kernel/drivers/staging/lustre/lnet/lnet/router_proc.c

   1 /*
   2  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Copyright (c) 2011, 2012, Intel Corporation.
   5  *
   6  *   This file is part of Portals
   7  *   http://sourceforge.net/projects/sandiaportals/
   8  *
   9  *   Portals is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Portals is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Portals; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LNET
  25 #include "../../include/linux/libcfs/libcfs.h"
  26 #include "../../include/linux/lnet/lib-lnet.h"
  27
  28 #if  defined(LNET_ROUTER)
  29
  30 /* This is really lnet_proc.c. You might need to update sanity test 215
  31  * if any file format is changed. */
  32
  33 static struct ctl_table_header *lnet_table_header;
  34
  35 #define CTL_LNET         (0x100)
  36 enum {
  37         PSDEV_LNET_STATS = 100,
  38         PSDEV_LNET_ROUTES,
  39         PSDEV_LNET_ROUTERS,
  40         PSDEV_LNET_PEERS,
  41         PSDEV_LNET_BUFFERS,
  42         PSDEV_LNET_NIS,
  43         PSDEV_LNET_PTL_ROTOR,
  44 };
  45
  46 #define LNET_LOFFT_BITS         (sizeof(loff_t) * 8)
  47 /*
  48  * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
  49  */
  50 #define LNET_PROC_CPT_BITS      (LNET_CPT_BITS + 1)
  51 /* change version, 16 bits or 8 bits */
  52 #define LNET_PROC_VER_BITS      max_t(size_t, min_t(size_t, LNET_LOFFT_BITS, 64) / 4, 8)
  53
  54 #define LNET_PROC_HASH_BITS     LNET_PEER_HASH_BITS
  55 /*
  56  * bits for peer hash offset
  57  * NB: we don't use the highest bit of *ppos because it's signed
  58  */
  59 #define LNET_PROC_HOFF_BITS     (LNET_LOFFT_BITS -       \
  60                                  LNET_PROC_CPT_BITS -    \
  61                                  LNET_PROC_VER_BITS -    \
  62                                  LNET_PROC_HASH_BITS - 1)
  63 /* bits for hash index + position */
  64 #define LNET_PROC_HPOS_BITS     (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
  65 /* bits for peer hash table + hash version */
  66 #define LNET_PROC_VPOS_BITS     (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
  67
  68 #define LNET_PROC_CPT_MASK      ((1ULL << LNET_PROC_CPT_BITS) - 1)
  69 #define LNET_PROC_VER_MASK      ((1ULL << LNET_PROC_VER_BITS) - 1)
  70 #define LNET_PROC_HASH_MASK     ((1ULL << LNET_PROC_HASH_BITS) - 1)
  71 #define LNET_PROC_HOFF_MASK     ((1ULL << LNET_PROC_HOFF_BITS) - 1)
  72
  73 #define LNET_PROC_CPT_GET(pos)                          \
  74         (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
  75
  76 #define LNET_PROC_VER_GET(pos)                          \
  77         (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
  78
  79 #define LNET_PROC_HASH_GET(pos)                         \
  80         (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
  81
  82 #define LNET_PROC_HOFF_GET(pos)                         \
  83         (int)((pos) & LNET_PROC_HOFF_MASK)
  84
  85 #define LNET_PROC_POS_MAKE(cpt, ver, hash, off)         \
  86         (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) |   \
  87         ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) |   \
  88         ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
  89         ((off) & LNET_PROC_HOFF_MASK))
  90
  91 #define LNET_PROC_VERSION(v)    ((unsigned int)((v) & LNET_PROC_VER_MASK))
  92
  93 static int proc_call_handler(void *data, int write, loff_t *ppos,
  94                 void __user *buffer, size_t *lenp,
  95                 int (*handler)(void *data, int write,
  96                 loff_t pos, void __user *buffer, int len))
  97 {
  98         int rc = handler(data, write, *ppos, buffer, *lenp);
  99
 100         if (rc < 0)
 101                 return rc;
 102
 103         if (write) {
 104                 *ppos += *lenp;
 105         } else {
 106                 *lenp = rc;
 107                 *ppos += rc;
 108         }
 109         return 0;
 110 }
 111
 112 static int __proc_lnet_stats(void *data, int write,
 113                              loff_t pos, void __user *buffer, int nob)
 114 {
 115         int           rc;
 116         lnet_counters_t *ctrs;
 117         int           len;
 118         char        *tmpstr;
 119         const int       tmpsiz = 256; /* 7 %u and 4 %llu */
 120
 121         if (write) {
 122                 lnet_counters_reset();
 123                 return 0;
 124         }
 125
 126         /* read */
 127
 128         LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
 129         if (ctrs == NULL)
 130                 return -ENOMEM;
 131
