kernel/linux.git/drivers/md/dm-raid1.c, branch v6.1.174

dm-mirror: fix a tiny race condition

2025-06-27T10:07:30+00:00

commit 829451beaed6165eb11d7a9fb4e28eb17f489980 upstream. There's a tiny race condition in dm-mirror. The functions queue_bio and write_callback grab a spinlock, add a bio to the list, drop the spinlock and wake up the mirrord thread that processes bios in the list. It may be possible that the mirrord thread processes the bio just after spin_unlock_irqrestore is called, before wakeup_mirrord. This spurious wake-up is normally harmless, however if the device mapper device is unloaded just after the bio was processed, it may be possible that wakeup_mirrord(ms) uses invalid "ms" pointer. Fix this bug by moving wakeup_mirrord inside the spinlock. Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

dm io: Support IO priority

2024-03-26T22:21:02+00:00

[ Upstream commit 6e5f0f6383b4896c7e9b943d84b136149d0f45e9 ] Some IO will dispatch from kworker with different io_context settings than the submitting task, we may need to specify a priority to avoid losing priority. Add IO priority parameter to dm_io() and update all callers. Co-developed-by: Yibin Ding Signed-off-by: Yibin Ding Signed-off-by: Hongyu Jin Reviewed-by: Eric Biggers Reviewed-by: Mikulas Patocka Signed-off-by: Mike Snitzer Stable-dep-of: b4d78cfeb304 ("dm-integrity: align the outgoing bio in integrity_recheck") Signed-off-by: Sasha Levin

dm: address indent/space issues

2024-03-26T22:21:02+00:00

[ Upstream commit 255e2646496fcbf836a3dfe1b535692f09f11b45 ] Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer Stable-dep-of: b4d78cfeb304 ("dm-integrity: align the outgoing bio in integrity_recheck") Signed-off-by: Sasha Levin

dm: avoid split of quoted strings where possible

2023-07-19T14:22:07+00:00

[ Upstream commit 2e84fecf19e1694338deec8bf6c90ff84f8f31fb ] Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer Stable-dep-of: 249bed821b4d ("dm ioctl: Avoid double-fetch of version") Signed-off-by: Sasha Levin

dm: change "unsigned" to "unsigned int"

2023-04-13T14:55:17+00:00

[ Upstream commit 86a3238c7b9b759cb864f4f768ab2e24687dc0e6 ] Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer Stable-dep-of: f7b58a69fad9 ("dm: fix improper splitting for abnormal bios") Signed-off-by: Sasha Levin

dm/core: Reduce the size of struct dm_io_request

2022-07-14T18:14:31+00:00

Combine the bi_op and bi_op_flags into the bi_opf member. Use the new blk_opf_t type to improve static type checking. This patch does not change any functionality. Cc: Alasdair Kergon Cc: Mike Snitzer Cc: Mikulas Patocka Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20220714180729.1065367-22-bvanassche@acm.org Signed-off-by: Jens Axboe

dm: update target status functions to support IMA measurement

2021-08-10T17:34:23+00:00

For device mapper targets to take advantage of IMA's measurement capabilities, the status functions for the individual targets need to be updated to handle the status_type_t case for value STATUSTYPE_IMA. Update status functions for the following target types, to log their respective attributes to be measured using IMA. 01. cache 02. crypt 03. integrity 04. linear 05. mirror 06. multipath 07. raid 08. snapshot 09. striped 10. verity For rest of the targets, handle the STATUSTYPE_IMA case by setting the measurement buffer to NULL. For IMA to measure the data on a given system, the IMA policy on the system needs to be updated to have the following line, and the system needs to be restarted for the measurements to take effect. /etc/ima/ima-policy measure func=CRITICAL_DATA label=device-mapper template=ima-buf The measurements will be reflected in the IMA logs, which are located at: /sys/kernel/security/integrity/ima/ascii_runtime_measurements /sys/kernel/security/integrity/ima/binary_runtime_measurements These IMA logs can later be consumed by various attestation clients running on the system, and send them to external services for attesting the system. The DM target data measured by IMA subsystem can alternatively be queried from userspace by setting DM_IMA_MEASUREMENT_FLAG with DM_TABLE_STATUS_CMD. Signed-off-by: Tushar Sugandhi Signed-off-by: Mike Snitzer

dm kcopyd: avoid useless atomic operations

2021-06-04T16:07:24+00:00

The functions set_bit and clear_bit are atomic. We don't need atomicity when making flags for dm-kcopyd. So, change them to direct manipulation of the flags. Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer

block: store a block_device pointer in struct bio

2021-01-25T01:17:20+00:00

Replace the gendisk pointer in struct bio with a pointer to the newly improved struct block device. From that the gendisk can be trivially accessed with an extra indirection, but it also allows to directly look up all information related to partition remapping. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe

block: rename generic_make_request to submit_bio_noacct

2020-07-01T13:27:24+00:00

generic_make_request has always been very confusingly misnamed, so rename it to submit_bio_noacct to make it clear that it is submit_bio minus accounting and a few checks. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe