lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2017, 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
  25 #include <linux/uaccess.h>
  26
  27 #include <libcfs/libcfs.h>
  28 #include <lnet/lib-lnet.h>
  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 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  34 /*
  35  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  36  */
  37 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  38 /* change version, 16 bits or 8 bits */
  39 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  40
  41 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  42 /*
  43  * bits for peer hash offset
  44  * NB: we don't use the highest bit of *ppos because it's signed
  45  */
  46 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  47                                  LNET_PROC_CPT_BITS -    \
  48                                  LNET_PROC_VER_BITS -    \
  49                                  LNET_PROC_HASH_BITS - 1)
  50 /* bits for hash index + position */
  51 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  52 /* bits for peer hash table + hash version */
  53 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  54
  55 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  56 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  57 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  58 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  59
  60 #define LNET_PROC_CPT_GET(pos)                          \
  61         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  62
  63 #define LNET_PROC_VER_GET(pos)                          \
  64         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  65
  66 #define LNET_PROC_HASH_GET(pos)                         \
  67         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  68
  69 #define LNET_PROC_HOFF_GET(pos)                         \
  70         (int)((pos) & LNET_PROC_HOFF_MASK)
  71
  72 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  73         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  74         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  75         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  76         ((off) & LNET_PROC_HOFF_MASK))
  77
  78 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  79
  80 static int __proc_lnet_stats(void *data, int write,
  81                              loff_t pos, void __user *buffer, int nob)
  82 {
  83         int              rc;
  84         struct lnet_counters *ctrs;
  85         int              len;
  86         char            *tmpstr;
  87         const int        tmpsiz = 256; /* 7 %u and 4 __u64 */
  88
  89         if (write) {
  90                 lnet_counters_reset();
  91                 return 0;
  92         }
  93
  94         /* read */
  95
  96         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  97         if (ctrs == NULL)
  98                 return -ENOMEM;
  99
 100         LIBCFS_ALLOC(tmpstr, tmpsiz);
 101         if (tmpstr == NULL) {
 102                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 103                 return -ENOMEM;
 104         }
 105
 106         lnet_counters_get(ctrs);
 107
 108         len = snprintf(tmpstr, tmpsiz,
 109                        "%u %u %u %u %u %u %u %llu %llu "
 110                        "%llu %llu",
 111                        ctrs->msgs_alloc, ctrs->msgs_max,
 112                        ctrs->errors,
 113                        ctrs->send_count, ctrs->recv_count,
 114                        ctrs->route_count, ctrs->drop_count,
 115                        ctrs->send_length, ctrs->recv_length,
 116                        ctrs->route_length, ctrs->drop_length);
 117
 118         if (pos >= min_t(int, len, strlen(tmpstr)))
 119                 rc = 0;
 120         else
 121                 rc = cfs_trace_copyout_string(buffer, nob,
 122                                               tmpstr + pos, "\n");
 123
 124         LIBCFS_FREE(tmpstr, tmpsiz);
 125         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 126         return rc;
 127 }
 128
 129 static int
 130 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 131                 size_t *lenp, loff_t *ppos)
 132 {
 133         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 134                                     __proc_lnet_stats);
 135 }
 136
 137 static int
 138 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 139                  size_t *lenp, loff_t *ppos)
 140 {
 141         const int       tmpsiz = 256;
 142         char            *tmpstr;
 143         char            *s;
 144         int             rc = 0;
 145         int             len;
 146         int             ver;
 147         int             off;
 148
 149         CLASSERT(sizeof(loff_t) >= 4);
 150
 151         off = LNET_PROC_HOFF_GET(*ppos);
 152         ver = LNET_PROC_VER_GET(*ppos);
 153
 154         LASSERT(!write);
 155
 156         if (*lenp == 0)
 157                 return 0;
 158
