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/
32 #define DEBUG_SUBSYSTEM S_LNET
34 #include <linux/ctype.h>
35 #include <linux/log2.h>
36 #include <linux/ktime.h>
37 #include <linux/moduleparam.h>
38 #include <linux/uaccess.h>
39 #ifdef HAVE_SCHED_HEADERS
40 #include <linux/sched/signal.h>
43 #include <lnet/udsp.h>
44 #include <lnet/lib-lnet.h>
46 #define D_LNI D_CONSOLE
49 * initialize ln_api_mutex statically, since it needs to be used in
50 * discovery_set callback. That module parameter callback can be called
51 * before module init completes. The mutex needs to be ready for use then.
53 struct lnet the_lnet = {
54 .ln_api_mutex = __MUTEX_INITIALIZER(the_lnet.ln_api_mutex),
55 }; /* THE state of the network */
56 EXPORT_SYMBOL(the_lnet);
58 static char *ip2nets = "";
59 module_param(ip2nets, charp, 0444);
60 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
62 static char *networks = "";
63 module_param(networks, charp, 0444);
64 MODULE_PARM_DESC(networks, "local networks");
66 static char *routes = "";
67 module_param(routes, charp, 0444);
68 MODULE_PARM_DESC(routes, "routes to non-local networks");
70 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
71 module_param(rnet_htable_size, int, 0444);
72 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
74 static int use_tcp_bonding;
75 module_param(use_tcp_bonding, int, 0444);
76 MODULE_PARM_DESC(use_tcp_bonding,
77 "use_tcp_bonding parameter has been removed");
79 unsigned int lnet_numa_range = 0;
80 module_param(lnet_numa_range, uint, 0444);
81 MODULE_PARM_DESC(lnet_numa_range,
82 "NUMA range to consider during Multi-Rail selection");
85 * lnet_health_sensitivity determines by how much we decrement the health
86 * value on sending error. The value defaults to 100, which means health
87 * interface health is decremented by 100 points every failure.
89 unsigned int lnet_health_sensitivity = 100;
90 static int sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp);
91 #ifdef HAVE_KERNEL_PARAM_OPS
92 static struct kernel_param_ops param_ops_health_sensitivity = {
93 .set = sensitivity_set,
96 #define param_check_health_sensitivity(name, p) \
97 __param_check(name, p, int)
98 module_param(lnet_health_sensitivity, health_sensitivity, S_IRUGO|S_IWUSR);
100 module_param_call(lnet_health_sensitivity, sensitivity_set, param_get_int,
101 &lnet_health_sensitivity, S_IRUGO|S_IWUSR);
103 MODULE_PARM_DESC(lnet_health_sensitivity,
104 "Value to decrement the health value by on error");
107 * lnet_recovery_interval determines how often we should perform recovery
108 * on unhealthy interfaces.
110 unsigned int lnet_recovery_interval = 1;
111 static int recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp);
112 #ifdef HAVE_KERNEL_PARAM_OPS
113 static struct kernel_param_ops param_ops_recovery_interval = {
114 .set = recovery_interval_set,
115 .get = param_get_int,
117 #define param_check_recovery_interval(name, p) \
118 __param_check(name, p, int)
119 module_param(lnet_recovery_interval, recovery_interval, S_IRUGO|S_IWUSR);
121 module_param_call(lnet_recovery_interval, recovery_interval_set, param_get_int,
122 &lnet_recovery_interval, S_IRUGO|S_IWUSR);
124 MODULE_PARM_DESC(lnet_recovery_interval,
125 "DEPRECATED - Interval to recover unhealthy interfaces in seconds");
127 unsigned int lnet_recovery_limit;
128 module_param(lnet_recovery_limit, uint, 0644);
129 MODULE_PARM_DESC(lnet_recovery_limit,
130 "How long to attempt recovery of unhealthy peer interfaces in seconds. Set to 0 to allow indefinite recovery");
132 static int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
133 static int intf_max_set(const char *val, cfs_kernel_param_arg_t *kp);
135 static struct kernel_param_ops param_ops_interfaces_max = {
137 .get = param_get_int,
140 #define param_check_interfaces_max(name, p) \
141 __param_check(name, p, int)
143 #ifdef HAVE_KERNEL_PARAM_OPS
144 module_param(lnet_interfaces_max, interfaces_max, 0644);
146 module_param_call(lnet_interfaces_max, intf_max_set, param_get_int,
147 ¶m_ops_interfaces_max, 0644);
149 MODULE_PARM_DESC(lnet_interfaces_max,
150 "Maximum number of interfaces in a node.");
152 unsigned lnet_peer_discovery_disabled = 0;
153 static int discovery_set(const char *val, cfs_kernel_param_arg_t *kp);
155 static struct kernel_param_ops param_ops_discovery_disabled = {
156 .set = discovery_set,
157 .get = param_get_int,
160 #define param_check_discovery_disabled(name, p) \
161 __param_check(name, p, int)
162 #ifdef HAVE_KERNEL_PARAM_OPS
163 module_param(lnet_peer_discovery_disabled, discovery_disabled, 0644);
165 module_param_call(lnet_peer_discovery_disabled, discovery_set, param_get_int,
166 ¶m_ops_discovery_disabled, 0644);
168 MODULE_PARM_DESC(lnet_peer_discovery_disabled,
169 "Set to 1 to disable peer discovery on this node.");
171 unsigned int lnet_drop_asym_route;
172 static int drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp);
174 static struct kernel_param_ops param_ops_drop_asym_route = {
175 .set = drop_asym_route_set,
176 .get = param_get_int,
179 #define param_check_drop_asym_route(name, p) \
180 __param_check(name, p, int)
181 #ifdef HAVE_KERNEL_PARAM_OPS
182 module_param(lnet_drop_asym_route, drop_asym_route, 0644);
184 module_param_call(lnet_drop_asym_route, drop_asym_route_set, param_get_int,
185 ¶m_ops_drop_asym_route, 0644);
187 MODULE_PARM_DESC(lnet_drop_asym_route,
188 "Set to 1 to drop asymmetrical route messages.");
190 #define LNET_TRANSACTION_TIMEOUT_DEFAULT 50
191 unsigned int lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_DEFAULT;
192 static int transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp);
193 #ifdef HAVE_KERNEL_PARAM_OPS
194 static struct kernel_param_ops param_ops_transaction_timeout = {
195 .set = transaction_to_set,
196 .get = param_get_int,
199 #define param_check_transaction_timeout(name, p) \
200 __param_check(name, p, int)
201 module_param(lnet_transaction_timeout, transaction_timeout, S_IRUGO|S_IWUSR);
203 module_param_call(lnet_transaction_timeout, transaction_to_set, param_get_int,
204 &lnet_transaction_timeout, S_IRUGO|S_IWUSR);
206 MODULE_PARM_DESC(lnet_transaction_timeout,
207 "Maximum number of seconds to wait for a peer response.");
209 #define LNET_RETRY_COUNT_DEFAULT 2
210 unsigned int lnet_retry_count = LNET_RETRY_COUNT_DEFAULT;
211 static int retry_count_set(const char *val, cfs_kernel_param_arg_t *kp);
212 #ifdef HAVE_KERNEL_PARAM_OPS
213 static struct kernel_param_ops param_ops_retry_count = {
214 .set = retry_count_set,
215 .get = param_get_int,
218 #define param_check_retry_count(name, p) \
219 __param_check(name, p, int)
220 module_param(lnet_retry_count, retry_count, S_IRUGO|S_IWUSR);
222 module_param_call(lnet_retry_count, retry_count_set, param_get_int,
223 &lnet_retry_count, S_IRUGO|S_IWUSR);
225 MODULE_PARM_DESC(lnet_retry_count,
226 "Maximum number of times to retry transmitting a message");
228 unsigned int lnet_response_tracking = 3;
229 static int response_tracking_set(const char *val, cfs_kernel_param_arg_t *kp);
231 #ifdef HAVE_KERNEL_PARAM_OPS
232 static struct kernel_param_ops param_ops_response_tracking = {
233 .set = response_tracking_set,
234 .get = param_get_int,
237 #define param_check_response_tracking(name, p) \
238 __param_check(name, p, int)
239 module_param(lnet_response_tracking, response_tracking, 0644);
241 module_param_call(lnet_response_tracking, response_tracking_set, param_get_int,
242 &lnet_response_tracking, 0644);
244 MODULE_PARM_DESC(lnet_response_tracking,
245 "(0|1|2|3) LNet Internal Only|GET Reply only|PUT ACK only|Full Tracking (default)");
247 #define LNET_LND_TIMEOUT_DEFAULT ((LNET_TRANSACTION_TIMEOUT_DEFAULT - 1) / \
248 (LNET_RETRY_COUNT_DEFAULT + 1))
249 unsigned int lnet_lnd_timeout = LNET_LND_TIMEOUT_DEFAULT;
250 static void lnet_set_lnd_timeout(void)
252 lnet_lnd_timeout = (lnet_transaction_timeout - 1) /
253 (lnet_retry_count + 1);
257 * This sequence number keeps track of how many times DLC was used to
258 * update the local NIs. It is incremented when a NI is added or
259 * removed and checked when sending a message to determine if there is
260 * a need to re-run the selection algorithm. See lnet_select_pathway()
261 * for more details on its usage.
263 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
265 static int lnet_ping(struct lnet_process_id id, signed long timeout,
266 struct lnet_process_id __user *ids, int n_ids);
268 static int lnet_discover(struct lnet_process_id id, __u32 force,
269 struct lnet_process_id __user *ids, int n_ids);
272 sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp)
275 unsigned *sensitivity = (unsigned *)kp->arg;
278 rc = kstrtoul(val, 0, &value);
280 CERROR("Invalid module parameter value for 'lnet_health_sensitivity'\n");
285 * The purpose of locking the api_mutex here is to ensure that
286 * the correct value ends up stored properly.
288 mutex_lock(&the_lnet.ln_api_mutex);
290 if (value > LNET_MAX_HEALTH_VALUE) {
291 mutex_unlock(&the_lnet.ln_api_mutex);
292 CERROR("Invalid health value. Maximum: %d value = %lu\n",
293 LNET_MAX_HEALTH_VALUE, value);
297 if (*sensitivity != 0 && value == 0 && lnet_retry_count != 0) {
298 lnet_retry_count = 0;
299 lnet_set_lnd_timeout();
302 *sensitivity = value;
304 mutex_unlock(&the_lnet.ln_api_mutex);
310 recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp)
312 CWARN("'lnet_recovery_interval' has been deprecated\n");
318 discovery_set(const char *val, cfs_kernel_param_arg_t *kp)
321 unsigned *discovery_off = (unsigned *)kp->arg;
323 struct lnet_ping_buffer *pbuf;
325 rc = kstrtoul(val, 0, &value);
327 CERROR("Invalid module parameter value for 'lnet_peer_discovery_disabled'\n");
331 value = (value) ? 1 : 0;
334 * The purpose of locking the api_mutex here is to ensure that
335 * the correct value ends up stored properly.
337 mutex_lock(&the_lnet.ln_api_mutex);
339 if (value == *discovery_off) {
340 mutex_unlock(&the_lnet.ln_api_mutex);
345 * We still want to set the discovery value even when LNet is not
346 * running. This is the case when LNet is being loaded and we want
347 * the module parameters to take effect. Otherwise if we're
348 * changing the value dynamically, we want to set it after
351 if (the_lnet.ln_state != LNET_STATE_RUNNING) {
352 *discovery_off = value;
353 mutex_unlock(&the_lnet.ln_api_mutex);
357 /* tell peers that discovery setting has changed */
358 lnet_net_lock(LNET_LOCK_EX);
359 pbuf = the_lnet.ln_ping_target;
361 pbuf->pb_info.pi_features &= ~LNET_PING_FEAT_DISCOVERY;
363 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
364 lnet_net_unlock(LNET_LOCK_EX);
366 /* only send a push when we're turning off discovery */
367 if (*discovery_off <= 0 && value > 0)
368 lnet_push_update_to_peers(1);
369 *discovery_off = value;
371 mutex_unlock(&the_lnet.ln_api_mutex);
377 drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp)
380 unsigned int *drop_asym_route = (unsigned int *)kp->arg;
383 rc = kstrtoul(val, 0, &value);
385 CERROR("Invalid module parameter value for "
386 "'lnet_drop_asym_route'\n");
391 * The purpose of locking the api_mutex here is to ensure that
392 * the correct value ends up stored properly.
394 mutex_lock(&the_lnet.ln_api_mutex);
396 if (value == *drop_asym_route) {
397 mutex_unlock(&the_lnet.ln_api_mutex);
401 *drop_asym_route = value;
403 mutex_unlock(&the_lnet.ln_api_mutex);
409 transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp)
412 unsigned *transaction_to = (unsigned *)kp->arg;
415 rc = kstrtoul(val, 0, &value);
417 CERROR("Invalid module parameter value for 'lnet_transaction_timeout'\n");
422 * The purpose of locking the api_mutex here is to ensure that
423 * the correct value ends up stored properly.
425 mutex_lock(&the_lnet.ln_api_mutex);
427 if (value <= lnet_retry_count || value == 0) {
428 mutex_unlock(&the_lnet.ln_api_mutex);
429 CERROR("Invalid value for lnet_transaction_timeout (%lu). "
430 "Has to be greater than lnet_retry_count (%u)\n",
431 value, lnet_retry_count);
435 if (value == *transaction_to) {
436 mutex_unlock(&the_lnet.ln_api_mutex);
440 *transaction_to = value;
441 /* Update the lnet_lnd_timeout now that we've modified the
442 * transaction timeout
444 lnet_set_lnd_timeout();
446 mutex_unlock(&the_lnet.ln_api_mutex);
452 retry_count_set(const char *val, cfs_kernel_param_arg_t *kp)
455 unsigned *retry_count = (unsigned *)kp->arg;
458 rc = kstrtoul(val, 0, &value);
460 CERROR("Invalid module parameter value for 'lnet_retry_count'\n");
465 * The purpose of locking the api_mutex here is to ensure that
466 * the correct value ends up stored properly.
