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[deliverable/linux.git] / drivers / staging / lustre / include / linux / lnet / lib-types.h
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.gnu.org/licenses/gpl-2.0.html
19 *
20 * GPL HEADER END
21 */
22 /*
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Copyright (c) 2012, 2015, Intel Corporation.
27 */
28 /*
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Seagate, Inc.
31 *
32 * lnet/include/lnet/lib-types.h
33 */
34
35 #ifndef __LNET_LIB_TYPES_H__
36 #define __LNET_LIB_TYPES_H__
37
38 #include <linux/kthread.h>
39 #include <linux/uio.h>
40 #include <linux/types.h>
41 #include <net/sock.h>
42
43 #include "types.h"
44
45 /* Max payload size */
46 #define LNET_MAX_PAYLOAD CONFIG_LNET_MAX_PAYLOAD
47 #if (LNET_MAX_PAYLOAD < LNET_MTU)
48 # error "LNET_MAX_PAYLOAD too small - error in configure --with-max-payload-mb"
49 #elif (LNET_MAX_PAYLOAD > (PAGE_SIZE * LNET_MAX_IOV))
50 # error "LNET_MAX_PAYLOAD too large - error in configure --with-max-payload-mb"
51 #endif
52
53 /* forward refs */
54 struct lnet_libmd;
55
56 typedef struct lnet_msg {
57 struct list_head msg_activelist;
58 struct list_head msg_list; /* Q for credits/MD */
59
60 lnet_process_id_t msg_target;
61 /* where is it from, it's only for building event */
62 lnet_nid_t msg_from;
63 __u32 msg_type;
64
65 /* committed for sending */
66 unsigned int msg_tx_committed:1;
67 /* CPT # this message committed for sending */
68 unsigned int msg_tx_cpt:15;
69 /* committed for receiving */
70 unsigned int msg_rx_committed:1;
71 /* CPT # this message committed for receiving */
72 unsigned int msg_rx_cpt:15;
73 /* queued for tx credit */
74 unsigned int msg_tx_delayed:1;
75 /* queued for RX buffer */
76 unsigned int msg_rx_delayed:1;
77 /* ready for pending on RX delay list */
78 unsigned int msg_rx_ready_delay:1;
79
80 unsigned int msg_vmflush:1; /* VM trying to free memory */
81 unsigned int msg_target_is_router:1; /* sending to a router */
82 unsigned int msg_routing:1; /* being forwarded */
83 unsigned int msg_ack:1; /* ack on finalize (PUT) */
84 unsigned int msg_sending:1; /* outgoing message */
85 unsigned int msg_receiving:1; /* being received */
86 unsigned int msg_txcredit:1; /* taken an NI send credit */
87 unsigned int msg_peertxcredit:1; /* taken a peer send credit */
88 unsigned int msg_rtrcredit:1; /* taken a global router credit */
89 unsigned int msg_peerrtrcredit:1; /* taken a peer router credit */
90 unsigned int msg_onactivelist:1; /* on the activelist */
91
92 struct lnet_peer *msg_txpeer; /* peer I'm sending to */
93 struct lnet_peer *msg_rxpeer; /* peer I received from */
94
95 void *msg_private;
96 struct lnet_libmd *msg_md;
97
98 unsigned int msg_len;
99 unsigned int msg_wanted;
100 unsigned int msg_offset;
101 unsigned int msg_niov;
102 struct kvec *msg_iov;
103 lnet_kiov_t *msg_kiov;
104
105 lnet_event_t msg_ev;
106 lnet_hdr_t msg_hdr;
107 } lnet_msg_t;
108
109 typedef struct lnet_libhandle {
110 struct list_head lh_hash_chain;
111 __u64 lh_cookie;
112 } lnet_libhandle_t;
113
114 #define lh_entry(ptr, type, member) \
115 ((type *)((char *)(ptr) - (char *)(&((type *)0)->member)))
116
117 typedef struct lnet_eq {
118 struct list_head eq_list;
119 lnet_libhandle_t eq_lh;
120 lnet_seq_t eq_enq_seq;
121 lnet_seq_t eq_deq_seq;
122 unsigned int eq_size;
123 lnet_eq_handler_t eq_callback;
124 lnet_event_t *eq_events;
125 int **eq_refs; /* percpt refcount for EQ */
126 } lnet_eq_t;
127
128 typedef struct lnet_me {
129 struct list_head me_list;
130 lnet_libhandle_t me_lh;
