linux/drivers/block/rnbd, branch v5.10

block/rnbd-clt: send_msg_close if any error occurs after send_msg_open

2020-10-13T21:05:05Z

After send_msg_open is done, send_msg_close should be done if any error occurs and it is necessary to recover what has been done. Signed-off-by: Gioh Kim Signed-off-by: Jack Wang Signed-off-by: Jens Axboe

block/rnbd-clt: do not cap max_hw_sectors & max_segments with remote device

2020-10-13T21:05:05Z

The max_hw_secotrs is only limited by the transport, not remote device, block layer on server side will split to the device limit if it's too big. The max_segments, similar, and rtrs server will submit single buffer, so no need to cap. Signed-off-by: Jack Wang Signed-off-by: Jens Axboe

block/rnbd-clt: remove nr argument from send_usr_msg

2020-10-13T21:05:05Z

The argument is not needed since all callers pass 1 for it. Signed-off-by: Guoqing Jiang Signed-off-by: Jack Wang Signed-off-by: Jens Axboe

blk-mq: Rename BLK_MQ_F_TAG_SHARED as BLK_MQ_F_TAG_QUEUE_SHARED

2020-09-03T21:20:46Z

BLK_MQ_F_TAG_SHARED actually means that tags is shared among request queues, all of which should belong to LUNs attached to same HBA. So rename it to make the point explicitly. [jpg: rebase a few times, add rnbd-clt.c change] Suggested-by: Bart Van Assche Signed-off-by: Ming Lei Signed-off-by: John Garry Tested-by: Douglas Gilbert Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe

block: add a new revalidate_disk_size helper

2020-09-02T14:00:07Z

revalidate_disk is a relative awkward helper for driver use, as it first calls an optional driver method and then updates the block device size, while most callers either don't need the method call at all, or want to keep state between the caller and the called method. Add a revalidate_disk_size helper that just performs the update of the block device size from the gendisk one, and switch all drivers that do not implement ->revalidate_disk to use the new helper instead of revalidate_disk() Signed-off-by: Christoph Hellwig Reviewed-by: Josef Bacik Reviewed-by: Johannes Thumshirn Acked-by: Song Liu Signed-off-by: Jens Axboe

block/rnbd: Ensure err is always initialized in process_rdma

2020-08-21T23:09:11Z

Clang warns: drivers/block/rnbd/rnbd-srv.c:150:6: warning: variable 'err' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (IS_ERR(bio)) { ^~~~~~~~~~~ drivers/block/rnbd/rnbd-srv.c:177:9: note: uninitialized use occurs here return err; ^~~ drivers/block/rnbd/rnbd-srv.c:150:2: note: remove the 'if' if its condition is always false if (IS_ERR(bio)) { ^~~~~~~~~~~~~~~~~~ drivers/block/rnbd/rnbd-srv.c:126:9: note: initialize the variable 'err' to silence this warning int err; ^ = 0 1 warning generated. err is indeed uninitialized when this statement is taken. Ensure that it is assigned the error value of bio before jumping to the error handling label. Fixes: 735d77d4fd28 ("rnbd: remove rnbd_dev_submit_io") Reported-by: Brooke Basile Signed-off-by: Nathan Chancellor Acked-by: Jack Wang Link: https://github.com/ClangBuiltLinux/linux/issues/1134 Signed-off-by: Jens Axboe

rnbd: no need to set bi_end_io in rnbd_bio_map_kern

2020-08-06T13:30:04Z

Since we always set bi_end_io after call rnbd_bio_map_kern, so the setting in rnbd_bio_map_kern is redundant. Signed-off-by: Guoqing Jiang Acked-by: Danil Kipnis Acked-by: Jack Wang Signed-off-by: Jens Axboe

rnbd: remove rnbd_dev_submit_io

2020-08-06T13:30:04Z

The function only has one caller, so let's open code it in process_rdma. Another bonus is we can avoid push/pop stack, since we need to pass 8 arguments to rnbd_dev_submit_io. Signed-off-by: Guoqing Jiang Acked-by: Danil Kipnis Acked-by: Jack Wang Signed-off-by: Jens Axboe

RDMA/rnbd: Fix compilation error when CONFIG_MODULES is disabled

2020-05-22T18:50:22Z

module_is_live function is only defined when CONFIG_MODULES is enabled. Use try_module_get instead to check whether the module is being removed. When module unload and manuall unmapping is happening in parallel, we can try removing the symlink twice: rnbd_client_exit vs. rnbd_clt_unmap_dev_store. This is probably not the best way to deal with this race in general, but for now this fixes the compilation issue when CONFIG_MODULES is disabled and has no functional impact. Regression tests passed. Fixes: 1eb54f8f5dd8 ("block/rnbd: client: sysfs interface functions") Link: https://lore.kernel.org/r/20200521185909.457245-1-danil.kipnis@cloud.ionos.com Reported-by: Randy Dunlap Suggested-by: Guoqing Jiang Signed-off-by: Danil Kipnis Acked-by: Randy Dunlap Signed-off-by: Jason Gunthorpe

block/rnbd: Fix an IS_ERR() vs NULL check in find_or_create_sess()

2020-05-22T14:51:36Z

The alloc_sess() function returns error pointers, it never returns NULL. Fixes: f7a7a5c228d4 ("block/rnbd: client: main functionality") Link: https://lore.kernel.org/r/20200519120347.GD42765@mwanda Signed-off-by: Dan Carpenter Reviewed-by: Jack Wang Signed-off-by: Jason Gunthorpe