Register .sync_fs handler

[zfs.git] / module / zfs / zfs_vfsops.c

diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c
index ea7e9ce..1e8e6af 100644 (file)
--- a/module/zfs/zfs_vfsops.c
+++ b/module/zfs/zfs_vfsops.c
@@ -69,8 +69,10 @@
 
 /*ARGSUSED*/
 int
-zfs_sync(zfs_sb_t *zsb, short flag, cred_t *cr)
+zfs_sync(struct super_block *sb, int wait, cred_t *cr)
 {
+       zfs_sb_t *zsb = sb->s_fs_info;
+
        /*
         * Data integrity is job one.  We don't want a compromised kernel
         * writing to the storage pool, so we never sync during panic.
@@ -78,6 +80,13 @@ zfs_sync(zfs_sb_t *zsb, short flag, cred_t *cr)
        if (unlikely(oops_in_progress))
                return (0);
 
+       /*
+        * Semantically, the only requirement is that the sync be initiated.
+        * The DMU syncs out txgs frequently, so there's nothing to do.
+        */
+       if (!wait)
+               return (0);
+
        if (zsb != NULL) {
                /*
                 * Sync a specific filesystem.
@@ -87,19 +96,14 @@ zfs_sync(zfs_sb_t *zsb, short flag, cred_t *cr)
                ZFS_ENTER(zsb);
                dp = dmu_objset_pool(zsb->z_os);
 
-#ifdef HAVE_SHUTDOWN
                /*
                 * If the system is shutting down, then skip any
                 * filesystems which may exist on a suspended pool.
-                *
-                * XXX: This can be implemented using the Linux reboot
-                *      notifiers: {un}register_reboot_notifier().
                 */
-               if (sys_shutdown && spa_suspended(dp->dp_spa)) {
+               if (spa_suspended(dp->dp_spa)) {
                        ZFS_EXIT(zsb);
                        return (0);
                }
-#endif /* HAVE_SHUTDOWN */
 
                if (zsb->z_log != NULL)
                        zil_commit(zsb->z_log, 0);