netdev - [PATCH net-next 2/7] mptcp: using TOKEN_MAX

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Message-Id: <20210527235430.183465-3-mathew.j.martineau@linux.intel.com>
Date:   Thu, 27 May 2021 16:54:25 -0700
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     Jianguo Wu <wujianguo@...natelecom.cn>, davem@...emloft.net,
        kuba@...nel.org, matthieu.baerts@...sares.net,
        mptcp@...ts.linux.dev,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 2/7] mptcp: using TOKEN_MAX_RETRIES instead of magic number

From: Jianguo Wu <wujianguo@...natelecom.cn>

We have macro TOKEN_MAX_RETRIES for the number of token generate retries,
so using TOKEN_MAX_RETRIES in subflow_check_req().

And rename TOKEN_MAX_RETRIES to MPTCP_TOKEN_MAX_RETRIES as it is now
exposed.

Fixes: 535fb8152f31 ("mptcp: token: move retry to caller")
Reviewed-by: Matthieu Baerts <matthieu.baerts@...sares.net>
Signed-off-by: Jianguo Wu <wujianguo@...natelecom.cn>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
 net/mptcp/protocol.h | 2 ++
 net/mptcp/subflow.c  | 2 +-
 net/mptcp/token.c    | 3 +--
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 0c6f99c67345..89f6b73783d5 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -627,6 +627,8 @@ static inline void mptcp_write_space(struct sock *sk)
 
 void mptcp_destroy_common(struct mptcp_sock *msk);
 
+#define MPTCP_TOKEN_MAX_RETRIES	4
+
 void __init mptcp_token_init(void);
 static inline void mptcp_token_init_request(struct request_sock *req)
 {
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index bde6be77ea73..a50a97908866 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -162,7 +162,7 @@ static int subflow_check_req(struct request_sock *req,
 	}
 
 	if (mp_opt.mp_capable && listener->request_mptcp) {
-		int err, retries = 4;
+		int err, retries = MPTCP_TOKEN_MAX_RETRIES;
 
 		subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq;
 again:
diff --git a/net/mptcp/token.c b/net/mptcp/token.c
index 72a24e63b131..a98e554b034f 100644
--- a/net/mptcp/token.c
+++ b/net/mptcp/token.c
@@ -33,7 +33,6 @@
 #include <net/mptcp.h>
 #include "protocol.h"
 
-#define TOKEN_MAX_RETRIES	4
 #define TOKEN_MAX_CHAIN_LEN	4
 
 struct token_bucket {
@@ -153,7 +152,7 @@ int mptcp_token_new_connect(struct sock *sk)
 {
 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);
-	int retries = TOKEN_MAX_RETRIES;
+	int retries = MPTCP_TOKEN_MAX_RETRIES;
 	struct token_bucket *bucket;
 
 again:
-- 
2.31.1