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.hpdd.intel.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/linux/linux-misc.h>
  28 #include <libcfs/libcfs.h>
  29 #include <lnet/lib-lnet.h>
  30
  31 /* This is really lnet_proc.c. You might need to update sanity test 215
  32  * if any file format is changed. */
  33
  34 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  35 /*
  36  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  37  */
  38 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  39 /* change version, 16 bits or 8 bits */
  40 #define LNET_PROC_VER_BITS      MAX(((MIN(LNET_LOFFT_BITS, 64)) / 4), 8)
  41
  42 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  43 /*
  44  * bits for peer hash offset
  45  * NB: we don't use the highest bit of *ppos because it's signed
  46  */
  47 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  48                                  LNET_PROC_CPT_BITS -    \
  49                                  LNET_PROC_VER_BITS -    \
  50                                  LNET_PROC_HASH_BITS - 1)
  51 /* bits for hash index + position */
  52 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  53 /* bits for peer hash table + hash version */
  54 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  55
  56 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  57 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  58 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  59 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  60
  61 #define LNET_PROC_CPT_GET(pos)                          \
  62         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  63
  64 #define LNET_PROC_VER_GET(pos)                          \
  65         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  66
  67 #define LNET_PROC_HASH_GET(pos)                         \
  68         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  69
  70 #define LNET_PROC_HOFF_GET(pos)                         \
  71         (int)((pos) & LNET_PROC_HOFF_MASK)
  72
  73 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  74         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  75         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  76         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  77         ((off) & LNET_PROC_HOFF_MASK))
  78
  79 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  80
  81 static int __proc_lnet_stats(void *data, int write,
  82                              loff_t pos, void __user *buffer, int nob)
  83 {
  84         int              rc;
  85         struct lnet_counters *ctrs;
  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
 109         len = snprintf(tmpstr, tmpsiz,
 110                        "%u %u %u %u %u %u %u %llu %llu "
 111                        "%llu %llu",
 112                        ctrs->msgs_alloc, ctrs->msgs_max,
 113                        ctrs->errors,
 114                        ctrs->send_count, ctrs->recv_count,
 115                        ctrs->route_count, ctrs->drop_count,
 116                        ctrs->send_length, ctrs->recv_length,
 117                        ctrs->route_length, ctrs->drop_length);
 118
 119         if (pos >= min_t(int, len, strlen(tmpstr)))
 120                 rc = 0;
 121         else
 122                 rc = cfs_trace_copyout_string(buffer, nob,
 123                                               tmpstr + pos, "\n");
 124
 125         LIBCFS_FREE(tmpstr, tmpsiz);
 126         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 127         return rc;
 128 }
 129
 130 static int
 131 proc_lnet_stats(struct ctl_table *table, int write, void __user *buffer,
 132                 size_t *lenp, loff_t *ppos)
 133 {
 134         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 135                                     __proc_lnet_stats);
 136 }
 137
 138 static int
 139 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 140                  size_t *lenp, loff_t *ppos)
 141 {
 142         const int       tmpsiz = 256;
 143         char            *tmpstr;
 144         char            *s;
 145         int             rc = 0;
 146         int             len;
 147         int             ver;
 148         int             off;
 149
 150         CLASSERT(sizeof(loff_t) >= 4);
 151
 152         off = LNET_PROC_HOFF_GET(*ppos);
 153         ver = LNET_PROC_VER_GET(*ppos);
 154
 155         LASSERT(!write);
 156
 157         if (*lenp == 0)
 158                 return 0;
 159
 160         LIBCFS_ALLOC(tmpstr, tmpsiz);
 161         if (tmpstr == NULL)
 162                 return -ENOMEM;
 163
 164         s = tmpstr; /* points to current position in tmpstr[] */
 165
 166         if (*ppos == 0) {
 167                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 168                               the_lnet.ln_routing ? "enabled" : "disabled");
 169                 LASSERT(tmpstr + tmpsiz - s > 0);
 170
 171                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 172                               "net", "hops", "priority", "state", "router");
