-/* -*- 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 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2011, 2017, Intel Corporation.
*
* 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 <libcfs/linux/linux-mem.h>
#include "socklnd.h"
+#include <linux/sunrpc/addr.h>
-ksock_tx_t *
-ksocknal_alloc_tx (int size)
+struct ksock_tx *
+ksocknal_alloc_tx(int type, int size)
{
- ksock_tx_t *tx = NULL;
+ struct ksock_tx *tx = NULL;
- if (size == KSOCK_NOOP_TX_SIZE) {
- /* searching for a noop tx in free list */
- cfs_spin_lock(&ksocknal_data.ksnd_tx_lock);
+ if (type == KSOCK_MSG_NOOP) {
+ LASSERT(size == KSOCK_NOOP_TX_SIZE);
- if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) {
- tx = list_entry(ksocknal_data.ksnd_idle_noop_txs.next,
- ksock_tx_t, tx_list);
- LASSERT(tx->tx_desc_size == size);
- list_del(&tx->tx_list);
- }
+ /* searching for a noop tx in free list */
+ spin_lock(&ksocknal_data.ksnd_tx_lock);
- cfs_spin_unlock(&ksocknal_data.ksnd_tx_lock);
+ tx = list_first_entry_or_null(&ksocknal_data.ksnd_idle_noop_txs,
+ struct ksock_tx, tx_list);
+ if (tx) {
+ LASSERT(tx->tx_desc_size == size);
+ list_del(&tx->tx_list);
+ }
+
+ spin_unlock(&ksocknal_data.ksnd_tx_lock);
}
if (tx == NULL)
if (tx == NULL)
return NULL;
- cfs_atomic_set(&tx->tx_refcount, 1);
- tx->tx_desc_size = size;
- cfs_atomic_inc(&ksocknal_data.ksnd_nactive_txs);
-
- return tx;
-}
-
-void
-ksocknal_free_tx (ksock_tx_t *tx)
-{
- cfs_atomic_dec(&ksocknal_data.ksnd_nactive_txs);
-
- if (tx->tx_desc_size == KSOCK_NOOP_TX_SIZE) {
- /* it's a noop tx */
- cfs_spin_lock(&ksocknal_data.ksnd_tx_lock);
+ refcount_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;
- list_add(&tx->tx_list, &ksocknal_data.ksnd_idle_noop_txs);
+ atomic_inc(&ksocknal_data.ksnd_nactive_txs);
- cfs_spin_unlock(&ksocknal_data.ksnd_tx_lock);
- } else {
- LIBCFS_FREE(tx, tx->tx_desc_size);
- }
+ return tx;
}
-void
-ksocknal_init_msg(ksock_msg_t *msg, int type)
+struct ksock_tx *
+ksocknal_alloc_tx_noop(__u64 cookie, int nonblk)
{
- msg->ksm_type = type;
- msg->ksm_csum = 0;
- msg->ksm_zc_req_cookie = 0;
- msg->ksm_zc_ack_cookie = 0;
+ struct ksock_tx *tx;
+
+ tx = ksocknal_alloc_tx(KSOCK_MSG_NOOP, KSOCK_NOOP_TX_SIZE);
+ if (tx == NULL) {
+ CERROR("Can't allocate noop tx desc\n");
+ return NULL;
+ }
+
+ tx->tx_conn = NULL;
+ tx->tx_lnetmsg = NULL;
+ tx->tx_kiov = NULL;
+ tx->tx_nkiov = 0;
+ tx->tx_niov = 1;
+ tx->tx_nonblk = nonblk;
+
+ 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;
+
+ return tx;
}
-int
-ksocknal_send_iov (ksock_conn_t *conn, ksock_tx_t *tx)
-{
- struct iovec *iov = tx->tx_iov;
- int nob;
- int rc;
-
- LASSERT (tx->tx_niov > 0);
-
- /* Never touch tx->tx_iov inside ksocknal_lib_send_iov() */
- rc = ksocknal_lib_send_iov(conn, tx);
- if (rc <= 0) /* sent nothing? */
- return (rc);
-
- nob = rc;
- LASSERT (nob <= tx->tx_resid);
- tx->tx_resid -= nob;
-
- /* "consume" iov */
- do {
- LASSERT (tx->tx_niov > 0);
+void
+ksocknal_free_tx(struct ksock_tx *tx)
+{
+ atomic_dec(&ksocknal_data.ksnd_nactive_txs);
- if (nob < (int) iov->iov_len) {
- iov->iov_base = (void *)((char *)iov->iov_base + nob);
- iov->iov_len -= nob;
- return (rc);
- }
+ 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);
- nob -= iov->iov_len;
- tx->tx_iov = ++iov;
- tx->tx_niov--;
- } while (nob != 0);
+ list_add(&tx->tx_list, &ksocknal_data.ksnd_idle_noop_txs);
- return (rc);
+ spin_unlock(&ksocknal_data.ksnd_tx_lock);
+ } else {
+ LIBCFS_FREE(tx, tx->tx_desc_size);
+ }
}
-int
-ksocknal_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx)
+static int
+ksocknal_send_hdr(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
{
- lnet_kiov_t *kiov = tx->tx_kiov;
- int nob;
- int rc;
+ struct kvec *iov = &tx->tx_hdr;
+ int nob;
+ int rc;
- LASSERT (tx->tx_niov == 0);
- LASSERT (tx->tx_nkiov > 0);
+ LASSERT(tx->tx_niov > 0);
- /* Never touch tx->tx_kiov inside ksocknal_lib_send_kiov() */
- rc = ksocknal_lib_send_kiov(conn, tx);
+ /* Never touch tx->tx_hdr inside ksocknal_lib_send_hdr() */
+ rc = ksocknal_lib_send_hdr(conn, tx, scratch_iov);
- if (rc <= 0) /* sent nothing? */
- return (rc);
+ if (rc <= 0) /* sent nothing? */
+ return rc;
- nob = rc;
- LASSERT (nob <= tx->tx_resid);
- tx->tx_resid -= nob;
+ nob = rc;
+ LASSERT(nob <= tx->tx_resid);
+ tx->tx_resid -= nob;
- /* "consume" kiov */
- do {
- LASSERT(tx->tx_nkiov > 0);
+ /* "consume" iov */
+ LASSERT(tx->tx_niov == 1);
- if (nob < (int)kiov->kiov_len) {
- kiov->kiov_offset += nob;
- kiov->kiov_len -= nob;
- return rc;
- }
+ if (nob < (int) iov->iov_len) {
+ iov->iov_base += nob;
+ iov->iov_len -= nob;
+ return rc;
+ }
- nob -= (int)kiov->kiov_len;
- tx->tx_kiov = ++kiov;
- tx->tx_nkiov--;
- } while (nob != 0);
+ LASSERT(nob == iov->iov_len);
+ tx->tx_niov--;
- return (rc);
+ return rc;
}
-int
-ksocknal_transmit (ksock_conn_t *conn, ksock_tx_t *tx)
+static int
+ksocknal_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
{
- int rc;
- int bufnob;
-
- if (ksocknal_data.ksnd_stall_tx != 0) {
- cfs_pause(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);
- }
+ struct bio_vec *kiov = tx->tx_kiov;
+ int nob;
+ int rc;
- 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);
- }
+ LASSERT(tx->tx_niov == 0);
+ LASSERT(tx->tx_nkiov > 0);
- bufnob = libcfs_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_timeout);
- conn->ksnc_peer->ksnp_last_alive = cfs_time_current();
- conn->ksnc_tx_bufnob = bufnob;
- cfs_mb();
- }
+ /* Never touch tx->tx_kiov inside ksocknal_lib_send_kiov() */
+ rc = ksocknal_lib_send_kiov(conn, tx, scratch_iov);
- if (rc <= 0) { /* Didn't write anything? */
+ if (rc <= 0) /* sent nothing? */
+ return rc;
- if (rc == 0) /* some stacks return 0 instead of -EAGAIN */
- rc = -EAGAIN;
+ nob = rc;
+ LASSERT(nob <= tx->tx_resid);
+ tx->tx_resid -= nob;
- /* Check if EAGAIN is due to memory pressure */
- if(rc == -EAGAIN && ksocknal_lib_memory_pressure(conn))
- rc = -ENOMEM;
+ /* "consume" kiov */
+ do {
+ LASSERT(tx->tx_nkiov > 0);
- break;
- }
+ if (nob < (int)kiov->bv_len) {
+ kiov->bv_offset += nob;
+ kiov->bv_len -= nob;
+ return rc;
+ }
- /* socket's wmem_queued now includes 'rc' bytes */
- cfs_atomic_sub (rc, &conn->ksnc_tx_nob);
- rc = 0;
+ nob -= (int)kiov->bv_len;
+ tx->tx_kiov = ++kiov;
+ tx->tx_nkiov--;
+ } while (nob != 0);
- } while (tx->tx_resid != 0);
+ return rc;
+}
- ksocknal_connsock_decref(conn);
- return (rc);
+static int
+ksocknal_transmit(struct ksock_conn *conn, struct ksock_tx *tx,
+ struct kvec *scratch_iov)
+{
+ int rc;
+ int bufnob;
+
+ if (ksocknal_data.ksnd_stall_tx != 0)
+ schedule_timeout_uninterruptible(
+ 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_hdr(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() +
+ ksocknal_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_recv_iov (ksock_conn_t *conn)
+static int
+ksocknal_recv_iov(struct ksock_conn *conn, struct kvec *scratchiov)
{
- struct iovec *iov = conn->ksnc_rx_iov;
- int nob;
- int rc;
+ struct kvec *iov = conn->ksnc_rx_iov;
+ int nob;
+ int rc;
- LASSERT (conn->ksnc_rx_niov > 0);
+ 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);
+ /* Never touch conn->ksnc_rx_iov or change connection
+ * status inside ksocknal_lib_recv_iov */
+ rc = ksocknal_lib_recv_iov(conn, scratchiov);
- if (rc <= 0)
- return (rc);
+ if (rc <= 0)
+ return rc;
- /* received something... */
- nob = rc;
+ /* received something... */
+ nob = rc;
- conn->ksnc_peer->ksnp_last_alive = cfs_time_current();
- conn->ksnc_rx_deadline =
- cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
- cfs_mb(); /* order with setting rx_started */
- conn->ksnc_rx_started = 1;
+ conn->ksnc_peer->ksnp_last_alive = ktime_get_seconds();
+ conn->ksnc_rx_deadline = ktime_get_seconds() +
+ ksocknal_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;
+ conn->ksnc_rx_nob_wanted -= nob;
+ conn->ksnc_rx_nob_left -= nob;
- do {
- LASSERT (conn->ksnc_rx_niov > 0);
+ do {
+ LASSERT(conn->ksnc_rx_niov > 0);
- if (nob < (int)iov->iov_len) {
- iov->iov_len -= nob;
- iov->iov_base = (void *)((char *)iov->iov_base + nob);
- return (-EAGAIN);
- }
+ if (nob < (int)iov->iov_len) {
+ iov->iov_len -= nob;
+ iov->iov_base += nob;
+ return -EAGAIN;
+ }
- nob -= iov->iov_len;
- conn->ksnc_rx_iov = ++iov;
- conn->ksnc_rx_niov--;
- } while (nob != 0);
+ nob -= iov->iov_len;
+ conn->ksnc_rx_iov = ++iov;
+ conn->ksnc_rx_niov--;
+ } while (nob != 0);
- return (rc);
+ return rc;
}
-int
-ksocknal_recv_kiov (ksock_conn_t *conn)
+static int
+ksocknal_recv_kiov(struct ksock_conn *conn, struct page **rx_scratch_pgs,
+ struct kvec *scratch_iov)
{
- lnet_kiov_t *kiov = conn->ksnc_rx_kiov;
- int nob;
- int rc;
- LASSERT (conn->ksnc_rx_nkiov > 0);
+ struct bio_vec *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);
+ /* 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);
+ if (rc <= 0)
+ return rc;
- /* received something... */
- nob = rc;
+ /* received something... */
+ nob = rc;
- conn->ksnc_peer->ksnp_last_alive = cfs_time_current();
- conn->ksnc_rx_deadline =
- cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
- cfs_mb(); /* order with setting rx_started */
- conn->ksnc_rx_started = 1;
+ conn->ksnc_peer->ksnp_last_alive = ktime_get_seconds();
+ conn->ksnc_rx_deadline = ktime_get_seconds() +
+ ksocknal_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;
+ conn->ksnc_rx_nob_wanted -= nob;
+ conn->ksnc_rx_nob_left -= nob;
- do {
- LASSERT (conn->ksnc_rx_nkiov > 0);
+ do {
+ LASSERT(conn->ksnc_rx_nkiov > 0);
- if (nob < (int) kiov->kiov_len) {
- kiov->kiov_offset += nob;
- kiov->kiov_len -= nob;
- return -EAGAIN;
- }
+ if (nob < (int) kiov->bv_len) {
+ kiov->bv_offset += nob;
+ kiov->bv_len -= nob;
+ return -EAGAIN;
+ }
- nob -= kiov->kiov_len;
- conn->ksnc_rx_kiov = ++kiov;
- conn->ksnc_rx_nkiov--;
- } while (nob != 0);
+ nob -= kiov->bv_len;
+ conn->ksnc_rx_kiov = ++kiov;
+ conn->ksnc_rx_nkiov--;
+ } while (nob != 0);
- return 1;
+ return 1;
}
-int
-ksocknal_receive (ksock_conn_t *conn)
+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) {
- cfs_pause(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);
- 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;
- }
-
- /* Completed a fragment */
-
- if (conn->ksnc_rx_nob_wanted == 0) {
- rc = 1;
- break;
- }
- }
-
- ksocknal_connsock_decref(conn);
- RETURN (rc);
+ /* 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)
+ schedule_timeout_uninterruptible(
+ 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);
}
void
-ksocknal_tx_done (lnet_ni_t *ni, ksock_tx_t *tx)
+ksocknal_tx_done(struct lnet_ni *ni, struct ksock_tx *tx, int rc)
{
- lnet_msg_t *lnetmsg = tx->tx_lnetmsg;
- int rc = (tx->tx_resid == 0) ? 0 : -EIO;
+ struct lnet_msg *lnetmsg = tx->tx_lnetmsg;
+ enum lnet_msg_hstatus hstatus = tx->tx_hstatus;
ENTRY;
- LASSERT(ni != NULL || tx->tx_conn != NULL);
+ LASSERT(ni != NULL || tx->tx_conn != NULL);
- if (tx->tx_conn != NULL)
- ksocknal_conn_decref(tx->tx_conn);
+ if (!rc && (tx->tx_resid != 0 || tx->tx_zc_aborted)) {
+ rc = -EIO;
+ if (hstatus == LNET_MSG_STATUS_OK)
+ hstatus = LNET_MSG_STATUS_LOCAL_ERROR;
+ }
- if (ni == NULL && tx->tx_conn != NULL)
- ni = tx->tx_conn->ksnc_peer->ksnp_ni;
+ if (tx->tx_conn != NULL)
+ ksocknal_conn_decref(tx->tx_conn);
- ksocknal_free_tx (tx);
- if (lnetmsg != NULL) /* KSOCK_MSG_NOOP go without lnetmsg */
