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
  42 #include "types.h"
  43 #include "lnetctl.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         unsigned int    msg_rdma_get:1;
  92
  93         struct lnet_peer        *msg_txpeer;     /* peer I'm sending to */
  94         struct lnet_peer        *msg_rxpeer;     /* peer I received from */
  95
  96         void                    *msg_private;
  97         struct lnet_libmd       *msg_md;
  98
  99         unsigned int             msg_len;
 100         unsigned int             msg_wanted;
 101         unsigned int             msg_offset;
 102         unsigned int             msg_niov;
 103         struct kvec             *msg_iov;
 104         lnet_kiov_t             *msg_kiov;
 105
 106         lnet_event_t             msg_ev;
 107         lnet_hdr_t               msg_hdr;
 108 } lnet_msg_t;
 109
 110 typedef struct lnet_libhandle {
 111         struct list_head        lh_hash_chain;
 112         __u64                   lh_cookie;
 113 } lnet_libhandle_t;
 114
 115 #define lh_entry(ptr, type, member) \
 116         ((type *)((char *)(ptr) - (char *)(&((type *)0)->member)))
 117
 118 typedef struct lnet_eq {
 119         struct list_head          eq_list;
 120         lnet_libhandle_t          eq_lh;
 121         lnet_seq_t                eq_enq_seq;
 122         lnet_seq_t                eq_deq_seq;
 123         unsigned int              eq_size;
 124         lnet_eq_handler_t         eq_callback;
 125         lnet_event_t             *eq_events;
 126         int                     **eq_refs;      /* percpt refcount for EQ */
 127 } lnet_eq_t;
 128
 129 typedef struct lnet_me {
 130         struct list_head         me_list;
 131         lnet_libhandle_t         me_lh;
 132         lnet_process_id_t        me_match_id;
 133         unsigned int             me_portal;
 134         unsigned int             me_pos;        /* hash offset in mt_hash */
 135         __u64                    me_match_bits;
 136         __u64                    me_ignore_bits;
 137         lnet_unlink_t            me_unlink;
 138         struct lnet_libmd       *me_md;
 139 } lnet_me_t;
 140
 141 typedef struct lnet_libmd {
 142         struct list_head         md_list;
 143         lnet_libhandle_t         md_lh;
 144         lnet_me_t               *md_me;
 145         char                    *md_start;
 146         unsigned int             md_offset;
 147         unsigned int             md_length;
 148         unsigned int             md_max_size;
 149         int                      md_threshold;
 150         int                      md_refcount;
 151         unsigned int             md_options;
 152         unsigned int             md_flags;
 153         void                    *md_user_ptr;
 154         lnet_eq_t               *md_eq;
 155         unsigned int             md_niov;       /* # frags */
 156         union {
 157                 struct kvec     iov[LNET_MAX_IOV];
 158                 lnet_kiov_t     kiov[LNET_MAX_IOV];
 159         } md_iov;
 160 } lnet_libmd_t;
 161
 162 #define LNET_MD_FLAG_ZOMBIE             (1 << 0)
 163 #define LNET_MD_FLAG_AUTO_UNLINK        (1 << 1)
 164 #define LNET_MD_FLAG_ABORTED            (1 << 2)
 165
 166 typedef struct {
 167         /* info about peers we are trying to fail */
 168         struct list_head        tp_list;        /* ln_test_peers */
 169         lnet_nid_t              tp_nid;         /* matching nid */
 170         unsigned int            tp_threshold;   /* # failures to simulate */
 171 } lnet_test_peer_t;
 172
 173 #define LNET_COOKIE_TYPE_MD     1
 174 #define LNET_COOKIE_TYPE_ME     2
 175 #define LNET_COOKIE_TYPE_EQ     3
 176 #define LNET_COOKIE_TYPE_BITS   2
 177 #define LNET_COOKIE_MASK        ((1ULL << LNET_COOKIE_TYPE_BITS) - 1ULL)
 178
 179 struct lnet_ni;                 /* forward ref */
 180
 181 typedef struct lnet_lnd {
 182         /* fields managed by portals */
 183         struct list_head        lnd_list;       /* stash in the LND table */
 184         int                     lnd_refcount;   /* # active instances */
 185
 186         /* fields initialised by the LND */
 187         __u32                   lnd_type;
 188
 189         int  (*lnd_startup)(struct lnet_ni *ni);
 190         void (*lnd_shutdown)(struct lnet_ni *ni);
 191         int  (*lnd_ctl)(struct lnet_ni *ni, unsigned int cmd, void *arg);
 192
 193         /*
 194          * In data movement APIs below, payload buffers are described as a set
 195          * of 'niov' fragments which are...
