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/linux/linux-misc.h>
  28 #include <libcfs/libcfs.h>
  29 #include <lnet/lib-lnet.h>
  30
  31 /* This is really lnet_proc.c. You might need to update sanity test 215
  32  * if any file format is changed. */
  33
  34 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  35 /*
  36  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  37  */
  38 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  39 /* change version, 16 bits or 8 bits */
  40 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  41
  42 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  43 /*
  44  * bits for peer hash offset
  45  * NB: we don't use the highest bit of *ppos because it's signed
  46  */
  47 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  48                                  LNET_PROC_CPT_BITS -    \
  49                                  LNET_PROC_VER_BITS -    \
  50                                  LNET_PROC_HASH_BITS - 1)
  51 /* bits for hash index + position */
  52 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  53 /* bits for peer hash table + hash version */
  54 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  55
  56 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  57 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  58 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  59 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  60
  61 #define LNET_PROC_CPT_GET(pos)                          \
  62         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  63
  64 #define LNET_PROC_VER_GET(pos)                          \
  65         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  66
  67 #define LNET_PROC_HASH_GET(pos)                         \
  68         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  69
  70 #define LNET_PROC_HOFF_GET(pos)                         \
  71         (int)((pos) & LNET_PROC_HOFF_MASK)
  72
  73 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  74         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  75         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  76         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  77         ((off) & LNET_PROC_HOFF_MASK))
  78
  79 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  80
  81 static int __proc_lnet_stats(void *data, int write,
  82                              loff_t pos, void __user *buffer, int nob)
  83 {
  84         int              rc;
  85         struct lnet_counters *ctrs;
  86         int              len;
  87         char            *tmpstr;
  88         const int        tmpsiz = 256; /* 7 %u and 4 __u64 */
  89
  90         if (write) {
  91                 lnet_counters_reset();
  92                 return 0;
  93         }
  94
  95         /* read */
  96
  97         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  98         if (ctrs == NULL)
  99                 return -ENOMEM;
 100
 101         LIBCFS_ALLOC(tmpstr, tmpsiz);
 102         if (tmpstr == NULL) {
 103                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 104                 return -ENOMEM;
 105         }
 106
 107         lnet_counters_get(ctrs);
 108
 109         len = snprintf(tmpstr, tmpsiz,
 110                        "%u %u %u %u %u %u %u %llu %llu "
 111                        "%llu %llu",
 112                        ctrs->msgs_alloc, ctrs->msgs_max,
 113                        ctrs->errors,
 114                        ctrs->send_count, ctrs->recv_count,
 115                        ctrs->route_count, ctrs->drop_count,
 116                        ctrs->send_length, ctrs->recv_length,
 117                        ctrs->route_length, ctrs->drop_length);
 118
 119         if (pos >= min_t(int, len, strlen(tmpstr)))
 120                 rc = 0;
 121         else
 122                 rc = cfs_trace_copyout_string(buffer, nob,
 123                                               tmpstr + pos, "\n");
 124
 125         LIBCFS_FREE(tmpstr, tmpsiz);
 126         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 127         return rc;
 128 }
 129
 130 static int
 131 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 132                 size_t *lenp, loff_t *ppos)
 133 {
 134         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 135                                     __proc_lnet_stats);
 136 }
 137
 138 static int
 139 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 140                  size_t *lenp, loff_t *ppos)
 141 {
 142         const int       tmpsiz = 256;
 143         char            *tmpstr;
 144         char            *s;
 145         int             rc = 0;
 146         int             len;
 147         int             ver;
 148         int             off;
 149
 150         CLASSERT(sizeof(loff_t) >= 4);
 151
 152         off = LNET_PROC_HOFF_GET(*ppos);
 153         ver = LNET_PROC_VER_GET(*ppos);
 154
 155         LASSERT(!write);
 156
 157         if (*lenp == 0)
 158                 return 0;
 159
 160         LIBCFS_ALLOC(tmpstr, tmpsiz);
 161         if (tmpstr == NULL)
 162                 return -ENOMEM;
 163
 164         s = tmpstr; /* points to current position in tmpstr[] */
 165
 166         if (*ppos == 0) {
