lnet/lnet/config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  */
  34
  35 #define DEBUG_SUBSYSTEM S_LNET
  36 #include <lnet/lib-lnet.h>
  37
  38 typedef struct {                            /* tmp struct for parsing routes */
  39         cfs_list_t         ltb_list;        /* stash on lists */
  40         int                ltb_size;        /* allocated size */
  41         char               ltb_text[0];     /* text buffer */
  42 } lnet_text_buf_t;
  43
  44 static int lnet_tbnob = 0;                      /* track text buf allocation */
  45 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  46 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  47
  48 void
  49 lnet_syntax(char *name, char *str, int offset, int width)
  50 {
  51         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  52         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  53
  54         memset(dots, '.', sizeof(dots));
  55         dots[sizeof(dots)-1] = 0;
  56         memset(dashes, '-', sizeof(dashes));
  57         dashes[sizeof(dashes)-1] = 0;
  58
  59         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  60         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  61                            (int)strlen(name), dots, offset, dots,
  62                             (width < 1) ? 0 : width - 1, dashes);
  63 }
  64
  65 int
  66 lnet_issep (char c)
  67 {
  68         switch (c) {
  69         case '\n':
  70         case '\r':
  71         case ';':
  72                 return 1;
  73         default:
  74                 return 0;
  75         }
  76 }
  77
  78 int
  79 lnet_net_unique(__u32 net, cfs_list_t *nilist)
  80 {
  81         cfs_list_t       *tmp;
  82         lnet_ni_t        *ni;
  83
  84         cfs_list_for_each (tmp, nilist) {
  85                 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
  86
  87                 if (LNET_NIDNET(ni->ni_nid) == net)
  88                         return 0;
  89         }
  90
  91         return 1;
  92 }
  93
  94 void
  95 lnet_ni_free(struct lnet_ni *ni)
  96 {
  97         if (ni->ni_refs != NULL)
  98                 cfs_percpt_free(ni->ni_refs);
  99
 100         if (ni->ni_tx_queues != NULL)
 101                 cfs_percpt_free(ni->ni_tx_queues);
 102
 103         if (ni->ni_cpts != NULL)
 104                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 105
 106 #ifndef __KERNEL__
 107 # ifdef HAVE_LIBPTHREAD
 108         pthread_mutex_destroy(&ni->ni_lock);
 109 # endif
 110 #endif
 111         LIBCFS_FREE(ni, sizeof(*ni));
 112 }
 113
 114 lnet_ni_t *
 115 lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, cfs_list_t *nilist)
 116 {
 117         struct lnet_tx_queue    *tq;
 118         struct lnet_ni          *ni;
 119         int                     rc;
 120         int                     i;
 121
 122         if (!lnet_net_unique(net, nilist)) {
 123                 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
 124                                    libcfs_net2str(net));
 125                 return NULL;
 126         }
 127
 128         LIBCFS_ALLOC(ni, sizeof(*ni));
 129         if (ni == NULL) {
 130                 CERROR("Out of memory creating network %s\n",
 131                        libcfs_net2str(net));
 132                 return NULL;
 133         }
 134
 135 #ifdef __KERNEL__
 136         cfs_spin_lock_init(&ni->ni_lock);
 137 #else
 138 # ifdef HAVE_LIBPTHREAD
 139         pthread_mutex_init(&ni->ni_lock, NULL);
 140 # endif
 141 #endif
 142         CFS_INIT_LIST_HEAD(&ni->ni_cptlist);
 143         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 144                                        sizeof(*ni->ni_refs[0]));
 145         if (ni->ni_refs == NULL)
 146                 goto failed;
 147
 148         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 149                                             sizeof(*ni->ni_tx_queues[0]));
 150         if (ni->ni_tx_queues == NULL)
 151                 goto failed;
 152
 153         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 154                 CFS_INIT_LIST_HEAD(&tq->tq_delayed);
 155
 156         if (el == NULL) {
 157                 ni->ni_cpts  = NULL;
 158                 ni->ni_ncpts = LNET_CPT_NUMBER;
 159         } else {
 160                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 161                 if (rc <= 0) {
 162                         CERROR("Failed to set CPTs for NI %s: %d\n",
 163                                libcfs_net2str(net), rc);
 164                         goto failed;
 165                 }
