dm snapshot: implement iterate devices

[karo-tx-linux.git] / drivers / md / dm-snap.c

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index d573165cd2b788968f7d274e03966b96c93da889..57f1bf7f3b7a1d4ffd18f51563a2d5c52b0693ad 100644 (file)
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1176,6 +1176,15 @@ static int snapshot_status(struct dm_target *ti, status_type_t type,
        return 0;
 }
 
+static int snapshot_iterate_devices(struct dm_target *ti,
+                                   iterate_devices_callout_fn fn, void *data)
+{
+       struct dm_snapshot *snap = ti->private;
+
+       return fn(ti, snap->origin, 0, ti->len, data);
+}
+
+
 /*-----------------------------------------------------------------
  * Origin methods
  *---------------------------------------------------------------*/
@@ -1410,20 +1419,29 @@ static int origin_status(struct dm_target *ti, status_type_t type, char *result,
        return 0;
 }
 
+static int origin_iterate_devices(struct dm_target *ti,
+                                 iterate_devices_callout_fn fn, void *data)
+{
+       struct dm_dev *dev = ti->private;
+
+       return fn(ti, dev, 0, ti->len, data);
+}
+
 static struct target_type origin_target = {
        .name    = "snapshot-origin",
-       .version = {1, 6, 0},
+       .version = {1, 7, 0},
        .module  = THIS_MODULE,
        .ctr     = origin_ctr,
        .dtr     = origin_dtr,
        .map     = origin_map,
        .resume  = origin_resume,
        .status  = origin_status,
+       .iterate_devices = origin_iterate_devices,
 };
 
 static struct target_type snapshot_target = {
        .name    = "snapshot",
-       .version = {1, 6, 0},
+       .version = {1, 7, 0},
        .module  = THIS_MODULE,
        .ctr     = snapshot_ctr,
        .dtr     = snapshot_dtr,
@@ -1431,6 +1449,7 @@ static struct target_type snapshot_target = {
        .end_io  = snapshot_end_io,
        .resume  = snapshot_resume,
        .status  = snapshot_status,
+       .iterate_devices = snapshot_iterate_devices,
 };
 
 static int __init dm_snapshot_init(void)