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 <uapi/linux/lnet/lnet-dlc.h>
50 #include <uapi/linux/lnet/lnetctl.h>
52 /* Max payload size */
53 #ifndef CONFIG_LNET_MAX_PAYLOAD
54 # error "CONFIG_LNET_MAX_PAYLOAD must be defined in config.h"
57 #define LNET_MAX_PAYLOAD CONFIG_LNET_MAX_PAYLOAD
58 #if (LNET_MAX_PAYLOAD < LNET_MTU)
59 # error "LNET_MAX_PAYLOAD too small - error in configure --with-max-payload-mb"
60 #elif (LNET_MAX_PAYLOAD > (PAGE_SIZE * LNET_MAX_IOV))
61 # error "LNET_MAX_PAYLOAD too large - error in configure --with-max-payload-mb"
67 typedef struct lnet_msg {
68 struct list_head msg_activelist;
69 struct list_head msg_list; /* Q for credits/MD */
71 struct lnet_process_id msg_target;
72 /* Primary NID of the source. */
73 lnet_nid_t msg_initiator;
74 /* where is it from, it's only for building event */
78 /* committed for sending */
79 unsigned int msg_tx_committed:1;
80 /* CPT # this message committed for sending */
81 unsigned int msg_tx_cpt:15;
82 /* committed for receiving */
83 unsigned int msg_rx_committed:1;
84 /* CPT # this message committed for receiving */
85 unsigned int msg_rx_cpt:15;
86 /* queued for tx credit */
87 unsigned int msg_tx_delayed:1;
88 /* queued for RX buffer */
89 unsigned int msg_rx_delayed:1;
90 /* ready for pending on RX delay list */
91 unsigned int msg_rx_ready_delay:1;
93 unsigned int msg_vmflush:1; /* VM trying to free memory */
94 unsigned int msg_target_is_router:1; /* sending to a router */
95 unsigned int msg_routing:1; /* being forwarded */
96 unsigned int msg_ack:1; /* ack on finalize (PUT) */
97 unsigned int msg_sending:1; /* outgoing message */
98 unsigned int msg_receiving:1; /* being received */
99 unsigned int msg_txcredit:1; /* taken an NI send credit */
100 unsigned int msg_peertxcredit:1; /* taken a peer send credit */
101 unsigned int msg_rtrcredit:1; /* taken a globel router credit */
102 unsigned int msg_peerrtrcredit:1; /* taken a peer router credit */
103 unsigned int msg_onactivelist:1; /* on the activelist */
104 unsigned int msg_rdma_get:1;
106 struct lnet_peer_ni *msg_txpeer; /* peer I'm sending to */
107 struct lnet_peer_ni *msg_rxpeer; /* peer I received from */
110 struct lnet_libmd *msg_md;
111 /* the NI the message was sent or received over */
112 struct lnet_ni *msg_txni;
113 struct lnet_ni *msg_rxni;
115 unsigned int msg_len;
116 unsigned int msg_wanted;
117 unsigned int msg_offset;
118 unsigned int msg_niov;
119 struct kvec *msg_iov;
120 lnet_kiov_t *msg_kiov;
122 struct lnet_event msg_ev;
123 struct lnet_hdr msg_hdr;
126 typedef struct lnet_libhandle {
127 struct list_head lh_hash_chain;
131 #define lh_entry(ptr, type, member) \
132 ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
134 typedef struct lnet_eq {
135 struct list_head eq_list;
136 struct lnet_libhandle eq_lh;
137 unsigned long eq_enq_seq;
138 unsigned long eq_deq_seq;
139 unsigned int eq_size;
140 lnet_eq_handler_t eq_callback;
141 struct lnet_event *eq_events;
142 int **eq_refs; /* percpt refcount for EQ */
145 typedef struct lnet_me {
146 struct list_head me_list;
147 struct lnet_libhandle me_lh;
148 struct lnet_process_id me_match_id;
149 unsigned int me_portal;
150 unsigned int me_pos; /* hash offset in mt_hash */
152 __u64 me_ignore_bits;
153 enum lnet_unlink me_unlink;
154 struct lnet_libmd *me_md;
157 typedef struct lnet_libmd {
158 struct list_head md_list;
159 struct lnet_libhandle md_lh;
160 struct lnet_me *md_me;
162 unsigned int md_offset;
163 unsigned int md_length;
164 unsigned int md_max_size;
167 unsigned int md_options;
168 unsigned int md_flags;
169 unsigned int md_niov; /* # frags at end of struct */
171 struct lnet_eq *md_eq;
172 struct lnet_handle_md md_bulk_handle;
174 struct kvec iov[LNET_MAX_IOV];
175 lnet_kiov_t kiov[LNET_MAX_IOV];
179 #define LNET_MD_FLAG_ZOMBIE (1 << 0)
180 #define LNET_MD_FLAG_AUTO_UNLINK (1 << 1)
181 #define LNET_MD_FLAG_ABORTED (1 << 2)
183 typedef struct lnet_test_peer {
184 /* info about peers we are trying to fail */
185 struct list_head tp_list; /* ln_test_peers */
186 lnet_nid_t tp_nid; /* matching nid */
187 unsigned int tp_threshold; /* # failures to simulate */
190 #define LNET_COOKIE_TYPE_MD 1
191 #define LNET_COOKIE_TYPE_ME 2
192 #define LNET_COOKIE_TYPE_EQ 3
193 #define LNET_COOKIE_TYPE_BITS 2
194 #define LNET_COOKIE_MASK ((1ULL << LNET_COOKIE_TYPE_BITS) - 1ULL)
196 struct lnet_ni; /* forward ref */
199 typedef struct lnet_lnd {
200 /* fields managed by portals */
201 struct list_head lnd_list; /* stash in the LND table */
202 int lnd_refcount; /* # active instances */
204 /* fields initialized by the LND */
207 int (*lnd_startup)(struct lnet_ni *ni);
208 void (*lnd_shutdown)(struct lnet_ni *ni);
209 int (*lnd_ctl)(struct lnet_ni *ni, unsigned int cmd, void *arg);
211 /* In data movement APIs below, payload buffers are described as a set
212 * of 'niov' fragments which are...
214 * in virtual memory (struct kvec *iov != NULL)
216 * in pages (kernel only: plt_kiov_t *kiov != NULL).
217 * The LND may NOT overwrite these fragment descriptors.
218 * An 'offset' and may specify a byte offset within the set of
219 * fragments to start from
222 /* Start sending a preformatted message. 'private' is NULL for PUT and
223 * GET messages; otherwise this is a response to an incoming message
224 * and 'private' is the 'private' passed to lnet_parse(). Return
225 * non-zero for immediate failure, otherwise complete later with
227 int (*lnd_send)(struct lnet_ni *ni, void *private,
228 struct lnet_msg *msg);
230 /* Start receiving 'mlen' bytes of payload data, skipping the following
231 * 'rlen' - 'mlen' bytes. 'private' is the 'private' passed to
232 * lnet_parse(). Return non-zero for immedaite failure, otherwise
233 * complete later with lnet_finalize(). This also gives back a receive
234 * credit if the LND does flow control. */
235 int (*lnd_recv)(struct lnet_ni *ni, void *private, struct lnet_msg *msg,
236 int delayed, unsigned int niov,
237 struct kvec *iov, lnet_kiov_t *kiov,
238 unsigned int offset, unsigned int mlen, unsigned int rlen);
240 /* lnet_parse() has had to delay processing of this message
241 * (e.g. waiting for a forwarding buffer or send credits). Give the
242 * LND a chance to free urgently needed resources. If called, return 0
243 * for success and do NOT give back a receive credit; that has to wait
244 * until lnd_recv() gets called. On failure return < 0 and
245 * release resources; lnd_recv() will not be called. */
246 int (*lnd_eager_recv)(struct lnet_ni *ni, void *private,
247 struct lnet_msg *msg, void **new_privatep);
249 /* notification of peer health */
250 void (*lnd_notify)(struct lnet_ni *ni, lnet_nid_t peer, int alive);
252 /* query of peer aliveness */
253 void (*lnd_query)(struct lnet_ni *ni, lnet_nid_t peer, cfs_time_t *when);
255 /* accept a new connection */
256 int (*lnd_accept)(struct lnet_ni *ni, struct socket *sock);
259 typedef struct lnet_ni_status {
263 } WIRE_ATTR lnet_ni_status_t;
265 struct lnet_tx_queue {
266 int tq_credits; /* # tx credits free */
267 int tq_credits_min; /* lowest it's been */
268 int tq_credits_max; /* total # tx credits */
269 struct list_head tq_delayed; /* delayed TXs */
272 enum lnet_net_state {
273 /* set when net block is allocated */
