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authorDave Chinner <dchinner@redhat.com>2010-12-20 04:36:15 +0300
committerDave Chinner <david@fromorbit.com>2010-12-20 04:36:15 +0300
commit9552e7f2f3dd13a7580e488a7a3582332daad4f5 (patch)
tree2568a24be0a0b933277e1bc71b849ccfffab6abf
parente60599492990d1b52c70e9ed2f8e062fe11ca937 (diff)
downloadlinux-9552e7f2f3dd13a7580e488a7a3582332daad4f5.tar.xz
xfs: use AIL bulk delete function to implement single delete
We now have two copies of AIL delete operations that are mostly duplicate functionality. The single log item deletes can be implemented via the bulk updates by turning xfs_trans_ail_delete() into a simple wrapper. This removes all the duplicate delete functionality and associated helpers. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
-rw-r--r--fs/xfs/xfs_trans_ail.c65
-rw-r--r--fs/xfs/xfs_trans_priv.h18
2 files changed, 11 insertions, 72 deletions
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 8481a5a6d6c2..c5bbbc45db91 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -523,70 +523,6 @@ xfs_trans_ail_update_bulk(
}
/*
- * Delete the given item from the AIL. It must already be in
- * the AIL.
- *
- * Wakeup anyone with an lsn less than item's lsn. If the item
- * we delete in the AIL is the minimum one, update the tail lsn in the
- * log manager.
- *
- * Clear the IN_AIL flag from the item, reset its lsn to 0, and
- * bump the AIL's generation count to indicate that the tree
- * has changed.
- *
- * This function must be called with the AIL lock held. The lock
- * is dropped before returning.
- */
-void
-xfs_trans_ail_delete(
- struct xfs_ail *ailp,
- xfs_log_item_t *lip) __releases(ailp->xa_lock)
-{
- xfs_log_item_t *mlip;
- xfs_lsn_t tail_lsn;
-
- if (lip->li_flags & XFS_LI_IN_AIL) {
- mlip = xfs_ail_min(ailp);
- xfs_ail_delete(ailp, lip);
-
-
- lip->li_flags &= ~XFS_LI_IN_AIL;
- lip->li_lsn = 0;
-
- if (mlip == lip) {
- mlip = xfs_ail_min(ailp);
- /*
- * It is not safe to access mlip after the AIL lock
- * is dropped, so we must get a copy of li_lsn
- * before we do so. This is especially important
- * on 32-bit platforms where accessing and updating
- * 64-bit values like li_lsn is not atomic.
- */
- tail_lsn = mlip ? mlip->li_lsn : 0;
- spin_unlock(&ailp->xa_lock);
- xfs_log_move_tail(ailp->xa_mount, tail_lsn);
- } else {
- spin_unlock(&ailp->xa_lock);
- }
- }
- else {
- /*
- * If the file system is not being shutdown, we are in
- * serious trouble if we get to this stage.
- */
- struct xfs_mount *mp = ailp->xa_mount;
-
- spin_unlock(&ailp->xa_lock);
- if (!XFS_FORCED_SHUTDOWN(mp)) {
- xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp,
- "%s: attempting to delete a log item that is not in the AIL",
- __func__);
- xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
- }
- }
-}
-
-/*
* xfs_trans_ail_delete_bulk - remove multiple log items from the AIL
*
* @xfs_trans_ail_delete_bulk takes an array of log items that all need to
@@ -660,7 +596,6 @@ xfs_trans_ail_delete_bulk(
xfs_log_move_tail(ailp->xa_mount, tail_lsn);
}
-
/*
* The active item list (AIL) is a doubly linked list of log
* items sorted by ascending lsn. The base of the list is
diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index f46920589ca5..35162c238fa3 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -87,13 +87,17 @@ xfs_trans_ail_update(
xfs_trans_ail_update_bulk(ailp, &lip, 1, lsn);
}
-void xfs_trans_ail_delete(struct xfs_ail *ailp,
- struct xfs_log_item *lip)
- __releases(ailp->xa_lock);
-void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp,
- struct xfs_log_item **log_items,
- int nr_items)
- __releases(ailp->xa_lock);
+void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp,
+ struct xfs_log_item **log_items, int nr_items)
+ __releases(ailp->xa_lock);
+static inline void
+xfs_trans_ail_delete(
+ struct xfs_ail *ailp,
+ xfs_log_item_t *lip) __releases(ailp->xa_lock)
+{
+ xfs_trans_ail_delete_bulk(ailp, &lip, 1);
+}
+
void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t);
void xfs_trans_unlocked_item(struct xfs_ail *,
xfs_log_item_t *);