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authorJoel Becker <joel.becker@oracle.com>2008-11-13 14:49:19 -0800
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:36:53 -0800
commit970e4936d7d15f35d00fd15a14f5343ba78b2fc8 (patch)
tree92057c7deab6b9d8e5c3889d6a354b5989a3b68d /fs/ocfs2/dir.c
parent4ae1d69bedc8d174cb8a558694607e013157cde1 (diff)
ocfs2: Validate metadata only when it's read from disk.
Add an optional validation hook to ocfs2_read_blocks(). Now the validation function is only called when a block was actually read off of disk. It is not called when the buffer was in cache. We add a buffer state bit BH_NeedsValidate to flag these buffers. It must always be one higher than the last JBD2 buffer state bit. The dinode, dirblock, extent_block, and xattr_block validators are lifted to this scheme directly. The group_descriptor validator needs to be split into two pieces. The first part only needs the gd buffer and is passed to ocfs2_read_block(). The second part requires the dinode as well, and is called every time. It's only 3 compares, so it's tiny. This also allows us to clean up the non-fatal gd check used by resize.c. It now has no magic argument. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/dir.c')
-rw-r--r--fs/ocfs2/dir.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index c2f3fd93be5..7e863d40380 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -214,6 +214,8 @@ static int ocfs2_validate_dir_block(struct super_block *sb,
* Nothing yet. We don't validate dirents here, that's handled
* in-place when the code walks them.
*/
+ mlog(0, "Validating dirblock %llu\n",
+ (unsigned long long)bh->b_blocknr);
return 0;
}
@@ -255,20 +257,13 @@ static int ocfs2_read_dir_block(struct inode *inode, u64 v_block,
goto out;
}
- rc = ocfs2_read_blocks(inode, p_blkno, 1, &tmp, flags);
+ rc = ocfs2_read_blocks(inode, p_blkno, 1, &tmp, flags,
+ ocfs2_validate_dir_block);
if (rc) {
mlog_errno(rc);
goto out;
}
- if (!(flags & OCFS2_BH_READAHEAD)) {
- rc = ocfs2_validate_dir_block(inode->i_sb, tmp);
- if (rc) {
- brelse(tmp);
- goto out;
- }
- }
-
/* If ocfs2_read_blocks() got us a new bh, pass it up. */
if (!*bh)
*bh = tmp;