kernel/linux.git/drivers/md/dm-snap.c, branch v6.1.186

dm: add missing empty lines

2026-08-23T12:18:26+00:00

[ Upstream commit 0ef0b4717aa6849d251b23ae1efe93ca93af540b ] Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer Stable-dep-of: edf025f08385 ("dm-integrity: don't increment hash_offset twice") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

dm: fix trailing statements

2026-08-23T12:18:25+00:00

[ Upstream commit 03b18887703c5fa342896e52e873812ea33d964b ] Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer Stable-dep-of: edf025f08385 ("dm-integrity: don't increment hash_offset twice") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

dm snapshot: fix lockup in dm_exception_table_exit

2024-04-03T13:19:39+00:00

[ Upstream commit 6e7132ed3c07bd8a6ce3db4bb307ef2852b322dc ] There was reported lockup when we exit a snapshot with many exceptions. Fix this by adding "cond_resched" to the loop that frees the exceptions. Reported-by: John Pittman Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer 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: fix undue/missing spaces

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

[ Upstream commit 43be9c743c2553519c2093d1798b542f28095a51 ] 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 snapshot: fix typo in snapshot_map() comment

2022-07-07T15:49:39+00:00

Signed-off-by: Zhang Jiaming Signed-off-by: Mike Snitzer

dm-snap: use blkdev_issue_flush instead of open coding it

2022-02-02T14:49:59+00:00

Use blkdev_issue_flush, which uses an on-stack bio instead of an opencoded version with a bio embedded into struct dm_snapshot. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220124091107.642561-8-hch@lst.de 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 snapshot: properly fix a crash when an origin has no snapshots

2021-05-25T20:19:58+00:00

If an origin target has no snapshots, o->split_boundary is set to 0. This causes BUG_ON(sectors <= 0) in block/bio.c:bio_split(). Fix this by initializing chunk_size, and in turn split_boundary, to rounddown_pow_of_two(UINT_MAX) -- the largest power of two that fits into "unsigned" type. Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org Signed-off-by: Mike Snitzer