Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux-2.6/verdex.git] / include / linux / smb_fs.h
blob2c5cd55f44fff4ab96bda8b48cd439d4bcf47099
1 /*
2 * smb_fs.h
4 * Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
5 * Copyright (C) 1997 by Volker Lendecke
7 */
9 #ifndef _LINUX_SMB_FS_H
10 #define _LINUX_SMB_FS_H
12 #include <linux/smb.h>
15 * ioctl commands
17 #define SMB_IOC_GETMOUNTUID _IOR('u', 1, __kernel_old_uid_t)
18 #define SMB_IOC_NEWCONN _IOW('u', 2, struct smb_conn_opt)
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)
24 #ifdef __KERNEL__
25 #include <linux/smb_fs_i.h>
26 #include <linux/smb_fs_sb.h>
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>
35 static inline struct smb_sb_info *SMB_SB(struct super_block *sb)
37 return sb->s_fs_info;
40 static inline struct smb_inode_info *SMB_I(struct inode *inode)
42 return container_of(inode, struct smb_inode_info, vfs_inode);
45 /* macro names are short for word, double-word, long value (?) */
46 #define WVAL(buf,pos) \
47 (le16_to_cpu(get_unaligned((__le16 *)((u8 *)(buf) + (pos)))))
48 #define DVAL(buf,pos) \
49 (le32_to_cpu(get_unaligned((__le32 *)((u8 *)(buf) + (pos)))))
50 #define LVAL(buf,pos) \
51 (le64_to_cpu(get_unaligned((__le64 *)((u8 *)(buf) + (pos)))))
52 #define WSET(buf,pos,val) \
53 put_unaligned(cpu_to_le16((u16)(val)), (__le16 *)((u8 *)(buf) + (pos)))
54 #define DSET(buf,pos,val) \
55 put_unaligned(cpu_to_le32((u32)(val)), (__le32 *)((u8 *)(buf) + (pos)))
56 #define LSET(buf,pos,val) \
57 put_unaligned(cpu_to_le64((u64)(val)), (__le64 *)((u8 *)(buf) + (pos)))
59 /* where to find the base of the SMB packet proper */
60 #define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))
63 * Flags for the in-memory inode
65 #define SMB_F_LOCALWRITE 0x02 /* file modified locally */
68 /* NT1 protocol capability bits */
69 #define SMB_CAP_RAW_MODE 0x00000001
70 #define SMB_CAP_MPX_MODE 0x00000002
71 #define SMB_CAP_UNICODE 0x00000004
72 #define SMB_CAP_LARGE_FILES 0x00000008
73 #define SMB_CAP_NT_SMBS 0x00000010
74 #define SMB_CAP_RPC_REMOTE_APIS 0x00000020
75 #define SMB_CAP_STATUS32 0x00000040
76 #define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080
77 #define SMB_CAP_LOCK_AND_READ 0x00000100
78 #define SMB_CAP_NT_FIND 0x00000200
79 #define SMB_CAP_DFS 0x00001000
80 #define SMB_CAP_LARGE_READX 0x00004000
81 #define SMB_CAP_LARGE_WRITEX 0x00008000
82 #define SMB_CAP_UNIX 0x00800000 /* unofficial ... */
86 * This is the time we allow an inode, dentry or dir cache to live. It is bad
87 * for performance to have shorter ttl on an inode than on the cache. It can
88 * cause refresh on each inode for a dir listing ... one-by-one
90 #define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000)
92 static inline void
93 smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
95 dentry->d_time = jiffies - SMB_MAX_AGE(server);
98 struct smb_cache_head {
99 time_t mtime; /* unused */
100 unsigned long time; /* cache age */
101 unsigned long end; /* last valid fpos in cache */
102 int eof;
105 #define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
106 union smb_dir_cache {
107 struct smb_cache_head head;
108 struct dentry *dentry[SMB_DIRCACHE_SIZE];
111 #define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \
112 sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \
113 sizeof(struct dentry *)))
115 #define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE)
117 struct smb_cache_control {
118 struct smb_cache_head head;
119 struct page *page;
120 union smb_dir_cache *cache;
121 unsigned long fpos, ofs;
122 int filled, valid, idx;
125 #define SMB_OPS_NUM_STATIC 5
126 struct smb_ops {
127 int (*read)(struct inode *inode, loff_t offset, int count,
128 char *data);
129 int (*write)(struct inode *inode, loff_t offset, int count, const
130 char *data);
131 int (*readdir)(struct file *filp, void *dirent, filldir_t filldir,
132 struct smb_cache_control *ctl);
134 int (*getattr)(struct smb_sb_info *server, struct dentry *dir,
135 struct smb_fattr *fattr);
136 /* int (*setattr)(...); */ /* setattr is really icky! */
138 int (*truncate)(struct inode *inode, loff_t length);
141 /* --- --- --- end of "static" entries --- --- --- */
143 int (*convert)(unsigned char *output, int olen,
144 const unsigned char *input, int ilen,
145 struct nls_table *nls_from,
146 struct nls_table *nls_to);
149 static inline int
150 smb_is_open(struct inode *i)
152 return (SMB_I(i)->open == server_from_inode(i)->generation);
155 extern void smb_install_null_ops(struct smb_ops *);
156 #endif /* __KERNEL__ */
158 #endif /* _LINUX_SMB_FS_H */