+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, 2014, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lnet/klnds/ralnd/ralnd.c
- *
- * Author: Eric Barton <eric@bartonsoftware.com>
- */
-#include "ralnd.h"
-
-static int kranal_devids[RANAL_MAXDEVS] = {RAPK_MAIN_DEVICE_ID,
- RAPK_EXPANSION_DEVICE_ID};
-
-lnd_t the_kralnd = {
- .lnd_type = RALND,
- .lnd_startup = kranal_startup,
- .lnd_shutdown = kranal_shutdown,
- .lnd_ctl = kranal_ctl,
- .lnd_send = kranal_send,
- .lnd_recv = kranal_recv,
- .lnd_eager_recv = kranal_eager_recv,
- .lnd_accept = kranal_accept,
-};
-
-kra_data_t kranal_data;
-
-void
-kranal_pack_connreq(kra_connreq_t *connreq, kra_conn_t *conn, lnet_nid_t dstnid)
-{
- RAP_RETURN rrc;
-
- memset(connreq, 0, sizeof(*connreq));
-
- connreq->racr_magic = RANAL_MSG_MAGIC;
- connreq->racr_version = RANAL_MSG_VERSION;
-
- if (conn == NULL) /* prepping a "stub" reply */
- return;
-
- connreq->racr_devid = conn->rac_device->rad_id;
- connreq->racr_srcnid = kranal_data.kra_ni->ni_nid;
- connreq->racr_dstnid = dstnid;
- connreq->racr_peerstamp = kranal_data.kra_peerstamp;
- connreq->racr_connstamp = conn->rac_my_connstamp;
- connreq->racr_timeout = conn->rac_timeout;
-
- rrc = RapkGetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
- LASSERT(rrc == RAP_SUCCESS);
-}
-
-int
-kranal_recv_connreq(struct socket *sock, kra_connreq_t *connreq, int active)
-{
- int timeout = active ? *kranal_tunables.kra_timeout :
- lnet_acceptor_timeout();
- int swab;
- int rc;
-
- /* return 0 on success, -ve on error, +ve to tell the peer I'm "old" */
-
- rc = libcfs_sock_read(sock, &connreq->racr_magic,
- sizeof(connreq->racr_magic), timeout);
- if (rc != 0) {
- CERROR("Read(magic) failed(1): %d\n", rc);
- return -EIO;
- }
-
- if (connreq->racr_magic != RANAL_MSG_MAGIC &&
- connreq->racr_magic != __swab32(RANAL_MSG_MAGIC)) {
- /* Unexpected magic! */
- if (!active &&
- (connreq->racr_magic == LNET_PROTO_MAGIC ||
- connreq->racr_magic == __swab32(LNET_PROTO_MAGIC))) {
- /* future protocol version compatibility!
- * When LNET unifies protocols over all LNDs, the first
- * thing sent will be a version query. +ve rc means I
- * reply with my current magic/version */
- return EPROTO;
- }
-
- CERROR("Unexpected magic %08x (%s)\n",
- connreq->racr_magic, active ? "active" : "passive");
- return -EPROTO;
- }
-
- swab = (connreq->racr_magic == __swab32(RANAL_MSG_MAGIC));
-
- rc = libcfs_sock_read(sock, &connreq->racr_version,
- sizeof(connreq->racr_version), timeout);
- if (rc != 0) {
- CERROR("Read(version) failed: %d\n", rc);
- return -EIO;
- }
-
- if (swab)
- __swab16s(&connreq->racr_version);
-
- if (connreq->racr_version != RANAL_MSG_VERSION) {
- if (active) {
- CERROR("Unexpected version %d\n", connreq->racr_version);
- return -EPROTO;
- }
- /* If this is a future version of the ralnd protocol, and I'm
- * passive (accepted the connection), tell my peer I'm "old"
- * (+ve rc) */
- return EPROTO;
- }
-
- rc = libcfs_sock_read(sock, &connreq->racr_devid,
- sizeof(connreq->racr_version) -
- offsetof(kra_connreq_t, racr_devid),
- timeout);
- if (rc != 0) {
- CERROR("Read(body) failed: %d\n", rc);
- return -EIO;
- }
-
- if (swab) {
- __swab32s(&connreq->racr_magic);
- __swab16s(&connreq->racr_version);
- __swab16s(&connreq->racr_devid);
- __swab64s(&connreq->racr_srcnid);
- __swab64s(&connreq->racr_dstnid);
- __swab64s(&connreq->racr_peerstamp);
- __swab64s(&connreq->racr_connstamp);
- __swab32s(&connreq->racr_timeout);
-
- __swab32s(&connreq->racr_riparams.HostId);
- __swab32s(&connreq->racr_riparams.FmaDomainHndl);
- __swab32s(&connreq->racr_riparams.PTag);
- __swab32s(&connreq->racr_riparams.CompletionCookie);
- }
-
- if (connreq->racr_srcnid == LNET_NID_ANY ||
- connreq->racr_dstnid == LNET_NID_ANY) {
- CERROR("Received LNET_NID_ANY\n");
- return -EPROTO;
- }
-
- if (connreq->racr_timeout < RANAL_MIN_TIMEOUT) {
- CERROR("Received timeout %d < MIN %d\n",
- connreq->racr_timeout, RANAL_MIN_TIMEOUT);
- return -EPROTO;
- }
-
- return 0;
-}
-
-int
-kranal_close_stale_conns_locked (kra_peer_t *peer, kra_conn_t *newconn)
-{
- kra_conn_t *conn;
- cfs_list_t *ctmp;
- cfs_list_t *cnxt;
- int loopback;
- int count = 0;
-
- loopback = peer->rap_nid == kranal_data.kra_ni->ni_nid;
-
- cfs_list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
- conn = cfs_list_entry(ctmp, kra_conn_t, rac_list);
-
- if (conn == newconn)
- continue;
-
- if (conn->rac_peerstamp != newconn->rac_peerstamp) {
- CDEBUG(D_NET, "Closing stale conn nid: %s "
- " peerstamp:"LPX64"("LPX64")\n",
- libcfs_nid2str(peer->rap_nid),
- conn->rac_peerstamp, newconn->rac_peerstamp);
- LASSERT (conn->rac_peerstamp < newconn->rac_peerstamp);
- count++;
- kranal_close_conn_locked(conn, -ESTALE);
- continue;
- }
-
- if (conn->rac_device != newconn->rac_device)
- continue;
-
- if (loopback &&
- newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
- newconn->rac_peer_connstamp == conn->rac_my_connstamp)
- continue;
-
- LASSERT (conn->rac_peer_connstamp < newconn->rac_peer_connstamp);
-
- CDEBUG(D_NET, "Closing stale conn nid: %s"
- " connstamp:"LPX64"("LPX64")\n",
- libcfs_nid2str(peer->rap_nid),
- conn->rac_peer_connstamp, newconn->rac_peer_connstamp);
-
- count++;
- kranal_close_conn_locked(conn, -ESTALE);
- }
-
- return count;
-}
-
-int
-kranal_conn_isdup_locked(kra_peer_t *peer, kra_conn_t *newconn)
-{
- kra_conn_t *conn;
- cfs_list_t *tmp;
- int loopback;
-
