[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 68b7b78638ff0e1bf050000f1c3e201a24584dd6..3f17ef844fb65ad61b373c2b746ae832a53d0aba 100644 (file)
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -1039,6 +1039,10 @@ static int flush_commit_list(struct super_block *s,
        }
        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 @@ static int flush_commit_list(struct super_block *s,
        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);