-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
*
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
* Author: Zach Brown <zab@zabbo.net>
* Author: Peter J. Braam <braam@clusterfs.com>
* Author: Phil Schwan <phil@clusterfs.com>
* Author: Eric Barton <eric@bartonsoftware.com>
*
- * This file is part of Portals, http://www.sf.net/projects/sandiaportals/
+ * This file is part of Lustre, https://wiki.whamcloud.com/
*
* Portals is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include "socknal.h"
+#include "socklnd.h"
-/*
- * LIB functions follow
- *
- */
-int
-ksocknal_dist(lib_nal_t *nal, ptl_nid_t nid, unsigned long *dist)
+struct ksock_tx *
+ksocknal_alloc_tx(int type, int size)
{
- /* I would guess that if ksocknal_get_peer (nid) == NULL,
- and we're not routing, then 'nid' is very distant :) */
- if (nal->libnal_ni.ni_pid.nid == nid) {
- *dist = 0;
- } else {
- *dist = 1;
+ struct ksock_tx *tx = NULL;
+
+ if (type == KSOCK_MSG_NOOP) {
+ LASSERT(size == KSOCK_NOOP_TX_SIZE);
+
+ /* searching for a noop tx in free list */
+ spin_lock(&ksocknal_data.ksnd_tx_lock);
+
+ if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) {
+ tx = list_entry(ksocknal_data.ksnd_idle_noop_txs.next,
+ struct ksock_tx, tx_list);
+ LASSERT(tx->tx_desc_size == size);
+ list_del(&tx->tx_list);
+ }
+
+ spin_unlock(&ksocknal_data.ksnd_tx_lock);
}
- return 0;
-}
+ if (tx == NULL)
+ LIBCFS_ALLOC(tx, size);
-void
-ksocknal_free_ltx (ksock_ltx_t *ltx)
-{
- atomic_dec(&ksocknal_data.ksnd_nactive_ltxs);
- PORTAL_FREE(ltx, ltx->ltx_desc_size);
+ if (tx == NULL)
+ return NULL;
+
+ atomic_set(&tx->tx_refcount, 1);
+ tx->tx_zc_aborted = 0;
+ tx->tx_zc_capable = 0;
+ tx->tx_zc_checked = 0;
+ tx->tx_hstatus = LNET_MSG_STATUS_OK;
+ tx->tx_desc_size = size;
+
+ atomic_inc(&ksocknal_data.ksnd_nactive_txs);
+
+ return tx;
}
-int
-ksocknal_send_iov (ksock_conn_t *conn, ksock_tx_t *tx)
-{
- struct iovec *iov = tx->tx_iov;
- int nob;
- int rc;
+struct ksock_tx *
+ksocknal_alloc_tx_noop(__u64 cookie, int nonblk)
+{
+ struct ksock_tx *tx;
- LASSERT (tx->tx_niov > 0);
+ tx = ksocknal_alloc_tx(KSOCK_MSG_NOOP, KSOCK_NOOP_TX_SIZE);
+ if (tx == NULL) {
+ CERROR("Can't allocate noop tx desc\n");
+ return NULL;
+ }
- /* Never touch tx->tx_iov inside ksocknal_lib_send_iov() */
- rc = ksocknal_lib_send_iov(conn, tx);
+ tx->tx_conn = NULL;
+ tx->tx_lnetmsg = NULL;
+ tx->tx_kiov = NULL;
+ tx->tx_nkiov = 0;
+ tx->tx_iov = tx->tx_frags.virt.iov;
+ tx->tx_niov = 1;
+ tx->tx_nonblk = nonblk;
- if (rc <= 0) /* sent nothing? */
- return (rc);
+ tx->tx_msg.ksm_csum = 0;
+ tx->tx_msg.ksm_type = KSOCK_MSG_NOOP;
+ tx->tx_msg.ksm_zc_cookies[0] = 0;
+ tx->tx_msg.ksm_zc_cookies[1] = cookie;
- nob = rc;
- LASSERT (nob <= tx->tx_resid);
- tx->tx_resid -= nob;
+ return tx;
+}
- /* "consume" iov */
- do {
- LASSERT (tx->tx_niov > 0);
- if (nob < iov->iov_len) {
- iov->iov_base = (void *)(((unsigned long)(iov->iov_base)) + nob);
- iov->iov_len -= nob;
- return (rc);
- }
+void
+ksocknal_free_tx(struct ksock_tx *tx)
+{
+ atomic_dec(&ksocknal_data.ksnd_nactive_txs);
- nob -= iov->iov_len;
- tx->tx_iov = ++iov;
- tx->tx_niov--;
- } while (nob != 0);
+ if (tx->tx_lnetmsg == NULL && tx->tx_desc_size == KSOCK_NOOP_TX_SIZE) {
+ /* it's a noop tx */
+ spin_lock(&ksocknal_data.ksnd_tx_lock);
- return (rc);
-}
+ list_add(&tx->tx_list, &ksocknal_data.ksnd_idle_noop_txs);
-int
-ksocknal_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx)
-{
- ptl_kiov_t *kiov = tx->tx_kiov;
- int nob;
- int rc;
-
- LASSERT (tx->tx_niov == 0);
- LASSERT (tx->tx_nkiov > 0);
-
- /* Never touch tx->tx_kiov inside ksocknal_lib_send_kiov() */
- rc = ksocknal_lib_send_kiov(conn, tx);
-
- if (rc <= 0) /* sent nothing? */
- return (rc);
-
- nob = rc;
- LASSERT (nob <= tx->tx_resid);
- tx->tx_resid -= nob;
-
- /* "consume" kiov */
- do {
- LASSERT(tx->tx_nkiov > 0);
-
- if (nob < kiov->kiov_len) {
- kiov->kiov_offset += nob;
- kiov->kiov_len -= nob;
- return rc;
- }
-
- nob -= kiov->kiov_len;
- tx->tx_kiov = ++kiov;
- tx->tx_nkiov--;
- } while (nob != 0);
-
- return (rc);
+ spin_unlock(&ksocknal_data.ksnd_tx_lock);
+ } else {
+ LIBCFS_FREE(tx, tx->tx_desc_size);
+ }
}
-int
-ksocknal_transmit (ksock_conn_t *conn, ksock_tx_t *tx)
+static int
+ksocknal_send_iov(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
{
- int rc;
- int bufnob;
-
- if (ksocknal_data.ksnd_stall_tx != 0) {
- set_current_state (TASK_UNINTERRUPTIBLE);
- schedule_timeout (cfs_time_seconds(ksocknal_data.ksnd_stall_tx));
- }
+ struct kvec *iov = tx->tx_iov;
+ int nob;
+ int rc;
- LASSERT (tx->tx_resid != 0);
+ LASSERT(tx->tx_niov > 0);
- rc = ksocknal_getconnsock (conn);
- if (rc != 0) {
- LASSERT (conn->ksnc_closing);
- return (-ESHUTDOWN);
- }
+ /* Never touch tx->tx_iov inside ksocknal_lib_send_iov() */
+ rc = ksocknal_lib_send_iov(conn, tx, scratch_iov);
- do {
- if (ksocknal_data.ksnd_enomem_tx > 0) {
- /* testing... */
- ksocknal_data.ksnd_enomem_tx--;
- rc = -EAGAIN;
- } else if (tx->tx_niov != 0) {
- rc = ksocknal_send_iov (conn, tx);
- } else {
- rc = ksocknal_send_kiov (conn, tx);
- }
+ if (rc <= 0) /* sent nothing? */
+ return rc;
- bufnob = SOCK_WMEM_QUEUED(conn->ksnc_sock);
- if (rc > 0) /* sent something? */
- conn->ksnc_tx_bufnob += rc; /* account it */
-
- if (bufnob < conn->ksnc_tx_bufnob) {
- /* allocated send buffer bytes < computed; infer
- * something got ACKed */
- conn->ksnc_tx_deadline = cfs_time_shift(ksocknal_tunables.ksnd_io_timeout);
- conn->ksnc_peer->ksnp_last_alive = cfs_time_current();
- conn->ksnc_tx_bufnob = bufnob;
- mb();
- }
+ nob = rc;
+ LASSERT(nob <= tx->tx_resid);
+ tx->tx_resid -= nob;
- if (rc <= 0) { /* Didn't write anything? */
- unsigned long flags;
- ksock_sched_t *sched;
+ /* "consume" iov */
+ do {
+ LASSERT(tx->tx_niov > 0);
- if (rc == 0) /* some stacks return 0 instead of -EAGAIN */
- rc = -EAGAIN;
+ if (nob < (int) iov->iov_len) {
+ iov->iov_base += nob;
+ iov->iov_len -= nob;
+ return rc;
+ }
- if (rc != -EAGAIN)
- break;
+ nob -= iov->iov_len;
+ tx->tx_iov = ++iov;
+ tx->tx_niov--;
+ } while (nob != 0);
- /* Check if EAGAIN is due to memory pressure */
+ return rc;
+}
- sched = conn->ksnc_scheduler;
- spin_lock_irqsave(&sched->kss_lock, flags);
-
- if (!SOCK_TEST_NOSPACE(conn->ksnc_sock) &&
- !conn->ksnc_tx_ready) {
- /* SOCK_NOSPACE is set when the socket fills
- * and cleared in the write_space callback
- * (which also sets ksnc_tx_ready). If
- * SOCK_NOSPACE and ksnc_tx_ready are BOTH
- * zero, I didn't fill the socket and
- * write_space won't reschedule me, so I
- * return -ENOMEM to get my caller to retry
- * after a timeout */
- rc = -ENOMEM;
- }
+static int
+ksocknal_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
+{
+ lnet_kiov_t *kiov = tx->tx_kiov;
+ int nob;
+ int rc;
- spin_unlock_irqrestore(&sched->kss_lock, flags);
- break;
- }
+ LASSERT(tx->tx_niov == 0);
+ LASSERT(tx->tx_nkiov > 0);
- /* socket's wmem_queued now includes 'rc' bytes */
- atomic_sub (rc, &conn->ksnc_tx_nob);
- rc = 0;
+ /* Never touch tx->tx_kiov inside ksocknal_lib_send_kiov() */
+ rc = ksocknal_lib_send_kiov(conn, tx, scratch_iov);
- } while (tx->tx_resid != 0);
+ if (rc <= 0) /* sent nothing? */
+ return rc;
- ksocknal_putconnsock (conn);
- return (rc);
-}
+ nob = rc;
+ LASSERT(nob <= tx->tx_resid);
+ tx->tx_resid -= nob;
-int
-ksocknal_recv_iov (ksock_conn_t *conn)
-{
- struct iovec *iov = conn->ksnc_rx_iov;
- int nob;
- int rc;
-
- LASSERT (conn->ksnc_rx_niov > 0);
-
- /* Never touch conn->ksnc_rx_iov or change connection
- * status inside ksocknal_lib_recv_iov */
- rc = ksocknal_lib_recv_iov(conn);
-
- if (rc <= 0)
- return (rc);
-
- /* received something... */
- nob = rc;
-
- conn->ksnc_peer->ksnp_last_alive = cfs_time_current();
- conn->ksnc_rx_deadline = cfs_time_shift (ksocknal_tunables.ksnd_io_timeout);
- mb(); /* order with setting rx_started */
- conn->ksnc_rx_started = 1;
-
- conn->ksnc_rx_nob_wanted -= nob;
- conn->ksnc_rx_nob_left -= nob;
-
- do {
- LASSERT (conn->ksnc_rx_niov > 0);
-
- if (nob < iov->iov_len) {
- iov->iov_len -= nob;
- iov->iov_base = (void *)(((unsigned long)iov->iov_base) + nob);
- return (-EAGAIN);
- }
-
- nob -= iov->iov_len;
- conn->ksnc_rx_iov = ++iov;
- conn->ksnc_rx_niov--;
- } while (nob != 0);
-
- return (rc);
+ /* "consume" kiov */
+ do {
+ LASSERT(tx->tx_nkiov > 0);
+
+ if (nob < (int)kiov->kiov_len) {
+ kiov->kiov_offset += nob;
+ kiov->kiov_len -= nob;
+ return rc;
+ }
+
+ nob -= (int)kiov->kiov_len;
+ tx->tx_kiov = ++kiov;
+ tx->tx_nkiov--;
+ } while (nob != 0);
+
+ return rc;
}
-int
-ksocknal_recv_kiov (ksock_conn_t *conn)
+static int
+ksocknal_transmit(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
{
- ptl_kiov_t *kiov = conn->ksnc_rx_kiov;
- int nob;
- int rc;
- LASSERT (conn->ksnc_rx_nkiov > 0);
-
- /* Never touch conn->ksnc_rx_kiov or change connection
- * status inside ksocknal_lib_recv_iov */
- rc = ksocknal_lib_recv_kiov(conn);
-
- if (rc <= 0)
- return (rc);
-
- /* received something... */
- nob = rc;
-
- conn->ksnc_peer->ksnp_last_alive = cfs_time_current();
- conn->ksnc_rx_deadline = cfs_time_shift (ksocknal_tunables.ksnd_io_timeout);
- mb(); /* order with setting rx_started */
- conn->ksnc_rx_started = 1;
-
- conn->ksnc_rx_nob_wanted -= nob;
- conn->ksnc_rx_nob_left -= nob;
-
- do {
- LASSERT (conn->ksnc_rx_nkiov > 0);
-
- if (nob < kiov->kiov_len) {
- kiov->kiov_offset += nob;
- kiov->kiov_len -= nob;
- return -EAGAIN;
- }
-
- nob -= kiov->kiov_len;
- conn->ksnc_rx_kiov = ++kiov;
- conn->ksnc_rx_nkiov--;
- } while (nob != 0);
-
- return 1;
+ int rc;
+ int bufnob;
+
+ if (ksocknal_data.ksnd_stall_tx != 0) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(ksocknal_data.ksnd_stall_tx));
+ }
+
+ LASSERT(tx->tx_resid != 0);
+
+ rc = ksocknal_connsock_addref(conn);
+ if (rc != 0) {
+ LASSERT(conn->ksnc_closing);
+ return -ESHUTDOWN;
+ }
+
+ do {
+ if (ksocknal_data.ksnd_enomem_tx > 0) {
+ /* testing... */
+ ksocknal_data.ksnd_enomem_tx--;
+ rc = -EAGAIN;
+ } else if (tx->tx_niov != 0) {
+ rc = ksocknal_send_iov(conn, tx, scratch_iov);
+ } else {
+ rc = ksocknal_send_kiov(conn, tx, scratch_iov);
+ }
+
+ bufnob = conn->ksnc_sock->sk->sk_wmem_queued;
+ if (rc > 0) /* sent something? */
+ conn->ksnc_tx_bufnob += rc; /* account it */
+
+ if (bufnob < conn->ksnc_tx_bufnob) {
+ /* allocated send buffer bytes < computed; infer
+ * something got ACKed */
+ conn->ksnc_tx_deadline = ktime_get_seconds() +
+ lnet_get_lnd_timeout();
+ conn->ksnc_peer->ksnp_last_alive = ktime_get_seconds();
+ conn->ksnc_tx_bufnob = bufnob;
+ smp_mb();
+ }
+
+ if (rc <= 0) { /* Didn't write anything? */
+ /* some stacks return 0 instead of -EAGAIN */
+ if (rc == 0)
+ rc = -EAGAIN;
+
+ /* Check if EAGAIN is due to memory pressure */
+ if (rc == -EAGAIN && ksocknal_lib_memory_pressure(conn))
+ rc = -ENOMEM;
+
+ break;
+ }
+
+ /* socket's wmem_queued now includes 'rc' bytes */
+ atomic_sub (rc, &conn->ksnc_tx_nob);
+ rc = 0;
+
+ } while (tx->tx_resid != 0);
+
+ ksocknal_connsock_decref(conn);
+ return rc;
}
-int
-ksocknal_receive (ksock_conn_t *conn)
+static int
+ksocknal_recv_iov(struct ksock_conn *conn, struct kvec *scratchiov)
{
- /* Return 1 on success, 0 on EOF, < 0 on error.
- * Caller checks ksnc_rx_nob_wanted to determine
- * progress/completion. */
- int rc;
- ENTRY;
-
- if (ksocknal_data.ksnd_stall_rx != 0) {
- set_current_state (TASK_UNINTERRUPTIBLE);
- schedule_timeout(cfs_time_seconds (ksocknal_data.ksnd_stall_rx));
- }
+ struct kvec *iov = conn->ksnc_rx_iov;
+ int nob;
+ int rc;
- rc = ksocknal_getconnsock (conn);
- if (rc != 0) {
- LASSERT (conn->ksnc_closing);
- return (-ESHUTDOWN);
- }
+ LASSERT(conn->ksnc_rx_niov > 0);
- for (;;) {
- if (conn->ksnc_rx_niov != 0)
- rc = ksocknal_recv_iov (conn);
- else
- rc = ksocknal_recv_kiov (conn);
-
- if (rc <= 0) {
- /* error/EOF or partial receive */
- if (rc == -EAGAIN) {
- rc = 1;
- } else if (rc == 0 && conn->ksnc_rx_started) {
- /* EOF in the middle of a message */
- rc = -EPROTO;
- }
- break;
- }
+ /* Never touch conn->ksnc_rx_iov or change connection
+ * status inside ksocknal_lib_recv_iov */
+ rc = ksocknal_lib_recv_iov(conn, scratchiov);
- /* Completed a fragment */
+ if (rc <= 0)
+ return rc;
- if (conn->ksnc_rx_nob_wanted == 0) {
- /* Completed a message segment (header or payload) */
- if ((ksocknal_tunables.ksnd_eager_ack & conn->ksnc_type) != 0 &&
- (conn->ksnc_rx_state == SOCKNAL_RX_BODY ||
- conn->ksnc_rx_state == SOCKNAL_RX_BODY_FWD)) {
- /* Remind the socket to ack eagerly... */
- ksocknal_lib_eager_ack(conn);
- }
- rc = 1;
- break;
- }
- }
+ /* received something... */
+ nob = rc;
+
+ conn->ksnc_peer->ksnp_last_alive = ktime_get_seconds();
+ conn->ksnc_rx_deadline = ktime_get_seconds() +
+ lnet_get_lnd_timeout();
+ smp_mb(); /* order with setting rx_started */
+ conn->ksnc_rx_started = 1;
+
+ conn->ksnc_rx_nob_wanted -= nob;
+ conn->ksnc_rx_nob_left -= nob;
+
+ do {
+ LASSERT(conn->ksnc_rx_niov > 0);
+
+ if (nob < (int)iov->iov_len) {
+ iov->iov_len -= nob;
+ iov->iov_base += nob;
+ return -EAGAIN;
+ }
- ksocknal_putconnsock (conn);
- RETURN (rc);
+ nob -= iov->iov_len;
+ conn->ksnc_rx_iov = ++iov;
+ conn->ksnc_rx_niov--;
+ } while (nob != 0);
+
+ return rc;
}
-#if SOCKNAL_ZC
-void
-ksocknal_zc_callback (zccd_t *zcd)
+static int
+ksocknal_recv_kiov(struct ksock_conn *conn, struct page **rx_scratch_pgs,
+ struct kvec *scratch_iov)
{
- ksock_tx_t *tx = KSOCK_ZCCD_2_TX(zcd);
- ksock_sched_t *sched = tx->tx_conn->ksnc_scheduler;
- unsigned long flags;
- ENTRY;
+ lnet_kiov_t *kiov = conn->ksnc_rx_kiov;
+ int nob;
+ int rc;
+ LASSERT(conn->ksnc_rx_nkiov > 0);
+
+ /* Never touch conn->ksnc_rx_kiov or change connection
+ * status inside ksocknal_lib_recv_iov */
+ rc = ksocknal_lib_recv_kiov(conn, rx_scratch_pgs, scratch_iov);
+
+ if (rc <= 0)
+ return rc;
- /* Schedule tx for cleanup (can't do it now due to lock conflicts) */
+ /* received something... */
+ nob = rc;
- spin_lock_irqsave (&sched->kss_lock, flags);
+ conn->ksnc_peer->ksnp_last_alive = ktime_get_seconds();
+ conn->ksnc_rx_deadline = ktime_get_seconds() +
+ lnet_get_lnd_timeout();
+ smp_mb(); /* order with setting rx_started */
+ conn->ksnc_rx_started = 1;
- list_add_tail (&tx->tx_list, &sched->kss_zctxdone_list);
- cfs_waitq_signal (&sched->kss_waitq);
+ conn->ksnc_rx_nob_wanted -= nob;
+ conn->ksnc_rx_nob_left -= nob;
- spin_unlock_irqrestore (&sched->kss_lock, flags);
- EXIT;
+ do {
+ LASSERT(conn->ksnc_rx_nkiov > 0);
+
+ if (nob < (int) kiov->kiov_len) {
+ kiov->kiov_offset += nob;
+ kiov->kiov_len -= nob;
+ return -EAGAIN;
+ }
+
+ nob -= kiov->kiov_len;
+ conn->ksnc_rx_kiov = ++kiov;
+ conn->ksnc_rx_nkiov--;
+ } while (nob != 0);
+
+ return 1;
+}
+
+static int
+ksocknal_receive(struct ksock_conn *conn, struct page **rx_scratch_pgs,
+ struct kvec *scratch_iov)
+{
+ /* Return 1 on success, 0 on EOF, < 0 on error.
