[6.6.y,1/6] mptcp: define more local variables sk

Commit Message

Matthieu Baerts Nov. 18, 2024, 6:27 p.m. UTC

From: Geliang Tang <[e-mail]>

commit 14cb0e0bf39bd10429ba14e9e2f905f1144226fc upstream.

'(struct sock *)msk' is used several times in mptcp_nl_cmd_announce(),
mptcp_nl_cmd_remove() or mptcp_userspace_pm_set_flags() in pm_userspace.c,
it's worth adding a local variable sk to point it.

Reviewed-by: Matthieu Baerts <[e-mail]>
Signed-off-by: Geliang Tang <[e-mail]>
Signed-off-by: Mat Martineau <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>
Stable-dep-of: 06afe09091ee ("mptcp: add userspace_pm_lookup_addr_by_id helper")
Signed-off-by: Matthieu Baerts (NGI0) <[e-mail]>
---
 net/mptcp/pm_userspace.c | 31 ++++++++++++++++++++-----------
 1 file changed, 20 insertions(+), 11 deletions(-)

Patch

diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index e097b6a7b816..eded0f9c0b6f 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -183,6 +183,7 @@  int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
 	struct mptcp_pm_addr_entry addr_val;
 	struct mptcp_sock *msk;
 	int err = -EINVAL;
+	struct sock *sk;
 	u32 token_val;
 
 	if (!addr || !token) {
@@ -198,6 +199,8 @@  int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
 		return err;
 	}
 
+	sk = (struct sock *)msk;
+
 	if (!mptcp_pm_is_userspace(msk)) {
 		GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
 		goto announce_err;
@@ -221,7 +224,7 @@  int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
 		goto announce_err;
 	}
 
-	lock_sock((struct sock *)msk);
+	lock_sock(sk);
 	spin_lock_bh(&msk->pm.lock);
 
 	if (mptcp_pm_alloc_anno_list(msk, &addr_val.addr)) {
@@ -231,11 +234,11 @@  int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
 	}
 
 	spin_unlock_bh(&msk->pm.lock);
-	release_sock((struct sock *)msk);
+	release_sock(sk);
 
 	err = 0;
  announce_err:
-	sock_put((struct sock *)msk);
+	sock_put(sk);
 	return err;
 }
 
@@ -282,6 +285,7 @@  int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
 	struct mptcp_sock *msk;
 	LIST_HEAD(free_list);
 	int err = -EINVAL;
+	struct sock *sk;
 	u32 token_val;
 	u8 id_val;
 
@@ -299,6 +303,8 @@  int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
 		return err;
 	}
 
+	sk = (struct sock *)msk;
+
 	if (!mptcp_pm_is_userspace(msk)) {
 		GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
 		goto remove_err;
@@ -309,7 +315,7 @@  int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
 		goto remove_err;
 	}
 
-	lock_sock((struct sock *)msk);
+	lock_sock(sk);
 
 	list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
 		if (entry->addr.id == id_val) {
@@ -320,7 +326,7 @@  int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
 
 	if (!match) {
 		GENL_SET_ERR_MSG(info, "address with specified id not found");
-		release_sock((struct sock *)msk);
+		release_sock(sk);
 		goto remove_err;
 	}
 
@@ -328,15 +334,15 @@  int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
 
 	mptcp_pm_remove_addrs(msk, &free_list);
 
-	release_sock((struct sock *)msk);
+	release_sock(sk);
 
 	list_for_each_entry_safe(match, entry, &free_list, list) {
-		sock_kfree_s((struct sock *)msk, match, sizeof(*match));
+		sock_kfree_s(sk, match, sizeof(*match));
 	}
 
 	err = 0;
  remove_err:
-	sock_put((struct sock *)msk);
+	sock_put(sk);
 	return err;
 }
 
@@ -558,6 +564,7 @@  int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
 {
 	struct mptcp_sock *msk;
 	int ret = -EINVAL;
+	struct sock *sk;
 	u32 token_val;
 
 	token_val = nla_get_u32(token);
@@ -566,6 +573,8 @@  int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
 	if (!msk)
 		return ret;
 
+	sk = (struct sock *)msk;
+
 	if (!mptcp_pm_is_userspace(msk))
 		goto set_flags_err;
 
@@ -573,11 +582,11 @@  int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
 	    rem->addr.family == AF_UNSPEC)
 		goto set_flags_err;
 
-	lock_sock((struct sock *)msk);
+	lock_sock(sk);
 	ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc->addr, &rem->addr, bkup);
-	release_sock((struct sock *)msk);
+	release_sock(sk);
 
 set_flags_err:
-	sock_put((struct sock *)msk);
+	sock_put(sk);
 	return ret;
 }