home *** CD-ROM | disk | FTP | other *** search
- /*
- File: linux/posix_acl_xattr.h
-
- Extended attribute system call representation of Access Control Lists.
-
- Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org>
- Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com>
- */
- #ifndef _POSIX_ACL_XATTR_H
- #define _POSIX_ACL_XATTR_H
-
- #include <linux/posix_acl.h>
-
- /* Extended attribute names */
- #define POSIX_ACL_XATTR_ACCESS "system.posix_acl_access"
- #define POSIX_ACL_XATTR_DEFAULT "system.posix_acl_default"
-
- /* Supported ACL a_version fields */
- #define POSIX_ACL_XATTR_VERSION 0x0002
-
-
- /* An undefined entry e_id value */
- #define ACL_UNDEFINED_ID (-1)
-
- typedef struct {
- __u16 e_tag;
- __u16 e_perm;
- __u32 e_id;
- } posix_acl_xattr_entry;
-
- typedef struct {
- __u32 a_version;
- posix_acl_xattr_entry a_entries[0];
- } posix_acl_xattr_header;
-
-
- static inline size_t
- posix_acl_xattr_size(int count)
- {
- return (sizeof(posix_acl_xattr_header) +
- (count * sizeof(posix_acl_xattr_entry)));
- }
-
- static inline int
- posix_acl_xattr_count(size_t size)
- {
- if (size < sizeof(posix_acl_xattr_header))
- return -1;
- size -= sizeof(posix_acl_xattr_header);
- if (size % sizeof(posix_acl_xattr_entry))
- return -1;
- return size / sizeof(posix_acl_xattr_entry);
- }
-
- #endif /* _POSIX_ACL_XATTR_H */
-