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mptcp: allow creating non-backup subflows

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Currently the 'backup' attribute of local endpoint
is ignored. Let's use it for the MP_JOIN handshake

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2020-09-14 10:01:16 +02:00 committed by David S. Miller
parent ef0da3b8a2
commit 4596a2c1b7
1 changed files with 2 additions and 1 deletions
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3
net/mptcp/subflow.c
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@ -20,6 +20,7 @@
#include <net/ip6_route.h>
#endif
#include <net/mptcp.h>
#include <uapi/linux/mptcp.h>
#include "protocol.h"
#include "mib.h"
@ -1090,7 +1091,7 @@ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc,
subflow->remote_token = remote_token;
subflow->local_id = local_id;
subflow->request_join = 1;
subflow->request_bkup = 1;
subflow->request_bkup = !!(loc->flags & MPTCP_PM_ADDR_FLAG_BACKUP);
mptcp_info2sockaddr(remote, &addr);
err = kernel_connect(sf, (struct sockaddr *)&addr, addrlen, O_NONBLOCK);