lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2013, Intel Corporation.
   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. You might need to update sanity test 215
  31  * if any file format is changed. */
  32
  33 static cfs_sysctl_table_header_t *lnet_table_header = NULL;
  34
  35 #ifndef HAVE_SYSCTL_UNNUMBERED
  36 #define CTL_LNET         (0x100)
  37 enum {
  38         PSDEV_LNET_STATS = 100,
  39         PSDEV_LNET_ROUTES,
  40         PSDEV_LNET_ROUTERS,
  41         PSDEV_LNET_PEERS,
  42         PSDEV_LNET_BUFFERS,
  43         PSDEV_LNET_NIS,
  44         PSDEV_LNET_PTL_ROTOR,
  45 };
  46 #else
  47 #define CTL_LNET           CTL_UNNUMBERED
  48 #define PSDEV_LNET_STATS   CTL_UNNUMBERED
  49 #define PSDEV_LNET_ROUTES  CTL_UNNUMBERED
  50 #define PSDEV_LNET_ROUTERS CTL_UNNUMBERED
  51 #define PSDEV_LNET_PEERS   CTL_UNNUMBERED
  52 #define PSDEV_LNET_BUFFERS CTL_UNNUMBERED
  53 #define PSDEV_LNET_NIS     CTL_UNNUMBERED
  54 #define PSDEV_LNET_PTL_ROTOR    CTL_UNNUMBERED
  55 #endif
  56
  57 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  58 /*
  59  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  60  */
  61 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  62 /* change version, 16 bits or 8 bits */
  63 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  64
  65 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  66 /*
  67  * bits for peer hash offset
  68  * NB: we don't use the highest bit of *ppos because it's signed
  69  */
  70 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  71                                  LNET_PROC_CPT_BITS -    \
  72                                  LNET_PROC_VER_BITS -    \
  73                                  LNET_PROC_HASH_BITS - 1)
  74 /* bits for hash index + position */
  75 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  76 /* bits for peer hash table + hash version */
  77 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  78
  79 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  80 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  81 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  82 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  83
  84 #define LNET_PROC_CPT_GET(pos)                          \
  85         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  86
  87 #define LNET_PROC_VER_GET(pos)                          \
  88         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  89
  90 #define LNET_PROC_HASH_GET(pos)                         \
  91         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  92
  93 #define LNET_PROC_HOFF_GET(pos)                         \
  94         (int)((pos) & LNET_PROC_HOFF_MASK)
  95
  96 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  97         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  98         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  99         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
 100         ((off) & LNET_PROC_HOFF_MASK))
 101
 102 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
 103
 104 static int __proc_lnet_stats(void *data, int write,
 105                              loff_t pos, void *buffer, int nob)
 106 {
 107         int              rc;
 108         lnet_counters_t *ctrs;
 109         int              len;
 110         char            *tmpstr;
 111         const int        tmpsiz = 256; /* 7 %u and 4 LPU64 */
 112
 113         if (write) {
 114                 lnet_counters_reset();
 115                 return 0;
 116         }
 117
 118         /* read */
 119
 120         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
 121         if (ctrs == NULL)
 122                 return -ENOMEM;
 123
 124         LIBCFS_ALLOC(tmpstr, tmpsiz);
 125         if (tmpstr == NULL) {
 126                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 127                 return -ENOMEM;
 128         }
 129
 130         lnet_counters_get(ctrs);
 131
 132         len = snprintf(tmpstr, tmpsiz,
 133                        "%u %u %u %u %u %u %u "LPU64" "LPU64" "
 134                        LPU64" "LPU64,
 135                        ctrs->msgs_alloc, ctrs->msgs_max,
 136                        ctrs->errors,
 137                        ctrs->send_count, ctrs->recv_count,
 138                        ctrs->route_count, ctrs->drop_count,
 139                        ctrs->send_length, ctrs->recv_length,
 140                        ctrs->route_length, ctrs->drop_length);
 141
 142         if (pos >= min_t(int, len, strlen(tmpstr)))
 143                 rc = 0;
 144         else
 145                 rc = cfs_trace_copyout_string(buffer, nob,
 146                                               tmpstr + pos, "\n");
 147
 148         LIBCFS_FREE(tmpstr, tmpsiz);
 149         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 150         return rc;
 151 }
 152
