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