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, 2016, 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
34 #include <linux/log2.h>
35 #include <linux/ktime.h>
36 #include <linux/moduleparam.h>
38 #include <lnet/lib-lnet.h>
40 #define D_LNI D_CONSOLE
42 struct lnet the_lnet; /* THE state of the network */
43 EXPORT_SYMBOL(the_lnet);
45 static char *ip2nets = "";
46 module_param(ip2nets, charp, 0444);
47 MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
49 static char *networks = "";
50 module_param(networks, charp, 0444);
51 MODULE_PARM_DESC(networks, "local networks");
53 static char *routes = "";
54 module_param(routes, charp, 0444);
55 MODULE_PARM_DESC(routes, "routes to non-local networks");
57 static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
58 module_param(rnet_htable_size, int, 0444);
59 MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
61 static int use_tcp_bonding = false;
62 module_param(use_tcp_bonding, int, 0444);
63 MODULE_PARM_DESC(use_tcp_bonding,
64 "Set to 1 to use socklnd bonding. 0 to use Multi-Rail");
66 unsigned int lnet_numa_range = 0;
67 module_param(lnet_numa_range, uint, 0444);
68 MODULE_PARM_DESC(lnet_numa_range,
69 "NUMA range to consider during Multi-Rail selection");
71 static int lnet_interfaces_max = LNET_INTERFACES_MAX_DEFAULT;
72 static int intf_max_set(const char *val, struct kernel_param *kp);
73 module_param_call(lnet_interfaces_max, intf_max_set, param_get_int,
74 &lnet_interfaces_max, S_IRUGO|S_IWUSR);
75 MODULE_PARM_DESC(lnet_interfaces_max,
76 "Maximum number of interfaces in a node.");
79 * This sequence number keeps track of how many times DLC was used to
80 * update the local NIs. It is incremented when a NI is added or
81 * removed and checked when sending a message to determine if there is
82 * a need to re-run the selection algorithm. See lnet_select_pathway()
83 * for more details on its usage.
85 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
87 static int lnet_ping(struct lnet_process_id id, signed long timeout,
88 struct lnet_process_id __user *ids, int n_ids);
91 intf_max_set(const char *val, struct kernel_param *kp)
95 rc = kstrtoint(val, 0, &value);
97 CERROR("Invalid module parameter value for 'lnet_interfaces_max'\n");
101 if (value < LNET_INTERFACES_MIN) {
102 CWARN("max interfaces provided are too small, setting to %d\n",
103 LNET_INTERFACES_MIN);
104 value = LNET_INTERFACES_MIN;
107 *(int *)kp->arg = value;
113 lnet_get_routes(void)
119 lnet_get_networks(void)
124 if (*networks != 0 && *ip2nets != 0) {
125 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
126 "'ip2nets' but not both at once\n");
131 rc = lnet_parse_ip2nets(&nets, ip2nets);
132 return (rc == 0) ? nets : NULL;
142 lnet_init_locks(void)
144 spin_lock_init(&the_lnet.ln_eq_wait_lock);
145 init_waitqueue_head(&the_lnet.ln_eq_waitq);
146 init_waitqueue_head(&the_lnet.ln_rc_waitq);
147 mutex_init(&the_lnet.ln_lnd_mutex);
148 mutex_init(&the_lnet.ln_api_mutex);
152 lnet_fini_locks(void)
156 struct kmem_cache *lnet_mes_cachep; /* MEs kmem_cache */
157 struct kmem_cache *lnet_small_mds_cachep; /* <= LNET_SMALL_MD_SIZE bytes
161 lnet_descriptor_setup(void)
163 /* create specific kmem_cache for MEs and small MDs (i.e., originally
164 * allocated in <size-xxx> kmem_cache).
166 lnet_mes_cachep = kmem_cache_create("lnet_MEs", sizeof(struct lnet_me),
168 if (!lnet_mes_cachep)
171 lnet_small_mds_cachep = kmem_cache_create("lnet_small_MDs",
172 LNET_SMALL_MD_SIZE, 0, 0,
174 if (!lnet_small_mds_cachep)
181 lnet_descriptor_cleanup(void)
184 if (lnet_small_mds_cachep) {
185 kmem_cache_destroy(lnet_small_mds_cachep);
186 lnet_small_mds_cachep = NULL;
189 if (lnet_mes_cachep) {
190 kmem_cache_destroy(lnet_mes_cachep);
191 lnet_mes_cachep = NULL;
196 lnet_create_remote_nets_table(void)
199 struct list_head *hash;
201 LASSERT(the_lnet.ln_remote_nets_hash == NULL);
202 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
203 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
205 CERROR("Failed to create remote nets hash table\n");
209 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
210 INIT_LIST_HEAD(&hash[i]);
211 the_lnet.ln_remote_nets_hash = hash;
216 lnet_destroy_remote_nets_table(void)
220 if (the_lnet.ln_remote_nets_hash == NULL)
223 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
224 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
226 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
227 LNET_REMOTE_NETS_HASH_SIZE *
228 sizeof(the_lnet.ln_remote_nets_hash[0]));
229 the_lnet.ln_remote_nets_hash = NULL;
233 lnet_destroy_locks(void)
235 if (the_lnet.ln_res_lock != NULL) {
236 cfs_percpt_lock_free(the_lnet.ln_res_lock);
237 the_lnet.ln_res_lock = NULL;
240 if (the_lnet.ln_net_lock != NULL) {
241 cfs_percpt_lock_free(the_lnet.ln_net_lock);
242 the_lnet.ln_net_lock = NULL;
249 lnet_create_locks(void)
253 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
254 if (the_lnet.ln_res_lock == NULL)
257 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
258 if (the_lnet.ln_net_lock == NULL)
264 lnet_destroy_locks();
268 static void lnet_assert_wire_constants(void)
270 /* Wire protocol assertions generated by 'wirecheck'
271 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
272 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
273 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
276 CLASSERT(LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
277 CLASSERT(LNET_PROTO_TCP_VERSION_MAJOR == 1);
278 CLASSERT(LNET_PROTO_TCP_VERSION_MINOR == 0);
279 CLASSERT(LNET_MSG_ACK == 0);
280 CLASSERT(LNET_MSG_PUT == 1);
281 CLASSERT(LNET_MSG_GET == 2);
282 CLASSERT(LNET_MSG_REPLY == 3);
283 CLASSERT(LNET_MSG_HELLO == 4);
285 /* Checks for struct lnet_handle_wire */
286 CLASSERT((int)sizeof(struct lnet_handle_wire) == 16);
287 CLASSERT((int)offsetof(struct lnet_handle_wire, wh_interface_cookie) == 0);
288 CLASSERT((int)sizeof(((struct lnet_handle_wire *)0)->wh_interface_cookie) == 8);
289 CLASSERT((int)offsetof(struct lnet_handle_wire, wh_object_cookie) == 8);
290 CLASSERT((int)sizeof(((struct lnet_handle_wire *)0)->wh_object_cookie) == 8);
292 /* Checks for struct struct lnet_magicversion */
293 CLASSERT((int)sizeof(struct lnet_magicversion) == 8);
294 CLASSERT((int)offsetof(struct lnet_magicversion, magic) == 0);
295 CLASSERT((int)sizeof(((struct lnet_magicversion *)0)->magic) == 4);
296 CLASSERT((int)offsetof(struct lnet_magicversion, version_major) == 4);
297 CLASSERT((int)sizeof(((struct lnet_magicversion *)0)->version_major) == 2);
298 CLASSERT((int)offsetof(struct lnet_magicversion, version_minor) == 6);
299 CLASSERT((int)sizeof(((struct lnet_magicversion *)0)->version_minor) == 2);
301 /* Checks for struct struct lnet_hdr */
302 CLASSERT((int)sizeof(struct lnet_hdr) == 72);
303 CLASSERT((int)offsetof(struct lnet_hdr, dest_nid) == 0);
304 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->dest_nid) == 8);
305 CLASSERT((int)offsetof(struct lnet_hdr, src_nid) == 8);
306 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->src_nid) == 8);
307 CLASSERT((int)offsetof(struct lnet_hdr, dest_pid) == 16);
308 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->dest_pid) == 4);
309 CLASSERT((int)offsetof(struct lnet_hdr, src_pid) == 20);
310 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->src_pid) == 4);
311 CLASSERT((int)offsetof(struct lnet_hdr, type) == 24);
312 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->type) == 4);
313 CLASSERT((int)offsetof(struct lnet_hdr, payload_length) == 28);
314 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->payload_length) == 4);
315 CLASSERT((int)offsetof(struct lnet_hdr, msg) == 32);
316 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg) == 40);
319 CLASSERT((int)offsetof(struct lnet_hdr, msg.ack.dst_wmd) == 32);
320 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.ack.dst_wmd) == 16);
321 CLASSERT((int)offsetof(struct lnet_hdr, msg.ack.match_bits) == 48);
322 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.ack.match_bits) == 8);
323 CLASSERT((int)offsetof(struct lnet_hdr, msg.ack.mlength) == 56);
324 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.ack.mlength) == 4);
327 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.ack_wmd) == 32);
328 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.ack_wmd) == 16);
329 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.match_bits) == 48);
330 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.match_bits) == 8);
331 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.hdr_data) == 56);
332 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.hdr_data) == 8);
333 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.ptl_index) == 64);
334 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.ptl_index) == 4);
335 CLASSERT((int)offsetof(struct lnet_hdr, msg.put.offset) == 68);
336 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.put.offset) == 4);
339 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.return_wmd) == 32);
340 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.return_wmd) == 16);
341 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.match_bits) == 48);
342 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.match_bits) == 8);
343 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.ptl_index) == 56);
344 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.ptl_index) == 4);
