lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2015, Intel Corporation.
   5  *
   6  *   This file is part of Lustre, https://wiki.hpdd.intel.com/
   7  *
   8  *   Portals is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Portals is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Portals; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define DEBUG_SUBSYSTEM S_LNET
  24 #include <libcfs/libcfs.h>
  25 #include <lnet/lib-lnet.h>
  26
  27 /* This is really lnet_proc.c. You might need to update sanity test 215
  28  * if any file format is changed. */
  29
  30 static struct ctl_table_header *lnet_table_header = NULL;
  31
  32 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  33 /*
  34  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  35  */
  36 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  37 /* change version, 16 bits or 8 bits */
  38 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  39
  40 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  41 /*
  42  * bits for peer hash offset
  43  * NB: we don't use the highest bit of *ppos because it's signed
  44  */
  45 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  46                                  LNET_PROC_CPT_BITS -    \
  47                                  LNET_PROC_VER_BITS -    \
  48                                  LNET_PROC_HASH_BITS - 1)
  49 /* bits for hash index + position */
  50 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  51 /* bits for peer hash table + hash version */
  52 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  53
  54 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  55 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  56 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  57 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  58
  59 #define LNET_PROC_CPT_GET(pos)                          \
  60         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  61
  62 #define LNET_PROC_VER_GET(pos)                          \
  63         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  64
  65 #define LNET_PROC_HASH_GET(pos)                         \
  66         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  67
  68 #define LNET_PROC_HOFF_GET(pos)                         \
  69         (int)((pos) & LNET_PROC_HOFF_MASK)
  70
  71 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  72         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  73         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  74         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  75         ((off) & LNET_PROC_HOFF_MASK))
  76
  77 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  78
  79 static int __proc_lnet_stats(void *data, int write,
  80                              loff_t pos, void __user *buffer, int nob)
  81 {
  82         int              rc;
  83         lnet_counters_t *ctrs;
  84         int              len;
  85         char            *tmpstr;
  86         const int        tmpsiz = 256; /* 7 %u and 4 __u64 */
  87
  88         if (write) {
  89                 lnet_counters_reset();
  90                 return 0;
  91         }
  92
  93         /* read */
  94
  95         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  96         if (ctrs == NULL)
  97                 return -ENOMEM;
  98
  99         LIBCFS_ALLOC(tmpstr, tmpsiz);
 100         if (tmpstr == NULL) {
 101                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 102                 return -ENOMEM;
 103         }
 104
 105         lnet_counters_get(ctrs);
 106
 107         len = snprintf(tmpstr, tmpsiz,
 108                        "%u %u %u %u %u %u %u %llu %llu "
 109                        "%llu %llu",
 110                        ctrs->msgs_alloc, ctrs->msgs_max,
 111                        ctrs->errors,
 112                        ctrs->send_count, ctrs->recv_count,
 113                        ctrs->route_count, ctrs->drop_count,
 114                        ctrs->send_length, ctrs->recv_length,
 115                        ctrs->route_length, ctrs->drop_length);
 116
 117         if (pos >= min_t(int, len, strlen(tmpstr)))
 118                 rc = 0;
 119         else
 120                 rc = cfs_trace_copyout_string(buffer, nob,
 121                                               tmpstr + pos, "\n");
 122
 123         LIBCFS_FREE(tmpstr, tmpsiz);
 124         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 125         return rc;
 126 }
 127
 128 static int
 129 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 130                 size_t *lenp, loff_t *ppos)
 131 {
 132         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 133                                     __proc_lnet_stats);
 134 }
 135
 136 static int
 137 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 138                  size_t *lenp, loff_t *ppos)
 139 {
 140         const int       tmpsiz = 256;
 141         char            *tmpstr;
 142         char            *s;
 143         int             rc = 0;
 144         int             len;
 145         int             ver;
 146         int             off;
 147
 148         CLASSERT(sizeof(loff_t) >= 4);
 149
 150         off = LNET_PROC_HOFF_GET(*ppos);
