diff options
| author | Hannes Reinecke <hare@suse.de> | 2020-05-11 10:24:16 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-05-15 10:29:36 -0400 |
| commit | bc3d5717d242a37d2e9ea85d7e7b2e3569324d24 (patch) | |
| tree | 8f03f96efab1336662a15ab9a777543b6f46c8cb /drivers/md/dm-zoned-target.c | |
| parent | 2613eab11996c8d1439c2a44fbca52807be7faa6 (diff) | |
| download | lwn-bc3d5717d242a37d2e9ea85d7e7b2e3569324d24.tar.gz lwn-bc3d5717d242a37d2e9ea85d7e7b2e3569324d24.zip | |
dm zoned: add 'status' callback
Add callback to supply information for 'dmsetup status'
and 'dmsetup table'. The output for 'dmsetup status' is
0 <size> zoned <nr_zones> zones <nr_unmap_rnd>/<nr_rnd> random <nr_unmap_seq>/<nr_seq> sequential
where <nr_unmap_rnd> is the number of unmapped (ie free) random zones,
<nr_rnd> the total number of random zones, <nr_unmap_seq> the number
of unmapped sequential zones, and <nr_seq> the total number of
sequential zones.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-zoned-target.c')
| -rw-r--r-- | drivers/md/dm-zoned-target.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c index f4f83d39b3dc..0b4b27d280fb 100644 --- a/drivers/md/dm-zoned-target.c +++ b/drivers/md/dm-zoned-target.c @@ -965,6 +965,31 @@ static int dmz_iterate_devices(struct dm_target *ti, return fn(ti, dmz->ddev, 0, capacity, data); } +static void dmz_status(struct dm_target *ti, status_type_t type, + unsigned int status_flags, char *result, + unsigned int maxlen) +{ + struct dmz_target *dmz = ti->private; + ssize_t sz = 0; + char buf[BDEVNAME_SIZE]; + + switch (type) { + case STATUSTYPE_INFO: + DMEMIT("%u zones %u/%u random %u/%u sequential", + dmz_nr_zones(dmz->metadata), + dmz_nr_unmap_rnd_zones(dmz->metadata), + dmz_nr_rnd_zones(dmz->metadata), + dmz_nr_unmap_seq_zones(dmz->metadata), + dmz_nr_seq_zones(dmz->metadata)); + break; + case STATUSTYPE_TABLE: + format_dev_t(buf, dmz->dev->bdev->bd_dev); + DMEMIT("%s", buf); + break; + } + return; +} + static struct target_type dmz_type = { .name = "zoned", .version = {1, 1, 0}, @@ -978,6 +1003,7 @@ static struct target_type dmz_type = { .postsuspend = dmz_suspend, .resume = dmz_resume, .iterate_devices = dmz_iterate_devices, + .status = dmz_status, }; static int __init dmz_init(void) |