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| author | Hannes Reinecke <hare@suse.de> | 2020-05-11 11:24:16 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-05-15 17:29:36 +0300 |
| commit | bc3d5717d242a37d2e9ea85d7e7b2e3569324d24 (patch) | |
| tree | 8f03f96efab1336662a15ab9a777543b6f46c8cb /Documentation | |
| parent | 2613eab11996c8d1439c2a44fbca52807be7faa6 (diff) | |
| download | linux-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 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/dm-zoned.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-zoned.rst b/Documentation/admin-guide/device-mapper/dm-zoned.rst index 07f56ebc1730..4165fbf1aeb6 100644 --- a/Documentation/admin-guide/device-mapper/dm-zoned.rst +++ b/Documentation/admin-guide/device-mapper/dm-zoned.rst @@ -144,3 +144,19 @@ underlying zoned block device name. Ex:: echo "0 `blockdev --getsize ${dev}` zoned ${dev}" | \ dmsetup create dmz-`basename ${dev}` + +Information about the internal layout and current usage of the zones can +be obtained with the 'status' callback from dmsetup: + +Ex:: + + dmsetup status /dev/dm-X + +will return a line + + 0 <size> zoned <nr_zones> zones <nr_unmap_rnd>/<nr_rnd> random <nr_unmap_seq>/<nr_seq> sequential + +where <nr_zones> is the total number of zones, <nr_unmap_rnd> is the number +of unmapped (ie free) random zones, <nr_rnd> the total number of zones, +<nr_unmap_seq> the number of unmapped sequential zones, and <nr_seq> the +total number of sequential zones. |