/*
* Changes:
*
+ * Brian Braunstein <linuxkernel@bristyle.com> 2007/03/23
+ * Fixed hw address handling. Now net_device.dev_addr is kept consistent
+ * with tun.dev_addr when the address is set by this module.
+ *
* Mike Kershaw <dragorn@kismetwireless.net> 2005/08/14
* Add TUNSETLINK ioctl to set the link encapsulation
*
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/crc32.h>
+#include <linux/nsproxy.h>
+#include <linux/virtio_net.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
#include <asm/system.h>
#include <asm/uaccess.h>
+/* Uncomment to enable debugging */
+/* #define TUN_DEBUG 1 */
+
#ifdef TUN_DEBUG
static int debug;
+
+#define DBG if(tun->debug)printk
+#define DBG1 if(debug==2)printk
+#else
+#define DBG( a... )
+#define DBG1( a... )
+#endif
+
+struct tun_struct {
+ struct list_head list;
+ unsigned long flags;
+ int attached;
+ uid_t owner;
+ gid_t group;
+
+ wait_queue_head_t read_wait;
+ struct sk_buff_head readq;
+
+ struct net_device *dev;
+
+ struct fasync_struct *fasync;
+
+ unsigned long if_flags;
+ u8 dev_addr[ETH_ALEN];
+ u32 chr_filter[2];
+ u32 net_filter[2];
+
+#ifdef TUN_DEBUG
+ int debug;
#endif
+};
/* Network device part of the driver */
-static LIST_HEAD(tun_dev_list);
+static unsigned int tun_net_id;
+struct tun_net {
+ struct list_head dev_list;
+};
+
static const struct ethtool_ops tun_ethtool_ops;
/* Net device open. */
/* We won't see all dropped packets individually, so overrun
* error is more appropriate. */
- tun->stats.tx_fifo_errors++;
+ dev->stats.tx_fifo_errors++;
} else {
/* Single queue mode.
* Driver handles dropping of all packets itself. */
return 0;
drop:
- tun->stats.tx_dropped++;
+ dev->stats.tx_dropped++;
kfree_skb(skb);
return 0;
}
struct tun_struct *tun = netdev_priv(dev);
const struct dev_mc_list *mclist;
int i;
+ DECLARE_MAC_BUF(mac);
DBG(KERN_DEBUG "%s: tun_net_mclist: mc_count %d\n",
dev->name, dev->mc_count);
memset(tun->chr_filter, 0, sizeof tun->chr_filter);
for (i = 0, mclist = dev->mc_list; i < dev->mc_count && mclist != NULL;
i++, mclist = mclist->next) {
add_multi(tun->net_filter, mclist->dmi_addr);
- DBG(KERN_DEBUG "%s: tun_net_mclist: %x:%x:%x:%x:%x:%x\n",
- dev->name,
- mclist->dmi_addr[0], mclist->dmi_addr[1], mclist->dmi_addr[2],
- mclist->dmi_addr[3], mclist->dmi_addr[4], mclist->dmi_addr[5]);
+ DBG(KERN_DEBUG "%s: tun_net_mclist: %s\n",
+ dev->name, print_mac(mac, mclist->dmi_addr));
}
}
-static struct net_device_stats *tun_net_stats(struct net_device *dev)
+#define MIN_MTU 68
+#define MAX_MTU 65535
+
+static int
+tun_net_change_mtu(struct net_device *dev, int new_mtu)
{
- struct tun_struct *tun = netdev_priv(dev);
- return &tun->stats;
+ if (new_mtu < MIN_MTU || new_mtu + dev->hard_header_len > MAX_MTU)
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
}
/* Initialize net device. */
