lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2015, Intel Corporation.
   5  *
   6  *   This file is part of Lustre, https://wiki.hpdd.intel.com/
   7  *
   8  *   Portals is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Portals is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Portals; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define DEBUG_SUBSYSTEM S_LNET
  24 #include <libcfs/libcfs.h>
  25 #include <lnet/lib-lnet.h>
  26
  27 /* This is really lnet_proc.c. You might need to update sanity test 215
  28  * if any file format is changed. */
  29
  30 static struct ctl_table_header *lnet_table_header = NULL;
  31
  32 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  33 /*
  34  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  35  */
  36 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  37 /* change version, 16 bits or 8 bits */
  38 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  39
  40 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  41 /*
  42  * bits for peer hash offset
  43  * NB: we don't use the highest bit of *ppos because it's signed
  44  */
  45 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  46                                  LNET_PROC_CPT_BITS -    \
  47                                  LNET_PROC_VER_BITS -    \
  48                                  LNET_PROC_HASH_BITS - 1)
  49 /* bits for hash index + position */
  50 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  51 /* bits for peer hash table + hash version */
  52 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  53
  54 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  55 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  56 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  57 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  58
  59 #define LNET_PROC_CPT_GET(pos)                          \
  60         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  61
  62 #define LNET_PROC_VER_GET(pos)                          \
  63         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  64
  65 #define LNET_PROC_HASH_GET(pos)                         \
  66         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  67
  68 #define LNET_PROC_HOFF_GET(pos)                         \
  69         (int)((pos) & LNET_PROC_HOFF_MASK)
  70
  71 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  72         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  73         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  74         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  75         ((off) & LNET_PROC_HOFF_MASK))
  76
  77 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  78
  79 static int __proc_lnet_stats(void *data, int write,
  80                              loff_t pos, void __user *buffer, int nob)
  81 {
  82         int              rc;
  83         lnet_counters_t *ctrs;
  84         int              len;
  85         char            *tmpstr;
  86         const int        tmpsiz = 256; /* 7 %u and 4 __u64 */
  87
  88         if (write) {
  89                 lnet_counters_reset();
  90                 return 0;
  91         }
  92
  93         /* read */
  94
  95         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  96         if (ctrs == NULL)
  97                 return -ENOMEM;
  98
  99         LIBCFS_ALLOC(tmpstr, tmpsiz);
 100         if (tmpstr == NULL) {
 101                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 102                 return -ENOMEM;
 103         }
 104
 105         lnet_counters_get(ctrs);
 106
 107         len = snprintf(tmpstr, tmpsiz,
 108                        "%u %u %u %u %u %u %u %llu %llu "
 109                        "%llu %llu",
 110                        ctrs->msgs_alloc, ctrs->msgs_max,
 111                        ctrs->errors,
 112                        ctrs->send_count, ctrs->recv_count,
 113                        ctrs->route_count, ctrs->drop_count,
 114                        ctrs->send_length, ctrs->recv_length,
 115                        ctrs->route_length, ctrs->drop_length);
 116
 117         if (pos >= min_t(int, len, strlen(tmpstr)))
 118                 rc = 0;
 119         else
 120                 rc = cfs_trace_copyout_string(buffer, nob,
 121                                               tmpstr + pos, "\n");
 122
 123         LIBCFS_FREE(tmpstr, tmpsiz);
 124         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 125         return rc;
 126 }
 127
 128 static int
 129 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 130                 size_t *lenp, loff_t *ppos)
 131 {
 132         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 133                                     __proc_lnet_stats);
 134 }
 135
 136 static int
 137 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 138                  size_t *lenp, loff_t *ppos)
 139 {
 140         const int       tmpsiz = 256;
 141         char            *tmpstr;
 142         char            *s;
 143         int             rc = 0;
 144         int             len;
 145         int             ver;
 146         int             off;
 147
 148         CLASSERT(sizeof(loff_t) >= 4);
 149
