lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, Whamcloud, Inc.
   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 #if defined(__KERNEL__) && 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 cfs_sysctl_table_header_t *lnet_table_header = NULL;
  34
  35 #ifndef HAVE_SYSCTL_UNNUMBERED
  36 #define CTL_LNET         (0x100)
  37 enum {
  38         PSDEV_LNET_STATS = 100,
  39         PSDEV_LNET_ROUTES,
  40         PSDEV_LNET_ROUTERS,
  41         PSDEV_LNET_PEERS,
  42         PSDEV_LNET_BUFFERS,
  43         PSDEV_LNET_NIS,
  44         PSDEV_LNET_PTL_ROTOR,
  45 };
  46 #else
  47 #define CTL_LNET           CTL_UNNUMBERED
  48 #define PSDEV_LNET_STATS   CTL_UNNUMBERED
  49 #define PSDEV_LNET_ROUTES  CTL_UNNUMBERED
  50 #define PSDEV_LNET_ROUTERS CTL_UNNUMBERED
  51 #define PSDEV_LNET_PEERS   CTL_UNNUMBERED
  52 #define PSDEV_LNET_BUFFERS CTL_UNNUMBERED
  53 #define PSDEV_LNET_NIS     CTL_UNNUMBERED
  54 #define PSDEV_LNET_PTL_ROTOR    CTL_UNNUMBERED
  55 #endif
  56
  57 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  58 /*
  59  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  60  */
  61 #define LNET_PROC_CPT_BITS      LNET_CPT_BITS
  62 /* change version, 16 bits or 8 bits */
  63 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  64
  65 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  66 /*
  67  * bits for peer hash offset
  68  * NB: we don't use the highest bit of *ppos because it's signed
  69  */
  70 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  71                                  LNET_PROC_CPT_BITS -    \
  72                                  LNET_PROC_VER_BITS -    \
  73                                  LNET_PROC_HASH_BITS - 1)
  74 /* bits for hash index + position */
  75 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  76 /* bits for peer hash table + hash version */
  77 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  78
  79 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  80 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  81 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  82 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  83
  84 #define LNET_PROC_CPT_GET(pos)                          \
  85         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  86
  87 #define LNET_PROC_VER_GET(pos)                          \
  88         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  89
  90 #define LNET_PROC_HASH_GET(pos)                         \
  91         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  92
  93 #define LNET_PROC_HOFF_GET(pos)                         \
  94         (int)((pos) & LNET_PROC_HOFF_MASK)
  95
  96 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  97         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  98         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  99         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
 100         ((off) & LNET_PROC_HOFF_MASK))
 101
 102 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
 103
 104 static int __proc_lnet_stats(void *data, int write,
 105                              loff_t pos, void *buffer, int nob)
 106 {
 107         int              rc;
 108         lnet_counters_t *ctrs;
 109         int              len;
 110         char            *tmpstr;
 111         const int        tmpsiz = 256; /* 7 %u and 4 LPU64 */
 112
 113         if (write) {
 114                 lnet_counters_reset();
 115                 return 0;
 116         }
 117
 118         /* read */
 119
 120         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
 121         if (ctrs == NULL)
 122                 return -ENOMEM;
 123
 124         LIBCFS_ALLOC(tmpstr, tmpsiz);
 125         if (tmpstr == NULL) {
 126                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 127                 return -ENOMEM;
 128         }
 129
 130         lnet_counters_get(ctrs);
 131
 132         len = snprintf(tmpstr, tmpsiz,
 133                        "%u %u %u %u %u %u %u "LPU64" "LPU64" "
 134                        LPU64" "LPU64,
 135                        ctrs->msgs_alloc, ctrs->msgs_max,
 136                        ctrs->errors,
 137                        ctrs->send_count, ctrs->recv_count,
 138                        ctrs->route_count, ctrs->drop_count,
 139                        ctrs->send_length, ctrs->recv_length,
 140                        ctrs->route_length, ctrs->drop_length);
 141
 142         if (pos >= min_t(int, len, strlen(tmpstr)))
 143                 rc = 0;
 144         else
 145                 rc = cfs_trace_copyout_string(buffer, nob,
 146                                               tmpstr + pos, "\n");
 147
 148         LIBCFS_FREE(tmpstr, tmpsiz);
