lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2012, 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 %7s %s\n",
 189                               "net", "hops", "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                         lnet_nid_t   nid   = route->lr_gateway->lp_nid;
 246                         int          alive = route->lr_gateway->lp_alive;
 247
 248                         s += snprintf(s, tmpstr + tmpsiz - s,
 249                                       "%-8s %4u %7s %s\n",
 250                                       libcfs_net2str(net), hops,
 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 (cfs_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         DECLARE_LL_PROC_PPOS_DECL;
 291
 292         off = LNET_PROC_HOFF_GET(*ppos);
 293         ver = LNET_PROC_VER_GET(*ppos);
 294
 295         LASSERT (!write);
 296
 297         if (*lenp == 0)
 298                 return 0;
 299
 300         LIBCFS_ALLOC(tmpstr, tmpsiz);
 301         if (tmpstr == NULL)
 302                 return -ENOMEM;
 303
 304         s = tmpstr; /* points to current position in tmpstr[] */
 305
 306         if (*ppos == 0) {
 307                 s += snprintf(s, tmpstr + tmpsiz - s,
 308                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 309                               "ref", "rtr_ref", "alive_cnt", "state",
 310                               "last_ping", "ping_sent", "deadline",
 311                               "down_ni", "router");
 312                 LASSERT(tmpstr + tmpsiz - s > 0);
 313
 314                 lnet_net_lock(0);
 315                 ver = (unsigned int)the_lnet.ln_routers_version;
 316                 lnet_net_unlock(0);
 317                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 318         } else {
 319                 cfs_list_t              *r;
 320                 struct lnet_peer        *peer = NULL;
 321                 int                     skip = off - 1;
 322
 323                 lnet_net_lock(0);
 324
 325                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 326                         lnet_net_unlock(0);
 327
 328                         LIBCFS_FREE(tmpstr, tmpsiz);
 329                         return -ESTALE;
 330                 }
 331
 332                 r = the_lnet.ln_routers.next;
 333
 334                 while (r != &the_lnet.ln_routers) {
 335                         lnet_peer_t *lp = cfs_list_entry(r, lnet_peer_t,
 336                                                          lp_rtr_list);
 337
 338                         if (skip == 0) {
 339                                 peer = lp;
 340                                 break;
 341                         }
 342
 343                         skip--;
 344                         r = r->next;
 345                 }
 346
 347                 if (peer != NULL) {
 348                         lnet_nid_t nid = peer->lp_nid;
 349                         cfs_time_t now = cfs_time_current();
 350                         cfs_time_t deadline = peer->lp_ping_deadline;
 351                         int nrefs     = peer->lp_refcount;
 352                         int nrtrrefs  = peer->lp_rtr_refcount;
 353                         int alive_cnt = peer->lp_alive_count;
 354                         int alive     = peer->lp_alive;
 355                         int pingsent  = !peer->lp_ping_notsent;
 356                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 357                                                      peer->lp_ping_timestamp));
 358                         int down_ni   = 0;
 359                         lnet_route_t *rtr;
 360
 361                         if ((peer->lp_ping_feats &
 362                              LNET_PING_FEAT_NI_STATUS) != 0) {
 363                                 cfs_list_for_each_entry(rtr, &peer->lp_routes,
 364                                                         lr_gwlist) {
 365                                         /* downis on any route should be the
 366                                          * number of downis on the gateway */
 367                                         if (rtr->lr_downis != 0) {
 368                                                 down_ni = rtr->lr_downis;
 369                                                 break;
 370                                         }
 371                                 }
 372                         }
 373
 374                         if (deadline == 0)
 375                                 s += snprintf(s, tmpstr + tmpsiz - s,
 376                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 377                                               nrefs, nrtrrefs, alive_cnt,
 378                                               alive ? "up" : "down", last_ping,
 379                                               pingsent, "NA", down_ni,
 380                                               libcfs_nid2str(nid));
 381                         else
 382                                 s += snprintf(s, tmpstr + tmpsiz - s,
 383                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 384                                               nrefs, nrtrrefs, alive_cnt,
 385                                               alive ? "up" : "down", last_ping,
 386                                               pingsent,
 387                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 388                                               down_ni, libcfs_nid2str(nid));
