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 %7s %s\n",
 178                               "net", "hops", "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                         lnet_nid_t   nid   = route->lr_gateway->lp_nid;
 235                         int       alive = route->lr_gateway->lp_alive;
 236
 237                         s += snprintf(s, tmpstr + tmpsiz - s,
 238                                       "%-8s %4u %7s %s\n",
 239                                       libcfs_net2str(net), hops,
 240                                       alive ? "up" : "down",
 241                                       libcfs_nid2str(nid));
 242                         LASSERT(tmpstr + tmpsiz - s > 0);
 243                 }
 244
 245                 lnet_net_unlock(0);
 246         }
 247
 248         len = s - tmpstr;     /* how many bytes was written */
 249
 250         if (len > *lenp) {    /* linux-supplied buffer is too small */
 251                 rc = -EINVAL;
 252         } else if (len > 0) { /* wrote something */
 253                 if (copy_to_user(buffer, tmpstr, len))
 254                         rc = -EFAULT;
 255                 else {
 256                         off += 1;
 257                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 258                 }
 259         }
 260
 261         LIBCFS_FREE(tmpstr, tmpsiz);
 262
 263         if (rc == 0)
 264                 *lenp = len;
 265
 266         return rc;
 267 }
 268
 269 int LL_PROC_PROTO(proc_lnet_routers)
 270 {
 271         int     rc = 0;
 272         char      *tmpstr;
 273         char      *s;
 274         const int  tmpsiz = 256;
 275         int     len;
 276         int     ver;
 277         int     off;
 278
 279         DECLARE_LL_PROC_PPOS_DECL;
 280
 281         off = LNET_PROC_HOFF_GET(*ppos);
 282         ver = LNET_PROC_VER_GET(*ppos);
 283
 284         LASSERT(!write);
 285
 286         if (*lenp == 0)
 287                 return 0;
 288
 289         LIBCFS_ALLOC(tmpstr, tmpsiz);
 290         if (tmpstr == NULL)
 291                 return -ENOMEM;
 292
 293         s = tmpstr; /* points to current position in tmpstr[] */
 294
 295         if (*ppos == 0) {
 296                 s += snprintf(s, tmpstr + tmpsiz - s,
 297                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 298                               "ref", "rtr_ref", "alive_cnt", "state",
 299                               "last_ping", "ping_sent", "deadline",
 300                               "down_ni", "router");
 301                 LASSERT(tmpstr + tmpsiz - s > 0);
 302
 303                 lnet_net_lock(0);
 304                 ver = (unsigned int)the_lnet.ln_routers_version;
 305                 lnet_net_unlock(0);
 306                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 307         } else {
 308                 struct list_head                *r;
 309                 struct lnet_peer        *peer = NULL;
 310                 int                     skip = off - 1;
 311
 312                 lnet_net_lock(0);
 313
 314                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 315                         lnet_net_unlock(0);
 316
 317                         LIBCFS_FREE(tmpstr, tmpsiz);
 318                         return -ESTALE;
 319                 }
 320
 321                 r = the_lnet.ln_routers.next;
 322
 323                 while (r != &the_lnet.ln_routers) {
 324                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 325                                                          lp_rtr_list);
 326
 327                         if (skip == 0) {
 328                                 peer = lp;
 329                                 break;
 330                         }
 331
 332                         skip--;
 333                         r = r->next;
 334                 }
 335
 336                 if (peer != NULL) {
 337                         lnet_nid_t nid = peer->lp_nid;
 338                         cfs_time_t now = cfs_time_current();
 339                         cfs_time_t deadline = peer->lp_ping_deadline;
 340                         int nrefs     = peer->lp_refcount;
 341                         int nrtrrefs  = peer->lp_rtr_refcount;
 342                         int alive_cnt = peer->lp_alive_count;
 343                         int alive     = peer->lp_alive;
 344                         int pingsent  = !peer->lp_ping_notsent;
 345                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 346                                                      peer->lp_ping_timestamp));
 347                         int down_ni   = 0;
 348                         lnet_route_t *rtr;
 349
 350                         if ((peer->lp_ping_feats &
 351                              LNET_PING_FEAT_NI_STATUS) != 0) {
 352                                 list_for_each_entry(rtr, &peer->lp_routes,
 353                                                         lr_gwlist) {
 354                                         /* downis on any route should be the
 355                                          * number of downis on the gateway */
