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authorPhillip Lougher <phillip@lougher.demon.co.uk>2010-05-14 20:48:47 +0100
committerPhillip Lougher <phillip@lougher.demon.co.uk>2010-05-17 19:54:05 +0100
commit4b5397dc24ab12afaac85be3d0863b7f6eb8b0f0 (patch)
treebd385be428cfefcdf520f19c532196df1202d687 /fs/squashfs/super.c
parentb57f95a38233a2e73b679bea4a5453a1cc2a1cc9 (diff)
squashfs: add xattr id support
This patch adds support for mapping xattr ids (stored in inodes) into the on-disk location of the xattrs themselves. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
Diffstat (limited to 'fs/squashfs/super.c')
-rw-r--r--fs/squashfs/super.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 48b6f4a385a..c4dfc393fa5 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -36,6 +36,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/magic.h>
+#include <linux/xattr.h>
#include "squashfs_fs.h"
#include "squashfs_fs_sb.h"
@@ -82,7 +83,7 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
long long root_inode;
unsigned short flags;
unsigned int fragments;
- u64 lookup_table_start;
+ u64 lookup_table_start, xattr_id_table_start;
int err;
TRACE("Entered squashfs_fill_superblock\n");
@@ -143,7 +144,7 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
* Check if there's xattrs in the filesystem. These are not
* supported in this version, so warn that they will be ignored.
*/
- if (le64_to_cpu(sblk->xattr_table_start) != SQUASHFS_INVALID_BLK)
+ if (le64_to_cpu(sblk->xattr_id_table_start) != SQUASHFS_INVALID_BLK)
ERROR("Xattrs in filesystem, these will be ignored\n");
/* Check the filesystem does not extend beyond the end of the
@@ -253,7 +254,7 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
allocate_lookup_table:
lookup_table_start = le64_to_cpu(sblk->lookup_table_start);
if (lookup_table_start == SQUASHFS_INVALID_BLK)
- goto allocate_root;
+ goto allocate_xattr_table;
/* Allocate and read inode lookup table */
msblk->inode_lookup_table = squashfs_read_inode_lookup_table(sb,
@@ -266,6 +267,19 @@ allocate_lookup_table:
sb->s_export_op = &squashfs_export_ops;
+allocate_xattr_table:
+ xattr_id_table_start = le64_to_cpu(sblk->xattr_id_table_start);
+ if (xattr_id_table_start == SQUASHFS_INVALID_BLK)
+ goto allocate_root;
+
+ /* Allocate and read xattr id lookup table */
+ msblk->xattr_id_table = squashfs_read_xattr_id_table(sb,
+ xattr_id_table_start, &msblk->xattr_table, &msblk->xattr_ids);
+ if (IS_ERR(msblk->xattr_id_table)) {
+ err = PTR_ERR(msblk->xattr_id_table);
+ msblk->xattr_id_table = NULL;
+ goto failed_mount;
+ }
allocate_root:
root = new_inode(sb);
if (!root) {
@@ -301,6 +315,7 @@ failed_mount:
kfree(msblk->inode_lookup_table);
kfree(msblk->fragment_index);
kfree(msblk->id_table);
+ kfree(msblk->xattr_id_table);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
kfree(sblk);
@@ -355,6 +370,7 @@ static void squashfs_put_super(struct super_block *sb)
kfree(sbi->fragment_index);
kfree(sbi->meta_index);
kfree(sbi->inode_lookup_table);
+ kfree(sbi->xattr_id_table);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
}