 196          * EITHER
 197          *    in virtual memory (struct iovec *iov != NULL)
 198          * OR
 199          *    in pages (kernel only: plt_kiov_t *kiov != NULL).
 200          * The LND may NOT overwrite these fragment descriptors.
 201          * An 'offset' and may specify a byte offset within the set of
 202          * fragments to start from
 203          */
 204
 205         /*
 206          * Start sending a preformatted message.  'private' is NULL for PUT and
 207          * GET messages; otherwise this is a response to an incoming message
 208          * and 'private' is the 'private' passed to lnet_parse().  Return
 209          * non-zero for immediate failure, otherwise complete later with
 210          * lnet_finalize()
 211          */
 212         int (*lnd_send)(struct lnet_ni *ni, void *private, lnet_msg_t *msg);
 213
 214         /*
 215          * Start receiving 'mlen' bytes of payload data, skipping the following
 216          * 'rlen' - 'mlen' bytes. 'private' is the 'private' passed to
 217          * lnet_parse().  Return non-zero for immediate failure, otherwise
 218          * complete later with lnet_finalize().  This also gives back a receive
 219          * credit if the LND does flow control.
 220          */
 221         int (*lnd_recv)(struct lnet_ni *ni, void *private, lnet_msg_t *msg,
 222                         int delayed, unsigned int niov,
 223                         struct kvec *iov, lnet_kiov_t *kiov,
 224                         unsigned int offset, unsigned int mlen,
 225                         unsigned int rlen);
 226
 227         /*
 228          * lnet_parse() has had to delay processing of this message
 229          * (e.g. waiting for a forwarding buffer or send credits).  Give the
 230          * LND a chance to free urgently needed resources.  If called, return 0
 231          * for success and do NOT give back a receive credit; that has to wait
 232          * until lnd_recv() gets called.  On failure return < 0 and
 233          * release resources; lnd_recv() will not be called.
 234          */
 235         int (*lnd_eager_recv)(struct lnet_ni *ni, void *private,
 236                               lnet_msg_t *msg, void **new_privatep);
 237
 238         /* notification of peer health */
 239         void (*lnd_notify)(struct lnet_ni *ni, lnet_nid_t peer, int alive);
 240
 241         /* query of peer aliveness */
 242         void (*lnd_query)(struct lnet_ni *ni, lnet_nid_t peer,
 243                           unsigned long *when);
 244
 245         /* accept a new connection */
 246         int (*lnd_accept)(struct lnet_ni *ni, struct socket *sock);
 247 } lnd_t;
 248
 249 struct lnet_tx_queue {
 250         int                     tq_credits;     /* # tx credits free */
 251         int                     tq_credits_min; /* lowest it's been */
 252         int                     tq_credits_max; /* total # tx credits */
 253         struct list_head        tq_delayed;     /* delayed TXs */
 254 };
 255
 256 typedef struct lnet_ni {
 257         spinlock_t                ni_lock;
 258         struct list_head          ni_list;      /* chain on ln_nis */
 259         struct list_head          ni_cptlist;   /* chain on ln_nis_cpt */
 260         int                       ni_maxtxcredits; /* # tx credits  */
 261         /* # per-peer send credits */
 262         int                       ni_peertxcredits;
 263         /* # per-peer router buffer credits */
 264         int                       ni_peerrtrcredits;
 265         /* seconds to consider peer dead */
 266         int                       ni_peertimeout;
 267         int                       ni_ncpts;     /* number of CPTs */
 268         __u32                    *ni_cpts;      /* bond NI on some CPTs */
 269         lnet_nid_t                ni_nid;       /* interface's NID */
