summaryrefslogtreecommitdiffstats
path: root/fs/xfs/libxfs/xfs_attr_sf.h
diff options
context:
space:
mode:
authorDave Chinner <dchinner@redhat.com>2014-06-25 14:57:36 +1000
committerDave Chinner <david@fromorbit.com>2014-06-25 14:57:36 +1000
commit84be0ffc9043f7c56044294eb775a2200452c76d (patch)
treef92ae3d2a8ddfc0c98c76c434432f42b7c14ac0d /fs/xfs/libxfs/xfs_attr_sf.h
parent69116a1317ce3d2292e062bfb1a22757b95dcd06 (diff)
downloadlinux-84be0ffc9043f7c56044294eb775a2200452c76d.tar.bz2
libxfs: move header files
Move all the header files that are shared with userspace into libxfs. This is done as one big chunk simpy to get it done quickly. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_attr_sf.h')
-rw-r--r--fs/xfs/libxfs/xfs_attr_sf.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_attr_sf.h b/fs/xfs/libxfs/xfs_attr_sf.h
new file mode 100644
index 000000000000..919756e3ba53
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_attr_sf.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef __XFS_ATTR_SF_H__
+#define __XFS_ATTR_SF_H__
+
+/*
+ * Attribute storage when stored inside the inode.
+ *
+ * Small attribute lists are packed as tightly as possible so as
+ * to fit into the literal area of the inode.
+ */
+
+/*
+ * Entries are packed toward the top as tight as possible.
+ */
+typedef struct xfs_attr_shortform {
+ struct xfs_attr_sf_hdr { /* constant-structure header block */
+ __be16 totsize; /* total bytes in shortform list */
+ __u8 count; /* count of active entries */
+ } hdr;
+ struct xfs_attr_sf_entry {
+ __uint8_t namelen; /* actual length of name (no NULL) */
+ __uint8_t valuelen; /* actual length of value (no NULL) */
+ __uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */
+ __uint8_t nameval[1]; /* name & value bytes concatenated */
+ } list[1]; /* variable sized array */
+} xfs_attr_shortform_t;
+typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t;
+typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t;
+
+/*
+ * We generate this then sort it, attr_list() must return things in hash-order.
+ */
+typedef struct xfs_attr_sf_sort {
+ __uint8_t entno; /* entry number in original list */
+ __uint8_t namelen; /* length of name value (no null) */
+ __uint8_t valuelen; /* length of value */
+ __uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */
+ xfs_dahash_t hash; /* this entry's hash value */
+ unsigned char *name; /* name value, pointer into buffer */
+} xfs_attr_sf_sort_t;
+
+#define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen) /* space name/value uses */ \
+ (((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen)))
+#define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \
+ ((1 << (NBBY*(int)sizeof(__uint8_t))) - 1)
+#define XFS_ATTR_SF_ENTSIZE(sfep) /* space an entry uses */ \
+ ((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen)
+#define XFS_ATTR_SF_NEXTENTRY(sfep) /* next entry in struct */ \
+ ((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep)))
+#define XFS_ATTR_SF_TOTSIZE(dp) /* total space in use */ \
+ (be16_to_cpu(((xfs_attr_shortform_t *) \
+ ((dp)->i_afp->if_u1.if_data))->hdr.totsize))
+
+#endif /* __XFS_ATTR_SF_H__ */