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Diffstat (limited to 'net/packet')
-rw-r--r--net/packet/af_packet.c87
1 files changed, 19 insertions, 68 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 588ec202d5ba..49cd0c70a13a 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1967,17 +1967,6 @@ static unsigned int run_filter(struct sk_buff *skb,
return res;
}
-static int __packet_rcv_vnet(const struct sk_buff *skb,
- struct virtio_net_hdr *vnet_hdr)
-{
- *vnet_hdr = (const struct virtio_net_hdr) { 0 };
-
- if (virtio_net_hdr_from_skb(skb, vnet_hdr, vio_le()))
- BUG();
-
- return 0;
-}
-
static int packet_rcv_vnet(struct msghdr *msg, const struct sk_buff *skb,
size_t *len)
{
@@ -1987,7 +1976,7 @@ static int packet_rcv_vnet(struct msghdr *msg, const struct sk_buff *skb,
return -EINVAL;
*len -= sizeof(vnet_hdr);
- if (__packet_rcv_vnet(skb, &vnet_hdr))
+ if (virtio_net_hdr_from_skb(skb, &vnet_hdr, vio_le()))
return -EINVAL;
return memcpy_to_msg(msg, (void *)&vnet_hdr, sizeof(vnet_hdr));
@@ -2246,8 +2235,9 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
spin_unlock(&sk->sk_receive_queue.lock);
if (po->has_vnet_hdr) {
- if (__packet_rcv_vnet(skb, h.raw + macoff -
- sizeof(struct virtio_net_hdr))) {
+ if (virtio_net_hdr_from_skb(skb, h.raw + macoff -
+ sizeof(struct virtio_net_hdr),
+ vio_le())) {
spin_lock(&sk->sk_receive_queue.lock);
goto drop_n_account;
}
@@ -2390,8 +2380,6 @@ static void tpacket_set_protocol(const struct net_device *dev,
static int __packet_snd_vnet_parse(struct virtio_net_hdr *vnet_hdr, size_t len)
{
- unsigned short gso_type = 0;
-
if ((vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
(__virtio16_to_cpu(vio_le(), vnet_hdr->csum_start) +
__virtio16_to_cpu(vio_le(), vnet_hdr->csum_offset) + 2 >
@@ -2403,29 +2391,6 @@ static int __packet_snd_vnet_parse(struct virtio_net_hdr *vnet_hdr, size_t len)
if (__virtio16_to_cpu(vio_le(), vnet_hdr->hdr_len) > len)
return -EINVAL;
- if (vnet_hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
- switch (vnet_hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
- case VIRTIO_NET_HDR_GSO_TCPV4:
- gso_type = SKB_GSO_TCPV4;
- break;
- case VIRTIO_NET_HDR_GSO_TCPV6:
- gso_type = SKB_GSO_TCPV6;
- break;
- case VIRTIO_NET_HDR_GSO_UDP:
- gso_type = SKB_GSO_UDP;
- break;
- default:
- return -EINVAL;
- }
-
- if (vnet_hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN)
- gso_type |= SKB_GSO_TCP_ECN;
-
- if (vnet_hdr->gso_size == 0)
- return -EINVAL;
- }
-
- vnet_hdr->gso_type = gso_type; /* changes type, temporary storage */
return 0;
}
@@ -2442,27 +2407,6 @@ static int packet_snd_vnet_parse(struct msghdr *msg, size_t *len,
return __packet_snd_vnet_parse(vnet_hdr, *len);
}
-static int packet_snd_vnet_gso(struct sk_buff *skb,
- struct virtio_net_hdr *vnet_hdr)
-{
- if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
- u16 s = __virtio16_to_cpu(vio_le(), vnet_hdr->csum_start);
- u16 o = __virtio16_to_cpu(vio_le(), vnet_hdr->csum_offset);
-
- if (!skb_partial_csum_set(skb, s, o))
- return -EINVAL;
- }
-
- skb_shinfo(skb)->gso_size =
- __virtio16_to_cpu(vio_le(), vnet_hdr->gso_size);
- skb_shinfo(skb)->gso_type = vnet_hdr->gso_type;
-
- /* Header must be checked, and gso_segs computed. */
- skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
- skb_shinfo(skb)->gso_segs = 0;
- return 0;
-}
-
static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
void *frame, struct net_device *dev, void *data, int tp_len,
__be16 proto, unsigned char *addr, int hlen, int copylen,
@@ -2722,7 +2666,8 @@ tpacket_error:
}
}
- if (po->has_vnet_hdr && packet_snd_vnet_gso(skb, vnet_hdr)) {
+ if (po->has_vnet_hdr && virtio_net_hdr_to_skb(skb, vnet_hdr,
+ vio_le())) {
tp_len = -EINVAL;
goto tpacket_error;
}
@@ -2913,7 +2858,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
packet_pick_tx_queue(dev, skb);
if (po->has_vnet_hdr) {
- err = packet_snd_vnet_gso(skb, &vnet_hdr);
+ err = virtio_net_hdr_to_skb(skb, &vnet_hdr, vio_le());
if (err)
goto out_free;
len += sizeof(vnet_hdr);
@@ -3645,19 +3590,25 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (po->rx_ring.pg_vec || po->tx_ring.pg_vec)
- return -EBUSY;
if (copy_from_user(&val, optval, sizeof(val)))
return -EFAULT;
switch (val) {
case TPACKET_V1:
case TPACKET_V2:
case TPACKET_V3:
- po->tp_version = val;
- return 0;
+ break;
default:
return -EINVAL;
}
+ lock_sock(sk);
+ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) {
+ ret = -EBUSY;
+ } else {
+ po->tp_version = val;
+ ret = 0;
+ }
+ release_sock(sk);
+ return ret;
}
case PACKET_RESERVE:
{
@@ -4161,6 +4112,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
/* Added to avoid minimal code churn */
struct tpacket_req *req = &req_u->req;
+ lock_sock(sk);
/* Opening a Tx-ring is NOT supported in TPACKET_V3 */
if (!closing && tx_ring && (po->tp_version > TPACKET_V2)) {
net_warn_ratelimited("Tx-ring is not supported.\n");
@@ -4242,7 +4194,6 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
goto out;
}
- lock_sock(sk);
/* Detach socket from network */
spin_lock(&po->bind_lock);
@@ -4291,11 +4242,11 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
if (!tx_ring)
prb_shutdown_retire_blk_timer(po, rb_queue);
}
- release_sock(sk);
if (pg_vec)
free_pg_vec(pg_vec, order, req->tp_block_nr);
out:
+ release_sock(sk);
return err;
}
generated by cgit (git 2.34.1) at 2024-06-13 16:20:59 +0000