null_blk: return fixed zoned reads > write pointer

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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>

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Ajay Joshi 2019-10-17 14:19:43 -07:00 • committed by Jens Axboe

parent 45919fbfe1

commit dd85b4922d

3 changed files with 52 additions and 3 deletions

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8

drivers/block/null_blk.h

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26

drivers/block/null_blk_main.c

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21

drivers/block/null_blk_zoned.c

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