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/udsp.h>
45 #include <lnet/lib-lnet.h>
47 #define D_LNI D_CONSOLE
50 * initialize ln_api_mutex statically, since it needs to be used in
51 * discovery_set callback. That module parameter callback can be called
52 * before module init completes. The mutex needs to be ready for use then.
54 struct lnet the_lnet = {
55 .ln_api_mutex = __MUTEX_INITIALIZER(the_lnet.ln_api_mutex),
56 }; /* THE state of the network */
57 EXPORT_SYMBOL(the_lnet);
59 static char *ip2nets = "";
60 module_param(ip2nets, charp, 0444);
61 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
63 static char *networks = "";
64 module_param(networks, charp, 0444);
65 MODULE_PARM_DESC(networks, "local networks");
67 static char *routes = "";
68 module_param(routes, charp, 0444);
69 MODULE_PARM_DESC(routes, "routes to non-local networks");
71 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
72 module_param(rnet_htable_size, int, 0444);
73 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
75 static int use_tcp_bonding;
76 module_param(use_tcp_bonding, int, 0444);
77 MODULE_PARM_DESC(use_tcp_bonding,
78 "use_tcp_bonding parameter has been removed");
80 unsigned int lnet_numa_range = 0;
81 module_param(lnet_numa_range, uint, 0444);
82 MODULE_PARM_DESC(lnet_numa_range,
83 "NUMA range to consider during Multi-Rail selection");
86 * lnet_health_sensitivity determines by how much we decrement the health
87 * value on sending error. The value defaults to 100, which means health
88 * interface health is decremented by 100 points every failure.
90 unsigned int lnet_health_sensitivity = 100;
91 static int sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp);
92 #ifdef HAVE_KERNEL_PARAM_OPS
93 static struct kernel_param_ops param_ops_health_sensitivity = {
94 .set = sensitivity_set,
97 #define param_check_health_sensitivity(name, p) \
98 __param_check(name, p, int)
99 module_param(lnet_health_sensitivity, health_sensitivity, S_IRUGO|S_IWUSR);
101 module_param_call(lnet_health_sensitivity, sensitivity_set, param_get_int,
102 &lnet_health_sensitivity, S_IRUGO|S_IWUSR);
104 MODULE_PARM_DESC(lnet_health_sensitivity,
105 "Value to decrement the health value by on error");
108 * lnet_recovery_interval determines how often we should perform recovery
109 * on unhealthy interfaces.
111 unsigned int lnet_recovery_interval = 1;
112 static int recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp);
113 #ifdef HAVE_KERNEL_PARAM_OPS
114 static struct kernel_param_ops param_ops_recovery_interval = {
115 .set = recovery_interval_set,
116 .get = param_get_int,
118 #define param_check_recovery_interval(name, p) \
119 __param_check(name, p, int)
120 module_param(lnet_recovery_interval, recovery_interval, S_IRUGO|S_IWUSR);
122 module_param_call(lnet_recovery_interval, recovery_interval_set, param_get_int,
123 &lnet_recovery_interval, S_IRUGO|S_IWUSR);
125 MODULE_PARM_DESC(lnet_recovery_interval,
126 "Interval to recover unhealthy interfaces in seconds");
128 unsigned int lnet_recovery_limit;
129 module_param(lnet_recovery_limit, uint, 0644);
130 MODULE_PARM_DESC(lnet_recovery_limit,
131 "How long to attempt recovery of unhealthy peer interfaces in seconds. Set to 0 to allow indefinite recovery");
133 static int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
134 static int intf_max_set(const char *val, cfs_kernel_param_arg_t *kp);
136 static struct kernel_param_ops param_ops_interfaces_max = {
138 .get = param_get_int,
141 #define param_check_interfaces_max(name, p) \
142 __param_check(name, p, int)
144 #ifdef HAVE_KERNEL_PARAM_OPS
145 module_param(lnet_interfaces_max, interfaces_max, 0644);
147 module_param_call(lnet_interfaces_max, intf_max_set, param_get_int,
148 ¶m_ops_interfaces_max, 0644);
150 MODULE_PARM_DESC(lnet_interfaces_max,
151 "Maximum number of interfaces in a node.");
153 unsigned lnet_peer_discovery_disabled = 0;
154 static int discovery_set(const char *val, cfs_kernel_param_arg_t *kp);
156 static struct kernel_param_ops param_ops_discovery_disabled = {
157 .set = discovery_set,
158 .get = param_get_int,
161 #define param_check_discovery_disabled(name, p) \
162 __param_check(name, p, int)
163 #ifdef HAVE_KERNEL_PARAM_OPS
164 module_param(lnet_peer_discovery_disabled, discovery_disabled, 0644);
166 module_param_call(lnet_peer_discovery_disabled, discovery_set, param_get_int,
167 ¶m_ops_discovery_disabled, 0644);
169 MODULE_PARM_DESC(lnet_peer_discovery_disabled,
170 "Set to 1 to disable peer discovery on this node.");
172 unsigned int lnet_drop_asym_route;
173 static int drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp);
175 static struct kernel_param_ops param_ops_drop_asym_route = {
176 .set = drop_asym_route_set,
177 .get = param_get_int,
180 #define param_check_drop_asym_route(name, p) \
181 __param_check(name, p, int)
182 #ifdef HAVE_KERNEL_PARAM_OPS
183 module_param(lnet_drop_asym_route, drop_asym_route, 0644);
185 module_param_call(lnet_drop_asym_route, drop_asym_route_set, param_get_int,
186 ¶m_ops_drop_asym_route, 0644);
188 MODULE_PARM_DESC(lnet_drop_asym_route,
189 "Set to 1 to drop asymmetrical route messages.");
191 #define LNET_TRANSACTION_TIMEOUT_DEFAULT 50
192 unsigned int lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_DEFAULT;
193 static int transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp);
194 #ifdef HAVE_KERNEL_PARAM_OPS
195 static struct kernel_param_ops param_ops_transaction_timeout = {
196 .set = transaction_to_set,
197 .get = param_get_int,
200 #define param_check_transaction_timeout(name, p) \
201 __param_check(name, p, int)
202 module_param(lnet_transaction_timeout, transaction_timeout, S_IRUGO|S_IWUSR);
204 module_param_call(lnet_transaction_timeout, transaction_to_set, param_get_int,
205 &lnet_transaction_timeout, S_IRUGO|S_IWUSR);
207 MODULE_PARM_DESC(lnet_transaction_timeout,
208 "Maximum number of seconds to wait for a peer response.");
210 #define LNET_RETRY_COUNT_DEFAULT 2
211 unsigned int lnet_retry_count = LNET_RETRY_COUNT_DEFAULT;
212 static int retry_count_set(const char *val, cfs_kernel_param_arg_t *kp);
213 #ifdef HAVE_KERNEL_PARAM_OPS
214 static struct kernel_param_ops param_ops_retry_count = {
215 .set = retry_count_set,
216 .get = param_get_int,
219 #define param_check_retry_count(name, p) \
220 __param_check(name, p, int)
221 module_param(lnet_retry_count, retry_count, S_IRUGO|S_IWUSR);
223 module_param_call(lnet_retry_count, retry_count_set, param_get_int,
224 &lnet_retry_count, S_IRUGO|S_IWUSR);
226 MODULE_PARM_DESC(lnet_retry_count,
227 "Maximum number of times to retry transmitting a message");
229 unsigned int lnet_response_tracking = 3;
230 static int response_tracking_set(const char *val, cfs_kernel_param_arg_t *kp);
232 #ifdef HAVE_KERNEL_PARAM_OPS
233 static struct kernel_param_ops param_ops_response_tracking = {
234 .set = response_tracking_set,
235 .get = param_get_int,
238 #define param_check_response_tracking(name, p) \
239 __param_check(name, p, int)
240 module_param(lnet_response_tracking, response_tracking, 0644);
242 module_param_call(lnet_response_tracking, response_tracking_set, param_get_int,
243 &lnet_response_tracking, 0644);
245 MODULE_PARM_DESC(lnet_response_tracking,
246 "(0|1|2|3) LNet Internal Only|GET Reply only|PUT ACK only|Full Tracking (default)");
248 #define LNET_LND_TIMEOUT_DEFAULT ((LNET_TRANSACTION_TIMEOUT_DEFAULT - 1) / \
249 (LNET_RETRY_COUNT_DEFAULT + 1))
250 unsigned int lnet_lnd_timeout = LNET_LND_TIMEOUT_DEFAULT;
251 static void lnet_set_lnd_timeout(void)
253 lnet_lnd_timeout = (lnet_transaction_timeout - 1) /
254 (lnet_retry_count + 1);
257 unsigned int lnet_current_net_count;
260 * This sequence number keeps track of how many times DLC was used to
261 * update the local NIs. It is incremented when a NI is added or
262 * removed and checked when sending a message to determine if there is
263 * a need to re-run the selection algorithm. See lnet_select_pathway()
264 * for more details on its usage.
266 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
268 static int lnet_ping(struct lnet_process_id id, signed long timeout,
269 struct lnet_process_id __user *ids, int n_ids);
271 static int lnet_discover(struct lnet_process_id id, __u32 force,
272 struct lnet_process_id __user *ids, int n_ids);
275 sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp)
278 unsigned *sensitivity = (unsigned *)kp->arg;
281 rc = kstrtoul(val, 0, &value);
283 CERROR("Invalid module parameter value for 'lnet_health_sensitivity'\n");
288 * The purpose of locking the api_mutex here is to ensure that
289 * the correct value ends up stored properly.
291 mutex_lock(&the_lnet.ln_api_mutex);
293 if (value > LNET_MAX_HEALTH_VALUE) {
294 mutex_unlock(&the_lnet.ln_api_mutex);
295 CERROR("Invalid health value. Maximum: %d value = %lu\n",
296 LNET_MAX_HEALTH_VALUE, value);
300 if (*sensitivity != 0 && value == 0 && lnet_retry_count != 0) {
301 lnet_retry_count = 0;
302 lnet_set_lnd_timeout();
305 *sensitivity = value;
307 mutex_unlock(&the_lnet.ln_api_mutex);
313 recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp)
316 unsigned *interval = (unsigned *)kp->arg;
319 rc = kstrtoul(val, 0, &value);
321 CERROR("Invalid module parameter value for 'lnet_recovery_interval'\n");
326 CERROR("lnet_recovery_interval must be at least 1 second\n");
331 * The purpose of locking the api_mutex here is to ensure that
332 * the correct value ends up stored properly.
334 mutex_lock(&the_lnet.ln_api_mutex);
338 mutex_unlock(&the_lnet.ln_api_mutex);
344 discovery_set(const char *val, cfs_kernel_param_arg_t *kp)
347 unsigned *discovery_off = (unsigned *)kp->arg;
349 struct lnet_ping_buffer *pbuf;
351 rc = kstrtoul(val, 0, &value);
353 CERROR("Invalid module parameter value for 'lnet_peer_discovery_disabled'\n");
357 value = (value) ? 1 : 0;
360 * The purpose of locking the api_mutex here is to ensure that
361 * the correct value ends up stored properly.
363 mutex_lock(&the_lnet.ln_api_mutex);
365 if (value == *discovery_off) {
366 mutex_unlock(&the_lnet.ln_api_mutex);
371 * We still want to set the discovery value even when LNet is not
372 * running. This is the case when LNet is being loaded and we want
373 * the module parameters to take effect. Otherwise if we're
374 * changing the value dynamically, we want to set it after
377 if (the_lnet.ln_state != LNET_STATE_RUNNING) {
378 *discovery_off = value;
379 mutex_unlock(&the_lnet.ln_api_mutex);
383 /* tell peers that discovery setting has changed */
384 lnet_net_lock(LNET_LOCK_EX);
385 pbuf = the_lnet.ln_ping_target;
387 pbuf->pb_info.pi_features &= ~LNET_PING_FEAT_DISCOVERY;
389 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
390 lnet_net_unlock(LNET_LOCK_EX);
392 /* only send a push when we're turning off discovery */
393 if (*discovery_off <= 0 && value > 0)
394 lnet_push_update_to_peers(1);
395 *discovery_off = value;
397 mutex_unlock(&the_lnet.ln_api_mutex);
403 drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp)
406 unsigned int *drop_asym_route = (unsigned int *)kp->arg;
409 rc = kstrtoul(val, 0, &value);
411 CERROR("Invalid module parameter value for "
412 "'lnet_drop_asym_route'\n");
417 * The purpose of locking the api_mutex here is to ensure that
418 * the correct value ends up stored properly.
420 mutex_lock(&the_lnet.ln_api_mutex);
422 if (value == *drop_asym_route) {
423 mutex_unlock(&the_lnet.ln_api_mutex);
427 *drop_asym_route = value;
429 mutex_unlock(&the_lnet.ln_api_mutex);
435 transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp)
438 unsigned *transaction_to = (unsigned *)kp->arg;
441 rc = kstrtoul(val, 0, &value);
443 CERROR("Invalid module parameter value for 'lnet_transaction_timeout'\n");
448 * The purpose of locking the api_mutex here is to ensure that
449 * the correct value ends up stored properly.
451 mutex_lock(&the_lnet.ln_api_mutex);
453 if (value <= lnet_retry_count || value == 0) {
454 mutex_unlock(&the_lnet.ln_api_mutex);
455 CERROR("Invalid value for lnet_transaction_timeout (%lu). "
456 "Has to be greater than lnet_retry_count (%u)\n",
457 value, lnet_retry_count);
461 if (value == *transaction_to) {
462 mutex_unlock(&the_lnet.ln_api_mutex);
466 *transaction_to = value;
467 /* Update the lnet_lnd_timeout now that we've modified the
468 * transaction timeout
470 lnet_set_lnd_timeout();
472 mutex_unlock(&the_lnet.ln_api_mutex);
478 retry_count_set(const char *val, cfs_kernel_param_arg_t *kp)
481 unsigned *retry_count = (unsigned *)kp->arg;
484 rc = kstrtoul(val, 0, &value);
486 CERROR("Invalid module parameter value for 'lnet_retry_count'\n");
491 * The purpose of locking the api_mutex here is to ensure that
492 * the correct value ends up stored properly.
494 mutex_lock(&the_lnet.ln_api_mutex);
496 if (lnet_health_sensitivity == 0 && value > 0) {
497 mutex_unlock(&the_lnet.ln_api_mutex);
498 CERROR("Can not set lnet_retry_count when health feature is turned off\n");
502 if (value > lnet_transaction_timeout) {
503 mutex_unlock(&the_lnet.ln_api_mutex);
504 CERROR("Invalid value for lnet_retry_count (%lu). "
505 "Has to be smaller than lnet_transaction_timeout (%u)\n",
506 value, lnet_transaction_timeout);
510 *retry_count = value;
512 /* Update the lnet_lnd_timeout now that we've modified the
515 lnet_set_lnd_timeout();
517 mutex_unlock(&the_lnet.ln_api_mutex);
523 intf_max_set(const char *val, cfs_kernel_param_arg_t *kp)
527 rc = kstrtoint(val, 0, &value);
529 CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
533 if (value < LNET_INTERFACES_MIN) {
534 CWARN("max interfaces provided are too small, setting to %d\n",
535 LNET_INTERFACES_MAX_DEFAULT);
536 value = LNET_INTERFACES_MAX_DEFAULT;
539 *(int *)kp->arg = value;
545 response_tracking_set(const char *val, cfs_kernel_param_arg_t *kp)
548 unsigned long new_value;
550 rc = kstrtoul(val, 0, &new_value);
552 CERROR("Invalid value for 'lnet_response_tracking'\n");
556 if (new_value < 0 || new_value > 3) {
557 CWARN("Invalid value (%lu) for 'lnet_response_tracking'\n",
562 lnet_response_tracking = new_value;
568 lnet_get_routes(void)
574 lnet_get_networks(void)
579 if (*networks != 0 && *ip2nets != 0) {
580 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
581 "'ip2nets' but not both at once\n");
586 rc = lnet_parse_ip2nets(&nets, ip2nets);
587 return (rc == 0) ? nets : NULL;
597 lnet_init_locks(void)
599 spin_lock_init(&the_lnet.ln_eq_wait_lock);
600 spin_lock_init(&the_lnet.ln_msg_resend_lock);
601 init_completion(&the_lnet.ln_mt_wait_complete);
602 mutex_init(&the_lnet.ln_lnd_mutex);
605 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
606 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
608 struct kmem_cache *lnet_udsp_cachep; /* udsp cache */
609 struct kmem_cache *lnet_rspt_cachep; /* response tracker cache */
610 struct kmem_cache *lnet_msg_cachep;
613 lnet_slab_setup(void)
615 /* create specific kmem_cache for MEs and small MDs (i.e., originally
616 * allocated in <size-xxx> kmem_cache).
618 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
620 if (!lnet_mes_cachep)
623 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
624 LNET_SMALL_MD_SIZE, 0, 0,
626 if (!lnet_small_mds_cachep)
629 lnet_udsp_cachep = kmem_cache_create("lnet_udsp",
630 sizeof(struct lnet_udsp),
632 if (!lnet_udsp_cachep)
635 lnet_rspt_cachep = kmem_cache_create("lnet_rspt", sizeof(struct lnet_rsp_tracker),
637 if (!lnet_rspt_cachep)
640 lnet_msg_cachep = kmem_cache_create("lnet_msg", sizeof(struct lnet_msg),
642 if (!lnet_msg_cachep)
649 lnet_slab_cleanup(void)
651 if (lnet_msg_cachep) {
652 kmem_cache_destroy(lnet_msg_cachep);
653 lnet_msg_cachep = NULL;
656 if (lnet_rspt_cachep) {
657 kmem_cache_destroy(lnet_rspt_cachep);
658 lnet_rspt_cachep = NULL;
661 if (lnet_udsp_cachep) {
662 kmem_cache_destroy(lnet_udsp_cachep);
663 lnet_udsp_cachep = NULL;
666 if (lnet_small_mds_cachep) {
667 kmem_cache_destroy(lnet_small_mds_cachep);
668 lnet_small_mds_cachep = NULL;
671 if (lnet_mes_cachep) {
672 kmem_cache_destroy(lnet_mes_cachep);
673 lnet_mes_cachep = NULL;
678 lnet_create_remote_nets_table(void)
681 struct list_head *hash;
683 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
684 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
685 CFS_ALLOC_PTR_ARRAY(hash, LNET_REMOTE_NETS_HASH_SIZE);
687 CERROR("Failed to create remote nets hash table\n");
691 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
692 INIT_LIST_HEAD(&hash[i]);
693 the_lnet.ln_remote_nets_hash = hash;
698 lnet_destroy_remote_nets_table(void)
702 if (the_lnet.ln_remote_nets_hash == NULL)
705 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
706 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
708 CFS_FREE_PTR_ARRAY(the_lnet.ln_remote_nets_hash,
709 LNET_REMOTE_NETS_HASH_SIZE);
710 the_lnet.ln_remote_nets_hash = NULL;
714 lnet_destroy_locks(void)
716 if (the_lnet.ln_res_lock != NULL) {
717 cfs_percpt_lock_free(the_lnet.ln_res_lock);
718 the_lnet.ln_res_lock = NULL;
721 if (the_lnet.ln_net_lock != NULL) {
722 cfs_percpt_lock_free(the_lnet.ln_net_lock);
723 the_lnet.ln_net_lock = NULL;
728 lnet_create_locks(void)
732 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
733 if (the_lnet.ln_res_lock == NULL)
736 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
737 if (the_lnet.ln_net_lock == NULL)
743 lnet_destroy_locks();
747 static void lnet_assert_wire_constants(void)
749 /* Wire protocol assertions generated by 'wirecheck'
750 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
751 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
752 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)
756 BUILD_BUG_ON(LNET_PROTO_TCP_MAGIC != 0xeebc0ded);
757 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MAJOR != 1);
758 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MINOR != 0);
759 BUILD_BUG_ON(LNET_MSG_ACK != 0);
760 BUILD_BUG_ON(LNET_MSG_PUT != 1);
761 BUILD_BUG_ON(LNET_MSG_GET != 2);
762 BUILD_BUG_ON(LNET_MSG_REPLY != 3);
763 BUILD_BUG_ON(LNET_MSG_HELLO != 4);
765 BUILD_BUG_ON((int)sizeof(lnet_nid_t) != 8);
766 BUILD_BUG_ON((int)sizeof(lnet_pid_t) != 4);
768 /* Checks for struct lnet_process_id_packed */
769 BUILD_BUG_ON((int)sizeof(struct lnet_process_id_packed) != 12);
770 BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, nid) != 0);
771 BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->nid) != 8);
772 BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, pid) != 8);
773 BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->pid) != 4);
775 /* Checks for struct lnet_handle_wire */
776 BUILD_BUG_ON((int)sizeof(struct lnet_handle_wire) != 16);
777 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
778 wh_interface_cookie) != 0);
779 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) != 8);
780 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
781 wh_object_cookie) != 8);
782 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) != 8);
784 /* Checks for struct struct lnet_magicversion */
785 BUILD_BUG_ON((int)sizeof(struct lnet_magicversion) != 8);
786 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, magic) != 0);
787 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->magic) != 4);
788 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_major) != 4);
789 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_major) != 2);
790 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion,
791 version_minor) != 6);
792 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_minor) != 2);
794 /* Checks for struct struct lnet_hdr */
795 BUILD_BUG_ON((int)sizeof(struct lnet_hdr) != 72);
796 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_nid) != 0);
797 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_nid) != 8);
798 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_nid) != 8);
799 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_nid) != 8);
800 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_pid) != 16);
801 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_pid) != 4);
802 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_pid) != 20);
803 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_pid) != 4);
804 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, type) != 24);
805 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->type) != 4);
806 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, payload_length) != 28);
807 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->payload_length) != 4);
808 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg) != 32);
809 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg) != 40);
812 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) != 32);
813 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) != 16);
814 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.match_bits) != 48);
815 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) != 8);
816 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.mlength) != 56);
817 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) != 4);
820 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) != 32);
821 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) != 16);
822 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.match_bits) != 48);
823 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) != 8);
824 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.hdr_data) != 56);
825 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) != 8);
826 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ptl_index) != 64);
827 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) != 4);
828 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.offset) != 68);
829 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) != 4);
832 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.return_wmd) != 32);
833 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) != 16);
834 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.match_bits) != 48);
835 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) != 8);
836 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.ptl_index) != 56);
837 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) != 4);
838 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.src_offset) != 60);
839 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) != 4);
840 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.sink_length) != 64);
841 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) != 4);
844 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) != 32);
845 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) != 16);
848 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.incarnation) != 32);
849 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) != 8);
850 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.type) != 40);
851 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) != 4);
853 /* Checks for struct lnet_ni_status and related constants */
854 BUILD_BUG_ON(LNET_NI_STATUS_INVALID != 0x00000000);
855 BUILD_BUG_ON(LNET_NI_STATUS_UP != 0x15aac0de);
856 BUILD_BUG_ON(LNET_NI_STATUS_DOWN != 0xdeadface);
858 /* Checks for struct lnet_ni_status */
859 BUILD_BUG_ON((int)sizeof(struct lnet_ni_status) != 16);
860 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_nid) != 0);
861 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_nid) != 8);
862 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_status) != 8);
863 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_status) != 4);
864 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_unused) != 12);
865 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_unused) != 4);
867 /* Checks for struct lnet_ping_info and related constants */
868 BUILD_BUG_ON(LNET_PROTO_PING_MAGIC != 0x70696E67);
869 BUILD_BUG_ON(LNET_PING_FEAT_INVAL != 0);
870 BUILD_BUG_ON(LNET_PING_FEAT_BASE != 1);
871 BUILD_BUG_ON(LNET_PING_FEAT_NI_STATUS != 2);
872 BUILD_BUG_ON(LNET_PING_FEAT_RTE_DISABLED != 4);
873 BUILD_BUG_ON(LNET_PING_FEAT_MULTI_RAIL != 8);
874 BUILD_BUG_ON(LNET_PING_FEAT_DISCOVERY != 16);
875 BUILD_BUG_ON(LNET_PING_FEAT_BITS != 31);
877 /* Checks for struct lnet_ping_info */
878 BUILD_BUG_ON((int)sizeof(struct lnet_ping_info) != 16);
879 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_magic) != 0);
880 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_magic) != 4);
881 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_features) != 4);
882 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_features) != 4);
883 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_pid) != 8);
884 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_pid) != 4);
885 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_nnis) != 12);
886 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_nnis) != 4);
887 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_ni) != 16);
888 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_ni) != 0);
890 /* Acceptor connection request */
891 BUILD_BUG_ON(LNET_PROTO_ACCEPTOR_VERSION != 1);
893 /* Checks for struct lnet_acceptor_connreq */
894 BUILD_BUG_ON((int)sizeof(struct lnet_acceptor_connreq) != 16);
895 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_magic) != 0);
896 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_magic) != 4);
897 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_version) != 4);
898 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_version) != 4);
899 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_nid) != 8);
900 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_nid) != 8);
902 /* Checks for struct lnet_counters_common */
903 BUILD_BUG_ON((int)sizeof(struct lnet_counters_common) != 60);
904 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_alloc) != 0);
905 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_alloc) != 4);
906 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_max) != 4);
907 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_max) != 4);
908 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_errors) != 8);
909 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_errors) != 4);
910 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_count) != 12);
911 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_count) != 4);
912 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_count) != 16);
913 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_count) != 4);
914 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_count) != 20);
915 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_count) != 4);
916 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_count) != 24);
917 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_count) != 4);
918 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_length) != 28);
919 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_length) != 8);
920 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_length) != 36);
921 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_length) != 8);
922 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_length) != 44);
923 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_length) != 8);
924 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_length) != 52);
925 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_length) != 8);
928 static const struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
930 const struct lnet_lnd *lnd;
932 /* holding lnd mutex */
933 if (type >= NUM_LNDS)
935 lnd = the_lnet.ln_lnds[type];
936 LASSERT(!lnd || lnd->lnd_type == type);
942 lnet_get_lnd_timeout(void)
944 return lnet_lnd_timeout;
946 EXPORT_SYMBOL(lnet_get_lnd_timeout);
949 lnet_register_lnd(const struct lnet_lnd *lnd)
951 mutex_lock(&the_lnet.ln_lnd_mutex);
953 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
954 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
956 the_lnet.ln_lnds[lnd->lnd_type] = lnd;
958 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
960 mutex_unlock(&the_lnet.ln_lnd_mutex);
962 EXPORT_SYMBOL(lnet_register_lnd);
965 lnet_unregister_lnd(const struct lnet_lnd *lnd)
967 mutex_lock(&the_lnet.ln_lnd_mutex);
969 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
971 the_lnet.ln_lnds[lnd->lnd_type] = NULL;
972 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
974 mutex_unlock(&the_lnet.ln_lnd_mutex);
976 EXPORT_SYMBOL(lnet_unregister_lnd);
979 lnet_counters_get_common_locked(struct lnet_counters_common *common)
981 struct lnet_counters *ctr;
984 /* FIXME !!! Their is no assert_lnet_net_locked() to ensure this
985 * actually called under the protection of the lnet_net_lock.
