblob_len, negblob_off;1667	int rc = 0;1668 1669	ksmbd_debug(SMB, "Received request for session setup\n");1670 1671	WORK_BUFFERS(work, req, rsp);1672 1673	rsp->StructureSize = cpu_to_le16(9);1674	rsp->SessionFlags = 0;1675	rsp->SecurityBufferOffset = cpu_to_le16(72);1676	rsp->SecurityBufferLength = 0;1677 1678	ksmbd_conn_lock(conn);1679	if (!req->hdr.SessionId) {1680		sess = ksmbd_smb2_session_create();1681		if (!sess) {1682			rc = -ENOMEM;1683			goto out_err;1684		}1685		rsp->hdr.SessionId = cpu_to_le64(sess->id);1686		rc = ksmbd_session_register(conn, sess);1687		if (rc)1688			goto out_err;1689 1690		conn->binding = false;1691	} else if (conn->dialect >= SMB30_PROT_ID &&1692		   (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&1693		   req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {1694		u64 sess_id = le64_to_cpu(req->hdr.SessionId);1695 1696		sess = ksmbd_session_lookup_slowpath(sess_id);1697		if (!sess) {1698			rc = -ENOENT;1699			goto out_err;1700		}1701 1702		if (conn->dialect != sess->dialect) {1703			rc = -EINVAL;1704			goto out_err;1705		}1706 1707		if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {1708			rc = -EINVAL;1709			goto out_err;1710		}1711 1712		if (strncmp(conn->ClientGUID, sess->ClientGUID,1713			    SMB2_CLIENT_GUID_SIZE)) {1714			rc = -ENOENT;1715			goto out_err;1716		}1717 1718		if (sess->state == SMB2_SESSION_IN_PROGRESS) {1719			rc = -EACCES;1720			goto out_err;1721		}1722 1723		if (sess->state == SMB2_SESSION_EXPIRED) {1724			rc = -EFAULT;1725			goto out_err;1726		}1727 1728		if (ksmbd_conn_need_reconnect(conn)) {1729			rc = -EFAULT;1730			sess = NULL;1731			goto out_err;1732		}1733 1734		if (ksmbd_session_lookup(conn, sess_id)) {1735			rc = -EACCES;1736			goto out_err;1737		}1738 1739		if (user_guest(sess->user)) {1740			rc = -EOPNOTSUPP;1741			goto out_err;1742		}1743 1744		conn->binding = true;1745		ksmbd_user_session_get(sess);1746	} else if ((conn->dialect < SMB30_PROT_ID ||1747		    server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&1748		   (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {1749		sess = NULL;1750		rc = -EACCES;1751		goto out_err;1752	} else {1753		sess = ksmbd_session_lookup(conn,1754					    le64_to_cpu(req->hdr.SessionId));1755		if (!sess) {1756			rc = -ENOENT;1757			goto out_err;1758		}1759 1760		if (sess->state == SMB2_SESSION_EXPIRED) {1761			rc = -EFAULT;1762			goto out_err;1763		}1764 1765		if (ksmbd_conn_need_reconnect(conn)) {1766			rc = -EFAULT;1767			sess = NULL;1768			goto out_err;1769		}1770 1771		conn->binding = false;1772		ksmbd_user_session_get(sess);1773	}1774	work->sess = sess;1775 1776	negblob_off = le16_to_cpu(req->SecurityBufferOffset);1777	negblob_len = le16_to_cpu(req->SecurityBufferLength);1778	if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {1779		rc = -EINVAL;1780		goto out_err;1781	}1782 1783	negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +1784			negblob_off);1785 1786	if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {1787		if (conn->mechToken) {1788			negblob = (struct negotiate_message *)conn->mechToken;1789			negblob_len = conn->mechTokenLen;1790		}1791	}1792 1793	if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {1794		rc = -EINVAL;1795		goto out_err;1796	}1797 1798	if (server_conf.auth_mechs & conn->auth_mechs) {1799		rc = generate_preauth_hash(work);1800		if (rc)1801			goto out_err;1802 1803		if (conn->preferred_auth_mech &1804				(KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {1805			rc = krb5_authenticate(work, req, rsp);1806			if (rc) {1807				rc = -EINVAL;1808				goto out_err;1809			}1810 1811			if (!ksmbd_conn_need_reconnect(conn)) {1812				ksmbd_conn_set_good(conn);1813				sess->state = SMB2_SESSION_VALID;1814			}1815			kfree(sess->Preauth_HashValue);1816			sess->Preauth_HashValue = NULL;1817		} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {1818			if (negblob->MessageType == NtLmNegotiate) {1819				rc = ntlm_negotiate(work, negblob, negblob_len, rsp);1820				if (rc)1821					goto out_err;1822				rsp->hdr.Status =1823					STATUS_MORE_PROCESSING_REQUIRED;1824			} else if (negblob->MessageType == NtLmAuthenticate) {1825				rc = ntlm_authenticate(work, req, rsp);1826				if (rc)1827					goto out_err;1828 1829				if (!ksmbd_conn_need_reconnect(conn)) {1830					ksmbd_conn_set_good(conn);1831					sess->state = SMB2_SESSION_VALID;1832				}1833				if (conn->binding) {1834					struct preauth_session *preauth_sess;1835 1836					preauth_sess =1837						ksmbd_preauth_session_lookup(conn, sess->id);1838					if (preauth_sess) {1839						list_del(&preauth_sess->preauth_entry);1840						kfree(preauth_sess);1841					}1842				}1843				kfree(sess->Preauth_HashValue);1844				sess->Preauth_HashValue = NULL;1845			} else {1846				pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",1847						le32_to_cpu(negblob->MessageType));1848				rc = -EINVAL;1849			}1850		} else {1851			/* TODO: need one more negotiation */1852			pr_err("Not support the preferred authentication\n");1853			rc = -EINVAL;1854		}1855	} else {1856		pr_err("Not support authentication\n");1857		rc = -EINVAL;1858	}1859 1860out_err:1861	if (rc == -EINVAL)1862		rsp->hdr.Status = STATUS_INVALID_PARAMETER;1863	else if (rc == -ENOENT)1864		rsp->hdr.Status = STATUS_USER_SESSION_DELETED;1865	else if (rc == -EACCES)1866		rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;1867	else if (rc == -EFAULT)1868		rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;1869	else if (rc == -ENOMEM)1870		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;1871	else if (rc == -EOPNOTSUPP)1872		rsp->hdr.Status = STATUS_NOT_SUPPORTED;1873	else if (rc)1874		rsp->hdr.Status = STATUS_LOGON_FAILURE;1875 1876	if (conn->use_spnego && conn->mechToken) {1877		kfree(conn->mechToken);1878		conn->mechToken = NULL;1879	}1880 1881	if (rc < 0) {1882		/*1883		 * SecurityBufferOffset should be set to zero1884		 * in session setup error response.1885		 */1886		rsp->SecurityBufferOffset = 0;1887 1888		if (sess) {1889			bool try_delay = false;1890 1891			/*1892			 * To avoid dictionary attacks (repeated session setups rapidly sent) to1893			 * connect to server, ksmbd make a delay of a 5 seconds on session setup1894			 * failure to make it harder to send enough random connection requests1895			 * to break into a server.1896			 */1897			if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)1898				try_delay = true;1899 1900			sess->last_active = jiffies;1901			sess->state = SMB2_SESSION_EXPIRED;1902			if (try_delay) {1903				ksmbd_conn_set_need_reconnect(conn);1904				ssleep(5);1905				ksmbd_conn_set_need_negotiate(conn);1906			}1907		}1908		smb2_set_err_rsp(work);1909	} else {1910		unsigned int iov_len;1911 1912		if (rsp->SecurityBufferLength)1913			iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +1914				le16_to_cpu(rsp->SecurityBufferLength);1915		else1916			iov_len = sizeof(struct smb2_sess_setup_rsp);1917		rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);1918		if (rc)1919			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;1920	}1921 1922	ksmbd_conn_unlock(conn);1923	return rc;1924}1925 1926/**1927 * smb2_tree_connect() - handler for smb2 tree connect command1928 * @work:	smb work containing smb request buffer1929 *1930 * Return:      0 on success, otherwise error1931 */1932int smb2_tree_connect(struct ksmbd_work *work)1933{1934	struct ksmbd_conn *conn = work->conn;1935	struct smb2_tree_connect_req *req;1936	struct smb2_tree_connect_rsp *rsp;1937	struct ksmbd_session *sess = work->sess;1938	char *treename = NULL, *name = NULL;1939	struct ksmbd_tree_conn_status status;1940	struct ksmbd_share_config *share = NULL;1941	int rc = -EINVAL;1942 1943	WORK_BUFFERS(work, req, rsp);1944 1945	treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset),1946					  le16_to_cpu(req->PathLength), true,1947					  conn->local_nls);1948	if (IS_ERR(treename)) {1949		pr_err("treename is NULL\n");1950		status.ret = KSMBD_TREE_CONN_STATUS_ERROR;1951		goto out_err1;1952	}1953 1954	name = ksmbd_extract_sharename(conn->um, treename);1955	if (IS_ERR(name)) {1956		status.ret = KSMBD_TREE_CONN_STATUS_ERROR;1957		goto out_err1;1958	}1959 1960	ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",1961		    name, treename);1962 1963	status = ksmbd_tree_conn_connect(work, name);1964	if (status.ret == KSMBD_TREE_CONN_STATUS_OK)1965		rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);1966	else1967		goto out_err1;1968 1969	share = status.tree_conn->share_conf;1970	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {1971		ksmbd_debug(SMB, "IPC share path request\n");1972		rsp->ShareType = SMB2_SHARE_TYPE_PIPE;1973		rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |1974			FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |1975			FILE_DELETE_LE | FILE_READ_CONTROL_LE |1976			FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |1977			FILE_SYNCHRONIZE_LE;1978	} else {1979		rsp->ShareType = SMB2_SHARE_TYPE_DISK;1980		rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |1981			FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;1982		if (test_tree_conn_flag(status.tree_conn,1983					KSMBD_TREE_CONN_FLAG_WRITABLE)) {1984			rsp->MaximalAccess |= FILE_WRITE_DATA_LE |1985				FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |1986				FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |1987				FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |1988				FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |1989				FILE_SYNCHRONIZE_LE;1990		}1991	}1992 1993	status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);1994	if (conn->posix_ext_supported)1995		status.tree_conn->posix_extensions = true;1996 1997	write_lock(&sess->tree_conns_lock);1998	status.tree_conn->t_state = TREE_CONNECTED;1999	write_unlock(&sess->tree_conns_lock);2000	rsp->StructureSize = cpu_to_le16(16);2001out_err1:2002	if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share &&2003	    test_share_config_flag(share,2004				   KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))2005		rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;2006	else2007		rsp->Capabilities = 0;2008	rsp->Reserved = 0;2009	/* default manual caching */2010	rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;2011 2012	rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));2013	if (rc)2014		status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;2015 2016	if (!IS_ERR(treename))2017		kfree(treename);2018	if (!IS_ERR(name))2019		kfree(name);2020 2021	switch (status.ret) {2022	case KSMBD_TREE_CONN_STATUS_OK:2023		rsp->hdr.Status = STATUS_SUCCESS;2024		rc = 0;2025		break;2026	case -ESTALE:2027	case -ENOENT:2028	case KSMBD_TREE_CONN_STATUS_NO_SHARE:2029		rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;2030		break;2031	case -ENOMEM:2032	case KSMBD_TREE_CONN_STATUS_NOMEM:2033		rsp->hdr.Status = STATUS_NO_MEMORY;2034		break;2035	case KSMBD_TREE_CONN_STATUS_ERROR:2036	case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:2037	case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:2038		rsp->hdr.Status = STATUS_ACCESS_DENIED;2039		break;2040	case -EINVAL:2041		rsp->hdr.Status = STATUS_INVALID_PARAMETER;2042		break;2043	default:2044		rsp->hdr.Status = STATUS_ACCESS_DENIED;2045	}2046 2047	if (status.ret != KSMBD_TREE_CONN_STATUS_OK)2048		smb2_set_err_rsp(work);2049 2050	return rc;2051}2052 2053/**2054 * smb2_create_open_flags() - convert smb open flags to unix open flags2055 * @file_present:	is file already present2056 * @access:		file access flags2057 * @disposition:	file disposition flags2058 * @may_flags:		set with MAY_ flags2059 * @coptions:		file creation options2060 * @mode:		file mode2061 *2062 * Return:      file open flags2063 */2064static int smb2_create_open_flags(bool file_present, __le32 access,2065				  __le32 disposition,2066				  int *may_flags,2067				  __le32 coptions,2068				  umode_t mode)2069{2070	int oflags = O_NONBLOCK | O_LARGEFILE;2071 2072	if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) {2073		access &= ~FILE_WRITE_DESIRE_ACCESS_LE;2074		ksmbd_debug(SMB, "Discard write access to a directory\n");2075	}2076 2077	if (access & FILE_READ_DESIRED_ACCESS_LE &&2078	    access & FILE_WRITE_DESIRE_ACCESS_LE) {2079		oflags |= O_RDWR;2080		*may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;2081	} else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {2082		oflags |= O_WRONLY;2083		*may_flags = MAY_OPEN | MAY_WRITE;2084	} else {2085		oflags |= O_RDONLY;2086		*may_flags = MAY_OPEN | MAY_READ;2087	}2088 2089	if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode))2090		oflags |= O_PATH;2091 2092	if (file_present) {2093		switch (disposition & FILE_CREATE_MASK_LE) {2094		case FILE_OPEN_LE:2095		case FILE_CREATE_LE:2096			break;2097		case FILE_SUPERSEDE_LE:2098		case FILE_OVERWRITE_LE:2099		case FILE_OVERWRITE_IF_LE:2100			oflags |= O_TRUNC;2101			break;2102		default:2103			break;2104		}2105	} else {2106		switch (disposition & FILE_CREATE_MASK_LE) {2107		case FILE_SUPERSEDE_LE:2108		case FILE_CREATE_LE:2109		case FILE_OPEN_IF_LE:2110		case FILE_OVERWRITE_IF_LE:2111			oflags |= O_CREAT;2112			break;2113		case FILE_OPEN_LE:2114		case FILE_OVERWRITE_LE:2115			oflags &= ~O_CREAT;2116			break;2117		default:2118			break;2119		}2120	}2121 2122	return oflags;2123}2124 2125/**2126 * smb2_tree_disconnect() - handler for smb tree connect request2127 * @work:	smb work containing request buffer2128 *2129 * Return:      02130 */2131int smb2_tree_disconnect(struct ksmbd_work *work)2132{2133	struct smb2_tree_disconnect_rsp *rsp;2134	struct smb2_tree_disconnect_req *req;2135	struct ksmbd_session *sess = work->sess;2136	struct ksmbd_tree_connect *tcon = work->tcon;2137	int err;2138 2139	WORK_BUFFERS(work, req, rsp);2140 2141	ksmbd_debug(SMB, "request\n");2142 2143	if (!tcon) {2144		ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);2145 2146		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;2147		err = -ENOENT;2148		goto err_out;2149	}2150 2151	ksmbd_close_tree_conn_fds(work);2152 2153	write_lock(&sess->tree_conns_lock);2154	if (tcon->t_state == TREE_DISCONNECTED) {2155		write_unlock(&sess->tree_conns_lock);2156		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;2157		err = -ENOENT;2158		goto err_out;2159	}2160 2161	WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));2162	tcon->t_state = TREE_DISCONNECTED;2163	write_unlock(&sess->tree_conns_lock);2164 2165	err = ksmbd_tree_conn_disconnect(sess, tcon);2166	if (err) {2167		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;2168		goto err_out;2169	}2170 2171	work->tcon = NULL;2172 2173	rsp->StructureSize = cpu_to_le16(4);2174	err = ksmbd_iov_pin_rsp(work, rsp,2175				sizeof(struct smb2_tree_disconnect_rsp));2176	if (err) {2177		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;2178		goto err_out;2179	}2180 2181	return 0;2182 2183err_out:2184	smb2_set_err_rsp(work);2185	return err;2186 2187}2188 2189/**2190 * smb2_session_logoff() - handler for session log off request2191 * @work:	smb work containing request buffer2192 *2193 * Return:      02194 */2195int smb2_session_logoff(struct ksmbd_work *work)2196{2197	struct ksmbd_conn *conn = work->conn;2198	struct smb2_logoff_req *req;2199	struct smb2_logoff_rsp *rsp;2200	struct ksmbd_session *sess;2201	u64 sess_id;2202	int err;2203 2204	WORK_BUFFERS(work, req, rsp);2205 2206	ksmbd_debug(SMB, "request\n");2207 2208	ksmbd_conn_lock(conn);2209	if (!ksmbd_conn_good(conn)) {2210		ksmbd_conn_unlock(conn);2211		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;2212		smb2_set_err_rsp(work);2213		return -ENOENT;2214	}2215	sess_id = le64_to_cpu(req->hdr.SessionId);2216	ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);2217	ksmbd_conn_unlock(conn);2218 2219	ksmbd_close_session_fds(work);2220	ksmbd_conn_wait_idle(conn);2221 2222	/*2223	 * Re-lookup session to validate if session is deleted2224	 * while waiting request complete2225	 */2226	sess = ksmbd_session_lookup_all(conn, sess_id);2227	if (ksmbd_tree_conn_session_logoff(sess)) {2228		ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);2229		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;2230		smb2_set_err_rsp(work);2231		return -ENOENT;2232	}2233 2234	ksmbd_destroy_file_table(&sess->file_table);2235	down_write(&conn->session_lock);2236	sess->state = SMB2_SESSION_EXPIRED;2237	up_write(&conn->session_lock);2238 2239	ksmbd_free_user(sess->user);2240	sess->user = NULL;2241	ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);2242 2243	rsp->StructureSize = cpu_to_le16(4);2244	err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));2245	if (err) {2246		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;2247		smb2_set_err_rsp(work);2248		return err;2249	}2250	return 0;2251}2252 2253/**2254 * create_smb2_pipe() - create IPC pipe2255 * @work:	smb work containing request buffer2256 *2257 * Return:      0 on success, otherwise error2258 */2259static noinline int create_smb2_pipe(struct ksmbd_work *work)2260{2261	struct smb2_create_rsp *rsp;2262	struct smb2_create_req *req;2263	int id;2264	int err;2265	char *name;2266 2267	WORK_BUFFERS(work, req, rsp);2268 2269	name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),2270				      1, work->conn->local_nls);2271	if (IS_ERR(name)) {2272		rsp->hdr.Status = STATUS_NO_MEMORY;2273		err = PTR_ERR(name);2274		goto out;2275	}2276 2277	id = ksmbd_session_rpc_open(work->sess, name);2278	if (id < 0) {2279		pr_err("Unable to open RPC pipe: %d\n", id);2280		err = id;2281		goto out;2282	}2283 2284	rsp->hdr.Status = STATUS_SUCCESS;2285	rsp->StructureSize = cpu_to_le16(89);2286	rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;2287	rsp->Flags = 0;2288	rsp->CreateAction = cpu_to_le32(FILE_OPENED);2289 2290	rsp->CreationTime = cpu_to_le64(0);2291	rsp->LastAccessTime = cpu_to_le64(0);2292	rsp->ChangeTime = cpu_to_le64(0);2293	rsp->AllocationSize = cpu_to_le64(0);2294	rsp->EndofFile = cpu_to_le64(0);2295	rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;2296	rsp->Reserved2 = 0;2297	rsp->VolatileFileId = id;2298	rsp->PersistentFileId = 0;2299	rsp->CreateContextsOffset = 0;2300	rsp->CreateContextsLength = 0;2301 2302	err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));2303	if (err)2304		goto out;2305 2306	kfree(name);2307	return 0;2308 2309out:2310	switch (err) {2311	case -EINVAL:2312		rsp->hdr.Status = STATUS_INVALID_PARAMETER;2313		break;2314	case -ENOSPC:2315	case -ENOMEM:2316		rsp->hdr.Status = STATUS_NO_MEMORY;2317		break;2318	}2319 2320	if (!IS_ERR(name))2321		kfree(name);2322 2323	smb2_set_err_rsp(work);2324	return err;2325}2326 2327/**2328 * smb2_set_ea() - handler for setting extended attributes using set2329 *		info command2330 * @eabuf:	set info command buffer2331 * @buf_len:	set info command buffer length2332 * @path:	dentry path for get ea2333 * @get_write:	get write access to a mount2334 *2335 * Return:	0 on success, otherwise error2336 */2337static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,2338		       const struct path *path, bool get_write)2339{2340	struct mnt_idmap *idmap = mnt_idmap(path->mnt);2341	char *attr_name = NULL, *value;2342	int rc = 0;2343	unsigned int next = 0;2344 2345	if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +2346			le16_to_cpu(eabuf->EaValueLength))2347		return -EINVAL;2348 2349	attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);2350	if (!attr_name)2351		return -ENOMEM;2352 2353	do {2354		if (!eabuf->EaNameLength)2355			goto next;2356 2357		ksmbd_debug(SMB,2358			    "name : <%s>, name_len : %u, value_len : %u, next : %u\n",2359			    eabuf->name, eabuf->EaNameLength,2360			    le16_to_cpu(eabuf->EaValueLength),2361			    le32_to_cpu(eabuf->NextEntryOffset));2362 2363		if (eabuf->EaNameLength >2364		    (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {2365			rc = -EINVAL;2366			break;2367		}2368 2369		memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);2370		memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,2371		       eabuf->EaNameLength);2372		attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';2373		value = (char *)&eabuf->name + eabuf->EaNameLength + 1;2374 2375		if (!eabuf->EaValueLength) {2376			rc = ksmbd_vfs_casexattr_len(idmap,2377						     path->dentry,2378						     attr_name,2379						     XATTR_USER_PREFIX_LEN +2380						     eabuf->EaNameLength);2381 2382			/* delete the EA only when it exits */2383			if (rc > 0) {2384				rc = ksmbd_vfs_remove_xattr(idmap,2385							    path,2386							    attr_name,2387							    get_write);2388 2389				if (rc < 0) {2390					ksmbd_debug(SMB,2391						    "remove xattr failed(%d)\n",2392						    rc);2393					break;2394				}2395			}2396 2397			/* if the EA doesn't exist, just do nothing. */2398			rc = 0;2399		} else {2400			rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,2401						le16_to_cpu(eabuf->EaValueLength),2402						0, get_write);2403			if (rc < 0) {2404				ksmbd_debug(SMB,2405					    "ksmbd_vfs_setxattr is failed(%d)\n",2406					    rc);2407				break;2408			}2409		}2410 2411next:2412		next = le32_to_cpu(eabuf->NextEntryOffset);2413		if (next == 0 || buf_len < next)2414			break;2415		buf_len -= next;2416		eabuf = (struct smb2_ea_info *)((char *)eabuf + next);2417		if (buf_len < sizeof(struct smb2_ea_info)) {2418			rc = -EINVAL;2419			break;2420		}2421 2422		if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +2423				le16_to_cpu(eabuf->EaValueLength)) {2424			rc = -EINVAL;2425			break;2426		}2427	} while (next != 0);2428 2429	kfree(attr_name);2430	return rc;2431}2432 2433static noinline int smb2_set_stream_name_xattr(const struct path *path,2434					       struct ksmbd_file *fp,2435					       char *stream_name, int s_type)2436{2437	struct mnt_idmap *idmap = mnt_idmap(path->mnt);2438	size_t xattr_stream_size;2439	char *xattr_stream_name;2440	int rc;2441 2442	rc = ksmbd_vfs_xattr_stream_name(stream_name,2443					 &xattr_stream_name,2444					 &xattr_stream_size,2445					 s_type);2446	if (rc)2447		return rc;2448 2449	fp->stream.name = xattr_stream_name;2450	fp->stream.size = xattr_stream_size;2451 2452	/* Check if there is stream prefix in xattr space */2453	rc = ksmbd_vfs_casexattr_len(idmap,2454				     path->dentry,2455				     xattr_stream_name,2456				     xattr_stream_size);2457	if (rc >= 0)2458		return 0;2459 2460	if (fp->cdoption == FILE_OPEN_LE) {2461		ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);2462		return -EBADF;2463	}2464 2465	rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);2466	if (rc < 0)2467		pr_err("Failed to store XATTR stream name :%d\n", rc);2468	return 0;2469}2470 2471static int smb2_remove_smb_xattrs(const struct path *path)2472{2473	struct mnt_idmap *idmap = mnt_idmap(path->mnt);2474	char *name, *xattr_list = NULL;2475	ssize_t xattr_list_len;2476	int err = 0;2477 2478	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);2479	if (xattr_list_len < 0) {2480		goto out;2481	} else if (!xattr_list_len) {2482		ksmbd_debug(SMB, "empty xattr in the file\n");2483		goto out;2484	}2485 2486	for (name = xattr_list; name - xattr_list < xattr_list_len;2487			name += strlen(name) + 1) {2488		ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));2489 2490		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&2491		    !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,2492			     STREAM_PREFIX_LEN)) {2493			err = ksmbd_vfs_remove_xattr(idmap, path,2494						     name, true);2495			if (err)2496				ksmbd_debug(SMB, "remove xattr failed : %s\n",2497					    name);2498		}2499	}2500out:2501	kvfree(xattr_list);2502	return err;2503}2504 2505static int smb2_create_truncate(const struct path *path)2506{2507	int rc = vfs_truncate(path, 0);2508 2509	if (rc) {2510		pr_err("vfs_truncate failed, rc %d\n", rc);2511		return rc;2512	}2513 2514	rc = smb2_remove_smb_xattrs(path);2515	if (rc == -EOPNOTSUPP)2516		rc = 0;2517	if (rc)2518		ksmbd_debug(SMB,2519			    "ksmbd_truncate_stream_name_xattr failed, rc %d\n",2520			    rc);2521	return rc;2522}2523 2524static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,2525			    struct ksmbd_file *fp)2526{2527	struct xattr_dos_attrib da = {0};2528	int rc;2529 2530	if (!test_share_config_flag(tcon->share_conf,2531				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))2532		return;2533 2534	da.version = 4;2535	da.attr = le32_to_cpu(fp->f_ci->m_fattr);2536	da.itime = da.create_time = fp->create_time;2537	da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |2538		XATTR_DOSINFO_ITIME;2539 2540	rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);2541	if (rc)2542		ksmbd_debug(SMB, "failed to store file attribute into xattr\n");2543}2544 2545static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,2546			       const struct path *path, struct ksmbd_file *fp)2547{2548	struct xattr_dos_attrib da;2549	int rc;2550 2551	fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);2552 2553	/* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */2554	if (!test_share_config_flag(tcon->share_conf,2555				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))2556		return;2557 2558	rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),2559					    path->dentry, &da);2560	if (rc > 0) {2561		fp->f_ci->m_fattr = cpu_to_le32(da.attr);2562		fp->create_time = da.create_time;2563		fp->itime = da.itime;2564	}2565}2566 2567static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,2568		      struct path *path, char *name, int open_flags,2569		      umode_t posix_mode, bool is_dir)2570{2571	struct ksmbd_tree_connect *tcon = work->tcon;2572	struct ksmbd_share_config *share = tcon->share_conf;2573	umode_t mode;2574	int rc;2575 2576	if (!