kernel-ark/include/linux/xattr_acl.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

51 lines
1.1 KiB
C

/*
File: linux/xattr_acl.h
(extended attribute representation of access control lists)
(C) 2000 Andreas Gruenbacher, <a.gruenbacher@computer.org>
*/
#ifndef _LINUX_XATTR_ACL_H
#define _LINUX_XATTR_ACL_H
#include <linux/posix_acl.h>
#define XATTR_NAME_ACL_ACCESS "system.posix_acl_access"
#define XATTR_NAME_ACL_DEFAULT "system.posix_acl_default"
#define XATTR_ACL_VERSION 0x0002
typedef struct {
__u16 e_tag;
__u16 e_perm;
__u32 e_id;
} xattr_acl_entry;
typedef struct {
__u32 a_version;
xattr_acl_entry a_entries[0];
} xattr_acl_header;
static inline size_t xattr_acl_size(int count)
{
return sizeof(xattr_acl_header) + count * sizeof(xattr_acl_entry);
}
static inline int xattr_acl_count(size_t size)
{
if (size < sizeof(xattr_acl_header))
return -1;
size -= sizeof(xattr_acl_header);
if (size % sizeof(xattr_acl_entry))
return -1;
return size / sizeof(xattr_acl_entry);
}
struct posix_acl * posix_acl_from_xattr(const void *value, size_t size);
int posix_acl_to_xattr(const struct posix_acl *acl, void *buffer, size_t size);
#endif /* _LINUX_XATTR_ACL_H */