4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LNET
35 #include <linux/ctype.h>
36 #include <linux/log2.h>
37 #include <linux/ktime.h>
38 #include <linux/moduleparam.h>
39 #include <linux/uaccess.h>
40 #ifdef HAVE_SCHED_HEADERS
41 #include <linux/sched/signal.h>
44 #include <lnet/lib-lnet.h>
46 #define D_LNI D_CONSOLE
49 * initialize ln_api_mutex statically, since it needs to be used in
50 * discovery_set callback. That module parameter callback can be called
51 * before module init completes. The mutex needs to be ready for use then.
53 struct lnet the_lnet = {
54 .ln_api_mutex = __MUTEX_INITIALIZER(the_lnet.ln_api_mutex),
55 }; /* THE state of the network */
56 EXPORT_SYMBOL(the_lnet);
58 static char *ip2nets = "";
59 module_param(ip2nets, charp, 0444);
60 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
62 static char *networks = "";
63 module_param(networks, charp, 0444);
64 MODULE_PARM_DESC(networks, "local networks");
66 static char *routes = "";
67 module_param(routes, charp, 0444);
68 MODULE_PARM_DESC(routes, "routes to non-local networks");
70 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
71 module_param(rnet_htable_size, int, 0444);
72 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
74 static int use_tcp_bonding = false;
75 module_param(use_tcp_bonding, int, 0444);
76 MODULE_PARM_DESC(use_tcp_bonding,
77 "Set to 1 to use socklnd bonding. 0 to use Multi-Rail");
79 unsigned int lnet_numa_range = 0;
80 module_param(lnet_numa_range, uint, 0444);
81 MODULE_PARM_DESC(lnet_numa_range,
82 "NUMA range to consider during Multi-Rail selection");
85 * lnet_health_sensitivity determines by how much we decrement the health
86 * value on sending error. The value defaults to 100, which means health
87 * interface health is decremented by 100 points every failure.
89 unsigned int lnet_health_sensitivity = 100;
90 static int sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp);
91 #ifdef HAVE_KERNEL_PARAM_OPS
92 static struct kernel_param_ops param_ops_health_sensitivity = {
93 .set = sensitivity_set,
96 #define param_check_health_sensitivity(name, p) \
97 __param_check(name, p, int)
98 module_param(lnet_health_sensitivity, health_sensitivity, S_IRUGO|S_IWUSR);
100 module_param_call(lnet_health_sensitivity, sensitivity_set, param_get_int,
101 &lnet_health_sensitivity, S_IRUGO|S_IWUSR);
103 MODULE_PARM_DESC(lnet_health_sensitivity,
104 "Value to decrement the health value by on error");
107 * lnet_recovery_interval determines how often we should perform recovery
108 * on unhealthy interfaces.
110 unsigned int lnet_recovery_interval = 1;
111 static int recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp);
112 #ifdef HAVE_KERNEL_PARAM_OPS
113 static struct kernel_param_ops param_ops_recovery_interval = {
114 .set = recovery_interval_set,
115 .get = param_get_int,
117 #define param_check_recovery_interval(name, p) \
118 __param_check(name, p, int)
119 module_param(lnet_recovery_interval, recovery_interval, S_IRUGO|S_IWUSR);
121 module_param_call(lnet_recovery_interval, recovery_interval_set, param_get_int,
122 &lnet_recovery_interval, S_IRUGO|S_IWUSR);
124 MODULE_PARM_DESC(lnet_recovery_interval,
125 "Interval to recover unhealthy interfaces in seconds");
127 static int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
128 static int intf_max_set(const char *val, cfs_kernel_param_arg_t *kp);
130 static struct kernel_param_ops param_ops_interfaces_max = {
132 .get = param_get_int,
135 #define param_check_interfaces_max(name, p) \
136 __param_check(name, p, int)
138 #ifdef HAVE_KERNEL_PARAM_OPS
139 module_param(lnet_interfaces_max, interfaces_max, 0644);
141 module_param_call(lnet_interfaces_max, intf_max_set, param_get_int,
142 ¶m_ops_interfaces_max, 0644);
144 MODULE_PARM_DESC(lnet_interfaces_max,
145 "Maximum number of interfaces in a node.");
147 unsigned lnet_peer_discovery_disabled = 0;
148 static int discovery_set(const char *val, cfs_kernel_param_arg_t *kp);
150 static struct kernel_param_ops param_ops_discovery_disabled = {
151 .set = discovery_set,
152 .get = param_get_int,
155 #define param_check_discovery_disabled(name, p) \
156 __param_check(name, p, int)
157 #ifdef HAVE_KERNEL_PARAM_OPS
158 module_param(lnet_peer_discovery_disabled, discovery_disabled, 0644);
160 module_param_call(lnet_peer_discovery_disabled, discovery_set, param_get_int,
161 ¶m_ops_discovery_disabled, 0644);
163 MODULE_PARM_DESC(lnet_peer_discovery_disabled,
164 "Set to 1 to disable peer discovery on this node.");
166 unsigned int lnet_drop_asym_route;
167 static int drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp);
169 static struct kernel_param_ops param_ops_drop_asym_route = {
170 .set = drop_asym_route_set,
171 .get = param_get_int,
174 #define param_check_drop_asym_route(name, p) \
175 __param_check(name, p, int)
176 #ifdef HAVE_KERNEL_PARAM_OPS
177 module_param(lnet_drop_asym_route, drop_asym_route, 0644);
179 module_param_call(lnet_drop_asym_route, drop_asym_route_set, param_get_int,
180 ¶m_ops_drop_asym_route, 0644);
182 MODULE_PARM_DESC(lnet_drop_asym_route,
183 "Set to 1 to drop asymmetrical route messages.");
185 #define LNET_TRANSACTION_TIMEOUT_NO_HEALTH_DEFAULT 50
186 #define LNET_TRANSACTION_TIMEOUT_HEALTH_DEFAULT 50
188 unsigned lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_HEALTH_DEFAULT;
189 static int transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp);
190 #ifdef HAVE_KERNEL_PARAM_OPS
191 static struct kernel_param_ops param_ops_transaction_timeout = {
192 .set = transaction_to_set,
193 .get = param_get_int,
196 #define param_check_transaction_timeout(name, p) \
197 __param_check(name, p, int)
198 module_param(lnet_transaction_timeout, transaction_timeout, S_IRUGO|S_IWUSR);
200 module_param_call(lnet_transaction_timeout, transaction_to_set, param_get_int,
201 &lnet_transaction_timeout, S_IRUGO|S_IWUSR);
203 MODULE_PARM_DESC(lnet_transaction_timeout,
204 "Maximum number of seconds to wait for a peer response.");
206 #define LNET_RETRY_COUNT_HEALTH_DEFAULT 2
207 unsigned lnet_retry_count = LNET_RETRY_COUNT_HEALTH_DEFAULT;
208 static int retry_count_set(const char *val, cfs_kernel_param_arg_t *kp);
209 #ifdef HAVE_KERNEL_PARAM_OPS
210 static struct kernel_param_ops param_ops_retry_count = {
211 .set = retry_count_set,
212 .get = param_get_int,
215 #define param_check_retry_count(name, p) \
216 __param_check(name, p, int)
217 module_param(lnet_retry_count, retry_count, S_IRUGO|S_IWUSR);
219 module_param_call(lnet_retry_count, retry_count_set, param_get_int,
220 &lnet_retry_count, S_IRUGO|S_IWUSR);
222 MODULE_PARM_DESC(lnet_retry_count,
223 "Maximum number of times to retry transmitting a message");
226 unsigned lnet_lnd_timeout = LNET_LND_DEFAULT_TIMEOUT;
227 unsigned int lnet_current_net_count;
230 * This sequence number keeps track of how many times DLC was used to
231 * update the local NIs. It is incremented when a NI is added or
232 * removed and checked when sending a message to determine if there is
233 * a need to re-run the selection algorithm. See lnet_select_pathway()
234 * for more details on its usage.
236 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
238 static int lnet_ping(struct lnet_process_id id, signed long timeout,
239 struct lnet_process_id __user *ids, int n_ids);
241 static int lnet_discover(struct lnet_process_id id, __u32 force,
242 struct lnet_process_id __user *ids, int n_ids);
245 sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp)
248 unsigned *sensitivity = (unsigned *)kp->arg;
251 rc = kstrtoul(val, 0, &value);
253 CERROR("Invalid module parameter value for 'lnet_health_sensitivity'\n");
258 * The purpose of locking the api_mutex here is to ensure that
259 * the correct value ends up stored properly.
261 mutex_lock(&the_lnet.ln_api_mutex);
263 if (value > LNET_MAX_HEALTH_VALUE) {
264 mutex_unlock(&the_lnet.ln_api_mutex);
265 CERROR("Invalid health value. Maximum: %d value = %lu\n",
266 LNET_MAX_HEALTH_VALUE, value);
271 * if we're turning on health then use the health timeout
274 if (*sensitivity == 0 && value != 0) {
275 lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_HEALTH_DEFAULT;
276 lnet_retry_count = LNET_RETRY_COUNT_HEALTH_DEFAULT;
278 * if we're turning off health then use the no health timeout
281 } else if (*sensitivity != 0 && value == 0) {
282 lnet_transaction_timeout =
283 LNET_TRANSACTION_TIMEOUT_NO_HEALTH_DEFAULT;
284 lnet_retry_count = 0;
287 *sensitivity = value;
289 mutex_unlock(&the_lnet.ln_api_mutex);
295 recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp)
298 unsigned *interval = (unsigned *)kp->arg;
301 rc = kstrtoul(val, 0, &value);
303 CERROR("Invalid module parameter value for 'lnet_recovery_interval'\n");
308 CERROR("lnet_recovery_interval must be at least 1 second\n");
313 * The purpose of locking the api_mutex here is to ensure that
314 * the correct value ends up stored properly.
316 mutex_lock(&the_lnet.ln_api_mutex);
320 mutex_unlock(&the_lnet.ln_api_mutex);
326 discovery_set(const char *val, cfs_kernel_param_arg_t *kp)
329 unsigned *discovery = (unsigned *)kp->arg;
331 struct lnet_ping_buffer *pbuf;
333 rc = kstrtoul(val, 0, &value);
335 CERROR("Invalid module parameter value for 'lnet_peer_discovery_disabled'\n");
339 value = (value) ? 1 : 0;
342 * The purpose of locking the api_mutex here is to ensure that
343 * the correct value ends up stored properly.
345 mutex_lock(&the_lnet.ln_api_mutex);
347 if (value == *discovery) {
348 mutex_unlock(&the_lnet.ln_api_mutex);
353 * We still want to set the discovery value even when LNet is not
354 * running. This is the case when LNet is being loaded and we want
355 * the module parameters to take effect. Otherwise if we're
356 * changing the value dynamically, we want to set it after
359 if (the_lnet.ln_state != LNET_STATE_RUNNING) {
361 mutex_unlock(&the_lnet.ln_api_mutex);
365 /* tell peers that discovery setting has changed */
366 lnet_net_lock(LNET_LOCK_EX);
367 pbuf = the_lnet.ln_ping_target;
369 pbuf->pb_info.pi_features &= ~LNET_PING_FEAT_DISCOVERY;
371 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
372 lnet_net_unlock(LNET_LOCK_EX);
375 * Always update the peers. This will result in a push to the
376 * peers with the updated capabilities feature mask. The peer can
377 * then take appropriate action to update its representation of
380 * If discovery is already off, turn it on first before pushing
381 * the update. The discovery flag must be on before pushing.
382 * otherwise if the flag is on and we're turning it off then push
383 * first before turning the flag off. In the former case the flag
384 * is being set twice, but I find it's better to do that rather
385 * than have duplicate code in an if/else statement.
387 if (*discovery > 0 && value == 0)
389 lnet_push_update_to_peers(1);
392 mutex_unlock(&the_lnet.ln_api_mutex);
398 drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp)
401 unsigned int *drop_asym_route = (unsigned int *)kp->arg;
404 rc = kstrtoul(val, 0, &value);
406 CERROR("Invalid module parameter value for "
407 "'lnet_drop_asym_route'\n");
412 * The purpose of locking the api_mutex here is to ensure that
413 * the correct value ends up stored properly.
415 mutex_lock(&the_lnet.ln_api_mutex);
417 if (value == *drop_asym_route) {
418 mutex_unlock(&the_lnet.ln_api_mutex);
422 *drop_asym_route = value;
424 mutex_unlock(&the_lnet.ln_api_mutex);
430 transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp)
433 unsigned *transaction_to = (unsigned *)kp->arg;
436 rc = kstrtoul(val, 0, &value);
438 CERROR("Invalid module parameter value for 'lnet_transaction_timeout'\n");
443 * The purpose of locking the api_mutex here is to ensure that
444 * the correct value ends up stored properly.
