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  *   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 <linux/libcfs/libcfs.h>
  26 #include <linux/lnet/lib-lnet.h>
  27
  28 #if  defined(LNET_ROUTER)
  29
  30 /* This is really lnet_proc.c. You might need to update sanity test 215
  31  * if any file format is changed. */
  32
  33 static ctl_table_header_t *lnet_table_header;
  34
  35 #define CTL_LNET         (0x100)
  36 enum {
  37         PSDEV_LNET_STATS = 100,
  38         PSDEV_LNET_ROUTES,
  39         PSDEV_LNET_ROUTERS,
  40         PSDEV_LNET_PEERS,
  41         PSDEV_LNET_BUFFERS,
  42         PSDEV_LNET_NIS,
  43         PSDEV_LNET_PTL_ROTOR,
  44 };
  45
  46 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  47 /*
  48  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  49  */
  50 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  51 /* change version, 16 bits or 8 bits */
  52 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  53
  54 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  55 /*
  56  * bits for peer hash offset
  57  * NB: we don't use the highest bit of *ppos because it's signed
  58  */
  59 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  60                                  LNET_PROC_CPT_BITS -    \
  61                                  LNET_PROC_VER_BITS -    \
  62                                  LNET_PROC_HASH_BITS - 1)
  63 /* bits for hash index + position */
  64 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  65 /* bits for peer hash table + hash version */
  66 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  67
  68 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  69 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  70 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  71 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  72
  73 #define LNET_PROC_CPT_GET(pos)                          \
  74         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  75
  76 #define LNET_PROC_VER_GET(pos)                          \
  77         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  78
  79 #define LNET_PROC_HASH_GET(pos)                         \
  80         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  81
  82 #define LNET_PROC_HOFF_GET(pos)                         \
  83         (int)((pos) & LNET_PROC_HOFF_MASK)
  84
  85 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  86         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  87         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  88         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  89         ((off) & LNET_PROC_HOFF_MASK))
  90
  91 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  92
  93 static int __proc_lnet_stats(void *data, int write,
  94                              loff_t pos, void *buffer, int nob)
  95 {
  96         int           rc;
  97         lnet_counters_t *ctrs;
  98         int           len;
  99         char        *tmpstr;
 100         const int       tmpsiz = 256; /* 7 %u and 4 LPU64 */
 101
 102         if (write) {
 103                 lnet_counters_reset();
 104                 return 0;
 105         }
 106
 107         /* read */
 108
 109         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
 110         if (ctrs == NULL)
 111                 return -ENOMEM;
 112
 113         LIBCFS_ALLOC(tmpstr, tmpsiz);
 114         if (tmpstr == NULL) {
 115                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 116                 return -ENOMEM;
 117         }
 118
 119         lnet_counters_get(ctrs);
 120
 121         len = snprintf(tmpstr, tmpsiz,
 122                        "%u %u %u %u %u %u %u "LPU64" "LPU64" "
 123                        LPU64" "LPU64,
 124                        ctrs->msgs_alloc, ctrs->msgs_max,
 125                        ctrs->errors,
 126                        ctrs->send_count, ctrs->recv_count,
 127                        ctrs->route_count, ctrs->drop_count,
 128                        ctrs->send_length, ctrs->recv_length,
 129                        ctrs->route_length, ctrs->drop_length);
 130
 131         if (pos >= min_t(int, len, strlen(tmpstr)))
 132                 rc = 0;
 133         else
 134                 rc = cfs_trace_copyout_string(buffer, nob,
 135                                               tmpstr + pos, "\n");
 136
 137         LIBCFS_FREE(tmpstr, tmpsiz);
 138         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 139         return rc;
 140 }
 141
 142 DECLARE_PROC_HANDLER(proc_lnet_stats);
 143
 144 int LL_PROC_PROTO(proc_lnet_routes)
 145 {
 146         const int       tmpsiz = 256;
 147         char            *tmpstr;
 148         char            *s;
 149         int             rc = 0;
 150         int             len;
 151         int             ver;
 152         int             off;
