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1// SPDX-License-Identifier: GPL-2.02/*3 * SMB2 version specific operations4 *5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>6 */7 8#include <linux/pagemap.h>9#include <linux/vfs.h>10#include <linux/falloc.h>11#include <linux/scatterlist.h>12#include <linux/uuid.h>13#include <linux/sort.h>14#include <crypto/aead.h>15#include <linux/fiemap.h>16#include <linux/folio_queue.h>17#include <uapi/linux/magic.h>18#include "cifsfs.h"19#include "cifsglob.h"20#include "smb2pdu.h"21#include "smb2proto.h"22#include "cifsproto.h"23#include "cifs_debug.h"24#include "cifs_unicode.h"25#include "../common/smb2status.h"26#include "smb2glob.h"27#include "cifs_ioctl.h"28#include "smbdirect.h"29#include "fscache.h"30#include "fs_context.h"31#include "cached_dir.h"32#include "reparse.h"33 34/* Change credits for different ops and return the total number of credits */35static int36change_conf(struct TCP_Server_Info *server)37{38 server->credits += server->echo_credits + server->oplock_credits;39 if (server->credits > server->max_credits)40 server->credits = server->max_credits;41 server->oplock_credits = server->echo_credits = 0;42 switch (server->credits) {43 case 0:44 return 0;45 case 1:46 server->echoes = false;47 server->oplocks = false;48 break;49 case 2:50 server->echoes = true;51 server->oplocks = false;52 server->echo_credits = 1;53 break;54 default:55 server->echoes = true;56 if (enable_oplocks) {57 server->oplocks = true;58 server->oplock_credits = 1;59 } else60 server->oplocks = false;61 62 server->echo_credits = 1;63 }64 server->credits -= server->echo_credits + server->oplock_credits;65 return server->credits + server->echo_credits + server->oplock_credits;66}67 68static void69smb2_add_credits(struct TCP_Server_Info *server,70 struct cifs_credits *credits, const int optype)71{72 int *val, rc = -1;73 int scredits, in_flight;74 unsigned int add = credits->value;75 unsigned int instance = credits->instance;76 bool reconnect_detected = false;77 bool reconnect_with_invalid_credits = false;78 79 spin_lock(&server->req_lock);80 val = server->ops->get_credits_field(server, optype);81 82 /* eg found case where write overlapping reconnect messed up credits */83 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))84 reconnect_with_invalid_credits = true;85 86 if ((instance == 0) || (instance == server->reconnect_instance))87 *val += add;88 else89 reconnect_detected = true;90 91 if (*val > 65000) {92 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */93 pr_warn_once("server overflowed SMB3 credits\n");94 trace_smb3_overflow_credits(server->CurrentMid,95 server->conn_id, server->hostname, *val,96 add, server->in_flight);97 }98 if (credits->in_flight_check > 1) {99 pr_warn_once("rreq R=%08x[%x] Credits not in flight\n",100 credits->rreq_debug_id, credits->rreq_debug_index);101 } else {102 credits->in_flight_check = 2;103 }104 if (WARN_ON_ONCE(server->in_flight == 0)) {105 pr_warn_once("rreq R=%08x[%x] Zero in_flight\n",106 credits->rreq_debug_id, credits->rreq_debug_index);107 trace_smb3_rw_credits(credits->rreq_debug_id,108 credits->rreq_debug_index,109 credits->value,110 server->credits, server->in_flight, 0,111 cifs_trace_rw_credits_zero_in_flight);112 }113 server->in_flight--;114 if (server->in_flight == 0 &&115 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&116 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))117 rc = change_conf(server);118 /*119 * Sometimes server returns 0 credits on oplock break ack - we need to120 * rebalance credits in this case.121 */122 else if (server->in_flight > 0 && server->oplock_credits == 0 &&123 server->oplocks) {124 if (server->credits > 1) {125 server->credits--;126 server->oplock_credits++;127 }128 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&129 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))130 /* if now have too many oplock credits, rebalance so don't starve normal ops */131 change_conf(server);132 133 scredits = *val;134 in_flight = server->in_flight;135 spin_unlock(&server->req_lock);136 wake_up(&server->request_q);137 138 if (reconnect_detected) {139 trace_smb3_reconnect_detected(server->CurrentMid,140 server->conn_id, server->hostname, scredits, add, in_flight);141 142 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",143 add, instance);144 }145 146 if (reconnect_with_invalid_credits) {147 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,148 server->conn_id, server->hostname, scredits, add, in_flight);149 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",150 optype, scredits, add);151 }152 153 spin_lock(&server->srv_lock);154 if (server->tcpStatus == CifsNeedReconnect155 || server->tcpStatus == CifsExiting) {156 spin_unlock(&server->srv_lock);157 return;158 }159 spin_unlock(&server->srv_lock);160 161 switch (rc) {162 case -1:163 /* change_conf hasn't been executed */164 break;165 case 0:166 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");167 break;168 case 1:169 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");170 break;171 case 2:172 cifs_dbg(FYI, "disabling oplocks\n");173 break;174 default:175 /* change_conf rebalanced credits for different types */176 break;177 }178 179 trace_smb3_add_credits(server->CurrentMid,180 server->conn_id, server->hostname, scredits, add, in_flight);181 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);182}183 184static void185smb2_set_credits(struct TCP_Server_Info *server, const int val)186{187 int scredits, in_flight;188 189 spin_lock(&server->req_lock);190 server->credits = val;191 if (val == 1) {192 server->reconnect_instance++;193 /*194 * ChannelSequence updated for all channels in primary channel so that consistent195 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1196 */197 if (SERVER_IS_CHAN(server))198 server->primary_server->channel_sequence_num++;199 else200 server->channel_sequence_num++;201 }202 scredits = server->credits;203 in_flight = server->in_flight;204 spin_unlock(&server->req_lock);205 206 trace_smb3_set_credits(server->CurrentMid,207 server->conn_id, server->hostname, scredits, val, in_flight);208 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);209 210 /* don't log while holding the lock */211 if (val == 1)212 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");213}214 215static int *216smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)217{218 switch (optype) {219 case CIFS_ECHO_OP:220 return &server->echo_credits;221 case CIFS_OBREAK_OP:222 return &server->oplock_credits;223 default:224 return &server->credits;225 }226}227 228static unsigned int229smb2_get_credits(struct mid_q_entry *mid)230{231 return mid->credits_received;232}233 234static int235smb2_wait_mtu_credits(struct TCP_Server_Info *server, size_t size,236 size_t *num, struct cifs_credits *credits)237{238 int rc = 0;239 unsigned int scredits, in_flight;240 241 spin_lock(&server->req_lock);242 while (1) {243 spin_unlock(&server->req_lock);244 245 spin_lock(&server->srv_lock);246 if (server->tcpStatus == CifsExiting) {247 spin_unlock(&server->srv_lock);248 return -ENOENT;249 }250 spin_unlock(&server->srv_lock);251 252 spin_lock(&server->req_lock);253 if (server->credits <= 0) {254 spin_unlock(&server->req_lock);255 cifs_num_waiters_inc(server);256 rc = wait_event_killable(server->request_q,257 has_credits(server, &server->credits, 1));258 cifs_num_waiters_dec(server);259 if (rc)260 return rc;261 spin_lock(&server->req_lock);262 } else {263 scredits = server->credits;264 /* can deadlock with reopen */265 if (scredits <= 8) {266 *num = SMB2_MAX_BUFFER_SIZE;267 credits->value = 0;268 credits->instance = 0;269 break;270 }271 272 /* leave some credits for reopen and other ops */273 scredits -= 8;274 *num = min_t(unsigned int, size,275 scredits * SMB2_MAX_BUFFER_SIZE);276 277 credits->value =278 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);279 credits->instance = server->reconnect_instance;280 server->credits -= credits->value;281 server->in_flight++;282 if (server->in_flight > server->max_in_flight)283 server->max_in_flight = server->in_flight;284 break;285 }286 }287 scredits = server->credits;288 in_flight = server->in_flight;289 spin_unlock(&server->req_lock);290 291 trace_smb3_wait_credits(server->CurrentMid,292 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);293 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",294 __func__, credits->value, scredits);295 296 return rc;297}298 299static int300smb2_adjust_credits(struct TCP_Server_Info *server,301 struct cifs_io_subrequest *subreq,302 unsigned int /*enum smb3_rw_credits_trace*/ trace)303{304 struct cifs_credits *credits = &subreq->credits;305 int new_val = DIV_ROUND_UP(subreq->subreq.len - subreq->subreq.transferred,306 SMB2_MAX_BUFFER_SIZE);307 int scredits, in_flight;308 309 if (!credits->value || credits->value == new_val)310 return 0;311 312 if (credits->value < new_val) {313 trace_smb3_rw_credits(subreq->rreq->debug_id,314 subreq->subreq.debug_index,315 credits->value,316 server->credits, server->in_flight,317 new_val - credits->value,318 cifs_trace_rw_credits_no_adjust_up);319 trace_smb3_too_many_credits(server->CurrentMid,320 server->conn_id, server->hostname, 0, credits->value - new_val, 0);321 cifs_server_dbg(VFS, "R=%x[%x] request has less credits (%d) than required (%d)",322 subreq->rreq->debug_id, subreq->subreq.debug_index,323 credits->value, new_val);324 325 return -EOPNOTSUPP;326 }327 328 spin_lock(&server->req_lock);329 330 if (server->reconnect_instance != credits->instance) {331 scredits = server->credits;332 in_flight = server->in_flight;333 spin_unlock(&server->req_lock);334 335 trace_smb3_rw_credits(subreq->rreq->debug_id,336 subreq->subreq.debug_index,337 credits->value,338 server->credits, server->in_flight,339 new_val - credits->value,340 cifs_trace_rw_credits_old_session);341 trace_smb3_reconnect_detected(server->CurrentMid,342 server->conn_id, server->hostname, scredits,343 credits->value - new_val, in_flight);344 cifs_server_dbg(VFS, "R=%x[%x] trying to return %d credits to old session\n",345 subreq->rreq->debug_id, subreq->subreq.debug_index,346 credits->value - new_val);347 return -EAGAIN;348 }349 350 trace_smb3_rw_credits(subreq->rreq->debug_id,351 subreq->subreq.debug_index,352 credits->value,353 server->credits, server->in_flight,354 new_val - credits->value, trace);355 server->credits += credits->value - new_val;356 scredits = server->credits;357 in_flight = server->in_flight;358 spin_unlock(&server->req_lock);359 wake_up(&server->request_q);360 361 trace_smb3_adj_credits(server->CurrentMid,362 server->conn_id, server->hostname, scredits,363 credits->value - new_val, in_flight);364 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",365 __func__, credits->value - new_val, scredits);366 367 credits->value = new_val;368 369 return 0;370}371 372static __u64373smb2_get_next_mid(struct TCP_Server_Info *server)374{375 __u64 mid;376 /* for SMB2 we need the current value */377 spin_lock(&server->mid_lock);378 mid = server->CurrentMid++;379 spin_unlock(&server->mid_lock);380 return mid;381}382 383static void384smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)385{386 spin_lock(&server->mid_lock);387 if (server->CurrentMid >= val)388 server->CurrentMid -= val;389 spin_unlock(&server->mid_lock);390}391 392static struct mid_q_entry *393__smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)394{395 struct mid_q_entry *mid;396 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;397 __u64 wire_mid = le64_to_cpu(shdr->MessageId);398 399 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {400 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");401 return NULL;402 }403 404 spin_lock(&server->mid_lock);405 list_for_each_entry(mid, &server->pending_mid_q, qhead) {406 if ((mid->mid == wire_mid) &&407 (mid->mid_state == MID_REQUEST_SUBMITTED) &&408 (mid->command == shdr->Command)) {409 kref_get(&mid->refcount);410 if (dequeue) {411 list_del_init(&mid->qhead);412 mid->mid_flags |= MID_DELETED;413 }414 spin_unlock(&server->mid_lock);415 return mid;416 }417 }418 spin_unlock(&server->mid_lock);419 return NULL;420}421 422static struct mid_q_entry *423smb2_find_mid(struct TCP_Server_Info *server, char *buf)424{425 return __smb2_find_mid(server, buf, false);426}427 428static struct mid_q_entry *429smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)430{431 return __smb2_find_mid(server, buf, true);432}433 434static void435smb2_dump_detail(void *buf, struct TCP_Server_Info *server)436{437#ifdef CONFIG_CIFS_DEBUG2438 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;439 440 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",441 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,442 shdr->Id.SyncId.ProcessId);443 if (!server->ops->check_message(buf, server->total_read, server)) {444 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,445 server->ops->calc_smb_size(buf));446 }447#endif448}449 450static bool451smb2_need_neg(struct TCP_Server_Info *server)452{453 return server->max_read == 0;454}455 456static int457smb2_negotiate(const unsigned int xid,458 struct cifs_ses *ses,459 struct TCP_Server_Info *server)460{461 int rc;462 463 spin_lock(&server->mid_lock);464 server->CurrentMid = 0;465 spin_unlock(&server->mid_lock);466 rc = SMB2_negotiate(xid, ses, server);467 /* BB we probably don't need to retry with modern servers */468 if (rc == -EAGAIN)469 rc = -EHOSTDOWN;470 return rc;471}472 473static unsigned int474smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)475{476 struct TCP_Server_Info *server = tcon->ses->server;477 unsigned int wsize;478 479 /* start with specified wsize, or default */480 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;481 wsize = min_t(unsigned int, wsize, server->max_write);482 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))483 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);484 485 return wsize;486}487 488static unsigned int489smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)490{491 struct TCP_Server_Info *server = tcon->ses->server;492 unsigned int wsize;493 494 /* start with specified wsize, or default */495 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;496 wsize = min_t(unsigned int, wsize, server->max_write);497#ifdef CONFIG_CIFS_SMB_DIRECT498 if (server->rdma) {499 if (server->sign)500 /*501 * Account for SMB2 data transfer packet header and502 * possible encryption header503 */504 wsize = min_t(unsigned int,505 wsize,506 server->smbd_conn->max_fragmented_send_size -507 SMB2_READWRITE_PDU_HEADER_SIZE -508 sizeof(struct smb2_transform_hdr));509 else510 wsize = min_t(unsigned int,511 wsize, server->smbd_conn->max_readwrite_size);512 }513#endif514 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))515 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);516 517 return wsize;518}519 520static unsigned int521smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)522{523 struct TCP_Server_Info *server = tcon->ses->server;524 unsigned int rsize;525 526 /* start with specified rsize, or default */527 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;528 rsize = min_t(unsigned int, rsize, server->max_read);529 530 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))531 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);532 533 return rsize;534}535 536static unsigned int537smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)538{539 struct TCP_Server_Info *server = tcon->ses->server;540 unsigned int rsize;541 542 /* start with specified rsize, or default */543 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;544 rsize = min_t(unsigned int, rsize, server->max_read);545#ifdef CONFIG_CIFS_SMB_DIRECT546 if (server->rdma) {547 if (server->sign)548 /*549 * Account for SMB2 data transfer packet header and550 * possible encryption header551 */552 rsize = min_t(unsigned int,553 rsize,554 server->smbd_conn->max_fragmented_recv_size -555 SMB2_READWRITE_PDU_HEADER_SIZE -556 sizeof(struct smb2_transform_hdr));557 else558 rsize = min_t(unsigned int,559 rsize, server->smbd_conn->max_readwrite_size);560 }561#endif562 563 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))564 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);565 566 return rsize;567}568 569/*570 * compare two interfaces a and b571 * return 0 if everything matches.572 * return 1 if a is rdma capable, or rss capable, or has higher link speed573 * return -1 otherwise.574 */575static int576iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)577{578 int cmp_ret = 0;579 580 WARN_ON(!a || !b);581 if (a->rdma_capable == b->rdma_capable) {582 if (a->rss_capable == b->rss_capable) {583 if (a->speed == b->speed) {584 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,585 (struct sockaddr *) &b->sockaddr);586 if (!cmp_ret)587 return 0;588 else if (cmp_ret > 0)589 return 1;590 else591 return -1;592 } else if (a->speed > b->speed)593 return 1;594 else595 return -1;596 } else if (a->rss_capable > b->rss_capable)597 return 1;598 else599 return -1;600 } else if (a->rdma_capable > b->rdma_capable)601 return 1;602 else603 return -1;604}605 606static int607parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,608 size_t buf_len, struct cifs_ses *ses, bool in_mount)609{610 struct network_interface_info_ioctl_rsp *p;611 struct sockaddr_in *addr4;612 struct sockaddr_in6 *addr6;613 struct iface_info_ipv4 *p4;614 struct iface_info_ipv6 *p6;615 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;616 struct cifs_server_iface tmp_iface;617 ssize_t bytes_left;618 size_t next = 0;619 int nb_iface = 0;620 int rc = 0, ret = 0;621 622 bytes_left = buf_len;623 p = buf;624 625 spin_lock(&ses->iface_lock);626 /* do not query too frequently, this time with lock held */627 if (ses->iface_last_update &&628 time_before(jiffies, ses->iface_last_update +629 (SMB_INTERFACE_POLL_INTERVAL * HZ))) {630 spin_unlock(&ses->iface_lock);631 return 0;632 }633 634 /*635 * Go through iface_list and mark them as inactive636 */637 list_for_each_entry_safe(iface, niface, &ses->iface_list,638 iface_head)639 iface->is_active = 0;640 641 spin_unlock(&ses->iface_lock);642 643 /*644 * Samba server e.g. can return an empty interface list in some cases,645 * which would only be a problem if we were requesting multichannel646 */647 if (bytes_left == 0) {648 /* avoid spamming logs every 10 minutes, so log only in mount */649 if ((ses->chan_max > 1) && in_mount)650 cifs_dbg(VFS,651 "multichannel not available\n"652 "Empty network interface list returned by server %s\n",653 ses->server->hostname);654 rc = -EOPNOTSUPP;655 ses->iface_last_update = jiffies;656 goto out;657 }658 659 while (bytes_left >= (ssize_t)sizeof(*p)) {660 memset(&tmp_iface, 0, sizeof(tmp_iface));661 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);662 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;663 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;664 665 switch (p->Family) {666 /*667 * The kernel and wire socket structures have the same668 * layout and use network byte order but make the669 * conversion explicit in case either one changes.670 */671 case INTERNETWORK:672 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;673 p4 = (struct iface_info_ipv4 *)p->Buffer;674 addr4->sin_family = AF_INET;675 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);676 677 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */678 addr4->sin_port = cpu_to_be16(CIFS_PORT);679 680 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,681 &addr4->sin_addr);682 break;683 case INTERNETWORKV6:684 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;685 p6 = (struct iface_info_ipv6 *)p->Buffer;686 addr6->sin6_family = AF_INET6;687 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);688 689 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */690 addr6->sin6_flowinfo = 0;691 addr6->sin6_scope_id = 0;692 addr6->sin6_port = cpu_to_be16(CIFS_PORT);693 694 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,695 &addr6->sin6_addr);696 break;697 default:698 cifs_dbg(VFS,699 "%s: skipping unsupported socket family\n",700 __func__);701 goto next_iface;702 }703 704 /*705 * The iface_list is assumed to be sorted by speed.706 * Check if the new interface exists in that list.707 * NEVER change iface. it could be in use.708 * Add a new one instead709 */710 spin_lock(&ses->iface_lock);711 list_for_each_entry_safe(iface, niface, &ses->iface_list,712 iface_head) {713 ret = iface_cmp(iface, &tmp_iface);714 if (!ret) {715 iface->is_active = 1;716 spin_unlock(&ses->iface_lock);717 goto next_iface;718 } else if (ret < 0) {719 /* all remaining ifaces are slower */720 kref_get(&iface->refcount);721 break;722 }723 }724 spin_unlock(&ses->iface_lock);725 726 /* no match. insert the entry in the list */727 info = kmalloc(sizeof(struct cifs_server_iface),728 GFP_KERNEL);729 if (!info) {730 rc = -ENOMEM;731 goto out;732 }733 memcpy(info, &tmp_iface, sizeof(tmp_iface));734 735 /* add this new entry to the list */736 kref_init(&info->refcount);737 info->is_active = 1;738 739 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);740 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);741 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,742 le32_to_cpu(p->Capability));743 744 spin_lock(&ses->iface_lock);745 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {746 list_add_tail(&info->iface_head, &iface->iface_head);747 kref_put(&iface->refcount, release_iface);748 } else749 list_add_tail(&info->iface_head, &ses->iface_list);750 751 ses->iface_count++;752 spin_unlock(&ses->iface_lock);753next_iface:754 nb_iface++;755 next = le32_to_cpu(p->Next);756 if (!next) {757 bytes_left -= sizeof(*p);758 break;759 }760 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);761 bytes_left -= next;762 }763 764 if (!nb_iface) {765 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);766 rc = -EINVAL;767 goto out;768 }769 770 /* Azure rounds the buffer size up 8, to a 16 byte boundary */771 if ((bytes_left > 8) || p->Next)772 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);773 