- loopback = peer->rap_nid == kranal_data.kra_ni->ni_nid;
-
- cfs_list_for_each(tmp, &peer->rap_conns) {
- conn = cfs_list_entry(tmp, kra_conn_t, rac_list);
-
- /* 'newconn' is from an earlier version of 'peer'!!! */
- if (newconn->rac_peerstamp < conn->rac_peerstamp)
- return 1;
-
- /* 'conn' is from an earlier version of 'peer': it will be
- * removed when we cull stale conns later on... */
- if (newconn->rac_peerstamp > conn->rac_peerstamp)
- continue;
-
- /* Different devices are OK */
- if (conn->rac_device != newconn->rac_device)
- continue;
-
- /* It's me connecting to myself */
- if (loopback &&
- newconn->rac_my_connstamp == conn->rac_peer_connstamp &&
- newconn->rac_peer_connstamp == conn->rac_my_connstamp)
- continue;
-
- /* 'newconn' is an earlier connection from 'peer'!!! */
- if (newconn->rac_peer_connstamp < conn->rac_peer_connstamp)
- return 2;
-
- /* 'conn' is an earlier connection from 'peer': it will be
- * removed when we cull stale conns later on... */
- if (newconn->rac_peer_connstamp > conn->rac_peer_connstamp)
- continue;
-
- /* 'newconn' has the SAME connection stamp; 'peer' isn't
- * playing the game... */
- return 3;
- }
-
- return 0;
-}
-
-void
-kranal_set_conn_uniqueness (kra_conn_t *conn)
-{
- unsigned long flags;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- conn->rac_my_connstamp = kranal_data.kra_connstamp++;
-
- do { /* allocate a unique cqid */
- conn->rac_cqid = kranal_data.kra_next_cqid++;
- } while (kranal_cqid2conn_locked(conn->rac_cqid) != NULL);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-}
-
-int
-kranal_create_conn(kra_conn_t **connp, kra_device_t *dev)
-{
- kra_conn_t *conn;
- RAP_RETURN rrc;
-
- LASSERT (!in_interrupt());
- LIBCFS_ALLOC(conn, sizeof(*conn));
-
- if (conn == NULL)
- return -ENOMEM;
-
- memset(conn, 0, sizeof(*conn));
- atomic_set(&conn->rac_refcount, 1);
- CFS_INIT_LIST_HEAD(&conn->rac_list);
- CFS_INIT_LIST_HEAD(&conn->rac_hashlist);
- CFS_INIT_LIST_HEAD(&conn->rac_schedlist);
- CFS_INIT_LIST_HEAD(&conn->rac_fmaq);
- CFS_INIT_LIST_HEAD(&conn->rac_rdmaq);
- CFS_INIT_LIST_HEAD(&conn->rac_replyq);
- spin_lock_init(&conn->rac_lock);
-
- kranal_set_conn_uniqueness(conn);
-
- conn->rac_device = dev;
- conn->rac_timeout = MAX(*kranal_tunables.kra_timeout, RANAL_MIN_TIMEOUT);
- kranal_update_reaper_timeout(conn->rac_timeout);
-
- rrc = RapkCreateRi(dev->rad_handle, conn->rac_cqid,
- &conn->rac_rihandle);
- if (rrc != RAP_SUCCESS) {
- CERROR("RapkCreateRi failed: %d\n", rrc);
- LIBCFS_FREE(conn, sizeof(*conn));
- return -ENETDOWN;
- }
-
- atomic_inc(&kranal_data.kra_nconns);
- *connp = conn;
- return 0;
-}
-
-void
-kranal_destroy_conn(kra_conn_t *conn)
-{
- RAP_RETURN rrc;
-
- LASSERT (!in_interrupt());
- LASSERT (!conn->rac_scheduled);
- LASSERT (cfs_list_empty(&conn->rac_list));
- LASSERT (cfs_list_empty(&conn->rac_hashlist));
- LASSERT (cfs_list_empty(&conn->rac_schedlist));
- LASSERT (atomic_read(&conn->rac_refcount) == 0);
- LASSERT (cfs_list_empty(&conn->rac_fmaq));
- LASSERT (cfs_list_empty(&conn->rac_rdmaq));
- LASSERT (cfs_list_empty(&conn->rac_replyq));
-
- rrc = RapkDestroyRi(conn->rac_device->rad_handle,
- conn->rac_rihandle);
- LASSERT (rrc == RAP_SUCCESS);
-
- if (conn->rac_peer != NULL)
- kranal_peer_decref(conn->rac_peer);
-
- LIBCFS_FREE(conn, sizeof(*conn));
- atomic_dec(&kranal_data.kra_nconns);
-}
-
-void
-kranal_terminate_conn_locked (kra_conn_t *conn)
-{
- LASSERT (!in_interrupt());
- LASSERT (conn->rac_state == RANAL_CONN_CLOSING);
- LASSERT (!cfs_list_empty(&conn->rac_hashlist));
- LASSERT (cfs_list_empty(&conn->rac_list));
-
- /* Remove from conn hash table: no new callbacks */
- cfs_list_del_init(&conn->rac_hashlist);
- kranal_conn_decref(conn);
-
- conn->rac_state = RANAL_CONN_CLOSED;
-
- /* schedule to clear out all uncompleted comms in context of dev's
- * scheduler */
- kranal_schedule_conn(conn);
-}
-
-void
-kranal_close_conn_locked (kra_conn_t *conn, int error)
-{
- kra_peer_t *peer = conn->rac_peer;
-
- CDEBUG_LIMIT(error == 0 ? D_NET : D_NETERROR,
- "closing conn to %s: error %d\n",
- libcfs_nid2str(peer->rap_nid), error);
-
- LASSERT (!in_interrupt());
- LASSERT (conn->rac_state == RANAL_CONN_ESTABLISHED);
- LASSERT (!cfs_list_empty(&conn->rac_hashlist));
- LASSERT (!cfs_list_empty(&conn->rac_list));
-
- cfs_list_del_init(&conn->rac_list);
-
- if (cfs_list_empty(&peer->rap_conns) &&
- peer->rap_persistence == 0) {
- /* Non-persistent peer with no more conns... */
- kranal_unlink_peer_locked(peer);
- }
-
- /* Reset RX timeout to ensure we wait for an incoming CLOSE for the
- * full timeout. If we get a CLOSE we know the peer has stopped all
- * RDMA. Otherwise if we wait for the full timeout we can also be sure
- * all RDMA has stopped. */
- conn->rac_last_rx = jiffies;
- smp_mb();
-
- conn->rac_state = RANAL_CONN_CLOSING;
- kranal_schedule_conn(conn); /* schedule sending CLOSE */
-
- kranal_conn_decref(conn); /* lose peer's ref */
-}
-
-void
-kranal_close_conn (kra_conn_t *conn, int error)
-{
- unsigned long flags;
-
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (conn->rac_state == RANAL_CONN_ESTABLISHED)
- kranal_close_conn_locked(conn, error);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-}
-
-int
-kranal_set_conn_params(kra_conn_t *conn, kra_connreq_t *connreq,
- __u32 peer_ip, int peer_port)
-{
- kra_device_t *dev = conn->rac_device;
- unsigned long flags;
- RAP_RETURN rrc;
-
- /* CAVEAT EMPTOR: we're really overloading rac_last_tx + rac_keepalive