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->mtu = 1500;
+ dev->change_mtu = tun_net_change_mtu;
/* Zero header length */
dev->type = ARPHRD_NONE;
dev->set_multicast_list = tun_net_mclist;
ether_setup(dev);
- random_ether_addr(dev->dev_addr);
+ dev->change_mtu = tun_net_change_mtu;
+
+ /* random address already created for us by tun_set_iff, use it */
+ memcpy(dev->dev_addr, tun->dev_addr, min(sizeof(tun->dev_addr), sizeof(dev->dev_addr)) );
+
dev->tx_queue_len = TUN_READQ_SIZE; /* We prefer our own queue length */
break;
}
struct tun_pi pi = { 0, __constant_htons(ETH_P_IP) };
struct sk_buff *skb;
size_t len = count, align = 0;
+ struct virtio_net_hdr gso = { 0 };
if (!(tun->flags & TUN_NO_PI)) {
if ((len -= sizeof(pi)) > count)
return -EFAULT;
}
- if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV)
+ if (tun->flags & TUN_VNET_HDR) {
+ if ((len -= sizeof(gso)) > count)
+ return -EINVAL;
+
+ if (memcpy_fromiovec((void *)&gso, iv, sizeof(gso)))
+ return -EFAULT;
+
+ if (gso.hdr_len > len)
+ return -EINVAL;
+ }
+
+ if ((tun->flags & TUN_TYPE_MASK) == TUN_TAP_DEV) {
align = NET_IP_ALIGN;
+ if (unlikely(len < ETH_HLEN))
+ return -EINVAL;
+ }
if (!(skb = alloc_skb(len + align, GFP_KERNEL))) {
- tun->stats.rx_dropped++;
+ tun->dev->stats.rx_dropped++;
return -ENOMEM;
}
if (align)
skb_reserve(skb, align);
if (memcpy_fromiovec(skb_put(skb, len), iv, len)) {
- tun->stats.rx_dropped++;
+ tun->dev->stats.rx_dropped++;
kfree_skb(skb);
return -EFAULT;
}
- skb->dev = tun->dev;
+ if (gso.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
+ if (!skb_partial_csum_set(skb, gso.csum_start,
+ gso.csum_offset)) {
+ tun->dev->stats.rx_frame_errors++;
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+ } else if (tun->flags & TUN_NOCHECKSUM)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
switch (tun->flags & TUN_TYPE_MASK) {
case TUN_TUN_DEV:
- skb->mac.raw = skb->data;
+ if (tun->flags & TUN_NO_PI) {
+ switch (skb->data[0] & 0xf0) {
+ case 0x40:
+ pi.proto = htons(ETH_P_IP);
+ break;
+ case 0x60:
+ pi.proto = htons(ETH_P_IPV6);
+ break;
+ default:
+ tun->dev->stats.rx_dropped++;
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+ }
+
+ skb_reset_mac_header(skb);
skb->protocol = pi.proto;
+ skb->dev = tun->dev;
break;
case TUN_TAP_DEV:
skb->protocol = eth_type_trans(skb, tun->dev);
break;
};
- if (tun->flags & TUN_NOCHECKSUM)
- skb->ip_summed = CHECKSUM_UNNECESSARY;
+ if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
+ pr_debug("GSO!\n");
+ switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
+ case VIRTIO_NET_HDR_GSO_TCPV4:
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
+ break;
+ case VIRTIO_NET_HDR_GSO_TCPV6:
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
+ break;
+ default:
+ tun->dev->stats.rx_frame_errors++;
+ kfree_skb(skb);
+ return -EINVAL;
+ }
- netif_rx_ni(skb);
