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authorEric Dumazet <edumazet@google.com>2023-09-22 06:42:14 +0300
committerDavid S. Miller <davem@davemloft.net>2023-10-01 21:39:18 +0300
commitc9746e6a19c24b2d9a74d6657daee3b39fdc1bec (patch)
tree0c4c1653ac642f05004c576ce39640e3cc055011 /net/netfilter/ipvs
parent2be825ebb9d1b17f1a9e46af78d24b76c4ff7a1f (diff)
downloadlinux-c9746e6a19c24b2d9a74d6657daee3b39fdc1bec.tar.xz
inet: implement lockless IP_MULTICAST_TTL
inet->mc_ttl can be read locklessly. Implement proper lockless reads and writes to inet->mc_ttl 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 5820a8156c47..3eed16702248 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -1316,7 +1316,7 @@ static void set_mcast_ttl(struct sock *sk, u_char ttl)
/* setsockopt(sock, SOL_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)); */
lock_sock(sk);
- inet->mc_ttl = ttl;
+ WRITE_ONCE(inet->mc_ttl, ttl);
#ifdef CONFIG_IP_VS_IPV6
if (sk->sk_family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);