 270         void                     *ni_data;      /* instance-specific data */
 271         lnd_t                    *ni_lnd;       /* procedural interface */
 272         struct lnet_tx_queue    **ni_tx_queues; /* percpt TX queues */
 273         int                     **ni_refs;      /* percpt reference count */
 274         time64_t                  ni_last_alive;/* when I was last alive */
 275         lnet_ni_status_t         *ni_status;    /* my health status */
 276         /* equivalent interfaces to use */
 277         char                     *ni_interfaces[LNET_MAX_INTERFACES];
 278 } lnet_ni_t;
 279
 280 #define LNET_PROTO_PING_MATCHBITS       0x8000000000000000LL
 281
 282 /*
 283  * NB: value of these features equal to LNET_PROTO_PING_VERSION_x
 284  * of old LNet, so there shouldn't be any compatibility issue
 285  */
 286 #define LNET_PING_FEAT_INVAL            (0)             /* no feature */
 287 #define LNET_PING_FEAT_BASE             (1 << 0)        /* just a ping */
 288 #define LNET_PING_FEAT_NI_STATUS        (1 << 1)        /* return NI status */
 289 #define LNET_PING_FEAT_RTE_DISABLED     (1 << 2)        /* Routing enabled */
 290
 291 #define LNET_PING_FEAT_MASK             (LNET_PING_FEAT_BASE | \
 292                                          LNET_PING_FEAT_NI_STATUS)
 293
 294 /* router checker data, per router */
 295 #define LNET_MAX_RTR_NIS   16
 296 #define LNET_PINGINFO_SIZE offsetof(lnet_ping_info_t, pi_ni[LNET_MAX_RTR_NIS])
 297 typedef struct {
 298         /* chain on the_lnet.ln_zombie_rcd or ln_deathrow_rcd */
 299         struct list_head         rcd_list;
 300         lnet_handle_md_t         rcd_mdh;       /* ping buffer MD */
 301         struct lnet_peer        *rcd_gateway;   /* reference to gateway */
 302         lnet_ping_info_t        *rcd_pinginfo;  /* ping buffer */
 303 } lnet_rc_data_t;
 304
 305 typedef struct lnet_peer {
 306         struct list_head         lp_hashlist;   /* chain on peer hash */
 307         struct list_head         lp_txq;        /* messages blocking for
 308                                                    tx credits */
 309         struct list_head         lp_rtrq;       /* messages blocking for
 310                                                    router credits */
 311         struct list_head         lp_rtr_list;   /* chain on router list */
 312         int                      lp_txcredits;  /* # tx credits available */
 313         int                      lp_mintxcredits;  /* low water mark */
 314         int                      lp_rtrcredits;    /* # router credits */
 315         int                      lp_minrtrcredits; /* low water mark */
 316         unsigned int             lp_alive:1;       /* alive/dead? */
 317         unsigned int             lp_notify:1;   /* notification outstanding? */
 318         unsigned int             lp_notifylnd:1;/* outstanding notification
 319                                                    for LND? */
 320         unsigned int             lp_notifying:1; /* some thread is handling
 321                                                     notification */
 322         unsigned int             lp_ping_notsent;/* SEND event outstanding
 323                                                     from ping */
 324         int                      lp_alive_count; /* # times router went
 325                                                     dead<->alive */
 326         long                     lp_txqnob;      /* bytes queued for sending */
 327         unsigned long            lp_timestamp;   /* time of last aliveness
 328                                                     news */
 329         unsigned long            lp_ping_timestamp;/* time of last ping
 330                                                       attempt */
 331         unsigned long            lp_ping_deadline; /* != 0 if ping reply
