summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2018-01-24 16:52:58 +0100
committerDavid S. Miller <davem@davemloft.net>2018-01-24 16:52:58 +0100
commit9e1a27cdaba7da6ab3b78798653c9be454810435 (patch)
tree9b8c9db6914f5b28249897b205df7dc6b91992f5
parentcxgb4/cxgb4vf: add support for ndo_set_vf_vlan (diff)
parentnet/smc: continue waiting if peer signals write_shutdown (diff)
downloadlinux-9e1a27cdaba7da6ab3b78798653c9be454810435.tar.xz
linux-9e1a27cdaba7da6ab3b78798653c9be454810435.zip
Merge branch 'net-smc-socket-closing-improvements'
Ursula Braun says: ==================== net/smc: socket closing improvements while the first 2 patches are just small cleanups, the remaing patches affect socket closing. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/smc/af_smc.c40
-rw-r--r--net/smc/smc_cdc.c11
-rw-r--r--net/smc/smc_cdc.h1
-rw-r--r--net/smc/smc_close.c103
-rw-r--r--net/smc/smc_tx.c4
-rw-r--r--net/smc/smc_wr.c31
-rw-r--r--net/smc/smc_wr.h2
7 files changed, 71 insertions, 121 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index daf8075f5a4c..05cbcd3a6f60 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -581,39 +581,32 @@ out_err:
static int smc_clcsock_accept(struct smc_sock *lsmc, struct smc_sock **new_smc)
{
- struct sock *sk = &lsmc->sk;
- struct socket *new_clcsock;
+ struct socket *new_clcsock = NULL;
+ struct sock *lsk = &lsmc->sk;
struct sock *new_sk;
int rc;
- release_sock(&lsmc->sk);
- new_sk = smc_sock_alloc(sock_net(sk), NULL);
+ release_sock(lsk);
+ new_sk = smc_sock_alloc(sock_net(lsk), NULL);
if (!new_sk) {
rc = -ENOMEM;
- lsmc->sk.sk_err = ENOMEM;
+ lsk->sk_err = ENOMEM;
*new_smc = NULL;
- lock_sock(&lsmc->sk);
+ lock_sock(lsk);
goto out;
}
*new_smc = smc_sk(new_sk);
rc = kernel_accept(lsmc->clcsock, &new_clcsock, 0);
- lock_sock(&lsmc->sk);
- if (rc < 0) {
- lsmc->sk.sk_err = -rc;
- new_sk->sk_state = SMC_CLOSED;
- sock_set_flag(new_sk, SOCK_DEAD);
- sk->sk_prot->unhash(new_sk);
- sock_put(new_sk);
- *new_smc = NULL;
- goto out;
- }
- if (lsmc->sk.sk_state == SMC_CLOSED) {
+ lock_sock(lsk);
+ if (rc < 0)
+ lsk->sk_err = -rc;
+ if (rc < 0 || lsk->sk_state == SMC_CLOSED) {
if (new_clcsock)
sock_release(new_clcsock);
new_sk->sk_state = SMC_CLOSED;
sock_set_flag(new_sk, SOCK_DEAD);
- sk->sk_prot->unhash(new_sk);
+ new_sk->sk_prot->unhash(new_sk);
sock_put(new_sk);
*new_smc = NULL;
goto out;
@@ -936,11 +929,12 @@ static void smc_tcp_listen_work(struct work_struct *work)
{
struct smc_sock *lsmc = container_of(work, struct smc_sock,
tcp_listen_work);
+ struct sock *lsk = &lsmc->sk;
struct smc_sock *new_smc;
int rc = 0;
- lock_sock(&lsmc->sk);
- while (lsmc->sk.sk_state == SMC_LISTEN) {
+ lock_sock(lsk);
+ while (lsk->sk_state == SMC_LISTEN) {
rc = smc_clcsock_accept(lsmc, &new_smc);
if (rc)
goto out;
@@ -949,15 +943,15 @@ static void smc_tcp_listen_work(struct work_struct *work)
new_smc->listen_smc = lsmc;
new_smc->use_fallback = false; /* assume rdma capability first*/
- sock_hold(&lsmc->sk); /* sock_put in smc_listen_work */
+ sock_hold(lsk); /* sock_put in smc_listen_work */
INIT_WORK(&new_smc->smc_listen_work, smc_listen_work);
smc_copy_sock_settings_to_smc(new_smc);