274 LNET_NET_STATE_INIT = 0,
275 /* set when NIs in net are started successfully */
276 LNET_NET_STATE_ACTIVE,
277 /* set if all NIs in net are in FAILED state */
278 LNET_NET_STATE_INACTIVE,
279 /* set when shutting down a NET */
280 LNET_NET_STATE_DELETING
284 /* set when NI block is allocated */
285 LNET_NI_STATE_INIT = 0,
286 /* set when NI is started successfully */
287 LNET_NI_STATE_ACTIVE,
288 /* set when LND notifies NI failed */
289 LNET_NI_STATE_FAILED,
290 /* set when LND notifies NI degraded */
291 LNET_NI_STATE_DEGRADED,
292 /* set when shuttding down NI */
293 LNET_NI_STATE_DELETING
296 struct lnet_element_stats {
303 /* chain on the ln_nets */
304 struct list_head net_list;
306 /* net ID, which is composed of
307 * (net_type << 16) | net_num.
308 * net_type can be one of the enumerated types defined in
309 * lnet/include/lnet/nidstr.h */
312 /* priority of the network */
315 /* total number of CPTs in the array */
318 /* cumulative CPTs of all NIs in this net */
321 /* network tunables */
322 struct lnet_ioctl_config_lnd_cmn_tunables net_tunables;
325 * boolean to indicate that the tunables have been set and
328 bool net_tunables_set;
330 /* procedural interface */
331 struct lnet_lnd *net_lnd;
333 /* list of NIs on this net */
334 struct list_head net_ni_list;
336 /* list of NIs being added, but not started yet */
337 struct list_head net_ni_added;
339 /* dying LND instances */
340 struct list_head net_ni_zombie;
343 enum lnet_net_state net_state;
346 typedef struct lnet_ni {
347 /* chain on the lnet_net structure */
348 struct list_head ni_netlist;
350 /* chain on net_ni_cpt */
351 struct list_head ni_cptlist;
358 /* bond NI on some CPTs */
361 /* interface's NID */
364 /* instance-specific data */
368 atomic_t ni_tx_credits;
370 /* percpt TX queues */
371 struct lnet_tx_queue **ni_tx_queues;
373 /* percpt reference count */
376 /* when I was last alive */
379 /* pointer to parent network */
380 struct lnet_net *ni_net;
382 /* my health status */
383 struct lnet_ni_status *ni_status;
386 enum lnet_ni_state ni_state;
388 /* per NI LND tunables */
389 struct lnet_lnd_tunables ni_lnd_tunables;
391 /* lnd tunables set explicitly */
392 bool ni_lnd_tunables_set;
395 struct lnet_element_stats ni_stats;
397 /* physical device CPT */
400 /* sequence number used to round robin over nis within a net */
404 * equivalent interfaces to use
405 * This is an array because socklnd bonding can still be configured
407 char *ni_interfaces[LNET_INTERFACES_NUM];
408 struct net *ni_net_ns; /* original net namespace */
411 #define LNET_PROTO_PING_MATCHBITS 0x8000000000000000LL
413 /* NB: value of these features equal to LNET_PROTO_PING_VERSION_x
414 * of old LNet, so there shouldn't be any compatibility issue */
415 #define LNET_PING_FEAT_INVAL (0) /* no feature */
416 #define LNET_PING_FEAT_BASE (1 << 0) /* just a ping */
417 #define LNET_PING_FEAT_NI_STATUS (1 << 1) /* return NI status */
418 #define LNET_PING_FEAT_RTE_DISABLED (1 << 2) /* Routing enabled */
420 typedef struct lnet_ping_info {
425 struct lnet_ni_status pi_ni[0];
426 } WIRE_ATTR lnet_ping_info_t;
428 #define LNET_PING_INFO_SIZE(NNIDS) \
429 offsetof(struct lnet_ping_info, pi_ni[NNIDS])
430 #define LNET_PING_INFO_LONI(PINFO) ((PINFO)->pi_ni[0].ns_nid)
431 #define LNET_PING_INFO_SEQNO(PINFO) ((PINFO)->pi_ni[0].ns_status)
434 * Descriptor of a ping info buffer: keep a separate indicator of the
435 * size and a reference count. The type is used both as a source and
436 * sink of data, so we need to keep some information outside of the
437 * area that may be overwritten by network data.