- lnet_finalize (ni, lnetmsg, rc);
+ ksocknal_free_tx(tx);
+ if (lnetmsg != NULL) { /* KSOCK_MSG_NOOP go without lnetmsg */
+ lnetmsg->msg_health_status = hstatus;
+ lnet_finalize(lnetmsg, rc);
+ }
- EXIT;
+ EXIT;
}
void
-ksocknal_txlist_done (lnet_ni_t *ni, struct list_head *txlist, int error)
+ksocknal_txlist_done(struct lnet_ni *ni, struct list_head *txlist, int error)
{
- ksock_tx_t *tx;
-
- while (!list_empty (txlist)) {
- tx = list_entry (txlist->next, ksock_tx_t, tx_list);
-
- if (error && tx->tx_lnetmsg != NULL) {
- CDEBUG (D_NETERROR, "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) {
- CDEBUG (D_NETERROR, "Deleting noop packet\n");
- }
-
- list_del (&tx->tx_list);
-
- LASSERT (cfs_atomic_read(&tx->tx_refcount) == 1);
- ksocknal_tx_done (ni, tx);
- }
+ struct ksock_tx *tx;
+
+ while ((tx = list_first_entry_or_null(txlist, struct ksock_tx,
+ tx_list)) != NULL) {
+ 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(refcount_read(&tx->tx_refcount) == 1);
+ ksocknal_tx_done(ni, tx, error);
+ }
}
static void
-ksocknal_check_zc_req(ksock_tx_t *tx)
+ksocknal_check_zc_req(struct ksock_tx *tx)
{
- ksock_conn_t *conn = tx->tx_conn;
- ksock_peer_t *peer = conn->ksnc_peer;
- lnet_kiov_t *kiov = tx->tx_kiov;
- int nkiov = tx->tx_nkiov;
+ struct ksock_conn *conn = tx->tx_conn;
+ struct ksock_peer_ni *peer_ni = conn->ksnc_peer;
- /* Set tx_msg.ksm_zc_req_cookie to a unique non-zero cookie and add tx
+ /* 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 will send an ACK containing this cookie when
+ * 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_req_cookie remains non-zero while tx is on
+ * 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);
- if (conn->ksnc_proto != &ksocknal_protocol_v2x ||
- !conn->ksnc_zc_capable)
- return;
-
- while (nkiov > 0) {
- if (kiov->kiov_len >= *ksocknal_tunables.ksnd_zc_min_frag)
- break;
- --nkiov;
- ++kiov;
- }
+ tx->tx_zc_checked = 1;
- if (nkiov == 0)
+ if (conn->ksnc_proto == &ksocknal_protocol_v1x ||
+ !conn->ksnc_zc_capable)
return;
/* assign cookie and queue tx to pending list, it will be released when
- * a matching ack is received. See ksocknal_handle_zc_ack() */
+ * a matching ack is received. See ksocknal_handle_zcack() */
ksocknal_tx_addref(tx);
- cfs_spin_lock(&peer->ksnp_lock);
-
- /* ZC_REQ is going to be pinned to the peer */
- tx->tx_deadline =
- cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
-
- LASSERT (tx->tx_msg.ksm_zc_req_cookie == 0);
- tx->tx_msg.ksm_zc_req_cookie = peer->ksnp_zc_next_cookie++;
- list_add_tail(&tx->tx_zc_list, &peer->ksnp_zc_req_list);
-
- cfs_spin_unlock(&peer->ksnp_lock);
-}
+ spin_lock(&peer_ni->ksnp_lock);
-static void
-ksocknal_unzc_req(ksock_tx_t *tx)
-{
- ksock_peer_t *peer = tx->tx_conn->ksnc_peer;
+ /* ZC_REQ is going to be pinned to the peer_ni */
+ tx->tx_deadline = ktime_get_seconds() +
+ ksocknal_timeout();
- cfs_spin_lock(&peer->ksnp_lock);
+ LASSERT (tx->tx_msg.ksm_zc_cookies[0] == 0);
- if (tx->tx_msg.ksm_zc_req_cookie == 0) {
- /* Not waiting for an ACK */
- cfs_spin_unlock(&peer->ksnp_lock);
- return;
- }
+ tx->tx_msg.ksm_zc_cookies[0] = peer_ni->ksnp_zc_next_cookie++;
- tx->tx_msg.ksm_zc_req_cookie = 0;
- list_del(&tx->tx_zc_list);
+ if (peer_ni->ksnp_zc_next_cookie == 0)
+ peer_ni->ksnp_zc_next_cookie = SOCKNAL_KEEPALIVE_PING + 1;
- cfs_spin_unlock(&peer->ksnp_lock);
+ list_add_tail(&tx->tx_zc_list, &peer_ni->ksnp_zc_req_list);
- ksocknal_tx_decref(tx);
+ 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)
{
- int rc;
-
- if (!tx->tx_checked_zc) {
- tx->tx_checked_zc = 1;
- ksocknal_check_zc_req(tx);
- }
+ struct ksock_peer_ni *peer_ni = tx->tx_conn->ksnc_peer;
- rc = ksocknal_transmit (conn, tx);
+ LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
+ LASSERT(tx->tx_zc_capable);
- CDEBUG (D_NET, "send(%d) %d\n", tx->tx_resid, rc);
+ tx->tx_zc_checked = 0;
- if (tx->tx_resid == 0) {
- /* Sent everything OK */
- LASSERT (rc == 0);
+ spin_lock(&peer_ni->ksnp_lock);
- return (0);
- }
+ if (tx->tx_msg.ksm_zc_cookies[0] == 0) {
+ /* Not waiting for an ACK */
+ spin_unlock(&peer_ni->ksnp_lock);
+ return;
+ }
- if (rc == -EAGAIN)
- return (rc);
+ tx->tx_msg.ksm_zc_cookies[0] = 0;
+ list_del(&tx->tx_zc_list);
- if (rc == -ENOMEM) {
- static int counter;
+ spin_unlock(&peer_ni->ksnp_lock);
- counter++; /* exponential backoff warnings */
- if ((counter & (-counter)) == counter)
- CWARN("%u ENOMEM tx %p (%u allocated)\n",
- counter, conn, cfs_atomic_read(&libcfs_kmemory));
+ ksocknal_tx_decref(tx);
+}
- /* Queue on ksnd_enomem_conns for retry after a timeout */
- cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
+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 (%lld allocated)\n",
+ counter, conn, libcfs_kmem_read());
+
+ /* 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 %pIS reset our connection while we were sending data; it may have rebooted.\n",
+ &conn->ksnc_peeraddr);
+ break;
+ default:
+ LCONSOLE_WARN("There was an unexpected network error while writing to %pIS: %d.\n",
+ &conn->ksnc_peeraddr, rc);
+ break;
+ }
+ CDEBUG(D_NET, "[%p] Error %d on write to %s ip %pISp\n",
+ conn, rc, libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ &conn->ksnc_peeraddr);
+ }
+
+ 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;
+}
- /* 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);
+static void
+ksocknal_launch_connection_locked(struct ksock_conn_cb *conn_cb)
+{
+ /* called holding write lock on ksnd_global_lock */
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
- return (rc);
- }
+ LASSERT(!conn_cb->ksnr_scheduled);
+ LASSERT(!conn_cb->ksnr_connecting);
+ LASSERT((ksocknal_conn_cb_mask() & ~conn_cb->ksnr_connected) != 0);
- /* Actual error */
- LASSERT (rc < 0);
+ /* scheduling conn for connd */
+ conn_cb->ksnr_scheduled = 1;
- 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;
- }
- CDEBUG(D_NET, "[%p] Error %d on write to %s"
- " ip %d.%d.%d.%d:%d\n", conn, rc,
- libcfs_id2str(conn->ksnc_peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- }
+ /* extra ref for connd */
+ ksocknal_conn_cb_addref(conn_cb);
- ksocknal_unzc_req(tx);
+ spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
- /* it's not an error if conn is being closed */
- ksocknal_close_conn_and_siblings (conn,
- (conn->ksnc_closing) ? 0 : rc);
+ list_add_tail(&conn_cb->ksnr_connd_list,
+ &ksocknal_data.ksnd_connd_routes);
+ wake_up(&ksocknal_data.ksnd_connd_waitq);
- return (rc);
+ spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
}
void
-ksocknal_launch_connection_locked (ksock_route_t *route)
+ksocknal_launch_all_connections_locked(struct ksock_peer_ni *peer_ni)
{
+ struct ksock_conn_cb *conn_cb;
- /* called holding write lock on ksnd_global_lock */
+ /* called holding write lock on ksnd_global_lock */
+ for (;;) {
+ /* launch any/all connections that need it */
+ conn_cb = ksocknal_find_connectable_conn_cb_locked(peer_ni);
+ if (conn_cb == NULL)
+ return;
- LASSERT (!route->ksnr_scheduled);
- LASSERT (!route->ksnr_connecting);
- LASSERT ((ksocknal_route_mask() & ~route->ksnr_connected) != 0);
-
- route->ksnr_scheduled = 1; /* scheduling conn for connd */
- ksocknal_route_addref(route); /* extra ref for connd */
-
- cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
-
- list_add_tail (&route->ksnr_connd_list,
- &ksocknal_data.ksnd_connd_routes);
- cfs_waitq_signal (&ksocknal_data.ksnd_connd_waitq);
-
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ ksocknal_launch_connection_locked(conn_cb);
+ }
}
-ksock_conn_t *
-ksocknal_find_conn_locked (int payload_nob, 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);
- int hdr_nob = 0;
-#if SOCKNAL_ROUND_ROBIN
- const int nob = 0;
-#else
- int nob = cfs_atomic_read(&c->ksnc_tx_nob) +
- libcfs_sock_wmem_queued(c->ksnc_sock);
-#endif
- LASSERT (!c->ksnc_closing);
- LASSERT (c->ksnc_proto != NULL);
-
- if (fallback == NULL || nob < fnob) {
- fallback = c;
- fnob = nob;
- }
+ 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 (!*ksocknal_tunables.ksnd_typed_conns)
- continue;
+ LASSERT (!c->ksnc_closing);
+ LASSERT (c->ksnc_proto != NULL &&
+ c->ksnc_proto->pro_match_tx != NULL);
- if (payload_nob == 0) {
- /* noop packet */
- hdr_nob = offsetof(ksock_msg_t, ksm_u);
- } else {
- /* lnet packet */
- hdr_nob = (c->ksnc_proto == &ksocknal_protocol_v2x)?
- sizeof(ksock_msg_t) : sizeof(lnet_hdr_t);
- }
+ 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 SOCKLND_CONN_ANY:
- break;
- case SOCKLND_CONN_BULK_IN:
+ case SOCKNAL_MATCH_NO: /* protocol rejected the tx */
continue;
- case SOCKLND_CONN_BULK_OUT:
- if ((hdr_nob + payload_nob) < *ksocknal_tunables.ksnd_min_bulk)
- continue;
- break;
- case SOCKLND_CONN_CONTROL:
- if ((hdr_nob + payload_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_next_mono_tx(ksock_conn_t *conn)
-{
- ksock_tx_t *tx = conn->ksnc_tx_mono;
-
- /* Called holding BH lock: conn->ksnc_scheduler->kss_lock */
- LASSERT(conn->ksnc_proto == &ksocknal_protocol_v2x);
- LASSERT(!list_empty(&conn->ksnc_tx_queue));
- LASSERT(tx != NULL);
-
- if (tx->tx_list.next == &conn->ksnc_tx_queue) {
- /* no more packets queued */
- conn->ksnc_tx_mono = NULL;
- } else {
- conn->ksnc_tx_mono = list_entry(tx->tx_list.next, ksock_tx_t, tx_list);
- LASSERT(conn->ksnc_tx_mono->tx_msg.ksm_type == tx->tx_msg.ksm_type);
- }
-}
-
-int
-ksocknal_piggyback_zcack(ksock_conn_t *conn, __u64 cookie)
+ksocknal_tx_prep(struct ksock_conn *conn, struct ksock_tx *tx)
{
- ksock_tx_t *tx = conn->ksnc_tx_mono;
-
- /* Called holding BH lock: conn->ksnc_scheduler->kss_lock */
-
- if (tx == NULL)
- return 0;
-
- if (tx->tx_msg.ksm_type == KSOCK_MSG_NOOP) {
- /* tx is noop zc-ack, can't piggyback zc-ack cookie */
- return 0;
- }
-
- LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_LNET);
- LASSERT(tx->tx_msg.ksm_zc_ack_cookie == 0);
-
- /* piggyback the zc-ack cookie */
- tx->tx_msg.ksm_zc_ack_cookie = cookie;
- ksocknal_next_mono_tx(conn);
+ conn->ksnc_proto->pro_pack(tx);
- return 1;
+ 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 (ksock_tx_t *tx, ksock_conn_t *conn)
+ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn)
{
- ksock_sched_t *sched = conn->ksnc_scheduler;
- ksock_msg_t *msg = &tx->tx_msg;
- ksock_tx_t *ztx;
- int bufnob = 0;
+ 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,
* ksnc_sock... */
LASSERT(!conn->ksnc_closing);
- CDEBUG (D_NET, "Sending to %s ip %d.%d.%d.%d:%d\n",
- libcfs_id2str(conn->ksnc_peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
-
- tx->tx_checked_zc = 0;
- conn->ksnc_proto->pro_pack(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, "Sending to %s ip %pISp\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ &conn->ksnc_peeraddr);
+
+ 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_hdr) +
+ 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->tx_lnetmsg != NULL) ? tx->tx_lnetmsg->msg_hdr.type:
+ KSOCK_MSG_NOOP,
tx->tx_nob, tx->tx_niov, tx->tx_nkiov);
- cfs_atomic_add (tx->tx_nob, &conn->ksnc_tx_nob);
- tx->tx_conn = conn;
- ksocknal_conn_addref(conn); /* +1 ref for tx */
+ bufnob = conn->ksnc_sock->sk->sk_wmem_queued;
+ spin_lock_bh(&sched->kss_lock);
- /*
- * FIXME: SOCK_WMEM_QUEUED and SOCK_ERROR could block in __DARWIN8__
- * but they're used inside spinlocks a lot.
