1 /*
2 * smb_fs_sb.h
3 *
4 * Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
5 * Copyright (C) 1997 by Volker Lendecke
6 *
7 */
8
9 #ifndef _SMB_FS_SB
10 #define _SMB_FS_SB
11
12 #include <linux/types.h>
13 #include <linux/smb.h>
14
15 /*
16 * Upper limit on the total number of active smb_request structs.
17 */
18 #define MAX_REQUEST_HARD 256
19
20 enum smb_receive_state {
21 SMB_RECV_START, /* No data read, looking for length + sig */
22 SMB_RECV_HEADER, /* Reading the header data */
23 SMB_RECV_HCOMPLETE, /* Done with the header */
24 SMB_RECV_PARAM, /* Reading parameter words */
25 SMB_RECV_DATA, /* Reading data bytes */
26 SMB_RECV_END, /* End of request */
27 SMB_RECV_DROP, /* Dropping this SMB */
28 SMB_RECV_REQUEST, /* Received a request and not a reply */
29 };
30
31 /* structure access macros */
32 #define server_from_inode(inode) SMB_SB((inode)->i_sb)
33 #define server_from_dentry(dentry) SMB_SB((dentry)->d_sb)
34 #define SB_of(server) ((server)->super_block)
35
36 struct smb_sb_info {
37 /* List of all smbfs superblocks */
38 struct list_head entry;
39
40 enum smb_conn_state state;
41 struct file * sock_file;
42 int conn_error;
43 enum smb_receive_state rstate;
44
45 atomic_t nr_requests;
46 struct list_head xmitq;
47 struct list_head recvq;
48 u16 mid;
49
50 struct smb_mount_data_kernel *mnt;
51
52 /* Connections are counted. Each time a new socket arrives,
53 * generation is incremented.
54 */
55 unsigned int generation;
56 struct pid *conn_pid;
57 struct smb_conn_opt opt;
58 wait_queue_head_t conn_wq;
59 int conn_complete;
60 struct semaphore sem;
61
62 unsigned char header[SMB_HEADER_LEN + 20*2 + 2];
63 u32 header_len;
64 u32 smb_len;
65 u32 smb_read;
66
67 /* We use our own data_ready callback, but need the original one */
68 void *data_ready;
69
70 /* nls pointers for codepage conversions */
71 struct nls_table *remote_nls;
72 struct nls_table *local_nls;
73
74 struct smb_ops *ops;
75
76 struct super_block *super_block;
77 };
78
79 static inline int
smb_lock_server_interruptible(struct smb_sb_info * server)80 smb_lock_server_interruptible(struct smb_sb_info *server)
81 {
82 return down_interruptible(&(server->sem));
83 }
84
85 static inline void
smb_lock_server(struct smb_sb_info * server)86 smb_lock_server(struct smb_sb_info *server)
87 {
88 down(&(server->sem));
89 }
90
91 static inline void
smb_unlock_server(struct smb_sb_info * server)92 smb_unlock_server(struct smb_sb_info *server)
93 {
94 up(&(server->sem));
95 }
96
97 #endif
98