446 mutex_lock(&the_lnet.ln_api_mutex);
448 if (value < lnet_retry_count || value == 0) {
449 mutex_unlock(&the_lnet.ln_api_mutex);
450 CERROR("Invalid value for lnet_transaction_timeout (%lu). "
451 "Has to be greater than lnet_retry_count (%u)\n",
452 value, lnet_retry_count);
456 if (value == *transaction_to) {
457 mutex_unlock(&the_lnet.ln_api_mutex);
461 *transaction_to = value;
462 if (lnet_retry_count == 0)
463 lnet_lnd_timeout = value;
465 lnet_lnd_timeout = value / lnet_retry_count;
467 mutex_unlock(&the_lnet.ln_api_mutex);
473 retry_count_set(const char *val, cfs_kernel_param_arg_t *kp)
476 unsigned *retry_count = (unsigned *)kp->arg;
479 rc = kstrtoul(val, 0, &value);
481 CERROR("Invalid module parameter value for 'lnet_retry_count'\n");
486 * The purpose of locking the api_mutex here is to ensure that
487 * the correct value ends up stored properly.
489 mutex_lock(&the_lnet.ln_api_mutex);
491 if (lnet_health_sensitivity == 0) {
492 mutex_unlock(&the_lnet.ln_api_mutex);
493 CERROR("Can not set retry_count when health feature is turned off\n");
497 if (value > lnet_transaction_timeout) {
498 mutex_unlock(&the_lnet.ln_api_mutex);
499 CERROR("Invalid value for lnet_retry_count (%lu). "
500 "Has to be smaller than lnet_transaction_timeout (%u)\n",
501 value, lnet_transaction_timeout);
505 *retry_count = value;
508 lnet_lnd_timeout = lnet_transaction_timeout;
510 lnet_lnd_timeout = lnet_transaction_timeout / value;
512 mutex_unlock(&the_lnet.ln_api_mutex);
518 intf_max_set(const char *val, cfs_kernel_param_arg_t *kp)
522 rc = kstrtoint(val, 0, &value);
524 CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
528 if (value < LNET_INTERFACES_MIN) {
529 CWARN("max interfaces provided are too small, setting to %d\n",
530 LNET_INTERFACES_MAX_DEFAULT);
531 value = LNET_INTERFACES_MAX_DEFAULT;
534 *(int *)kp->arg = value;
540 lnet_get_routes(void)
546 lnet_get_networks(void)
551 if (*networks != 0 && *ip2nets != 0) {
552 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
553 "'ip2nets' but not both at once\n");
558 rc = lnet_parse_ip2nets(&nets, ip2nets);
559 return (rc == 0) ? nets : NULL;
569 lnet_init_locks(void)
571 spin_lock_init(&the_lnet.ln_eq_wait_lock);
572 spin_lock_init(&the_lnet.ln_msg_resend_lock);
573 init_completion(&the_lnet.ln_mt_wait_complete);
574 mutex_init(&the_lnet.ln_lnd_mutex);
577 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
578 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
580 struct kmem_cache *lnet_rspt_cachep; /* response tracker cache */
581 struct kmem_cache *lnet_msg_cachep;
584 lnet_slab_setup(void)
586 /* create specific kmem_cache for MEs and small MDs (i.e., originally
587 * allocated in <size-xxx> kmem_cache).
589 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
591 if (!lnet_mes_cachep)
594 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
595 LNET_SMALL_MD_SIZE, 0, 0,
597 if (!lnet_small_mds_cachep)
600 lnet_rspt_cachep = kmem_cache_create("lnet_rspt", sizeof(struct lnet_rsp_tracker),
602 if (!lnet_rspt_cachep)
605 lnet_msg_cachep = kmem_cache_create("lnet_msg", sizeof(struct lnet_msg),
607 if (!lnet_msg_cachep)
614 lnet_slab_cleanup(void)
616 if (lnet_msg_cachep) {
617 kmem_cache_destroy(lnet_msg_cachep);
618 lnet_msg_cachep = NULL;
622 if (lnet_rspt_cachep) {
623 kmem_cache_destroy(lnet_rspt_cachep);
624 lnet_rspt_cachep = NULL;
627 if (lnet_small_mds_cachep) {
628 kmem_cache_destroy(lnet_small_mds_cachep);
629 lnet_small_mds_cachep = NULL;
632 if (lnet_mes_cachep) {
633 kmem_cache_destroy(lnet_mes_cachep);
634 lnet_mes_cachep = NULL;
639 lnet_create_remote_nets_table(void)
642 struct list_head *hash;
644 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
645 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
646 CFS_ALLOC_PTR_ARRAY(hash, LNET_REMOTE_NETS_HASH_SIZE);
648 CERROR("Failed to create remote nets hash table\n");
652 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
653 INIT_LIST_HEAD(&hash[i]);
654 the_lnet.ln_remote_nets_hash = hash;
659 lnet_destroy_remote_nets_table(void)
663 if (the_lnet.ln_remote_nets_hash == NULL)
666 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
667 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
669 CFS_FREE_PTR_ARRAY(the_lnet.ln_remote_nets_hash,
670 LNET_REMOTE_NETS_HASH_SIZE);
671 the_lnet.ln_remote_nets_hash = NULL;
675 lnet_destroy_locks(void)
677 if (the_lnet.ln_res_lock != NULL) {
678 cfs_percpt_lock_free(the_lnet.ln_res_lock);
679 the_lnet.ln_res_lock = NULL;
682 if (the_lnet.ln_net_lock != NULL) {
683 cfs_percpt_lock_free(the_lnet.ln_net_lock);
684 the_lnet.ln_net_lock = NULL;
689 lnet_create_locks(void)
693 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
694 if (the_lnet.ln_res_lock == NULL)
697 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
698 if (the_lnet.ln_net_lock == NULL)
704 lnet_destroy_locks();
708 static void lnet_assert_wire_constants(void)
710 /* Wire protocol assertions generated by 'wirecheck'
711 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
712 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
713 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
716 BUILD_BUG_ON(LNET_PROTO_TCP_MAGIC != 0xeebc0ded);
717 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MAJOR != 1);
718 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MINOR != 0);
719 BUILD_BUG_ON(LNET_MSG_ACK != 0);
720 BUILD_BUG_ON(LNET_MSG_PUT != 1);
721 BUILD_BUG_ON(LNET_MSG_GET != 2);
722 BUILD_BUG_ON(LNET_MSG_REPLY != 3);
723 BUILD_BUG_ON(LNET_MSG_HELLO != 4);
725 /* Checks for struct lnet_handle_wire */
726 BUILD_BUG_ON((int)sizeof(struct lnet_handle_wire) != 16);
727 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
728 wh_interface_cookie) != 0);
729 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) != 8);
730 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
731 wh_object_cookie) != 8);
732 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) != 8);
734 /* Checks for struct struct lnet_magicversion */
735 BUILD_BUG_ON((int)sizeof(struct lnet_magicversion) != 8);
736 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, magic) != 0);
737 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->magic) != 4);
738 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_major) != 4);
739 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_major) != 2);
740 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion,
741 version_minor) != 6);
742 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_minor) != 2);
744 /* Checks for struct struct lnet_hdr */
745 BUILD_BUG_ON((int)sizeof(struct lnet_hdr) != 72);
746 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_nid) != 0);
747 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_nid) != 8);
748 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_nid) != 8);
749 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_nid) != 8);
750 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_pid) != 16);
751 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_pid) != 4);
752 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_pid) != 20);
753 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_pid) != 4);
754 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, type) != 24);
755 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->type) != 4);
756 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, payload_length) != 28);
757 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->payload_length) != 4);
758 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg) != 32);
759 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg) != 40);
762 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) != 32);
763 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) != 16);
764 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.match_bits) != 48);
765 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) != 8);
766 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.mlength) != 56);
767 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) != 4);
770 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) != 32);
771 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) != 16);
772 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.match_bits) != 48);
773 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) != 8);
774 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.hdr_data) != 56);
775 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) != 8);
776 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ptl_index) != 64);
777 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) != 4);
778 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.offset) != 68);
779 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) != 4);
782 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.return_wmd) != 32);
783 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) != 16);
784 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.match_bits) != 48);
785 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) != 8);
786 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.ptl_index) != 56);
787 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) != 4);
788 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.src_offset) != 60);
789 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) != 4);
790 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.sink_length) != 64);
791 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) != 4);
794 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) != 32);
795 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) != 16);
798 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.incarnation) != 32);
799 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) != 8);
800 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.type) != 40);
801 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) != 4);
803 /* Checks for struct lnet_ni_status and related constants */
804 BUILD_BUG_ON(LNET_NI_STATUS_INVALID != 0x00000000);
805 BUILD_BUG_ON(LNET_NI_STATUS_UP != 0x15aac0de);
806 BUILD_BUG_ON(LNET_NI_STATUS_DOWN != 0xdeadface);
808 /* Checks for struct lnet_ni_status */
809 BUILD_BUG_ON((int)sizeof(struct lnet_ni_status) != 16);
810 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_nid) != 0);
811 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_nid) != 8);
812 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_status) != 8);
813 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_status) != 4);
814 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_unused) != 12);
815 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_unused) != 4);
817 /* Checks for struct lnet_ping_info and related constants */
818 BUILD_BUG_ON(LNET_PROTO_PING_MAGIC != 0x70696E67);
819 BUILD_BUG_ON(LNET_PING_FEAT_INVAL != 0);
820 BUILD_BUG_ON(LNET_PING_FEAT_BASE != 1);
821 BUILD_BUG_ON(LNET_PING_FEAT_NI_STATUS != 2);
822 BUILD_BUG_ON(LNET_PING_FEAT_RTE_DISABLED != 4);
823 BUILD_BUG_ON(LNET_PING_FEAT_MULTI_RAIL != 8);
824 BUILD_BUG_ON(LNET_PING_FEAT_DISCOVERY != 16);
825 BUILD_BUG_ON(LNET_PING_FEAT_BITS != 31);
827 /* Checks for struct lnet_ping_info */
828 BUILD_BUG_ON((int)sizeof(struct lnet_ping_info) != 16);
829 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_magic) != 0);
830 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_magic) != 4);
831 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_features) != 4);
832 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_features) != 4);
833 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_pid) != 8);
834 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_pid) != 4);
835 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_nnis) != 12);
836 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_nnis) != 4);
837 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_ni) != 16);
838 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_ni) != 0);
841 static const struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
843 const struct lnet_lnd *lnd;
845 /* holding lnd mutex */
846 if (type >= NUM_LNDS)
848 lnd = the_lnet.ln_lnds[type];
849 LASSERT(!lnd || lnd->lnd_type == type);
855 lnet_get_lnd_timeout(void)
857 return lnet_lnd_timeout;
859 EXPORT_SYMBOL(lnet_get_lnd_timeout);
862 lnet_register_lnd(const struct lnet_lnd *lnd)
864 mutex_lock(&the_lnet.ln_lnd_mutex);
866 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
867 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
869 the_lnet.ln_lnds[lnd->lnd_type] = lnd;
871 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
873 mutex_unlock(&the_lnet.ln_lnd_mutex);
875 EXPORT_SYMBOL(lnet_register_lnd);
878 lnet_unregister_lnd(const struct lnet_lnd *lnd)
880 mutex_lock(&the_lnet.ln_lnd_mutex);
882 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
884 the_lnet.ln_lnds[lnd->lnd_type] = NULL;
885 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
887 mutex_unlock(&the_lnet.ln_lnd_mutex);
889 EXPORT_SYMBOL(lnet_unregister_lnd);
892 lnet_counters_get_common(struct lnet_counters_common *common)
894 struct lnet_counters *ctr;
897 memset(common, 0, sizeof(*common));
899 lnet_net_lock(LNET_LOCK_EX);
901 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
902 common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
903 common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
904 common->lcc_errors += ctr->lct_common.lcc_errors;
905 common->lcc_send_count += ctr->lct_common.lcc_send_count;
906 common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
907 common->lcc_route_count += ctr->lct_common.lcc_route_count;
908 common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
909 common->lcc_send_length += ctr->lct_common.lcc_send_length;
910 common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
911 common->lcc_route_length += ctr->lct_common.lcc_route_length;
912 common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
914 lnet_net_unlock(LNET_LOCK_EX);
916 EXPORT_SYMBOL(lnet_counters_get_common);
919 lnet_counters_get(struct lnet_counters *counters)
921 struct lnet_counters *ctr;
922 struct lnet_counters_health *health = &counters->lct_health;
925 memset(counters, 0, sizeof(*counters));
927 lnet_counters_get_common(&counters->lct_common);
929 lnet_net_lock(LNET_LOCK_EX);
931 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
932 health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
933 health->lch_resend_count += ctr->lct_health.lch_resend_count;
934 health->lch_response_timeout_count +=
935 ctr->lct_health.lch_response_timeout_count;
936 health->lch_local_interrupt_count +=
937 ctr->lct_health.lch_local_interrupt_count;
938 health->lch_local_dropped_count +=
939 ctr->lct_health.lch_local_dropped_count;
940 health->lch_local_aborted_count +=
941 ctr->lct_health.lch_local_aborted_count;
942 health->lch_local_no_route_count +=
943 ctr->lct_health.lch_local_no_route_count;
944 health->lch_local_timeout_count +=
945 ctr->lct_health.lch_local_timeout_count;
946 health->lch_local_error_count +=
947 ctr->lct_health.lch_local_error_count;
948 health->lch_remote_dropped_count +=
949 ctr->lct_health.lch_remote_dropped_count;
950 health->lch_remote_error_count +=
951 ctr->lct_health.lch_remote_error_count;
952 health->lch_remote_timeout_count +=
953 ctr->lct_health.lch_remote_timeout_count;
954 health->lch_network_timeout_count +=
955 ctr->lct_health.lch_network_timeout_count;
957 lnet_net_unlock(LNET_LOCK_EX);
959 EXPORT_SYMBOL(lnet_counters_get);
962 lnet_counters_reset(void)
964 struct lnet_counters *counters;
967 lnet_net_lock(LNET_LOCK_EX);
969 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
970 memset(counters, 0, sizeof(struct lnet_counters));
972 lnet_net_unlock(LNET_LOCK_EX);
976 lnet_res_type2str(int type)
981 case LNET_COOKIE_TYPE_MD:
983 case LNET_COOKIE_TYPE_ME:
985 case LNET_COOKIE_TYPE_EQ:
991 lnet_res_container_cleanup(struct lnet_res_container *rec)
995 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
998 while (!list_empty(&rec->rec_active)) {
999 struct list_head *e = rec->rec_active.next;
1002 if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
1003 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
1005 } else { /* NB: Active MEs should be attached on portals */
1012 /* Found alive MD/ME/EQ, user really should unlink/free
1013 * all of them before finalize LNet, but if someone didn't,
1014 * we have to recycle garbage for him */
1015 CERROR("%d active elements on exit of %s container\n",
1016 count, lnet_res_type2str(rec->rec_type));
1019 if (rec->rec_lh_hash != NULL) {
1020 CFS_FREE_PTR_ARRAY(rec->rec_lh_hash, LNET_LH_HASH_SIZE);
1021 rec->rec_lh_hash = NULL;
1024 rec->rec_type = 0; /* mark it as finalized */
1028 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
1033 LASSERT(rec->rec_type == 0);
1035 rec->rec_type = type;
1036 INIT_LIST_HEAD(&rec->rec_active);
1038 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
1040 /* Arbitrary choice of hash table size */
1041 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
1042 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
1043 if (rec->rec_lh_hash == NULL) {
1048 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
1049 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
1054 CERROR("Failed to setup %s resource container\n",
1055 lnet_res_type2str(type));
1056 lnet_res_container_cleanup(rec);
1061 lnet_res_containers_destroy(struct lnet_res_container **recs)
1063 struct lnet_res_container *rec;
1066 cfs_percpt_for_each(rec, i, recs)
1067 lnet_res_container_cleanup(rec);
1069 cfs_percpt_free(recs);
1072 static struct lnet_res_container **
1073 lnet_res_containers_create(int type)
1075 struct lnet_res_container **recs;
1076 struct lnet_res_container *rec;
1080 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
1082 CERROR("Failed to allocate %s resource containers\n",
1083 lnet_res_type2str(type));
1087 cfs_percpt_for_each(rec, i, recs) {
1088 rc = lnet_res_container_setup(rec, i, type);
1090 lnet_res_containers_destroy(recs);
1098 struct lnet_libhandle *
1099 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
1101 /* ALWAYS called with lnet_res_lock held */
1102 struct list_head *head;
1103 struct lnet_libhandle *lh;
1106 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
1109 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
1110 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
1112 list_for_each_entry(lh, head, lh_hash_chain) {
1113 if (lh->lh_cookie == cookie)
1121 lnet_res_lh_initialize(struct lnet_res_container *rec,
1122 struct lnet_libhandle *lh)
1124 /* ALWAYS called with lnet_res_lock held */
1125 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
1128 lh->lh_cookie = rec->rec_lh_cookie;
1129 rec->rec_lh_cookie += 1 << ibits;
1131 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
1133 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
1137 lnet_create_array_of_queues(void)
1139 struct list_head **qs;
1140 struct list_head *q;
1143 qs = cfs_percpt_alloc(lnet_cpt_table(),
1144 sizeof(struct list_head));
1146 CERROR("Failed to allocate queues\n");
1150 cfs_percpt_for_each(q, i, qs)
1156 static int lnet_unprepare(void);
1159 lnet_prepare(lnet_pid_t requested_pid)
1161 /* Prepare to bring up the network */
1162 struct lnet_res_container **recs;
1165 if (requested_pid == LNET_PID_ANY) {
1166 /* Don't instantiate LNET just for me */
1170 LASSERT(the_lnet.ln_refcount == 0);
1172 the_lnet.ln_routing = 0;
1174 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
1175 the_lnet.ln_pid = requested_pid;
1177 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
1178 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
1179 INIT_LIST_HEAD(&the_lnet.ln_nets);
1180 INIT_LIST_HEAD(&the_lnet.ln_routers);
1181 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
1182 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
1183 INIT_LIST_HEAD(&the_lnet.ln_dc_request);
1184 INIT_LIST_HEAD(&the_lnet.ln_dc_working);
1185 INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
1186 INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
1187 INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
1188 init_waitqueue_head(&the_lnet.ln_dc_waitq);
1189 the_lnet.ln_mt_handler = NULL;
1190 init_completion(&the_lnet.ln_started);
1192 rc = lnet_slab_setup();
1196 rc = lnet_create_remote_nets_table();
1201 * NB the interface cookie in wire handles guards against delayed
1202 * replies and ACKs appearing valid after reboot.
1204 the_lnet.ln_interface_cookie = ktime_get_real_ns();
1206 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
1207 sizeof(struct lnet_counters));
1208 if (the_lnet.ln_counters == NULL) {
1209 CERROR("Failed to allocate counters for LNet\n");
1214 rc = lnet_peer_tables_create();
1218 rc = lnet_msg_containers_create();
1222 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
1223 LNET_COOKIE_TYPE_EQ);
1227 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
1233 the_lnet.ln_md_containers = recs;
1235 rc = lnet_portals_create();
1237 CERROR("Failed to create portals for LNet: %d\n", rc);
1241 the_lnet.ln_mt_zombie_rstqs = lnet_create_array_of_queues();
1242 if (!the_lnet.ln_mt_zombie_rstqs) {
1255 lnet_unprepare (void)
1257 /* NB no LNET_LOCK since this is the last reference. All LND instances
1258 * have shut down already, so it is safe to unlink and free all
1259 * descriptors, even those that appear committed to a network op (eg MD
1260 * with non-zero pending count) */
1262 lnet_fail_nid(LNET_NID_ANY, 0);
1264 LASSERT(the_lnet.ln_refcount == 0);
1265 LASSERT(list_empty(&the_lnet.ln_test_peers));
1266 LASSERT(list_empty(&the_lnet.ln_nets));
1268 if (the_lnet.ln_mt_zombie_rstqs) {
1269 lnet_clean_zombie_rstqs();
1270 the_lnet.ln_mt_zombie_rstqs = NULL;
1273 lnet_assert_handler_unused(the_lnet.ln_mt_handler);
1274 the_lnet.ln_mt_handler = NULL;
1276 lnet_portals_destroy();
1278 if (the_lnet.ln_md_containers != NULL) {
1279 lnet_res_containers_destroy(the_lnet.ln_md_containers);
1280 the_lnet.ln_md_containers = NULL;
1283 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
1285 lnet_msg_containers_destroy();
1287 lnet_rtrpools_free(0);
1289 if (the_lnet.ln_counters != NULL) {
1290 cfs_percpt_free(the_lnet.ln_counters);
1291 the_lnet.ln_counters = NULL;
1293 lnet_destroy_remote_nets_table();
1294 lnet_slab_cleanup();
1300 lnet_net2ni_locked(__u32 net_id, int cpt)
1303 struct lnet_net *net;
1305 LASSERT(cpt != LNET_LOCK_EX);
1307 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1308 if (net->net_id == net_id) {
1309 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
1319 lnet_net2ni_addref(__u32 net)
1324 ni = lnet_net2ni_locked(net, 0);
1326 lnet_ni_addref_locked(ni, 0);
1331 EXPORT_SYMBOL(lnet_net2ni_addref);
1334 lnet_get_net_locked(__u32 net_id)
1336 struct lnet_net *net;
1338 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1339 if (net->net_id == net_id)
1347 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
1352 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
1357 val = hash_long(key, LNET_CPT_BITS);
1358 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
1362 return (unsigned int)(key + val + (val >> 1)) % number;
1366 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
1368 struct lnet_net *net;
1370 /* must called with hold of lnet_net_lock */
1371 if (LNET_CPT_NUMBER == 1)
1372 return 0; /* the only one */
1375 * If NI is provided then use the CPT identified in the NI cpt
1376 * list if one exists. If one doesn't exist, then that NI is
1377 * associated with all CPTs and it follows that the net it belongs
1378 * to is implicitly associated with all CPTs, so just hash the nid
1382 if (ni->ni_cpts != NULL)
1383 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
1386 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1389 /* no NI provided so look at the net */
1390 net = lnet_get_net_locked(LNET_NIDNET(nid));
1392 if (net != NULL && net->net_cpts != NULL) {
1393 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
1396 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1400 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
1405 if (LNET_CPT_NUMBER == 1)
1406 return 0; /* the only one */
1408 cpt = lnet_net_lock_current();
1410 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
1412 lnet_net_unlock(cpt);
1416 EXPORT_SYMBOL(lnet_cpt_of_nid);
1419 lnet_islocalnet_locked(__u32 net_id)
1421 struct lnet_net *net;
1424 net = lnet_get_net_locked(net_id);
1426 local = net != NULL;
1432 lnet_islocalnet(__u32 net_id)
1437 cpt = lnet_net_lock_current();
1439 local = lnet_islocalnet_locked(net_id);
1441 lnet_net_unlock(cpt);
1447 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
1449 struct lnet_net *net;
1452 LASSERT(cpt != LNET_LOCK_EX);
1454 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1455 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1456 if (ni->ni_nid == nid)
1465 lnet_nid2ni_addref(lnet_nid_t nid)
1470 ni = lnet_nid2ni_locked(nid, 0);
1472 lnet_ni_addref_locked(ni, 0);
1477 EXPORT_SYMBOL(lnet_nid2ni_addref);
1480 lnet_islocalnid(lnet_nid_t nid)
1485 cpt = lnet_net_lock_current();
1486 ni = lnet_nid2ni_locked(nid, cpt);
1487 lnet_net_unlock(cpt);
1493 lnet_count_acceptor_nets(void)
1495 /* Return the # of NIs that need the acceptor. */
1497 struct lnet_net *net;
1500 cpt = lnet_net_lock_current();
1501 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1502 /* all socklnd type networks should have the acceptor
1504 if (net->net_lnd->lnd_accept != NULL)
1508 lnet_net_unlock(cpt);
1513 struct lnet_ping_buffer *
1514 lnet_ping_buffer_alloc(int nnis, gfp_t gfp)
1516 struct lnet_ping_buffer *pbuf;
1518 LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nnis), gfp);
1520 pbuf->pb_nnis = nnis;
1521 pbuf->pb_needs_post = false;
1522 atomic_set(&pbuf->pb_refcnt, 1);
1529 lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf)
1531 LASSERT(atomic_read(&pbuf->pb_refcnt) == 0);
1532 LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nnis));
1535 static struct lnet_ping_buffer *
1536 lnet_ping_target_create(int nnis)
1538 struct lnet_ping_buffer *pbuf;
1540 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1542 CERROR("Can't allocate ping source [%d]\n", nnis);
1546 pbuf->pb_info.pi_nnis = nnis;
1547 pbuf->pb_info.pi_pid = the_lnet.ln_pid;
1548 pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
1549 pbuf->pb_info.pi_features =
1550 LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
1556 lnet_get_net_ni_count_locked(struct lnet_net *net)
1561 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1568 lnet_get_net_ni_count_pre(struct lnet_net *net)
1573 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1580 lnet_get_ni_count(void)
1583 struct lnet_net *net;
1588 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1589 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1599 lnet_get_net_count(void)
1601 struct lnet_net *net;
1606 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1616 lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
1618 struct lnet_ni_status *stat;
1622 __swab32s(&pbuf->pb_info.pi_magic);
1623 __swab32s(&pbuf->pb_info.pi_features);
1624 __swab32s(&pbuf->pb_info.pi_pid);
1625 __swab32s(&pbuf->pb_info.pi_nnis);
1626 nnis = pbuf->pb_info.pi_nnis;
1627 if (nnis > pbuf->pb_nnis)
1628 nnis = pbuf->pb_nnis;
1629 for (i = 0; i < nnis; i++) {
1630 stat = &pbuf->pb_info.pi_ni[i];
1631 __swab64s(&stat->ns_nid);
1632 __swab32s(&stat->ns_status);
1637 lnet_ping_info_validate(struct lnet_ping_info *pinfo)
1641 if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
1643 if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
1645 /* Loopback is guaranteed to be present */
1646 if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
1648 if (LNET_PING_INFO_LONI(pinfo) != LNET_NID_LO_0)
1654 lnet_ping_target_destroy(void)
1656 struct lnet_net *net;
1659 lnet_net_lock(LNET_LOCK_EX);
1661 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1662 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1664 ni->ni_status = NULL;
1669 lnet_ping_buffer_decref(the_lnet.ln_ping_target);
1670 the_lnet.ln_ping_target = NULL;
1672 lnet_net_unlock(LNET_LOCK_EX);
1676 lnet_ping_target_event_handler(struct lnet_event *event)
1678 struct lnet_ping_buffer *pbuf = event->md_user_ptr;
1680 if (event->unlinked)
1681 lnet_ping_buffer_decref(pbuf);
1685 lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
1686 struct lnet_handle_md *ping_mdh,
1687 int ni_count, bool set_eq)
1689 struct lnet_process_id id = {
1690 .nid = LNET_NID_ANY,
1694 struct lnet_md md = { NULL };
1698 the_lnet.ln_ping_target_handler =
1699 lnet_ping_target_event_handler;
1701 *ppbuf = lnet_ping_target_create(ni_count);
1702 if (*ppbuf == NULL) {
1707 /* Ping target ME/MD */
1708 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1709 LNET_PROTO_PING_MATCHBITS, 0,
1710 LNET_UNLINK, LNET_INS_AFTER);
1713 CERROR("Can't create ping target ME: %d\n", rc);
1714 goto fail_decref_ping_buffer;
1717 /* initialize md content */
1718 md.start = &(*ppbuf)->pb_info;
1719 md.length = LNET_PING_INFO_SIZE((*ppbuf)->pb_nnis);
1720 md.threshold = LNET_MD_THRESH_INF;
1722 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1723 LNET_MD_MANAGE_REMOTE;
1724 md.handler = the_lnet.ln_ping_target_handler;
1725 md.user_ptr = *ppbuf;
1727 rc = LNetMDAttach(me, md, LNET_RETAIN, ping_mdh);
1729 CERROR("Can't attach ping target MD: %d\n", rc);
1730 goto fail_unlink_ping_me;
1732 lnet_ping_buffer_addref(*ppbuf);
1736 fail_unlink_ping_me:
1738 fail_decref_ping_buffer:
1739 LASSERT(atomic_read(&(*ppbuf)->pb_refcnt) == 1);
1740 lnet_ping_buffer_decref(*ppbuf);
1747 lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
1748 struct lnet_handle_md *ping_mdh)
1750 LNetMDUnlink(*ping_mdh);
1751 LNetInvalidateMDHandle(ping_mdh);
1753 /* NB the MD could be busy; this just starts the unlink */
1754 wait_var_event_warning(&pbuf->pb_refcnt,
1755 atomic_read(&pbuf->pb_refcnt) <= 1,
1756 "Still waiting for ping data MD to unlink\n");
1760 lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
1763 struct lnet_net *net;
1764 struct lnet_ni_status *ns;
1769 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1770 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1771 LASSERT(i < pbuf->pb_nnis);
1773 ns = &pbuf->pb_info.pi_ni[i];
1775 ns->ns_nid = ni->ni_nid;
1778 ns->ns_status = (ni->ni_status != NULL) ?
