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>
42 #include <lnet/udsp.h>
43 #include <lnet/lib-lnet.h>
45 #define D_LNI D_CONSOLE
48 * initialize ln_api_mutex statically, since it needs to be used in
49 * discovery_set callback. That module parameter callback can be called
50 * before module init completes. The mutex needs to be ready for use then.
52 struct lnet the_lnet = {
53 .ln_api_mutex = __MUTEX_INITIALIZER(the_lnet.ln_api_mutex),
54 }; /* THE state of the network */
55 EXPORT_SYMBOL(the_lnet);
57 static char *ip2nets = "";
58 module_param(ip2nets, charp, 0444);
59 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
61 static char *networks = "";
62 module_param(networks, charp, 0444);
63 MODULE_PARM_DESC(networks, "local networks");
65 static char *routes = "";
66 module_param(routes, charp, 0444);
67 MODULE_PARM_DESC(routes, "routes to non-local networks");
69 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
70 module_param(rnet_htable_size, int, 0444);
71 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
73 static int use_tcp_bonding;
74 module_param(use_tcp_bonding, int, 0444);
75 MODULE_PARM_DESC(use_tcp_bonding,
76 "use_tcp_bonding parameter has been removed");
78 unsigned int lnet_numa_range = 0;
79 module_param(lnet_numa_range, uint, 0444);
80 MODULE_PARM_DESC(lnet_numa_range,
81 "NUMA range to consider during Multi-Rail selection");
84 * lnet_health_sensitivity determines by how much we decrement the health
85 * value on sending error. The value defaults to 100, which means health
86 * interface health is decremented by 100 points every failure.
88 unsigned int lnet_health_sensitivity = 100;
89 static int sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp);
90 #ifdef HAVE_KERNEL_PARAM_OPS
91 static struct kernel_param_ops param_ops_health_sensitivity = {
92 .set = sensitivity_set,
95 #define param_check_health_sensitivity(name, p) \
96 __param_check(name, p, int)
97 module_param(lnet_health_sensitivity, health_sensitivity, S_IRUGO|S_IWUSR);
99 module_param_call(lnet_health_sensitivity, sensitivity_set, param_get_int,
100 &lnet_health_sensitivity, S_IRUGO|S_IWUSR);
102 MODULE_PARM_DESC(lnet_health_sensitivity,
103 "Value to decrement the health value by on error");
106 * lnet_recovery_interval determines how often we should perform recovery
107 * on unhealthy interfaces.
109 unsigned int lnet_recovery_interval = 1;
110 static int recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp);
111 #ifdef HAVE_KERNEL_PARAM_OPS
112 static struct kernel_param_ops param_ops_recovery_interval = {
113 .set = recovery_interval_set,
114 .get = param_get_int,
116 #define param_check_recovery_interval(name, p) \
117 __param_check(name, p, int)
118 module_param(lnet_recovery_interval, recovery_interval, S_IRUGO|S_IWUSR);
120 module_param_call(lnet_recovery_interval, recovery_interval_set, param_get_int,
121 &lnet_recovery_interval, S_IRUGO|S_IWUSR);
123 MODULE_PARM_DESC(lnet_recovery_interval,
124 "DEPRECATED - Interval to recover unhealthy interfaces in seconds");
126 unsigned int lnet_recovery_limit;
127 module_param(lnet_recovery_limit, uint, 0644);
128 MODULE_PARM_DESC(lnet_recovery_limit,
129 "How long to attempt recovery of unhealthy peer interfaces in seconds. Set to 0 to allow indefinite recovery");
131 static int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
132 static int intf_max_set(const char *val, cfs_kernel_param_arg_t *kp);
134 static struct kernel_param_ops param_ops_interfaces_max = {
136 .get = param_get_int,
139 #define param_check_interfaces_max(name, p) \
140 __param_check(name, p, int)
142 #ifdef HAVE_KERNEL_PARAM_OPS
143 module_param(lnet_interfaces_max, interfaces_max, 0644);
145 module_param_call(lnet_interfaces_max, intf_max_set, param_get_int,
146 ¶m_ops_interfaces_max, 0644);
148 MODULE_PARM_DESC(lnet_interfaces_max,
149 "Maximum number of interfaces in a node.");
151 unsigned lnet_peer_discovery_disabled = 0;
152 static int discovery_set(const char *val, cfs_kernel_param_arg_t *kp);
154 static struct kernel_param_ops param_ops_discovery_disabled = {
155 .set = discovery_set,
156 .get = param_get_int,
159 #define param_check_discovery_disabled(name, p) \
160 __param_check(name, p, int)
161 #ifdef HAVE_KERNEL_PARAM_OPS
162 module_param(lnet_peer_discovery_disabled, discovery_disabled, 0644);
164 module_param_call(lnet_peer_discovery_disabled, discovery_set, param_get_int,
165 ¶m_ops_discovery_disabled, 0644);
167 MODULE_PARM_DESC(lnet_peer_discovery_disabled,
168 "Set to 1 to disable peer discovery on this node.");
170 unsigned int lnet_drop_asym_route;
171 static int drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp);
173 static struct kernel_param_ops param_ops_drop_asym_route = {
174 .set = drop_asym_route_set,
175 .get = param_get_int,
178 #define param_check_drop_asym_route(name, p) \
179 __param_check(name, p, int)
180 #ifdef HAVE_KERNEL_PARAM_OPS
181 module_param(lnet_drop_asym_route, drop_asym_route, 0644);
183 module_param_call(lnet_drop_asym_route, drop_asym_route_set, param_get_int,
184 ¶m_ops_drop_asym_route, 0644);
186 MODULE_PARM_DESC(lnet_drop_asym_route,
187 "Set to 1 to drop asymmetrical route messages.");
189 #define LNET_TRANSACTION_TIMEOUT_DEFAULT 50
190 unsigned int lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_DEFAULT;
191 static int transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp);
192 #ifdef HAVE_KERNEL_PARAM_OPS
193 static struct kernel_param_ops param_ops_transaction_timeout = {
194 .set = transaction_to_set,
195 .get = param_get_int,
198 #define param_check_transaction_timeout(name, p) \
199 __param_check(name, p, int)
200 module_param(lnet_transaction_timeout, transaction_timeout, S_IRUGO|S_IWUSR);
202 module_param_call(lnet_transaction_timeout, transaction_to_set, param_get_int,
203 &lnet_transaction_timeout, S_IRUGO|S_IWUSR);
205 MODULE_PARM_DESC(lnet_transaction_timeout,
206 "Maximum number of seconds to wait for a peer response.");
208 #define LNET_RETRY_COUNT_DEFAULT 2
209 unsigned int lnet_retry_count = LNET_RETRY_COUNT_DEFAULT;
210 static int retry_count_set(const char *val, cfs_kernel_param_arg_t *kp);
211 #ifdef HAVE_KERNEL_PARAM_OPS
212 static struct kernel_param_ops param_ops_retry_count = {
213 .set = retry_count_set,
214 .get = param_get_int,
217 #define param_check_retry_count(name, p) \
218 __param_check(name, p, int)
219 module_param(lnet_retry_count, retry_count, S_IRUGO|S_IWUSR);
221 module_param_call(lnet_retry_count, retry_count_set, param_get_int,
222 &lnet_retry_count, S_IRUGO|S_IWUSR);
224 MODULE_PARM_DESC(lnet_retry_count,
225 "Maximum number of times to retry transmitting a message");
227 unsigned int lnet_response_tracking = 3;
228 static int response_tracking_set(const char *val, cfs_kernel_param_arg_t *kp);
230 #ifdef HAVE_KERNEL_PARAM_OPS
231 static struct kernel_param_ops param_ops_response_tracking = {
232 .set = response_tracking_set,
233 .get = param_get_int,
236 #define param_check_response_tracking(name, p) \
237 __param_check(name, p, int)
238 module_param(lnet_response_tracking, response_tracking, 0644);
240 module_param_call(lnet_response_tracking, response_tracking_set, param_get_int,
241 &lnet_response_tracking, 0644);
243 MODULE_PARM_DESC(lnet_response_tracking,
244 "(0|1|2|3) LNet Internal Only|GET Reply only|PUT ACK only|Full Tracking (default)");
246 #define LNET_LND_TIMEOUT_DEFAULT ((LNET_TRANSACTION_TIMEOUT_DEFAULT - 1) / \
247 (LNET_RETRY_COUNT_DEFAULT + 1))
248 unsigned int lnet_lnd_timeout = LNET_LND_TIMEOUT_DEFAULT;
249 static void lnet_set_lnd_timeout(void)
251 lnet_lnd_timeout = (lnet_transaction_timeout - 1) /
252 (lnet_retry_count + 1);
256 * This sequence number keeps track of how many times DLC was used to
257 * update the local NIs. It is incremented when a NI is added or
258 * removed and checked when sending a message to determine if there is
259 * a need to re-run the selection algorithm. See lnet_select_pathway()
260 * for more details on its usage.
262 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
264 static int lnet_ping(struct lnet_process_id id, signed long timeout,
265 struct lnet_process_id __user *ids, int n_ids);
267 static int lnet_discover(struct lnet_process_id id, __u32 force,
268 struct lnet_process_id __user *ids, int n_ids);
271 sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp)
274 unsigned *sensitivity = (unsigned *)kp->arg;
277 rc = kstrtoul(val, 0, &value);
279 CERROR("Invalid module parameter value for 'lnet_health_sensitivity'\n");
284 * The purpose of locking the api_mutex here is to ensure that
285 * the correct value ends up stored properly.
287 mutex_lock(&the_lnet.ln_api_mutex);
289 if (value > LNET_MAX_HEALTH_VALUE) {
290 mutex_unlock(&the_lnet.ln_api_mutex);
291 CERROR("Invalid health value. Maximum: %d value = %lu\n",
292 LNET_MAX_HEALTH_VALUE, value);
296 if (*sensitivity != 0 && value == 0 && lnet_retry_count != 0) {
297 lnet_retry_count = 0;
298 lnet_set_lnd_timeout();
301 *sensitivity = value;
303 mutex_unlock(&the_lnet.ln_api_mutex);
309 recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp)
311 CWARN("'lnet_recovery_interval' has been deprecated\n");
317 discovery_set(const char *val, cfs_kernel_param_arg_t *kp)
320 unsigned *discovery_off = (unsigned *)kp->arg;
322 struct lnet_ping_buffer *pbuf;
324 rc = kstrtoul(val, 0, &value);
326 CERROR("Invalid module parameter value for 'lnet_peer_discovery_disabled'\n");
330 value = (value) ? 1 : 0;
333 * The purpose of locking the api_mutex here is to ensure that
334 * the correct value ends up stored properly.
336 mutex_lock(&the_lnet.ln_api_mutex);
338 if (value == *discovery_off) {
339 mutex_unlock(&the_lnet.ln_api_mutex);
344 * We still want to set the discovery value even when LNet is not
345 * running. This is the case when LNet is being loaded and we want
346 * the module parameters to take effect. Otherwise if we're
347 * changing the value dynamically, we want to set it after
350 if (the_lnet.ln_state != LNET_STATE_RUNNING) {
351 *discovery_off = value;
352 mutex_unlock(&the_lnet.ln_api_mutex);
356 /* tell peers that discovery setting has changed */
357 lnet_net_lock(LNET_LOCK_EX);
358 pbuf = the_lnet.ln_ping_target;
360 pbuf->pb_info.pi_features &= ~LNET_PING_FEAT_DISCOVERY;
362 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
363 lnet_net_unlock(LNET_LOCK_EX);
365 /* only send a push when we're turning off discovery */
366 if (*discovery_off <= 0 && value > 0)
367 lnet_push_update_to_peers(1);
368 *discovery_off = value;
370 mutex_unlock(&the_lnet.ln_api_mutex);
376 drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp)
379 unsigned int *drop_asym_route = (unsigned int *)kp->arg;
382 rc = kstrtoul(val, 0, &value);
384 CERROR("Invalid module parameter value for "
385 "'lnet_drop_asym_route'\n");
390 * The purpose of locking the api_mutex here is to ensure that
391 * the correct value ends up stored properly.
393 mutex_lock(&the_lnet.ln_api_mutex);
395 if (value == *drop_asym_route) {
396 mutex_unlock(&the_lnet.ln_api_mutex);
400 *drop_asym_route = value;
402 mutex_unlock(&the_lnet.ln_api_mutex);
408 transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp)
411 unsigned *transaction_to = (unsigned *)kp->arg;
414 rc = kstrtoul(val, 0, &value);
416 CERROR("Invalid module parameter value for 'lnet_transaction_timeout'\n");
421 * The purpose of locking the api_mutex here is to ensure that
422 * the correct value ends up stored properly.
424 mutex_lock(&the_lnet.ln_api_mutex);
426 if (value <= lnet_retry_count || value == 0) {
427 mutex_unlock(&the_lnet.ln_api_mutex);
428 CERROR("Invalid value for lnet_transaction_timeout (%lu). "
429 "Has to be greater than lnet_retry_count (%u)\n",
430 value, lnet_retry_count);
434 if (value == *transaction_to) {
435 mutex_unlock(&the_lnet.ln_api_mutex);
439 *transaction_to = value;
440 /* Update the lnet_lnd_timeout now that we've modified the
441 * transaction timeout
443 lnet_set_lnd_timeout();
445 mutex_unlock(&the_lnet.ln_api_mutex);
451 retry_count_set(const char *val, cfs_kernel_param_arg_t *kp)
454 unsigned *retry_count = (unsigned *)kp->arg;
457 rc = kstrtoul(val, 0, &value);
459 CERROR("Invalid module parameter value for 'lnet_retry_count'\n");
464 * The purpose of locking the api_mutex here is to ensure that
465 * the correct value ends up stored properly.
467 mutex_lock(&the_lnet.ln_api_mutex);
469 if (lnet_health_sensitivity == 0 && value > 0) {
470 mutex_unlock(&the_lnet.ln_api_mutex);
471 CERROR("Can not set lnet_retry_count when health feature is turned off\n");
475 if (value > lnet_transaction_timeout) {
476 mutex_unlock(&the_lnet.ln_api_mutex);
477 CERROR("Invalid value for lnet_retry_count (%lu). "
478 "Has to be smaller than lnet_transaction_timeout (%u)\n",
479 value, lnet_transaction_timeout);
483 *retry_count = value;
485 /* Update the lnet_lnd_timeout now that we've modified the
488 lnet_set_lnd_timeout();
490 mutex_unlock(&the_lnet.ln_api_mutex);
496 intf_max_set(const char *val, cfs_kernel_param_arg_t *kp)
500 rc = kstrtoint(val, 0, &value);
502 CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
506 if (value < LNET_INTERFACES_MIN) {
507 CWARN("max interfaces provided are too small, setting to %d\n",
508 LNET_INTERFACES_MAX_DEFAULT);
509 value = LNET_INTERFACES_MAX_DEFAULT;
512 *(int *)kp->arg = value;
518 response_tracking_set(const char *val, cfs_kernel_param_arg_t *kp)
521 unsigned long new_value;
523 rc = kstrtoul(val, 0, &new_value);
525 CERROR("Invalid value for 'lnet_response_tracking'\n");
529 if (new_value < 0 || new_value > 3) {
530 CWARN("Invalid value (%lu) for 'lnet_response_tracking'\n",
535 lnet_response_tracking = new_value;
541 lnet_get_routes(void)
547 lnet_get_networks(void)
552 if (*networks != 0 && *ip2nets != 0) {
553 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
554 "'ip2nets' but not both at once\n");
559 rc = lnet_parse_ip2nets(&nets, ip2nets);
560 return (rc == 0) ? nets : NULL;
570 lnet_init_locks(void)
572 spin_lock_init(&the_lnet.ln_eq_wait_lock);
573 spin_lock_init(&the_lnet.ln_msg_resend_lock);
574 init_completion(&the_lnet.ln_mt_wait_complete);
575 mutex_init(&the_lnet.ln_lnd_mutex);
578 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
579 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
581 struct kmem_cache *lnet_udsp_cachep; /* udsp cache */
582 struct kmem_cache *lnet_rspt_cachep; /* response tracker cache */
583 struct kmem_cache *lnet_msg_cachep;
586 lnet_slab_setup(void)
588 /* create specific kmem_cache for MEs and small MDs (i.e., originally
589 * allocated in <size-xxx> kmem_cache).
