diff options
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 729ed533bb33..bfa9bb48e42d 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -352,7 +352,7 @@ static u16 tun_select_queue(struct net_device *dev, struct sk_buff *skb) u32 numqueues = 0; rcu_read_lock(); - numqueues = tun->numqueues; + numqueues = ACCESS_ONCE(tun->numqueues); txq = skb_get_rxhash(skb); if (txq) { @@ -409,14 +409,12 @@ static void __tun_detach(struct tun_file *tfile, bool clean) { struct tun_file *ntfile; struct tun_struct *tun; - struct net_device *dev; tun = rtnl_dereference(tfile->tun); if (tun && !tfile->detached) { u16 index = tfile->queue_index; BUG_ON(index >= tun->numqueues); - dev = tun->dev; rcu_assign_pointer(tun->tfiles[index], tun->tfiles[tun->numqueues - 1]); @@ -1205,6 +1203,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, } skb_reset_network_header(skb); + skb_probe_transport_header(skb, 0); + rxhash = skb_get_rxhash(skb); netif_rx_ni(skb); @@ -1471,14 +1471,17 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock, if (!tun) return -EBADFD; - if (flags & ~(MSG_DONTWAIT|MSG_TRUNC)) - return -EINVAL; + if (flags & ~(MSG_DONTWAIT|MSG_TRUNC)) { + ret = -EINVAL; + goto out; + } ret = tun_do_read(tun, tfile, iocb, m->msg_iov, total_len, flags & MSG_DONTWAIT); if (ret > total_len) { m->msg_flags |= MSG_TRUNC; ret = flags & MSG_TRUNC ? ret : total_len; } +out: tun_put(tun); return ret; } @@ -1582,6 +1585,10 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) else return -EINVAL; + if (!!(ifr->ifr_flags & IFF_MULTI_QUEUE) != + !!(tun->flags & TUN_TAP_MQ)) + return -EINVAL; + if (tun_not_capable(tun)) return -EPERM; err = security_tun_dev_open(tun->security); @@ -1593,8 +1600,12 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) return err; if (tun->flags & TUN_TAP_MQ && - (tun->numqueues + tun->numdisabled > 1)) - return -EBUSY; + (tun->numqueues + tun->numdisabled > 1)) { + /* One or more queue has already been attached, no need + * to initialize the device again. + */ + return 0; + } } else { char *name; @@ -1656,6 +1667,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | TUN_USER_FEATURES; dev->features = dev->hw_features; + dev->vlan_features = dev->features; INIT_LIST_HEAD(&tun->disabled); err = tun_attach(tun, file); @@ -2147,6 +2159,8 @@ static int tun_chr_open(struct inode *inode, struct file * file) set_bit(SOCK_EXTERNALLY_ALLOCATED, &tfile->socket.flags); INIT_LIST_HEAD(&tfile->next); + sock_set_flag(&tfile->sk, SOCK_ZEROCOPY); + return 0; } |