4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LNET
35 #include <linux/ctype.h>
36 #include <linux/log2.h>
37 #include <linux/ktime.h>
38 #include <linux/moduleparam.h>
39 #include <linux/uaccess.h>
41 #include <lnet/lib-lnet.h>
43 #define D_LNI D_CONSOLE
46 * initialize ln_api_mutex statically, since it needs to be used in
47 * discovery_set callback. That module parameter callback can be called
48 * before module init completes. The mutex needs to be ready for use then.
50 struct lnet the_lnet = {
51 .ln_api_mutex = __MUTEX_INITIALIZER(the_lnet.ln_api_mutex),
52 }; /* THE state of the network */
53 EXPORT_SYMBOL(the_lnet);
55 static char *ip2nets = "";
56 module_param(ip2nets, charp, 0444);
57 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
59 static char *networks = "";
60 module_param(networks, charp, 0444);
61 MODULE_PARM_DESC(networks, "local networks");
63 static char *routes = "";
64 module_param(routes, charp, 0444);
65 MODULE_PARM_DESC(routes, "routes to non-local networks");
67 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
68 module_param(rnet_htable_size, int, 0444);
69 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
71 static int use_tcp_bonding = false;
72 module_param(use_tcp_bonding, int, 0444);
73 MODULE_PARM_DESC(use_tcp_bonding,
74 "Set to 1 to use socklnd bonding. 0 to use Multi-Rail");
76 unsigned int lnet_numa_range = 0;
77 module_param(lnet_numa_range, uint, 0444);
78 MODULE_PARM_DESC(lnet_numa_range,
79 "NUMA range to consider during Multi-Rail selection");
82 * lnet_health_sensitivity determines by how much we decrement the health
83 * value on sending error. The value defaults to 100, which means health
84 * interface health is decremented by 100 points every failure.
86 unsigned int lnet_health_sensitivity = 100;
87 static int sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp);
88 #ifdef HAVE_KERNEL_PARAM_OPS
89 static struct kernel_param_ops param_ops_health_sensitivity = {
90 .set = sensitivity_set,
93 #define param_check_health_sensitivity(name, p) \
94 __param_check(name, p, int)
95 module_param(lnet_health_sensitivity, health_sensitivity, S_IRUGO|S_IWUSR);
97 module_param_call(lnet_health_sensitivity, sensitivity_set, param_get_int,
98 &lnet_health_sensitivity, S_IRUGO|S_IWUSR);
100 MODULE_PARM_DESC(lnet_health_sensitivity,
101 "Value to decrement the health value by on error");
104 * lnet_recovery_interval determines how often we should perform recovery
105 * on unhealthy interfaces.
107 unsigned int lnet_recovery_interval = 1;
108 static int recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp);
109 #ifdef HAVE_KERNEL_PARAM_OPS
110 static struct kernel_param_ops param_ops_recovery_interval = {
111 .set = recovery_interval_set,
112 .get = param_get_int,
114 #define param_check_recovery_interval(name, p) \
115 __param_check(name, p, int)
116 module_param(lnet_recovery_interval, recovery_interval, S_IRUGO|S_IWUSR);
118 module_param_call(lnet_recovery_interval, recovery_interval_set, param_get_int,
119 &lnet_recovery_interval, S_IRUGO|S_IWUSR);
121 MODULE_PARM_DESC(lnet_recovery_interval,
122 "Interval to recover unhealthy interfaces in seconds");
124 static int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
125 static int intf_max_set(const char *val, cfs_kernel_param_arg_t *kp);
127 static struct kernel_param_ops param_ops_interfaces_max = {
129 .get = param_get_int,
132 #define param_check_interfaces_max(name, p) \
133 __param_check(name, p, int)
135 #ifdef HAVE_KERNEL_PARAM_OPS
136 module_param(lnet_interfaces_max, interfaces_max, 0644);
138 module_param_call(lnet_interfaces_max, intf_max_set, param_get_int,
139 ¶m_ops_interfaces_max, 0644);
141 MODULE_PARM_DESC(lnet_interfaces_max,
142 "Maximum number of interfaces in a node.");
144 unsigned lnet_peer_discovery_disabled = 0;
145 static int discovery_set(const char *val, cfs_kernel_param_arg_t *kp);
147 static struct kernel_param_ops param_ops_discovery_disabled = {
148 .set = discovery_set,
149 .get = param_get_int,
152 #define param_check_discovery_disabled(name, p) \
153 __param_check(name, p, int)
154 #ifdef HAVE_KERNEL_PARAM_OPS
155 module_param(lnet_peer_discovery_disabled, discovery_disabled, 0644);
157 module_param_call(lnet_peer_discovery_disabled, discovery_set, param_get_int,
158 ¶m_ops_discovery_disabled, 0644);
160 MODULE_PARM_DESC(lnet_peer_discovery_disabled,
161 "Set to 1 to disable peer discovery on this node.");
163 unsigned int lnet_drop_asym_route;
164 static int drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp);
166 static struct kernel_param_ops param_ops_drop_asym_route = {
167 .set = drop_asym_route_set,
168 .get = param_get_int,
171 #define param_check_drop_asym_route(name, p) \
172 __param_check(name, p, int)
173 #ifdef HAVE_KERNEL_PARAM_OPS
174 module_param(lnet_drop_asym_route, drop_asym_route, 0644);
176 module_param_call(lnet_drop_asym_route, drop_asym_route_set, param_get_int,
177 ¶m_ops_drop_asym_route, 0644);
179 MODULE_PARM_DESC(lnet_drop_asym_route,
180 "Set to 1 to drop asymmetrical route messages.");
182 #define LNET_TRANSACTION_TIMEOUT_NO_HEALTH_DEFAULT 50
183 #define LNET_TRANSACTION_TIMEOUT_HEALTH_DEFAULT 10
185 unsigned lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_HEALTH_DEFAULT;
186 static int transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp);
187 #ifdef HAVE_KERNEL_PARAM_OPS
188 static struct kernel_param_ops param_ops_transaction_timeout = {
189 .set = transaction_to_set,
190 .get = param_get_int,
193 #define param_check_transaction_timeout(name, p) \
194 __param_check(name, p, int)
195 module_param(lnet_transaction_timeout, transaction_timeout, S_IRUGO|S_IWUSR);
197 module_param_call(lnet_transaction_timeout, transaction_to_set, param_get_int,
198 &lnet_transaction_timeout, S_IRUGO|S_IWUSR);
200 MODULE_PARM_DESC(lnet_transaction_timeout,
201 "Maximum number of seconds to wait for a peer response.");
203 #define LNET_RETRY_COUNT_HEALTH_DEFAULT 3
204 unsigned lnet_retry_count = LNET_RETRY_COUNT_HEALTH_DEFAULT;
205 static int retry_count_set(const char *val, cfs_kernel_param_arg_t *kp);
206 #ifdef HAVE_KERNEL_PARAM_OPS
207 static struct kernel_param_ops param_ops_retry_count = {
208 .set = retry_count_set,
209 .get = param_get_int,
212 #define param_check_retry_count(name, p) \
213 __param_check(name, p, int)
214 module_param(lnet_retry_count, retry_count, S_IRUGO|S_IWUSR);
216 module_param_call(lnet_retry_count, retry_count_set, param_get_int,
217 &lnet_retry_count, S_IRUGO|S_IWUSR);
219 MODULE_PARM_DESC(lnet_retry_count,
220 "Maximum number of times to retry transmitting a message");
223 unsigned lnet_lnd_timeout = LNET_LND_DEFAULT_TIMEOUT;
224 unsigned int lnet_current_net_count;
227 * This sequence number keeps track of how many times DLC was used to
228 * update the local NIs. It is incremented when a NI is added or
229 * removed and checked when sending a message to determine if there is
230 * a need to re-run the selection algorithm. See lnet_select_pathway()
231 * for more details on its usage.
233 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
235 static int lnet_ping(struct lnet_process_id id, signed long timeout,
236 struct lnet_process_id __user *ids, int n_ids);
238 static int lnet_discover(struct lnet_process_id id, __u32 force,
239 struct lnet_process_id __user *ids, int n_ids);
242 sensitivity_set(const char *val, cfs_kernel_param_arg_t *kp)
245 unsigned *sensitivity = (unsigned *)kp->arg;
248 rc = kstrtoul(val, 0, &value);
250 CERROR("Invalid module parameter value for 'lnet_health_sensitivity'\n");
255 * The purpose of locking the api_mutex here is to ensure that
256 * the correct value ends up stored properly.
258 mutex_lock(&the_lnet.ln_api_mutex);
260 if (value > LNET_MAX_HEALTH_VALUE) {
261 mutex_unlock(&the_lnet.ln_api_mutex);
262 CERROR("Invalid health value. Maximum: %d value = %lu\n",
263 LNET_MAX_HEALTH_VALUE, value);
268 * if we're turning on health then use the health timeout
271 if (*sensitivity == 0 && value != 0) {
272 lnet_transaction_timeout = LNET_TRANSACTION_TIMEOUT_HEALTH_DEFAULT;
273 lnet_retry_count = LNET_RETRY_COUNT_HEALTH_DEFAULT;
275 * if we're turning off health then use the no health timeout
278 } else if (*sensitivity != 0 && value == 0) {
279 lnet_transaction_timeout =
280 LNET_TRANSACTION_TIMEOUT_NO_HEALTH_DEFAULT;
281 lnet_retry_count = 0;
284 *sensitivity = value;
286 mutex_unlock(&the_lnet.ln_api_mutex);
292 recovery_interval_set(const char *val, cfs_kernel_param_arg_t *kp)
295 unsigned *interval = (unsigned *)kp->arg;
298 rc = kstrtoul(val, 0, &value);
300 CERROR("Invalid module parameter value for 'lnet_recovery_interval'\n");
305 CERROR("lnet_recovery_interval must be at least 1 second\n");
310 * The purpose of locking the api_mutex here is to ensure that
311 * the correct value ends up stored properly.
313 mutex_lock(&the_lnet.ln_api_mutex);
317 mutex_unlock(&the_lnet.ln_api_mutex);
323 discovery_set(const char *val, cfs_kernel_param_arg_t *kp)
326 unsigned *discovery = (unsigned *)kp->arg;
328 struct lnet_ping_buffer *pbuf;
330 rc = kstrtoul(val, 0, &value);
332 CERROR("Invalid module parameter value for 'lnet_peer_discovery_disabled'\n");
336 value = (value) ? 1 : 0;
339 * The purpose of locking the api_mutex here is to ensure that
340 * the correct value ends up stored properly.
342 mutex_lock(&the_lnet.ln_api_mutex);
344 if (value == *discovery) {
345 mutex_unlock(&the_lnet.ln_api_mutex);
351 if (the_lnet.ln_state != LNET_STATE_RUNNING) {
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 lnet_push_update_to_peers(1);
367 mutex_unlock(&the_lnet.ln_api_mutex);
373 drop_asym_route_set(const char *val, cfs_kernel_param_arg_t *kp)
376 unsigned int *drop_asym_route = (unsigned int *)kp->arg;
379 rc = kstrtoul(val, 0, &value);
381 CERROR("Invalid module parameter value for "
382 "'lnet_drop_asym_route'\n");
387 * The purpose of locking the api_mutex here is to ensure that
388 * the correct value ends up stored properly.
390 mutex_lock(&the_lnet.ln_api_mutex);
392 if (value == *drop_asym_route) {
393 mutex_unlock(&the_lnet.ln_api_mutex);
397 *drop_asym_route = value;
399 mutex_unlock(&the_lnet.ln_api_mutex);
405 transaction_to_set(const char *val, cfs_kernel_param_arg_t *kp)
408 unsigned *transaction_to = (unsigned *)kp->arg;
411 rc = kstrtoul(val, 0, &value);
413 CERROR("Invalid module parameter value for 'lnet_transaction_timeout'\n");
418 * The purpose of locking the api_mutex here is to ensure that
419 * the correct value ends up stored properly.
421 mutex_lock(&the_lnet.ln_api_mutex);
423 if (value < lnet_retry_count || value == 0) {
424 mutex_unlock(&the_lnet.ln_api_mutex);
425 CERROR("Invalid value for lnet_transaction_timeout (%lu). "
426 "Has to be greater than lnet_retry_count (%u)\n",
427 value, lnet_retry_count);
431 if (value == *transaction_to) {
432 mutex_unlock(&the_lnet.ln_api_mutex);
436 *transaction_to = value;
437 if (lnet_retry_count == 0)
438 lnet_lnd_timeout = value;
440 lnet_lnd_timeout = value / lnet_retry_count;
442 mutex_unlock(&the_lnet.ln_api_mutex);
448 retry_count_set(const char *val, cfs_kernel_param_arg_t *kp)
451 unsigned *retry_count = (unsigned *)kp->arg;
454 rc = kstrtoul(val, 0, &value);
456 CERROR("Invalid module parameter value for 'lnet_retry_count'\n");
461 * The purpose of locking the api_mutex here is to ensure that
462 * the correct value ends up stored properly.
464 mutex_lock(&the_lnet.ln_api_mutex);
466 if (lnet_health_sensitivity == 0) {
467 mutex_unlock(&the_lnet.ln_api_mutex);
468 CERROR("Can not set retry_count when health feature is turned off\n");
472 if (value > lnet_transaction_timeout) {
473 mutex_unlock(&the_lnet.ln_api_mutex);
474 CERROR("Invalid value for lnet_retry_count (%lu). "
475 "Has to be smaller than lnet_transaction_timeout (%u)\n",
476 value, lnet_transaction_timeout);
480 *retry_count = value;
483 lnet_lnd_timeout = lnet_transaction_timeout;
485 lnet_lnd_timeout = lnet_transaction_timeout / value;
487 mutex_unlock(&the_lnet.ln_api_mutex);
493 intf_max_set(const char *val, cfs_kernel_param_arg_t *kp)
497 rc = kstrtoint(val, 0, &value);
499 CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
503 if (value < LNET_INTERFACES_MIN) {
504 CWARN("max interfaces provided are too small, setting to %d\n",
505 LNET_INTERFACES_MAX_DEFAULT);
506 value = LNET_INTERFACES_MAX_DEFAULT;
509 *(int *)kp->arg = value;
515 lnet_get_routes(void)
521 lnet_get_networks(void)
526 if (*networks != 0 && *ip2nets != 0) {
527 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
528 "'ip2nets' but not both at once\n");
533 rc = lnet_parse_ip2nets(&nets, ip2nets);
534 return (rc == 0) ? nets : NULL;
544 lnet_init_locks(void)
546 spin_lock_init(&the_lnet.ln_eq_wait_lock);
547 spin_lock_init(&the_lnet.ln_msg_resend_lock);
548 init_waitqueue_head(&the_lnet.ln_eq_waitq);
549 init_waitqueue_head(&the_lnet.ln_mt_waitq);
550 mutex_init(&the_lnet.ln_lnd_mutex);
554 lnet_fini_locks(void)
558 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
559 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
563 lnet_descriptor_setup(void)
565 /* create specific kmem_cache for MEs and small MDs (i.e., originally
566 * allocated in <size-xxx> kmem_cache).
568 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
570 if (!lnet_mes_cachep)
573 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
574 LNET_SMALL_MD_SIZE, 0, 0,
576 if (!lnet_small_mds_cachep)
583 lnet_descriptor_cleanup(void)
586 if (lnet_small_mds_cachep) {
587 kmem_cache_destroy(lnet_small_mds_cachep);
588 lnet_small_mds_cachep = NULL;
591 if (lnet_mes_cachep) {
592 kmem_cache_destroy(lnet_mes_cachep);
593 lnet_mes_cachep = NULL;
598 lnet_create_remote_nets_table(void)
601 struct list_head *hash;
603 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
604 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
605 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
607 CERROR("Failed to create remote nets hash table\n");
611 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
612 INIT_LIST_HEAD(&hash[i]);
613 the_lnet.ln_remote_nets_hash = hash;
618 lnet_destroy_remote_nets_table(void)
622 if (the_lnet.ln_remote_nets_hash == NULL)
625 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
626 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
628 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
629 LNET_REMOTE_NETS_HASH_SIZE *
630 sizeof(the_lnet.ln_remote_nets_hash[0]));
631 the_lnet.ln_remote_nets_hash = NULL;
635 lnet_destroy_locks(void)
637 if (the_lnet.ln_res_lock != NULL) {
638 cfs_percpt_lock_free(the_lnet.ln_res_lock);
639 the_lnet.ln_res_lock = NULL;
642 if (the_lnet.ln_net_lock != NULL) {
643 cfs_percpt_lock_free(the_lnet.ln_net_lock);
644 the_lnet.ln_net_lock = NULL;
651 lnet_create_locks(void)
655 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
656 if (the_lnet.ln_res_lock == NULL)
659 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
660 if (the_lnet.ln_net_lock == NULL)
666 lnet_destroy_locks();
670 static void lnet_assert_wire_constants(void)
672 /* Wire protocol assertions generated by 'wirecheck'
673 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
674 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
675 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
678 CLASSERT(LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
679 CLASSERT(LNET_PROTO_TCP_VERSION_MAJOR == 1);
680 CLASSERT(LNET_PROTO_TCP_VERSION_MINOR == 0);
681 CLASSERT(LNET_MSG_ACK == 0);
682 CLASSERT(LNET_MSG_PUT == 1);
683 CLASSERT(LNET_MSG_GET == 2);
684 CLASSERT(LNET_MSG_REPLY == 3);
685 CLASSERT(LNET_MSG_HELLO == 4);
687 /* Checks for struct lnet_handle_wire */
688 CLASSERT((int)sizeof(struct lnet_handle_wire) == 16);
689 CLASSERT((int)offsetof(struct lnet_handle_wire, wh_interface_cookie) == 0);
690 CLASSERT((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) == 8);
691 CLASSERT((int)offsetof(struct lnet_handle_wire, wh_object_cookie) == 8);
692 CLASSERT((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) == 8);
694 /* Checks for struct struct lnet_magicversion */
695 CLASSERT((int)sizeof(struct lnet_magicversion) == 8);
696 CLASSERT((int)offsetof(struct lnet_magicversion, magic) == 0);
697 CLASSERT((int)sizeof(((struct lnet_magicversion *)0)->magic) == 4);
698 CLASSERT((int)offsetof(struct lnet_magicversion, version_major) == 4);
699 CLASSERT((int)sizeof(((struct lnet_magicversion *)0)->version_major) == 2);
700 CLASSERT((int)offsetof(struct lnet_magicversion, version_minor) == 6);
701 CLASSERT((int)sizeof(((struct lnet_magicversion *)0)->version_minor) == 2);
703 /* Checks for struct struct lnet_hdr */
704 CLASSERT((int)sizeof(struct lnet_hdr) == 72);
705 CLASSERT((int)offsetof(struct lnet_hdr, dest_nid) == 0);
706 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->dest_nid) == 8);
707 CLASSERT((int)offsetof(struct lnet_hdr, src_nid) == 8);
708 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->src_nid) == 8);
709 CLASSERT((int)offsetof(struct lnet_hdr, dest_pid) == 16);
710 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->dest_pid) == 4);
711 CLASSERT((int)offsetof(struct lnet_hdr, src_pid) == 20);
712 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->src_pid) == 4);
713 CLASSERT((int)offsetof(struct lnet_hdr, type) == 24);
714 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->type) == 4);
715 CLASSERT((int)offsetof(struct lnet_hdr, payload_length) == 28);
716 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->payload_length) == 4);
717 CLASSERT((int)offsetof(struct lnet_hdr, msg) == 32);
718 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg) == 40);
721 CLASSERT((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) == 32);
722 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) == 16);
723 CLASSERT((int)offsetof(struct lnet_hdr, msg.ack.match_bits) == 48);
724 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) == 8);
725 CLASSERT((int)offsetof(struct lnet_hdr, msg.ack.mlength) == 56);
726 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) == 4);
729 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) == 32);
730 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) == 16);
731 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.match_bits) == 48);
732 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) == 8);
733 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.hdr_data) == 56);
734 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) == 8);
735 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.ptl_index) == 64);
736 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) == 4);
737 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.offset) == 68);
738 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) == 4);
741 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.return_wmd) == 32);
742 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) == 16);
743 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.match_bits) == 48);
744 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) == 8);
745 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.ptl_index) == 56);
746 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) == 4);
747 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.src_offset) == 60);
748 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) == 4);
749 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.sink_length) == 64);
750 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) == 4);
753 CLASSERT((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) == 32);
754 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) == 16);
757 CLASSERT((int)offsetof(struct lnet_hdr, msg.hello.incarnation) == 32);
758 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) == 8);
759 CLASSERT((int)offsetof(struct lnet_hdr, msg.hello.type) == 40);
760 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) == 4);
762 /* Checks for struct lnet_ni_status and related constants */
763 CLASSERT(LNET_NI_STATUS_INVALID == 0x00000000);
764 CLASSERT(LNET_NI_STATUS_UP == 0x15aac0de);
765 CLASSERT(LNET_NI_STATUS_DOWN == 0xdeadface);
767 /* Checks for struct lnet_ni_status */
768 CLASSERT((int)sizeof(struct lnet_ni_status) == 16);
769 CLASSERT((int)offsetof(struct lnet_ni_status, ns_nid) == 0);
770 CLASSERT((int)sizeof(((struct lnet_ni_status *)0)->ns_nid) == 8);
771 CLASSERT((int)offsetof(struct lnet_ni_status, ns_status) == 8);
772 CLASSERT((int)sizeof(((struct lnet_ni_status *)0)->ns_status) == 4);
773 CLASSERT((int)offsetof(struct lnet_ni_status, ns_unused) == 12);
774 CLASSERT((int)sizeof(((struct lnet_ni_status *)0)->ns_unused) == 4);
776 /* Checks for struct lnet_ping_info and related constants */
777 CLASSERT(LNET_PROTO_PING_MAGIC == 0x70696E67);
778 CLASSERT(LNET_PING_FEAT_INVAL == 0);
779 CLASSERT(LNET_PING_FEAT_BASE == 1);
780 CLASSERT(LNET_PING_FEAT_NI_STATUS == 2);
781 CLASSERT(LNET_PING_FEAT_RTE_DISABLED == 4);
782 CLASSERT(LNET_PING_FEAT_MULTI_RAIL == 8);
783 CLASSERT(LNET_PING_FEAT_DISCOVERY == 16);
784 CLASSERT(LNET_PING_FEAT_BITS == 31);
786 /* Checks for struct lnet_ping_info */
787 CLASSERT((int)sizeof(struct lnet_ping_info) == 16);
788 CLASSERT((int)offsetof(struct lnet_ping_info, pi_magic) == 0);
789 CLASSERT((int)sizeof(((struct lnet_ping_info *)0)->pi_magic) == 4);
790 CLASSERT((int)offsetof(struct lnet_ping_info, pi_features) == 4);
791 CLASSERT((int)sizeof(((struct lnet_ping_info *)0)->pi_features) == 4);
792 CLASSERT((int)offsetof(struct lnet_ping_info, pi_pid) == 8);
793 CLASSERT((int)sizeof(((struct lnet_ping_info *)0)->pi_pid) == 4);
794 CLASSERT((int)offsetof(struct lnet_ping_info, pi_nnis) == 12);
795 CLASSERT((int)sizeof(((struct lnet_ping_info *)0)->pi_nnis) == 4);
796 CLASSERT((int)offsetof(struct lnet_ping_info, pi_ni) == 16);
797 CLASSERT((int)sizeof(((struct lnet_ping_info *)0)->pi_ni) == 0);
800 static struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
802 struct lnet_lnd *lnd;
803 struct list_head *tmp;
805 /* holding lnd mutex */
806 list_for_each(tmp, &the_lnet.ln_lnds) {
807 lnd = list_entry(tmp, struct lnet_lnd, lnd_list);
809 if (lnd->lnd_type == type)
816 lnet_get_lnd_timeout(void)
818 return lnet_lnd_timeout;
820 EXPORT_SYMBOL(lnet_get_lnd_timeout);
823 lnet_register_lnd(struct lnet_lnd *lnd)
825 mutex_lock(&the_lnet.ln_lnd_mutex);
827 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
828 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
830 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
831 lnd->lnd_refcount = 0;
833 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
835 mutex_unlock(&the_lnet.ln_lnd_mutex);
837 EXPORT_SYMBOL(lnet_register_lnd);
840 lnet_unregister_lnd(struct lnet_lnd *lnd)
842 mutex_lock(&the_lnet.ln_lnd_mutex);
844 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
845 LASSERT(lnd->lnd_refcount == 0);
847 list_del(&lnd->lnd_list);
848 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
850 mutex_unlock(&the_lnet.ln_lnd_mutex);
852 EXPORT_SYMBOL(lnet_unregister_lnd);
855 lnet_counters_get_common(struct lnet_counters_common *common)
857 struct lnet_counters *ctr;
860 memset(common, 0, sizeof(*common));
862 lnet_net_lock(LNET_LOCK_EX);
864 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
865 common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
866 common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
867 common->lcc_errors += ctr->lct_common.lcc_errors;
868 common->lcc_send_count += ctr->lct_common.lcc_send_count;
869 common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
870 common->lcc_route_count += ctr->lct_common.lcc_route_count;
871 common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
872 common->lcc_send_length += ctr->lct_common.lcc_send_length;
873 common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
874 common->lcc_route_length += ctr->lct_common.lcc_route_length;
875 common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
877 lnet_net_unlock(LNET_LOCK_EX);
879 EXPORT_SYMBOL(lnet_counters_get_common);
882 lnet_counters_get(struct lnet_counters *counters)
884 struct lnet_counters *ctr;
885 struct lnet_counters_health *health = &counters->lct_health;
888 memset(counters, 0, sizeof(*counters));
890 lnet_counters_get_common(&counters->lct_common);
892 lnet_net_lock(LNET_LOCK_EX);
894 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
895 health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
896 health->lch_resend_count += ctr->lct_health.lch_resend_count;
897 health->lch_response_timeout_count +=
898 ctr->lct_health.lch_response_timeout_count;
899 health->lch_local_interrupt_count +=
900 ctr->lct_health.lch_local_interrupt_count;
901 health->lch_local_dropped_count +=
902 ctr->lct_health.lch_local_dropped_count;
903 health->lch_local_aborted_count +=
904 ctr->lct_health.lch_local_aborted_count;
905 health->lch_local_no_route_count +=
906 ctr->lct_health.lch_local_no_route_count;
907 health->lch_local_timeout_count +=
908 ctr->lct_health.lch_local_timeout_count;
909 health->lch_local_error_count +=
910 ctr->lct_health.lch_local_error_count;
911 health->lch_remote_dropped_count +=
912 ctr->lct_health.lch_remote_dropped_count;
913 health->lch_remote_error_count +=
914 ctr->lct_health.lch_remote_error_count;
915 health->lch_remote_timeout_count +=
916 ctr->lct_health.lch_remote_timeout_count;
917 health->lch_network_timeout_count +=
918 ctr->lct_health.lch_network_timeout_count;
920 lnet_net_unlock(LNET_LOCK_EX);
922 EXPORT_SYMBOL(lnet_counters_get);
925 lnet_counters_reset(void)
927 struct lnet_counters *counters;
930 lnet_net_lock(LNET_LOCK_EX);
932 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
933 memset(counters, 0, sizeof(struct lnet_counters));
935 lnet_net_unlock(LNET_LOCK_EX);
939 lnet_res_type2str(int type)
944 case LNET_COOKIE_TYPE_MD:
946 case LNET_COOKIE_TYPE_ME:
948 case LNET_COOKIE_TYPE_EQ:
954 lnet_res_container_cleanup(struct lnet_res_container *rec)
958 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
961 while (!list_empty(&rec->rec_active)) {
962 struct list_head *e = rec->rec_active.next;
965 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
966 lnet_eq_free(list_entry(e, struct lnet_eq, eq_list));
968 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
969 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
971 } else { /* NB: Active MEs should be attached on portals */
978 /* Found alive MD/ME/EQ, user really should unlink/free
979 * all of them before finalize LNet, but if someone didn't,
980 * we have to recycle garbage for him */
981 CERROR("%d active elements on exit of %s container\n",
982 count, lnet_res_type2str(rec->rec_type));
985 if (rec->rec_lh_hash != NULL) {
986 LIBCFS_FREE(rec->rec_lh_hash,
987 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
988 rec->rec_lh_hash = NULL;
991 rec->rec_type = 0; /* mark it as finalized */
995 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
1000 LASSERT(rec->rec_type == 0);
1002 rec->rec_type = type;
1003 INIT_LIST_HEAD(&rec->rec_active);
1005 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
1007 /* Arbitrary choice of hash table size */
1008 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
1009 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
1010 if (rec->rec_lh_hash == NULL) {
1015 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
1016 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
1021 CERROR("Failed to setup %s resource container\n",
1022 lnet_res_type2str(type));
1023 lnet_res_container_cleanup(rec);
1028 lnet_res_containers_destroy(struct lnet_res_container **recs)
1030 struct lnet_res_container *rec;
1033 cfs_percpt_for_each(rec, i, recs)
1034 lnet_res_container_cleanup(rec);
1036 cfs_percpt_free(recs);
1039 static struct lnet_res_container **
1040 lnet_res_containers_create(int type)
1042 struct lnet_res_container **recs;
1043 struct lnet_res_container *rec;
1047 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
1049 CERROR("Failed to allocate %s resource containers\n",
1050 lnet_res_type2str(type));
1054 cfs_percpt_for_each(rec, i, recs) {
1055 rc = lnet_res_container_setup(rec, i, type);
1057 lnet_res_containers_destroy(recs);
1065 struct lnet_libhandle *
1066 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
1068 /* ALWAYS called with lnet_res_lock held */
1069 struct list_head *head;
1070 struct lnet_libhandle *lh;
1073 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
1076 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
1077 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
1079 list_for_each_entry(lh, head, lh_hash_chain) {
1080 if (lh->lh_cookie == cookie)
1088 lnet_res_lh_initialize(struct lnet_res_container *rec,
1089 struct lnet_libhandle *lh)
1091 /* ALWAYS called with lnet_res_lock held */
1092 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
1095 lh->lh_cookie = rec->rec_lh_cookie;
1096 rec->rec_lh_cookie += 1 << ibits;
1098 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
1100 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
1103 static int lnet_unprepare(void);
1106 lnet_prepare(lnet_pid_t requested_pid)
1108 /* Prepare to bring up the network */
1109 struct lnet_res_container **recs;
1112 if (requested_pid == LNET_PID_ANY) {
1113 /* Don't instantiate LNET just for me */
1117 LASSERT(the_lnet.ln_refcount == 0);
1119 the_lnet.ln_routing = 0;
1121 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
1122 the_lnet.ln_pid = requested_pid;
1124 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
1125 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
1126 INIT_LIST_HEAD(&the_lnet.ln_nets);
1127 INIT_LIST_HEAD(&the_lnet.ln_routers);
1128 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
1129 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
1130 INIT_LIST_HEAD(&the_lnet.ln_dc_request);
1131 INIT_LIST_HEAD(&the_lnet.ln_dc_working);
1132 INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
1133 INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
1134 INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
1135 init_waitqueue_head(&the_lnet.ln_dc_waitq);
1136 LNetInvalidateEQHandle(&the_lnet.ln_mt_eqh);
1137 init_completion(&the_lnet.ln_started);
1139 rc = lnet_descriptor_setup();
1143 rc = lnet_create_remote_nets_table();
1148 * NB the interface cookie in wire handles guards against delayed
1149 * replies and ACKs appearing valid after reboot.
1151 the_lnet.ln_interface_cookie = ktime_get_real_ns();
1153 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
1154 sizeof(struct lnet_counters));
1155 if (the_lnet.ln_counters == NULL) {
1156 CERROR("Failed to allocate counters for LNet\n");
1161 rc = lnet_peer_tables_create();
1165 rc = lnet_msg_containers_create();
1169 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
1170 LNET_COOKIE_TYPE_EQ);
1174 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
1180 the_lnet.ln_me_containers = recs;
1182 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
1188 the_lnet.ln_md_containers = recs;
1190 rc = lnet_portals_create();
1192 CERROR("Failed to create portals for LNet: %d\n", rc);
1204 lnet_unprepare (void)
1208 /* NB no LNET_LOCK since this is the last reference. All LND instances
1209 * have shut down already, so it is safe to unlink and free all
1210 * descriptors, even those that appear committed to a network op (eg MD
1211 * with non-zero pending count) */
1213 lnet_fail_nid(LNET_NID_ANY, 0);
1215 LASSERT(the_lnet.ln_refcount == 0);
1216 LASSERT(list_empty(&the_lnet.ln_test_peers));
1217 LASSERT(list_empty(&the_lnet.ln_nets));
1219 if (!LNetEQHandleIsInvalid(the_lnet.ln_mt_eqh)) {
1220 rc = LNetEQFree(the_lnet.ln_mt_eqh);
1221 LNetInvalidateEQHandle(&the_lnet.ln_mt_eqh);
1225 lnet_portals_destroy();
1227 if (the_lnet.ln_md_containers != NULL) {
1228 lnet_res_containers_destroy(the_lnet.ln_md_containers);
1229 the_lnet.ln_md_containers = NULL;
1232 if (the_lnet.ln_me_containers != NULL) {
1233 lnet_res_containers_destroy(the_lnet.ln_me_containers);
1234 the_lnet.ln_me_containers = NULL;
1237 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
1239 lnet_msg_containers_destroy();
1241 lnet_rtrpools_free(0);
1243 if (the_lnet.ln_counters != NULL) {
1244 cfs_percpt_free(the_lnet.ln_counters);
1245 the_lnet.ln_counters = NULL;
1247 lnet_destroy_remote_nets_table();
1248 lnet_descriptor_cleanup();
1254 lnet_net2ni_locked(__u32 net_id, int cpt)
1257 struct lnet_net *net;
1259 LASSERT(cpt != LNET_LOCK_EX);
1261 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1262 if (net->net_id == net_id) {
1263 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
1273 lnet_net2ni_addref(__u32 net)
1278 ni = lnet_net2ni_locked(net, 0);
1280 lnet_ni_addref_locked(ni, 0);
1285 EXPORT_SYMBOL(lnet_net2ni_addref);
1288 lnet_get_net_locked(__u32 net_id)
1290 struct lnet_net *net;
1292 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1293 if (net->net_id == net_id)
1301 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
1306 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
1311 val = hash_long(key, LNET_CPT_BITS);
1312 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
1316 return (unsigned int)(key + val + (val >> 1)) % number;
1320 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
1322 struct lnet_net *net;
1324 /* must called with hold of lnet_net_lock */
1325 if (LNET_CPT_NUMBER == 1)
1326 return 0; /* the only one */
1329 * If NI is provided then use the CPT identified in the NI cpt
1330 * list if one exists. If one doesn't exist, then that NI is
1331 * associated with all CPTs and it follows that the net it belongs
1332 * to is implicitly associated with all CPTs, so just hash the nid
1336 if (ni->ni_cpts != NULL)
1337 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
1340 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1343 /* no NI provided so look at the net */
1344 net = lnet_get_net_locked(LNET_NIDNET(nid));
1346 if (net != NULL && net->net_cpts != NULL) {
1347 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
1350 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1354 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
1359 if (LNET_CPT_NUMBER == 1)
1360 return 0; /* the only one */
1362 cpt = lnet_net_lock_current();
1364 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
1366 lnet_net_unlock(cpt);
1370 EXPORT_SYMBOL(lnet_cpt_of_nid);
1373 lnet_islocalnet_locked(__u32 net_id)
1375 struct lnet_net *net;
1378 net = lnet_get_net_locked(net_id);
1380 local = net != NULL;
1386 lnet_islocalnet(__u32 net_id)
1391 cpt = lnet_net_lock_current();
1393 local = lnet_islocalnet_locked(net_id);
1395 lnet_net_unlock(cpt);
1401 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
1403 struct lnet_net *net;
1406 LASSERT(cpt != LNET_LOCK_EX);
1408 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1409 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1410 if (ni->ni_nid == nid)
1419 lnet_nid2ni_addref(lnet_nid_t nid)
1424 ni = lnet_nid2ni_locked(nid, 0);
1426 lnet_ni_addref_locked(ni, 0);
1431 EXPORT_SYMBOL(lnet_nid2ni_addref);
1434 lnet_islocalnid(lnet_nid_t nid)
1439 cpt = lnet_net_lock_current();
1440 ni = lnet_nid2ni_locked(nid, cpt);
1441 lnet_net_unlock(cpt);
1447 lnet_count_acceptor_nets(void)
1449 /* Return the # of NIs that need the acceptor. */
1451 struct lnet_net *net;
1454 cpt = lnet_net_lock_current();
1455 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1456 /* all socklnd type networks should have the acceptor
1458 if (net->net_lnd->lnd_accept != NULL)
1462 lnet_net_unlock(cpt);
1467 struct lnet_ping_buffer *
1468 lnet_ping_buffer_alloc(int nnis, gfp_t gfp)
1470 struct lnet_ping_buffer *pbuf;
1472 LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nnis), gfp);
1474 pbuf->pb_nnis = nnis;
1475 atomic_set(&pbuf->pb_refcnt, 1);
1482 lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf)
1484 LASSERT(lnet_ping_buffer_numref(pbuf) == 0);
1485 LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nnis));
1488 static struct lnet_ping_buffer *
1489 lnet_ping_target_create(int nnis)
1491 struct lnet_ping_buffer *pbuf;
1493 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1495 CERROR("Can't allocate ping source [%d]\n", nnis);
1499 pbuf->pb_info.pi_nnis = nnis;
1500 pbuf->pb_info.pi_pid = the_lnet.ln_pid;
1501 pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
1502 pbuf->pb_info.pi_features =
1503 LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
1509 lnet_get_net_ni_count_locked(struct lnet_net *net)
1514 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1521 lnet_get_net_ni_count_pre(struct lnet_net *net)
1526 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1533 lnet_get_ni_count(void)
1536 struct lnet_net *net;
1541 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1542 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1552 lnet_get_net_count(void)
1554 struct lnet_net *net;
1559 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1569 lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
1571 struct lnet_ni_status *stat;
1575 __swab32s(&pbuf->pb_info.pi_magic);
1576 __swab32s(&pbuf->pb_info.pi_features);
1577 __swab32s(&pbuf->pb_info.pi_pid);
1578 __swab32s(&pbuf->pb_info.pi_nnis);
1579 nnis = pbuf->pb_info.pi_nnis;
1580 if (nnis > pbuf->pb_nnis)
1581 nnis = pbuf->pb_nnis;
1582 for (i = 0; i < nnis; i++) {
1583 stat = &pbuf->pb_info.pi_ni[i];
1584 __swab64s(&stat->ns_nid);
1585 __swab32s(&stat->ns_status);
1591 lnet_ping_info_validate(struct lnet_ping_info *pinfo)
1595 if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
1597 if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
1599 /* Loopback is guaranteed to be present */
1600 if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
1602 if (LNET_NETTYP(LNET_NIDNET(LNET_PING_INFO_LONI(pinfo))) != LOLND)
1608 lnet_ping_target_destroy(void)
1610 struct lnet_net *net;
1613 lnet_net_lock(LNET_LOCK_EX);
1615 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1616 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1618 ni->ni_status = NULL;
1623 lnet_ping_buffer_decref(the_lnet.ln_ping_target);
1624 the_lnet.ln_ping_target = NULL;
1626 lnet_net_unlock(LNET_LOCK_EX);
1630 lnet_ping_target_event_handler(struct lnet_event *event)
1632 struct lnet_ping_buffer *pbuf = event->md.user_ptr;
1634 if (event->unlinked)
1635 lnet_ping_buffer_decref(pbuf);
1639 lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
1640 struct lnet_handle_md *ping_mdh,
1641 int ni_count, bool set_eq)
1643 struct lnet_process_id id = {
1644 .nid = LNET_NID_ANY,
1647 struct lnet_handle_me me_handle;
1648 struct lnet_md md = { NULL };
1652 rc = LNetEQAlloc(0, lnet_ping_target_event_handler,
1653 &the_lnet.ln_ping_target_eq);
1655 CERROR("Can't allocate ping buffer EQ: %d\n", rc);
1660 *ppbuf = lnet_ping_target_create(ni_count);
1661 if (*ppbuf == NULL) {
1666 /* Ping target ME/MD */
1667 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1668 LNET_PROTO_PING_MATCHBITS, 0,
1669 LNET_UNLINK, LNET_INS_AFTER,
1672 CERROR("Can't create ping target ME: %d\n", rc);
1673 goto fail_decref_ping_buffer;
1676 /* initialize md content */
1677 md.start = &(*ppbuf)->pb_info;
1678 md.length = LNET_PING_INFO_SIZE((*ppbuf)->pb_nnis);
1679 md.threshold = LNET_MD_THRESH_INF;
1681 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1682 LNET_MD_MANAGE_REMOTE;
1683 md.eq_handle = the_lnet.ln_ping_target_eq;
1684 md.user_ptr = *ppbuf;
1686 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, ping_mdh);
1688 CERROR("Can't attach ping target MD: %d\n", rc);
1689 goto fail_unlink_ping_me;
1691 lnet_ping_buffer_addref(*ppbuf);
1695 fail_unlink_ping_me:
1696 rc2 = LNetMEUnlink(me_handle);
1698 fail_decref_ping_buffer:
1699 LASSERT(lnet_ping_buffer_numref(*ppbuf) == 1);
1700 lnet_ping_buffer_decref(*ppbuf);
1704 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1711 lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
1712 struct lnet_handle_md *ping_mdh)
1714 sigset_t blocked = cfs_block_allsigs();
1716 LNetMDUnlink(*ping_mdh);
1717 LNetInvalidateMDHandle(ping_mdh);
1719 /* NB the MD could be busy; this just starts the unlink */
1720 while (lnet_ping_buffer_numref(pbuf) > 1) {
1721 CDEBUG(D_NET, "Still waiting for ping data MD to unlink\n");
1722 set_current_state(TASK_UNINTERRUPTIBLE);
1723 schedule_timeout(cfs_time_seconds(1));
1726 cfs_restore_sigs(blocked);
1730 lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
1733 struct lnet_net *net;
1734 struct lnet_ni_status *ns;
1739 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1740 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1741 LASSERT(i < pbuf->pb_nnis);
1743 ns = &pbuf->pb_info.pi_ni[i];
1745 ns->ns_nid = ni->ni_nid;
1748 ns->ns_status = (ni->ni_status != NULL) ?
1749 ni->ni_status->ns_status :
1758 * We (ab)use the ns_status of the loopback interface to
1759 * transmit the sequence number. The first interface listed
1760 * must be the loopback interface.
1762 rc = lnet_ping_info_validate(&pbuf->pb_info);
1764 LCONSOLE_EMERG("Invalid ping target: %d\n", rc);
1767 LNET_PING_BUFFER_SEQNO(pbuf) =
1768 atomic_inc_return(&the_lnet.ln_ping_target_seqno);
1772 lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
1773 struct lnet_handle_md ping_mdh)
1775 struct lnet_ping_buffer *old_pbuf = NULL;
1776 struct lnet_handle_md old_ping_md;
1778 /* switch the NIs to point to the new ping info created */
1779 lnet_net_lock(LNET_LOCK_EX);
1781 if (!the_lnet.ln_routing)
1782 pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1783 if (!lnet_peer_discovery_disabled)
1784 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
1786 /* Ensure only known feature bits have been set. */
1787 LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
1788 LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
1790 lnet_ping_target_install_locked(pbuf);
1792 if (the_lnet.ln_ping_target) {
1793 old_pbuf = the_lnet.ln_ping_target;
1794 old_ping_md = the_lnet.ln_ping_target_md;
1796 the_lnet.ln_ping_target_md = ping_mdh;
1797 the_lnet.ln_ping_target = pbuf;
1799 lnet_net_unlock(LNET_LOCK_EX);
1802 /* unlink and free the old ping info */
1803 lnet_ping_md_unlink(old_pbuf, &old_ping_md);
1804 lnet_ping_buffer_decref(old_pbuf);
1807 lnet_push_update_to_peers(0);
1811 lnet_ping_target_fini(void)
1815 lnet_ping_md_unlink(the_lnet.ln_ping_target,
1816 &the_lnet.ln_ping_target_md);
1818 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1821 lnet_ping_target_destroy();
1824 /* Resize the push target. */
1825 int lnet_push_target_resize(void)
1827 struct lnet_process_id id = { LNET_NID_ANY, LNET_PID_ANY };
1828 struct lnet_md md = { NULL };
1829 struct lnet_handle_me meh;
1830 struct lnet_handle_md mdh;
1831 struct lnet_handle_md old_mdh;
1832 struct lnet_ping_buffer *pbuf;
1833 struct lnet_ping_buffer *old_pbuf;
1834 int nnis = the_lnet.ln_push_target_nnis;
1842 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1848 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1849 LNET_PROTO_PING_MATCHBITS, 0,
1850 LNET_UNLINK, LNET_INS_AFTER,
1853 CERROR("Can't create push target ME: %d\n", rc);
1854 goto fail_decref_pbuf;
1857 /* initialize md content */
1858 md.start = &pbuf->pb_info;
1859 md.length = LNET_PING_INFO_SIZE(nnis);
1860 md.threshold = LNET_MD_THRESH_INF;
1862 md.options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE |
1863 LNET_MD_MANAGE_REMOTE;
1865 md.eq_handle = the_lnet.ln_push_target_eq;
1867 rc = LNetMDAttach(meh, md, LNET_RETAIN, &mdh);
1869 CERROR("Can't attach push MD: %d\n", rc);
1870 goto fail_unlink_meh;
1872 lnet_ping_buffer_addref(pbuf);
1874 lnet_net_lock(LNET_LOCK_EX);
1875 old_pbuf = the_lnet.ln_push_target;
1876 old_mdh = the_lnet.ln_push_target_md;
1877 the_lnet.ln_push_target = pbuf;
1878 the_lnet.ln_push_target_md = mdh;
1879 lnet_net_unlock(LNET_LOCK_EX);
1882 LNetMDUnlink(old_mdh);
1883 lnet_ping_buffer_decref(old_pbuf);
1886 if (nnis < the_lnet.ln_push_target_nnis)
1889 CDEBUG(D_NET, "nnis %d success\n", nnis);
1896 lnet_ping_buffer_decref(pbuf);
1898 CDEBUG(D_NET, "nnis %d error %d\n", nnis, rc);
1902 static void lnet_push_target_event_handler(struct lnet_event *ev)
1904 struct lnet_ping_buffer *pbuf = ev->md.user_ptr;
1906 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
1907 lnet_swap_pinginfo(pbuf);
1909 lnet_peer_push_event(ev);
1911 lnet_ping_buffer_decref(pbuf);
1914 /* Initialize the push target. */
1915 static int lnet_push_target_init(void)
1919 if (the_lnet.ln_push_target)
1922 rc = LNetEQAlloc(0, lnet_push_target_event_handler,
1923 &the_lnet.ln_push_target_eq);
1925 CERROR("Can't allocated push target EQ: %d\n", rc);
1929 /* Start at the required minimum, we'll enlarge if required. */
1930 the_lnet.ln_push_target_nnis = LNET_INTERFACES_MIN;
1932 rc = lnet_push_target_resize();
1935 LNetEQFree(the_lnet.ln_push_target_eq);
1936 LNetInvalidateEQHandle(&the_lnet.ln_push_target_eq);
1942 /* Clean up the push target. */
1943 static void lnet_push_target_fini(void)
1945 if (!the_lnet.ln_push_target)
1948 /* Unlink and invalidate to prevent new references. */
1949 LNetMDUnlink(the_lnet.ln_push_target_md);
1950 LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
1952 /* Wait for the unlink to complete. */
1953 while (lnet_ping_buffer_numref(the_lnet.ln_push_target) > 1) {
1954 CDEBUG(D_NET, "Still waiting for ping data MD to unlink\n");
1955 set_current_state(TASK_UNINTERRUPTIBLE);
1956 schedule_timeout(cfs_time_seconds(1));
1959 lnet_ping_buffer_decref(the_lnet.ln_push_target);
1960 the_lnet.ln_push_target = NULL;
1961 the_lnet.ln_push_target_nnis = 0;
1963 LNetEQFree(the_lnet.ln_push_target_eq);
1964 LNetInvalidateEQHandle(&the_lnet.ln_push_target_eq);
1968 lnet_ni_tq_credits(struct lnet_ni *ni)
1972 LASSERT(ni->ni_ncpts >= 1);
1974 if (ni->ni_ncpts == 1)
1975 return ni->ni_net->net_tunables.lct_max_tx_credits;
1977 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
1978 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
1979 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
1985 lnet_ni_unlink_locked(struct lnet_ni *ni)
1987 /* move it to zombie list and nobody can find it anymore */
1988 LASSERT(!list_empty(&ni->ni_netlist));
1989 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
1990 lnet_ni_decref_locked(ni, 0);
1994 lnet_clear_zombies_nis_locked(struct lnet_net *net)
1999 struct list_head *zombie_list = &net->net_ni_zombie;
2002 * Now wait for the NIs I just nuked to show up on the zombie
2003 * list and shut them down in guaranteed thread context
2006 while (!list_empty(zombie_list)) {
2010 ni = list_entry(zombie_list->next,
2011 struct lnet_ni, ni_netlist);
2012 list_del_init(&ni->ni_netlist);
2013 /* the ni should be in deleting state. If it's not it's
2015 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
2016 cfs_percpt_for_each(ref, j, ni->ni_refs) {
2019 /* still busy, add it back to zombie list */
2020 list_add(&ni->ni_netlist, zombie_list);
2024 if (!list_empty(&ni->ni_netlist)) {
2025 lnet_net_unlock(LNET_LOCK_EX);
2027 if ((i & (-i)) == i) {
2029 "Waiting for zombie LNI %s\n",
2030 libcfs_nid2str(ni->ni_nid));
2032 set_current_state(TASK_UNINTERRUPTIBLE);
2033 schedule_timeout(cfs_time_seconds(1));
2034 lnet_net_lock(LNET_LOCK_EX);
2038 lnet_net_unlock(LNET_LOCK_EX);
2040 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
2042 LASSERT(!in_interrupt());
2043 (net->net_lnd->lnd_shutdown)(ni);
2046 CDEBUG(D_LNI, "Removed LNI %s\n",
2047 libcfs_nid2str(ni->ni_nid));
2051 lnet_net_lock(LNET_LOCK_EX);
2055 /* shutdown down the NI and release refcount */
2057 lnet_shutdown_lndni(struct lnet_ni *ni)
2060 struct lnet_net *net = ni->ni_net;
2062 lnet_net_lock(LNET_LOCK_EX);
2064 ni->ni_state = LNET_NI_STATE_DELETING;
2066 lnet_ni_unlink_locked(ni);
2067 lnet_incr_dlc_seq();
2068 lnet_net_unlock(LNET_LOCK_EX);
2070 /* clear messages for this NI on the lazy portal */
2071 for (i = 0; i < the_lnet.ln_nportals; i++)
2072 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
2074 lnet_net_lock(LNET_LOCK_EX);
2075 lnet_clear_zombies_nis_locked(net);
2076 lnet_net_unlock(LNET_LOCK_EX);
2080 lnet_shutdown_lndnet(struct lnet_net *net)
2084 lnet_net_lock(LNET_LOCK_EX);
2086 net->net_state = LNET_NET_STATE_DELETING;
2088 list_del_init(&net->net_list);
2090 while (!list_empty(&net->net_ni_list)) {
2091 ni = list_entry(net->net_ni_list.next,
2092 struct lnet_ni, ni_netlist);
2093 lnet_net_unlock(LNET_LOCK_EX);
2094 lnet_shutdown_lndni(ni);
2095 lnet_net_lock(LNET_LOCK_EX);
2098 lnet_net_unlock(LNET_LOCK_EX);
2100 /* Do peer table cleanup for this net */
2101 lnet_peer_tables_cleanup(net);
2103 lnet_net_lock(LNET_LOCK_EX);
2105 * decrement ref count on lnd only when the entire network goes
2108 net->net_lnd->lnd_refcount--;
2110 lnet_net_unlock(LNET_LOCK_EX);
2116 lnet_shutdown_lndnets(void)
2118 struct lnet_net *net;
2119 struct list_head resend;
2120 struct lnet_msg *msg, *tmp;
2122 INIT_LIST_HEAD(&resend);
2124 /* NB called holding the global mutex */
2126 /* All quiet on the API front */
2127 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
2128 LASSERT(the_lnet.ln_refcount == 0);
2130 lnet_net_lock(LNET_LOCK_EX);
2131 the_lnet.ln_state = LNET_STATE_STOPPING;
2133 while (!list_empty(&the_lnet.ln_nets)) {
2135 * move the nets to the zombie list to avoid them being
2136 * picked up for new work. LONET is also included in the
2137 * Nets that will be moved to the zombie list
2139 net = list_entry(the_lnet.ln_nets.next,
2140 struct lnet_net, net_list);
2141 list_move(&net->net_list, &the_lnet.ln_net_zombie);
2144 /* Drop the cached loopback Net. */
2145 if (the_lnet.ln_loni != NULL) {
2146 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
2147 the_lnet.ln_loni = NULL;
2149 lnet_net_unlock(LNET_LOCK_EX);
2151 /* iterate through the net zombie list and delete each net */
2152 while (!list_empty(&the_lnet.ln_net_zombie)) {
2153 net = list_entry(the_lnet.ln_net_zombie.next,
2154 struct lnet_net, net_list);
2155 lnet_shutdown_lndnet(net);
2158 spin_lock(&the_lnet.ln_msg_resend_lock);
2159 list_splice(&the_lnet.ln_msg_resend, &resend);
2160 spin_unlock(&the_lnet.ln_msg_resend_lock);
2162 list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
2163 list_del_init(&msg->msg_list);
2164 msg->msg_no_resend = true;
2165 lnet_finalize(msg, -ECANCELED);
2168 lnet_net_lock(LNET_LOCK_EX);
2169 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
2170 lnet_net_unlock(LNET_LOCK_EX);
2174 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
2177 struct lnet_tx_queue *tq;
2179 struct lnet_net *net = ni->ni_net;
2181 mutex_lock(&the_lnet.ln_lnd_mutex);
2184 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
2185 ni->ni_lnd_tunables_set = true;
2188 rc = (net->net_lnd->lnd_startup)(ni);
2190 mutex_unlock(&the_lnet.ln_lnd_mutex);
2193 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
2194 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
2195 lnet_net_lock(LNET_LOCK_EX);
2196 net->net_lnd->lnd_refcount--;
2197 lnet_net_unlock(LNET_LOCK_EX);
2202 ni->ni_state = LNET_NI_STATE_ACTIVE;
2205 /* We keep a reference on the loopback net through the loopback NI */
2206 if (net->net_lnd->lnd_type == LOLND) {
2208 LASSERT(the_lnet.ln_loni == NULL);
2209 the_lnet.ln_loni = ni;
2210 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
2211 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
2212 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
2213 ni->ni_net->net_tunables.lct_peer_timeout = 0;
2217 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
2218 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
2219 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
2220 libcfs_lnd2str(net->net_lnd->lnd_type),
2221 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
2223 /* shutdown the NI since if we get here then it must've already
2226 lnet_shutdown_lndni(ni);
2230 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
2231 tq->tq_credits_min =
2232 tq->tq_credits_max =
2233 tq->tq_credits = lnet_ni_tq_credits(ni);
2236 atomic_set(&ni->ni_tx_credits,
2237 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
2238 atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
2240 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
2241 libcfs_nid2str(ni->ni_nid),
2242 ni->ni_net->net_tunables.lct_peer_tx_credits,
2243 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
2244 ni->ni_net->net_tunables.lct_peer_rtr_credits,
2245 ni->ni_net->net_tunables.lct_peer_timeout);
2254 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
2257 struct lnet_net *net_l = NULL;
2258 struct list_head local_ni_list;
2262 struct lnet_lnd *lnd;
2264 net->net_tunables.lct_peer_timeout;
2266 net->net_tunables.lct_max_tx_credits;
2267 int peerrtrcredits =
2268 net->net_tunables.lct_peer_rtr_credits;
2270 INIT_LIST_HEAD(&local_ni_list);
2273 * make sure that this net is unique. If it isn't then
2274 * we are adding interfaces to an already existing network, and
2275 * 'net' is just a convenient way to pass in the list.
2276 * if it is unique we need to find the LND and load it if
2279 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
2280 lnd_type = LNET_NETTYP(net->net_id);
2282 mutex_lock(&the_lnet.ln_lnd_mutex);
2283 lnd = lnet_find_lnd_by_type(lnd_type);
2286 mutex_unlock(&the_lnet.ln_lnd_mutex);
2287 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
2288 mutex_lock(&the_lnet.ln_lnd_mutex);
2290 lnd = lnet_find_lnd_by_type(lnd_type);
2292 mutex_unlock(&the_lnet.ln_lnd_mutex);
2293 CERROR("Can't load LND %s, module %s, rc=%d\n",
2294 libcfs_lnd2str(lnd_type),
2295 libcfs_lnd2modname(lnd_type), rc);
2296 #ifndef HAVE_MODULE_LOADING_SUPPORT
2297 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
2298 "compiled with kernel module "
2299 "loading support.");
2306 lnet_net_lock(LNET_LOCK_EX);
2307 lnd->lnd_refcount++;
2308 lnet_net_unlock(LNET_LOCK_EX);
2312 mutex_unlock(&the_lnet.ln_lnd_mutex);
2318 * net_l: if the network being added is unique then net_l
2319 * will point to that network
2320 * if the network being added is not unique then
2321 * net_l points to the existing network.
2323 * When we enter the loop below, we'll pick NIs off he
2324 * network beign added and start them up, then add them to
2325 * a local ni list. Once we've successfully started all
2326 * the NIs then we join the local NI list (of started up
2327 * networks) with the net_l->net_ni_list, which should
2328 * point to the correct network to add the new ni list to
2330 * If any of the new NIs fail to start up, then we want to
2331 * iterate through the local ni list, which should include
2332 * any NIs which were successfully started up, and shut
2335 * After than we want to delete the network being added,
2336 * to avoid a memory leak.
2340 * When a network uses TCP bonding then all its interfaces
2341 * must be specified when the network is first defined: the
2342 * TCP bonding code doesn't allow for interfaces to be added
2345 if (net_l != net && net_l != NULL && use_tcp_bonding &&
2346 LNET_NETTYP(net_l->net_id) == SOCKLND) {
2351 while (!list_empty(&net->net_ni_added)) {
2352 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
2354 list_del_init(&ni->ni_netlist);
2356 /* make sure that the the NI we're about to start
2357 * up is actually unique. if it's not fail. */
2358 if (!lnet_ni_unique_net(&net_l->net_ni_list,
2359 ni->ni_interfaces[0])) {
2364 /* adjust the pointer the parent network, just in case it
2365 * the net is a duplicate */
2368 rc = lnet_startup_lndni(ni, tun);
2370 LASSERT(ni->ni_net->net_tunables.lct_peer_timeout <= 0 ||
2371 ni->ni_net->net_lnd->lnd_query != NULL);
2377 list_add_tail(&ni->ni_netlist, &local_ni_list);
2382 lnet_net_lock(LNET_LOCK_EX);
2383 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
2384 lnet_incr_dlc_seq();
2385 lnet_net_unlock(LNET_LOCK_EX);
2387 /* if the network is not unique then we don't want to keep
2388 * it around after we're done. Free it. Otherwise add that
2389 * net to the global the_lnet.ln_nets */
2390 if (net_l != net && net_l != NULL) {
2392 * TODO - note. currently the tunables can not be updated
2397 net->net_state = LNET_NET_STATE_ACTIVE;
2399 * restore tunables after it has been overwitten by the
2402 if (peer_timeout != -1)
2403 net->net_tunables.lct_peer_timeout = peer_timeout;
2404 if (maxtxcredits != -1)
2405 net->net_tunables.lct_max_tx_credits = maxtxcredits;
2406 if (peerrtrcredits != -1)
2407 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
2409 lnet_net_lock(LNET_LOCK_EX);
2410 list_add_tail(&net->net_list, &the_lnet.ln_nets);
2411 lnet_net_unlock(LNET_LOCK_EX);
2414 /* update net count */
2415 lnet_current_net_count = lnet_get_net_count();
2421 * shutdown the new NIs that are being started up
2422 * free the NET being started
2424 while (!list_empty(&local_ni_list)) {
2425 ni = list_entry(local_ni_list.next, struct lnet_ni,
2428 lnet_shutdown_lndni(ni);
2438 lnet_startup_lndnets(struct list_head *netlist)
2440 struct lnet_net *net;
2445 * Change to running state before bringing up the LNDs. This
2446 * allows lnet_shutdown_lndnets() to assert that we've passed
2449 lnet_net_lock(LNET_LOCK_EX);
2450 the_lnet.ln_state = LNET_STATE_RUNNING;
2451 lnet_net_unlock(LNET_LOCK_EX);
2453 while (!list_empty(netlist)) {
2454 net = list_entry(netlist->next, struct lnet_net, net_list);
2455 list_del_init(&net->net_list);
2457 rc = lnet_startup_lndnet(net, NULL);
2467 lnet_shutdown_lndnets();
2473 * Initialize LNet library.
2475 * Automatically called at module loading time. Caller has to call
2476 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
2477 * latter returned 0. It must be called exactly once.
2479 * \retval 0 on success
2480 * \retval -ve on failures.
2482 int lnet_lib_init(void)
2486 lnet_assert_wire_constants();
2488 /* refer to global cfs_cpt_table for now */
2489 the_lnet.ln_cpt_table = cfs_cpt_table;
2490 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
2492 LASSERT(the_lnet.ln_cpt_number > 0);
2493 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
2494 /* we are under risk of consuming all lh_cookie */
2495 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
2496 "please change setting of CPT-table and retry\n",
2497 the_lnet.ln_cpt_number, LNET_CPT_MAX);
2501 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
2502 the_lnet.ln_cpt_bits++;
2504 rc = lnet_create_locks();
2506 CERROR("Can't create LNet global locks: %d\n", rc);
2510 the_lnet.ln_refcount = 0;
2511 INIT_LIST_HEAD(&the_lnet.ln_lnds);
2512 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
2513 INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
2515 /* The hash table size is the number of bits it takes to express the set
2516 * ln_num_routes, minus 1 (better to under estimate than over so we
2517 * don't waste memory). */
2518 if (rnet_htable_size <= 0)
2519 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
2520 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
2521 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
2522 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
2523 order_base_2(rnet_htable_size) - 1);
2525 /* All LNDs apart from the LOLND are in separate modules. They
2526 * register themselves when their module loads, and unregister
2527 * themselves when their module is unloaded. */
2528 lnet_register_lnd(&the_lolnd);
2533 * Finalize LNet library.
2535 * \pre lnet_lib_init() called with success.
2536 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
2538 void lnet_lib_exit(void)
2540 LASSERT(the_lnet.ln_refcount == 0);
2542 while (!list_empty(&the_lnet.ln_lnds))
2543 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
2544 struct lnet_lnd, lnd_list));
2545 lnet_destroy_locks();
2549 * Set LNet PID and start LNet interfaces, routing, and forwarding.
2551 * Users must call this function at least once before any other functions.
2552 * For each successful call there must be a corresponding call to
2553 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
2556 * The PID used by LNet may be different from the one requested.
2559 * \param requested_pid PID requested by the caller.
2561 * \return >= 0 on success, and < 0 error code on failures.
2564 LNetNIInit(lnet_pid_t requested_pid)
2566 int im_a_router = 0;
2569 struct lnet_ping_buffer *pbuf;
2570 struct lnet_handle_md ping_mdh;
2571 struct list_head net_head;
2572 struct lnet_net *net;
2574 INIT_LIST_HEAD(&net_head);
2576 mutex_lock(&the_lnet.ln_api_mutex);
2578 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
2580 if (the_lnet.ln_refcount > 0) {
2581 rc = the_lnet.ln_refcount++;
2582 mutex_unlock(&the_lnet.ln_api_mutex);
2586 rc = lnet_prepare(requested_pid);
2588 mutex_unlock(&the_lnet.ln_api_mutex);
2592 /* create a network for Loopback network */
2593 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
2596 goto err_empty_list;
2599 /* Add in the loopback NI */
2600 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
2602 goto err_empty_list;
2605 /* If LNet is being initialized via DLC it is possible
2606 * that the user requests not to load module parameters (ones which
2607 * are supported by DLC) on initialization. Therefore, make sure not
2608 * to load networks, routes and forwarding from module parameters
2609 * in this case. On cleanup in case of failure only clean up
2610 * routes if it has been loaded */
2611 if (!the_lnet.ln_nis_from_mod_params) {
2612 rc = lnet_parse_networks(&net_head, lnet_get_networks(),
2615 goto err_empty_list;
2618 ni_count = lnet_startup_lndnets(&net_head);
2621 goto err_empty_list;
2624 if (!the_lnet.ln_nis_from_mod_params) {
2625 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
2627 goto err_shutdown_lndnis;
2629 rc = lnet_rtrpools_alloc(im_a_router);
2631 goto err_destroy_routes;
2634 rc = lnet_acceptor_start();
2636 goto err_destroy_routes;
2638 the_lnet.ln_refcount = 1;
2639 /* Now I may use my own API functions... */
2641 rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_count, true);
2643 goto err_acceptor_stop;
2645 lnet_ping_target_update(pbuf, ping_mdh);
2647 rc = LNetEQAlloc(0, lnet_mt_event_handler, &the_lnet.ln_mt_eqh);
2649 CERROR("Can't allocate monitor thread EQ: %d\n", rc);
2653 rc = lnet_push_target_init();
2657 rc = lnet_peer_discovery_start();
2659 goto err_destroy_push_target;
2661 rc = lnet_monitor_thr_start();
2663 goto err_stop_discovery_thr;
2666 lnet_router_debugfs_init();
2668 mutex_unlock(&the_lnet.ln_api_mutex);
2670 complete_all(&the_lnet.ln_started);
2672 /* wait for all routers to start */
2673 lnet_wait_router_start();
2677 err_stop_discovery_thr:
2678 lnet_peer_discovery_stop();
2679 err_destroy_push_target:
2680 lnet_push_target_fini();
2682 lnet_ping_target_fini();
2684 the_lnet.ln_refcount = 0;
2685 lnet_acceptor_stop();
2687 if (!the_lnet.ln_nis_from_mod_params)
2688 lnet_destroy_routes();
2689 err_shutdown_lndnis:
2690 lnet_shutdown_lndnets();
2694 mutex_unlock(&the_lnet.ln_api_mutex);
2695 while (!list_empty(&net_head)) {
2696 struct lnet_net *net;
2698 net = list_entry(net_head.next, struct lnet_net, net_list);
2699 list_del_init(&net->net_list);
2704 EXPORT_SYMBOL(LNetNIInit);
2707 * Stop LNet interfaces, routing, and forwarding.
2709 * Users must call this function once for each successful call to LNetNIInit().
2710 * Once the LNetNIFini() operation has been started, the results of pending
2711 * API operations are undefined.
2713 * \return always 0 for current implementation.
2718 mutex_lock(&the_lnet.ln_api_mutex);
2720 LASSERT(the_lnet.ln_refcount > 0);
2722 if (the_lnet.ln_refcount != 1) {
2723 the_lnet.ln_refcount--;
2725 LASSERT(!the_lnet.ln_niinit_self);
2729 lnet_router_debugfs_fini();
2730 lnet_monitor_thr_stop();
2731 lnet_peer_discovery_stop();
2732 lnet_push_target_fini();
2733 lnet_ping_target_fini();
2735 /* Teardown fns that use my own API functions BEFORE here */
2736 the_lnet.ln_refcount = 0;
2738 lnet_acceptor_stop();
2739 lnet_destroy_routes();
2740 lnet_shutdown_lndnets();
2744 mutex_unlock(&the_lnet.ln_api_mutex);
2747 EXPORT_SYMBOL(LNetNIFini);
2750 * Grabs the ni data from the ni structure and fills the out
2753 * \param[in] ni network interface structure
2754 * \param[out] cfg_ni NI config information
2755 * \param[out] tun network and LND tunables
2758 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
2759 struct lnet_ioctl_config_lnd_tunables *tun,
2760 struct lnet_ioctl_element_stats *stats,
2763 size_t min_size = 0;
2766 if (!ni || !cfg_ni || !tun)
2769 if (ni->ni_interfaces[0] != NULL) {
2770 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2771 if (ni->ni_interfaces[i] != NULL) {
2772 strncpy(cfg_ni->lic_ni_intf[i],
2773 ni->ni_interfaces[i],
2774 sizeof(cfg_ni->lic_ni_intf[i]));
2779 cfg_ni->lic_nid = ni->ni_nid;
2780 if (LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND)
2781 cfg_ni->lic_status = LNET_NI_STATUS_UP;
2783 cfg_ni->lic_status = ni->ni_status->ns_status;
2784 cfg_ni->lic_tcp_bonding = use_tcp_bonding;
2785 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
2787 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
2790 stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
2791 LNET_STATS_TYPE_SEND);
2792 stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
2793 LNET_STATS_TYPE_RECV);
2794 stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
2795 LNET_STATS_TYPE_DROP);
2799 * tun->lt_tun will always be present, but in order to be
2800 * backwards compatible, we need to deal with the cases when
2801 * tun->lt_tun is smaller than what the kernel has, because it
2802 * comes from an older version of a userspace program, then we'll
2803 * need to copy as much information as we have available space.
2805 min_size = tun_size - sizeof(tun->lt_cmn);
2806 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
2808 /* copy over the cpts */
2809 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
2810 ni->ni_cpts == NULL) {
2811 for (i = 0; i < ni->ni_ncpts; i++)
2812 cfg_ni->lic_cpts[i] = i;
2815 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
2816 i < LNET_MAX_SHOW_NUM_CPT;
2818 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
2820 cfg_ni->lic_ncpts = ni->ni_ncpts;
2824 * NOTE: This is a legacy function left in the code to be backwards
2825 * compatible with older userspace programs. It should eventually be
2828 * Grabs the ni data from the ni structure and fills the out
2831 * \param[in] ni network interface structure
2832 * \param[out] config config information
2835 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
2836 struct lnet_ioctl_config_data *config)
2838 struct lnet_ioctl_net_config *net_config;
2839 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
2840 size_t min_size, tunable_size = 0;
2846 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
2850 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
2851 ARRAY_SIZE(net_config->ni_interfaces));
2853 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2854 if (!ni->ni_interfaces[i])
2857 strncpy(net_config->ni_interfaces[i],
2858 ni->ni_interfaces[i],
2859 sizeof(net_config->ni_interfaces[i]));
2862 config->cfg_nid = ni->ni_nid;
2863 config->cfg_config_u.cfg_net.net_peer_timeout =
2864 ni->ni_net->net_tunables.lct_peer_timeout;
2865 config->cfg_config_u.cfg_net.net_max_tx_credits =
2866 ni->ni_net->net_tunables.lct_max_tx_credits;
2867 config->cfg_config_u.cfg_net.net_peer_tx_credits =
2868 ni->ni_net->net_tunables.lct_peer_tx_credits;
2869 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
2870 ni->ni_net->net_tunables.lct_peer_rtr_credits;
2872 if (LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND)
2873 net_config->ni_status = LNET_NI_STATUS_UP;
2875 net_config->ni_status = ni->ni_status->ns_status;
2878 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
2880 for (i = 0; i < num_cpts; i++)
2881 net_config->ni_cpts[i] = ni->ni_cpts[i];
2883 config->cfg_ncpts = num_cpts;
2887 * See if user land tools sent in a newer and larger version
2888 * of struct lnet_tunables than what the kernel uses.
2890 min_size = sizeof(*config) + sizeof(*net_config);
2892 if (config->cfg_hdr.ioc_len > min_size)
2893 tunable_size = config->cfg_hdr.ioc_len - min_size;
2895 /* Don't copy too much data to user space */
2896 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
2897 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
2899 if (lnd_cfg && min_size) {
2900 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
2901 config->cfg_config_u.cfg_net.net_interface_count = 1;
2903 /* Tell user land that kernel side has less data */
2904 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
2905 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
2906 config->cfg_hdr.ioc_len -= min_size;
2912 lnet_get_ni_idx_locked(int idx)
2915 struct lnet_net *net;
2917 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
2918 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
2928 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
2931 struct lnet_net *net = mynet;
2934 * It is possible that the net has been cleaned out while there is
2935 * a message being sent. This function accessed the net without
2936 * checking if the list is empty
2940 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
2942 if (list_empty(&net->net_ni_list))
2944 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2950 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
2951 /* if you reached the end of the ni list and the net is
2952 * specified, then there are no more nis in that net */
2956 /* we reached the end of this net ni list. move to the
2958 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
2959 /* no more nets and no more NIs. */
2962 /* get the next net */
2963 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
2965 if (list_empty(&net->net_ni_list))
2967 /* get the ni on it */
2968 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2974 if (list_empty(&prev->ni_netlist))
2977 /* there are more nis left */
2978 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
2984 lnet_get_net_config(struct lnet_ioctl_config_data *config)
2989 int idx = config->cfg_count;
2991 cpt = lnet_net_lock_current();
2993 ni = lnet_get_ni_idx_locked(idx);
2998 lnet_fill_ni_info_legacy(ni, config);
3002 lnet_net_unlock(cpt);
3007 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
3008 struct lnet_ioctl_config_lnd_tunables *tun,
3009 struct lnet_ioctl_element_stats *stats,
3016 if (!cfg_ni || !tun || !stats)
3019 cpt = lnet_net_lock_current();
3021 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
3026 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
3030 lnet_net_unlock(cpt);
3034 int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
3043 cpt = lnet_net_lock_current();
3045 ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
3048 lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
3052 lnet_net_unlock(cpt);
3057 static int lnet_add_net_common(struct lnet_net *net,
3058 struct lnet_ioctl_config_lnd_tunables *tun)
3061 struct lnet_ping_buffer *pbuf;
3062 struct lnet_handle_md ping_mdh;
3064 struct lnet_remotenet *rnet;
3066 int num_acceptor_nets;
3068 lnet_net_lock(LNET_LOCK_EX);
3069 rnet = lnet_find_rnet_locked(net->net_id);
3070 lnet_net_unlock(LNET_LOCK_EX);
3072 * make sure that the net added doesn't invalidate the current
3073 * configuration LNet is keeping
3076 CERROR("Adding net %s will invalidate routing configuration\n",
3077 libcfs_net2str(net->net_id));
3083 * make sure you calculate the correct number of slots in the ping
3084 * buffer. Since the ping info is a flattened list of all the NIs,
3085 * we should allocate enough slots to accomodate the number of NIs
3086 * which will be added.
3088 * since ni hasn't been configured yet, use
3089 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
3091 net_ni_count = lnet_get_net_ni_count_pre(net);
3093 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3094 net_ni_count + lnet_get_ni_count(),
3102 memcpy(&net->net_tunables,
3103 &tun->lt_cmn, sizeof(net->net_tunables));
3105 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
3108 * before starting this network get a count of the current TCP
3109 * networks which require the acceptor thread running. If that
3110 * count is == 0 before we start up this network, then we'd want to
3111 * start up the acceptor thread after starting up this network
3113 num_acceptor_nets = lnet_count_acceptor_nets();
3115 net_id = net->net_id;
3117 rc = lnet_startup_lndnet(net,
3118 (tun) ? &tun->lt_tun : NULL);
3122 lnet_net_lock(LNET_LOCK_EX);
3123 net = lnet_get_net_locked(net_id);
3124 lnet_net_unlock(LNET_LOCK_EX);
3129 * Start the acceptor thread if this is the first network
3130 * being added that requires the thread.
3132 if (net->net_lnd->lnd_accept && num_acceptor_nets == 0) {
3133 rc = lnet_acceptor_start();
3135 /* shutdown the net that we just started */
3136 CERROR("Failed to start up acceptor thread\n");
3137 lnet_shutdown_lndnet(net);
3142 lnet_net_lock(LNET_LOCK_EX);
3143 lnet_peer_net_added(net);
3144 lnet_net_unlock(LNET_LOCK_EX);
3146 lnet_ping_target_update(pbuf, ping_mdh);
3151 lnet_ping_md_unlink(pbuf, &ping_mdh);
3152 lnet_ping_buffer_decref(pbuf);
3156 static int lnet_handle_legacy_ip2nets(char *ip2nets,
3157 struct lnet_ioctl_config_lnd_tunables *tun)
3159 struct lnet_net *net;
3162 struct list_head net_head;
3164 INIT_LIST_HEAD(&net_head);
3166 rc = lnet_parse_ip2nets(&nets, ip2nets);
3170 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
3174 mutex_lock(&the_lnet.ln_api_mutex);
3175 while (!list_empty(&net_head)) {
3176 net = list_entry(net_head.next, struct lnet_net, net_list);
3177 list_del_init(&net->net_list);
3178 rc = lnet_add_net_common(net, tun);
3184 mutex_unlock(&the_lnet.ln_api_mutex);
3186 while (!list_empty(&net_head)) {
3187 net = list_entry(net_head.next, struct lnet_net, net_list);
3188 list_del_init(&net->net_list);
3194 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
3196 struct lnet_net *net;
3198 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3200 __u32 net_id, lnd_type;
3202 /* get the tunables if they are available */
3203 if (conf->lic_cfg_hdr.ioc_len >=
3204 sizeof(*conf) + sizeof(*tun))
3205 tun = (struct lnet_ioctl_config_lnd_tunables *)
3208 /* handle legacy ip2nets from DLC */
3209 if (conf->lic_legacy_ip2nets[0] != '\0')
3210 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
3213 net_id = LNET_NIDNET(conf->lic_nid);
3214 lnd_type = LNET_NETTYP(net_id);
3216 if (!libcfs_isknown_lnd(lnd_type)) {
3217 CERROR("No valid net and lnd information provided\n");
3221 net = lnet_net_alloc(net_id, NULL);
3225 for (i = 0; i < conf->lic_ncpts; i++) {
3226 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
3230 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
3231 conf->lic_ni_intf[0]);
3235 mutex_lock(&the_lnet.ln_api_mutex);
3237 rc = lnet_add_net_common(net, tun);
3239 mutex_unlock(&the_lnet.ln_api_mutex);
3244 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
3246 struct lnet_net *net;
3248 __u32 net_id = LNET_NIDNET(conf->lic_nid);
3249 struct lnet_ping_buffer *pbuf;
3250 struct lnet_handle_md ping_mdh;
3255 /* don't allow userspace to shutdown the LOLND */
3256 if (LNET_NETTYP(net_id) == LOLND)
3259 mutex_lock(&the_lnet.ln_api_mutex);
3263 net = lnet_get_net_locked(net_id);
3265 CERROR("net %s not found\n",
3266 libcfs_net2str(net_id));
3271 addr = LNET_NIDADDR(conf->lic_nid);
3273 /* remove the entire net */
3274 net_count = lnet_get_net_ni_count_locked(net);
3278 /* create and link a new ping info, before removing the old one */
3279 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3280 lnet_get_ni_count() - net_count,
3283 goto unlock_api_mutex;
3285 lnet_shutdown_lndnet(net);
3287 if (lnet_count_acceptor_nets() == 0)
3288 lnet_acceptor_stop();
3290 lnet_ping_target_update(pbuf, ping_mdh);
3292 goto unlock_api_mutex;
3295 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
3297 CERROR("nid %s not found\n",
3298 libcfs_nid2str(conf->lic_nid));
3303 net_count = lnet_get_net_ni_count_locked(net);
3307 /* create and link a new ping info, before removing the old one */
3308 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3309 lnet_get_ni_count() - 1, false);
3311 goto unlock_api_mutex;
3313 lnet_shutdown_lndni(ni);
3315 if (lnet_count_acceptor_nets() == 0)
3316 lnet_acceptor_stop();
3318 lnet_ping_target_update(pbuf, ping_mdh);
3320 /* check if the net is empty and remove it if it is */
3322 lnet_shutdown_lndnet(net);
3324 goto unlock_api_mutex;
3329 mutex_unlock(&the_lnet.ln_api_mutex);
3335 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
3336 * They are only expected to be called for unique networks.
3337 * That can be as a result of older DLC library
3338 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
3341 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
3343 struct lnet_net *net;
3344 struct list_head net_head;
3346 struct lnet_ioctl_config_lnd_tunables tun;
3347 char *nets = conf->cfg_config_u.cfg_net.net_intf;
3349 INIT_LIST_HEAD(&net_head);
3351 /* Create a net/ni structures for the network string */
3352 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
3354 return rc == 0 ? -EINVAL : rc;
3356 mutex_lock(&the_lnet.ln_api_mutex);
3359 rc = -EINVAL; /* only add one network per call */
3360 goto out_unlock_clean;
3363 net = list_entry(net_head.next, struct lnet_net, net_list);
3364 list_del_init(&net->net_list);
3366 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
3368 memset(&tun, 0, sizeof(tun));
3370 tun.lt_cmn.lct_peer_timeout =
3371 conf->cfg_config_u.cfg_net.net_peer_timeout;
3372 tun.lt_cmn.lct_peer_tx_credits =
3373 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
3374 tun.lt_cmn.lct_peer_rtr_credits =
3375 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
3376 tun.lt_cmn.lct_max_tx_credits =
3377 conf->cfg_config_u.cfg_net.net_max_tx_credits;
3379 rc = lnet_add_net_common(net, &tun);
3382 mutex_unlock(&the_lnet.ln_api_mutex);
3383 while (!list_empty(&net_head)) {
3384 /* net_head list is empty in success case */
3385 net = list_entry(net_head.next, struct lnet_net, net_list);
3386 list_del_init(&net->net_list);
3393 lnet_dyn_del_net(__u32 net_id)
3395 struct lnet_net *net;
3396 struct lnet_ping_buffer *pbuf;
3397 struct lnet_handle_md ping_mdh;
3401 /* don't allow userspace to shutdown the LOLND */
3402 if (LNET_NETTYP(net_id) == LOLND)
3405 mutex_lock(&the_lnet.ln_api_mutex);
3409 net = lnet_get_net_locked(net_id);
3416 net_ni_count = lnet_get_net_ni_count_locked(net);
3420 /* create and link a new ping info, before removing the old one */
3421 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3422 lnet_get_ni_count() - net_ni_count, false);
3426 lnet_shutdown_lndnet(net);
3428 if (lnet_count_acceptor_nets() == 0)
3429 lnet_acceptor_stop();
3431 lnet_ping_target_update(pbuf, ping_mdh);
3434 mutex_unlock(&the_lnet.ln_api_mutex);
3439 void lnet_incr_dlc_seq(void)
3441 atomic_inc(&lnet_dlc_seq_no);
3444 __u32 lnet_get_dlc_seq_locked(void)
3446 return atomic_read(&lnet_dlc_seq_no);
3450 lnet_ni_set_healthv(lnet_nid_t nid, int value, bool all)
3452 struct lnet_net *net;
3455 lnet_net_lock(LNET_LOCK_EX);
3456 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3457 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3458 if (ni->ni_nid == nid || all) {
3459 atomic_set(&ni->ni_healthv, value);
3460 if (list_empty(&ni->ni_recovery) &&
3461 value < LNET_MAX_HEALTH_VALUE) {
3462 CERROR("manually adding local NI %s to recovery\n",
3463 libcfs_nid2str(ni->ni_nid));
3464 list_add_tail(&ni->ni_recovery,
3465 &the_lnet.ln_mt_localNIRecovq);
3466 lnet_ni_addref_locked(ni, 0);
3469 lnet_net_unlock(LNET_LOCK_EX);
3475 lnet_net_unlock(LNET_LOCK_EX);
3479 lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
3483 lnet_nid_t nid = stats->hlni_nid;
3485 cpt = lnet_net_lock_current();
3486 ni = lnet_nid2ni_locked(nid, cpt);
3493 stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
3494 stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
3495 stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
3496 stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
3497 stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
3498 stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
3499 stats->hlni_health_value = atomic_read(&ni->ni_healthv);
3502 lnet_net_unlock(cpt);
3508 lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3513 lnet_net_lock(LNET_LOCK_EX);
3514 list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
3515 list->rlst_nid_array[i] = ni->ni_nid;
3517 if (i >= LNET_MAX_SHOW_NUM_NID)
3520 lnet_net_unlock(LNET_LOCK_EX);
3521 list->rlst_num_nids = i;
3527 lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3529 struct lnet_peer_ni *lpni;
3532 lnet_net_lock(LNET_LOCK_EX);
3533 list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
3534 list->rlst_nid_array[i] = lpni->lpni_nid;
3536 if (i >= LNET_MAX_SHOW_NUM_NID)
3539 lnet_net_unlock(LNET_LOCK_EX);
3540 list->rlst_num_nids = i;
3546 * LNet ioctl handler.
3550 LNetCtl(unsigned int cmd, void *arg)
3552 struct libcfs_ioctl_data *data = arg;
3553 struct lnet_ioctl_config_data *config;
3554 struct lnet_process_id id = {0};
3558 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
3559 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
3562 case IOC_LIBCFS_GET_NI:
3563 rc = LNetGetId(data->ioc_count, &id);
3564 data->ioc_nid = id.nid;
3567 case IOC_LIBCFS_FAIL_NID:
3568 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
3570 case IOC_LIBCFS_ADD_ROUTE: {
3571 /* default router sensitivity to 1 */
3572 unsigned int sensitivity = 1;
3575 if (config->cfg_hdr.ioc_len < sizeof(*config))
3578 if (config->cfg_config_u.cfg_route.rtr_sensitivity) {
3580 config->cfg_config_u.cfg_route.rtr_sensitivity;
3583 mutex_lock(&the_lnet.ln_api_mutex);
3584 rc = lnet_add_route(config->cfg_net,
3585 config->cfg_config_u.cfg_route.rtr_hop,
3587 config->cfg_config_u.cfg_route.
3588 rtr_priority, sensitivity);
3589 mutex_unlock(&the_lnet.ln_api_mutex);
3593 case IOC_LIBCFS_DEL_ROUTE:
3596 if (config->cfg_hdr.ioc_len < sizeof(*config))
3599 mutex_lock(&the_lnet.ln_api_mutex);
3600 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
3601 mutex_unlock(&the_lnet.ln_api_mutex);
3604 case IOC_LIBCFS_GET_ROUTE:
3607 if (config->cfg_hdr.ioc_len < sizeof(*config))
3610 mutex_lock(&the_lnet.ln_api_mutex);
3611 rc = lnet_get_route(config->cfg_count,
3613 &config->cfg_config_u.cfg_route.rtr_hop,
3615 &config->cfg_config_u.cfg_route.rtr_flags,
3616 &config->cfg_config_u.cfg_route.
3618 &config->cfg_config_u.cfg_route.
3620 mutex_unlock(&the_lnet.ln_api_mutex);
3623 case IOC_LIBCFS_GET_LOCAL_NI: {
3624 struct lnet_ioctl_config_ni *cfg_ni;
3625 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3626 struct lnet_ioctl_element_stats *stats;
3631 /* get the tunables if they are available */
3632 if (cfg_ni->lic_cfg_hdr.ioc_len <
3633 sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
3636 stats = (struct lnet_ioctl_element_stats *)
3638 tun = (struct lnet_ioctl_config_lnd_tunables *)
3639 (cfg_ni->lic_bulk + sizeof(*stats));
3641 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
3644 mutex_lock(&the_lnet.ln_api_mutex);
3645 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
3646 mutex_unlock(&the_lnet.ln_api_mutex);
3650 case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
3651 struct lnet_ioctl_element_msg_stats *msg_stats = arg;
3653 if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
3656 mutex_lock(&the_lnet.ln_api_mutex);
3657 rc = lnet_get_ni_stats(msg_stats);
3658 mutex_unlock(&the_lnet.ln_api_mutex);
3663 case IOC_LIBCFS_GET_NET: {
3664 size_t total = sizeof(*config) +
3665 sizeof(struct lnet_ioctl_net_config);
3668 if (config->cfg_hdr.ioc_len < total)
3671 mutex_lock(&the_lnet.ln_api_mutex);
3672 rc = lnet_get_net_config(config);
3673 mutex_unlock(&the_lnet.ln_api_mutex);
3677 case IOC_LIBCFS_GET_LNET_STATS:
3679 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
3681 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
3684 mutex_lock(&the_lnet.ln_api_mutex);
3685 lnet_counters_get(&lnet_stats->st_cntrs);
3686 mutex_unlock(&the_lnet.ln_api_mutex);
3690 case IOC_LIBCFS_CONFIG_RTR:
3693 if (config->cfg_hdr.ioc_len < sizeof(*config))
3696 mutex_lock(&the_lnet.ln_api_mutex);
3697 if (config->cfg_config_u.cfg_buffers.buf_enable) {
3698 rc = lnet_rtrpools_enable();
3699 mutex_unlock(&the_lnet.ln_api_mutex);
3702 lnet_rtrpools_disable();
3703 mutex_unlock(&the_lnet.ln_api_mutex);
3706 case IOC_LIBCFS_ADD_BUF:
3709 if (config->cfg_hdr.ioc_len < sizeof(*config))
3712 mutex_lock(&the_lnet.ln_api_mutex);
3713 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
3715 config->cfg_config_u.cfg_buffers.
3717 config->cfg_config_u.cfg_buffers.
3719 mutex_unlock(&the_lnet.ln_api_mutex);
3722 case IOC_LIBCFS_SET_NUMA_RANGE: {
3723 struct lnet_ioctl_set_value *numa;
3725 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3727 lnet_net_lock(LNET_LOCK_EX);
3728 lnet_numa_range = numa->sv_value;
3729 lnet_net_unlock(LNET_LOCK_EX);
3733 case IOC_LIBCFS_GET_NUMA_RANGE: {
3734 struct lnet_ioctl_set_value *numa;
3736 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3738 numa->sv_value = lnet_numa_range;
3742 case IOC_LIBCFS_GET_BUF: {
3743 struct lnet_ioctl_pool_cfg *pool_cfg;
3744 size_t total = sizeof(*config) + sizeof(*pool_cfg);
3748 if (config->cfg_hdr.ioc_len < total)
3751 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
3753 mutex_lock(&the_lnet.ln_api_mutex);
3754 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
3755 mutex_unlock(&the_lnet.ln_api_mutex);
3759 case IOC_LIBCFS_GET_LOCAL_HSTATS: {
3760 struct lnet_ioctl_local_ni_hstats *stats = arg;
3762 if (stats->hlni_hdr.ioc_len < sizeof(*stats))
3765 mutex_lock(&the_lnet.ln_api_mutex);
3766 rc = lnet_get_local_ni_hstats(stats);
3767 mutex_unlock(&the_lnet.ln_api_mutex);
3772 case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
3773 struct lnet_ioctl_recovery_list *list = arg;
3774 if (list->rlst_hdr.ioc_len < sizeof(*list))
3777 mutex_lock(&the_lnet.ln_api_mutex);
3778 if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
3779 rc = lnet_get_local_ni_recovery_list(list);
3781 rc = lnet_get_peer_ni_recovery_list(list);
3782 mutex_unlock(&the_lnet.ln_api_mutex);
3786 case IOC_LIBCFS_ADD_PEER_NI: {
3787 struct lnet_ioctl_peer_cfg *cfg = arg;
3789 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3792 mutex_lock(&the_lnet.ln_api_mutex);
3793 rc = lnet_add_peer_ni(cfg->prcfg_prim_nid,
3796 mutex_unlock(&the_lnet.ln_api_mutex);
3800 case IOC_LIBCFS_DEL_PEER_NI: {
3801 struct lnet_ioctl_peer_cfg *cfg = arg;
3803 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3806 mutex_lock(&the_lnet.ln_api_mutex);
3807 rc = lnet_del_peer_ni(cfg->prcfg_prim_nid,
3808 cfg->prcfg_cfg_nid);
3809 mutex_unlock(&the_lnet.ln_api_mutex);
3813 case IOC_LIBCFS_GET_PEER_INFO: {
3814 struct lnet_ioctl_peer *peer_info = arg;
3816 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
3819 mutex_lock(&the_lnet.ln_api_mutex);
3820 rc = lnet_get_peer_ni_info(
3821 peer_info->pr_count,
3823 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
3824 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
3825 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
3826 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
3827 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
3828 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
3829 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
3830 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
3831 mutex_unlock(&the_lnet.ln_api_mutex);
3835 case IOC_LIBCFS_GET_PEER_NI: {
3836 struct lnet_ioctl_peer_cfg *cfg = arg;
3838 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3841 mutex_lock(&the_lnet.ln_api_mutex);
3842 rc = lnet_get_peer_info(cfg,
3843 (void __user *)cfg->prcfg_bulk);
3844 mutex_unlock(&the_lnet.ln_api_mutex);
3848 case IOC_LIBCFS_GET_PEER_LIST: {
3849 struct lnet_ioctl_peer_cfg *cfg = arg;
3851 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3854 mutex_lock(&the_lnet.ln_api_mutex);
3855 rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
3856 (struct lnet_process_id __user *)cfg->prcfg_bulk);
3857 mutex_unlock(&the_lnet.ln_api_mutex);
3861 case IOC_LIBCFS_SET_HEALHV: {
3862 struct lnet_ioctl_reset_health_cfg *cfg = arg;
3864 if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
3866 if (cfg->rh_value < 0 ||
3867 cfg->rh_value > LNET_MAX_HEALTH_VALUE)
3868 value = LNET_MAX_HEALTH_VALUE;
3870 value = cfg->rh_value;
3871 CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
3872 value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
3873 "local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
3874 mutex_lock(&the_lnet.ln_api_mutex);
3875 if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI)
3876 lnet_ni_set_healthv(cfg->rh_nid, value,
3879 lnet_peer_ni_set_healthv(cfg->rh_nid, value,
3881 mutex_unlock(&the_lnet.ln_api_mutex);
3885 case IOC_LIBCFS_NOTIFY_ROUTER: {
3886 time64_t deadline = ktime_get_real_seconds() - data->ioc_u64[0];
3888 /* The deadline passed in by the user should be some time in
3889 * seconds in the future since the UNIX epoch. We have to map
3890 * that deadline to the wall clock.
3892 deadline += ktime_get_seconds();
3893 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, false,
3897 case IOC_LIBCFS_LNET_DIST:
3898 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
3899 if (rc < 0 && rc != -EHOSTUNREACH)
3902 data->ioc_u32[0] = rc;
3905 case IOC_LIBCFS_TESTPROTOCOMPAT:
3906 lnet_net_lock(LNET_LOCK_EX);
3907 the_lnet.ln_testprotocompat = data->ioc_flags;
3908 lnet_net_unlock(LNET_LOCK_EX);
3911 case IOC_LIBCFS_LNET_FAULT:
3912 return lnet_fault_ctl(data->ioc_flags, data);
3914 case IOC_LIBCFS_PING: {
3915 signed long timeout;
3917 id.nid = data->ioc_nid;
3918 id.pid = data->ioc_u32[0];
3920 /* If timeout is negative then set default of 3 minutes */
3921 if (((s32)data->ioc_u32[1] <= 0) ||
3922 data->ioc_u32[1] > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
3923 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
3925 timeout = nsecs_to_jiffies(data->ioc_u32[1] * NSEC_PER_MSEC);
3927 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
3928 data->ioc_plen1 / sizeof(struct lnet_process_id));
3933 data->ioc_count = rc;
3937 case IOC_LIBCFS_PING_PEER: {
3938 struct lnet_ioctl_ping_data *ping = arg;
3939 struct lnet_peer *lp;
3940 signed long timeout;
3942 /* If timeout is negative then set default of 3 minutes */
3943 if (((s32)ping->op_param) <= 0 ||
3944 ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
3945 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
3947 timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
3949 rc = lnet_ping(ping->ping_id, timeout,
3955 mutex_lock(&the_lnet.ln_api_mutex);
3956 lp = lnet_find_peer(ping->ping_id.nid);
3958 ping->ping_id.nid = lp->lp_primary_nid;
3959 ping->mr_info = lnet_peer_is_multi_rail(lp);
3960 lnet_peer_decref_locked(lp);
3962 mutex_unlock(&the_lnet.ln_api_mutex);
3964 ping->ping_count = rc;
3968 case IOC_LIBCFS_DISCOVER: {
3969 struct lnet_ioctl_ping_data *discover = arg;
3970 struct lnet_peer *lp;
3972 rc = lnet_discover(discover->ping_id, discover->op_param,
3974 discover->ping_count);
3978 mutex_lock(&the_lnet.ln_api_mutex);
3979 lp = lnet_find_peer(discover->ping_id.nid);
3981 discover->ping_id.nid = lp->lp_primary_nid;
3982 discover->mr_info = lnet_peer_is_multi_rail(lp);
3983 lnet_peer_decref_locked(lp);
3985 mutex_unlock(&the_lnet.ln_api_mutex);
3987 discover->ping_count = rc;
3992 ni = lnet_net2ni_addref(data->ioc_net);
3996 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
3999 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
4006 EXPORT_SYMBOL(LNetCtl);
4008 void LNetDebugPeer(struct lnet_process_id id)
4010 lnet_debug_peer(id.nid);
4012 EXPORT_SYMBOL(LNetDebugPeer);
4015 * Determine if the specified peer \a nid is on the local node.
4017 * \param nid peer nid to check
4019 * \retval true If peer NID is on the local node.
4020 * \retval false If peer NID is not on the local node.
4022 bool LNetIsPeerLocal(lnet_nid_t nid)
4024 struct lnet_net *net;
4028 cpt = lnet_net_lock_current();
4029 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4030 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4031 if (ni->ni_nid == nid) {
4032 lnet_net_unlock(cpt);
4037 lnet_net_unlock(cpt);
4041 EXPORT_SYMBOL(LNetIsPeerLocal);
4044 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
4045 * Note that all interfaces share a same PID, as requested by LNetNIInit().
4047 * \param index Index of the interface to look up.
4048 * \param id On successful return, this location will hold the
4049 * struct lnet_process_id ID of the interface.
4051 * \retval 0 If an interface exists at \a index.
4052 * \retval -ENOENT If no interface has been found.
4055 LNetGetId(unsigned int index, struct lnet_process_id *id)
4058 struct lnet_net *net;
4062 LASSERT(the_lnet.ln_refcount > 0);
4064 cpt = lnet_net_lock_current();
4066 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4067 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4071 id->nid = ni->ni_nid;
4072 id->pid = the_lnet.ln_pid;
4078 lnet_net_unlock(cpt);
4081 EXPORT_SYMBOL(LNetGetId);
4083 static int lnet_ping(struct lnet_process_id id, signed long timeout,
4084 struct lnet_process_id __user *ids, int n_ids)
4086 struct lnet_handle_eq eqh;
4087 struct lnet_handle_md mdh;
4088 struct lnet_event event;
4089 struct lnet_md md = { NULL };
4093 const signed long a_long_time = cfs_time_seconds(60);
4094 struct lnet_ping_buffer *pbuf;
4095 struct lnet_process_id tmpid;
4102 /* n_ids limit is arbitrary */
4103 if (n_ids <= 0 || id.nid == LNET_NID_ANY)
4107 * if the user buffer has more space than the lnet_interfaces_max
4108 * then only fill it up to lnet_interfaces_max
4110 if (n_ids > lnet_interfaces_max)
4111 n_ids = lnet_interfaces_max;
4113 if (id.pid == LNET_PID_ANY)
4114 id.pid = LNET_PID_LUSTRE;
4116 pbuf = lnet_ping_buffer_alloc(n_ids, GFP_NOFS);
4120 /* NB 2 events max (including any unlink event) */
4121 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
4123 CERROR("Can't allocate EQ: %d\n", rc);
4124 goto fail_ping_buffer_decref;
4127 /* initialize md content */
4128 md.start = &pbuf->pb_info;
4129 md.length = LNET_PING_INFO_SIZE(n_ids);
4130 md.threshold = 2; /* GET/REPLY */
4132 md.options = LNET_MD_TRUNCATE;
4136 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
4138 CERROR("Can't bind MD: %d\n", rc);
4142 rc = LNetGet(LNET_NID_ANY, mdh, id,
4143 LNET_RESERVED_PORTAL,
4144 LNET_PROTO_PING_MATCHBITS, 0, false);
4147 /* Don't CERROR; this could be deliberate! */
4148 rc2 = LNetMDUnlink(mdh);
4151 /* NB must wait for the UNLINK event below... */
4153 timeout = a_long_time;
4157 /* MUST block for unlink to complete */
4159 blocked = cfs_block_allsigs();
4161 rc2 = LNetEQPoll(&eqh, 1, timeout, &event, &which);
4164 cfs_restore_sigs(blocked);
4166 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
4167 (rc2 <= 0) ? -1 : event.type,
4168 (rc2 <= 0) ? -1 : event.status,
4169 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
4171 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
4173 if (rc2 <= 0 || event.status != 0) {
4174 /* timeout or error */
4175 if (!replied && rc == 0)
4176 rc = (rc2 < 0) ? rc2 :
4177 (rc2 == 0) ? -ETIMEDOUT :
4181 /* Ensure completion in finite time... */
4183 /* No assertion (racing with network) */
4185 timeout = a_long_time;
4186 } else if (rc2 == 0) {
4187 /* timed out waiting for unlink */
4188 CWARN("ping %s: late network completion\n",
4191 } else if (event.type == LNET_EVENT_REPLY) {
4195 } while (rc2 <= 0 || !event.unlinked);
4199 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
4206 LASSERT(nob >= 0 && nob <= LNET_PING_INFO_SIZE(n_ids));
4208 rc = -EPROTO; /* if I can't parse... */
4211 CERROR("%s: ping info too short %d\n",
4212 libcfs_id2str(id), nob);
4216 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
4217 lnet_swap_pinginfo(pbuf);
4218 } else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
4219 CERROR("%s: Unexpected magic %08x\n",
4220 libcfs_id2str(id), pbuf->pb_info.pi_magic);
4224 if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
4225 CERROR("%s: ping w/o NI status: 0x%x\n",
4226 libcfs_id2str(id), pbuf->pb_info.pi_features);
4230 if (nob < LNET_PING_INFO_SIZE(0)) {
4231 CERROR("%s: Short reply %d(%d min)\n",
4233 nob, (int)LNET_PING_INFO_SIZE(0));
4237 if (pbuf->pb_info.pi_nnis < n_ids)
4238 n_ids = pbuf->pb_info.pi_nnis;
4240 if (nob < LNET_PING_INFO_SIZE(n_ids)) {
4241 CERROR("%s: Short reply %d(%d expected)\n",
4243 nob, (int)LNET_PING_INFO_SIZE(n_ids));
4247 rc = -EFAULT; /* if I segv in copy_to_user()... */
4249 memset(&tmpid, 0, sizeof(tmpid));
4250 for (i = 0; i < n_ids; i++) {
4251 tmpid.pid = pbuf->pb_info.pi_pid;
4252 tmpid.nid = pbuf->pb_info.pi_ni[i].ns_nid;
4253 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
4256 rc = pbuf->pb_info.pi_nnis;
4259 rc2 = LNetEQFree(eqh);
4261 CERROR("rc2 %d\n", rc2);
4264 fail_ping_buffer_decref:
4265 lnet_ping_buffer_decref(pbuf);
4270 lnet_discover(struct lnet_process_id id, __u32 force,
4271 struct lnet_process_id __user *ids, int n_ids)
4273 struct lnet_peer_ni *lpni;
4274 struct lnet_peer_ni *p;
4275 struct lnet_peer *lp;
4276 struct lnet_process_id *buf;
4280 int max_intf = lnet_interfaces_max;
4284 id.nid == LNET_NID_ANY)
4287 if (id.pid == LNET_PID_ANY)
4288 id.pid = LNET_PID_LUSTRE;
4291 * if the user buffer has more space than the max_intf
4292 * then only fill it up to max_intf
4294 if (n_ids > max_intf)
4297 buf_size = n_ids * sizeof(*buf);
4299 LIBCFS_ALLOC(buf, buf_size);
4303 cpt = lnet_net_lock_current();
4304 lpni = lnet_nid2peerni_locked(id.nid, LNET_NID_ANY, cpt);
4311 * Clearing the NIDS_UPTODATE flag ensures the peer will
4312 * be discovered, provided discovery has not been disabled.
4314 lp = lpni->lpni_peer_net->lpn_peer;
4315 spin_lock(&lp->lp_lock);
4316 lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
4317 /* If the force flag is set, force a PING and PUSH as well. */
4319 lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
4320 spin_unlock(&lp->lp_lock);
4321 rc = lnet_discover_peer_locked(lpni, cpt, true);
4325 /* Peer may have changed. */
4326 lp = lpni->lpni_peer_net->lpn_peer;
4327 if (lp->lp_nnis < n_ids)
4328 n_ids = lp->lp_nnis;
4332 while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
4333 buf[i].pid = id.pid;
4334 buf[i].nid = p->lpni_nid;
4339 lnet_net_unlock(cpt);
4342 if (copy_to_user(ids, buf, n_ids * sizeof(*buf)))
4348 lnet_peer_ni_decref_locked(lpni);
4350 lnet_net_unlock(cpt);
4352 LIBCFS_FREE(buf, buf_size);
4358 * Retrieve peer discovery status.
4360 * \retval 1 if lnet_peer_discovery_disabled is 0
4361 * \retval 0 if lnet_peer_discovery_disabled is 1
4364 LNetGetPeerDiscoveryStatus(void)
4366 return !lnet_peer_discovery_disabled;
4368 EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);