1779 ni->ni_status->ns_status :
1788 * We (ab)use the ns_status of the loopback interface to
1789 * transmit the sequence number. The first interface listed
1790 * must be the loopback interface.
1792 rc = lnet_ping_info_validate(&pbuf->pb_info);
1794 LCONSOLE_EMERG("Invalid ping target: %d\n", rc);
1797 LNET_PING_BUFFER_SEQNO(pbuf) =
1798 atomic_inc_return(&the_lnet.ln_ping_target_seqno);
1802 lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
1803 struct lnet_handle_md ping_mdh)
1805 struct lnet_ping_buffer *old_pbuf = NULL;
1806 struct lnet_handle_md old_ping_md;
1808 /* switch the NIs to point to the new ping info created */
1809 lnet_net_lock(LNET_LOCK_EX);
1811 if (!the_lnet.ln_routing)
1812 pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1813 if (!lnet_peer_discovery_disabled)
1814 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
1816 /* Ensure only known feature bits have been set. */
1817 LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
1818 LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
1820 lnet_ping_target_install_locked(pbuf);
1822 if (the_lnet.ln_ping_target) {
1823 old_pbuf = the_lnet.ln_ping_target;
1824 old_ping_md = the_lnet.ln_ping_target_md;
1826 the_lnet.ln_ping_target_md = ping_mdh;
1827 the_lnet.ln_ping_target = pbuf;
1829 lnet_net_unlock(LNET_LOCK_EX);
1832 /* unlink and free the old ping info */
1833 lnet_ping_md_unlink(old_pbuf, &old_ping_md);
1834 lnet_ping_buffer_decref(old_pbuf);
1837 lnet_push_update_to_peers(0);
1841 lnet_ping_target_fini(void)
1843 lnet_ping_md_unlink(the_lnet.ln_ping_target,
1844 &the_lnet.ln_ping_target_md);
1846 lnet_assert_handler_unused(the_lnet.ln_ping_target_handler);
1847 lnet_ping_target_destroy();
1850 /* Resize the push target. */
1851 int lnet_push_target_resize(void)
1853 struct lnet_handle_md mdh;
1854 struct lnet_handle_md old_mdh;
1855 struct lnet_ping_buffer *pbuf;
1856 struct lnet_ping_buffer *old_pbuf;
1861 nnis = the_lnet.ln_push_target_nnis;
1863 CDEBUG(D_NET, "Invalid nnis %d\n", nnis);
1867 /* NB: lnet_ping_buffer_alloc() sets pbuf refcount to 1. That ref is
1868 * dropped when we need to resize again (see "old_pbuf" below) or when
1869 * LNet is shutdown (see lnet_push_target_fini())
1871 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1873 CDEBUG(D_NET, "Can't allocate pbuf for nnis %d\n", nnis);
1877 rc = lnet_push_target_post(pbuf, &mdh);
1879 CDEBUG(D_NET, "Failed to post push target: %d\n", rc);
1880 lnet_ping_buffer_decref(pbuf);
1884 lnet_net_lock(LNET_LOCK_EX);
1885 old_pbuf = the_lnet.ln_push_target;
1886 old_mdh = the_lnet.ln_push_target_md;
1887 the_lnet.ln_push_target = pbuf;
1888 the_lnet.ln_push_target_md = mdh;
1889 lnet_net_unlock(LNET_LOCK_EX);
1892 LNetMDUnlink(old_mdh);
1893 /* Drop ref set by lnet_ping_buffer_alloc() */
1894 lnet_ping_buffer_decref(old_pbuf);
1897 /* Received another push or reply that requires a larger buffer */
1898 if (nnis < the_lnet.ln_push_target_nnis)
1901 CDEBUG(D_NET, "nnis %d success\n", nnis);
1905 int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
1906 struct lnet_handle_md *mdhp)
1908 struct lnet_process_id id = { LNET_NID_ANY, LNET_PID_ANY };
1909 struct lnet_md md = { NULL };
1913 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1914 LNET_PROTO_PING_MATCHBITS, 0,
1915 LNET_UNLINK, LNET_INS_AFTER);
1918 CERROR("Can't create push target ME: %d\n", rc);
1922 pbuf->pb_needs_post = false;
1924 /* This reference is dropped by lnet_push_target_event_handler() */
1925 lnet_ping_buffer_addref(pbuf);
1927 /* initialize md content */
1928 md.start = &pbuf->pb_info;
1929 md.length = LNET_PING_INFO_SIZE(pbuf->pb_nnis);
1932 md.options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE;
1934 md.handler = the_lnet.ln_push_target_handler;
1936 rc = LNetMDAttach(me, md, LNET_UNLINK, mdhp);
1938 CERROR("Can't attach push MD: %d\n", rc);
1940 lnet_ping_buffer_decref(pbuf);
1941 pbuf->pb_needs_post = true;
1945 CDEBUG(D_NET, "posted push target %p\n", pbuf);
1950 static void lnet_push_target_event_handler(struct lnet_event *ev)
1952 struct lnet_ping_buffer *pbuf = ev->md_user_ptr;
1954 CDEBUG(D_NET, "type %d status %d unlinked %d\n", ev->type, ev->status,
1957 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
1958 lnet_swap_pinginfo(pbuf);
1960 if (ev->type == LNET_EVENT_UNLINK) {
1961 /* Drop ref added by lnet_push_target_post() */
1962 lnet_ping_buffer_decref(pbuf);
1966 lnet_peer_push_event(ev);
1968 /* Drop ref added by lnet_push_target_post */
1969 lnet_ping_buffer_decref(pbuf);
1972 /* Initialize the push target. */
1973 static int lnet_push_target_init(void)
1977 if (the_lnet.ln_push_target)
1980 the_lnet.ln_push_target_handler =
1981 lnet_push_target_event_handler;
1983 rc = LNetSetLazyPortal(LNET_RESERVED_PORTAL);
1986 /* Start at the required minimum, we'll enlarge if required. */
1987 the_lnet.ln_push_target_nnis = LNET_INTERFACES_MIN;
1989 rc = lnet_push_target_resize();
1992 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
1993 the_lnet.ln_push_target_handler = NULL;
1999 /* Clean up the push target. */
2000 static void lnet_push_target_fini(void)
2002 if (!the_lnet.ln_push_target)
2005 /* Unlink and invalidate to prevent new references. */
2006 LNetMDUnlink(the_lnet.ln_push_target_md);
2007 LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
2009 /* Wait for the unlink to complete. */
2010 wait_var_event_warning(&the_lnet.ln_push_target->pb_refcnt,
2011 atomic_read(&the_lnet.ln_push_target->pb_refcnt) <= 1,
2012 "Still waiting for ping data MD to unlink\n");
2014 /* Drop ref set by lnet_ping_buffer_alloc() */
2015 lnet_ping_buffer_decref(the_lnet.ln_push_target);
2016 the_lnet.ln_push_target = NULL;
2017 the_lnet.ln_push_target_nnis = 0;
2019 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2020 lnet_assert_handler_unused(the_lnet.ln_push_target_handler);
2021 the_lnet.ln_push_target_handler = NULL;
2025 lnet_ni_tq_credits(struct lnet_ni *ni)
2029 LASSERT(ni->ni_ncpts >= 1);
2031 if (ni->ni_ncpts == 1)
2032 return ni->ni_net->net_tunables.lct_max_tx_credits;
2034 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
2035 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
2036 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
2042 lnet_ni_unlink_locked(struct lnet_ni *ni)
2044 /* move it to zombie list and nobody can find it anymore */
2045 LASSERT(!list_empty(&ni->ni_netlist));
2046 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
2047 lnet_ni_decref_locked(ni, 0);
2051 lnet_clear_zombies_nis_locked(struct lnet_net *net)
2056 struct list_head *zombie_list = &net->net_ni_zombie;
2059 * Now wait for the NIs I just nuked to show up on the zombie
2060 * list and shut them down in guaranteed thread context
2063 while (!list_empty(zombie_list)) {
2067 ni = list_entry(zombie_list->next,
2068 struct lnet_ni, ni_netlist);
2069 list_del_init(&ni->ni_netlist);
2070 /* the ni should be in deleting state. If it's not it's
2072 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
2073 cfs_percpt_for_each(ref, j, ni->ni_refs) {
2076 /* still busy, add it back to zombie list */
2077 list_add(&ni->ni_netlist, zombie_list);
2081 if (!list_empty(&ni->ni_netlist)) {
2082 lnet_net_unlock(LNET_LOCK_EX);
2084 if ((i & (-i)) == i) {
2086 "Waiting for zombie LNI %s\n",
2087 libcfs_nid2str(ni->ni_nid));
2089 schedule_timeout_uninterruptible(cfs_time_seconds(1));
2090 lnet_net_lock(LNET_LOCK_EX);
2094 lnet_net_unlock(LNET_LOCK_EX);
2096 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
2098 LASSERT(!in_interrupt());
2099 /* Holding the mutex makes it safe for lnd_shutdown
2100 * to call module_put(). Module unload cannot finish
2101 * until lnet_unregister_lnd() completes, and that
2102 * requires the mutex.
