Break down the sglist if VIRTIO_BLK_F_SIZE_MAX is on
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Authored by khng on Nov 17 2020, 5:14 PM.

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Summary

This change introduce a mechanism to break down the sglist used in
virtio_blk. If VIRTIO_BLK_F_SIZE_MAX is advertised by the host, the
maximum size of each segments in the scatter/gather should be
limited to the size advertised by the host.

Reported by: Yuan Rui <number201724@me.com>
MFC after: 2 weeks

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Buildable 34859
Build 31883: arc lint + arc unit

Event Timeline

khng requested review of this revision.Nov 17 2020, 5:14 PM

khng created this revision.

Harbormaster completed remote builds in B34859: Diff 79668.Nov 17 2020, 5:14 PM

khng planned changes to this revision.Nov 17 2020, 5:16 PM

khng abandoned this revision.Nov 18 2020, 3:14 AM

Revision Contents
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sys/

dev/

virtio/

block/

virtio_blk.c

123 lines

Diff 79668

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sys/dev/virtio/block/virtio_blk.c

Break down the sglist if VIRTIO_BLK_F_SIZE_MAX is onAbandonedPublicActions