From: Chaitanya Kulkarni Date: Wed, 20 May 2020 23:01:52 +0000 (-0700) Subject: null_blk: don't allow discard for zoned mode X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1592cd15eec6e2952453f9a82da6e8a53e2b8db5;p=linux.git null_blk: don't allow discard for zoned mode Zoned block device specification do not define the behavior of discard/trim command as this command is generally replaced by the reset write pointer (zone reset) command. Emulate this in null_blk by making zoned and discard options mutually exclusive. Suggested-by: Damien Le Moal Signed-off-by: Chaitanya Kulkarni Signed-off-by: Jens Axboe --- diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 8efd8778e2095..ce9e33603a4d9 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1535,6 +1535,13 @@ static void null_config_discard(struct nullb *nullb) { if (nullb->dev->discard == false) return; + + if (nullb->dev->zoned) { + nullb->dev->discard = false; + pr_info("discard option is ignored in zoned mode\n"); + return; + } + nullb->q->limits.discard_granularity = nullb->dev->blocksize; nullb->q->limits.discard_alignment = nullb->dev->blocksize; blk_queue_max_discard_sectors(nullb->q, UINT_MAX >> 9);