774 ses->iface_last_update = jiffies;775 776out:777 /*778 * Go through the list again and put the inactive entries779 */780 spin_lock(&ses->iface_lock);781 list_for_each_entry_safe(iface, niface, &ses->iface_list,782 iface_head) {783 if (!iface->is_active) {784 list_del(&iface->iface_head);785 kref_put(&iface->refcount, release_iface);786 ses->iface_count--;787 }788 }789 spin_unlock(&ses->iface_lock);790 791 return rc;792}793 794int795SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)796{797 int rc;798 unsigned int ret_data_len = 0;799 struct network_interface_info_ioctl_rsp *out_buf = NULL;800 struct cifs_ses *ses = tcon->ses;801 struct TCP_Server_Info *pserver;802 803 /* do not query too frequently */804 if (ses->iface_last_update &&805 time_before(jiffies, ses->iface_last_update +806 (SMB_INTERFACE_POLL_INTERVAL * HZ)))807 return 0;808 809 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,810 FSCTL_QUERY_NETWORK_INTERFACE_INFO,811 NULL /* no data input */, 0 /* no data input */,812 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);813 if (rc == -EOPNOTSUPP) {814 cifs_dbg(FYI,815 "server does not support query network interfaces\n");816 ret_data_len = 0;817 } else if (rc != 0) {818 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);819 goto out;820 }821 822 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);823 if (rc)824 goto out;825 826 /* check if iface is still active */827 spin_lock(&ses->chan_lock);828 pserver = ses->chans[0].server;829 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {830 spin_unlock(&ses->chan_lock);831 cifs_chan_update_iface(ses, pserver);832 spin_lock(&ses->chan_lock);833 }834 spin_unlock(&ses->chan_lock);835 836out:837 kfree(out_buf);838 return rc;839}840 841static void842smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,843 struct cifs_sb_info *cifs_sb)844{845 int rc;846 __le16 srch_path = 0; /* Null - open root of share */847 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;848 struct cifs_open_parms oparms;849 struct cifs_fid fid;850 struct cached_fid *cfid = NULL;851 852 oparms = (struct cifs_open_parms) {853 .tcon = tcon,854 .path = "",855 .desired_access = FILE_READ_ATTRIBUTES,856 .disposition = FILE_OPEN,857 .create_options = cifs_create_options(cifs_sb, 0),858 .fid = &fid,859 };860 861 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);862 if (rc == 0)863 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));864 else865 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,866 NULL, NULL);867 if (rc)868 return;869 870 SMB3_request_interfaces(xid, tcon, true /* called during mount */);871 872 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,873 FS_ATTRIBUTE_INFORMATION);874 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,875 FS_DEVICE_INFORMATION);876 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,877 FS_VOLUME_INFORMATION);878 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,879 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */880 if (cfid == NULL)881 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);882 else883 close_cached_dir(cfid);884}885 886static void887smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,888 struct cifs_sb_info *cifs_sb)889{890 int rc;891 __le16 srch_path = 0; /* Null - open root of share */892 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;893 struct cifs_open_parms oparms;894 struct cifs_fid fid;895 896 oparms = (struct cifs_open_parms) {897 .tcon = tcon,898 .path = "",899 .desired_access = FILE_READ_ATTRIBUTES,900 .disposition = FILE_OPEN,901 .create_options = cifs_create_options(cifs_sb, 0),902 .fid = &fid,903 };904 905 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,906 NULL, NULL);907 if (rc)908 return;909 910 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,911 FS_ATTRIBUTE_INFORMATION);912 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,913 FS_DEVICE_INFORMATION);914 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);915}916 917static int918smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,919 struct cifs_sb_info *cifs_sb, const char *full_path)920{921 __le16 *utf16_path;922 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;923 int err_buftype = CIFS_NO_BUFFER;924 struct cifs_open_parms oparms;925 struct kvec err_iov = {};926 struct cifs_fid fid;927 struct cached_fid *cfid;928 bool islink;929 int rc, rc2;930 931 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);932 if (!rc) {933 if (cfid->has_lease) {934 close_cached_dir(cfid);935 return 0;936 }937 close_cached_dir(cfid);938 }939 940 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);941 if (!utf16_path)942 return -ENOMEM;943 944 oparms = (struct cifs_open_parms) {945 .tcon = tcon,946 .path = full_path,947 .desired_access = FILE_READ_ATTRIBUTES,948 .disposition = FILE_OPEN,949 .create_options = cifs_create_options(cifs_sb, 0),950 .fid = &fid,951 };952 953 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,954 &err_iov, &err_buftype);955 if (rc) {956 struct smb2_hdr *hdr = err_iov.iov_base;957 958 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))959 goto out;960 961 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {962 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,963 full_path, &islink);964 if (rc2) {965 rc = rc2;966 goto out;967 }968 if (islink)969 rc = -EREMOTE;970 }971 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&972 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))973 rc = -EOPNOTSUPP;974 goto out;975 }976 977 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);978 979out:980 free_rsp_buf(err_buftype, err_iov.iov_base);981 kfree(utf16_path);982 return rc;983}984 985static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,986 struct cifs_sb_info *cifs_sb, const char *full_path,987 u64 *uniqueid, struct cifs_open_info_data *data)988{989 *uniqueid = le64_to_cpu(data->fi.IndexNumber);990 return 0;991}992 993static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,994 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)995{996 struct cifs_fid *fid = &cfile->fid;997 998 if (cfile->symlink_target) {999 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);1000 if (!data->symlink_target)1001 return -ENOMEM;1002 }1003 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);1004}1005 1006#ifdef CONFIG_CIFS_XATTR1007static ssize_t1008move_smb2_ea_to_cifs(char *dst, size_t dst_size,1009 struct smb2_file_full_ea_info *src, size_t src_size,1010 const unsigned char *ea_name)1011{1012 int rc = 0;1013 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;1014 char *name, *value;1015 size_t buf_size = dst_size;1016 size_t name_len, value_len, user_name_len;1017 1018 while (src_size > 0) {1019 name_len = (size_t)src->ea_name_length;1020 value_len = (size_t)le16_to_cpu(src->ea_value_length);1021 1022 if (name_len == 0)1023 break;1024 1025 if (src_size < 8 + name_len + 1 + value_len) {1026 cifs_dbg(FYI, "EA entry goes beyond length of list\n");1027 rc = -EIO;1028 goto out;1029 }1030 1031 name = &src->ea_data[0];1032 value = &src->ea_data[src->ea_name_length + 1];1033 1034 if (ea_name) {1035 if (ea_name_len == name_len &&1036 memcmp(ea_name, name, name_len) == 0) {1037 rc = value_len;1038 if (dst_size == 0)1039 goto out;1040 if (dst_size < value_len) {1041 rc = -ERANGE;1042 goto out;1043 }1044 memcpy(dst, value, value_len);1045 goto out;1046 }1047 } else {1048 /* 'user.' plus a terminating null */1049 user_name_len = 5 + 1 + name_len;1050 1051 if (buf_size == 0) {1052 /* skip copy - calc size only */1053 rc += user_name_len;1054 } else if (dst_size >= user_name_len) {1055 dst_size -= user_name_len;1056 memcpy(dst, "user.", 5);1057 dst += 5;1058 memcpy(dst, src->ea_data, name_len);1059 dst += name_len;1060 *dst = 0;1061 ++dst;1062 rc += user_name_len;1063 } else {1064 /* stop before overrun buffer */1065 rc = -ERANGE;1066 break;1067 }1068 }1069 1070 if (!src->next_entry_offset)1071 break;1072 1073 if (src_size < le32_to_cpu(src->next_entry_offset)) {1074 /* stop before overrun buffer */1075 rc = -ERANGE;1076 break;1077 }1078 src_size -= le32_to_cpu(src->next_entry_offset);1079 src = (void *)((char *)src +1080 le32_to_cpu(src->next_entry_offset));1081 }1082 1083 /* didn't find the named attribute */1084 if (ea_name)1085 rc = -ENODATA;1086 1087out:1088 return (ssize_t)rc;1089}1090 1091static ssize_t1092smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,1093 const unsigned char *path, const unsigned char *ea_name,1094 char *ea_data, size_t buf_size,1095 struct cifs_sb_info *cifs_sb)1096{1097 int rc;1098 struct kvec rsp_iov = {NULL, 0};1099 int buftype = CIFS_NO_BUFFER;1100 struct smb2_query_info_rsp *rsp;1101 struct smb2_file_full_ea_info *info = NULL;1102 1103 rc = smb2_query_info_compound(xid, tcon, path,1104 FILE_READ_EA,1105 FILE_FULL_EA_INFORMATION,1106 SMB2_O_INFO_FILE,1107 CIFSMaxBufSize -1108 MAX_SMB2_CREATE_RESPONSE_SIZE -1109 MAX_SMB2_CLOSE_RESPONSE_SIZE,1110 &rsp_iov, &buftype, cifs_sb);1111 if (rc) {1112 /*1113 * If ea_name is NULL (listxattr) and there are no EAs,1114 * return 0 as it's not an error. Otherwise, the specified1115 * ea_name was not found.1116 */1117 if (!ea_name && rc == -ENODATA)1118 rc = 0;1119 goto qeas_exit;1120 }1121 1122 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;1123 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),1124 le32_to_cpu(rsp->OutputBufferLength),1125 &rsp_iov,1126 sizeof(struct smb2_file_full_ea_info));1127 if (rc)1128 goto qeas_exit;1129 1130 info = (struct smb2_file_full_ea_info *)(1131 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);1132 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,1133 le32_to_cpu(rsp->OutputBufferLength), ea_name);1134 1135 qeas_exit:1136 free_rsp_buf(buftype, rsp_iov.iov_base);1137 return rc;1138}1139 1140static int1141smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,1142 const char *path, const char *ea_name, const void *ea_value,1143 const __u16 ea_value_len, const struct nls_table *nls_codepage,1144 struct cifs_sb_info *cifs_sb)1145{1146 struct smb2_compound_vars *vars;1147 struct cifs_ses *ses = tcon->ses;1148 struct TCP_Server_Info *server;1149 struct smb_rqst *rqst;1150 struct kvec *rsp_iov;1151 __le16 *utf16_path = NULL;1152 int ea_name_len = strlen(ea_name);1153 int flags = CIFS_CP_CREATE_CLOSE_OP;1154 int len;1155 int resp_buftype[3];1156 struct cifs_open_parms oparms;1157 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;1158 struct cifs_fid fid;1159 unsigned int size[1];1160 void *data[1];1161 struct smb2_file_full_ea_info *ea;1162 struct smb2_query_info_rsp *rsp;1163 int rc, used_len = 0;1164 int retries = 0, cur_sleep = 1;1165 1166replay_again:1167 /* reinitialize for possible replay */1168 flags = CIFS_CP_CREATE_CLOSE_OP;1169 oplock = SMB2_OPLOCK_LEVEL_NONE;1170 server = cifs_pick_channel(ses);1171 1172 if (smb3_encryption_required(tcon))1173 flags |= CIFS_TRANSFORM_REQ;1174 1175 if (ea_name_len > 255)1176 return -EINVAL;1177 1178 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);1179 if (!utf16_path)1180 return -ENOMEM;1181 1182 ea = NULL;1183 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;1184 vars = kzalloc(sizeof(*vars), GFP_KERNEL);1185 if (!vars) {1186 rc = -ENOMEM;1187 goto out_free_path;1188 }1189 rqst = vars->rqst;1190 rsp_iov = vars->rsp_iov;1191 1192 if (ses->server->ops->query_all_EAs) {1193 if (!ea_value) {1194 rc = ses->server->ops->query_all_EAs(xid, tcon, path,1195 ea_name, NULL, 0,1196 cifs_sb);1197 if (rc == -ENODATA)1198 goto sea_exit;1199 } else {1200 /* If we are adding a attribute we should first check1201 * if there will be enough space available to store1202 * the new EA. If not we should not add it since we1203 * would not be able to even read the EAs back.1204 */1205 rc = smb2_query_info_compound(xid, tcon, path,1206 FILE_READ_EA,1207 FILE_FULL_EA_INFORMATION,1208 SMB2_O_INFO_FILE,1209 CIFSMaxBufSize -1210 MAX_SMB2_CREATE_RESPONSE_SIZE -1211 MAX_SMB2_CLOSE_RESPONSE_SIZE,1212 &rsp_iov[1], &resp_buftype[1], cifs_sb);1213 if (rc == 0) {1214 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;1215 used_len = le32_to_cpu(rsp->OutputBufferLength);1216 }1217 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);1218 resp_buftype[1] = CIFS_NO_BUFFER;1219 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));1220 rc = 0;1221 1222 /* Use a fudge factor of 256 bytes in case we collide1223 * with a different set_EAs command.1224 */1225 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -1226 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <1227 used_len + ea_name_len + ea_value_len + 1) {1228 rc = -ENOSPC;1229 goto sea_exit;1230 }1231 }1232 }1233 1234 /* Open */1235 rqst[0].rq_iov = vars->open_iov;1236 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;1237 1238 oparms = (struct cifs_open_parms) {1239 .tcon = tcon,1240 .path = path,1241 .desired_access = FILE_WRITE_EA,1242 .disposition = FILE_OPEN,1243 .create_options = cifs_create_options(cifs_sb, 0),1244 .fid = &fid,1245 .replay = !!(retries),1246 };1247 1248 rc = SMB2_open_init(tcon, server,1249 &rqst[0], &oplock, &oparms, utf16_path);1250 if (rc)1251 goto sea_exit;1252 smb2_set_next_command(tcon, &rqst[0]);1253 1254 1255 /* Set Info */1256 rqst[1].rq_iov = vars->si_iov;1257 rqst[1].rq_nvec = 1;1258 1259 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;1260 ea = kzalloc(len, GFP_KERNEL);1261 if (ea == NULL) {1262 rc = -ENOMEM;1263 goto sea_exit;1264 }1265 1266 ea->ea_name_length = ea_name_len;1267 ea->ea_value_length = cpu_to_le16(ea_value_len);1268 memcpy(ea->ea_data, ea_name, ea_name_len + 1);1269 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);1270 1271 size[0] = len;1272 data[0] = ea;1273 1274 rc = SMB2_set_info_init(tcon, server,1275 &rqst[1], COMPOUND_FID,1276 COMPOUND_FID, current->tgid,1277 FILE_FULL_EA_INFORMATION,1278 SMB2_O_INFO_FILE, 0, data, size);1279 if (rc)1280 goto sea_exit;1281 smb2_set_next_command(tcon, &rqst[1]);1282 smb2_set_related(&rqst[1]);1283 1284 /* Close */1285 rqst[2].rq_iov = &vars->close_iov;1286 rqst[2].rq_nvec = 1;1287 rc = SMB2_close_init(tcon, server,1288 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);1289 if (rc)1290 goto sea_exit;1291 smb2_set_related(&rqst[2]);1292 1293 if (retries) {1294 smb2_set_replay(server, &rqst[0]);1295 smb2_set_replay(server, &rqst[1]);1296 smb2_set_replay(server, &rqst[2]);1297 }1298 1299 rc = compound_send_recv(xid, ses, server,1300 flags, 3, rqst,1301 resp_buftype, rsp_iov);1302 /* no need to bump num_remote_opens because handle immediately closed */1303 1304 sea_exit:1305 kfree(ea);1306 SMB2_open_free(&rqst[0]);1307 SMB2_set_info_free(&rqst[1]);1308 SMB2_close_free(&rqst[2]);1309 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);1310 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);1311 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);1312 kfree(vars);1313out_free_path:1314 kfree(utf16_path);1315 1316 if (is_replayable_error(rc) &&1317 smb2_should_replay(tcon, &retries, &cur_sleep))1318 goto replay_again;1319 1320 return rc;1321}1322#endif1323 1324static bool1325smb2_can_echo(struct TCP_Server_Info *server)1326{1327 return server->echoes;1328}1329 1330static void1331smb2_clear_stats(struct cifs_tcon *tcon)1332{1333 int i;1334 1335 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {1336 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);1337 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);1338 }1339}1340 1341static void1342smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)1343{1344 seq_puts(m, "\n\tShare Capabilities:");1345 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)1346 seq_puts(m, " DFS,");1347 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)1348 seq_puts(m, " CONTINUOUS AVAILABILITY,");1349 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)1350 seq_puts(m, " SCALEOUT,");1351 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)1352 seq_puts(m, " CLUSTER,");1353 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)1354 seq_puts(m, " ASYMMETRIC,");1355 if (tcon->capabilities == 0)1356 seq_puts(m, " None");1357 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)1358 seq_puts(m, " Aligned,");1359 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)1360 seq_puts(m, " Partition Aligned,");1361 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)1362 seq_puts(m, " SSD,");1363 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)1364 seq_puts(m, " TRIM-support,");1365 1366 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);1367 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);1368 if (tcon->perf_sector_size)1369 seq_printf(m, "\tOptimal sector size: 0x%x",1370 tcon->perf_sector_size);1371 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);1372}1373 1374static void1375smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)1376{1377 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;1378 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;1379 1380 /*1381 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO1382 * totals (requests sent) since those SMBs are per-session not per tcon1383 */1384 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",1385 (long long)(tcon->bytes_read),1386 (long long)(tcon->bytes_written));1387 seq_printf(m, "\nOpen files: %d total (local), %d open on server",1388 atomic_read(&tcon->num_local_opens),1389 atomic_read(&tcon->num_remote_opens));1390 seq_printf(m, "\nTreeConnects: %d total %d failed",1391 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),1392 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));1393 seq_printf(m, "\nTreeDisconnects: %d total %d failed",1394 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),1395 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));1396 seq_printf(m, "\nCreates: %d total %d failed",1397 atomic_read(&sent[SMB2_CREATE_HE]),1398 atomic_read(&failed[SMB2_CREATE_HE]));1399 seq_printf(m, "\nCloses: %d total %d failed",1400 atomic_read(&sent[SMB2_CLOSE_HE]),1401 atomic_read(&failed[SMB2_CLOSE_HE]));1402 seq_printf(m, "\nFlushes: %d total %d failed",1403 atomic_read(&sent[SMB2_FLUSH_HE]),1404 atomic_read(&failed[SMB2_FLUSH_HE]));1405 seq_printf(m, "\nReads: %d total %d failed",1406 atomic_read(&sent[SMB2_READ_HE]),1407 atomic_read(&failed[SMB2_READ_HE]));1408 seq_printf(m, "\nWrites: %d total %d failed",1409 atomic_read(&sent[SMB2_WRITE_HE]),1410 atomic_read(&failed[SMB2_WRITE_HE]));1411 seq_printf(m, "\nLocks: %d total %d failed",1412 atomic_read(&sent[SMB2_LOCK_HE]),1413 atomic_read(&failed[SMB2_LOCK_HE]));1414 seq_printf(m, "\nIOCTLs: %d total %d failed",1415 atomic_read(&sent[SMB2_IOCTL_HE]),1416 atomic_read(&failed[SMB2_IOCTL_HE]));1417 seq_printf(m, "\nQueryDirectories: %d total %d failed",1418 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),1419 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));1420 seq_printf(m, "\nChangeNotifies: %d total %d failed",1421 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),1422 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));1423 seq_printf(m, "\nQueryInfos: %d total %d failed",1424 atomic_read(&sent[SMB2_QUERY_INFO_HE]),1425 atomic_read(&failed[SMB2_QUERY_INFO_HE]));1426 seq_printf(m, "\nSetInfos: %d total %d failed",1427 atomic_read(&sent[SMB2_SET_INFO_HE]),1428 atomic_read(&failed[SMB2_SET_INFO_HE]));1429 seq_printf(m, "\nOplockBreaks: %d sent %d failed",1430 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),1431 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));1432}1433 1434static void1435smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)1436{1437 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));1438 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;1439 1440 cfile->fid.persistent_fid = fid->persistent_fid;1441 cfile->fid.volatile_fid = fid->volatile_fid;1442 cfile->fid.access = fid->access;1443#ifdef CONFIG_CIFS_DEBUG21444 cfile->fid.mid = fid->mid;1445#endif /* CIFS_DEBUG2 */1446 server->ops->set_oplock_level(cinode, oplock, fid->epoch,1447 &fid->purge_cache);1448 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);1449 memcpy(cfile->fid.create_guid, fid->create_guid, 16);1450}1451 1452static int1453smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,1454 struct cifs_fid *fid)1455{1456 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);1457}1458 1459static int1460smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,1461 struct cifsFileInfo *cfile)1462{1463 struct smb2_file_network_open_info file_inf;1464 struct inode *inode;1465 int rc;1466 1467 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,1468 cfile->fid.volatile_fid, &file_inf);1469 if (rc)1470 return rc;1471 1472 inode = d_inode(cfile->dentry);1473 1474 spin_lock(&inode->i_lock);1475 CIFS_I(inode)->time = jiffies;1476 1477 /* Creation time should not need to be updated on close */1478 if (file_inf.LastWriteTime)1479 inode_set_mtime_to_ts(inode,1480 cifs_NTtimeToUnix(file_inf.LastWriteTime));1481 if (file_inf.ChangeTime)1482 inode_set_ctime_to_ts(inode,1483 cifs_NTtimeToUnix(file_inf.ChangeTime));1484 if (file_inf.LastAccessTime)1485 inode_set_atime_to_ts(inode,1486 cifs_NTtimeToUnix(file_inf.LastAccessTime));1487 1488 /*1489 * i_blocks is not related to (i_size / i_blksize),1490 * but instead 512 byte (2**9) size is required for1491 * calculating num blocks.1492 */1493 if (le64_to_cpu(file_inf.AllocationSize) > 4096)1494 inode->i_blocks =1495 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;1496 1497 /* End of file and Attributes should not have to be updated on close */1498 spin_unlock(&inode->i_lock);1499 return rc;1500}1501 1502static int1503SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,1504 u64 persistent_fid, u64 volatile_fid,1505 struct copychunk_ioctl *pcchunk)1506{1507 int rc;1508 unsigned int ret_data_len;1509 struct resume_key_req *res_key;1510 1511 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,1512 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,1513 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);1514 1515 if (rc == -EOPNOTSUPP) {1516 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);1517 goto req_res_key_exit;1518 } else if (rc) {1519 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);1520 goto req_res_key_exit;1521 }1522 if (ret_data_len < sizeof(struct resume_key_req)) {1523 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");1524 rc = -EINVAL;1525 goto req_res_key_exit;1526 }1527 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);1528 1529req_res_key_exit:1530 kfree(res_key);1531 return rc;1532}1533 1534static int1535smb2_ioctl_query_info(const unsigned int xid,1536 struct cifs_tcon *tcon,1537 struct cifs_sb_info *cifs_sb,1538 __le16 *path, int is_dir,1539 unsigned long p)1540{1541 struct smb2_compound_vars *vars;1542 struct smb_rqst *rqst;1543 struct kvec *rsp_iov;1544 struct cifs_ses *ses = tcon->ses;1545 struct TCP_Server_Info *server;1546 char __user *arg = (char __user *)p;1547 struct smb_query_info qi;1548 struct smb_query_info __user *pqi;1549 int rc = 0;1550 int flags = CIFS_CP_CREATE_CLOSE_OP;1551 struct smb2_query_info_rsp *qi_rsp = NULL;1552 struct smb2_ioctl_rsp *io_rsp = NULL;1553 void *buffer = NULL;1554 int resp_buftype[3];1555 struct cifs_open_parms oparms;1556 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;1557 struct cifs_fid fid;1558 unsigned int size[2];1559 void *data[2];1560 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;1561 void (*free_req1_func)(struct smb_rqst *r);1562 int retries = 0, cur_sleep = 1;1563 1564replay_again:1565 /* reinitialize for possible replay */1566 flags = CIFS_CP_CREATE_CLOSE_OP;1567 oplock = SMB2_OPLOCK_LEVEL_NONE;1568 server = cifs_pick_channel(ses);1569 1570 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);1571 if (vars == NULL)1572 return -ENOMEM;1573 rqst = &vars->rqst[0];1574 rsp_iov = &vars->rsp_iov[0];1575 1576 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;1577 1578 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {1579 rc = -EFAULT;1580 goto free_vars;1581 }1582 if (qi.output_buffer_length > 1024) {1583 rc = -EINVAL;1584 goto free_vars;1585 }1586 1587 if (!ses || !server) {1588 rc = -EIO;1589 goto free_vars;1590 }1591 1592 if (smb3_encryption_required(tcon))1593 flags |= CIFS_TRANSFORM_REQ;1594 1595 if (qi.output_buffer_length) {1596 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);1597 if (IS_ERR(buffer)) {1598 rc = PTR_ERR(buffer);1599 goto free_vars;1600 }1601 }1602 1603 /* Open */1604 rqst[0].rq_iov = &vars->open_iov[0];1605 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;1606 1607 oparms = (struct cifs_open_parms) {1608 .tcon = tcon,1609 .disposition = FILE_OPEN,1610 .create_options = cifs_create_options(cifs_sb, create_options),1611 .fid = &fid,1612 .replay = !!