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.whamcloud.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         struct lnet_counters_common common;
  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         common = ctrs->lct_common;
 109
 110         len = snprintf(tmpstr, tmpsiz,
 111                        "%u %u %u %u %u %u %u %llu %llu "
 112                        "%llu %llu",
 113                        common.lcc_msgs_alloc, common.lcc_msgs_max,
 114                        common.lcc_errors,
 115                        common.lcc_send_count, common.lcc_recv_count,
 116                        common.lcc_route_count, common.lcc_drop_count,
 117                        common.lcc_send_length, common.lcc_recv_length,
 118                        common.lcc_route_length, common.lcc_drop_length);
 119
 120         if (pos >= min_t(int, len, strlen(tmpstr)))
 121                 rc = 0;
 122         else
 123                 rc = cfs_trace_copyout_string(buffer, nob,
 124                                               tmpstr + pos, "\n");
 125
 126         LIBCFS_FREE(tmpstr, tmpsiz);
 127         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 128         return rc;
 129 }
 130
 131 static int
 132 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 133                 size_t *lenp, loff_t *ppos)
 134 {
 135         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 136                                     __proc_lnet_stats);
 137 }
 138
 139 static int
 140 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 141                  size_t *lenp, loff_t *ppos)
 142 {
 143         const int       tmpsiz = 256;
 144         char            *tmpstr;
 145         char            *s;
 146         int             rc = 0;
 147         int             len;
 148         int             ver;
 149         int             off;
 150
 151         CLASSERT(sizeof(loff_t) >= 4);
 152
 153         off = LNET_PROC_HOFF_GET(*ppos);
 154         ver = LNET_PROC_VER_GET(*ppos);
 155
 156         LASSERT(!write);
 157
 158         if (*lenp == 0)
 159                 return 0;
 160
 161         LIBCFS_ALLOC(tmpstr, tmpsiz);
 162         if (tmpstr == NULL)
 163                 return -ENOMEM;
 164
 165         s = tmpstr; /* points to current position in tmpstr[] */
 166
 167         if (*ppos == 0) {
 168                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 169                               the_lnet.ln_routing ? "enabled" : "disabled");
 170                 LASSERT(tmpstr + tmpsiz - s > 0);
 171
 172                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 173                               "net", "hops", "priority", "state", "router");
 174                 LASSERT(tmpstr + tmpsiz - s > 0);
 175
 176                 lnet_net_lock(0);
 177                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 178                 lnet_net_unlock(0);
 179                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 180         } else {
 181                 struct list_head        *n;
 182                 struct list_head        *r;
 183                 struct lnet_route               *route = NULL;
 184                 struct lnet_remotenet   *rnet  = NULL;
 185                 int                     skip  = off - 1;
 186                 struct list_head        *rn_list;
 187                 int                     i;
 188
 189                 lnet_net_lock(0);
 190
 191                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 192                         lnet_net_unlock(0);
 193                         LIBCFS_FREE(tmpstr, tmpsiz);
 194                         return -ESTALE;
 195                 }
 196
 197                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 198                      i++) {
 199                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 200
 201                         n = rn_list->next;
 202
 203                         while (n != rn_list && route == NULL) {
 204                                 rnet = list_entry(n, struct lnet_remotenet,
 205                                                   lrn_list);
 206
 207                                 r = rnet->lrn_routes.next;
 208
 209                                 while (r != &rnet->lrn_routes) {
 210                                         struct lnet_route *re =
 211                                                 list_entry(r, struct lnet_route,
 212                                                            lr_list);
 213                                         if (skip == 0) {
 214                                                 route = re;
 215                                                 break;
 216                                         }
 217
 218                                         skip--;
 219                                         r = r->next;
 220                                 }
 221
 222                                 n = n->next;
 223                         }
 224                 }
 225
 226                 if (route != NULL) {
 227                         __u32        net        = rnet->lrn_net;
 228                         __u32 hops              = route->lr_hops;
 229                         unsigned int priority   = route->lr_priority;
 230                         lnet_nid_t   nid        = route->lr_gateway->lpni_nid;
 231                         int          alive      = lnet_is_route_alive(route);
 232
 233                         s += snprintf(s, tmpstr + tmpsiz - s,
 234                                       "%-8s %4d %8u %7s %s\n",
 235                                       libcfs_net2str(net), hops,
 236                                       priority,
 237                                       alive ? "up" : "down",
 238                                       libcfs_nid2str(nid));
 239                         LASSERT(tmpstr + tmpsiz - s > 0);
 240                 }
 241
 242                 lnet_net_unlock(0);
 243         }
 244
 245         len = s - tmpstr;     /* how many bytes was written */
 246
 247         if (len > *lenp) {    /* linux-supplied buffer is too small */
 248                 rc = -EINVAL;
 249         } else if (len > 0) { /* wrote something */
 250                 if (copy_to_user(buffer, tmpstr, len))
 251                         rc = -EFAULT;
 252                 else {
 253                         off += 1;
 254                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 255                 }