468 mutex_lock(&the_lnet.ln_api_mutex);
470 if (lnet_health_sensitivity == 0 && value > 0) {
471 mutex_unlock(&the_lnet.ln_api_mutex);
472 CERROR("Can not set lnet_retry_count when health feature is turned off\n");
476 if (value > lnet_transaction_timeout) {
477 mutex_unlock(&the_lnet.ln_api_mutex);
478 CERROR("Invalid value for lnet_retry_count (%lu). "
479 "Has to be smaller than lnet_transaction_timeout (%u)\n",
480 value, lnet_transaction_timeout);
484 *retry_count = value;
486 /* Update the lnet_lnd_timeout now that we've modified the
489 lnet_set_lnd_timeout();
491 mutex_unlock(&the_lnet.ln_api_mutex);
497 intf_max_set(const char *val, cfs_kernel_param_arg_t *kp)
501 rc = kstrtoint(val, 0, &value);
503 CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
507 if (value < LNET_INTERFACES_MIN) {
508 CWARN("max interfaces provided are too small, setting to %d\n",
509 LNET_INTERFACES_MAX_DEFAULT);
510 value = LNET_INTERFACES_MAX_DEFAULT;
513 *(int *)kp->arg = value;
519 response_tracking_set(const char *val, cfs_kernel_param_arg_t *kp)
522 unsigned long new_value;
524 rc = kstrtoul(val, 0, &new_value);
526 CERROR("Invalid value for 'lnet_response_tracking'\n");
530 if (new_value < 0 || new_value > 3) {
531 CWARN("Invalid value (%lu) for 'lnet_response_tracking'\n",
536 lnet_response_tracking = new_value;
542 lnet_get_routes(void)
548 lnet_get_networks(void)
553 if (*networks != 0 && *ip2nets != 0) {
554 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
555 "'ip2nets' but not both at once\n");
560 rc = lnet_parse_ip2nets(&nets, ip2nets);
561 return (rc == 0) ? nets : NULL;
571 lnet_init_locks(void)
573 spin_lock_init(&the_lnet.ln_eq_wait_lock);
574 spin_lock_init(&the_lnet.ln_msg_resend_lock);
575 init_completion(&the_lnet.ln_mt_wait_complete);
576 mutex_init(&the_lnet.ln_lnd_mutex);
579 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
580 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
582 struct kmem_cache *lnet_udsp_cachep; /* udsp cache */
583 struct kmem_cache *lnet_rspt_cachep; /* response tracker cache */
584 struct kmem_cache *lnet_msg_cachep;
587 lnet_slab_setup(void)
589 /* create specific kmem_cache for MEs and small MDs (i.e., originally
590 * allocated in <size-xxx> kmem_cache).
592 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
594 if (!lnet_mes_cachep)
597 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
598 LNET_SMALL_MD_SIZE, 0, 0,
600 if (!lnet_small_mds_cachep)
603 lnet_udsp_cachep = kmem_cache_create("lnet_udsp",
604 sizeof(struct lnet_udsp),
606 if (!lnet_udsp_cachep)
609 lnet_rspt_cachep = kmem_cache_create("lnet_rspt", sizeof(struct lnet_rsp_tracker),
611 if (!lnet_rspt_cachep)
614 lnet_msg_cachep = kmem_cache_create("lnet_msg", sizeof(struct lnet_msg),
616 if (!lnet_msg_cachep)
623 lnet_slab_cleanup(void)
625 if (lnet_msg_cachep) {
626 kmem_cache_destroy(lnet_msg_cachep);
627 lnet_msg_cachep = NULL;
630 if (lnet_rspt_cachep) {
631 kmem_cache_destroy(lnet_rspt_cachep);
632 lnet_rspt_cachep = NULL;
635 if (lnet_udsp_cachep) {
636 kmem_cache_destroy(lnet_udsp_cachep);
637 lnet_udsp_cachep = NULL;
640 if (lnet_small_mds_cachep) {
641 kmem_cache_destroy(lnet_small_mds_cachep);
642 lnet_small_mds_cachep = NULL;
645 if (lnet_mes_cachep) {
646 kmem_cache_destroy(lnet_mes_cachep);
647 lnet_mes_cachep = NULL;
652 lnet_create_remote_nets_table(void)
655 struct list_head *hash;
657 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
658 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
659 CFS_ALLOC_PTR_ARRAY(hash, LNET_REMOTE_NETS_HASH_SIZE);
661 CERROR("Failed to create remote nets hash table\n");
665 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
666 INIT_LIST_HEAD(&hash[i]);
667 the_lnet.ln_remote_nets_hash = hash;
672 lnet_destroy_remote_nets_table(void)
676 if (the_lnet.ln_remote_nets_hash == NULL)
679 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
680 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
682 CFS_FREE_PTR_ARRAY(the_lnet.ln_remote_nets_hash,
683 LNET_REMOTE_NETS_HASH_SIZE);
684 the_lnet.ln_remote_nets_hash = NULL;
688 lnet_destroy_locks(void)
690 if (the_lnet.ln_res_lock != NULL) {
691 cfs_percpt_lock_free(the_lnet.ln_res_lock);
692 the_lnet.ln_res_lock = NULL;
695 if (the_lnet.ln_net_lock != NULL) {
696 cfs_percpt_lock_free(the_lnet.ln_net_lock);
697 the_lnet.ln_net_lock = NULL;
702 lnet_create_locks(void)
706 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
707 if (the_lnet.ln_res_lock == NULL)
710 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
711 if (the_lnet.ln_net_lock == NULL)
717 lnet_destroy_locks();
721 static void lnet_assert_wire_constants(void)
723 /* Wire protocol assertions generated by 'wirecheck'
724 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
725 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
726 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)
730 BUILD_BUG_ON(LNET_PROTO_TCP_MAGIC != 0xeebc0ded);
731 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MAJOR != 1);
732 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MINOR != 0);
733 BUILD_BUG_ON(LNET_MSG_ACK != 0);
734 BUILD_BUG_ON(LNET_MSG_PUT != 1);
735 BUILD_BUG_ON(LNET_MSG_GET != 2);
736 BUILD_BUG_ON(LNET_MSG_REPLY != 3);
737 BUILD_BUG_ON(LNET_MSG_HELLO != 4);
739 BUILD_BUG_ON((int)sizeof(lnet_nid_t) != 8);
740 BUILD_BUG_ON((int)sizeof(lnet_pid_t) != 4);
742 /* Checks for struct lnet_process_id_packed */
743 BUILD_BUG_ON((int)sizeof(struct lnet_process_id_packed) != 12);
744 BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, nid) != 0);
745 BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->nid) != 8);
746 BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, pid) != 8);
747 BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->pid) != 4);
749 /* Checks for struct lnet_handle_wire */
750 BUILD_BUG_ON((int)sizeof(struct lnet_handle_wire) != 16);
751 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
752 wh_interface_cookie) != 0);
753 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) != 8);
754 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
755 wh_object_cookie) != 8);
756 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) != 8);
758 /* Checks for struct struct lnet_magicversion */
759 BUILD_BUG_ON((int)sizeof(struct lnet_magicversion) != 8);
760 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, magic) != 0);
761 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->magic) != 4);
762 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_major) != 4);
763 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_major) != 2);
764 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion,
765 version_minor) != 6);
766 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_minor) != 2);
768 /* Checks for struct struct lnet_hdr */
769 BUILD_BUG_ON((int)sizeof(struct lnet_hdr) != 72);
770 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_nid) != 0);
771 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_nid) != 8);
772 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_nid) != 8);
773 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_nid) != 8);
774 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_pid) != 16);
775 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_pid) != 4);
776 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_pid) != 20);
777 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_pid) != 4);
778 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, type) != 24);
779 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->type) != 4);
780 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, payload_length) != 28);
781 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->payload_length) != 4);
782 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg) != 32);
783 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg) != 40);
786 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) != 32);
787 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) != 16);
788 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.match_bits) != 48);
789 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) != 8);
790 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.mlength) != 56);
791 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) != 4);
794 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) != 32);
795 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) != 16);
796 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.match_bits) != 48);
797 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) != 8);
798 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.hdr_data) != 56);
799 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) != 8);
800 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ptl_index) != 64);
801 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) != 4);
802 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.offset) != 68);
803 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) != 4);
806 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.return_wmd) != 32);
807 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) != 16);
808 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.match_bits) != 48);
809 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) != 8);
810 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.ptl_index) != 56);
811 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) != 4);
812 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.src_offset) != 60);
813 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) != 4);
814 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.sink_length) != 64);
815 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) != 4);
818 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) != 32);
819 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) != 16);
822 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.incarnation) != 32);
823 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) != 8);
824 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.type) != 40);
825 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) != 4);
827 /* Checks for struct lnet_ni_status and related constants */
828 BUILD_BUG_ON(LNET_NI_STATUS_INVALID != 0x00000000);
829 BUILD_BUG_ON(LNET_NI_STATUS_UP != 0x15aac0de);
830 BUILD_BUG_ON(LNET_NI_STATUS_DOWN != 0xdeadface);
832 /* Checks for struct lnet_ni_status */
833 BUILD_BUG_ON((int)sizeof(struct lnet_ni_status) != 16);
834 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_nid) != 0);
835 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_nid) != 8);
836 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_status) != 8);
837 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_status) != 4);
838 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_unused) != 12);
839 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_unused) != 4);
841 /* Checks for struct lnet_ping_info and related constants */
842 BUILD_BUG_ON(LNET_PROTO_PING_MAGIC != 0x70696E67);
843 BUILD_BUG_ON(LNET_PING_FEAT_INVAL != 0);
844 BUILD_BUG_ON(LNET_PING_FEAT_BASE != 1);
845 BUILD_BUG_ON(LNET_PING_FEAT_NI_STATUS != 2);
846 BUILD_BUG_ON(LNET_PING_FEAT_RTE_DISABLED != 4);
847 BUILD_BUG_ON(LNET_PING_FEAT_MULTI_RAIL != 8);
848 BUILD_BUG_ON(LNET_PING_FEAT_DISCOVERY != 16);
849 BUILD_BUG_ON(LNET_PING_FEAT_BITS != 31);
851 /* Checks for struct lnet_ping_info */
852 BUILD_BUG_ON((int)sizeof(struct lnet_ping_info) != 16);
853 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_magic) != 0);
854 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_magic) != 4);
855 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_features) != 4);
856 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_features) != 4);
857 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_pid) != 8);
858 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_pid) != 4);
859 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_nnis) != 12);
860 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_nnis) != 4);
861 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_ni) != 16);
862 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_ni) != 0);
864 /* Acceptor connection request */
865 BUILD_BUG_ON(LNET_PROTO_ACCEPTOR_VERSION != 1);
867 /* Checks for struct lnet_acceptor_connreq */
868 BUILD_BUG_ON((int)sizeof(struct lnet_acceptor_connreq) != 16);
869 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_magic) != 0);
870 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_magic) != 4);
871 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_version) != 4);
872 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_version) != 4);
873 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_nid) != 8);
874 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_nid) != 8);
876 /* Checks for struct lnet_counters_common */
877 BUILD_BUG_ON((int)sizeof(struct lnet_counters_common) != 60);
878 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_alloc) != 0);
879 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_alloc) != 4);
880 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_max) != 4);
881 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_max) != 4);
882 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_errors) != 8);
883 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_errors) != 4);
884 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_count) != 12);
885 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_count) != 4);
886 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_count) != 16);
887 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_count) != 4);
888 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_count) != 20);
889 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_count) != 4);
890 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_count) != 24);
891 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_count) != 4);
892 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_length) != 28);
893 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_length) != 8);
894 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_length) != 36);
895 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_length) != 8);
896 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_length) != 44);
897 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_length) != 8);
898 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_length) != 52);
899 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_length) != 8);
902 static const struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
904 const struct lnet_lnd *lnd;
906 /* holding lnd mutex */
907 if (type >= NUM_LNDS)
909 lnd = the_lnet.ln_lnds[type];
910 LASSERT(!lnd || lnd->lnd_type == type);
916 lnet_get_lnd_timeout(void)
918 return lnet_lnd_timeout;
920 EXPORT_SYMBOL(lnet_get_lnd_timeout);
923 lnet_register_lnd(const struct lnet_lnd *lnd)
925 mutex_lock(&the_lnet.ln_lnd_mutex);
927 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
928 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
930 the_lnet.ln_lnds[lnd->lnd_type] = lnd;
932 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
934 mutex_unlock(&the_lnet.ln_lnd_mutex);
936 EXPORT_SYMBOL(lnet_register_lnd);
939 lnet_unregister_lnd(const struct lnet_lnd *lnd)
941 mutex_lock(&the_lnet.ln_lnd_mutex);
943 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
945 the_lnet.ln_lnds[lnd->lnd_type] = NULL;
946 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
948 mutex_unlock(&the_lnet.ln_lnd_mutex);
950 EXPORT_SYMBOL(lnet_unregister_lnd);
953 lnet_counters_get_common_locked(struct lnet_counters_common *common)
955 struct lnet_counters *ctr;
958 /* FIXME !!! Their is no assert_lnet_net_locked() to ensure this
959 * actually called under the protection of the lnet_net_lock.
