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 16 23 24 enum { 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_RELEASING 31 }; 32 33 struct ksmbd_stats { 34 atomic_t open_files_count; 35 atomic64_t request_served; 36 }; 37 38 struct ksmbd_transport; 39 40 struct 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 }; 111 112 struct ksmbd_conn_ops { 113 int (*process_fn)(struct ksmbd_conn *conn); 114 int (*terminate_fn)(struct ksmbd_conn *conn); 115 }; 116 117 struct ksmbd_transport_ops { 118 int (*prepare)(struct ksmbd_transport *t); 119 void (*disconnect)(struct ksmbd_transport *t); 120 void (*shutdown)(struct ksmbd_transport *t); 121 int (*read)(struct ksmbd_transport *t, char *buf, 122 unsigned int size, int max_retries); 123 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov, 124 int size, bool need_invalidate_rkey, 125 unsigned int remote_key); 126 int (*rdma_read)(struct ksmbd_transport *t, 127 void *buf, unsigned int len, 128 struct smb2_buffer_desc_v1 *desc, 129 unsigned int desc_len); 130 int (*rdma_write)(struct ksmbd_transport *t, 131 void *buf, unsigned int len, 132 struct smb2_buffer_desc_v1 *desc, 133 unsigned int desc_len); 134 }; 135 136 struct ksmbd_transport { 137 struct ksmbd_conn *conn; 138 struct ksmbd_transport_ops *ops; 139 }; 140 141 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ) 142 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ) 143 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr)) 144 145 extern struct list_head conn_list; 146 extern struct rw_semaphore conn_list_lock; 147 148 bool ksmbd_conn_alive(struct ksmbd_conn *conn); 149 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn); 150 int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id); 151 struct ksmbd_conn *ksmbd_conn_alloc(void); 152 void ksmbd_conn_free(struct ksmbd_conn *conn); 153 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c); 154 int ksmbd_conn_write(struct ksmbd_work *work); 155 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn, 156 void *buf, unsigned int buflen, 157 struct smb2_buffer_desc_v1 *desc, 158 unsigned int desc_len); 159 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn, 160 void *buf, unsigned int buflen, 161 struct smb2_buffer_desc_v1 *desc, 162 unsigned int desc_len); 163 void ksmbd_conn_enqueue_request(struct ksmbd_work *work); 164 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work); 165 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops); 166 int ksmbd_conn_handler_loop(void *p); 167 int ksmbd_conn_transport_init(void); 168 void ksmbd_conn_transport_destroy(void); 169 void ksmbd_conn_lock(struct ksmbd_conn *conn); 170 void ksmbd_conn_unlock(struct ksmbd_conn *conn); 171 172 /* 173 * WARNING 174 * 175 * This is a hack. We will move status to a proper place once we land 176 * a multi-sessions support. 177 */ 178 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn) 179 { 180 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD; 181 } 182 183 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn) 184 { 185 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE; 186 } 187 188 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn) 189 { 190 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT; 191 } 192 193 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn) 194 { 195 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING; 196 } 197 198 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn) 199 { 200 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING; 201 } 202 203 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn) 204 { 205 WRITE_ONCE(conn->status, KSMBD_SESS_NEW); 206 } 207 208 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn) 209 { 210 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD); 211 } 212 213 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn) 214 { 215 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE); 216 } 217 218 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn) 219 { 220 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT); 221 } 222 223 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn) 224 { 225 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING); 226 } 227 228 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn) 229 { 230 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING); 231 } 232 233 void ksmbd_all_conn_set_status(u64 sess_id, u32 status); 234 #endif /* __CONNECTION_H__ */ 235