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
26 #include <linux/pagemap.h>
27 #include <linux/vmalloc.h>
28 #include <linux/smb_mount.h>
29 #include <asm/unaligned.h>
30
31
32 /* macro names are short for word, double-word, long value (?) */
33 #define WVAL(buf,pos) \
34 (le16_to_cpu(get_unaligned((u16 *)((u8 *)(buf) + (pos)))))
35 #define DVAL(buf,pos) \
36 (le32_to_cpu(get_unaligned((u32 *)((u8 *)(buf) + (pos)))))
37 #define LVAL(buf,pos) \
38 (le64_to_cpu(get_unaligned((u64 *)((u8 *)(buf) + (pos)))))
39 #define WSET(buf,pos,val) \
40 put_unaligned(cpu_to_le16((u16)(val)), (u16 *)((u8 *)(buf) + (pos)))
41 #define DSET(buf,pos,val) \
42 put_unaligned(cpu_to_le32((u32)(val)), (u32 *)((u8 *)(buf) + (pos)))
43 #define LSET(buf,pos,val) \
44 put_unaligned(cpu_to_le64((u64)(val)), (u64 *)((u8 *)(buf) + (pos)))
45
46 /* where to find the base of the SMB packet proper */
47 #define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))
48
49 #ifdef DEBUG_SMB_MALLOC
50
51 #include <linux/slab.h>
52
53 extern int smb_malloced;
54 extern int smb_current_vmalloced;
55 extern int smb_current_kmalloced;
56
57 static inline void *
smb_vmalloc(unsigned int size)58 smb_vmalloc(unsigned int size)
59 {
60 smb_malloced += 1;
61 smb_current_vmalloced += 1;
62 return vmalloc(size);
63 }
64
65 static inline void
smb_vfree(void * obj)66 smb_vfree(void *obj)
67 {
68 smb_current_vmalloced -= 1;
69 vfree(obj);
70 }
71
72 static inline void *
smb_kmalloc(size_t size,int flags)73 smb_kmalloc(size_t size, int flags)
74 {
75 smb_malloced += 1;
76 smb_current_kmalloced += 1;
77 return kmalloc(size, flags);
78 }
79
80 static inline void
smb_kfree(void * obj)81 smb_kfree(void *obj)
82 {
83 smb_current_kmalloced -= 1;
84 kfree(obj);
85 }
86
87 #else /* DEBUG_SMB_MALLOC */
88
89 #define smb_kmalloc(s,p) kmalloc(s,p)
90 #define smb_kfree(o) kfree(o)
91 #define smb_vmalloc(s) vmalloc(s)
92 #define smb_vfree(o) vfree(o)
93
94 #endif /* DEBUG_SMB_MALLOC */
95
96 /*
97 * Flags for the in-memory inode
98 */
99 #define SMB_F_LOCALWRITE 0x02 /* file modified locally */
100
101
102 /* NT1 protocol capability bits */
103 #define SMB_CAP_RAW_MODE 0x00000001
104 #define SMB_CAP_MPX_MODE 0x00000002
105 #define SMB_CAP_UNICODE 0x00000004
106 #define SMB_CAP_LARGE_FILES 0x00000008
107 #define SMB_CAP_NT_SMBS 0x00000010
108 #define SMB_CAP_RPC_REMOTE_APIS 0x00000020
109 #define SMB_CAP_STATUS32 0x00000040
110 #define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080
111 #define SMB_CAP_LOCK_AND_READ 0x00000100
112 #define SMB_CAP_NT_FIND 0x00000200
113 #define SMB_CAP_DFS 0x00001000
114 #define SMB_CAP_LARGE_READX 0x00004000
115 #define SMB_CAP_LARGE_WRITEX 0x00008000
116 #define SMB_CAP_UNIX 0x00800000 /* unofficial ... */
117
118
119 /*
120 * This is the time we allow an inode, dentry or dir cache to live. It is bad
121 * for performance to have shorter ttl on an inode than on the cache. It can
122 * cause refresh on each inode for a dir listing ... one-by-one
123 */
124 #define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000)
125
126 static inline void
smb_age_dentry(struct smb_sb_info * server,struct dentry * dentry)127 smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
128 {
129 dentry->d_time = jiffies - SMB_MAX_AGE(server);
130 }
131
132 struct smb_cache_head {
133 time_t mtime; /* unused */
134 unsigned long time; /* cache age */
135 unsigned long end; /* last valid fpos in cache */
136 int eof;
137 };
138
139 #define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
140 union smb_dir_cache {
141 struct smb_cache_head head;
142 struct dentry *dentry[SMB_DIRCACHE_SIZE];
143 };
144
145 #define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \
146 sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \
147 sizeof(struct dentry *)))
148
149 #define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE)
150
151 struct smb_cache_control {
152 struct smb_cache_head head;
153 struct page *page;
154 union smb_dir_cache *cache;
155 unsigned long fpos, ofs;
156 int filled, valid, idx;
157 };
158
159 static inline int
smb_is_open(struct inode * i)160 smb_is_open(struct inode *i)
161 {
162 return (i->u.smbfs_i.open == server_from_inode(i)->generation);
163 }
164
165 #define SMB_OPS_NUM_STATIC 5
166 struct smb_ops {
167 int (*read)(struct inode *inode, loff_t offset, int count,
168 char *data);
169 int (*write)(struct inode *inode, loff_t offset, int count, const
170 char *data);
171 int (*readdir)(struct file *filp, void *dirent, filldir_t filldir,
172 struct smb_cache_control *ctl);
173
174 int (*getattr)(struct smb_sb_info *server, struct dentry *dir,
175 struct smb_fattr *fattr);
176 /* int (*setattr)(...); */ /* setattr is really icky! */
177
178 int (*truncate)(struct inode *inode, loff_t length);
179
180
181 /* --- --- --- end of "static" entries --- --- --- */
182
183 int (*convert)(unsigned char *output, int olen,
184 const unsigned char *input, int ilen,
185 struct nls_table *nls_from,
186 struct nls_table *nls_to);
187 };
188
189 #endif /* __KERNEL__ */
190
191 #endif /* _LINUX_SMB_FS_H */
192