439 struct lnet_ping_buffer {
442 struct lnet_ping_info pb_info;
445 #define LNET_PING_BUFFER_SIZE(NNIDS) \
446 offsetof(struct lnet_ping_buffer, pb_info.pi_ni[NNIDS])
447 #define LNET_PING_BUFFER_LONI(PBUF) ((PBUF)->pb_info.pi_ni[0].ns_nid)
448 #define LNET_PING_BUFFER_SEQNO(PBUF) ((PBUF)->pb_info.pi_ni[0].ns_status)
451 /* router checker data, per router */
452 typedef struct lnet_rc_data {
453 /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */
454 struct list_head rcd_list;
455 struct lnet_handle_md rcd_mdh; /* ping buffer MD */
456 struct lnet_peer_ni *rcd_gateway; /* reference to gateway */
457 struct lnet_ping_buffer *rcd_pingbuffer;/* ping buffer */
458 int rcd_nnis; /* desired size of buffer */
461 struct lnet_peer_ni {
462 /* chain on peer_net */
463 struct list_head lpni_on_peer_net_list;
464 /* chain on remote peer list */
465 struct list_head lpni_on_remote_peer_ni_list;
466 /* chain on peer hash */
467 struct list_head lpni_hashlist;
468 /* messages blocking for tx credits */
469 struct list_head lpni_txq;
470 /* messages blocking for router credits */
471 struct list_head lpni_rtrq;
472 /* chain on router list */
473 struct list_head lpni_rtr_list;
474 /* pointer to peer net I'm part of */
475 struct lnet_peer_net *lpni_peer_net;
476 /* statistics kept on each peer NI */
477 struct lnet_element_stats lpni_stats;
478 /* spin lock protecting credits and lpni_txq / lpni_rtrq */
479 spinlock_t lpni_lock;
480 /* # tx credits available */
483 int lpni_mintxcredits;
484 /* # router credits */
487 int lpni_minrtrcredits;
488 /* bytes queued for sending */
492 /* notification outstanding? */
494 /* outstanding notification for LND? */
496 /* some thread is handling notification */
498 /* SEND event outstanding from ping */
499 bool lpni_ping_notsent;
500 /* # times router went dead<->alive. Protected with lpni_lock */
501 int lpni_alive_count;
502 /* time of last aliveness news */
503 cfs_time_t lpni_timestamp;
504 /* time of last ping attempt */
505 cfs_time_t lpni_ping_timestamp;
506 /* != 0 if ping reply expected */
507 cfs_time_t lpni_ping_deadline;
508 /* when I was last alive */
509 cfs_time_t lpni_last_alive;
510 /* when lpni_ni was queried last time */
511 cfs_time_t lpni_last_query;
512 /* network peer is on */
513 struct lnet_net *lpni_net;
517 atomic_t lpni_refcount;
518 /* CPT this peer attached on */
520 /* # refs from lnet_route_t::lr_gateway */
521 int lpni_rtr_refcount;
522 /* sequence number used to round robin over peer nis within a net */
524 /* sequence number used to round robin over gateways */
528 /* returned RC ping features. Protected with lpni_lock */
529 unsigned int lpni_ping_feats;
530 /* routes on this peer */
531 struct list_head lpni_routes;
532 /* array of preferred local nids */
533 lnet_nid_t *lpni_pref_nids;
534 /* number of preferred NIDs in lnpi_pref_nids */
535 __u32 lpni_pref_nnids;
536 /* router checker state */
537 struct lnet_rc_data *lpni_rcd;
541 /* chain on global peer list */
542 struct list_head lp_on_lnet_peer_list;
544 /* list of peer nets */
545 struct list_head lp_peer_nets;
547 /* primary NID of the peer */
548 lnet_nid_t lp_primary_nid;
550 /* peer is Multi-Rail enabled peer */
554 struct lnet_peer_net {
555 /* chain on peer block */
556 struct list_head lpn_on_peer_list;
558 /* list of peer_nis on this network */
