From: Eric Dumazet <edumazet@google.com>
Date: Wed, 16 Aug 2023 08:15:43 +0000 (+0000)
Subject: inet: move inet->nodefrag to inet->inet_flags
X-Git-Tag: v6.6.7~2079^2~103^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f04b8d3478a3a63f17d8dc0dc6da16a828b48df0;p=platform%2Fkernel%2Flinux-starfive.git

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@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 38f7fc1..0e6e1b0 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 0f46b71..2fb9948 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -333,7 +333,7 @@ lookup_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 ada198f..39606ca 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 dac471e..ec946c1 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 a9ba7de..265b39b 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 cb83ca5..3230506 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;
 	}