lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2013, Intel Corporation.
   5  *
   6  *   This file is part of Portals
   7  *   http://sourceforge.net/projects/sandiaportals/
   8  *
   9  *   Portals is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Portals is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Portals; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LNET
  25 #include <libcfs/libcfs.h>
  26 #include <lnet/lib-lnet.h>
  27
  28 #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 struct ctl_table_header *lnet_table_header = NULL;
  34
  35 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  36 /*
  37  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  38  */
  39 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  40 /* change version, 16 bits or 8 bits */
  41 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  42
  43 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  44 /*
  45  * bits for peer hash offset
  46  * NB: we don't use the highest bit of *ppos because it's signed
  47  */
  48 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  49                                  LNET_PROC_CPT_BITS -    \
  50                                  LNET_PROC_VER_BITS -    \
  51                                  LNET_PROC_HASH_BITS - 1)
  52 /* bits for hash index + position */
  53 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  54 /* bits for peer hash table + hash version */
  55 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  56
  57 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  58 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  59 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  60 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  61
  62 #define LNET_PROC_CPT_GET(pos)                          \
  63         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  64
  65 #define LNET_PROC_VER_GET(pos)                          \
  66         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  67
  68 #define LNET_PROC_HASH_GET(pos)                         \
  69         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  70
  71 #define LNET_PROC_HOFF_GET(pos)                         \
  72         (int)((pos) & LNET_PROC_HOFF_MASK)
  73
  74 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  75         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  76         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  77         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  78         ((off) & LNET_PROC_HOFF_MASK))
  79
  80 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  81
  82 static int __proc_lnet_stats(void *data, int write,
  83                              loff_t pos, void *buffer, int nob)
  84 {
  85         int              rc;
  86         lnet_counters_t *ctrs;
  87         int              len;
  88         char            *tmpstr;
  89         const int        tmpsiz = 256; /* 7 %u and 4 LPU64 */
  90
  91         if (write) {
  92                 lnet_counters_reset();
  93                 return 0;
  94         }
  95
  96         /* read */
  97
  98         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  99         if (ctrs == NULL)
 100                 return -ENOMEM;
 101
 102         LIBCFS_ALLOC(tmpstr, tmpsiz);
 103         if (tmpstr == NULL) {
 104                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 105                 return -ENOMEM;
 106         }
 107
 108         lnet_counters_get(ctrs);
 109
 110         len = snprintf(tmpstr, tmpsiz,
 111                        "%u %u %u %u %u %u %u "LPU64" "LPU64" "
 112                        LPU64" "LPU64,
 113                        ctrs->msgs_alloc, ctrs->msgs_max,
 114                        ctrs->errors,
 115                        ctrs->send_count, ctrs->recv_count,
 116                        ctrs->route_count, ctrs->drop_count,
 117                        ctrs->send_length, ctrs->recv_length,
 118                        ctrs->route_length, ctrs->drop_length);
 119
 120         if (pos >= min_t(int, len, strlen(tmpstr)))
 121                 rc = 0;
 122         else
 123                 rc = cfs_trace_copyout_string(buffer, nob,
 124                                               tmpstr + pos, "\n");
 125
 126         LIBCFS_FREE(tmpstr, tmpsiz);
 127         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 128         return rc;
 129 }
 130
 131 DECLARE_PROC_HANDLER(proc_lnet_stats);
 132
 133 int LL_PROC_PROTO(proc_lnet_routes)
 134 {
 135         const int       tmpsiz = 256;
 136         char            *tmpstr;
 137         char            *s;
 138         int             rc = 0;
 139         int             len;
 140         int             ver;
 141         int             off;
 142
 143         CLASSERT(sizeof(loff_t) >= 4);
 144
 145         off = LNET_PROC_HOFF_GET(*ppos);
 146         ver = LNET_PROC_VER_GET(*ppos);
 147
 148         LASSERT (!write);
 149
 150         if (*lenp == 0)
 151                 return 0;
 152
 153         LIBCFS_ALLOC(tmpstr, tmpsiz);
 154         if (tmpstr == NULL)
 155                 return -ENOMEM;
 156