- tun->dev->last_rx = jiffies;
+ if (gso.gso_type & VIRTIO_NET_HDR_GSO_ECN)
+ skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
- tun->stats.rx_packets++;
- tun->stats.rx_bytes += len;
+ skb_shinfo(skb)->gso_size = gso.gso_size;
+ if (skb_shinfo(skb)->gso_size == 0) {
+ tun->dev->stats.rx_frame_errors++;
+ kfree_skb(skb);
+ return -EINVAL;
+ }
- return count;
-}
+ /* Header must be checked, and gso_segs computed. */
+ skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
+ skb_shinfo(skb)->gso_segs = 0;
+ }
-static inline size_t iov_total(const struct iovec *iv, unsigned long count)
-{
- unsigned long i;
- size_t len;
+ netif_rx_ni(skb);
+ tun->dev->last_rx = jiffies;
- for (i = 0, len = 0; i < count; i++)
- len += iv[i].iov_len;
+ tun->dev->stats.rx_packets++;
+ tun->dev->stats.rx_bytes += len;
- return len;
+ return count;
}
static ssize_t tun_chr_aio_write(struct kiocb *iocb, const struct iovec *iv,
DBG(KERN_INFO "%s: tun_chr_write %ld\n", tun->dev->name, count);
- return tun_get_user(tun, (struct iovec *) iv, iov_total(iv, count));
+ return tun_get_user(tun, (struct iovec *) iv, iov_length(iv, count));
}
/* Put packet to the user space buffer */
total += sizeof(pi);
}
+ if (tun->flags & TUN_VNET_HDR) {
+ struct virtio_net_hdr gso = { 0 }; /* no info leak */
+ if ((len -= sizeof(gso)) < 0)
+ return -EINVAL;
+
+ if (skb_is_gso(skb)) {
+ struct skb_shared_info *sinfo = skb_shinfo(skb);
+
+ /* This is a hint as to how much should be linear. */
+ gso.hdr_len = skb_headlen(skb);
+ gso.gso_size = sinfo->gso_size;
+ if (sinfo->gso_type & SKB_GSO_TCPV4)
+ gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
+ else if (sinfo->gso_type & SKB_GSO_TCPV6)
+ gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+ else
+ BUG();
+ if (sinfo->gso_type & SKB_GSO_TCP_ECN)
+ gso.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
+ } else
+ gso.gso_type = VIRTIO_NET_HDR_GSO_NONE;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ gso.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ gso.csum_start = skb->csum_start - skb_headroom(skb);
+ gso.csum_offset = skb->csum_offset;
+ } /* else everything is zero */
+
+ if (unlikely(memcpy_toiovec(iv, (void *)&gso, sizeof(gso))))
+ return -EFAULT;
+ total += sizeof(gso);
+ }
+
len = min_t(int, skb->len, len);
skb_copy_datagram_iovec(skb, 0, iv, len);
total += len;
- tun->stats.tx_packets++;
- tun->stats.tx_bytes += len;
+ tun->dev->stats.tx_packets++;
+ tun->dev->stats.tx_bytes += len;
return total;
}
DECLARE_WAITQUEUE(wait, current);
struct sk_buff *skb;
ssize_t len, ret = 0;
+ DECLARE_MAC_BUF(mac);
if (!tun)
return -EBADFD;
DBG(KERN_INFO "%s: tun_chr_read\n", tun->dev->name);
- len = iov_total(iv, count);
+ len = iov_length(iv, count);
if (len < 0)
return -EINVAL;
* - we are multicast promiscous.
* - we belong to the multicast group.