(open_flags & O_CREAT))2577		return -EBADF;2578 2579	ksmbd_debug(SMB, "file does not exist, so creating\n");2580	if (is_dir == true) {2581		ksmbd_debug(SMB, "creating directory\n");2582 2583		mode = share_config_directory_mode(share, posix_mode);2584		rc = ksmbd_vfs_mkdir(work, name, mode);2585		if (rc)2586			return rc;2587	} else {2588		ksmbd_debug(SMB, "creating regular file\n");2589 2590		mode = share_config_create_mode(share, posix_mode);2591		rc = ksmbd_vfs_create(work, name, mode);2592		if (rc)2593			return rc;2594	}2595 2596	rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);2597	if (rc) {2598		pr_err("cannot get linux path (%s), err = %d\n",2599		       name, rc);2600		return rc;2601	}2602	return 0;2603}2604 2605static int smb2_create_sd_buffer(struct ksmbd_work *work,2606				 struct smb2_create_req *req,2607				 const struct path *path)2608{2609	struct create_context *context;2610	struct create_sd_buf_req *sd_buf;2611 2612	if (!req->CreateContextsOffset)2613		return -ENOENT;2614 2615	/* Parse SD BUFFER create contexts */2616	context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);2617	if (!context)2618		return -ENOENT;2619	else if (IS_ERR(context))2620		return PTR_ERR(context);2621 2622	ksmbd_debug(SMB,2623		    "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");2624	sd_buf = (struct create_sd_buf_req *)context;2625	if (le16_to_cpu(context->DataOffset) +2626	    le32_to_cpu(context->DataLength) <2627	    sizeof(struct create_sd_buf_req))2628		return -EINVAL;2629	return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,2630			    le32_to_cpu(sd_buf->ccontext.DataLength), true, false);2631}2632 2633static void ksmbd_acls_fattr(struct smb_fattr *fattr,2634			     struct mnt_idmap *idmap,2635			     struct inode *inode)2636{2637	vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);2638	vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);2639 2640	fattr->cf_uid = vfsuid_into_kuid(vfsuid);2641	fattr->cf_gid = vfsgid_into_kgid(vfsgid);2642	fattr->cf_mode = inode->i_mode;2643	fattr->cf_acls = NULL;2644	fattr->cf_dacls = NULL;2645 2646	if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {2647		fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);2648		if (S_ISDIR(inode->i_mode))2649			fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);2650	}2651}2652 2653enum {2654	DURABLE_RECONN_V2 = 1,2655	DURABLE_RECONN,2656	DURABLE_REQ_V2,2657	DURABLE_REQ,2658};2659 2660struct durable_info {2661	struct ksmbd_file *fp;2662	unsigned short int type;2663	bool persistent;2664	bool reconnected;2665	unsigned int timeout;2666	char *CreateGuid;2667};2668 2669static int parse_durable_handle_context(struct ksmbd_work *work,2670					struct smb2_create_req *req,2671					struct lease_ctx_info *lc,2672					struct durable_info *dh_info)2673{2674	struct ksmbd_conn *conn = work->conn;2675	struct create_context *context;2676	int dh_idx, err = 0;2677	u64 persistent_id = 0;2678	int req_op_level;2679	static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"};2680 2681	req_op_level = req->RequestedOplockLevel;2682	for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr);2683	     dh_idx++) {2684		context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4);2685		if (IS_ERR(context)) {2686			err = PTR_ERR(context);2687			goto out;2688		}2689		if (!context)2690			continue;2691 2692		switch (dh_idx) {2693		case DURABLE_RECONN_V2:2694		{2695			struct create_durable_reconn_v2_req *recon_v2;2696 2697			if (dh_info->type == DURABLE_RECONN ||2698			    dh_info->type == DURABLE_REQ_V2) {2699				err = -EINVAL;2700				goto out;2701			}2702 2703			recon_v2 = (struct create_durable_reconn_v2_req *)context;2704			persistent_id = recon_v2->Fid.PersistentFileId;2705			dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);2706			if (!dh_info->fp) {2707				ksmbd_debug(SMB, "Failed to get durable handle state\n");2708				err = -EBADF;2709				goto out;2710			}2711 2712			if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid,2713				   SMB2_CREATE_GUID_SIZE)) {2714				err = -EBADF;2715				ksmbd_put_durable_fd(dh_info->fp);2716				goto out;2717			}2718 2719			dh_info->type = dh_idx;2720			dh_info->reconnected = true;2721			ksmbd_debug(SMB,2722				"reconnect v2 Persistent-id from reconnect = %llu\n",2723					persistent_id);2724			break;2725		}2726		case DURABLE_RECONN:2727		{2728			struct create_durable_reconn_req *recon;2729 2730			if (dh_info->type == DURABLE_RECONN_V2 ||2731			    dh_info->type == DURABLE_REQ_V2) {2732				err = -EINVAL;2733				goto out;2734			}2735 2736			recon = (struct create_durable_reconn_req *)context;2737			persistent_id = recon->Data.Fid.PersistentFileId;2738			dh_info->fp = ksmbd_lookup_durable_fd(persistent_id);2739			if (!dh_info->fp) {2740				ksmbd_debug(SMB, "Failed to get durable handle state\n");2741				err = -EBADF;2742				goto out;2743			}2744 2745			dh_info->type = dh_idx;2746			dh_info->reconnected = true;2747			ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n",2748				    persistent_id);2749			break;2750		}2751		case DURABLE_REQ_V2:2752		{2753			struct create_durable_req_v2 *durable_v2_blob;2754 2755			if (dh_info->type == DURABLE_RECONN ||2756			    dh_info->type == DURABLE_RECONN_V2) {2757				err = -EINVAL;2758				goto out;2759			}2760 2761			durable_v2_blob =2762				(struct create_durable_req_v2 *)context;2763			ksmbd_debug(SMB, "Request for durable v2 open\n");2764			dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid);2765			if (dh_info->fp) {2766				if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid,2767					    SMB2_CLIENT_GUID_SIZE)) {2768					if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) {2769						err = -ENOEXEC;2770						goto out;2771					}2772 2773					dh_info->fp->conn = conn;2774					dh_info->reconnected = true;2775					goto out;2776				}2777			}2778 2779			if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||2780			    req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {2781				dh_info->CreateGuid =2782					durable_v2_blob->CreateGuid;2783				dh_info->persistent =2784					le32_to_cpu(durable_v2_blob->Flags);2785				dh_info->timeout =2786					le32_to_cpu(durable_v2_blob->Timeout);2787				dh_info->type = dh_idx;2788			}2789			break;2790		}2791		case DURABLE_REQ:2792			if (dh_info->type == DURABLE_RECONN)2793				goto out;2794			if (dh_info->type == DURABLE_RECONN_V2 ||2795			    dh_info->type == DURABLE_REQ_V2) {2796				err = -EINVAL;2797				goto out;2798			}2799 2800			if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) ||2801			    req_op_level == SMB2_OPLOCK_LEVEL_BATCH) {2802				ksmbd_debug(SMB, "Request for durable open\n");2803				dh_info->type = dh_idx;2804			}2805		}2806	}2807 2808out:2809	return err;2810}2811 2812/**2813 * smb2_open() - handler for smb file open request2814 * @work:	smb work containing request buffer2815 *2816 * Return:      0 on success, otherwise error2817 */2818int smb2_open(struct ksmbd_work *work)2819{2820	struct ksmbd_conn *conn = work->conn;2821	struct ksmbd_session *sess = work->sess;2822	struct ksmbd_tree_connect *tcon = work->tcon;2823	struct smb2_create_req *req;2824	struct smb2_create_rsp *rsp;2825	struct path path, parent_path;2826	struct ksmbd_share_config *share = tcon->share_conf;2827	struct ksmbd_file *fp = NULL;2828	struct file *filp = NULL;2829	struct mnt_idmap *idmap = NULL;2830	struct kstat stat;2831	struct create_context *context;2832	struct lease_ctx_info *lc = NULL;2833	struct create_ea_buf_req *ea_buf = NULL;2834	struct oplock_info *opinfo;2835	struct durable_info dh_info = {0};2836	__le32 *next_ptr = NULL;2837	int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;2838	int rc = 0;2839	int contxt_cnt = 0, query_disk_id = 0;2840	int maximal_access_ctxt = 0, posix_ctxt = 0;2841	int s_type = 0;2842	int next_off = 0;2843	char *name = NULL;2844	char *stream_name = NULL;2845	bool file_present = false, created = false, already_permitted = false;2846	int share_ret, need_truncate = 0;2847	u64 time;2848	umode_t posix_mode = 0;2849	__le32 daccess, maximal_access = 0;2850	int iov_len = 0;2851 2852	WORK_BUFFERS(work, req, rsp);2853 2854	if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&2855	    (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {2856		ksmbd_debug(SMB, "invalid flag in chained command\n");2857		rsp->hdr.Status = STATUS_INVALID_PARAMETER;2858		smb2_set_err_rsp(work);2859		return -EINVAL;2860	}2861 2862	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {2863		ksmbd_debug(SMB, "IPC pipe create request\n");2864		return create_smb2_pipe(work);2865	}2866 2867	if (req->NameLength) {2868		name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset),2869				     le16_to_cpu(req->NameLength),2870				     work->conn->local_nls);2871		if (IS_ERR(name)) {2872			rc = PTR_ERR(name);2873			name = NULL;2874			goto err_out2;2875		}2876 2877		ksmbd_debug(SMB, "converted name = %s\n", name);2878		if (strchr(name, ':')) {2879			if (!test_share_config_flag(work->tcon->share_conf,2880						    KSMBD_SHARE_FLAG_STREAMS)) {2881				rc = -EBADF;2882				goto err_out2;2883			}2884			rc = parse_stream_name(name, &stream_name, &s_type);2885			if (rc < 0)2886				goto err_out2;2887		}2888 2889		rc = ksmbd_validate_filename(name);2890		if (rc < 0)2891			goto err_out2;2892 2893		if (ksmbd_share_veto_filename(share, name)) {2894			rc = -ENOENT;2895			ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",2896				    name);2897			goto err_out2;2898		}2899	} else {2900		name = kstrdup("", GFP_KERNEL);2901		if (!name) {2902			rc = -ENOMEM;2903			goto err_out2;2904		}2905	}2906 2907	req_op_level = req->RequestedOplockLevel;2908 2909	if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&2910	    req->CreateContextsOffset) {2911		lc = parse_lease_state(req);2912		rc = parse_durable_handle_context(work, req, lc, &dh_info);2913		if (rc) {2914			ksmbd_debug(SMB, "error parsing durable handle context\n");2915			goto err_out2;2916		}2917 2918		if (dh_info.reconnected == true) {2919			rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name);2920			if (rc) {2921				ksmbd_put_durable_fd(dh_info.fp);2922				goto err_out2;2923			}2924 2925			rc = ksmbd_reopen_durable_fd(work, dh_info.fp);2926			if (rc) {2927				ksmbd_put_durable_fd(dh_info.fp);2928				goto err_out2;2929			}2930 2931			if (ksmbd_override_fsids(work)) {2932				rc = -ENOMEM;2933				ksmbd_put_durable_fd(dh_info.fp);2934				goto err_out2;2935			}2936 2937			fp = dh_info.fp;2938			file_info = FILE_OPENED;2939 2940			rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat);2941			if (rc)2942				goto err_out2;2943 2944			ksmbd_put_durable_fd(fp);2945			goto reconnected_fp;2946		}2947	} else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)2948		lc = parse_lease_state(req);2949 2950	if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {2951		pr_err("Invalid impersonationlevel : 0x%x\n",2952		       le32_to_cpu(req->ImpersonationLevel));2953		rc = -EIO;2954		rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;2955		goto err_out2;2956	}2957 2958	if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {2959		pr_err("Invalid create options : 0x%x\n",2960		       le32_to_cpu(req->CreateOptions));2961		rc = -EINVAL;2962		goto err_out2;2963	} else {2964		if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&2965		    req->CreateOptions & FILE_RANDOM_ACCESS_LE)2966			req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);2967 2968		if (req->CreateOptions &2969		    (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |2970		     FILE_RESERVE_OPFILTER_LE)) {2971			rc = -EOPNOTSUPP;2972			goto err_out2;2973		}2974 2975		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {2976			if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {2977				rc = -EINVAL;2978				goto err_out2;2979			} else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {2980				req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);2981			}2982		}2983	}2984 2985	if (le32_to_cpu(req->CreateDisposition) >2986	    le32_to_cpu(FILE_OVERWRITE_IF_LE)) {2987		pr_err("Invalid create disposition : 0x%x\n",2988		       le32_to_cpu(req->CreateDisposition));2989		rc = -EINVAL;2990		goto err_out2;2991	}2992 2993	if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {2994		pr_err("Invalid desired access : 0x%x\n",2995		       le32_to_cpu(req->DesiredAccess));2996		rc = -EACCES;2997		goto err_out2;2998	}2999 3000	if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {3001		pr_err("Invalid file attribute : 0x%x\n",3002		       le32_to_cpu(req->FileAttributes));3003		rc = -EINVAL;3004		goto err_out2;3005	}3006 3007	if (req->CreateContextsOffset) {3008		/* Parse non-durable handle create contexts */3009		context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);3010		if (IS_ERR(context)) {3011			rc = PTR_ERR(context);3012			goto err_out2;3013		} else if (context) {3014			ea_buf = (struct create_ea_buf_req *)context;3015			if (le16_to_cpu(context->DataOffset) +3016			    le32_to_cpu(context->DataLength) <3017			    sizeof(struct create_ea_buf_req)) {3018				rc = -EINVAL;3019				goto err_out2;3020			}3021			if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {3022				rsp->hdr.Status = STATUS_ACCESS_DENIED;3023				rc = -EACCES;3024				goto err_out2;3025			}3026		}3027 3028		context = smb2_find_context_vals(req,3029						 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);3030		if (IS_ERR(context)) {3031			rc = PTR_ERR(context);3032			goto err_out2;3033		} else if (context) {3034			ksmbd_debug(SMB,3035				    "get query maximal access context\n");3036			maximal_access_ctxt = 1;3037		}3038 3039		context = smb2_find_context_vals(req,3040						 SMB2_CREATE_TIMEWARP_REQUEST, 4);3041		if (IS_ERR(context)) {3042			rc = PTR_ERR(context);3043			goto err_out2;3044		} else if (context) {3045			ksmbd_debug(SMB, "get timewarp context\n");3046			rc = -EBADF;3047			goto err_out2;3048		}3049 3050		if (tcon->posix_extensions) {3051			context = smb2_find_context_vals(req,3052							 SMB2_CREATE_TAG_POSIX, 16);3053			if (IS_ERR(context)) {3054				rc = PTR_ERR(context);3055				goto err_out2;3056			} else if (context) {3057				struct create_posix *posix =3058					(struct create_posix *)context;3059				if (le16_to_cpu(context->DataOffset) +3060				    le32_to_cpu(context->DataLength) <3061				    sizeof(struct create_posix) - 4) {3062					rc = -EINVAL;3063					goto err_out2;3064				}3065				ksmbd_debug(SMB, "get posix context\n");3066 3067				posix_mode = le32_to_cpu(posix->Mode);3068				posix_ctxt = 1;3069			}3070		}3071	}3072 3073	if (ksmbd_override_fsids(work)) {3074		rc = -ENOMEM;3075		goto err_out2;3076	}3077 3078	rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,3079					&parent_path, &path, 1);3080	if (!rc) {3081		file_present = true;3082 3083		if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {3084			/*3085			 * If file exists with under flags, return access3086			 * denied error.3087			 */3088			if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||3089			    req->CreateDisposition == FILE_OPEN_IF_LE) {3090				rc = -EACCES;3091				goto err_out;3092			}3093 3094			if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {3095				ksmbd_debug(SMB,3096					    "User does not have write permission\n");3097				rc = -EACCES;3098				goto err_out;3099			}3100		} else if (d_is_symlink(path.dentry)) {3101			rc = -EACCES;3102			goto err_out;3103		}3104 3105		idmap = mnt_idmap(path.mnt);3106	} else {3107		if (rc != -ENOENT)3108			goto err_out;3109		ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",3110			    name, rc);3111		rc = 0;3112	}3113 3114	if (stream_name) {3115		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {3116			if (s_type == DATA_STREAM) {3117				rc = -EIO;3118				rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;3119			}3120		} else {3121			if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&3122			    s_type == DATA_STREAM) {3123				rc = -EIO;3124				rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;3125			}3126		}3127 3128		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&3129		    req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {3130			rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;3131			rc = -EIO;3132		}3133 3134		if (rc < 0)3135			goto err_out;3136	}3137 3138	if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&3139	    S_ISDIR(d_inode(path.dentry)->i_mode) &&3140	    !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {3141		ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",3142			    name, req->CreateOptions);3143		rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;3144		rc = -EIO;3145		goto err_out;3146	}3147 3148	if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&3149	    !(req->CreateDisposition == FILE_CREATE_LE) &&3150	    !S_ISDIR(d_inode(path.dentry)->i_mode)) {3151		rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;3152		rc = -EIO;3153		goto err_out;3154	}3155 3156	if (!stream_name && file_present &&3157	    req->CreateDisposition == FILE_CREATE_LE) {3158		rc = -EEXIST;3159		goto err_out;3160	}3161 3162	daccess = smb_map_generic_desired_access(req->DesiredAccess);3163 3164	if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {3165		rc = smb_check_perm_dacl(conn, &path, &daccess,3166					 sess->user->uid);3167		if (rc)3168			goto err_out;3169	}3170 3171	if (daccess & FILE_MAXIMAL_ACCESS_LE) {3172		if (!file_present) {3173			daccess = cpu_to_le32(GENERIC_ALL_FLAGS);3174		} else {3175			ksmbd_vfs_query_maximal_access(idmap,3176							    path.dentry,3177							    &daccess);3178			already_permitted = true;3179		}3180		maximal_access = daccess;3181	}3182 3183	open_flags = smb2_create_open_flags(file_present, daccess,3184					    req->CreateDisposition,3185					    &may_flags,3186					    req->CreateOptions,3187					    file_present ? d_inode(path.dentry)->i_mode : 0);3188 3189	if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {3190		if (open_flags & (O_CREAT | O_TRUNC)) {3191			ksmbd_debug(SMB,3192				    "User does not have write permission\n");3193			rc = -EACCES;3194			goto err_out;3195		}3196	}3197 3198	/*create file if not present */3199	if (!file_present) {3200		rc = smb2_creat(work, &parent_path, &path, name, open_flags,3201				posix_mode,3202				req->CreateOptions & FILE_DIRECTORY_FILE_LE);3203		if (rc) {3204			if (rc == -ENOENT) {3205				rc = -EIO;3206				rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;3207			}3208			goto err_out;3209		}3210 3211		created = true;3212		idmap = mnt_idmap(path.mnt);3213		if (ea_buf) {3214			if (le32_to_cpu(ea_buf->ccontext.DataLength) <3215			    sizeof(struct smb2_ea_info)) {3216				rc = -EINVAL;3217				goto err_out;3218			}3219 3220			rc = smb2_set_ea(&ea_buf->ea,3221					 le32_to_cpu(ea_buf->ccontext.DataLength),3222					 &path, false);3223			if (rc == -EOPNOTSUPP)3224				rc = 0;3225			else if (rc)3226				goto err_out;3227		}3228	} else if (!already_permitted) {3229		/* FILE_READ_ATTRIBUTE is allowed without inode_permission,3230		 * because execute(search) permission on a parent directory,3231		 * is already granted.3232		 */3233		if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {3234			rc = inode_permission(idmap,3235					      d_inode(path.dentry),3236					      may_flags);3237			if (rc)3238				goto err_out;3239 3240			if ((daccess & FILE_DELETE_LE) ||3241			    (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {3242				rc = inode_permission(idmap,3243						      d_inode(path.dentry->d_parent),3244						      MAY_EXEC | MAY_WRITE);3245				if (rc)3246					goto err_out;3247			}3248		}3249	}3250 3251	rc = ksmbd_query_inode_status(path.dentry->d_parent);3252	if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {3253		rc = -EBUSY;3254		goto err_out;3255	}3256 3257	rc = 0;3258	filp = dentry_open(&path, open_flags, current_cred());3259	if (IS_ERR(filp)) {3260		rc = PTR_ERR(filp);3261		pr_err("dentry open for dir failed, rc %d\n", rc);3262		goto err_out;3263	}3264 3265	if (file_present) {3266		if (!(open_flags & O_TRUNC))3267			file_info = FILE_OPENED;3268		else3269			file_info = FILE_OVERWRITTEN;3270 3271		if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==3272		    FILE_SUPERSEDE_LE)3273			file_info = FILE_SUPERSEDED;3274	} else if (open_flags & O_CREAT) {3275		file_info = FILE_CREATED;3276	}3277 3278	ksmbd_vfs_set_fadvise(filp, req->CreateOptions);3279 3280	/* Obtain Volatile-ID */3281	fp = ksmbd_open_fd(work, filp);3282	if (IS_ERR(fp)) {3283		fput(filp);3284		rc = PTR_ERR(fp);3285		fp = NULL;3286		goto err_out;3287	}3288 3289	/* Get Persistent-ID */3290	ksmbd_open_durable_fd(fp);3291	if (!has_file_id(fp->persistent_id)) {3292		rc = -ENOMEM;3293		goto err_out;3294	}3295 3296	fp->cdoption = req->CreateDisposition;3297	fp->daccess = daccess;3298	fp->saccess = req->ShareAccess;3299	fp->coption = req->CreateOptions;3300 3301	/* Set default windows and posix acls if creating new file */3302	if (created) {3303		int posix_acl_rc;3304		struct inode *inode = d_inode(path.dentry);3305 3306		posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,3307							   &path,3308							   d_inode(path.dentry->d_parent));3309		if (posix_acl_rc)3310			ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);3311 3312		if (test_share_config_flag(work->tcon->share_conf,3313					   KSMBD_SHARE_FLAG_ACL_XATTR)) {3314			rc = smb_inherit_dacl(conn, &path, sess->user->uid,3315					      sess->user->gid);3316		}3317 3318		if (rc) {3319			rc = smb2_create_sd_buffer(work, req, &path);3320			if (rc) {3321				if (posix_acl_rc)3322					ksmbd_vfs_set_init_posix_acl(idmap,3323								     &path);3324 3325				if (test_share_config_flag(work->tcon->share_conf,3326							   KSMBD_SHARE_FLAG_ACL_XATTR)) {3327					struct smb_fattr fattr;3328					struct smb_ntsd *pntsd;3329					int pntsd_size, ace_num = 0;3330 3331					ksmbd_acls_fattr(&fattr, idmap, inode);3332					if (fattr.cf_acls)3333						ace_num = fattr.cf_acls->a_count;3334					if (fattr.cf_dacls)3335						ace_num += fattr.cf_dacls->a_count;3336 3337					pntsd = kmalloc(sizeof(struct smb_ntsd) +3338							sizeof(struct smb_sid) * 3 +3339							sizeof(struct smb_acl) +3340							sizeof(struct smb_ace) * ace_num * 2,3341							GFP_KERNEL);3342					if (!pntsd) {3343						posix_acl_release(fattr.cf_acls);3344						posix_acl_release(fattr.cf_dacls);3345						goto err_out;3346					}3347 3348					rc = build_sec_desc(idmap,3349							    pntsd, NULL, 0,3350							    OWNER_SECINFO |3351							    GROUP_SECINFO |3352							    DACL_SECINFO,3353							    &pntsd_size, &fattr);3354					posix_acl_release(fattr.cf_acls);3355					posix_acl_release(fattr.cf_dacls);3356					if (rc) {3357						kfree(pntsd);3358						goto err_out;3359					}3360 3361					rc = ksmbd_vfs_set_sd_xattr(conn,3362								    idmap,3363								    &path,3364								    pntsd,3365								    pntsd_size,3366								    false);3367					kfree(pntsd);3368					if (rc)3369						pr_err("failed to store ntacl in xattr : %d\n",3370						       rc);3371				}3372			}3373		}3374		rc = 0;3375	}3376 3377	if (stream_name) {3378		rc = smb2_set_stream_name_xattr(&path,3379						fp,3380						stream_name,3381						s_type);3382		if (rc)3383			goto err_out;3384		file_info = FILE_CREATED;3385	}3386 3387	fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |3388			FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));3389 3390	/* fp should be searchable through ksmbd_inode.m_fp_list3391	 * after daccess, saccess, attrib_only, and stream are3392	 * initialized.3393	 */3394	down_write(&fp->f_ci->m_lock);3395	list_add(&fp->node, &fp->f_ci->m_fp_list);3396	up_write(&fp->f_ci->m_lock);3397 3398	/* Check delete pending among previous fp before oplock break */3399	if (ksmbd_inode_pending_delete(fp)) {3400		rc = -EBUSY;3401		goto err_out;3402	}3403 3404	if (file_present || created)3405		ksmbd_vfs_kern_path_unlock(&parent_path, &path);3406 3407	if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&3408	    !fp->attrib_only && !stream_name) {3409		smb_break_all_oplock(work, fp);3410		need_truncate = 1;3411	}3412 3413	share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);3414	if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||3415	    (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&3416	     !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {3417		if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {3418			rc = share_ret;3419			goto err_out1;3420		}3421	} else {3422		if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) {3423			if (S_ISDIR(file_inode(filp)->i_mode)) {3424				lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE;3425				lc->is_dir = true;3426			}3427 3428			/*3429			 * Compare parent lease using parent key. If there is no3430			 * a lease that has same parent key, Send lease break3431			 * notification.3432			 */3433			smb_send_parent_lease_break_noti(fp, lc);3434 3435			req_op_level = smb2_map_lease_to_oplock(lc->req_state);3436			ksmbd_debug(SMB,3437				    "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",3438				    name, req_op_level, lc->req_state);3439			rc = find_same_lease_key(sess, fp->f_ci, lc);3440			if (rc)3441				goto err_out1;3442		} else if (open_flags == O_RDONLY &&3443			   (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||3444			    req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))3445			req_op_level = SMB2_OPLOCK_LEVEL_II;3446 3447		rc = smb_grant_oplock(work, req_op_level,3448				      fp->persistent_id, fp,3449				      le32_to_cpu(req->hdr.Id.SyncId.TreeId),3450				      lc, share_ret);3451		if (rc < 0)3452			goto err_out1;3453	}3454 3455	if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)3456		ksmbd_fd_set_delete_on_close(fp, file_info);3457 3458	if (need_truncate) {3459		rc = smb2_create_truncate(&fp->filp->f_path);3460		if (rc)3461			goto err_out1;3462	}3463 3464	if (req->CreateContextsOffset) {3465		struct create_alloc_size_req *az_req;3466 3467		az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,3468					SMB2_CREATE_ALLOCATION_SIZE, 4);3469		if (IS_ERR(az_req)) {3470			rc = PTR_ERR(az_req);3471			goto err_out1;3472		} else if (az_req) {3473			loff_t alloc_size;3474			int err;3475 3476			if (le16_to_cpu(az_req->ccontext.DataOffset) +3477			    le32_to_cpu(az_req->ccontext.DataLength) <3478			    sizeof(struct create_alloc_size_req)) {3479				rc = -EINVAL;3480				goto err_out1;3481			}3482			alloc_size = le64_to_cpu(az_req->AllocationSize);3483			ksmbd_debug(SMB,3484				    "request smb2 create allocate size : %llu\n",3485				    alloc_size);3486			smb_break_all_levII_oplock(work, fp, 1);3487			err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,3488					    alloc_size);3489			if (err < 0)3490				ksmbd_debug(SMB,3491					    "vfs_fallocate is failed : %d\n",3492					    err);3493		}3494 3495		context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);3496		if (IS_ERR(context)) {3497			rc = PTR_ERR(context);3498			goto err_out1;3499		} else if (context) {3500			ksmbd_debug(SMB, "get query on disk id context\n");3501			query_disk_id = 1;3502		}3503	}3504 3505	rc = ksmbd_vfs_getattr(&path, &stat);3506	if (rc)3507		goto err_out1;3508 3509	if (stat.result_mask & STATX_BTIME)3510		fp->create_time = ksmbd_UnixTimeToNT(stat.btime);3511	else3512		fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);3513	if (req->FileAttributes || fp->f_ci->m_fattr == 0)3514		fp->f_ci->m_fattr =3515			cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));3516 3517	if (!created)3518		smb2_update_xattrs(tcon, &path, fp);3519	else3520		smb2_new_xattrs(tcon, &path, fp);3521 3522	memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);3523 3524	if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {3525		if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&3526		    test_share_config_flag(work->tcon->share_conf,3527					   KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))3528			fp->is_persistent = true;3529		else3530			fp->is_durable = true;3531 3532		if (dh_info.type == DURABLE_REQ_V2) {3533			memcpy(fp->create_guid, dh_info.CreateGuid,3534					SMB2_CREATE_GUID_SIZE);3535			if (dh_info.timeout)3536				fp->durable_timeout =3537					min_t(unsigned int, dh_info.timeout,3538					      DURABLE_HANDLE_MAX_TIMEOUT);3539			else3540				fp->durable_timeout = 60;3541		}3542	}3543 3544reconnected_fp:3545	rsp->StructureSize = cpu_to_le16(89);3546	rcu_read_lock();3547	opinfo = rcu_dereference(fp->f_opinfo);3548	rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;3549	rcu_read_unlock();3550	rsp->Flags = 0;3551	rsp->CreateAction = cpu_to_le32(file_info);3552	rsp->CreationTime = cpu_to_le64(fp->create_time);3553	time = ksmbd_UnixTimeToNT(stat.atime);3554	rsp->LastAccessTime = cpu_to_le64(time);3555	time = ksmbd_UnixTimeToNT(stat.mtime);3556	rsp->LastWriteTime = cpu_to_le64(time);3557	time = ksmbd_UnixTimeToNT(stat.ctime);3558	rsp->ChangeTime = cpu_to_le64(time);3559	rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :3560		cpu_to_le64(stat.blocks << 9);3561	rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);3562	rsp->FileAttributes = fp->f_ci->m_fattr;3563 3564	