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authorHannes Reinecke <hare@suse.de>2020-05-11 11:24:16 +0300
committerMike Snitzer <snitzer@redhat.com>2020-05-15 17:29:36 +0300
commitbc3d5717d242a37d2e9ea85d7e7b2e3569324d24 (patch)
tree8f03f96efab1336662a15ab9a777543b6f46c8cb /drivers/md/dm-zoned-target.c
parent2613eab11996c8d1439c2a44fbca52807be7faa6 (diff)
downloadlinux-bc3d5717d242a37d2e9ea85d7e7b2e3569324d24.tar.xz
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.c26
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)