*/
- memcpy(addr, skb->data,
- min_t(size_t, sizeof addr, skb->len));
+ skb_copy_from_linear_data(skb, addr, min_t(size_t, sizeof addr,
+ skb->len));
bit_nr = ether_crc(sizeof addr, addr) >> 26;
if ((tun->if_flags & IFF_PROMISC) ||
memcmp(addr, tun->dev_addr, sizeof addr) == 0 ||
(addr[0] == 0x33 && addr[1] == 0x33)) &&
((tun->if_flags & IFF_ALLMULTI) ||
(tun->chr_filter[bit_nr >> 5] & (1 << (bit_nr & 31)))))) {
- DBG(KERN_DEBUG "%s: tun_chr_readv: accepted: %x:%x:%x:%x:%x:%x\n",
- tun->dev->name, addr[0], addr[1], addr[2],
- addr[3], addr[4], addr[5]);
+ DBG(KERN_DEBUG "%s: tun_chr_readv: accepted: %s\n",
+ tun->dev->name, print_mac(mac, addr));
ret = tun_put_user(tun, skb, (struct iovec *) iv, len);
kfree_skb(skb);
break;
} else {
- DBG(KERN_DEBUG "%s: tun_chr_readv: rejected: %x:%x:%x:%x:%x:%x\n",
- tun->dev->name, addr[0], addr[1], addr[2],
- addr[3], addr[4], addr[5]);
+ DBG(KERN_DEBUG "%s: tun_chr_readv: rejected: %s\n",
+ tun->dev->name, print_mac(mac, addr));
kfree_skb(skb);
continue;
}
init_waitqueue_head(&tun->read_wait);
tun->owner = -1;
+ tun->group = -1;
- SET_MODULE_OWNER(dev);
dev->open = tun_net_open;
dev->hard_start_xmit = tun_net_xmit;
dev->stop = tun_net_close;
- dev->get_stats = tun_net_stats;
dev->ethtool_ops = &tun_ethtool_ops;
dev->destructor = free_netdev;
+ dev->features |= NETIF_F_NETNS_LOCAL;
}
-static struct tun_struct *tun_get_by_name(const char *name)
+static struct tun_struct *tun_get_by_name(struct tun_net *tn, const char *name)
{
struct tun_struct *tun;
ASSERT_RTNL();
- list_for_each_entry(tun, &tun_dev_list, list) {
+ list_for_each_entry(tun, &tn->dev_list, list) {
if (!strncmp(tun->dev->name, name, IFNAMSIZ))
return tun;
}
return NULL;
}
-static int tun_set_iff(struct file *file, struct ifreq *ifr)
+static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
{
+ struct tun_net *tn;
struct tun_struct *tun;
struct net_device *dev;
int err;
- tun = tun_get_by_name(ifr->ifr_name);
+ tn = net_generic(net, tun_net_id);
+ tun = tun_get_by_name(tn, ifr->ifr_name);
if (tun) {
if (tun->attached)
return -EBUSY;
/* Check permissions */
- if (tun->owner != -1 &&
- current->euid != tun->owner && !capable(CAP_NET_ADMIN))
+ if (((tun->owner != -1 &&
+ current->euid != tun->owner) ||
+ (tun->group != -1 &&
+ current->egid != tun->group)) &&
+ !capable(CAP_NET_ADMIN))
return -EPERM;
}
- else if (__dev_get_by_name(ifr->ifr_name))
+ else if (__dev_get_by_name(net, ifr->ifr_name))
return -EINVAL;
else {
char *name;
if (!dev)
return -ENOMEM;
+ dev_net_set(dev, net);
tun = netdev_priv(dev);
tun->dev = dev;
tun->flags = flags;
/* Be promiscuous by default to maintain previous behaviour. */
tun->if_flags = IFF_PROMISC;
/* Generate random Ethernet address. */
- *(u16 *)tun->dev_addr = htons(0x00FF);
+ *(__be16 *)tun->dev_addr = htons(0x00FF);
get_random_bytes(tun->dev_addr + sizeof(u16), 4);
memset(tun->chr_filter, 0, sizeof tun->chr_filter);
