search for: setup_tun_net

...net/lguest_net.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff -r 999a9058a151 Documentation/lguest/lguest.c --- a/Documentation/lguest/lguest.c Tue May 08 19:49:33 2007 +1000 +++ b/Documentation/lguest/lguest.c Tue May 08 21:04:51 2007 +1000 @@ -860,6 +860,10 @@ static void setup_tun_net(const char *ar /* We are peer 0, ie. first slot. */ configure_device(ipfd, ifr.ifr_name, ip, dev->mem); + + /* Set "promisc" bit: we want every single packet. */ + *((u8 *)dev->mem) |= 0x1; + close(ipfd); verbose("device %p: tun net %u.%u.%u.%u\n", diff -r 999a...

...net/lguest_net.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff -r 999a9058a151 Documentation/lguest/lguest.c --- a/Documentation/lguest/lguest.c Tue May 08 19:49:33 2007 +1000 +++ b/Documentation/lguest/lguest.c Tue May 08 21:04:51 2007 +1000 @@ -860,6 +860,10 @@ static void setup_tun_net(const char *ar /* We are peer 0, ie. first slot. */ configure_device(ipfd, ifr.ifr_name, ip, dev->mem); + + /* Set "promisc" bit: we want every single packet. */ + *((u8 *)dev->mem) |= 0x1; + close(ipfd); verbose("device %p: tun net %u.%u.%u.%u\n", diff -r 999a...

...e, features, num_pages); + dev->desc = new_dev_desc(devices->descs, type, features, num_pages); dev->mem = (void *)(dev->desc->pfn * getpagesize()); dev->handle_input = handle_input; dev->watch_key = (unsigned long)dev->mem + watch_off; @@ -866,30 +869,6 @@ static void setup_tun_net(const char *ar verbose("attached to bridge: %s\n", br_name); } -/* Now we know how much memory we have, we copy in device descriptors */ -static void map_device_descriptors(struct device_list *devs, unsigned long mem) -{ - struct device *i; - unsigned int num; - struct lguest_device...

...e, features, num_pages); + dev->desc = new_dev_desc(devices->descs, type, features, num_pages); dev->mem = (void *)(dev->desc->pfn * getpagesize()); dev->handle_input = handle_input; dev->watch_key = (unsigned long)dev->mem + watch_off; @@ -866,30 +869,6 @@ static void setup_tun_net(const char *ar verbose("attached to bridge: %s\n", br_name); } -/* Now we know how much memory we have, we copy in device descriptors */ -static void map_device_descriptors(struct device_list *devs, unsigned long mem) -{ - struct device *i; - unsigned int num; - struct lguest_device...

This patch changes virtio_pci to use a shared memory area for virtio config info instead of using the PCI configuration space. This is closer semantically to what the virtio API exposes and is it a lot easier to implement on both ends. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index eb9a8e0..7e6e453 100644

This patch changes virtio_pci to use a shared memory area for virtio config info instead of using the PCI configuration space. This is closer semantically to what the virtio API exposes and is it a lot easier to implement on both ends. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index eb9a8e0..7e6e453 100644

virtio allows drivers to suppress callbacks (ie. interrupts) for efficiency (no locking, it's just an optimization). There's a similar mechanism for the host to suppress notifications coming from the guest: in that case, we ignore the suppression if the ring is completely full. It turns out that life is simpler if the host similarly ignores callback suppression when the ring is

virtio allows drivers to suppress callbacks (ie. interrupts) for efficiency (no locking, it's just an optimization). There's a similar mechanism for the host to suppress notifications coming from the guest: in that case, we ignore the suppression if the ring is completely full. It turns out that life is simpler if the host similarly ignores callback suppression when the ring is

The problem with introducing checksum offload and gso to tun is they need to set dev->features to enable GSO and/or checksumming, which is supposed to be done before register_netdevice(), ie. as part of TUNSETIFF. Unfortunately, TUNSETIFF has always just ignored flags it doesn't understand, so there's no good way of detecting whether the kernel supports new IFF_ flags. This patch

The problem with introducing checksum offload and gso to tun is they need to set dev->features to enable GSO and/or checksumming, which is supposed to be done before register_netdevice(), ie. as part of TUNSETIFF. Unfortunately, TUNSETIFF has always just ignored flags it doesn't understand, so there's no good way of detecting whether the kernel supports new IFF_ flags. This patch

...c unsigned long unpack_bzimage(int void *img = (void *)0x100000; f = gzdopen(fd, "rb"); - if (gzdirect(f)) - errx(1, "did not find correct gzip header"); while ((ret = gzread(f, img + len, 65536)) > 0) len += ret; if (ret < 0) @@ -820,6 +821,7 @@ static void setup_tun_net(const char *ar strcpy(ifr.ifr_name, "tap%d"); if (ioctl(netfd, TUNSETIFF, &ifr) != 0) err(1, "configuring /dev/net/tun"); + ioctl(netfd, TUNSETNOCSUM, 1); /* You will be peer 1: we should create enough jitter to randomize */ dev = new_device(devices, LGUEST_DEVI...

