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 /* smb session 1 per user */ 54 struct xarray sessions; 55 unsigned long last_active; 56 /* How many request are running currently */ 57 atomic_t req_running; 58 /* References which are made for this Server object*/ 59 atomic_t r_count; 60 unsigned int total_credits; 61 unsigned int outstanding_credits; 62 spinlock_t credits_lock; 63 wait_queue_head_t req_running_q; 64 wait_queue_head_t r_count_q; 65 /* Lock to protect requests list*/ 66 spinlock_t request_lock; 67 struct list_head requests; 68 struct list_head async_requests; 69 int connection_type; 70 struct ksmbd_stats stats; 71 char ClientGUID[SMB2_CLIENT_GUID_SIZE]; 72 struct ntlmssp_auth ntlmssp; 73 74 spinlock_t llist_lock; 75 struct list_head lock_list; 76 77 struct preauth_integrity_info *preauth_info; 78 79 bool need_neg; 80 unsigned int auth_mechs; 81 unsigned int preferred_auth_mech; 82 bool sign; 83 bool use_spnego:1; 84 __u16 cli_sec_mode; 85 __u16 srv_sec_mode; 86 /* dialect index that server chose */ 87 __u16 dialect; 88 89 char *mechToken; 90 91 struct ksmbd_conn_ops *conn_ops; 92 93 /* Preauth Session Table */ 94 struct list_head preauth_sess_table; 95 96 struct sockaddr_storage peer_addr; 97 98 /* Identifier for async message */ 99 struct ida async_ida; 100 101 __le16 cipher_type; 102 __le16 compress_algorithm; 103 bool posix_ext_supported; 104 bool signing_negotiated; 105 __le16 signing_algorithm; 106 bool binding; 107 }; 108 109 struct ksmbd_conn_ops { 110 int (*process_fn)(struct ksmbd_conn *conn); 111 int (*terminate_fn)(struct ksmbd_conn *conn); 112 }; 113 114 struct ksmbd_transport_ops { 115 int (*prepare)(struct ksmbd_transport *t); 116 void (*disconnect)(struct ksmbd_transport *t); 117 void (*shutdown)(struct ksmbd_transport *t); 118 int (*read)(struct ksmbd_transport *t, char *buf, 119 unsigned int size, int max_retries); 120 int (*writev)(struct ksmbd_transport *t, struct kvec *iovs, int niov, 121 int size, bool need_invalidate_rkey, 122 unsigned int remote_key); 123 int (*rdma_read)(struct ksmbd_transport *t, 124 void *buf, unsigned int len, 125 struct smb2_buffer_desc_v1 *desc, 126 unsigned int desc_len); 127 int (*rdma_write)(struct ksmbd_transport *t, 128 void *buf, unsigned int len, 129 struct smb2_buffer_desc_v1 *desc, 130 unsigned int desc_len); 131 }; 132 133 struct ksmbd_transport { 134 struct ksmbd_conn *conn; 135 struct ksmbd_transport_ops *ops; 136 struct task_struct *handler; 137 }; 138 139 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ) 140 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ) 141 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr)) 142 143 extern struct list_head conn_list; 144 extern struct rw_semaphore conn_list_lock; 145 146 bool ksmbd_conn_alive(struct ksmbd_conn *conn); 147 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn, u64 sess_id); 148 struct ksmbd_conn *ksmbd_conn_alloc(void); 149 void ksmbd_conn_free(struct ksmbd_conn *conn); 150 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c); 151 int ksmbd_conn_write(struct ksmbd_work *work); 152 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn, 153 void *buf, unsigned int buflen, 154 struct smb2_buffer_desc_v1 *desc, 155 unsigned int desc_len); 156 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn, 157 void *buf, unsigned int buflen, 158 struct smb2_buffer_desc_v1 *desc, 159 unsigned int desc_len); 160 void ksmbd_conn_enqueue_request(struct ksmbd_work *work); 161 void ksmbd_conn_try_dequeue_request(struct ksmbd_work *work); 162 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops); 163 int ksmbd_conn_handler_loop(void *p); 164 int ksmbd_conn_transport_init(void); 165 void ksmbd_conn_transport_destroy(void); 166 void ksmbd_conn_lock(struct ksmbd_conn *conn); 167 void ksmbd_conn_unlock(struct ksmbd_conn *conn); 168 169 /* 170 * WARNING 171 * 172 * This is a hack. We will move status to a proper place once we land 173 * a multi-sessions support. 174 */ 175 static inline bool ksmbd_conn_good(struct ksmbd_conn *conn) 176 { 177 return READ_ONCE(conn->status) == KSMBD_SESS_GOOD; 178 } 179 180 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_conn *conn) 181 { 182 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_NEGOTIATE; 183 } 184 185 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_conn *conn) 186 { 187 return READ_ONCE(conn->status) == KSMBD_SESS_NEED_RECONNECT; 188 } 189 190 static inline bool ksmbd_conn_exiting(struct ksmbd_conn *conn) 191 { 192 return READ_ONCE(conn->status) == KSMBD_SESS_EXITING; 193 } 194 195 static inline bool ksmbd_conn_releasing(struct ksmbd_conn *conn) 196 { 197 return READ_ONCE(conn->status) == KSMBD_SESS_RELEASING; 198 } 199 200 static inline void ksmbd_conn_set_new(struct ksmbd_conn *conn) 201 { 202 WRITE_ONCE(conn->status, KSMBD_SESS_NEW); 203 } 204 205 static inline void ksmbd_conn_set_good(struct ksmbd_conn *conn) 206 { 207 WRITE_ONCE(conn->status, KSMBD_SESS_GOOD); 208 } 209 210 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_conn *conn) 211 { 212 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_NEGOTIATE); 213 } 214 215 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_conn *conn) 216 { 217 WRITE_ONCE(conn->status, KSMBD_SESS_NEED_RECONNECT); 218 } 219 220 static inline void ksmbd_conn_set_exiting(struct ksmbd_conn *conn) 221 { 222 WRITE_ONCE(conn->status, KSMBD_SESS_EXITING); 223 } 224 225 static inline void ksmbd_conn_set_releasing(struct ksmbd_conn *conn) 226 { 227 WRITE_ONCE(conn->status, KSMBD_SESS_RELEASING); 228 } 229 230 void ksmbd_all_conn_set_status(u64 sess_id, u32 status); 231 #endif /* __CONNECTION_H__ */ 232