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-rw-r--r--fs/jbd2/transaction.c33
1 files changed, 27 insertions, 6 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index f3d06174b051..cbe8b3aece5b 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1280,8 +1280,6 @@ void jbd2_buffer_abort_trigger(struct journal_head *jh,
triggers->t_abort(triggers, jh2bh(jh));
}
-
-
/**
* int jbd2_journal_dirty_metadata() - mark a buffer as containing dirty metadata
* @handle: transaction to add buffer to.
@@ -1314,12 +1312,36 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
if (is_handle_aborted(handle))
return -EROFS;
- journal = transaction->t_journal;
- jh = jbd2_journal_grab_journal_head(bh);
- if (!jh) {
+ if (!buffer_jbd(bh)) {
ret = -EUCLEAN;
goto out;
}
+ /*
+ * We don't grab jh reference here since the buffer must be part
+ * of the running transaction.
+ */
+ jh = bh2jh(bh);
+ J_ASSERT_JH(jh, jh->b_transaction == transaction ||
+ jh->b_next_transaction == transaction);
+ if (jh->b_modified == 1) {
+ /*
+ * If it's in our transaction it must be in BJ_Metadata list.
+ * The assertion is unreliable since we may see jh in
+ * inconsistent state unless we grab bh_state lock. But this
+ * is crutial to catch bugs so let's do a reliable check until
+ * the lockless handling is fully proven.
+ */
+ if (jh->b_transaction == transaction &&
+ jh->b_jlist != BJ_Metadata) {
+ jbd_lock_bh_state(bh);
+ J_ASSERT_JH(jh, jh->b_transaction != transaction ||
+ jh->b_jlist == BJ_Metadata);
+ jbd_unlock_bh_state(bh);
+ }
+ goto out;
+ }
+
+ journal = transaction->t_journal;
jbd_debug(5, "journal_head %p\n", jh);
JBUFFER_TRACE(jh, "entry");
@@ -1410,7 +1432,6 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
spin_unlock(&journal->j_list_lock);
out_unlock_bh:
jbd_unlock_bh_state(bh);
- jbd2_journal_put_journal_head(jh);
out:
JBUFFER_TRACE(jh, "exit");
return ret;