6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Geliang Tang <tanggeliang@xxxxxxxxxx>
commit e0266319413d5d687ba7b6df7ca99e4b9724a4f2 upstream.
Just like in-kernel pm, when userspace pm does set_flags, it needs to send
out MP_PRIO signal, and also modify the flags of the corresponding address
entry in the local address list. This patch implements the missing logic.
Traverse all address entries on userspace_pm_local_addr_list to find the
local address entry, if bkup is true, set the flags of this entry with
FLAG_BACKUP, otherwise, clear FLAG_BACKUP.
Fixes: 892f396c8e68 ("mptcp: netlink: issue MP_PRIO signals from userspace PMs")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Geliang Tang <tanggeliang@xxxxxxxxxx>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Link: https://patch.msgid.link/20241112-net-mptcp-misc-6-12-pm-v1-1-b835580cefa8@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
[ Conflicts in pm_userspace.c, because commit 6a42477fe449 ("mptcp:
update set_flags interfaces"), is not in this version, and causes too
many conflicts when backporting it. The same code can still be added
at the same place, before sending the ACK. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mptcp/pm_userspace.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -563,6 +563,7 @@ int mptcp_userspace_pm_set_flags(struct
struct mptcp_pm_addr_entry *loc,
struct mptcp_pm_addr_entry *rem, u8 bkup)
{
+ struct mptcp_pm_addr_entry *entry;
struct mptcp_sock *msk;
int ret = -EINVAL;
struct sock *sk;
@@ -583,6 +584,17 @@ int mptcp_userspace_pm_set_flags(struct
rem->addr.family == AF_UNSPEC)
goto set_flags_err;
+ spin_lock_bh(&msk->pm.lock);
+ list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
+ if (mptcp_addresses_equal(&entry->addr, &loc->addr, false)) {
+ if (bkup)
+ entry->flags |= MPTCP_PM_ADDR_FLAG_BACKUP;
+ else
+ entry->flags &= ~MPTCP_PM_ADDR_FLAG_BACKUP;
+ }
+ }
+ spin_unlock_bh(&msk->pm.lock);
+
lock_sock(sk);
ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc->addr, &rem->addr, bkup);
release_sock(sk);