 159         LIBCFS_ALLOC(tmpstr, tmpsiz);
 160         if (tmpstr == NULL)
 161                 return -ENOMEM;
 162
 163         s = tmpstr; /* points to current position in tmpstr[] */
 164
 165         if (*ppos == 0) {
 166                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 167                               the_lnet.ln_routing ? "enabled" : "disabled");
 168                 LASSERT(tmpstr + tmpsiz - s > 0);
 169
 170                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 171                               "net", "hops", "priority", "state", "router");
 172                 LASSERT(tmpstr + tmpsiz - s > 0);
 173
 174                 lnet_net_lock(0);
 175                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 176                 lnet_net_unlock(0);
 177                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 178         } else {
 179                 struct list_head        *n;
 180                 struct list_head        *r;
 181                 struct lnet_route               *route = NULL;
 182                 struct lnet_remotenet   *rnet  = NULL;
 183                 int                     skip  = off - 1;
 184                 struct list_head        *rn_list;
 185                 int                     i;
 186
 187                 lnet_net_lock(0);
 188
 189                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 190                         lnet_net_unlock(0);
 191                         LIBCFS_FREE(tmpstr, tmpsiz);
 192                         return -ESTALE;
 193                 }
 194
 195                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 196                      i++) {
 197                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 198
 199                         n = rn_list->next;
 200
 201                         while (n != rn_list && route == NULL) {
 202                                 rnet = list_entry(n, struct lnet_remotenet,
 203                                                   lrn_list);
 204
 205                                 r = rnet->lrn_routes.next;
 206
 207                                 while (r != &rnet->lrn_routes) {
 208                                         struct lnet_route *re =
 209                                                 list_entry(r, struct lnet_route,
 210                                                            lr_list);
 211                                         if (skip == 0) {
 212                                                 route = re;
 213                                                 break;
 214                                         }
 215
 216                                         skip--;
 217                                         r = r->next;
 218                                 }
 219
 220                                 n = n->next;
 221                         }
 222                 }
 223
 224                 if (route != NULL) {
 225                         __u32        net        = rnet->lrn_net;
 226                         __u32 hops              = route->lr_hops;
 227                         unsigned int priority   = route->lr_priority;
 228                         lnet_nid_t   nid        = route->lr_gateway->lpni_nid;
 229                         int          alive      = lnet_is_route_alive(route);
 230
 231                         s += snprintf(s, tmpstr + tmpsiz - s,
 232                                       "%-8s %4d %8u %7s %s\n",
 233                                       libcfs_net2str(net), hops,
 234                                       priority,
 235                                       alive ? "up" : "down",
 236                                       libcfs_nid2str(nid));
 237                         LASSERT(tmpstr + tmpsiz - s > 0);
 238                 }
 239
 240                 lnet_net_unlock(0);
 241         }
 242
 243         len = s - tmpstr;     /* how many bytes was written */
 244
 245         if (len > *lenp) {    /* linux-supplied buffer is too small */
 246                 rc = -EINVAL;
 247         } else if (len > 0) { /* wrote something */
 248                 if (copy_to_user(buffer, tmpstr, len))
 249                         rc = -EFAULT;
 250                 else {
 251                         off += 1;
 252                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 253                 }
 254         }
 255
 256         LIBCFS_FREE(tmpstr, tmpsiz);
 257
 258         if (rc == 0)
 259                 *lenp = len;
 260
 261         return rc;
 262 }
 263
 264 static int
 265 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 266                   size_t *lenp, loff_t *ppos)
 267 {
 268         int        rc = 0;
 269         char      *tmpstr;
 270         char      *s;
 271         const int  tmpsiz = 256;
 272         int        len;
 273         int        ver;
 274         int        off;
 275
 276         off = LNET_PROC_HOFF_GET(*ppos);
 277         ver = LNET_PROC_VER_GET(*ppos);
 278
 279         LASSERT(!write);