345 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.src_offset) == 60);
346 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.src_offset) == 4);
347 CLASSERT((int)offsetof(struct lnet_hdr, msg.get.sink_length) == 64);
348 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.get.sink_length) == 4);
351 CLASSERT((int)offsetof(struct lnet_hdr, msg.reply.dst_wmd) == 32);
352 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.reply.dst_wmd) == 16);
355 CLASSERT((int)offsetof(struct lnet_hdr, msg.hello.incarnation) == 32);
356 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.hello.incarnation) == 8);
357 CLASSERT((int)offsetof(struct lnet_hdr, msg.hello.type) == 40);
358 CLASSERT((int)sizeof(((struct lnet_hdr *)0)->msg.hello.type) == 4);
361 static struct lnet_lnd *lnet_find_lnd_by_type(__u32 type)
363 struct lnet_lnd *lnd;
364 struct list_head *tmp;
366 /* holding lnd mutex */
367 list_for_each(tmp, &the_lnet.ln_lnds) {
368 lnd = list_entry(tmp, struct lnet_lnd, lnd_list);
370 if (lnd->lnd_type == type)
377 lnet_register_lnd(struct lnet_lnd *lnd)
379 mutex_lock(&the_lnet.ln_lnd_mutex);
381 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
382 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
384 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
385 lnd->lnd_refcount = 0;
387 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
389 mutex_unlock(&the_lnet.ln_lnd_mutex);
391 EXPORT_SYMBOL(lnet_register_lnd);
394 lnet_unregister_lnd(struct lnet_lnd *lnd)
396 mutex_lock(&the_lnet.ln_lnd_mutex);
398 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
399 LASSERT(lnd->lnd_refcount == 0);
401 list_del(&lnd->lnd_list);
402 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
404 mutex_unlock(&the_lnet.ln_lnd_mutex);
406 EXPORT_SYMBOL(lnet_unregister_lnd);
409 lnet_counters_get(struct lnet_counters *counters)
411 struct lnet_counters *ctr;
414 memset(counters, 0, sizeof(*counters));
416 lnet_net_lock(LNET_LOCK_EX);
418 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
419 counters->msgs_max += ctr->msgs_max;
420 counters->msgs_alloc += ctr->msgs_alloc;
421 counters->errors += ctr->errors;
422 counters->send_count += ctr->send_count;
423 counters->recv_count += ctr->recv_count;
424 counters->route_count += ctr->route_count;
425 counters->drop_count += ctr->drop_count;
426 counters->send_length += ctr->send_length;
427 counters->recv_length += ctr->recv_length;
428 counters->route_length += ctr->route_length;
429 counters->drop_length += ctr->drop_length;
432 lnet_net_unlock(LNET_LOCK_EX);
434 EXPORT_SYMBOL(lnet_counters_get);
437 lnet_counters_reset(void)
439 struct lnet_counters *counters;
442 lnet_net_lock(LNET_LOCK_EX);
444 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
445 memset(counters, 0, sizeof(struct lnet_counters));
447 lnet_net_unlock(LNET_LOCK_EX);
451 lnet_res_type2str(int type)
456 case LNET_COOKIE_TYPE_MD:
458 case LNET_COOKIE_TYPE_ME:
460 case LNET_COOKIE_TYPE_EQ:
466 lnet_res_container_cleanup(struct lnet_res_container *rec)
470 if (rec->rec_type == 0) /* not set yet, it's uninitialized */
473 while (!list_empty(&rec->rec_active)) {
474 struct list_head *e = rec->rec_active.next;
477 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
478 lnet_eq_free(list_entry(e, struct lnet_eq, eq_list));
480 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
481 lnet_md_free(list_entry(e, struct lnet_libmd, md_list));
483 } else { /* NB: Active MEs should be attached on portals */
490 /* Found alive MD/ME/EQ, user really should unlink/free
491 * all of them before finalize LNet, but if someone didn't,
492 * we have to recycle garbage for him */
493 CERROR("%d active elements on exit of %s container\n",
494 count, lnet_res_type2str(rec->rec_type));
497 if (rec->rec_lh_hash != NULL) {
498 LIBCFS_FREE(rec->rec_lh_hash,
499 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
500 rec->rec_lh_hash = NULL;
503 rec->rec_type = 0; /* mark it as finalized */
507 lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
512 LASSERT(rec->rec_type == 0);
514 rec->rec_type = type;
515 INIT_LIST_HEAD(&rec->rec_active);
517 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
519 /* Arbitrary choice of hash table size */
520 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
521 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
522 if (rec->rec_lh_hash == NULL) {
527 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
528 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
533 CERROR("Failed to setup %s resource container\n",
534 lnet_res_type2str(type));
535 lnet_res_container_cleanup(rec);
540 lnet_res_containers_destroy(struct lnet_res_container **recs)
542 struct lnet_res_container *rec;
545 cfs_percpt_for_each(rec, i, recs)
546 lnet_res_container_cleanup(rec);
548 cfs_percpt_free(recs);
551 static struct lnet_res_container **
552 lnet_res_containers_create(int type)
554 struct lnet_res_container **recs;
555 struct lnet_res_container *rec;
559 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
561 CERROR("Failed to allocate %s resource containers\n",
562 lnet_res_type2str(type));
566 cfs_percpt_for_each(rec, i, recs) {
567 rc = lnet_res_container_setup(rec, i, type);
569 lnet_res_containers_destroy(recs);
577 struct lnet_libhandle *
578 lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
580 /* ALWAYS called with lnet_res_lock held */
581 struct list_head *head;
582 struct lnet_libhandle *lh;
585 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
588 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
589 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
591 list_for_each_entry(lh, head, lh_hash_chain) {
592 if (lh->lh_cookie == cookie)
600 lnet_res_lh_initialize(struct lnet_res_container *rec,
601 struct lnet_libhandle *lh)
603 /* ALWAYS called with lnet_res_lock held */
604 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
607 lh->lh_cookie = rec->rec_lh_cookie;
608 rec->rec_lh_cookie += 1 << ibits;
610 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
612 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
615 static int lnet_unprepare(void);
618 lnet_prepare(lnet_pid_t requested_pid)
620 /* Prepare to bring up the network */
621 struct lnet_res_container **recs;
624 if (requested_pid == LNET_PID_ANY) {
625 /* Don't instantiate LNET just for me */
629 LASSERT(the_lnet.ln_refcount == 0);
631 the_lnet.ln_routing = 0;
633 LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
634 the_lnet.ln_pid = requested_pid;
636 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
637 INIT_LIST_HEAD(&the_lnet.ln_peers);
638 INIT_LIST_HEAD(&the_lnet.ln_remote_peer_ni_list);
639 INIT_LIST_HEAD(&the_lnet.ln_nets);
640 INIT_LIST_HEAD(&the_lnet.ln_routers);
641 INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
642 INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
644 rc = lnet_descriptor_setup();
648 rc = lnet_create_remote_nets_table();
653 * NB the interface cookie in wire handles guards against delayed
654 * replies and ACKs appearing valid after reboot.
656 the_lnet.ln_interface_cookie = ktime_get_real_ns();
658 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
659 sizeof(struct lnet_counters));
660 if (the_lnet.ln_counters == NULL) {
661 CERROR("Failed to allocate counters for LNet\n");
666 rc = lnet_peer_tables_create();
670 rc = lnet_msg_containers_create();
674 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
675 LNET_COOKIE_TYPE_EQ);
679 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
685 the_lnet.ln_me_containers = recs;
687 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
693 the_lnet.ln_md_containers = recs;
695 rc = lnet_portals_create();
697 CERROR("Failed to create portals for LNet: %d\n", rc);
709 lnet_unprepare (void)
711 /* NB no LNET_LOCK since this is the last reference. All LND instances
712 * have shut down already, so it is safe to unlink and free all
713 * descriptors, even those that appear committed to a network op (eg MD
714 * with non-zero pending count) */
716 lnet_fail_nid(LNET_NID_ANY, 0);
718 LASSERT(the_lnet.ln_refcount == 0);
719 LASSERT(list_empty(&the_lnet.ln_test_peers));
720 LASSERT(list_empty(&the_lnet.ln_nets));
722 lnet_portals_destroy();
724 if (the_lnet.ln_md_containers != NULL) {
725 lnet_res_containers_destroy(the_lnet.ln_md_containers);
726 the_lnet.ln_md_containers = NULL;
729 if (the_lnet.ln_me_containers != NULL) {
730 lnet_res_containers_destroy(the_lnet.ln_me_containers);
731 the_lnet.ln_me_containers = NULL;
734 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
736 lnet_msg_containers_destroy();
738 lnet_rtrpools_free(0);
740 if (the_lnet.ln_counters != NULL) {
741 cfs_percpt_free(the_lnet.ln_counters);
742 the_lnet.ln_counters = NULL;
744 lnet_destroy_remote_nets_table();
745 lnet_descriptor_cleanup();
751 lnet_net2ni_locked(__u32 net_id, int cpt)
754 struct lnet_net *net;
756 LASSERT(cpt != LNET_LOCK_EX);
758 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
759 if (net->net_id == net_id) {
760 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
770 lnet_net2ni_addref(__u32 net)
775 ni = lnet_net2ni_locked(net, 0);
777 lnet_ni_addref_locked(ni, 0);
782 EXPORT_SYMBOL(lnet_net2ni_addref);
785 lnet_get_net_locked(__u32 net_id)
787 struct lnet_net *net;
789 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
