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>
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__
25 #include <linux/smb_fs_i.h>
26 #include <linux/smb_fs_sb.h>
27
28 #include <linux/fs.h>
29 #include <linux/pagemap.h>
30 #include <linux/vmalloc.h>
31 #include <linux/smb_mount.h>
32 #include <linux/jiffies.h>
33 #include <asm/unaligned.h>
34
SMB_SB(struct super_block * sb)35 static inline struct smb_sb_info *SMB_SB(struct super_block *sb)
36 {
37 return sb->s_fs_info;
38 }
39
SMB_I(struct inode * inode)40 static inline struct smb_inode_info *SMB_I(struct inode *inode)
41 {
42 return container_of(inode, struct smb_inode_info, vfs_inode);
43 }
44
45 /* macro names are short for word, double-word, long value (?) */
46 #define WVAL(buf, pos) (get_unaligned_le16((u8 *)(buf) + (pos)))
47 #define DVAL(buf, pos) (get_unaligned_le32((u8 *)(buf) + (pos)))
48 #define LVAL(buf, pos) (get_unaligned_le64((u8 *)(buf) + (pos)))
49
50 #define WSET(buf, pos, val) put_unaligned_le16((val), (u8 *)(buf) + (pos))
51 #define DSET(buf, pos, val) put_unaligned_le32((val), (u8 *)(buf) + (pos))
52 #define LSET(buf, pos, val) put_unaligned_le64((val), (u8 *)(buf) + (pos))
53
54 /* where to find the base of the SMB packet proper */
55 #define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))
56
57 /*
58 * Flags for the in-memory inode
59 */
60 #define SMB_F_LOCALWRITE 0x02 /* file modified locally */
61
62
63 /* NT1 protocol capability bits */
64 #define SMB_CAP_RAW_MODE 0x00000001
65 #define SMB_CAP_MPX_MODE 0x00000002
66 #define SMB_CAP_UNICODE 0x00000004
67 #define SMB_CAP_LARGE_FILES 0x00000008
68 #define SMB_CAP_NT_SMBS 0x00000010
69 #define SMB_CAP_RPC_REMOTE_APIS 0x00000020
70 #define SMB_CAP_STATUS32 0x00000040
71 #define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080
72 #define SMB_CAP_LOCK_AND_READ 0x00000100
73 #define SMB_CAP_NT_FIND 0x00000200
74 #define SMB_CAP_DFS 0x00001000
75 #define SMB_CAP_LARGE_READX 0x00004000
76 #define SMB_CAP_LARGE_WRITEX 0x00008000
77 #define SMB_CAP_UNIX 0x00800000 /* unofficial ... */
78
79
80 /*
81 * This is the time we allow an inode, dentry or dir cache to live. It is bad
82 * for performance to have shorter ttl on an inode than on the cache. It can
83 * cause refresh on each inode for a dir listing ... one-by-one
84 */
85 #define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000)
86
87 static inline void
smb_age_dentry(struct smb_sb_info * server,struct dentry * dentry)88 smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
89 {
90 dentry->d_time = jiffies - SMB_MAX_AGE(server);
91 }
92
93 struct smb_cache_head {
94 time_t mtime; /* unused */
95 unsigned long time; /* cache age */
96 unsigned long end; /* last valid fpos in cache */
97 int eof;
98 };
99
100 #define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
101 union smb_dir_cache {
102 struct smb_cache_head head;
103 struct dentry *dentry[SMB_DIRCACHE_SIZE];
104 };
105
106 #define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \
107 sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \
108 sizeof(struct dentry *)))
109
110 #define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE)
111
112 struct smb_cache_control {
113 struct smb_cache_head head;
114 struct page *page;
115 union smb_dir_cache *cache;
116 unsigned long fpos, ofs;
117 int filled, valid, idx;
118 };
119
120 #define SMB_OPS_NUM_STATIC 5
121 struct smb_ops {
122 int (*read)(struct inode *inode, loff_t offset, int count,
123 char *data);
124 int (*write)(struct inode *inode, loff_t offset, int count, const
125 char *data);
126 int (*readdir)(struct file *filp, void *dirent, filldir_t filldir,
127 struct smb_cache_control *ctl);
128
129 int (*getattr)(struct smb_sb_info *server, struct dentry *dir,
130 struct smb_fattr *fattr);
131 /* int (*setattr)(...); */ /* setattr is really icky! */
132
133 int (*truncate)(struct inode *inode, loff_t length);
134
135
136 /* --- --- --- end of "static" entries --- --- --- */
137
138 int (*convert)(unsigned char *output, int olen,
139 const unsigned char *input, int ilen,
140 struct nls_table *nls_from,
141 struct nls_table *nls_to);
142 };
143
144 static inline int
smb_is_open(struct inode * i)145 smb_is_open(struct inode *i)
146 {
147 return (SMB_I(i)->open == server_from_inode(i)->generation);
148 }
149
150 extern void smb_install_null_ops(struct smb_ops *);
151 #endif /* __KERNEL__ */
152
153 #endif /* _LINUX_SMB_FS_H */
154