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/*
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 */
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