diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2017-08-03 18:07:08 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-06 20:51:12 -0700 |
| commit | 3bdefdf9d9c2a972085742578b08d99f14c09555 (patch) | |
| tree | ae76e777f002bfe770d8c5146abe4427022b0dde | |
| parent | 61a1030bad628f7264cd5e5d0f4d71b5488eb4a4 (diff) | |
| download | linux-3bdefdf9d9c2a972085742578b08d99f14c09555.tar.bz2 | |
udp: no need to preserve skb->dst
__ip_options_echo() does not need anymore skb->dst, so we can
avoid explicitly preserving it for its own sake.
This is almost a revert of commit 0ddf3fb2c43d ("udp: preserve
skb->dst if required for IP options processing") plus some
lifting to fit later changes.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/udp.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index e6276fa3750b..38bca2c4897d 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1176,7 +1176,11 @@ static void udp_set_dev_scratch(struct sk_buff *skb) scratch->csum_unnecessary = !!skb_csum_unnecessary(skb); scratch->is_linear = !skb_is_nonlinear(skb); #endif - if (likely(!skb->_skb_refdst)) + /* all head states execept sp (dst, sk, nf) are always cleared by + * udp_rcv() and we need to preserve secpath, if present, to eventually + * process IP_CMSG_PASSSEC at recvmsg() time + */ + if (likely(!skb_sec_path(skb))) scratch->_tsize_state |= UDP_SKB_IS_STATELESS; } @@ -1782,13 +1786,6 @@ static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) sk_mark_napi_id_once(sk, skb); } - /* At recvmsg() time we may access skb->dst or skb->sp depending on - * the IP options and the cmsg flags, elsewhere can we clear all - * pending head states while they are hot in the cache - */ - if (likely(IPCB(skb)->opt.optlen == 0 && !skb_sec_path(skb))) - skb_release_head_state(skb); - rc = __udp_enqueue_schedule_skb(sk, skb); if (rc < 0) { int is_udplite = IS_UDPLITE(sk); |