 157         s = tmpstr; /* points to current position in tmpstr[] */
 158
 159         if (*ppos == 0) {
 160                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 161                               the_lnet.ln_routing ? "enabled" : "disabled");
 162                 LASSERT (tmpstr + tmpsiz - s > 0);
 163
 164                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 165                               "net", "hops", "priority", "state", "router");
 166                 LASSERT (tmpstr + tmpsiz - s > 0);
 167
 168                 lnet_net_lock(0);
 169                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 170                 lnet_net_unlock(0);
 171                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 172         } else {
 173                 struct list_head        *n;
 174                 struct list_head        *r;
 175                 lnet_route_t            *route = NULL;
 176                 lnet_remotenet_t        *rnet  = NULL;
 177                 int                     skip  = off - 1;
 178                 struct list_head        *rn_list;
 179                 int                     i;
 180
 181                 lnet_net_lock(0);
 182
 183                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 184                         lnet_net_unlock(0);
 185                         LIBCFS_FREE(tmpstr, tmpsiz);
 186                         return -ESTALE;
 187                 }
 188
 189                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 190                      i++) {
 191                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 192
 193                         n = rn_list->next;
 194
 195                         while (n != rn_list && route == NULL) {
 196                                 rnet = list_entry(n, lnet_remotenet_t,
 197                                                   lrn_list);
 198
 199                                 r = rnet->lrn_routes.next;
 200
 201                                 while (r != &rnet->lrn_routes) {
 202                                         lnet_route_t *re =
 203                                                 list_entry(r, lnet_route_t,
 204                                                            lr_list);
 205                                         if (skip == 0) {
 206                                                 route = re;
 207                                                 break;
 208                                         }
 209
 210                                         skip--;
 211                                         r = r->next;
 212                                 }
 213
 214                                 n = n->next;
 215                         }
 216                 }
 217
 218                 if (route != NULL) {
 219                         __u32        net        = rnet->lrn_net;
 220                         unsigned int hops       = route->lr_hops;
 221                         unsigned int priority   = route->lr_priority;
 222                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 223                         int          alive      = lnet_is_route_alive(route);
 224
 225                         s += snprintf(s, tmpstr + tmpsiz - s,
 226                                       "%-8s %4u %8u %7s %s\n",
 227                                       libcfs_net2str(net), hops,
 228                                       priority,
 229                                       alive ? "up" : "down",
 230                                       libcfs_nid2str(nid));
 231                         LASSERT(tmpstr + tmpsiz - s > 0);
 232                 }
 233
 234                 lnet_net_unlock(0);
 235         }
 236
 237         len = s - tmpstr;     /* how many bytes was written */
 238
 239         if (len > *lenp) {    /* linux-supplied buffer is too small */
 240                 rc = -EINVAL;
 241         } else if (len > 0) { /* wrote something */
 242                 if (copy_to_user(buffer, tmpstr, len))
 243                         rc = -EFAULT;
 244                 else {
 245                         off += 1;
 246                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 247                 }
 248         }
 249
 250         LIBCFS_FREE(tmpstr, tmpsiz);
 251
 252         if (rc == 0)
 253                 *lenp = len;
 254
 255         return rc;
 256 }
 257
 258 int LL_PROC_PROTO(proc_lnet_routers)
 259 {
 260         int        rc = 0;
 261         char      *tmpstr;
 262         char      *s;
 263         const int  tmpsiz = 256;
 264         int        len;
 265         int        ver;
 266         int        off;
 267
 268         off = LNET_PROC_HOFF_GET(*ppos);
 269         ver = LNET_PROC_VER_GET(*ppos);
 270
 271         LASSERT (!write);
 272
 273         if (*lenp == 0)
 274                 return 0;
 275
 276         LIBCFS_ALLOC(tmpstr, tmpsiz);
 277         if (tmpstr == NULL)
 278                 return -ENOMEM;
 279
 280         s = tmpstr; /* points to current position in tmpstr[] */
 281
 282         if (*ppos == 0) {
 283                 s += snprintf(s, tmpstr + tmpsiz - s,