- */
- bufnob = libcfs_sock_wmem_queued(conn->ksnc_sock);
- cfs_spin_lock_bh (&sched->kss_lock);
-
- if (list_empty(&conn->ksnc_tx_queue) && bufnob == 0) {
- /* First packet starts the timeout */
- conn->ksnc_tx_deadline =
- cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
- conn->ksnc_tx_bufnob = 0;
- cfs_mb(); /* order with adding to tx_queue */
- }
+ if (list_empty(&conn->ksnc_tx_queue) && bufnob == 0) {
+ /* First packet starts the timeout */
+ conn->ksnc_tx_deadline = ktime_get_seconds() +
+ ksocknal_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 */
+ }
- ztx = NULL;
-
- 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_req_cookie == 0);
- LASSERT(msg->ksm_zc_ack_cookie != 0);
-
- if (conn->ksnc_tx_mono != NULL) {
- if (ksocknal_piggyback_zcack(conn, msg->ksm_zc_ack_cookie)) {
- /* zc-ack cookie is piggybacked */
- cfs_atomic_sub (tx->tx_nob, &conn->ksnc_tx_nob);
- ztx = tx; /* Put to freelist later */
- } else {
- /* no packet can piggyback zc-ack cookie */
- list_add_tail (&tx->tx_list, &conn->ksnc_tx_queue);
- }
- } else {
- /* It's the first mono-packet */
- conn->ksnc_tx_mono = tx;
- list_add_tail (&tx->tx_list, &conn->ksnc_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_ack_cookie == 0);
-
- if (conn->ksnc_proto == &ksocknal_protocol_v2x && /* V2.x packet */
- conn->ksnc_tx_mono != NULL) {
- if (conn->ksnc_tx_mono->tx_msg.ksm_type == KSOCK_MSG_NOOP) {
- /* There is a noop zc-ack can be piggybacked */
- ztx = conn->ksnc_tx_mono;
-
- msg->ksm_zc_ack_cookie = ztx->tx_msg.ksm_zc_ack_cookie;
- ksocknal_next_mono_tx(conn);
-
- /* use tx to replace the noop zc-ack packet, ztx will
- * be put to freelist later */
- list_add(&tx->tx_list, &ztx->tx_list);
- list_del(&ztx->tx_list);
-
- cfs_atomic_sub (ztx->tx_nob, &conn->ksnc_tx_nob);
- } else {
- /* no noop zc-ack packet, just enqueue it */
- LASSERT(conn->ksnc_tx_mono->tx_msg.ksm_type == KSOCK_MSG_LNET);
- list_add_tail (&tx->tx_list, &conn->ksnc_tx_queue);
- }
+ LASSERT (msg->ksm_zc_cookies[1] == 0);
+ LASSERT (conn->ksnc_proto->pro_queue_tx_msg != NULL);
- } else if (conn->ksnc_proto == &ksocknal_protocol_v2x) {
- /* it's the first mono-packet, enqueue it */
- conn->ksnc_tx_mono = tx;
- list_add_tail (&tx->tx_list, &conn->ksnc_tx_queue);
- } else {
- /* V1.x packet, just enqueue it */
- list_add_tail (&tx->tx_list, &conn->ksnc_tx_queue);
- }
+ ztx = conn->ksnc_proto->pro_queue_tx_msg(conn, tx);
+ /* ztx will be released later */
}
- if (ztx != NULL)
- list_add_tail(&ztx->tx_list, &sched->kss_zombie_noop_txs);
-
- 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;
- 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);
}
- cfs_spin_unlock_bh (&sched->kss_lock);
-}
-
-ksock_route_t *
-ksocknal_find_connectable_route_locked (ksock_peer_t *peer)
-{
- struct list_head *tmp;
- ksock_route_t *route;
-
- list_for_each (tmp, &peer->ksnp_routes) {
- route = list_entry (tmp, ksock_route_t, 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;
+ 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);
+ }
- /* too soon to retry this guy? */
- if (!(route->ksnr_retry_interval == 0 || /* first attempt */
- cfs_time_aftereq (cfs_time_current(),
- route->ksnr_timeout)))
- continue;
+ spin_unlock_bh(&sched->kss_lock);
+}
- return (route);
- }
- return (NULL);
+struct ksock_conn_cb *
+ksocknal_find_connectable_conn_cb_locked(struct ksock_peer_ni *peer_ni)
+{
+ time64_t now = ktime_get_seconds();
+ struct ksock_conn_cb *conn_cb;
+
+ conn_cb = peer_ni->ksnp_conn_cb;
+ if (!conn_cb)
+ return NULL;
+
+ LASSERT(!conn_cb->ksnr_connecting || conn_cb->ksnr_scheduled);
+
+ if (conn_cb->ksnr_scheduled) /* connections being established */
+ return NULL;
+
+ /* all conn types connected ? */
+ if ((ksocknal_conn_cb_mask() & ~conn_cb->ksnr_connected) == 0)
+ return NULL;
+
+ if (!(conn_cb->ksnr_retry_interval == 0 || /* first attempt */
+ now >= conn_cb->ksnr_timeout)) {
+ CDEBUG(D_NET,
+ "Too soon to retry route %pIS (cnted %d, interval %lld, %lld secs later)\n",
+ &conn_cb->ksnr_addr,
+ conn_cb->ksnr_connected,
+ conn_cb->ksnr_retry_interval,
+ conn_cb->ksnr_timeout - now);
+ return NULL;
+ }
+
+ return conn_cb;
}
-ksock_route_t *
-ksocknal_find_connecting_route_locked (ksock_peer_t *peer)
+struct ksock_conn_cb *
+ksocknal_find_connecting_conn_cb_locked(struct ksock_peer_ni *peer_ni)
{
- struct list_head *tmp;
- ksock_route_t *route;
-
- list_for_each (tmp, &peer->ksnp_routes) {
- route = list_entry (tmp, ksock_route_t, ksnr_list);
+ struct ksock_conn_cb *conn_cb;
- LASSERT (!route->ksnr_connecting || route->ksnr_scheduled);
+ conn_cb = peer_ni->ksnp_conn_cb;
+ if (!conn_cb)
+ return NULL;
- if (route->ksnr_scheduled)
- return (route);
- }
+ LASSERT(!conn_cb->ksnr_connecting || conn_cb->ksnr_scheduled);
- return (NULL);
+ return conn_cb->ksnr_scheduled ? conn_cb : NULL;
}
int
-ksocknal_launch_packet (lnet_ni_t *ni, ksock_tx_t *tx, lnet_process_id_t id)
+ksocknal_launch_packet(struct lnet_ni *ni, struct ksock_tx *tx,
+ struct lnet_process_id id)
{
- ksock_peer_t *peer;
- ksock_conn_t *conn;
- ksock_route_t *route;
- cfs_rwlock_t *g_lock;
- int retry;
- int rc;
-
- LASSERT (tx->tx_conn == NULL);
- LASSERT (tx->tx_lnetmsg != NULL);
-
- g_lock = &ksocknal_data.ksnd_global_lock;
-
- for (retry = 0;; retry = 1) {
-#if !SOCKNAL_ROUND_ROBIN
- cfs_read_lock (g_lock);
- peer = ksocknal_find_peer_locked(ni, id);
- if (peer != NULL) {
- if (ksocknal_find_connectable_route_locked(peer) == NULL) {
- conn = ksocknal_find_conn_locked (tx->tx_lnetmsg->msg_len, peer);
- if (conn != NULL) {
- /* I've got no routes that need to be
- * connecting and I do have an actual
- * connection... */
+ struct ksock_peer_ni *peer_ni;
+ struct ksock_conn *conn;
+ struct sockaddr_in sa;
+ rwlock_t *g_lock;
+ int retry;
+ int rc;
+
+ LASSERT(tx->tx_conn == NULL);
+
+ g_lock = &ksocknal_data.ksnd_global_lock;
+
+ 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_conn_cb_locked(peer_ni) == NULL) {
+ conn = ksocknal_find_conn_locked(peer_ni, tx, tx->tx_nonblk);
+ if (conn != NULL) {
+ /* I've got nothing that need to be
+ * connecting and I do have an actual
+ * connection...
+ */
ksocknal_queue_tx_locked (tx, conn);
- cfs_read_unlock (g_lock);
+ read_unlock(g_lock);
return (0);
- }
- }
- }
+ }
+ }
+ }
/* I'll need a write lock... */
- cfs_read_unlock (g_lock);
-#endif
- cfs_write_lock_bh (g_lock);
+ read_unlock(g_lock);
- peer = ksocknal_find_peer_locked(ni, id);
- if (peer != NULL)
+ write_lock_bh(g_lock);
+
+ peer_ni = ksocknal_find_peer_locked(ni, id);
+ if (peer_ni != NULL)
break;
- cfs_write_unlock_bh (g_lock);
+ write_unlock_bh(g_lock);
if ((id.pid & LNET_PID_USERFLAG) != 0) {
CERROR("Refusing to create a connection to "
}
if (retry) {
- CERROR("Can't find peer %s\n", libcfs_id2str(id));
+ 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());
+ memset(&sa, 0, sizeof(sa));
+ sa.sin_family = AF_INET;
+ sa.sin_addr.s_addr = htonl(LNET_NIDADDR(id.nid));
+ sa.sin_port = htons(lnet_acceptor_port());
+ rc = ksocknal_add_peer(ni, id, (struct sockaddr *)&sa);
if (rc != 0) {
- CERROR("Can't add peer %s: %d\n",
+ CERROR("Can't add peer_ni %s: %d\n",
libcfs_id2str(id), rc);
return rc;
}
}
- for (;;) {
- /* launch any/all connections that need it */
- route = ksocknal_find_connectable_route_locked (peer);
- if (route == NULL)
- break;
-
- ksocknal_launch_connection_locked (route);
- }
+ ksocknal_launch_all_connections_locked(peer_ni);
- conn = ksocknal_find_conn_locked (tx->tx_lnetmsg->msg_len, peer);
+ 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);
- cfs_write_unlock_bh (g_lock);
+ write_unlock_bh(g_lock);
return (0);
}
- if (peer->ksnp_accepting > 0 ||
- ksocknal_find_connecting_route_locked (peer) != NULL) {
- /* the message is going to be pinned to the peer */
- tx->tx_deadline =
- cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
-
+ if (peer_ni->ksnp_accepting > 0 ||
+ ksocknal_find_connecting_conn_cb_locked(peer_ni) != NULL) {
+ /* the message is going to be pinned to the peer_ni */
+ tx->tx_deadline = ktime_get_seconds() +
+ ksocknal_timeout();
+
/* Queue the message until a connection is established */
- list_add_tail (&tx->tx_list, &peer->ksnp_tx_queue);
- cfs_write_unlock_bh (g_lock);
+ list_add_tail(&tx->tx_list, &peer_ni->ksnp_tx_queue);
+ write_unlock_bh(g_lock);
return 0;
- }
+ }
- cfs_write_unlock_bh (g_lock);
+ write_unlock_bh(g_lock);
/* NB Routes may be ignored if connections to them failed recently */
- CDEBUG(D_NETERROR, "No usable routes to %s\n", libcfs_id2str(id));
+ CNETERR("No usable routes to %s\n", libcfs_id2str(id));
+ tx->tx_hstatus = LNET_MSG_STATUS_REMOTE_ERROR;
return (-EHOSTUNREACH);
}
int
-ksocknal_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg)
+ksocknal_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg)
{
- int type = lntmsg->msg_type;
- lnet_process_id_t target = lntmsg->msg_target;
- unsigned int payload_niov = lntmsg->msg_niov;
- struct iovec *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;
- ksock_tx_t *tx;
- int desc_size;
- int rc;
+ /* '1' for consistency with code that checks !mpflag to restore */
+ unsigned int mpflag = 1;
+ int type = lntmsg->msg_type;
+ struct lnet_process_id target = lntmsg->msg_target;
+ unsigned int payload_niov = lntmsg->msg_niov;
+ struct bio_vec *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 %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 (!cfs_in_interrupt ());
-
- if (payload_iov != NULL)
- desc_size = offsetof(ksock_tx_t,
- tx_frags.virt.iov[1 + payload_niov]);
- else
- desc_size = offsetof(ksock_tx_t,
- tx_frags.paged.kiov[payload_niov]);
-
- tx = ksocknal_alloc_tx(desc_size);
- if (tx == NULL) {
- CERROR("Can't allocate tx desc type %d size %d\n",
- type, desc_size);
- return (-ENOMEM);
- }
-
- tx->tx_conn = NULL; /* set when assigned a conn */
- tx->tx_lnetmsg = lntmsg;
-
- if (payload_iov != NULL) {
- 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 {
- 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);
- }
+ LASSERT (payload_nob == 0 || payload_niov > 0);
+ LASSERT (payload_niov <= LNET_MAX_IOV);
+ LASSERT (!in_interrupt ());
+
+ desc_size = offsetof(struct ksock_tx,
+ tx_payload[payload_niov]);
+
+ if (lntmsg->msg_vmflush)
+ mpflag = memalloc_noreclaim_save();
+
+ 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)
+ memalloc_noreclaim_restore(mpflag);
+ return -ENOMEM;
+ }
+
+ tx->tx_conn = NULL; /* set when assigned a conn */
+ tx->tx_lnetmsg = lntmsg;
+
+ tx->tx_niov = 1;
+ tx->tx_kiov = tx->tx_payload;
+ 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;
+
+ 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;
+
+ /* The first fragment will be set later in pro_pack */
+ rc = ksocknal_launch_packet(ni, tx, target);
+ /*
+ * We can't test lntsmg->msg_vmflush again as lntmsg may
+ * have been freed.
