dm target:s introduce iterate devices fn
Add .iterate_devices to 'struct target_type' to allow a function to be
called for all devices in a DM target. Implemented it for all targets
except those in dm-snap.c (origin and snapshot).
(The raid1 version number jumps to 1.12 because we originally reserved
1.1 to 1.11 for 'block_on_error' but ended up using 'handle_errors'
instead.)
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: martin.petersen@oracle.com
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index c64fe82..b240e85 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -313,15 +313,31 @@
return error;
}
+static int stripe_iterate_devices(struct dm_target *ti,
+ iterate_devices_callout_fn fn, void *data)
+{
+ struct stripe_c *sc = ti->private;
+ int ret = 0;
+ unsigned i = 0;
+
+ do
+ ret = fn(ti, sc->stripe[i].dev,
+ sc->stripe[i].physical_start, data);
+ while (!ret && ++i < sc->stripes);
+
+ return ret;
+}
+
static struct target_type stripe_target = {
.name = "striped",
- .version = {1, 1, 0},
+ .version = {1, 2, 0},
.module = THIS_MODULE,
.ctr = stripe_ctr,
.dtr = stripe_dtr,
.map = stripe_map,
.end_io = stripe_end_io,
.status = stripe_status,
+ .iterate_devices = stripe_iterate_devices,
};
int __init dm_stripe_init(void)