 356                                         if (rtr->lr_downis != 0) {
 357                                                 down_ni = rtr->lr_downis;
 358                                                 break;
 359                                         }
 360                                 }
 361                         }
 362
 363                         if (deadline == 0)
 364                                 s += snprintf(s, tmpstr + tmpsiz - s,
 365                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 366                                               nrefs, nrtrrefs, alive_cnt,
 367                                               alive ? "up" : "down", last_ping,
 368                                               pingsent, "NA", down_ni,
 369                                               libcfs_nid2str(nid));
 370                         else
 371                                 s += snprintf(s, tmpstr + tmpsiz - s,
 372                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 373                                               nrefs, nrtrrefs, alive_cnt,
 374                                               alive ? "up" : "down", last_ping,
 375                                               pingsent,
 376                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 377                                               down_ni, libcfs_nid2str(nid));
 378                         LASSERT(tmpstr + tmpsiz - s > 0);
 379                 }
 380
 381                 lnet_net_unlock(0);
 382         }
 383
 384         len = s - tmpstr;     /* how many bytes was written */
 385
 386         if (len > *lenp) {    /* linux-supplied buffer is too small */
 387                 rc = -EINVAL;
 388         } else if (len > 0) { /* wrote something */
 389                 if (copy_to_user(buffer, tmpstr, len))
 390                         rc = -EFAULT;
 391                 else {
 392                         off += 1;
 393                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 394                 }
 395         }
 396
 397         LIBCFS_FREE(tmpstr, tmpsiz);
 398
 399         if (rc == 0)
 400                 *lenp = len;
 401
 402         return rc;
 403 }
 404
 405 int LL_PROC_PROTO(proc_lnet_peers)
 406 {
 407         const int               tmpsiz  = 256;
 408         struct lnet_peer_table  *ptable;
 409         char                    *tmpstr;
 410         char                    *s;
 411         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 412         int                     ver  = LNET_PROC_VER_GET(*ppos);
 413         int                     hash = LNET_PROC_HASH_GET(*ppos);
 414         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 415         int                     rc = 0;
 416         int                     len;
 417
 418         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 419         LASSERT(!write);
 420
 421         if (*lenp == 0)
 422                 return 0;
 423
 424         if (cpt >= LNET_CPT_NUMBER) {
 425                 *lenp = 0;
 426                 return 0;
 427         }
 428
 429         LIBCFS_ALLOC(tmpstr, tmpsiz);
 430         if (tmpstr == NULL)
 431                 return -ENOMEM;
 432
 433         s = tmpstr; /* points to current position in tmpstr[] */
 434
 435         if (*ppos == 0) {
 436                 s += snprintf(s, tmpstr + tmpsiz - s,
 437                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 438                               "nid", "refs", "state", "last", "max",
 439                               "rtr", "min", "tx", "min", "queue");
 440                 LASSERT(tmpstr + tmpsiz - s > 0);
 441
 442                 hoff++;
 443         } else {
 444                 struct lnet_peer        *peer;
 445                 struct list_head                *p;
 446                 int                     skip;
 447  again:
 448                 p = NULL;
 449                 peer = NULL;
 450                 skip = hoff - 1;
 451
 452                 lnet_net_lock(cpt);
 453                 ptable = the_lnet.ln_peer_tables[cpt];
 454                 if (hoff == 1)
 455                         ver = LNET_PROC_VERSION(ptable->pt_version);
 456
 457                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 458                         lnet_net_unlock(cpt);
 459                         LIBCFS_FREE(tmpstr, tmpsiz);
 460                         return -ESTALE;
 461                 }
 462
 463                 while (hash < LNET_PEER_HASH_SIZE) {
 464                         if (p == NULL)
 465                                 p = ptable->pt_hash[hash].next;
 466
 467                         while (p != &ptable->pt_hash[hash]) {
 468                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 469                                                                  lp_hashlist);
 470                                 if (skip == 0) {
 471                                         peer = lp;
 472
 473                                         /* minor optimization: start from idx+1
