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block/blkio: fall back on using path when fd setting fails

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qemu_open() fails if called with an unix domain socket in this way:
    -blockdev node-name=drive0,driver=virtio-blk-vhost-user,path=vhost-user-blk.sock,cache.direct=on: Could not open 'vhost-user-blk.sock': No such device or address

Since virtio-blk-vhost-user does not support fd passing, let`s always fall back
on using `path` if we fail the fd passing.

Fixes: cad2ccc395 ("block/blkio: use qemu_open() to support fd passing for virtio-blk")
Reported-by: Qing Wang <qinwang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20230727161020.84213-4-sgarzare@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefano Garzarella 2023-07-27 18:10:19 +02:00 committed by Stefan Hajnoczi
parent 809c319f8a
commit 723bea27b1
1 changed files with 10 additions and 10 deletions
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20
block/blkio.c
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@ -711,19 +711,19 @@ static int blkio_virtio_blk_connect(BlockDriverState *bs, QDict *options,
* In order to open the device read-only, we are using the `read-only`
* property of the libblkio driver in blkio_file_open().
*/
fd = qemu_open(path, O_RDWR, errp);
fd = qemu_open(path, O_RDWR, NULL);
if (fd < 0) {
return -EINVAL;
fd_supported = false;
} else {
ret = blkio_set_int(s->blkio, "fd", fd);
if (ret < 0) {
fd_supported = false;
qemu_close(fd);
}
}
}
ret = blkio_set_int(s->blkio, "fd", fd);
if (ret < 0) {
error_setg_errno(errp, -ret, "failed to set fd: %s",
blkio_get_error_msg());
qemu_close(fd);
return ret;
}
} else {
if (!fd_supported) {
ret = blkio_set_str(s->blkio, "path", path);
if (ret < 0) {
error_setg_errno(errp, -ret, "failed to set path: %s",