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| author | Dmytro Shytyi <dmytro@shytyi.net> | 2022-09-26 16:27:38 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-09-28 18:52:03 -0700 |
| commit | d98a82a6afc764156d6ca7a437d52761ac9b062e (patch) | |
| tree | 9cebcff4fc4760c7c1f6bc9ea1da49f5cf773758 /net/mptcp | |
| parent | 3242abeb8da7071fa40d32346ed36343bee33b80 (diff) | |
| download | linux-stable-d98a82a6afc764156d6ca7a437d52761ac9b062e.tar.gz linux-stable-d98a82a6afc764156d6ca7a437d52761ac9b062e.tar.bz2 linux-stable-d98a82a6afc764156d6ca7a437d52761ac9b062e.zip | |
mptcp: handle defer connect in mptcp_sendmsg
When TCP_FASTOPEN_CONNECT has been set on the socket before a connect,
the defer flag is set and must be handled when sendmsg is called.
This is similar to what is done in tcp_sendmsg_locked().
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Co-developed-by: Benjamin Hesmans <benjamin.hesmans@tessares.net>
Signed-off-by: Benjamin Hesmans <benjamin.hesmans@tessares.net>
Signed-off-by: Dmytro Shytyi <dmytro@shytyi.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/protocol.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 866dfad3cde6..fc753896caa0 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1677,6 +1677,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { struct mptcp_sock *msk = mptcp_sk(sk); struct page_frag *pfrag; + struct socket *ssock; size_t copied = 0; int ret = 0; long timeo; @@ -1690,6 +1691,27 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) lock_sock(sk); + ssock = __mptcp_nmpc_socket(msk); + if (unlikely(ssock && inet_sk(ssock->sk)->defer_connect)) { + struct sock *ssk = ssock->sk; + int copied_syn = 0; + + lock_sock(ssk); + + ret = tcp_sendmsg_fastopen(ssk, msg, &copied_syn, len, NULL); + copied += copied_syn; + if (ret == -EINPROGRESS && copied_syn > 0) { + /* reflect the new state on the MPTCP socket */ + inet_sk_state_store(sk, inet_sk_state_load(ssk)); + release_sock(ssk); + goto out; + } else if (ret) { + release_sock(ssk); + goto out; + } + release_sock(ssk); + } + timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); if ((1 << sk->sk_state) & ~(TCPF_ESTABLISHED | TCPF_CLOSE_WAIT)) { |