 132         LIBCFS_ALLOC(tmpstr, tmpsiz);
 133         if (tmpstr == NULL) {
 134                 LIBCFS_FREE(ctrs, sizeof(*ctrs));
 135                 return -ENOMEM;
 136         }
 137
 138         lnet_counters_get(ctrs);
 139
 140         len = snprintf(tmpstr, tmpsiz,
 141                        "%u %u %u %u %u %u %u %llu %llu %llu %llu",
 142                        ctrs->msgs_alloc, ctrs->msgs_max,
 143                        ctrs->errors,
 144                        ctrs->send_count, ctrs->recv_count,
 145                        ctrs->route_count, ctrs->drop_count,
 146                        ctrs->send_length, ctrs->recv_length,
 147                        ctrs->route_length, ctrs->drop_length);
 148
 149         if (pos >= min_t(int, len, strlen(tmpstr)))
 150                 rc = 0;
 151         else
 152                 rc = cfs_trace_copyout_string(buffer, nob,
 153                                               tmpstr + pos, "\n");
 154
 155         LIBCFS_FREE(tmpstr, tmpsiz);
 156         LIBCFS_FREE(ctrs, sizeof(*ctrs));
 157         return rc;
 158 }
 159
 160 static int proc_lnet_stats(struct ctl_table *table, int write,
 161                            void __user *buffer, size_t *lenp, loff_t *ppos)
 162 {
 163         return proc_call_handler(table->data, write, ppos, buffer, lenp,
 164                                  __proc_lnet_stats);
 165 }
 166
 167 static int proc_lnet_routes(struct ctl_table *table, int write,
 168                             void __user *buffer, size_t *lenp, loff_t *ppos)
 169 {
 170         const int       tmpsiz = 256;
 171         char            *tmpstr;
 172         char            *s;
 173         int             rc = 0;
 174         int             len;
 175         int             ver;
 176         int             off;
 177
 178         CLASSERT(sizeof(loff_t) >= 4);
 179
 180         off = LNET_PROC_HOFF_GET(*ppos);
 181         ver = LNET_PROC_VER_GET(*ppos);
 182
 183         LASSERT(!write);
 184
 185         if (*lenp == 0)
 186                 return 0;
 187
 188         LIBCFS_ALLOC(tmpstr, tmpsiz);
 189         if (tmpstr == NULL)
 190                 return -ENOMEM;
 191
 192         s = tmpstr; /* points to current position in tmpstr[] */
 193
 194         if (*ppos == 0) {
 195                 s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
 196                               the_lnet.ln_routing ? "enabled" : "disabled");
 197                 LASSERT(tmpstr + tmpsiz - s > 0);
 198
 199                 s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
 200                               "net", "hops", "priority", "state", "router");
 201                 LASSERT(tmpstr + tmpsiz - s > 0);
 202
 203                 lnet_net_lock(0);
 204                 ver = (unsigned int)the_lnet.ln_remote_nets_version;
 205                 lnet_net_unlock(0);
 206                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 207         } else {
 208                 struct list_head                *n;
 209                 struct list_head                *r;
 210                 lnet_route_t            *route = NULL;
 211                 lnet_remotenet_t        *rnet  = NULL;
 212                 int                     skip  = off - 1;
 213                 struct list_head                *rn_list;
 214                 int                     i;
 215
 216                 lnet_net_lock(0);
 217
 218                 if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
 219                         lnet_net_unlock(0);
 220                         LIBCFS_FREE(tmpstr, tmpsiz);
 221                         return -ESTALE;
 222                 }
 223
 224                 for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
 225                      i++) {
 226                         rn_list = &the_lnet.ln_remote_nets_hash[i];
 227
 228                         n = rn_list->next;
 229
 230                         while (n != rn_list && route == NULL) {
 231                                 rnet = list_entry(n, lnet_remotenet_t,
 232                                                       lrn_list);
 233
 234                                 r = rnet->lrn_routes.next;
 235
 236                                 while (r != &rnet->lrn_routes) {
 237                                         lnet_route_t *re =
 238                                                 list_entry(r, lnet_route_t,
 239                                                                lr_list);
 240                                         if (skip == 0) {
 241                                                 route = re;