 167                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 168                               the_lnet.ln_routing ? "enabled" : "disabled");
 169                 LASSERT(tmpstr + tmpsiz - s > 0);
 170
 171                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 172                               "net", "hops", "priority", "state", "router");
 173                 LASSERT(tmpstr + tmpsiz - s > 0);
 174
 175                 lnet_net_lock(0);
 176                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 177                 lnet_net_unlock(0);
 178                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 179         } else {
 180                 struct list_head        *n;
 181                 struct list_head        *r;
 182                 struct lnet_route               *route = NULL;
 183                 struct lnet_remotenet   *rnet  = NULL;
 184                 int                     skip  = off - 1;
 185                 struct list_head        *rn_list;
 186                 int                     i;
 187
 188                 lnet_net_lock(0);
 189
 190                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 191                         lnet_net_unlock(0);
 192                         LIBCFS_FREE(tmpstr, tmpsiz);
 193                         return -ESTALE;
 194                 }
 195
 196                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 197                      i++) {
 198                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 199
 200                         n = rn_list->next;
 201
 202                         while (n != rn_list && route == NULL) {
 203                                 rnet = list_entry(n, struct lnet_remotenet,
 204                                                   lrn_list);
 205
 206                                 r = rnet->lrn_routes.next;
 207
 208                                 while (r != &rnet->lrn_routes) {
 209                                         struct lnet_route *re =
 210                                                 list_entry(r, struct lnet_route,
 211                                                            lr_list);
 212                                         if (skip == 0) {
 213                                                 route = re;
 214                                                 break;
 215                                         }
 216
 217                                         skip--;
 218                                         r = r->next;
 219                                 }
 220
 221                                 n = n->next;
 222                         }
 223                 }
 224
 225                 if (route != NULL) {
 226                         __u32        net        = rnet->lrn_net;
 227                         __u32 hops              = route->lr_hops;
 228                         unsigned int priority   = route->lr_priority;
 229                         lnet_nid_t   nid        = route->lr_gateway->lpni_nid;
 230                         int          alive      = lnet_is_route_alive(route);
 231
 232                         s += snprintf(s, tmpstr + tmpsiz - s,
 233                                       "%-8s %4d %8u %7s %s\n",
 234                                       libcfs_net2str(net), hops,
 235                                       priority,
 236                                       alive ? "up" : "down",
 237                                       libcfs_nid2str(nid));
 238                         LASSERT(tmpstr + tmpsiz - s > 0);
 239                 }
 240
 241                 lnet_net_unlock(0);
 242         }
 243
 244         len = s - tmpstr;     /* how many bytes was written */
 245
 246         if (len > *lenp) {    /* linux-supplied buffer is too small */
 247                 rc = -EINVAL;
 248         } else if (len > 0) { /* wrote something */
 249                 if (copy_to_user(buffer, tmpstr, len))
 250                         rc = -EFAULT;
 251                 else {
 252                         off += 1;
 253                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 254                 }
 255         }
 256
 257         LIBCFS_FREE(tmpstr, tmpsiz);
 258
 259         if (rc == 0)
 260                 *lenp = len;
 261
 262         return rc;
 263 }
 264
 265 static int
 266 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 267                   size_t *lenp, loff_t *ppos)
 268 {
 269         int        rc = 0;
 270         char      *tmpstr;
 271         char      *s;
 272         const int  tmpsiz = 256;
 273         int        len;
 274         int        ver;
 275         int        off;
 276
 277         off = LNET_PROC_HOFF_GET(*ppos);
 278         ver = LNET_PROC_VER_GET(*ppos);
 279
 280         LASSERT(!write);
 281
 282         if (*lenp == 0)
 283                 return 0;
 284
 285         LIBCFS_ALLOC(tmpstr, tmpsiz);
 286         if (tmpstr == NULL)
 287                 return -ENOMEM;
 288
 289         s = tmpstr; /* points to current position in tmpstr[] */
 290
 291         if (*ppos == 0) {
 292                 s += snprintf(s, tmpstr + tmpsiz - s,
 293                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 294                               "ref", "rtr_ref", "alive_cnt", "state",
