[PATCH mptcp-net 4/6] mptcp: pm: userspace: don't dump initial ID0

After the first patch of this series, the initial ID0 address is present
in the local addr list when the connection has been created. Not to
change the previous behaviour, but also to have a similar behaviour than
what is done with the in-kernel PM, the initial ID0 address is not
dumped with the rest.

If the address is removed, then re-added later with a new subflow, it
can be dumped.

Fixes: 34e74a5cf3b7 ("mptcp: implement mptcp_userspace_pm_dump_addr")
Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
---
 net/mptcp/pm_userspace.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 9c7fab6a59bf..c4d5161eefa7 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -609,7 +609,9 @@ int mptcp_userspace_pm_dump_addr(struct sk_buff *msg,
 	lock_sock(sk);
 	spin_lock_bh(&msk->pm.lock);
 	mptcp_for_each_userspace_pm_addr(msk, entry) {
-		if (test_bit(entry->addr.id, bitmap->map))
+		/* Ignore default ID0 & already sent */
+		if ((entry->addr.id == 0 && entry->flags == 0) ||
+		    test_bit(entry->addr.id, bitmap->map))
 			continue;
 
 		if (mptcp_pm_genl_fill_addr(msg, cb, entry) < 0)

-- 
2.53.0