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authorUrsula Braun <ubraun@linux.ibm.com>2019-10-21 16:13:15 +0200
committerJakub Kicinski <jakub.kicinski@netronome.com>2019-10-22 11:23:44 -0700
commit81cf4f4707af9704ac1c3dd177c8bd1fcc01da6c (patch)
tree7b9731f237fe6a1e047c0e6c072807a8d817c6ac /net
parentf528ba24a8ad61b8a5e55d34cb1da127ce67cf6e (diff)
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>
Diffstat (limited to 'net')
-rw-r--r--net/smc/af_smc.c4
-rw-r--r--net/smc/smc_close.c18
-rw-r--r--net/smc/smc_close.h1
-rw-r--r--net/smc/smc_core.c6
4 files changed, 19 insertions, 10 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 5b932583e407..91ea098fabd9 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -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 */
}
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index 2bbcd45a421e..d34e5adce2eb 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -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 */
diff --git a/net/smc/smc_close.h b/net/smc/smc_close.h
index 084c4f37aa96..634fea2b7c95 100644
--- a/net/smc/smc_close.h
+++ b/net/smc/smc_close.h
@@ -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 */
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 46d4b944c4c4..ed02eac636da 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -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);
}