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path: root/drivers/net/tun.c
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Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r--drivers/net/tun.c68
1 files changed, 34 insertions, 34 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 62b2b300501..1f764469597 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -62,6 +62,7 @@
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/crc32.h>
+#include <net/net_namespace.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -109,7 +110,7 @@ static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
/* 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. */
@@ -128,7 +129,7 @@ static int tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
return 0;
drop:
- tun->stats.tx_dropped++;
+ dev->stats.tx_dropped++;
kfree_skb(skb);
return 0;
}
@@ -158,23 +159,28 @@ tun_net_mclist(struct net_device *dev)
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. */
@@ -188,6 +194,7 @@ static void tun_net_init(struct net_device *dev)
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;
@@ -200,6 +207,7 @@ static void tun_net_init(struct net_device *dev)
dev->set_multicast_list = tun_net_mclist;
ether_setup(dev);
+ 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)) );
@@ -249,14 +257,14 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
align = NET_IP_ALIGN;
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;
}
@@ -278,8 +286,8 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
netif_rx_ni(skb);
tun->dev->last_rx = jiffies;
- tun->stats.rx_packets++;
- tun->stats.rx_bytes += len;
+ tun->dev->stats.rx_packets++;
+ tun->dev->stats.rx_bytes += len;
return count;
}
@@ -335,8 +343,8 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun,
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;
}
@@ -349,6 +357,7 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv,
DECLARE_WAITQUEUE(wait, current);
struct sk_buff *skb;
ssize_t len, ret = 0;
+ DECLARE_MAC_BUF(mac);
if (!tun)
return -EBADFD;
@@ -403,16 +412,14 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv,
(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;
}
@@ -434,11 +441,9 @@ static void tun_setup(struct net_device *dev)
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;
}
@@ -475,7 +480,7 @@ static int tun_set_iff(struct file *file, struct ifreq *ifr)
!capable(CAP_NET_ADMIN))
return -EPERM;
}
- else if (__dev_get_by_name(ifr->ifr_name))
+ else if (__dev_get_by_name(&init_net, ifr->ifr_name))
return -EINVAL;
else {
char *name;
@@ -557,6 +562,7 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
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))
@@ -685,22 +691,16 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
/** Add the specified group to the character device's multicast filter
* list. */
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]);
+ 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. */
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]);
+ DBG(KERN_DEBUG "%s: del multi: %s\n",
+ tun->dev->name, print_mac(mac, ifr.ifr_hwaddr.sa_data));
return 0;
default:
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 22:16:35 +0000