 151         ver = LNET_PROC_VER_GET(*ppos);
 152
 153         LASSERT(!write);
 154
 155         if (*lenp == 0)
 156                 return 0;
 157
 158         LIBCFS_ALLOC(tmpstr, tmpsiz);
 159         if (tmpstr == NULL)
 160                 return -ENOMEM;
 161
 162         s = tmpstr; /* points to current position in tmpstr[] */
 163
 164         if (*ppos == 0) {
 165                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 166                               the_lnet.ln_routing ? "enabled" : "disabled");
 167                 LASSERT(tmpstr + tmpsiz - s > 0);
 168
 169                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 170                               "net", "hops", "priority", "state", "router");
 171                 LASSERT(tmpstr + tmpsiz - s > 0);
 172
 173                 lnet_net_lock(0);
 174                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 175                 lnet_net_unlock(0);
 176                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 177         } else {
 178                 struct list_head        *n;
 179                 struct list_head        *r;
 180                 lnet_route_t            *route = NULL;
 181                 lnet_remotenet_t        *rnet  = NULL;
 182                 int                     skip  = off - 1;
 183                 struct list_head        *rn_list;
 184                 int                     i;
 185
 186                 lnet_net_lock(0);
 187
 188                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 189                         lnet_net_unlock(0);
 190                         LIBCFS_FREE(tmpstr, tmpsiz);
 191                         return -ESTALE;
 192                 }
 193
 194                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 195                      i++) {
 196                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 197
 198                         n = rn_list->next;
 199
 200                         while (n != rn_list && route == NULL) {
 201                                 rnet = list_entry(n, lnet_remotenet_t,
 202                                                   lrn_list);
 203
 204                                 r = rnet->lrn_routes.next;
 205
 206                                 while (r != &rnet->lrn_routes) {
 207                                         lnet_route_t *re =
 208                                                 list_entry(r, lnet_route_t,
 209                                                            lr_list);
 210                                         if (skip == 0) {
 211                                                 route = re;
 212                                                 break;
 213                                         }
 214
 215                                         skip--;
 216                                         r = r->next;
 217                                 }
 218
 219                                 n = n->next;
 220                         }
 221                 }
 222
 223                 if (route != NULL) {
 224                         __u32        net        = rnet->lrn_net;
 225                         __u32 hops              = route->lr_hops;
 226                         unsigned int priority   = route->lr_priority;
 227                         lnet_nid_t   nid        = route->lr_gateway->lpni_nid;
 228                         int          alive      = lnet_is_route_alive(route);
 229
 230                         s += snprintf(s, tmpstr + tmpsiz - s,
 231                                       "%-8s %4u %8u %7s %s\n",
 232                                       libcfs_net2str(net), hops,
 233                                       priority,
 234                                       alive ? "up" : "down",
 235                                       libcfs_nid2str(nid));
 236                         LASSERT(tmpstr + tmpsiz - s > 0);
 237                 }
 238
 239                 lnet_net_unlock(0);
 240         }
 241
 242         len = s - tmpstr;     /* how many bytes was written */
 243
 244         if (len > *lenp) {    /* linux-supplied buffer is too small */
 245                 rc = -EINVAL;
 246         } else if (len > 0) { /* wrote something */
 247                 if (copy_to_user(buffer, tmpstr, len))
 248                         rc = -EFAULT;
 249                 else {
 250                         off += 1;
 251                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 252                 }
 253         }
 254
 255         LIBCFS_FREE(tmpstr, tmpsiz);
 256
 257         if (rc == 0)
 258                 *lenp = len;
 259
 260         return rc;
 261 }
 262
 263 static int
 264 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 265                   size_t *lenp, loff_t *ppos)
 266 {
 267         int        rc = 0;
 268         char      *tmpstr;
 269         char      *s;
 270         const int  tmpsiz = 256;
 271         int        len;
 272         int        ver;
 273         int        off;
 274
 275         off = LNET_PROC_HOFF_GET(*ppos);
 276         ver = LNET_PROC_VER_GET(*ppos);
 277
 278         LASSERT(!write);
 279
 280         if (*lenp == 0)
 281                 return 0;
 282
 283         LIBCFS_ALLOC(tmpstr, tmpsiz);