(retries),1613 };1614 1615 if (qi.flags & PASSTHRU_FSCTL) {1616 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {1617 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:1618 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;1619 break;1620 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:1621 oparms.desired_access = GENERIC_ALL;1622 break;1623 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:1624 oparms.desired_access = GENERIC_READ;1625 break;1626 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:1627 oparms.desired_access = GENERIC_WRITE;1628 break;1629 }1630 } else if (qi.flags & PASSTHRU_SET_INFO) {1631 oparms.desired_access = GENERIC_WRITE;1632 } else {1633 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;1634 }1635 1636 rc = SMB2_open_init(tcon, server,1637 &rqst[0], &oplock, &oparms, path);1638 if (rc)1639 goto free_output_buffer;1640 smb2_set_next_command(tcon, &rqst[0]);1641 1642 /* Query */1643 if (qi.flags & PASSTHRU_FSCTL) {1644 /* Can eventually relax perm check since server enforces too */1645 if (!capable(CAP_SYS_ADMIN)) {1646 rc = -EPERM;1647 goto free_open_req;1648 }1649 rqst[1].rq_iov = &vars->io_iov[0];1650 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;1651 1652 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,1653 qi.info_type, buffer, qi.output_buffer_length,1654 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -1655 MAX_SMB2_CLOSE_RESPONSE_SIZE);1656 free_req1_func = SMB2_ioctl_free;1657 } else if (qi.flags == PASSTHRU_SET_INFO) {1658 /* Can eventually relax perm check since server enforces too */1659 if (!capable(CAP_SYS_ADMIN)) {1660 rc = -EPERM;1661 goto free_open_req;1662 }1663 if (qi.output_buffer_length < 8) {1664 rc = -EINVAL;1665 goto free_open_req;1666 }1667 rqst[1].rq_iov = vars->si_iov;1668 rqst[1].rq_nvec = 1;1669 1670 /* MS-FSCC 2.4.13 FileEndOfFileInformation */1671 size[0] = 8;1672 data[0] = buffer;1673 1674 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,1675 current->tgid, FILE_END_OF_FILE_INFORMATION,1676 SMB2_O_INFO_FILE, 0, data, size);1677 free_req1_func = SMB2_set_info_free;1678 } else if (qi.flags == PASSTHRU_QUERY_INFO) {1679 rqst[1].rq_iov = &vars->qi_iov;1680 rqst[1].rq_nvec = 1;1681 1682 rc = SMB2_query_info_init(tcon, server,1683 &rqst[1], COMPOUND_FID,1684 COMPOUND_FID, qi.file_info_class,1685 qi.info_type, qi.additional_information,1686 qi.input_buffer_length,1687 qi.output_buffer_length, buffer);1688 free_req1_func = SMB2_query_info_free;1689 } else { /* unknown flags */1690 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",1691 qi.flags);1692 rc = -EINVAL;1693 }1694 1695 if (rc)1696 goto free_open_req;1697 smb2_set_next_command(tcon, &rqst[1]);1698 smb2_set_related(&rqst[1]);1699 1700 /* Close */1701 rqst[2].rq_iov = &vars->close_iov;1702 rqst[2].rq_nvec = 1;1703 1704 rc = SMB2_close_init(tcon, server,1705 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);1706 if (rc)1707 goto free_req_1;1708 smb2_set_related(&rqst[2]);1709 1710 if (retries) {1711 smb2_set_replay(server, &rqst[0]);1712 smb2_set_replay(server, &rqst[1]);1713 smb2_set_replay(server, &rqst[2]);1714 }1715 1716 rc = compound_send_recv(xid, ses, server,1717 flags, 3, rqst,1718 resp_buftype, rsp_iov);1719 if (rc)1720 goto out;1721 1722 /* No need to bump num_remote_opens since handle immediately closed */1723 if (qi.flags & PASSTHRU_FSCTL) {1724 pqi = (struct smb_query_info __user *)arg;1725 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;1726 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)1727 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);1728 if (qi.input_buffer_length > 0 &&1729 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length1730 > rsp_iov[1].iov_len) {1731 rc = -EFAULT;1732 goto out;1733 }1734 1735 if (copy_to_user(&pqi->input_buffer_length,1736 &qi.input_buffer_length,1737 sizeof(qi.input_buffer_length))) {1738 rc = -EFAULT;1739 goto out;1740 }1741 1742 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),1743 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),1744 qi.input_buffer_length))1745 rc = -EFAULT;1746 } else {1747 pqi = (struct smb_query_info __user *)arg;1748 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;1749 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)1750 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);1751 if (copy_to_user(&pqi->input_buffer_length,1752 &qi.input_buffer_length,1753 sizeof(qi.input_buffer_length))) {1754 rc = -EFAULT;1755 goto out;1756 }1757 1758 if (copy_to_user(pqi + 1, qi_rsp->Buffer,1759 qi.input_buffer_length))1760 rc = -EFAULT;1761 }1762 1763out:1764 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);1765 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);1766 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);1767 SMB2_close_free(&rqst[2]);1768free_req_1:1769 free_req1_func(&rqst[1]);1770free_open_req:1771 SMB2_open_free(&rqst[0]);1772free_output_buffer:1773 kfree(buffer);1774free_vars:1775 kfree(vars);1776 1777 if (is_replayable_error(rc) &&1778 smb2_should_replay(tcon, &retries, &cur_sleep))1779 goto replay_again;1780 1781 return rc;1782}1783 1784static ssize_t1785smb2_copychunk_range(const unsigned int xid,1786 struct cifsFileInfo *srcfile,1787 struct cifsFileInfo *trgtfile, u64 src_off,1788 u64 len, u64 dest_off)1789{1790 int rc;1791 unsigned int ret_data_len;1792 struct copychunk_ioctl *pcchunk;1793 struct copychunk_ioctl_rsp *retbuf = NULL;1794 struct cifs_tcon *tcon;1795 int chunks_copied = 0;1796 bool chunk_sizes_updated = false;1797 ssize_t bytes_written, total_bytes_written = 0;1798 1799 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);1800 if (pcchunk == NULL)1801 return -ENOMEM;1802 1803 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);1804 /* Request a key from the server to identify the source of the copy */1805 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),1806 srcfile->fid.persistent_fid,1807 srcfile->fid.volatile_fid, pcchunk);1808 1809 /* Note: request_res_key sets res_key null only if rc !=0 */1810 if (rc)1811 goto cchunk_out;1812 1813 /* For now array only one chunk long, will make more flexible later */1814 pcchunk->ChunkCount = cpu_to_le32(1);1815 pcchunk->Reserved = 0;1816 pcchunk->Reserved2 = 0;1817 1818 tcon = tlink_tcon(trgtfile->tlink);1819 1820 trace_smb3_copychunk_enter(xid, srcfile->fid.volatile_fid,1821 trgtfile->fid.volatile_fid, tcon->tid,1822 tcon->ses->Suid, src_off, dest_off, len);1823 1824 while (len > 0) {1825 pcchunk->SourceOffset = cpu_to_le64(src_off);1826 pcchunk->TargetOffset = cpu_to_le64(dest_off);1827 pcchunk->Length =1828 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));1829 1830 /* Request server copy to target from src identified by key */1831 kfree(retbuf);1832 retbuf = NULL;1833 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,1834 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,1835 (char *)pcchunk, sizeof(struct copychunk_ioctl),1836 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);1837 if (rc == 0) {1838 if (ret_data_len !=1839 sizeof(struct copychunk_ioctl_rsp)) {1840 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");1841 rc = -EIO;1842 goto cchunk_out;1843 }1844 if (retbuf->TotalBytesWritten == 0) {1845 cifs_dbg(FYI, "no bytes copied\n");1846 rc = -EIO;1847 goto cchunk_out;1848 }1849 /*1850 * Check if server claimed to write more than we asked1851 */1852 if (le32_to_cpu(retbuf->TotalBytesWritten) >1853 le32_to_cpu(pcchunk->Length)) {1854 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");1855 rc = -EIO;1856 goto cchunk_out;1857 }1858 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {1859 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");1860 rc = -EIO;1861 goto cchunk_out;1862 }1863 chunks_copied++;1864 1865 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);1866 src_off += bytes_written;1867 dest_off += bytes_written;1868 len -= bytes_written;1869 total_bytes_written += bytes_written;1870 1871 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",1872 le32_to_cpu(retbuf->ChunksWritten),1873 le32_to_cpu(retbuf->ChunkBytesWritten),1874 bytes_written);1875 trace_smb3_copychunk_done(xid, srcfile->fid.volatile_fid,1876 trgtfile->fid.volatile_fid, tcon->tid,1877 tcon->ses->Suid, src_off, dest_off, len);1878 } else if (rc == -EINVAL) {1879 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))1880 goto cchunk_out;1881 1882 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",1883 le32_to_cpu(retbuf->ChunksWritten),1884 le32_to_cpu(retbuf->ChunkBytesWritten),1885 le32_to_cpu(retbuf->TotalBytesWritten));1886 1887 /*1888 * Check if this is the first request using these sizes,1889 * (ie check if copy succeed once with original sizes1890 * and check if the server gave us different sizes after1891 * we already updated max sizes on previous request).1892 * if not then why is the server returning an error now1893 */1894 if ((chunks_copied != 0) || chunk_sizes_updated)1895 goto cchunk_out;1896 1897 /* Check that server is not asking us to grow size */1898 if (le32_to_cpu(retbuf->ChunkBytesWritten) <1899 tcon->max_bytes_chunk)1900 tcon->max_bytes_chunk =1901 le32_to_cpu(retbuf->ChunkBytesWritten);1902 else1903 goto cchunk_out; /* server gave us bogus size */1904 1905 /* No need to change MaxChunks since already set to 1 */1906 chunk_sizes_updated = true;1907 } else1908 goto cchunk_out;1909 }1910 1911cchunk_out:1912 kfree(pcchunk);1913 kfree(retbuf);1914 if (rc)1915 return rc;1916 else1917 return total_bytes_written;1918}1919 1920static int1921smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,1922 struct cifs_fid *fid)1923{1924 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);1925}1926 1927static unsigned int1928smb2_read_data_offset(char *buf)1929{1930 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;1931 1932 return rsp->DataOffset;1933}1934 1935static unsigned int1936smb2_read_data_length(char *buf, bool in_remaining)1937{1938 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;1939 1940 if (in_remaining)1941 return le32_to_cpu(rsp->DataRemaining);1942 1943 return le32_to_cpu(rsp->DataLength);1944}1945 1946 1947static int1948smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,1949 struct cifs_io_parms *parms, unsigned int *bytes_read,1950 char **buf, int *buf_type)1951{1952 parms->persistent_fid = pfid->persistent_fid;1953 parms->volatile_fid = pfid->volatile_fid;1954 return SMB2_read(xid, parms, bytes_read, buf, buf_type);1955}1956 1957static int1958smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,1959 struct cifs_io_parms *parms, unsigned int *written,1960 struct kvec *iov, unsigned long nr_segs)1961{1962 1963 parms->persistent_fid = pfid->persistent_fid;1964 parms->volatile_fid = pfid->volatile_fid;1965 return SMB2_write(xid, parms, written, iov, nr_segs);1966}1967 1968/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */1969static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,1970 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)1971{1972 struct cifsInodeInfo *cifsi;1973 int rc;1974 1975 cifsi = CIFS_I(inode);1976 1977 /* if file already sparse don't bother setting sparse again */1978 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)1979 return true; /* already sparse */1980 1981 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)1982 return true; /* already not sparse */1983 1984 /*1985 * Can't check for sparse support on share the usual way via the1986 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share1987 * since Samba server doesn't set the flag on the share, yet1988 * supports the set sparse FSCTL and returns sparse correctly1989 * in the file attributes. If we fail setting sparse though we1990 * mark that server does not support sparse files for this share1991 * to avoid repeatedly sending the unsupported fsctl to server1992 * if the file is repeatedly extended.1993 */1994 if (tcon->broken_sparse_sup)1995 return false;1996 1997 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,1998 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,1999 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);2000 if (rc) {2001 tcon->broken_sparse_sup = true;2002 cifs_dbg(FYI, "set sparse rc = %d\n", rc);2003 return false;2004 }2005 2006 if (setsparse)2007 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;2008 else2009 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);2010 2011 return true;2012}2013 2014static int2015smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,2016 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)2017{2018 struct inode *inode;2019 2020 /*2021 * If extending file more than one page make sparse. Many Linux fs2022 * make files sparse by default when extending via ftruncate2023 */2024 inode = d_inode(cfile->dentry);2025 2026 if (!set_alloc && (size > inode->i_size + 8192)) {2027 __u8 set_sparse = 1;2028 2029 /* whether set sparse succeeds or not, extend the file */2030 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);2031 }2032 2033 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,2034 cfile->fid.volatile_fid, cfile->pid, size);2035}2036 2037static int2038smb2_duplicate_extents(const unsigned int xid,2039 struct cifsFileInfo *srcfile,2040 struct cifsFileInfo *trgtfile, u64 src_off,2041 u64 len, u64 dest_off)2042{2043 int rc;2044 unsigned int ret_data_len;2045 struct inode *inode;2046 struct duplicate_extents_to_file dup_ext_buf;2047 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);2048 2049 /* server fileays advertise duplicate extent support with this flag */2050 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &2051 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)2052 return -EOPNOTSUPP;2053 2054 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;2055 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;2056 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);2057 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);2058 dup_ext_buf.ByteCount = cpu_to_le64(len);2059 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",2060 src_off, dest_off, len);2061 trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid,2062 trgtfile->fid.volatile_fid, tcon->tid,2063 tcon->ses->Suid, src_off, dest_off, len);2064 inode = d_inode(trgtfile->dentry);2065 if (inode->i_size < dest_off + len) {2066 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);2067 if (rc)2068 goto duplicate_extents_out;2069 2070 /*2071 * Although also could set plausible allocation size (i_blocks)2072 * here in addition to setting the file size, in reflink2073 * it is likely that the target file is sparse. Its allocation2074 * size will be queried on next revalidate, but it is important2075 * to make sure that file's cached size is updated immediately2076 */2077 netfs_resize_file(netfs_inode(inode), dest_off + len, true);2078 cifs_setsize(inode, dest_off + len);2079 }2080 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,2081 trgtfile->fid.volatile_fid,2082 FSCTL_DUPLICATE_EXTENTS_TO_FILE,2083 (char *)&dup_ext_buf,2084 sizeof(struct duplicate_extents_to_file),2085 CIFSMaxBufSize, NULL,2086 &ret_data_len);2087 2088 if (ret_data_len > 0)2089 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");2090 2091duplicate_extents_out:2092 if (rc)2093 trace_smb3_clone_err(xid, srcfile->fid.volatile_fid,2094 trgtfile->fid.volatile_fid,2095 tcon->tid, tcon->ses->Suid, src_off,2096 dest_off, len, rc);2097 else2098 trace_smb3_clone_done(xid, srcfile->fid.volatile_fid,2099 trgtfile->fid.volatile_fid, tcon->tid,2100 tcon->ses->Suid, src_off, dest_off, len);2101 return rc;2102}2103 2104static int2105smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,2106 struct cifsFileInfo *cfile)2107{2108 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,2109 cfile->fid.volatile_fid);2110}2111 2112static int2113smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,2114 struct cifsFileInfo *cfile)2115{2116 struct fsctl_set_integrity_information_req integr_info;2117 unsigned int ret_data_len;2118 2119 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);2120 integr_info.Flags = 0;2121 integr_info.Reserved = 0;2122 2123 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,2124 cfile->fid.volatile_fid,2125 FSCTL_SET_INTEGRITY_INFORMATION,2126 (char *)&integr_info,2127 sizeof(struct fsctl_set_integrity_information_req),2128 CIFSMaxBufSize, NULL,2129 &ret_data_len);2130 2131}2132 2133/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */2134#define GMT_TOKEN_SIZE 502135 2136#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */2137 2138/*2139 * Input buffer contains (empty) struct smb_snapshot array with size filled in2140 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.22141 */2142static int2143smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,2144 struct cifsFileInfo *cfile, void __user *ioc_buf)2145{2146 char *retbuf = NULL;2147 unsigned int ret_data_len = 0;2148 int rc;2149 u32 max_response_size;2150 struct smb_snapshot_array snapshot_in;2151 2152 /*2153 * On the first query to enumerate the list of snapshots available2154 * for this volume the buffer begins with 0 (number of snapshots2155 * which can be returned is zero since at that point we do not know2156 * how big the buffer needs to be). On the second query,2157 * it (ret_data_len) is set to number of snapshots so we can2158 * know to set the maximum response size larger (see below).2159 */2160 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))2161 return -EFAULT;2162 2163 /*2164 * Note that for snapshot queries that servers like Azure expect that2165 * the first query be minimal size (and just used to get the number/size2166 * of previous versions) so response size must be specified as EXACTLY2167 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple2168 * of eight bytes.2169 */2170 if (ret_data_len == 0)2171 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;2172 else2173 max_response_size = CIFSMaxBufSize;2174 2175 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,2176 cfile->fid.volatile_fid,2177 FSCTL_SRV_ENUMERATE_SNAPSHOTS,2178 NULL, 0 /* no input data */, max_response_size,2179 (char **)&retbuf,2180 &ret_data_len);2181 cifs_dbg(FYI, "enum snapshots ioctl returned %d and ret buflen is %d\n",2182 rc, ret_data_len);2183 if (rc)2184 return rc;2185 2186 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {2187 /* Fixup buffer */2188 if (copy_from_user(&snapshot_in, ioc_buf,2189 sizeof(struct smb_snapshot_array))) {2190 rc = -EFAULT;2191 kfree(retbuf);2192 return rc;2193 }2194 2195 /*2196 * Check for min size, ie not large enough to fit even one GMT2197 * token (snapshot). On the first ioctl some users may pass in2198 * smaller size (or zero) to simply get the size of the array2199 * so the user space caller can allocate sufficient memory2200 * and retry the ioctl again with larger array size sufficient2201 * to hold all of the snapshot GMT tokens on the second try.2202 */2203 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)2204 ret_data_len = sizeof(struct smb_snapshot_array);2205 2206 /*2207 * We return struct SRV_SNAPSHOT_ARRAY, followed by2208 * the snapshot array (of 50 byte GMT tokens) each2209 * representing an available previous version of the data2210 */2211 if (ret_data_len > (snapshot_in.snapshot_array_size +2212 sizeof(struct smb_snapshot_array)))2213 ret_data_len = snapshot_in.snapshot_array_size +2214 sizeof(struct smb_snapshot_array);2215 2216 if (copy_to_user(ioc_buf, retbuf, ret_data_len))2217 rc = -EFAULT;2218 }2219 2220 kfree(retbuf);2221 return rc;2222}2223 2224 2225 2226static int2227smb3_notify(const unsigned int xid, struct file *pfile,2228 void __user *ioc_buf, bool return_changes)2229{2230 struct smb3_notify_info notify;2231 struct smb3_notify_info __user *pnotify_buf;2232 struct dentry *dentry = pfile->f_path.dentry;2233 struct inode *inode = file_inode(pfile);2234 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);2235 struct cifs_open_parms oparms;2236 struct cifs_fid fid;2237 struct cifs_tcon *tcon;2238 const unsigned char *path;2239 char *returned_ioctl_info = NULL;2240 void *page = alloc_dentry_path();2241 __le16 *utf16_path = NULL;2242 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;2243 int rc = 0;2244 __u32 ret_len = 0;2245 2246 path = build_path_from_dentry(dentry, page);2247 if (IS_ERR(path)) {2248 rc = PTR_ERR(path);2249 goto notify_exit;2250 }2251 2252 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);2253 if (utf16_path == NULL) {2254 rc = -ENOMEM;2255 goto notify_exit;2256 }2257 2258 if (return_changes) {2259 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) {2260 rc = -EFAULT;2261 goto notify_exit;2262 }2263 } else {2264 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) {2265 rc = -EFAULT;2266 goto notify_exit;2267 }2268 notify.data_len = 0;2269 }2270 2271 tcon = cifs_sb_master_tcon(cifs_sb);2272 oparms = (struct cifs_open_parms) {2273 .tcon = tcon,2274 .path = path,2275 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,2276 .disposition = FILE_OPEN,2277 .create_options = cifs_create_options(cifs_sb, 0),2278 .fid = &fid,2279 };2280 2281 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,2282 NULL);2283 if (rc)2284 goto notify_exit;2285 2286 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,2287 notify.watch_tree, notify.completion_filter,2288 notify.data_len, &returned_ioctl_info, &ret_len);2289 2290 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);2291 2292 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);2293 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {2294 if (ret_len > notify.data_len)2295 ret_len = notify.data_len;2296 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;2297 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))2298 rc = -EFAULT;2299 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))2300 rc = -EFAULT;2301 }2302 kfree(returned_ioctl_info);2303notify_exit:2304 free_dentry_path(page);2305 kfree(utf16_path);2306 return rc;2307}2308 2309static int2310smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,2311 const char *path, struct cifs_sb_info *cifs_sb,2312 struct cifs_fid *fid, __u16 search_flags,2313 struct cifs_search_info *srch_inf)2314{2315 __le16 *utf16_path;2316 struct smb_rqst rqst[2];2317 struct kvec rsp_iov[2];2318 int resp_buftype[2];2319 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];2320 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];2321 int rc, flags = 0;2322 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;2323 struct cifs_open_parms oparms;2324 struct smb2_query_directory_rsp *qd_rsp = NULL;2325 struct smb2_create_rsp *op_rsp = NULL;2326 struct TCP_Server_Info *server;2327 int retries = 0, cur_sleep = 1;2328 2329replay_again:2330 /* reinitialize for possible replay */2331 flags = 0;2332 oplock = SMB2_OPLOCK_LEVEL_NONE;2333 server = cifs_pick_channel(tcon->ses);2334 2335 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);2336 if (!utf16_path)2337 return -ENOMEM;2338 2339 if (smb3_encryption_required(tcon))2340 flags |= CIFS_TRANSFORM_REQ;2341 2342 memset(rqst, 0, sizeof(rqst));2343 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;2344 memset(rsp_iov, 0, sizeof(rsp_iov));2345 2346 /* Open */2347 memset(&open_iov, 0, sizeof(open_iov));2348 rqst[0].rq_iov = open_iov;2349 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;2350 2351 oparms = (struct cifs_open_parms) {2352 .tcon = tcon,2353 .path = path,2354 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,2355 .disposition = FILE_OPEN,2356 .create_options = cifs_create_options(cifs_sb, 0),2357 .fid = fid,2358 .replay = !!(retries),2359 };2360 2361 rc = SMB2_open_init(tcon, server,2362 &rqst[0], &oplock, &oparms, utf16_path);2363 if (rc)2364 goto qdf_free;2365 smb2_set_next_command(tcon, &rqst[0]);2366 2367 /* Query directory */2368 srch_inf->entries_in_buffer = 0;2369 srch_inf->index_of_last_entry = 2;2370 2371 memset(&qd_iov, 0, sizeof(qd_iov));2372 rqst[1].rq_iov = qd_iov;2373 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;2374 2375 rc = SMB2_query_directory_init(xid, tcon, server,2376 &rqst[1],2377 COMPOUND_FID, COMPOUND_FID,2378 0, srch_inf->info_level);2379 if (rc)2380 goto qdf_free;2381 2382 smb2_set_related(&rqst[1]);2383 2384 if (retries) {2385 smb2_set_replay(server, &rqst[0]);2386 smb2_set_replay(server, &rqst[1]);2387 }2388 2389 rc = compound_send_recv(xid, tcon->ses, server,2390 flags, 2, rqst,2391 resp_buftype, rsp_iov);2392 2393 /* If the open failed there is nothing to do */2394 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;2395 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {2396 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);2397 goto qdf_free;2398 }2399 fid->persistent_fid = op_rsp->PersistentFileId;2400 fid->volatile_fid = op_rsp->VolatileFileId;2401 2402 /* Anything else than ENODATA means a genuine error */2403 if (rc && rc != -ENODATA) {2404 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);2405 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);2406 trace_smb3_query_dir_err(xid, fid->persistent_fid,2407 tcon->tid, tcon->ses->Suid, 0, 0, rc);2408 goto qdf_free;2409 }2410 2411 atomic_inc(&tcon->num_remote_opens);2412 2413 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;2414 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {2415 trace_smb3_query_dir_done(xid, fid->persistent_fid,2416 tcon->tid, tcon->ses->Suid, 0, 0);2417 srch_inf->endOfSearch = true;2418 rc = 0;2419 goto qdf_free;2420 }2421 2422 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],2423 srch_inf);2424 if (rc) {2425 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,2426 tcon->ses->Suid, 0, 0, rc);2427 goto qdf_free;2428 }2429 resp_buftype[1] = CIFS_NO_BUFFER;2430 2431 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,2432 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);2433 2434 qdf_free:2435 kfree(utf16_path);2436 SMB2_open_free(&rqst[0]);2437 SMB2_query_directory_free(&rqst[1]);2438 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);2439 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);2440 2441 if (is_replayable_error(rc) &&2442 smb2_should_replay(tcon, &retries, &cur_sleep))2443 goto replay_again;2444 2445 return rc;2446}2447 2448static int2449smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,2450 struct cifs_fid *fid, __u16 search_flags,2451 struct cifs_search_info *srch_inf)2452{2453 return SMB2_query_directory(xid, tcon, fid->persistent_fid,2454 fid->volatile_fid, 0, srch_inf);2455}2456 2457static int2458smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,2459 struct cifs_fid *fid)2460{2461 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);2462}2463 2464/*2465 * If we negotiate SMB2 protocol and get STATUS_PENDING - update2466 * the number of credits and return true. Otherwise - return false.2467 */2468static bool2469smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)2470{2471 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;2472 int scredits, in_flight;2473 2474 if (shdr->Status != STATUS_PENDING)2475 return false;2476 2477 if (shdr->CreditRequest) {2478 spin_lock(&server->req_lock);2479 server->credits += le16_to_cpu(shdr->CreditRequest);2480 scredits = server->credits;2481 in_flight = server->in_flight;2482 spin_unlock(&server->req_lock);2483 wake_up(&server->request_q);2484 2485 trace_smb3_pend_credits(server->CurrentMid,2486 server->conn_id, server->hostname, scredits,2487 le16_to_cpu(shdr->CreditRequest), in_flight);2488 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",2489 __func__, le16_to_cpu(shdr->CreditRequest), scredits);2490 }2491 2492 return true;2493}2494 2495static bool2496smb2_is_session_expired(char *buf)2497{2498 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;2499 2500 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&2501 shdr->Status != STATUS_USER_SESSION_DELETED)2502 return false;2503 2504 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),2505 le64_to_cpu(shdr->SessionId),2506 le16_to_cpu(shdr->Command),2507 le64_to_cpu(shdr->MessageId));2508 cifs_dbg(FYI, "Session expired or deleted\n");2509 2510 return true;2511}2512 2513static bool2514smb2_is_status_io_timeout(char *buf)2515{2516 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;2517 2518 if (shdr->Status == STATUS_IO_TIMEOUT)2519 return true;2520 else2521 return false;2522}2523 2524static bool2525smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)2526{2527 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;2528 struct TCP_Server_Info *pserver;2529 struct cifs_ses *ses;2530 struct cifs_tcon *tcon;2531 2532 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)2533 return false;2534 2535 /* If server is a channel, select the primary channel */2536 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;2537 2538 spin_lock(&cifs_tcp_ses_lock);2539 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {2540 if (cifs_ses_exiting(ses))2541 continue;2542 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {2543 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {2544 spin_lock(&tcon->tc_lock);2545 tcon->need_reconnect = true;2546 spin_unlock(&tcon->tc_lock);2547 spin_unlock(&cifs_tcp_ses_lock);2548 pr_warn_once("Server share %s deleted.\n",2549 tcon->tree_name);2550 return true;2551 }2552 }2553 }2554 spin_unlock(&cifs_tcp_ses_lock);2555 2556 return false;2557}2558 2559static int2560smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,2561 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)2562{2563 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)2564 return SMB2_lease_break(0, tcon, cinode->lease_key,2565 smb2_get_lease_state(cinode));2566 2567 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,2568 CIFS_CACHE_READ(cinode) ? 1 : 0);2569}2570 2571void2572smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst)2573{2574 struct smb2_hdr *shdr;2575 2576 if (server->dialect < SMB30_PROT_ID)2577 return;2578 2579 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);2580 if (shdr == NULL) {2581 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");2582 return;2583 }2584 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION;2585}2586 2587void2588smb2_set_related(struct smb_rqst *rqst)2589{2590 struct smb2_hdr *shdr;2591 2592 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);2593 if (shdr == NULL) {2594 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");2595 return;2596 }2597 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;2598}2599 2600char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};2601 2602void2603smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)2604{2605 struct smb2_hdr *shdr;2606 struct cifs_ses *ses = tcon->ses;2607 struct TCP_Server_Info *server = ses->server;2608 unsigned long len = smb_rqst_len(server, rqst);2609 int i, num_padding;2610 2611 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);2612 if (shdr == NULL) {2613 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");2614 return;2615 }2616 2617 /* SMB headers in a compound are 8 byte aligned. */2618 2619 /* No padding needed */2620 if (!(len & 7))2621 goto finished;2622 2623 num_padding = 8 - (len & 7);2624 if (!smb3_encryption_required(tcon)) {2625 /*2626 * If we do not have encryption then we can just add an extra2627 * iov for the padding.2628 */2629 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;2630 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;2631 rqst->rq_nvec++;2632 len += num_padding;2633 } else {2634 /*2635 * We can not add a small padding iov for the encryption case2636 * because the encryption framework can not handle the padding2637 * iovs.2638 * We have to flatten this into a single buffer and add2639 * the padding to it.2640 */2641 for (i = 1; i < rqst->rq_nvec; i++) {2642 memcpy(rqst->rq_iov[0].iov_base +2643 rqst->rq_iov[0].iov_len,2644 rqst->rq_iov[i].iov_base,2645 rqst->rq_iov[i].iov_len);2646 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;2647 }2648 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,2649 0, num_padding);2650 rqst->rq_iov[0].iov_len += num_padding;2651 len += num_padding;2652 rqst->rq_nvec = 1;2653 }2654 2655 finished:2656 shdr->NextCommand = cpu_to_le32(len);2657}2658 2659/*2660 * helper function for exponential backoff and check if replayable2661 */2662bool smb2_should_replay(struct cifs_tcon *tcon,2663 int *pretries,2664 int *pcur_sleep)2665{2666 if (!pretries || !pcur_sleep)2667 return false;2668 2669 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) {2670 msleep(*pcur_sleep);2671 (*pcur_sleep) = ((*pcur_sleep) << 1);2672 if ((*pcur_sleep) > CIFS_MAX_SLEEP)2673 (*pcur_sleep) = CIFS_MAX_SLEEP;2674 return true;2675 }2676 2677 return false;2678}2679 2680/*2681 * Passes the query info response back to the caller on success.2682 * Caller need to free this with free_rsp_buf().2683 */2684int2685smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,2686 const char *path, u32 desired_access,2687 u32 class, u32 type, u32 output_len,2688 struct kvec *rsp, int *buftype,2689 struct cifs_sb_info *cifs_sb)2690{2691 struct smb2_compound_vars *vars;2692 struct cifs_ses *ses = tcon->ses;2693 struct TCP_Server_Info *server;2694 int flags = CIFS_CP_CREATE_CLOSE_OP;2695 struct smb_rqst *rqst;2696 int resp_buftype[3];2697 struct kvec *rsp_iov;2698 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;2699 struct cifs_open_parms oparms;2700 struct cifs_fid fid;2701 int rc;2702 __le16 *utf16_path;2703 struct cached_fid *cfid = NULL;2704 int retries = 0, cur_sleep = 1;2705 2706replay_again:2707 /* reinitialize for possible replay */2708 flags = CIFS_CP_CREATE_CLOSE_OP;2709 oplock = SMB2_OPLOCK_LEVEL_NONE;2710 server = cifs_pick_channel(ses);2711 2712 if (!path)2713 path = "";2714 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);2715 if (!utf16_path)2716 return -ENOMEM;2717 2718 if (smb3_encryption_required(tcon))2719 flags |= CIFS_TRANSFORM_REQ;2720 2721 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;2722 vars = kzalloc(sizeof(*vars), GFP_KERNEL);2723 if (!vars) {2724 rc = -ENOMEM;2725 goto out_free_path;2726 }2727 rqst = vars->rqst;2728 rsp_iov = vars->rsp_iov;2729 2730 /*2731 * We can only call this for things we know are directories.2732 */2733 if (!strcmp(path, ""))2734 open_cached_dir(xid, tcon, path, cifs_sb, false,2735 &cfid); /* cfid null if open dir failed */2736 2737 rqst[0].rq_iov = vars->open_iov;2738 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;2739 2740 oparms = (struct cifs_open_parms) {2741 .tcon = tcon,2742 .path = path,2743 .desired_access = desired_access,2744 .disposition = FILE_OPEN,2745 .create_options = cifs_create_options(cifs_sb, 0),2746 .fid = &fid,2747 .replay = !!(retries),2748 };2749 2750 rc = SMB2_open_init(tcon, server,2751 &rqst[0], &oplock, &oparms, utf16_path);2752 if (rc)2753 goto qic_exit;2754 smb2_set_next_command(tcon, &rqst[0]);2755 2756 rqst[1].rq_iov = &vars->qi_iov;2757 rqst[1].rq_nvec = 1;2758 2759 if (cfid) {2760 rc = SMB2_query_info_init(tcon, server,2761 &rqst[1],2762 cfid->fid.persistent_fid,2763 cfid->fid.volatile_fid,2764 class, type, 0,2765 output_len, 0,2766 NULL);2767 } else {2768 rc = SMB2_query_info_init(tcon, server,2769 &rqst[1],2770 COMPOUND_FID,2771 COMPOUND_FID,2772 class, type, 0,2773 output_len, 0,2774 NULL);2775 }2776 if (rc)2777 goto qic_exit;2778 if (!cfid) {2779 smb2_set_next_command(tcon, &rqst[1]);2780 smb2_set_related(&rqst[1]);2781 }2782 2783 rqst[2].rq_iov = &vars->close_iov;2784 rqst[2].rq_nvec = 1;2785 2786 rc = SMB2_close_init(tcon, server,2787 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);2788 if (rc)2789 goto qic_exit;2790 smb2_set_related(&rqst[2]);2791 2792 if (retries) {2793 if (!cfid) {2794 smb2_set_replay(server, &rqst[0]);2795 smb2_set_replay(server, &rqst[2]);2796 }2797 smb2_set_replay(server, &rqst[1]);2798 }2799 2800 if (cfid) {2801 rc = compound_send_recv(xid, ses, server,2802 flags, 1, &rqst[1],2803 &resp_buftype[1], &rsp_iov[1]);2804 } else {2805 rc = compound_send_recv(xid, ses, server,2806 flags, 3, rqst,2807 resp_buftype, rsp_iov);2808 }2809 if (rc) {2810 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);2811 if (rc == -EREMCHG) {2812 tcon->need_reconnect = true;2813 pr_warn_once("server share %s deleted\n",2814 tcon->tree_name);2815 }2816 goto qic_exit;2817 }2818 *rsp = rsp_iov[1];2819 *buftype = resp_buftype[1];2820 2821 qic_exit:2822 SMB2_open_free(&rqst[0]);2823 SMB2_query_info_free(&rqst[1]);2824 SMB2_close_free(&rqst[2]);2825 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);2826 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);2827 if (cfid)2828 close_cached_dir(cfid);2829 kfree(vars);2830out_free_path:2831 kfree(utf16_path);2832 2833 if (is_replayable_error(rc) &&2834 smb2_should_replay(tcon, &retries, &cur_sleep))2835 goto replay_again;2836 2837 return rc;2838}2839 2840static int2841smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,2842 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf)2843{2844 struct smb2_query_info_rsp *rsp;2845 struct smb2_fs_full_size_info *info = NULL;2846 struct kvec rsp_iov = {NULL, 0};2847 int buftype = CIFS_NO_BUFFER;2848 int rc;2849 2850 2851 rc = smb2_query_info_compound(xid, tcon, path,2852 FILE_READ_ATTRIBUTES,2853 FS_FULL_SIZE_INFORMATION,2854 SMB2_O_INFO_FILESYSTEM,2855 sizeof(struct smb2_fs_full_size_info),2856 &rsp_iov, &buftype, cifs_sb);2857 if (rc)2858 goto qfs_exit;2859 2860 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;2861 buf->f_type = SMB2_SUPER_MAGIC;2862 info = (struct smb2_fs_full_size_info *)(2863 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);2864 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),2865 le32_to_cpu(rsp->OutputBufferLength),2866 &rsp_iov,2867 sizeof(struct smb2_fs_full_size_info));2868 if (!rc)2869 smb2_copy_fs_info_to_kstatfs(info, buf);2870 2871qfs_exit:2872 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);2873 free_rsp_buf(buftype, rsp_iov.iov_base);2874 return rc;2875}2876 2877static int2878smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,2879 const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf)2880{2881 int rc;2882 __le16 *utf16_path = NULL;2883 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;2884 struct cifs_open_parms oparms;2885 struct cifs_fid fid;2886 2887 if (!tcon->posix_extensions)2888 return smb2_queryfs(xid, tcon, path, cifs_sb, buf);2889 2890 oparms = (struct cifs_open_parms) {2891 .tcon = tcon,2892 .path = path,2893 .desired_access = FILE_READ_ATTRIBUTES,2894 .disposition = FILE_OPEN,2895 .create_options = cifs_create_options(cifs_sb, 0),2896 .fid = &fid,2897 };2898 2899 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);2900 if (utf16_path == NULL)2901 return -ENOMEM;2902 2903 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,2904 NULL, NULL);2905 kfree(utf16_path);2906 if (rc)2907 return rc;2908 2909 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,2910 fid.volatile_fid, buf);2911 buf->f_type = SMB2_SUPER_MAGIC;2912 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);2913 return rc;2914}2915 2916static bool2917smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)2918{2919 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&2920 ob1->fid.volatile_fid == ob2->fid.volatile_fid;2921}2922 2923static int2924smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,2925 __u64 length, __u32 type, int lock, int unlock, bool wait)2926{2927 if (unlock && !lock)2928 type = SMB2_LOCKFLAG_UNLOCK;2929 return SMB2_lock(xid, tlink_tcon(cfile->tlink),2930 cfile->fid.persistent_fid, cfile->fid.volatile_fid,2931 current->tgid, length, offset, type, wait);2932}2933 2934static void2935smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)2936{2937 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);2938}2939 2940static void2941smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)2942{2943 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);2944}2945 2946static void2947smb2_new_lease_key(struct cifs_fid *fid)2948{2949 generate_random_uuid(fid->lease_key);2950}2951 2952static int2953smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,2954 const char *search_name,2955 struct dfs_info3_param **target_nodes,2956 unsigned int *num_of_nodes,2957 const struct nls_table *nls_codepage, int remap)2958{2959 int rc;2960 __le16 *utf16_path = NULL;2961 int utf16_path_len = 0;2962 struct cifs_tcon *tcon;2963 struct fsctl_get_dfs_referral_req *dfs_req = NULL;2964 struct get_dfs_referral_rsp *dfs_rsp = NULL;2965 u32 dfs_req_size = 0, dfs_rsp_size = 0;2966 int retry_count = 0;2967 2968 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);2969 2970 /*2971 * Try to use the IPC tcon, otherwise just use any2972 */2973 tcon = ses->tcon_ipc;2974 if (tcon == NULL) {2975 spin_lock(&cifs_tcp_ses_lock);2976 tcon = list_first_entry_or_null(&ses->tcon_list,2977 struct cifs_tcon,2978 tcon_list);2979 if (tcon) {2980 tcon->tc_count++;2981 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,2982 netfs_trace_tcon_ref_get_dfs_refer);2983 }2984 spin_unlock(&cifs_tcp_ses_lock);2985 }2986 2987 if (tcon == NULL) {2988 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",2989 ses);2990 rc = -ENOTCONN;2991 goto out;2992 }2993 2994 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,2995 &utf16_path_len,2996 nls_codepage, remap);2997 if (!utf16_path) {2998 rc = -ENOMEM;2999 goto out;3000 }3001 3002 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;3003 