rsp->Reserved2 = 0;3565 3566	rsp->PersistentFileId = fp->persistent_id;3567	rsp->VolatileFileId = fp->volatile_id;3568 3569	rsp->CreateContextsOffset = 0;3570	rsp->CreateContextsLength = 0;3571	iov_len = offsetof(struct smb2_create_rsp, Buffer);3572 3573	/* If lease is request send lease context response */3574	if (opinfo && opinfo->is_lease) {3575		struct create_context *lease_ccontext;3576 3577		ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",3578			    name, opinfo->o_lease->state);3579		rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;3580 3581		lease_ccontext = (struct create_context *)rsp->Buffer;3582		contxt_cnt++;3583		create_lease_buf(rsp->Buffer, opinfo->o_lease);3584		le32_add_cpu(&rsp->CreateContextsLength,3585			     conn->vals->create_lease_size);3586		iov_len += conn->vals->create_lease_size;3587		next_ptr = &lease_ccontext->Next;3588		next_off = conn->vals->create_lease_size;3589	}3590 3591	if (maximal_access_ctxt) {3592		struct create_context *mxac_ccontext;3593 3594		if (maximal_access == 0)3595			ksmbd_vfs_query_maximal_access(idmap,3596						       path.dentry,3597						       &maximal_access);3598		mxac_ccontext = (struct create_context *)(rsp->Buffer +3599				le32_to_cpu(rsp->CreateContextsLength));3600		contxt_cnt++;3601		create_mxac_rsp_buf(rsp->Buffer +3602				le32_to_cpu(rsp->CreateContextsLength),3603				le32_to_cpu(maximal_access));3604		le32_add_cpu(&rsp->CreateContextsLength,3605			     conn->vals->create_mxac_size);3606		iov_len += conn->vals->create_mxac_size;3607		if (next_ptr)3608			*next_ptr = cpu_to_le32(next_off);3609		next_ptr = &mxac_ccontext->Next;3610		next_off = conn->vals->create_mxac_size;3611	}3612 3613	if (query_disk_id) {3614		struct create_context *disk_id_ccontext;3615 3616		disk_id_ccontext = (struct create_context *)(rsp->Buffer +3617				le32_to_cpu(rsp->CreateContextsLength));3618		contxt_cnt++;3619		create_disk_id_rsp_buf(rsp->Buffer +3620				le32_to_cpu(rsp->CreateContextsLength),3621				stat.ino, tcon->id);3622		le32_add_cpu(&rsp->CreateContextsLength,3623			     conn->vals->create_disk_id_size);3624		iov_len += conn->vals->create_disk_id_size;3625		if (next_ptr)3626			*next_ptr = cpu_to_le32(next_off);3627		next_ptr = &disk_id_ccontext->Next;3628		next_off = conn->vals->create_disk_id_size;3629	}3630 3631	if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) {3632		struct create_context *durable_ccontext;3633 3634		durable_ccontext = (struct create_context *)(rsp->Buffer +3635				le32_to_cpu(rsp->CreateContextsLength));3636		contxt_cnt++;3637		if (dh_info.type == DURABLE_REQ) {3638			create_durable_rsp_buf(rsp->Buffer +3639					le32_to_cpu(rsp->CreateContextsLength));3640			le32_add_cpu(&rsp->CreateContextsLength,3641					conn->vals->create_durable_size);3642			iov_len += conn->vals->create_durable_size;3643		} else {3644			create_durable_v2_rsp_buf(rsp->Buffer +3645					le32_to_cpu(rsp->CreateContextsLength),3646					fp);3647			le32_add_cpu(&rsp->CreateContextsLength,3648					conn->vals->create_durable_v2_size);3649			iov_len += conn->vals->create_durable_v2_size;3650		}3651 3652		if (next_ptr)3653			*next_ptr = cpu_to_le32(next_off);3654		next_ptr = &durable_ccontext->Next;3655		next_off = conn->vals->create_durable_size;3656	}3657 3658	if (posix_ctxt) {3659		contxt_cnt++;3660		create_posix_rsp_buf(rsp->Buffer +3661				le32_to_cpu(rsp->CreateContextsLength),3662				fp);3663		le32_add_cpu(&rsp->CreateContextsLength,3664			     conn->vals->create_posix_size);3665		iov_len += conn->vals->create_posix_size;3666		if (next_ptr)3667			*next_ptr = cpu_to_le32(next_off);3668	}3669 3670	if (contxt_cnt > 0) {3671		rsp->CreateContextsOffset =3672			cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));3673	}3674 3675err_out:3676	if (rc && (file_present || created))3677		ksmbd_vfs_kern_path_unlock(&parent_path, &path);3678 3679err_out1:3680	ksmbd_revert_fsids(work);3681 3682err_out2:3683	if (!rc) {3684		ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);3685		rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);3686	}3687	if (rc) {3688		if (rc == -EINVAL)3689			rsp->hdr.Status = STATUS_INVALID_PARAMETER;3690		else if (rc == -EOPNOTSUPP)3691			rsp->hdr.Status = STATUS_NOT_SUPPORTED;3692		else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)3693			rsp->hdr.Status = STATUS_ACCESS_DENIED;3694		else if (rc == -ENOENT)3695			rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;3696		else if (rc == -EPERM)3697			rsp->hdr.Status = STATUS_SHARING_VIOLATION;3698		else if (rc == -EBUSY)3699			rsp->hdr.Status = STATUS_DELETE_PENDING;3700		else if (rc == -EBADF)3701			rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;3702		else if (rc == -ENOEXEC)3703			rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;3704		else if (rc == -ENXIO)3705			rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;3706		else if (rc == -EEXIST)3707			rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;3708		else if (rc == -EMFILE)3709			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;3710		if (!rsp->hdr.Status)3711			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;3712 3713		if (fp)3714			ksmbd_fd_put(work, fp);3715		smb2_set_err_rsp(work);3716		ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);3717	}3718 3719	kfree(name);3720	kfree(lc);3721 3722	return rc;3723}3724 3725static int readdir_info_level_struct_sz(int info_level)3726{3727	switch (info_level) {3728	case FILE_FULL_DIRECTORY_INFORMATION:3729		return sizeof(struct file_full_directory_info);3730	case FILE_BOTH_DIRECTORY_INFORMATION:3731		return sizeof(struct file_both_directory_info);3732	case FILE_DIRECTORY_INFORMATION:3733		return sizeof(struct file_directory_info);3734	case FILE_NAMES_INFORMATION:3735		return sizeof(struct file_names_info);3736	case FILEID_FULL_DIRECTORY_INFORMATION:3737		return sizeof(struct file_id_full_dir_info);3738	case FILEID_BOTH_DIRECTORY_INFORMATION:3739		return sizeof(struct file_id_both_directory_info);3740	case SMB_FIND_FILE_POSIX_INFO:3741		return sizeof(struct smb2_posix_info);3742	default:3743		return -EOPNOTSUPP;3744	}3745}3746 3747static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)3748{3749	switch (info_level) {3750	case FILE_FULL_DIRECTORY_INFORMATION:3751	{3752		struct file_full_directory_info *ffdinfo;3753 3754		ffdinfo = (struct file_full_directory_info *)d_info->rptr;3755		d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);3756		d_info->name = ffdinfo->FileName;3757		d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);3758		return 0;3759	}3760	case FILE_BOTH_DIRECTORY_INFORMATION:3761	{3762		struct file_both_directory_info *fbdinfo;3763 3764		fbdinfo = (struct file_both_directory_info *)d_info->rptr;3765		d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);3766		d_info->name = fbdinfo->FileName;3767		d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);3768		return 0;3769	}3770	case FILE_DIRECTORY_INFORMATION:3771	{3772		struct file_directory_info *fdinfo;3773 3774		fdinfo = (struct file_directory_info *)d_info->rptr;3775		d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);3776		d_info->name = fdinfo->FileName;3777		d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);3778		return 0;3779	}3780	case FILE_NAMES_INFORMATION:3781	{3782		struct file_names_info *fninfo;3783 3784		fninfo = (struct file_names_info *)d_info->rptr;3785		d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);3786		d_info->name = fninfo->FileName;3787		d_info->name_len = le32_to_cpu(fninfo->FileNameLength);3788		return 0;3789	}3790	case FILEID_FULL_DIRECTORY_INFORMATION:3791	{3792		struct file_id_full_dir_info *dinfo;3793 3794		dinfo = (struct file_id_full_dir_info *)d_info->rptr;3795		d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);3796		d_info->name = dinfo->FileName;3797		d_info->name_len = le32_to_cpu(dinfo->FileNameLength);3798		return 0;3799	}3800	case FILEID_BOTH_DIRECTORY_INFORMATION:3801	{3802		struct file_id_both_directory_info *fibdinfo;3803 3804		fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;3805		d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);3806		d_info->name = fibdinfo->FileName;3807		d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);3808		return 0;3809	}3810	case SMB_FIND_FILE_POSIX_INFO:3811	{3812		struct smb2_posix_info *posix_info;3813 3814		posix_info = (struct smb2_posix_info *)d_info->rptr;3815		d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);3816		d_info->name = posix_info->name;3817		d_info->name_len = le32_to_cpu(posix_info->name_len);3818		return 0;3819	}3820	default:3821		return -EINVAL;3822	}3823}3824 3825/**3826 * smb2_populate_readdir_entry() - encode directory entry in smb2 response3827 * buffer3828 * @conn:	connection instance3829 * @info_level:	smb information level3830 * @d_info:	structure included variables for query dir3831 * @ksmbd_kstat:	ksmbd wrapper of dirent stat information3832 *3833 * if directory has many entries, find first can't read it fully.3834 * find next might be called multiple times to read remaining dir entries3835 *3836 * Return:	0 on success, otherwise error3837 */3838static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,3839				       struct ksmbd_dir_info *d_info,3840				       struct ksmbd_kstat *ksmbd_kstat)3841{3842	int next_entry_offset = 0;3843	char *conv_name;3844	int conv_len;3845	void *kstat;3846	int struct_sz, rc = 0;3847 3848	conv_name = ksmbd_convert_dir_info_name(d_info,3849						conn->local_nls,3850						&conv_len);3851	if (!conv_name)3852		return -ENOMEM;3853 3854	/* Somehow the name has only terminating NULL bytes */3855	if (conv_len < 0) {3856		rc = -EINVAL;3857		goto free_conv_name;3858	}3859 3860	struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;3861	next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);3862	d_info->last_entry_off_align = next_entry_offset - struct_sz;3863 3864	if (next_entry_offset > d_info->out_buf_len) {3865		d_info->out_buf_len = 0;3866		rc = -ENOSPC;3867		goto free_conv_name;3868	}3869 3870	kstat = d_info->wptr;3871	if (info_level != FILE_NAMES_INFORMATION)3872		kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);3873 3874	switch (info_level) {3875	case FILE_FULL_DIRECTORY_INFORMATION:3876	{3877		struct file_full_directory_info *ffdinfo;3878 3879		ffdinfo = (struct file_full_directory_info *)kstat;3880		ffdinfo->FileNameLength = cpu_to_le32(conv_len);3881		ffdinfo->EaSize =3882			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);3883		if (ffdinfo->EaSize)3884			ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;3885		if (d_info->hide_dot_file && d_info->name[0] == '.')3886			ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;3887		memcpy(ffdinfo->FileName, conv_name, conv_len);3888		ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);3889		break;3890	}3891	case FILE_BOTH_DIRECTORY_INFORMATION:3892	{3893		struct file_both_directory_info *fbdinfo;3894 3895		fbdinfo = (struct file_both_directory_info *)kstat;3896		fbdinfo->FileNameLength = cpu_to_le32(conv_len);3897		fbdinfo->EaSize =3898			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);3899		if (fbdinfo->EaSize)3900			fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;3901		fbdinfo->ShortNameLength = 0;3902		fbdinfo->Reserved = 0;3903		if (d_info->hide_dot_file && d_info->name[0] == '.')3904			fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;3905		memcpy(fbdinfo->FileName, conv_name, conv_len);3906		fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);3907		break;3908	}3909	case FILE_DIRECTORY_INFORMATION:3910	{3911		struct file_directory_info *fdinfo;3912 3913		fdinfo = (struct file_directory_info *)kstat;3914		fdinfo->FileNameLength = cpu_to_le32(conv_len);3915		if (d_info->hide_dot_file && d_info->name[0] == '.')3916			fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;3917		memcpy(fdinfo->FileName, conv_name, conv_len);3918		fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);3919		break;3920	}3921	case FILE_NAMES_INFORMATION:3922	{3923		struct file_names_info *fninfo;3924 3925		fninfo = (struct file_names_info *)kstat;3926		fninfo->FileNameLength = cpu_to_le32(conv_len);3927		memcpy(fninfo->FileName, conv_name, conv_len);3928		fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);3929		break;3930	}3931	case FILEID_FULL_DIRECTORY_INFORMATION:3932	{3933		struct file_id_full_dir_info *dinfo;3934 3935		dinfo = (struct file_id_full_dir_info *)kstat;3936		dinfo->FileNameLength = cpu_to_le32(conv_len);3937		dinfo->EaSize =3938			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);3939		if (dinfo->EaSize)3940			dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;3941		dinfo->Reserved = 0;3942		dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);3943		if (d_info->hide_dot_file && d_info->name[0] == '.')3944			dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;3945		memcpy(dinfo->FileName, conv_name, conv_len);3946		dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);3947		break;3948	}3949	case FILEID_BOTH_DIRECTORY_INFORMATION:3950	{3951		struct file_id_both_directory_info *fibdinfo;3952 3953		fibdinfo = (struct file_id_both_directory_info *)kstat;3954		fibdinfo->FileNameLength = cpu_to_le32(conv_len);3955		fibdinfo->EaSize =3956			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);3957		if (fibdinfo->EaSize)3958			fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;3959		fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);3960		fibdinfo->ShortNameLength = 0;3961		fibdinfo->Reserved = 0;3962		fibdinfo->Reserved2 = cpu_to_le16(0);3963		if (d_info->hide_dot_file && d_info->name[0] == '.')3964			fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;3965		memcpy(fibdinfo->FileName, conv_name, conv_len);3966		fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);3967		break;3968	}3969	case SMB_FIND_FILE_POSIX_INFO:3970	{3971		struct smb2_posix_info *posix_info;3972		u64 time;3973 3974		posix_info = (struct smb2_posix_info *)kstat;3975		posix_info->Ignored = 0;3976		posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);3977		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);3978		posix_info->ChangeTime = cpu_to_le64(time);3979		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);3980		posix_info->LastAccessTime = cpu_to_le64(time);3981		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);3982		posix_info->LastWriteTime = cpu_to_le64(time);3983		posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);3984		posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);3985		posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);3986		posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);3987		posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);3988		posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);3989		posix_info->DosAttributes =3990			S_ISDIR(ksmbd_kstat->kstat->mode) ?3991				FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;3992		if (d_info->hide_dot_file && d_info->name[0] == '.')3993			posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;3994		/*3995		 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).3996		 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +3997		 *		  sub_auth(4 * 1(num_subauth)) + RID(4).3998		 */3999		id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),4000			  SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);4001		id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),4002			  SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);4003		memcpy(posix_info->name, conv_name, conv_len);4004		posix_info->name_len = cpu_to_le32(conv_len);4005		posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);4006		break;4007	}4008 4009	} /* switch (info_level) */4010 4011	d_info->last_entry_offset = d_info->data_count;4012	d_info->data_count += next_entry_offset;4013	d_info->out_buf_len -= next_entry_offset;4014	d_info->wptr += next_entry_offset;4015 4016	ksmbd_debug(SMB,4017		    "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",4018		    info_level, d_info->out_buf_len,4019		    next_entry_offset, d_info->data_count);4020 4021free_conv_name:4022	kfree(conv_name);4023	return rc;4024}4025 4026struct smb2_query_dir_private {4027	struct ksmbd_work	*work;4028	char			*search_pattern;4029	struct ksmbd_file	*dir_fp;4030 4031	struct ksmbd_dir_info	*d_info;4032	int			info_level;4033};4034 4035static void lock_dir(struct ksmbd_file *dir_fp)4036{4037	struct dentry *dir = dir_fp->filp->f_path.dentry;4038 4039	inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);4040}4041 4042static void unlock_dir(struct ksmbd_file *dir_fp)4043{4044	struct dentry *dir = dir_fp->filp->f_path.dentry;4045 4046	inode_unlock(d_inode(dir));4047}4048 4049static int process_query_dir_entries(struct smb2_query_dir_private *priv)4050{4051	struct mnt_idmap	*idmap = file_mnt_idmap(priv->dir_fp->filp);4052	struct kstat		kstat;4053	struct ksmbd_kstat	ksmbd_kstat;4054	int			rc;4055	int			i;4056 4057	for (i = 0; i < priv->d_info->num_entry; i++) {4058		struct dentry *dent;4059 4060		if (dentry_name(priv->d_info, priv->info_level))4061			return -EINVAL;4062 4063		lock_dir(priv->dir_fp);4064		dent = lookup_one(idmap, priv->d_info->name,4065				  priv->dir_fp->filp->f_path.dentry,4066				  priv->d_info->name_len);4067		unlock_dir(priv->dir_fp);4068 4069		if (IS_ERR(dent)) {4070			ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",4071				    priv->d_info->name,4072				    PTR_ERR(dent));4073			continue;4074		}4075		if (unlikely(d_is_negative(dent))) {4076			dput(dent);4077			ksmbd_debug(SMB, "Negative dentry `%s'\n",4078				    priv->d_info->name);4079			continue;4080		}4081 4082		ksmbd_kstat.kstat = &kstat;4083		if (priv->info_level != FILE_NAMES_INFORMATION) {4084			rc = ksmbd_vfs_fill_dentry_attrs(priv->work,4085							 idmap,4086							 dent,4087							 &ksmbd_kstat);4088			if (rc) {4089				dput(dent);4090				continue;4091			}4092		}4093 4094		rc = smb2_populate_readdir_entry(priv->work->conn,4095						 priv->info_level,4096						 priv->d_info,4097						 &ksmbd_kstat);4098		dput(dent);4099		if (rc)4100			return rc;4101	}4102	return 0;4103}4104 4105static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,4106				   int info_level)4107{4108	int struct_sz;4109	int conv_len;4110	int next_entry_offset;4111 4112	struct_sz = readdir_info_level_struct_sz(info_level);4113	if (struct_sz == -EOPNOTSUPP)4114		return -EOPNOTSUPP;4115 4116	conv_len = (d_info->name_len + 1) * 2;4117	next_entry_offset = ALIGN(struct_sz + conv_len,4118				  KSMBD_DIR_INFO_ALIGNMENT);4119 4120	if (next_entry_offset > d_info->out_buf_len) {4121		d_info->out_buf_len = 0;4122		return -ENOSPC;4123	}4124 4125	switch (info_level) {4126	case FILE_FULL_DIRECTORY_INFORMATION:4127	{4128		struct file_full_directory_info *ffdinfo;4129 4130		ffdinfo = (struct file_full_directory_info *)d_info->wptr;4131		memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);4132		ffdinfo->FileName[d_info->name_len] = 0x00;4133		ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);4134		ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);4135		break;4136	}4137	case FILE_BOTH_DIRECTORY_INFORMATION:4138	{4139		struct file_both_directory_info *fbdinfo;4140 4141		fbdinfo = (struct file_both_directory_info *)d_info->wptr;4142		memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);4143		fbdinfo->FileName[d_info->name_len] = 0x00;4144		fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);4145		fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);4146		break;4147	}4148	case FILE_DIRECTORY_INFORMATION:4149	{4150		struct file_directory_info *fdinfo;4151 4152		fdinfo = (struct file_directory_info *)d_info->wptr;4153		memcpy(fdinfo->FileName, d_info->name, d_info->name_len);4154		fdinfo->FileName[d_info->name_len] = 0x00;4155		fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);4156		fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);4157		break;4158	}4159	case FILE_NAMES_INFORMATION:4160	{4161		struct file_names_info *fninfo;4162 4163		fninfo = (struct file_names_info *)d_info->wptr;4164		memcpy(fninfo->FileName, d_info->name, d_info->name_len);4165		fninfo->FileName[d_info->name_len] = 0x00;4166		fninfo->FileNameLength = cpu_to_le32(d_info->name_len);4167		fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);4168		break;4169	}4170	case FILEID_FULL_DIRECTORY_INFORMATION:4171	{4172		struct file_id_full_dir_info *dinfo;4173 4174		dinfo = (struct file_id_full_dir_info *)d_info->wptr;4175		memcpy(dinfo->FileName, d_info->name, d_info->name_len);4176		dinfo->FileName[d_info->name_len] = 0x00;4177		dinfo->FileNameLength = cpu_to_le32(d_info->name_len);4178		dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);4179		break;4180	}4181	case FILEID_BOTH_DIRECTORY_INFORMATION:4182	{4183		struct file_id_both_directory_info *fibdinfo;4184 4185		fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;4186		memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);4187		fibdinfo->FileName[d_info->name_len] = 0x00;4188		fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);4189		fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);4190		break;4191	}4192	case SMB_FIND_FILE_POSIX_INFO:4193	{4194		struct smb2_posix_info *posix_info;4195 4196		posix_info = (struct smb2_posix_info *)d_info->wptr;4197		memcpy(posix_info->name, d_info->name, d_info->name_len);4198		posix_info->name[d_info->name_len] = 0x00;4199		posix_info->name_len = cpu_to_le32(d_info->name_len);4200		posix_info->NextEntryOffset =4201			cpu_to_le32(next_entry_offset);4202		break;4203	}4204	} /* switch (info_level) */4205 4206	d_info->num_entry++;4207	d_info->out_buf_len -= next_entry_offset;4208	d_info->wptr += next_entry_offset;4209	return 0;4210}4211 4212static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,4213		       loff_t offset, u64 ino, unsigned int d_type)4214{4215	struct ksmbd_readdir_data	*buf;4216	struct smb2_query_dir_private	*priv;4217	struct ksmbd_dir_info		*d_info;4218	int				rc;4219 4220	buf	= container_of(ctx, struct ksmbd_readdir_data, ctx);4221	priv	= buf->private;4222	d_info	= priv->d_info;4223 4224	/* dot and dotdot entries are already reserved */4225	if (!strcmp(".", name) || !strcmp("..", name))4226		return true;4227	if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))4228		return true;4229	if (!match_pattern(name, namlen, priv->search_pattern))4230		return true;4231 4232	d_info->name		= name;4233	d_info->name_len	= namlen;4234	rc = reserve_populate_dentry(d_info, priv->info_level);4235	if (rc)4236		return false;4237	if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)4238		d_info->out_buf_len = 0;4239	return true;4240}4241 4242static int verify_info_level(int info_level)4243{4244	switch (info_level) {4245	case FILE_FULL_DIRECTORY_INFORMATION:4246	case FILE_BOTH_DIRECTORY_INFORMATION:4247	case FILE_DIRECTORY_INFORMATION:4248	case FILE_NAMES_INFORMATION:4249	case FILEID_FULL_DIRECTORY_INFORMATION:4250	case FILEID_BOTH_DIRECTORY_INFORMATION:4251	case SMB_FIND_FILE_POSIX_INFO:4252		break;4253	default:4254		return -EOPNOTSUPP;4255	}4256 4257	return 0;4258}4259 4260static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)4261{4262	int free_len;4263 4264	free_len = (int)(work->response_sz -4265		(get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;4266	return free_len;4267}4268 4269static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,4270				     unsigned short hdr2_len,4271				     unsigned int out_buf_len)4272{4273	int free_len;4274 4275	if (out_buf_len > work->conn->vals->max_trans_size)4276		return -EINVAL;4277 4278	free_len = smb2_resp_buf_len(work, hdr2_len);4279	if (free_len < 0)4280		return -EINVAL;4281 4282	return min_t(int, out_buf_len, free_len);4283}4284 4285int smb2_query_dir(struct ksmbd_work *work)4286{4287	struct ksmbd_conn *conn = work->conn;4288	struct smb2_query_directory_req *req;4289	struct smb2_query_directory_rsp *rsp;4290	struct ksmbd_share_config *share = work->tcon->share_conf;4291	struct ksmbd_file *dir_fp = NULL;4292	struct ksmbd_dir_info d_info;4293	int rc = 0;4294	char *srch_ptr = NULL;4295	unsigned char srch_flag;4296	int buffer_sz;4297	struct smb2_query_dir_private query_dir_private = {NULL, };4298 4299	WORK_BUFFERS(work, req, rsp);4300 4301	if (ksmbd_override_fsids(work)) {4302		rsp->hdr.Status = STATUS_NO_MEMORY;4303		smb2_set_err_rsp(work);4304		return -ENOMEM;4305	}4306 4307	rc = verify_info_level(req->FileInformationClass);4308	if (rc) {4309		rc = -EFAULT;4310		goto err_out2;4311	}4312 4313	dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);4314	if (!dir_fp) {4315		rc = -EBADF;4316		goto err_out2;4317	}4318 4319	if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||4320	    inode_permission(file_mnt_idmap(dir_fp->filp),4321			     file_inode(dir_fp->filp),4322			     MAY_READ | MAY_EXEC)) {4323		pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);4324		rc = -EACCES;4325		goto err_out2;4326	}4327 4328	if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {4329		pr_err("can't do query dir for a file\n");4330		rc = -EINVAL;4331		goto err_out2;4332	}4333 4334	srch_flag = req->Flags;4335	srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset),4336					  le16_to_cpu(req->FileNameLength), 1,4337					  conn->local_nls);4338	if (IS_ERR(srch_ptr)) {4339		ksmbd_debug(SMB, "Search Pattern not found\n");4340		rc = -EINVAL;4341		goto err_out2;4342	} else {4343		ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);4344	}4345 4346	if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {4347		ksmbd_debug(SMB, "Restart directory scan\n");4348		generic_file_llseek(dir_fp->filp, 0, SEEK_SET);4349	}4350 4351	memset(&d_info, 0, sizeof(struct ksmbd_dir_info));4352	d_info.wptr = (char *)rsp->Buffer;4353	d_info.rptr = (char *)rsp->Buffer;4354	d_info.out_buf_len =4355		smb2_calc_max_out_buf_len(work, 8,4356					  le32_to_cpu(req->OutputBufferLength));4357	if (d_info.out_buf_len < 0) {4358		rc = -EINVAL;4359		goto err_out;4360	}4361	d_info.flags = srch_flag;4362 4363	/*4364	 * reserve dot and dotdot entries in head of buffer4365	 * in first response4366	 */4367	rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,4368					       dir_fp, &d_info, srch_ptr,4369					       smb2_populate_readdir_entry);4370	if (rc == -ENOSPC)4371		rc = 0;4372	else if (rc)4373		goto err_out;4374 4375	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))4376		d_info.hide_dot_file = true;4377 4378	buffer_sz				= d_info.out_buf_len;4379	d_info.rptr				= d_info.wptr;4380	query_dir_private.work			= work;4381	query_dir_private.search_pattern	= srch_ptr;4382	query_dir_private.dir_fp		= dir_fp;4383	query_dir_private.d_info		= &d_info;4384	query_dir_private.info_level		= req->FileInformationClass;4385	dir_fp->readdir_data.private		= &query_dir_private;4386	set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);4387 4388	rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);4389	/*4390	 * req->OutputBufferLength is too small to contain even one entry.4391	 * In this case, it immediately returns OutputBufferLength 0 to client.4392	 */4393	if (!d_info.out_buf_len && !d_info.num_entry)4394		goto no_buf_len;4395	if (rc > 0 || rc == -ENOSPC)4396		rc = 0;4397	else if (rc)4398		goto err_out;4399 4400	d_info.wptr = d_info.rptr;4401	d_info.out_buf_len = buffer_sz;4402	rc = process_query_dir_entries(&query_dir_private);4403	if (rc)4404		goto err_out;4405 4406	