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) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/include/lnet/lib-types.h
38 * Types used by the library side routines that do not need to be
39 * exposed to the user application
42 #ifndef __LNET_LIB_TYPES_H__
43 #define __LNET_LIB_TYPES_H__
45 #include "linux/lib-types.h"
47 #include "../libcfs/libcfs.h"
48 #include <linux/list.h>
51 #define WIRE_ATTR __attribute__((packed))
53 /* Packed version of lnet_process_id_t to transfer via network */
56 lnet_pid_t pid; /* node id / process id */
57 } WIRE_ATTR lnet_process_id_packed_t;
59 /* The wire handle's interface cookie only matches one network interface in
60 * one epoch (i.e. new cookie when the interface restarts or the node
61 * reboots). The object cookie only matches one object on that interface
62 * during that object's lifetime (i.e. no cookie re-use). */
64 __u64 wh_interface_cookie;
65 __u64 wh_object_cookie;
66 } WIRE_ATTR lnet_handle_wire_t;
76 /* The variant fields of the portals message header are aligned on an 8
77 * byte boundary in the message header. Note that all types used in these
78 * wire structs MUST be fixed size and the smaller types are placed at the
80 typedef struct lnet_ack {
81 lnet_handle_wire_t dst_wmd;
84 } WIRE_ATTR lnet_ack_t;
86 typedef struct lnet_put {
87 lnet_handle_wire_t ack_wmd;
92 } WIRE_ATTR lnet_put_t;
94 typedef struct lnet_get {
95 lnet_handle_wire_t return_wmd;
100 } WIRE_ATTR lnet_get_t;
102 typedef struct lnet_reply {
103 lnet_handle_wire_t dst_wmd;
104 } WIRE_ATTR lnet_reply_t;
106 typedef struct lnet_hello {
109 } WIRE_ATTR lnet_hello_t;
116 __u32 type; /* lnet_msg_type_t */
117 __u32 payload_length; /* payload data to follow */
118 /*<------__u64 aligned------->*/
126 } WIRE_ATTR lnet_hdr_t;
128 /* A HELLO message contains a magic number and protocol version
129 * code in the header's dest_nid, the peer's NID in the src_nid, and
130 * LNET_MSG_HELLO in the type field. All other common fields are zero
131 * (including payload_size; i.e. no payload).
132 * This is for use by byte-stream LNDs (e.g. TCP/IP) to check the peer is
133 * running the same protocol and to find out its NID. These LNDs should
134 * exchange HELLO messages when a connection is first established. Individual
135 * LNDs can put whatever else they fancy in lnet_hdr_t::msg.
138 __u32 magic; /* LNET_PROTO_TCP_MAGIC */
139 __u16 version_major; /* increment on incompatible change */
140 __u16 version_minor; /* increment on compatible change */
141 } WIRE_ATTR lnet_magicversion_t;
143 /* PROTO MAGIC for LNDs */
144 #define LNET_PROTO_IB_MAGIC 0x0be91b91
145 #define LNET_PROTO_RA_MAGIC 0x0be91b92
146 #define LNET_PROTO_QSW_MAGIC 0x0be91b93
147 #define LNET_PROTO_GNI_MAGIC 0xb00fbabe /* ask Kim */
148 #define LNET_PROTO_TCP_MAGIC 0xeebc0ded
149 #define LNET_PROTO_PTL_MAGIC 0x50746C4E /* 'PtlN' unique magic */
150 #define LNET_PROTO_MX_MAGIC 0x4d583130 /* 'MX10'! */
151 #define LNET_PROTO_ACCEPTOR_MAGIC 0xacce7100
152 #define LNET_PROTO_PING_MAGIC 0x70696E67 /* 'ping' */
154 /* Placeholder for a future "unified" protocol across all LNDs */
155 /* Current LNDs that receive a request with this magic will respond with a
156 * "stub" reply using their current protocol */
157 #define LNET_PROTO_MAGIC 0x45726963 /* ! */
159 #define LNET_PROTO_TCP_VERSION_MAJOR 1
160 #define LNET_PROTO_TCP_VERSION_MINOR 0
162 /* Acceptor connection request */
164 __u32 acr_magic; /* PTL_ACCEPTOR_PROTO_MAGIC */
165 __u32 acr_version; /* protocol version */
166 __u64 acr_nid; /* target NID */
167 } WIRE_ATTR lnet_acceptor_connreq_t;
169 #define LNET_PROTO_ACCEPTOR_VERSION 1
174 typedef struct lnet_msg {
175 struct list_head msg_activelist;
176 struct list_head msg_list; /* Q for credits/MD */
178 lnet_process_id_t msg_target;
179 /* where is it from, it's only for building event */
183 /* committed for sending */
184 unsigned int msg_tx_committed:1;
185 /* CPT # this message committed for sending */
186 unsigned int msg_tx_cpt:15;
187 /* committed for receiving */
188 unsigned int msg_rx_committed:1;
189 /* CPT # this message committed for receiving */
190 unsigned int msg_rx_cpt:15;
191 /* queued for tx credit */
192 unsigned int msg_tx_delayed:1;
193 /* queued for RX buffer */
194 unsigned int msg_rx_delayed:1;
195 /* ready for pending on RX delay list */
196 unsigned int msg_rx_ready_delay:1;
198 unsigned int msg_vmflush:1; /* VM trying to free memory */
199 unsigned int msg_target_is_router:1; /* sending to a router */
200 unsigned int msg_routing:1; /* being forwarded */
201 unsigned int msg_ack:1; /* ack on finalize (PUT) */
202 unsigned int msg_sending:1; /* outgoing message */
203 unsigned int msg_receiving:1; /* being received */
204 unsigned int msg_txcredit:1; /* taken an NI send credit */
205 unsigned int msg_peertxcredit:1; /* taken a peer send credit */
206 unsigned int msg_rtrcredit:1; /* taken a global router credit */
207 unsigned int msg_peerrtrcredit:1; /* taken a peer router credit */
208 unsigned int msg_onactivelist:1; /* on the activelist */
210 struct lnet_peer *msg_txpeer; /* peer I'm sending to */
211 struct lnet_peer *msg_rxpeer; /* peer I received from */
214 struct lnet_libmd *msg_md;
216 unsigned int msg_len;
217 unsigned int msg_wanted;
218 unsigned int msg_offset;
219 unsigned int msg_niov;
220 struct kvec *msg_iov;
221 lnet_kiov_t *msg_kiov;
227 typedef struct lnet_libhandle {
228 struct list_head lh_hash_chain;
232 #define lh_entry(ptr, type, member) \
233 ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
235 typedef struct lnet_eq {
236 struct list_head eq_list;
237 lnet_libhandle_t eq_lh;
238 lnet_seq_t eq_enq_seq;
239 lnet_seq_t eq_deq_seq;
240 unsigned int eq_size;
241 lnet_eq_handler_t eq_callback;
242 lnet_event_t *eq_events;
243 int **eq_refs; /* percpt refcount for EQ */
246 typedef struct lnet_me {
247 struct list_head me_list;
248 lnet_libhandle_t me_lh;
249 lnet_process_id_t me_match_id;
250 unsigned int me_portal;
251 unsigned int me_pos; /* hash offset in mt_hash */
253 __u64 me_ignore_bits;
254 lnet_unlink_t me_unlink;
255 struct lnet_libmd *me_md;
258 typedef struct lnet_libmd {
259 struct list_head md_list;
260 lnet_libhandle_t md_lh;
263 unsigned int md_offset;
264 unsigned int md_length;
265 unsigned int md_max_size;
268 unsigned int md_options;
269 unsigned int md_flags;
272 unsigned int md_niov; /* # frags */
274 struct kvec iov[LNET_MAX_IOV];
275 lnet_kiov_t kiov[LNET_MAX_IOV];
279 #define LNET_MD_FLAG_ZOMBIE (1 << 0)