schedule_work(&new_smc->smc_listen_work);
}
out:
- release_sock(&lsmc->sk);
- lsmc->sk.sk_data_ready(&lsmc->sk); /* no more listening, wake accept */
+ release_sock(lsk);
+ lsk->sk_data_ready(lsk); /* no more listening, wake accept */
}
static int smc_listen(struct socket *sock, int backlog)
diff --git a/net/smc/smc_cdc.c b/net/smc/smc_cdc.c
index d4155ff6acde..51805334e001 100644
--- a/net/smc/smc_cdc.c
+++ b/net/smc/smc_cdc.c
@@ -57,9 +57,6 @@ static void smc_cdc_tx_handler(struct smc_wr_tx_pend_priv *pnd_snd,
cdcpend->conn);
}
smc_tx_sndbuf_nonfull(smc);
- if (smc->sk.sk_state != SMC_ACTIVE)
- /* wake up smc_close_wait_tx_pends() */
- smc->sk.sk_state_change(&smc->sk);
bh_unlock_sock(&smc->sk);
}
@@ -155,14 +152,6 @@ void smc_cdc_tx_dismiss_slots(struct smc_connection *conn)
(unsigned long)conn);
}
-bool smc_cdc_tx_has_pending(struct smc_connection *conn)
-{
- struct smc_link *link = &conn->lgr->lnk[SMC_SINGLE_LINK];
-
- return smc_wr_tx_has_pending(link, SMC_CDC_MSG_TYPE,
- smc_cdc_tx_filter, (unsigned long)conn);
-}
-
/********************************* receive ***********************************/
static inline bool smc_cdc_before(u16 seq1, u16 seq2)
diff --git a/net/smc/smc_cdc.h b/net/smc/smc_cdc.h
index 149ceda1b088..ab240b37ad11 100644
--- a/net/smc/smc_cdc.h
+++ b/net/smc/smc_cdc.h
@@ -214,7 +214,6 @@ void smc_cdc_tx_dismiss_slots(struct smc_connection *conn);
int smc_cdc_msg_send(struct smc_connection *conn, struct smc_wr_buf *wr_buf,
struct smc_cdc_tx_pend *pend);
int smc_cdc_get_slot_and_msg_send(struct smc_connection *conn);
-bool smc_cdc_tx_has_pending(struct smc_connection *conn);
int smc_cdc_init(void) __init;
#endif /* SMC_CDC_H */
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index e194c6cc308a..1468a2a3cdf4 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -19,8 +19,6 @@
#include "smc_cdc.h"
#include "smc_close.h"
-#define SMC_CLOSE_WAIT_TX_PENDS_TIME (5 * HZ)
-
static void smc_close_cleanup_listen(struct sock *parent)
{
struct sock *sk;
@@ -30,26 +28,6 @@ static void smc_close_cleanup_listen(struct sock *parent)
smc_close_non_accepted(sk);
}
-static void smc_close_wait_tx_pends(struct smc_sock *smc)
-{
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- struct sock *sk = &smc->sk;
- signed long timeout;
-
- timeout = SMC_CLOSE_WAIT_TX_PENDS_TIME;
- add_wait_queue(sk_sleep(sk), &wait);
- while (!signal_pending(current) && timeout) {
- int rc;
-
- rc = sk_wait_event(sk, &timeout,
- !smc_cdc_tx_has_pending(&smc->conn),
- &wait);
- if (rc)
- break;
- }
- remove_wait_queue(sk_sleep(sk), &wait);
-}
-
/* wait for sndbuf data being transmitted */
static void smc_close_stream_wait(struct smc_sock *smc, long timeout)
{
@@ -115,36 +93,38 @@ static int smc_close_abort(struct smc_connection *conn)
*/
static void smc_close_active_abort(struct smc_sock *smc)
{
+ struct sock *sk = &smc->sk;
+
struct smc_cdc_conn_state_flags *txflags =
&smc->conn.local_tx_ctrl.conn_state_flags;
- smc->sk.sk_err = ECONNABORTED;
+ sk->sk_err = ECONNABORTED;
if (smc->clcsock && smc->clcsock->sk) {
smc->clcsock->sk->sk_err = ECONNABORTED;
smc->clcsock->sk->sk_state_change(smc->clcsock->sk);
}
- switch (smc->sk.sk_state) {
+ switch (sk->sk_state) {
case SMC_INIT:
case SMC_ACTIVE:
- smc->sk.sk_state = SMC_PEERABORTWAIT;
+ sk->sk_state = SMC_PEERABORTWAIT;
break;
case SMC_APPCLOSEWAIT1:
case SMC_APPCLOSEWAIT2:
txflags->peer_conn_abort = 1;
sock_release(smc->clcsock);
if (!smc_cdc_rxed_any_close(&smc->conn))
- smc->sk.sk_state = SMC_PEERABORTWAIT;
+ sk->sk_state = SMC_PEERABORTWAIT;
else
- smc->sk.sk_state = SMC_CLOSED;
+ sk->sk_state = SMC_CLOSED;
break;
case SMC_PEERCLOSEWAIT1:
case SMC_PEERCLOSEWAIT2:
if (!txflags->peer_conn_closed) {
- smc->sk.sk_state = SMC_PEERABORTWAIT;
+ sk->sk_state = SMC_PEERABORTWAIT;
txflags->peer_conn_abort = 1;
sock_release(smc->clcsock);
} else {
- smc->sk.sk_state = SMC_CLOSED;
+ sk->sk_state = SMC_CLOSED;
}
break;
case SMC_PROCESSABORT:
@@ -153,7 +133,7 @@ static void smc_close_active_abort(struct smc_sock *smc)
txflags->peer_conn_abort = 1;
sock_release(smc->clcsock);
}
- smc->sk.sk_state = SMC_CLOSED;
+ sk->sk_state = SMC_CLOSED;
break;
case SMC_PEERFINCLOSEWAIT:
case SMC_PEERABORTWAIT:
@@ -161,8 +141,8 @@ static void smc_close_active_abort(struct smc_sock *smc)
break;
}
- sock_set_flag(&smc->sk, SOCK_DEAD);
- smc->sk.sk_state_change(&smc->sk);
+ sock_set_flag(sk, SOCK_DEAD);
+ sk->sk_state_change(sk);
}
static inline bool smc_close_sent_any_close(struct smc_connection *conn)
@@ -185,9 +165,9 @@ int smc_close_active(struct smc_sock *smc)
0 : sock_flag(sk, SOCK_LINGER) ?
sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
-again:
old_state = sk->sk_state;
- switch (old_state) {
+again:
+ switch (sk->sk_state) {
case SMC_INIT:
sk->sk_state = SMC_CLOSED;
if (smc->smc_listen_work.func)
@@ -214,6 +194,8 @@ again:
if (sk->sk_state == SMC_ACTIVE) {
/* send close request */
rc = smc_close_final(conn);
+ if (rc)
+ break;
sk->sk_state = SMC_PEERCLOSEWAIT1;
} else {
/* peer event has changed the state */
@@ -226,9 +208,10 @@ again:
!smc_close_sent_any_close(conn)) {
/* just shutdown wr done, send close request */
rc = smc_close_final(conn);
+ if (rc)
+ break;
}
sk->sk_state = SMC_CLOSED;
- smc_close_wait_tx_pends(smc);
break;
case SMC_APPCLOSEWAIT1:
case SMC_APPCLOSEWAIT2:
@@ -237,19 +220,19 @@ again:
release_sock(sk);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
- if (sk->sk_err != ECONNABORTED) {
- /* confirm close from peer */
- rc = smc_close_final(conn);
- if (rc)
- break;
- }
+ if (sk->sk_state != SMC_APPCLOSEWAIT1 &&
+ sk->sk_state != SMC_APPCLOSEWAIT2)
+ goto again;
+ /* confirm close from peer */
+ rc = smc_close_final(conn);
+ if (rc)
+ break;
if (smc_cdc_rxed_any_close(conn))
/* peer has closed the socket already */
sk->sk_state = SMC_CLOSED;
else
/* peer has just issued a shutdown write */
sk->sk_state = SMC_PEERFINCLOSEWAIT;
- smc_close_wait_tx_pends(smc);
break;
case SMC_PEERCLOSEWAIT1:
case SMC_PEERCLOSEWAIT2:
@@ -257,6 +240,8 @@ again:
!smc_close_sent_any_close(conn)) {
/* just shutdown wr done, send close request */
rc = smc_close_final(conn);
+ if (rc)
+ break;
}
/* peer sending PeerConnectionClosed will cause transition */
break;
@@ -269,7 +254,6 @@ again:
lock_sock(sk);
smc_close_abort(conn);
sk->sk_state = SMC_CLOSED;
- smc_close_wait_tx_pends(smc);
break;