 295                               "last_ping", "ping_sent", "deadline",
 296                               "down_ni", "router");
 297                 LASSERT(tmpstr + tmpsiz - s > 0);
 298
 299                 lnet_net_lock(0);
 300                 ver = (unsigned int)the_lnet.ln_routers_version;
 301                 lnet_net_unlock(0);
 302                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 303         } else {
 304                 struct list_head *r;
 305                 struct lnet_peer_ni *peer = NULL;
 306                 int               skip = off - 1;
 307
 308                 lnet_net_lock(0);
 309
 310                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 311                         lnet_net_unlock(0);
 312
 313                         LIBCFS_FREE(tmpstr, tmpsiz);
 314                         return -ESTALE;
 315                 }
 316
 317                 r = the_lnet.ln_routers.next;
 318
 319                 while (r != &the_lnet.ln_routers) {
 320                         struct lnet_peer_ni *lp =
 321                           list_entry(r, struct lnet_peer_ni,
 322                                      lpni_rtr_list);
 323
 324                         if (skip == 0) {
 325                                 peer = lp;
 326                                 break;
 327                         }
 328
 329                         skip--;
 330                         r = r->next;
 331                 }
 332
 333                 if (peer != NULL) {
 334                         lnet_nid_t nid = peer->lpni_nid;
 335                         time64_t now = ktime_get_seconds();
 336                         time64_t deadline = peer->lpni_ping_deadline;
 337                         int nrefs     = atomic_read(&peer->lpni_refcount);
 338                         int nrtrrefs  = peer->lpni_rtr_refcount;
 339                         int alive_cnt = peer->lpni_alive_count;
 340                         int alive     = peer->lpni_alive;
 341                         int pingsent  = !peer->lpni_ping_notsent;
 342                         time64_t last_ping = now - peer->lpni_ping_timestamp;
 343                         int down_ni   = 0;
 344                         struct lnet_route *rtr;
 345
 346                         if ((peer->lpni_ping_feats &
 347                              LNET_PING_FEAT_NI_STATUS) != 0) {
 348                                 list_for_each_entry(rtr, &peer->lpni_routes,
 349                                                     lr_gwlist) {
 350                                         /* downis on any route should be the
 351                                          * number of downis on the gateway */
 352                                         if (rtr->lr_downis != 0) {
 353                                                 down_ni = rtr->lr_downis;
 354                                                 break;
 355                                         }
 356                                 }
 357                         }
 358
 359                         if (deadline == 0)
 360                                 s += snprintf(s, tmpstr + tmpsiz - s,
 361                                               "%-4d %7d %9d %6s %12llu %9d %8s %7d %s\n",
 362                                               nrefs, nrtrrefs, alive_cnt,
 363                                               alive ? "up" : "down", last_ping,
 364                                               pingsent, "NA", down_ni,
 365                                               libcfs_nid2str(nid));
 366                         else
 367                                 s += snprintf(s, tmpstr + tmpsiz - s,
 368                                               "%-4d %7d %9d %6s %12llu %9d %8llu %7d %s\n",
 369                                               nrefs, nrtrrefs, alive_cnt,
 370                                               alive ? "up" : "down", last_ping,
 371                                               pingsent,
 372                                               deadline - now,
 373                                               down_ni, libcfs_nid2str(nid));
 374                         LASSERT(tmpstr + tmpsiz - s > 0);
 375                 }
 376
 377                 lnet_net_unlock(0);
 378         }
 379
 380         len = s - tmpstr;     /* how many bytes was written */
 381
 382         if (len > *lenp) {    /* linux-supplied buffer is too small */
 383                 rc = -EINVAL;
 384         } else if (len > 0) { /* wrote something */
 385                 if (copy_to_user(buffer, tmpstr, len))
 386                         rc = -EFAULT;
 387                 else {
 388                         off += 1;
 389                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 390                 }
 391         }
 392
 393         LIBCFS_FREE(tmpstr, tmpsiz);
 394
 395         if (rc == 0)
 396                 *lenp = len;
 397
 398         return rc;
 399 }
 400
 401 /* TODO: there should be no direct access to ptable. We should add a set
 402  * of APIs that give access to the ptable and its members */
 403 static int
 404 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 405                 size_t *lenp, loff_t *ppos)
 406 {
