drivers/staging/lustre/lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2012, Intel Corporation.
   5  *
   6  *   This file is part of Portals
   7  *   http://sourceforge.net/projects/sandiaportals/
   8  *
   9  *   Portals is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Portals is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  */
  19
  20 #define DEBUG_SUBSYSTEM S_LNET
  21
  22 #include <linux/libcfs/libcfs.h>
  23 #include <linux/lnet/lib-lnet.h>
  24
  25 /*
  26  * This is really lnet_proc.c. You might need to update sanity test 215
  27  * if any file format is changed.
  28  */
  29
  30 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  31 /*
  32  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  33  */
  34 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  35 /* change version, 16 bits or 8 bits */
  36 #define LNET_PROC_VER_BITS      max_t(size_t, min_t(size_t, LNET_LOFFT_BITS, 64) / 4, 8)
  37
  38 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  39 /*
  40  * bits for peer hash offset
  41  * NB: we don't use the highest bit of *ppos because it's signed
  42  */
  43 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  44                                  LNET_PROC_CPT_BITS -    \
  45                                  LNET_PROC_VER_BITS -    \
  46                                  LNET_PROC_HASH_BITS - 1)
  47 /* bits for hash index + position */
  48 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  49 /* bits for peer hash table + hash version */
  50 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  51
  52 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  53 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  54 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  55 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  56
  57 #define LNET_PROC_CPT_GET(pos)                          \
  58         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  59
  60 #define LNET_PROC_VER_GET(pos)                          \
  61         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  62
  63 #define LNET_PROC_HASH_GET(pos)                         \
  64         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  65
  66 #define LNET_PROC_HOFF_GET(pos)                         \
  67         (int)((pos) & LNET_PROC_HOFF_MASK)
  68
  69 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  70         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  71         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  72         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  73         ((off) & LNET_PROC_HOFF_MASK))
  74
  75 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  76
  77 static int __proc_lnet_stats(void *data, int write,
  78                              loff_t pos, void __user *buffer, int nob)
  79 {
  80         int rc;
  81         struct lnet_counters *ctrs;
  82         int len;
  83         char *tmpstr;
  84         const int tmpsiz = 256; /* 7 %u and 4 %llu */
  85
  86         if (write) {
  87                 lnet_counters_reset();
  88                 return 0;
  89         }
  90
  91         /* read */
  92
  93         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  94         if (!ctrs)
  95                 return -ENOMEM;
  96
  97         LIBCFS_ALLOC(tmpstr, tmpsiz);
  98         if (!tmpstr) {
  99                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 100                 return -ENOMEM;
 101         }
 102
 103         lnet_counters_get(ctrs);
 104
 105         len = snprintf(tmpstr, tmpsiz,
 106                        "%u %u %u %u %u %u %u %llu %llu %llu %llu",
 107                        ctrs->msgs_alloc, ctrs->msgs_max,
 108                        ctrs->errors,
 109                        ctrs->send_count, ctrs->recv_count,
 110                        ctrs->route_count, ctrs->drop_count,
 111                        ctrs->send_length, ctrs->recv_length,
 112                        ctrs->route_length, ctrs->drop_length);
 113
 114         if (pos >= min_t(int, len, strlen(tmpstr)))
 115                 rc = 0;
 116         else
 117                 rc = cfs_trace_copyout_string(buffer, nob,
 118                                               tmpstr + pos, "\n");
 119
 120         LIBCFS_FREE(tmpstr, tmpsiz);
 121         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 122         return rc;
 123 }
 124
 125 static int proc_lnet_stats(struct ctl_table *table, int write,
 126                            void __user *buffer, size_t *lenp, loff_t *ppos)
 127 {
 128         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 129                                     __proc_lnet_stats);
 130 }
 131
 132 static int proc_lnet_routes(struct ctl_table *table, int write,
 133                             void __user *buffer, size_t *lenp, loff_t *ppos)
 134 {
 135         const int tmpsiz = 256;
 136         char *tmpstr;
 137         char *s;
 138         int rc = 0;
 139         int len;
 140         int ver;
 141         int off;
 142
 143         BUILD_BUG_ON(sizeof(loff_t) < 4);
 144
 145         off = LNET_PROC_HOFF_GET(*ppos);
 146         ver = LNET_PROC_VER_GET(*ppos);
 147
 148         LASSERT(!write);
 149
 150         if (!*lenp)
 151                 return 0;
 152
 153         LIBCFS_ALLOC(tmpstr, tmpsiz);
 154         if (!tmpstr)
 155                 return -ENOMEM;
 156
 157         s = tmpstr; /* points to current position in tmpstr[] */
 158
 159         if (!*ppos) {
 160                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 161                               the_lnet.ln_routing ? "enabled" : "disabled");
 162                 LASSERT(tmpstr + tmpsiz - s > 0);
 163
 164                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 165                               "net", "hops", "priority", "state", "router");
 166                 LASSERT(tmpstr + tmpsiz - s > 0);
 167
 168                 lnet_net_lock(0);
 169                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 170                 lnet_net_unlock(0);
 171                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 172         } else {
 173                 struct list_head *n;
 174                 struct list_head *r;
 175                 struct lnet_route *route = NULL;
 176                 struct lnet_remotenet *rnet  = NULL;
 177                 int skip  = off - 1;
 178                 struct list_head *rn_list;
 179                 int i;
 180
 181                 lnet_net_lock(0);
 182
 183                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 184                         lnet_net_unlock(0);
 185                         LIBCFS_FREE(tmpstr, tmpsiz);
 186                         return -ESTALE;
 187                 }
 188
 189                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && !route; i++) {
 190                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 191
 192                         n = rn_list->next;
 193
 194                         while (n != rn_list && !route) {
 195                                 rnet = list_entry(n, struct lnet_remotenet,
 196                                                   lrn_list);
 197
 198                                 r = rnet->lrn_routes.next;
 199
 200                                 while (r != &rnet->lrn_routes) {
 201                                         struct lnet_route *re;
 202
 203                                         re = list_entry(r, struct lnet_route,
 204                                                         lr_list);
 205                                         if (!skip) {
 206                                                 route = re;
 207                                                 break;
 208                                         }
 209
 210                                         skip--;
 211                                         r = r->next;
 212                                 }
 213
 214                                 n = n->next;
 215                         }
 216                 }
 217
 218                 if (route) {
 219                         __u32 net = rnet->lrn_net;
 220                         __u32 hops = route->lr_hops;
 221                         unsigned int priority = route->lr_priority;
 222                         lnet_nid_t nid = route->lr_gateway->lp_nid;
 223                         int alive = lnet_is_route_alive(route);
 224
 225                         s += snprintf(s, tmpstr + tmpsiz - s,
 226                                       "%-8s %4u %8u %7s %s\n",
 227                                       libcfs_net2str(net), hops,
 228                                       priority,
 229                                       alive ? "up" : "down",
 230                                       libcfs_nid2str(nid));
 231                         LASSERT(tmpstr + tmpsiz - s > 0);
 232                 }
 233
 234                 lnet_net_unlock(0);
 235         }
 236
 237         len = s - tmpstr;     /* how many bytes was written */
 238
 239         if (len > *lenp) {    /* linux-supplied buffer is too small */
 240                 rc = -EINVAL;
 241         } else if (len > 0) { /* wrote something */
 242                 if (copy_to_user(buffer, tmpstr, len)) {
 243                         rc = -EFAULT;
 244                 } else {
 245                         off += 1;
 246                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 247                 }
 248         }
 249
 250         LIBCFS_FREE(tmpstr, tmpsiz);
 251
 252         if (!rc)
 253                 *lenp = len;
 254
 255         return rc;
 256 }
 257
 258 static int proc_lnet_routers(struct ctl_table *table, int write,
 259                              void __user *buffer, size_t *lenp, loff_t *ppos)
 260 {
 261         int rc = 0;
 262         char *tmpstr;
 263         char *s;
 264         const int tmpsiz = 256;
 265         int len;
 266         int ver;
 267         int off;
 268
 269         off = LNET_PROC_HOFF_GET(*ppos);
 270         ver = LNET_PROC_VER_GET(*ppos);
 271
 272         LASSERT(!write);
 273