+ */
+ if (!mpflag)
+ memalloc_noreclaim_restore(mpflag);
- ksocknal_init_msg(&tx->tx_msg, KSOCK_MSG_LNET);
-
- /* The first fragment will be set later in pro_pack */
- rc = ksocknal_launch_packet(ni, tx, target);
if (rc == 0)
return (0);
+ 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);
+ struct task_struct *task = kthread_run(fn, arg, "%s", name);
- if (pid < 0)
- return ((int)pid);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
- cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
- ksocknal_data.ksnd_nthreads++;
- cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
- return (0);
+ atomic_inc(&ksocknal_data.ksnd_nthreads);
+ return 0;
}
void
ksocknal_thread_fini (void)
{
- cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
- ksocknal_data.ksnd_nthreads--;
- cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+ if (atomic_dec_and_test(&ksocknal_data.ksnd_nthreads))
+ wake_up_var(&ksocknal_data.ksnd_nthreads);
}
int
-ksocknal_new_packet (ksock_conn_t *conn, int nob_to_skip)
+ksocknal_new_packet(struct ksock_conn *conn, int nob_to_skip)
{
static char ksocknal_slop_buffer[4096];
-
- int nob;
- unsigned int niov;
- int skipped;
+ int nob;
+ unsigned int niov;
+ int skipped;
LASSERT(conn->ksnc_proto != NULL);
ksocknal_lib_eager_ack(conn);
}
- if (nob_to_skip == 0) { /* right at next packet boundary now */
- conn->ksnc_rx_started = 0;
- cfs_mb(); /* racing with timeout thread */
+ if (nob_to_skip == 0) { /* right at next packet boundary now */
+ conn->ksnc_rx_started = 0;
+ smp_mb(); /* racing with timeout thread */
- switch (conn->ksnc_proto->pro_version) {
- case KSOCK_PROTO_V2:
+ 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 iovec *)&conn->ksnc_rx_iov_space;
+ conn->ksnc_rx_iov = (struct kvec *)&conn->ksnc_rx_iov_space;
conn->ksnc_rx_iov[0].iov_base = (char *)&conn->ksnc_msg;
- conn->ksnc_rx_nob_wanted = offsetof(ksock_msg_t, ksm_u);
- conn->ksnc_rx_nob_left = offsetof(ksock_msg_t, ksm_u);
- conn->ksnc_rx_iov[0].iov_len = offsetof(ksock_msg_t, ksm_u);
+ 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;
- case KSOCK_PROTO_V1:
- /* Receiving bare lnet_hdr_t */
- conn->ksnc_rx_state = SOCKNAL_RX_LNET_HEADER;
- conn->ksnc_rx_nob_wanted = sizeof(lnet_hdr_t);
- conn->ksnc_rx_nob_left = sizeof(lnet_hdr_t);
+ 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);
- conn->ksnc_rx_iov = (struct iovec *)&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 (lnet_hdr_t);
+ 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;
default:
/* 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;
- skipped = 0;
- niov = 0;
+ conn->ksnc_rx_state = SOCKNAL_RX_SLOP;
+ conn->ksnc_rx_nob_left = nob_to_skip;
+ conn->ksnc_rx_iov = (struct kvec *)&conn->ksnc_rx_iov_space;
+ skipped = 0;
+ niov = 0;
- do {
- nob = MIN (nob_to_skip, sizeof (ksocknal_slop_buffer));
+ do {
+ nob = min_t(int, nob_to_skip, sizeof(ksocknal_slop_buffer));
- conn->ksnc_rx_iov[niov].iov_base = ksocknal_slop_buffer;
- conn->ksnc_rx_iov[niov].iov_len = nob;
- niov++;
- skipped += nob;
- nob_to_skip -=nob;
+ conn->ksnc_rx_iov[niov].iov_base = ksocknal_slop_buffer;
+ conn->ksnc_rx_iov[niov].iov_len = nob;
+ niov++;
+ skipped += nob;
+ 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));
+ } while (nob_to_skip != 0 && /* mustn't overflow conn's rx iov */
+ niov < sizeof(conn->ksnc_rx_iov_space) / sizeof(struct kvec));
conn->ksnc_rx_niov = niov;
conn->ksnc_rx_kiov = NULL;
return (0);
}
-/* (Sink) handle incoming ZC request from sender */
-static int
-ksocknal_handle_zc_req(ksock_peer_t *peer, __u64 cookie)
-{
- ksock_conn_t *conn;
- ksock_tx_t *tx;
- ksock_sched_t *sched;
- int rc;
-
- cfs_read_lock (&ksocknal_data.ksnd_global_lock);
-
- conn = ksocknal_find_conn_locked (0, peer);
- if (conn == NULL) {
- cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
- CERROR("Can't find connection to send zcack.\n");
- return -ECONNRESET;
- }
-
- sched = conn->ksnc_scheduler;
-
- cfs_spin_lock_bh (&sched->kss_lock);
- rc = ksocknal_piggyback_zcack(conn, cookie);
- cfs_spin_unlock_bh (&sched->kss_lock);
-
- cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
- if (rc) {
- /* Ack cookie is piggybacked */
- return 0;
- }
-
- tx = ksocknal_alloc_tx(KSOCK_NOOP_TX_SIZE);
- if (tx == NULL) {
- CERROR("Can't allocate noop tx desc\n");
- return -ENOMEM;
- }
-
- 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;
-
- ksocknal_init_msg(&tx->tx_msg, KSOCK_MSG_NOOP);
- tx->tx_msg.ksm_zc_ack_cookie = cookie; /* incoming cookie */
-
- cfs_read_lock (&ksocknal_data.ksnd_global_lock);
-
- conn = ksocknal_find_conn_locked (0, peer);
- if (conn == NULL) {
- cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
- ksocknal_free_tx(tx);
- CERROR("Can't find connection to send zcack.\n");
- return -ECONNRESET;
- }
- ksocknal_queue_tx_locked(tx, conn);
-
- cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
-
- return 0;
-}
-
-/* (Sender) handle ZC_ACK from sink */
static int
-ksocknal_handle_zc_ack(ksock_peer_t *peer, __u64 cookie)
+ksocknal_process_receive(struct ksock_conn *conn,
+ struct page **rx_scratch_pgs,
+ struct kvec *scratch_iov)
{
- ksock_tx_t *tx;
- struct list_head *ctmp;
-
- cfs_spin_lock(&peer->ksnp_lock);
-
- list_for_each(ctmp, &peer->ksnp_zc_req_list) {
- tx = list_entry (ctmp, ksock_tx_t, tx_zc_list);
- if (tx->tx_msg.ksm_zc_req_cookie != cookie)
- continue;
-
- tx->tx_msg.ksm_zc_req_cookie = 0;
- list_del(&tx->tx_zc_list);
-
- cfs_spin_unlock(&peer->ksnp_lock);
-
- ksocknal_tx_decref(tx);
- return 0;
- }
- cfs_spin_unlock(&peer->ksnp_lock);
-
- return -EPROTO;
-}
+ struct lnet_hdr *lhdr;
+ struct lnet_process_id *id;
+ int rc;
+
+ LASSERT(refcount_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);
-int
-ksocknal_process_receive (ksock_conn_t *conn)
-{
- int rc;
+ if (rc <= 0) {
+ struct lnet_process_id ksnp_id;
- LASSERT (cfs_atomic_read(&conn->ksnc_conn_refcount) > 0);
+ ksnp_id = conn->ksnc_peer->ksnp_id;
- /* NB: sched lock NOT held */
- /* SOCKNAL_RX_LNET_HEADER is here for backward compatability */
- 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);
-
- if (rc <= 0) {
- LASSERT (rc != -EAGAIN);
-
- if (rc == 0)
- CDEBUG (D_NET, "[%p] EOF from %s"
- " ip %d.%d.%d.%d:%d\n", conn,
- libcfs_id2str(conn->ksnc_peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- else if (!conn->ksnc_closing)
- CERROR ("[%p] Error %d on read from %s"
- " ip %d.%d.%d.%d:%d\n",
- conn, rc,
- libcfs_id2str(conn->ksnc_peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
+ LASSERT(rc != -EAGAIN);
+ if (rc == 0)
+ CDEBUG(D_NET, "[%p] EOF from %s ip %pISp\n",
+ conn, libcfs_id2str(ksnp_id),
+ &conn->ksnc_peeraddr);
+ else if (!conn->ksnc_closing)
+ CERROR("[%p] Error %d on read from %s ip %pISp\n",
+ conn, rc, libcfs_id2str(ksnp_id),
+ &conn->ksnc_peeraddr);
/* it's not an error if conn is being closed */
ksocknal_close_conn_and_siblings (conn,
if (conn->ksnc_flip) {
__swab32s(&conn->ksnc_msg.ksm_type);
__swab32s(&conn->ksnc_msg.ksm_csum);
- __swab64s(&conn->ksnc_msg.ksm_zc_req_cookie);
- __swab64s(&conn->ksnc_msg.ksm_zc_ack_cookie);
+ __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 &&
return (-EIO);
}
- if (conn->ksnc_msg.ksm_zc_ack_cookie != 0) {
- LASSERT(conn->ksnc_proto == &ksocknal_protocol_v2x);
+ 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]);
- rc = ksocknal_handle_zc_ack(conn->ksnc_peer,
- conn->ksnc_msg.ksm_zc_ack_cookie);
if (rc != 0) {
- CERROR("%s: Unknown zero copy ACK cookie: "LPU64"\n",
+ CERROR("%s: Unknown ZC-ACK cookie: %llu, %llu\n",
libcfs_id2str(conn->ksnc_peer->ksnp_id),
- conn->ksnc_msg.ksm_zc_ack_cookie);
+ cookie, conn->ksnc_msg.ksm_zc_cookies[1]);
ksocknal_new_packet(conn, 0);
ksocknal_close_conn_and_siblings(conn, -EPROTO);
return (rc);
}
conn->ksnc_rx_state = SOCKNAL_RX_LNET_HEADER;
- conn->ksnc_rx_nob_wanted = sizeof(ksock_lnet_msg_t);
- conn->ksnc_rx_nob_left = sizeof(ksock_lnet_msg_t);
+ 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 iovec *)&conn->ksnc_rx_iov_space;
+ 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(ksock_lnet_msg_t);
+ conn->ksnc_rx_iov[0].iov_len = sizeof(struct ksock_lnet_msg);
conn->ksnc_rx_niov = 1;
conn->ksnc_rx_kiov = NULL;
conn->ksnc_proto->pro_unpack(&conn->ksnc_msg);
if ((conn->ksnc_peer->ksnp_id.pid & LNET_PID_USERFLAG) != 0) {
- /* Userspace peer */
- lnet_process_id_t *id = &conn->ksnc_peer->ksnp_id;
- lnet_hdr_t *lhdr = &conn->ksnc_msg.ksm_u.lnetmsg.ksnm_hdr;
+ /* Userspace peer_ni */
+ lhdr = &conn->ksnc_msg.ksm_u.lnetmsg.ksnm_hdr;
+ id = &conn->ksnc_peer->ksnp_id;
/* Substitute process ID assigned at connection time */
lhdr->src_pid = cpu_to_le32(id->pid);
rc = -EIO;
}
- lnet_finalize(conn->ksnc_peer->ksnp_ni, conn->ksnc_cookie, rc);
+ if (rc == 0 && conn->ksnc_msg.ksm_zc_cookies[0] != 0) {
+ LASSERT(conn->ksnc_proto != &ksocknal_protocol_v1x);
+
+ lhdr = &conn->ksnc_msg.ksm_u.lnetmsg.ksnm_hdr;
+ id = &conn->ksnc_peer->ksnp_id;
- if (rc == 0 && conn->ksnc_msg.ksm_zc_req_cookie != 0) {
- LASSERT(conn->ksnc_proto == &ksocknal_protocol_v2x);
- rc = ksocknal_handle_zc_req(conn->ksnc_peer,
- conn->ksnc_msg.ksm_zc_req_cookie);
+ 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);
}
int
-ksocknal_recv (lnet_ni_t *ni, void *private, lnet_msg_t *msg, int delayed,
- unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
- unsigned int offset, unsigned int mlen, unsigned int rlen)
+ksocknal_recv(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
+ int delayed, unsigned int niov,
+ struct bio_vec *kiov, unsigned int offset, unsigned int mlen,
+ unsigned int rlen)
{
- ksock_conn_t *conn = (ksock_conn_t *)private;
- ksock_sched_t *sched = conn->ksnc_scheduler;
+ struct ksock_conn *conn = private;
+ struct ksock_sched *sched = conn->ksnc_scheduler;
LASSERT (mlen <= rlen);
LASSERT (niov <= LNET_MAX_IOV);
- conn->ksnc_cookie = msg;
- conn->ksnc_rx_nob_wanted = mlen;
- conn->ksnc_rx_nob_left = rlen;
-
- 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 {
- 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);
- }
+ conn->ksnc_lnet_msg = msg;
+ conn->ksnc_rx_nob_wanted = mlen;
+ conn->ksnc_rx_nob_left = rlen;
+
+ if (mlen == 0) {
+ conn->ksnc_rx_nkiov = 0;
+ conn->ksnc_rx_kiov = NULL;
+ conn->ksnc_rx_iov = conn->ksnc_rx_iov_space.iov;
+ conn->ksnc_rx_niov = 0;
+ } else {
+ 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);
+ }
LASSERT (mlen ==
lnet_iov_nob (conn->ksnc_rx_niov, conn->ksnc_rx_iov) +
LASSERT (conn->ksnc_rx_scheduled);
- cfs_spin_lock_bh (&sched->kss_lock);
+ spin_lock_bh(&sched->kss_lock);
- switch (conn->ksnc_rx_state) {
- case SOCKNAL_RX_PARSE_WAIT:
- list_add_tail(&conn->ksnc_rx_list, &sched->kss_rx_conns);
- cfs_waitq_signal (&sched->kss_waitq);
- LASSERT (conn->ksnc_rx_ready);
- break;
+ 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 */
conn->ksnc_rx_state = SOCKNAL_RX_LNET_PAYLOAD;
- cfs_spin_unlock_bh (&sched->kss_lock);
- ksocknal_conn_decref(conn);
- return (0);
+ spin_unlock_bh(&sched->kss_lock);
+ ksocknal_conn_decref(conn);
+ return 0;
}
static inline int
-ksocknal_sched_cansleep(ksock_sched_t *sched)
+ksocknal_sched_cansleep(struct ksock_sched *sched)
{
- int rc;
+ int rc;
- cfs_spin_lock_bh (&sched->kss_lock);
+ spin_lock_bh(&sched->kss_lock);
- rc = (!ksocknal_data.ksnd_shuttingdown &&
- list_empty(&sched->kss_rx_conns) &&
- list_empty(&sched->kss_tx_conns));
+ rc = (!ksocknal_data.ksnd_shuttingdown &&
+ list_empty(&sched->kss_rx_conns) &&
+ list_empty(&sched->kss_tx_conns));
- cfs_spin_unlock_bh (&sched->kss_lock);
- return (rc);
+ spin_unlock_bh(&sched->kss_lock);
+ return rc;
}
-int ksocknal_scheduler (void *arg)
+int ksocknal_scheduler(void *arg)
{
- ksock_sched_t *sched = (ksock_sched_t *)arg;
- ksock_conn_t *conn;
- ksock_tx_t *tx;
- int rc;
- int nloops = 0;
- int id = (int)(sched - ksocknal_data.ksnd_schedulers);
- char name[16];
+ struct ksock_sched *sched;
+ struct ksock_conn *conn;
+ struct ksock_tx *tx;
+ int rc;
+ 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;
+ }
+
+ 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) {
+ bool did_something = false;
+
+ /* Ensure I progress everything semi-fairly */
+ conn = list_first_entry_or_null(&sched->kss_rx_conns,
+ struct ksock_conn,
+ ksnc_rx_list);
+ if (conn) {
+ 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 = true;
+ }
+
+ if (!list_empty(&sched->kss_tx_conns)) {
+ LIST_HEAD(zlist);
+
+ list_splice_init(&sched->kss_zombie_noop_txs, &zlist);
+
+ conn = list_first_entry(&sched->kss_tx_conns,
+ 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_first_entry(&conn->ksnc_tx_queue,
+ 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 = true;
+ }
+ if (!did_something || /* nothing to do */
+ need_resched()) { /* hogging CPU? */
+ spin_unlock_bh(&sched->kss_lock);
+
+ 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);
+ CFS_FREE_PTR_ARRAY(rx_scratch_pgs, LNET_MAX_IOV);
+ CFS_FREE_PTR_ARRAY(scratch_iov, LNET_MAX_IOV);
+ ksocknal_thread_fini();
+ return 0;
+}
- snprintf (name, sizeof (name),"socknal_sd%02d", id);
- cfs_daemonize (name);
- cfs_block_allsigs ();
+/*
+ * Add connection to kss_rx_conns of scheduler
+ * and wakeup the scheduler.