2104 mutex_lock(&the_lnet.ln_lnd_mutex);
2105 (net->net_lnd->lnd_shutdown)(ni);
2106 mutex_unlock(&the_lnet.ln_lnd_mutex);
2109 CDEBUG(D_LNI, "Removed LNI %s\n",
2110 libcfs_nid2str(ni->ni_nid));
2114 lnet_net_lock(LNET_LOCK_EX);
2118 /* shutdown down the NI and release refcount */
2120 lnet_shutdown_lndni(struct lnet_ni *ni)
2123 struct lnet_net *net = ni->ni_net;
2125 lnet_net_lock(LNET_LOCK_EX);
2127 ni->ni_state = LNET_NI_STATE_DELETING;
2129 lnet_ni_unlink_locked(ni);
2130 lnet_incr_dlc_seq();
2131 lnet_net_unlock(LNET_LOCK_EX);
2133 /* clear messages for this NI on the lazy portal */
2134 for (i = 0; i < the_lnet.ln_nportals; i++)
2135 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
2137 lnet_net_lock(LNET_LOCK_EX);
2138 lnet_clear_zombies_nis_locked(net);
2139 lnet_net_unlock(LNET_LOCK_EX);
2143 lnet_shutdown_lndnet(struct lnet_net *net)
2147 lnet_net_lock(LNET_LOCK_EX);
2149 list_del_init(&net->net_list);
2151 while (!list_empty(&net->net_ni_list)) {
2152 ni = list_entry(net->net_ni_list.next,
2153 struct lnet_ni, ni_netlist);
2154 lnet_net_unlock(LNET_LOCK_EX);
2155 lnet_shutdown_lndni(ni);
2156 lnet_net_lock(LNET_LOCK_EX);
2159 lnet_net_unlock(LNET_LOCK_EX);
2161 /* Do peer table cleanup for this net */
2162 lnet_peer_tables_cleanup(net);
2168 lnet_shutdown_lndnets(void)
2170 struct lnet_net *net;
2172 struct lnet_msg *msg, *tmp;
2174 /* NB called holding the global mutex */
2176 /* All quiet on the API front */
2177 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
2178 LASSERT(the_lnet.ln_refcount == 0);
2180 lnet_net_lock(LNET_LOCK_EX);
2181 the_lnet.ln_state = LNET_STATE_STOPPING;
2184 * move the nets to the zombie list to avoid them being
2185 * picked up for new work. LONET is also included in the
2186 * Nets that will be moved to the zombie list
2188 list_splice_init(&the_lnet.ln_nets, &the_lnet.ln_net_zombie);
2190 /* Drop the cached loopback Net. */
2191 if (the_lnet.ln_loni != NULL) {
2192 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
2193 the_lnet.ln_loni = NULL;
2195 lnet_net_unlock(LNET_LOCK_EX);
2197 /* iterate through the net zombie list and delete each net */
2198 while (!list_empty(&the_lnet.ln_net_zombie)) {
2199 net = list_entry(the_lnet.ln_net_zombie.next,
2200 struct lnet_net, net_list);
2201 lnet_shutdown_lndnet(net);
2204 spin_lock(&the_lnet.ln_msg_resend_lock);
2205 list_splice(&the_lnet.ln_msg_resend, &resend);
2206 spin_unlock(&the_lnet.ln_msg_resend_lock);
2208 list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
2209 list_del_init(&msg->msg_list);
2210 msg->msg_no_resend = true;
2211 lnet_finalize(msg, -ECANCELED);
2214 lnet_net_lock(LNET_LOCK_EX);
2215 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
2216 lnet_net_unlock(LNET_LOCK_EX);
2220 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
2223 struct lnet_tx_queue *tq;
2225 struct lnet_net *net = ni->ni_net;
2227 mutex_lock(&the_lnet.ln_lnd_mutex);
2230 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
2231 ni->ni_lnd_tunables_set = true;
2234 rc = (net->net_lnd->lnd_startup)(ni);
2236 mutex_unlock(&the_lnet.ln_lnd_mutex);
2239 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
2240 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
2245 ni->ni_state = LNET_NI_STATE_ACTIVE;
2248 /* We keep a reference on the loopback net through the loopback NI */
2249 if (net->net_lnd->lnd_type == LOLND) {
2251 LASSERT(the_lnet.ln_loni == NULL);
2252 the_lnet.ln_loni = ni;
2253 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
2254 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
2255 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
2256 ni->ni_net->net_tunables.lct_peer_timeout = 0;
2260 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
2261 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
2262 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
2263 libcfs_lnd2str(net->net_lnd->lnd_type),
2264 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
2266 /* shutdown the NI since if we get here then it must've already
2269 lnet_shutdown_lndni(ni);
2273 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
2274 tq->tq_credits_min =
2275 tq->tq_credits_max =
2276 tq->tq_credits = lnet_ni_tq_credits(ni);
2279 atomic_set(&ni->ni_tx_credits,
2280 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
2281 atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
2283 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
2284 libcfs_nid2str(ni->ni_nid),
2285 ni->ni_net->net_tunables.lct_peer_tx_credits,
2286 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
2287 ni->ni_net->net_tunables.lct_peer_rtr_credits,
2288 ni->ni_net->net_tunables.lct_peer_timeout);
2297 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
2300 struct lnet_net *net_l = NULL;
2301 LIST_HEAD(local_ni_list);
2305 const struct lnet_lnd *lnd;
2307 net->net_tunables.lct_peer_timeout;
2309 net->net_tunables.lct_max_tx_credits;
2310 int peerrtrcredits =
2311 net->net_tunables.lct_peer_rtr_credits;
2314 * make sure that this net is unique. If it isn't then
2315 * we are adding interfaces to an already existing network, and
2316 * 'net' is just a convenient way to pass in the list.
2317 * if it is unique we need to find the LND and load it if
2320 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
2321 lnd_type = LNET_NETTYP(net->net_id);
2323 mutex_lock(&the_lnet.ln_lnd_mutex);
2324 lnd = lnet_find_lnd_by_type(lnd_type);
2327 mutex_unlock(&the_lnet.ln_lnd_mutex);
2328 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
2329 mutex_lock(&the_lnet.ln_lnd_mutex);
2331 lnd = lnet_find_lnd_by_type(lnd_type);
2333 mutex_unlock(&the_lnet.ln_lnd_mutex);
2334 CERROR("Can't load LND %s, module %s, rc=%d\n",
2335 libcfs_lnd2str(lnd_type),
2336 libcfs_lnd2modname(lnd_type), rc);
2337 #ifndef HAVE_MODULE_LOADING_SUPPORT
2338 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
2339 "compiled with kernel module "
2340 "loading support.");
2349 mutex_unlock(&the_lnet.ln_lnd_mutex);
2355 * net_l: if the network being added is unique then net_l
2356 * will point to that network
2357 * if the network being added is not unique then
2358 * net_l points to the existing network.
2360 * When we enter the loop below, we'll pick NIs off he
2361 * network beign added and start them up, then add them to
2362 * a local ni list. Once we've successfully started all
2363 * the NIs then we join the local NI list (of started up
2364 * networks) with the net_l->net_ni_list, which should
2365 * point to the correct network to add the new ni list to
2367 * If any of the new NIs fail to start up, then we want to
2368 * iterate through the local ni list, which should include
2369 * any NIs which were successfully started up, and shut
2372 * After than we want to delete the network being added,
2373 * to avoid a memory leak.
2377 * When a network uses TCP bonding then all its interfaces
2378 * must be specified when the network is first defined: the
2379 * TCP bonding code doesn't allow for interfaces to be added
2382 if (net_l != net && net_l != NULL && use_tcp_bonding &&
2383 LNET_NETTYP(net_l->net_id) == SOCKLND) {
2388 while (!list_empty(&net->net_ni_added)) {
2389 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
2391 list_del_init(&ni->ni_netlist);
2393 /* make sure that the the NI we're about to start
2394 * up is actually unique. if it's not fail. */
2395 if (!lnet_ni_unique_net(&net_l->net_ni_list,
2396 ni->ni_interfaces[0])) {
2401 /* adjust the pointer the parent network, just in case it
2402 * the net is a duplicate */
2405 rc = lnet_startup_lndni(ni, tun);
2411 list_add_tail(&ni->ni_netlist, &local_ni_list);
2416 lnet_net_lock(LNET_LOCK_EX);
2417 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
2418 lnet_incr_dlc_seq();
2419 lnet_net_unlock(LNET_LOCK_EX);
2421 /* if the network is not unique then we don't want to keep
2422 * it around after we're done. Free it. Otherwise add that
2423 * net to the global the_lnet.ln_nets */
2424 if (net_l != net && net_l != NULL) {
2426 * TODO - note. currently the tunables can not be updated
2432 * restore tunables after it has been overwitten by the
2435 if (peer_timeout != -1)
2436 net->net_tunables.lct_peer_timeout = peer_timeout;
2437 if (maxtxcredits != -1)
2438 net->net_tunables.lct_max_tx_credits = maxtxcredits;
2439 if (peerrtrcredits != -1)
2440 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
2442 lnet_net_lock(LNET_LOCK_EX);
2443 list_add_tail(&net->net_list, &the_lnet.ln_nets);
2444 lnet_net_unlock(LNET_LOCK_EX);
2447 /* update net count */
2448 lnet_current_net_count = lnet_get_net_count();
2454 * shutdown the new NIs that are being started up
2455 * free the NET being started
2457 while (!list_empty(&local_ni_list)) {
2458 ni = list_entry(local_ni_list.next, struct lnet_ni,
2461 lnet_shutdown_lndni(ni);
2471 lnet_startup_lndnets(struct list_head *netlist)
2473 struct lnet_net *net;
2478 * Change to running state before bringing up the LNDs. This
2479 * allows lnet_shutdown_lndnets() to assert that we've passed
2482 lnet_net_lock(LNET_LOCK_EX);
2483 the_lnet.ln_state = LNET_STATE_RUNNING;
2484 lnet_net_unlock(LNET_LOCK_EX);
2486 while (!list_empty(netlist)) {
2487 net = list_entry(netlist->next, struct lnet_net, net_list);
2488 list_del_init(&net->net_list);
2490 rc = lnet_startup_lndnet(net, NULL);
2500 lnet_shutdown_lndnets();
2506 * Initialize LNet library.
2508 * Automatically called at module loading time. Caller has to call
2509 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
2510 * latter returned 0. It must be called exactly once.
2512 * \retval 0 on success
2513 * \retval -ve on failures.
2515 int lnet_lib_init(void)
2519 lnet_assert_wire_constants();
2521 /* refer to global cfs_cpt_table for now */
2522 the_lnet.ln_cpt_table = cfs_cpt_tab;
2523 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_tab);
2525 LASSERT(the_lnet.ln_cpt_number > 0);
2526 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
2527 /* we are under risk of consuming all lh_cookie */
2528 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
2529 "please change setting of CPT-table and retry\n",
2530 the_lnet.ln_cpt_number, LNET_CPT_MAX);
2534 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
2535 the_lnet.ln_cpt_bits++;
2537 rc = lnet_create_locks();
2539 CERROR("Can't create LNet global locks: %d\n", rc);
2543 the_lnet.ln_refcount = 0;
2544 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
2545 INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
2547 /* The hash table size is the number of bits it takes to express the set
2548 * ln_num_routes, minus 1 (better to under estimate than over so we
2549 * don't waste memory). */
2550 if (rnet_htable_size <= 0)
2551 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
2552 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
2553 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
2554 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
2555 order_base_2(rnet_htable_size) - 1);
2557 /* All LNDs apart from the LOLND are in separate modules. They
2558 * register themselves when their module loads, and unregister
2559 * themselves when their module is unloaded. */
2560 lnet_register_lnd(&the_lolnd);
2565 * Finalize LNet library.
2567 * \pre lnet_lib_init() called with success.
2568 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
2570 * As this happens at module-unload, all lnds must already be unloaded,
2571 * so they must already be unregistered.
2573 void lnet_lib_exit(void)
2577 LASSERT(the_lnet.ln_refcount == 0);
2578 lnet_unregister_lnd(&the_lolnd);
2579 for (i = 0; i < NUM_LNDS; i++)
2580 LASSERT(!the_lnet.ln_lnds[i]);
2581 lnet_destroy_locks();
2585 * Set LNet PID and start LNet interfaces, routing, and forwarding.
2587 * Users must call this function at least once before any other functions.
2588 * For each successful call there must be a corresponding call to
2589 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
2592 * The PID used by LNet may be different from the one requested.
2595 * \param requested_pid PID requested by the caller.
2597 * \return >= 0 on success, and < 0 error code on failures.
2600 LNetNIInit(lnet_pid_t requested_pid)
2602 int im_a_router = 0;
2605 struct lnet_ping_buffer *pbuf;
2606 struct lnet_handle_md ping_mdh;
2607 LIST_HEAD(net_head);
2608 struct lnet_net *net;
2610 mutex_lock(&the_lnet.ln_api_mutex);
2612 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
2614 if (the_lnet.ln_refcount > 0) {
2615 rc = the_lnet.ln_refcount++;
2616 mutex_unlock(&the_lnet.ln_api_mutex);
2620 rc = lnet_prepare(requested_pid);
2622 mutex_unlock(&the_lnet.ln_api_mutex);
2626 /* create a network for Loopback network */
2627 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
2630 goto err_empty_list;
2633 /* Add in the loopback NI */
2634 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
2636 goto err_empty_list;
2639 /* If LNet is being initialized via DLC it is possible
2640 * that the user requests not to load module parameters (ones which
2641 * are supported by DLC) on initialization. Therefore, make sure not
2642 * to load networks, routes and forwarding from module parameters
2643 * in this case. On cleanup in case of failure only clean up
2644 * routes if it has been loaded */
2645 if (!the_lnet.ln_nis_from_mod_params) {
2646 rc = lnet_parse_networks(&net_head, lnet_get_networks(),
2649 goto err_empty_list;
2652 ni_count = lnet_startup_lndnets(&net_head);
2655 goto err_empty_list;
2658 if (!the_lnet.ln_nis_from_mod_params) {
2659 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
2661 goto err_shutdown_lndnis;
2663 rc = lnet_rtrpools_alloc(im_a_router);
2665 goto err_destroy_routes;
2668 rc = lnet_acceptor_start();
2670 goto err_destroy_routes;
2672 the_lnet.ln_refcount = 1;
2673 /* Now I may use my own API functions... */
2675 rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_count, true);
2677 goto err_acceptor_stop;
2679 lnet_ping_target_update(pbuf, ping_mdh);
2681 the_lnet.ln_mt_handler = lnet_mt_event_handler;
2683 rc = lnet_push_target_init();
2687 rc = lnet_peer_discovery_start();
2689 goto err_destroy_push_target;
2691 rc = lnet_monitor_thr_start();
2693 goto err_stop_discovery_thr;
2696 lnet_router_debugfs_init();
2698 mutex_unlock(&the_lnet.ln_api_mutex);
2700 complete_all(&the_lnet.ln_started);
2702 /* wait for all routers to start */
2703 lnet_wait_router_start();
2707 err_stop_discovery_thr:
2708 lnet_peer_discovery_stop();
2709 err_destroy_push_target:
2710 lnet_push_target_fini();
2712 lnet_ping_target_fini();
2714 the_lnet.ln_refcount = 0;
2715 lnet_acceptor_stop();
2717 if (!the_lnet.ln_nis_from_mod_params)
2718 lnet_destroy_routes();
2719 err_shutdown_lndnis:
2720 lnet_shutdown_lndnets();
2724 mutex_unlock(&the_lnet.ln_api_mutex);
2725 while (!list_empty(&net_head)) {
2726 struct lnet_net *net;
2728 net = list_entry(net_head.next, struct lnet_net, net_list);
2729 list_del_init(&net->net_list);
2734 EXPORT_SYMBOL(LNetNIInit);
2737 * Stop LNet interfaces, routing, and forwarding.