 407         const int               tmpsiz  = 256;
 408         struct lnet_peer_table  *ptable;
 409         char                    *tmpstr = NULL;
 410         char                    *s;
 411         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 412         int                     ver  = LNET_PROC_VER_GET(*ppos);
 413         int                     hash = LNET_PROC_HASH_GET(*ppos);
 414         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 415         int                     rc = 0;
 416         int                     len;
 417
 418         if (write) {
 419                 int i;
 420                 struct lnet_peer_ni *peer;
 421
 422                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
 423                         lnet_net_lock(i);
 424                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
 425                                 list_for_each_entry(peer,
 426                                                     &ptable->pt_hash[hash],
 427                                                     lpni_hashlist) {
 428                                         peer->lpni_mintxcredits =
 429                                                 peer->lpni_txcredits;
 430                                         peer->lpni_minrtrcredits =
 431                                                 peer->lpni_rtrcredits;
 432                                 }
 433                         }
 434                         lnet_net_unlock(i);
 435                 }
 436                 *ppos += *lenp;
 437                 return 0;
 438         }
 439
 440         if (*lenp == 0)
 441                 return 0;
 442
 443         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 444
 445         if (cpt >= LNET_CPT_NUMBER) {
 446                 *lenp = 0;
 447                 return 0;
 448         }
 449
 450         LIBCFS_ALLOC(tmpstr, tmpsiz);
 451         if (tmpstr == NULL)
 452                 return -ENOMEM;
 453
 454         s = tmpstr; /* points to current position in tmpstr[] */
 455
 456         if (*ppos == 0) {
 457                 s += snprintf(s, tmpstr + tmpsiz - s,
 458                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 459                               "nid", "refs", "state", "last", "max",
 460                               "rtr", "min", "tx", "min", "queue");
 461                 LASSERT(tmpstr + tmpsiz - s > 0);
 462
 463                 hoff++;
 464         } else {
 465                 struct lnet_peer_ni     *peer;
 466                 struct list_head        *p;
 467                 int                     skip;
 468
 469  again:
 470                 p = NULL;
 471                 peer = NULL;
 472                 skip = hoff - 1;
 473
 474                 lnet_net_lock(cpt);
 475                 ptable = the_lnet.ln_peer_tables[cpt];
 476                 if (hoff == 1)
 477                         ver = LNET_PROC_VERSION(ptable->pt_version);
 478
 479                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 480                         lnet_net_unlock(cpt);
 481                         LIBCFS_FREE(tmpstr, tmpsiz);
 482                         return -ESTALE;
 483                 }
 484
 485                 while (hash < LNET_PEER_HASH_SIZE) {
 486                         if (p == NULL)
 487                                 p = ptable->pt_hash[hash].next;
 488
 489                         while (p != &ptable->pt_hash[hash]) {
 490                                 struct lnet_peer_ni *lp =
 491                                   list_entry(p, struct lnet_peer_ni,
 492                                              lpni_hashlist);
 493                                 if (skip == 0) {
 494                                         peer = lp;
 495
 496                                         /* minor optimization: start from idx+1
 497                                          * on next iteration if we've just
 498                                          * drained lpni_hashlist */
 499                                         if (lp->lpni_hashlist.next ==
 500                                             &ptable->pt_hash[hash]) {
 501                                                 hoff = 1;
 502                                                 hash++;
 503                                         } else {
 504                                                 hoff++;
 505                                         }
 506
 507                                         break;
 508                                 }
 509
 510                                 skip--;
 511                                 p = lp->lpni_hashlist.next;
 512                         }
 513
 514                         if (peer != NULL)
 515                                 break;
 516
 517                         p = NULL;
 518                         hoff = 1;
 519                         hash++;
 520                 }
 521
 522                 if (peer != NULL) {
 523                         lnet_nid_t nid = peer->lpni_nid;
 524                         int nrefs = atomic_read(&peer->lpni_refcount);
 525                         time64_t lastalive = -1;
 526                         char *aliveness = "NA";
 527                         int maxcr = (peer->lpni_net) ?
