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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
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__
David Woodhouse19b3bd62006-04-25 15:18:05 +010025#include <linux/smb_fs_i.h>
26#include <linux/smb_fs_sb.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28#include <linux/fs.h>
29#include <linux/pagemap.h>
30#include <linux/vmalloc.h>
31#include <linux/smb_mount.h>
Stephen Rothwelld2579052007-05-22 11:10:19 +100032#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/unaligned.h>
34
35static inline struct smb_sb_info *SMB_SB(struct super_block *sb)
36{
37 return sb->s_fs_info;
38}
39
40static 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) \
Al Viro6ca15842005-12-24 14:32:38 -050047 (le16_to_cpu(get_unaligned((__le16 *)((u8 *)(buf) + (pos)))))
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#define DVAL(buf,pos) \
Al Viro6ca15842005-12-24 14:32:38 -050049 (le32_to_cpu(get_unaligned((__le32 *)((u8 *)(buf) + (pos)))))
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define LVAL(buf,pos) \
Al Viro6ca15842005-12-24 14:32:38 -050051 (le64_to_cpu(get_unaligned((__le64 *)((u8 *)(buf) + (pos)))))
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define WSET(buf,pos,val) \
Al Viro6ca15842005-12-24 14:32:38 -050053 put_unaligned(cpu_to_le16((u16)(val)), (__le16 *)((u8 *)(buf) + (pos)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#define DSET(buf,pos,val) \
Al Viro6ca15842005-12-24 14:32:38 -050055 put_unaligned(cpu_to_le32((u32)(val)), (__le32 *)((u8 *)(buf) + (pos)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#define LSET(buf,pos,val) \
Al Viro6ca15842005-12-24 14:32:38 -050057 put_unaligned(cpu_to_le64((u64)(val)), (__le64 *)((u8 *)(buf) + (pos)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59/* where to find the base of the SMB packet proper */
60#define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062/*
63 * Flags for the in-memory inode
64 */
65#define SMB_F_LOCALWRITE 0x02 /* file modified locally */
66
67
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 ... */
83
84
85/*
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
89 */
90#define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000)
91
92static inline void
93smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
94{
95 dentry->d_time = jiffies - SMB_MAX_AGE(server);
96}
97
98struct 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;
103};
104
105#define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
106union smb_dir_cache {
107 struct smb_cache_head head;
108 struct dentry *dentry[SMB_DIRCACHE_SIZE];
109};
110
111#define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \
112 sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \
113 sizeof(struct dentry *)))
114
115#define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE)
116
117struct 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;
123};
124
125#define SMB_OPS_NUM_STATIC 5
126struct 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);
133
134 int (*getattr)(struct smb_sb_info *server, struct dentry *dir,
135 struct smb_fattr *fattr);
136 /* int (*setattr)(...); */ /* setattr is really icky! */
137
138 int (*truncate)(struct inode *inode, loff_t length);
139
140
141 /* --- --- --- end of "static" entries --- --- --- */
142
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);
147};
148
149static inline int
150smb_is_open(struct inode *i)
151{
152 return (SMB_I(i)->open == server_from_inode(i)->generation);
153}
154
155extern void smb_install_null_ops(struct smb_ops *);
156#endif /* __KERNEL__ */
157
158#endif /* _LINUX_SMB_FS_H */