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Message-ID: <20230810103927.1705940-8-edumazet@google.com>
Date: Thu, 10 Aug 2023 10:39:19 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <simon.horman@...igine.com>, Soheil Hassas Yeganeh <soheil@...gle.com>, netdev@...r.kernel.org,
eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 07/15] inet: move inet->mc_loop to inet->inet_frags
IP_MULTICAST_LOOP socket option can now be set/read
without locking the socket.
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
include/net/inet_sock.h | 2 +-
net/core/sock.c | 2 +-
net/ipv4/af_inet.c | 2 +-
net/ipv4/inet_diag.c | 2 +-
net/ipv4/ip_sockglue.c | 16 ++++++++--------
net/ipv4/udp_tunnel_core.c | 2 +-
net/ipv6/af_inet6.c | 2 +-
net/sctp/socket.c | 2 +-
8 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index ad1895e32e7d9bbad4ce210bda9698328e026b18..6c4eeca59f608ff18e5f05dec33700189d6e2198 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -231,7 +231,6 @@ struct inet_sock {
__u8 mc_ttl;
__u8 pmtudisc;
__u8 is_icsk:1,
- mc_loop:1,
transparent:1,
mc_all:1,
nodefrag:1;
@@ -271,6 +270,7 @@ enum {
INET_FLAGS_RECVERR_RFC4884 = 10,
INET_FLAGS_FREEBIND = 11,
INET_FLAGS_HDRINCL = 12,
+ INET_FLAGS_MC_LOOP = 13,
};
/* cmsg flags for inet */
diff --git a/net/core/sock.c b/net/core/sock.c
index 51f7d94eccf7c78d25f8acf9a24ce0828b4f56f4..b0862a54c1e6a9263bcaf775fd38a88f45124c55 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -767,7 +767,7 @@ bool sk_mc_loop(struct sock *sk)
return true;
switch (sk->sk_family) {
case AF_INET:
- return inet_sk(sk)->mc_loop;
+ return inet_test_bit(MC_LOOP, sk);
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
return inet6_sk(sk)->mc_loop;
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index a42ae7a6a7aa17cf15faf4a9674241bc38e59e42..80e2a3c897a540c76b979355957b81a024bd8259 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -350,7 +350,7 @@ static int inet_create(struct net *net, struct socket *sock, int protocol,
sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
inet->uc_ttl = -1;
- inet->mc_loop = 1;
+ inet_set_bit(MC_LOOP, sk);
inet->mc_ttl = 1;
inet->mc_all = 1;
inet->mc_index = 0;
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 98f3eb0ce16ab32daccf3c2407630622e9cdb71d..cc797261893b902f626b5a36074e4b4bf7535063 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -186,7 +186,7 @@ int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
inet_sockopt.is_icsk = inet->is_icsk;
inet_sockopt.freebind = inet_test_bit(FREEBIND, sk);
inet_sockopt.hdrincl = inet_test_bit(HDRINCL, sk);
- inet_sockopt.mc_loop = inet->mc_loop;
+ inet_sockopt.mc_loop = inet_test_bit(MC_LOOP, sk);
inet_sockopt.transparent = inet->transparent;
inet_sockopt.mc_all = inet->mc_all;
inet_sockopt.nodefrag = inet->nodefrag;
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 763456fd4f4faac8e46d649a281f178be05a7cef..be569032b612bef1277e802400a1ee6ec20e877a 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -993,6 +993,11 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
return -ENOPROTOOPT;
inet_assign_bit(HDRINCL, sk, val);
return 0;
+ case IP_MULTICAST_LOOP:
+ if (optlen < 1)
+ return -EINVAL;
+ inet_assign_bit(MC_LOOP, sk, val);
+ return 0;
}
err = 0;
@@ -1083,11 +1088,6 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
goto e_inval;
inet->mc_ttl = val;
break;
- case IP_MULTICAST_LOOP:
- if (optlen < 1)
- goto e_inval;
- inet->mc_loop = !!val;
- break;
case IP_UNICAST_IF:
{
struct net_device *dev = NULL;
@@ -1579,6 +1579,9 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_HDRINCL:
val = inet_test_bit(HDRINCL, sk);
goto copyval;
+ case IP_MULTICAST_LOOP:
+ val = inet_test_bit(MC_LOOP, sk);
+ goto copyval;
}
if (needs_rtnl)
@@ -1653,9 +1656,6 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_MULTICAST_TTL:
val = inet->mc_ttl;
break;
- case IP_MULTICAST_LOOP:
- val = inet->mc_loop;
- break;
case IP_UNICAST_IF:
val = (__force int)htonl((__u32) inet->uc_index);
break;
diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c
index 5f8104cf082d0e25a204f1d7ae5c27d9961914ea..9b18f371af0d49bd3ee9a440f222d03efd8a4911 100644
--- a/net/ipv4/udp_tunnel_core.c
+++ b/net/ipv4/udp_tunnel_core.c
@@ -63,7 +63,7 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
struct sock *sk = sock->sk;
/* Disable multicast loopback */
- inet_sk(sk)->mc_loop = 0;
+ inet_clear_bit(MC_LOOP, sk);
/* Enable CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE conversion */
inet_inc_convert_csum(sk);
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 138270e59ea6e2f30fcd75440609f92306bd4975..4a34a4ba62b229991307ebed74ac7cd9f3a943ba 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -229,7 +229,7 @@ static int inet6_create(struct net *net, struct socket *sock, int protocol,
*/
inet->uc_ttl = -1;
- inet->mc_loop = 1;
+ inet_set_bit(MC_LOOP, sk);
inet->mc_ttl = 1;
inet->mc_index = 0;
RCU_INIT_POINTER(inet->mc_list, NULL);
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 6e3d28aa587cdb64f7a1ac384fa28a34d4c6739c..04b390892827b8abbb7e7433d71f4f54dd1dac21 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -9482,7 +9482,7 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
newinet->inet_id = get_random_u16();
newinet->uc_ttl = inet->uc_ttl;
- newinet->mc_loop = 1;
+ inet_set_bit(MC_LOOP, newsk);
newinet->mc_ttl = 1;
newinet->mc_index = 0;
newinet->mc_list = NULL;
--
2.41.0.640.ga95def55d0-goog
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