 280
 281         if (*lenp == 0)
 282                 return 0;
 283
 284         LIBCFS_ALLOC(tmpstr, tmpsiz);
 285         if (tmpstr == NULL)
 286                 return -ENOMEM;
 287
 288         s = tmpstr; /* points to current position in tmpstr[] */
 289
 290         if (*ppos == 0) {
 291                 s += snprintf(s, tmpstr + tmpsiz - s,
 292                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 293                               "ref", "rtr_ref", "alive_cnt", "state",
 294                               "last_ping", "ping_sent", "deadline",
 295                               "down_ni", "router");
 296                 LASSERT(tmpstr + tmpsiz - s > 0);
 297
 298                 lnet_net_lock(0);
 299                 ver = (unsigned int)the_lnet.ln_routers_version;
 300                 lnet_net_unlock(0);
 301                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 302         } else {
 303                 struct list_head *r;
 304                 struct lnet_peer_ni *peer = NULL;
 305                 int               skip = off - 1;
 306
 307                 lnet_net_lock(0);
 308
 309                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 310                         lnet_net_unlock(0);
 311
 312                         LIBCFS_FREE(tmpstr, tmpsiz);
 313                         return -ESTALE;
 314                 }
 315
 316                 r = the_lnet.ln_routers.next;
 317
 318                 while (r != &the_lnet.ln_routers) {
 319                         struct lnet_peer_ni *lp =
 320                           list_entry(r, struct lnet_peer_ni,
 321                                      lpni_rtr_list);
 322
 323                         if (skip == 0) {
 324                                 peer = lp;
 325                                 break;
 326                         }
 327
 328                         skip--;
 329                         r = r->next;
 330                 }
 331
 332                 if (peer != NULL) {
 333                         lnet_nid_t nid = peer->lpni_nid;
 334                         time64_t now = ktime_get_seconds();
 335                         time64_t deadline = peer->lpni_ping_deadline;
 336                         int nrefs     = atomic_read(&peer->lpni_refcount);
 337                         int nrtrrefs  = peer->lpni_rtr_refcount;
 338                         int alive_cnt = peer->lpni_alive_count;
 339                         int alive     = peer->lpni_alive;
 340                         int pingsent  = !peer->lpni_ping_notsent;
 341                         time64_t last_ping = now - peer->lpni_ping_timestamp;
 342                         int down_ni   = 0;
 343                         struct lnet_route *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 %12llu %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 %12llu %9d %8llu %7d %s\n",
 368                                               nrefs, nrtrrefs, alive_cnt,
 369                                               alive ? "up" : "down", last_ping,
 370                                               pingsent,
 371                                               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 = NULL;
 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         if (write) {
 418                 int i;
 419                 struct lnet_peer_ni *peer;
 420
 421                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
 422                         lnet_net_lock(i);
 423                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
 424                                 list_for_each_entry(peer,
 425                                                     &ptable->pt_hash[hash],
 426                                                     lpni_hashlist) {
 427                                         peer->lpni_mintxcredits =
 428                                                 peer->lpni_txcredits;
 429                                         peer->lpni_minrtrcredits =
 430                                                 peer->lpni_rtrcredits;
 431                                 }
 432                         }
 433                         lnet_net_unlock(i);
 434                 }
 435                 *ppos += *lenp;
 436                 return 0;
 437         }
 438
 439         if (*lenp == 0)
 440                 return 0;
 441
 442         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 443
 444         if (cpt >= LNET_CPT_NUMBER) {
 445                 *lenp = 0;
 446                 return 0;
 447         }
 448
 449         LIBCFS_ALLOC(tmpstr, tmpsiz);
 450         if (tmpstr == NULL)
 451                 return -ENOMEM;
 452
 453         s = tmpstr; /* points to current position in tmpstr[] */
 454
 455         if (*ppos == 0) {
 456                 s += snprintf(s, tmpstr + tmpsiz - s,
 457                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 458                               "nid", "refs", "state", "last", "max",
