4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lnet/include/lnet/lib-types.h
34 * Types used by the library side routines that do not need to be
35 * exposed to the user application
38 #ifndef __LNET_LIB_TYPES_H__
39 #define __LNET_LIB_TYPES_H__
42 # error This include is only for kernel use.
45 #include <linux/kthread.h>
46 #include <linux/uio.h>
47 #include <linux/types.h>
49 #include <lnet/lnetctl.h>
51 /* Max payload size */
52 #ifndef CONFIG_LNET_MAX_PAYLOAD
53 # error "CONFIG_LNET_MAX_PAYLOAD must be defined in config.h"
56 #define LNET_MAX_PAYLOAD CONFIG_LNET_MAX_PAYLOAD
57 #if (LNET_MAX_PAYLOAD < LNET_MTU)
58 # error "LNET_MAX_PAYLOAD too small - error in configure --with-max-payload-mb"
59 #elif (LNET_MAX_PAYLOAD > (PAGE_SIZE * LNET_MAX_IOV))
60 # error "LNET_MAX_PAYLOAD too large - error in configure --with-max-payload-mb"
66 typedef struct lnet_msg {
67 struct list_head msg_activelist;
68 struct list_head msg_list; /* Q for credits/MD */
70 lnet_process_id_t msg_target;
71 /* where is it from, it's only for building event */
75 /* committed for sending */
76 unsigned int msg_tx_committed:1;
77 /* CPT # this message committed for sending */
78 unsigned int msg_tx_cpt:15;
79 /* committed for receiving */
80 unsigned int msg_rx_committed:1;
81 /* CPT # this message committed for receiving */
82 unsigned int msg_rx_cpt:15;
83 /* queued for tx credit */
84 unsigned int msg_tx_delayed:1;
85 /* queued for RX buffer */
86 unsigned int msg_rx_delayed:1;
87 /* ready for pending on RX delay list */
88 unsigned int msg_rx_ready_delay:1;
90 unsigned int msg_vmflush:1; /* VM trying to free memory */
91 unsigned int msg_target_is_router:1; /* sending to a router */
92 unsigned int msg_routing:1; /* being forwarded */
93 unsigned int msg_ack:1; /* ack on finalize (PUT) */
94 unsigned int msg_sending:1; /* outgoing message */
95 unsigned int msg_receiving:1; /* being received */
96 unsigned int msg_txcredit:1; /* taken an NI send credit */
97 unsigned int msg_peertxcredit:1; /* taken a peer send credit */
98 unsigned int msg_rtrcredit:1; /* taken a globel router credit */
99 unsigned int msg_peerrtrcredit:1; /* taken a peer router credit */
100 unsigned int msg_onactivelist:1; /* on the activelist */
101 unsigned int msg_rdma_get:1;
103 struct lnet_peer_ni *msg_txpeer; /* peer I'm sending to */
104 struct lnet_peer_ni *msg_rxpeer; /* peer I received from */
107 struct lnet_libmd *msg_md;
108 /* the NI the message was sent or received over */
109 struct lnet_ni *msg_txni;
110 struct lnet_ni *msg_rxni;
112 unsigned int msg_len;
113 unsigned int msg_wanted;
114 unsigned int msg_offset;
115 unsigned int msg_niov;
116 struct kvec *msg_iov;
117 lnet_kiov_t *msg_kiov;
124 typedef struct lnet_libhandle {
125 struct list_head lh_hash_chain;
129 #define lh_entry(ptr, type, member) \
130 ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
132 typedef struct lnet_eq {
133 struct list_head eq_list;
134 lnet_libhandle_t eq_lh;
135 lnet_seq_t eq_enq_seq;
136 lnet_seq_t eq_deq_seq;
137 unsigned int eq_size;
138 lnet_eq_handler_t eq_callback;
139 lnet_event_t *eq_events;
140 int **eq_refs; /* percpt refcount for EQ */
143 typedef struct lnet_me {
144 struct list_head me_list;
145 lnet_libhandle_t me_lh;
146 lnet_process_id_t me_match_id;
147 unsigned int me_portal;
148 unsigned int me_pos; /* hash offset in mt_hash */
150 __u64 me_ignore_bits;
151 lnet_unlink_t me_unlink;
152 struct lnet_libmd *me_md;
155 typedef struct lnet_libmd {
156 struct list_head md_list;
157 lnet_libhandle_t md_lh;
160 unsigned int md_offset;
161 unsigned int md_length;
162 unsigned int md_max_size;
165 unsigned int md_options;
166 unsigned int md_flags;
167 unsigned int md_niov; /* # frags at end of struct */
171 struct kvec iov[LNET_MAX_IOV];
172 lnet_kiov_t kiov[LNET_MAX_IOV];
176 #define LNET_MD_FLAG_ZOMBIE (1 << 0)
177 #define LNET_MD_FLAG_AUTO_UNLINK (1 << 1)
178 #define LNET_MD_FLAG_ABORTED (1 << 2)
181 /* info about peers we are trying to fail */