case SMC_PEERABORTWAIT:
case SMC_CLOSED:
@@ -278,7 +262,7 @@ again:
}
if (old_state != sk->sk_state)
- sk->sk_state_change(&smc->sk);
+ sk->sk_state_change(sk);
return rc;
}
@@ -331,7 +315,7 @@ static void smc_close_passive_work(struct work_struct *work)
struct sock *sk = &smc->sk;
int old_state;
- lock_sock(&smc->sk);
+ lock_sock(sk);
old_state = sk->sk_state;
if (!conn->alert_token_local) {
@@ -340,7 +324,7 @@ static void smc_close_passive_work(struct work_struct *work)
goto wakeup;
}
- rxflags = &smc->conn.local_rx_ctrl.conn_state_flags;
+ rxflags = &conn->local_rx_ctrl.conn_state_flags;
if (rxflags->peer_conn_abort) {
smc_close_passive_abort_received(smc);
goto wakeup;
@@ -348,7 +332,7 @@ static void smc_close_passive_work(struct work_struct *work)
switch (sk->sk_state) {
case SMC_INIT:
- if (atomic_read(&smc->conn.bytes_to_rcv) ||
+ if (atomic_read(&conn->bytes_to_rcv) ||
(rxflags->peer_done_writing &&
!smc_cdc_rxed_any_close(conn)))
sk->sk_state = SMC_APPCLOSEWAIT1;
@@ -365,7 +349,7 @@ static void smc_close_passive_work(struct work_struct *work)
/* to check for closing */
case SMC_PEERCLOSEWAIT2:
case SMC_PEERFINCLOSEWAIT:
- if (!smc_cdc_rxed_any_close(&smc->conn))
+ if (!smc_cdc_rxed_any_close(conn))
break;
if (sock_flag(sk, SOCK_DEAD) &&
smc_close_sent_any_close(conn)) {
@@ -394,12 +378,12 @@ wakeup:
sk->sk_state_change(sk);
if ((sk->sk_state == SMC_CLOSED) &&
(sock_flag(sk, SOCK_DEAD) || !sk->sk_socket)) {
- smc_conn_free(&smc->conn);
+ smc_conn_free(conn);
schedule_delayed_work(&smc->sock_put_work,
SMC_CLOSE_SOCK_PUT_DELAY);
}
}
- release_sock(&smc->sk);
+ release_sock(sk);
}
void smc_close_sock_put_work(struct work_struct *work)
@@ -424,20 +408,21 @@ int smc_close_shutdown_write(struct smc_sock *smc)
0 : sock_flag(sk, SOCK_LINGER) ?
sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
-again:
old_state = sk->sk_state;
- switch (old_state) {
+again:
+ switch (sk->sk_state) {
case SMC_ACTIVE:
smc_close_stream_wait(smc, timeout);
release_sock(sk);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
+ if (sk->sk_state != SMC_ACTIVE)
+ goto again;
/* send close wr request */
rc = smc_close_wr(conn);
- if (sk->sk_state == SMC_ACTIVE)
- sk->sk_state = SMC_PEERCLOSEWAIT1;
- else
- goto again;
+ if (rc)
+ break;
+ sk->sk_state = SMC_PEERCLOSEWAIT1;
break;
case SMC_APPCLOSEWAIT1:
/* passive close */
@@ -446,8 +431,12 @@ again:
release_sock(sk);
cancel_delayed_work_sync(&conn->tx_work);
lock_sock(sk);
+ if (sk->sk_state != SMC_APPCLOSEWAIT1)
+ goto again;
/* confirm close from peer */
rc = smc_close_wr(conn);
+ if (rc)
+ break;
sk->sk_state = SMC_APPCLOSEWAIT2;
break;
case SMC_APPCLOSEWAIT2:
@@ -462,7 +451,7 @@ again:
}
if (old_state != sk->sk_state)
- sk->sk_state_change(&smc->sk);
+ sk->sk_state_change(sk);
return rc;
}
diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c
index 2e50fddf8ce9..fea6482233a6 100644
--- a/net/smc/smc_tx.c
+++ b/net/smc/smc_tx.c
@@ -86,7 +86,7 @@ static int smc_tx_wait_memory(struct smc_sock *smc, int flags)
rc = -EPIPE;
break;
}
- if (conn->local_rx_ctrl.conn_state_flags.peer_conn_abort) {
+ if (smc_cdc_rxed_any_close(conn)) {
rc = -ECONNRESET;
break;
}
@@ -107,7 +107,7 @@ static int smc_tx_wait_memory(struct smc_sock *smc, int flags)
sk_wait_event(sk, &timeo,
sk->sk_err ||
(sk->sk_shutdown & SEND_SHUTDOWN) ||
- smc_cdc_rxed_any_close_or_senddone(conn) ||
+ smc_cdc_rxed_any_close(conn) ||
atomic_read(&conn->sndbuf_space),
&wait);
}
diff --git a/net/smc/smc_wr.c b/net/smc/smc_wr.c
index de4537f66832..5ed94109d1d6 100644
--- a/net/smc/smc_wr.c
+++ b/net/smc/smc_wr.c
@@ -122,6 +122,7 @@ static void smc_wr_tx_tasklet_fn(unsigned long data)
again:
polled++;
do {
+ memset(&wc, 0, sizeof(wc));
rc = ib_poll_cq(dev->roce_cq_send, SMC_WR_MAX_POLL_CQE, wc);
if (polled == 1) {
ib_req_notify_cq(dev->roce_cq_send,
@@ -185,7 +186,7 @@ int smc_wr_tx_get_free_slot(struct smc_link *link,
if (rc)
return rc;
} else {
- rc = wait_event_interruptible_timeout(
+ rc = wait_event_timeout(
link->wr_tx_wait,
(smc_wr_tx_get_free_slot_index(link, &idx) != -EBUSY),
SMC_WR_TX_WAIT_FREE_SLOT_TIME);
@@ -198,8 +199,6 @@ int smc_wr_tx_get_free_slot(struct smc_link *link,
smc_lgr_terminate(lgr);
return -EPIPE;
}
- if (rc == -ERESTARTSYS)
- return -EINTR;
if (idx == link->wr_tx_cnt)
return -EPIPE;
}
@@ -300,18 +299,18 @@ int smc_wr_reg_send(struct smc_link *link, struct ib_mr *mr)
return rc;
}
-void smc_wr_tx_dismiss_slots(struct smc_link *link, u8 wr_rx_hdr_type,
+void smc_wr_tx_dismiss_slots(struct smc_link *link, u8 wr_tx_hdr_type,
smc_wr_tx_filter filter,
smc_wr_tx_dismisser dismisser,
unsigned long data)
{
struct smc_wr_tx_pend_priv *tx_pend;
- struct smc_wr_rx_hdr *wr_rx;
+ struct smc_wr_rx_hdr *wr_tx;
int i;
for_each_set_bit(i, link->wr_tx_mask, link->wr_tx_cnt) {
- wr_rx = (struct smc_wr_rx_hdr *)&link->wr_rx_bufs[i];
- if (wr_rx->type != wr_rx_hdr_type)
+ wr_tx = (struct smc_wr_rx_hdr *)&link->wr_tx_bufs[i];
+ if (wr_tx->type != wr_tx_hdr_type)
continue;
tx_pend = &link->wr_tx_pends[i].priv;
if (filter(tx_pend, data))
@@ -319,24 +318,6 @@ void smc_wr_tx_dismiss_slots(struct smc_link *link, u8 wr_rx_hdr_type,
}
}
-bool smc_wr_tx_has_pending(struct smc_link *link, u8 wr_rx_hdr_type,
- smc_wr_tx_filter filter, unsigned long data)
-{
- struct smc_wr_tx_pend_priv *tx_pend;
- struct smc_wr_rx_hdr *wr_rx;
- int i;
-
- for_each_set_bit(i, link->wr_tx_mask, link->wr_tx_cnt) {
- wr_rx = (struct smc_wr_rx_hdr *)&link->wr_rx_bufs[i];
- if (wr_rx->type != wr_rx_hdr_type)
- continue;
- tx_pend = &link->wr_tx_pends[i].priv;
- if (filter(tx_pend, data))
- return true;
- }
- return false;
-}
-
/****************************** receive queue ********************************/
int smc_wr_rx_register_handler(struct smc_wr_rx_handler *handler)
diff --git a/net/smc/smc_wr.h b/net/smc/smc_wr.h
index 2acf12b06063..ef0c3494c9cb 100644
--- a/net/smc/smc_wr.h
+++ b/net/smc/smc_wr.h
@@ -93,8 +93,6 @@ int smc_wr_tx_put_slot(struct smc_link *link,
int smc_wr_tx_send(struct smc_link *link,
struct smc_wr_tx_pend_priv *wr_pend_priv);
void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context);
-bool smc_wr_tx_has_pending(struct smc_link *link, u8 wr_rx_hdr_type,
- smc_wr_tx_filter filter, unsigned long data);
void smc_wr_tx_dismiss_slots(struct smc_link *lnk, u8 wr_rx_hdr_type,
smc_wr_tx_filter filter,
smc_wr_tx_dismisser dismisser,