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authorMat Martineau <mathew.j.martineau@linux.intel.com>2022-04-27 15:50:00 -0700
committerJakub Kicinski <kuba@kernel.org>2022-04-29 17:25:14 -0700
commit6961326e38fe571ac1d2180041ce3142c8fd24d5 (patch)
tree3d91298b8b65521883eed3367ccc2fb7d5386b17 /net
parent14b06811bec686af3dbba58141c23b06f3e385bd (diff)
downloadlinux-6961326e38fe571ac1d2180041ce3142c8fd24d5.tar.bz2
mptcp: Make kernel path manager check for userspace-managed sockets
Userspace-managed sockets should not have their subflows or advertisements changed by the kernel path manager. v3: Use helper function for PM mode (Paolo Abeni) Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/mptcp/pm_netlink.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index bbbbfb421eec..473e5aa7baf4 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -1220,7 +1220,8 @@ static int mptcp_nl_add_subflow_or_signal_addr(struct net *net)
while ((msk = mptcp_token_iter_next(net, &s_slot, &s_num)) != NULL) {
struct sock *sk = (struct sock *)msk;
- if (!READ_ONCE(msk->fully_established))
+ if (!READ_ONCE(msk->fully_established) ||
+ mptcp_pm_is_userspace(msk))
goto next;
lock_sock(sk);
@@ -1363,6 +1364,9 @@ static int mptcp_nl_remove_subflow_and_signal_addr(struct net *net,
struct sock *sk = (struct sock *)msk;
bool remove_subflow;
+ if (mptcp_pm_is_userspace(msk))
+ goto next;
+
if (list_empty(&msk->conn_list)) {
mptcp_pm_remove_anno_addr(msk, addr, false);
goto next;
@@ -1397,7 +1401,7 @@ static int mptcp_nl_remove_id_zero_address(struct net *net,
struct sock *sk = (struct sock *)msk;
struct mptcp_addr_info msk_local;
- if (list_empty(&msk->conn_list))
+ if (list_empty(&msk->conn_list) || mptcp_pm_is_userspace(msk))
goto next;
local_address((struct sock_common *)msk, &msk_local);
@@ -1504,9 +1508,11 @@ static void mptcp_nl_remove_addrs_list(struct net *net,
while ((msk = mptcp_token_iter_next(net, &s_slot, &s_num)) != NULL) {
struct sock *sk = (struct sock *)msk;
- lock_sock(sk);
- mptcp_pm_remove_addrs_and_subflows(msk, rm_list);
- release_sock(sk);
+ if (!mptcp_pm_is_userspace(msk)) {
+ lock_sock(sk);
+ mptcp_pm_remove_addrs_and_subflows(msk, rm_list);
+ release_sock(sk);
+ }
sock_put(sk);
cond_resched();
@@ -1779,7 +1785,7 @@ static int mptcp_nl_set_flags(struct net *net,
while ((msk = mptcp_token_iter_next(net, &s_slot, &s_num)) != NULL) {
struct sock *sk = (struct sock *)msk;
- if (list_empty(&msk->conn_list))
+ if (list_empty(&msk->conn_list) || mptcp_pm_is_userspace(msk))
goto next;
lock_sock(sk);