diff options
| author | Hannes Reinecke <hare@suse.de> | 2020-05-11 11:24:30 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-05-21 00:09:43 +0300 |
| commit | bd5c40313a1467e4683d92456fc5219d94823f24 (patch) | |
| tree | a31a375c24e02dba81faa6daf64204e63e0190fb /drivers/md/dm-zoned.h | |
| parent | dc076c838f65723325001c977b39e55fc6ba0fa7 (diff) | |
| download | linux-bd5c40313a1467e4683d92456fc5219d94823f24.tar.xz | |
dm zoned: metadata version 2
Implement handling for metadata version 2. The new metadata adds a
label and UUID for the device mapper device, and additional UUID for
the underlying block devices.
It also allows for an additional regular drive to be used for
emulating random access zones. The emulated zones will be placed
logically in front of the zones from the zoned block device, causing
the superblocks and metadata to be stored on that device.
The first zone of the original zoned device will be used to hold
another, tertiary copy of the metadata; this copy carries a generation
number of 0 and is never updated; it's just used for identification.
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.h')
| -rw-r--r-- | drivers/md/dm-zoned.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h index 2629bd51fa26..4971a765be55 100644 --- a/drivers/md/dm-zoned.h +++ b/drivers/md/dm-zoned.h @@ -52,10 +52,12 @@ struct dmz_dev { struct block_device *bdev; char name[BDEVNAME_SIZE]; + uuid_t uuid; sector_t capacity; unsigned int nr_zones; + unsigned int zone_offset; unsigned int flags; @@ -69,6 +71,7 @@ struct dmz_dev { /* Device flags. */ #define DMZ_BDEV_DYING (1 << 0) #define DMZ_CHECK_BDEV (2 << 0) +#define DMZ_BDEV_REGULAR (4 << 0) /* * Zone descriptor. @@ -163,8 +166,8 @@ struct dmz_reclaim; /* * Functions defined in dm-zoned-metadata.c */ -int dmz_ctr_metadata(struct dmz_dev *dev, struct dmz_metadata **zmd, - const char *devname); +int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, + struct dmz_metadata **zmd, const char *devname); void dmz_dtr_metadata(struct dmz_metadata *zmd); int dmz_resume_metadata(struct dmz_metadata *zmd); |