987 memset(common, 0, sizeof(*common));
989 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
990 common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
991 common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
992 common->lcc_errors += ctr->lct_common.lcc_errors;
993 common->lcc_send_count += ctr->lct_common.lcc_send_count;
994 common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
995 common->lcc_route_count += ctr->lct_common.lcc_route_count;
996 common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
997 common->lcc_send_length += ctr->lct_common.lcc_send_length;
998 common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
999 common->lcc_route_length += ctr->lct_common.lcc_route_length;
1000 common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
1005 lnet_counters_get_common(struct lnet_counters_common *common)
1007 lnet_net_lock(LNET_LOCK_EX);
1008 lnet_counters_get_common_locked(common);
1009 lnet_net_unlock(LNET_LOCK_EX);
1011 EXPORT_SYMBOL(lnet_counters_get_common);
1014 lnet_counters_get(struct lnet_counters *counters)
1016 struct lnet_counters *ctr;
1017 struct lnet_counters_health *health = &counters->lct_health;
1020 memset(counters, 0, sizeof(*counters));
1022 lnet_net_lock(LNET_LOCK_EX);
1024 if (the_lnet.ln_state != LNET_STATE_RUNNING)
1025 GOTO(out_unlock, rc = -ENODEV);
1027 lnet_counters_get_common_locked(&counters->lct_common);
1029 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
1030 health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
1031 health->lch_resend_count += ctr->lct_health.lch_resend_count;
1032 health->lch_response_timeout_count +=
1033 ctr->lct_health.lch_response_timeout_count;
1034 health->lch_local_interrupt_count +=
1035 ctr->lct_health.lch_local_interrupt_count;
1036 health->lch_local_dropped_count +=
1037 ctr->lct_health.lch_local_dropped_count;
1038 health->lch_local_aborted_count +=
1039 ctr->lct_health.lch_local_aborted_count;
1040 health->lch_local_no_route_count +=
1041 ctr->lct_health.lch_local_no_route_count;
1042 health->lch_local_timeout_count +=
1043 ctr->lct_health.lch_local_timeout_count;
1044 health->lch_local_error_count +=
1045 ctr->lct_health.lch_local_error_count;
1046 health->lch_remote_dropped_count +=
1047 ctr->lct_health.lch_remote_dropped_count;
1048 health->lch_remote_error_count +=
1049 ctr->lct_health.lch_remote_error_count;
1050 health->lch_remote_timeout_count +=
1051 ctr->lct_health.lch_remote_timeout_count;
1052 health->lch_network_timeout_count +=
1053 ctr->lct_health.lch_network_timeout_count;
1056 lnet_net_unlock(LNET_LOCK_EX);
1059 EXPORT_SYMBOL(lnet_counters_get);
1062 lnet_counters_reset(void)
1064 struct lnet_counters *counters;
1067 lnet_net_lock(LNET_LOCK_EX);
1069 if (the_lnet.ln_state != LNET_STATE_RUNNING)
1072 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
1073 memset(counters, 0, sizeof(struct lnet_counters));
1075 lnet_net_unlock(LNET_LOCK_EX);
1079 lnet_res_type2str(int type)
1084 case LNET_COOKIE_TYPE_MD:
1086 case LNET_COOKIE_TYPE_ME:
1088 case LNET_COOKIE_TYPE_EQ:
1094 lnet_res_container_cleanup(struct lnet_res_container *rec)
1098 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
1101 while (!list_empty(&rec->rec_active)) {
1102 struct list_head *e = rec->rec_active.next;
1105 if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
1106 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
1108 } else { /* NB: Active MEs should be attached on portals */
1115 /* Found alive MD/ME/EQ, user really should unlink/free
1116 * all of them before finalize LNet, but if someone didn't,
1117 * we have to recycle garbage for him */
1118 CERROR("%d active elements on exit of %s container\n",
1119 count, lnet_res_type2str(rec->rec_type));
1122 if (rec->rec_lh_hash != NULL) {
1123 CFS_FREE_PTR_ARRAY(rec->rec_lh_hash, LNET_LH_HASH_SIZE);
1124 rec->rec_lh_hash = NULL;
1127 rec->rec_type = 0; /* mark it as finalized */
1131 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
1136 LASSERT(rec->rec_type == 0);
1138 rec->rec_type = type;
1139 INIT_LIST_HEAD(&rec->rec_active);
1141 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
1143 /* Arbitrary choice of hash table size */
1144 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
1145 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
1146 if (rec->rec_lh_hash == NULL) {
1151 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
1152 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
1157 CERROR("Failed to setup %s resource container\n",
1158 lnet_res_type2str(type));
1159 lnet_res_container_cleanup(rec);
1164 lnet_res_containers_destroy(struct lnet_res_container **recs)
1166 struct lnet_res_container *rec;
1169 cfs_percpt_for_each(rec, i, recs)
1170 lnet_res_container_cleanup(rec);
1172 cfs_percpt_free(recs);
1175 static struct lnet_res_container **
1176 lnet_res_containers_create(int type)
1178 struct lnet_res_container **recs;
1179 struct lnet_res_container *rec;
1183 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
1185 CERROR("Failed to allocate %s resource containers\n",
1186 lnet_res_type2str(type));
1190 cfs_percpt_for_each(rec, i, recs) {
1191 rc = lnet_res_container_setup(rec, i, type);
1193 lnet_res_containers_destroy(recs);
1201 struct lnet_libhandle *
1202 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
1204 /* ALWAYS called with lnet_res_lock held */
1205 struct list_head *head;
1206 struct lnet_libhandle *lh;
1209 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
1212 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
1213 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
1215 list_for_each_entry(lh, head, lh_hash_chain) {
1216 if (lh->lh_cookie == cookie)
1224 lnet_res_lh_initialize(struct lnet_res_container *rec,
1225 struct lnet_libhandle *lh)
1227 /* ALWAYS called with lnet_res_lock held */
1228 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
1231 lh->lh_cookie = rec->rec_lh_cookie;
1232 rec->rec_lh_cookie += 1 << ibits;
1234 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
1236 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
1240 lnet_create_array_of_queues(void)
1242 struct list_head **qs;
1243 struct list_head *q;
1246 qs = cfs_percpt_alloc(lnet_cpt_table(),
1247 sizeof(struct list_head));
1249 CERROR("Failed to allocate queues\n");
1253 cfs_percpt_for_each(q, i, qs)
1259 static int lnet_unprepare(void);
1262 lnet_prepare(lnet_pid_t requested_pid)
1264 /* Prepare to bring up the network */
1265 struct lnet_res_container **recs;
1268 if (requested_pid == LNET_PID_ANY) {
1269 /* Don't instantiate LNET just for me */
1273 LASSERT(the_lnet.ln_refcount == 0);
1275 the_lnet.ln_routing = 0;
1277 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
1278 the_lnet.ln_pid = requested_pid;
1280 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
1281 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
1282 INIT_LIST_HEAD(&the_lnet.ln_nets);
1283 INIT_LIST_HEAD(&the_lnet.ln_routers);
1284 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
1285 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
1286 INIT_LIST_HEAD(&the_lnet.ln_dc_request);
1287 INIT_LIST_HEAD(&the_lnet.ln_dc_working);
1288 INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
1289 INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
1290 INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
1291 INIT_LIST_HEAD(&the_lnet.ln_udsp_list);
1292 init_waitqueue_head(&the_lnet.ln_dc_waitq);
1293 the_lnet.ln_mt_handler = NULL;
1294 init_completion(&the_lnet.ln_started);
1296 rc = lnet_slab_setup();
1300 rc = lnet_create_remote_nets_table();
1305 * NB the interface cookie in wire handles guards against delayed
1306 * replies and ACKs appearing valid after reboot.
1308 the_lnet.ln_interface_cookie = ktime_get_real_ns();
1310 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
1311 sizeof(struct lnet_counters));
1312 if (the_lnet.ln_counters == NULL) {
1313 CERROR("Failed to allocate counters for LNet\n");
1318 rc = lnet_peer_tables_create();
1322 rc = lnet_msg_containers_create();
1326 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
1327 LNET_COOKIE_TYPE_EQ);
1331 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
1337 the_lnet.ln_md_containers = recs;
1339 rc = lnet_portals_create();
1341 CERROR("Failed to create portals for LNet: %d\n", rc);
1345 the_lnet.ln_mt_zombie_rstqs = lnet_create_array_of_queues();
1346 if (!the_lnet.ln_mt_zombie_rstqs) {
1359 lnet_unprepare (void)
1361 /* NB no LNET_LOCK since this is the last reference. All LND instances
1362 * have shut down already, so it is safe to unlink and free all
1363 * descriptors, even those that appear committed to a network op (eg MD
1364 * with non-zero pending count) */
1366 lnet_fail_nid(LNET_NID_ANY, 0);
1368 LASSERT(the_lnet.ln_refcount == 0);
1369 LASSERT(list_empty(&the_lnet.ln_test_peers));
1370 LASSERT(list_empty(&the_lnet.ln_nets));
1372 if (the_lnet.ln_mt_zombie_rstqs) {
1373 lnet_clean_zombie_rstqs();
1374 the_lnet.ln_mt_zombie_rstqs = NULL;
1377 lnet_assert_handler_unused(the_lnet.ln_mt_handler);
1378 the_lnet.ln_mt_handler = NULL;
1380 lnet_portals_destroy();
1382 if (the_lnet.ln_md_containers != NULL) {
1383 lnet_res_containers_destroy(the_lnet.ln_md_containers);
1384 the_lnet.ln_md_containers = NULL;
1387 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
1389 lnet_msg_containers_destroy();
1391 lnet_rtrpools_free(0);
1393 if (the_lnet.ln_counters != NULL) {
1394 cfs_percpt_free(the_lnet.ln_counters);
1395 the_lnet.ln_counters = NULL;
1397 lnet_destroy_remote_nets_table();
1398 lnet_udsp_destroy(true);
1399 lnet_slab_cleanup();
1405 lnet_net2ni_locked(__u32 net_id, int cpt)
1408 struct lnet_net *net;
1410 LASSERT(cpt != LNET_LOCK_EX);
1412 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1413 if (net->net_id == net_id) {
1414 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
1424 lnet_net2ni_addref(__u32 net)
1429 ni = lnet_net2ni_locked(net, 0);
1431 lnet_ni_addref_locked(ni, 0);
1436 EXPORT_SYMBOL(lnet_net2ni_addref);
1439 lnet_get_net_locked(__u32 net_id)
1441 struct lnet_net *net;
1443 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1444 if (net->net_id == net_id)
1452 lnet_net_clr_pref_rtrs(struct lnet_net *net)
1454 struct list_head zombies;
1455 struct lnet_nid_list *ne;
1456 struct lnet_nid_list *tmp;
1458 INIT_LIST_HEAD(&zombies);
1460 lnet_net_lock(LNET_LOCK_EX);
1461 list_splice_init(&net->net_rtr_pref_nids, &zombies);
1462 lnet_net_unlock(LNET_LOCK_EX);
1464 list_for_each_entry_safe(ne, tmp, &zombies, nl_list) {
1465 list_del_init(&ne->nl_list);
1466 LIBCFS_FREE(ne, sizeof(*ne));
1471 lnet_net_add_pref_rtr(struct lnet_net *net,
1473 __must_hold(&the_lnet.ln_api_mutex)
1475 struct lnet_nid_list *ne;
1477 /* This function is called with api_mutex held. When the api_mutex
1478 * is held the list can not be modified, as it is only modified as
1479 * a result of applying a UDSP and that happens under api_mutex
1482 list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
1483 if (ne->nl_nid == gw_nid)
1487 LIBCFS_ALLOC(ne, sizeof(*ne));
1491 ne->nl_nid = gw_nid;
1493 /* Lock the cpt to protect against addition and checks in the
1494 * selection algorithm
1496 lnet_net_lock(LNET_LOCK_EX);
1497 list_add(&ne->nl_list, &net->net_rtr_pref_nids);
1498 lnet_net_unlock(LNET_LOCK_EX);
1504 lnet_net_is_pref_rtr_locked(struct lnet_net *net, lnet_nid_t rtr_nid)
1506 struct lnet_nid_list *ne;
1508 CDEBUG(D_NET, "%s: rtr pref emtpy: %d\n",
1509 libcfs_net2str(net->net_id),
1510 list_empty(&net->net_rtr_pref_nids));
1512 if (list_empty(&net->net_rtr_pref_nids))
1515 list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
1516 CDEBUG(D_NET, "Comparing pref %s with gw %s\n",
1517 libcfs_nid2str(ne->nl_nid),
1518 libcfs_nid2str(rtr_nid));
1519 if (rtr_nid == ne->nl_nid)
1527 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
1532 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
1537 val = hash_long(key, LNET_CPT_BITS);
1538 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
1542 return (unsigned int)(key + val + (val >> 1)) % number;
1546 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
1548 struct lnet_net *net;
1550 /* must called with hold of lnet_net_lock */
1551 if (LNET_CPT_NUMBER == 1)
1552 return 0; /* the only one */
1555 * If NI is provided then use the CPT identified in the NI cpt
1556 * list if one exists. If one doesn't exist, then that NI is
1557 * associated with all CPTs and it follows that the net it belongs
1558 * to is implicitly associated with all CPTs, so just hash the nid
1562 if (ni->ni_cpts != NULL)
1563 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
1566 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1569 /* no NI provided so look at the net */
1570 net = lnet_get_net_locked(LNET_NIDNET(nid));
1572 if (net != NULL && net->net_cpts != NULL) {
1573 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
1576 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1580 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
1585 if (LNET_CPT_NUMBER == 1)
1586 return 0; /* the only one */
1588 cpt = lnet_net_lock_current();
1590 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
1592 lnet_net_unlock(cpt);
1596 EXPORT_SYMBOL(lnet_cpt_of_nid);
1599 lnet_islocalnet_locked(__u32 net_id)
1601 struct lnet_net *net;
1604 net = lnet_get_net_locked(net_id);
1606 local = net != NULL;
1612 lnet_islocalnet(__u32 net_id)
1617 cpt = lnet_net_lock_current();
1619 local = lnet_islocalnet_locked(net_id);
1621 lnet_net_unlock(cpt);
1627 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