 389                         LASSERT (tmpstr + tmpsiz - s > 0);
 390                 }
 391
 392                 lnet_net_unlock(0);
 393         }
 394
 395         len = s - tmpstr;     /* how many bytes was written */
 396
 397         if (len > *lenp) {    /* linux-supplied buffer is too small */
 398                 rc = -EINVAL;
 399         } else if (len > 0) { /* wrote something */
 400                 if (cfs_copy_to_user(buffer, tmpstr, len))
 401                         rc = -EFAULT;
 402                 else {
 403                         off += 1;
 404                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 405                 }
 406         }
 407
 408         LIBCFS_FREE(tmpstr, tmpsiz);
 409
 410         if (rc == 0)
 411                 *lenp = len;
 412
 413         return rc;
 414 }
 415
 416 int LL_PROC_PROTO(proc_lnet_peers)
 417 {
 418         const int               tmpsiz  = 256;
 419         struct lnet_peer_table  *ptable;
 420         char                    *tmpstr;
 421         char                    *s;
 422         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 423         int                     ver  = LNET_PROC_VER_GET(*ppos);
 424         int                     hash = LNET_PROC_HASH_GET(*ppos);
 425         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 426         int                     rc = 0;
 427         int                     len;
 428
 429         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 430         LASSERT(!write);
 431
 432         if (*lenp == 0)
 433                 return 0;
 434
 435         if (cpt >= LNET_CPT_NUMBER) {
 436                 *lenp = 0;
 437                 return 0;
 438         }
 439
 440         LIBCFS_ALLOC(tmpstr, tmpsiz);
 441         if (tmpstr == NULL)
 442                 return -ENOMEM;
 443
 444         s = tmpstr; /* points to current position in tmpstr[] */
 445
 446         if (*ppos == 0) {
 447                 s += snprintf(s, tmpstr + tmpsiz - s,
 448                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 449                               "nid", "refs", "state", "last", "max",
 450                               "rtr", "min", "tx", "min", "queue");
 451                 LASSERT (tmpstr + tmpsiz - s > 0);
 452
 453                 hoff++;
 454         } else {
 455                 struct lnet_peer        *peer;
 456                 cfs_list_t              *p;
 457                 int                     skip;
 458  again:
 459                 p = NULL;
 460                 peer = NULL;
 461                 skip = hoff - 1;
 462
 463                 lnet_net_lock(cpt);
 464                 ptable = the_lnet.ln_peer_tables[cpt];
 465                 if (hoff == 1)
 466                         ver = LNET_PROC_VERSION(ptable->pt_version);
 467
 468                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 469                         lnet_net_unlock(cpt);
 470                         LIBCFS_FREE(tmpstr, tmpsiz);
 471                         return -ESTALE;
 472                 }
 473
 474                 while (hash < LNET_PEER_HASH_SIZE) {
 475                         if (p == NULL)
 476                                 p = ptable->pt_hash[hash].next;
 477
 478                         while (p != &ptable->pt_hash[hash]) {
 479                                 lnet_peer_t *lp = cfs_list_entry(p, lnet_peer_t,
 480                                                                  lp_hashlist);
 481                                 if (skip == 0) {
 482                                         peer = lp;
 483
 484                                         /* minor optimization: start from idx+1
 485                                          * on next iteration if we've just
 486                                          * drained lp_hashlist */
 487                                         if (lp->lp_hashlist.next ==
 488                                             &ptable->pt_hash[hash]) {
 489                                                 hoff = 1;
 490                                                 hash++;
 491                                         } else {
 492                                                 hoff++;
 493                                         }
 494
 495                                         break;
 496                                 }
 497
 498                                 skip--;
 499                                 p = lp->lp_hashlist.next;
 500                         }
 501
 502                         if (peer != NULL)
 503                                 break;
 504
 505                         p = NULL;
 506                         hoff = 1;
 507                         hash++;
 508                 }
 509
 510                 if (peer != NULL) {
 511                         lnet_nid_t nid       = peer->lp_nid;
 512                         int        nrefs     = peer->lp_refcount;
 513                         int        lastalive = -1;
 514                         char      *aliveness = "NA";
 515                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 516                         int        txcr      = peer->lp_txcredits;
 517                         int        mintxcr   = peer->lp_mintxcredits;
 518                         int        rtrcr     = peer->lp_rtrcredits;
 519                         int        minrtrcr  = peer->lp_minrtrcredits;