 166
 167                 LASSERT(rc <= LNET_CPT_NUMBER);
 168                 if (rc == LNET_CPT_NUMBER) {
 169                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 170                         ni->ni_cpts = NULL;
 171                 }
 172
 173                 ni->ni_ncpts = rc;
 174         }
 175
 176         /* LND will fill in the address part of the NID */
 177         ni->ni_nid = LNET_MKNID(net, 0);
 178         ni->ni_last_alive = cfs_time_current_sec();
 179         cfs_list_add_tail(&ni->ni_list, nilist);
 180         return ni;
 181  failed:
 182         lnet_ni_free(ni);
 183         return NULL;
 184 }
 185
 186 int
 187 lnet_parse_networks(cfs_list_t *nilist, char *networks)
 188 {
 189         struct cfs_expr_list *el = NULL;
 190         int             tokensize = strlen(networks) + 1;
 191         char            *tokens;
 192         char            *str;
 193         char            *tmp;
 194         struct lnet_ni  *ni;
 195         __u32           net;
 196         int             nnets = 0;
 197
 198         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 199                 /* _WAY_ conservative */
 200                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 201                                    "long\n");
 202                 return -EINVAL;
 203         }
 204
 205         LIBCFS_ALLOC(tokens, tokensize);
 206         if (tokens == NULL) {
 207                 CERROR("Can't allocate net tokens\n");
 208                 return -ENOMEM;
 209         }
 210
 211         the_lnet.ln_network_tokens = tokens;
 212         the_lnet.ln_network_tokens_nob = tokensize;
 213         memcpy (tokens, networks, tokensize);
 214         str = tmp = tokens;
 215
 216         /* Add in the loopback network */
 217         ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist);
 218         if (ni == NULL)
 219                 goto failed;
 220
 221         while (str != NULL && *str != 0) {
 222                 char    *comma = strchr(str, ',');
 223                 char    *bracket = strchr(str, '(');
 224                 char    *square = strchr(str, '[');
 225                 char    *iface;
 226                 int     niface;
 227                 int     rc;
 228
 229                 /* NB we don't check interface conflicts here; it's the LNDs
 230                  * responsibility (if it cares at all) */
 231
 232                 if (square != NULL && (comma == NULL || square < comma)) {
 233                         /* i.e: o2ib0(ib0)[1,2], number between square
 234                          * brackets are CPTs this NI needs to be bond */
 235                         if (bracket != NULL && bracket > square) {
 236                                 tmp = square;
 237                                 goto failed_syntax;
 238                         }
 239
 240                         tmp = strchr(square, ']');
 241                         if (tmp == NULL) {
 242                                 tmp = square;
 243                                 goto failed_syntax;
 244                         }
 245
 246                         rc = cfs_expr_list_parse(square, tmp - square + 1,
 247                                                  0, LNET_CPT_NUMBER - 1, &el);
 248                         if (rc != 0) {
 249                                 tmp = square;
 250                                 goto failed_syntax;
 251                         }
 252
 253                         while (square <= tmp)
 254                                 *square++ = ' ';
 255                 }
 256
 257                 if (bracket == NULL ||
 258                     (comma != NULL && comma < bracket)) {
 259
 260                         /* no interface list specified */
 261
 262                         if (comma != NULL)
 263                                 *comma++ = 0;
 264                         net = libcfs_str2net(cfs_trimwhite(str));
 265
 266                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 267                                 LCONSOLE_ERROR_MSG(0x113, "Unrecognised network"
 268                                                    " type\n");
 269                                 tmp = str;
 270                                 goto failed_syntax;
 271                         }
 272
 273                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 274                             lnet_ni_alloc(net, el, nilist) == NULL)
 275                                 goto failed;
 276
 277                         if (el != NULL) {
 278                                 cfs_expr_list_free(el);