 459                               "rtr", "min", "tx", "min", "queue");
 460                 LASSERT(tmpstr + tmpsiz - s > 0);
 461
 462                 hoff++;
 463         } else {
 464                 struct lnet_peer_ni     *peer;
 465                 struct list_head        *p;
 466                 int                     skip;
 467
 468  again:
 469                 p = NULL;
 470                 peer = NULL;
 471                 skip = hoff - 1;
 472
 473                 lnet_net_lock(cpt);
 474                 ptable = the_lnet.ln_peer_tables[cpt];
 475                 if (hoff == 1)
 476                         ver = LNET_PROC_VERSION(ptable->pt_version);
 477
 478                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 479                         lnet_net_unlock(cpt);
 480                         LIBCFS_FREE(tmpstr, tmpsiz);
 481                         return -ESTALE;
 482                 }
 483
 484                 while (hash < LNET_PEER_HASH_SIZE) {
 485                         if (p == NULL)
 486                                 p = ptable->pt_hash[hash].next;
 487
 488                         while (p != &ptable->pt_hash[hash]) {
 489                                 struct lnet_peer_ni *lp =
 490                                   list_entry(p, struct lnet_peer_ni,
 491                                              lpni_hashlist);
 492                                 if (skip == 0) {
 493                                         peer = lp;
 494
 495                                         /* minor optimization: start from idx+1
 496                                          * on next iteration if we've just
 497                                          * drained lpni_hashlist */
 498                                         if (lp->lpni_hashlist.next ==
 499                                             &ptable->pt_hash[hash]) {
 500                                                 hoff = 1;
 501                                                 hash++;
 502                                         } else {
 503                                                 hoff++;
 504                                         }
 505
 506                                         break;
 507                                 }
 508
 509                                 skip--;
 510                                 p = lp->lpni_hashlist.next;
 511                         }
 512
 513                         if (peer != NULL)
 514                                 break;
 515
 516                         p = NULL;
 517                         hoff = 1;
 518                         hash++;
 519                 }
 520
 521                 if (peer != NULL) {
 522                         lnet_nid_t nid = peer->lpni_nid;
 523                         int nrefs = atomic_read(&peer->lpni_refcount);
 524                         time64_t lastalive = -1;
 525                         char *aliveness = "NA";
 526                         int maxcr = (peer->lpni_net) ?
 527                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 528                         int txcr = peer->lpni_txcredits;
 529                         int mintxcr = peer->lpni_mintxcredits;
 530                         int rtrcr = peer->lpni_rtrcredits;
 531                         int minrtrcr = peer->lpni_minrtrcredits;
 532                         int txqnob = peer->lpni_txqnob;
 533
 534                         if (lnet_isrouter(peer) ||
 535                             lnet_peer_aliveness_enabled(peer))
 536                                 aliveness = peer->lpni_alive ? "up" : "down";
 537
 538                         if (lnet_peer_aliveness_enabled(peer)) {
 539                                 time64_t now = ktime_get_seconds();
 540
 541                                 lastalive = now - peer->lpni_last_alive;
 542
 543                                 /* No need to mess up peers contents with
 544                                  * arbitrarily long integers - it suffices to
 545                                  * know that lastalive is more than 10000s old
 546                                  */
 547                                 if (lastalive >= 10000)
 548                                         lastalive = 9999;
 549                         }
 550
 551                         lnet_net_unlock(cpt);
 552
 553                         s += snprintf(s, tmpstr + tmpsiz - s,
 554                                       "%-24s %4d %5s %5lld %5d %5d %5d %5d %5d %d\n",
 555                                       libcfs_nid2str(nid), nrefs, aliveness,
 556                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 557                                       mintxcr, txqnob);
 558                         LASSERT(tmpstr + tmpsiz - s > 0);
 559
 560                 } else { /* peer is NULL */
 561                         lnet_net_unlock(cpt);
 562                 }
 563
 564                 if (hash == LNET_PEER_HASH_SIZE) {
 565                         cpt++;
 566                         hash = 0;
 567                         hoff = 1;