 520                         int        txqnob    = peer->lp_txqnob;
 521
 522                         if (lnet_isrouter(peer) ||
 523                             lnet_peer_aliveness_enabled(peer))
 524                                 aliveness = peer->lp_alive ? "up" : "down";
 525
 526                         if (lnet_peer_aliveness_enabled(peer)) {
 527                                 cfs_time_t     now = cfs_time_current();
 528                                 cfs_duration_t delta;
 529
 530                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 531                                 lastalive = cfs_duration_sec(delta);
 532
 533                                 /* No need to mess up peers contents with
 534                                  * arbitrarily long integers - it suffices to
 535                                  * know that lastalive is more than 10000s old
 536                                  */
 537                                 if (lastalive >= 10000)
 538                                         lastalive = 9999;
 539                         }
 540
 541                         lnet_net_unlock(cpt);
 542
 543                         s += snprintf(s, tmpstr + tmpsiz - s,
 544                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 545                                       libcfs_nid2str(nid), nrefs, aliveness,
 546                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 547                                       mintxcr, txqnob);
 548                         LASSERT (tmpstr + tmpsiz - s > 0);
 549
 550                 } else { /* peer is NULL */
 551                         lnet_net_unlock(cpt);
 552                 }
 553
 554                 if (hash == LNET_PEER_HASH_SIZE) {
 555                         cpt++;
 556                         hash = 0;
 557                         hoff = 1;
 558                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 559                                 goto again;
 560                 }
 561         }
 562
 563         len = s - tmpstr;     /* how many bytes was written */
 564
 565         if (len > *lenp) {    /* linux-supplied buffer is too small */
 566                 rc = -EINVAL;
 567         } else if (len > 0) { /* wrote something */
 568                 if (cfs_copy_to_user(buffer, tmpstr, len))
 569                         rc = -EFAULT;
 570                 else
 571                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 572         }
 573
 574         LIBCFS_FREE(tmpstr, tmpsiz);
 575
 576         if (rc == 0)
 577                 *lenp = len;
 578
 579         return rc;
 580 }
 581
 582 static int __proc_lnet_buffers(void *data, int write,
 583                                loff_t pos, void *buffer, int nob)
 584 {
 585         char            *s;
 586         char            *tmpstr;
 587         int             tmpsiz;
 588         int             idx;
 589         int             len;
 590         int             rc;
 591         int             i;
 592
 593         LASSERT(!write);
 594
 595         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 596         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 597         LIBCFS_ALLOC(tmpstr, tmpsiz);
 598         if (tmpstr == NULL)
 599                 return -ENOMEM;
 600
 601         s = tmpstr; /* points to current position in tmpstr[] */
 602
 603         s += snprintf(s, tmpstr + tmpsiz - s,
 604                       "%5s %5s %7s %7s\n",
 605                       "pages", "count", "credits", "min");
 606         LASSERT (tmpstr + tmpsiz - s > 0);
 607
 608         if (the_lnet.ln_rtrpools == NULL)
 609                 goto out; /* I'm not a router */
 610
 611         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 612                 lnet_rtrbufpool_t *rbp;
 613
 614                 lnet_net_lock(LNET_LOCK_EX);
 615                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 616                         s += snprintf(s, tmpstr + tmpsiz - s,
 617                                       "%5d %5d %7d %7d\n",
 618                                       rbp[idx].rbp_npages,
 619                                       rbp[idx].rbp_nbuffers,
 620                                       rbp[idx].rbp_credits,
 621                                       rbp[idx].rbp_mincredits);
 622                         LASSERT(tmpstr + tmpsiz - s > 0);
 623                 }
 624                 lnet_net_unlock(LNET_LOCK_EX);
 625         }
 626
 627  out:
 628         len = s - tmpstr;
 629
 630         if (pos >= min_t(int, len, strlen(tmpstr)))
 631                 rc = 0;
 632         else
 633                 rc = cfs_trace_copyout_string(buffer, nob,
 634                                               tmpstr + pos, NULL);
 635
 636         LIBCFS_FREE(tmpstr, tmpsiz);
 637         return rc;
 638 }
 639
 640 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 641
 642 int LL_PROC_PROTO(proc_lnet_nis)
 643 {
 644         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 645         int        rc = 0;
 646         char      *tmpstr;
 647         char      *s;
 648         int        len;
 649
 650         DECLARE_LL_PROC_PPOS_DECL;
 651
 652         LASSERT (!write);
 653
 654         if (*lenp == 0)
 655                 return 0;
 656
 657         LIBCFS_ALLOC(tmpstr, tmpsiz);
 658         if (tmpstr == NULL)
 659                 return -ENOMEM;
 660