 153
 154         DECLARE_LL_PROC_PPOS_DECL;
 155
 156         CLASSERT(sizeof(loff_t) >= 4);
 157
 158         off = LNET_PROC_HOFF_GET(*ppos);
 159         ver = LNET_PROC_VER_GET(*ppos);
 160
 161         LASSERT(!write);
 162
 163         if (*lenp == 0)
 164                 return 0;
 165
 166         LIBCFS_ALLOC(tmpstr, tmpsiz);
 167         if (tmpstr == NULL)
 168                 return -ENOMEM;
 169
 170         s = tmpstr; /* points to current position in tmpstr[] */
 171
 172         if (*ppos == 0) {
 173                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 174                               the_lnet.ln_routing ? "enabled" : "disabled");
 175                 LASSERT(tmpstr + tmpsiz - s > 0);
 176
 177                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 178                               "net", "hops", "priority", "state", "router");
 179                 LASSERT(tmpstr + tmpsiz - s > 0);
 180
 181                 lnet_net_lock(0);
 182                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 183                 lnet_net_unlock(0);
 184                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 185         } else {
 186                 struct list_head                *n;
 187                 struct list_head                *r;
 188                 lnet_route_t            *route = NULL;
 189                 lnet_remotenet_t        *rnet  = NULL;
 190                 int                     skip  = off - 1;
 191                 struct list_head                *rn_list;
 192                 int                     i;
 193
 194                 lnet_net_lock(0);
 195
 196                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 197                         lnet_net_unlock(0);
 198                         LIBCFS_FREE(tmpstr, tmpsiz);
 199                         return -ESTALE;
 200                 }
 201
 202                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 203                      i++) {
 204                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 205
 206                         n = rn_list->next;
 207
 208                         while (n != rn_list && route == NULL) {
 209                                 rnet = list_entry(n, lnet_remotenet_t,
 210                                                       lrn_list);
 211
 212                                 r = rnet->lrn_routes.next;
 213
 214                                 while (r != &rnet->lrn_routes) {
 215                                         lnet_route_t *re =
 216                                                 list_entry(r, lnet_route_t,
 217                                                                lr_list);
 218                                         if (skip == 0) {
 219                                                 route = re;
 220                                                 break;
 221                                         }
 222
 223                                         skip--;
 224                                         r = r->next;
 225                                 }
 226
 227                                 n = n->next;
 228                         }
 229                 }
 230
 231                 if (route != NULL) {
 232                         __u32        net        = rnet->lrn_net;
 233                         unsigned int hops       = route->lr_hops;
 234                         unsigned int priority   = route->lr_priority;
 235                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 236                         int          alive      = route->lr_gateway->lp_alive;
 237
 238                         s += snprintf(s, tmpstr + tmpsiz - s,
 239                                       "%-8s %4u %8u %7s %s\n",
 240                                       libcfs_net2str(net), hops,
 241                                       priority,
 242                                       alive ? "up" : "down",
 243                                       libcfs_nid2str(nid));
 244                         LASSERT(tmpstr + tmpsiz - s > 0);
 245                 }
 246
 247                 lnet_net_unlock(0);
 248         }
 249
 250         len = s - tmpstr;     /* how many bytes was written */
 251
 252         if (len > *lenp) {    /* linux-supplied buffer is too small */
 253                 rc = -EINVAL;
 254         } else if (len > 0) { /* wrote something */
 255                 if (copy_to_user(buffer, tmpstr, len))
 256                         rc = -EFAULT;
 257                 else {
 258                         off += 1;
 259                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 260                 }
 261         }
 262
 263         LIBCFS_FREE(tmpstr, tmpsiz);
 264
 265         if (rc == 0)
 266                 *lenp = len;
 267
 268         return rc;
 269 }
 270
