1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3  File: fs/ext2/acl.h
 4
 5  (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
 6*/
 7
 8#include <linux/posix_acl_xattr.h>
 9
10#define EXT2_ACL_VERSION	0x0001
11
12typedef struct {
13	__le16		e_tag;
14	__le16		e_perm;
15	__le32		e_id;
16} ext2_acl_entry;
17
18typedef struct {
19	__le16		e_tag;
20	__le16		e_perm;
21} ext2_acl_entry_short;
22
23typedef struct {
24	__le32		a_version;
25} ext2_acl_header;
26
27static inline size_t ext2_acl_size(int count)
28{
29	if (count <= 4) {
30		return sizeof(ext2_acl_header) +
31		       count * sizeof(ext2_acl_entry_short);
32	} else {
33		return sizeof(ext2_acl_header) +
34		       4 * sizeof(ext2_acl_entry_short) +
35		       (count - 4) * sizeof(ext2_acl_entry);
36	}
37}
38
39static inline int ext2_acl_count(size_t size)
40{
41	ssize_t s;
42	size -= sizeof(ext2_acl_header);
43	s = size - 4 * sizeof(ext2_acl_entry_short);
44	if (s < 0) {
45		if (size % sizeof(ext2_acl_entry_short))
46			return -1;
47		return size / sizeof(ext2_acl_entry_short);
48	} else {
49		if (s % sizeof(ext2_acl_entry))
50			return -1;
51		return s / sizeof(ext2_acl_entry) + 4;
52	}
53}
54
55#ifdef CONFIG_EXT2_FS_POSIX_ACL
56
57/* acl.c */
58extern struct posix_acl *ext2_get_acl(struct inode *inode, int type, bool rcu);
59extern int ext2_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
60			struct posix_acl *acl, int type);
61extern int ext2_init_acl (struct inode *, struct inode *);
62
63#else
64#include <linux/sched.h>
65#define ext2_get_acl	NULL
66#define ext2_set_acl	NULL
67
68static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
69{
70	return 0;
71}
72#endif
73

 
 1/*
 2  File: fs/ext2/acl.h
 3
 4  (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
 5*/
 6
 7#include <linux/posix_acl_xattr.h>
 8
 9#define EXT2_ACL_VERSION	0x0001
10
11typedef struct {
12	__le16		e_tag;
13	__le16		e_perm;
14	__le32		e_id;
15} ext2_acl_entry;
16
17typedef struct {
18	__le16		e_tag;
19	__le16		e_perm;
20} ext2_acl_entry_short;
21
22typedef struct {
23	__le32		a_version;
24} ext2_acl_header;
25
26static inline size_t ext2_acl_size(int count)
27{
28	if (count <= 4) {
29		return sizeof(ext2_acl_header) +
30		       count * sizeof(ext2_acl_entry_short);
31	} else {
32		return sizeof(ext2_acl_header) +
33		       4 * sizeof(ext2_acl_entry_short) +
34		       (count - 4) * sizeof(ext2_acl_entry);
35	}
36}
37
38static inline int ext2_acl_count(size_t size)
39{
40	ssize_t s;
41	size -= sizeof(ext2_acl_header);
42	s = size - 4 * sizeof(ext2_acl_entry_short);
43	if (s < 0) {
44		if (size % sizeof(ext2_acl_entry_short))
45			return -1;
46		return size / sizeof(ext2_acl_entry_short);
47	} else {
48		if (s % sizeof(ext2_acl_entry))
49			return -1;
50		return s / sizeof(ext2_acl_entry) + 4;
51	}
52}
53
54#ifdef CONFIG_EXT2_FS_POSIX_ACL
55
56/* acl.c */
57extern struct posix_acl *ext2_get_acl(struct inode *inode, int type);
58extern int ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 
59extern int ext2_init_acl (struct inode *, struct inode *);
60
61#else
62#include <linux/sched.h>
63#define ext2_get_acl	NULL
64#define ext2_set_acl	NULL
65
66static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
67{
68	return 0;
69}
70#endif
71