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authorMike Snitzer <snitzer@redhat.com>2009-06-22 10:12:33 +0100
committerAlasdair G Kergon <agk@redhat.com>2009-06-22 10:12:33 +0100
commitaf4874e03ed82f050d5872d8c39ce64bf16b5c38 (patch)
tree38aa5dee43b4bb7a369995d4f38dee992cb051e0 /drivers/md/dm-stripe.c
parent1197764e403d97231eb6da2b1e16f511a7fd3101 (diff)
downloadop-kernel-dev-af4874e03ed82f050d5872d8c39ce64bf16b5c38.zip
op-kernel-dev-af4874e03ed82f050d5872d8c39ce64bf16b5c38.tar.gz
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
Diffstat (limited to 'drivers/md/dm-stripe.c')
-rw-r--r--drivers/md/dm-stripe.c18
1 files changed, 17 insertions, 1 deletions
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 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio,
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)
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