 150         off = LNET_PROC_HOFF_GET(*ppos);
 151         ver = LNET_PROC_VER_GET(*ppos);
 152
 153         LASSERT(!write);
 154
 155         if (*lenp == 0)
 156                 return 0;
 157
 158         LIBCFS_ALLOC(tmpstr, tmpsiz);
 159         if (tmpstr == NULL)
 160                 return -ENOMEM;
 161
 162         s = tmpstr; /* points to current position in tmpstr[] */
 163
 164         if (*ppos == 0) {
 165                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 166                               the_lnet.ln_routing ? "enabled" : "disabled");
 167                 LASSERT(tmpstr + tmpsiz - s > 0);
 168
 169                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 170                               "net", "hops", "priority", "state", "router");
 171                 LASSERT(tmpstr + tmpsiz - s > 0);
 172
 173                 lnet_net_lock(0);
 174                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 175                 lnet_net_unlock(0);
 176                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 177         } else {
 178                 struct list_head        *n;
 179                 struct list_head        *r;
 180                 lnet_route_t            *route = NULL;
 181                 lnet_remotenet_t        *rnet  = NULL;
 182                 int                     skip  = off - 1;
 183                 struct list_head        *rn_list;
 184                 int                     i;
 185
 186                 lnet_net_lock(0);
 187
 188                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 189                         lnet_net_unlock(0);
 190                         LIBCFS_FREE(tmpstr, tmpsiz);
 191                         return -ESTALE;
 192                 }
 193
 194                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 195                      i++) {
 196                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 197
 198                         n = rn_list->next;
 199
 200                         while (n != rn_list && route == NULL) {
 201                                 rnet = list_entry(n, lnet_remotenet_t,
 202                                                   lrn_list);
 203
 204                                 r = rnet->lrn_routes.next;
 205
 206                                 while (r != &rnet->lrn_routes) {
 207                                         lnet_route_t *re =
 208                                                 list_entry(r, lnet_route_t,
 209                                                            lr_list);
 210                                         if (skip == 0) {
 211                                                 route = re;
 212                                                 break;
 213                                         }
 214
 215                                         skip--;
 216                                         r = r->next;
 217                                 }
 218
 219                                 n = n->next;
 220                         }
 221                 }
 222
 223                 if (route != NULL) {
 224                         __u32        net        = rnet->lrn_net;
 225                         __u32 hops              = route->lr_hops;
 226                         unsigned int priority   = route->lr_priority;
 227                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 228                         int          alive      = lnet_is_route_alive(route);
 229
 230                         s += snprintf(s, tmpstr + tmpsiz - s,
 231                                       "%-8s %4u %8u %7s %s\n",
 232                                       libcfs_net2str(net), hops,
 233                                       priority,
 234                                       alive ? "up" : "down",
 235                                       libcfs_nid2str(nid));
 236                         LASSERT(tmpstr + tmpsiz - s > 0);
 237                 }
 238
 239                 lnet_net_unlock(0);
 240         }
 241
 242         len = s - tmpstr;     /* how many bytes was written */
 243
 244         if (len > *lenp) {    /* linux-supplied buffer is too small */
 245                 rc = -EINVAL;
 246         } else if (len > 0) { /* wrote something */
 247                 if (copy_to_user(buffer, tmpstr, len))
 248                         rc = -EFAULT;
 249                 else {
 250                         off += 1;
 251                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 252                 }
 253         }
 254
 255         LIBCFS_FREE(tmpstr, tmpsiz);
 256
 257         if (rc == 0)
 258                 *lenp = len;
 259
 260         return rc;
 261 }
 262
 263 static int
 264 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 265                   size_t *lenp, loff_t *ppos)
 266 {
 267         int        rc = 0;
 268         char      *tmpstr;
 269         char      *s;
 270         const int  tmpsiz = 256;
 271         int        len;
 272         int        ver;
 273         int        off;
 274
 275         off = LNET_PROC_HOFF_GET(*ppos);
 276         ver = LNET_PROC_VER_GET(*ppos);
 277
 278         LASSERT(!write);
 279
