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Message-ID: <20230810103927.1705940-12-edumazet@google.com>
Date: Thu, 10 Aug 2023 10:39:23 +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 11/15] inet: move inet->nodefrag to inet->inet_flags
IP_NODEFRAG 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/ipv4/af_inet.c | 2 +-
net/ipv4/inet_diag.c | 2 +-
net/ipv4/ip_sockglue.c | 18 ++++++++----------
net/ipv4/netfilter/nf_defrag_ipv4.c | 2 +-
net/netfilter/ipvs/ip_vs_core.c | 4 ++--
6 files changed, 14 insertions(+), 16 deletions(-)
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 38f7fc1c4dacfb4ecacbbb38ae484ed06f2638e2..0e6e1b017efb1f738be1682448675ecece43c1f7 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -229,7 +229,6 @@ struct inet_sock {
__u8 min_ttl;
__u8 mc_ttl;
__u8 pmtudisc;
- __u8 nodefrag:1;
__u8 bind_address_no_port:1,
defer_connect:1; /* Indicates that fastopen_connect is set
* and cookie exists so we defer connect
@@ -270,6 +269,7 @@ enum {
INET_FLAGS_MC_ALL = 14,
INET_FLAGS_TRANSPARENT = 15,
INET_FLAGS_IS_ICSK = 16,
+ INET_FLAGS_NODEFRAG = 17,
};
/* cmsg flags for inet */
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 7655574b2de152fad70b258e779fcdadfb283f32..f684310c8f24ca08170f39ec955d20209566d7c5 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -327,7 +327,7 @@ static int inet_create(struct net *net, struct socket *sock, int protocol,
inet = inet_sk(sk);
inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags);
- inet->nodefrag = 0;
+ inet_clear_bit(NODEFRAG, sk);
if (SOCK_RAW == sock->type) {
inet->inet_num = protocol;
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index ada198fc1a92bfbaa1abe691da24489edf281f22..39606caad484a99a78beae399e38e56584f23f28 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -189,7 +189,7 @@ int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
inet_sockopt.mc_loop = inet_test_bit(MC_LOOP, sk);
inet_sockopt.transparent = inet_test_bit(TRANSPARENT, sk);
inet_sockopt.mc_all = inet_test_bit(MC_ALL, sk);
- inet_sockopt.nodefrag = inet->nodefrag;
+ inet_sockopt.nodefrag = inet_test_bit(NODEFRAG, sk);
inet_sockopt.bind_address_no_port = inet->bind_address_no_port;
inet_sockopt.recverr_rfc4884 = inet_test_bit(RECVERR_RFC4884, sk);
inet_sockopt.defer_connect = inet->defer_connect;
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index dac471ed067b4ba276fc0a9379750df54ea8987c..ec946c13ea206dde3c5634d6dcd07aab7090cad8 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -1015,6 +1015,11 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
goto e_inval;
inet_assign_bit(TRANSPARENT, sk, val);
return 0;
+ case IP_NODEFRAG:
+ if (sk->sk_type != SOCK_RAW)
+ return -ENOPROTOOPT;
+ inet_assign_bit(NODEFRAG, sk, val);
+ return 0;
}
err = 0;
@@ -1079,13 +1084,6 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
goto e_inval;
inet->uc_ttl = val;
break;
- case IP_NODEFRAG:
- if (sk->sk_type != SOCK_RAW) {
- err = -ENOPROTOOPT;
- break;
- }
- inet->nodefrag = val ? 1 : 0;
- break;
case IP_BIND_ADDRESS_NO_PORT:
inet->bind_address_no_port = val ? 1 : 0;
break;
@@ -1586,6 +1584,9 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_TRANSPARENT:
val = inet_test_bit(TRANSPARENT, sk);
goto copyval;
+ case IP_NODEFRAG:
+ val = inet_test_bit(NODEFRAG, sk);
+ goto copyval;
}
if (needs_rtnl)
@@ -1633,9 +1634,6 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
inet->uc_ttl);
break;
}
- case IP_NODEFRAG:
- val = inet->nodefrag;
- break;
case IP_BIND_ADDRESS_NO_PORT:
val = inet->bind_address_no_port;
break;
diff --git a/net/ipv4/netfilter/nf_defrag_ipv4.c b/net/ipv4/netfilter/nf_defrag_ipv4.c
index a9ba7de092c42895e01d808beeab18affe196abc..265b39bc435b4c7f356a7e92705e43353adb426a 100644
--- a/net/ipv4/netfilter/nf_defrag_ipv4.c
+++ b/net/ipv4/netfilter/nf_defrag_ipv4.c
@@ -66,7 +66,7 @@ static unsigned int ipv4_conntrack_defrag(void *priv,
struct sock *sk = skb->sk;
if (sk && sk_fullsock(sk) && (sk->sk_family == PF_INET) &&
- inet_sk(sk)->nodefrag)
+ inet_test_bit(NODEFRAG, sk))
return NF_ACCEPT;
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index cb83ca506c5c9de43012b1e66b9a4619ffda7de4..3230506ae3ffd8c120f0c96b07d78a7b58a4aaac 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -1346,7 +1346,7 @@ ip_vs_out_hook(void *priv, struct sk_buff *skb, const struct nf_hook_state *stat
if (unlikely(sk && hooknum == NF_INET_LOCAL_OUT &&
af == AF_INET)) {
- if (sk->sk_family == PF_INET && inet_sk(sk)->nodefrag)
+ if (sk->sk_family == PF_INET && inet_test_bit(NODEFRAG, sk))
return NF_ACCEPT;
}
@@ -1946,7 +1946,7 @@ ip_vs_in_hook(void *priv, struct sk_buff *skb, const struct nf_hook_state *state
if (unlikely(sk && hooknum == NF_INET_LOCAL_OUT &&
af == AF_INET)) {
- if (sk->sk_family == PF_INET && inet_sk(sk)->nodefrag)
+ if (sk->sk_family == PF_INET && inet_test_bit(NODEFRAG, sk))
return NF_ACCEPT;
}
--
2.41.0.640.ga95def55d0-goog
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