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         struct lnet_counters *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                 struct lnet_route               *route = NULL;
 181                 struct lnet_remotenet   *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, struct lnet_remotenet,
 202                                                   lrn_list);
 203
 204                                 r = rnet->lrn_routes.next;
 205
 206                                 while (r != &rnet->lrn_routes) {
 207                                         struct lnet_route *re =
 208                                                 list_entry(r, struct lnet_route,
 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 %4d %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                         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 %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 = 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                         int 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                                 cfs_time_t now = cfs_time_current();
 540                                 cfs_duration_t delta;
 541
 542                                 delta = cfs_time_sub(now, peer->lpni_last_alive);
 543                                 lastalive = cfs_duration_sec(delta);
 544
 545                                 /* No need to mess up peers contents with
 546                                  * arbitrarily long integers - it suffices to
 547                                  * know that lastalive is more than 10000s old
 548                                  */
 549                                 if (lastalive >= 10000)
 550                                         lastalive = 9999;
 551                         }
 552
 553                         lnet_net_unlock(cpt);
 554
 555                         s += snprintf(s, tmpstr + tmpsiz - s,
 556                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 557                                       libcfs_nid2str(nid), nrefs, aliveness,
 558                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 559                                       mintxcr, txqnob);
 560                         LASSERT(tmpstr + tmpsiz - s > 0);
 561
 562                 } else { /* peer is NULL */
 563                         lnet_net_unlock(cpt);
 564                 }
 565
 566                 if (hash == LNET_PEER_HASH_SIZE) {
 567                         cpt++;
 568                         hash = 0;
 569                         hoff = 1;
 570                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 571                                 goto again;
 572                 }
 573         }
 574
 575         len = s - tmpstr;     /* how many bytes was written */
 576
 577         if (len > *lenp) {    /* linux-supplied buffer is too small */
 578                 rc = -EINVAL;
 579         } else if (len > 0) { /* wrote something */
 580                 if (copy_to_user(buffer, tmpstr, len))
 581                         rc = -EFAULT;
 582                 else
 583                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 584         }
 585
 586         LIBCFS_FREE(tmpstr, tmpsiz);
 587
 588         if (rc == 0)
 589                 *lenp = len;
 590
 591         return rc;
 592 }
 593
 594 static int __proc_lnet_buffers(void *data, int write,
 595                                loff_t pos, void __user *buffer, int nob)
 596 {
 597         char            *s;
 598         char            *tmpstr;
 599         int             tmpsiz;
 600         int             idx;
 601         int             len;
 602         int             rc;
 603         int             i;
 604
 605         LASSERT(!write);
 606
 607         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 608         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 609         LIBCFS_ALLOC(tmpstr, tmpsiz);
 610         if (tmpstr == NULL)
 611                 return -ENOMEM;
 612
 613         s = tmpstr; /* points to current position in tmpstr[] */
 614
 615         s += snprintf(s, tmpstr + tmpsiz - s,
 616                       "%5s %5s %7s %7s\n",
 617                       "pages", "count", "credits", "min");
 618         LASSERT(tmpstr + tmpsiz - s > 0);
 619
 620         if (the_lnet.ln_rtrpools == NULL)
 621                 goto out; /* I'm not a router */
 622
 623         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 624                 struct lnet_rtrbufpool *rbp;
 625
 626                 lnet_net_lock(LNET_LOCK_EX);
 627                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 628                         s += snprintf(s, tmpstr + tmpsiz - s,
 629                                       "%5d %5d %7d %7d\n",
 630                                       rbp[idx].rbp_npages,
 631                                       rbp[idx].rbp_nbuffers,
 632                                       rbp[idx].rbp_credits,
 633                                       rbp[idx].rbp_mincredits);
 634                         LASSERT(tmpstr + tmpsiz - s > 0);
 635                 }
 636                 lnet_net_unlock(LNET_LOCK_EX);
 637         }
 638
 639  out:
 640         len = s - tmpstr;
 641
 642         if (pos >= min_t(int, len, strlen(tmpstr)))
 643                 rc = 0;
 644         else
 645                 rc = cfs_trace_copyout_string(buffer, nob,
 646                                               tmpstr + pos, NULL);
 647
 648         LIBCFS_FREE(tmpstr, tmpsiz);
 649         return rc;
 650 }
 651
 652 static int
 653 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 654                   size_t *lenp, loff_t *ppos)
 655 {
 656         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 657                                     __proc_lnet_buffers);
 658 }
 659
 660 static int
 661 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 662               size_t *lenp, loff_t *ppos)
 663 {
 664         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 665         int     rc = 0;
 666         char    *tmpstr;