 149         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 150         return rc;
 151 }
 152
 153 DECLARE_PROC_HANDLER(proc_lnet_stats);
 154
 155 int LL_PROC_PROTO(proc_lnet_routes)
 156 {
 157         const int       tmpsiz = 256;
 158         char            *tmpstr;
 159         char            *s;
 160         int             rc = 0;
 161         int             len;
 162         int             ver;
 163         int             off;
 164
 165         DECLARE_LL_PROC_PPOS_DECL;
 166
 167         CLASSERT(sizeof(loff_t) >= 4);
 168
 169         off = LNET_PROC_HOFF_GET(*ppos);
 170         ver = LNET_PROC_VER_GET(*ppos);
 171
 172         LASSERT (!write);
 173
 174         if (*lenp == 0)
 175                 return 0;
 176
 177         LIBCFS_ALLOC(tmpstr, tmpsiz);
 178         if (tmpstr == NULL)
 179                 return -ENOMEM;
 180
 181         s = tmpstr; /* points to current position in tmpstr[] */
 182
 183         if (*ppos == 0) {
 184                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 185                               the_lnet.ln_routing ? "enabled" : "disabled");
 186                 LASSERT (tmpstr + tmpsiz - s > 0);
 187
 188                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %7s %s\n",
 189                               "net", "hops", "state", "router");
 190                 LASSERT (tmpstr + tmpsiz - s > 0);
 191
 192                 lnet_net_lock(0);
 193                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 194                 lnet_net_unlock(0);
 195                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 196         } else {
 197                 cfs_list_t              *n;
 198                 cfs_list_t              *r;
 199                 lnet_route_t            *route = NULL;
 200                 lnet_remotenet_t        *rnet  = NULL;
 201                 int                     skip  = off - 1;
 202
 203                 lnet_net_lock(0);
 204
 205                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 206                         lnet_net_unlock(0);
 207                         LIBCFS_FREE(tmpstr, tmpsiz);
 208                         return -ESTALE;
 209                 }
 210
 211                 n = the_lnet.ln_remote_nets.next;
 212
 213                 while (n != &the_lnet.ln_remote_nets && route == NULL) {
 214                         rnet = cfs_list_entry(n, lnet_remotenet_t, lrn_list);
 215
 216                         r = rnet->lrn_routes.next;
 217
 218                         while (r != &rnet->lrn_routes) {
 219                                 lnet_route_t *re =
 220                                         cfs_list_entry(r, lnet_route_t,
 221                                                        lr_list);
 222                                 if (skip == 0) {
 223                                         route = re;
 224                                         break;
 225                                 }
 226
 227                                 skip--;
 228                                 r = r->next;
 229                         }
 230
 231                         n = n->next;
 232                 }
 233
 234                 if (route != NULL) {
 235                         __u32        net   = rnet->lrn_net;
 236                         unsigned int hops  = route->lr_hops;
 237                         lnet_nid_t   nid   = route->lr_gateway->lp_nid;
 238                         int          alive = route->lr_gateway->lp_alive;
 239
 240                         s += snprintf(s, tmpstr + tmpsiz - s,
 241                                       "%-8s %4u %7s %s\n",
 242                                       libcfs_net2str(net), hops,
 243                                       alive ? "up" : "down",
 244                                       libcfs_nid2str(nid));
 245                         LASSERT(tmpstr + tmpsiz - s > 0);
 246                 }
 247
 248                 lnet_net_unlock(0);
 249         }
 250
 251         len = s - tmpstr;     /* how many bytes was written */
 252
 253         if (len > *lenp) {    /* linux-supplied buffer is too small */
 254                 rc = -EINVAL;
 255         } else if (len > 0) { /* wrote something */
 256                 if (cfs_copy_to_user(buffer, tmpstr, len))
 257                         rc = -EFAULT;
 258                 else {
 259                         off += 1;
 260                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 261                 }
 262         }
 263
 264         LIBCFS_FREE(tmpstr, tmpsiz);
 265
 266         if (rc == 0)
 267                 *lenp = len;
 268
 269         return rc;
 270 }
 271
 272 int LL_PROC_PROTO(proc_lnet_routers)
 273 {
 274         int        rc = 0;
 275         char      *tmpstr;
 276         char      *s;