 153 DECLARE_PROC_HANDLER(proc_lnet_stats);
 154
 155 int LL_PROC_PROTO(proc_lnet_routes)
 156 {
 157         const int       tmpsiz = 256;
 158         char            *tmpstr;
 159         char            *s;
 160         int             rc = 0;
 161         int             len;
 162         int             ver;
 163         int             off;
 164
 165         DECLARE_LL_PROC_PPOS_DECL;
 166
 167         CLASSERT(sizeof(loff_t) >= 4);
 168
 169         off = LNET_PROC_HOFF_GET(*ppos);
 170         ver = LNET_PROC_VER_GET(*ppos);
 171
 172         LASSERT (!write);
 173
 174         if (*lenp == 0)
 175                 return 0;
 176
 177         LIBCFS_ALLOC(tmpstr, tmpsiz);
 178         if (tmpstr == NULL)
 179                 return -ENOMEM;
 180
 181         s = tmpstr; /* points to current position in tmpstr[] */
 182
 183         if (*ppos == 0) {
 184                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 185                               the_lnet.ln_routing ? "enabled" : "disabled");
 186                 LASSERT (tmpstr + tmpsiz - s > 0);
 187
 188                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 189                               "net", "hops", "priority", "state", "router");
 190                 LASSERT (tmpstr + tmpsiz - s > 0);
 191
 192                 lnet_net_lock(0);
 193                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 194                 lnet_net_unlock(0);
 195                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 196         } else {
 197                 cfs_list_t              *n;
 198                 cfs_list_t              *r;
 199                 lnet_route_t            *route = NULL;
 200                 lnet_remotenet_t        *rnet  = NULL;
 201                 int                     skip  = off - 1;
 202                 cfs_list_t              *rn_list;
 203                 int                     i;
 204
 205                 lnet_net_lock(0);
 206
 207                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 208                         lnet_net_unlock(0);
 209                         LIBCFS_FREE(tmpstr, tmpsiz);
 210                         return -ESTALE;
 211                 }
 212
 213                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 214                      i++) {
 215                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 216
 217                         n = rn_list->next;
 218
 219                         while (n != rn_list && route == NULL) {
 220                                 rnet = cfs_list_entry(n, lnet_remotenet_t,
 221                                                       lrn_list);
 222
 223                                 r = rnet->lrn_routes.next;
 224
 225                                 while (r != &rnet->lrn_routes) {
 226                                         lnet_route_t *re =
 227                                                 cfs_list_entry(r, lnet_route_t,
 228                                                                lr_list);
 229                                         if (skip == 0) {
 230                                                 route = re;
 231                                                 break;
 232                                         }
 233
 234                                         skip--;
 235                                         r = r->next;
 236                                 }
 237
 238                                 n = n->next;
 239                         }
 240                 }
 241
 242                 if (route != NULL) {
 243                         __u32        net        = rnet->lrn_net;
 244                         unsigned int hops       = route->lr_hops;
 245                         unsigned int priority   = route->lr_priority;
 246                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 247                         int          alive      = route->lr_gateway->lp_alive;
 248
 249                         s += snprintf(s, tmpstr + tmpsiz - s,
 250                                       "%-8s %4u %8u %7s %s\n",
 251                                       libcfs_net2str(net), hops,
 252                                       priority,
 253                                       alive ? "up" : "down",
 254                                       libcfs_nid2str(nid));
 255                         LASSERT(tmpstr + tmpsiz - s > 0);
 256                 }
 257
 258                 lnet_net_unlock(0);
 259         }
 260
 261         len = s - tmpstr;     /* how many bytes was written */
 262
 263         if (len > *lenp) {    /* linux-supplied buffer is too small */
 264                 rc = -EINVAL;
 265         } else if (len > 0) { /* wrote something */
 266                 if (copy_to_user(buffer, tmpstr, len))
 267                         rc = -EFAULT;
 268                 else {