 568                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 569                                 goto again;
 570                 }
 571         }
 572
 573         len = s - tmpstr;     /* how many bytes was written */
 574
 575         if (len > *lenp) {    /* linux-supplied buffer is too small */
 576                 rc = -EINVAL;
 577         } else if (len > 0) { /* wrote something */
 578                 if (copy_to_user(buffer, tmpstr, len))
 579                         rc = -EFAULT;
 580                 else
 581                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 582         }
 583
 584         LIBCFS_FREE(tmpstr, tmpsiz);
 585
 586         if (rc == 0)
 587                 *lenp = len;
 588
 589         return rc;
 590 }
 591
 592 static int __proc_lnet_buffers(void *data, int write,
 593                                loff_t pos, void __user *buffer, int nob)
 594 {
 595         char            *s;
 596         char            *tmpstr;
 597         int             tmpsiz;
 598         int             idx;
 599         int             len;
 600         int             rc;
 601         int             i;
 602
 603         LASSERT(!write);
 604
 605         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 606         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 607         LIBCFS_ALLOC(tmpstr, tmpsiz);
 608         if (tmpstr == NULL)
 609                 return -ENOMEM;
 610
 611         s = tmpstr; /* points to current position in tmpstr[] */
 612
 613         s += snprintf(s, tmpstr + tmpsiz - s,
 614                       "%5s %5s %7s %7s\n",
 615                       "pages", "count", "credits", "min");
 616         LASSERT(tmpstr + tmpsiz - s > 0);
 617
 618         if (the_lnet.ln_rtrpools == NULL)
 619                 goto out; /* I'm not a router */
 620
 621         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 622                 struct lnet_rtrbufpool *rbp;
 623
 624                 lnet_net_lock(LNET_LOCK_EX);
 625                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 626                         s += snprintf(s, tmpstr + tmpsiz - s,
 627                                       "%5d %5d %7d %7d\n",
 628                                       rbp[idx].rbp_npages,
 629                                       rbp[idx].rbp_nbuffers,
 630                                       rbp[idx].rbp_credits,
 631                                       rbp[idx].rbp_mincredits);
 632                         LASSERT(tmpstr + tmpsiz - s > 0);
 633                 }
 634                 lnet_net_unlock(LNET_LOCK_EX);
 635         }
 636
 637  out:
 638         len = s - tmpstr;
 639
 640         if (pos >= min_t(int, len, strlen(tmpstr)))
 641                 rc = 0;
 642         else
 643                 rc = cfs_trace_copyout_string(buffer, nob,
 644                                               tmpstr + pos, NULL);
 645
 646         LIBCFS_FREE(tmpstr, tmpsiz);
 647         return rc;
 648 }
 649
 650 static int
 651 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 652                   size_t *lenp, loff_t *ppos)
 653 {
 654         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 655                                     __proc_lnet_buffers);
 656 }
 657
 658 static int
 659 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 660               size_t *lenp, loff_t *ppos)
 661 {
 662         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 663         int     rc = 0;
 664         char    *tmpstr;
 665         char    *s;
 666         int     len;
 667
 668         if (*lenp == 0)
 669                 return 0;
 670
 671         if (write) {
 672                 /* Just reset the min stat. */
 673                 struct lnet_ni  *ni;
 674                 struct lnet_net *net;
 675
 676                 lnet_net_lock(0);
 677
 678                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
 679                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 680                                 struct lnet_tx_queue *tq;
 681                                 int i;
 682                                 int j;
 683
 684                                 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 685                                         for (j = 0; ni->ni_cpts != NULL &&
 686                                              j < ni->ni_ncpts; j++) {
 687                                                 if (i == ni->ni_cpts[j])
 688                                                         break;
 689                                         }
 690
 691                                         if (j == ni->ni_ncpts)
 692                                                 continue;
 693
 694                                         if (i != 0)
 695                                                 lnet_net_lock(i);
 696                                         tq->tq_credits_min = tq->tq_credits;
 697                                         if (i != 0)
