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staging: lustre: improve LNet clean up code and API
[deliverable/linux.git] / drivers / staging / lustre / lnet / lnet / api-ni.c
CommitLineData
d7e09d03
PT		 1/*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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.
9 *
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).
15 *
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.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26/*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
1dc563a6 30 * Copyright (c) 2011, 2015, Intel Corporation.
d7e09d03
PT		 31 */
32/*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37#define DEBUG_SUBSYSTEM S_LNET
d7e09d03 38#include <linux/log2.h>
9056be30 39#include <linux/ktime.h>
d7e09d03 40
db18b8e9 41#include "../../include/linux/lnet/lib-lnet.h"
2e9a51bd 42#include "../../include/linux/lnet/lib-dlc.h"
db18b8e9 43
d7e09d03
PT		 44#define D_LNI D_CONSOLE
45
7e7ab095 46lnet_t the_lnet; /* THE state of the network */
d7e09d03
PT		 47EXPORT_SYMBOL(the_lnet);
48
d7e09d03 49static char *ip2nets = "";
8cc7b4b9
PT		 50module_param(ip2nets, charp, 0444);
51MODULE_PARM_DESC(ip2nets, "LNET network <- IP table");
d7e09d03
PT		 52
53static char *networks = "";
8cc7b4b9
PT		 54module_param(networks, charp, 0444);
55MODULE_PARM_DESC(networks, "local networks");
d7e09d03
PT		 56
57static char *routes = "";
8cc7b4b9
PT		 58module_param(routes, charp, 0444);
59MODULE_PARM_DESC(routes, "routes to non-local networks");
d7e09d03
PT		 60
61static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
8cc7b4b9
PT		 62module_param(rnet_htable_size, int, 0444);
63MODULE_PARM_DESC(rnet_htable_size, "size of remote network hash table");
d7e09d03 64
fccfde7d 65static int lnet_ping(lnet_process_id_t id, int timeout_ms,
4eb53dfd 66 lnet_process_id_t __user *ids, int n_ids);
fccfde7d 67
51bd8814 68static char *
d7e09d03
PT		 69lnet_get_routes(void)
70{
71 return routes;
72}
73
51bd8814 74static char *
d7e09d03
PT		 75lnet_get_networks(void)
76{
7e7ab095
MS		 77 char *nets;
78 int rc;
d7e09d03 79
5fd88337 80 if (*networks && *ip2nets) {
8ad5360a 81 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or 'ip2nets' but not both at once\n");
d7e09d03
PT		 82 return NULL;
83 }
84
5fd88337 85 if (*ip2nets) {
d7e09d03 86 rc = lnet_parse_ip2nets(&nets, ip2nets);
5fd88337 87 return !rc ? nets : NULL;
d7e09d03
PT		 88 }
89
5fd88337 90 if (*networks)
d7e09d03
PT		 91 return networks;
92
93 return "tcp";
94}
95
51bd8814 96static void
d7e09d03
PT		 97lnet_init_locks(void)
98{
99 spin_lock_init(&the_lnet.ln_eq_wait_lock);
100 init_waitqueue_head(&the_lnet.ln_eq_waitq);
101 mutex_init(&the_lnet.ln_lnd_mutex);
102 mutex_init(&the_lnet.ln_api_mutex);
103}
104
d7e09d03
PT		 105static int
106lnet_create_remote_nets_table(void)
107{
7e7ab095
MS		 108 int i;
109 struct list_head *hash;
d7e09d03 110
06ace26e 111 LASSERT(!the_lnet.ln_remote_nets_hash);
d7e09d03
PT		 112 LASSERT(the_lnet.ln_remote_nets_hbits > 0);
113 LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
06ace26e 114 if (!hash) {
d7e09d03
PT		 115 CERROR("Failed to create remote nets hash table\n");
116 return -ENOMEM;
117 }
118
119 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
120 INIT_LIST_HEAD(&hash[i]);
121 the_lnet.ln_remote_nets_hash = hash;
122 return 0;
123}
124
125static void
126lnet_destroy_remote_nets_table(void)
127{
1ae2bdb2 128 int i;
d7e09d03 129
06ace26e 130 if (!the_lnet.ln_remote_nets_hash)
d7e09d03
PT		 131 return;
132
133 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
134 LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
135
136 LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
1ae2bdb2
DE		 137 LNET_REMOTE_NETS_HASH_SIZE *
138 sizeof(the_lnet.ln_remote_nets_hash[0]));
d7e09d03
PT		 139 the_lnet.ln_remote_nets_hash = NULL;
140}
141
142static void
143lnet_destroy_locks(void)
144{
06ace26e 145 if (the_lnet.ln_res_lock) {
d7e09d03
PT		 146 cfs_percpt_lock_free(the_lnet.ln_res_lock);
147 the_lnet.ln_res_lock = NULL;
148 }
149
06ace26e 150 if (the_lnet.ln_net_lock) {
d7e09d03
PT		 151 cfs_percpt_lock_free(the_lnet.ln_net_lock);
152 the_lnet.ln_net_lock = NULL;
153 }
d7e09d03
PT		 154}
155
156static int
157lnet_create_locks(void)
158{
159 lnet_init_locks();
160
161 the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
06ace26e 162 if (!the_lnet.ln_res_lock)
d7e09d03
PT		 163 goto failed;
164
165 the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
06ace26e 166 if (!the_lnet.ln_net_lock)
d7e09d03
PT		 167 goto failed;
168
169 return 0;
170
171 failed:
172 lnet_destroy_locks();
173 return -ENOMEM;
174}
175
3b7566d9 176static void lnet_assert_wire_constants(void)
d7e09d03 177{
4420cfd3
JS		 178 /*
179 * Wire protocol assertions generated by 'wirecheck'
d7e09d03
PT		 180 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
181 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
4420cfd3
JS		 182 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)
183 */
d7e09d03
PT		 184
185 /* Constants... */
3b7566d9
TP		 186 CLASSERT(LNET_PROTO_TCP_MAGIC == 0xeebc0ded);
187 CLASSERT(LNET_PROTO_TCP_VERSION_MAJOR == 1);
188 CLASSERT(LNET_PROTO_TCP_VERSION_MINOR == 0);
189 CLASSERT(LNET_MSG_ACK == 0);
190 CLASSERT(LNET_MSG_PUT == 1);
191 CLASSERT(LNET_MSG_GET == 2);
192 CLASSERT(LNET_MSG_REPLY == 3);
193 CLASSERT(LNET_MSG_HELLO == 4);
d7e09d03
PT		 194
195 /* Checks for struct ptl_handle_wire_t */
3b7566d9
TP		 196 CLASSERT((int)sizeof(lnet_handle_wire_t) == 16);
197 CLASSERT((int)offsetof(lnet_handle_wire_t, wh_interface_cookie) == 0);
198 CLASSERT((int)sizeof(((lnet_handle_wire_t *)0)->wh_interface_cookie) == 8);
199 CLASSERT((int)offsetof(lnet_handle_wire_t, wh_object_cookie) == 8);
200 CLASSERT((int)sizeof(((lnet_handle_wire_t *)0)->wh_object_cookie) == 8);
d7e09d03
PT		 201
202 /* Checks for struct lnet_magicversion_t */
3b7566d9
TP		 203 CLASSERT((int)sizeof(lnet_magicversion_t) == 8);
204 CLASSERT((int)offsetof(lnet_magicversion_t, magic) == 0);
205 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->magic) == 4);
206 CLASSERT((int)offsetof(lnet_magicversion_t, version_major) == 4);
207 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->version_major) == 2);
208 CLASSERT((int)offsetof(lnet_magicversion_t, version_minor) == 6);
209 CLASSERT((int)sizeof(((lnet_magicversion_t *)0)->version_minor) == 2);
d7e09d03
PT		 210
211 /* Checks for struct lnet_hdr_t */
3b7566d9
TP		 212 CLASSERT((int)sizeof(lnet_hdr_t) == 72);
213 CLASSERT((int)offsetof(lnet_hdr_t, dest_nid) == 0);
214 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->dest_nid) == 8);
215 CLASSERT((int)offsetof(lnet_hdr_t, src_nid) == 8);
216 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->src_nid) == 8);
217 CLASSERT((int)offsetof(lnet_hdr_t, dest_pid) == 16);
218 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->dest_pid) == 4);
219 CLASSERT((int)offsetof(lnet_hdr_t, src_pid) == 20);
220 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->src_pid) == 4);
221 CLASSERT((int)offsetof(lnet_hdr_t, type) == 24);
222 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->type) == 4);
223 CLASSERT((int)offsetof(lnet_hdr_t, payload_length) == 28);
224 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->payload_length) == 4);
225 CLASSERT((int)offsetof(lnet_hdr_t, msg) == 32);
226 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg) == 40);
d7e09d03
PT		 227
228 /* Ack */
3b7566d9
TP		 229 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.dst_wmd) == 32);
230 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.dst_wmd) == 16);
231 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.match_bits) == 48);
232 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.match_bits) == 8);
233 CLASSERT((int)offsetof(lnet_hdr_t, msg.ack.mlength) == 56);
234 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.ack.mlength) == 4);
d7e09d03
PT		 235
236 /* Put */
3b7566d9
TP		 237 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.ack_wmd) == 32);
238 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.ack_wmd) == 16);
239 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.match_bits) == 48);
240 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.match_bits) == 8);
241 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.hdr_data) == 56);
242 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.hdr_data) == 8);
243 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.ptl_index) == 64);
244 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.ptl_index) == 4);
245 CLASSERT((int)offsetof(lnet_hdr_t, msg.put.offset) == 68);
246 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.put.offset) == 4);
d7e09d03
PT		 247
248 /* Get */
3b7566d9
TP		 249 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.return_wmd) == 32);
250 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.return_wmd) == 16);
251 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.match_bits) == 48);
252 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.match_bits) == 8);
253 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.ptl_index) == 56);
254 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.ptl_index) == 4);
