lnet/lnet/lnet_debugfs.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 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  31 /* NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  32  */
  33 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  34 /* change version, 16 bits or 8 bits */
  35 #define LNET_PROC_VER_BITS              \
  36         clamp_t(int, LNET_LOFFT_BITS / 4, 8, 16)
  37
  38 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  39 /* bits for peer hash offset
  40  * NB: we don't use the highest bit of *ppos because it's signed
  41  */
  42 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  43                                  LNET_PROC_CPT_BITS -    \
  44                                  LNET_PROC_VER_BITS -    \
  45                                  LNET_PROC_HASH_BITS - 1)
  46 /* bits for hash index + position */
  47 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  48 /* bits for peer hash table + hash version */
  49 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  50
  51 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  52 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  53 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  54 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  55
  56 #define LNET_PROC_CPT_GET(pos)                          \
  57         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  58
  59 #define LNET_PROC_VER_GET(pos)                          \
  60         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  61
  62 #define LNET_PROC_HASH_GET(pos)                         \
  63         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  64
  65 #define LNET_PROC_HOFF_GET(pos)                         \
  66         (int)((pos) & LNET_PROC_HOFF_MASK)
  67
  68 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  69         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  70         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  71         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  72         ((off) & LNET_PROC_HOFF_MASK))
  73
  74 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  75
  76 static int proc_cpt_table(struct ctl_table *table, int write,
  77                           void __user *buffer, size_t *lenp, loff_t *ppos)
  78 {
  79         size_t nob = *lenp;
  80         loff_t pos = *ppos;
  81         char *buf = NULL;
  82         int len = 4096;
  83         int rc  = 0;
  84
  85         if (write)
  86                 return -EPERM;
  87
  88         while (1) {
  89                 LIBCFS_ALLOC(buf, len);
  90                 if (!buf)
  91                         return -ENOMEM;
  92
  93                 rc = cfs_cpt_table_print(cfs_cpt_tab, buf, len);
  94                 if (rc >= 0)
  95                         break;
  96
  97                 if (rc == -EFBIG) {
  98                         LIBCFS_FREE(buf, len);
  99                         len <<= 1;
 100                         continue;
 101                 }
 102                 goto out;
 103         }
 104
 105         if (pos >= rc) {
 106                 rc = 0;
 107                 goto out;
 108         }
 109
 110         rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
 111 out:
 112         if (buf)
 113                 LIBCFS_FREE(buf, len);
 114         return rc;
 115 }
 116
 117 static int proc_cpt_distance(struct ctl_table *table, int write,
 118                              void __user *buffer, size_t *lenp, loff_t *ppos)
 119 {
 120         size_t nob = *lenp;
 121         loff_t pos = *ppos;
 122         char *buf = NULL;
 123         int len = 4096;
 124         int rc  = 0;
 125
 126         if (write)
 127                 return -EPERM;
 128
 129         while (1) {
 130                 LIBCFS_ALLOC(buf, len);
 131                 if (!buf)
 132                         return -ENOMEM;
 133
 134                 rc = cfs_cpt_distance_print(cfs_cpt_tab, buf, len);
 135                 if (rc >= 0)
 136                         break;
 137
 138                 if (rc == -EFBIG) {
 139                         LIBCFS_FREE(buf, len);
 140                         len <<= 1;
 141                         continue;
 142                 }
 143                 goto out;
 144         }
 145
 146         if (pos >= rc) {
 147                 rc = 0;
 148                 goto out;
 149         }
 150
 151         rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
 152 out:
 153         if (buf)
 154                 LIBCFS_FREE(buf, len);
 155         return rc;
 156 }
 157
 158 static int proc_lnet_stats(struct ctl_table *table, int write,
 159                            void __user *buffer, size_t *lenp, loff_t *ppos)
 160 {
 161         int rc;
 162         struct lnet_counters *ctrs;
 163         struct lnet_counters_common common;
 164         size_t nob = *lenp;
 165         loff_t pos = *ppos;
 166         int len;
 167         char tmpstr[256]; /* 7 %u and 4 u64 */
 168
 169         if (write) {
 170                 lnet_counters_reset();
 171                 return 0;
 172         }
 173
 174         /* read */
 175
 176         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