 698                                                 lnet_net_unlock(i);
 699                                 }
 700                         }
 701                 }
 702                 lnet_net_unlock(0);
 703                 *ppos += *lenp;
 704                 return 0;
 705         }
 706
 707         LIBCFS_ALLOC(tmpstr, tmpsiz);
 708         if (tmpstr == NULL)
 709                 return -ENOMEM;
 710
 711         s = tmpstr; /* points to current position in tmpstr[] */
 712
 713         if (*ppos == 0) {
 714                 s += snprintf(s, tmpstr + tmpsiz - s,
 715                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 716                               "nid", "status", "alive", "refs", "peer",
 717                               "rtr", "max", "tx", "min");
 718                 LASSERT (tmpstr + tmpsiz - s > 0);
 719         } else {
 720                 struct lnet_ni *ni   = NULL;
 721                 int skip = *ppos - 1;
 722
 723                 lnet_net_lock(0);
 724
 725                 ni = lnet_get_ni_idx_locked(skip);
 726
 727                 if (ni != NULL) {
 728                         struct lnet_tx_queue *tq;
 729                         char *stat;
 730                         time64_t now = ktime_get_real_seconds();
 731                         time64_t last_alive = -1;
 732                         int i;
 733                         int j;
 734
 735                         if (the_lnet.ln_routing)
 736                                 last_alive = now - ni->ni_last_alive;
 737
 738                         /* @lo forever alive */
 739                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 740                                 last_alive = 0;
 741
 742                         lnet_ni_lock(ni);
 743                         LASSERT(ni->ni_status != NULL);
 744                         stat = (ni->ni_status->ns_status ==
 745                                 LNET_NI_STATUS_UP) ? "up" : "down";
 746                         lnet_ni_unlock(ni);
 747
 748                         /* we actually output credits information for
 749                          * TX queue of each partition */
 750                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 751                                 for (j = 0; ni->ni_cpts != NULL &&
 752                                      j < ni->ni_ncpts; j++) {
 753                                         if (i == ni->ni_cpts[j])
 754                                                 break;
 755                                 }
 756
 757                                 if (j == ni->ni_ncpts)
 758                                         continue;
 759
 760                                 if (i != 0)
 761                                         lnet_net_lock(i);
 762
 763                                 s += snprintf(s, tmpstr + tmpsiz - s,
 764                                       "%-24s %6s %5lld %4d %4d %4d %5d %5d %5d\n",
 765                                       libcfs_nid2str(ni->ni_nid), stat,
 766                                       last_alive, *ni->ni_refs[i],
 767                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 768                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 769                                       tq->tq_credits_max,
 770                                       tq->tq_credits, tq->tq_credits_min);
 771                                 if (i != 0)
 772                                         lnet_net_unlock(i);
 773                         }
 774                         LASSERT(tmpstr + tmpsiz - s > 0);
 775                 }
 776
 777                 lnet_net_unlock(0);
 778         }
 779
 780         len = s - tmpstr;     /* how many bytes was written */
 781
 782         if (len > *lenp) {    /* linux-supplied buffer is too small */
 783                 rc = -EINVAL;
 784         } else if (len > 0) { /* wrote something */
 785                 if (copy_to_user(buffer, tmpstr, len))
 786                         rc = -EFAULT;
 787                 else
 788                         *ppos += 1;
 789         }
 790
 791         LIBCFS_FREE(tmpstr, tmpsiz);
 792
 793         if (rc == 0)
 794                 *lenp = len;
 795
 796         return rc;
 797 }
 798
 799 struct lnet_portal_rotors {
 800         int             pr_value;
 801         const char      *pr_name;
 802         const char      *pr_desc;
 803 };
 804
 805 static struct lnet_portal_rotors        portal_rotors[] = {
 806         {
 807                 .pr_value = LNET_PTL_ROTOR_OFF,
 808                 .pr_name  = "OFF",
 809                 .pr_desc  = "Turn off message rotor for wildcard portals"
 810         },
 811         {
 812                 .pr_value = LNET_PTL_ROTOR_ON,
 813                 .pr_name  = "ON",
 814                 .pr_desc  = "round-robin dispatch all PUT messages for "
 815                             "wildcard portals"
 816         },
 817         {
 818                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 819                 .pr_name  = "RR_RT",