961 memset(common, 0, sizeof(*common));
963 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
964 common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
965 common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
966 common->lcc_errors += ctr->lct_common.lcc_errors;
967 common->lcc_send_count += ctr->lct_common.lcc_send_count;
968 common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
969 common->lcc_route_count += ctr->lct_common.lcc_route_count;
970 common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
971 common->lcc_send_length += ctr->lct_common.lcc_send_length;
972 common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
973 common->lcc_route_length += ctr->lct_common.lcc_route_length;
974 common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
979 lnet_counters_get_common(struct lnet_counters_common *common)
981 lnet_net_lock(LNET_LOCK_EX);
982 lnet_counters_get_common_locked(common);
983 lnet_net_unlock(LNET_LOCK_EX);
985 EXPORT_SYMBOL(lnet_counters_get_common);
988 lnet_counters_get(struct lnet_counters *counters)
990 struct lnet_counters *ctr;
991 struct lnet_counters_health *health = &counters->lct_health;
994 memset(counters, 0, sizeof(*counters));
996 lnet_net_lock(LNET_LOCK_EX);
998 if (the_lnet.ln_state != LNET_STATE_RUNNING)
999 GOTO(out_unlock, rc = -ENODEV);
1001 lnet_counters_get_common_locked(&counters->lct_common);
1003 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
1004 health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
1005 health->lch_resend_count += ctr->lct_health.lch_resend_count;
1006 health->lch_response_timeout_count +=
1007 ctr->lct_health.lch_response_timeout_count;
1008 health->lch_local_interrupt_count +=
1009 ctr->lct_health.lch_local_interrupt_count;
1010 health->lch_local_dropped_count +=
1011 ctr->lct_health.lch_local_dropped_count;
1012 health->lch_local_aborted_count +=
1013 ctr->lct_health.lch_local_aborted_count;
1014 health->lch_local_no_route_count +=
1015 ctr->lct_health.lch_local_no_route_count;
1016 health->lch_local_timeout_count +=
1017 ctr->lct_health.lch_local_timeout_count;
1018 health->lch_local_error_count +=
1019 ctr->lct_health.lch_local_error_count;
1020 health->lch_remote_dropped_count +=
1021 ctr->lct_health.lch_remote_dropped_count;
1022 health->lch_remote_error_count +=
1023 ctr->lct_health.lch_remote_error_count;
1024 health->lch_remote_timeout_count +=
1025 ctr->lct_health.lch_remote_timeout_count;
1026 health->lch_network_timeout_count +=
1027 ctr->lct_health.lch_network_timeout_count;
1030 lnet_net_unlock(LNET_LOCK_EX);
1033 EXPORT_SYMBOL(lnet_counters_get);
1036 lnet_counters_reset(void)
1038 struct lnet_counters *counters;
1041 lnet_net_lock(LNET_LOCK_EX);
1043 if (the_lnet.ln_state != LNET_STATE_RUNNING)
1046 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
1047 memset(counters, 0, sizeof(struct lnet_counters));
1049 lnet_net_unlock(LNET_LOCK_EX);
1053 lnet_res_type2str(int type)
1058 case LNET_COOKIE_TYPE_MD:
1060 case LNET_COOKIE_TYPE_ME:
1062 case LNET_COOKIE_TYPE_EQ:
1068 lnet_res_container_cleanup(struct lnet_res_container *rec)
1072 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
1075 while (!list_empty(&rec->rec_active)) {
1076 struct list_head *e = rec->rec_active.next;
1079 if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
1080 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
1082 } else { /* NB: Active MEs should be attached on portals */
1089 /* Found alive MD/ME/EQ, user really should unlink/free
1090 * all of them before finalize LNet, but if someone didn't,
1091 * we have to recycle garbage for him */
1092 CERROR("%d active elements on exit of %s container\n",
1093 count, lnet_res_type2str(rec->rec_type));
1096 if (rec->rec_lh_hash != NULL) {
1097 CFS_FREE_PTR_ARRAY(rec->rec_lh_hash, LNET_LH_HASH_SIZE);
1098 rec->rec_lh_hash = NULL;
1101 rec->rec_type = 0; /* mark it as finalized */
1105 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
1110 LASSERT(rec->rec_type == 0);
1112 rec->rec_type = type;
1113 INIT_LIST_HEAD(&rec->rec_active);
1115 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
1117 /* Arbitrary choice of hash table size */
1118 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
1119 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
1120 if (rec->rec_lh_hash == NULL) {
1125 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
1126 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
1131 CERROR("Failed to setup %s resource container\n",
1132 lnet_res_type2str(type));
1133 lnet_res_container_cleanup(rec);
1138 lnet_res_containers_destroy(struct lnet_res_container **recs)
1140 struct lnet_res_container *rec;
1143 cfs_percpt_for_each(rec, i, recs)
1144 lnet_res_container_cleanup(rec);
1146 cfs_percpt_free(recs);
1149 static struct lnet_res_container **
1150 lnet_res_containers_create(int type)
1152 struct lnet_res_container **recs;
1153 struct lnet_res_container *rec;
1157 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
1159 CERROR("Failed to allocate %s resource containers\n",
1160 lnet_res_type2str(type));
1164 cfs_percpt_for_each(rec, i, recs) {
1165 rc = lnet_res_container_setup(rec, i, type);
1167 lnet_res_containers_destroy(recs);
1175 struct lnet_libhandle *
1176 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
1178 /* ALWAYS called with lnet_res_lock held */
1179 struct list_head *head;
1180 struct lnet_libhandle *lh;
1183 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
1186 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
1187 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
1189 list_for_each_entry(lh, head, lh_hash_chain) {
1190 if (lh->lh_cookie == cookie)
1198 lnet_res_lh_initialize(struct lnet_res_container *rec,
1199 struct lnet_libhandle *lh)
1201 /* ALWAYS called with lnet_res_lock held */
1202 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
1205 lh->lh_cookie = rec->rec_lh_cookie;
1206 rec->rec_lh_cookie += 1 << ibits;
1208 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
1210 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
1214 lnet_create_array_of_queues(void)
1216 struct list_head **qs;
1217 struct list_head *q;
1220 qs = cfs_percpt_alloc(lnet_cpt_table(),
1221 sizeof(struct list_head));
1223 CERROR("Failed to allocate queues\n");
1227 cfs_percpt_for_each(q, i, qs)
1233 static int lnet_unprepare(void);
1236 lnet_prepare(lnet_pid_t requested_pid)
1238 /* Prepare to bring up the network */
1239 struct lnet_res_container **recs;
1242 if (requested_pid == LNET_PID_ANY) {
1243 /* Don't instantiate LNET just for me */
1247 LASSERT(the_lnet.ln_refcount == 0);
1249 the_lnet.ln_routing = 0;
1251 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
1252 the_lnet.ln_pid = requested_pid;
1254 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
1255 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
1256 INIT_LIST_HEAD(&the_lnet.ln_nets);
1257 INIT_LIST_HEAD(&the_lnet.ln_routers);
1258 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
1259 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
1260 INIT_LIST_HEAD(&the_lnet.ln_dc_request);
1261 INIT_LIST_HEAD(&the_lnet.ln_dc_working);
1262 INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
1263 INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
1264 INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
1265 INIT_LIST_HEAD(&the_lnet.ln_udsp_list);
1266 init_waitqueue_head(&the_lnet.ln_dc_waitq);
1267 the_lnet.ln_mt_handler = NULL;
1268 init_completion(&the_lnet.ln_started);
1270 rc = lnet_slab_setup();
1274 rc = lnet_create_remote_nets_table();
1279 * NB the interface cookie in wire handles guards against delayed
1280 * replies and ACKs appearing valid after reboot.
1282 the_lnet.ln_interface_cookie = ktime_get_real_ns();
1284 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
1285 sizeof(struct lnet_counters));
1286 if (the_lnet.ln_counters == NULL) {
1287 CERROR("Failed to allocate counters for LNet\n");
1292 rc = lnet_peer_tables_create();
1296 rc = lnet_msg_containers_create();
1300 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
1301 LNET_COOKIE_TYPE_EQ);
1305 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
1311 the_lnet.ln_md_containers = recs;
1313 rc = lnet_portals_create();
1315 CERROR("Failed to create portals for LNet: %d\n", rc);
1319 the_lnet.ln_mt_zombie_rstqs = lnet_create_array_of_queues();
1320 if (!the_lnet.ln_mt_zombie_rstqs) {
1333 lnet_unprepare (void)
1335 /* NB no LNET_LOCK since this is the last reference. All LND instances
1336 * have shut down already, so it is safe to unlink and free all
1337 * descriptors, even those that appear committed to a network op (eg MD
1338 * with non-zero pending count) */
1340 lnet_fail_nid(LNET_NID_ANY, 0);
1342 LASSERT(the_lnet.ln_refcount == 0);
1343 LASSERT(list_empty(&the_lnet.ln_test_peers));
1344 LASSERT(list_empty(&the_lnet.ln_nets));
1346 if (the_lnet.ln_mt_zombie_rstqs) {
1347 lnet_clean_zombie_rstqs();
1348 the_lnet.ln_mt_zombie_rstqs = NULL;
1351 lnet_assert_handler_unused(the_lnet.ln_mt_handler);
1352 the_lnet.ln_mt_handler = NULL;
1354 lnet_portals_destroy();
1356 if (the_lnet.ln_md_containers != NULL) {
1357 lnet_res_containers_destroy(the_lnet.ln_md_containers);
1358 the_lnet.ln_md_containers = NULL;
1361 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
1363 lnet_msg_containers_destroy();
1365 lnet_rtrpools_free(0);
1367 if (the_lnet.ln_counters != NULL) {
1368 cfs_percpt_free(the_lnet.ln_counters);
1369 the_lnet.ln_counters = NULL;
1371 lnet_destroy_remote_nets_table();
1372 lnet_udsp_destroy(true);
1373 lnet_slab_cleanup();
1379 lnet_net2ni_locked(__u32 net_id, int cpt)
1382 struct lnet_net *net;
1384 LASSERT(cpt != LNET_LOCK_EX);
1386 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1387 if (net->net_id == net_id) {
1388 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
1398 lnet_net2ni_addref(__u32 net)
1403 ni = lnet_net2ni_locked(net, 0);
1405 lnet_ni_addref_locked(ni, 0);
1410 EXPORT_SYMBOL(lnet_net2ni_addref);
1413 lnet_get_net_locked(__u32 net_id)
1415 struct lnet_net *net;
1417 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1418 if (net->net_id == net_id)
1426 lnet_net_clr_pref_rtrs(struct lnet_net *net)
1428 struct list_head zombies;
1429 struct lnet_nid_list *ne;
1430 struct lnet_nid_list *tmp;
1432 INIT_LIST_HEAD(&zombies);
1434 lnet_net_lock(LNET_LOCK_EX);
1435 list_splice_init(&net->net_rtr_pref_nids, &zombies);
1436 lnet_net_unlock(LNET_LOCK_EX);
1438 list_for_each_entry_safe(ne, tmp, &zombies, nl_list) {
1439 list_del_init(&ne->nl_list);
1440 LIBCFS_FREE(ne, sizeof(*ne));
1445 lnet_net_add_pref_rtr(struct lnet_net *net,
1447 __must_hold(&the_lnet.ln_api_mutex)
1449 struct lnet_nid_list *ne;
1451 /* This function is called with api_mutex held. When the api_mutex
1452 * is held the list can not be modified, as it is only modified as
1453 * a result of applying a UDSP and that happens under api_mutex
1456 list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
1457 if (ne->nl_nid == gw_nid)
1461 LIBCFS_ALLOC(ne, sizeof(*ne));
1465 ne->nl_nid = gw_nid;
1467 /* Lock the cpt to protect against addition and checks in the
1468 * selection algorithm
1470 lnet_net_lock(LNET_LOCK_EX);
1471 list_add(&ne->nl_list, &net->net_rtr_pref_nids);
1472 lnet_net_unlock(LNET_LOCK_EX);
1478 lnet_net_is_pref_rtr_locked(struct lnet_net *net, lnet_nid_t rtr_nid)
1480 struct lnet_nid_list *ne;
1482 CDEBUG(D_NET, "%s: rtr pref emtpy: %d\n",
1483 libcfs_net2str(net->net_id),
1484 list_empty(&net->net_rtr_pref_nids));
1486 if (list_empty(&net->net_rtr_pref_nids))
1489 list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
1490 CDEBUG(D_NET, "Comparing pref %s with gw %s\n",
1491 libcfs_nid2str(ne->nl_nid),
1492 libcfs_nid2str(rtr_nid));
1493 if (rtr_nid == ne->nl_nid)
1501 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
1506 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
1511 val = hash_long(key, LNET_CPT_BITS);
1512 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
1516 return (unsigned int)(key + val + (val >> 1)) % number;
1520 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
1522 struct lnet_net *net;
1524 /* must called with hold of lnet_net_lock */
1525 if (LNET_CPT_NUMBER == 1)
1526 return 0; /* the only one */
1529 * If NI is provided then use the CPT identified in the NI cpt
1530 * list if one exists. If one doesn't exist, then that NI is
1531 * associated with all CPTs and it follows that the net it belongs
1532 * to is implicitly associated with all CPTs, so just hash the nid
1536 if (ni->ni_cpts != NULL)
1537 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
1540 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1543 /* no NI provided so look at the net */
1544 net = lnet_get_net_locked(LNET_NIDNET(nid));
1546 if (net != NULL && net->net_cpts != NULL) {
1547 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
1550 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1554 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
1559 if (LNET_CPT_NUMBER == 1)
1560 return 0; /* the only one */
1562 cpt = lnet_net_lock_current();
1564 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
1566 lnet_net_unlock(cpt);
1570 EXPORT_SYMBOL(lnet_cpt_of_nid);
1573 lnet_islocalnet_locked(__u32 net_id)
1575 struct lnet_net *net;
1578 net = lnet_get_net_locked(net_id);
1580 local = net != NULL;
1586 lnet_islocalnet(__u32 net_id)
1591 cpt = lnet_net_lock_current();
1593 local = lnet_islocalnet_locked(net_id);
1595 lnet_net_unlock(cpt);
1601 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
1603 struct lnet_net *net;
1606 LASSERT(cpt != LNET_LOCK_EX);
1608 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1609 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1610 if (ni->ni_nid == nid)
1619 lnet_nid2ni_addref(lnet_nid_t nid)
1624 ni = lnet_nid2ni_locked(nid, 0);
1626 lnet_ni_addref_locked(ni, 0);
1631 EXPORT_SYMBOL(lnet_nid2ni_addref);
1634 lnet_islocalnid(lnet_nid_t nid)
1639 cpt = lnet_net_lock_current();
1640 ni = lnet_nid2ni_locked(nid, cpt);
1641 lnet_net_unlock(cpt);
1647 lnet_count_acceptor_nets(void)
1649 /* Return the # of NIs that need the acceptor. */
1651 struct lnet_net *net;
1654 cpt = lnet_net_lock_current();
1655 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1656 /* all socklnd type networks should have the acceptor
1658 if (net->net_lnd->lnd_accept != NULL)
1662 lnet_net_unlock(cpt);
1667 struct lnet_ping_buffer *
1668 lnet_ping_buffer_alloc(int nnis, gfp_t gfp)
1670 struct lnet_ping_buffer *pbuf;
1672 LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nnis), gfp);
1674 pbuf->pb_nnis = nnis;
1675 pbuf->pb_needs_post = false;
1676 atomic_set(&pbuf->pb_refcnt, 1);
1683 lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf)
1685 LASSERT(atomic_read(&pbuf->pb_refcnt) == 0);
1686 LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nnis));
1689 static struct lnet_ping_buffer *
1690 lnet_ping_target_create(int nnis)
1692 struct lnet_ping_buffer *pbuf;
1694 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1696 CERROR("Can't allocate ping source [%d]\n", nnis);
1700 pbuf->pb_info.pi_nnis = nnis;
1701 pbuf->pb_info.pi_pid = the_lnet.ln_pid;
1702 pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
1703 pbuf->pb_info.pi_features =
1704 LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
1710 lnet_get_net_ni_count_locked(struct lnet_net *net)
1715 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1722 lnet_get_net_ni_count_pre(struct lnet_net *net)
1727 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1734 lnet_get_ni_count(void)
1737 struct lnet_net *net;
1742 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1743 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1753 lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
1755 struct lnet_ni_status *stat;
1759 __swab32s(&pbuf->pb_info.pi_magic);
1760 __swab32s(&pbuf->pb_info.pi_features);
1761 __swab32s(&pbuf->pb_info.pi_pid);
1762 __swab32s(&pbuf->pb_info.pi_nnis);
1763 nnis = pbuf->pb_info.pi_nnis;
1764 if (nnis > pbuf->pb_nnis)
1765 nnis = pbuf->pb_nnis;
1766 for (i = 0; i < nnis; i++) {
1767 stat = &pbuf->pb_info.pi_ni[i];
1768 __swab64s(&stat->ns_nid);
1769 __swab32s(&stat->ns_status);
1774 lnet_ping_info_validate(struct lnet_ping_info *pinfo)
1778 if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
1780 if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
1782 /* Loopback is guaranteed to be present */
1783 if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
1785 if (LNET_PING_INFO_LONI(pinfo) != LNET_NID_LO_0)
1791 lnet_ping_target_destroy(void)
1793 struct lnet_net *net;
1796 lnet_net_lock(LNET_LOCK_EX);
1798 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1799 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1801 ni->ni_status = NULL;
1806 lnet_ping_buffer_decref(the_lnet.ln_ping_target);
1807 the_lnet.ln_ping_target = NULL;
1809 lnet_net_unlock(LNET_LOCK_EX);
1813 lnet_ping_target_event_handler(struct lnet_event *event)
1815 struct lnet_ping_buffer *pbuf = event->md_user_ptr;
1817 if (event->unlinked)
1818 lnet_ping_buffer_decref(pbuf);
1822 lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
1823 struct lnet_handle_md *ping_mdh,
1824 int ni_count, bool set_eq)
1826 struct lnet_process_id id = {
1827 .nid = LNET_NID_ANY,
1831 struct lnet_md md = { NULL };
1835 the_lnet.ln_ping_target_handler =
1836 lnet_ping_target_event_handler;
1838 *ppbuf = lnet_ping_target_create(ni_count);
1839 if (*ppbuf == NULL) {
1844 /* Ping target ME/MD */
1845 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1846 LNET_PROTO_PING_MATCHBITS, 0,
1847 LNET_UNLINK, LNET_INS_AFTER);
1850 CERROR("Can't create ping target ME: %d\n", rc);
1851 goto fail_decref_ping_buffer;
1854 /* initialize md content */
1855 md.start = &(*ppbuf)->pb_info;
1856 md.length = LNET_PING_INFO_SIZE((*ppbuf)->pb_nnis);
1857 md.threshold = LNET_MD_THRESH_INF;
1859 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1860 LNET_MD_MANAGE_REMOTE;
1861 md.handler = the_lnet.ln_ping_target_handler;
1862 md.user_ptr = *ppbuf;
1864 rc = LNetMDAttach(me, &md, LNET_RETAIN, ping_mdh);
1866 CERROR("Can't attach ping target MD: %d\n", rc);
1867 goto fail_decref_ping_buffer;
1869 lnet_ping_buffer_addref(*ppbuf);
1873 fail_decref_ping_buffer:
1874 LASSERT(atomic_read(&(*ppbuf)->pb_refcnt) == 1);
1875 lnet_ping_buffer_decref(*ppbuf);
1882 lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
1883 struct lnet_handle_md *ping_mdh)
1885 LNetMDUnlink(*ping_mdh);
1886 LNetInvalidateMDHandle(ping_mdh);
1888 /* NB the MD could be busy; this just starts the unlink */
1889 wait_var_event_warning(&pbuf->pb_refcnt,
1890 atomic_read(&pbuf->pb_refcnt) <= 1,
1891 "Still waiting for ping data MD to unlink\n");
1895 lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
1898 struct lnet_net *net;
1899 struct lnet_ni_status *ns;
1904 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1905 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1906 LASSERT(i < pbuf->pb_nnis);
1908 ns = &pbuf->pb_info.pi_ni[i];
1910 ns->ns_nid = ni->ni_nid;
1913 ns->ns_status = lnet_ni_get_status_locked(ni);
1921 * We (ab)use the ns_status of the loopback interface to
1922 * transmit the sequence number. The first interface listed
1923 * must be the loopback interface.
1925 rc = lnet_ping_info_validate(&pbuf->pb_info);
1927 LCONSOLE_EMERG("Invalid ping target: %d\n", rc);
1930 LNET_PING_BUFFER_SEQNO(pbuf) =
1931 atomic_inc_return(&the_lnet.ln_ping_target_seqno);
1935 lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
1936 struct lnet_handle_md ping_mdh)
1938 struct lnet_ping_buffer *old_pbuf = NULL;
1939 struct lnet_handle_md old_ping_md;
1941 /* switch the NIs to point to the new ping info created */
1942 lnet_net_lock(LNET_LOCK_EX);
1944 if (!the_lnet.ln_routing)
1945 pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1946 if (!lnet_peer_discovery_disabled)
1947 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
1949 /* Ensure only known feature bits have been set. */
1950 LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
1951 LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
1953 lnet_ping_target_install_locked(pbuf);
1955 if (the_lnet.ln_ping_target) {
1956 old_pbuf = the_lnet.ln_ping_target;
1957 old_ping_md = the_lnet.ln_ping_target_md;
1959 the_lnet.ln_ping_target_md = ping_mdh;
1960 the_lnet.ln_ping_target = pbuf;
1962 lnet_net_unlock(LNET_LOCK_EX);
1965 /* unlink and free the old ping info */
1966 lnet_ping_md_unlink(old_pbuf, &old_ping_md);
1967 lnet_ping_buffer_decref(old_pbuf);
1970 lnet_push_update_to_peers(0);
1974 lnet_ping_target_fini(void)
1976 lnet_ping_md_unlink(the_lnet.ln_ping_target,
1977 &the_lnet.ln_ping_target_md);
1979 lnet_assert_handler_unused(the_lnet.ln_ping_target_handler);
1980 lnet_ping_target_destroy();
1983 /* Resize the push target. */
1984 int lnet_push_target_resize(void)
1986 struct lnet_handle_md mdh;
1987 struct lnet_handle_md old_mdh;
1988 struct lnet_ping_buffer *pbuf;
1989 struct lnet_ping_buffer *old_pbuf;
1994 nnis = the_lnet.ln_push_target_nnis;
1996 CDEBUG(D_NET, "Invalid nnis %d\n", nnis);
2000 /* NB: lnet_ping_buffer_alloc() sets pbuf refcount to 1. That ref is
2001 * dropped when we need to resize again (see "old_pbuf" below) or when
2002 * LNet is shutdown (see lnet_push_target_fini())
2004 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
2006 CDEBUG(D_NET, "Can't allocate pbuf for nnis %d\n", nnis);
2010 rc = lnet_push_target_post(pbuf, &mdh);
2012 CDEBUG(D_NET, "Failed to post push target: %d\n", rc);
2013 lnet_ping_buffer_decref(pbuf);
2017 lnet_net_lock(LNET_LOCK_EX);
2018 old_pbuf = the_lnet.ln_push_target;
2019 old_mdh = the_lnet.ln_push_target_md;
2020 the_lnet.ln_push_target = pbuf;
2021 the_lnet.ln_push_target_md = mdh;
2022 lnet_net_unlock(LNET_LOCK_EX);
2025 LNetMDUnlink(old_mdh);
2026 /* Drop ref set by lnet_ping_buffer_alloc() */
2027 lnet_ping_buffer_decref(old_pbuf);
2030 /* Received another push or reply that requires a larger buffer */
2031 if (nnis < the_lnet.ln_push_target_nnis)
2034 CDEBUG(D_NET, "nnis %d success\n", nnis);
2038 int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
2039 struct lnet_handle_md *mdhp)
2041 struct lnet_process_id id = { LNET_NID_ANY, LNET_PID_ANY };
2042 struct lnet_md md = { NULL };
2046 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
2047 LNET_PROTO_PING_MATCHBITS, 0,
2048 LNET_UNLINK, LNET_INS_AFTER);
2051 CERROR("Can't create push target ME: %d\n", rc);
2055 pbuf->pb_needs_post = false;
2057 /* This reference is dropped by lnet_push_target_event_handler() */
2058 lnet_ping_buffer_addref(pbuf);
2060 /* initialize md content */
2061 md.start = &pbuf->pb_info;
2062 md.length = LNET_PING_INFO_SIZE(pbuf->pb_nnis);
2065 md.options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE;
2067 md.handler = the_lnet.ln_push_target_handler;
2069 rc = LNetMDAttach(me, &md, LNET_UNLINK, mdhp);
2071 CERROR("Can't attach push MD: %d\n", rc);
2072 lnet_ping_buffer_decref(pbuf);
2073 pbuf->pb_needs_post = true;
2077 CDEBUG(D_NET, "posted push target %p\n", pbuf);
2082 static void lnet_push_target_event_handler(struct lnet_event *ev)
2084 struct lnet_ping_buffer *pbuf = ev->md_user_ptr;
2086 CDEBUG(D_NET, "type %d status %d unlinked %d\n", ev->type, ev->status,
2089 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
2090 lnet_swap_pinginfo(pbuf);
2092 if (ev->type == LNET_EVENT_UNLINK) {
2093 /* Drop ref added by lnet_push_target_post() */
2094 lnet_ping_buffer_decref(pbuf);
2098 lnet_peer_push_event(ev);
2100 /* Drop ref added by lnet_push_target_post */
2101 lnet_ping_buffer_decref(pbuf);
2104 /* Initialize the push target. */
2105 static int lnet_push_target_init(void)
2109 if (the_lnet.ln_push_target)
2112 the_lnet.ln_push_target_handler =
2113 lnet_push_target_event_handler;
2115 rc = LNetSetLazyPortal(LNET_RESERVED_PORTAL);
2118 /* Start at the required minimum, we'll enlarge if required. */
2119 the_lnet.ln_push_target_nnis = LNET_INTERFACES_MIN;
2121 rc = lnet_push_target_resize();
2124 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2125 the_lnet.ln_push_target_handler = NULL;
2131 /* Clean up the push target. */
2132 static void lnet_push_target_fini(void)
2134 if (!the_lnet.ln_push_target)
2137 /* Unlink and invalidate to prevent new references. */
2138 LNetMDUnlink(the_lnet.ln_push_target_md);
2139 LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
2141 /* Wait for the unlink to complete. */
2142 wait_var_event_warning(&the_lnet.ln_push_target->pb_refcnt,
2143 atomic_read(&the_lnet.ln_push_target->pb_refcnt) <= 1,
2144 "Still waiting for ping data MD to unlink\n");
2146 /* Drop ref set by lnet_ping_buffer_alloc() */
2147 lnet_ping_buffer_decref(the_lnet.ln_push_target);
2148 the_lnet.ln_push_target = NULL;
2149 the_lnet.ln_push_target_nnis = 0;
2151 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2152 lnet_assert_handler_unused(the_lnet.ln_push_target_handler);
2153 the_lnet.ln_push_target_handler = NULL;
2157 lnet_ni_tq_credits(struct lnet_ni *ni)
2161 LASSERT(ni->ni_ncpts >= 1);
2163 if (ni->ni_ncpts == 1)
2164 return ni->ni_net->net_tunables.lct_max_tx_credits;
2166 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
2167 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
2168 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
2174 lnet_ni_unlink_locked(struct lnet_ni *ni)
2176 /* move it to zombie list and nobody can find it anymore */
2177 LASSERT(!list_empty(&ni->ni_netlist));
2178 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
2179 lnet_ni_decref_locked(ni, 0);
2183 lnet_clear_zombies_nis_locked(struct lnet_net *net)
2188 struct list_head *zombie_list = &net->net_ni_zombie;
2191 * Now wait for the NIs I just nuked to show up on the zombie
2192 * list and shut them down in guaranteed thread context
2195 while (!list_empty(zombie_list)) {
2199 ni = list_entry(zombie_list->next,
2200 struct lnet_ni, ni_netlist);
2201 list_del_init(&ni->ni_netlist);
2202 /* the ni should be in deleting state. If it's not it's
2204 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
2205 cfs_percpt_for_each(ref, j, ni->ni_refs) {
2208 /* still busy, add it back to zombie list */
2209 list_add(&ni->ni_netlist, zombie_list);
2213 if (!list_empty(&ni->ni_netlist)) {
2214 /* Unlock mutex while waiting to allow other
2215 * threads to read the LNet state and fall through
2218 lnet_net_unlock(LNET_LOCK_EX);
2219 mutex_unlock(&the_lnet.ln_api_mutex);
2222 if ((i & (-i)) == i) {
2224 "Waiting for zombie LNI %s\n",
2225 libcfs_nid2str(ni->ni_nid));
2227 schedule_timeout_uninterruptible(cfs_time_seconds(1));
2229 mutex_lock(&the_lnet.ln_api_mutex);
2230 lnet_net_lock(LNET_LOCK_EX);
2234 lnet_net_unlock(LNET_LOCK_EX);
2236 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
2238 LASSERT(!in_interrupt());
2239 /* Holding the mutex makes it safe for lnd_shutdown
2240 * to call module_put(). Module unload cannot finish
2241 * until lnet_unregister_lnd() completes, and that
2242 * requires the mutex.
2244 mutex_lock(&the_lnet.ln_lnd_mutex);
2245 (net->net_lnd->lnd_shutdown)(ni);
2246 mutex_unlock(&the_lnet.ln_lnd_mutex);
2249 CDEBUG(D_LNI, "Removed LNI %s\n",
2250 libcfs_nid2str(ni->ni_nid));
2254 lnet_net_lock(LNET_LOCK_EX);
2258 /* shutdown down the NI and release refcount */
2260 lnet_shutdown_lndni(struct lnet_ni *ni)
2263 struct lnet_net *net = ni->ni_net;
2265 lnet_net_lock(LNET_LOCK_EX);
2267 ni->ni_state = LNET_NI_STATE_DELETING;
2269 lnet_ni_unlink_locked(ni);
2270 lnet_incr_dlc_seq();
2271 lnet_net_unlock(LNET_LOCK_EX);
2273 /* clear messages for this NI on the lazy portal */
2274 for (i = 0; i < the_lnet.ln_nportals; i++)
2275 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
2277 lnet_net_lock(LNET_LOCK_EX);
2278 lnet_clear_zombies_nis_locked(net);
2279 lnet_net_unlock(LNET_LOCK_EX);
2283 lnet_shutdown_lndnet(struct lnet_net *net)
2287 lnet_net_lock(LNET_LOCK_EX);
2289 list_del_init(&net->net_list);
2291 while (!list_empty(&net->net_ni_list)) {
2292 ni = list_entry(net->net_ni_list.next,
2293 struct lnet_ni, ni_netlist);
2294 lnet_net_unlock(LNET_LOCK_EX);
2295 lnet_shutdown_lndni(ni);
2296 lnet_net_lock(LNET_LOCK_EX);
2299 lnet_net_unlock(LNET_LOCK_EX);
2301 /* Do peer table cleanup for this net */
2302 lnet_peer_tables_cleanup(net);
2308 lnet_shutdown_lndnets(void)
2310 struct lnet_net *net;
2312 struct lnet_msg *msg, *tmp;
2314 /* NB called holding the global mutex */
2316 /* All quiet on the API front */
2317 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
2318 LASSERT(the_lnet.ln_refcount == 0);
2320 lnet_net_lock(LNET_LOCK_EX);
2321 the_lnet.ln_state = LNET_STATE_STOPPING;
2324 * move the nets to the zombie list to avoid them being
2325 * picked up for new work. LONET is also included in the
2326 * Nets that will be moved to the zombie list
2328 list_splice_init(&the_lnet.ln_nets, &the_lnet.ln_net_zombie);
2330 /* Drop the cached loopback Net. */
2331 if (the_lnet.ln_loni != NULL) {
2332 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
2333 the_lnet.ln_loni = NULL;
2335 lnet_net_unlock(LNET_LOCK_EX);
2337 /* iterate through the net zombie list and delete each net */
2338 while (!list_empty(&the_lnet.ln_net_zombie)) {
2339 net = list_entry(the_lnet.ln_net_zombie.next,
2340 struct lnet_net, net_list);
2341 lnet_shutdown_lndnet(net);
2344 spin_lock(&the_lnet.ln_msg_resend_lock);
2345 list_splice(&the_lnet.ln_msg_resend, &resend);
2346 spin_unlock(&the_lnet.ln_msg_resend_lock);
2348 list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
2349 list_del_init(&msg->msg_list);
2350 msg->msg_no_resend = true;
2351 lnet_finalize(msg, -ECANCELED);
2354 lnet_net_lock(LNET_LOCK_EX);
2355 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
2356 lnet_net_unlock(LNET_LOCK_EX);
2360 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
2363 struct lnet_tx_queue *tq;
2365 struct lnet_net *net = ni->ni_net;
2367 mutex_lock(&the_lnet.ln_lnd_mutex);
2370 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
2371 ni->ni_lnd_tunables_set = true;
2374 rc = (net->net_lnd->lnd_startup)(ni);
2376 mutex_unlock(&the_lnet.ln_lnd_mutex);
2379 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
2380 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
2385 ni->ni_state = LNET_NI_STATE_ACTIVE;
2388 /* We keep a reference on the loopback net through the loopback NI */
2389 if (net->net_lnd->lnd_type == LOLND) {
2391 LASSERT(the_lnet.ln_loni == NULL);
2392 the_lnet.ln_loni = ni;
2393 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
2394 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
2395 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
2396 ni->ni_net->net_tunables.lct_peer_timeout = 0;
2400 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
2401 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
2402 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
2403 libcfs_lnd2str(net->net_lnd->lnd_type),
2404 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
2406 /* shutdown the NI since if we get here then it must've already
2409 lnet_shutdown_lndni(ni);
2413 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
2414 tq->tq_credits_min =
2415 tq->tq_credits_max =
2416 tq->tq_credits = lnet_ni_tq_credits(ni);
2419 atomic_set(&ni->ni_tx_credits,
2420 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
2421 atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
2423 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
2424 libcfs_nid2str(ni->ni_nid),
2425 ni->ni_net->net_tunables.lct_peer_tx_credits,
2426 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
2427 ni->ni_net->net_tunables.lct_peer_rtr_credits,
2428 ni->ni_net->net_tunables.lct_peer_timeout);
2437 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
2440 struct lnet_net *net_l = NULL;
2441 LIST_HEAD(local_ni_list);
2445 const struct lnet_lnd *lnd;
2447 net->net_tunables.lct_peer_timeout;
2449 net->net_tunables.lct_max_tx_credits;
2450 int peerrtrcredits =
2451 net->net_tunables.lct_peer_rtr_credits;
2454 * make sure that this net is unique. If it isn't then
2455 * we are adding interfaces to an already existing network, and
2456 * 'net' is just a convenient way to pass in the list.
2457 * if it is unique we need to find the LND and load it if
2460 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
2461 lnd_type = LNET_NETTYP(net->net_id);
2463 mutex_lock(&the_lnet.ln_lnd_mutex);
2464 lnd = lnet_find_lnd_by_type(lnd_type);
2467 mutex_unlock(&the_lnet.ln_lnd_mutex);
2468 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
2469 mutex_lock(&the_lnet.ln_lnd_mutex);
2471 lnd = lnet_find_lnd_by_type(lnd_type);
2473 mutex_unlock(&the_lnet.ln_lnd_mutex);
2474 CERROR("Can't load LND %s, module %s, rc=%d\n",
2475 libcfs_lnd2str(lnd_type),
2476 libcfs_lnd2modname(lnd_type), rc);
2477 #ifndef HAVE_MODULE_LOADING_SUPPORT
2478 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
2479 "compiled with kernel module "
2480 "loading support.");
2489 mutex_unlock(&the_lnet.ln_lnd_mutex);
2495 * net_l: if the network being added is unique then net_l
2496 * will point to that network
2497 * if the network being added is not unique then
2498 * net_l points to the existing network.
2500 * When we enter the loop below, we'll pick NIs off he
2501 * network beign added and start them up, then add them to
2502 * a local ni list. Once we've successfully started all
2503 * the NIs then we join the local NI list (of started up
2504 * networks) with the net_l->net_ni_list, which should
2505 * point to the correct network to add the new ni list to
2507 * If any of the new NIs fail to start up, then we want to
2508 * iterate through the local ni list, which should include
2509 * any NIs which were successfully started up, and shut
2512 * After than we want to delete the network being added,
2513 * to avoid a memory leak.
2515 while (!list_empty(&net->net_ni_added)) {
2516 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
2518 list_del_init(&ni->ni_netlist);
2520 /* make sure that the the NI we're about to start
2521 * up is actually unique. if it's not fail. */
2522 if (!lnet_ni_unique_net(&net_l->net_ni_list,
2523 ni->ni_interface)) {
2528 /* adjust the pointer the parent network, just in case it
2529 * the net is a duplicate */
2532 rc = lnet_startup_lndni(ni, tun);
2538 list_add_tail(&ni->ni_netlist, &local_ni_list);
2543 lnet_net_lock(LNET_LOCK_EX);
2544 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
2545 lnet_incr_dlc_seq();
2546 lnet_net_unlock(LNET_LOCK_EX);
2548 /* if the network is not unique then we don't want to keep
2549 * it around after we're done. Free it. Otherwise add that
2550 * net to the global the_lnet.ln_nets */
2551 if (net_l != net && net_l != NULL) {
2553 * TODO - note. currently the tunables can not be updated
2559 * restore tunables after it has been overwitten by the
2562 if (peer_timeout != -1)
2563 net->net_tunables.lct_peer_timeout = peer_timeout;
2564 if (maxtxcredits != -1)
2565 net->net_tunables.lct_max_tx_credits = maxtxcredits;
2566 if (peerrtrcredits != -1)
2567 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
2569 lnet_net_lock(LNET_LOCK_EX);
2570 list_add_tail(&net->net_list, &the_lnet.ln_nets);
2571 lnet_net_unlock(LNET_LOCK_EX);
2578 * shutdown the new NIs that are being started up
2579 * free the NET being started
2581 while (!list_empty(&local_ni_list)) {
2582 ni = list_entry(local_ni_list.next, struct lnet_ni,
2585 lnet_shutdown_lndni(ni);
2595 lnet_startup_lndnets(struct list_head *netlist)
2597 struct lnet_net *net;
2602 * Change to running state before bringing up the LNDs. This
2603 * allows lnet_shutdown_lndnets() to assert that we've passed
2606 lnet_net_lock(LNET_LOCK_EX);
2607 the_lnet.ln_state = LNET_STATE_RUNNING;
2608 lnet_net_unlock(LNET_LOCK_EX);
2610 while (!list_empty(netlist)) {
2611 net = list_entry(netlist->next, struct lnet_net, net_list);
2612 list_del_init(&net->net_list);
2614 rc = lnet_startup_lndnet(net, NULL);
2624 lnet_shutdown_lndnets();
2629 static int lnet_genl_parse_list(struct sk_buff *msg,
2630 const struct ln_key_list *data[], u16 idx)
2632 const struct ln_key_list *list = data[idx];
2633 const struct ln_key_props *props;
2634 struct nlattr *node;
2640 if (!list->lkl_maxattr)
2643 props = list->lkl_list;
2647 node = nla_nest_start(msg, LN_SCALAR_ATTR_LIST);
2651 for (count = 1; count <= list->lkl_maxattr; count++) {
2652 struct nlattr *key = nla_nest_start(msg, count);
2655 nla_put_u16(msg, LN_SCALAR_ATTR_LIST_SIZE,
2658 nla_put_u16(msg, LN_SCALAR_ATTR_INDEX, count);
2659 if (props[count].lkp_values)
2660 nla_put_string(msg, LN_SCALAR_ATTR_VALUE,
2661 props[count].lkp_values);
2662 if (props[count].lkp_key_format)
2663 nla_put_u16(msg, LN_SCALAR_ATTR_KEY_FORMAT,
2664 props[count].lkp_key_format);
2665 nla_put_u16(msg, LN_SCALAR_ATTR_NLA_TYPE,
2666 props[count].lkp_data_type);
2667 if (props[count].lkp_data_type == NLA_NESTED) {
2670 rc = lnet_genl_parse_list(msg, data, ++idx);
2675 nla_nest_end(msg, key);
2678 nla_nest_end(msg, node);
2682 int lnet_genl_send_scalar_list(struct sk_buff *msg, u32 portid, u32 seq,
2683 const struct genl_family *family, int flags,
2684 u8 cmd, const struct ln_key_list *data[])
2692 hdr = genlmsg_put(msg, portid, seq, family, flags, cmd);
2694 GOTO(canceled, rc = -EMSGSIZE);
2696 rc = lnet_genl_parse_list(msg, data, 0);
2700 genlmsg_end(msg, hdr);
2703 genlmsg_cancel(msg, hdr);
2706 EXPORT_SYMBOL(lnet_genl_send_scalar_list);
2709 * Initialize LNet library.
2711 * Automatically called at module loading time. Caller has to call
2712 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
2713 * latter returned 0. It must be called exactly once.
2715 * \retval 0 on success
2716 * \retval -ve on failures.
2718 int lnet_lib_init(void)
2722 lnet_assert_wire_constants();
2724 /* refer to global cfs_cpt_table for now */
2725 the_lnet.ln_cpt_table = cfs_cpt_tab;
2726 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_tab);
2728 LASSERT(the_lnet.ln_cpt_number > 0);
2729 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
2730 /* we are under risk of consuming all lh_cookie */
2731 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
2732 "please change setting of CPT-table and retry\n",
2733 the_lnet.ln_cpt_number, LNET_CPT_MAX);
2737 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
2738 the_lnet.ln_cpt_bits++;
2740 rc = lnet_create_locks();
2742 CERROR("Can't create LNet global locks: %d\n", rc);
2746 the_lnet.ln_refcount = 0;
2747 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
2748 INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
2750 /* The hash table size is the number of bits it takes to express the set
2751 * ln_num_routes, minus 1 (better to under estimate than over so we
2752 * don't waste memory). */
2753 if (rnet_htable_size <= 0)
2754 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
2755 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
2756 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
2757 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
2758 order_base_2(rnet_htable_size) - 1);
2760 /* All LNDs apart from the LOLND are in separate modules. They
2761 * register themselves when their module loads, and unregister
2762 * themselves when their module is unloaded. */
2763 lnet_register_lnd(&the_lolnd);
2768 * Finalize LNet library.
2770 * \pre lnet_lib_init() called with success.
2771 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
2773 * As this happens at module-unload, all lnds must already be unloaded,
2774 * so they must already be unregistered.
2776 void lnet_lib_exit(void)
2780 LASSERT(the_lnet.ln_refcount == 0);
2781 lnet_unregister_lnd(&the_lolnd);
2782 for (i = 0; i < NUM_LNDS; i++)
2783 LASSERT(!the_lnet.ln_lnds[i]);
2784 lnet_destroy_locks();
2788 * Set LNet PID and start LNet interfaces, routing, and forwarding.
2790 * Users must call this function at least once before any other functions.
2791 * For each successful call there must be a corresponding call to
2792 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
2795 * The PID used by LNet may be different from the one requested.
2798 * \param requested_pid PID requested by the caller.
2800 * \return >= 0 on success, and < 0 error code on failures.
2803 LNetNIInit(lnet_pid_t requested_pid)
2805 int im_a_router = 0;
2808 struct lnet_ping_buffer *pbuf;
2809 struct lnet_handle_md ping_mdh;
2810 LIST_HEAD(net_head);
2811 struct lnet_net *net;
2813 mutex_lock(&the_lnet.ln_api_mutex);
2815 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
2817 if (the_lnet.ln_refcount > 0) {
2818 rc = the_lnet.ln_refcount++;
2819 mutex_unlock(&the_lnet.ln_api_mutex);
2823 rc = lnet_prepare(requested_pid);
2825 mutex_unlock(&the_lnet.ln_api_mutex);
2829 /* create a network for Loopback network */
2830 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
2833 goto err_empty_list;
2836 /* Add in the loopback NI */
2837 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
2839 goto err_empty_list;
2842 if (use_tcp_bonding)
2843 CWARN("use_tcp_bonding has been removed. Use Multi-Rail and Dynamic Discovery instead, see LU-13641\n");
2845 /* If LNet is being initialized via DLC it is possible
2846 * that the user requests not to load module parameters (ones which
2847 * are supported by DLC) on initialization. Therefore, make sure not
2848 * to load networks, routes and forwarding from module parameters
2849 * in this case. On cleanup in case of failure only clean up
2850 * routes if it has been loaded */
2851 if (!the_lnet.ln_nis_from_mod_params) {
2852 rc = lnet_parse_networks(&net_head, lnet_get_networks());
2854 goto err_empty_list;
2857 ni_count = lnet_startup_lndnets(&net_head);
2860 goto err_empty_list;
2863 if (!the_lnet.ln_nis_from_mod_params) {
2864 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
2866 goto err_shutdown_lndnis;
2868 rc = lnet_rtrpools_alloc(im_a_router);
2870 goto err_destroy_routes;
2873 rc = lnet_acceptor_start();
2875 goto err_destroy_routes;
2877 the_lnet.ln_refcount = 1;
2878 /* Now I may use my own API functions... */
2880 rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_count, true);
2882 goto err_acceptor_stop;
2884 lnet_ping_target_update(pbuf, ping_mdh);
2886 the_lnet.ln_mt_handler = lnet_mt_event_handler;
2888 rc = lnet_push_target_init();
2892 rc = lnet_peer_discovery_start();
2894 goto err_destroy_push_target;
2896 rc = lnet_monitor_thr_start();
2898 goto err_stop_discovery_thr;
2901 lnet_router_debugfs_init();
2903 mutex_unlock(&the_lnet.ln_api_mutex);
2905 complete_all(&the_lnet.ln_started);
2907 /* wait for all routers to start */
2908 lnet_wait_router_start();
2912 err_stop_discovery_thr:
2913 lnet_peer_discovery_stop();
2914 err_destroy_push_target:
2915 lnet_push_target_fini();
2917 lnet_ping_target_fini();
2919 the_lnet.ln_refcount = 0;
2920 lnet_acceptor_stop();
2922 if (!the_lnet.ln_nis_from_mod_params)
2923 lnet_destroy_routes();
2924 err_shutdown_lndnis:
2925 lnet_shutdown_lndnets();
2929 mutex_unlock(&the_lnet.ln_api_mutex);
2930 while (!list_empty(&net_head)) {
2931 struct lnet_net *net;
2933 net = list_entry(net_head.next, struct lnet_net, net_list);
2934 list_del_init(&net->net_list);
2939 EXPORT_SYMBOL(LNetNIInit);
2942 * Stop LNet interfaces, routing, and forwarding.