131 lnet_process_id_t me_match_id;
132 unsigned int me_portal;
133 unsigned int me_pos; /* hash offset in mt_hash */
134 __u64 me_match_bits;
135 __u64 me_ignore_bits;
136 lnet_unlink_t me_unlink;
137 struct lnet_libmd *me_md;
138 } lnet_me_t;
139
140 typedef struct lnet_libmd {
141 struct list_head md_list;
142 lnet_libhandle_t md_lh;
143 lnet_me_t *md_me;
144 char *md_start;
145 unsigned int md_offset;
146 unsigned int md_length;
147 unsigned int md_max_size;
148 int md_threshold;
149 int md_refcount;
150 unsigned int md_options;
151 unsigned int md_flags;
152 void *md_user_ptr;
153 lnet_eq_t *md_eq;
154 unsigned int md_niov; /* # frags */
155 union {
156 struct kvec iov[LNET_MAX_IOV];
157 lnet_kiov_t kiov[LNET_MAX_IOV];
158 } md_iov;
159 } lnet_libmd_t;
160
161 #define LNET_MD_FLAG_ZOMBIE (1 << 0)
162 #define LNET_MD_FLAG_AUTO_UNLINK (1 << 1)
163 #define LNET_MD_FLAG_ABORTED (1 << 2)
164
165 typedef struct {
166 /* info about peers we are trying to fail */
167 struct list_head tp_list; /* ln_test_peers */
168 lnet_nid_t tp_nid; /* matching nid */
169 unsigned int tp_threshold; /* # failures to simulate */
170 } lnet_test_peer_t;
171
172 #define LNET_COOKIE_TYPE_MD 1
173 #define LNET_COOKIE_TYPE_ME 2
174 #define LNET_COOKIE_TYPE_EQ 3
175 #define LNET_COOKIE_TYPE_BITS 2
176 #define LNET_COOKIE_MASK ((1ULL << LNET_COOKIE_TYPE_BITS) - 1ULL)
177
178 struct lnet_ni; /* forward ref */
179
180 typedef struct lnet_lnd {
181 /* fields managed by portals */
182 struct list_head lnd_list; /* stash in the LND table */
183 int lnd_refcount; /* # active instances */
184
185 /* fields initialised by the LND */
186 __u32 lnd_type;
187
188 int (*lnd_startup)(struct lnet_ni *ni);
189 void (*lnd_shutdown)(struct lnet_ni *ni);
190 int (*lnd_ctl)(struct lnet_ni *ni, unsigned int cmd, void *arg);
191
192 /*
193 * In data movement APIs below, payload buffers are described as a set
194 * of 'niov' fragments which are...
195 * EITHER
196 * in virtual memory (struct iovec *iov != NULL)
197 * OR
198 * in pages (kernel only: plt_kiov_t *kiov != NULL).
199 * The LND may NOT overwrite these fragment descriptors.
200 * An 'offset' and may specify a byte offset within the set of
201 * fragments to start from
202 */
203
204 /*
205 * Start sending a preformatted message. 'private' is NULL for PUT and
206 * GET messages; otherwise this is a response to an incoming message
207 * and 'private' is the 'private' passed to lnet_parse(). Return
208 * non-zero for immediate failure, otherwise complete later with
209 * lnet_finalize()
210 */
211 int (*lnd_send)(struct lnet_ni *ni, void *private, lnet_msg_t *msg);
212
213 /*
214 * Start receiving 'mlen' bytes of payload data, skipping the following
215 * 'rlen' - 'mlen' bytes. 'private' is the 'private' passed to
216 * lnet_parse(). Return non-zero for immediate failure, otherwise
217 * complete later with lnet_finalize(). This also gives back a receive
218 * credit if the LND does flow control.
219 */
220 int (*lnd_recv)(struct lnet_ni *ni, void *private, lnet_msg_t *msg,
221 int delayed, unsigned int niov,
222 struct kvec *iov, lnet_kiov_t *kiov,
223 unsigned int offset, unsigned int mlen,
224 unsigned int rlen);
225
226 /*
227 * lnet_parse() has had to delay processing of this message
228 * (e.g. waiting for a forwarding buffer or send credits). Give the
229 * LND a chance to free urgently needed resources. If called, return 0
230 * for success and do NOT give back a receive credit; that has to wait
231 * until lnd_recv() gets called. On failure return < 0 and
232 * release resources; lnd_recv() will not be called.
