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.sun.com/software/products/lustre/docs/GPLv2.pdf
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
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LNET
38 #include <linux/lnet/lib-lnet.h>
39 #include <linux/log2.h>
41 #define D_LNI D_CONSOLE
43 lnet_t the_lnet
; /* THE state of the network */
44 EXPORT_SYMBOL(the_lnet
);
47 static char *ip2nets
= "";
48 module_param(ip2nets
, charp
, 0444);
49 MODULE_PARM_DESC(ip2nets
, "LNET network <- IP table");
51 static char *networks
= "";
52 module_param(networks
, charp
, 0444);
53 MODULE_PARM_DESC(networks
, "local networks");
55 static char *routes
= "";
56 module_param(routes
, charp
, 0444);
57 MODULE_PARM_DESC(routes
, "routes to non-local networks");
59 static int rnet_htable_size
= LNET_REMOTE_NETS_HASH_DEFAULT
;
60 module_param(rnet_htable_size
, int, 0444);
61 MODULE_PARM_DESC(rnet_htable_size
, "size of remote network hash table");
70 lnet_get_networks(void)
75 if (*networks
!= 0 && *ip2nets
!= 0) {
76 LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
77 "'ip2nets' but not both at once\n");
82 rc
= lnet_parse_ip2nets(&nets
, ip2nets
);
83 return (rc
== 0) ? nets
: NULL
;
95 spin_lock_init(&the_lnet
.ln_eq_wait_lock
);
96 init_waitqueue_head(&the_lnet
.ln_eq_waitq
);
97 mutex_init(&the_lnet
.ln_lnd_mutex
);
98 mutex_init(&the_lnet
.ln_api_mutex
);
102 lnet_fini_locks(void)
108 lnet_create_remote_nets_table(void)
111 struct list_head
*hash
;
113 LASSERT(the_lnet
.ln_remote_nets_hash
== NULL
);
114 LASSERT(the_lnet
.ln_remote_nets_hbits
> 0);
115 LIBCFS_ALLOC(hash
, LNET_REMOTE_NETS_HASH_SIZE
* sizeof(*hash
));
117 CERROR("Failed to create remote nets hash table\n");
121 for (i
= 0; i
< LNET_REMOTE_NETS_HASH_SIZE
; i
++)
122 INIT_LIST_HEAD(&hash
[i
]);
123 the_lnet
.ln_remote_nets_hash
= hash
;
128 lnet_destroy_remote_nets_table(void)
132 if (the_lnet
.ln_remote_nets_hash
== NULL
)
135 for (i
= 0; i
< LNET_REMOTE_NETS_HASH_SIZE
; i
++)
136 LASSERT(list_empty(&the_lnet
.ln_remote_nets_hash
[i
]));
138 LIBCFS_FREE(the_lnet
.ln_remote_nets_hash
,
139 LNET_REMOTE_NETS_HASH_SIZE
*
140 sizeof(the_lnet
.ln_remote_nets_hash
[0]));
141 the_lnet
.ln_remote_nets_hash
= NULL
;
145 lnet_destroy_locks(void)
147 if (the_lnet
.ln_res_lock
!= NULL
) {
148 cfs_percpt_lock_free(the_lnet
.ln_res_lock
);
149 the_lnet
.ln_res_lock
= NULL
;
152 if (the_lnet
.ln_net_lock
!= NULL
) {
153 cfs_percpt_lock_free(the_lnet
.ln_net_lock
);
154 the_lnet
.ln_net_lock
= NULL
;
161 lnet_create_locks(void)
165 the_lnet
.ln_res_lock
= cfs_percpt_lock_alloc(lnet_cpt_table());
166 if (the_lnet
.ln_res_lock
== NULL
)
169 the_lnet
.ln_net_lock
= cfs_percpt_lock_alloc(lnet_cpt_table());
170 if (the_lnet
.ln_net_lock
== NULL
)
176 lnet_destroy_locks();
180 static void lnet_assert_wire_constants (void)
182 /* Wire protocol assertions generated by 'wirecheck'
183 * running on Linux robert.bartonsoftware.com 2.6.8-1.521
184 * #1 Mon Aug 16 09:01:18 EDT 2004 i686 athlon i386 GNU/Linux
185 * with gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) */
188 CLASSERT (LNET_PROTO_TCP_MAGIC
== 0xeebc0ded);
189 CLASSERT (LNET_PROTO_TCP_VERSION_MAJOR
== 1);
190 CLASSERT (LNET_PROTO_TCP_VERSION_MINOR
== 0);
191 CLASSERT (LNET_MSG_ACK
== 0);
192 CLASSERT (LNET_MSG_PUT
== 1);
193 CLASSERT (LNET_MSG_GET
== 2);
194 CLASSERT (LNET_MSG_REPLY
== 3);
195 CLASSERT (LNET_MSG_HELLO
== 4);
197 /* Checks for struct ptl_handle_wire_t */
198 CLASSERT ((int)sizeof(lnet_handle_wire_t
) == 16);
199 CLASSERT ((int)offsetof(lnet_handle_wire_t
, wh_interface_cookie
) == 0);
200 CLASSERT ((int)sizeof(((lnet_handle_wire_t
*)0)->wh_interface_cookie
) == 8);
201 CLASSERT ((int)offsetof(lnet_handle_wire_t
, wh_object_cookie
) == 8);
202 CLASSERT ((int)sizeof(((lnet_handle_wire_t
*)0)->wh_object_cookie
) == 8);
204 /* Checks for struct lnet_magicversion_t */
205 CLASSERT ((int)sizeof(lnet_magicversion_t
) == 8);
206 CLASSERT ((int)offsetof(lnet_magicversion_t
, magic
) == 0);
207 CLASSERT ((int)sizeof(((lnet_magicversion_t
*)0)->magic
) == 4);
208 CLASSERT ((int)offsetof(lnet_magicversion_t
, version_major
) == 4);
209 CLASSERT ((int)sizeof(((lnet_magicversion_t
*)0)->version_major
) == 2);
210 CLASSERT ((int)offsetof(lnet_magicversion_t
, version_minor
) == 6);
211 CLASSERT ((int)sizeof(((lnet_magicversion_t
*)0)->version_minor
) == 2);
213 /* Checks for struct lnet_hdr_t */
214 CLASSERT ((int)sizeof(lnet_hdr_t
) == 72);
215 CLASSERT ((int)offsetof(lnet_hdr_t
, dest_nid
) == 0);
216 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->dest_nid
) == 8);
217 CLASSERT ((int)offsetof(lnet_hdr_t
, src_nid
) == 8);
218 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->src_nid
) == 8);
219 CLASSERT ((int)offsetof(lnet_hdr_t
, dest_pid
) == 16);
220 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->dest_pid
) == 4);
221 CLASSERT ((int)offsetof(lnet_hdr_t
, src_pid
) == 20);
222 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->src_pid
) == 4);
223 CLASSERT ((int)offsetof(lnet_hdr_t
, type
) == 24);
224 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->type
) == 4);
225 CLASSERT ((int)offsetof(lnet_hdr_t
, payload_length
) == 28);
226 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->payload_length
) == 4);