 284         if (tmpstr == NULL)
 285                 return -ENOMEM;
 286
 287         s = tmpstr; /* points to current position in tmpstr[] */
 288
 289         if (*ppos == 0) {
 290                 s += snprintf(s, tmpstr + tmpsiz - s,
 291                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 292                               "ref", "rtr_ref", "alive_cnt", "state",
 293                               "last_ping", "ping_sent", "deadline",
 294                               "down_ni", "router");
 295                 LASSERT(tmpstr + tmpsiz - s > 0);
 296
 297                 lnet_net_lock(0);
 298                 ver = (unsigned int)the_lnet.ln_routers_version;
 299                 lnet_net_unlock(0);
 300                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 301         } else {
 302                 struct list_head *r;
 303                 struct lnet_peer_ni *peer = NULL;
 304                 int               skip = off - 1;
 305
 306                 lnet_net_lock(0);
 307
 308                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 309                         lnet_net_unlock(0);
 310
 311                         LIBCFS_FREE(tmpstr, tmpsiz);
 312                         return -ESTALE;
 313                 }
 314
 315                 r = the_lnet.ln_routers.next;
 316
 317                 while (r != &the_lnet.ln_routers) {
 318                         struct lnet_peer_ni *lp =
 319                           list_entry(r, struct lnet_peer_ni,
 320                                      lpni_rtr_list);
 321
 322                         if (skip == 0) {
 323                                 peer = lp;
 324                                 break;
 325                         }
 326
 327                         skip--;
 328                         r = r->next;
 329                 }
 330
 331                 if (peer != NULL) {
 332                         lnet_nid_t nid = peer->lpni_nid;
 333                         cfs_time_t now = cfs_time_current();
 334                         cfs_time_t deadline = peer->lpni_ping_deadline;
 335                         int nrefs     = atomic_read(&peer->lpni_refcount);
 336                         int nrtrrefs  = peer->lpni_rtr_refcount;
 337                         int alive_cnt = peer->lpni_alive_count;
 338                         int alive     = peer->lpni_alive;
 339                         int pingsent  = !peer->lpni_ping_notsent;
 340                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 341                                                      peer->lpni_ping_timestamp));
 342                         int down_ni   = 0;
 343                         lnet_route_t *rtr;
 344
 345                         if ((peer->lpni_ping_feats &
 346                              LNET_PING_FEAT_NI_STATUS) != 0) {
 347                                 list_for_each_entry(rtr, &peer->lpni_routes,
 348                                                     lr_gwlist) {
 349                                         /* downis on any route should be the
 350                                          * number of downis on the gateway */
 351                                         if (rtr->lr_downis != 0) {
 352                                                 down_ni = rtr->lr_downis;
 353                                                 break;
 354                                         }
 355                                 }
 356                         }
 357
 358                         if (deadline == 0)
 359                                 s += snprintf(s, tmpstr + tmpsiz - s,
 360                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 361                                               nrefs, nrtrrefs, alive_cnt,
 362                                               alive ? "up" : "down", last_ping,
 363                                               pingsent, "NA", down_ni,
 364                                               libcfs_nid2str(nid));
 365                         else
 366                                 s += snprintf(s, tmpstr + tmpsiz - s,
 367                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 368                                               nrefs, nrtrrefs, alive_cnt,
 369                                               alive ? "up" : "down", last_ping,
 370                                               pingsent,
 371                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 372                                               down_ni, libcfs_nid2str(nid));
 373                         LASSERT(tmpstr + tmpsiz - s > 0);
 374                 }
 375
 376                 lnet_net_unlock(0);
 377         }
 378
 379         len = s - tmpstr;     /* how many bytes was written */
 380
 381         if (len > *lenp) {    /* linux-supplied buffer is too small */
 382                 rc = -EINVAL;
 383         } else if (len > 0) { /* wrote something */
 384                 if (copy_to_user(buffer, tmpstr, len))
 385                         rc = -EFAULT;
 386                 else {
 387                         off += 1;
 388                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 389                 }
 390         }
 391
