OCFS2 can easily support nested transactions. We just have to
take care and not spoil statistics acquire semaphore unnecessarily.
Signed-off-by: Jan Kara <[EMAIL PROTECTED]>
---
fs/ocfs2/journal.c | 14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 99fe9d5..a00ac02 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;
}
--
1.5.2.4
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