+ */
+void ksocknal_read_callback(struct ksock_conn *conn)
+{
+ struct ksock_sched *sched;
+ ENTRY;
- if (ksocknal_lib_bind_thread_to_cpu(id))
- CERROR ("Can't set CPU affinity for %s to %d\n", name, id);
+ sched = conn->ksnc_scheduler;
- cfs_spin_lock_bh (&sched->kss_lock);
+ 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,
- 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;
- cfs_spin_unlock_bh (&sched->kss_lock);
-
- rc = ksocknal_process_receive(conn);
-
- cfs_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);
- }
+ conn->ksnc_rx_ready = 1;
- did_something = 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 */
+ ksocknal_conn_addref(conn);
- if (!list_empty (&sched->kss_tx_conns)) {
- CFS_LIST_HEAD (zlist);
+ wake_up (&sched->kss_waitq);
+ }
+ spin_unlock_bh(&sched->kss_lock);
- if (!list_empty(&sched->kss_zombie_noop_txs)) {
- list_add(&zlist, &sched->kss_zombie_noop_txs);
- list_del_init(&sched->kss_zombie_noop_txs);
- }
+ EXIT;
+}
- conn = list_entry(sched->kss_tx_conns.next,
- ksock_conn_t, ksnc_tx_list);
- list_del (&conn->ksnc_tx_list);
+/*
+ * Add connection to kss_tx_conns of scheduler
+ * and wakeup the scheduler.
+ */
+void ksocknal_write_callback(struct ksock_conn *conn)
+{
+ struct ksock_sched *sched;
+ ENTRY;
- LASSERT(conn->ksnc_tx_scheduled);
- LASSERT(conn->ksnc_tx_ready);
- LASSERT(!list_empty(&conn->ksnc_tx_queue));
+ sched = conn->ksnc_scheduler;
- tx = list_entry(conn->ksnc_tx_queue.next,
- ksock_tx_t, tx_list);
+ spin_lock_bh(&sched->kss_lock);
- if (conn->ksnc_tx_mono == tx)
- ksocknal_next_mono_tx(conn);
+ conn->ksnc_tx_ready = 1;
- /* dequeue now so empty list => more to send */
- list_del(&tx->tx_list);
+ 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);
- /* 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;
- cfs_spin_unlock_bh (&sched->kss_lock);
+ wake_up(&sched->kss_waitq);
+ }
- 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);
- }
+ spin_unlock_bh(&sched->kss_lock);
- rc = ksocknal_process_transmit(conn, tx);
-
- if (rc == -ENOMEM || rc == -EAGAIN) {
- /* Incomplete send: replace tx on HEAD of tx_queue */
- cfs_spin_lock_bh (&sched->kss_lock);
- list_add (&tx->tx_list, &conn->ksnc_tx_queue);
- } else {
- /* Complete send; tx -ref */
- ksocknal_tx_decref (tx);
-
- cfs_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? */
- cfs_spin_unlock_bh (&sched->kss_lock);
-
- nloops = 0;
-
- if (!did_something) { /* wait for something to do */
- cfs_wait_event_interruptible_exclusive(
- sched->kss_waitq,
- !ksocknal_sched_cansleep(sched), rc);
- LASSERT (rc == 0);
- } else {
- our_cond_resched();
- }
-
- cfs_spin_lock_bh (&sched->kss_lock);
- }
- }
-
- cfs_spin_unlock_bh (&sched->kss_lock);
- 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)
-{
- ksock_sched_t *sched;
- ENTRY;
-
- sched = conn->ksnc_scheduler;
-
- cfs_spin_lock_bh (&sched->kss_lock);
-
- 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 */
- ksocknal_conn_addref(conn);
-
- cfs_waitq_signal (&sched->kss_waitq);
- }
- cfs_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)
+static const struct ksock_proto *
+ksocknal_parse_proto_version(struct ksock_hello_msg *hello)
{
- ksock_sched_t *sched;
- ENTRY;
-
- sched = conn->ksnc_scheduler;
-
- cfs_spin_lock_bh (&sched->kss_lock);
-
- conn->ksnc_tx_ready = 1;
-
- 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);
-
- cfs_waitq_signal (&sched->kss_waitq);
- }
-
- cfs_spin_unlock_bh (&sched->kss_lock);
+ __u32 version = 0;
- EXIT;
-}
+ 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);
-ksock_proto_t *
-ksocknal_parse_proto_version (ksock_hello_msg_t *hello)
-{
- if ((hello->kshm_magic == LNET_PROTO_MAGIC &&
- hello->kshm_version == KSOCK_PROTO_V2) ||
- (hello->kshm_magic == __swab32(LNET_PROTO_MAGIC) &&
- hello->kshm_version == __swab32(KSOCK_PROTO_V2))) {
+ if (version != 0) {
#if SOCKNAL_VERSION_DEBUG
- if (*ksocknal_tunables.ksnd_protocol != 2)
+ if (*ksocknal_tunables.ksnd_protocol == 1)
+ return NULL;
+
+ if (*ksocknal_tunables.ksnd_protocol == 2 &&
+ version == KSOCK_PROTO_V3)
return NULL;
#endif
- return &ksocknal_protocol_v2x;
+ if (version == KSOCK_PROTO_V2)
+ return &ksocknal_protocol_v2x;
+
+ if (version == KSOCK_PROTO_V3)
+ return &ksocknal_protocol_v3x;
+
+ return NULL;
}
if (hello->kshm_magic == le32_to_cpu(LNET_PROTO_TCP_MAGIC)) {
- lnet_magicversion_t *hmv = (lnet_magicversion_t *)hello;
+ struct lnet_magicversion *hmv;
- CLASSERT (sizeof (lnet_magicversion_t) ==
- offsetof (ksock_hello_msg_t, kshm_src_nid));
+ 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 NULL;
}
-static int
-ksocknal_send_hello_v1 (ksock_conn_t *conn, ksock_hello_msg_t *hello)
-{
- cfs_socket_t *sock = conn->ksnc_sock;
- lnet_hdr_t *hdr;
- lnet_magicversion_t *hmv;
- int rc;
- int i;
-
- CLASSERT(sizeof(lnet_magicversion_t) == offsetof(lnet_hdr_t, src_nid));
-
- LIBCFS_ALLOC(hdr, sizeof(*hdr));
- if (hdr == NULL) {
- CERROR("Can't allocate lnet_hdr_t\n");
- return -ENOMEM;
- }
-
- hmv = (lnet_magicversion_t *)&hdr->dest_nid;
-
- /* Re-organize V2.x message header to V1.x (lnet_hdr_t)
- * header and send out */
- hmv->magic = cpu_to_le32 (LNET_PROTO_TCP_MAGIC);
- hmv->version_major = cpu_to_le16 (KSOCK_PROTO_V1_MAJOR);
- hmv->version_minor = cpu_to_le16 (KSOCK_PROTO_V1_MINOR);
-
- if (the_lnet.ln_testprotocompat != 0) {
- /* single-shot proto check */
- LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
- hmv->version_major++; /* just different! */
- the_lnet.ln_testprotocompat &= ~1;
- }
- if ((the_lnet.ln_testprotocompat & 2) != 0) {
- hmv->magic = LNET_PROTO_MAGIC;
- the_lnet.ln_testprotocompat &= ~2;
- }
- LNET_UNLOCK();
- }
-
- hdr->src_nid = cpu_to_le64 (hello->kshm_src_nid);
- hdr->src_pid = cpu_to_le32 (hello->kshm_src_pid);
- hdr->type = cpu_to_le32 (LNET_MSG_HELLO);
- hdr->payload_length = cpu_to_le32 (hello->kshm_nips * sizeof(__u32));
- hdr->msg.hello.type = cpu_to_le32 (hello->kshm_ctype);
- hdr->msg.hello.incarnation = cpu_to_le64 (hello->kshm_src_incarnation);
-
- rc = libcfs_sock_write(sock, hdr, sizeof(*hdr), lnet_acceptor_timeout());
-
- if (rc != 0) {
- CDEBUG (D_NETERROR, "Error %d sending HELLO hdr to %u.%u.%u.%u/%d\n",
- rc, HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
- goto out;
- }
-
- if (hello->kshm_nips == 0)
- goto out;
-
- for (i = 0; i < (int) hello->kshm_nips; i++) {
- hello->kshm_ips[i] = __cpu_to_le32 (hello->kshm_ips[i]);
- }
-
- rc = libcfs_sock_write(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32),
- lnet_acceptor_timeout());
- if (rc != 0) {
- CDEBUG (D_NETERROR, "Error %d sending HELLO payload (%d)"
- " to %u.%u.%u.%u/%d\n", rc, hello->kshm_nips,
- HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
- }
-out:
- LIBCFS_FREE(hdr, sizeof(*hdr));
-
- return rc;
-}
-
-static int
-ksocknal_send_hello_v2 (ksock_conn_t *conn, ksock_hello_msg_t *hello)
-{
- cfs_socket_t *sock = conn->ksnc_sock;
- int rc;
-
- hello->kshm_magic = LNET_PROTO_MAGIC;
- hello->kshm_version = KSOCK_PROTO_V2;
-
- if (the_lnet.ln_testprotocompat != 0) {
- /* single-shot proto check */
- LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
- hello->kshm_version++; /* just different! */
- the_lnet.ln_testprotocompat &= ~1;
- }
- LNET_UNLOCK();
- }
-
- rc = libcfs_sock_write(sock, hello, offsetof(ksock_hello_msg_t, kshm_ips),
- lnet_acceptor_timeout());
-
- if (rc != 0) {
- CDEBUG (D_NETERROR, "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_nips == 0)
- return 0;
-
- rc = libcfs_sock_write(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32),
- lnet_acceptor_timeout());
- if (rc != 0) {
- CDEBUG (D_NETERROR, "Error %d sending HELLO payload (%d)"
- " to %u.%u.%u.%u/%d\n", rc, hello->kshm_nips,
- HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
- }
-
- return rc;
-}
-
-static int
-ksocknal_recv_hello_v1(ksock_conn_t *conn, ksock_hello_msg_t *hello,int timeout)
-{
- cfs_socket_t *sock = conn->ksnc_sock;
- lnet_hdr_t *hdr;
- int rc;
- int i;
-
- LIBCFS_ALLOC(hdr, sizeof(*hdr));
- if (hdr == NULL) {
- CERROR("Can't allocate lnet_hdr_t\n");
- return -ENOMEM;
- }
-
- rc = libcfs_sock_read(sock, &hdr->src_nid,
- sizeof (*hdr) - offsetof (lnet_hdr_t, src_nid),
- timeout);
- if (rc != 0) {
- CERROR ("Error %d reading rest of HELLO hdr from %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- LASSERT (rc < 0 && rc != -EALREADY);
- goto out;
- }
-
- /* ...and check we got what we expected */
- if (hdr->type != cpu_to_le32 (LNET_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));
- rc = -EPROTO;
- goto out;
- }
-
- hello->kshm_src_nid = le64_to_cpu (hdr->src_nid);
- hello->kshm_src_pid = le32_to_cpu (hdr->src_pid);
- hello->kshm_src_incarnation = le64_to_cpu (hdr->msg.hello.incarnation);
- hello->kshm_ctype = le32_to_cpu (hdr->msg.hello.type);
- hello->kshm_nips = le32_to_cpu (hdr->payload_length) /
- sizeof (__u32);
-
- if (hello->kshm_nips > LNET_MAX_INTERFACES) {
- CERROR("Bad nips %d from ip %u.%u.%u.%u\n",
- hello->kshm_nips, HIPQUAD(conn->ksnc_ipaddr));
- rc = -EPROTO;
- goto out;
- }
-
- if (hello->kshm_nips == 0)
- goto out;
-
- rc = libcfs_sock_read(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32), timeout);
- if (rc != 0) {
- CERROR ("Error %d reading IPs from ip %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- LASSERT (rc < 0 && rc != -EALREADY);
- goto out;
- }
-
- for (i = 0; i < (int) hello->kshm_nips; i++) {
- hello->kshm_ips[i] = __le32_to_cpu(hello->kshm_ips[i]);
-
- if (hello->kshm_ips[i] == 0) {
- CERROR("Zero IP[%d] from ip %u.%u.%u.%u\n",
- i, HIPQUAD(conn->ksnc_ipaddr));
- rc = -EPROTO;
- break;
- }
- }
-out:
- LIBCFS_FREE(hdr, sizeof(*hdr));
-
- return rc;
-}
-
-static int
-ksocknal_recv_hello_v2 (ksock_conn_t *conn, ksock_hello_msg_t *hello, int timeout)
-{
- cfs_socket_t *sock = conn->ksnc_sock;
- int rc;
- int i;
-
- if (hello->kshm_magic == LNET_PROTO_MAGIC)
- conn->ksnc_flip = 0;
- else
- conn->ksnc_flip = 1;
-
- rc = libcfs_sock_read(sock, &hello->kshm_src_nid,
- offsetof(ksock_hello_msg_t, kshm_ips) -
- offsetof(ksock_hello_msg_t, kshm_src_nid),
- timeout);
- if (rc != 0) {
- CERROR ("Error %d reading HELLO from %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- LASSERT (rc < 0 && rc != -EALREADY);
- return rc;
- }
-
- if (conn->ksnc_flip) {
- __swab32s(&hello->kshm_src_pid);
- __swab64s(&hello->kshm_src_nid);
- __swab32s(&hello->kshm_dst_pid);
- __swab64s(&hello->kshm_dst_nid);
- __swab64s(&hello->kshm_src_incarnation);
- __swab64s(&hello->kshm_dst_incarnation);
- __swab32s(&hello->kshm_ctype);
- __swab32s(&hello->kshm_nips);
- }
-
- if (hello->kshm_nips > LNET_MAX_INTERFACES) {
- CERROR("Bad nips %d from ip %u.%u.%u.%u\n",
- hello->kshm_nips, HIPQUAD(conn->ksnc_ipaddr));
- return -EPROTO;
- }
-
- if (hello->kshm_nips == 0)
- return 0;
-
- rc = libcfs_sock_read(sock, hello->kshm_ips,
- hello->kshm_nips * sizeof(__u32), timeout);
- if (rc != 0) {
- CERROR ("Error %d reading IPs from ip %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- LASSERT (rc < 0 && rc != -EALREADY);
- return rc;
- }
-
- for (i = 0; i < (int) hello->kshm_nips; i++) {
- if (conn->ksnc_flip)
- __swab32s(&hello->kshm_ips[i]);
-
- if (hello->kshm_ips[i] == 0) {
- CERROR("Zero IP[%d] from ip %u.%u.%u.%u\n",
- i, HIPQUAD(conn->ksnc_ipaddr));
- return -EPROTO;
- }
- }
-
- return 0;
-}
-
-static void
-ksocknal_pack_msg_v1(ksock_tx_t *tx)
-{