255 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.src_offset) == 60);
256 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.src_offset) == 4);
257 CLASSERT((int)offsetof(lnet_hdr_t, msg.get.sink_length) == 64);
258 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.get.sink_length) == 4);
d7e09d03
PT		 259
260 /* Reply */
3b7566d9
TP		 261 CLASSERT((int)offsetof(lnet_hdr_t, msg.reply.dst_wmd) == 32);
262 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.reply.dst_wmd) == 16);
d7e09d03
PT		 263
264 /* Hello */
3b7566d9
TP		 265 CLASSERT((int)offsetof(lnet_hdr_t, msg.hello.incarnation) == 32);
266 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.hello.incarnation) == 8);
267 CLASSERT((int)offsetof(lnet_hdr_t, msg.hello.type) == 40);
268 CLASSERT((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
d7e09d03
PT		 269}
270
51bd8814 271static lnd_t *
80feb1ef 272lnet_find_lnd_by_type(__u32 type)
d7e09d03 273{
7e7ab095
MS		 274 lnd_t *lnd;
275 struct list_head *tmp;
d7e09d03
PT		 276
277 /* holding lnd mutex */
565f3d2f 278 list_for_each(tmp, &the_lnet.ln_lnds) {
d7e09d03
PT		 279 lnd = list_entry(tmp, lnd_t, lnd_list);
280
80feb1ef 281 if (lnd->lnd_type == type)
d7e09d03
PT		 282 return lnd;
283 }
284
285 return NULL;
286}
287
288void
3b7566d9 289lnet_register_lnd(lnd_t *lnd)
d7e09d03 290{
bdd84a6f 291 mutex_lock(&the_lnet.ln_lnd_mutex);
d7e09d03 292
3b7566d9
TP		 293 LASSERT(the_lnet.ln_init);
294 LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
06ace26e 295 LASSERT(!lnet_find_lnd_by_type(lnd->lnd_type));
d7e09d03 296
3b7566d9 297 list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
d7e09d03
PT		 298 lnd->lnd_refcount = 0;
299
300 CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
301
bdd84a6f 302 mutex_unlock(&the_lnet.ln_lnd_mutex);
d7e09d03
PT		 303}
304EXPORT_SYMBOL(lnet_register_lnd);
305
306void
3b7566d9 307lnet_unregister_lnd(lnd_t *lnd)
d7e09d03 308{
bdd84a6f 309 mutex_lock(&the_lnet.ln_lnd_mutex);
d7e09d03 310
3b7566d9
TP		 311 LASSERT(the_lnet.ln_init);
312 LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
5fd88337 313 LASSERT(!lnd->lnd_refcount);
d7e09d03 314
3b7566d9 315 list_del(&lnd->lnd_list);
d7e09d03
PT		 316 CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
317
bdd84a6f 318 mutex_unlock(&the_lnet.ln_lnd_mutex);
d7e09d03
PT		 319}
320EXPORT_SYMBOL(lnet_unregister_lnd);
321
322void
323lnet_counters_get(lnet_counters_t *counters)
324{
325 lnet_counters_t *ctr;
7e7ab095 326 int i;
d7e09d03
PT		 327
328 memset(counters, 0, sizeof(*counters));
329
330 lnet_net_lock(LNET_LOCK_EX);
331
332 cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
333 counters->msgs_max += ctr->msgs_max;
334 counters->msgs_alloc += ctr->msgs_alloc;
335 counters->errors += ctr->errors;
336 counters->send_count += ctr->send_count;
337 counters->recv_count += ctr->recv_count;
338 counters->route_count += ctr->route_count;
b3d0dfe5 339 counters->drop_count += ctr->drop_count;
d7e09d03
PT		 340 counters->send_length += ctr->send_length;
341 counters->recv_length += ctr->recv_length;
342 counters->route_length += ctr->route_length;
343 counters->drop_length += ctr->drop_length;
d7e09d03
PT		 344 }
345 lnet_net_unlock(LNET_LOCK_EX);
346}
347EXPORT_SYMBOL(lnet_counters_get);
348
349void
350lnet_counters_reset(void)
351{
352 lnet_counters_t *counters;
7e7ab095 353 int i;
d7e09d03
PT		 354
355 lnet_net_lock(LNET_LOCK_EX);
356
357 cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
358 memset(counters, 0, sizeof(lnet_counters_t));
359
360 lnet_net_unlock(LNET_LOCK_EX);
361}
d7e09d03 362
d7e09d03
PT		 363static char *
364lnet_res_type2str(int type)
365{
366 switch (type) {
367 default:
368 LBUG();
369 case LNET_COOKIE_TYPE_MD:
370 return "MD";
371 case LNET_COOKIE_TYPE_ME:
372 return "ME";
373 case LNET_COOKIE_TYPE_EQ:
374 return "EQ";
375 }
376}
377
51bd8814 378static void
d7e09d03
PT		 379lnet_res_container_cleanup(struct lnet_res_container *rec)
380{
7e7ab095 381 int count = 0;
d7e09d03 382
5fd88337 383 if (!rec->rec_type) /* not set yet, it's uninitialized */
d7e09d03
PT		 384 return;
385
386 while (!list_empty(&rec->rec_active)) {
387 struct list_head *e = rec->rec_active.next;
388
389 list_del_init(e);
390 if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
391 lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
392
393 } else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
394 lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
395
396 } else { /* NB: Active MEs should be attached on portals */
397 LBUG();
398 }
399 count++;
400 }
401
402 if (count > 0) {
4420cfd3
JS		 403 /*
404 * Found alive MD/ME/EQ, user really should unlink/free
d7e09d03 405 * all of them before finalize LNet, but if someone didn't,
4420cfd3
JS		 406 * we have to recycle garbage for him
407 */
d7e09d03
PT		 408 CERROR("%d active elements on exit of %s container\n",
409 count, lnet_res_type2str(rec->rec_type));
410 }
411
06ace26e 412 if (rec->rec_lh_hash) {
d7e09d03
PT		 413 LIBCFS_FREE(rec->rec_lh_hash,
414 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
415 rec->rec_lh_hash = NULL;
416 }
417
418 rec->rec_type = 0; /* mark it as finalized */
419}
420
51bd8814 421static int
39445367 422lnet_res_container_setup(struct lnet_res_container *rec, int cpt, int type)
d7e09d03 423{
7e7ab095
MS		 424 int rc = 0;
425 int i;
d7e09d03 426
5fd88337 427 LASSERT(!rec->rec_type);
d7e09d03
PT		 428
429 rec->rec_type = type;
430 INIT_LIST_HEAD(&rec->rec_active);
d7e09d03
PT		 431 rec->rec_lh_cookie = (cpt << LNET_COOKIE_TYPE_BITS) | type;
432
433 /* Arbitrary choice of hash table size */
434 LIBCFS_CPT_ALLOC(rec->rec_lh_hash, lnet_cpt_table(), cpt,
435 LNET_LH_HASH_SIZE * sizeof(rec->rec_lh_hash[0]));
06ace26e 436 if (!rec->rec_lh_hash) {
d7e09d03
PT		 437 rc = -ENOMEM;
438 goto out;
439 }
440
441 for (i = 0; i < LNET_LH_HASH_SIZE; i++)
442 INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
443
444 return 0;
445
446out:
447 CERROR("Failed to setup %s resource container\n",
448 lnet_res_type2str(type));
449 lnet_res_container_cleanup(rec);
450 return rc;
451}
452
453static void
454lnet_res_containers_destroy(struct lnet_res_container **recs)
455{
7e7ab095
MS		 456 struct lnet_res_container *rec;
457 int i;
d7e09d03
PT		 458
459 cfs_percpt_for_each(rec, i, recs)
460 lnet_res_container_cleanup(rec);
461
462 cfs_percpt_free(recs);
463}
464
465static struct lnet_res_container **
39445367 466lnet_res_containers_create(int type)
d7e09d03 467{
7e7ab095
MS		 468 struct lnet_res_container **recs;
469 struct lnet_res_container *rec;
470 int rc;
471 int i;
d7e09d03
PT		 472
473 recs = cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec));
06ace26e 474 if (!recs) {
d7e09d03
PT		 475 CERROR("Failed to allocate %s resource containers\n",
476 lnet_res_type2str(type));
477 return NULL;
478 }
479
480 cfs_percpt_for_each(rec, i, recs) {
39445367 481 rc = lnet_res_container_setup(rec, i, type);
5fd88337 482 if (rc) {
d7e09d03
PT		 483 lnet_res_containers_destroy(recs);
484 return NULL;
485 }
486 }
487
488 return recs;
489}
490
491lnet_libhandle_t *
492lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
493{
494 /* ALWAYS called with lnet_res_lock held */
7e7ab095
MS		 495 struct list_head *head;
496 lnet_libhandle_t *lh;
497 unsigned int hash;
d7e09d03
PT		 498
499 if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
500 return NULL;
501
502 hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
503 head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
504
505 list_for_each_entry(lh, head, lh_hash_chain) {
506 if (lh->lh_cookie == cookie)
507 return lh;
508 }
509
510 return NULL;
511}
512
513void
514lnet_res_lh_initialize(struct lnet_res_container *rec, lnet_libhandle_t *lh)
515{
516 /* ALWAYS called with lnet_res_lock held */
7e7ab095
MS		 517 unsigned int ibits = LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS;
518 unsigned int hash;
d7e09d03
PT		 519
520 lh->lh_cookie = rec->rec_lh_cookie;
521 rec->rec_lh_cookie += 1 << ibits;
522
523 hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
524
525 list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
526}
527
09f2f175 528static int lnet_unprepare(void);
d7e09d03 529
51bd8814 530static int
d7e09d03
PT		 531lnet_prepare(lnet_pid_t requested_pid)
532{
533 /* Prepare to bring up the network */
534 struct lnet_res_container **recs;
7e7ab095 535 int rc = 0;
d7e09d03 536
6c9e5a55
AS		 537 if (requested_pid == LNET_PID_ANY) {
538 /* Don't instantiate LNET just for me */
539 return -ENETDOWN;
540 }
541
5fd88337 542 LASSERT(!the_lnet.ln_refcount);
d7e09d03
PT		 543
544 the_lnet.ln_routing = 0;
545
5fd88337 546 LASSERT(!(requested_pid & LNET_PID_USERFLAG));
d7e09d03
PT		 547 the_lnet.ln_pid = requested_pid;
548
549 INIT_LIST_HEAD(&the_lnet.ln_test_peers);
550 INIT_LIST_HEAD(&the_lnet.ln_nis);
551 INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
552 INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
553 INIT_LIST_HEAD(&the_lnet.ln_routers);
554
555 rc = lnet_create_remote_nets_table();
5fd88337 556 if (rc)
d7e09d03 557 goto failed;
7bcd831b
SB		 558 /*
559 * NB the interface cookie in wire handles guards against delayed
560 * replies and ACKs appearing valid after reboot.
