kernel/tools/testing/selftests/ublk/Makefile, branch linux-rolling-stable

selftests/ublk: fix Makefile to rebuild on header changes

2025-12-28T16:25:26Z

Add header dependencies to kublk build rule so that changes to kublk.h, ublk_dep.h, or utils.h trigger a rebuild. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

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: add user copy test cases

2025-12-12T19:50:41Z

The ublk selftests cover every data copy mode except user copy. Add tests for user copy based on the existing test suite: - generic_14 ("basic recover function verification (user copy)") based on generic_04 and generic_05 - null_03 ("basic IO test with user copy") based on null_01 and null_02 - loop_06 ("write and verify over user copy") based on loop_01 and loop_03 - loop_07 ("mkfs & mount & umount with user copy") based on loop_02 and loop_04 - stripe_05 ("write and verify test on user copy") based on stripe_03 - stripe_06 ("mkfs & mount & umount on user copy") based on stripe_02 and stripe_04 - stress_06 ("run IO and remove device (user copy)") based on stress_01 and stress_03 - stress_07 ("run IO and kill ublk server (user copy)") based on stress_02 and stress_04 Signed-off-by: Caleb Sander Mateos Reviewed-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add test to verify that feat_map is complete

2025-09-19T17:06:15Z

Add a test that verifies that the currently running kernel does not report support for any features that are unrecognized by kublk. This should catch cases where features are added without updating kublk's feat_map accordingly, which has happened multiple times in the past (see [1], [2]). Note that this new test may fail if the test suite is older than the kernel, and the newer kernel contains a newly introduced feature. I believe this is not a use case we currently care about - we only care about newer test suites passing on older kernels. [1] https://lore.kernel.org/linux-block/20250606214011.2576398-1-csander@purestorage.com/t/#u [2] https://lore.kernel.org/linux-block/2a370ab1-d85b-409d-b762-f9f3f6bdf705@nvidia.com/t/#m1c520a058448d594fd877f07804e69b28908533f Signed-off-by: Uday Shankar Reviewed-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: cover PER_IO_DAEMON in more stress tests

2025-06-02T18:00:31Z

We have stress_03, stress_04 and stress_05 for checking new feature vs. stress IO & device removal & ublk server crash & recovery, so let the three existing stress tests cover PER_IO_DAEMON. Then stress_06 can be removed, since the same test function is included in stress_03. Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250602132113.1398645-1-ming.lei@redhat.com Reviewed-by: Uday Shankar [axboe: remove test_stress_06.sh from Makefile too] 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 functional test for per io daemons

2025-05-31T20:38:48Z

Add a new test test_generic_12 which: - sets up a ublk server with per_io_tasks and a different number of ublk server threads and ublk_queues. This is possible now that these objects are decoupled - runs some I/O load from a single CPU - verifies that all the ublk server threads handle some I/O Before this changeset, this test fails, since I/O issued from one CPU is always handled by the one ublk server thread. After this changeset, the test passes. In the future, the last check above may be strengthened to "verify that all ublk server threads handle the same amount of I/O." However, this requires some adjustments/bugfixes to tag allocation, so this work is postponed to a followup. Signed-off-by: Uday Shankar Reviewed-by: Ming Lei Link: https://lore.kernel.org/r/20250529-ublk_task_per_io-v8-7-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: add test for covering UBLK_AUTO_BUF_REG_FALLBACK

2025-05-20T16:24:45Z

Add test for covering UBLK_AUTO_BUF_REG_FALLBACK: - pass '--auto_zc_fallback' to null target, which requires both F_AUTO_BUF_REG and F_SUPPORT_ZERO_COPY for handling UBLK_AUTO_BUF_REG_FALLBACK - add ->buf_index() method for returning invalid buffer index to trigger UBLK_AUTO_BUF_REG_FALLBACK - add generic_09 for running the test - add --auto_zc_fallback test in stress_03/stress_04/stress_05 Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250520045455.515691-7-ming.lei@redhat.com Signed-off-by: Jens Axboe