lnet/lnet/router_proc.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
   5  *
   6  *   This file is part of Portals
   7  *   http://sourceforge.net/projects/sandiaportals/
   8  *
   9  *   Portals is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Portals is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Portals; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LNET
  25 #include <libcfs/libcfs.h>
  26 #include <lnet/lib-lnet.h>
  27
  28 #if defined(__KERNEL__) && defined(LNET_ROUTER)
  29
  30 /* this is really lnet_proc.c */
  31
  32 static cfs_sysctl_table_header_t *lnet_table_header = NULL;
  33
  34 #ifndef HAVE_SYSCTL_UNNUMBERED
  35 #define CTL_LNET         (0x100)
  36 enum {
  37         PSDEV_LNET_STATS = 100,
  38         PSDEV_LNET_ROUTES,
  39         PSDEV_LNET_ROUTERS,
  40         PSDEV_LNET_PEERS,
  41         PSDEV_LNET_BUFFERS,
  42         PSDEV_LNET_NIS,
  43 };
  44 #else
  45 #define CTL_LNET           CTL_UNNUMBERED
  46 #define PSDEV_LNET_STATS   CTL_UNNUMBERED
  47 #define PSDEV_LNET_ROUTES  CTL_UNNUMBERED
  48 #define PSDEV_LNET_ROUTERS CTL_UNNUMBERED
  49 #define PSDEV_LNET_PEERS   CTL_UNNUMBERED
  50 #define PSDEV_LNET_BUFFERS CTL_UNNUMBERED
  51 #define PSDEV_LNET_NIS     CTL_UNNUMBERED
  52 #endif
  53
  54 static int __proc_lnet_stats(void *data, int write,
  55                              loff_t pos, void *buffer, int nob)
  56 {
  57         int              rc;
  58         lnet_counters_t *ctrs;
  59         int              len;
  60         char            *tmpstr;
  61         const int        tmpsiz = 256; /* 7 %u and 4 LPU64 */
  62
  63         if (write) {
  64                 LNET_LOCK();
  65                 memset(&the_lnet.ln_counters, 0, sizeof(the_lnet.ln_counters));
  66                 LNET_UNLOCK();
  67                 return 0;
  68         }
  69
  70         /* read */
  71
  72         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  73         if (ctrs == NULL)
  74                 return -ENOMEM;
  75
  76         LIBCFS_ALLOC(tmpstr, tmpsiz);
  77         if (tmpstr == NULL) {
  78                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
  79                 return -ENOMEM;
  80         }
  81
  82         LNET_LOCK();
  83         *ctrs = the_lnet.ln_counters;
  84         LNET_UNLOCK();
  85
  86         len = snprintf(tmpstr, tmpsiz,
  87                        "%u %u %u %u %u %u %u "LPU64" "LPU64" "
  88                        LPU64" "LPU64,
  89                        ctrs->msgs_alloc, ctrs->msgs_max,
  90                        ctrs->errors,
  91                        ctrs->send_count, ctrs->recv_count,
  92                        ctrs->route_count, ctrs->drop_count,
  93                        ctrs->send_length, ctrs->recv_length,
  94                        ctrs->route_length, ctrs->drop_length);
  95
  96         if (pos >= min_t(int, len, strlen(tmpstr)))
  97                 rc = 0;
  98         else
  99                 rc = trace_copyout_string(buffer, nob,
 100                                           tmpstr + pos, "\n");
 101
 102         LIBCFS_FREE(tmpstr, tmpsiz);
 103         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 104         return rc;
 105 }
 106
 107 DECLARE_PROC_HANDLER(proc_lnet_stats);
 108
 109 int LL_PROC_PROTO(proc_lnet_routes)
 110 {
 111         int        rc     = 0;
 112         char      *tmpstr;
 113         char      *s;
 114         const int  tmpsiz = 256;
 115         int        len;
 116         int       *ver_p  = (unsigned int *)(&filp->private_data);
 117
 118         DECLARE_LL_PROC_PPOS_DECL;
 119
 120         LASSERT (!write);
 121
 122         if (*lenp == 0)
 123                 return 0;
 124
 125         LIBCFS_ALLOC(tmpstr, tmpsiz);
 126         if (tmpstr == NULL)
 127                 return -ENOMEM;
 128
 129         s = tmpstr; /* points to current position in tmpstr[] */
 130
 131         if (*ppos == 0) {
 132                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 133                               the_lnet.ln_routing ? "enabled" : "disabled");
 134                 LASSERT (tmpstr + tmpsiz - s > 0);
 135
 136                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %7s %s\n",
 137                               "net", "hops", "state", "router");
 138                 LASSERT (tmpstr + tmpsiz - s > 0);
 139
 140                 LNET_LOCK();
 141                 *ver_p = (unsigned int)the_lnet.ln_remote_nets_version;
 142                 LNET_UNLOCK();
 143         } else {
 144                 struct list_head  *n;
 145                 struct list_head  *r;
 146                 lnet_route_t      *route = NULL;