561 */
562 the_lnet.ln_interface_cookie = ktime_get_ns();
d7e09d03
PT		 563
564 the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
565 sizeof(lnet_counters_t));
06ace26e 566 if (!the_lnet.ln_counters) {
d7e09d03
PT		 567 CERROR("Failed to allocate counters for LNet\n");
568 rc = -ENOMEM;
569 goto failed;
570 }
571
572 rc = lnet_peer_tables_create();
5fd88337 573 if (rc)
d7e09d03
PT		 574 goto failed;
575
576 rc = lnet_msg_containers_create();
5fd88337 577 if (rc)
d7e09d03
PT		 578 goto failed;
579
580 rc = lnet_res_container_setup(&the_lnet.ln_eq_container, 0,
39445367 581 LNET_COOKIE_TYPE_EQ);
5fd88337 582 if (rc)
d7e09d03
PT		 583 goto failed;
584
39445367 585 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME);
06ace26e 586 if (!recs) {
a18ac314 587 rc = -ENOMEM;
d7e09d03 588 goto failed;
a18ac314 589 }
d7e09d03
PT		 590
591 the_lnet.ln_me_containers = recs;
592
39445367 593 recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD);
06ace26e 594 if (!recs) {
a18ac314 595 rc = -ENOMEM;
d7e09d03 596 goto failed;
a18ac314 597 }
d7e09d03
PT		 598
599 the_lnet.ln_md_containers = recs;
600
601 rc = lnet_portals_create();
5fd88337 602 if (rc) {
d7e09d03
PT		 603 CERROR("Failed to create portals for LNet: %d\n", rc);
604 goto failed;
605 }
606
607 return 0;
608
609 failed:
610 lnet_unprepare();
611 return rc;
612}
613
09f2f175 614static int
3b7566d9 615lnet_unprepare(void)
d7e09d03 616{
4420cfd3
JS		 617 /*
618 * NB no LNET_LOCK since this is the last reference. All LND instances
d7e09d03
PT		 619 * have shut down already, so it is safe to unlink and free all
620 * descriptors, even those that appear committed to a network op (eg MD
4420cfd3
JS		 621 * with non-zero pending count)
622 */
d7e09d03
PT		 623 lnet_fail_nid(LNET_NID_ANY, 0);
624
5fd88337 625 LASSERT(!the_lnet.ln_refcount);
d7e09d03
PT		 626 LASSERT(list_empty(&the_lnet.ln_test_peers));
627 LASSERT(list_empty(&the_lnet.ln_nis));
628 LASSERT(list_empty(&the_lnet.ln_nis_cpt));
629 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
630
631 lnet_portals_destroy();
632
06ace26e 633 if (the_lnet.ln_md_containers) {
d7e09d03
PT		 634 lnet_res_containers_destroy(the_lnet.ln_md_containers);
635 the_lnet.ln_md_containers = NULL;
636 }
637
06ace26e 638 if (the_lnet.ln_me_containers) {
d7e09d03
PT		 639 lnet_res_containers_destroy(the_lnet.ln_me_containers);
640 the_lnet.ln_me_containers = NULL;
641 }
642
643 lnet_res_container_cleanup(&the_lnet.ln_eq_container);
644
645 lnet_msg_containers_destroy();
646 lnet_peer_tables_destroy();
86ef6250 647 lnet_rtrpools_free(0);
d7e09d03 648
06ace26e 649 if (the_lnet.ln_counters) {
d7e09d03
PT		 650 cfs_percpt_free(the_lnet.ln_counters);
651 the_lnet.ln_counters = NULL;
652 }
653 lnet_destroy_remote_nets_table();
654
655 return 0;
656}
657
658lnet_ni_t *
659lnet_net2ni_locked(__u32 net, int cpt)
660{
7e7ab095
MS		 661 struct list_head *tmp;
662 lnet_ni_t *ni;
d7e09d03
PT		 663
664 LASSERT(cpt != LNET_LOCK_EX);
665
666 list_for_each(tmp, &the_lnet.ln_nis) {
667 ni = list_entry(tmp, lnet_ni_t, ni_list);
668
669 if (LNET_NIDNET(ni->ni_nid) == net) {
670 lnet_ni_addref_locked(ni, cpt);
671 return ni;
672 }
673 }
674
675 return NULL;
676}
677
678lnet_ni_t *
679lnet_net2ni(__u32 net)
680{
681 lnet_ni_t *ni;
682
683 lnet_net_lock(0);
684 ni = lnet_net2ni_locked(net, 0);
685 lnet_net_unlock(0);
686
687 return ni;
688}
689EXPORT_SYMBOL(lnet_net2ni);
690
691static unsigned int
692lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
693{
7e7ab095
MS		 694 __u64 key = nid;
695 unsigned int val;
d7e09d03
PT		 696
697 LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
698
699 if (number == 1)
700 return 0;
701
72c0824a 702 val = hash_long(key, LNET_CPT_BITS);
d7e09d03
PT		 703 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
704 if (val < number)
705 return val;
706
707 return (unsigned int)(key + val + (val >> 1)) % number;
708}
709
710int
711lnet_cpt_of_nid_locked(lnet_nid_t nid)
712{
713 struct lnet_ni *ni;
714
715 /* must called with hold of lnet_net_lock */
716 if (LNET_CPT_NUMBER == 1)
717 return 0; /* the only one */
718
719 /* take lnet_net_lock(any) would be OK */
720 if (!list_empty(&the_lnet.ln_nis_cpt)) {
721 list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
722 if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
723 continue;
724
06ace26e 725 LASSERT(ni->ni_cpts);
d7e09d03
PT		 726 return ni->ni_cpts[lnet_nid_cpt_hash
727 (nid, ni->ni_ncpts)];
728 }
729 }
730
731 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
732}
733
734int
735lnet_cpt_of_nid(lnet_nid_t nid)
736{
7e7ab095
MS		 737 int cpt;
738 int cpt2;
d7e09d03
PT		 739
740 if (LNET_CPT_NUMBER == 1)
741 return 0; /* the only one */
742
743 if (list_empty(&the_lnet.ln_nis_cpt))
744 return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
745
746 cpt = lnet_net_lock_current();
747 cpt2 = lnet_cpt_of_nid_locked(nid);
748 lnet_net_unlock(cpt);
749
750 return cpt2;
751}
752EXPORT_SYMBOL(lnet_cpt_of_nid);
753
754int
755lnet_islocalnet(__u32 net)
756{
7e7ab095
MS		 757 struct lnet_ni *ni;
758 int cpt;
d7e09d03
PT		 759
760 cpt = lnet_net_lock_current();
761
762 ni = lnet_net2ni_locked(net, cpt);
06ace26e 763 if (ni)
d7e09d03
PT		 764 lnet_ni_decref_locked(ni, cpt);
765
766 lnet_net_unlock(cpt);
767
06ace26e 768 return !!ni;
d7e09d03
PT		 769}
770
771lnet_ni_t *
772lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
773{
7e7ab095
MS		 774 struct lnet_ni *ni;
775 struct list_head *tmp;
d7e09d03
PT		 776
777 LASSERT(cpt != LNET_LOCK_EX);
778
779 list_for_each(tmp, &the_lnet.ln_nis) {
780 ni = list_entry(tmp, lnet_ni_t, ni_list);
781
782 if (ni->ni_nid == nid) {
783 lnet_ni_addref_locked(ni, cpt);
784 return ni;
785 }
786 }
787
788 return NULL;
789}
790
791int
792lnet_islocalnid(lnet_nid_t nid)
793{
7e7ab095
MS		 794 struct lnet_ni *ni;
795 int cpt;
d7e09d03
PT		 796
797 cpt = lnet_net_lock_current();
798 ni = lnet_nid2ni_locked(nid, cpt);
06ace26e 799 if (ni)
d7e09d03
PT		 800 lnet_ni_decref_locked(ni, cpt);
801 lnet_net_unlock(cpt);
802
06ace26e 803 return !!ni;
d7e09d03
PT		 804}
805
806int
3b7566d9 807lnet_count_acceptor_nis(void)
d7e09d03
PT		 808{
809 /* Return the # of NIs that need the acceptor. */
7e7ab095
MS		 810 int count = 0;
811 struct list_head *tmp;
812 struct lnet_ni *ni;
813 int cpt;
d7e09d03
PT		 814
815 cpt = lnet_net_lock_current();
816 list_for_each(tmp, &the_lnet.ln_nis) {
817 ni = list_entry(tmp, lnet_ni_t, ni_list);
818
06ace26e 819 if (ni->ni_lnd->lnd_accept)
d7e09d03
PT		 820 count++;
821 }
822
823 lnet_net_unlock(cpt);
824
825 return count;
826}
827
6c9e5a55
AS		 828static lnet_ping_info_t *
829lnet_ping_info_create(int num_ni)
830{
831 lnet_ping_info_t *ping_info;
832 unsigned int infosz;
833
834 infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
835 LIBCFS_ALLOC(ping_info, infosz);
836 if (!ping_info) {
837 CERROR("Can't allocate ping info[%d]\n", num_ni);
838 return NULL;
839 }
840
841 ping_info->pi_nnis = num_ni;
842 ping_info->pi_pid = the_lnet.ln_pid;
843 ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
844 ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
845
846 return ping_info;
847}
848
849static inline int
850lnet_get_ni_count(void)
851{
852 struct lnet_ni *ni;
853 int count = 0;
854
855 lnet_net_lock(0);
856
857 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
858 count++;
859
860 lnet_net_unlock(0);
861
862 return count;
863}
864
865static inline void
866lnet_ping_info_free(lnet_ping_info_t *pinfo)
867{
868 LIBCFS_FREE(pinfo,
869 offsetof(lnet_ping_info_t,
870 pi_ni[pinfo->pi_nnis]));
871}
872
873static void
874lnet_ping_info_destroy(void)
875{
876 struct lnet_ni *ni;
877
878 lnet_net_lock(LNET_LOCK_EX);
879
880 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
881 lnet_ni_lock(ni);
882 ni->ni_status = NULL;
883 lnet_ni_unlock(ni);
884 }
885
886 lnet_ping_info_free(the_lnet.ln_ping_info);
887 the_lnet.ln_ping_info = NULL;
888
889 lnet_net_unlock(LNET_LOCK_EX);
890}
891
892static void
893lnet_ping_event_handler(lnet_event_t *event)
894{
895 lnet_ping_info_t *pinfo = event->md.user_ptr;
896
897 if (event->unlinked)
898 pinfo->pi_features = LNET_PING_FEAT_INVAL;
899}
900
901static int
902lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
903 int ni_count, bool set_eq)
904{
905 lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
906 lnet_handle_me_t me_handle;
907 lnet_md_t md = {0};
908 int rc, rc2;
909
910 if (set_eq) {
911 rc = LNetEQAlloc(0, lnet_ping_event_handler,
912 &the_lnet.ln_ping_target_eq);
913 if (rc) {
914 CERROR("Can't allocate ping EQ: %d\n", rc);
915 return rc;
916 }
917 }
918
919 *ppinfo = lnet_ping_info_create(ni_count);
920 if (!*ppinfo) {
921 rc = -ENOMEM;
922 goto failed_0;
923 }
924
925 rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
926 LNET_PROTO_PING_MATCHBITS, 0,
927 LNET_UNLINK, LNET_INS_AFTER,
928 &me_handle);
929 if (rc) {
930 CERROR("Can't create ping ME: %d\n", rc);
931 goto failed_1;
932 }
933
934 /* initialize md content */
935 md.start = *ppinfo;
936 md.length = offsetof(lnet_ping_info_t,
937 pi_ni[(*ppinfo)->pi_nnis]);
938 md.threshold = LNET_MD_THRESH_INF;
939 md.max_size = 0;
940 md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
941 LNET_MD_MANAGE_REMOTE;
942 md.user_ptr = NULL;
943 md.eq_handle = the_lnet.ln_ping_target_eq;
944 md.user_ptr = *ppinfo;
945
946 rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
947 if (rc) {
948 CERROR("Can't attach ping MD: %d\n", rc);
949 goto failed_2;
950 }
951
952 return 0;
953
954failed_2:
955 rc2 = LNetMEUnlink(me_handle);
956 LASSERT(!rc2);
957failed_1:
958 lnet_ping_info_free(*ppinfo);
959 *ppinfo = NULL;
960failed_0:
961 if (set_eq)
962 LNetEQFree(the_lnet.ln_ping_target_eq);
963 return rc;
964}
965
966static void
967lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
968{
969 sigset_t blocked = cfs_block_allsigs();
970
971 LNetMDUnlink(*md_handle);
972 LNetInvalidateHandle(md_handle);
973
974 /* NB md could be busy; this just starts the unlink */
975 while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
976 CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
977 set_current_state(TASK_UNINTERRUPTIBLE);
978 schedule_timeout(cfs_time_seconds(1));
979 }
980
981 cfs_restore_sigs(blocked);
982}
983
984static void
985lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
986{
987 lnet_ni_status_t *ns;
988 lnet_ni_t *ni;
989 int i = 0;
990
991 list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
992 LASSERT(i < ping_info->pi_nnis);
993
994 ns = &ping_info->pi_ni[i];
995
996 ns->ns_nid = ni->ni_nid;
997
998 lnet_ni_lock(ni);
999 ns->ns_status = (ni->ni_status) ?