 177         if (ctrs == NULL)
 178                 return -ENOMEM;
 179
 180         rc = lnet_counters_get(ctrs);
 181         if (rc)
 182                 goto out_no_ctrs;
 183
 184         common = ctrs->lct_common;
 185
 186         len = scnprintf(tmpstr, sizeof(tmpstr),
 187                         "%u %u %u %u %u %u %u %llu %llu "
 188                         "%llu %llu",
 189                         common.lcc_msgs_alloc, common.lcc_msgs_max,
 190                         common.lcc_errors,
 191                         common.lcc_send_count, common.lcc_recv_count,
 192                         common.lcc_route_count, common.lcc_drop_count,
 193                         common.lcc_send_length, common.lcc_recv_length,
 194                         common.lcc_route_length, common.lcc_drop_length);
 195
 196         if (pos >= len)
 197                 rc = 0;
 198         else
 199                 rc = cfs_trace_copyout_string(buffer, nob,
 200                                               tmpstr + pos, "\n");
 201 out_no_ctrs:
 202         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 203         return rc;
 204 }
 205
 206 static int
 207 proc_lnet_routes(struct ctl_table *table, int write, void __user *buffer,
 208                  size_t *lenp, loff_t *ppos)
 209 {
 210         const int       tmpsiz = 256;
 211         char            *tmpstr;
 212         char            *s;
 213         int             rc = 0;
 214         int             len;
 215         int             ver;
 216         int             off;
 217
 218         BUILD_BUG_ON(sizeof(loff_t) < 4);
 219
 220         off = LNET_PROC_HOFF_GET(*ppos);
 221         ver = LNET_PROC_VER_GET(*ppos);
 222
 223         LASSERT(!write);
 224
 225         if (*lenp == 0)
 226                 return 0;
 227
 228         LIBCFS_ALLOC(tmpstr, tmpsiz);
 229         if (tmpstr == NULL)
 230                 return -ENOMEM;
 231
 232         s = tmpstr; /* points to current position in tmpstr[] */
 233
 234         if (*ppos == 0) {
 235                 s += scnprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 236                                the_lnet.ln_routing ? "enabled" : "disabled");
 237                 LASSERT(tmpstr + tmpsiz - s > 0);
 238
 239                 s += scnprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 240                                "net", "hops", "priority", "state", "router");
 241                 LASSERT(tmpstr + tmpsiz - s > 0);
 242
 243                 lnet_net_lock(0);
 244                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 245                 lnet_net_unlock(0);
 246                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 247         } else {
 248                 struct list_head        *n;
 249                 struct list_head        *r;
 250                 struct lnet_route               *route = NULL;
 251                 struct lnet_remotenet   *rnet  = NULL;
 252                 int                     skip  = off - 1;
 253                 struct list_head        *rn_list;
 254                 int                     i;
 255
 256                 lnet_net_lock(0);
 257
 258                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 259                         lnet_net_unlock(0);
 260                         LIBCFS_FREE(tmpstr, tmpsiz);
 261                         return -ESTALE;
 262                 }
 263
 264                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 265                      i++) {
 266                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 267
 268                         n = rn_list->next;
 269
 270                         while (n != rn_list && route == NULL) {
 271                                 rnet = list_entry(n, struct lnet_remotenet,
 272                                                   lrn_list);
 273
 274                                 r = rnet->lrn_routes.next;
 275
 276                                 while (r != &rnet->lrn_routes) {
 277                                         struct lnet_route *re =
 278                                                 list_entry(r, struct lnet_route,
 279                                                            lr_list);
 280                                         if (skip == 0) {
 281                                                 route = re;
 282                                                 break;
 283                                         }
 284
 285                                         skip--;
 286                                         r = r->next;
 287                                 }
 288
 289                                 n = n->next;
 290                         }
 291                 }
 292
 293                 if (route != NULL) {
 294                         __u32 net = rnet->lrn_net;
 295                         __u32 hops = route->lr_hops;
 296                         unsigned int priority = route->lr_priority;
 297                         int alive = lnet_is_route_alive(route);
 298
 299                         s += scnprintf(s, tmpstr + tmpsiz - s,
 300                                        "%-8s %4d %8u %7s %s\n",