 147                 lnet_remotenet_t  *rnet  = NULL;
 148                 int                skip  = *ppos - 1;
 149
 150                 LNET_LOCK();
 151
 152                 if (*ver_p != (unsigned int)the_lnet.ln_remote_nets_version) {
 153                         LNET_UNLOCK();
 154                         LIBCFS_FREE(tmpstr, tmpsiz);
 155                         return -ESTALE;
 156                 }
 157
 158                 n = the_lnet.ln_remote_nets.next;
 159
 160                 while (n != &the_lnet.ln_remote_nets && route == NULL) {
 161                         rnet = list_entry(n, lnet_remotenet_t, lrn_list);
 162
 163                         r = rnet->lrn_routes.next;
 164
 165                         while (r != &rnet->lrn_routes) {
 166                                 lnet_route_t *re = list_entry(r, lnet_route_t,
 167                                                               lr_list);
 168                                 if (skip == 0) {
 169                                         route = re;
 170                                         break;
 171                                 }
 172
 173                                 skip--;
 174                                 r = r->next;
 175                         }
 176
 177                         n = n->next;
 178                 }
 179
 180                 if (route != NULL) {
 181                         __u32        net   = rnet->lrn_net;
 182                         unsigned int hops  = route->lr_hops;
 183                         lnet_nid_t   nid   = route->lr_gateway->lp_nid;
 184                         int          alive = route->lr_gateway->lp_alive;
 185
 186                         s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4u %7s %s\n",
 187                                       libcfs_net2str(net), hops,
 188                                       alive ? "up" : "down", libcfs_nid2str(nid));
 189                         LASSERT (tmpstr + tmpsiz - s > 0);
 190                 }
 191
 192                 LNET_UNLOCK();
 193         }
 194
 195         len = s - tmpstr;     /* how many bytes was written */
 196
 197         if (len > *lenp) {    /* linux-supplied buffer is too small */
 198                 rc = -EINVAL;
 199         } else if (len > 0) { /* wrote something */
 200                 if (copy_to_user(buffer, tmpstr, len))
 201                         rc = -EFAULT;
 202                 else
 203                         *ppos += 1;
 204         }
 205
 206         LIBCFS_FREE(tmpstr, tmpsiz);
 207
 208         if (rc == 0)
 209                 *lenp = len;
 210
 211         return rc;
 212 }
 213
 214 int LL_PROC_PROTO(proc_lnet_routers)
 215 {
 216         int        rc = 0;
 217         char      *tmpstr;
 218         char      *s;
 219         const int  tmpsiz = 256;
 220         int        len;
 221         int       *ver_p = (unsigned int *)(&filp->private_data);
 222
 223         DECLARE_LL_PROC_PPOS_DECL;
 224
 225         LASSERT (!write);
 226
 227         if (*lenp == 0)
 228                 return 0;
 229
 230         LIBCFS_ALLOC(tmpstr, tmpsiz);
 231         if (tmpstr == NULL)
 232                 return -ENOMEM;
 233
 234         s = tmpstr; /* points to current position in tmpstr[] */
 235
 236         if (*ppos == 0) {
 237                 s += snprintf(s, tmpstr + tmpsiz - s,
 238                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 239                               "ref", "rtr_ref", "alive_cnt", "state", "last_ping",
 240                               "ping_sent", "deadline", "down_ni", "router");
 241                 LASSERT (tmpstr + tmpsiz - s > 0);
 242
 243                 LNET_LOCK();
 244                 *ver_p = (unsigned int)the_lnet.ln_routers_version;
 245                 LNET_UNLOCK();
 246         } else {
 247                 struct list_head  *r;
 248                 lnet_peer_t       *peer = NULL;
 249                 int                skip = *ppos - 1;
 250
 251                 LNET_LOCK();
 252
 253                 if (*ver_p != (unsigned int)the_lnet.ln_routers_version) {
 254                         LNET_UNLOCK();
 255                         LIBCFS_FREE(tmpstr, tmpsiz);
 256                         return -ESTALE;
 257                 }
 258
 259                 r = the_lnet.ln_routers.next;
 260
 261                 while (r != &the_lnet.ln_routers) {
 262                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 263                                                      lp_rtr_list);
 264
 265                         if (skip == 0) {
 266                                 peer = lp;
 267                                 break;
 268                         }
 269