 274         if (!*lenp)
 275                 return 0;
 276
 277         LIBCFS_ALLOC(tmpstr, tmpsiz);
 278         if (!tmpstr)
 279                 return -ENOMEM;
 280
 281         s = tmpstr; /* points to current position in tmpstr[] */
 282
 283         if (!*ppos) {
 284                 s += snprintf(s, tmpstr + tmpsiz - s,
 285                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 286                               "ref", "rtr_ref", "alive_cnt", "state",
 287                               "last_ping", "ping_sent", "deadline",
 288                               "down_ni", "router");
 289                 LASSERT(tmpstr + tmpsiz - s > 0);
 290
 291                 lnet_net_lock(0);
 292                 ver = (unsigned int)the_lnet.ln_routers_version;
 293                 lnet_net_unlock(0);
 294                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 295         } else {
 296                 struct list_head *r;
 297                 struct lnet_peer *peer = NULL;
 298                 int skip = off - 1;
 299
 300                 lnet_net_lock(0);
 301
 302                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 303                         lnet_net_unlock(0);
 304
 305                         LIBCFS_FREE(tmpstr, tmpsiz);
 306                         return -ESTALE;
 307                 }
 308
 309                 r = the_lnet.ln_routers.next;
 310
 311                 while (r != &the_lnet.ln_routers) {
 312                         struct lnet_peer *lp;
 313
 314                         lp = list_entry(r, struct lnet_peer, lp_rtr_list);
 315                         if (!skip) {
 316                                 peer = lp;
 317                                 break;
 318                         }
 319
 320                         skip--;
 321                         r = r->next;
 322                 }
 323
 324                 if (peer) {
 325                         lnet_nid_t nid = peer->lp_nid;
 326                         unsigned long now = cfs_time_current();
 327                         unsigned long deadline = peer->lp_ping_deadline;
 328                         int nrefs = peer->lp_refcount;
 329                         int nrtrrefs = peer->lp_rtr_refcount;
 330                         int alive_cnt = peer->lp_alive_count;
 331                         int alive = peer->lp_alive;
 332                         int pingsent = !peer->lp_ping_notsent;
 333                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 334                                                      peer->lp_ping_timestamp));
 335                         int down_ni = 0;
 336                         struct lnet_route *rtr;
 337
 338                         if ((peer->lp_ping_feats &
 339                              LNET_PING_FEAT_NI_STATUS)) {
 340                                 list_for_each_entry(rtr, &peer->lp_routes,
 341                                                     lr_gwlist) {
 342                                         /*
 343                                          * downis on any route should be the
 344                                          * number of downis on the gateway
 345                                          */
 346                                         if (rtr->lr_downis) {
 347                                                 down_ni = rtr->lr_downis;
 348                                                 break;
 349                                         }
 350                                 }
 351                         }
 352
 353                         if (!deadline)
 354                                 s += snprintf(s, tmpstr + tmpsiz - s,
 355                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 356                                               nrefs, nrtrrefs, alive_cnt,
 357                                               alive ? "up" : "down", last_ping,
 358                                               pingsent, "NA", down_ni,
 359                                               libcfs_nid2str(nid));
 360                         else
 361                                 s += snprintf(s, tmpstr + tmpsiz - s,
 362                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 363                                               nrefs, nrtrrefs, alive_cnt,
 364                                               alive ? "up" : "down", last_ping,
 365                                               pingsent,
 366                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 367                                               down_ni, libcfs_nid2str(nid));
 368                         LASSERT(tmpstr + tmpsiz - s > 0);
 369                 }
 370
 371                 lnet_net_unlock(0);
 372         }
 373
 374         len = s - tmpstr;     /* how many bytes was written */
 375
 376         if (len > *lenp) {    /* linux-supplied buffer is too small */
 377                 rc = -EINVAL;
 378         } else if (len > 0) { /* wrote something */
 379                 if (copy_to_user(buffer, tmpstr, len)) {
