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Message-Id: <20250117-net-next-mptcp-pm-misc-cleanup-2-v2-11-61d4fe0586e8@kernel.org>
Date: Fri, 17 Jan 2025 19:41:43 +0100
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>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>, 
 Geliang Tang <geliang@...nel.org>
Subject: [PATCH net-next v2 11/15] mptcp: pm: add id parameter for get_addr

From: Geliang Tang <tanggeliang@...inos.cn>

The address id is parsed both in mptcp_pm_nl_get_addr() and
mptcp_userspace_pm_get_addr(), this makes the code somewhat repetitive.

So this patch adds a new parameter 'id' for all get_addr() interfaces.
The address id is only parsed in mptcp_pm_nl_get_addr_doit(), then pass
it to both mptcp_pm_nl_get_addr() and mptcp_userspace_pm_get_addr().

Signed-off-by: Geliang Tang <tanggeliang@...inos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
v2:
- Fix 'attr' no longer being set in mptcp_pm_nl_get_addr(), but still
  used in this patch (no longer in the next one). (Simon)
---
 net/mptcp/pm.c           | 20 ++++++++++++++++----
 net/mptcp/pm_netlink.c   | 16 ++++------------
 net/mptcp/pm_userspace.c | 14 +++-----------
 net/mptcp/protocol.h     |  4 ++--
 4 files changed, 25 insertions(+), 29 deletions(-)

diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 526e5bca1fa1bb67acb8532ad8b8b819d2f5151c..caf5bfc3cd1ddeb22799c28dec3d19b30467b169 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -434,16 +434,28 @@ bool mptcp_pm_is_backup(struct mptcp_sock *msk, struct sock_common *skc)
 	return mptcp_pm_nl_is_backup(msk, &skc_local);
 }
 
-static int mptcp_pm_get_addr(struct genl_info *info)
+static int mptcp_pm_get_addr(u8 id, struct genl_info *info)
 {
 	if (info->attrs[MPTCP_PM_ATTR_TOKEN])
-		return mptcp_userspace_pm_get_addr(info);
-	return mptcp_pm_nl_get_addr(info);
+		return mptcp_userspace_pm_get_addr(id, info);
+	return mptcp_pm_nl_get_addr(id, info);
 }
 
 int mptcp_pm_nl_get_addr_doit(struct sk_buff *skb, struct genl_info *info)
 {
-	return mptcp_pm_get_addr(info);
+	struct mptcp_pm_addr_entry addr;
+	struct nlattr *attr;
+	int ret;
+
+	if (GENL_REQ_ATTR_CHECK(info, MPTCP_PM_ENDPOINT_ADDR))
+		return -EINVAL;
+
+	attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR];
+	ret = mptcp_pm_parse_entry(attr, info, false, &addr);
+	if (ret < 0)
+		return ret;
+
+	return mptcp_pm_get_addr(addr.addr.id, info);
 }
 
 static int mptcp_pm_dump_addr(struct sk_buff *msg, struct netlink_callback *cb)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 853b1ea8680ae753fcb882d8b8f4486519798503..f7da750ab94f7bbffafb258cb0d6ff01ad59c0b0 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -1773,23 +1773,15 @@ int mptcp_nl_fill_addr(struct sk_buff *skb,
 	return -EMSGSIZE;
 }
 
-int mptcp_pm_nl_get_addr(struct genl_info *info)
+int mptcp_pm_nl_get_addr(u8 id, struct genl_info *info)
 {
+	struct nlattr *attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR];
 	struct pm_nl_pernet *pernet = genl_info_pm_nl(info);
-	struct mptcp_pm_addr_entry addr, *entry;
+	struct mptcp_pm_addr_entry *entry;
 	struct sk_buff *msg;
-	struct nlattr *attr;
 	void *reply;
 	int ret;
 
-	if (GENL_REQ_ATTR_CHECK(info, MPTCP_PM_ENDPOINT_ADDR))
-		return -EINVAL;
-
-	attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR];
-	ret = mptcp_pm_parse_entry(attr, info, false, &addr);
-	if (ret < 0)
-		return ret;
-
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (!msg)
 		return -ENOMEM;
@@ -1803,7 +1795,7 @@ int mptcp_pm_nl_get_addr(struct genl_info *info)
 	}
 
 	rcu_read_lock();
-	entry = __lookup_addr_by_id(pernet, addr.addr.id);
+	entry = __lookup_addr_by_id(pernet, id);
 	if (!entry) {
 		NL_SET_ERR_MSG_ATTR(info->extack, attr, "address not found");
 		ret = -EINVAL;
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 1246063598c8152eb908586dc2e3bcacaaba0a91..79e2d12e088805ff3f59ecf41f5092df9823c1b4 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -684,9 +684,9 @@ int mptcp_userspace_pm_dump_addr(struct sk_buff *msg,
 	return ret;
 }
 
-int mptcp_userspace_pm_get_addr(struct genl_info *info)
+int mptcp_userspace_pm_get_addr(u8 id, struct genl_info *info)
 {
-	struct mptcp_pm_addr_entry addr, *entry;
+	struct mptcp_pm_addr_entry *entry;
 	struct mptcp_sock *msk;
 	struct sk_buff *msg;
 	struct nlattr *attr;
@@ -694,20 +694,12 @@ int mptcp_userspace_pm_get_addr(struct genl_info *info)
 	struct sock *sk;
 	void *reply;
 
-	if (GENL_REQ_ATTR_CHECK(info, MPTCP_PM_ENDPOINT_ADDR))
-		return ret;
-
 	msk = mptcp_userspace_pm_get_sock(info);
 	if (!msk)
 		return ret;
 
 	sk = (struct sock *)msk;
 
-	attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR];
-	ret = mptcp_pm_parse_entry(attr, info, false, &addr);
-	if (ret < 0)
-		goto out;
-
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (!msg) {
 		ret = -ENOMEM;
@@ -724,7 +716,7 @@ int mptcp_userspace_pm_get_addr(struct genl_info *info)
 
 	lock_sock(sk);
 	spin_lock_bh(&msk->pm.lock);
-	entry = mptcp_userspace_pm_lookup_addr_by_id(msk, addr.addr.id);
+	entry = mptcp_userspace_pm_lookup_addr_by_id(msk, id);
 	if (!entry) {
 		NL_SET_ERR_MSG_ATTR(info->extack, attr, "address not found");
 		ret = -EINVAL;
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 7fe91a2e170dd40a830c4301960b484017fd11d2..e77920c932442ce1d317fcda8d2561e11d0c2a12 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -1132,8 +1132,8 @@ int mptcp_pm_nl_dump_addr(struct sk_buff *msg,
 			  struct netlink_callback *cb);
 int mptcp_userspace_pm_dump_addr(struct sk_buff *msg,
 				 struct netlink_callback *cb);
-int mptcp_pm_nl_get_addr(struct genl_info *info);
-int mptcp_userspace_pm_get_addr(struct genl_info *info);
+int mptcp_pm_nl_get_addr(u8 id, struct genl_info *info);
+int mptcp_userspace_pm_get_addr(u8 id, struct genl_info *info);
 
 static inline u8 subflow_get_local_id(const struct mptcp_subflow_context *subflow)
 {

-- 
2.47.1

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