2739 * Users must call this function once for each successful call to LNetNIInit().
2740 * Once the LNetNIFini() operation has been started, the results of pending
2741 * API operations are undefined.
2743 * \return always 0 for current implementation.
2748 mutex_lock(&the_lnet.ln_api_mutex);
2750 LASSERT(the_lnet.ln_refcount > 0);
2752 if (the_lnet.ln_refcount != 1) {
2753 the_lnet.ln_refcount--;
2755 LASSERT(!the_lnet.ln_niinit_self);
2759 lnet_router_debugfs_fini();
2760 lnet_monitor_thr_stop();
2761 lnet_peer_discovery_stop();
2762 lnet_push_target_fini();
2763 lnet_ping_target_fini();
2765 /* Teardown fns that use my own API functions BEFORE here */
2766 the_lnet.ln_refcount = 0;
2768 lnet_acceptor_stop();
2769 lnet_destroy_routes();
2770 lnet_shutdown_lndnets();
2774 mutex_unlock(&the_lnet.ln_api_mutex);
2777 EXPORT_SYMBOL(LNetNIFini);
2780 * Grabs the ni data from the ni structure and fills the out
2783 * \param[in] ni network interface structure
2784 * \param[out] cfg_ni NI config information
2785 * \param[out] tun network and LND tunables
2788 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
2789 struct lnet_ioctl_config_lnd_tunables *tun,
2790 struct lnet_ioctl_element_stats *stats,
2793 size_t min_size = 0;
2796 if (!ni || !cfg_ni || !tun)
2799 if (ni->ni_interfaces[0] != NULL) {
2800 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2801 if (ni->ni_interfaces[i] != NULL) {
2802 strncpy(cfg_ni->lic_ni_intf[i],
2803 ni->ni_interfaces[i],
2804 sizeof(cfg_ni->lic_ni_intf[i]));
2809 cfg_ni->lic_nid = ni->ni_nid;
2810 if (ni->ni_nid == LNET_NID_LO_0)
2811 cfg_ni->lic_status = LNET_NI_STATUS_UP;
2813 cfg_ni->lic_status = ni->ni_status->ns_status;
2814 cfg_ni->lic_tcp_bonding = use_tcp_bonding;
2815 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
2817 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
2820 stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
2821 LNET_STATS_TYPE_SEND);
2822 stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
2823 LNET_STATS_TYPE_RECV);
2824 stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
2825 LNET_STATS_TYPE_DROP);
2829 * tun->lt_tun will always be present, but in order to be
2830 * backwards compatible, we need to deal with the cases when
2831 * tun->lt_tun is smaller than what the kernel has, because it
2832 * comes from an older version of a userspace program, then we'll
2833 * need to copy as much information as we have available space.
2835 min_size = tun_size - sizeof(tun->lt_cmn);
2836 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
2838 /* copy over the cpts */
2839 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
2840 ni->ni_cpts == NULL) {
2841 for (i = 0; i < ni->ni_ncpts; i++)
2842 cfg_ni->lic_cpts[i] = i;
2845 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
2846 i < LNET_MAX_SHOW_NUM_CPT;
2848 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
2850 cfg_ni->lic_ncpts = ni->ni_ncpts;
2854 * NOTE: This is a legacy function left in the code to be backwards
2855 * compatible with older userspace programs. It should eventually be
2858 * Grabs the ni data from the ni structure and fills the out
2861 * \param[in] ni network interface structure
2862 * \param[out] config config information
2865 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
2866 struct lnet_ioctl_config_data *config)
2868 struct lnet_ioctl_net_config *net_config;
2869 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
2870 size_t min_size, tunable_size = 0;
2876 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
2880 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
2881 ARRAY_SIZE(net_config->ni_interfaces));
2883 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2884 if (!ni->ni_interfaces[i])
2887 strncpy(net_config->ni_interfaces[i],
2888 ni->ni_interfaces[i],
2889 sizeof(net_config->ni_interfaces[i]));
2892 config->cfg_nid = ni->ni_nid;
2893 config->cfg_config_u.cfg_net.net_peer_timeout =
2894 ni->ni_net->net_tunables.lct_peer_timeout;
2895 config->cfg_config_u.cfg_net.net_max_tx_credits =
2896 ni->ni_net->net_tunables.lct_max_tx_credits;
2897 config->cfg_config_u.cfg_net.net_peer_tx_credits =
2898 ni->ni_net->net_tunables.lct_peer_tx_credits;
2899 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
2900 ni->ni_net->net_tunables.lct_peer_rtr_credits;
2902 if (ni->ni_nid == LNET_NID_LO_0)
2903 net_config->ni_status = LNET_NI_STATUS_UP;
2905 net_config->ni_status = ni->ni_status->ns_status;
2908 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
2910 for (i = 0; i < num_cpts; i++)
2911 net_config->ni_cpts[i] = ni->ni_cpts[i];
2913 config->cfg_ncpts = num_cpts;
2917 * See if user land tools sent in a newer and larger version
2918 * of struct lnet_tunables than what the kernel uses.
2920 min_size = sizeof(*config) + sizeof(*net_config);
2922 if (config->cfg_hdr.ioc_len > min_size)
2923 tunable_size = config->cfg_hdr.ioc_len - min_size;
2925 /* Don't copy too much data to user space */
2926 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
2927 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
2929 if (lnd_cfg && min_size) {
2930 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
2931 config->cfg_config_u.cfg_net.net_interface_count = 1;
2933 /* Tell user land that kernel side has less data */
2934 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
2935 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
2936 config->cfg_hdr.ioc_len -= min_size;
2942 lnet_get_ni_idx_locked(int idx)
2945 struct lnet_net *net;
2947 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
2948 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
2958 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
2961 struct lnet_net *net = mynet;
2964 * It is possible that the net has been cleaned out while there is
2965 * a message being sent. This function accessed the net without
2966 * checking if the list is empty
2970 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
2972 if (list_empty(&net->net_ni_list))
2974 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2980 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
2981 /* if you reached the end of the ni list and the net is
2982 * specified, then there are no more nis in that net */
2986 /* we reached the end of this net ni list. move to the
2988 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
2989 /* no more nets and no more NIs. */
2992 /* get the next net */
2993 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
2995 if (list_empty(&net->net_ni_list))
2997 /* get the ni on it */
2998 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3004 if (list_empty(&prev->ni_netlist))
3007 /* there are more nis left */
3008 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
3014 lnet_get_net_config(struct lnet_ioctl_config_data *config)
3019 int idx = config->cfg_count;
3021 cpt = lnet_net_lock_current();
3023 ni = lnet_get_ni_idx_locked(idx);
3028 lnet_fill_ni_info_legacy(ni, config);
3032 lnet_net_unlock(cpt);
3037 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
3038 struct lnet_ioctl_config_lnd_tunables *tun,
3039 struct lnet_ioctl_element_stats *stats,
3046 if (!cfg_ni || !tun || !stats)
3049 cpt = lnet_net_lock_current();
3051 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
3056 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
3060 lnet_net_unlock(cpt);
3064 int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
3073 cpt = lnet_net_lock_current();
3075 ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
3078 lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
3082 lnet_net_unlock(cpt);
3087 static int lnet_add_net_common(struct lnet_net *net,
3088 struct lnet_ioctl_config_lnd_tunables *tun)
3091 struct lnet_ping_buffer *pbuf;
3092 struct lnet_handle_md ping_mdh;
3094 struct lnet_remotenet *rnet;
3097 lnet_net_lock(LNET_LOCK_EX);
3098 rnet = lnet_find_rnet_locked(net->net_id);
3099 lnet_net_unlock(LNET_LOCK_EX);
3101 * make sure that the net added doesn't invalidate the current
3102 * configuration LNet is keeping
3105 CERROR("Adding net %s will invalidate routing configuration\n",
3106 libcfs_net2str(net->net_id));
3112 * make sure you calculate the correct number of slots in the ping
3113 * buffer. Since the ping info is a flattened list of all the NIs,
3114 * we should allocate enough slots to accomodate the number of NIs
3115 * which will be added.
3117 * since ni hasn't been configured yet, use
3118 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
3120 net_ni_count = lnet_get_net_ni_count_pre(net);
3122 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3123 net_ni_count + lnet_get_ni_count(),
3131 memcpy(&net->net_tunables,
3132 &tun->lt_cmn, sizeof(net->net_tunables));
3134 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
3136 net_id = net->net_id;
3138 rc = lnet_startup_lndnet(net,
3139 (tun) ? &tun->lt_tun : NULL);
3143 lnet_net_lock(LNET_LOCK_EX);
3144 net = lnet_get_net_locked(net_id);
3145 lnet_net_unlock(LNET_LOCK_EX);
3150 * Start the acceptor thread if this is the first network
3151 * being added that requires the thread.
3153 if (net->net_lnd->lnd_accept) {
3154 rc = lnet_acceptor_start();
3156 /* shutdown the net that we just started */
3157 CERROR("Failed to start up acceptor thread\n");
3158 lnet_shutdown_lndnet(net);
3163 lnet_net_lock(LNET_LOCK_EX);
3164 lnet_peer_net_added(net);
3165 lnet_net_unlock(LNET_LOCK_EX);
3167 lnet_ping_target_update(pbuf, ping_mdh);
3172 lnet_ping_md_unlink(pbuf, &ping_mdh);
3173 lnet_ping_buffer_decref(pbuf);
3177 static int lnet_handle_legacy_ip2nets(char *ip2nets,
3178 struct lnet_ioctl_config_lnd_tunables *tun)
3180 struct lnet_net *net;
3183 LIST_HEAD(net_head);
3185 rc = lnet_parse_ip2nets(&nets, ip2nets);
3189 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
3193 mutex_lock(&the_lnet.ln_api_mutex);
3194 while (!list_empty(&net_head)) {
3195 net = list_entry(net_head.next, struct lnet_net, net_list);
3196 list_del_init(&net->net_list);
3197 rc = lnet_add_net_common(net, tun);
3203 mutex_unlock(&the_lnet.ln_api_mutex);
3205 while (!list_empty(&net_head)) {
3206 net = list_entry(net_head.next, struct lnet_net, net_list);
3207 list_del_init(&net->net_list);
3213 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
3215 struct lnet_net *net;
3217 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3219 __u32 net_id, lnd_type;
3221 /* get the tunables if they are available */
3222 if (conf->lic_cfg_hdr.ioc_len >=
3223 sizeof(*conf) + sizeof(*tun))
3224 tun = (struct lnet_ioctl_config_lnd_tunables *)
3227 /* handle legacy ip2nets from DLC */
3228 if (conf->lic_legacy_ip2nets[0] != '\0')
3229 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
3232 net_id = LNET_NIDNET(conf->lic_nid);
3233 lnd_type = LNET_NETTYP(net_id);
3235 if (!libcfs_isknown_lnd(lnd_type)) {
3236 CERROR("No valid net and lnd information provided\n");
3240 net = lnet_net_alloc(net_id, NULL);
3244 for (i = 0; i < conf->lic_ncpts; i++) {
3245 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
3249 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
3250 conf->lic_ni_intf[0]);
3254 mutex_lock(&the_lnet.ln_api_mutex);
3256 rc = lnet_add_net_common(net, tun);
3258 mutex_unlock(&the_lnet.ln_api_mutex);
3263 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
3265 struct lnet_net *net;
3267 __u32 net_id = LNET_NIDNET(conf->lic_nid);
3268 struct lnet_ping_buffer *pbuf;
3269 struct lnet_handle_md ping_mdh;
3274 /* don't allow userspace to shutdown the LOLND */
3275 if (LNET_NETTYP(net_id) == LOLND)
3278 mutex_lock(&the_lnet.ln_api_mutex);
3282 net = lnet_get_net_locked(net_id);
3284 CERROR("net %s not found\n",
3285 libcfs_net2str(net_id));
3290 addr = LNET_NIDADDR(conf->lic_nid);
3292 /* remove the entire net */
3293 net_count = lnet_get_net_ni_count_locked(net);
3297 /* create and link a new ping info, before removing the old one */
3298 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3299 lnet_get_ni_count() - net_count,
3302 goto unlock_api_mutex;
3304 lnet_shutdown_lndnet(net);
3306 lnet_acceptor_stop();
3308 lnet_ping_target_update(pbuf, ping_mdh);
3310 goto unlock_api_mutex;
3313 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
3315 CERROR("nid %s not found\n",
3316 libcfs_nid2str(conf->lic_nid));
3321 net_count = lnet_get_net_ni_count_locked(net);
3325 /* create and link a new ping info, before removing the old one */
3326 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3327 lnet_get_ni_count() - 1, false);
3329 goto unlock_api_mutex;
3331 lnet_shutdown_lndni(ni);
3333 lnet_acceptor_stop();
3335 lnet_ping_target_update(pbuf, ping_mdh);
3337 /* check if the net is empty and remove it if it is */
3339 lnet_shutdown_lndnet(net);
3341 goto unlock_api_mutex;
3346 mutex_unlock(&the_lnet.ln_api_mutex);
3352 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
3353 * They are only expected to be called for unique networks.