+ * Caller checks ksnc_rx_nob_wanted to determine
+ * progress/completion. */
+ int rc;
+ ENTRY;
+
+ if (ksocknal_data.ksnd_stall_rx != 0) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(ksocknal_data.ksnd_stall_rx));
+ }
+
+ rc = ksocknal_connsock_addref(conn);
+ if (rc != 0) {
+ LASSERT(conn->ksnc_closing);
+ return -ESHUTDOWN;
+ }
+
+ for (;;) {
+ if (conn->ksnc_rx_niov != 0)
+ rc = ksocknal_recv_iov(conn, scratch_iov);
+ else
+ rc = ksocknal_recv_kiov(conn, rx_scratch_pgs,
+ scratch_iov);
+
+ if (rc <= 0) {
+ /* error/EOF or partial receive */
+ if (rc == -EAGAIN) {
+ rc = 1;
+ } else if (rc == 0 && conn->ksnc_rx_started) {
+ /* EOF in the middle of a message */
+ rc = -EPROTO;
+ }
+ break;
+ }
+
+ /* Completed a fragment */
+
+ if (conn->ksnc_rx_nob_wanted == 0) {
+ rc = 1;
+ break;
+ }
+ }
+
+ ksocknal_connsock_decref(conn);
+ RETURN(rc);
}
-#endif
void
-ksocknal_tx_done (ksock_tx_t *tx, int asynch)
+ksocknal_tx_done(struct lnet_ni *ni, struct ksock_tx *tx, int rc)
{
- ksock_ltx_t *ltx;
+ struct lnet_msg *lnetmsg = tx->tx_lnetmsg;
+ enum lnet_msg_hstatus hstatus = tx->tx_hstatus;
ENTRY;
- if (tx->tx_conn != NULL) {
-#if SOCKNAL_ZC
- /* zero copy completion isn't always from
- * process_transmit() so it needs to keep a ref on
- * tx_conn... */
- if (asynch)
- ksocknal_put_conn (tx->tx_conn);
-#else
- LASSERT (!asynch);
-#endif
- }
+ LASSERT(ni != NULL || tx->tx_conn != NULL);
- if (tx->tx_isfwd) { /* was a forwarded packet? */
- kpr_fwd_done (&ksocknal_data.ksnd_router,
- KSOCK_TX_2_KPR_FWD_DESC (tx),
- (tx->tx_resid == 0) ? 0 : -ECONNABORTED);
- EXIT;
- return;
- }
+ if (!rc && (tx->tx_resid != 0 || tx->tx_zc_aborted)) {
+ rc = -EIO;
+ if (hstatus == LNET_MSG_STATUS_OK)
+ hstatus = LNET_MSG_STATUS_LOCAL_ERROR;
+ }
- /* local send */
- ltx = KSOCK_TX_2_KSOCK_LTX (tx);
+ if (tx->tx_conn != NULL)
+ ksocknal_conn_decref(tx->tx_conn);
- lib_finalize (&ksocknal_lib, ltx->ltx_private, ltx->ltx_cookie,
- (tx->tx_resid == 0) ? PTL_OK : PTL_FAIL);
+ ksocknal_free_tx(tx);
+ if (lnetmsg != NULL) { /* KSOCK_MSG_NOOP go without lnetmsg */
+ lnetmsg->msg_health_status = hstatus;
+ lnet_finalize(lnetmsg, rc);
+ }
- ksocknal_free_ltx (ltx);
- EXIT;
+ EXIT;
}
void
-ksocknal_tx_launched (ksock_tx_t *tx)
+ksocknal_txlist_done(struct lnet_ni *ni, struct list_head *txlist, int error)
+{
+ struct ksock_tx *tx;
+
+ while (!list_empty(txlist)) {
+ tx = list_entry(txlist->next, struct ksock_tx, tx_list);
+
+ if (error && tx->tx_lnetmsg != NULL) {
+ CNETERR("Deleting packet type %d len %d %s->%s\n",
+ le32_to_cpu(tx->tx_lnetmsg->msg_hdr.type),
+ le32_to_cpu(tx->tx_lnetmsg->msg_hdr.payload_length),
+ libcfs_nid2str(le64_to_cpu(tx->tx_lnetmsg->msg_hdr.src_nid)),
+ libcfs_nid2str(le64_to_cpu(tx->tx_lnetmsg->msg_hdr.dest_nid)));
+ } else if (error) {
+ CNETERR("Deleting noop packet\n");
+ }
+
+ list_del(&tx->tx_list);
+
+ if (tx->tx_hstatus == LNET_MSG_STATUS_OK) {
+ if (error == -ETIMEDOUT)
+ tx->tx_hstatus =
+ LNET_MSG_STATUS_LOCAL_TIMEOUT;
+ else if (error == -ENETDOWN ||
+ error == -EHOSTUNREACH ||
+ error == -ENETUNREACH ||
+ error == -ECONNREFUSED ||
+ error == -ECONNRESET)
+ tx->tx_hstatus = LNET_MSG_STATUS_REMOTE_DROPPED;
+ /*
+ * for all other errors we don't want to
+ * retransmit
+ */
+ else if (error)
+ tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR;
+ }
+
+ LASSERT(atomic_read(&tx->tx_refcount) == 1);
+ ksocknal_tx_done(ni, tx, error);
+ }
+}
+
+static void
+ksocknal_check_zc_req(struct ksock_tx *tx)
{
-#if SOCKNAL_ZC
- if (atomic_read (&tx->tx_zccd.zccd_count) != 1) {
- ksock_conn_t *conn = tx->tx_conn;
-
- /* zccd skbufs are still in-flight. First take a ref on
- * conn, so it hangs about for ksocknal_tx_done... */
- atomic_inc (&conn->ksnc_refcount);
-
- /* ...then drop the initial ref on zccd, so the zero copy
- * callback can occur */
- zccd_put (&tx->tx_zccd);
+ struct ksock_conn *conn = tx->tx_conn;
+ struct ksock_peer_ni *peer_ni = conn->ksnc_peer;
+
+ /* Set tx_msg.ksm_zc_cookies[0] to a unique non-zero cookie and add tx
+ * to ksnp_zc_req_list if some fragment of this message should be sent
+ * zero-copy. Our peer_ni will send an ACK containing this cookie when
+ * she has received this message to tell us we can signal completion.
+ * tx_msg.ksm_zc_cookies[0] remains non-zero while tx is on
+ * ksnp_zc_req_list. */
+ LASSERT (tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
+ LASSERT (tx->tx_zc_capable);
+
+ tx->tx_zc_checked = 1;
+
+ if (conn->ksnc_proto == &ksocknal_protocol_v1x ||
+ !conn->ksnc_zc_capable)
return;
- }
-#endif
- /* Any zero-copy-ness (if any) has completed; I can complete the
- * transmit now, avoiding an extra schedule */
- ksocknal_tx_done (tx, 0);
+
+ /* assign cookie and queue tx to pending list, it will be released when
+ * a matching ack is received. See ksocknal_handle_zcack() */
+
+ ksocknal_tx_addref(tx);
+
+ spin_lock(&peer_ni->ksnp_lock);
+
+ /* ZC_REQ is going to be pinned to the peer_ni */
+ tx->tx_deadline = ktime_get_seconds() +
+ lnet_get_lnd_timeout();
+
+ LASSERT (tx->tx_msg.ksm_zc_cookies[0] == 0);
+
+ tx->tx_msg.ksm_zc_cookies[0] = peer_ni->ksnp_zc_next_cookie++;
+
+ if (peer_ni->ksnp_zc_next_cookie == 0)
+ peer_ni->ksnp_zc_next_cookie = SOCKNAL_KEEPALIVE_PING + 1;
+
+ list_add_tail(&tx->tx_zc_list, &peer_ni->ksnp_zc_req_list);
+
+ spin_unlock(&peer_ni->ksnp_lock);
}
-int
-ksocknal_process_transmit (ksock_conn_t *conn, ksock_tx_t *tx)
+static void
+ksocknal_uncheck_zc_req(struct ksock_tx *tx)
{
- unsigned long flags;
- int rc;
-
- rc = ksocknal_transmit (conn, tx);
+ struct ksock_peer_ni *peer_ni = tx->tx_conn->ksnc_peer;
- CDEBUG (D_NET, "send(%d) %d\n", tx->tx_resid, rc);
+ LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
+ LASSERT(tx->tx_zc_capable);
- if (tx->tx_resid == 0) {
- /* Sent everything OK */
- LASSERT (rc == 0);
+ tx->tx_zc_checked = 0;
- ksocknal_tx_launched (tx);
- return (0);
- }
+ spin_lock(&peer_ni->ksnp_lock);
- if (rc == -EAGAIN)
- return (rc);
-
- if (rc == -ENOMEM) {
- static int counter;
-
- counter++; /* exponential backoff warnings */
- if ((counter & (-counter)) == counter)
- CWARN("%d ENOMEM tx %p (%u allocated)\n",
- counter, conn, atomic_read(&portal_kmemory));
-
- /* Queue on ksnd_enomem_conns for retry after a timeout */
- spin_lock_irqsave(&ksocknal_data.ksnd_reaper_lock, flags);
-
- /* enomem list takes over scheduler's ref... */
- LASSERT (conn->ksnc_tx_scheduled);
- list_add_tail(&conn->ksnc_tx_list,
- &ksocknal_data.ksnd_enomem_conns);
- if (!cfs_time_aftereq(cfs_time_add(cfs_time_current(),
- SOCKNAL_ENOMEM_RETRY),
- ksocknal_data.ksnd_reaper_waketime))
- cfs_waitq_signal (&ksocknal_data.ksnd_reaper_waitq);
-
- spin_unlock_irqrestore(&ksocknal_data.ksnd_reaper_lock, flags);
- return (rc);
- }
+ if (tx->tx_msg.ksm_zc_cookies[0] == 0) {
+ /* Not waiting for an ACK */
+ spin_unlock(&peer_ni->ksnp_lock);
+ return;
+ }
- /* Actual error */
- LASSERT (rc < 0);
+ tx->tx_msg.ksm_zc_cookies[0] = 0;
+ list_del(&tx->tx_zc_list);
- if (!conn->ksnc_closing) {
- switch (rc) {
- case -ECONNRESET:
- LCONSOLE_WARN("Host %u.%u.%u.%u reset our connection "
- "while we were sending data; it may have "
- "rebooted.\n",
- HIPQUAD(conn->ksnc_ipaddr));
- break;
- default:
- LCONSOLE_WARN("There was an unexpected network error "
- "while writing to %u.%u.%u.%u: %d.\n",
- HIPQUAD(conn->ksnc_ipaddr), rc);
- break;
- }
- CERROR("[%p] Error %d on write to "LPX64
- " ip %d.%d.%d.%d:%d\n", conn, rc,
- conn->ksnc_peer->ksnp_nid,
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- }
+ spin_unlock(&peer_ni->ksnp_lock);
- ksocknal_close_conn_and_siblings (conn, rc);
- ksocknal_tx_launched (tx);
+ ksocknal_tx_decref(tx);
+}
- return (rc);
+static int
+ksocknal_process_transmit(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
+{
+ int rc;
+ bool error_sim = false;
+
+ if (lnet_send_error_simulation(tx->tx_lnetmsg, &tx->tx_hstatus)) {
+ error_sim = true;
+ rc = -EINVAL;
+ goto simulate_error;
+ }
+
+ if (tx->tx_zc_capable && !tx->tx_zc_checked)
+ ksocknal_check_zc_req(tx);
+
+ rc = ksocknal_transmit(conn, tx, scratch_iov);
+
+ CDEBUG(D_NET, "send(%d) %d\n", tx->tx_resid, rc);
+
+ if (tx->tx_resid == 0) {
+ /* Sent everything OK */
+ LASSERT(rc == 0);
+
+ return 0;
+ }
+
+ if (rc == -EAGAIN)
+ return rc;
+
+ if (rc == -ENOMEM) {
+ static int counter;
+
+ counter++; /* exponential backoff warnings */
+ if ((counter & (-counter)) == counter)
+ CWARN("%u ENOMEM tx %p (%u allocated)\n",
+ counter, conn, atomic_read(&libcfs_kmemory));
+
+ /* Queue on ksnd_enomem_conns for retry after a timeout */
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
+
+ /* enomem list takes over scheduler's ref... */
+ LASSERT(conn->ksnc_tx_scheduled);
+ list_add_tail(&conn->ksnc_tx_list,
+ &ksocknal_data.ksnd_enomem_conns);
+ if (ktime_get_seconds() + SOCKNAL_ENOMEM_RETRY <
+ ksocknal_data.ksnd_reaper_waketime)
+ wake_up(&ksocknal_data.ksnd_reaper_waitq);
+
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
+
+ /*
+ * set the health status of the message which determines
+ * whether we should retry the transmit
+ */
+ tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR;
+ return (rc);
+ }
+
+simulate_error:
+
+ /* Actual error */
+ LASSERT(rc < 0);
+
+ if (!error_sim) {
+ /*
+ * set the health status of the message which determines
+ * whether we should retry the transmit
+ */
+ if (rc == -ETIMEDOUT)
+ tx->tx_hstatus = LNET_MSG_STATUS_REMOTE_TIMEOUT;
+ else
+ tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR;
+ }
+
+ if (!conn->ksnc_closing) {
+ switch (rc) {
+ case -ECONNRESET:
+ LCONSOLE_WARN("Host %pI4h reset our connection "
+ "while we were sending data; it may have "
+ "rebooted.\n",
+ &conn->ksnc_ipaddr);
+ break;
+ default:
+ LCONSOLE_WARN("There was an unexpected network error "
+ "while writing to %pI4h: %d.\n",
+ &conn->ksnc_ipaddr, rc);
+ break;
+ }
+ CDEBUG(D_NET, "[%p] Error %d on write to %s ip %pI4h:%d\n",
+ conn, rc, libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ &conn->ksnc_ipaddr, conn->ksnc_port);
+ }
+
+ if (tx->tx_zc_checked)
+ ksocknal_uncheck_zc_req(tx);
+
+ /* it's not an error if conn is being closed */
+ ksocknal_close_conn_and_siblings(conn,
+ (conn->ksnc_closing) ? 0 : rc);
+
+ return rc;
}
-void
-ksocknal_launch_autoconnect_locked (ksock_route_t *route)
+static void
+ksocknal_launch_connection_locked(struct ksock_route *route)
{
- unsigned long flags;
/* called holding write lock on ksnd_global_lock */
+
+ LASSERT (!route->ksnr_scheduled);
LASSERT (!route->ksnr_connecting);
-
- route->ksnr_connecting = 1; /* scheduling conn for autoconnectd */
- atomic_inc (&route->ksnr_refcount); /* extra ref for autoconnectd */
-
- spin_lock_irqsave (&ksocknal_data.ksnd_autoconnectd_lock, flags);
-
- list_add_tail (&route->ksnr_connect_list,
- &ksocknal_data.ksnd_autoconnectd_routes);
- cfs_waitq_signal (&ksocknal_data.ksnd_autoconnectd_waitq);
-
- spin_unlock_irqrestore (&ksocknal_data.ksnd_autoconnectd_lock, flags);
+ LASSERT ((ksocknal_route_mask() & ~route->ksnr_connected) != 0);
+
+ route->ksnr_scheduled = 1; /* scheduling conn for connd */
+ ksocknal_route_addref(route); /* extra ref for connd */
+
+ spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
+
+ list_add_tail(&route->ksnr_connd_list,
+ &ksocknal_data.ksnd_connd_routes);
+ wake_up(&ksocknal_data.ksnd_connd_waitq);
+
+ spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
}
-ksock_peer_t *
-ksocknal_find_target_peer_locked (ksock_tx_t *tx, ptl_nid_t nid)
+void
+ksocknal_launch_all_connections_locked(struct ksock_peer_ni *peer_ni)
{
- char ipbuf[PTL_NALFMT_SIZE];
- ptl_nid_t target_nid;
- int rc;
- ksock_peer_t *peer = ksocknal_find_peer_locked (nid);
-
- if (peer != NULL)
- return (peer);
-
- if (tx->tx_isfwd) {
- CERROR ("Can't send packet to "LPX64
- " %s: routed target is not a peer\n",
- nid, portals_nid2str(SOCKNAL, nid, ipbuf));
- return (NULL);
- }
-
- rc = kpr_lookup (&ksocknal_data.ksnd_router, nid, tx->tx_nob,
- &target_nid);
- if (rc != 0) {
- CERROR ("Can't route to "LPX64" %s: router error %d\n",
- nid, portals_nid2str(SOCKNAL, nid, ipbuf), rc);
- return (NULL);
- }
+ struct ksock_route *route;
- peer = ksocknal_find_peer_locked (target_nid);
- if (peer != NULL)
- return (peer);
+ /* called holding write lock on ksnd_global_lock */
+ for (;;) {
+ /* launch any/all connections that need it */
+ route = ksocknal_find_connectable_route_locked(peer_ni);
+ if (route == NULL)
+ return;
- CERROR ("Can't send packet to "LPX64" %s: no peer entry\n",
- target_nid, portals_nid2str(SOCKNAL, target_nid, ipbuf));
- return (NULL);
+ ksocknal_launch_connection_locked(route);
+ }
}
-ksock_conn_t *
-ksocknal_find_conn_locked (ksock_tx_t *tx, ksock_peer_t *peer)
+struct ksock_conn *
+ksocknal_find_conn_locked(struct ksock_peer_ni *peer_ni, struct ksock_tx *tx, int nonblk)
{
- struct list_head *tmp;
- ksock_conn_t *typed = NULL;
- int tnob = 0;
- ksock_conn_t *fallback = NULL;
- int fnob = 0;
- ksock_conn_t *conn;
-
- list_for_each (tmp, &peer->ksnp_conns) {
- ksock_conn_t *c = list_entry(tmp, ksock_conn_t, ksnc_list);
-#if SOCKNAL_ROUND_ROBIN
- const int nob = 0;
-#else
- int nob = atomic_read(&c->ksnc_tx_nob) +
- SOCK_WMEM_QUEUED(c->ksnc_sock);
-#endif
- LASSERT (!c->ksnc_closing);
+ struct list_head *tmp;
+ struct ksock_conn *conn;
+ struct ksock_conn *typed = NULL;
+ struct ksock_conn *fallback = NULL;
+ int tnob = 0;
+ int fnob = 0;
+
+ list_for_each(tmp, &peer_ni->ksnp_conns) {
+ struct ksock_conn *c = list_entry(tmp, struct ksock_conn,
+ ksnc_list);
+ int nob = atomic_read(&c->ksnc_tx_nob) +
+ c->ksnc_sock->sk->sk_wmem_queued;
+ int rc;
- if (fallback == NULL || nob < fnob) {
- fallback = c;
- fnob = nob;
- }
+ LASSERT (!c->ksnc_closing);
+ LASSERT (c->ksnc_proto != NULL &&
+ c->ksnc_proto->pro_match_tx != NULL);
- if (!ksocknal_tunables.ksnd_typed_conns)
- continue;
+ rc = c->ksnc_proto->pro_match_tx(c, tx, nonblk);
- switch (c->ksnc_type) {
+ switch (rc) {
default:
- CERROR("ksnc_type bad: %u\n", c->ksnc_type);
LBUG();
- case SOCKNAL_CONN_ANY:
- break;
- case SOCKNAL_CONN_BULK_IN:
+ case SOCKNAL_MATCH_NO: /* protocol rejected the tx */
continue;
- case SOCKNAL_CONN_BULK_OUT:
- if (tx->tx_nob < ksocknal_tunables.ksnd_min_bulk)
- continue;
- break;
- case SOCKNAL_CONN_CONTROL:
- if (tx->tx_nob >= ksocknal_tunables.ksnd_min_bulk)
- continue;
+
+ case SOCKNAL_MATCH_YES: /* typed connection */
+ if (typed == NULL || tnob > nob ||
+ (tnob == nob && *ksocknal_tunables.ksnd_round_robin &&
+ typed->ksnc_tx_last_post > c->ksnc_tx_last_post)) {
+ typed = c;
+ tnob = nob;
+ }
break;
- }
- if (typed == NULL || nob < tnob) {
- typed = c;
- tnob = nob;
+ case SOCKNAL_MATCH_MAY: /* fallback connection */
+ if (fallback == NULL || fnob > nob ||
+ (fnob == nob && *ksocknal_tunables.ksnd_round_robin &&
+ fallback->ksnc_tx_last_post > c->ksnc_tx_last_post)) {
+ fallback = c;
+ fnob = nob;
+ }
+ break;
}
}
/* prefer the typed selection */
conn = (typed != NULL) ? typed : fallback;
-#if SOCKNAL_ROUND_ROBIN
- if (conn != NULL) {
- /* round-robin all else being equal */
- list_del (&conn->ksnc_list);
- list_add_tail (&conn->ksnc_list, &peer->ksnp_conns);
- }
-#endif
+ if (conn != NULL)
+ conn->ksnc_tx_last_post = ktime_get_seconds();
+
return conn;
}
void
-ksocknal_queue_tx_locked (ksock_tx_t *tx, ksock_conn_t *conn)
+ksocknal_tx_prep(struct ksock_conn *conn, struct ksock_tx *tx)
+{
+ conn->ksnc_proto->pro_pack(tx);
+
+ atomic_add (tx->tx_nob, &conn->ksnc_tx_nob);
+ ksocknal_conn_addref(conn); /* +1 ref for tx */
+ tx->tx_conn = conn;
+}
+
+void
+ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn)
{
- unsigned long flags;
- ksock_sched_t *sched = conn->ksnc_scheduler;
+ struct ksock_sched *sched = conn->ksnc_scheduler;
+ struct ksock_msg *msg = &tx->tx_msg;
+ struct ksock_tx *ztx = NULL;
+ int bufnob = 0;
/* called holding global lock (read or irq-write) and caller may
* not have dropped this lock between finding conn and calling me,
* so we don't need the {get,put}connsock dance to deref
* ksnc_sock... */
LASSERT(!conn->ksnc_closing);
- LASSERT(tx->tx_resid == tx->tx_nob);
-
- CDEBUG (D_NET, "Sending to "LPX64" ip %d.%d.%d.%d:%d\n",
- conn->ksnc_peer->ksnp_nid,
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
-
- atomic_add (tx->tx_nob, &conn->ksnc_tx_nob);
- tx->tx_conn = conn;
-#if SOCKNAL_ZC
- zccd_init (&tx->tx_zccd, ksocknal_zc_callback);
- /* NB this sets 1 ref on zccd, so the callback can only occur after
- * I've released this ref. */
-#endif
- spin_lock_irqsave (&sched->kss_lock, flags);
-
- if (list_empty(&conn->ksnc_tx_queue) &&
- SOCK_WMEM_QUEUED(conn->ksnc_sock) == 0) {
- /* First packet starts the timeout */
- conn->ksnc_tx_deadline = cfs_time_shift(ksocknal_tunables.ksnd_io_timeout);
- conn->ksnc_tx_bufnob = 0;
- mb(); /* order with adding to tx_queue */
+ CDEBUG(D_NET, "Sending to %s ip %pI4h:%d\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ &conn->ksnc_ipaddr, conn->ksnc_port);
+
+ ksocknal_tx_prep(conn, tx);
+
+ /* Ensure the frags we've been given EXACTLY match the number of
+ * bytes we want to send. Many TCP/IP stacks disregard any total
+ * size parameters passed to them and just look at the frags.
