block: add an API to atomically update queue limits

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Add a new queue_limits_{start,commit}_update pair of functions that
allows taking an atomic snapshot of queue limits, update it, and
commit it if it passes validity checking.  Also use the low-level
validation helper to implement blk_set_default_limits instead of
duplicating the initialization.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20240213073425.1621680-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2024-02-13 08:34:14 +01:00 • committed by Jens Axboe

parent c490f226a0

commit d690cb8ae1

4 changed files with 217 additions and 37 deletions

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1

block/blk-core.c

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228

block/blk-settings.c

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2

block/blk.h

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23

include/linux/blkdev.h

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