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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-02-17 08:48:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-02-17 08:48:45 -0800 |
| commit | 99dfe2d4da67d863ff8f185d1e8033cce28e4c49 (patch) | |
| tree | a5afa6d4923bf972103f10c176d2c65d0f1ba9a1 /drivers/block | |
| parent | 7b751b01ade7f666de2f5c365bd9562c2dcd7d60 (diff) | |
| parent | dfe48ea179733be948c432f6af2fc3913cf5dd28 (diff) | |
Merge tag 'block-7.0-20260216' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
Pull more block updates from Jens Axboe:
- Fix partial IOVA mapping cleanup in error handling
- Minor prep series ignoring discard return value, as
the inline value is always known
- Ensure BLK_FEAT_STABLE_WRITES is set for drbd
- Fix leak of folio in bio_iov_iter_bounce_read()
- Allow IOC_PR_READ_* for read-only open
- Another debugfs deadlock fix
- A few doc updates
* tag 'block-7.0-20260216' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
blk-mq: use NOIO context to prevent deadlock during debugfs creation
blk-stat: convert struct blk_stat_callback to kernel-doc
block: fix enum descriptions kernel-doc
block: update docs for bio and bvec_iter
block: change return type to void
nvmet: ignore discard return value
md: ignore discard return value
block: fix partial IOVA mapping cleanup in blk_rq_dma_map_iova
block: fix folio leak in bio_iov_iter_bounce_read()
block: allow IOC_PR_READ_* ioctls with BLK_OPEN_READ
drbd: always set BLK_FEAT_STABLE_WRITES
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 3 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 20 |
2 files changed, 19 insertions, 4 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index c73376886e7a..1f6ac9202b66 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -2659,9 +2659,6 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig * connect. */ .max_hw_sectors = DRBD_MAX_BIO_SIZE_SAFE >> 8, - .features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA | - BLK_FEAT_ROTATIONAL | - BLK_FEAT_STABLE_WRITES, }; device = minor_to_device(minor); diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 91f3b8afb63c..b502038be0a9 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -1296,6 +1296,8 @@ void drbd_reconsider_queue_parameters(struct drbd_device *device, lim.max_segments = drbd_backing_dev_max_segments(device); } else { lim.max_segments = BLK_MAX_SEGMENTS; + lim.features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA | + BLK_FEAT_ROTATIONAL | BLK_FEAT_STABLE_WRITES; } lim.max_hw_sectors = new >> SECTOR_SHIFT; @@ -1318,8 +1320,24 @@ void drbd_reconsider_queue_parameters(struct drbd_device *device, lim.max_hw_discard_sectors = 0; } - if (bdev) + if (bdev) { blk_stack_limits(&lim, &b->limits, 0); + /* + * blk_set_stacking_limits() cleared the features, and + * blk_stack_limits() may or may not have inherited + * BLK_FEAT_STABLE_WRITES from the backing device. + * + * DRBD always requires stable writes because: + * 1. The same bio data is read for both local disk I/O and + * network transmission. If the page changes mid-flight, + * the local and remote copies could diverge. + * 2. When data integrity is enabled, DRBD calculates a + * checksum before sending the data. If the page changes + * between checksum calculation and transmission, the + * receiver will detect a checksum mismatch. + */ + lim.features |= BLK_FEAT_STABLE_WRITES; + } /* * If we can handle "zeroes" efficiently on the protocol, we want to do |