 277         const int  tmpsiz = 256;
 278         int        len;
 279         int        ver;
 280         int        off;
 281
 282         DECLARE_LL_PROC_PPOS_DECL;
 283
 284         off = LNET_PROC_HOFF_GET(*ppos);
 285         ver = LNET_PROC_VER_GET(*ppos);
 286
 287         LASSERT (!write);
 288
 289         if (*lenp == 0)
 290                 return 0;
 291
 292         LIBCFS_ALLOC(tmpstr, tmpsiz);
 293         if (tmpstr == NULL)
 294                 return -ENOMEM;
 295
 296         s = tmpstr; /* points to current position in tmpstr[] */
 297
 298         if (*ppos == 0) {
 299                 s += snprintf(s, tmpstr + tmpsiz - s,
 300                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 301                               "ref", "rtr_ref", "alive_cnt", "state",
 302                               "last_ping", "ping_sent", "deadline",
 303                               "down_ni", "router");
 304                 LASSERT(tmpstr + tmpsiz - s > 0);
 305
 306                 lnet_net_lock(0);
 307                 ver = (unsigned int)the_lnet.ln_routers_version;
 308                 lnet_net_unlock(0);
 309                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 310         } else {
 311                 cfs_list_t              *r;
 312                 struct lnet_peer        *peer = NULL;
 313                 int                     skip = off - 1;
 314
 315                 lnet_net_lock(0);
 316
 317                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 318                         lnet_net_unlock(0);
 319
 320                         LIBCFS_FREE(tmpstr, tmpsiz);
 321                         return -ESTALE;
 322                 }
 323
 324                 r = the_lnet.ln_routers.next;
 325
 326                 while (r != &the_lnet.ln_routers) {
 327                         lnet_peer_t *lp = cfs_list_entry(r, lnet_peer_t,
 328                                                          lp_rtr_list);
 329
 330                         if (skip == 0) {
 331                                 peer = lp;
 332                                 break;
 333                         }
 334
 335                         skip--;
 336                         r = r->next;
 337                 }
 338
 339                 if (peer != NULL) {
 340                         lnet_nid_t nid = peer->lp_nid;
 341                         cfs_time_t now = cfs_time_current();
 342                         cfs_time_t deadline = peer->lp_ping_deadline;
 343                         int nrefs     = peer->lp_refcount;
 344                         int nrtrrefs  = peer->lp_rtr_refcount;
 345                         int alive_cnt = peer->lp_alive_count;
 346                         int alive     = peer->lp_alive;
 347                         int pingsent  = !peer->lp_ping_notsent;
 348                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 349                                                      peer->lp_ping_timestamp));
 350                         int down_ni   = 0;
 351                         lnet_route_t *rtr;
 352
 353                         if ((peer->lp_ping_feats &
 354                              LNET_PING_FEAT_NI_STATUS) != 0) {
 355                                 cfs_list_for_each_entry(rtr, &peer->lp_routes,
 356                                                         lr_gwlist) {
 357                                         /* downis on any route should be the
 358                                          * number of downis on the gateway */
 359                                         if (rtr->lr_downis != 0) {
 360                                                 down_ni = rtr->lr_downis;
 361                                                 break;
 362                                         }
 363                                 }
 364                         }
 365
 366                         if (deadline == 0)
 367                                 s += snprintf(s, tmpstr + tmpsiz - s,
 368                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 369                                               nrefs, nrtrrefs, alive_cnt,
 370                                               alive ? "up" : "down", last_ping,
 371                                               pingsent, "NA", down_ni,
 372                                               libcfs_nid2str(nid));
 373                         else
 374                                 s += snprintf(s, tmpstr + tmpsiz - s,
 375                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 376                                               nrefs, nrtrrefs, alive_cnt,
 377                                               alive ? "up" : "down", last_ping,
 378                                               pingsent,