 269                         off += 1;
 270                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 271                 }
 272         }
 273
 274         LIBCFS_FREE(tmpstr, tmpsiz);
 275
 276         if (rc == 0)
 277                 *lenp = len;
 278
 279         return rc;
 280 }
 281
 282 int LL_PROC_PROTO(proc_lnet_routers)
 283 {
 284         int        rc = 0;
 285         char      *tmpstr;
 286         char      *s;
 287         const int  tmpsiz = 256;
 288         int        len;
 289         int        ver;
 290         int        off;
 291
 292         DECLARE_LL_PROC_PPOS_DECL;
 293
 294         off = LNET_PROC_HOFF_GET(*ppos);
 295         ver = LNET_PROC_VER_GET(*ppos);
 296
 297         LASSERT (!write);
 298
 299         if (*lenp == 0)
 300                 return 0;
 301
 302         LIBCFS_ALLOC(tmpstr, tmpsiz);
 303         if (tmpstr == NULL)
 304                 return -ENOMEM;
 305
 306         s = tmpstr; /* points to current position in tmpstr[] */
 307
 308         if (*ppos == 0) {
 309                 s += snprintf(s, tmpstr + tmpsiz - s,
 310                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 311                               "ref", "rtr_ref", "alive_cnt", "state",
 312                               "last_ping", "ping_sent", "deadline",
 313                               "down_ni", "router");
 314                 LASSERT(tmpstr + tmpsiz - s > 0);
 315
 316                 lnet_net_lock(0);
 317                 ver = (unsigned int)the_lnet.ln_routers_version;
 318                 lnet_net_unlock(0);
 319                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 320         } else {
 321                 cfs_list_t              *r;
 322                 struct lnet_peer        *peer = NULL;
 323                 int                     skip = off - 1;
 324
 325                 lnet_net_lock(0);
 326
 327                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 328                         lnet_net_unlock(0);
 329
 330                         LIBCFS_FREE(tmpstr, tmpsiz);
 331                         return -ESTALE;
 332                 }
 333
 334                 r = the_lnet.ln_routers.next;
 335
 336                 while (r != &the_lnet.ln_routers) {
 337                         lnet_peer_t *lp = cfs_list_entry(r, lnet_peer_t,
 338                                                          lp_rtr_list);
 339
 340                         if (skip == 0) {
 341                                 peer = lp;
 342                                 break;
 343                         }
 344
 345                         skip--;
 346                         r = r->next;
 347                 }
 348
 349                 if (peer != NULL) {
 350                         lnet_nid_t nid = peer->lp_nid;
 351                         cfs_time_t now = cfs_time_current();
 352                         cfs_time_t deadline = peer->lp_ping_deadline;
 353                         int nrefs     = peer->lp_refcount;
 354                         int nrtrrefs  = peer->lp_rtr_refcount;
 355                         int alive_cnt = peer->lp_alive_count;
 356                         int alive     = peer->lp_alive;
 357                         int pingsent  = !peer->lp_ping_notsent;
 358                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 359                                                      peer->lp_ping_timestamp));
 360                         int down_ni   = 0;
 361                         lnet_route_t *rtr;
 362
 363                         if ((peer->lp_ping_feats &
 364                              LNET_PING_FEAT_NI_STATUS) != 0) {
 365                                 cfs_list_for_each_entry(rtr, &peer->lp_routes,
 366                                                         lr_gwlist) {
 367                                         /* downis on any route should be the
 368                                          * number of downis on the gateway */
 369                                         if (rtr->lr_downis != 0) {
 370                                                 down_ni = rtr->lr_downis;
 371                                                 break;
 372                                         }
 373                                 }
 374                         }
 375
 376                         if (deadline == 0)
 377                                 s += snprintf(s, tmpstr + tmpsiz - s,
 378                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 379                                               nrefs, nrtrrefs, alive_cnt,
 380                                               alive ? "up" : "down", last_ping,
 381                                               pingsent, "NA", down_ni,
 382                                               libcfs_nid2str(nid));
 383                         else