280 #define LNET_MD_FLAG_AUTO_UNLINK (1 << 1)
281 #define LNET_MD_FLAG_ABORTED (1 << 2)
283 #ifdef LNET_USE_LIB_FREELIST
285 void *fl_objs; /* single contiguous array of objects */
286 int fl_nobjs; /* the number of them */
287 int fl_objsize; /* the size (including overhead) of each of them */
288 struct list_head fl_list; /* where they are enqueued */
292 struct list_head fo_list; /* enqueue on fl_list */
293 void *fo_contents; /* aligned contents */
298 /* info about peers we are trying to fail */
299 struct list_head tp_list; /* ln_test_peers */
300 lnet_nid_t tp_nid; /* matching nid */
301 unsigned int tp_threshold; /* # failures to simulate */
304 #define LNET_COOKIE_TYPE_MD 1
305 #define LNET_COOKIE_TYPE_ME 2
306 #define LNET_COOKIE_TYPE_EQ 3
307 #define LNET_COOKIE_TYPE_BITS 2
308 #define LNET_COOKIE_MASK ((1ULL << LNET_COOKIE_TYPE_BITS) - 1ULL)
310 struct lnet_ni; /* forward ref */
312 typedef struct lnet_lnd {
313 /* fields managed by portals */
314 struct list_head lnd_list; /* stash in the LND table */
315 int lnd_refcount; /* # active instances */
317 /* fields initialised by the LND */
318 unsigned int lnd_type;
320 int (*lnd_startup)(struct lnet_ni *ni);
321 void (*lnd_shutdown)(struct lnet_ni *ni);
322 int (*lnd_ctl)(struct lnet_ni *ni, unsigned int cmd, void *arg);
324 /* In data movement APIs below, payload buffers are described as a set
325 * of 'niov' fragments which are...
327 * in virtual memory (struct iovec *iov != NULL)
329 * in pages (kernel only: plt_kiov_t *kiov != NULL).
330 * The LND may NOT overwrite these fragment descriptors.
331 * An 'offset' and may specify a byte offset within the set of
332 * fragments to start from
335 /* Start sending a preformatted message. 'private' is NULL for PUT and
336 * GET messages; otherwise this is a response to an incoming message
337 * and 'private' is the 'private' passed to lnet_parse(). Return
338 * non-zero for immediate failure, otherwise complete later with
340 int (*lnd_send)(struct lnet_ni *ni, void *private, lnet_msg_t *msg);
342 /* Start receiving 'mlen' bytes of payload data, skipping the following
343 * 'rlen' - 'mlen' bytes. 'private' is the 'private' passed to
344 * lnet_parse(). Return non-zero for immediate failure, otherwise
345 * complete later with lnet_finalize(). This also gives back a receive
346 * credit if the LND does flow control. */
347 int (*lnd_recv)(struct lnet_ni *ni, void *private, lnet_msg_t *msg,
348 int delayed, unsigned int niov,
349 struct kvec *iov, lnet_kiov_t *kiov,
350 unsigned int offset, unsigned int mlen, unsigned int rlen);
352 /* lnet_parse() has had to delay processing of this message
353 * (e.g. waiting for a forwarding buffer or send credits). Give the
354 * LND a chance to free urgently needed resources. If called, return 0
355 * for success and do NOT give back a receive credit; that has to wait
356 * until lnd_recv() gets called. On failure return < 0 and
357 * release resources; lnd_recv() will not be called. */
358 int (*lnd_eager_recv)(struct lnet_ni *ni, void *private, lnet_msg_t *msg,
359 void **new_privatep);
361 /* notification of peer health */
362 void (*lnd_notify)(struct lnet_ni *ni, lnet_nid_t peer, int alive);
364 /* query of peer aliveness */