 271 int LL_PROC_PROTO(proc_lnet_routers)
 272 {
 273         int     rc = 0;
 274         char      *tmpstr;
 275         char      *s;
 276         const int  tmpsiz = 256;
 277         int     len;
 278         int     ver;
 279         int     off;
 280
 281         DECLARE_LL_PROC_PPOS_DECL;
 282
 283         off = LNET_PROC_HOFF_GET(*ppos);
 284         ver = LNET_PROC_VER_GET(*ppos);
 285
 286         LASSERT(!write);
 287
 288         if (*lenp == 0)
 289                 return 0;
 290
 291         LIBCFS_ALLOC(tmpstr, tmpsiz);
 292         if (tmpstr == NULL)
 293                 return -ENOMEM;
 294
 295         s = tmpstr; /* points to current position in tmpstr[] */
 296
 297         if (*ppos == 0) {
 298                 s += snprintf(s, tmpstr + tmpsiz - s,
 299                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 300                               "ref", "rtr_ref", "alive_cnt", "state",
 301                               "last_ping", "ping_sent", "deadline",
 302                               "down_ni", "router");
 303                 LASSERT(tmpstr + tmpsiz - s > 0);
 304
 305                 lnet_net_lock(0);
 306                 ver = (unsigned int)the_lnet.ln_routers_version;
 307                 lnet_net_unlock(0);
 308                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 309         } else {
 310                 struct list_head                *r;
 311                 struct lnet_peer        *peer = NULL;
 312                 int                     skip = off - 1;
 313
 314                 lnet_net_lock(0);
 315
 316                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 317                         lnet_net_unlock(0);
 318
 319                         LIBCFS_FREE(tmpstr, tmpsiz);
 320                         return -ESTALE;
 321                 }
 322
 323                 r = the_lnet.ln_routers.next;
 324
 325                 while (r != &the_lnet.ln_routers) {
 326                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 327                                                          lp_rtr_list);
 328
 329                         if (skip == 0) {
 330                                 peer = lp;
 331                                 break;
 332                         }
 333
 334                         skip--;
 335                         r = r->next;
 336                 }
 337
 338                 if (peer != NULL) {
 339                         lnet_nid_t nid = peer->lp_nid;
 340                         cfs_time_t now = cfs_time_current();
 341                         cfs_time_t deadline = peer->lp_ping_deadline;
 342                         int nrefs     = peer->lp_refcount;
 343                         int nrtrrefs  = peer->lp_rtr_refcount;
 344                         int alive_cnt = peer->lp_alive_count;
 345                         int alive     = peer->lp_alive;
 346                         int pingsent  = !peer->lp_ping_notsent;
 347                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 348                                                      peer->lp_ping_timestamp));
 349                         int down_ni   = 0;
 350                         lnet_route_t *rtr;
 351
 352                         if ((peer->lp_ping_feats &
 353                              LNET_PING_FEAT_NI_STATUS) != 0) {
 354                                 list_for_each_entry(rtr, &peer->lp_routes,
 355                                                         lr_gwlist) {
 356                                         /* downis on any route should be the
 357                                          * number of downis on the gateway */
 358                                         if (rtr->lr_downis != 0) {
 359                                                 down_ni = rtr->lr_downis;
 360                                                 break;
 361                                         }
 362                                 }
 363                         }
 364
 365                         if (deadline == 0)
 366                                 s += snprintf(s, tmpstr + tmpsiz - s,
 367                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 368                                               nrefs, nrtrrefs, alive_cnt,
 369                                               alive ? "up" : "down", last_ping,
 370                                               pingsent, "NA", down_ni,
 371                                               libcfs_nid2str(nid));
 372                         else
 373                                 s += snprintf(s, tmpstr + tmpsiz - s,
 374                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 375                                               nrefs, nrtrrefs, alive_cnt,
 376                                               alive ? "up" : "down", last_ping,
 377                                               pingsent,