- * to do RapkCompleteSync() timekeeping (see kibnal_scheduler). */
- conn->rac_last_tx = jiffies;
- conn->rac_keepalive = 0;
-
- rrc = RapkSetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
- if (rrc != RAP_SUCCESS) {
- CERROR("Error setting riparams from %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rrc);
- return -ECONNABORTED;
- }
-
- /* Schedule conn on rad_new_conns */
- kranal_conn_addref(conn);
- spin_lock_irqsave(&dev->rad_lock, flags);
- cfs_list_add_tail(&conn->rac_schedlist, &dev->rad_new_conns);
- wake_up(&dev->rad_waitq);
- spin_unlock_irqrestore(&dev->rad_lock, flags);
-
- rrc = RapkWaitToConnect(conn->rac_rihandle);
- if (rrc != RAP_SUCCESS) {
- CERROR("Error waiting to connect to %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rrc);
- return -ECONNABORTED;
- }
-
- /* Scheduler doesn't touch conn apart from to deschedule and decref it
- * after RapkCompleteSync() return success, so conn is all mine */
-
- conn->rac_peerstamp = connreq->racr_peerstamp;
- conn->rac_peer_connstamp = connreq->racr_connstamp;
- conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq->racr_timeout);
- kranal_update_reaper_timeout(conn->rac_keepalive);
- return 0;
-}
-
-int
-kranal_passive_conn_handshake (struct socket *sock, lnet_nid_t *src_nidp,
- lnet_nid_t *dst_nidp, kra_conn_t **connp)
-{
- __u32 peer_ip;
- unsigned int peer_port;
- kra_connreq_t rx_connreq;
- kra_connreq_t tx_connreq;
- kra_conn_t *conn;
- kra_device_t *dev;
- int rc;
- int i;
-
- rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
- if (rc != 0) {
- CERROR("Can't get peer's IP: %d\n", rc);
- return rc;
- }
-
- rc = kranal_recv_connreq(sock, &rx_connreq, 0);
-
- if (rc < 0) {
- CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rc);
- return rc;
- }
-
- if (rc > 0) {
- /* Request from "new" peer: send reply with my MAGIC/VERSION to
- * tell her I'm old... */
- kranal_pack_connreq(&tx_connreq, NULL, LNET_NID_ANY);
-
- rc = libcfs_sock_write(sock, &tx_connreq, sizeof(tx_connreq),
- lnet_acceptor_timeout());
- if (rc != 0)
- CERROR("Can't tx stub connreq to %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rc);
-
- return -EPROTO;
- }
-
- for (i = 0;;i++) {
- if (i == kranal_data.kra_ndevs) {
- CERROR("Can't match dev %d from %u.%u.%u.%u/%d\n",
- rx_connreq.racr_devid, HIPQUAD(peer_ip), peer_port);
- return -ENODEV;
- }
- dev = &kranal_data.kra_devices[i];
- if (dev->rad_id == rx_connreq.racr_devid)
- break;
- }
-
- rc = kranal_create_conn(&conn, dev);
- if (rc != 0)
- return rc;
-
- kranal_pack_connreq(&tx_connreq, conn, rx_connreq.racr_srcnid);
-
- rc = libcfs_sock_write(sock, &tx_connreq, sizeof(tx_connreq),
- lnet_acceptor_timeout());
- if (rc != 0) {
- CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rc);
- kranal_conn_decref(conn);
- return rc;
- }
-
- rc = kranal_set_conn_params(conn, &rx_connreq, peer_ip, peer_port);
- if (rc != 0) {
- kranal_conn_decref(conn);
- return rc;
- }
-
- *connp = conn;
- *src_nidp = rx_connreq.racr_srcnid;
- *dst_nidp = rx_connreq.racr_dstnid;
- return 0;
-}
-
-int
-kranal_active_conn_handshake(kra_peer_t *peer,
- lnet_nid_t *dst_nidp, kra_conn_t **connp)
-{
- kra_connreq_t connreq;
- kra_conn_t *conn;
- kra_device_t *dev;
- struct socket *sock;
- int rc;
- unsigned int idx;
-
- /* spread connections over all devices using both peer NIDs to ensure
- * all nids use all devices */
- idx = peer->rap_nid + kranal_data.kra_ni->ni_nid;
- dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
-
- rc = kranal_create_conn(&conn, dev);
- if (rc != 0)
- return rc;
-
- kranal_pack_connreq(&connreq, conn, peer->rap_nid);
-
- if (the_lnet.ln_testprotocompat != 0) {
- /* single-shot proto test */
- LNET_LOCK();
- if ((the_lnet.ln_testprotocompat & 1) != 0) {
- connreq.racr_version++;
- the_lnet.ln_testprotocompat &= ~1;
- }
- if ((the_lnet.ln_testprotocompat & 2) != 0) {
- connreq.racr_magic = LNET_PROTO_MAGIC;
- the_lnet.ln_testprotocompat &= ~2;
- }
- LNET_UNLOCK();
- }
-
- rc = lnet_connect(&sock, peer->rap_nid,
- 0, peer->rap_ip, peer->rap_port);
- if (rc != 0)
- goto failed_0;
-
- /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
- * immediately after accepting a connection, so we connect and then
- * send immediately. */
-
- rc = libcfs_sock_write(sock, &connreq, sizeof(connreq),
- lnet_acceptor_timeout());
- if (rc != 0) {
- CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer->rap_ip), peer->rap_port, rc);
- goto failed_2;
- }
-
- rc = kranal_recv_connreq(sock, &connreq, 1);
- if (rc != 0) {
- CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer->rap_ip), peer->rap_port, rc);
- goto failed_2;
- }
-
- libcfs_sock_release(sock);
- rc = -EPROTO;
-
- if (connreq.racr_srcnid != peer->rap_nid) {
- CERROR("Unexpected srcnid from %u.%u.%u.%u/%d: "
- "received %s expected %s\n",
- HIPQUAD(peer->rap_ip), peer->rap_port,
- libcfs_nid2str(connreq.racr_srcnid),
- libcfs_nid2str(peer->rap_nid));
- goto failed_1;
- }
-
- if (connreq.racr_devid != dev->rad_id) {
- CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
- "received %d expected %d\n",
- HIPQUAD(peer->rap_ip), peer->rap_port,
- connreq.racr_devid, dev->rad_id);
- goto failed_1;
- }
-
- rc = kranal_set_conn_params(conn, &connreq,
- peer->rap_ip, peer->rap_port);
- if (rc != 0)
- goto failed_1;
-
- *connp = conn;
- *dst_nidp = connreq.racr_dstnid;
- return 0;
-
- failed_2:
- libcfs_sock_release(sock);
- failed_1:
- lnet_connect_console_error(rc, peer->rap_nid,
