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Message-Id: <d964561c0d409848ea5724615c910e6d2ce53557.1465483698.git.lucien.xin@gmail.com> Date: Thu, 9 Jun 2016 22:48:18 +0800 From: Xin Long <lucien.xin@...il.com> To: network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org Cc: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>, Vlad Yasevich <vyasevich@...il.com>, daniel@...earbox.net, davem@...emloft.net, eric.dumazet@...il.com Subject: [PATCHv4 net-next] sctp: sctp should change socket state when shutdown is received Now sctp doesn't change socket state upon shutdown reception. It changes just the assoc state, even though it's a TCP-style socket. For some cases, if we really need to check sk->sk_state, it's necessary to fix this issue, at least when we use ss or netstat to dump, we can get a more exact information. As an improvement, we will change sk->sk_state when we change asoc->state to SHUTDOWN_RECEIVED, and also do it in sctp_shutdown to keep consistent with sctp_close. Signed-off-by: Xin Long <lucien.xin@...il.com> --- net/sctp/sm_sideeffect.c | 4 +++- net/sctp/socket.c | 8 ++++++-- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c index aa37122..12d4519 100644 --- a/net/sctp/sm_sideeffect.c +++ b/net/sctp/sm_sideeffect.c @@ -806,8 +806,10 @@ static void sctp_cmd_new_state(sctp_cmd_seq_t *cmds, /* Set the RCV_SHUTDOWN flag when a SHUTDOWN is received. */ if (sctp_state(asoc, SHUTDOWN_RECEIVED) && - sctp_sstate(sk, ESTABLISHED)) + sctp_sstate(sk, ESTABLISHED)) { + sk->sk_state = SCTP_SS_CLOSING; sk->sk_shutdown |= RCV_SHUTDOWN; + } } if (sctp_state(asoc, COOKIE_WAIT)) { diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 67154b8..125ddcb 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4193,6 +4193,7 @@ static void sctp_shutdown(struct sock *sk, int how) return; if (how & SEND_SHUTDOWN) { + sk->sk_state = SCTP_SS_CLOSING; ep = sctp_sk(sk)->ep; if (!list_empty(&ep->asocs)) { asoc = list_entry(ep->asocs.next, @@ -7564,10 +7565,13 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, /* If the association on the newsk is already closed before accept() * is called, set RCV_SHUTDOWN flag. */ - if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) + if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) { + newsk->sk_state = SCTP_SS_CLOSING; newsk->sk_shutdown |= RCV_SHUTDOWN; + } else { + newsk->sk_state = SCTP_SS_ESTABLISHED; + } - newsk->sk_state = SCTP_SS_ESTABLISHED; release_sock(newsk); } -- 2.1.0
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