 378                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 379                                               down_ni, libcfs_nid2str(nid));
 380                         LASSERT(tmpstr + tmpsiz - s > 0);
 381                 }
 382
 383                 lnet_net_unlock(0);
 384         }
 385
 386         len = s - tmpstr;     /* how many bytes was written */
 387
 388         if (len > *lenp) {    /* linux-supplied buffer is too small */
 389                 rc = -EINVAL;
 390         } else if (len > 0) { /* wrote something */
 391                 if (copy_to_user(buffer, tmpstr, len))
 392                         rc = -EFAULT;
 393                 else {
 394                         off += 1;
 395                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 396                 }
 397         }
 398
 399         LIBCFS_FREE(tmpstr, tmpsiz);
 400
 401         if (rc == 0)
 402                 *lenp = len;
 403
 404         return rc;
 405 }
 406
 407 int LL_PROC_PROTO(proc_lnet_peers)
 408 {
 409         const int               tmpsiz  = 256;
 410         struct lnet_peer_table  *ptable;
 411         char                    *tmpstr;
 412         char                    *s;
 413         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 414         int                     ver  = LNET_PROC_VER_GET(*ppos);
 415         int                     hash = LNET_PROC_HASH_GET(*ppos);
 416         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 417         int                     rc = 0;
 418         int                     len;
 419
 420         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 421         LASSERT(!write);
 422
 423         if (*lenp == 0)
 424                 return 0;
 425
 426         if (cpt >= LNET_CPT_NUMBER) {
 427                 *lenp = 0;
 428                 return 0;
 429         }
 430
 431         LIBCFS_ALLOC(tmpstr, tmpsiz);
 432         if (tmpstr == NULL)
 433                 return -ENOMEM;
 434
 435         s = tmpstr; /* points to current position in tmpstr[] */
 436
 437         if (*ppos == 0) {
 438                 s += snprintf(s, tmpstr + tmpsiz - s,
 439                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 440                               "nid", "refs", "state", "last", "max",
 441                               "rtr", "min", "tx", "min", "queue");
 442                 LASSERT(tmpstr + tmpsiz - s > 0);
 443
 444                 hoff++;
 445         } else {
 446                 struct lnet_peer        *peer;
 447                 struct list_head                *p;
 448                 int                     skip;
 449  again:
 450                 p = NULL;
 451                 peer = NULL;
 452                 skip = hoff - 1;
 453
 454                 lnet_net_lock(cpt);
 455                 ptable = the_lnet.ln_peer_tables[cpt];
 456                 if (hoff == 1)
 457                         ver = LNET_PROC_VERSION(ptable->pt_version);
 458
 459                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 460                         lnet_net_unlock(cpt);
 461                         LIBCFS_FREE(tmpstr, tmpsiz);
 462                         return -ESTALE;
 463                 }
 464
 465                 while (hash < LNET_PEER_HASH_SIZE) {
 466                         if (p == NULL)
 467                                 p = ptable->pt_hash[hash].next;
 468
 469                         while (p != &ptable->pt_hash[hash]) {
 470                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 471                                                                  lp_hashlist);
 472                                 if (skip == 0) {
 473                                         peer = lp;
 474
 475                                         /* minor optimization: start from idx+1
 476                                          * on next iteration if we've just
 477                                          * drained lp_hashlist */
 478                                         if (lp->lp_hashlist.next ==
 479                                             &ptable->pt_hash[hash]) {
 480                                                 hoff = 1;
 481                                                 hash++;
 482                                         } else {
 483                                                 hoff++;
 484                                         }
 485
 486                                         break;
 487                                 }
 488
 489                                 skip--;
 490                                 p = lp->lp_hashlist.next;
 491                         }
 492
 493                         if (peer != NULL)
 494                                 break;
 495
 496                         p = NULL;
 497                         hoff = 1;
 498                         hash++;