 280         if (*lenp == 0)
 281                 return 0;
 282
 283         LIBCFS_ALLOC(tmpstr, tmpsiz);
 284         if (tmpstr == NULL)
 285                 return -ENOMEM;
 286
 287         s = tmpstr; /* points to current position in tmpstr[] */
 288
 289         if (*ppos == 0) {
 290                 s += snprintf(s, tmpstr + tmpsiz - s,
 291                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 292                               "ref", "rtr_ref", "alive_cnt", "state",
 293                               "last_ping", "ping_sent", "deadline",
 294                               "down_ni", "router");
 295                 LASSERT(tmpstr + tmpsiz - s > 0);
 296
 297                 lnet_net_lock(0);
 298                 ver = (unsigned int)the_lnet.ln_routers_version;
 299                 lnet_net_unlock(0);
 300                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 301         } else {
 302                 struct list_head *r;
 303                 struct lnet_peer *peer = NULL;
 304                 int               skip = off - 1;
 305
 306                 lnet_net_lock(0);
 307
 308                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 309                         lnet_net_unlock(0);
 310
 311                         LIBCFS_FREE(tmpstr, tmpsiz);
 312                         return -ESTALE;
 313                 }
 314
 315                 r = the_lnet.ln_routers.next;
 316
 317                 while (r != &the_lnet.ln_routers) {
 318                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 319                                                      lp_rtr_list);
 320
 321                         if (skip == 0) {
 322                                 peer = lp;
 323                                 break;
 324                         }
 325
 326                         skip--;
 327                         r = r->next;
 328                 }
 329
 330                 if (peer != NULL) {
 331                         lnet_nid_t nid = peer->lp_nid;
 332                         cfs_time_t now = cfs_time_current();
 333                         cfs_time_t deadline = peer->lp_ping_deadline;
 334                         int nrefs     = peer->lp_refcount;
 335                         int nrtrrefs  = peer->lp_rtr_refcount;
 336                         int alive_cnt = peer->lp_alive_count;
 337                         int alive     = peer->lp_alive;
 338                         int pingsent  = !peer->lp_ping_notsent;
 339                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 340                                                      peer->lp_ping_timestamp));
 341                         int down_ni   = 0;
 342                         lnet_route_t *rtr;
 343
 344                         if ((peer->lp_ping_feats &
 345                              LNET_PING_FEAT_NI_STATUS) != 0) {
 346                                 list_for_each_entry(rtr, &peer->lp_routes,
 347                                                     lr_gwlist) {
 348                                         /* downis on any route should be the
 349                                          * number of downis on the gateway */
 350                                         if (rtr->lr_downis != 0) {
 351                                                 down_ni = rtr->lr_downis;
 352                                                 break;
 353                                         }
 354                                 }
 355                         }
 356
 357                         if (deadline == 0)
 358                                 s += snprintf(s, tmpstr + tmpsiz - s,
 359                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 360                                               nrefs, nrtrrefs, alive_cnt,
 361                                               alive ? "up" : "down", last_ping,
 362                                               pingsent, "NA", down_ni,
 363                                               libcfs_nid2str(nid));
 364                         else
 365                                 s += snprintf(s, tmpstr + tmpsiz - s,
 366                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 367                                               nrefs, nrtrrefs, alive_cnt,
 368                                               alive ? "up" : "down", last_ping,
 369                                               pingsent,
 370                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 371                                               down_ni, libcfs_nid2str(nid));
 372                         LASSERT(tmpstr + tmpsiz - s > 0);
 373                 }
 374
 375                 lnet_net_unlock(0);
 376         }
 377
 378         len = s - tmpstr;     /* how many bytes was written */
 379
 380         if (len > *lenp) {    /* linux-supplied buffer is too small */
 381                 rc = -EINVAL;
 382         } else if (len > 0) { /* wrote something */
 383                 if (copy_to_user(buffer, tmpstr, len))
 384                         rc = -EFAULT;
 385                 else {
 386                         off += 1;
 387                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 388                 }