233 */
234 int (*lnd_eager_recv)(struct lnet_ni *ni, void *private,
235 lnet_msg_t *msg, void **new_privatep);
236
237 /* notification of peer health */
238 void (*lnd_notify)(struct lnet_ni *ni, lnet_nid_t peer, int alive);
239
240 /* query of peer aliveness */
241 void (*lnd_query)(struct lnet_ni *ni, lnet_nid_t peer,
242 unsigned long *when);
243
244 /* accept a new connection */
245 int (*lnd_accept)(struct lnet_ni *ni, struct socket *sock);
246 } lnd_t;
247
248 struct lnet_tx_queue {
249 int tq_credits; /* # tx credits free */
250 int tq_credits_min; /* lowest it's been */
251 int tq_credits_max; /* total # tx credits */
252 struct list_head tq_delayed; /* delayed TXs */
253 };
254
255 typedef struct lnet_ni {
256 spinlock_t ni_lock;
257 struct list_head ni_list; /* chain on ln_nis */
258 struct list_head ni_cptlist; /* chain on ln_nis_cpt */
259 int ni_maxtxcredits; /* # tx credits */
260 /* # per-peer send credits */
261 int ni_peertxcredits;
262 /* # per-peer router buffer credits */
263 int ni_peerrtrcredits;
264 /* seconds to consider peer dead */
265 int ni_peertimeout;
266 int ni_ncpts; /* number of CPTs */
267 __u32 *ni_cpts; /* bond NI on some CPTs */
268 lnet_nid_t ni_nid; /* interface's NID */
269 void *ni_data; /* instance-specific data */
270 lnd_t *ni_lnd; /* procedural interface */
271 struct lnet_tx_queue **ni_tx_queues; /* percpt TX queues */
272 int **ni_refs; /* percpt reference count */
273 time64_t ni_last_alive;/* when I was last alive */
274 lnet_ni_status_t *ni_status; /* my health status */
275 /* equivalent interfaces to use */
276 char *ni_interfaces[LNET_MAX_INTERFACES];
277 } lnet_ni_t;
278
279 #define LNET_PROTO_PING_MATCHBITS 0x8000000000000000LL
280
281 /*
282 * NB: value of these features equal to LNET_PROTO_PING_VERSION_x
283 * of old LNet, so there shouldn't be any compatibility issue
284 */
285 #define LNET_PING_FEAT_INVAL (0) /* no feature */
286 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
287 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
288 #define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
289
290 #define LNET_PING_FEAT_MASK (LNET_PING_FEAT_BASE | \
291 LNET_PING_FEAT_NI_STATUS)
292
293 /* router checker data, per router */
294 #define LNET_MAX_RTR_NIS 16
295 #define LNET_PINGINFO_SIZE offsetof(lnet_ping_info_t, pi_ni[LNET_MAX_RTR_NIS])
296 typedef struct {
297 /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */
298 struct list_head rcd_list;
299 lnet_handle_md_t rcd_mdh; /* ping buffer MD */
300 struct lnet_peer *rcd_gateway; /* reference to gateway */
301 lnet_ping_info_t *rcd_pinginfo; /* ping buffer */
302 } lnet_rc_data_t;
303
304 typedef struct lnet_peer {
305 struct list_head lp_hashlist; /* chain on peer hash */
306 struct list_head lp_txq; /* messages blocking for
307 tx credits */
308 struct list_head lp_rtrq; /* messages blocking for
309 router credits */
310 struct list_head lp_rtr_list; /* chain on router list */
311 int lp_txcredits; /* # tx credits available */
312 int lp_mintxcredits; /* low water mark */
313 int lp_rtrcredits; /* # router credits */
314 int lp_minrtrcredits; /* low water mark */
315 unsigned int lp_alive:1; /* alive/dead? */
316 unsigned int lp_notify:1; /* notification outstanding? */
317 unsigned int lp_notifylnd:1;/* outstanding notification
318 for LND? */
319 unsigned int lp_notifying:1; /* some thread is handling
320 notification */
321 unsigned int lp_ping_notsent;/* SEND event outstanding
322 from ping */
323 int lp_alive_count; /* # times router went
324 dead<->alive */
325 long lp_txqnob; /* bytes queued for sending */
326 unsigned long lp_timestamp; /* time of last aliveness