1629 struct lnet_net *net;
1632 LASSERT(cpt != LNET_LOCK_EX);
1634 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1635 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1636 if (ni->ni_nid == nid)
1645 lnet_nid2ni_addref(lnet_nid_t nid)
1650 ni = lnet_nid2ni_locked(nid, 0);
1652 lnet_ni_addref_locked(ni, 0);
1657 EXPORT_SYMBOL(lnet_nid2ni_addref);
1660 lnet_islocalnid(lnet_nid_t nid)
1665 cpt = lnet_net_lock_current();
1666 ni = lnet_nid2ni_locked(nid, cpt);
1667 lnet_net_unlock(cpt);
1673 lnet_count_acceptor_nets(void)
1675 /* Return the # of NIs that need the acceptor. */
1677 struct lnet_net *net;
1680 cpt = lnet_net_lock_current();
1681 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1682 /* all socklnd type networks should have the acceptor
1684 if (net->net_lnd->lnd_accept != NULL)
1688 lnet_net_unlock(cpt);
1693 struct lnet_ping_buffer *
1694 lnet_ping_buffer_alloc(int nnis, gfp_t gfp)
1696 struct lnet_ping_buffer *pbuf;
1698 LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nnis), gfp);
1700 pbuf->pb_nnis = nnis;
1701 pbuf->pb_needs_post = false;
1702 atomic_set(&pbuf->pb_refcnt, 1);
1709 lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf)
1711 LASSERT(atomic_read(&pbuf->pb_refcnt) == 0);
1712 LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nnis));
1715 static struct lnet_ping_buffer *
1716 lnet_ping_target_create(int nnis)
1718 struct lnet_ping_buffer *pbuf;
1720 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1722 CERROR("Can't allocate ping source [%d]\n", nnis);
1726 pbuf->pb_info.pi_nnis = nnis;
1727 pbuf->pb_info.pi_pid = the_lnet.ln_pid;
1728 pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
1729 pbuf->pb_info.pi_features =
1730 LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
1736 lnet_get_net_ni_count_locked(struct lnet_net *net)
1741 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1748 lnet_get_net_ni_count_pre(struct lnet_net *net)
1753 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1760 lnet_get_ni_count(void)
1763 struct lnet_net *net;
1768 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1769 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1779 lnet_get_net_count(void)
1781 struct lnet_net *net;
1786 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1796 lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
1798 struct lnet_ni_status *stat;
1802 __swab32s(&pbuf->pb_info.pi_magic);
1803 __swab32s(&pbuf->pb_info.pi_features);
1804 __swab32s(&pbuf->pb_info.pi_pid);
1805 __swab32s(&pbuf->pb_info.pi_nnis);
1806 nnis = pbuf->pb_info.pi_nnis;
1807 if (nnis > pbuf->pb_nnis)
1808 nnis = pbuf->pb_nnis;
1809 for (i = 0; i < nnis; i++) {
1810 stat = &pbuf->pb_info.pi_ni[i];
1811 __swab64s(&stat->ns_nid);
1812 __swab32s(&stat->ns_status);
1817 lnet_ping_info_validate(struct lnet_ping_info *pinfo)
1821 if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
1823 if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
1825 /* Loopback is guaranteed to be present */
1826 if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
1828 if (LNET_PING_INFO_LONI(pinfo) != LNET_NID_LO_0)
1834 lnet_ping_target_destroy(void)
1836 struct lnet_net *net;
1839 lnet_net_lock(LNET_LOCK_EX);
1841 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1842 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1844 ni->ni_status = NULL;
1849 lnet_ping_buffer_decref(the_lnet.ln_ping_target);
1850 the_lnet.ln_ping_target = NULL;
1852 lnet_net_unlock(LNET_LOCK_EX);
1856 lnet_ping_target_event_handler(struct lnet_event *event)
1858 struct lnet_ping_buffer *pbuf = event->md_user_ptr;
1860 if (event->unlinked)
1861 lnet_ping_buffer_decref(pbuf);
1865 lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
1866 struct lnet_handle_md *ping_mdh,
1867 int ni_count, bool set_eq)
1869 struct lnet_process_id id = {
1870 .nid = LNET_NID_ANY,
1874 struct lnet_md md = { NULL };
1878 the_lnet.ln_ping_target_handler =
1879 lnet_ping_target_event_handler;
1881 *ppbuf = lnet_ping_target_create(ni_count);
1882 if (*ppbuf == NULL) {
1887 /* Ping target ME/MD */
1888 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1889 LNET_PROTO_PING_MATCHBITS, 0,
1890 LNET_UNLINK, LNET_INS_AFTER);
1893 CERROR("Can't create ping target ME: %d\n", rc);
1894 goto fail_decref_ping_buffer;
1897 /* initialize md content */
1898 md.start = &(*ppbuf)->pb_info;
1899 md.length = LNET_PING_INFO_SIZE((*ppbuf)->pb_nnis);
1900 md.threshold = LNET_MD_THRESH_INF;
1902 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1903 LNET_MD_MANAGE_REMOTE;
1904 md.handler = the_lnet.ln_ping_target_handler;
1905 md.user_ptr = *ppbuf;
1907 rc = LNetMDAttach(me, &md, LNET_RETAIN, ping_mdh);
1909 CERROR("Can't attach ping target MD: %d\n", rc);
1910 goto fail_decref_ping_buffer;
1912 lnet_ping_buffer_addref(*ppbuf);
1916 fail_decref_ping_buffer:
1917 LASSERT(atomic_read(&(*ppbuf)->pb_refcnt) == 1);
1918 lnet_ping_buffer_decref(*ppbuf);
1925 lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
1926 struct lnet_handle_md *ping_mdh)
1928 LNetMDUnlink(*ping_mdh);
1929 LNetInvalidateMDHandle(ping_mdh);
1931 /* NB the MD could be busy; this just starts the unlink */
1932 wait_var_event_warning(&pbuf->pb_refcnt,
1933 atomic_read(&pbuf->pb_refcnt) <= 1,
1934 "Still waiting for ping data MD to unlink\n");
1938 lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
1941 struct lnet_net *net;
1942 struct lnet_ni_status *ns;
1947 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1948 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1949 LASSERT(i < pbuf->pb_nnis);
1951 ns = &pbuf->pb_info.pi_ni[i];
1953 ns->ns_nid = ni->ni_nid;
1956 ns->ns_status = (ni->ni_status != NULL) ?
1957 ni->ni_status->ns_status :
1966 * We (ab)use the ns_status of the loopback interface to
1967 * transmit the sequence number. The first interface listed
1968 * must be the loopback interface.
1970 rc = lnet_ping_info_validate(&pbuf->pb_info);
1972 LCONSOLE_EMERG("Invalid ping target: %d\n", rc);
1975 LNET_PING_BUFFER_SEQNO(pbuf) =
1976 atomic_inc_return(&the_lnet.ln_ping_target_seqno);
1980 lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
1981 struct lnet_handle_md ping_mdh)
1983 struct lnet_ping_buffer *old_pbuf = NULL;
1984 struct lnet_handle_md old_ping_md;
1986 /* switch the NIs to point to the new ping info created */
1987 lnet_net_lock(LNET_LOCK_EX);
1989 if (!the_lnet.ln_routing)
1990 pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1991 if (!lnet_peer_discovery_disabled)
1992 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
1994 /* Ensure only known feature bits have been set. */
1995 LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
1996 LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
1998 lnet_ping_target_install_locked(pbuf);
2000 if (the_lnet.ln_ping_target) {
2001 old_pbuf = the_lnet.ln_ping_target;
2002 old_ping_md = the_lnet.ln_ping_target_md;
2004 the_lnet.ln_ping_target_md = ping_mdh;
2005 the_lnet.ln_ping_target = pbuf;
2007 lnet_net_unlock(LNET_LOCK_EX);
2010 /* unlink and free the old ping info */
2011 lnet_ping_md_unlink(old_pbuf, &old_ping_md);
2012 lnet_ping_buffer_decref(old_pbuf);
2015 lnet_push_update_to_peers(0);
2019 lnet_ping_target_fini(void)
2021 lnet_ping_md_unlink(the_lnet.ln_ping_target,
2022 &the_lnet.ln_ping_target_md);
2024 lnet_assert_handler_unused(the_lnet.ln_ping_target_handler);
2025 lnet_ping_target_destroy();
2028 /* Resize the push target. */
2029 int lnet_push_target_resize(void)
2031 struct lnet_handle_md mdh;
2032 struct lnet_handle_md old_mdh;
2033 struct lnet_ping_buffer *pbuf;
2034 struct lnet_ping_buffer *old_pbuf;
2039 nnis = the_lnet.ln_push_target_nnis;
2041 CDEBUG(D_NET, "Invalid nnis %d\n", nnis);
2045 /* NB: lnet_ping_buffer_alloc() sets pbuf refcount to 1. That ref is
2046 * dropped when we need to resize again (see "old_pbuf" below) or when
2047 * LNet is shutdown (see lnet_push_target_fini())
2049 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
2051 CDEBUG(D_NET, "Can't allocate pbuf for nnis %d\n", nnis);
2055 rc = lnet_push_target_post(pbuf, &mdh);
2057 CDEBUG(D_NET, "Failed to post push target: %d\n", rc);
2058 lnet_ping_buffer_decref(pbuf);
2062 lnet_net_lock(LNET_LOCK_EX);
2063 old_pbuf = the_lnet.ln_push_target;
2064 old_mdh = the_lnet.ln_push_target_md;
2065 the_lnet.ln_push_target = pbuf;
2066 the_lnet.ln_push_target_md = mdh;
2067 lnet_net_unlock(LNET_LOCK_EX);
2070 LNetMDUnlink(old_mdh);
2071 /* Drop ref set by lnet_ping_buffer_alloc() */
2072 lnet_ping_buffer_decref(old_pbuf);
2075 /* Received another push or reply that requires a larger buffer */
2076 if (nnis < the_lnet.ln_push_target_nnis)
2079 CDEBUG(D_NET, "nnis %d success\n", nnis);
2083 int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
2084 struct lnet_handle_md *mdhp)
2086 struct lnet_process_id id = { LNET_NID_ANY, LNET_PID_ANY };
2087 struct lnet_md md = { NULL };
2091 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
2092 LNET_PROTO_PING_MATCHBITS, 0,
2093 LNET_UNLINK, LNET_INS_AFTER);
2096 CERROR("Can't create push target ME: %d\n", rc);
2100 pbuf->pb_needs_post = false;
2102 /* This reference is dropped by lnet_push_target_event_handler() */
2103 lnet_ping_buffer_addref(pbuf);
2105 /* initialize md content */
2106 md.start = &pbuf->pb_info;
2107 md.length = LNET_PING_INFO_SIZE(pbuf->pb_nnis);
2110 md.options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE;
2112 md.handler = the_lnet.ln_push_target_handler;
2114 rc = LNetMDAttach(me, &md, LNET_UNLINK, mdhp);
2116 CERROR("Can't attach push MD: %d\n", rc);
2117 lnet_ping_buffer_decref(pbuf);
2118 pbuf->pb_needs_post = true;
2122 CDEBUG(D_NET, "posted push target %p\n", pbuf);
2127 static void lnet_push_target_event_handler(struct lnet_event *ev)
2129 struct lnet_ping_buffer *pbuf = ev->md_user_ptr;
2131 CDEBUG(D_NET, "type %d status %d unlinked %d\n", ev->type, ev->status,
2134 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
2135 lnet_swap_pinginfo(pbuf);
2137 if (ev->type == LNET_EVENT_UNLINK) {
2138 /* Drop ref added by lnet_push_target_post() */
2139 lnet_ping_buffer_decref(pbuf);
2143 lnet_peer_push_event(ev);
2145 /* Drop ref added by lnet_push_target_post */
2146 lnet_ping_buffer_decref(pbuf);
2149 /* Initialize the push target. */
2150 static int lnet_push_target_init(void)
2154 if (the_lnet.ln_push_target)
2157 the_lnet.ln_push_target_handler =
2158 lnet_push_target_event_handler;
2160 rc = LNetSetLazyPortal(LNET_RESERVED_PORTAL);
2163 /* Start at the required minimum, we'll enlarge if required. */
2164 the_lnet.ln_push_target_nnis = LNET_INTERFACES_MIN;
2166 rc = lnet_push_target_resize();
2169 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2170 the_lnet.ln_push_target_handler = NULL;
2176 /* Clean up the push target. */
2177 static void lnet_push_target_fini(void)
2179 if (!the_lnet.ln_push_target)
2182 /* Unlink and invalidate to prevent new references. */
2183 LNetMDUnlink(the_lnet.ln_push_target_md);
2184 LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
2186 /* Wait for the unlink to complete. */
2187 wait_var_event_warning(&the_lnet.ln_push_target->pb_refcnt,
2188 atomic_read(&the_lnet.ln_push_target->pb_refcnt) <= 1,
2189 "Still waiting for ping data MD to unlink\n");
2191 /* Drop ref set by lnet_ping_buffer_alloc() */
2192 lnet_ping_buffer_decref(the_lnet.ln_push_target);
2193 the_lnet.ln_push_target = NULL;
2194 the_lnet.ln_push_target_nnis = 0;
2196 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2197 lnet_assert_handler_unused(the_lnet.ln_push_target_handler);
2198 the_lnet.ln_push_target_handler = NULL;
2202 lnet_ni_tq_credits(struct lnet_ni *ni)
2206 LASSERT(ni->ni_ncpts >= 1);
2208 if (ni->ni_ncpts == 1)
2209 return ni->ni_net->net_tunables.lct_max_tx_credits;
2211 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
2212 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
2213 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
2219 lnet_ni_unlink_locked(struct lnet_ni *ni)
2221 /* move it to zombie list and nobody can find it anymore */
2222 LASSERT(!list_empty(&ni->ni_netlist));
2223 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
2224 lnet_ni_decref_locked(ni, 0);
2228 lnet_clear_zombies_nis_locked(struct lnet_net *net)
2233 struct list_head *zombie_list = &net->net_ni_zombie;
2236 * Now wait for the NIs I just nuked to show up on the zombie
2237 * list and shut them down in guaranteed thread context
2240 while (!list_empty(zombie_list)) {
2244 ni = list_entry(zombie_list->next,
2245 struct lnet_ni, ni_netlist);
2246 list_del_init(&ni->ni_netlist);
2247 /* the ni should be in deleting state. If it's not it's
2249 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
2250 cfs_percpt_for_each(ref, j, ni->ni_refs) {
2253 /* still busy, add it back to zombie list */
2254 list_add(&ni->ni_netlist, zombie_list);
2258 if (!list_empty(&ni->ni_netlist)) {
2259 /* Unlock mutex while waiting to allow other
2260 * threads to read the LNet state and fall through
2263 lnet_net_unlock(LNET_LOCK_EX);
2264 mutex_unlock(&the_lnet.ln_api_mutex);
2267 if ((i & (-i)) == i) {
2269 "Waiting for zombie LNI %s\n",
2270 libcfs_nid2str(ni->ni_nid));
2272 schedule_timeout_uninterruptible(cfs_time_seconds(1));
2274 mutex_lock(&the_lnet.ln_api_mutex);
2275 lnet_net_lock(LNET_LOCK_EX);
2279 lnet_net_unlock(LNET_LOCK_EX);
2281 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
2283 LASSERT(!in_interrupt());
2284 /* Holding the mutex makes it safe for lnd_shutdown
2285 * to call module_put(). Module unload cannot finish
2286 * until lnet_unregister_lnd() completes, and that
2287 * requires the mutex.