 270                         skip--;
 271                         r = r->next;
 272                 }
 273
 274                 if (peer != NULL) {
 275                         lnet_nid_t nid = peer->lp_nid;
 276                         cfs_time_t now = cfs_time_current();
 277                         cfs_time_t deadline = peer->lp_ping_deadline;
 278                         int nrefs     = peer->lp_refcount;
 279                         int nrtrrefs  = peer->lp_rtr_refcount;
 280                         int alive_cnt = peer->lp_alive_count;
 281                         int alive     = peer->lp_alive;
 282                         int pingsent  = !peer->lp_ping_notsent;
 283                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 284                                                      peer->lp_ping_timestamp));
 285                         int down_ni   = lnet_router_down_ni(peer,
 286                                                     LNET_NIDNET(LNET_NID_ANY));
 287
 288                         if (deadline == 0)
 289                                 s += snprintf(s, tmpstr + tmpsiz - s,
 290                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 291                                               nrefs, nrtrrefs, alive_cnt,
 292                                               alive ? "up" : "down", last_ping,
 293                                               pingsent, "NA", down_ni,
 294                                               libcfs_nid2str(nid));
 295                         else
 296                                 s += snprintf(s, tmpstr + tmpsiz - s,
 297                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 298                                               nrefs, nrtrrefs, alive_cnt,
 299                                               alive ? "up" : "down", last_ping,
 300                                               pingsent,
 301                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 302                                               down_ni, libcfs_nid2str(nid));
 303                         LASSERT (tmpstr + tmpsiz - s > 0);
 304                 }
 305
 306                 LNET_UNLOCK();
 307         }
 308
 309         len = s - tmpstr;     /* how many bytes was written */
 310
 311         if (len > *lenp) {    /* linux-supplied buffer is too small */
 312                 rc = -EINVAL;
 313         } else if (len > 0) { /* wrote something */
 314                 if (copy_to_user(buffer, tmpstr, len))
 315                         rc = -EFAULT;
 316                 else
 317                         *ppos += 1;
 318         }
 319
 320         LIBCFS_FREE(tmpstr, tmpsiz);
 321
 322         if (rc == 0)
 323                 *lenp = len;
 324
 325         return rc;
 326 }
 327
 328 /*
 329  * NB: we don't use the highest bit of *ppos because it's signed;
 330  *     next 9 bits is used to stash idx (assuming that
 331  *     LNET_PEER_HASHSIZE < 512)
 332  */
 333 #define LNET_LOFFT_BITS (sizeof(loff_t) * 8)
 334 #define LNET_PHASH_BITS 9
 335 #define LNET_PHASH_IDX_MASK (((1ULL << LNET_PHASH_BITS) - 1) <<               \
 336                              (LNET_LOFFT_BITS - LNET_PHASH_BITS - 1))
 337 #define LNET_PHASH_NUM_MASK ((1ULL <<                                         \
 338                               (LNET_LOFFT_BITS - LNET_PHASH_BITS -1)) - 1)
 339 #define LNET_PHASH_IDX_GET(pos) (int)(((pos) & LNET_PHASH_IDX_MASK) >>  \
 340                                       (LNET_LOFFT_BITS - LNET_PHASH_BITS -1))
 341 #define LNET_PHASH_NUM_GET(pos) (int)((pos) & LNET_PHASH_NUM_MASK)
 342 #define LNET_PHASH_POS_MAKE(idx, num) ((((loff_t)idx) << (LNET_LOFFT_BITS -   \
 343                                                   LNET_PHASH_BITS -1)) | (num))
 344
 345 int LL_PROC_PROTO(proc_lnet_peers)
 346 {
 347         int        rc = 0;
 348         char      *tmpstr;
 349         char      *s;
 350         const int  tmpsiz      = 256;
 351         int        len;
 352         int       *ver_p       = (unsigned int *)(&filp->private_data);
 353         int        idx;
 354         int        num;
 355
 356         DECLARE_LL_PROC_PPOS_DECL;
 357
 358         idx = LNET_PHASH_IDX_GET(*ppos);
 359         num = LNET_PHASH_NUM_GET(*ppos);
 360
 361         CLASSERT ((1 << LNET_PHASH_BITS) > LNET_PEER_HASHSIZE);
 362
 363         LASSERT (!write);
 364
 365         if (*lenp == 0)
 366                 return 0;
 367
 368         LIBCFS_ALLOC(tmpstr, tmpsiz);
 369         if (tmpstr == NULL)
 370                 return -ENOMEM;
 371
 372         s = tmpstr; /* points to current position in tmpstr[] */
 373
 374         if (*ppos == 0) {