1000 ni->ni_status->ns_status : LNET_NI_STATUS_UP;
1001 ni->ni_status = ns;
1002 lnet_ni_unlock(ni);
1003
1004 i++;
1005 }
1006}
1007
1008static void
1009lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
1010{
1011 lnet_ping_info_t *old_pinfo = NULL;
1012 lnet_handle_md_t old_md;
1013
1014 /* switch the NIs to point to the new ping info created */
1015 lnet_net_lock(LNET_LOCK_EX);
1016
1017 if (!the_lnet.ln_routing)
1018 pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
1019 lnet_ping_info_install_locked(pinfo);
1020
1021 if (the_lnet.ln_ping_info) {
1022 old_pinfo = the_lnet.ln_ping_info;
1023 old_md = the_lnet.ln_ping_target_md;
1024 }
1025 the_lnet.ln_ping_target_md = md_handle;
1026 the_lnet.ln_ping_info = pinfo;
1027
1028 lnet_net_unlock(LNET_LOCK_EX);
1029
1030 if (old_pinfo) {
1031 /* unlink the old ping info */
1032 lnet_ping_md_unlink(old_pinfo, &old_md);
1033 lnet_ping_info_free(old_pinfo);
1034 }
1035}
1036
1037static void
1038lnet_ping_target_fini(void)
1039{
1040 int rc;
1041
1042 lnet_ping_md_unlink(the_lnet.ln_ping_info,
1043 &the_lnet.ln_ping_target_md);
1044
1045 rc = LNetEQFree(the_lnet.ln_ping_target_eq);
1046 LASSERT(!rc);
1047
1048 lnet_ping_info_destroy();
1049}
1050
d7e09d03
PT		 1051static int
1052lnet_ni_tq_credits(lnet_ni_t *ni)
1053{
7e7ab095 1054 int credits;
d7e09d03
PT		 1055
1056 LASSERT(ni->ni_ncpts >= 1);
1057
1058 if (ni->ni_ncpts == 1)
1059 return ni->ni_maxtxcredits;
1060
1061 credits = ni->ni_maxtxcredits / ni->ni_ncpts;
1062 credits = max(credits, 8 * ni->ni_peertxcredits);
1063 credits = min(credits, ni->ni_maxtxcredits);
1064
1065 return credits;
1066}
1067
9c26b89d
AS		 1068static void
1069lnet_ni_unlink_locked(lnet_ni_t *ni)
1070{
1071 if (!list_empty(&ni->ni_cptlist)) {
1072 list_del_init(&ni->ni_cptlist);
1073 lnet_ni_decref_locked(ni, 0);
1074 }
1075
1076 /* move it to zombie list and nobody can find it anymore */
1077 LASSERT(!list_empty(&ni->ni_list));
1078 list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
1079 lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
1080}
1081
51bd8814 1082static void
6c9e5a55 1083lnet_clear_zombies_nis_locked(void)
d7e09d03 1084{
7e7ab095
MS		 1085 int i;
1086 int islo;
1087 lnet_ni_t *ni;
d7e09d03 1088
6c9e5a55
AS		 1089 /*
1090 * Now wait for the NI's I just nuked to show up on ln_zombie_nis
1091 * and shut them down in guaranteed thread context
1092 */
1093 i = 2;
1094 while (!list_empty(&the_lnet.ln_nis_zombie)) {
1095 int *ref;
1096 int j;
1097
1098 ni = list_entry(the_lnet.ln_nis_zombie.next,
1099 lnet_ni_t, ni_list);
1100 list_del_init(&ni->ni_list);
1101 cfs_percpt_for_each(ref, j, ni->ni_refs) {
1102 if (!*ref)
1103 continue;
1104 /* still busy, add it back to zombie list */
1105 list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
1106 break;
1107 }
1108
1109 if (!list_empty(&ni->ni_list)) {
1110 lnet_net_unlock(LNET_LOCK_EX);
1111 ++i;
1112 if ((i & (-i)) == i) {
1113 CDEBUG(D_WARNING, "Waiting for zombie LNI %s\n",
1114 libcfs_nid2str(ni->ni_nid));
1115 }
1116 set_current_state(TASK_UNINTERRUPTIBLE);
1117 schedule_timeout(cfs_time_seconds(1));
1118 lnet_net_lock(LNET_LOCK_EX);
1119 continue;
1120 }
1121
1122 ni->ni_lnd->lnd_refcount--;
1123 lnet_net_unlock(LNET_LOCK_EX);
1124
1125 islo = ni->ni_lnd->lnd_type == LOLND;
1126
1127 LASSERT(!in_interrupt());
1128 ni->ni_lnd->lnd_shutdown(ni);
1129
1130 /*
1131 * can't deref lnd anymore now; it might have unregistered
1132 * itself...
1133 */
1134 if (!islo)
1135 CDEBUG(D_LNI, "Removed LNI %s\n",
1136 libcfs_nid2str(ni->ni_nid));
1137
1138 lnet_ni_free(ni);
1139 i = 2;
1140
1141 lnet_net_lock(LNET_LOCK_EX);
1142 }
1143}
1144
1145static void
1146lnet_shutdown_lndnis(void)
1147{
1148 lnet_ni_t *ni;
1149 int i;
1150
d7e09d03
PT		 1151 /* NB called holding the global mutex */
1152
1153 /* All quiet on the API front */
1154 LASSERT(!the_lnet.ln_shutdown);
5fd88337 1155 LASSERT(!the_lnet.ln_refcount);
d7e09d03
PT		 1156 LASSERT(list_empty(&the_lnet.ln_nis_zombie));
1157
1158 lnet_net_lock(LNET_LOCK_EX);
1159 the_lnet.ln_shutdown = 1; /* flag shutdown */
1160
1161 /* Unlink NIs from the global table */
1162 while (!list_empty(&the_lnet.ln_nis)) {
1163 ni = list_entry(the_lnet.ln_nis.next,
c314c319 1164 lnet_ni_t, ni_list);
9c26b89d 1165 lnet_ni_unlink_locked(ni);
d7e09d03
PT		 1166 }
1167
1168 /* Drop the cached eqwait NI. */
06ace26e 1169 if (the_lnet.ln_eq_waitni) {
d7e09d03
PT		 1170 lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
1171 the_lnet.ln_eq_waitni = NULL;
1172 }
1173
1174 /* Drop the cached loopback NI. */
06ace26e 1175 if (the_lnet.ln_loni) {
d7e09d03
PT		 1176 lnet_ni_decref_locked(the_lnet.ln_loni, 0);
1177 the_lnet.ln_loni = NULL;
1178 }
1179
1180 lnet_net_unlock(LNET_LOCK_EX);
1181
4420cfd3
JS		 1182 /*
1183 * Clear lazy portals and drop delayed messages which hold refs
1184 * on their lnet_msg_t::msg_rxpeer
1185 */
d7e09d03
PT		 1186 for (i = 0; i < the_lnet.ln_nportals; i++)
1187 LNetClearLazyPortal(i);
1188
4420cfd3
JS		 1189 /*
1190 * Clear the peer table and wait for all peers to go (they hold refs on
1191 * their NIs)
1192 */
21602c7d 1193 lnet_peer_tables_cleanup(NULL);
d7e09d03
PT		 1194
1195 lnet_net_lock(LNET_LOCK_EX);
d7e09d03 1196
6c9e5a55
AS		 1197 lnet_clear_zombies_nis_locked();
1198 the_lnet.ln_shutdown = 0;
1199 lnet_net_unlock(LNET_LOCK_EX);
1200}
d7e09d03 1201
9c26b89d
AS		 1202/* shutdown down the NI and release refcount */
1203static void
1204lnet_shutdown_lndni(struct lnet_ni *ni)
6c9e5a55 1205{
6c9e5a55 1206 lnet_net_lock(LNET_LOCK_EX);
9c26b89d 1207 lnet_ni_unlink_locked(ni);
d7e09d03 1208 lnet_net_unlock(LNET_LOCK_EX);
6c9e5a55
AS		 1209
1210 /* Do peer table cleanup for this ni */
9c26b89d 1211 lnet_peer_tables_cleanup(ni);
6c9e5a55
AS		 1212
1213 lnet_net_lock(LNET_LOCK_EX);
1214 lnet_clear_zombies_nis_locked();
1215 lnet_net_unlock(LNET_LOCK_EX);
d7e09d03
PT		 1216}
1217
51bd8814 1218static int
9c26b89d
AS		 1219lnet_startup_lndni(struct lnet_ni *ni, __s32 peer_timeout,
1220 __s32 peer_cr, __s32 peer_buf_cr, __s32 credits)
d7e09d03 1221{
9c26b89d
AS		 1222 int rc = 0;
1223 int lnd_type;
7e7ab095 1224 lnd_t *lnd;
7e7ab095 1225 struct lnet_tx_queue *tq;
7e7ab095 1226 int i;
d7e09d03 1227
9c26b89d 1228 lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
d7e09d03 1229
9c26b89d 1230 LASSERT(libcfs_isknown_lnd(lnd_type));
d7e09d03 1231
9c26b89d
AS		 1232 if (lnd_type == CIBLND || lnd_type == OPENIBLND ||
1233 lnd_type == IIBLND || lnd_type == VIBLND) {
1234 CERROR("LND %s obsoleted\n", libcfs_lnd2str(lnd_type));
1235 goto failed0;
1236 }
6c9e5a55 1237
9c26b89d
AS		 1238 /* Make sure this new NI is unique. */
1239 lnet_net_lock(LNET_LOCK_EX);
1240 if (!lnet_net_unique(LNET_NIDNET(ni->ni_nid), &the_lnet.ln_nis)) {
1241 if (lnd_type == LOLND) {
6c9e5a55 1242 lnet_net_unlock(LNET_LOCK_EX);
9c26b89d
AS		 1243 lnet_ni_free(ni);
1244 return 0;
6c9e5a55
AS		 1245 }
1246 lnet_net_unlock(LNET_LOCK_EX);
1247
9c26b89d
AS		 1248 CERROR("Net %s is not unique\n",
1249 libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