 528                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 529                         int txcr = peer->lpni_txcredits;
 530                         int mintxcr = peer->lpni_mintxcredits;
 531                         int rtrcr = peer->lpni_rtrcredits;
 532                         int minrtrcr = peer->lpni_minrtrcredits;
 533                         int txqnob = peer->lpni_txqnob;
 534
 535                         if (lnet_isrouter(peer) ||
 536                             lnet_peer_aliveness_enabled(peer))
 537                                 aliveness = peer->lpni_alive ? "up" : "down";
 538
 539                         if (lnet_peer_aliveness_enabled(peer)) {
 540                                 time64_t now = ktime_get_seconds();
 541
 542                                 lastalive = now - peer->lpni_last_alive;
 543
 544                                 /* No need to mess up peers contents with
 545                                  * arbitrarily long integers - it suffices to
 546                                  * know that lastalive is more than 10000s old
 547                                  */
 548                                 if (lastalive >= 10000)
 549                                         lastalive = 9999;
 550                         }
 551
 552                         lnet_net_unlock(cpt);
 553
 554                         s += snprintf(s, tmpstr + tmpsiz - s,
 555                                       "%-24s %4d %5s %5lld %5d %5d %5d %5d %5d %d\n",
 556                                       libcfs_nid2str(nid), nrefs, aliveness,
 557                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 558                                       mintxcr, txqnob);
 559                         LASSERT(tmpstr + tmpsiz - s > 0);
 560
 561                 } else { /* peer is NULL */
 562                         lnet_net_unlock(cpt);
 563                 }
 564
 565                 if (hash == LNET_PEER_HASH_SIZE) {
 566                         cpt++;
 567                         hash = 0;
 568                         hoff = 1;
 569                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 570                                 goto again;
 571                 }
 572         }
 573
 574         len = s - tmpstr;     /* how many bytes was written */
 575
 576         if (len > *lenp) {    /* linux-supplied buffer is too small */
 577                 rc = -EINVAL;
 578         } else if (len > 0) { /* wrote something */
 579                 if (copy_to_user(buffer, tmpstr, len))
 580                         rc = -EFAULT;
 581                 else
 582                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 583         }
 584
 585         LIBCFS_FREE(tmpstr, tmpsiz);
 586
 587         if (rc == 0)
 588                 *lenp = len;
 589
 590         return rc;
 591 }
 592
 593 static int __proc_lnet_buffers(void *data, int write,
 594                                loff_t pos, void __user *buffer, int nob)
 595 {
 596         char            *s;
 597         char            *tmpstr;
 598         int             tmpsiz;
 599         int             idx;
 600         int             len;
 601         int             rc;
 602         int             i;
 603
 604         LASSERT(!write);
 605
 606         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 607         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 608         LIBCFS_ALLOC(tmpstr, tmpsiz);
 609         if (tmpstr == NULL)
 610                 return -ENOMEM;
 611
 612         s = tmpstr; /* points to current position in tmpstr[] */
 613
 614         s += snprintf(s, tmpstr + tmpsiz - s,
 615                       "%5s %5s %7s %7s\n",
 616                       "pages", "count", "credits", "min");
 617         LASSERT(tmpstr + tmpsiz - s > 0);
 618
 619         if (the_lnet.ln_rtrpools == NULL)
 620                 goto out; /* I'm not a router */
 621
 622         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 623                 struct lnet_rtrbufpool *rbp;
 624
 625                 lnet_net_lock(LNET_LOCK_EX);
 626                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 627                         s += snprintf(s, tmpstr + tmpsiz - s,
 628                                       "%5d %5d %7d %7d\n",
 629                                       rbp[idx].rbp_npages,
 630                                       rbp[idx].rbp_nbuffers,
 631                                       rbp[idx].rbp_credits,
 632                                       rbp[idx].rbp_mincredits);
 633                         LASSERT(tmpstr + tmpsiz - s > 0);
 634                 }
 635                 lnet_net_unlock(LNET_LOCK_EX);
 636         }
 637
 638  out:
 639         len = s - tmpstr;
 640
 641         if (pos >= min_t(int, len, strlen(tmpstr)))
 642                 rc = 0;
 643         else
 644                 rc = cfs_trace_copyout_string(buffer, nob,
 645                                               tmpstr + pos, NULL);
 646
 647         LIBCFS_FREE(tmpstr, tmpsiz);
 648         return rc;
 649 }
 650
 651 static int
 652 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 653                   size_t *lenp, loff_t *ppos)
 654 {
 655         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 656                                     __proc_lnet_buffers);
 657 }
 658
 659 static int
 660 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 661               size_t *lenp, loff_t *ppos)
 662 {
 663         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 664         int     rc = 0;
 665         char    *tmpstr;
 666         char    *s;
 667         int     len;
 668
 669         if (*lenp == 0)
 670                 return 0;
