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authorDamien Le Moal2021-01-28 13:47:31 +0900
committerJens Axboe2021-02-10 07:44:41 -0700
commit0f1ba5f5d80f84b605e70cf4661cb1a44a3c02a6 (patch)
treed6af60d42bc17bd961561e4ce88a9fac3c12db10 /fs/zonefs
parenta805a4fa4fa376bbc145762bb8b09caa2fa8af48 (diff)
zonefs: use zone write granularity as block size
Zoned block devices have different granularity constraints for write operations into sequential zones. E.g. ZBC and ZAC devices require that writes be aligned to the device physical block size while NVMe ZNS devices allow logical block size aligned write operations. To correctly handle such difference, use the device zone write granularity limit to set the block size of a zonefs volume, thus allowing the smallest possible write unit for all zoned device types. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@edc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/zonefs')
-rw-r--r--fs/zonefs/super.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index ab68e27bb322..b9fb55b250ae 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -1581,12 +1581,11 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
/*
- * The block size is set to the device physical sector size to ensure
- * that write operations on 512e devices (512B logical block and 4KB
- * physical block) are always aligned to the device physical blocks,
- * as mandated by the ZBC/ZAC specifications.
+ * The block size is set to the device zone write granularity to ensure
+ * that write operations are always aligned according to the device
+ * interface constraints.
*/
- sb_set_blocksize(sb, bdev_physical_block_size(sb->s_bdev));
+ sb_set_blocksize(sb, bdev_zone_write_granularity(sb->s_bdev));
sbi->s_zone_sectors_shift = ilog2(bdev_zone_sectors(sb->s_bdev));
sbi->s_uid = GLOBAL_ROOT_UID;
sbi->s_gid = GLOBAL_ROOT_GID;