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_isrouter(peer) ||
 511                             lnet_peer_aliveness_enabled(peer))
 512                                 aliveness = peer->lp_alive ? "up" : "down";
 513
 514                         if (lnet_peer_aliveness_enabled(peer)) {
 515                                 cfs_time_t     now = cfs_time_current();
 516                                 cfs_duration_t delta;
 517
 518                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 519                                 lastalive = cfs_duration_sec(delta);
 520
 521                                 /* No need to mess up peers contents with
 522                                  * arbitrarily long integers - it suffices to
 523                                  * know that lastalive is more than 10000s old
 524                                  */
 525                                 if (lastalive >= 10000)
 526                                         lastalive = 9999;
 527                         }
 528
 529                         lnet_net_unlock(cpt);
 530
 531                         s += snprintf(s, tmpstr + tmpsiz - s,
 532                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 533                                       libcfs_nid2str(nid), nrefs, aliveness,
 534                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 535                                       mintxcr, txqnob);
 536                         LASSERT (tmpstr + tmpsiz - s > 0);
 537
 538                 } else { /* peer is NULL */
 539                         lnet_net_unlock(cpt);
 540                 }
 541
 542                 if (hash == LNET_PEER_HASH_SIZE) {
 543                         cpt++;
 544                         hash = 0;
 545                         hoff = 1;
 546                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 547                                 goto again;
 548                 }
 549         }
 550
 551         len = s - tmpstr;     /* how many bytes was written */
 552
 553         if (len > *lenp) {    /* linux-supplied buffer is too small */
 554                 rc = -EINVAL;
 555         } else if (len > 0) { /* wrote something */
 556                 if (copy_to_user(buffer, tmpstr, len))
 557                         rc = -EFAULT;
 558                 else
 559                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 560         }
 561
 562         LIBCFS_FREE(tmpstr, tmpsiz);
 563
 564         if (rc == 0)
 565                 *lenp = len;
 566
 567         return rc;
 568 }
 569
 570 static int __proc_lnet_buffers(void *data, int write,
 571                                loff_t pos, void __user *buffer, int nob)
 572 {
 573         char            *s;
 574         char            *tmpstr;
 575         int             tmpsiz;
 576         int             idx;
 577         int             len;
 578         int             rc;
 579         int             i;
 580
 581         LASSERT(!write);
 582
 583         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 584         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 585         LIBCFS_ALLOC(tmpstr, tmpsiz);
 586         if (tmpstr == NULL)
 587                 return -ENOMEM;
 588
 589         s = tmpstr; /* points to current position in tmpstr[] */
 590
 591         s += snprintf(s, tmpstr + tmpsiz - s,
 592                       "%5s %5s %7s %7s\n",
 593                       "pages", "count", "credits", "min");
 594         LASSERT (tmpstr + tmpsiz - s > 0);
 595
 596         if (the_lnet.ln_rtrpools == NULL)
 597                 goto out; /* I'm not a router */
 598
 599         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 600                 lnet_rtrbufpool_t *rbp;
 601
 602                 lnet_net_lock(LNET_LOCK_EX);
 603                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 604                         s += snprintf(s, tmpstr + tmpsiz - s,
 605                                       "%5d %5d %7d %7d\n",
 606                                       rbp[idx].rbp_npages,
 607                                       rbp[idx].rbp_nbuffers,
 608                                       rbp[idx].rbp_credits,
 609                                       rbp[idx].rbp_mincredits);
 610                         LASSERT(tmpstr + tmpsiz - s > 0);
 611                 }
 612                 lnet_net_unlock(LNET_LOCK_EX);
 613         }
 614
 615  out:
 616         len = s - tmpstr;
 617
 618         if (pos >= min_t(int, len, strlen(tmpstr)))
 619                 rc = 0;
 620         else
 621                 rc = cfs_trace_copyout_string(buffer, nob,
 622                                               tmpstr + pos, NULL);
 623
 624         LIBCFS_FREE(tmpstr, tmpsiz);
 625         return rc;
 626 }
 627
 628 static int
 629 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 630                   size_t *lenp, loff_t *ppos)
 631 {
 632         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 633                                     __proc_lnet_buffers);
 634 }
 635
 636 static int
 637 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 638               size_t *lenp, loff_t *ppos)
 639 {
 640         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 641         int        rc = 0;
 642         char      *tmpstr;
 643         char      *s;
 644         int        len;
 645
 646         LASSERT (!write);
 647
 648         if (*lenp == 0)
 649                 return 0;
 650
 651         LIBCFS_ALLOC(tmpstr, tmpsiz);
 652         if (tmpstr == NULL)
 653                 return -ENOMEM;
 654
 655         s = tmpstr; /* points to current position in tmpstr[] */
 656
 657         if (*ppos == 0) {
 658                 s += snprintf(s, tmpstr + tmpsiz - s,
 659                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 660                               "nid", "status", "alive", "refs", "peer",
 661                               "rtr", "max", "tx", "min");
 662                 LASSERT (tmpstr + tmpsiz - s > 0);
 663         } else {
 664                 struct list_head  *n;
 665                 lnet_ni_t         *ni   = NULL;
 666                 int                skip = *ppos - 1;
 667
 668                 lnet_net_lock(0);
 669
 670                 n = the_lnet.ln_nis.next;
 671
 672                 while (n != &the_lnet.ln_nis) {
 673                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 674
 675                         if (skip == 0) {
 676                                 ni = a_ni;
 677                                 break;
 678                         }
 679
 680                         skip--;
 681                         n = n->next;
 682                 }
 683
 684                 if (ni != NULL) {
 685                         struct lnet_tx_queue    *tq;
 686                         char    *stat;
 687                         long    now = cfs_time_current_sec();
 688                         int     last_alive = -1;
 689                         int     i;
 690                         int     j;
 691
 692                         if (the_lnet.ln_routing)
 693                                 last_alive = now - ni->ni_last_alive;
 694
 695                         /* @lo forever alive */
 696                         if (ni->ni_lnd->lnd_type == LOLND)
 697                                 last_alive = 0;
 698
 699                         lnet_ni_lock(ni);
 700                         LASSERT(ni->ni_status != NULL);
 701                         stat = (ni->ni_status->ns_status ==
 702                                 LNET_NI_STATUS_UP) ? "up" : "down";
 703                         lnet_ni_unlock(ni);
 704
 705                         /* we actually output credits information for
 706                          * TX queue of each partition */
 707                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 708                                 for (j = 0; ni->ni_cpts != NULL &&
 709                                      j < ni->ni_ncpts; j++) {
 710                                         if (i == ni->ni_cpts[j])
 711                                                 break;
 712                                 }
 713
 714                                 if (j == ni->ni_ncpts)
 715                                         continue;
 716
 717                                 if (i != 0)
 718                                         lnet_net_lock(i);
 719
 720                                 s += snprintf(s, tmpstr + tmpsiz - s,
 721                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 722                                       libcfs_nid2str(ni->ni_nid), stat,
 723                                       last_alive, *ni->ni_refs[i],
 724                                       ni->ni_peertxcredits,
 725                                       ni->ni_peerrtrcredits,
 726                                       tq->tq_credits_max,
 727                                       tq->tq_credits, tq->tq_credits_min);
 728                                 if (i != 0)
 729                                         lnet_net_unlock(i);
 730                         }
 731                         LASSERT(tmpstr + tmpsiz - s > 0);
 732                 }
 733
 734                 lnet_net_unlock(0);
 735         }
 736
 737         len = s - tmpstr;     /* how many bytes was written */
 738
 739         if (len > *lenp) {    /* linux-supplied buffer is too small */
 740                 rc = -EINVAL;
 741         } else if (len > 0) { /* wrote something */
 742                 if (copy_to_user(buffer, tmpstr, len))
 743                         rc = -EFAULT;
 744                 else
 745                         *ppos += 1;
 746         }
 747
 748         LIBCFS_FREE(tmpstr, tmpsiz);
 749
 750         if (rc == 0)
 751                 *lenp = len;
 752
 753         return rc;
 754 }
 755
 756 struct lnet_portal_rotors {
 757         int             pr_value;
 758         const char      *pr_name;
 759         const char      *pr_desc;
 760 };
 761
 762 static struct lnet_portal_rotors        portal_rotors[] = {
 763         {
 764                 .pr_value = LNET_PTL_ROTOR_OFF,
 765                 .pr_name  = "OFF",
 766                 .pr_desc  = "Turn off message rotor for wildcard portals"
 767         },
 768         {
 769                 .pr_value = LNET_PTL_ROTOR_ON,
 770                 .pr_name  = "ON",
 771                 .pr_desc  = "round-robin dispatch all PUT messages for "
 772                             "wildcard portals"
 773         },
 774         {
 775                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 776                 .pr_name  = "RR_RT",
 777                 .pr_desc  = "round-robin dispatch routed PUT message for "
 778                             "wildcard portals"
 779         },
 780         {
 781                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 782                 .pr_name  = "HASH_RT",
 783                 .pr_desc  = "dispatch routed PUT message by hashing source "
 784                             "NID for wildcard portals"
 785         },
 786         {
 787                 .pr_value = -1,
 788                 .pr_name  = NULL,
 789                 .pr_desc  = NULL
 790         },
 791 };
 792
 793 extern int portal_rotor;
 794
 795 static int __proc_lnet_portal_rotor(void *data, int write,
 796                                     loff_t pos, void __user *buffer, int nob)
 797 {
 798         const int       buf_len = 128;
 799         char            *buf;
 800         char            *tmp;
 801         int             rc;
 802         int             i;
 803
 804         LIBCFS_ALLOC(buf, buf_len);
 805         if (buf == NULL)
 806                 return -ENOMEM;
 807
 808         if (!write) {
 809                 lnet_res_lock(0);
 810
 811                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 812                         if (portal_rotors[i].pr_value == portal_rotor)
 813                                 break;
 814                 }
 815
 816                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 817                 lnet_res_unlock(0);
 818
 819                 rc = snprintf(buf, buf_len,
 820                               "{\n\tportals: all\n"
 821                               "\trotor: %s\n\tdescription: %s\n}",
 822                               portal_rotors[i].pr_name,
 823                               portal_rotors[i].pr_desc);
 824
 825                 if (pos >= min_t(int, rc, buf_len)) {
 826                         rc = 0;
 827                 } else {
 828                         rc = cfs_trace_copyout_string(buffer, nob,
 829                                         buf + pos, "\n");
 830                 }
 831                 goto out;
 832         }
 833
 834         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 835         if (rc < 0)
 836                 goto out;
 837
 838         tmp = cfs_trimwhite(buf);
 839
 840         rc = -EINVAL;
 841         lnet_res_lock(0);
 842         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 843                 if (cfs_strncasecmp(portal_rotors[i].pr_name, tmp,
 844                                     strlen(portal_rotors[i].pr_name)) == 0) {
 845                         portal_rotor = portal_rotors[i].pr_value;
 846                         rc = 0;
 847                         break;
 848                 }
 849         }
 850         lnet_res_unlock(0);
 851 out:
 852         LIBCFS_FREE(buf, buf_len);
 853         return rc;
 854 }
 855
 856 static int
 857 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 858                        size_t *lenp, loff_t *ppos)
 859 {
 860         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 861                                     __proc_lnet_portal_rotor);
 862 }
 863
 864
 865 static struct ctl_table lnet_table[] = {
 866         /*
 867          * NB No .strategy entries have been provided since sysctl(8) prefers
 868          * to go via /proc for portability.
 869          */
 870         {
 871                 INIT_CTL_NAME
 872                 .procname       = "stats",
 873                 .mode           = 0644,
 874                 .proc_handler   = &proc_lnet_stats,
 875         },
 876         {
 877                 INIT_CTL_NAME
 878                 .procname       = "routes",
 879                 .mode           = 0444,
 880                 .proc_handler   = &proc_lnet_routes,
 881         },
 882         {
 883                 INIT_CTL_NAME
 884                 .procname       = "routers",
 885                 .mode           = 0444,
 886                 .proc_handler   = &proc_lnet_routers,
 887         },
 888         {
 889                 INIT_CTL_NAME
 890                 .procname       = "peers",
 891                 .mode           = 0444,
 892                 .proc_handler   = &proc_lnet_peers,
 893         },
 894         {
 895                 INIT_CTL_NAME
 896                 .procname       = "buffers",
 897                 .mode           = 0444,
 898                 .proc_handler   = &proc_lnet_buffers,
 899         },
 900         {
 901                 INIT_CTL_NAME
 902                 .procname       = "nis",
 903                 .mode           = 0444,
 904                 .proc_handler   = &proc_lnet_nis,
 905         },
 906         {
 907                 INIT_CTL_NAME
 908                 .procname       = "portal_rotor",
 909                 .mode           = 0644,
 910                 .proc_handler   = &proc_lnet_portal_rotor,
 911         },
 912         { 0 }
 913 };
 914
 915 static struct ctl_table top_table[] = {
 916         {
 917                 INIT_CTL_NAME
 918                 .procname       = "lnet",
 919                 .mode           = 0555,
 920                 .data           = NULL,
 921                 .maxlen         = 0,
 922                 .child          = lnet_table,
 923         },
 924         { 0 }
 925 };
 926
 927 void
 928 lnet_proc_init(void)
 929 {
 930 #ifdef CONFIG_SYSCTL
 931         if (lnet_table_header == NULL)
 932                 lnet_table_header = register_sysctl_table(top_table);
 933 #endif
 934 }
 935
 936 void
 937 lnet_proc_fini(void)
 938 {
 939 #ifdef CONFIG_SYSCTL
 940         if (lnet_table_header != NULL)
 941                 unregister_sysctl_table(lnet_table_header);
 942
 943         lnet_table_header = NULL;
 944 #endif
 945 }
 946
 947 #else
 948
 949 void
 950 lnet_proc_init(void)
 951 {
 952 }
 953
 954 void
 955 lnet_proc_fini(void)
 956 {
 957 }
 958
 959 #endif