 499                 }
 500
 501                 if (peer != NULL) {
 502                         lnet_nid_t nid       = peer->lp_nid;
 503                         int     nrefs     = peer->lp_refcount;
 504                         int     lastalive = -1;
 505                         char      *aliveness = "NA";
 506                         int     maxcr     = peer->lp_ni->ni_peertxcredits;
 507                         int     txcr      = peer->lp_txcredits;
 508                         int     mintxcr   = peer->lp_mintxcredits;
 509                         int     rtrcr     = peer->lp_rtrcredits;
 510                         int     minrtrcr  = peer->lp_minrtrcredits;
 511                         int     txqnob    = peer->lp_txqnob;
 512
 513                         if (lnet_isrouter(peer) ||
 514                             lnet_peer_aliveness_enabled(peer))
 515                                 aliveness = peer->lp_alive ? "up" : "down";
 516
 517                         if (lnet_peer_aliveness_enabled(peer)) {
 518                                 cfs_time_t     now = cfs_time_current();
 519                                 cfs_duration_t delta;
 520
 521                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 522                                 lastalive = cfs_duration_sec(delta);
 523
 524                                 /* No need to mess up peers contents with
 525                                  * arbitrarily long integers - it suffices to
 526                                  * know that lastalive is more than 10000s old
 527                                  */
 528                                 if (lastalive >= 10000)
 529                                         lastalive = 9999;
 530                         }
 531
 532                         lnet_net_unlock(cpt);
 533
 534                         s += snprintf(s, tmpstr + tmpsiz - s,
 535                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 536                                       libcfs_nid2str(nid), nrefs, aliveness,
 537                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 538                                       mintxcr, txqnob);
 539                         LASSERT(tmpstr + tmpsiz - s > 0);
 540
 541                 } else { /* peer is NULL */
 542                         lnet_net_unlock(cpt);
 543                 }
 544
 545                 if (hash == LNET_PEER_HASH_SIZE) {
 546                         cpt++;
 547                         hash = 0;
 548                         hoff = 1;
 549                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 550                                 goto again;
 551                 }
 552         }
 553
 554         len = s - tmpstr;     /* how many bytes was written */
 555
 556         if (len > *lenp) {    /* linux-supplied buffer is too small */
 557                 rc = -EINVAL;
 558         } else if (len > 0) { /* wrote something */
 559                 if (copy_to_user(buffer, tmpstr, len))
 560                         rc = -EFAULT;
 561                 else
 562                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 563         }
 564
 565         LIBCFS_FREE(tmpstr, tmpsiz);
 566
 567         if (rc == 0)
 568                 *lenp = len;
 569
 570         return rc;
 571 }
 572
 573 static int __proc_lnet_buffers(void *data, int write,
 574                                loff_t pos, void *buffer, int nob)
 575 {
 576         char        *s;
 577         char        *tmpstr;
 578         int             tmpsiz;
 579         int             idx;
 580         int             len;
 581         int             rc;
 582         int             i;
 583
 584         LASSERT(!write);
 585
 586         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 587         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 588         LIBCFS_ALLOC(tmpstr, tmpsiz);
 589         if (tmpstr == NULL)
 590                 return -ENOMEM;
 591
 592         s = tmpstr; /* points to current position in tmpstr[] */
 593
 594         s += snprintf(s, tmpstr + tmpsiz - s,
 595                       "%5s %5s %7s %7s\n",
 596                       "pages", "count", "credits", "min");
 597         LASSERT(tmpstr + tmpsiz - s > 0);
 598
 599         if (the_lnet.ln_rtrpools == NULL)
 600                 goto out; /* I'm not a router */
 601
 602         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 603                 lnet_rtrbufpool_t *rbp;
 604
 605                 lnet_net_lock(LNET_LOCK_EX);
 606                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 607                         s += snprintf(s, tmpstr + tmpsiz - s,
 608                                       "%5d %5d %7d %7d\n",
 609                                       rbp[idx].rbp_npages,
 610                                       rbp[idx].rbp_nbuffers,
