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/dir.c b/fs/ocfs2/dir.c
index 026e6eb..5777045 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -231,7 +231,7 @@
struct ocfs2_dinode *di;
struct ocfs2_inline_data *data;
- ret = ocfs2_read_block(dir, OCFS2_I(dir)->ip_blkno, &di_bh);
+ ret = ocfs2_read_inode_block(dir, &di_bh);
if (ret) {
mlog_errno(ret);
goto out;
@@ -458,7 +458,7 @@
struct ocfs2_dinode *di;
struct ocfs2_inline_data *data;
- ret = ocfs2_read_block(dir, OCFS2_I(dir)->ip_blkno, &di_bh);
+ ret = ocfs2_read_inode_block(dir, &di_bh);
if (ret) {
mlog_errno(ret);
goto out;
@@ -636,7 +636,7 @@
struct ocfs2_inline_data *data;
struct ocfs2_dir_entry *de;
- ret = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno, &di_bh);
+ ret = ocfs2_read_inode_block(inode, &di_bh);
if (ret) {
mlog(ML_ERROR, "Unable to read inode block for dir %llu\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno);