lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2013, 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  *   You should have received a copy of the GNU General Public License
  19  *   along with Portals; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LNET
  25 #include <libcfs/libcfs.h>
  26 #include <lnet/lib-lnet.h>
  27
  28 /* This is really lnet_proc.c. You might need to update sanity test 215
  29  * if any file format is changed. */
  30
  31 static struct ctl_table_header *lnet_table_header = NULL;
  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         lnet_counters_t *ctrs;
  85         int              len;
  86         char            *tmpstr;
  87         const int        tmpsiz = 256; /* 7 %u and 4 LPU64 */
  88
  89         if (write) {
  90                 lnet_counters_reset();
  91                 return 0;
  92         }
  93
  94         /* read */
  95
  96         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  97         if (ctrs == NULL)
  98                 return -ENOMEM;
  99
 100         LIBCFS_ALLOC(tmpstr, tmpsiz);
 101         if (tmpstr == NULL) {
 102                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 103                 return -ENOMEM;
 104         }
 105
 106         lnet_counters_get(ctrs);
 107
 108         len = snprintf(tmpstr, tmpsiz,
 109                        "%u %u %u %u %u %u %u "LPU64" "LPU64" "
 110                        LPU64" "LPU64,
 111                        ctrs->msgs_alloc, ctrs->msgs_max,
 112                        ctrs->errors,
 113                        ctrs->send_count, ctrs->recv_count,
 114                        ctrs->route_count, ctrs->drop_count,
 115                        ctrs->send_length, ctrs->recv_length,
 116                        ctrs->route_length, ctrs->drop_length);
 117
 118         if (pos >= min_t(int, len, strlen(tmpstr)))
 119                 rc = 0;
 120         else
 121                 rc = cfs_trace_copyout_string(buffer, nob,
 122                                               tmpstr + pos, "\n");
 123
 124         LIBCFS_FREE(tmpstr, tmpsiz);
 125         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 126         return rc;
 127 }
 128
 129 static int
 130 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 131                 size_t *lenp, loff_t *ppos)
 132 {
 133         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 134                                     __proc_lnet_stats);
 135 }
 136
 137 static int
 138 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 139                  size_t *lenp, loff_t *ppos)
 140 {
 141         const int       tmpsiz = 256;
 142         char            *tmpstr;
 143         char            *s;
 144         int             rc = 0;
 145         int             len;
 146         int             ver;
 147         int             off;
 148
 149         CLASSERT(sizeof(loff_t) >= 4);
 150
 151         off = LNET_PROC_HOFF_GET(*ppos);
 152         ver = LNET_PROC_VER_GET(*ppos);
 153
 154         LASSERT (!write);
 155
 156         if (*lenp == 0)
 157                 return 0;
 158
 159         LIBCFS_ALLOC(tmpstr, tmpsiz);
 160         if (tmpstr == NULL)
 161                 return -ENOMEM;
 162
 163         s = tmpstr; /* points to current position in tmpstr[] */
 164
 165         if (*ppos == 0) {
 166                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 167                               the_lnet.ln_routing ? "enabled" : "disabled");
 168                 LASSERT (tmpstr + tmpsiz - s > 0);
 169
 170                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 171                               "net", "hops", "priority", "state", "router");
 172                 LASSERT (tmpstr + tmpsiz - s > 0);
 173
 174                 lnet_net_lock(0);
 175                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 176                 lnet_net_unlock(0);
 177                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 178         } else {
 179                 struct list_head        *n;
 180                 struct list_head        *r;
 181                 lnet_route_t            *route = NULL;
 182                 lnet_remotenet_t        *rnet  = NULL;
 183                 int                     skip  = off - 1;
 184                 struct list_head        *rn_list;
 185                 int                     i;
 186
 187                 lnet_net_lock(0);
 188
 189                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 190                         lnet_net_unlock(0);
 191                         LIBCFS_FREE(tmpstr, tmpsiz);
 192                         return -ESTALE;
 193                 }
 194
 195                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 196                      i++) {
 197                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 198
 199                         n = rn_list->next;
 200
 201                         while (n != rn_list && route == NULL) {
 202                                 rnet = list_entry(n, lnet_remotenet_t,
 203                                                   lrn_list);
 204
 205                                 r = rnet->lrn_routes.next;
 206
 207                                 while (r != &rnet->lrn_routes) {
 208                                         lnet_route_t *re =
 209                                                 list_entry(r, lnet_route_t,
 210                                                            lr_list);
 211                                         if (skip == 0) {
 212                                                 route = re;
 213                                                 break;
 214                                         }
 215
 216                                         skip--;
 217                                         r = r->next;
 218                                 }
 219
 220                                 n = n->next;
 221                         }
 222                 }
 223
 224                 if (route != NULL) {
 225                         __u32        net        = rnet->lrn_net;
 226                         unsigned int hops       = route->lr_hops;
 227                         unsigned int priority   = route->lr_priority;
 228                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 229                         int          alive      = lnet_is_route_alive(route);
 230
 231                         s += snprintf(s, tmpstr + tmpsiz - s,
 232                                       "%-8s %4u %8u %7s %s\n",
 233                                       libcfs_net2str(net), hops,
 234                                       priority,
 235                                       alive ? "up" : "down",
 236                                       libcfs_nid2str(nid));
 237                         LASSERT(tmpstr + tmpsiz - s > 0);
 238                 }
 239
 240                 lnet_net_unlock(0);
 241         }
 242
 243         len = s - tmpstr;     /* how many bytes was written */
 244
 245         if (len > *lenp) {    /* linux-supplied buffer is too small */
 246                 rc = -EINVAL;
 247         } else if (len > 0) { /* wrote something */
 248                 if (copy_to_user(buffer, tmpstr, len))
 249                         rc = -EFAULT;
 250                 else {
 251                         off += 1;
 252                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 253                 }
 254         }
 255
 256         LIBCFS_FREE(tmpstr, tmpsiz);
 257
 258         if (rc == 0)
 259                 *lenp = len;
 260
 261         return rc;
 262 }
 263
 264 static int
 265 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 266                   size_t *lenp, loff_t *ppos)
 267 {
 268         int        rc = 0;
 269         char      *tmpstr;
 270         char      *s;
 271         const int  tmpsiz = 256;
 272         int        len;
 273         int        ver;
 274         int        off;
 275
 276         off = LNET_PROC_HOFF_GET(*ppos);
 277         ver = LNET_PROC_VER_GET(*ppos);
 278
 279         LASSERT (!write);
 280
 281         if (*lenp == 0)
 282                 return 0;
 283
 284         LIBCFS_ALLOC(tmpstr, tmpsiz);
 285         if (tmpstr == NULL)
 286                 return -ENOMEM;
 287
 288         s = tmpstr; /* points to current position in tmpstr[] */
 289
 290         if (*ppos == 0) {
 291                 s += snprintf(s, tmpstr + tmpsiz - s,
 292                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 293                               "ref", "rtr_ref", "alive_cnt", "state",
 294                               "last_ping", "ping_sent", "deadline",
 295                               "down_ni", "router");
 296                 LASSERT(tmpstr + tmpsiz - s > 0);
 297
 298                 lnet_net_lock(0);
 299                 ver = (unsigned int)the_lnet.ln_routers_version;
 300                 lnet_net_unlock(0);
 301                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 302         } else {
 303                 struct list_head *r;
 304                 struct lnet_peer *peer = NULL;
 305                 int               skip = off - 1;
 306
 307                 lnet_net_lock(0);
 308
 309                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 310                         lnet_net_unlock(0);
 311
 312                         LIBCFS_FREE(tmpstr, tmpsiz);
 313                         return -ESTALE;
 314                 }
 315
 316                 r = the_lnet.ln_routers.next;
 317
 318                 while (r != &the_lnet.ln_routers) {
 319                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 320                                                      lp_rtr_list);
 321
 322                         if (skip == 0) {
 323                                 peer = lp;
 324                                 break;
 325                         }
 326
 327                         skip--;
 328                         r = r->next;
 329                 }
 330
 331                 if (peer != NULL) {
 332                         lnet_nid_t nid = peer->lp_nid;
 333                         cfs_time_t now = cfs_time_current();
 334                         cfs_time_t deadline = peer->lp_ping_deadline;
 335                         int nrefs     = peer->lp_refcount;
 336                         int nrtrrefs  = peer->lp_rtr_refcount;
 337                         int alive_cnt = peer->lp_alive_count;
 338                         int alive     = peer->lp_alive;
 339                         int pingsent  = !peer->lp_ping_notsent;
 340                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 341                                                      peer->lp_ping_timestamp));
 342                         int down_ni   = 0;
 343                         lnet_route_t *rtr;
 344
 345                         if ((peer->lp_ping_feats &
 346                              LNET_PING_FEAT_NI_STATUS) != 0) {
 347                                 list_for_each_entry(rtr, &peer->lp_routes,
 348                                                     lr_gwlist) {
 349                                         /* downis on any route should be the
 350                                          * number of downis on the gateway */
 351                                         if (rtr->lr_downis != 0) {
 352                                                 down_ni = rtr->lr_downis;
 353                                                 break;
 354                                         }
 355                                 }
 356                         }
 357
 358                         if (deadline == 0)
 359                                 s += snprintf(s, tmpstr + tmpsiz - s,
 360                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 361                                               nrefs, nrtrrefs, alive_cnt,
 362                                               alive ? "up" : "down", last_ping,
 363                                               pingsent, "NA", down_ni,
 364                                               libcfs_nid2str(nid));
 365                         else
 366                                 s += snprintf(s, tmpstr + tmpsiz - s,
 367                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 368                                               nrefs, nrtrrefs, alive_cnt,
 369                                               alive ? "up" : "down", last_ping,
 370                                               pingsent,
 371                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 372                                               down_ni, libcfs_nid2str(nid));
 373                         LASSERT (tmpstr + tmpsiz - s > 0);
 374                 }
 375
 376                 lnet_net_unlock(0);
 377         }
 378
 379         len = s - tmpstr;     /* how many bytes was written */
 380
 381         if (len > *lenp) {    /* linux-supplied buffer is too small */
 382                 rc = -EINVAL;
 383         } else if (len > 0) { /* wrote something */
 384                 if (copy_to_user(buffer, tmpstr, len))
 385                         rc = -EFAULT;
 386                 else {
 387                         off += 1;
 388                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 389                 }
 390         }
 391
 392         LIBCFS_FREE(tmpstr, tmpsiz);
 393
 394         if (rc == 0)
 395                 *lenp = len;
 396
 397         return rc;
 398 }
 399
 400 static int
 401 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 402                 size_t *lenp, loff_t *ppos)
 403 {
 404         const int               tmpsiz  = 256;
 405         struct lnet_peer_table  *ptable;
 406         char                    *tmpstr;
 407         char                    *s;
 408         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 409         int                     ver  = LNET_PROC_VER_GET(*ppos);
 410         int                     hash = LNET_PROC_HASH_GET(*ppos);
 411         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 412         int                     rc = 0;
 413         int                     len;
 414
 415         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 416         LASSERT(!write);
 417
 418         if (*lenp == 0)
 419                 return 0;
 420
 421         if (cpt >= LNET_CPT_NUMBER) {
 422                 *lenp = 0;
 423                 return 0;
 424         }
 425
 426         LIBCFS_ALLOC(tmpstr, tmpsiz);
 427         if (tmpstr == NULL)
 428                 return -ENOMEM;
 429
 430         s = tmpstr; /* points to current position in tmpstr[] */
 431
 432         if (*ppos == 0) {
 433                 s += snprintf(s, tmpstr + tmpsiz - s,
 434                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 435                               "nid", "refs", "state", "last", "max",
 436                               "rtr", "min", "tx", "min", "queue");
 437                 LASSERT (tmpstr + tmpsiz - s > 0);
 438
 439                 hoff++;
 440         } else {
 441                 struct lnet_peer        *peer;
 442                 struct list_head        *p;
 443                 int                     skip;
 444  again:
 445                 p = NULL;
 446                 peer = NULL;
 447                 skip = hoff - 1;
 448
 449                 lnet_net_lock(cpt);
 450                 ptable = the_lnet.ln_peer_tables[cpt];
 451                 if (hoff == 1)
 452                         ver = LNET_PROC_VERSION(ptable->pt_version);
 453
 454                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 455                         lnet_net_unlock(cpt);
 456                         LIBCFS_FREE(tmpstr, tmpsiz);
 457                         return -ESTALE;
 458                 }
 459
 460                 while (hash < LNET_PEER_HASH_SIZE) {
 461                         if (p == NULL)
 462                                 p = ptable->pt_hash[hash].next;
 463
 464                         while (p != &ptable->pt_hash[hash]) {
 465                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 466                                                              lp_hashlist);
 467                                 if (skip == 0) {
 468                                         peer = lp;
 469
 470                                         /* minor optimization: start from idx+1
 471                                          * on next iteration if we've just
 472                                          * drained lp_hashlist */
 473                                         if (lp->lp_hashlist.next ==
 474                                             &ptable->pt_hash[hash]) {
 475                                                 hoff = 1;
 476                                                 hash++;
 477                                         } else {
 478                                                 hoff++;
 479                                         }
 480
 481                                         break;
 482                                 }
 483
 484                                 skip--;
 485                                 p = lp->lp_hashlist.next;
 486                         }
 487
 488                         if (peer != NULL)
 489                                 break;
 490
 491                         p = NULL;
 492                         hoff = 1;
 493                         hash++;
 494                 }
 495
 496                 if (peer != NULL) {
 497                         lnet_nid_t nid       = peer->lp_nid;
 498                         int        nrefs     = peer->lp_refcount;
 499                         int        lastalive = -1;
 500                         char      *aliveness = "NA";
 501                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 502                         int        txcr      = peer->lp_txcredits;
 503                         int        mintxcr   = peer->lp_mintxcredits;
 504                         int        rtrcr     = peer->lp_rtrcredits;
 505                         int        minrtrcr  = peer->lp_minrtrcredits;
 506                         int        txqnob    = peer->lp_txqnob;
 507
 508                         if (lnet_isrouter(peer) ||
 509                             lnet_peer_aliveness_enabled(peer))
 510                                 aliveness = peer->lp_alive ? "up" : "down";
 511
 512                         if (lnet_peer_aliveness_enabled(peer)) {
 513                                 cfs_time_t     now = cfs_time_current();
 514                                 cfs_duration_t delta;
 515
 516                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 517                                 lastalive = cfs_duration_sec(delta);
 518
 519                                 /* No need to mess up peers contents with
 520                                  * arbitrarily long integers - it suffices to
 521                                  * know that lastalive is more than 10000s old
 522                                  */
 523                                 if (lastalive >= 10000)
 524                                         lastalive = 9999;
 525                         }
 526
 527                         lnet_net_unlock(cpt);
 528
 529                         s += snprintf(s, tmpstr + tmpsiz - s,
 530                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 531                                       libcfs_nid2str(nid), nrefs, aliveness,
 532                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 533                                       mintxcr, txqnob);
 534                         LASSERT (tmpstr + tmpsiz - s > 0);
 535
 536                 } else { /* peer is NULL */
 537                         lnet_net_unlock(cpt);
 538                 }
 539
 540                 if (hash == LNET_PEER_HASH_SIZE) {
 541                         cpt++;
 542                         hash = 0;
 543                         hoff = 1;
 544                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 545                                 goto again;
 546                 }
 547         }
 548
 549         len = s - tmpstr;     /* how many bytes was written */
 550
 551         if (len > *lenp) {    /* linux-supplied buffer is too small */
 552                 rc = -EINVAL;
 553         } else if (len > 0) { /* wrote something */
 554                 if (copy_to_user(buffer, tmpstr, len))
 555                         rc = -EFAULT;
 556                 else
 557                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 558         }
 559
 560         LIBCFS_FREE(tmpstr, tmpsiz);
 561
 562         if (rc == 0)
 563                 *lenp = len;
 564
 565         return rc;
 566 }
 567
 568 static int __proc_lnet_buffers(void *data, int write,
 569                                loff_t pos, void __user *buffer, int nob)
 570 {
 571         char            *s;
 572         char            *tmpstr;
 573         int             tmpsiz;
 574         int             idx;
 575         int             len;
 576         int             rc;
 577         int             i;
 578
 579         LASSERT(!write);
 580
 581         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 582         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 583         LIBCFS_ALLOC(tmpstr, tmpsiz);
 584         if (tmpstr == NULL)
 585                 return -ENOMEM;
 586
 587         s = tmpstr; /* points to current position in tmpstr[] */
 588
 589         s += snprintf(s, tmpstr + tmpsiz - s,
 590                       "%5s %5s %7s %7s\n",
 591                       "pages", "count", "credits", "min");
 592         LASSERT (tmpstr + tmpsiz - s > 0);
 593
 594         if (the_lnet.ln_rtrpools == NULL)
 595                 goto out; /* I'm not a router */
 596
 597         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 598                 lnet_rtrbufpool_t *rbp;
 599
 600                 lnet_net_lock(LNET_LOCK_EX);
 601                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 602                         s += snprintf(s, tmpstr + tmpsiz - s,
 603                                       "%5d %5d %7d %7d\n",
 604                                       rbp[idx].rbp_npages,
 605                                       rbp[idx].rbp_nbuffers,
 606                                       rbp[idx].rbp_credits,
 607                                       rbp[idx].rbp_mincredits);
 608                         LASSERT(tmpstr + tmpsiz - s > 0);
 609                 }
 610                 lnet_net_unlock(LNET_LOCK_EX);
 611         }
 612
 613  out:
 614         len = s - tmpstr;
 615
 616         if (pos >= min_t(int, len, strlen(tmpstr)))
 617                 rc = 0;
 618         else
 619                 rc = cfs_trace_copyout_string(buffer, nob,
 620                                               tmpstr + pos, NULL);
 621
 622         LIBCFS_FREE(tmpstr, tmpsiz);
 623         return rc;
 624 }
 625
 626 static int
 627 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 628                   size_t *lenp, loff_t *ppos)
 629 {
 630         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 631                                     __proc_lnet_buffers);
 632 }
 633
 634 static int
 635 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 636               size_t *lenp, loff_t *ppos)
 637 {
 638         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 639         int        rc = 0;
 640         char      *tmpstr;
 641         char      *s;
 642         int        len;
 643
 644         LASSERT (!write);
 645
 646         if (*lenp == 0)
 647                 return 0;
 648
 649         LIBCFS_ALLOC(tmpstr, tmpsiz);
 650         if (tmpstr == NULL)
 651                 return -ENOMEM;
 652
 653         s = tmpstr; /* points to current position in tmpstr[] */
 654
 655         if (*ppos == 0) {
 656                 s += snprintf(s, tmpstr + tmpsiz - s,
 657                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 658                               "nid", "status", "alive", "refs", "peer",
 659                               "rtr", "max", "tx", "min");
 660                 LASSERT (tmpstr + tmpsiz - s > 0);
 661         } else {
 662                 struct list_head  *n;
 663                 lnet_ni_t         *ni   = NULL;
 664                 int                skip = *ppos - 1;
 665
 666                 lnet_net_lock(0);
 667
 668                 n = the_lnet.ln_nis.next;
 669
 670                 while (n != &the_lnet.ln_nis) {
 671                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 672
 673                         if (skip == 0) {
 674                                 ni = a_ni;
 675                                 break;
 676                         }
 677
 678                         skip--;
 679                         n = n->next;
 680                 }
 681
 682                 if (ni != NULL) {
 683                         struct lnet_tx_queue    *tq;
 684                         char    *stat;
 685                         long    now = cfs_time_current_sec();
 686                         int     last_alive = -1;
 687                         int     i;
 688                         int     j;
 689
 690                         if (the_lnet.ln_routing)
 691                                 last_alive = now - ni->ni_last_alive;
 692
 693                         /* @lo forever alive */
 694                         if (ni->ni_lnd->lnd_type == LOLND)
 695                                 last_alive = 0;
 696
 697                         lnet_ni_lock(ni);
 698                         LASSERT(ni->ni_status != NULL);
 699                         stat = (ni->ni_status->ns_status ==
 700                                 LNET_NI_STATUS_UP) ? "up" : "down";
 701                         lnet_ni_unlock(ni);
 702
 703                         /* we actually output credits information for
 704                          * TX queue of each partition */
 705                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 706                                 for (j = 0; ni->ni_cpts != NULL &&
 707                                      j < ni->ni_ncpts; j++) {
 708                                         if (i == ni->ni_cpts[j])
 709                                                 break;
 710                                 }
 711
 712                                 if (j == ni->ni_ncpts)
 713                                         continue;
 714
 715                                 if (i != 0)
 716                                         lnet_net_lock(i);
 717
 718                                 s += snprintf(s, tmpstr + tmpsiz - s,
 719                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 720                                       libcfs_nid2str(ni->ni_nid), stat,
 721                                       last_alive, *ni->ni_refs[i],
 722                                       ni->ni_peertxcredits,
 723                                       ni->ni_peerrtrcredits,
 724                                       tq->tq_credits_max,
 725                                       tq->tq_credits, tq->tq_credits_min);
 726                                 if (i != 0)
 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 == 0)
 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 "
 770                             "wildcard portals"
 771         },
 772         {
 773                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 774                 .pr_name  = "RR_RT",
 775                 .pr_desc  = "round-robin dispatch routed PUT message for "
 776                             "wildcard portals"
 777         },
 778         {
 779                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 780                 .pr_name  = "HASH_RT",
 781                 .pr_desc  = "dispatch routed PUT message by hashing source "
 782                             "NID for wildcard portals"
 783         },
 784         {
 785                 .pr_value = -1,
 786                 .pr_name  = NULL,
 787                 .pr_desc  = NULL
 788         },
 789 };
 790
 791 static int __proc_lnet_portal_rotor(void *data, int write,
 792                                     loff_t pos, void __user *buffer, int nob)
 793 {
 794         const int       buf_len = 128;
 795         char            *buf;
 796         char            *tmp;
 797         int             rc;
 798         int             i;
 799
 800         LIBCFS_ALLOC(buf, buf_len);
 801         if (buf == NULL)
 802                 return -ENOMEM;
 803
 804         if (!write) {
 805                 lnet_res_lock(0);
 806
 807                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 808                         if (portal_rotors[i].pr_value == portal_rotor)
 809                                 break;
 810                 }
 811
 812                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 813                 lnet_res_unlock(0);
 814
 815                 rc = snprintf(buf, buf_len,
 816                               "{\n\tportals: all\n"
 817                               "\trotor: %s\n\tdescription: %s\n}",
 818                               portal_rotors[i].pr_name,
 819                               portal_rotors[i].pr_desc);
 820
 821                 if (pos >= min_t(int, rc, buf_len)) {
 822                         rc = 0;
 823                 } else {
 824                         rc = cfs_trace_copyout_string(buffer, nob,
 825                                         buf + pos, "\n");
 826                 }
 827                 goto out;
 828         }
 829
 830         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 831         if (rc < 0)
 832                 goto out;
 833
 834         tmp = cfs_trimwhite(buf);
 835
 836         rc = -EINVAL;
 837         lnet_res_lock(0);
 838         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 839                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 840                                 strlen(portal_rotors[i].pr_name)) == 0) {
 841                         portal_rotor = portal_rotors[i].pr_value;
 842                         rc = 0;
 843                         break;
 844                 }
 845         }
 846         lnet_res_unlock(0);
 847 out:
 848         LIBCFS_FREE(buf, buf_len);
 849         return rc;
 850 }
 851
 852 static int
 853 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 854                        size_t *lenp, loff_t *ppos)
 855 {
 856         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 857                                     __proc_lnet_portal_rotor);
 858 }
 859
 860
 861 static struct ctl_table lnet_table[] = {
 862         /*
 863          * NB No .strategy entries have been provided since sysctl(8) prefers
 864          * to go via /proc for portability.
 865          */
 866         {
 867                 INIT_CTL_NAME
 868                 .procname       = "stats",
 869                 .mode           = 0644,
 870                 .proc_handler   = &proc_lnet_stats,
 871         },
 872         {
 873                 INIT_CTL_NAME
 874                 .procname       = "routes",
 875                 .mode           = 0444,
 876                 .proc_handler   = &proc_lnet_routes,
 877         },
 878         {
 879                 INIT_CTL_NAME
 880                 .procname       = "routers",
 881                 .mode           = 0444,
 882                 .proc_handler   = &proc_lnet_routers,
 883         },
 884         {
 885                 INIT_CTL_NAME
 886                 .procname       = "peers",
 887                 .mode           = 0444,
 888                 .proc_handler   = &proc_lnet_peers,
 889         },
 890         {
 891                 INIT_CTL_NAME
 892                 .procname       = "buffers",
 893                 .mode           = 0444,
 894                 .proc_handler   = &proc_lnet_buffers,
 895         },
 896         {
 897                 INIT_CTL_NAME
 898                 .procname       = "nis",
 899                 .mode           = 0444,
 900                 .proc_handler   = &proc_lnet_nis,
 901         },
 902         {
 903                 INIT_CTL_NAME
 904                 .procname       = "portal_rotor",
 905                 .mode           = 0644,
 906                 .proc_handler   = &proc_lnet_portal_rotor,
 907         },
 908         { 0 }
 909 };
 910
 911 static struct ctl_table top_table[] = {
 912         {
 913                 INIT_CTL_NAME
 914                 .procname       = "lnet",
 915                 .mode           = 0555,
 916                 .data           = NULL,
 917                 .maxlen         = 0,
 918                 .child          = lnet_table,
 919         },
 920         { 0 }
 921 };
 922
 923 void
 924 lnet_proc_init(void)
 925 {
 926 #ifdef CONFIG_SYSCTL
 927         if (lnet_table_header == NULL)
 928                 lnet_table_header = register_sysctl_table(top_table);
 929 #endif
 930 }
 931
 932 void
 933 lnet_proc_fini(void)
 934 {
 935 #ifdef CONFIG_SYSCTL
 936         if (lnet_table_header != NULL)
 937                 unregister_sysctl_table(lnet_table_header);
 938
 939         lnet_table_header = NULL;
 940 #endif
 941 }