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>
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 43de4fd..e3c13c7 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -165,16 +165,15 @@
u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster);
/*
- * By default, ocfs2_validate_group_descriptor() calls ocfs2_error() when it
+ * By default, ocfs2_read_group_descriptor() calls ocfs2_error() when it
* finds a problem. A caller that wants to check a group descriptor
- * without going readonly passes a nonzero clean_error. This is only
- * resize, really. Everyone else should be using
- * ocfs2_read_group_descriptor().
+ * without going readonly should read the block with ocfs2_read_block[s]()
+ * and then checking it with this function. This is only resize, really.
+ * Everyone else should be using ocfs2_read_group_descriptor().
*/
-int ocfs2_validate_group_descriptor(struct super_block *sb,
- struct ocfs2_dinode *di,
- struct buffer_head *bh,
- int clean_error);
+int ocfs2_check_group_descriptor(struct super_block *sb,
+ struct ocfs2_dinode *di,
+ struct buffer_head *bh);
/*
* Read a group descriptor block into *bh. If *bh is NULL, a bh will be
* allocated. This is a cached read. The descriptor will be validated with