 379                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 380                                               down_ni, libcfs_nid2str(nid));
 381                         LASSERT (tmpstr + tmpsiz - s > 0);
 382                 }
 383
 384                 lnet_net_unlock(0);
 385         }
 386
 387         len = s - tmpstr;     /* how many bytes was written */
 388
 389         if (len > *lenp) {    /* linux-supplied buffer is too small */
 390                 rc = -EINVAL;
 391         } else if (len > 0) { /* wrote something */
 392                 if (cfs_copy_to_user(buffer, tmpstr, len))
 393                         rc = -EFAULT;
 394                 else {
 395                         off += 1;
 396                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 397                 }
 398         }
 399
 400         LIBCFS_FREE(tmpstr, tmpsiz);
 401
 402         if (rc == 0)
 403                 *lenp = len;
 404
 405         return rc;
 406 }
 407
 408 int LL_PROC_PROTO(proc_lnet_peers)
 409 {
 410         const int               tmpsiz  = 256;
 411         struct lnet_peer_table  *ptable;
 412         char                    *tmpstr;
 413         char                    *s;
 414         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 415         int                     ver  = LNET_PROC_VER_GET(*ppos);
 416         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 417         int                     hash = LNET_PROC_HASH_GET(*ppos);
 418         int                     rc = 0;
 419         int                     len;
 420
 421         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 422         LASSERT(!write);
 423
 424         if (*lenp == 0)
 425                 return 0;
 426
 427         if (cpt >= LNET_CPT_NUMBER)
 428                 return 0;
 429
 430         LIBCFS_ALLOC(tmpstr, tmpsiz);
 431         if (tmpstr == NULL)
 432                 return -ENOMEM;
 433
 434         s = tmpstr; /* points to current position in tmpstr[] */
 435
 436         if (*ppos == 0) {
 437                 s += snprintf(s, tmpstr + tmpsiz - s,
 438                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 439                               "nid", "refs", "state", "last", "max",
 440                               "rtr", "min", "tx", "min", "queue");
 441                 LASSERT (tmpstr + tmpsiz - s > 0);
 442
 443                 hoff++;
 444         } else {
 445                 struct lnet_peer        *peer   = NULL;
 446                 cfs_list_t              *p      = NULL;
 447                 int                     skip    = hoff - 1;
 448
 449  again:
 450                 lnet_net_lock(cpt);
 451                 ptable = the_lnet.ln_peer_tables[cpt];
 452                 if (hoff == 1)
 453                         ver = LNET_PROC_VERSION(ptable->pt_version);
 454
 455                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 456                         lnet_net_unlock(cpt);
 457                         LIBCFS_FREE(tmpstr, tmpsiz);
 458                         return -ESTALE;
 459                 }
 460
 461                 while (hash < LNET_PEER_HASH_SIZE) {
 462                         if (p == NULL)
 463                                 p = ptable->pt_hash[hash].next;
 464
 465                         while (p != &ptable->pt_hash[hash]) {
 466                                 lnet_peer_t *lp = cfs_list_entry(p, lnet_peer_t,
 467                                                                  lp_hashlist);
 468                                 if (skip == 0) {
 469                                         peer = lp;
 470
 471                                         /* minor optimization: start from idx+1
 472                                          * on next iteration if we've just
 473                                          * drained lp_hashlist */
 474                                         if (lp->lp_hashlist.next ==
 475                                             &ptable->pt_hash[hash]) {
 476                                                 hoff = 1;
 477                                                 hash++;
 478                                         } else {
 479                                                 hoff++;
 480                                         }
 481
 482                                         break;
 483                                 }
 484
 485                                 skip--;
 486                                 p = lp->lp_hashlist.next;
 487                         }
 488
 489                         if (peer != NULL)
 490                                 break;
 491
 492                         p = NULL;
 493                         hoff = 1;
 494                         hash++;
 495                 }