- /* V1.x has no KSOCK_MSG_NOOP */
- LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
- LASSERT(tx->tx_lnetmsg != NULL);
-
- tx->tx_iov[0].iov_base = (void *)&tx->tx_lnetmsg->msg_hdr;
- tx->tx_iov[0].iov_len = sizeof(lnet_hdr_t);
-
- tx->tx_resid = tx->tx_nob = tx->tx_lnetmsg->msg_len + sizeof(lnet_hdr_t);
-}
-
-static void
-ksocknal_pack_msg_v2(ksock_tx_t *tx)
-{
- tx->tx_iov[0].iov_base = (void *)&tx->tx_msg;
-
- if (tx->tx_lnetmsg != NULL) {
- LASSERT(tx->tx_msg.ksm_type != KSOCK_MSG_NOOP);
-
- tx->tx_msg.ksm_u.lnetmsg.ksnm_hdr = tx->tx_lnetmsg->msg_hdr;
- tx->tx_iov[0].iov_len = sizeof(ksock_msg_t);
- tx->tx_resid = tx->tx_nob = sizeof(ksock_msg_t) + tx->tx_lnetmsg->msg_len;
- } else {
- LASSERT(tx->tx_msg.ksm_type == KSOCK_MSG_NOOP);
-
- tx->tx_iov[0].iov_len = offsetof(ksock_msg_t, ksm_u.lnetmsg.ksnm_hdr);
- tx->tx_resid = tx->tx_nob = offsetof(ksock_msg_t, ksm_u.lnetmsg.ksnm_hdr);
- }
- /* Don't checksum before start sending, because packet can be piggybacked with ACK */
-}
-
-static void
-ksocknal_unpack_msg_v1(ksock_msg_t *msg)
-{
- msg->ksm_type = KSOCK_MSG_LNET;
- msg->ksm_csum = 0;
- msg->ksm_zc_req_cookie = 0;
- msg->ksm_zc_ack_cookie = 0;
-}
-
-static void
-ksocknal_unpack_msg_v2(ksock_msg_t *msg)
-{
- return; /* Do nothing */
-}
-
-ksock_proto_t ksocknal_protocol_v1x =
-{
- KSOCK_PROTO_V1,
- ksocknal_send_hello_v1,
- ksocknal_recv_hello_v1,
- ksocknal_pack_msg_v1,
- ksocknal_unpack_msg_v1
-};
-
-ksock_proto_t ksocknal_protocol_v2x =
-{
- KSOCK_PROTO_V2,
- ksocknal_send_hello_v2,
- ksocknal_recv_hello_v2,
- ksocknal_pack_msg_v2,
- ksocknal_unpack_msg_v2
-};
-
int
-ksocknal_send_hello (lnet_ni_t *ni, ksock_conn_t *conn,
- lnet_nid_t peer_nid, ksock_hello_msg_t *hello)
+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' */
- ksock_net_t *net = (ksock_net_t *)ni->ni_data;
+ /* CAVEAT EMPTOR: this byte flips 'ipaddrs' */
+ struct ksock_net *net = (struct ksock_net *)ni->ni_data;
- LASSERT (hello->kshm_nips <= LNET_MAX_INTERFACES);
+ 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);
+ /* 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_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;
+ hello->kshm_src_incarnation = net->ksnn_incarnation;
+ hello->kshm_ctype = conn->ksnc_type;
- return conn->ksnc_proto->pro_send_hello(conn, hello);
+ return conn->ksnc_proto->pro_send_hello(conn, hello);
}
-int
+static int
ksocknal_invert_type(int type)
{
switch (type)
}
int
-ksocknal_recv_hello (lnet_ni_t *ni, ksock_conn_t *conn,
- ksock_hello_msg_t *hello, lnet_process_id_t *peerid,
- __u64 *incarnation)
+ksocknal_recv_hello(struct lnet_ni *ni, struct ksock_conn *conn,
+ struct ksock_hello_msg *hello,
+ struct lnet_process_id *peerid,
+ __u64 *incarnation)
{
/* Return < 0 fatal error
* 0 success
* EALREADY lost connection race
* EPROTO protocol version mismatch
*/
- cfs_socket_t *sock = conn->ksnc_sock;
+ struct socket *sock = conn->ksnc_sock;
int active = (conn->ksnc_proto != NULL);
int timeout;
int proto_match;
int rc;
- ksock_proto_t *proto;
- lnet_process_id_t recv_id;
-
- /* socket type set on active connections - not set on passive */
- LASSERT (!active == !(conn->ksnc_type != SOCKLND_CONN_NONE));
-
- timeout = active ? *ksocknal_tunables.ksnd_timeout :
- lnet_acceptor_timeout();
-
- rc = libcfs_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));
- LASSERT (rc < 0);
- return rc;
- }
-
- 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 "
- "%u.%u.%u.%u\n", __cpu_to_le32 (hello->kshm_magic),
- LNET_PROTO_TCP_MAGIC,
- HIPQUAD(conn->ksnc_ipaddr));
- return -EPROTO;
- }
-
- rc = libcfs_sock_read(sock, &hello->kshm_version,
- sizeof(hello->kshm_version), timeout);
+ const 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 ? ksocknal_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 %pIS\n",
+ rc, &conn->ksnc_peeraddr);
+ LASSERT(rc < 0);
+ return rc;
+ }
+
+ 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 %pIS\n",
+ __cpu_to_le32 (hello->kshm_magic),
+ LNET_PROTO_TCP_MAGIC, &conn->ksnc_peeraddr);
+ return -EPROTO;
+ }
+
+ rc = lnet_sock_read(sock, &hello->kshm_version,
+ sizeof(hello->kshm_version), timeout);
if (rc != 0) {
- CERROR ("Error %d reading HELLO from %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
- LASSERT (rc < 0);
+ CERROR("Error %d reading HELLO from %pIS\n",
+ rc, &conn->ksnc_peeraddr);
+ LASSERT(rc < 0);
return rc;
}
proto = ksocknal_parse_proto_version(hello);
if (proto == NULL) {
if (!active) {
- /* unknown protocol from peer, tell peer my protocol */
- conn->ksnc_proto = &ksocknal_protocol_v2x;
+ /* 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)
+ 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 %u.%u.%u.%u\n",
- conn->ksnc_proto->pro_version,
- HIPQUAD(conn->ksnc_ipaddr));
+ CERROR("Unknown protocol version (%d.x expected) from %pIS\n",
+ conn->ksnc_proto->pro_version, &conn->ksnc_peeraddr);
return -EPROTO;
}
/* receive the rest of hello message anyway */
rc = conn->ksnc_proto->pro_recv_hello(conn, hello, timeout);
if (rc != 0) {
- CERROR("Error %d reading or checking hello from from %u.%u.%u.%u\n",
- rc, HIPQUAD(conn->ksnc_ipaddr));
+ CERROR("Error %d reading or checking hello from from %pIS\n",
+ rc, &conn->ksnc_peeraddr);
LASSERT (rc < 0);
return rc;
}
*incarnation = hello->kshm_src_incarnation;
- if (hello->kshm_src_nid == LNET_NID_ANY) {
- CERROR("Expecting a HELLO hdr with a NID, but got LNET_NID_ANY"
- "from %u.%u.%u.%u\n", HIPQUAD(conn->ksnc_ipaddr));
- return -EPROTO;
- }
-
- if (!active &&
- conn->ksnc_port > LNET_ACCEPTOR_MAX_RESERVED_PORT) {
- /* Userspace NAL assigns peer 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 (hello->kshm_src_nid == LNET_NID_ANY) {
+ CERROR("Expecting a HELLO hdr with a NID, but got LNET_NID_ANY from %pIS\n",
+ &conn->ksnc_peeraddr);
+ return -EPROTO;
+ }
+
+ if (!active &&
+ rpc_get_port((struct sockaddr *)&conn->ksnc_peeraddr) >
+ LNET_ACCEPTOR_MAX_RESERVED_PORT) {
+ /* Userspace NAL assigns peer_ni process ID from socket */
+ recv_id.pid = rpc_get_port((struct sockaddr *)
+ &conn->ksnc_peeraddr) |
+ LNET_PID_USERFLAG;
+ LASSERT(conn->ksnc_peeraddr.ss_family == AF_INET);
+ recv_id.nid = LNET_MKNID(
+ LNET_NIDNET(ni->ni_nid),
+ ntohl(((struct sockaddr_in *)
+ &conn->ksnc_peeraddr)->sin_addr.s_addr));
+ } else {
+ recv_id.nid = hello->kshm_src_nid;
+ recv_id.pid = hello->kshm_src_pid;
+ }
if (!active) {
*peerid = recv_id;
- /* peer 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 %u.%u.%u.%u\n",
- hello->kshm_ctype, libcfs_id2str(*peerid),
- HIPQUAD(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"
- " %u.%u.%u.%u, but they claimed they were "
- "%s; please check your Lustre "
- "configuration.\n",
- libcfs_id2str(*peerid),
- HIPQUAD(conn->ksnc_ipaddr),
- libcfs_id2str(recv_id));
- return -EPROTO;
- }
+ /* 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 %pIS\n",
+ hello->kshm_ctype, libcfs_id2str(*peerid),
+ &conn->ksnc_peeraddr);
+ 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 %pIS, but they claimed they were %s; please check your Lustre configuration.\n",
+ libcfs_id2str(*peerid),
+ &conn->ksnc_peeraddr,
+ 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 %u.%u.%u.%u %d\n",
- conn->ksnc_type, libcfs_id2str(*peerid),
- HIPQUAD(conn->ksnc_ipaddr),
- hello->kshm_ctype);
- return -EPROTO;
- }
-
- return 0;
+ if (ksocknal_invert_type(hello->kshm_ctype) != conn->ksnc_type) {
+ CERROR("Mismatched types: me %d, %s ip %pIS %d\n",
+ conn->ksnc_type, libcfs_id2str(*peerid),
+ &conn->ksnc_peeraddr,
+ hello->kshm_ctype);
+ return -EPROTO;
+ }
+ return 0;
}
-void
-ksocknal_connect (ksock_route_t *route)
+static bool
+ksocknal_connect(struct ksock_conn_cb *conn_cb)
{
- CFS_LIST_HEAD (zombies);
- ksock_peer_t *peer = route->ksnr_peer;
- int type;
- int wanted;
- cfs_socket_t *sock;
- cfs_time_t deadline;
- int retry_later = 0;
- int rc = 0;
-
- deadline = cfs_time_add(cfs_time_current(),
- cfs_time_seconds(*ksocknal_tunables.ksnd_timeout));
+ LIST_HEAD(zombies);
+ struct ksock_peer_ni *peer_ni = conn_cb->ksnr_peer;
+ int type;
+ int wanted;
+ struct socket *sock;
+ time64_t deadline;
+ bool retry_later = false;
+ int rc = 0;
+
+ deadline = ktime_get_seconds() + ksocknal_timeout();
+
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
+
+ LASSERT(conn_cb->ksnr_scheduled);
+ LASSERT(!conn_cb->ksnr_connecting);
+
+ conn_cb->ksnr_connecting = 1;
+
+ for (;;) {
+ wanted = ksocknal_conn_cb_mask() & ~conn_cb->ksnr_connected;
+
+ /* stop connecting if peer_ni/cb got closed under me, or
+ * conn cb got connected while queued
+ */
+ if (peer_ni->ksnp_closing || conn_cb->ksnr_deleted ||
+ wanted == 0) {
+ retry_later = false;
+ break;
+ }
+
+ /* 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 = true;
+ }
+
+ if (retry_later) /* needs reschedule */
+ break;
+
+ if ((wanted & BIT(SOCKLND_CONN_ANY)) != 0) {
+ type = SOCKLND_CONN_ANY;
+ } else if ((wanted & BIT(SOCKLND_CONN_CONTROL)) != 0) {
+ type = SOCKLND_CONN_CONTROL;
+ } else if ((wanted & BIT(SOCKLND_CONN_BULK_IN)) != 0 &&
+ conn_cb->ksnr_blki_conn_count <= conn_cb->ksnr_blko_conn_count) {
+ type = SOCKLND_CONN_BULK_IN;
+ } else {
+ LASSERT ((wanted & BIT(SOCKLND_CONN_BULK_OUT)) != 0);
+ type = SOCKLND_CONN_BULK_OUT;
+ }
+
+ 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,
+ (struct sockaddr *)
+ &conn_cb->ksnr_addr);
+ goto failed;
+ }
+
+ sock = lnet_connect(peer_ni->ksnp_id.nid,
+ conn_cb->ksnr_myiface,
+ (struct sockaddr *)&conn_cb->ksnr_addr,
+ peer_ni->ksnp_ni->ni_net_ns);
+ if (IS_ERR(sock)) {
+ rc = PTR_ERR(sock);
+ goto failed;
+ }
+
+ rc = ksocknal_create_conn(peer_ni->ksnp_ni, conn_cb, sock,
+ type);
+ if (rc < 0) {
+ lnet_connect_console_error(rc, peer_ni->ksnp_id.nid,
+ (struct sockaddr *)
+ &conn_cb->ksnr_addr);
+ 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);
+ }
+
+ conn_cb->ksnr_scheduled = 0;
+ conn_cb->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
+ */
+ conn_cb->ksnr_retry_interval =
+ *ksocknal_tunables.ksnd_min_reconnectms / 1000;
+ conn_cb->ksnr_timeout = ktime_get_seconds() +
+ conn_cb->ksnr_retry_interval;
+ }
+
+ ksocknal_launch_connection_locked(conn_cb);
+ }
+
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+ return retry_later;
- cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
+ failed:
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
+
+ conn_cb->ksnr_scheduled = 0;
+ conn_cb->ksnr_connecting = 0;
+
+ /* This is a retry rather than a new connection */
+ conn_cb->ksnr_retry_interval *= 2;
+ conn_cb->ksnr_retry_interval =
+ max_t(time64_t, conn_cb->ksnr_retry_interval,
+ *ksocknal_tunables.ksnd_min_reconnectms / 1000);
+ conn_cb->ksnr_retry_interval =
+ min_t(time64_t, conn_cb->ksnr_retry_interval,
+ *ksocknal_tunables.ksnd_max_reconnectms / 1000);
+
+ LASSERT(conn_cb->ksnr_retry_interval);
+ conn_cb->ksnr_timeout = ktime_get_seconds() +
+ conn_cb->ksnr_retry_interval;
+
+ if (!list_empty(&peer_ni->ksnp_tx_queue) &&
+ peer_ni->ksnp_accepting == 0 &&
+ !ksocknal_find_connecting_conn_cb_locked(peer_ni)) {
+ struct ksock_conn *conn;
+
+ /* ksnp_tx_queue is queued on a conn on successful
+ * connection for V1.x and V2.x
+ */
+ conn = list_first_entry_or_null(&peer_ni->ksnp_conns,
+ struct ksock_conn, ksnc_list);
+ if (conn)
+ LASSERT(conn->ksnc_proto == &ksocknal_protocol_v3x);
+
+ /* take all the blocked packets while I've got the lock and
+ * complete below...