 332                                                       expected */
 333         unsigned long            lp_last_alive; /* when I was last alive */
 334         unsigned long            lp_last_query; /* when lp_ni was queried
 335                                                    last time */
 336         lnet_ni_t               *lp_ni;         /* interface peer is on */
 337         lnet_nid_t               lp_nid;        /* peer's NID */
 338         int                      lp_refcount;   /* # refs */
 339         int                      lp_cpt;        /* CPT this peer attached on */
 340         /* # refs from lnet_route_t::lr_gateway */
 341         int                      lp_rtr_refcount;
 342         /* returned RC ping features */
 343         unsigned int             lp_ping_feats;
 344         struct list_head         lp_routes;     /* routers on this peer */
 345         lnet_rc_data_t          *lp_rcd;        /* router checker state */
 346 } lnet_peer_t;
 347
 348 /* peer hash size */
 349 #define LNET_PEER_HASH_BITS     9
 350 #define LNET_PEER_HASH_SIZE     (1 << LNET_PEER_HASH_BITS)
 351
 352 /* peer hash table */
 353 struct lnet_peer_table {
 354         int                      pt_version;    /* /proc validity stamp */
 355         int                      pt_number;     /* # peers extant */
 356         /* # zombies to go to deathrow (and not there yet) */
 357         int                      pt_zombies;
 358         struct list_head         pt_deathrow;   /* zombie peers */
 359         struct list_head        *pt_hash;       /* NID->peer hash */
 360 };
 361
 362 /*
 363  * peer aliveness is enabled only on routers for peers in a network where the
 364  * lnet_ni_t::ni_peertimeout has been set to a positive value
 365  */
 366 #define lnet_peer_aliveness_enabled(lp) (the_lnet.ln_routing && \
 367                                          (lp)->lp_ni->ni_peertimeout > 0)
 368
 369 typedef struct {
 370         struct list_head         lr_list;       /* chain on net */
 371         struct list_head         lr_gwlist;     /* chain on gateway */
 372         lnet_peer_t             *lr_gateway;    /* router node */
 373         __u32                    lr_net;        /* remote network number */
 374         int                      lr_seq;        /* sequence for round-robin */
 375         unsigned int             lr_downis;     /* number of down NIs */
 376         __u32                    lr_hops;       /* how far I am */
 377         unsigned int             lr_priority;   /* route priority */
 378 } lnet_route_t;
 379
 380 #define LNET_REMOTE_NETS_HASH_DEFAULT   (1U << 7)
 381 #define LNET_REMOTE_NETS_HASH_MAX       (1U << 16)
 382 #define LNET_REMOTE_NETS_HASH_SIZE      (1 << the_lnet.ln_remote_nets_hbits)
 383
 384 typedef struct {
 385         struct list_head        lrn_list;       /* chain on
 386                                                    ln_remote_nets_hash */
 387         struct list_head        lrn_routes;     /* routes to me */
 388         __u32                   lrn_net;        /* my net number */
 389 } lnet_remotenet_t;
 390
 391 /** lnet message has credit and can be submitted to lnd for send/receive */
 392 #define LNET_CREDIT_OK          0
 393 /** lnet message is waiting for credit */
 394 #define LNET_CREDIT_WAIT        1
 395
 396 typedef struct {
 397         struct list_head        rbp_bufs;       /* my free buffer pool */
 398         struct list_head        rbp_msgs;       /* messages blocking
 399                                                    for a buffer */
 400         int                     rbp_npages;     /* # pages in each buffer */
 401         /* requested number of buffers */
 402         int                     rbp_req_nbuffers;
 403         /* # buffers actually allocated */