...c unsigned long unpack_bzimage(int void *img = (void *)0x100000; f = gzdopen(fd, "rb"); - if (gzdirect(f)) - errx(1, "did not find correct gzip header"); while ((ret = gzread(f, img + len, 65536)) > 0) len += ret; if (ret < 0) @@ -820,6 +821,7 @@ static void setup_tun_net(const char *ar strcpy(ifr.ifr_name, "tap%d"); if (ioctl(netfd, TUNSETIFF, &ifr) != 0) err(1, "configuring /dev/net/tun"); + ioctl(netfd, TUNSETNOCSUM, 1); /* You will be peer 1: we should create enough jitter to randomize */ dev = new_device(devices, LGUEST_DEVI...

...\n", if_name, br_name); + case ELOOP: + errx(1, "device %s is a bridge device itself; " + "can't enslave a bridge device to a bridge device.\n", + if_name); + default: + err(1, "can't add %s to bridge %s\n", if_name, br_name); + } +} + + +static void setup_tun_net(const char *arg, + struct lguest_device_desc *descs, + struct devices *devices) +{ + struct device *dev; + struct ifreq ifr; + int netfd, ipfd; + u32 ipaddr; + const char *br_name = NULL; + + netfd = open("/dev/net/tun", O_RDWR); + if (netfd < 0) + err(1, "opening /dev/ne...

...\n", if_name, br_name); + case ELOOP: + errx(1, "device %s is a bridge device itself; " + "can't enslave a bridge device to a bridge device.\n", + if_name); + default: + err(1, "can't add %s to bridge %s\n", if_name, br_name); + } +} + + +static void setup_tun_net(const char *arg, + struct lguest_device_desc *descs, + struct devices *devices) +{ + struct device *dev; + struct ifreq ifr; + int netfd, ipfd; + u32 ipaddr; + const char *br_name = NULL; + + netfd = open("/dev/net/tun", O_RDWR); + if (netfd < 0) + err(1, "opening /dev/ne...

...fr.ifr_flags = IFF_UP; + if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) + err(1, "Bringing interface %s up", devname); + + if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) + err(1, "getting hw address for %s", devname); + + memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, 6); +} + +static void setup_tun_net(const char *arg, struct device_list *devices) +{ + struct device *dev; + struct ifreq ifr; + int netfd, ipfd; + u32 ip; + const char *br_name = NULL; + + netfd = open_or_die("/dev/net/tun", O_RDWR); + memset(&ifr, 0, sizeof(ifr)); + ifr.ifr_flags = IFF_TAP | IFF_NO_PI; + strcpy(ifr.if...

...fr.ifr_flags = IFF_UP; + if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) + err(1, "Bringing interface %s up", devname); + + if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) + err(1, "getting hw address for %s", devname); + + memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, 6); +} + +static void setup_tun_net(const char *arg, struct device_list *devices) +{ + struct device *dev; + struct ifreq ifr; + int netfd, ipfd; + u32 ip; + const char *br_name = NULL; + + netfd = open_or_die("/dev/net/tun", O_RDWR); + memset(&ifr, 0, sizeof(ifr)); + ifr.ifr_flags = IFF_TAP | IFF_NO_PI; + strcpy(ifr.if...

...der. The first network device on the command line + * is eth0, the first block device /dev/vda, etc. */ + if (devices.lastdev) + devices.lastdev->next = dev; + else + devices.dev = dev; + devices.lastdev = dev; + return dev; } @@ -1220,7 +1250,7 @@ static void setup_tun_net(const char *arg) int netfd, ipfd; u32 ip; const char *br_name = NULL; - u8 hwaddr[6]; + struct virtio_net_config conf; /* We open the /dev/net/tun device and tell it we want a tap device. A * tap device is like a tun device, only somehow different. To tell @@ -12...

...der. The first network device on the command line + * is eth0, the first block device /dev/vda, etc. */ + if (devices.lastdev) + devices.lastdev->next = dev; + else + devices.dev = dev; + devices.lastdev = dev; + return dev; } @@ -1220,7 +1250,7 @@ static void setup_tun_net(const char *arg) int netfd, ipfd; u32 ip; const char *br_name = NULL; - u8 hwaddr[6]; + struct virtio_net_config conf; /* We open the /dev/net/tun device and tell it we want a tap device. A * tap device is like a tun device, only somehow different. To tell @@ -12...

Hi all, These are the patches I'm planning to submit for 2.6.24. Comments gratefully accepted. Along with the usual cleanups and improvements are Jes' de-i386-ification patches, and a new "virtio" mechanism designed to be shared with KVM (and hopefully other hypervisors). Cheers, Rusty. Documentation/lguest/Makefile | 30 Documentation/lguest/lguest.c

Hi all, These are the patches I'm planning to submit for 2.6.24. Comments gratefully accepted. Along with the usual cleanups and improvements are Jes' de-i386-ification patches, and a new "virtio" mechanism designed to be shared with KVM (and hopefully other hypervisors). Cheers, Rusty. Documentation/lguest/Makefile | 30 Documentation/lguest/lguest.c