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);3004 if (!dfs_req) {3005 rc = -ENOMEM;3006 goto out;3007 }3008 3009 /* Highest DFS referral version understood */3010 dfs_req->MaxReferralLevel = DFS_VERSION;3011 3012 /* Path to resolve in an UTF-16 null-terminated string */3013 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);3014 3015 do {3016 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,3017 FSCTL_DFS_GET_REFERRALS,3018 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,3019 (char **)&dfs_rsp, &dfs_rsp_size);3020 if (!is_retryable_error(rc))3021 break;3022 usleep_range(512, 2048);3023 } while (++retry_count < 5);3024 3025 if (!rc && !dfs_rsp)3026 rc = -EIO;3027 if (rc) {3028 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)3029 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);3030 goto out;3031 }3032 3033 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,3034 num_of_nodes, target_nodes,3035 nls_codepage, remap, search_name,3036 true /* is_unicode */);3037 if (rc) {3038 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);3039 goto out;3040 }3041 3042 out:3043 if (tcon && !tcon->ipc) {3044 /* ipc tcons are not refcounted */3045 spin_lock(&cifs_tcp_ses_lock);3046 tcon->tc_count--;3047 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,3048 netfs_trace_tcon_ref_dec_dfs_refer);3049 /* tc_count can never go negative */3050 WARN_ON(tcon->tc_count < 0);3051 spin_unlock(&cifs_tcp_ses_lock);3052 }3053 kfree(utf16_path);3054 kfree(dfs_req);3055 kfree(dfs_rsp);3056 return rc;3057}3058 3059static struct smb_ntsd *3060get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,3061 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)3062{3063 struct smb_ntsd *pntsd = NULL;3064 unsigned int xid;3065 int rc = -EOPNOTSUPP;3066 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);3067 3068 if (IS_ERR(tlink))3069 return ERR_CAST(tlink);3070 3071 xid = get_xid();3072 cifs_dbg(FYI, "trying to get acl\n");3073 3074 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,3075 cifsfid->volatile_fid, (void **)&pntsd, pacllen,3076 info);3077 free_xid(xid);3078 3079 cifs_put_tlink(tlink);3080 3081 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);3082 if (rc)3083 return ERR_PTR(rc);3084 return pntsd;3085 3086}3087 3088static struct smb_ntsd *3089get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,3090 const char *path, u32 *pacllen, u32 info)3091{3092 struct smb_ntsd *pntsd = NULL;3093 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;3094 unsigned int xid;3095 int rc;3096 struct cifs_tcon *tcon;3097 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);3098 struct cifs_fid fid;3099 struct cifs_open_parms oparms;3100 __le16 *utf16_path;3101 3102 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);3103 if (IS_ERR(tlink))3104 return ERR_CAST(tlink);3105 3106 tcon = tlink_tcon(tlink);3107 xid = get_xid();3108 3109 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);3110 if (!utf16_path) {3111 rc = -ENOMEM;3112 free_xid(xid);3113 return ERR_PTR(rc);3114 }3115 3116 oparms = (struct cifs_open_parms) {3117 .tcon = tcon,3118 .path = path,3119 .desired_access = READ_CONTROL,3120 .disposition = FILE_OPEN,3121 /*3122 * When querying an ACL, even if the file is a symlink3123 * we want to open the source not the target, and so3124 * the protocol requires that the client specify this3125 * flag when opening a reparse point3126 */3127 .create_options = cifs_create_options(cifs_sb, 0) |3128 OPEN_REPARSE_POINT,3129 .fid = &fid,3130 };3131 3132 if (info & SACL_SECINFO)3133 oparms.desired_access |= SYSTEM_SECURITY;3134 3135 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,3136 NULL);3137 kfree(utf16_path);3138 if (!rc) {3139 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,3140 fid.volatile_fid, (void **)&pntsd, pacllen,3141 info);3142 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);3143 }3144 3145 cifs_put_tlink(tlink);3146 free_xid(xid);3147 3148 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);3149 if (rc)3150 return ERR_PTR(rc);3151 return pntsd;3152}3153 3154static int3155set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen,3156 struct inode *inode, const char *path, int aclflag)3157{3158 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;3159 unsigned int xid;3160 int rc, access_flags = 0;3161 struct cifs_tcon *tcon;3162 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);3163 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);3164 struct cifs_fid fid;3165 struct cifs_open_parms oparms;3166 __le16 *utf16_path;3167 3168 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);3169 if (IS_ERR(tlink))3170 return PTR_ERR(tlink);3171 3172 tcon = tlink_tcon(tlink);3173 xid = get_xid();3174 3175 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)3176 access_flags |= WRITE_OWNER;3177 if (aclflag & CIFS_ACL_SACL)3178 access_flags |= SYSTEM_SECURITY;3179 if (aclflag & CIFS_ACL_DACL)3180 access_flags |= WRITE_DAC;3181 3182 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);3183 if (!utf16_path) {3184 rc = -ENOMEM;3185 free_xid(xid);3186 return rc;3187 }3188 3189 oparms = (struct cifs_open_parms) {3190 .tcon = tcon,3191 .desired_access = access_flags,3192 .create_options = cifs_create_options(cifs_sb, 0),3193 .disposition = FILE_OPEN,3194 .path = path,3195 .fid = &fid,3196 };3197 3198 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,3199 NULL, NULL);3200 kfree(utf16_path);3201 if (!rc) {3202 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,3203 fid.volatile_fid, pnntsd, acllen, aclflag);3204 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);3205 }3206 3207 cifs_put_tlink(tlink);3208 free_xid(xid);3209 return rc;3210}3211 3212/* Retrieve an ACL from the server */3213static struct smb_ntsd *3214get_smb2_acl(struct cifs_sb_info *cifs_sb,3215 struct inode *inode, const char *path,3216 u32 *pacllen, u32 info)3217{3218 struct smb_ntsd *pntsd = NULL;3219 struct cifsFileInfo *open_file = NULL;3220 3221 if (inode && !(info & SACL_SECINFO))3222 open_file = find_readable_file(CIFS_I(inode), true);3223 if (!open_file || (info & SACL_SECINFO))3224 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);3225 3226 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);3227 cifsFileInfo_put(open_file);3228 return pntsd;3229}3230 3231static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,3232 loff_t offset, loff_t len, unsigned int xid)3233{3234 struct cifsFileInfo *cfile = file->private_data;3235 struct file_zero_data_information fsctl_buf;3236 3237 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);3238 3239 fsctl_buf.FileOffset = cpu_to_le64(offset);3240 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);3241 3242 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,3243 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,3244 (char *)&fsctl_buf,3245 sizeof(struct file_zero_data_information),3246 0, NULL, NULL);3247}3248 3249static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,3250 unsigned long long offset, unsigned long long len,3251 bool keep_size)3252{3253 struct cifs_ses *ses = tcon->ses;3254 struct inode *inode = file_inode(file);3255 struct cifsInodeInfo *cifsi = CIFS_I(inode);3256 struct cifsFileInfo *cfile = file->private_data;3257 struct netfs_inode *ictx = netfs_inode(inode);3258 unsigned long long i_size, new_size, remote_size;3259 long rc;3260 unsigned int xid;3261 3262 xid = get_xid();3263 3264 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,3265 ses->Suid, offset, len);3266 3267 inode_lock(inode);3268 filemap_invalidate_lock(inode->i_mapping);3269 3270 i_size = i_size_read(inode);3271 remote_size = ictx->remote_i_size;3272 if (offset + len >= remote_size && offset < i_size) {3273 unsigned long long top = umin(offset + len, i_size);3274 3275 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1);3276 if (rc < 0)3277 goto zero_range_exit;3278 }3279 3280 /*3281 * We zero the range through ioctl, so we need remove the page caches3282 * first, otherwise the data may be inconsistent with the server.3283 */3284 truncate_pagecache_range(inode, offset, offset + len - 1);3285 3286 /* if file not oplocked can't be sure whether asking to extend size */3287 rc = -EOPNOTSUPP;3288 if (keep_size == false && !CIFS_CACHE_READ(cifsi))3289 goto zero_range_exit;3290 3291 rc = smb3_zero_data(file, tcon, offset, len, xid);3292 if (rc < 0)3293 goto zero_range_exit;3294 3295 /*3296 * do we also need to change the size of the file?3297 */3298 new_size = offset + len;3299 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {3300 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,3301 cfile->fid.volatile_fid, cfile->pid, new_size);3302 if (rc >= 0) {3303 truncate_setsize(inode, new_size);3304 netfs_resize_file(&cifsi->netfs, new_size, true);3305 if (offset < cifsi->netfs.zero_point)3306 cifsi->netfs.zero_point = offset;3307 fscache_resize_cookie(cifs_inode_cookie(inode), new_size);3308 }3309 }3310 3311 zero_range_exit:3312 filemap_invalidate_unlock(inode->i_mapping);3313 inode_unlock(inode);3314 free_xid(xid);3315 if (rc)3316 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,3317 ses->Suid, offset, len, rc);3318 else3319 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,3320 ses->Suid, offset, len);3321 return rc;3322}3323 3324static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,3325 loff_t offset, loff_t len)3326{3327 struct inode *inode = file_inode(file);3328 struct cifsFileInfo *cfile = file->private_data;3329 struct file_zero_data_information fsctl_buf;3330 unsigned long long end = offset + len, i_size, remote_i_size;3331 long rc;3332 unsigned int xid;3333 __u8 set_sparse = 1;3334 3335 xid = get_xid();3336 3337 inode_lock(inode);3338 /* Need to make file sparse, if not already, before freeing range. */3339 /* Consider adding equivalent for compressed since it could also work */3340 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {3341 rc = -EOPNOTSUPP;3342 goto out;3343 }3344 3345 filemap_invalidate_lock(inode->i_mapping);3346 /*3347 * We implement the punch hole through ioctl, so we need remove the page3348 * caches first, otherwise the data may be inconsistent with the server.3349 */3350 truncate_pagecache_range(inode, offset, offset + len - 1);3351 3352 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);3353 3354 fsctl_buf.FileOffset = cpu_to_le64(offset);3355 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);3356 3357 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,3358 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,3359 (char *)&fsctl_buf,3360 sizeof(struct file_zero_data_information),3361 CIFSMaxBufSize, NULL, NULL);3362 3363 if (rc)3364 goto unlock;3365 3366 /* If there's dirty data in the buffer that would extend the EOF if it3367 * were written, then we need to move the EOF marker over to the lower3368 * of the high end of the hole and the proposed EOF. The problem is3369 * that we locally hole-punch the tail of the dirty data, the proposed3370 * EOF update will end up in the wrong place.3371 */3372 i_size = i_size_read(inode);3373 remote_i_size = netfs_inode(inode)->remote_i_size;3374 if (end > remote_i_size && i_size > remote_i_size) {3375 unsigned long long extend_to = umin(end, i_size);3376 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,3377 cfile->fid.volatile_fid, cfile->pid, extend_to);3378 if (rc >= 0)3379 netfs_inode(inode)->remote_i_size = extend_to;3380 }3381 3382unlock:3383 filemap_invalidate_unlock(inode->i_mapping);3384out:3385 inode_unlock(inode);3386 free_xid(xid);3387 return rc;3388}3389 3390static int smb3_simple_fallocate_write_range(unsigned int xid,3391 struct cifs_tcon *tcon,3392 struct cifsFileInfo *cfile,3393 loff_t off, loff_t len,3394 char *buf)3395{3396 struct cifs_io_parms io_parms = {0};3397 int nbytes;3398 int rc = 0;3399 struct kvec iov[2];3400 3401 io_parms.netfid = cfile->fid.netfid;3402 io_parms.pid = current->tgid;3403 io_parms.tcon = tcon;3404 io_parms.persistent_fid = cfile->fid.persistent_fid;3405 io_parms.volatile_fid = cfile->fid.volatile_fid;3406 3407 while (len) {3408 io_parms.offset = off;3409 io_parms.length = len;3410 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)3411 io_parms.length = SMB2_MAX_BUFFER_SIZE;3412 /* iov[0] is reserved for smb header */3413 iov[1].iov_base = buf;3414 iov[1].iov_len = io_parms.length;3415 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);3416 if (rc)3417 break;3418 if (nbytes > len)3419 return -EINVAL;3420 buf += nbytes;3421 off += nbytes;3422 len -= nbytes;3423 }3424 return rc;3425}3426 3427static int smb3_simple_fallocate_range(unsigned int xid,3428 struct cifs_tcon *tcon,3429 struct cifsFileInfo *cfile,3430 loff_t off, loff_t len)3431{3432 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;3433 u32 out_data_len;3434 char *buf = NULL;3435 loff_t l;3436 int rc;3437 3438 in_data.file_offset = cpu_to_le64(off);3439 in_data.length = cpu_to_le64(len);3440 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,3441 cfile->fid.volatile_fid,3442 FSCTL_QUERY_ALLOCATED_RANGES,3443 (char *)&in_data, sizeof(in_data),3444 1024 * sizeof(struct file_allocated_range_buffer),3445 (char **)&out_data, &out_data_len);3446 if (rc)3447 goto out;3448 3449 buf = kzalloc(1024 * 1024, GFP_KERNEL);3450 if (buf == NULL) {3451 rc = -ENOMEM;3452 goto out;3453 }3454 3455 tmp_data = out_data;3456 while (len) {3457 /*3458 * The rest of the region is unmapped so write it all.3459 */3460 if (out_data_len == 0) {3461 rc = smb3_simple_fallocate_write_range(xid, tcon,3462 cfile, off, len, buf);3463 goto out;3464 }3465 3466 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {3467 rc = -EINVAL;3468 goto out;3469 }3470 3471 if (off < le64_to_cpu(tmp_data->file_offset)) {3472 /*3473 * We are at a hole. Write until the end of the region3474 * or until the next allocated data,3475 * whichever comes next.3476 */3477 l = le64_to_cpu(tmp_data->file_offset) - off;3478 if (len < l)3479 l = len;3480 rc = smb3_simple_fallocate_write_range(xid, tcon,3481 cfile, off, l, buf);3482 if (rc)3483 goto out;3484 off = off + l;3485 len = len - l;3486 if (len == 0)3487 goto out;3488 }3489 /*3490 * We are at a section of allocated data, just skip forward3491 * until the end of the data or the end of the region3492 * we are supposed to fallocate, whichever comes first.3493 */3494 l = le64_to_cpu(tmp_data->length);3495 if (len < l)3496 l = len;3497 off += l;3498 len -= l;3499 3500 tmp_data = &tmp_data[1];3501 out_data_len -= sizeof(struct file_allocated_range_buffer);3502 }3503 3504 out:3505 kfree(out_data);3506 kfree(buf);3507 return rc;3508}3509 3510 3511static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,3512 loff_t off, loff_t len, bool keep_size)3513{3514 struct inode *inode;3515 struct cifsInodeInfo *cifsi;3516 struct cifsFileInfo *cfile = file->private_data;3517 long rc = -EOPNOTSUPP;3518 unsigned int xid;3519 loff_t new_eof;3520 3521 xid = get_xid();3522 3523 inode = d_inode(cfile->dentry);3524 cifsi = CIFS_I(inode);3525 3526 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,3527 tcon->ses->Suid, off, len);3528 /* if file not oplocked can't be sure whether asking to extend size */3529 if (!CIFS_CACHE_READ(cifsi))3530 if (keep_size == false) {3531 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,3532 tcon->tid, tcon->ses->Suid, off, len, rc);3533 free_xid(xid);3534 return rc;3535 }3536 3537 /*3538 * Extending the file3539 */3540 if ((keep_size == false) && i_size_read(inode) < off + len) {3541 rc = inode_newsize_ok(inode, off + len);3542 if (rc)3543 goto out;3544 3545 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)3546 smb2_set_sparse(xid, tcon, cfile, inode, false);3547 3548 new_eof = off + len;3549 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,3550 cfile->fid.volatile_fid, cfile->pid, new_eof);3551 if (rc == 0) {3552 netfs_resize_file(&cifsi->netfs, new_eof, true);3553 cifs_setsize(inode, new_eof);3554 cifs_truncate_page(inode->i_mapping, inode->i_size);3555 truncate_setsize(inode, new_eof);3556 }3557 goto out;3558 }3559 3560 /*3561 * Files are non-sparse by default so falloc may be a no-op3562 * Must check if file sparse. If not sparse, and since we are not3563 * extending then no need to do anything since file already allocated3564 */3565 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {3566 rc = 0;3567 goto out;3568 }3569 3570 if (keep_size == true) {3571 /*3572 * We can not preallocate pages beyond the end of the file3573 * in SMB23574 */3575 if (off >= i_size_read(inode)) {3576 rc = 0;3577 goto out;3578 }3579 /*3580 * For fallocates that are partially beyond the end of file,3581 * clamp len so we only fallocate up to the end of file.3582 */3583 if (off + len > i_size_read(inode)) {3584 len = i_size_read(inode) - off;3585 }3586 }3587 3588 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {3589 /*3590 * At this point, we are trying to fallocate an internal3591 * regions of a sparse file. Since smb2 does not have a3592 * fallocate command we have two options on how to emulate this.3593 * We can either turn the entire file to become non-sparse3594 * which we only do if the fallocate is for virtually3595 * the whole file, or we can overwrite the region with zeroes3596 * using SMB2_write, which could be prohibitevly expensive3597 * if len is large.3598 */3599 /*3600 * We are only trying to fallocate a small region so3601 * just write it with zero.3602 */3603 if (len <= 1024 * 1024) {3604 rc = smb3_simple_fallocate_range(xid, tcon, cfile,3605 off, len);3606 goto out;3607 }3608 3609 /*3610 * Check if falloc starts within first few pages of file3611 * and ends within a few pages of the end of file to3612 * ensure that most of file is being forced to be3613 * fallocated now. If so then setting whole file sparse3614 * ie potentially making a few extra pages at the beginning3615 * or end of the file non-sparse via set_sparse is harmless.3616 */3617 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {3618 rc = -EOPNOTSUPP;3619 goto out;3620 }3621 }3622 3623 smb2_set_sparse(xid, tcon, cfile, inode, false);3624 rc = 0;3625 3626out:3627 if (rc)3628 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,3629 tcon->ses->Suid, off, len, rc);3630 else3631 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,3632 tcon->ses->Suid, off, len);3633 3634 free_xid(xid);3635 return rc;3636}3637 3638static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,3639 loff_t off, loff_t len)3640{3641 int rc;3642 unsigned int xid;3643 struct inode *inode = file_inode(file);3644 struct cifsInodeInfo *cifsi = CIFS_I(inode);3645 struct cifsFileInfo *cfile = file->private_data;3646 struct netfs_inode *ictx = &cifsi->netfs;3647 loff_t old_eof, new_eof;3648 3649 xid = get_xid();3650 3651 inode_lock(inode);3652 3653 old_eof = i_size_read(inode);3654 if ((off >= old_eof) ||3655 off + len >= old_eof) {3656 rc = -EINVAL;3657 goto out;3658 }3659 3660 filemap_invalidate_lock(inode->i_mapping);3661 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);3662 if (rc < 0)3663 goto out_2;3664 3665 truncate_pagecache_range(inode, off, old_eof);3666 ictx->zero_point = old_eof;3667 3668 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,3669 old_eof - off - len, off);3670 if (rc < 0)3671 goto out_2;3672 3673 new_eof = old_eof - len;3674 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,3675 cfile->fid.volatile_fid, cfile->pid, new_eof);3676 if (rc < 0)3677 goto out_2;3678 3679 rc = 0;3680 3681 truncate_setsize(inode, new_eof);3682 netfs_resize_file(&cifsi->netfs, new_eof, true);3683 ictx->zero_point = new_eof;3684 fscache_resize_cookie(cifs_inode_cookie(inode), new_eof);3685out_2:3686 filemap_invalidate_unlock(inode->i_mapping);3687 out:3688 inode_unlock(inode);3689 free_xid(xid);3690 return rc;3691}3692 3693static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,3694 loff_t off, loff_t len)3695{3696 int rc;3697 unsigned int xid;3698 struct cifsFileInfo *cfile = file->private_data;3699 struct inode *inode = file_inode(file);3700 struct cifsInodeInfo *cifsi = CIFS_I(inode);3701 __u64 count, old_eof, new_eof;3702 3703 xid = get_xid();3704 3705 inode_lock(inode);3706 3707 old_eof = i_size_read(inode);3708 if (off >= old_eof) {3709 rc = -EINVAL;3710 goto out;3711 }3712 3713 count = old_eof - off;3714 new_eof = old_eof + len;3715 3716 filemap_invalidate_lock(inode->i_mapping);3717 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1);3718 if (rc < 0)3719 goto out_2;3720 truncate_pagecache_range(inode, off, old_eof);3721 3722 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,3723 cfile->fid.volatile_fid, cfile->pid, new_eof);3724 if (rc < 0)3725 goto out_2;3726 3727 truncate_setsize(inode, new_eof);3728 netfs_resize_file(&cifsi->netfs, i_size_read(inode), true);3729 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));3730 3731 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);3732 if (rc < 0)3733 goto out_2;3734 cifsi->netfs.zero_point = new_eof;3735 3736 rc = smb3_zero_data(file, tcon, off, len, xid);3737 if (rc < 0)3738 goto out_2;3739 3740 rc = 0;3741out_2:3742 filemap_invalidate_unlock(inode->i_mapping);3743 out:3744 inode_unlock(inode);3745 free_xid(xid);3746 return rc;3747}3748 3749static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)3750{3751 struct cifsFileInfo *wrcfile, *cfile = file->private_data;3752 struct cifsInodeInfo *cifsi;3753 struct inode *inode;3754 int rc = 0;3755 struct file_allocated_range_buffer in_data, *out_data = NULL;3756 u32 out_data_len;3757 unsigned int xid;3758 3759 if (whence != SEEK_HOLE && whence != SEEK_DATA)3760 return generic_file_llseek(file, offset, whence);3761 3762 inode = d_inode(cfile->dentry);3763 cifsi = CIFS_I(inode);3764 3765 if (offset < 0 || offset >= i_size_read(inode))3766 return -ENXIO;3767 3768 xid = get_xid();3769 /*3770 * We need to be sure that all dirty pages are written as they3771 * might fill holes on the server.3772 * Note that we also MUST flush any written pages since at least3773 * some servers (Windows2016) will not reflect recent