 404         int                     rbp_nbuffers;
 405         int                     rbp_credits;    /* # free buffers /
 406                                                      blocked messages */
 407         int                     rbp_mincredits; /* low water mark */
 408 } lnet_rtrbufpool_t;
 409
 410 typedef struct {
 411         struct list_head         rb_list;       /* chain on rbp_bufs */
 412         lnet_rtrbufpool_t       *rb_pool;       /* owning pool */
 413         lnet_kiov_t              rb_kiov[0];    /* the buffer space */
 414 } lnet_rtrbuf_t;
 415
 416 #define LNET_PEER_HASHSIZE      503     /* prime! */
 417
 418 #define LNET_TINY_BUF_IDX       0
 419 #define LNET_SMALL_BUF_IDX      1
 420 #define LNET_LARGE_BUF_IDX      2
 421
 422 /* # different router buffer pools */
 423 #define LNET_NRBPOOLS           (LNET_LARGE_BUF_IDX + 1)
 424
 425 enum {
 426         /* Didn't match anything */
 427         LNET_MATCHMD_NONE       = (1 << 0),
 428         /* Matched OK */
 429         LNET_MATCHMD_OK         = (1 << 1),
 430         /* Must be discarded */
 431         LNET_MATCHMD_DROP       = (1 << 2),
 432         /* match and buffer is exhausted */
 433         LNET_MATCHMD_EXHAUSTED  = (1 << 3),
 434         /* match or drop */
 435         LNET_MATCHMD_FINISH     = (LNET_MATCHMD_OK | LNET_MATCHMD_DROP),
 436 };
 437
 438 /* Options for lnet_portal_t::ptl_options */
 439 #define LNET_PTL_LAZY           (1 << 0)
 440 #define LNET_PTL_MATCH_UNIQUE   (1 << 1)        /* unique match, for RDMA */
 441 #define LNET_PTL_MATCH_WILDCARD (1 << 2)        /* wildcard match,
 442                                                    request portal */
 443
 444 /* parameter for matching operations (GET, PUT) */
 445 struct lnet_match_info {
 446         __u64                   mi_mbits;
 447         lnet_process_id_t       mi_id;
 448         unsigned int            mi_opc;
 449         unsigned int            mi_portal;
 450         unsigned int            mi_rlength;
 451         unsigned int            mi_roffset;
 452 };
 453
 454 /* ME hash of RDMA portal */
 455 #define LNET_MT_HASH_BITS               8
 456 #define LNET_MT_HASH_SIZE               (1 << LNET_MT_HASH_BITS)
 457 #define LNET_MT_HASH_MASK               (LNET_MT_HASH_SIZE - 1)
 458 /*
 459  * we allocate (LNET_MT_HASH_SIZE + 1) entries for lnet_match_table::mt_hash,
 460  * the last entry is reserved for MEs with ignore-bits
 461  */
 462 #define LNET_MT_HASH_IGNORE             LNET_MT_HASH_SIZE
 463 /*
 464  * __u64 has 2^6 bits, so need 2^(LNET_MT_HASH_BITS - LNET_MT_BITS_U64) which
 465  * is 4 __u64s as bit-map, and add an extra __u64 (only use one bit) for the
 466  * ME-list with ignore-bits, which is mtable::mt_hash[LNET_MT_HASH_IGNORE]
 467  */
 468 #define LNET_MT_BITS_U64                6       /* 2^6 bits */
 469 #define LNET_MT_EXHAUSTED_BITS          (LNET_MT_HASH_BITS - LNET_MT_BITS_U64)
 470 #define LNET_MT_EXHAUSTED_BMAP          ((1 << LNET_MT_EXHAUSTED_BITS) + 1)
 471
 472 /* portal match table */
 473 struct lnet_match_table {
 474         /* reserved for upcoming patches, CPU partition ID */
 475         unsigned int             mt_cpt;
 476         unsigned int             mt_portal;     /* portal index */
 477         /*
 478          * match table is set as "enabled" if there's non-exhausted MD
 479          * attached on mt_mhash, it's only valid for wildcard portal
 480          */
 481         unsigned int             mt_enabled;
 482         /* bitmap to flag whether MEs on mt_hash are exhausted or not */
 483         __u64                    mt_exhausted[LNET_MT_EXHAUSTED_BMAP];
 484         struct list_head        *mt_mhash;      /* matching hash */
 485 };
 486
 487 /* these are only useful for wildcard portal */
 488 /* Turn off message rotor for wildcard portals */
 489 #define LNET_PTL_ROTOR_OFF      0