if (!d_info.data_count && d_info.out_buf_len >= 0) {4407		if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {4408			rsp->hdr.Status = STATUS_NO_SUCH_FILE;4409		} else {4410			dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;4411			rsp->hdr.Status = STATUS_NO_MORE_FILES;4412		}4413		rsp->StructureSize = cpu_to_le16(9);4414		rsp->OutputBufferOffset = cpu_to_le16(0);4415		rsp->OutputBufferLength = cpu_to_le32(0);4416		rsp->Buffer[0] = 0;4417		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,4418				       offsetof(struct smb2_query_directory_rsp, Buffer)4419				       + 1);4420		if (rc)4421			goto err_out;4422	} else {4423no_buf_len:4424		((struct file_directory_info *)4425		((char *)rsp->Buffer + d_info.last_entry_offset))4426		->NextEntryOffset = 0;4427		if (d_info.data_count >= d_info.last_entry_off_align)4428			d_info.data_count -= d_info.last_entry_off_align;4429 4430		rsp->StructureSize = cpu_to_le16(9);4431		rsp->OutputBufferOffset = cpu_to_le16(72);4432		rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);4433		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,4434				       offsetof(struct smb2_query_directory_rsp, Buffer) +4435				       d_info.data_count);4436		if (rc)4437			goto err_out;4438	}4439 4440	kfree(srch_ptr);4441	ksmbd_fd_put(work, dir_fp);4442	ksmbd_revert_fsids(work);4443	return 0;4444 4445err_out:4446	pr_err("error while processing smb2 query dir rc = %d\n", rc);4447	kfree(srch_ptr);4448 4449err_out2:4450	if (rc == -EINVAL)4451		rsp->hdr.Status = STATUS_INVALID_PARAMETER;4452	else if (rc == -EACCES)4453		rsp->hdr.Status = STATUS_ACCESS_DENIED;4454	else if (rc == -ENOENT)4455		rsp->hdr.Status = STATUS_NO_SUCH_FILE;4456	else if (rc == -EBADF)4457		rsp->hdr.Status = STATUS_FILE_CLOSED;4458	else if (rc == -ENOMEM)4459		rsp->hdr.Status = STATUS_NO_MEMORY;4460	else if (rc == -EFAULT)4461		rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;4462	else if (rc == -EIO)4463		rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;4464	if (!rsp->hdr.Status)4465		rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;4466 4467	smb2_set_err_rsp(work);4468	ksmbd_fd_put(work, dir_fp);4469	ksmbd_revert_fsids(work);4470	return 0;4471}4472 4473/**4474 * buffer_check_err() - helper function to check buffer errors4475 * @reqOutputBufferLength:	max buffer length expected in command response4476 * @rsp:		query info response buffer contains output buffer length4477 * @rsp_org:		base response buffer pointer in case of chained response4478 *4479 * Return:	0 on success, otherwise error4480 */4481static int buffer_check_err(int reqOutputBufferLength,4482			    struct smb2_query_info_rsp *rsp,4483			    void *rsp_org)4484{4485	if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {4486		pr_err("Invalid Buffer Size Requested\n");4487		rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;4488		*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));4489		return -EINVAL;4490	}4491	return 0;4492}4493 4494static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,4495				   void *rsp_org)4496{4497	struct smb2_file_standard_info *sinfo;4498 4499	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;4500 4501	sinfo->AllocationSize = cpu_to_le64(4096);4502	sinfo->EndOfFile = cpu_to_le64(0);4503	sinfo->NumberOfLinks = cpu_to_le32(1);4504	sinfo->DeletePending = 1;4505	sinfo->Directory = 0;4506	rsp->OutputBufferLength =4507		cpu_to_le32(sizeof(struct smb2_file_standard_info));4508}4509 4510static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,4511				   void *rsp_org)4512{4513	struct smb2_file_internal_info *file_info;4514 4515	file_info = (struct smb2_file_internal_info *)rsp->Buffer;4516 4517	/* any unique number */4518	file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));4519	rsp->OutputBufferLength =4520		cpu_to_le32(sizeof(struct smb2_file_internal_info));4521}4522 4523static int smb2_get_info_file_pipe(struct ksmbd_session *sess,4524				   struct smb2_query_info_req *req,4525				   struct smb2_query_info_rsp *rsp,4526				   void *rsp_org)4527{4528	u64 id;4529	int rc;4530 4531	/*4532	 * Windows can sometime send query file info request on4533	 * pipe without opening it, checking error condition here4534	 */4535	id = req->VolatileFileId;4536	if (!ksmbd_session_rpc_method(sess, id))4537		return -ENOENT;4538 4539	ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",4540		    req->FileInfoClass, req->VolatileFileId);4541 4542	switch (req->FileInfoClass) {4543	case FILE_STANDARD_INFORMATION:4544		get_standard_info_pipe(rsp, rsp_org);4545		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),4546				      rsp, rsp_org);4547		break;4548	case FILE_INTERNAL_INFORMATION:4549		get_internal_info_pipe(rsp, id, rsp_org);4550		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),4551				      rsp, rsp_org);4552		break;4553	default:4554		ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",4555			    req->FileInfoClass);4556		rc = -EOPNOTSUPP;4557	}4558	return rc;4559}4560 4561/**4562 * smb2_get_ea() - handler for smb2 get extended attribute command4563 * @work:	smb work containing query info command buffer4564 * @fp:		ksmbd_file pointer4565 * @req:	get extended attribute request4566 * @rsp:	response buffer pointer4567 * @rsp_org:	base response buffer pointer in case of chained response4568 *4569 * Return:	0 on success, otherwise error4570 */4571static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,4572		       struct smb2_query_info_req *req,4573		       struct smb2_query_info_rsp *rsp, void *rsp_org)4574{4575	struct smb2_ea_info *eainfo, *prev_eainfo;4576	char *name, *ptr, *xattr_list = NULL, *buf;4577	int rc, name_len, value_len, xattr_list_len, idx;4578	ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;4579	struct smb2_ea_info_req *ea_req = NULL;4580	const struct path *path;4581	struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);4582 4583	if (!(fp->daccess & FILE_READ_EA_LE)) {4584		pr_err("Not permitted to read ext attr : 0x%x\n",4585		       fp->daccess);4586		return -EACCES;4587	}4588 4589	path = &fp->filp->f_path;4590	/* single EA entry is requested with given user.* name */4591	if (req->InputBufferLength) {4592		if (le32_to_cpu(req->InputBufferLength) <=4593		    sizeof(struct smb2_ea_info_req))4594			return -EINVAL;4595 4596		ea_req = (struct smb2_ea_info_req *)((char *)req +4597						     le16_to_cpu(req->InputBufferOffset));4598	} else {4599		/* need to send all EAs, if no specific EA is requested*/4600		if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)4601			ksmbd_debug(SMB,4602				    "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",4603				    le32_to_cpu(req->Flags));4604	}4605 4606	buf_free_len =4607		smb2_calc_max_out_buf_len(work, 8,4608					  le32_to_cpu(req->OutputBufferLength));4609	if (buf_free_len < 0)4610		return -EINVAL;4611 4612	rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);4613	if (rc < 0) {4614		rsp->hdr.Status = STATUS_INVALID_HANDLE;4615		goto out;4616	} else if (!rc) { /* there is no EA in the file */4617		ksmbd_debug(SMB, "no ea data in the file\n");4618		goto done;4619	}4620	xattr_list_len = rc;4621 4622	ptr = (char *)rsp->Buffer;4623	eainfo = (struct smb2_ea_info *)ptr;4624	prev_eainfo = eainfo;4625	idx = 0;4626 4627	while (idx < xattr_list_len) {4628		name = xattr_list + idx;4629		name_len = strlen(name);4630 4631		ksmbd_debug(SMB, "%s, len %d\n", name, name_len);4632		idx += name_len + 1;4633 4634		/*4635		 * CIFS does not support EA other than user.* namespace,4636		 * still keep the framework generic, to list other attrs4637		 * in future.4638		 */4639		if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))4640			continue;4641 4642		if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,4643			     STREAM_PREFIX_LEN))4644			continue;4645 4646		if (req->InputBufferLength &&4647		    strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,4648			    ea_req->EaNameLength))4649			continue;4650 4651		if (!strncmp(&name[XATTR_USER_PREFIX_LEN],4652			     DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))4653			continue;4654 4655		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))4656			name_len -= XATTR_USER_PREFIX_LEN;4657 4658		ptr = eainfo->name + name_len + 1;4659		buf_free_len -= (offsetof(struct smb2_ea_info, name) +4660				name_len + 1);4661		/* bailout if xattr can't fit in buf_free_len */4662		value_len = ksmbd_vfs_getxattr(idmap, path->dentry,4663					       name, &buf);4664		if (value_len <= 0) {4665			rc = -ENOENT;4666			rsp->hdr.Status = STATUS_INVALID_HANDLE;4667			goto out;4668		}4669 4670		buf_free_len -= value_len;4671		if (buf_free_len < 0) {4672			kfree(buf);4673			break;4674		}4675 4676		memcpy(ptr, buf, value_len);4677		kfree(buf);4678 4679		ptr += value_len;4680		eainfo->Flags = 0;4681		eainfo->EaNameLength = name_len;4682 4683		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))4684			memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],4685			       name_len);4686		else4687			memcpy(eainfo->name, name, name_len);4688 4689		eainfo->name[name_len] = '\0';4690		eainfo->EaValueLength = cpu_to_le16(value_len);4691		next_offset = offsetof(struct smb2_ea_info, name) +4692			name_len + 1 + value_len;4693 4694		/* align next xattr entry at 4 byte bundary */4695		alignment_bytes = ((next_offset + 3) & ~3) - next_offset;4696		if (alignment_bytes) {4697			memset(ptr, '\0', alignment_bytes);4698			ptr += alignment_bytes;4699			next_offset += alignment_bytes;4700			buf_free_len -= alignment_bytes;4701		}4702		eainfo->NextEntryOffset = cpu_to_le32(next_offset);4703		prev_eainfo = eainfo;4704		eainfo = (struct smb2_ea_info *)ptr;4705		rsp_data_cnt += next_offset;4706 4707		if (req->InputBufferLength) {4708			ksmbd_debug(SMB, "single entry requested\n");4709			break;4710		}4711	}4712 4713	/* no more ea entries */4714	prev_eainfo->NextEntryOffset = 0;4715done:4716	rc = 0;4717	if (rsp_data_cnt == 0)4718		rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;4719	rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);4720out:4721	kvfree(xattr_list);4722	return rc;4723}4724 4725static void get_file_access_info(struct smb2_query_info_rsp *rsp,4726				 struct ksmbd_file *fp, void *rsp_org)4727{4728	struct smb2_file_access_info *file_info;4729 4730	file_info = (struct smb2_file_access_info *)rsp->Buffer;4731	file_info->AccessFlags = fp->daccess;4732	rsp->OutputBufferLength =4733		cpu_to_le32(sizeof(struct smb2_file_access_info));4734}4735 4736static int get_file_basic_info(struct smb2_query_info_rsp *rsp,4737			       struct ksmbd_file *fp, void *rsp_org)4738{4739	struct smb2_file_basic_info *basic_info;4740	struct kstat stat;4741	u64 time;4742	int ret;4743 4744	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {4745		pr_err("no right to read the attributes : 0x%x\n",4746		       fp->daccess);4747		return -EACCES;4748	}4749 4750	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,4751			  AT_STATX_SYNC_AS_STAT);4752	if (ret)4753		return ret;4754 4755	basic_info = (struct smb2_file_basic_info *)rsp->Buffer;4756	basic_info->CreationTime = cpu_to_le64(fp->create_time);4757	time = ksmbd_UnixTimeToNT(stat.atime);4758	basic_info->LastAccessTime = cpu_to_le64(time);4759	time = ksmbd_UnixTimeToNT(stat.mtime);4760	basic_info->LastWriteTime = cpu_to_le64(time);4761	time = ksmbd_UnixTimeToNT(stat.ctime);4762	basic_info->ChangeTime = cpu_to_le64(time);4763	basic_info->Attributes = fp->f_ci->m_fattr;4764	basic_info->Pad1 = 0;4765	rsp->OutputBufferLength =4766		cpu_to_le32(sizeof(struct smb2_file_basic_info));4767	return 0;4768}4769 4770static int get_file_standard_info(struct smb2_query_info_rsp *rsp,4771				  struct ksmbd_file *fp, void *rsp_org)4772{4773	struct smb2_file_standard_info *sinfo;4774	unsigned int delete_pending;4775	struct kstat stat;4776	int ret;4777 4778	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,4779			  AT_STATX_SYNC_AS_STAT);4780	if (ret)4781		return ret;4782 4783	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;4784	delete_pending = ksmbd_inode_pending_delete(fp);4785 4786	sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9);4787	sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);4788	sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);4789	sinfo->DeletePending = delete_pending;4790	sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;4791	rsp->OutputBufferLength =4792		cpu_to_le32(sizeof(struct smb2_file_standard_info));4793 4794	return 0;4795}4796 4797static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,4798				    void *rsp_org)4799{4800	struct smb2_file_alignment_info *file_info;4801 4802	file_info = (struct smb2_file_alignment_info *)rsp->Buffer;4803	file_info->AlignmentRequirement = 0;4804	rsp->OutputBufferLength =4805		cpu_to_le32(sizeof(struct smb2_file_alignment_info));4806}4807 4808static int get_file_all_info(struct ksmbd_work *work,4809			     struct smb2_query_info_rsp *rsp,4810			     struct ksmbd_file *fp,4811			     void *rsp_org)4812{4813	struct ksmbd_conn *conn = work->conn;4814	struct smb2_file_all_info *file_info;4815	unsigned int delete_pending;4816	struct kstat stat;4817	int conv_len;4818	char *filename;4819	u64 time;4820	int ret;4821 4822	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {4823		ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",4824			    fp->daccess);4825		return -EACCES;4826	}4827 4828	filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);4829	if (IS_ERR(filename))4830		return PTR_ERR(filename);4831 4832	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,4833			  AT_STATX_SYNC_AS_STAT);4834	if (ret)4835		return ret;4836 4837	ksmbd_debug(SMB, "filename = %s\n", filename);4838	delete_pending = ksmbd_inode_pending_delete(fp);4839	file_info = (struct smb2_file_all_info *)rsp->Buffer;4840 4841	file_info->CreationTime = cpu_to_le64(fp->create_time);4842	time = ksmbd_UnixTimeToNT(stat.atime);4843	file_info->LastAccessTime = cpu_to_le64(time);4844	time = ksmbd_UnixTimeToNT(stat.mtime);4845	file_info->LastWriteTime = cpu_to_le64(time);4846	time = ksmbd_UnixTimeToNT(stat.ctime);4847	file_info->ChangeTime = cpu_to_le64(time);4848	file_info->Attributes = fp->f_ci->m_fattr;4849	file_info->Pad1 = 0;4850	file_info->AllocationSize =4851		cpu_to_le64(stat.blocks << 9);4852	file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);4853	file_info->NumberOfLinks =4854			cpu_to_le32(get_nlink(&stat) - delete_pending);4855	file_info->DeletePending = delete_pending;4856	file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;4857	file_info->Pad2 = 0;4858	file_info->IndexNumber = cpu_to_le64(stat.ino);4859	file_info->EASize = 0;4860	file_info->AccessFlags = fp->daccess;4861	file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);4862	file_info->Mode = fp->coption;4863	file_info->AlignmentRequirement = 0;4864	conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,4865				     PATH_MAX, conn->local_nls, 0);4866	conv_len *= 2;4867	file_info->FileNameLength = cpu_to_le32(conv_len);4868	rsp->OutputBufferLength =4869		cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);4870	kfree(filename);4871	return 0;4872}4873 4874static void get_file_alternate_info(struct ksmbd_work *work,4875				    struct smb2_query_info_rsp *rsp,4876				    struct ksmbd_file *fp,4877				    void *rsp_org)4878{4879	struct ksmbd_conn *conn = work->conn;4880	struct smb2_file_alt_name_info *file_info;4881	struct dentry *dentry = fp->filp->f_path.dentry;4882	int conv_len;4883 4884	spin_lock(&dentry->d_lock);4885	file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;4886	conv_len = ksmbd_extract_shortname(conn,4887					   dentry->d_name.name,4888					   file_info->FileName);4889	spin_unlock(&dentry->d_lock);4890	file_info->FileNameLength = cpu_to_le32(conv_len);4891	rsp->OutputBufferLength =4892		cpu_to_le32(struct_size(file_info, FileName, conv_len));4893}4894 4895static int get_file_stream_info(struct ksmbd_work *work,4896				struct smb2_query_info_rsp *rsp,4897				struct ksmbd_file *fp,4898				void *rsp_org)4899{4900	struct ksmbd_conn *conn = work->conn;4901	struct smb2_file_stream_info *file_info;4902	char *stream_name, *xattr_list = NULL, *stream_buf;4903	struct kstat stat;4904	const struct path *path = &fp->filp->f_path;4905	ssize_t xattr_list_len;4906	int nbytes = 0, streamlen, stream_name_len, next, idx = 0;4907	int buf_free_len;4908	struct smb2_query_info_req *req = ksmbd_req_buf_next(work);4909	int ret;4910 4911	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,4912			  AT_STATX_SYNC_AS_STAT);4913	if (ret)4914		return ret;4915 4916	file_info = (struct smb2_file_stream_info *)rsp->Buffer;4917 4918	buf_free_len =4919		smb2_calc_max_out_buf_len(work, 8,4920					  le32_to_cpu(req->OutputBufferLength));4921	if (buf_free_len < 0)4922		goto out;4923 4924	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);4925	if (xattr_list_len < 0) {4926		goto out;4927	} else if (!xattr_list_len) {4928		ksmbd_debug(SMB, "empty xattr in the file\n");4929		goto out;4930	}4931 4932	while (idx < xattr_list_len) {4933		stream_name = xattr_list + idx;4934		streamlen = strlen(stream_name);4935		idx += streamlen + 1;4936 4937		ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);4938 4939		if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],4940			    STREAM_PREFIX, STREAM_PREFIX_LEN))4941			continue;4942 4943		stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +4944				STREAM_PREFIX_LEN);4945		streamlen = stream_name_len;4946 4947		/* plus : size */4948		streamlen += 1;4949		stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);4950		if (!stream_buf)4951			break;4952 4953		streamlen = snprintf(stream_buf, streamlen + 1,4954				     ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);4955 4956		next = sizeof(struct smb2_file_stream_info) + streamlen * 2;4957		if (next > buf_free_len) {4958			kfree(stream_buf);4959			break;4960		}4961 4962		file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];4963		streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,4964					       stream_buf, streamlen,4965					       conn->local_nls, 0);4966		streamlen *= 2;4967		kfree(stream_buf);4968		file_info->StreamNameLength = cpu_to_le32(streamlen);4969		file_info->StreamSize = cpu_to_le64(stream_name_len);4970		file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);4971 4972		nbytes += next;4973		buf_free_len -= next;4974		file_info->NextEntryOffset = cpu_to_le32(next);4975	}4976 4977out:4978	if (!S_ISDIR(stat.mode) &&4979	    buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {4980		file_info = (struct smb2_file_stream_info *)4981			&rsp->Buffer[nbytes];4982		streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,4983					      "::$DATA", 7, conn->local_nls, 0);4984		streamlen *= 2;4985		file_info->StreamNameLength = cpu_to_le32(streamlen);4986		file_info->StreamSize = cpu_to_le64(stat.size);4987		file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);4988		nbytes += sizeof(struct smb2_file_stream_info) + streamlen;4989	}4990 4991	/* last entry offset should be 0 */4992	file_info->NextEntryOffset = 0;4993	kvfree(xattr_list);4994 4995	rsp->OutputBufferLength = cpu_to_le32(nbytes);4996 4997	return 0;4998}4999 5000static int get_file_internal_info(struct smb2_query_info_rsp *rsp,5001				  struct ksmbd_file *fp, void *rsp_org)5002{5003	struct smb2_file_internal_info *file_info;5004	struct kstat stat;5005	int ret;5006 5007	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,5008			  AT_STATX_SYNC_AS_STAT);5009	if (ret)5010		return ret;5011 5012	file_info = (struct smb2_file_internal_info *)rsp->Buffer;5013	file_info->IndexNumber = cpu_to_le64(stat.ino);5014	rsp->OutputBufferLength =5015		cpu_to_le32(sizeof(struct smb2_file_internal_info));5016 5017	return 0;5018}5019 5020static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,5021				      struct ksmbd_file *fp, void *rsp_org)5022{5023	struct smb2_file_ntwrk_info *file_info;5024	struct kstat stat;5025	u64 time;5026	int ret;5027 5028	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {5029		pr_err("no right to read the attributes : 0x%x\n",5030		       fp->daccess);5031		return -EACCES;5032	}5033 5034	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,5035			  AT_STATX_SYNC_AS_STAT);5036	if (ret)5037		return ret;5038 5039	file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;5040 5041	file_info->CreationTime = cpu_to_le64(fp->create_time);5042	time = ksmbd_UnixTimeToNT(stat.atime);5043	file_info->LastAccessTime = cpu_to_le64(time);5044	time = ksmbd_UnixTimeToNT(stat.mtime);5045	file_info->LastWriteTime = cpu_to_le64(time);5046	time = ksmbd_UnixTimeToNT(stat.ctime);5047	file_info->ChangeTime = cpu_to_le64(time);5048	file_info->Attributes = fp->f_ci->m_fattr;5049	file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);5050	file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);5051	file_info->Reserved = cpu_to_le32(0);5052	rsp->OutputBufferLength =5053		cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));5054	return 0;5055}5056 5057static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)5058{5059	struct smb2_file_ea_info *file_info;5060 5061	file_info = (struct smb2_file_ea_info *)rsp->Buffer;5062	file_info->EASize = 0;5063	rsp->OutputBufferLength =5064		cpu_to_le32(sizeof(struct smb2_file_ea_info));5065}5066 5067static void get_file_position_info(struct smb2_query_info_rsp *rsp,5068				   struct ksmbd_file *fp, void *rsp_org)5069{5070	struct smb2_file_pos_info *file_info;5071 5072	file_info = (struct smb2_file_pos_info *)rsp->Buffer;5073	file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);5074	rsp->OutputBufferLength =5075		cpu_to_le32(sizeof(struct smb2_file_pos_info));5076}5077 5078static void get_file_mode_info(struct smb2_query_info_rsp *rsp,5079			       struct ksmbd_file *fp, void *rsp_org)5080{5081	struct smb2_file_mode_info *file_info;5082 5083	file_info = (struct smb2_file_mode_info *)rsp->Buffer;5084	file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;5085	rsp->OutputBufferLength =5086		cpu_to_le32(sizeof(struct smb2_file_mode_info));5087}5088 5089static int get_file_compression_info(struct smb2_query_info_rsp *rsp,5090				     struct ksmbd_file *fp, void *rsp_org)5091{5092	struct smb2_file_comp_info *file_info;5093	struct kstat stat;5094	int ret;5095 5096	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,5097			  AT_STATX_SYNC_AS_STAT);5098	if (ret)5099		return ret;5100 5101	file_info = (struct smb2_file_comp_info *)rsp->Buffer;5102	file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);5103	file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;5104	file_info->CompressionUnitShift = 0;5105	file_info->ChunkShift = 0;5106	file_info->ClusterShift = 0;5107	memset(&file_info->Reserved[0], 0, 3);5108 5109	rsp->OutputBufferLength =5110		cpu_to_le32(sizeof(struct smb2_file_comp_info));5111 5112	return 0;5113}5114 5115static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,5116				       struct ksmbd_file *fp, void *rsp_org)5117{5118	struct smb2_file_attr_tag_info *file_info;5119 5120	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {5121		pr_err("no right to read the attributes : 0x%x\n",5122		       fp->daccess);5123		return -EACCES;5124	}5125 5126	file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;5127	file_info->FileAttributes = fp->f_ci->m_fattr;5128	file_info->ReparseTag = 0;5129	rsp->OutputBufferLength =5130		cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));5131	return 0;5132}5133 5134static int find_file_posix_info(struct smb2_query_info_rsp *rsp,5135				struct ksmbd_file *fp, void *rsp_org)5136{5137	struct smb311_posix_qinfo *file_info;5138	struct inode *inode = file_inode(fp->filp);5139	struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);5140	vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);5141	vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);5142	struct kstat stat;5143	u64 time;5144	int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;5145	int ret;5146 5147	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,5148			  AT_STATX_SYNC_AS_STAT);5149	if (ret)5150		return ret;5151 5152	file_info = (struct smb311_posix_qinfo *)rsp->Buffer;5153	file_info->CreationTime = cpu_to_le64(fp->create_time);5154	time = ksmbd_UnixTimeToNT(stat.atime);5155	file_info->LastAccessTime = cpu_to_le64(time);5156	time = ksmbd_UnixTimeToNT(stat.mtime);5157	file_info->LastWriteTime = cpu_to_le64(time);5158	time = ksmbd_UnixTimeToNT(stat.ctime);5159	file_info->ChangeTime = cpu_to_le64(time);5160	file_info->DosAttributes = fp->f_ci->m_fattr;5161	file_info->Inode = cpu_to_le64(stat.ino);5162	file_info->EndOfFile = cpu_to_le64(stat.size);5163	file_info->AllocationSize = cpu_to_le64(stat.blocks << 9);5164	file_info->HardLinks = cpu_to_le32(stat.nlink);5165	file_info->Mode = cpu_to_le32(stat.mode & 0777);5166	file_info->DeviceId = cpu_to_le32(stat.rdev);5167 5168	/*5169	 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).5170	 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +5171	 *		  sub_auth(4 * 1(num_subauth)) + RID(4).5172	 */5173	id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),5174		  SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);5175	id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),5176		  SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);5177 5178	rsp->OutputBufferLength = cpu_to_le32(out_buf_len);5179 5180	return 0;5181}5182 5183static int smb2_get_info_file(struct ksmbd_work *work,5184			      struct smb2_query_info_req *req,5185			      struct smb2_query_info_rsp *rsp)5186{5187	struct ksmbd_file *fp;5188	int fileinfoclass = 0;5189	int rc = 0;5190	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;5191 5192	if (test_share_config_flag(work->tcon->share_conf,5193				   KSMBD_SHARE_FLAG_PIPE)) {5194		/* smb2 info file called for pipe */5195		return smb2_get_info_file_pipe(work->sess, req, rsp,5196					       work->response_buf);5197	}5198 5199	if (work->next_smb2_rcv_hdr_off) {5200		if (!has_file_id(req->VolatileFileId)) {5201			ksmbd_debug(SMB, "Compound request set FID = %llu\n",5202				    work->compound_fid);5203			id = work->compound_fid;5204			pid = work->compound_pfid;5205		}5206	}5207 5208	if (!has_file_id(id)) {5209		id = req->VolatileFileId;5210		pid = req->PersistentFileId;5211	}5212 5213	fp = ksmbd_lookup_fd_slow(work, id, pid);5214	if (!fp)5215		return -ENOENT;5216 5217	fileinfoclass = req->FileInfoClass;5218 5219	switch (fileinfoclass) {5220	case FILE_ACCESS_INFORMATION:5221		get_file_access_info(rsp, fp, work->response_buf);5222		break;5223 5224	case FILE_BASIC_INFORMATION:5225		rc = get_file_basic_info(rsp, fp, work->response_buf);5226		break;5227 5228	case FILE_STANDARD_INFORMATION:5229		rc = get_file_standard_info(rsp, fp, work->response_buf);5230		break;5231 5232	case FILE_ALIGNMENT_INFORMATION:5233		get_file_alignment_info(rsp, work->response_buf);5234		break;5235 5236	case FILE_ALL_INFORMATION:5237		rc = get_file_all_info(work, rsp, fp, work->response_buf);5238		break;5239 5240	case FILE_ALTERNATE_NAME_INFORMATION:5241		get_file_alternate_info(work, rsp, fp, work->response_buf);5242		break;5243 5244	case FILE_STREAM_INFORMATION:5245		rc = get_file_stream_info(work, rsp, fp, work->response_buf);5246		break;5247 5248	case FILE_INTERNAL_INFORMATION:5249		rc = get_file_internal_info(rsp, fp, work->response_buf);5250		