writes in3774 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.3775 */3776 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);3777 if (wrcfile) {3778 filemap_write_and_wait(inode->i_mapping);3779 smb2_flush_file(xid, tcon, &wrcfile->fid);3780 cifsFileInfo_put(wrcfile);3781 }3782 3783 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {3784 if (whence == SEEK_HOLE)3785 offset = i_size_read(inode);3786 goto lseek_exit;3787 }3788 3789 in_data.file_offset = cpu_to_le64(offset);3790 in_data.length = cpu_to_le64(i_size_read(inode));3791 3792 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,3793 cfile->fid.volatile_fid,3794 FSCTL_QUERY_ALLOCATED_RANGES,3795 (char *)&in_data, sizeof(in_data),3796 sizeof(struct file_allocated_range_buffer),3797 (char **)&out_data, &out_data_len);3798 if (rc == -E2BIG)3799 rc = 0;3800 if (rc)3801 goto lseek_exit;3802 3803 if (whence == SEEK_HOLE && out_data_len == 0)3804 goto lseek_exit;3805 3806 if (whence == SEEK_DATA && out_data_len == 0) {3807 rc = -ENXIO;3808 goto lseek_exit;3809 }3810 3811 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {3812 rc = -EINVAL;3813 goto lseek_exit;3814 }3815 if (whence == SEEK_DATA) {3816 offset = le64_to_cpu(out_data->file_offset);3817 goto lseek_exit;3818 }3819 if (offset < le64_to_cpu(out_data->file_offset))3820 goto lseek_exit;3821 3822 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);3823 3824 lseek_exit:3825 free_xid(xid);3826 kfree(out_data);3827 if (!rc)3828 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);3829 else3830 return rc;3831}3832 3833static int smb3_fiemap(struct cifs_tcon *tcon,3834 struct cifsFileInfo *cfile,3835 struct fiemap_extent_info *fei, u64 start, u64 len)3836{3837 unsigned int xid;3838 struct file_allocated_range_buffer in_data, *out_data;3839 u32 out_data_len;3840 int i, num, rc, flags, last_blob;3841 u64 next;3842 3843 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);3844 if (rc)3845 return rc;3846 3847 xid = get_xid();3848 again:3849 in_data.file_offset = cpu_to_le64(start);3850 in_data.length = cpu_to_le64(len);3851 3852 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,3853 cfile->fid.volatile_fid,3854 FSCTL_QUERY_ALLOCATED_RANGES,3855 (char *)&in_data, sizeof(in_data),3856 1024 * sizeof(struct file_allocated_range_buffer),3857 (char **)&out_data, &out_data_len);3858 if (rc == -E2BIG) {3859 last_blob = 0;3860 rc = 0;3861 } else3862 last_blob = 1;3863 if (rc)3864 goto out;3865 3866 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {3867 rc = -EINVAL;3868 goto out;3869 }3870 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {3871 rc = -EINVAL;3872 goto out;3873 }3874 3875 num = out_data_len / sizeof(struct file_allocated_range_buffer);3876 for (i = 0; i < num; i++) {3877 flags = 0;3878 if (i == num - 1 && last_blob)3879 flags |= FIEMAP_EXTENT_LAST;3880 3881 rc = fiemap_fill_next_extent(fei,3882 le64_to_cpu(out_data[i].file_offset),3883 le64_to_cpu(out_data[i].file_offset),3884 le64_to_cpu(out_data[i].length),3885 flags);3886 if (rc < 0)3887 goto out;3888 if (rc == 1) {3889 rc = 0;3890 goto out;3891 }3892 }3893 3894 if (!last_blob) {3895 next = le64_to_cpu(out_data[num - 1].file_offset) +3896 le64_to_cpu(out_data[num - 1].length);3897 len = len - (next - start);3898 start = next;3899 goto again;3900 }3901 3902 out:3903 free_xid(xid);3904 kfree(out_data);3905 return rc;3906}3907 3908static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,3909 loff_t off, loff_t len)3910{3911 /* KEEP_SIZE already checked for by do_fallocate */3912 if (mode & FALLOC_FL_PUNCH_HOLE)3913 return smb3_punch_hole(file, tcon, off, len);3914 else if (mode & FALLOC_FL_ZERO_RANGE) {3915 if (mode & FALLOC_FL_KEEP_SIZE)3916 return smb3_zero_range(file, tcon, off, len, true);3917 return smb3_zero_range(file, tcon, off, len, false);3918 } else if (mode == FALLOC_FL_KEEP_SIZE)3919 return smb3_simple_falloc(file, tcon, off, len, true);3920 else if (mode == FALLOC_FL_COLLAPSE_RANGE)3921 return smb3_collapse_range(file, tcon, off, len);3922 else if (mode == FALLOC_FL_INSERT_RANGE)3923 return smb3_insert_range(file, tcon, off, len);3924 else if (mode == 0)3925 return smb3_simple_falloc(file, tcon, off, len, false);3926 3927 return -EOPNOTSUPP;3928}3929 3930static void3931smb2_downgrade_oplock(struct TCP_Server_Info *server,3932 struct cifsInodeInfo *cinode, __u32 oplock,3933 unsigned int epoch, bool *purge_cache)3934{3935 server->ops->set_oplock_level(cinode, oplock, 0, NULL);3936}3937 3938static void3939smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,3940 unsigned int epoch, bool *purge_cache);3941 3942static void3943smb3_downgrade_oplock(struct TCP_Server_Info *server,3944 struct cifsInodeInfo *cinode, __u32 oplock,3945 unsigned int epoch, bool *purge_cache)3946{3947 unsigned int old_state = cinode->oplock;3948 unsigned int old_epoch = cinode->epoch;3949 unsigned int new_state;3950 3951 if (epoch > old_epoch) {3952 smb21_set_oplock_level(cinode, oplock, 0, NULL);3953 cinode->epoch = epoch;3954 }3955 3956 new_state = cinode->oplock;3957 *purge_cache = false;3958 3959 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&3960 (new_state & CIFS_CACHE_READ_FLG) == 0)3961 *purge_cache = true;3962 else if (old_state == new_state && (epoch - old_epoch > 1))3963 *purge_cache = true;3964}3965 3966static void3967smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,3968 unsigned int epoch, bool *purge_cache)3969{3970 oplock &= 0xFF;3971 cinode->lease_granted = false;3972 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)3973 return;3974 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {3975 cinode->oplock = CIFS_CACHE_RHW_FLG;3976 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",3977 &cinode->netfs.inode);3978 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {3979 cinode->oplock = CIFS_CACHE_RW_FLG;3980 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",3981 &cinode->netfs.inode);3982 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {3983 cinode->oplock = CIFS_CACHE_READ_FLG;3984 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",3985 &cinode->netfs.inode);3986 } else3987 cinode->oplock = 0;3988}3989 3990static void3991smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,3992 unsigned int epoch, bool *purge_cache)3993{3994 char message[5] = {0};3995 unsigned int new_oplock = 0;3996 3997 oplock &= 0xFF;3998 cinode->lease_granted = true;3999 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)4000 return;4001 4002 /* Check if the server granted an oplock rather than a lease */4003 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)4004 return smb2_set_oplock_level(cinode, oplock, epoch,4005 purge_cache);4006 4007 if (oplock & SMB2_LEASE_READ_CACHING_HE) {4008 new_oplock |= CIFS_CACHE_READ_FLG;4009 strcat(message, "R");4010 }4011 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {4012 new_oplock |= CIFS_CACHE_HANDLE_FLG;4013 strcat(message, "H");4014 }4015 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {4016 new_oplock |= CIFS_CACHE_WRITE_FLG;4017 strcat(message, "W");4018 }4019 if (!new_oplock)4020 strscpy(message, "None");4021 4022 cinode->oplock = new_oplock;4023 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,4024 &cinode->netfs.inode);4025}4026 4027static void4028smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,4029 unsigned int epoch, bool *purge_cache)4030{4031 unsigned int old_oplock = cinode->oplock;4032 4033 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);4034 4035 if (purge_cache) {4036 *purge_cache = false;4037 if (old_oplock == CIFS_CACHE_READ_FLG) {4038 if (cinode->oplock == CIFS_CACHE_READ_FLG &&4039 (epoch - cinode->epoch > 0))4040 *purge_cache = true;4041 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&4042 (epoch - cinode->epoch > 1))4043 *purge_cache = true;4044 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&4045 (epoch - cinode->epoch > 1))4046 *purge_cache = true;4047 else if (cinode->oplock == 0 &&4048 (epoch - cinode->epoch > 0))4049 *purge_cache = true;4050 } else if (old_oplock == CIFS_CACHE_RH_FLG) {4051 if (cinode->oplock == CIFS_CACHE_RH_FLG &&4052 (epoch - cinode->epoch > 0))4053 *purge_cache = true;4054 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&4055 (epoch - cinode->epoch > 1))4056 *purge_cache = true;4057 }4058 cinode->epoch = epoch;4059 }4060}4061 4062#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY4063static bool4064smb2_is_read_op(__u32 oplock)4065{4066 return oplock == SMB2_OPLOCK_LEVEL_II;4067}4068#endif /* CIFS_ALLOW_INSECURE_LEGACY */4069 4070static bool4071smb21_is_read_op(__u32 oplock)4072{4073 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&4074 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);4075}4076 4077static __le324078map_oplock_to_lease(u8 oplock)4079{4080 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)4081 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;4082 else if (oplock == SMB2_OPLOCK_LEVEL_II)4083 return SMB2_LEASE_READ_CACHING_LE;4084 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)4085 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |4086 SMB2_LEASE_WRITE_CACHING_LE;4087 return 0;4088}4089 4090static char *4091smb2_create_lease_buf(u8 *lease_key, u8 oplock)4092{4093 struct create_lease *buf;4094 4095 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);4096 if (!buf)4097 return NULL;4098 4099 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);4100 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);4101 4102 buf->ccontext.DataOffset = cpu_to_le16(offsetof4103 (struct create_lease, lcontext));4104 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));4105 buf->ccontext.NameOffset = cpu_to_le16(offsetof4106 (struct create_lease, Name));4107 buf->ccontext.NameLength = cpu_to_le16(4);4108 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */4109 buf->Name[0] = 'R';4110 buf->Name[1] = 'q';4111 buf->Name[2] = 'L';4112 buf->Name[3] = 's';4113 return (char *)buf;4114}4115 4116static char *4117smb3_create_lease_buf(u8 *lease_key, u8 oplock)4118{4119 struct create_lease_v2 *buf;4120 4121 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);4122 if (!buf)4123 return NULL;4124 4125 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);4126 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);4127 4128 buf->ccontext.DataOffset = cpu_to_le16(offsetof4129 (struct create_lease_v2, lcontext));4130 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));4131 buf->ccontext.NameOffset = cpu_to_le16(offsetof4132 (struct create_lease_v2, Name));4133 buf->ccontext.NameLength = cpu_to_le16(4);4134 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */4135 buf->Name[0] = 'R';4136 buf->Name[1] = 'q';4137 buf->Name[2] = 'L';4138 buf->Name[3] = 's';4139 return (char *)buf;4140}4141 4142static __u84143smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)4144{4145 struct create_lease *lc = (struct create_lease *)buf;4146 4147 *epoch = 0; /* not used */4148 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)4149 return SMB2_OPLOCK_LEVEL_NOCHANGE;4150 return le32_to_cpu(lc->lcontext.LeaseState);4151}4152 4153static __u84154smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)4155{4156 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;4157 4158 *epoch = le16_to_cpu(lc->lcontext.Epoch);4159 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)4160 return SMB2_OPLOCK_LEVEL_NOCHANGE;4161 if (lease_key)4162 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);4163 return le32_to_cpu(lc->lcontext.LeaseState);4164}4165 4166static unsigned int4167smb2_wp_retry_size(struct inode *inode)4168{4169 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,4170 SMB2_MAX_BUFFER_SIZE);4171}4172 4173static bool4174smb2_dir_needs_close(struct cifsFileInfo *cfile)4175{4176 return !cfile->invalidHandle;4177}4178 4179static void4180fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,4181 struct smb_rqst *old_rq, __le16 cipher_type)4182{4183 struct smb2_hdr *shdr =4184 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;4185 4186 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));4187 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;4188 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);4189 tr_hdr->Flags = cpu_to_le16(0x01);4190 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||4191 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))4192 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);4193 else4194 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);4195 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);4196}4197 4198static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,4199 int num_rqst, const u8 *sig, u8 **iv,4200 struct aead_request **req, struct sg_table *sgt,4201 unsigned int *num_sgs, size_t *sensitive_size)4202{4203 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);4204 unsigned int iv_size = crypto_aead_ivsize(tfm);4205 unsigned int len;4206 u8 *p;4207 4208 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);4209 if (IS_ERR_VALUE((long)(int)*num_sgs))4210 return ERR_PTR(*num_sgs);4211 4212 len = iv_size;4213 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);4214 len = ALIGN(len, crypto_tfm_ctx_alignment());4215 len += req_size;4216 len = ALIGN(len, __alignof__(struct scatterlist));4217 len += array_size(*num_sgs, sizeof(struct scatterlist));4218 *sensitive_size = len;4219 4220 p = kvzalloc(len, GFP_NOFS);4221 if (!p)4222 return ERR_PTR(-ENOMEM);4223 4224 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);4225 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,4226 crypto_tfm_ctx_alignment());4227 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,4228 __alignof__(struct scatterlist));4229 return p;4230}4231 4232static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,4233 int num_rqst, const u8 *sig, u8 **iv,4234 struct aead_request **req, struct scatterlist **sgl,4235 size_t *sensitive_size)4236{4237 struct sg_table sgtable = {};4238 unsigned int skip, num_sgs, i, j;4239 ssize_t rc;4240 void *p;4241 4242 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,4243 &num_sgs, sensitive_size);4244 if (IS_ERR(p))4245 return ERR_CAST(p);4246 4247 sg_init_marker(sgtable.sgl, num_sgs);4248 4249 /*4250 * The first rqst has a transform header where the4251 * first 20 bytes are not part of the encrypted blob.4252 */4253 skip = 20;4254 4255 for (i = 0; i < num_rqst; i++) {4256 struct iov_iter *iter = &rqst[i].rq_iter;4257 size_t count = iov_iter_count(iter);4258 4259 for (j = 0; j < rqst[i].rq_nvec; j++) {4260 cifs_sg_set_buf(&sgtable,4261 rqst[i].rq_iov[j].iov_base + skip,4262 rqst[i].rq_iov[j].iov_len - skip);4263 4264 /* See the above comment on the 'skip' assignment */4265 skip = 0;4266 }4267 sgtable.orig_nents = sgtable.nents;4268 4269 rc = extract_iter_to_sg(iter, count, &sgtable,4270 num_sgs - sgtable.nents, 0);4271 iov_iter_revert(iter, rc);4272 sgtable.orig_nents = sgtable.nents;4273 }4274 4275 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);4276 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);4277 *sgl = sgtable.sgl;4278 return p;4279}4280 4281static int4282smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)4283{4284 struct TCP_Server_Info *pserver;4285 struct cifs_ses *ses;4286 u8 *ses_enc_key;4287 4288 /* If server is a channel, select the primary channel */4289 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;4290 4291 spin_lock(&cifs_tcp_ses_lock);4292 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {4293 if (ses->Suid == ses_id) {4294 spin_lock(&ses->ses_lock);4295 ses_enc_key = enc ? ses->smb3encryptionkey :4296 ses->smb3decryptionkey;4297 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);4298 spin_unlock(&ses->ses_lock);4299 spin_unlock(&cifs_tcp_ses_lock);4300 return 0;4301 }4302 }4303 spin_unlock(&cifs_tcp_ses_lock);4304 4305 trace_smb3_ses_not_found(ses_id);4306 4307 return -EAGAIN;4308}4309/*4310 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:4311 * iov[0] - transform header (associate data),4312 * iov[1-N] - SMB2 header and pages - data to encrypt.4313 * On success return encrypted data in iov[1-N] and pages, leave iov[0]4314 * untouched.4315 */4316static int4317crypt_message(struct TCP_Server_Info *server, int num_rqst,4318 struct smb_rqst *rqst, int enc, struct crypto_aead *tfm)4319{4320 struct smb2_transform_hdr *tr_hdr =4321 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;4322 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;4323 int rc = 0;4324 struct scatterlist *sg;4325 u8 sign[SMB2_SIGNATURE_SIZE] = {};4326 u8 key[SMB3_ENC_DEC_KEY_SIZE];4327 struct aead_request *req;4328 u8 *iv;4329 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);4330 void *creq;4331 size_t sensitive_size;4332 4333 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);4334 if (rc) {4335 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,4336 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));4337 return rc;4338 }4339 4340 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||4341 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))4342 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);4343 else4344 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);4345 4346 if (rc) {4347 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);4348 return rc;4349 }4350 4351 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);4352 if (rc) {4353 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);4354 return rc;4355 }4356 4357 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,4358 &sensitive_size);4359 if (IS_ERR(creq))4360 return PTR_ERR(creq);4361 4362 if (!enc) {4363 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);4364 crypt_len += SMB2_SIGNATURE_SIZE;4365 }4366 4367 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||4368 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))4369 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);4370 else {4371 iv[0] = 3;4372 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);4373 }4374 4375 aead_request_set_tfm(req, tfm);4376 aead_request_set_crypt(req, sg, sg, crypt_len, iv);4377 aead_request_set_ad(req, assoc_data_len);4378 4379 rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);4380 4381 if (!rc && enc)4382 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);4383 4384 kvfree_sensitive(creq, sensitive_size);4385 return rc;4386}4387 4388/*4389 * Clear a read buffer, discarding the folios which have the 1st mark set.4390 */4391static void cifs_clear_folioq_buffer(struct folio_queue *buffer)4392{4393 struct folio_queue *folioq;4394 4395 while ((folioq = buffer)) {4396 for (int s = 0; s < folioq_count(folioq); s++)4397 if (folioq_is_marked(folioq, s))4398 folio_put(folioq_folio(folioq, s));4399 buffer = folioq->next;4400 kfree(folioq);4401 }4402}4403 4404/*4405 * Allocate buffer space into a folio queue.4406 */4407static struct folio_queue *cifs_alloc_folioq_buffer(ssize_t size)4408{4409 struct folio_queue *buffer = NULL, *tail = NULL, *p;4410 struct folio *folio;4411 unsigned int slot;4412 4413 do {4414 if (!tail || folioq_full(tail)) {4415 p = kmalloc(sizeof(*p), GFP_NOFS);4416 if (!p)4417 goto nomem;4418 folioq_init(p);4419 if (tail) {4420 tail->next = p;4421 p->prev = tail;4422 } else {4423 buffer = p;4424 }4425 tail = p;4426 }4427 4428 folio = folio_alloc(GFP_KERNEL|__GFP_HIGHMEM, 0);4429 if (!folio)4430 goto nomem;4431 4432 slot = folioq_append_mark(tail, folio);4433 size -= folioq_folio_size(tail, slot);4434 } while (size > 0);4435 4436 return buffer;4437 4438nomem:4439 cifs_clear_folioq_buffer(buffer);4440 return NULL;4441}4442 4443/*4444 * Copy data from an iterator to the folios in a folio queue buffer.4445 */4446static bool cifs_copy_iter_to_folioq(struct iov_iter *iter, size_t size,4447 struct folio_queue *buffer)4448{4449 for (; buffer; buffer = buffer->next) {4450 for (int s = 0; s < folioq_count(buffer); s++) {4451 struct folio *folio = folioq_folio(buffer, s);4452 size_t part = folioq_folio_size(buffer, s);4453 4454 part = umin(part, size);4455 4456 if (copy_folio_from_iter(folio, 0, part, iter) != part)4457 return false;4458 size -= part;4459 }4460 }4461 return true;4462}4463 4464void4465smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)4466{4467 for (int i = 0; i < num_rqst; i++)4468 cifs_clear_folioq_buffer(rqst[i].rq_buffer);4469}4470 4471/*4472 * This function will initialize new_rq and encrypt the content.4473 * The first entry, new_rq[0], only contains a single iov which contains4474 * a smb2_transform_hdr and is pre-allocated by the caller.4475 * This function then populates new_rq[1+] with the content from olq_rq[0+].4476 *4477 * The end result is an array of smb_rqst structures where the first structure4478 * only contains a single iov for the transform header which we then can pass4479 * to crypt_message().4480 *4481 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller4482 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests4483 */4484static int4485smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,4486 struct smb_rqst *new_rq, struct smb_rqst *old_rq)4487{4488 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;4489 unsigned int orig_len = 0;4490 int rc = -ENOMEM;4491 4492 for (int i = 1; i < num_rqst; i++) {4493 struct smb_rqst *old = &old_rq[i - 1];4494 struct smb_rqst *new = &new_rq[i];4495 struct folio_queue *buffer;4496 size_t size = iov_iter_count(&old->rq_iter);4497 4498 orig_len += smb_rqst_len(server, old);4499 new->rq_iov = old->rq_iov;4500 new->rq_nvec = old->rq_nvec;4501 4502 if (size > 0) {4503 buffer = cifs_alloc_folioq_buffer(size);4504 if (!buffer)4505 goto err_free;4506 4507 new->rq_buffer = buffer;4508 iov_iter_folio_queue(&new->rq_iter, ITER_SOURCE,4509 buffer, 0, 0, size);4510 4511 if (!cifs_copy_iter_to_folioq(&old->rq_iter, size, buffer)) {4512 rc = -EIO;4513 goto err_free;4514 }4515 }4516 }4517 4518 /* fill the 1st iov with a transform header */4519 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);4520 4521 rc = crypt_message(server, num_rqst, new_rq, 1, server->secmech.enc);4522 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);4523 if (rc)4524 goto err_free;4525 4526 return rc;4527 4528err_free:4529 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);4530 return rc;4531}4532 4533static int4534smb3_is_transform_hdr(void *buf)4535{4536 struct smb2_transform_hdr *trhdr = buf;4537 4538 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;4539}4540 4541static int4542decrypt_raw_data(struct TCP_Server_Info *server, char *buf,4543 unsigned int buf_data_size, struct iov_iter *iter,4544 bool is_offloaded)4545{4546 struct crypto_aead *tfm;4547 struct smb_rqst rqst = {NULL};4548 struct kvec iov[2];4549 size_t iter_size = 0;4550 int rc;4551 4552 iov[0].iov_base = buf;4553 iov[0].iov_len = sizeof(struct smb2_transform_hdr);4554 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);4555 iov[1].iov_len = buf_data_size;4556 4557 rqst.rq_iov = iov;4558 rqst.rq_nvec = 2;4559 if (iter) {4560 rqst.rq_iter = *iter;4561 iter_size = iov_iter_count(iter);4562 }4563 4564 if (is_offloaded) {4565 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||4566 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))4567 tfm = crypto_alloc_aead("gcm(aes)", 0, 0);4568 else4569 tfm = crypto_alloc_aead("ccm(aes)", 0, 0);4570 if (IS_ERR(tfm)) {4571 rc = PTR_ERR(tfm);4572 cifs_server_dbg(VFS, "%s: Failed alloc decrypt TFM, rc=%d\n", __func__, rc);4573 4574 return rc;4575 }4576 } else {4577 if (unlikely(!server->secmech.dec))4578 return -EIO;4579 4580 tfm = server->secmech.dec;4581 }4582 4583 rc = crypt_message(server, 1, &rqst, 0, tfm);4584 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);4585 4586 if (is_offloaded)4587 crypto_free_aead(tfm);4588 4589 if (rc)4590 return rc;4591 4592 memmove(buf, iov[1].iov_base, buf_data_size);4593 4594 if (!is_offloaded)4595 server->total_read = buf_data_size + iter_size;4596 4597 return rc;4598}4599 4600static int4601cifs_copy_folioq_to_iter(struct folio_queue *folioq, size_t data_size,4602 size_t skip, struct iov_iter *iter)4603{4604 for (; folioq; folioq = folioq->next) {4605 for (int s = 0; s < folioq_count(folioq); s++) {4606 struct folio *folio = folioq_folio(folioq, s);4607 size_t fsize = folio_size(folio);4608 size_t n, len = umin(fsize - skip, data_size);4609 4610 n = copy_folio_to_iter(folio, skip, len, iter);4611 if (n != len) {4612 cifs_dbg(VFS, "%s: something went wrong\n", __func__);4613 return -EIO;4614 }4615 data_size -= n;4616 skip = 0;4617 }4618 }4619 4620 return 0;4621}4622 4623static int4624handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,4625 char *buf, unsigned int buf_len, struct folio_queue *buffer,4626 unsigned int buffer_len, bool is_offloaded)4627{4628 unsigned int data_offset;4629 unsigned int data_len;4630 unsigned int cur_off;4631 unsigned int cur_page_idx;4632 unsigned int pad_len;4633 struct cifs_io_subrequest *rdata = mid->callback_data;4634 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;4635 int length;4636 bool use_rdma_mr = false;4637 4638 if (shdr->Command != SMB2_READ) {4639 cifs_server_dbg(VFS, "only big read responses are supported\n");4640 return -EOPNOTSUPP;4641 }4642 4643 if (server->ops->is_session_expired &&4644 server->ops->is_session_expired(buf)) {4645 if (!is_offloaded)4646 cifs_reconnect(server, true);4647 return -1;4648 }4649 4650 if (server->ops->is_status_pending &&4651 server->ops->is_status_pending(buf, server))4652 return -1;4653 4654 /* set up first two iov to get credits */4655 rdata->iov[0].iov_base = buf;4656 rdata->iov[0].iov_len = 0;4657 rdata->iov[1].iov_base = buf;4658 rdata->iov[1].iov_len =4659 min_t(unsigned int, buf_len, server->vals->read_rsp_size);4660 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",4661 rdata->iov[0].iov_base, rdata->iov[0].iov_len);4662 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",4663 rdata->iov[1].iov_base, rdata->iov[1].iov_len);4664 4665 rdata->result = server->ops->map_error(buf, true);4666 if (rdata->result != 0) {4667 cifs_dbg(FYI, "%s: server returned error %d\n",4668 __func__, rdata->result);4669 /* normal error on read response */4670 if (is_offloaded)4671 mid->mid_state = MID_RESPONSE_RECEIVED;4672 else4673 dequeue_mid(mid, false);4674 return 0;4675 }4676 4677 data_offset = server->ops->read_data_offset(buf);4678#ifdef CONFIG_CIFS_SMB_DIRECT4679 use_rdma_mr = rdata->mr;4680#endif4681 data_len = server->ops->read_data_length(buf, use_rdma_mr);4682 4683 if (data_offset < server->vals->read_rsp_size) {4684 /*4685 * win2k8 sometimes sends an offset of 0 when the read4686 * is beyond the EOF. Treat it as if the data starts just after4687 * the header.4688 */4689 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",4690 __func__, data_offset);4691 data_offset = server->vals->read_rsp_size;4692 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {4693 /* data_offset is beyond the end of smallbuf */4694 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",4695 __func__, data_offset);4696 rdata->result = -EIO;4697 if (is_offloaded)4698 mid->mid_state = MID_RESPONSE_MALFORMED;4699 else4700 dequeue_mid(mid, rdata->result);4701 return 0;4702 }4703 4704 pad_len = data_offset - server->vals->read_rsp_size;4705 4706 if (buf_len <= data_offset) {4707 /* read response payload is in pages */4708 cur_page_idx = pad_len / PAGE_SIZE;4709 cur_off = pad_len % PAGE_SIZE;4710 4711 if (cur_page_idx != 0) {4712 /* data offset is beyond the 1st page of response */4713 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",4714 __func__, data_offset);4715 rdata->result = -EIO;4716 if (is_offloaded)4717 mid->mid_state = MID_RESPONSE_MALFORMED;4718 else4719 dequeue_mid(mid, rdata->result);4720 return 0;4721 }4722 4723 if (data_len > buffer_len - pad_len) {4724 /* data_len is corrupt -- discard frame */4725 rdata->result = -EIO;4726 if (is_offloaded)4727 mid->mid_state = MID_RESPONSE_MALFORMED;4728 else4729 dequeue_mid(mid, rdata->result);4730 return 0;4731 }4732 4733 /* Copy the data to the output I/O iterator. */4734 rdata->result = cifs_copy_folioq_to_iter(buffer, buffer_len,4735 cur_off, &rdata->subreq.io_iter);4736 if (rdata->result != 0) {4737 if (is_offloaded)4738 mid->mid_state = MID_RESPONSE_MALFORMED;4739 else4740 dequeue_mid(mid, rdata->result);4741 return 0;4742 }4743 rdata->got_bytes = buffer_len;4744 4745 } else if (buf_len >= data_offset + data_len) {4746 /* read response payload is in buf */4747 WARN_ONCE(buffer, "read data can be either in buf or in buffer");4748 length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter);4749 if (length < 0)4750 return length;4751 rdata->got_bytes = data_len;4752 } else {4753 /* read response payload cannot be in both buf and pages */4754 WARN_ONCE(1, "buf can not contain only a part of read data");4755 rdata->result = -EIO;4756 if (is_offloaded)4757 mid->mid_state = MID_RESPONSE_MALFORMED;4758 else4759 dequeue_mid(mid, rdata->result);4760 return 0;4761 }4762 4763 if (is_offloaded)4764 mid->mid_state = MID_RESPONSE_RECEIVED;4765 else4766 dequeue_mid(mid, false);4767 return 0;4768}4769 4770struct smb2_decrypt_work {4771 struct work_struct decrypt;4772 struct TCP_Server_Info *server;4773 struct folio_queue *buffer;4774 char *buf;4775 unsigned int len;4776};4777 4778 4779static void smb2_decrypt_offload(struct work_struct *work)4780{4781 struct smb2_decrypt_work *dw = container_of(work,4782 struct smb2_decrypt_work, decrypt);4783 int rc;4784 struct mid_q_entry *mid;4785 struct iov_iter iter;4786 4787 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, dw->len);4788 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,4789 &iter, true);4790 if (rc) {4791 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);4792 goto free_pages;4793 }4794 4795 dw->server->lstrp = jiffies;4796 mid = smb2_find_dequeue_mid(dw->server, dw->buf);4797 if (mid == NULL)4798 cifs_dbg(FYI, "mid not found\n");4799 else {4800 mid->decrypted = true;4801 rc = handle_read_data(dw->server, mid, dw->buf,4802 dw->server->vals->read_rsp_size,4803 dw->buffer, dw->len,4804 true);4805 if (rc >= 0) {4806#ifdef CONFIG_CIFS_STATS24807 mid->when_received = jiffies;4808#endif4809 if (dw->server->ops->is_network_name_deleted)4810 dw->server->ops->is_network_name_deleted(dw->buf,4811 dw->server);4812 4813 mid->callback(mid);4814 } else {4815 spin_lock(&dw->server->srv_lock);4816 if (dw->server->tcpStatus == CifsNeedReconnect) {4817 spin_lock(&dw->server->mid_lock);4818 mid->mid_state = MID_RETRY_NEEDED;4819 spin_unlock(&dw->server->mid_lock);4820 spin_unlock(&dw->server->srv_lock);4821 mid->callback(mid);4822 } else {4823 spin_lock(&dw->server->mid_lock);4824 mid->mid_state = MID_REQUEST_SUBMITTED;4825 mid->mid_flags &= ~(MID_DELETED);4826 list_add_tail(&mid->qhead,4827 &dw->server->pending_mid_q);4828 spin_unlock(&dw->server->mid_lock);4829 spin_unlock(&dw->server->srv_lock);4830 }4831 }4832 release_mid(mid);4833 }4834 4835free_pages:4836 cifs_clear_folioq_buffer(dw->buffer);4837 cifs_small_buf_release(dw->buf);4838 kfree(dw);4839}4840 4841 4842static int4843receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,4844 int *num_mids)4845{4846 char *buf = server->smallbuf;4847 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;4848 struct iov_iter iter;4849 unsigned int len;4850 unsigned int buflen = server->pdu_size;4851 int rc;4852 struct smb2_decrypt_work *dw;4853 4854 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);4855 if (!dw)4856 return -ENOMEM;4857 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);4858 dw->server = server;4859 4860 *num_mids = 1;4861 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +4862 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;4863 4864 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);4865 if (rc < 0)4866 goto free_dw;4867 server->total_read += rc;4868 4869 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -4870 server->vals->read_rsp_size;4871 dw->len = len;4872 len = round_up(dw->len, PAGE_SIZE);4873 4874 rc = -ENOMEM;4875 dw->buffer = cifs_alloc_folioq_buffer(len);4876 if (!dw->buffer)4877 goto discard_data;4878 4879 iov_iter_folio_queue(&iter, ITER_DEST, dw->buffer, 0, 0, len);4880 4881 /* Read the data into the buffer and clear excess bufferage. */4882 rc = cifs_read_iter_from_socket(server, &iter, dw->len);4883 if (rc < 0)4884 goto discard_data;4885 4886 server->total_read += rc;4887 if (rc < len) {4888 struct iov_iter tmp = iter;4889 4890 iov_iter_advance(&tmp, rc);4891 iov_iter_zero(len - rc, &tmp);4892 }4893 iov_iter_truncate(&iter, dw->len);4894 4895 rc = cifs_discard_remaining_data(server);4896 if (rc)4897 goto free_pages;4898 4899 /*4900 * For large reads, offload to different thread for better performance,4901 * use more cores decrypting which can be expensive4902 */4903 4904 if ((server->min_offload) && (server->in_flight > 1) &&4905 (server->pdu_size >= server->min_offload)) {4906 dw->buf = server->smallbuf;4907 server->smallbuf = (char *)cifs_small_buf_get();4908 4909 queue_work(decrypt_wq, &dw->decrypt);4910 *num_mids = 0; /* worker thread takes care of finding mid */4911 return -1;4912 }4913 4914 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,4915 &iter, false);4916 if (rc)4917 goto free_pages;4918 4919 *mid = smb2_find_mid(server, buf);4920 if (*mid == NULL) {4921 cifs_dbg(FYI, "mid not found\n");4922 } else {4923 cifs_dbg(FYI, "mid found\n");4924 (*mid)->decrypted = true;4925 rc = handle_read_data(server, *mid, buf,4926 server->vals->read_rsp_size,4927 dw->buffer, dw->len, false);4928 if (rc >= 0) {4929 if (server->ops->is_network_name_deleted) {4930 server->ops->is_network_name_deleted(buf,4931 server);4932 }4933 }4934 }4935 4936free_pages:4937 cifs_clear_folioq_buffer(dw->buffer);4938free_dw:4939 kfree(dw);4940 return rc;4941discard_data:4942 cifs_discard_remaining_data(server);4943 goto free_pages;4944}4945 4946static int4947receive_encrypted_standard(struct TCP_Server_Info *server,4948 struct mid_q_entry **mids, char **bufs,4949 int *num_mids)4950{4951 int ret, length;4952 char *buf = server->smallbuf;4953 struct smb2_hdr *shdr;4954 unsigned int pdu_length = server->pdu_size;4955 unsigned int buf_size;4956 unsigned int next_cmd;4957 struct mid_q_entry *mid_entry;4958 int next_is_large;4959 char *next_buffer = NULL;4960 4961 *num_mids = 0;4962 4963 /* switch to large buffer if too big for a small one */4964 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {4965 server->large_buf = true;4966 memcpy(server->bigbuf, buf, server->total_read);4967 buf = server->bigbuf;4968 }4969 4970 /* now read the rest */4971 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,4972 pdu_length - HEADER_SIZE(server) + 1);4973 if (length < 0)4974 return length;4975 server->total_read += length;4976 4977 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);4978 length = decrypt_raw_data(server, buf, buf_size, NULL, false);4979 if (length)4980 return length;4981 4982 next_is_large = server->large_buf;4983one_more:4984 shdr = (struct smb2_hdr *)buf;4985 next_cmd = le32_to_cpu(shdr->NextCommand);4986 if (next_cmd) {4987 if (WARN_ON_ONCE(next_cmd > pdu_length))4988 return -1;4989 if (next_is_large)4990 next_buffer = (char *)cifs_buf_get();4991 else4992 next_buffer = (char *)cifs_small_buf_get();4993 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);4994 }4995 4996 mid_entry = smb2_find_mid(server, buf);4997 if (mid_entry == NULL)4998 cifs_dbg(FYI, "mid not found\n");4999 else {5000 cifs_dbg(FYI, "mid found\n");5001 mid_entry->decrypted = true;5002 mid_entry->resp_buf_size = server->pdu_size;5003 }5004 5005 if (*num_mids >= MAX_COMPOUND) {5006 cifs_server_dbg(VFS, "too many PDUs in compound\n");5007 return -1;5008 }5009 bufs[*num_mids] = buf;5010 mids[(*num_mids)++] = mid_entry;5011 5012 if (mid_entry && mid_entry->handle)5013 ret = mid_entry->handle(server, mid_entry);5014 else5015 ret = cifs_handle_standard(server, mid_entry);5016 5017 if (ret == 0 && next_cmd) {5018 pdu_length -= next_cmd;5019 server->large_buf = next_is_large;5020 if (next_is_large)5021 server->bigbuf = buf = next_buffer;5022 else5023 server->smallbuf = buf = next_buffer;5024 goto one_more;5025 } else if (ret != 0) {5026 /*5027 * ret != 0 here means that we didn't get to handle_mid() thus5028 * server->smallbuf and server->bigbuf are still valid. We need5029 * to free next_buffer because it is not going to be used5030 * anywhere.5031 */5032 if (next_is_large)5033 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);5034 else5035 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);5036 }5037 5038 return ret;5039}5040 5041static int5042smb3_receive_transform(struct TCP_Server_Info *server,5043 struct mid_q_entry **mids, char **bufs, int *num_mids)5044{5045 char *buf = server->smallbuf;5046 unsigned int pdu_length = server->pdu_size;5047 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;5048 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);5049 5050 if (pdu_length < sizeof(struct smb2_transform_hdr) +5051 sizeof(struct smb2_hdr)) {5052 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",5053 pdu_length);5054 cifs_reconnect(server, true);5055 return -ECONNABORTED;5056 }5057 5058 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {5059 cifs_server_dbg(VFS, "Transform message is broken\n");5060 cifs_reconnect(server, true);5061 return -ECONNABORTED;5062 }5063 5064 /* TODO: add support for compounds containing READ. */5065 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {5066 return receive_encrypted_read(server, &mids[0], num_mids);5067 }5068 5069 return receive_encrypted_standard(server, mids, bufs, num_mids);5070}5071 5072int5073smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)5074{5075 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;5076 5077 return handle_read_data(server, mid, buf, server->pdu_size,5078 NULL, 0, false);5079}5080 5081static int smb2_next_header(struct TCP_Server_Info *server, char *buf,5082 unsigned int *noff)5083{5084 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;5085 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;5086 5087 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {5088 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);5089 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))5090 return -EINVAL;5091 } else {5092 *noff = le32_to_cpu(hdr->NextCommand);5093 }5094 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))5095 return -EINVAL;5096 return 0;5097}5098 5099int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,5100 struct dentry *dentry, struct cifs_tcon *tcon,5101 const char *full_path, umode_t mode, dev_t dev,5102 const char *symname)5103{5104 struct TCP_Server_Info *server = tcon->ses->server;5105 struct cifs_open_parms oparms;5106 struct cifs_io_parms io_parms = {};5107 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);5108 struct cifs_fid fid;5109 unsigned int bytes_written;5110 u8 type[8];5111 int type_len = 0;5112 struct {5113 __le64 major;5114 __le64 minor;5115 } __packed pdev = {};5116 __le16 *symname_utf16 = NULL;5117 u8 *data = NULL;5118 int data_len = 0;5119 struct kvec iov[3];5120 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;5121 int rc;5122 5123 switch (mode & S_IFMT) {5124 case S_IFCHR:5125 type_len = 8;5126 memcpy(type, "IntxCHR\0", type_len);5127 pdev.major = cpu_to_le64(MAJOR(dev));5128 pdev.minor = cpu_to_le64(MINOR(dev));5129 data = (u8 *)&pdev;5130 data_len = sizeof(pdev);5131 break;5132 case S_IFBLK:5133 type_len = 8;5134 memcpy(type, "IntxBLK\0", type_len);5135 pdev.major = cpu_to_le64(MAJOR(dev));5136 pdev.minor = cpu_to_le64(MINOR(dev));5137 data = (u8 *)&pdev;5138 data_len = sizeof(pdev);5139 break;5140 case S_IFLNK:5141 type_len = 8;5142 memcpy(type, "IntxLNK\1", type_len);5143 symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname),5144 &data_len, cifs_sb->local_nls,5145 NO_MAP_UNI_RSVD);5146 if (!symname_utf16) {5147 rc = -ENOMEM;5148 goto out;5149 }5150 data_len -= 2; /* symlink is without trailing wide-nul */5151 data = (u8 *)symname_utf16;5152 break;5153 case S_IFSOCK:5154 type_len = 8;5155 strscpy(type, "LnxSOCK");5156 data = (u8 *)&pdev;5157 data_len = sizeof(pdev);5158 break;5159 case S_IFIFO:5160 type_len = 8;5161 strscpy(type, "LnxFIFO");5162 data = (u8 *)&pdev;5163 data_len = sizeof(pdev);5164 break;5165 default:5166 rc = -EPERM;5167 goto out;5168 }5169 5170 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE,5171 FILE_CREATE, CREATE_NOT_DIR |5172 CREATE_OPTION_SPECIAL, ACL_NO_MODE);5173 oparms.fid = &fid;5174 5175 rc = server->ops->open(xid, &oparms, &oplock, NULL);5176 if (rc)5177 goto out;5178 5179 if (type_len + data_len > 0) {5180 io_parms.pid = current->tgid;5181 io_parms.tcon = tcon;5182 io_parms.length = type_len + data_len;5183 iov[1].iov_base = type;5184 iov[1].iov_len = type_len;5185 iov[2].iov_base = data;5186 iov[2].iov_len = data_len;5187 5188 rc = server->ops->sync_write(xid, &fid, &io_parms,5189 &bytes_written,5190 iov, ARRAY_SIZE(iov)-1);5191 }5192 5193 server->ops->close(xid, tcon, &fid);5194 5195out:5196 kfree(symname_utf16);5197 return rc;5198}5199 5200int cifs_sfu_make_node(unsigned int xid, struct inode *inode,5201 struct dentry *dentry, struct cifs_tcon *tcon,5202 const char *full_path, umode_t mode, dev_t dev)5203{5204 struct inode *new = NULL;5205 int rc;5206 5207 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon,5208 full_path, mode, dev, NULL);5209 if (rc)5210 return rc;5211 5212 if (tcon->posix_extensions) {5213 rc = smb311_posix_get_inode_info(&new, full_path, NULL,5214 inode->i_sb, xid);5215 } else if (tcon->unix_ext) {5216 rc = cifs_get_inode_info_unix(&new, full_path,5217 inode->i_sb, xid);5218 } else {5219 rc = cifs_get_inode_info(&new, full_path, NULL,5220 inode->i_sb, xid, NULL);5221 }5222 if (!rc)5223 d_instantiate(dentry, new);5224 return rc;5225}5226 5227static int smb2_make_node(unsigned int xid, struct inode *inode,5228 struct dentry *dentry, struct cifs_tcon *tcon,5229 const char *full_path, umode_t mode, dev_t dev)5230{5231 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);5232 int rc;5233 5234 /*5235 * Check if mounted with mount parm 'sfu' mount parm.5236 * SFU emulation should work with all servers, but only5237 * supports block and char device, socket & fifo,5238 * and was used by default in earlier versions of Windows5239 */5240 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {5241 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,5242 full_path, mode, dev);5243 } else {5244 rc = smb2_mknod_reparse(xid, inode, dentry, tcon,5245 full_path, mode, dev);5246 }5247 return rc;5248}5249 5250#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY5251struct smb_version_operations smb20_operations = {5252 .compare_fids = smb2_compare_fids,5253 .setup_request = smb2_setup_request,5254 .setup_async_request = smb2_setup_async_request,5255 .check_receive = smb2_check_receive,5256 .add_credits = smb2_add_credits,5257 .set_credits = smb2_set_credits,5258 .get_credits_field = smb2_get_credits_field,5259 .get_credits = smb2_get_credits,5260 .wait_mtu_credits = cifs_wait_mtu_credits,5261 .get_next_mid = smb2_get_next_mid,5262 .revert_current_mid = smb2_revert_current_mid,5263 .read_data_offset = smb2_read_data_offset,5264 .read_data_length = smb2_read_data_length,5265 .map_error = map_smb2_to_linux_error,5266 .find_mid = smb2_find_mid,5267 .check_message = smb2_check_message,5268 .dump_detail = smb2_dump_detail,5269 .clear_stats = smb2_clear_stats,5270 .print_stats = smb2_print_stats,5271 .is_oplock_break = smb2_is_valid_oplock_break,5272 .handle_cancelled_mid = smb2_handle_cancelled_mid,5273 .downgrade_oplock = smb2_downgrade_oplock,5274 .need_neg = smb2_need_neg,5275 .negotiate = smb2_negotiate,5276 .negotiate_wsize = smb2_negotiate_wsize,5277 .negotiate_rsize = smb2_negotiate_rsize,5278 .sess_setup = SMB2_sess_setup,5279 .logoff = SMB2_logoff,5280 .tree_connect = SMB2_tcon,5281 .tree_disconnect = SMB2_tdis,5282 .qfs_tcon = smb2_qfs_tcon,5283 .is_path_accessible = smb2_is_path_accessible,5284 .can_echo = smb2_can_echo,5285 .echo = SMB2_echo,5286 .query_path_info = smb2_query_path_info,5287 .query_reparse_point = smb2_query_reparse_point,5288 .get_srv_inum = smb2_get_srv_inum,5289 .query_file_info = smb2_query_file_info,5290 .set_path_size = smb2_set_path_size,5291 .set_file_size = smb2_set_file_size,5292 .set_file_info = smb2_set_file_info,5293 .set_compression = smb2_set_compression,5294 .mkdir = smb2_mkdir,5295 .mkdir_setinfo = smb2_mkdir_setinfo,5296 .rmdir = smb2_rmdir,5297 .unlink = smb2_unlink,5298 .rename = smb2_rename_path,5299 .create_hardlink = smb2_create_hardlink,5300 .parse_reparse_point = smb2_parse_reparse_point,5301 .query_mf_symlink = smb3_query_mf_symlink,5302 .create_mf_symlink = smb3_create_mf_symlink,5303 .create_reparse_symlink = smb2_create_reparse_symlink,5304 .open = smb2_open_file,5305 .set_fid = smb2_set_fid,5306 .close = smb2_close_file,5307 .flush = smb2_flush_file,5308 .async_readv = smb2_async_readv,5309 .async_writev = smb2_async_writev,5310 .sync_read = smb2_sync_read,5311 .sync_write = smb2_sync_write,5312 .query_dir_first = smb2_query_dir_first,5313 .query_dir_next = smb2_query_dir_next,5314 .close_dir = smb2_close_dir,5315 .calc_smb_size = smb2_calc_size,5316 .is_status_pending = smb2_is_status_pending,5317 .is_session_expired = smb2_is_session_expired,5318 .oplock_response = smb2_oplock_response,5319 .queryfs = smb2_queryfs,5320 .mand_lock = smb2_mand_lock,5321 .mand_unlock_range = smb2_unlock_range,5322 .push_mand_locks = smb2_push_mandatory_locks,5323 .get_lease_key = smb2_get_lease_key,5324 .set_lease_key = smb2_set_lease_key,5325 .new_lease_key = smb2_new_lease_key,5326 .calc_signature = smb2_calc_signature,5327 .is_read_op = smb2_is_read_op,5328 .set_oplock_level = smb2_set_oplock_level,5329 .create_lease_buf = smb2_create_lease_buf,5330 .parse_lease_buf = smb2_parse_lease_buf,5331 .copychunk_range = smb2_copychunk_range,5332 .wp_retry_size = smb2_wp_retry_size,5333 .dir_needs_close = smb2_dir_needs_close,5334 .get_dfs_refer = smb2_get_dfs_refer,5335 .select_sectype = smb2_select_sectype,5336#ifdef CONFIG_CIFS_XATTR5337 .query_all_EAs = smb2_query_eas,5338 .set_EA = smb2_set_ea,5339#endif /* CIFS_XATTR */5340 .get_acl = get_smb2_acl,5341 .get_acl_by_fid = get_smb2_acl_by_fid,5342 .set_acl = set_smb2_acl,5343 .next_header = smb2_next_header,5344 .ioctl_query_info = smb2_ioctl_query_info,5345 .make_node = smb2_make_node,5346 .fiemap = smb3_fiemap,5347 .llseek = smb3_llseek,5348 .is_status_io_timeout = smb2_is_status_io_timeout,5349 .is_network_name_deleted = smb2_is_network_name_deleted,5350};5351#endif /* CIFS_ALLOW_INSECURE_LEGACY */5352 5353struct smb_version_operations smb21_operations = {5354 .compare_fids = smb2_compare_fids,5355 .setup_request = smb2_setup_request,5356 .setup_async_request = smb2_setup_async_request,5357 .check_receive = smb2_check_receive,5358 .add_credits = smb2_add_credits,5359 .set_credits = smb2_set_credits,5360 .get_credits_field = smb2_get_credits_field,5361 .get_credits = smb2_get_credits,5362 .wait_mtu_credits = smb2_wait_mtu_credits,5363 .adjust_credits = smb2_adjust_credits,5364 .get_next_mid = smb2_get_next_mid,5365 .revert_current_mid = smb2_revert_current_mid,5366 .read_data_offset = smb2_read_data_offset,5367 .read_data_length = smb2_read_data_length,5368 .map_error = map_smb2_to_linux_error,5369 .find_mid = smb2_find_mid,5370 .check_message = smb2_check_message,5371 .dump_detail = smb2_dump_detail,5372 .clear_stats = smb2_clear_stats,5373 .print_stats = smb2_print_stats,5374 .is_oplock_break = smb2_is_valid_oplock_break,5375 .handle_cancelled_mid = smb2_handle_cancelled_mid,5376 .downgrade_oplock = smb2_downgrade_oplock,5377 .need_neg = smb2_need_neg,5378 .negotiate = smb2_negotiate,5379 .negotiate_wsize = smb2_negotiate_wsize,5380 .negotiate_rsize = smb2_negotiate_rsize,5381 .sess_setup = SMB2_sess_setup,5382 .logoff = SMB2_logoff,5383 .tree_connect = SMB2_tcon,5384 .tree_disconnect = SMB2_tdis,5385 .qfs_tcon = smb2_qfs_tcon,5386 .is_path_accessible = smb2_is_path_accessible,5387 .can_echo = smb2_can_echo,5388 .echo = SMB2_echo,5389 .query_path_info = smb2_query_path_info,5390 .query_reparse_point = smb2_query_reparse_point,5391 .get_srv_inum = smb2_get_srv_inum,5392 .query_file_info = smb2_query_file_info,5393 .set_path_size = smb2_set_path_size,5394 .set_file_size = smb2_set_file_size,5395 .set_file_info = smb2_set_file_info,5396 .set_compression = smb2_set_compression,5397 .mkdir = smb2_mkdir,5398 .mkdir_setinfo = smb2_mkdir_setinfo,5399 .rmdir = smb2_rmdir,5400 .unlink = smb2_unlink,5401 .rename = smb2_rename_path,5402 .create_hardlink = smb2_create_hardlink,5403 .parse_reparse_point = smb2_parse_reparse_point,5404 .query_mf_symlink = smb3_query_mf_symlink,5405 .create_mf_symlink = smb3_create_mf_symlink,5406 .create_reparse_symlink = smb2_create_reparse_symlink,5407 .open = smb2_open_file,5408 .set_fid = smb2_set_fid,5409 .close = smb2_close_file,5410 .flush = smb2_flush_file,5411 .async_readv = smb2_async_readv,5412 .async_writev = smb2_async_writev,5413 .sync_read = smb2_sync_read,5414 .sync_write = smb2_sync_write,5415 .query_dir_first = smb2_query_dir_first,5416 .query_dir_next = smb2_query_dir_next,5417 .close_dir = smb2_close_dir,5418 .calc_smb_size = smb2_calc_size,5419 .is_status_pending = smb2_is_status_pending,5420 .is_session_expired = smb2_is_session_expired,5421 .oplock_response = smb2_oplock_response,5422 .queryfs = smb2_queryfs,5423 .mand_lock = smb2_mand_lock,5424 .mand_unlock_range = smb2_unlock_range,5425 .push_mand_locks = smb2_push_mandatory_locks,5426 .get_lease_key = smb2_get_lease_key,5427 .set_lease_key = smb2_set_lease_key,5428 .new_lease_key = smb2_new_lease_key,5429 .calc_signature = smb2_calc_signature,5430 .is_read_op = smb21_is_read_op,5431 .set_oplock_level = smb21_set_oplock_level,5432 .create_lease_buf = smb2_create_lease_buf,5433 .parse_lease_buf = smb2_parse_lease_buf,5434 .copychunk_range = smb2_copychunk_range,5435 .wp_retry_size = smb2_wp_retry_size,5436 .dir_needs_close = smb2_dir_needs_close,5437 .enum_snapshots = smb3_enum_snapshots,5438 .notify = smb3_notify,5439 .get_dfs_refer = smb2_get_dfs_refer,5440 .select_sectype = smb2_select_sectype,5441#ifdef CONFIG_CIFS_XATTR5442 .query_all_EAs = smb2_query_eas,5443 .set_EA = smb2_set_ea,5444#endif /* CIFS_XATTR */5445 .get_acl = get_smb2_acl,5446 .get_acl_by_fid = get_smb2_acl_by_fid,5447 .set_acl = set_smb2_acl,5448 .next_header = smb2_next_header,5449 .ioctl_query_info = smb2_ioctl_query_info,5450 .make_node = smb2_make_node,5451 .fiemap = smb3_fiemap,5452 .llseek = smb3_llseek,5453 .is_status_io_timeout = smb2_is_status_io_timeout,5454 .is_network_name_deleted = smb2_is_network_name_deleted,5455};5456 5457struct smb_version_operations smb30_operations = {5458 .compare_fids = smb2_compare_fids,5459 .setup_request = smb2_setup_request,5460 .setup_async_request = smb2_setup_async_request,5461 .check_receive = smb2_check_receive,5462 .add_credits = smb2_add_credits,5463 .set_credits = smb2_set_credits,5464 .get_credits_field = smb2_get_credits_field,5465 .get_credits = smb2_get_credits,5466 .wait_mtu_credits = smb2_wait_mtu_credits,5467 .adjust_credits = smb2_adjust_credits,5468 .get_next_mid = smb2_get_next_mid,5469 .revert_current_mid = smb2_revert_current_mid,5470 .read_data_offset = smb2_read_data_offset,5471 .read_data_length = smb2_read_data_length,5472 .map_error = map_smb2_to_linux_error,5473 .find_mid = smb2_find_mid,5474 .check_message = smb2_check_message,5475 .dump_detail = smb2_dump_detail,5476 .clear_stats = smb2_clear_stats,5477 .print_stats = smb2_print_stats,5478 .dump_share_caps = smb2_dump_share_caps,5479 .is_oplock_break = smb2_is_valid_oplock_break,5480 .handle_cancelled_mid = smb2_handle_cancelled_mid,5481 .downgrade_oplock = smb3_downgrade_oplock,5482 .need_neg = smb2_need_neg,5483 .negotiate = smb2_negotiate,5484 .negotiate_wsize = smb3_negotiate_wsize,5485 .negotiate_rsize = smb3_negotiate_rsize,5486 .sess_setup = SMB2_sess_setup,5487 .logoff = SMB2_logoff,5488 .tree_connect = SMB2_tcon,5489 .tree_disconnect = SMB2_tdis,5490 .qfs_tcon = smb3_qfs_tcon,5491 .query_server_interfaces = SMB3_request_interfaces,5492 .is_path_accessible = smb2_is_path_accessible,5493 .can_echo = smb2_can_echo,5494 .echo = SMB2_echo,5495 .query_path_info = smb2_query_path_info,5496 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */5497 .query_reparse_point = smb2_query_reparse_point,5498 .get_srv_inum = smb2_get_srv_inum,5499 .query_file_info = smb2_query_file_info,5500 .set_path_size = smb2_set_path_size,5501 .set_file_size = smb2_set_file_size,5502 .set_file_info = smb2_set_file_info,5503 .set_compression = smb2_set_compression,5504 .mkdir = smb2_mkdir,5505 .mkdir_setinfo = smb2_mkdir_setinfo,5506 .rmdir = smb2_rmdir,5507 .unlink = smb2_unlink,5508 .rename = smb2_rename_path,5509 .create_hardlink = smb2_create_hardlink,5510 .parse_reparse_point = smb2_parse_reparse_point,5511 .query_mf_symlink = smb3_query_mf_symlink,5512 .create_mf_symlink = smb3_create_mf_symlink,5513 .create_reparse_symlink = smb2_create_reparse_symlink,5514 .open = smb2_open_file,5515 .set_fid = smb2_set_fid,5516 .close = smb2_close_file,5517 .close_getattr = smb2_close_getattr,5518 .flush = smb2_flush_file,5519 .async_readv = smb2_async_readv,5520 .async_writev = smb2_async_writev,5521 .sync_read = smb2_sync_read,5522 .sync_write = smb2_sync_write,5523 .query_dir_first = smb2_query_dir_first,5524 .query_dir_next = smb2_query_dir_next,5525 .close_dir = smb2_close_dir,5526 .calc_smb_size = smb2_calc_size,5527 .is_status_pending = smb2_is_status_pending,5528 .is_session_expired = smb2_is_session_expired,5529 .oplock_response = smb2_oplock_response,5530 .queryfs = smb2_queryfs,5531 .mand_lock = smb2_mand_lock,5532 .mand_unlock_range = smb2_unlock_range,5533 .push_mand_locks = smb2_push_mandatory_locks,5534 .get_lease_key = smb2_get_lease_key,5535 .set_lease_key = smb2_set_lease_key,5536 .new_lease_key = smb2_new_lease_key,5537 .generate_signingkey = generate_smb30signingkey,5538 .calc_signature = smb3_calc_signature,5539 .set_integrity = smb3_set_integrity,5540 .is_read_op = smb21_is_read_op,5541 .set_oplock_level = smb3_set_oplock_level,5542 .create_lease_buf = smb3_create_lease_buf,5543 .parse_lease_buf = smb3_parse_lease_buf,5544 .copychunk_range = smb2_copychunk_range,5545 .duplicate_extents = smb2_duplicate_extents,5546 .validate_negotiate = smb3_validate_negotiate,5547 .wp_retry_size = smb2_wp_retry_size,5548 .dir_needs_close = smb2_dir_needs_close,5549 .fallocate = smb3_fallocate,5550 .enum_snapshots = smb3_enum_snapshots,5551 .notify = smb3_notify,5552 .init_transform_rq = smb3_init_transform_rq,5553 .is_transform_hdr = smb3_is_transform_hdr,5554 .receive_transform = smb3_receive_transform,5555 .get_dfs_refer = smb2_get_dfs_refer,5556 .select_sectype = smb2_select_sectype,5557#ifdef CONFIG_CIFS_XATTR5558 .query_all_EAs = smb2_query_eas,5559 .set_EA = smb2_set_ea,5560#endif /* CIFS_XATTR */5561 .get_acl = get_smb2_acl,5562 .get_acl_by_fid = get_smb2_acl_by_fid,5563 .set_acl = set_smb2_acl,5564 .next_header = smb2_next_header,5565 .ioctl_query_info = smb2_ioctl_query_info,5566 .make_node = smb2_make_node,5567 .fiemap = smb3_fiemap,5568 .llseek = smb3_llseek,5569 .is_status_io_timeout = smb2_is_status_io_timeout,5570 .is_network_name_deleted = smb2_is_network_name_deleted,5571};5572 5573struct smb_version_operations smb311_operations = {5574 .compare_fids = smb2_compare_fids,5575 .setup_request = smb2_setup_request,5576 .setup_async_request = smb2_setup_async_request,5577 .check_receive = smb2_check_receive,5578 .add_credits = smb2_add_credits,5579 .set_credits = smb2_set_credits,5580 .get_credits_field = smb2_get_credits_field,5581 .get_credits = smb2_get_credits,5582 .wait_mtu_credits = smb2_wait_mtu_credits,5583 .adjust_credits = smb2_adjust_credits,5584 .get_next_mid = smb2_get_next_mid,5585 .revert_current_mid = smb2_revert_current_mid,5586 .read_data_offset = smb2_read_data_offset,5587 .read_data_length = smb2_read_data_length,5588 .map_error = map_smb2_to_linux_error,5589 .find_mid = smb2_find_mid,5590 .check_message = smb2_check_message,5591 .dump_detail = smb2_dump_detail,5592 .clear_stats = smb2_clear_stats,5593 .print_stats = smb2_print_stats,5594 .dump_share_caps = smb2_dump_share_caps,5595 .is_oplock_break = smb2_is_valid_oplock_break,5596 .handle_cancelled_mid = smb2_handle_cancelled_mid,5597 .downgrade_oplock = smb3_downgrade_oplock,5598 .need_neg = smb2_need_neg,5599 .negotiate = smb2_negotiate,5600 .negotiate_wsize = smb3_negotiate_wsize,5601 .negotiate_rsize = smb3_negotiate_rsize,5602 .sess_setup = SMB2_sess_setup,5603 .logoff = SMB2_logoff,5604 .tree_connect = SMB2_tcon,5605 .tree_disconnect = SMB2_tdis,5606 .qfs_tcon = smb3_qfs_tcon,5607 .query_server_interfaces = SMB3_request_interfaces,5608 .is_path_accessible = smb2_is_path_accessible,5609 .can_echo = smb2_can_echo,5610 .echo = SMB2_echo,5611 .query_path_info = smb2_query_path_info,5612 .query_reparse_point = smb2_query_reparse_point,5613 .get_srv_inum = smb2_get_srv_inum,5614 .query_file_info = smb2_query_file_info,5615 .set_path_size = smb2_set_path_size,5616 .set_file_size = smb2_set_file_size,5617 .set_file_info = smb2_set_file_info,5618 .set_compression = smb2_set_compression,5619 .mkdir = smb2_mkdir,5620 .mkdir_setinfo = smb2_mkdir_setinfo,5621 .posix_mkdir = smb311_posix_mkdir,5622 .rmdir = smb2_rmdir,5623 .unlink = smb2_unlink,5624 .rename = smb2_rename_path,5625 .create_hardlink = smb2_create_hardlink,5626 .parse_reparse_point = smb2_parse_reparse_point,5627 .query_mf_symlink = smb3_query_mf_symlink,5628 .create_mf_symlink = smb3_create_mf_symlink,5629 .create_reparse_symlink = smb2_create_reparse_symlink,5630 .open = smb2_open_file,5631 .set_fid = smb2_set_fid,5632 .close = smb2_close_file,5633 .close_getattr = smb2_close_getattr,5634 .flush = smb2_flush_file,5635 .async_readv = smb2_async_readv,5636 .async_writev = smb2_async_writev,5637 .sync_read = smb2_sync_read,5638 .sync_write = smb2_sync_write,5639 .query_dir_first = smb2_query_dir_first,5640 .query_dir_next = smb2_query_dir_next,5641 .close_dir = smb2_close_dir,5642 .calc_smb_size = smb2_calc_size,5643 .is_status_pending = smb2_is_status_pending,5644 .is_session_expired = smb2_is_session_expired,5645 .oplock_response = smb2_oplock_response,5646 .queryfs = smb311_queryfs,5647 .mand_lock = smb2_mand_lock,5648 .mand_unlock_range = smb2_unlock_range,5649 .push_mand_locks = smb2_push_mandatory_locks,5650 .get_lease_key = smb2_get_lease_key,5651 .set_lease_key = smb2_set_lease_key,5652 .new_lease_key = smb2_new_lease_key,5653 .generate_signingkey = generate_smb311signingkey,5654 .calc_signature = smb3_calc_signature,5655 .set_integrity = smb3_set_integrity,5656 .is_read_op = smb21_is_read_op,5657 .set_oplock_level = smb3_set_oplock_level,5658 .create_lease_buf = smb3_create_lease_buf,5659 .parse_lease_buf = smb3_parse_lease_buf,5660 .copychunk_range = smb2_copychunk_range,5661 .duplicate_extents = smb2_duplicate_extents,5662/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */5663 .wp_retry_size = smb2_wp_retry_size,5664 .dir_needs_close = smb2_dir_needs_close,5665 .fallocate = smb3_fallocate,5666 .enum_snapshots = smb3_enum_snapshots,5667 .notify = smb3_notify,5668 .init_transform_rq = smb3_init_transform_rq,5669 .is_transform_hdr = smb3_is_transform_hdr,5670 .receive_transform = smb3_receive_transform,5671 .get_dfs_refer = smb2_get_dfs_refer,5672 .select_sectype = smb2_select_sectype,5673#ifdef CONFIG_CIFS_XATTR5674 .query_all_EAs = smb2_query_eas,5675 .set_EA = smb2_set_ea,5676#endif /* CIFS_XATTR */5677 .get_acl = get_smb2_acl,5678 .get_acl_by_fid = get_smb2_acl_by_fid,5679 .set_acl = set_smb2_acl,5680 .next_header = smb2_next_header,5681 .ioctl_query_info = smb2_ioctl_query_info,5682 .make_node = smb2_make_node,5683 .fiemap = smb3_fiemap,5684 .llseek = smb3_llseek,5685 .is_status_io_timeout = smb2_is_status_io_timeout,5686 .is_network_name_deleted = smb2_is_network_name_deleted,5687};5688 5689#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY5690struct smb_version_values smb20_values = {5691 .version_string = SMB20_VERSION_STRING,5692 .protocol_id = SMB20_PROT_ID,5693 .req_capabilities = 0, /* MBZ */5694 .large_lock_type = 0,5695 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5696 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5697 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5698 .header_size = sizeof(struct smb2_hdr),5699 .header_preamble_size = 0,5700 .max_header_size = MAX_SMB2_HDR_SIZE,5701 .read_rsp_size = sizeof(struct smb2_read_rsp),5702 .lock_cmd = SMB2_LOCK,5703 .cap_unix = 0,5704 .cap_nt_find = SMB2_NT_FIND,5705 .cap_large_files = SMB2_LARGE_FILES,5706 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5707 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5708 .create_lease_size = sizeof(struct create_lease),5709};5710#endif /* ALLOW_INSECURE_LEGACY */5711 5712struct smb_version_values smb21_values = {5713 .version_string = SMB21_VERSION_STRING,5714 .protocol_id = SMB21_PROT_ID,5715 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */5716 .large_lock_type = 0,5717 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5718 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5719 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5720 .header_size = sizeof(struct smb2_hdr),5721 .header_preamble_size = 0,5722 .max_header_size = MAX_SMB2_HDR_SIZE,5723 .read_rsp_size = sizeof(struct smb2_read_rsp),5724 .lock_cmd = SMB2_LOCK,5725 .cap_unix = 0,5726 .cap_nt_find = SMB2_NT_FIND,5727 .cap_large_files = SMB2_LARGE_FILES,5728 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5729 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5730 .create_lease_size = sizeof(struct create_lease),5731};5732 5733struct smb_version_values smb3any_values = {5734 .version_string = SMB3ANY_VERSION_STRING,5735 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */5736 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,5737 .large_lock_type = 0,5738 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5739 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5740 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5741 .header_size = sizeof(struct smb2_hdr),5742 .header_preamble_size = 0,5743 .max_header_size = MAX_SMB2_HDR_SIZE,5744 .read_rsp_size = sizeof(struct smb2_read_rsp),5745 .lock_cmd = SMB2_LOCK,5746 .cap_unix = 0,5747 .cap_nt_find = SMB2_NT_FIND,5748 .cap_large_files = SMB2_LARGE_FILES,5749 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5750 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5751 .create_lease_size = sizeof(struct create_lease_v2),5752};5753 5754struct smb_version_values smbdefault_values = {5755 .version_string = SMBDEFAULT_VERSION_STRING,5756 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */5757 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,5758 .large_lock_type = 0,5759 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5760 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5761 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5762 .header_size = sizeof(struct smb2_hdr),5763 .header_preamble_size = 0,5764 .max_header_size = MAX_SMB2_HDR_SIZE,5765 .read_rsp_size = sizeof(struct smb2_read_rsp),5766 .lock_cmd = SMB2_LOCK,5767 .cap_unix = 0,5768 .cap_nt_find = SMB2_NT_FIND,5769 .cap_large_files = SMB2_LARGE_FILES,5770 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5771 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5772 .create_lease_size = sizeof(struct create_lease_v2),5773};5774 5775struct smb_version_values smb30_values = {5776 .version_string = SMB30_VERSION_STRING,5777 .protocol_id = SMB30_PROT_ID,5778 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,5779 .large_lock_type = 0,5780 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5781 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5782 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5783 .header_size = sizeof(struct smb2_hdr),5784 .header_preamble_size = 0,5785 .max_header_size = MAX_SMB2_HDR_SIZE,5786 .read_rsp_size = sizeof(struct smb2_read_rsp),5787 .lock_cmd = SMB2_LOCK,5788 .cap_unix = 0,5789 .cap_nt_find = SMB2_NT_FIND,5790 .cap_large_files = SMB2_LARGE_FILES,5791 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5792 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5793 .create_lease_size = sizeof(struct create_lease_v2),5794};5795 5796struct smb_version_values smb302_values = {5797 .version_string = SMB302_VERSION_STRING,5798 .protocol_id = SMB302_PROT_ID,5799 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,5800 .large_lock_type = 0,5801 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5802 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5803 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5804 .header_size = sizeof(struct smb2_hdr),5805 .header_preamble_size = 0,5806 .max_header_size = MAX_SMB2_HDR_SIZE,5807 .read_rsp_size = sizeof(struct smb2_read_rsp),5808 .lock_cmd = SMB2_LOCK,5809 .cap_unix = 0,5810 .cap_nt_find = SMB2_NT_FIND,5811 .cap_large_files = SMB2_LARGE_FILES,5812 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5813 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5814 .create_lease_size = sizeof(struct create_lease_v2),5815};5816 5817struct smb_version_values smb311_values = {5818 .version_string = SMB311_VERSION_STRING,5819 .protocol_id = SMB311_PROT_ID,5820 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,5821 .large_lock_type = 0,5822 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,5823 .shared_lock_type = SMB2_LOCKFLAG_SHARED,5824 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,5825 .header_size = sizeof(struct smb2_hdr),5826 .header_preamble_size = 0,5827 .max_header_size = MAX_SMB2_HDR_SIZE,5828 .read_rsp_size = sizeof(struct smb2_read_rsp),5829 .lock_cmd = SMB2_LOCK,5830 .cap_unix = 0,5831 .cap_nt_find = SMB2_NT_FIND,5832 .cap_large_files = SMB2_LARGE_FILES,5833 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,5834 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,5835 .create_lease_size = sizeof(struct create_lease_v2),5836};5837