2289 mutex_lock(&the_lnet.ln_lnd_mutex);
2290 (net->net_lnd->lnd_shutdown)(ni);
2291 mutex_unlock(&the_lnet.ln_lnd_mutex);
2294 CDEBUG(D_LNI, "Removed LNI %s\n",
2295 libcfs_nid2str(ni->ni_nid));
2299 lnet_net_lock(LNET_LOCK_EX);
2303 /* shutdown down the NI and release refcount */
2305 lnet_shutdown_lndni(struct lnet_ni *ni)
2308 struct lnet_net *net = ni->ni_net;
2310 lnet_net_lock(LNET_LOCK_EX);
2312 ni->ni_state = LNET_NI_STATE_DELETING;
2314 lnet_ni_unlink_locked(ni);
2315 lnet_incr_dlc_seq();
2316 lnet_net_unlock(LNET_LOCK_EX);
2318 /* clear messages for this NI on the lazy portal */
2319 for (i = 0; i < the_lnet.ln_nportals; i++)
2320 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
2322 lnet_net_lock(LNET_LOCK_EX);
2323 lnet_clear_zombies_nis_locked(net);
2324 lnet_net_unlock(LNET_LOCK_EX);
2328 lnet_shutdown_lndnet(struct lnet_net *net)
2332 lnet_net_lock(LNET_LOCK_EX);
2334 list_del_init(&net->net_list);
2336 while (!list_empty(&net->net_ni_list)) {
2337 ni = list_entry(net->net_ni_list.next,
2338 struct lnet_ni, ni_netlist);
2339 lnet_net_unlock(LNET_LOCK_EX);
2340 lnet_shutdown_lndni(ni);
2341 lnet_net_lock(LNET_LOCK_EX);
2344 lnet_net_unlock(LNET_LOCK_EX);
2346 /* Do peer table cleanup for this net */
2347 lnet_peer_tables_cleanup(net);
2353 lnet_shutdown_lndnets(void)
2355 struct lnet_net *net;
2357 struct lnet_msg *msg, *tmp;
2359 /* NB called holding the global mutex */
2361 /* All quiet on the API front */
2362 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
2363 LASSERT(the_lnet.ln_refcount == 0);
2365 lnet_net_lock(LNET_LOCK_EX);
2366 the_lnet.ln_state = LNET_STATE_STOPPING;
2369 * move the nets to the zombie list to avoid them being
2370 * picked up for new work. LONET is also included in the
2371 * Nets that will be moved to the zombie list
2373 list_splice_init(&the_lnet.ln_nets, &the_lnet.ln_net_zombie);
2375 /* Drop the cached loopback Net. */
2376 if (the_lnet.ln_loni != NULL) {
2377 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
2378 the_lnet.ln_loni = NULL;
2380 lnet_net_unlock(LNET_LOCK_EX);
2382 /* iterate through the net zombie list and delete each net */
2383 while (!list_empty(&the_lnet.ln_net_zombie)) {
2384 net = list_entry(the_lnet.ln_net_zombie.next,
2385 struct lnet_net, net_list);
2386 lnet_shutdown_lndnet(net);
2389 spin_lock(&the_lnet.ln_msg_resend_lock);
2390 list_splice(&the_lnet.ln_msg_resend, &resend);
2391 spin_unlock(&the_lnet.ln_msg_resend_lock);
2393 list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
2394 list_del_init(&msg->msg_list);
2395 msg->msg_no_resend = true;
2396 lnet_finalize(msg, -ECANCELED);
2399 lnet_net_lock(LNET_LOCK_EX);
2400 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
2401 lnet_net_unlock(LNET_LOCK_EX);
2405 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
2408 struct lnet_tx_queue *tq;
2410 struct lnet_net *net = ni->ni_net;
2412 mutex_lock(&the_lnet.ln_lnd_mutex);
2415 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
2416 ni->ni_lnd_tunables_set = true;
2419 rc = (net->net_lnd->lnd_startup)(ni);
2421 mutex_unlock(&the_lnet.ln_lnd_mutex);
2424 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
2425 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
2430 ni->ni_state = LNET_NI_STATE_ACTIVE;
2433 /* We keep a reference on the loopback net through the loopback NI */
2434 if (net->net_lnd->lnd_type == LOLND) {
2436 LASSERT(the_lnet.ln_loni == NULL);
2437 the_lnet.ln_loni = ni;
2438 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
2439 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
2440 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
2441 ni->ni_net->net_tunables.lct_peer_timeout = 0;
2445 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
2446 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
2447 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
2448 libcfs_lnd2str(net->net_lnd->lnd_type),
2449 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
2451 /* shutdown the NI since if we get here then it must've already
2454 lnet_shutdown_lndni(ni);
2458 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
2459 tq->tq_credits_min =
2460 tq->tq_credits_max =
2461 tq->tq_credits = lnet_ni_tq_credits(ni);
2464 atomic_set(&ni->ni_tx_credits,
2465 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
2466 atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
2468 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
2469 libcfs_nid2str(ni->ni_nid),
2470 ni->ni_net->net_tunables.lct_peer_tx_credits,
2471 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
2472 ni->ni_net->net_tunables.lct_peer_rtr_credits,
2473 ni->ni_net->net_tunables.lct_peer_timeout);
2482 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
2485 struct lnet_net *net_l = NULL;
2486 LIST_HEAD(local_ni_list);
2490 const struct lnet_lnd *lnd;
2492 net->net_tunables.lct_peer_timeout;
2494 net->net_tunables.lct_max_tx_credits;
2495 int peerrtrcredits =
2496 net->net_tunables.lct_peer_rtr_credits;
2499 * make sure that this net is unique. If it isn't then
2500 * we are adding interfaces to an already existing network, and
2501 * 'net' is just a convenient way to pass in the list.
2502 * if it is unique we need to find the LND and load it if
2505 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
2506 lnd_type = LNET_NETTYP(net->net_id);
2508 mutex_lock(&the_lnet.ln_lnd_mutex);
2509 lnd = lnet_find_lnd_by_type(lnd_type);
2512 mutex_unlock(&the_lnet.ln_lnd_mutex);
2513 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
2514 mutex_lock(&the_lnet.ln_lnd_mutex);
2516 lnd = lnet_find_lnd_by_type(lnd_type);
2518 mutex_unlock(&the_lnet.ln_lnd_mutex);
2519 CERROR("Can't load LND %s, module %s, rc=%d\n",
2520 libcfs_lnd2str(lnd_type),
2521 libcfs_lnd2modname(lnd_type), rc);
2522 #ifndef HAVE_MODULE_LOADING_SUPPORT
2523 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
2524 "compiled with kernel module "
2525 "loading support.");
2534 mutex_unlock(&the_lnet.ln_lnd_mutex);
2540 * net_l: if the network being added is unique then net_l
2541 * will point to that network
2542 * if the network being added is not unique then
2543 * net_l points to the existing network.
2545 * When we enter the loop below, we'll pick NIs off he
2546 * network beign added and start them up, then add them to
2547 * a local ni list. Once we've successfully started all
2548 * the NIs then we join the local NI list (of started up
2549 * networks) with the net_l->net_ni_list, which should
2550 * point to the correct network to add the new ni list to
2552 * If any of the new NIs fail to start up, then we want to
2553 * iterate through the local ni list, which should include
2554 * any NIs which were successfully started up, and shut
2557 * After than we want to delete the network being added,
2558 * to avoid a memory leak.
2560 while (!list_empty(&net->net_ni_added)) {
2561 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
2563 list_del_init(&ni->ni_netlist);
2565 /* make sure that the the NI we're about to start
2566 * up is actually unique. if it's not fail. */
2567 if (!lnet_ni_unique_net(&net_l->net_ni_list,
2568 ni->ni_interface)) {
2573 /* adjust the pointer the parent network, just in case it
2574 * the net is a duplicate */
2577 rc = lnet_startup_lndni(ni, tun);
2583 list_add_tail(&ni->ni_netlist, &local_ni_list);
2588 lnet_net_lock(LNET_LOCK_EX);
2589 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
2590 lnet_incr_dlc_seq();
2591 lnet_net_unlock(LNET_LOCK_EX);
2593 /* if the network is not unique then we don't want to keep
2594 * it around after we're done. Free it. Otherwise add that
2595 * net to the global the_lnet.ln_nets */
2596 if (net_l != net && net_l != NULL) {
2598 * TODO - note. currently the tunables can not be updated
2604 * restore tunables after it has been overwitten by the
2607 if (peer_timeout != -1)
2608 net->net_tunables.lct_peer_timeout = peer_timeout;
2609 if (maxtxcredits != -1)
2610 net->net_tunables.lct_max_tx_credits = maxtxcredits;
2611 if (peerrtrcredits != -1)
2612 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
2614 lnet_net_lock(LNET_LOCK_EX);
2615 list_add_tail(&net->net_list, &the_lnet.ln_nets);
2616 lnet_net_unlock(LNET_LOCK_EX);
2619 /* update net count */
2620 lnet_current_net_count = lnet_get_net_count();
2626 * shutdown the new NIs that are being started up
2627 * free the NET being started
2629 while (!list_empty(&local_ni_list)) {
2630 ni = list_entry(local_ni_list.next, struct lnet_ni,
2633 lnet_shutdown_lndni(ni);
2643 lnet_startup_lndnets(struct list_head *netlist)
2645 struct lnet_net *net;
2650 * Change to running state before bringing up the LNDs. This
2651 * allows lnet_shutdown_lndnets() to assert that we've passed
2654 lnet_net_lock(LNET_LOCK_EX);
2655 the_lnet.ln_state = LNET_STATE_RUNNING;
2656 lnet_net_unlock(LNET_LOCK_EX);
2658 while (!list_empty(netlist)) {
2659 net = list_entry(netlist->next, struct lnet_net, net_list);
2660 list_del_init(&net->net_list);
2662 rc = lnet_startup_lndnet(net, NULL);
2672 lnet_shutdown_lndnets();
2678 * Initialize LNet library.
2680 * Automatically called at module loading time. Caller has to call
2681 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
2682 * latter returned 0. It must be called exactly once.
2684 * \retval 0 on success
2685 * \retval -ve on failures.
2687 int lnet_lib_init(void)
2691 lnet_assert_wire_constants();
2693 /* refer to global cfs_cpt_table for now */
2694 the_lnet.ln_cpt_table = cfs_cpt_tab;
2695 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_tab);
2697 LASSERT(the_lnet.ln_cpt_number > 0);
2698 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
2699 /* we are under risk of consuming all lh_cookie */
2700 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
2701 "please change setting of CPT-table and retry\n",
2702 the_lnet.ln_cpt_number, LNET_CPT_MAX);
2706 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
2707 the_lnet.ln_cpt_bits++;
2709 rc = lnet_create_locks();
2711 CERROR("Can't create LNet global locks: %d\n", rc);
2715 the_lnet.ln_refcount = 0;
2716 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
2717 INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
2719 /* The hash table size is the number of bits it takes to express the set
2720 * ln_num_routes, minus 1 (better to under estimate than over so we
2721 * don't waste memory). */
2722 if (rnet_htable_size <= 0)
2723 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
2724 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
2725 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
2726 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
2727 order_base_2(rnet_htable_size) - 1);
2729 /* All LNDs apart from the LOLND are in separate modules. They
2730 * register themselves when their module loads, and unregister
2731 * themselves when their module is unloaded. */
2732 lnet_register_lnd(&the_lolnd);
2737 * Finalize LNet library.
2739 * \pre lnet_lib_init() called with success.
2740 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
2742 * As this happens at module-unload, all lnds must already be unloaded,
2743 * so they must already be unregistered.
2745 void lnet_lib_exit(void)
2749 LASSERT(the_lnet.ln_refcount == 0);
2750 lnet_unregister_lnd(&the_lolnd);
2751 for (i = 0; i < NUM_LNDS; i++)
2752 LASSERT(!the_lnet.ln_lnds[i]);
2753 lnet_destroy_locks();
2757 * Set LNet PID and start LNet interfaces, routing, and forwarding.
2759 * Users must call this function at least once before any other functions.
2760 * For each successful call there must be a corresponding call to
2761 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
2764 * The PID used by LNet may be different from the one requested.
2767 * \param requested_pid PID requested by the caller.
2769 * \return >= 0 on success, and < 0 error code on failures.
2772 LNetNIInit(lnet_pid_t requested_pid)
2774 int im_a_router = 0;
2777 struct lnet_ping_buffer *pbuf;
2778 struct lnet_handle_md ping_mdh;
2779 LIST_HEAD(net_head);
2780 struct lnet_net *net;
2782 mutex_lock(&the_lnet.ln_api_mutex);
2784 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
2786 if (the_lnet.ln_refcount > 0) {
2787 rc = the_lnet.ln_refcount++;
2788 mutex_unlock(&the_lnet.ln_api_mutex);
2792 rc = lnet_prepare(requested_pid);
2794 mutex_unlock(&the_lnet.ln_api_mutex);
2798 /* create a network for Loopback network */
2799 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
2802 goto err_empty_list;
2805 /* Add in the loopback NI */
2806 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
2808 goto err_empty_list;
2811 if (use_tcp_bonding)
2812 CWARN("use_tcp_bonding has been removed. Use Multi-Rail and Dynamic Discovery instead, see LU-13641\n");
2814 /* If LNet is being initialized via DLC it is possible
2815 * that the user requests not to load module parameters (ones which
2816 * are supported by DLC) on initialization. Therefore, make sure not
2817 * to load networks, routes and forwarding from module parameters
2818 * in this case. On cleanup in case of failure only clean up
2819 * routes if it has been loaded */
2820 if (!the_lnet.ln_nis_from_mod_params) {
2821 rc = lnet_parse_networks(&net_head, lnet_get_networks());
2823 goto err_empty_list;
2826 ni_count = lnet_startup_lndnets(&net_head);
2829 goto err_empty_list;
2832 if (!the_lnet.ln_nis_from_mod_params) {
2833 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
2835 goto err_shutdown_lndnis;
2837 rc = lnet_rtrpools_alloc(im_a_router);
2839 goto err_destroy_routes;
2842 rc = lnet_acceptor_start();
2844 goto err_destroy_routes;
2846 the_lnet.ln_refcount = 1;
2847 /* Now I may use my own API functions... */
2849 rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_count, true);
2851 goto err_acceptor_stop;
2853 lnet_ping_target_update(pbuf, ping_mdh);
2855 the_lnet.ln_mt_handler = lnet_mt_event_handler;
2857 rc = lnet_push_target_init();
2861 rc = lnet_peer_discovery_start();
2863 goto err_destroy_push_target;
2865 rc = lnet_monitor_thr_start();
2867 goto err_stop_discovery_thr;
2870 lnet_router_debugfs_init();
2872 mutex_unlock(&the_lnet.ln_api_mutex);
2874 complete_all(&the_lnet.ln_started);
2876 /* wait for all routers to start */
2877 lnet_wait_router_start();
2881 err_stop_discovery_thr:
2882 lnet_peer_discovery_stop();
2883 err_destroy_push_target:
2884 lnet_push_target_fini();
2886 lnet_ping_target_fini();
2888 the_lnet.ln_refcount = 0;
2889 lnet_acceptor_stop();
2891 if (!the_lnet.ln_nis_from_mod_params)
2892 lnet_destroy_routes();
2893 err_shutdown_lndnis:
2894 lnet_shutdown_lndnets();
2898 mutex_unlock(&the_lnet.ln_api_mutex);
2899 while (!list_empty(&net_head)) {
2900 struct lnet_net *net;
2902 net = list_entry(net_head.next, struct lnet_net, net_list);
2903 list_del_init(&net->net_list);
2908 EXPORT_SYMBOL(LNetNIInit);
2911 * Stop LNet interfaces, routing, and forwarding.