- peer->rap_ip, peer->rap_port);
- failed_0:
- kranal_conn_decref(conn);
- return rc;
-}
-
-int
-kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
-{
- kra_peer_t *peer2;
- kra_tx_t *tx;
- lnet_nid_t peer_nid;
- lnet_nid_t dst_nid;
- unsigned long flags;
- kra_conn_t *conn;
- int rc;
- int nstale;
- int new_peer = 0;
-
- if (sock == NULL) {
- /* active: connd wants to connect to 'peer' */
- LASSERT (peer != NULL);
- LASSERT (peer->rap_connecting);
-
- rc = kranal_active_conn_handshake(peer, &dst_nid, &conn);
- if (rc != 0)
- return rc;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (!kranal_peer_active(peer)) {
- /* raced with peer getting unlinked */
- write_unlock_irqrestore(&kranal_data. \
- kra_global_lock,
- flags);
- kranal_conn_decref(conn);
- return -ESTALE;
- }
-
- peer_nid = peer->rap_nid;
- } else {
- /* passive: listener accepted 'sock' */
- LASSERT (peer == NULL);
-
- rc = kranal_passive_conn_handshake(sock, &peer_nid,
- &dst_nid, &conn);
- if (rc != 0)
- return rc;
-
- /* assume this is a new peer */
- rc = kranal_create_peer(&peer, peer_nid);
- if (rc != 0) {
- CERROR("Can't create conn for %s\n",
- libcfs_nid2str(peer_nid));
- kranal_conn_decref(conn);
- return -ENOMEM;
- }
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- peer2 = kranal_find_peer_locked(peer_nid);
- if (peer2 == NULL) {
- new_peer = 1;
- } else {
- /* peer_nid already in the peer table */
- kranal_peer_decref(peer);
- peer = peer2;
- }
- }
-
- LASSERT ((!new_peer) != (!kranal_peer_active(peer)));
-
- /* Refuse connection if peer thinks we are a different NID. We check
- * this while holding the global lock, to synch with connection
- * destruction on NID change. */
- if (kranal_data.kra_ni->ni_nid != dst_nid) {
- write_unlock_irqrestore(&kranal_data.kra_global_lock,
- flags);
-
- CERROR("Stale/bad connection with %s: dst_nid %s, expected %s\n",
- libcfs_nid2str(peer_nid), libcfs_nid2str(dst_nid),
- libcfs_nid2str(kranal_data.kra_ni->ni_nid));
- rc = -ESTALE;
- goto failed;
- }
-
- /* Refuse to duplicate an existing connection (both sides might try to
- * connect at once). NB we return success! We _are_ connected so we
- * _don't_ have any blocked txs to complete with failure. */
- rc = kranal_conn_isdup_locked(peer, conn);
- if (rc != 0) {
- LASSERT (!cfs_list_empty(&peer->rap_conns));
- LASSERT (cfs_list_empty(&peer->rap_tx_queue));
- write_unlock_irqrestore(&kranal_data.kra_global_lock,
- flags);
- CWARN("Not creating duplicate connection to %s: %d\n",
- libcfs_nid2str(peer_nid), rc);
- rc = 0;
- goto failed;
- }
-
- if (new_peer) {
- /* peer table takes my ref on the new peer */
- cfs_list_add_tail(&peer->rap_list,
- kranal_nid2peerlist(peer_nid));
- }
-
- /* initialise timestamps before reaper looks at them */
- conn->rac_last_tx = conn->rac_last_rx = jiffies;
-
- kranal_peer_addref(peer); /* +1 ref for conn */
- conn->rac_peer = peer;
- cfs_list_add_tail(&conn->rac_list, &peer->rap_conns);
-
- kranal_conn_addref(conn); /* +1 ref for conn table */
- cfs_list_add_tail(&conn->rac_hashlist,
- kranal_cqid2connlist(conn->rac_cqid));
-
- /* Schedule all packets blocking for a connection */
- while (!cfs_list_empty(&peer->rap_tx_queue)) {
- tx = cfs_list_entry(peer->rap_tx_queue.next,
- kra_tx_t, tx_list);
-
- cfs_list_del(&tx->tx_list);
- kranal_post_fma(conn, tx);
- }
-
- nstale = kranal_close_stale_conns_locked(peer, conn);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- /* CAVEAT EMPTOR: passive peer can disappear NOW */
-
- if (nstale != 0)
- CWARN("Closed %d stale conns to %s\n", nstale,
- libcfs_nid2str(peer_nid));
-
- CWARN("New connection to %s on devid[%d] = %d\n",
- libcfs_nid2str(peer_nid),
- conn->rac_device->rad_idx, conn->rac_device->rad_id);
-
- /* Ensure conn gets checked. Transmits may have been queued and an
- * FMA event may have happened before it got in the cq hash table */
- kranal_schedule_conn(conn);
- return 0;
-
- failed:
- if (new_peer)
- kranal_peer_decref(peer);
- kranal_conn_decref(conn);
- return rc;
-}
-
-void
-kranal_connect (kra_peer_t *peer)
-{
- kra_tx_t *tx;
- unsigned long flags;
- cfs_list_t zombies;
- int rc;
-
- LASSERT (peer->rap_connecting);
-
- CDEBUG(D_NET, "About to handshake %s\n",
- libcfs_nid2str(peer->rap_nid));
-
- rc = kranal_conn_handshake(NULL, peer);
-
- CDEBUG(D_NET, "Done handshake %s:%d \n",
- libcfs_nid2str(peer->rap_nid), rc);
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- LASSERT (peer->rap_connecting);
- peer->rap_connecting = 0;
-
- if (rc == 0) {
- /* kranal_conn_handshake() queues blocked txs immediately on
- * success to avoid messages jumping the queue */
- LASSERT (cfs_list_empty(&peer->rap_tx_queue));
-
- peer->rap_reconnect_interval = 0; /* OK to reconnect at any time */
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock,
- flags);
- return;
- }
-
- peer->rap_reconnect_interval *= 2;
- peer->rap_reconnect_interval =
- MAX(peer->rap_reconnect_interval,
- *kranal_tunables.kra_min_reconnect_interval);
- peer->rap_reconnect_interval =
- MIN(peer->rap_reconnect_interval,
- *kranal_tunables.kra_max_reconnect_interval);
-
- peer->rap_reconnect_time = jiffies +
- msecs_to_jiffies(peer->rap_reconnect_interval * MSEC_PER_SEC);
-
- /* Grab all blocked packets while we have the global lock */
- cfs_list_add(&zombies, &peer->rap_tx_queue);
- cfs_list_del_init(&peer->rap_tx_queue);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- if (cfs_list_empty(&zombies))