 375                 s += snprintf(s, tmpstr + tmpsiz - s,
 376                               "%-24s %4s %5s %5s %5s %5s %5s %5s %s\n",
 377                               "nid", "refs", "state", "max",
 378                               "rtr", "min", "tx", "min", "queue");
 379                 LASSERT (tmpstr + tmpsiz - s > 0);
 380
 381                 LNET_LOCK();
 382                 *ver_p  = (unsigned int)the_lnet.ln_peertable_version;
 383                 LNET_UNLOCK();
 384
 385                 num++;
 386         } else {
 387                 struct list_head  *p    = NULL;
 388                 lnet_peer_t       *peer = NULL;
 389                 int                skip = num - 1;
 390
 391                 LNET_LOCK();
 392
 393                 if (*ver_p != (unsigned int)the_lnet.ln_peertable_version) {
 394                         LNET_UNLOCK();
 395                         LIBCFS_FREE(tmpstr, tmpsiz);
 396                         return -ESTALE;
 397                 }
 398
 399                 while (idx < LNET_PEER_HASHSIZE) {
 400                         if (p == NULL)
 401                                 p = the_lnet.ln_peer_hash[idx].next;
 402
 403                         while (p != &the_lnet.ln_peer_hash[idx]) {
 404                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 405                                                              lp_hashlist);
 406                                 if (skip == 0) {
 407                                         peer = lp;
 408
 409                                         /* minor optimiztion: start from idx+1
 410                                          * on next iteration if we've just
 411                                          * drained lp_hashlist */
 412                                         if (lp->lp_hashlist.next ==
 413                                             &the_lnet.ln_peer_hash[idx]) {
 414                                                 num = 1;
 415                                                 idx++;
 416                                         } else {
 417                                                 num++;
 418                                         }
 419
 420                                         break;
 421                                 }
 422
 423                                 skip--;
 424                                 p = lp->lp_hashlist.next;
 425                         }
 426
 427                         if (peer != NULL)
 428                                 break;
 429
 430                         p = NULL;
 431                         num = 1;
 432                         idx++;
 433                 }
 434
 435                 if (peer != NULL) {
 436                         lnet_nid_t nid       = peer->lp_nid;
 437                         int        nrefs     = peer->lp_refcount;
 438                         char      *aliveness = "NA";
 439                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 440                         int        txcr      = peer->lp_txcredits;
 441                         int        mintxcr   = peer->lp_mintxcredits;
 442                         int        rtrcr     = peer->lp_rtrcredits;
 443                         int        minrtrcr  = peer->lp_minrtrcredits;
 444                         int        txqnob    = peer->lp_txqnob;
 445
 446                         if (lnet_isrouter(peer) ||
 447                             peer->lp_ni->ni_peertimeout > 0)
 448                                 aliveness = peer->lp_alive ? "up" : "down";
 449
 450                         s += snprintf(s, tmpstr + tmpsiz - s,
 451                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %d\n",
 452                                       libcfs_nid2str(nid), nrefs, aliveness,
 453                                       maxcr, rtrcr, minrtrcr, txcr,
 454                                       mintxcr, txqnob);
 455                         LASSERT (tmpstr + tmpsiz - s > 0);
 456                 }
 457
 458                 LNET_UNLOCK();
 459         }
 460
 461         len = s - tmpstr;     /* how many bytes was written */
 462
 463         if (len > *lenp) {    /* linux-supplied buffer is too small */
 464                 rc = -EINVAL;
 465         } else if (len > 0) { /* wrote something */
 466                 if (copy_to_user(buffer, tmpstr, len))
 467                         rc = -EFAULT;
 468                 else
 469                         *ppos = LNET_PHASH_POS_MAKE(idx, num);
 470         }
 471
 472         LIBCFS_FREE(tmpstr, tmpsiz);
 473
 474         if (rc == 0)
 475                 *lenp = len;
 476
 477         return rc;
 478 }
 479
 480 static int __proc_lnet_buffers(void *data, int write,