591 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
593 if (!lnet_mes_cachep)
596 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
597 LNET_SMALL_MD_SIZE, 0, 0,
599 if (!lnet_small_mds_cachep)
602 lnet_udsp_cachep = kmem_cache_create("lnet_udsp",
603 sizeof(struct lnet_udsp),
605 if (!lnet_udsp_cachep)
608 lnet_rspt_cachep = kmem_cache_create("lnet_rspt", sizeof(struct lnet_rsp_tracker),
610 if (!lnet_rspt_cachep)
613 lnet_msg_cachep = kmem_cache_create("lnet_msg", sizeof(struct lnet_msg),
615 if (!lnet_msg_cachep)
622 lnet_slab_cleanup(void)
624 if (lnet_msg_cachep) {
625 kmem_cache_destroy(lnet_msg_cachep);
626 lnet_msg_cachep = NULL;
629 if (lnet_rspt_cachep) {
630 kmem_cache_destroy(lnet_rspt_cachep);
631 lnet_rspt_cachep = NULL;
634 if (lnet_udsp_cachep) {
635 kmem_cache_destroy(lnet_udsp_cachep);
636 lnet_udsp_cachep = NULL;
639 if (lnet_small_mds_cachep) {
640 kmem_cache_destroy(lnet_small_mds_cachep);
641 lnet_small_mds_cachep = NULL;
644 if (lnet_mes_cachep) {
645 kmem_cache_destroy(lnet_mes_cachep);
646 lnet_mes_cachep = NULL;
651 lnet_create_remote_nets_table(void)
654 struct list_head *hash;
656 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
657 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
658 CFS_ALLOC_PTR_ARRAY(hash, LNET_REMOTE_NETS_HASH_SIZE);
660 CERROR("Failed to create remote nets hash table\n");
664 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
665 INIT_LIST_HEAD(&hash[i]);
666 the_lnet.ln_remote_nets_hash = hash;
671 lnet_destroy_remote_nets_table(void)
675 if (the_lnet.ln_remote_nets_hash == NULL)
678 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
679 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
681 CFS_FREE_PTR_ARRAY(the_lnet.ln_remote_nets_hash,
682 LNET_REMOTE_NETS_HASH_SIZE);
683 the_lnet.ln_remote_nets_hash = NULL;
687 lnet_destroy_locks(void)
689 if (the_lnet.ln_res_lock != NULL) {
690 cfs_percpt_lock_free(the_lnet.ln_res_lock);
691 the_lnet.ln_res_lock = NULL;
694 if (the_lnet.ln_net_lock != NULL) {
695 cfs_percpt_lock_free(the_lnet.ln_net_lock);
696 the_lnet.ln_net_lock = NULL;
701 lnet_create_locks(void)
705 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
706 if (the_lnet.ln_res_lock == NULL)
709 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
710 if (the_lnet.ln_net_lock == NULL)
716 lnet_destroy_locks();
720 static void lnet_assert_wire_constants(void)
722 /* Wire protocol assertions generated by 'wirecheck'
723 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
724 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
725 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)
729 BUILD_BUG_ON(LNET_PROTO_TCP_MAGIC != 0xeebc0ded);
730 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MAJOR != 1);
731 BUILD_BUG_ON(LNET_PROTO_TCP_VERSION_MINOR != 0);
732 BUILD_BUG_ON(LNET_MSG_ACK != 0);
733 BUILD_BUG_ON(LNET_MSG_PUT != 1);
734 BUILD_BUG_ON(LNET_MSG_GET != 2);
735 BUILD_BUG_ON(LNET_MSG_REPLY != 3);
736 BUILD_BUG_ON(LNET_MSG_HELLO != 4);
738 BUILD_BUG_ON((int)sizeof(lnet_nid_t) != 8);
739 BUILD_BUG_ON((int)sizeof(lnet_pid_t) != 4);
741 /* Checks for struct lnet_process_id_packed */
742 BUILD_BUG_ON((int)sizeof(struct lnet_process_id_packed) != 12);
743 BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, nid) != 0);
744 BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->nid) != 8);
745 BUILD_BUG_ON((int)offsetof(struct lnet_process_id_packed, pid) != 8);
746 BUILD_BUG_ON((int)sizeof(((struct lnet_process_id_packed *)0)->pid) != 4);
748 /* Checks for struct lnet_handle_wire */
749 BUILD_BUG_ON((int)sizeof(struct lnet_handle_wire) != 16);
750 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
751 wh_interface_cookie) != 0);
752 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) != 8);
753 BUILD_BUG_ON((int)offsetof(struct lnet_handle_wire,
754 wh_object_cookie) != 8);
755 BUILD_BUG_ON((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) != 8);
757 /* Checks for struct struct lnet_magicversion */
758 BUILD_BUG_ON((int)sizeof(struct lnet_magicversion) != 8);
759 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, magic) != 0);
760 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->magic) != 4);
761 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion, version_major) != 4);
762 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_major) != 2);
763 BUILD_BUG_ON((int)offsetof(struct lnet_magicversion,
764 version_minor) != 6);
765 BUILD_BUG_ON((int)sizeof(((struct lnet_magicversion *)0)->version_minor) != 2);
767 /* Checks for struct struct lnet_hdr */
768 BUILD_BUG_ON((int)sizeof(struct lnet_hdr) != 72);
769 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_nid) != 0);
770 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_nid) != 8);
771 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_nid) != 8);
772 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_nid) != 8);
773 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, dest_pid) != 16);
774 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->dest_pid) != 4);
775 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, src_pid) != 20);
776 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->src_pid) != 4);
777 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, type) != 24);
778 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->type) != 4);
779 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, payload_length) != 28);
780 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->payload_length) != 4);
781 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg) != 32);
782 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg) != 40);
785 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) != 32);
786 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) != 16);
787 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.match_bits) != 48);
788 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) != 8);
789 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.ack.mlength) != 56);
790 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) != 4);
793 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) != 32);
794 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) != 16);
795 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.match_bits) != 48);
796 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) != 8);
797 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.hdr_data) != 56);
798 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) != 8);
799 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.ptl_index) != 64);
800 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) != 4);
801 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.put.offset) != 68);
802 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) != 4);
805 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.return_wmd) != 32);
806 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) != 16);
807 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.match_bits) != 48);
808 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) != 8);
809 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.ptl_index) != 56);
810 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) != 4);
811 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.src_offset) != 60);
812 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) != 4);
813 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.get.sink_length) != 64);
814 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) != 4);
817 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) != 32);
818 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) != 16);
821 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.incarnation) != 32);
822 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) != 8);
823 BUILD_BUG_ON((int)offsetof(struct lnet_hdr, msg.hello.type) != 40);
824 BUILD_BUG_ON((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) != 4);
826 /* Checks for struct lnet_ni_status and related constants */
827 BUILD_BUG_ON(LNET_NI_STATUS_INVALID != 0x00000000);
828 BUILD_BUG_ON(LNET_NI_STATUS_UP != 0x15aac0de);
829 BUILD_BUG_ON(LNET_NI_STATUS_DOWN != 0xdeadface);
831 /* Checks for struct lnet_ni_status */
832 BUILD_BUG_ON((int)sizeof(struct lnet_ni_status) != 16);
833 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_nid) != 0);
834 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_nid) != 8);
835 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_status) != 8);
836 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_status) != 4);
837 BUILD_BUG_ON((int)offsetof(struct lnet_ni_status, ns_unused) != 12);
838 BUILD_BUG_ON((int)sizeof(((struct lnet_ni_status *)0)->ns_unused) != 4);
840 /* Checks for struct lnet_ping_info and related constants */
841 BUILD_BUG_ON(LNET_PROTO_PING_MAGIC != 0x70696E67);
842 BUILD_BUG_ON(LNET_PING_FEAT_INVAL != 0);
843 BUILD_BUG_ON(LNET_PING_FEAT_BASE != 1);
844 BUILD_BUG_ON(LNET_PING_FEAT_NI_STATUS != 2);
845 BUILD_BUG_ON(LNET_PING_FEAT_RTE_DISABLED != 4);
846 BUILD_BUG_ON(LNET_PING_FEAT_MULTI_RAIL != 8);
847 BUILD_BUG_ON(LNET_PING_FEAT_DISCOVERY != 16);
848 BUILD_BUG_ON(LNET_PING_FEAT_BITS != 31);
850 /* Checks for struct lnet_ping_info */
851 BUILD_BUG_ON((int)sizeof(struct lnet_ping_info) != 16);
852 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_magic) != 0);
853 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_magic) != 4);
854 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_features) != 4);
855 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_features) != 4);
856 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_pid) != 8);
857 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_pid) != 4);
858 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_nnis) != 12);
859 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_nnis) != 4);
860 BUILD_BUG_ON((int)offsetof(struct lnet_ping_info, pi_ni) != 16);
861 BUILD_BUG_ON((int)sizeof(((struct lnet_ping_info *)0)->pi_ni) != 0);
863 /* Acceptor connection request */
864 BUILD_BUG_ON(LNET_PROTO_ACCEPTOR_VERSION != 1);
866 /* Checks for struct lnet_acceptor_connreq */
867 BUILD_BUG_ON((int)sizeof(struct lnet_acceptor_connreq) != 16);
868 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_magic) != 0);
869 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_magic) != 4);
870 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_version) != 4);
871 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_version) != 4);
872 BUILD_BUG_ON((int)offsetof(struct lnet_acceptor_connreq, acr_nid) != 8);
873 BUILD_BUG_ON((int)sizeof(((struct lnet_acceptor_connreq *)0)->acr_nid) != 8);
875 /* Checks for struct lnet_counters_common */
876 BUILD_BUG_ON((int)sizeof(struct lnet_counters_common) != 60);
877 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_alloc) != 0);
878 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_alloc) != 4);
879 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_msgs_max) != 4);
880 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_msgs_max) != 4);
881 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_errors) != 8);
882 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_errors) != 4);
883 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_count) != 12);
884 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_count) != 4);
885 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_count) != 16);
886 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_count) != 4);
887 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_count) != 20);
888 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_count) != 4);
889 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_count) != 24);
890 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_count) != 4);
891 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_send_length) != 28);
892 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_send_length) != 8);
893 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_recv_length) != 36);
894 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_recv_length) != 8);
895 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_route_length) != 44);
896 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_route_length) != 8);
897 BUILD_BUG_ON((int)offsetof(struct lnet_counters_common, lcc_drop_length) != 52);
898 BUILD_BUG_ON((int)sizeof(((struct lnet_counters_common *)0)->lcc_drop_length) != 8);
901 static const struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
903 const struct lnet_lnd *lnd;
905 /* holding lnd mutex */
906 if (type >= NUM_LNDS)
908 lnd = the_lnet.ln_lnds[type];
909 LASSERT(!lnd || lnd->lnd_type == type);
915 lnet_get_lnd_timeout(void)
917 return lnet_lnd_timeout;
919 EXPORT_SYMBOL(lnet_get_lnd_timeout);
922 lnet_register_lnd(const struct lnet_lnd *lnd)
924 mutex_lock(&the_lnet.ln_lnd_mutex);
926 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
927 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
929 the_lnet.ln_lnds[lnd->lnd_type] = lnd;
931 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
933 mutex_unlock(&the_lnet.ln_lnd_mutex);
935 EXPORT_SYMBOL(lnet_register_lnd);
938 lnet_unregister_lnd(const struct lnet_lnd *lnd)
940 mutex_lock(&the_lnet.ln_lnd_mutex);
942 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
944 the_lnet.ln_lnds[lnd->lnd_type] = NULL;
945 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
947 mutex_unlock(&the_lnet.ln_lnd_mutex);
949 EXPORT_SYMBOL(lnet_unregister_lnd);
952 lnet_counters_get_common_locked(struct lnet_counters_common *common)
954 struct lnet_counters *ctr;
957 /* FIXME !!! Their is no assert_lnet_net_locked() to ensure this
958 * actually called under the protection of the lnet_net_lock.
960 memset(common, 0, sizeof(*common));
962 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
963 common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
964 common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
965 common->lcc_errors += ctr->lct_common.lcc_errors;
966 common->lcc_send_count += ctr->lct_common.lcc_send_count;
967 common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
968 common->lcc_route_count += ctr->lct_common.lcc_route_count;
969 common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
970 common->lcc_send_length += ctr->lct_common.lcc_send_length;
971 common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
972 common->lcc_route_length += ctr->lct_common.lcc_route_length;
973 common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
978 lnet_counters_get_common(struct lnet_counters_common *common)
980 lnet_net_lock(LNET_LOCK_EX);
981 lnet_counters_get_common_locked(common);
982 lnet_net_unlock(LNET_LOCK_EX);
984 EXPORT_SYMBOL(lnet_counters_get_common);
987 lnet_counters_get(struct lnet_counters *counters)
989 struct lnet_counters *ctr;
990 struct lnet_counters_health *health = &counters->lct_health;
993 memset(counters, 0, sizeof(*counters));
995 lnet_net_lock(LNET_LOCK_EX);
997 if (the_lnet.ln_state != LNET_STATE_RUNNING)
998 GOTO(out_unlock, rc = -ENODEV);
1000 lnet_counters_get_common_locked(&counters->lct_common);
1002 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
1003 health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
1004 health->lch_resend_count += ctr->lct_health.lch_resend_count;
1005 health->lch_response_timeout_count +=
1006 ctr->lct_health.lch_response_timeout_count;
1007 health->lch_local_interrupt_count +=
1008 ctr->lct_health.lch_local_interrupt_count;
1009 health->lch_local_dropped_count +=
1010 ctr->lct_health.lch_local_dropped_count;
1011 health->lch_local_aborted_count +=
1012 ctr->lct_health.lch_local_aborted_count;
1013 health->lch_local_no_route_count +=
1014 ctr->lct_health.lch_local_no_route_count;
1015 health->lch_local_timeout_count +=
1016 ctr->lct_health.lch_local_timeout_count;
1017 health->lch_local_error_count +=
1018 ctr->lct_health.lch_local_error_count;
1019 health->lch_remote_dropped_count +=
1020 ctr->lct_health.lch_remote_dropped_count;
1021 health->lch_remote_error_count +=
1022 ctr->lct_health.lch_remote_error_count;
1023 health->lch_remote_timeout_count +=
1024 ctr->lct_health.lch_remote_timeout_count;
1025 health->lch_network_timeout_count +=
1026 ctr->lct_health.lch_network_timeout_count;
1029 lnet_net_unlock(LNET_LOCK_EX);
1032 EXPORT_SYMBOL(lnet_counters_get);
1035 lnet_counters_reset(void)
1037 struct lnet_counters *counters;
1040 lnet_net_lock(LNET_LOCK_EX);
1042 if (the_lnet.ln_state != LNET_STATE_RUNNING)
1045 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
1046 memset(counters, 0, sizeof(struct lnet_counters));
1048 lnet_net_unlock(LNET_LOCK_EX);
1052 lnet_res_type2str(int type)
1057 case LNET_COOKIE_TYPE_MD:
1059 case LNET_COOKIE_TYPE_ME:
1061 case LNET_COOKIE_TYPE_EQ:
1067 lnet_res_container_cleanup(struct lnet_res_container *rec)
1071 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
1074 while (!list_empty(&rec->rec_active)) {
1075 struct list_head *e = rec->rec_active.next;
1078 if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
1079 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
1081 } else { /* NB: Active MEs should be attached on portals */
1088 /* Found alive MD/ME/EQ, user really should unlink/free
1089 * all of them before finalize LNet, but if someone didn't,
1090 * we have to recycle garbage for him */
1091 CERROR("%d active elements on exit of %s container\n",
1092 count, lnet_res_type2str(rec->rec_type));
1095 if (rec->rec_lh_hash != NULL) {
1096 CFS_FREE_PTR_ARRAY(rec->rec_lh_hash, LNET_LH_HASH_SIZE);
1097 rec->rec_lh_hash = NULL;
1100 rec->rec_type = 0; /* mark it as finalized */
1104 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
1109 LASSERT(rec->rec_type == 0);
1111 rec->rec_type = type;
1112 INIT_LIST_HEAD(&rec->rec_active);
1114 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
1116 /* Arbitrary choice of hash table size */
1117 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
1118 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
1119 if (rec->rec_lh_hash == NULL) {
1124 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
1125 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
1130 CERROR("Failed to setup %s resource container\n",
1131 lnet_res_type2str(type));
1132 lnet_res_container_cleanup(rec);
1137 lnet_res_containers_destroy(struct lnet_res_container **recs)
1139 struct lnet_res_container *rec;
1142 cfs_percpt_for_each(rec, i, recs)
1143 lnet_res_container_cleanup(rec);
1145 cfs_percpt_free(recs);
1148 static struct lnet_res_container **
1149 lnet_res_containers_create(int type)
1151 struct lnet_res_container **recs;
1152 struct lnet_res_container *rec;
1156 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
1158 CERROR("Failed to allocate %s resource containers\n",
1159 lnet_res_type2str(type));
1163 cfs_percpt_for_each(rec, i, recs) {
1164 rc = lnet_res_container_setup(rec, i, type);
1166 lnet_res_containers_destroy(recs);
1174 struct lnet_libhandle *
1175 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
1177 /* ALWAYS called with lnet_res_lock held */
1178 struct list_head *head;
1179 struct lnet_libhandle *lh;
1182 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
1185 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
1186 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
1188 list_for_each_entry(lh, head, lh_hash_chain) {
1189 if (lh->lh_cookie == cookie)
1197 lnet_res_lh_initialize(struct lnet_res_container *rec,
1198 struct lnet_libhandle *lh)
1200 /* ALWAYS called with lnet_res_lock held */
1201 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
1204 lh->lh_cookie = rec->rec_lh_cookie;
1205 rec->rec_lh_cookie += 1 << ibits;
1207 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
1209 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
1213 lnet_create_array_of_queues(void)
1215 struct list_head **qs;
1216 struct list_head *q;
1219 qs = cfs_percpt_alloc(lnet_cpt_table(),
1220 sizeof(struct list_head));
1222 CERROR("Failed to allocate queues\n");
1226 cfs_percpt_for_each(q, i, qs)
1232 static int lnet_unprepare(void);
1235 lnet_prepare(lnet_pid_t requested_pid)
1237 /* Prepare to bring up the network */
1238 struct lnet_res_container **recs;
1241 if (requested_pid == LNET_PID_ANY) {
1242 /* Don't instantiate LNET just for me */
1246 LASSERT(the_lnet.ln_refcount == 0);
1248 the_lnet.ln_routing = 0;
1250 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
1251 the_lnet.ln_pid = requested_pid;
1253 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
1254 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
1255 INIT_LIST_HEAD(&the_lnet.ln_nets);
1256 INIT_LIST_HEAD(&the_lnet.ln_routers);
1257 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
1258 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
1259 INIT_LIST_HEAD(&the_lnet.ln_dc_request);
1260 INIT_LIST_HEAD(&the_lnet.ln_dc_working);
1261 INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
1262 INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
1263 INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
1264 INIT_LIST_HEAD(&the_lnet.ln_udsp_list);
1265 init_waitqueue_head(&the_lnet.ln_dc_waitq);
1266 the_lnet.ln_mt_handler = NULL;
1267 init_completion(&the_lnet.ln_started);
1269 rc = lnet_slab_setup();
1273 rc = lnet_create_remote_nets_table();
1278 * NB the interface cookie in wire handles guards against delayed
1279 * replies and ACKs appearing valid after reboot.
1281 the_lnet.ln_interface_cookie = ktime_get_real_ns();
1283 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
1284 sizeof(struct lnet_counters));
1285 if (the_lnet.ln_counters == NULL) {
1286 CERROR("Failed to allocate counters for LNet\n");
1291 rc = lnet_peer_tables_create();
1295 rc = lnet_msg_containers_create();
1299 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
1300 LNET_COOKIE_TYPE_EQ);
1304 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
1310 the_lnet.ln_md_containers = recs;
1312 rc = lnet_portals_create();
1314 CERROR("Failed to create portals for LNet: %d\n", rc);
1318 the_lnet.ln_mt_zombie_rstqs = lnet_create_array_of_queues();
1319 if (!the_lnet.ln_mt_zombie_rstqs) {
1332 lnet_unprepare (void)
1334 /* NB no LNET_LOCK since this is the last reference. All LND instances
1335 * have shut down already, so it is safe to unlink and free all
1336 * descriptors, even those that appear committed to a network op (eg MD
1337 * with non-zero pending count) */
1339 lnet_fail_nid(LNET_NID_ANY, 0);
1341 LASSERT(the_lnet.ln_refcount == 0);
1342 LASSERT(list_empty(&the_lnet.ln_test_peers));
1343 LASSERT(list_empty(&the_lnet.ln_nets));
1345 if (the_lnet.ln_mt_zombie_rstqs) {
1346 lnet_clean_zombie_rstqs();
1347 the_lnet.ln_mt_zombie_rstqs = NULL;
1350 lnet_assert_handler_unused(the_lnet.ln_mt_handler);
1351 the_lnet.ln_mt_handler = NULL;
1353 lnet_portals_destroy();
1355 if (the_lnet.ln_md_containers != NULL) {
1356 lnet_res_containers_destroy(the_lnet.ln_md_containers);
1357 the_lnet.ln_md_containers = NULL;
1360 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
1362 lnet_msg_containers_destroy();
1364 lnet_rtrpools_free(0);
1366 if (the_lnet.ln_counters != NULL) {
1367 cfs_percpt_free(the_lnet.ln_counters);
1368 the_lnet.ln_counters = NULL;
1370 lnet_destroy_remote_nets_table();
1371 lnet_udsp_destroy(true);
1372 lnet_slab_cleanup();
1378 lnet_net2ni_locked(__u32 net_id, int cpt)
1381 struct lnet_net *net;
1383 LASSERT(cpt != LNET_LOCK_EX);
1385 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1386 if (net->net_id == net_id) {
1387 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
1397 lnet_net2ni_addref(__u32 net)
1402 ni = lnet_net2ni_locked(net, 0);
1404 lnet_ni_addref_locked(ni, 0);
1409 EXPORT_SYMBOL(lnet_net2ni_addref);
1412 lnet_get_net_locked(__u32 net_id)
1414 struct lnet_net *net;
1416 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1417 if (net->net_id == net_id)
1425 lnet_net_clr_pref_rtrs(struct lnet_net *net)
1427 struct list_head zombies;
1428 struct lnet_nid_list *ne;
1429 struct lnet_nid_list *tmp;
1431 INIT_LIST_HEAD(&zombies);
1433 lnet_net_lock(LNET_LOCK_EX);
1434 list_splice_init(&net->net_rtr_pref_nids, &zombies);
1435 lnet_net_unlock(LNET_LOCK_EX);
1437 list_for_each_entry_safe(ne, tmp, &zombies, nl_list) {
1438 list_del_init(&ne->nl_list);
1439 LIBCFS_FREE(ne, sizeof(*ne));
1444 lnet_net_add_pref_rtr(struct lnet_net *net,
1446 __must_hold(&the_lnet.ln_api_mutex)
1448 struct lnet_nid_list *ne;
1450 /* This function is called with api_mutex held. When the api_mutex
1451 * is held the list can not be modified, as it is only modified as
1452 * a result of applying a UDSP and that happens under api_mutex
1455 list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
1456 if (ne->nl_nid == gw_nid)
1460 LIBCFS_ALLOC(ne, sizeof(*ne));
1464 ne->nl_nid = gw_nid;
1466 /* Lock the cpt to protect against addition and checks in the
1467 * selection algorithm
1469 lnet_net_lock(LNET_LOCK_EX);
1470 list_add(&ne->nl_list, &net->net_rtr_pref_nids);
1471 lnet_net_unlock(LNET_LOCK_EX);
1477 lnet_net_is_pref_rtr_locked(struct lnet_net *net, lnet_nid_t rtr_nid)
1479 struct lnet_nid_list *ne;
1481 CDEBUG(D_NET, "%s: rtr pref emtpy: %d\n",
1482 libcfs_net2str(net->net_id),
1483 list_empty(&net->net_rtr_pref_nids));
1485 if (list_empty(&net->net_rtr_pref_nids))
1488 list_for_each_entry(ne, &net->net_rtr_pref_nids, nl_list) {
1489 CDEBUG(D_NET, "Comparing pref %s with gw %s\n",
1490 libcfs_nid2str(ne->nl_nid),
1491 libcfs_nid2str(rtr_nid));
1492 if (rtr_nid == ne->nl_nid)
1500 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
1505 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
1510 val = hash_long(key, LNET_CPT_BITS);
1511 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
1515 return (unsigned int)(key + val + (val >> 1)) % number;
1519 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
1521 struct lnet_net *net;
1523 /* must called with hold of lnet_net_lock */
1524 if (LNET_CPT_NUMBER == 1)
1525 return 0; /* the only one */
1528 * If NI is provided then use the CPT identified in the NI cpt
1529 * list if one exists. If one doesn't exist, then that NI is
1530 * associated with all CPTs and it follows that the net it belongs
1531 * to is implicitly associated with all CPTs, so just hash the nid
1535 if (ni->ni_cpts != NULL)
1536 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
1539 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1542 /* no NI provided so look at the net */
1543 net = lnet_get_net_locked(LNET_NIDNET(nid));
1545 if (net != NULL && net->net_cpts != NULL) {
1546 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
1549 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1553 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
1558 if (LNET_CPT_NUMBER == 1)
1559 return 0; /* the only one */
1561 cpt = lnet_net_lock_current();
1563 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
1565 lnet_net_unlock(cpt);
1569 EXPORT_SYMBOL(lnet_cpt_of_nid);
1572 lnet_islocalnet_locked(__u32 net_id)
1574 struct lnet_net *net;
1577 net = lnet_get_net_locked(net_id);
1579 local = net != NULL;
1585 lnet_islocalnet(__u32 net_id)
1590 cpt = lnet_net_lock_current();
1592 local = lnet_islocalnet_locked(net_id);
1594 lnet_net_unlock(cpt);
1600 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
1602 struct lnet_net *net;
1605 LASSERT(cpt != LNET_LOCK_EX);
1607 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1608 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1609 if (ni->ni_nid == nid)
1618 lnet_nid2ni_addref(lnet_nid_t nid)
1623 ni = lnet_nid2ni_locked(nid, 0);
1625 lnet_ni_addref_locked(ni, 0);
1630 EXPORT_SYMBOL(lnet_nid2ni_addref);
1633 lnet_islocalnid(lnet_nid_t nid)
1638 cpt = lnet_net_lock_current();
1639 ni = lnet_nid2ni_locked(nid, cpt);
1640 lnet_net_unlock(cpt);
1646 lnet_count_acceptor_nets(void)
1648 /* Return the # of NIs that need the acceptor. */
1650 struct lnet_net *net;
1653 cpt = lnet_net_lock_current();
1654 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1655 /* all socklnd type networks should have the acceptor
1657 if (net->net_lnd->lnd_accept != NULL)
1661 lnet_net_unlock(cpt);
1666 struct lnet_ping_buffer *
1667 lnet_ping_buffer_alloc(int nnis, gfp_t gfp)
1669 struct lnet_ping_buffer *pbuf;
1671 LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nnis), gfp);
1673 pbuf->pb_nnis = nnis;
1674 pbuf->pb_needs_post = false;
1675 atomic_set(&pbuf->pb_refcnt, 1);
1682 lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf)
1684 LASSERT(atomic_read(&pbuf->pb_refcnt) == 0);
1685 LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nnis));
1688 static struct lnet_ping_buffer *
1689 lnet_ping_target_create(int nnis)
1691 struct lnet_ping_buffer *pbuf;
1693 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1695 CERROR("Can't allocate ping source [%d]\n", nnis);
1699 pbuf->pb_info.pi_nnis = nnis;
1700 pbuf->pb_info.pi_pid = the_lnet.ln_pid;
1701 pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
1702 pbuf->pb_info.pi_features =
1703 LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
1709 lnet_get_net_ni_count_locked(struct lnet_net *net)
1714 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1721 lnet_get_net_ni_count_pre(struct lnet_net *net)
1726 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1733 lnet_get_ni_count(void)
1736 struct lnet_net *net;
1741 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1742 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1752 lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
1754 struct lnet_ni_status *stat;
1758 __swab32s(&pbuf->pb_info.pi_magic);
1759 __swab32s(&pbuf->pb_info.pi_features);
1760 __swab32s(&pbuf->pb_info.pi_pid);
1761 __swab32s(&pbuf->pb_info.pi_nnis);
1762 nnis = pbuf->pb_info.pi_nnis;
1763 if (nnis > pbuf->pb_nnis)
1764 nnis = pbuf->pb_nnis;
1765 for (i = 0; i < nnis; i++) {
1766 stat = &pbuf->pb_info.pi_ni[i];
1767 __swab64s(&stat->ns_nid);
1768 __swab32s(&stat->ns_status);
1773 lnet_ping_info_validate(struct lnet_ping_info *pinfo)
1777 if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
1779 if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
1781 /* Loopback is guaranteed to be present */
1782 if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
1784 if (LNET_PING_INFO_LONI(pinfo) != LNET_NID_LO_0)
1790 lnet_ping_target_destroy(void)
1792 struct lnet_net *net;
1795 lnet_net_lock(LNET_LOCK_EX);
1797 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1798 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1800 ni->ni_status = NULL;
1805 lnet_ping_buffer_decref(the_lnet.ln_ping_target);
1806 the_lnet.ln_ping_target = NULL;
1808 lnet_net_unlock(LNET_LOCK_EX);
1812 lnet_ping_target_event_handler(struct lnet_event *event)
1814 struct lnet_ping_buffer *pbuf = event->md_user_ptr;
1816 if (event->unlinked)
1817 lnet_ping_buffer_decref(pbuf);
1821 lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
1822 struct lnet_handle_md *ping_mdh,
1823 int ni_count, bool set_eq)
1825 struct lnet_process_id id = {
1826 .nid = LNET_NID_ANY,
1830 struct lnet_md md = { NULL };
1834 the_lnet.ln_ping_target_handler =
1835 lnet_ping_target_event_handler;
1837 *ppbuf = lnet_ping_target_create(ni_count);
1838 if (*ppbuf == NULL) {
1843 /* Ping target ME/MD */
1844 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1845 LNET_PROTO_PING_MATCHBITS, 0,
1846 LNET_UNLINK, LNET_INS_AFTER);
1849 CERROR("Can't create ping target ME: %d\n", rc);
1850 goto fail_decref_ping_buffer;
1853 /* initialize md content */
1854 md.start = &(*ppbuf)->pb_info;
1855 md.length = LNET_PING_INFO_SIZE((*ppbuf)->pb_nnis);
1856 md.threshold = LNET_MD_THRESH_INF;
1858 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1859 LNET_MD_MANAGE_REMOTE;
1860 md.handler = the_lnet.ln_ping_target_handler;
1861 md.user_ptr = *ppbuf;
1863 rc = LNetMDAttach(me, &md, LNET_RETAIN, ping_mdh);
1865 CERROR("Can't attach ping target MD: %d\n", rc);
1866 goto fail_decref_ping_buffer;
1868 lnet_ping_buffer_addref(*ppbuf);
1872 fail_decref_ping_buffer:
1873 LASSERT(atomic_read(&(*ppbuf)->pb_refcnt) == 1);
1874 lnet_ping_buffer_decref(*ppbuf);
1881 lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
1882 struct lnet_handle_md *ping_mdh)
1884 LNetMDUnlink(*ping_mdh);
1885 LNetInvalidateMDHandle(ping_mdh);
1887 /* NB the MD could be busy; this just starts the unlink */
1888 wait_var_event_warning(&pbuf->pb_refcnt,
1889 atomic_read(&pbuf->pb_refcnt) <= 1,
1890 "Still waiting for ping data MD to unlink\n");
1894 lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
1897 struct lnet_net *net;
1898 struct lnet_ni_status *ns;
1903 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1904 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1905 LASSERT(i < pbuf->pb_nnis);
1907 ns = &pbuf->pb_info.pi_ni[i];
1909 ns->ns_nid = ni->ni_nid;
1912 ns->ns_status = lnet_ni_get_status_locked(ni);
1920 * We (ab)use the ns_status of the loopback interface to
1921 * transmit the sequence number. The first interface listed
1922 * must be the loopback interface.
1924 rc = lnet_ping_info_validate(&pbuf->pb_info);
1926 LCONSOLE_EMERG("Invalid ping target: %d\n", rc);
1929 LNET_PING_BUFFER_SEQNO(pbuf) =
1930 atomic_inc_return(&the_lnet.ln_ping_target_seqno);
1934 lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
1935 struct lnet_handle_md ping_mdh)
1937 struct lnet_ping_buffer *old_pbuf = NULL;
1938 struct lnet_handle_md old_ping_md;
1940 /* switch the NIs to point to the new ping info created */
1941 lnet_net_lock(LNET_LOCK_EX);
1943 if (!the_lnet.ln_routing)
1944 pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1945 if (!lnet_peer_discovery_disabled)
1946 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
1948 /* Ensure only known feature bits have been set. */
1949 LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
1950 LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
1952 lnet_ping_target_install_locked(pbuf);
1954 if (the_lnet.ln_ping_target) {
1955 old_pbuf = the_lnet.ln_ping_target;
1956 old_ping_md = the_lnet.ln_ping_target_md;
1958 the_lnet.ln_ping_target_md = ping_mdh;
1959 the_lnet.ln_ping_target = pbuf;
1961 lnet_net_unlock(LNET_LOCK_EX);
1964 /* unlink and free the old ping info */
1965 lnet_ping_md_unlink(old_pbuf, &old_ping_md);
1966 lnet_ping_buffer_decref(old_pbuf);
1969 lnet_push_update_to_peers(0);
1973 lnet_ping_target_fini(void)
1975 lnet_ping_md_unlink(the_lnet.ln_ping_target,
1976 &the_lnet.ln_ping_target_md);
1978 lnet_assert_handler_unused(the_lnet.ln_ping_target_handler);
1979 lnet_ping_target_destroy();
1982 /* Resize the push target. */
1983 int lnet_push_target_resize(void)
1985 struct lnet_handle_md mdh;
1986 struct lnet_handle_md old_mdh;
1987 struct lnet_ping_buffer *pbuf;
1988 struct lnet_ping_buffer *old_pbuf;
1993 nnis = the_lnet.ln_push_target_nnis;
1995 CDEBUG(D_NET, "Invalid nnis %d\n", nnis);
1999 /* NB: lnet_ping_buffer_alloc() sets pbuf refcount to 1. That ref is
2000 * dropped when we need to resize again (see "old_pbuf" below) or when
2001 * LNet is shutdown (see lnet_push_target_fini())
2003 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
2005 CDEBUG(D_NET, "Can't allocate pbuf for nnis %d\n", nnis);
2009 rc = lnet_push_target_post(pbuf, &mdh);
2011 CDEBUG(D_NET, "Failed to post push target: %d\n", rc);
2012 lnet_ping_buffer_decref(pbuf);
2016 lnet_net_lock(LNET_LOCK_EX);
2017 old_pbuf = the_lnet.ln_push_target;
2018 old_mdh = the_lnet.ln_push_target_md;
2019 the_lnet.ln_push_target = pbuf;
2020 the_lnet.ln_push_target_md = mdh;
2021 lnet_net_unlock(LNET_LOCK_EX);
2024 LNetMDUnlink(old_mdh);
2025 /* Drop ref set by lnet_ping_buffer_alloc() */
2026 lnet_ping_buffer_decref(old_pbuf);
2029 /* Received another push or reply that requires a larger buffer */
2030 if (nnis < the_lnet.ln_push_target_nnis)
2033 CDEBUG(D_NET, "nnis %d success\n", nnis);
2037 int lnet_push_target_post(struct lnet_ping_buffer *pbuf,
2038 struct lnet_handle_md *mdhp)
2040 struct lnet_process_id id = { LNET_NID_ANY, LNET_PID_ANY };
2041 struct lnet_md md = { NULL };
2045 me = LNetMEAttach(LNET_RESERVED_PORTAL, id,
2046 LNET_PROTO_PING_MATCHBITS, 0,
2047 LNET_UNLINK, LNET_INS_AFTER);
2050 CERROR("Can't create push target ME: %d\n", rc);
2054 pbuf->pb_needs_post = false;
2056 /* This reference is dropped by lnet_push_target_event_handler() */
2057 lnet_ping_buffer_addref(pbuf);
2059 /* initialize md content */
2060 md.start = &pbuf->pb_info;
2061 md.length = LNET_PING_INFO_SIZE(pbuf->pb_nnis);
2064 md.options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE;
2066 md.handler = the_lnet.ln_push_target_handler;
2068 rc = LNetMDAttach(me, &md, LNET_UNLINK, mdhp);
2070 CERROR("Can't attach push MD: %d\n", rc);
2071 lnet_ping_buffer_decref(pbuf);
2072 pbuf->pb_needs_post = true;
2076 CDEBUG(D_NET, "posted push target %p\n", pbuf);
2081 static void lnet_push_target_event_handler(struct lnet_event *ev)
2083 struct lnet_ping_buffer *pbuf = ev->md_user_ptr;
2085 CDEBUG(D_NET, "type %d status %d unlinked %d\n", ev->type, ev->status,
2088 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
2089 lnet_swap_pinginfo(pbuf);
2091 if (ev->type == LNET_EVENT_UNLINK) {
2092 /* Drop ref added by lnet_push_target_post() */
2093 lnet_ping_buffer_decref(pbuf);
2097 lnet_peer_push_event(ev);
2099 /* Drop ref added by lnet_push_target_post */
2100 lnet_ping_buffer_decref(pbuf);
2103 /* Initialize the push target. */
2104 static int lnet_push_target_init(void)
2108 if (the_lnet.ln_push_target)
2111 the_lnet.ln_push_target_handler =
2112 lnet_push_target_event_handler;
2114 rc = LNetSetLazyPortal(LNET_RESERVED_PORTAL);
2117 /* Start at the required minimum, we'll enlarge if required. */
2118 the_lnet.ln_push_target_nnis = LNET_INTERFACES_MIN;
2120 rc = lnet_push_target_resize();
2123 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2124 the_lnet.ln_push_target_handler = NULL;
2130 /* Clean up the push target. */
2131 static void lnet_push_target_fini(void)
2133 if (!the_lnet.ln_push_target)
2136 /* Unlink and invalidate to prevent new references. */
2137 LNetMDUnlink(the_lnet.ln_push_target_md);
2138 LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
2140 /* Wait for the unlink to complete. */
2141 wait_var_event_warning(&the_lnet.ln_push_target->pb_refcnt,
2142 atomic_read(&the_lnet.ln_push_target->pb_refcnt) <= 1,
2143 "Still waiting for ping data MD to unlink\n");
2145 /* Drop ref set by lnet_ping_buffer_alloc() */
2146 lnet_ping_buffer_decref(the_lnet.ln_push_target);
2147 the_lnet.ln_push_target = NULL;
2148 the_lnet.ln_push_target_nnis = 0;
2150 LNetClearLazyPortal(LNET_RESERVED_PORTAL);
2151 lnet_assert_handler_unused(the_lnet.ln_push_target_handler);
2152 the_lnet.ln_push_target_handler = NULL;
2156 lnet_ni_tq_credits(struct lnet_ni *ni)
2160 LASSERT(ni->ni_ncpts >= 1);
2162 if (ni->ni_ncpts == 1)
2163 return ni->ni_net->net_tunables.lct_max_tx_credits;
2165 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
2166 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
2167 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
2173 lnet_ni_unlink_locked(struct lnet_ni *ni)
2175 /* move it to zombie list and nobody can find it anymore */
2176 LASSERT(!list_empty(&ni->ni_netlist));
2177 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
2178 lnet_ni_decref_locked(ni, 0);
2182 lnet_clear_zombies_nis_locked(struct lnet_net *net)
2187 struct list_head *zombie_list = &net->net_ni_zombie;
2190 * Now wait for the NIs I just nuked to show up on the zombie
2191 * list and shut them down in guaranteed thread context
2194 while (!list_empty(zombie_list)) {
2198 ni = list_entry(zombie_list->next,
2199 struct lnet_ni, ni_netlist);
2200 list_del_init(&ni->ni_netlist);
2201 /* the ni should be in deleting state. If it's not it's
2203 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
2204 cfs_percpt_for_each(ref, j, ni->ni_refs) {
2207 /* still busy, add it back to zombie list */
2208 list_add(&ni->ni_netlist, zombie_list);
2212 if (!list_empty(&ni->ni_netlist)) {
2213 /* Unlock mutex while waiting to allow other
2214 * threads to read the LNet state and fall through
2217 lnet_net_unlock(LNET_LOCK_EX);
2218 mutex_unlock(&the_lnet.ln_api_mutex);
2221 if ((i & (-i)) == i) {
2223 "Waiting for zombie LNI %s\n",
2224 libcfs_nid2str(ni->ni_nid));
2226 schedule_timeout_uninterruptible(cfs_time_seconds(1));
2228 mutex_lock(&the_lnet.ln_api_mutex);
2229 lnet_net_lock(LNET_LOCK_EX);
2233 lnet_net_unlock(LNET_LOCK_EX);
2235 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
2237 LASSERT(!in_interrupt());
2238 /* Holding the mutex makes it safe for lnd_shutdown
2239 * to call module_put(). Module unload cannot finish
2240 * until lnet_unregister_lnd() completes, and that
2241 * requires the mutex.
2243 mutex_lock(&the_lnet.ln_lnd_mutex);
2244 (net->net_lnd->lnd_shutdown)(ni);
2245 mutex_unlock(&the_lnet.ln_lnd_mutex);
2248 CDEBUG(D_LNI, "Removed LNI %s\n",
2249 libcfs_nid2str(ni->ni_nid));
2253 lnet_net_lock(LNET_LOCK_EX);
2257 /* shutdown down the NI and release refcount */
2259 lnet_shutdown_lndni(struct lnet_ni *ni)
2262 struct lnet_net *net = ni->ni_net;
2264 lnet_net_lock(LNET_LOCK_EX);
2266 ni->ni_state = LNET_NI_STATE_DELETING;
2268 lnet_ni_unlink_locked(ni);
2269 lnet_incr_dlc_seq();
2270 lnet_net_unlock(LNET_LOCK_EX);
2272 /* clear messages for this NI on the lazy portal */
2273 for (i = 0; i < the_lnet.ln_nportals; i++)
2274 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
2276 lnet_net_lock(LNET_LOCK_EX);
2277 lnet_clear_zombies_nis_locked(net);
2278 lnet_net_unlock(LNET_LOCK_EX);
2282 lnet_shutdown_lndnet(struct lnet_net *net)
2286 lnet_net_lock(LNET_LOCK_EX);
2288 list_del_init(&net->net_list);
2290 while (!list_empty(&net->net_ni_list)) {
2291 ni = list_entry(net->net_ni_list.next,
2292 struct lnet_ni, ni_netlist);
2293 lnet_net_unlock(LNET_LOCK_EX);
2294 lnet_shutdown_lndni(ni);
2295 lnet_net_lock(LNET_LOCK_EX);
2298 lnet_net_unlock(LNET_LOCK_EX);
2300 /* Do peer table cleanup for this net */
2301 lnet_peer_tables_cleanup(net);
2307 lnet_shutdown_lndnets(void)
2309 struct lnet_net *net;
2311 struct lnet_msg *msg, *tmp;
2313 /* NB called holding the global mutex */
2315 /* All quiet on the API front */
2316 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
2317 LASSERT(the_lnet.ln_refcount == 0);
2319 lnet_net_lock(LNET_LOCK_EX);
2320 the_lnet.ln_state = LNET_STATE_STOPPING;
2323 * move the nets to the zombie list to avoid them being
2324 * picked up for new work. LONET is also included in the
2325 * Nets that will be moved to the zombie list
2327 list_splice_init(&the_lnet.ln_nets, &the_lnet.ln_net_zombie);
2329 /* Drop the cached loopback Net. */
2330 if (the_lnet.ln_loni != NULL) {
2331 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
2332 the_lnet.ln_loni = NULL;
2334 lnet_net_unlock(LNET_LOCK_EX);
2336 /* iterate through the net zombie list and delete each net */
2337 while (!list_empty(&the_lnet.ln_net_zombie)) {
2338 net = list_entry(the_lnet.ln_net_zombie.next,
2339 struct lnet_net, net_list);
2340 lnet_shutdown_lndnet(net);
2343 spin_lock(&the_lnet.ln_msg_resend_lock);
2344 list_splice(&the_lnet.ln_msg_resend, &resend);
2345 spin_unlock(&the_lnet.ln_msg_resend_lock);
2347 list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
2348 list_del_init(&msg->msg_list);
2349 msg->msg_no_resend = true;
2350 lnet_finalize(msg, -ECANCELED);
2353 lnet_net_lock(LNET_LOCK_EX);
2354 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
2355 lnet_net_unlock(LNET_LOCK_EX);
2359 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
2362 struct lnet_tx_queue *tq;
2364 struct lnet_net *net = ni->ni_net;
2366 mutex_lock(&the_lnet.ln_lnd_mutex);
2369 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
2370 ni->ni_lnd_tunables_set = true;
2373 rc = (net->net_lnd->lnd_startup)(ni);
2375 mutex_unlock(&the_lnet.ln_lnd_mutex);
2378 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
2379 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
2384 ni->ni_state = LNET_NI_STATE_ACTIVE;
2387 /* We keep a reference on the loopback net through the loopback NI */
2388 if (net->net_lnd->lnd_type == LOLND) {
2390 LASSERT(the_lnet.ln_loni == NULL);
2391 the_lnet.ln_loni = ni;
2392 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
2393 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
2394 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
2395 ni->ni_net->net_tunables.lct_peer_timeout = 0;
2399 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
2400 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
2401 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
2402 libcfs_lnd2str(net->net_lnd->lnd_type),
2403 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
2405 /* shutdown the NI since if we get here then it must've already
2408 lnet_shutdown_lndni(ni);
2412 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
2413 tq->tq_credits_min =
2414 tq->tq_credits_max =
2415 tq->tq_credits = lnet_ni_tq_credits(ni);
2418 atomic_set(&ni->ni_tx_credits,
2419 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
2420 atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
2422 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
2423 libcfs_nid2str(ni->ni_nid),
2424 ni->ni_net->net_tunables.lct_peer_tx_credits,
2425 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
2426 ni->ni_net->net_tunables.lct_peer_rtr_credits,
2427 ni->ni_net->net_tunables.lct_peer_timeout);
2436 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
2439 struct lnet_net *net_l = NULL;
2440 LIST_HEAD(local_ni_list);
2444 const struct lnet_lnd *lnd;
2446 net->net_tunables.lct_peer_timeout;
2448 net->net_tunables.lct_max_tx_credits;
2449 int peerrtrcredits =
2450 net->net_tunables.lct_peer_rtr_credits;
2453 * make sure that this net is unique. If it isn't then
2454 * we are adding interfaces to an already existing network, and
2455 * 'net' is just a convenient way to pass in the list.
2456 * if it is unique we need to find the LND and load it if
2459 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
2460 lnd_type = LNET_NETTYP(net->net_id);
2462 mutex_lock(&the_lnet.ln_lnd_mutex);
2463 lnd = lnet_find_lnd_by_type(lnd_type);
2466 mutex_unlock(&the_lnet.ln_lnd_mutex);
2467 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
2468 mutex_lock(&the_lnet.ln_lnd_mutex);
2470 lnd = lnet_find_lnd_by_type(lnd_type);
2472 mutex_unlock(&the_lnet.ln_lnd_mutex);
2473 CERROR("Can't load LND %s, module %s, rc=%d\n",
2474 libcfs_lnd2str(lnd_type),
2475 libcfs_lnd2modname(lnd_type), rc);
2476 #ifndef HAVE_MODULE_LOADING_SUPPORT
2477 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
2478 "compiled with kernel module "
2479 "loading support.");
2488 mutex_unlock(&the_lnet.ln_lnd_mutex);
2494 * net_l: if the network being added is unique then net_l
2495 * will point to that network
2496 * if the network being added is not unique then
2497 * net_l points to the existing network.
2499 * When we enter the loop below, we'll pick NIs off he
2500 * network beign added and start them up, then add them to
2501 * a local ni list. Once we've successfully started all
2502 * the NIs then we join the local NI list (of started up
2503 * networks) with the net_l->net_ni_list, which should
2504 * point to the correct network to add the new ni list to
2506 * If any of the new NIs fail to start up, then we want to
2507 * iterate through the local ni list, which should include
2508 * any NIs which were successfully started up, and shut
2511 * After than we want to delete the network being added,
2512 * to avoid a memory leak.
2514 while (!list_empty(&net->net_ni_added)) {
2515 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
2517 list_del_init(&ni->ni_netlist);
2519 /* make sure that the the NI we're about to start
2520 * up is actually unique. if it's not fail. */
2521 if (!lnet_ni_unique_net(&net_l->net_ni_list,
2522 ni->ni_interface)) {
2527 /* adjust the pointer the parent network, just in case it
2528 * the net is a duplicate */
2531 rc = lnet_startup_lndni(ni, tun);
2537 list_add_tail(&ni->ni_netlist, &local_ni_list);
2542 lnet_net_lock(LNET_LOCK_EX);
2543 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
2544 lnet_incr_dlc_seq();
2545 lnet_net_unlock(LNET_LOCK_EX);
2547 /* if the network is not unique then we don't want to keep
2548 * it around after we're done. Free it. Otherwise add that
2549 * net to the global the_lnet.ln_nets */
2550 if (net_l != net && net_l != NULL) {
2552 * TODO - note. currently the tunables can not be updated
2558 * restore tunables after it has been overwitten by the
2561 if (peer_timeout != -1)
2562 net->net_tunables.lct_peer_timeout = peer_timeout;
2563 if (maxtxcredits != -1)
2564 net->net_tunables.lct_max_tx_credits = maxtxcredits;
2565 if (peerrtrcredits != -1)
2566 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
2568 lnet_net_lock(LNET_LOCK_EX);
2569 list_add_tail(&net->net_list, &the_lnet.ln_nets);
2570 lnet_net_unlock(LNET_LOCK_EX);
2577 * shutdown the new NIs that are being started up
2578 * free the NET being started
2580 while (!list_empty(&local_ni_list)) {
2581 ni = list_entry(local_ni_list.next, struct lnet_ni,
2584 lnet_shutdown_lndni(ni);
2594 lnet_startup_lndnets(struct list_head *netlist)
2596 struct lnet_net *net;
2601 * Change to running state before bringing up the LNDs. This
2602 * allows lnet_shutdown_lndnets() to assert that we've passed
2605 lnet_net_lock(LNET_LOCK_EX);
2606 the_lnet.ln_state = LNET_STATE_RUNNING;
2607 lnet_net_unlock(LNET_LOCK_EX);
2609 while (!list_empty(netlist)) {
2610 net = list_entry(netlist->next, struct lnet_net, net_list);
2611 list_del_init(&net->net_list);
2613 rc = lnet_startup_lndnet(net, NULL);
2623 lnet_shutdown_lndnets();
2628 static int lnet_genl_parse_list(struct sk_buff *msg,
2629 const struct ln_key_list *data[], u16 idx)
2631 const struct ln_key_list *list = data[idx];
2632 const struct ln_key_props *props;
2633 struct nlattr *node;
2639 if (!list->lkl_maxattr)
2642 props = list->lkl_list;
2646 node = nla_nest_start(msg, LN_SCALAR_ATTR_LIST);
2650 for (count = 1; count <= list->lkl_maxattr; count++) {
2651 struct nlattr *key = nla_nest_start(msg, count);
2654 nla_put_u16(msg, LN_SCALAR_ATTR_LIST_SIZE,
2657 nla_put_u16(msg, LN_SCALAR_ATTR_INDEX, count);
2658 if (props[count].lkp_values)
2659 nla_put_string(msg, LN_SCALAR_ATTR_VALUE,
2660 props[count].lkp_values);
2661 if (props[count].lkp_key_format)
2662 nla_put_u16(msg, LN_SCALAR_ATTR_KEY_FORMAT,
2663 props[count].lkp_key_format);
2664 nla_put_u16(msg, LN_SCALAR_ATTR_NLA_TYPE,
2665 props[count].lkp_data_type);
2666 if (props[count].lkp_data_type == NLA_NESTED) {
2669 rc = lnet_genl_parse_list(msg, data, ++idx);
2674 nla_nest_end(msg, key);
2677 nla_nest_end(msg, node);
2681 int lnet_genl_send_scalar_list(struct sk_buff *msg, u32 portid, u32 seq,
2682 const struct genl_family *family, int flags,
2683 u8 cmd, const struct ln_key_list *data[])
2691 hdr = genlmsg_put(msg, portid, seq, family, flags, cmd);
2693 GOTO(canceled, rc = -EMSGSIZE);
2695 rc = lnet_genl_parse_list(msg, data, 0);
2699 genlmsg_end(msg, hdr);
2702 genlmsg_cancel(msg, hdr);
2705 EXPORT_SYMBOL(lnet_genl_send_scalar_list);
2708 * Initialize LNet library.
2710 * Automatically called at module loading time. Caller has to call
2711 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
2712 * latter returned 0. It must be called exactly once.
2714 * \retval 0 on success
2715 * \retval -ve on failures.
2717 int lnet_lib_init(void)
2721 lnet_assert_wire_constants();
2723 /* refer to global cfs_cpt_table for now */
2724 the_lnet.ln_cpt_table = cfs_cpt_tab;
2725 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_tab);
2727 LASSERT(the_lnet.ln_cpt_number > 0);
2728 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
2729 /* we are under risk of consuming all lh_cookie */
2730 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
2731 "please change setting of CPT-table and retry\n",
2732 the_lnet.ln_cpt_number, LNET_CPT_MAX);
2736 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
2737 the_lnet.ln_cpt_bits++;
2739 rc = lnet_create_locks();
2741 CERROR("Can't create LNet global locks: %d\n", rc);
2745 the_lnet.ln_refcount = 0;
2746 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
2747 INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
2749 /* The hash table size is the number of bits it takes to express the set
2750 * ln_num_routes, minus 1 (better to under estimate than over so we
2751 * don't waste memory). */
2752 if (rnet_htable_size <= 0)
2753 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
2754 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
2755 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
2756 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
2757 order_base_2(rnet_htable_size) - 1);
2759 /* All LNDs apart from the LOLND are in separate modules. They
2760 * register themselves when their module loads, and unregister
2761 * themselves when their module is unloaded. */
2762 lnet_register_lnd(&the_lolnd);
2767 * Finalize LNet library.
2769 * \pre lnet_lib_init() called with success.
2770 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
2772 * As this happens at module-unload, all lnds must already be unloaded,
2773 * so they must already be unregistered.
2775 void lnet_lib_exit(void)
2779 LASSERT(the_lnet.ln_refcount == 0);
2780 lnet_unregister_lnd(&the_lolnd);
2781 for (i = 0; i < NUM_LNDS; i++)
2782 LASSERT(!the_lnet.ln_lnds[i]);
2783 lnet_destroy_locks();
2787 * Set LNet PID and start LNet interfaces, routing, and forwarding.
2789 * Users must call this function at least once before any other functions.
2790 * For each successful call there must be a corresponding call to
2791 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
2794 * The PID used by LNet may be different from the one requested.
2797 * \param requested_pid PID requested by the caller.
2799 * \return >= 0 on success, and < 0 error code on failures.
2802 LNetNIInit(lnet_pid_t requested_pid)
2804 int im_a_router = 0;
2807 struct lnet_ping_buffer *pbuf;
2808 struct lnet_handle_md ping_mdh;
2809 LIST_HEAD(net_head);
2810 struct lnet_net *net;
2812 mutex_lock(&the_lnet.ln_api_mutex);
2814 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
2816 if (the_lnet.ln_refcount > 0) {
2817 rc = the_lnet.ln_refcount++;
2818 mutex_unlock(&the_lnet.ln_api_mutex);
2822 rc = lnet_prepare(requested_pid);
2824 mutex_unlock(&the_lnet.ln_api_mutex);
2828 /* create a network for Loopback network */
2829 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
2832 goto err_empty_list;
2835 /* Add in the loopback NI */
2836 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
2838 goto err_empty_list;
2841 if (use_tcp_bonding)
2842 CWARN("use_tcp_bonding has been removed. Use Multi-Rail and Dynamic Discovery instead, see LU-13641\n");
2844 /* If LNet is being initialized via DLC it is possible
2845 * that the user requests not to load module parameters (ones which
2846 * are supported by DLC) on initialization. Therefore, make sure not
2847 * to load networks, routes and forwarding from module parameters
2848 * in this case. On cleanup in case of failure only clean up
2849 * routes if it has been loaded */
2850 if (!the_lnet.ln_nis_from_mod_params) {
2851 rc = lnet_parse_networks(&net_head, lnet_get_networks());
2853 goto err_empty_list;
2856 ni_count = lnet_startup_lndnets(&net_head);
2859 goto err_empty_list;
2862 if (!the_lnet.ln_nis_from_mod_params) {
2863 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
2865 goto err_shutdown_lndnis;
2867 rc = lnet_rtrpools_alloc(im_a_router);
2869 goto err_destroy_routes;
2872 rc = lnet_acceptor_start();
2874 goto err_destroy_routes;
2876 the_lnet.ln_refcount = 1;
2877 /* Now I may use my own API functions... */
2879 rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_count, true);
2881 goto err_acceptor_stop;
2883 lnet_ping_target_update(pbuf, ping_mdh);
2885 the_lnet.ln_mt_handler = lnet_mt_event_handler;
2887 rc = lnet_push_target_init();
2891 rc = lnet_peer_discovery_start();
2893 goto err_destroy_push_target;
2895 rc = lnet_monitor_thr_start();
2897 goto err_stop_discovery_thr;
2900 lnet_router_debugfs_init();
2902 mutex_unlock(&the_lnet.ln_api_mutex);
2904 complete_all(&the_lnet.ln_started);
2906 /* wait for all routers to start */
2907 lnet_wait_router_start();
2911 err_stop_discovery_thr:
2912 lnet_peer_discovery_stop();
2913 err_destroy_push_target:
2914 lnet_push_target_fini();
2916 lnet_ping_target_fini();
2918 the_lnet.ln_refcount = 0;
2919 lnet_acceptor_stop();
2921 if (!the_lnet.ln_nis_from_mod_params)
2922 lnet_destroy_routes();
2923 err_shutdown_lndnis:
2924 lnet_shutdown_lndnets();
2928 mutex_unlock(&the_lnet.ln_api_mutex);
2929 while (!list_empty(&net_head)) {
2930 struct lnet_net *net;
2932 net = list_entry(net_head.next, struct lnet_net, net_list);
2933 list_del_init(&net->net_list);
2938 EXPORT_SYMBOL(LNetNIInit);
2941 * Stop LNet interfaces, routing, and forwarding.
2943 * Users must call this function once for each successful call to LNetNIInit().
2944 * Once the LNetNIFini() operation has been started, the results of pending
2945 * API operations are undefined.
2947 * \return always 0 for current implementation.
2952 mutex_lock(&the_lnet.ln_api_mutex);
2954 LASSERT(the_lnet.ln_refcount > 0);
2956 if (the_lnet.ln_refcount != 1) {
2957 the_lnet.ln_refcount--;
2959 LASSERT(!the_lnet.ln_niinit_self);
2963 lnet_router_debugfs_fini();
2964 lnet_monitor_thr_stop();
2965 lnet_peer_discovery_stop();
2966 lnet_push_target_fini();
2967 lnet_ping_target_fini();
2969 /* Teardown fns that use my own API functions BEFORE here */
2970 the_lnet.ln_refcount = 0;
2972 lnet_acceptor_stop();
2973 lnet_destroy_routes();
2974 lnet_shutdown_lndnets();
2978 mutex_unlock(&the_lnet.ln_api_mutex);
2981 EXPORT_SYMBOL(LNetNIFini);
2984 * Grabs the ni data from the ni structure and fills the out
2987 * \param[in] ni network interface structure
2988 * \param[out] cfg_ni NI config information
2989 * \param[out] tun network and LND tunables
2992 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
2993 struct lnet_ioctl_config_lnd_tunables *tun,
2994 struct lnet_ioctl_element_stats *stats,
2997 size_t min_size = 0;
3000 if (!ni || !cfg_ni || !tun)
3003 if (ni->ni_interface != NULL) {
3004 strncpy(cfg_ni->lic_ni_intf,
3006 sizeof(cfg_ni->lic_ni_intf));
3009 cfg_ni->lic_nid = ni->ni_nid;
3010 cfg_ni->lic_status = lnet_ni_get_status_locked(ni);
3011 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
3013 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
3016 stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
3017 LNET_STATS_TYPE_SEND);
3018 stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
3019 LNET_STATS_TYPE_RECV);
3020 stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
3021 LNET_STATS_TYPE_DROP);
3025 * tun->lt_tun will always be present, but in order to be
3026 * backwards compatible, we need to deal with the cases when
3027 * tun->lt_tun is smaller than what the kernel has, because it
3028 * comes from an older version of a userspace program, then we'll
3029 * need to copy as much information as we have available space.
3031 min_size = tun_size - sizeof(tun->lt_cmn);
3032 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
3034 /* copy over the cpts */
3035 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
3036 ni->ni_cpts == NULL) {
3037 for (i = 0; i < ni->ni_ncpts; i++)
3038 cfg_ni->lic_cpts[i] = i;
3041 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
3042 i < LNET_MAX_SHOW_NUM_CPT;
3044 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
3046 cfg_ni->lic_ncpts = ni->ni_ncpts;
3050 * NOTE: This is a legacy function left in the code to be backwards
3051 * compatible with older userspace programs. It should eventually be
3054 * Grabs the ni data from the ni structure and fills the out
3057 * \param[in] ni network interface structure
3058 * \param[out] config config information
3061 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
3062 struct lnet_ioctl_config_data *config)
3064 struct lnet_ioctl_net_config *net_config;
3065 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
3066 size_t min_size, tunable_size = 0;
3072 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
3076 if (!ni->ni_interface)
3079 strncpy(net_config->ni_interface,
3081 sizeof(net_config->ni_interface));
3083 config->cfg_nid = ni->ni_nid;
3084 config->cfg_config_u.cfg_net.net_peer_timeout =
3085 ni->ni_net->net_tunables.lct_peer_timeout;
3086 config->cfg_config_u.cfg_net.net_max_tx_credits =
3087 ni->ni_net->net_tunables.lct_max_tx_credits;
3088 config->cfg_config_u.cfg_net.net_peer_tx_credits =
3089 ni->ni_net->net_tunables.lct_peer_tx_credits;
3090 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
3091 ni->ni_net->net_tunables.lct_peer_rtr_credits;
3093 net_config->ni_status = lnet_ni_get_status_locked(ni);
3096 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
3098 for (i = 0; i < num_cpts; i++)
3099 net_config->ni_cpts[i] = ni->ni_cpts[i];
3101 config->cfg_ncpts = num_cpts;
3105 * See if user land tools sent in a newer and larger version
3106 * of struct lnet_tunables than what the kernel uses.
3108 min_size = sizeof(*config) + sizeof(*net_config);
3110 if (config->cfg_hdr.ioc_len > min_size)
3111 tunable_size = config->cfg_hdr.ioc_len - min_size;
3113 /* Don't copy too much data to user space */
3114 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
3115 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
3117 if (lnd_cfg && min_size) {
3118 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
3119 config->cfg_config_u.cfg_net.net_interface_count = 1;
3121 /* Tell user land that kernel side has less data */
3122 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
3123 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
3124 config->cfg_hdr.ioc_len -= min_size;
3130 lnet_get_ni_idx_locked(int idx)
3133 struct lnet_net *net;
3135 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3136 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3145 int lnet_get_net_healthv_locked(struct lnet_net *net)
3148 int best_healthv = 0;
3149 int healthv, ni_fatal;
3151 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3152 healthv = atomic_read(&ni->ni_healthv);
3153 ni_fatal = atomic_read(&ni->ni_fatal_error_on);
3154 if (!ni_fatal && healthv > best_healthv)
3155 best_healthv = healthv;
3158 return best_healthv;
3162 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
3165 struct lnet_net *net = mynet;
3168 * It is possible that the net has been cleaned out while there is
3169 * a message being sent. This function accessed the net without
3170 * checking if the list is empty
3174 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
3176 if (list_empty(&net->net_ni_list))
3178 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3184 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
3185 /* if you reached the end of the ni list and the net is
3186 * specified, then there are no more nis in that net */
3190 /* we reached the end of this net ni list. move to the
3192 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
3193 /* no more nets and no more NIs. */
3196 /* get the next net */
3197 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
3199 if (list_empty(&net->net_ni_list))
3201 /* get the ni on it */
3202 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
3208 if (list_empty(&prev->ni_netlist))
3211 /* there are more nis left */
3212 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
3218 lnet_get_net_config(struct lnet_ioctl_config_data *config)
3223 int idx = config->cfg_count;
3225 cpt = lnet_net_lock_current();
3227 ni = lnet_get_ni_idx_locked(idx);
3232 lnet_fill_ni_info_legacy(ni, config);
3236 lnet_net_unlock(cpt);
3241 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
3242 struct lnet_ioctl_config_lnd_tunables *tun,
3243 struct lnet_ioctl_element_stats *stats,
3250 if (!cfg_ni || !tun || !stats)
3253 cpt = lnet_net_lock_current();
3255 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
3260 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
3264 lnet_net_unlock(cpt);
3268 int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
3277 cpt = lnet_net_lock_current();
3279 ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
3282 lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
3286 lnet_net_unlock(cpt);
3291 static int lnet_add_net_common(struct lnet_net *net,
3292 struct lnet_ioctl_config_lnd_tunables *tun)
3294 struct lnet_handle_md ping_mdh;
3295 struct lnet_ping_buffer *pbuf;
3296 struct lnet_remotenet *rnet;
3302 lnet_net_lock(LNET_LOCK_EX);
3303 rnet = lnet_find_rnet_locked(net->net_id);
3304 lnet_net_unlock(LNET_LOCK_EX);
3306 * make sure that the net added doesn't invalidate the current
3307 * configuration LNet is keeping
3310 CERROR("Adding net %s will invalidate routing configuration\n",
3311 libcfs_net2str(net->net_id));
3317 * make sure you calculate the correct number of slots in the ping
3318 * buffer. Since the ping info is a flattened list of all the NIs,
3319 * we should allocate enough slots to accomodate the number of NIs
3320 * which will be added.
3322 * since ni hasn't been configured yet, use
3323 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
3325 net_ni_count = lnet_get_net_ni_count_pre(net);
3327 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3328 net_ni_count + lnet_get_ni_count(),
3336 memcpy(&net->net_tunables,
3337 &tun->lt_cmn, sizeof(net->net_tunables));
3339 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
3341 net_id = net->net_id;
3343 rc = lnet_startup_lndnet(net,
3344 (tun) ? &tun->lt_tun : NULL);
3348 lnet_net_lock(LNET_LOCK_EX);
3349 net = lnet_get_net_locked(net_id);
3352 /* apply the UDSPs */
3353 rc = lnet_udsp_apply_policies_on_net(net);
3355 CERROR("Failed to apply UDSPs on local net %s\n",
3356 libcfs_net2str(net->net_id));
3358 /* At this point we lost track of which NI was just added, so we
3359 * just re-apply the policies on all of the NIs on this net
3361 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3362 rc = lnet_udsp_apply_policies_on_ni(ni);
3364 CERROR("Failed to apply UDSPs on ni %s\n",
3365 libcfs_nid2str(ni->ni_nid));
3367 lnet_net_unlock(LNET_LOCK_EX);
3370 * Start the acceptor thread if this is the first network
3371 * being added that requires the thread.
3373 if (net->net_lnd->lnd_accept) {
3374 rc = lnet_acceptor_start();
3376 /* shutdown the net that we just started */
3377 CERROR("Failed to start up acceptor thread\n");
3378 lnet_shutdown_lndnet(net);
3383 lnet_net_lock(LNET_LOCK_EX);
3384 lnet_peer_net_added(net);
3385 lnet_net_unlock(LNET_LOCK_EX);
3387 lnet_ping_target_update(pbuf, ping_mdh);
3392 lnet_ping_md_unlink(pbuf, &ping_mdh);
3393 lnet_ping_buffer_decref(pbuf);
3398 lnet_set_tune_defaults(struct lnet_ioctl_config_lnd_tunables *tun)
3401 if (!tun->lt_cmn.lct_peer_timeout)
3402 tun->lt_cmn.lct_peer_timeout = DEFAULT_PEER_TIMEOUT;
3403 if (!tun->lt_cmn.lct_peer_tx_credits)
3404 tun->lt_cmn.lct_peer_tx_credits = DEFAULT_PEER_CREDITS;
3405 if (!tun->lt_cmn.lct_max_tx_credits)
3406 tun->lt_cmn.lct_max_tx_credits = DEFAULT_CREDITS;
3410 static int lnet_handle_legacy_ip2nets(char *ip2nets,
3411 struct lnet_ioctl_config_lnd_tunables *tun)
3413 struct lnet_net *net;
3416 LIST_HEAD(net_head);
3418 rc = lnet_parse_ip2nets(&nets, ip2nets);
3422 rc = lnet_parse_networks(&net_head, nets);
3426 lnet_set_tune_defaults(tun);
3428 mutex_lock(&the_lnet.ln_api_mutex);
3429 while (!list_empty(&net_head)) {
3430 net = list_entry(net_head.next, struct lnet_net, net_list);
3431 list_del_init(&net->net_list);
3432 rc = lnet_add_net_common(net, tun);
3438 mutex_unlock(&the_lnet.ln_api_mutex);
3440 while (!list_empty(&net_head)) {
3441 net = list_entry(net_head.next, struct lnet_net, net_list);
3442 list_del_init(&net->net_list);
3448 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
3450 struct lnet_net *net;
3452 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3454 __u32 net_id, lnd_type;
3456 /* get the tunables if they are available */
3457 if (conf->lic_cfg_hdr.ioc_len >=
3458 sizeof(*conf) + sizeof(*tun))
3459 tun = (struct lnet_ioctl_config_lnd_tunables *)
3462 /* handle legacy ip2nets from DLC */
3463 if (conf->lic_legacy_ip2nets[0] != '\0')
3464 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
3467 net_id = LNET_NIDNET(conf->lic_nid);
3468 lnd_type = LNET_NETTYP(net_id);
3470 if (!libcfs_isknown_lnd(lnd_type)) {
3471 CERROR("No valid net and lnd information provided\n");
3475 net = lnet_net_alloc(net_id, NULL);
3479 for (i = 0; i < conf->lic_ncpts; i++) {
3480 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
3484 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
3489 lnet_set_tune_defaults(tun);
3491 mutex_lock(&the_lnet.ln_api_mutex);
3493 rc = lnet_add_net_common(net, tun);
3495 mutex_unlock(&the_lnet.ln_api_mutex);
3500 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
3502 struct lnet_net *net;
3504 __u32 net_id = LNET_NIDNET(conf->lic_nid);
3505 struct lnet_ping_buffer *pbuf;
3506 struct lnet_handle_md ping_mdh;
3511 /* don't allow userspace to shutdown the LOLND */
3512 if (LNET_NETTYP(net_id) == LOLND)
3515 mutex_lock(&the_lnet.ln_api_mutex);
3519 net = lnet_get_net_locked(net_id);
3521 CERROR("net %s not found\n",
3522 libcfs_net2str(net_id));
3527 addr = LNET_NIDADDR(conf->lic_nid);
3529 /* remove the entire net */
3530 net_count = lnet_get_net_ni_count_locked(net);
3534 /* create and link a new ping info, before removing the old one */
3535 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3536 lnet_get_ni_count() - net_count,
3539 goto unlock_api_mutex;
3541 lnet_shutdown_lndnet(net);
3543 lnet_acceptor_stop();
3545 lnet_ping_target_update(pbuf, ping_mdh);
3547 goto unlock_api_mutex;
3550 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
3552 CERROR("nid %s not found\n",
3553 libcfs_nid2str(conf->lic_nid));
3558 net_count = lnet_get_net_ni_count_locked(net);
3562 /* create and link a new ping info, before removing the old one */
3563 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3564 lnet_get_ni_count() - 1, false);
3566 goto unlock_api_mutex;
3568 lnet_shutdown_lndni(ni);
3570 lnet_acceptor_stop();
3572 lnet_ping_target_update(pbuf, ping_mdh);
3574 /* check if the net is empty and remove it if it is */
3576 lnet_shutdown_lndnet(net);
3578 goto unlock_api_mutex;
3583 mutex_unlock(&the_lnet.ln_api_mutex);
3589 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
3590 * They are only expected to be called for unique networks.
3591 * That can be as a result of older DLC library
3592 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
3595 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
3597 struct lnet_net *net;
3598 LIST_HEAD(net_head);
3600 struct lnet_ioctl_config_lnd_tunables tun;
3601 const char *nets = conf->cfg_config_u.cfg_net.net_intf;
3603 /* Create a net/ni structures for the network string */
3604 rc = lnet_parse_networks(&net_head, nets);
3606 return rc == 0 ? -EINVAL : rc;
3608 mutex_lock(&the_lnet.ln_api_mutex);
3611 rc = -EINVAL; /* only add one network per call */
3612 goto out_unlock_clean;
3615 net = list_entry(net_head.next, struct lnet_net, net_list);
3616 list_del_init(&net->net_list);
3618 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
3620 memset(&tun, 0, sizeof(tun));
3622 tun.lt_cmn.lct_peer_timeout =
3623 (!conf->cfg_config_u.cfg_net.net_peer_timeout) ? DEFAULT_PEER_TIMEOUT :
3624 conf->cfg_config_u.cfg_net.net_peer_timeout;
3625 tun.lt_cmn.lct_peer_tx_credits =
3626 (!conf->cfg_config_u.cfg_net.net_peer_tx_credits) ? DEFAULT_PEER_CREDITS :
3627 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
3628 tun.lt_cmn.lct_peer_rtr_credits =
3629 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
3630 tun.lt_cmn.lct_max_tx_credits =
3631 (!conf->cfg_config_u.cfg_net.net_max_tx_credits) ? DEFAULT_CREDITS :
3632 conf->cfg_config_u.cfg_net.net_max_tx_credits;
3634 rc = lnet_add_net_common(net, &tun);
3637 mutex_unlock(&the_lnet.ln_api_mutex);
3638 while (!list_empty(&net_head)) {
3639 /* net_head list is empty in success case */
3640 net = list_entry(net_head.next, struct lnet_net, net_list);
3641 list_del_init(&net->net_list);
3648 lnet_dyn_del_net(__u32 net_id)
3650 struct lnet_net *net;
3651 struct lnet_ping_buffer *pbuf;
3652 struct lnet_handle_md ping_mdh;
3656 /* don't allow userspace to shutdown the LOLND */
3657 if (LNET_NETTYP(net_id) == LOLND)
3660 mutex_lock(&the_lnet.ln_api_mutex);
3664 net = lnet_get_net_locked(net_id);
3671 net_ni_count = lnet_get_net_ni_count_locked(net);
3675 /* create and link a new ping info, before removing the old one */
3676 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3677 lnet_get_ni_count() - net_ni_count, false);
3681 lnet_shutdown_lndnet(net);
3683 lnet_acceptor_stop();
3685 lnet_ping_target_update(pbuf, ping_mdh);
3688 mutex_unlock(&the_lnet.ln_api_mutex);
3693 void lnet_incr_dlc_seq(void)
3695 atomic_inc(&lnet_dlc_seq_no);
3698 __u32 lnet_get_dlc_seq_locked(void)
3700 return atomic_read(&lnet_dlc_seq_no);
3704 lnet_ni_set_healthv(lnet_nid_t nid, int value, bool all)
3706 struct lnet_net *net;
3709 lnet_net_lock(LNET_LOCK_EX);
3710 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3711 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3712 if (ni->ni_nid == nid || all) {
3713 atomic_set(&ni->ni_healthv, value);
3714 if (list_empty(&ni->ni_recovery) &&
3715 value < LNET_MAX_HEALTH_VALUE) {
3716 CERROR("manually adding local NI %s to recovery\n",
3717 libcfs_nid2str(ni->ni_nid));
3718 list_add_tail(&ni->ni_recovery,
3719 &the_lnet.ln_mt_localNIRecovq);
3720 lnet_ni_addref_locked(ni, 0);
3723 lnet_net_unlock(LNET_LOCK_EX);
3729 lnet_net_unlock(LNET_LOCK_EX);
3733 lnet_ni_set_conns_per_peer(lnet_nid_t nid, int value, bool all)
3735 struct lnet_net *net;
3738 lnet_net_lock(LNET_LOCK_EX);
3739 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3740 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3741 if (ni->ni_nid != nid && !all)
3743 if (LNET_NETTYP(net->net_id) == SOCKLND)
3744 ni->ni_lnd_tunables.lnd_tun_u.lnd_sock.lnd_conns_per_peer = value;
3745 else if (LNET_NETTYP(net->net_id) == O2IBLND)
3746 ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib.lnd_conns_per_peer = value;
3748 lnet_net_unlock(LNET_LOCK_EX);
3753 lnet_net_unlock(LNET_LOCK_EX);
3757 lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
3761 lnet_nid_t nid = stats->hlni_nid;
3763 cpt = lnet_net_lock_current();
3764 ni = lnet_nid2ni_locked(nid, cpt);
3771 stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
3772 stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
3773 stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
3774 stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
3775 stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
3776 stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
3777 stats->hlni_fatal_error = atomic_read(&ni->ni_fatal_error_on);
3778 stats->hlni_health_value = atomic_read(&ni->ni_healthv);
3779 stats->hlni_ping_count = ni->ni_ping_count;
3780 stats->hlni_next_ping = ni->ni_next_ping;
3783 lnet_net_unlock(cpt);
3789 lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3794 lnet_net_lock(LNET_LOCK_EX);
3795 list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
3796 list->rlst_nid_array[i] = ni->ni_nid;
3798 if (i >= LNET_MAX_SHOW_NUM_NID)
3801 lnet_net_unlock(LNET_LOCK_EX);
3802 list->rlst_num_nids = i;
3808 lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3810 struct lnet_peer_ni *lpni;
3813 lnet_net_lock(LNET_LOCK_EX);
3814 list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
3815 list->rlst_nid_array[i] = lpni->lpni_nid;
3817 if (i >= LNET_MAX_SHOW_NUM_NID)
3820 lnet_net_unlock(LNET_LOCK_EX);
3821 list->rlst_num_nids = i;
3827 * LNet ioctl handler.
3831 LNetCtl(unsigned int cmd, void *arg)
3833 struct libcfs_ioctl_data *data = arg;
3834 struct lnet_ioctl_config_data *config;
3835 struct lnet_process_id id = {0};
3839 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
3840 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
3843 case IOC_LIBCFS_GET_NI:
3844 rc = LNetGetId(data->ioc_count, &id);
3845 data->ioc_nid = id.nid;
3848 case IOC_LIBCFS_FAIL_NID:
3849 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
3851 case IOC_LIBCFS_ADD_ROUTE: {
3852 /* default router sensitivity to 1 */
3853 unsigned int sensitivity = 1;
3856 if (config->cfg_hdr.ioc_len < sizeof(*config))
3859 if (config->cfg_config_u.cfg_route.rtr_sensitivity) {
3861 config->cfg_config_u.cfg_route.rtr_sensitivity;
3864 mutex_lock(&the_lnet.ln_api_mutex);
3865 rc = lnet_add_route(config->cfg_net,
3866 config->cfg_config_u.cfg_route.rtr_hop,
3868 config->cfg_config_u.cfg_route.
3869 rtr_priority, sensitivity);
3870 mutex_unlock(&the_lnet.ln_api_mutex);
3874 case IOC_LIBCFS_DEL_ROUTE:
3877 if (config->cfg_hdr.ioc_len < sizeof(*config))
3880 mutex_lock(&the_lnet.ln_api_mutex);
3881 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
3882 mutex_unlock(&the_lnet.ln_api_mutex);
3885 case IOC_LIBCFS_GET_ROUTE:
3888 if (config->cfg_hdr.ioc_len < sizeof(*config))
3891 mutex_lock(&the_lnet.ln_api_mutex);
3892 rc = lnet_get_route(config->cfg_count,
3894 &config->cfg_config_u.cfg_route.rtr_hop,
3896 &config->cfg_config_u.cfg_route.rtr_flags,
3897 &config->cfg_config_u.cfg_route.
3899 &config->cfg_config_u.cfg_route.
3901 mutex_unlock(&the_lnet.ln_api_mutex);
3904 case IOC_LIBCFS_GET_LOCAL_NI: {
3905 struct lnet_ioctl_config_ni *cfg_ni;
3906 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3907 struct lnet_ioctl_element_stats *stats;
3912 /* get the tunables if they are available */
3913 if (cfg_ni->lic_cfg_hdr.ioc_len <
3914 sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
3917 stats = (struct lnet_ioctl_element_stats *)
3919 tun = (struct lnet_ioctl_config_lnd_tunables *)
3920 (cfg_ni->lic_bulk + sizeof(*stats));
3922 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
3925 mutex_lock(&the_lnet.ln_api_mutex);
3926 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
3927 mutex_unlock(&the_lnet.ln_api_mutex);
3931 case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
3932 struct lnet_ioctl_element_msg_stats *msg_stats = arg;
3934 if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
3937 mutex_lock(&the_lnet.ln_api_mutex);
3938 rc = lnet_get_ni_stats(msg_stats);
3939 mutex_unlock(&the_lnet.ln_api_mutex);
3944 case IOC_LIBCFS_GET_NET: {
3945 size_t total = sizeof(*config) +
3946 sizeof(struct lnet_ioctl_net_config);
3949 if (config->cfg_hdr.ioc_len < total)
3952 mutex_lock(&the_lnet.ln_api_mutex);
3953 rc = lnet_get_net_config(config);
3954 mutex_unlock(&the_lnet.ln_api_mutex);
3958 case IOC_LIBCFS_GET_LNET_STATS:
3960 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
3962 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
3965 mutex_lock(&the_lnet.ln_api_mutex);
3966 rc = lnet_counters_get(&lnet_stats->st_cntrs);
3967 mutex_unlock(&the_lnet.ln_api_mutex);
3971 case IOC_LIBCFS_RESET_LNET_STATS:
3973 mutex_lock(&the_lnet.ln_api_mutex);
3974 lnet_counters_reset();
3975 mutex_unlock(&the_lnet.ln_api_mutex);
3979 case IOC_LIBCFS_CONFIG_RTR:
3982 if (config->cfg_hdr.ioc_len < sizeof(*config))
3985 mutex_lock(&the_lnet.ln_api_mutex);
3986 if (config->cfg_config_u.cfg_buffers.buf_enable) {
3987 rc = lnet_rtrpools_enable();
3988 mutex_unlock(&the_lnet.ln_api_mutex);
3991 lnet_rtrpools_disable();
3992 mutex_unlock(&the_lnet.ln_api_mutex);
3995 case IOC_LIBCFS_ADD_BUF:
3998 if (config->cfg_hdr.ioc_len < sizeof(*config))
4001 mutex_lock(&the_lnet.ln_api_mutex);
4002 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
4004 config->cfg_config_u.cfg_buffers.
4006 config->cfg_config_u.cfg_buffers.
4008 mutex_unlock(&the_lnet.ln_api_mutex);
4011 case IOC_LIBCFS_SET_NUMA_RANGE: {
4012 struct lnet_ioctl_set_value *numa;
4014 if (numa->sv_hdr.ioc_len != sizeof(*numa))
4016 lnet_net_lock(LNET_LOCK_EX);
4017 lnet_numa_range = numa->sv_value;
4018 lnet_net_unlock(LNET_LOCK_EX);
4022 case IOC_LIBCFS_GET_NUMA_RANGE: {
4023 struct lnet_ioctl_set_value *numa;
4025 if (numa->sv_hdr.ioc_len != sizeof(*numa))
4027 numa->sv_value = lnet_numa_range;
4031 case IOC_LIBCFS_GET_BUF: {
4032 struct lnet_ioctl_pool_cfg *pool_cfg;
4033 size_t total = sizeof(*config) + sizeof(*pool_cfg);
4037 if (config->cfg_hdr.ioc_len < total)
4040 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
4042 mutex_lock(&the_lnet.ln_api_mutex);
4043 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
4044 mutex_unlock(&the_lnet.ln_api_mutex);
4048 case IOC_LIBCFS_GET_LOCAL_HSTATS: {
4049 struct lnet_ioctl_local_ni_hstats *stats = arg;
4051 if (stats->hlni_hdr.ioc_len < sizeof(*stats))
4054 mutex_lock(&the_lnet.ln_api_mutex);
4055 rc = lnet_get_local_ni_hstats(stats);
4056 mutex_unlock(&the_lnet.ln_api_mutex);
4061 case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
4062 struct lnet_ioctl_recovery_list *list = arg;
4063 if (list->rlst_hdr.ioc_len < sizeof(*list))
4066 mutex_lock(&the_lnet.ln_api_mutex);
4067 if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
4068 rc = lnet_get_local_ni_recovery_list(list);
4070 rc = lnet_get_peer_ni_recovery_list(list);
4071 mutex_unlock(&the_lnet.ln_api_mutex);
4075 case IOC_LIBCFS_ADD_PEER_NI: {
4076 struct lnet_ioctl_peer_cfg *cfg = arg;
4078 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4081 mutex_lock(&the_lnet.ln_api_mutex);
4082 rc = lnet_add_peer_ni(cfg->prcfg_prim_nid,
4084 cfg->prcfg_mr, false);
4085 mutex_unlock(&the_lnet.ln_api_mutex);
4089 case IOC_LIBCFS_DEL_PEER_NI: {
4090 struct lnet_ioctl_peer_cfg *cfg = arg;
4092 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4095 mutex_lock(&the_lnet.ln_api_mutex);
4096 rc = lnet_del_peer_ni(cfg->prcfg_prim_nid,
4097 cfg->prcfg_cfg_nid);
4098 mutex_unlock(&the_lnet.ln_api_mutex);
4102 case IOC_LIBCFS_GET_PEER_INFO: {
4103 struct lnet_ioctl_peer *peer_info = arg;
4105 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
4108 mutex_lock(&the_lnet.ln_api_mutex);
4109 rc = lnet_get_peer_ni_info(
4110 peer_info->pr_count,
4112 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
4113 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
4114 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
4115 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
4116 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
4117 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
4118 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
4119 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
4120 mutex_unlock(&the_lnet.ln_api_mutex);
4124 case IOC_LIBCFS_GET_PEER_NI: {
4125 struct lnet_ioctl_peer_cfg *cfg = arg;
4127 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4130 mutex_lock(&the_lnet.ln_api_mutex);
4131 rc = lnet_get_peer_info(cfg,
4132 (void __user *)cfg->prcfg_bulk);
4133 mutex_unlock(&the_lnet.ln_api_mutex);
4137 case IOC_LIBCFS_GET_PEER_LIST: {
4138 struct lnet_ioctl_peer_cfg *cfg = arg;
4140 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
4143 mutex_lock(&the_lnet.ln_api_mutex);
4144 rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
4145 (struct lnet_process_id __user *)cfg->prcfg_bulk);
4146 mutex_unlock(&the_lnet.ln_api_mutex);
4150 case IOC_LIBCFS_SET_HEALHV: {
4151 struct lnet_ioctl_reset_health_cfg *cfg = arg;
4153 if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
4155 if (cfg->rh_value < 0 ||
4156 cfg->rh_value > LNET_MAX_HEALTH_VALUE)
4157 value = LNET_MAX_HEALTH_VALUE;
4159 value = cfg->rh_value;
4160 CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
4161 value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
4162 "local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
4163 mutex_lock(&the_lnet.ln_api_mutex);
4164 if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI)
4165 lnet_ni_set_healthv(cfg->rh_nid, value,
4168 lnet_peer_ni_set_healthv(cfg->rh_nid, value,
4170 mutex_unlock(&the_lnet.ln_api_mutex);
4174 case IOC_LIBCFS_SET_CONNS_PER_PEER: {
4175 struct lnet_ioctl_reset_conns_per_peer_cfg *cfg = arg;
4178 if (cfg->rcpp_hdr.ioc_len < sizeof(*cfg))
4180 if (cfg->rcpp_value < 0)
4183 value = cfg->rcpp_value;
4185 "Setting conns_per_peer to %d for %s. all = %d\n",
4186 value, libcfs_nid2str(cfg->rcpp_nid), cfg->rcpp_all);
4187 mutex_lock(&the_lnet.ln_api_mutex);
4188 lnet_ni_set_conns_per_peer(cfg->rcpp_nid, value, cfg->rcpp_all);
4189 mutex_unlock(&the_lnet.ln_api_mutex);
4193 case IOC_LIBCFS_NOTIFY_ROUTER: {
4194 time64_t deadline = ktime_get_real_seconds() - data->ioc_u64[0];
4196 /* The deadline passed in by the user should be some time in
4197 * seconds in the future since the UNIX epoch. We have to map
4198 * that deadline to the wall clock.
4200 deadline += ktime_get_seconds();
4201 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, false,
4205 case IOC_LIBCFS_LNET_DIST:
4206 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
4207 if (rc < 0 && rc != -EHOSTUNREACH)
4210 data->ioc_u32[0] = rc;
4213 case IOC_LIBCFS_TESTPROTOCOMPAT:
4214 the_lnet.ln_testprotocompat = data->ioc_flags;
4217 case IOC_LIBCFS_LNET_FAULT:
4218 return lnet_fault_ctl(data->ioc_flags, data);
4220 case IOC_LIBCFS_PING: {
4221 signed long timeout;
4223 id.nid = data->ioc_nid;
4224 id.pid = data->ioc_u32[0];
4226 /* If timeout is negative then set default of 3 minutes */
4227 if (((s32)data->ioc_u32[1] <= 0) ||
4228 data->ioc_u32[1] > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
4229 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
4231 timeout = nsecs_to_jiffies(data->ioc_u32[1] * NSEC_PER_MSEC);
4233 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
4234 data->ioc_plen1 / sizeof(struct lnet_process_id));
4239 data->ioc_count = rc;
4243 case IOC_LIBCFS_PING_PEER: {
4244 struct lnet_ioctl_ping_data *ping = arg;
4245 struct lnet_peer *lp;
4246 signed long timeout;
4248 /* If timeout is negative then set default of 3 minutes */
4249 if (((s32)ping->op_param) <= 0 ||
4250 ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
4251 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
4253 timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
4255 rc = lnet_ping(ping->ping_id, timeout,
4261 mutex_lock(&the_lnet.ln_api_mutex);
4262 lp = lnet_find_peer(ping->ping_id.nid);
4264 ping->ping_id.nid = lp->lp_primary_nid;
4265 ping->mr_info = lnet_peer_is_multi_rail(lp);
4266 lnet_peer_decref_locked(lp);
4268 mutex_unlock(&the_lnet.ln_api_mutex);
4270 ping->ping_count = rc;
4274 case IOC_LIBCFS_DISCOVER: {
4275 struct lnet_ioctl_ping_data *discover = arg;
4276 struct lnet_peer *lp;
4278 rc = lnet_discover(discover->ping_id, discover->op_param,
4280 discover->ping_count);
4284 mutex_lock(&the_lnet.ln_api_mutex);
4285 lp = lnet_find_peer(discover->ping_id.nid);
4287 discover->ping_id.nid = lp->lp_primary_nid;
4288 discover->mr_info = lnet_peer_is_multi_rail(lp);
4289 lnet_peer_decref_locked(lp);
4291 mutex_unlock(&the_lnet.ln_api_mutex);
4293 discover->ping_count = rc;
4297 case IOC_LIBCFS_ADD_UDSP: {
4298 struct lnet_ioctl_udsp *ioc_udsp = arg;
4299 __u32 bulk_size = ioc_udsp->iou_hdr.ioc_len;
4301 mutex_lock(&the_lnet.ln_api_mutex);
4302 rc = lnet_udsp_demarshal_add(arg, bulk_size);
4304 rc = lnet_udsp_apply_policies(NULL, false);
4305 CDEBUG(D_NET, "policy application returned %d\n", rc);
4308 mutex_unlock(&the_lnet.ln_api_mutex);
4313 case IOC_LIBCFS_DEL_UDSP: {
4314 struct lnet_ioctl_udsp *ioc_udsp = arg;
4315 int idx = ioc_udsp->iou_idx;
4317 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4320 mutex_lock(&the_lnet.ln_api_mutex);
4321 rc = lnet_udsp_del_policy(idx);
4323 rc = lnet_udsp_apply_policies(NULL, false);
4324 CDEBUG(D_NET, "policy re-application returned %d\n",
4328 mutex_unlock(&the_lnet.ln_api_mutex);
4333 case IOC_LIBCFS_GET_UDSP_SIZE: {
4334 struct lnet_ioctl_udsp *ioc_udsp = arg;
4335 struct lnet_udsp *udsp;
4337 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4342 mutex_lock(&the_lnet.ln_api_mutex);
4343 udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
4347 /* coming in iou_idx will hold the idx of the udsp
4348 * to get the size of. going out the iou_idx will
4349 * hold the size of the UDSP found at the passed
4352 ioc_udsp->iou_idx = lnet_get_udsp_size(udsp);
4353 if (ioc_udsp->iou_idx < 0)
4356 mutex_unlock(&the_lnet.ln_api_mutex);
4361 case IOC_LIBCFS_GET_UDSP: {
4362 struct lnet_ioctl_udsp *ioc_udsp = arg;
4363 struct lnet_udsp *udsp;
4365 if (ioc_udsp->iou_hdr.ioc_len < sizeof(*ioc_udsp))
4370 mutex_lock(&the_lnet.ln_api_mutex);
4371 udsp = lnet_udsp_get_policy(ioc_udsp->iou_idx);
4375 rc = lnet_udsp_marshal(udsp, ioc_udsp);
4376 mutex_unlock(&the_lnet.ln_api_mutex);
4381 case IOC_LIBCFS_GET_CONST_UDSP_INFO: {
4382 struct lnet_ioctl_construct_udsp_info *info = arg;
4384 if (info->cud_hdr.ioc_len < sizeof(*info))
4387 CDEBUG(D_NET, "GET_UDSP_INFO for %s\n",
4388 libcfs_nid2str(info->cud_nid));
4390 mutex_lock(&the_lnet.ln_api_mutex);
4391 lnet_udsp_get_construct_info(info);
4392 mutex_unlock(&the_lnet.ln_api_mutex);
4398 ni = lnet_net2ni_addref(data->ioc_net);
4402 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
4405 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
4412 EXPORT_SYMBOL(LNetCtl);
4414 void LNetDebugPeer(struct lnet_process_id id)
4416 lnet_debug_peer(id.nid);
4418 EXPORT_SYMBOL(LNetDebugPeer);
4421 * Determine if the specified peer \a nid is on the local node.
4423 * \param nid peer nid to check
4425 * \retval true If peer NID is on the local node.
4426 * \retval false If peer NID is not on the local node.
4428 bool LNetIsPeerLocal(lnet_nid_t nid)
4430 struct lnet_net *net;
4434 cpt = lnet_net_lock_current();
4435 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4436 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4437 if (ni->ni_nid == nid) {
4438 lnet_net_unlock(cpt);
4443 lnet_net_unlock(cpt);
4447 EXPORT_SYMBOL(LNetIsPeerLocal);
4450 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
4451 * Note that all interfaces share a same PID, as requested by LNetNIInit().
4453 * \param index Index of the interface to look up.
4454 * \param id On successful return, this location will hold the
4455 * struct lnet_process_id ID of the interface.
4457 * \retval 0 If an interface exists at \a index.
4458 * \retval -ENOENT If no interface has been found.
4461 LNetGetId(unsigned int index, struct lnet_process_id *id)
4464 struct lnet_net *net;
4468 LASSERT(the_lnet.ln_refcount > 0);
4470 cpt = lnet_net_lock_current();
4472 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4473 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4477 id->nid = ni->ni_nid;
4478 id->pid = the_lnet.ln_pid;
4484 lnet_net_unlock(cpt);
4487 EXPORT_SYMBOL(LNetGetId);
4492 struct lnet_handle_md mdh;
4493 struct completion completion;
4497 lnet_ping_event_handler(struct lnet_event *event)
4499 struct ping_data *pd = event->md_user_ptr;
4501 CDEBUG(D_NET, "ping event (%d %d)%s\n",
4502 event->type, event->status,
4503 event->unlinked ? " unlinked" : "");
4505 if (event->status) {
4507 pd->rc = event->status;
4508 } else if (event->type == LNET_EVENT_REPLY) {
4510 pd->rc = event->mlength;
4512 if (event->unlinked)
4513 complete(&pd->completion);
4516 static int lnet_ping(struct lnet_process_id id, signed long timeout,
4517 struct lnet_process_id __user *ids, int n_ids)
4519 struct lnet_md md = { NULL };
4520 struct ping_data pd = { 0 };
4521 struct lnet_ping_buffer *pbuf;
4522 struct lnet_process_id tmpid;
4528 /* n_ids limit is arbitrary */
4529 if (n_ids <= 0 || id.nid == LNET_NID_ANY)
4533 * if the user buffer has more space than the lnet_interfaces_max
4534 * then only fill it up to lnet_interfaces_max
4536 if (n_ids > lnet_interfaces_max)
4537 n_ids = lnet_interfaces_max;
4539 if (id.pid == LNET_PID_ANY)
4540 id.pid = LNET_PID_LUSTRE;
4542 pbuf = lnet_ping_buffer_alloc(n_ids, GFP_NOFS);
4546 /* initialize md content */
4547 md.start = &pbuf->pb_info;
4548 md.length = LNET_PING_INFO_SIZE(n_ids);
4549 md.threshold = 2; /* GET/REPLY */
4551 md.options = LNET_MD_TRUNCATE;
4553 md.handler = lnet_ping_event_handler;
4555 init_completion(&pd.completion);
4557 rc = LNetMDBind(&md, LNET_UNLINK, &pd.mdh);
4559 CERROR("Can't bind MD: %d\n", rc);
4560 goto fail_ping_buffer_decref;
4563 rc = LNetGet(LNET_NID_ANY, pd.mdh, id,
4564 LNET_RESERVED_PORTAL,
4565 LNET_PROTO_PING_MATCHBITS, 0, false);
4568 /* Don't CERROR; this could be deliberate! */
4569 rc2 = LNetMDUnlink(pd.mdh);
4572 /* NB must wait for the UNLINK event below... */
4575 if (wait_for_completion_timeout(&pd.completion, timeout) == 0) {
4576 /* Ensure completion in finite time... */
4577 LNetMDUnlink(pd.mdh);
4578 wait_for_completion(&pd.completion);
4582 goto fail_ping_buffer_decref;
4586 LASSERT(nob >= 0 && nob <= LNET_PING_INFO_SIZE(n_ids));
4588 rc = -EPROTO; /* if I can't parse... */
4591 CERROR("%s: ping info too short %d\n",
4592 libcfs_id2str(id), nob);
4593 goto fail_ping_buffer_decref;
4596 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
4597 lnet_swap_pinginfo(pbuf);
4598 } else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
4599 CERROR("%s: Unexpected magic %08x\n",
4600 libcfs_id2str(id), pbuf->pb_info.pi_magic);
4601 goto fail_ping_buffer_decref;
4604 if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
4605 CERROR("%s: ping w/o NI status: 0x%x\n",
4606 libcfs_id2str(id), pbuf->pb_info.pi_features);
4607 goto fail_ping_buffer_decref;
4610 if (nob < LNET_PING_INFO_SIZE(0)) {
4611 CERROR("%s: Short reply %d(%d min)\n",
4613 nob, (int)LNET_PING_INFO_SIZE(0));
4614 goto fail_ping_buffer_decref;
4617 if (pbuf->pb_info.pi_nnis < n_ids)
4618 n_ids = pbuf->pb_info.pi_nnis;
4620 if (nob < LNET_PING_INFO_SIZE(n_ids)) {
4621 CERROR("%s: Short reply %d(%d expected)\n",
4623 nob, (int)LNET_PING_INFO_SIZE(n_ids));
4624 goto fail_ping_buffer_decref;
4627 rc = -EFAULT; /* if I segv in copy_to_user()... */
4629 memset(&tmpid, 0, sizeof(tmpid));
4630 for (i = 0; i < n_ids; i++) {
4631 tmpid.pid = pbuf->pb_info.pi_pid;
4632 tmpid.nid = pbuf->pb_info.pi_ni[i].ns_nid;
4633 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
4634 goto fail_ping_buffer_decref;
4636 rc = pbuf->pb_info.pi_nnis;
4638 fail_ping_buffer_decref:
4639 lnet_ping_buffer_decref(pbuf);
4644 lnet_discover(struct lnet_process_id id, __u32 force,
4645 struct lnet_process_id __user *ids, int n_ids)
4647 struct lnet_peer_ni *lpni;
4648 struct lnet_peer_ni *p;
4649 struct lnet_peer *lp;
4650 struct lnet_process_id *buf;
4656 id.nid == LNET_NID_ANY)
4659 if (id.pid == LNET_PID_ANY)
4660 id.pid = LNET_PID_LUSTRE;
4663 * If the user buffer has more space than the lnet_interfaces_max,
4664 * then only fill it up to lnet_interfaces_max.
4666 if (n_ids > lnet_interfaces_max)
4667 n_ids = lnet_interfaces_max;
4669 CFS_ALLOC_PTR_ARRAY(buf, n_ids);
4673 cpt = lnet_net_lock_current();
4674 lpni = lnet_nid2peerni_locked(id.nid, LNET_NID_ANY, cpt);
4681 * Clearing the NIDS_UPTODATE flag ensures the peer will
4682 * be discovered, provided discovery has not been disabled.
4684 lp = lpni->lpni_peer_net->lpn_peer;
4685 spin_lock(&lp->lp_lock);
4686 lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
4687 /* If the force flag is set, force a PING and PUSH as well. */
4689 lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
4690 spin_unlock(&lp->lp_lock);
4691 rc = lnet_discover_peer_locked(lpni, cpt, true);
4695 /* The lpni (or lp) for this NID may have changed and our ref is
4696 * the only thing keeping the old one around. Release the ref
4697 * and lookup the lpni again
4699 lnet_peer_ni_decref_locked(lpni);
4700 lpni = lnet_find_peer_ni_locked(id.nid);
4705 lp = lpni->lpni_peer_net->lpn_peer;
4709 while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
4710 buf[i].pid = id.pid;
4711 buf[i].nid = p->lpni_nid;
4718 lnet_peer_ni_decref_locked(lpni);
4720 lnet_net_unlock(cpt);
4723 if (copy_to_user(ids, buf, rc * sizeof(*buf)))
4725 CFS_FREE_PTR_ARRAY(buf, n_ids);
4731 * Retrieve peer discovery status.
4733 * \retval 1 if lnet_peer_discovery_disabled is 0
4734 * \retval 0 if lnet_peer_discovery_disabled is 1
4737 LNetGetPeerDiscoveryStatus(void)
4739 return !lnet_peer_discovery_disabled;
4741 EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);