 661         s = tmpstr; /* points to current position in tmpstr[] */
 662
 663         if (*ppos == 0) {
 664                 s += snprintf(s, tmpstr + tmpsiz - s,
 665                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 666                               "nid", "status", "alive", "refs", "peer",
 667                               "rtr", "max", "tx", "min");
 668                 LASSERT (tmpstr + tmpsiz - s > 0);
 669         } else {
 670                 cfs_list_t        *n;
 671                 lnet_ni_t         *ni   = NULL;
 672                 int                skip = *ppos - 1;
 673
 674                 lnet_net_lock(0);
 675
 676                 n = the_lnet.ln_nis.next;
 677
 678                 while (n != &the_lnet.ln_nis) {
 679                         lnet_ni_t *a_ni = cfs_list_entry(n, lnet_ni_t, ni_list);
 680
 681                         if (skip == 0) {
 682                                 ni = a_ni;
 683                                 break;
 684                         }
 685
 686                         skip--;
 687                         n = n->next;
 688                 }
 689
 690                 if (ni != NULL) {
 691                         struct lnet_tx_queue    *tq;
 692                         char    *stat;
 693                         long    now = cfs_time_current_sec();
 694                         int     last_alive = -1;
 695                         int     i;
 696                         int     j;
 697
 698                         if (the_lnet.ln_routing)
 699                                 last_alive = now - ni->ni_last_alive;
 700
 701                         /* @lo forever alive */
 702                         if (ni->ni_lnd->lnd_type == LOLND)
 703                                 last_alive = 0;
 704
 705                         lnet_ni_lock(ni);
 706                         LASSERT(ni->ni_status != NULL);
 707                         stat = (ni->ni_status->ns_status ==
 708                                 LNET_NI_STATUS_UP) ? "up" : "down";
 709                         lnet_ni_unlock(ni);
 710
 711                         /* we actually output credits information for
 712                          * TX queue of each partition */
 713                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 714                                 for (j = 0; ni->ni_cpts != NULL &&
 715                                      j < ni->ni_ncpts; j++) {
 716                                         if (i == ni->ni_cpts[j])
 717                                                 break;
 718                                 }
 719
 720                                 if (j == ni->ni_ncpts)
 721                                         continue;
 722
 723                                 if (i != 0)
 724                                         lnet_net_lock(i);
 725
 726                                 s += snprintf(s, tmpstr + tmpsiz - s,
 727                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 728                                       libcfs_nid2str(ni->ni_nid), stat,
 729                                       last_alive, *ni->ni_refs[i],
 730                                       ni->ni_peertxcredits,
 731                                       ni->ni_peerrtrcredits,
 732                                       tq->tq_credits_max,
 733                                       tq->tq_credits, tq->tq_credits_min);
 734                                 if (i != 0)
 735                                         lnet_net_unlock(i);
 736                         }
 737                         LASSERT(tmpstr + tmpsiz - s > 0);
 738                 }
 739
 740                 lnet_net_unlock(0);
 741         }
 742
 743         len = s - tmpstr;     /* how many bytes was written */
 744
 745         if (len > *lenp) {    /* linux-supplied buffer is too small */
 746                 rc = -EINVAL;
 747         } else if (len > 0) { /* wrote something */
 748                 if (cfs_copy_to_user(buffer, tmpstr, len))
 749                         rc = -EFAULT;
 750                 else
 751                         *ppos += 1;
 752         }
 753
 754         LIBCFS_FREE(tmpstr, tmpsiz);
 755
 756         if (rc == 0)
 757                 *lenp = len;
 758
 759         return rc;
 760 }
 761
 762 struct lnet_portal_rotors {
 763         int             pr_value;
 764         const char      *pr_name;
 765         const char      *pr_desc;
 766 };
 767
 768 static struct lnet_portal_rotors        portal_rotors[] = {
 769         {
 770                 .pr_value = LNET_PTL_ROTOR_OFF,
 771                 .pr_name  = "OFF",
 772                 .pr_desc  = "Turn off message rotor for wildcard portals"
 773         },
 774         {
 775                 .pr_value = LNET_PTL_ROTOR_ON,
 776                 .pr_name  = "ON",
 777                 .pr_desc  = "round-robin dispatch all PUT messages for "
 778                             "wildcard portals"
 779         },
 780         {
 781                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 782                 .pr_name  = "RR_RT",
 783                 .pr_desc  = "round-robin dispatch routed PUT message for "
 784                             "wildcard portals"
 785         },
 786         {
 787                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 788                 .pr_name  = "HASH_RT",
 789                 .pr_desc  = "dispatch routed PUT message by hashing source "