 380                         rc = -EFAULT;
 381                 } else {
 382                         off += 1;
 383                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 384                 }
 385         }
 386
 387         LIBCFS_FREE(tmpstr, tmpsiz);
 388
 389         if (!rc)
 390                 *lenp = len;
 391
 392         return rc;
 393 }
 394
 395 static int proc_lnet_peers(struct ctl_table *table, int write,
 396                            void __user *buffer, size_t *lenp, loff_t *ppos)
 397 {
 398         const int tmpsiz  = 256;
 399         struct lnet_peer_table *ptable;
 400         char *tmpstr;
 401         char *s;
 402         int cpt  = LNET_PROC_CPT_GET(*ppos);
 403         int ver  = LNET_PROC_VER_GET(*ppos);
 404         int hash = LNET_PROC_HASH_GET(*ppos);
 405         int hoff = LNET_PROC_HOFF_GET(*ppos);
 406         int rc = 0;
 407         int len;
 408
 409         BUILD_BUG_ON(LNET_PROC_HASH_BITS < LNET_PEER_HASH_BITS);
 410         LASSERT(!write);
 411
 412         if (!*lenp)
 413                 return 0;
 414
 415         if (cpt >= LNET_CPT_NUMBER) {
 416                 *lenp = 0;
 417                 return 0;
 418         }
 419
 420         LIBCFS_ALLOC(tmpstr, tmpsiz);
 421         if (!tmpstr)
 422                 return -ENOMEM;
 423
 424         s = tmpstr; /* points to current position in tmpstr[] */
 425
 426         if (!*ppos) {
 427                 s += snprintf(s, tmpstr + tmpsiz - s,
 428                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 429                               "nid", "refs", "state", "last", "max",
 430                               "rtr", "min", "tx", "min", "queue");
 431                 LASSERT(tmpstr + tmpsiz - s > 0);
 432
 433                 hoff++;
 434         } else {
 435                 struct lnet_peer *peer;
 436                 struct list_head *p;
 437                 int skip;
 438  again:
 439                 p = NULL;
 440                 peer = NULL;
 441                 skip = hoff - 1;
 442
 443                 lnet_net_lock(cpt);
 444                 ptable = the_lnet.ln_peer_tables[cpt];
 445                 if (hoff == 1)
 446                         ver = LNET_PROC_VERSION(ptable->pt_version);
 447
 448                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 449                         lnet_net_unlock(cpt);
 450                         LIBCFS_FREE(tmpstr, tmpsiz);
 451                         return -ESTALE;
 452                 }
 453
 454                 while (hash < LNET_PEER_HASH_SIZE) {
 455                         if (!p)
 456                                 p = ptable->pt_hash[hash].next;
 457
 458                         while (p != &ptable->pt_hash[hash]) {
 459                                 struct lnet_peer *lp;
 460
 461                                 lp = list_entry(p, struct lnet_peer,
 462                                                 lp_hashlist);
 463                                 if (!skip) {
 464                                         peer = lp;
 465
 466                                         /*
 467                                          * minor optimization: start from idx+1
 468                                          * on next iteration if we've just
 469                                          * drained lp_hashlist
 470                                          */
 471                                         if (lp->lp_hashlist.next ==
 472                                             &ptable->pt_hash[hash]) {
 473                                                 hoff = 1;
 474                                                 hash++;
 475                                         } else {
 476                                                 hoff++;
 477                                         }
 478
 479                                         break;
 480                                 }
 481
 482                                 skip--;
 483                                 p = lp->lp_hashlist.next;
 484                         }
 485
 486                         if (peer)
 487                                 break;
 488
 489                         p = NULL;
 490                         hoff = 1;
 491                         hash++;
 492                 }
 493
 494                 if (peer) {
 495                         lnet_nid_t nid = peer->lp_nid;
 496                         int nrefs = peer->lp_refcount;
 497                         int lastalive = -1;
 498                         char *aliveness = "NA";
 499                         int maxcr = peer->lp_ni->ni_peertxcredits;
 500                         int txcr = peer->lp_txcredits;
 501                         int mintxcr = peer->lp_mintxcredits;
 502                         int rtrcr = peer->lp_rtrcredits;
 503                         int minrtrcr = peer->lp_minrtrcredits;
 504                         int txqnob = peer->lp_txqnob;
 505
 506                         if (lnet_isrouter(peer) ||
 507                             lnet_peer_aliveness_enabled(peer))
