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/inet.h> 11 #include <linux/ip.h> 12 #include <net/sock.h> 13 #include <net/tcp.h> 14 #include <net/inet_connection_sock.h> 15 #include <net/request_sock.h> 16 #include <linux/kthread.h> 17 #include <linux/nls.h> 18 #include <linux/unicode.h> 19 #include <linux/workqueue.h> 20 21 #include "smb_common.h" 22 #include "ksmbd_work.h" 23 24 struct smbdirect_buffer_descriptor_v1; 25 26 #define KSMBD_SOCKET_BACKLOG 16 27 28 enum { 29 KSMBD_SESS_NEW = 0, 30 KSMBD_SESS_GOOD, 31 KSMBD_SESS_EXITING, 32 KSMBD_SESS_NEED_RECONNECT, 33 KSMBD_SESS_NEED_NEGOTIATE, 34 KSMBD_SESS_NEED_SETUP, 35 KSMBD_SESS_RELEASING 36 }; 37 38 struct ksmbd_conn_stats { 39 atomic_t open_files_count; 40 atomic64_t request_served; 41 }; 42 43 struct ksmbd_transport; 44 45 struct ksmbd_conn { 46 struct smb_version_values *vals; 47 struct smb_version_ops *ops; 48 struct smb_version_cmds *cmds; 49 unsigned int max_cmds; 50 struct mutex srv_mutex; 51 int status; 52 unsigned int cli_cap; 53 bool stop_called; 54 union { 55 __be32 inet_addr; 56 #if IS_ENABLED(CONFIG_IPV6) 57 u8 inet6_addr[16]; 58 #endif 59 }; 60 unsigned int inet_hash; 61 char *request_buf; 62 struct ksmbd_transport *transport; 63 struct nls_table *local_nls; 64 struct unicode_map *um; 65 struct hlist_node hlist; 66 struct rw_semaphore session_lock; 67 /* smb session 1 per user */ 68 struct xarray sessions; 69 unsigned long last_active; 70 /* How many request are running currently */ 71 atomic_t req_running; 72 /* References which are made for this Server object*/ 73 atomic_t r_count; 74 unsigned int total_credits; 75 unsigned int outstanding_credits; 76 spinlock_t credits_lock; 77 wait_queue_head_t req_running_q; 78 wait_queue_head_t r_count_q; 79 /* Lock to protect requests list*/ 80 spinlock_t request_lock; 81 struct list_head requests; 82 struct list_head async_requests; 83 int connection_type; 84 struct ksmbd_conn_stats stats; 85 char ClientGUID[SMB2_CLIENT_GUID_SIZE]; 86 struct ntlmssp_auth ntlmssp; 87 88 spinlock_t llist_lock; 89 struct list_head lock_list; 90 91 struct preauth_integrity_info *preauth_info; 92 93 bool need_neg; 94 unsigned int auth_mechs; 95 unsigned int preferred_auth_mech; 96 bool sign; 97 bool use_spnego:1; 98 __u16 cli_sec_mode; 99 __u16 srv_sec_mode; 100 /* dialect index that server chose */ 101 __u16 dialect; 102 103 char *mechToken; 104 unsigned int mechTokenLen; 105 106 struct ksmbd_conn_ops *conn_ops; 107 108 /* Preauth Session Table */ 109 struct list_head preauth_sess_table; 110 111 struct sockaddr_storage peer_addr; 112 113 /* Identifier for async message */ 114 struct ida async_ida; 115 116 __le16 cipher_type; 117 __le16 compress_algorithm; 118 /* Negotiated SMB 3.1.1 compression capabilities. */ 119 bool compress_chained; 120 bool compress_pattern; 121 bool posix_ext_supported; 122 bool signing_negotiated; 123 __le16 signing_algorithm; 124 bool binding; 125 atomic_t refcnt; 126 bool is_aapl; 127 struct work_struct release_work; 128 }; 129 130 struct ksmbd_conn_ops { 131 int (*process_fn)(struct ksmbd_conn *conn); 132 int (*terminate_fn)(struct ksmbd_conn *conn); 133 }; 134 135 struct ksmbd_transport_ops { 136 void (*disconnect)(struct ksmbd_transport *t); 137 void (*shutdown)(struct ksmbd_transport *t); 138 int (*read)(struct ksmbd_transport *t, char *buf, 139 unsigned int size, int max_retries); 140 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov, 141 int size, bool need_invalidate_rkey, 142 unsigned int remote_key); 143 int (*rdma_read)(struct ksmbd_transport *t, 144 void *buf, unsigned int len, 145 struct smbdirect_buffer_descriptor_v1 *desc, 146 unsigned int desc_len); 147 int (*rdma_write)(struct ksmbd_transport *t, 148 void *buf, unsigned int len, 149 struct smbdirect_buffer_descriptor_v1 *desc, 150 unsigned int desc_len); 151 void (*free_transport)(struct ksmbd_transport *kt); 152 }; 153 154 struct ksmbd_transport { 155 