 389         }
 390
 391         LIBCFS_FREE(tmpstr, tmpsiz);
 392
 393         if (rc == 0)
 394                 *lenp = len;
 395
 396         return rc;
 397 }
 398
 399 static int
 400 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 401                 size_t *lenp, loff_t *ppos)
 402 {
 403         const int               tmpsiz  = 256;
 404         struct lnet_peer_table  *ptable;
 405         char                    *tmpstr;
 406         char                    *s;
 407         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 408         int                     ver  = LNET_PROC_VER_GET(*ppos);
 409         int                     hash = LNET_PROC_HASH_GET(*ppos);
 410         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 411         int                     rc = 0;
 412         int                     len;
 413
 414         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 415         LASSERT(!write);
 416
 417         if (*lenp == 0)
 418                 return 0;
 419
 420         if (cpt >= LNET_CPT_NUMBER) {
 421                 *lenp = 0;
 422                 return 0;
 423         }
 424
 425         LIBCFS_ALLOC(tmpstr, tmpsiz);
 426         if (tmpstr == NULL)
 427                 return -ENOMEM;
 428
 429         s = tmpstr; /* points to current position in tmpstr[] */
 430
 431         if (*ppos == 0) {
 432                 s += snprintf(s, tmpstr + tmpsiz - s,
 433                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 434                               "nid", "refs", "state", "last", "max",
 435                               "rtr", "min", "tx", "min", "queue");
 436                 LASSERT(tmpstr + tmpsiz - s > 0);
 437
 438                 hoff++;
 439         } else {
 440                 struct lnet_peer        *peer;
 441                 struct list_head        *p;
 442                 int                     skip;
 443  again:
 444                 p = NULL;
 445                 peer = NULL;
 446                 skip = hoff - 1;
 447
 448                 lnet_net_lock(cpt);
 449                 ptable = the_lnet.ln_peer_tables[cpt];
 450                 if (hoff == 1)
 451                         ver = LNET_PROC_VERSION(ptable->pt_version);
 452
 453                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 454                         lnet_net_unlock(cpt);
 455                         LIBCFS_FREE(tmpstr, tmpsiz);
 456                         return -ESTALE;
 457                 }
 458
 459                 while (hash < LNET_PEER_HASH_SIZE) {
 460                         if (p == NULL)
 461                                 p = ptable->pt_hash[hash].next;
 462
 463                         while (p != &ptable->pt_hash[hash]) {
 464                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 465                                                              lp_hashlist);
 466                                 if (skip == 0) {
 467                                         peer = lp;
 468
 469                                         /* minor optimization: start from idx+1
 470                                          * on next iteration if we've just
 471                                          * drained lp_hashlist */
 472                                         if (lp->lp_hashlist.next ==
 473                                             &ptable->pt_hash[hash]) {
 474                                                 hoff = 1;
 475                                                 hash++;
 476                                         } else {
 477                                                 hoff++;
 478                                         }
 479
 480                                         break;
 481                                 }
 482
 483                                 skip--;
 484                                 p = lp->lp_hashlist.next;
 485                         }
 486
 487                         if (peer != NULL)
 488                                 break;
 489
 490                         p = NULL;
 491                         hoff = 1;
 492                         hash++;
 493                 }
 494
 495                 if (peer != NULL) {
 496                         lnet_nid_t nid       = peer->lp_nid;
 497                         int nrefs     = peer->lp_refcount;
 498                         int lastalive = -1;
 499                         char *aliveness = "NA";
 500                         int maxcr = peer->lp_net->net_tunables.lct_peer_tx_credits;
 501                         int txcr = peer->lp_txcredits;
 502                         int mintxcr = peer->lp_mintxcredits;
 503                         int rtrcr = peer->lp_rtrcredits;
 504                         int minrtrcr = peer->lp_minrtrcredits;
 505                         int txqnob = peer->lp_txqnob;
 506
 507                         if (lnet_isrouter(peer) ||
 508                             lnet_peer_aliveness_enabled(peer))
 509                                 aliveness = peer->lp_alive ? "up" : "down";
 510
 511                         if (lnet_peer_aliveness_enabled(peer)) {
 512                                 cfs_time_t     now = cfs_time_current();