 301                                        libcfs_net2str(net), hops,
 302                                        priority,
 303                                        alive ? "up" : "down",
 304                                        libcfs_nidstr(&route->lr_nid));
 305                         LASSERT(tmpstr + tmpsiz - s > 0);
 306                 }
 307
 308                 lnet_net_unlock(0);
 309         }
 310
 311         len = s - tmpstr;     /* how many bytes was written */
 312
 313         if (len > *lenp) {    /* linux-supplied buffer is too small */
 314                 rc = -EINVAL;
 315         } else if (len > 0) { /* wrote something */
 316                 if (copy_to_user(buffer, tmpstr, len))
 317                         rc = -EFAULT;
 318                 else {
 319                         off += 1;
 320                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 321                 }
 322         }
 323
 324         LIBCFS_FREE(tmpstr, tmpsiz);
 325
 326         if (rc == 0)
 327                 *lenp = len;
 328
 329         return rc;
 330 }
 331
 332 static int
 333 proc_lnet_routers(struct ctl_table *table, int write, void __user *buffer,
 334                   size_t *lenp, loff_t *ppos)
 335 {
 336         int        rc = 0;
 337         char      *tmpstr;
 338         char      *s;
 339         const int  tmpsiz = 256;
 340         int        len;
 341         int        ver;
 342         int        off;
 343
 344         off = LNET_PROC_HOFF_GET(*ppos);
 345         ver = LNET_PROC_VER_GET(*ppos);
 346
 347         LASSERT(!write);
 348
 349         if (*lenp == 0)
 350                 return 0;
 351
 352         LIBCFS_ALLOC(tmpstr, tmpsiz);
 353         if (tmpstr == NULL)
 354                 return -ENOMEM;
 355
 356         s = tmpstr; /* points to current position in tmpstr[] */
 357
 358         if (*ppos == 0) {
 359                 s += scnprintf(s, tmpstr + tmpsiz - s,
 360                                "%-4s %7s %5s %s\n",
 361                                "ref", "rtr_ref", "alive", "router");
 362                 LASSERT(tmpstr + tmpsiz - s > 0);
 363
 364                 lnet_net_lock(0);
 365                 ver = (unsigned int)the_lnet.ln_routers_version;
 366                 lnet_net_unlock(0);
 367                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 368         } else {
 369                 struct list_head *r;
 370                 struct lnet_peer *peer = NULL;
 371                 int               skip = off - 1;
 372
 373                 lnet_net_lock(0);
 374
 375                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 376                         lnet_net_unlock(0);
 377
 378                         LIBCFS_FREE(tmpstr, tmpsiz);
 379                         return -ESTALE;
 380                 }
 381
 382                 r = the_lnet.ln_routers.next;
 383
 384                 while (r != &the_lnet.ln_routers) {
 385                         struct lnet_peer *lp =
 386                           list_entry(r, struct lnet_peer,
 387                                      lp_rtr_list);
 388
 389                         if (skip == 0) {
 390                                 peer = lp;
 391                                 break;
 392                         }
 393
 394                         skip--;
 395                         r = r->next;
 396                 }
 397
 398                 if (peer != NULL) {
 399                         struct lnet_nid *nid = &peer->lp_primary_nid;
 400                         int nrefs     = atomic_read(&peer->lp_refcount);
 401                         int nrtrrefs  = peer->lp_rtr_refcount;
 402                         int alive     = lnet_is_gateway_alive(peer);
 403
 404                         s += scnprintf(s, tmpstr + tmpsiz - s,
 405                                        "%-4d %7d %5s %s\n",
 406                                        nrefs, nrtrrefs,
 407                                        alive ? "up" : "down",
 408                                        libcfs_nidstr(nid));
 409                 }
 410
 411                 lnet_net_unlock(0);
 412         }
 413
 414         len = s - tmpstr;     /* how many bytes was written */
 415
 416         if (len > *lenp) {    /* linux-supplied buffer is too small */
 417                 rc = -EINVAL;
 418         } else if (len > 0) { /* wrote something */
 419                 if (copy_to_user(buffer, tmpstr, len))
 420                         rc = -EFAULT;
 421                 else {
 422                         off += 1;
 423                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 424                 }
 425         }
 426
 427         LIBCFS_FREE(tmpstr, tmpsiz);
 428
 429         if (rc == 0)
 430                 *lenp = len;
 431
 432         return rc;
 433 }
 434
 435 /* TODO: there should be no direct access to ptable. We should add a set
 436  * of APIs that give access to the ptable and its members */
 437 static int
 438 proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 439                 size_t *lenp, loff_t *ppos)
 440 {
 441         const int               tmpsiz  = 256;
 442         struct lnet_peer_table  *ptable;