 173                 LASSERT(tmpstr + tmpsiz - s > 0);
 174
 175                 lnet_net_lock(0);
 176                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 177                 lnet_net_unlock(0);
 178                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 179         } else {
 180                 struct list_head        *n;
 181                 struct list_head        *r;
 182                 struct lnet_route               *route = NULL;
 183                 struct lnet_remotenet   *rnet  = NULL;
 184                 int                     skip  = off - 1;
 185                 struct list_head        *rn_list;
 186                 int                     i;
 187
 188                 lnet_net_lock(0);
 189
 190                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 191                         lnet_net_unlock(0);
 192                         LIBCFS_FREE(tmpstr, tmpsiz);
 193                         return -ESTALE;
 194                 }
 195
 196                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 197                      i++) {
 198                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 199
 200                         n = rn_list->next;
 201
 202                         while (n != rn_list && route == NULL) {
 203                                 rnet = list_entry(n, struct lnet_remotenet,
 204                                                   lrn_list);
 205
 206                                 r = rnet->lrn_routes.next;
 207
 208                                 while (r != &rnet->lrn_routes) {
 209                                         struct lnet_route *re =
 210                                                 list_entry(r, struct lnet_route,
 211                                                            lr_list);
 212                                         if (skip == 0) {
 213                                                 route = re;
 214                                                 break;
 215                                         }
 216
 217                                         skip--;
 218                                         r = r->next;
 219                                 }
 220
 221                                 n = n->next;
 222                         }
 223                 }
 224
 225                 if (route != NULL) {
 226                         __u32        net        = rnet->lrn_net;
 227                         __u32 hops              = route->lr_hops;
 228                         unsigned int priority   = route->lr_priority;
 229                         lnet_nid_t   nid        = route->lr_gateway->lpni_nid;
 230                         int          alive      = lnet_is_route_alive(route);
 231
 232                         s += snprintf(s, tmpstr + tmpsiz - s,
 233                                       "%-8s %4d %8u %7s %s\n",
 234                                       libcfs_net2str(net), hops,
 235                                       priority,
 236                                       alive ? "up" : "down",
 237                                       libcfs_nid2str(nid));
 238                         LASSERT(tmpstr + tmpsiz - s > 0);
 239                 }
 240
 241                 lnet_net_unlock(0);
 242         }
 243
 244         len = s - tmpstr;     /* how many bytes was written */
 245
 246         if (len > *lenp) {    /* linux-supplied buffer is too small */
 247                 rc = -EINVAL;
 248         } else if (len > 0) { /* wrote something */
 249                 if (copy_to_user(buffer, tmpstr, len))
 250                         rc = -EFAULT;
 251                 else {
 252                         off += 1;
 253                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 254                 }
 255         }
 256
 257         LIBCFS_FREE(tmpstr, tmpsiz);
 258
 259         if (rc == 0)
 260                 *lenp = len;
 261
 262         return rc;
 263 }
 264
 265 static int
 266 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 267                   size_t *lenp, loff_t *ppos)
 268 {
 269         int        rc = 0;
 270         char      *tmpstr;
 271         char      *s;
 272         const int  tmpsiz = 256;
 273         int        len;
 274         int        ver;
 275         int        off;
 276
 277         off = LNET_PROC_HOFF_GET(*ppos);
 278         ver = LNET_PROC_VER_GET(*ppos);
 279
 280         LASSERT(!write);
 281
 282         if (*lenp == 0)
 283                 return 0;
 284
 285         LIBCFS_ALLOC(tmpstr, tmpsiz);
 286         if (tmpstr == NULL)
 287                 return -ENOMEM;
 288
 289         s = tmpstr; /* points to current position in tmpstr[] */
 290
 291         if (*ppos == 0) {
 292                 s += snprintf(s, tmpstr + tmpsiz - s,
 293                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 294                               "ref", "rtr_ref", "alive_cnt", "state",