227 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
) == 32);
228 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
) == 40);
231 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.ack
.dst_wmd
) == 32);
232 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.ack
.dst_wmd
) == 16);
233 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.ack
.match_bits
) == 48);
234 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.ack
.match_bits
) == 8);
235 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.ack
.mlength
) == 56);
236 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.ack
.mlength
) == 4);
239 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.put
.ack_wmd
) == 32);
240 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.put
.ack_wmd
) == 16);
241 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.put
.match_bits
) == 48);
242 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.put
.match_bits
) == 8);
243 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.put
.hdr_data
) == 56);
244 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.put
.hdr_data
) == 8);
245 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.put
.ptl_index
) == 64);
246 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.put
.ptl_index
) == 4);
247 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.put
.offset
) == 68);
248 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.put
.offset
) == 4);
251 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.get
.return_wmd
) == 32);
252 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.get
.return_wmd
) == 16);
253 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.get
.match_bits
) == 48);
254 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.get
.match_bits
) == 8);
255 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.get
.ptl_index
) == 56);
256 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.get
.ptl_index
) == 4);
257 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.get
.src_offset
) == 60);
258 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.get
.src_offset
) == 4);
259 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.get
.sink_length
) == 64);
260 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.get
.sink_length
) == 4);
263 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.reply
.dst_wmd
) == 32);
264 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.reply
.dst_wmd
) == 16);
267 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.hello
.incarnation
) == 32);
268 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.hello
.incarnation
) == 8);
269 CLASSERT ((int)offsetof(lnet_hdr_t
, msg
.hello
.type
) == 40);
270 CLASSERT ((int)sizeof(((lnet_hdr_t
*)0)->msg
.hello
.type
) == 4);
274 lnet_find_lnd_by_type (int type
)
277 struct list_head
*tmp
;
279 /* holding lnd mutex */
280 list_for_each (tmp
, &the_lnet
.ln_lnds
) {
281 lnd
= list_entry(tmp
, lnd_t
, lnd_list
);
283 if ((int)lnd
->lnd_type
== type
)
291 lnet_register_lnd (lnd_t
*lnd
)
293 LNET_MUTEX_LOCK(&the_lnet
.ln_lnd_mutex
);
295 LASSERT (the_lnet
.ln_init
);
296 LASSERT (libcfs_isknown_lnd(lnd
->lnd_type
));
297 LASSERT (lnet_find_lnd_by_type(lnd
->lnd_type
) == NULL
);
299 list_add_tail (&lnd
->lnd_list
, &the_lnet
.ln_lnds
);
300 lnd
->lnd_refcount
= 0;
302 CDEBUG(D_NET
, "%s LND registered\n", libcfs_lnd2str(lnd
->lnd_type
));
304 LNET_MUTEX_UNLOCK(&the_lnet
.ln_lnd_mutex
);
306 EXPORT_SYMBOL(lnet_register_lnd
);
309 lnet_unregister_lnd (lnd_t
*lnd
)
311 LNET_MUTEX_LOCK(&the_lnet
.ln_lnd_mutex
);
313 LASSERT (the_lnet
.ln_init
);
314 LASSERT (lnet_find_lnd_by_type(lnd
->lnd_type
) == lnd
);
315 LASSERT (lnd
->lnd_refcount
== 0);
317 list_del (&lnd
->lnd_list
);
318 CDEBUG(D_NET
, "%s LND unregistered\n", libcfs_lnd2str(lnd
->lnd_type
));
320 LNET_MUTEX_UNLOCK(&the_lnet
.ln_lnd_mutex
);
322 EXPORT_SYMBOL(lnet_unregister_lnd
);
325 lnet_counters_get(lnet_counters_t
*counters
)
327 lnet_counters_t
*ctr
;
330 memset(counters
, 0, sizeof(*counters
));
332 lnet_net_lock(LNET_LOCK_EX
);
334 cfs_percpt_for_each(ctr
, i
, the_lnet
.ln_counters
) {
335 counters
->msgs_max
+= ctr
->msgs_max
;
336 counters
->msgs_alloc
+= ctr
->msgs_alloc
;
337 counters
->errors
+= ctr
->errors
;
338 counters
->send_count
+= ctr
->send_count
;
339 counters
->recv_count
+= ctr
->recv_count
;
340 counters
->route_count
+= ctr
->route_count
;
341 counters
->drop_count
+= ctr
->drop_count
;
342 counters
->send_length
+= ctr
->send_length
;
343 counters
->recv_length
+= ctr
->recv_length
;
344 counters
->route_length
+= ctr
->route_length
;
345 counters
->drop_length
+= ctr
->drop_length
;
348 lnet_net_unlock(LNET_LOCK_EX
);
350 EXPORT_SYMBOL(lnet_counters_get
);
353 lnet_counters_reset(void)
355 lnet_counters_t
*counters
;
358 lnet_net_lock(LNET_LOCK_EX
);
360 cfs_percpt_for_each(counters
, i
, the_lnet
.ln_counters
)
361 memset(counters
, 0, sizeof(lnet_counters_t
));
363 lnet_net_unlock(LNET_LOCK_EX
);
365 EXPORT_SYMBOL(lnet_counters_reset
);
367 #ifdef LNET_USE_LIB_FREELIST
370 lnet_freelist_init (lnet_freelist_t
*fl
, int n
, int size
)
376 size
+= offsetof (lnet_freeobj_t
, fo_contents
);
378 LIBCFS_ALLOC(space
, n
* size
);
382 INIT_LIST_HEAD (&fl
->fl_list
);
385 fl
->fl_objsize
= size
;
389 memset (space
, 0, size
);