 496
 497                 if (peer != NULL) {
 498                         lnet_nid_t nid       = peer->lp_nid;
 499                         int        nrefs     = peer->lp_refcount;
 500                         int        lastalive = -1;
 501                         char      *aliveness = "NA";
 502                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 503                         int        txcr      = peer->lp_txcredits;
 504                         int        mintxcr   = peer->lp_mintxcredits;
 505                         int        rtrcr     = peer->lp_rtrcredits;
 506                         int        minrtrcr  = peer->lp_minrtrcredits;
 507                         int        txqnob    = peer->lp_txqnob;
 508
 509                         if (lnet_isrouter(peer) ||
 510                             lnet_peer_aliveness_enabled(peer))
 511                                 aliveness = peer->lp_alive ? "up" : "down";
 512
 513                         if (lnet_peer_aliveness_enabled(peer)) {
 514                                 cfs_time_t     now = cfs_time_current();
 515                                 cfs_duration_t delta;
 516
 517                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 518                                 lastalive = cfs_duration_sec(delta);
 519
 520                                 /* No need to mess up peers contents with
 521                                  * arbitrarily long integers - it suffices to
 522                                  * know that lastalive is more than 10000s old
 523                                  */
 524                                 if (lastalive >= 10000)
 525                                         lastalive = 9999;
 526                         }
 527
 528                         lnet_net_unlock(cpt);
 529
 530                         s += snprintf(s, tmpstr + tmpsiz - s,
 531                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 532                                       libcfs_nid2str(nid), nrefs, aliveness,
 533                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 534                                       mintxcr, txqnob);
 535                         LASSERT (tmpstr + tmpsiz - s > 0);
 536
 537                 } else { /* peer is NULL */
 538                         lnet_net_unlock(cpt);
 539
 540                         if (hash == LNET_PEER_HASH_SIZE &&
 541                             cpt < LNET_CPT_NUMBER - 1) {
 542                                 cpt++;
 543                                 hash = 0;
 544                                 hoff = 1;
 545                                 goto again;
 546                         }
 547                 }
 548         }
 549
 550         len = s - tmpstr;     /* how many bytes was written */
 551
 552         if (len > *lenp) {    /* linux-supplied buffer is too small */
 553                 rc = -EINVAL;
 554         } else if (len > 0) { /* wrote something */
 555                 if (cfs_copy_to_user(buffer, tmpstr, len))
 556                         rc = -EFAULT;
 557                 else
 558                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 559         }
 560
 561         LIBCFS_FREE(tmpstr, tmpsiz);
 562
 563         if (rc == 0)
 564                 *lenp = len;
 565
 566         return rc;
 567 }
 568
 569 static int __proc_lnet_buffers(void *data, int write,
 570                                loff_t pos, void *buffer, int nob)
 571 {
 572         char            *s;
 573         char            *tmpstr;
 574         int             tmpsiz;
 575         int             idx;
 576         int             len;
 577         int             rc;
 578         int             i;
 579
 580         LASSERT(!write);
 581
 582         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 583         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 584         LIBCFS_ALLOC(tmpstr, tmpsiz);
 585         if (tmpstr == NULL)
 586                 return -ENOMEM;
 587
 588         s = tmpstr; /* points to current position in tmpstr[] */
 589
 590         s += snprintf(s, tmpstr + tmpsiz - s,
 591                       "%5s %5s %7s %7s\n",
 592                       "pages", "count", "credits", "min");
 593         LASSERT (tmpstr + tmpsiz - s > 0);
 594
 595         if (the_lnet.ln_rtrpools == NULL)
 596                 goto out; /* I'm not a router */
 597
 598         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 599                 lnet_rtrbufpool_t *rbp;
 600
 601                 lnet_net_lock(LNET_LOCK_EX);
 602                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 603                         s += snprintf(s, tmpstr + tmpsiz - s,
 604                                       "%5d %5d %7d %7d\n",
