[PATCH 1/2] xfs: factor out quotaoff intent AIL removal and memory free

Brian Foster
2020-03-16T17:23:16Z

AIL removal of the quotaoff start intent and free of both intents is
hardcoded to the ->iop_committed() handler of the end intent. Factor
out the start intent handling code so it can be used in a future
patch to properly handle quotaoff errors. Use xfs_trans_ail_remove()
instead of the _delete() variant to acquire the AIL lock and also
handle cases where an intent might not reside in the AIL at the
time of a failure.

Signed-off-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_dquot_item.c | 29 ++++++++++++++++++++---------
fs/xfs/xfs_dquot_item.h | 1 +
2 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/fs/xfs/xfs_dquot_item.c b/fs/xfs/xfs_dquot_item.c
index d60647d7197b..2b816e9b4465 100644
--- a/fs/xfs/xfs_dquot_item.c
+++ b/fs/xfs/xfs_dquot_item.c
@@ -307,18 +307,10 @@ xfs_qm_qoffend_logitem_committed(
{
struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
- struct xfs_ail *ailp = qfs->qql_item.li_ailp;

- /*
- * Delete the qoff-start logitem from the AIL.
- * xfs_trans_ail_delete() drops the AIL lock.
- */
- spin_lock(&ailp->ail_lock);
- xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
+ xfs_qm_qoff_logitem_relse(qfs);

- kmem_free(qfs->qql_item.li_lv_shadow);
kmem_free(lip->li_lv_shadow);
- kmem_free(qfs);
kmem_free(qfe);
return (xfs_lsn_t)-1;
}
@@ -336,6 +328,25 @@ static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
.iop_push = xfs_qm_qoff_logitem_push,
};

+/*
+ * Delete the quotaoff intent from the AIL and free it. On success,
+ * this should only be called for the start item. It can be used for
+ * either on shutdown or abort.
+ */
+void
+xfs_qm_qoff_logitem_relse(
+ struct xfs_qoff_logitem *qoff)
+{
+ struct xfs_log_item *lip = &qoff->qql_item;
+
+ ASSERT(test_bit(XFS_LI_IN_AIL, &lip->li_flags) ||
+ test_bit(XFS_LI_ABORTED, &lip->li_flags) ||
+ XFS_FORCED_SHUTDOWN(lip->li_mountp));
+ xfs_trans_ail_remove(lip, SHUTDOWN_LOG_IO_ERROR);
+ kmem_free(lip->li_lv_shadow);
+ kmem_free(qoff);
+}
+
/*
* Allocate and initialize an quotaoff item of the correct quota type(s).
*/
diff --git a/fs/xfs/xfs_dquot_item.h b/fs/xfs/xfs_dquot_item.h
index 3bb19e556ade..2b86a43d7ce2 100644
--- a/fs/xfs/xfs_dquot_item.h
+++ b/fs/xfs/xfs_dquot_item.h
@@ -28,6 +28,7 @@ void xfs_qm_dquot_logitem_init(struct xfs_dquot *dqp);
struct xfs_qoff_logitem *xfs_qm_qoff_logitem_init(struct xfs_mount *mp,
struct xfs_qoff_logitem *start,
uint flags);
+void xfs_qm_qoff_logitem_relse(struct xfs_qoff_logitem *);
struct xfs_qoff_logitem *xfs_trans_get_qoff_item(struct xfs_trans *tp,
struct xfs_qoff_logitem *startqoff,
uint flags);
--
2.21.1