From 970e4936d7d15f35d00fd15a14f5343ba78b2fc8 Mon Sep 17 00:00:00 2001 From: Joel Becker Date: Thu, 13 Nov 2008 14:49:19 -0800 Subject: 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 Signed-off-by: Mark Fasheh --- fs/ocfs2/suballoc.h | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) (limited to 'fs/ocfs2/suballoc.h') diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h index 43de4fd826d..e3c13c77f9e 100644 --- a/fs/ocfs2/suballoc.h +++ b/fs/ocfs2/suballoc.h @@ -165,16 +165,15 @@ void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac); 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 -- cgit v1.2.3