1250 goto failed0;
1251 }
1252 lnet_net_unlock(LNET_LOCK_EX);
1253
1254 mutex_lock(&the_lnet.ln_lnd_mutex);
1255 lnd = lnet_find_lnd_by_type(lnd_type);
1256
1257 if (!lnd) {
1258 mutex_unlock(&the_lnet.ln_lnd_mutex);
1259 rc = request_module("%s", libcfs_lnd2modname(lnd_type));
bdd84a6f 1260 mutex_lock(&the_lnet.ln_lnd_mutex);
d7e09d03 1261
9c26b89d 1262 lnd = lnet_find_lnd_by_type(lnd_type);
06ace26e 1263 if (!lnd) {
bdd84a6f 1264 mutex_unlock(&the_lnet.ln_lnd_mutex);
9c26b89d
AS		 1265 CERROR("Can't load LND %s, module %s, rc=%d\n",
1266 libcfs_lnd2str(lnd_type),
1267 libcfs_lnd2modname(lnd_type), rc);
1268 goto failed0;
d7e09d03 1269 }
9c26b89d
AS		 1270 }
1271
1272 lnet_net_lock(LNET_LOCK_EX);
1273 lnd->lnd_refcount++;
1274 lnet_net_unlock(LNET_LOCK_EX);
1275
1276 ni->ni_lnd = lnd;
1277
1278 rc = lnd->lnd_startup(ni);
1279
1280 mutex_unlock(&the_lnet.ln_lnd_mutex);
d7e09d03 1281
9c26b89d
AS		 1282 if (rc) {
1283 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
1284 rc, libcfs_lnd2str(lnd->lnd_type));
d7e09d03 1285 lnet_net_lock(LNET_LOCK_EX);
9c26b89d 1286 lnd->lnd_refcount--;
d7e09d03 1287 lnet_net_unlock(LNET_LOCK_EX);
9c26b89d
AS		 1288 goto failed0;
1289 }
d7e09d03 1290
9c26b89d
AS		 1291 /*
1292 * If given some LND tunable parameters, parse those now to
1293 * override the values in the NI structure.
1294 */
1295 if (peer_buf_cr >= 0)
1296 ni->ni_peerrtrcredits = peer_buf_cr;
1297 if (peer_timeout >= 0)
1298 ni->ni_peertimeout = peer_timeout;
1299 /*
1300 * TODO
1301 * Note: For now, don't allow the user to change
1302 * peertxcredits as this number is used in the
1303 * IB LND to control queue depth.
1304 * if (peer_cr != -1)
1305 * ni->ni_peertxcredits = peer_cr;
1306 */
1307 if (credits >= 0)
1308 ni->ni_maxtxcredits = credits;
d7e09d03 1309
9c26b89d 1310 LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query);
d7e09d03 1311
9c26b89d
AS		 1312 lnet_net_lock(LNET_LOCK_EX);
1313 /* refcount for ln_nis */
1314 lnet_ni_addref_locked(ni, 0);
1315 list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
1316 if (ni->ni_cpts) {
1317 lnet_ni_addref_locked(ni, 0);
1318 list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt);
1319 }
d7e09d03 1320
9c26b89d 1321 lnet_net_unlock(LNET_LOCK_EX);
d7e09d03 1322
9c26b89d
AS		 1323 if (lnd->lnd_type == LOLND) {
1324 lnet_ni_addref(ni);
1325 LASSERT(!the_lnet.ln_loni);
1326 the_lnet.ln_loni = ni;
1327 return 0;
1328 }
1329
1330 if (!ni->ni_peertxcredits || !ni->ni_maxtxcredits) {
1331 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1332 libcfs_lnd2str(lnd->lnd_type),
1333 !ni->ni_peertxcredits ?
1334 "" : "per-peer ");
6c9e5a55 1335 /*
9c26b89d
AS		 1336 * shutdown the NI since if we get here then it must've already
1337 * been started
6c9e5a55 1338 */
9c26b89d
AS		 1339 lnet_shutdown_lndni(ni);
1340 return -EINVAL;
1341 }
d7e09d03 1342
9c26b89d
AS		 1343 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
1344 tq->tq_credits_min =
1345 tq->tq_credits_max =
1346 tq->tq_credits = lnet_ni_tq_credits(ni);
1347 }
d7e09d03 1348
9c26b89d
AS		 1349 CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
1350 libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
1351 lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
1352 ni->ni_peerrtrcredits, ni->ni_peertimeout);
d7e09d03 1353
9c26b89d
AS		 1354 return 0;
1355failed0:
1356 lnet_ni_free(ni);
1357 return -EINVAL;
1358}
d7e09d03 1359
9c26b89d
AS		 1360static int
1361lnet_startup_lndnis(struct list_head *nilist)
1362{
1363 struct lnet_ni *ni;
1364 int rc;
1365 int lnd_type;
1366 int ni_count = 0;
6c9e5a55 1367
9c26b89d
AS		 1368 while (!list_empty(nilist)) {
1369 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
1370 list_del(&ni->ni_list);
1371 rc = lnet_startup_lndni(ni, -1, -1, -1, -1);
d7e09d03 1372
9c26b89d 1373 if (rc < 0)
d7e09d03 1374 goto failed;
d7e09d03 1375
9c26b89d
AS		 1376 ni_count++;
1377 }
d7e09d03 1378
9c26b89d
AS		 1379 if (the_lnet.ln_eq_waitni && ni_count > 1) {
1380 lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
1381 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network\n",
1382 libcfs_lnd2str(lnd_type));
1383 rc = -EINVAL;
1384 goto failed;
d7e09d03
PT		 1385 }
1386
9c26b89d 1387 return ni_count;
6c9e5a55 1388failed:
9c26b89d
AS		 1389 lnet_shutdown_lndnis();
1390
1391 return rc;
d7e09d03
PT		 1392}
1393
1394/**
1395 * Initialize LNet library.
1396 *
1397 * Only userspace program needs to call this function - it's automatically
a9cf72b6
JS		 1398 * called in the kernel at module loading time. Caller has to call lnet_fini()
1399 * after a call to lnet_init(), if and only if the latter returned 0. It must
d7e09d03
PT		 1400 * be called exactly once.
1401 *
1402 * \return 0 on success, and -ve on failures.
1403 */
1404int
a9cf72b6 1405lnet_init(void)
d7e09d03 1406{
7e7ab095 1407 int rc;
d7e09d03
PT		 1408
1409 lnet_assert_wire_constants();
1410 LASSERT(!the_lnet.ln_init);
1411
1412 memset(&the_lnet, 0, sizeof(the_lnet));
1413
1414 /* refer to global cfs_cpt_table for now */
1415 the_lnet.ln_cpt_table = cfs_cpt_table;
1416 the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
1417
1418 LASSERT(the_lnet.ln_cpt_number > 0);
1419 if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
1420 /* we are under risk of consuming all lh_cookie */
8ad5360a 1421 CERROR("Can't have %d CPTs for LNet (max allowed is %d), please change setting of CPT-table and retry\n",
d7e09d03
PT		 1422 the_lnet.ln_cpt_number, LNET_CPT_MAX);
1423 return -1;
1424 }
1425
1426 while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
1427 the_lnet.ln_cpt_bits++;
1428
1429 rc = lnet_create_locks();
5fd88337 1430 if (rc) {
d7e09d03
PT		 1431 CERROR("Can't create LNet global locks: %d\n", rc);
1432 return -1;
1433 }
1434
1435 the_lnet.ln_refcount = 0;
1436 the_lnet.ln_init = 1;
1437 LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
1438 INIT_LIST_HEAD(&the_lnet.ln_lnds);
1439 INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
1440 INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
1441
4420cfd3
JS		 1442 /*
1443 * The hash table size is the number of bits it takes to express the set
d7e09d03 1444 * ln_num_routes, minus 1 (better to under estimate than over so we
4420cfd3
JS		 1445 * don't waste memory).
1446 */
d7e09d03
PT		 1447 if (rnet_htable_size <= 0)
1448 rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
1449 else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
1450 rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
1451 the_lnet.ln_remote_nets_hbits = max_t(int, 1,
1452 order_base_2(rnet_htable_size) - 1);
1453
4420cfd3
JS		 1454 /*
1455 * All LNDs apart from the LOLND are in separate modules. They
d7e09d03 1456 * register themselves when their module loads, and unregister
4420cfd3
JS		 1457 * themselves when their module is unloaded.
1458 */
d7e09d03
PT		 1459 lnet_register_lnd(&the_lolnd);
1460 return 0;
1461}
d7e09d03
PT		 1462
1463/**
1464 * Finalize LNet library.
1465 *
1466 * Only userspace program needs to call this function. It can be called
1467 * at most once.
1468 *
a9cf72b6 1469 * \pre lnet_init() called with success.
d7e09d03
PT		 1470 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1471 */
1472void
a9cf72b6 1473lnet_fini(void)
d7e09d03
PT		 1474{
1475 LASSERT(the_lnet.ln_init);
5fd88337 1476 LASSERT(!the_lnet.ln_refcount);
d7e09d03
PT		 1477
1478 while (!list_empty(&the_lnet.ln_lnds))
1479 lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
c314c319 1480 lnd_t, lnd_list));
d7e09d03
PT		 1481 lnet_destroy_locks();
1482
1483 the_lnet.ln_init = 0;
1484}
d7e09d03
PT		 1485
1486/**
1487 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1488 *
a9cf72b6 1489 * Userspace program should call this after a successful call to lnet_init().
d7e09d03
PT		 1490 * Users must call this function at least once before any other functions.
1491 * For each successful call there must be a corresponding call to
1492 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1493 * ignored.
1494 *
1495 * The PID used by LNet may be different from the one requested.
1496 * See LNetGetId().
1497 *
1498 * \param requested_pid PID requested by the caller.
1499 *
1500 * \return >= 0 on success, and < 0 error code on failures.
1501 */
1502int
1503LNetNIInit(lnet_pid_t requested_pid)
1504{
7e7ab095 1505 int im_a_router = 0;
9c26b89d
AS		 1506 int rc, rc2;
1507 int ni_count;
6c9e5a55
AS		 1508 lnet_ping_info_t *pinfo;
1509 lnet_handle_md_t md_handle;
1510 struct list_head net_head;
6c9e5a55
AS		 1511
1512 INIT_LIST_HEAD(&net_head);
d7e09d03 1513
bdd84a6f 1514 mutex_lock(&the_lnet.ln_api_mutex);
d7e09d03 1515
3b7566d9 1516 LASSERT(the_lnet.ln_init);
d7e09d03
PT		 1517 CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
1518
1519 if (the_lnet.ln_refcount > 0) {
1520 rc = the_lnet.ln_refcount++;
6c9e5a55
AS		 1521 mutex_unlock(&the_lnet.ln_api_mutex);
1522 return rc;
d7e09d03
PT		 1523 }
1524
d7e09d03 1525 rc = lnet_prepare(requested_pid);
9c26b89d
AS		 1526 if (rc) {
1527 mutex_unlock(&the_lnet.ln_api_mutex);
1528 return rc;
1529 }
d7e09d03 1530
9c26b89d
AS		 1531 /* Add in the loopback network */
1532 if (!lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head)) {
1533 rc = -ENOMEM;
1534 goto err_empty_list;
1535 }
6c9e5a55 1536
9c26b89d
AS		 1537 /*
1538 * If LNet is being initialized via DLC it is possible
1539 * that the user requests not to load module parameters (ones which
1540 * are supported by DLC) on initialization. Therefore, make sure not
1541 * to load networks, routes and forwarding from module parameters
1542 * in this case. On cleanup in case of failure only clean up
1543 * routes if it has been loaded
1544 */
1545 if (!the_lnet.ln_nis_from_mod_params) {
1546 rc = lnet_parse_networks(&net_head, lnet_get_networks());
1547 if (rc < 0)
1548 goto err_empty_list;
1549 }
d7e09d03 1550
9c26b89d
AS		 1551 ni_count = lnet_startup_lndnis(&net_head);
1552 if (ni_count < 0) {
1553 rc = ni_count;
1554 goto err_empty_list;
6c9e5a55
AS		 1555 }
1556
9c26b89d
AS		 1557 if (!the_lnet.ln_nis_from_mod_params) {
1558 rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
1559 if (rc)
1560 goto err_shutdown_lndnis;
d7e09d03 1561
9c26b89d
AS		 1562 rc = lnet_check_routes();
1563 if (rc)
1564 goto err_destory_routes;
d7e09d03 1565
9c26b89d
AS		 1566 rc = lnet_rtrpools_alloc(im_a_router);
1567 if (rc)
1568 goto err_destory_routes;
1569 }
d7e09d03
PT		 1570
1571 rc = lnet_acceptor_start();
5fd88337 1572 if (rc)
9c26b89d 1573 goto err_destory_routes;
d7e09d03
PT		 1574
1575 the_lnet.ln_refcount = 1;
1576 /* Now I may use my own API functions... */
1577
6c9e5a55 1578 rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
5fd88337 1579 if (rc)
9c26b89d 1580 goto err_acceptor_stop;
d7e09d03 1581
6c9e5a55
AS		 1582 lnet_ping_target_update(pinfo, md_handle);
1583
d7e09d03 1584 rc = lnet_router_checker_start();
5fd88337 1585 if (rc)
9c26b89d 1586 goto err_stop_ping;
d7e09d03 1587
b03f395a 1588 lnet_router_debugfs_init();
6c9e5a55
AS		 1589
1590 mutex_unlock(&the_lnet.ln_api_mutex);
1591
1592 return 0;
d7e09d03 1593
9c26b89d 1594err_stop_ping:
6c9e5a55
AS		 1595 lnet_ping_md_unlink(pinfo, &md_handle);
1596 lnet_ping_info_free(pinfo);
9c26b89d
AS		 1597 rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
1598 LASSERT(!rc2);
1599err_acceptor_stop:
1600 the_lnet.ln_refcount = 0;
d7e09d03 1601 lnet_acceptor_stop();
9c26b89d
AS		 1602err_destory_routes:
1603 if (!the_lnet.ln_nis_from_mod_params)
1604 lnet_destroy_routes();
1605err_shutdown_lndnis:
d7e09d03 1606 lnet_shutdown_lndnis();
9c26b89d 1607err_empty_list:
d7e09d03 1608 lnet_unprepare();
3b7566d9 1609 LASSERT(rc < 0);
bdd84a6f 1610 mutex_unlock(&the_lnet.ln_api_mutex);
6c9e5a55 1611 while (!list_empty(&net_head)) {
9c26b89d
AS		 1612 struct lnet_ni *ni;
1613
6c9e5a55
AS		 1614 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1615 list_del_init(&ni->ni_list);
1616 lnet_ni_free(ni);
1617 }
d7e09d03
PT		 1618 return rc;
1619}
1620EXPORT_SYMBOL(LNetNIInit);
1621
1622/**
1623 * Stop LNet interfaces, routing, and forwarding.
1624 *
1625 * Users must call this function once for each successful call to LNetNIInit().
1626 * Once the LNetNIFini() operation has been started, the results of pending
1627 * API operations are undefined.
1628 *
1629 * \return always 0 for current implementation.
1630 */
1631int
7d46a21a 1632LNetNIFini(void)
d7e09d03 1633{
bdd84a6f 1634 mutex_lock(&the_lnet.ln_api_mutex);
d7e09d03 1635
3b7566d9
TP		 1636 LASSERT(the_lnet.ln_init);
1637 LASSERT(the_lnet.ln_refcount > 0);
d7e09d03
PT		 1638
1639 if (the_lnet.ln_refcount != 1) {
1640 the_lnet.ln_refcount--;
1641 } else {
3b7566d9 1642 LASSERT(!the_lnet.ln_niinit_self);
d7e09d03 1643
b03f395a 1644 lnet_router_debugfs_fini();
d7e09d03
PT		 1645 lnet_router_checker_stop();
1646 lnet_ping_target_fini();
1647
1648 /* Teardown fns that use my own API functions BEFORE here */
1649 the_lnet.ln_refcount = 0;
1650
1651 lnet_acceptor_stop();
1652 lnet_destroy_routes();
1653 lnet_shutdown_lndnis();
1654 lnet_unprepare();
1655 }
1656
bdd84a6f 1657 mutex_unlock(&the_lnet.ln_api_mutex);
d7e09d03
PT		 1658 return 0;
1659}
1660EXPORT_SYMBOL(LNetNIFini);
1661
edeb5d8c
AS		 1662/**
1663 * Grabs the ni data from the ni structure and fills the out
1664 * parameters
1665 *
1666 * \param[in] ni network interface structure
1667 * \param[out] cpt_count the number of cpts the ni is on
1668 * \param[out] nid Network Interface ID
1669 * \param[out] peer_timeout NI peer timeout
1670 * \param[out] peer_tx_crdits NI peer transmit credits
1671 * \param[out] peer_rtr_credits NI peer router credits
1672 * \param[out] max_tx_credits NI max transmit credit
1673 * \param[out] net_config Network configuration
1674 */
1675static void
1676lnet_fill_ni_info(struct lnet_ni *ni, __u32 *cpt_count, __u64 *nid,
1677 int *peer_timeout, int *peer_tx_credits,
1678 int *peer_rtr_credits, int *max_tx_credits,
1679 struct lnet_ioctl_net_config *net_config)
1680{
1681 int i;
1682
1683 if (!ni)
1684 return;
1685
1686 if (!net_config)
1687 return;
1688
1689 BUILD_BUG_ON(ARRAY_SIZE(ni->ni_interfaces) !=
1690 ARRAY_SIZE(net_config->ni_interfaces));
1691
1692 for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
1693 if (!ni->ni_interfaces[i])
1694 break;
1695
1696 strncpy(net_config->ni_interfaces[i],
1697 ni->ni_interfaces[i],
1698 sizeof(net_config->ni_interfaces[i]));
1699 }
1700
1701 *nid = ni->ni_nid;
1702 *peer_timeout = ni->ni_peertimeout;
1703 *peer_tx_credits = ni->ni_peertxcredits;
1704 *peer_rtr_credits = ni->ni_peerrtrcredits;
1705 *max_tx_credits = ni->ni_maxtxcredits;
1706
1707 net_config->ni_status = ni->ni_status->ns_status;
1708
1709 if (ni->ni_cpts) {
1710 int num_cpts = min(ni->ni_ncpts, LNET_MAX_SHOW_NUM_CPT);
1711
1712 for (i = 0; i < num_cpts; i++)
1713 net_config->ni_cpts[i] = ni->ni_cpts[i];
1714
1715 *cpt_count = num_cpts;
1716 }
1717}
1718
1719int
1720lnet_get_net_config(int idx, __u32 *cpt_count, __u64 *nid, int *peer_timeout,
1721 int *peer_tx_credits, int *peer_rtr_credits,
1722 int *max_tx_credits,
1723 struct lnet_ioctl_net_config *net_config)
1724{
1725 struct lnet_ni *ni;
1726 struct list_head *tmp;
1727 int cpt, i = 0;
1728 int rc = -ENOENT;
1729
1730 cpt = lnet_net_lock_current();
1731
1732 list_for_each(tmp, &the_lnet.ln_nis) {
1733 if (i++ != idx)
1734 continue;
1735
1736 ni = list_entry(tmp, lnet_ni_t, ni_list);
1737 lnet_ni_lock(ni);
1738 lnet_fill_ni_info(ni, cpt_count, nid, peer_timeout,
1739 peer_tx_credits, peer_rtr_credits,
1740 max_tx_credits, net_config);
1741 lnet_ni_unlock(ni);
1742 rc = 0;
1743 break;
1744 }
1745
1746 lnet_net_unlock(cpt);
1747 return rc;
1748}
1749
6c9e5a55
AS		 1750int
1751lnet_dyn_add_ni(lnet_pid_t requested_pid, char *nets,
1752 __s32 peer_timeout, __s32 peer_cr, __s32 peer_buf_cr,
1753 __s32 credits)
1754{
1755 lnet_ping_info_t *pinfo;
1756 lnet_handle_md_t md_handle;
1757 struct lnet_ni *ni;
1758 struct list_head net_head;
1759 int rc;
1760
1761 INIT_LIST_HEAD(&net_head);
1762
1763 /* Create a ni structure for the network string */
1764 rc = lnet_parse_networks(&net_head, nets);
9c26b89d
AS		 1765 if (rc <= 0)
1766 return !rc ? -EINVAL : rc;
6c9e5a55
AS		 1767
1768 mutex_lock(&the_lnet.ln_api_mutex);
1769
1770 if (rc > 1) {
1771 rc = -EINVAL; /* only add one interface per call */
1772 goto failed0;
1773 }
1774
1775 rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
1776 false);
1777 if (rc)
1778 goto failed0;
1779
9c26b89d
AS		 1780 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1781 list_del_init(&ni->ni_list);
1782
1783 rc = lnet_startup_lndni(ni, peer_timeout, peer_cr,
1784 peer_buf_cr, credits);
6c9e5a55
AS		 1785 if (rc)
1786 goto failed1;
1787
1788 lnet_ping_target_update(pinfo, md_handle);
1789 mutex_unlock(&the_lnet.ln_api_mutex);
1790
1791 return 0;
1792
1793failed1:
1794 lnet_ping_md_unlink(pinfo, &md_handle);
1795 lnet_ping_info_free(pinfo);
1796failed0:
1797 mutex_unlock(&the_lnet.ln_api_mutex);
1798 while (!list_empty(&net_head)) {
1799 ni = list_entry(net_head.next, struct lnet_ni, ni_list);
1800 list_del_init(&ni->ni_list);
1801 lnet_ni_free(ni);
1802 }
1803 return rc;
1804}
1805
1806int
1807lnet_dyn_del_ni(__u32 net)
1808{
9c26b89d
AS		 1809 lnet_ni_t *ni;
1810 lnet_ping_info_t *pinfo;
1811 lnet_handle_md_t md_handle;
6c9e5a55
AS		 1812 int rc;
1813
9c26b89d
AS		 1814 /* don't allow userspace to shutdown the LOLND */
1815 if (LNET_NETTYP(net) == LOLND)
1816 return -EINVAL;
1817
6c9e5a55 1818 mutex_lock(&the_lnet.ln_api_mutex);
9c26b89d
AS		 1819 /* create and link a new ping info, before removing the old one */
1820 rc = lnet_ping_info_setup(&pinfo, &md_handle,
1821 lnet_get_ni_count() - 1, false);
1822 if (rc)
1823 goto out;
1824
1825 ni = lnet_net2ni(net);
1826 if (!ni) {
1827 rc = -EINVAL;
1828 goto failed;
1829 }
1830
1831 /* decrement the reference counter taken by lnet_net2ni() */
1832 lnet_ni_decref_locked(ni, 0);
1833
1834 lnet_shutdown_lndni(ni);
1835 lnet_ping_target_update(pinfo, md_handle);
1836 goto out;
1837failed:
1838 lnet_ping_md_unlink(pinfo, &md_handle);
1839 lnet_ping_info_free(pinfo);
1840out:
6c9e5a55
AS		 1841 mutex_unlock(&the_lnet.ln_api_mutex);
1842
1843 return rc;
1844}
1845
d7e09d03 1846/**
71c36dd7 1847 * LNet ioctl handler.
d7e09d03 1848 *
d7e09d03
PT		 1849 */
1850int
1851LNetCtl(unsigned int cmd, void *arg)
1852{
1853 struct libcfs_ioctl_data *data = arg;
2e9a51bd 1854 struct lnet_ioctl_config_data *config;
7e7ab095
MS		 1855 lnet_process_id_t id = {0};
1856 lnet_ni_t *ni;
1857 int rc;
5e50efea 1858 unsigned long secs_passed;
d7e09d03 1859
3b7566d9 1860 LASSERT(the_lnet.ln_init);
d7e09d03
PT		 1861
1862 switch (cmd) {
1863 case IOC_LIBCFS_GET_NI:
1864 rc = LNetGetId(data->ioc_count, &id);
1865 data->ioc_nid = id.nid;
1866 return rc;
1867
1868 case IOC_LIBCFS_FAIL_NID:
1869 return lnet_fail_nid(data->ioc_nid, data->ioc_count);
1870
1871 case IOC_LIBCFS_ADD_ROUTE:
edeb5d8c
AS		 1872 config = arg;
1873
1874 if (config->cfg_hdr.ioc_len < sizeof(*config))
1875 return -EINVAL;
1876
6c9e5a55 1877 mutex_lock(&the_lnet.ln_api_mutex);
edeb5d8c
AS		 1878 rc = lnet_add_route(config->cfg_net,
1879 config->cfg_config_u.cfg_route.rtr_hop,
1880 config->cfg_nid,
1881 config->cfg_config_u.cfg_route.rtr_priority);
6c9e5a55
AS		 1882 mutex_unlock(&the_lnet.ln_api_mutex);
1883 return rc ? rc : lnet_check_routes();
d7e09d03
PT		 1884
1885 case IOC_LIBCFS_DEL_ROUTE:
2e9a51bd
AS		 1886 config = arg;
1887
1888 if (config->cfg_hdr.ioc_len < sizeof(*config))
1889 return -EINVAL;
1890
6c9e5a55 1891 mutex_lock(&the_lnet.ln_api_mutex);
2e9a51bd 1892 rc = lnet_del_route(config->cfg_net, config->cfg_nid);
6c9e5a55
AS		 1893 mutex_unlock(&the_lnet.ln_api_mutex);
1894 return rc;
d7e09d03
PT		 1895
1896 case IOC_LIBCFS_GET_ROUTE:
2e9a51bd
AS		 1897 config = arg;
1898
1899 if (config->cfg_hdr.ioc_len < sizeof(*config))
1900 return -EINVAL;
1901
1902 return lnet_get_route(config->cfg_count,
1903 &config->cfg_net,
1904 &config->cfg_config_u.cfg_route.rtr_hop,
1905 &config->cfg_nid,
1906 &config->cfg_config_u.cfg_route.rtr_flags,
1907 &config->cfg_config_u.cfg_route.rtr_priority);
1908
edeb5d8c
AS		 1909 case IOC_LIBCFS_GET_NET: {
1910 struct lnet_ioctl_net_config *net_config;
1911 size_t total = sizeof(*config) + sizeof(*net_config);
2e9a51bd 1912
edeb5d8c 1913 config = arg;
2e9a51bd 1914
edeb5d8c
AS		 1915 if (config->cfg_hdr.ioc_len < total)
1916 return -EINVAL;
1917
1918 net_config = (struct lnet_ioctl_net_config *)
1919 config->cfg_bulk;
1920 if (!net_config)
1921 return -EINVAL;
1922
1923 return lnet_get_net_config(config->cfg_count,
1924 &config->cfg_ncpts,
1925 &config->cfg_nid,
1926 &config->cfg_config_u.cfg_net.net_peer_timeout,
1927 &config->cfg_config_u.cfg_net.net_peer_tx_credits,
1928 &config->cfg_config_u.cfg_net.net_peer_rtr_credits,
1929 &config->cfg_config_u.cfg_net.net_max_tx_credits,
1930 net_config);
1931 }
2e9a51bd
AS		 1932
1933 case IOC_LIBCFS_GET_LNET_STATS: {
1934 struct lnet_ioctl_lnet_stats *lnet_stats = arg;
1935
1936 if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
1937 return -EINVAL;
1938
1939 lnet_counters_get(&lnet_stats->st_cntrs);
1940 return 0;
1941 }
1942
1943 case IOC_LIBCFS_CONFIG_RTR:
edeb5d8c
AS		 1944 config = arg;
1945
1946 if (config->cfg_hdr.ioc_len < sizeof(*config))
1947 return -EINVAL;
1948
1949 mutex_lock(&the_lnet.ln_api_mutex);
1950 if (config->cfg_config_u.cfg_buffers.buf_enable) {
1951 rc = lnet_rtrpools_enable();
1952 mutex_unlock(&the_lnet.ln_api_mutex);
1953 return rc;
1954 }
1955 lnet_rtrpools_disable();
1956 mutex_unlock(&the_lnet.ln_api_mutex);
2e9a51bd
AS		 1957 return 0;
1958
1959 case IOC_LIBCFS_ADD_BUF:
edeb5d8c 1960 config = arg;
2e9a51bd 1961
edeb5d8c
AS		 1962 if (config->cfg_hdr.ioc_len < sizeof(*config))
1963 return -EINVAL;
2e9a51bd 1964
edeb5d8c
AS		 1965 mutex_lock(&the_lnet.ln_api_mutex);
1966 rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.buf_tiny,
1967 config->cfg_config_u.cfg_buffers.buf_small,
1968 config->cfg_config_u.cfg_buffers.buf_large);
1969 mutex_unlock(&the_lnet.ln_api_mutex);
1970 return rc;
1971
1972 case IOC_LIBCFS_GET_BUF: {
1973 struct lnet_ioctl_pool_cfg *pool_cfg;
1974 size_t total = sizeof(*config) + sizeof(*pool_cfg);
1975
1976 config = arg;
1977
1978 if (config->cfg_hdr.ioc_len < total)
1979 return -EINVAL;
1980
1981 pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
1982 return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
1983 }
1984
1985 case IOC_LIBCFS_GET_PEER_INFO: {
1986 struct lnet_ioctl_peer *peer_info = arg;
1987
1988 if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
1989 return -EINVAL;
1990
1991 return lnet_get_peer_info(peer_info->pr_count,
1992 &peer_info->pr_nid,
1993 peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
1994 &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
1995 &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
1996 &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
1997 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
1998 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
1999 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
2000 &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
2001 }
2e9a51bd 2002
d7e09d03 2003 case IOC_LIBCFS_NOTIFY_ROUTER:
5e50efea 2004 secs_passed = (ktime_get_real_seconds() - data->ioc_u64[0]);
d7e09d03 2005 return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
5e50efea 2006 jiffies - secs_passed * HZ);
d7e09d03 2007
d7e09d03
PT		 2008 case IOC_LIBCFS_LNET_DIST:
2009 rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
2010 if (rc < 0 && rc != -EHOSTUNREACH)
2011 return rc;
2012
2013 data->ioc_u32[0] = rc;
2014 return 0;
2015
2016 case IOC_LIBCFS_TESTPROTOCOMPAT:
2017 lnet_net_lock(LNET_LOCK_EX);
2018 the_lnet.ln_testprotocompat = data->ioc_flags;
2019 lnet_net_unlock(LNET_LOCK_EX);
2020 return 0;
2021
2022 case IOC_LIBCFS_PING:
2023 id.nid = data->ioc_nid;
2024 id.pid = data->ioc_u32[0];
2025 rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
4eb53dfd 2026 data->ioc_pbuf1,
51078e25 2027 data->ioc_plen1 / sizeof(lnet_process_id_t));
d7e09d03
PT		 2028 if (rc < 0)
2029 return rc;
2030 data->ioc_count = rc;
2031 return 0;
2032
d7e09d03
PT		 2033 default:
2034 ni = lnet_net2ni(data->ioc_net);
06ace26e 2035 if (!ni)
d7e09d03
PT		 2036 return -EINVAL;
2037
06ace26e 2038 if (!ni->ni_lnd->lnd_ctl)
d7e09d03
PT		 2039 rc = -EINVAL;
2040 else
2041 rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
2042
2043 lnet_ni_decref(ni);
2044 return rc;
2045 }
2046 /* not reached */
2047}
2048EXPORT_SYMBOL(LNetCtl);
2049
71c36dd7
OD		 2050void LNetDebugPeer(lnet_process_id_t id)
2051{
2052 lnet_debug_peer(id.nid);
2053}
2054EXPORT_SYMBOL(LNetDebugPeer);
2055
d7e09d03
PT		 2056/**
2057 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
2058 * all interfaces share a same PID, as requested by LNetNIInit().
2059 *
2060 * \param index Index of the interface to look up.
2061 * \param id On successful return, this location will hold the
2062 * lnet_process_id_t ID of the interface.
2063 *
2064 * \retval 0 If an interface exists at \a index.
2065 * \retval -ENOENT If no interface has been found.
2066 */
2067int
2068LNetGetId(unsigned int index, lnet_process_id_t *id)
2069{
7e7ab095
MS		 2070 struct lnet_ni *ni;
2071 struct list_head *tmp;
2072 int cpt;
2073 int rc = -ENOENT;
d7e09d03
PT		 2074
2075 LASSERT(the_lnet.ln_init);
4b1e84ed
PT		 2076
2077 /* LNetNI initilization failed? */
5fd88337 2078 if (!the_lnet.ln_refcount)
4b1e84ed 2079 return rc;
d7e09d03
PT		 2080
2081 cpt = lnet_net_lock_current();
2082
2083 list_for_each(tmp, &the_lnet.ln_nis) {
5fd88337 2084 if (index--)
d7e09d03
PT		 2085 continue;
2086
2087 ni = list_entry(tmp, lnet_ni_t, ni_list);
2088
2089 id->nid = ni->ni_nid;
2090 id->pid = the_lnet.ln_pid;
2091 rc = 0;
2092 break;
2093 }
2094
2095 lnet_net_unlock(cpt);
2096 return rc;
2097}
2098EXPORT_SYMBOL(LNetGetId);
2099
2100/**
2101 * Print a string representation of handle \a h into buffer \a str of
2102 * \a len bytes.
2103 */
2104void
2105LNetSnprintHandle(char *str, int len, lnet_handle_any_t h)
2106{
55f5a824 2107 snprintf(str, len, "%#llx", h.cookie);
d7e09d03
PT		 2108}
2109EXPORT_SYMBOL(LNetSnprintHandle);
2110
fccfde7d 2111static int lnet_ping(lnet_process_id_t id, int timeout_ms,
4eb53dfd 2112 lnet_process_id_t __user *ids, int n_ids)
d7e09d03 2113{
7e7ab095
MS		 2114 lnet_handle_eq_t eqh;
2115 lnet_handle_md_t mdh;
2116 lnet_event_t event;
2117 lnet_md_t md = { NULL };
2118 int which;
2119 int unlinked = 0;
2120 int replied = 0;
2121 const int a_long_time = 60000; /* mS */
6c9e5a55 2122 int infosz;
7e7ab095
MS		 2123 lnet_ping_info_t *info;
2124 lnet_process_id_t tmpid;
2125 int i;
2126 int nob;
2127 int rc;
2128 int rc2;
2129 sigset_t blocked;
d7e09d03 2130
6c9e5a55
AS		 2131 infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
2132
d7e09d03
PT		 2133 if (n_ids <= 0 ||
2134 id.nid == LNET_NID_ANY ||
2135 timeout_ms > 500000 || /* arbitrary limit! */
2136 n_ids > 20) /* arbitrary limit! */
2137 return -EINVAL;
2138
2139 if (id.pid == LNET_PID_ANY)
fe7cb65d 2140 id.pid = LNET_PID_LUSTRE;
d7e09d03
PT		 2141
2142 LIBCFS_ALLOC(info, infosz);
06ace26e 2143 if (!info)
d7e09d03
PT		 2144 return -ENOMEM;
2145
2146 /* NB 2 events max (including any unlink event) */
2147 rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
5fd88337 2148 if (rc) {
d7e09d03
PT		 2149 CERROR("Can't allocate EQ: %d\n", rc);
2150 goto out_0;
2151 }
2152
2153 /* initialize md content */
2154 md.start = info;
2155 md.length = infosz;
2156 md.threshold = 2; /*GET/REPLY*/
2157 md.max_size = 0;
2158 md.options = LNET_MD_TRUNCATE;
2159 md.user_ptr = NULL;
2160 md.eq_handle = eqh;
2161
2162 rc = LNetMDBind(md, LNET_UNLINK, &mdh);
5fd88337 2163 if (rc) {
d7e09d03
PT		 2164 CERROR("Can't bind MD: %d\n", rc);
2165 goto out_1;
2166 }
2167
2168 rc = LNetGet(LNET_NID_ANY, mdh, id,
2169 LNET_RESERVED_PORTAL,
2170 LNET_PROTO_PING_MATCHBITS, 0);
2171
5fd88337 2172 if (rc) {
d7e09d03
PT		 2173 /* Don't CERROR; this could be deliberate! */
2174
2175 rc2 = LNetMDUnlink(mdh);
5fd88337 2176 LASSERT(!rc2);
d7e09d03
PT		 2177
2178 /* NB must wait for the UNLINK event below... */
2179 unlinked = 1;
2180 timeout_ms = a_long_time;
2181 }
2182
2183 do {
2184 /* MUST block for unlink to complete */
2185 if (unlinked)
2186 blocked = cfs_block_allsigs();
2187
2188 rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
2189
2190 if (unlinked)
2191 cfs_restore_sigs(blocked);
2192
2193 CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
2194 (rc2 <= 0) ? -1 : event.type,
2195 (rc2 <= 0) ? -1 : event.status,
2196 (rc2 > 0 && event.unlinked) ? " unlinked" : "");
2197
3b7566d9 2198 LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
d7e09d03 2199
5fd88337 2200 if (rc2 <= 0 || event.status) {
d7e09d03 2201 /* timeout or error */
5fd88337 2202 if (!replied && !rc)
d7e09d03 2203 rc = (rc2 < 0) ? rc2 :
5fd88337 2204 !rc2 ? -ETIMEDOUT :
d7e09d03
PT		 2205 event.status;
2206
2207 if (!unlinked) {
2208 /* Ensure completion in finite time... */
2209 LNetMDUnlink(mdh);
2210 /* No assertion (racing with network) */
2211 unlinked = 1;
2212 timeout_ms = a_long_time;
5fd88337 2213 } else if (!rc2) {
d7e09d03
PT		 2214 /* timed out waiting for unlink */
2215 CWARN("ping %s: late network completion\n",
2216 libcfs_id2str(id));
2217 }
2218 } else if (event.type == LNET_EVENT_REPLY) {
2219 replied = 1;
2220 rc = event.mlength;
2221 }
2222
2223 } while (rc2 <= 0 || !event.unlinked);
2224
2225 if (!replied) {
2226 if (rc >= 0)
2227 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
2228 libcfs_id2str(id));
2229 rc = -EIO;
2230 goto out_1;
2231 }
2232
2233 nob = rc;
3b7566d9 2234 LASSERT(nob >= 0 && nob <= infosz);
d7e09d03
PT		 2235
2236 rc = -EPROTO; /* if I can't parse... */
2237
2238 if (nob < 8) {
2239 /* can't check magic/version */
2240 CERROR("%s: ping info too short %d\n",
2241 libcfs_id2str(id), nob);
2242 goto out_1;
2243 }
2244
2245 if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
2246 lnet_swap_pinginfo(info);
2247 } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
2248 CERROR("%s: Unexpected magic %08x\n",
2249 libcfs_id2str(id), info->pi_magic);
2250 goto out_1;
2251 }
2252
5fd88337 2253 if (!(info->pi_features & LNET_PING_FEAT_NI_STATUS)) {
d7e09d03
PT		 2254 CERROR("%s: ping w/o NI status: 0x%x\n",
2255 libcfs_id2str(id), info->pi_features);
2256 goto out_1;
2257 }
2258
2259 if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
2260 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
2261 nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
2262 goto out_1;
2263 }
2264
2265 if (info->pi_nnis < n_ids)
2266 n_ids = info->pi_nnis;
2267
2268 if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
2269 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
2270 nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
2271 goto out_1;
2272 }
2273
2274 rc = -EFAULT; /* If I SEGV... */
2275
751a624a 2276 memset(&tmpid, 0, sizeof(tmpid));
d7e09d03
PT		 2277 for (i = 0; i < n_ids; i++) {
2278 tmpid.pid = info->pi_pid;
2279 tmpid.nid = info->pi_ni[i].ns_nid;
2280 if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
2281 goto out_1;
2282 }
2283 rc = info->pi_nnis;
2284
2285 out_1:
2286 rc2 = LNetEQFree(eqh);
5fd88337 2287 if (rc2)
d7e09d03 2288 CERROR("rc2 %d\n", rc2);
5fd88337 2289 LASSERT(!rc2);
d7e09d03
PT		 2290
2291 out_0:
2292 LIBCFS_FREE(info, infosz);
2293 return rc;
2294}
Linux kernel - Deliverables
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