 513                                 cfs_duration_t delta;
 514
 515                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 516                                 lastalive = cfs_duration_sec(delta);
 517
 518                                 /* No need to mess up peers contents with
 519                                  * arbitrarily long integers - it suffices to
 520                                  * know that lastalive is more than 10000s old
 521                                  */
 522                                 if (lastalive >= 10000)
 523                                         lastalive = 9999;
 524                         }
 525
 526                         lnet_net_unlock(cpt);
 527
 528                         s += snprintf(s, tmpstr + tmpsiz - s,
 529                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 530                                       libcfs_nid2str(nid), nrefs, aliveness,
 531                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 532                                       mintxcr, txqnob);
 533                         LASSERT(tmpstr + tmpsiz - s > 0);
 534
 535                 } else { /* peer is NULL */
 536                         lnet_net_unlock(cpt);
 537                 }
 538
 539                 if (hash == LNET_PEER_HASH_SIZE) {
 540                         cpt++;
 541                         hash = 0;
 542                         hoff = 1;
 543                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 544                                 goto again;
 545                 }
 546         }
 547
 548         len = s - tmpstr;     /* how many bytes was written */
 549
 550         if (len > *lenp) {    /* linux-supplied buffer is too small */
 551                 rc = -EINVAL;
 552         } else if (len > 0) { /* wrote something */
 553                 if (copy_to_user(buffer, tmpstr, len))
 554                         rc = -EFAULT;
 555                 else
 556                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 557         }
 558
 559         LIBCFS_FREE(tmpstr, tmpsiz);
 560
 561         if (rc == 0)
 562                 *lenp = len;
 563
 564         return rc;
 565 }
 566
 567 static int __proc_lnet_buffers(void *data, int write,
 568                                loff_t pos, void __user *buffer, int nob)
 569 {
 570         char            *s;
 571         char            *tmpstr;
 572         int             tmpsiz;
 573         int             idx;
 574         int             len;
 575         int             rc;
 576         int             i;
 577
 578         LASSERT(!write);
 579
 580         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 581         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 582         LIBCFS_ALLOC(tmpstr, tmpsiz);
 583         if (tmpstr == NULL)
 584                 return -ENOMEM;
 585
 586         s = tmpstr; /* points to current position in tmpstr[] */
 587
 588         s += snprintf(s, tmpstr + tmpsiz - s,
 589                       "%5s %5s %7s %7s\n",
 590                       "pages", "count", "credits", "min");
 591         LASSERT(tmpstr + tmpsiz - s > 0);
 592
 593         if (the_lnet.ln_rtrpools == NULL)
 594                 goto out; /* I'm not a router */
 595
 596         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 597                 lnet_rtrbufpool_t *rbp;
 598
 599                 lnet_net_lock(LNET_LOCK_EX);
 600                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 601                         s += snprintf(s, tmpstr + tmpsiz - s,
 602                                       "%5d %5d %7d %7d\n",
 603                                       rbp[idx].rbp_npages,
 604                                       rbp[idx].rbp_nbuffers,
 605                                       rbp[idx].rbp_credits,
 606                                       rbp[idx].rbp_mincredits);
 607                         LASSERT(tmpstr + tmpsiz - s > 0);
 608                 }
 609                 lnet_net_unlock(LNET_LOCK_EX);
 610         }
 611
 612  out:
 613         len = s - tmpstr;
 614
 615         if (pos >= min_t(int, len, strlen(tmpstr)))
 616                 rc = 0;
 617         else
 618                 rc = cfs_trace_copyout_string(buffer, nob,
 619                                               tmpstr + pos, NULL);
 620
 621         LIBCFS_FREE(tmpstr, tmpsiz);
 622         return rc;
 623 }
 624
 625 static int
 626 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 627                   size_t *lenp, loff_t *ppos)
 628 {
 629         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 630                                     __proc_lnet_buffers);
 631 }
 632
 633 static int
 634 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 635               size_t *lenp, loff_t *ppos)
 636 {
 637         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 638         int        rc = 0;
 639         char      *tmpstr;
 640         char      *s;
 641         int        len;
 642
 643         LASSERT(!write);
 644
 645         if (*lenp == 0)
 646                 return 0;
 647
 648         LIBCFS_ALLOC(tmpstr, tmpsiz);
 649         if (tmpstr == NULL)
