Commit 90e86a63 authored by Jan Kara's avatar Jan Kara Committed by Mark Fasheh
Browse files

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: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent 12c77527

fs/ocfs2/journal.c

+7 −7
Original line number Diff line number Diff line
@@ -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);
@@ -285,15 +283,17 @@ 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);



	if (!nested)

		up_read(&journal->j_trans_barrier);



	return ret;