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
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) \
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)))
58
59/* where to find the base of the SMB packet proper */
60#define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))
61
62/*
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 */
159