 284                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 285                               "ref", "rtr_ref", "alive_cnt", "state",
 286                               "last_ping", "ping_sent", "deadline",
 287                               "down_ni", "router");
 288                 LASSERT(tmpstr + tmpsiz - s > 0);
 289
 290                 lnet_net_lock(0);
 291                 ver = (unsigned int)the_lnet.ln_routers_version;
 292                 lnet_net_unlock(0);
 293                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 294         } else {
 295                 struct list_head *r;
 296                 struct lnet_peer *peer = NULL;
 297                 int               skip = off - 1;
 298
 299                 lnet_net_lock(0);
 300
 301                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 302                         lnet_net_unlock(0);
 303
 304                         LIBCFS_FREE(tmpstr, tmpsiz);
 305                         return -ESTALE;
 306                 }
 307
 308                 r = the_lnet.ln_routers.next;
 309
 310                 while (r != &the_lnet.ln_routers) {
 311                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 312                                                      lp_rtr_list);
 313
 314                         if (skip == 0) {
 315                                 peer = lp;
 316                                 break;
 317                         }
 318
 319                         skip--;
 320                         r = r->next;
 321                 }
 322
 323                 if (peer != NULL) {
 324                         lnet_nid_t nid = peer->lp_nid;
 325                         cfs_time_t now = cfs_time_current();
 326                         cfs_time_t deadline = peer->lp_ping_deadline;
 327                         int nrefs     = peer->lp_refcount;
 328                         int nrtrrefs  = peer->lp_rtr_refcount;
 329                         int alive_cnt = peer->lp_alive_count;
 330                         int alive     = peer->lp_alive;
 331                         int pingsent  = !peer->lp_ping_notsent;
 332                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 333                                                      peer->lp_ping_timestamp));
 334                         int down_ni   = 0;
 335                         lnet_route_t *rtr;
 336
 337                         if ((peer->lp_ping_feats &
 338                              LNET_PING_FEAT_NI_STATUS) != 0) {
 339                                 list_for_each_entry(rtr, &peer->lp_routes,
 340                                                     lr_gwlist) {
 341                                         /* downis on any route should be the
 342                                          * number of downis on the gateway */
 343                                         if (rtr->lr_downis != 0) {
 344                                                 down_ni = rtr->lr_downis;
 345                                                 break;
 346                                         }
 347                                 }
 348                         }
 349
 350                         if (deadline == 0)
 351                                 s += snprintf(s, tmpstr + tmpsiz - s,
 352                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 353                                               nrefs, nrtrrefs, alive_cnt,
 354                                               alive ? "up" : "down", last_ping,
 355                                               pingsent, "NA", down_ni,
 356                                               libcfs_nid2str(nid));
 357                         else
 358                                 s += snprintf(s, tmpstr + tmpsiz - s,
 359                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 360                                               nrefs, nrtrrefs, alive_cnt,
 361                                               alive ? "up" : "down", last_ping,
 362                                               pingsent,
 363                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 364                                               down_ni, libcfs_nid2str(nid));
 365                         LASSERT (tmpstr + tmpsiz - s > 0);
 366                 }
 367
 368                 lnet_net_unlock(0);
 369         }
 370
 371         len = s - tmpstr;     /* how many bytes was written */
 372
 373         if (len > *lenp) {    /* linux-supplied buffer is too small */
 374                 rc = -EINVAL;
 375         } else if (len > 0) { /* wrote something */
 376                 if (copy_to_user(buffer, tmpstr, len))
 377                         rc = -EFAULT;
 378                 else {
 379                         off += 1;
 380                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 381                 }
 382         }
 383
 384         LIBCFS_FREE(tmpstr, tmpsiz);
 385
 386         if (rc == 0)
 387                 *lenp = len;
 388
 389         return rc;
 390 }
 391
 392 int LL_PROC_PROTO(proc_lnet_peers)
 393 {
 394         const int               tmpsiz  = 256;
 395         struct lnet_peer_table  *ptable;
 396         char                    *tmpstr;
 397         char                    *s;
 398         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 399         int                     ver  = LNET_PROC_VER_GET(*ppos);
 400         int                     hash = LNET_PROC_HASH_GET(*ppos);
 401         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 402         int                     rc = 0;
 403         int                     len;
 404
 405         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 406         LASSERT(!write);
 407
 408         if (*lenp == 0)
 409                 return 0;
 410
 411         if (cpt >= LNET_CPT_NUMBER) {
 412                 *lenp = 0;
 413                 return 0;
 414         }
 415
 416         LIBCFS_ALLOC(tmpstr, tmpsiz);
 417         if (tmpstr == NULL)
 418                 return -ENOMEM;
 419
 420         s = tmpstr; /* points to current position in tmpstr[] */
 421
 422         if (*ppos == 0) {
 423                 s += snprintf(s, tmpstr + tmpsiz - s,
 424                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 425                               "nid", "refs", "state", "last", "max",
 426                               "rtr", "min", "tx", "min", "queue");
 427                 LASSERT (tmpstr + tmpsiz - s > 0);
 428
 429                 hoff++;
 430         } else {
 431                 struct lnet_peer        *peer;
 432                 struct list_head        *p;
 433                 int                     skip;
 434  again:
 435                 p = NULL;
 436                 peer = NULL;
 437                 skip = hoff - 1;
 438
 439                 lnet_net_lock(cpt);
 440                 ptable = the_lnet.ln_peer_tables[cpt];
 441                 if (hoff == 1)
 442                         ver = LNET_PROC_VERSION(ptable->pt_version);
 443
 444                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 445                         lnet_net_unlock(cpt);
 446                         LIBCFS_FREE(tmpstr, tmpsiz);
 447                         return -ESTALE;
 448                 }
 449
 450                 while (hash < LNET_PEER_HASH_SIZE) {
 451                         if (p == NULL)
 452                                 p = ptable->pt_hash[hash].next;
 453
 454                         while (p != &ptable->pt_hash[hash]) {
 455                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 456                                                              lp_hashlist);
 457                                 if (skip == 0) {
 458                                         peer = lp;
 459
 460                                         /* minor optimization: start from idx+1
 461                                          * on next iteration if we've just
 462                                          * drained lp_hashlist */
 463                                         if (lp->lp_hashlist.next ==
 464                                             &ptable->pt_hash[hash]) {
 465                                                 hoff = 1;
 466                                                 hash++;
 467                                         } else {
 468                                                 hoff++;
 469                                         }
 470
 471                                         break;
 472                                 }
 473
 474                                 skip--;
 475                                 p = lp->lp_hashlist.next;
 476                         }
 477
 478                         if (peer != NULL)
 479                                 break;
 480
 481                         p = NULL;
 482                         hoff = 1;
 483                         hash++;
 484                 }
 485
 486                 if (peer != NULL) {
 487                         lnet_nid_t nid       = peer->lp_nid;
 488                         int        nrefs     = peer->lp_refcount;
 489                         int        lastalive = -1;
 490                         char      *aliveness = "NA";
 491                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 492                         int        txcr      = peer->lp_txcredits;
 493                         int        mintxcr   = peer->lp_mintxcredits;
 494                         int        rtrcr     = peer->lp_rtrcredits;
 495                         int        minrtrcr  = peer->lp_minrtrcredits;
 496                         int        txqnob    = peer->lp_txqnob;
 497
 498                         if (lnet_isrouter(peer) ||
 499                             lnet_peer_aliveness_enabled(peer))
 500                                 aliveness = peer->lp_alive ? "up" : "down";
 501
 502                         if (lnet_peer_aliveness_enabled(peer)) {
 503                                 cfs_time_t     now = cfs_time_current();
 504                                 cfs_duration_t delta;
 505
 506                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 507                                 lastalive = cfs_duration_sec(delta);
 508
 509                                 /* No need to mess up peers contents with
 510                                  * arbitrarily long integers - it suffices to
 511                                  * know that lastalive is more than 10000s old
 512                                  */
 513                                 if (lastalive >= 10000)
 514                                         lastalive = 9999;
 515                         }
 516
 517                         lnet_net_unlock(cpt);
 518
 519                         s += snprintf(s, tmpstr + tmpsiz - s,
 520                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 521                                       libcfs_nid2str(nid), nrefs, aliveness,
 522                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 523                                       mintxcr, txqnob);
 524                         LASSERT (tmpstr + tmpsiz - s > 0);
 525
 526                 } else { /* peer is NULL */
 527                         lnet_net_unlock(cpt);
 528                 }
 529
 530                 if (hash == LNET_PEER_HASH_SIZE) {
 531                         cpt++;
 532                         hash = 0;
 533                         hoff = 1;
 534                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 535                                 goto again;
 536                 }
 537         }
 538
 539         len = s - tmpstr;     /* how many bytes was written */
 540
 541         if (len > *lenp) {    /* linux-supplied buffer is too small */
 542                 rc = -EINVAL;
 543         } else if (len > 0) { /* wrote something */
 544                 if (copy_to_user(buffer, tmpstr, len))
 545                         rc = -EFAULT;
 546                 else
 547                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 548         }
 549
 550         LIBCFS_FREE(tmpstr, tmpsiz);
 551
 552         if (rc == 0)
 553                 *lenp = len;
 554
 555         return rc;
 556 }
 557
 558 static int __proc_lnet_buffers(void *data, int write,
 559                                loff_t pos, void *buffer, int nob)
 560 {
 561         char            *s;
 562         char            *tmpstr;
 563         int             tmpsiz;
 564         int             idx;
 565         int             len;
 566         int             rc;
 567         int             i;
 568
 569         LASSERT(!write);
 570
 571         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 572         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 573         LIBCFS_ALLOC(tmpstr, tmpsiz);
 574         if (tmpstr == NULL)
 575                 return -ENOMEM;
 576
 577         s = tmpstr; /* points to current position in tmpstr[] */
 578
 579         s += snprintf(s, tmpstr + tmpsiz - s,
 580                       "%5s %5s %7s %7s\n",
 581                       "pages", "count", "credits", "min");
 582         LASSERT (tmpstr + tmpsiz - s > 0);
 583
 584         if (the_lnet.ln_rtrpools == NULL)
 585                 goto out; /* I'm not a router */
 586
 587         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 588                 lnet_rtrbufpool_t *rbp;
 589
 590                 lnet_net_lock(LNET_LOCK_EX);
 591                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 592                         s += snprintf(s, tmpstr + tmpsiz - s,
 593                                       "%5d %5d %7d %7d\n",
 594                                       rbp[idx].rbp_npages,
 595                                       rbp[idx].rbp_nbuffers,
 596                                       rbp[idx].rbp_credits,
 597                                       rbp[idx].rbp_mincredits);
 598                         LASSERT(tmpstr + tmpsiz - s > 0);
 599                 }
 600                 lnet_net_unlock(LNET_LOCK_EX);
 601         }
 602
 603  out:
 604         len = s - tmpstr;
 605
 606         if (pos >= min_t(int, len, strlen(tmpstr)))
 607                 rc = 0;
 608         else
 609                 rc = cfs_trace_copyout_string(buffer, nob,
 610                                               tmpstr + pos, NULL);
 611
 612         LIBCFS_FREE(tmpstr, tmpsiz);
 613         return rc;
 614 }
 615
 616 DECLARE_PROC_HANDLER(proc_lnet_buffers);
 617
 618 int LL_PROC_PROTO(proc_lnet_nis)
 619 {
 620         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 621         int        rc = 0;
 622         char      *tmpstr;
 623         char      *s;
 624         int        len;
 625
 626         LASSERT (!write);
 627
 628         if (*lenp == 0)
 629                 return 0;
 630
 631         LIBCFS_ALLOC(tmpstr, tmpsiz);
 632         if (tmpstr == NULL)
 633                 return -ENOMEM;
 634
 635         s = tmpstr; /* points to current position in tmpstr[] */
 636
 637         if (*ppos == 0) {
 638                 s += snprintf(s, tmpstr + tmpsiz - s,
 639                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 640                               "nid", "status", "alive", "refs", "peer",
 641                               "rtr", "max", "tx", "min");
 642                 LASSERT (tmpstr + tmpsiz - s > 0);
 643         } else {
 644                 struct list_head  *n;
 645                 lnet_ni_t         *ni   = NULL;
 646                 int                skip = *ppos - 1;
 647
 648                 lnet_net_lock(0);
 649
 650                 n = the_lnet.ln_nis.next;
 651
 652                 while (n != &the_lnet.ln_nis) {
 653                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 654
 655                         if (skip == 0) {
 656                                 ni = a_ni;
 657                                 break;
 658                         }
 659
 660                         skip--;
 661                         n = n->next;
 662                 }
 663
 664                 if (ni != NULL) {
 665                         struct lnet_tx_queue    *tq;
 666                         char    *stat;
 667                         long    now = cfs_time_current_sec();
 668                         int     last_alive = -1;
 669                         int     i;
 670                         int     j;
 671
 672                         if (the_lnet.ln_routing)
 673                                 last_alive = now - ni->ni_last_alive;
 674
 675                         /* @lo forever alive */
 676                         if (ni->ni_lnd->lnd_type == LOLND)
 677                                 last_alive = 0;
 678
 679                         lnet_ni_lock(ni);
 680                         LASSERT(ni->ni_status != NULL);
 681                         stat = (ni->ni_status->ns_status ==
 682                                 LNET_NI_STATUS_UP) ? "up" : "down";
 683                         lnet_ni_unlock(ni);
 684
 685                         /* we actually output credits information for
 686                          * TX queue of each partition */
 687                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 688                                 for (j = 0; ni->ni_cpts != NULL &&
 689                                      j < ni->ni_ncpts; j++) {
 690                                         if (i == ni->ni_cpts[j])
 691                                                 break;
 692                                 }
 693
 694                                 if (j == ni->ni_ncpts)
 695                                         continue;
 696
 697                                 if (i != 0)
 698                                         lnet_net_lock(i);
 699
 700                                 s += snprintf(s, tmpstr + tmpsiz - s,
 701                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 702                                       libcfs_nid2str(ni->ni_nid), stat,
 703                                       last_alive, *ni->ni_refs[i],
 704                                       ni->ni_peertxcredits,
 705                                       ni->ni_peerrtrcredits,
 706                                       tq->tq_credits_max,
 707                                       tq->tq_credits, tq->tq_credits_min);
 708                                 if (i != 0)
 709                                         lnet_net_unlock(i);
 710                         }
 711                         LASSERT(tmpstr + tmpsiz - s > 0);
 712                 }
 713
 714                 lnet_net_unlock(0);
 715         }
 716
 717         len = s - tmpstr;     /* how many bytes was written */
 718
 719         if (len > *lenp) {    /* linux-supplied buffer is too small */
 720                 rc = -EINVAL;
 721         } else if (len > 0) { /* wrote something */
 722                 if (copy_to_user(buffer, tmpstr, len))
 723                         rc = -EFAULT;
 724                 else
 725                         *ppos += 1;
 726         }
 727
 728         LIBCFS_FREE(tmpstr, tmpsiz);
 729
 730         if (rc == 0)
 731                 *lenp = len;
 732
 733         return rc;
 734 }
 735
 736 struct lnet_portal_rotors {
 737         int             pr_value;
 738         const char      *pr_name;
 739         const char      *pr_desc;
 740 };
 741
 742 static struct lnet_portal_rotors        portal_rotors[] = {
 743         {
 744                 .pr_value = LNET_PTL_ROTOR_OFF,
 745                 .pr_name  = "OFF",
 746                 .pr_desc  = "Turn off message rotor for wildcard portals"
 747         },
 748         {
 749                 .pr_value = LNET_PTL_ROTOR_ON,
 750                 .pr_name  = "ON",
 751                 .pr_desc  = "round-robin dispatch all PUT messages for "
 752                             "wildcard portals"
 753         },
 754         {
 755                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 756                 .pr_name  = "RR_RT",
 757                 .pr_desc  = "round-robin dispatch routed PUT message for "
 758                             "wildcard portals"
 759         },
 760         {
 761                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 762                 .pr_name  = "HASH_RT",
 763                 .pr_desc  = "dispatch routed PUT message by hashing source "
 764                             "NID for wildcard portals"
 765         },
 766         {
 767                 .pr_value = -1,
 768                 .pr_name  = NULL,
 769                 .pr_desc  = NULL
 770         },
 771 };
 772
 773 extern int portal_rotor;
 774
 775 static int __proc_lnet_portal_rotor(void *data, int write,
 776                                     loff_t pos, void *buffer, int nob)
 777 {
 778         const int       buf_len = 128;
 779         char            *buf;
 780         char            *tmp;
 781         int             rc;
 782         int             i;
 783
 784         LIBCFS_ALLOC(buf, buf_len);
 785         if (buf == NULL)
 786                 return -ENOMEM;
 787
 788         if (!write) {
 789                 lnet_res_lock(0);
 790
 791                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 792                         if (portal_rotors[i].pr_value == portal_rotor)
 793                                 break;
 794                 }
 795
 796                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 797                 lnet_res_unlock(0);
 798
 799                 rc = snprintf(buf, buf_len,
 800                               "{\n\tportals: all\n"
 801                               "\trotor: %s\n\tdescription: %s\n}",
 802                               portal_rotors[i].pr_name,
 803                               portal_rotors[i].pr_desc);
 804
 805                 if (pos >= min_t(int, rc, buf_len)) {
 806                         rc = 0;
 807                 } else {
 808                         rc = cfs_trace_copyout_string(buffer, nob,
 809                                         buf + pos, "\n");
 810                 }
 811                 goto out;
 812         }
 813
 814         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 815         if (rc < 0)
 816                 goto out;
 817
 818         tmp = cfs_trimwhite(buf);
 819
 820         rc = -EINVAL;
 821         lnet_res_lock(0);
 822         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 823                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 824                                     strlen(portal_rotors[i].pr_name)) == 0) {
 825                         portal_rotor = portal_rotors[i].pr_value;
 826                         rc = 0;
 827                         break;
 828                 }
 829         }
 830         lnet_res_unlock(0);
 831 out:
 832         LIBCFS_FREE(buf, buf_len);
 833         return rc;
 834 }
 835 DECLARE_PROC_HANDLER(proc_lnet_portal_rotor);
 836
 837 static struct ctl_table lnet_table[] = {
 838         /*
 839          * NB No .strategy entries have been provided since sysctl(8) prefers
 840          * to go via /proc for portability.
 841          */
 842         {
 843                 INIT_CTL_NAME
 844                 .procname       = "stats",
 845                 .mode           = 0644,
 846                 .proc_handler   = &proc_lnet_stats,
 847         },
 848         {
 849                 INIT_CTL_NAME
 850                 .procname       = "routes",
 851                 .mode           = 0444,
 852                 .proc_handler   = &proc_lnet_routes,
 853         },
 854         {
 855                 INIT_CTL_NAME
 856                 .procname       = "routers",
 857                 .mode           = 0444,
 858                 .proc_handler   = &proc_lnet_routers,
 859         },
 860         {
 861                 INIT_CTL_NAME
 862                 .procname       = "peers",
 863                 .mode           = 0444,
 864                 .proc_handler   = &proc_lnet_peers,
 865         },
 866         {
 867                 INIT_CTL_NAME
 868                 .procname       = "buffers",
 869                 .mode           = 0444,
 870                 .proc_handler   = &proc_lnet_buffers,
 871         },
 872         {
 873                 INIT_CTL_NAME
 874                 .procname       = "nis",
 875                 .mode           = 0444,
 876                 .proc_handler   = &proc_lnet_nis,
 877         },
 878         {
 879                 INIT_CTL_NAME
 880                 .procname       = "portal_rotor",
 881                 .mode           = 0644,
 882                 .proc_handler   = &proc_lnet_portal_rotor,
 883         },
 884         { 0 }
 885 };
 886
 887 static struct ctl_table top_table[] = {
 888         {
 889                 INIT_CTL_NAME
 890                 .procname       = "lnet",
 891                 .mode           = 0555,
 892                 .data           = NULL,
 893                 .maxlen         = 0,
 894                 .child          = lnet_table,
 895         },
 896         { 0 }
 897 };
 898
 899 void
 900 lnet_proc_init(void)
 901 {
 902 #ifdef CONFIG_SYSCTL
 903         if (lnet_table_header == NULL)
 904                 lnet_table_header = register_sysctl_table(top_table);
 905 #endif
 906 }
 907
 908 void
 909 lnet_proc_fini(void)
 910 {
 911 #ifdef CONFIG_SYSCTL
 912         if (lnet_table_header != NULL)
 913                 unregister_sysctl_table(lnet_table_header);
 914
 915         lnet_table_header = NULL;
 916 #endif
 917 }
 918
 919 #else
 920
 921 void
 922 lnet_proc_init(void)
 923 {
 924 }
 925
 926 void
 927 lnet_proc_fini(void)
 928 {
 929 }
 930
 931 #endif