Patch "mptcp: pm: remove mptcp_pm_remove_subflow()" has been added to the 6.1-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    mptcp: pm: remove mptcp_pm_remove_subflow()

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mptcp-pm-remove-mptcp_pm_remove_subflow.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b72fcbd3560ae7ba22c21f721bc98baa8053cd51
Author: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Date:   Mon Aug 19 21:45:25 2024 +0200

    mptcp: pm: remove mptcp_pm_remove_subflow()
    
    [ Upstream commit f448451aa62d54be16acb0034223c17e0d12bc69 ]
    
    This helper is confusing. It is in pm.c, but it is specific to the
    in-kernel PM and it cannot be used by the userspace one. Also, it simply
    calls one in-kernel specific function with the PM lock, while the
    similar mptcp_pm_remove_addr() helper requires the PM lock.
    
    What's left is the pr_debug(), which is not that useful, because a
    similar one is present in the only function called by this helper:
    
      mptcp_pm_nl_rm_subflow_received()
    
    After these modifications, this helper can be marked as 'static', and
    the lock can be taken only once in mptcp_pm_flush_addrs_and_subflows().
    
    Note that it is not a bug fix, but it will help backporting the
    following commits.
    
    Fixes: 0ee4261a3681 ("mptcp: implement mptcp_pm_remove_subflow")
    Cc: stable@xxxxxxxxxxxxxxx
    Reviewed-by: Mat Martineau <martineau@xxxxxxxxxx>
    Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
    Link: https://patch.msgid.link/20240819-net-mptcp-pm-reusing-id-v1-7-38035d40de5b@xxxxxxxxxx
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 5d9baade5c3b4..5646c7275a92d 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -59,16 +59,6 @@ int mptcp_pm_remove_addr(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_
 	return 0;
 }
 
-int mptcp_pm_remove_subflow(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_list)
-{
-	pr_debug("msk=%p, rm_list_nr=%d", msk, rm_list->nr);
-
-	spin_lock_bh(&msk->pm.lock);
-	mptcp_pm_nl_rm_subflow_received(msk, rm_list);
-	spin_unlock_bh(&msk->pm.lock);
-	return 0;
-}
-
 /* path manager event handlers */
 
 void mptcp_pm_new_connection(struct mptcp_sock *msk, const struct sock *ssk, int server_side)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 6a85e9665080c..3b3e656a2ab09 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -883,8 +883,8 @@ static void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk)
 	mptcp_pm_nl_rm_addr_or_subflow(msk, &msk->pm.rm_list_rx, MPTCP_MIB_RMADDR);
 }
 
-void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk,
-				     const struct mptcp_rm_list *rm_list)
+static void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk,
+					    const struct mptcp_rm_list *rm_list)
 {
 	mptcp_pm_nl_rm_addr_or_subflow(msk, rm_list, MPTCP_MIB_RMSUBFLOW);
 }
@@ -1526,7 +1526,9 @@ static int mptcp_nl_remove_subflow_and_signal_addr(struct net *net,
 					  !(entry->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT));
 
 		if (remove_subflow) {
-			mptcp_pm_remove_subflow(msk, &list);
+			spin_lock_bh(&msk->pm.lock);
+			mptcp_pm_nl_rm_subflow_received(msk, &list);
+			spin_unlock_bh(&msk->pm.lock);
 		} else if (entry->flags & MPTCP_PM_ADDR_FLAG_SUBFLOW) {
 			/* If the subflow has been used, but now closed */
 			spin_lock_bh(&msk->pm.lock);
@@ -1674,18 +1676,14 @@ void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk,
 			alist.ids[alist.nr++] = entry->addr.id;
 	}
 
+	spin_lock_bh(&msk->pm.lock);
 	if (alist.nr) {
-		spin_lock_bh(&msk->pm.lock);
 		msk->pm.add_addr_signaled -= alist.nr;
 		mptcp_pm_remove_addr(msk, &alist);
-		spin_unlock_bh(&msk->pm.lock);
 	}
-
 	if (slist.nr)
-		mptcp_pm_remove_subflow(msk, &slist);
-
+		mptcp_pm_nl_rm_subflow_received(msk, &slist);
 	/* Reset counters: maybe some subflows have been removed before */
-	spin_lock_bh(&msk->pm.lock);
 	bitmap_fill(msk->pm.id_avail_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
 	msk->pm.local_addr_used = 0;
 	spin_unlock_bh(&msk->pm.lock);
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index b4d6710e6ca3a..c3cd68edab779 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -836,7 +836,6 @@ int mptcp_pm_announce_addr(struct mptcp_sock *msk,
 			   const struct mptcp_addr_info *addr,
 			   bool echo);
 int mptcp_pm_remove_addr(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_list);
-int mptcp_pm_remove_subflow(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_list);
 void mptcp_pm_remove_addrs(struct mptcp_sock *msk, struct list_head *rm_list);
 void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk,
 					struct list_head *rm_list);
@@ -931,8 +930,6 @@ static inline u8 subflow_get_local_id(const struct mptcp_subflow_context *subflo
 
 void __init mptcp_pm_nl_init(void);
 void mptcp_pm_nl_work(struct mptcp_sock *msk);
-void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk,
-				     const struct mptcp_rm_list *rm_list);
 unsigned int mptcp_pm_get_add_addr_signal_max(const struct mptcp_sock *msk);
 unsigned int mptcp_pm_get_add_addr_accept_max(const struct mptcp_sock *msk);
 unsigned int mptcp_pm_get_subflows_max(const struct mptcp_sock *msk);




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux