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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 <asm/unaligned.h>
33
34static inline struct smb_sb_info *SMB_SB(struct super_block *sb)
35{
36 return sb->s_fs_info;
37}
38
39static 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((__le16 *)((u8 *)(buf) + (pos)))))
47#define DVAL(buf,pos) \
48 (le32_to_cpu(get_unaligned((__le32 *)((u8 *)(buf) + (pos)))))
49#define LVAL(buf,pos) \
50 (le64_to_cpu(get_unaligned((__le64 *)((u8 *)(buf) + (pos)))))
51#define WSET(buf,pos,val) \
52 put_unaligned(cpu_to_le16((u16)(val)), (__le16 *)((u8 *)(buf) + (pos)))
53#define DSET(buf,pos,val) \
54 put_unaligned(cpu_to_le32((u32)(val)), (__le32 *)((u8 *)(buf) + (pos)))
55#define LSET(buf,pos,val) \
56 put_unaligned(cpu_to_le64((u64)(val)), (__le64 *)((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
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
91static inline void
92smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
93{
94 dentry->d_time = jiffies - SMB_MAX_AGE(server);
95}
96
97struct 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 *)))
105union 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
116struct 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
125struct 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
148static inline int
149smb_is_open(struct inode *i)
150{
151 return (SMB_I(i)->open == server_from_inode(i)->generation);
152}
153
154extern void smb_install_null_ops(struct smb_ops *);
155#endif /* __KERNEL__ */
156
157#endif /* _LINUX_SMB_FS_H */