 671
 672         if (write) {
 673                 /* Just reset the min stat. */
 674                 struct lnet_ni  *ni;
 675                 struct lnet_net *net;
 676
 677                 lnet_net_lock(0);
 678
 679                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
 680                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 681                                 struct lnet_tx_queue *tq;
 682                                 int i;
 683                                 int j;
 684
 685                                 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 686                                         for (j = 0; ni->ni_cpts != NULL &&
 687                                              j < ni->ni_ncpts; j++) {
 688                                                 if (i == ni->ni_cpts[j])
 689                                                         break;
 690                                         }
 691
 692                                         if (j == ni->ni_ncpts)
 693                                                 continue;
 694
 695                                         if (i != 0)
 696                                                 lnet_net_lock(i);
 697                                         tq->tq_credits_min = tq->tq_credits;
 698                                         if (i != 0)
 699                                                 lnet_net_unlock(i);
 700                                 }
 701                         }
 702                 }
 703                 lnet_net_unlock(0);
 704                 *ppos += *lenp;
 705                 return 0;
 706         }
 707
 708         LIBCFS_ALLOC(tmpstr, tmpsiz);
 709         if (tmpstr == NULL)
 710                 return -ENOMEM;
 711
 712         s = tmpstr; /* points to current position in tmpstr[] */
 713
 714         if (*ppos == 0) {
 715                 s += snprintf(s, tmpstr + tmpsiz - s,
 716                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 717                               "nid", "status", "alive", "refs", "peer",
 718                               "rtr", "max", "tx", "min");
 719                 LASSERT (tmpstr + tmpsiz - s > 0);
 720         } else {
 721                 struct lnet_ni *ni   = NULL;
 722                 int skip = *ppos - 1;
 723
 724                 lnet_net_lock(0);
 725
 726                 ni = lnet_get_ni_idx_locked(skip);
 727
 728                 if (ni != NULL) {
 729                         struct lnet_tx_queue *tq;
 730                         char *stat;
 731                         time64_t now = ktime_get_real_seconds();
 732                         time64_t last_alive = -1;
 733                         int i;
 734                         int j;
 735
 736                         if (the_lnet.ln_routing)
 737                                 last_alive = now - ni->ni_last_alive;
 738
 739                         /* @lo forever alive */
 740                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 741                                 last_alive = 0;
 742
 743                         lnet_ni_lock(ni);
 744                         LASSERT(ni->ni_status != NULL);
 745                         stat = (ni->ni_status->ns_status ==
 746                                 LNET_NI_STATUS_UP) ? "up" : "down";
 747                         lnet_ni_unlock(ni);
 748
 749                         /* we actually output credits information for
 750                          * TX queue of each partition */
 751                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 752                                 for (j = 0; ni->ni_cpts != NULL &&
 753                                      j < ni->ni_ncpts; j++) {
 754                                         if (i == ni->ni_cpts[j])
 755                                                 break;
 756                                 }
 757
 758                                 if (j == ni->ni_ncpts)
 759                                         continue;
 760
 761                                 if (i != 0)
 762                                         lnet_net_lock(i);
 763
 764                                 s += snprintf(s, tmpstr + tmpsiz - s,
 765                                       "%-24s %6s %5lld %4d %4d %4d %5d %5d %5d\n",
 766                                       libcfs_nid2str(ni->ni_nid), stat,
 767                                       last_alive, *ni->ni_refs[i],
 768                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 769                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 770                                       tq->tq_credits_max,
 771                                       tq->tq_credits, tq->tq_credits_min);
 772                                 if (i != 0)
 773                                         lnet_net_unlock(i);
 774                         }
 775                         LASSERT(tmpstr + tmpsiz - s > 0);
 776                 }
 777
 778                 lnet_net_unlock(0);
 779         }
 780
 781         len = s - tmpstr;     /* how many bytes was written */
 782
 783         if (len > *lenp) {    /* linux-supplied buffer is too small */
 784                 rc = -EINVAL;
 785         } else if (len > 0) { /* wrote something */
 786                 if (copy_to_user(buffer, tmpstr, len))
 787                         rc = -EFAULT;
 788                 else
 789                         *ppos += 1;
 790         }
 791
 792         LIBCFS_FREE(tmpstr, tmpsiz);
 793
 794         if (rc == 0)
 795                 *lenp = len;
 796
 797         return rc;
 798 }
 799
 800 struct lnet_portal_rotors {
 801         int             pr_value;
 802         const char      *pr_name;