if (err < 0)
goto err_free_dev;
- list_add(&tun->list, &tun_dev_list);
+ list_add(&tun->list, &tn->dev_list);
}
DBG(KERN_INFO "%s: tun_set_iff\n", tun->dev->name);
if (ifr->ifr_flags & IFF_NO_PI)
tun->flags |= TUN_NO_PI;
+ else
+ tun->flags &= ~TUN_NO_PI;
if (ifr->ifr_flags & IFF_ONE_QUEUE)
tun->flags |= TUN_ONE_QUEUE;
+ else
+ tun->flags &= ~TUN_ONE_QUEUE;
+
+ if (ifr->ifr_flags & IFF_VNET_HDR)
+ tun->flags |= TUN_VNET_HDR;
+ else
+ tun->flags &= ~TUN_VNET_HDR;
file->private_data = tun;
tun->attached = 1;
+ get_net(dev_net(tun->dev));
strcpy(ifr->ifr_name, tun->dev->name);
return 0;
return err;
}
+/* This is like a cut-down ethtool ops, except done via tun fd so no
+ * privs required. */
+static int set_offload(struct net_device *dev, unsigned long arg)
+{
+ unsigned int old_features, features;
+
+ old_features = dev->features;
+ /* Unset features, set them as we chew on the arg. */
+ features = (old_features & ~(NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST
+ |NETIF_F_TSO_ECN|NETIF_F_TSO|NETIF_F_TSO6));
+
+ if (arg & TUN_F_CSUM) {
+ features |= NETIF_F_HW_CSUM|NETIF_F_SG|NETIF_F_FRAGLIST;
+ arg &= ~TUN_F_CSUM;
+
+ if (arg & (TUN_F_TSO4|TUN_F_TSO6)) {
+ if (arg & TUN_F_TSO_ECN) {
+ features |= NETIF_F_TSO_ECN;
+ arg &= ~TUN_F_TSO_ECN;
+ }
+ if (arg & TUN_F_TSO4)
+ features |= NETIF_F_TSO;
+ if (arg & TUN_F_TSO6)
+ features |= NETIF_F_TSO6;
+ arg &= ~(TUN_F_TSO4|TUN_F_TSO6);
+ }
+ }
+
+ /* This gives the user a way to test for new features in future by
+ * trying to set them. */
+ if (arg)
+ return -EINVAL;
+
+ dev->features = features;
+ if (old_features != dev->features)
+ netdev_features_change(dev);
+
+ return 0;
+}
+
static int tun_chr_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct tun_struct *tun = file->private_data;
void __user* argp = (void __user*)arg;
struct ifreq ifr;
+ DECLARE_MAC_BUF(mac);
if (cmd == TUNSETIFF || _IOC_TYPE(cmd) == 0x89)
if (copy_from_user(&ifr, argp, sizeof ifr))
ifr.ifr_name[IFNAMSIZ-1] = '\0';
rtnl_lock();
- err = tun_set_iff(file, &ifr);
+ err = tun_set_iff(current->nsproxy->net_ns, file, &ifr);
rtnl_unlock();
if (err)
return 0;
}
+ if (cmd == TUNGETFEATURES) {
+ /* Currently this just means: "what IFF flags are valid?".
+ * This is needed because we never checked for invalid flags on
+ * TUNSETIFF. */
+ return put_user(IFF_TUN | IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE |
+ IFF_VNET_HDR,
+ (unsigned int __user*)argp);
+ }
+
if (!tun)
return -EBADFD;
tun->flags &= ~TUN_PERSIST;
DBG(KERN_INFO "%s: persist %s\n",
- tun->dev->name, arg ? "disabled" : "enabled");
+ tun->dev->name, arg ? "enabled" : "disabled");
break;
case TUNSETOWNER:
DBG(KERN_INFO "%s: owner set to %d\n", tun->dev->name, tun->owner);
break;
+ case TUNSETGROUP:
+ /* Set group of the device */
+ tun->group= (gid_t) arg;
+
+ DBG(KERN_INFO "%s: group set to %d\n", tun->dev->name, tun->group);