790 if (net->net_id == net_id)
798 lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
803 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
808 val = hash_long(key, LNET_CPT_BITS);
809 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
813 return (unsigned int)(key + val + (val >> 1)) % number;
817 lnet_cpt_of_nid_locked(lnet_nid_t nid, struct lnet_ni *ni)
819 struct lnet_net *net;
821 /* must called with hold of lnet_net_lock */
822 if (LNET_CPT_NUMBER == 1)
823 return 0; /* the only one */
826 * If NI is provided then use the CPT identified in the NI cpt
827 * list if one exists. If one doesn't exist, then that NI is
828 * associated with all CPTs and it follows that the net it belongs
829 * to is implicitly associated with all CPTs, so just hash the nid
833 if (ni->ni_cpts != NULL)
834 return ni->ni_cpts[lnet_nid_cpt_hash(nid,
837 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
840 /* no NI provided so look at the net */
841 net = lnet_get_net_locked(LNET_NIDNET(nid));
843 if (net != NULL && net->net_cpts != NULL) {
844 return net->net_cpts[lnet_nid_cpt_hash(nid, net->net_ncpts)];
847 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
851 lnet_cpt_of_nid(lnet_nid_t nid, struct lnet_ni *ni)
856 if (LNET_CPT_NUMBER == 1)
857 return 0; /* the only one */
859 cpt = lnet_net_lock_current();
861 cpt2 = lnet_cpt_of_nid_locked(nid, ni);
863 lnet_net_unlock(cpt);
867 EXPORT_SYMBOL(lnet_cpt_of_nid);
870 lnet_islocalnet(__u32 net_id)
872 struct lnet_net *net;
876 cpt = lnet_net_lock_current();
878 net = lnet_get_net_locked(net_id);
882 lnet_net_unlock(cpt);
888 lnet_is_ni_healthy_locked(struct lnet_ni *ni)
890 if (ni->ni_state == LNET_NI_STATE_ACTIVE ||
891 ni->ni_state == LNET_NI_STATE_DEGRADED)
898 lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
900 struct lnet_net *net;
903 LASSERT(cpt != LNET_LOCK_EX);
905 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
906 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
907 if (ni->ni_nid == nid)
916 lnet_nid2ni_addref(lnet_nid_t nid)
921 ni = lnet_nid2ni_locked(nid, 0);
923 lnet_ni_addref_locked(ni, 0);
928 EXPORT_SYMBOL(lnet_nid2ni_addref);
931 lnet_islocalnid(lnet_nid_t nid)
936 cpt = lnet_net_lock_current();
937 ni = lnet_nid2ni_locked(nid, cpt);
938 lnet_net_unlock(cpt);
944 lnet_count_acceptor_nets(void)
946 /* Return the # of NIs that need the acceptor. */
948 struct lnet_net *net;
951 cpt = lnet_net_lock_current();
952 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
953 /* all socklnd type networks should have the acceptor
955 if (net->net_lnd->lnd_accept != NULL)
959 lnet_net_unlock(cpt);
964 static struct lnet_ping_info *
965 lnet_ping_info_create(int num_ni)
967 struct lnet_ping_info *ping_info;
970 infosz = offsetof(struct lnet_ping_info, pi_ni[num_ni]);
971 LIBCFS_ALLOC(ping_info, infosz);
972 if (ping_info == NULL) {
973 CERROR("Can't allocate ping info[%d]\n", num_ni);
977 ping_info->pi_nnis = num_ni;
978 ping_info->pi_pid = the_lnet.ln_pid;
979 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
980 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
986 lnet_get_net_ni_count_locked(struct lnet_net *net)
991 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
998 lnet_get_net_ni_count_pre(struct lnet_net *net)
1003 list_for_each_entry(ni, &net->net_ni_added, ni_netlist)
1010 lnet_get_ni_count(void)
1013 struct lnet_net *net;
1018 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1019 list_for_each_entry(ni, &net->net_ni_list, ni_netlist)
1029 lnet_ping_info_free(struct lnet_ping_info *pinfo)
1032 offsetof(struct lnet_ping_info,
1033 pi_ni[pinfo->pi_nnis]));
1037 lnet_ping_info_destroy(void)
1039 struct lnet_net *net;
1042 lnet_net_lock(LNET_LOCK_EX);
1044 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1045 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1047 ni->ni_status = NULL;
1052 lnet_ping_info_free(the_lnet.ln_ping_info);
1053 the_lnet.ln_ping_info = NULL;
1055 lnet_net_unlock(LNET_LOCK_EX);
1059 lnet_ping_event_handler(struct lnet_event *event)
1061 struct lnet_ping_info *pinfo = event->md.user_ptr;
1063 if (event->unlinked)
1064 pinfo->pi_features = LNET_PING_FEAT_INVAL;
1068 lnet_ping_info_setup(struct lnet_ping_info **ppinfo,
1069 struct lnet_handle_md *md_handle,
1070 int ni_count, bool set_eq)
1072 struct lnet_process_id id = {
1073 .nid = LNET_NID_ANY,
1076 struct lnet_handle_me me_handle;
1077 struct lnet_md md = { NULL };
1081 rc = LNetEQAlloc(0, lnet_ping_event_handler,
1082 &the_lnet.ln_ping_target_eq);
1084 CERROR("Can't allocate ping EQ: %d\n", rc);
1089 *ppinfo = lnet_ping_info_create(ni_count);
1090 if (*ppinfo == NULL) {
1095 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
1096 LNET_PROTO_PING_MATCHBITS, 0,
1097 LNET_UNLINK, LNET_INS_AFTER,
1100 CERROR("Can't create ping ME: %d\n", rc);
1104 /* initialize md content */
1106 md.length = offsetof(struct lnet_ping_info,
1107 pi_ni[(*ppinfo)->pi_nnis]);
1108 md.threshold = LNET_MD_THRESH_INF;
1110 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
1111 LNET_MD_MANAGE_REMOTE;
1113 md.eq_handle = the_lnet.ln_ping_target_eq;
1114 md.user_ptr = *ppinfo;
1116 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
1118 CERROR("Can't attach ping MD: %d\n", rc);
1125 rc2 = LNetMEUnlink(me_handle);
1128 lnet_ping_info_free(*ppinfo);
1132 LNetEQFree(the_lnet.ln_ping_target_eq);
1137 lnet_ping_md_unlink(struct lnet_ping_info *pinfo, struct lnet_handle_md *md_handle)
1139 sigset_t blocked = cfs_block_allsigs();
1141 LNetMDUnlink(*md_handle);
1142 LNetInvalidateMDHandle(md_handle);
1144 /* NB md could be busy; this just starts the unlink */
1145 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
1146 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
1147 set_current_state(TASK_UNINTERRUPTIBLE);
1148 schedule_timeout(cfs_time_seconds(1));
1151 cfs_restore_sigs(blocked);
1155 lnet_ping_info_install_locked(struct lnet_ping_info *ping_info)
1159 struct lnet_net *net;
1160 struct lnet_ni_status *ns;
1163 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
1164 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
1165 LASSERT(i < ping_info->pi_nnis);
1167 ns = &ping_info->pi_ni[i];
1169 ns->ns_nid = ni->ni_nid;
1172 ns->ns_status = (ni->ni_status != NULL) ?
1173 ni->ni_status->ns_status :
1185 lnet_ping_target_update(struct lnet_ping_info *pinfo,
1186 struct lnet_handle_md md_handle)
1188 struct lnet_ping_info *old_pinfo = NULL;
1189 struct lnet_handle_md old_md;
1191 /* switch the NIs to point to the new ping info created */
1192 lnet_net_lock(LNET_LOCK_EX);
1194 if (!the_lnet.ln_routing)
1195 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1196 lnet_ping_info_install_locked(pinfo);
1198 if (the_lnet.ln_ping_info != NULL) {
1199 old_pinfo = the_lnet.ln_ping_info;
1200 old_md = the_lnet.ln_ping_target_md;
1202 the_lnet.ln_ping_target_md = md_handle;
1203 the_lnet.ln_ping_info = pinfo;
1205 lnet_net_unlock(LNET_LOCK_EX);
1207 if (old_pinfo != NULL) {
1208 /* unlink the old ping info */
1209 lnet_ping_md_unlink(old_pinfo, &old_md);
1210 lnet_ping_info_free(old_pinfo);
1215 lnet_ping_target_fini(void)
1219 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1220 &the_lnet.ln_ping_target_md);
1222 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1225 lnet_ping_info_destroy();
1229 lnet_ni_tq_credits(struct lnet_ni *ni)
1233 LASSERT(ni->ni_ncpts >= 1);
1235 if (ni->ni_ncpts == 1)
1236 return ni->ni_net->net_tunables.lct_max_tx_credits;
1238 credits = ni->ni_net->net_tunables.lct_max_tx_credits / ni->ni_ncpts;
1239 credits = max(credits, 8 * ni->ni_net->net_tunables.lct_peer_tx_credits);
1240 credits = min(credits, ni->ni_net->net_tunables.lct_max_tx_credits);
1246 lnet_ni_unlink_locked(struct lnet_ni *ni)
1248 if (!list_empty(&ni->ni_cptlist)) {
1249 list_del_init(&ni->ni_cptlist);
1250 lnet_ni_decref_locked(ni, 0);
1253 /* move it to zombie list and nobody can find it anymore */
1254 LASSERT(!list_empty(&ni->ni_netlist));
1255 list_move(&ni->ni_netlist, &ni->ni_net->net_ni_zombie);
1256 lnet_ni_decref_locked(ni, 0);
1260 lnet_clear_zombies_nis_locked(struct lnet_net *net)
1265 struct list_head *zombie_list = &net->net_ni_zombie;
1268 * Now wait for the NIs I just nuked to show up on the zombie
1269 * list and shut them down in guaranteed thread context
1272 while (!list_empty(zombie_list)) {
1276 ni = list_entry(zombie_list->next,
1277 struct lnet_ni, ni_netlist);
1278 list_del_init(&ni->ni_netlist);
1279 /* the ni should be in deleting state. If it's not it's
1281 LASSERT(ni->ni_state == LNET_NI_STATE_DELETING);
1282 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1285 /* still busy, add it back to zombie list */
1286 list_add(&ni->ni_netlist, zombie_list);
1290 if (!list_empty(&ni->ni_netlist)) {
1291 lnet_net_unlock(LNET_LOCK_EX);
1293 if ((i & (-i)) == i) {
1295 "Waiting for zombie LNI %s\n",
1296 libcfs_nid2str(ni->ni_nid));
1298 set_current_state(TASK_UNINTERRUPTIBLE);
1299 schedule_timeout(cfs_time_seconds(1));
1300 lnet_net_lock(LNET_LOCK_EX);
1304 lnet_net_unlock(LNET_LOCK_EX);
1306 islo = ni->ni_net->net_lnd->lnd_type == LOLND;
1308 LASSERT(!in_interrupt());
1309 (net->net_lnd->lnd_shutdown)(ni);
1312 CDEBUG(D_LNI, "Removed LNI %s\n",
1313 libcfs_nid2str(ni->ni_nid));
1317 lnet_net_lock(LNET_LOCK_EX);
1321 /* shutdown down the NI and release refcount */