 443         char                    *tmpstr = NULL;
 444         char                    *s;
 445         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 446         int                     ver  = LNET_PROC_VER_GET(*ppos);
 447         int                     hash = LNET_PROC_HASH_GET(*ppos);
 448         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 449         int                     rc = 0;
 450         int                     len;
 451
 452         if (write) {
 453                 int i;
 454                 struct lnet_peer_ni *peer;
 455
 456                 cfs_percpt_for_each(ptable, i, the_lnet.ln_peer_tables) {
 457                         lnet_net_lock(i);
 458                         for (hash = 0; hash < LNET_PEER_HASH_SIZE; hash++) {
 459                                 list_for_each_entry(peer,
 460                                                     &ptable->pt_hash[hash],
 461                                                     lpni_hashlist) {
 462                                         peer->lpni_mintxcredits =
 463                                                 peer->lpni_txcredits;
 464                                         peer->lpni_minrtrcredits =
 465                                                 peer->lpni_rtrcredits;
 466                                 }
 467                         }
 468                         lnet_net_unlock(i);
 469                 }
 470                 *ppos += *lenp;
 471                 return 0;
 472         }
 473
 474         if (*lenp == 0)
 475                 return 0;
 476
 477         BUILD_BUG_ON(LNET_PROC_HASH_BITS < LNET_PEER_HASH_BITS);
 478
 479         if (cpt >= LNET_CPT_NUMBER) {
 480                 *lenp = 0;
 481                 return 0;
 482         }
 483
 484         LIBCFS_ALLOC(tmpstr, tmpsiz);
 485         if (tmpstr == NULL)
 486                 return -ENOMEM;
 487
 488         s = tmpstr; /* points to current position in tmpstr[] */
 489
 490         if (*ppos == 0) {
 491                 s += scnprintf(s, tmpstr + tmpsiz - s,
 492                                "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 493                                "nid", "refs", "state", "last", "max",
 494                                "rtr", "min", "tx", "min", "queue");
 495                 LASSERT(tmpstr + tmpsiz - s > 0);
 496
 497                 hoff++;
 498         } else {
 499                 struct lnet_peer_ni     *peer;
 500                 struct list_head        *p;
 501                 int                     skip;
 502
 503  again:
 504                 p = NULL;
 505                 peer = NULL;
 506                 skip = hoff - 1;
 507
 508                 lnet_net_lock(cpt);
 509                 ptable = the_lnet.ln_peer_tables[cpt];
 510                 if (hoff == 1)
 511                         ver = LNET_PROC_VERSION(ptable->pt_version);
 512
 513                 if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
 514                         lnet_net_unlock(cpt);
 515                         LIBCFS_FREE(tmpstr, tmpsiz);
 516                         return -ESTALE;
 517                 }
 518
 519                 while (hash < LNET_PEER_HASH_SIZE) {
 520                         if (p == NULL)
 521                                 p = ptable->pt_hash[hash].next;
 522
 523                         while (p != &ptable->pt_hash[hash]) {
 524                                 struct lnet_peer_ni *lp =
 525                                   list_entry(p, struct lnet_peer_ni,
 526                                              lpni_hashlist);
 527                                 if (skip == 0) {
 528                                         peer = lp;
 529
 530                                         /* minor optimization: start from idx+1
 531                                          * on next iteration if we've just
 532                                          * drained lpni_hashlist */
 533                                         if (lp->lpni_hashlist.next ==
 534                                             &ptable->pt_hash[hash]) {
 535                                                 hoff = 1;
 536                                                 hash++;
 537                                         } else {
 538                                                 hoff++;
 539                                         }
 540
 541                                         break;
 542                                 }
 543
 544                                 skip--;
 545                                 p = lp->lpni_hashlist.next;
 546                         }
 547
 548                         if (peer != NULL)
 549                                 break;
 550
 551                         p = NULL;
 552                         hoff = 1;
 553                         hash++;
 554                 }
 555
 556                 if (peer != NULL) {
 557                         struct lnet_nid nid = peer->lpni_nid;
 558                         int nrefs = kref_read(&peer->lpni_kref);
 559                         time64_t lastalive = -1;
 560                         char *aliveness = "NA";
 561                         int maxcr = (peer->lpni_net) ?
