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authorJoel Becker <joel.becker@oracle.com>2008-11-14 01:49:19 +0300
committerMark Fasheh <mfasheh@suse.com>2009-01-05 19:36:53 +0300
commit970e4936d7d15f35d00fd15a14f5343ba78b2fc8 (patch)
tree92057c7deab6b9d8e5c3889d6a354b5989a3b68d /fs/ocfs2/inode.c
parent4ae1d69bedc8d174cb8a558694607e013157cde1 (diff)
downloadlinux-970e4936d7d15f35d00fd15a14f5343ba78b2fc8.tar.xz
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/inode.c')
-rw-r--r--fs/ocfs2/inode.c18
1 files changed, 5 insertions, 13 deletions
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 9eb701b86466..ec3497bafda6 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1255,6 +1255,9 @@ int ocfs2_validate_inode_block(struct super_block *sb,
int rc = -EINVAL;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+ mlog(0, "Validating dinode %llu\n",
+ (unsigned long long)bh->b_blocknr);
+
BUG_ON(!buffer_uptodate(bh));
if (!OCFS2_IS_VALID_DINODE(di)) {
@@ -1300,23 +1303,12 @@ int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
struct buffer_head *tmp = *bh;
rc = ocfs2_read_blocks(inode, OCFS2_I(inode)->ip_blkno, 1, &tmp,
- flags);
- if (rc)
- goto out;
-
- if (!(flags & OCFS2_BH_READAHEAD)) {
- rc = ocfs2_validate_inode_block(inode->i_sb, tmp);
- if (rc) {
- brelse(tmp);
- goto out;
- }
- }
+ flags, ocfs2_validate_inode_block);
/* If ocfs2_read_blocks() got us a new bh, pass it up. */
- if (!*bh)
+ if (!rc && !*bh)
*bh = tmp;
-out:
return rc;
}