1323 lnet_shutdown_lndni(struct lnet_ni *ni)
1326 struct lnet_net *net = ni->ni_net;
1328 lnet_net_lock(LNET_LOCK_EX);
1329 ni->ni_state = LNET_NI_STATE_DELETING;
1330 lnet_ni_unlink_locked(ni);
1331 lnet_incr_dlc_seq();
1332 lnet_net_unlock(LNET_LOCK_EX);
1334 /* clear messages for this NI on the lazy portal */
1335 for (i = 0; i < the_lnet.ln_nportals; i++)
1336 lnet_clear_lazy_portal(ni, i, "Shutting down NI");
1338 lnet_net_lock(LNET_LOCK_EX);
1339 lnet_clear_zombies_nis_locked(net);
1340 lnet_net_unlock(LNET_LOCK_EX);
1344 lnet_shutdown_lndnet(struct lnet_net *net)
1348 lnet_net_lock(LNET_LOCK_EX);
1350 net->net_state = LNET_NET_STATE_DELETING;
1352 list_del_init(&net->net_list);
1354 while (!list_empty(&net->net_ni_list)) {
1355 ni = list_entry(net->net_ni_list.next,
1356 struct lnet_ni, ni_netlist);
1357 lnet_net_unlock(LNET_LOCK_EX);
1358 lnet_shutdown_lndni(ni);
1359 lnet_net_lock(LNET_LOCK_EX);
1362 lnet_net_unlock(LNET_LOCK_EX);
1364 /* Do peer table cleanup for this net */
1365 lnet_peer_tables_cleanup(net);
1367 lnet_net_lock(LNET_LOCK_EX);
1369 * decrement ref count on lnd only when the entire network goes
1372 net->net_lnd->lnd_refcount--;
1374 lnet_net_unlock(LNET_LOCK_EX);
1380 lnet_shutdown_lndnets(void)
1382 struct lnet_net *net;
1384 /* NB called holding the global mutex */
1386 /* All quiet on the API front */
1387 LASSERT(the_lnet.ln_state == LNET_STATE_RUNNING);
1388 LASSERT(the_lnet.ln_refcount == 0);
1390 lnet_net_lock(LNET_LOCK_EX);
1391 the_lnet.ln_state = LNET_STATE_STOPPING;
1393 while (!list_empty(&the_lnet.ln_nets)) {
1395 * move the nets to the zombie list to avoid them being
1396 * picked up for new work. LONET is also included in the
1397 * Nets that will be moved to the zombie list
1399 net = list_entry(the_lnet.ln_nets.next,
1400 struct lnet_net, net_list);
1401 list_move(&net->net_list, &the_lnet.ln_net_zombie);
1404 /* Drop the cached loopback Net. */
1405 if (the_lnet.ln_loni != NULL) {
1406 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1407 the_lnet.ln_loni = NULL;
1409 lnet_net_unlock(LNET_LOCK_EX);
1411 /* iterate through the net zombie list and delete each net */
1412 while (!list_empty(&the_lnet.ln_net_zombie)) {
1413 net = list_entry(the_lnet.ln_net_zombie.next,
1414 struct lnet_net, net_list);
1415 lnet_shutdown_lndnet(net);
1418 lnet_net_lock(LNET_LOCK_EX);
1419 the_lnet.ln_state = LNET_STATE_SHUTDOWN;
1420 lnet_net_unlock(LNET_LOCK_EX);
1424 lnet_startup_lndni(struct lnet_ni *ni, struct lnet_lnd_tunables *tun)
1427 struct lnet_tx_queue *tq;
1429 struct lnet_net *net = ni->ni_net;
1431 mutex_lock(&the_lnet.ln_lnd_mutex);
1434 memcpy(&ni->ni_lnd_tunables, tun, sizeof(*tun));
1435 ni->ni_lnd_tunables_set = true;
1438 rc = (net->net_lnd->lnd_startup)(ni);
1440 mutex_unlock(&the_lnet.ln_lnd_mutex);
1443 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
1444 rc, libcfs_lnd2str(net->net_lnd->lnd_type));
1445 lnet_net_lock(LNET_LOCK_EX);
1446 net->net_lnd->lnd_refcount--;
1447 lnet_net_unlock(LNET_LOCK_EX);
1451 ni->ni_state = LNET_NI_STATE_ACTIVE;
1453 /* We keep a reference on the loopback net through the loopback NI */
1454 if (net->net_lnd->lnd_type == LOLND) {
1456 LASSERT(the_lnet.ln_loni == NULL);
1457 the_lnet.ln_loni = ni;
1458 ni->ni_net->net_tunables.lct_peer_tx_credits = 0;
1459 ni->ni_net->net_tunables.lct_peer_rtr_credits = 0;
1460 ni->ni_net->net_tunables.lct_max_tx_credits = 0;
1461 ni->ni_net->net_tunables.lct_peer_timeout = 0;
1465 if (ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ||
1466 ni->ni_net->net_tunables.lct_max_tx_credits == 0) {
1467 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1468 libcfs_lnd2str(net->net_lnd->lnd_type),
1469 ni->ni_net->net_tunables.lct_peer_tx_credits == 0 ?
1471 /* shutdown the NI since if we get here then it must've already
1474 lnet_shutdown_lndni(ni);
1478 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1479 tq->tq_credits_min =
1480 tq->tq_credits_max =
1481 tq->tq_credits = lnet_ni_tq_credits(ni);
1484 atomic_set(&ni->ni_tx_credits,
1485 lnet_ni_tq_credits(ni) * ni->ni_ncpts);
1487 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1488 libcfs_nid2str(ni->ni_nid),
1489 ni->ni_net->net_tunables.lct_peer_tx_credits,
1490 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1491 ni->ni_net->net_tunables.lct_peer_rtr_credits,
1492 ni->ni_net->net_tunables.lct_peer_timeout);
1501 lnet_startup_lndnet(struct lnet_net *net, struct lnet_lnd_tunables *tun)
1504 struct lnet_net *net_l = NULL;
1505 struct list_head local_ni_list;
1509 struct lnet_lnd *lnd;
1511 net->net_tunables.lct_peer_timeout;
1513 net->net_tunables.lct_max_tx_credits;
1514 int peerrtrcredits =
1515 net->net_tunables.lct_peer_rtr_credits;
1517 INIT_LIST_HEAD(&local_ni_list);
1520 * make sure that this net is unique. If it isn't then
1521 * we are adding interfaces to an already existing network, and
1522 * 'net' is just a convenient way to pass in the list.
1523 * if it is unique we need to find the LND and load it if
1526 if (lnet_net_unique(net->net_id, &the_lnet.ln_nets, &net_l)) {
1527 lnd_type = LNET_NETTYP(net->net_id);
1529 LASSERT(libcfs_isknown_lnd(lnd_type));
1531 mutex_lock(&the_lnet.ln_lnd_mutex);
1532 lnd = lnet_find_lnd_by_type(lnd_type);
1535 mutex_unlock(&the_lnet.ln_lnd_mutex);
1536 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
1537 mutex_lock(&the_lnet.ln_lnd_mutex);
1539 lnd = lnet_find_lnd_by_type(lnd_type);
1541 mutex_unlock(&the_lnet.ln_lnd_mutex);
1542 CERROR("Can't load LND %s, module %s, rc=%d\n",
1543 libcfs_lnd2str(lnd_type),
1544 libcfs_lnd2modname(lnd_type), rc);
1545 #ifndef HAVE_MODULE_LOADING_SUPPORT
1546 LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
1547 "compiled with kernel module "
1548 "loading support.");
1555 lnet_net_lock(LNET_LOCK_EX);
1556 lnd->lnd_refcount++;
1557 lnet_net_unlock(LNET_LOCK_EX);
1561 mutex_unlock(&the_lnet.ln_lnd_mutex);
1567 * net_l: if the network being added is unique then net_l
1568 * will point to that network
1569 * if the network being added is not unique then
1570 * net_l points to the existing network.
1572 * When we enter the loop below, we'll pick NIs off he
1573 * network beign added and start them up, then add them to
1574 * a local ni list. Once we've successfully started all
1575 * the NIs then we join the local NI list (of started up
1576 * networks) with the net_l->net_ni_list, which should
1577 * point to the correct network to add the new ni list to
1579 * If any of the new NIs fail to start up, then we want to
1580 * iterate through the local ni list, which should include
1581 * any NIs which were successfully started up, and shut
1584 * After than we want to delete the network being added,
1585 * to avoid a memory leak.
1589 * When a network uses TCP bonding then all its interfaces
1590 * must be specified when the network is first defined: the
1591 * TCP bonding code doesn't allow for interfaces to be added
1594 if (net_l != net && net_l != NULL && use_tcp_bonding &&
1595 LNET_NETTYP(net_l->net_id) == SOCKLND) {
1600 while (!list_empty(&net->net_ni_added)) {
1601 ni = list_entry(net->net_ni_added.next, struct lnet_ni,
1603 list_del_init(&ni->ni_netlist);
1605 /* make sure that the the NI we're about to start
1606 * up is actually unique. if it's not fail. */
1607 if (!lnet_ni_unique_net(&net_l->net_ni_list,
1608 ni->ni_interfaces[0])) {
1613 /* adjust the pointer the parent network, just in case it
1614 * the net is a duplicate */
1617 rc = lnet_startup_lndni(ni, tun);
1619 LASSERT(ni->ni_net->net_tunables.lct_peer_timeout <= 0 ||
1620 ni->ni_net->net_lnd->lnd_query != NULL);
1626 list_add_tail(&ni->ni_netlist, &local_ni_list);
1631 lnet_net_lock(LNET_LOCK_EX);
1632 list_splice_tail(&local_ni_list, &net_l->net_ni_list);
1633 lnet_incr_dlc_seq();
1634 lnet_net_unlock(LNET_LOCK_EX);
1636 /* if the network is not unique then we don't want to keep
1637 * it around after we're done. Free it. Otherwise add that
1638 * net to the global the_lnet.ln_nets */
1639 if (net_l != net && net_l != NULL) {
1641 * TODO - note. currently the tunables can not be updated
1646 net->net_state = LNET_NET_STATE_ACTIVE;
1648 * restore tunables after it has been overwitten by the
1651 if (peer_timeout != -1)
1652 net->net_tunables.lct_peer_timeout = peer_timeout;
1653 if (maxtxcredits != -1)
1654 net->net_tunables.lct_max_tx_credits = maxtxcredits;
1655 if (peerrtrcredits != -1)
1656 net->net_tunables.lct_peer_rtr_credits = peerrtrcredits;
1658 lnet_net_lock(LNET_LOCK_EX);
1659 list_add_tail(&net->net_list, &the_lnet.ln_nets);
1660 lnet_net_unlock(LNET_LOCK_EX);
1667 * shutdown the new NIs that are being started up
1668 * free the NET being started
1670 while (!list_empty(&local_ni_list)) {
1671 ni = list_entry(local_ni_list.next, struct lnet_ni,
1674 lnet_shutdown_lndni(ni);
1684 lnet_startup_lndnets(struct list_head *netlist)
1686 struct lnet_net *net;
1691 * Change to running state before bringing up the LNDs. This
1692 * allows lnet_shutdown_lndnets() to assert that we've passed
1695 lnet_net_lock(LNET_LOCK_EX);
1696 the_lnet.ln_state = LNET_STATE_RUNNING;
1697 lnet_net_unlock(LNET_LOCK_EX);
1699 while (!list_empty(netlist)) {
1700 net = list_entry(netlist->next, struct lnet_net, net_list);
1701 list_del_init(&net->net_list);
1703 rc = lnet_startup_lndnet(net, NULL);
1713 lnet_shutdown_lndnets();
1719 * Initialize LNet library.