break;5251 5252	case FILE_NETWORK_OPEN_INFORMATION:5253		rc = get_file_network_open_info(rsp, fp, work->response_buf);5254		break;5255 5256	case FILE_EA_INFORMATION:5257		get_file_ea_info(rsp, work->response_buf);5258		break;5259 5260	case FILE_FULL_EA_INFORMATION:5261		rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);5262		break;5263 5264	case FILE_POSITION_INFORMATION:5265		get_file_position_info(rsp, fp, work->response_buf);5266		break;5267 5268	case FILE_MODE_INFORMATION:5269		get_file_mode_info(rsp, fp, work->response_buf);5270		break;5271 5272	case FILE_COMPRESSION_INFORMATION:5273		rc = get_file_compression_info(rsp, fp, work->response_buf);5274		break;5275 5276	case FILE_ATTRIBUTE_TAG_INFORMATION:5277		rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);5278		break;5279	case SMB_FIND_FILE_POSIX_INFO:5280		if (!work->tcon->posix_extensions) {5281			pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");5282			rc = -EOPNOTSUPP;5283		} else {5284			rc = find_file_posix_info(rsp, fp, work->response_buf);5285		}5286		break;5287	default:5288		ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",5289			    fileinfoclass);5290		rc = -EOPNOTSUPP;5291	}5292	if (!rc)5293		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),5294				      rsp, work->response_buf);5295	ksmbd_fd_put(work, fp);5296	return rc;5297}5298 5299static int smb2_get_info_filesystem(struct ksmbd_work *work,5300				    struct smb2_query_info_req *req,5301				    struct smb2_query_info_rsp *rsp)5302{5303	struct ksmbd_session *sess = work->sess;5304	struct ksmbd_conn *conn = work->conn;5305	struct ksmbd_share_config *share = work->tcon->share_conf;5306	int fsinfoclass = 0;5307	struct kstatfs stfs;5308	struct path path;5309	int rc = 0, len;5310 5311	if (!share->path)5312		return -EIO;5313 5314	rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);5315	if (rc) {5316		pr_err("cannot create vfs path\n");5317		return -EIO;5318	}5319 5320	rc = vfs_statfs(&path, &stfs);5321	if (rc) {5322		pr_err("cannot do stat of path %s\n", share->path);5323		path_put(&path);5324		return -EIO;5325	}5326 5327	fsinfoclass = req->FileInfoClass;5328 5329	switch (fsinfoclass) {5330	case FS_DEVICE_INFORMATION:5331	{5332		struct filesystem_device_info *info;5333 5334		info = (struct filesystem_device_info *)rsp->Buffer;5335 5336		info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK);5337		info->DeviceCharacteristics =5338			cpu_to_le32(FILE_DEVICE_IS_MOUNTED);5339		if (!test_tree_conn_flag(work->tcon,5340					 KSMBD_TREE_CONN_FLAG_WRITABLE))5341			info->DeviceCharacteristics |=5342				cpu_to_le32(FILE_READ_ONLY_DEVICE);5343		rsp->OutputBufferLength = cpu_to_le32(8);5344		break;5345	}5346	case FS_ATTRIBUTE_INFORMATION:5347	{5348		struct filesystem_attribute_info *info;5349		size_t sz;5350 5351		info = (struct filesystem_attribute_info *)rsp->Buffer;5352		info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |5353					       FILE_PERSISTENT_ACLS |5354					       FILE_UNICODE_ON_DISK |5355					       FILE_CASE_PRESERVED_NAMES |5356					       FILE_CASE_SENSITIVE_SEARCH |5357					       FILE_SUPPORTS_BLOCK_REFCOUNTING);5358 5359		info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);5360 5361		if (test_share_config_flag(work->tcon->share_conf,5362		    KSMBD_SHARE_FLAG_STREAMS))5363			info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);5364 5365		info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);5366		len = smbConvertToUTF16((__le16 *)info->FileSystemName,5367					"NTFS", PATH_MAX, conn->local_nls, 0);5368		len = len * 2;5369		info->FileSystemNameLen = cpu_to_le32(len);5370		sz = sizeof(struct filesystem_attribute_info) + len;5371		rsp->OutputBufferLength = cpu_to_le32(sz);5372		break;5373	}5374	case FS_VOLUME_INFORMATION:5375	{5376		struct filesystem_vol_info *info;5377		size_t sz;5378		unsigned int serial_crc = 0;5379 5380		info = (struct filesystem_vol_info *)(rsp->Buffer);5381		info->VolumeCreationTime = 0;5382		serial_crc = crc32_le(serial_crc, share->name,5383				      strlen(share->name));5384		serial_crc = crc32_le(serial_crc, share->path,5385				      strlen(share->path));5386		serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),5387				      strlen(ksmbd_netbios_name()));5388		/* Taking dummy value of serial number*/5389		info->SerialNumber = cpu_to_le32(serial_crc);5390		len = smbConvertToUTF16((__le16 *)info->VolumeLabel,5391					share->name, PATH_MAX,5392					conn->local_nls, 0);5393		len = len * 2;5394		info->VolumeLabelSize = cpu_to_le32(len);5395		info->Reserved = 0;5396		sz = sizeof(struct filesystem_vol_info) + len;5397		rsp->OutputBufferLength = cpu_to_le32(sz);5398		break;5399	}5400	case FS_SIZE_INFORMATION:5401	{5402		struct filesystem_info *info;5403 5404		info = (struct filesystem_info *)(rsp->Buffer);5405		info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);5406		info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);5407		info->SectorsPerAllocationUnit = cpu_to_le32(1);5408		info->BytesPerSector = cpu_to_le32(stfs.f_bsize);5409		rsp->OutputBufferLength = cpu_to_le32(24);5410		break;5411	}5412	case FS_FULL_SIZE_INFORMATION:5413	{5414		struct smb2_fs_full_size_info *info;5415 5416		info = (struct smb2_fs_full_size_info *)(rsp->Buffer);5417		info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);5418		info->CallerAvailableAllocationUnits =5419					cpu_to_le64(stfs.f_bavail);5420		info->ActualAvailableAllocationUnits =5421					cpu_to_le64(stfs.f_bfree);5422		info->SectorsPerAllocationUnit = cpu_to_le32(1);5423		info->BytesPerSector = cpu_to_le32(stfs.f_bsize);5424		rsp->OutputBufferLength = cpu_to_le32(32);5425		break;5426	}5427	case FS_OBJECT_ID_INFORMATION:5428	{5429		struct object_id_info *info;5430 5431		info = (struct object_id_info *)(rsp->Buffer);5432 5433		if (!user_guest(sess->user))5434			memcpy(info->objid, user_passkey(sess->user), 16);5435		else5436			memset(info->objid, 0, 16);5437 5438		info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);5439		info->extended_info.version = cpu_to_le32(1);5440		info->extended_info.release = cpu_to_le32(1);5441		info->extended_info.rel_date = 0;5442		memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));5443		rsp->OutputBufferLength = cpu_to_le32(64);5444		break;5445	}5446	case FS_SECTOR_SIZE_INFORMATION:5447	{5448		struct smb3_fs_ss_info *info;5449		unsigned int sector_size =5450			min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);5451 5452		info = (struct smb3_fs_ss_info *)(rsp->Buffer);5453 5454		info->LogicalBytesPerSector = cpu_to_le32(sector_size);5455		info->PhysicalBytesPerSectorForAtomicity =5456				cpu_to_le32(sector_size);5457		info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);5458		info->FSEffPhysicalBytesPerSectorForAtomicity =5459				cpu_to_le32(sector_size);5460		info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |5461				    SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);5462		info->ByteOffsetForSectorAlignment = 0;5463		info->ByteOffsetForPartitionAlignment = 0;5464		rsp->OutputBufferLength = cpu_to_le32(28);5465		break;5466	}5467	case FS_CONTROL_INFORMATION:5468	{5469		/*5470		 * TODO : The current implementation is based on5471		 * test result with win7(NTFS) server. It's need to5472		 * modify this to get valid Quota values5473		 * from Linux kernel5474		 */5475		struct smb2_fs_control_info *info;5476 5477		info = (struct smb2_fs_control_info *)(rsp->Buffer);5478		info->FreeSpaceStartFiltering = 0;5479		info->FreeSpaceThreshold = 0;5480		info->FreeSpaceStopFiltering = 0;5481		info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);5482		info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);5483		info->Padding = 0;5484		rsp->OutputBufferLength = cpu_to_le32(48);5485		break;5486	}5487	case FS_POSIX_INFORMATION:5488	{5489		struct filesystem_posix_info *info;5490 5491		if (!work->tcon->posix_extensions) {5492			pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");5493			rc = -EOPNOTSUPP;5494		} else {5495			info = (struct filesystem_posix_info *)(rsp->Buffer);5496			info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);5497			info->BlockSize = cpu_to_le32(stfs.f_bsize);5498			info->TotalBlocks = cpu_to_le64(stfs.f_blocks);5499			info->BlocksAvail = cpu_to_le64(stfs.f_bfree);5500			info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);5501			info->TotalFileNodes = cpu_to_le64(stfs.f_files);5502			info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);5503			rsp->OutputBufferLength = cpu_to_le32(56);5504		}5505		break;5506	}5507	default:5508		path_put(&path);5509		return -EOPNOTSUPP;5510	}5511	rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),5512			      rsp, work->response_buf);5513	path_put(&path);5514	return rc;5515}5516 5517static int smb2_get_info_sec(struct ksmbd_work *work,5518			     struct smb2_query_info_req *req,5519			     struct smb2_query_info_rsp *rsp)5520{5521	struct ksmbd_file *fp;5522	struct mnt_idmap *idmap;5523	struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;5524	struct smb_fattr fattr = {{0}};5525	struct inode *inode;5526	__u32 secdesclen = 0;5527	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;5528	int addition_info = le32_to_cpu(req->AdditionalInformation);5529	int rc = 0, ppntsd_size = 0;5530 5531	if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |5532			      PROTECTED_DACL_SECINFO |5533			      UNPROTECTED_DACL_SECINFO)) {5534		ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",5535		       addition_info);5536 5537		pntsd->revision = cpu_to_le16(1);5538		pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);5539		pntsd->osidoffset = 0;5540		pntsd->gsidoffset = 0;5541		pntsd->sacloffset = 0;5542		pntsd->dacloffset = 0;5543 5544		secdesclen = sizeof(struct smb_ntsd);5545		rsp->OutputBufferLength = cpu_to_le32(secdesclen);5546 5547		return 0;5548	}5549 5550	if (work->next_smb2_rcv_hdr_off) {5551		if (!has_file_id(req->VolatileFileId)) {5552			ksmbd_debug(SMB, "Compound request set FID = %llu\n",5553				    work->compound_fid);5554			id = work->compound_fid;5555			pid = work->compound_pfid;5556		}5557	}5558 5559	if (!has_file_id(id)) {5560		id = req->VolatileFileId;5561		pid = req->PersistentFileId;5562	}5563 5564	fp = ksmbd_lookup_fd_slow(work, id, pid);5565	if (!fp)5566		return -ENOENT;5567 5568	idmap = file_mnt_idmap(fp->filp);5569	inode = file_inode(fp->filp);5570	ksmbd_acls_fattr(&fattr, idmap, inode);5571 5572	if (test_share_config_flag(work->tcon->share_conf,5573				   KSMBD_SHARE_FLAG_ACL_XATTR))5574		ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,5575						     fp->filp->f_path.dentry,5576						     &ppntsd);5577 5578	/* Check if sd buffer size exceeds response buffer size */5579	if (smb2_resp_buf_len(work, 8) > ppntsd_size)5580		rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,5581				    addition_info, &secdesclen, &fattr);5582	posix_acl_release(fattr.cf_acls);5583	posix_acl_release(fattr.cf_dacls);5584	kfree(ppntsd);5585	ksmbd_fd_put(work, fp);5586	if (rc)5587		return rc;5588 5589	rsp->OutputBufferLength = cpu_to_le32(secdesclen);5590	return 0;5591}5592 5593/**5594 * smb2_query_info() - handler for smb2 query info command5595 * @work:	smb work containing query info request buffer5596 *5597 * Return:	0 on success, otherwise error5598 */5599int smb2_query_info(struct ksmbd_work *work)5600{5601	struct smb2_query_info_req *req;5602	struct smb2_query_info_rsp *rsp;5603	int rc = 0;5604 5605	WORK_BUFFERS(work, req, rsp);5606 5607	ksmbd_debug(SMB, "GOT query info request\n");5608 5609	if (ksmbd_override_fsids(work)) {5610		rc = -ENOMEM;5611		goto err_out;5612	}5613 5614	switch (req->InfoType) {5615	case SMB2_O_INFO_FILE:5616		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");5617		rc = smb2_get_info_file(work, req, rsp);5618		break;5619	case SMB2_O_INFO_FILESYSTEM:5620		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");5621		rc = smb2_get_info_filesystem(work, req, rsp);5622		break;5623	case SMB2_O_INFO_SECURITY:5624		ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");5625		rc = smb2_get_info_sec(work, req, rsp);5626		break;5627	default:5628		ksmbd_debug(SMB, "InfoType %d not supported yet\n",5629			    req->InfoType);5630		rc = -EOPNOTSUPP;5631	}5632	ksmbd_revert_fsids(work);5633 5634	if (!rc) {5635		rsp->StructureSize = cpu_to_le16(9);5636		rsp->OutputBufferOffset = cpu_to_le16(72);5637		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,5638				       offsetof(struct smb2_query_info_rsp, Buffer) +5639					le32_to_cpu(rsp->OutputBufferLength));5640	}5641 5642err_out:5643	if (rc < 0) {5644		if (rc == -EACCES)5645			rsp->hdr.Status = STATUS_ACCESS_DENIED;5646		else if (rc == -ENOENT)5647			rsp->hdr.Status = STATUS_FILE_CLOSED;5648		else if (rc == -EIO)5649			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;5650		else if (rc == -ENOMEM)5651			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;5652		else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)5653			rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;5654		smb2_set_err_rsp(work);5655 5656		ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",5657			    rc);5658		return rc;5659	}5660	return 0;5661}5662 5663/**5664 * smb2_close_pipe() - handler for closing IPC pipe5665 * @work:	smb work containing close request buffer5666 *5667 * Return:	05668 */5669static noinline int smb2_close_pipe(struct ksmbd_work *work)5670{5671	u64 id;5672	struct smb2_close_req *req;5673	struct smb2_close_rsp *rsp;5674 5675	WORK_BUFFERS(work, req, rsp);5676 5677	id = req->VolatileFileId;5678	ksmbd_session_rpc_close(work->sess, id);5679 5680	rsp->StructureSize = cpu_to_le16(60);5681	rsp->Flags = 0;5682	rsp->Reserved = 0;5683	rsp->CreationTime = 0;5684	rsp->LastAccessTime = 0;5685	rsp->LastWriteTime = 0;5686	rsp->ChangeTime = 0;5687	rsp->AllocationSize = 0;5688	rsp->EndOfFile = 0;5689	rsp->Attributes = 0;5690 5691	return ksmbd_iov_pin_rsp(work, (void *)rsp,5692				 sizeof(struct smb2_close_rsp));5693}5694 5695/**5696 * smb2_close() - handler for smb2 close file command5697 * @work:	smb work containing close request buffer5698 *5699 * Return:	05700 */5701int smb2_close(struct ksmbd_work *work)5702{5703	u64 volatile_id = KSMBD_NO_FID;5704	u64 sess_id;5705	struct smb2_close_req *req;5706	struct smb2_close_rsp *rsp;5707	struct ksmbd_conn *conn = work->conn;5708	struct ksmbd_file *fp;5709	u64 time;5710	int err = 0;5711 5712	WORK_BUFFERS(work, req, rsp);5713 5714	if (test_share_config_flag(work->tcon->share_conf,5715				   KSMBD_SHARE_FLAG_PIPE)) {5716		ksmbd_debug(SMB, "IPC pipe close request\n");5717		return smb2_close_pipe(work);5718	}5719 5720	sess_id = le64_to_cpu(req->hdr.SessionId);5721	if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)5722		sess_id = work->compound_sid;5723 5724	work->compound_sid = 0;5725	if (check_session_id(conn, sess_id)) {5726		work->compound_sid = sess_id;5727	} else {5728		rsp->hdr.Status = STATUS_USER_SESSION_DELETED;5729		if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)5730			rsp->hdr.Status = STATUS_INVALID_PARAMETER;5731		err = -EBADF;5732		goto out;5733	}5734 5735	if (work->next_smb2_rcv_hdr_off &&5736	    !has_file_id(req->VolatileFileId)) {5737		if (!has_file_id(work->compound_fid)) {5738			/* file already closed, return FILE_CLOSED */5739			ksmbd_debug(SMB, "file already closed\n");5740			rsp->hdr.Status = STATUS_FILE_CLOSED;5741			err = -EBADF;5742			goto out;5743		} else {5744			ksmbd_debug(SMB,5745				    "Compound request set FID = %llu:%llu\n",5746				    work->compound_fid,5747				    work->compound_pfid);5748			volatile_id = work->compound_fid;5749 5750			/* file closed, stored id is not valid anymore */5751			work->compound_fid = KSMBD_NO_FID;5752			work->compound_pfid = KSMBD_NO_FID;5753		}5754	} else {5755		volatile_id = req->VolatileFileId;5756	}5757	ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);5758 5759	rsp->StructureSize = cpu_to_le16(60);5760	rsp->Reserved = 0;5761 5762	if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {5763		struct kstat stat;5764		int ret;5765 5766		fp = ksmbd_lookup_fd_fast(work, volatile_id);5767		if (!fp) {5768			err = -ENOENT;5769			goto out;5770		}5771 5772		ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,5773				  AT_STATX_SYNC_AS_STAT);5774		if (ret) {5775			ksmbd_fd_put(work, fp);5776			goto out;5777		}5778 5779		rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;5780		rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :5781			cpu_to_le64(stat.blocks << 9);5782		rsp->EndOfFile = cpu_to_le64(stat.size);5783		rsp->Attributes = fp->f_ci->m_fattr;5784		rsp->CreationTime = cpu_to_le64(fp->create_time);5785		time = ksmbd_UnixTimeToNT(stat.atime);5786		rsp->LastAccessTime = cpu_to_le64(time);5787		time = ksmbd_UnixTimeToNT(stat.mtime);5788		rsp->LastWriteTime = cpu_to_le64(time);5789		time = ksmbd_UnixTimeToNT(stat.ctime);5790		rsp->ChangeTime = cpu_to_le64(time);5791		ksmbd_fd_put(work, fp);5792	} else {5793		rsp->Flags = 0;5794		rsp->AllocationSize = 0;5795		rsp->EndOfFile = 0;5796		rsp->Attributes = 0;5797		rsp->CreationTime = 0;5798		rsp->LastAccessTime = 0;5799		rsp->LastWriteTime = 0;5800		rsp->ChangeTime = 0;5801	}5802 5803	err = ksmbd_close_fd(work, volatile_id);5804out:5805	if (!err)5806		err = ksmbd_iov_pin_rsp(work, (void *)rsp,5807					sizeof(struct smb2_close_rsp));5808 5809	if (err) {5810		if (rsp->hdr.Status == 0)5811			rsp->hdr.Status = STATUS_FILE_CLOSED;5812		smb2_set_err_rsp(work);5813	}5814 5815	return err;5816}5817 5818/**5819 * smb2_echo() - handler for smb2 echo(ping) command5820 * @work:	smb work containing echo request buffer5821 *5822 * Return:	05823 */5824int smb2_echo(struct ksmbd_work *work)5825{5826	struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);5827 5828	if (work->next_smb2_rcv_hdr_off)5829		rsp = ksmbd_resp_buf_next(work);5830 5831	rsp->StructureSize = cpu_to_le16(4);5832	rsp->Reserved = 0;5833	return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));5834}5835 5836static int smb2_rename(struct ksmbd_work *work,5837		       struct ksmbd_file *fp,5838		       struct smb2_file_rename_info *file_info,5839		       struct nls_table *local_nls)5840{5841	struct ksmbd_share_config *share = fp->tcon->share_conf;5842	char *new_name = NULL;5843	int rc, flags = 0;5844 5845	ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");5846	new_name = smb2_get_name(file_info->FileName,5847				 le32_to_cpu(file_info->FileNameLength),5848				 local_nls);5849	if (IS_ERR(new_name))5850		return PTR_ERR(new_name);5851 5852	if (strchr(new_name, ':')) {5853		int s_type;5854		char *xattr_stream_name, *stream_name = NULL;5855		size_t xattr_stream_size;5856		int len;5857 5858		rc = parse_stream_name(new_name, &stream_name, &s_type);5859		if (rc < 0)5860			goto out;5861 5862		len = strlen(new_name);5863		if (len > 0 && new_name[len - 1] != '/') {5864			pr_err("not allow base filename in rename\n");5865			rc = -ESHARE;5866			goto out;5867		}5868 5869		rc = ksmbd_vfs_xattr_stream_name(stream_name,5870						 &xattr_stream_name,5871						 &xattr_stream_size,5872						 s_type);5873		if (rc)5874			goto out;5875 5876		rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),5877					&fp->filp->f_path,5878					xattr_stream_name,5879					NULL, 0, 0, true);5880		if (rc < 0) {5881			pr_err("failed to store stream name in xattr: %d\n",5882			       rc);5883			rc = -EINVAL;5884			goto out;5885		}5886 5887		goto out;5888	}5889 5890	ksmbd_debug(SMB, "new name %s\n", new_name);5891	if (ksmbd_share_veto_filename(share, new_name)) {5892		rc = -ENOENT;5893		ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);5894		goto out;5895	}5896 5897	if (!file_info->ReplaceIfExists)5898		flags = RENAME_NOREPLACE;5899 5900	rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);5901	if (!rc)5902		smb_break_all_levII_oplock(work, fp, 0);5903out:5904	kfree(new_name);5905	return rc;5906}5907 5908static int smb2_create_link(struct ksmbd_work *work,5909			    struct ksmbd_share_config *share,5910			    struct smb2_file_link_info *file_info,5911			    unsigned int buf_len, struct file *filp,5912			    struct nls_table *local_nls)5913{5914	char *link_name = NULL, *target_name = NULL, *pathname = NULL;5915	struct path path, parent_path;5916	bool file_present = false;5917	int rc;5918 5919	if (buf_len < (u64)sizeof(struct smb2_file_link_info) +5920			le32_to_cpu(file_info->FileNameLength))5921		return -EINVAL;5922 5923	ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");5924	pathname = kmalloc(PATH_MAX, GFP_KERNEL);5925	if (!pathname)5926		return -ENOMEM;5927 5928	link_name = smb2_get_name(file_info->FileName,5929				  le32_to_cpu(file_info->FileNameLength),5930				  local_nls);5931	if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {5932		rc = -EINVAL;5933		goto out;5934	}5935 5936	ksmbd_debug(SMB, "link name is %s\n", link_name);5937	target_name = file_path(filp, pathname, PATH_MAX);5938	if (IS_ERR(target_name)) {5939		rc = -EINVAL;5940		goto out;5941	}5942 5943	ksmbd_debug(SMB, "target name is %s\n", target_name);5944	rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,5945					&parent_path, &path, 0);5946	if (rc) {5947		if (rc != -ENOENT)5948			goto out;5949	} else5950		file_present = true;5951 5952	if (file_info->ReplaceIfExists) {5953		if (file_present) {5954			rc = ksmbd_vfs_remove_file(work, &path);5955			if (rc) {5956				rc = -EINVAL;5957				ksmbd_debug(SMB, "cannot delete %s\n",5958					    link_name);5959				goto out;5960			}5961		}5962	} else {5963		if (file_present) {5964			rc = -EEXIST;5965			ksmbd_debug(SMB, "link already exists\n");5966			goto out;5967		}5968	}5969 5970	rc = ksmbd_vfs_link(work, target_name, link_name);5971	if (rc)5972		rc = -EINVAL;5973out:5974	if (file_present)5975		ksmbd_vfs_kern_path_unlock(&parent_path, &path);5976 5977	if (!IS_ERR(link_name))5978		kfree(link_name);5979	kfree(pathname);5980	return rc;5981}5982 5983static int set_file_basic_info(struct ksmbd_file *fp,5984			       struct smb2_file_basic_info *file_info,5985			       struct ksmbd_share_config *share)5986{5987	struct iattr attrs;5988	struct file *filp;5989	struct inode *inode;5990	struct mnt_idmap *idmap;5991	int rc = 0;5992 5993	if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))5994		return -EACCES;5995 5996	attrs.ia_valid = 0;5997	filp = fp->filp;5998	inode = file_inode(filp);5999	idmap = file_mnt_idmap(filp);6000 6001	if (file_info->CreationTime)6002		fp->create_time = le64_to_cpu(file_info->CreationTime);6003 6004	if (file_info->LastAccessTime) {6005		attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);6006		attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);6007	}6008 6009	attrs.ia_valid |= ATTR_CTIME;6010	if (file_info->ChangeTime)6011		attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);6012	else6013		attrs.ia_ctime = inode_get_ctime(inode);6014 6015	if (file_info->LastWriteTime) {6016		attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);6017		attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);6018	}6019 6020	if (file_info->Attributes) {6021		if (!S_ISDIR(inode->i_mode) &&6022		    file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {6023			pr_err("can't change a file to a directory\n");6024			return -EINVAL;6025		}6026 6027		if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))6028			fp->f_ci->m_fattr = file_info->Attributes |6029				(fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);6030	}6031 6032	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&6033	    (file_info->CreationTime || file_info->Attributes)) {6034		struct xattr_dos_attrib da = {0};6035 6036		da.version = 4;6037		da.itime = fp->itime;6038		da.create_time = fp->create_time;6039		da.attr = le32_to_cpu(fp->f_ci->m_fattr);6040		da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |6041			XATTR_DOSINFO_ITIME;6042 6043		rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,6044				true);6045		if (rc)6046			ksmbd_debug(SMB,6047				    "failed to restore file attribute in EA\n");6048		rc = 0;6049	}6050 6051	if (attrs.ia_valid) {6052		struct dentry *dentry = filp->f_path.dentry;6053		struct inode *inode = d_inode(dentry);6054 6055		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))6056			return -EACCES;6057 6058		inode_lock(inode);6059		inode_set_ctime_to_ts(inode, attrs.ia_ctime);6060		attrs.ia_valid &= ~ATTR_CTIME;6061		rc = notify_change(idmap, dentry, &attrs, NULL);6062		inode_unlock(inode);6063	}6064	return rc;6065}6066 6067static int set_file_allocation_info(struct ksmbd_work *work,6068				    struct ksmbd_file *fp,6069				    struct smb2_file_alloc_info *file_alloc_info)6070{6071	/*6072	 * TODO : It's working fine only when store dos attributes6073	 * is not yes. need to implement a logic which works6074	 * properly with any smb.conf option6075	 */6076 6077	loff_t alloc_blks;6078	struct inode *inode;6079	struct kstat stat;6080	int rc;6081 6082	if (!(fp->daccess & FILE_WRITE_DATA_LE))6083		return -EACCES;6084 6085	rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,6086			 AT_STATX_SYNC_AS_STAT);6087	if (rc)6088		return rc;6089 6090	alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;6091	inode = file_inode(fp->filp);6092 6093	if (alloc_blks > stat.blocks) {6094		smb_break_all_levII_oplock(work, fp, 1);6095		rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,6096				   alloc_blks * 512);6097		if (rc && rc != -EOPNOTSUPP) {6098			pr_err("vfs_fallocate is failed : %d\n", rc);6099			return rc;6100		}6101	} else if (alloc_blks < stat.blocks) {6102		loff_t size;6103 6104		/*6105		 * Allocation size could be smaller than original one6106		 * which means allocated blocks in file should be6107		 * deallocated. use truncate to cut out it, but inode6108		 * size is also updated with truncate offset.6109		 * inode size is retained by backup inode size.6110		 */6111		size = i_size_read(inode);6112		rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);6113		if (rc) {6114			pr_err("truncate failed!, err %d\n", rc);6115			return rc;6116		}6117		if (size < alloc_blks * 512)6118			i_size_write(inode, size);6119	}6120	return 0;6121}6122 6123static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,6124				struct smb2_file_eof_info *file_eof_info)6125{6126	loff_t newsize;6127	struct inode *inode;6128	int rc;6129 6130	if (!(fp->daccess & FILE_WRITE_DATA_LE))6131		return -EACCES;6132 6133	newsize = le64_to_cpu(file_eof_info->EndOfFile);6134	inode = file_inode(fp->filp);6135 6136	/*6137	 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called6138	 * on FAT32 shared device, truncate execution time is too long6139	 * and network error could cause from windows client. because6140	 * truncate of some filesystem like FAT32 fill zero data in6141	 * truncated range.6142	 */6143	if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {6144		ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);6145		rc = ksmbd_vfs_truncate(work, fp, newsize);6146		if (rc) {6147			ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);6148			if (rc != -EAGAIN)6149				rc = -EBADF;6150			return rc;6151		}6152	}6153	return 0;6154}6155 6156static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,6157			   struct smb2_file_rename_info *rename_info,6158			   unsigned int buf_len)6159{6160	if (!