365 void (*lnd_query)(struct lnet_ni *ni, lnet_nid_t peer, unsigned long *when);
367 /* accept a new connection */
368 int (*lnd_accept)(struct lnet_ni *ni, struct socket *sock);
372 #define LNET_NI_STATUS_UP 0x15aac0de
373 #define LNET_NI_STATUS_DOWN 0xdeadface
374 #define LNET_NI_STATUS_INVALID 0x00000000
379 } WIRE_ATTR lnet_ni_status_t;
381 struct lnet_tx_queue {
382 int tq_credits; /* # tx credits free */
383 int tq_credits_min; /* lowest it's been */
384 int tq_credits_max; /* total # tx credits */
385 struct list_head tq_delayed; /* delayed TXs */
388 #define LNET_MAX_INTERFACES 16
390 typedef struct lnet_ni {
392 struct list_head ni_list; /* chain on ln_nis */
393 struct list_head ni_cptlist; /* chain on ln_nis_cpt */
394 int ni_maxtxcredits; /* # tx credits */
395 /* # per-peer send credits */
396 int ni_peertxcredits;
397 /* # per-peer router buffer credits */
398 int ni_peerrtrcredits;
399 /* seconds to consider peer dead */
401 int ni_ncpts; /* number of CPTs */
402 __u32 *ni_cpts; /* bond NI on some CPTs */
403 lnet_nid_t ni_nid; /* interface's NID */
404 void *ni_data; /* instance-specific data */
405 lnd_t *ni_lnd; /* procedural interface */
406 struct lnet_tx_queue **ni_tx_queues; /* percpt TX queues */
407 int **ni_refs; /* percpt reference count */
408 long ni_last_alive; /* when I was last alive */
409 lnet_ni_status_t *ni_status; /* my health status */
410 /* equivalent interfaces to use */
411 char *ni_interfaces[LNET_MAX_INTERFACES];
414 #define LNET_PROTO_PING_MATCHBITS 0x8000000000000000LL
416 /* NB: value of these features equal to LNET_PROTO_PING_VERSION_x
417 * of old LNet, so there shouldn't be any compatibility issue */
418 #define LNET_PING_FEAT_INVAL (0) /* no feature */
419 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
420 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
422 #define LNET_PING_FEAT_MASK (LNET_PING_FEAT_BASE | \
423 LNET_PING_FEAT_NI_STATUS)
430 lnet_ni_status_t pi_ni[0];
431 } WIRE_ATTR lnet_ping_info_t;
433 /* router checker data, per router */
434 #define LNET_MAX_RTR_NIS 16
435 #define LNET_PINGINFO_SIZE offsetof(lnet_ping_info_t, pi_ni[LNET_MAX_RTR_NIS])
437 /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */
438 struct list_head rcd_list;
439 lnet_handle_md_t rcd_mdh; /* ping buffer MD */
440 struct lnet_peer *rcd_gateway; /* reference to gateway */
441 lnet_ping_info_t *rcd_pinginfo; /* ping buffer */
444 typedef struct lnet_peer {
445 struct list_head lp_hashlist; /* chain on peer hash */
446 struct list_head lp_txq; /* messages blocking for tx credits */
447 struct list_head lp_rtrq; /* messages blocking for router credits */
448 struct list_head lp_rtr_list; /* chain on router list */
449 int lp_txcredits; /* # tx credits available */
450 int lp_mintxcredits; /* low water mark */
451 int lp_rtrcredits; /* # router credits */
452 int lp_minrtrcredits; /* low water mark */
453 unsigned int lp_alive:1; /* alive/dead? */
454 unsigned int lp_notify:1; /* notification outstanding? */
455 unsigned int lp_notifylnd:1; /* outstanding notification for LND? */
456 unsigned int lp_notifying:1; /* some thread is handling notification */
457 unsigned int lp_ping_notsent; /* SEND event outstanding from ping */
