summaryrefslogtreecommitdiff
path: root/net/ipv4/ip_output.c
diff options
context:
space:
mode:
authorWillem de Bruijn <willemb@google.com>2019-09-11 15:50:51 -0400
committerDavid S. Miller <davem@davemloft.net>2019-09-13 21:44:19 +0200
commitc6af0c227a22bb6bb8ff72f043e0fb6d99fd6515 (patch)
tree12f4f3b38877b029a5342e2a8f63d8131dad9b27 /net/ipv4/ip_output.c
parent823eb2a3c4c7f1b3e749f0dddb70bf8b09a76a10 (diff)
ip: support SO_MARK cmsg
Enable setting skb->mark for UDP and RAW sockets using cmsg. This is analogous to existing support for TOS, TTL, txtime, etc. Packet sockets already support this as of commit c7d39e32632e ("packet: support per-packet fwmark for af_packet sendmsg"). Similar to other fields, implement by 1. initialize the sockcm_cookie.mark from socket option sk_mark 2. optionally overwrite this in ip_cmsg_send/ip6_datagram_send_ctl 3. initialize inet_cork.mark from sockcm_cookie.mark 4. initialize each (usually just one) skb->mark from inet_cork.mark Step 1 is handled in one location for most protocols by ipcm_init_sk as of commit 351782067b6b ("ipv4: ipcm_cookie initializers"). Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_output.c')
-rw-r--r--net/ipv4/ip_output.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index cc7ef0d05bbd..5eb73775c3f7 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1266,6 +1266,7 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork,
cork->length = 0;
cork->ttl = ipc->ttl;
cork->tos = ipc->tos;
+ cork->mark = ipc->sockc.mark;
cork->priority = ipc->priority;
cork->transmit_time = ipc->sockc.transmit_time;
cork->tx_flags = 0;
@@ -1529,7 +1530,7 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
}
skb->priority = (cork->tos != -1) ? cork->priority: sk->sk_priority;
- skb->mark = sk->sk_mark;
+ skb->mark = cork->mark;
skb->tstamp = cork->transmit_time;
/*
* Steal rt from cork.dst to avoid a pair of atomic_inc/atomic_dec