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virtio_blk: Fix default logical block size fallback

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If we fail to read a logical block size in virtblk_read_limits() ->
virtio_cread_feature(), then we default to what is in
lim->logical_block_size, but that would be 0.

We can deal with lim->logical_block_size = 0 later in the
blk_mq_alloc_disk(), but the code in virtblk_read_limits() needs a proper
default, so give a default of SECTOR_SIZE.

Fixes: 27e32cd23f ("block: pass a queue_limits argument to blk_mq_alloc_disk")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240708091651.177447-2-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
John Garry 2024-07-08 09:16:47 +00:00 committed by Jens Axboe
parent 6b43537fae
commit 4ff3d01275
1 changed files with 13 additions and 13 deletions
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26
drivers/block/virtio_blk.c
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@ -1250,7 +1250,7 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
struct queue_limits *lim)
{
struct virtio_device *vdev = vblk->vdev;
u32 v, blk_size, max_size, sg_elems, opt_io_size;
u32 v, max_size, sg_elems, opt_io_size;
u32 max_discard_segs = 0;
u32 discard_granularity = 0;
u16 min_io_size;
@ -1291,44 +1291,43 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
/* Host can optionally specify the block size of the device */
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_BLK_SIZE,
struct virtio_blk_config, blk_size,
&blk_size);
&lim->logical_block_size);
if (!err) {
err = blk_validate_block_size(blk_size);
err = blk_validate_block_size(lim->logical_block_size);
if (err) {
dev_err(&vdev->dev,
"virtio_blk: invalid block size: 0x%x\n",
blk_size);
lim->logical_block_size);
return err;
}
lim->logical_block_size = blk_size;
} else
blk_size = lim->logical_block_size;
}
/* Use topology information if available */
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, physical_block_exp,
&physical_block_exp);
if (!err && physical_block_exp)
lim->physical_block_size = blk_size * (1 << physical_block_exp);
lim->physical_block_size =
lim->logical_block_size * (1 << physical_block_exp);
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, alignment_offset,
&alignment_offset);
if (!err && alignment_offset)
lim->alignment_offset = blk_size * alignment_offset;
lim->alignment_offset =
lim->logical_block_size * alignment_offset;
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, min_io_size,
&min_io_size);
if (!err && min_io_size)
lim->io_min = blk_size * min_io_size;
lim->io_min = lim->logical_block_size * min_io_size;
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, opt_io_size,
&opt_io_size);
if (!err && opt_io_size)
lim->io_opt = blk_size * opt_io_size;
lim->io_opt = lim->logical_block_size * opt_io_size;
if (virtio_has_feature(vdev, VIRTIO_BLK_F_DISCARD)) {
virtio_cread(vdev, struct virtio_blk_config,
@ -1422,7 +1421,7 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
lim->discard_granularity =
discard_granularity << SECTOR_SHIFT;
else
lim->discard_granularity = blk_size;
lim->discard_granularity = lim->logical_block_size;
}
if (virtio_has_feature(vdev, VIRTIO_BLK_F_ZONED)) {
@ -1453,6 +1452,7 @@ static int virtblk_probe(struct virtio_device *vdev)
struct virtio_blk *vblk;
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
.logical_block_size = SECTOR_SIZE,
};
int err, index;
unsigned int queue_depth;