ocfs2: Wrap inode block reads in a dedicated function.
The ocfs2 code currently reads inodes off disk with a simple
ocfs2_read_block() call. Each place that does this has a different set
of sanity checks it performs. Some check only the signature. A couple
validate the block number (the block read vs di->i_blkno). A couple
others check for VALID_FL. Only one place validates i_fs_generation. A
couple check nothing. Even when an error is found, they don't all do
the same thing.
We wrap inode reading into ocfs2_read_inode_block(). This will validate
all the above fields, going readonly if they are invalid (they never
should be). ocfs2_read_inode_block_full() is provided for the places
that want to pass read_block flags. Every caller is passing a struct
inode with a valid ip_blkno, so we don't need a separate blkno argument
either.
We will remove the validation checks from the rest of the code in a
later commit, as they are no longer necessary.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 687b287..19cfb1b 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -248,8 +248,8 @@
goto bail;
}
- status = ocfs2_read_blocks(inode, OCFS2_I(inode)->ip_blkno, 1,
- &alloc_bh, OCFS2_BH_IGNORE_CACHE);
+ status = ocfs2_read_inode_block_full(inode, &alloc_bh,
+ OCFS2_BH_IGNORE_CACHE);
if (status < 0) {
mlog_errno(status);
goto bail;
@@ -459,8 +459,8 @@
mutex_lock(&inode->i_mutex);
- status = ocfs2_read_blocks(inode, OCFS2_I(inode)->ip_blkno, 1,
- &alloc_bh, OCFS2_BH_IGNORE_CACHE);
+ status = ocfs2_read_inode_block_full(inode, &alloc_bh,
+ OCFS2_BH_IGNORE_CACHE);
if (status < 0) {
mlog_errno(status);
goto bail;