 474                                          * on next iteration if we've just
 475                                          * drained lp_hashlist */
 476                                         if (lp->lp_hashlist.next ==
 477                                             &ptable->pt_hash[hash]) {
 478                                                 hoff = 1;
 479                                                 hash++;
 480                                         } else {
 481                                                 hoff++;
 482                                         }
 483
 484                                         break;
 485                                 }
 486
 487                                 skip--;
 488                                 p = lp->lp_hashlist.next;
 489                         }
 490
 491                         if (peer != NULL)
 492                                 break;
 493
 494                         p = NULL;
 495                         hoff = 1;
 496                         hash++;
 497                 }
 498
 499                 if (peer != NULL) {
 500                         lnet_nid_t nid       = peer->lp_nid;
 501                         int     nrefs     = peer->lp_refcount;
 502                         int     lastalive = -1;
 503                         char      *aliveness = "NA";
 504                         int     maxcr     = peer->lp_ni->ni_peertxcredits;
 505                         int     txcr      = peer->lp_txcredits;
 506                         int     mintxcr   = peer->lp_mintxcredits;
 507                         int     rtrcr     = peer->lp_rtrcredits;
 508                         int     minrtrcr  = peer->lp_minrtrcredits;
 509                         int     txqnob    = peer->lp_txqnob;
 510
 511                         if (lnet_isrouter(peer) ||
 512                             lnet_peer_aliveness_enabled(peer))
 513                                 aliveness = peer->lp_alive ? "up" : "down";
 514
 515                         if (lnet_peer_aliveness_enabled(peer)) {
 516                                 cfs_time_t     now = cfs_time_current();
 517                                 cfs_duration_t delta;
 518
 519                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 520                                 lastalive = cfs_duration_sec(delta);
 521
 522                                 /* No need to mess up peers contents with
 523                                  * arbitrarily long integers - it suffices to
 524                                  * know that lastalive is more than 10000s old
 525                                  */
 526                                 if (lastalive >= 10000)
 527                                         lastalive = 9999;
 528                         }
 529
 530                         lnet_net_unlock(cpt);
 531
 532                         s += snprintf(s, tmpstr + tmpsiz - s,
 533                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 534                                       libcfs_nid2str(nid), nrefs, aliveness,
 535                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 536                                       mintxcr, txqnob);
 537                         LASSERT(tmpstr + tmpsiz - s > 0);
 538
 539                 } else { /* peer is NULL */
 540                         lnet_net_unlock(cpt);
 541                 }
 542
 543                 if (hash == LNET_PEER_HASH_SIZE) {
 544                         cpt++;
 545                         hash = 0;
 546                         hoff = 1;
 547                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 548                                 goto again;
 549                 }
 550         }
 551
 552         len = s - tmpstr;     /* how many bytes was written */
 553
 554         if (len > *lenp) {    /* linux-supplied buffer is too small */
 555                 rc = -EINVAL;
 556         } else if (len > 0) { /* wrote something */
 557                 if (copy_to_user(buffer, tmpstr, len))
 558                         rc = -EFAULT;
 559                 else
 560                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 561         }
 562
 563         LIBCFS_FREE(tmpstr, tmpsiz);
 564
 565         if (rc == 0)
 566                 *lenp = len;
 567
 568         return rc;
 569 }
 570
 571 static int __proc_lnet_buffers(void *data, int write,
 572                                loff_t pos, void *buffer, int nob)
 573 {
 574         char        *s;
 575         char        *tmpstr;
 576         int             tmpsiz;
 577         int             idx;
 578         int             len;
 579         int             rc;
 580         int             i;
 581
 582         LASSERT(!write);
 583
 584         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 585         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 586         LIBCFS_ALLOC(tmpstr, tmpsiz);
 587         if (tmpstr == NULL)
 588                 return -ENOMEM;
 589
 590         s = tmpstr; /* points to current position in tmpstr[] */
 591