390 list_add ((struct list_head
*)space
, &fl
->fl_list
);
398 lnet_freelist_fini (lnet_freelist_t
*fl
)
400 struct list_head
*el
;
403 if (fl
->fl_nobjs
== 0)
407 for (el
= fl
->fl_list
.next
; el
!= &fl
->fl_list
; el
= el
->next
)
410 LASSERT (count
== fl
->fl_nobjs
);
412 LIBCFS_FREE(fl
->fl_objs
, fl
->fl_nobjs
* fl
->fl_objsize
);
413 memset (fl
, 0, sizeof (*fl
));
416 #endif /* LNET_USE_LIB_FREELIST */
419 lnet_create_interface_cookie (void)
421 /* NB the interface cookie in wire handles guards against delayed
422 * replies and ACKs appearing valid after reboot. Initialisation time,
423 * even if it's only implemented to millisecond resolution is probably
424 * easily good enough. */
427 do_gettimeofday(&tv
);
430 cookie
+= tv
.tv_usec
;
435 lnet_res_type2str(int type
)
440 case LNET_COOKIE_TYPE_MD
:
442 case LNET_COOKIE_TYPE_ME
:
444 case LNET_COOKIE_TYPE_EQ
:
450 lnet_res_container_cleanup(struct lnet_res_container
*rec
)
454 if (rec
->rec_type
== 0) /* not set yet, it's uninitialized */
457 while (!list_empty(&rec
->rec_active
)) {
458 struct list_head
*e
= rec
->rec_active
.next
;
461 if (rec
->rec_type
== LNET_COOKIE_TYPE_EQ
) {
462 lnet_eq_free(list_entry(e
, lnet_eq_t
, eq_list
));
464 } else if (rec
->rec_type
== LNET_COOKIE_TYPE_MD
) {
465 lnet_md_free(list_entry(e
, lnet_libmd_t
, md_list
));
467 } else { /* NB: Active MEs should be attached on portals */
474 /* Found alive MD/ME/EQ, user really should unlink/free
475 * all of them before finalize LNet, but if someone didn't,
476 * we have to recycle garbage for him */
477 CERROR("%d active elements on exit of %s container\n",
478 count
, lnet_res_type2str(rec
->rec_type
));
481 #ifdef LNET_USE_LIB_FREELIST
482 lnet_freelist_fini(&rec
->rec_freelist
);
484 if (rec
->rec_lh_hash
!= NULL
) {
485 LIBCFS_FREE(rec
->rec_lh_hash
,
486 LNET_LH_HASH_SIZE
* sizeof(rec
->rec_lh_hash
[0]));
487 rec
->rec_lh_hash
= NULL
;
490 rec
->rec_type
= 0; /* mark it as finalized */
494 lnet_res_container_setup(struct lnet_res_container
*rec
,
495 int cpt
, int type
, int objnum
, int objsz
)
500 LASSERT(rec
->rec_type
== 0);
502 rec
->rec_type
= type
;
503 INIT_LIST_HEAD(&rec
->rec_active
);
505 #ifdef LNET_USE_LIB_FREELIST
506 memset(&rec
->rec_freelist
, 0, sizeof(rec
->rec_freelist
));
507 rc
= lnet_freelist_init(&rec
->rec_freelist
, objnum
, objsz
);
511 rec
->rec_lh_cookie
= (cpt
<< LNET_COOKIE_TYPE_BITS
) | type
;
513 /* Arbitrary choice of hash table size */
514 LIBCFS_CPT_ALLOC(rec
->rec_lh_hash
, lnet_cpt_table(), cpt
,
515 LNET_LH_HASH_SIZE
* sizeof(rec
->rec_lh_hash
[0]));
516 if (rec
->rec_lh_hash
== NULL
) {
521 for (i
= 0; i
< LNET_LH_HASH_SIZE
; i
++)
522 INIT_LIST_HEAD(&rec
->rec_lh_hash
[i
]);
527 CERROR("Failed to setup %s resource container\n",
528 lnet_res_type2str(type
));
529 lnet_res_container_cleanup(rec
);
534 lnet_res_containers_destroy(struct lnet_res_container
**recs
)
536 struct lnet_res_container
*rec
;
539 cfs_percpt_for_each(rec
, i
, recs
)
540 lnet_res_container_cleanup(rec
);
542 cfs_percpt_free(recs
);
545 static struct lnet_res_container
**
546 lnet_res_containers_create(int type
, int objnum
, int objsz
)
548 struct lnet_res_container
**recs
;
549 struct lnet_res_container
*rec
;
553 recs
= cfs_percpt_alloc(lnet_cpt_table(), sizeof(*rec
));
555 CERROR("Failed to allocate %s resource containers\n",
556 lnet_res_type2str(type
));
560 cfs_percpt_for_each(rec
, i
, recs
) {
561 rc
= lnet_res_container_setup(rec
, i
, type
, objnum
, objsz
);
563 lnet_res_containers_destroy(recs
);
572 lnet_res_lh_lookup(struct lnet_res_container
*rec
, __u64 cookie
)
574 /* ALWAYS called with lnet_res_lock held */
575 struct list_head
*head
;
576 lnet_libhandle_t
*lh
;
579 if ((cookie
& LNET_COOKIE_MASK
) != rec
->rec_type
)
582 hash
= cookie
>> (LNET_COOKIE_TYPE_BITS
+ LNET_CPT_BITS
);
583 head
= &rec
->rec_lh_hash
[hash
& LNET_LH_HASH_MASK
];
585 list_for_each_entry(lh
, head
, lh_hash_chain
) {
586 if (lh
->lh_cookie
== cookie
)
594 lnet_res_lh_initialize(struct lnet_res_container
*rec
, lnet_libhandle_t
*lh
)
596 /* ALWAYS called with lnet_res_lock held */
597 unsigned int ibits
= LNET_COOKIE_TYPE_BITS
+ LNET_CPT_BITS
;
600 lh
->lh_cookie
= rec
->rec_lh_cookie
;
601 rec
->rec_lh_cookie
+= 1 << ibits
;
603 hash
= (lh
->lh_cookie
>> ibits
) & LNET_LH_HASH_MASK
;
605 list_add(&lh
->lh_hash_chain
, &rec
->rec_lh_hash
[hash
]);
609 int lnet_unprepare(void);
612 lnet_prepare(lnet_pid_t requested_pid
)
614 /* Prepare to bring up the network */
615 struct lnet_res_container
**recs
;
618 LASSERT (the_lnet
.ln_refcount
== 0);
620 the_lnet
.ln_routing
= 0;
622 LASSERT ((requested_pid
& LNET_PID_USERFLAG
) == 0);
623 the_lnet
.ln_pid
= requested_pid
;
625 INIT_LIST_HEAD(&the_lnet
.ln_test_peers
);
626 INIT_LIST_HEAD(&the_lnet
.ln_nis
);
627 INIT_LIST_HEAD(&the_lnet
.ln_nis_cpt
);
628 INIT_LIST_HEAD(&the_lnet
.ln_nis_zombie
);
629 INIT_LIST_HEAD(&the_lnet
.ln_routers
);
631 rc
= lnet_create_remote_nets_table();
635 the_lnet
.ln_interface_cookie
= lnet_create_interface_cookie();
637 the_lnet
.ln_counters
= cfs_percpt_alloc(lnet_cpt_table(),
638 sizeof(lnet_counters_t
));
639 if (the_lnet
.ln_counters
== NULL
) {
640 CERROR("Failed to allocate counters for LNet\n");
645 rc
= lnet_peer_tables_create();
649 rc
= lnet_msg_containers_create();
653 rc
= lnet_res_container_setup(&the_lnet
.ln_eq_container
, 0,
654 LNET_COOKIE_TYPE_EQ
, LNET_FL_MAX_EQS
,
659 recs
= lnet_res_containers_create(LNET_COOKIE_TYPE_ME
, LNET_FL_MAX_MES
,
664 the_lnet
.ln_me_containers
= recs
;
666 recs
= lnet_res_containers_create(LNET_COOKIE_TYPE_MD
, LNET_FL_MAX_MDS
,
667 sizeof(lnet_libmd_t
));
671 the_lnet
.ln_md_containers
= recs
;
673 rc
= lnet_portals_create();
675 CERROR("Failed to create portals for LNet: %d\n", rc
);
687 lnet_unprepare (void)
689 /* NB no LNET_LOCK since this is the last reference. All LND instances
690 * have shut down already, so it is safe to unlink and free all
691 * descriptors, even those that appear committed to a network op (eg MD
692 * with non-zero pending count) */
694 lnet_fail_nid(LNET_NID_ANY
, 0);
696 LASSERT(the_lnet
.ln_refcount
== 0);
697 LASSERT(list_empty(&the_lnet
.ln_test_peers
));
698 LASSERT(list_empty(&the_lnet
.ln_nis
));
699 LASSERT(list_empty(&the_lnet
.ln_nis_cpt
));
700 LASSERT(list_empty(&the_lnet
.ln_nis_zombie
));
702 lnet_portals_destroy();
704 if (the_lnet
.ln_md_containers
!= NULL
) {
705 lnet_res_containers_destroy(the_lnet
.ln_md_containers
);
706 the_lnet
.ln_md_containers
= NULL
;
709 if (the_lnet
.ln_me_containers
!= NULL
) {
710 lnet_res_containers_destroy(the_lnet
.ln_me_containers
);
711 the_lnet
.ln_me_containers
= NULL
;
714 lnet_res_container_cleanup(&the_lnet
.ln_eq_container
);
716 lnet_msg_containers_destroy();
717 lnet_peer_tables_destroy();
718 lnet_rtrpools_free();
720 if (the_lnet
.ln_counters
!= NULL
) {
721 cfs_percpt_free(the_lnet
.ln_counters
);
722 the_lnet
.ln_counters
= NULL
;
724 lnet_destroy_remote_nets_table();
730 lnet_net2ni_locked(__u32 net
, int cpt
)
732 struct list_head
*tmp
;
735 LASSERT(cpt
!= LNET_LOCK_EX
);
737 list_for_each(tmp
, &the_lnet
.ln_nis
) {
738 ni
= list_entry(tmp
, lnet_ni_t
, ni_list
);
740 if (LNET_NIDNET(ni
->ni_nid
) == net
) {
741 lnet_ni_addref_locked(ni
, cpt
);
750 lnet_net2ni(__u32 net
)
755 ni
= lnet_net2ni_locked(net
, 0);
760 EXPORT_SYMBOL(lnet_net2ni
);
763 lnet_nid_cpt_hash(lnet_nid_t nid
, unsigned int number
)
768 LASSERT(number
>= 1 && number
<= LNET_CPT_NUMBER
);
773 val
= hash_long(key
, LNET_CPT_BITS
);
774 /* NB: LNET_CP_NUMBER doesn't have to be PO2 */
778 return (unsigned int)(key
+ val
+ (val
>> 1)) % number
;
782 lnet_cpt_of_nid_locked(lnet_nid_t nid
)
786 /* must called with hold of lnet_net_lock */
787 if (LNET_CPT_NUMBER
== 1)
788 return 0; /* the only one */
790 /* take lnet_net_lock(any) would be OK */
791 if (!list_empty(&the_lnet
.ln_nis_cpt
)) {
792 list_for_each_entry(ni
, &the_lnet
.ln_nis_cpt
, ni_cptlist
) {
793 if (LNET_NIDNET(ni
->ni_nid
) != LNET_NIDNET(nid
))
796 LASSERT(ni
->ni_cpts
!= NULL
);
797 return ni
->ni_cpts
[lnet_nid_cpt_hash
798 (nid
, ni
->ni_ncpts
)];
802 return lnet_nid_cpt_hash(nid
, LNET_CPT_NUMBER
);
806 lnet_cpt_of_nid(lnet_nid_t nid
)
811 if (LNET_CPT_NUMBER
== 1)
812 return 0; /* the only one */
814 if (list_empty(&the_lnet
.ln_nis_cpt
))
815 return lnet_nid_cpt_hash(nid
, LNET_CPT_NUMBER
);
817 cpt
= lnet_net_lock_current();
818 cpt2
= lnet_cpt_of_nid_locked(nid
);
819 lnet_net_unlock(cpt
);
823 EXPORT_SYMBOL(lnet_cpt_of_nid
);
826 lnet_islocalnet(__u32 net
)
831 cpt
= lnet_net_lock_current();
833 ni
= lnet_net2ni_locked(net
, cpt
);
835 lnet_ni_decref_locked(ni
, cpt
);
837 lnet_net_unlock(cpt
);
843 lnet_nid2ni_locked(lnet_nid_t nid
, int cpt
)
846 struct list_head
*tmp
;
848 LASSERT(cpt
!= LNET_LOCK_EX
);
850 list_for_each(tmp
, &the_lnet
.ln_nis
) {
851 ni
= list_entry(tmp
, lnet_ni_t
, ni_list
);
853 if (ni
->ni_nid
== nid
) {
854 lnet_ni_addref_locked(ni
, cpt
);
863 lnet_islocalnid(lnet_nid_t nid
)
868 cpt
= lnet_net_lock_current();
869 ni
= lnet_nid2ni_locked(nid
, cpt
);
871 lnet_ni_decref_locked(ni
, cpt
);
872 lnet_net_unlock(cpt
);
878 lnet_count_acceptor_nis (void)
880 /* Return the # of NIs that need the acceptor. */
882 struct list_head
*tmp
;
886 cpt
= lnet_net_lock_current();
887 list_for_each(tmp
, &the_lnet
.ln_nis
) {
888 ni
= list_entry(tmp
, lnet_ni_t
, ni_list
);
890 if (ni
->ni_lnd
->lnd_accept
!= NULL
)
894 lnet_net_unlock(cpt
);
900 lnet_ni_tq_credits(lnet_ni_t
*ni
)
904 LASSERT(ni
->ni_ncpts
>= 1);
906 if (ni
->ni_ncpts
== 1)
907 return ni
->ni_maxtxcredits
;
909 credits
= ni
->ni_maxtxcredits
/ ni
->ni_ncpts
;
910 credits
= max(credits
, 8 * ni
->ni_peertxcredits
);
911 credits
= min(credits
, ni
->ni_maxtxcredits
);
917 lnet_shutdown_lndnis (void)
923 /* NB called holding the global mutex */
925 /* All quiet on the API front */
926 LASSERT(!the_lnet
.ln_shutdown
);
927 LASSERT(the_lnet
.ln_refcount
== 0);
928 LASSERT(list_empty(&the_lnet
.ln_nis_zombie
));
930 lnet_net_lock(LNET_LOCK_EX
);
931 the_lnet
.ln_shutdown
= 1; /* flag shutdown */
933 /* Unlink NIs from the global table */
934 while (!list_empty(&the_lnet
.ln_nis
)) {
935 ni
= list_entry(the_lnet
.ln_nis
.next
,
937 /* move it to zombie list and nobody can find it anymore */
938 list_move(&ni
->ni_list
, &the_lnet
.ln_nis_zombie
);
939 lnet_ni_decref_locked(ni
, 0); /* drop ln_nis' ref */
941 if (!list_empty(&ni
->ni_cptlist
)) {
942 list_del_init(&ni
->ni_cptlist
);
943 lnet_ni_decref_locked(ni
, 0);
947 /* Drop the cached eqwait NI. */
948 if (the_lnet
.ln_eq_waitni
!= NULL
