diff options
| -rw-r--r-- | block/blkio.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/block/blkio.c b/block/blkio.c index baba2f0..1dd4956 100644 --- a/block/blkio.c +++ b/block/blkio.c @@ -713,6 +713,12 @@ static int blkio_virtio_blk_connect(BlockDriverState *bs, QDict *options, */ fd = qemu_open(path, O_RDWR, NULL); if (fd < 0) { + /* + * qemu_open() can fail if the user specifies a path that is not + * a file or device, for example in the case of Unix Domain Socket + * for the virtio-blk-vhost-user driver. In such cases let's have + * libblkio open the path directly. + */ fd_supported = false; } else { ret = blkio_set_int(s->blkio, "fd", fd); @@ -741,9 +747,12 @@ static int blkio_virtio_blk_connect(BlockDriverState *bs, QDict *options, } /* - * If the libblkio driver doesn't support the `fd` property, blkio_connect() - * will fail with -EINVAL. So let's try calling blkio_connect() again by - * directly setting `path`. + * Before https://gitlab.com/libblkio/libblkio/-/merge_requests/208 + * (libblkio <= v1.3.0), setting the `fd` property is not enough to check + * whether the driver supports the `fd` property or not. In that case, + * blkio_connect() will fail with -EINVAL. + * So let's try calling blkio_connect() again by directly setting `path` + * to cover this scenario. */ if (fd_supported && ret == -EINVAL) { /* |