 650                 return -ENOMEM;
 651
 652         s = tmpstr; /* points to current position in tmpstr[] */
 653
 654         if (*ppos == 0) {
 655                 s += snprintf(s, tmpstr + tmpsiz - s,
 656                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 657                               "nid", "status", "alive", "refs", "peer",
 658                               "rtr", "max", "tx", "min");
 659                 LASSERT (tmpstr + tmpsiz - s > 0);
 660         } else {
 661                 lnet_ni_t         *ni   = NULL;
 662                 int                skip = *ppos - 1;
 663
 664                 lnet_net_lock(0);
 665
 666                 ni = lnet_get_ni_idx_locked(skip);
 667
 668                 if (ni != NULL) {
 669                         struct lnet_tx_queue    *tq;
 670                         char    *stat;
 671                         time64_t now = ktime_get_real_seconds();
 672                         int     last_alive = -1;
 673                         int     i;
 674                         int     j;
 675
 676                         if (the_lnet.ln_routing)
 677                                 last_alive = now - ni->ni_last_alive;
 678
 679                         /* @lo forever alive */
 680                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 681                                 last_alive = 0;
 682
 683                         lnet_ni_lock(ni);
 684                         LASSERT(ni->ni_status != NULL);
 685                         stat = (ni->ni_status->ns_status ==
 686                                 LNET_NI_STATUS_UP) ? "up" : "down";
 687                         lnet_ni_unlock(ni);
 688
 689                         /* we actually output credits information for
 690                          * TX queue of each partition */
 691                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 692                                 for (j = 0; ni->ni_cpts != NULL &&
 693                                      j < ni->ni_ncpts; j++) {
 694                                         if (i == ni->ni_cpts[j])
 695                                                 break;
 696                                 }
 697
 698                                 if (j == ni->ni_ncpts)
 699                                         continue;
 700
 701                                 if (i != 0)
 702                                         lnet_net_lock(i);
 703
 704                                 s += snprintf(s, tmpstr + tmpsiz - s,
 705                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 706                                       libcfs_nid2str(ni->ni_nid), stat,
 707                                       last_alive, *ni->ni_refs[i],
 708                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 709                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 710                                       tq->tq_credits_max,
 711                                       tq->tq_credits, tq->tq_credits_min);
 712                                 if (i != 0)
 713                                         lnet_net_unlock(i);
 714                         }
 715                         LASSERT(tmpstr + tmpsiz - s > 0);
 716                 }
 717
 718                 lnet_net_unlock(0);
 719         }
 720
 721         len = s - tmpstr;     /* how many bytes was written */
 722
 723         if (len > *lenp) {    /* linux-supplied buffer is too small */
 724                 rc = -EINVAL;
 725         } else if (len > 0) { /* wrote something */
 726                 if (copy_to_user(buffer, tmpstr, len))
 727                         rc = -EFAULT;
 728                 else
 729                         *ppos += 1;
 730         }
 731
 732         LIBCFS_FREE(tmpstr, tmpsiz);
 733
 734         if (rc == 0)
 735                 *lenp = len;
 736
 737         return rc;
 738 }
 739
 740 struct lnet_portal_rotors {
 741         int             pr_value;
 742         const char      *pr_name;
 743         const char      *pr_desc;
 744 };
 745
 746 static struct lnet_portal_rotors        portal_rotors[] = {
 747         {
 748                 .pr_value = LNET_PTL_ROTOR_OFF,
 749                 .pr_name  = "OFF",
 750                 .pr_desc  = "Turn off message rotor for wildcard portals"
 751         },
 752         {
 753                 .pr_value = LNET_PTL_ROTOR_ON,
 754                 .pr_name  = "ON",
 755                 .pr_desc  = "round-robin dispatch all PUT messages for "
 756                             "wildcard portals"
 757         },
 758         {
 759                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 760                 .pr_name  = "RR_RT",
 761                 .pr_desc  = "round-robin dispatch routed PUT message for "
 762                             "wildcard portals"
 763         },
 764         {
 765                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 766                 .pr_name  = "HASH_RT",
 767                 .pr_desc  = "dispatch routed PUT message by hashing source "
 768                             "NID for wildcard portals"
 769         },
 770         {
 771                 .pr_value = -1,
