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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-07-28 03:43:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-08-01 00:12:00 -0700 |
| commit | d14730b8e9117c9b77aacd391c049b50163e9b61 (patch) | |
| tree | cfccf8574eb43722d2c1c6829d90305abe18c69f /net | |
| parent | cfdf76474e1d8a56ac6cfae39f8559cfe9dfd7fd (diff) | |
| download | linux-d14730b8e9117c9b77aacd391c049b50163e9b61.tar.bz2 | |
ipv6: use RCU in inet6_csk_xmit()
Use RCU to avoid changing dst_entry refcount in fast path.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/inet6_connection_sock.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c index 8a58e8cf6646..2916200f90c1 100644 --- a/net/ipv6/inet6_connection_sock.c +++ b/net/ipv6/inet6_connection_sock.c @@ -211,6 +211,7 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused) struct flowi6 fl6; struct dst_entry *dst; struct in6_addr *final_p, final; + int res; memset(&fl6, 0, sizeof(fl6)); fl6.flowi6_proto = sk->sk_protocol; @@ -241,12 +242,14 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused) __inet6_csk_dst_store(sk, dst, NULL, NULL); } - skb_dst_set(skb, dst_clone(dst)); + rcu_read_lock(); + skb_dst_set_noref(skb, dst); /* Restore final destination back after routing done */ ipv6_addr_copy(&fl6.daddr, &np->daddr); - return ip6_xmit(sk, skb, &fl6, np->opt); + res = ip6_xmit(sk, skb, &fl6, np->opt); + rcu_read_unlock(); + return res; } - EXPORT_SYMBOL_GPL(inet6_csk_xmit); |