+ break;
+
case TUNSETLINK:
+ {
+ int ret;
+
/* Only allow setting the type when the interface is down */
+ rtnl_lock();
if (tun->dev->flags & IFF_UP) {
DBG(KERN_INFO "%s: Linktype set failed because interface is up\n",
tun->dev->name);
- return -EBUSY;
+ ret = -EBUSY;
} else {
tun->dev->type = (int) arg;
DBG(KERN_INFO "%s: linktype set to %d\n", tun->dev->name, tun->dev->type);
+ ret = 0;
}
- break;
+ rtnl_unlock();
+ return ret;
+ }
#ifdef TUN_DEBUG
case TUNSETDEBUG:
break;
#endif
+ case TUNSETOFFLOAD:
+ {
+ int ret;
+ rtnl_lock();
+ ret = set_offload(tun->dev, arg);
+ rtnl_unlock();
+ return ret;
+ }
+
case SIOCGIFFLAGS:
ifr.ifr_flags = tun->if_flags;
if (copy_to_user( argp, &ifr, sizeof ifr))
return 0;
case SIOCGIFHWADDR:
+ /* Note: the actual net device's address may be different */
memcpy(ifr.ifr_hwaddr.sa_data, tun->dev_addr,
min(sizeof ifr.ifr_hwaddr.sa_data, sizeof tun->dev_addr));
if (copy_to_user( argp, &ifr, sizeof ifr))
return 0;
case SIOCSIFHWADDR:
- /** Set the character device's hardware address. This is used when
- * filtering packets being sent from the network device to the character
- * device. */
- memcpy(tun->dev_addr, ifr.ifr_hwaddr.sa_data,
- min(sizeof ifr.ifr_hwaddr.sa_data, sizeof tun->dev_addr));
- DBG(KERN_DEBUG "%s: set hardware address: %x:%x:%x:%x:%x:%x\n",
- tun->dev->name,
- tun->dev_addr[0], tun->dev_addr[1], tun->dev_addr[2],
- tun->dev_addr[3], tun->dev_addr[4], tun->dev_addr[5]);
- return 0;
+ {
+ /* try to set the actual net device's hw address */
+ int ret;
+
+ rtnl_lock();
+ ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr);
+ rtnl_unlock();
+
+ if (ret == 0) {
+ /** Set the character device's hardware address. This is used when
+ * filtering packets being sent from the network device to the character
+ * device. */
+ memcpy(tun->dev_addr, ifr.ifr_hwaddr.sa_data,
+ min(sizeof ifr.ifr_hwaddr.sa_data, sizeof tun->dev_addr));
+ DBG(KERN_DEBUG "%s: set hardware address: %x:%x:%x:%x:%x:%x\n",
+ tun->dev->name,
+ tun->dev_addr[0], tun->dev_addr[1], tun->dev_addr[2],
+ tun->dev_addr[3], tun->dev_addr[4], tun->dev_addr[5]);
+ }
+
+ return ret;
+ }
case SIOCADDMULTI:
/** Add the specified group to the character device's multicast filter
* list. */
+ rtnl_lock();
+ netif_tx_lock_bh(tun->dev);
add_multi(tun->chr_filter, ifr.ifr_hwaddr.sa_data);
- DBG(KERN_DEBUG "%s: add multi: %x:%x:%x:%x:%x:%x\n",
- tun->dev->name,
- (u8)ifr.ifr_hwaddr.sa_data[0], (u8)ifr.ifr_hwaddr.sa_data[1],
- (u8)ifr.ifr_hwaddr.sa_data[2], (u8)ifr.ifr_hwaddr.sa_data[3],
- (u8)ifr.ifr_hwaddr.sa_data[4], (u8)ifr.ifr_hwaddr.sa_data[5]);
+ netif_tx_unlock_bh(tun->dev);
+ rtnl_unlock();
+
+ DBG(KERN_DEBUG "%s: add multi: %s\n",
+ tun->dev->name, print_mac(mac, ifr.ifr_hwaddr.sa_data));
return 0;
case SIOCDELMULTI:
/** Remove the specified group from the character device's multicast
* filter list. */
+ rtnl_lock();
+ netif_tx_lock_bh(tun->dev);
