kernel/tools/testing/selftests/ublk/test_common.sh, branch linux-rolling-stable

selftests/ublk: add test for async partition scan

2025-12-28T16:25:26Z

Add test_generic_15.sh to verify that async partition scan prevents IO hang when reading partition tables. The test creates ublk devices with fault_inject target and very large delay (60s) to simulate blocked partition table reads, then kills the daemon to verify proper state transitions without hanging: 1. Without recovery support: - Create device with fault_inject and 60s delay - Kill daemon while partition scan may be blocked - Verify device transitions to DEAD state 2. With recovery support (-r 1): - Create device with fault_inject, 60s delay, and recovery - Kill daemon while partition scan may be blocked - Verify device transitions to QUIESCED state Before the async partition scan fix, killing the daemon during partition scan would cause deadlock as partition scan held ub->mutex while waiting for IO. With the async fix, partition scan happens in a work function and flush_work() ensures proper synchronization. Add _add_ublk_dev_no_settle() helper function to skip udevadm settle, which would otherwise hang waiting for partition scan events to complete when partition table read is delayed. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: fix fio arguments in run_io_and_recover()

2025-12-12T19:50:40Z

run_io_and_recover() invokes fio with --size="${size}", but the variable size doesn't exist. Thus, the argument expands to --size=, which causes fio to exit immediately with an error without issuing any I/O. Pass the value for size as the first argument to the function. Signed-off-by: Caleb Sander Mateos Reviewed-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add stress test for per io daemons

2025-05-31T20:38:53Z

Add a new test_stress_06 for the per io daemons feature. This is just a copy of test_stress_01 with the per_io_tasks flag added, with varying amounts of nthreads. This test is able to reproduce a panic which was caught manually during development [1]; in the current version of this patch set, it passes. Note that this commit also makes all stress tests using the run_io_and_remove helper more stressful by additionally exercising the batch submit (queue_rqs) path. [1] https://lore.kernel.org/linux-block/aDgwGoGCEpwd1mFY@fedora/ Suggested-by: Ming Lei Signed-off-by: Uday Shankar Link: https://lore.kernel.org/r/20250529-ublk_task_per_io-v8-8-e9d3b119336a@purestorage.com Signed-off-by: Jens Axboe

selftests: ublk: add test for UBLK_F_QUIESCE

2025-05-23T15:42:12Z

Add test generic_11 for covering new control command of UBLK_U_CMD_QUIESCE_DEV. Add 'quiesce -n dev_id' sub-command on ublk utility for transitioning device state to quiesce states, then verify the feature via generic_10 by doing quiesce and recovery. Cc: Yoav Cohen Link: https://lore.kernel.org/linux-block/DM4PR12MB632807AB7CDCE77D1E5AB7D0A9B92@DM4PR12MB6328.namprd12.prod.outlook.com/ Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250522163523.406289-4-ming.lei@redhat.com Signed-off-by: Jens Axboe

selftests: ublk: add test case for UBLK_U_CMD_UPDATE_SIZE

2025-05-23T15:42:12Z

Add test generic_10 for covering new control command of UBLK_U_CMD_UPDATE_SIZE. Add 'update_size -s|--size size_in_bytes' sub-command on ublk utility for supporting this feature, then verify the feature via generic_10. Cc: Omri Mann Cc: Jared Holzman Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250522163523.406289-2-ming.lei@redhat.com Signed-off-by: Jens Axboe

selftests: ublk: make IO & device removal test more stressful

2025-05-20T16:24:13Z

__run_io_and_remove() is used in several stress tests for running heavy IO vs. removing device meantime. However, sequential `readwrite` is taken in the fio script, which isn't correct, we should take random IO for saturating ublk device. Also turns out '--num_jobs=4' isn't stressful enough, so change it to '--num_jobs=$(nproc)'. Finally we don't cover single queue test in `test_stress_02.sh`, so add single queue test which can trigger request tag recycling easier. With above change the issue in #1 can be reproduced reliably in stress_02.sh. Link:https://lore.kernel.org/linux-block/mruqwpf4tqenkbtgezv5oxwq7ngyq24jzeyqy4ixzvivatbbxv@4oh2wzz4e6qn/ #1 Cc: Jared Holzman Cc: Shinichiro Kawasaki Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250519031620.245749-1-ming.lei@redhat.com Signed-off-by: Jens Axboe

selftests: ublk: common: fix _get_disk_dev_t for pre-9.0 coreutils

2025-04-24T12:30:54Z

Some distributions, such as centos stream 9, still have a version of coreutils which does not yet support the %Hr and %Lr formats for stat(1) [1, 2]. Running ublk selftests on these distributions results in the following error in tests that use the _get_disk_dev_t helper: line 23: ?r: syntax error: operand expected (error token is "?r") To better accommodate older distributions, rewrite _get_disk_dev_t to use the much older %t and %T formats for stat instead. [1] https://github.com/coreutils/coreutils/blob/v9.0/NEWS#L114 [2] https://pkgs.org/download/coreutils Signed-off-by: Uday Shankar Reviewed-by: Ming Lei Link: https://lore.kernel.org/r/20250423-ublk_selftests-v1-2-7d060e260e76@purestorage.com Signed-off-by: Jens Axboe

selftests: ublk: move creating UBLK_TMP into _prep_test()

2025-04-17T01:32:18Z

test may exit early because of missing program or not having required feature before calling _prep_test(), then $UBLK_TMP isn't cleaned. Fix it by moving creating $UBLK_TMP into _prep_test(), any resources created since _prep_test() will be cleaned by _cleanup_test(). Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250412023035.2649275-14-ming.lei@redhat.com Signed-off-by: Jens Axboe

selftests: ublk: support user recovery

2025-04-17T01:32:18Z

Add user recovery feature. Meantime add user recovery test: generic_04 and generic_05(zero copy) Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250412023035.2649275-12-ming.lei@redhat.com Signed-off-by: Jens Axboe

selftests: ublk: run stress tests in parallel

2025-04-17T01:32:18Z

Run stress tests in parallel, meantime add shell local function to simplify the two stress tests. Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250412023035.2649275-6-ming.lei@redhat.com Signed-off-by: Jens Axboe