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 __user *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 static int
 132 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 133                 size_t *lenp, loff_t *ppos)
 134 {
 135         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 136                                     __proc_lnet_stats);
 137 }
 138
 139 static int
 140 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 141                  size_t *lenp, loff_t *ppos)
 142 {
 143         const int       tmpsiz = 256;
 144         char            *tmpstr;
 145         char            *s;
 146         int             rc = 0;
 147         int             len;
 148         int             ver;
 149         int             off;
 150
 151         CLASSERT(sizeof(loff_t) >= 4);
 152
 153         off = LNET_PROC_HOFF_GET(*ppos);
 154         ver = LNET_PROC_VER_GET(*ppos);
 155
 156         LASSERT (!write);
 157
 158         if (*lenp == 0)
 159                 return 0;
 160
 161         LIBCFS_ALLOC(tmpstr, tmpsiz);
 162         if (tmpstr == NULL)
 163                 return -ENOMEM;
 164
 165         s = tmpstr; /* points to current position in tmpstr[] */
 166
 167         if (*ppos == 0) {
 168                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 169                               the_lnet.ln_routing ? "enabled" : "disabled");
 170                 LASSERT (tmpstr + tmpsiz - s > 0);
 171
 172                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 173                               "net", "hops", "priority", "state", "router");
 174                 LASSERT (tmpstr + tmpsiz - s > 0);
 175
 176                 lnet_net_lock(0);
 177                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 178                 lnet_net_unlock(0);
 179                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 180         } else {
 181                 struct list_head        *n;
 182                 struct list_head        *r;
 183                 lnet_route_t            *route = NULL;
 184                 lnet_remotenet_t        *rnet  = NULL;
 185                 int                     skip  = off - 1;
 186                 struct list_head        *rn_list;
 187                 int                     i;
 188
 189                 lnet_net_lock(0);
 190
 191                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 192                         lnet_net_unlock(0);
 193                         LIBCFS_FREE(tmpstr, tmpsiz);
 194                         return -ESTALE;
 195                 }
 196
 197                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 198                      i++) {
 199                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 200
 201                         n = rn_list->next;
 202
 203                         while (n != rn_list && route == NULL) {
 204                                 rnet = list_entry(n, lnet_remotenet_t,
 205                                                   lrn_list);
 206
 207                                 r = rnet->lrn_routes.next;
 208
 209                                 while (r != &rnet->lrn_routes) {
 210                                         lnet_route_t *re =
 211                                                 list_entry(r, lnet_route_t,
 212                                                            lr_list);
 213                                         if (skip == 0) {
 214                                                 route = re;
 215                                                 break;
 216                                         }
 217
 218                                         skip--;
 219                                         r = r->next;
 220                                 }
 221
 222                                 n = n->next;
 223                         }
 224                 }
 225
 226                 if (route != NULL) {
 227                         __u32        net        = rnet->lrn_net;
 228                         unsigned int hops       = route->lr_hops;
 229                         unsigned int priority   = route->lr_priority;
 230                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 231                         int          alive      = lnet_is_route_alive(route);
 232
 233                         s += snprintf(s, tmpstr + tmpsiz - s,
 234                                       "%-8s %4u %8u %7s %s\n",
 235                                       libcfs_net2str(net), hops,
 236                                       priority,
 237                                       alive ? "up" : "down",
 238                                       libcfs_nid2str(nid));
 239                         LASSERT(tmpstr + tmpsiz - s > 0);
 240                 }
 241
 242                 lnet_net_unlock(0);
 243         }
 244
 245         len = s - tmpstr;     /* how many bytes was written */
 246
 247         if (len > *lenp) {    /* linux-supplied buffer is too small */
 248                 rc = -EINVAL;
 249         } else if (len > 0) { /* wrote something */
 250                 if (copy_to_user(buffer, tmpstr, len))
 251                         rc = -EFAULT;
 252                 else {
 253                         off += 1;
 254                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 255                 }
 256         }
 257
 258         LIBCFS_FREE(tmpstr, tmpsiz);
 259
 260         if (rc == 0)
 261                 *lenp = len;
 262
 263         return rc;
 264 }
 265
 266 static int
 267 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 268                   size_t *lenp, loff_t *ppos)
 269 {
 270         int        rc = 0;
 271         char      *tmpstr;
 272         char      *s;
 273         const int  tmpsiz = 256;
 274         int        len;
 275         int        ver;
 276         int        off;
 277
 278         off = LNET_PROC_HOFF_GET(*ppos);
 279         ver = LNET_PROC_VER_GET(*ppos);
 280
 281         LASSERT (!write);
 282
 283         if (*lenp == 0)
 284                 return 0;
 285
 286         LIBCFS_ALLOC(tmpstr, tmpsiz);
 287         if (tmpstr == NULL)
 288                 return -ENOMEM;
 289
 290         s = tmpstr; /* points to current position in tmpstr[] */
 291
 292         if (*ppos == 0) {
 293                 s += snprintf(s, tmpstr + tmpsiz - s,
 294                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 295                               "ref", "rtr_ref", "alive_cnt", "state",
 296                               "last_ping", "ping_sent", "deadline",
 297                               "down_ni", "router");
 298                 LASSERT(tmpstr + tmpsiz - s > 0);
 299
 300                 lnet_net_lock(0);
 301                 ver = (unsigned int)the_lnet.ln_routers_version;
 302                 lnet_net_unlock(0);
 303                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 304         } else {
 305                 struct list_head *r;
 306                 struct lnet_peer *peer = NULL;
 307                 int               skip = off - 1;
 308
 309                 lnet_net_lock(0);
 310
 311                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 312                         lnet_net_unlock(0);
 313
 314                         LIBCFS_FREE(tmpstr, tmpsiz);
 315                         return -ESTALE;
 316                 }
 317
 318                 r = the_lnet.ln_routers.next;
 319
 320                 while (r != &the_lnet.ln_routers) {
 321                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 322                                                      lp_rtr_list);
 323
 324                         if (skip == 0) {
 325                                 peer = lp;
 326                                 break;
 327                         }
 328
 329                         skip--;
 330                         r = r->next;
 331                 }
 332
 333                 if (peer != NULL) {
 334                         lnet_nid_t nid = peer->lp_nid;
 335                         cfs_time_t now = cfs_time_current();
 336                         cfs_time_t deadline = peer->lp_ping_deadline;
 337                         int nrefs     = peer->lp_refcount;
 338                         int nrtrrefs  = peer->lp_rtr_refcount;
 339                         int alive_cnt = peer->lp_alive_count;
 340                         int alive     = peer->lp_alive;
 341                         int pingsent  = !peer->lp_ping_notsent;
 342                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 343                                                      peer->lp_ping_timestamp));
 344                         int down_ni   = 0;
 345                         lnet_route_t *rtr;
 346
 347                         if ((peer->lp_ping_feats &
 348                              LNET_PING_FEAT_NI_STATUS) != 0) {
 349                                 list_for_each_entry(rtr, &peer->lp_routes,
 350                                                     lr_gwlist) {
 351                                         /* downis on any route should be the
 352                                          * number of downis on the gateway */
 353                                         if (rtr->lr_downis != 0) {
 354                                                 down_ni = rtr->lr_downis;
 355                                                 break;
 356                                         }
 357                                 }
 358                         }
 359
 360                         if (deadline == 0)
 361                                 s += snprintf(s, tmpstr + tmpsiz - s,
 362                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 363                                               nrefs, nrtrrefs, alive_cnt,
 364                                               alive ? "up" : "down", last_ping,
 365                                               pingsent, "NA", down_ni,
 366                                               libcfs_nid2str(nid));
 367                         else
 368                                 s += snprintf(s, tmpstr + tmpsiz - s,
 369                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 370                                               nrefs, nrtrrefs, alive_cnt,
 371                                               alive ? "up" : "down", last_ping,
 372                                               pingsent,
 373                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 374                                               down_ni, libcfs_nid2str(nid));
 375                         LASSERT (tmpstr + tmpsiz - s > 0);
 376                 }
 377
 378                 lnet_net_unlock(0);
 379         }
 380
 381         len = s - tmpstr;     /* how many bytes was written */
 382
 383         if (len > *lenp) {    /* linux-supplied buffer is too small */
 384                 rc = -EINVAL;
 385         } else if (len > 0) { /* wrote something */
 386                 if (copy_to_user(buffer, tmpstr, len))
 387                         rc = -EFAULT;
 388                 else {
 389                         off += 1;
 390                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 391                 }
 392         }
 393
 394         LIBCFS_FREE(tmpstr, tmpsiz);
 395
 396         if (rc == 0)
 397                 *lenp = len;
 398
 399         return rc;
 400 }
 401
 402 static int
 403 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 404                 size_t *lenp, loff_t *ppos)
 405 {
 406         const int               tmpsiz  = 256;
 407         struct lnet_peer_table  *ptable;
 408         char                    *tmpstr;
 409         char                    *s;
 410         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 411         int                     ver  = LNET_PROC_VER_GET(*ppos);
 412         int                     hash = LNET_PROC_HASH_GET(*ppos);
 413         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 414         int                     rc = 0;
 415         int                     len;
 416
 417         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 418         LASSERT(!write);
 419
 420         if (*lenp == 0)
 421                 return 0;
 422
 423         if (cpt >= LNET_CPT_NUMBER) {
 424                 *lenp = 0;
 425                 return 0;
 426         }
 427
 428         LIBCFS_ALLOC(tmpstr, tmpsiz);
 429         if (tmpstr == NULL)
 430                 return -ENOMEM;
 431
 432         s = tmpstr; /* points to current position in tmpstr[] */
 433
 434         if (*ppos == 0) {
 435                 s += snprintf(s, tmpstr + tmpsiz - s,
 436                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 437                               "nid", "refs", "state", "last", "max",
 438                               "rtr", "min", "tx", "min", "queue");
 439                 LASSERT (tmpstr + tmpsiz - s > 0);
 440
 441                 hoff++;
 442         } else {
 443                 struct lnet_peer        *peer;
 444                 struct list_head        *p;
 445                 int                     skip;
 446  again:
 447                 p = NULL;
 448                 peer = NULL;
 449                 skip = hoff - 1;
 450
 451                 lnet_net_lock(cpt);
 452                 ptable = the_lnet.ln_peer_tables[cpt];
 453                 if (hoff == 1)
 454                         ver = LNET_PROC_VERSION(ptable->pt_version);
 455
 456                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 457                         lnet_net_unlock(cpt);
 458                         LIBCFS_FREE(tmpstr, tmpsiz);
 459                         return -ESTALE;
 460                 }
 461
 462                 while (hash < LNET_PEER_HASH_SIZE) {
 463                         if (p == NULL)
 464                                 p = ptable->pt_hash[hash].next;
 465
 466                         while (p != &ptable->pt_hash[hash]) {
 467                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 468                                                              lp_hashlist);
 469                                 if (skip == 0) {
 470                                         peer = lp;
 471
 472                                         /* minor optimization: start from idx+1
 473                                          * on next iteration if we've just
 474                                          * drained lp_hashlist */
 475                                         if (lp->lp_hashlist.next ==
 476                                             &ptable->pt_hash[hash]) {
 477                                                 hoff = 1;
 478                                                 hash++;
 479                                         } else {
 480                                                 hoff++;
 481                                         }
 482
 483                                         break;
 484                                 }
 485
 486                                 skip--;
 487                                 p = lp->lp_hashlist.next;
 488                         }
 489
 490                         if (peer != NULL)
 491                                 break;
 492
 493                         p = NULL;
 494                         hoff = 1;
 495                         hash++;
 496                 }
 497
 498                 if (peer != NULL) {
 499                         lnet_nid_t nid       = peer->lp_nid;
 500                         int        nrefs     = peer->lp_refcount;
 501                         int        lastalive = -1;
 502                         char      *aliveness = "NA";
 503                         int        maxcr     = peer->lp_ni->ni_peertxcredits;
 504                         int        txcr      = peer->lp_txcredits;
 505                         int        mintxcr   = peer->lp_mintxcredits;
 506                         int        rtrcr     = peer->lp_rtrcredits;
 507                         int        minrtrcr  = peer->lp_minrtrcredits;
 508                         int        txqnob    = peer->lp_txqnob;
 509
 510                         if (lnet_peer_aliveness_enabled(peer)) {
 511                                 cfs_time_t     now = cfs_time_current();
 512                                 cfs_duration_t delta;
 513
 514                                 aliveness = peer->lp_alive ? "up" : "down";
 515                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 516                                 lastalive = cfs_duration_sec(delta);
 517
 518                                 /* No need to mess up peers contents with
 519                                  * arbitrarily long integers - it suffices to
 520                                  * know that lastalive is more than 10000s old
 521                                  */
 522                                 if (lastalive >= 10000)
 523                                         lastalive = 9999;
 524                         }
 525
 526                         lnet_net_unlock(cpt);
 527
 528                         s += snprintf(s, tmpstr + tmpsiz - s,
 529                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 530                                       libcfs_nid2str(nid), nrefs, aliveness,
 531                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 532                                       mintxcr, txqnob);
 533                         LASSERT (tmpstr + tmpsiz - s > 0);
 534
 535                 } else { /* peer is NULL */
 536                         lnet_net_unlock(cpt);
 537                 }
 538
 539                 if (hash == LNET_PEER_HASH_SIZE) {
 540                         cpt++;
 541                         hash = 0;
 542                         hoff = 1;
 543                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 544                                 goto again;
 545                 }
 546         }
 547
 548         len = s - tmpstr;     /* how many bytes was written */
 549
 550         if (len > *lenp) {    /* linux-supplied buffer is too small */
 551                 rc = -EINVAL;
 552         } else if (len > 0) { /* wrote something */
 553                 if (copy_to_user(buffer, tmpstr, len))
 554                         rc = -EFAULT;
 555                 else
 556                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 557         }
 558
 559         LIBCFS_FREE(tmpstr, tmpsiz);
 560
 561         if (rc == 0)
 562                 *lenp = len;
 563
 564         return rc;
 565 }
 566
 567 static int __proc_lnet_buffers(void *data, int write,
 568                                loff_t pos, void __user *buffer, int nob)
 569 {
 570         char            *s;
 571         char            *tmpstr;
 572         int             tmpsiz;
 573         int             idx;
 574         int             len;
 575         int             rc;
 576         int             i;
 577
 578         LASSERT(!write);
 579
 580         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 581         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 582         LIBCFS_ALLOC(tmpstr, tmpsiz);
 583         if (tmpstr == NULL)
 584                 return -ENOMEM;
 585
 586         s = tmpstr; /* points to current position in tmpstr[] */
 587
 588         s += snprintf(s, tmpstr + tmpsiz - s,
 589                       "%5s %5s %7s %7s\n",
 590                       "pages", "count", "credits", "min");
 591         LASSERT (tmpstr + tmpsiz - s > 0);
 592
 593         if (the_lnet.ln_rtrpools == NULL)
 594                 goto out; /* I'm not a router */
 595
 596         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 597                 lnet_rtrbufpool_t *rbp;
 598
 599                 lnet_net_lock(LNET_LOCK_EX);
 600                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 601                         s += snprintf(s, tmpstr + tmpsiz - s,
 602                                       "%5d %5d %7d %7d\n",
 603                                       rbp[idx].rbp_npages,
 604                                       rbp[idx].rbp_nbuffers,
 605                                       rbp[idx].rbp_credits,
 606                                       rbp[idx].rbp_mincredits);
 607                         LASSERT(tmpstr + tmpsiz - s > 0);
 608                 }
 609                 lnet_net_unlock(LNET_LOCK_EX);
 610         }
 611
 612  out:
 613         len = s - tmpstr;
 614
 615         if (pos >= min_t(int, len, strlen(tmpstr)))
 616                 rc = 0;
 617         else
 618                 rc = cfs_trace_copyout_string(buffer, nob,
 619                                               tmpstr + pos, NULL);
 620
 621         LIBCFS_FREE(tmpstr, tmpsiz);
 622         return rc;
 623 }
 624
 625 static int
 626 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 627                   size_t *lenp, loff_t *ppos)
 628 {
 629         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 630                                     __proc_lnet_buffers);
 631 }
 632
 633 static int
 634 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 635               size_t *lenp, loff_t *ppos)
 636 {
 637         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 638         int        rc = 0;
 639         char      *tmpstr;
 640         char      *s;
 641         int        len;
 642
 643         LASSERT (!write);
 644
 645         if (*lenp == 0)
 646                 return 0;
 647
 648         LIBCFS_ALLOC(tmpstr, tmpsiz);
 649         if (tmpstr == NULL)
 650                 return -ENOMEM;
 651
 652         s = tmpstr; /* points to current position in tmpstr[] */
 653
 654         if (*ppos == 0) {
 655                 s += snprintf(s, tmpstr + tmpsiz - s,
 656                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 657                               "nid", "status", "alive", "refs", "peer",
 658                               "rtr", "max", "tx", "min");
 659                 LASSERT (tmpstr + tmpsiz - s > 0);
 660         } else {
 661                 struct list_head  *n;
 662                 lnet_ni_t         *ni   = NULL;
 663                 int                skip = *ppos - 1;
 664
 665                 lnet_net_lock(0);
 666
 667                 n = the_lnet.ln_nis.next;
 668
 669                 while (n != &the_lnet.ln_nis) {
 670                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 671
 672                         if (skip == 0) {
 673                                 ni = a_ni;
 674                                 break;
 675                         }
 676
 677                         skip--;
 678                         n = n->next;
 679                 }
 680
 681                 if (ni != NULL) {
 682                         struct lnet_tx_queue    *tq;
 683                         char    *stat;
 684                         long    now = cfs_time_current_sec();
 685                         int     last_alive = -1;
 686                         int     i;
 687                         int     j;
 688
 689                         if (the_lnet.ln_routing)
 690                                 last_alive = now - ni->ni_last_alive;
 691
 692                         /* @lo forever alive */
 693                         if (ni->ni_lnd->lnd_type == LOLND)
 694                                 last_alive = 0;
 695
 696                         lnet_ni_lock(ni);
 697                         LASSERT(ni->ni_status != NULL);
 698                         stat = (ni->ni_status->ns_status ==
 699                                 LNET_NI_STATUS_UP) ? "up" : "down";
 700                         lnet_ni_unlock(ni);
 701
 702                         /* we actually output credits information for
 703                          * TX queue of each partition */
 704                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 705                                 for (j = 0; ni->ni_cpts != NULL &&
 706                                      j < ni->ni_ncpts; j++) {
 707                                         if (i == ni->ni_cpts[j])
 708                                                 break;
 709                                 }
 710
 711                                 if (j == ni->ni_ncpts)
 712                                         continue;
 713
 714                                 if (i != 0)
 715                                         lnet_net_lock(i);
 716
 717                                 s += snprintf(s, tmpstr + tmpsiz - s,
 718                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 719                                       libcfs_nid2str(ni->ni_nid), stat,
 720                                       last_alive, *ni->ni_refs[i],
 721                                       ni->ni_peertxcredits,
 722                                       ni->ni_peerrtrcredits,
 723                                       tq->tq_credits_max,
 724                                       tq->tq_credits, tq->tq_credits_min);
 725                                 if (i != 0)
 726                                         lnet_net_unlock(i);
 727                         }
 728                         LASSERT(tmpstr + tmpsiz - s > 0);
 729                 }
 730
 731                 lnet_net_unlock(0);
 732         }
 733
 734         len = s - tmpstr;     /* how many bytes was written */
 735
 736         if (len > *lenp) {    /* linux-supplied buffer is too small */
 737                 rc = -EINVAL;
 738         } else if (len > 0) { /* wrote something */
 739                 if (copy_to_user(buffer, tmpstr, len))
 740                         rc = -EFAULT;
 741                 else
 742                         *ppos += 1;
 743         }
 744
 745         LIBCFS_FREE(tmpstr, tmpsiz);
 746
 747         if (rc == 0)
 748                 *lenp = len;
 749
 750         return rc;
 751 }
 752
 753 struct lnet_portal_rotors {
 754         int             pr_value;
 755         const char      *pr_name;
 756         const char      *pr_desc;
 757 };
 758
 759 static struct lnet_portal_rotors        portal_rotors[] = {
 760         {
 761                 .pr_value = LNET_PTL_ROTOR_OFF,
 762                 .pr_name  = "OFF",
 763                 .pr_desc  = "Turn off message rotor for wildcard portals"
 764         },
 765         {
 766                 .pr_value = LNET_PTL_ROTOR_ON,
 767                 .pr_name  = "ON",
 768                 .pr_desc  = "round-robin dispatch all PUT messages for "
 769                             "wildcard portals"
 770         },
 771         {
 772                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 773                 .pr_name  = "RR_RT",
 774                 .pr_desc  = "round-robin dispatch routed PUT message for "
 775                             "wildcard portals"
 776         },
 777         {
 778                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 779                 .pr_name  = "HASH_RT",
 780                 .pr_desc  = "dispatch routed PUT message by hashing source "
 781                             "NID for wildcard portals"
 782         },
 783         {
 784                 .pr_value = -1,
 785                 .pr_name  = NULL,
 786                 .pr_desc  = NULL
 787         },
 788 };
 789
 790 extern int portal_rotor;
 791
 792 static int __proc_lnet_portal_rotor(void *data, int write,
 793                                     loff_t pos, void __user *buffer, int nob)
 794 {
 795         const int       buf_len = 128;
 796         char            *buf;
 797         char            *tmp;
 798         int             rc;
 799         int             i;
 800
 801         LIBCFS_ALLOC(buf, buf_len);
 802         if (buf == NULL)
 803                 return -ENOMEM;
 804
 805         if (!write) {
 806                 lnet_res_lock(0);
 807
 808                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 809                         if (portal_rotors[i].pr_value == portal_rotor)
 810                                 break;
 811                 }
 812
 813                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 814                 lnet_res_unlock(0);
 815
 816                 rc = snprintf(buf, buf_len,
 817                               "{\n\tportals: all\n"
 818                               "\trotor: %s\n\tdescription: %s\n}",
 819                               portal_rotors[i].pr_name,
 820                               portal_rotors[i].pr_desc);
 821
 822                 if (pos >= min_t(int, rc, buf_len)) {
 823                         rc = 0;
 824                 } else {
 825                         rc = cfs_trace_copyout_string(buffer, nob,
 826                                         buf + pos, "\n");
 827                 }
 828                 goto out;
 829         }
 830
 831         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 832         if (rc < 0)
 833                 goto out;
 834
 835         tmp = cfs_trimwhite(buf);
 836
 837         rc = -EINVAL;
 838         lnet_res_lock(0);
 839         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 840                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 841                                 strlen(portal_rotors[i].pr_name)) == 0) {
 842                         portal_rotor = portal_rotors[i].pr_value;
 843                         rc = 0;
 844                         break;
 845                 }
 846         }
 847         lnet_res_unlock(0);
 848 out:
 849         LIBCFS_FREE(buf, buf_len);
 850         return rc;
 851 }
 852
 853 static int
 854 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 855                        size_t *lenp, loff_t *ppos)
 856 {
 857         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 858                                     __proc_lnet_portal_rotor);
 859 }
 860
 861
 862 static struct ctl_table lnet_table[] = {
 863         /*
 864          * NB No .strategy entries have been provided since sysctl(8) prefers
 865          * to go via /proc for portability.
 866          */
 867         {
 868                 INIT_CTL_NAME
 869                 .procname       = "stats",
 870                 .mode           = 0644,
 871                 .proc_handler   = &proc_lnet_stats,
 872         },
 873         {
 874                 INIT_CTL_NAME
 875                 .procname       = "routes",
 876                 .mode           = 0444,
 877                 .proc_handler   = &proc_lnet_routes,
 878         },
 879         {
 880                 INIT_CTL_NAME
 881                 .procname       = "routers",
 882                 .mode           = 0444,
 883                 .proc_handler   = &proc_lnet_routers,
 884         },
 885         {
 886                 INIT_CTL_NAME
 887                 .procname       = "peers",
 888                 .mode           = 0444,
 889                 .proc_handler   = &proc_lnet_peers,
 890         },
 891         {
 892                 INIT_CTL_NAME
 893                 .procname       = "buffers",
 894                 .mode           = 0444,
 895                 .proc_handler   = &proc_lnet_buffers,
 896         },
 897         {
 898                 INIT_CTL_NAME
 899                 .procname       = "nis",
 900                 .mode           = 0444,
 901                 .proc_handler   = &proc_lnet_nis,
 902         },
 903         {
 904                 INIT_CTL_NAME
 905                 .procname       = "portal_rotor",
 906                 .mode           = 0644,
 907                 .proc_handler   = &proc_lnet_portal_rotor,
 908         },
 909         { 0 }
 910 };
 911
 912 static struct ctl_table top_table[] = {
 913         {
 914                 INIT_CTL_NAME
 915                 .procname       = "lnet",
 916                 .mode           = 0555,
 917                 .data           = NULL,
 918                 .maxlen         = 0,
 919                 .child          = lnet_table,
 920         },
 921         { 0 }
 922 };
 923
 924 void
 925 lnet_proc_init(void)
 926 {
 927 #ifdef CONFIG_SYSCTL
 928         if (lnet_table_header == NULL)
 929                 lnet_table_header = register_sysctl_table(top_table);
 930 #endif
 931 }
 932
 933 void
 934 lnet_proc_fini(void)
 935 {
 936 #ifdef CONFIG_SYSCTL
 937         if (lnet_table_header != NULL)
 938                 unregister_sysctl_table(lnet_table_header);
 939
 940         lnet_table_header = NULL;
 941 #endif
 942 }
 943
 944 #else
 945
 946 void
 947 lnet_proc_init(void)
 948 {
 949 }
 950
 951 void
 952 lnet_proc_fini(void)
 953 {
 954 }
 955
 956 #endif