tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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ublk: report BLK_SPLIT_INTERVAL_CAPABLE

The ublk driver doesn't access request integrity buffers directly, it
only copies them to/from the ublk server in ublk_copy_user_integrity().
ublk_copy_user_integrity() uses bio_for_each_integrity_vec() to walk all
the integrity segments. ublk devices are therefore capable of handling
requests with integrity intervals split across segments. Set
BLK_SPLIT_INTERVAL_CAPABLE in the struct blk_integrity flags for ublk
devices to opt out of the integrity-interval dma_alignment limit.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://patch.msgid.link/20260313144701.1221652-3-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

authored by

Caleb Sander Mateos and committed by
Jens Axboe 5d540162 203247c5

+1 -1
+1 -1
drivers/block/ublk_drv.c
··· 808 808 809 809 static int ublk_integrity_flags(u32 flags) 810 810 { 811 - int ret_flags = 0; 811 + int ret_flags = BLK_SPLIT_INTERVAL_CAPABLE; 812 812 813 813 if (flags & LBMD_PI_CAP_INTEGRITY) { 814 814 flags &= ~LBMD_PI_CAP_INTEGRITY;