Re: [PATCH 2/2] kvm tools: Make host side IP configurable

[Asias He <asias.hejun@gmail.com>]

On 04/13/2011 08:13 PM, Sasha Levin wrote:
> Add --host-ip-addr parameter to allow changing the host-side IP address.


I'd personally prefer something like this:

--network=model=virtio,hostip=x.x.x.x/mask,guestmac=yy:yy:yy:yy

Once we can set up ip address for guest, we can use:

--network=model=virtio,hostip=x.x.x.x/mask,guestmac=yy:yy:yy:yy,guestip=z.z.z.z/mask,guestgw=v.v.v.v

> 
> Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
> ---
>  tools/kvm/include/kvm/virtio-net.h |    2 +-
>  tools/kvm/kvm-run.c                |    9 ++++++++-
>  tools/kvm/virtio-net.c             |    9 ++++-----
>  3 files changed, 13 insertions(+), 7 deletions(-)
> 
> diff --git a/tools/kvm/include/kvm/virtio-net.h b/tools/kvm/include/kvm/virtio-net.h
> index a1cab15..03eb623 100644
> --- a/tools/kvm/include/kvm/virtio-net.h
> +++ b/tools/kvm/include/kvm/virtio-net.h
> @@ -2,6 +2,6 @@
>  #define KVM__VIRTIO_NET_H
>  
>  struct kvm;
> -void virtio_net__init(struct kvm *self);
> +void virtio_net__init(struct kvm *self, const char* host_ip_addr);
>  
>  #endif /* KVM__VIRTIO_NET_H */
> diff --git a/tools/kvm/kvm-run.c b/tools/kvm/kvm-run.c
> index 6046a0a..910a8d8 100644
> --- a/tools/kvm/kvm-run.c
> +++ b/tools/kvm/kvm-run.c
> @@ -31,6 +31,7 @@
>  #define DEFAULT_KVM_DEV		"/dev/kvm"
>  #define DEFAULT_CONSOLE		"serial"
>  #define DEFAULT_NETWORK		"none"
> +#define DEFAULT_HOST_ADDR	"192.168.33.2"
>  
>  #define MB_SHIFT		(20)
>  #define MIN_RAM_SIZE_MB		(64ULL)
> @@ -66,6 +67,7 @@ static const char *image_filename;
>  static const char *console;
>  static const char *kvm_dev;
>  static const char *network;
> +static const char *host_ip_addr;
>  static bool single_step;
>  static bool readonly_image;
>  extern bool ioport_debug;
> @@ -89,6 +91,8 @@ static const struct option options[] = {
>  			"Console to use"),
>  	OPT_STRING('n', "network", &network, "virtio",
>  			"Network to use"),
> +	OPT_STRING('\0', "host-ip-addr", &host_ip_addr, "a.b.c.d",
> +			"Assign this address to the host side networking"),
>  
>  	OPT_GROUP("Kernel options:"),
>  	OPT_STRING('k', "kernel", &kernel_filename, "kernel",
> @@ -218,6 +222,9 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
>  	else
>  		active_console  = CONSOLE_8250;
>  
> +	if (!host_ip_addr)
> +		host_ip_addr = DEFAULT_HOST_ADDR;
> +
>  	term_init();
>  
>  	kvm = kvm__init(kvm_dev, ram_size);
> @@ -259,7 +266,7 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
>  		network = DEFAULT_NETWORK;
>  
>  	if (!strncmp(network, "virtio", 6))
> -		virtio_net__init(kvm);
> +		virtio_net__init(kvm, host_ip_addr);
>  
>  	kvm__start_timer(kvm);
>  
> diff --git a/tools/kvm/virtio-net.c b/tools/kvm/virtio-net.c
> index 5f9bf07..ec65779 100644
> --- a/tools/kvm/virtio-net.c
> +++ b/tools/kvm/virtio-net.c
> @@ -276,7 +276,7 @@ static struct pci_device_header virtio_net_pci_device = {
>  	.irq_line		= VIRTIO_NET_IRQ,
>  };
>  
> -static void virtio_net__tap_init(void)
> +static void virtio_net__tap_init(const char *host_ip_addr)
>  {
>  	struct ifreq ifr;
>  	int sock = socket(AF_INET, SOCK_STREAM, 0);
> @@ -298,8 +298,7 @@ static void virtio_net__tap_init(void)
>  
>  	strncpy(ifr.ifr_name, net_device.tap_name, sizeof(net_device.tap_name));
>  
> -	/*FIXME: Remove this after user can specify ip address and netmask*/
> -	((struct sockaddr_in *)(&(ifr.ifr_addr)))->sin_addr.s_addr = inet_addr("192.168.33.2");
> +	((struct sockaddr_in *)(&(ifr.ifr_addr)))->sin_addr.s_addr = inet_addr(host_ip_addr);
>  	ifr.ifr_addr.sa_family = AF_INET;
>  
>  	if (ioctl(sock, SIOCSIFADDR, &ifr) < 0)
> @@ -327,11 +326,11 @@ static void virtio_net__io_thread_init(struct kvm *self)
>  	pthread_create(&net_device.io_tx_thread, NULL, virtio_net_tx_thread, (void *)self);
>  }
>  
> -void virtio_net__init(struct kvm *self)
> +void virtio_net__init(struct kvm *self, const char* host_ip_addr)
>  {
>  	pci__register(&virtio_net_pci_device, PCI_VIRTIO_NET_DEVNUM);
>  	ioport__register(IOPORT_VIRTIO_NET, &virtio_net_io_ops, IOPORT_VIRTIO_NET_SIZE);
>  
> -	virtio_net__tap_init();
> +	virtio_net__tap_init(host_ip_addr);
>  	virtio_net__io_thread_init(self);
>  }


-- 
Best Regards,
Asias He