[PATCH net-next 05/11] mptcp: remove multi addresses in PM

[Mat Martineau]

From: Geliang Tang <geliangt...@gmail.com>

This patch dropped the member rm_id of struct mptcp_pm_data. Use
rm_list_rx in mptcp_pm_nl_rm_addr_received instead of using rm_id.

In mptcp_pm_nl_rm_addr_received, iterated each address id from
pm.rm_list_rx, then shut down and closed each address id's subsocket.

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martin...@linux.intel.com>
---
 net/mptcp/pm_netlink.c | 36 ++++++++++++++++++++----------------
 net/mptcp/protocol.h   |  1 -
 2 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 1eb9d0139267..e8135702af39 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -575,36 +575,40 @@ static void mptcp_pm_nl_rm_addr_received(struct 
mptcp_sock *msk)
 {
        struct mptcp_subflow_context *subflow, *tmp;
        struct sock *sk = (struct sock *)msk;
+       u8 i;
 
-       pr_debug("address rm_id %d", msk->pm.rm_id);
+       pr_debug("address rm_list_nr %d", msk->pm.rm_list_rx.nr);
 
        msk_owned_by_me(msk);
 
-       if (!msk->pm.rm_id)
+       if (!msk->pm.rm_list_rx.nr)
                return;
 
        if (list_empty(&msk->conn_list))
                return;
 
-       list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) {
-               struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
-               int how = RCV_SHUTDOWN | SEND_SHUTDOWN;
+       for (i = 0; i < msk->pm.rm_list_rx.nr; i++) {
+               list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) {
+                       struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
+                       int how = RCV_SHUTDOWN | SEND_SHUTDOWN;
 
-               if (msk->pm.rm_id != subflow->remote_id)
-                       continue;
+                       if (msk->pm.rm_list_rx.ids[i] != subflow->remote_id)
+                               continue;
 
-               spin_unlock_bh(&msk->pm.lock);
-               mptcp_subflow_shutdown(sk, ssk, how);
-               mptcp_close_ssk(sk, ssk, subflow);
-               spin_lock_bh(&msk->pm.lock);
+                       pr_debug(" -> address rm_list_ids[%d]=%u", i, 
msk->pm.rm_list_rx.ids[i]);
+                       spin_unlock_bh(&msk->pm.lock);
+                       mptcp_subflow_shutdown(sk, ssk, how);
+                       mptcp_close_ssk(sk, ssk, subflow);
+                       spin_lock_bh(&msk->pm.lock);
 
-               msk->pm.add_addr_accepted--;
-               msk->pm.subflows--;
-               WRITE_ONCE(msk->pm.accept_addr, true);
+                       msk->pm.add_addr_accepted--;
+                       msk->pm.subflows--;
+                       WRITE_ONCE(msk->pm.accept_addr, true);
 
-               __MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMADDR);
+                       __MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMADDR);
 
-               break;
+                       break;
+               }
        }
 }
 
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 82a63abf2c7e..5324fbe40528 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -209,7 +209,6 @@ struct mptcp_pm_data {
        u8              status;
        struct mptcp_rm_list rm_list_tx;
        struct mptcp_rm_list rm_list_rx;
-       u8              rm_id;
 };
 
 struct mptcp_data_frag {
-- 
2.30.2