 508                                 aliveness = peer->lp_alive ? "up" : "down";
 509
 510                         if (lnet_peer_aliveness_enabled(peer)) {
 511                                 unsigned long now = cfs_time_current();
 512                                 long delta;
 513
 514                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 515                                 lastalive = cfs_duration_sec(delta);
 516
 517                                 /* No need to mess up peers contents with
 518                                  * arbitrarily long integers - it suffices to
 519                                  * know that lastalive is more than 10000s old
 520                                  */
 521                                 if (lastalive >= 10000)
 522                                         lastalive = 9999;
 523                         }
 524
 525                         lnet_net_unlock(cpt);
 526
 527                         s += snprintf(s, tmpstr + tmpsiz - s,
 528                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 529                                       libcfs_nid2str(nid), nrefs, aliveness,
 530                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 531                                       mintxcr, txqnob);
 532                         LASSERT(tmpstr + tmpsiz - s > 0);
 533
 534                 } else { /* peer is NULL */
 535                         lnet_net_unlock(cpt);
 536                 }
 537
 538                 if (hash == LNET_PEER_HASH_SIZE) {
 539                         cpt++;
 540                         hash = 0;
 541                         hoff = 1;
 542                         if (!peer && cpt < LNET_CPT_NUMBER)
 543                                 goto again;
 544                 }
 545         }
 546
 547         len = s - tmpstr;     /* how many bytes was written */
 548
 549         if (len > *lenp) {    /* linux-supplied buffer is too small */
 550                 rc = -EINVAL;
 551         } else if (len > 0) { /* wrote something */
 552                 if (copy_to_user(buffer, tmpstr, len))
 553                         rc = -EFAULT;
 554                 else
 555                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 556         }
 557
 558         LIBCFS_FREE(tmpstr, tmpsiz);
 559
 560         if (!rc)
 561                 *lenp = len;
 562
 563         return rc;
 564 }
 565
 566 static int __proc_lnet_buffers(void *data, int write,
 567                                loff_t pos, void __user *buffer, int nob)
 568 {
 569         char *s;
 570         char *tmpstr;
 571         int tmpsiz;
 572         int idx;
 573         int len;
 574         int rc;
 575         int i;
 576
 577         LASSERT(!write);
 578
 579         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 580         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 581         LIBCFS_ALLOC(tmpstr, tmpsiz);
 582         if (!tmpstr)
 583                 return -ENOMEM;
 584
 585         s = tmpstr; /* points to current position in tmpstr[] */
 586
 587         s += snprintf(s, tmpstr + tmpsiz - s,
 588                       "%5s %5s %7s %7s\n",
 589                       "pages", "count", "credits", "min");
 590         LASSERT(tmpstr + tmpsiz - s > 0);
 591
 592         if (!the_lnet.ln_rtrpools)
 593                 goto out; /* I'm not a router */
 594
 595         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 596                 struct lnet_rtrbufpool *rbp;
 597
 598                 lnet_net_lock(LNET_LOCK_EX);
 599                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 600                         s += snprintf(s, tmpstr + tmpsiz - s,
 601                                       "%5d %5d %7d %7d\n",
 602                                       rbp[idx].rbp_npages,
 603                                       rbp[idx].rbp_nbuffers,
 604                                       rbp[idx].rbp_credits,
 605                                       rbp[idx].rbp_mincredits);
 606                         LASSERT(tmpstr + tmpsiz - s > 0);
 607                 }
 608                 lnet_net_unlock(LNET_LOCK_EX);
 609         }
 610
 611  out:
 612         len = s - tmpstr;
 613
 614         if (pos >= min_t(int, len, strlen(tmpstr)))
 615                 rc = 0;
 616         else
 617                 rc = cfs_trace_copyout_string(buffer, nob,
 618                                               tmpstr + pos, NULL);
 619
 620         LIBCFS_FREE(tmpstr, tmpsiz);
 621         return rc;
 622 }
 623
 624 static int proc_lnet_buffers(struct ctl_table *table, int write,
 625                              void __user *buffer, size_t *lenp, loff_t *ppos)
 626 {
 627         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 628                                     __proc_lnet_buffers);
 629 }
 630
 631 static int proc_lnet_nis(struct ctl_table *table, int write,
 632                          void __user *buffer, size_t *lenp, loff_t *ppos)
 633 {
 634         int tmpsiz = 128 * LNET_CPT_NUMBER;
 635         int rc = 0;
 636         char *tmpstr;
