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| author |   Alexander Drozdov <al.drozdov@gmail.com> | 2015-03-23 09:11:13 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-03-23 22:01:28 -0400 |
| commit | 682f048bd49449f4ab978664a7f69a44a74e3caa (patch) | |
| tree | 4b623e8ddd2e4f874947e3c9f128591661dd10e8 /net/packet | |
| parent | af_packet: make tpacket_rcv to not set status value before run_filter (diff) | |
| download | linux-dev-682f048bd49449f4ab978664a7f69a44a74e3caa.tar.xz linux-dev-682f048bd49449f4ab978664a7f69a44a74e3caa.zip | |
af_packet: pass checksum validation status to the user
Introduce TP_STATUS_CSUM_VALID tp_status flag to tell the
af_packet user that at least the transport header checksum
has been already validated.
For now, the flag may be set for incoming packets only.
Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/af_packet.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 9d854c5ce0b5..5102c3cc4eec 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1924,6 +1924,10 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, if (skb->ip_summed == CHECKSUM_PARTIAL) status |= TP_STATUS_CSUMNOTREADY; + else if (skb->pkt_type != PACKET_OUTGOING && + (skb->ip_summed == CHECKSUM_COMPLETE || + skb_csum_unnecessary(skb))) + status |= TP_STATUS_CSUM_VALID; if (snaplen > res) snaplen = res; @@ -3031,6 +3035,11 @@ static int packet_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, aux.tp_status = TP_STATUS_USER; if (skb->ip_summed == CHECKSUM_PARTIAL) aux.tp_status |= TP_STATUS_CSUMNOTREADY; + else if (skb->pkt_type != PACKET_OUTGOING && + (skb->ip_summed == CHECKSUM_COMPLETE || + skb_csum_unnecessary(skb))) + aux.tp_status |= TP_STATUS_CSUM_VALID; + aux.tp_len = origlen; aux.tp_snaplen = skb->len; aux.tp_mac = 0; |