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/inode.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) (limited to 'fs/ocfs2/inode.c') 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; } -- cgit v1.2.3