linux-kernel - [PATCH net-next v2 1/8] mptcp: sched: remove mptcp_sched

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Message-Id: <20250413-net-next-mptcp-sched-mib-sft-misc-v2-1-0f83a4350150@kernel.org>
Date: Sun, 13 Apr 2025 11:34:32 +0200
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: mptcp@...ts.linux.dev, Mat Martineau <martineau@...nel.org>, 
 Geliang Tang <geliang@...nel.org>, "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
 Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
Subject: [PATCH net-next v2 1/8] mptcp: sched: remove mptcp_sched_data

This is a follow-up of commit b68b106b0f15 ("mptcp: sched: reduce size
for unused data"), now removing the mptcp_sched_data structure.

Now is a good time to do that, because the previously mentioned WIP work
has been updated, no longer depending on this structure.

Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
 include/net/mptcp.h | 13 ++-----------
 net/mptcp/sched.c   | 18 +++++++-----------
 2 files changed, 9 insertions(+), 22 deletions(-)

diff --git a/include/net/mptcp.h b/include/net/mptcp.h
index bfbad695951cf664af4d05390104883268b6bcd2..f7263fe2a2e40b507257c3720cc2d78d37357d6d 100644
--- a/include/net/mptcp.h
+++ b/include/net/mptcp.h
@@ -101,18 +101,9 @@ struct mptcp_out_options {
 #define MPTCP_SCHED_MAX		128
 #define MPTCP_SCHED_BUF_MAX	(MPTCP_SCHED_NAME_MAX * MPTCP_SCHED_MAX)
 
-#define MPTCP_SUBFLOWS_MAX	8
-
-struct mptcp_sched_data {
-	u8	subflows;
-	struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX];
-};
-
 struct mptcp_sched_ops {
-	int (*get_send)(struct mptcp_sock *msk,
-			struct mptcp_sched_data *data);
-	int (*get_retrans)(struct mptcp_sock *msk,
-			   struct mptcp_sched_data *data);
+	int (*get_send)(struct mptcp_sock *msk);
+	int (*get_retrans)(struct mptcp_sock *msk);
 
 	char			name[MPTCP_SCHED_NAME_MAX];
 	struct module		*owner;
diff --git a/net/mptcp/sched.c b/net/mptcp/sched.c
index c16c6fbd4ba2f89a2fffcfd6b1916098d7a18cbe..f09f7eb1d63f86b9899c72b5c2fd36c8445898a8 100644
--- a/net/mptcp/sched.c
+++ b/net/mptcp/sched.c
@@ -16,8 +16,7 @@
 static DEFINE_SPINLOCK(mptcp_sched_list_lock);
 static LIST_HEAD(mptcp_sched_list);
 
-static int mptcp_sched_default_get_send(struct mptcp_sock *msk,
-					struct mptcp_sched_data *data)
+static int mptcp_sched_default_get_send(struct mptcp_sock *msk)
 {
 	struct sock *ssk;
 
@@ -29,8 +28,7 @@ static int mptcp_sched_default_get_send(struct mptcp_sock *msk,
 	return 0;
 }
 
-static int mptcp_sched_default_get_retrans(struct mptcp_sock *msk,
-					   struct mptcp_sched_data *data)
+static int mptcp_sched_default_get_retrans(struct mptcp_sock *msk)
 {
 	struct sock *ssk;
 
@@ -157,7 +155,6 @@ void mptcp_subflow_set_scheduled(struct mptcp_subflow_context *subflow,
 int mptcp_sched_get_send(struct mptcp_sock *msk)
 {
 	struct mptcp_subflow_context *subflow;
-	struct mptcp_sched_data *data = NULL;
 
 	msk_owned_by_me(msk);
 
@@ -178,14 +175,13 @@ int mptcp_sched_get_send(struct mptcp_sock *msk)
 	}
 
 	if (msk->sched == &mptcp_sched_default || !msk->sched)
-		return mptcp_sched_default_get_send(msk, data);
-	return msk->sched->get_send(msk, data);
+		return mptcp_sched_default_get_send(msk);
+	return msk->sched->get_send(msk);
 }
 
 int mptcp_sched_get_retrans(struct mptcp_sock *msk)
 {
 	struct mptcp_subflow_context *subflow;
-	struct mptcp_sched_data *data = NULL;
 
 	msk_owned_by_me(msk);
 
@@ -199,8 +195,8 @@ int mptcp_sched_get_retrans(struct mptcp_sock *msk)
 	}
 
 	if (msk->sched == &mptcp_sched_default || !msk->sched)
-		return mptcp_sched_default_get_retrans(msk, data);
+		return mptcp_sched_default_get_retrans(msk);
 	if (msk->sched->get_retrans)
-		return msk->sched->get_retrans(msk, data);
-	return msk->sched->get_send(msk, data);
+		return msk->sched->get_retrans(msk);
+	return msk->sched->get_send(msk);
 }

-- 
2.48.1