458 int lp_alive_count; /* # times router went dead<->alive */
459 long lp_txqnob; /* bytes queued for sending */
460 unsigned long lp_timestamp; /* time of last aliveness news */
461 unsigned long lp_ping_timestamp; /* time of last ping attempt */
462 unsigned long lp_ping_deadline; /* != 0 if ping reply expected */
463 unsigned long lp_last_alive; /* when I was last alive */
464 unsigned long lp_last_query; /* when lp_ni was queried last time */
465 lnet_ni_t *lp_ni; /* interface peer is on */
466 lnet_nid_t lp_nid; /* peer's NID */
467 int lp_refcount; /* # refs */
468 int lp_cpt; /* CPT this peer attached on */
469 /* # refs from lnet_route_t::lr_gateway */
471 /* returned RC ping features */
472 unsigned int lp_ping_feats;
473 struct list_head lp_routes; /* routers on this peer */
474 lnet_rc_data_t *lp_rcd; /* router checker state */
478 #define LNET_PEER_HASH_BITS 9
479 #define LNET_PEER_HASH_SIZE (1 << LNET_PEER_HASH_BITS)
481 /* peer hash table */
482 struct lnet_peer_table {
483 int pt_version; /* /proc validity stamp */
484 int pt_number; /* # peers extant */
485 struct list_head pt_deathrow; /* zombie peers */
486 struct list_head *pt_hash; /* NID->peer hash */
489 /* peer aliveness is enabled only on routers for peers in a network where the
490 * lnet_ni_t::ni_peertimeout has been set to a positive value */
491 #define lnet_peer_aliveness_enabled(lp) (the_lnet.ln_routing != 0 && \
492 (lp)->lp_ni->ni_peertimeout > 0)
495 struct list_head lr_list; /* chain on net */
496 struct list_head lr_gwlist; /* chain on gateway */
497 lnet_peer_t *lr_gateway; /* router node */
498 __u32 lr_net; /* remote network number */
499 int lr_seq; /* sequence for round-robin */
500 unsigned int lr_downis; /* number of down NIs */
501 unsigned int lr_hops; /* how far I am */
502 unsigned int lr_priority; /* route priority */
505 #define LNET_REMOTE_NETS_HASH_DEFAULT (1U << 7)
506 #define LNET_REMOTE_NETS_HASH_MAX (1U << 16)
507 #define LNET_REMOTE_NETS_HASH_SIZE (1 << the_lnet.ln_remote_nets_hbits)
510 struct list_head lrn_list; /* chain on ln_remote_nets_hash */
511 struct list_head lrn_routes; /* routes to me */
512 __u32 lrn_net; /* my net number */
516 struct list_head rbp_bufs; /* my free buffer pool */
517 struct list_head rbp_msgs; /* messages blocking for a buffer */
518 int rbp_npages; /* # pages in each buffer */
519 int rbp_nbuffers; /* # buffers */
520 int rbp_credits; /* # free buffers / blocked messages */
521 int rbp_mincredits; /* low water mark */
525 struct list_head rb_list; /* chain on rbp_bufs */
526 lnet_rtrbufpool_t *rb_pool; /* owning pool */
527 lnet_kiov_t rb_kiov[0]; /* the buffer space */
542 } WIRE_ATTR lnet_counters_t;
544 #define LNET_PEER_HASHSIZE 503 /* prime! */
546 #define LNET_NRBPOOLS 3 /* # different router buffer pools */
549 /* Didn't match anything */
550 LNET_MATCHMD_NONE = (1 << 0),
552 LNET_MATCHMD_OK = (1 << 1),
553 /* Must be discarded */
554 LNET_MATCHMD_DROP = (1 << 2),
555 /* match and buffer is exhausted */
556 LNET_MATCHMD_EXHAUSTED = (1 << 3),
558 LNET_MATCHMD_FINISH = (LNET_MATCHMD_OK | LNET_MATCHMD_DROP),
561 /* Options for lnet_portal_t::ptl_options */
562 #define LNET_PTL_LAZY (1 << 0)
563 #define LNET_PTL_MATCH_UNIQUE (1 << 1) /* unique match, for RDMA */