559 struct list_head lpn_peer_nis;
561 /* pointer to the peer I'm part of */
562 struct lnet_peer *lpn_peer;
569 #define LNET_PEER_HASH_BITS 9
570 #define LNET_PEER_HASH_SIZE (1 << LNET_PEER_HASH_BITS)
572 /* peer hash table */
573 struct lnet_peer_table {
574 int pt_version; /* /proc validity stamp */
575 atomic_t pt_number; /* # peers extant */
576 struct list_head *pt_hash; /* NID->peer hash */
577 struct list_head pt_zombie_list; /* zombie peers */
578 int pt_zombies; /* # zombie peers */
579 spinlock_t pt_zombie_lock; /* protect list and count */
582 /* peer aliveness is enabled only on routers for peers in a network where the
583 * struct lnet_ni::ni_peertimeout has been set to a positive value
585 #define lnet_peer_aliveness_enabled(lp) (the_lnet.ln_routing != 0 && \
586 ((lp)->lpni_net) && \
587 (lp)->lpni_net->net_tunables.lct_peer_timeout > 0)
589 typedef struct lnet_route {
590 struct list_head lr_list; /* chain on net */
591 struct list_head lr_gwlist; /* chain on gateway */
592 struct lnet_peer_ni *lr_gateway; /* router node */
593 __u32 lr_net; /* remote network number */
594 int lr_seq; /* sequence for round-robin */
595 unsigned int lr_downis; /* number of down NIs */
596 __u32 lr_hops; /* how far I am */
597 unsigned int lr_priority; /* route priority */
600 #define LNET_REMOTE_NETS_HASH_DEFAULT (1U << 7)
601 #define LNET_REMOTE_NETS_HASH_MAX (1U << 16)
602 #define LNET_REMOTE_NETS_HASH_SIZE (1 << the_lnet.ln_remote_nets_hbits)
604 typedef struct lnet_remotenet {
605 /* chain on ln_remote_nets_hash */
606 struct list_head lrn_list;
608 struct list_head lrn_routes;
613 /** lnet message has credit and can be submitted to lnd for send/receive */
614 #define LNET_CREDIT_OK 0
615 /** lnet message is waiting for credit */
616 #define LNET_CREDIT_WAIT 1
618 typedef struct lnet_rtrbufpool {
619 /* my free buffer pool */
620 struct list_head rbp_bufs;
621 /* messages blocking for a buffer */
622 struct list_head rbp_msgs;
623 /* # pages in each buffer */
625 /* requested number of buffers */
626 int rbp_req_nbuffers;
627 /* # buffers actually allocated */
629 /* # free buffers / blocked messages */
635 typedef struct lnet_rtrbuf {
636 struct list_head rb_list; /* chain on rbp_bufs */
637 struct lnet_rtrbufpool *rb_pool; /* owning pool */
638 lnet_kiov_t rb_kiov[0]; /* the buffer space */
641 #define LNET_PEER_HASHSIZE 503 /* prime! */
643 enum lnet_match_flags {
644 /* Didn't match anything */
645 LNET_MATCHMD_NONE = (1 << 0),
647 LNET_MATCHMD_OK = (1 << 1),
648 /* Must be discarded */
649 LNET_MATCHMD_DROP = (1 << 2),
650 /* match and buffer is exhausted */
651 LNET_MATCHMD_EXHAUSTED = (1 << 3),
653 LNET_MATCHMD_FINISH = (LNET_MATCHMD_OK | LNET_MATCHMD_DROP),
656 /* Options for struct lnet_portal::ptl_options */
657 #define LNET_PTL_LAZY (1 << 0)
658 #define LNET_PTL_MATCH_UNIQUE (1 << 1) /* unique match, for RDMA */
659 #define LNET_PTL_MATCH_WILDCARD (1 << 2) /* wildcard match, request portal */
661 /* parameter for matching operations (GET, PUT) */
662 struct lnet_match_info {
664 struct lnet_process_id mi_id;
667 unsigned int mi_portal;
668 unsigned int mi_rlength;
669 unsigned int mi_roffset;
672 /* ME hash of RDMA portal */
673 #define LNET_MT_HASH_BITS 8
674 #define LNET_MT_HASH_SIZE (1 << LNET_MT_HASH_BITS)
675 #define LNET_MT_HASH_MASK (LNET_MT_HASH_SIZE - 1)