 605                                       rbp[idx].rbp_npages,
 606                                       rbp[idx].rbp_nbuffers,
 607                                       rbp[idx].rbp_credits,
 608                                       rbp[idx].rbp_mincredits);
 609                         LASSERT(tmpstr + tmpsiz - s > 0);
 610                 }
 611                 lnet_net_unlock(LNET_LOCK_EX);
 612         }
 613
 614  out:
 615         len = s - tmpstr;
 616
 617         if (pos >= min_t(int, len, strlen(tmpstr)))
 618                 rc = 0;
 619         else
 620                 rc = cfs_trace_copyout_string(buffer, nob,
 621                                               tmpstr + pos, NULL);
 622
 623         LIBCFS_FREE(tmpstr, tmpsiz);
 624         return rc;
 625 }
 626
 627 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 628
 629 int LL_PROC_PROTO(proc_lnet_nis)
 630 {
 631         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 632         int        rc = 0;
 633         char      *tmpstr;
 634         char      *s;
 635         int        len;
 636
 637         DECLARE_LL_PROC_PPOS_DECL;
 638
 639         LASSERT (!write);
 640
 641         if (*lenp == 0)
 642                 return 0;
 643
 644         LIBCFS_ALLOC(tmpstr, tmpsiz);
 645         if (tmpstr == NULL)
 646                 return -ENOMEM;
 647
 648         s = tmpstr; /* points to current position in tmpstr[] */
 649
 650         if (*ppos == 0) {
 651                 s += snprintf(s, tmpstr + tmpsiz - s,
 652                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 653                               "nid", "status", "alive", "refs", "peer",
 654                               "rtr", "max", "tx", "min");
 655                 LASSERT (tmpstr + tmpsiz - s > 0);
 656         } else {
 657                 cfs_list_t        *n;
 658                 lnet_ni_t         *ni   = NULL;
 659                 int                skip = *ppos - 1;
 660
 661                 lnet_net_lock(0);
 662
 663                 n = the_lnet.ln_nis.next;
 664
 665                 while (n != &the_lnet.ln_nis) {
 666                         lnet_ni_t *a_ni = cfs_list_entry(n, lnet_ni_t, ni_list);
 667
 668                         if (skip == 0) {
 669                                 ni = a_ni;
 670                                 break;
 671                         }
 672
 673                         skip--;
 674                         n = n->next;
 675                 }
 676
 677                 if (ni != NULL) {
 678                         struct lnet_tx_queue    *tq;
 679                         char    *stat;
 680                         long    now = cfs_time_current_sec();
 681                         int     last_alive = -1;
 682                         int     i;
 683                         int     j;
 684
 685                         if (the_lnet.ln_routing)
 686                                 last_alive = now - ni->ni_last_alive;
 687
 688                         /* @lo forever alive */
 689                         if (ni->ni_lnd->lnd_type == LOLND)
 690                                 last_alive = 0;
 691
 692                         lnet_ni_lock(ni);
 693                         LASSERT(ni->ni_status != NULL);
 694                         stat = (ni->ni_status->ns_status ==
 695                                 LNET_NI_STATUS_UP) ? "up" : "down";
 696                         lnet_ni_unlock(ni);
 697
 698                         /* we actually output credits information for
 699                          * TX queue of each partition */
 700                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 701                                 for (j = 0; ni->ni_cpts != NULL &&
 702                                      j < ni->ni_ncpts; j++) {
 703                                         if (i == ni->ni_cpts[j])
 704                                                 break;
 705                                 }
 706
 707                                 if (j == ni->ni_ncpts)
 708                                         continue;
 709
 710                                 if (i != 0)
 711                                         lnet_net_lock(i);
 712
 713                                 s += snprintf(s, tmpstr + tmpsiz - s,
 714                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 715                                       libcfs_nid2str(ni->ni_nid), stat,
 716                                       last_alive, *ni->ni_refs[i],
 717                                       ni->ni_peertxcredits,
 718                                       ni->ni_peerrtrcredits,
 719                                       tq->tq_credits_max,
 720                                       tq->tq_credits, tq->tq_credits_min);