182 struct list_head tp_list; /* ln_test_peers */
183 lnet_nid_t tp_nid; /* matching nid */
184 unsigned int tp_threshold; /* # failures to simulate */
187 #define LNET_COOKIE_TYPE_MD 1
188 #define LNET_COOKIE_TYPE_ME 2
189 #define LNET_COOKIE_TYPE_EQ 3
190 #define LNET_COOKIE_TYPE_BITS 2
191 #define LNET_COOKIE_MASK ((1ULL << LNET_COOKIE_TYPE_BITS) - 1ULL)
193 struct lnet_ni; /* forward ref */
196 typedef struct lnet_lnd
198 /* fields managed by portals */
199 struct list_head lnd_list; /* stash in the LND table */
200 int lnd_refcount; /* # active instances */
202 /* fields initialized by the LND */
205 int (*lnd_startup)(struct lnet_ni *ni);
206 void (*lnd_shutdown)(struct lnet_ni *ni);
207 int (*lnd_ctl)(struct lnet_ni *ni, unsigned int cmd, void *arg);
209 /* In data movement APIs below, payload buffers are described as a set
210 * of 'niov' fragments which are...
212 * in virtual memory (struct kvec *iov != NULL)
214 * in pages (kernel only: plt_kiov_t *kiov != NULL).
215 * The LND may NOT overwrite these fragment descriptors.
216 * An 'offset' and may specify a byte offset within the set of
217 * fragments to start from
220 /* Start sending a preformatted message. 'private' is NULL for PUT and
221 * GET messages; otherwise this is a response to an incoming message
222 * and 'private' is the 'private' passed to lnet_parse(). Return
223 * non-zero for immediate failure, otherwise complete later with
225 int (*lnd_send)(struct lnet_ni *ni, void *private, lnet_msg_t *msg);
227 /* Start receiving 'mlen' bytes of payload data, skipping the following
228 * 'rlen' - 'mlen' bytes. 'private' is the 'private' passed to
229 * lnet_parse(). Return non-zero for immedaite failure, otherwise
230 * complete later with lnet_finalize(). This also gives back a receive
231 * credit if the LND does flow control. */
232 int (*lnd_recv)(struct lnet_ni *ni, void *private, lnet_msg_t *msg,
233 int delayed, unsigned int niov,
234 struct kvec *iov, lnet_kiov_t *kiov,
235 unsigned int offset, unsigned int mlen, unsigned int rlen);
237 /* lnet_parse() has had to delay processing of this message
238 * (e.g. waiting for a forwarding buffer or send credits). Give the
239 * LND a chance to free urgently needed resources. If called, return 0
240 * for success and do NOT give back a receive credit; that has to wait
241 * until lnd_recv() gets called. On failure return < 0 and
242 * release resources; lnd_recv() will not be called. */
243 int (*lnd_eager_recv)(struct lnet_ni *ni, void *private, lnet_msg_t *msg,
244 void **new_privatep);
246 /* notification of peer health */
247 void (*lnd_notify)(struct lnet_ni *ni, lnet_nid_t peer, int alive);
249 /* query of peer aliveness */
250 void (*lnd_query)(struct lnet_ni *ni, lnet_nid_t peer, cfs_time_t *when);
252 /* accept a new connection */
253 int (*lnd_accept)(struct lnet_ni *ni, struct socket *sock);
256 typedef struct lnet_ni_status {
260 } WIRE_ATTR lnet_ni_status_t;
262 struct lnet_tx_queue {
263 int tq_credits; /* # tx credits free */
264 int tq_credits_min; /* lowest it's been */
265 int tq_credits_max; /* total # tx credits */
266 struct list_head tq_delayed; /* delayed TXs */
269 enum lnet_net_state {
270 /* set when net block is allocated */
271 LNET_NET_STATE_INIT = 0,
272 /* set when NIs in net are started successfully */
273 LNET_NET_STATE_ACTIVE,
274 /* set if all NIs in net are in FAILED state */
275 LNET_NET_STATE_INACTIVE,
276 /* set when shutting down a NET */
277 LNET_NET_STATE_DELETING
281 /* set when NI block is allocated */
282 LNET_NI_STATE_INIT = 0,
283 /* set when NI is started successfully */
284 LNET_NI_STATE_ACTIVE,
285 /* set when LND notifies NI failed */
286 LNET_NI_STATE_FAILED,
287 /* set when LND notifies NI degraded */
288 LNET_NI_STATE_DEGRADED,
289 /* set when shuttding down NI */
290 LNET_NI_STATE_DELETING
294 /* chain on the ln_nets */
295 struct list_head net_list;
297 /* net ID, which is compoed of
298 * (net_type << 16) | net_num.