 279                                 el = NULL;
 280                         }
 281
 282                         str = comma;
 283                         continue;
 284                 }
 285
 286                 *bracket = 0;
 287                 net = libcfs_str2net(cfs_trimwhite(str));
 288                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 289                         tmp = str;
 290                         goto failed_syntax;
 291                 }
 292
 293                 nnets++;
 294                 ni = lnet_ni_alloc(net, el, nilist);
 295                 if (ni == NULL)
 296                         goto failed;
 297
 298                 if (el != NULL) {
 299                         cfs_expr_list_free(el);
 300                         el = NULL;
 301                 }
 302
 303                 niface = 0;
 304                 iface = bracket + 1;
 305
 306                 bracket = strchr(iface, ')');
 307                 if (bracket == NULL) {
 308                         tmp = iface;
 309                         goto failed_syntax;
 310                 }
 311
 312                 *bracket = 0;
 313                 do {
 314                         comma = strchr(iface, ',');
 315                         if (comma != NULL)
 316                                 *comma++ = 0;
 317
 318                         iface = cfs_trimwhite(iface);
 319                         if (*iface == 0) {
 320                                 tmp = iface;
 321                                 goto failed_syntax;
 322                         }
 323
 324                         if (niface == LNET_MAX_INTERFACES) {
 325                                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 326                                                    "for net %s\n",
 327                                                    libcfs_net2str(net));
 328                                 goto failed;
 329                         }
 330
 331                         ni->ni_interfaces[niface++] = iface;
 332                         iface = comma;
 333                 } while (iface != NULL);
 334
 335                 str = bracket + 1;
 336                 comma = strchr(bracket + 1, ',');
 337                 if (comma != NULL) {
 338                         *comma = 0;
 339                         str = cfs_trimwhite(str);
 340                         if (*str != 0) {
 341                                 tmp = str;
 342                                 goto failed_syntax;
 343                         }
 344                         str = comma + 1;
 345                         continue;
 346                 }
 347
 348                 str = cfs_trimwhite(str);
 349                 if (*str != 0) {
 350                         tmp = str;
 351                         goto failed_syntax;
 352                 }
 353         }
 354
 355         LASSERT(!cfs_list_empty(nilist));
 356         return 0;
 357
 358  failed_syntax:
 359         lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
 360  failed:
 361         while (!cfs_list_empty(nilist)) {
 362                 ni = cfs_list_entry(nilist->next, lnet_ni_t, ni_list);
 363
 364                 cfs_list_del(&ni->ni_list);
 365                 lnet_ni_free(ni);
 366         }
 367
 368         if (el != NULL)
 369                 cfs_expr_list_free(el);
 370
 371         LIBCFS_FREE(tokens, tokensize);
 372         the_lnet.ln_network_tokens = NULL;
 373
 374         return -EINVAL;
 375 }
 376
 377 lnet_text_buf_t *
 378 lnet_new_text_buf (int str_len)
 379 {
 380         lnet_text_buf_t *ltb;
 381         int              nob;
 382
 383         /* NB allocate space for the terminating 0 */
 384         nob = offsetof(lnet_text_buf_t, ltb_text[str_len + 1]);
 385         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 386                 /* _way_ conservative for "route net gateway..." */
 387                 CERROR("text buffer too big\n");
 388                 return NULL;
 389         }
 390
 391         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 392                 CERROR("Too many text buffers\n");
 393                 return NULL;
 394         }
 395
 396         LIBCFS_ALLOC(ltb, nob);
 397         if (ltb == NULL)
 398                 return NULL;
 399
 400         ltb->ltb_size = nob;
 401         ltb->ltb_text[0] = 0;
 402         lnet_tbnob += nob;
 403         return ltb;
 404 }
 405
 406 void
 407 lnet_free_text_buf (lnet_text_buf_t *ltb)
 408 {
 409         lnet_tbnob -= ltb->ltb_size;
 410         LIBCFS_FREE(ltb, ltb->ltb_size);