 562                           peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 563                         int txcr = peer->lpni_txcredits;
 564                         int mintxcr = peer->lpni_mintxcredits;
 565                         int rtrcr = peer->lpni_rtrcredits;
 566                         int minrtrcr = peer->lpni_minrtrcredits;
 567                         int txqnob = peer->lpni_txqnob;
 568
 569                         if (lnet_isrouter(peer) ||
 570                             lnet_peer_aliveness_enabled(peer))
 571                                 aliveness = lnet_is_peer_ni_alive(peer) ?
 572                                         "up" : "down";
 573
 574                         lnet_net_unlock(cpt);
 575
 576                         s += scnprintf(s, tmpstr + tmpsiz - s,
 577                                        "%-24s %4d %5s %5lld %5d %5d %5d %5d %5d %d\n",
 578                                        libcfs_nidstr(&nid), nrefs, aliveness,
 579                                        lastalive, maxcr, rtrcr, minrtrcr, txcr,
 580                                        mintxcr, txqnob);
 581                         LASSERT(tmpstr + tmpsiz - s > 0);
 582
 583                 } else { /* peer is NULL */
 584                         lnet_net_unlock(cpt);
 585                 }
 586
 587                 if (hash == LNET_PEER_HASH_SIZE) {
 588                         cpt++;
 589                         hash = 0;
 590                         hoff = 1;
 591                         if (peer == NULL && cpt < LNET_CPT_NUMBER)
 592                                 goto again;
 593                 }
 594         }
 595
 596         len = s - tmpstr;     /* how many bytes was written */
 597
 598         if (len > *lenp) {    /* linux-supplied buffer is too small */
 599                 rc = -EINVAL;
 600         } else if (len > 0) { /* wrote something */
 601                 if (copy_to_user(buffer, tmpstr, len))
 602                         rc = -EFAULT;
 603                 else
 604                         *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
 605         }
 606
 607         LIBCFS_FREE(tmpstr, tmpsiz);
 608
 609         if (rc == 0)
 610                 *lenp = len;
 611
 612         return rc;
 613 }
 614
 615 static int proc_lnet_buffers(struct ctl_table *table, int write,
 616                              void __user *buffer, size_t *lenp, loff_t *ppos)
 617 {
 618         size_t nob = *lenp;
 619         loff_t pos = *ppos;
 620         char            *s;
 621         char            *tmpstr;
 622         int             tmpsiz;
 623         int             idx;
 624         int             len;
 625         int             rc;
 626         int             i;
 627
 628         LASSERT(!write);
 629
 630         /* (4 %d) * 4 * LNET_CPT_NUMBER */
 631         tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
 632         LIBCFS_ALLOC(tmpstr, tmpsiz);
 633         if (tmpstr == NULL)
 634                 return -ENOMEM;
 635
 636         s = tmpstr; /* points to current position in tmpstr[] */
 637
 638         s += scnprintf(s, tmpstr + tmpsiz - s,
 639                        "%5s %5s %7s %7s\n",
 640                        "pages", "count", "credits", "min");
 641         LASSERT(tmpstr + tmpsiz - s > 0);
 642
 643         if (the_lnet.ln_rtrpools == NULL)
 644                 goto out; /* I'm not a router */
 645
 646         for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
 647                 struct lnet_rtrbufpool *rbp;
 648
 649                 lnet_net_lock(LNET_LOCK_EX);
 650                 cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
 651                         s += scnprintf(s, tmpstr + tmpsiz - s,
 652                                        "%5d %5d %7d %7d\n",
 653                                        rbp[idx].rbp_npages,
 654                                        rbp[idx].rbp_nbuffers,
 655                                        rbp[idx].rbp_credits,
 656                                        rbp[idx].rbp_mincredits);
 657                         LASSERT(tmpstr + tmpsiz - s > 0);
 658                 }
 659                 lnet_net_unlock(LNET_LOCK_EX);
 660         }
 661
 662  out:
 663         len = s - tmpstr;
 664
 665         if (pos >= min_t(int, len, strlen(tmpstr)))