- return;
-
- CNETERR("Dropping packets for %s: connection failed\n",
- libcfs_nid2str(peer->rap_nid));
-
- do {
- tx = cfs_list_entry(zombies.next, kra_tx_t, tx_list);
-
- cfs_list_del(&tx->tx_list);
- kranal_tx_done(tx, -EHOSTUNREACH);
-
- } while (!cfs_list_empty(&zombies));
-}
-
-void
-kranal_free_acceptsock (kra_acceptsock_t *ras)
-{
- libcfs_sock_release(ras->ras_sock);
- LIBCFS_FREE(ras, sizeof(*ras));
-}
-
-int
-kranal_accept (lnet_ni_t *ni, struct socket *sock)
-{
- kra_acceptsock_t *ras;
- int rc;
- __u32 peer_ip;
- int peer_port;
- unsigned long flags;
-
- rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
- LASSERT (rc == 0); /* we succeeded before */
-
- LIBCFS_ALLOC(ras, sizeof(*ras));
- if (ras == NULL) {
- CERROR("ENOMEM allocating connection request from "
- "%u.%u.%u.%u\n", HIPQUAD(peer_ip));
- return -ENOMEM;
- }
-
- ras->ras_sock = sock;
-
- spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
-
- cfs_list_add_tail(&ras->ras_list, &kranal_data.kra_connd_acceptq);
- wake_up(&kranal_data.kra_connd_waitq);
-
- spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
- return 0;
-}
-
-int
-kranal_create_peer (kra_peer_t **peerp, lnet_nid_t nid)
-{
- kra_peer_t *peer;
- unsigned long flags;
-
- LASSERT (nid != LNET_NID_ANY);
-
- LIBCFS_ALLOC(peer, sizeof(*peer));
- if (peer == NULL)
- return -ENOMEM;
-
- memset(peer, 0, sizeof(*peer)); /* zero flags etc */
-
- peer->rap_nid = nid;
- atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
-
- CFS_INIT_LIST_HEAD(&peer->rap_list);
- CFS_INIT_LIST_HEAD(&peer->rap_connd_list);
- CFS_INIT_LIST_HEAD(&peer->rap_conns);
- CFS_INIT_LIST_HEAD(&peer->rap_tx_queue);
-
- peer->rap_reconnect_interval = 0; /* OK to connect at any time */
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (kranal_data.kra_nonewpeers) {
- /* shutdown has started already */
- write_unlock_irqrestore(&kranal_data.kra_global_lock,
- flags);
-
- LIBCFS_FREE(peer, sizeof(*peer));
- CERROR("Can't create peer: network shutdown\n");
- return -ESHUTDOWN;
- }
-
- atomic_inc(&kranal_data.kra_npeers);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- *peerp = peer;
- return 0;
-}
-
-void
-kranal_destroy_peer (kra_peer_t *peer)
-{
- CDEBUG(D_NET, "peer %s %p deleted\n",
- libcfs_nid2str(peer->rap_nid), peer);
-
- LASSERT (atomic_read(&peer->rap_refcount) == 0);
- LASSERT (peer->rap_persistence == 0);
- LASSERT (!kranal_peer_active(peer));
- LASSERT (!peer->rap_connecting);
- LASSERT (cfs_list_empty(&peer->rap_conns));
- LASSERT (cfs_list_empty(&peer->rap_tx_queue));
- LASSERT (cfs_list_empty(&peer->rap_connd_list));
-
- LIBCFS_FREE(peer, sizeof(*peer));
-
- /* NB a peer's connections keep a reference on their peer until
- * they are destroyed, so we can be assured that _all_ state to do
- * with this peer has been cleaned up when its refcount drops to
- * zero. */
- atomic_dec(&kranal_data.kra_npeers);
-}
-
-kra_peer_t *
-kranal_find_peer_locked (lnet_nid_t nid)
-{
- cfs_list_t *peer_list = kranal_nid2peerlist(nid);
- cfs_list_t *tmp;
- kra_peer_t *peer;
-
- cfs_list_for_each (tmp, peer_list) {
-
- peer = cfs_list_entry(tmp, kra_peer_t, rap_list);
-
- LASSERT (peer->rap_persistence > 0 || /* persistent peer */
- !cfs_list_empty(&peer->rap_conns)); /* active conn */
-
- if (peer->rap_nid != nid)
- continue;
-
- CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n",
- peer, libcfs_nid2str(nid),
- atomic_read(&peer->rap_refcount));
- return peer;
- }
- return NULL;
-}
-
-kra_peer_t *
-kranal_find_peer (lnet_nid_t nid)
-{
- kra_peer_t *peer;
-
- read_lock(&kranal_data.kra_global_lock);
- peer = kranal_find_peer_locked(nid);
- if (peer != NULL) /* +1 ref for caller? */
- kranal_peer_addref(peer);
- read_unlock(&kranal_data.kra_global_lock);
-
- return peer;
-}
-
-void
-kranal_unlink_peer_locked (kra_peer_t *peer)
-{
- LASSERT (peer->rap_persistence == 0);
- LASSERT (cfs_list_empty(&peer->rap_conns));
-
- LASSERT (kranal_peer_active(peer));
- cfs_list_del_init(&peer->rap_list);
-
- /* lose peerlist's ref */
- kranal_peer_decref(peer);
-}
-
-int
-kranal_get_peer_info (int index, lnet_nid_t *nidp, __u32 *ipp, int *portp,
- int *persistencep)
-{
- kra_peer_t *peer;
- cfs_list_t *ptmp;
- int i;
-
- read_lock(&kranal_data.kra_global_lock);
-
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
-
- cfs_list_for_each(ptmp, &kranal_data.kra_peers[i]) {
-
- peer = cfs_list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !cfs_list_empty(&peer->rap_conns));
-
- if (index-- > 0)
- continue;
-
- *nidp = peer->rap_nid;
- *ipp = peer->rap_ip;
- *portp = peer->rap_port;
- *persistencep = peer->rap_persistence;
-
- read_unlock(&kranal_data.kra_global_lock);
- return 0;
- }
- }
-
- read_unlock(&kranal_data.kra_global_lock);
- return -ENOENT;
-}
-
-int
-kranal_add_persistent_peer (lnet_nid_t nid, __u32 ip, int port)
-{
- unsigned long flags;
- kra_peer_t *peer;
- kra_peer_t *peer2;
- int rc;
-
- if (nid == LNET_NID_ANY)
- return -EINVAL;
-
- rc = kranal_create_peer(&peer, nid);
- if (rc != 0)
- return rc;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- peer2 = kranal_find_peer_locked(nid);
- if (peer2 != NULL) {
- kranal_peer_decref(peer);
- peer = peer2;
- } else {
- /* peer table takes existing ref on peer */
- cfs_list_add_tail(&peer->rap_list,
- kranal_nid2peerlist(nid));
- }
-
- peer->rap_ip = ip;
- peer->rap_port = port;
- peer->rap_persistence++;
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