 411 }
 412
 413 void
 414 lnet_free_text_bufs(cfs_list_t *tbs)
 415 {
 416         lnet_text_buf_t  *ltb;
 417
 418         while (!cfs_list_empty(tbs)) {
 419                 ltb = cfs_list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 420
 421                 cfs_list_del(&ltb->ltb_list);
 422                 lnet_free_text_buf(ltb);
 423         }
 424 }
 425
 426 void
 427 lnet_print_text_bufs(cfs_list_t *tbs)
 428 {
 429         cfs_list_t        *tmp;
 430         lnet_text_buf_t   *ltb;
 431
 432         cfs_list_for_each (tmp, tbs) {
 433                 ltb = cfs_list_entry(tmp, lnet_text_buf_t, ltb_list);
 434
 435                 CDEBUG(D_WARNING, "%s\n", ltb->ltb_text);
 436         }
 437
 438         CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob);
 439 }
 440
 441 int
 442 lnet_str2tbs_sep (cfs_list_t *tbs, char *str)
 443 {
 444         cfs_list_t        pending;
 445         char             *sep;
 446         int               nob;
 447         int               i;
 448         lnet_text_buf_t  *ltb;
 449
 450         CFS_INIT_LIST_HEAD(&pending);
 451
 452         /* Split 'str' into separate commands */
 453         for (;;) {
 454                 /* skip leading whitespace */
 455                 while (cfs_iswhite(*str))
 456                         str++;
 457
 458                 /* scan for separator or comment */
 459                 for (sep = str; *sep != 0; sep++)
 460                         if (lnet_issep(*sep) || *sep == '#')
 461                                 break;
 462
 463                 nob = (int)(sep - str);
 464                 if (nob > 0) {
 465                         ltb = lnet_new_text_buf(nob);
 466                         if (ltb == NULL) {
 467                                 lnet_free_text_bufs(&pending);
 468                                 return -1;
 469                         }
 470
 471                         for (i = 0; i < nob; i++)
 472                                 if (cfs_iswhite(str[i]))
 473                                         ltb->ltb_text[i] = ' ';
 474                                 else
 475                                         ltb->ltb_text[i] = str[i];
 476
 477                         ltb->ltb_text[nob] = 0;
 478
 479                         cfs_list_add_tail(&ltb->ltb_list, &pending);
 480                 }
 481
 482                 if (*sep == '#') {
 483                         /* scan for separator */
 484                         do {
 485                                 sep++;
 486                         } while (*sep != 0 && !lnet_issep(*sep));
 487                 }
 488
 489                 if (*sep == 0)
 490                         break;
 491
 492                 str = sep + 1;
 493         }
 494
 495         cfs_list_splice(&pending, tbs->prev);
 496         return 0;
 497 }
 498
 499 int
 500 lnet_expand1tb (cfs_list_t *list,
 501                char *str, char *sep1, char *sep2,
 502                char *item, int itemlen)
 503 {
 504         int              len1 = (int)(sep1 - str);
 505         int              len2 = strlen(sep2 + 1);
 506         lnet_text_buf_t *ltb;
 507
 508         LASSERT (*sep1 == '[');
 509         LASSERT (*sep2 == ']');
 510
 511         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 512         if (ltb == NULL)
 513                 return -ENOMEM;
 514
 515         memcpy(ltb->ltb_text, str, len1);
 516         memcpy(&ltb->ltb_text[len1], item, itemlen);
 517         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 518         ltb->ltb_text[len1 + itemlen + len2] = 0;
 519
 520         cfs_list_add_tail(&ltb->ltb_list, list);
 521         return 0;
 522 }
 523
 524 int
 525 lnet_str2tbs_expand (cfs_list_t *tbs, char *str)
 526 {
 527         char              num[16];
 528         cfs_list_t        pending;
 529         char             *sep;
 530         char             *sep2;
 531         char             *parsed;
 532         char             *enditem;
 533         int               lo;
 534         int               hi;
 535         int               stride;
 536         int               i;
 537         int               nob;
 538         int               scanned;
 539
 540         CFS_INIT_LIST_HEAD(&pending);
 541
 542         sep = strchr(str, '[');
 543         if (sep == NULL)                        /* nothing to expand */
 544                 return 0;
 545
 546         sep2 = strchr(sep, ']');
 547         if (sep2 == NULL)
 548                 goto failed;
 549
 550         for (parsed = sep; parsed < sep2; parsed = enditem) {
 551