2913 * Users must call this function once for each successful call to LNetNIInit().
2914 * Once the LNetNIFini() operation has been started, the results of pending
2915 * API operations are undefined.
2917 * \return always 0 for current implementation.
2922 mutex_lock(&the_lnet.ln_api_mutex);
2924 LASSERT(the_lnet.ln_refcount > 0);
2926 if (the_lnet.ln_refcount != 1) {
2927 the_lnet.ln_refcount--;
2929 LASSERT(!the_lnet.ln_niinit_self);
2933 lnet_router_debugfs_fini();
2934 lnet_monitor_thr_stop();
2935 lnet_peer_discovery_stop();
2936 lnet_push_target_fini();
2937 lnet_ping_target_fini();
2939 /* Teardown fns that use my own API functions BEFORE here */
2940 the_lnet.ln_refcount = 0;
2942 lnet_acceptor_stop();
2943 lnet_destroy_routes();
2944 lnet_shutdown_lndnets();
2948 mutex_unlock(&the_lnet.ln_api_mutex);
2951 EXPORT_SYMBOL(LNetNIFini);
2954 * Grabs the ni data from the ni structure and fills the out
2957 * \param[in] ni network interface structure
2958 * \param[out] cfg_ni NI config information
2959 * \param[out] tun network and LND tunables
2962 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
2963 struct lnet_ioctl_config_lnd_tunables *tun,
2964 struct lnet_ioctl_element_stats *stats,
2967 size_t min_size = 0;
2970 if (!ni || !cfg_ni || !tun)
2973 if (ni->ni_interface != NULL) {
2974 strncpy(cfg_ni->lic_ni_intf,
2976 sizeof(cfg_ni->lic_ni_intf));
2979 cfg_ni->lic_nid = ni->ni_nid;
2980 if (ni->ni_nid == LNET_NID_LO_0)
2981 cfg_ni->lic_status = LNET_NI_STATUS_UP;
2983 cfg_ni->lic_status = ni->ni_status->ns_status;
2984 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
2986 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
2989 stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
2990 LNET_STATS_TYPE_SEND);
2991 stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
2992 LNET_STATS_TYPE_RECV);
2993 stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
2994 LNET_STATS_TYPE_DROP);
2998 * tun->lt_tun will always be present, but in order to be
2999 * backwards compatible, we need to deal with the cases when
3000 * tun->lt_tun is smaller than what the kernel has, because it
3001 * comes from an older version of a userspace program, then we'll
3002 * need to copy as much information as we have available space.
3004 min_size = tun_size - sizeof(tun->lt_cmn);
3005 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
3007 /* copy over the cpts */
3008 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
3009 ni->ni_cpts == NULL) {
3010 for (i = 0; i < ni->ni_ncpts; i++)
3011 cfg_ni->lic_cpts[i] = i;
3014 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
3015 i < LNET_MAX_SHOW_NUM_CPT;
3017 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
3019 cfg_ni->lic_ncpts = ni->ni_ncpts;
3023 * NOTE: This is a legacy function left in the code to be backwards
3024 * compatible with older userspace programs. It should eventually be
3027 * Grabs the ni data from the ni structure and fills the out
3030 * \param[in] ni network interface structure
3031 * \param[out] config config information
3034 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
3035 struct lnet_ioctl_config_data *config)
3037 struct lnet_ioctl_net_config *net_config;
3038 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
3039 size_t min_size, tunable_size = 0;
3045 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
3049 if (!ni->ni_interface)
3052 strncpy(net_config->ni_interface,
3054 sizeof(net_config->ni_interface));
3056 config->cfg_nid = ni->ni_nid;
3057 config->cfg_config_u.cfg_net.net_peer_timeout =
3058 ni->ni_net->net_tunables.lct_peer_timeout;
3059 config->cfg_config_u.cfg_net.net_max_tx_credits =
3060 ni->ni_net->net_tunables.lct_max_tx_credits;
3061 config->cfg_config_u.cfg_net.net_peer_tx_credits =
3062 ni->ni_net->net_tunables.lct_peer_tx_credits;
3063 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
3064 ni->ni_net->net_tunables.lct_peer_rtr_credits;
3066 if (ni->ni_nid == LNET_NID_LO_0)
3067 net_config->ni_status = LNET_NI_STATUS_UP;
3069 net_config->ni_status = ni->ni_status->ns_status;
3072 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
3074 for (i = 0; i < num_cpts; i++)
3075 net_config->ni_cpts[i] = ni->ni_cpts[i];
3077 config->cfg_ncpts = num_cpts;
3081 * See if user land tools sent in a newer and larger version
3082 * of struct lnet_tunables than what the kernel uses.
3084 min_size = sizeof(*config) + sizeof(*net_config);
3086 if (config->cfg_hdr.ioc_len > min_size)
3087 tunable_size = config->cfg_hdr.ioc_len - min_size;
3089 /* Don't copy too much data to user space */
3090 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
3091 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
3093 if (lnd_cfg && min_size) {
3094 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
3095 config->cfg_config_u.cfg_net.net_interface_count = 1;
3097 /* Tell user land that kernel side has less data */
3098 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
3099 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
3100 config->cfg_hdr.ioc_len -= min_size;
3106 lnet_get_ni_idx_locked(int idx)
3109 struct lnet_net *net;
3111 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3112 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3121 int lnet_get_net_healthv_locked(struct lnet_net *net)
3124 int best_healthv = 0;
3127 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3128 healthv = atomic_read(&ni->ni_healthv);
3129 if (healthv > best_healthv)
3130 best_healthv = healthv;
3133 return best_healthv;
3137 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
3140 struct lnet_net *net = mynet;
3143 * It is possible that the net has been cleaned out while there is
3144 * a message being sent. This function accessed the net without
3145 * checking if the list is empty
3149 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
3151 if (list_empty(&net->net_ni_list))
3153 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3159 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
3160 /* if you reached the end of the ni list and the net is
3161 * specified, then there are no more nis in that net */
3165 /* we reached the end of this net ni list. move to the
3167 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
3168 /* no more nets and no more NIs. */
3171 /* get the next net */
3172 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
3174 if (list_empty(&net->net_ni_list))
3176 /* get the ni on it */
3177 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3183 if (list_empty(&prev->ni_netlist))
3186 /* there are more nis left */
3187 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
3193 lnet_get_net_config(struct lnet_ioctl_config_data *config)
3198 int idx = config->cfg_count;
3200 cpt = lnet_net_lock_current();
3202 ni = lnet_get_ni_idx_locked(idx);
3207 lnet_fill_ni_info_legacy(ni, config);
3211 lnet_net_unlock(cpt);
3216 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
3217 struct lnet_ioctl_config_lnd_tunables *tun,
3218 struct lnet_ioctl_element_stats *stats,
3225 if (!cfg_ni || !tun || !stats)
3228 cpt = lnet_net_lock_current();
3230 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
3235 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
3239 lnet_net_unlock(cpt);
3243 int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
3252 cpt = lnet_net_lock_current();
3254 ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
3257 lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
3261 lnet_net_unlock(cpt);
3266 static int lnet_add_net_common(struct lnet_net *net,
3267 struct lnet_ioctl_config_lnd_tunables *tun)
3269 struct lnet_handle_md ping_mdh;
3270 struct lnet_ping_buffer *pbuf;
3271 struct lnet_remotenet *rnet;
3277 lnet_net_lock(LNET_LOCK_EX);
3278 rnet = lnet_find_rnet_locked(net->net_id);
3279 lnet_net_unlock(LNET_LOCK_EX);
3281 * make sure that the net added doesn't invalidate the current
3282 * configuration LNet is keeping
3285 CERROR("Adding net %s will invalidate routing configuration\n",
3286 libcfs_net2str(net->net_id));
3292 * make sure you calculate the correct number of slots in the ping
3293 * buffer. Since the ping info is a flattened list of all the NIs,
3294 * we should allocate enough slots to accomodate the number of NIs
3295 * which will be added.
3297 * since ni hasn't been configured yet, use
3298 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
3300 net_ni_count = lnet_get_net_ni_count_pre(net);
3302 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3303 net_ni_count + lnet_get_ni_count(),
3311 memcpy(&net->net_tunables,
3312 &tun->lt_cmn, sizeof(net->net_tunables));
3314 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
3316 net_id = net->net_id;
3318 rc = lnet_startup_lndnet(net,
3319 (tun) ? &tun->lt_tun : NULL);
3323 lnet_net_lock(LNET_LOCK_EX);
3324 net = lnet_get_net_locked(net_id);
3327 /* apply the UDSPs */
3328 rc = lnet_udsp_apply_policies_on_net(net);
3330 CERROR("Failed to apply UDSPs on local net %s\n",
3331 libcfs_net2str(net->net_id));
3333 /* At this point we lost track of which NI was just added, so we
3334 * just re-apply the policies on all of the NIs on this net
3336 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3337 rc = lnet_udsp_apply_policies_on_ni(ni);
3339 CERROR("Failed to apply UDSPs on ni %s\n",
3340 libcfs_nid2str(ni->ni_nid));
3342 lnet_net_unlock(LNET_LOCK_EX);
3345 * Start the acceptor thread if this is the first network
3346 * being added that requires the thread.
3348 if (net->net_lnd->lnd_accept) {
3349 rc = lnet_acceptor_start();
3351 /* shutdown the net that we just started */
3352 CERROR("Failed to start up acceptor thread\n");
3353 lnet_shutdown_lndnet(net);
3358 lnet_net_lock(LNET_LOCK_EX);
3359 lnet_peer_net_added(net);
3360 lnet_net_unlock(LNET_LOCK_EX);
3362 lnet_ping_target_update(pbuf, ping_mdh);
3367 lnet_ping_md_unlink(pbuf, &ping_mdh);
3368 lnet_ping_buffer_decref(pbuf);
3373 lnet_set_tune_defaults(struct lnet_ioctl_config_lnd_tunables *tun)
3376 if (!tun->lt_cmn.lct_peer_timeout)
3377 tun->lt_cmn.lct_peer_timeout = DEFAULT_PEER_TIMEOUT;
3378 if (!tun->lt_cmn.lct_peer_tx_credits)
3379 tun->lt_cmn.lct_peer_tx_credits = DEFAULT_PEER_CREDITS;
3380 if (!tun->lt_cmn.lct_max_tx_credits)
3381 tun->lt_cmn.lct_max_tx_credits = DEFAULT_CREDITS;
3385 static int lnet_handle_legacy_ip2nets(char *ip2nets,
3386 struct lnet_ioctl_config_lnd_tunables *tun)
3388 struct lnet_net *net;
3391 LIST_HEAD(net_head);
3393 rc = lnet_parse_ip2nets(&nets, ip2nets);
3397 rc = lnet_parse_networks(&net_head, nets);
3401 lnet_set_tune_defaults(tun);
3403 mutex_lock(&the_lnet.ln_api_mutex);
3404 while (!list_empty(&net_head)) {
3405 net = list_entry(net_head.next, struct lnet_net, net_list);
3406 list_del_init(&net->net_list);
3407 rc = lnet_add_net_common(net, tun);
3413 mutex_unlock(&the_lnet.ln_api_mutex);
3415 while (!list_empty(&net_head)) {
3416 net = list_entry(net_head.next, struct lnet_net, net_list);
3417 list_del_init(&net->net_list);
3423 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
3425 struct lnet_net *net;
3427 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3429 __u32 net_id, lnd_type;
3431 /* get the tunables if they are available */
3432 if (conf->lic_cfg_hdr.ioc_len >=
3433 sizeof(*conf) + sizeof(*tun))
3434 tun = (struct lnet_ioctl_config_lnd_tunables *)
3437 /* handle legacy ip2nets from DLC */
3438 if (conf->lic_legacy_ip2nets[0] != '\0')
3439 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
3442 net_id = LNET_NIDNET(conf->lic_nid);
3443 lnd_type = LNET_NETTYP(net_id);
3445 if (!libcfs_isknown_lnd(lnd_type)) {
3446 CERROR("No valid net and lnd information provided\n");
3450 net = lnet_net_alloc(net_id, NULL);
3454 for (i = 0; i < conf->lic_ncpts; i++) {
3455 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
3459 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
3464 lnet_set_tune_defaults(tun);
3466 mutex_lock(&the_lnet.ln_api_mutex);
3468 rc = lnet_add_net_common(net, tun);
3470 mutex_unlock(&the_lnet.ln_api_mutex);
3475 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
3477 struct lnet_net *net;
3479 __u32 net_id = LNET_NIDNET(conf->lic_nid);
3480 struct lnet_ping_buffer *pbuf;
3481 struct lnet_handle_md ping_mdh;
3486 /* don't allow userspace to shutdown the LOLND */
3487 if (LNET_NETTYP(net_id) == LOLND)
3490 mutex_lock(&the_lnet.ln_api_mutex);
3494 net = lnet_get_net_locked(net_id);
3496 CERROR("net %s not found\n",
3497 libcfs_net2str(net_id));
3502 addr = LNET_NIDADDR(conf->lic_nid);
3504 /* remove the entire net */
3505 net_count = lnet_get_net_ni_count_locked(net);
3509 /* create and link a new ping info, before removing the old one */
3510 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3511 lnet_get_ni_count() - net_count,
3514 goto unlock_api_mutex;
3516 lnet_shutdown_lndnet(net);
3518 lnet_acceptor_stop();
3520 lnet_ping_target_update(pbuf, ping_mdh);
3522 goto unlock_api_mutex;
3525 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
3527 CERROR("nid %s not found\n",
3528 libcfs_nid2str(conf->lic_nid));
3533 net_count = lnet_get_net_ni_count_locked(net);
3537 /* create and link a new ping info, before removing the old one */
3538 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3539 lnet_get_ni_count() - 1, false);
3541 goto unlock_api_mutex;
3543 lnet_shutdown_lndni(ni);
3545 lnet_acceptor_stop();
3547 lnet_ping_target_update(pbuf, ping_mdh);
3549 /* check if the net is empty and remove it if it is */
3551 lnet_shutdown_lndnet(net);
3553 goto unlock_api_mutex;
3558 mutex_unlock(&the_lnet.ln_api_mutex);
3564 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
3565 * They are only expected to be called for unique networks.
3566 * That can be as a result of older DLC library
3567 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
3570 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
3572 struct lnet_net *net;
3573 LIST_HEAD(net_head);
3575 struct lnet_ioctl_config_lnd_tunables tun;
3576 const char *nets = conf->cfg_config_u.cfg_net.net_intf;
3578 /* Create a net/ni structures for the network string */
3579 rc = lnet_parse_networks(&net_head, nets);
3581 return rc == 0 ? -EINVAL : rc;
3583 mutex_lock(&the_lnet.ln_api_mutex);
3586 rc = -EINVAL; /* only add one network per call */
3587 goto out_unlock_clean;
3590 net = list_entry(net_head.next, struct lnet_net, net_list);
3591 list_del_init(&net->net_list);
3593 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
3595 memset(&tun, 0, sizeof(tun));
3597 tun.lt_cmn.lct_peer_timeout =
3598 (!conf->cfg_config_u.cfg_net.net_peer_timeout) ? DEFAULT_PEER_TIMEOUT :
3599 conf->cfg_config_u.cfg_net.net_peer_timeout;
3600 tun.lt_cmn.lct_peer_tx_credits =
3601 (!conf->cfg_config_u.cfg_net.net_peer_tx_credits) ? DEFAULT_PEER_CREDITS :
3602 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
3603 tun.lt_cmn.lct_peer_rtr_credits =
3604 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
3605 tun.lt_cmn.lct_max_tx_credits =
3606 (!conf->cfg_config_u.cfg_net.net_max_tx_credits) ? DEFAULT_CREDITS :
3607 conf->cfg_config_u.cfg_net.net_max_tx_credits;
3609 rc = lnet_add_net_common(net, &tun);
3612 mutex_unlock(&the_lnet.ln_api_mutex);
3613 while (!list_empty(&net_head)) {
3614 /* net_head list is empty in success case */
3615 net = list_entry(net_head.next, struct lnet_net, net_list);
3616 list_del_init(&net->net_list);
3623 lnet_dyn_del_net(__u32 net_id)
3625 struct lnet_net *net;
3626 struct lnet_ping_buffer *pbuf;
3627 struct lnet_handle_md ping_mdh;
3631 /* don't allow userspace to shutdown the LOLND */
3632 if (LNET_NETTYP(net_id) == LOLND)
3635 mutex_lock(&the_lnet.ln_api_mutex);
3639 net = lnet_get_net_locked(net_id);
3646 net_ni_count = lnet_get_net_ni_count_locked(net);
3650 /* create and link a new ping info, before removing the old one */
3651 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3652 lnet_get_ni_count() - net_ni_count, false);
3656 lnet_shutdown_lndnet(net);
3658 lnet_acceptor_stop();
3660 lnet_ping_target_update(pbuf, ping_mdh);
3663 mutex_unlock(&the_lnet.ln_api_mutex);
3668 void lnet_incr_dlc_seq(void)
3670 atomic_inc(&lnet_dlc_seq_no);
3673 __u32 lnet_get_dlc_seq_locked(void)
3675 return atomic_read(&lnet_dlc_seq_no);
3679 lnet_ni_set_healthv(lnet_nid_t nid, int value, bool all)
3681 struct lnet_net *net;
3684 lnet_net_lock(LNET_LOCK_EX);
3685 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3686 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3687 if (ni->ni_nid == nid || all) {
3688 atomic_set(&ni->ni_healthv, value);
3689 if (list_empty(&ni->ni_recovery) &&
3690 value < LNET_MAX_HEALTH_VALUE) {
3691 CERROR("manually adding local NI %s to recovery\n",
3692 libcfs_nid2str(ni->ni_nid));
3693 list_add_tail(&ni->ni_recovery,
3694 &the_lnet.ln_mt_localNIRecovq);
3695 lnet_ni_addref_locked(ni, 0);
3698 lnet_net_unlock(LNET_LOCK_EX);
3704 lnet_net_unlock(LNET_LOCK_EX);
3708 lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
3712 lnet_nid_t nid = stats->hlni_nid;
3714 cpt = lnet_net_lock_current();
3715 ni = lnet_nid2ni_locked(nid, cpt);
3722 stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
3723 stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
3724 stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
3725 stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
3726 stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
3727 stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
3728 stats->hlni_health_value = atomic_read(&ni->ni_healthv);
3731 lnet_net_unlock(cpt);
3737 lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3742 lnet_net_lock(LNET_LOCK_EX);
3743 list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
3744 list->rlst_nid_array[i] = ni->ni_nid;
3746 if (i >= LNET_MAX_SHOW_NUM_NID)
3749 lnet_net_unlock(LNET_LOCK_EX);
3750 list->rlst_num_nids = i;
3756 lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3758 struct lnet_peer_ni *lpni;
3761 lnet_net_lock(LNET_LOCK_EX);
3762 list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
3763 list->rlst_nid_array[i] = lpni->lpni_nid;
3765 if (i >= LNET_MAX_SHOW_NUM_NID)
3768 lnet_net_unlock(LNET_LOCK_EX);
3769 list->rlst_num_nids = i;
3775 * LNet ioctl handler.
3779 LNetCtl(unsigned int cmd, void *arg)
3781 struct libcfs_ioctl_data *data = arg;
3782 struct lnet_ioctl_config_data *config;
3783 struct lnet_process_id id = {0};
3787 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
3788 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
3791 case IOC_LIBCFS_GET_NI:
3792 rc = LNetGetId(data->ioc_count, &id);
3793 data->ioc_nid = id.nid;
3796 case IOC_LIBCFS_FAIL_NID:
3797 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
3799 case IOC_LIBCFS_ADD_ROUTE: {
3800 /* default router sensitivity to 1 */
3801 unsigned int sensitivity = 1;
3804 if (config->cfg_hdr.ioc_len < sizeof(*config))
3807 if (config->cfg_config_u.cfg_route.rtr_sensitivity) {
3809 config->cfg_config_u.cfg_route.rtr_sensitivity;
3812 mutex_lock(&the_lnet.ln_api_mutex);
3813 rc = lnet_add_route(config->cfg_net,
3814 config->cfg_config_u.cfg_route.rtr_hop,
3816 config->cfg_config_u.cfg_route.
3817 rtr_priority, sensitivity);
3818 mutex_unlock(&the_lnet.ln_api_mutex);
3822 case IOC_LIBCFS_DEL_ROUTE:
3825 if (config->cfg_hdr.ioc_len < sizeof(*config))
3828 mutex_lock(&the_lnet.ln_api_mutex);
3829 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
3830 mutex_unlock(&the_lnet.ln_api_mutex);
3833 case IOC_LIBCFS_GET_ROUTE:
3836 if (config->cfg_hdr.ioc_len < sizeof(*config))
3839 mutex_lock(&the_lnet.ln_api_mutex);
3840 rc = lnet_get_route(config->cfg_count,
3842 &config->cfg_config_u.cfg_route.rtr_hop,
3844 &config->cfg_config_u.cfg_route.rtr_flags,
3845 &config->cfg_config_u.cfg_route.
3847 &config->cfg_config_u.cfg_route.
3849 mutex_unlock(&the_lnet.ln_api_mutex);
3852 case IOC_LIBCFS_GET_LOCAL_NI: {
3853 struct lnet_ioctl_config_ni *cfg_ni;
3854 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3855 struct lnet_ioctl_element_stats *stats;
3860 /* get the tunables if they are available */
3861 if (cfg_ni->lic_cfg_hdr.ioc_len <
3862 sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
3865 stats = (struct lnet_ioctl_element_stats *)
3867 tun = (struct lnet_ioctl_config_lnd_tunables *)
3868 (cfg_ni->lic_bulk + sizeof(*stats));
3870 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
3873 mutex_lock(&the_lnet.ln_api_mutex);
3874 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
3875 mutex_unlock(&the_lnet.ln_api_mutex);
3879 case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
3880 struct lnet_ioctl_element_msg_stats *msg_stats = arg;
3882 if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
3885 mutex_lock(&the_lnet.ln_api_mutex);
3886 rc = lnet_get_ni_stats(msg_stats);
3887 mutex_unlock(&the_lnet.ln_api_mutex);
3892 case IOC_LIBCFS_GET_NET: {
3893 size_t total = sizeof(*config) +
3894 sizeof(struct lnet_ioctl_net_config);
3897 if (config->cfg_hdr.ioc_len < total)
3900 mutex_lock(&the_lnet.ln_api_mutex);
3901 rc = lnet_get_net_config(config);
3902 mutex_unlock(&the_lnet.ln_api_mutex);
3906 case IOC_LIBCFS_GET_LNET_STATS:
3908 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
3910 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
3913 mutex_lock(&the_lnet.ln_api_mutex);
3914 rc = lnet_counters_get(&lnet_stats->st_cntrs);
3915 mutex_unlock(&the_lnet.ln_api_mutex);
3919 case IOC_LIBCFS_CONFIG_RTR:
3922 if (config->cfg_hdr.ioc_len < sizeof(*config))
3925 mutex_lock(&the_lnet.ln_api_mutex);
3926 if (config->cfg_config_u.cfg_buffers.buf_enable) {
3927 rc = lnet_rtrpools_enable();
3928 mutex_unlock(&the_lnet.ln_api_mutex);
3931 lnet_rtrpools_disable();
3932 mutex_unlock(&the_lnet.ln_api_mutex);
3935 case IOC_LIBCFS_ADD_BUF:
3938 if (config->cfg_hdr.ioc_len < sizeof(*config))
3941 mutex_lock(&the_lnet.ln_api_mutex);
3942 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
3944 config->cfg_config_u.cfg_buffers.
3946 config->cfg_config_u.cfg_buffers.
3948 mutex_unlock(&the_lnet.ln_api_mutex);
3951 case IOC_LIBCFS_SET_NUMA_RANGE: {
3952 struct lnet_ioctl_set_value *numa;
3954 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3956 lnet_net_lock(LNET_LOCK_EX);
3957 lnet_numa_range = numa->sv_value;
3958 lnet_net_unlock(LNET_LOCK_EX);
3962 case IOC_LIBCFS_GET_NUMA_RANGE: {
3963 struct lnet_ioctl_set_value *numa;
3965 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3967 numa->sv_value = lnet_numa_range;
3971 case IOC_LIBCFS_GET_BUF: {
3972 struct lnet_ioctl_pool_cfg *pool_cfg;
3973 size_t total = sizeof(*config) + sizeof(*pool_cfg);
3977 if (config->cfg_hdr.ioc_len < total)
3980 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
3982 mutex_lock(&the_lnet.ln_api_mutex);
3983 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
3984 mutex_unlock(&the_lnet.ln_api_mutex);
3988 case IOC_LIBCFS_GET_LOCAL_HSTATS: {
3989 struct lnet_ioctl_local_ni_hstats *stats = arg;
3991 if (stats->hlni_hdr.ioc_len < sizeof(*stats))
3994 mutex_lock(&the_lnet.ln_api_mutex);
3995 rc = lnet_get_local_ni_hstats(stats);
3996 mutex_unlock(&the_lnet.ln_api_mutex);
4001 case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
4002 struct lnet_ioctl_recovery_list *list = arg;
4003 if (list->rlst_hdr.ioc_len < sizeof(*list))
4006 mutex_lock(&the_lnet.ln_api_mutex);
4007 if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
4008 rc = lnet_get_local_ni_recovery_list(list);
4010 rc = lnet_get_peer_ni_recovery_list(list);
4011 mutex_unlock(&the_lnet.ln_api_mutex);
4015 case IOC_LIBCFS_ADD_PEER_NI: {
4016 struct lnet_ioctl_peer_cfg *cfg = arg;
4018 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4021 mutex_lock(&the_lnet.ln_api_mutex);
4022 rc = lnet_add_peer_ni(cfg->prcfg_prim_nid,
4025 mutex_unlock(&the_lnet.ln_api_mutex);
4029 case IOC_LIBCFS_DEL_PEER_NI: {
4030 struct lnet_ioctl_peer_cfg *cfg = arg;
4032 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4035 mutex_lock(&the_lnet.ln_api_mutex);
4036 rc = lnet_del_peer_ni(cfg->prcfg_prim_nid,
4037 cfg->prcfg_cfg_nid);
4038 mutex_unlock(&the_lnet.ln_api_mutex);
4042 case IOC_LIBCFS_GET_PEER_INFO: {
4043 struct lnet_ioctl_peer *peer_info = arg;
4045 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
4048 mutex_lock(&the_lnet.ln_api_mutex);
4049 rc = lnet_get_peer_ni_info(
4050 peer_info->pr_count,
4052 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
4053 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
4054 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
4055 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
4056 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
4057 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
4058 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
4059 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
4060 mutex_unlock(&the_lnet.ln_api_mutex);
4064 case IOC_LIBCFS_GET_PEER_NI: {
4065 struct lnet_ioctl_peer_cfg *cfg = arg;
4067 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4070 mutex_lock(&the_lnet.ln_api_mutex);
4071 rc = lnet_get_peer_info(cfg,
4072 (void __user *)cfg->prcfg_bulk);
4073 mutex_unlock(&the_lnet.ln_api_mutex);
4077 case IOC_LIBCFS_GET_PEER_LIST: {
4078 struct lnet_ioctl_peer_cfg *cfg = arg;
4080 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4083 mutex_lock(&the_lnet.ln_api_mutex);
4084 rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
4085 (struct lnet_process_id __user *)cfg->prcfg_bulk);
4086 mutex_unlock(&the_lnet.ln_api_mutex);
4090 case IOC_LIBCFS_SET_HEALHV: {
4091 struct lnet_ioctl_reset_health_cfg *cfg = arg;
4093 if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
4095 if (cfg->rh_value < 0 ||
4096 cfg->rh_value > LNET_MAX_HEALTH_VALUE)
4097 value = LNET_MAX_HEALTH_VALUE;
4099 value = cfg->rh_value;
4100 CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
4101 value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
4102 "local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
4103 mutex_lock(&the_lnet.ln_api_mutex);
4104 if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI)
4105 lnet_ni_set_healthv(cfg->rh_nid, value,
4108 lnet_peer_ni_set_healthv(cfg->rh_nid, value,
4110 mutex_unlock(&the_lnet.ln_api_mutex);
4114 case IOC_LIBCFS_NOTIFY_ROUTER: {
4115 time64_t deadline = ktime_get_real_seconds() - data->ioc_u64[0];
4117 /* The deadline passed in by the user should be some time in
4118 * seconds in the future since the UNIX epoch. We have to map
4119 * that deadline to the wall clock.
