1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
6 #ifndef __KSMBD_CONNECTION_H__
7 #define __KSMBD_CONNECTION_H__
9 #include <linux/list.h>
13 #include <net/inet_connection_sock.h>
14 #include <net/request_sock.h>
15 #include <linux/kthread.h>
16 #include <linux/nls.h>
18 #include "smb_common.h"
19 #include "ksmbd_work.h"
21 #define KSMBD_SOCKET_BACKLOG 16
26 * This is nothing but a HACK. Session status should move to channel
27 * or to session. As of now we have 1 tcp_conn : 1 ksmbd_session, but
28 * we need to change it to 1 tcp_conn : N ksmbd_sessions.
34 KSMBD_SESS_NEED_RECONNECT,
35 KSMBD_SESS_NEED_NEGOTIATE
39 atomic_t open_files_count;
40 atomic64_t request_served;
43 struct ksmbd_transport;
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;
54 struct ksmbd_transport *transport;
55 struct nls_table *local_nls;
56 struct list_head conns_list;
57 /* smb session 1 per user */
58 struct list_head sessions;
59 unsigned long last_active;
60 /* How many request are running currently */
62 /* References which are made for this Server object*/
64 unsigned int total_credits;
65 unsigned int outstanding_credits;
66 spinlock_t credits_lock;
67 wait_queue_head_t req_running_q;
68 /* Lock to protect requests list*/
69 spinlock_t request_lock;
70 struct list_head requests;
71 struct list_head async_requests;
73 struct ksmbd_stats stats;
74 char ClientGUID[SMB2_CLIENT_GUID_SIZE];
75 struct ntlmssp_auth ntlmssp;
77 spinlock_t llist_lock;
78 struct list_head lock_list;
80 struct preauth_integrity_info *preauth_info;
83 unsigned int auth_mechs;
84 unsigned int preferred_auth_mech;
89 /* dialect index that server chose */
94 struct ksmbd_conn_ops *conn_ops;
96 /* Preauth Session Table */
97 struct list_head preauth_sess_table;
99 struct sockaddr_storage peer_addr;
101 /* Identifier for async message */
102 struct ida async_ida;
105 __le16 compress_algorithm;
106 bool posix_ext_supported;
107 bool signing_negotiated;
108 __le16 signing_algorithm;
112 struct ksmbd_conn_ops {
113 int (*process_fn)(struct ksmbd_conn *conn);
114 int (*terminate_fn)(struct ksmbd_conn *conn);
117 struct ksmbd_transport_ops {
118 int (*prepare)(struct ksmbd_transport *t);
119 void (*disconnect)(struct ksmbd_transport *t);
120 void (*shutdown)(struct ksmbd_transport *t);
121 int (*read)(struct ksmbd_transport *t, char *buf, unsigned int size);
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, void *buf, unsigned int len,
126 u32 remote_key, u64 remote_offset, u32 remote_len);
127 int (*rdma_write)(struct ksmbd_transport *t, void *buf,
128 unsigned int len, u32 remote_key, u64 remote_offset,
132 struct ksmbd_transport {
133 struct ksmbd_conn *conn;
134 struct ksmbd_transport_ops *ops;
135 struct task_struct *handler;
138 #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ)
139 #define KSMBD_TCP_SEND_TIMEOUT (5 * HZ)
140 #define KSMBD_TCP_PEER_SOCKADDR(c) ((struct sockaddr *)&((c)->peer_addr))
142 extern struct list_head conn_list;
143 extern rwlock_t conn_list_lock;
145 bool ksmbd_conn_alive(struct ksmbd_conn *conn);
146 void ksmbd_conn_wait_idle(struct ksmbd_conn *conn);
147 struct ksmbd_conn *ksmbd_conn_alloc(void);
148 void ksmbd_conn_free(struct ksmbd_conn *conn);
149 bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c);
150 int ksmbd_conn_write(struct ksmbd_work *work);
151 int ksmbd_conn_rdma_read(struct ksmbd_conn *conn, void *buf,
152 unsigned int buflen, u32 remote_key, u64 remote_offset,
154 int ksmbd_conn_rdma_write(struct ksmbd_conn *conn, void *buf,
155 unsigned int buflen, u32 remote_key, u64 remote_offset,
157 void ksmbd_conn_enqueue_request(struct ksmbd_work *work);
158 int ksmbd_conn_try_dequeue_request(struct ksmbd_work *work);
159 void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops);
160 int ksmbd_conn_handler_loop(void *p);
161 int ksmbd_conn_transport_init(void);
162 void ksmbd_conn_transport_destroy(void);
167 * This is a hack. We will move status to a proper place once we land
168 * a multi-sessions support.
170 static inline bool ksmbd_conn_good(struct ksmbd_work *work)
172 return work->conn->status == KSMBD_SESS_GOOD;
175 static inline bool ksmbd_conn_need_negotiate(struct ksmbd_work *work)
177 return work->conn->status == KSMBD_SESS_NEED_NEGOTIATE;
180 static inline bool ksmbd_conn_need_reconnect(struct ksmbd_work *work)
182 return work->conn->status == KSMBD_SESS_NEED_RECONNECT;
185 static inline bool ksmbd_conn_exiting(struct ksmbd_work *work)
187 return work->conn->status == KSMBD_SESS_EXITING;
190 static inline void ksmbd_conn_set_good(struct ksmbd_work *work)
192 work->conn->status = KSMBD_SESS_GOOD;
195 static inline void ksmbd_conn_set_need_negotiate(struct ksmbd_work *work)
197 work->conn->status = KSMBD_SESS_NEED_NEGOTIATE;
200 static inline void ksmbd_conn_set_need_reconnect(struct ksmbd_work *work)
202 work->conn->status = KSMBD_SESS_NEED_RECONNECT;
205 static inline void ksmbd_conn_set_exiting(struct ksmbd_work *work)
207 work->conn->status = KSMBD_SESS_EXITING;
209 #endif /* __CONNECTION_H__ */