 790                             "NID for wildcard portals"
 791         },
 792         {
 793                 .pr_value = -1,
 794                 .pr_name  = NULL,
 795                 .pr_desc  = NULL
 796         },
 797 };
 798
 799 extern int portal_rotor;
 800
 801 static int __proc_lnet_portal_rotor(void *data, int write,
 802                                     loff_t pos, void *buffer, int nob)
 803 {
 804         const int       buf_len = 128;
 805         char            *buf;
 806         char            *tmp;
 807         int             rc;
 808         int             i;
 809
 810         LIBCFS_ALLOC(buf, buf_len);
 811         if (buf == NULL)
 812                 return -ENOMEM;
 813
 814         if (!write) {
 815                 lnet_res_lock(0);
 816
 817                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 818                         if (portal_rotors[i].pr_value == portal_rotor)
 819                                 break;
 820                 }
 821
 822                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 823                 lnet_res_unlock(0);
 824
 825                 rc = snprintf(buf, buf_len,
 826                               "{\n\tportals: all\n"
 827                               "\trotor: %s\n\tdescription: %s\n}",
 828                               portal_rotors[i].pr_name,
 829                               portal_rotors[i].pr_desc);
 830
 831                 if (pos >= min_t(int, rc, buf_len)) {
 832                         rc = 0;
 833                 } else {
 834                         rc = cfs_trace_copyout_string(buffer, nob,
 835                                         buf + pos, "\n");
 836                 }
 837                 goto out;
 838         }
 839
 840         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 841         if (rc < 0)
 842                 goto out;
 843
 844         tmp = cfs_trimwhite(buf);
 845
 846         rc = -EINVAL;
 847         lnet_res_lock(0);
 848         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 849                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 850                                     strlen(portal_rotors[i].pr_name)) == 0) {
 851                         portal_rotor = portal_rotors[i].pr_value;
 852                         rc = 0;
 853                         break;
 854                 }
 855         }
 856         lnet_res_unlock(0);
 857 out:
 858         LIBCFS_FREE(buf, buf_len);
 859         return rc;
 860 }
 861 DECLARE_PROC_HANDLER(proc_lnet_portal_rotor);
 862
 863 static cfs_sysctl_table_t lnet_table[] = {
 864         /*
 865          * NB No .strategy entries have been provided since sysctl(8) prefers
 866          * to go via /proc for portability.
 867          */
 868         {
 869                 INIT_CTL_NAME(PSDEV_LNET_STATS)
 870                 .procname = "stats",
 871                 .mode     = 0644,
 872                 .proc_handler = &proc_lnet_stats,
 873         },
 874         {
 875                 INIT_CTL_NAME(PSDEV_LNET_ROUTES)
 876                 .procname = "routes",
 877                 .mode     = 0444,
 878                 .proc_handler = &proc_lnet_routes,
 879         },
 880         {
 881                 INIT_CTL_NAME(PSDEV_LNET_ROUTERS)
 882                 .procname = "routers",
 883                 .mode     = 0444,
 884                 .proc_handler = &proc_lnet_routers,
 885         },
 886         {
 887                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 888                 .procname = "peers",
 889                 .mode     = 0444,
 890                 .proc_handler = &proc_lnet_peers,
 891         },
 892         {
 893                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 894                 .procname = "buffers",
 895                 .mode     = 0444,
 896                 .proc_handler = &proc_lnet_buffers,
 897         },
 898         {
 899                 INIT_CTL_NAME(PSDEV_LNET_NIS)
 900                 .procname = "nis",
 901                 .mode     = 0444,
 902                 .proc_handler = &proc_lnet_nis,
 903         },
 904         {
 905                 INIT_CTL_NAME(PSDEV_LNET_PTL_ROTOR)
 906                 .procname = "portal_rotor",
 907                 .mode     = 0644,
 908                 .proc_handler = &proc_lnet_portal_rotor,
 909         },
 910         {
 911                 INIT_CTL_NAME(0)
 912         }
 913 };
 914
 915 static cfs_sysctl_table_t top_table[] = {
 916         {
 917                 INIT_CTL_NAME(CTL_LNET)
 918                 .procname = "lnet",
 919                 .mode     = 0555,
 920                 .data     = NULL,
 921                 .maxlen   = 0,
 922                 .child    = lnet_table,
 923         },
 924         {
 925                 INIT_CTL_NAME(0)
 926         }
 927 };
 928
 929 void
 930 lnet_proc_init(void)
 931 {
 932 #ifdef CONFIG_SYSCTL
 933         if (lnet_table_header == NULL)
 934                 lnet_table_header = cfs_register_sysctl_table(top_table, 0);
 935 #endif
 936 }
 937
 938 void
 939 lnet_proc_fini(void)
 940 {
 941 #ifdef CONFIG_SYSCTL
 942         if (lnet_table_header != NULL)
 943                 cfs_unregister_sysctl_table(lnet_table_header);
 944
 945         lnet_table_header = NULL;
 946 #endif
 947 }
 948
 949 #else
 950
 951 void
 952 lnet_proc_init(void)
 953 {
 954 }
 955
 956 void
 957 lnet_proc_fini(void)
 958 {
 959 }
 960
 961 #endif