) {
949 lnet_ni_decref_locked(the_lnet
.ln_eq_waitni
, 0);
950 the_lnet
.ln_eq_waitni
= NULL
;
953 /* Drop the cached loopback NI. */
954 if (the_lnet
.ln_loni
!= NULL
) {
955 lnet_ni_decref_locked(the_lnet
.ln_loni
, 0);
956 the_lnet
.ln_loni
= NULL
;
959 lnet_net_unlock(LNET_LOCK_EX
);
961 /* Clear lazy portals and drop delayed messages which hold refs
962 * on their lnet_msg_t::msg_rxpeer */
963 for (i
= 0; i
< the_lnet
.ln_nportals
; i
++)
964 LNetClearLazyPortal(i
);
966 /* Clear the peer table and wait for all peers to go (they hold refs on
968 lnet_peer_tables_cleanup();
970 lnet_net_lock(LNET_LOCK_EX
);
971 /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
972 * and shut them down in guaranteed thread context */
974 while (!list_empty(&the_lnet
.ln_nis_zombie
)) {
978 ni
= list_entry(the_lnet
.ln_nis_zombie
.next
,
980 list_del_init(&ni
->ni_list
);
981 cfs_percpt_for_each(ref
, j
, ni
->ni_refs
) {
984 /* still busy, add it back to zombie list */
985 list_add(&ni
->ni_list
, &the_lnet
.ln_nis_zombie
);
989 if (!list_empty(&ni
->ni_list
)) {
990 lnet_net_unlock(LNET_LOCK_EX
);
992 if ((i
& (-i
)) == i
) {
993 CDEBUG(D_WARNING
, "Waiting for zombie LNI %s\n",
994 libcfs_nid2str(ni
->ni_nid
));
996 set_current_state(TASK_UNINTERRUPTIBLE
);
997 schedule_timeout(cfs_time_seconds(1));
998 lnet_net_lock(LNET_LOCK_EX
);
1002 ni
->ni_lnd
->lnd_refcount
--;
1003 lnet_net_unlock(LNET_LOCK_EX
);
1005 islo
= ni
->ni_lnd
->lnd_type
== LOLND
;
1007 LASSERT (!in_interrupt ());
1008 (ni
->ni_lnd
->lnd_shutdown
)(ni
);
1010 /* can't deref lnd anymore now; it might have unregistered
1014 CDEBUG(D_LNI
, "Removed LNI %s\n",
1015 libcfs_nid2str(ni
->ni_nid
));
1020 lnet_net_lock(LNET_LOCK_EX
);
1023 the_lnet
.ln_shutdown
= 0;
1024 lnet_net_unlock(LNET_LOCK_EX
);
1026 if (the_lnet
.ln_network_tokens
!= NULL
) {
1027 LIBCFS_FREE(the_lnet
.ln_network_tokens
,
1028 the_lnet
.ln_network_tokens_nob
);
1029 the_lnet
.ln_network_tokens
= NULL
;
1034 lnet_startup_lndnis (void)
1038 struct lnet_tx_queue
*tq
;
1039 struct list_head nilist
;
1044 char *nets
= lnet_get_networks();
1046 INIT_LIST_HEAD(&nilist
);
1051 rc
= lnet_parse_networks(&nilist
, nets
);
1055 while (!list_empty(&nilist
)) {
1056 ni
= list_entry(nilist
.next
, lnet_ni_t
, ni_list
);
1057 lnd_type
= LNET_NETTYP(LNET_NIDNET(ni
->ni_nid
));
1059 LASSERT (libcfs_isknown_lnd(lnd_type
));
1061 if (lnd_type
== CIBLND
||
1062 lnd_type
== OPENIBLND
||
1063 lnd_type
== IIBLND
||
1064 lnd_type
== VIBLND
) {
1065 CERROR("LND %s obsoleted\n",
1066 libcfs_lnd2str(lnd_type
));
1070 LNET_MUTEX_LOCK(&the_lnet
.ln_lnd_mutex
);
1071 lnd
= lnet_find_lnd_by_type(lnd_type
);
1074 LNET_MUTEX_UNLOCK(&the_lnet
.ln_lnd_mutex
);
1075 rc
= request_module("%s",
1076 libcfs_lnd2modname(lnd_type
));
1077 LNET_MUTEX_LOCK(&the_lnet
.ln_lnd_mutex
);
1079 lnd
= lnet_find_lnd_by_type(lnd_type
);
1081 LNET_MUTEX_UNLOCK(&the_lnet
.ln_lnd_mutex
);
1082 CERROR("Can't load LND %s, module %s, rc=%d\n",
1083 libcfs_lnd2str(lnd_type
),
1084 libcfs_lnd2modname(lnd_type
), rc
);
1089 lnet_net_lock(LNET_LOCK_EX
);
1090 lnd
->lnd_refcount
++;
1091 lnet_net_unlock(LNET_LOCK_EX
);
1095 rc
= (lnd
->lnd_startup
)(ni
);
1097 LNET_MUTEX_UNLOCK(&the_lnet
.ln_lnd_mutex
);
1100 LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
1102 rc
, libcfs_lnd2str(lnd
->lnd_type
));
1103 lnet_net_lock(LNET_LOCK_EX
);
1104 lnd
->lnd_refcount
--;
1105 lnet_net_unlock(LNET_LOCK_EX
);
1109 LASSERT (ni
->ni_peertimeout
<= 0 || lnd
->lnd_query
!= NULL
);
1111 list_del(&ni
->ni_list
);
1113 lnet_net_lock(LNET_LOCK_EX
);
1114 /* refcount for ln_nis */
1115 lnet_ni_addref_locked(ni
, 0);
1116 list_add_tail(&ni
->ni_list
, &the_lnet
.ln_nis
);
1117 if (ni
->ni_cpts
!= NULL
) {
1118 list_add_tail(&ni
->ni_cptlist
,
1119 &the_lnet
.ln_nis_cpt
);
1120 lnet_ni_addref_locked(ni
, 0);
1123 lnet_net_unlock(LNET_LOCK_EX
);
1125 if (lnd
->lnd_type
== LOLND
) {
1127 LASSERT (the_lnet
.ln_loni
== NULL
);
1128 the_lnet
.ln_loni
= ni
;
1132 if (ni
->ni_peertxcredits
== 0 ||
1133 ni
->ni_maxtxcredits
== 0) {
1134 LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
1135 libcfs_lnd2str(lnd
->lnd_type
),
1136 ni
->ni_peertxcredits
== 0 ?
1141 cfs_percpt_for_each(tq
, i
, ni
->ni_tx_queues
) {
1142 tq
->tq_credits_min
=
1143 tq
->tq_credits_max
=
1144 tq
->tq_credits
= lnet_ni_tq_credits(ni
);
1147 CDEBUG(D_LNI
, "Added LNI %s [%d/%d/%d/%d]\n",
1148 libcfs_nid2str(ni
->ni_nid
), ni
->ni_peertxcredits
,
1149 lnet_ni_tq_credits(ni
) * LNET_CPT_NUMBER
,
1150 ni
->ni_peerrtrcredits
, ni
->ni_peertimeout
);
1155 if (the_lnet
.ln_eq_waitni
!= NULL
&& nicount
> 1) {
1156 lnd_type
= the_lnet
.ln_eq_waitni
->ni_lnd
->lnd_type
;
1157 LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
1159 libcfs_lnd2str(lnd_type
));
1166 lnet_shutdown_lndnis();
1168 while (!list_empty(&nilist
)) {
1169 ni
= list_entry(nilist
.next
, lnet_ni_t
, ni_list
);
1170 list_del(&ni
->ni_list
);
1178 * Initialize LNet library.
1180 * Only userspace program needs to call this function - it's automatically
1181 * called in the kernel at module loading time. Caller has to call LNetFini()
1182 * after a call to LNetInit(), if and only if the latter returned 0. It must
1183 * be called exactly once.
1185 * \return 0 on success, and -ve on failures.
