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authorChristoph Hellwig <hch@lst.de>2014-11-28 06:24:37 +0300
committerDave Chinner <david@fromorbit.com>2014-11-28 06:24:37 +0300
commit5beda58bf269febe67eca91d5d5dc7c7d392232a (patch)
tree59706664dbd90908f8c2342bdb42f9ad446279cf /fs/xfs/libxfs
parent6d3ebaae7c20128bfa6965a8d5cee0d1deea8486 (diff)
downloadlinux-5beda58bf269febe67eca91d5d5dc7c7d392232a.tar.xz
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.h36
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__ */