 481                                loff_t pos, void *buffer, int nob)
 482 {
 483
 484         int              rc;
 485         int              len;
 486         char            *s;
 487         char            *tmpstr;
 488         const int        tmpsiz = 64 * (LNET_NRBPOOLS + 1); /* (4 %d) * 4 */
 489         int              idx;
 490
 491         LASSERT (!write);
 492
 493         LIBCFS_ALLOC(tmpstr, tmpsiz);
 494         if (tmpstr == NULL)
 495                 return -ENOMEM;
 496
 497         s = tmpstr; /* points to current position in tmpstr[] */
 498
 499         s += snprintf(s, tmpstr + tmpsiz - s,
 500                       "%5s %5s %7s %7s\n",
 501                       "pages", "count", "credits", "min");
 502         LASSERT (tmpstr + tmpsiz - s > 0);
 503
 504         LNET_LOCK();
 505
 506         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 507                 lnet_rtrbufpool_t *rbp = &the_lnet.ln_rtrpools[idx];
 508
 509                 int npages = rbp->rbp_npages;
 510                 int nbuf   = rbp->rbp_nbuffers;
 511                 int cr     = rbp->rbp_credits;
 512                 int mincr  = rbp->rbp_mincredits;
 513
 514                 s += snprintf(s, tmpstr + tmpsiz - s,
 515                               "%5d %5d %7d %7d\n",
 516                               npages, nbuf, cr, mincr);
 517                 LASSERT (tmpstr + tmpsiz - s > 0);
 518         }
 519
 520         LNET_UNLOCK();
 521
 522         len = s - tmpstr;
 523
 524         if (pos >= min_t(int, len, strlen(tmpstr)))
 525                 rc = 0;
 526         else
 527                 rc = trace_copyout_string(buffer, nob,
 528                                           tmpstr + pos, NULL);
 529
 530         LIBCFS_FREE(tmpstr, tmpsiz);
 531         return rc;
 532 }
 533
 534 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 535
 536 int LL_PROC_PROTO(proc_lnet_nis)
 537 {
 538         int        rc = 0;
 539         char      *tmpstr;
 540         char      *s;
 541         const int  tmpsiz = 256;
 542         int        len;
 543
 544         DECLARE_LL_PROC_PPOS_DECL;
 545
 546         LASSERT (!write);
 547
 548         if (*lenp == 0)
 549                 return 0;
 550
 551         LIBCFS_ALLOC(tmpstr, tmpsiz);
 552         if (tmpstr == NULL)
 553                 return -ENOMEM;
 554
 555         s = tmpstr; /* points to current position in tmpstr[] */
 556
 557         if (*ppos == 0) {
 558                 s += snprintf(s, tmpstr + tmpsiz - s,
 559                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 560                               "nid", "status", "alive", "refs", "peer",
 561                               "rtr", "max", "tx", "min");
 562                 LASSERT (tmpstr + tmpsiz - s > 0);
 563         } else {
 564                 struct list_head  *n;
 565                 lnet_ni_t         *ni   = NULL;
 566                 int                skip = *ppos - 1;
 567
 568                 LNET_LOCK();
 569
 570                 n = the_lnet.ln_nis.next;
 571
 572                 while (n != &the_lnet.ln_nis) {
 573                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 574
 575                         if (skip == 0) {
 576                                 ni = a_ni;
 577                                 break;
 578                         }
 579
 580                         skip--;
 581                         n = n->next;
 582                 }
 583
 584                 if (ni != NULL) {
 585                         cfs_time_t now = cfs_time_current();
 586                         int        last_alive = -1;
 587                         int        maxtxcr = ni->ni_maxtxcredits;
 588                         int        txcr = ni->ni_txcredits;
 589                         int        mintxcr = ni->ni_mintxcredits;
 590                         int        npeertxcr = ni->ni_peertxcredits;
 591                         int        npeerrtrcr = ni->ni_peerrtrcredits;
 592                         lnet_nid_t nid = ni->ni_nid;
 593                         int        nref = ni->ni_refcount;
 594                         char      *stat;
 595
 596                         if (the_lnet.ln_routing)
 597                                 last_alive = cfs_duration_sec(cfs_time_sub(now,
 598                                                             ni->ni_last_alive));
 599                         if (ni->ni_lnd->lnd_type == LOLND)  /* @lo forever alive */
 600                                 last_alive = 0;
 601
 602                         LASSERT (ni->ni_status != NULL);
 603                         stat = (ni->ni_status->ns_status == LNET_NI_STATUS_UP) ?
 604                                                                   "up" : "down";
 605
 606                         s += snprintf(s, tmpstr + tmpsiz - s,
 607                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 608                                       libcfs_nid2str(nid), stat, last_alive, nref,
 609                                       npeertxcr, npeerrtrcr, maxtxcr,
 610                                       txcr, mintxcr);
 611                         LASSERT (tmpstr + tmpsiz - s > 0);
 612                 }
 613
 614                 LNET_UNLOCK();
 615         }
 616
 617         len = s - tmpstr;     /* how many bytes was written */
 618
 619         if (len > *lenp) {    /* linux-supplied buffer is too small */
 620                 rc = -EINVAL;
 621         } else if (len > 0) { /* wrote something */
 622                 if (copy_to_user(buffer, tmpstr, len))
 623                         rc = -EFAULT;
 624                 else
 625                         *ppos += 1;
 626         }
 627
 628         LIBCFS_FREE(tmpstr, tmpsiz);
 629
 630         if (rc == 0)
 631                 *lenp = len;
 632
 633         return rc;
 634 }
 635
 636 static cfs_sysctl_table_t lnet_table[] = {
 637         /*
 638          * NB No .strategy entries have been provided since sysctl(8) prefers
 639          * to go via /proc for portability.
 640          */
 641         {
 642                 .ctl_name = PSDEV_LNET_STATS,
 643                 .procname = "stats",
 644                 .mode     = 0644,
 645                 .proc_handler = &proc_lnet_stats,
 646         },
 647         {
 648                 .ctl_name = PSDEV_LNET_ROUTES,
 649                 .procname = "routes",
 650                 .mode     = 0444,
 651                 .proc_handler = &proc_lnet_routes,
 652         },
 653         {
 654                 .ctl_name = PSDEV_LNET_ROUTERS,
 655                 .procname = "routers",
 656                 .mode     = 0444,
 657                 .proc_handler = &proc_lnet_routers,
 658         },
 659         {
 660                 .ctl_name = PSDEV_LNET_PEERS,
 661                 .procname = "peers",
 662                 .mode     = 0444,
 663                 .proc_handler = &proc_lnet_peers,
 664         },
 665         {
 666                 .ctl_name = PSDEV_LNET_PEERS,
 667                 .procname = "buffers",
 668                 .mode     = 0444,
 669                 .proc_handler = &proc_lnet_buffers,
 670         },
 671         {
 672                 .ctl_name = PSDEV_LNET_NIS,
 673                 .procname = "nis",
 674                 .mode     = 0444,
 675                 .proc_handler = &proc_lnet_nis,
 676         },
 677         {0}
 678 };
 679
 680 static cfs_sysctl_table_t top_table[] = {
 681         {
 682                 .ctl_name = CTL_LNET,
 683                 .procname = "lnet",
 684                 .mode     = 0555,
 685                 .data     = NULL,
 686                 .maxlen   = 0,
 687                 .child    = lnet_table,
 688         },
 689         {
 690                 .ctl_name = 0
 691         }
 692 };
 693
 694 void
 695 lnet_proc_init(void)
 696 {
 697 #ifdef CONFIG_SYSCTL
 698         if (lnet_table_header == NULL)
 699                 lnet_table_header = cfs_register_sysctl_table(top_table, 0);
 700 #endif
 701 }
 702
 703 void
 704 lnet_proc_fini(void)
 705 {
 706 #ifdef CONFIG_SYSCTL
 707         if (lnet_table_header != NULL)
 708                 cfs_unregister_sysctl_table(lnet_table_header);
 709
 710         lnet_table_header = NULL;
 711 #endif
 712 }
 713
 714 #else
 715
 716 void
 717 lnet_proc_init(void)
 718 {
 719 }
 720
 721 void
 722 lnet_proc_fini(void)
 723 {
 724 }
 725
 726 #endif