diff options
| author | Christoph Hellwig <hch@lst.de> | 2014-11-28 14:24:37 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2014-11-28 14:24:37 +1100 |
| commit | 5beda58bf269febe67eca91d5d5dc7c7d392232a (patch) | |
| tree | 59706664dbd90908f8c2342bdb42f9ad446279cf /fs/xfs/libxfs | |
| parent | 6d3ebaae7c20128bfa6965a8d5cee0d1deea8486 (diff) | |
xfs: move acl structures to xfs_format.h
Move the on-disk ACL format to xfs_format.h, so that repair can
use the common defintion.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_format.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 3be17eee8f30..e99d3290152a 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -627,4 +627,40 @@ struct xfs_btree_block { #define XFS_BTREE_LBLOCK_CRC_OFF \ offsetof(struct xfs_btree_block, bb_u.l.bb_crc) +/* + * On-disk XFS access control list structure. + */ +struct xfs_acl_entry { + __be32 ae_tag; + __be32 ae_id; + __be16 ae_perm; + __be16 ae_pad; /* fill the implicit hole in the structure */ +}; + +struct xfs_acl { + __be32 acl_cnt; + struct xfs_acl_entry acl_entry[0]; +}; + +/* + * The number of ACL entries allowed is defined by the on-disk format. + * For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is + * limited only by the maximum size of the xattr that stores the information. + */ +#define XFS_ACL_MAX_ENTRIES(mp) \ + (xfs_sb_version_hascrc(&mp->m_sb) \ + ? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \ + sizeof(struct xfs_acl_entry) \ + : 25) + +#define XFS_ACL_MAX_SIZE(mp) \ + (sizeof(struct xfs_acl) + \ + sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp))) + +/* On-disk XFS extended attribute names */ +#define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE" +#define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT" +#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1) +#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) + #endif /* __XFS_FORMAT_H__ */ |