 637         char *s;
 638         int len;
 639
 640         LASSERT(!write);
 641
 642         if (!*lenp)
 643                 return 0;
 644
 645         LIBCFS_ALLOC(tmpstr, tmpsiz);
 646         if (!tmpstr)
 647                 return -ENOMEM;
 648
 649         s = tmpstr; /* points to current position in tmpstr[] */
 650
 651         if (!*ppos) {
 652                 s += snprintf(s, tmpstr + tmpsiz - s,
 653                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 654                               "nid", "status", "alive", "refs", "peer",
 655                               "rtr", "max", "tx", "min");
 656                 LASSERT(tmpstr + tmpsiz - s > 0);
 657         } else {
 658                 struct list_head *n;
 659                 struct lnet_ni *ni = NULL;
 660                 int skip = *ppos - 1;
 661
 662                 lnet_net_lock(0);
 663
 664                 n = the_lnet.ln_nis.next;
 665
 666                 while (n != &the_lnet.ln_nis) {
 667                         struct lnet_ni *a_ni;
 668
 669                         a_ni = list_entry(n, struct lnet_ni, ni_list);
 670                         if (!skip) {
 671                                 ni = a_ni;
 672                                 break;
 673                         }
 674
 675                         skip--;
 676                         n = n->next;
 677                 }
 678
 679                 if (ni) {
 680                         struct lnet_tx_queue *tq;
 681                         char *stat;
 682                         time64_t now = ktime_get_real_seconds();
 683                         int last_alive = -1;
 684                         int i;
 685                         int j;
 686
 687                         if (the_lnet.ln_routing)
 688                                 last_alive = now - ni->ni_last_alive;
 689
 690                         /* @lo forever alive */
 691                         if (ni->ni_lnd->lnd_type == LOLND)
 692                                 last_alive = 0;
 693
 694                         lnet_ni_lock(ni);
 695                         LASSERT(ni->ni_status);
 696                         stat = (ni->ni_status->ns_status ==
 697                                 LNET_NI_STATUS_UP) ? "up" : "down";
 698                         lnet_ni_unlock(ni);
 699
 700                         /*
 701                          * we actually output credits information for
 702                          * TX queue of each partition
 703                          */
 704                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 705                                 for (j = 0; ni->ni_cpts &&
 706                                      j < ni->ni_ncpts; j++) {
 707                                         if (i == ni->ni_cpts[j])
 708                                                 break;
 709                                 }
 710
 711                                 if (j == ni->ni_ncpts)
 712                                         continue;
 713
 714                                 if (i)
 715                                         lnet_net_lock(i);
 716
 717                                 s += snprintf(s, tmpstr + tmpsiz - s,
 718                                               "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 719                                               libcfs_nid2str(ni->ni_nid), stat,
 720                                               last_alive, *ni->ni_refs[i],
 721                                               ni->ni_peertxcredits,
 722                                               ni->ni_peerrtrcredits,
 723                                               tq->tq_credits_max,
 724                                               tq->tq_credits,
 725                                               tq->tq_credits_min);
 726                                 if (i)
 727                                         lnet_net_unlock(i);
 728                         }
 729                         LASSERT(tmpstr + tmpsiz - s > 0);
 730                 }
 731
 732                 lnet_net_unlock(0);
 733         }
 734
 735         len = s - tmpstr;     /* how many bytes was written */
 736
 737         if (len > *lenp) {    /* linux-supplied buffer is too small */
 738                 rc = -EINVAL;
 739         } else if (len > 0) { /* wrote something */
 740                 if (copy_to_user(buffer, tmpstr, len))
 741                         rc = -EFAULT;
 742                 else
 743                         *ppos += 1;
 744         }
 745
 746         LIBCFS_FREE(tmpstr, tmpsiz);
 747
 748         if (!rc)
 749                 *lenp = len;
 750
 751         return rc;
 752 }
 753
 754 struct lnet_portal_rotors {
 755         int pr_value;
 756         const char *pr_name;
 757         const char *pr_desc;
 758 };
 759
 760 static struct lnet_portal_rotors        portal_rotors[] = {
 761         {
 762                 .pr_value = LNET_PTL_ROTOR_OFF,
 763                 .pr_name  = "OFF",
 764                 .pr_desc  = "Turn off message rotor for wildcard portals"