 392         LIBCFS_FREE(tmpstr, tmpsiz);
 393
 394         if (rc == 0)
 395                 *lenp = len;
 396
 397         return rc;
 398 }
 399
 400 /* TODO: there should be no direct access to ptable. We should add a set
 401  * of APIs that give access to the ptable and its members */
 402 static int
 403 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 404                 size_t *lenp, loff_t *ppos)
 405 {
 406         const int               tmpsiz  = 256;
 407         struct lnet_peer_table  *ptable;
 408         char                    *tmpstr;
 409         char                    *s;
 410         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 411         int                     ver  = LNET_PROC_VER_GET(*ppos);
 412         int                     hash = LNET_PROC_HASH_GET(*ppos);
 413         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 414         int                     rc = 0;
 415         int                     len;
 416
 417         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 418         LASSERT(!write);
 419
 420         if (*lenp == 0)
 421                 return 0;
 422
 423         if (cpt >= LNET_CPT_NUMBER) {
 424                 *lenp = 0;
 425                 return 0;
 426         }
 427
 428         LIBCFS_ALLOC(tmpstr, tmpsiz);
 429         if (tmpstr == NULL)
 430                 return -ENOMEM;
 431
 432         s = tmpstr; /* points to current position in tmpstr[] */
 433
 434         if (*ppos == 0) {
 435                 s += snprintf(s, tmpstr + tmpsiz - s,
 436                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 437                               "nid", "refs", "state", "last", "max",
 438                               "rtr", "min", "tx", "min", "queue");
 439                 LASSERT(tmpstr + tmpsiz - s > 0);
 440
 441                 hoff++;
 442         } else {
 443                 struct lnet_peer_ni     *peer;
 444                 struct list_head        *p;
 445                 int                     skip;
 446  again:
 447                 p = NULL;
 448                 peer = NULL;
 449                 skip = hoff - 1;
 450
 451                 lnet_net_lock(cpt);
 452                 ptable = the_lnet.ln_peer_tables[cpt];
 453                 if (hoff == 1)
 454                         ver = LNET_PROC_VERSION(ptable->pt_version);
 455
 456                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 457                         lnet_net_unlock(cpt);
 458                         LIBCFS_FREE(tmpstr, tmpsiz);
 459                         return -ESTALE;
 460                 }
 461
 462                 while (hash < LNET_PEER_HASH_SIZE) {
 463                         if (p == NULL)
 464                                 p = ptable->pt_hash[hash].next;
 465
 466                         while (p != &ptable->pt_hash[hash]) {
 467                                 struct lnet_peer_ni *lp =
 468                                   list_entry(p, struct lnet_peer_ni,
 469                                              lpni_hashlist);
 470                                 if (skip == 0) {
 471                                         peer = lp;
 472
 473                                         /* minor optimization: start from idx+1
 474                                          * on next iteration if we've just
 475                                          * drained lpni_hashlist */
 476                                         if (lp->lpni_hashlist.next ==
 477                                             &ptable->pt_hash[hash]) {
 478                                                 hoff = 1;
 479                                                 hash++;
 480                                         } else {
 481                                                 hoff++;
 482                                         }
 483
 484                                         break;
 485                                 }
 486
 487                                 skip--;
 488                                 p = lp->lpni_hashlist.next;
 489                         }
 490
 491                         if (peer != NULL)
 492                                 break;
 493
 494                         p = NULL;
 495                         hoff = 1;
 496                         hash++;
 497                 }
 498
 499                 if (peer != NULL) {
 500                         lnet_nid_t nid = peer->lpni_nid;
 501                         int nrefs = atomic_read(&peer->lpni_refcount);
 502                         int lastalive = -1;
 503                         char *aliveness = "NA";
 504                         int maxcr = peer->lpni_net->net_tunables.lct_peer_tx_credits;
 505                         int txcr = peer->lpni_txcredits;
 506                         int mintxcr = peer->lpni_mintxcredits;
 507                         int rtrcr = peer->lpni_rtrcredits;
 508                         int minrtrcr = peer->lpni_minrtrcredits;
 509                         int txqnob = peer->lpni_txqnob;
 510
 511                         if (lnet_isrouter(peer) ||
 512                             lnet_peer_aliveness_enabled(peer))
 513                                 aliveness = peer->lpni_alive ? "up" : "down";
 514
