From dcae74622c051b219ee628669a31716473efda2c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 12 Sep 2023 16:02:04 +0000 Subject: ipv6: lockless IPV6_RECVERR_RFC4884 implementation Move np->recverr_rfc4884 to an atomic flag to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/ipv6_sockglue.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) (limited to 'net/ipv6/ipv6_sockglue.c') diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index bbc8a009e05d..b65e73ac2ccd 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -462,6 +462,13 @@ int do_ipv6_setsockopt(struct sock *sk, int level, int optname, */ WRITE_ONCE(np->min_hopcount, val); return 0; + case IPV6_RECVERR_RFC4884: + if (optlen < sizeof(int)) + return -EINVAL; + if (val < 0 || val > 1) + return -EINVAL; + inet6_assign_bit(RECVERR6_RFC4884, sk, valbool); + return 0; } if (needs_rtnl) rtnl_lock(); @@ -974,14 +981,6 @@ done: np->rxopt.bits.recvfragsize = valbool; retv = 0; break; - case IPV6_RECVERR_RFC4884: - if (optlen < sizeof(int)) - goto e_inval; - if (val < 0 || val > 1) - goto e_inval; - np->recverr_rfc4884 = valbool; - retv = 0; - break; } unlock: @@ -1462,7 +1461,7 @@ int do_ipv6_getsockopt(struct sock *sk, int level, int optname, break; case IPV6_RECVERR_RFC4884: - val = np->recverr_rfc4884; + val = inet6_test_bit(RECVERR6_RFC4884, sk); break; default: -- cgit v1.2.3