- return 0;
-}
-
-void
-kranal_del_peer_locked (kra_peer_t *peer)
-{
- cfs_list_t *ctmp;
- cfs_list_t *cnxt;
- kra_conn_t *conn;
-
- peer->rap_persistence = 0;
-
- if (cfs_list_empty(&peer->rap_conns)) {
- kranal_unlink_peer_locked(peer);
- } else {
- cfs_list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
- conn = cfs_list_entry(ctmp, kra_conn_t, rac_list);
-
- kranal_close_conn_locked(conn, 0);
- }
- /* peer unlinks itself when last conn is closed */
- }
-}
-
-int
-kranal_del_peer (lnet_nid_t nid)
-{
- unsigned long flags;
- cfs_list_t *ptmp;
- cfs_list_t *pnxt;
- kra_peer_t *peer;
- int lo;
- int hi;
- int i;
- int rc = -ENOENT;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (nid != LNET_NID_ANY)
- lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
- else {
- lo = 0;
- hi = kranal_data.kra_peer_hash_size - 1;
- }
-
- for (i = lo; i <= hi; i++) {
- cfs_list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
- peer = cfs_list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !cfs_list_empty(&peer->rap_conns));
-
- if (!(nid == LNET_NID_ANY || peer->rap_nid == nid))
- continue;
-
- kranal_del_peer_locked(peer);
- rc = 0; /* matched something */
- }
- }
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- return rc;
-}
-
-kra_conn_t *
-kranal_get_conn_by_idx (int index)
-{
- kra_peer_t *peer;
- cfs_list_t *ptmp;
- kra_conn_t *conn;
- cfs_list_t *ctmp;
- int i;
-
- read_lock(&kranal_data.kra_global_lock);
-
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
- cfs_list_for_each (ptmp, &kranal_data.kra_peers[i]) {
-
- peer = cfs_list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !cfs_list_empty(&peer->rap_conns));
-
- cfs_list_for_each (ctmp, &peer->rap_conns) {
- if (index-- > 0)
- continue;
-
- conn = cfs_list_entry(ctmp, kra_conn_t,
- rac_list);
- CDEBUG(D_NET, "++conn[%p] -> %s (%d)\n", conn,
- libcfs_nid2str(conn->rac_peer->rap_nid),
- atomic_read(&conn->rac_refcount));
- atomic_inc(&conn->rac_refcount);
- read_unlock(&kranal_data.kra_global_lock);
- return conn;
- }
- }
- }
-
- read_unlock(&kranal_data.kra_global_lock);
- return NULL;
-}
-
-int
-kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
-{
- kra_conn_t *conn;
- cfs_list_t *ctmp;
- cfs_list_t *cnxt;
- int count = 0;
-
- cfs_list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
- conn = cfs_list_entry(ctmp, kra_conn_t, rac_list);
-
- count++;
- kranal_close_conn_locked(conn, why);
- }
-
- return count;
-}
-
-int
-kranal_close_matching_conns (lnet_nid_t nid)
-{
- unsigned long flags;
- kra_peer_t *peer;
- cfs_list_t *ptmp;
- cfs_list_t *pnxt;
- int lo;
- int hi;
- int i;
- int count = 0;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (nid != LNET_NID_ANY)
- lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
- else {
- lo = 0;
- hi = kranal_data.kra_peer_hash_size - 1;
- }
-
- for (i = lo; i <= hi; i++) {
- cfs_list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
-
- peer = cfs_list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !cfs_list_empty(&peer->rap_conns));
-
- if (!(nid == LNET_NID_ANY || nid == peer->rap_nid))
- continue;
-
- count += kranal_close_peer_conns_locked(peer, 0);
- }
- }
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- /* wildcards always succeed */
- if (nid == LNET_NID_ANY)
- return 0;
-
- return (count == 0) ? -ENOENT : 0;
-}
-
-int
-kranal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
-{
- struct libcfs_ioctl_data *data = arg;
- int rc = -EINVAL;
-
- LASSERT (ni == kranal_data.kra_ni);
-
- switch(cmd) {
- case IOC_LIBCFS_GET_PEER: {
- lnet_nid_t nid = 0;
- __u32 ip = 0;
- int port = 0;
- int share_count = 0;
-
- rc = kranal_get_peer_info(data->ioc_count,
- &nid, &ip, &port, &share_count);
- data->ioc_nid = nid;
- data->ioc_count = share_count;
- data->ioc_u32[0] = ip;
- data->ioc_u32[1] = port;
- break;
- }
- case IOC_LIBCFS_ADD_PEER: {
- rc = kranal_add_persistent_peer(data->ioc_nid,
- data->ioc_u32[0], /* IP */
- data->ioc_u32[1]); /* port */
- break;
- }
- case IOC_LIBCFS_DEL_PEER: {
- rc = kranal_del_peer(data->ioc_nid);
- break;
- }
- case IOC_LIBCFS_GET_CONN: {
- kra_conn_t *conn = kranal_get_conn_by_idx(data->ioc_count);
-
- if (conn == NULL)
- rc = -ENOENT;
- else {
- rc = 0;
- data->ioc_nid = conn->rac_peer->rap_nid;
- data->ioc_u32[0] = conn->rac_device->rad_id;
- kranal_conn_decref(conn);
- }
- break;
- }
- case IOC_LIBCFS_CLOSE_CONNECTION: {
- rc = kranal_close_matching_conns(data->ioc_nid);
- break;
- }
- case IOC_LIBCFS_REGISTER_MYNID: {
- /* Ignore if this is a noop */
- if (data->ioc_nid == ni->ni_nid) {
- rc = 0;
- } else {
- CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n",
- libcfs_nid2str(data->ioc_nid),
- libcfs_nid2str(ni->ni_nid));
- rc = -EINVAL;
- }
- break;
- }
- }
-
- return rc;
-}
-
-void
-kranal_free_txdescs(cfs_list_t *freelist)
-{
- kra_tx_t *tx;
-
- while (!cfs_list_empty(freelist)) {
- tx = cfs_list_entry(freelist->next, kra_tx_t, tx_list);
-
- cfs_list_del(&tx->tx_list);
- LIBCFS_FREE(tx->tx_phys, LNET_MAX_IOV * sizeof(*tx->tx_phys));
- LIBCFS_FREE(tx, sizeof(*tx));
- }
-}
-
-int
-kranal_alloc_txdescs(cfs_list_t *freelist, int n)
-{
- int i;
- kra_tx_t *tx;
-
- LASSERT (freelist == &kranal_data.kra_idle_txs);
- LASSERT (cfs_list_empty(freelist));
-
- for (i = 0; i < n; i++) {
-
- LIBCFS_ALLOC(tx, sizeof(*tx));
- if (tx == NULL) {
- CERROR("Can't allocate tx[%d]\n", i);
- kranal_free_txdescs(freelist);
- return -ENOMEM;
- }
-
