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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Copyright (C) 2018 Samsung Electronics Co., Ltd.4 */5 6#ifndef __KSMBD_CONNECTION_H__7#define __KSMBD_CONNECTION_H__8 9#include <linux/list.h>10#include <linux/ip.h>11#include <net/sock.h>12#include <net/tcp.h>13#include <net/inet_connection_sock.h>14#include <net/request_sock.h>15#include <linux/kthread.h>16#include <linux/nls.h>17#include <linux/unicode.h>18 19#include "smb_common.h"20#include "ksmbd_work.h"21 22#define KSMBD_SOCKET_BACKLOG 1623 24enum {25 KSMBD_SESS_NEW = 0,26 KSMBD_SESS_GOOD,27 KSMBD_SESS_EXITING,28 KSMBD_SESS_NEED_RECONNECT,29 KSMBD_SESS_NEED_NEGOTIATE,30 KSMBD_SESS_RELEASING31};32 33struct ksmbd_stats {34 atomic_t open_files_count;35 atomic64_t request_served;36};37 38struct ksmbd_transport;39 40struct ksmbd_conn {41 struct smb_version_values *vals;42 struct smb_version_ops *ops;43 struct smb_version_cmds *cmds;44 unsigned int max_cmds;45 struct mutex srv_mutex;46 int status;47 unsigned int cli_cap;48 char *request_buf;49 struct ksmbd_transport *transport;50 struct nls_table *local_nls;51 struct unicode_map *um;52 struct list_head conns_list;53 struct rw_semaphore session_lock;54 /* smb session 1 per user */55 struct xarray sessions;56 unsigned long last_active;57 /* How many request are running currently */58 atomic_t req_running;59 /* References which are made for this Server object*/60 atomic_t r_count;61 unsigned int total_credits;62 unsigned int outstanding_credits;63 spinlock_t credits_lock;64 wait_queue_head_t req_running_q;65 wait_queue_head_t r_count_q;66 /* Lock to protect requests list*/67 spinlock_t request_lock;68 struct list_head requests;69 struct list_head async_requests;70 int connection_type;71 struct ksmbd_stats stats;72 char ClientGUID[SMB2_CLIENT_GUID_SIZE];73 struct ntlmssp_auth ntlmssp;74 75 spinlock_t llist_lock;76 struct list_head lock_list;77 78 struct preauth_integrity_info *preauth_info;79 80 bool need_neg;81 unsigned int auth_mechs;82 unsigned int preferred_auth_mech;83 bool sign;84 bool use_spnego:1;85 __u16 cli_sec_mode;86 __u16 srv_sec_mode;87 /* dialect index that server chose */88 __u16 dialect;89 90 char *mechToken;91 unsigned int mechTokenLen;92 93 struct ksmbd_conn_ops *conn_ops;94 95 /* Preauth Session Table */96 struct list_head preauth_sess_table;97 98 struct sockaddr_storage peer_addr;99 100 /* Identifier for async message */101 struct ida async_ida;102 103 __le16 cipher_type;104 __le16 compress_algorithm;105 bool posix_ext_supported;106 bool signing_negotiated;107 __le16 signing_algorithm;108 bool binding;109 atomic_t refcnt;110 atomic_t mux_smb_requests;111};112 113struct ksmbd_conn_ops {114 int (*process_fn)(struct ksmbd_conn *conn);115 int (*terminate_fn)(struct ksmbd_conn *conn);116};117 118struct ksmbd_transport_ops {119 int (*prepare)(struct ksmbd_transport *t);120 void (*disconnect)(struct ksmbd_transport *t);121 void (*shutdown)(struct ksmbd_transport *t);122 int (*read)(struct ksmbd_transport *t, char *buf,123 unsigned int size, int max_retries);124 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov,125 int size, bool need_invalidate_rkey,126 unsigned int remote_key);127 int (*rdma_read)(struct ksmbd_transport *t,128 void *buf, unsigned int len,129 struct smb2_buffer_desc_v1 *desc,130 unsigned int desc_len);131 int (*rdma_write)(struct ksmbd_transport *t,132 void *buf, unsigned int len,133 struct smb2_buffer_desc_v1 *desc,134 unsigned int desc_len);135};136 137struct ksmbd_transport {138 struct ksmbd_conn *conn;139 const struct ksmbd_transport_ops *ops;140};141 142#define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)143#define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)144#define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))145 146extern struct list_head conn_list;147extern struct rw_semaphore conn_list_lock;148 149bool ksmbd_conn_alive(struct ksmbd_conn *conn);150void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);151int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id);152struct ksmbd_conn *ksmbd_conn_alloc(void);153void ksmbd_conn_free(struct ksmbd_conn *conn);154bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);155int ksmbd_conn_write(struct ksmbd_work *work);156int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,157 void *buf, unsigned int buflen,158 struct smb2_buffer_desc_v1 *desc,159 unsigned int desc_len);160int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,161 void *buf, unsigned int buflen,162 struct smb2_buffer_desc_v1 *desc,163 unsigned int desc_len);164void ksmbd_conn_enqueue_request(struct ksmbd_work *work);165void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);166void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);167int ksmbd_conn_handler_loop(void *p);168int ksmbd_conn_transport_init(void);169void ksmbd_conn_transport_destroy(void);170void ksmbd_conn_lock(struct ksmbd_conn *conn);171void ksmbd_conn_unlock(struct ksmbd_conn *conn);172 173/*174 * WARNING175 *176 * This is a hack. We will move status to a proper place once we land177 * a multi-sessions support.178 */179static inline bool ksmbd_conn_good(struct ksmbd_conn *conn)180{181 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD;182}183 184static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn)185{186 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE;187}188 189static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn)190{191 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT;192}193 194static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn)195{196 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING;197}198 199static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn)200{201 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING;202}203 204static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn)205{206 WRITE_ONCE(conn->status, KSMBD_SESS_NEW);207}208 209static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn)210{211 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD);212}213 214static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn)215{216 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE);217}218 219static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn)220{221 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT);222}223 224static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn)225{226 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING);227}228 229static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn)230{231 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING);232}233 234void ksmbd_all_conn_set_status(u64 sess_id, u32 status);235#endif /* __CONNECTION_H__ */236