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 }; 110 111 struct ksmbd_conn_ops { 112 int (*process_fn)(struct ksmbd_conn *conn); 113 int (*terminate_fn)(struct ksmbd_conn *conn); 114 }; 115 116 struct ksmbd_transport_ops { 117 int (*prepare)(struct ksmbd_transport *t); 118 void (*disconnect)(struct ksmbd_transport *t); 119 void (*shutdown)(struct ksmbd_transport *t); 120 int (*read)(struct ksmbd_transport *t, char *buf, 121 unsigned int size, int max_retries); 122 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov, 123 int size, bool need_invalidate_rkey, 124 unsigned int remote_key); 125 int (*rdma_read)(struct ksmbd_transport *t, 126 void *buf, unsigned int len, 127 struct smb2_buffer_desc_v1 *desc, 128 unsigned int desc_len); 129 int (*rdma_write)(struct ksmbd_transport *t, 130 void *buf, unsigned int len, 131 struct smb2_buffer_desc_v1 *desc, 132 unsigned int desc_len); 133 }; 134 135 struct ksmbd_transport { 136 struct ksmbd_conn *conn; 137 const struct ksmbd_transport_ops *ops; 138 }; 139 140 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ) 141 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ) 142 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr)) 143 144 extern struct list_head conn_list; 145 extern struct rw_semaphore conn_list_lock; 146 147 bool ksmbd_conn_alive(struct ksmbd_conn *conn); 148 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn, u64 sess_id); 149 struct ksmbd_conn *ksmbd_conn_alloc(void); 150 void ksmbd_conn_free(struct ksmbd_conn *conn); 151 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c); 152 int ksmbd_conn_write(struct ksmbd_work *work); 153 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn, 154 void *buf, unsigned int buflen, 155 struct smb2_buffer_desc_v1 *desc, 156 unsigned int desc_len); 157 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn, 158 void *buf, unsigned int buflen, 159 struct smb2_buffer_desc_v1 *desc, 160 unsigned int desc_len); 161 void ksmbd_conn_enqueue_request(struct ksmbd_work *work); 162 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work); 163 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops); 164 int ksmbd_conn_handler_loop(void *p); 165 int ksmbd_conn_transport_init(void); 166 void ksmbd_conn_transport_destroy(void); 167 void ksmbd_conn_lock(struct ksmbd_conn *conn); 168 void ksmbd_conn_unlock(struct ksmbd_conn *conn); 169 170 /* 171 * WARNING 172 * 173 * This is a hack. We will move status to a proper place once we land 174 * a multi-sessions support. 175 */ 176 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn) 177 { 178 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD; 179 } 180 181 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn) 182 { 183 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE; 184 } 185 186 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn) 187 { 188 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT; 189 } 190 191 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn) 192 { 193 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING; 194 } 195 196 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn) 197 { 198 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING; 199 } 200 201 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn) 202 { 203 WRITE_ONCE(conn->status, KSMBD_SESS_NEW); 204 } 205 206 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn) 207 { 208 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD); 209 } 210 211 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn) 212 { 213 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE); 214 } 215 216 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn) 217 { 218 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT); 219 } 220 221 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn) 222 { 223 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING); 224 } 225 226 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn) 227 { 228 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING); 229 } 230 231 void ksmbd_all_conn_set_status(u64 sess_id, u32 status); 232 #endif /* __CONNECTION_H__ */ 233