 384                                 s += snprintf(s, tmpstr + tmpsiz - s,
 385                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 386                                               nrefs, nrtrrefs, alive_cnt,
 387                                               alive ? "up" : "down", last_ping,
 388                                               pingsent,
 389                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 390                                               down_ni, libcfs_nid2str(nid));
 391                         LASSERT (tmpstr + tmpsiz - s > 0);
 392                 }
 393
 394                 lnet_net_unlock(0);
 395         }
 396
 397         len = s - tmpstr;     /* how many bytes was written */
 398
 399         if (len > *lenp) {    /* linux-supplied buffer is too small */
 400                 rc = -EINVAL;
 401         } else if (len > 0) { /* wrote something */
 402                 if (copy_to_user(buffer, tmpstr, len))
 403                         rc = -EFAULT;
 404                 else {
 405                         off += 1;
 406                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 407                 }
 408         }
 409
 410         LIBCFS_FREE(tmpstr, tmpsiz);
 411
 412         if (rc == 0)
 413                 *lenp = len;
 414
 415         return rc;
 416 }
 417
 418 int LL_PROC_PROTO(proc_lnet_peers)
 419 {
 420         const int               tmpsiz  = 256;
 421         struct lnet_peer_table  *ptable;
 422         char                    *tmpstr;
 423         char                    *s;
 424         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 425         int                     ver  = LNET_PROC_VER_GET(*ppos);
 426         int                     hash = LNET_PROC_HASH_GET(*ppos);
 427         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 428         int                     rc = 0;
 429         int                     len;
 430
 431         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 432         LASSERT(!write);
 433
 434         if (*lenp == 0)
 435                 return 0;
 436
 437         if (cpt >= LNET_CPT_NUMBER) {
 438                 *lenp = 0;
 439                 return 0;
 440         }
 441
 442         LIBCFS_ALLOC(tmpstr, tmpsiz);
 443         if (tmpstr == NULL)
 444                 return -ENOMEM;
 445
 446         s = tmpstr; /* points to current position in tmpstr[] */
 447
 448         if (*ppos == 0) {
 449                 s += snprintf(s, tmpstr + tmpsiz - s,
 450                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 451                               "nid", "refs", "state", "last", "max",
 452                               "rtr", "min", "tx", "min", "queue");
 453                 LASSERT (tmpstr + tmpsiz - s > 0);
 454
 455                 hoff++;
 456         } else {
 457                 struct lnet_peer        *peer;
 458                 cfs_list_t              *p;
 459                 int                     skip;
 460  again:
 461                 p = NULL;
 462                 peer = NULL;
 463                 skip = hoff - 1;
 464
 465                 lnet_net_lock(cpt);
 466                 ptable = the_lnet.ln_peer_tables[cpt];
 467                 if (hoff == 1)
 468                         ver = LNET_PROC_VERSION(ptable->pt_version);
 469
 470                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 471                         lnet_net_unlock(cpt);
 472                         LIBCFS_FREE(tmpstr, tmpsiz);
 473                         return -ESTALE;
 474                 }
 475
 476                 while (hash < LNET_PEER_HASH_SIZE) {
 477                         if (p == NULL)
 478                                 p = ptable->pt_hash[hash].next;
 479
 480                         while (p != &ptable->pt_hash[hash]) {
 481                                 lnet_peer_t *lp = cfs_list_entry(p, lnet_peer_t,
 482                                                                  lp_hashlist);
 483                                 if (skip == 0) {
 484                                         peer = lp;
 485
 486                                         /* minor optimization: start from idx+1
 487                                          * on next iteration if we've just
 488                                          * drained lp_hashlist */
 489                                         if (lp->lp_hashlist.next ==
 490                                             &ptable->pt_hash[hash]) {
 491                                                 hoff = 1;
 492                                                 hash++;
 493                                         } else {
 494                                                 hoff++;
 495                                         }
 496
 497                                         break;
 498                                 }
 499
 500                                 skip--;