 666                 rc = 0;
 667         else
 668                 rc = cfs_trace_copyout_string(buffer, nob,
 669                                               tmpstr + pos, NULL);
 670
 671         LIBCFS_FREE(tmpstr, tmpsiz);
 672         return rc;
 673 }
 674
 675 static int
 676 proc_lnet_nis(struct ctl_table *table, int write, void __user *buffer,
 677               size_t *lenp, loff_t *ppos)
 678 {
 679         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 680         int     rc = 0;
 681         char    *tmpstr;
 682         char    *s;
 683         int     len;
 684
 685         if (*lenp == 0)
 686                 return 0;
 687
 688         if (write) {
 689                 /* Just reset the min stat. */
 690                 struct lnet_ni  *ni;
 691                 struct lnet_net *net;
 692
 693                 lnet_net_lock(0);
 694
 695                 list_for_each_entry(net, &the_lnet.ln_nets, net_list) {
 696                         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 697                                 struct lnet_tx_queue *tq;
 698                                 int i;
 699                                 int j;
 700
 701                                 cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 702                                         for (j = 0; ni->ni_cpts != NULL &&
 703                                              j < ni->ni_ncpts; j++) {
 704                                                 if (i == ni->ni_cpts[j])
 705                                                         break;
 706                                         }
 707
 708                                         if (j == ni->ni_ncpts)
 709                                                 continue;
 710
 711                                         if (i != 0)
 712                                                 lnet_net_lock(i);
 713                                         tq->tq_credits_min = tq->tq_credits;
 714                                         if (i != 0)
 715                                                 lnet_net_unlock(i);
 716                                 }
 717                         }
 718                 }
 719                 lnet_net_unlock(0);
 720                 *ppos += *lenp;
 721                 return 0;
 722         }
 723
 724         LIBCFS_ALLOC(tmpstr, tmpsiz);
 725         if (tmpstr == NULL)
 726                 return -ENOMEM;
 727
 728         s = tmpstr; /* points to current position in tmpstr[] */
 729
 730         if (*ppos == 0) {
 731                 s += scnprintf(s, tmpstr + tmpsiz - s,
 732                                "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 733                                "nid", "status", "alive", "refs", "peer",
 734                                "rtr", "max", "tx", "min");
 735                 LASSERT (tmpstr + tmpsiz - s > 0);
 736         } else {
 737                 struct lnet_ni *ni   = NULL;
 738                 int skip = *ppos - 1;
 739
 740                 lnet_net_lock(0);
 741
 742                 ni = lnet_get_ni_idx_locked(skip);
 743
 744                 if (ni != NULL) {
 745                         struct lnet_tx_queue *tq;
 746                         char *stat;
 747                         time64_t now = ktime_get_seconds();
 748                         time64_t last_alive = -1;
 749                         int i;
 750                         int j;
 751
 752                         if (the_lnet.ln_routing)
 753                                 last_alive = now - ni->ni_net->net_last_alive;
 754
 755                         lnet_ni_lock(ni);
 756                         LASSERT(ni->ni_status != NULL);
 757                         stat = (lnet_ni_get_status_locked(ni) ==
 758                                 LNET_NI_STATUS_UP) ? "up" : "down";
 759                         lnet_ni_unlock(ni);
 760
 761                         /* @lo forever alive */
 762                         if (ni->ni_net->net_lnd->lnd_type == LOLND) {
 763                                 last_alive = 0;
 764                                 stat = "up";
 765                         }
 766
 767                         /* we actually output credits information for
 768                          * TX queue of each partition */