del_multi(tun->chr_filter, ifr.ifr_hwaddr.sa_data);
- DBG(KERN_DEBUG "%s: del multi: %x:%x:%x:%x:%x:%x\n",
- tun->dev->name,
- (u8)ifr.ifr_hwaddr.sa_data[0], (u8)ifr.ifr_hwaddr.sa_data[1],
- (u8)ifr.ifr_hwaddr.sa_data[2], (u8)ifr.ifr_hwaddr.sa_data[3],
- (u8)ifr.ifr_hwaddr.sa_data[4], (u8)ifr.ifr_hwaddr.sa_data[5]);
+ netif_tx_unlock_bh(tun->dev);
+ rtnl_unlock();
+
+ DBG(KERN_DEBUG "%s: del multi: %s\n",
+ tun->dev->name, print_mac(mac, ifr.ifr_hwaddr.sa_data));
return 0;
default:
return ret;
if (on) {
- ret = f_setown(file, current->pid, 0);
+ ret = __f_setown(file, task_pid(current), PIDTYPE_PID, 0);
if (ret)
return ret;
tun->flags |= TUN_FASYNC;
/* Detach from net device */
file->private_data = NULL;
tun->attached = 0;
+ put_net(dev_net(tun->dev));
/* Drop read queue */
skb_queue_purge(&tun->readq);
return 0;
}
-static struct file_operations tun_fops = {
+static const struct file_operations tun_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = do_sync_read,
.set_rx_csum = tun_set_rx_csum
};
-static int __init tun_init(void)
+static int tun_init_net(struct net *net)
{
- int ret = 0;
+ struct tun_net *tn;
- printk(KERN_INFO "tun: %s, %s\n", DRV_DESCRIPTION, DRV_VERSION);
- printk(KERN_INFO "tun: %s\n", DRV_COPYRIGHT);
+ tn = kmalloc(sizeof(*tn), GFP_KERNEL);
+ if (tn == NULL)
+ return -ENOMEM;
- ret = misc_register(&tun_miscdev);
- if (ret)
- printk(KERN_ERR "tun: Can't register misc device %d\n", TUN_MINOR);
- return ret;
+ INIT_LIST_HEAD(&tn->dev_list);
+
+ if (net_assign_generic(net, tun_net_id, tn)) {
+ kfree(tn);
+ return -ENOMEM;
+ }
+
+ return 0;
}
-static void tun_cleanup(void)
+static void tun_exit_net(struct net *net)
{
+ struct tun_net *tn;
struct tun_struct *tun, *nxt;
- misc_deregister(&tun_miscdev);
+ tn = net_generic(net, tun_net_id);
rtnl_lock();
- list_for_each_entry_safe(tun, nxt, &tun_dev_list, list) {
+ list_for_each_entry_safe(tun, nxt, &tn->dev_list, list) {
DBG(KERN_INFO "%s cleaned up\n", tun->dev->name);
unregister_netdevice(tun->dev);
}
rtnl_unlock();
+ kfree(tn);
+}
+
+static struct pernet_operations tun_net_ops = {
+ .init = tun_init_net,
+ .exit = tun_exit_net,
+};
+
+static int __init tun_init(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "tun: %s, %s\n", DRV_DESCRIPTION, DRV_VERSION);
+ printk(KERN_INFO "tun: %s\n", DRV_COPYRIGHT);
+
+ ret = register_pernet_gen_device(&tun_net_id, &tun_net_ops);
+ if (ret) {
+ printk(KERN_ERR "tun: Can't register pernet ops\n");
+ goto err_pernet;
+ }
+
+ ret = misc_register(&tun_miscdev);
+ if (ret) {
+ printk(KERN_ERR "tun: Can't register misc device %d\n", TUN_MINOR);
+ goto err_misc;
+ }
+ return 0;
+
+err_misc:
+ unregister_pernet_gen_device(tun_net_id, &tun_net_ops);
+err_pernet:
+ return ret;
+}
+
+static void tun_cleanup(void)
+{
+ misc_deregister(&tun_miscdev);
+ unregister_pernet_gen_device(tun_net_id, &tun_net_ops);
}
module_init(tun_init);