diff options
author | Eric Dumazet <edumazet@google.com> | 2024-04-07 12:33:21 +0300 |
---|---|---|
committer | Paolo Abeni <pabeni@redhat.com> | 2024-04-09 12:47:40 +0300 |
commit | b9e810405880c99baafd550ada7043e86465396e (patch) | |
tree | 566cd8d08635f68c3445deb14a04d51e66a1e9cd /net | |
parent | 1c25fe9a044d5334153a3585754b26553f8287b9 (diff) | |
download | linux-b9e810405880c99baafd550ada7043e86465396e.tar.xz |
tcp: propagate tcp_tw_isn via an extra parameter to ->route_req()
tcp_v6_init_req() reads TCP_SKB_CB(skb)->tcp_tw_isn to find
out if the request socket is created by a SYN hitting a TIMEWAIT socket.
This has been buggy for a decade, lets directly pass the information
from tcp_conn_request().
This is a preparatory patch to make the following one easier to review.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv4/tcp_input.c | 2 | ||||
-rw-r--r-- | net/ipv4/tcp_ipv4.c | 3 | ||||
-rw-r--r-- | net/ipv6/tcp_ipv6.c | 10 | ||||
-rw-r--r-- | net/mptcp/subflow.c | 10 |
4 files changed, 15 insertions, 10 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 1f28a2561795..48c275e6ef02 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -7160,7 +7160,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops, /* Note: tcp_v6_init_req() might override ir_iif for link locals */ inet_rsk(req)->ir_iif = inet_request_bound_dev_if(sk, skb); - dst = af_ops->route_req(sk, skb, &fl, req); + dst = af_ops->route_req(sk, skb, &fl, req, isn); if (!dst) goto drop_and_free; diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 52963c3bb8ca..81e2f05c244d 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1666,7 +1666,8 @@ static void tcp_v4_init_req(struct request_sock *req, static struct dst_entry *tcp_v4_route_req(const struct sock *sk, struct sk_buff *skb, struct flowi *fl, - struct request_sock *req) + struct request_sock *req, + u32 tw_isn) { tcp_v4_init_req(req, sk, skb); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index cffebaec66f1..5141f7033abd 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -793,7 +793,8 @@ clear_hash_nostart: static void tcp_v6_init_req(struct request_sock *req, const struct sock *sk_listener, - struct sk_buff *skb) + struct sk_buff *skb, + u32 tw_isn) { bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags); struct inet_request_sock *ireq = inet_rsk(req); @@ -807,7 +808,7 @@ static void tcp_v6_init_req(struct request_sock *req, ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL) ireq->ir_iif = tcp_v6_iif(skb); - if (!TCP_SKB_CB(skb)->tcp_tw_isn && + if (!tw_isn && (ipv6_opt_accepted(sk_listener, skb, &TCP_SKB_CB(skb)->header.h6) || np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo || np->rxopt.bits.rxhlim || @@ -820,9 +821,10 @@ static void tcp_v6_init_req(struct request_sock *req, static struct dst_entry *tcp_v6_route_req(const struct sock *sk, struct sk_buff *skb, struct flowi *fl, - struct request_sock *req) + struct request_sock *req, + u32 tw_isn) { - tcp_v6_init_req(req, sk, skb); + tcp_v6_init_req(req, sk, skb, tw_isn); if (security_inet_conn_request(sk, skb, req)) return NULL; diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 162b218d9858..b94d1dca1094 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -289,7 +289,8 @@ EXPORT_SYMBOL_GPL(mptcp_subflow_init_cookie_req); static struct dst_entry *subflow_v4_route_req(const struct sock *sk, struct sk_buff *skb, struct flowi *fl, - struct request_sock *req) + struct request_sock *req, + u32 tw_isn) { struct dst_entry *dst; int err; @@ -297,7 +298,7 @@ static struct dst_entry *subflow_v4_route_req(const struct sock *sk, tcp_rsk(req)->is_mptcp = 1; subflow_init_req(req, sk); - dst = tcp_request_sock_ipv4_ops.route_req(sk, skb, fl, req); + dst = tcp_request_sock_ipv4_ops.route_req(sk, skb, fl, req, tw_isn); if (!dst) return NULL; @@ -356,7 +357,8 @@ static int subflow_v6_send_synack(const struct sock *sk, struct dst_entry *dst, static struct dst_entry *subflow_v6_route_req(const struct sock *sk, struct sk_buff *skb, struct flowi *fl, - struct request_sock *req) + struct request_sock *req, + u32 tw_isn) { struct dst_entry *dst; int err; @@ -364,7 +366,7 @@ static struct dst_entry *subflow_v6_route_req(const struct sock *sk, tcp_rsk(req)->is_mptcp = 1; subflow_init_req(req, sk); - dst = tcp_request_sock_ipv6_ops.route_req(sk, skb, fl, req); + dst = tcp_request_sock_ipv6_ops.route_req(sk, skb, fl, req, tw_isn); if (!dst) return NULL; |