md: add 'size' as a personality method

[deliverable/linux.git] / drivers / md / multipath.c

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 87accf74e4b4d12cafab31428e4d5810656f3fbe..a3f6d8668bb35af437514ea851dfee8173e3f96b 100644 (file)
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -406,6 +406,14 @@ static void multipathd (mddev_t *mddev)
        spin_unlock_irqrestore(&conf->device_lock, flags);
 }
 
+static sector_t multipath_size(mddev_t *mddev, sector_t sectors, int raid_disks)
+{
+       WARN_ONCE(sectors || raid_disks,
+                 "%s does not support generic reshape\n", __func__);
+
+       return mddev->dev_sectors;
+}
+
 static int multipath_run (mddev_t *mddev)
 {
        multipath_conf_t *conf;
@@ -502,7 +510,7 @@ static int multipath_run (mddev_t *mddev)
        /*
         * Ok, everything is just fine now
         */
-       mddev->array_sectors = mddev->dev_sectors;
+       mddev->array_sectors = multipath_size(mddev, 0, 0);
 
        mddev->queue->unplug_fn = multipath_unplug;
        mddev->queue->backing_dev_info.congested_fn = multipath_congested;
@@ -547,6 +555,7 @@ static struct mdk_personality multipath_personality =
        .error_handler  = multipath_error,
        .hot_add_disk   = multipath_add_disk,
        .hot_remove_disk= multipath_remove_disk,
+       .size           = multipath_size,
 };
 
 static int __init multipath_init (void)