 667         char    *s;
 668         int     len;
 669
 670         if (*lenp == 0)
 671                 return 0;
 672
 673         if (write) {
 674                 /* Just reset the min stat. */
 675                 struct lnet_ni  *ni;
 676                 struct lnet_net *net;
 677
 678                 lnet_net_lock(0);
 679
 680                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
 681                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 682                                 struct lnet_tx_queue *tq;
 683                                 int i;
 684                                 int j;
 685
 686                                 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 687                                         for (j = 0; ni->ni_cpts != NULL &&
 688                                              j < ni->ni_ncpts; j++) {
 689                                                 if (i == ni->ni_cpts[j])
 690                                                         break;
 691                                         }
 692
 693                                         if (j == ni->ni_ncpts)
 694                                                 continue;
 695
 696                                         if (i != 0)
 697                                                 lnet_net_lock(i);
 698                                         tq->tq_credits_min = tq->tq_credits;
 699                                         if (i != 0)
 700                                                 lnet_net_unlock(i);
 701                                 }
 702                         }
 703                 }
 704                 lnet_net_unlock(0);
 705                 *ppos += *lenp;
 706                 return 0;
 707         }
 708
 709         LIBCFS_ALLOC(tmpstr, tmpsiz);
 710         if (tmpstr == NULL)
 711                 return -ENOMEM;
 712
 713         s = tmpstr; /* points to current position in tmpstr[] */
 714
 715         if (*ppos == 0) {
 716                 s += snprintf(s, tmpstr + tmpsiz - s,
 717                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 718                               "nid", "status", "alive", "refs", "peer",
 719                               "rtr", "max", "tx", "min");
 720                 LASSERT (tmpstr + tmpsiz - s > 0);
 721         } else {
 722                 struct lnet_ni *ni   = NULL;
 723                 int skip = *ppos - 1;
 724
 725                 lnet_net_lock(0);
 726
 727                 ni = lnet_get_ni_idx_locked(skip);
 728
 729                 if (ni != NULL) {
 730                         struct lnet_tx_queue    *tq;
 731                         char    *stat;
 732                         time64_t now = ktime_get_real_seconds();
 733                         int     last_alive = -1;
 734                         int     i;
 735                         int     j;
 736
 737                         if (the_lnet.ln_routing)
 738                                 last_alive = now - ni->ni_last_alive;
 739
 740                         /* @lo forever alive */
 741                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 742                                 last_alive = 0;
 743
 744                         lnet_ni_lock(ni);
 745                         LASSERT(ni->ni_status != NULL);
 746                         stat = (ni->ni_status->ns_status ==
 747                                 LNET_NI_STATUS_UP) ? "up" : "down";
 748                         lnet_ni_unlock(ni);
 749
 750                         /* we actually output credits information for
 751                          * TX queue of each partition */
 752                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 753                                 for (j = 0; ni->ni_cpts != NULL &&
 754                                      j < ni->ni_ncpts; j++) {
 755                                         if (i == ni->ni_cpts[j])
 756                                                 break;
 757                                 }
 758
 759                                 if (j == ni->ni_ncpts)
 760                                         continue;
 761
 762                                 if (i != 0)
 763                                         lnet_net_lock(i);
 764
 765                                 s += snprintf(s, tmpstr + tmpsiz - s,
 766                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 767                                       libcfs_nid2str(ni->ni_nid), stat,
 768                                       last_alive, *ni->ni_refs[i],
 769                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 770                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 771                                       tq->tq_credits_max,
 772                                       tq->tq_credits, tq->tq_credits_min);
 773                                 if (i != 0)
 774                                         lnet_net_unlock(i);
 775                         }
 776                         LASSERT(tmpstr + tmpsiz - s > 0);
 777                 }
 778
 779                 lnet_net_unlock(0);
 780         }
 781
 782         len = s - tmpstr;     /* how many bytes was written */
 783
 784         if (len > *lenp) {    /* linux-supplied buffer is too small */
 785                 rc = -EINVAL;
 786         } else if (len > 0) { /* wrote something */
 787                 if (copy_to_user(buffer, tmpstr, len))
 788                         rc = -EFAULT;
 789                 else
 790                         *ppos += 1;
 791         }
 792
 793         LIBCFS_FREE(tmpstr, tmpsiz);
 794
 795         if (rc == 0)
 796                 *lenp = len;
 797
 798         return rc;
 799 }
 800
 801 struct lnet_portal_rotors {
 802         int             pr_value;
 803         const char      *pr_name;
 804         const char      *pr_desc;
 805 };
 806
 807 static struct lnet_portal_rotors        portal_rotors[] = {
 808         {
 809                 .pr_value = LNET_PTL_ROTOR_OFF,
 810                 .pr_name  = "OFF",
 811                 .pr_desc  = "Turn off message rotor for wildcard portals"