 501                                 p = lp->lp_hashlist.next;
 502                         }
 503
 504                         if (peer != NULL)
 505                                 break;
 506
 507                         p = NULL;
 508                         hoff = 1;
 509                         hash++;
 510                 }
 511
 512                 if (peer != NULL) {
 513                         lnet_nid_t nid       = peer->lp_nid;
 514                         int        nrefs     = peer->lp_refcount;
 515                         int        lastalive = -1;
 516                         char      *aliveness = "NA";
 517                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 518                         int        txcr      = peer->lp_txcredits;
 519                         int        mintxcr   = peer->lp_mintxcredits;
 520                         int        rtrcr     = peer->lp_rtrcredits;
 521                         int        minrtrcr  = peer->lp_minrtrcredits;
 522                         int        txqnob    = peer->lp_txqnob;
 523
 524                         if (lnet_isrouter(peer) ||
 525                             lnet_peer_aliveness_enabled(peer))
 526                                 aliveness = peer->lp_alive ? "up" : "down";
 527
 528                         if (lnet_peer_aliveness_enabled(peer)) {
 529                                 cfs_time_t     now = cfs_time_current();
 530                                 cfs_duration_t delta;
 531
 532                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 533                                 lastalive = cfs_duration_sec(delta);
 534
 535                                 /* No need to mess up peers contents with
 536                                  * arbitrarily long integers - it suffices to
 537                                  * know that lastalive is more than 10000s old
 538                                  */
 539                                 if (lastalive >= 10000)
 540                                         lastalive = 9999;
 541                         }
 542
 543                         lnet_net_unlock(cpt);
 544
 545                         s += snprintf(s, tmpstr + tmpsiz - s,
 546                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 547                                       libcfs_nid2str(nid), nrefs, aliveness,
 548                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 549                                       mintxcr, txqnob);
 550                         LASSERT (tmpstr + tmpsiz - s > 0);
 551
 552                 } else { /* peer is NULL */
 553                         lnet_net_unlock(cpt);
 554                 }
 555
 556                 if (hash == LNET_PEER_HASH_SIZE) {
 557                         cpt++;
 558                         hash = 0;
 559                         hoff = 1;
 560                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 561                                 goto again;
 562                 }
 563         }
 564
 565         len = s - tmpstr;     /* how many bytes was written */
 566
 567         if (len > *lenp) {    /* linux-supplied buffer is too small */
 568                 rc = -EINVAL;
 569         } else if (len > 0) { /* wrote something */
 570                 if (copy_to_user(buffer, tmpstr, len))
 571                         rc = -EFAULT;
 572                 else
 573                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 574         }
 575
 576         LIBCFS_FREE(tmpstr, tmpsiz);
 577
 578         if (rc == 0)
 579                 *lenp = len;
 580
 581         return rc;
 582 }
 583
 584 static int __proc_lnet_buffers(void *data, int write,
 585                                loff_t pos, void *buffer, int nob)
 586 {
 587         char            *s;
 588         char            *tmpstr;
 589         int             tmpsiz;
 590         int             idx;
 591         int             len;
 592         int             rc;
 593         int             i;
 594
 595         LASSERT(!write);
 596
 597         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 598         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 599         LIBCFS_ALLOC(tmpstr, tmpsiz);
 600         if (tmpstr == NULL)
 601                 return -ENOMEM;
 602
 603         s = tmpstr; /* points to current position in tmpstr[] */
 604
 605         s += snprintf(s, tmpstr + tmpsiz - s,
 606                       "%5s %5s %7s %7s\n",
 607                       "pages", "count", "credits", "min");
 608         LASSERT (tmpstr + tmpsiz - s > 0);
 609
 610         if (the_lnet.ln_rtrpools == NULL)
 611                 goto out; /* I'm not a router */
 612
 613         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 614                 lnet_rtrbufpool_t *rbp;
 615
 616                 lnet_net_lock(LNET_LOCK_EX);