299 * net_type can be one of the enumarated types defined in
300 * lnet/include/lnet/nidstr.h */
303 /* priority of the network */
306 /* total number of CPTs in the array */
309 /* cumulative CPTs of all NIs in this net */
312 /* network tunables */
313 struct lnet_ioctl_config_lnd_cmn_tunables net_tunables;
316 * boolean to indicate that the tunables have been set and
319 bool net_tunables_set;
321 /* procedural interface */
324 /* list of NIs on this net */
325 struct list_head net_ni_list;
327 /* list of NIs being added, but not started yet */
328 struct list_head net_ni_added;
330 /* dying LND instances */
331 struct list_head net_ni_zombie;
334 enum lnet_net_state net_state;
337 typedef struct lnet_ni {
338 /* chain on the lnet_net structure */
339 struct list_head ni_netlist;
341 /* chain on net_ni_cpt */
342 struct list_head ni_cptlist;
349 /* bond NI on some CPTs */
352 /* interface's NID */
355 /* instance-specific data */
358 /* percpt TX queues */
359 struct lnet_tx_queue **ni_tx_queues;
361 /* percpt reference count */
364 /* when I was last alive */
367 /* pointer to parent network */
368 struct lnet_net *ni_net;
370 /* my health status */
371 lnet_ni_status_t *ni_status;
374 enum lnet_ni_state ni_state;
376 /* per NI LND tunables */
377 struct lnet_lnd_tunables ni_lnd_tunables;
379 /* lnd tunables set explicitly */
380 bool ni_lnd_tunables_set;
383 * equivalent interfaces to use
384 * This is an array because socklnd bonding can still be configured
386 char *ni_interfaces[LNET_MAX_INTERFACES];
387 struct net *ni_net_ns; /* original net namespace */
390 #define LNET_PROTO_PING_MATCHBITS 0x8000000000000000LL
392 /* NB: value of these features equal to LNET_PROTO_PING_VERSION_x
393 * of old LNet, so there shouldn't be any compatibility issue */
394 #define LNET_PING_FEAT_INVAL (0) /* no feature */
395 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
396 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
397 #define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
399 #define LNET_PING_FEAT_MASK (LNET_PING_FEAT_BASE | \
400 LNET_PING_FEAT_NI_STATUS)
402 typedef struct lnet_ping_info {
407 struct lnet_ni_status pi_ni[0];
408 } WIRE_ATTR lnet_ping_info_t;
410 /* router checker data, per router */
411 #define LNET_MAX_RTR_NIS 16
412 #define LNET_PINGINFO_SIZE offsetof(struct lnet_ping_info, pi_ni[LNET_MAX_RTR_NIS])
414 /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */
415 struct list_head rcd_list;
416 lnet_handle_md_t rcd_mdh; /* ping buffer MD */
417 struct lnet_peer_ni *rcd_gateway; /* reference to gateway */
418 struct lnet_ping_info *rcd_pinginfo; /* ping buffer */
421 struct lnet_peer_ni {
422 /* cahian on peer_net */
423 struct list_head lpni_on_peer_net_list;
425 /* chain on peer hash */
426 struct list_head lpni_hashlist;
427 /* messages blocking for tx credits */
428 struct list_head lpni_txq;
429 /* messages blocking for router credits */
430 struct list_head lpni_rtrq;
431 /* chain on router list */
432 struct list_head lpni_rtr_list;
433 /* pointer to peer net I'm part of */
434 struct lnet_peer_net *lpni_peer_net;
435 /* # tx credits available */
438 int lpni_mintxcredits;
439 /* # router credits */
442 int lpni_minrtrcredits;
444 unsigned int lpni_alive:1;
445 /* notification outstanding? */
446 unsigned int lpni_notify:1;
447 /* outstanding notification for LND? */
448 unsigned int lpni_notifylnd:1;
449 /* some thread is handling notification */
450 unsigned int lpni_notifying:1;
