If no subflows are attached to the 'subflow' endpoints that are being
flushed, the corresponding addr IDs will not be marked as available
again.
Mark all ID as being available when flushing all the 'subflow'
endpoints, and reset local_addr_used counter to cover these cases.
Note that mptcp_pm_remove_addrs_and_subflows() helper is only called for
flushing operations, not to remove a specific set of addresses and
subflows.
Fixes: 06faa2271034 ("mptcp: remove multi addresses and subflows in PM")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
Notes:
- v5: move the renaming of the helpers in a dedicated patch for -next
(Mat)
---
net/mptcp/pm_netlink.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 44336ee22707..00b3184be45b 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -1625,8 +1625,15 @@ static void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk,
mptcp_pm_remove_addr(msk, &alist);
spin_unlock_bh(&msk->pm.lock);
}
+
if (slist.nr)
mptcp_pm_remove_subflow(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);
}
static void mptcp_nl_remove_addrs_list(struct net *net,
--
2.45.2