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