451 /* SEND event outstanding from ping */
452 unsigned int lpni_ping_notsent;
453 /* # times router went dead<->alive */
454 int lpni_alive_count;
455 /* bytes queued for sending */
457 /* time of last aliveness news */
458 cfs_time_t lpni_timestamp;
459 /* time of last ping attempt */
460 cfs_time_t lpni_ping_timestamp;
461 /* != 0 if ping reply expected */
462 cfs_time_t lpni_ping_deadline;
463 /* when I was last alive */
464 cfs_time_t lpni_last_alive;
465 /* when lpni_ni was queried last time */
466 cfs_time_t lpni_last_query;
467 /* network peer is on */
468 struct lnet_net *lpni_net;
472 atomic_t lpni_refcount;
473 /* CPT this peer attached on */
475 /* # refs from lnet_route_t::lr_gateway */
476 int lpni_rtr_refcount;
477 /* returned RC ping features */
478 unsigned int lpni_ping_feats;
479 struct list_head lpni_routes; /* routers on this peer */
480 lnet_rc_data_t *lpni_rcd; /* router checker state */
484 /* chain on global peer list */
485 struct list_head lp_on_lnet_peer_list;
487 /* list of peer nets */
488 struct list_head lp_peer_nets;
490 /* primary NID of the peer */
491 lnet_nid_t lp_primary_nid;
494 struct lnet_peer_net {
495 /* chain on peer block */
496 struct list_head lpn_on_peer_list;
498 /* list of peer_nis on this network */
499 struct list_head lpn_peer_nis;
501 /* pointer to the peer I'm part of */
502 struct lnet_peer *lpn_peer;
509 #define LNET_PEER_HASH_BITS 9
510 #define LNET_PEER_HASH_SIZE (1 << LNET_PEER_HASH_BITS)
512 /* peer hash table */
513 struct lnet_peer_table {
514 int pt_version; /* /proc validity stamp */
515 int pt_number; /* # peers extant */
516 int pt_zombies; /* # zombies to go to deathrow
517 * (and not there yet) */
518 struct list_head pt_deathrow; /* zombie peers */
519 struct list_head *pt_hash; /* NID->peer hash */
522 /* peer aliveness is enabled only on routers for peers in a network where the
523 * lnet_ni_t::ni_peertimeout has been set to a positive value */
524 #define lnet_peer_aliveness_enabled(lp) (the_lnet.ln_routing != 0 && \
525 (lp)->lpni_net->net_tunables.lct_peer_timeout > 0)
528 struct list_head lr_list; /* chain on net */
529 struct list_head lr_gwlist; /* chain on gateway */
530 struct lnet_peer_ni *lr_gateway; /* router node */
531 __u32 lr_net; /* remote network number */
532 int lr_seq; /* sequence for round-robin */
533 unsigned int lr_downis; /* number of down NIs */
534 __u32 lr_hops; /* how far I am */
535 unsigned int lr_priority; /* route priority */
538 #define LNET_REMOTE_NETS_HASH_DEFAULT (1U << 7)
539 #define LNET_REMOTE_NETS_HASH_MAX (1U << 16)
540 #define LNET_REMOTE_NETS_HASH_SIZE (1 << the_lnet.ln_remote_nets_hbits)
543 /* chain on ln_remote_nets_hash */
544 struct list_head lrn_list;
546 struct list_head lrn_routes;
551 /** lnet message has credit and can be submitted to lnd for send/receive */
552 #define LNET_CREDIT_OK 0
553 /** lnet message is waiting for credit */
554 #define LNET_CREDIT_WAIT 1
557 /* my free buffer pool */
558 struct list_head rbp_bufs;
559 /* messages blocking for a buffer */
560 struct list_head rbp_msgs;
561 /* # pages in each buffer */
563 /* requested number of buffers */
564 int rbp_req_nbuffers;
565 /* # buffers actually allocated */
567 /* # free buffers / blocked messages */
574 struct list_head rb_list; /* chain on rbp_bufs */
575 lnet_rtrbufpool_t *rb_pool; /* owning pool */
576 lnet_kiov_t rb_kiov[0]; /* the buffer space */
579 #define LNET_PEER_HASHSIZE 503 /* prime! */
582 /* Didn't match anything */