 552                 enditem = ++parsed;
 553                 while (enditem < sep2 && *enditem != ',')
 554                         enditem++;
 555
 556                 if (enditem == parsed)          /* no empty items */
 557                         goto failed;
 558
 559                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
 560
 561                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 562
 563                                 /* simple string enumeration */
 564                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 565                                                    parsed, (int)(enditem - parsed)) != 0)
 566                                         goto failed;
 567
 568                                 continue;
 569                         }
 570
 571                         stride = 1;
 572                 }
 573
 574                 /* range expansion */
 575
 576                 if (enditem != parsed + scanned) /* no trailing junk */
 577                         goto failed;
 578
 579                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 580                     (hi - lo) % stride != 0)
 581                         goto failed;
 582
 583                 for (i = lo; i <= hi; i += stride) {
 584
 585                         snprintf(num, sizeof(num), "%d", i);
 586                         nob = strlen(num);
 587                         if (nob + 1 == sizeof(num))
 588                                 goto failed;
 589
 590                         if (lnet_expand1tb(&pending, str, sep, sep2,
 591                                            num, nob) != 0)
 592                                 goto failed;
 593                 }
 594         }
 595
 596         cfs_list_splice(&pending, tbs->prev);
 597         return 1;
 598
 599  failed:
 600         lnet_free_text_bufs(&pending);
 601         return -1;
 602 }
 603
 604 int
 605 lnet_parse_hops (char *str, unsigned int *hops)
 606 {
 607         int     len = strlen(str);
 608         int     nob = len;
 609
 610         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 611                 nob == len &&
 612                 *hops > 0 && *hops < 256);
 613 }
 614
 615
 616 int
 617 lnet_parse_route (char *str, int *im_a_router)
 618 {
 619         /* static scratch buffer OK (single threaded) */
 620         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 621
 622         cfs_list_t        nets;
 623         cfs_list_t        gateways;
 624         cfs_list_t       *tmp1;
 625         cfs_list_t       *tmp2;
 626         __u32             net;
 627         lnet_nid_t        nid;
 628         lnet_text_buf_t  *ltb;
 629         int               rc;
 630         char             *sep;
 631         char             *token = str;
 632         int               ntokens = 0;
 633         int               myrc = -1;
 634         unsigned int      hops;
 635         int               got_hops = 0;
 636
 637         CFS_INIT_LIST_HEAD(&gateways);
 638         CFS_INIT_LIST_HEAD(&nets);
 639
 640         /* save a copy of the string for error messages */
 641         strncpy(cmd, str, sizeof(cmd) - 1);
 642         cmd[sizeof(cmd) - 1] = 0;
 643
 644         sep = str;
 645         for (;;) {
 646                 /* scan for token start */
 647                 while (cfs_iswhite(*sep))
 648                         sep++;
 649                 if (*sep == 0) {
 650                         if (ntokens < (got_hops ? 3 : 2))
 651                                 goto token_error;
 652                         break;
 653                 }
 654
 655                 ntokens++;
 656                 token = sep++;
 657
 658                 /* scan for token end */
 659                 while (*sep != 0 && !cfs_iswhite(*sep))
 660                         sep++;
 661                 if (*sep != 0)
 662                         *sep++ = 0;
 663
 664                 if (ntokens == 1) {
 665                         tmp2 = &nets;           /* expanding nets */
 666                 } else if (ntokens == 2 &&
 667                            lnet_parse_hops(token, &hops)) {
 668                         got_hops = 1;           /* got a hop count */
 669                         continue;
 670                 } else {
 671                         tmp2 = &gateways;       /* expanding gateways */
 672                 }
 673
 674                 ltb = lnet_new_text_buf(strlen(token));
 675                 if (ltb == NULL)
 676                         goto out;
 677
 678                 strcpy(ltb->ltb_text, token);
 679                 tmp1 = &ltb->ltb_list;