1192 lnet_assert_wire_constants();
1193 LASSERT(!the_lnet
.ln_init
);
1195 memset(&the_lnet
, 0, sizeof(the_lnet
));
1197 /* refer to global cfs_cpt_table for now */
1198 the_lnet
.ln_cpt_table
= cfs_cpt_table
;
1199 the_lnet
.ln_cpt_number
= cfs_cpt_number(cfs_cpt_table
);
1201 LASSERT(the_lnet
.ln_cpt_number
> 0);
1202 if (the_lnet
.ln_cpt_number
> LNET_CPT_MAX
) {
1203 /* we are under risk of consuming all lh_cookie */
1204 CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
1205 "please change setting of CPT-table and retry\n",
1206 the_lnet
.ln_cpt_number
, LNET_CPT_MAX
);
1210 while ((1 << the_lnet
.ln_cpt_bits
) < the_lnet
.ln_cpt_number
)
1211 the_lnet
.ln_cpt_bits
++;
1213 rc
= lnet_create_locks();
1215 CERROR("Can't create LNet global locks: %d\n", rc
);
1219 the_lnet
.ln_refcount
= 0;
1220 the_lnet
.ln_init
= 1;
1221 LNetInvalidateHandle(&the_lnet
.ln_rc_eqh
);
1222 INIT_LIST_HEAD(&the_lnet
.ln_lnds
);
1223 INIT_LIST_HEAD(&the_lnet
.ln_rcd_zombie
);
1224 INIT_LIST_HEAD(&the_lnet
.ln_rcd_deathrow
);
1226 /* The hash table size is the number of bits it takes to express the set
1227 * ln_num_routes, minus 1 (better to under estimate than over so we
1228 * don't waste memory). */
1229 if (rnet_htable_size
<= 0)
1230 rnet_htable_size
= LNET_REMOTE_NETS_HASH_DEFAULT
;
1231 else if (rnet_htable_size
> LNET_REMOTE_NETS_HASH_MAX
)
1232 rnet_htable_size
= LNET_REMOTE_NETS_HASH_MAX
;
1233 the_lnet
.ln_remote_nets_hbits
= max_t(int, 1,
1234 order_base_2(rnet_htable_size
) - 1);
1236 /* All LNDs apart from the LOLND are in separate modules. They
1237 * register themselves when their module loads, and unregister
1238 * themselves when their module is unloaded. */
1239 lnet_register_lnd(&the_lolnd
);
1242 EXPORT_SYMBOL(LNetInit
);
1245 * Finalize LNet library.
1247 * Only userspace program needs to call this function. It can be called
1250 * \pre LNetInit() called with success.
1251 * \pre All LNet users called LNetNIFini() for matching LNetNIInit() calls.
1256 LASSERT(the_lnet
.ln_init
);
1257 LASSERT(the_lnet
.ln_refcount
== 0);
1259 while (!list_empty(&the_lnet
.ln_lnds
))
1260 lnet_unregister_lnd(list_entry(the_lnet
.ln_lnds
.next
,
1262 lnet_destroy_locks();
1264 the_lnet
.ln_init
= 0;
1266 EXPORT_SYMBOL(LNetFini
);
1269 * Set LNet PID and start LNet interfaces, routing, and forwarding.
1271 * Userspace program should call this after a successful call to LNetInit().
1272 * Users must call this function at least once before any other functions.
1273 * For each successful call there must be a corresponding call to
1274 * LNetNIFini(). For subsequent calls to LNetNIInit(), \a requested_pid is
1277 * The PID used by LNet may be different from the one requested.
1280 * \param requested_pid PID requested by the caller.
1282 * \return >= 0 on success, and < 0 error code on failures.
1285 LNetNIInit(lnet_pid_t requested_pid
)
1287 int im_a_router
= 0;
1290 LNET_MUTEX_LOCK(&the_lnet
.ln_api_mutex
);
1292 LASSERT (the_lnet
.ln_init
);
1293 CDEBUG(D_OTHER
, "refs %d\n", the_lnet
.ln_refcount
);
1295 if (the_lnet
.ln_refcount
> 0) {
1296 rc
= the_lnet
.ln_refcount
++;
1300 lnet_get_tunables();
1302 if (requested_pid
== LNET_PID_ANY
) {
1303 /* Don't instantiate LNET just for me */
1308 rc
= lnet_prepare(requested_pid
);
1312 rc
= lnet_startup_lndnis();
1316 rc
= lnet_parse_routes(lnet_get_routes(), &im_a_router
);
1320 rc
= lnet_check_routes();
1324 rc
= lnet_rtrpools_alloc(im_a_router
);
1328 rc
= lnet_acceptor_start();
1332 the_lnet
.ln_refcount
= 1;
1333 /* Now I may use my own API functions... */
1335 /* NB router checker needs the_lnet.ln_ping_info in
1336 * lnet_router_checker -> lnet_update_ni_status_locked */
1337 rc
= lnet_ping_target_init();
1341 rc
= lnet_router_checker_start();
1349 lnet_ping_target_fini();
1351 the_lnet
.ln_refcount
= 0;
1352 lnet_acceptor_stop();
1354 lnet_destroy_routes();
1355 lnet_shutdown_lndnis();
1361 LNET_MUTEX_UNLOCK(&the_lnet
.ln_api_mutex
);
1364 EXPORT_SYMBOL(LNetNIInit
);
1367 * Stop LNet interfaces, routing, and forwarding.
1369 * Users must call this function once for each successful call to LNetNIInit().
1370 * Once the LNetNIFini() operation has been started, the results of pending
1371 * API operations are undefined.
1373 * \return always 0 for current implementation.
1378 LNET_MUTEX_LOCK(&the_lnet
.ln_api_mutex
);
1380 LASSERT (the_lnet
.ln_init
);
1381 LASSERT (the_lnet
.ln_refcount
> 0);
1383 if (the_lnet
.ln_refcount
!= 1) {
1384 the_lnet
.ln_refcount
--;
1386 LASSERT (!the_lnet
.ln_niinit_self
);
1389 lnet_router_checker_stop();
1390 lnet_ping_target_fini();
1392 /* Teardown fns that use my own API functions BEFORE here */
1393 the_lnet
.ln_refcount
= 0;
1395 lnet_acceptor_stop();
1396 lnet_destroy_routes();
1397 lnet_shutdown_lndnis();
1401 LNET_MUTEX_UNLOCK(&the_lnet
.ln_api_mutex
);
1404 EXPORT_SYMBOL(LNetNIFini
);
1407 * This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
1408 * IOC_LIBCFS_PORTALS_COMPATIBILITY commands to users, by tweaking the LNet
1409 * internal ioctl handler.
1411 * IOC_LIBCFS_PORTALS_COMPATIBILITY is now deprecated, don't use it.
1413 * \param cmd IOC_LIBCFS_DEBUG_PEER to print debugging data about a peer.
1414 * The data will be printed to system console. Don't use it excessively.
1415 * \param arg A pointer to lnet_process_id_t, process ID of the peer.
1417 * \return Always return 0 when called by users directly (i.e., not via ioctl).
1420 LNetCtl(unsigned int cmd
, void *arg
)
1422 struct libcfs_ioctl_data
*data
= arg
;
1423 lnet_process_id_t id
= {0};
1427 LASSERT (the_lnet
.ln_init
);
1428 LASSERT (the_lnet
.ln_refcount
> 0);
1431 case IOC_LIBCFS_GET_NI
:
1432 rc
= LNetGetId(data
->ioc_count
, &id
);
1433 data
->ioc_nid
= id
.nid
;
1436 case IOC_LIBCFS_FAIL_NID
:
1437 return lnet_fail_nid(data
->ioc_nid
, data
->ioc_count
);
1439 case IOC_LIBCFS_ADD_ROUTE
:
1440 rc
= lnet_add_route(data
->ioc_net
, data
->ioc_count
,
1441 data
->ioc_nid
, data
->ioc_priority
);
1442 return (rc
!= 0) ? rc
: lnet_check_routes();
1444 case IOC_LIBCFS_DEL_ROUTE
:
1445 return lnet_del_route(data
->ioc_net
, data
->ioc_nid
);
1447 case IOC_LIBCFS_GET_ROUTE
:
1448 return lnet_get_route(data
->ioc_count
,
1449 &data
->ioc_net
, &data
->ioc_count
,
1450 &data
->ioc_nid
, &data
->ioc_flags
,
1451 &data
->ioc_priority
);
1452 case IOC_LIBCFS_NOTIFY_ROUTER
:
1453 return lnet_notify(NULL
, data
->ioc_nid
, data
->ioc_flags
,
1454 cfs_time_current() -
1455 cfs_time_seconds(cfs_time_current_sec() -
1456 (time_t)data
->ioc_u64
[0]));
1458 case IOC_LIBCFS_PORTALS_COMPATIBILITY
:
1459 /* This can be removed once lustre stops calling it */
1462 case IOC_LIBCFS_LNET_DIST
:
1463 rc
= LNetDist(data
->ioc_nid
, &data
->ioc_nid
, &data
->ioc_u32
[1]);
1464 if (rc
< 0 && rc
!= -EHOSTUNREACH
)
1467 data
->ioc_u32
[0] = rc
;
1470 case IOC_LIBCFS_TESTPROTOCOMPAT
:
1471 lnet_net_lock(LNET_LOCK_EX
);
1472 the_lnet
.ln_testprotocompat
= data
->ioc_flags
;
1473 lnet_net_unlock(LNET_LOCK_EX
);
1476 case IOC_LIBCFS_PING
:
1477 id
.nid
= data
->ioc_nid
;
1478 id
.pid
= data
->ioc_u32
[0];
1479 rc
= lnet_ping(id
, data
->ioc_u32
[1], /* timeout */
1480 (lnet_process_id_t
*)data
->ioc_pbuf1
,
1481 data
->ioc_plen1
/sizeof(lnet_process_id_t
));
1484 data
->ioc_count
= rc
;
1487 case IOC_LIBCFS_DEBUG_PEER
: {
1488 /* CAVEAT EMPTOR: this one designed for calling directly; not
1490 id
= *((lnet_process_id_t
*) arg
);
1492 lnet_debug_peer(id
.nid
);
1494 ni
= lnet_net2ni(LNET_NIDNET(id
.nid
));
1496 CDEBUG(D_WARNING
, "No NI for %s\n", libcfs_id2str(id
));
1498 if (ni
->ni_lnd
->lnd_ctl
== NULL
) {
1499 CDEBUG(D_WARNING
, "No ctl for %s\n",
1502 (void)ni
->ni_lnd
->lnd_ctl(ni
, cmd
, arg
);
1511 ni
= lnet_net2ni(data
->ioc_net
);
1515 if (ni
->ni_lnd
->lnd_ctl
== NULL
)
1518 rc
= ni
->ni_lnd
->lnd_ctl(ni
, cmd
, arg
);
1525 EXPORT_SYMBOL(LNetCtl
);
1528 * Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
1529 * all interfaces share a same PID, as requested by LNetNIInit().
1531 * \param index Index of the interface to look up.
1532 * \param id On successful return, this location will hold the
1533 * lnet_process_id_t ID of the interface.
1535 * \retval 0 If an interface exists at \a index.
1536 * \retval -ENOENT If no interface has been found.
1539 LNetGetId(unsigned int index
, lnet_process_id_t
*id
)
1542 struct list_head
*tmp
;
1546 LASSERT(the_lnet
.ln_init
);
1548 /* LNetNI initilization failed? */
1549 if (the_lnet
.ln_refcount
== 0)
1552 cpt
= lnet_net_lock_current();
1554 list_for_each(tmp
, &the_lnet
.ln_nis
) {
1558 ni
= list_entry(tmp
, lnet_ni_t
, ni_list
);
1560 id
->nid
= ni
->ni_nid
;
1561 id
->pid
= the_lnet
.ln_pid
;
1566 lnet_net_unlock(cpt
);
1569 EXPORT_SYMBOL(LNetGetId
);
1572 * Print a string representation of handle \a h into buffer \a str of
1576 LNetSnprintHandle(char *str
, int len
, lnet_handle_any_t h
)
1578 snprintf(str
, len
, LPX64
, h
.cookie
);
1580 EXPORT_SYMBOL(LNetSnprintHandle
);
1583 lnet_create_ping_info(void)
1588 unsigned int infosz
;
1590 lnet_process_id_t id
;
1591 lnet_ping_info_t
*pinfo
;
1593 for (n
= 0; ; n
++) {
1594 rc
= LNetGetId(n
, &id
);
1601 infosz
= offsetof(lnet_ping_info_t
, pi_ni
[n
]);
1602 LIBCFS_ALLOC(pinfo
, infosz
);
1603 if (pinfo
== NULL
) {
1604 CERROR("Can't allocate ping info[%d]\n", n
);
1609 pinfo
->pi_pid
= the_lnet
.ln_pid
;
1610 pinfo
->pi_magic
= LNET_PROTO_PING_MAGIC
;
1611 pinfo
->pi_features
= LNET_PING_FEAT_NI_STATUS
;
1613 for (i
= 0; i
< n
; i
++) {
1614 lnet_ni_status_t
*ns
= &pinfo
->pi_ni
[i
];
1616 rc
= LNetGetId(i
, &id
);
1619 ns
->ns_nid
= id
.nid
;
1620 ns
->ns_status
= LNET_NI_STATUS_UP
;
1624 ni
= lnet_nid2ni_locked(id
.nid
, 0);
1625 LASSERT(ni
!= NULL
);
1628 LASSERT(ni
->ni_status
== NULL
);
1632 lnet_ni_decref_locked(ni
, 0);
1636 the_lnet
.ln_ping_info
= pinfo
;
1641 lnet_destroy_ping_info(void)
1647 list_for_each_entry(ni
, &the_lnet
.ln_nis
, ni_list
) {
1649 ni
->ni_status
= NULL
;
1655 LIBCFS_FREE(the_lnet
.ln_ping_info
,
1656 offsetof(lnet_ping_info_t
,
1657 pi_ni
[the_lnet
.ln_ping_info
->pi_nnis
]));
1658 the_lnet
.ln_ping_info
= NULL
;
1663 lnet_ping_target_init(void)
1666 lnet_handle_me_t meh
;
1667 lnet_process_id_t id
;
1672 rc
= lnet_create_ping_info();
1676 /* We can have a tiny EQ since we only need to see the unlink event on
1677 * teardown, which by definition is the last one! */
1678 rc
= LNetEQAlloc(2, LNET_EQ_HANDLER_NONE
, &the_lnet
.ln_ping_target_eq
);
1680 CERROR("Can't allocate ping EQ: %d\n", rc