 617                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 618                         s += snprintf(s, tmpstr + tmpsiz - s,
 619                                       "%5d %5d %7d %7d\n",
 620                                       rbp[idx].rbp_npages,
 621                                       rbp[idx].rbp_nbuffers,
 622                                       rbp[idx].rbp_credits,
 623                                       rbp[idx].rbp_mincredits);
 624                         LASSERT(tmpstr + tmpsiz - s > 0);
 625                 }
 626                 lnet_net_unlock(LNET_LOCK_EX);
 627         }
 628
 629  out:
 630         len = s - tmpstr;
 631
 632         if (pos >= min_t(int, len, strlen(tmpstr)))
 633                 rc = 0;
 634         else
 635                 rc = cfs_trace_copyout_string(buffer, nob,
 636                                               tmpstr + pos, NULL);
 637
 638         LIBCFS_FREE(tmpstr, tmpsiz);
 639         return rc;
 640 }
 641
 642 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 643
 644 int LL_PROC_PROTO(proc_lnet_nis)
 645 {
 646         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 647         int        rc = 0;
 648         char      *tmpstr;
 649         char      *s;
 650         int        len;
 651
 652         DECLARE_LL_PROC_PPOS_DECL;
 653
 654         LASSERT (!write);
 655
 656         if (*lenp == 0)
 657                 return 0;
 658
 659         LIBCFS_ALLOC(tmpstr, tmpsiz);
 660         if (tmpstr == NULL)
 661                 return -ENOMEM;
 662
 663         s = tmpstr; /* points to current position in tmpstr[] */
 664
 665         if (*ppos == 0) {
 666                 s += snprintf(s, tmpstr + tmpsiz - s,
 667                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 668                               "nid", "status", "alive", "refs", "peer",
 669                               "rtr", "max", "tx", "min");
 670                 LASSERT (tmpstr + tmpsiz - s > 0);
 671         } else {
 672                 cfs_list_t        *n;
 673                 lnet_ni_t         *ni   = NULL;
 674                 int                skip = *ppos - 1;
 675
 676                 lnet_net_lock(0);
 677
 678                 n = the_lnet.ln_nis.next;
 679
 680                 while (n != &the_lnet.ln_nis) {
 681                         lnet_ni_t *a_ni = cfs_list_entry(n, lnet_ni_t, ni_list);
 682
 683                         if (skip == 0) {
 684                                 ni = a_ni;
 685                                 break;
 686                         }
 687
 688                         skip--;
 689                         n = n->next;
 690                 }
 691
 692                 if (ni != NULL) {
 693                         struct lnet_tx_queue    *tq;
 694                         char    *stat;
 695                         long    now = cfs_time_current_sec();
 696                         int     last_alive = -1;
 697                         int     i;
 698                         int     j;
 699
 700                         if (the_lnet.ln_routing)
 701                                 last_alive = now - ni->ni_last_alive;
 702
 703                         /* @lo forever alive */
 704                         if (ni->ni_lnd->lnd_type == LOLND)
 705                                 last_alive = 0;
 706
 707                         lnet_ni_lock(ni);
 708                         LASSERT(ni->ni_status != NULL);
 709                         stat = (ni->ni_status->ns_status ==
 710                                 LNET_NI_STATUS_UP) ? "up" : "down";
 711                         lnet_ni_unlock(ni);
 712
 713                         /* we actually output credits information for
 714                          * TX queue of each partition */
 715                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 716                                 for (j = 0; ni->ni_cpts != NULL &&
 717                                      j < ni->ni_ncpts; j++) {
 718                                         if (i == ni->ni_cpts[j])
 719                                                 break;
 720                                 }
 721
 722                                 if (j == ni->ni_ncpts)
 723                                         continue;
 724
 725                                 if (i != 0)
 726                                         lnet_net_lock(i);
 727
 728                                 s += snprintf(s, tmpstr + tmpsiz - s,
 729                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 730                                       libcfs_nid2str(ni->ni_nid), stat,
 731                                       last_alive, *ni->ni_refs[i],
 732                                       ni->ni_peertxcredits,
 733                                       ni->ni_peerrtrcredits,
 734                                       tq->tq_credits_max,