- LIBCFS_ALLOC(tx->tx_phys,
- LNET_MAX_IOV * sizeof(*tx->tx_phys));
- if (tx->tx_phys == NULL) {
- CERROR("Can't allocate tx[%d]->tx_phys\n", i);
-
- LIBCFS_FREE(tx, sizeof(*tx));
- kranal_free_txdescs(freelist);
- return -ENOMEM;
- }
-
- tx->tx_buftype = RANAL_BUF_NONE;
- tx->tx_msg.ram_type = RANAL_MSG_NONE;
-
- cfs_list_add(&tx->tx_list, freelist);
- }
-
- return 0;
-}
-
-int
-kranal_device_init(int id, kra_device_t *dev)
-{
- int total_ntx = *kranal_tunables.kra_ntx;
- RAP_RETURN rrc;
-
- dev->rad_id = id;
- rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
- &dev->rad_handle);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
- goto failed_0;
- }
-
- rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't reserve %d RDMA descriptors"
- " for device %d: %d\n", total_ntx, id, rrc);
- goto failed_1;
- }
-
- rrc = RapkCreateCQ(dev->rad_handle, total_ntx, RAP_CQTYPE_SEND,
- &dev->rad_rdma_cqh);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't create rdma cq size %d for device %d: %d\n",
- total_ntx, id, rrc);
- goto failed_1;
- }
-
- rrc = RapkCreateCQ(dev->rad_handle,
- *kranal_tunables.kra_fma_cq_size,
- RAP_CQTYPE_RECV, &dev->rad_fma_cqh);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't create fma cq size %d for device %d: %d\n",
- *kranal_tunables.kra_fma_cq_size, id, rrc);
- goto failed_2;
- }
-
- return 0;
-
- failed_2:
- RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
- failed_1:
- RapkReleaseDevice(dev->rad_handle);
- failed_0:
- return -ENODEV;
-}
-
-void
-kranal_device_fini(kra_device_t *dev)
-{
- LASSERT (cfs_list_empty(&dev->rad_ready_conns));
- LASSERT (cfs_list_empty(&dev->rad_new_conns));
- LASSERT (dev->rad_nphysmap == 0);
- LASSERT (dev->rad_nppphysmap == 0);
- LASSERT (dev->rad_nvirtmap == 0);
- LASSERT (dev->rad_nobvirtmap == 0);
-
- LASSERT(dev->rad_scheduler == NULL);
- RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cqh);
- RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cqh);
- RapkReleaseDevice(dev->rad_handle);
-}
-
-void
-kranal_shutdown (lnet_ni_t *ni)
-{
- int i;
- unsigned long flags;
-
- CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
- atomic_read(&libcfs_kmemory));
-
- LASSERT (ni == kranal_data.kra_ni);
- LASSERT (ni->ni_data == &kranal_data);
-
- switch (kranal_data.kra_init) {
- default:
- CERROR("Unexpected state %d\n", kranal_data.kra_init);
- LBUG();
-
- case RANAL_INIT_ALL:
- /* Prevent new peers from being created */
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
- kranal_data.kra_nonewpeers = 1;
- write_unlock_irqrestore(&kranal_data.kra_global_lock,
- flags);
-
- /* Remove all existing peers from the peer table */
- kranal_del_peer(LNET_NID_ANY);
-
- /* Wait for pending conn reqs to be handled */
- i = 2;
- spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
- while (!cfs_list_empty(&kranal_data.kra_connd_acceptq)) {
- spin_unlock_irqrestore(&kranal_data.kra_connd_lock,
- flags);
- i++;
- CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n */
- "waiting for conn reqs to clean up\n");
- cfs_pause(cfs_time_seconds(1));
-
- spin_lock_irqsave(&kranal_data.kra_connd_lock,
- flags);
- }
- spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
-
- /* Wait for all peers to be freed */
- i = 2;
- while (atomic_read(&kranal_data.kra_npeers) != 0) {
- i++;
- CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* 2**n */
- "waiting for %d peers to close down\n",
- atomic_read(&kranal_data.kra_npeers));
- cfs_pause(cfs_time_seconds(1));
- }
- /* fall through */
-
- case RANAL_INIT_DATA:
- break;
- }
-
- /* Peer state all cleaned up BEFORE setting shutdown, so threads don't
- * have to worry about shutdown races. NB connections may be created
- * while there are still active connds, but these will be temporary
- * since peer creation always fails after the listener has started to
- * shut down. */
- LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
-
- /* Flag threads to terminate */
- kranal_data.kra_shutdown = 1;
-
- for (i = 0; i < kranal_data.kra_ndevs; i++) {
- kra_device_t *dev = &kranal_data.kra_devices[i];
-
- spin_lock_irqsave(&dev->rad_lock, flags);
- wake_up(&dev->rad_waitq);
- spin_unlock_irqrestore(&dev->rad_lock, flags);
- }
-
- spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
- wake_up_all(&kranal_data.kra_reaper_waitq);
- spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
-
- LASSERT (cfs_list_empty(&kranal_data.kra_connd_peers));
- spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
- wake_up_all(&kranal_data.kra_connd_waitq);
- spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
-
- /* Wait for threads to exit */
- i = 2;
- while (atomic_read(&kranal_data.kra_nthreads) != 0) {
- i++;
- CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
- "Waiting for %d threads to terminate\n",
- atomic_read(&kranal_data.kra_nthreads));
- cfs_pause(cfs_time_seconds(1));
- }
-
- LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
- if (kranal_data.kra_peers != NULL) {
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
- LASSERT (cfs_list_empty(&kranal_data.kra_peers[i]));
-
- LIBCFS_FREE(kranal_data.kra_peers,
- sizeof (cfs_list_t) *
- kranal_data.kra_peer_hash_size);
- }
-
- LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
- if (kranal_data.kra_conns != NULL) {
- for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
- LASSERT (cfs_list_empty(&kranal_data.kra_conns[i]));
-
- LIBCFS_FREE(kranal_data.kra_conns,