 611                                       rbp[idx].rbp_credits,
 612                                       rbp[idx].rbp_mincredits);
 613                         LASSERT(tmpstr + tmpsiz - s > 0);
 614                 }
 615                 lnet_net_unlock(LNET_LOCK_EX);
 616         }
 617
 618  out:
 619         len = s - tmpstr;
 620
 621         if (pos >= min_t(int, len, strlen(tmpstr)))
 622                 rc = 0;
 623         else
 624                 rc = cfs_trace_copyout_string(buffer, nob,
 625                                               tmpstr + pos, NULL);
 626
 627         LIBCFS_FREE(tmpstr, tmpsiz);
 628         return rc;
 629 }
 630
 631 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 632
 633 int LL_PROC_PROTO(proc_lnet_nis)
 634 {
 635         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 636         int     rc = 0;
 637         char      *tmpstr;
 638         char      *s;
 639         int     len;
 640
 641         DECLARE_LL_PROC_PPOS_DECL;
 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                 struct list_head        *n;
 662                 lnet_ni_t        *ni   = NULL;
 663                 int             skip = *ppos - 1;
 664
 665                 lnet_net_lock(0);
 666
 667                 n = the_lnet.ln_nis.next;
 668
 669                 while (n != &the_lnet.ln_nis) {
 670                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 671
 672                         if (skip == 0) {
 673                                 ni = a_ni;
 674                                 break;
 675                         }
 676
 677                         skip--;
 678                         n = n->next;
 679                 }
 680
 681                 if (ni != NULL) {
 682                         struct lnet_tx_queue    *tq;
 683                         char    *stat;
 684                         long    now = cfs_time_current_sec();
 685                         int     last_alive = -1;
 686                         int     i;
 687                         int     j;
 688
 689                         if (the_lnet.ln_routing)
 690                                 last_alive = now - ni->ni_last_alive;
 691
 692                         /* @lo forever alive */
 693                         if (ni->ni_lnd->lnd_type == LOLND)
 694                                 last_alive = 0;
 695
 696                         lnet_ni_lock(ni);
 697                         LASSERT(ni->ni_status != NULL);
 698                         stat = (ni->ni_status->ns_status ==
 699                                 LNET_NI_STATUS_UP) ? "up" : "down";
 700                         lnet_ni_unlock(ni);
 701
 702                         /* we actually output credits information for
 703                          * TX queue of each partition */
 704                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 705                                 for (j = 0; ni->ni_cpts != NULL &&
 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 != 0)
 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, tq->tq_credits_min);
 725                                 if (i != 0)
 726                                         lnet_net_unlock(i);
 727                         }
 728                         LASSERT(tmpstr + tmpsiz - s > 0);
 729                 }
 730
 731                 lnet_net_unlock(0);
 732         }
 733
 734         len = s - tmpstr;     /* how many bytes was written */
 735
 736         if (len > *lenp) {    /* linux-supplied buffer is too small */
 737                 rc = -EINVAL;
 738         } else if (len > 0) { /* wrote something */
 739                 if (copy_to_user(buffer, tmpstr, len))
 740                         rc = -EFAULT;
 741                 else
 742                         *ppos += 1;
 743         }
 744
 745         LIBCFS_FREE(tmpstr, tmpsiz);
 746
 747         if (rc == 0)
 748                 *lenp = len;
 749
 750         return rc;
 751 }
 752
 753 struct lnet_portal_rotors {
 754         int          pr_value;
 755         const char      *pr_name;
 756         const char      *pr_desc;
 757 };
 758
 759 static struct lnet_portal_rotors        portal_rotors[] = {
 760         {
 761                 .pr_value = LNET_PTL_ROTOR_OFF,
 762                 .pr_name  = "OFF",
 763                 .pr_desc  = "Turn off message rotor for wildcard portals"
 764         },
 765         {
 766                 .pr_value = LNET_PTL_ROTOR_ON,
 767                 .pr_name  = "ON",
 768                 .pr_desc  = "round-robin dispatch all PUT messages for "
 769                             "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 "
 775                             "wildcard portals"
 776         },
 777         {
 778                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 779                 .pr_name  = "HASH_RT",
