Hi,
On 20/07/15 10:28, Fan Du wrote:
> To detach tap device automatically from bridge when exiting,
> just like the reverse of "script" does.
>
> Signed-off-by: Fan Du <[email protected]>
> ---
> tools/kvm/include/kvm/virtio-net.h | 1 +
> tools/kvm/virtio/net.c | 28 ++++++++++++++++++++++++++++
> 2 files changed, 29 insertions(+)
>
> diff --git a/tools/kvm/include/kvm/virtio-net.h
> b/tools/kvm/include/kvm/virtio-net.h
> index f435cc3..d136a09 100644
> --- a/tools/kvm/include/kvm/virtio-net.h
> +++ b/tools/kvm/include/kvm/virtio-net.h
> @@ -9,6 +9,7 @@ struct virtio_net_params {
> const char *guest_ip;
> const char *host_ip;
> const char *script;
> + const char *downscript;
> const char *trans;
> const char *tapif;
> char guest_mac[6];
> diff --git a/tools/kvm/virtio/net.c b/tools/kvm/virtio/net.c
> index 25b9496..f3f7200 100644
> --- a/tools/kvm/virtio/net.c
> +++ b/tools/kvm/virtio/net.c
> @@ -696,6 +696,8 @@ static int set_net_param(struct kvm *kvm, struct
> virtio_net_params *p,
> die("Unknown network mode %s, please use user, tap or
> none", kvm->cfg.network);
> } else if (strcmp(param, "script") == 0) {
> p->script = strdup(val);
> + } else if (strcmp(param, "downscript") == 0) {
> + p->downscript = strdup(val);
> } else if (strcmp(param, "guest_ip") == 0) {
> p->guest_ip = strdup(val);
> } else if (strcmp(param, "host_ip") == 0) {
> @@ -871,6 +873,32 @@ virtio_dev_init(virtio_net__init);
>
> int virtio_net__exit(struct kvm *kvm)
> {
> + int pid;
> + int status;
> + struct virtio_net_params *params;
> + struct net_dev *ndev;
> + struct list_head *ptr;
> +
> + list_for_each(ptr, &ndevs) {
> + ndev = list_entry(ptr, struct net_dev, list);
> + params = ndev->params;
> + /* Cleanup any tap device which attached to bridge */
> + if (ndev->mode == NET_MODE_TAP ||
Do you mean && here? Otherwise it may try to execute "none".
> + strcmp(params->downscript, "none")) {
> + pid = fork();
> + if (pid == 0) {
> + execl(ndev->params->downscript,
> + params->downscript, ndev->tap_name, NULL);
> + _exit(1);
> + } else {
> + waitpid(pid, &status, 0);
> + if (WIFEXITED(status) && WEXITSTATUS(status) !=
> 0) {
> + pr_warning("Fail to cleanup tap by %s",
> + params->script);
> + }
> + }
> + }
> + }
I think this should be moved into a separate function to avoid code
duplication with the init script execution. Also it improves readability
and avoids too long lines.
Cheers,
Andre.
> return 0;
> }
> virtio_dev_exit(virtio_net__exit);
>
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