 592         s += snprintf(s, tmpstr + tmpsiz - s,
 593                       "%5s %5s %7s %7s\n",
 594                       "pages", "count", "credits", "min");
 595         LASSERT(tmpstr + tmpsiz - s > 0);
 596
 597         if (the_lnet.ln_rtrpools == NULL)
 598                 goto out; /* I'm not a router */
 599
 600         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 601                 lnet_rtrbufpool_t *rbp;
 602
 603                 lnet_net_lock(LNET_LOCK_EX);
 604                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 605                         s += snprintf(s, tmpstr + tmpsiz - s,
 606                                       "%5d %5d %7d %7d\n",
 607                                       rbp[idx].rbp_npages,
 608                                       rbp[idx].rbp_nbuffers,
 609                                       rbp[idx].rbp_credits,
 610                                       rbp[idx].rbp_mincredits);
 611                         LASSERT(tmpstr + tmpsiz - s > 0);
 612                 }
 613                 lnet_net_unlock(LNET_LOCK_EX);
 614         }
 615
 616  out:
 617         len = s - tmpstr;
 618
 619         if (pos >= min_t(int, len, strlen(tmpstr)))
 620                 rc = 0;
 621         else
 622                 rc = cfs_trace_copyout_string(buffer, nob,
 623                                               tmpstr + pos, NULL);
 624
 625         LIBCFS_FREE(tmpstr, tmpsiz);
 626         return rc;
 627 }
 628
 629 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 630
 631 int LL_PROC_PROTO(proc_lnet_nis)
 632 {
 633         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 634         int     rc = 0;
 635         char      *tmpstr;
 636         char      *s;
 637         int     len;
 638
 639         DECLARE_LL_PROC_PPOS_DECL;
 640
 641         LASSERT(!write);
 642
 643         if (*lenp == 0)
 644                 return 0;
 645
 646         LIBCFS_ALLOC(tmpstr, tmpsiz);
 647         if (tmpstr == NULL)
 648                 return -ENOMEM;
 649
 650         s = tmpstr; /* points to current position in tmpstr[] */
 651
 652         if (*ppos == 0) {
 653                 s += snprintf(s, tmpstr + tmpsiz - s,
 654                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 655                               "nid", "status", "alive", "refs", "peer",
 656                               "rtr", "max", "tx", "min");
 657                 LASSERT(tmpstr + tmpsiz - s > 0);
 658         } else {
 659                 struct list_head        *n;
 660                 lnet_ni_t        *ni   = NULL;
 661                 int             skip = *ppos - 1;
 662
 663                 lnet_net_lock(0);
 664
 665                 n = the_lnet.ln_nis.next;
 666
 667                 while (n != &the_lnet.ln_nis) {
 668                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 669
 670                         if (skip == 0) {
 671                                 ni = a_ni;
 672                                 break;
 673                         }
 674
 675                         skip--;
 676                         n = n->next;
 677                 }
 678
 679                 if (ni != NULL) {
 680                         struct lnet_tx_queue    *tq;
 681                         char    *stat;
 682                         long    now = cfs_time_current_sec();
 683                         int     last_alive = -1;
 684                         int     i;
 685                         int     j;
 686
 687                         if (the_lnet.ln_routing)
 688                                 last_alive = now - ni->ni_last_alive;
 689
 690                         /* @lo forever alive */
 691                         if (ni->ni_lnd->lnd_type == LOLND)
 692                                 last_alive = 0;
 693
 694                         lnet_ni_lock(ni);
 695                         LASSERT(ni->ni_status != NULL);
 696                         stat = (ni->ni_status->ns_status ==
 697                                 LNET_NI_STATUS_UP) ? "up" : "down";
 698                         lnet_ni_unlock(ni);
 699
 700                         /* we actually output credits information for
 701                          * TX queue of each partition */
 702                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 703                                 for (j = 0; ni->ni_cpts != NULL &&
 704                                      j < ni->ni_ncpts; j++) {
 705                                         if (i == ni->ni_cpts[j])
 706                                                 break;
 707                                 }
 708
 709                                 if (j == ni->ni_ncpts)
 710                                         continue;
 711
 712                                 if (i != 0)
 713                                         lnet_net_lock(i);
 714
 715                                 s += snprintf(s, tmpstr + tmpsiz - s,
 716                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 717                                       libcfs_nid2str(ni->ni_nid), stat,
 718                                       last_alive, *ni->ni_refs[i],
 719                                       ni->ni_peertxcredits,
 720                                       ni->ni_peerrtrcredits,
 721                                       tq->tq_credits_max,
 722                                       tq->tq_credits, tq->tq_credits_min);
 723                                 if (i != 0)
 724                                         lnet_net_unlock(i);
 725                         }
 726                         LASSERT(tmpstr + tmpsiz - s > 0);
 727                 }
 728
 729                 lnet_net_unlock(0);
 730         }
 731
 732         len = s - tmpstr;     /* how many bytes was written */
 733
 734         if (len > *lenp) {    /* linux-supplied buffer is too small */
 735                 rc = -EINVAL;
 736         } else if (len > 0) { /* wrote something */
 737                 if (copy_to_user(buffer, tmpstr, len))
 738                         rc = -EFAULT;
 739                 else
 740                         *ppos += 1;
 741         }
 742
 743         LIBCFS_FREE(tmpstr, tmpsiz);
 744
 745         if (rc == 0)
 746                 *lenp = len;
 747
 748         return rc;
 749 }
 750
 751 struct lnet_portal_rotors {
 752         int          pr_value;
 753         const char      *pr_name;
 754         const char      *pr_desc;
 755 };
 756
 757 static struct lnet_portal_rotors        portal_rotors[] = {
 758         {
 759                 .pr_value = LNET_PTL_ROTOR_OFF,
 760                 .pr_name  = "OFF",
 761                 .pr_desc  = "Turn off message rotor for wildcard portals"
 762         },
 763         {
 764                 .pr_value = LNET_PTL_ROTOR_ON,
 765                 .pr_name  = "ON",
 766                 .pr_desc  = "round-robin dispatch all PUT messages for "
 767                             "wildcard portals"
 768         },
 769         {
 770                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 771                 .pr_name  = "RR_RT",
 772                 .pr_desc  = "round-robin dispatch routed PUT message for "
 773                             "wildcard portals"
 774         },
 775         {
 776                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 777                 .pr_name  = "HASH_RT",
 778                 .pr_desc  = "dispatch routed PUT message by hashing source "
 779                             "NID for wildcard portals"
 780         },
 781         {
 782                 .pr_value = -1,
 783                 .pr_name  = NULL,
 784                 .pr_desc  = NULL
 785         },
 786 };
 787
 788 extern int portal_rotor;
 789
 790 static int __proc_lnet_portal_rotor(void *data, int write,
 791                                     loff_t pos, void *buffer, int nob)
 792 {
 793         const int       buf_len = 128;
 794         char            *buf;
 795         char            *tmp;
 796         int             rc;
 797         int             i;
 798
 799         LIBCFS_ALLOC(buf, buf_len);
 800         if (buf == NULL)
 801                 return -ENOMEM;
 802
 803         if (!write) {
 804                 lnet_res_lock(0);
 805
 806                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 807                         if (portal_rotors[i].pr_value == portal_rotor)
 808                                 break;
 809                 }
 810
 811                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 812                 lnet_res_unlock(0);
 813
 814                 rc = snprintf(buf, buf_len,
 815                               "{\n\tportals: all\n"
 816                               "\trotor: %s\n\tdescription: %s\n}",
 817                               portal_rotors[i].pr_name,
 818                               portal_rotors[i].pr_desc);
 819
 820                 if (pos >= min_t(int, rc, buf_len)) {
 821                         rc = 0;
 822                 } else {
 823                         rc = cfs_trace_copyout_string(buffer, nob,
 824                                         buf + pos, "\n");
 825                 }
 826                 goto out;
 827         }
 828
 829         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 830         if (rc < 0)
 831                 goto out;
 832
 833         tmp = cfs_trimwhite(buf);
 834
 835         rc = -EINVAL;
 836         lnet_res_lock(0);
 837         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 838                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 839                                     strlen(portal_rotors[i].pr_name)) == 0) {
 840                         portal_rotor = portal_rotors[i].pr_value;
 841                         rc = 0;
 842                         break;
 843                 }
 844         }
 845         lnet_res_unlock(0);
 846 out:
 847         LIBCFS_FREE(buf, buf_len);
 848         return rc;
 849 }
 850 DECLARE_PROC_HANDLER(proc_lnet_portal_rotor);
 851
 852 static ctl_table_t lnet_table[] = {
 853         /*
 854          * NB No .strategy entries have been provided since sysctl(8) prefers
 855          * to go via /proc for portability.
 856          */
 857         {
 858                 INIT_CTL_NAME(PSDEV_LNET_STATS)
 859                 .procname = "stats",
 860                 .mode     = 0644,
 861                 .proc_handler = &proc_lnet_stats,
 862         },
 863         {
 864                 INIT_CTL_NAME(PSDEV_LNET_ROUTES)
 865                 .procname = "routes",
 866                 .mode     = 0444,
 867                 .proc_handler = &proc_lnet_routes,
 868         },
 869         {
 870                 INIT_CTL_NAME(PSDEV_LNET_ROUTERS)
 871                 .procname = "routers",
 872                 .mode     = 0444,
 873                 .proc_handler = &proc_lnet_routers,
 874         },
 875         {
 876                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 877                 .procname = "peers",
 878                 .mode     = 0444,
 879                 .proc_handler = &proc_lnet_peers,
 880         },
 881         {
 882                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 883                 .procname = "buffers",
 884                 .mode     = 0444,
 885                 .proc_handler = &proc_lnet_buffers,
 886         },
 887         {
 888                 INIT_CTL_NAME(PSDEV_LNET_NIS)
 889                 .procname = "nis",
 890                 .mode     = 0444,
 891                 .proc_handler = &proc_lnet_nis,
 892         },
 893         {
 894                 INIT_CTL_NAME(PSDEV_LNET_PTL_ROTOR)
 895                 .procname = "portal_rotor",
 896                 .mode     = 0644,
 897                 .proc_handler = &proc_lnet_portal_rotor,
 898         },
 899         {
 900                 INIT_CTL_NAME(0)
 901         }
 902 };
 903
 904 static ctl_table_t top_table[] = {
 905         {
 906                 INIT_CTL_NAME(CTL_LNET)
 907                 .procname = "lnet",
 908                 .mode     = 0555,
 909                 .data     = NULL,
 910                 .maxlen   = 0,
 911                 .child    = lnet_table,
 912         },
 913         {
 914                 INIT_CTL_NAME(0)
 915         }
 916 };
 917
 918 void
 919 lnet_proc_init(void)
 920 {
 921 #ifdef CONFIG_SYSCTL
 922         if (lnet_table_header == NULL)
 923                 lnet_table_header = register_sysctl_table(top_table);
 924 #endif
 925 }
 926
 927 void
 928 lnet_proc_fini(void)
 929 {
 930 #ifdef CONFIG_SYSCTL
 931         if (lnet_table_header != NULL)
 932                 unregister_sysctl_table(lnet_table_header);
 933
 934         lnet_table_header = NULL;
 935 #endif
 936 }
 937
 938 #else
 939
 940 void
 941 lnet_proc_init(void)
 942 {
 943 }
 944
 945 void
 946 lnet_proc_fini(void)
 947 {
 948 }
 949
 950 #endif