xfs: move xfs_quiesce_attr() into xfs_super.c

Both callers of xfs_quiesce_attr() are in xfs_super.c, and there's
nothing really sync-specific about this functionality so it doesn't
really matter where it lives. Move it to benext to it's callers, so
all the remount/sync_fs code is in the one place.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

3 files changed, 67 insertions, 68 deletions

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index b5e445a13f7b..3bafe66227fb 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1148,6 +1148,73 @@ xfs_restore_resvblks(struct xfs_mount *mp)
         xfs_reserve_blocks(mp, &resblks, NULL);
 }
 
+/*
+ * Trigger writeback of all the dirty metadata in the file system.
+ *
+ * This ensures that the metadata is written to their location on disk rather
+ * than just existing in transactions in the log. This means after a quiesce
+ * there is no log replay required to write the inodes to disk (this is the main
+ * difference between a sync and a quiesce).
+ *
+ * This shoul deffectively mimic the code in xfs_unmountfs() and
+ * xfs_log_umount() but without tearing down any structures.
+ * XXX: bug fixes needed!
+ *
+ * Note: this stops background log work - the callers must ensure it is started
+ * again when appropriate.
+ */
+void
+xfs_quiesce_attr(
+        struct xfs_mount        *mp)
+{
+        int     error = 0;
+
+        /* wait for all modifications to complete */
+        while (atomic_read(&mp->m_active_trans) > 0)
+                delay(100);
+
+        /* force the log to unpin objects from the now complete transactions */
+        xfs_log_force(mp, XFS_LOG_SYNC);
+
+        /* reclaim inodes to do any IO before the freeze completes */
+        xfs_reclaim_inodes(mp, 0);
+        xfs_reclaim_inodes(mp, SYNC_WAIT);
+
+        /* flush all pending changes from the AIL */
+        xfs_ail_push_all_sync(mp->m_ail);
+
+        /* stop background log work */
+        cancel_delayed_work_sync(&mp->m_log->l_work);
+
+        /*
+         * Just warn here till VFS can correctly support
+         * read-only remount without racing.
+         */
+        WARN_ON(atomic_read(&mp->m_active_trans) != 0);
+
+        /* Push the superblock and write an unmount record */
+        error = xfs_log_sbcount(mp);
+        if (error)
+                xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
+                                "Frozen image may not be consistent.");
+        xfs_log_unmount_write(mp);
+
+        /*
+         * At this point we might have modified the superblock again and thus
+         * added an item to the AIL, thus flush it again.
+         */
+        xfs_ail_push_all_sync(mp->m_ail);
+
+        /*
+         * The superblock buffer is uncached and xfsaild_push() will lock and
+         * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait()
+         * here but a lock on the superblock buffer will block until iodone()
+         * has completed.
+         */
+        xfs_buf_lock(mp->m_sb_bp);
+        xfs_buf_unlock(mp->m_sb_bp);
+}
+
 STATIC int
 xfs_fs_remount(
         struct super_block      *sb,
diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c
index 581eb59a85b5..7b630288bab5 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_sync.c
@@ -215,71 +215,6 @@ xfs_inode_ag_iterator(
 }
 
 /*
- * Second stage of a quiesce. The data is already synced, now we have to take
- * care of the metadata. New transactions are already blocked, so we need to
- * wait for any remaining transactions to drain out before proceeding.
- *
- * The second phase ensures that the inodes are written to their
- * location on disk rather than just existing in transactions in the log. This
- * means after a quiesce there is no log replay required to write the inodes to
- * disk (this is the main difference between a sync and a quiesce).
- *
- * Note: this stops background sync work - the callers must ensure it is started
- * again when appropriate.
- */
-void
-xfs_quiesce_attr(
-        struct xfs_mount        *mp)
-{
-        int     error = 0;
-
-        /* wait for all modifications to complete */
-        while (atomic_read(&mp->m_active_trans) > 0)
-                delay(100);
-
-        /* force the log to unpin objects from the now complete transactions */
-        xfs_log_force(mp, XFS_LOG_SYNC);
-
-        /* reclaim inodes to do any IO before the freeze completes */
-        xfs_reclaim_inodes(mp, 0);
-        xfs_reclaim_inodes(mp, SYNC_WAIT);
-
-        /* flush all pending changes from the AIL */
-        xfs_ail_push_all_sync(mp->m_ail);
-
-        /* stop background log work */
-        cancel_delayed_work_sync(&mp->m_log->l_work);
-
-        /*
-         * Just warn here till VFS can correctly support
-         * read-only remount without racing.
-         */
-        WARN_ON(atomic_read(&mp->m_active_trans) != 0);
-
-        /* Push the superblock and write an unmount record */
-        error = xfs_log_sbcount(mp);
-        if (error)
-                xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
-                                "Frozen image may not be consistent.");
-        xfs_log_unmount_write(mp);
-
-        /*
-         * At this point we might have modified the superblock again and thus
-         * added an item to the AIL, thus flush it again.
-         */
-        xfs_ail_push_all_sync(mp->m_ail);
-
-        /*
-         * The superblock buffer is uncached and xfsaild_push() will lock and
-         * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait()
-         * here but a lock on the superblock buffer will block until iodone()
-         * has completed.
-         */
-        xfs_buf_lock(mp->m_sb_bp);
-        xfs_buf_unlock(mp->m_sb_bp);
-}
-
-/*
  * Queue a new inode reclaim pass if there are reclaimable inodes and there
  * isn't a reclaim pass already in progress. By default it runs every 5s based
  * on the xfs periodic sync default of 30s. Perhaps this should have it's own
diff --git a/fs/xfs/xfs_sync.h b/fs/xfs/xfs_sync.h
index 0beabea99e73..0ba9c89c316e 100644
--- a/fs/xfs/xfs_sync.h
+++ b/fs/xfs/xfs_sync.h
@@ -26,9 +26,6 @@ struct xfs_perag;
 
 void xfs_reclaim_worker(struct work_struct *work);
 
-int xfs_quiesce_data(struct xfs_mount *mp);
-void xfs_quiesce_attr(struct xfs_mount *mp);
-
 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
 int xfs_reclaim_inodes_count(struct xfs_mount *mp);
 void xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);