kernel/linux.git/drivers/block/drbd/drbd_actlog.c, branch linux-7.0.y

drbd: fix "LOGIC BUG" in drbd_al_begin_io_nonblock()

2026-02-19T15:21:53+00:00

Even though we check that we "should" be able to do lc_get_cumulative() while holding the device->al_lock spinlock, it may still fail, if some other code path decided to do lc_try_lock() with bad timing. If that happened, we logged "LOGIC BUG for enr=...", but still did not return an error. The rest of the code now assumed that this request has references for the relevant activity log extents. The implcations are that during an active resync, mutual exclusivity of resync versus application IO is not guaranteed. And a potential crash at this point may not realizs that these extents could have been target of in-flight IO and would need to be resynced just in case. Also, once the request completes, it will give up activity log references it does not even hold, which will trigger a BUG_ON(refcnt == 0) in lc_put(). Fix: Do not crash the kernel for a condition that is harmless during normal operation: also catch "e->refcnt == 0", not only "e == NULL" when being noisy about "al_complete_io() called on inactive extent %u\n". And do not try to be smart and "guess" whether something will work, then be surprised when it does not. Deal with the fact that it may or may not work. If it does not, remember a possible "partially in activity log" state (only possible for requests that cross extent boundaries), and return an error code from drbd_al_begin_io_nonblock(). A latter call for the same request will then resume from where we left off. Cc: stable@vger.kernel.org Signed-off-by: Lars Ellenberg Signed-off-by: Christoph Böhmwalder Signed-off-by: Jens Axboe

drbd: actlog: fix kernel-doc warnings and spelling

2023-12-22T14:18:35+00:00

Fix all kernel-doc warnings in drbd_actlog.c: drbd_actlog.c:963: warning: No description found for return value of 'drbd_rs_begin_io' drbd_actlog.c:1015: warning: Function parameter or member 'peer_device' not described in 'drbd_try_rs_begin_io' drbd_actlog.c:1015: warning: Excess function parameter 'device' description in 'drbd_try_rs_begin_io' drbd_actlog.c:1015: warning: No description found for return value of 'drbd_try_rs_begin_io' drbd_actlog.c:1197: warning: No description found for return value of 'drbd_rs_del_all' Fix one spelling error (s/ore/or/). Signed-off-by: Randy Dunlap Cc: Philipp Reisner Cc: Lars Ellenberg Cc: Christoph Böhmwalder Cc: Cc: Jens Axboe Cc: Link: https://lore.kernel.org/r/20231222061909.8791-1-rdunlap@infradead.org Signed-off-by: Jens Axboe

drbd: Pass a peer device to the resync and online verify functions

2023-04-02T02:27:55+00:00

Originally-from: Andreas Grünbacher Signed-off-by: Christoph Böhmwalder Link: https://lore.kernel.org/r/20230330102744.2128122-2-christoph.boehmwalder@linbit.com Signed-off-by: Jens Axboe

drbd: add context parameter to expect() macro

2022-12-01T18:33:49+00:00

Originally-from: Andreas Gruenbacher Signed-off-by: Christoph Böhmwalder Link: https://lore.kernel.org/r/20221201110349.1282687-6-christoph.boehmwalder@linbit.com Signed-off-by: Jens Axboe

drbd: introduce drbd_ratelimit()

2022-12-01T18:33:49+00:00

Use call site specific ratelimit instead of one single static global. Also ratelimit ASSERTION messages generated by expect(). Originally-from: Lars Ellenberg Signed-off-by: Christoph Böhmwalder Link: https://lore.kernel.org/r/20221201110349.1282687-5-christoph.boehmwalder@linbit.com Signed-off-by: Jens Axboe

drbd: use consistent license

2022-11-23T02:38:39+00:00

DRBD currently has a mix of GPL-2.0 and GPL-2.0-or-later SPDX license identifiers. We have decided to stick with GPL 2.0 only, so consistently use that identifier. Signed-off-by: Christoph Böhmwalder Link: https://lore.kernel.org/r/20221122134301.69258-5-christoph.boehmwalder@linbit.com Signed-off-by: Jens Axboe

block/drbd: Use the enum req_op and blk_opf_t types

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

Improve static type checking by using the enum req_op type for variables that represent a request operation and the new blk_opf_t type for variables that represent request flags. Reviewed-by: Christoph Böhmwalder Cc: Lars Ellenberg Cc: Philipp Reisner Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20220714180729.1065367-14-bvanassche@acm.org Signed-off-by: Jens Axboe

block: pass a block_device and opf to bio_alloc_bioset

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

Pass the block_device and operation that we plan to use this bio for to bio_alloc_bioset to optimize the assigment. NULL/0 can be passed, both for the passthrough case on a raw request_queue and to temporarily avoid refactoring some nasty code. Also move the gfp_mask argument after the nr_vecs argument for a much more logical calling convention matching what most of the kernel does. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Link: https://lore.kernel.org/r/20220124091107.642561-16-hch@lst.de Signed-off-by: Jens Axboe

drbd: remove bio_alloc_drbd

2021-01-27T16:51:48+00:00

Given that drbd_md_io_bio_set is initialized during module initialization and the module fails to load if the initialization fails there is no need to fall back to plain bio_alloc. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Reviewed-by: Chaitanya Kulkarni Acked-by: Damien Le Moal Signed-off-by: Jens Axboe

drbd: remove ->this_bdev

2020-10-05T16:38:33+00:00

DRBD keeps a block device open just to get and set the capacity from it. Switch to primarily using the disk capacity as intended by the block layer, and sync it to the bdev using revalidate_disk_size. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe