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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>
This commit is contained in:
David S. Miller 2018-01-24 10:52:58 -05:00
parent 9d5fd927d2 aa377e682d
commit 9e1a27cdab
7 changed files with 71 additions and 121 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
net/smc/af_smc.c
View File

@ -581,39 +581,32 @@ static int smc_connect(struct socket *sock, struct sockaddr *addr,
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)

11
net/smc/smc_cdc.c
View File

@ -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)

1
net/smc/smc_cdc.h
View File

@ -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 */

103
net/smc/smc_close.c
View File

@ -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 @@ int smc_close_active(struct smc_sock *smc)
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 @@ int smc_close_active(struct smc_sock *smc)
!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 @@ int smc_close_active(struct smc_sock *smc)
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 @@ int smc_close_active(struct smc_sock *smc)
!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 @@ int smc_close_active(struct smc_sock *smc)
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 @@ int smc_close_active(struct smc_sock *smc)
}
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 @@ static void smc_close_passive_work(struct work_struct *work)
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 @@ int smc_close_shutdown_write(struct smc_sock *smc)
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 @@ int smc_close_shutdown_write(struct smc_sock *smc)
}
if (old_state != sk->sk_state)
sk->sk_state_change(&smc->sk);
sk->sk_state_change(sk);
return rc;
}

4
net/smc/smc_tx.c
View File

@ -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);
}

31
net/smc/smc_wr.c
View File

@ -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)

2
net/smc/smc_wr.h
View File

@ -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,