 780                 .pr_desc  = "dispatch routed PUT message by hashing source "
 781                             "NID for wildcard portals"
 782         },
 783         {
 784                 .pr_value = -1,
 785                 .pr_name  = NULL,
 786                 .pr_desc  = NULL
 787         },
 788 };
 789
 790 extern int portal_rotor;
 791
 792 static int __proc_lnet_portal_rotor(void *data, int write,
 793                                     loff_t pos, void *buffer, int nob)
 794 {
 795         const int       buf_len = 128;
 796         char            *buf;
 797         char            *tmp;
 798         int             rc;
 799         int             i;
 800
 801         LIBCFS_ALLOC(buf, buf_len);
 802         if (buf == NULL)
 803                 return -ENOMEM;
 804
 805         if (!write) {
 806                 lnet_res_lock(0);
 807
 808                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 809                         if (portal_rotors[i].pr_value == portal_rotor)
 810                                 break;
 811                 }
 812
 813                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 814                 lnet_res_unlock(0);
 815
 816                 rc = snprintf(buf, buf_len,
 817                               "{\n\tportals: all\n"
 818                               "\trotor: %s\n\tdescription: %s\n}",
 819                               portal_rotors[i].pr_name,
 820                               portal_rotors[i].pr_desc);
 821
 822                 if (pos >= min_t(int, rc, buf_len)) {
 823                         rc = 0;
 824                 } else {
 825                         rc = cfs_trace_copyout_string(buffer, nob,
 826                                         buf + pos, "\n");
 827                 }
 828                 goto out;
 829         }
 830
 831         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 832         if (rc < 0)
 833                 goto out;
 834
 835         tmp = cfs_trimwhite(buf);
 836
 837         rc = -EINVAL;
 838         lnet_res_lock(0);
 839         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 840                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 841                                     strlen(portal_rotors[i].pr_name)) == 0) {
 842                         portal_rotor = portal_rotors[i].pr_value;
 843                         rc = 0;
 844                         break;
 845                 }
 846         }
 847         lnet_res_unlock(0);
 848 out:
 849         LIBCFS_FREE(buf, buf_len);
 850         return rc;
 851 }
 852 DECLARE_PROC_HANDLER(proc_lnet_portal_rotor);
 853
 854 static ctl_table_t lnet_table[] = {
 855         /*
 856          * NB No .strategy entries have been provided since sysctl(8) prefers
 857          * to go via /proc for portability.
 858          */
 859         {
 860                 .procname = "stats",
 861                 .mode     = 0644,
 862                 .proc_handler = &proc_lnet_stats,
 863         },
 864         {
 865                 .procname = "routes",
 866                 .mode     = 0444,
 867                 .proc_handler = &proc_lnet_routes,
 868         },
 869         {
 870                 .procname = "routers",
 871                 .mode     = 0444,
 872                 .proc_handler = &proc_lnet_routers,
 873         },
 874         {
 875                 .procname = "peers",
 876                 .mode     = 0444,
 877                 .proc_handler = &proc_lnet_peers,
 878         },
 879         {
 880                 .procname = "buffers",
 881                 .mode     = 0444,
 882                 .proc_handler = &proc_lnet_buffers,
 883         },
 884         {
 885                 .procname = "nis",
 886                 .mode     = 0444,
 887                 .proc_handler = &proc_lnet_nis,
 888         },
 889         {
 890                 .procname = "portal_rotor",
 891                 .mode     = 0644,
 892                 .proc_handler = &proc_lnet_portal_rotor,
 893         },
 894         {
 895         }
 896 };
 897
 898 static ctl_table_t top_table[] = {
 899         {
 900                 .procname = "lnet",
 901                 .mode     = 0555,
 902                 .data     = NULL,
 903                 .maxlen   = 0,
 904                 .child    = lnet_table,
 905         },
 906         {
 907         }
 908 };
 909
 910 void
 911 lnet_proc_init(void)
 912 {
 913         if (lnet_table_header == NULL)
 914                 lnet_table_header = register_sysctl_table(top_table);
 915 }
 916
 917 void
 918 lnet_proc_fini(void)
 919 {
 920         if (lnet_table_header != NULL)
 921                 unregister_sysctl_table(lnet_table_header);
 922
 923         lnet_table_header = NULL;
 924 }
 925
 926 #else
 927
 928 void
 929 lnet_proc_init(void)
 930 {
 931 }
 932
 933 void
 934 lnet_proc_fini(void)
 935 {
 936 }
 937
 938 #endif