diff options
| author | Ajay Joshi <ajay.joshi@wdc.com> | 2019-10-17 14:19:43 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-10-17 19:01:22 -0600 |
| commit | dd85b4922de1b70f0729d2a7856db619e210a8ec (patch) | |
| tree | 10baad9693e32ac04eafed70feef99317b6a8e1b /drivers/block/null_blk.h | |
| parent | 45919fbfe1c487c17ea1d198534339a5e8abeae3 (diff) | |
| download | linux-dd85b4922de1b70f0729d2a7856db619e210a8ec.tar.bz2 | |
null_blk: return fixed zoned reads > write pointer
A zoned block device maintains a write pointer within a zone, and reads
beyond the write pointer are undefined. Fill data buffer returned above
the write pointer with 0xFF.
Signed-off-by: Ajay Joshi <ajay.joshi@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Matias Bjørling <matias.bjorling@wdc.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/null_blk.h')
| -rw-r--r-- | drivers/block/null_blk.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index a235c45e22a7..93c2a3d403da 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -96,6 +96,8 @@ int null_zone_report(struct gendisk *disk, sector_t sector, blk_status_t null_handle_zoned(struct nullb_cmd *cmd, enum req_opf op, sector_t sector, sector_t nr_sectors); +size_t null_zone_valid_read_len(struct nullb *nullb, + sector_t sector, unsigned int len); #else static inline int null_zone_init(struct nullb_device *dev) { @@ -115,5 +117,11 @@ static inline blk_status_t null_handle_zoned(struct nullb_cmd *cmd, { return BLK_STS_NOTSUPP; } +static inline size_t null_zone_valid_read_len(struct nullb *nullb, + sector_t sector, + unsigned int len) +{ + return len; +} #endif /* CONFIG_BLK_DEV_ZONED */ #endif /* __NULL_BLK_H */ |