4121 deadline += ktime_get_seconds();
4122 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, false,
4126 case IOC_LIBCFS_LNET_DIST:
4127 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
4128 if (rc < 0 && rc != -EHOSTUNREACH)
4131 data->ioc_u32[0] = rc;
4134 case IOC_LIBCFS_TESTPROTOCOMPAT:
4135 the_lnet.ln_testprotocompat = data->ioc_flags;
4138 case IOC_LIBCFS_LNET_FAULT:
4139 return lnet_fault_ctl(data->ioc_flags, data);
4141 case IOC_LIBCFS_PING: {
4142 signed long timeout;
4144 id.nid = data->ioc_nid;
4145 id.pid = data->ioc_u32[0];
4147 /* If timeout is negative then set default of 3 minutes */
4148 if (((s32)data->ioc_u32[1] <= 0) ||
4149 data->ioc_u32[1] > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
4150 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
4152 timeout = nsecs_to_jiffies(data->ioc_u32[1] * NSEC_PER_MSEC);
4154 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
4155 data->ioc_plen1 / sizeof(struct lnet_process_id));
4160 data->ioc_count = rc;
4164 case IOC_LIBCFS_PING_PEER: {
4165 struct lnet_ioctl_ping_data *ping = arg;
4166 struct lnet_peer *lp;
4167 signed long timeout;
4169 /* If timeout is negative then set default of 3 minutes */
4170 if (((s32)ping->op_param) <= 0 ||
4171 ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
4172 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
4174 timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
4176 rc = lnet_ping(ping->ping_id, timeout,
4182 mutex_lock(&the_lnet.ln_api_mutex);
4183 lp = lnet_find_peer(ping->ping_id.nid);
4185 ping->ping_id.nid = lp->lp_primary_nid;
4186 ping->mr_info = lnet_peer_is_multi_rail(lp);
4187 lnet_peer_decref_locked(lp);
4189 mutex_unlock(&the_lnet.ln_api_mutex);
4191 ping->ping_count = rc;
4195 case IOC_LIBCFS_DISCOVER: {
4196 struct lnet_ioctl_ping_data *discover = arg;
4197 struct lnet_peer *lp;
4199 rc = lnet_discover(discover->ping_id, discover->op_param,
4201 discover->ping_count);
4205 mutex_lock(&the_lnet.ln_api_mutex);
4206 lp = lnet_find_peer(discover->ping_id.nid);
4208 discover->ping_id.nid = lp->lp_primary_nid;
4209 discover->mr_info = lnet_peer_is_multi_rail(lp);
4210 lnet_peer_decref_locked(lp);
4212 mutex_unlock(&the_lnet.ln_api_mutex);
4214 discover->ping_count = rc;
4218 case IOC_LIBCFS_ADD_UDSP: {
4219 struct lnet_ioctl_udsp *ioc_udsp = arg;
4220 __u32 bulk_size = ioc_udsp->iou_hdr.ioc_len;
4222 mutex_lock(&the_lnet.ln_api_mutex);
4223 rc = lnet_udsp_demarshal_add(arg, bulk_size);
4225 rc = lnet_udsp_apply_policies(NULL, false);
4226 CDEBUG(D_NET, "policy application returned %d\n", rc);
4229 mutex_unlock(&the_lnet.ln_api_mutex);
4234 case IOC_LIBCFS_DEL_UDSP: {
4235 struct lnet_ioctl_udsp *ioc_udsp = arg;
4236 int idx = ioc_udsp->iou_idx;
4238 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4241 mutex_lock(&the_lnet.ln_api_mutex);
4242 rc = lnet_udsp_del_policy(idx);
4244 rc = lnet_udsp_apply_policies(NULL, false);
4245 CDEBUG(D_NET, "policy re-application returned %d\n",
4249 mutex_unlock(&the_lnet.ln_api_mutex);
4254 case IOC_LIBCFS_GET_UDSP_SIZE: {
4255 struct lnet_ioctl_udsp *ioc_udsp = arg;
4256 struct lnet_udsp *udsp;
4258 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4263 mutex_lock(&the_lnet.ln_api_mutex);
4264 udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
4268 /* coming in iou_idx will hold the idx of the udsp
4269 * to get the size of. going out the iou_idx will
4270 * hold the size of the UDSP found at the passed
4273 ioc_udsp->iou_idx = lnet_get_udsp_size(udsp);
4274 if (ioc_udsp->iou_idx < 0)
4277 mutex_unlock(&the_lnet.ln_api_mutex);
4282 case IOC_LIBCFS_GET_UDSP: {
4283 struct lnet_ioctl_udsp *ioc_udsp = arg;
4284 struct lnet_udsp *udsp;
4286 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4291 mutex_lock(&the_lnet.ln_api_mutex);
4292 udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
4296 rc = lnet_udsp_marshal(udsp, ioc_udsp);
4297 mutex_unlock(&the_lnet.ln_api_mutex);
4302 case IOC_LIBCFS_GET_CONST_UDSP_INFO: {
4303 struct lnet_ioctl_construct_udsp_info *info = arg;
4305 if (info->cud_hdr.ioc_len < sizeof(*info))
4308 CDEBUG(D_NET, "GET_UDSP_INFO for %s\n",
4309 libcfs_nid2str(info->cud_nid));
4311 mutex_lock(&the_lnet.ln_api_mutex);
4312 lnet_udsp_get_construct_info(info);
4313 mutex_unlock(&the_lnet.ln_api_mutex);
4319 ni = lnet_net2ni_addref(data->ioc_net);
4323 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
4326 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
4333 EXPORT_SYMBOL(LNetCtl);
4335 void LNetDebugPeer(struct lnet_process_id id)
4337 lnet_debug_peer(id.nid);
4339 EXPORT_SYMBOL(LNetDebugPeer);
4342 * Determine if the specified peer \a nid is on the local node.
4344 * \param nid peer nid to check
4346 * \retval true If peer NID is on the local node.
4347 * \retval false If peer NID is not on the local node.
4349 bool LNetIsPeerLocal(lnet_nid_t nid)
4351 struct lnet_net *net;
4355 cpt = lnet_net_lock_current();
4356 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4357 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4358 if (ni->ni_nid == nid) {
4359 lnet_net_unlock(cpt);
4364 lnet_net_unlock(cpt);
4368 EXPORT_SYMBOL(LNetIsPeerLocal);
4371 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
4372 * Note that all interfaces share a same PID, as requested by LNetNIInit().
4374 * \param index Index of the interface to look up.
4375 * \param id On successful return, this location will hold the
4376 * struct lnet_process_id ID of the interface.
4378 * \retval 0 If an interface exists at \a index.
4379 * \retval -ENOENT If no interface has been found.
4382 LNetGetId(unsigned int index, struct lnet_process_id *id)
4385 struct lnet_net *net;
4389 LASSERT(the_lnet.ln_refcount > 0);
4391 cpt = lnet_net_lock_current();
4393 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4394 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4398 id->nid = ni->ni_nid;
4399 id->pid = the_lnet.ln_pid;
4405 lnet_net_unlock(cpt);
4408 EXPORT_SYMBOL(LNetGetId);
4413 struct lnet_handle_md mdh;
4414 struct completion completion;
4418 lnet_ping_event_handler(struct lnet_event *event)
4420 struct ping_data *pd = event->md_user_ptr;
4422 CDEBUG(D_NET, "ping event (%d %d)%s\n",
4423 event->type, event->status,
4424 event->unlinked ? " unlinked" : "");
4426 if (event->status) {
4428 pd->rc = event->status;
4429 } else if (event->type == LNET_EVENT_REPLY) {
4431 pd->rc = event->mlength;
4433 if (event->unlinked)
4434 complete(&pd->completion);
4437 static int lnet_ping(struct lnet_process_id id, signed long timeout,
4438 struct lnet_process_id __user *ids, int n_ids)
4440 struct lnet_md md = { NULL };
4441 struct ping_data pd = { 0 };
4442 struct lnet_ping_buffer *pbuf;
4443 struct lnet_process_id tmpid;
4449 /* n_ids limit is arbitrary */
4450 if (n_ids <= 0 || id.nid == LNET_NID_ANY)
4454 * if the user buffer has more space than the lnet_interfaces_max
4455 * then only fill it up to lnet_interfaces_max
4457 if (n_ids > lnet_interfaces_max)
4458 n_ids = lnet_interfaces_max;
4460 if (id.pid == LNET_PID_ANY)
4461 id.pid = LNET_PID_LUSTRE;
4463 pbuf = lnet_ping_buffer_alloc(n_ids, GFP_NOFS);
4467 /* initialize md content */
4468 md.start = &pbuf->pb_info;
4469 md.length = LNET_PING_INFO_SIZE(n_ids);
4470 md.threshold = 2; /* GET/REPLY */
4472 md.options = LNET_MD_TRUNCATE;
4474 md.handler = lnet_ping_event_handler;
4476 init_completion(&pd.completion);
4478 rc = LNetMDBind(&md, LNET_UNLINK, &pd.mdh);
4480 CERROR("Can't bind MD: %d\n", rc);
4481 goto fail_ping_buffer_decref;
4484 rc = LNetGet(LNET_NID_ANY, pd.mdh, id,
4485 LNET_RESERVED_PORTAL,
4486 LNET_PROTO_PING_MATCHBITS, 0, false);
4489 /* Don't CERROR; this could be deliberate! */
4490 rc2 = LNetMDUnlink(pd.mdh);
4493 /* NB must wait for the UNLINK event below... */
4496 if (wait_for_completion_timeout(&pd.completion, timeout) == 0) {
4497 /* Ensure completion in finite time... */
4498 LNetMDUnlink(pd.mdh);
4499 wait_for_completion(&pd.completion);
4503 goto fail_ping_buffer_decref;
4507 LASSERT(nob >= 0 && nob <= LNET_PING_INFO_SIZE(n_ids));
4509 rc = -EPROTO; /* if I can't parse... */
4512 CERROR("%s: ping info too short %d\n",
4513 libcfs_id2str(id), nob);
4514 goto fail_ping_buffer_decref;
4517 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
4518 lnet_swap_pinginfo(pbuf);
4519 } else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
4520 CERROR("%s: Unexpected magic %08x\n",
4521 libcfs_id2str(id), pbuf->pb_info.pi_magic);
4522 goto fail_ping_buffer_decref;
4525 if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
4526 CERROR("%s: ping w/o NI status: 0x%x\n",
4527 libcfs_id2str(id), pbuf->pb_info.pi_features);
4528 goto fail_ping_buffer_decref;
4531 if (nob < LNET_PING_INFO_SIZE(0)) {
4532 CERROR("%s: Short reply %d(%d min)\n",
4534 nob, (int)LNET_PING_INFO_SIZE(0));
4535 goto fail_ping_buffer_decref;
4538 if (pbuf->pb_info.pi_nnis < n_ids)
4539 n_ids = pbuf->pb_info.pi_nnis;
4541 if (nob < LNET_PING_INFO_SIZE(n_ids)) {
4542 CERROR("%s: Short reply %d(%d expected)\n",
4544 nob, (int)LNET_PING_INFO_SIZE(n_ids));
4545 goto fail_ping_buffer_decref;
4548 rc = -EFAULT; /* if I segv in copy_to_user()... */
4550 memset(&tmpid, 0, sizeof(tmpid));
4551 for (i = 0; i < n_ids; i++) {
4552 tmpid.pid = pbuf->pb_info.pi_pid;
4553 tmpid.nid = pbuf->pb_info.pi_ni[i].ns_nid;
4554 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
4555 goto fail_ping_buffer_decref;
4557 rc = pbuf->pb_info.pi_nnis;
4559 fail_ping_buffer_decref:
4560 lnet_ping_buffer_decref(pbuf);
4565 lnet_discover(struct lnet_process_id id, __u32 force,
4566 struct lnet_process_id __user *ids, int n_ids)
4568 struct lnet_peer_ni *lpni;
4569 struct lnet_peer_ni *p;
4570 struct lnet_peer *lp;
4571 struct lnet_process_id *buf;
4577 id.nid == LNET_NID_ANY)
4580 if (id.pid == LNET_PID_ANY)
4581 id.pid = LNET_PID_LUSTRE;
4584 * If the user buffer has more space than the lnet_interfaces_max,
4585 * then only fill it up to lnet_interfaces_max.
4587 if (n_ids > lnet_interfaces_max)
4588 n_ids = lnet_interfaces_max;
4590 CFS_ALLOC_PTR_ARRAY(buf, n_ids);
4594 cpt = lnet_net_lock_current();
4595 lpni = lnet_nid2peerni_locked(id.nid, LNET_NID_ANY, cpt);
4602 * Clearing the NIDS_UPTODATE flag ensures the peer will
4603 * be discovered, provided discovery has not been disabled.
4605 lp = lpni->lpni_peer_net->lpn_peer;
4606 spin_lock(&lp->lp_lock);
4607 lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
4608 /* If the force flag is set, force a PING and PUSH as well. */
4610 lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
4611 spin_unlock(&lp->lp_lock);
4612 rc = lnet_discover_peer_locked(lpni, cpt, true);
4616 /* The lpni (or lp) for this NID may have changed and our ref is
4617 * the only thing keeping the old one around. Release the ref
4618 * and lookup the lpni again
4620 lnet_peer_ni_decref_locked(lpni);
4621 lpni = lnet_find_peer_ni_locked(id.nid);
4626 lp = lpni->lpni_peer_net->lpn_peer;
4630 while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
4631 buf[i].pid = id.pid;
4632 buf[i].nid = p->lpni_nid;
4639 lnet_peer_ni_decref_locked(lpni);
4641 lnet_net_unlock(cpt);
4644 if (copy_to_user(ids, buf, rc * sizeof(*buf)))
4646 CFS_FREE_PTR_ARRAY(buf, n_ids);
4652 * Retrieve peer discovery status.
4654 * \retval 1 if lnet_peer_discovery_disabled is 0
4655 * \retval 0 if lnet_peer_discovery_disabled is 1
4658 LNetGetPeerDiscoveryStatus(void)
4660 return !lnet_peer_discovery_disabled;
4662 EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);