 515                         if (lnet_peer_aliveness_enabled(peer)) {
 516                                 cfs_time_t     now = cfs_time_current();
 517                                 cfs_duration_t delta;
 518
 519                                 delta = cfs_time_sub(now, peer->lpni_last_alive);
 520                                 lastalive = cfs_duration_sec(delta);
 521
 522                                 /* No need to mess up peers contents with
 523                                  * arbitrarily long integers - it suffices to
 524                                  * know that lastalive is more than 10000s old
 525                                  */
 526                                 if (lastalive >= 10000)
 527                                         lastalive = 9999;
 528                         }
 529
 530                         lnet_net_unlock(cpt);
 531
 532                         s += snprintf(s, tmpstr + tmpsiz - s,
 533                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 534                                       libcfs_nid2str(nid), nrefs, aliveness,
 535                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 536                                       mintxcr, txqnob);
 537                         LASSERT(tmpstr + tmpsiz - s > 0);
 538
 539                 } else { /* peer is NULL */
 540                         lnet_net_unlock(cpt);
 541                 }
 542
 543                 if (hash == LNET_PEER_HASH_SIZE) {
 544                         cpt++;
 545                         hash = 0;
 546                         hoff = 1;
 547                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 548                                 goto again;
 549                 }
 550         }
 551
 552         len = s - tmpstr;     /* how many bytes was written */
 553
 554         if (len > *lenp) {    /* linux-supplied buffer is too small */
 555                 rc = -EINVAL;
 556         } else if (len > 0) { /* wrote something */
 557                 if (copy_to_user(buffer, tmpstr, len))
 558                         rc = -EFAULT;
 559                 else
 560                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 561         }
 562
 563         LIBCFS_FREE(tmpstr, tmpsiz);
 564
 565         if (rc == 0)
 566                 *lenp = len;
 567
 568         return rc;
 569 }
 570
 571 static int __proc_lnet_buffers(void *data, int write,
 572                                loff_t pos, void __user *buffer, int nob)
 573 {
 574         char            *s;
 575         char            *tmpstr;
 576         int             tmpsiz;
 577         int             idx;
 578         int             len;
 579         int             rc;
 580         int             i;
 581
 582         LASSERT(!write);
 583
 584         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 585         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 586         LIBCFS_ALLOC(tmpstr, tmpsiz);
 587         if (tmpstr == NULL)
 588                 return -ENOMEM;
 589
 590         s = tmpstr; /* points to current position in tmpstr[] */
 591
 592         s += snprintf(s, tmpstr + tmpsiz - s,
 593                       "%5s %5s %7s %7s\n",
 594                       "pages", "count", "credits", "min");
 595         LASSERT(tmpstr + tmpsiz - s > 0);
 596
 597         if (the_lnet.ln_rtrpools == NULL)
 598                 goto out; /* I'm not a router */
 599
 600         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 601                 lnet_rtrbufpool_t *rbp;
 602
 603                 lnet_net_lock(LNET_LOCK_EX);
 604                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 605                         s += snprintf(s, tmpstr + tmpsiz - s,
 606                                       "%5d %5d %7d %7d\n",
 607                                       rbp[idx].rbp_npages,
 608                                       rbp[idx].rbp_nbuffers,
 609                                       rbp[idx].rbp_credits,
 610                                       rbp[idx].rbp_mincredits);
 611                         LASSERT(tmpstr + tmpsiz - s > 0);
 612                 }
 613                 lnet_net_unlock(LNET_LOCK_EX);
 614         }
 615
 616  out:
 617         len = s - tmpstr;
 618
 619         if (pos >= min_t(int, len, strlen(tmpstr)))
 620                 rc = 0;
 621         else
 622                 rc = cfs_trace_copyout_string(buffer, nob,
 623                                               tmpstr + pos, NULL);
 624
 625         LIBCFS_FREE(tmpstr, tmpsiz);
 626         return rc;
 627 }
 628
 629 static int
 630 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 631                   size_t *lenp, loff_t *ppos)
 632 {
 633         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 634                                     __proc_lnet_buffers);
 635 }
 636
 637 static int
 638 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 639               size_t *lenp, loff_t *ppos)
 640 {
 641         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 642         int        rc = 0;
 643         char      *tmpstr;
 644         char      *s;
 645         int        len;
 646
 647         LASSERT(!write);
 648
 649         if (*lenp == 0)
 650                 return 0;