 295                               "last_ping", "ping_sent", "deadline",
 296                               "down_ni", "router");
 297                 LASSERT(tmpstr + tmpsiz - s > 0);
 298
 299                 lnet_net_lock(0);
 300                 ver = (unsigned int)the_lnet.ln_routers_version;
 301                 lnet_net_unlock(0);
 302                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 303         } else {
 304                 struct list_head *r;
 305                 struct lnet_peer_ni *peer = NULL;
 306                 int               skip = off - 1;
 307
 308                 lnet_net_lock(0);
 309
 310                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 311                         lnet_net_unlock(0);
 312
 313                         LIBCFS_FREE(tmpstr, tmpsiz);
 314                         return -ESTALE;
 315                 }
 316
 317                 r = the_lnet.ln_routers.next;
 318
 319                 while (r != &the_lnet.ln_routers) {
 320                         struct lnet_peer_ni *lp =
 321                           list_entry(r, struct lnet_peer_ni,
 322                                      lpni_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->lpni_nid;
 335                         cfs_time_t now = cfs_time_current();
 336                         cfs_time_t deadline = peer->lpni_ping_deadline;
 337                         int nrefs     = atomic_read(&peer->lpni_refcount);
 338                         int nrtrrefs  = peer->lpni_rtr_refcount;
 339                         int alive_cnt = peer->lpni_alive_count;
 340                         int alive     = peer->lpni_alive;
 341                         int pingsent  = !peer->lpni_ping_notsent;
 342                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 343                                                      peer->lpni_ping_timestamp));
 344                         int down_ni   = 0;
 345                         struct lnet_route *rtr;
 346
 347                         if ((peer->lpni_ping_feats &
 348                              LNET_PING_FEAT_NI_STATUS) != 0) {
 349                                 list_for_each_entry(rtr, &peer->lpni_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 /* TODO: there should be no direct access to ptable. We should add a set
 403  * of APIs that give access to the ptable and its members */
 404 static int
 405 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 406                 size_t *lenp, loff_t *ppos)
 407 {
 408         const int               tmpsiz  = 256;
 409         struct lnet_peer_table  *ptable;
 410         char                    *tmpstr = NULL;
 411         char                    *s;
 412         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 413         int                     ver  = LNET_PROC_VER_GET(*ppos);
 414         int                     hash = LNET_PROC_HASH_GET(*ppos);
 415         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 416         int                     rc = 0;
 417         int                     len;
 418
 419         if (write) {
 420                 int i;
 421                 struct lnet_peer_ni *peer;
 422
 423                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
 424                         lnet_net_lock(i);
 425                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
 426                                 list_for_each_entry(peer,
 427                                                     &ptable->pt_hash[hash],
 428                                                     lpni_hashlist) {
 429                                         peer->lpni_mintxcredits =
 430                                                 peer->lpni_txcredits;
 431                                         peer->lpni_minrtrcredits =
 432                                                 peer->lpni_rtrcredits;
 433                                 }
 434                         }
 435                         lnet_net_unlock(i);
 436                 }
 437                 *ppos += *lenp;
 438                 return 0;
 439         }
 440
 441         if (*lenp == 0)
 442                 return 0;
 443
 444         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 445
 446         if (cpt >= LNET_CPT_NUMBER) {
 447                 *lenp = 0;
 448                 return 0;
 449         }
 450
 451         LIBCFS_ALLOC(tmpstr, tmpsiz);
 452         if (tmpstr == NULL)
 453                 return -ENOMEM;
 454
 455         s = tmpstr; /* points to current position in tmpstr[] */
 456
 457         if (*ppos == 0) {
 458                 s += snprintf(s, tmpstr + tmpsiz - s,
 459                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 460                               "nid", "refs", "state", "last", "max",
 461                               "rtr", "min", "tx", "min", "queue");
 462                 LASSERT(tmpstr + tmpsiz - s > 0);
 463
 464                 hoff++;
 465         } else {
 466                 struct lnet_peer_ni     *peer;
 467                 struct list_head        *p;
 468                 int                     skip;
 469
 470  again:
 471                 p = NULL;
 472                 peer = NULL;
 473                 skip = hoff - 1;
 474
 475                 lnet_net_lock(cpt);
 476                 ptable = the_lnet.ln_peer_tables[cpt];
 477                 if (hoff == 1)
 478                         ver = LNET_PROC_VERSION(ptable->pt_version);
 479
 480                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 481                         lnet_net_unlock(cpt);
 482                         LIBCFS_FREE(tmpstr, tmpsiz);
 483                         return -ESTALE;
 484                 }
 485
 486                 while (hash < LNET_PEER_HASH_SIZE) {
 487                         if (p == NULL)
 488                                 p = ptable->pt_hash[hash].next;
 489
 490                         while (p != &ptable->pt_hash[hash]) {
 491                                 struct lnet_peer_ni *lp =
 492                                   list_entry(p, struct lnet_peer_ni,
 493                                              lpni_hashlist);
 494                                 if (skip == 0) {
 495                                         peer = lp;
 496
 497                                         /* minor optimization: start from idx+1
 498                                          * on next iteration if we've just
 499                                          * drained lpni_hashlist */
 500                                         if (lp->lpni_hashlist.next ==
 501                                             &ptable->pt_hash[hash]) {
 502                                                 hoff = 1;
 503                                                 hash++;
 504                                         } else {
 505                                                 hoff++;
 506                                         }
 507
 508                                         break;
 509                                 }
 510
 511                                 skip--;
 512                                 p = lp->lpni_hashlist.next;
 513                         }
 514
 515                         if (peer != NULL)
 516                                 break;
 517
 518                         p = NULL;
 519                         hoff = 1;
 520                         hash++;
 521                 }
 522
 523                 if (peer != NULL) {
 524                         lnet_nid_t nid = peer->lpni_nid;
 525                         int nrefs = atomic_read(&peer->lpni_refcount);
 526                         int lastalive = -1;
 527                         char *aliveness = "NA";
 528                         int maxcr = (peer->lpni_net) ?
 529                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 530                         int txcr = peer->lpni_txcredits;
 531                         int mintxcr = peer->lpni_mintxcredits;
 532                         int rtrcr = peer->lpni_rtrcredits;
 533                         int minrtrcr = peer->lpni_minrtrcredits;
 534                         int txqnob = peer->lpni_txqnob;
 535
 536                         if (lnet_isrouter(peer) ||
 537                             lnet_peer_aliveness_enabled(peer))
 538                                 aliveness = peer->lpni_alive ? "up" : "down";
 539
 540                         if (lnet_peer_aliveness_enabled(peer)) {
 541                                 cfs_time_t now = cfs_time_current();
 542                                 cfs_duration_t delta;
 543
 544                                 delta = cfs_time_sub(now, peer->lpni_last_alive);
 545                                 lastalive = cfs_duration_sec(delta);
 546
 547                                 /* No need to mess up peers contents with
 548                                  * arbitrarily long integers - it suffices to
 549                                  * know that lastalive is more than 10000s old
 550                                  */
 551                                 if (lastalive >= 10000)
 552                                         lastalive = 9999;
 553                         }
 554
 555                         lnet_net_unlock(cpt);
 556
 557                         s += snprintf(s, tmpstr + tmpsiz - s,
 558                                       "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
 559                                       libcfs_nid2str(nid), nrefs, aliveness,
 560                                       lastalive, maxcr, rtrcr, minrtrcr, txcr,
 561                                       mintxcr, txqnob);
 562                         LASSERT(tmpstr + tmpsiz - s > 0);
 563
 564                 } else { /* peer is NULL */
 565                         lnet_net_unlock(cpt);
 566                 }
 567
 568                 if (hash == LNET_PEER_HASH_SIZE) {
 569                         cpt++;
 570                         hash = 0;
 571                         hoff = 1;
 572                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 573                                 goto again;
 574                 }
 575         }
 576
 577         len = s - tmpstr;     /* how many bytes was written */
 578
 579         if (len > *lenp) {    /* linux-supplied buffer is too small */
 580                 rc = -EINVAL;
 581         } else if (len > 0) { /* wrote something */
 582                 if (copy_to_user(buffer, tmpstr, len))
 583                         rc = -EFAULT;
 584                 else
 585                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 586         }
 587
 588         LIBCFS_FREE(tmpstr, tmpsiz);
 589
 590         if (rc == 0)
 591                 *lenp = len;
 592
 593         return rc;
 594 }
 595
 596 static int __proc_lnet_buffers(void *data, int write,
 597                                loff_t pos, void __user *buffer, int nob)
 598 {
 599         char            *s;
 600         char            *tmpstr;
 601         int             tmpsiz;
 602         int             idx;
 603         int             len;
 604         int             rc;
 605         int             i;
 606
 607         LASSERT(!write);
 608
 609         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 610         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 611         LIBCFS_ALLOC(tmpstr, tmpsiz);
 612         if (tmpstr == NULL)
 613                 return -ENOMEM;
 614
 615         s = tmpstr; /* points to current position in tmpstr[] */
 616
 617         s += snprintf(s, tmpstr + tmpsiz - s,
 618                       "%5s %5s %7s %7s\n",
 619                       "pages", "count", "credits", "min");
 620         LASSERT(tmpstr + tmpsiz - s > 0);
 621
 622         if (the_lnet.ln_rtrpools == NULL)
 623                 goto out; /* I'm not a router */
 624
 625         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 626                 struct lnet_rtrbufpool *rbp;
 627
 628                 lnet_net_lock(LNET_LOCK_EX);
 629                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 630                         s += snprintf(s, tmpstr + tmpsiz - s,
 631                                       "%5d %5d %7d %7d\n",
 632                                       rbp[idx].rbp_npages,
 633                                       rbp[idx].rbp_nbuffers,
 634                                       rbp[idx].rbp_credits,
 635                                       rbp[idx].rbp_mincredits);
 636                         LASSERT(tmpstr + tmpsiz - s > 0);
 637                 }
 638                 lnet_net_unlock(LNET_LOCK_EX);
 639         }
 640
 641  out:
 642         len = s - tmpstr;
 643
 644         if (pos >= min_t(int, len, strlen(tmpstr)))
 645                 rc = 0;
 646         else
 647                 rc = cfs_trace_copyout_string(buffer, nob,
 648                                               tmpstr + pos, NULL);
 649
 650         LIBCFS_FREE(tmpstr, tmpsiz);
 651         return rc;
 652 }
 653
 654 static int
 655 proc_lnet_buffers(struct ctl_table *table, int write, void __user *buffer,
 656                   size_t *lenp, loff_t *ppos)
 657 {
 658         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 659                                     __proc_lnet_buffers);
 660 }
 661
 662 static int
 663 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 664               size_t *lenp, loff_t *ppos)
 665 {
 666         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 667         int     rc = 0;
 668         char    *tmpstr;
 669         char    *s;
 670         int     len;
 671
 672         if (*lenp == 0)
 673                 return 0;
 674
 675         if (write) {
 676                 /* Just reset the min stat. */
 677                 struct lnet_ni  *ni;
 678                 struct lnet_net *net;
 679
 680                 lnet_net_lock(0);
 681
 682                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
 683                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 684                                 struct lnet_tx_queue *tq;
 685                                 int i;
 686                                 int j;
 687
 688                                 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 689                                         for (j = 0; ni->ni_cpts != NULL &&
 690                                              j < ni->ni_ncpts; j++) {
 691                                                 if (i == ni->ni_cpts[j])
 692                                                         break;
 693                                         }
 694
 695                                         if (j == ni->ni_ncpts)
 696                                                 continue;
 697
 698                                         if (i != 0)
 699                                                 lnet_net_lock(i);
 700                                         tq->tq_credits_min = tq->tq_credits;
 701                                         if (i != 0)
 702                                                 lnet_net_unlock(i);
 703                                 }
 704                         }
 705                 }
 706                 lnet_net_unlock(0);
 707                 *ppos += *lenp;
 708                 return 0;
 709         }
 710
 711         LIBCFS_ALLOC(tmpstr, tmpsiz);
 712         if (tmpstr == NULL)
 713                 return -ENOMEM;
 714
 715         s = tmpstr; /* points to current position in tmpstr[] */
 716
 717         if (*ppos == 0) {
 718                 s += snprintf(s, tmpstr + tmpsiz - s,
 719                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 720                               "nid", "status", "alive", "refs", "peer",
 721                               "rtr", "max", "tx", "min");
 722                 LASSERT (tmpstr + tmpsiz - s > 0);
 723         } else {
 724                 struct lnet_ni *ni   = NULL;
 725                 int skip = *ppos - 1;
 726
 727                 lnet_net_lock(0);
 728
 729                 ni = lnet_get_ni_idx_locked(skip);
 730
 731                 if (ni != NULL) {
 732                         struct lnet_tx_queue    *tq;
 733                         char    *stat;
 734                         time64_t now = ktime_get_real_seconds();
 735                         int     last_alive = -1;
 736                         int     i;
 737                         int     j;
 738
 739                         if (the_lnet.ln_routing)
 740                                 last_alive = now - ni->ni_last_alive;
 741
 742                         /* @lo forever alive */
 743                         if (ni->ni_net->net_lnd->lnd_type == LOLND)
 744                                 last_alive = 0;
 745
 746                         lnet_ni_lock(ni);
 747                         LASSERT(ni->ni_status != NULL);
 748                         stat = (ni->ni_status->ns_status ==
 749                                 LNET_NI_STATUS_UP) ? "up" : "down";
 750                         lnet_ni_unlock(ni);
 751
 752                         /* we actually output credits information for
 753                          * TX queue of each partition */
 754                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 755                                 for (j = 0; ni->ni_cpts != NULL &&
 756                                      j < ni->ni_ncpts; j++) {
 757                                         if (i == ni->ni_cpts[j])
 758                                                 break;
 759                                 }
 760
 761                                 if (j == ni->ni_ncpts)
 762                                         continue;
 763
 764                                 if (i != 0)
 765                                         lnet_net_lock(i);
 766
 767                                 s += snprintf(s, tmpstr + tmpsiz - s,
 768                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 769                                       libcfs_nid2str(ni->ni_nid), stat,
 770                                       last_alive, *ni->ni_refs[i],
 771                                       ni->ni_net->net_tunables.lct_peer_tx_credits,
 772                                       ni->ni_net->net_tunables.lct_peer_rtr_credits,
 773                                       tq->tq_credits_max,
 774                                       tq->tq_credits, tq->tq_credits_min);
 775                                 if (i != 0)
 776                                         lnet_net_unlock(i);
 777                         }
 778                         LASSERT(tmpstr + tmpsiz - s > 0);
 779                 }
 780
 781                 lnet_net_unlock(0);
 782         }
 783
 784         len = s - tmpstr;     /* how many bytes was written */
 785
 786         if (len > *lenp) {    /* linux-supplied buffer is too small */
 787                 rc = -EINVAL;
 788         } else if (len > 0) { /* wrote something */
 789                 if (copy_to_user(buffer, tmpstr, len))
 790                         rc = -EFAULT;
 791                 else
 792                         *ppos += 1;
 793         }
 794
 795         LIBCFS_FREE(tmpstr, tmpsiz);
 796
 797         if (rc == 0)
 798                 *lenp = len;
 799
 800         return rc;
 801 }
 802
 803 struct lnet_portal_rotors {
 804         int             pr_value;
 805         const char      *pr_name;
 806         const char      *pr_desc;
 807 };
 808
 809 static struct lnet_portal_rotors        portal_rotors[] = {
 810         {
 811                 .pr_value = LNET_PTL_ROTOR_OFF,
 812                 .pr_name  = "OFF",
 813                 .pr_desc  = "Turn off message rotor for wildcard portals"
 814         },
 815         {
 816                 .pr_value = LNET_PTL_ROTOR_ON,
 817                 .pr_name  = "ON",
 818                 .pr_desc  = "round-robin dispatch all PUT messages for "
 819                             "wildcard portals"
 820         },
 821         {
 822                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 823                 .pr_name  = "RR_RT",
 824                 .pr_desc  = "round-robin dispatch routed PUT message for "
 825                             "wildcard portals"
 826         },
 827         {
 828                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 829                 .pr_name  = "HASH_RT",
 830                 .pr_desc  = "dispatch routed PUT message by hashing source "
 831                             "NID for wildcard portals"
 832         },
 833         {
 834                 .pr_value = -1,
 835                 .pr_name  = NULL,
 836                 .pr_desc  = NULL
 837         },
 838 };
 839
 840 static int __proc_lnet_portal_rotor(void *data, int write,
 841                                     loff_t pos, void __user *buffer, int nob)
 842 {
 843         const int       buf_len = 128;
 844         char            *buf;
 845         char            *tmp;
 846         int             rc;
 847         int             i;
 848
 849         LIBCFS_ALLOC(buf, buf_len);
 850         if (buf == NULL)
 851                 return -ENOMEM;
 852
 853         if (!write) {
 854                 lnet_res_lock(0);
 855
 856                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 857                         if (portal_rotors[i].pr_value == portal_rotor)
 858                                 break;
 859                 }
 860
 861                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 862                 lnet_res_unlock(0);
 863
 864                 rc = snprintf(buf, buf_len,
 865                               "{\n\tportals: all\n"
 866                               "\trotor: %s\n\tdescription: %s\n}",
 867                               portal_rotors[i].pr_name,
 868                               portal_rotors[i].pr_desc);
 869
 870                 if (pos >= min_t(int, rc, buf_len)) {
 871                         rc = 0;
 872                 } else {
 873                         rc = cfs_trace_copyout_string(buffer, nob,
 874                                         buf + pos, "\n");
 875                 }
 876                 goto out;
 877         }
 878
 879         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 880         if (rc < 0)
 881                 goto out;
 882
 883         tmp = cfs_trimwhite(buf);
 884
 885         rc = -EINVAL;
 886         lnet_res_lock(0);
 887         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 888                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 889                                 strlen(portal_rotors[i].pr_name)) == 0) {
 890                         portal_rotor = portal_rotors[i].pr_value;
 891                         rc = 0;
 892                         break;
 893                 }
 894         }
 895         lnet_res_unlock(0);
 896 out:
 897         LIBCFS_FREE(buf, buf_len);
 898         return rc;
 899 }
 900
 901 static int
 902 proc_lnet_portal_rotor(struct ctl_table *table, int write, void __user *buffer,
 903                        size_t *lenp, loff_t *ppos)
 904 {
 905         return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
 906                                     __proc_lnet_portal_rotor);
 907 }
 908
 909
 910 static struct ctl_table lnet_table[] = {
 911         /*
 912          * NB No .strategy entries have been provided since sysctl(8) prefers
 913          * to go via /proc for portability.
 914          */
 915         {
 916                 INIT_CTL_NAME
 917                 .procname       = "stats",
 918                 .mode           = 0644,
 919                 .proc_handler   = &proc_lnet_stats,
 920         },
 921         {
 922                 INIT_CTL_NAME
 923                 .procname       = "routes",
 924                 .mode           = 0444,
 925                 .proc_handler   = &proc_lnet_routes,
 926         },
 927         {
 928                 INIT_CTL_NAME
 929                 .procname       = "routers",
 930                 .mode           = 0444,
 931                 .proc_handler   = &proc_lnet_routers,
 932         },
 933         {
 934                 INIT_CTL_NAME
 935                 .procname       = "peers",
 936                 .mode           = 0644,
 937                 .proc_handler   = &proc_lnet_peers,
 938         },
 939         {
 940                 INIT_CTL_NAME
 941                 .procname       = "buffers",
 942                 .mode           = 0444,
 943                 .proc_handler   = &proc_lnet_buffers,
 944         },
 945         {
 946                 INIT_CTL_NAME
 947                 .procname       = "nis",
 948                 .mode           = 0644,
 949                 .proc_handler   = &proc_lnet_nis,
 950         },
 951         {
 952                 INIT_CTL_NAME
 953                 .procname       = "portal_rotor",
 954                 .mode           = 0644,
 955                 .proc_handler   = &proc_lnet_portal_rotor,
 956         },
 957         { 0 }
 958 };
 959
 960 void lnet_router_debugfs_init(void)
 961 {
 962         lnet_insert_debugfs(lnet_table, NULL);
 963 }