1721 * Automatically called at module loading time. Caller has to call
1722 * lnet_lib_exit() after a call to lnet_lib_init(), if and only if the
1723 * latter returned 0. It must be called exactly once.
1725 * \retval 0 on success
1726 * \retval -ve on failures.
1728 int lnet_lib_init(void)
1732 lnet_assert_wire_constants();
1734 memset(&the_lnet, 0, sizeof(the_lnet));
1736 /* refer to global cfs_cpt_table for now */
1737 the_lnet.ln_cpt_table = cfs_cpt_table;
1738 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1740 LASSERT(the_lnet.ln_cpt_number > 0);
1741 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1742 /* we are under risk of consuming all lh_cookie */
1743 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1744 "please change setting of CPT-table and retry\n",
1745 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1749 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1750 the_lnet.ln_cpt_bits++;
1752 rc = lnet_create_locks();
1754 CERROR("Can't create LNet global locks: %d\n", rc);
1758 the_lnet.ln_refcount = 0;
1759 LNetInvalidateEQHandle(&the_lnet.ln_rc_eqh);
1760 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1761 INIT_LIST_HEAD(&the_lnet.ln_net_zombie);
1762 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1763 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1765 /* The hash table size is the number of bits it takes to express the set
1766 * ln_num_routes, minus 1 (better to under estimate than over so we
1767 * don't waste memory). */
1768 if (rnet_htable_size <= 0)
1769 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1770 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1771 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1772 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1773 order_base_2(rnet_htable_size) - 1);
1775 /* All LNDs apart from the LOLND are in separate modules. They
1776 * register themselves when their module loads, and unregister
1777 * themselves when their module is unloaded. */
1778 lnet_register_lnd(&the_lolnd);
1783 * Finalize LNet library.
1785 * \pre lnet_lib_init() called with success.
1786 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1788 void lnet_lib_exit(void)
1790 LASSERT(the_lnet.ln_refcount == 0);
1792 while (!list_empty(&the_lnet.ln_lnds))
1793 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
1794 struct lnet_lnd, lnd_list));
1795 lnet_destroy_locks();
1799 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1801 * Users must call this function at least once before any other functions.
1802 * For each successful call there must be a corresponding call to
1803 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1806 * The PID used by LNet may be different from the one requested.
1809 * \param requested_pid PID requested by the caller.
1811 * \return >= 0 on success, and < 0 error code on failures.
1814 LNetNIInit(lnet_pid_t requested_pid)
1816 int im_a_router = 0;
1819 struct lnet_ping_info *pinfo;
1820 struct lnet_handle_md md_handle;
1821 struct list_head net_head;
1822 struct lnet_net *net;
1824 INIT_LIST_HEAD(&net_head);
1826 mutex_lock(&the_lnet.ln_api_mutex);
1828 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1830 if (the_lnet.ln_refcount > 0) {
1831 rc = the_lnet.ln_refcount++;
1832 mutex_unlock(&the_lnet.ln_api_mutex);
1836 rc = lnet_prepare(requested_pid);
1838 mutex_unlock(&the_lnet.ln_api_mutex);
1842 /* create a network for Loopback network */
1843 net = lnet_net_alloc(LNET_MKNET(LOLND, 0), &net_head);
1846 goto err_empty_list;
1849 /* Add in the loopback NI */
1850 if (lnet_ni_alloc(net, NULL, NULL) == NULL) {
1852 goto err_empty_list;
1855 /* If LNet is being initialized via DLC it is possible
1856 * that the user requests not to load module parameters (ones which
1857 * are supported by DLC) on initialization. Therefore, make sure not
1858 * to load networks, routes and forwarding from module parameters
1859 * in this case. On cleanup in case of failure only clean up
1860 * routes if it has been loaded */
1861 if (!the_lnet.ln_nis_from_mod_params) {
1862 rc = lnet_parse_networks(&net_head, lnet_get_networks(),
1865 goto err_empty_list;
1868 ni_count = lnet_startup_lndnets(&net_head);
1871 goto err_empty_list;
1874 if (!the_lnet.ln_nis_from_mod_params) {
1875 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1877 goto err_shutdown_lndnis;
1879 rc = lnet_check_routes();
1881 goto err_destroy_routes;
1883 rc = lnet_rtrpools_alloc(im_a_router);
1885 goto err_destroy_routes;
1888 rc = lnet_acceptor_start();
1890 goto err_destroy_routes;
1892 the_lnet.ln_refcount = 1;
1893 /* Now I may use my own API functions... */
1895 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
1897 goto err_acceptor_stop;
1899 lnet_ping_target_update(pinfo, md_handle);
1901 rc = lnet_router_checker_start();
1908 mutex_unlock(&the_lnet.ln_api_mutex);
1913 lnet_ping_target_fini();
1915 the_lnet.ln_refcount = 0;
1916 lnet_acceptor_stop();
1918 if (!the_lnet.ln_nis_from_mod_params)
1919 lnet_destroy_routes();
1920 err_shutdown_lndnis:
1921 lnet_shutdown_lndnets();
1925 mutex_unlock(&the_lnet.ln_api_mutex);
1926 while (!list_empty(&net_head)) {
1927 struct lnet_net *net;
1929 net = list_entry(net_head.next, struct lnet_net, net_list);
1930 list_del_init(&net->net_list);
1935 EXPORT_SYMBOL(LNetNIInit);
1938 * Stop LNet interfaces, routing, and forwarding.
1940 * Users must call this function once for each successful call to LNetNIInit().
1941 * Once the LNetNIFini() operation has been started, the results of pending
1942 * API operations are undefined.
1944 * \return always 0 for current implementation.
1949 mutex_lock(&the_lnet.ln_api_mutex);
1951 LASSERT(the_lnet.ln_refcount > 0);
1953 if (the_lnet.ln_refcount != 1) {
1954 the_lnet.ln_refcount--;
1956 LASSERT(!the_lnet.ln_niinit_self);
1961 lnet_router_checker_stop();
1962 lnet_ping_target_fini();
1964 /* Teardown fns that use my own API functions BEFORE here */
1965 the_lnet.ln_refcount = 0;
1967 lnet_acceptor_stop();
1968 lnet_destroy_routes();
1969 lnet_shutdown_lndnets();
1973 mutex_unlock(&the_lnet.ln_api_mutex);
1976 EXPORT_SYMBOL(LNetNIFini);
1979 * Grabs the ni data from the ni structure and fills the out
1982 * \param[in] ni network interface structure
1983 * \param[out] cfg_ni NI config information
1984 * \param[out] tun network and LND tunables
1987 lnet_fill_ni_info(struct lnet_ni *ni, struct lnet_ioctl_config_ni *cfg_ni,
1988 struct lnet_ioctl_config_lnd_tunables *tun,
1989 struct lnet_ioctl_element_stats *stats,
1992 size_t min_size = 0;
1995 if (!ni || !cfg_ni || !tun)
1998 if (ni->ni_interfaces[0] != NULL) {
1999 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2000 if (ni->ni_interfaces[i] != NULL) {
2001 strncpy(cfg_ni->lic_ni_intf[i],
2002 ni->ni_interfaces[i],
2003 sizeof(cfg_ni->lic_ni_intf[i]));
2008 cfg_ni->lic_nid = ni->ni_nid;
2009 cfg_ni->lic_status = ni->ni_status->ns_status;
2010 cfg_ni->lic_tcp_bonding = use_tcp_bonding;
2011 cfg_ni->lic_dev_cpt = ni->ni_dev_cpt;
2013 memcpy(&tun->lt_cmn, &ni->ni_net->net_tunables, sizeof(tun->lt_cmn));
2016 stats->iel_send_count = atomic_read(&ni->ni_stats.send_count);
2017 stats->iel_recv_count = atomic_read(&ni->ni_stats.recv_count);
2021 * tun->lt_tun will always be present, but in order to be
2022 * backwards compatible, we need to deal with the cases when
2023 * tun->lt_tun is smaller than what the kernel has, because it
2024 * comes from an older version of a userspace program, then we'll
2025 * need to copy as much information as we have available space.
2027 min_size = tun_size - sizeof(tun->lt_cmn);
2028 memcpy(&tun->lt_tun, &ni->ni_lnd_tunables, min_size);
2030 /* copy over the cpts */
2031 if (ni->ni_ncpts == LNET_CPT_NUMBER &&
2032 ni->ni_cpts == NULL) {
2033 for (i = 0; i < ni->ni_ncpts; i++)
2034 cfg_ni->lic_cpts[i] = i;
2037 ni->ni_cpts != NULL && i < ni->ni_ncpts &&
2038 i < LNET_MAX_SHOW_NUM_CPT;
2040 cfg_ni->lic_cpts[i] = ni->ni_cpts[i];
2042 cfg_ni->lic_ncpts = ni->ni_ncpts;
2046 * NOTE: This is a legacy function left in the code to be backwards
2047 * compatible with older userspace programs. It should eventually be
2050 * Grabs the ni data from the ni structure and fills the out
2053 * \param[in] ni network interface structure
2054 * \param[out] config config information
2057 lnet_fill_ni_info_legacy(struct lnet_ni *ni,
2058 struct lnet_ioctl_config_data *config)
2060 struct lnet_ioctl_net_config *net_config;
2061 struct lnet_ioctl_config_lnd_tunables *lnd_cfg = NULL;
2062 size_t min_size, tunable_size = 0;
2068 net_config = (struct lnet_ioctl_net_config *) config->cfg_bulk;
2072 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
2073 ARRAY_SIZE(net_config->ni_interfaces));
2075 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
2076 if (!ni->ni_interfaces[i])
2079 strncpy(net_config->ni_interfaces[i],
2080 ni->ni_interfaces[i],
2081 sizeof(net_config->ni_interfaces[i]));
2084 config->cfg_nid = ni->ni_nid;
2085 config->cfg_config_u.cfg_net.net_peer_timeout =
2086 ni->ni_net->net_tunables.lct_peer_timeout;
2087 config->cfg_config_u.cfg_net.net_max_tx_credits =
2088 ni->ni_net->net_tunables.lct_max_tx_credits;
2089 config->cfg_config_u.cfg_net.net_peer_tx_credits =
2090 ni->ni_net->net_tunables.lct_peer_tx_credits;
2091 config->cfg_config_u.cfg_net.net_peer_rtr_credits =
2092 ni->ni_net->net_tunables.lct_peer_rtr_credits;
2094 net_config->ni_status = ni->ni_status->ns_status;
2097 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
2099 for (i = 0; i < num_cpts; i++)
2100 net_config->ni_cpts[i] = ni->ni_cpts[i];
2102 config->cfg_ncpts = num_cpts;
2106 * See if user land tools sent in a newer and larger version
2107 * of struct lnet_tunables than what the kernel uses.
2109 min_size = sizeof(*config) + sizeof(*net_config);
2111 if (config->cfg_hdr.ioc_len > min_size)
2112 tunable_size = config->cfg_hdr.ioc_len - min_size;
2114 /* Don't copy too much data to user space */
2115 min_size = min(tunable_size, sizeof(ni->ni_lnd_tunables));
2116 lnd_cfg = (struct lnet_ioctl_config_lnd_tunables *)net_config->cfg_bulk;
2118 if (lnd_cfg && min_size) {
2119 memcpy(&lnd_cfg->lt_tun, &ni->ni_lnd_tunables, min_size);
2120 config->cfg_config_u.cfg_net.net_interface_count = 1;
2122 /* Tell user land that kernel side has less data */
2123 if (tunable_size > sizeof(ni->ni_lnd_tunables)) {
2124 min_size = tunable_size - sizeof(ni->ni_lnd_tunables);
2125 config->cfg_hdr.ioc_len -= min_size;
2131 lnet_get_ni_idx_locked(int idx)
2134 struct lnet_net *net;
2136 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
2137 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
2147 lnet_get_next_ni_locked(struct lnet_net *mynet, struct lnet_ni *prev)
2150 struct lnet_net *net = mynet;
2154 net = list_entry(the_lnet.ln_nets.next, struct lnet_net,
2156 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2162 if (prev->ni_netlist.next == &prev->ni_net->net_ni_list) {
2163 /* if you reached the end of the ni list and the net is
2164 * specified, then there are no more nis in that net */
2168 /* we reached the end of this net ni list. move to the
2170 if (prev->ni_net->net_list.next == &the_lnet.ln_nets)
2171 /* no more nets and no more NIs. */
2174 /* get the next net */
2175 net = list_entry(prev->ni_net->net_list.next, struct lnet_net,
2177 /* get the ni on it */
2178 ni = list_entry(net->net_ni_list.next, struct lnet_ni,
2184 /* there are more nis left */
2185 ni = list_entry(prev->ni_netlist.next, struct lnet_ni, ni_netlist);
2191 lnet_get_net_config(struct lnet_ioctl_config_data *config)
2196 int idx = config->cfg_count;
2198 cpt = lnet_net_lock_current();
2200 ni = lnet_get_ni_idx_locked(idx);
2205 lnet_fill_ni_info_legacy(ni, config);
2209 lnet_net_unlock(cpt);
2214 lnet_get_ni_config(struct lnet_ioctl_config_ni *cfg_ni,
2215 struct lnet_ioctl_config_lnd_tunables *tun,
2216 struct lnet_ioctl_element_stats *stats,
2223 if (!cfg_ni || !tun || !stats)
2226 cpt = lnet_net_lock_current();
2228 ni = lnet_get_ni_idx_locked(cfg_ni->lic_idx);
2233 lnet_fill_ni_info(ni, cfg_ni, tun, stats, tun_size);
2237 lnet_net_unlock(cpt);
2241 static int lnet_add_net_common(struct lnet_net *net,
2242 struct lnet_ioctl_config_lnd_tunables *tun)
2245 struct lnet_ping_info *pinfo;
2246 struct lnet_handle_md md_handle;
2248 struct lnet_remotenet *rnet;
2250 int num_acceptor_nets;
2252 lnet_net_lock(LNET_LOCK_EX);
2253 rnet = lnet_find_rnet_locked(net->net_id);
2254 lnet_net_unlock(LNET_LOCK_EX);
2256 * make sure that the net added doesn't invalidate the current
2257 * configuration LNet is keeping
2260 CERROR("Adding net %s will invalidate routing configuration\n",
2261 libcfs_net2str(net->net_id));
2267 * make sure you calculate the correct number of slots in the ping
2268 * info. Since the ping info is a flattened list of all the NIs,
2269 * we should allocate enough slots to accomodate the number of NIs
2270 * which will be added.
2272 * since ni hasn't been configured yet, use
2273 * lnet_get_net_ni_count_pre() which checks the net_ni_added list
2275 net_ni_count = lnet_get_net_ni_count_pre(net);
2277 rc = lnet_ping_info_setup(&pinfo, &md_handle,
2278 net_ni_count + lnet_get_ni_count(),
2286 memcpy(&net->net_tunables,
2287 &tun->lt_cmn, sizeof(net->net_tunables));
2289 memset(&net->net_tunables, -1, sizeof(net->net_tunables));
2292 * before starting this network get a count of the current TCP
2293 * networks which require the acceptor thread running. If that
2294 * count is == 0 before we start up this network, then we'd want to
2295 * start up the acceptor thread after starting up this network
2297 num_acceptor_nets = lnet_count_acceptor_nets();
2299 net_id = net->net_id;
2301 rc = lnet_startup_lndnet(net,
2302 (tun) ? &tun->lt_tun : NULL);
2306 lnet_net_lock(LNET_LOCK_EX);
2307 net = lnet_get_net_locked(net_id);
2308 lnet_net_unlock(LNET_LOCK_EX);
2313 * Start the acceptor thread if this is the first network
2314 * being added that requires the thread.
2316 if (net->net_lnd->lnd_accept && num_acceptor_nets == 0) {
2317 rc = lnet_acceptor_start();
2319 /* shutdown the net that we just started */
2320 CERROR("Failed to start up acceptor thread\n");
2321 lnet_shutdown_lndnet(net);
2326 lnet_net_lock(LNET_LOCK_EX);
2327 lnet_peer_net_added(net);
2328 lnet_net_unlock(LNET_LOCK_EX);
2330 lnet_ping_target_update(pinfo, md_handle);
2335 lnet_ping_md_unlink(pinfo, &md_handle);
2336 lnet_ping_info_free(pinfo);
2340 static int lnet_handle_legacy_ip2nets(char *ip2nets,
2341 struct lnet_ioctl_config_lnd_tunables *tun)
2343 struct lnet_net *net;
2346 struct list_head net_head;
2348 INIT_LIST_HEAD(&net_head);
2350 rc = lnet_parse_ip2nets(&nets, ip2nets);
2354 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
2358 mutex_lock(&the_lnet.ln_api_mutex);
2359 while (!list_empty(&net_head)) {
2360 net = list_entry(net_head.next, struct lnet_net, net_list);
2361 list_del_init(&net->net_list);
2362 rc = lnet_add_net_common(net, tun);
2368 mutex_unlock(&the_lnet.ln_api_mutex);
2370 while (!list_empty(&net_head)) {
2371 net = list_entry(net_head.next, struct lnet_net, net_list);
2372 list_del_init(&net->net_list);
2378 int lnet_dyn_add_ni(struct lnet_ioctl_config_ni *conf)
2380 struct lnet_net *net;
2382 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
2386 /* get the tunables if they are available */
2387 if (conf->lic_cfg_hdr.ioc_len >=
2388 sizeof(*conf) + sizeof(*tun))
2389 tun = (struct lnet_ioctl_config_lnd_tunables *)
2392 /* handle legacy ip2nets from DLC */
2393 if (conf->lic_legacy_ip2nets[0] != '\0')
2394 return lnet_handle_legacy_ip2nets(conf->lic_legacy_ip2nets,
2397 net_id = LNET_NIDNET(conf->lic_nid);
2399 net = lnet_net_alloc(net_id, NULL);
2403 for (i = 0; i < conf->lic_ncpts; i++) {
2404 if (conf->lic_cpts[i] >= LNET_CPT_NUMBER)
2408 ni = lnet_ni_alloc_w_cpt_array(net, conf->lic_cpts, conf->lic_ncpts,
2409 conf->lic_ni_intf[0]);
2413 mutex_lock(&the_lnet.ln_api_mutex);
2415 rc = lnet_add_net_common(net, tun);
2417 mutex_unlock(&the_lnet.ln_api_mutex);
2422 int lnet_dyn_del_ni(struct lnet_ioctl_config_ni *conf)
2424 struct lnet_net *net;
2426 __u32 net_id = LNET_NIDNET(conf->lic_nid);
2427 struct lnet_ping_info *pinfo;
2428 struct lnet_handle_md md_handle;
2433 /* don't allow userspace to shutdown the LOLND */
2434 if (LNET_NETTYP(net_id) == LOLND)
2437 mutex_lock(&the_lnet.ln_api_mutex);
2441 net = lnet_get_net_locked(net_id);
2443 CERROR("net %s not found\n",
2444 libcfs_net2str(net_id));
2449 addr = LNET_NIDADDR(conf->lic_nid);
2451 /* remove the entire net */
2452 net_count = lnet_get_net_ni_count_locked(net);
2456 /* create and link a new ping info, before removing the old one */
2457 rc = lnet_ping_info_setup(&pinfo, &md_handle,
2458 lnet_get_ni_count() - net_count,
2463 lnet_shutdown_lndnet(net);
2465 if (lnet_count_acceptor_nets() == 0)
2466 lnet_acceptor_stop();
2468 lnet_ping_target_update(pinfo, md_handle);
2473 ni = lnet_nid2ni_locked(conf->lic_nid, 0);
2475 CERROR("nid %s not found \n",
2476 libcfs_nid2str(conf->lic_nid));
2481 net_count = lnet_get_net_ni_count_locked(net);
2485 /* create and link a new ping info, before removing the old one */
2486 rc = lnet_ping_info_setup(&pinfo, &md_handle,
2487 lnet_get_ni_count() - 1, false);
2491 lnet_shutdown_lndni(ni);
2493 if (lnet_count_acceptor_nets() == 0)
2494 lnet_acceptor_stop();
2496 lnet_ping_target_update(pinfo, md_handle);
2498 /* check if the net is empty and remove it if it is */
2500 lnet_shutdown_lndnet(net);
2507 mutex_unlock(&the_lnet.ln_api_mutex);
2513 * lnet_dyn_add_net and lnet_dyn_del_net are now deprecated.
2514 * They are only expected to be called for unique networks.
2515 * That can be as a result of older DLC library
2516 * calls. Multi-Rail DLC and beyond no longer uses these APIs.
2519 lnet_dyn_add_net(struct lnet_ioctl_config_data *conf)
2521 struct lnet_net *net;
2522 struct list_head net_head;
2524 struct lnet_ioctl_config_lnd_tunables tun;
2525 char *nets = conf->cfg_config_u.cfg_net.net_intf;
2527 INIT_LIST_HEAD(&net_head);
2529 /* Create a net/ni structures for the network string */
2530 rc = lnet_parse_networks(&net_head, nets, use_tcp_bonding);
2532 return rc == 0 ? -EINVAL : rc;
2534 mutex_lock(&the_lnet.ln_api_mutex);
2537 rc = -EINVAL; /* only add one network per call */
2538 goto out_unlock_clean;
2541 net = list_entry(net_head.next, struct lnet_net, net_list);
2542 list_del_init(&net->net_list);
2544 LASSERT(lnet_net_unique(net->net_id, &the_lnet.ln_nets, NULL));
2546 memset(&tun, 0, sizeof(tun));
2548 tun.lt_cmn.lct_peer_timeout =
2549 conf->cfg_config_u.cfg_net.net_peer_timeout;
2550 tun.lt_cmn.lct_peer_tx_credits =
2551 conf->cfg_config_u.cfg_net.net_peer_tx_credits;
2552 tun.lt_cmn.lct_peer_rtr_credits =
2553 conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
2554 tun.lt_cmn.lct_max_tx_credits =
2555 conf->cfg_config_u.cfg_net.net_max_tx_credits;
2557 rc = lnet_add_net_common(net, &tun);
2560 mutex_unlock(&the_lnet.ln_api_mutex);
2561 while (!list_empty(&net_head)) {
2562 /* net_head list is empty in success case */
2563 net = list_entry(net_head.next, struct lnet_net, net_list);
2564 list_del_init(&net->net_list);
2571 lnet_dyn_del_net(__u32 net_id)
2573 struct lnet_net *net;
2574 struct lnet_ping_info *pinfo;
2575 struct lnet_handle_md md_handle;
2579 /* don't allow userspace to shutdown the LOLND */
2580 if (LNET_NETTYP(net_id) == LOLND)
2583 mutex_lock(&the_lnet.ln_api_mutex);
2587 net = lnet_get_net_locked(net_id);
2594 net_ni_count = lnet_get_net_ni_count_locked(net);
2598 /* create and link a new ping info, before removing the old one */
2599 rc = lnet_ping_info_setup(&pinfo, &md_handle,
2600 lnet_get_ni_count() - net_ni_count, false);
2604 lnet_shutdown_lndnet(net);
2606 if (lnet_count_acceptor_nets() == 0)
2607 lnet_acceptor_stop();
2609 lnet_ping_target_update(pinfo, md_handle);
2612 mutex_unlock(&the_lnet.ln_api_mutex);
2617 void lnet_incr_dlc_seq(void)
2619 atomic_inc(&lnet_dlc_seq_no);
2622 __u32 lnet_get_dlc_seq_locked(void)
2624 return atomic_read(&lnet_dlc_seq_no);
2628 * LNet ioctl handler.
2632 LNetCtl(unsigned int cmd, void *arg)
2634 struct libcfs_ioctl_data *data = arg;
2635 struct lnet_ioctl_config_data *config;
2636 struct lnet_process_id id = {0};
2640 BUILD_BUG_ON(sizeof(struct lnet_ioctl_net_config) +
2641 sizeof(struct lnet_ioctl_config_data) > LIBCFS_IOC_DATA_MAX);
2644 case IOC_LIBCFS_GET_NI:
2645 rc = LNetGetId(data->ioc_count, &id);
2646 data->ioc_nid = id.nid;
2649 case IOC_LIBCFS_FAIL_NID:
2650 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
2652 case IOC_LIBCFS_ADD_ROUTE:
2655 if (config->cfg_hdr.ioc_len < sizeof(*config))
2658 mutex_lock(&the_lnet.ln_api_mutex);
2659 rc = lnet_add_route(config->cfg_net,
2660 config->cfg_config_u.cfg_route.rtr_hop,
2662 config->cfg_config_u.cfg_route.
2665 rc = lnet_check_routes();
2667 lnet_del_route(config->cfg_net,
2670 mutex_unlock(&the_lnet.ln_api_mutex);
2673 case IOC_LIBCFS_DEL_ROUTE:
2676 if (config->cfg_hdr.ioc_len < sizeof(*config))
2679 mutex_lock(&the_lnet.ln_api_mutex);
2680 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
2681 mutex_unlock(&the_lnet.ln_api_mutex);
2684 case IOC_LIBCFS_GET_ROUTE:
2687 if (config->cfg_hdr.ioc_len < sizeof(*config))
2690 mutex_lock(&the_lnet.ln_api_mutex);
2691 rc = lnet_get_route(config->cfg_count,
2693 &config->cfg_config_u.cfg_route.rtr_hop,
2695 &config->cfg_config_u.cfg_route.rtr_flags,
2696 &config->cfg_config_u.cfg_route.
2698 mutex_unlock(&the_lnet.ln_api_mutex);
2701 case IOC_LIBCFS_GET_LOCAL_NI: {
2702 struct lnet_ioctl_config_ni *cfg_ni;
2703 struct lnet_ioctl_config_lnd_tunables *tun = NULL;
2704 struct lnet_ioctl_element_stats *stats;
2708 /* get the tunables if they are available */
2709 if (cfg_ni->lic_cfg_hdr.ioc_len <
2710 sizeof(*cfg_ni) + sizeof(*stats)+ sizeof(*tun))
2713 stats = (struct lnet_ioctl_element_stats *)
2715 tun = (struct lnet_ioctl_config_lnd_tunables *)
2716 (cfg_ni->lic_bulk + sizeof(*stats));
2718 tun_size = cfg_ni->lic_cfg_hdr.ioc_len - sizeof(*cfg_ni) -
2721 mutex_lock(&the_lnet.ln_api_mutex);
2722 rc = lnet_get_ni_config(cfg_ni, tun, stats, tun_size);
2723 mutex_unlock(&the_lnet.ln_api_mutex);
2727 case IOC_LIBCFS_GET_NET: {
2728 size_t total = sizeof(*config) +
2729 sizeof(struct lnet_ioctl_net_config);
2732 if (config->cfg_hdr.ioc_len < total)
2735 mutex_lock(&the_lnet.ln_api_mutex);
2736 rc = lnet_get_net_config(config);
2737 mutex_unlock(&the_lnet.ln_api_mutex);
2741 case IOC_LIBCFS_GET_LNET_STATS:
2743 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
2745 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
2748 mutex_lock(&the_lnet.ln_api_mutex);
2749 lnet_counters_get(&lnet_stats->st_cntrs);
2750 mutex_unlock(&the_lnet.ln_api_mutex);
2754 case IOC_LIBCFS_CONFIG_RTR:
2757 if (config->cfg_hdr.ioc_len < sizeof(*config))
2760 mutex_lock(&the_lnet.ln_api_mutex);
2761 if (config->cfg_config_u.cfg_buffers.buf_enable) {
2762 rc = lnet_rtrpools_enable();
2763 mutex_unlock(&the_lnet.ln_api_mutex);
2766 lnet_rtrpools_disable();
2767 mutex_unlock(&the_lnet.ln_api_mutex);
2770 case IOC_LIBCFS_ADD_BUF:
2773 if (config->cfg_hdr.ioc_len < sizeof(*config))
2776 mutex_lock(&the_lnet.ln_api_mutex);
2777 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
2779 config->cfg_config_u.cfg_buffers.
2781 config->cfg_config_u.cfg_buffers.
