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Diffstat (limited to 'drivers/net/tun.c')
-rw-r--r--drivers/net/tun.c62
1 files changed, 29 insertions, 33 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 8c8dc16839a7..857dca47bf80 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -65,7 +65,6 @@
#include <linux/nsproxy.h>
#include <linux/virtio_net.h>
#include <linux/rcupdate.h>
-#include <net/ipv6.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/rtnetlink.h>
@@ -124,10 +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)
@@ -187,7 +185,7 @@ struct tun_struct {
struct net_device *dev;
netdev_features_t set_features;
#define TUN_USER_FEATURES (NETIF_F_HW_CSUM|NETIF_F_TSO_ECN|NETIF_F_TSO| \
- NETIF_F_TSO6)
+ NETIF_F_TSO6|NETIF_F_UFO)
int vnet_hdr_sz;
int sndbuf;
@@ -258,7 +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;
@@ -375,10 +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
@@ -1167,8 +1162,6 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
break;
}
- skb_reset_network_header(skb);
-
if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
pr_debug("GSO!\n");
switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
@@ -1179,20 +1172,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
break;
case VIRTIO_NET_HDR_GSO_UDP:
- {
- static bool warned;
-
- if (!warned) {
- warned = true;
- netdev_warn(tun->dev,
- "%s: using disabled UFO feature; please fix this program\n",
- current->comm);
- }
skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
- if (skb->protocol == htons(ETH_P_IPV6))
- ipv6_proxy_select_ident(skb);
break;
- }
default:
tun->dev->stats.rx_frame_errors++;
kfree_skb(skb);
@@ -1221,6 +1202,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG;
}
+ skb_reset_network_header(skb);
skb_probe_transport_header(skb, 0);
rxhash = skb_get_hash(skb);
@@ -1261,7 +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)
@@ -1298,6 +1280,8 @@ static ssize_t tun_put_user(struct tun_struct *tun,
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 if (sinfo->gso_type & SKB_GSO_UDP)
+ gso.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else {
pr_err("unexpected GSO type: "
"0x%x, gso_size %d, hdr_len %d\n",
@@ -1338,7 +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);
@@ -1380,7 +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))
@@ -1501,7 +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;
}
@@ -1566,6 +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;
@@ -1646,6 +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;
@@ -1681,11 +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);
@@ -1746,6 +1737,11 @@ static int set_offload(struct tun_struct *tun, unsigned long arg)
features |= NETIF_F_TSO6;
arg &= ~(TUN_F_TSO4|TUN_F_TSO6);
}
+
+ if (arg & TUN_F_UFO) {
+ features |= NETIF_F_UFO;
+ arg &= ~TUN_F_UFO;
+ }
}
/* This gives the user a way to test for new features in future by
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 08:04:23 +0100