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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-delay.c
parent1197764e403d97231eb6da2b1e16f511a7fd3101 (diff)
downloadlinaro-lsk-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-delay.c')
-rw-r--r--drivers/md/dm-delay.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index 8ad8a9044bb..4e5b843cd4d 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -318,9 +318,26 @@ static int delay_status(struct dm_target *ti, status_type_t type,
return 0;
}
+static int delay_iterate_devices(struct dm_target *ti,
+ iterate_devices_callout_fn fn, void *data)
+{
+ struct delay_c *dc = ti->private;
+ int ret = 0;
+
+ ret = fn(ti, dc->dev_read, dc->start_read, data);
+ if (ret)
+ goto out;
+
+ if (dc->dev_write)
+ ret = fn(ti, dc->dev_write, dc->start_write, data);
+
+out:
+ return ret;
+}
+
static struct target_type delay_target = {
.name = "delay",
- .version = {1, 0, 2},
+ .version = {1, 1, 0},
.module = THIS_MODULE,
.ctr = delay_ctr,
.dtr = delay_dtr,
@@ -328,6 +345,7 @@ static struct target_type delay_target = {
.presuspend = delay_presuspend,
.resume = delay_resume,
.status = delay_status,
+ .iterate_devices = delay_iterate_devices,
};
static int __init dm_delay_init(void)