(fp->daccess & FILE_DELETE_LE)) {6161		pr_err("no right to delete : 0x%x\n", fp->daccess);6162		return -EACCES;6163	}6164 6165	if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +6166			le32_to_cpu(rename_info->FileNameLength))6167		return -EINVAL;6168 6169	if (!le32_to_cpu(rename_info->FileNameLength))6170		return -EINVAL;6171 6172	return smb2_rename(work, fp, rename_info, work->conn->local_nls);6173}6174 6175static int set_file_disposition_info(struct ksmbd_file *fp,6176				     struct smb2_file_disposition_info *file_info)6177{6178	struct inode *inode;6179 6180	if (!(fp->daccess & FILE_DELETE_LE)) {6181		pr_err("no right to delete : 0x%x\n", fp->daccess);6182		return -EACCES;6183	}6184 6185	inode = file_inode(fp->filp);6186	if (file_info->DeletePending) {6187		if (S_ISDIR(inode->i_mode) &&6188		    ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)6189			return -EBUSY;6190		ksmbd_set_inode_pending_delete(fp);6191	} else {6192		ksmbd_clear_inode_pending_delete(fp);6193	}6194	return 0;6195}6196 6197static int set_file_position_info(struct ksmbd_file *fp,6198				  struct smb2_file_pos_info *file_info)6199{6200	loff_t current_byte_offset;6201	unsigned long sector_size;6202	struct inode *inode;6203 6204	inode = file_inode(fp->filp);6205	current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);6206	sector_size = inode->i_sb->s_blocksize;6207 6208	if (current_byte_offset < 0 ||6209	    (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&6210	     current_byte_offset & (sector_size - 1))) {6211		pr_err("CurrentByteOffset is not valid : %llu\n",6212		       current_byte_offset);6213		return -EINVAL;6214	}6215 6216	fp->filp->f_pos = current_byte_offset;6217	return 0;6218}6219 6220static int set_file_mode_info(struct ksmbd_file *fp,6221			      struct smb2_file_mode_info *file_info)6222{6223	__le32 mode;6224 6225	mode = file_info->Mode;6226 6227	if ((mode & ~FILE_MODE_INFO_MASK)) {6228		pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));6229		return -EINVAL;6230	}6231 6232	/*6233	 * TODO : need to implement consideration for6234	 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT6235	 */6236	ksmbd_vfs_set_fadvise(fp->filp, mode);6237	fp->coption = mode;6238	return 0;6239}6240 6241/**6242 * smb2_set_info_file() - handler for smb2 set info command6243 * @work:	smb work containing set info command buffer6244 * @fp:		ksmbd_file pointer6245 * @req:	request buffer pointer6246 * @share:	ksmbd_share_config pointer6247 *6248 * Return:	0 on success, otherwise error6249 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH6250 */6251static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,6252			      struct smb2_set_info_req *req,6253			      struct ksmbd_share_config *share)6254{6255	unsigned int buf_len = le32_to_cpu(req->BufferLength);6256	char *buffer = (char *)req + le16_to_cpu(req->BufferOffset);6257 6258	switch (req->FileInfoClass) {6259	case FILE_BASIC_INFORMATION:6260	{6261		if (buf_len < sizeof(struct smb2_file_basic_info))6262			return -EINVAL;6263 6264		return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share);6265	}6266	case FILE_ALLOCATION_INFORMATION:6267	{6268		if (buf_len < sizeof(struct smb2_file_alloc_info))6269			return -EINVAL;6270 6271		return set_file_allocation_info(work, fp,6272						(struct smb2_file_alloc_info *)buffer);6273	}6274	case FILE_END_OF_FILE_INFORMATION:6275	{6276		if (buf_len < sizeof(struct smb2_file_eof_info))6277			return -EINVAL;6278 6279		return set_end_of_file_info(work, fp,6280					    (struct smb2_file_eof_info *)buffer);6281	}6282	case FILE_RENAME_INFORMATION:6283	{6284		if (buf_len < sizeof(struct smb2_file_rename_info))6285			return -EINVAL;6286 6287		return set_rename_info(work, fp,6288				       (struct smb2_file_rename_info *)buffer,6289				       buf_len);6290	}6291	case FILE_LINK_INFORMATION:6292	{6293		if (buf_len < sizeof(struct smb2_file_link_info))6294			return -EINVAL;6295 6296		return smb2_create_link(work, work->tcon->share_conf,6297					(struct smb2_file_link_info *)buffer,6298					buf_len, fp->filp,6299					work->conn->local_nls);6300	}6301	case FILE_DISPOSITION_INFORMATION:6302	{6303		if (buf_len < sizeof(struct smb2_file_disposition_info))6304			return -EINVAL;6305 6306		return set_file_disposition_info(fp,6307						 (struct smb2_file_disposition_info *)buffer);6308	}6309	case FILE_FULL_EA_INFORMATION:6310	{6311		if (!(fp->daccess & FILE_WRITE_EA_LE)) {6312			pr_err("Not permitted to write ext  attr: 0x%x\n",6313			       fp->daccess);6314			return -EACCES;6315		}6316 6317		if (buf_len < sizeof(struct smb2_ea_info))6318			return -EINVAL;6319 6320		return smb2_set_ea((struct smb2_ea_info *)buffer,6321				   buf_len, &fp->filp->f_path, true);6322	}6323	case FILE_POSITION_INFORMATION:6324	{6325		if (buf_len < sizeof(struct smb2_file_pos_info))6326			return -EINVAL;6327 6328		return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer);6329	}6330	case FILE_MODE_INFORMATION:6331	{6332		if (buf_len < sizeof(struct smb2_file_mode_info))6333			return -EINVAL;6334 6335		return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer);6336	}6337	}6338 6339	pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);6340	return -EOPNOTSUPP;6341}6342 6343static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,6344			     char *buffer, int buf_len)6345{6346	struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;6347 6348	fp->saccess |= FILE_SHARE_DELETE_LE;6349 6350	return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,6351			buf_len, false, true);6352}6353 6354/**6355 * smb2_set_info() - handler for smb2 set info command handler6356 * @work:	smb work containing set info request buffer6357 *6358 * Return:	0 on success, otherwise error6359 */6360int smb2_set_info(struct ksmbd_work *work)6361{6362	struct smb2_set_info_req *req;6363	struct smb2_set_info_rsp *rsp;6364	struct ksmbd_file *fp = NULL;6365	int rc = 0;6366	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;6367 6368	ksmbd_debug(SMB, "Received set info request\n");6369 6370	if (work->next_smb2_rcv_hdr_off) {6371		req = ksmbd_req_buf_next(work);6372		rsp = ksmbd_resp_buf_next(work);6373		if (!has_file_id(req->VolatileFileId)) {6374			ksmbd_debug(SMB, "Compound request set FID = %llu\n",6375				    work->compound_fid);6376			id = work->compound_fid;6377			pid = work->compound_pfid;6378		}6379	} else {6380		req = smb2_get_msg(work->request_buf);6381		rsp = smb2_get_msg(work->response_buf);6382	}6383 6384	if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {6385		ksmbd_debug(SMB, "User does not have write permission\n");6386		pr_err("User does not have write permission\n");6387		rc = -EACCES;6388		goto err_out;6389	}6390 6391	if (!has_file_id(id)) {6392		id = req->VolatileFileId;6393		pid = req->PersistentFileId;6394	}6395 6396	fp = ksmbd_lookup_fd_slow(work, id, pid);6397	if (!fp) {6398		ksmbd_debug(SMB, "Invalid id for close: %u\n", id);6399		rc = -ENOENT;6400		goto err_out;6401	}6402 6403	switch (req->InfoType) {6404	case SMB2_O_INFO_FILE:6405		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");6406		rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);6407		break;6408	case SMB2_O_INFO_SECURITY:6409		ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");6410		if (ksmbd_override_fsids(work)) {6411			rc = -ENOMEM;6412			goto err_out;6413		}6414		rc = smb2_set_info_sec(fp,6415				       le32_to_cpu(req->AdditionalInformation),6416				       (char *)req + le16_to_cpu(req->BufferOffset),6417				       le32_to_cpu(req->BufferLength));6418		ksmbd_revert_fsids(work);6419		break;6420	default:6421		rc = -EOPNOTSUPP;6422	}6423 6424	if (rc < 0)6425		goto err_out;6426 6427	rsp->StructureSize = cpu_to_le16(2);6428	rc = ksmbd_iov_pin_rsp(work, (void *)rsp,6429			       sizeof(struct smb2_set_info_rsp));6430	if (rc)6431		goto err_out;6432	ksmbd_fd_put(work, fp);6433	return 0;6434 6435err_out:6436	if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)6437		rsp->hdr.Status = STATUS_ACCESS_DENIED;6438	else if (rc == -EINVAL)6439		rsp->hdr.Status = STATUS_INVALID_PARAMETER;6440	else if (rc == -ESHARE)6441		rsp->hdr.Status = STATUS_SHARING_VIOLATION;6442	else if (rc == -ENOENT)6443		rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;6444	else if (rc == -EBUSY || rc == -ENOTEMPTY)6445		rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;6446	else if (rc == -EAGAIN)6447		rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;6448	else if (rc == -EBADF || rc == -ESTALE)6449		rsp->hdr.Status = STATUS_INVALID_HANDLE;6450	else if (rc == -EEXIST)6451		rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;6452	else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)6453		rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;6454	smb2_set_err_rsp(work);6455	ksmbd_fd_put(work, fp);6456	ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);6457	return rc;6458}6459 6460/**6461 * smb2_read_pipe() - handler for smb2 read from IPC pipe6462 * @work:	smb work containing read IPC pipe command buffer6463 *6464 * Return:	0 on success, otherwise error6465 */6466static noinline int smb2_read_pipe(struct ksmbd_work *work)6467{6468	int nbytes = 0, err;6469	u64 id;6470	struct ksmbd_rpc_command *rpc_resp;6471	struct smb2_read_req *req;6472	struct smb2_read_rsp *rsp;6473 6474	WORK_BUFFERS(work, req, rsp);6475 6476	id = req->VolatileFileId;6477 6478	rpc_resp = ksmbd_rpc_read(work->sess, id);6479	if (rpc_resp) {6480		void *aux_payload_buf;6481 6482		if (rpc_resp->flags != KSMBD_RPC_OK) {6483			err = -EINVAL;6484			goto out;6485		}6486 6487		aux_payload_buf =6488			kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);6489		if (!aux_payload_buf) {6490			err = -ENOMEM;6491			goto out;6492		}6493 6494		memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);6495 6496		nbytes = rpc_resp->payload_sz;6497		err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,6498					     offsetof(struct smb2_read_rsp, Buffer),6499					     aux_payload_buf, nbytes);6500		if (err) {6501			kvfree(aux_payload_buf);6502			goto out;6503		}6504		kvfree(rpc_resp);6505	} else {6506		err = ksmbd_iov_pin_rsp(work, (void *)rsp,6507					offsetof(struct smb2_read_rsp, Buffer));6508		if (err)6509			goto out;6510	}6511 6512	rsp->StructureSize = cpu_to_le16(17);6513	rsp->DataOffset = 80;6514	rsp->Reserved = 0;6515	rsp->DataLength = cpu_to_le32(nbytes);6516	rsp->DataRemaining = 0;6517	rsp->Flags = 0;6518	return 0;6519 6520out:6521	rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;6522	smb2_set_err_rsp(work);6523	kvfree(rpc_resp);6524	return err;6525}6526 6527static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,6528					struct smb2_buffer_desc_v1 *desc,6529					__le32 Channel,6530					__le16 ChannelInfoLength)6531{6532	unsigned int i, ch_count;6533 6534	if (work->conn->dialect == SMB30_PROT_ID &&6535	    Channel != SMB2_CHANNEL_RDMA_V1)6536		return -EINVAL;6537 6538	ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);6539	if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {6540		for (i = 0; i < ch_count; i++) {6541			pr_info("RDMA r/w request %#x: token %#x, length %#x\n",6542				i,6543				le32_to_cpu(desc[i].token),6544				le32_to_cpu(desc[i].length));6545		}6546	}6547	if (!ch_count)6548		return -EINVAL;6549 6550	work->need_invalidate_rkey =6551		(Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);6552	if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)6553		work->remote_key = le32_to_cpu(desc->token);6554	return 0;6555}6556 6557static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,6558				      struct smb2_read_req *req, void *data_buf,6559				      size_t length)6560{6561	int err;6562 6563	err = ksmbd_conn_rdma_write(work->conn, data_buf, length,6564				    (struct smb2_buffer_desc_v1 *)6565				    ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),6566				    le16_to_cpu(req->ReadChannelInfoLength));6567	if (err)6568		return err;6569 6570	return length;6571}6572 6573/**6574 * smb2_read() - handler for smb2 read from file6575 * @work:	smb work containing read command buffer6576 *6577 * Return:	0 on success, otherwise error6578 */6579int smb2_read(struct ksmbd_work *work)6580{6581	struct ksmbd_conn *conn = work->conn;6582	struct smb2_read_req *req;6583	struct smb2_read_rsp *rsp;6584	struct ksmbd_file *fp = NULL;6585	loff_t offset;6586	size_t length, mincount;6587	ssize_t nbytes = 0, remain_bytes = 0;6588	int err = 0;6589	bool is_rdma_channel = false;6590	unsigned int max_read_size = conn->vals->max_read_size;6591	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;6592	void *aux_payload_buf;6593 6594	if (test_share_config_flag(work->tcon->share_conf,6595				   KSMBD_SHARE_FLAG_PIPE)) {6596		ksmbd_debug(SMB, "IPC pipe read request\n");6597		return smb2_read_pipe(work);6598	}6599 6600	if (work->next_smb2_rcv_hdr_off) {6601		req = ksmbd_req_buf_next(work);6602		rsp = ksmbd_resp_buf_next(work);6603		if (!has_file_id(req->VolatileFileId)) {6604			ksmbd_debug(SMB, "Compound request set FID = %llu\n",6605					work->compound_fid);6606			id = work->compound_fid;6607			pid = work->compound_pfid;6608		}6609	} else {6610		req = smb2_get_msg(work->request_buf);6611		rsp = smb2_get_msg(work->response_buf);6612	}6613 6614	if (!has_file_id(id)) {6615		id = req->VolatileFileId;6616		pid = req->PersistentFileId;6617	}6618 6619	if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||6620	    req->Channel == SMB2_CHANNEL_RDMA_V1) {6621		is_rdma_channel = true;6622		max_read_size = get_smbd_max_read_write_size();6623	}6624 6625	if (is_rdma_channel == true) {6626		unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);6627 6628		if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {6629			err = -EINVAL;6630			goto out;6631		}6632		err = smb2_set_remote_key_for_rdma(work,6633						   (struct smb2_buffer_desc_v1 *)6634						   ((char *)req + ch_offset),6635						   req->Channel,6636						   req->ReadChannelInfoLength);6637		if (err)6638			goto out;6639	}6640 6641	fp = ksmbd_lookup_fd_slow(work, id, pid);6642	if (!fp) {6643		err = -ENOENT;6644		goto out;6645	}6646 6647	if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {6648		pr_err("Not permitted to read : 0x%x\n", fp->daccess);6649		err = -EACCES;6650		goto out;6651	}6652 6653	offset = le64_to_cpu(req->Offset);6654	length = le32_to_cpu(req->Length);6655	mincount = le32_to_cpu(req->MinimumCount);6656 6657	if (length > max_read_size) {6658		ksmbd_debug(SMB, "limiting read size to max size(%u)\n",6659			    max_read_size);6660		err = -EINVAL;6661		goto out;6662	}6663 6664	ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",6665		    fp->filp, offset, length);6666 6667	aux_payload_buf = kvzalloc(length, GFP_KERNEL);6668	if (!aux_payload_buf) {6669		err = -ENOMEM;6670		goto out;6671	}6672 6673	nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);6674	if (nbytes < 0) {6675		err = nbytes;6676		goto out;6677	}6678 6679	if ((nbytes == 0 && length != 0) || nbytes < mincount) {6680		kvfree(aux_payload_buf);6681		rsp->hdr.Status = STATUS_END_OF_FILE;6682		smb2_set_err_rsp(work);6683		ksmbd_fd_put(work, fp);6684		return 0;6685	}6686 6687	ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",6688		    nbytes, offset, mincount);6689 6690	if (is_rdma_channel == true) {6691		/* write data to the client using rdma channel */6692		remain_bytes = smb2_read_rdma_channel(work, req,6693						      aux_payload_buf,6694						      nbytes);6695		kvfree(aux_payload_buf);6696		aux_payload_buf = NULL;6697		nbytes = 0;6698		if (remain_bytes < 0) {6699			err = (int)remain_bytes;6700			goto out;6701		}6702	}6703 6704	rsp->StructureSize = cpu_to_le16(17);6705	rsp->DataOffset = 80;6706	rsp->Reserved = 0;6707	rsp->DataLength = cpu_to_le32(nbytes);6708	rsp->DataRemaining = cpu_to_le32(remain_bytes);6709	rsp->Flags = 0;6710	err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,6711				     offsetof(struct smb2_read_rsp, Buffer),6712				     aux_payload_buf, nbytes);6713	if (err) {6714		kvfree(aux_payload_buf);6715		goto out;6716	}6717	ksmbd_fd_put(work, fp);6718	return 0;6719 6720out:6721	if (err) {6722		if (err == -EISDIR)6723			rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;6724		else if (err == -EAGAIN)6725			rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;6726		else if (err == -ENOENT)6727			rsp->hdr.Status = STATUS_FILE_CLOSED;6728		else if (err == -EACCES)6729			rsp->hdr.Status = STATUS_ACCESS_DENIED;6730		else if (err == -ESHARE)6731			rsp->hdr.Status = STATUS_SHARING_VIOLATION;6732		else if (err == -EINVAL)6733			rsp->hdr.Status = STATUS_INVALID_PARAMETER;6734		else6735			rsp->hdr.Status = STATUS_INVALID_HANDLE;6736 6737		smb2_set_err_rsp(work);6738	}6739	ksmbd_fd_put(work, fp);6740	return err;6741}6742 6743/**6744 * smb2_write_pipe() - handler for smb2 write on IPC pipe6745 * @work:	smb work containing write IPC pipe command buffer6746 *6747 * Return:	0 on success, otherwise error6748 */6749static noinline int smb2_write_pipe(struct ksmbd_work *work)6750{6751	struct smb2_write_req *req;6752	struct smb2_write_rsp *rsp;6753	struct ksmbd_rpc_command *rpc_resp;6754	u64 id = 0;6755	int err = 0, ret = 0;6756	char *data_buf;6757	size_t length;6758 6759	WORK_BUFFERS(work, req, rsp);6760 6761	length = le32_to_cpu(req->Length);6762	id = req->VolatileFileId;6763 6764	if ((u64)le16_to_cpu(req->DataOffset) + length >6765	    get_rfc1002_len(work->request_buf)) {6766		pr_err("invalid write data offset %u, smb_len %u\n",6767		       le16_to_cpu(req->DataOffset),6768		       get_rfc1002_len(work->request_buf));6769		err = -EINVAL;6770		goto out;6771	}6772 6773	data_buf = (char *)(((char *)&req->hdr.ProtocolId) +6774			   le16_to_cpu(req->DataOffset));6775 6776	rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);6777	if (rpc_resp) {6778		if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {6779			rsp->hdr.Status = STATUS_NOT_SUPPORTED;6780			kvfree(rpc_resp);6781			smb2_set_err_rsp(work);6782			return -EOPNOTSUPP;6783		}6784		if (rpc_resp->flags != KSMBD_RPC_OK) {6785			rsp->hdr.Status = STATUS_INVALID_HANDLE;6786			smb2_set_err_rsp(work);6787			kvfree(rpc_resp);6788			return ret;6789		}6790		kvfree(rpc_resp);6791	}6792 6793	rsp->StructureSize = cpu_to_le16(17);6794	rsp->DataOffset = 0;6795	rsp->Reserved = 0;6796	rsp->DataLength = cpu_to_le32(length);6797	rsp->DataRemaining = 0;6798	rsp->Reserved2 = 0;6799	err = ksmbd_iov_pin_rsp(work, (void *)rsp,6800				offsetof(struct smb2_write_rsp, Buffer));6801out:6802	if (err) {6803		rsp->hdr.Status = STATUS_INVALID_HANDLE;6804		smb2_set_err_rsp(work);6805	}6806 6807	return err;6808}6809 6810static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,6811				       struct smb2_write_req *req,6812				       struct ksmbd_file *fp,6813				       loff_t offset, size_t length, bool sync)6814{6815	char *data_buf;6816	int ret;6817	ssize_t nbytes;6818 6819	data_buf = kvzalloc(length, GFP_KERNEL);6820	if (!data_buf)6821		return -ENOMEM;6822 6823	ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,6824				   (struct smb2_buffer_desc_v1 *)6825				   ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),6826				   le16_to_cpu(req->WriteChannelInfoLength));6827	if (ret < 0) {6828		kvfree(data_buf);6829		return ret;6830	}6831 6832	ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);6833	kvfree(data_buf);6834	if (ret < 0)6835		return ret;6836 6837	return nbytes;6838}6839 6840/**6841 * smb2_write() - handler for smb2 write from file6842 * @work:	smb work containing write command buffer6843 *6844 * Return:	0 on success, otherwise error6845 */6846int smb2_write(struct ksmbd_work *work)6847{6848	struct smb2_write_req *req;6849	struct smb2_write_rsp *rsp;6850	struct ksmbd_file *fp = NULL;6851	loff_t offset;6852	size_t length;6853	ssize_t nbytes;6854	char *data_buf;6855	bool writethrough = false, is_rdma_channel = false;6856	int err = 0;6857	unsigned int max_write_size = work->conn->vals->max_write_size;6858 6859	WORK_BUFFERS(work, req, rsp);6860 6861	if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {6862		ksmbd_debug(SMB, "IPC pipe write request\n");6863		return smb2_write_pipe(work);6864	}6865 6866	offset = le64_to_cpu(req->Offset);6867	length = le32_to_cpu(req->Length);6868 6869	if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||6870	    req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {6871		is_rdma_channel = true;6872		max_write_size = get_smbd_max_read_write_size();6873		length = le32_to_cpu(req->RemainingBytes);6874	}6875 6876	if (is_rdma_channel == true) {6877		unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);6878 6879		if (req->Length != 0 || req->DataOffset != 0 ||6880		    ch_offset < offsetof(struct smb2_write_req, Buffer)) {6881			err = -EINVAL;6882			goto out;6883		}6884		err = smb2_set_remote_key_for_rdma(work,6885						   (struct smb2_buffer_desc_v1 *)6886						   ((char *)req + ch_offset),6887						   req->Channel,6888						   req->WriteChannelInfoLength);6889		if (err)6890			goto out;6891	}6892 6893	if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {6894		ksmbd_debug(SMB, "User does not have write permission\n");6895		err = -EACCES;6896		goto out;6897	}6898 6899	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);6900	if (!fp) {6901		err = -ENOENT;6902		goto out;6903	}6904 6905	if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {6906		pr_err("Not permitted to write : 0x%x\n", fp->daccess);6907		err = -EACCES;6908		goto out;6909	}6910 6911	if (length > max_write_size) {6912		ksmbd_debug(SMB, "limiting write size to max size(%u)\n",6913			    max_write_size);6914		err = -EINVAL;6915		goto out;6916	}6917 6918	ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));6919	if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)6920		writethrough = true;6921 6922	if (is_rdma_channel == false) {6923		if (le16_to_cpu(req->DataOffset) <6924		    offsetof(struct smb2_write_req, Buffer)) {6925			err = -EINVAL;6926			goto out;6927		}6928 6929		data_buf = (char *)(((char *)&req->hdr.ProtocolId) +6930				    le16_to_cpu(req->DataOffset));6931 6932		ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",6933			    fp->filp, offset, length);6934		err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,6935				      writethrough, &nbytes);6936		if (err < 0)6937			goto out;6938	} else {6939		/* read data from the client using rdma channel, and6940		 * write the data.6941		 */6942		nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,6943						 writethrough);6944		if (nbytes < 0) {6945			err = (int)nbytes;6946			goto out;6947		}6948	}6949 6950	rsp->StructureSize = cpu_to_le16(17);6951	rsp->DataOffset = 0;6952	rsp->Reserved = 0;6953	rsp->DataLength = cpu_to_le32(nbytes);6954	rsp->DataRemaining = 0;6955	rsp->Reserved2 = 0;6956	err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));6957	if (err)6958		goto out;6959	ksmbd_fd_put(work, fp);6960	return 0;6961 6962out:6963	if (err == -EAGAIN)6964		rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;6965	else if (err == -ENOSPC || err == -EFBIG)6966		rsp->hdr.Status = STATUS_DISK_FULL;6967	else if (err == -ENOENT)6968		rsp->hdr.Status = STATUS_FILE_CLOSED;6969	else if (err == -EACCES)6970		rsp->hdr.Status = STATUS_ACCESS_DENIED;6971	else if (err == -ESHARE)6972		rsp->hdr.Status = STATUS_SHARING_VIOLATION;6973	else if (err == -EINVAL)6974		rsp->hdr.Status = STATUS_INVALID_PARAMETER;6975	else6976		rsp->hdr.Status = STATUS_INVALID_HANDLE;6977 6978	smb2_set_err_rsp(work);6979	ksmbd_fd_put(work, fp);6980	return err;6981}6982 6983/**6984 * smb2_flush() - handler for smb2 flush file - fsync6985 * @work:	smb work containing flush command buffer6986 *6987 * Return:	0 on success, otherwise error6988 */6989int smb2_flush(struct ksmbd_work *work)6990{6991	struct smb2_flush_req *req;6992	struct smb2_flush_rsp *rsp;6993	int err;6994 6995	WORK_BUFFERS(work, req, rsp);6996 6997	ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);6998 6999	err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);7000	if (err)7001		goto out;7002 7003	rsp->StructureSize = cpu_to_le16(4);7004	rsp->Reserved = 0;7005	return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));7006 7007out:7008	rsp->hdr.Status = STATUS_INVALID_HANDLE;7009	smb2_set_err_rsp(work);7010	return err;7011}7012 7013/**7014 * smb2_cancel() - handler for smb2 cancel command7015 * @work:	smb work containing cancel command buffer7016 *7017 * Return:	0 on success, otherwise error7018 */7019int smb2_cancel(struct ksmbd_work *work)7020{7021	struct ksmbd_conn *conn = work->conn;7022	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);7023	struct smb2_hdr *chdr;7024	struct ksmbd_work *iter;7025	struct list_head *command_list;7026 7027	if (work->next_smb2_rcv_hdr_off)7028		hdr = ksmbd_resp_buf_next(work);7029 7030	ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",7031		    hdr->MessageId, hdr->Flags);7032 7033	if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {7034		command_list = &conn->async_requests;7035 7036		spin_lock(&conn->request_lock);7037		list_for_each_entry(iter, command_list,7038				    async_request_entry) {7039			chdr = smb2_get_msg(iter->request_buf);7040 7041			if (iter->async_id !