 765         },
 766         {
 767                 .pr_value = LNET_PTL_ROTOR_ON,
 768                 .pr_name  = "ON",
 769                 .pr_desc  = "round-robin dispatch all PUT messages for wildcard portals"
 770         },
 771         {
 772                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 773                 .pr_name  = "RR_RT",
 774                 .pr_desc  = "round-robin dispatch routed PUT message for wildcard portals"
 775         },
 776         {
 777                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 778                 .pr_name  = "HASH_RT",
 779                 .pr_desc  = "dispatch routed PUT message by hashing source NID for wildcard portals"
 780         },
 781         {
 782                 .pr_value = -1,
 783                 .pr_name  = NULL,
 784                 .pr_desc  = NULL
 785         },
 786 };
 787
 788 static int __proc_lnet_portal_rotor(void *data, int write,
 789                                     loff_t pos, void __user *buffer, int nob)
 790 {
 791         const int buf_len = 128;
 792         char *buf;
 793         char *tmp;
 794         int rc;
 795         int i;
 796
 797         LIBCFS_ALLOC(buf, buf_len);
 798         if (!buf)
 799                 return -ENOMEM;
 800
 801         if (!write) {
 802                 lnet_res_lock(0);
 803
 804                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 805                         if (portal_rotors[i].pr_value == portal_rotor)
 806                                 break;
 807                 }
 808
 809                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 810                 lnet_res_unlock(0);
 811
 812                 rc = snprintf(buf, buf_len,
 813                               "{\n\tportals: all\n"
 814                               "\trotor: %s\n\tdescription: %s\n}",
 815                               portal_rotors[i].pr_name,
 816                               portal_rotors[i].pr_desc);
 817
 818                 if (pos >= min_t(int, rc, buf_len)) {
 819                         rc = 0;
 820                 } else {
 821                         rc = cfs_trace_copyout_string(buffer, nob,
 822                                                       buf + pos, "\n");
 823                 }
 824                 goto out;
 825         }
 826
 827         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 828         if (rc < 0)
 829                 goto out;
 830
 831         tmp = cfs_trimwhite(buf);
 832
 833         rc = -EINVAL;
 834         lnet_res_lock(0);
 835         for (i = 0; portal_rotors[i].pr_name; i++) {
 836                 if (!strncasecmp(portal_rotors[i].pr_name, tmp,
 837                                  strlen(portal_rotors[i].pr_name))) {
 838                         portal_rotor = portal_rotors[i].pr_value;
 839                         rc = 0;
 840                         break;
 841                 }
 842         }
 843         lnet_res_unlock(0);
 844 out:
 845         LIBCFS_FREE(buf, buf_len);
 846         return rc;
 847 }
 848
 849 static int proc_lnet_portal_rotor(struct ctl_table *table, int write,
 850                                   void __user *buffer, size_t *lenp,
 851                                   loff_t *ppos)
 852 {
 853         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 854                                     __proc_lnet_portal_rotor);
 855 }
 856
 857 static struct ctl_table lnet_table[] = {
 858         /*
 859          * NB No .strategy entries have been provided since sysctl(8) prefers
 860          * to go via /proc for portability.
 861          */
 862         {
 863                 .procname     = "stats",
 864                 .mode         = 0644,
 865                 .proc_handler = &proc_lnet_stats,
 866         },
 867         {
 868                 .procname     = "routes",
 869                 .mode         = 0444,
 870                 .proc_handler = &proc_lnet_routes,
 871         },
 872         {
 873                 .procname     = "routers",
 874                 .mode         = 0444,
 875                 .proc_handler = &proc_lnet_routers,
 876         },
 877         {
 878                 .procname     = "peers",
 879                 .mode         = 0444,
 880                 .proc_handler = &proc_lnet_peers,
 881         },
 882         {
 883                 .procname     = "buffers",
 884                 .mode         = 0444,
 885                 .proc_handler = &proc_lnet_buffers,
 886         },
 887         {
 888                 .procname     = "nis",
 889                 .mode         = 0444,
 890                 .proc_handler = &proc_lnet_nis,
 891         },
 892         {
 893                 .procname     = "portal_rotor",
 894                 .mode         = 0644,
 895                 .proc_handler = &proc_lnet_portal_rotor,
 896         },
 897         {
 898         }
 899 };
 900
 901 void lnet_router_debugfs_init(void)
 902 {
 903         lustre_insert_debugfs(lnet_table, NULL);
 904 }
 905
 906 void lnet_router_debugfs_fini(void)
 907 {
 908 }