From: Christoph Hellwig <hch@lst.de>
To: linux-xfs@vger.kernel.org
Subject: [PATCH 08/11] xfs: refactor xfs_defer_finish_noroll
Date: Wed, 29 Apr 2020 17:05:08 +0200 [thread overview]
Message-ID: <20200429150511.2191150-9-hch@lst.de> (raw)
In-Reply-To: <20200429150511.2191150-1-hch@lst.de>
Split out a helper that operates on a single xfs_defer_pending structure
to untangle the code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/libxfs/xfs_defer.c | 128 ++++++++++++++++++--------------------
1 file changed, 59 insertions(+), 69 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_defer.c b/fs/xfs/libxfs/xfs_defer.c
index 5402a7bf31108..20950b56cdd07 100644
--- a/fs/xfs/libxfs/xfs_defer.c
+++ b/fs/xfs/libxfs/xfs_defer.c
@@ -351,6 +351,53 @@ xfs_defer_cancel_list(
}
}
+/*
+ * Log an intent-done item for the first pending intent, and finish the work
+ * items.
+ */
+static int
+xfs_defer_finish_one(
+ struct xfs_trans *tp,
+ struct xfs_defer_pending *dfp)
+{
+ const struct xfs_defer_op_type *ops = defer_op_types[dfp->dfp_type];
+ void *state = NULL;
+ struct list_head *li, *n;
+ int error;
+
+ trace_xfs_defer_pending_finish(tp->t_mountp, dfp);
+
+ dfp->dfp_done = ops->create_done(tp, dfp->dfp_intent, dfp->dfp_count);
+ list_for_each_safe(li, n, &dfp->dfp_work) {
+ list_del(li);
+ dfp->dfp_count--;
+ error = ops->finish_item(tp, li, dfp->dfp_done, &state);
+ if (error == -EAGAIN) {
+ /*
+ * Caller wants a fresh transaction; put the work item
+ * back on the list and log a new log intent item to
+ * replace the old one. See "Requesting a Fresh
+ * Transaction while Finishing Deferred Work" above.
+ */
+ list_add(li, &dfp->dfp_work);
+ dfp->dfp_count++;
+ dfp->dfp_done = NULL;
+ xfs_defer_create_intent(tp, dfp, false);
+ }
+
+ if (error)
+ goto out;
+ }
+
+ /* Done with the dfp, free it. */
+ list_del(&dfp->dfp_list);
+ kmem_free(dfp);
+out:
+ if (ops->finish_cleanup)
+ ops->finish_cleanup(tp, state, error);
+ return error;
+}
+
/*
* Finish all the pending work. This involves logging intent items for
* any work items that wandered in since the last transaction roll (if
@@ -364,11 +411,7 @@ xfs_defer_finish_noroll(
struct xfs_trans **tp)
{
struct xfs_defer_pending *dfp;
- struct list_head *li;
- struct list_head *n;
- void *state;
int error = 0;
- const struct xfs_defer_op_type *ops;
LIST_HEAD(dop_pending);
ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
@@ -377,83 +420,30 @@ xfs_defer_finish_noroll(
/* Until we run out of pending work to finish... */
while (!list_empty(&dop_pending) || !list_empty(&(*tp)->t_dfops)) {
- /* log intents and pull in intake items */
xfs_defer_create_intents(*tp);
list_splice_tail_init(&(*tp)->t_dfops, &dop_pending);
- /*
- * Roll the transaction.
- */
error = xfs_defer_trans_roll(tp);
if (error)
- goto out;
+ goto out_shutdown;
- /* Log an intent-done item for the first pending item. */
dfp = list_first_entry(&dop_pending, struct xfs_defer_pending,
dfp_list);
- ops = defer_op_types[dfp->dfp_type];
- trace_xfs_defer_pending_finish((*tp)->t_mountp, dfp);
- dfp->dfp_done = ops->create_done(*tp, dfp->dfp_intent,
- dfp->dfp_count);
-
- /* Finish the work items. */
- state = NULL;
- list_for_each_safe(li, n, &dfp->dfp_work) {
- list_del(li);
- dfp->dfp_count--;
- error = ops->finish_item(*tp, li, dfp->dfp_done,
- &state);
- if (error == -EAGAIN) {
- /*
- * Caller wants a fresh transaction;
- * put the work item back on the list
- * and jump out.
