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| author |   Damien Le Moal <damien.lemoal@wdc.com> | 2019-11-11 11:39:25 +0900 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-11-12 19:11:57 -0700 |
| commit | 5eac3eb30c9ab9ee7fe2bd9aa9db6373cabb77f8 (patch) | |
| tree | d748a76fbb49647100e675848603b46b124e5746 /drivers/md/dm.c | |
| parent | block: Simplify report zones execution (diff) | |
| download | linux-dev-5eac3eb30c9ab9ee7fe2bd9aa9db6373cabb77f8.tar.xz linux-dev-5eac3eb30c9ab9ee7fe2bd9aa9db6373cabb77f8.zip | |
block: Remove partition support for zoned block devices
No known partitioning tool supports zoned block devices, especially the
host managed flavor with strong sequential write constraints.
Furthermore, there are also no known user nor use cases for partitioned
zoned block devices.
This patch removes partition device creation for zoned block devices,
which allows simplifying the processing of zone commands for zoned
block devices. A warning is added if a partition table is found on the
device.
For report zones operations no zone sector information remapping is
necessary anymore, simplifying the code. Of note is that remapping of
zone reports for DM targets is still necessary as done by
dm_remap_zone_report().
Similarly, remaping of a zone reset bio is not necessary anymore.
Testing for the applicability of the zone reset all request also becomes
simpler and only needs to check that the number of sectors of the
requested zone range is equal to the disk capacity.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 89189c29438f..76f4cfdd6b41 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1211,9 +1211,6 @@ EXPORT_SYMBOL_GPL(dm_accept_partial_bio); * The zone descriptors obtained with a zone report indicate * zone positions within the underlying device of the target. The zone * descriptors must be remapped to match their position within the dm device. - * The caller target should obtain the zones information using - * blkdev_report_zones() to ensure that remapping for partition offset is - * already handled. */ void dm_remap_zone_report(struct dm_target *ti, sector_t start, struct blk_zone *zones, unsigned int *nr_zones) |