Add ioctl to get resync speed, userspace tool
is dmsetup status:
dmsetup status $device
e.g.
dmsetup status /dev/dm-2
Signed-off-by: Guangliang Zhao <gzhao@xxxxxxxx>
---
drivers/md/dm-raid1.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 3cdad37..62acfa3 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -1427,6 +1427,20 @@ static char device_status_char(struct mirror *m)
(test_bit(DM_RAID1_READ_ERROR, &(m->error_type))) ? 'R' : 'U';
}
+/*
+ * get speed from ratelimit_state
+ */
+static unsigned int rlimit_to_speed(struct mirror_set *ms,
+ struct ratelimit_state *rl)
+{
+ sector_t region_size = dm_rh_get_region_size(ms->rh);
+ unsigned int time, burst;
+
+ time = rl->interval / HZ;
+ burst = (rl->burst * region_size) >> 1;
+
+ return burst / time;
+}
static int mirror_status(struct dm_target *ti, status_type_t type,
char *result, unsigned int maxlen)
@@ -1451,6 +1465,8 @@ static int mirror_status(struct dm_target *ti, status_type_t type,
sz += log->type->status(log, type, result+sz, maxlen-sz);
+ DMEMIT(" %u", rlimit_to_speed(ms, &ms->ms_rlimit));
+
break;
case STATUSTYPE_TABLE:
--
1.7.10.4
--
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