FAILED: patch "[PATCH] mptcp: fix error mibs accounting" failed to apply to 5.15-stable tree

PATCH [email protected] 1 participant 1 message Jul 4, 2022

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2022-07-04 11:59 UTC #0 lore raw

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0c1f78a49af721490a5ad70b73e8b4d382465dae Mon Sep 17 00:00:00 2001
From: Paolo Abeni <[email protected]>
Date: Mon, 27 Jun 2022 18:02:35 -0700
Subject: [PATCH] mptcp: fix error mibs accounting

The current accounting for MP_FAIL and FASTCLOSE is not very
accurate: both can be increased even when the related option is not really sent. Move the accounting into the correct place.

Fixes eb7f33654dc1 ("mptcp: add the mibs for MP_FAIL")

Fixes 1e75629cb964 ("mptcp: add the mibs for MP_FASTCLOSE")

Signed-off-by Paolo Abeni <[email protected]>

Signed-off-by Mat Martineau <[email protected]>

Signed-off-by Jakub Kicinski <[email protected]>

net/mptcp/options.c +3 -2

index be3b918a6d15..2a6351d55a7d 100644
@@ -765,6 +765,7 @@ static noinline bool mptcp_established_options_rst(struct sock *sk, struct sk_bu
 	opts->suboptions |= OPTION_MPTCP_RST;
 	opts->reset_transient = subflow->reset_transient;
 	opts->reset_reason = subflow->reset_reason;
+	MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPRSTTX);
 
 	return true;
 }

@@ -788,6 +789,7 @@ static bool mptcp_established_options_fastclose(struct sock *sk,
 	opts->rcvr_key = msk->remote_key;
 
 	pr_debug("FASTCLOSE key=%llu", opts->rcvr_key);
+	MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFASTCLOSETX);
 	return true;
 }

@@ -809,6 +811,7 @@ static bool mptcp_established_options_mp_fail(struct sock *sk,
 	opts->fail_seq = subflow->map_seq;
 
 	pr_debug("MP_FAIL fail_seq=%llu", opts->fail_seq);
+	MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILTX);
 
 	return true;
 }

@@ -833,13 +836,11 @@ bool mptcp_established_options(struct sock *sk, struct sk_buff *skb,
 		    mptcp_established_options_mp_fail(sk, &opt_size, remaining, opts)) {
 			*size += opt_size;
 			remaining -= opt_size;
-			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFASTCLOSETX);
 		}
 		/* MP_RST can be used with MP_FASTCLOSE and MP_FAIL if there is room */
 		if (mptcp_established_options_rst(sk, skb, &opt_size, remaining, opts)) {
 			*size += opt_size;
 			remaining -= opt_size;
-			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPRSTTX);
 		}
 		return true;
 	}

net/mptcp/pm.c +0 -1

index 59a85220edc9..91a62b598de4 100644
@@ -310,7 +310,6 @@ void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq)
 		pr_debug("send MP_FAIL response and infinite map");
 
 		subflow->send_mp_fail = 1;
-		MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILTX);
 		subflow->send_infinite_map = 1;
 	} else if (!sock_flag(sk, SOCK_DEAD)) {
 		pr_debug("MP_FAIL response received");

net/mptcp/subflow.c +1 -3

index 8841e8cd9ad8..50ad19adc003 100644
@@ -958,10 +958,8 @@ static enum mapping_status validate_data_csum(struct sock *ssk, struct sk_buff *
 				 subflow->map_data_csum);
 	if (unlikely(csum)) {
 		MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_DATACSUMERR);
-		if (subflow->mp_join || subflow->valid_csum_seen) {
+		if (subflow->mp_join || subflow->valid_csum_seen)
 			subflow->send_mp_fail = 1;
-			MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_MPFAILTX);
-		}
 		return subflow->mp_join ? MAPPING_INVALID : MAPPING_DUMMY;
 	}