 812         },
 813         {
 814                 .pr_value = LNET_PTL_ROTOR_ON,
 815                 .pr_name  = "ON",
 816                 .pr_desc  = "round-robin dispatch all PUT messages for "
 817                             "wildcard portals"
 818         },
 819         {
 820                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 821                 .pr_name  = "RR_RT",
 822                 .pr_desc  = "round-robin dispatch routed PUT message for "
 823                             "wildcard portals"
 824         },
 825         {
 826                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 827                 .pr_name  = "HASH_RT",
 828                 .pr_desc  = "dispatch routed PUT message by hashing source "
 829                             "NID for wildcard portals"
 830         },
 831         {
 832                 .pr_value = -1,
 833                 .pr_name  = NULL,
 834                 .pr_desc  = NULL
 835         },
 836 };
 837
 838 static int __proc_lnet_portal_rotor(void *data, int write,
 839                                     loff_t pos, void __user *buffer, int nob)
 840 {
 841         const int       buf_len = 128;
 842         char            *buf;
 843         char            *tmp;
 844         int             rc;
 845         int             i;
 846
 847         LIBCFS_ALLOC(buf, buf_len);
 848         if (buf == NULL)
 849                 return -ENOMEM;
 850
 851         if (!write) {
 852                 lnet_res_lock(0);
 853
 854                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 855                         if (portal_rotors[i].pr_value == portal_rotor)
 856                                 break;
 857                 }
 858
 859                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 860                 lnet_res_unlock(0);
 861
 862                 rc = snprintf(buf, buf_len,
 863                               "{\n\tportals: all\n"
 864                               "\trotor: %s\n\tdescription: %s\n}",
 865                               portal_rotors[i].pr_name,
 866                               portal_rotors[i].pr_desc);
 867
 868                 if (pos >= min_t(int, rc, buf_len)) {
 869                         rc = 0;
 870                 } else {
 871                         rc = cfs_trace_copyout_string(buffer, nob,
 872                                         buf + pos, "\n");
 873                 }
 874                 goto out;
 875         }
 876
 877         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 878         if (rc < 0)
 879                 goto out;
 880
 881         tmp = cfs_trimwhite(buf);
 882
 883         rc = -EINVAL;
 884         lnet_res_lock(0);
 885         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 886                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 887                                 strlen(portal_rotors[i].pr_name)) == 0) {
 888                         portal_rotor = portal_rotors[i].pr_value;
 889                         rc = 0;
 890                         break;
 891                 }
 892         }
 893         lnet_res_unlock(0);
 894 out:
 895         LIBCFS_FREE(buf, buf_len);
 896         return rc;
 897 }
 898
 899 static int
 900 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 901                        size_t *lenp, loff_t *ppos)
 902 {
 903         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 904                                     __proc_lnet_portal_rotor);
 905 }
 906
 907
 908 static struct ctl_table lnet_table[] = {
 909         /*
 910          * NB No .strategy entries have been provided since sysctl(8) prefers
 911          * to go via /proc for portability.
 912          */
 913         {
 914                 INIT_CTL_NAME
 915                 .procname       = "stats",
 916                 .mode           = 0644,
 917                 .proc_handler   = &proc_lnet_stats,
 918         },
 919         {
 920                 INIT_CTL_NAME
 921                 .procname       = "routes",
 922                 .mode           = 0444,
 923                 .proc_handler   = &proc_lnet_routes,
 924         },
 925         {
 926                 INIT_CTL_NAME
 927                 .procname       = "routers",
 928                 .mode           = 0444,
 929                 .proc_handler   = &proc_lnet_routers,
 930         },
 931         {
 932                 INIT_CTL_NAME
 933                 .procname       = "peers",
 934                 .mode           = 0644,
 935                 .proc_handler   = &proc_lnet_peers,
 936         },
 937         {
 938                 INIT_CTL_NAME
 939                 .procname       = "buffers",
 940                 .mode           = 0444,
 941                 .proc_handler   = &proc_lnet_buffers,
 942         },
 943         {
 944                 INIT_CTL_NAME
 945                 .procname       = "nis",
 946                 .mode           = 0644,
 947                 .proc_handler   = &proc_lnet_nis,
 948         },
 949         {
 950                 INIT_CTL_NAME
 951                 .procname       = "portal_rotor",
 952                 .mode           = 0644,
 953                 .proc_handler   = &proc_lnet_portal_rotor,
 954         },
 955         { 0 }
 956 };
 957
 958 static struct ctl_table top_table[] = {
 959         {
 960                 INIT_CTL_NAME
 961                 .procname       = "lnet",
 962                 .mode           = 0555,
 963                 .data           = NULL,
 964                 .maxlen         = 0,
 965                 .child          = lnet_table,
 966         },
 967         { 0 }
 968 };
 969
 970 void
 971 lnet_proc_init(void)
 972 {
 973 #ifdef CONFIG_SYSCTL
 974         if (lnet_table_header == NULL)
 975                 lnet_table_header = register_sysctl_table(top_table);
 976 #endif
 977 }
 978
 979 void
 980 lnet_proc_fini(void)
 981 {
 982 #ifdef CONFIG_SYSCTL
 983         if (lnet_table_header != NULL)
 984                 unregister_sysctl_table(lnet_table_header);
 985
 986         lnet_table_header = NULL;
 987 #endif
 988 }