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vduse-blk: Add vduse-blk resize support 

To support block resize, this uses vduse_dev_update_config()
to update the capacity field in configuration space and inject
config interrupt on the block resize callback.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220523084611.91-8-xieyongji@bytedance.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Xie Yongji 2022-05-23 16:46:10 +08:00 committed by Kevin Wolf
parent 2a2359b844
commit 9e4dea6727
1 changed files with 20 additions and 0 deletions
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20
block/export/vduse-blk.c
View File

@ -204,6 +204,23 @@ static void blk_aio_detach(void *opaque)
vblk_exp->export.ctx = NULL;
}
static void vduse_blk_resize(void *opaque)
{
BlockExport *exp = opaque;
VduseBlkExport *vblk_exp = container_of(exp, VduseBlkExport, export);
struct virtio_blk_config config;
config.capacity =
cpu_to_le64(blk_getlength(exp->blk) >> VIRTIO_BLK_SECTOR_BITS);
vduse_dev_update_config(vblk_exp->dev, sizeof(config.capacity),
offsetof(struct virtio_blk_config, capacity),
(char *)&config.capacity);
}
static const BlockDevOps vduse_block_ops = {
.resize_cb = vduse_blk_resize,
};
static int vduse_blk_exp_create(BlockExport *exp, BlockExportOptions *opts,
Error **errp)
{
@ -299,6 +316,8 @@ static int vduse_blk_exp_create(BlockExport *exp, BlockExportOptions *opts,
blk_add_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
vblk_exp);
blk_set_dev_ops(exp->blk, &vduse_block_ops, exp);
return 0;
}
@ -308,6 +327,7 @@ static void vduse_blk_exp_delete(BlockExport *exp)
blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
vblk_exp);
blk_set_dev_ops(exp->blk, NULL, NULL);
vduse_dev_destroy(vblk_exp->dev);
}