);
1684 memset(&id
, 0, sizeof(lnet_process_id_t
));
1685 id
.nid
= LNET_NID_ANY
;
1686 id
.pid
= LNET_PID_ANY
;
1688 rc
= LNetMEAttach(LNET_RESERVED_PORTAL
, id
,
1689 LNET_PROTO_PING_MATCHBITS
, 0,
1690 LNET_UNLINK
, LNET_INS_AFTER
,
1693 CERROR("Can't create ping ME: %d\n", rc
);
1697 /* initialize md content */
1698 infosz
= offsetof(lnet_ping_info_t
,
1699 pi_ni
[the_lnet
.ln_ping_info
->pi_nnis
]);
1700 md
.start
= the_lnet
.ln_ping_info
;
1702 md
.threshold
= LNET_MD_THRESH_INF
;
1704 md
.options
= LNET_MD_OP_GET
| LNET_MD_TRUNCATE
|
1705 LNET_MD_MANAGE_REMOTE
;
1707 md
.eq_handle
= the_lnet
.ln_ping_target_eq
;
1709 rc
= LNetMDAttach(meh
, md
,
1711 &the_lnet
.ln_ping_target_md
);
1713 CERROR("Can't attach ping MD: %d\n", rc
);
1720 rc2
= LNetMEUnlink(meh
);
1723 rc2
= LNetEQFree(the_lnet
.ln_ping_target_eq
);
1726 lnet_destroy_ping_info();
1731 lnet_ping_target_fini(void)
1736 int timeout_ms
= 1000;
1737 sigset_t blocked
= cfs_block_allsigs();
1739 LNetMDUnlink(the_lnet
.ln_ping_target_md
);
1740 /* NB md could be busy; this just starts the unlink */
1743 rc
= LNetEQPoll(&the_lnet
.ln_ping_target_eq
, 1,
1744 timeout_ms
, &event
, &which
);
1746 /* I expect overflow... */
1747 LASSERT (rc
>= 0 || rc
== -EOVERFLOW
);
1750 /* timed out: provide a diagnostic */
1751 CWARN("Still waiting for ping MD to unlink\n");
1756 /* Got a valid event */
1761 rc
= LNetEQFree(the_lnet
.ln_ping_target_eq
);
1763 lnet_destroy_ping_info();
1764 cfs_restore_sigs(blocked
);
1768 lnet_ping (lnet_process_id_t id
, int timeout_ms
, lnet_process_id_t
*ids
, int n_ids
)
1770 lnet_handle_eq_t eqh
;
1771 lnet_handle_md_t mdh
;
1777 const int a_long_time
= 60000; /* mS */
1778 int infosz
= offsetof(lnet_ping_info_t
, pi_ni
[n_ids
]);
1779 lnet_ping_info_t
*info
;
1780 lnet_process_id_t tmpid
;
1788 id
.nid
== LNET_NID_ANY
||
1789 timeout_ms
> 500000 || /* arbitrary limit! */
1790 n_ids
> 20) /* arbitrary limit! */
1793 if (id
.pid
== LNET_PID_ANY
)
1794 id
.pid
= LUSTRE_SRV_LNET_PID
;
1796 LIBCFS_ALLOC(info
, infosz
);
1800 /* NB 2 events max (including any unlink event) */
1801 rc
= LNetEQAlloc(2, LNET_EQ_HANDLER_NONE
, &eqh
);
1803 CERROR("Can't allocate EQ: %d\n", rc
);
1807 /* initialize md content */
1810 md
.threshold
= 2; /*GET/REPLY*/
1812 md
.options
= LNET_MD_TRUNCATE
;
1816 rc
= LNetMDBind(md
, LNET_UNLINK
, &mdh
);
1818 CERROR("Can't bind MD: %d\n", rc
);
1822 rc
= LNetGet(LNET_NID_ANY
, mdh
, id
,
1823 LNET_RESERVED_PORTAL
,
1824 LNET_PROTO_PING_MATCHBITS
, 0);
1827 /* Don't CERROR; this could be deliberate! */
1829 rc2
= LNetMDUnlink(mdh
);
1832 /* NB must wait for the UNLINK event below... */
1834 timeout_ms
= a_long_time
;
1838 /* MUST block for unlink to complete */
1840 blocked
= cfs_block_allsigs();
1842 rc2
= LNetEQPoll(&eqh
, 1, timeout_ms
, &event
, &which
);
1845 cfs_restore_sigs(blocked
);
1847 CDEBUG(D_NET
, "poll %d(%d %d)%s\n", rc2
,
1848 (rc2
<= 0) ? -1 : event
.type
,
1849 (rc2
<= 0) ? -1 : event
.status
,
1850 (rc2
> 0 && event
.unlinked
) ? " unlinked" : "");
1852 LASSERT (rc2
!= -EOVERFLOW
); /* can't miss anything */
1854 if (rc2
<= 0 || event
.status
!= 0) {
1855 /* timeout or error */
1856 if (!replied
&& rc
== 0)
1857 rc
= (rc2
< 0) ? rc2
:
1858 (rc2
== 0) ? -ETIMEDOUT
:
1862 /* Ensure completion in finite time... */
1864 /* No assertion (racing with network) */
1866 timeout_ms
= a_long_time
;
1867 } else if (rc2
== 0) {
1868 /* timed out waiting for unlink */
1869 CWARN("ping %s: late network completion\n",
1872 } else if (event
.type
== LNET_EVENT_REPLY
) {
1877 } while (rc2
<= 0 || !event
.unlinked
);
1881 CWARN("%s: Unexpected rc >= 0 but no reply!\n",
1888 LASSERT (nob
>= 0 && nob
<= infosz
);
1890 rc
= -EPROTO
; /* if I can't parse... */
1893 /* can't check magic/version */
1894 CERROR("%s: ping info too short %d\n",
1895 libcfs_id2str(id
), nob
);
1899 if (info
->pi_magic
== __swab32(LNET_PROTO_PING_MAGIC
)) {
1900 lnet_swap_pinginfo(info
);
1901 } else if (info
->pi_magic
!= LNET_PROTO_PING_MAGIC
) {
1902 CERROR("%s: Unexpected magic %08x\n",
1903 libcfs_id2str(id
), info
->pi_magic
);
1907 if ((info
->pi_features
& LNET_PING_FEAT_NI_STATUS
) == 0) {
1908 CERROR("%s: ping w/o NI status: 0x%x\n",
1909 libcfs_id2str(id
), info
->pi_features
);
1913 if (nob
< offsetof(lnet_ping_info_t
, pi_ni
[0])) {
1914 CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id
),
1915 nob
, (int)offsetof(lnet_ping_info_t
, pi_ni
[0]));
1919 if (info
->pi_nnis
< n_ids
)
1920 n_ids
= info
->pi_nnis
;
1922 if (nob
< offsetof(lnet_ping_info_t
, pi_ni
[n_ids
])) {
1923 CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id
),
1924 nob
, (int)offsetof(lnet_ping_info_t
, pi_ni
[n_ids
]));
1928 rc
= -EFAULT
; /* If I SEGV... */
1930 memset(&tmpid
, 0, sizeof(tmpid
));
1931 for (i
= 0; i
< n_ids
; i
++) {
1932 tmpid
.pid
= info
->pi_pid
;
1933 tmpid
.nid
= info
->pi_ni
[i
].ns_nid
;
1934 if (copy_to_user(&ids
[i
], &tmpid
, sizeof(tmpid
)))
1940 rc2
= LNetEQFree(eqh
);
1942 CERROR("rc2 %d\n", rc2
);
1946 LIBCFS_FREE(info
, infosz
);