[PATCH 17/28] xfs: refactor recovered BUI log item playback

Darrick J. Wong
2020-05-05T01:12:29Z

From: Darrick J. Wong <darrick.wong@oracle.com>

Move the code that processes the log items created from the recovered
log items into the per-item source code files and use dispatch functions
to call them. No functional changes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/xfs_bmap_item.c | 44 ++++++++++++++++++----
fs/xfs/xfs_bmap_item.h | 3 --
fs/xfs/xfs_log_recover.c | 91 ++++++----------------------------------------
3 files changed, 47 insertions(+), 91 deletions(-)

diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index 0fbebef69e26..f88ebf8634c4 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -28,6 +28,8 @@
kmem_zone_t *xfs_bui_zone;
kmem_zone_t *xfs_bud_zone;

+static const struct xfs_item_ops xfs_bui_item_ops;
+
static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_bui_log_item, bui_item);
@@ -47,7 +49,7 @@ xfs_bui_item_free(
* committed vs unpin operations in bulk insert operations. Hence the reference
* count to ensure only the last caller frees the BUI.
*/
-void
+STATIC void
xfs_bui_release(
struct xfs_bui_log_item *buip)
{
@@ -126,13 +128,6 @@ xfs_bui_item_release(
xfs_bui_release(BUI_ITEM(lip));
}

-static const struct xfs_item_ops xfs_bui_item_ops = {
- .iop_size = xfs_bui_item_size,
- .iop_format = xfs_bui_item_format,
- .iop_unpin = xfs_bui_item_unpin,
- .iop_release = xfs_bui_item_release,
-};
-
/*
* Allocate and initialize an bui item with the given number of extents.
*/
@@ -425,7 +420,7 @@ const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
* Process a bmap update intent item that was recovered from the log.
* We need to update some inode's bmbt.
*/
-int
+STATIC int
xfs_bui_recover(
struct xfs_trans *parent_tp,
struct xfs_bui_log_item *buip)
@@ -560,6 +555,37 @@ xfs_bui_recover(
return error;
}

+/* Recover the BUI if necessary. */
+STATIC int
+xfs_bui_item_recover(
+ struct xfs_log_item *lip,
+ struct xfs_trans *tp)
+{
+ struct xfs_ail *ailp = lip->li_ailp;
+ struct xfs_bui_log_item *buip = BUI_ITEM(lip);
+ int error;
+
+ /*
+ * Skip BUIs that we've already processed.
+ */
+ if (test_bit(XFS_BUI_RECOVERED, &buip->bui_flags))
+ return 0;
+
+ spin_unlock(&ailp->ail_lock);
+ error = xfs_bui_recover(tp, buip);
+ spin_lock(&ailp->ail_lock);
+
+ return error;
+}
+
+static const struct xfs_item_ops xfs_bui_item_ops = {
+ .iop_size = xfs_bui_item_size,
+ .iop_format = xfs_bui_item_format,
+ .iop_unpin = xfs_bui_item_unpin,
+ .iop_release = xfs_bui_item_release,
+ .iop_recover = xfs_bui_item_recover,
+};
+
/*
* Copy an BUI format buffer from the given buf, and into the destination
* BUI format structure. The BUI/BUD items were designed not to need any
diff --git a/fs/xfs/xfs_bmap_item.h b/fs/xfs/xfs_bmap_item.h
index 515b1d5d6ab7..44d06e62f8f9 100644
--- a/fs/xfs/xfs_bmap_item.h
+++ b/fs/xfs/xfs_bmap_item.h
@@ -74,7 +74,4 @@ struct xfs_bud_log_item {
extern struct kmem_zone *xfs_bui_zone;
extern struct kmem_zone *xfs_bud_zone;

-void xfs_bui_release(struct xfs_bui_log_item *);
-int xfs_bui_recover(struct xfs_trans *parent_tp, struct xfs_bui_log_item *buip);
-
#endif /* __XFS_BMAP_ITEM_H__ */
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index ad5ac97ed0c7..20ee32c2652d 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -2553,60 +2553,6 @@ xlog_recover_process_data(
return 0;
}

