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authorJan Kara <jack@suse.cz>2008-08-27 22:30:28 +0200
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:40:23 -0800
commit90e86a63eadf1a3b2f19b68d82150dc63fe01443 (patch)
tree4168749ab4c9a0e849c9ad419ee66a2992053243
parent12c77527e4138bc3b17d17b0e0c909e4fc84924f (diff)
ocfs2: Support nested transactions
OCFS2 can easily support nested transactions. We just have to take care and not spoil statistics acquire semaphore unnecessarily. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
-rw-r--r--fs/ocfs2/journal.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 12b62a3cbf6..11a1178d5ee 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -256,11 +256,9 @@ handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs)
BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE);
BUG_ON(max_buffs <= 0);
- /* JBD might support this, but our journalling code doesn't yet. */
- if (journal_current_handle()) {
- mlog(ML_ERROR, "Recursive transaction attempted!\n");
- BUG();
- }
+ /* Nested transaction? Just return the handle... */
+ if (journal_current_handle())
+ return jbd2_journal_start(journal, max_buffs);
down_read(&osb->journal->j_trans_barrier);
@@ -285,16 +283,18 @@ handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs)
int ocfs2_commit_trans(struct ocfs2_super *osb,
handle_t *handle)
{
- int ret;
+ int ret, nested;
struct ocfs2_journal *journal = osb->journal;
BUG_ON(!handle);
+ nested = handle->h_ref > 1;
ret = jbd2_journal_stop(handle);
if (ret < 0)
mlog_errno(ret);
- up_read(&journal->j_trans_barrier);
+ if (!nested)
+ up_read(&journal->j_trans_barrier);
return ret;
}