 242                                                 break;
 243                                         }
 244
 245                                         skip--;
 246                                         r = r->next;
 247                                 }
 248
 249                                 n = n->next;
 250                         }
 251                 }
 252
 253                 if (route != NULL) {
 254                         __u32        net        = rnet->lrn_net;
 255                         unsigned int hops       = route->lr_hops;
 256                         unsigned int priority   = route->lr_priority;
 257                         lnet_nid_t   nid        = route->lr_gateway->lp_nid;
 258                         int          alive      = route->lr_gateway->lp_alive;
 259
 260                         s += snprintf(s, tmpstr + tmpsiz - s,
 261                                       "%-8s %4u %8u %7s %s\n",
 262                                       libcfs_net2str(net), hops,
 263                                       priority,
 264                                       alive ? "up" : "down",
 265                                       libcfs_nid2str(nid));
 266                         LASSERT(tmpstr + tmpsiz - s > 0);
 267                 }
 268
 269                 lnet_net_unlock(0);
 270         }
 271
 272         len = s - tmpstr;     /* how many bytes was written */
 273
 274         if (len > *lenp) {    /* linux-supplied buffer is too small */
 275                 rc = -EINVAL;
 276         } else if (len > 0) { /* wrote something */
 277                 if (copy_to_user(buffer, tmpstr, len))
 278                         rc = -EFAULT;
 279                 else {
 280                         off += 1;
 281                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 282                 }
 283         }
 284
 285         LIBCFS_FREE(tmpstr, tmpsiz);
 286
 287         if (rc == 0)
 288                 *lenp = len;
 289
 290         return rc;
 291 }
 292
 293 static int proc_lnet_routers(struct ctl_table *table, int write,
 294                              void __user *buffer, size_t *lenp, loff_t *ppos)
 295 {
 296         int     rc = 0;
 297         char      *tmpstr;
 298         char      *s;
 299         const int  tmpsiz = 256;
 300         int     len;
 301         int     ver;
 302         int     off;
 303
 304         off = LNET_PROC_HOFF_GET(*ppos);
 305         ver = LNET_PROC_VER_GET(*ppos);
 306
 307         LASSERT(!write);
 308
 309         if (*lenp == 0)
 310                 return 0;
 311
 312         LIBCFS_ALLOC(tmpstr, tmpsiz);
 313         if (tmpstr == NULL)
 314                 return -ENOMEM;
 315
 316         s = tmpstr; /* points to current position in tmpstr[] */
 317
 318         if (*ppos == 0) {
 319                 s += snprintf(s, tmpstr + tmpsiz - s,
 320                               "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
 321                               "ref", "rtr_ref", "alive_cnt", "state",
 322                               "last_ping", "ping_sent", "deadline",
 323                               "down_ni", "router");
 324                 LASSERT(tmpstr + tmpsiz - s > 0);
 325
 326                 lnet_net_lock(0);
 327                 ver = (unsigned int)the_lnet.ln_routers_version;
 328                 lnet_net_unlock(0);
 329                 *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 330         } else {
 331                 struct list_head                *r;
 332                 struct lnet_peer        *peer = NULL;
 333                 int                     skip = off - 1;
 334
 335                 lnet_net_lock(0);
 336
 337                 if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
 338                         lnet_net_unlock(0);
 339
 340                         LIBCFS_FREE(tmpstr, tmpsiz);
 341                         return -ESTALE;
 342                 }
 343
 344                 r = the_lnet.ln_routers.next;
 345
 346                 while (r != &the_lnet.ln_routers) {
 347                         lnet_peer_t *lp = list_entry(r, lnet_peer_t,
 348                                                          lp_rtr_list);
 349
 350                         if (skip == 0) {
 351                                 peer = lp;
 352                                 break;
 353                         }
 354
 355                         skip--;
 356                         r = r->next;
 357                 }
 358
 359                 if (peer != NULL) {
 360                         lnet_nid_t nid = peer->lp_nid;
 361                         unsigned long now = cfs_time_current();
 362                         unsigned long deadline = peer->lp_ping_deadline;
 363                         int nrefs     = peer->lp_refcount;
 364                         int nrtrrefs  = peer->lp_rtr_refcount;
 365                         int alive_cnt = peer->lp_alive_count;
 366                         int alive     = peer->lp_alive;
 367                         int pingsent  = !peer->lp_ping_notsent;
 368                         int last_ping = cfs_duration_sec(cfs_time_sub(now,
 369                                                      peer->lp_ping_timestamp));
 370                         int down_ni   = 0;
 371                         lnet_route_t *rtr;
 372
 373                         if ((peer->lp_ping_feats &
 374                              LNET_PING_FEAT_NI_STATUS) != 0) {
 375                                 list_for_each_entry(rtr, &peer->lp_routes,
 376                                                         lr_gwlist) {
 377                                         /* downis on any route should be the
 378                                          * number of downis on the gateway */
 379                                         if (rtr->lr_downis != 0) {
 380                                                 down_ni = rtr->lr_downis;
 381                                                 break;
 382                                         }
 383                                 }
 384                         }
 385
 386                         if (deadline == 0)
 387                                 s += snprintf(s, tmpstr + tmpsiz - s,
 388                                               "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
 389                                               nrefs, nrtrrefs, alive_cnt,
 390                                               alive ? "up" : "down", last_ping,
 391                                               pingsent, "NA", down_ni,
 392                                               libcfs_nid2str(nid));
 393                         else
 394                                 s += snprintf(s, tmpstr + tmpsiz - s,
 395                                               "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
 396                                               nrefs, nrtrrefs, alive_cnt,
 397                                               alive ? "up" : "down", last_ping,
 398                                               pingsent,
 399                                               cfs_duration_sec(cfs_time_sub(deadline, now)),
 400                                               down_ni, libcfs_nid2str(nid));
 401                         LASSERT(tmpstr + tmpsiz - s > 0);
 402                 }
 403
 404                 lnet_net_unlock(0);
 405         }
 406
 407         len = s - tmpstr;     /* how many bytes was written */
 408
 409         if (len > *lenp) {    /* linux-supplied buffer is too small */
 410                 rc = -EINVAL;
 411         } else if (len > 0) { /* wrote something */
 412                 if (copy_to_user(buffer, tmpstr, len))
 413                         rc = -EFAULT;
 414                 else {
 415                         off += 1;
 416                         *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
 417                 }
 418         }
 419
 420         LIBCFS_FREE(tmpstr, tmpsiz);
 421
 422         if (rc == 0)
 423                 *lenp = len;
 424
 425         return rc;
 426 }
 427
 428 static int proc_lnet_peers(struct ctl_table *table, int write,
 429                            void __user *buffer, size_t *lenp, loff_t *ppos)
 430 {
 431         const int               tmpsiz  = 256;
 432         struct lnet_peer_table  *ptable;
 433         char                    *tmpstr;
 434         char                    *s;
 435         int                     cpt  = LNET_PROC_CPT_GET(*ppos);
 436         int                     ver  = LNET_PROC_VER_GET(*ppos);
 437         int                     hash = LNET_PROC_HASH_GET(*ppos);
 438         int                     hoff = LNET_PROC_HOFF_GET(*ppos);
 439         int                     rc = 0;
 440         int                     len;
 441
 442         CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
 443         LASSERT(!write);
 444
 445         if (*lenp == 0)
 446                 return 0;
 447
 448         if (cpt >= LNET_CPT_NUMBER) {
 449                 *lenp = 0;
 450                 return 0;
 451         }
 452
 453         LIBCFS_ALLOC(tmpstr, tmpsiz);
 454         if (tmpstr == NULL)
 455                 return -ENOMEM;
 456
 457         s = tmpstr; /* points to current position in tmpstr[] */
 458
 459         if (*ppos == 0) {
 460                 s += snprintf(s, tmpstr + tmpsiz - s,
 461                               "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
 462                               "nid", "refs", "state", "last", "max",
 463                               "rtr", "min", "tx", "min", "queue");
 464                 LASSERT(tmpstr + tmpsiz - s > 0);
 465
 466                 hoff++;
 467         } else {
 468                 struct lnet_peer        *peer;
 469                 struct list_head                *p;
 470                 int                     skip;
 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                                 lnet_peer_t *lp = list_entry(p, lnet_peer_t,
 493                                                                  lp_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 lp_hashlist */
 500                                         if (lp->lp_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->lp_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->lp_nid;
 525                         int     nrefs     = peer->lp_refcount;
 526                         int     lastalive = -1;
 527                         char      *aliveness = "NA";
 528                         int     maxcr     = peer->lp_ni->ni_peertxcredits;
 529                         int     txcr      = peer->lp_txcredits;
 530                         int     mintxcr   = peer->lp_mintxcredits;
 531                         int     rtrcr     = peer->lp_rtrcredits;
 532                         int     minrtrcr  = peer->lp_minrtrcredits;
 533                         int     txqnob    = peer->lp_txqnob;
 534
 535                         if (lnet_isrouter(peer) ||
 536                             lnet_peer_aliveness_enabled(peer))
 537                                 aliveness = peer->lp_alive ? "up" : "down";
 538
 539                         if (lnet_peer_aliveness_enabled(peer)) {
 540                                 unsigned long     now = cfs_time_current();
 541                                 long delta;
 542
 543                                 delta = cfs_time_sub(now, peer->lp_last_alive);
 544                                 lastalive = cfs_duration_sec(delta);
 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 %5d %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                 lnet_rtrbufpool_t *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 proc_lnet_buffers(struct ctl_table *table, int write,
 654                              void __user *buffer, size_t *lenp, loff_t *ppos)
 655 {
 656         return proc_call_handler(table->data, write, ppos, buffer, lenp,
 657                                  __proc_lnet_buffers);
 658 }
 659
 660 static int proc_lnet_nis(struct ctl_table *table, int write,
 661                          void __user *buffer, size_t *lenp, loff_t *ppos)
 662 {
 663         int     tmpsiz = 128 * LNET_CPT_NUMBER;
 664         int     rc = 0;
 665         char      *tmpstr;
 666         char      *s;
 667         int     len;
 668
 669         LASSERT(!write);
 670
 671         if (*lenp == 0)
 672                 return 0;
 673
 674         LIBCFS_ALLOC(tmpstr, tmpsiz);
 675         if (tmpstr == NULL)
 676                 return -ENOMEM;
 677
 678         s = tmpstr; /* points to current position in tmpstr[] */
 679
 680         if (*ppos == 0) {
 681                 s += snprintf(s, tmpstr + tmpsiz - s,
 682                               "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
 683                               "nid", "status", "alive", "refs", "peer",
 684                               "rtr", "max", "tx", "min");
 685                 LASSERT(tmpstr + tmpsiz - s > 0);
 686         } else {
 687                 struct list_head        *n;
 688                 lnet_ni_t        *ni   = NULL;
 689                 int             skip = *ppos - 1;
 690
 691                 lnet_net_lock(0);
 692
 693                 n = the_lnet.ln_nis.next;
 694
 695                 while (n != &the_lnet.ln_nis) {
 696                         lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
 697
 698                         if (skip == 0) {
 699                                 ni = a_ni;
 700                                 break;
 701                         }
 702
 703                         skip--;
 704                         n = n->next;
 705                 }
 706
 707                 if (ni != NULL) {
 708                         struct lnet_tx_queue    *tq;
 709                         char    *stat;