 769                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 770                                 for (j = 0; ni->ni_cpts != NULL &&
 771                                      j < ni->ni_ncpts; j++) {
 772                                         if (i == ni->ni_cpts[j])
 773                                                 break;
 774                                 }
 775
 776                                 if (j == ni->ni_ncpts)
 777                                         continue;
 778
 779                                 if (i != 0)
 780                                         lnet_net_lock(i);
 781
 782                                 s += scnprintf(s, tmpstr + tmpsiz - s,
 783                                        "%-24s %6s %5lld %4d %4d %4d %5d %5d %5d\n",
 784                                        libcfs_nidstr(&ni->ni_nid), stat,
 785                                        last_alive, *ni->ni_refs[i],
 786                                        ni->ni_net->net_tunables.lct_peer_tx_credits,
 787                                        ni->ni_net->net_tunables.lct_peer_rtr_credits,
 788                                        tq->tq_credits_max,
 789                                        tq->tq_credits, tq->tq_credits_min);
 790                                 if (i != 0)
 791                                         lnet_net_unlock(i);
 792                         }
 793                         LASSERT(tmpstr + tmpsiz - s > 0);
 794                 }
 795
 796                 lnet_net_unlock(0);
 797         }
 798
 799         len = s - tmpstr;     /* how many bytes was written */
 800
 801         if (len > *lenp) {    /* linux-supplied buffer is too small */
 802                 rc = -EINVAL;
 803         } else if (len > 0) { /* wrote something */
 804                 if (copy_to_user(buffer, tmpstr, len))
 805                         rc = -EFAULT;
 806                 else
 807                         *ppos += 1;
 808         }
 809
 810         LIBCFS_FREE(tmpstr, tmpsiz);
 811
 812         if (rc == 0)
 813                 *lenp = len;
 814
 815         return rc;
 816 }
 817
 818 struct lnet_portal_rotors {
 819         int             pr_value;
 820         const char      *pr_name;
 821         const char      *pr_desc;
 822 };
 823
 824 static struct lnet_portal_rotors        portal_rotors[] = {
 825         {
 826                 .pr_value = LNET_PTL_ROTOR_OFF,
 827                 .pr_name  = "OFF",
 828                 .pr_desc  = "Turn off message rotor for wildcard portals"
 829         },
 830         {
 831                 .pr_value = LNET_PTL_ROTOR_ON,
 832                 .pr_name  = "ON",
 833                 .pr_desc  = "round-robin dispatch all PUT messages for "
 834                             "wildcard portals"
 835         },
 836         {
 837                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 838                 .pr_name  = "RR_RT",
 839                 .pr_desc  = "round-robin dispatch routed PUT message for "
 840                             "wildcard portals"
 841         },
 842         {
 843                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 844                 .pr_name  = "HASH_RT",
 845                 .pr_desc  = "dispatch routed PUT message by hashing source "
 846                             "NID for wildcard portals"
 847         },
 848         {
 849                 .pr_value = -1,
 850                 .pr_name  = NULL,
 851                 .pr_desc  = NULL
 852         },
 853 };
 854
 855 static int proc_lnet_portal_rotor(struct ctl_table *table, int write,
 856                                   void __user *buffer, size_t *lenp,
 857                                   loff_t *ppos)
 858 {
 859         const int       buf_len = 128;
 860         size_t nob = *lenp;
 861         loff_t pos = *ppos;
 862         char            *buf;
 863         char            *tmp;
 864         int             rc;
 865         int             i;
 866
 867         if (!write) {
 868                 LIBCFS_ALLOC(buf, buf_len);
 869                 if (buf == NULL)
 870                         return -ENOMEM;
 871
 872                 lnet_res_lock(0);
 873
 874                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 875                         if (portal_rotors[i].pr_value == portal_rotor)