- sizeof (cfs_list_t) *
- kranal_data.kra_conn_hash_size);
- }
-
- for (i = 0; i < kranal_data.kra_ndevs; i++)
- kranal_device_fini(&kranal_data.kra_devices[i]);
-
- kranal_free_txdescs(&kranal_data.kra_idle_txs);
-
- CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
- atomic_read(&libcfs_kmemory));
-
- kranal_data.kra_init = RANAL_INIT_NOTHING;
- module_put(THIS_MODULE);
-}
-
-int
-kranal_startup (lnet_ni_t *ni)
-{
- struct timeval tv;
- int pkmem = atomic_read(&libcfs_kmemory);
- int rc;
- int i;
- kra_device_t *dev;
- char name[16];
-
- LASSERT (ni->ni_lnd == &the_kralnd);
-
- /* Only 1 instance supported */
- if (kranal_data.kra_init != RANAL_INIT_NOTHING) {
- CERROR ("Only 1 instance supported\n");
- return -EPERM;
- }
-
- if (lnet_set_ip_niaddr(ni) != 0) {
- CERROR ("Can't determine my NID\n");
- return -EPERM;
- }
-
- if (*kranal_tunables.kra_credits > *kranal_tunables.kra_ntx) {
- CERROR ("Can't set credits(%d) > ntx(%d)\n",
- *kranal_tunables.kra_credits,
- *kranal_tunables.kra_ntx);
- return -EINVAL;
- }
-
- memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
-
- ni->ni_maxtxcredits = *kranal_tunables.kra_credits;
- ni->ni_peertxcredits = *kranal_tunables.kra_peercredits;
-
- ni->ni_data = &kranal_data;
- kranal_data.kra_ni = ni;
-
- /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
- * a unique (for all time) connstamp so we can uniquely identify
- * the sender. The connstamp is an incrementing counter
- * initialised with seconds + microseconds at startup time. So we
- * rely on NOT creating connections more frequently on average than
- * 1MHz to ensure we don't use old connstamps when we reboot. */
- do_gettimeofday(&tv);
- kranal_data.kra_connstamp =
- kranal_data.kra_peerstamp = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
-
- rwlock_init(&kranal_data.kra_global_lock);
-
- for (i = 0; i < RANAL_MAXDEVS; i++ ) {
- kra_device_t *dev = &kranal_data.kra_devices[i];
-
- dev->rad_idx = i;
- CFS_INIT_LIST_HEAD(&dev->rad_ready_conns);
- CFS_INIT_LIST_HEAD(&dev->rad_new_conns);
- init_waitqueue_head(&dev->rad_waitq);
- spin_lock_init(&dev->rad_lock);
- }
-
- kranal_data.kra_new_min_timeout = MAX_SCHEDULE_TIMEOUT;
- init_waitqueue_head(&kranal_data.kra_reaper_waitq);
- spin_lock_init(&kranal_data.kra_reaper_lock);
-
- CFS_INIT_LIST_HEAD(&kranal_data.kra_connd_acceptq);
- CFS_INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
- init_waitqueue_head(&kranal_data.kra_connd_waitq);
- spin_lock_init(&kranal_data.kra_connd_lock);
-
- CFS_INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
- spin_lock_init(&kranal_data.kra_tx_lock);
-
- /* OK to call kranal_api_shutdown() to cleanup now */
- kranal_data.kra_init = RANAL_INIT_DATA;
- try_module_get(THIS_MODULE);
-
- kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
- LIBCFS_ALLOC(kranal_data.kra_peers,
- sizeof(cfs_list_t) *
- kranal_data.kra_peer_hash_size);
- if (kranal_data.kra_peers == NULL)
- goto failed;
-
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
- CFS_INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
-
- kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
- LIBCFS_ALLOC(kranal_data.kra_conns,
- sizeof(cfs_list_t) *
- kranal_data.kra_conn_hash_size);
- if (kranal_data.kra_conns == NULL)
- goto failed;
-
- for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
- CFS_INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
-
- rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs,
- *kranal_tunables.kra_ntx);
- if (rc != 0)
- goto failed;
-
- rc = kranal_thread_start(kranal_reaper, NULL, "kranal_reaper");
- if (rc != 0) {
- CERROR("Can't spawn ranal reaper: %d\n", rc);
- goto failed;
- }
-
- for (i = 0; i < *kranal_tunables.kra_n_connd; i++) {
- snprintf(name, sizeof(name), "kranal_connd_%02ld", i);
- rc = kranal_thread_start(kranal_connd,
- (void *)(unsigned long)i, name);
- if (rc != 0) {
- CERROR("Can't spawn ranal connd[%d]: %d\n",
- i, rc);
- goto failed;
- }
- }
-
- LASSERT (kranal_data.kra_ndevs == 0);
-
- /* Use all available RapidArray devices */
- for (i = 0; i < RANAL_MAXDEVS; i++) {
- dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
-
- rc = kranal_device_init(kranal_devids[i], dev);
- if (rc == 0)
- kranal_data.kra_ndevs++;
- }
-
- if (kranal_data.kra_ndevs == 0) {
- CERROR("Can't initialise any RapidArray devices\n");
- goto failed;
- }
-
- for (i = 0; i < kranal_data.kra_ndevs; i++) {
- dev = &kranal_data.kra_devices[i];
- snprintf(name, sizeof(name), "kranal_sd_%02d", dev->rad_idx);
- rc = kranal_thread_start(kranal_scheduler, dev, name);
- if (rc != 0) {
- CERROR("Can't spawn ranal scheduler[%d]: %d\n",
- i, rc);
- goto failed;
- }
- }
-
- /* flag everything initialised */
- kranal_data.kra_init = RANAL_INIT_ALL;
- /*****************************************************/
-
- CDEBUG(D_MALLOC, "initial kmem %d\n", pkmem);
- return 0;
-
- failed:
- kranal_shutdown(ni);
- return -ENETDOWN;
-}
-
-void __exit
-kranal_module_fini (void)
-{
- lnet_unregister_lnd(&the_kralnd);
- kranal_tunables_fini();
-}
-
-int __init
-kranal_module_init (void)
-{
- int rc;
-
- rc = kranal_tunables_init();
- if (rc != 0)
- return rc;
-
- lnet_register_lnd(&the_kralnd);
-
- return 0;
-}
-
-MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Kernel RapidArray LND v0.01");
-MODULE_LICENSE("GPL");
-
-module_init(kranal_module_init);
-module_exit(kranal_module_fini);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff