user/sven/linux.git/drivers/block/null_blk.h, branch v5.4.90

null_blk: format pr_* logs with pr_fmt

2019-09-16T14:38:29Z

Instead of writing "null_blk: " at the beginning of each pr_err/info/warn log message, format messages using pr_fmt() macro. Reviewed-by: Chaitanya Kulkarni Signed-off-by: André Almeida Signed-off-by: Jens Axboe

null_blk: fix inline misuse

2019-08-23T18:49:00Z

You can't magically mark a function inline and expect that to work. Fixes: fceb5d1b19cb ("null_blk: create a helper for zoned devices") Signed-off-by: Jens Axboe

null_blk: create a helper for zoned devices

2019-08-23T12:58:05Z

This patch creates a helper function for handling zoned block device operations. This patch also restructured the code for null_blk_zoned.c and uses the pattern to return blk_status_t and catch the error in the function null_handle_cmd() into cmd->error variable instead of setting it up in the deeper layer just like the way it is done for flush, badblocks and memory backed case in the null_handle_cmd(). We also move null_handle_zoned() to the null_blk_zoned.c to keep the zoned code separate. Signed-off-by: Chaitanya Kulkarni Signed-off-by: Jens Axboe

null_blk: fixup ->report_zones() for !CONFIG_BLK_DEV_ZONED

2019-07-12T15:09:57Z

A previous commit changed the prototype, but didn't adjust the function for when zoned device support is disabled. Fix it up. Fixes: bd976e527259 ("block: Kill gfp_t argument of blkdev_report_zones()") Signed-off-by: Jens Axboe

block: Kill gfp_t argument of blkdev_report_zones()

2019-07-12T02:04:37Z

Only GFP_KERNEL and GFP_NOIO are used with blkdev_report_zones(). In preparation of using vmalloc() for large report buffer and zone array allocations used by this function, remove its "gfp_t gfp_mask" argument and rely on the caller context to use memalloc_noio_save/restore() where necessary (block layer zone revalidation and dm-zoned I/O error path). Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe

null_blk: add zoned config support information

2019-01-06T17:58:27Z

If the kernel is built without CONFIG_BLK_DEV_ZONED, a modprobe of the null_blk driver with zoned=1 fails with 'Invalid argument'. This can be confusing to users, prompting a search as to why the parameter is invalid. To assist in that search, add a bit more information to the failure, additionally adding to the documentation that CONFIG_BLK_DEV_ZONED is needed for zoned=1. Reviewed-by: Bart Van Assche Signed-off-by: John Pittman Added null_blk prefix to error message. Signed-off-by: Jens Axboe

null_blk: Add conventional zone configuration for zoned support

2018-11-07T20:41:50Z

Allow the creation of conventional zones by adding the zone_nr_conv configuration attribute. This new attribute is used only for zoned devices and indicates the number of conventional zones to create. The default value is 0. Since host-managed zoned block devices must always have at least one sequential zone, if the value of zone_nr_conv is larger than or equal to the total number of zones of the device nr_zones, zone_nr_conv is automatically changed to nr_zones - 1. Reviewed-by: Matias Bjorling Reviewed-by: Damien Le Moal Signed-off-by: Masato Suzuki Signed-off-by: Jens Axboe

block: add a report_zones method

2018-10-25T17:17:40Z

Dispatching a report zones command through the request queue is a major pain due to the command reply payload rewriting necessary. Given that blkdev_report_zones() is executing everything synchronously, implement report zones as a block device file operation instead, allowing major simplification of the code in many places. sd, null-blk, dm-linear and dm-flakey being the only block device drivers supporting exposing zoned block devices, these drivers are modified to provide the device side implementation of the report_zones() block device file operation. For device mappers, a new report_zones() target type operation is defined so that the upper block layer calls blkdev_report_zones() can be propagated down to the underlying devices of the dm targets. Implementation for this new operation is added to the dm-linear and dm-flakey targets. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig [Damien] * Changed method block_device argument to gendisk * Various bug fixes and improvements * Added support for null_blk, dm-linear and dm-flakey. Reviewed-by: Martin K. Petersen Reviewed-by: Mike Snitzer Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe

null_blk: fix zoned support for non-rq based operation

2018-09-13T00:21:11Z

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 Signed-off-by: Jens Axboe

null_blk: add zone support

2018-07-09T15:07:55Z

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 Signed-off-by: Bart Van Assche Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe