Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v4.19.16 2018-09-13T00:21:11+00:00 2018-09-13T00:21:11+00:00 Jens Axboe axboe@kernel.dk 2018-09-13T00:21:11+00:00 urn:sha1:b228ba1cb95afbaeeb86cf06cd9fd6f6369c3b14 The supported added for zones in null_blk seem to assume that only rq based operation is possible. But this depends on the queue_mode setting, if this is set to 0, then cmd->bio is what we need to be operating on. Right now any attempt to load null_blk with queue_mode=0 will insta-crash, since cmd->rq is NULL and null_handle_cmd() assumes it to always be set. Make the zoned code deal with bio's instead, or pass in the appropriate sector/nr_sectors instead. Fixes: ca4b2a011948 ("null_blk: add zone support") Tested-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> 2018-07-09T15:07:55+00:00 Matias Bjørling matias.bjorling@wdc.com 2018-07-06T17:38:39+00:00 urn:sha1:ca4b2a011948fae4e4d31490107db4926385a983 Adds support for exposing a null_blk device through the zone device interface. The interface is managed with the parameters zoned and zone_size. If zoned is set, the null_blk instance registers as a zoned block device. The zone_size parameter defines how big each zone will be. Signed-off-by: Matias Bjørling <matias.bjorling@wdc.com> Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> 2018-07-09T15:07:54+00:00 Matias Bjørling matias.bjorling@wdc.com 2018-07-06T17:38:38+00:00 urn:sha1:6dad38d38f20c0c8a84b5ae4f23c62b2c8758ec5 Split the null_blk device driver, such that it can prepare for zoned block interface support. Signed-off-by: Matias Bjørling <matias.bjorling@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>