 820                 .pr_desc  = "round-robin dispatch routed PUT message for "
 821                             "wildcard portals"
 822         },
 823         {
 824                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 825                 .pr_name  = "HASH_RT",
 826                 .pr_desc  = "dispatch routed PUT message by hashing source "
 827                             "NID for wildcard portals"
 828         },
 829         {
 830                 .pr_value = -1,
 831                 .pr_name  = NULL,
 832                 .pr_desc  = NULL
 833         },
 834 };
 835
 836 static int __proc_lnet_portal_rotor(void *data, int write,
 837                                     loff_t pos, void __user *buffer, int nob)
 838 {
 839         const int       buf_len = 128;
 840         char            *buf;
 841         char            *tmp;
 842         int             rc;
 843         int             i;
 844
 845         LIBCFS_ALLOC(buf, buf_len);
 846         if (buf == NULL)
 847                 return -ENOMEM;
 848
 849         if (!write) {
 850                 lnet_res_lock(0);
 851
 852                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 853                         if (portal_rotors[i].pr_value == portal_rotor)
 854                                 break;
 855                 }
 856
 857                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 858                 lnet_res_unlock(0);
 859
 860                 rc = snprintf(buf, buf_len,
 861                               "{\n\tportals: all\n"
 862                               "\trotor: %s\n\tdescription: %s\n}",
 863                               portal_rotors[i].pr_name,
 864                               portal_rotors[i].pr_desc);
 865
 866                 if (pos >= min_t(int, rc, buf_len)) {
 867                         rc = 0;
 868                 } else {
 869                         rc = cfs_trace_copyout_string(buffer, nob,
 870                                         buf + pos, "\n");
 871                 }
 872                 goto out;
 873         }
 874
 875         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 876         if (rc < 0)
 877                 goto out;
 878
 879         tmp = cfs_trimwhite(buf);
 880
 881         rc = -EINVAL;
 882         lnet_res_lock(0);
 883         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 884                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 885                                 strlen(portal_rotors[i].pr_name)) == 0) {
 886                         portal_rotor = portal_rotors[i].pr_value;
 887                         rc = 0;
 888                         break;
 889                 }
 890         }
 891         lnet_res_unlock(0);
 892 out:
 893         LIBCFS_FREE(buf, buf_len);
 894         return rc;
 895 }
 896
 897 static int
 898 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 899                        size_t *lenp, loff_t *ppos)
 900 {
 901         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 902                                     __proc_lnet_portal_rotor);
 903 }
 904
 905
 906 static struct ctl_table lnet_table[] = {
 907         /*
 908          * NB No .strategy entries have been provided since sysctl(8) prefers
 909          * to go via /proc for portability.
 910          */
 911         {
 912                 INIT_CTL_NAME
 913                 .procname       = "stats",
 914                 .mode           = 0644,
 915                 .proc_handler   = &proc_lnet_stats,
 916         },
 917         {
 918                 INIT_CTL_NAME
 919                 .procname       = "routes",
 920                 .mode           = 0444,
 921                 .proc_handler   = &proc_lnet_routes,
 922         },
 923         {
 924                 INIT_CTL_NAME
 925                 .procname       = "routers",
 926                 .mode           = 0444,
 927                 .proc_handler   = &proc_lnet_routers,
 928         },
 929         {
 930                 INIT_CTL_NAME
 931                 .procname       = "peers",
 932                 .mode           = 0644,
 933                 .proc_handler   = &proc_lnet_peers,
 934         },
 935         {
 936                 INIT_CTL_NAME
 937                 .procname       = "buffers",
 938                 .mode           = 0444,
 939                 .proc_handler   = &proc_lnet_buffers,
 940         },
 941         {
 942                 INIT_CTL_NAME
 943                 .procname       = "nis",
 944                 .mode           = 0644,
 945                 .proc_handler   = &proc_lnet_nis,
 946         },
 947         {
 948                 INIT_CTL_NAME
 949                 .procname       = "portal_rotor",
 950                 .mode           = 0644,
 951                 .proc_handler   = &proc_lnet_portal_rotor,
 952         },
 953         { .procname = NULL }
 954 };
 955
 956 void lnet_router_debugfs_init(void)
 957 {
 958         lnet_insert_debugfs(lnet_table, NULL);
 959 }