 772                 .pr_name  = NULL,
 773                 .pr_desc  = NULL
 774         },
 775 };
 776
 777 static int __proc_lnet_portal_rotor(void *data, int write,
 778                                     loff_t pos, void __user *buffer, int nob)
 779 {
 780         const int       buf_len = 128;
 781         char            *buf;
 782         char            *tmp;
 783         int             rc;
 784         int             i;
 785
 786         LIBCFS_ALLOC(buf, buf_len);
 787         if (buf == NULL)
 788                 return -ENOMEM;
 789
 790         if (!write) {
 791                 lnet_res_lock(0);
 792
 793                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 794                         if (portal_rotors[i].pr_value == portal_rotor)
 795                                 break;
 796                 }
 797
 798                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 799                 lnet_res_unlock(0);
 800
 801                 rc = snprintf(buf, buf_len,
 802                               "{\n\tportals: all\n"
 803                               "\trotor: %s\n\tdescription: %s\n}",
 804                               portal_rotors[i].pr_name,
 805                               portal_rotors[i].pr_desc);
 806
 807                 if (pos >= min_t(int, rc, buf_len)) {
 808                         rc = 0;
 809                 } else {
 810                         rc = cfs_trace_copyout_string(buffer, nob,
 811                                         buf + pos, "\n");
 812                 }
 813                 goto out;
 814         }
 815
 816         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 817         if (rc < 0)
 818                 goto out;
 819
 820         tmp = cfs_trimwhite(buf);
 821
 822         rc = -EINVAL;
 823         lnet_res_lock(0);
 824         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 825                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 826                                 strlen(portal_rotors[i].pr_name)) == 0) {
 827                         portal_rotor = portal_rotors[i].pr_value;
 828                         rc = 0;
 829                         break;
 830                 }
 831         }
 832         lnet_res_unlock(0);
 833 out:
 834         LIBCFS_FREE(buf, buf_len);
 835         return rc;
 836 }
 837
 838 static int
 839 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 840                        size_t *lenp, loff_t *ppos)
 841 {
 842         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 843                                     __proc_lnet_portal_rotor);
 844 }
 845
 846
 847 static struct ctl_table lnet_table[] = {
 848         /*
 849          * NB No .strategy entries have been provided since sysctl(8) prefers
 850          * to go via /proc for portability.
 851          */
 852         {
 853                 INIT_CTL_NAME
 854                 .procname       = "stats",
 855                 .mode           = 0644,
 856                 .proc_handler   = &proc_lnet_stats,
 857         },
 858         {
 859                 INIT_CTL_NAME
 860                 .procname       = "routes",
 861                 .mode           = 0444,
 862                 .proc_handler   = &proc_lnet_routes,
 863         },
 864         {
 865                 INIT_CTL_NAME
 866                 .procname       = "routers",
 867                 .mode           = 0444,
 868                 .proc_handler   = &proc_lnet_routers,
 869         },
 870         {
 871                 INIT_CTL_NAME
 872                 .procname       = "peers",
 873                 .mode           = 0444,
 874                 .proc_handler   = &proc_lnet_peers,
 875         },
 876         {
 877                 INIT_CTL_NAME
 878                 .procname       = "buffers",
 879                 .mode           = 0444,
 880                 .proc_handler   = &proc_lnet_buffers,
 881         },
 882         {
 883                 INIT_CTL_NAME
 884                 .procname       = "nis",
 885                 .mode           = 0444,
 886                 .proc_handler   = &proc_lnet_nis,
 887         },
 888         {
 889                 INIT_CTL_NAME
 890                 .procname       = "portal_rotor",
 891                 .mode           = 0644,
 892                 .proc_handler   = &proc_lnet_portal_rotor,
 893         },
 894         { 0 }
 895 };
 896
 897 static struct ctl_table top_table[] = {
 898         {
 899                 INIT_CTL_NAME
 900                 .procname       = "lnet",
 901                 .mode           = 0555,
 902                 .data           = NULL,
 903                 .maxlen         = 0,
 904                 .child          = lnet_table,
 905         },
 906         { 0 }
 907 };
 908
 909 void
 910 lnet_proc_init(void)
 911 {
 912 #ifdef CONFIG_SYSCTL
 913         if (lnet_table_header == NULL)
 914                 lnet_table_header = register_sysctl_table(top_table);
 915 #endif
 916 }
 917
 918 void
 919 lnet_proc_fini(void)
 920 {
 921 #ifdef CONFIG_SYSCTL
 922         if (lnet_table_header != NULL)
 923                 unregister_sysctl_table(lnet_table_header);
 924
 925         lnet_table_header = NULL;
 926 #endif
 927 }