 490 /* round-robin dispatch all PUT messages for wildcard portals */
 491 #define LNET_PTL_ROTOR_ON       1
 492 /* round-robin dispatch routed PUT message for wildcard portals */
 493 #define LNET_PTL_ROTOR_RR_RT    2
 494 /* dispatch routed PUT message by hashing source NID for wildcard portals */
 495 #define LNET_PTL_ROTOR_HASH_RT  3
 496
 497 typedef struct lnet_portal {
 498         spinlock_t                ptl_lock;
 499         unsigned int              ptl_index;    /* portal ID, reserved */
 500         /* flags on this portal: lazy, unique... */
 501         unsigned int              ptl_options;
 502         /* list of messages which are stealing buffer */
 503         struct list_head          ptl_msg_stealing;
 504         /* messages blocking for MD */
 505         struct list_head          ptl_msg_delayed;
 506         /* Match table for each CPT */
 507         struct lnet_match_table **ptl_mtables;
 508         /* spread rotor of incoming "PUT" */
 509         unsigned int              ptl_rotor;
 510         /* # active entries for this portal */
 511         int                       ptl_mt_nmaps;
 512         /* array of active entries' cpu-partition-id */
 513         int                       ptl_mt_maps[0];
 514 } lnet_portal_t;
 515
 516 #define LNET_LH_HASH_BITS       12
 517 #define LNET_LH_HASH_SIZE       (1ULL << LNET_LH_HASH_BITS)
 518 #define LNET_LH_HASH_MASK       (LNET_LH_HASH_SIZE - 1)
 519
 520 /* resource container (ME, MD, EQ) */
 521 struct lnet_res_container {
 522         unsigned int             rec_type;      /* container type */
 523         __u64                    rec_lh_cookie; /* cookie generator */
 524         struct list_head         rec_active;    /* active resource list */
 525         struct list_head        *rec_lh_hash;   /* handle hash */
 526 };
 527
 528 /* message container */
 529 struct lnet_msg_container {
 530         int                       msc_init;     /* initialized or not */
 531         /* max # threads finalizing */
 532         int                       msc_nfinalizers;
 533         /* msgs waiting to complete finalizing */
 534         struct list_head          msc_finalizing;
 535         struct list_head          msc_active;   /* active message list */
 536         /* threads doing finalization */
 537         void                    **msc_finalizers;
 538 };
 539
 540 /* Router Checker states */
 541 #define LNET_RC_STATE_SHUTDOWN          0       /* not started */
 542 #define LNET_RC_STATE_RUNNING           1       /* started up OK */
 543 #define LNET_RC_STATE_STOPPING          2       /* telling thread to stop */
 544
 545 typedef struct {
 546         /* CPU partition table of LNet */
 547         struct cfs_cpt_table             *ln_cpt_table;
 548         /* number of CPTs in ln_cpt_table */
 549         unsigned int                      ln_cpt_number;
 550         unsigned int                      ln_cpt_bits;
 551
 552         /* protect LNet resources (ME/MD/EQ) */
 553         struct cfs_percpt_lock           *ln_res_lock;
 554         /* # portals */
 555         int                               ln_nportals;
 556         /* the vector of portals */
 557         lnet_portal_t                   **ln_portals;
 558         /* percpt ME containers */
 559         struct lnet_res_container       **ln_me_containers;
 560         /* percpt MD container */
 561         struct lnet_res_container       **ln_md_containers;
 562
 563         /* Event Queue container */
 564         struct lnet_res_container         ln_eq_container;
 565         wait_queue_head_t                 ln_eq_waitq;
 566         spinlock_t                        ln_eq_wait_lock;
 567         unsigned int                      ln_remote_nets_hbits;
 568
 569         /* protect NI, peer table, credits, routers, rtrbuf... */
 570         struct cfs_percpt_lock           *ln_net_lock;