=7042			    le64_to_cpu(hdr->Id.AsyncId))7043				continue;7044 7045			ksmbd_debug(SMB,7046				    "smb2 with AsyncId %llu cancelled command = 0x%x\n",7047				    le64_to_cpu(hdr->Id.AsyncId),7048				    le16_to_cpu(chdr->Command));7049			iter->state = KSMBD_WORK_CANCELLED;7050			if (iter->cancel_fn)7051				iter->cancel_fn(iter->cancel_argv);7052			break;7053		}7054		spin_unlock(&conn->request_lock);7055	} else {7056		command_list = &conn->requests;7057 7058		spin_lock(&conn->request_lock);7059		list_for_each_entry(iter, command_list, request_entry) {7060			chdr = smb2_get_msg(iter->request_buf);7061 7062			if (chdr->MessageId != hdr->MessageId ||7063			    iter == work)7064				continue;7065 7066			ksmbd_debug(SMB,7067				    "smb2 with mid %llu cancelled command = 0x%x\n",7068				    le64_to_cpu(hdr->MessageId),7069				    le16_to_cpu(chdr->Command));7070			iter->state = KSMBD_WORK_CANCELLED;7071			break;7072		}7073		spin_unlock(&conn->request_lock);7074	}7075 7076	/* For SMB2_CANCEL command itself send no response*/7077	work->send_no_response = 1;7078	return 0;7079}7080 7081struct file_lock *smb_flock_init(struct file *f)7082{7083	struct file_lock *fl;7084 7085	fl = locks_alloc_lock();7086	if (!fl)7087		goto out;7088 7089	locks_init_lock(fl);7090 7091	fl->c.flc_owner = f;7092	fl->c.flc_pid = current->tgid;7093	fl->c.flc_file = f;7094	fl->c.flc_flags = FL_POSIX;7095	fl->fl_ops = NULL;7096	fl->fl_lmops = NULL;7097 7098out:7099	return fl;7100}7101 7102static int smb2_set_flock_flags(struct file_lock *flock, int flags)7103{7104	int cmd = -EINVAL;7105 7106	/* Checking for wrong flag combination during lock request*/7107	switch (flags) {7108	case SMB2_LOCKFLAG_SHARED:7109		ksmbd_debug(SMB, "received shared request\n");7110		cmd = F_SETLKW;7111		flock->c.flc_type = F_RDLCK;7112		flock->c.flc_flags |= FL_SLEEP;7113		break;7114	case SMB2_LOCKFLAG_EXCLUSIVE:7115		ksmbd_debug(SMB, "received exclusive request\n");7116		cmd = F_SETLKW;7117		flock->c.flc_type = F_WRLCK;7118		flock->c.flc_flags |= FL_SLEEP;7119		break;7120	case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:7121		ksmbd_debug(SMB,7122			    "received shared & fail immediately request\n");7123		cmd = F_SETLK;7124		flock->c.flc_type = F_RDLCK;7125		break;7126	case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:7127		ksmbd_debug(SMB,7128			    "received exclusive & fail immediately request\n");7129		cmd = F_SETLK;7130		flock->c.flc_type = F_WRLCK;7131		break;7132	case SMB2_LOCKFLAG_UNLOCK:7133		ksmbd_debug(SMB, "received unlock request\n");7134		flock->c.flc_type = F_UNLCK;7135		cmd = F_SETLK;7136		break;7137	}7138 7139	return cmd;7140}7141 7142static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,7143					 unsigned int cmd, int flags,7144					 struct list_head *lock_list)7145{7146	struct ksmbd_lock *lock;7147 7148	lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);7149	if (!lock)7150		return NULL;7151 7152	lock->cmd = cmd;7153	lock->fl = flock;7154	lock->start = flock->fl_start;7155	lock->end = flock->fl_end;7156	lock->flags = flags;7157	if (lock->start == lock->end)7158		lock->zero_len = 1;7159	INIT_LIST_HEAD(&lock->clist);7160	INIT_LIST_HEAD(&lock->flist);7161	INIT_LIST_HEAD(&lock->llist);7162	list_add_tail(&lock->llist, lock_list);7163 7164	return lock;7165}7166 7167static void smb2_remove_blocked_lock(void **argv)7168{7169	struct file_lock *flock = (struct file_lock *)argv[0];7170 7171	ksmbd_vfs_posix_lock_unblock(flock);7172	locks_wake_up(flock);7173}7174 7175static inline bool lock_defer_pending(struct file_lock *fl)7176{7177	/* check pending lock waiters */7178	return waitqueue_active(&fl->c.flc_wait);7179}7180 7181/**7182 * smb2_lock() - handler for smb2 file lock command7183 * @work:	smb work containing lock command buffer7184 *7185 * Return:	0 on success, otherwise error7186 */7187int smb2_lock(struct ksmbd_work *work)7188{7189	struct smb2_lock_req *req;7190	struct smb2_lock_rsp *rsp;7191	struct smb2_lock_element *lock_ele;7192	struct ksmbd_file *fp = NULL;7193	struct file_lock *flock = NULL;7194	struct file *filp = NULL;7195	int lock_count;7196	int flags = 0;7197	int cmd = 0;7198	int err = -EIO, i, rc = 0;7199	u64 lock_start, lock_length;7200	struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;7201	struct ksmbd_conn *conn;7202	int nolock = 0;7203	LIST_HEAD(lock_list);7204	LIST_HEAD(rollback_list);7205	int prior_lock = 0;7206 7207	WORK_BUFFERS(work, req, rsp);7208 7209	ksmbd_debug(SMB, "Received lock request\n");7210	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);7211	if (!fp) {7212		ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);7213		err = -ENOENT;7214		goto out2;7215	}7216 7217	filp = fp->filp;7218	lock_count = le16_to_cpu(req->LockCount);7219	lock_ele = req->locks;7220 7221	ksmbd_debug(SMB, "lock count is %d\n", lock_count);7222	if (!lock_count) {7223		err = -EINVAL;7224		goto out2;7225	}7226 7227	for (i = 0; i < lock_count; i++) {7228		flags = le32_to_cpu(lock_ele[i].Flags);7229 7230		flock = smb_flock_init(filp);7231		if (!flock)7232			goto out;7233 7234		cmd = smb2_set_flock_flags(flock, flags);7235 7236		lock_start = le64_to_cpu(lock_ele[i].Offset);7237		lock_length = le64_to_cpu(lock_ele[i].Length);7238		if (lock_start > U64_MAX - lock_length) {7239			pr_err("Invalid lock range requested\n");7240			rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;7241			locks_free_lock(flock);7242			goto out;7243		}7244 7245		if (lock_start > OFFSET_MAX)7246			flock->fl_start = OFFSET_MAX;7247		else7248			flock->fl_start = lock_start;7249 7250		lock_length = le64_to_cpu(lock_ele[i].Length);7251		if (lock_length > OFFSET_MAX - flock->fl_start)7252			lock_length = OFFSET_MAX - flock->fl_start;7253 7254		flock->fl_end = flock->fl_start + lock_length;7255 7256		if (flock->fl_end < flock->fl_start) {7257			ksmbd_debug(SMB,7258				    "the end offset(%llx) is smaller than the start offset(%llx)\n",7259				    flock->fl_end, flock->fl_start);7260			rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;7261			locks_free_lock(flock);7262			goto out;7263		}7264 7265		/* Check conflict locks in one request */7266		list_for_each_entry(cmp_lock, &lock_list, llist) {7267			if (cmp_lock->fl->fl_start <= flock->fl_start &&7268			    cmp_lock->fl->fl_end >= flock->fl_end) {7269				if (cmp_lock->fl->c.flc_type != F_UNLCK &&7270				    flock->c.flc_type != F_UNLCK) {7271					pr_err("conflict two locks in one request\n");7272					err = -EINVAL;7273					locks_free_lock(flock);7274					goto out;7275				}7276			}7277		}7278 7279		smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);7280		if (!smb_lock) {7281			err = -EINVAL;7282			locks_free_lock(flock);7283			goto out;7284		}7285	}7286 7287	list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {7288		if (smb_lock->cmd < 0) {7289			err = -EINVAL;7290			goto out;7291		}7292 7293		if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {7294			err = -EINVAL;7295			goto out;7296		}7297 7298		if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&7299		     smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||7300		    (prior_lock == SMB2_LOCKFLAG_UNLOCK &&7301		     !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {7302			err = -EINVAL;7303			goto out;7304		}7305 7306		prior_lock = smb_lock->flags;7307 7308		if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&7309		    !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))7310			goto no_check_cl;7311 7312		nolock = 1;7313		/* check locks in connection list */7314		down_read(&conn_list_lock);7315		list_for_each_entry(conn, &conn_list, conns_list) {7316			spin_lock(&conn->llist_lock);7317			list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {7318				if (file_inode(cmp_lock->fl->c.flc_file) !=7319				    file_inode(smb_lock->fl->c.flc_file))7320					continue;7321 7322				if (lock_is_unlock(smb_lock->fl)) {7323					if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&7324					    cmp_lock->start == smb_lock->start &&7325					    cmp_lock->end == smb_lock->end &&7326					    !lock_defer_pending(cmp_lock->fl)) {7327						nolock = 0;7328						list_del(&cmp_lock->flist);7329						list_del(&cmp_lock->clist);7330						spin_unlock(&conn->llist_lock);7331						up_read(&conn_list_lock);7332 7333						locks_free_lock(cmp_lock->fl);7334						kfree(cmp_lock);7335						goto out_check_cl;7336					}7337					continue;7338				}7339 7340				if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {7341					if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)7342						continue;7343				} else {7344					if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)7345						continue;7346				}7347 7348				/* check zero byte lock range */7349				if (cmp_lock->zero_len && !smb_lock->zero_len &&7350				    cmp_lock->start > smb_lock->start &&7351				    cmp_lock->start < smb_lock->end) {7352					spin_unlock(&conn->llist_lock);7353					up_read(&conn_list_lock);7354					pr_err("previous lock conflict with zero byte lock range\n");7355					goto out;7356				}7357 7358				if (smb_lock->zero_len && !cmp_lock->zero_len &&7359				    smb_lock->start > cmp_lock->start &&7360				    smb_lock->start < cmp_lock->end) {7361					spin_unlock(&conn->llist_lock);7362					up_read(&conn_list_lock);7363					pr_err("current lock conflict with zero byte lock range\n");7364					goto out;7365				}7366 7367				if (((cmp_lock->start <= smb_lock->start &&7368				      cmp_lock->end > smb_lock->start) ||7369				     (cmp_lock->start < smb_lock->end &&7370				      cmp_lock->end >= smb_lock->end)) &&7371				    !cmp_lock->zero_len && !smb_lock->zero_len) {7372					spin_unlock(&conn->llist_lock);7373					up_read(&conn_list_lock);7374					pr_err("Not allow lock operation on exclusive lock range\n");7375					goto out;7376				}7377			}7378			spin_unlock(&conn->llist_lock);7379		}7380		up_read(&conn_list_lock);7381out_check_cl:7382		if (lock_is_unlock(smb_lock->fl) && nolock) {7383			pr_err("Try to unlock nolocked range\n");7384			rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;7385			goto out;7386		}7387 7388no_check_cl:7389		if (smb_lock->zero_len) {7390			err = 0;7391			goto skip;7392		}7393 7394		flock = smb_lock->fl;7395		list_del(&smb_lock->llist);7396retry:7397		rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);7398skip:7399		if (flags & SMB2_LOCKFLAG_UNLOCK) {7400			if (!rc) {7401				ksmbd_debug(SMB, "File unlocked\n");7402			} else if (rc == -ENOENT) {7403				rsp->hdr.Status = STATUS_NOT_LOCKED;7404				goto out;7405			}7406			locks_free_lock(flock);7407			kfree(smb_lock);7408		} else {7409			if (rc == FILE_LOCK_DEFERRED) {7410				void **argv;7411 7412				ksmbd_debug(SMB,7413					    "would have to wait for getting lock\n");7414				list_add(&smb_lock->llist, &rollback_list);7415 7416				argv = kmalloc(sizeof(void *), GFP_KERNEL);7417				if (!argv) {7418					err = -ENOMEM;7419					goto out;7420				}7421				argv[0] = flock;7422 7423				rc = setup_async_work(work,7424						      smb2_remove_blocked_lock,7425						      argv);7426				if (rc) {7427					kfree(argv);7428					err = -ENOMEM;7429					goto out;7430				}7431				spin_lock(&fp->f_lock);7432				list_add(&work->fp_entry, &fp->blocked_works);7433				spin_unlock(&fp->f_lock);7434 7435				smb2_send_interim_resp(work, STATUS_PENDING);7436 7437				ksmbd_vfs_posix_lock_wait(flock);7438 7439				spin_lock(&fp->f_lock);7440				list_del(&work->fp_entry);7441				spin_unlock(&fp->f_lock);7442 7443				if (work->state != KSMBD_WORK_ACTIVE) {7444					list_del(&smb_lock->llist);7445					locks_free_lock(flock);7446 7447					if (work->state == KSMBD_WORK_CANCELLED) {7448						rsp->hdr.Status =7449							STATUS_CANCELLED;7450						kfree(smb_lock);7451						smb2_send_interim_resp(work,7452								       STATUS_CANCELLED);7453						work->send_no_response = 1;7454						goto out;7455					}7456 7457					rsp->hdr.Status =7458						STATUS_RANGE_NOT_LOCKED;7459					kfree(smb_lock);7460					goto out2;7461				}7462 7463				list_del(&smb_lock->llist);7464				release_async_work(work);7465				goto retry;7466			} else if (!rc) {7467				list_add(&smb_lock->llist, &rollback_list);7468				spin_lock(&work->conn->llist_lock);7469				list_add_tail(&smb_lock->clist,7470					      &work->conn->lock_list);7471				list_add_tail(&smb_lock->flist,7472					      &fp->lock_list);7473				spin_unlock(&work->conn->llist_lock);7474				ksmbd_debug(SMB, "successful in taking lock\n");7475			} else {7476				goto out;7477			}7478		}7479	}7480 7481	if (atomic_read(&fp->f_ci->op_count) > 1)7482		smb_break_all_oplock(work, fp);7483 7484	rsp->StructureSize = cpu_to_le16(4);7485	ksmbd_debug(SMB, "successful in taking lock\n");7486	rsp->hdr.Status = STATUS_SUCCESS;7487	rsp->Reserved = 0;7488	err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));7489	if (err)7490		goto out;7491 7492	ksmbd_fd_put(work, fp);7493	return 0;7494 7495out:7496	list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {7497		locks_free_lock(smb_lock->fl);7498		list_del(&smb_lock->llist);7499		kfree(smb_lock);7500	}7501 7502	list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {7503		struct file_lock *rlock = NULL;7504 7505		rlock = smb_flock_init(filp);7506		rlock->c.flc_type = F_UNLCK;7507		rlock->fl_start = smb_lock->start;7508		rlock->fl_end = smb_lock->end;7509 7510		rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);7511		if (rc)7512			pr_err("rollback unlock fail : %d\n", rc);7513 7514		list_del(&smb_lock->llist);7515		spin_lock(&work->conn->llist_lock);7516		if (!list_empty(&smb_lock->flist))7517			list_del(&smb_lock->flist);7518		list_del(&smb_lock->clist);7519		spin_unlock(&work->conn->llist_lock);7520 7521		locks_free_lock(smb_lock->fl);7522		locks_free_lock(rlock);7523		kfree(smb_lock);7524	}7525out2:7526	ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);7527 7528	if (!rsp->hdr.Status) {7529		if (err == -EINVAL)7530			rsp->hdr.Status = STATUS_INVALID_PARAMETER;7531		else if (err == -ENOMEM)7532			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;7533		else if (err == -ENOENT)7534			rsp->hdr.Status = STATUS_FILE_CLOSED;7535		else7536			rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;7537	}7538 7539	smb2_set_err_rsp(work);7540	ksmbd_fd_put(work, fp);7541	return err;7542}7543 7544static int fsctl_copychunk(struct ksmbd_work *work,7545			   struct copychunk_ioctl_req *ci_req,7546			   unsigned int cnt_code,7547			   unsigned int input_count,7548			   unsigned long long volatile_id,7549			   unsigned long long persistent_id,7550			   struct smb2_ioctl_rsp *rsp)7551{7552	struct copychunk_ioctl_rsp *ci_rsp;7553	struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;7554	struct srv_copychunk *chunks;7555	unsigned int i, chunk_count, chunk_count_written = 0;7556	unsigned int chunk_size_written = 0;7557	loff_t total_size_written = 0;7558	int ret = 0;7559 7560	ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];7561 7562	rsp->VolatileFileId = volatile_id;7563	rsp->PersistentFileId = persistent_id;7564	ci_rsp->ChunksWritten =7565		cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());7566	ci_rsp->ChunkBytesWritten =7567		cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());7568	ci_rsp->TotalBytesWritten =7569		cpu_to_le32(ksmbd_server_side_copy_max_total_size());7570 7571	chunk_count = le32_to_cpu(ci_req->ChunkCount);7572	if (chunk_count == 0)7573		goto out;7574	total_size_written = 0;7575 7576	/* verify the SRV_COPYCHUNK_COPY packet */7577	if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||7578	    input_count < struct_size(ci_req, Chunks, chunk_count)) {7579		rsp->hdr.Status = STATUS_INVALID_PARAMETER;7580		return -EINVAL;7581	}7582 7583	chunks = &ci_req->Chunks[0];7584	for (i = 0; i < chunk_count; i++) {7585		if (le32_to_cpu(chunks[i].Length) == 0 ||7586		    le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())7587			break;7588		total_size_written += le32_to_cpu(chunks[i].Length);7589	}7590 7591	if (i < chunk_count ||7592	    total_size_written > ksmbd_server_side_copy_max_total_size()) {7593		rsp->hdr.Status = STATUS_INVALID_PARAMETER;7594		return -EINVAL;7595	}7596 7597	src_fp = ksmbd_lookup_foreign_fd(work,7598					 le64_to_cpu(ci_req->ResumeKey[0]));7599	dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);7600	ret = -EINVAL;7601	if (!src_fp ||7602	    src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {7603		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;7604		goto out;7605	}7606 7607	if (!dst_fp) {7608		rsp->hdr.Status = STATUS_FILE_CLOSED;7609		goto out;7610	}7611 7612	/*7613	 * FILE_READ_DATA should only be included in7614	 * the FSCTL_COPYCHUNK case7615	 */7616	if (cnt_code == FSCTL_COPYCHUNK &&7617	    !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {7618		rsp->hdr.Status = STATUS_ACCESS_DENIED;7619		goto out;7620	}7621 7622	ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,7623					 chunks, chunk_count,7624					 &chunk_count_written,7625					 &chunk_size_written,7626					 &total_size_written);7627	if (ret < 0) {7628		if (ret == -EACCES)7629			rsp->hdr.Status = STATUS_ACCESS_DENIED;7630		if (ret == -EAGAIN)7631			rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;7632		else if (ret == -EBADF)7633			rsp->hdr.Status = STATUS_INVALID_HANDLE;7634		else if (ret == -EFBIG || ret == -ENOSPC)7635			rsp->hdr.Status = STATUS_DISK_FULL;7636		else if (ret == -EINVAL)7637			rsp->hdr.Status = STATUS_INVALID_PARAMETER;7638		else if (ret == -EISDIR)7639			rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;7640		else if (ret == -E2BIG)7641			rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;7642		else7643			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;7644	}7645 7646	ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);7647	ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);7648	ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);7649out:7650	ksmbd_fd_put(work, src_fp);7651	ksmbd_fd_put(work, dst_fp);7652	return ret;7653}7654 7655static __be32 idev_ipv4_address(struct in_device *idev)7656{7657	__be32 addr = 0;7658 7659	struct in_ifaddr *ifa;7660 7661	rcu_read_lock();7662	in_dev_for_each_ifa_rcu(ifa, idev) {7663		if (ifa->ifa_flags & IFA_F_SECONDARY)7664			continue;7665 7666		addr = ifa->ifa_address;7667		break;7668	}7669	rcu_read_unlock();7670	return addr;7671}7672 7673static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,7674					struct smb2_ioctl_rsp *rsp,7675					unsigned int out_buf_len)7676{7677	struct network_interface_info_ioctl_rsp *nii_rsp = NULL;7678	int nbytes = 0;7679	struct net_device *netdev;7680	struct sockaddr_storage_rsp *sockaddr_storage;7681	unsigned int flags;7682	unsigned long long speed;7683 7684	rtnl_lock();7685	for_each_netdev(&init_net, netdev) {7686		bool ipv4_set = false;7687 7688		if (netdev->type == ARPHRD_LOOPBACK)7689			continue;7690 7691		flags = dev_get_flags(netdev);7692		if (!(flags & IFF_RUNNING))7693			continue;7694ipv6_retry:7695		if (out_buf_len <7696		    nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {7697			rtnl_unlock();7698			return -ENOSPC;7699		}7700 7701		nii_rsp = (struct network_interface_info_ioctl_rsp *)7702				&rsp->Buffer[nbytes];7703		nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);7704 7705		nii_rsp->Capability = 0;7706		if (netdev->real_num_tx_queues > 1)7707			nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);7708		if (ksmbd_rdma_capable_netdev(netdev))7709			nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);7710 7711		nii_rsp->Next = cpu_to_le32(152);7712		nii_rsp->Reserved = 0;7713 7714		if (netdev->ethtool_ops->get_link_ksettings) {7715			struct ethtool_link_ksettings cmd;7716 7717			netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);7718			speed = cmd.base.speed;7719		} else {7720			ksmbd_debug(SMB, "%s %s\n", netdev->name,7721				    "speed is unknown, defaulting to 1Gb/sec");7722			speed = SPEED_1000;7723		}7724 7725		speed *= 1000000;7726		nii_rsp->LinkSpeed = cpu_to_le64(speed);7727 7728		sockaddr_storage = (struct sockaddr_storage_rsp *)7729					nii_rsp->SockAddr_Storage;7730		memset(sockaddr_storage, 0, 128);7731 7732		if (!ipv4_set) {7733			struct in_device *idev;7734 7735			sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);7736			sockaddr_storage->addr4.Port = 0;7737 7738			idev = __in_dev_get_rtnl(netdev);7739			if (!idev)7740				continue;7741			sockaddr_storage->addr4.IPv4address =7742						idev_ipv4_address(idev);7743			nbytes += sizeof(struct network_interface_info_ioctl_rsp);7744			ipv4_set = true;7745			goto ipv6_retry;7746		} else {7747			struct inet6_dev *idev6;7748			struct inet6_ifaddr *ifa;7749			__u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;7750 7751			sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);7752			sockaddr_storage->addr6.Port = 0;7753			sockaddr_storage->addr6.FlowInfo = 0;7754 7755			idev6 = __in6_dev_get(netdev);7756			if (!idev6)7757				continue;7758 7759			list_for_each_entry(ifa, &idev6->addr_list, if_list) {7760				if (ifa->flags & (IFA_F_TENTATIVE |7761							IFA_F_DEPRECATED))7762					continue;7763				memcpy(ipv6_addr, ifa->addr.s6_addr, 16);7764				break;7765			}7766			sockaddr_storage->addr6.ScopeId = 0;7767			nbytes += sizeof(struct network_interface_info_ioctl_rsp);7768		}7769	}7770	rtnl_unlock();7771 7772	/* zero if this is last one */7773	if (nii_rsp)7774		nii_rsp->Next = 0;7775 7776	rsp->PersistentFileId = SMB2_NO_FID;7777	rsp->VolatileFileId = SMB2_NO_FID;7778	return nbytes;7779}7780 7781static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,7782					 struct validate_negotiate_info_req *neg_req,7783					 struct validate_negotiate_info_rsp *neg_rsp,7784					 unsigned int in_buf_len)7785{7786	int ret = 0;7787	int dialect;7788 7789	if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +7790			le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))7791		return -EINVAL;7792 7793	dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,7794					     neg_req->DialectCount);7795	if (dialect == BAD_PROT_ID || dialect != conn->dialect) {7796		ret = -EINVAL;7797		goto err_out;7798	}7799 7800	if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {7801		ret = -EINVAL;7802		goto err_out;7803	}7804 7805	if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {7806		ret = -EINVAL;7807		goto err_out;7808	}7809 7810	if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {7811		ret = -EINVAL;7812		goto err_out;7813	}7814 7815	neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);7816	memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);7817	neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);7818	neg_rsp->Dialect = cpu_to_le16(conn->dialect);7819err_out:7820	return ret;7821}7822 7823static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,7824					struct file_allocated_range_buffer *qar_req,7825					struct file_allocated_range_buffer *qar_rsp,7826					unsigned int in_count, unsigned int *out_count)7827{7828	struct ksmbd_file *fp;7829	loff_t start, length;7830	int ret = 0;7831 7832	*out_count = 0;7833	if (in_count == 0)7834		return -EINVAL;7835 7836	start = le64_to_cpu(qar_req->file_offset);7837	length = le64_to_cpu(qar_req->length);7838 7839	if (start < 0 || length < 0)7840		return -EINVAL;7841 7842	fp = ksmbd_lookup_fd_fast(work, id);7843	if (!fp)7844		return -ENOENT;7845 7846	ret = ksmbd_vfs_fqar_lseek(fp, start, length,7847				   qar_rsp, in_count, out_count);7848	if (ret && ret != -E2BIG)7849		*out_count = 0;7850 7851	ksmbd_fd_put(work, fp);7852	return ret;7853}7854 7855static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,7856				 unsigned int out_buf_len,7857				 struct smb2_ioctl_req *req,7858				 struct smb2_ioctl_rsp *rsp)7859{7860	struct ksmbd_rpc_command *rpc_resp;7861	char *data_buf = (char *)req + le32_to_cpu(req->InputOffset);7862	int nbytes = 0;7863 7864	rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,7865				   le32_to_cpu(req->InputCount));7866	if (rpc_resp) {7867		if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {7868			/*7869			 * set STATUS_SOME_NOT_MAPPED response7870			 * for unknown domain sid.7871			 */7872			rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;7873		} else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {7874			rsp->hdr.Status = STATUS_NOT_SUPPORTED;7875			goto out;7876		} else if (rpc_resp->flags != KSMBD_RPC_OK) {7877			rsp->hdr.Status = STATUS_INVALID_PARAMETER;7878			goto out;7879		}7880 7881		nbytes = rpc_resp->payload_sz;7882		if (rpc_resp->payload_sz > out_buf_len) {7883			rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;7884			nbytes = out_buf_len;7885		}7886 7887		if (!rpc_resp->payload_sz) {7888			rsp->hdr.Status =7889				STATUS_UNEXPECTED_IO_ERROR;7890			goto out;7891		}7892 7893		memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);7894	}7895out:7896	kvfree(rpc_resp);7897	return nbytes;7898}7899 7900static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,7901				   struct file_sparse *sparse)7902{7903	struct ksmbd_file *fp;7904	struct mnt_idmap *idmap;7905	int ret = 0;7906	__le32 old_fattr;7907 7908	fp = ksmbd_lookup_fd_fast(work, id);7909	if (!fp)7910		return -ENOENT;7911	idmap = file_mnt_idmap(fp->filp);7912 7913	old_fattr = fp->f_ci->m_fattr;7914	if (sparse->SetSparse)7915		fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;7916	else7917		fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;7918 7919	if (fp->f_ci->m_fattr != old_fattr &&7920	    test_share_config_flag(work->tcon->share_conf,7921				   KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {7922		struct xattr_dos_attrib da;7923 7924		ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,7925						     fp->filp->f_path.dentry, &da);7926		if (ret <= 0)7927			goto out;7928 7929		da.attr = le32_to_cpu(fp->f_ci->m_fattr);7930		ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,7931						     &fp->filp->f_path,7932						     &da, true);7933		if (ret)7934			fp->f_ci->m_fattr = old_fattr;7935	}7936 7937out:7938	ksmbd_fd_put(work, fp);7939	return ret;7940}7941 7942static int fsctl_request_resume_key(struct ksmbd_work *work,7943				    struct smb2_ioctl_req *req,7944				    struct resume_key_ioctl_rsp *key_rsp)7945{7946	struct ksmbd_file *fp;7947 7948	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);7949	if (!fp)7950		return -ENOENT;7951 7952	memset(key_rsp, 0, sizeof(*key_rsp));7953	key_rsp->ResumeKey[0] = req->VolatileFileId;7954	key_rsp->ResumeKey[1] = req->PersistentFileId;7955	ksmbd_fd_put(work, fp);7956 7957	return 0;7958}7959 7960/**7961 * smb2_ioctl() - handler for smb2 ioctl command7962 * @work:	smb work containing ioctl command buffer7963 *7964 * Return:	0 on success, otherwise error7965 */7966int smb2_ioctl(struct ksmbd_work *work)7967{7968	struct smb2_ioctl_req *req;7969	struct smb2_ioctl_rsp *rsp;7970	unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;7971	u64 id = KSMBD_NO_FID;7972	struct ksmbd_conn *conn = work->conn;7973	int ret = 0;7974	char *buffer;7975 7976	if (work->next_smb2_rcv_hdr_off) {7977		req = ksmbd_req_buf_next(work);7978		rsp = ksmbd_resp_buf_next(work);7979		if (!has_file_id(req->VolatileFileId)) {7980			ksmbd_debug(SMB, "Compound request set FID = %llu\n",7981				    work->compound_fid);7982			id = work->compound_fid;7983		}7984	} else {7985		req = smb2_get_msg(work->request_buf);7986		rsp = smb2_get_msg(work->response_buf);7987	}7988 7989	if (!has_file_id(id))7990		id = req->VolatileFileId;7991 7992	if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {7993		rsp->hdr.Status = STATUS_NOT_SUPPORTED;7994		goto out;7995	}7996 7997	buffer = (char *)req + le32_to_cpu(req->InputOffset);7998 7999	cnt_code = le32_to_cpu(req->CtlCode);8000	ret = smb2_calc_max_out_buf_len(work, 48,8001					le32_to_cpu(req->MaxOutputResponse));8002	if (ret < 0) {8003		rsp->hdr.Status = STATUS_INVALID_PARAMETER;8004		goto out;8005	}8006	out_buf_len = (unsigned int)ret;8007	in_buf_len = le32_to_cpu(req->InputCount);8008 8009	switch (cnt_code) {8010	case FSCTL_DFS_GET_REFERRALS:8011	case FSCTL_DFS_GET_REFERRALS_EX:8012		/* Not support DFS yet */8013		rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;8014		goto out;8015	case FSCTL_CREATE_OR_GET_OBJECT_ID:8016	{8017		struct file_object_buf_type1_ioctl_rsp *obj_buf;8018 8019		nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);8020		obj_buf = (struct file_object_buf_type1_ioctl_rsp *)8021			&rsp->Buffer[0];8022 8023		/*8024		 * TODO: This is dummy implementation to pass smbtorture8025		 * Need to check correct response later8026		 */8027		memset(obj_buf->ObjectId, 0x0, 16);8028		memset(obj_buf->BirthVolumeId, 0x0, 16);8029		memset(obj_buf->BirthObjectId, 0x0, 16);8030		memset(obj_buf->DomainId, 0x0, 16);8031 8032		break;8033	}8034	case FSCTL_PIPE_TRANSCEIVE:8035		out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);8036		nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);8037		break;8038	case FSCTL_VALIDATE_NEGOTIATE_INFO:8039		if (conn->dialect < SMB30_PROT_ID) {8040			ret = -EOPNOTSUPP;8041			goto out;8042		}8043 8044		if (in_buf_len < offsetof(struct validate_negotiate_info_req,8045					  Dialects)) {8046			ret = -EINVAL;8047			goto out;8048		}8049 8050		if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {8051			ret = -EINVAL;8052			goto out;8053		}8054 8055		ret = fsctl_validate_negotiate_info(conn,8056			(struct validate_negotiate_info_req *)buffer,8057			(struct validate_negotiate_info_rsp *)&rsp->Buffer[0],8058			in_buf_len);8059		if (ret < 0)8060			goto out;8061 8062		nbytes = sizeof(struct validate_negotiate_info_rsp);8063		rsp->PersistentFileId = SMB2_NO_FID;8064		rsp->VolatileFileId = SMB2_NO_FID;8065		break;8066	case FSCTL_QUERY_NETWORK_INTERFACE_INFO:8067		ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);8068		if (ret < 0)8069			goto out;8070		nbytes = ret;8071		break;8072	case FSCTL_REQUEST_RESUME_KEY:8073		if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {8074			ret = -EINVAL;8075			goto out;8076		}8077 8078		ret = fsctl_request_resume_key(work, req,8079					       (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);8080		if (ret < 0)8081			goto out;8082		rsp->PersistentFileId = req->PersistentFileId;8083		rsp->VolatileFileId = req->VolatileFileId;8084		nbytes = sizeof(struct resume_key_ioctl_rsp);8085		break;8086	case FSCTL_COPYCHUNK:8087	case FSCTL_COPYCHUNK_WRITE:8088		if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {8089			ksmbd_debug(SMB,8090				    "User does not have write permission\n");8091			ret = -EACCES;8092			goto out;8093		}8094 8095		if (in_buf_len <= sizeof(struct copychunk_ioctl_req)) {8096			ret = -EINVAL;8097			goto out;8098		}8099 8100		if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {8101			ret = -EINVAL;8102			goto out;8103		}8104 8105		nbytes = sizeof(struct copychunk_ioctl_rsp);8106		rsp->VolatileFileId = req->VolatileFileId;8107		rsp->PersistentFileId = req->PersistentFileId;8108		fsctl_copychunk(work,8109				(struct copychunk_ioctl_req *)buffer,8110				le32_to_cpu(req->CtlCode),8111				le32_to_cpu(req->InputCount),8112				req->VolatileFileId,8113				req->PersistentFileId,8114				rsp);8115		break;8116	case FSCTL_SET_SPARSE:8117		if (in_buf_len < sizeof(struct file_sparse)) {8118			ret = -EINVAL;8119			goto out;8120		}8121 8122		ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer);8123		if (ret < 0)8124			goto out;8125		break;8126	case FSCTL_SET_ZERO_DATA:8127	{8128		struct file_zero_data_information *zero_data;8129		struct ksmbd_file *fp;8130		loff_t off, len, bfz;8131 8132		if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {8133			ksmbd_debug(SMB,8134				    "User does not have write permission\n");8135			ret = -EACCES;8136			goto out;8137		}8138 8139		if (in_buf_len < sizeof(struct file_zero_data_information)) {8140			ret = -EINVAL;8141			goto out;8142		}8143 8144		zero_data =8145			(struct file_zero_data_information *)buffer;8146 8147		off = le64_to_cpu(zero_data->FileOffset);8148		bfz = le64_to_cpu(zero_data->BeyondFinalZero);8149		if (off < 0 || bfz < 0 || off > bfz) {8150			ret = -EINVAL;8151			goto out;8152		}8153 8154		len = bfz - off;8155		if (len) {8156			fp = ksmbd_lookup_fd_fast(work, id);8157			if (!fp) {8158				ret = -ENOENT;8159				goto out;8160			}8161 8162			ret = ksmbd_vfs_zero_data(work, fp, off, len);8163			ksmbd_fd_put(work, fp);8164			if (ret < 0)8165				goto out;8166		}8167		break;8168	}8169	case FSCTL_QUERY_ALLOCATED_RANGES:8170		if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {8171			ret = -EINVAL;8172			goto out;8173		}8174 8175		ret = fsctl_query_allocated_ranges(work, id,8176			(struct file_allocated_range_buffer *)buffer,8177			(struct file_allocated_range_buffer *)&rsp->Buffer[0],8178			out_buf_len /8179			sizeof(struct file_allocated_range_buffer), &nbytes);8180		if (ret == -E2BIG) {8181			rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;8182		} else if (ret < 0) {8183			nbytes = 0;8184			goto out;8185		}8186 8187		nbytes *= sizeof(struct file_allocated_range_buffer);8188		break;8189	case FSCTL_GET_REPARSE_POINT:8190	{8191		struct reparse_data_buffer *reparse_ptr;8192		struct ksmbd_file *fp;8193 8194		reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];8195		fp = ksmbd_lookup_fd_fast(work, id);8196		if (!fp) {8197			pr_err("not found fp!!