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1da177e4 LT |
1 | /* |
2 | * smb_fs.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 _LINUX_SMB_FS_H | |
10 | #define _LINUX_SMB_FS_H | |
11 | ||
12 | #include <linux/smb.h> | |
1da177e4 LT |
13 | |
14 | /* | |
15 | * ioctl commands | |
16 | */ | |
17 | #define SMB_IOC_GETMOUNTUID _IOR('u', 1, __kernel_old_uid_t) | |
18 | #define SMB_IOC_NEWCONN _IOW('u', 2, struct smb_conn_opt) | |
19 | ||
20 | /* __kernel_uid_t can never change, so we have to use __kernel_uid32_t */ | |
21 | #define SMB_IOC_GETMOUNTUID32 _IOR('u', 3, __kernel_uid32_t) | |
22 | ||
23 | ||
24 | #ifdef __KERNEL__ | |
19b3bd66 DW |
25 | #include <linux/smb_fs_i.h> |
26 | #include <linux/smb_fs_sb.h> | |
1da177e4 LT |
27 | |
28 | #include <linux/fs.h> | |
29 | #include <linux/pagemap.h> | |
30 | #include <linux/vmalloc.h> | |
31 | #include <linux/smb_mount.h> | |
32 | #include <asm/unaligned.h> | |
33 | ||
34 | static inline struct smb_sb_info *SMB_SB(struct super_block *sb) | |
35 | { | |
36 | return sb->s_fs_info; | |
37 | } | |
38 | ||
39 | static inline struct smb_inode_info *SMB_I(struct inode *inode) | |
40 | { | |
41 | return container_of(inode, struct smb_inode_info, vfs_inode); | |
42 | } | |
43 | ||
44 | /* macro names are short for word, double-word, long value (?) */ | |
45 | #define WVAL(buf,pos) \ | |
46 | (le16_to_cpu(get_unaligned((u16 *)((u8 *)(buf) + (pos))))) | |
47 | #define DVAL(buf,pos) \ | |
48 | (le32_to_cpu(get_unaligned((u32 *)((u8 *)(buf) + (pos))))) | |
49 | #define LVAL(buf,pos) \ | |
50 | (le64_to_cpu(get_unaligned((u64 *)((u8 *)(buf) + (pos))))) | |
51 | #define WSET(buf,pos,val) \ | |
52 | put_unaligned(cpu_to_le16((u16)(val)), (u16 *)((u8 *)(buf) + (pos))) | |
53 | #define DSET(buf,pos,val) \ | |
54 | put_unaligned(cpu_to_le32((u32)(val)), (u32 *)((u8 *)(buf) + (pos))) | |
55 | #define LSET(buf,pos,val) \ | |
56 | put_unaligned(cpu_to_le64((u64)(val)), (u64 *)((u8 *)(buf) + (pos))) | |
57 | ||
58 | /* where to find the base of the SMB packet proper */ | |
59 | #define smb_base(buf) ((u8 *)(((u8 *)(buf))+4)) | |
60 | ||
1da177e4 LT |
61 | /* |
62 | * Flags for the in-memory inode | |
63 | */ | |
64 | #define SMB_F_LOCALWRITE 0x02 /* file modified locally */ | |
65 | ||
66 | ||
67 | /* NT1 protocol capability bits */ | |
68 | #define SMB_CAP_RAW_MODE 0x00000001 | |
69 | #define SMB_CAP_MPX_MODE 0x00000002 | |
70 | #define SMB_CAP_UNICODE 0x00000004 | |
71 | #define SMB_CAP_LARGE_FILES 0x00000008 | |
72 | #define SMB_CAP_NT_SMBS 0x00000010 | |
73 | #define SMB_CAP_RPC_REMOTE_APIS 0x00000020 | |
74 | #define SMB_CAP_STATUS32 0x00000040 | |
75 | #define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080 | |
76 | #define SMB_CAP_LOCK_AND_READ 0x00000100 | |
77 | #define SMB_CAP_NT_FIND 0x00000200 | |
78 | #define SMB_CAP_DFS 0x00001000 | |
79 | #define SMB_CAP_LARGE_READX 0x00004000 | |
80 | #define SMB_CAP_LARGE_WRITEX 0x00008000 | |
81 | #define SMB_CAP_UNIX 0x00800000 /* unofficial ... */ | |
82 | ||
83 | ||
84 | /* | |
85 | * This is the time we allow an inode, dentry or dir cache to live. It is bad | |
86 | * for performance to have shorter ttl on an inode than on the cache. It can | |
87 | * cause refresh on each inode for a dir listing ... one-by-one | |
88 | */ | |
89 | #define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000) | |
90 | ||
91 | static inline void | |
92 | smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry) | |
93 | { | |
94 | dentry->d_time = jiffies - SMB_MAX_AGE(server); | |
95 | } | |
96 | ||
97 | struct smb_cache_head { | |
98 | time_t mtime; /* unused */ | |
99 | unsigned long time; /* cache age */ | |
100 | unsigned long end; /* last valid fpos in cache */ | |
101 | int eof; | |
102 | }; | |
103 | ||
104 | #define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *))) | |
105 | union smb_dir_cache { | |
106 | struct smb_cache_head head; | |
107 | struct dentry *dentry[SMB_DIRCACHE_SIZE]; | |
108 | }; | |
109 | ||
110 | #define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \ | |
111 | sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \ | |
112 | sizeof(struct dentry *))) | |
113 | ||
114 | #define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE) | |
115 | ||
116 | struct smb_cache_control { | |
117 | struct smb_cache_head head; | |
118 | struct page *page; | |
119 | union smb_dir_cache *cache; | |
120 | unsigned long fpos, ofs; | |
121 | int filled, valid, idx; | |
122 | }; | |
123 | ||
124 | #define SMB_OPS_NUM_STATIC 5 | |
125 | struct smb_ops { | |
126 | int (*read)(struct inode *inode, loff_t offset, int count, | |
127 | char *data); | |
128 | int (*write)(struct inode *inode, loff_t offset, int count, const | |
129 | char *data); | |
130 | int (*readdir)(struct file *filp, void *dirent, filldir_t filldir, | |
131 | struct smb_cache_control *ctl); | |
132 | ||
133 | int (*getattr)(struct smb_sb_info *server, struct dentry *dir, | |
134 | struct smb_fattr *fattr); | |
135 | /* int (*setattr)(...); */ /* setattr is really icky! */ | |
136 | ||
137 | int (*truncate)(struct inode *inode, loff_t length); | |
138 | ||
139 | ||
140 | /* --- --- --- end of "static" entries --- --- --- */ | |
141 | ||
142 | int (*convert)(unsigned char *output, int olen, | |
143 | const unsigned char *input, int ilen, | |
144 | struct nls_table *nls_from, | |
145 | struct nls_table *nls_to); | |
146 | }; | |
147 | ||
148 | static inline int | |
149 | smb_is_open(struct inode *i) | |
150 | { | |
151 | return (SMB_I(i)->open == server_from_inode(i)->generation); | |
152 | } | |
153 | ||
154 | extern void smb_install_null_ops(struct smb_ops *); | |
155 | #endif /* __KERNEL__ */ | |
156 | ||
157 | #endif /* _LINUX_SMB_FS_H */ |