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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.c37
1 files changed, 20 insertions, 17 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 10f9e4021b5a..857dca47bf80 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -123,10 +123,9 @@ struct tap_filter {
unsigned char addr[FLT_EXACT_COUNT][ETH_ALEN];
};
-/* DEFAULT_MAX_NUM_RSS_QUEUES were chosen to let the rx/tx queues allocated for
- * the netdevice to be fit in one page. So we can make sure the success of
- * memory allocation. TODO: increase the limit. */
-#define MAX_TAP_QUEUES DEFAULT_MAX_NUM_RSS_QUEUES
+/* MAX_TAP_QUEUES 256 is chosen to allow rx/tx queues to be equal
+ * to max number of VCPUs in guest. */
+#define MAX_TAP_QUEUES 256
#define MAX_TAP_FLOWS 4096
#define TUN_FLOW_EXPIRE (3 * HZ)
@@ -257,7 +256,6 @@ static void tun_flow_delete(struct tun_struct *tun, struct tun_flow_entry *e)
{
tun_debug(KERN_INFO, tun, "delete flow: hash %u index %u\n",
e->rxhash, e->queue_index);
- sock_rps_reset_flow_hash(e->rps_rxhash);
hlist_del_rcu(&e->hash_link);
kfree_rcu(e, rcu);
--tun->flow_count;
@@ -374,10 +372,8 @@ unlock:
*/
static inline void tun_flow_save_rps_rxhash(struct tun_flow_entry *e, u32 hash)
{
- if (unlikely(e->rps_rxhash != hash)) {
- sock_rps_reset_flow_hash(e->rps_rxhash);
+ if (unlikely(e->rps_rxhash != hash))
e->rps_rxhash = hash;
- }
}
/* We try to identify a flow through its rxhash first. The reason that
@@ -1247,7 +1243,7 @@ static ssize_t tun_put_user(struct tun_struct *tun,
int vlan_hlen = 0;
int vnet_hdr_sz = 0;
- if (vlan_tx_tag_present(skb))
+ if (skb_vlan_tag_present(skb))
vlan_hlen = VLAN_HLEN;
if (tun->flags & IFF_VNET_HDR)
@@ -1326,7 +1322,7 @@ static ssize_t tun_put_user(struct tun_struct *tun,
} veth;
veth.h_vlan_proto = skb->vlan_proto;
- veth.h_vlan_TCI = htons(vlan_tx_tag_get(skb));
+ veth.h_vlan_TCI = htons(skb_vlan_tag_get(skb));
vlan_offset = offsetof(struct vlan_ethhdr, h_vlan_proto);
@@ -1368,7 +1364,7 @@ static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile,
skb = __skb_recv_datagram(tfile->socket.sk, noblock ? MSG_DONTWAIT : 0,
&peeked, &off, &err);
if (!skb)
- return 0;
+ return err;
ret = tun_put_user(tun, tfile, skb, to);
if (unlikely(ret < 0))
@@ -1489,7 +1485,7 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock,
goto out;
}
ret = tun_do_read(tun, tfile, &m->msg_iter, flags & MSG_DONTWAIT);
- if (ret > total_len) {
+ if (ret > (ssize_t)total_len) {
m->msg_flags |= MSG_TRUNC;
ret = flags & MSG_TRUNC ? ret : total_len;
}
@@ -1554,6 +1550,17 @@ static DEVICE_ATTR(tun_flags, 0444, tun_show_flags, NULL);
static DEVICE_ATTR(owner, 0444, tun_show_owner, NULL);
static DEVICE_ATTR(group, 0444, tun_show_group, NULL);
+static struct attribute *tun_dev_attrs[] = {
+ &dev_attr_tun_flags.attr,
+ &dev_attr_owner.attr,
+ &dev_attr_group.attr,
+ NULL
+};
+
+static const struct attribute_group tun_attr_group = {
+ .attrs = tun_dev_attrs
+};
+
static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
{
struct tun_struct *tun;
@@ -1634,6 +1641,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
dev_net_set(dev, net);
dev->rtnl_link_ops = &tun_link_ops;
dev->ifindex = tfile->ifindex;
+ dev->sysfs_groups[0] = &tun_attr_group;
tun = netdev_priv(dev);
tun->dev = dev;
@@ -1669,11 +1677,6 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
err = register_netdevice(tun->dev);
if (err < 0)
goto err_detach;
-
- if (device_create_file(&tun->dev->dev, &dev_attr_tun_flags) ||
- device_create_file(&tun->dev->dev, &dev_attr_owner) ||
- device_create_file(&tun->dev->dev, &dev_attr_group))
- pr_err("Failed to create tun sysfs files\n");
}
netif_carrier_on(tun->dev);