 710                         long    now = get_seconds();
 711                         int     last_alive = -1;
 712                         int     i;
 713                         int     j;
 714
 715                         if (the_lnet.ln_routing)
 716                                 last_alive = now - ni->ni_last_alive;
 717
 718                         /* @lo forever alive */
 719                         if (ni->ni_lnd->lnd_type == LOLND)
 720                                 last_alive = 0;
 721
 722                         lnet_ni_lock(ni);
 723                         LASSERT(ni->ni_status != NULL);
 724                         stat = (ni->ni_status->ns_status ==
 725                                 LNET_NI_STATUS_UP) ? "up" : "down";
 726                         lnet_ni_unlock(ni);
 727
 728                         /* we actually output credits information for
 729                          * TX queue of each partition */
 730                         cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
 731                                 for (j = 0; ni->ni_cpts != NULL &&
 732                                      j < ni->ni_ncpts; j++) {
 733                                         if (i == ni->ni_cpts[j])
 734                                                 break;
 735                                 }
 736
 737                                 if (j == ni->ni_ncpts)
 738                                         continue;
 739
 740                                 if (i != 0)
 741                                         lnet_net_lock(i);
 742
 743                                 s += snprintf(s, tmpstr + tmpsiz - s,
 744                                       "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
 745                                       libcfs_nid2str(ni->ni_nid), stat,
 746                                       last_alive, *ni->ni_refs[i],
 747                                       ni->ni_peertxcredits,
 748                                       ni->ni_peerrtrcredits,
 749                                       tq->tq_credits_max,
 750                                       tq->tq_credits, tq->tq_credits_min);
 751                                 if (i != 0)
 752                                         lnet_net_unlock(i);
 753                         }
 754                         LASSERT(tmpstr + tmpsiz - s > 0);
 755                 }
 756
 757                 lnet_net_unlock(0);
 758         }
 759
 760         len = s - tmpstr;     /* how many bytes was written */
 761
 762         if (len > *lenp) {    /* linux-supplied buffer is too small */
 763                 rc = -EINVAL;
 764         } else if (len > 0) { /* wrote something */
 765                 if (copy_to_user(buffer, tmpstr, len))
 766                         rc = -EFAULT;
 767                 else
 768                         *ppos += 1;
 769         }
 770
 771         LIBCFS_FREE(tmpstr, tmpsiz);
 772
 773         if (rc == 0)
 774                 *lenp = len;
 775
 776         return rc;
 777 }
 778
 779 struct lnet_portal_rotors {
 780         int          pr_value;
 781         const char      *pr_name;
 782         const char      *pr_desc;
 783 };
 784
 785 static struct lnet_portal_rotors        portal_rotors[] = {
 786         {
 787                 .pr_value = LNET_PTL_ROTOR_OFF,
 788                 .pr_name  = "OFF",
 789                 .pr_desc  = "Turn off message rotor for wildcard portals"
 790         },
 791         {
 792                 .pr_value = LNET_PTL_ROTOR_ON,
 793                 .pr_name  = "ON",
 794                 .pr_desc  = "round-robin dispatch all PUT messages for wildcard portals"
 795         },
 796         {
 797                 .pr_value = LNET_PTL_ROTOR_RR_RT,
 798                 .pr_name  = "RR_RT",
 799                 .pr_desc  = "round-robin dispatch routed PUT message for wildcard portals"
 800         },
 801         {
 802                 .pr_value = LNET_PTL_ROTOR_HASH_RT,
 803                 .pr_name  = "HASH_RT",
 804                 .pr_desc  = "dispatch routed PUT message by hashing source NID for wildcard portals"
 805         },
 806         {
 807                 .pr_value = -1,
 808                 .pr_name  = NULL,
 809                 .pr_desc  = NULL
 810         },
 811 };
 812
 813 extern int portal_rotor;
 814
 815 static int __proc_lnet_portal_rotor(void *data, int write,
 816                                     loff_t pos, void __user *buffer, int nob)
 817 {
 818         const int       buf_len = 128;
 819         char            *buf;
 820         char            *tmp;