+ *
+ * We always expect at least 1 mapped fragment containing the
+ * complete ksocknal message header. */
+ LASSERT (lnet_iov_nob (tx->tx_niov, tx->tx_iov) +
+ lnet_kiov_nob(tx->tx_nkiov, tx->tx_kiov) ==
+ (unsigned int)tx->tx_nob);
+ LASSERT (tx->tx_niov >= 1);
+ LASSERT (tx->tx_resid == tx->tx_nob);
+
+ CDEBUG (D_NET, "Packet %p type %d, nob %d niov %d nkiov %d\n",
+ tx, (tx->tx_lnetmsg != NULL) ? tx->tx_lnetmsg->msg_hdr.type:
+ KSOCK_MSG_NOOP,
+ tx->tx_nob, tx->tx_niov, tx->tx_nkiov);
+
+ bufnob = conn->ksnc_sock->sk->sk_wmem_queued;
+ spin_lock_bh(&sched->kss_lock);
+
+ if (list_empty(&conn->ksnc_tx_queue) && bufnob == 0) {
+ /* First packet starts the timeout */
+ conn->ksnc_tx_deadline = ktime_get_seconds() +
+ lnet_get_lnd_timeout();
+ if (conn->ksnc_tx_bufnob > 0) /* something got ACKed */
+ conn->ksnc_peer->ksnp_last_alive = ktime_get_seconds();
+ conn->ksnc_tx_bufnob = 0;
+ smp_mb(); /* order with adding to tx_queue */
+ }
+
+ if (msg->ksm_type == KSOCK_MSG_NOOP) {
+ /* The packet is noop ZC ACK, try to piggyback the ack_cookie
+ * on a normal packet so I don't need to send it */
+ LASSERT (msg->ksm_zc_cookies[1] != 0);
+ LASSERT (conn->ksnc_proto->pro_queue_tx_zcack != NULL);
+
+ if (conn->ksnc_proto->pro_queue_tx_zcack(conn, tx, 0))
+ ztx = tx; /* ZC ACK piggybacked on ztx release tx later */
+
+ } else {
+ /* It's a normal packet - can it piggback a noop zc-ack that
+ * has been queued already? */
+ LASSERT (msg->ksm_zc_cookies[1] == 0);
+ LASSERT (conn->ksnc_proto->pro_queue_tx_msg != NULL);
+
+ ztx = conn->ksnc_proto->pro_queue_tx_msg(conn, tx);
+ /* ztx will be released later */
}
- list_add_tail (&tx->tx_list, &conn->ksnc_tx_queue);
-
- if (conn->ksnc_tx_ready && /* able to send */
- !conn->ksnc_tx_scheduled) { /* not scheduled to send */
- /* +1 ref for scheduler */
- atomic_inc (&conn->ksnc_refcount);
- list_add_tail (&conn->ksnc_tx_list,
- &sched->kss_tx_conns);
- conn->ksnc_tx_scheduled = 1;
- cfs_waitq_signal (&sched->kss_waitq);
+ if (ztx != NULL) {
+ atomic_sub (ztx->tx_nob, &conn->ksnc_tx_nob);
+ list_add_tail(&ztx->tx_list, &sched->kss_zombie_noop_txs);
}
- spin_unlock_irqrestore (&sched->kss_lock, flags);
+ if (conn->ksnc_tx_ready && /* able to send */
+ !conn->ksnc_tx_scheduled) { /* not scheduled to send */
+ /* +1 ref for scheduler */
+ ksocknal_conn_addref(conn);
+ list_add_tail(&conn->ksnc_tx_list,
+ &sched->kss_tx_conns);
+ conn->ksnc_tx_scheduled = 1;
+ wake_up(&sched->kss_waitq);
+ }
+
+ spin_unlock_bh(&sched->kss_lock);
}
-ksock_route_t *
-ksocknal_find_connectable_route_locked (ksock_peer_t *peer)
+
+struct ksock_route *
+ksocknal_find_connectable_route_locked(struct ksock_peer_ni *peer_ni)
{
- struct list_head *tmp;
- ksock_route_t *route;
- int bits;
-
- list_for_each (tmp, &peer->ksnp_routes) {
- route = list_entry (tmp, ksock_route_t, ksnr_list);
- bits = route->ksnr_connected;
-
- if (ksocknal_tunables.ksnd_typed_conns) {
- /* All typed connections established? */
- if ((bits & KSNR_TYPED_ROUTES) == KSNR_TYPED_ROUTES)
- continue;
- } else {
- /* Untyped connection established? */
- if ((bits & (1 << SOCKNAL_CONN_ANY)) != 0)
- continue;
- }
-
- /* connection being established? */
- if (route->ksnr_connecting)
+ time64_t now = ktime_get_seconds();
+ struct list_head *tmp;
+ struct ksock_route *route;
+
+ list_for_each(tmp, &peer_ni->ksnp_routes) {
+ route = list_entry(tmp, struct ksock_route, ksnr_list);
+
+ LASSERT (!route->ksnr_connecting || route->ksnr_scheduled);
+
+ if (route->ksnr_scheduled) /* connections being established */
+ continue;
+
+ /* all route types connected ? */
+ if ((ksocknal_route_mask() & ~route->ksnr_connected) == 0)
continue;
- /* too soon to retry this guy? */
- if (!cfs_time_aftereq (cfs_time_current(), route->ksnr_timeout))
+ if (!(route->ksnr_retry_interval == 0 || /* first attempt */
+ now >= route->ksnr_timeout)) {
+ CDEBUG(D_NET,
+ "Too soon to retry route %pI4h "
+ "(cnted %d, interval %lld, %lld secs later)\n",
+ &route->ksnr_ipaddr,
+ route->ksnr_connected,
+ route->ksnr_retry_interval,
+ route->ksnr_timeout - now);
continue;
-
+ }
+
return (route);
}
-
+
return (NULL);
}
-ksock_route_t *
-ksocknal_find_connecting_route_locked (ksock_peer_t *peer)
+struct ksock_route *
+ksocknal_find_connecting_route_locked(struct ksock_peer_ni *peer_ni)
{
- struct list_head *tmp;
- ksock_route_t *route;
+ struct list_head *tmp;
+ struct ksock_route *route;
+
+ list_for_each(tmp, &peer_ni->ksnp_routes) {
+ route = list_entry(tmp, struct ksock_route, ksnr_list);
+
+ LASSERT (!route->ksnr_connecting || route->ksnr_scheduled);
- list_for_each (tmp, &peer->ksnp_routes) {
- route = list_entry (tmp, ksock_route_t, ksnr_list);
-
- if (route->ksnr_connecting)
+ if (route->ksnr_scheduled)
return (route);
}
-
+
return (NULL);
}
int
-ksocknal_launch_packet (ksock_tx_t *tx, ptl_nid_t nid)
+ksocknal_launch_packet(struct lnet_ni *ni, struct ksock_tx *tx,
+ struct lnet_process_id id)
{
- unsigned long flags;
- ksock_peer_t *peer;
- ksock_conn_t *conn;
- ksock_route_t *route;
- rwlock_t *g_lock;
-
- /* Ensure the frags we've been given EXACTLY match the number of
- * bytes we want to send. Many TCP/IP stacks disregard any total
- * size parameters passed to them and just look at the frags.
- *
- * We always expect at least 1 mapped fragment containing the
- * complete portals header. */
- LASSERT (lib_iov_nob (tx->tx_niov, tx->tx_iov) +
- lib_kiov_nob (tx->tx_nkiov, tx->tx_kiov) == tx->tx_nob);
- LASSERT (tx->tx_niov >= 1);
- LASSERT (tx->tx_iov[0].iov_len >= sizeof (ptl_hdr_t));
-
- CDEBUG (D_NET, "packet %p type %d, nob %d niov %d nkiov %d\n",
- tx, ((ptl_hdr_t *)tx->tx_iov[0].iov_base)->type,
- tx->tx_nob, tx->tx_niov, tx->tx_nkiov);
+ struct ksock_peer_ni *peer_ni;
+ struct ksock_conn *conn;
+ rwlock_t *g_lock;
+ int retry;
+ int rc;
- tx->tx_conn = NULL; /* only set when assigned a conn */
- tx->tx_resid = tx->tx_nob;
- tx->tx_hdr = (ptl_hdr_t *)tx->tx_iov[0].iov_base;
+ LASSERT (tx->tx_conn == NULL);
g_lock = &ksocknal_data.ksnd_global_lock;
-#if !SOCKNAL_ROUND_ROBIN
- read_lock (g_lock);
-
- peer = ksocknal_find_target_peer_locked (tx, nid);
- if (peer == NULL) {
- read_unlock (g_lock);
- return (-EHOSTUNREACH);
- }
- if (ksocknal_find_connectable_route_locked(peer) == NULL) {
- conn = ksocknal_find_conn_locked (tx, peer);
- if (conn != NULL) {
- /* I've got no autoconnect routes that need to be
- * connecting and I do have an actual connection... */
- ksocknal_queue_tx_locked (tx, conn);
- read_unlock (g_lock);
- return (0);
+ for (retry = 0;; retry = 1) {
+ read_lock(g_lock);
+ peer_ni = ksocknal_find_peer_locked(ni, id);
+ if (peer_ni != NULL) {
+ if (ksocknal_find_connectable_route_locked(peer_ni) == NULL) {
+ conn = ksocknal_find_conn_locked(peer_ni, tx, tx->tx_nonblk);
+ if (conn != NULL) {
+ /* I've got no routes that need to be
+ * connecting and I do have an actual
+ * connection... */
+ ksocknal_queue_tx_locked (tx, conn);
+ read_unlock(g_lock);
+ return (0);
+ }
+ }
}
- }
-
- /* I'll need a write lock... */
- read_unlock (g_lock);
-#endif
- write_lock_irqsave(g_lock, flags);
- peer = ksocknal_find_target_peer_locked (tx, nid);
- if (peer == NULL) {
- write_unlock_irqrestore(g_lock, flags);
- return (-EHOSTUNREACH);
- }
+ /* I'll need a write lock... */
+ read_unlock(g_lock);
- for (;;) {
- /* launch any/all autoconnections that need it */
- route = ksocknal_find_connectable_route_locked (peer);
- if (route == NULL)
+ write_lock_bh(g_lock);
+
+ peer_ni = ksocknal_find_peer_locked(ni, id);
+ if (peer_ni != NULL)
break;
- ksocknal_launch_autoconnect_locked (route);
+ write_unlock_bh(g_lock);
+
+ if ((id.pid & LNET_PID_USERFLAG) != 0) {
+ CERROR("Refusing to create a connection to "
+ "userspace process %s\n", libcfs_id2str(id));
+ return -EHOSTUNREACH;
+ }
+
+ if (retry) {
+ CERROR("Can't find peer_ni %s\n", libcfs_id2str(id));
+ return -EHOSTUNREACH;
+ }
+
+ rc = ksocknal_add_peer(ni, id,
+ LNET_NIDADDR(id.nid),
+ lnet_acceptor_port());
+ if (rc != 0) {
+ CERROR("Can't add peer_ni %s: %d\n",
+ libcfs_id2str(id), rc);
+ return rc;
+ }
}
- conn = ksocknal_find_conn_locked (tx, peer);
+ ksocknal_launch_all_connections_locked(peer_ni);
+
+ conn = ksocknal_find_conn_locked(peer_ni, tx, tx->tx_nonblk);
if (conn != NULL) {
/* Connection exists; queue message on it */
ksocknal_queue_tx_locked (tx, conn);
- write_unlock_irqrestore (g_lock, flags);
+ write_unlock_bh(g_lock);
return (0);
}
- route = ksocknal_find_connecting_route_locked (peer);
- if (route != NULL) {
- /* At least 1 connection is being established; queue the
- * message... */
- list_add_tail (&tx->tx_list, &peer->ksnp_tx_queue);
- write_unlock_irqrestore (g_lock, flags);
- return (0);
+ if (peer_ni->ksnp_accepting > 0 ||
+ ksocknal_find_connecting_route_locked (peer_ni) != NULL) {
+ /* the message is going to be pinned to the peer_ni */
+ tx->tx_deadline = ktime_get_seconds() +
+ lnet_get_lnd_timeout();
+
+ /* Queue the message until a connection is established */
+ list_add_tail(&tx->tx_list, &peer_ni->ksnp_tx_queue);
+ write_unlock_bh(g_lock);
+ return 0;
}
-
- write_unlock_irqrestore (g_lock, flags);
+
+ write_unlock_bh(g_lock);
+
+ /* NB Routes may be ignored if connections to them failed recently */
+ CNETERR("No usable routes to %s\n", libcfs_id2str(id));
+ tx->tx_hstatus = LNET_MSG_STATUS_REMOTE_ERROR;
return (-EHOSTUNREACH);
}
-ptl_err_t
-ksocknal_sendmsg(lib_nal_t *nal,
- void *private,
- lib_msg_t *cookie,
- ptl_hdr_t *hdr,
- int type,
- ptl_nid_t nid,
- ptl_pid_t pid,
- unsigned int payload_niov,
- struct iovec *payload_iov,
- ptl_kiov_t *payload_kiov,
- size_t payload_offset,
- size_t payload_nob)
+int
+ksocknal_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg)
{
- ksock_ltx_t *ltx;
- int desc_size;
- int rc;
+ int mpflag = 1;
+ int type = lntmsg->msg_type;
+ struct lnet_process_id target = lntmsg->msg_target;
+ unsigned int payload_niov = lntmsg->msg_niov;
+ struct kvec *payload_iov = lntmsg->msg_iov;
+ lnet_kiov_t *payload_kiov = lntmsg->msg_kiov;
+ unsigned int payload_offset = lntmsg->msg_offset;
+ unsigned int payload_nob = lntmsg->msg_len;
+ struct ksock_tx *tx;
+ int desc_size;
+ int rc;
/* NB 'private' is different depending on what we're sending.
* Just ignore it... */
- CDEBUG(D_NET, "sending "LPSZ" bytes in %d frags to nid:"LPX64
- " pid %d\n", payload_nob, payload_niov, nid , pid);
-
- LASSERT (payload_nob == 0 || payload_niov > 0);
- LASSERT (payload_niov <= PTL_MD_MAX_IOV);
-
- /* It must be OK to kmap() if required */
- LASSERT (payload_kiov == NULL || !in_interrupt ());
- /* payload is either all vaddrs or all pages */
- LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
-
- if (payload_iov != NULL)
- desc_size = offsetof(ksock_ltx_t, ltx_iov[1 + payload_niov]);
- else
- desc_size = offsetof(ksock_ltx_t, ltx_kiov[payload_niov]);
-
- if (in_interrupt() ||
- type == PTL_MSG_ACK ||
- type == PTL_MSG_REPLY) {
- /* Can't block if in interrupt or responding to an incoming
- * message */
- PORTAL_ALLOC_ATOMIC(ltx, desc_size);
- } else {
- PORTAL_ALLOC(ltx, desc_size);
- }
-
- if (ltx == NULL) {
- CERROR("Can't allocate tx desc type %d size %d %s\n",
- type, desc_size, in_interrupt() ? "(intr)" : "");
- return (PTL_NO_SPACE);
+ CDEBUG(D_NET, "sending %u bytes in %d frags to %s\n",
+ payload_nob, payload_niov, libcfs_id2str(target));
+
+ LASSERT (payload_nob == 0 || payload_niov > 0);
+ LASSERT (payload_niov <= LNET_MAX_IOV);
+ /* payload is either all vaddrs or all pages */
+ LASSERT (!(payload_kiov != NULL && payload_iov != NULL));
+ LASSERT (!in_interrupt ());
+
+ if (payload_iov != NULL)
+ desc_size = offsetof(struct ksock_tx,
+ tx_frags.virt.iov[1 + payload_niov]);
+ else
+ desc_size = offsetof(struct ksock_tx,
+ tx_frags.paged.kiov[payload_niov]);
+
+ if (lntmsg->msg_vmflush)
+ mpflag = cfs_memory_pressure_get_and_set();
+ tx = ksocknal_alloc_tx(KSOCK_MSG_LNET, desc_size);
+ if (tx == NULL) {
+ CERROR("Can't allocate tx desc type %d size %d\n",
+ type, desc_size);
+ if (lntmsg->msg_vmflush)
+ cfs_memory_pressure_restore(mpflag);
+ return (-ENOMEM);
}
- atomic_inc(&ksocknal_data.ksnd_nactive_ltxs);
-
- ltx->ltx_desc_size = desc_size;
-
- /* We always have 1 mapped frag for the header */
- ltx->ltx_tx.tx_iov = ltx->ltx_iov;
- ltx->ltx_iov[0].iov_base = <x->ltx_hdr;
- ltx->ltx_iov[0].iov_len = sizeof(*hdr);
- ltx->ltx_hdr = *hdr;
-
- ltx->ltx_private = private;
- ltx->ltx_cookie = cookie;
-
- ltx->ltx_tx.tx_isfwd = 0;
- ltx->ltx_tx.tx_nob = sizeof (*hdr) + payload_nob;
+ tx->tx_conn = NULL; /* set when assigned a conn */
+ tx->tx_lnetmsg = lntmsg;
if (payload_iov != NULL) {
- /* payload is all mapped */
- ltx->ltx_tx.tx_kiov = NULL;
- ltx->ltx_tx.tx_nkiov = 0;
-
- ltx->ltx_tx.tx_niov =
- 1 + lib_extract_iov(payload_niov, <x->ltx_iov[1],
- payload_niov, payload_iov,
- payload_offset, payload_nob);
+ tx->tx_kiov = NULL;
+ tx->tx_nkiov = 0;
+ tx->tx_iov = tx->tx_frags.virt.iov;
+ tx->tx_niov = 1 +
+ lnet_extract_iov(payload_niov, &tx->tx_iov[1],
+ payload_niov, payload_iov,
+ payload_offset, payload_nob);
} else {
- /* payload is all pages */
- ltx->ltx_tx.tx_niov = 1;
-
- ltx->ltx_tx.tx_kiov = ltx->ltx_kiov;
- ltx->ltx_tx.tx_nkiov =
- lib_extract_kiov(payload_niov, ltx->ltx_kiov,
- payload_niov, payload_kiov,
- payload_offset, payload_nob);
+ tx->tx_niov = 1;
+ tx->tx_iov = &tx->tx_frags.paged.iov;
+ tx->tx_kiov = tx->tx_frags.paged.kiov;
+ tx->tx_nkiov = lnet_extract_kiov(payload_niov, tx->tx_kiov,
+ payload_niov, payload_kiov,
+ payload_offset, payload_nob);
+
+ if (payload_nob >= *ksocknal_tunables.ksnd_zc_min_payload)
+ tx->tx_zc_capable = 1;
}
- rc = ksocknal_launch_packet(<x->ltx_tx, nid);
- if (rc == 0)
- return (PTL_OK);
-
- ksocknal_free_ltx(ltx);
- return (PTL_FAIL);
-}
+ tx->tx_msg.ksm_csum = 0;
+ tx->tx_msg.ksm_type = KSOCK_MSG_LNET;
+ tx->tx_msg.ksm_zc_cookies[0] = 0;
+ tx->tx_msg.ksm_zc_cookies[1] = 0;
-ptl_err_t
-ksocknal_send (lib_nal_t *nal, void *private, lib_msg_t *cookie,
- ptl_hdr_t *hdr, int type, ptl_nid_t nid, ptl_pid_t pid,
- unsigned int payload_niov, struct iovec *payload_iov,
- size_t payload_offset, size_t payload_len)
-{
- return (ksocknal_sendmsg(nal, private, cookie,
- hdr, type, nid, pid,
- payload_niov, payload_iov, NULL,
- payload_offset, payload_len));
-}
+ /* The first fragment will be set later in pro_pack */
+ rc = ksocknal_launch_packet(ni, tx, target);
+ if (!mpflag)
+ cfs_memory_pressure_restore(mpflag);
-ptl_err_t
-ksocknal_send_pages (lib_nal_t *nal, void *private, lib_msg_t *cookie,
- ptl_hdr_t *hdr, int type, ptl_nid_t nid, ptl_pid_t pid,
- unsigned int payload_niov, ptl_kiov_t *payload_kiov,
- size_t payload_offset, size_t payload_len)
-{
- return (ksocknal_sendmsg(nal, private, cookie,
- hdr, type, nid, pid,
- payload_niov, NULL, payload_kiov,
- payload_offset, payload_len));
-}
+ if (rc == 0)
+ return (0);
-void
-ksocknal_fwd_packet (void *arg, kpr_fwd_desc_t *fwd)
-{
- ptl_nid_t nid = fwd->kprfd_gateway_nid;
- ksock_ftx_t *ftx = (ksock_ftx_t *)&fwd->kprfd_scratch;
- int rc;
-
- CDEBUG (D_NET, "Forwarding [%p] -> "LPX64" ("LPX64"))\n", fwd,
- fwd->kprfd_gateway_nid, fwd->kprfd_target_nid);
-