3354 * That can be as a result of older DLC library
3355 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
3358 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
3360 struct lnet_net *net;
3361 LIST_HEAD(net_head);
3363 struct lnet_ioctl_config_lnd_tunables tun;
3364 const char *nets = conf->cfg_config_u.cfg_net.net_intf;
3366 /* Create a net/ni structures for the network string */
3367 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
3369 return rc == 0 ? -EINVAL : rc;
3371 mutex_lock(&the_lnet.ln_api_mutex);
3374 rc = -EINVAL; /* only add one network per call */
3375 goto out_unlock_clean;
3378 net = list_entry(net_head.next, struct lnet_net, net_list);
3379 list_del_init(&net->net_list);
3381 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
3383 memset(&tun, 0, sizeof(tun));
3385 tun.lt_cmn.lct_peer_timeout =
3386 conf->cfg_config_u.cfg_net.net_peer_timeout;
3387 tun.lt_cmn.lct_peer_tx_credits =
3388 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
3389 tun.lt_cmn.lct_peer_rtr_credits =
3390 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
3391 tun.lt_cmn.lct_max_tx_credits =
3392 conf->cfg_config_u.cfg_net.net_max_tx_credits;
3394 rc = lnet_add_net_common(net, &tun);
3397 mutex_unlock(&the_lnet.ln_api_mutex);
3398 while (!list_empty(&net_head)) {
3399 /* net_head list is empty in success case */
3400 net = list_entry(net_head.next, struct lnet_net, net_list);
3401 list_del_init(&net->net_list);
3408 lnet_dyn_del_net(__u32 net_id)
3410 struct lnet_net *net;
3411 struct lnet_ping_buffer *pbuf;
3412 struct lnet_handle_md ping_mdh;
3416 /* don't allow userspace to shutdown the LOLND */
3417 if (LNET_NETTYP(net_id) == LOLND)
3420 mutex_lock(&the_lnet.ln_api_mutex);
3424 net = lnet_get_net_locked(net_id);
3431 net_ni_count = lnet_get_net_ni_count_locked(net);
3435 /* create and link a new ping info, before removing the old one */
3436 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3437 lnet_get_ni_count() - net_ni_count, false);
3441 lnet_shutdown_lndnet(net);
3443 lnet_acceptor_stop();
3445 lnet_ping_target_update(pbuf, ping_mdh);
3448 mutex_unlock(&the_lnet.ln_api_mutex);
3453 void lnet_incr_dlc_seq(void)
3455 atomic_inc(&lnet_dlc_seq_no);
3458 __u32 lnet_get_dlc_seq_locked(void)
3460 return atomic_read(&lnet_dlc_seq_no);
3464 lnet_ni_set_healthv(lnet_nid_t nid, int value, bool all)
3466 struct lnet_net *net;
3469 lnet_net_lock(LNET_LOCK_EX);
3470 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3471 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3472 if (ni->ni_nid == nid || all) {
3473 atomic_set(&ni->ni_healthv, value);
3474 if (list_empty(&ni->ni_recovery) &&
3475 value < LNET_MAX_HEALTH_VALUE) {
3476 CERROR("manually adding local NI %s to recovery\n",
3477 libcfs_nid2str(ni->ni_nid));
3478 list_add_tail(&ni->ni_recovery,
3479 &the_lnet.ln_mt_localNIRecovq);
3480 lnet_ni_addref_locked(ni, 0);
3483 lnet_net_unlock(LNET_LOCK_EX);
3489 lnet_net_unlock(LNET_LOCK_EX);
3493 lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
3497 lnet_nid_t nid = stats->hlni_nid;
3499 cpt = lnet_net_lock_current();
3500 ni = lnet_nid2ni_locked(nid, cpt);
3507 stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
3508 stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
3509 stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
3510 stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
3511 stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
3512 stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
3513 stats->hlni_health_value = atomic_read(&ni->ni_healthv);
3516 lnet_net_unlock(cpt);
3522 lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3527 lnet_net_lock(LNET_LOCK_EX);
3528 list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
3529 list->rlst_nid_array[i] = ni->ni_nid;
3531 if (i >= LNET_MAX_SHOW_NUM_NID)
3534 lnet_net_unlock(LNET_LOCK_EX);
3535 list->rlst_num_nids = i;
3541 lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3543 struct lnet_peer_ni *lpni;
3546 lnet_net_lock(LNET_LOCK_EX);
3547 list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
3548 list->rlst_nid_array[i] = lpni->lpni_nid;
3550 if (i >= LNET_MAX_SHOW_NUM_NID)
3553 lnet_net_unlock(LNET_LOCK_EX);
3554 list->rlst_num_nids = i;
3560 * LNet ioctl handler.
3564 LNetCtl(unsigned int cmd, void *arg)
3566 struct libcfs_ioctl_data *data = arg;
3567 struct lnet_ioctl_config_data *config;
3568 struct lnet_process_id id = {0};
3572 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
3573 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
3576 case IOC_LIBCFS_GET_NI:
3577 rc = LNetGetId(data->ioc_count, &id);
3578 data->ioc_nid = id.nid;
3581 case IOC_LIBCFS_FAIL_NID:
3582 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
3584 case IOC_LIBCFS_ADD_ROUTE: {
3585 /* default router sensitivity to 1 */
3586 unsigned int sensitivity = 1;
3589 if (config->cfg_hdr.ioc_len < sizeof(*config))
3592 if (config->cfg_config_u.cfg_route.rtr_sensitivity) {
3594 config->cfg_config_u.cfg_route.rtr_sensitivity;
3597 mutex_lock(&the_lnet.ln_api_mutex);
3598 rc = lnet_add_route(config->cfg_net,
3599 config->cfg_config_u.cfg_route.rtr_hop,
3601 config->cfg_config_u.cfg_route.
3602 rtr_priority, sensitivity);
3603 mutex_unlock(&the_lnet.ln_api_mutex);
3607 case IOC_LIBCFS_DEL_ROUTE:
3610 if (config->cfg_hdr.ioc_len < sizeof(*config))
3613 mutex_lock(&the_lnet.ln_api_mutex);
3614 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
3615 mutex_unlock(&the_lnet.ln_api_mutex);
3618 case IOC_LIBCFS_GET_ROUTE:
3621 if (config->cfg_hdr.ioc_len < sizeof(*config))
3624 mutex_lock(&the_lnet.ln_api_mutex);
3625 rc = lnet_get_route(config->cfg_count,
3627 &config->cfg_config_u.cfg_route.rtr_hop,
3629 &config->cfg_config_u.cfg_route.rtr_flags,
3630 &config->cfg_config_u.cfg_route.
3632 &config->cfg_config_u.cfg_route.
3634 mutex_unlock(&the_lnet.ln_api_mutex);
3637 case IOC_LIBCFS_GET_LOCAL_NI: {
3638 struct lnet_ioctl_config_ni *cfg_ni;
3639 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3640 struct lnet_ioctl_element_stats *stats;
3645 /* get the tunables if they are available */
3646 if (cfg_ni->lic_cfg_hdr.ioc_len <
3647 sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
3650 stats = (struct lnet_ioctl_element_stats *)
3652 tun = (struct lnet_ioctl_config_lnd_tunables *)
3653 (cfg_ni->lic_bulk + sizeof(*stats));
3655 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
3658 mutex_lock(&the_lnet.ln_api_mutex);
3659 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
3660 mutex_unlock(&the_lnet.ln_api_mutex);
3664 case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
3665 struct lnet_ioctl_element_msg_stats *msg_stats = arg;
3667 if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
3670 mutex_lock(&the_lnet.ln_api_mutex);
3671 rc = lnet_get_ni_stats(msg_stats);
3672 mutex_unlock(&the_lnet.ln_api_mutex);
3677 case IOC_LIBCFS_GET_NET: {
3678 size_t total = sizeof(*config) +
3679 sizeof(struct lnet_ioctl_net_config);
3682 if (config->cfg_hdr.ioc_len < total)
3685 mutex_lock(&the_lnet.ln_api_mutex);
3686 rc = lnet_get_net_config(config);
3687 mutex_unlock(&the_lnet.ln_api_mutex);
3691 case IOC_LIBCFS_GET_LNET_STATS:
3693 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
3695 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
3698 mutex_lock(&the_lnet.ln_api_mutex);
3699 lnet_counters_get(&lnet_stats->st_cntrs);
3700 mutex_unlock(&the_lnet.ln_api_mutex);
3704 case IOC_LIBCFS_CONFIG_RTR:
3707 if (config->cfg_hdr.ioc_len < sizeof(*config))
3710 mutex_lock(&the_lnet.ln_api_mutex);
3711 if (config->cfg_config_u.cfg_buffers.buf_enable) {
3712 rc = lnet_rtrpools_enable();
3713 mutex_unlock(&the_lnet.ln_api_mutex);
3716 lnet_rtrpools_disable();
3717 mutex_unlock(&the_lnet.ln_api_mutex);
3720 case IOC_LIBCFS_ADD_BUF:
3723 if (config->cfg_hdr.ioc_len < sizeof(*config))
3726 mutex_lock(&the_lnet.ln_api_mutex);
3727 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
3729 config->cfg_config_u.cfg_buffers.
3731 config->cfg_config_u.cfg_buffers.
3733 mutex_unlock(&the_lnet.ln_api_mutex);
3736 case IOC_LIBCFS_SET_NUMA_RANGE: {
3737 struct lnet_ioctl_set_value *numa;
3739 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3741 lnet_net_lock(LNET_LOCK_EX);
3742 lnet_numa_range = numa->sv_value;
3743 lnet_net_unlock(LNET_LOCK_EX);
3747 case IOC_LIBCFS_GET_NUMA_RANGE: {
3748 struct lnet_ioctl_set_value *numa;
3750 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3752 numa->sv_value = lnet_numa_range;
3756 case IOC_LIBCFS_GET_BUF: {
3757 struct lnet_ioctl_pool_cfg *pool_cfg;
3758 size_t total = sizeof(*config) + sizeof(*pool_cfg);
3762 if (config->cfg_hdr.ioc_len < total)
3765 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
3767 mutex_lock(&the_lnet.ln_api_mutex);
3768 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
3769 mutex_unlock(&the_lnet.ln_api_mutex);
3773 case IOC_LIBCFS_GET_LOCAL_HSTATS: {
3774 struct lnet_ioctl_local_ni_hstats *stats = arg;
3776 if (stats->hlni_hdr.ioc_len < sizeof(*stats))
3779 mutex_lock(&the_lnet.ln_api_mutex);
3780 rc = lnet_get_local_ni_hstats(stats);
3781 mutex_unlock(&the_lnet.ln_api_mutex);
3786 case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
3787 struct lnet_ioctl_recovery_list *list = arg;
3788 if (list->rlst_hdr.ioc_len < sizeof(*list))
3791 mutex_lock(&the_lnet.ln_api_mutex);
3792 if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
3793 rc = lnet_get_local_ni_recovery_list(list);
3795 rc = lnet_get_peer_ni_recovery_list(list);
3796 mutex_unlock(&the_lnet.ln_api_mutex);
3800 case IOC_LIBCFS_ADD_PEER_NI: {
3801 struct lnet_ioctl_peer_cfg *cfg = arg;
3803 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3806 mutex_lock(&the_lnet.ln_api_mutex);
3807 rc = lnet_add_peer_ni(cfg->prcfg_prim_nid,
3810 mutex_unlock(&the_lnet.ln_api_mutex);
3814 case IOC_LIBCFS_DEL_PEER_NI: {
3815 struct lnet_ioctl_peer_cfg *cfg = arg;
3817 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3820 mutex_lock(&the_lnet.ln_api_mutex);
3821 rc = lnet_del_peer_ni(cfg->prcfg_prim_nid,
3822 cfg->prcfg_cfg_nid);
3823 mutex_unlock(&the_lnet.ln_api_mutex);
3827 case IOC_LIBCFS_GET_PEER_INFO: {
3828 struct lnet_ioctl_peer *peer_info = arg;
3830 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
3833 mutex_lock(&the_lnet.ln_api_mutex);
3834 rc = lnet_get_peer_ni_info(
3835 peer_info->pr_count,
3837 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
3838 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
3839 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
3840 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
3841 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
3842 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
3843 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
3844 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
3845 mutex_unlock(&the_lnet.ln_api_mutex);
3849 case IOC_LIBCFS_GET_PEER_NI: {
3850 struct lnet_ioctl_peer_cfg *cfg = arg;
3852 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3855 mutex_lock(&the_lnet.ln_api_mutex);
3856 rc = lnet_get_peer_info(cfg,
3857 (void __user *)cfg->prcfg_bulk);
3858 mutex_unlock(&the_lnet.ln_api_mutex);
3862 case IOC_LIBCFS_GET_PEER_LIST: {
3863 struct lnet_ioctl_peer_cfg *cfg = arg;
3865 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3868 mutex_lock(&the_lnet.ln_api_mutex);
3869 rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
3870 (struct lnet_process_id __user *)cfg->prcfg_bulk);
3871 mutex_unlock(&the_lnet.ln_api_mutex);
3875 case IOC_LIBCFS_SET_HEALHV: {
3876 struct lnet_ioctl_reset_health_cfg *cfg = arg;
3878 if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
3880 if (cfg->rh_value < 0 ||
3881 cfg->rh_value > LNET_MAX_HEALTH_VALUE)
3882 value = LNET_MAX_HEALTH_VALUE;
3884 value = cfg->rh_value;
3885 CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
3886 value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
3887 "local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
3888 mutex_lock(&the_lnet.ln_api_mutex);
3889 if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI)
3890 lnet_ni_set_healthv(cfg->rh_nid, value,
3893 lnet_peer_ni_set_healthv(cfg->rh_nid, value,
3895 mutex_unlock(&the_lnet.ln_api_mutex);
3899 case IOC_LIBCFS_NOTIFY_ROUTER: {
3900 time64_t deadline = ktime_get_real_seconds() - data->ioc_u64[0];
3902 /* The deadline passed in by the user should be some time in
3903 * seconds in the future since the UNIX epoch. We have to map
3904 * that deadline to the wall clock.