2783 mutex_unlock(&the_lnet.ln_api_mutex);
2786 case IOC_LIBCFS_SET_NUMA_RANGE: {
2787 struct lnet_ioctl_numa_range *numa;
2789 if (numa->nr_hdr.ioc_len != sizeof(*numa))
2791 mutex_lock(&the_lnet.ln_api_mutex);
2792 lnet_numa_range = numa->nr_range;
2793 mutex_unlock(&the_lnet.ln_api_mutex);
2797 case IOC_LIBCFS_GET_NUMA_RANGE: {
2798 struct lnet_ioctl_numa_range *numa;
2800 if (numa->nr_hdr.ioc_len != sizeof(*numa))
2802 numa->nr_range = lnet_numa_range;
2806 case IOC_LIBCFS_GET_BUF: {
2807 struct lnet_ioctl_pool_cfg *pool_cfg;
2808 size_t total = sizeof(*config) + sizeof(*pool_cfg);
2812 if (config->cfg_hdr.ioc_len < total)
2815 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
2817 mutex_lock(&the_lnet.ln_api_mutex);
2818 rc = lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
2819 mutex_unlock(&the_lnet.ln_api_mutex);
2823 case IOC_LIBCFS_ADD_PEER_NI: {
2824 struct lnet_ioctl_peer_cfg *cfg = arg;
2826 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
2829 mutex_lock(&the_lnet.ln_api_mutex);
2830 rc = lnet_add_peer_ni_to_peer(cfg->prcfg_prim_nid,
2833 mutex_unlock(&the_lnet.ln_api_mutex);
2837 case IOC_LIBCFS_DEL_PEER_NI: {
2838 struct lnet_ioctl_peer_cfg *cfg = arg;
2840 if (cfg->prcfg_hdr.ioc_len < sizeof(*cfg))
2843 mutex_lock(&the_lnet.ln_api_mutex);
2844 rc = lnet_del_peer_ni_from_peer(cfg->prcfg_prim_nid,
2845 cfg->prcfg_cfg_nid);
2846 mutex_unlock(&the_lnet.ln_api_mutex);
2850 case IOC_LIBCFS_GET_PEER_INFO: {
2851 struct lnet_ioctl_peer *peer_info = arg;
2853 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
2856 mutex_lock(&the_lnet.ln_api_mutex);
2857 rc = lnet_get_peer_ni_info(
2858 peer_info->pr_count,
2860 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
2861 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
2862 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
2863 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
2864 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
2865 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
2866 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_tx_credits,
2867 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2868 mutex_unlock(&the_lnet.ln_api_mutex);
2872 case IOC_LIBCFS_GET_PEER_NI: {
2873 struct lnet_ioctl_peer_cfg *cfg = arg;
2874 struct lnet_peer_ni_credit_info __user *lpni_cri;
2875 struct lnet_ioctl_element_stats __user *lpni_stats;
2876 size_t usr_size = sizeof(*lpni_cri) + sizeof(*lpni_stats);
2878 if ((cfg->prcfg_hdr.ioc_len != sizeof(*cfg)) ||
2879 (cfg->prcfg_size != usr_size))
2882 lpni_cri = cfg->prcfg_bulk;
2883 lpni_stats = cfg->prcfg_bulk + sizeof(*lpni_cri);
2885 mutex_lock(&the_lnet.ln_api_mutex);
2886 rc = lnet_get_peer_info(cfg->prcfg_count, &cfg->prcfg_prim_nid,
2887 &cfg->prcfg_cfg_nid, &cfg->prcfg_mr,
2888 lpni_cri, lpni_stats);
2889 mutex_unlock(&the_lnet.ln_api_mutex);
2893 case IOC_LIBCFS_NOTIFY_ROUTER: {
2894 unsigned long jiffies_passed;
2896 jiffies_passed = ktime_get_real_seconds() - data->ioc_u64[0];
2897 jiffies_passed = cfs_time_seconds(jiffies_passed);
2899 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
2900 jiffies - jiffies_passed);
2903 case IOC_LIBCFS_LNET_DIST:
2904 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2905 if (rc < 0 && rc != -EHOSTUNREACH)
2908 data->ioc_u32[0] = rc;
2911 case IOC_LIBCFS_TESTPROTOCOMPAT:
2912 lnet_net_lock(LNET_LOCK_EX);
2913 the_lnet.ln_testprotocompat = data->ioc_flags;
2914 lnet_net_unlock(LNET_LOCK_EX);
2917 case IOC_LIBCFS_LNET_FAULT:
2918 return lnet_fault_ctl(data->ioc_flags, data);
2920 case IOC_LIBCFS_PING: {
2921 signed long timeout;
2923 id.nid = data->ioc_nid;
2924 id.pid = data->ioc_u32[0];
2926 /* Don't block longer than 2 minutes */
2927 if (data->ioc_u32[1] > 120 * MSEC_PER_SEC)
2930 /* If timestamp is negative then disable timeout */
2931 if ((s32)data->ioc_u32[1] < 0)
2932 timeout = MAX_SCHEDULE_TIMEOUT;
2934 timeout = msecs_to_jiffies(data->ioc_u32[1]);
2936 rc = lnet_ping(id, timeout, data->ioc_pbuf1,
2937 data->ioc_plen1 / sizeof(struct lnet_process_id));
2940 data->ioc_count = rc;
2945 ni = lnet_net2ni_addref(data->ioc_net);
2949 if (ni->ni_net->net_lnd->lnd_ctl == NULL)
2952 rc = ni->ni_net->net_lnd->lnd_ctl(ni, cmd, arg);
2959 EXPORT_SYMBOL(LNetCtl);
2961 void LNetDebugPeer(struct lnet_process_id id)
2963 lnet_debug_peer(id.nid);
2965 EXPORT_SYMBOL(LNetDebugPeer);
2968 * Determine if the specified peer \a nid is on the local node.
2970 * \param nid peer nid to check
2972 * \retval true If peer NID is on the local node.
2973 * \retval false If peer NID is not on the local node.
2975 bool LNetIsPeerLocal(lnet_nid_t nid)
2977 struct lnet_net *net;
2981 cpt = lnet_net_lock_current();
2982 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
2983 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
2984 if (ni->ni_nid == nid) {
2985 lnet_net_unlock(cpt);
2990 lnet_net_unlock(cpt);
2994 EXPORT_SYMBOL(LNetIsPeerLocal);
2997 * Retrieve the struct lnet_process_id ID of LNet interface at \a index.
2998 * Note that all interfaces share a same PID, as requested by LNetNIInit().
3000 * \param index Index of the interface to look up.
3001 * \param id On successful return, this location will hold the
3002 * struct lnet_process_id ID of the interface.
3004 * \retval 0 If an interface exists at \a index.
3005 * \retval -ENOENT If no interface has been found.
3008 LNetGetId(unsigned int index, struct lnet_process_id *id)
3011 struct lnet_net *net;
3015 LASSERT(the_lnet.ln_refcount > 0);
3017 cpt = lnet_net_lock_current();
3019 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
3020 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
3024 id->nid = ni->ni_nid;
3025 id->pid = the_lnet.ln_pid;
3031 lnet_net_unlock(cpt);
3034 EXPORT_SYMBOL(LNetGetId);
3036 static int lnet_ping(struct lnet_process_id id, signed long timeout,
3037 struct lnet_process_id __user *ids, int n_ids)
3039 struct lnet_handle_eq eqh;
3040 struct lnet_handle_md mdh;
3041 struct lnet_event event;
3042 struct lnet_md md = { NULL };
3046 const signed long a_long_time = msecs_to_jiffies(60 * MSEC_PER_SEC);
3048 struct lnet_ping_info *info;
3049 struct lnet_process_id tmpid;
3056 infosz = offsetof(struct lnet_ping_info, pi_ni[n_ids]);
3058 /* n_ids limit is arbitrary */
3059 if (n_ids <= 0 || n_ids > lnet_interfaces_max || id.nid == LNET_NID_ANY)
3062 if (id.pid == LNET_PID_ANY)
3063 id.pid = LNET_PID_LUSTRE;
3065 LIBCFS_ALLOC(info, infosz);
3069 /* NB 2 events max (including any unlink event) */
3070 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
3072 CERROR("Can't allocate EQ: %d\n", rc);
3076 /* initialize md content */
3079 md.threshold = 2; /*GET/REPLY*/
3081 md.options = LNET_MD_TRUNCATE;
3085 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
3087 CERROR("Can't bind MD: %d\n", rc);
3091 rc = LNetGet(LNET_NID_ANY, mdh, id,
3092 LNET_RESERVED_PORTAL,
3093 LNET_PROTO_PING_MATCHBITS, 0);
3096 /* Don't CERROR; this could be deliberate! */
3098 rc2 = LNetMDUnlink(mdh);
3101 /* NB must wait for the UNLINK event below... */
3103 timeout = a_long_time;
3107 /* MUST block for unlink to complete */
3109 blocked = cfs_block_allsigs();
3111 rc2 = LNetEQPoll(&eqh, 1, timeout, &event, &which);
3114 cfs_restore_sigs(blocked);
3116 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
3117 (rc2 <= 0) ? -1 : event.type,
3118 (rc2 <= 0) ? -1 : event.status,
3119 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
3121 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
3123 if (rc2 <= 0 || event.status != 0) {
3124 /* timeout or error */
3125 if (!replied && rc == 0)
3126 rc = (rc2 < 0) ? rc2 :
3127 (rc2 == 0) ? -ETIMEDOUT :
3131 /* Ensure completion in finite time... */
3133 /* No assertion (racing with network) */
3135 timeout = a_long_time;
3136 } else if (rc2 == 0) {
3137 /* timed out waiting for unlink */
3138 CWARN("ping %s: late network completion\n",
3141 } else if (event.type == LNET_EVENT_REPLY) {
3146 } while (rc2 <= 0 || !event.unlinked);
3150 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
3157 LASSERT(nob >= 0 && nob <= infosz);
3159 rc = -EPROTO; /* if I can't parse... */
3162 /* can't check magic/version */
3163 CERROR("%s: ping info too short %d\n",
3164 libcfs_id2str(id), nob);
3168 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
3169 lnet_swap_pinginfo(info);
3170 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
3171 CERROR("%s: Unexpected magic %08x\n",
3172 libcfs_id2str(id), info->pi_magic);
3176 if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
3177 CERROR("%s: ping w/o NI status: 0x%x\n",
3178 libcfs_id2str(id), info->pi_features);
3182 if (nob < offsetof(struct lnet_ping_info, pi_ni[0])) {
3183 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
3184 nob, (int)offsetof(struct lnet_ping_info, pi_ni[0]));
3188 if (info->pi_nnis < n_ids)
3189 n_ids = info->pi_nnis;
3191 if (nob < offsetof(struct lnet_ping_info, pi_ni[n_ids])) {
3192 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
3193 nob, (int)offsetof(struct lnet_ping_info, pi_ni[n_ids]));
3197 rc = -EFAULT; /* If I SEGV... */
3199 memset(&tmpid, 0, sizeof(tmpid));
3200 for (i = 0; i < n_ids; i++) {
3201 tmpid.pid = info->pi_pid;
3202 tmpid.nid = info->pi_ni[i].ns_nid;
3203 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
3209 rc2 = LNetEQFree(eqh);
3211 CERROR("rc2 %d\n", rc2);
3215 LIBCFS_FREE(info, infosz);