327 news */
328 unsigned long lp_ping_timestamp;/* time of last ping
329 attempt */
330 unsigned long lp_ping_deadline; /* != 0 if ping reply
331 expected */
332 unsigned long lp_last_alive; /* when I was last alive */
333 unsigned long lp_last_query; /* when lp_ni was queried
334 last time */
335 lnet_ni_t *lp_ni; /* interface peer is on */
336 lnet_nid_t lp_nid; /* peer's NID */
337 int lp_refcount; /* # refs */
338 int lp_cpt; /* CPT this peer attached on */
339 /* # refs from lnet_route_t::lr_gateway */
340 int lp_rtr_refcount;
341 /* returned RC ping features */
342 unsigned int lp_ping_feats;
343 struct list_head lp_routes; /* routers on this peer */
344 lnet_rc_data_t *lp_rcd; /* router checker state */
345 } lnet_peer_t;
346
347 /* peer hash size */
348 #define LNET_PEER_HASH_BITS 9
349 #define LNET_PEER_HASH_SIZE (1 << LNET_PEER_HASH_BITS)
350
351 /* peer hash table */
352 struct lnet_peer_table {
353 int pt_version; /* /proc validity stamp */
354 int pt_number; /* # peers extant */
355 /* # zombies to go to deathrow (and not there yet) */
356 int pt_zombies;
357 struct list_head pt_deathrow; /* zombie peers */
358 struct list_head *pt_hash; /* NID->peer hash */
359 };
360
361 /*
362 * peer aliveness is enabled only on routers for peers in a network where the
363 * lnet_ni_t::ni_peertimeout has been set to a positive value
364 */
365 #define lnet_peer_aliveness_enabled(lp) (the_lnet.ln_routing && \
366 (lp)->lp_ni->ni_peertimeout > 0)
367
368 typedef struct {
369 struct list_head lr_list; /* chain on net */
370 struct list_head lr_gwlist; /* chain on gateway */
371 lnet_peer_t *lr_gateway; /* router node */
372 __u32 lr_net; /* remote network number */
373 int lr_seq; /* sequence for round-robin */
374 unsigned int lr_downis; /* number of down NIs */
375 unsigned int lr_hops; /* how far I am */
376 unsigned int lr_priority; /* route priority */
377 } lnet_route_t;
378
379 #define LNET_REMOTE_NETS_HASH_DEFAULT (1U << 7)
380 #define LNET_REMOTE_NETS_HASH_MAX (1U << 16)
381 #define LNET_REMOTE_NETS_HASH_SIZE (1 << the_lnet.ln_remote_nets_hbits)
382
383 typedef struct {
384 struct list_head lrn_list; /* chain on
385 ln_remote_nets_hash */
386 struct list_head lrn_routes; /* routes to me */
387 __u32 lrn_net; /* my net number */
388 } lnet_remotenet_t;
389
390 /** lnet message has credit and can be submitted to lnd for send/receive */
391 #define LNET_CREDIT_OK 0
392 /** lnet message is waiting for credit */
393 #define LNET_CREDIT_WAIT 1
394
395 typedef struct {
396 struct list_head rbp_bufs; /* my free buffer pool */
397 struct list_head rbp_msgs; /* messages blocking
398 for a buffer */
399 int rbp_npages; /* # pages in each buffer */
400 int rbp_nbuffers; /* # buffers */
401 int rbp_credits; /* # free buffers /
402 blocked messages */
403 int rbp_mincredits; /* low water mark */
404 } lnet_rtrbufpool_t;
405
406 typedef struct {
407 struct list_head rb_list; /* chain on rbp_bufs */
408 lnet_rtrbufpool_t *rb_pool; /* owning pool */
409 lnet_kiov_t rb_kiov[0]; /* the buffer space */
410 } lnet_rtrbuf_t;
411
412 #define LNET_PEER_HASHSIZE 503 /* prime! */
413
414 #define LNET_TINY_BUF_IDX 0
415 #define LNET_SMALL_BUF_IDX 1
416 #define LNET_LARGE_BUF_IDX 2
417
418 /* # different router buffer pools */
419 #define LNET_NRBPOOLS (LNET_LARGE_BUF_IDX + 1)
420
421 enum {
422 /* Didn't match anything */
423 LNET_MATCHMD_NONE = (1 << 0),
424 /* Matched OK */
425 LNET_MATCHMD_OK = (1 << 1),
426 /* Must be discarded */
427 LNET_MATCHMD_DROP = (1 << 2),
428 /* match and buffer is exhausted */
429 LNET_MATCHMD_EXHAUSTED = (1 << 3),
430 /* match or drop */