\n");8198			ret = -ENOENT;8199			goto out;8200		}8201 8202		reparse_ptr->ReparseTag =8203			smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);8204		reparse_ptr->ReparseDataLength = 0;8205		ksmbd_fd_put(work, fp);8206		nbytes = sizeof(struct reparse_data_buffer);8207		break;8208	}8209	case FSCTL_DUPLICATE_EXTENTS_TO_FILE:8210	{8211		struct ksmbd_file *fp_in, *fp_out = NULL;8212		struct duplicate_extents_to_file *dup_ext;8213		loff_t src_off, dst_off, length, cloned;8214 8215		if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {8216			ret = -EINVAL;8217			goto out;8218		}8219 8220		dup_ext = (struct duplicate_extents_to_file *)buffer;8221 8222		fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,8223					     dup_ext->PersistentFileHandle);8224		if (!fp_in) {8225			pr_err("not found file handle in duplicate extent to file\n");8226			ret = -ENOENT;8227			goto out;8228		}8229 8230		fp_out = ksmbd_lookup_fd_fast(work, id);8231		if (!fp_out) {8232			pr_err("not found fp\n");8233			ret = -ENOENT;8234			goto dup_ext_out;8235		}8236 8237		src_off = le64_to_cpu(dup_ext->SourceFileOffset);8238		dst_off = le64_to_cpu(dup_ext->TargetFileOffset);8239		length = le64_to_cpu(dup_ext->ByteCount);8240		/*8241		 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE8242		 * should fall back to vfs_copy_file_range().  This could be8243		 * beneficial when re-exporting nfs/smb mount, but note that8244		 * this can result in partial copy that returns an error status.8245		 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,8246		 * fall back to vfs_copy_file_range(), should be avoided when8247		 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.8248		 */8249		cloned = vfs_clone_file_range(fp_in->filp, src_off,8250					      fp_out->filp, dst_off, length, 0);8251		if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {8252			ret = -EOPNOTSUPP;8253			goto dup_ext_out;8254		} else if (cloned != length) {8255			cloned = vfs_copy_file_range(fp_in->filp, src_off,8256						     fp_out->filp, dst_off,8257						     length, 0);8258			if (cloned != length) {8259				if (cloned < 0)8260					ret = cloned;8261				else8262					ret = -EINVAL;8263			}8264		}8265 8266dup_ext_out:8267		ksmbd_fd_put(work, fp_in);8268		ksmbd_fd_put(work, fp_out);8269		if (ret < 0)8270			goto out;8271		break;8272	}8273	default:8274		ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",8275			    cnt_code);8276		ret = -EOPNOTSUPP;8277		goto out;8278	}8279 8280	rsp->CtlCode = cpu_to_le32(cnt_code);8281	rsp->InputCount = cpu_to_le32(0);8282	rsp->InputOffset = cpu_to_le32(112);8283	rsp->OutputOffset = cpu_to_le32(112);8284	rsp->OutputCount = cpu_to_le32(nbytes);8285	rsp->StructureSize = cpu_to_le16(49);8286	rsp->Reserved = cpu_to_le16(0);8287	rsp->Flags = cpu_to_le32(0);8288	rsp->Reserved2 = cpu_to_le32(0);8289	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);8290	if (!ret)8291		return ret;8292 8293out:8294	if (ret == -EACCES)8295		rsp->hdr.Status = STATUS_ACCESS_DENIED;8296	else if (ret == -ENOENT)8297		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;8298	else if (ret == -EOPNOTSUPP)8299		rsp->hdr.Status = STATUS_NOT_SUPPORTED;8300	else if (ret == -ENOSPC)8301		rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;8302	else if (ret < 0 || rsp->hdr.Status == 0)8303		rsp->hdr.Status = STATUS_INVALID_PARAMETER;8304	smb2_set_err_rsp(work);8305	return 0;8306}8307 8308/**8309 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command8310 * @work:	smb work containing oplock break command buffer8311 *8312 * Return:	08313 */8314static void smb20_oplock_break_ack(struct ksmbd_work *work)8315{8316	struct smb2_oplock_break *req;8317	struct smb2_oplock_break *rsp;8318	struct ksmbd_file *fp;8319	struct oplock_info *opinfo = NULL;8320	__le32 err = 0;8321	int ret = 0;8322	u64 volatile_id, persistent_id;8323	char req_oplevel = 0, rsp_oplevel = 0;8324	unsigned int oplock_change_type;8325 8326	WORK_BUFFERS(work, req, rsp);8327 8328	volatile_id = req->VolatileFid;8329	persistent_id = req->PersistentFid;8330	req_oplevel = req->OplockLevel;8331	ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",8332		    volatile_id, persistent_id, req_oplevel);8333 8334	fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);8335	if (!fp) {8336		rsp->hdr.Status = STATUS_FILE_CLOSED;8337		smb2_set_err_rsp(work);8338		return;8339	}8340 8341	opinfo = opinfo_get(fp);8342	if (!opinfo) {8343		pr_err("unexpected null oplock_info\n");8344		rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;8345		smb2_set_err_rsp(work);8346		ksmbd_fd_put(work, fp);8347		return;8348	}8349 8350	if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {8351		rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;8352		goto err_out;8353	}8354 8355	if (opinfo->op_state == OPLOCK_STATE_NONE) {8356		ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);8357		rsp->hdr.Status = STATUS_UNSUCCESSFUL;8358		goto err_out;8359	}8360 8361	if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||8362	     opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&8363	    (req_oplevel != SMB2_OPLOCK_LEVEL_II &&8364	     req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {8365		err = STATUS_INVALID_OPLOCK_PROTOCOL;8366		oplock_change_type = OPLOCK_WRITE_TO_NONE;8367	} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&8368		   req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {8369		err = STATUS_INVALID_OPLOCK_PROTOCOL;8370		oplock_change_type = OPLOCK_READ_TO_NONE;8371	} else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||8372		   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {8373		err = STATUS_INVALID_DEVICE_STATE;8374		if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||8375		     opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&8376		    req_oplevel == SMB2_OPLOCK_LEVEL_II) {8377			oplock_change_type = OPLOCK_WRITE_TO_READ;8378		} else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||8379			    opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&8380			   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {8381			oplock_change_type = OPLOCK_WRITE_TO_NONE;8382		} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&8383			   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {8384			oplock_change_type = OPLOCK_READ_TO_NONE;8385		} else {8386			oplock_change_type = 0;8387		}8388	} else {8389		oplock_change_type = 0;8390	}8391 8392	switch (oplock_change_type) {8393	case OPLOCK_WRITE_TO_READ:8394		ret = opinfo_write_to_read(opinfo);8395		rsp_oplevel = SMB2_OPLOCK_LEVEL_II;8396		break;8397	case OPLOCK_WRITE_TO_NONE:8398		ret = opinfo_write_to_none(opinfo);8399		rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;8400		break;8401	case OPLOCK_READ_TO_NONE:8402		ret = opinfo_read_to_none(opinfo);8403		rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;8404		break;8405	default:8406		pr_err("unknown oplock change 0x%x -> 0x%x\n",8407		       opinfo->level, rsp_oplevel);8408	}8409 8410	if (ret < 0) {8411		rsp->hdr.Status = err;8412		goto err_out;8413	}8414 8415	opinfo->op_state = OPLOCK_STATE_NONE;8416	wake_up_interruptible_all(&opinfo->oplock_q);8417	opinfo_put(opinfo);8418	ksmbd_fd_put(work, fp);8419 8420	rsp->StructureSize = cpu_to_le16(24);8421	rsp->OplockLevel = rsp_oplevel;8422	rsp->Reserved = 0;8423	rsp->Reserved2 = 0;8424	rsp->VolatileFid = volatile_id;8425	rsp->PersistentFid = persistent_id;8426	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));8427	if (!ret)8428		return;8429 8430err_out:8431	opinfo->op_state = OPLOCK_STATE_NONE;8432	wake_up_interruptible_all(&opinfo->oplock_q);8433 8434	opinfo_put(opinfo);8435	ksmbd_fd_put(work, fp);8436	smb2_set_err_rsp(work);8437}8438 8439static int check_lease_state(struct lease *lease, __le32 req_state)8440{8441	if ((lease->new_state ==8442	     (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&8443	    !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {8444		lease->new_state = req_state;8445		return 0;8446	}8447 8448	if (lease->new_state == req_state)8449		return 0;8450 8451	return 1;8452}8453 8454/**8455 * smb21_lease_break_ack() - handler for smb2.1 lease break command8456 * @work:	smb work containing lease break command buffer8457 *8458 * Return:	08459 */8460static void smb21_lease_break_ack(struct ksmbd_work *work)8461{8462	struct ksmbd_conn *conn = work->conn;8463	struct smb2_lease_ack *req;8464	struct smb2_lease_ack *rsp;8465	struct oplock_info *opinfo;8466	__le32 err = 0;8467	int ret = 0;8468	unsigned int lease_change_type;8469	__le32 lease_state;8470	struct lease *lease;8471 8472	WORK_BUFFERS(work, req, rsp);8473 8474	ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",8475		    le32_to_cpu(req->LeaseState));8476	opinfo = lookup_lease_in_table(conn, req->LeaseKey);8477	if (!opinfo) {8478		ksmbd_debug(OPLOCK, "file not opened\n");8479		smb2_set_err_rsp(work);8480		rsp->hdr.Status = STATUS_UNSUCCESSFUL;8481		return;8482	}8483	lease = opinfo->o_lease;8484 8485	if (opinfo->op_state == OPLOCK_STATE_NONE) {8486		pr_err("unexpected lease break state 0x%x\n",8487		       opinfo->op_state);8488		rsp->hdr.Status = STATUS_UNSUCCESSFUL;8489		goto err_out;8490	}8491 8492	if (check_lease_state(lease, req->LeaseState)) {8493		rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;8494		ksmbd_debug(OPLOCK,8495			    "req lease state: 0x%x, expected state: 0x%x\n",8496			    req->LeaseState, lease->new_state);8497		goto err_out;8498	}8499 8500	if (!atomic_read(&opinfo->breaking_cnt)) {8501		rsp->hdr.Status = STATUS_UNSUCCESSFUL;8502		goto err_out;8503	}8504 8505	/* check for bad lease state */8506	if (req->LeaseState &8507	    (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {8508		err = STATUS_INVALID_OPLOCK_PROTOCOL;8509		if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)8510			lease_change_type = OPLOCK_WRITE_TO_NONE;8511		else8512			lease_change_type = OPLOCK_READ_TO_NONE;8513		ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",8514			    le32_to_cpu(lease->state),8515			    le32_to_cpu(req->LeaseState));8516	} else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&8517		   req->LeaseState != SMB2_LEASE_NONE_LE) {8518		err = STATUS_INVALID_OPLOCK_PROTOCOL;8519		lease_change_type = OPLOCK_READ_TO_NONE;8520		ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",8521			    le32_to_cpu(lease->state),8522			    le32_to_cpu(req->LeaseState));8523	} else {8524		/* valid lease state changes */8525		err = STATUS_INVALID_DEVICE_STATE;8526		if (req->LeaseState == SMB2_LEASE_NONE_LE) {8527			if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)8528				lease_change_type = OPLOCK_WRITE_TO_NONE;8529			else8530				lease_change_type = OPLOCK_READ_TO_NONE;8531		} else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {8532			if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)8533				lease_change_type = OPLOCK_WRITE_TO_READ;8534			else8535				lease_change_type = OPLOCK_READ_HANDLE_TO_READ;8536		} else {8537			lease_change_type = 0;8538		}8539	}8540 8541	switch (lease_change_type) {8542	case OPLOCK_WRITE_TO_READ:8543		ret = opinfo_write_to_read(opinfo);8544		break;8545	case OPLOCK_READ_HANDLE_TO_READ:8546		ret = opinfo_read_handle_to_read(opinfo);8547		break;8548	case OPLOCK_WRITE_TO_NONE:8549		ret = opinfo_write_to_none(opinfo);8550		break;8551	case OPLOCK_READ_TO_NONE:8552		ret = opinfo_read_to_none(opinfo);8553		break;8554	default:8555		ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",8556			    le32_to_cpu(lease->state),8557			    le32_to_cpu(req->LeaseState));8558	}8559 8560	if (ret < 0) {8561		rsp->hdr.Status = err;8562		goto err_out;8563	}8564 8565	lease_state = lease->state;8566	opinfo->op_state = OPLOCK_STATE_NONE;8567	wake_up_interruptible_all(&opinfo->oplock_q);8568	atomic_dec(&opinfo->breaking_cnt);8569	wake_up_interruptible_all(&opinfo->oplock_brk);8570	opinfo_put(opinfo);8571 8572	rsp->StructureSize = cpu_to_le16(36);8573	rsp->Reserved = 0;8574	rsp->Flags = 0;8575	memcpy(rsp->LeaseKey, req->LeaseKey, 16);8576	rsp->LeaseState = lease_state;8577	rsp->LeaseDuration = 0;8578	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));8579	if (!ret)8580		return;8581 8582err_out:8583	wake_up_interruptible_all(&opinfo->oplock_q);8584	atomic_dec(&opinfo->breaking_cnt);8585	wake_up_interruptible_all(&opinfo->oplock_brk);8586 8587	opinfo_put(opinfo);8588	smb2_set_err_rsp(work);8589}8590 8591/**8592 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break8593 * @work:	smb work containing oplock/lease break command buffer8594 *8595 * Return:	08596 */8597int smb2_oplock_break(struct ksmbd_work *work)8598{8599	struct smb2_oplock_break *req;8600	struct smb2_oplock_break *rsp;8601 8602	WORK_BUFFERS(work, req, rsp);8603 8604	switch (le16_to_cpu(req->StructureSize)) {8605	case OP_BREAK_STRUCT_SIZE_20:8606		smb20_oplock_break_ack(work);8607		break;8608	case OP_BREAK_STRUCT_SIZE_21:8609		smb21_lease_break_ack(work);8610		break;8611	default:8612		ksmbd_debug(OPLOCK, "invalid break cmd %d\n",8613			    le16_to_cpu(req->StructureSize));8614		rsp->hdr.Status = STATUS_INVALID_PARAMETER;8615		smb2_set_err_rsp(work);8616	}8617 8618	return 0;8619}8620 8621/**8622 * smb2_notify() - handler for smb2 notify request8623 * @work:   smb work containing notify command buffer8624 *8625 * Return:      08626 */8627int smb2_notify(struct ksmbd_work *work)8628{8629	struct smb2_change_notify_req *req;8630	struct smb2_change_notify_rsp *rsp;8631 8632	WORK_BUFFERS(work, req, rsp);8633 8634	if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {8635		rsp->hdr.Status = STATUS_INTERNAL_ERROR;8636		smb2_set_err_rsp(work);8637		return 0;8638	}8639 8640	smb2_set_err_rsp(work);8641	rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;8642	return 0;8643}8644 8645/**8646 * smb2_is_sign_req() - handler for checking packet signing status8647 * @work:	smb work containing notify command buffer8648 * @command:	SMB2 command id8649 *8650 * Return:	true if packed is signed, false otherwise8651 */8652bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)8653{8654	struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);8655 8656	if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&8657	    command != SMB2_NEGOTIATE_HE &&8658	    command != SMB2_SESSION_SETUP_HE &&8659	    command != SMB2_OPLOCK_BREAK_HE)8660		return true;8661 8662	return false;8663}8664 8665/**8666 * smb2_check_sign_req() - handler for req packet sign processing8667 * @work:   smb work containing notify command buffer8668 *8669 * Return:	1 on success, 0 otherwise8670 */8671int smb2_check_sign_req(struct ksmbd_work *work)8672{8673	struct smb2_hdr *hdr;8674	char signature_req[SMB2_SIGNATURE_SIZE];8675	char signature[SMB2_HMACSHA256_SIZE];8676	struct kvec iov[1];8677	size_t len;8678 8679	hdr = smb2_get_msg(work->request_buf);8680	if (work->next_smb2_rcv_hdr_off)8681		hdr = ksmbd_req_buf_next(work);8682 8683	if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)8684		len = get_rfc1002_len(work->request_buf);8685	else if (hdr->NextCommand)8686		len = le32_to_cpu(hdr->NextCommand);8687	else8688		len = get_rfc1002_len(work->request_buf) -8689			work->next_smb2_rcv_hdr_off;8690 8691	memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);8692	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);8693 8694	iov[0].iov_base = (char *)&hdr->ProtocolId;8695	iov[0].iov_len = len;8696 8697	if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,8698				signature))8699		return 0;8700 8701	if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {8702		pr_err("bad smb2 signature\n");8703		return 0;8704	}8705 8706	return 1;8707}8708 8709/**8710 * smb2_set_sign_rsp() - handler for rsp packet sign processing8711 * @work:   smb work containing notify command buffer8712 *8713 */8714void smb2_set_sign_rsp(struct ksmbd_work *work)8715{8716	struct smb2_hdr *hdr;8717	char signature[SMB2_HMACSHA256_SIZE];8718	struct kvec *iov;8719	int n_vec = 1;8720 8721	hdr = ksmbd_resp_buf_curr(work);8722	hdr->Flags |= SMB2_FLAGS_SIGNED;8723	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);8724 8725	if (hdr->Command == SMB2_READ) {8726		iov = &work->iov[work->iov_idx - 1];8727		n_vec++;8728	} else {8729		iov = &work->iov[work->iov_idx];8730	}8731 8732	if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,8733				 signature))8734		memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);8735}8736 8737/**8738 * smb3_check_sign_req() - handler for req packet sign processing8739 * @work:   smb work containing notify command buffer8740 *8741 * Return:	1 on success, 0 otherwise8742 */8743int smb3_check_sign_req(struct ksmbd_work *work)8744{8745	struct ksmbd_conn *conn = work->conn;8746	char *signing_key;8747	struct smb2_hdr *hdr;8748	struct channel *chann;8749	char signature_req[SMB2_SIGNATURE_SIZE];8750	char signature[SMB2_CMACAES_SIZE];8751	struct kvec iov[1];8752	size_t len;8753 8754	hdr = smb2_get_msg(work->request_buf);8755	if (work->next_smb2_rcv_hdr_off)8756		hdr = ksmbd_req_buf_next(work);8757 8758	if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)8759		len = get_rfc1002_len(work->request_buf);8760	else if (hdr->NextCommand)8761		len = le32_to_cpu(hdr->NextCommand);8762	else8763		len = get_rfc1002_len(work->request_buf) -8764			work->next_smb2_rcv_hdr_off;8765 8766	if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {8767		signing_key = work->sess->smb3signingkey;8768	} else {8769		chann = lookup_chann_list(work->sess, conn);8770		if (!chann) {8771			return 0;8772		}8773		signing_key = chann->smb3signingkey;8774	}8775 8776	if (!signing_key) {8777		pr_err("SMB3 signing key is not generated\n");8778		return 0;8779	}8780 8781	memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);8782	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);8783	iov[0].iov_base = (char *)&hdr->ProtocolId;8784	iov[0].iov_len = len;8785 8786	if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))8787		return 0;8788 8789	if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {8790		pr_err("bad smb2 signature\n");8791		return 0;8792	}8793 8794	return 1;8795}8796 8797/**8798 * smb3_set_sign_rsp() - handler for rsp packet sign processing8799 * @work:   smb work containing notify command buffer8800 *8801 */8802void smb3_set_sign_rsp(struct ksmbd_work *work)8803{8804	struct ksmbd_conn *conn = work->conn;8805	struct smb2_hdr *hdr;8806	struct channel *chann;8807	char signature[SMB2_CMACAES_SIZE];8808	struct kvec *iov;8809	int n_vec = 1;8810	char *signing_key;8811 8812	hdr = ksmbd_resp_buf_curr(work);8813 8814	if (conn->binding == false &&8815	    le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {8816		signing_key = work->sess->smb3signingkey;8817	} else {8818		chann = lookup_chann_list(work->sess, work->conn);8819		if (!chann) {8820			return;8821		}8822		signing_key = chann->smb3signingkey;8823	}8824 8825	if (!signing_key)8826		return;8827 8828	hdr->Flags |= SMB2_FLAGS_SIGNED;8829	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);8830 8831	if (hdr->Command == SMB2_READ) {8832		iov = &work->iov[work->iov_idx - 1];8833		n_vec++;8834	} else {8835		iov = &work->iov[work->iov_idx];8836	}8837 8838	if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,8839				 signature))8840		memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);8841}8842 8843/**8844 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response8845 * @work:   smb work containing response buffer8846 *8847 */8848void smb3_preauth_hash_rsp(struct ksmbd_work *work)8849{8850	struct ksmbd_conn *conn = work->conn;8851	struct ksmbd_session *sess = work->sess;8852	struct smb2_hdr *req, *rsp;8853 8854	if (conn->dialect != SMB311_PROT_ID)8855		return;8856 8857	WORK_BUFFERS(work, req, rsp);8858 8859	if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&8860	    conn->preauth_info)8861		ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,8862						 conn->preauth_info->Preauth_HashValue);8863 8864	if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {8865		__u8 *hash_value;8866 8867		if (conn->binding) {8868			struct preauth_session *preauth_sess;8869 8870			preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);8871			if (!preauth_sess)8872				return;8873			hash_value = preauth_sess->Preauth_HashValue;8874		} else {8875			hash_value = sess->Preauth_HashValue;8876			if (!hash_value)8877				return;8878		}8879		ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,8880						 hash_value);8881	}8882}8883 8884static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)8885{8886	struct smb2_transform_hdr *tr_hdr = tr_buf + 4;8887	struct smb2_hdr *hdr = smb2_get_msg(old_buf);8888	unsigned int orig_len = get_rfc1002_len(old_buf);8889 8890	/* tr_buf must be cleared by the caller */8891	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;8892	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);8893	tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);8894	if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||8895	    cipher_type == SMB2_ENCRYPTION_AES256_GCM)8896		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);8897	else8898		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);8899	memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);8900	inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));8901	inc_rfc1001_len(tr_buf, orig_len);8902}8903 8904int smb3_encrypt_resp(struct ksmbd_work *work)8905{8906	struct kvec *iov = work->iov;8907	int rc = -ENOMEM;8908	void *tr_buf;8909 8910	tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);8911	if (!tr_buf)8912		return rc;8913 8914	/* fill transform header */8915	fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);8916 8917	iov[0].iov_base = tr_buf;8918	iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;8919	work->tr_buf = tr_buf;8920 8921	return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);8922}8923 8924bool smb3_is_transform_hdr(void *buf)8925{8926	struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);8927 8928	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;8929}8930 8931int smb3_decrypt_req(struct ksmbd_work *work)8932{8933	struct ksmbd_session *sess;8934	char *buf = work->request_buf;8935	unsigned int pdu_length = get_rfc1002_len(buf);8936	struct kvec iov[2];8937	int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);8938	struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);8939	int rc = 0;8940 8941	if (pdu_length < sizeof(struct smb2_transform_hdr) ||8942	    buf_data_size < sizeof(struct smb2_hdr)) {8943		pr_err("Transform message is too small (%u)\n",8944		       pdu_length);8945		return -ECONNABORTED;8946	}8947 8948	if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {8949		pr_err("Transform message is broken\n");8950		return -ECONNABORTED;8951	}8952 8953	sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));8954	if (!sess) {8955		pr_err("invalid session id(%llx) in transform header\n",8956		       le64_to_cpu(tr_hdr->SessionId));8957		return -ECONNABORTED;8958	}8959 8960	iov[0].iov_base = buf;8961	iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;8962	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;8963	iov[1].iov_len = buf_data_size;8964	rc = ksmbd_crypt_message(work, iov, 2, 0);8965	if (rc)8966		return rc;8967 8968	memmove(buf + 4, iov[1].iov_base, buf_data_size);8969	*(__be32 *)buf = cpu_to_be32(buf_data_size);8970 8971	return rc;8972}8973 8974bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)8975{8976	struct ksmbd_conn *conn = work->conn;8977	struct ksmbd_session *sess = work->sess;8978	struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);8979 8980	if (conn->dialect < SMB30_PROT_ID)8981		return false;8982 8983	if (work->next_smb2_rcv_hdr_off)8984		rsp = ksmbd_resp_buf_next(work);8985 8986	if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&8987	    sess->user && !user_guest(sess->user) &&8988	    rsp->Status == STATUS_SUCCESS)8989		return true;8990	return false;8991}8992