diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/skbuff.c | 1 | ||||
| -rw-r--r-- | net/core/sock.c | 5 | ||||
| -rw-r--r-- | net/packet/af_packet.c | 32 |
3 files changed, 34 insertions, 4 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index f3a530780753..6eb656acdfe5 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -592,6 +592,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old) new->rxhash = old->rxhash; new->ooo_okay = old->ooo_okay; new->l4_rxhash = old->l4_rxhash; + new->no_fcs = old->no_fcs; #ifdef CONFIG_XFRM new->sp = secpath_get(old->sp); #endif diff --git a/net/core/sock.c b/net/core/sock.c index 19942d4bb6e6..55011cb691ad 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -799,6 +799,11 @@ set_rcvbuf: else ret = -EOPNOTSUPP; break; + + case SO_NOFCS: + sock_valbool_flag(sk, SOCK_NOFCS, valbool); + break; + default: ret = -ENOPROTOOPT; break; diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 2dbb32b988c4..ae2d484416dd 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1459,6 +1459,7 @@ static int packet_sendmsg_spkt(struct kiocb *iocb, struct socket *sock, struct net_device *dev; __be16 proto = 0; int err; + int extra_len = 0; /* * Get and verify the address. @@ -1493,8 +1494,16 @@ retry: * raw protocol and you must do your own fragmentation at this level. */ + if (unlikely(sock_flag(sk, SOCK_NOFCS))) { + if (!netif_supports_nofcs(dev)) { + err = -EPROTONOSUPPORT; + goto out_unlock; + } + extra_len = 4; /* We're doing our own CRC */ + } + err = -EMSGSIZE; - if (len > dev->mtu + dev->hard_header_len + VLAN_HLEN) + if (len > dev->mtu + dev->hard_header_len + VLAN_HLEN + extra_len) goto out_unlock; if (!skb) { @@ -1526,7 +1535,7 @@ retry: goto retry; } - if (len > (dev->mtu + dev->hard_header_len)) { + if (len > (dev->mtu + dev->hard_header_len + extra_len)) { /* Earlier code assumed this would be a VLAN pkt, * double-check this now that we have the actual * packet in hand. @@ -1548,6 +1557,9 @@ retry: if (err < 0) goto out_unlock; + if (unlikely(extra_len == 4)) + skb->no_fcs = 1; + dev_queue_xmit(skb); rcu_read_unlock(); return len; @@ -2209,6 +2221,7 @@ static int packet_snd(struct socket *sock, struct packet_sock *po = pkt_sk(sk); unsigned short gso_type = 0; int hlen, tlen; + int extra_len = 0; /* * Get and verify the address. @@ -2288,8 +2301,16 @@ static int packet_snd(struct socket *sock, } } + if (unlikely(sock_flag(sk, SOCK_NOFCS))) { + if (!netif_supports_nofcs(dev)) { + err = -EPROTONOSUPPORT; + goto out_unlock; + } + extra_len = 4; /* We're doing our own CRC */ + } + err = -EMSGSIZE; - if (!gso_type && (len > dev->mtu + reserve + VLAN_HLEN)) + if (!gso_type && (len > dev->mtu + reserve + VLAN_HLEN + extra_len)) goto out_unlock; err = -ENOBUFS; @@ -2315,7 +2336,7 @@ static int packet_snd(struct socket *sock, if (err < 0) goto out_free; - if (!gso_type && (len > dev->mtu + reserve)) { + if (!gso_type && (len > dev->mtu + reserve + extra_len)) { /* Earlier code assumed this would be a VLAN pkt, * double-check this now that we have the actual * packet in hand. @@ -2353,6 +2374,9 @@ static int packet_snd(struct socket *sock, len += vnet_hdr_len; } + if (unlikely(extra_len == 4)) + skb->no_fcs = 1; + /* * Now send it */ |