 651
 652         LIBCFS_ALLOC(tmpstr, tmpsiz);
 653         if (tmpstr == NULL)
 654                 return -ENOMEM;
 655
 656         s = tmpstr; /* points to current position in tmpstr[] */
 657
 658         if (*ppos == 0) {
 659                 s += snprintf(s, tmpstr + tmpsiz - s,
 660                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 661                               "nid", "status", "alive", "refs", "peer",
 662                               "rtr", "max", "tx", "min");
 663                 LASSERT (tmpstr + tmpsiz - s > 0);
 664         } else {
 665                 lnet_ni_t         *ni   = NULL;
 666                 int                skip = *ppos - 1;
 667
 668                 lnet_net_lock(0);
 669
 670                 ni = lnet_get_ni_idx_locked(skip);
 671
 672                 if (ni != NULL) {
 673                         struct lnet_tx_queue    *tq;
 674                         char    *stat;
 675                         time64_t now = ktime_get_real_seconds();
 676                         int     last_alive = -1;
 677                         int     i;
 678                         int     j;
 679
 680                         if (the_lnet.ln_routing)
 681                                 last_alive = now - ni->ni_last_alive;
 682
 683                         /* @lo forever alive */
 684                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 685                                 last_alive = 0;
 686
 687                         lnet_ni_lock(ni);
 688                         LASSERT(ni->ni_status != NULL);
 689                         stat = (ni->ni_status->ns_status ==
 690                                 LNET_NI_STATUS_UP) ? "up" : "down";
 691                         lnet_ni_unlock(ni);
 692
 693                         /* we actually output credits information for
 694                          * TX queue of each partition */
 695                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 696                                 for (j = 0; ni->ni_cpts != NULL &&
 697                                      j < ni->ni_ncpts; j++) {
 698                                         if (i == ni->ni_cpts[j])
 699                                                 break;
 700                                 }
 701
 702                                 if (j == ni->ni_ncpts)
 703                                         continue;
 704
 705                                 if (i != 0)
 706                                         lnet_net_lock(i);
 707
 708                                 s += snprintf(s, tmpstr + tmpsiz - s,
 709                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 710                                       libcfs_nid2str(ni->ni_nid), stat,
 711                                       last_alive, *ni->ni_refs[i],
 712                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 713                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 714                                       tq->tq_credits_max,
 715                                       tq->tq_credits, tq->tq_credits_min);
 716                                 if (i != 0)
 717                                         lnet_net_unlock(i);
 718                         }
 719                         LASSERT(tmpstr + tmpsiz - s > 0);
 720                 }
 721
 722                 lnet_net_unlock(0);
 723         }
 724
 725         len = s - tmpstr;     /* how many bytes was written */
 726
 727         if (len > *lenp) {    /* linux-supplied buffer is too small */
 728                 rc = -EINVAL;
 729         } else if (len > 0) { /* wrote something */
 730                 if (copy_to_user(buffer, tmpstr, len))
 731                         rc = -EFAULT;
 732                 else
 733                         *ppos += 1;
 734         }
 735
 736         LIBCFS_FREE(tmpstr, tmpsiz);
 737
 738         if (rc == 0)
 739                 *lenp = len;
 740
 741         return rc;
 742 }
 743
 744 struct lnet_portal_rotors {
 745         int             pr_value;
 746         const char      *pr_name;
 747         const char      *pr_desc;
 748 };
 749
 750 static struct lnet_portal_rotors        portal_rotors[] = {
 751         {
 752                 .pr_value = LNET_PTL_ROTOR_OFF,
 753                 .pr_name  = "OFF",
 754                 .pr_desc  = "Turn off message rotor for wildcard portals"
 755         },
 756         {
 757                 .pr_value = LNET_PTL_ROTOR_ON,
 758                 .pr_name  = "ON",
 759                 .pr_desc  = "round-robin dispatch all PUT messages for "
 760                             "wildcard portals"
 761         },
 762         {
 763                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 764                 .pr_name  = "RR_RT",
 765                 .pr_desc  = "round-robin dispatch routed PUT message for "
 766                             "wildcard portals"
 767         },
 768         {
 769                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 770                 .pr_name  = "HASH_RT",
 771                 .pr_desc  = "dispatch routed PUT message by hashing source "
 772                             "NID for wildcard portals"
 773         },
 774         {
