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