+ */
+ list_splice_init(&peer_ni->ksnp_tx_queue, &zombies);
+ }
+
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
+
+ ksocknal_peer_failed(peer_ni);
+ ksocknal_txlist_done(peer_ni->ksnp_ni, &zombies, rc);
+ return 0;
+}
- LASSERT (route->ksnr_scheduled);
- LASSERT (!route->ksnr_connecting);
+/*
+ * 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)
+{
+ char name[16];
+ int rc;
+ int total = ksocknal_data.ksnd_connd_starting +
+ ksocknal_data.ksnd_connd_running;
- route->ksnr_connecting = 1;
+ if (unlikely(ksocknal_data.ksnd_init < SOCKNAL_INIT_ALL)) {
+ /* still in initializing */
+ return 0;
+ }
- for (;;) {
- wanted = ksocknal_route_mask() & ~route->ksnr_connected;
+ 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;
+ }
- /* stop connecting if peer/route got closed under me, or
- * route got connected while queued */
- if (peer->ksnp_closing || route->ksnr_deleted ||
- wanted == 0) {
- retry_later = 0;
- break;
- }
+ if (list_empty(&ksocknal_data.ksnd_connd_routes)) {
+ /* no pending connecting request */
+ return 0;
+ }
- /* reschedule if peer is connecting to me */
- if (peer->ksnp_accepting > 0) {
- CDEBUG(D_NET,
- "peer %s(%d) already connecting to me, retry later.\n",
- libcfs_nid2str(peer->ksnp_id.nid), peer->ksnp_accepting);
- retry_later = 1;
- }
+ if (sec - ksocknal_data.ksnd_connd_failed_stamp <= 1) {
+ /* may run out of resource, retry later */
+ *timeout = cfs_time_seconds(1);
+ return 0;
+ }
- if (retry_later) /* needs reschedule */
- break;
+ if (ksocknal_data.ksnd_connd_starting > 0) {
+ /* serialize starting to avoid flood */
+ return 0;
+ }
- 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;
- }
+ ksocknal_data.ksnd_connd_starting_stamp = sec;
+ ksocknal_data.ksnd_connd_starting++;
+ spin_unlock_bh(&ksocknal_data.ksnd_connd_lock);
- cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+ /* NB: total is the next id */
+ snprintf(name, sizeof(name), "socknal_cd%02d", total);
+ rc = ksocknal_thread_start(ksocknal_connd, NULL, name);
- if (cfs_time_aftereq(cfs_time_current(), deadline)) {
- rc = -ETIMEDOUT;
- lnet_connect_console_error(rc, peer->ksnp_id.nid,
- route->ksnr_ipaddr,
- route->ksnr_port);
- goto failed;
- }
+ spin_lock_bh(&ksocknal_data.ksnd_connd_lock);
+ if (rc == 0)
+ return 1;
- rc = lnet_connect(&sock, peer->ksnp_id.nid,
- route->ksnr_myipaddr,
- route->ksnr_ipaddr, route->ksnr_port);
- if (rc != 0)
- goto failed;
+ /* we tried ... */
+ LASSERT(ksocknal_data.ksnd_connd_starting > 0);
+ ksocknal_data.ksnd_connd_starting--;
+ ksocknal_data.ksnd_connd_failed_stamp = ktime_get_real_seconds();
- rc = ksocknal_create_conn(peer->ksnp_ni, route, sock, type);
- if (rc < 0) {
- lnet_connect_console_error(rc, peer->ksnp_id.nid,
- route->ksnr_ipaddr,
- route->ksnr_port);
- goto failed;
- }
+ return 1;
+}
- /* 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 %s: conn race, retry later.\n",
- libcfs_nid2str(peer->ksnp_id.nid));
+/*
+ * 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;
- cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
+ if (unlikely(ksocknal_data.ksnd_init < SOCKNAL_INIT_ALL)) {
+ /* still in initializing */
+ return 0;
}
- route->ksnr_scheduled = 0;
- route->ksnr_connecting = 0;
+ if (ksocknal_data.ksnd_connd_starting > 0) {
+ /* in progress of starting new thread */
+ return 0;
+ }
- if (retry_later) {
- /* re-queue for attention; this frees me up to handle
- * the peer's incoming connection request */
- ksocknal_launch_connection_locked(route);
+ if (ksocknal_data.ksnd_connd_running <=
+ *ksocknal_tunables.ksnd_nconnds) { /* can't shrink */
+ return 0;
}
- cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
- return;
+ /* created thread in past 120 seconds? */
+ val = (int)(ksocknal_data.ksnd_connd_starting_stamp +
+ SOCKNAL_CONND_TIMEOUT - sec);
- failed:
- cfs_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(route->ksnr_retry_interval,
- cfs_time_seconds(*ksocknal_tunables.ksnd_min_reconnectms)/1000);
- route->ksnr_retry_interval =
- MIN(route->ksnr_retry_interval,
- cfs_time_seconds(*ksocknal_tunables.ksnd_max_reconnectms)/1000);
-
- LASSERT (route->ksnr_retry_interval != 0);
- route->ksnr_timeout = cfs_time_add(cfs_time_current(),
- route->ksnr_retry_interval);
-
- if (!list_empty(&peer->ksnp_tx_queue) &&
- peer->ksnp_accepting == 0 &&
- ksocknal_find_connecting_route_locked(peer) == NULL) {
- /* ksnp_tx_queue is queued on a conn on successful
- * connection */
- LASSERT (list_empty (&peer->ksnp_conns));
-
- /* take all the blocked packets while I've got the lock and
- * complete below... */
- list_add(&zombies, &peer->ksnp_tx_queue);
- list_del_init(&peer->ksnp_tx_queue);
- }
+ *timeout = (val > 0) ? cfs_time_seconds(val) :
+ cfs_time_seconds(SOCKNAL_CONND_TIMEOUT);
+ if (val > 0)
+ 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);
- }
-#endif
- cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+ /* no creating in past 120 seconds */
- ksocknal_peer_failed(peer);
- ksocknal_txlist_done(peer->ksnp_ni, &zombies, 1);
+ return ksocknal_data.ksnd_connd_running >
+ ksocknal_data.ksnd_connd_connecting + SOCKNAL_CONND_RESV;
}
-static inline int
-ksocknal_connd_connect_route_locked(void)
+/* Go through connd_cbs queue looking for a conn_cb that we can process
+ * right now, @timeout_p can be updated if we need to come back later */
+static struct ksock_conn_cb *
+ksocknal_connd_get_conn_cb_locked(signed long *timeout_p)
{
- /* Only handle an outgoing connection request if there is someone left
- * to handle incoming connections */
- return !list_empty(&ksocknal_data.ksnd_connd_routes) &&
- ((ksocknal_data.ksnd_connd_connecting + 1) <
- *ksocknal_tunables.ksnd_nconnds);
-}
+ time64_t now = ktime_get_seconds();
+ time64_t conn_timeout;
+ struct ksock_conn_cb *conn_cb;
-static inline int
-ksocknal_connd_ready(void)
-{
- int rc;
+ /* connd_routes can contain both pending and ordinary routes */
+ list_for_each_entry(conn_cb, &ksocknal_data.ksnd_connd_routes,
+ ksnr_connd_list) {
- cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
+ conn_timeout = conn_cb->ksnr_timeout;
- rc = ksocknal_data.ksnd_shuttingdown ||
- !list_empty(&ksocknal_data.ksnd_connd_connreqs) ||
- ksocknal_connd_connect_route_locked();
+ if (conn_cb->ksnr_retry_interval == 0 ||
+ now >= conn_timeout)
+ return conn_cb;
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ if (*timeout_p == MAX_SCHEDULE_TIMEOUT ||
+ *timeout_p > cfs_time_seconds(conn_timeout - now))
+ *timeout_p = cfs_time_seconds(conn_timeout - now);
+ }
- return rc;
+ return NULL;
}
int
-ksocknal_connd (void *arg)
+ksocknal_connd(void *arg)
{
- long id = (long)(long_ptr_t)arg;
- char name[16];
- ksock_connreq_t *cr;
- ksock_route_t *route;
- int rc = 0;
-
- snprintf (name, sizeof (name), "socknal_cd%02ld", id);
- cfs_daemonize (name);
- cfs_block_allsigs ();
-
- cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
-
- while (!ksocknal_data.ksnd_shuttingdown) {
+ spinlock_t *connd_lock = &ksocknal_data.ksnd_connd_lock;
+ struct ksock_connreq *cr;
+ wait_queue_entry_t wait;
+ int cons_retry = 0;
+
+ init_wait(&wait);
+
+ spin_lock_bh(connd_lock);
+
+ LASSERT(ksocknal_data.ksnd_connd_starting > 0);
+ ksocknal_data.ksnd_connd_starting--;
+ ksocknal_data.ksnd_connd_running++;
+
+ while (!ksocknal_data.ksnd_shuttingdown) {
+ struct ksock_conn_cb *conn_cb = NULL;
+ time64_t sec = ktime_get_real_seconds();
+ long timeout = MAX_SCHEDULE_TIMEOUT;
+ bool dropped_lock = false;
+
+ if (ksocknal_connd_check_stop(sec, &timeout)) {
+ /* wakeup another one to check stop */
+ wake_up(&ksocknal_data.ksnd_connd_waitq);
+ break;
+ }
+
+ if (ksocknal_connd_check_start(sec, &timeout)) {
+ /* created new thread */
+ dropped_lock = true;
+ }
+
+ cr = list_first_entry_or_null(&ksocknal_data.ksnd_connd_connreqs,
+ struct ksock_connreq, ksncr_list);
+ if (cr) {
+ /* Connection accepted by the listener */
+ list_del(&cr->ksncr_list);
+ spin_unlock_bh(connd_lock);
+ dropped_lock = true;
+
+ 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_lock_bh(connd_lock);
+ }
+
+ /* 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)
+ conn_cb = ksocknal_connd_get_conn_cb_locked(&timeout);
+
+ if (conn_cb) {
+ list_del(&conn_cb->ksnr_connd_list);
+ ksocknal_data.ksnd_connd_connecting++;
+ spin_unlock_bh(connd_lock);
+ dropped_lock = true;
+
+ if (ksocknal_connect(conn_cb)) {
+ /* consecutive retry */
+ if (cons_retry++ > SOCKNAL_INSANITY_RECONN) {
+ CWARN("massive consecutive re-connecting to %pIS\n",
+ &conn_cb->ksnr_addr);
+ cons_retry = 0;
+ }
+ } else {
+ cons_retry = 0;
+ }
+
+ ksocknal_conn_cb_decref(conn_cb);
+
+ spin_lock_bh(connd_lock);
+ ksocknal_data.ksnd_connd_connecting--;
+ }
+
+ if (dropped_lock) {
+ if (!need_resched())
+ continue;
+ spin_unlock_bh(connd_lock);
+ 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);
+
+ schedule_timeout(timeout);
+
+ 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;
+}
- if (!list_empty(&ksocknal_data.ksnd_connd_connreqs)) {
- /* Connection accepted by the listener */
- cr = list_entry(ksocknal_data.ksnd_connd_connreqs.next,
- ksock_connreq_t, ksncr_list);
+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 */
+ struct ksock_conn *conn;
+ struct list_head *ctmp;
+ struct ksock_tx *tx;
- list_del(&cr->ksncr_list);
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ list_for_each(ctmp, &peer_ni->ksnp_conns) {
+ int error;
- ksocknal_create_conn(cr->ksncr_ni, NULL,
- cr->ksncr_sock, SOCKLND_CONN_NONE);
- lnet_ni_decref(cr->ksncr_ni);
- LIBCFS_FREE(cr, sizeof(*cr));
+ conn = list_entry(ctmp, struct ksock_conn, ksnc_list);
- cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
- }
+ /* Don't need the {get,put}connsock dance to deref ksnc_sock */
+ LASSERT (!conn->ksnc_closing);
- if (ksocknal_connd_connect_route_locked()) {
- /* Connection request */
- route = list_entry (ksocknal_data.ksnd_connd_routes.next,
- ksock_route_t, ksnr_connd_list);
+ error = conn->ksnc_sock->sk->sk_err;
+ if (error != 0) {
+ ksocknal_conn_addref(conn);
- list_del (&route->ksnr_connd_list);
- ksocknal_data.ksnd_connd_connecting++;
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ switch (error) {
+ case ECONNRESET:
+ CNETERR("A connection with %s (%pISp) was reset; it may have rebooted.\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_peeraddr);
+ break;
+ case ETIMEDOUT:
+ CNETERR("A connection with %s (%pISp) timed out; the network or node may be down.\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_peeraddr);
+ break;
+ default:
+ CNETERR("An unexpected network error %d occurred with %s (%pISp\n",
