[PATCH] reiserfs: skip commit on io error
This should have been part of the original io error patch, but got
dropped somewhere along the way.
It's extremely important when handling the i/o error in the journal to
not commit the transaction with corrupt data. This patch adds that code
back in.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 68b7b78..3f17ef8 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -1039,6 +1039,10 @@
}
atomic_dec(&journal->j_async_throttle);
+ /* We're skipping the commit if there's an error */
+ if (retval || reiserfs_is_journal_aborted(journal))
+ barrier = 0;
+
/* wait on everything written so far before writing the commit
* if we are in barrier mode, send the commit down now
*/
@@ -1077,10 +1081,16 @@
BUG_ON(atomic_read(&(jl->j_commit_left)) != 1);
if (!barrier) {
- if (buffer_dirty(jl->j_commit_bh))
- BUG();
- mark_buffer_dirty(jl->j_commit_bh);
- sync_dirty_buffer(jl->j_commit_bh);
+ /* If there was a write error in the journal - we can't commit
+ * this transaction - it will be invalid and, if successful,
+ * will just end up propogating the write error out to
+ * the file system. */
+ if (likely(!retval && !reiserfs_is_journal_aborted (journal))) {
+ if (buffer_dirty(jl->j_commit_bh))
+ BUG();
+ mark_buffer_dirty(jl->j_commit_bh) ;
+ sync_dirty_buffer(jl->j_commit_bh) ;
+ }
} else
wait_on_buffer(jl->j_commit_bh);