-/* Recover the BUI if necessary. */
-STATIC int
-xlog_recover_process_bui(
- struct xfs_trans *parent_tp,
- struct xfs_ail *ailp,
- struct xfs_log_item *lip)
-{
- struct xfs_bui_log_item *buip;
- int error;
-
- /*
- * Skip BUIs that we've already processed.
- */
- buip = container_of(lip, struct xfs_bui_log_item, bui_item);
- if (test_bit(XFS_BUI_RECOVERED, &buip->bui_flags))
- return 0;
-
- spin_unlock(&ailp->ail_lock);
- error = xfs_bui_recover(parent_tp, buip);
- spin_lock(&ailp->ail_lock);
-
- return error;
-}
-
-/* Release the BUI since we're cancelling everything. */
-STATIC void
-xlog_recover_cancel_bui(
- struct xfs_mount *mp,
- struct xfs_ail *ailp,
- struct xfs_log_item *lip)
-{
- struct xfs_bui_log_item *buip;
-
- buip = container_of(lip, struct xfs_bui_log_item, bui_item);
-
- spin_unlock(&ailp->ail_lock);
- xfs_bui_release(buip);
- spin_lock(&ailp->ail_lock);
-}
-
-/* Is this log item a deferred action intent? */
-static inline bool xlog_item_is_intent(struct xfs_log_item *lip)
-{
- switch (lip->li_type) {
- case XFS_LI_EFI:
- case XFS_LI_RUI:
- case XFS_LI_CUI:
- case XFS_LI_BUI:
- return true;
- default:
- return false;
- }
-}
-
/* Take all the collected deferred ops and finish them in order. */
static int
xlog_finish_defer_ops(
@@ -2641,6 +2587,12 @@ xlog_finish_defer_ops(
return xfs_trans_commit(tp);
}

+/* Is this log item a deferred action intent? */
+static inline bool xlog_item_is_intent(struct xfs_log_item *lip)
+{
+ return lip->li_ops->iop_recover != NULL;
+}
+
/*
* When this is called, all of the log intent items which did not have
* corresponding log done items should be in the AIL. What we do now
@@ -2711,20 +2663,11 @@ xlog_recover_process_intents(

/*
* NOTE: If your intent processing routine can create more
- * deferred ops, you /must/ attach them to the dfops in this
- * routine or else those subsequent intents will get
+ * deferred ops, you /must/ attach them to the transaction in
+ * this routine or else those subsequent intents will get
* replayed in the wrong order!
*/
- switch (lip->li_type) {
- case XFS_LI_EFI:
- case XFS_LI_RUI:
- case XFS_LI_CUI:
- error = lip->li_ops->iop_recover(lip, parent_tp);
- break;
- case XFS_LI_BUI:
- error = xlog_recover_process_bui(parent_tp, ailp, lip);
- break;
- }
+ error = lip->li_ops->iop_recover(lip, parent_tp);
if (error)
goto out;
lip = xfs_trans_ail_cursor_next(ailp, &cur);
@@ -2767,19 +2710,9 @@ xlog_recover_cancel_intents(
break;
}

- switch (lip->li_type) {
- case XFS_LI_EFI:
- case XFS_LI_RUI:
- case XFS_LI_CUI:
- spin_unlock(&ailp->ail_lock);
- lip->li_ops->iop_release(lip);
- spin_lock(&ailp->ail_lock);
- break;
- case XFS_LI_BUI:
- xlog_recover_cancel_bui(log->l_mp, ailp, lip);
- break;
- }
-
+ spin_unlock(&ailp->ail_lock);
+ lip->li_ops->iop_release(lip);
+ spin_lock(&ailp->ail_lock);
lip = xfs_trans_ail_cursor_next(ailp, &cur);
}