[PATCH net-next 2/6] net/smc: handle state SMC_PEERFINCLOSEWAIT correctly

[Ursula Braun]

A state transition from closing state SMC_PEERFINCLOSEWAIT to closing
state SMC_APPFINCLOSEWAIT is not allowed. Once a closing indication
from the peer has been received, the socket reaches state SMC_CLOSED.

And receiving a peer_conn_abort just changes the state of the socket
into one of the states SMC_PROCESSABORT or SMC_CLOSED;
sending a peer_conn_abort occurs in smc_close_active() for state
SMC_PROCESSABORT only.

Signed-off-by: Ursula Braun <ubr...@linux.vnet.ibm.com>
---
 net/smc/smc_close.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index 6de909612bd0..3dc109f5db56 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -280,7 +280,6 @@ static void smc_close_passive_abort_received(struct 
smc_sock *smc)
        case SMC_APPFINCLOSEWAIT:
        case SMC_APPCLOSEWAIT1:
        case SMC_APPCLOSEWAIT2:
-               smc_close_abort(&smc->conn);
                sk->sk_state = SMC_PROCESSABORT;
                break;
        case SMC_PEERCLOSEWAIT1:
@@ -288,7 +287,6 @@ static void smc_close_passive_abort_received(struct 
smc_sock *smc)
                if (txflags->peer_done_writing &&
                    !smc_close_sent_any_close(&smc->conn)) {
                        /* just shutdown, but not yet closed locally */
-                       smc_close_abort(&smc->conn);
                        sk->sk_state = SMC_PROCESSABORT;
                } else {
                        sk->sk_state = SMC_CLOSED;
@@ -354,7 +352,6 @@ static void smc_close_passive_work(struct work_struct *work)
                /* fall through */
                /* to check for closing */
        case SMC_PEERCLOSEWAIT2:
-       case SMC_PEERFINCLOSEWAIT:
                if (!smc_cdc_rxed_any_close(conn))
                        break;
                if (sock_flag(sk, SOCK_DEAD) &&
@@ -366,6 +363,10 @@ static void smc_close_passive_work(struct work_struct 
*work)
                        sk->sk_state = SMC_APPFINCLOSEWAIT;
                }
                break;
+       case SMC_PEERFINCLOSEWAIT:
+               if (smc_cdc_rxed_any_close(conn))
+                       sk->sk_state = SMC_CLOSED;
+               break;
        case SMC_APPCLOSEWAIT1:
        case SMC_APPCLOSEWAIT2:
        case SMC_APPFINCLOSEWAIT:
-- 
2.13.5