diff mbox series

[net-next,v10,10/10] tcp: make dropreason in tcp_child_process() work

Message ID 20240226032227.15255-11-kerneljasonxing@gmail.com (mailing list archive)
State Accepted
Commit ee01defe25bad09a37b68dd051a7e931d1e4cd91
Delegated to: Netdev Maintainers
Headers show
Series introduce drop reasons for tcp receive path | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 961 this patch: 961
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 958 this patch: 958
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 978 this patch: 978
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 66 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-02-27--03-00 (tests: 1456)

Commit Message

Jason Xing Feb. 26, 2024, 3:22 a.m. UTC 
From: Jason Xing <kernelxing@tencent.com>

It's time to let it work right now. We've already prepared for this:)

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
--
v9
Link: https://lore.kernel.org/netdev/c5640fc4-16dc-4058-97c6-bd84bae4fda1@kernel.org/
Link: https://lore.kernel.org/netdev/CANn89iKE2vYz_6sYd=u3HbqdgiU0BWhdMY9-ivs0Rcht+X+Rfg@mail.gmail.com/
1. add reviewed-by tag (David)
2. add reviewed-by tag (Eric)

v8
Link: https://lore.kernel.org/netdev/CANn89i+huvL_Zidru_sNHbjwgM7==-q49+mgJq7vZPRgH6DgKg@mail.gmail.com/
Link: https://lore.kernel.org/netdev/CANn89iKmaZZSnk5+CCtSH43jeUgRWNQPV4cjc0vpWNT7nHnQQg@mail.gmail.com/
1. squash v7 patch [11/11] into the current patch.
2. refine the rcv codes. (Eric)

v7
Link: https://lore.kernel.org/all/20240219043815.98410-1-kuniyu@amazon.com/
1. adjust the related part of code only since patch [04/11] is changed.
---
 net/ipv4/tcp_ipv4.c | 12 +++++++-----
 net/ipv6/tcp_ipv6.c | 16 ++++++++++------
 2 files changed, 17 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index c79e25549972..a22ee5838751 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1907,7 +1907,6 @@  int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 		return 0;
 	}
 
-	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (tcp_checksum_complete(skb))
 		goto csum_err;
 
@@ -1917,7 +1916,8 @@  int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 		if (!nsk)
 			return 0;
 		if (nsk != sk) {
-			if (tcp_child_process(sk, nsk, skb)) {
+			reason = tcp_child_process(sk, nsk, skb);
+			if (reason) {
 				rsk = nsk;
 				goto reset;
 			}
@@ -2276,10 +2276,12 @@  int tcp_v4_rcv(struct sk_buff *skb)
 		if (nsk == sk) {
 			reqsk_put(req);
 			tcp_v4_restore_cb(skb);
-		} else if (tcp_child_process(sk, nsk, skb)) {
-			tcp_v4_send_reset(nsk, skb);
-			goto discard_and_relse;
 		} else {
+			drop_reason = tcp_child_process(sk, nsk, skb);
+			if (drop_reason) {
+				tcp_v4_send_reset(nsk, skb);
+				goto discard_and_relse;
+			}
 			sock_put(sk);
 			return 0;
 		}
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 4f8464e04b7f..f677f0fa5196 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1623,7 +1623,6 @@  int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 	if (np->rxopt.all)
 		opt_skb = skb_clone_and_charge_r(skb, sk);
 
-	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */
 		struct dst_entry *dst;
 
@@ -1654,8 +1653,11 @@  int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 		struct sock *nsk = tcp_v6_cookie_check(sk, skb);
 
 		if (nsk != sk) {
-			if (nsk && tcp_child_process(sk, nsk, skb))
-				goto reset;
+			if (nsk) {
+				reason = tcp_child_process(sk, nsk, skb);
+				if (reason)
+					goto reset;
+			}
 			if (opt_skb)
 				__kfree_skb(opt_skb);
 			return 0;
@@ -1854,10 +1856,12 @@  INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb)
 		if (nsk == sk) {
 			reqsk_put(req);
 			tcp_v6_restore_cb(skb);
-		} else if (tcp_child_process(sk, nsk, skb)) {
-			tcp_v6_send_reset(nsk, skb);
-			goto discard_and_relse;
 		} else {
+			drop_reason = tcp_child_process(sk, nsk, skb);
+			if (drop_reason) {
+				tcp_v6_send_reset(nsk, skb);
+				goto discard_and_relse;
+			}
 			sock_put(sk);
 			return 0;
 		}