2944 * Users must call this function once for each successful call to LNetNIInit().
2945 * Once the LNetNIFini() operation has been started, the results of pending
2946 * API operations are undefined.
2948 * \return always 0 for current implementation.
2953 mutex_lock(&the_lnet.ln_api_mutex);
2955 LASSERT(the_lnet.ln_refcount > 0);
2957 if (the_lnet.ln_refcount != 1) {
2958 the_lnet.ln_refcount--;
2960 LASSERT(!the_lnet.ln_niinit_self);
2964 lnet_router_debugfs_fini();
2965 lnet_monitor_thr_stop();
2966 lnet_peer_discovery_stop();
2967 lnet_push_target_fini();
2968 lnet_ping_target_fini();
2970 /* Teardown fns that use my own API functions BEFORE here */
2971 the_lnet.ln_refcount = 0;
2973 lnet_acceptor_stop();
2974 lnet_destroy_routes();
2975 lnet_shutdown_lndnets();
2979 mutex_unlock(&the_lnet.ln_api_mutex);
2982 EXPORT_SYMBOL(LNetNIFini);
2985 * Grabs the ni data from the ni structure and fills the out
2988 * \param[in] ni network interface structure
2989 * \param[out] cfg_ni NI config information
2990 * \param[out] tun network and LND tunables
2993 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
2994 struct lnet_ioctl_config_lnd_tunables *tun,
2995 struct lnet_ioctl_element_stats *stats,
2998 size_t min_size = 0;
3001 if (!ni || !cfg_ni || !tun)
3004 if (ni->ni_interface != NULL) {
3005 strncpy(cfg_ni->lic_ni_intf,
3007 sizeof(cfg_ni->lic_ni_intf));
3010 cfg_ni->lic_nid = ni->ni_nid;
3011 cfg_ni->lic_status = lnet_ni_get_status_locked(ni);
3012 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
3014 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
3017 stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
3018 LNET_STATS_TYPE_SEND);
3019 stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
3020 LNET_STATS_TYPE_RECV);
3021 stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
3022 LNET_STATS_TYPE_DROP);
3026 * tun->lt_tun will always be present, but in order to be
3027 * backwards compatible, we need to deal with the cases when
3028 * tun->lt_tun is smaller than what the kernel has, because it
3029 * comes from an older version of a userspace program, then we'll
3030 * need to copy as much information as we have available space.
3032 min_size = tun_size - sizeof(tun->lt_cmn);
3033 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
3035 /* copy over the cpts */
3036 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
3037 ni->ni_cpts == NULL) {
3038 for (i = 0; i < ni->ni_ncpts; i++)
3039 cfg_ni->lic_cpts[i] = i;
3042 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
3043 i < LNET_MAX_SHOW_NUM_CPT;
3045 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
3047 cfg_ni->lic_ncpts = ni->ni_ncpts;
3051 * NOTE: This is a legacy function left in the code to be backwards
3052 * compatible with older userspace programs. It should eventually be
3055 * Grabs the ni data from the ni structure and fills the out
3058 * \param[in] ni network interface structure
3059 * \param[out] config config information
3062 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
3063 struct lnet_ioctl_config_data *config)
3065 struct lnet_ioctl_net_config *net_config;
3066 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
3067 size_t min_size, tunable_size = 0;
3073 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
3077 if (!ni->ni_interface)
3080 strncpy(net_config->ni_interface,
3082 sizeof(net_config->ni_interface));
3084 config->cfg_nid = ni->ni_nid;
3085 config->cfg_config_u.cfg_net.net_peer_timeout =
3086 ni->ni_net->net_tunables.lct_peer_timeout;
3087 config->cfg_config_u.cfg_net.net_max_tx_credits =
3088 ni->ni_net->net_tunables.lct_max_tx_credits;
3089 config->cfg_config_u.cfg_net.net_peer_tx_credits =
3090 ni->ni_net->net_tunables.lct_peer_tx_credits;
3091 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
3092 ni->ni_net->net_tunables.lct_peer_rtr_credits;
3094 net_config->ni_status = lnet_ni_get_status_locked(ni);
3097 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
3099 for (i = 0; i < num_cpts; i++)
3100 net_config->ni_cpts[i] = ni->ni_cpts[i];
3102 config->cfg_ncpts = num_cpts;
3106 * See if user land tools sent in a newer and larger version
3107 * of struct lnet_tunables than what the kernel uses.
3109 min_size = sizeof(*config) + sizeof(*net_config);
3111 if (config->cfg_hdr.ioc_len > min_size)
3112 tunable_size = config->cfg_hdr.ioc_len - min_size;
3114 /* Don't copy too much data to user space */
3115 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
3116 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
3118 if (lnd_cfg && min_size) {
3119 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
3120 config->cfg_config_u.cfg_net.net_interface_count = 1;
3122 /* Tell user land that kernel side has less data */
3123 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
3124 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
3125 config->cfg_hdr.ioc_len -= min_size;
3131 lnet_get_ni_idx_locked(int idx)
3134 struct lnet_net *net;
3136 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3137 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3146 int lnet_get_net_healthv_locked(struct lnet_net *net)
3149 int best_healthv = 0;
3150 int healthv, ni_fatal;
3152 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3153 healthv = atomic_read(&ni->ni_healthv);
3154 ni_fatal = atomic_read(&ni->ni_fatal_error_on);
3155 if (!ni_fatal && healthv > best_healthv)
3156 best_healthv = healthv;
3159 return best_healthv;
3163 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
3166 struct lnet_net *net = mynet;
3169 * It is possible that the net has been cleaned out while there is
3170 * a message being sent. This function accessed the net without
3171 * checking if the list is empty
3175 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
3177 if (list_empty(&net->net_ni_list))
3179 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3185 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
3186 /* if you reached the end of the ni list and the net is
3187 * specified, then there are no more nis in that net */
3191 /* we reached the end of this net ni list. move to the
3193 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
3194 /* no more nets and no more NIs. */
3197 /* get the next net */
3198 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
3200 if (list_empty(&net->net_ni_list))
3202 /* get the ni on it */
3203 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3209 if (list_empty(&prev->ni_netlist))
3212 /* there are more nis left */
3213 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
3219 lnet_get_net_config(struct lnet_ioctl_config_data *config)
3224 int idx = config->cfg_count;
3226 cpt = lnet_net_lock_current();
3228 ni = lnet_get_ni_idx_locked(idx);
3233 lnet_fill_ni_info_legacy(ni, config);
3237 lnet_net_unlock(cpt);
3242 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
3243 struct lnet_ioctl_config_lnd_tunables *tun,
3244 struct lnet_ioctl_element_stats *stats,
3251 if (!cfg_ni || !tun || !stats)
3254 cpt = lnet_net_lock_current();
3256 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
3261 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
3265 lnet_net_unlock(cpt);
3269 int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
3278 cpt = lnet_net_lock_current();
3280 ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
3283 lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
3287 lnet_net_unlock(cpt);
3292 static int lnet_add_net_common(struct lnet_net *net,
3293 struct lnet_ioctl_config_lnd_tunables *tun)
3295 struct lnet_handle_md ping_mdh;
3296 struct lnet_ping_buffer *pbuf;
3297 struct lnet_remotenet *rnet;
3303 lnet_net_lock(LNET_LOCK_EX);
3304 rnet = lnet_find_rnet_locked(net->net_id);
3305 lnet_net_unlock(LNET_LOCK_EX);
3307 * make sure that the net added doesn't invalidate the current
3308 * configuration LNet is keeping
3311 CERROR("Adding net %s will invalidate routing configuration\n",
3312 libcfs_net2str(net->net_id));
3318 * make sure you calculate the correct number of slots in the ping
3319 * buffer. Since the ping info is a flattened list of all the NIs,
3320 * we should allocate enough slots to accomodate the number of NIs
3321 * which will be added.
3323 * since ni hasn't been configured yet, use
3324 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
3326 net_ni_count = lnet_get_net_ni_count_pre(net);
3328 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3329 net_ni_count + lnet_get_ni_count(),
3337 memcpy(&net->net_tunables,
3338 &tun->lt_cmn, sizeof(net->net_tunables));
3340 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
3342 net_id = net->net_id;
3344 rc = lnet_startup_lndnet(net,
3345 (tun) ? &tun->lt_tun : NULL);
3349 lnet_net_lock(LNET_LOCK_EX);
3350 net = lnet_get_net_locked(net_id);
3353 /* apply the UDSPs */
3354 rc = lnet_udsp_apply_policies_on_net(net);
3356 CERROR("Failed to apply UDSPs on local net %s\n",
3357 libcfs_net2str(net->net_id));
3359 /* At this point we lost track of which NI was just added, so we
3360 * just re-apply the policies on all of the NIs on this net
3362 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3363 rc = lnet_udsp_apply_policies_on_ni(ni);
3365 CERROR("Failed to apply UDSPs on ni %s\n",
3366 libcfs_nid2str(ni->ni_nid));
3368 lnet_net_unlock(LNET_LOCK_EX);
3371 * Start the acceptor thread if this is the first network
3372 * being added that requires the thread.
3374 if (net->net_lnd->lnd_accept) {
3375 rc = lnet_acceptor_start();
3377 /* shutdown the net that we just started */
3378 CERROR("Failed to start up acceptor thread\n");
3379 lnet_shutdown_lndnet(net);
3384 lnet_net_lock(LNET_LOCK_EX);
3385 lnet_peer_net_added(net);
3386 lnet_net_unlock(LNET_LOCK_EX);
3388 lnet_ping_target_update(pbuf, ping_mdh);
3393 lnet_ping_md_unlink(pbuf, &ping_mdh);
3394 lnet_ping_buffer_decref(pbuf);
3399 lnet_set_tune_defaults(struct lnet_ioctl_config_lnd_tunables *tun)
3402 if (!tun->lt_cmn.lct_peer_timeout)
3403 tun->lt_cmn.lct_peer_timeout = DEFAULT_PEER_TIMEOUT;
3404 if (!tun->lt_cmn.lct_peer_tx_credits)
3405 tun->lt_cmn.lct_peer_tx_credits = DEFAULT_PEER_CREDITS;
3406 if (!tun->lt_cmn.lct_max_tx_credits)
3407 tun->lt_cmn.lct_max_tx_credits = DEFAULT_CREDITS;
3411 static int lnet_handle_legacy_ip2nets(char *ip2nets,
3412 struct lnet_ioctl_config_lnd_tunables *tun)
3414 struct lnet_net *net;
3417 LIST_HEAD(net_head);
3419 rc = lnet_parse_ip2nets(&nets, ip2nets);
3423 rc = lnet_parse_networks(&net_head, nets);
3427 lnet_set_tune_defaults(tun);
3429 mutex_lock(&the_lnet.ln_api_mutex);
3430 while (!list_empty(&net_head)) {
3431 net = list_entry(net_head.next, struct lnet_net, net_list);
3432 list_del_init(&net->net_list);
3433 rc = lnet_add_net_common(net, tun);
3439 mutex_unlock(&the_lnet.ln_api_mutex);
3441 while (!list_empty(&net_head)) {
3442 net = list_entry(net_head.next, struct lnet_net, net_list);
3443 list_del_init(&net->net_list);
3449 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
3451 struct lnet_net *net;
3453 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3455 __u32 net_id, lnd_type;
3457 /* get the tunables if they are available */
3458 if (conf->lic_cfg_hdr.ioc_len >=
3459 sizeof(*conf) + sizeof(*tun))
3460 tun = (struct lnet_ioctl_config_lnd_tunables *)
3463 /* handle legacy ip2nets from DLC */
3464 if (conf->lic_legacy_ip2nets[0] != '\0')
3465 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
3468 net_id = LNET_NIDNET(conf->lic_nid);
3469 lnd_type = LNET_NETTYP(net_id);
3471 if (!libcfs_isknown_lnd(lnd_type)) {
3472 CERROR("No valid net and lnd information provided\n");
3476 net = lnet_net_alloc(net_id, NULL);
3480 for (i = 0; i < conf->lic_ncpts; i++) {
3481 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
3485 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
3490 lnet_set_tune_defaults(tun);
3492 mutex_lock(&the_lnet.ln_api_mutex);
3494 rc = lnet_add_net_common(net, tun);
3496 mutex_unlock(&the_lnet.ln_api_mutex);
3501 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
3503 struct lnet_net *net;
3505 __u32 net_id = LNET_NIDNET(conf->lic_nid);
3506 struct lnet_ping_buffer *pbuf;
3507 struct lnet_handle_md ping_mdh;
3512 /* don't allow userspace to shutdown the LOLND */
3513 if (LNET_NETTYP(net_id) == LOLND)
3516 mutex_lock(&the_lnet.ln_api_mutex);
3520 net = lnet_get_net_locked(net_id);
3522 CERROR("net %s not found\n",
3523 libcfs_net2str(net_id));
3528 addr = LNET_NIDADDR(conf->lic_nid);
3530 /* remove the entire net */
3531 net_count = lnet_get_net_ni_count_locked(net);
3535 /* create and link a new ping info, before removing the old one */
3536 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3537 lnet_get_ni_count() - net_count,
3540 goto unlock_api_mutex;
3542 lnet_shutdown_lndnet(net);
3544 lnet_acceptor_stop();
3546 lnet_ping_target_update(pbuf, ping_mdh);
3548 goto unlock_api_mutex;
3551 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
3553 CERROR("nid %s not found\n",
3554 libcfs_nid2str(conf->lic_nid));
3559 net_count = lnet_get_net_ni_count_locked(net);
3563 /* create and link a new ping info, before removing the old one */
3564 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3565 lnet_get_ni_count() - 1, false);
3567 goto unlock_api_mutex;
3569 lnet_shutdown_lndni(ni);
3571 lnet_acceptor_stop();
3573 lnet_ping_target_update(pbuf, ping_mdh);
3575 /* check if the net is empty and remove it if it is */
3577 lnet_shutdown_lndnet(net);
3579 goto unlock_api_mutex;
3584 mutex_unlock(&the_lnet.ln_api_mutex);
3590 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
3591 * They are only expected to be called for unique networks.
3592 * That can be as a result of older DLC library
3593 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
3596 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
3598 struct lnet_net *net;
3599 LIST_HEAD(net_head);
3601 struct lnet_ioctl_config_lnd_tunables tun;
3602 const char *nets = conf->cfg_config_u.cfg_net.net_intf;
3604 /* Create a net/ni structures for the network string */
3605 rc = lnet_parse_networks(&net_head, nets);
3607 return rc == 0 ? -EINVAL : rc;
3609 mutex_lock(&the_lnet.ln_api_mutex);
3612 rc = -EINVAL; /* only add one network per call */
3613 goto out_unlock_clean;
3616 net = list_entry(net_head.next, struct lnet_net, net_list);
3617 list_del_init(&net->net_list);
3619 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
3621 memset(&tun, 0, sizeof(tun));
3623 tun.lt_cmn.lct_peer_timeout =
3624 (!conf->cfg_config_u.cfg_net.net_peer_timeout) ? DEFAULT_PEER_TIMEOUT :
3625 conf->cfg_config_u.cfg_net.net_peer_timeout;
3626 tun.lt_cmn.lct_peer_tx_credits =
3627 (!conf->cfg_config_u.cfg_net.net_peer_tx_credits) ? DEFAULT_PEER_CREDITS :
3628 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
3629 tun.lt_cmn.lct_peer_rtr_credits =
3630 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
3631 tun.lt_cmn.lct_max_tx_credits =
3632 (!conf->cfg_config_u.cfg_net.net_max_tx_credits) ? DEFAULT_CREDITS :
3633 conf->cfg_config_u.cfg_net.net_max_tx_credits;
3635 rc = lnet_add_net_common(net, &tun);
3638 mutex_unlock(&the_lnet.ln_api_mutex);
3639 while (!list_empty(&net_head)) {
3640 /* net_head list is empty in success case */
3641 net = list_entry(net_head.next, struct lnet_net, net_list);
3642 list_del_init(&net->net_list);
3649 lnet_dyn_del_net(__u32 net_id)
3651 struct lnet_net *net;
3652 struct lnet_ping_buffer *pbuf;
3653 struct lnet_handle_md ping_mdh;
3657 /* don't allow userspace to shutdown the LOLND */
3658 if (LNET_NETTYP(net_id) == LOLND)
3661 mutex_lock(&the_lnet.ln_api_mutex);
3665 net = lnet_get_net_locked(net_id);
3672 net_ni_count = lnet_get_net_ni_count_locked(net);
3676 /* create and link a new ping info, before removing the old one */
3677 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3678 lnet_get_ni_count() - net_ni_count, false);
3682 lnet_shutdown_lndnet(net);
3684 lnet_acceptor_stop();
3686 lnet_ping_target_update(pbuf, ping_mdh);
3689 mutex_unlock(&the_lnet.ln_api_mutex);
3694 void lnet_incr_dlc_seq(void)
3696 atomic_inc(&lnet_dlc_seq_no);
3699 __u32 lnet_get_dlc_seq_locked(void)
3701 return atomic_read(&lnet_dlc_seq_no);
3705 lnet_ni_set_healthv(lnet_nid_t nid, int value, bool all)
3707 struct lnet_net *net;
3710 lnet_net_lock(LNET_LOCK_EX);
3711 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3712 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3713 if (ni->ni_nid == nid || all) {
3714 atomic_set(&ni->ni_healthv, value);
3715 if (list_empty(&ni->ni_recovery) &&
3716 value < LNET_MAX_HEALTH_VALUE) {
3717 CERROR("manually adding local NI %s to recovery\n",
3718 libcfs_nid2str(ni->ni_nid));
3719 list_add_tail(&ni->ni_recovery,
3720 &the_lnet.ln_mt_localNIRecovq);
3721 lnet_ni_addref_locked(ni, 0);
3724 lnet_net_unlock(LNET_LOCK_EX);
3730 lnet_net_unlock(LNET_LOCK_EX);
3734 lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
3738 lnet_nid_t nid = stats->hlni_nid;
3740 cpt = lnet_net_lock_current();
3741 ni = lnet_nid2ni_locked(nid, cpt);
3748 stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
3749 stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
3750 stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
3751 stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
3752 stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
3753 stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
3754 stats->hlni_fatal_error = atomic_read(&ni->ni_fatal_error_on);
3755 stats->hlni_health_value = atomic_read(&ni->ni_healthv);
3756 stats->hlni_ping_count = ni->ni_ping_count;
3757 stats->hlni_next_ping = ni->ni_next_ping;
3760 lnet_net_unlock(cpt);
3766 lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3771 lnet_net_lock(LNET_LOCK_EX);
3772 list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
3773 list->rlst_nid_array[i] = ni->ni_nid;
3775 if (i >= LNET_MAX_SHOW_NUM_NID)
3778 lnet_net_unlock(LNET_LOCK_EX);
3779 list->rlst_num_nids = i;
3785 lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3787 struct lnet_peer_ni *lpni;
3790 lnet_net_lock(LNET_LOCK_EX);
3791 list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
3792 list->rlst_nid_array[i] = lpni->lpni_nid;
3794 if (i >= LNET_MAX_SHOW_NUM_NID)
3797 lnet_net_unlock(LNET_LOCK_EX);
3798 list->rlst_num_nids = i;
3804 * LNet ioctl handler.
3808 LNetCtl(unsigned int cmd, void *arg)
3810 struct libcfs_ioctl_data *data = arg;
3811 struct lnet_ioctl_config_data *config;
3812 struct lnet_process_id id = {0};
3816 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
3817 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
3820 case IOC_LIBCFS_GET_NI:
3821 rc = LNetGetId(data->ioc_count, &id);
3822 data->ioc_nid = id.nid;
3825 case IOC_LIBCFS_FAIL_NID:
3826 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
3828 case IOC_LIBCFS_ADD_ROUTE: {
3829 /* default router sensitivity to 1 */
3830 unsigned int sensitivity = 1;
3833 if (config->cfg_hdr.ioc_len < sizeof(*config))
3836 if (config->cfg_config_u.cfg_route.rtr_sensitivity) {
3838 config->cfg_config_u.cfg_route.rtr_sensitivity;
3841 mutex_lock(&the_lnet.ln_api_mutex);
3842 rc = lnet_add_route(config->cfg_net,
3843 config->cfg_config_u.cfg_route.rtr_hop,
3845 config->cfg_config_u.cfg_route.
3846 rtr_priority, sensitivity);
3847 mutex_unlock(&the_lnet.ln_api_mutex);
3851 case IOC_LIBCFS_DEL_ROUTE:
3854 if (config->cfg_hdr.ioc_len < sizeof(*config))
3857 mutex_lock(&the_lnet.ln_api_mutex);
3858 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
3859 mutex_unlock(&the_lnet.ln_api_mutex);
3862 case IOC_LIBCFS_GET_ROUTE:
3865 if (config->cfg_hdr.ioc_len < sizeof(*config))
3868 mutex_lock(&the_lnet.ln_api_mutex);
3869 rc = lnet_get_route(config->cfg_count,
3871 &config->cfg_config_u.cfg_route.rtr_hop,
3873 &config->cfg_config_u.cfg_route.rtr_flags,
3874 &config->cfg_config_u.cfg_route.
3876 &config->cfg_config_u.cfg_route.
3878 mutex_unlock(&the_lnet.ln_api_mutex);
3881 case IOC_LIBCFS_GET_LOCAL_NI: {
3882 struct lnet_ioctl_config_ni *cfg_ni;
3883 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3884 struct lnet_ioctl_element_stats *stats;
3889 /* get the tunables if they are available */
3890 if (cfg_ni->lic_cfg_hdr.ioc_len <
3891 sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
3894 stats = (struct lnet_ioctl_element_stats *)
3896 tun = (struct lnet_ioctl_config_lnd_tunables *)
3897 (cfg_ni->lic_bulk + sizeof(*stats));
3899 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
3902 mutex_lock(&the_lnet.ln_api_mutex);
3903 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
3904 mutex_unlock(&the_lnet.ln_api_mutex);
3908 case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
3909 struct lnet_ioctl_element_msg_stats *msg_stats = arg;
3911 if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
3914 mutex_lock(&the_lnet.ln_api_mutex);
3915 rc = lnet_get_ni_stats(msg_stats);
3916 mutex_unlock(&the_lnet.ln_api_mutex);
3921 case IOC_LIBCFS_GET_NET: {
3922 size_t total = sizeof(*config) +
3923 sizeof(struct lnet_ioctl_net_config);
3926 if (config->cfg_hdr.ioc_len < total)
3929 mutex_lock(&the_lnet.ln_api_mutex);
3930 rc = lnet_get_net_config(config);
3931 mutex_unlock(&the_lnet.ln_api_mutex);
3935 case IOC_LIBCFS_GET_LNET_STATS:
3937 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
3939 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
3942 mutex_lock(&the_lnet.ln_api_mutex);
3943 rc = lnet_counters_get(&lnet_stats->st_cntrs);
3944 mutex_unlock(&the_lnet.ln_api_mutex);
3948 case IOC_LIBCFS_RESET_LNET_STATS:
3950 mutex_lock(&the_lnet.ln_api_mutex);
3951 lnet_counters_reset();
3952 mutex_unlock(&the_lnet.ln_api_mutex);
3956 case IOC_LIBCFS_CONFIG_RTR:
3959 if (config->cfg_hdr.ioc_len < sizeof(*config))
3962 mutex_lock(&the_lnet.ln_api_mutex);
3963 if (config->cfg_config_u.cfg_buffers.buf_enable) {
3964 rc = lnet_rtrpools_enable();
3965 mutex_unlock(&the_lnet.ln_api_mutex);
3968 lnet_rtrpools_disable();
3969 mutex_unlock(&the_lnet.ln_api_mutex);
3972 case IOC_LIBCFS_ADD_BUF:
3975 if (config->cfg_hdr.ioc_len < sizeof(*config))
3978 mutex_lock(&the_lnet.ln_api_mutex);
3979 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
3981 config->cfg_config_u.cfg_buffers.
3983 config->cfg_config_u.cfg_buffers.
3985 mutex_unlock(&the_lnet.ln_api_mutex);
3988 case IOC_LIBCFS_SET_NUMA_RANGE: {
3989 struct lnet_ioctl_set_value *numa;
3991 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3993 lnet_net_lock(LNET_LOCK_EX);
3994 lnet_numa_range = numa->sv_value;
3995 lnet_net_unlock(LNET_LOCK_EX);
3999 case IOC_LIBCFS_GET_NUMA_RANGE: {
4000 struct lnet_ioctl_set_value *numa;
4002 if (numa->sv_hdr.ioc_len != sizeof(*numa))
4004 numa->sv_value = lnet_numa_range;
4008 case IOC_LIBCFS_GET_BUF: {
4009 struct lnet_ioctl_pool_cfg *pool_cfg;
4010 size_t total = sizeof(*config) + sizeof(*pool_cfg);
4014 if (config->cfg_hdr.ioc_len < total)
4017 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
4019 mutex_lock(&the_lnet.ln_api_mutex);
4020 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
4021 mutex_unlock(&the_lnet.ln_api_mutex);
4025 case IOC_LIBCFS_GET_LOCAL_HSTATS: {
4026 struct lnet_ioctl_local_ni_hstats *stats = arg;
4028 if (stats->hlni_hdr.ioc_len < sizeof(*stats))
4031 mutex_lock(&the_lnet.ln_api_mutex);
4032 rc = lnet_get_local_ni_hstats(stats);
4033 mutex_unlock(&the_lnet.ln_api_mutex);
4038 case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
4039 struct lnet_ioctl_recovery_list *list = arg;
4040 if (list->rlst_hdr.ioc_len < sizeof(*list))
4043 mutex_lock(&the_lnet.ln_api_mutex);
4044 if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
4045 rc = lnet_get_local_ni_recovery_list(list);
4047 rc = lnet_get_peer_ni_recovery_list(list);
4048 mutex_unlock(&the_lnet.ln_api_mutex);
4052 case IOC_LIBCFS_ADD_PEER_NI: {
4053 struct lnet_ioctl_peer_cfg *cfg = arg;
4055 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4058 mutex_lock(&the_lnet.ln_api_mutex);
4059 rc = lnet_add_peer_ni(cfg->prcfg_prim_nid,
4062 mutex_unlock(&the_lnet.ln_api_mutex);
4066 case IOC_LIBCFS_DEL_PEER_NI: {
4067 struct lnet_ioctl_peer_cfg *cfg = arg;
4069 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4072 mutex_lock(&the_lnet.ln_api_mutex);
4073 rc = lnet_del_peer_ni(cfg->prcfg_prim_nid,
4074 cfg->prcfg_cfg_nid);
4075 mutex_unlock(&the_lnet.ln_api_mutex);
4079 case IOC_LIBCFS_GET_PEER_INFO: {
4080 struct lnet_ioctl_peer *peer_info = arg;
4082 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
4085 mutex_lock(&the_lnet.ln_api_mutex);
4086 rc = lnet_get_peer_ni_info(
4087 peer_info->pr_count,
4089 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
4090 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
4091 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
4092 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
4093 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
4094 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
4095 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
4096 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
4097 mutex_unlock(&the_lnet.ln_api_mutex);
4101 case IOC_LIBCFS_GET_PEER_NI: {
4102 struct lnet_ioctl_peer_cfg *cfg = arg;
4104 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4107 mutex_lock(&the_lnet.ln_api_mutex);
4108 rc = lnet_get_peer_info(cfg,
4109 (void __user *)cfg->prcfg_bulk);
4110 mutex_unlock(&the_lnet.ln_api_mutex);
4114 case IOC_LIBCFS_GET_PEER_LIST: {
4115 struct lnet_ioctl_peer_cfg *cfg = arg;
4117 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4120 mutex_lock(&the_lnet.ln_api_mutex);
4121 rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
4122 (struct lnet_process_id __user *)cfg->prcfg_bulk);
4123 mutex_unlock(&the_lnet.ln_api_mutex);
4127 case IOC_LIBCFS_SET_HEALHV: {
4128 struct lnet_ioctl_reset_health_cfg *cfg = arg;
4130 if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
4132 if (cfg->rh_value < 0 ||
4133 cfg->rh_value > LNET_MAX_HEALTH_VALUE)
4134 value = LNET_MAX_HEALTH_VALUE;
4136 value = cfg->rh_value;
4137 CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
4138 value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
4139 "local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
4140 mutex_lock(&the_lnet.ln_api_mutex);
4141 if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI)
4142 lnet_ni_set_healthv(cfg->rh_nid, value,
4145 lnet_peer_ni_set_healthv(cfg->rh_nid, value,
4147 mutex_unlock(&the_lnet.ln_api_mutex);
4151 case IOC_LIBCFS_NOTIFY_ROUTER: {
4152 time64_t deadline = ktime_get_real_seconds() - data->ioc_u64[0];
4154 /* The deadline passed in by the user should be some time in
4155 * seconds in the future since the UNIX epoch. We have to map
4156 * that deadline to the wall clock.
4158 deadline += ktime_get_seconds();
4159 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, false,
4163 case IOC_LIBCFS_LNET_DIST:
4164 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
4165 if (rc < 0 && rc != -EHOSTUNREACH)
4168 data->ioc_u32[0] = rc;
4171 case IOC_LIBCFS_TESTPROTOCOMPAT:
4172 the_lnet.ln_testprotocompat = data->ioc_flags;
4175 case IOC_LIBCFS_LNET_FAULT:
4176 return lnet_fault_ctl(data->ioc_flags, data);
4178 case IOC_LIBCFS_PING: {
4179 signed long timeout;
4181 id.nid = data->ioc_nid;
4182 id.pid = data->ioc_u32[0];
4184 /* If timeout is negative then set default of 3 minutes */
4185 if (((s32)data->ioc_u32[1] <= 0) ||
4186 data->ioc_u32[1] > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
4187 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
4189 timeout = nsecs_to_jiffies(data->ioc_u32[1] * NSEC_PER_MSEC);
4191 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
4192 data->ioc_plen1 / sizeof(struct lnet_process_id));
4197 data->ioc_count = rc;
4201 case IOC_LIBCFS_PING_PEER: {
4202 struct lnet_ioctl_ping_data *ping = arg;
4203 struct lnet_peer *lp;
4204 signed long timeout;
4206 /* If timeout is negative then set default of 3 minutes */
4207 if (((s32)ping->op_param) <= 0 ||
4208 ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
4209 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
4211 timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
4213 rc = lnet_ping(ping->ping_id, timeout,
4219 mutex_lock(&the_lnet.ln_api_mutex);
4220 lp = lnet_find_peer(ping->ping_id.nid);
4222 ping->ping_id.nid = lp->lp_primary_nid;
4223 ping->mr_info = lnet_peer_is_multi_rail(lp);
4224 lnet_peer_decref_locked(lp);
4226 mutex_unlock(&the_lnet.ln_api_mutex);
4228 ping->ping_count = rc;
4232 case IOC_LIBCFS_DISCOVER: {
4233 struct lnet_ioctl_ping_data *discover = arg;
4234 struct lnet_peer *lp;
4236 rc = lnet_discover(discover->ping_id, discover->op_param,
4238 discover->ping_count);
4242 mutex_lock(&the_lnet.ln_api_mutex);
4243 lp = lnet_find_peer(discover->ping_id.nid);
4245 discover->ping_id.nid = lp->lp_primary_nid;
4246 discover->mr_info = lnet_peer_is_multi_rail(lp);
4247 lnet_peer_decref_locked(lp);
4249 mutex_unlock(&the_lnet.ln_api_mutex);
4251 discover->ping_count = rc;
4255 case IOC_LIBCFS_ADD_UDSP: {
4256 struct lnet_ioctl_udsp *ioc_udsp = arg;
4257 __u32 bulk_size = ioc_udsp->iou_hdr.ioc_len;
4259 mutex_lock(&the_lnet.ln_api_mutex);
4260 rc = lnet_udsp_demarshal_add(arg, bulk_size);
4262 rc = lnet_udsp_apply_policies(NULL, false);
4263 CDEBUG(D_NET, "policy application returned %d\n", rc);
4266 mutex_unlock(&the_lnet.ln_api_mutex);
4271 case IOC_LIBCFS_DEL_UDSP: {
4272 struct lnet_ioctl_udsp *ioc_udsp = arg;
4273 int idx = ioc_udsp->iou_idx;
4275 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4278 mutex_lock(&the_lnet.ln_api_mutex);
4279 rc = lnet_udsp_del_policy(idx);
4281 rc = lnet_udsp_apply_policies(NULL, false);
4282 CDEBUG(D_NET, "policy re-application returned %d\n",
4286 mutex_unlock(&the_lnet.ln_api_mutex);
4291 case IOC_LIBCFS_GET_UDSP_SIZE: {
4292 struct lnet_ioctl_udsp *ioc_udsp = arg;
4293 struct lnet_udsp *udsp;
4295 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4300 mutex_lock(&the_lnet.ln_api_mutex);
4301 udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
4305 /* coming in iou_idx will hold the idx of the udsp
4306 * to get the size of. going out the iou_idx will
4307 * hold the size of the UDSP found at the passed
4310 ioc_udsp->iou_idx = lnet_get_udsp_size(udsp);
4311 if (ioc_udsp->iou_idx < 0)
4314 mutex_unlock(&the_lnet.ln_api_mutex);
4319 case IOC_LIBCFS_GET_UDSP: {
4320 struct lnet_ioctl_udsp *ioc_udsp = arg;
4321 struct lnet_udsp *udsp;
4323 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4328 mutex_lock(&the_lnet.ln_api_mutex);
4329 udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
4333 rc = lnet_udsp_marshal(udsp, ioc_udsp);
4334 mutex_unlock(&the_lnet.ln_api_mutex);
4339 case IOC_LIBCFS_GET_CONST_UDSP_INFO: {
4340 struct lnet_ioctl_construct_udsp_info *info = arg;
4342 if (info->cud_hdr.ioc_len < sizeof(*info))
4345 CDEBUG(D_NET, "GET_UDSP_INFO for %s\n",
4346 libcfs_nid2str(info->cud_nid));
4348 mutex_lock(&the_lnet.ln_api_mutex);
4349 lnet_udsp_get_construct_info(info);
4350 mutex_unlock(&the_lnet.ln_api_mutex);
4356 ni = lnet_net2ni_addref(data->ioc_net);
4360 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
4363 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
4370 EXPORT_SYMBOL(LNetCtl);
4372 void LNetDebugPeer(struct lnet_process_id id)
4374 lnet_debug_peer(id.nid);
4376 EXPORT_SYMBOL(LNetDebugPeer);
4379 * Determine if the specified peer \a nid is on the local node.
4381 * \param nid peer nid to check
4383 * \retval true If peer NID is on the local node.
4384 * \retval false If peer NID is not on the local node.
4386 bool LNetIsPeerLocal(lnet_nid_t nid)
4388 struct lnet_net *net;
4392 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) {
4395 if (ni->ni_nid == nid) {
4396 lnet_net_unlock(cpt);
4401 lnet_net_unlock(cpt);
4405 EXPORT_SYMBOL(LNetIsPeerLocal);
4408 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
4409 * Note that all interfaces share a same PID, as requested by LNetNIInit().
4411 * \param index Index of the interface to look up.
4412 * \param id On successful return, this location will hold the
4413 * struct lnet_process_id ID of the interface.
4415 * \retval 0 If an interface exists at \a index.
4416 * \retval -ENOENT If no interface has been found.
4419 LNetGetId(unsigned int index, struct lnet_process_id *id)
4422 struct lnet_net *net;
4426 LASSERT(the_lnet.ln_refcount > 0);
4428 cpt = lnet_net_lock_current();
4430 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4431 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4435 id->nid = ni->ni_nid;
4436 id->pid = the_lnet.ln_pid;
4442 lnet_net_unlock(cpt);
4445 EXPORT_SYMBOL(LNetGetId);
4450 struct lnet_handle_md mdh;
4451 struct completion completion;
4455 lnet_ping_event_handler(struct lnet_event *event)
4457 struct ping_data *pd = event->md_user_ptr;
4459 CDEBUG(D_NET, "ping event (%d %d)%s\n",
4460 event->type, event->status,
4461 event->unlinked ? " unlinked" : "");
4463 if (event->status) {
4465 pd->rc = event->status;
4466 } else if (event->type == LNET_EVENT_REPLY) {
4468 pd->rc = event->mlength;
4470 if (event->unlinked)
4471 complete(&pd->completion);
4474 static int lnet_ping(struct lnet_process_id id, signed long timeout,
4475 struct lnet_process_id __user *ids, int n_ids)
4477 struct lnet_md md = { NULL };
4478 struct ping_data pd = { 0 };
4479 struct lnet_ping_buffer *pbuf;
4480 struct lnet_process_id tmpid;
4486 /* n_ids limit is arbitrary */
4487 if (n_ids <= 0 || id.nid == LNET_NID_ANY)
4491 * if the user buffer has more space than the lnet_interfaces_max
4492 * then only fill it up to lnet_interfaces_max
4494 if (n_ids > lnet_interfaces_max)
4495 n_ids = lnet_interfaces_max;
4497 if (id.pid == LNET_PID_ANY)
4498 id.pid = LNET_PID_LUSTRE;
4500 pbuf = lnet_ping_buffer_alloc(n_ids, GFP_NOFS);
4504 /* initialize md content */
4505 md.start = &pbuf->pb_info;
4506 md.length = LNET_PING_INFO_SIZE(n_ids);
4507 md.threshold = 2; /* GET/REPLY */
4509 md.options = LNET_MD_TRUNCATE;
4511 md.handler = lnet_ping_event_handler;
4513 init_completion(&pd.completion);
4515 rc = LNetMDBind(&md, LNET_UNLINK, &pd.mdh);
4517 CERROR("Can't bind MD: %d\n", rc);
4518 goto fail_ping_buffer_decref;
4521 rc = LNetGet(LNET_NID_ANY, pd.mdh, id,
4522 LNET_RESERVED_PORTAL,
4523 LNET_PROTO_PING_MATCHBITS, 0, false);
4526 /* Don't CERROR; this could be deliberate! */
4527 rc2 = LNetMDUnlink(pd.mdh);
4530 /* NB must wait for the UNLINK event below... */
4533 if (wait_for_completion_timeout(&pd.completion, timeout) == 0) {
4534 /* Ensure completion in finite time... */
4535 LNetMDUnlink(pd.mdh);
4536 wait_for_completion(&pd.completion);
4540 goto fail_ping_buffer_decref;
4544 LASSERT(nob >= 0 && nob <= LNET_PING_INFO_SIZE(n_ids));
4546 rc = -EPROTO; /* if I can't parse... */
4549 CERROR("%s: ping info too short %d\n",
4550 libcfs_id2str(id), nob);
4551 goto fail_ping_buffer_decref;
4554 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
4555 lnet_swap_pinginfo(pbuf);
4556 } else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
4557 CERROR("%s: Unexpected magic %08x\n",
4558 libcfs_id2str(id), pbuf->pb_info.pi_magic);
4559 goto fail_ping_buffer_decref;
4562 if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
4563 CERROR("%s: ping w/o NI status: 0x%x\n",
4564 libcfs_id2str(id), pbuf->pb_info.pi_features);
4565 goto fail_ping_buffer_decref;
4568 if (nob < LNET_PING_INFO_SIZE(0)) {
4569 CERROR("%s: Short reply %d(%d min)\n",
4571 nob, (int)LNET_PING_INFO_SIZE(0));
4572 goto fail_ping_buffer_decref;
4575 if (pbuf->pb_info.pi_nnis < n_ids)
4576 n_ids = pbuf->pb_info.pi_nnis;
4578 if (nob < LNET_PING_INFO_SIZE(n_ids)) {
4579 CERROR("%s: Short reply %d(%d expected)\n",
4581 nob, (int)LNET_PING_INFO_SIZE(n_ids));
4582 goto fail_ping_buffer_decref;
4585 rc = -EFAULT; /* if I segv in copy_to_user()... */
4587 memset(&tmpid, 0, sizeof(tmpid));
4588 for (i = 0; i < n_ids; i++) {
4589 tmpid.pid = pbuf->pb_info.pi_pid;
4590 tmpid.nid = pbuf->pb_info.pi_ni[i].ns_nid;
4591 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
4592 goto fail_ping_buffer_decref;
4594 rc = pbuf->pb_info.pi_nnis;
4596 fail_ping_buffer_decref:
4597 lnet_ping_buffer_decref(pbuf);
4602 lnet_discover(struct lnet_process_id id, __u32 force,
4603 struct lnet_process_id __user *ids, int n_ids)
4605 struct lnet_peer_ni *lpni;
4606 struct lnet_peer_ni *p;
4607 struct lnet_peer *lp;
4608 struct lnet_process_id *buf;
4614 id.nid == LNET_NID_ANY)
4617 if (id.pid == LNET_PID_ANY)
4618 id.pid = LNET_PID_LUSTRE;
4621 * If the user buffer has more space than the lnet_interfaces_max,
4622 * then only fill it up to lnet_interfaces_max.
4624 if (n_ids > lnet_interfaces_max)
4625 n_ids = lnet_interfaces_max;
4627 CFS_ALLOC_PTR_ARRAY(buf, n_ids);
4631 cpt = lnet_net_lock_current();
4632 lpni = lnet_nid2peerni_locked(id.nid, LNET_NID_ANY, cpt);
4639 * Clearing the NIDS_UPTODATE flag ensures the peer will
4640 * be discovered, provided discovery has not been disabled.
4642 lp = lpni->lpni_peer_net->lpn_peer;
4643 spin_lock(&lp->lp_lock);
4644 lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
4645 /* If the force flag is set, force a PING and PUSH as well. */
4647 lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
4648 spin_unlock(&lp->lp_lock);
4649 rc = lnet_discover_peer_locked(lpni, cpt, true);
4653 /* The lpni (or lp) for this NID may have changed and our ref is
4654 * the only thing keeping the old one around. Release the ref
4655 * and lookup the lpni again
4657 lnet_peer_ni_decref_locked(lpni);
4658 lpni = lnet_find_peer_ni_locked(id.nid);
4663 lp = lpni->lpni_peer_net->lpn_peer;
4667 while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
4668 buf[i].pid = id.pid;
4669 buf[i].nid = p->lpni_nid;
4676 lnet_peer_ni_decref_locked(lpni);
4678 lnet_net_unlock(cpt);
4681 if (copy_to_user(ids, buf, rc * sizeof(*buf)))
4683 CFS_FREE_PTR_ARRAY(buf, n_ids);
4689 * Retrieve peer discovery status.
4691 * \retval 1 if lnet_peer_discovery_disabled is 0
4692 * \retval 0 if lnet_peer_discovery_disabled is 1
4695 LNetGetPeerDiscoveryStatus(void)
4697 return !lnet_peer_discovery_disabled;
4699 EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);