 803         const char      *pr_desc;
 804 };
 805
 806 static struct lnet_portal_rotors        portal_rotors[] = {
 807         {
 808                 .pr_value = LNET_PTL_ROTOR_OFF,
 809                 .pr_name  = "OFF",
 810                 .pr_desc  = "Turn off message rotor for wildcard portals"
 811         },
 812         {
 813                 .pr_value = LNET_PTL_ROTOR_ON,
 814                 .pr_name  = "ON",
 815                 .pr_desc  = "round-robin dispatch all PUT messages for "
 816                             "wildcard portals"
 817         },
 818         {
 819                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 820                 .pr_name  = "RR_RT",
 821                 .pr_desc  = "round-robin dispatch routed PUT message for "
 822                             "wildcard portals"
 823         },
 824         {
 825                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 826                 .pr_name  = "HASH_RT",
 827                 .pr_desc  = "dispatch routed PUT message by hashing source "
 828                             "NID for wildcard portals"
 829         },
 830         {
 831                 .pr_value = -1,
 832                 .pr_name  = NULL,
 833                 .pr_desc  = NULL
 834         },
 835 };
 836
 837 static int __proc_lnet_portal_rotor(void *data, int write,
 838                                     loff_t pos, void __user *buffer, int nob)
 839 {
 840         const int       buf_len = 128;
 841         char            *buf;
 842         char            *tmp;
 843         int             rc;
 844         int             i;
 845
 846         LIBCFS_ALLOC(buf, buf_len);
 847         if (buf == NULL)
 848                 return -ENOMEM;
 849
 850         if (!write) {
 851                 lnet_res_lock(0);
 852
 853                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 854                         if (portal_rotors[i].pr_value == portal_rotor)
 855                                 break;
 856                 }
 857
 858                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 859                 lnet_res_unlock(0);
 860
 861                 rc = snprintf(buf, buf_len,
 862                               "{\n\tportals: all\n"
 863                               "\trotor: %s\n\tdescription: %s\n}",
 864                               portal_rotors[i].pr_name,
 865                               portal_rotors[i].pr_desc);
 866
 867                 if (pos >= min_t(int, rc, buf_len)) {
 868                         rc = 0;
 869                 } else {
 870                         rc = cfs_trace_copyout_string(buffer, nob,
 871                                         buf + pos, "\n");
 872                 }
 873                 goto out;
 874         }
 875
 876         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 877         if (rc < 0)
 878                 goto out;
 879
 880         tmp = cfs_trimwhite(buf);
 881
 882         rc = -EINVAL;
 883         lnet_res_lock(0);
 884         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 885                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 886                                 strlen(portal_rotors[i].pr_name)) == 0) {
 887                         portal_rotor = portal_rotors[i].pr_value;
 888                         rc = 0;
 889                         break;
 890                 }
 891         }
 892         lnet_res_unlock(0);
 893 out:
 894         LIBCFS_FREE(buf, buf_len);
 895         return rc;
 896 }
 897
 898 static int
 899 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 900                        size_t *lenp, loff_t *ppos)
 901 {
 902         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 903                                     __proc_lnet_portal_rotor);
 904 }
 905
 906
 907 static struct ctl_table lnet_table[] = {
 908         /*
 909          * NB No .strategy entries have been provided since sysctl(8) prefers
 910          * to go via /proc for portability.
 911          */
 912         {
 913                 INIT_CTL_NAME
 914                 .procname       = "stats",
 915                 .mode           = 0644,
 916                 .proc_handler   = &proc_lnet_stats,
 917         },
 918         {
 919                 INIT_CTL_NAME
 920                 .procname       = "routes",
 921                 .mode           = 0444,
 922                 .proc_handler   = &proc_lnet_routes,
 923         },
 924         {
 925                 INIT_CTL_NAME
 926                 .procname       = "routers",
 927                 .mode           = 0444,
 928                 .proc_handler   = &proc_lnet_routers,
 929         },
 930         {
 931                 INIT_CTL_NAME
 932                 .procname       = "peers",
 933                 .mode           = 0644,
 934                 .proc_handler   = &proc_lnet_peers,
 935         },
 936         {
 937                 INIT_CTL_NAME
 938                 .procname       = "buffers",
 939                 .mode           = 0444,
 940                 .proc_handler   = &proc_lnet_buffers,
 941         },
 942         {
 943                 INIT_CTL_NAME
 944                 .procname       = "nis",
 945                 .mode           = 0644,
 946                 .proc_handler   = &proc_lnet_nis,
 947         },
 948         {
 949                 INIT_CTL_NAME
 950                 .procname       = "portal_rotor",
 951                 .mode           = 0644,
 952                 .proc_handler   = &proc_lnet_portal_rotor,
 953         },
 954         { .procname = NULL }
 955 };
 956
 957 void lnet_router_debugfs_init(void)
 958 {
 959         lnet_insert_debugfs(lnet_table, NULL);
 960 }