 876                                 break;
 877                 }
 878
 879                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 880                 lnet_res_unlock(0);
 881
 882                 rc = scnprintf(buf, buf_len,
 883                                "{\n\tportals: all\n"
 884                                "\trotor: %s\n\tdescription: %s\n}",
 885                                portal_rotors[i].pr_name,
 886                                portal_rotors[i].pr_desc);
 887
 888                 if (pos >= min_t(int, rc, buf_len)) {
 889                         rc = 0;
 890                 } else {
 891                         rc = cfs_trace_copyout_string(buffer, nob,
 892                                                       buf + pos, "\n");
 893                 }
 894                 LIBCFS_FREE(buf, buf_len);
 895
 896                 return rc;
 897         }
 898
 899         buf = memdup_user_nul(buffer, nob);
 900         if (IS_ERR(buf))
 901                 return PTR_ERR(buf);
 902
 903         tmp = strim(buf);
 904
 905         rc = -EINVAL;
 906         lnet_res_lock(0);
 907         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 908                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 909                                 strlen(portal_rotors[i].pr_name)) == 0) {
 910                         portal_rotor = portal_rotors[i].pr_value;
 911                         rc = 0;
 912                         break;
 913                 }
 914         }
 915         lnet_res_unlock(0);
 916         kfree(buf);
 917
 918         return rc;
 919 }
 920
 921 static struct ctl_table lnet_table[] = {
 922         /*
 923          * NB No .strategy entries have been provided since sysctl(8) prefers
 924          * to go via /proc for portability.
 925          */
 926         {
 927                 .procname       = "cpu_partition_table",
 928                 .maxlen         = 128,
 929                 .mode           = 0444,
 930                 .proc_handler   = &proc_cpt_table,
 931         },
 932         {
 933                 .procname       = "cpu_partition_distance",
 934                 .maxlen         = 128,
 935                 .mode           = 0444,
 936                 .proc_handler   = &proc_cpt_distance,
 937         },
 938         {
 939                 .procname       = "stats",
 940                 .mode           = 0644,
 941                 .proc_handler   = &proc_lnet_stats,
 942         },
 943         {
 944                 .procname       = "routes",
 945                 .mode           = 0444,
 946                 .proc_handler   = &proc_lnet_routes,
 947         },
 948         {
 949                 .procname       = "routers",
 950                 .mode           = 0444,
 951                 .proc_handler   = &proc_lnet_routers,
 952         },
 953         {
 954                 .procname       = "peers",
 955                 .mode           = 0644,
 956                 .proc_handler   = &proc_lnet_peers,
 957         },
 958         {
 959                 .procname       = "buffers",
 960                 .mode           = 0444,
 961                 .proc_handler   = &proc_lnet_buffers,
 962         },
 963         {
 964                 .procname       = "nis",
 965                 .mode           = 0644,
 966                 .proc_handler   = &proc_lnet_nis,
 967         },
 968         {
 969                 .procname       = "portal_rotor",
 970                 .mode           = 0644,
 971                 .proc_handler   = &proc_lnet_portal_rotor,
 972         },
 973         {
 974                 .procname       = "lnet_lnd_timeout",
 975                 .data           = &lnet_lnd_timeout,
 976                 .maxlen         = sizeof(lnet_lnd_timeout),
 977                 .mode           = 0444,
 978                 .proc_handler   = &debugfs_doint,
 979         },
 980         { .procname = NULL }
 981 };
 982
 983 static void *debugfs_state;
 984
 985 void lnet_router_debugfs_init(void)
 986 {
 987         lnet_insert_debugfs(lnet_table, THIS_MODULE,
 988                             &debugfs_state);
 989 }
 990
 991 void lnet_router_debugfs_fini(void)
 992 {
 993         lnet_remove_debugfs(lnet_table);
 994 }
 995 void lnet_router_exit(void)
 996 {
 997         lnet_debugfs_fini(&debugfs_state);
 998 }