 735                                       tq->tq_credits, tq->tq_credits_min);
 736                                 if (i != 0)
 737                                         lnet_net_unlock(i);
 738                         }
 739                         LASSERT(tmpstr + tmpsiz - s > 0);
 740                 }
 741
 742                 lnet_net_unlock(0);
 743         }
 744
 745         len = s - tmpstr;     /* how many bytes was written */
 746
 747         if (len > *lenp) {    /* linux-supplied buffer is too small */
 748                 rc = -EINVAL;
 749         } else if (len > 0) { /* wrote something */
 750                 if (copy_to_user(buffer, tmpstr, len))
 751                         rc = -EFAULT;
 752                 else
 753                         *ppos += 1;
 754         }
 755
 756         LIBCFS_FREE(tmpstr, tmpsiz);
 757
 758         if (rc == 0)
 759                 *lenp = len;
 760
 761         return rc;
 762 }
 763
 764 struct lnet_portal_rotors {
 765         int             pr_value;
 766         const char      *pr_name;
 767         const char      *pr_desc;
 768 };
 769
 770 static struct lnet_portal_rotors        portal_rotors[] = {
 771         {
 772                 .pr_value = LNET_PTL_ROTOR_OFF,
 773                 .pr_name  = "OFF",
 774                 .pr_desc  = "Turn off message rotor for wildcard portals"
 775         },
 776         {
 777                 .pr_value = LNET_PTL_ROTOR_ON,
 778                 .pr_name  = "ON",
 779                 .pr_desc  = "round-robin dispatch all PUT messages for "
 780                             "wildcard portals"
 781         },
 782         {
 783                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 784                 .pr_name  = "RR_RT",
 785                 .pr_desc  = "round-robin dispatch routed PUT message for "
 786                             "wildcard portals"
 787         },
 788         {
 789                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 790                 .pr_name  = "HASH_RT",
 791                 .pr_desc  = "dispatch routed PUT message by hashing source "
 792                             "NID for wildcard portals"
 793         },
 794         {
 795                 .pr_value = -1,
 796                 .pr_name  = NULL,
 797                 .pr_desc  = NULL
 798         },
 799 };
 800
 801 extern int portal_rotor;
 802
 803 static int __proc_lnet_portal_rotor(void *data, int write,
 804                                     loff_t pos, void *buffer, int nob)
 805 {
 806         const int       buf_len = 128;
 807         char            *buf;
 808         char            *tmp;
 809         int             rc;
 810         int             i;
 811
 812         LIBCFS_ALLOC(buf, buf_len);
 813         if (buf == NULL)
 814                 return -ENOMEM;
 815
 816         if (!write) {
 817                 lnet_res_lock(0);
 818
 819                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 820                         if (portal_rotors[i].pr_value == portal_rotor)
 821                                 break;
 822                 }
 823
 824                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 825                 lnet_res_unlock(0);
 826
 827                 rc = snprintf(buf, buf_len,
 828                               "{\n\tportals: all\n"
 829                               "\trotor: %s\n\tdescription: %s\n}",
 830                               portal_rotors[i].pr_name,
 831                               portal_rotors[i].pr_desc);
 832
 833                 if (pos >= min_t(int, rc, buf_len)) {
 834                         rc = 0;
 835                 } else {
 836                         rc = cfs_trace_copyout_string(buffer, nob,
 837                                         buf + pos, "\n");
 838                 }
 839                 goto out;
 840         }
 841
 842         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 843         if (rc < 0)
 844                 goto out;
 845
 846         tmp = cfs_trimwhite(buf);
 847
 848         rc = -EINVAL;
 849         lnet_res_lock(0);
 850         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 851                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 852                                     strlen(portal_rotors[i].pr_name)) == 0) {
 853                         portal_rotor = portal_rotors[i].pr_value;
 854                         rc = 0;
 855                         break;
 856                 }
 857         }
 858         lnet_res_unlock(0);
 859 out:
 860         LIBCFS_FREE(buf, buf_len);
 861         return rc;
 862 }
 863 DECLARE_PROC_HANDLER(proc_lnet_portal_rotor);
 864
 865 static cfs_sysctl_table_t lnet_table[] = {
 866         /*
 867          * NB No .strategy entries have been provided since sysctl(8) prefers
 868          * to go via /proc for portability.