struct ksmbd_conn *conn; 156 const struct ksmbd_transport_ops *ops; 157 }; 158 159 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ) 160 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ) 161 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr)) 162 163 #define CONN_HASH_BITS 12 164 extern DECLARE_HASHTABLE(conn_list, CONN_HASH_BITS); 165 extern struct rw_semaphore conn_list_lock; 166 167 bool ksmbd_conn_alive(struct ksmbd_conn *conn); 168 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn); 169 int ksmbd_conn_wait_idle_sess_id(struct ksmbd_conn *curr_conn, u64 sess_id); 170 struct ksmbd_conn *ksmbd_conn_alloc(void); 171 void ksmbd_conn_free(struct ksmbd_conn *conn); 172 struct ksmbd_conn *ksmbd_conn_get(struct ksmbd_conn *conn); 173 void ksmbd_conn_put(struct ksmbd_conn *conn); 174 int ksmbd_conn_wq_init(void); 175 void ksmbd_conn_wq_destroy(void); 176 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c); 177 int ksmbd_conn_write(struct ksmbd_work *work); 178 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn, 179 void *buf, unsigned int buflen, 180 struct smbdirect_buffer_descriptor_v1 *desc, 181 unsigned int desc_len); 182 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn, 183 void *buf, unsigned int buflen, 184 struct smbdirect_buffer_descriptor_v1 *desc, 185 unsigned int desc_len); 186 void ksmbd_conn_enqueue_request(struct ksmbd_work *work); 187 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work); 188 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops); 189 int ksmbd_conn_handler_loop(void *p); 190 int ksmbd_conn_transport_init(void); 191 void ksmbd_conn_transport_destroy(void); 192 void ksmbd_conn_lock(struct ksmbd_conn *conn); 193 void ksmbd_conn_unlock(struct ksmbd_conn *conn); 194 void ksmbd_conn_r_count_inc(struct ksmbd_conn *conn); 195 void ksmbd_conn_r_count_dec(struct ksmbd_conn *conn); 196 197 /* 198 * WARNING 199 * 200 * This is a hack. We will move status to a proper place once we land 201 * a multi-sessions support. 202 */ 203 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn) 204 { 205 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD; 206 } 207 208 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn) 209 { 210 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE; 211 } 212 213 static inline bool ksmbd_conn_need_setup(struct ksmbd_conn *conn) 214 { 215 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_SETUP; 216 } 217 218 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn) 219 { 220 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT; 221 } 222 223 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn) 224 { 225 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING; 226 } 227 228 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn) 229 { 230 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING; 231 } 232 233 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn) 234 { 235 WRITE_ONCE(conn->status, KSMBD_SESS_NEW); 236 } 237 238 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn) 239 { 240 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD); 241 } 242 243 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn) 244 { 245 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE); 246 } 247 248 static inline void ksmbd_conn_set_need_setup(struct ksmbd_conn *conn) 249 { 250 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_SETUP); 251 } 252 253 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn) 254 { 255 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT); 256 } 257 258 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn) 259 { 260 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING); 261 } 262 263 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn) 264 { 265 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING); 266 } 267 268 void ksmbd_all_conn_set_status(u64 sess_id, u32 status); 269 #endif /* __CONNECTION_H__ */ 270