564 #define LNET_PTL_MATCH_WILDCARD (1 << 2) /* wildcard match, request portal */
566 /* parameter for matching operations (GET, PUT) */
567 struct lnet_match_info {
569 lnet_process_id_t mi_id;
571 unsigned int mi_portal;
572 unsigned int mi_rlength;
573 unsigned int mi_roffset;
576 /* ME hash of RDMA portal */
577 #define LNET_MT_HASH_BITS 8
578 #define LNET_MT_HASH_SIZE (1 << LNET_MT_HASH_BITS)
579 #define LNET_MT_HASH_MASK (LNET_MT_HASH_SIZE - 1)
580 /* we allocate (LNET_MT_HASH_SIZE + 1) entries for lnet_match_table::mt_hash,
581 * the last entry is reserved for MEs with ignore-bits */
582 #define LNET_MT_HASH_IGNORE LNET_MT_HASH_SIZE
583 /* __u64 has 2^6 bits, so need 2^(LNET_MT_HASH_BITS - LNET_MT_BITS_U64) which
584 * is 4 __u64s as bit-map, and add an extra __u64 (only use one bit) for the
585 * ME-list with ignore-bits, which is mtable::mt_hash[LNET_MT_HASH_IGNORE] */
586 #define LNET_MT_BITS_U64 6 /* 2^6 bits */
587 #define LNET_MT_EXHAUSTED_BITS (LNET_MT_HASH_BITS - LNET_MT_BITS_U64)
588 #define LNET_MT_EXHAUSTED_BMAP ((1 << LNET_MT_EXHAUSTED_BITS) + 1)
590 /* portal match table */
591 struct lnet_match_table {
592 /* reserved for upcoming patches, CPU partition ID */
594 unsigned int mt_portal; /* portal index */
595 /* match table is set as "enabled" if there's non-exhausted MD
596 * attached on mt_mhash, it's only valid for wildcard portal */
597 unsigned int mt_enabled;
598 /* bitmap to flag whether MEs on mt_hash are exhausted or not */
599 __u64 mt_exhausted[LNET_MT_EXHAUSTED_BMAP];
600 struct list_head *mt_mhash; /* matching hash */
603 /* these are only useful for wildcard portal */
604 /* Turn off message rotor for wildcard portals */
605 #define LNET_PTL_ROTOR_OFF 0
606 /* round-robin dispatch all PUT messages for wildcard portals */
607 #define LNET_PTL_ROTOR_ON 1
608 /* round-robin dispatch routed PUT message for wildcard portals */
609 #define LNET_PTL_ROTOR_RR_RT 2
610 /* dispatch routed PUT message by hashing source NID for wildcard portals */
611 #define LNET_PTL_ROTOR_HASH_RT 3
613 typedef struct lnet_portal {
615 unsigned int ptl_index; /* portal ID, reserved */
616 /* flags on this portal: lazy, unique... */
617 unsigned int ptl_options;
618 /* list of messages which are stealing buffer */
619 struct list_head ptl_msg_stealing;
620 /* messages blocking for MD */
621 struct list_head ptl_msg_delayed;
622 /* Match table for each CPT */
623 struct lnet_match_table **ptl_mtables;
624 /* spread rotor of incoming "PUT" */
625 unsigned int ptl_rotor;
626 /* # active entries for this portal */
628 /* array of active entries' cpu-partition-id */
632 #define LNET_LH_HASH_BITS 12
633 #define LNET_LH_HASH_SIZE (1ULL << LNET_LH_HASH_BITS)
634 #define LNET_LH_HASH_MASK (LNET_LH_HASH_SIZE - 1)
636 /* resource container (ME, MD, EQ) */
637 struct lnet_res_container {
638 unsigned int rec_type; /* container type */
639 __u64 rec_lh_cookie; /* cookie generator */
640 struct list_head rec_active; /* active resource list */
641 struct list_head *rec_lh_hash; /* handle hash */
642 #ifdef LNET_USE_LIB_FREELIST
643 lnet_freelist_t rec_freelist; /* freelist for resources */
647 /* message container */
648 struct lnet_msg_container {
649 int msc_init; /* initialized or not */