3906 deadline += ktime_get_seconds();
3907 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, false,
3911 case IOC_LIBCFS_LNET_DIST:
3912 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
3913 if (rc < 0 && rc != -EHOSTUNREACH)
3916 data->ioc_u32[0] = rc;
3919 case IOC_LIBCFS_TESTPROTOCOMPAT:
3920 the_lnet.ln_testprotocompat = data->ioc_flags;
3923 case IOC_LIBCFS_LNET_FAULT:
3924 return lnet_fault_ctl(data->ioc_flags, data);
3926 case IOC_LIBCFS_PING: {
3927 signed long timeout;
3929 id.nid = data->ioc_nid;
3930 id.pid = data->ioc_u32[0];
3932 /* If timeout is negative then set default of 3 minutes */
3933 if (((s32)data->ioc_u32[1] <= 0) ||
3934 data->ioc_u32[1] > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
3935 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
3937 timeout = nsecs_to_jiffies(data->ioc_u32[1] * NSEC_PER_MSEC);
3939 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
3940 data->ioc_plen1 / sizeof(struct lnet_process_id));
3945 data->ioc_count = rc;
3949 case IOC_LIBCFS_PING_PEER: {
3950 struct lnet_ioctl_ping_data *ping = arg;
3951 struct lnet_peer *lp;
3952 signed long timeout;
3954 /* If timeout is negative then set default of 3 minutes */
3955 if (((s32)ping->op_param) <= 0 ||
3956 ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
3957 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
3959 timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
3961 rc = lnet_ping(ping->ping_id, timeout,
3967 mutex_lock(&the_lnet.ln_api_mutex);
3968 lp = lnet_find_peer(ping->ping_id.nid);
3970 ping->ping_id.nid = lp->lp_primary_nid;
3971 ping->mr_info = lnet_peer_is_multi_rail(lp);
3972 lnet_peer_decref_locked(lp);
3974 mutex_unlock(&the_lnet.ln_api_mutex);
3976 ping->ping_count = rc;
3980 case IOC_LIBCFS_DISCOVER: {
3981 struct lnet_ioctl_ping_data *discover = arg;
3982 struct lnet_peer *lp;
3984 rc = lnet_discover(discover->ping_id, discover->op_param,
3986 discover->ping_count);
3990 mutex_lock(&the_lnet.ln_api_mutex);
3991 lp = lnet_find_peer(discover->ping_id.nid);
3993 discover->ping_id.nid = lp->lp_primary_nid;
3994 discover->mr_info = lnet_peer_is_multi_rail(lp);
3995 lnet_peer_decref_locked(lp);
3997 mutex_unlock(&the_lnet.ln_api_mutex);
3999 discover->ping_count = rc;
4004 ni = lnet_net2ni_addref(data->ioc_net);
4008 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
4011 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
4018 EXPORT_SYMBOL(LNetCtl);
4020 void LNetDebugPeer(struct lnet_process_id id)
4022 lnet_debug_peer(id.nid);
4024 EXPORT_SYMBOL(LNetDebugPeer);
4027 * Determine if the specified peer \a nid is on the local node.
4029 * \param nid peer nid to check
4031 * \retval true If peer NID is on the local node.
4032 * \retval false If peer NID is not on the local node.
4034 bool LNetIsPeerLocal(lnet_nid_t nid)
4036 struct lnet_net *net;
4040 cpt = lnet_net_lock_current();
4041 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4042 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4043 if (ni->ni_nid == nid) {
4044 lnet_net_unlock(cpt);
4049 lnet_net_unlock(cpt);
4053 EXPORT_SYMBOL(LNetIsPeerLocal);
4056 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
4057 * Note that all interfaces share a same PID, as requested by LNetNIInit().
4059 * \param index Index of the interface to look up.
4060 * \param id On successful return, this location will hold the
4061 * struct lnet_process_id ID of the interface.
4063 * \retval 0 If an interface exists at \a index.
4064 * \retval -ENOENT If no interface has been found.
4067 LNetGetId(unsigned int index, struct lnet_process_id *id)
4070 struct lnet_net *net;
4074 LASSERT(the_lnet.ln_refcount > 0);
4076 cpt = lnet_net_lock_current();
4078 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4079 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4083 id->nid = ni->ni_nid;
4084 id->pid = the_lnet.ln_pid;
4090 lnet_net_unlock(cpt);
4093 EXPORT_SYMBOL(LNetGetId);
4098 struct lnet_handle_md mdh;
4099 struct completion completion;
4103 lnet_ping_event_handler(struct lnet_event *event)
4105 struct ping_data *pd = event->md_user_ptr;
4107 CDEBUG(D_NET, "ping event (%d %d)%s\n",
4108 event->type, event->status,
4109 event->unlinked ? " unlinked" : "");
4111 if (event->status) {
4113 pd->rc = event->status;
4114 } else if (event->type == LNET_EVENT_REPLY) {
4116 pd->rc = event->mlength;
4118 if (event->unlinked)
4119 complete(&pd->completion);
4122 static int lnet_ping(struct lnet_process_id id, signed long timeout,
4123 struct lnet_process_id __user *ids, int n_ids)
4125 struct lnet_md md = { NULL };
4126 struct ping_data pd = { 0 };
4127 struct lnet_ping_buffer *pbuf;
4128 struct lnet_process_id tmpid;
4134 /* n_ids limit is arbitrary */
4135 if (n_ids <= 0 || id.nid == LNET_NID_ANY)
4139 * if the user buffer has more space than the lnet_interfaces_max
4140 * then only fill it up to lnet_interfaces_max
4142 if (n_ids > lnet_interfaces_max)
4143 n_ids = lnet_interfaces_max;
4145 if (id.pid == LNET_PID_ANY)
4146 id.pid = LNET_PID_LUSTRE;
4148 pbuf = lnet_ping_buffer_alloc(n_ids, GFP_NOFS);
4152 /* initialize md content */
4153 md.start = &pbuf->pb_info;
4154 md.length = LNET_PING_INFO_SIZE(n_ids);
4155 md.threshold = 2; /* GET/REPLY */
4157 md.options = LNET_MD_TRUNCATE;
4159 md.handler = lnet_ping_event_handler;
4161 init_completion(&pd.completion);
4163 rc = LNetMDBind(md, LNET_UNLINK, &pd.mdh);
4165 CERROR("Can't bind MD: %d\n", rc);
4166 goto fail_ping_buffer_decref;
4169 rc = LNetGet(LNET_NID_ANY, pd.mdh, id,
4170 LNET_RESERVED_PORTAL,
4171 LNET_PROTO_PING_MATCHBITS, 0, false);
4174 /* Don't CERROR; this could be deliberate! */
4175 rc2 = LNetMDUnlink(pd.mdh);
4178 /* NB must wait for the UNLINK event below... */
4181 if (wait_for_completion_timeout(&pd.completion, timeout) == 0) {
4182 /* Ensure completion in finite time... */
4183 LNetMDUnlink(pd.mdh);
4184 wait_for_completion(&pd.completion);
4188 goto fail_ping_buffer_decref;
4192 LASSERT(nob >= 0 && nob <= LNET_PING_INFO_SIZE(n_ids));
4194 rc = -EPROTO; /* if I can't parse... */
4197 CERROR("%s: ping info too short %d\n",
4198 libcfs_id2str(id), nob);
4199 goto fail_ping_buffer_decref;
4202 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
4203 lnet_swap_pinginfo(pbuf);
4204 } else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
4205 CERROR("%s: Unexpected magic %08x\n",
4206 libcfs_id2str(id), pbuf->pb_info.pi_magic);
4207 goto fail_ping_buffer_decref;
4210 if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
4211 CERROR("%s: ping w/o NI status: 0x%x\n",
4212 libcfs_id2str(id), pbuf->pb_info.pi_features);
4213 goto fail_ping_buffer_decref;
4216 if (nob < LNET_PING_INFO_SIZE(0)) {
4217 CERROR("%s: Short reply %d(%d min)\n",
4219 nob, (int)LNET_PING_INFO_SIZE(0));
4220 goto fail_ping_buffer_decref;
4223 if (pbuf->pb_info.pi_nnis < n_ids)
4224 n_ids = pbuf->pb_info.pi_nnis;
4226 if (nob < LNET_PING_INFO_SIZE(n_ids)) {
4227 CERROR("%s: Short reply %d(%d expected)\n",
4229 nob, (int)LNET_PING_INFO_SIZE(n_ids));
4230 goto fail_ping_buffer_decref;
4233 rc = -EFAULT; /* if I segv in copy_to_user()... */
4235 memset(&tmpid, 0, sizeof(tmpid));
4236 for (i = 0; i < n_ids; i++) {
4237 tmpid.pid = pbuf->pb_info.pi_pid;
4238 tmpid.nid = pbuf->pb_info.pi_ni[i].ns_nid;
4239 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
4240 goto fail_ping_buffer_decref;
4242 rc = pbuf->pb_info.pi_nnis;
4244 fail_ping_buffer_decref:
4245 lnet_ping_buffer_decref(pbuf);
4250 lnet_discover(struct lnet_process_id id, __u32 force,
4251 struct lnet_process_id __user *ids, int n_ids)
4253 struct lnet_peer_ni *lpni;
4254 struct lnet_peer_ni *p;
4255 struct lnet_peer *lp;
4256 struct lnet_process_id *buf;
4260 int max_intf = lnet_interfaces_max;
4263 id.nid == LNET_NID_ANY)
4266 if (id.pid == LNET_PID_ANY)
4267 id.pid = LNET_PID_LUSTRE;
4270 * if the user buffer has more space than the max_intf
4271 * then only fill it up to max_intf
4273 if (n_ids > max_intf)
4276 CFS_ALLOC_PTR_ARRAY(buf, n_ids);
4280 cpt = lnet_net_lock_current();
4281 lpni = lnet_nid2peerni_locked(id.nid, LNET_NID_ANY, cpt);
4288 * Clearing the NIDS_UPTODATE flag ensures the peer will
4289 * be discovered, provided discovery has not been disabled.
4291 lp = lpni->lpni_peer_net->lpn_peer;
4292 spin_lock(&lp->lp_lock);
4293 lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
4294 /* If the force flag is set, force a PING and PUSH as well. */
4296 lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
4297 spin_unlock(&lp->lp_lock);
4298 rc = lnet_discover_peer_locked(lpni, cpt, true);
4302 /* Peer may have changed. */
4303 lp = lpni->lpni_peer_net->lpn_peer;
4304 if (lp->lp_nnis < n_ids)
4305 n_ids = lp->lp_nnis;
4309 while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
4310 buf[i].pid = id.pid;
4311 buf[i].nid = p->lpni_nid;
4316 lnet_net_unlock(cpt);
4319 if (copy_to_user(ids, buf, n_ids * sizeof(*buf)))
4325 lnet_peer_ni_decref_locked(lpni);
4327 lnet_net_unlock(cpt);
4329 CFS_FREE_PTR_ARRAY(buf, n_ids);
4335 * Retrieve peer discovery status.
4337 * \retval 1 if lnet_peer_discovery_disabled is 0
4338 * \retval 0 if lnet_peer_discovery_disabled is 1
4341 LNetGetPeerDiscoveryStatus(void)
4343 return !lnet_peer_discovery_disabled;
4345 EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);