583 LNET_MATCHMD_NONE = (1 << 0),
585 LNET_MATCHMD_OK = (1 << 1),
586 /* Must be discarded */
587 LNET_MATCHMD_DROP = (1 << 2),
588 /* match and buffer is exhausted */
589 LNET_MATCHMD_EXHAUSTED = (1 << 3),
591 LNET_MATCHMD_FINISH = (LNET_MATCHMD_OK | LNET_MATCHMD_DROP),
594 /* Options for lnet_portal_t::ptl_options */
595 #define LNET_PTL_LAZY (1 << 0)
596 #define LNET_PTL_MATCH_UNIQUE (1 << 1) /* unique match, for RDMA */
597 #define LNET_PTL_MATCH_WILDCARD (1 << 2) /* wildcard match, request portal */
599 /* parameter for matching operations (GET, PUT) */
600 struct lnet_match_info {
602 lnet_process_id_t mi_id;
605 unsigned int mi_portal;
606 unsigned int mi_rlength;
607 unsigned int mi_roffset;
610 /* ME hash of RDMA portal */
611 #define LNET_MT_HASH_BITS 8
612 #define LNET_MT_HASH_SIZE (1 << LNET_MT_HASH_BITS)
613 #define LNET_MT_HASH_MASK (LNET_MT_HASH_SIZE - 1)
614 /* we allocate (LNET_MT_HASH_SIZE + 1) entries for lnet_match_table::mt_hash,
615 * the last entry is reserved for MEs with ignore-bits */
616 #define LNET_MT_HASH_IGNORE LNET_MT_HASH_SIZE
617 /* __u64 has 2^6 bits, so need 2^(LNET_MT_HASH_BITS - LNET_MT_BITS_U64) which
618 * is 4 __u64s as bit-map, and add an extra __u64 (only use one bit) for the
619 * ME-list with ignore-bits, which is mtable::mt_hash[LNET_MT_HASH_IGNORE] */
620 #define LNET_MT_BITS_U64 6 /* 2^6 bits */
621 #define LNET_MT_EXHAUSTED_BITS (LNET_MT_HASH_BITS - LNET_MT_BITS_U64)
622 #define LNET_MT_EXHAUSTED_BMAP ((1 << LNET_MT_EXHAUSTED_BITS) + 1)
624 /* portal match table */
625 struct lnet_match_table {
626 /* reserved for upcoming patches, CPU partition ID */
628 unsigned int mt_portal; /* portal index */
629 /* match table is set as "enabled" if there's non-exhausted MD
630 * attached on mt_mhash, it's only valid for wildcard portal */
631 unsigned int mt_enabled;
632 /* bitmap to flag whether MEs on mt_hash are exhausted or not */
633 __u64 mt_exhausted[LNET_MT_EXHAUSTED_BMAP];
634 struct list_head *mt_mhash; /* matching hash */
637 /* these are only useful for wildcard portal */
638 /* Turn off message rotor for wildcard portals */
639 #define LNET_PTL_ROTOR_OFF 0
640 /* round-robin dispatch all PUT messages for wildcard portals */
641 #define LNET_PTL_ROTOR_ON 1
642 /* round-robin dispatch routed PUT message for wildcard portals */
643 #define LNET_PTL_ROTOR_RR_RT 2
644 /* dispatch routed PUT message by hashing source NID for wildcard portals */
645 #define LNET_PTL_ROTOR_HASH_RT 3
647 typedef struct lnet_portal {
649 unsigned int ptl_index; /* portal ID, reserved */
650 /* flags on this portal: lazy, unique... */
651 unsigned int ptl_options;
652 /* list of messages which are stealing buffer */
653 struct list_head ptl_msg_stealing;
654 /* messages blocking for MD */
655 struct list_head ptl_msg_delayed;
656 /* Match table for each CPT */
657 struct lnet_match_table **ptl_mtables;
658 /* spread rotor of incoming "PUT" */
659 unsigned int ptl_rotor;
660 /* # active entries for this portal */
662 /* array of active entries' cpu-partition-id */
666 #define LNET_LH_HASH_BITS 12
667 #define LNET_LH_HASH_SIZE (1ULL << LNET_LH_HASH_BITS)
668 #define LNET_LH_HASH_MASK (LNET_LH_HASH_SIZE - 1)
670 /* resource container (ME, MD, EQ) */
671 struct lnet_res_container {
672 unsigned int rec_type; /* container type */
673 __u64 rec_lh_cookie; /* cookie generator */
674 struct list_head rec_active; /* active resource list */
675 struct list_head *rec_lh_hash; /* handle hash */
678 /* message container */
679 struct lnet_msg_container {
680 int msc_init; /* initialized or not */
681 /* max # threads finalizing */
683 /* msgs waiting to complete finalizing */
684 struct list_head msc_finalizing;
685 struct list_head msc_active; /* active message list */
686 /* threads doing finalization */
687 void **msc_finalizers;
690 /* Router Checker states */
691 #define LNET_RC_STATE_SHUTDOWN 0 /* not started */
692 #define LNET_RC_STATE_RUNNING 1 /* started up OK */
693 #define LNET_RC_STATE_STOPPING 2 /* telling thread to stop */
697 /* CPU partition table of LNet */
698 struct cfs_cpt_table *ln_cpt_table;
699 /* number of CPTs in ln_cpt_table */
700 unsigned int ln_cpt_number;
701 unsigned int ln_cpt_bits;
703 /* protect LNet resources (ME/MD/EQ) */
704 struct cfs_percpt_lock *ln_res_lock;
707 /* the vector of portals */
708 lnet_portal_t **ln_portals;
709 /* percpt ME containers */
710 struct lnet_res_container **ln_me_containers;
711 /* percpt MD container */
712 struct lnet_res_container **ln_md_containers;
714 /* Event Queue container */
715 struct lnet_res_container ln_eq_container;
716 wait_queue_head_t ln_eq_waitq;
717 spinlock_t ln_eq_wait_lock;
719 unsigned int ln_remote_nets_hbits;
721 /* protect NI, peer table, credits, routers, rtrbuf... */
722 struct cfs_percpt_lock *ln_net_lock;
723 /* percpt message containers for active/finalizing/freed message */
724 struct lnet_msg_container **ln_msg_containers;
725 lnet_counters_t **ln_counters;
726 struct lnet_peer_table **ln_peer_tables;
727 /* list of configured or discovered peers */
728 struct list_head ln_peers;
729 /* failure simulation */
730 struct list_head ln_test_peers;
731 struct list_head ln_drop_rules;
732 struct list_head ln_delay_rules;
734 struct list_head ln_nets;
735 /* the loopback NI */
736 struct lnet_ni *ln_loni;
737 /* network zombie list */
738 struct list_head ln_net_zombie;
740 /* remote networks with routes to them */
741 struct list_head *ln_remote_nets_hash;
743 __u64 ln_remote_nets_version;
744 /* list of all known routers */
745 struct list_head ln_routers;
747 __u64 ln_routers_version;
748 /* percpt router buffer pools */
749 lnet_rtrbufpool_t **ln_rtrpools;
751 lnet_handle_md_t ln_ping_target_md;
752 lnet_handle_eq_t ln_ping_target_eq;
753 struct lnet_ping_info *ln_ping_info;
755 /* router checker startup/shutdown state */
757 /* router checker's event queue */
758 lnet_handle_eq_t ln_rc_eqh;
759 /* rcd still pending on net */
760 struct list_head ln_rcd_deathrow;
761 /* rcd ready for free */
762 struct list_head ln_rcd_zombie;
763 /* serialise startup/shutdown */
764 struct semaphore ln_rc_signal;
766 struct mutex ln_api_mutex;
767 struct mutex ln_lnd_mutex;
768 /* Have I called LNetNIInit myself? */
770 /* LNetNIInit/LNetNIFini counter */
772 /* shutdown in progress */
775 int ln_routing; /* am I a router? */
776 lnet_pid_t ln_pid; /* requested pid */
777 /* uniquely identifies this ni in this epoch */
778 __u64 ln_interface_cookie;
779 /* registered LNDs */
780 struct list_head ln_lnds;
782 /* test protocol compatibility flags */
783 int ln_testprotocompat;
785 /* 0 - load the NIs from the mod params
786 * 1 - do not load the NIs from the mod params
787 * Reverse logic to ensure that other calls to LNetNIInit
790 bool ln_nis_from_mod_params;
792 /* waitq for router checker. As long as there are no routes in
793 * the list, the router checker will sleep on this queue. when
794 * routes are added the thread will wake up */
795 wait_queue_head_t ln_rc_waitq;