- /* I'm the gateway; must be the last hop */
- if (nid == ksocknal_lib.libnal_ni.ni_pid.nid)
- nid = fwd->kprfd_target_nid;
-
- /* setup iov for hdr */
- ftx->ftx_iov.iov_base = fwd->kprfd_hdr;
- ftx->ftx_iov.iov_len = sizeof(ptl_hdr_t);
-
- ftx->ftx_tx.tx_isfwd = 1; /* This is a forwarding packet */
- ftx->ftx_tx.tx_nob = sizeof(ptl_hdr_t) + fwd->kprfd_nob;
- ftx->ftx_tx.tx_niov = 1;
- ftx->ftx_tx.tx_iov = &ftx->ftx_iov;
- ftx->ftx_tx.tx_nkiov = fwd->kprfd_niov;
- ftx->ftx_tx.tx_kiov = fwd->kprfd_kiov;
-
- rc = ksocknal_launch_packet (&ftx->ftx_tx, nid);
- if (rc != 0)
- kpr_fwd_done (&ksocknal_data.ksnd_router, fwd, rc);
+ lntmsg->msg_health_status = tx->tx_hstatus;
+ ksocknal_free_tx(tx);
+ return (-EIO);
}
int
-ksocknal_thread_start (int (*fn)(void *arg), void *arg)
+ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name)
{
- long pid = cfs_kernel_thread (fn, arg, 0);
- unsigned long flags;
+ struct task_struct *task = kthread_run(fn, arg, name);
- if (pid < 0)
- return ((int)pid);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
- write_lock_irqsave(&ksocknal_data.ksnd_global_lock, flags);
- ksocknal_data.ksnd_nthreads++;
- write_unlock_irqrestore(&ksocknal_data.ksnd_global_lock, flags);
- return (0);
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
+ ksocknal_data.ksnd_nthreads++;
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+ return 0;
}
void
ksocknal_thread_fini (void)
{
- unsigned long flags;
-
- write_lock_irqsave(&ksocknal_data.ksnd_global_lock, flags);
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
ksocknal_data.ksnd_nthreads--;
- write_unlock_irqrestore(&ksocknal_data.ksnd_global_lock, flags);
-}
-
-void
-ksocknal_fmb_callback (void *arg, int error)
-{
- ksock_fmb_t *fmb = (ksock_fmb_t *)arg;
- ksock_fmb_pool_t *fmp = fmb->fmb_pool;
- ptl_hdr_t *hdr = &fmb->fmb_hdr;
- ksock_conn_t *conn = NULL;
- ksock_sched_t *sched;
- unsigned long flags;
- char ipbuf[PTL_NALFMT_SIZE];
- char ipbuf2[PTL_NALFMT_SIZE];
-
- if (error != 0)
- CERROR("Failed to route packet from "
- LPX64" %s to "LPX64" %s: %d\n",
- le64_to_cpu(hdr->src_nid),
- portals_nid2str(SOCKNAL, le64_to_cpu(hdr->src_nid), ipbuf),
- le64_to_cpu(hdr->dest_nid),
- portals_nid2str(SOCKNAL, le64_to_cpu(hdr->dest_nid), ipbuf2),
- error);
- else
- CDEBUG (D_NET, "routed packet from "LPX64" to "LPX64": OK\n",
- le64_to_cpu(hdr->src_nid), le64_to_cpu(hdr->dest_nid));
-
- /* drop peer ref taken on init */
- ksocknal_put_peer (fmb->fmb_peer);
-
- spin_lock_irqsave (&fmp->fmp_lock, flags);
-
- list_add (&fmb->fmb_list, &fmp->fmp_idle_fmbs);
- fmp->fmp_nactive_fmbs--;
-
- if (!list_empty (&fmp->fmp_blocked_conns)) {
- conn = list_entry (fmb->fmb_pool->fmp_blocked_conns.next,
- ksock_conn_t, ksnc_rx_list);
- list_del (&conn->ksnc_rx_list);
- }
-
- spin_unlock_irqrestore (&fmp->fmp_lock, flags);
-
- if (conn == NULL)
- return;
-
- CDEBUG (D_NET, "Scheduling conn %p\n", conn);
- LASSERT (conn->ksnc_rx_scheduled);
- LASSERT (conn->ksnc_rx_state == SOCKNAL_RX_FMB_SLEEP);
-
- conn->ksnc_rx_state = SOCKNAL_RX_GET_FMB;
-
- sched = conn->ksnc_scheduler;
-
- spin_lock_irqsave (&sched->kss_lock, flags);
-
- list_add_tail (&conn->ksnc_rx_list, &sched->kss_rx_conns);
- cfs_waitq_signal (&sched->kss_waitq);
-
- spin_unlock_irqrestore (&sched->kss_lock, flags);
-}
-
-ksock_fmb_t *
-ksocknal_get_idle_fmb (ksock_conn_t *conn)
-{
- int payload_nob = conn->ksnc_rx_nob_left;
- unsigned long flags;
- ksock_fmb_pool_t *pool;
- ksock_fmb_t *fmb;
-
- LASSERT (conn->ksnc_rx_state == SOCKNAL_RX_GET_FMB);
- LASSERT (kpr_routing(&ksocknal_data.ksnd_router));
-
- if (payload_nob <= SOCKNAL_SMALL_FWD_PAGES * CFS_PAGE_SIZE)
- pool = &ksocknal_data.ksnd_small_fmp;
- else
- pool = &ksocknal_data.ksnd_large_fmp;
-
- spin_lock_irqsave (&pool->fmp_lock, flags);
-
- if (!list_empty (&pool->fmp_idle_fmbs)) {
- fmb = list_entry(pool->fmp_idle_fmbs.next,
- ksock_fmb_t, fmb_list);
- list_del (&fmb->fmb_list);
- pool->fmp_nactive_fmbs++;
- spin_unlock_irqrestore (&pool->fmp_lock, flags);
-
- return (fmb);
- }
-
- /* deschedule until fmb free */
-
- conn->ksnc_rx_state = SOCKNAL_RX_FMB_SLEEP;
-
- list_add_tail (&conn->ksnc_rx_list,
- &pool->fmp_blocked_conns);
-
- spin_unlock_irqrestore (&pool->fmp_lock, flags);
- return (NULL);
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
}
int
-ksocknal_init_fmb (ksock_conn_t *conn, ksock_fmb_t *fmb)
+ksocknal_new_packet(struct ksock_conn *conn, int nob_to_skip)
{
- int payload_nob = conn->ksnc_rx_nob_left;
- ptl_nid_t dest_nid = le64_to_cpu(conn->ksnc_hdr.dest_nid);
- int niov = 0;
- int nob = payload_nob;
-
- LASSERT (conn->ksnc_rx_scheduled);
- LASSERT (conn->ksnc_rx_state == SOCKNAL_RX_GET_FMB);
- LASSERT (conn->ksnc_rx_nob_wanted == conn->ksnc_rx_nob_left);
- LASSERT (payload_nob >= 0);
- LASSERT (payload_nob <= fmb->fmb_pool->fmp_buff_pages * CFS_PAGE_SIZE);
- LASSERT (sizeof (ptl_hdr_t) < CFS_PAGE_SIZE);
- LASSERT (fmb->fmb_kiov[0].kiov_offset == 0);
-
- /* Take a ref on the conn's peer to prevent module unload before
- * forwarding completes. */
- fmb->fmb_peer = conn->ksnc_peer;
- atomic_inc (&conn->ksnc_peer->ksnp_refcount);
-
- /* Copy the header we just read into the forwarding buffer. If
- * there's payload, start reading reading it into the buffer,
- * otherwise the forwarding buffer can be kicked off
- * immediately. */
- fmb->fmb_hdr = conn->ksnc_hdr;
-
- while (nob > 0) {
- LASSERT (niov < fmb->fmb_pool->fmp_buff_pages);
- LASSERT (fmb->fmb_kiov[niov].kiov_offset == 0);
- fmb->fmb_kiov[niov].kiov_len = MIN (CFS_PAGE_SIZE, nob);
- nob -= CFS_PAGE_SIZE;
- niov++;
- }
-
- kpr_fwd_init(&fmb->fmb_fwd, dest_nid, &fmb->fmb_hdr,
- payload_nob, niov, fmb->fmb_kiov,
- ksocknal_fmb_callback, fmb);
-
- if (payload_nob == 0) { /* got complete packet already */
- CDEBUG (D_NET, "%p "LPX64"->"LPX64" fwd_start (immediate)\n",
- conn, le64_to_cpu(conn->ksnc_hdr.src_nid), dest_nid);
+ static char ksocknal_slop_buffer[4096];
+ int nob;
+ unsigned int niov;
+ int skipped;
- kpr_fwd_start (&ksocknal_data.ksnd_router, &fmb->fmb_fwd);
+ LASSERT(conn->ksnc_proto != NULL);
- ksocknal_new_packet (conn, 0); /* on to next packet */
- return (1);
+ if ((*ksocknal_tunables.ksnd_eager_ack & conn->ksnc_type) != 0) {
+ /* Remind the socket to ack eagerly... */
+ ksocknal_lib_eager_ack(conn);
}
- conn->ksnc_cookie = fmb; /* stash fmb for later */
- conn->ksnc_rx_state = SOCKNAL_RX_BODY_FWD; /* read in the payload */
-
- /* Set up conn->ksnc_rx_kiov to read the payload into fmb's kiov-ed
- * buffer */
- LASSERT (niov <= sizeof(conn->ksnc_rx_iov_space)/sizeof(ptl_kiov_t));
-
- conn->ksnc_rx_niov = 0;
- conn->ksnc_rx_nkiov = niov;
- conn->ksnc_rx_kiov = conn->ksnc_rx_iov_space.kiov;
- memcpy(conn->ksnc_rx_kiov, fmb->fmb_kiov, niov * sizeof(ptl_kiov_t));
-
- CDEBUG (D_NET, "%p "LPX64"->"LPX64" %d reading body\n", conn,
- le64_to_cpu(conn->ksnc_hdr.src_nid), dest_nid, payload_nob);
- return (0);
-}
-
-void
-ksocknal_fwd_parse (ksock_conn_t *conn)
-{
- ksock_peer_t *peer;
- ptl_nid_t dest_nid = le64_to_cpu(conn->ksnc_hdr.dest_nid);
- ptl_nid_t src_nid = le64_to_cpu(conn->ksnc_hdr.src_nid);
- int body_len = le32_to_cpu(conn->ksnc_hdr.payload_length);
- char str[PTL_NALFMT_SIZE];
- char str2[PTL_NALFMT_SIZE];
-
- CDEBUG (D_NET, "%p "LPX64"->"LPX64" %d parsing header\n", conn,
- src_nid, dest_nid, conn->ksnc_rx_nob_left);
+ if (nob_to_skip == 0) { /* right at next packet boundary now */
+ conn->ksnc_rx_started = 0;
+ smp_mb(); /* racing with timeout thread */
- LASSERT (conn->ksnc_rx_state == SOCKNAL_RX_HEADER);
- LASSERT (conn->ksnc_rx_scheduled);
-
- if (body_len < 0) { /* length corrupt (overflow) */
- CERROR("dropping packet from "LPX64" (%s) for "LPX64" (%s): "
- "packet size %d illegal\n",
- src_nid, portals_nid2str(TCPNAL, src_nid, str),
- dest_nid, portals_nid2str(TCPNAL, dest_nid, str2),
- body_len);
-
- ksocknal_new_packet (conn, 0); /* on to new packet */
- return;
- }
+ switch (conn->ksnc_proto->pro_version) {
+ case KSOCK_PROTO_V2:
+ case KSOCK_PROTO_V3:
+ conn->ksnc_rx_state = SOCKNAL_RX_KSM_HEADER;
+ conn->ksnc_rx_iov = (struct kvec *)&conn->ksnc_rx_iov_space;
+ conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg;
- if (!kpr_routing(&ksocknal_data.ksnd_router)) { /* not forwarding */
- CERROR("dropping packet from "LPX64" (%s) for "LPX64
- " (%s): not forwarding\n",
- src_nid, portals_nid2str(TCPNAL, src_nid, str),
- dest_nid, portals_nid2str(TCPNAL, dest_nid, str2));
- /* on to new packet (skip this one's body) */
- ksocknal_new_packet (conn, body_len);
- return;
- }
-
- if (body_len > PTL_MTU) { /* too big to forward */
- CERROR ("dropping packet from "LPX64" (%s) for "LPX64
- "(%s): packet size %d too big\n",
- src_nid, portals_nid2str(TCPNAL, src_nid, str),
- dest_nid, portals_nid2str(TCPNAL, dest_nid, str2),
- body_len);
- /* on to new packet (skip this one's body) */
- ksocknal_new_packet (conn, body_len);
- return;
- }
-
- /* should have gone direct */
- peer = ksocknal_get_peer (conn->ksnc_hdr.dest_nid);
- if (peer != NULL) {
- CERROR ("dropping packet from "LPX64" (%s) for "LPX64
- "(%s): target is a peer\n",
- src_nid, portals_nid2str(TCPNAL, src_nid, str),
- dest_nid, portals_nid2str(TCPNAL, dest_nid, str2));
- ksocknal_put_peer (peer); /* drop ref from get above */
-
- /* on to next packet (skip this one's body) */
- ksocknal_new_packet (conn, body_len);
- return;
- }
+ conn->ksnc_rx_nob_wanted = offsetof(struct ksock_msg, ksm_u);
+ conn->ksnc_rx_nob_left = offsetof(struct ksock_msg, ksm_u);
+ conn->ksnc_rx_iov[0].iov_len = offsetof(struct ksock_msg, ksm_u);
+ break;
- conn->ksnc_rx_state = SOCKNAL_RX_GET_FMB; /* Getting FMB now */
- conn->ksnc_rx_nob_left = body_len; /* stash packet size */
- conn->ksnc_rx_nob_wanted = body_len; /* (no slop) */
-}
+ case KSOCK_PROTO_V1:
+ /* Receiving bare struct lnet_hdr */
+ conn->ksnc_rx_state = SOCKNAL_RX_LNET_HEADER;
+ conn->ksnc_rx_nob_wanted = sizeof(struct lnet_hdr);
+ conn->ksnc_rx_nob_left = sizeof(struct lnet_hdr);
-int
-ksocknal_new_packet (ksock_conn_t *conn, int nob_to_skip)
-{
- static char ksocknal_slop_buffer[4096];
+ conn->ksnc_rx_iov = (struct kvec *)&conn->ksnc_rx_iov_space;
+ conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg.ksm_u.lnetmsg;
+ conn->ksnc_rx_iov[0].iov_len = sizeof(struct lnet_hdr);
+ break;
- int nob;
- int niov;
- int skipped;
-
- if (nob_to_skip == 0) { /* right at next packet boundary now */
- conn->ksnc_rx_started = 0;
- mb (); /* racing with timeout thread */
-
- conn->ksnc_rx_state = SOCKNAL_RX_HEADER;
- conn->ksnc_rx_nob_wanted = sizeof (ptl_hdr_t);
- conn->ksnc_rx_nob_left = sizeof (ptl_hdr_t);
-
- conn->ksnc_rx_iov = (struct iovec *)&conn->ksnc_rx_iov_space;
- conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_hdr;
- conn->ksnc_rx_iov[0].iov_len = sizeof (ptl_hdr_t);
+ default:
+ LBUG ();
+ }
conn->ksnc_rx_niov = 1;
conn->ksnc_rx_kiov = NULL;
conn->ksnc_rx_nkiov = 0;
+ conn->ksnc_rx_csum = ~0;
return (1);
}
- /* Set up to skip as much a possible now. If there's more left
+ /* Set up to skip as much as possible now. If there's more left
* (ran out of iov entries) we'll get called again */
conn->ksnc_rx_state = SOCKNAL_RX_SLOP;
conn->ksnc_rx_nob_left = nob_to_skip;
- conn->ksnc_rx_iov = (struct iovec *)&conn->ksnc_rx_iov_space;
+ conn->ksnc_rx_iov = (struct kvec *)&conn->ksnc_rx_iov_space;
skipped = 0;
niov = 0;
nob_to_skip -=nob;
} while (nob_to_skip != 0 && /* mustn't overflow conn's rx iov */
- niov < sizeof(conn->ksnc_rx_iov_space) / sizeof (struct iovec));
+ niov < sizeof(conn->ksnc_rx_iov_space) / sizeof(struct kvec));
conn->ksnc_rx_niov = niov;
conn->ksnc_rx_kiov = NULL;
return (0);
}
-int
-ksocknal_process_receive (ksock_conn_t *conn)
+static int
+ksocknal_process_receive(struct ksock_conn *conn,
+ struct page **rx_scratch_pgs,
+ struct kvec *scratch_iov)
{
- ksock_fmb_t *fmb;
- int rc;
-
- LASSERT (atomic_read (&conn->ksnc_refcount) > 0);
-
- /* doesn't need a forwarding buffer */
- if (conn->ksnc_rx_state != SOCKNAL_RX_GET_FMB)
- goto try_read;
-
- get_fmb:
- fmb = ksocknal_get_idle_fmb (conn);
- if (fmb == NULL) {
- /* conn descheduled waiting for idle fmb */
- return (0);
+ struct lnet_hdr *lhdr;
+ struct lnet_process_id *id;
+ int rc;
+
+ LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0);
+
+ /* NB: sched lock NOT held */
+ /* SOCKNAL_RX_LNET_HEADER is here for backward compatibility */
+ LASSERT(conn->ksnc_rx_state == SOCKNAL_RX_KSM_HEADER ||
+ conn->ksnc_rx_state == SOCKNAL_RX_LNET_PAYLOAD ||
+ conn->ksnc_rx_state == SOCKNAL_RX_LNET_HEADER ||
+ conn->ksnc_rx_state == SOCKNAL_RX_SLOP);
+ again:
+ if (conn->ksnc_rx_nob_wanted != 0) {
+ rc = ksocknal_receive(conn, rx_scratch_pgs,
+ scratch_iov);
+
+ if (rc <= 0) {
+ struct lnet_process_id ksnp_id;
+
+ ksnp_id = conn->ksnc_peer->ksnp_id;
+
+ LASSERT(rc != -EAGAIN);
+ if (rc == 0)
+ CDEBUG(D_NET, "[%p] EOF from %s "
+ "ip %pI4h:%d\n", conn,
+ libcfs_id2str(ksnp_id),
+ &conn->ksnc_ipaddr,
+ conn->ksnc_port);
+ else if (!conn->ksnc_closing)
+ CERROR("[%p] Error %d on read from %s "
+ "ip %pI4h:%d\n", conn, rc,
+ libcfs_id2str(ksnp_id),
+ &conn->ksnc_ipaddr,
+ conn->ksnc_port);
+
+ /* it's not an error if conn is being closed */
+ ksocknal_close_conn_and_siblings (conn,
+ (conn->ksnc_closing) ? 0 : rc);
+ return (rc == 0 ? -ESHUTDOWN : rc);
+ }
+
+ if (conn->ksnc_rx_nob_wanted != 0) {
+ /* short read */
+ return (-EAGAIN);
+ }
}
+ switch (conn->ksnc_rx_state) {
+ case SOCKNAL_RX_KSM_HEADER:
+ if (conn->ksnc_flip) {
+ __swab32s(&conn->ksnc_msg.ksm_type);
+ __swab32s(&conn->ksnc_msg.ksm_csum);
+ __swab64s(&conn->ksnc_msg.ksm_zc_cookies[0]);
+ __swab64s(&conn->ksnc_msg.ksm_zc_cookies[1]);
+ }
+
+ if (conn->ksnc_msg.ksm_type != KSOCK_MSG_NOOP &&
+ conn->ksnc_msg.ksm_type != KSOCK_MSG_LNET) {
+ CERROR("%s: Unknown message type: %x\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ conn->ksnc_msg.ksm_type);
+ ksocknal_new_packet(conn, 0);
+ ksocknal_close_conn_and_siblings(conn, -EPROTO);
+ return (-EPROTO);
+ }
+
+ if (conn->ksnc_msg.ksm_type == KSOCK_MSG_NOOP &&
+ conn->ksnc_msg.ksm_csum != 0 && /* has checksum */
+ conn->ksnc_msg.ksm_csum != conn->ksnc_rx_csum) {
+ /* NOOP Checksum error */
+ CERROR("%s: Checksum error, wire:0x%08X data:0x%08X\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ conn->ksnc_msg.ksm_csum, conn->ksnc_rx_csum);
+ ksocknal_new_packet(conn, 0);
+ ksocknal_close_conn_and_siblings(conn, -EPROTO);
+ return (-EIO);
+ }
+
+ if (conn->ksnc_msg.ksm_zc_cookies[1] != 0) {
+ __u64 cookie = 0;
+
+ LASSERT (conn->ksnc_proto != &ksocknal_protocol_v1x);
+
+ if (conn->ksnc_msg.ksm_type == KSOCK_MSG_NOOP)
+ cookie = conn->ksnc_msg.ksm_zc_cookies[0];
+
+ rc = conn->ksnc_proto->pro_handle_zcack(conn, cookie,
+ conn->ksnc_msg.ksm_zc_cookies[1]);
+
+ if (rc != 0) {
+ CERROR("%s: Unknown ZC-ACK cookie: %llu, %llu\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ cookie, conn->ksnc_msg.ksm_zc_cookies[1]);
+ ksocknal_new_packet(conn, 0);
+ ksocknal_close_conn_and_siblings(conn, -EPROTO);
+ return (rc);
+ }
+ }
+
+ if (conn->ksnc_msg.ksm_type == KSOCK_MSG_NOOP) {
+ ksocknal_new_packet (conn, 0);
+ return 0; /* NOOP is done and just return */
+ }
+
+ conn->ksnc_rx_state = SOCKNAL_RX_LNET_HEADER;
+ conn->ksnc_rx_nob_wanted = sizeof(struct ksock_lnet_msg);
+ conn->ksnc_rx_nob_left = sizeof(struct ksock_lnet_msg);
+
+ conn->ksnc_rx_iov = (struct kvec *)&conn->ksnc_rx_iov_space;
+ conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg.ksm_u.lnetmsg;
+ conn->ksnc_rx_iov[0].iov_len = sizeof(struct ksock_lnet_msg);
+
+ conn->ksnc_rx_niov = 1;
+ conn->ksnc_rx_kiov = NULL;
+ conn->ksnc_rx_nkiov = 0;
+
+ goto again; /* read lnet header now */
- if (ksocknal_init_fmb (conn, fmb)) {
- /* packet forwarded */
- return (0);
- }
+ case SOCKNAL_RX_LNET_HEADER:
+ /* unpack message header */
+ conn->ksnc_proto->pro_unpack(&conn->ksnc_msg);
- try_read:
- /* NB: sched lock NOT held */
- LASSERT (conn->ksnc_rx_state == SOCKNAL_RX_HEADER ||
- conn->ksnc_rx_state == SOCKNAL_RX_BODY ||
- conn->ksnc_rx_state == SOCKNAL_RX_BODY_FWD ||
- conn->ksnc_rx_state == SOCKNAL_RX_SLOP);
-
- LASSERT (conn->ksnc_rx_nob_wanted > 0);
-
- rc = ksocknal_receive(conn);
-
- if (rc <= 0) {
- LASSERT (rc != -EAGAIN);
-
- if (rc == 0)
- CWARN ("[%p] EOF from "LPX64" ip %d.%d.%d.%d:%d\n",
- conn, conn->ksnc_peer->ksnp_nid,
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- else if (!conn->ksnc_closing)
- CERROR ("[%p] Error %d on read from "LPX64
- " ip %d.%d.%d.%d:%d\n",
- conn, rc, conn->ksnc_peer->ksnp_nid,
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
-
- ksocknal_close_conn_and_siblings (conn, rc);
- return (rc == 0 ? -ESHUTDOWN : rc);
- }
+ if ((conn->ksnc_peer->ksnp_id.pid & LNET_PID_USERFLAG) != 0) {
+ /* Userspace peer_ni */
+ lhdr = &conn->ksnc_msg.ksm_u.lnetmsg.ksnm_hdr;
+ id = &conn->ksnc_peer->ksnp_id;
- if (conn->ksnc_rx_nob_wanted != 0) {
- /* short read */
- return (-EAGAIN);
- }
-
- switch (conn->ksnc_rx_state) {
- case SOCKNAL_RX_HEADER:
- if (conn->ksnc_hdr.type != cpu_to_le32(PTL_MSG_HELLO) &&
- le64_to_cpu(conn->ksnc_hdr.dest_nid) !=
- ksocknal_lib.libnal_ni.ni_pid.nid) {
- /* This packet isn't for me */
- ksocknal_fwd_parse (conn);
- switch (conn->ksnc_rx_state) {
- case SOCKNAL_RX_HEADER: /* skipped (zero payload) */
- return (0); /* => come back later */
- case SOCKNAL_RX_SLOP: /* skipping packet's body */
- goto try_read; /* => go read it */
- case SOCKNAL_RX_GET_FMB: /* forwarding */
- goto get_fmb; /* => go get a fwd msg buffer */
- default:
- LBUG ();
- }
- /* Not Reached */
+ /* Substitute process ID assigned at connection time */
+ lhdr->src_pid = cpu_to_le32(id->pid);
+ lhdr->src_nid = cpu_to_le64(id->nid);
}
- /* sets wanted_len, iovs etc */
- rc = lib_parse(&ksocknal_lib, &conn->ksnc_hdr, conn);
+ conn->ksnc_rx_state = SOCKNAL_RX_PARSE;
+ ksocknal_conn_addref(conn); /* ++ref while parsing */
- if (rc != PTL_OK) {
+ rc = lnet_parse(conn->ksnc_peer->ksnp_ni,
+ &conn->ksnc_msg.ksm_u.lnetmsg.ksnm_hdr,
+ conn->ksnc_peer->ksnp_id.nid, conn, 0);
+ if (rc < 0) {
/* I just received garbage: give up on this conn */
+ ksocknal_new_packet(conn, 0);
ksocknal_close_conn_and_siblings (conn, rc);
+ ksocknal_conn_decref(conn);
return (-EPROTO);
}
- if (conn->ksnc_rx_nob_wanted != 0) { /* need to get payload? */
- conn->ksnc_rx_state = SOCKNAL_RX_BODY;
- goto try_read; /* go read the payload */
- }
- /* Fall through (completed packet for me) */
+ /* I'm racing with ksocknal_recv() */
+ LASSERT (conn->ksnc_rx_state == SOCKNAL_RX_PARSE ||
+ conn->ksnc_rx_state == SOCKNAL_RX_LNET_PAYLOAD);
- case SOCKNAL_RX_BODY:
- /* payload all received */
- lib_finalize(&ksocknal_lib, NULL, conn->ksnc_cookie, PTL_OK);
- /* Fall through */
+ if (conn->ksnc_rx_state != SOCKNAL_RX_LNET_PAYLOAD)
+ return 0;
- case SOCKNAL_RX_SLOP:
- /* starting new packet? */
- if (ksocknal_new_packet (conn, conn->ksnc_rx_nob_left))
- return (0); /* come back later */
- goto try_read; /* try to finish reading slop now */
+ /* ksocknal_recv() got called */
+ goto again;
- case SOCKNAL_RX_BODY_FWD:
+ case SOCKNAL_RX_LNET_PAYLOAD:
/* payload all received */
- CDEBUG (D_NET, "%p "LPX64"->"LPX64" %d fwd_start (got body)\n",
- conn, le64_to_cpu(conn->ksnc_hdr.src_nid),
- le64_to_cpu(conn->ksnc_hdr.dest_nid),
- conn->ksnc_rx_nob_left);
+ rc = 0;
+
+ if (conn->ksnc_rx_nob_left == 0 && /* not truncating */
+ conn->ksnc_msg.ksm_csum != 0 && /* has checksum */
+ conn->ksnc_msg.ksm_csum != conn->ksnc_rx_csum) {
+ CERROR("%s: Checksum error, wire:0x%08X data:0x%08X\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ conn->ksnc_msg.ksm_csum, conn->ksnc_rx_csum);
+ rc = -EIO;
+ }
- /* forward the packet. NB ksocknal_init_fmb() put fmb into
- * conn->ksnc_cookie */
- fmb = (ksock_fmb_t *)conn->ksnc_cookie;
- kpr_fwd_start (&ksocknal_data.ksnd_router, &fmb->fmb_fwd);
+ if (rc == 0 && conn->ksnc_msg.ksm_zc_cookies[0] != 0) {
+ LASSERT(conn->ksnc_proto != &ksocknal_protocol_v1x);
- /* no slop in forwarded packets */
- LASSERT (conn->ksnc_rx_nob_left == 0);
+ lhdr = &conn->ksnc_msg.ksm_u.lnetmsg.ksnm_hdr;
+ id = &conn->ksnc_peer->ksnp_id;
- ksocknal_new_packet (conn, 0); /* on to next packet */
- return (0); /* (later) */
+ rc = conn->ksnc_proto->pro_handle_zcreq(conn,
+ conn->ksnc_msg.ksm_zc_cookies[0],
+ *ksocknal_tunables.ksnd_nonblk_zcack ||
+ le64_to_cpu(lhdr->src_nid) != id->nid);
+ }
+
+ if (rc && conn->ksnc_lnet_msg)
+ conn->ksnc_lnet_msg->msg_health_status =
+ LNET_MSG_STATUS_REMOTE_ERROR;
+ lnet_finalize(conn->ksnc_lnet_msg, rc);
+
+ if (rc != 0) {
+ ksocknal_new_packet(conn, 0);
+ ksocknal_close_conn_and_siblings (conn, rc);
+ return (-EPROTO);
+ }
+ /* Fall through */
+
+ case SOCKNAL_RX_SLOP:
+ /* starting new packet? */
+ if (ksocknal_new_packet (conn, conn->ksnc_rx_nob_left))
+ return 0; /* come back later */
+ goto again; /* try to finish reading slop now */
default:
break;
return (-EINVAL); /* keep gcc happy */
}
-ptl_err_t
-ksocknal_recv (lib_nal_t *nal, void *private, lib_msg_t *msg,
- unsigned int niov, struct iovec *iov,
- size_t offset, size_t mlen, size_t rlen)
-{
- ksock_conn_t *conn = (ksock_conn_t *)private;
-
- LASSERT (mlen <= rlen);
- LASSERT (niov <= PTL_MD_MAX_IOV);
-
- conn->ksnc_cookie = msg;
- conn->ksnc_rx_nob_wanted = mlen;
- conn->ksnc_rx_nob_left = rlen;
-
- conn->ksnc_rx_nkiov = 0;
- conn->ksnc_rx_kiov = NULL;
- conn->ksnc_rx_iov = conn->ksnc_rx_iov_space.iov;
- conn->ksnc_rx_niov =
- lib_extract_iov(PTL_MD_MAX_IOV, conn->ksnc_rx_iov,
- niov, iov, offset, mlen);
-
- LASSERT (mlen ==
- lib_iov_nob (conn->ksnc_rx_niov, conn->ksnc_rx_iov) +
- lib_kiov_nob (conn->ksnc_rx_nkiov, conn->ksnc_rx_kiov));
-
- return (PTL_OK);
-}
-
-ptl_err_t
-ksocknal_recv_pages (lib_nal_t *nal, void *private, lib_msg_t *msg,
- unsigned int niov, ptl_kiov_t *kiov,
- size_t offset, size_t mlen, size_t rlen)
+int
+ksocknal_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
+ int delayed, unsigned int niov, struct kvec *iov,
+ lnet_kiov_t *kiov, unsigned int offset, unsigned int mlen,
+ unsigned int rlen)
{
- ksock_conn_t *conn = (ksock_conn_t *)private;
+ struct ksock_conn *conn = private;
+ struct ksock_sched *sched = conn->ksnc_scheduler;
LASSERT (mlen <= rlen);
- LASSERT (niov <= PTL_MD_MAX_IOV);
-
- conn->ksnc_cookie = msg;
- conn->ksnc_rx_nob_wanted = mlen;
- conn->ksnc_rx_nob_left = rlen;
-
- conn->ksnc_rx_niov = 0;
- conn->ksnc_rx_iov = NULL;
- conn->ksnc_rx_kiov = conn->ksnc_rx_iov_space.kiov;
- conn->ksnc_rx_nkiov =
- lib_extract_kiov(PTL_MD_MAX_IOV, conn->ksnc_rx_kiov,
- niov, kiov, offset, mlen);
-
- LASSERT (mlen ==
- lib_iov_nob (conn->ksnc_rx_niov, conn->ksnc_rx_iov) +
- lib_kiov_nob (conn->ksnc_rx_nkiov, conn->ksnc_rx_kiov));
-
- return (PTL_OK);
-}
-
-static inline int
-ksocknal_sched_cansleep(ksock_sched_t *sched)
-{
- unsigned long flags;
- int rc;
+ LASSERT (niov <= LNET_MAX_IOV);
- spin_lock_irqsave(&sched->kss_lock, flags);
-
- rc = (!ksocknal_data.ksnd_shuttingdown &&
-#if SOCKNAL_ZC
- list_empty(&sched->kss_zctxdone_list) &&
-#endif
- list_empty(&sched->kss_rx_conns) &&
- list_empty(&sched->kss_tx_conns));
-
- spin_unlock_irqrestore(&sched->kss_lock, flags);
- return (rc);
-}
+ conn->ksnc_lnet_msg = msg;
+ conn->ksnc_rx_nob_wanted = mlen;
+ conn->ksnc_rx_nob_left = rlen;
-int ksocknal_scheduler (void *arg)
-{
- ksock_sched_t *sched = (ksock_sched_t *)arg;
- ksock_conn_t *conn;
- ksock_tx_t *tx;
- unsigned long flags;
- int rc;
- int nloops = 0;
- int id = sched - ksocknal_data.ksnd_schedulers;
- char name[16];
-
- snprintf (name, sizeof (name),"ksocknald_%02d", id);
- kportal_daemonize (name);
- kportal_blockallsigs ();
-
-#if (CONFIG_SMP && CPU_AFFINITY)
- id = ksocknal_sched2cpu(id);
- if (cpu_online(id)) {
- cpumask_t m;
- cpu_set(id, m);
- set_cpus_allowed(current, m);
+ if (mlen == 0 || iov != NULL) {
+ conn->ksnc_rx_nkiov = 0;
+ conn->ksnc_rx_kiov = NULL;
+ conn->ksnc_rx_iov = conn->ksnc_rx_iov_space.iov;
+ conn->ksnc_rx_niov =
+ lnet_extract_iov(LNET_MAX_IOV, conn->ksnc_rx_iov,
+ niov, iov, offset, mlen);
} else {
- CERROR ("Can't set CPU affinity for %s to %d\n", name, id);
+ conn->ksnc_rx_niov = 0;
+ conn->ksnc_rx_iov = NULL;
+ conn->ksnc_rx_kiov = conn->ksnc_rx_iov_space.kiov;
+ conn->ksnc_rx_nkiov =
+ lnet_extract_kiov(LNET_MAX_IOV, conn->ksnc_rx_kiov,
+ niov, kiov, offset, mlen);
}
-#endif /* CONFIG_SMP && CPU_AFFINITY */
-
- spin_lock_irqsave (&sched->kss_lock, flags);
- while (!ksocknal_data.ksnd_shuttingdown) {
- int did_something = 0;
-
- /* Ensure I progress everything semi-fairly */
-
- if (!list_empty (&sched->kss_rx_conns)) {
- conn = list_entry(sched->kss_rx_conns.next,
- ksock_conn_t, ksnc_rx_list);
- list_del(&conn->ksnc_rx_list);
-
- LASSERT(conn->ksnc_rx_scheduled);
- LASSERT(conn->ksnc_rx_ready);
-
- /* clear rx_ready in case receive isn't complete.
- * Do it BEFORE we call process_recv, since
- * data_ready can set it any time after we release
- * kss_lock. */
- conn->ksnc_rx_ready = 0;
- spin_unlock_irqrestore(&sched->kss_lock, flags);
-
- rc = ksocknal_process_receive(conn);
-
- spin_lock_irqsave(&sched->kss_lock, flags);
-
- /* I'm the only one that can clear this flag */
- LASSERT(conn->ksnc_rx_scheduled);
-
- /* Did process_receive get everything it wanted? */
- if (rc == 0)
- conn->ksnc_rx_ready = 1;
-
- if (conn->ksnc_rx_state == SOCKNAL_RX_FMB_SLEEP ||
- conn->ksnc_rx_state == SOCKNAL_RX_GET_FMB) {
- /* Conn blocked for a forwarding buffer.
- * It will get queued for my attention when
- * one becomes available (and it might just
- * already have been!). Meanwhile my ref
- * on it stays put. */
- } else if (conn->ksnc_rx_ready) {
- /* reschedule for rx */
- list_add_tail (&conn->ksnc_rx_list,
- &sched->kss_rx_conns);
- } else {
- conn->ksnc_rx_scheduled = 0;
- /* drop my ref */
- ksocknal_put_conn(conn);
- }
+ LASSERT (mlen ==
+ lnet_iov_nob (conn->ksnc_rx_niov, conn->ksnc_rx_iov) +
+ lnet_kiov_nob (conn->ksnc_rx_nkiov, conn->ksnc_rx_kiov));
- did_something = 1;
- }
+ LASSERT (conn->ksnc_rx_scheduled);
- if (!list_empty (&sched->kss_tx_conns)) {
- conn = list_entry(sched->kss_tx_conns.next,
- ksock_conn_t, ksnc_tx_list);
- list_del (&conn->ksnc_tx_list);
-
- LASSERT(conn->ksnc_tx_scheduled);
- LASSERT(conn->ksnc_tx_ready);
- LASSERT(!list_empty(&conn->ksnc_tx_queue));
-
- tx = list_entry(conn->ksnc_tx_queue.next,
- ksock_tx_t, tx_list);
- /* dequeue now so empty list => more to send */
- list_del(&tx->tx_list);
-
- /* Clear tx_ready in case send isn't complete. Do
- * it BEFORE we call process_transmit, since
- * write_space can set it any time after we release
- * kss_lock. */
- conn->ksnc_tx_ready = 0;
- spin_unlock_irqrestore (&sched->kss_lock, flags);
-
- rc = ksocknal_process_transmit(conn, tx);
-
- spin_lock_irqsave (&sched->kss_lock, flags);
-
- if (rc == -ENOMEM || rc == -EAGAIN) {
- /* Incomplete send: replace tx on HEAD of tx_queue */
- list_add (&tx->tx_list, &conn->ksnc_tx_queue);
- } else {
- /* Complete send; assume space for more */
- conn->ksnc_tx_ready = 1;
- }
+ spin_lock_bh(&sched->kss_lock);
- if (rc == -ENOMEM) {
- /* Do nothing; after a short timeout, this
- * conn will be reposted on kss_tx_conns. */
- } else if (conn->ksnc_tx_ready &&
- !list_empty (&conn->ksnc_tx_queue)) {
- /* reschedule for tx */
- list_add_tail (&conn->ksnc_tx_list,
- &sched->kss_tx_conns);
- } else {
- conn->ksnc_tx_scheduled = 0;
- /* drop my ref */
- ksocknal_put_conn (conn);
- }
-
- did_something = 1;
- }
-#if SOCKNAL_ZC
- if (!list_empty (&sched->kss_zctxdone_list)) {
- ksock_tx_t *tx =
- list_entry(sched->kss_zctxdone_list.next,
- ksock_tx_t, tx_list);
- did_something = 1;
+ switch (conn->ksnc_rx_state) {
+ case SOCKNAL_RX_PARSE_WAIT:
+ list_add_tail(&conn->ksnc_rx_list, &sched->kss_rx_conns);
+ wake_up(&sched->kss_waitq);
+ LASSERT(conn->ksnc_rx_ready);
+ break;
+
+ case SOCKNAL_RX_PARSE:
+ /* scheduler hasn't noticed I'm parsing yet */
+ break;
+ }
- list_del (&tx->tx_list);
- spin_unlock_irqrestore (&sched->kss_lock, flags);
+ conn->ksnc_rx_state = SOCKNAL_RX_LNET_PAYLOAD;
- ksocknal_tx_done (tx, 1);
+ spin_unlock_bh(&sched->kss_lock);
+ ksocknal_conn_decref(conn);
+ return 0;
+}
- spin_lock_irqsave (&sched->kss_lock, flags);
- }
-#endif
- if (!did_something || /* nothing to do */
- ++nloops == SOCKNAL_RESCHED) { /* hogging CPU? */
- spin_unlock_irqrestore (&sched->kss_lock, flags);
+static inline int
+ksocknal_sched_cansleep(struct ksock_sched *sched)
+{
+ int rc;
- nloops = 0;
+ spin_lock_bh(&sched->kss_lock);
- if (!did_something) { /* wait for something to do */
- rc = wait_event_interruptible (sched->kss_waitq,
- !ksocknal_sched_cansleep(sched));
- LASSERT (rc == 0);
- } else
- our_cond_resched();
+ rc = (!ksocknal_data.ksnd_shuttingdown &&
+ list_empty(&sched->kss_rx_conns) &&
+ list_empty(&sched->kss_tx_conns));
- spin_lock_irqsave (&sched->kss_lock, flags);
- }
- }
+ spin_unlock_bh(&sched->kss_lock);
+ return rc;
+}
- spin_unlock_irqrestore (&sched->kss_lock, flags);
- ksocknal_thread_fini ();
- return (0);
+int ksocknal_scheduler(void *arg)
+{
+ struct ksock_sched *sched;
+ struct ksock_conn *conn;
+ struct ksock_tx *tx;
+ int rc;
+ int nloops = 0;
+ long id = (long)arg;
+ struct page **rx_scratch_pgs;
+ struct kvec *scratch_iov;
+
+ sched = ksocknal_data.ksnd_schedulers[KSOCK_THREAD_CPT(id)];
+
+ LIBCFS_CPT_ALLOC(rx_scratch_pgs, lnet_cpt_table(), sched->kss_cpt,
+ sizeof(*rx_scratch_pgs) * LNET_MAX_IOV);
+ if (!rx_scratch_pgs) {
+ CERROR("Unable to allocate scratch pages\n");
+ return -ENOMEM;
+ }
+
+ LIBCFS_CPT_ALLOC(scratch_iov, lnet_cpt_table(), sched->kss_cpt,
+ sizeof(*scratch_iov) * LNET_MAX_IOV);
+ if (!scratch_iov) {
+ CERROR("Unable to allocate scratch iov\n");
+ return -ENOMEM;
+ }
+
+ cfs_block_allsigs();
+
+ rc = cfs_cpt_bind(lnet_cpt_table(), sched->kss_cpt);
+ if (rc != 0) {
+ CWARN("Can't set CPU partition affinity to %d: %d\n",
+ sched->kss_cpt, rc);
+ }
+
+ spin_lock_bh(&sched->kss_lock);
+
+ while (!ksocknal_data.ksnd_shuttingdown) {
+ int did_something = 0;
+
+ /* Ensure I progress everything semi-fairly */
+
+ if (!list_empty(&sched->kss_rx_conns)) {
+ conn = list_entry(sched->kss_rx_conns.next,
+ struct ksock_conn, ksnc_rx_list);
+ list_del(&conn->ksnc_rx_list);
+
+ LASSERT(conn->ksnc_rx_scheduled);
+ LASSERT(conn->ksnc_rx_ready);
+
+ /* clear rx_ready in case receive isn't complete.
+ * Do it BEFORE we call process_recv, since
+ * data_ready can set it any time after we release
+ * kss_lock. */
+ conn->ksnc_rx_ready = 0;
+ spin_unlock_bh(&sched->kss_lock);
+
+ rc = ksocknal_process_receive(conn, rx_scratch_pgs,
+ scratch_iov);
+
+ spin_lock_bh(&sched->kss_lock);
+
+ /* I'm the only one that can clear this flag */
+ LASSERT(conn->ksnc_rx_scheduled);
+
+ /* Did process_receive get everything it wanted? */
+ if (rc == 0)
+ conn->ksnc_rx_ready = 1;
+
+ if (conn->ksnc_rx_state == SOCKNAL_RX_PARSE) {
+ /* Conn blocked waiting for ksocknal_recv()
+ * I change its state (under lock) to signal
+ * it can be rescheduled */
+ conn->ksnc_rx_state = SOCKNAL_RX_PARSE_WAIT;
+ } else if (conn->ksnc_rx_ready) {
+ /* reschedule for rx */
+ list_add_tail(&conn->ksnc_rx_list,
+ &sched->kss_rx_conns);
+ } else {
+ conn->ksnc_rx_scheduled = 0;
+ /* drop my ref */
+ ksocknal_conn_decref(conn);
+ }
+
+ did_something = 1;
+ }
+
+ if (!list_empty(&sched->kss_tx_conns)) {
+ LIST_HEAD(zlist);
+
+ if (!list_empty(&sched->kss_zombie_noop_txs)) {
+ list_add(&zlist,
+ &sched->kss_zombie_noop_txs);
+ list_del_init(&sched->kss_zombie_noop_txs);
+ }
+
+ conn = list_entry(sched->kss_tx_conns.next,
+ struct ksock_conn, ksnc_tx_list);
+ list_del(&conn->ksnc_tx_list);
+
+ LASSERT(conn->ksnc_tx_scheduled);
+ LASSERT(conn->ksnc_tx_ready);
+ LASSERT(!list_empty(&conn->ksnc_tx_queue));
+
+ tx = list_entry(conn->ksnc_tx_queue.next,
+ struct ksock_tx, tx_list);
+
+ if (conn->ksnc_tx_carrier == tx)
+ ksocknal_next_tx_carrier(conn);
+
+ /* dequeue now so empty list => more to send */
+ list_del(&tx->tx_list);
+
+ /* Clear tx_ready in case send isn't complete. Do
+ * it BEFORE we call process_transmit, since
+ * write_space can set it any time after we release
+ * kss_lock. */
+ conn->ksnc_tx_ready = 0;
+ spin_unlock_bh(&sched->kss_lock);
+
+ if (!list_empty(&zlist)) {
+ /* free zombie noop txs, it's fast because
+ * noop txs are just put in freelist */
+ ksocknal_txlist_done(NULL, &zlist, 0);
+ }
+
+ rc = ksocknal_process_transmit(conn, tx, scratch_iov);
+
+ if (rc == -ENOMEM || rc == -EAGAIN) {
+ /* Incomplete send: replace tx on HEAD of tx_queue */
+ spin_lock_bh(&sched->kss_lock);
+ list_add(&tx->tx_list,
+ &conn->ksnc_tx_queue);
+ } else {
+ /* Complete send; tx -ref */
+ ksocknal_tx_decref(tx);
+
+ spin_lock_bh(&sched->kss_lock);
+ /* assume space for more */
+ conn->ksnc_tx_ready = 1;
+ }
+
+ if (rc == -ENOMEM) {
+ /* Do nothing; after a short timeout, this
+ * conn will be reposted on kss_tx_conns. */
+ } else if (conn->ksnc_tx_ready &&
+ !list_empty(&conn->ksnc_tx_queue)) {
+ /* reschedule for tx */
+ list_add_tail(&conn->ksnc_tx_list,
+ &sched->kss_tx_conns);
+ } else {
+ conn->ksnc_tx_scheduled = 0;
+ /* drop my ref */
+ ksocknal_conn_decref(conn);
+ }
+
+ did_something = 1;
+ }
+ if (!did_something || /* nothing to do */
+ ++nloops == SOCKNAL_RESCHED) { /* hogging CPU? */
+ spin_unlock_bh(&sched->kss_lock);
+
+ nloops = 0;
+
+ if (!did_something) { /* wait for something to do */
+ rc = wait_event_interruptible_exclusive(
+ sched->kss_waitq,
+ !ksocknal_sched_cansleep(sched));
+ LASSERT (rc == 0);
+ } else {
+ cond_resched();
+ }
+
+ spin_lock_bh(&sched->kss_lock);
+ }
+ }
+
+ spin_unlock_bh(&sched->kss_lock);
+ LIBCFS_FREE(rx_scratch_pgs, sizeof(*rx_scratch_pgs) *
+ LNET_MAX_IOV);
+ LIBCFS_FREE(scratch_iov, sizeof(*scratch_iov) *
+ LNET_MAX_IOV);
+ ksocknal_thread_fini();
+ return 0;
}
/*
* Add connection to kss_rx_conns of scheduler
* and wakeup the scheduler.
*/
-void ksocknal_read_callback (ksock_conn_t *conn)
+void ksocknal_read_callback(struct ksock_conn *conn)
{
- ksock_sched_t *sched;
- unsigned long flags;
- ENTRY;
+ struct ksock_sched *sched;
+ ENTRY;
- sched = conn->ksnc_scheduler;
+ sched = conn->ksnc_scheduler;
- spin_lock_irqsave (&sched->kss_lock, flags);
+ spin_lock_bh(&sched->kss_lock);
- conn->ksnc_rx_ready = 1;
+ conn->ksnc_rx_ready = 1;
- if (!conn->ksnc_rx_scheduled) { /* not being progressed */
- list_add_tail(&conn->ksnc_rx_list,
- &sched->kss_rx_conns);
- conn->ksnc_rx_scheduled = 1;
- /* extra ref for scheduler */
- atomic_inc (&conn->ksnc_refcount);
+ if (!conn->ksnc_rx_scheduled) { /* not being progressed */
+ list_add_tail(&conn->ksnc_rx_list,
+ &sched->kss_rx_conns);
+ conn->ksnc_rx_scheduled = 1;
+ /* extra ref for scheduler */
+ ksocknal_conn_addref(conn);
- cfs_waitq_signal (&sched->kss_waitq);
- }
- spin_unlock_irqrestore (&sched->kss_lock, flags);
+ wake_up (&sched->kss_waitq);
+ }
+ spin_unlock_bh(&sched->kss_lock);
- EXIT;
-}
+ EXIT;
+}
/*
* Add connection to kss_tx_conns of scheduler
* and wakeup the scheduler.
*/
-void ksocknal_write_callback (ksock_conn_t *conn)
-{
- ksock_sched_t *sched;
- unsigned long flags;
- ENTRY;
-
- sched = conn->ksnc_scheduler;
+void ksocknal_write_callback(struct ksock_conn *conn)
+{
+ struct ksock_sched *sched;
+ ENTRY;
- spin_lock_irqsave (&sched->kss_lock, flags);
+ sched = conn->ksnc_scheduler;
- conn->ksnc_tx_ready = 1;
+ spin_lock_bh(&sched->kss_lock);
- if (!conn->ksnc_tx_scheduled && // not being progressed
- !list_empty(&conn->ksnc_tx_queue)){//packets to send
- list_add_tail (&conn->ksnc_tx_list,
- &sched->kss_tx_conns);
- conn->ksnc_tx_scheduled = 1;
- /* extra ref for scheduler */
- atomic_inc (&conn->ksnc_refcount);
+ conn->ksnc_tx_ready = 1;
- cfs_waitq_signal (&sched->kss_waitq);
- }
+ if (!conn->ksnc_tx_scheduled && /* not being progressed */
+ !list_empty(&conn->ksnc_tx_queue)) { /* packets to send */
+ list_add_tail(&conn->ksnc_tx_list, &sched->kss_tx_conns);
+ conn->ksnc_tx_scheduled = 1;
+ /* extra ref for scheduler */
+ ksocknal_conn_addref(conn);
- spin_unlock_irqrestore (&sched->kss_lock, flags);
+ wake_up(&sched->kss_waitq);
+ }
- EXIT;
-}
+ spin_unlock_bh(&sched->kss_lock);
-int
-ksocknal_sock_write (struct socket *sock, void *buffer, int nob)
-{
- return ksocknal_lib_sock_write(sock, buffer, nob);
+ EXIT;
}
-int
-ksocknal_sock_read (struct socket *sock, void *buffer, int nob)
+static struct ksock_proto *
+ksocknal_parse_proto_version (struct ksock_hello_msg *hello)
{
- return ksocknal_lib_sock_read(sock, buffer, nob);
-}
+ __u32 version = 0;
-int
-ksocknal_send_hello (ksock_conn_t *conn, __u32 *ipaddrs, int nipaddrs)
-{
- /* CAVEAT EMPTOR: this byte flips 'ipaddrs' */
- struct socket *sock = conn->ksnc_sock;
- ptl_hdr_t hdr;
- ptl_magicversion_t *hmv = (ptl_magicversion_t *)&hdr.dest_nid;
- int i;
- int rc;
-
- LASSERT (conn->ksnc_type != SOCKNAL_CONN_NONE);
- LASSERT (nipaddrs <= SOCKNAL_MAX_INTERFACES);
-
- /* No need for getconnsock/putconnsock */
- LASSERT (!conn->ksnc_closing);
-
- LASSERT (sizeof (*hmv) == sizeof (hdr.dest_nid));
- hmv->magic = cpu_to_le32 (PORTALS_PROTO_MAGIC);
- hmv->version_major = cpu_to_le16 (PORTALS_PROTO_VERSION_MAJOR);
- hmv->version_minor = cpu_to_le16 (PORTALS_PROTO_VERSION_MINOR);
-
- hdr.src_nid = cpu_to_le64 (ksocknal_lib.libnal_ni.ni_pid.nid);
- hdr.type = cpu_to_le32 (PTL_MSG_HELLO);
- hdr.payload_length = cpu_to_le32 (nipaddrs * sizeof(*ipaddrs));
-
- hdr.msg.hello.type = cpu_to_le32 (conn->ksnc_type);
- hdr.msg.hello.incarnation =
- cpu_to_le64 (ksocknal_data.ksnd_incarnation);
-
- /* Receiver is eager */
- rc = ksocknal_sock_write (sock, &hdr, sizeof(hdr));
- if (rc != 0) {
- CERROR ("Error %d sending HELLO hdr to %u.%u.%u.%u/%d\n",
- rc, HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
- return (rc);
+ if (hello->kshm_magic == LNET_PROTO_MAGIC)
+ version = hello->kshm_version;
+ else if (hello->kshm_magic == __swab32(LNET_PROTO_MAGIC))
+ version = __swab32(hello->kshm_version);
+
+ if (version != 0) {
+#if SOCKNAL_VERSION_DEBUG
+ if (*ksocknal_tunables.ksnd_protocol == 1)
+ return NULL;
+
+ if (*ksocknal_tunables.ksnd_protocol == 2 &&
+ version == KSOCK_PROTO_V3)
+ return NULL;
+#endif
+ if (version == KSOCK_PROTO_V2)
+ return &ksocknal_protocol_v2x;
+
+ if (version == KSOCK_PROTO_V3)
+ return &ksocknal_protocol_v3x;
+
+ return NULL;
}
-
- if (nipaddrs == 0)
- return (0);
-
- for (i = 0; i < nipaddrs; i++) {
- ipaddrs[i] = __cpu_to_le32 (ipaddrs[i]);
+
+ if (hello->kshm_magic == le32_to_cpu(LNET_PROTO_TCP_MAGIC)) {
+ struct lnet_magicversion *hmv;
+
+ BUILD_BUG_ON(sizeof(struct lnet_magicversion) !=
+ offsetof(struct ksock_hello_msg, kshm_src_nid));
+
+ hmv = (struct lnet_magicversion *)hello;
+
+ if (hmv->version_major == cpu_to_le16 (KSOCK_PROTO_V1_MAJOR) &&
+ hmv->version_minor == cpu_to_le16 (KSOCK_PROTO_V1_MINOR))
+ return &ksocknal_protocol_v1x;
}
- rc = ksocknal_sock_write (sock, ipaddrs, nipaddrs * sizeof(*ipaddrs));
- if (rc != 0)
- CERROR ("Error %d sending HELLO payload (%d)"
- " to %u.%u.%u.%u/%d\n", rc, nipaddrs,
- HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
- return (rc);
+ return NULL;
}
int
+ksocknal_send_hello(struct lnet_ni *ni, struct ksock_conn *conn,
+ lnet_nid_t peer_nid, struct ksock_hello_msg *hello)
+{
+ /* CAVEAT EMPTOR: this byte flips 'ipaddrs' */
+ struct ksock_net *net = (struct ksock_net *)ni->ni_data;
+
+ LASSERT(hello->kshm_nips <= LNET_INTERFACES_NUM);
+
+ /* rely on caller to hold a ref on socket so it wouldn't disappear */
+ LASSERT(conn->ksnc_proto != NULL);
+
+ hello->kshm_src_nid = ni->ni_nid;
+ hello->kshm_dst_nid = peer_nid;
+ hello->kshm_src_pid = the_lnet.ln_pid;
+
+ hello->kshm_src_incarnation = net->ksnn_incarnation;
+ hello->kshm_ctype = conn->ksnc_type;
+
+ return conn->ksnc_proto->pro_send_hello(conn, hello);
+}
+
+static int
ksocknal_invert_type(int type)
{
switch (type)
{
- case SOCKNAL_CONN_ANY:
- case SOCKNAL_CONN_CONTROL:
+ case SOCKLND_CONN_ANY:
+ case SOCKLND_CONN_CONTROL:
return (type);
- case SOCKNAL_CONN_BULK_IN:
- return SOCKNAL_CONN_BULK_OUT;
- case SOCKNAL_CONN_BULK_OUT:
- return SOCKNAL_CONN_BULK_IN;
+ case SOCKLND_CONN_BULK_IN:
+ return SOCKLND_CONN_BULK_OUT;
+ case SOCKLND_CONN_BULK_OUT:
+ return SOCKLND_CONN_BULK_IN;
default:
- return (SOCKNAL_CONN_NONE);
+ return (SOCKLND_CONN_NONE);
}
}
int
-ksocknal_recv_hello (ksock_conn_t *conn, ptl_nid_t *nid,
- __u64 *incarnation, __u32 *ipaddrs)
+ksocknal_recv_hello(struct lnet_ni *ni, struct ksock_conn *conn,
+ struct ksock_hello_msg *hello,
+ struct lnet_process_id *peerid,
+ __u64 *incarnation)
{
- struct socket *sock = conn->ksnc_sock;
- int rc;
- int nips;
- int i;
- int type;
- ptl_hdr_t hdr;
- ptl_magicversion_t *hmv;
- char ipbuf[PTL_NALFMT_SIZE];
-
- hmv = (ptl_magicversion_t *)&hdr.dest_nid;
- LASSERT (sizeof (*hmv) == sizeof (hdr.dest_nid));
-
- rc = ksocknal_sock_read (sock, hmv, sizeof (*hmv));
+ /* Return < 0 fatal error
+ * 0 success
+ * EALREADY lost connection race
+ * EPROTO protocol version mismatch
+ */
+ struct socket *sock = conn->ksnc_sock;
+ int active = (conn->ksnc_proto != NULL);
+ int timeout;
+ int proto_match;
+ int rc;
+ struct ksock_proto *proto;
+ struct lnet_process_id recv_id;
+
+ /* socket type set on active connections - not set on passive */
+ LASSERT(!active == !(conn->ksnc_type != SOCKLND_CONN_NONE));
+
+ timeout = active ? lnet_get_lnd_timeout() :
+ lnet_acceptor_timeout();
+
+ rc = lnet_sock_read(sock, &hello->kshm_magic,
+ sizeof(hello->kshm_magic), timeout);
if (rc != 0) {
- CERROR ("Error %d reading HELLO from %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- return (rc);
+ CERROR("Error %d reading HELLO from %pI4h\n",
+ rc, &conn->ksnc_ipaddr);
+ LASSERT (rc < 0);
+ return rc;
}
- if (hmv->magic != le32_to_cpu (PORTALS_PROTO_MAGIC)) {
- CERROR ("Bad magic %#08x (%#08x expected) from %u.%u.%u.%u\n",
- __cpu_to_le32 (hmv->magic), PORTALS_PROTO_MAGIC,
- HIPQUAD(conn->ksnc_ipaddr));
- return (-EPROTO);
+ if (hello->kshm_magic != LNET_PROTO_MAGIC &&
+ hello->kshm_magic != __swab32(LNET_PROTO_MAGIC) &&
+ hello->kshm_magic != le32_to_cpu (LNET_PROTO_TCP_MAGIC)) {
+ /* Unexpected magic! */
+ CERROR ("Bad magic(1) %#08x (%#08x expected) from "
+ "%pI4h\n", __cpu_to_le32 (hello->kshm_magic),
+ LNET_PROTO_TCP_MAGIC, &conn->ksnc_ipaddr);
+ return -EPROTO;
}
- if (hmv->version_major != cpu_to_le16 (PORTALS_PROTO_VERSION_MAJOR) ||
- hmv->version_minor != cpu_to_le16 (PORTALS_PROTO_VERSION_MINOR)) {
- CERROR ("Incompatible protocol version %d.%d (%d.%d expected)"
- " from %u.%u.%u.%u\n",
- le16_to_cpu (hmv->version_major),
- le16_to_cpu (hmv->version_minor),
- PORTALS_PROTO_VERSION_MAJOR,
- PORTALS_PROTO_VERSION_MINOR,
- HIPQUAD(conn->ksnc_ipaddr));
- return (-EPROTO);
+ rc = lnet_sock_read(sock, &hello->kshm_version,
+ sizeof(hello->kshm_version), timeout);
+ if (rc != 0) {
+ CERROR("Error %d reading HELLO from %pI4h\n",
+ rc, &conn->ksnc_ipaddr);
+ LASSERT(rc < 0);
+ return rc;
+ }
+
+ proto = ksocknal_parse_proto_version(hello);
+ if (proto == NULL) {
+ if (!active) {
+ /* unknown protocol from peer_ni, tell peer_ni my protocol */
+ conn->ksnc_proto = &ksocknal_protocol_v3x;
+#if SOCKNAL_VERSION_DEBUG
+ if (*ksocknal_tunables.ksnd_protocol == 2)
+ conn->ksnc_proto = &ksocknal_protocol_v2x;
+ else if (*ksocknal_tunables.ksnd_protocol == 1)
+ conn->ksnc_proto = &ksocknal_protocol_v1x;
+#endif
+ hello->kshm_nips = 0;
+ ksocknal_send_hello(ni, conn, ni->ni_nid, hello);
+ }
+
+ CERROR("Unknown protocol version (%d.x expected) from %pI4h\n",
+ conn->ksnc_proto->pro_version, &conn->ksnc_ipaddr);
+
+ return -EPROTO;
}
-#if (PORTALS_PROTO_VERSION_MAJOR != 1)
-# error "This code only understands protocol version 1.x"
-#endif
- /* version 1 sends magic/version as the dest_nid of a 'hello'
- * header, followed by payload full of interface IP addresses.
- * Read the rest of it in now... */
+ proto_match = (conn->ksnc_proto == proto);
+ conn->ksnc_proto = proto;
- rc = ksocknal_sock_read (sock, hmv + 1, sizeof (hdr) - sizeof (*hmv));
+ /* receive the rest of hello message anyway */
+ rc = conn->ksnc_proto->pro_recv_hello(conn, hello, timeout);
if (rc != 0) {
- CERROR ("Error %d reading rest of HELLO hdr from %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- return (rc);
+ CERROR("Error %d reading or checking hello from from %pI4h\n",
+ rc, &conn->ksnc_ipaddr);
+ LASSERT (rc < 0);
+ return rc;
}
- /* ...and check we got what we expected */
- if (hdr.type != cpu_to_le32 (PTL_MSG_HELLO)) {
- CERROR ("Expecting a HELLO hdr,"
- " but got type %d from %u.%u.%u.%u\n",
- le32_to_cpu (hdr.type),
- HIPQUAD(conn->ksnc_ipaddr));
- return (-EPROTO);
- }
+ *incarnation = hello->kshm_src_incarnation;
- if (le64_to_cpu(hdr.src_nid) == PTL_NID_ANY) {
- CERROR("Expecting a HELLO hdr with a NID, but got PTL_NID_ANY"
- "from %u.%u.%u.%u\n", HIPQUAD(conn->ksnc_ipaddr));
- return (-EPROTO);
- }
+ if (hello->kshm_src_nid == LNET_NID_ANY) {
+ CERROR("Expecting a HELLO hdr with a NID, but got LNET_NID_ANY from %pI4h\n",
+ &conn->ksnc_ipaddr);
+ return -EPROTO;
+ }
- if (*nid == PTL_NID_ANY) { /* don't know peer's nid yet */
- *nid = le64_to_cpu(hdr.src_nid);
- } else if (*nid != le64_to_cpu (hdr.src_nid)) {
- LCONSOLE_ERROR("Connected successfully to nid "LPX64" on host "
- "%u.%u.%u.%u, but they claimed they were nid "
- LPX64" (%s); please check your Lustre "
- "configuration.\n",
- *nid, HIPQUAD(conn->ksnc_ipaddr),
- le64_to_cpu(hdr.src_nid),
- portals_nid2str(SOCKNAL,
- le64_to_cpu(hdr.src_nid),
- ipbuf));
-
- CERROR ("Connected to nid "LPX64"@%u.%u.%u.%u "
- "but expecting "LPX64"\n",
- le64_to_cpu (hdr.src_nid),
- HIPQUAD(conn->ksnc_ipaddr), *nid);
- return (-EPROTO);
- }
+ if (!active &&
+ conn->ksnc_port > LNET_ACCEPTOR_MAX_RESERVED_PORT) {
+ /* Userspace NAL assigns peer_ni process ID from socket */
+ recv_id.pid = conn->ksnc_port | LNET_PID_USERFLAG;
+ recv_id.nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), conn->ksnc_ipaddr);
+ } else {
+ recv_id.nid = hello->kshm_src_nid;
+ recv_id.pid = hello->kshm_src_pid;
+ }
+
+ if (!active) {
+ *peerid = recv_id;
+
+ /* peer_ni determines type */
+ conn->ksnc_type = ksocknal_invert_type(hello->kshm_ctype);
+ if (conn->ksnc_type == SOCKLND_CONN_NONE) {
+ CERROR("Unexpected type %d from %s ip %pI4h\n",
+ hello->kshm_ctype, libcfs_id2str(*peerid),
+ &conn->ksnc_ipaddr);
+ return -EPROTO;
+ }
+ return 0;
+ }
+
+ if (peerid->pid != recv_id.pid ||
+ peerid->nid != recv_id.nid) {
+ LCONSOLE_ERROR_MSG(0x130, "Connected successfully to %s on host"
+ " %pI4h, but they claimed they were "
+ "%s; please check your Lustre "
+ "configuration.\n",
+ libcfs_id2str(*peerid),
+ &conn->ksnc_ipaddr,
+ libcfs_id2str(recv_id));
+ return -EPROTO;
+ }
+
+ if (hello->kshm_ctype == SOCKLND_CONN_NONE) {
+ /* Possible protocol mismatch or I lost the connection race */
+ return proto_match ? EALREADY : EPROTO;
+ }
+
+ if (ksocknal_invert_type(hello->kshm_ctype) != conn->ksnc_type) {
+ CERROR("Mismatched types: me %d, %s ip %pI4h %d\n",
+ conn->ksnc_type, libcfs_id2str(*peerid),
+ &conn->ksnc_ipaddr,
+ hello->kshm_ctype);
+ return -EPROTO;
+ }
+ return 0;
+}
- type = __le32_to_cpu(hdr.msg.hello.type);
+static int
+ksocknal_connect(struct ksock_route *route)
+{
+ LIST_HEAD(zombies);
+ struct ksock_peer_ni *peer_ni = route->ksnr_peer;
+ int type;
+ int wanted;
+ struct socket *sock;
+ time64_t deadline;
+ int retry_later = 0;
+ int rc = 0;
- if (conn->ksnc_type == SOCKNAL_CONN_NONE) {
- /* I've accepted this connection; peer determines type */
- conn->ksnc_type = ksocknal_invert_type(type);
- if (conn->ksnc_type == SOCKNAL_CONN_NONE) {
- CERROR ("Unexpected type %d from "LPX64"@%u.%u.%u.%u\n",
- type, *nid, HIPQUAD(conn->ksnc_ipaddr));
- return (-EPROTO);
+ deadline = ktime_get_seconds() + lnet_get_lnd_timeout();
+
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
+
+ LASSERT (route->ksnr_scheduled);
+ LASSERT (!route->ksnr_connecting);
+
+ route->ksnr_connecting = 1;
+
+ for (;;) {
+ wanted = ksocknal_route_mask() & ~route->ksnr_connected;
+
+ /* stop connecting if peer_ni/route got closed under me, or
+ * route got connected while queued */
+ if (peer_ni->ksnp_closing || route->ksnr_deleted ||
+ wanted == 0) {
+ retry_later = 0;
+ break;
}
- } else if (ksocknal_invert_type(type) != conn->ksnc_type) {
- CERROR ("Mismatched types: me %d, "LPX64"@%u.%u.%u.%u %d\n",
- conn->ksnc_type, *nid, HIPQUAD(conn->ksnc_ipaddr),
- le32_to_cpu(hdr.msg.hello.type));
- return (-EPROTO);
- }
- *incarnation = le64_to_cpu(hdr.msg.hello.incarnation);
+ /* reschedule if peer_ni is connecting to me */
+ if (peer_ni->ksnp_accepting > 0) {
+ CDEBUG(D_NET,
+ "peer_ni %s(%d) already connecting to me, retry later.\n",
+ libcfs_nid2str(peer_ni->ksnp_id.nid), peer_ni->ksnp_accepting);
+ retry_later = 1;
+ }
- nips = __le32_to_cpu (hdr.payload_length) / sizeof (__u32);
+ if (retry_later) /* needs reschedule */
+ break;
- if (nips > SOCKNAL_MAX_INTERFACES ||
- nips * sizeof(__u32) != __le32_to_cpu (hdr.payload_length)) {
- CERROR("Bad payload length %d from "LPX64"@%u.%u.%u.%u\n",
- __le32_to_cpu (hdr.payload_length),
- *nid, HIPQUAD(conn->ksnc_ipaddr));
- }
+ if ((wanted & (1 << SOCKLND_CONN_ANY)) != 0) {
+ type = SOCKLND_CONN_ANY;
+ } else if ((wanted & (1 << SOCKLND_CONN_CONTROL)) != 0) {
+ type = SOCKLND_CONN_CONTROL;
+ } else if ((wanted & (1 << SOCKLND_CONN_BULK_IN)) != 0) {
+ type = SOCKLND_CONN_BULK_IN;
+ } else {
+ LASSERT ((wanted & (1 << SOCKLND_CONN_BULK_OUT)) != 0);
+ type = SOCKLND_CONN_BULK_OUT;
+ }
- if (nips == 0)
- return (0);
-
- rc = ksocknal_sock_read (sock, ipaddrs, nips * sizeof(*ipaddrs));
- if (rc != 0) {
- CERROR ("Error %d reading IPs from "LPX64"@%u.%u.%u.%u\n",
- rc, *nid, HIPQUAD(conn->ksnc_ipaddr));
- return (rc);
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+
+ if (ktime_get_seconds() >= deadline) {
+ rc = -ETIMEDOUT;
+ lnet_connect_console_error(rc, peer_ni->ksnp_id.nid,
+ route->ksnr_ipaddr,
+ route->ksnr_port);
+ goto failed;
+ }
+
+ rc = lnet_connect(&sock, peer_ni->ksnp_id.nid,
+ route->ksnr_myipaddr,
+ route->ksnr_ipaddr, route->ksnr_port,
+ peer_ni->ksnp_ni->ni_net_ns);
+ if (rc != 0)
+ goto failed;
+
+ rc = ksocknal_create_conn(peer_ni->ksnp_ni, route, sock, type);
+ if (rc < 0) {
+ lnet_connect_console_error(rc, peer_ni->ksnp_id.nid,
+ route->ksnr_ipaddr,
+ route->ksnr_port);
+ goto failed;
+ }
+
+ /* A +ve RC means I have to retry because I lost the connection
+ * race or I have to renegotiate protocol version */
+ retry_later = (rc != 0);
+ if (retry_later)
+ CDEBUG(D_NET, "peer_ni %s: conn race, retry later.\n",
+ libcfs_nid2str(peer_ni->ksnp_id.nid));
+
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
}
- for (i = 0; i < nips; i++) {
- ipaddrs[i] = __le32_to_cpu(ipaddrs[i]);
-
- if (ipaddrs[i] == 0) {
- CERROR("Zero IP[%d] from "LPX64"@%u.%u.%u.%u\n",
- i, *nid, HIPQUAD(conn->ksnc_ipaddr));
- return (-EPROTO);
+ route->ksnr_scheduled = 0;
+ route->ksnr_connecting = 0;
+
+ if (retry_later) {
+ /* re-queue for attention; this frees me up to handle
+ * the peer_ni's incoming connection request */
+
+ if (rc == EALREADY ||
+ (rc == 0 && peer_ni->ksnp_accepting > 0)) {
+ /* We want to introduce a delay before next
+ * attempt to connect if we lost conn race,
+ * but the race is resolved quickly usually,
+ * so min_reconnectms should be good heuristic */
+ route->ksnr_retry_interval = *ksocknal_tunables.ksnd_min_reconnectms / 1000;
+ route->ksnr_timeout = ktime_get_seconds() +
+ route->ksnr_retry_interval;
}
+
+ ksocknal_launch_connection_locked(route);
}
- return (nips);
-}
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+ return retry_later;
-int
-ksocknal_connect_peer (ksock_route_t *route, int type)
-{
- struct socket *sock;
- int rc;
- int port;
- int may_retry;
-
- /* Iterate through reserved ports. When typed connections are
- * used, we will need to bind to multiple ports, but we only know
- * this at connect time. But, by that time we've already called
- * bind() so we need a new socket. */
-
- for (port = 1023; port > 512; --port) {
-
- rc = ksocknal_lib_connect_sock(&sock, &may_retry, route, port);
-
- if (rc == 0) {
- rc = ksocknal_create_conn(route, sock, type);
- cfs_put_file(KSN_SOCK2FILE(sock));
- return rc;
+ failed:
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
+
+ route->ksnr_scheduled = 0;
+ route->ksnr_connecting = 0;
+
+ /* This is a retry rather than a new connection */
+ route->ksnr_retry_interval *= 2;
+ route->ksnr_retry_interval =
+ max_t(time64_t, route->ksnr_retry_interval,
+ *ksocknal_tunables.ksnd_min_reconnectms / 1000);
+ route->ksnr_retry_interval =
+ min_t(time64_t, route->ksnr_retry_interval,
+ *ksocknal_tunables.ksnd_max_reconnectms / 1000);
+
+ LASSERT(route->ksnr_retry_interval);
+ route->ksnr_timeout = ktime_get_seconds() + route->ksnr_retry_interval;
+
+ if (!list_empty(&peer_ni->ksnp_tx_queue) &&
+ peer_ni->ksnp_accepting == 0 &&
+ ksocknal_find_connecting_route_locked(peer_ni) == NULL) {
+ struct ksock_conn *conn;
+
+ /* ksnp_tx_queue is queued on a conn on successful
+ * connection for V1.x and V2.x */
+ if (!list_empty(&peer_ni->ksnp_conns)) {
+ conn = list_entry(peer_ni->ksnp_conns.next,
+ struct ksock_conn, ksnc_list);
+ LASSERT (conn->ksnc_proto == &ksocknal_protocol_v3x);
}
- if (!may_retry)
- return rc;
+ /* take all the blocked packets while I've got the lock and
+ * complete below... */
+ list_splice_init(&peer_ni->ksnp_tx_queue, &zombies);
}
- CERROR("Out of ports trying to bind to a reserved port\n");
- return (-EADDRINUSE);
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+
+ ksocknal_peer_failed(peer_ni);
+ ksocknal_txlist_done(peer_ni->ksnp_ni, &zombies, rc);
+ return 0;
}
-void
-ksocknal_autoconnect (ksock_route_t *route)
+/*
+ * check whether we need to create more connds.
+ * It will try to create new thread if it's necessary, @timeout can
+ * be updated if failed to create, so caller wouldn't keep try while
+ * running out of resource.
+ */
+static int
+ksocknal_connd_check_start(time64_t sec, long *timeout)
{
- CFS_LIST_HEAD (zombies);
- ksock_tx_t *tx;
- ksock_peer_t *peer;
- unsigned long flags;
- int type;
- int mask;
- int rc = 0;
-
- write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
+ char name[16];
+ int rc;
+ int total = ksocknal_data.ksnd_connd_starting +
+ ksocknal_data.ksnd_connd_running;
- for (;;) {
- if (!ksocknal_tunables.ksnd_typed_conns) {
- if ((route->ksnr_connected & (1<<SOCKNAL_CONN_ANY)) == 0)
- type = SOCKNAL_CONN_ANY;
- else
- break; /* got connected while route queued */
- } else {
- if ((route->ksnr_connected & (1<<SOCKNAL_CONN_CONTROL)) == 0)
- type = SOCKNAL_CONN_CONTROL;
- else if ((route->ksnr_connected & (1<<SOCKNAL_CONN_BULK_IN)) == 0)
- type = SOCKNAL_CONN_BULK_IN;
- else if ((route->ksnr_connected & (1<<SOCKNAL_CONN_BULK_OUT)) == 0)
- type = SOCKNAL_CONN_BULK_OUT;
- else
- break; /* got connected while route queued */
- }
+ if (unlikely(ksocknal_data.ksnd_init < SOCKNAL_INIT_ALL)) {
+ /* still in initializing */
+ return 0;
+ }
- write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
+ if (total >= *ksocknal_tunables.ksnd_nconnds_max ||
+ total > ksocknal_data.ksnd_connd_connecting + SOCKNAL_CONND_RESV) {
+ /* can't create more connd, or still have enough
+ * threads to handle more connecting */
+ return 0;
+ }
- rc = ksocknal_connect_peer (route, type);
- if (rc != 0)
- goto failed;
+ if (list_empty(&ksocknal_data.ksnd_connd_routes)) {
+ /* no pending connecting request */
+ return 0;
+ }
- write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
+ if (sec - ksocknal_data.ksnd_connd_failed_stamp <= 1) {
+ /* may run out of resource, retry later */
+ *timeout = cfs_time_seconds(1);
+ return 0;
}
- LASSERT (route->ksnr_connecting);
- route->ksnr_connecting = 0;
- write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
- return;
-
- failed:
- switch (rc) {
- /* "normal" errors */
- case -ECONNREFUSED:
- LCONSOLE_ERROR("Connection was refused by host %u.%u.%u.%u on "
- "port %d; check that Lustre is running on that "
- "node.\n",
- HIPQUAD(route->ksnr_ipaddr), route->ksnr_port);
- break;
- case -EHOSTUNREACH:
- case -ENETUNREACH:
- LCONSOLE_ERROR("Host %u.%u.%u.%u was unreachable; the network "
- "or that node may be down, or Lustre may be "
- "misconfigured.\n",
- HIPQUAD(route->ksnr_ipaddr));
- break;
- case -ETIMEDOUT:
- LCONSOLE_ERROR("Connecting to host %u.%u.%u.%u on port %d took "
- "too long; that node may be hung or "
- "experiencing high load.\n",
- HIPQUAD(route->ksnr_ipaddr), route->ksnr_port);
- break;
- /* errors that should be rare */
- case -EPROTO:
- LCONSOLE_ERROR("Protocol error connecting to host %u.%u.%u.%u "
- "on port %d: Is it running a compatible version"
- " of Lustre?\n",
- HIPQUAD(route->ksnr_ipaddr), route->ksnr_port);
- break;
- case -EADDRINUSE:
- LCONSOLE_ERROR("No privileged ports available to connect to "
- "host %u.%u.%u.%u on port %d\n",
- HIPQUAD(route->ksnr_ipaddr), route->ksnr_port);
- break;
- default:
- LCONSOLE_ERROR("Unexpected error %d connecting to "
- "host %u.%u.%u.%u on port %d\n", rc,
- HIPQUAD(route->ksnr_ipaddr), route->ksnr_port);
- break;
+ if (ksocknal_data.ksnd_connd_starting > 0) {
+ /* serialize starting to avoid flood */
+ return 0;
}
- write_lock_irqsave (&ksocknal_data.ksnd_global_lock, flags);
+ ksocknal_data.ksnd_connd_starting_stamp = sec;
+ ksocknal_data.ksnd_connd_starting++;
+ spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
- peer = route->ksnr_peer;
- LASSERT (route->ksnr_connecting);
- route->ksnr_connecting = 0;
+ /* NB: total is the next id */
+ snprintf(name, sizeof(name), "socknal_cd%02d", total);
+ rc = ksocknal_thread_start(ksocknal_connd, NULL, name);
+
+ spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
+ if (rc == 0)
+ return 1;
+
+ /* we tried ... */
+ LASSERT(ksocknal_data.ksnd_connd_starting > 0);
+ ksocknal_data.ksnd_connd_starting--;
+ ksocknal_data.ksnd_connd_failed_stamp = ktime_get_real_seconds();
+
+ return 1;
+}
+
+/*
+ * check whether current thread can exit, it will return 1 if there are too
+ * many threads and no creating in past 120 seconds.
+ * Also, this function may update @timeout to make caller come back
+ * again to recheck these conditions.
+ */
+static int
+ksocknal_connd_check_stop(time64_t sec, long *timeout)
+{
+ int val;
- /* This is a retry rather than a new connection */
- LASSERT (route->ksnr_retry_interval != 0);
- route->ksnr_timeout = cfs_time_add(cfs_time_current(),
- route->ksnr_retry_interval);
- route->ksnr_retry_interval = MIN (route->ksnr_retry_interval * 2,
- SOCKNAL_MAX_RECONNECT_INTERVAL);
-
- if (!list_empty (&peer->ksnp_tx_queue) &&
- ksocknal_find_connecting_route_locked (peer) == NULL) {
- LASSERT (list_empty (&peer->ksnp_conns));
-
- /* None of the connections that the blocked packets are
- * waiting for have been successful. Complete them now... */
- do {
- tx = list_entry (peer->ksnp_tx_queue.next,
- ksock_tx_t, tx_list);
- list_del (&tx->tx_list);
- list_add_tail (&tx->tx_list, &zombies);
- } while (!list_empty (&peer->ksnp_tx_queue));
+ if (unlikely(ksocknal_data.ksnd_init < SOCKNAL_INIT_ALL)) {
+ /* still in initializing */
+ return 0;
}
-#if 0 /* irrelevent with only eager routes */
- if (!route->ksnr_deleted) {
- /* make this route least-favourite for re-selection */
- list_del(&route->ksnr_list);
- list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
+ if (ksocknal_data.ksnd_connd_starting > 0) {
+ /* in progress of starting new thread */
+ return 0;
}
-#endif
- write_unlock_irqrestore (&ksocknal_data.ksnd_global_lock, flags);
-
- while (!list_empty (&zombies)) {
- char ipbuf[PTL_NALFMT_SIZE];
- char ipbuf2[PTL_NALFMT_SIZE];
- tx = list_entry (zombies.next, ksock_tx_t, tx_list);
-
- CERROR ("Deleting packet type %d len %d ("LPX64" %s->"LPX64" %s)\n",
- le32_to_cpu (tx->tx_hdr->type),
- le32_to_cpu (tx->tx_hdr->payload_length),
- le64_to_cpu (tx->tx_hdr->src_nid),
- portals_nid2str(SOCKNAL,
- le64_to_cpu(tx->tx_hdr->src_nid),
- ipbuf),
- le64_to_cpu (tx->tx_hdr->dest_nid),
- portals_nid2str(SOCKNAL,
- le64_to_cpu(tx->tx_hdr->src_nid),
- ipbuf2));
-
- list_del (&tx->tx_list);
- /* complete now */
- ksocknal_tx_done (tx, 0);
+
+ if (ksocknal_data.ksnd_connd_running <=
+ *ksocknal_tunables.ksnd_nconnds) { /* can't shrink */
+ return 0;
}
+
+ /* created thread in past 120 seconds? */
+ val = (int)(ksocknal_data.ksnd_connd_starting_stamp +
+ SOCKNAL_CONND_TIMEOUT - sec);
+
+ *timeout = (val > 0) ? cfs_time_seconds(val) :
+ cfs_time_seconds(SOCKNAL_CONND_TIMEOUT);
+ if (val > 0)
+ return 0;
+
+ /* no creating in past 120 seconds */
+
+ return ksocknal_data.ksnd_connd_running >
+ ksocknal_data.ksnd_connd_connecting + SOCKNAL_CONND_RESV;
+}
+
+/* Go through connd_routes queue looking for a route that we can process
+ * right now, @timeout_p can be updated if we need to come back later */
+static struct ksock_route *
+ksocknal_connd_get_route_locked(signed long *timeout_p)
+{
+ time64_t now = ktime_get_seconds();
+ struct ksock_route *route;
+
+ /* connd_routes can contain both pending and ordinary routes */
+ list_for_each_entry(route, &ksocknal_data.ksnd_connd_routes,
+ ksnr_connd_list) {
+
+ if (route->ksnr_retry_interval == 0 ||
+ now >= route->ksnr_timeout)
+ return route;
+
+ if (*timeout_p == MAX_SCHEDULE_TIMEOUT ||
+ *timeout_p > cfs_time_seconds(route->ksnr_timeout - now))
+ *timeout_p = cfs_time_seconds(route->ksnr_timeout - now);
+ }
+
+ return NULL;
}
int
-ksocknal_autoconnectd (void *arg)
+ksocknal_connd(void *arg)
{
- long id = (long)arg;
- char name[16];
- unsigned long flags;
- ksock_route_t *route;
- int rc;
+ spinlock_t *connd_lock = &ksocknal_data.ksnd_connd_lock;
+ struct ksock_connreq *cr;
+ wait_queue_entry_t wait;
+ int nloops = 0;
+ int cons_retry = 0;
- snprintf (name, sizeof (name), "ksocknal_ad%02ld", id);
- kportal_daemonize (name);
- kportal_blockallsigs ();
+ cfs_block_allsigs();
- spin_lock_irqsave (&ksocknal_data.ksnd_autoconnectd_lock, flags);
+ init_waitqueue_entry(&wait, current);
- while (!ksocknal_data.ksnd_shuttingdown) {
+ spin_lock_bh(connd_lock);
- if (!list_empty (&ksocknal_data.ksnd_autoconnectd_routes)) {
- route = list_entry (ksocknal_data.ksnd_autoconnectd_routes.next,
- ksock_route_t, ksnr_connect_list);
+ LASSERT(ksocknal_data.ksnd_connd_starting > 0);
+ ksocknal_data.ksnd_connd_starting--;
+ ksocknal_data.ksnd_connd_running++;
- list_del (&route->ksnr_connect_list);
- spin_unlock_irqrestore (&ksocknal_data.ksnd_autoconnectd_lock, flags);
+ while (!ksocknal_data.ksnd_shuttingdown) {
+ struct ksock_route *route = NULL;
+ time64_t sec = ktime_get_real_seconds();
+ long timeout = MAX_SCHEDULE_TIMEOUT;
+ int dropped_lock = 0;
- ksocknal_autoconnect (route);
- ksocknal_put_route (route);
+ if (ksocknal_connd_check_stop(sec, &timeout)) {
+ /* wakeup another one to check stop */
+ wake_up(&ksocknal_data.ksnd_connd_waitq);
+ break;
+ }
- spin_lock_irqsave(&ksocknal_data.ksnd_autoconnectd_lock,
- flags);
- continue;
+ if (ksocknal_connd_check_start(sec, &timeout)) {
+ /* created new thread */
+ dropped_lock = 1;
}
- spin_unlock_irqrestore(&ksocknal_data.ksnd_autoconnectd_lock,
- flags);
+ if (!list_empty(&ksocknal_data.ksnd_connd_connreqs)) {
+ /* Connection accepted by the listener */
+ cr = list_entry(ksocknal_data.ksnd_connd_connreqs.next,
+ struct ksock_connreq, ksncr_list);
- rc = wait_event_interruptible(ksocknal_data.ksnd_autoconnectd_waitq,
- ksocknal_data.ksnd_shuttingdown ||
- !list_empty(&ksocknal_data.ksnd_autoconnectd_routes));
+ list_del(&cr->ksncr_list);
+ spin_unlock_bh(connd_lock);
+ dropped_lock = 1;
- spin_lock_irqsave(&ksocknal_data.ksnd_autoconnectd_lock, flags);
- }
+ ksocknal_create_conn(cr->ksncr_ni, NULL,
+ cr->ksncr_sock, SOCKLND_CONN_NONE);
+ lnet_ni_decref(cr->ksncr_ni);
+ LIBCFS_FREE(cr, sizeof(*cr));
- spin_unlock_irqrestore (&ksocknal_data.ksnd_autoconnectd_lock, flags);
+ spin_lock_bh(connd_lock);
+ }
- ksocknal_thread_fini ();
- return (0);
+ /* Only handle an outgoing connection request if there
+ * is a thread left to handle incoming connections and
+ * create new connd */
+ if (ksocknal_data.ksnd_connd_connecting + SOCKNAL_CONND_RESV <
+ ksocknal_data.ksnd_connd_running) {
+ route = ksocknal_connd_get_route_locked(&timeout);
+ }
+ if (route != NULL) {
+ list_del(&route->ksnr_connd_list);
+ ksocknal_data.ksnd_connd_connecting++;
+ spin_unlock_bh(connd_lock);
+ dropped_lock = 1;
+
+ if (ksocknal_connect(route)) {
+ /* consecutive retry */
+ if (cons_retry++ > SOCKNAL_INSANITY_RECONN) {
+ CWARN("massive consecutive "
+ "re-connecting to %pI4h\n",
+ &route->ksnr_ipaddr);
+ cons_retry = 0;
+ }
+ } else {
+ cons_retry = 0;
+ }
+
+ ksocknal_route_decref(route);
+
+ spin_lock_bh(connd_lock);
+ ksocknal_data.ksnd_connd_connecting--;
+ }
+
+ if (dropped_lock) {
+ if (++nloops < SOCKNAL_RESCHED)
+ continue;
+ spin_unlock_bh(connd_lock);
+ nloops = 0;
+ cond_resched();
+ spin_lock_bh(connd_lock);
+ continue;
+ }
+
+ /* Nothing to do for 'timeout' */
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue_exclusive(&ksocknal_data.ksnd_connd_waitq, &wait);
+ spin_unlock_bh(connd_lock);
+
+ nloops = 0;
+ schedule_timeout(timeout);
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&ksocknal_data.ksnd_connd_waitq, &wait);
+ spin_lock_bh(connd_lock);
+ }
+ ksocknal_data.ksnd_connd_running--;
+ spin_unlock_bh(connd_lock);
+
+ ksocknal_thread_fini();
+ return 0;
}
-ksock_conn_t *
-ksocknal_find_timed_out_conn (ksock_peer_t *peer)
+static struct ksock_conn *
+ksocknal_find_timed_out_conn(struct ksock_peer_ni *peer_ni)
{
/* We're called with a shared lock on ksnd_global_lock */
- ksock_conn_t *conn;
- struct list_head *ctmp;
+ struct ksock_conn *conn;
+ struct list_head *ctmp;
+ struct ksock_tx *tx;
- list_for_each (ctmp, &peer->ksnp_conns) {
- conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
+ list_for_each(ctmp, &peer_ni->ksnp_conns) {
+ int error;
- /* Don't need the {get,put}connsock dance to deref ksnc_sock... */
+ conn = list_entry(ctmp, struct ksock_conn, ksnc_list);
+
+ /* Don't need the {get,put}connsock dance to deref ksnc_sock */
LASSERT (!conn->ksnc_closing);
- if (SOCK_ERROR(conn->ksnc_sock) != 0) {
- atomic_inc (&conn->ksnc_refcount);
+ error = conn->ksnc_sock->sk->sk_err;
+ if (error != 0) {
+ ksocknal_conn_addref(conn);
- switch (SOCK_ERROR(conn->ksnc_sock)) {
+ switch (error) {
case ECONNRESET:
- LCONSOLE_WARN("A connection with %u.%u.%u.%u "
- "was reset; they may have "
- "rebooted.\n",
- HIPQUAD(conn->ksnc_ipaddr));
+ CNETERR("A connection with %s "
+ "(%pI4h:%d) was reset; "
+ "it may have rebooted.\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_ipaddr,
+ conn->ksnc_port);
break;
case ETIMEDOUT:
- LCONSOLE_WARN("A connection with %u.%u.%u.%u "
- "timed out; the network or that "
- "node may be down.\n",
- HIPQUAD(conn->ksnc_ipaddr));
+ CNETERR("A connection with %s "
+ "(%pI4h:%d) timed out; the "
+ "network or node may be down.\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_ipaddr,
+ conn->ksnc_port);
break;
default:
- LCONSOLE_WARN("An unexpected network error "
- "occurred with %u.%u.%u.%u: %d.\n",
- HIPQUAD(conn->ksnc_ipaddr),
- SOCK_ERROR(conn->ksnc_sock));
+ CNETERR("An unexpected network error %d "
+ "occurred with %s "
+ "(%pI4h:%d\n", error,
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_ipaddr,
+ conn->ksnc_port);
break;
}
- /* Something (e.g. failed keepalive) set the socket error */
- CERROR ("Socket error %d: "LPX64" %p %d.%d.%d.%d\n",
- SOCK_ERROR(conn->ksnc_sock), peer->ksnp_nid,
- conn, HIPQUAD(conn->ksnc_ipaddr));
-
return (conn);
}
if (conn->ksnc_rx_started &&
- cfs_time_aftereq (cfs_time_current(),
- conn->ksnc_rx_deadline)) {
+ ktime_get_seconds() >= conn->ksnc_rx_deadline) {
/* Timed out incomplete incoming message */
- atomic_inc (&conn->ksnc_refcount);
- LCONSOLE_ERROR("A timeout occurred receiving data from "
- "%u.%u.%u.%u; the network or that node "
- "may be down.\n",
- HIPQUAD(conn->ksnc_ipaddr));
- CERROR ("Timed out RX from "LPX64" %p %d.%d.%d.%d\n",
- peer->ksnp_nid,conn,HIPQUAD(conn->ksnc_ipaddr));
+ ksocknal_conn_addref(conn);
+ CNETERR("Timeout receiving from %s (%pI4h:%d), "
+ "state %d wanted %d left %d\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_ipaddr,
+ conn->ksnc_port,
+ conn->ksnc_rx_state,
+ conn->ksnc_rx_nob_wanted,
+ conn->ksnc_rx_nob_left);
return (conn);
}
- if ((!list_empty (&conn->ksnc_tx_queue) ||
- SOCK_WMEM_QUEUED(conn->ksnc_sock) != 0) &&
- cfs_time_aftereq (cfs_time_current(),
- conn->ksnc_tx_deadline)) {
+ if ((!list_empty(&conn->ksnc_tx_queue) ||
+ conn->ksnc_sock->sk->sk_wmem_queued != 0) &&
+ ktime_get_seconds() >= conn->ksnc_tx_deadline) {
/* Timed out messages queued for sending or
* buffered in the socket's send buffer */
- atomic_inc (&conn->ksnc_refcount);
- LCONSOLE_ERROR("A timeout occurred sending data to "
- "%u.%u.%u.%u; the network or that node "
- "may be down.\n",
- HIPQUAD(conn->ksnc_ipaddr));
- CERROR ("Timed out TX to "LPX64" %s%d %p %d.%d.%d.%d\n",
- peer->ksnp_nid,
- list_empty (&conn->ksnc_tx_queue) ? "" : "Q ",
- SOCK_WMEM_QUEUED(conn->ksnc_sock), conn,
- HIPQUAD(conn->ksnc_ipaddr));
+ ksocknal_conn_addref(conn);
+ list_for_each_entry(tx, &conn->ksnc_tx_queue,
+ tx_list)
+ tx->tx_hstatus =
+ LNET_MSG_STATUS_LOCAL_TIMEOUT;
+ CNETERR("Timeout sending data to %s (%pI4h:%d) "
+ "the network or that node may be down.\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_ipaddr, conn->ksnc_port);
return (conn);
}
}
return (NULL);
}
-void
-ksocknal_check_peer_timeouts (int idx)
+static inline void
+ksocknal_flush_stale_txs(struct ksock_peer_ni *peer_ni)
+{
+ struct ksock_tx *tx;
+ LIST_HEAD(stale_txs);
+
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
+
+ while (!list_empty(&peer_ni->ksnp_tx_queue)) {
+ tx = list_entry(peer_ni->ksnp_tx_queue.next,
+ struct ksock_tx, tx_list);
+
+ if (ktime_get_seconds() < tx->tx_deadline)
+ break;
+
+ tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_TIMEOUT;
+
+ list_move_tail(&tx->tx_list, &stale_txs);
+ }
+
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+
+ ksocknal_txlist_done(peer_ni->ksnp_ni, &stale_txs, -ETIMEDOUT);
+}
+
+static int
+ksocknal_send_keepalive_locked(struct ksock_peer_ni *peer_ni)
+__must_hold(&ksocknal_data.ksnd_global_lock)
+{
+ struct ksock_sched *sched;
+ struct ksock_conn *conn;
+ struct ksock_tx *tx;
+
+ /* last_alive will be updated by create_conn */
+ if (list_empty(&peer_ni->ksnp_conns))
+ return 0;
+
+ if (peer_ni->ksnp_proto != &ksocknal_protocol_v3x)
+ return 0;
+
+ if (*ksocknal_tunables.ksnd_keepalive <= 0 ||
+ ktime_get_seconds() < peer_ni->ksnp_last_alive +
+ *ksocknal_tunables.ksnd_keepalive)
+ return 0;
+
+ if (ktime_get_seconds() < peer_ni->ksnp_send_keepalive)
+ return 0;
+
+ /* retry 10 secs later, so we wouldn't put pressure
+ * on this peer_ni if we failed to send keepalive this time */
+ peer_ni->ksnp_send_keepalive = ktime_get_seconds() + 10;
+
+ conn = ksocknal_find_conn_locked(peer_ni, NULL, 1);
+ if (conn != NULL) {
+ sched = conn->ksnc_scheduler;
+
+ spin_lock_bh(&sched->kss_lock);
+ if (!list_empty(&conn->ksnc_tx_queue)) {
+ spin_unlock_bh(&sched->kss_lock);
+ /* there is an queued ACK, don't need keepalive */
+ return 0;
+ }
+
+ spin_unlock_bh(&sched->kss_lock);
+ }
+
+ read_unlock(&ksocknal_data.ksnd_global_lock);
+
+ /* cookie = 1 is reserved for keepalive PING */
+ tx = ksocknal_alloc_tx_noop(1, 1);
+ if (tx == NULL) {
+ read_lock(&ksocknal_data.ksnd_global_lock);
+ return -ENOMEM;
+ }
+
+ if (ksocknal_launch_packet(peer_ni->ksnp_ni, tx, peer_ni->ksnp_id) == 0) {
+ read_lock(&ksocknal_data.ksnd_global_lock);
+ return 1;
+ }
+
+ ksocknal_free_tx(tx);
+ read_lock(&ksocknal_data.ksnd_global_lock);
+
+ return -EIO;
+}
+
+
+static void
+ksocknal_check_peer_timeouts(int idx)
{
- struct list_head *peers = &ksocknal_data.ksnd_peers[idx];
- struct list_head *ptmp;
- ksock_peer_t *peer;
- ksock_conn_t *conn;
+ struct hlist_head *peers = &ksocknal_data.ksnd_peers[idx];
+ struct ksock_peer_ni *peer_ni;
+ struct ksock_conn *conn;
+ struct ksock_tx *tx;
again:
- /* NB. We expect to have a look at all the peers and not find any
- * connections to time out, so we just use a shared lock while we
- * take a look... */
- read_lock (&ksocknal_data.ksnd_global_lock);
-
- list_for_each (ptmp, peers) {
- peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
- conn = ksocknal_find_timed_out_conn (peer);
-
- if (conn != NULL) {
- read_unlock (&ksocknal_data.ksnd_global_lock);
-
- CERROR ("Timeout out conn->"LPX64" ip %d.%d.%d.%d:%d\n",
- peer->ksnp_nid,
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- ksocknal_close_conn_and_siblings (conn, -ETIMEDOUT);
-
- /* NB we won't find this one again, but we can't
- * just proceed with the next peer, since we dropped
- * ksnd_global_lock and it might be dead already! */
- ksocknal_put_conn (conn);
- goto again;
+ /* NB. We expect to have a look at all the peers and not find any
+ * connections to time out, so we just use a shared lock while we
+ * take a look...
+ */
+ read_lock(&ksocknal_data.ksnd_global_lock);
+
+ hlist_for_each_entry(peer_ni, peers, ksnp_list) {
+ struct ksock_tx *tx_stale;
+ time64_t deadline = 0;
+ int resid = 0;
+ int n = 0;
+
+ if (ksocknal_send_keepalive_locked(peer_ni) != 0) {
+ read_unlock(&ksocknal_data.ksnd_global_lock);
+ goto again;
+ }
+
+ conn = ksocknal_find_timed_out_conn(peer_ni);
+
+ if (conn != NULL) {
+ read_unlock(&ksocknal_data.ksnd_global_lock);
+
+ ksocknal_close_conn_and_siblings(conn, -ETIMEDOUT);
+
+ /* NB we won't find this one again, but we can't
+ * just proceed with the next peer_ni, since we dropped
+ * ksnd_global_lock and it might be dead already!
+ */
+ ksocknal_conn_decref(conn);
+ goto again;
+ }
+
+ /* we can't process stale txs right here because we're
+ * holding only shared lock
+ */
+ if (!list_empty(&peer_ni->ksnp_tx_queue)) {
+ struct ksock_tx *tx;
+
+ tx = list_entry(peer_ni->ksnp_tx_queue.next,
+ struct ksock_tx, tx_list);
+ if (ktime_get_seconds() >= tx->tx_deadline) {
+ ksocknal_peer_addref(peer_ni);
+ read_unlock(&ksocknal_data.ksnd_global_lock);
+
+ ksocknal_flush_stale_txs(peer_ni);
+
+ ksocknal_peer_decref(peer_ni);
+ goto again;
+ }
+ }
+
+ if (list_empty(&peer_ni->ksnp_zc_req_list))
+ continue;
+
+ tx_stale = NULL;
+ spin_lock(&peer_ni->ksnp_lock);
+ list_for_each_entry(tx, &peer_ni->ksnp_zc_req_list, tx_zc_list) {
+ if (ktime_get_seconds() < tx->tx_deadline)
+ break;
+ /* ignore the TX if connection is being closed */
+ if (tx->tx_conn->ksnc_closing)
+ continue;
+ n++;
+ if (tx_stale == NULL)
+ tx_stale = tx;
}
+
+ if (tx_stale == NULL) {
+ spin_unlock(&peer_ni->ksnp_lock);
+ continue;
+ }
+
+ deadline = tx_stale->tx_deadline;
+ resid = tx_stale->tx_resid;
+ conn = tx_stale->tx_conn;
+ ksocknal_conn_addref(conn);
+
+ spin_unlock(&peer_ni->ksnp_lock);
+ read_unlock(&ksocknal_data.ksnd_global_lock);
+
+ CERROR("Total %d stale ZC_REQs for peer_ni %s detected; the "
+ "oldest(%p) timed out %lld secs ago, "
+ "resid: %d, wmem: %d\n",
+ n, libcfs_nid2str(peer_ni->ksnp_id.nid), tx_stale,
+ ktime_get_seconds() - deadline,
+ resid, conn->ksnc_sock->sk->sk_wmem_queued);
+
+ ksocknal_close_conn_and_siblings (conn, -ETIMEDOUT);
+ ksocknal_conn_decref(conn);
+ goto again;
}
- read_unlock (&ksocknal_data.ksnd_global_lock);
+ read_unlock(&ksocknal_data.ksnd_global_lock);
}
-int
-ksocknal_reaper (void *arg)
+int ksocknal_reaper(void *arg)
{
- cfs_waitlink_t wait;
- unsigned long flags;
- ksock_conn_t *conn;
- ksock_sched_t *sched;
- struct list_head enomem_conns;
- int nenomem_conns;
- cfs_duration_t timeout;
- int i;
- int peer_index = 0;
- cfs_time_t deadline = cfs_time_current();
-
- kportal_daemonize ("ksocknal_reaper");
- kportal_blockallsigs ();
-
- CFS_INIT_LIST_HEAD(&enomem_conns);
- cfs_waitlink_init (&wait);
-
- spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
+ wait_queue_entry_t wait;
+ struct ksock_conn *conn;
+ struct ksock_sched *sched;
+ LIST_HEAD(enomem_conns);
+ int nenomem_conns;
+ time64_t timeout;
+ int i;
+ int peer_index = 0;
+ time64_t deadline = ktime_get_seconds();
+
+ cfs_block_allsigs ();
+
+ init_waitqueue_entry(&wait, current);
+
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
while (!ksocknal_data.ksnd_shuttingdown) {
+ if (!list_empty(&ksocknal_data.ksnd_deathrow_conns)) {
+ conn = list_entry(ksocknal_data.ksnd_deathrow_conns.next,
+ struct ksock_conn, ksnc_list);
+ list_del(&conn->ksnc_list);
- if (!list_empty (&ksocknal_data.ksnd_deathrow_conns)) {
- conn = list_entry (ksocknal_data.ksnd_deathrow_conns.next,
- ksock_conn_t, ksnc_list);
- list_del (&conn->ksnc_list);
-
- spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
- ksocknal_terminate_conn (conn);
- ksocknal_put_conn (conn);
+ ksocknal_terminate_conn(conn);
+ ksocknal_conn_decref(conn);
- spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
continue;
}
- if (!list_empty (&ksocknal_data.ksnd_zombie_conns)) {
- conn = list_entry (ksocknal_data.ksnd_zombie_conns.next,
- ksock_conn_t, ksnc_list);
- list_del (&conn->ksnc_list);
-
- spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
+ if (!list_empty(&ksocknal_data.ksnd_zombie_conns)) {
+ conn = list_entry(ksocknal_data.ksnd_zombie_conns.next,
+ struct ksock_conn, ksnc_list);
+ list_del(&conn->ksnc_list);
- ksocknal_destroy_conn (conn);
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
- spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
+ ksocknal_destroy_conn(conn);
+
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
continue;
}
- if (!list_empty (&ksocknal_data.ksnd_enomem_conns)) {
- list_add(&enomem_conns, &ksocknal_data.ksnd_enomem_conns);
- list_del_init(&ksocknal_data.ksnd_enomem_conns);
+ if (!list_empty(&ksocknal_data.ksnd_enomem_conns)) {
+ list_add(&enomem_conns,
+ &ksocknal_data.ksnd_enomem_conns);
+ list_del_init(&ksocknal_data.ksnd_enomem_conns);
}
- spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
/* reschedule all the connections that stalled with ENOMEM... */
nenomem_conns = 0;
- while (!list_empty (&enomem_conns)) {
- conn = list_entry (enomem_conns.next,
- ksock_conn_t, ksnc_tx_list);
- list_del (&conn->ksnc_tx_list);
+ while (!list_empty(&enomem_conns)) {
+ conn = list_entry(enomem_conns.next,
+ struct ksock_conn, ksnc_tx_list);
+ list_del(&conn->ksnc_tx_list);
sched = conn->ksnc_scheduler;
- spin_lock_irqsave (&sched->kss_lock, flags);
+ spin_lock_bh(&sched->kss_lock);
- LASSERT (conn->ksnc_tx_scheduled);
- conn->ksnc_tx_ready = 1;
- list_add_tail (&conn->ksnc_tx_list, &sched->kss_tx_conns);
- cfs_waitq_signal (&sched->kss_waitq);
+ LASSERT(conn->ksnc_tx_scheduled);
+ conn->ksnc_tx_ready = 1;
+ list_add_tail(&conn->ksnc_tx_list,
+ &sched->kss_tx_conns);
+ wake_up(&sched->kss_waitq);
- spin_unlock_irqrestore (&sched->kss_lock, flags);
+ spin_unlock_bh(&sched->kss_lock);
nenomem_conns++;
}
-
- /* careful with the jiffy wrap... */
- while ((timeout = cfs_time_sub(deadline,
- cfs_time_current())) <= 0) {
- const int n = 4;
- const int p = 1;
- int chunk = ksocknal_data.ksnd_peer_hash_size;
-
- /* Time to check for timeouts on a few more peers: I do
- * checks every 'p' seconds on a proportion of the peer
- * table and I need to check every connection 'n' times
- * within a timeout interval, to ensure I detect a
- * timeout on any connection within (n+1)/n times the
- * timeout interval. */
-
- if (ksocknal_tunables.ksnd_io_timeout > n * p)
- chunk = (chunk * n * p) /
- ksocknal_tunables.ksnd_io_timeout;
- if (chunk == 0)
- chunk = 1;
-
- for (i = 0; i < chunk; i++) {
- ksocknal_check_peer_timeouts (peer_index);
- peer_index = (peer_index + 1) %
- ksocknal_data.ksnd_peer_hash_size;
- }
- deadline = cfs_time_add(deadline, cfs_time_seconds(p));
- }
+ /* careful with the jiffy wrap... */
+ while ((timeout = deadline - ktime_get_seconds()) <= 0) {
+ const int n = 4;
+ const int p = 1;
+ int chunk = HASH_SIZE(ksocknal_data.ksnd_peers);
+ unsigned int lnd_timeout;
+
+ /* Time to check for timeouts on a few more peers: I
+ * do checks every 'p' seconds on a proportion of the
+ * peer_ni table and I need to check every connection
+ * 'n' times within a timeout interval, to ensure I
+ * detect a timeout on any connection within (n+1)/n
+ * times the timeout interval.
+ */
+
+ lnd_timeout = lnet_get_lnd_timeout();
+ if (lnd_timeout > n * p)
+ chunk = (chunk * n * p) / lnd_timeout;
+ if (chunk == 0)
+ chunk = 1;
+
+ for (i = 0; i < chunk; i++) {
+ ksocknal_check_peer_timeouts(peer_index);
+ peer_index = (peer_index + 1) %
+ HASH_SIZE(ksocknal_data.ksnd_peers);
+ }
+
+ deadline += p;
+ }
if (nenomem_conns != 0) {
/* Reduce my timeout if I rescheduled ENOMEM conns.
* if any go back on my enomem list. */
timeout = SOCKNAL_ENOMEM_RETRY;
}
- ksocknal_data.ksnd_reaper_waketime =
- cfs_time_add(cfs_time_current(), timeout);
+ ksocknal_data.ksnd_reaper_waketime = ktime_get_seconds() +
+ timeout;
- set_current_state (TASK_INTERRUPTIBLE);
- cfs_waitq_add (&ksocknal_data.ksnd_reaper_waitq, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&ksocknal_data.ksnd_reaper_waitq, &wait);
- if (!ksocknal_data.ksnd_shuttingdown &&
- list_empty (&ksocknal_data.ksnd_deathrow_conns) &&
- list_empty (&ksocknal_data.ksnd_zombie_conns))
- cfs_waitq_timedwait (&wait, timeout);
+ if (!ksocknal_data.ksnd_shuttingdown &&
+ list_empty(&ksocknal_data.ksnd_deathrow_conns) &&
+ list_empty(&ksocknal_data.ksnd_zombie_conns))
+ schedule_timeout(cfs_time_seconds(timeout));
- set_current_state (TASK_RUNNING);
- cfs_waitq_del (&ksocknal_data.ksnd_reaper_waitq, &wait);
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&ksocknal_data.ksnd_reaper_waitq, &wait);
- spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
- }
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
+ }
- spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
- ksocknal_thread_fini ();
- return (0);
+ ksocknal_thread_fini();
+ return 0;
}
-
-lib_nal_t ksocknal_lib = {
- libnal_data: &ksocknal_data, /* NAL private data */
- libnal_send: ksocknal_send,
- libnal_send_pages: ksocknal_send_pages,
- libnal_recv: ksocknal_recv,
- libnal_recv_pages: ksocknal_recv_pages,
- libnal_dist: ksocknal_dist
-};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff