lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2017, Intel Corporation.
   5  *
   6  *   This file is part of Lustre, https://wiki.whamcloud.com/
   7  *
   8  *   Portals is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Portals is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Portals; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define DEBUG_SUBSYSTEM S_LNET
  24
  25 #include <linux/uaccess.h>
  26
  27 #include <libcfs/libcfs.h>
  28 #include <lnet/lib-lnet.h>
  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 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  34 /*
  35  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  36  */
  37 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  38 /* change version, 16 bits or 8 bits */
  39 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  40
  41 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  42 /*
  43  * bits for peer hash offset
  44  * NB: we don't use the highest bit of *ppos because it's signed
  45  */
  46 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  47                                  LNET_PROC_CPT_BITS -    \
  48                                  LNET_PROC_VER_BITS -    \
  49                                  LNET_PROC_HASH_BITS - 1)
  50 /* bits for hash index + position */
  51 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  52 /* bits for peer hash table + hash version */
  53 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  54
  55 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  56 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  57 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  58 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  59
  60 #define LNET_PROC_CPT_GET(pos)                          \
  61         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  62
  63 #define LNET_PROC_VER_GET(pos)                          \
  64         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  65
  66 #define LNET_PROC_HASH_GET(pos)                         \
  67         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  68
  69 #define LNET_PROC_HOFF_GET(pos)                         \
  70         (int)((pos) & LNET_PROC_HOFF_MASK)
  71
  72 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  73         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  74         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  75         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  76         ((off) & LNET_PROC_HOFF_MASK))
  77
  78 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  79
  80 static int __proc_lnet_stats(void *data, int write,
  81                              loff_t pos, void __user *buffer, int nob)
  82 {
  83         int              rc;
  84         struct lnet_counters *ctrs;
  85         struct lnet_counters_common common;
  86         int              len;
  87         char            *tmpstr;
  88         const int        tmpsiz = 256; /* 7 %u and 4 __u64 */
  89
  90         if (write) {
  91                 lnet_counters_reset();
  92                 return 0;
  93         }
  94
  95         /* read */
  96
  97         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
  98         if (ctrs == NULL)
  99                 return -ENOMEM;
 100
 101         LIBCFS_ALLOC(tmpstr, tmpsiz);
 102         if (tmpstr == NULL) {
 103                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 104                 return -ENOMEM;
 105         }
 106
 107         lnet_counters_get(ctrs);
 108         common = ctrs->lct_common;
 109
 110         len = snprintf(tmpstr, tmpsiz,
 111                        "%u %u %u %u %u %u %u %llu %llu "
 112                        "%llu %llu",
 113                        common.lcc_msgs_alloc, common.lcc_msgs_max,
 114                        common.lcc_errors,
 115                        common.lcc_send_count, common.lcc_recv_count,
 116                        common.lcc_route_count, common.lcc_drop_count,
 117                        common.lcc_send_length, common.lcc_recv_length,
 118                        common.lcc_route_length, common.lcc_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                 struct lnet_route               *route = NULL;
 184                 struct lnet_remotenet   *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, struct lnet_remotenet,
 205                                                   lrn_list);
 206
 207                                 r = rnet->lrn_routes.next;
 208
 209                                 while (r != &rnet->lrn_routes) {
 210                                         struct lnet_route *re =
 211                                                 list_entry(r, struct lnet_route,
 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                         __u32 hops              = route->lr_hops;
 229                         unsigned int priority   = route->lr_priority;
 230                         lnet_nid_t   nid        = route->lr_gateway->lp_primary_nid;
 231                         int          alive      = lnet_is_route_alive(route);
 232
 233                         s += snprintf(s, tmpstr + tmpsiz - s,
 234                                       "%-8s %4d %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                         struct lnet_peer *lp =
 322                           list_entry(r, struct lnet_peer,
 323                                      lp_rtr_list);
 324
 325                         if (skip == 0) {
 326                                 peer = lp;
 327                                 break;
 328                         }
 329
 330                         skip--;
 331                         r = r->next;
 332                 }
 333
 334                 if (peer != NULL) {
 335                         lnet_nid_t nid = peer->lp_primary_nid;
 336                         time64_t now = ktime_get_seconds();
 337                         /* TODO: readjust what's being printed */
 338                         time64_t deadline = 0;
 339                         int nrefs     = atomic_read(&peer->lp_refcount);
 340                         int nrtrrefs  = peer->lp_rtr_refcount;
 341                         int alive_cnt = 0;
 342                         int alive     = 0;
 343                         int pingsent  = ((peer->lp_state & LNET_PEER_PING_SENT)
 344                                          != 0);
 345                         time64_t last_ping = now - peer->lp_rtrcheck_timestamp;
 346                         int down_ni   = 0;
 347                         struct lnet_route *rtr;
 348
 349                         if (nrtrrefs > 0) {
 350                                 list_for_each_entry(rtr, &peer->lp_routes,
 351                                                     lr_gwlist) {
 352                                         /* downis on any route should be the
 353                                          * number of downis on the gateway */
 354                                         if (rtr->lr_downis != 0) {
 355                                                 down_ni = rtr->lr_downis;
 356                                                 break;
 357                                         }
 358                                 }
 359                         }
 360
 361                         if (deadline == 0)
 362                                 s += snprintf(s, tmpstr + tmpsiz - s,
 363                                               "%-4d %7d %9d %6s %12llu %9d %8s %7d %s\n",
 364                                               nrefs, nrtrrefs, alive_cnt,
 365                                               alive ? "up" : "down", last_ping,
 366                                               pingsent, "NA", down_ni,
 367                                               libcfs_nid2str(nid));
 368                         else
 369                                 s += snprintf(s, tmpstr + tmpsiz - s,
 370                                               "%-4d %7d %9d %6s %12llu %9d %8llu %7d %s\n",
 371                                               nrefs, nrtrrefs, alive_cnt,
 372                                               alive ? "up" : "down", last_ping,
 373                                               pingsent,
 374                                               deadline - now,
 375                                               down_ni, libcfs_nid2str(nid));
 376                         LASSERT(tmpstr + tmpsiz - s > 0);
 377                 }
 378
 379                 lnet_net_unlock(0);
 380         }
 381
 382         len = s - tmpstr;     /* how many bytes was written */
 383
 384         if (len > *lenp) {    /* linux-supplied buffer is too small */
 385                 rc = -EINVAL;
 386         } else if (len > 0) { /* wrote something */
 387                 if (copy_to_user(buffer, tmpstr, len))
 388                         rc = -EFAULT;
 389                 else {
 390                         off += 1;
 391                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 392                 }
 393         }
 394
 395         LIBCFS_FREE(tmpstr, tmpsiz);
 396
 397         if (rc == 0)
 398                 *lenp = len;
 399
 400         return rc;
 401 }
 402
 403 /* TODO: there should be no direct access to ptable. We should add a set
 404  * of APIs that give access to the ptable and its members */
 405 static int
 406 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 407                 size_t *lenp, loff_t *ppos)
 408 {
 409         const int               tmpsiz  = 256;
 410         struct lnet_peer_table  *ptable;
 411         char                    *tmpstr = NULL;
 412         char                    *s;
 413         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 414         int                     ver  = LNET_PROC_VER_GET(*ppos);
 415         int                     hash = LNET_PROC_HASH_GET(*ppos);
 416         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 417         int                     rc = 0;
 418         int                     len;
 419
 420         if (write) {
 421                 int i;
 422                 struct lnet_peer_ni *peer;
 423
 424                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
 425                         lnet_net_lock(i);
 426                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
 427                                 list_for_each_entry(peer,
 428                                                     &ptable->pt_hash[hash],
 429                                                     lpni_hashlist) {
 430                                         peer->lpni_mintxcredits =
 431                                                 peer->lpni_txcredits;
 432                                         peer->lpni_minrtrcredits =
 433                                                 peer->lpni_rtrcredits;
 434                                 }
 435                         }
 436                         lnet_net_unlock(i);
 437                 }
 438                 *ppos += *lenp;
 439                 return 0;
 440         }
 441
 442         if (*lenp == 0)
 443                 return 0;
 444
 445         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 446
 447         if (cpt >= LNET_CPT_NUMBER) {
 448                 *lenp = 0;
 449                 return 0;
 450         }
 451
 452         LIBCFS_ALLOC(tmpstr, tmpsiz);
 453         if (tmpstr == NULL)
 454                 return -ENOMEM;
 455
 456         s = tmpstr; /* points to current position in tmpstr[] */
 457
 458         if (*ppos == 0) {
 459                 s += snprintf(s, tmpstr + tmpsiz - s,
 460                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 461                               "nid", "refs", "state", "last", "max",
 462                               "rtr", "min", "tx", "min", "queue");
 463                 LASSERT(tmpstr + tmpsiz - s > 0);
 464
 465                 hoff++;
 466         } else {
 467                 struct lnet_peer_ni     *peer;
 468                 struct list_head        *p;
 469                 int                     skip;
 470
 471  again:
 472                 p = NULL;
 473                 peer = NULL;
 474                 skip = hoff - 1;
 475
 476                 lnet_net_lock(cpt);
 477                 ptable = the_lnet.ln_peer_tables[cpt];
 478                 if (hoff == 1)
 479                         ver = LNET_PROC_VERSION(ptable->pt_version);
 480
 481                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 482                         lnet_net_unlock(cpt);
 483                         LIBCFS_FREE(tmpstr, tmpsiz);
 484                         return -ESTALE;
 485                 }
 486
 487                 while (hash < LNET_PEER_HASH_SIZE) {
 488                         if (p == NULL)
 489                                 p = ptable->pt_hash[hash].next;
 490
 491                         while (p != &ptable->pt_hash[hash]) {
 492                                 struct lnet_peer_ni *lp =
 493                                   list_entry(p, struct lnet_peer_ni,
 494                                              lpni_hashlist);
 495                                 if (skip == 0) {
 496                                         peer = lp;
 497
 498                                         /* minor optimization: start from idx+1
 499                                          * on next iteration if we've just
 500                                          * drained lpni_hashlist */
 501                                         if (lp->lpni_hashlist.next ==
 502                                             &ptable->pt_hash[hash]) {
 503                                                 hoff = 1;
 504                                                 hash++;
 505                                         } else {
 506                                                 hoff++;
 507                                         }
 508
 509                                         break;
 510                                 }
 511
 512                                 skip--;
 513                                 p = lp->lpni_hashlist.next;
 514                         }
 515
 516                         if (peer != NULL)
 517                                 break;
 518
 519                         p = NULL;
 520                         hoff = 1;
 521                         hash++;
 522                 }
 523
 524                 if (peer != NULL) {
 525                         lnet_nid_t nid = peer->lpni_nid;
 526                         int nrefs = atomic_read(&peer->lpni_refcount);
 527                         time64_t lastalive = -1;
 528                         char *aliveness = "NA";
 529                         int maxcr = (peer->lpni_net) ?
 530                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 531                         int txcr = peer->lpni_txcredits;
 532                         int mintxcr = peer->lpni_mintxcredits;
 533                         int rtrcr = peer->lpni_rtrcredits;
 534                         int minrtrcr = peer->lpni_minrtrcredits;
 535                         int txqnob = peer->lpni_txqnob;
 536
 537                         if (lnet_isrouter(peer) ||
 538                             lnet_peer_aliveness_enabled(peer))
 539                                 aliveness = peer->lpni_alive ? "up" : "down";
 540
 541                         if (lnet_peer_aliveness_enabled(peer)) {
 542                                 time64_t now = ktime_get_seconds();
 543
 544                                 lastalive = now - peer->lpni_last_alive;
 545
 546                                 /* No need to mess up peers contents with
 547                                  * arbitrarily long integers - it suffices to
 548                                  * know that lastalive is more than 10000s old
 549                                  */
 550                                 if (lastalive >= 10000)
 551                                         lastalive = 9999;
 552                         }
 553
 554                         lnet_net_unlock(cpt);
 555
 556                         s += snprintf(s, tmpstr + tmpsiz - s,
 557                                       "%-24s %4d %5s %5lld %5d %5d %5d %5d %5d %d\n",
 558                                       libcfs_nid2str(nid), nrefs, aliveness,
 559                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 560                                       mintxcr, txqnob);
 561                         LASSERT(tmpstr + tmpsiz - s > 0);
 562
 563                 } else { /* peer is NULL */
 564                         lnet_net_unlock(cpt);
 565                 }
 566
 567                 if (hash == LNET_PEER_HASH_SIZE) {
 568                         cpt++;
 569                         hash = 0;
 570                         hoff = 1;
 571                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 572                                 goto again;
 573                 }
 574         }
 575
 576         len = s - tmpstr;     /* how many bytes was written */
 577
 578         if (len > *lenp) {    /* linux-supplied buffer is too small */
 579                 rc = -EINVAL;
 580         } else if (len > 0) { /* wrote something */
 581                 if (copy_to_user(buffer, tmpstr, len))
 582                         rc = -EFAULT;
 583                 else
 584                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 585         }
 586
 587         LIBCFS_FREE(tmpstr, tmpsiz);
 588
 589         if (rc == 0)
 590                 *lenp = len;
 591
 592         return rc;
 593 }
 594
 595 static int __proc_lnet_buffers(void *data, int write,
 596                                loff_t pos, void __user *buffer, int nob)
 597 {
 598         char            *s;
 599         char            *tmpstr;
 600         int             tmpsiz;
 601         int             idx;
 602         int             len;
 603         int             rc;
 604         int             i;
 605
 606         LASSERT(!write);
 607
 608         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 609         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 610         LIBCFS_ALLOC(tmpstr, tmpsiz);
 611         if (tmpstr == NULL)
 612                 return -ENOMEM;
 613
 614         s = tmpstr; /* points to current position in tmpstr[] */
 615
 616         s += snprintf(s, tmpstr + tmpsiz - s,
 617                       "%5s %5s %7s %7s\n",
 618                       "pages", "count", "credits", "min");
 619         LASSERT(tmpstr + tmpsiz - s > 0);
 620
 621         if (the_lnet.ln_rtrpools == NULL)
 622                 goto out; /* I'm not a router */
 623
 624         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 625                 struct lnet_rtrbufpool *rbp;
 626
 627                 lnet_net_lock(LNET_LOCK_EX);
 628                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 629                         s += snprintf(s, tmpstr + tmpsiz - s,
 630                                       "%5d %5d %7d %7d\n",
 631                                       rbp[idx].rbp_npages,
 632                                       rbp[idx].rbp_nbuffers,
 633                                       rbp[idx].rbp_credits,
 634                                       rbp[idx].rbp_mincredits);
 635                         LASSERT(tmpstr + tmpsiz - s > 0);
 636                 }
 637                 lnet_net_unlock(LNET_LOCK_EX);
 638         }
 639
 640  out:
 641         len = s - tmpstr;
 642
 643         if (pos >= min_t(int, len, strlen(tmpstr)))
 644                 rc = 0;
 645         else
 646                 rc = cfs_trace_copyout_string(buffer, nob,
 647                                               tmpstr + pos, NULL);
 648
 649         LIBCFS_FREE(tmpstr, tmpsiz);
 650         return rc;
 651 }
 652
 653 static int
 654 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 655                   size_t *lenp, loff_t *ppos)
 656 {
 657         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 658                                     __proc_lnet_buffers);
 659 }
 660
 661 static int
 662 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 663               size_t *lenp, loff_t *ppos)
 664 {
 665         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 666         int     rc = 0;
 667         char    *tmpstr;
 668         char    *s;
 669         int     len;
 670
 671         if (*lenp == 0)
 672                 return 0;
 673
 674         if (write) {
 675                 /* Just reset the min stat. */
 676                 struct lnet_ni  *ni;
 677                 struct lnet_net *net;
 678
 679                 lnet_net_lock(0);
 680
 681                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
 682                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 683                                 struct lnet_tx_queue *tq;
 684                                 int i;
 685                                 int j;
 686
 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                                         tq->tq_credits_min = tq->tq_credits;
 700                                         if (i != 0)
 701                                                 lnet_net_unlock(i);
 702                                 }
 703                         }
 704                 }
 705                 lnet_net_unlock(0);
 706                 *ppos += *lenp;
 707                 return 0;
 708         }
 709
 710         LIBCFS_ALLOC(tmpstr, tmpsiz);
 711         if (tmpstr == NULL)
 712                 return -ENOMEM;
 713
 714         s = tmpstr; /* points to current position in tmpstr[] */
 715
 716         if (*ppos == 0) {
 717                 s += snprintf(s, tmpstr + tmpsiz - s,
 718                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 719                               "nid", "status", "alive", "refs", "peer",
 720                               "rtr", "max", "tx", "min");
 721                 LASSERT (tmpstr + tmpsiz - s > 0);
 722         } else {
 723                 struct lnet_ni *ni   = NULL;
 724                 int skip = *ppos - 1;
 725
 726                 lnet_net_lock(0);
 727
 728                 ni = lnet_get_ni_idx_locked(skip);
 729
 730                 if (ni != NULL) {
 731                         struct lnet_tx_queue *tq;
 732                         char *stat;
 733                         time64_t now = ktime_get_real_seconds();
 734                         time64_t last_alive = -1;
 735                         int i;
 736                         int j;
 737
 738                         if (the_lnet.ln_routing)
 739                                 last_alive = now - ni->ni_last_alive;
 740
 741                         /* @lo forever alive */
 742                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 743                                 last_alive = 0;
 744
 745                         lnet_ni_lock(ni);
 746                         LASSERT(ni->ni_status != NULL);
 747                         stat = (ni->ni_status->ns_status ==
 748                                 LNET_NI_STATUS_UP) ? "up" : "down";
 749                         lnet_ni_unlock(ni);
 750
 751                         /* we actually output credits information for
 752                          * TX queue of each partition */
 753                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 754                                 for (j = 0; ni->ni_cpts != NULL &&
 755                                      j < ni->ni_ncpts; j++) {
 756                                         if (i == ni->ni_cpts[j])
 757                                                 break;
 758                                 }
 759
 760                                 if (j == ni->ni_ncpts)
 761                                         continue;
 762
 763                                 if (i != 0)
 764                                         lnet_net_lock(i);
 765
 766                                 s += snprintf(s, tmpstr + tmpsiz - s,
 767                                       "%-24s %6s %5lld %4d %4d %4d %5d %5d %5d\n",
 768                                       libcfs_nid2str(ni->ni_nid), stat,
 769                                       last_alive, *ni->ni_refs[i],
 770                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 771                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 772                                       tq->tq_credits_max,
 773                                       tq->tq_credits, tq->tq_credits_min);
 774                                 if (i != 0)
 775                                         lnet_net_unlock(i);
 776                         }
 777                         LASSERT(tmpstr + tmpsiz - s > 0);
 778                 }
 779
 780                 lnet_net_unlock(0);
 781         }
 782
 783         len = s - tmpstr;     /* how many bytes was written */
 784
 785         if (len > *lenp) {    /* linux-supplied buffer is too small */
 786                 rc = -EINVAL;
 787         } else if (len > 0) { /* wrote something */
 788                 if (copy_to_user(buffer, tmpstr, len))
 789                         rc = -EFAULT;
 790                 else
 791                         *ppos += 1;
 792         }
 793
 794         LIBCFS_FREE(tmpstr, tmpsiz);
 795
 796         if (rc == 0)
 797                 *lenp = len;
 798
 799         return rc;
 800 }
 801
 802 struct lnet_portal_rotors {
 803         int             pr_value;
 804         const char      *pr_name;
 805         const char      *pr_desc;
 806 };
 807
 808 static struct lnet_portal_rotors        portal_rotors[] = {
 809         {
 810                 .pr_value = LNET_PTL_ROTOR_OFF,
 811                 .pr_name  = "OFF",
 812                 .pr_desc  = "Turn off message rotor for wildcard portals"
 813         },
 814         {
 815                 .pr_value = LNET_PTL_ROTOR_ON,
 816                 .pr_name  = "ON",
 817                 .pr_desc  = "round-robin dispatch all PUT messages for "
 818                             "wildcard portals"
 819         },
 820         {
 821                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 822                 .pr_name  = "RR_RT",
 823                 .pr_desc  = "round-robin dispatch routed PUT message for "
 824                             "wildcard portals"
 825         },
 826         {
 827                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 828                 .pr_name  = "HASH_RT",
 829                 .pr_desc  = "dispatch routed PUT message by hashing source "
 830                             "NID for wildcard portals"
 831         },
 832         {
 833                 .pr_value = -1,
 834                 .pr_name  = NULL,
 835                 .pr_desc  = NULL
 836         },
 837 };
 838
 839 static int __proc_lnet_portal_rotor(void *data, int write,
 840                                     loff_t pos, void __user *buffer, int nob)
 841 {
 842         const int       buf_len = 128;
 843         char            *buf;
 844         char            *tmp;
 845         int             rc;
 846         int             i;
 847
 848         LIBCFS_ALLOC(buf, buf_len);
 849         if (buf == NULL)
 850                 return -ENOMEM;
 851
 852         if (!write) {
 853                 lnet_res_lock(0);
 854
 855                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 856                         if (portal_rotors[i].pr_value == portal_rotor)
 857                                 break;
 858                 }
 859
 860                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 861                 lnet_res_unlock(0);
 862
 863                 rc = snprintf(buf, buf_len,
 864                               "{\n\tportals: all\n"
 865                               "\trotor: %s\n\tdescription: %s\n}",
 866                               portal_rotors[i].pr_name,
 867                               portal_rotors[i].pr_desc);
 868
 869                 if (pos >= min_t(int, rc, buf_len)) {
 870                         rc = 0;
 871                 } else {
 872                         rc = cfs_trace_copyout_string(buffer, nob,
 873                                         buf + pos, "\n");
 874                 }
 875                 goto out;
 876         }
 877
 878         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 879         if (rc < 0)
 880                 goto out;
 881
 882         tmp = strim(buf);
 883
 884         rc = -EINVAL;
 885         lnet_res_lock(0);
 886         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 887                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 888                                 strlen(portal_rotors[i].pr_name)) == 0) {
 889                         portal_rotor = portal_rotors[i].pr_value;
 890                         rc = 0;
 891                         break;
 892                 }
 893         }
 894         lnet_res_unlock(0);
 895 out:
 896         LIBCFS_FREE(buf, buf_len);
 897         return rc;
 898 }
 899
 900 static int
 901 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 902                        size_t *lenp, loff_t *ppos)
 903 {
 904         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 905                                     __proc_lnet_portal_rotor);
 906 }
 907
 908
 909 static struct ctl_table lnet_table[] = {
 910         /*
 911          * NB No .strategy entries have been provided since sysctl(8) prefers
 912          * to go via /proc for portability.
 913          */
 914         {
 915                 INIT_CTL_NAME
 916                 .procname       = "stats",
 917                 .mode           = 0644,
 918                 .proc_handler   = &proc_lnet_stats,
 919         },
 920         {
 921                 INIT_CTL_NAME
 922                 .procname       = "routes",
 923                 .mode           = 0444,
 924                 .proc_handler   = &proc_lnet_routes,
 925         },
 926         {
 927                 INIT_CTL_NAME
 928                 .procname       = "routers",
 929                 .mode           = 0444,
 930                 .proc_handler   = &proc_lnet_routers,
 931         },
 932         {
 933                 INIT_CTL_NAME
 934                 .procname       = "peers",
 935                 .mode           = 0644,
 936                 .proc_handler   = &proc_lnet_peers,
 937         },
 938         {
 939                 INIT_CTL_NAME
 940                 .procname       = "buffers",
 941                 .mode           = 0444,
 942                 .proc_handler   = &proc_lnet_buffers,
 943         },
 944         {
 945                 INIT_CTL_NAME
 946                 .procname       = "nis",
 947                 .mode           = 0644,
 948                 .proc_handler   = &proc_lnet_nis,
 949         },
 950         {
 951                 INIT_CTL_NAME
 952                 .procname       = "portal_rotor",
 953                 .mode           = 0644,
 954                 .proc_handler   = &proc_lnet_portal_rotor,
 955         },
 956         { .procname = NULL }
 957 };
 958
 959 void lnet_router_debugfs_init(void)
 960 {
 961         lnet_insert_debugfs(lnet_table);
 962 }
 963
 964 void lnet_router_debugfs_fini(void)
 965 {
 966         lnet_remove_debugfs(lnet_table);
 967 }