- */
- list_add(li, &dfp->dfp_work);
- dfp->dfp_count++;
- break;
- } else if (error) {
- /*
- * Clean up after ourselves and jump out.
- * xfs_defer_cancel will take care of freeing
- * all these lists and stuff.
- */
- if (ops->finish_cleanup)
- ops->finish_cleanup(*tp, state, error);
- goto out;
- }
- }
- if (error == -EAGAIN) {
- /*
- * Caller wants a fresh transaction, so log a new log
- * intent item to replace the old one and roll the
- * transaction. See "Requesting a Fresh Transaction
- * while Finishing Deferred Work" above.
- */
- dfp->dfp_done = NULL;
- xfs_defer_create_intent(*tp, dfp, false);
- } else {
- /* Done with the dfp, free it. */
- list_del(&dfp->dfp_list);
- kmem_free(dfp);
- }
-
- if (ops->finish_cleanup)
- ops->finish_cleanup(*tp, state, error);
- }
-
-out:
- if (error) {
- xfs_defer_trans_abort(*tp, &dop_pending);
- xfs_force_shutdown((*tp)->t_mountp, SHUTDOWN_CORRUPT_INCORE);
- trace_xfs_defer_finish_error(*tp, error);
- xfs_defer_cancel_list((*tp)->t_mountp, &dop_pending);
- xfs_defer_cancel(*tp);
- return error;
+ error = xfs_defer_finish_one(*tp, dfp);
+ if (error && error != -EAGAIN)
+ goto out_shutdown;
}
trace_xfs_defer_finish_done(*tp, _RET_IP_);
return 0;
+
+out_shutdown:
+ xfs_defer_trans_abort(*tp, &dop_pending);
+ xfs_force_shutdown((*tp)->t_mountp, SHUTDOWN_CORRUPT_INCORE);
+ trace_xfs_defer_finish_error(*tp, error);
+ xfs_defer_cancel_list((*tp)->t_mountp, &dop_pending);
+ xfs_defer_cancel(*tp);
+ return error;
}
int
--
2.26.2
next prev parent reply other threads:[~2020-04-29 15:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-29 15:05 deferred operations cleanup Christoph Hellwig
2020-04-29 15:05 ` [PATCH 01/11] xfs: remove the xfs_efi_log_item_t typedef Christoph Hellwig
2020-04-30 11:02 ` Brian Foster
2020-04-29 15:05 ` [PATCH 02/11] xfs: remove the xfs_efd_log_item_t typedef Christoph Hellwig
2020-04-30 11:03 ` Brian Foster
2020-04-29 15:05 ` [PATCH 03/11] xfs: remove the xfs_inode_log_item_t typedef Christoph Hellwig
2020-04-30 11:03 ` Brian Foster
2020-04-29 15:05 ` [PATCH 04/11] xfs: factor out a xfs_defer_create_intent helper Christoph Hellwig
2020-04-30 11:03 ` Brian Foster
2020-04-29 15:05 ` [PATCH 05/11] xfs: merge the ->log_item defer op into ->create_intent Christoph Hellwig
2020-04-30 11:04 ` Brian Foster
2020-04-29 15:05 ` [PATCH 06/11] xfs: merge the ->diff_items " Christoph Hellwig
2020-04-30 11:04 ` Brian Foster
2020-04-29 15:05 ` [PATCH 07/11] xfs: turn dfp_intent into a xfs_log_item Christoph Hellwig
2020-04-30 11:04 ` Brian Foster
2020-04-29 15:05 ` Christoph Hellwig [this message]
2020-04-30 11:04 ` [PATCH 08/11] xfs: refactor xfs_defer_finish_noroll Brian Foster
2020-04-29 15:05 ` [PATCH 09/11] xfs: turn dfp_done into a xfs_log_item Christoph Hellwig
2020-04-30 11:04 ` Brian Foster
2020-04-29 15:05 ` [PATCH 10/11] xfs: use a xfs_btree_cur for the ->finish_cleanup state Christoph Hellwig
2020-04-30 11:04 ` Brian Foster
2020-04-29 15:05 ` [PATCH 11/11] xfs: spell out the parameter name for ->cancel_item Christoph Hellwig
2020-04-30 11:04 ` Brian Foster
2020-04-30 15:35 ` deferred operations cleanup Darrick J. Wong
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