mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 20:54:10 +08:00
0cad624662
Add a rcu argument to the ->get_acl() callback to allow get_cached_acl_rcu() to call the ->get_acl() method in the next patch. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
File: fs/ext2/acl.h
|
|
|
|
(C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
|
*/
|
|
|
|
#include <linux/posix_acl_xattr.h>
|
|
|
|
#define EXT2_ACL_VERSION 0x0001
|
|
|
|
typedef struct {
|
|
__le16 e_tag;
|
|
__le16 e_perm;
|
|
__le32 e_id;
|
|
} ext2_acl_entry;
|
|
|
|
typedef struct {
|
|
__le16 e_tag;
|
|
__le16 e_perm;
|
|
} ext2_acl_entry_short;
|
|
|
|
typedef struct {
|
|
__le32 a_version;
|
|
} ext2_acl_header;
|
|
|
|
static inline size_t ext2_acl_size(int count)
|
|
{
|
|
if (count <= 4) {
|
|
return sizeof(ext2_acl_header) +
|
|
count * sizeof(ext2_acl_entry_short);
|
|
} else {
|
|
return sizeof(ext2_acl_header) +
|
|
4 * sizeof(ext2_acl_entry_short) +
|
|
(count - 4) * sizeof(ext2_acl_entry);
|
|
}
|
|
}
|
|
|
|
static inline int ext2_acl_count(size_t size)
|
|
{
|
|
ssize_t s;
|
|
size -= sizeof(ext2_acl_header);
|
|
s = size - 4 * sizeof(ext2_acl_entry_short);
|
|
if (s < 0) {
|
|
if (size % sizeof(ext2_acl_entry_short))
|
|
return -1;
|
|
return size / sizeof(ext2_acl_entry_short);
|
|
} else {
|
|
if (s % sizeof(ext2_acl_entry))
|
|
return -1;
|
|
return s / sizeof(ext2_acl_entry) + 4;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_EXT2_FS_POSIX_ACL
|
|
|
|
/* acl.c */
|
|
extern struct posix_acl *ext2_get_acl(struct inode *inode, int type, bool rcu);
|
|
extern int ext2_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
|
|
struct posix_acl *acl, int type);
|
|
extern int ext2_init_acl (struct inode *, struct inode *);
|
|
|
|
#else
|
|
#include <linux/sched.h>
|
|
#define ext2_get_acl NULL
|
|
#define ext2_set_acl NULL
|
|
|
|
static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|