+ error,
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_peeraddr);
+ break;
+ }
+
+ return conn;
+ }
+
+ if (conn->ksnc_rx_started &&
+ ktime_get_seconds() >= conn->ksnc_rx_deadline) {
+ /* Timed out incomplete incoming message */
+ ksocknal_conn_addref(conn);
+ CNETERR("Timeout receiving from %s (%pISp), state %d wanted %d left %d\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_peeraddr,
+ conn->ksnc_rx_state,
+ conn->ksnc_rx_nob_wanted,
+ conn->ksnc_rx_nob_left);
+ return conn;
+ }
+
+ 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
+ */
+ 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 (%pISp) the network or that node may be down.\n",
+ libcfs_id2str(peer_ni->ksnp_id),
+ &conn->ksnc_peeraddr);
+ return conn;
+ }
+ }
+
+ return (NULL);
+}
- ksocknal_connect (route);
- ksocknal_route_decref(route);
+static inline void
+ksocknal_flush_stale_txs(struct ksock_peer_ni *peer_ni)
+{
+ struct ksock_tx *tx;
+ LIST_HEAD(stale_txs);
- cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
- ksocknal_data.ksnd_connd_connecting--;
- }
+ write_lock_bh(&ksocknal_data.ksnd_global_lock);
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ while ((tx = list_first_entry_or_null(&peer_ni->ksnp_tx_queue,
+ struct ksock_tx,
+ tx_list)) != NULL) {
+ if (ktime_get_seconds() < tx->tx_deadline)
+ break;
- cfs_wait_event_interruptible_exclusive(
- ksocknal_data.ksnd_connd_waitq,
- ksocknal_connd_ready(), rc);
+ tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_TIMEOUT;
- cfs_spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
- }
+ list_move_tail(&tx->tx_list, &stale_txs);
+ }
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ write_unlock_bh(&ksocknal_data.ksnd_global_lock);
- ksocknal_thread_fini ();
- return (0);
+ ksocknal_txlist_done(peer_ni->ksnp_ni, &stale_txs, -ETIMEDOUT);
}
-ksock_conn_t *
-ksocknal_find_timed_out_conn (ksock_peer_t *peer)
+static int
+ksocknal_send_keepalive_locked(struct ksock_peer_ni *peer_ni)
+__must_hold(&ksocknal_data.ksnd_global_lock)
{
- /* We're called with a shared lock on ksnd_global_lock */
- ksock_conn_t *conn;
- struct list_head *ctmp;
+ struct ksock_sched *sched;
+ struct ksock_conn *conn;
+ struct ksock_tx *tx;
- list_for_each (ctmp, &peer->ksnp_conns) {
- int error;
- conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
+ /* last_alive will be updated by create_conn */
+ if (list_empty(&peer_ni->ksnp_conns))
+ return 0;
- /* Don't need the {get,put}connsock dance to deref ksnc_sock */
- LASSERT (!conn->ksnc_closing);
+ if (peer_ni->ksnp_proto != &ksocknal_protocol_v3x)
+ return 0;
- /* SOCK_ERROR will reset error code of socket in
- * some platform (like Darwin8.x) */
- error = libcfs_sock_error(conn->ksnc_sock);
- if (error != 0) {
- ksocknal_conn_addref(conn);
+ if (*ksocknal_tunables.ksnd_keepalive <= 0 ||
+ ktime_get_seconds() < peer_ni->ksnp_last_alive +
+ *ksocknal_tunables.ksnd_keepalive)
+ return 0;
- switch (error) {
- case ECONNRESET:
- CDEBUG(D_NETERROR, "A connection with %s "
- "(%u.%u.%u.%u:%d) was reset; "
- "it may have rebooted.\n",
- libcfs_id2str(peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- break;
- case ETIMEDOUT:
- CDEBUG(D_NETERROR, "A connection with %s "
- "(%u.%u.%u.%u:%d) timed out; the "
- "network or node may be down.\n",
- libcfs_id2str(peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- break;
- default:
- CDEBUG(D_NETERROR, "An unexpected network error %d "
- "occurred with %s "
- "(%u.%u.%u.%u:%d\n", error,
- libcfs_id2str(peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- break;
- }
+ if (ktime_get_seconds() < peer_ni->ksnp_send_keepalive)
+ return 0;
- return (conn);
- }
+ /* 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;
- if (conn->ksnc_rx_started &&
- cfs_time_aftereq(cfs_time_current(),
- conn->ksnc_rx_deadline)) {
- /* Timed out incomplete incoming message */
- ksocknal_conn_addref(conn);
- CDEBUG(D_NETERROR, "Timeout receiving from %s "
- "(%u.%u.%u.%u:%d), state %d wanted %d left %d\n",
- libcfs_id2str(peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port,
- conn->ksnc_rx_state,
- conn->ksnc_rx_nob_wanted,
- conn->ksnc_rx_nob_left);
- return (conn);
- }
+ conn = ksocknal_find_conn_locked(peer_ni, NULL, 1);
+ if (conn != NULL) {
+ sched = conn->ksnc_scheduler;
- if ((!list_empty(&conn->ksnc_tx_queue) ||
- libcfs_sock_wmem_queued(conn->ksnc_sock) != 0) &&
- cfs_time_aftereq(cfs_time_current(),
- conn->ksnc_tx_deadline)) {
- /* Timed out messages queued for sending or
- * buffered in the socket's send buffer */
- ksocknal_conn_addref(conn);
- CDEBUG(D_NETERROR, "Timeout sending data to %s "
- "(%u.%u.%u.%u:%d) the network or that "
- "node may be down.\n",
- libcfs_id2str(peer->ksnp_id),
- HIPQUAD(conn->ksnc_ipaddr),
- conn->ksnc_port);
- return (conn);
- }
- }
+ 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;
+ }
- return (NULL);
-}
+ spin_unlock_bh(&sched->kss_lock);
+ }
-static inline void
-ksocknal_flush_stale_txs(ksock_peer_t *peer)
-{
- ksock_tx_t *tx;
- CFS_LIST_HEAD (stale_txs);
-
- cfs_write_lock_bh (&ksocknal_data.ksnd_global_lock);
+ read_unlock(&ksocknal_data.ksnd_global_lock);
- while (!list_empty (&peer->ksnp_tx_queue)) {
- tx = list_entry (peer->ksnp_tx_queue.next,
- ksock_tx_t, tx_list);
+ /* 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 (!cfs_time_aftereq(cfs_time_current(),
- tx->tx_deadline))
- break;
-
- list_del (&tx->tx_list);
- list_add_tail (&tx->tx_list, &stale_txs);
- }
+ if (ksocknal_launch_packet(peer_ni->ksnp_ni, tx, peer_ni->ksnp_id) == 0) {
+ read_lock(&ksocknal_data.ksnd_global_lock);
+ return 1;
+ }
- cfs_write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+ ksocknal_free_tx(tx);
+ read_lock(&ksocknal_data.ksnd_global_lock);
- ksocknal_txlist_done(peer->ksnp_ni, &stale_txs, 1);
+ return -EIO;
}
-void
-ksocknal_check_peer_timeouts (int idx)
+
+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... */
- cfs_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) {
- cfs_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, since we dropped
- * ksnd_global_lock and it might be dead already! */
- ksocknal_conn_decref(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
+ */
+ tx = list_first_entry_or_null(&peer_ni->ksnp_tx_queue,
+ struct ksock_tx, tx_list);
+ if (tx && 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;
}
- /* we can't process stale txs right here because we're
- * holding only shared lock */
- if (!list_empty (&peer->ksnp_tx_queue)) {
- ksock_tx_t *tx = list_entry (peer->ksnp_tx_queue.next,
- ksock_tx_t, tx_list);
+ if (tx_stale == NULL) {
+ spin_unlock(&peer_ni->ksnp_lock);
+ continue;
+ }
- if (cfs_time_aftereq(cfs_time_current(),
- tx->tx_deadline)) {
+ deadline = tx_stale->tx_deadline;
+ resid = tx_stale->tx_resid;
+ conn = tx_stale->tx_conn;
+ ksocknal_conn_addref(conn);
- ksocknal_peer_addref(peer);
- cfs_read_unlock (&ksocknal_data.ksnd_global_lock);
-
- ksocknal_flush_stale_txs(peer);
+ spin_unlock(&peer_ni->ksnp_lock);
+ read_unlock(&ksocknal_data.ksnd_global_lock);
- ksocknal_peer_decref(peer);
- goto again;
- }
- }
- }
+ 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);
- /* print out warnings about stale ZC_REQs */
- cfs_list_for_each_entry_typed(peer, peers, ksock_peer_t, ksnp_list) {
- ksock_tx_t *tx;
- int n = 0;
-
- cfs_list_for_each_entry_typed(tx, &peer->ksnp_zc_req_list,
- ksock_tx_t, tx_zc_list) {
- if (!cfs_time_aftereq(cfs_time_current(),
- tx->tx_deadline))
- break;
- n++;
- }
-
- if (n != 0) {
- tx = list_entry (peer->ksnp_zc_req_list.next,
- ksock_tx_t, tx_zc_list);
- CWARN("Stale ZC_REQs for peer %s detected: %d; the "
- "oldest (%p) timed out %ld secs ago\n",
- libcfs_nid2str(peer->ksnp_id.nid), n, tx,
- cfs_duration_sec(cfs_time_current() -
- tx->tx_deadline));
- }
+ ksocknal_close_conn_and_siblings (conn, -ETIMEDOUT);
+ ksocknal_conn_decref(conn);
+ goto again;
}
-
- cfs_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;
- 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();
+ 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_daemonize ("socknal_reaper");
- cfs_block_allsigs ();
+ init_wait(&wait);
- CFS_INIT_LIST_HEAD(&enomem_conns);
- cfs_waitlink_init (&wait);
-
- cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
while (!ksocknal_data.ksnd_shuttingdown) {
+ conn = list_first_entry_or_null(&ksocknal_data.ksnd_deathrow_conns,
+ struct ksock_conn, ksnc_list);
+ if (conn) {
+ 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_bh(&ksocknal_data.ksnd_reaper_lock);
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
+ ksocknal_terminate_conn(conn);
+ ksocknal_conn_decref(conn);
- ksocknal_terminate_conn (conn);
- ksocknal_conn_decref(conn);
-
- cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
+ 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);
+ conn = list_first_entry_or_null(&ksocknal_data.ksnd_zombie_conns,
+ struct ksock_conn, ksnc_list);
+ if (conn) {
+ list_del(&conn->ksnc_list);
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
- ksocknal_destroy_conn (conn);
+ ksocknal_destroy_conn(conn);
- cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
- continue;
- }
+ 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);
- }
+ list_splice_init(&ksocknal_data.ksnd_enomem_conns,
+ &enomem_conns);
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
+ 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 ((conn = list_first_entry_or_null(&enomem_conns,
+ struct ksock_conn,
+ ksnc_tx_list)) != NULL) {
+ list_del(&conn->ksnc_tx_list);
sched = conn->ksnc_scheduler;
- cfs_spin_lock_bh (&sched->kss_lock);
+ 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);
- cfs_spin_unlock_bh (&sched->kss_lock);
+ 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_timeout > n * p)
- chunk = (chunk * n * p) /
- *ksocknal_tunables.ksnd_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 = ksocknal_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;
- cfs_set_current_state (CFS_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, CFS_TASK_INTERRUPTIBLE, 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));
- cfs_set_current_state (CFS_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);
- cfs_spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
- }
+ spin_lock_bh(&ksocknal_data.ksnd_reaper_lock);
+ }
- cfs_spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
+ spin_unlock_bh(&ksocknal_data.ksnd_reaper_lock);
- ksocknal_thread_fini ();
- return (0);
+ ksocknal_thread_fini();
+ return 0;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff