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_completion(&the_lnet.ln_mt_wait_complete);
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;
804 /* holding lnd mutex */
805 if (type >= NUM_LNDS)
807 lnd = the_lnet.ln_lnds[type];
808 LASSERT(!lnd || lnd->lnd_type == type);
814 lnet_get_lnd_timeout(void)
816 return lnet_lnd_timeout;
818 EXPORT_SYMBOL(lnet_get_lnd_timeout);
821 lnet_register_lnd(struct lnet_lnd *lnd)
823 mutex_lock(&the_lnet.ln_lnd_mutex);
825 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
826 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
828 the_lnet.ln_lnds[lnd->lnd_type] = lnd;
830 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
832 mutex_unlock(&the_lnet.ln_lnd_mutex);
834 EXPORT_SYMBOL(lnet_register_lnd);
837 lnet_unregister_lnd(struct lnet_lnd *lnd)
839 mutex_lock(&the_lnet.ln_lnd_mutex);
841 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
843 the_lnet.ln_lnds[lnd->lnd_type] = NULL;
844 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
846 mutex_unlock(&the_lnet.ln_lnd_mutex);
848 EXPORT_SYMBOL(lnet_unregister_lnd);
851 lnet_counters_get_common(struct lnet_counters_common *common)
853 struct lnet_counters *ctr;
856 memset(common, 0, sizeof(*common));
858 lnet_net_lock(LNET_LOCK_EX);
860 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
861 common->lcc_msgs_max += ctr->lct_common.lcc_msgs_max;
862 common->lcc_msgs_alloc += ctr->lct_common.lcc_msgs_alloc;
863 common->lcc_errors += ctr->lct_common.lcc_errors;
864 common->lcc_send_count += ctr->lct_common.lcc_send_count;
865 common->lcc_recv_count += ctr->lct_common.lcc_recv_count;
866 common->lcc_route_count += ctr->lct_common.lcc_route_count;
867 common->lcc_drop_count += ctr->lct_common.lcc_drop_count;
868 common->lcc_send_length += ctr->lct_common.lcc_send_length;
869 common->lcc_recv_length += ctr->lct_common.lcc_recv_length;
870 common->lcc_route_length += ctr->lct_common.lcc_route_length;
871 common->lcc_drop_length += ctr->lct_common.lcc_drop_length;
873 lnet_net_unlock(LNET_LOCK_EX);
875 EXPORT_SYMBOL(lnet_counters_get_common);
878 lnet_counters_get(struct lnet_counters *counters)
880 struct lnet_counters *ctr;
881 struct lnet_counters_health *health = &counters->lct_health;
884 memset(counters, 0, sizeof(*counters));
886 lnet_counters_get_common(&counters->lct_common);
888 lnet_net_lock(LNET_LOCK_EX);
890 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
891 health->lch_rst_alloc += ctr->lct_health.lch_rst_alloc;
892 health->lch_resend_count += ctr->lct_health.lch_resend_count;
893 health->lch_response_timeout_count +=
894 ctr->lct_health.lch_response_timeout_count;
895 health->lch_local_interrupt_count +=
896 ctr->lct_health.lch_local_interrupt_count;
897 health->lch_local_dropped_count +=
898 ctr->lct_health.lch_local_dropped_count;
899 health->lch_local_aborted_count +=
900 ctr->lct_health.lch_local_aborted_count;
901 health->lch_local_no_route_count +=
902 ctr->lct_health.lch_local_no_route_count;
903 health->lch_local_timeout_count +=
904 ctr->lct_health.lch_local_timeout_count;
905 health->lch_local_error_count +=
906 ctr->lct_health.lch_local_error_count;
907 health->lch_remote_dropped_count +=
908 ctr->lct_health.lch_remote_dropped_count;
909 health->lch_remote_error_count +=
910 ctr->lct_health.lch_remote_error_count;
911 health->lch_remote_timeout_count +=
912 ctr->lct_health.lch_remote_timeout_count;
913 health->lch_network_timeout_count +=
914 ctr->lct_health.lch_network_timeout_count;
916 lnet_net_unlock(LNET_LOCK_EX);
918 EXPORT_SYMBOL(lnet_counters_get);
921 lnet_counters_reset(void)
923 struct lnet_counters *counters;
926 lnet_net_lock(LNET_LOCK_EX);
928 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
929 memset(counters, 0, sizeof(struct lnet_counters));
931 lnet_net_unlock(LNET_LOCK_EX);
935 lnet_res_type2str(int type)
940 case LNET_COOKIE_TYPE_MD:
942 case LNET_COOKIE_TYPE_ME:
944 case LNET_COOKIE_TYPE_EQ:
950 lnet_res_container_cleanup(struct lnet_res_container *rec)
954 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
957 while (!list_empty(&rec->rec_active)) {
958 struct list_head *e = rec->rec_active.next;
961 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
962 lnet_eq_free(list_entry(e, struct lnet_eq, eq_list));
964 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
965 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
967 } else { /* NB: Active MEs should be attached on portals */
974 /* Found alive MD/ME/EQ, user really should unlink/free
975 * all of them before finalize LNet, but if someone didn't,
976 * we have to recycle garbage for him */
977 CERROR("%d active elements on exit of %s container\n",
978 count, lnet_res_type2str(rec->rec_type));
981 if (rec->rec_lh_hash != NULL) {
982 LIBCFS_FREE(rec->rec_lh_hash,
983 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
984 rec->rec_lh_hash = NULL;
987 rec->rec_type = 0; /* mark it as finalized */
991 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
996 LASSERT(rec->rec_type == 0);
998 rec->rec_type = type;
999 INIT_LIST_HEAD(&rec->rec_active);
1001 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
1003 /* Arbitrary choice of hash table size */
1004 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
1005 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
1006 if (rec->rec_lh_hash == NULL) {
1011 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
1012 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
1017 CERROR("Failed to setup %s resource container\n",
1018 lnet_res_type2str(type));
1019 lnet_res_container_cleanup(rec);
1024 lnet_res_containers_destroy(struct lnet_res_container **recs)
1026 struct lnet_res_container *rec;
1029 cfs_percpt_for_each(rec, i, recs)
1030 lnet_res_container_cleanup(rec);
1032 cfs_percpt_free(recs);
1035 static struct lnet_res_container **
1036 lnet_res_containers_create(int type)
1038 struct lnet_res_container **recs;
1039 struct lnet_res_container *rec;
1043 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
1045 CERROR("Failed to allocate %s resource containers\n",
1046 lnet_res_type2str(type));
1050 cfs_percpt_for_each(rec, i, recs) {
1051 rc = lnet_res_container_setup(rec, i, type);
1053 lnet_res_containers_destroy(recs);
1061 struct lnet_libhandle *
1062 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
1064 /* ALWAYS called with lnet_res_lock held */
1065 struct list_head *head;
1066 struct lnet_libhandle *lh;
1069 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
1072 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
1073 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
1075 list_for_each_entry(lh, head, lh_hash_chain) {
1076 if (lh->lh_cookie == cookie)
1084 lnet_res_lh_initialize(struct lnet_res_container *rec,
1085 struct lnet_libhandle *lh)
1087 /* ALWAYS called with lnet_res_lock held */
1088 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
1091 lh->lh_cookie = rec->rec_lh_cookie;
1092 rec->rec_lh_cookie += 1 << ibits;
1094 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
1096 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
1100 lnet_create_array_of_queues(void)
1102 struct list_head **qs;
1103 struct list_head *q;
1106 qs = cfs_percpt_alloc(lnet_cpt_table(),
1107 sizeof(struct list_head));
1109 CERROR("Failed to allocate queues\n");
1113 cfs_percpt_for_each(q, i, qs)
1119 static int lnet_unprepare(void);
1122 lnet_prepare(lnet_pid_t requested_pid)
1124 /* Prepare to bring up the network */
1125 struct lnet_res_container **recs;
1128 if (requested_pid == LNET_PID_ANY) {
1129 /* Don't instantiate LNET just for me */
1133 LASSERT(the_lnet.ln_refcount == 0);
1135 the_lnet.ln_routing = 0;
1137 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
1138 the_lnet.ln_pid = requested_pid;
1140 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
1141 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
1142 INIT_LIST_HEAD(&the_lnet.ln_nets);
1143 INIT_LIST_HEAD(&the_lnet.ln_routers);
1144 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
1145 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
1146 INIT_LIST_HEAD(&the_lnet.ln_dc_request);
1147 INIT_LIST_HEAD(&the_lnet.ln_dc_working);
1148 INIT_LIST_HEAD(&the_lnet.ln_dc_expired);
1149 INIT_LIST_HEAD(&the_lnet.ln_mt_localNIRecovq);
1150 INIT_LIST_HEAD(&the_lnet.ln_mt_peerNIRecovq);
1151 init_waitqueue_head(&the_lnet.ln_dc_waitq);
1152 LNetInvalidateEQHandle(&the_lnet.ln_mt_eqh);
1153 init_completion(&the_lnet.ln_started);
1155 rc = lnet_descriptor_setup();
1159 rc = lnet_create_remote_nets_table();
1164 * NB the interface cookie in wire handles guards against delayed
1165 * replies and ACKs appearing valid after reboot.
1167 the_lnet.ln_interface_cookie = ktime_get_real_ns();
1169 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
1170 sizeof(struct lnet_counters));
1171 if (the_lnet.ln_counters == NULL) {
1172 CERROR("Failed to allocate counters for LNet\n");
1177 rc = lnet_peer_tables_create();
1181 rc = lnet_msg_containers_create();
1185 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
1186 LNET_COOKIE_TYPE_EQ);
1190 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
1196 the_lnet.ln_me_containers = recs;
1198 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
1204 the_lnet.ln_md_containers = recs;
1206 rc = lnet_portals_create();
1208 CERROR("Failed to create portals for LNet: %d\n", rc);
1212 the_lnet.ln_mt_zombie_rstqs = lnet_create_array_of_queues();
1213 if (!the_lnet.ln_mt_zombie_rstqs) {
1226 lnet_unprepare (void)
1230 /* NB no LNET_LOCK since this is the last reference. All LND instances
1231 * have shut down already, so it is safe to unlink and free all
1232 * descriptors, even those that appear committed to a network op (eg MD
1233 * with non-zero pending count) */
1235 lnet_fail_nid(LNET_NID_ANY, 0);
1237 LASSERT(the_lnet.ln_refcount == 0);
1238 LASSERT(list_empty(&the_lnet.ln_test_peers));
1239 LASSERT(list_empty(&the_lnet.ln_nets));
1241 if (the_lnet.ln_mt_zombie_rstqs) {
1242 lnet_clean_zombie_rstqs();
1243 the_lnet.ln_mt_zombie_rstqs = NULL;
1246 if (!LNetEQHandleIsInvalid(the_lnet.ln_mt_eqh)) {
1247 rc = LNetEQFree(the_lnet.ln_mt_eqh);
1248 LNetInvalidateEQHandle(&the_lnet.ln_mt_eqh);
1252 lnet_portals_destroy();
1254 if (the_lnet.ln_md_containers != NULL) {
1255 lnet_res_containers_destroy(the_lnet.ln_md_containers);
1256 the_lnet.ln_md_containers = NULL;
1259 if (the_lnet.ln_me_containers != NULL) {
1260 lnet_res_containers_destroy(the_lnet.ln_me_containers);
1261 the_lnet.ln_me_containers = NULL;
1264 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
1266 lnet_msg_containers_destroy();
1268 lnet_rtrpools_free(0);
1270 if (the_lnet.ln_counters != NULL) {
1271 cfs_percpt_free(the_lnet.ln_counters);
1272 the_lnet.ln_counters = NULL;
1274 lnet_destroy_remote_nets_table();
1275 lnet_descriptor_cleanup();
1281 lnet_net2ni_locked(__u32 net_id, int cpt)
1284 struct lnet_net *net;
1286 LASSERT(cpt != LNET_LOCK_EX);
1288 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1289 if (net->net_id == net_id) {
1290 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
1300 lnet_net2ni_addref(__u32 net)
1305 ni = lnet_net2ni_locked(net, 0);
1307 lnet_ni_addref_locked(ni, 0);
1312 EXPORT_SYMBOL(lnet_net2ni_addref);
1315 lnet_get_net_locked(__u32 net_id)
1317 struct lnet_net *net;
1319 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1320 if (net->net_id == net_id)
1328 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
1333 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
1338 val = hash_long(key, LNET_CPT_BITS);
1339 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
1343 return (unsigned int)(key + val + (val >> 1)) % number;
1347 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
1349 struct lnet_net *net;
1351 /* must called with hold of lnet_net_lock */
1352 if (LNET_CPT_NUMBER == 1)
1353 return 0; /* the only one */
1356 * If NI is provided then use the CPT identified in the NI cpt
1357 * list if one exists. If one doesn't exist, then that NI is
1358 * associated with all CPTs and it follows that the net it belongs
1359 * to is implicitly associated with all CPTs, so just hash the nid
1363 if (ni->ni_cpts != NULL)
1364 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
1367 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1370 /* no NI provided so look at the net */
1371 net = lnet_get_net_locked(LNET_NIDNET(nid));
1373 if (net != NULL && net->net_cpts != NULL) {
1374 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
1377 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
1381 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
1386 if (LNET_CPT_NUMBER == 1)
1387 return 0; /* the only one */
1389 cpt = lnet_net_lock_current();
1391 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
1393 lnet_net_unlock(cpt);
1397 EXPORT_SYMBOL(lnet_cpt_of_nid);
1400 lnet_islocalnet_locked(__u32 net_id)
1402 struct lnet_net *net;
1405 net = lnet_get_net_locked(net_id);
1407 local = net != NULL;
1413 lnet_islocalnet(__u32 net_id)
1418 cpt = lnet_net_lock_current();
1420 local = lnet_islocalnet_locked(net_id);
1422 lnet_net_unlock(cpt);
1428 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
1430 struct lnet_net *net;
1433 LASSERT(cpt != LNET_LOCK_EX);
1435 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1436 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1437 if (ni->ni_nid == nid)
1446 lnet_nid2ni_addref(lnet_nid_t nid)
1451 ni = lnet_nid2ni_locked(nid, 0);
1453 lnet_ni_addref_locked(ni, 0);
1458 EXPORT_SYMBOL(lnet_nid2ni_addref);
1461 lnet_islocalnid(lnet_nid_t nid)
1466 cpt = lnet_net_lock_current();
1467 ni = lnet_nid2ni_locked(nid, cpt);
1468 lnet_net_unlock(cpt);
1474 lnet_count_acceptor_nets(void)
1476 /* Return the # of NIs that need the acceptor. */
1478 struct lnet_net *net;
1481 cpt = lnet_net_lock_current();
1482 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1483 /* all socklnd type networks should have the acceptor
1485 if (net->net_lnd->lnd_accept != NULL)
1489 lnet_net_unlock(cpt);
1494 struct lnet_ping_buffer *
1495 lnet_ping_buffer_alloc(int nnis, gfp_t gfp)
1497 struct lnet_ping_buffer *pbuf;
1499 LIBCFS_ALLOC_GFP(pbuf, LNET_PING_BUFFER_SIZE(nnis), gfp);
1501 pbuf->pb_nnis = nnis;
1502 atomic_set(&pbuf->pb_refcnt, 1);
1509 lnet_ping_buffer_free(struct lnet_ping_buffer *pbuf)
1511 LASSERT(lnet_ping_buffer_numref(pbuf) == 0);
1512 LIBCFS_FREE(pbuf, LNET_PING_BUFFER_SIZE(pbuf->pb_nnis));
1515 static struct lnet_ping_buffer *
1516 lnet_ping_target_create(int nnis)
1518 struct lnet_ping_buffer *pbuf;
1520 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1522 CERROR("Can't allocate ping source [%d]\n", nnis);
1526 pbuf->pb_info.pi_nnis = nnis;
1527 pbuf->pb_info.pi_pid = the_lnet.ln_pid;
1528 pbuf->pb_info.pi_magic = LNET_PROTO_PING_MAGIC;
1529 pbuf->pb_info.pi_features =
1530 LNET_PING_FEAT_NI_STATUS | LNET_PING_FEAT_MULTI_RAIL;
1536 lnet_get_net_ni_count_locked(struct lnet_net *net)
1541 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1548 lnet_get_net_ni_count_pre(struct lnet_net *net)
1553 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1560 lnet_get_ni_count(void)
1563 struct lnet_net *net;
1568 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1569 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1579 lnet_get_net_count(void)
1581 struct lnet_net *net;
1586 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1596 lnet_swap_pinginfo(struct lnet_ping_buffer *pbuf)
1598 struct lnet_ni_status *stat;
1602 __swab32s(&pbuf->pb_info.pi_magic);
1603 __swab32s(&pbuf->pb_info.pi_features);
1604 __swab32s(&pbuf->pb_info.pi_pid);
1605 __swab32s(&pbuf->pb_info.pi_nnis);
1606 nnis = pbuf->pb_info.pi_nnis;
1607 if (nnis > pbuf->pb_nnis)
1608 nnis = pbuf->pb_nnis;
1609 for (i = 0; i < nnis; i++) {
1610 stat = &pbuf->pb_info.pi_ni[i];
1611 __swab64s(&stat->ns_nid);
1612 __swab32s(&stat->ns_status);
1617 lnet_ping_info_validate(struct lnet_ping_info *pinfo)
1621 if (pinfo->pi_magic != LNET_PROTO_PING_MAGIC)
1623 if (!(pinfo->pi_features & LNET_PING_FEAT_NI_STATUS))
1625 /* Loopback is guaranteed to be present */
1626 if (pinfo->pi_nnis < 1 || pinfo->pi_nnis > lnet_interfaces_max)
1628 if (LNET_NETTYP(LNET_NIDNET(LNET_PING_INFO_LONI(pinfo))) != LOLND)
1634 lnet_ping_target_destroy(void)
1636 struct lnet_net *net;
1639 lnet_net_lock(LNET_LOCK_EX);
1641 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1642 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1644 ni->ni_status = NULL;
1649 lnet_ping_buffer_decref(the_lnet.ln_ping_target);
1650 the_lnet.ln_ping_target = NULL;
1652 lnet_net_unlock(LNET_LOCK_EX);
1656 lnet_ping_target_event_handler(struct lnet_event *event)
1658 struct lnet_ping_buffer *pbuf = event->md.user_ptr;
1660 if (event->unlinked)
1661 lnet_ping_buffer_decref(pbuf);
1665 lnet_ping_target_setup(struct lnet_ping_buffer **ppbuf,
1666 struct lnet_handle_md *ping_mdh,
1667 int ni_count, bool set_eq)
1669 struct lnet_process_id id = {
1670 .nid = LNET_NID_ANY,
1673 struct lnet_handle_me me_handle;
1674 struct lnet_md md = { NULL };
1678 rc = LNetEQAlloc(0, lnet_ping_target_event_handler,
1679 &the_lnet.ln_ping_target_eq);
1681 CERROR("Can't allocate ping buffer EQ: %d\n", rc);
1686 *ppbuf = lnet_ping_target_create(ni_count);
1687 if (*ppbuf == NULL) {
1692 /* Ping target ME/MD */
1693 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1694 LNET_PROTO_PING_MATCHBITS, 0,
1695 LNET_UNLINK, LNET_INS_AFTER,
1698 CERROR("Can't create ping target ME: %d\n", rc);
1699 goto fail_decref_ping_buffer;
1702 /* initialize md content */
1703 md.start = &(*ppbuf)->pb_info;
1704 md.length = LNET_PING_INFO_SIZE((*ppbuf)->pb_nnis);
1705 md.threshold = LNET_MD_THRESH_INF;
1707 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1708 LNET_MD_MANAGE_REMOTE;
1709 md.eq_handle = the_lnet.ln_ping_target_eq;
1710 md.user_ptr = *ppbuf;
1712 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, ping_mdh);
1714 CERROR("Can't attach ping target MD: %d\n", rc);
1715 goto fail_unlink_ping_me;
1717 lnet_ping_buffer_addref(*ppbuf);
1721 fail_unlink_ping_me:
1722 rc2 = LNetMEUnlink(me_handle);
1724 fail_decref_ping_buffer:
1725 LASSERT(lnet_ping_buffer_numref(*ppbuf) == 1);
1726 lnet_ping_buffer_decref(*ppbuf);
1730 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1737 lnet_ping_md_unlink(struct lnet_ping_buffer *pbuf,
1738 struct lnet_handle_md *ping_mdh)
1740 sigset_t blocked = cfs_block_allsigs();
1742 LNetMDUnlink(*ping_mdh);
1743 LNetInvalidateMDHandle(ping_mdh);
1745 /* NB the MD could be busy; this just starts the unlink */
1746 while (lnet_ping_buffer_numref(pbuf) > 1) {
1747 CDEBUG(D_NET, "Still waiting for ping data MD to unlink\n");
1748 set_current_state(TASK_UNINTERRUPTIBLE);
1749 schedule_timeout(cfs_time_seconds(1));
1752 cfs_restore_sigs(blocked);
1756 lnet_ping_target_install_locked(struct lnet_ping_buffer *pbuf)
1759 struct lnet_net *net;
1760 struct lnet_ni_status *ns;
1765 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1766 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1767 LASSERT(i < pbuf->pb_nnis);
1769 ns = &pbuf->pb_info.pi_ni[i];
1771 ns->ns_nid = ni->ni_nid;
1774 ns->ns_status = (ni->ni_status != NULL) ?
1775 ni->ni_status->ns_status :
1784 * We (ab)use the ns_status of the loopback interface to
1785 * transmit the sequence number. The first interface listed
1786 * must be the loopback interface.
1788 rc = lnet_ping_info_validate(&pbuf->pb_info);
1790 LCONSOLE_EMERG("Invalid ping target: %d\n", rc);
1793 LNET_PING_BUFFER_SEQNO(pbuf) =
1794 atomic_inc_return(&the_lnet.ln_ping_target_seqno);
1798 lnet_ping_target_update(struct lnet_ping_buffer *pbuf,
1799 struct lnet_handle_md ping_mdh)
1801 struct lnet_ping_buffer *old_pbuf = NULL;
1802 struct lnet_handle_md old_ping_md;
1804 /* switch the NIs to point to the new ping info created */
1805 lnet_net_lock(LNET_LOCK_EX);
1807 if (!the_lnet.ln_routing)
1808 pbuf->pb_info.pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1809 if (!lnet_peer_discovery_disabled)
1810 pbuf->pb_info.pi_features |= LNET_PING_FEAT_DISCOVERY;
1812 /* Ensure only known feature bits have been set. */
1813 LASSERT(pbuf->pb_info.pi_features & LNET_PING_FEAT_BITS);
1814 LASSERT(!(pbuf->pb_info.pi_features & ~LNET_PING_FEAT_BITS));
1816 lnet_ping_target_install_locked(pbuf);
1818 if (the_lnet.ln_ping_target) {
1819 old_pbuf = the_lnet.ln_ping_target;
1820 old_ping_md = the_lnet.ln_ping_target_md;
1822 the_lnet.ln_ping_target_md = ping_mdh;
1823 the_lnet.ln_ping_target = pbuf;
1825 lnet_net_unlock(LNET_LOCK_EX);
1828 /* unlink and free the old ping info */
1829 lnet_ping_md_unlink(old_pbuf, &old_ping_md);
1830 lnet_ping_buffer_decref(old_pbuf);
1833 lnet_push_update_to_peers(0);
1837 lnet_ping_target_fini(void)
1841 lnet_ping_md_unlink(the_lnet.ln_ping_target,
1842 &the_lnet.ln_ping_target_md);
1844 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1847 lnet_ping_target_destroy();
1850 /* Resize the push target. */
1851 int lnet_push_target_resize(void)
1853 struct lnet_process_id id = { LNET_NID_ANY, LNET_PID_ANY };
1854 struct lnet_md md = { NULL };
1855 struct lnet_handle_me meh;
1856 struct lnet_handle_md mdh;
1857 struct lnet_handle_md old_mdh;
1858 struct lnet_ping_buffer *pbuf;
1859 struct lnet_ping_buffer *old_pbuf;
1860 int nnis = the_lnet.ln_push_target_nnis;
1868 pbuf = lnet_ping_buffer_alloc(nnis, GFP_NOFS);
1874 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1875 LNET_PROTO_PING_MATCHBITS, 0,
1876 LNET_UNLINK, LNET_INS_AFTER,
1879 CERROR("Can't create push target ME: %d\n", rc);
1880 goto fail_decref_pbuf;
1883 /* initialize md content */
1884 md.start = &pbuf->pb_info;
1885 md.length = LNET_PING_INFO_SIZE(nnis);
1886 md.threshold = LNET_MD_THRESH_INF;
1888 md.options = LNET_MD_OP_PUT | LNET_MD_TRUNCATE |
1889 LNET_MD_MANAGE_REMOTE;
1891 md.eq_handle = the_lnet.ln_push_target_eq;
1893 rc = LNetMDAttach(meh, md, LNET_RETAIN, &mdh);
1895 CERROR("Can't attach push MD: %d\n", rc);
1896 goto fail_unlink_meh;
1898 lnet_ping_buffer_addref(pbuf);
1900 lnet_net_lock(LNET_LOCK_EX);
1901 old_pbuf = the_lnet.ln_push_target;
1902 old_mdh = the_lnet.ln_push_target_md;
1903 the_lnet.ln_push_target = pbuf;
1904 the_lnet.ln_push_target_md = mdh;
1905 lnet_net_unlock(LNET_LOCK_EX);
1908 LNetMDUnlink(old_mdh);
1909 lnet_ping_buffer_decref(old_pbuf);
1912 if (nnis < the_lnet.ln_push_target_nnis)
1915 CDEBUG(D_NET, "nnis %d success\n", nnis);
1922 lnet_ping_buffer_decref(pbuf);
1924 CDEBUG(D_NET, "nnis %d error %d\n", nnis, rc);
1928 static void lnet_push_target_event_handler(struct lnet_event *ev)
1930 struct lnet_ping_buffer *pbuf = ev->md.user_ptr;
1932 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC))
1933 lnet_swap_pinginfo(pbuf);
1935 lnet_peer_push_event(ev);
1937 lnet_ping_buffer_decref(pbuf);
1940 /* Initialize the push target. */
1941 static int lnet_push_target_init(void)
1945 if (the_lnet.ln_push_target)
1948 rc = LNetEQAlloc(0, lnet_push_target_event_handler,
1949 &the_lnet.ln_push_target_eq);
1951 CERROR("Can't allocated push target EQ: %d\n", rc);
1955 /* Start at the required minimum, we'll enlarge if required. */
1956 the_lnet.ln_push_target_nnis = LNET_INTERFACES_MIN;
1958 rc = lnet_push_target_resize();
1961 LNetEQFree(the_lnet.ln_push_target_eq);
1962 LNetInvalidateEQHandle(&the_lnet.ln_push_target_eq);
1968 /* Clean up the push target. */
1969 static void lnet_push_target_fini(void)
1971 if (!the_lnet.ln_push_target)
1974 /* Unlink and invalidate to prevent new references. */
1975 LNetMDUnlink(the_lnet.ln_push_target_md);
1976 LNetInvalidateMDHandle(&the_lnet.ln_push_target_md);
1978 /* Wait for the unlink to complete. */
1979 while (lnet_ping_buffer_numref(the_lnet.ln_push_target) > 1) {
1980 CDEBUG(D_NET, "Still waiting for ping data MD to unlink\n");
1981 set_current_state(TASK_UNINTERRUPTIBLE);
1982 schedule_timeout(cfs_time_seconds(1));
1985 lnet_ping_buffer_decref(the_lnet.ln_push_target);
1986 the_lnet.ln_push_target = NULL;
1987 the_lnet.ln_push_target_nnis = 0;
1989 LNetEQFree(the_lnet.ln_push_target_eq);
1990 LNetInvalidateEQHandle(&the_lnet.ln_push_target_eq);
1994 lnet_ni_tq_credits(struct lnet_ni *ni)
1998 LASSERT(ni->ni_ncpts >= 1);
2000 if (ni->ni_ncpts == 1)
2001 return ni->ni_net->net_tunables.lct_max_tx_credits;
2003 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
2004 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
2005 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
2011 lnet_ni_unlink_locked(struct lnet_ni *ni)
2013 /* move it to zombie list and nobody can find it anymore */
2014 LASSERT(!list_empty(&ni->ni_netlist));
2015 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
2016 lnet_ni_decref_locked(ni, 0);
2020 lnet_clear_zombies_nis_locked(struct lnet_net *net)
2025 struct list_head *zombie_list = &net->net_ni_zombie;
2028 * Now wait for the NIs I just nuked to show up on the zombie
2029 * list and shut them down in guaranteed thread context
2032 while (!list_empty(zombie_list)) {
2036 ni = list_entry(zombie_list->next,
2037 struct lnet_ni, ni_netlist);
2038 list_del_init(&ni->ni_netlist);
2039 /* the ni should be in deleting state. If it's not it's
2041 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
2042 cfs_percpt_for_each(ref, j, ni->ni_refs) {
2045 /* still busy, add it back to zombie list */
2046 list_add(&ni->ni_netlist, zombie_list);
2050 if (!list_empty(&ni->ni_netlist)) {
2051 lnet_net_unlock(LNET_LOCK_EX);
2053 if ((i & (-i)) == i) {
2055 "Waiting for zombie LNI %s\n",
2056 libcfs_nid2str(ni->ni_nid));
2058 set_current_state(TASK_UNINTERRUPTIBLE);
2059 schedule_timeout(cfs_time_seconds(1));
2060 lnet_net_lock(LNET_LOCK_EX);
2064 lnet_net_unlock(LNET_LOCK_EX);
2066 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
2068 LASSERT(!in_interrupt());
2069 (net->net_lnd->lnd_shutdown)(ni);
2072 CDEBUG(D_LNI, "Removed LNI %s\n",
2073 libcfs_nid2str(ni->ni_nid));
2077 lnet_net_lock(LNET_LOCK_EX);
2081 /* shutdown down the NI and release refcount */
2083 lnet_shutdown_lndni(struct lnet_ni *ni)
2086 struct lnet_net *net = ni->ni_net;
2088 lnet_net_lock(LNET_LOCK_EX);
2090 ni->ni_state = LNET_NI_STATE_DELETING;
2092 lnet_ni_unlink_locked(ni);
2093 lnet_incr_dlc_seq();
2094 lnet_net_unlock(LNET_LOCK_EX);
2096 /* clear messages for this NI on the lazy portal */
2097 for (i = 0; i < the_lnet.ln_nportals; i++)
2098 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
2100 lnet_net_lock(LNET_LOCK_EX);
2101 lnet_clear_zombies_nis_locked(net);
2102 lnet_net_unlock(LNET_LOCK_EX);
2106 lnet_shutdown_lndnet(struct lnet_net *net)
2110 lnet_net_lock(LNET_LOCK_EX);
2112 list_del_init(&net->net_list);
2114 while (!list_empty(&net->net_ni_list)) {
2115 ni = list_entry(net->net_ni_list.next,
2116 struct lnet_ni, ni_netlist);
2117 lnet_net_unlock(LNET_LOCK_EX);
2118 lnet_shutdown_lndni(ni);
2119 lnet_net_lock(LNET_LOCK_EX);
2122 lnet_net_unlock(LNET_LOCK_EX);
2124 /* Do peer table cleanup for this net */
2125 lnet_peer_tables_cleanup(net);
2131 lnet_shutdown_lndnets(void)
2133 struct lnet_net *net;
2134 struct list_head resend;
2135 struct lnet_msg *msg, *tmp;
2137 INIT_LIST_HEAD(&resend);
2139 /* NB called holding the global mutex */
2141 /* All quiet on the API front */
2142 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
2143 LASSERT(the_lnet.ln_refcount == 0);
2145 lnet_net_lock(LNET_LOCK_EX);
2146 the_lnet.ln_state = LNET_STATE_STOPPING;
2148 while (!list_empty(&the_lnet.ln_nets)) {
2150 * move the nets to the zombie list to avoid them being
2151 * picked up for new work. LONET is also included in the
2152 * Nets that will be moved to the zombie list
2154 net = list_entry(the_lnet.ln_nets.next,
2155 struct lnet_net, net_list);
2156 list_move(&net->net_list, &the_lnet.ln_net_zombie);
2159 /* Drop the cached loopback Net. */
2160 if (the_lnet.ln_loni != NULL) {
2161 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
2162 the_lnet.ln_loni = NULL;
2164 lnet_net_unlock(LNET_LOCK_EX);
2166 /* iterate through the net zombie list and delete each net */
2167 while (!list_empty(&the_lnet.ln_net_zombie)) {
2168 net = list_entry(the_lnet.ln_net_zombie.next,
2169 struct lnet_net, net_list);
2170 lnet_shutdown_lndnet(net);
2173 spin_lock(&the_lnet.ln_msg_resend_lock);
2174 list_splice(&the_lnet.ln_msg_resend, &resend);
2175 spin_unlock(&the_lnet.ln_msg_resend_lock);
2177 list_for_each_entry_safe(msg, tmp, &resend, msg_list) {
2178 list_del_init(&msg->msg_list);
2179 msg->msg_no_resend = true;
2180 lnet_finalize(msg, -ECANCELED);
2183 lnet_net_lock(LNET_LOCK_EX);
2184 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
2185 lnet_net_unlock(LNET_LOCK_EX);
2189 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
2192 struct lnet_tx_queue *tq;
2194 struct lnet_net *net = ni->ni_net;
2196 mutex_lock(&the_lnet.ln_lnd_mutex);
2199 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
2200 ni->ni_lnd_tunables_set = true;
2203 rc = (net->net_lnd->lnd_startup)(ni);
2205 mutex_unlock(&the_lnet.ln_lnd_mutex);
2208 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
2209 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
2214 ni->ni_state = LNET_NI_STATE_ACTIVE;
2217 /* We keep a reference on the loopback net through the loopback NI */
2218 if (net->net_lnd->lnd_type == LOLND) {
2220 LASSERT(the_lnet.ln_loni == NULL);
2221 the_lnet.ln_loni = ni;
2222 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
2223 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
2224 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
2225 ni->ni_net->net_tunables.lct_peer_timeout = 0;
2229 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
2230 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
2231 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
2232 libcfs_lnd2str(net->net_lnd->lnd_type),
2233 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
2235 /* shutdown the NI since if we get here then it must've already
2238 lnet_shutdown_lndni(ni);
2242 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
2243 tq->tq_credits_min =
2244 tq->tq_credits_max =
2245 tq->tq_credits = lnet_ni_tq_credits(ni);
2248 atomic_set(&ni->ni_tx_credits,
2249 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
2250 atomic_set(&ni->ni_healthv, LNET_MAX_HEALTH_VALUE);
2252 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
2253 libcfs_nid2str(ni->ni_nid),
2254 ni->ni_net->net_tunables.lct_peer_tx_credits,
2255 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
2256 ni->ni_net->net_tunables.lct_peer_rtr_credits,
2257 ni->ni_net->net_tunables.lct_peer_timeout);
2266 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
2269 struct lnet_net *net_l = NULL;
2270 struct list_head local_ni_list;
2274 struct lnet_lnd *lnd;
2276 net->net_tunables.lct_peer_timeout;
2278 net->net_tunables.lct_max_tx_credits;
2279 int peerrtrcredits =
2280 net->net_tunables.lct_peer_rtr_credits;
2282 INIT_LIST_HEAD(&local_ni_list);
2285 * make sure that this net is unique. If it isn't then
2286 * we are adding interfaces to an already existing network, and
2287 * 'net' is just a convenient way to pass in the list.
2288 * if it is unique we need to find the LND and load it if
2291 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
2292 lnd_type = LNET_NETTYP(net->net_id);
2294 mutex_lock(&the_lnet.ln_lnd_mutex);
2295 lnd = lnet_find_lnd_by_type(lnd_type);
2298 mutex_unlock(&the_lnet.ln_lnd_mutex);
2299 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
2300 mutex_lock(&the_lnet.ln_lnd_mutex);
2302 lnd = lnet_find_lnd_by_type(lnd_type);
2304 mutex_unlock(&the_lnet.ln_lnd_mutex);
2305 CERROR("Can't load LND %s, module %s, rc=%d\n",
2306 libcfs_lnd2str(lnd_type),
2307 libcfs_lnd2modname(lnd_type), rc);
2308 #ifndef HAVE_MODULE_LOADING_SUPPORT
2309 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
2310 "compiled with kernel module "
2311 "loading support.");
2320 mutex_unlock(&the_lnet.ln_lnd_mutex);
2326 * net_l: if the network being added is unique then net_l
2327 * will point to that network
2328 * if the network being added is not unique then
2329 * net_l points to the existing network.
2331 * When we enter the loop below, we'll pick NIs off he
2332 * network beign added and start them up, then add them to
2333 * a local ni list. Once we've successfully started all
2334 * the NIs then we join the local NI list (of started up
2335 * networks) with the net_l->net_ni_list, which should
2336 * point to the correct network to add the new ni list to
2338 * If any of the new NIs fail to start up, then we want to
2339 * iterate through the local ni list, which should include
2340 * any NIs which were successfully started up, and shut
2343 * After than we want to delete the network being added,
2344 * to avoid a memory leak.
2348 * When a network uses TCP bonding then all its interfaces
2349 * must be specified when the network is first defined: the
2350 * TCP bonding code doesn't allow for interfaces to be added
2353 if (net_l != net && net_l != NULL && use_tcp_bonding &&
2354 LNET_NETTYP(net_l->net_id) == SOCKLND) {
2359 while (!list_empty(&net->net_ni_added)) {
2360 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
2362 list_del_init(&ni->ni_netlist);
2364 /* make sure that the the NI we're about to start
2365 * up is actually unique. if it's not fail. */
2366 if (!lnet_ni_unique_net(&net_l->net_ni_list,
2367 ni->ni_interfaces[0])) {
2372 /* adjust the pointer the parent network, just in case it
2373 * the net is a duplicate */
2376 rc = lnet_startup_lndni(ni, tun);
2381 LASSERT(ni->ni_net->net_tunables.lct_peer_timeout <= 0 ||
2382 ni->ni_net->net_lnd->lnd_query != NULL);
2385 list_add_tail(&ni->ni_netlist, &local_ni_list);
2390 lnet_net_lock(LNET_LOCK_EX);
2391 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
2392 lnet_incr_dlc_seq();
2393 lnet_net_unlock(LNET_LOCK_EX);
2395 /* if the network is not unique then we don't want to keep
2396 * it around after we're done. Free it. Otherwise add that
2397 * net to the global the_lnet.ln_nets */
2398 if (net_l != net && net_l != NULL) {
2400 * TODO - note. currently the tunables can not be updated
2406 * restore tunables after it has been overwitten by the
2409 if (peer_timeout != -1)
2410 net->net_tunables.lct_peer_timeout = peer_timeout;
2411 if (maxtxcredits != -1)
2412 net->net_tunables.lct_max_tx_credits = maxtxcredits;
2413 if (peerrtrcredits != -1)
2414 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
2416 lnet_net_lock(LNET_LOCK_EX);
2417 list_add_tail(&net->net_list, &the_lnet.ln_nets);
2418 lnet_net_unlock(LNET_LOCK_EX);
2421 /* update net count */
2422 lnet_current_net_count = lnet_get_net_count();
2428 * shutdown the new NIs that are being started up
2429 * free the NET being started
2431 while (!list_empty(&local_ni_list)) {
2432 ni = list_entry(local_ni_list.next, struct lnet_ni,
2435 lnet_shutdown_lndni(ni);
2445 lnet_startup_lndnets(struct list_head *netlist)
2447 struct lnet_net *net;
2452 * Change to running state before bringing up the LNDs. This
2453 * allows lnet_shutdown_lndnets() to assert that we've passed
2456 lnet_net_lock(LNET_LOCK_EX);
2457 the_lnet.ln_state = LNET_STATE_RUNNING;
2458 lnet_net_unlock(LNET_LOCK_EX);
2460 while (!list_empty(netlist)) {
2461 net = list_entry(netlist->next, struct lnet_net, net_list);
2462 list_del_init(&net->net_list);
2464 rc = lnet_startup_lndnet(net, NULL);
2474 lnet_shutdown_lndnets();
2480 * Initialize LNet library.
2482 * Automatically called at module loading time. Caller has to call
2483 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
2484 * latter returned 0. It must be called exactly once.
2486 * \retval 0 on success
2487 * \retval -ve on failures.
2489 int lnet_lib_init(void)
2493 lnet_assert_wire_constants();
2495 /* refer to global cfs_cpt_table for now */
2496 the_lnet.ln_cpt_table = cfs_cpt_table;
2497 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
2499 LASSERT(the_lnet.ln_cpt_number > 0);
2500 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
2501 /* we are under risk of consuming all lh_cookie */
2502 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
2503 "please change setting of CPT-table and retry\n",
2504 the_lnet.ln_cpt_number, LNET_CPT_MAX);
2508 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
2509 the_lnet.ln_cpt_bits++;
2511 rc = lnet_create_locks();
2513 CERROR("Can't create LNet global locks: %d\n", rc);
2517 the_lnet.ln_refcount = 0;
2518 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
2519 INIT_LIST_HEAD(&the_lnet.ln_msg_resend);
2521 /* The hash table size is the number of bits it takes to express the set
2522 * ln_num_routes, minus 1 (better to under estimate than over so we
2523 * don't waste memory). */
2524 if (rnet_htable_size <= 0)
2525 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
2526 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
2527 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
2528 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
2529 order_base_2(rnet_htable_size) - 1);
2531 /* All LNDs apart from the LOLND are in separate modules. They
2532 * register themselves when their module loads, and unregister
2533 * themselves when their module is unloaded. */
2534 lnet_register_lnd(&the_lolnd);
2539 * Finalize LNet library.
2541 * \pre lnet_lib_init() called with success.
2542 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
2544 * As this happens at module-unload, all lnds must already be unloaded,
2545 * so they must already be unregistered.
2547 void lnet_lib_exit(void)
2551 LASSERT(the_lnet.ln_refcount == 0);
2552 lnet_unregister_lnd(&the_lolnd);
2553 for (i = 0; i < NUM_LNDS; i++)
2554 LASSERT(!the_lnet.ln_lnds[i]);
2555 lnet_destroy_locks();
2559 * Set LNet PID and start LNet interfaces, routing, and forwarding.
2561 * Users must call this function at least once before any other functions.
2562 * For each successful call there must be a corresponding call to
2563 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
2566 * The PID used by LNet may be different from the one requested.
2569 * \param requested_pid PID requested by the caller.
2571 * \return >= 0 on success, and < 0 error code on failures.
2574 LNetNIInit(lnet_pid_t requested_pid)
2576 int im_a_router = 0;
2579 struct lnet_ping_buffer *pbuf;
2580 struct lnet_handle_md ping_mdh;
2581 struct list_head net_head;
2582 struct lnet_net *net;
2584 INIT_LIST_HEAD(&net_head);
2586 mutex_lock(&the_lnet.ln_api_mutex);
2588 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
2590 if (the_lnet.ln_refcount > 0) {
2591 rc = the_lnet.ln_refcount++;
2592 mutex_unlock(&the_lnet.ln_api_mutex);
2596 rc = lnet_prepare(requested_pid);
2598 mutex_unlock(&the_lnet.ln_api_mutex);
2602 /* create a network for Loopback network */
2603 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
2606 goto err_empty_list;
2609 /* Add in the loopback NI */
2610 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
2612 goto err_empty_list;
2615 /* If LNet is being initialized via DLC it is possible
2616 * that the user requests not to load module parameters (ones which
2617 * are supported by DLC) on initialization. Therefore, make sure not
2618 * to load networks, routes and forwarding from module parameters
2619 * in this case. On cleanup in case of failure only clean up
2620 * routes if it has been loaded */
2621 if (!the_lnet.ln_nis_from_mod_params) {
2622 rc = lnet_parse_networks(&net_head, lnet_get_networks(),
2625 goto err_empty_list;
2628 ni_count = lnet_startup_lndnets(&net_head);
2631 goto err_empty_list;
2634 if (!the_lnet.ln_nis_from_mod_params) {
2635 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
2637 goto err_shutdown_lndnis;
2639 rc = lnet_rtrpools_alloc(im_a_router);
2641 goto err_destroy_routes;
2644 rc = lnet_acceptor_start();
2646 goto err_destroy_routes;
2648 the_lnet.ln_refcount = 1;
2649 /* Now I may use my own API functions... */
2651 rc = lnet_ping_target_setup(&pbuf, &ping_mdh, ni_count, true);
2653 goto err_acceptor_stop;
2655 lnet_ping_target_update(pbuf, ping_mdh);
2657 rc = LNetEQAlloc(0, lnet_mt_event_handler, &the_lnet.ln_mt_eqh);
2659 CERROR("Can't allocate monitor thread EQ: %d\n", rc);
2663 rc = lnet_push_target_init();
2667 rc = lnet_peer_discovery_start();
2669 goto err_destroy_push_target;
2671 rc = lnet_monitor_thr_start();
2673 goto err_stop_discovery_thr;
2676 lnet_router_debugfs_init();
2678 mutex_unlock(&the_lnet.ln_api_mutex);
2680 complete_all(&the_lnet.ln_started);
2682 /* wait for all routers to start */
2683 lnet_wait_router_start();
2687 err_stop_discovery_thr:
2688 lnet_peer_discovery_stop();
2689 err_destroy_push_target:
2690 lnet_push_target_fini();
2692 lnet_ping_target_fini();
2694 the_lnet.ln_refcount = 0;
2695 lnet_acceptor_stop();
2697 if (!the_lnet.ln_nis_from_mod_params)
2698 lnet_destroy_routes();
2699 err_shutdown_lndnis:
2700 lnet_shutdown_lndnets();
2704 mutex_unlock(&the_lnet.ln_api_mutex);
2705 while (!list_empty(&net_head)) {
2706 struct lnet_net *net;
2708 net = list_entry(net_head.next, struct lnet_net, net_list);
2709 list_del_init(&net->net_list);
2714 EXPORT_SYMBOL(LNetNIInit);
2717 * Stop LNet interfaces, routing, and forwarding.
2719 * Users must call this function once for each successful call to LNetNIInit().
2720 * Once the LNetNIFini() operation has been started, the results of pending
2721 * API operations are undefined.
2723 * \return always 0 for current implementation.
2728 mutex_lock(&the_lnet.ln_api_mutex);
2730 LASSERT(the_lnet.ln_refcount > 0);
2732 if (the_lnet.ln_refcount != 1) {
2733 the_lnet.ln_refcount--;
2735 LASSERT(!the_lnet.ln_niinit_self);
2739 lnet_router_debugfs_fini();
2740 lnet_monitor_thr_stop();
2741 lnet_peer_discovery_stop();
2742 lnet_push_target_fini();
2743 lnet_ping_target_fini();
2745 /* Teardown fns that use my own API functions BEFORE here */
2746 the_lnet.ln_refcount = 0;
2748 lnet_acceptor_stop();
2749 lnet_destroy_routes();
2750 lnet_shutdown_lndnets();
2754 mutex_unlock(&the_lnet.ln_api_mutex);
2757 EXPORT_SYMBOL(LNetNIFini);
2760 * Grabs the ni data from the ni structure and fills the out
2763 * \param[in] ni network interface structure
2764 * \param[out] cfg_ni NI config information
2765 * \param[out] tun network and LND tunables
2768 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
2769 struct lnet_ioctl_config_lnd_tunables *tun,
2770 struct lnet_ioctl_element_stats *stats,
2773 size_t min_size = 0;
2776 if (!ni || !cfg_ni || !tun)
2779 if (ni->ni_interfaces[0] != NULL) {
2780 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2781 if (ni->ni_interfaces[i] != NULL) {
2782 strncpy(cfg_ni->lic_ni_intf[i],
2783 ni->ni_interfaces[i],
2784 sizeof(cfg_ni->lic_ni_intf[i]));
2789 cfg_ni->lic_nid = ni->ni_nid;
2790 if (LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND)
2791 cfg_ni->lic_status = LNET_NI_STATUS_UP;
2793 cfg_ni->lic_status = ni->ni_status->ns_status;
2794 cfg_ni->lic_tcp_bonding = use_tcp_bonding;
2795 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
2797 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
2800 stats->iel_send_count = lnet_sum_stats(&ni->ni_stats,
2801 LNET_STATS_TYPE_SEND);
2802 stats->iel_recv_count = lnet_sum_stats(&ni->ni_stats,
2803 LNET_STATS_TYPE_RECV);
2804 stats->iel_drop_count = lnet_sum_stats(&ni->ni_stats,
2805 LNET_STATS_TYPE_DROP);
2809 * tun->lt_tun will always be present, but in order to be
2810 * backwards compatible, we need to deal with the cases when
2811 * tun->lt_tun is smaller than what the kernel has, because it
2812 * comes from an older version of a userspace program, then we'll
2813 * need to copy as much information as we have available space.
2815 min_size = tun_size - sizeof(tun->lt_cmn);
2816 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
2818 /* copy over the cpts */
2819 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
2820 ni->ni_cpts == NULL) {
2821 for (i = 0; i < ni->ni_ncpts; i++)
2822 cfg_ni->lic_cpts[i] = i;
2825 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
2826 i < LNET_MAX_SHOW_NUM_CPT;
2828 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
2830 cfg_ni->lic_ncpts = ni->ni_ncpts;
2834 * NOTE: This is a legacy function left in the code to be backwards
2835 * compatible with older userspace programs. It should eventually be
2838 * Grabs the ni data from the ni structure and fills the out
2841 * \param[in] ni network interface structure
2842 * \param[out] config config information
2845 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
2846 struct lnet_ioctl_config_data *config)
2848 struct lnet_ioctl_net_config *net_config;
2849 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
2850 size_t min_size, tunable_size = 0;
2856 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
2860 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
2861 ARRAY_SIZE(net_config->ni_interfaces));
2863 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2864 if (!ni->ni_interfaces[i])
2867 strncpy(net_config->ni_interfaces[i],
2868 ni->ni_interfaces[i],
2869 sizeof(net_config->ni_interfaces[i]));
2872 config->cfg_nid = ni->ni_nid;
2873 config->cfg_config_u.cfg_net.net_peer_timeout =
2874 ni->ni_net->net_tunables.lct_peer_timeout;
2875 config->cfg_config_u.cfg_net.net_max_tx_credits =
2876 ni->ni_net->net_tunables.lct_max_tx_credits;
2877 config->cfg_config_u.cfg_net.net_peer_tx_credits =
2878 ni->ni_net->net_tunables.lct_peer_tx_credits;
2879 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
2880 ni->ni_net->net_tunables.lct_peer_rtr_credits;
2882 if (LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND)
2883 net_config->ni_status = LNET_NI_STATUS_UP;
2885 net_config->ni_status = ni->ni_status->ns_status;
2888 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
2890 for (i = 0; i < num_cpts; i++)
2891 net_config->ni_cpts[i] = ni->ni_cpts[i];
2893 config->cfg_ncpts = num_cpts;
2897 * See if user land tools sent in a newer and larger version
2898 * of struct lnet_tunables than what the kernel uses.
2900 min_size = sizeof(*config) + sizeof(*net_config);
2902 if (config->cfg_hdr.ioc_len > min_size)
2903 tunable_size = config->cfg_hdr.ioc_len - min_size;
2905 /* Don't copy too much data to user space */
2906 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
2907 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
2909 if (lnd_cfg && min_size) {
2910 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
2911 config->cfg_config_u.cfg_net.net_interface_count = 1;
2913 /* Tell user land that kernel side has less data */
2914 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
2915 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
2916 config->cfg_hdr.ioc_len -= min_size;
2922 lnet_get_ni_idx_locked(int idx)
2925 struct lnet_net *net;
2927 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
2928 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
2938 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
2941 struct lnet_net *net = mynet;
2944 * It is possible that the net has been cleaned out while there is
2945 * a message being sent. This function accessed the net without
2946 * checking if the list is empty
2950 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
2952 if (list_empty(&net->net_ni_list))
2954 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2960 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
2961 /* if you reached the end of the ni list and the net is
2962 * specified, then there are no more nis in that net */
2966 /* we reached the end of this net ni list. move to the
2968 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
2969 /* no more nets and no more NIs. */
2972 /* get the next net */
2973 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
2975 if (list_empty(&net->net_ni_list))
2977 /* get the ni on it */
2978 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2984 if (list_empty(&prev->ni_netlist))
2987 /* there are more nis left */
2988 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
2994 lnet_get_net_config(struct lnet_ioctl_config_data *config)
2999 int idx = config->cfg_count;
3001 cpt = lnet_net_lock_current();
3003 ni = lnet_get_ni_idx_locked(idx);
3008 lnet_fill_ni_info_legacy(ni, config);
3012 lnet_net_unlock(cpt);
3017 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
3018 struct lnet_ioctl_config_lnd_tunables *tun,
3019 struct lnet_ioctl_element_stats *stats,
3026 if (!cfg_ni || !tun || !stats)
3029 cpt = lnet_net_lock_current();
3031 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
3036 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
3040 lnet_net_unlock(cpt);
3044 int lnet_get_ni_stats(struct lnet_ioctl_element_msg_stats *msg_stats)
3053 cpt = lnet_net_lock_current();
3055 ni = lnet_get_ni_idx_locked(msg_stats->im_idx);
3058 lnet_usr_translate_stats(msg_stats, &ni->ni_stats);
3062 lnet_net_unlock(cpt);
3067 static int lnet_add_net_common(struct lnet_net *net,
3068 struct lnet_ioctl_config_lnd_tunables *tun)
3071 struct lnet_ping_buffer *pbuf;
3072 struct lnet_handle_md ping_mdh;
3074 struct lnet_remotenet *rnet;
3076 int num_acceptor_nets;
3078 lnet_net_lock(LNET_LOCK_EX);
3079 rnet = lnet_find_rnet_locked(net->net_id);
3080 lnet_net_unlock(LNET_LOCK_EX);
3082 * make sure that the net added doesn't invalidate the current
3083 * configuration LNet is keeping
3086 CERROR("Adding net %s will invalidate routing configuration\n",
3087 libcfs_net2str(net->net_id));
3093 * make sure you calculate the correct number of slots in the ping
3094 * buffer. Since the ping info is a flattened list of all the NIs,
3095 * we should allocate enough slots to accomodate the number of NIs
3096 * which will be added.
3098 * since ni hasn't been configured yet, use
3099 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
3101 net_ni_count = lnet_get_net_ni_count_pre(net);
3103 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3104 net_ni_count + lnet_get_ni_count(),
3112 memcpy(&net->net_tunables,
3113 &tun->lt_cmn, sizeof(net->net_tunables));
3115 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
3118 * before starting this network get a count of the current TCP
3119 * networks which require the acceptor thread running. If that
3120 * count is == 0 before we start up this network, then we'd want to
3121 * start up the acceptor thread after starting up this network
3123 num_acceptor_nets = lnet_count_acceptor_nets();
3125 net_id = net->net_id;
3127 rc = lnet_startup_lndnet(net,
3128 (tun) ? &tun->lt_tun : NULL);
3132 lnet_net_lock(LNET_LOCK_EX);
3133 net = lnet_get_net_locked(net_id);
3134 lnet_net_unlock(LNET_LOCK_EX);
3139 * Start the acceptor thread if this is the first network
3140 * being added that requires the thread.
3142 if (net->net_lnd->lnd_accept && num_acceptor_nets == 0) {
3143 rc = lnet_acceptor_start();
3145 /* shutdown the net that we just started */
3146 CERROR("Failed to start up acceptor thread\n");
3147 lnet_shutdown_lndnet(net);
3152 lnet_net_lock(LNET_LOCK_EX);
3153 lnet_peer_net_added(net);
3154 lnet_net_unlock(LNET_LOCK_EX);
3156 lnet_ping_target_update(pbuf, ping_mdh);
3161 lnet_ping_md_unlink(pbuf, &ping_mdh);
3162 lnet_ping_buffer_decref(pbuf);
3166 static int lnet_handle_legacy_ip2nets(char *ip2nets,
3167 struct lnet_ioctl_config_lnd_tunables *tun)
3169 struct lnet_net *net;
3172 struct list_head net_head;
3174 INIT_LIST_HEAD(&net_head);
3176 rc = lnet_parse_ip2nets(&nets, ip2nets);
3180 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
3184 mutex_lock(&the_lnet.ln_api_mutex);
3185 while (!list_empty(&net_head)) {
3186 net = list_entry(net_head.next, struct lnet_net, net_list);
3187 list_del_init(&net->net_list);
3188 rc = lnet_add_net_common(net, tun);
3194 mutex_unlock(&the_lnet.ln_api_mutex);
3196 while (!list_empty(&net_head)) {
3197 net = list_entry(net_head.next, struct lnet_net, net_list);
3198 list_del_init(&net->net_list);
3204 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
3206 struct lnet_net *net;
3208 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3210 __u32 net_id, lnd_type;
3212 /* get the tunables if they are available */
3213 if (conf->lic_cfg_hdr.ioc_len >=
3214 sizeof(*conf) + sizeof(*tun))
3215 tun = (struct lnet_ioctl_config_lnd_tunables *)
3218 /* handle legacy ip2nets from DLC */
3219 if (conf->lic_legacy_ip2nets[0] != '\0')
3220 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
3223 net_id = LNET_NIDNET(conf->lic_nid);
3224 lnd_type = LNET_NETTYP(net_id);
3226 if (!libcfs_isknown_lnd(lnd_type)) {
3227 CERROR("No valid net and lnd information provided\n");
3231 net = lnet_net_alloc(net_id, NULL);
3235 for (i = 0; i < conf->lic_ncpts; i++) {
3236 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
3240 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
3241 conf->lic_ni_intf[0]);
3245 mutex_lock(&the_lnet.ln_api_mutex);
3247 rc = lnet_add_net_common(net, tun);
3249 mutex_unlock(&the_lnet.ln_api_mutex);
3254 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
3256 struct lnet_net *net;
3258 __u32 net_id = LNET_NIDNET(conf->lic_nid);
3259 struct lnet_ping_buffer *pbuf;
3260 struct lnet_handle_md ping_mdh;
3265 /* don't allow userspace to shutdown the LOLND */
3266 if (LNET_NETTYP(net_id) == LOLND)
3269 mutex_lock(&the_lnet.ln_api_mutex);
3273 net = lnet_get_net_locked(net_id);
3275 CERROR("net %s not found\n",
3276 libcfs_net2str(net_id));
3281 addr = LNET_NIDADDR(conf->lic_nid);
3283 /* remove the entire net */
3284 net_count = lnet_get_net_ni_count_locked(net);
3288 /* create and link a new ping info, before removing the old one */
3289 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3290 lnet_get_ni_count() - net_count,
3293 goto unlock_api_mutex;
3295 lnet_shutdown_lndnet(net);
3297 if (lnet_count_acceptor_nets() == 0)
3298 lnet_acceptor_stop();
3300 lnet_ping_target_update(pbuf, ping_mdh);
3302 goto unlock_api_mutex;
3305 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
3307 CERROR("nid %s not found\n",
3308 libcfs_nid2str(conf->lic_nid));
3313 net_count = lnet_get_net_ni_count_locked(net);
3317 /* create and link a new ping info, before removing the old one */
3318 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3319 lnet_get_ni_count() - 1, false);
3321 goto unlock_api_mutex;
3323 lnet_shutdown_lndni(ni);
3325 if (lnet_count_acceptor_nets() == 0)
3326 lnet_acceptor_stop();
3328 lnet_ping_target_update(pbuf, ping_mdh);
3330 /* check if the net is empty and remove it if it is */
3332 lnet_shutdown_lndnet(net);
3334 goto unlock_api_mutex;
3339 mutex_unlock(&the_lnet.ln_api_mutex);
3345 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
3346 * They are only expected to be called for unique networks.
3347 * That can be as a result of older DLC library
3348 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
3351 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
3353 struct lnet_net *net;
3354 struct list_head net_head;
3356 struct lnet_ioctl_config_lnd_tunables tun;
3357 char *nets = conf->cfg_config_u.cfg_net.net_intf;
3359 INIT_LIST_HEAD(&net_head);
3361 /* Create a net/ni structures for the network string */
3362 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
3364 return rc == 0 ? -EINVAL : rc;
3366 mutex_lock(&the_lnet.ln_api_mutex);
3369 rc = -EINVAL; /* only add one network per call */
3370 goto out_unlock_clean;
3373 net = list_entry(net_head.next, struct lnet_net, net_list);
3374 list_del_init(&net->net_list);
3376 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
3378 memset(&tun, 0, sizeof(tun));
3380 tun.lt_cmn.lct_peer_timeout =
3381 conf->cfg_config_u.cfg_net.net_peer_timeout;
3382 tun.lt_cmn.lct_peer_tx_credits =
3383 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
3384 tun.lt_cmn.lct_peer_rtr_credits =
3385 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
3386 tun.lt_cmn.lct_max_tx_credits =
3387 conf->cfg_config_u.cfg_net.net_max_tx_credits;
3389 rc = lnet_add_net_common(net, &tun);
3392 mutex_unlock(&the_lnet.ln_api_mutex);
3393 while (!list_empty(&net_head)) {
3394 /* net_head list is empty in success case */
3395 net = list_entry(net_head.next, struct lnet_net, net_list);
3396 list_del_init(&net->net_list);
3403 lnet_dyn_del_net(__u32 net_id)
3405 struct lnet_net *net;
3406 struct lnet_ping_buffer *pbuf;
3407 struct lnet_handle_md ping_mdh;
3411 /* don't allow userspace to shutdown the LOLND */
3412 if (LNET_NETTYP(net_id) == LOLND)
3415 mutex_lock(&the_lnet.ln_api_mutex);
3419 net = lnet_get_net_locked(net_id);
3426 net_ni_count = lnet_get_net_ni_count_locked(net);
3430 /* create and link a new ping info, before removing the old one */
3431 rc = lnet_ping_target_setup(&pbuf, &ping_mdh,
3432 lnet_get_ni_count() - net_ni_count, false);
3436 lnet_shutdown_lndnet(net);
3438 if (lnet_count_acceptor_nets() == 0)
3439 lnet_acceptor_stop();
3441 lnet_ping_target_update(pbuf, ping_mdh);
3444 mutex_unlock(&the_lnet.ln_api_mutex);
3449 void lnet_incr_dlc_seq(void)
3451 atomic_inc(&lnet_dlc_seq_no);
3454 __u32 lnet_get_dlc_seq_locked(void)
3456 return atomic_read(&lnet_dlc_seq_no);
3460 lnet_ni_set_healthv(lnet_nid_t nid, int value, bool all)
3462 struct lnet_net *net;
3465 lnet_net_lock(LNET_LOCK_EX);
3466 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3467 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3468 if (ni->ni_nid == nid || all) {
3469 atomic_set(&ni->ni_healthv, value);
3470 if (list_empty(&ni->ni_recovery) &&
3471 value < LNET_MAX_HEALTH_VALUE) {
3472 CERROR("manually adding local NI %s to recovery\n",
3473 libcfs_nid2str(ni->ni_nid));
3474 list_add_tail(&ni->ni_recovery,
3475 &the_lnet.ln_mt_localNIRecovq);
3476 lnet_ni_addref_locked(ni, 0);
3479 lnet_net_unlock(LNET_LOCK_EX);
3485 lnet_net_unlock(LNET_LOCK_EX);
3489 lnet_get_local_ni_hstats(struct lnet_ioctl_local_ni_hstats *stats)
3493 lnet_nid_t nid = stats->hlni_nid;
3495 cpt = lnet_net_lock_current();
3496 ni = lnet_nid2ni_locked(nid, cpt);
3503 stats->hlni_local_interrupt = atomic_read(&ni->ni_hstats.hlt_local_interrupt);
3504 stats->hlni_local_dropped = atomic_read(&ni->ni_hstats.hlt_local_dropped);
3505 stats->hlni_local_aborted = atomic_read(&ni->ni_hstats.hlt_local_aborted);
3506 stats->hlni_local_no_route = atomic_read(&ni->ni_hstats.hlt_local_no_route);
3507 stats->hlni_local_timeout = atomic_read(&ni->ni_hstats.hlt_local_timeout);
3508 stats->hlni_local_error = atomic_read(&ni->ni_hstats.hlt_local_error);
3509 stats->hlni_health_value = atomic_read(&ni->ni_healthv);
3512 lnet_net_unlock(cpt);
3518 lnet_get_local_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3523 lnet_net_lock(LNET_LOCK_EX);
3524 list_for_each_entry(ni, &the_lnet.ln_mt_localNIRecovq, ni_recovery) {
3525 list->rlst_nid_array[i] = ni->ni_nid;
3527 if (i >= LNET_MAX_SHOW_NUM_NID)
3530 lnet_net_unlock(LNET_LOCK_EX);
3531 list->rlst_num_nids = i;
3537 lnet_get_peer_ni_recovery_list(struct lnet_ioctl_recovery_list *list)
3539 struct lnet_peer_ni *lpni;
3542 lnet_net_lock(LNET_LOCK_EX);
3543 list_for_each_entry(lpni, &the_lnet.ln_mt_peerNIRecovq, lpni_recovery) {
3544 list->rlst_nid_array[i] = lpni->lpni_nid;
3546 if (i >= LNET_MAX_SHOW_NUM_NID)
3549 lnet_net_unlock(LNET_LOCK_EX);
3550 list->rlst_num_nids = i;
3556 * LNet ioctl handler.
3560 LNetCtl(unsigned int cmd, void *arg)
3562 struct libcfs_ioctl_data *data = arg;
3563 struct lnet_ioctl_config_data *config;
3564 struct lnet_process_id id = {0};
3568 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
3569 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
3572 case IOC_LIBCFS_GET_NI:
3573 rc = LNetGetId(data->ioc_count, &id);
3574 data->ioc_nid = id.nid;
3577 case IOC_LIBCFS_FAIL_NID:
3578 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
3580 case IOC_LIBCFS_ADD_ROUTE: {
3581 /* default router sensitivity to 1 */
3582 unsigned int sensitivity = 1;
3585 if (config->cfg_hdr.ioc_len < sizeof(*config))
3588 if (config->cfg_config_u.cfg_route.rtr_sensitivity) {
3590 config->cfg_config_u.cfg_route.rtr_sensitivity;
3593 mutex_lock(&the_lnet.ln_api_mutex);
3594 rc = lnet_add_route(config->cfg_net,
3595 config->cfg_config_u.cfg_route.rtr_hop,
3597 config->cfg_config_u.cfg_route.
3598 rtr_priority, sensitivity);
3599 mutex_unlock(&the_lnet.ln_api_mutex);
3603 case IOC_LIBCFS_DEL_ROUTE:
3606 if (config->cfg_hdr.ioc_len < sizeof(*config))
3609 mutex_lock(&the_lnet.ln_api_mutex);
3610 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
3611 mutex_unlock(&the_lnet.ln_api_mutex);
3614 case IOC_LIBCFS_GET_ROUTE:
3617 if (config->cfg_hdr.ioc_len < sizeof(*config))
3620 mutex_lock(&the_lnet.ln_api_mutex);
3621 rc = lnet_get_route(config->cfg_count,
3623 &config->cfg_config_u.cfg_route.rtr_hop,
3625 &config->cfg_config_u.cfg_route.rtr_flags,
3626 &config->cfg_config_u.cfg_route.
3628 &config->cfg_config_u.cfg_route.
3630 mutex_unlock(&the_lnet.ln_api_mutex);
3633 case IOC_LIBCFS_GET_LOCAL_NI: {
3634 struct lnet_ioctl_config_ni *cfg_ni;
3635 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
3636 struct lnet_ioctl_element_stats *stats;
3641 /* get the tunables if they are available */
3642 if (cfg_ni->lic_cfg_hdr.ioc_len <
3643 sizeof(*cfg_ni) + sizeof(*stats) + sizeof(*tun))
3646 stats = (struct lnet_ioctl_element_stats *)
3648 tun = (struct lnet_ioctl_config_lnd_tunables *)
3649 (cfg_ni->lic_bulk + sizeof(*stats));
3651 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
3654 mutex_lock(&the_lnet.ln_api_mutex);
3655 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
3656 mutex_unlock(&the_lnet.ln_api_mutex);
3660 case IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS: {
3661 struct lnet_ioctl_element_msg_stats *msg_stats = arg;
3663 if (msg_stats->im_hdr.ioc_len != sizeof(*msg_stats))
3666 mutex_lock(&the_lnet.ln_api_mutex);
3667 rc = lnet_get_ni_stats(msg_stats);
3668 mutex_unlock(&the_lnet.ln_api_mutex);
3673 case IOC_LIBCFS_GET_NET: {
3674 size_t total = sizeof(*config) +
3675 sizeof(struct lnet_ioctl_net_config);
3678 if (config->cfg_hdr.ioc_len < total)
3681 mutex_lock(&the_lnet.ln_api_mutex);
3682 rc = lnet_get_net_config(config);
3683 mutex_unlock(&the_lnet.ln_api_mutex);
3687 case IOC_LIBCFS_GET_LNET_STATS:
3689 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
3691 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
3694 mutex_lock(&the_lnet.ln_api_mutex);
3695 lnet_counters_get(&lnet_stats->st_cntrs);
3696 mutex_unlock(&the_lnet.ln_api_mutex);
3700 case IOC_LIBCFS_CONFIG_RTR:
3703 if (config->cfg_hdr.ioc_len < sizeof(*config))
3706 mutex_lock(&the_lnet.ln_api_mutex);
3707 if (config->cfg_config_u.cfg_buffers.buf_enable) {
3708 rc = lnet_rtrpools_enable();
3709 mutex_unlock(&the_lnet.ln_api_mutex);
3712 lnet_rtrpools_disable();
3713 mutex_unlock(&the_lnet.ln_api_mutex);
3716 case IOC_LIBCFS_ADD_BUF:
3719 if (config->cfg_hdr.ioc_len < sizeof(*config))
3722 mutex_lock(&the_lnet.ln_api_mutex);
3723 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
3725 config->cfg_config_u.cfg_buffers.
3727 config->cfg_config_u.cfg_buffers.
3729 mutex_unlock(&the_lnet.ln_api_mutex);
3732 case IOC_LIBCFS_SET_NUMA_RANGE: {
3733 struct lnet_ioctl_set_value *numa;
3735 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3737 lnet_net_lock(LNET_LOCK_EX);
3738 lnet_numa_range = numa->sv_value;
3739 lnet_net_unlock(LNET_LOCK_EX);
3743 case IOC_LIBCFS_GET_NUMA_RANGE: {
3744 struct lnet_ioctl_set_value *numa;
3746 if (numa->sv_hdr.ioc_len != sizeof(*numa))
3748 numa->sv_value = lnet_numa_range;
3752 case IOC_LIBCFS_GET_BUF: {
3753 struct lnet_ioctl_pool_cfg *pool_cfg;
3754 size_t total = sizeof(*config) + sizeof(*pool_cfg);
3758 if (config->cfg_hdr.ioc_len < total)
3761 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
3763 mutex_lock(&the_lnet.ln_api_mutex);
3764 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
3765 mutex_unlock(&the_lnet.ln_api_mutex);
3769 case IOC_LIBCFS_GET_LOCAL_HSTATS: {
3770 struct lnet_ioctl_local_ni_hstats *stats = arg;
3772 if (stats->hlni_hdr.ioc_len < sizeof(*stats))
3775 mutex_lock(&the_lnet.ln_api_mutex);
3776 rc = lnet_get_local_ni_hstats(stats);
3777 mutex_unlock(&the_lnet.ln_api_mutex);
3782 case IOC_LIBCFS_GET_RECOVERY_QUEUE: {
3783 struct lnet_ioctl_recovery_list *list = arg;
3784 if (list->rlst_hdr.ioc_len < sizeof(*list))
3787 mutex_lock(&the_lnet.ln_api_mutex);
3788 if (list->rlst_type == LNET_HEALTH_TYPE_LOCAL_NI)
3789 rc = lnet_get_local_ni_recovery_list(list);
3791 rc = lnet_get_peer_ni_recovery_list(list);
3792 mutex_unlock(&the_lnet.ln_api_mutex);
3796 case IOC_LIBCFS_ADD_PEER_NI: {
3797 struct lnet_ioctl_peer_cfg *cfg = arg;
3799 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3802 mutex_lock(&the_lnet.ln_api_mutex);
3803 rc = lnet_add_peer_ni(cfg->prcfg_prim_nid,
3806 mutex_unlock(&the_lnet.ln_api_mutex);
3810 case IOC_LIBCFS_DEL_PEER_NI: {
3811 struct lnet_ioctl_peer_cfg *cfg = arg;
3813 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3816 mutex_lock(&the_lnet.ln_api_mutex);
3817 rc = lnet_del_peer_ni(cfg->prcfg_prim_nid,
3818 cfg->prcfg_cfg_nid);
3819 mutex_unlock(&the_lnet.ln_api_mutex);
3823 case IOC_LIBCFS_GET_PEER_INFO: {
3824 struct lnet_ioctl_peer *peer_info = arg;
3826 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
3829 mutex_lock(&the_lnet.ln_api_mutex);
3830 rc = lnet_get_peer_ni_info(
3831 peer_info->pr_count,
3833 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
3834 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
3835 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
3836 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
3837 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
3838 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
3839 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
3840 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
3841 mutex_unlock(&the_lnet.ln_api_mutex);
3845 case IOC_LIBCFS_GET_PEER_NI: {
3846 struct lnet_ioctl_peer_cfg *cfg = arg;
3848 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3851 mutex_lock(&the_lnet.ln_api_mutex);
3852 rc = lnet_get_peer_info(cfg,
3853 (void __user *)cfg->prcfg_bulk);
3854 mutex_unlock(&the_lnet.ln_api_mutex);
3858 case IOC_LIBCFS_GET_PEER_LIST: {
3859 struct lnet_ioctl_peer_cfg *cfg = arg;
3861 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
3864 mutex_lock(&the_lnet.ln_api_mutex);
3865 rc = lnet_get_peer_list(&cfg->prcfg_count, &cfg->prcfg_size,
3866 (struct lnet_process_id __user *)cfg->prcfg_bulk);
3867 mutex_unlock(&the_lnet.ln_api_mutex);
3871 case IOC_LIBCFS_SET_HEALHV: {
3872 struct lnet_ioctl_reset_health_cfg *cfg = arg;
3874 if (cfg->rh_hdr.ioc_len < sizeof(*cfg))
3876 if (cfg->rh_value < 0 ||
3877 cfg->rh_value > LNET_MAX_HEALTH_VALUE)
3878 value = LNET_MAX_HEALTH_VALUE;
3880 value = cfg->rh_value;
3881 CDEBUG(D_NET, "Manually setting healthv to %d for %s:%s. all = %d\n",
3882 value, (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI) ?
3883 "local" : "peer", libcfs_nid2str(cfg->rh_nid), cfg->rh_all);
3884 mutex_lock(&the_lnet.ln_api_mutex);
3885 if (cfg->rh_type == LNET_HEALTH_TYPE_LOCAL_NI)
3886 lnet_ni_set_healthv(cfg->rh_nid, value,
3889 lnet_peer_ni_set_healthv(cfg->rh_nid, value,
3891 mutex_unlock(&the_lnet.ln_api_mutex);
3895 case IOC_LIBCFS_NOTIFY_ROUTER: {
3896 time64_t deadline = ktime_get_real_seconds() - data->ioc_u64[0];
3898 /* The deadline passed in by the user should be some time in
3899 * seconds in the future since the UNIX epoch. We have to map
3900 * that deadline to the wall clock.
3902 deadline += ktime_get_seconds();
3903 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags, false,
3907 case IOC_LIBCFS_LNET_DIST:
3908 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
3909 if (rc < 0 && rc != -EHOSTUNREACH)
3912 data->ioc_u32[0] = rc;
3915 case IOC_LIBCFS_TESTPROTOCOMPAT:
3916 lnet_net_lock(LNET_LOCK_EX);
3917 the_lnet.ln_testprotocompat = data->ioc_flags;
3918 lnet_net_unlock(LNET_LOCK_EX);
3921 case IOC_LIBCFS_LNET_FAULT:
3922 return lnet_fault_ctl(data->ioc_flags, data);
3924 case IOC_LIBCFS_PING: {
3925 signed long timeout;
3927 id.nid = data->ioc_nid;
3928 id.pid = data->ioc_u32[0];
3930 /* If timeout is negative then set default of 3 minutes */
3931 if (((s32)data->ioc_u32[1] <= 0) ||
3932 data->ioc_u32[1] > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
3933 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
3935 timeout = nsecs_to_jiffies(data->ioc_u32[1] * NSEC_PER_MSEC);
3937 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
3938 data->ioc_plen1 / sizeof(struct lnet_process_id));
3943 data->ioc_count = rc;
3947 case IOC_LIBCFS_PING_PEER: {
3948 struct lnet_ioctl_ping_data *ping = arg;
3949 struct lnet_peer *lp;
3950 signed long timeout;
3952 /* If timeout is negative then set default of 3 minutes */
3953 if (((s32)ping->op_param) <= 0 ||
3954 ping->op_param > (DEFAULT_PEER_TIMEOUT * MSEC_PER_SEC))
3955 timeout = cfs_time_seconds(DEFAULT_PEER_TIMEOUT);
3957 timeout = nsecs_to_jiffies(ping->op_param * NSEC_PER_MSEC);
3959 rc = lnet_ping(ping->ping_id, timeout,
3965 mutex_lock(&the_lnet.ln_api_mutex);
3966 lp = lnet_find_peer(ping->ping_id.nid);
3968 ping->ping_id.nid = lp->lp_primary_nid;
3969 ping->mr_info = lnet_peer_is_multi_rail(lp);
3970 lnet_peer_decref_locked(lp);
3972 mutex_unlock(&the_lnet.ln_api_mutex);
3974 ping->ping_count = rc;
3978 case IOC_LIBCFS_DISCOVER: {
3979 struct lnet_ioctl_ping_data *discover = arg;
3980 struct lnet_peer *lp;
3982 rc = lnet_discover(discover->ping_id, discover->op_param,
3984 discover->ping_count);
3988 mutex_lock(&the_lnet.ln_api_mutex);
3989 lp = lnet_find_peer(discover->ping_id.nid);
3991 discover->ping_id.nid = lp->lp_primary_nid;
3992 discover->mr_info = lnet_peer_is_multi_rail(lp);
3993 lnet_peer_decref_locked(lp);
3995 mutex_unlock(&the_lnet.ln_api_mutex);
3997 discover->ping_count = rc;
4002 ni = lnet_net2ni_addref(data->ioc_net);
4006 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
4009 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
4016 EXPORT_SYMBOL(LNetCtl);
4018 void LNetDebugPeer(struct lnet_process_id id)
4020 lnet_debug_peer(id.nid);
4022 EXPORT_SYMBOL(LNetDebugPeer);
4025 * Determine if the specified peer \a nid is on the local node.
4027 * \param nid peer nid to check
4029 * \retval true If peer NID is on the local node.
4030 * \retval false If peer NID is not on the local node.
4032 bool LNetIsPeerLocal(lnet_nid_t nid)
4034 struct lnet_net *net;
4038 cpt = lnet_net_lock_current();
4039 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4040 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4041 if (ni->ni_nid == nid) {
4042 lnet_net_unlock(cpt);
4047 lnet_net_unlock(cpt);
4051 EXPORT_SYMBOL(LNetIsPeerLocal);
4054 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
4055 * Note that all interfaces share a same PID, as requested by LNetNIInit().
4057 * \param index Index of the interface to look up.
4058 * \param id On successful return, this location will hold the
4059 * struct lnet_process_id ID of the interface.
4061 * \retval 0 If an interface exists at \a index.
4062 * \retval -ENOENT If no interface has been found.
4065 LNetGetId(unsigned int index, struct lnet_process_id *id)
4068 struct lnet_net *net;
4072 LASSERT(the_lnet.ln_refcount > 0);
4074 cpt = lnet_net_lock_current();
4076 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
4077 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
4081 id->nid = ni->ni_nid;
4082 id->pid = the_lnet.ln_pid;
4088 lnet_net_unlock(cpt);
4091 EXPORT_SYMBOL(LNetGetId);
4093 static int lnet_ping(struct lnet_process_id id, signed long timeout,
4094 struct lnet_process_id __user *ids, int n_ids)
4096 struct lnet_handle_eq eqh;
4097 struct lnet_handle_md mdh;
4098 struct lnet_event event;
4099 struct lnet_md md = { NULL };
4103 const signed long a_long_time = cfs_time_seconds(60);
4104 struct lnet_ping_buffer *pbuf;
4105 struct lnet_process_id tmpid;
4112 /* n_ids limit is arbitrary */
4113 if (n_ids <= 0 || id.nid == LNET_NID_ANY)
4117 * if the user buffer has more space than the lnet_interfaces_max
4118 * then only fill it up to lnet_interfaces_max
4120 if (n_ids > lnet_interfaces_max)
4121 n_ids = lnet_interfaces_max;
4123 if (id.pid == LNET_PID_ANY)
4124 id.pid = LNET_PID_LUSTRE;
4126 pbuf = lnet_ping_buffer_alloc(n_ids, GFP_NOFS);
4130 /* NB 2 events max (including any unlink event) */
4131 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
4133 CERROR("Can't allocate EQ: %d\n", rc);
4134 goto fail_ping_buffer_decref;
4137 /* initialize md content */
4138 md.start = &pbuf->pb_info;
4139 md.length = LNET_PING_INFO_SIZE(n_ids);
4140 md.threshold = 2; /* GET/REPLY */
4142 md.options = LNET_MD_TRUNCATE;
4146 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
4148 CERROR("Can't bind MD: %d\n", rc);
4152 rc = LNetGet(LNET_NID_ANY, mdh, id,
4153 LNET_RESERVED_PORTAL,
4154 LNET_PROTO_PING_MATCHBITS, 0, false);
4157 /* Don't CERROR; this could be deliberate! */
4158 rc2 = LNetMDUnlink(mdh);
4161 /* NB must wait for the UNLINK event below... */
4163 timeout = a_long_time;
4167 /* MUST block for unlink to complete */
4169 blocked = cfs_block_allsigs();
4171 rc2 = LNetEQPoll(&eqh, 1, timeout, &event, &which);
4174 cfs_restore_sigs(blocked);
4176 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
4177 (rc2 <= 0) ? -1 : event.type,
4178 (rc2 <= 0) ? -1 : event.status,
4179 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
4181 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
4183 if (rc2 <= 0 || event.status != 0) {
4184 /* timeout or error */
4185 if (!replied && rc == 0)
4186 rc = (rc2 < 0) ? rc2 :
4187 (rc2 == 0) ? -ETIMEDOUT :
4191 /* Ensure completion in finite time... */
4193 /* No assertion (racing with network) */
4195 timeout = a_long_time;
4196 } else if (rc2 == 0) {
4197 /* timed out waiting for unlink */
4198 CWARN("ping %s: late network completion\n",
4201 } else if (event.type == LNET_EVENT_REPLY) {
4205 } while (rc2 <= 0 || !event.unlinked);
4209 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
4216 LASSERT(nob >= 0 && nob <= LNET_PING_INFO_SIZE(n_ids));
4218 rc = -EPROTO; /* if I can't parse... */
4221 CERROR("%s: ping info too short %d\n",
4222 libcfs_id2str(id), nob);
4226 if (pbuf->pb_info.pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
4227 lnet_swap_pinginfo(pbuf);
4228 } else if (pbuf->pb_info.pi_magic != LNET_PROTO_PING_MAGIC) {
4229 CERROR("%s: Unexpected magic %08x\n",
4230 libcfs_id2str(id), pbuf->pb_info.pi_magic);
4234 if ((pbuf->pb_info.pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
4235 CERROR("%s: ping w/o NI status: 0x%x\n",
4236 libcfs_id2str(id), pbuf->pb_info.pi_features);
4240 if (nob < LNET_PING_INFO_SIZE(0)) {
4241 CERROR("%s: Short reply %d(%d min)\n",
4243 nob, (int)LNET_PING_INFO_SIZE(0));
4247 if (pbuf->pb_info.pi_nnis < n_ids)
4248 n_ids = pbuf->pb_info.pi_nnis;
4250 if (nob < LNET_PING_INFO_SIZE(n_ids)) {
4251 CERROR("%s: Short reply %d(%d expected)\n",
4253 nob, (int)LNET_PING_INFO_SIZE(n_ids));
4257 rc = -EFAULT; /* if I segv in copy_to_user()... */
4259 memset(&tmpid, 0, sizeof(tmpid));
4260 for (i = 0; i < n_ids; i++) {
4261 tmpid.pid = pbuf->pb_info.pi_pid;
4262 tmpid.nid = pbuf->pb_info.pi_ni[i].ns_nid;
4263 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
4266 rc = pbuf->pb_info.pi_nnis;
4269 rc2 = LNetEQFree(eqh);
4271 CERROR("rc2 %d\n", rc2);
4274 fail_ping_buffer_decref:
4275 lnet_ping_buffer_decref(pbuf);
4280 lnet_discover(struct lnet_process_id id, __u32 force,
4281 struct lnet_process_id __user *ids, int n_ids)
4283 struct lnet_peer_ni *lpni;
4284 struct lnet_peer_ni *p;
4285 struct lnet_peer *lp;
4286 struct lnet_process_id *buf;
4290 int max_intf = lnet_interfaces_max;
4294 id.nid == LNET_NID_ANY)
4297 if (id.pid == LNET_PID_ANY)
4298 id.pid = LNET_PID_LUSTRE;
4301 * if the user buffer has more space than the max_intf
4302 * then only fill it up to max_intf
4304 if (n_ids > max_intf)
4307 buf_size = n_ids * sizeof(*buf);
4309 LIBCFS_ALLOC(buf, buf_size);
4313 cpt = lnet_net_lock_current();
4314 lpni = lnet_nid2peerni_locked(id.nid, LNET_NID_ANY, cpt);
4321 * Clearing the NIDS_UPTODATE flag ensures the peer will
4322 * be discovered, provided discovery has not been disabled.
4324 lp = lpni->lpni_peer_net->lpn_peer;
4325 spin_lock(&lp->lp_lock);
4326 lp->lp_state &= ~LNET_PEER_NIDS_UPTODATE;
4327 /* If the force flag is set, force a PING and PUSH as well. */
4329 lp->lp_state |= LNET_PEER_FORCE_PING | LNET_PEER_FORCE_PUSH;
4330 spin_unlock(&lp->lp_lock);
4331 rc = lnet_discover_peer_locked(lpni, cpt, true);
4335 /* Peer may have changed. */
4336 lp = lpni->lpni_peer_net->lpn_peer;
4337 if (lp->lp_nnis < n_ids)
4338 n_ids = lp->lp_nnis;
4342 while ((p = lnet_get_next_peer_ni_locked(lp, NULL, p)) != NULL) {
4343 buf[i].pid = id.pid;
4344 buf[i].nid = p->lpni_nid;
4349 lnet_net_unlock(cpt);
4352 if (copy_to_user(ids, buf, n_ids * sizeof(*buf)))
4358 lnet_peer_ni_decref_locked(lpni);
4360 lnet_net_unlock(cpt);
4362 LIBCFS_FREE(buf, buf_size);
4368 * Retrieve peer discovery status.
4370 * \retval 1 if lnet_peer_discovery_disabled is 0
4371 * \retval 0 if lnet_peer_discovery_disabled is 1
4374 LNetGetPeerDiscoveryStatus(void)
4376 return !lnet_peer_discovery_disabled;
4378 EXPORT_SYMBOL(LNetGetPeerDiscoveryStatus);