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-rw-r--r--fs/jbd2/journal.c38
1 files changed, 31 insertions, 7 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 303ccd953e95..5804466b5785 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -876,9 +876,10 @@ int jbd2_journal_get_log_tail(journal_t *journal, tid_t *tid,
*
* Requires j_checkpoint_mutex
*/
-void __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
+int __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
{
unsigned long freed;
+ int ret;
BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
@@ -888,7 +889,10 @@ void __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
* space and if we lose sb update during power failure we'd replay
* old transaction with possibly newly overwritten data.
*/
- jbd2_journal_update_sb_log_tail(journal, tid, block, WRITE_FUA);
+ ret = jbd2_journal_update_sb_log_tail(journal, tid, block, WRITE_FUA);
+ if (ret)
+ goto out;
+
write_lock(&journal->j_state_lock);
freed = block - journal->j_tail;
if (block < journal->j_tail)
@@ -904,6 +908,9 @@ void __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
journal->j_tail_sequence = tid;
journal->j_tail = block;
write_unlock(&journal->j_state_lock);
+
+out:
+ return ret;
}
/*
@@ -1322,7 +1329,7 @@ static int journal_reset(journal_t *journal)
return jbd2_journal_start_thread(journal);
}
-static void jbd2_write_superblock(journal_t *journal, int write_op)
+static int jbd2_write_superblock(journal_t *journal, int write_op)
{
struct buffer_head *bh = journal->j_sb_buffer;
journal_superblock_t *sb = journal->j_superblock;
@@ -1361,7 +1368,10 @@ static void jbd2_write_superblock(journal_t *journal, int write_op)
printk(KERN_ERR "JBD2: Error %d detected when updating "
"journal superblock for %s.\n", ret,
journal->j_devname);
+ jbd2_journal_abort(journal, ret);
}
+
+ return ret;
}
/**
@@ -1374,10 +1384,11 @@ static void jbd2_write_superblock(journal_t *journal, int write_op)
* Update a journal's superblock information about log tail and write it to
* disk, waiting for the IO to complete.
*/
-void jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
+int jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
unsigned long tail_block, int write_op)
{
journal_superblock_t *sb = journal->j_superblock;
+ int ret;
BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
jbd_debug(1, "JBD2: updating superblock (start %lu, seq %u)\n",
@@ -1386,13 +1397,18 @@ void jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
sb->s_sequence = cpu_to_be32(tail_tid);
sb->s_start = cpu_to_be32(tail_block);
- jbd2_write_superblock(journal, write_op);
+ ret = jbd2_write_superblock(journal, write_op);
+ if (ret)
+ goto out;
/* Log is no longer empty */
write_lock(&journal->j_state_lock);
WARN_ON(!sb->s_sequence);
journal->j_flags &= ~JBD2_FLUSHED;
write_unlock(&journal->j_state_lock);
+
+out:
+ return ret;
}
/**
@@ -1941,7 +1957,14 @@ int jbd2_journal_flush(journal_t *journal)
return -EIO;
mutex_lock(&journal->j_checkpoint_mutex);
- jbd2_cleanup_journal_tail(journal);
+ if (!err) {
+ err = jbd2_cleanup_journal_tail(journal);
+ if (err < 0) {
+ mutex_unlock(&journal->j_checkpoint_mutex);
+ goto out;
+ }
+ err = 0;
+ }
/* Finally, mark the journal as really needing no recovery.
* This sets s_start==0 in the underlying superblock, which is
@@ -1957,7 +1980,8 @@ int jbd2_journal_flush(journal_t *journal)
J_ASSERT(journal->j_head == journal->j_tail);
J_ASSERT(journal->j_tail_sequence == journal->j_transaction_sequence);
write_unlock(&journal->j_state_lock);
- return 0;
+out:
+ return err;
}
/**