 869          */
 870         {
 871                 INIT_CTL_NAME(PSDEV_LNET_STATS)
 872                 .procname = "stats",
 873                 .mode     = 0644,
 874                 .proc_handler = &proc_lnet_stats,
 875         },
 876         {
 877                 INIT_CTL_NAME(PSDEV_LNET_ROUTES)
 878                 .procname = "routes",
 879                 .mode     = 0444,
 880                 .proc_handler = &proc_lnet_routes,
 881         },
 882         {
 883                 INIT_CTL_NAME(PSDEV_LNET_ROUTERS)
 884                 .procname = "routers",
 885                 .mode     = 0444,
 886                 .proc_handler = &proc_lnet_routers,
 887         },
 888         {
 889                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 890                 .procname = "peers",
 891                 .mode     = 0444,
 892                 .proc_handler = &proc_lnet_peers,
 893         },
 894         {
 895                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 896                 .procname = "buffers",
 897                 .mode     = 0444,
 898                 .proc_handler = &proc_lnet_buffers,
 899         },
 900         {
 901                 INIT_CTL_NAME(PSDEV_LNET_NIS)
 902                 .procname = "nis",
 903                 .mode     = 0444,
 904                 .proc_handler = &proc_lnet_nis,
 905         },
 906         {
 907                 INIT_CTL_NAME(PSDEV_LNET_PTL_ROTOR)
 908                 .procname = "portal_rotor",
 909                 .mode     = 0644,
 910                 .proc_handler = &proc_lnet_portal_rotor,
 911         },
 912         {
 913                 INIT_CTL_NAME(0)
 914         }
 915 };
 916
 917 static cfs_sysctl_table_t top_table[] = {
 918         {
 919                 INIT_CTL_NAME(CTL_LNET)
 920                 .procname = "lnet",
 921                 .mode     = 0555,
 922                 .data     = NULL,
 923                 .maxlen   = 0,
 924                 .child    = lnet_table,
 925         },
 926         {
 927                 INIT_CTL_NAME(0)
 928         }
 929 };
 930
 931 void
 932 lnet_proc_init(void)
 933 {
 934 #ifdef CONFIG_SYSCTL
 935         if (lnet_table_header == NULL)
 936                 lnet_table_header = cfs_register_sysctl_table(top_table, 0);
 937 #endif
 938 }
 939
 940 void
 941 lnet_proc_fini(void)
 942 {
 943 #ifdef CONFIG_SYSCTL
 944         if (lnet_table_header != NULL)
 945                 cfs_unregister_sysctl_table(lnet_table_header);
 946
 947         lnet_table_header = NULL;
 948 #endif
 949 }
 950
 951 #else
 952
 953 void
 954 lnet_proc_init(void)
 955 {
 956 }
 957
 958 void
 959 lnet_proc_fini(void)
 960 {
 961 }
 962
 963 #endif