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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [ext4/] [acl.h] - Blame information for rev 62

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/*
  File: fs/ext4/acl.h
 
  (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
*/
 
#include <linux/posix_acl_xattr.h>
 
#define EXT4_ACL_VERSION        0x0001
 
typedef struct {
        __le16          e_tag;
        __le16          e_perm;
        __le32          e_id;
} ext4_acl_entry;
 
typedef struct {
        __le16          e_tag;
        __le16          e_perm;
} ext4_acl_entry_short;
 
typedef struct {
        __le32          a_version;
} ext4_acl_header;
 
static inline size_t ext4_acl_size(int count)
{
        if (count <= 4) {
                return sizeof(ext4_acl_header) +
                       count * sizeof(ext4_acl_entry_short);
        } else {
                return sizeof(ext4_acl_header) +
                       4 * sizeof(ext4_acl_entry_short) +
                       (count - 4) * sizeof(ext4_acl_entry);
        }
}
 
static inline int ext4_acl_count(size_t size)
{
        ssize_t s;
        size -= sizeof(ext4_acl_header);
        s = size - 4 * sizeof(ext4_acl_entry_short);
        if (s < 0) {
                if (size % sizeof(ext4_acl_entry_short))
                        return -1;
                return size / sizeof(ext4_acl_entry_short);
        } else {
                if (s % sizeof(ext4_acl_entry))
                        return -1;
                return s / sizeof(ext4_acl_entry) + 4;
        }
}
 
#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL
 
/* Value for inode->u.ext4_i.i_acl and inode->u.ext4_i.i_default_acl
   if the ACL has not been cached */
#define EXT4_ACL_NOT_CACHED ((void *)-1)
 
/* acl.c */
extern int ext4_permission (struct inode *, int, struct nameidata *);
extern int ext4_acl_chmod (struct inode *);
extern int ext4_init_acl (handle_t *, struct inode *, struct inode *);
 
#else  /* CONFIG_EXT4DEV_FS_POSIX_ACL */
#include <linux/sched.h>
#define ext4_permission NULL
 
static inline int
ext4_acl_chmod(struct inode *inode)
{
        return 0;
}
 
static inline int
ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
{
        return 0;
}
#endif  /* CONFIG_EXT4DEV_FS_POSIX_ACL */
 

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`File: fs/ext4/acl.h`
3
4			`(C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>`
5			`*/`
6
7			`#include <linux/posix_acl_xattr.h>`
8
9			`#define EXT4_ACL_VERSION 0x0001`
10
11			`typedef struct {`
12			`__le16 e_tag;`
13			`__le16 e_perm;`
14			`__le32 e_id;`
15			`} ext4_acl_entry;`
16
17			`typedef struct {`
18			`__le16 e_tag;`
19			`__le16 e_perm;`
20			`} ext4_acl_entry_short;`
21
22			`typedef struct {`
23			`__le32 a_version;`
24			`} ext4_acl_header;`
25
26			`static inline size_t ext4_acl_size(int count)`
27			`{`
28			`if (count <= 4) {`
29			`return sizeof(ext4_acl_header) +`
30			`count * sizeof(ext4_acl_entry_short);`
31			`} else {`
32			`return sizeof(ext4_acl_header) +`
33			`4 * sizeof(ext4_acl_entry_short) +`
34			`(count - 4) * sizeof(ext4_acl_entry);`
35			`}`
36			`}`
37
38			`static inline int ext4_acl_count(size_t size)`
39			`{`
40			`ssize_t s;`
41			`size -= sizeof(ext4_acl_header);`
42			`s = size - 4 * sizeof(ext4_acl_entry_short);`
43			`if (s < 0) {`
44			`if (size % sizeof(ext4_acl_entry_short))`
45			`return -1;`
46			`return size / sizeof(ext4_acl_entry_short);`
47			`} else {`
48			`if (s % sizeof(ext4_acl_entry))`
49			`return -1;`
50			`return s / sizeof(ext4_acl_entry) + 4;`
51			`}`
52			`}`
53
54			`#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL`
55
56			`/* Value for inode->u.ext4_i.i_acl and inode->u.ext4_i.i_default_acl`
57			`if the ACL has not been cached */`
58			`#define EXT4_ACL_NOT_CACHED ((void *)-1)`
59
60			`/* acl.c */`
61			`extern int ext4_permission (struct inode , int, struct nameidata );`
62			`extern int ext4_acl_chmod (struct inode *);`
63			`extern int ext4_init_acl (handle_t , struct inode , struct inode *);`
64
65			`#else /* CONFIG_EXT4DEV_FS_POSIX_ACL */`
66			`#include <linux/sched.h>`
67			`#define ext4_permission NULL`
68
69			`static inline int`
70			`ext4_acl_chmod(struct inode *inode)`
71			`{`
72			`return 0;`
73			`}`
74
75			`static inline int`
76			`ext4_init_acl(handle_t handle, struct inode inode, struct inode *dir)`
77			`{`
78			`return 0;`
79			`}`
80			`#endif /* CONFIG_EXT4DEV_FS_POSIX_ACL */`
81

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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [ext4/] [acl.h] - Blame information for rev 62