 721                                 if (i != 0)
 722                                         lnet_net_unlock(i);
 723                         }
 724                         LASSERT(tmpstr + tmpsiz - s > 0);
 725                 }
 726
 727                 lnet_net_unlock(0);
 728         }
 729
 730         len = s - tmpstr;     /* how many bytes was written */
 731
 732         if (len > *lenp) {    /* linux-supplied buffer is too small */
 733                 rc = -EINVAL;
 734         } else if (len > 0) { /* wrote something */
 735                 if (cfs_copy_to_user(buffer, tmpstr, len))
 736                         rc = -EFAULT;
 737                 else
 738                         *ppos += 1;
 739         }
 740
 741         LIBCFS_FREE(tmpstr, tmpsiz);
 742
 743         if (rc == 0)
 744                 *lenp = len;
 745
 746         return rc;
 747 }
 748
 749 struct lnet_portal_rotors {
 750         int             pr_value;
 751         const char      *pr_name;
 752         const char      *pr_desc;
 753 };
 754
 755 static struct lnet_portal_rotors        portal_rotors[] = {
 756         {
 757                 .pr_value = LNET_PTL_ROTOR_OFF,
 758                 .pr_name  = "OFF",
 759                 .pr_desc  = "Turn off message rotor for wildcard portals"
 760         },
 761         {
 762                 .pr_value = LNET_PTL_ROTOR_ON,
 763                 .pr_name  = "ON",
 764                 .pr_desc  = "round-robin dispatch all PUT messages for "
 765                             "wildcard portals"
 766         },
 767         {
 768                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 769                 .pr_name  = "RR_RT",
 770                 .pr_desc  = "round-robin dispatch routed PUT message for "
 771                             "wildcard portals"
 772         },
 773         {
 774                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 775                 .pr_name  = "HASH_RT",
 776                 .pr_desc  = "dispatch routed PUT message by hashing source "
 777                             "NID for wildcard portals"
 778         },
 779         {
 780                 .pr_value = -1,
 781                 .pr_name  = NULL,
 782                 .pr_desc  = NULL
 783         },
 784 };
 785
 786 extern int portal_rotor;
 787
 788 static int __proc_lnet_portal_rotor(void *data, int write,
 789                                     loff_t pos, void *buffer, int nob)
 790 {
 791         const int       buf_len = 128;
 792         char            *buf;
 793         char            *tmp;
 794         int             rc;
 795         int             i;
 796
 797         LIBCFS_ALLOC(buf, buf_len);
 798         if (buf == NULL)
 799                 return -ENOMEM;
 800
 801         if (!write) {
 802                 lnet_res_lock(0);
 803
 804                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 805                         if (portal_rotors[i].pr_value == portal_rotor)
 806                                 break;
 807                 }
 808
 809                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 810                 lnet_res_unlock(0);
 811
 812                 rc = snprintf(buf, buf_len,
 813                               "{\n\tportals: all\n"
 814                               "\trotor: %s\n\tdescription: %s\n}",
 815                               portal_rotors[i].pr_name,
 816                               portal_rotors[i].pr_desc);
 817
 818                 if (pos >= min_t(int, rc, buf_len)) {
 819                         rc = 0;
 820                 } else {
 821                         rc = cfs_trace_copyout_string(buffer, nob,
 822                                         buf + pos, "\n");
 823                 }
 824                 goto out;
 825         }
 826
 827         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 828         if (rc < 0)
 829                 goto out;
 830
 831         tmp = cfs_trimwhite(buf);
 832
 833         rc = -EINVAL;
 834         lnet_res_lock(0);
 835         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 836                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 837                                     strlen(portal_rotors[i].pr_name)) == 0) {
 838                         portal_rotor = portal_rotors[i].pr_value;
 839                         rc = 0;
 840                         break;
 841                 }
 842         }
 843         lnet_res_unlock(0);
 844 out:
 845         LIBCFS_FREE(buf, buf_len);
 846         return rc;
 847 }
 848 DECLARE_PROC_HANDLER(proc_lnet_portal_rotor);
 849
 850 static cfs_sysctl_table_t lnet_table[] = {
 851         /*
 852          * NB No .strategy entries have been provided since sysctl(8) prefers
 853          * to go via /proc for portability.
 854          */
 855         {
 856                 INIT_CTL_NAME(PSDEV_LNET_STATS)
 857                 .procname = "stats",
 858                 .mode     = 0644,
 859                 .proc_handler = &proc_lnet_stats,
 860         },
 861         {
 862                 INIT_CTL_NAME(PSDEV_LNET_ROUTES)
 863                 .procname = "routes",
 864                 .mode     = 0444,
 865                 .proc_handler = &proc_lnet_routes,
 866         },
 867         {
 868                 INIT_CTL_NAME(PSDEV_LNET_ROUTERS)
 869                 .procname = "routers",
 870                 .mode     = 0444,
 871                 .proc_handler = &proc_lnet_routers,
 872         },
 873         {
 874                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 875                 .procname = "peers",
 876                 .mode     = 0444,
 877                 .proc_handler = &proc_lnet_peers,
 878         },
 879         {
 880                 INIT_CTL_NAME(PSDEV_LNET_PEERS)
 881                 .procname = "buffers",
 882                 .mode     = 0444,
 883                 .proc_handler = &proc_lnet_buffers,
 884         },
 885         {
 886                 INIT_CTL_NAME(PSDEV_LNET_NIS)
 887                 .procname = "nis",
 888                 .mode     = 0444,
 889                 .proc_handler = &proc_lnet_nis,
 890         },
 891         {
 892                 INIT_CTL_NAME(PSDEV_LNET_PTL_ROTOR)
 893                 .procname = "portal_rotor",
 894                 .mode     = 0644,
 895                 .proc_handler = &proc_lnet_portal_rotor,
 896         },
 897         {
 898                 INIT_CTL_NAME(0)
 899         }
 900 };
 901
 902 static cfs_sysctl_table_t top_table[] = {
 903         {
 904                 INIT_CTL_NAME(CTL_LNET)
 905                 .procname = "lnet",
 906                 .mode     = 0555,
 907                 .data     = NULL,
 908                 .maxlen   = 0,
 909                 .child    = lnet_table,
 910         },
 911         {
 912                 INIT_CTL_NAME(0)
 913         }
 914 };
 915
 916 void
 917 lnet_proc_init(void)
 918 {
 919 #ifdef CONFIG_SYSCTL
 920         if (lnet_table_header == NULL)
 921                 lnet_table_header = cfs_register_sysctl_table(top_table, 0);
 922 #endif
 923 }
 924
 925 void
 926 lnet_proc_fini(void)
 927 {
 928 #ifdef CONFIG_SYSCTL
 929         if (lnet_table_header != NULL)
 930                 cfs_unregister_sysctl_table(lnet_table_header);
 931
 932         lnet_table_header = NULL;
 933 #endif
 934 }
 935
 936 #else
 937
 938 void
 939 lnet_proc_init(void)
 940 {
 941 }
 942
 943 void
 944 lnet_proc_fini(void)
 945 {
 946 }
 947
 948 #endif