650 /* max # threads finalizing */
652 /* msgs waiting to complete finalizing */
653 struct list_head msc_finalizing;
654 struct list_head msc_active; /* active message list */
655 /* threads doing finalization */
656 void **msc_finalizers;
657 #ifdef LNET_USE_LIB_FREELIST
658 lnet_freelist_t msc_freelist; /* freelist for messages */
662 /* Router Checker states */
663 #define LNET_RC_STATE_SHUTDOWN 0 /* not started */
664 #define LNET_RC_STATE_RUNNING 1 /* started up OK */
665 #define LNET_RC_STATE_STOPPING 2 /* telling thread to stop */
668 /* CPU partition table of LNet */
669 struct cfs_cpt_table *ln_cpt_table;
670 /* number of CPTs in ln_cpt_table */
671 unsigned int ln_cpt_number;
672 unsigned int ln_cpt_bits;
674 /* protect LNet resources (ME/MD/EQ) */
675 struct cfs_percpt_lock *ln_res_lock;
678 /* the vector of portals */
679 lnet_portal_t **ln_portals;
680 /* percpt ME containers */
681 struct lnet_res_container **ln_me_containers;
682 /* percpt MD container */
683 struct lnet_res_container **ln_md_containers;
685 /* Event Queue container */
686 struct lnet_res_container ln_eq_container;
687 wait_queue_head_t ln_eq_waitq;
688 spinlock_t ln_eq_wait_lock;
689 unsigned int ln_remote_nets_hbits;
691 /* protect NI, peer table, credits, routers, rtrbuf... */
692 struct cfs_percpt_lock *ln_net_lock;
693 /* percpt message containers for active/finalizing/freed message */
694 struct lnet_msg_container **ln_msg_containers;
695 lnet_counters_t **ln_counters;
696 struct lnet_peer_table **ln_peer_tables;
697 /* failure simulation */
698 struct list_head ln_test_peers;
700 struct list_head ln_nis; /* LND instances */
701 /* NIs bond on specific CPT(s) */
702 struct list_head ln_nis_cpt;
703 /* dying LND instances */
704 struct list_head ln_nis_zombie;
705 lnet_ni_t *ln_loni; /* the loopback NI */
706 /* NI to wait for events in */
707 lnet_ni_t *ln_eq_waitni;
709 /* remote networks with routes to them */
710 struct list_head *ln_remote_nets_hash;
712 __u64 ln_remote_nets_version;
713 /* list of all known routers */
714 struct list_head ln_routers;
716 __u64 ln_routers_version;
717 /* percpt router buffer pools */
718 lnet_rtrbufpool_t **ln_rtrpools;
720 lnet_handle_md_t ln_ping_target_md;
721 lnet_handle_eq_t ln_ping_target_eq;
722 lnet_ping_info_t *ln_ping_info;
724 /* router checker startup/shutdown state */
726 /* router checker's event queue */
727 lnet_handle_eq_t ln_rc_eqh;
728 /* rcd still pending on net */
729 struct list_head ln_rcd_deathrow;
730 /* rcd ready for free */
731 struct list_head ln_rcd_zombie;
732 /* serialise startup/shutdown */
733 struct semaphore ln_rc_signal;
735 struct mutex ln_api_mutex;
736 struct mutex ln_lnd_mutex;
737 int ln_init; /* LNetInit() called? */
738 /* Have I called LNetNIInit myself? */
740 /* LNetNIInit/LNetNIFini counter */
742 /* shutdown in progress */
745 int ln_routing; /* am I a router? */
746 lnet_pid_t ln_pid; /* requested pid */
747 /* uniquely identifies this ni in this epoch */
748 __u64 ln_interface_cookie;
749 /* registered LNDs */
750 struct list_head ln_lnds;
752 /* space for network names */
753 char *ln_network_tokens;
754 int ln_network_tokens_nob;
755 /* test protocol compatibility flags */
756 int ln_testprotocompat;