676 /* we allocate (LNET_MT_HASH_SIZE + 1) entries for lnet_match_table::mt_hash,
677 * the last entry is reserved for MEs with ignore-bits */
678 #define LNET_MT_HASH_IGNORE LNET_MT_HASH_SIZE
679 /* __u64 has 2^6 bits, so need 2^(LNET_MT_HASH_BITS - LNET_MT_BITS_U64) which
680 * is 4 __u64s as bit-map, and add an extra __u64 (only use one bit) for the
681 * ME-list with ignore-bits, which is mtable::mt_hash[LNET_MT_HASH_IGNORE] */
682 #define LNET_MT_BITS_U64 6 /* 2^6 bits */
683 #define LNET_MT_EXHAUSTED_BITS (LNET_MT_HASH_BITS - LNET_MT_BITS_U64)
684 #define LNET_MT_EXHAUSTED_BMAP ((1 << LNET_MT_EXHAUSTED_BITS) + 1)
686 /* portal match table */
687 struct lnet_match_table {
688 /* reserved for upcoming patches, CPU partition ID */
690 unsigned int mt_portal; /* portal index */
691 /* match table is set as "enabled" if there's non-exhausted MD
692 * attached on mt_mhash, it's only valid for wildcard portal */
693 unsigned int mt_enabled;
694 /* bitmap to flag whether MEs on mt_hash are exhausted or not */
695 __u64 mt_exhausted[LNET_MT_EXHAUSTED_BMAP];
696 struct list_head *mt_mhash; /* matching hash */
699 /* these are only useful for wildcard portal */
700 /* Turn off message rotor for wildcard portals */
701 #define LNET_PTL_ROTOR_OFF 0
702 /* round-robin dispatch all PUT messages for wildcard portals */
703 #define LNET_PTL_ROTOR_ON 1
704 /* round-robin dispatch routed PUT message for wildcard portals */
705 #define LNET_PTL_ROTOR_RR_RT 2
706 /* dispatch routed PUT message by hashing source NID for wildcard portals */
707 #define LNET_PTL_ROTOR_HASH_RT 3
709 typedef struct lnet_portal {
711 unsigned int ptl_index; /* portal ID, reserved */
712 /* flags on this portal: lazy, unique... */
713 unsigned int ptl_options;
714 /* list of messages which are stealing buffer */
715 struct list_head ptl_msg_stealing;
716 /* messages blocking for MD */
717 struct list_head ptl_msg_delayed;
718 /* Match table for each CPT */
719 struct lnet_match_table **ptl_mtables;
720 /* spread rotor of incoming "PUT" */
721 unsigned int ptl_rotor;
722 /* # active entries for this portal */
724 /* array of active entries' cpu-partition-id */
728 #define LNET_LH_HASH_BITS 12
729 #define LNET_LH_HASH_SIZE (1ULL << LNET_LH_HASH_BITS)
730 #define LNET_LH_HASH_MASK (LNET_LH_HASH_SIZE - 1)
732 /* resource container (ME, MD, EQ) */
733 struct lnet_res_container {
734 unsigned int rec_type; /* container type */
735 __u64 rec_lh_cookie; /* cookie generator */
736 struct list_head rec_active; /* active resource list */
737 struct list_head *rec_lh_hash; /* handle hash */
740 /* message container */
741 struct lnet_msg_container {
742 int msc_init; /* initialized or not */
743 /* max # threads finalizing */
745 /* msgs waiting to complete finalizing */
746 struct list_head msc_finalizing;
747 struct list_head msc_active; /* active message list */
748 /* threads doing finalization */
749 void **msc_finalizers;
752 /* Router Checker states */
753 #define LNET_RC_STATE_SHUTDOWN 0 /* not started */
754 #define LNET_RC_STATE_RUNNING 1 /* started up OK */
755 #define LNET_RC_STATE_STOPPING 2 /* telling thread to stop */
758 #define LNET_STATE_SHUTDOWN 0 /* not started */
759 #define LNET_STATE_RUNNING 1 /* started up OK */
760 #define LNET_STATE_STOPPING 2 /* telling thread to stop */