 821         int             rc;
 822         int             i;
 823
 824         LIBCFS_ALLOC(buf, buf_len);
 825         if (buf == NULL)
 826                 return -ENOMEM;
 827
 828         if (!write) {
 829                 lnet_res_lock(0);
 830
 831                 for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
 832                         if (portal_rotors[i].pr_value == portal_rotor)
 833                                 break;
 834                 }
 835
 836                 LASSERT(portal_rotors[i].pr_value == portal_rotor);
 837                 lnet_res_unlock(0);
 838
 839                 rc = snprintf(buf, buf_len,
 840                               "{\n\tportals: all\n"
 841                               "\trotor: %s\n\tdescription: %s\n}",
 842                               portal_rotors[i].pr_name,
 843                               portal_rotors[i].pr_desc);
 844
 845                 if (pos >= min_t(int, rc, buf_len)) {
 846                         rc = 0;
 847                 } else {
 848                         rc = cfs_trace_copyout_string(buffer, nob,
 849                                         buf + pos, "\n");
 850                 }
 851                 goto out;
 852         }
 853
 854         rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
 855         if (rc < 0)
 856                 goto out;
 857
 858         tmp = cfs_trimwhite(buf);
 859
 860         rc = -EINVAL;
 861         lnet_res_lock(0);
 862         for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
 863                 if (strncasecmp(portal_rotors[i].pr_name, tmp,
 864                                 strlen(portal_rotors[i].pr_name)) == 0) {
 865                         portal_rotor = portal_rotors[i].pr_value;
 866                         rc = 0;
 867                         break;
 868                 }
 869         }
 870         lnet_res_unlock(0);
 871 out:
 872         LIBCFS_FREE(buf, buf_len);
 873         return rc;
 874 }
 875
 876 static int proc_lnet_portal_rotor(struct ctl_table *table, int write,
 877                                   void __user *buffer, size_t *lenp,
 878                                   loff_t *ppos)
 879 {
 880         return proc_call_handler(table->data, write, ppos, buffer, lenp,
 881                                  __proc_lnet_portal_rotor);
 882 }
 883
 884 static struct ctl_table lnet_table[] = {
 885         /*
 886          * NB No .strategy entries have been provided since sysctl(8) prefers
 887          * to go via /proc for portability.
 888          */
 889         {
 890                 .procname = "stats",
 891                 .mode     = 0644,
 892                 .proc_handler = &proc_lnet_stats,
 893         },
 894         {
 895                 .procname = "routes",
 896                 .mode     = 0444,
 897                 .proc_handler = &proc_lnet_routes,
 898         },
 899         {
 900                 .procname = "routers",
 901                 .mode     = 0444,
 902                 .proc_handler = &proc_lnet_routers,
 903         },
 904         {
 905                 .procname = "peers",
 906                 .mode     = 0444,
 907                 .proc_handler = &proc_lnet_peers,
 908         },
 909         {
 910                 .procname = "buffers",
 911                 .mode     = 0444,
 912                 .proc_handler = &proc_lnet_buffers,
 913         },
 914         {
 915                 .procname = "nis",
 916                 .mode     = 0444,
 917                 .proc_handler = &proc_lnet_nis,
 918         },
 919         {
 920                 .procname = "portal_rotor",
 921                 .mode     = 0644,
 922                 .proc_handler = &proc_lnet_portal_rotor,
 923         },
 924         {
 925         }
 926 };
 927
 928 static struct ctl_table top_table[] = {
 929         {
 930                 .procname = "lnet",
 931                 .mode     = 0555,
 932                 .data     = NULL,
 933                 .maxlen   = 0,
 934                 .child    = lnet_table,
 935         },
 936         {
 937         }
 938 };
 939
 940 void
 941 lnet_proc_init(void)
 942 {
 943         if (lnet_table_header == NULL)
 944                 lnet_table_header = register_sysctl_table(top_table);
 945 }
 946
 947 void
 948 lnet_proc_fini(void)
 949 {
 950         if (lnet_table_header != NULL)
 951                 unregister_sysctl_table(lnet_table_header);
 952
 953         lnet_table_header = NULL;
 954 }
 955
 956 #else
 957
 958 void
 959 lnet_proc_init(void)
 960 {
 961 }
 962
 963 void
 964 lnet_proc_fini(void)
 965 {
 966 }
 967
 968 #endif