 256         }
 257
 258         LIBCFS_FREE(tmpstr, tmpsiz);
 259
 260         if (rc == 0)
 261                 *lenp = len;
 262
 263         return rc;
 264 }
 265
 266 static int
 267 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 268                   size_t *lenp, loff_t *ppos)
 269 {
 270         int        rc = 0;
 271         char      *tmpstr;
 272         char      *s;
 273         const int  tmpsiz = 256;
 274         int        len;
 275         int        ver;
 276         int        off;
 277
 278         off = LNET_PROC_HOFF_GET(*ppos);
 279         ver = LNET_PROC_VER_GET(*ppos);
 280
 281         LASSERT(!write);
 282
 283         if (*lenp == 0)
 284                 return 0;
 285
 286         LIBCFS_ALLOC(tmpstr, tmpsiz);
 287         if (tmpstr == NULL)
 288                 return -ENOMEM;
 289
 290         s = tmpstr; /* points to current position in tmpstr[] */
 291
 292         if (*ppos == 0) {
 293                 s += snprintf(s, tmpstr + tmpsiz - s,
 294                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 295                               "ref", "rtr_ref", "alive_cnt", "state",
 296                               "last_ping", "ping_sent", "deadline",
 297                               "down_ni", "router");
 298                 LASSERT(tmpstr + tmpsiz - s > 0);
 299
 300                 lnet_net_lock(0);
 301                 ver = (unsigned int)the_lnet.ln_routers_version;
 302                 lnet_net_unlock(0);
 303                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 304         } else {
 305                 struct list_head *r;
 306                 struct lnet_peer_ni *peer = NULL;
 307                 int               skip = off - 1;
 308
 309                 lnet_net_lock(0);
 310
 311                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 312                         lnet_net_unlock(0);
 313
 314                         LIBCFS_FREE(tmpstr, tmpsiz);
 315                         return -ESTALE;
 316                 }
 317
 318                 r = the_lnet.ln_routers.next;
 319
 320                 while (r != &the_lnet.ln_routers) {
 321                         struct lnet_peer_ni *lp =
 322                           list_entry(r, struct lnet_peer_ni,
 323                                      lpni_rtr_list);
 324
 325                         if (skip == 0) {
 326                                 peer = lp;
 327                                 break;
 328                         }
 329
 330                         skip--;
 331                         r = r->next;
 332                 }
 333
 334                 if (peer != NULL) {
 335                         lnet_nid_t nid = peer->lpni_nid;
 336                         time64_t now = ktime_get_seconds();
 337                         time64_t deadline = peer->lpni_ping_deadline;
 338                         int nrefs     = atomic_read(&peer->lpni_refcount);
 339                         int nrtrrefs  = peer->lpni_rtr_refcount;
 340                         int alive_cnt = peer->lpni_alive_count;
 341                         int alive     = peer->lpni_alive;
 342                         int pingsent  = !peer->lpni_ping_notsent;
 343                         time64_t last_ping = now - peer->lpni_ping_timestamp;
 344                         int down_ni   = 0;
 345                         struct lnet_route *rtr;
 346
 347                         if ((peer->lpni_ping_feats &
 348                              LNET_PING_FEAT_NI_STATUS) != 0) {
 349                                 list_for_each_entry(rtr, &peer->lpni_routes,
 350                                                     lr_gwlist) {
 351                                         /* downis on any route should be the
 352                                          * number of downis on the gateway */
 353                                         if (rtr->lr_downis != 0) {
 354                                                 down_ni = rtr->lr_downis;
 355                                                 break;
 356                                         }
 357                                 }
 358                         }
 359
 360                         if (deadline == 0)
 361                                 s += snprintf(s, tmpstr + tmpsiz - s,
 362                                               "%-4d %7d %9d %6s %12llu %9d %8s %7d %s\n",
 363                                               nrefs, nrtrrefs, alive_cnt,
 364                                               alive ? "up" : "down", last_ping,
 365                                               pingsent, "NA", down_ni,
 366                                               libcfs_nid2str(nid));
 367                         else
 368                                 s += snprintf(s, tmpstr + tmpsiz - s,
 369                                               "%-4d %7d %9d %6s %12llu %9d %8llu %7d %s\n",
 370                                               nrefs, nrtrrefs, alive_cnt,
 371                                               alive ? "up" : "down", last_ping,
 372                                               pingsent,
 373                                               deadline - now,
 374                                               down_ni, libcfs_nid2str(nid));
 375                         LASSERT(tmpstr + tmpsiz - s > 0);
 376                 }
 377
 378                 lnet_net_unlock(0);
 379         }
 380
 381         len = s - tmpstr;     /* how many bytes was written */
 382
 383         if (len > *lenp) {    /* linux-supplied buffer is too small */
 384                 rc = -EINVAL;
 385         } else if (len > 0) { /* wrote something */
 386                 if (copy_to_user(buffer, tmpstr, len))
 387                         rc = -EFAULT;
 388                 else {
 389                         off += 1;
 390                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 391                 }
 392         }
 393
 394         LIBCFS_FREE(tmpstr, tmpsiz);
 395
 396         if (rc == 0)
 397                 *lenp = len;
 398
 399         return rc;
 400 }
 401
 402 /* TODO: there should be no direct access to ptable. We should add a set
 403  * of APIs that give access to the ptable and its members */
 404 static int
 405 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 406                 size_t *lenp, loff_t *ppos)
 407 {
 408         const int               tmpsiz  = 256;