762 typedef struct lnet {
763 /* CPU partition table of LNet */
764 struct cfs_cpt_table *ln_cpt_table;
765 /* number of CPTs in ln_cpt_table */
766 unsigned int ln_cpt_number;
767 unsigned int ln_cpt_bits;
769 /* protect LNet resources (ME/MD/EQ) */
770 struct cfs_percpt_lock *ln_res_lock;
773 /* the vector of portals */
774 struct lnet_portal **ln_portals;
775 /* percpt ME containers */
776 struct lnet_res_container **ln_me_containers;
777 /* percpt MD container */
778 struct lnet_res_container **ln_md_containers;
780 /* Event Queue container */
781 struct lnet_res_container ln_eq_container;
782 wait_queue_head_t ln_eq_waitq;
783 spinlock_t ln_eq_wait_lock;
785 unsigned int ln_remote_nets_hbits;
787 /* protect NI, peer table, credits, routers, rtrbuf... */
788 struct cfs_percpt_lock *ln_net_lock;
789 /* percpt message containers for active/finalizing/freed message */
790 struct lnet_msg_container **ln_msg_containers;
791 struct lnet_counters **ln_counters;
792 struct lnet_peer_table **ln_peer_tables;
793 /* list of configured or discovered peers */
794 struct list_head ln_peers;
795 /* list of peer nis not on a local network */
796 struct list_head ln_remote_peer_ni_list;
797 /* failure simulation */
798 struct list_head ln_test_peers;
799 struct list_head ln_drop_rules;
800 struct list_head ln_delay_rules;
802 struct list_head ln_nets;
803 /* the loopback NI */
804 struct lnet_ni *ln_loni;
805 /* network zombie list */
806 struct list_head ln_net_zombie;
808 /* remote networks with routes to them */
809 struct list_head *ln_remote_nets_hash;
811 __u64 ln_remote_nets_version;
812 /* list of all known routers */
813 struct list_head ln_routers;
815 __u64 ln_routers_version;
816 /* percpt router buffer pools */
817 struct lnet_rtrbufpool **ln_rtrpools;
820 * Ping target / Push source
822 * The ping target and push source share a single buffer. The
823 * ln_ping_target is protected against concurrent updates by
826 struct lnet_handle_md ln_ping_target_md;
827 struct lnet_handle_eq ln_ping_target_eq;
828 struct lnet_ping_buffer *ln_ping_target;
829 atomic_t ln_ping_target_seqno;
831 /* router checker startup/shutdown state */
833 /* router checker's event queue */
834 struct lnet_handle_eq ln_rc_eqh;
835 /* rcd still pending on net */
836 struct list_head ln_rcd_deathrow;
837 /* rcd ready for free */
838 struct list_head ln_rcd_zombie;
839 /* serialise startup/shutdown */
840 struct semaphore ln_rc_signal;
842 struct mutex ln_api_mutex;
843 struct mutex ln_lnd_mutex;
844 /* Have I called LNetNIInit myself? */
846 /* LNetNIInit/LNetNIFini counter */
848 /* SHUTDOWN/RUNNING/STOPPING */
851 int ln_routing; /* am I a router? */
852 lnet_pid_t ln_pid; /* requested pid */
853 /* uniquely identifies this ni in this epoch */
854 __u64 ln_interface_cookie;
855 /* registered LNDs */
856 struct list_head ln_lnds;
858 /* test protocol compatibility flags */
859 int ln_testprotocompat;
861 /* 0 - load the NIs from the mod params
862 * 1 - do not load the NIs from the mod params
863 * Reverse logic to ensure that other calls to LNetNIInit
866 bool ln_nis_from_mod_params;
868 /* waitq for router checker. As long as there are no routes in
869 * the list, the router checker will sleep on this queue. when
870 * routes are added the thread will wake up */
871 wait_queue_head_t ln_rc_waitq;