dm-crypt: provide dma_alignment limit in io_hints

keithbusch · axboe · commit 86e4d3e8d183 · 2022-11-16T15:58:11.000-07:00
This device mapper needs bio vectors to be sized and memory aligned to the logical block size. Set the minimum required queue limit accordingly. Link: https://lore.kernel.org/linux-block/20221101001558.648ee024@xps.demsh.org/ Fixes: b1a000d ("block: relax direct io memory alignment") Reportred-by: Eric Biggers <ebiggers@kernel.org> Reported-by: Dmitrii Tcvetkov <me@demsh.org> Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Mike Snitzer <snitzer@kernel.org> Link: https://lore.kernel.org/r/20221110184501.2451620-3-kbusch@meta.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
@@ -3630,6 +3630,7 @@ static void crypt_io_hints(struct dm_target *ti, struct queue_limits *limits)
 	limits->physical_block_size =
 		max_t(unsigned, limits->physical_block_size, cc->sector_size);
 	limits->io_min = max_t(unsigned, limits->io_min, cc->sector_size);
+	limits->dma_alignment = limits->logical_block_size - 1;
 }
 
 static struct target_type crypt_target = {

Original file line number	Diff line number	Diff line change
`@@ -3630,6 +3630,7 @@ static void crypt_io_hints(struct dm_target ti, struct queue_limits limits)`
`3630`	`3630`	`limits->physical_block_size =`
`3631`	`3631`	`max_t(unsigned, limits->physical_block_size, cc->sector_size);`
`3632`	`3632`	`limits->io_min = max_t(unsigned, limits->io_min, cc->sector_size);`
	`3633`	`+ limits->dma_alignment = limits->logical_block_size - 1;`
`3633`	`3634`	`}`
`3634`	`3635`
`3635`	`3636`	`static struct target_type crypt_target = {`