 409         struct lnet_peer_table  *ptable;
 410         char                    *tmpstr = NULL;
 411         char                    *s;
 412         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 413         int                     ver  = LNET_PROC_VER_GET(*ppos);
 414         int                     hash = LNET_PROC_HASH_GET(*ppos);
 415         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 416         int                     rc = 0;
 417         int                     len;
 418
 419         if (write) {
 420                 int i;
 421                 struct lnet_peer_ni *peer;
 422
 423                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
 424                         lnet_net_lock(i);
 425                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
 426                                 list_for_each_entry(peer,
 427                                                     &ptable->pt_hash[hash],
 428                                                     lpni_hashlist) {
 429                                         peer->lpni_mintxcredits =
 430                                                 peer->lpni_txcredits;
 431                                         peer->lpni_minrtrcredits =
 432                                                 peer->lpni_rtrcredits;
 433                                 }
 434                         }
 435                         lnet_net_unlock(i);
 436                 }
 437                 *ppos += *lenp;
 438                 return 0;
 439         }
 440
 441         if (*lenp == 0)
 442                 return 0;
 443
 444         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 445
 446         if (cpt >= LNET_CPT_NUMBER) {
 447                 *lenp = 0;
 448                 return 0;
 449         }
 450
 451         LIBCFS_ALLOC(tmpstr, tmpsiz);
 452         if (tmpstr == NULL)
 453                 return -ENOMEM;
 454
 455         s = tmpstr; /* points to current position in tmpstr[] */
 456
 457         if (*ppos == 0) {
 458                 s += snprintf(s, tmpstr + tmpsiz - s,
 459                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 460                               "nid", "refs", "state", "last", "max",
 461                               "rtr", "min", "tx", "min", "queue");
 462                 LASSERT(tmpstr + tmpsiz - s > 0);
 463
 464                 hoff++;
 465         } else {
 466                 struct lnet_peer_ni     *peer;
 467                 struct list_head        *p;
 468                 int                     skip;
 469
 470  again:
 471                 p = NULL;
 472                 peer = NULL;
 473                 skip = hoff - 1;
 474
 475                 lnet_net_lock(cpt);
 476                 ptable = the_lnet.ln_peer_tables[cpt];
 477                 if (hoff == 1)
 478                         ver = LNET_PROC_VERSION(ptable->pt_version);
 479
 480                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 481                         lnet_net_unlock(cpt);
 482                         LIBCFS_FREE(tmpstr, tmpsiz);
 483                         return -ESTALE;
 484                 }
 485
 486                 while (hash < LNET_PEER_HASH_SIZE) {
 487                         if (p == NULL)
 488                                 p = ptable->pt_hash[hash].next;
 489
 490                         while (p != &ptable->pt_hash[hash]) {
 491                                 struct lnet_peer_ni *lp =
 492                                   list_entry(p, struct lnet_peer_ni,
 493                                              lpni_hashlist);
 494                                 if (skip == 0) {
 495                                         peer = lp;
 496
 497                                         /* minor optimization: start from idx+1
 498                                          * on next iteration if we've just
 499                                          * drained lpni_hashlist */
 500                                         if (lp->lpni_hashlist.next ==
 501                                             &ptable->pt_hash[hash]) {
 502                                                 hoff = 1;
 503                                                 hash++;
 504                                         } else {
 505                                                 hoff++;
 506                                         }
 507
 508                                         break;
 509                                 }
 510
 511                                 skip--;
 512                                 p = lp->lpni_hashlist.next;
 513                         }
 514
 515                         if (peer != NULL)
 516                                 break;
 517
 518                         p = NULL;
 519                         hoff = 1;
 520                         hash++;
 521                 }
 522
 523                 if (peer != NULL) {
 524                         lnet_nid_t nid = peer->lpni_nid;
 525                         int nrefs = atomic_read(&peer->lpni_refcount);
 526                         time64_t lastalive = -1;
 527                         char *aliveness = "NA";
 528                         int maxcr = (peer->lpni_net) ?
 529                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 530                         int txcr = peer->lpni_txcredits;
 531                         int mintxcr = peer->lpni_mintxcredits;
 532                         int rtrcr = peer->lpni_rtrcredits;
 533                         int minrtrcr = peer->lpni_minrtrcredits;
 534                         int txqnob = peer->lpni_txqnob;
 535
 536                         if (lnet_isrouter(peer) ||
 537                             lnet_peer_aliveness_enabled(peer))
 538                                 aliveness = peer->lpni_alive ? "up" : "down";
 539
 540                         if (lnet_peer_aliveness_enabled(peer)) {
 541                                 time64_t now = ktime_get_seconds();
 542
 543                                 lastalive = now - peer->lpni_last_alive;
 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 %5lld %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                         time64_t 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 %5lld %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         { .procname = NULL }
 956 };
 957
 958 void lnet_router_debugfs_init(void)
 959 {
 960         lnet_insert_debugfs(lnet_table, NULL);
 961 }