Greg recently reported the following patches could not be applied without conflicts in this tree:
- 5d13349472ac ("mptcp: remove duplicate sk_reset_timer call") - f5ce0714623c ("mptcp: disable add_addr retransmission when timeout is 0")
Conflicts have been resolved, and documented in each patch.
Geliang Tang (2): mptcp: remove duplicate sk_reset_timer call mptcp: disable add_addr retransmission when timeout is 0
Documentation/networking/mptcp-sysctl.rst | 2 ++ net/mptcp/pm_netlink.c | 18 ++++++++++++------ 2 files changed, 14 insertions(+), 6 deletions(-)
From: Geliang Tang tanggeliang@kylinos.cn
commit 5d13349472ac8abcbcb94407969aa0fdc2e1f1be upstream.
sk_reset_timer() was called twice in mptcp_pm_alloc_anno_list.
Simplify the code by using a 'goto' statement to eliminate the duplication.
Note that this is not a fix, but it will help backporting the following patch. The same "Fixes" tag has been added for this reason.
Fixes: 93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout") Cc: stable@vger.kernel.org Signed-off-by: Geliang Tang tanggeliang@kylinos.cn Reviewed-by: Matthieu Baerts (NGI0) matttbe@kernel.org Signed-off-by: Matthieu Baerts (NGI0) matttbe@kernel.org Link: https://patch.msgid.link/20250815-net-mptcp-misc-fixes-6-17-rc2-v1-4-521fe99... Signed-off-by: Jakub Kicinski kuba@kernel.org [ Before commit e4c28e3d5c09 ("mptcp: pm: move generic PM helpers to pm.c"), mptcp_pm_alloc_anno_list() was in pm_netlink.c. The same patch can be applied there without conflicts. ] Signed-off-by: Matthieu Baerts (NGI0) matttbe@kernel.org --- net/mptcp/pm_netlink.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 4f65e8abf343..46f5f960472e 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -372,9 +372,7 @@ bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk, if (WARN_ON_ONCE(mptcp_pm_is_kernel(msk))) return false;
- sk_reset_timer(sk, &add_entry->add_timer, - jiffies + mptcp_get_add_addr_timeout(net)); - return true; + goto reset_timer; }
add_entry = kmalloc(sizeof(*add_entry), GFP_ATOMIC); @@ -388,6 +386,7 @@ bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk, add_entry->retrans_times = 0;
timer_setup(&add_entry->add_timer, mptcp_pm_add_timer, 0); +reset_timer: sk_reset_timer(sk, &add_entry->add_timer, jiffies + mptcp_get_add_addr_timeout(net));
From: Geliang Tang tanggeliang@kylinos.cn
commit f5ce0714623cffd00bf2a83e890d09c609b7f50a upstream.
When add_addr_timeout was set to 0, this caused the ADD_ADDR to be retransmitted immediately, which looks like a buggy behaviour. Instead, interpret 0 as "no retransmissions needed".
The documentation is updated to explicitly state that setting the timeout to 0 disables retransmission.
Fixes: 93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout") Cc: stable@vger.kernel.org Suggested-by: Matthieu Baerts matttbe@kernel.org Signed-off-by: Geliang Tang tanggeliang@kylinos.cn Reviewed-by: Matthieu Baerts (NGI0) matttbe@kernel.org Signed-off-by: Matthieu Baerts (NGI0) matttbe@kernel.org Link: https://patch.msgid.link/20250815-net-mptcp-misc-fixes-6-17-rc2-v1-5-521fe99... Signed-off-by: Jakub Kicinski kuba@kernel.org [ Before commit e4c28e3d5c09 ("mptcp: pm: move generic PM helpers to pm.c"), mptcp_pm_alloc_anno_list() was in pm_netlink.c. The same patch can be applied there without conflicts. ] Signed-off-by: Matthieu Baerts (NGI0) matttbe@kernel.org --- Documentation/networking/mptcp-sysctl.rst | 2 ++ net/mptcp/pm_netlink.c | 13 ++++++++++--- 2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/Documentation/networking/mptcp-sysctl.rst b/Documentation/networking/mptcp-sysctl.rst index 95598c21fc8e..09be0e68b9af 100644 --- a/Documentation/networking/mptcp-sysctl.rst +++ b/Documentation/networking/mptcp-sysctl.rst @@ -12,6 +12,8 @@ add_addr_timeout - INTEGER (seconds) resent to an MPTCP peer that has not acknowledged a previous ADD_ADDR message.
+ Do not retransmit if set to 0. + The default value matches TCP_RTO_MAX. This is a per-namespace sysctl.
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 46f5f960472e..b763729b85e0 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -293,6 +293,7 @@ static void mptcp_pm_add_timer(struct timer_list *timer) struct mptcp_pm_add_entry *entry = from_timer(entry, timer, add_timer); struct mptcp_sock *msk = entry->sock; struct sock *sk = (struct sock *)msk; + unsigned int timeout;
pr_debug("msk=%p\n", msk);
@@ -310,6 +311,10 @@ static void mptcp_pm_add_timer(struct timer_list *timer) goto out; }
+ timeout = mptcp_get_add_addr_timeout(sock_net(sk)); + if (!timeout) + goto out; + spin_lock_bh(&msk->pm.lock);
if (!mptcp_pm_should_add_signal_addr(msk)) { @@ -321,7 +326,7 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
if (entry->retrans_times < ADD_ADDR_RETRANS_MAX) sk_reset_timer(sk, timer, - jiffies + mptcp_get_add_addr_timeout(sock_net(sk))); + jiffies + timeout);
spin_unlock_bh(&msk->pm.lock);
@@ -363,6 +368,7 @@ bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk, struct mptcp_pm_add_entry *add_entry = NULL; struct sock *sk = (struct sock *)msk; struct net *net = sock_net(sk); + unsigned int timeout;
lockdep_assert_held(&msk->pm.lock);
@@ -387,8 +393,9 @@ bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
timer_setup(&add_entry->add_timer, mptcp_pm_add_timer, 0); reset_timer: - sk_reset_timer(sk, &add_entry->add_timer, - jiffies + mptcp_get_add_addr_timeout(net)); + timeout = mptcp_get_add_addr_timeout(net); + if (timeout) + sk_reset_timer(sk, &add_entry->add_timer, jiffies + timeout);
return true; }
linux-stable-mirror@lists.linaro.org
-
Matthieu Baerts (NGI0)