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net/smc: remove close abort worker 

With the introduction of the link group termination worker there is
no longer a need to postpone smc_close_active_abort() to a worker.
To protect socket destruction due to normal and abnormal socket
closing, the socket refcount is increased.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
This commit is contained in:
Ursula Braun 2019-10-21 16:13:15 +02:00 committed by Jakub Kicinski
parent f528ba24a8
commit 81cf4f4707
4 changed files with 19 additions and 10 deletions
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4
net/smc/af_smc.c
View File

@ -167,6 +167,7 @@ static int smc_release(struct socket *sock)
if (!sk)
goto out;
sock_hold(sk); /* sock_put below */
smc = smc_sk(sk);
/* cleanup for a dangling non-blocking connect */
@ -189,6 +190,7 @@ static int smc_release(struct socket *sock)
sock->sk = NULL;
release_sock(sk);
sock_put(sk); /* sock_hold above */
sock_put(sk); /* final sock_put */
out:
return rc;
@ -970,12 +972,14 @@ void smc_close_non_accepted(struct sock *sk)
{
struct smc_sock *smc = smc_sk(sk);
sock_hold(sk); /* sock_put below */
lock_sock(sk);
if (!sk->sk_lingertime)
/* wait for peer closing */
sk->sk_lingertime = SMC_MAX_STREAM_WAIT_TIMEOUT;
__smc_release(smc);
release_sock(sk);
sock_put(sk); /* sock_hold above */
sock_put(sk); /* final sock_put */
}

18
net/smc/smc_close.c
View File

@ -113,9 +113,10 @@ int smc_close_abort(struct smc_connection *conn)
/* terminate smc socket abnormally - active abort
* link group is terminated, i.e. RDMA communication no longer possible
*/
static void smc_close_active_abort(struct smc_sock *smc)
void smc_close_active_abort(struct smc_sock *smc)
{
struct sock *sk = &smc->sk;
bool release_clcsock = false;
if (sk->sk_state != SMC_INIT && smc->clcsock && smc->clcsock->sk) {
sk->sk_err = ECONNABORTED;
@ -137,11 +138,14 @@ static void smc_close_active_abort(struct smc_sock *smc)
cancel_delayed_work_sync(&smc->conn.tx_work);
lock_sock(sk);
sk->sk_state = SMC_CLOSED;
sock_put(sk); /* postponed passive closing */
break;
case SMC_PEERCLOSEWAIT1:
case SMC_PEERCLOSEWAIT2:
case SMC_PEERFINCLOSEWAIT:
sk->sk_state = SMC_CLOSED;
smc_conn_free(&smc->conn);
release_clcsock = true;
sock_put(sk); /* passive closing */
break;
case SMC_PROCESSABORT:
@ -156,6 +160,12 @@ static void smc_close_active_abort(struct smc_sock *smc)
sock_set_flag(sk, SOCK_DEAD);
sk->sk_state_change(sk);
if (release_clcsock) {
release_sock(sk);
smc_clcsock_release(smc);
lock_sock(sk);
}
}
static inline bool smc_close_sent_any_close(struct smc_connection *conn)
@ -328,12 +338,6 @@ static void smc_close_passive_work(struct work_struct *work)
lock_sock(sk);
old_state = sk->sk_state;
if (conn->killed) {
/* abnormal termination */
smc_close_active_abort(smc);
goto wakeup;
}
rxflags = &conn->local_rx_ctrl.conn_state_flags;
if (rxflags->peer_conn_abort) {
/* peer has not received all data */

1
net/smc/smc_close.h
View File

@ -25,5 +25,6 @@ int smc_close_shutdown_write(struct smc_sock *smc);
void smc_close_init(struct smc_sock *smc);
void smc_clcsock_release(struct smc_sock *smc);
int smc_close_abort(struct smc_connection *conn);
void smc_close_active_abort(struct smc_sock *smc);
#endif /* SMC_CLOSE_H */

6
net/smc/smc_core.c
View File

@ -519,9 +519,7 @@ static void smc_conn_kill(struct smc_connection *conn)
smc_sk_wake_ups(smc);
smc_lgr_unregister_conn(conn);
smc->sk.sk_err = ECONNABORTED;
sock_hold(&smc->sk); /* sock_put in close work */
if (!schedule_work(&conn->close_work))
sock_put(&smc->sk);
smc_close_active_abort(smc);
}
/* terminate link group */
@ -544,9 +542,11 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr)
read_unlock_bh(&lgr->conns_lock);
conn = rb_entry(node, struct smc_connection, alert_node);
smc = container_of(conn, struct smc_sock, conn);
sock_hold(&smc->sk); /* sock_put below */
lock_sock(&smc->sk);
smc_conn_kill(conn);
release_sock(&smc->sk);
sock_put(&smc->sk); /* sock_hold above */
read_lock_bh(&lgr->conns_lock);
node = rb_first(&lgr->conns_all);
}