summaryrefslogtreecommitdiff
path: root/net/netfilter/ipvs
diff options
context:
space:
mode:
authorEric Dumazet <edumazet@google.com>2023-09-22 06:42:15 +0300
committerDavid S. Miller <davem@davemloft.net>2023-10-01 21:39:18 +0300
commitceaa714138a372ac63cc2c5c19ee0882d22827f9 (patch)
tree73b347539e9039e35d9ef9566cf38ec5e6cfb214 /net/netfilter/ipvs
parentc9746e6a19c24b2d9a74d6657daee3b39fdc1bec (diff)
downloadlinux-ceaa714138a372ac63cc2c5c19ee0882d22827f9.tar.xz
inet: implement lockless IP_MTU_DISCOVER
inet->pmtudisc can be read locklessly. Implement proper lockless reads and writes to inet->pmtudisc ip_sock_set_mtu_discover() can now be called from arbitrary contexts. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/ipvs')
-rw-r--r--net/netfilter/ipvs/ip_vs_sync.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 3eed16702248..4f6c795588fb 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -1335,7 +1335,7 @@ static void set_mcast_pmtudisc(struct sock *sk, int val)
/* setsockopt(sock, SOL_IP, IP_MTU_DISCOVER, &val, sizeof(val)); */
lock_sock(sk);
- inet->pmtudisc = val;
+ WRITE_ONCE(inet->pmtudisc, val);
#ifdef CONFIG_IP_VS_IPV6
if (sk->sk_family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);