 571         /* percpt message containers for active/finalizing/freed message */
 572         struct lnet_msg_container       **ln_msg_containers;
 573         lnet_counters_t                 **ln_counters;
 574         struct lnet_peer_table          **ln_peer_tables;
 575         /* failure simulation */
 576         struct list_head                  ln_test_peers;
 577         struct list_head                  ln_drop_rules;
 578         struct list_head                  ln_delay_rules;
 579
 580         struct list_head                  ln_nis;       /* LND instances */
 581         /* NIs bond on specific CPT(s) */
 582         struct list_head                  ln_nis_cpt;
 583         /* dying LND instances */
 584         struct list_head                  ln_nis_zombie;
 585         lnet_ni_t                        *ln_loni;      /* the loopback NI */
 586
 587         /* remote networks with routes to them */
 588         struct list_head                 *ln_remote_nets_hash;
 589         /* validity stamp */
 590         __u64                             ln_remote_nets_version;
 591         /* list of all known routers */
 592         struct list_head                  ln_routers;
 593         /* validity stamp */
 594         __u64                             ln_routers_version;
 595         /* percpt router buffer pools */
 596         lnet_rtrbufpool_t               **ln_rtrpools;
 597
 598         lnet_handle_md_t                  ln_ping_target_md;
 599         lnet_handle_eq_t                  ln_ping_target_eq;
 600         lnet_ping_info_t                 *ln_ping_info;
 601
 602         /* router checker startup/shutdown state */
 603         int                               ln_rc_state;
 604         /* router checker's event queue */
 605         lnet_handle_eq_t                  ln_rc_eqh;
 606         /* rcd still pending on net */
 607         struct list_head                  ln_rcd_deathrow;
 608         /* rcd ready for free */
 609         struct list_head                  ln_rcd_zombie;
 610         /* serialise startup/shutdown */
 611         struct semaphore                  ln_rc_signal;
 612
 613         struct mutex                      ln_api_mutex;
 614         struct mutex                      ln_lnd_mutex;
 615         struct mutex                      ln_delay_mutex;
 616         /* Have I called LNetNIInit myself? */
 617         int                               ln_niinit_self;
 618         /* LNetNIInit/LNetNIFini counter */
 619         int                               ln_refcount;
 620         /* shutdown in progress */
 621         int                               ln_shutdown;
 622
 623         int                               ln_routing;   /* am I a router? */
 624         lnet_pid_t                        ln_pid;       /* requested pid */
 625         /* uniquely identifies this ni in this epoch */
 626         __u64                             ln_interface_cookie;
 627         /* registered LNDs */
 628         struct list_head                  ln_lnds;
 629
 630         /* test protocol compatibility flags */
 631         int                               ln_testprotocompat;
 632
 633         /*
 634          * 0 - load the NIs from the mod params
 635          * 1 - do not load the NIs from the mod params
 636          * Reverse logic to ensure that other calls to LNetNIInit
 637          * need no change
 638          */
 639         bool                              ln_nis_from_mod_params;
 640
 641         /*
 642          * waitq for router checker.  As long as there are no routes in
 643          * the list, the router checker will sleep on this queue.  when
 644          * routes are added the thread will wake up
 645          */
 646         wait_queue_head_t                 ln_rc_waitq;
 647
 648 } lnet_t;
 649
 650 #endif