 775                 .pr_value = -1,
 776                 .pr_name  = NULL,
 777                 .pr_desc  = NULL
 778         },
 779 };
 780
 781 static int __proc_lnet_portal_rotor(void *data, int write,
 782                                     loff_t pos, void __user *buffer, int nob)
 783 {
 784         const int       buf_len = 128;
 785         char            *buf;
 786         char            *tmp;
 787         int             rc;
 788         int             i;
 789
 790         LIBCFS_ALLOC(buf, buf_len);
 791         if (buf == NULL)
 792                 return -ENOMEM;
 793
 794         if (!write) {
 795                 lnet_res_lock(0);
 796
 797                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 798                         if (portal_rotors[i].pr_value == portal_rotor)
 799                                 break;
 800                 }
 801
 802                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 803                 lnet_res_unlock(0);
 804
 805                 rc = snprintf(buf, buf_len,
 806                               "{\n\tportals: all\n"
 807                               "\trotor: %s\n\tdescription: %s\n}",
 808                               portal_rotors[i].pr_name,
 809                               portal_rotors[i].pr_desc);
 810
 811                 if (pos >= min_t(int, rc, buf_len)) {
 812                         rc = 0;
 813                 } else {
 814                         rc = cfs_trace_copyout_string(buffer, nob,
 815                                         buf + pos, "\n");
 816                 }
 817                 goto out;
 818         }
 819
 820         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 821         if (rc < 0)
 822                 goto out;
 823
 824         tmp = cfs_trimwhite(buf);
 825
 826         rc = -EINVAL;
 827         lnet_res_lock(0);
 828         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 829                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 830                                 strlen(portal_rotors[i].pr_name)) == 0) {
 831                         portal_rotor = portal_rotors[i].pr_value;
 832                         rc = 0;
 833                         break;
 834                 }
 835         }
 836         lnet_res_unlock(0);
 837 out:
 838         LIBCFS_FREE(buf, buf_len);
 839         return rc;
 840 }
 841
 842 static int
 843 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 844                        size_t *lenp, loff_t *ppos)
 845 {
 846         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 847                                     __proc_lnet_portal_rotor);
 848 }
 849
 850
 851 static struct ctl_table lnet_table[] = {
 852         /*
 853          * NB No .strategy entries have been provided since sysctl(8) prefers
 854          * to go via /proc for portability.
 855          */
 856         {
 857                 INIT_CTL_NAME
 858                 .procname       = "stats",
 859                 .mode           = 0644,
 860                 .proc_handler   = &proc_lnet_stats,
 861         },
 862         {
 863                 INIT_CTL_NAME
 864                 .procname       = "routes",
 865                 .mode           = 0444,
 866                 .proc_handler   = &proc_lnet_routes,
 867         },
 868         {
 869                 INIT_CTL_NAME
 870                 .procname       = "routers",
 871                 .mode           = 0444,
 872                 .proc_handler   = &proc_lnet_routers,
 873         },
 874         {
 875                 INIT_CTL_NAME
 876                 .procname       = "peers",
 877                 .mode           = 0444,
 878                 .proc_handler   = &proc_lnet_peers,
 879         },
 880         {
 881                 INIT_CTL_NAME
 882                 .procname       = "buffers",
 883                 .mode           = 0444,
 884                 .proc_handler   = &proc_lnet_buffers,
 885         },
 886         {
 887                 INIT_CTL_NAME
 888                 .procname       = "nis",
 889                 .mode           = 0444,
 890                 .proc_handler   = &proc_lnet_nis,
 891         },
 892         {
 893                 INIT_CTL_NAME
 894                 .procname       = "portal_rotor",
 895                 .mode           = 0644,
 896                 .proc_handler   = &proc_lnet_portal_rotor,
 897         },
 898         { 0 }
 899 };
 900
 901 static struct ctl_table top_table[] = {
 902         {
 903                 INIT_CTL_NAME
 904                 .procname       = "lnet",
 905                 .mode           = 0555,
 906                 .data           = NULL,
 907                 .maxlen         = 0,
 908                 .child          = lnet_table,
 909         },
 910         { 0 }
 911 };
 912
 913 void
 914 lnet_proc_init(void)
 915 {
 916 #ifdef CONFIG_SYSCTL
 917         if (lnet_table_header == NULL)
 918                 lnet_table_header = register_sysctl_table(top_table);
 919 #endif
 920 }
 921
 922 void
 923 lnet_proc_fini(void)
 924 {
 925 #ifdef CONFIG_SYSCTL
 926         if (lnet_table_header != NULL)
 927                 unregister_sysctl_table(lnet_table_header);
 928
 929         lnet_table_header = NULL;
 930 #endif
 931 }