431 LNET_MATCHMD_FINISH = (LNET_MATCHMD_OK | LNET_MATCHMD_DROP),
432 };
433
434 /* Options for lnet_portal_t::ptl_options */
435 #define LNET_PTL_LAZY (1 << 0)
436 #define LNET_PTL_MATCH_UNIQUE (1 << 1) /* unique match, for RDMA */
437 #define LNET_PTL_MATCH_WILDCARD (1 << 2) /* wildcard match,
438 request portal */
439
440 /* parameter for matching operations (GET, PUT) */
441 struct lnet_match_info {
442 __u64 mi_mbits;
443 lnet_process_id_t mi_id;
444 unsigned int mi_opc;
445 unsigned int mi_portal;
446 unsigned int mi_rlength;
447 unsigned int mi_roffset;
448 };
449
450 /* ME hash of RDMA portal */
451 #define LNET_MT_HASH_BITS 8
452 #define LNET_MT_HASH_SIZE (1 << LNET_MT_HASH_BITS)
453 #define LNET_MT_HASH_MASK (LNET_MT_HASH_SIZE - 1)
454 /*
455 * we allocate (LNET_MT_HASH_SIZE + 1) entries for lnet_match_table::mt_hash,
456 * the last entry is reserved for MEs with ignore-bits
457 */
458 #define LNET_MT_HASH_IGNORE LNET_MT_HASH_SIZE
459 /*
460 * __u64 has 2^6 bits, so need 2^(LNET_MT_HASH_BITS - LNET_MT_BITS_U64) which
461 * is 4 __u64s as bit-map, and add an extra __u64 (only use one bit) for the
462 * ME-list with ignore-bits, which is mtable::mt_hash[LNET_MT_HASH_IGNORE]
463 */
464 #define LNET_MT_BITS_U64 6 /* 2^6 bits */
465 #define LNET_MT_EXHAUSTED_BITS (LNET_MT_HASH_BITS - LNET_MT_BITS_U64)
466 #define LNET_MT_EXHAUSTED_BMAP ((1 << LNET_MT_EXHAUSTED_BITS) + 1)
467
468 /* portal match table */
469 struct lnet_match_table {
470 /* reserved for upcoming patches, CPU partition ID */
471 unsigned int mt_cpt;
472 unsigned int mt_portal; /* portal index */
473 /*
474 * match table is set as "enabled" if there's non-exhausted MD
475 * attached on mt_mhash, it's only valid for wildcard portal
476 */
477 unsigned int mt_enabled;
478 /* bitmap to flag whether MEs on mt_hash are exhausted or not */
479 __u64 mt_exhausted[LNET_MT_EXHAUSTED_BMAP];
480 struct list_head *mt_mhash; /* matching hash */
481 };
482
483 /* these are only useful for wildcard portal */
484 /* Turn off message rotor for wildcard portals */
485 #define LNET_PTL_ROTOR_OFF 0
486 /* round-robin dispatch all PUT messages for wildcard portals */
487 #define LNET_PTL_ROTOR_ON 1
488 /* round-robin dispatch routed PUT message for wildcard portals */
489 #define LNET_PTL_ROTOR_RR_RT 2
490 /* dispatch routed PUT message by hashing source NID for wildcard portals */
491 #define LNET_PTL_ROTOR_HASH_RT 3
492
493 typedef struct lnet_portal {
494 spinlock_t ptl_lock;
495 unsigned int ptl_index; /* portal ID, reserved */
496 /* flags on this portal: lazy, unique... */
497 unsigned int ptl_options;
498 /* list of messages which are stealing buffer */
499 struct list_head ptl_msg_stealing;
500 /* messages blocking for MD */
501 struct list_head ptl_msg_delayed;
502 /* Match table for each CPT */
503 struct lnet_match_table **ptl_mtables;
504 /* spread rotor of incoming "PUT" */
505 unsigned int ptl_rotor;
506 /* # active entries for this portal */
507 int ptl_mt_nmaps;
508 /* array of active entries' cpu-partition-id */
509 int ptl_mt_maps[0];
510 } lnet_portal_t;
511
512 #define LNET_LH_HASH_BITS 12
513 #define LNET_LH_HASH_SIZE (1ULL << LNET_LH_HASH_BITS)
514 #define LNET_LH_HASH_MASK (LNET_LH_HASH_SIZE - 1)
515
516 /* resource container (ME, MD, EQ) */
517 struct lnet_res_container {
518 unsigned int rec_type; /* container type */
519 __u64 rec_lh_cookie; /* cookie generator */
520 struct list_head rec_active; /* active resource list */
521 struct list_head *rec_lh_hash; /* handle hash */
522 };
523
524 /* message container */
525 struct lnet_msg_container {
526 int msc_init; /* initialized or not */
527 /* max # threads finalizing */
528 int msc_nfinalizers;
529 /* msgs waiting to complete finalizing */
530 struct list_head msc_finalizing;
531 struct list_head msc_active; /* active message list */
532 /* threads doing finalization */
533 void **msc_finalizers;
534 };
535
536 /* Router Checker states */
537 #define LNET_RC_STATE_SHUTDOWN 0 /* not started */
538 #define LNET_RC_STATE_RUNNING 1 /* started up OK */
539 #define LNET_RC_STATE_STOPPING 2 /* telling thread to stop */
540
541 typedef struct {
542 /* CPU partition table of LNet */
543 struct cfs_cpt_table *ln_cpt_table;
544 /* number of CPTs in ln_cpt_table */
545 unsigned int ln_cpt_number;
546 unsigned int ln_cpt_bits;
547
548 /* protect LNet resources (ME/MD/EQ) */
549 struct cfs_percpt_lock *ln_res_lock;
550 /* # portals */
551 int ln_nportals;
552 /* the vector of portals */
553 lnet_portal_t **ln_portals;
554 /* percpt ME containers */
555 struct lnet_res_container **ln_me_containers;
556 /* percpt MD container */
557 struct lnet_res_container **ln_md_containers;
558
559 /* Event Queue container */
560 struct lnet_res_container ln_eq_container;
561 wait_queue_head_t ln_eq_waitq;
562 spinlock_t ln_eq_wait_lock;
563 unsigned int ln_remote_nets_hbits;
564
565 /* protect NI, peer table, credits, routers, rtrbuf... */
566 struct cfs_percpt_lock *ln_net_lock;
567 /* percpt message containers for active/finalizing/freed message */
568 struct lnet_msg_container **ln_msg_containers;
569 lnet_counters_t **ln_counters;
570 struct lnet_peer_table **ln_peer_tables;
571 /* failure simulation */
572 struct list_head ln_test_peers;
573
574 struct list_head ln_nis; /* LND instances */
575 /* NIs bond on specific CPT(s) */
576 struct list_head ln_nis_cpt;
577 /* dying LND instances */
578 struct list_head ln_nis_zombie;
579 lnet_ni_t *ln_loni; /* the loopback NI */
580 /* NI to wait for events in */
581 lnet_ni_t *ln_eq_waitni;
582
583 /* remote networks with routes to them */
584 struct list_head *ln_remote_nets_hash;
585 /* validity stamp */
586 __u64 ln_remote_nets_version;
587 /* list of all known routers */
588 struct list_head ln_routers;
589 /* validity stamp */
590 __u64 ln_routers_version;
591 /* percpt router buffer pools */
592 lnet_rtrbufpool_t **ln_rtrpools;
593
594 lnet_handle_md_t ln_ping_target_md;
595 lnet_handle_eq_t ln_ping_target_eq;
596 lnet_ping_info_t *ln_ping_info;
597
598 /* router checker startup/shutdown state */
599 int ln_rc_state;
600 /* router checker's event queue */
601 lnet_handle_eq_t ln_rc_eqh;
602 /* rcd still pending on net */
603 struct list_head ln_rcd_deathrow;
604 /* rcd ready for free */
605 struct list_head ln_rcd_zombie;
606 /* serialise startup/shutdown */
607 struct semaphore ln_rc_signal;
608
609 struct mutex ln_api_mutex;
610 struct mutex ln_lnd_mutex;
611 int ln_init; /* lnet_init()
612 called? */
613 /* Have I called LNetNIInit myself? */
614 int ln_niinit_self;
615 /* LNetNIInit/LNetNIFini counter */
616 int ln_refcount;
617 /* shutdown in progress */
618 int ln_shutdown;
619
620 int ln_routing; /* am I a router? */
621 lnet_pid_t ln_pid; /* requested pid */
622 /* uniquely identifies this ni in this epoch */
623 __u64 ln_interface_cookie;
624 /* registered LNDs */
625 struct list_head ln_lnds;
626
627 /* test protocol compatibility flags */
628 int ln_testprotocompat;
629
630 /*
631 * 0 - load the NIs from the mod params
632 * 1 - do not load the NIs from the mod params
633 * Reverse logic to ensure that other calls to LNetNIInit
634 * need no change
635 */
636 bool ln_nis_from_mod_params;
637
638 } lnet_t;
639
640 #endif
Linux kernel - Deliverables
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