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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/backing-dev.h> |
14 | #include <linux/smb.h> |
15 | |
16 | /* |
17 | * Upper limit on the total number of active smb_request structs. |
18 | */ |
19 | #define MAX_REQUEST_HARD 256 |
20 | |
21 | enum smb_receive_state { |
22 | SMB_RECV_START, /* No data read, looking for length + sig */ |
23 | SMB_RECV_HEADER, /* Reading the header data */ |
24 | SMB_RECV_HCOMPLETE, /* Done with the header */ |
25 | SMB_RECV_PARAM, /* Reading parameter words */ |
26 | SMB_RECV_DATA, /* Reading data bytes */ |
27 | SMB_RECV_END, /* End of request */ |
28 | SMB_RECV_DROP, /* Dropping this SMB */ |
29 | SMB_RECV_REQUEST, /* Received a request and not a reply */ |
30 | }; |
31 | |
32 | /* structure access macros */ |
33 | #define server_from_inode(inode) SMB_SB((inode)->i_sb) |
34 | #define server_from_dentry(dentry) SMB_SB((dentry)->d_sb) |
35 | #define SB_of(server) ((server)->super_block) |
36 | |
37 | struct smb_sb_info { |
38 | /* List of all smbfs superblocks */ |
39 | struct list_head entry; |
40 | |
41 | enum smb_conn_state state; |
42 | struct file * sock_file; |
43 | int conn_error; |
44 | enum smb_receive_state rstate; |
45 | |
46 | atomic_t nr_requests; |
47 | struct list_head xmitq; |
48 | struct list_head recvq; |
49 | u16 mid; |
50 | |
51 | struct smb_mount_data_kernel *mnt; |
52 | |
53 | /* Connections are counted. Each time a new socket arrives, |
54 | * generation is incremented. |
55 | */ |
56 | unsigned int generation; |
57 | struct pid *conn_pid; |
58 | struct smb_conn_opt opt; |
59 | wait_queue_head_t conn_wq; |
60 | int conn_complete; |
61 | struct semaphore sem; |
62 | |
63 | unsigned char header[SMB_HEADER_LEN + 20*2 + 2]; |
64 | u32 header_len; |
65 | u32 smb_len; |
66 | u32 smb_read; |
67 | |
68 | /* We use our own data_ready callback, but need the original one */ |
69 | void *data_ready; |
70 | |
71 | /* nls pointers for codepage conversions */ |
72 | struct nls_table *remote_nls; |
73 | struct nls_table *local_nls; |
74 | |
75 | struct smb_ops *ops; |
76 | |
77 | struct super_block *super_block; |
78 | |
79 | struct backing_dev_info bdi; |
80 | }; |
81 | |
82 | static inline int |
83 | smb_lock_server_interruptible(struct smb_sb_info *server) |
84 | { |
85 | return down_interruptible(&(server->sem)); |
86 | } |
87 | |
88 | static inline void |
89 | smb_lock_server(struct smb_sb_info *server) |
90 | { |
91 | down(&(server->sem)); |
92 | } |
93 | |
94 | static inline void |
95 | smb_unlock_server(struct smb_sb_info *server) |
96 | { |
97 | up(&(server->sem)); |
98 | } |
99 | |
100 | #endif |
101 |
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