diff options
Diffstat (limited to 'blockdev-nbd.c')
| -rw-r--r-- | blockdev-nbd.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 8031813071..d1721a3e26 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -82,6 +82,11 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable, NBDExport *exp; NBDCloseNotifier *n; + if (server_fd == -1) { + error_setg(errp, "NBD server not running"); + return; + } + if (nbd_export_find(device)) { error_setg(errp, "NBD server already exporting device '%s'", device); return; @@ -93,6 +98,13 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable, return; } + if (!has_writable) { + writable = true; + } + if (bdrv_is_read_only(bs)) { + writable = false; + } + exp = nbd_export_new(bs, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY, nbd_server_put_ref); @@ -113,7 +125,9 @@ void qmp_nbd_server_stop(Error **errp) nbd_close_notifier(&cn->n, nbd_export_get_blockdev(cn->exp)); } - qemu_set_fd_handler2(server_fd, NULL, NULL, NULL, NULL); - close(server_fd); - server_fd = -1; + if (server_fd != -1) { + qemu_set_fd_handler2(server_fd, NULL, NULL, NULL, NULL); + close(server_fd); + server_fd = -1; + } } |