 680                 cfs_list_add_tail(tmp1, tmp2);
 681
 682                 while (tmp1 != tmp2) {
 683                         ltb = cfs_list_entry(tmp1, lnet_text_buf_t, ltb_list);
 684
 685                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 686                         if (rc < 0)
 687                                 goto token_error;
 688
 689                         tmp1 = tmp1->next;
 690
 691                         if (rc > 0) {           /* expanded! */
 692                                 cfs_list_del(&ltb->ltb_list);
 693                                 lnet_free_text_buf(ltb);
 694                                 continue;
 695                         }
 696
 697                         if (ntokens == 1) {
 698                                 net = libcfs_str2net(ltb->ltb_text);
 699                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 700                                     LNET_NETTYP(net) == LOLND)
 701                                         goto token_error;
 702                         } else {
 703                                 nid = libcfs_str2nid(ltb->ltb_text);
 704                                 if (nid == LNET_NID_ANY ||
 705                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 706                                         goto token_error;
 707                         }
 708                 }
 709         }
 710
 711         if (!got_hops)
 712                 hops = 1;
 713
 714         LASSERT (!cfs_list_empty(&nets));
 715         LASSERT (!cfs_list_empty(&gateways));
 716
 717         cfs_list_for_each (tmp1, &nets) {
 718                 ltb = cfs_list_entry(tmp1, lnet_text_buf_t, ltb_list);
 719                 net = libcfs_str2net(ltb->ltb_text);
 720                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
 721
 722                 cfs_list_for_each (tmp2, &gateways) {
 723                         ltb = cfs_list_entry(tmp2, lnet_text_buf_t, ltb_list);
 724                         nid = libcfs_str2nid(ltb->ltb_text);
 725                         LASSERT (nid != LNET_NID_ANY);
 726
 727                         if (lnet_islocalnid(nid)) {
 728                                 *im_a_router = 1;
 729                                 continue;
 730                         }
 731
 732                         rc = lnet_add_route (net, hops, nid);
 733                         if (rc != 0) {
 734                                 CERROR("Can't create route "
 735                                        "to %s via %s\n",
 736                                        libcfs_net2str(net),
 737                                        libcfs_nid2str(nid));
 738                                 goto out;
 739                         }
 740                 }
 741         }
 742
 743         myrc = 0;
 744         goto out;
 745
 746  token_error:
 747         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 748  out:
 749         lnet_free_text_bufs(&nets);
 750         lnet_free_text_bufs(&gateways);
 751         return myrc;
 752 }
 753
 754 int
 755 lnet_parse_route_tbs(cfs_list_t *tbs, int *im_a_router)
 756 {
 757         lnet_text_buf_t   *ltb;
 758
 759         while (!cfs_list_empty(tbs)) {
 760                 ltb = cfs_list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 761
 762                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 763                         lnet_free_text_bufs(tbs);
 764                         return -EINVAL;
 765                 }
 766
 767                 cfs_list_del(&ltb->ltb_list);
 768                 lnet_free_text_buf(ltb);
 769         }
 770
 771         return 0;
 772 }
 773
 774 int
 775 lnet_parse_routes (char *routes, int *im_a_router)
 776 {
 777         cfs_list_t        tbs;
 778         int               rc = 0;
 779
 780         *im_a_router = 0;
 781
 782         CFS_INIT_LIST_HEAD(&tbs);
 783
 784         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 785                 CERROR("Error parsing routes\n");
 786                 rc = -EINVAL;
 787         } else {
 788                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 789         }
 790
 791         LASSERT (lnet_tbnob == 0);
 792         return rc;
 793 }
 794
 795 int
 796 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 797 {
 798         CFS_LIST_HEAD   (list);
 799         int             rc;
 800         int             i;
 801
 802         rc = cfs_ip_addr_parse(token, len, &list);
 803         if (rc != 0)
 804                 return rc;
 805
 806         for (rc = i = 0; !rc && i < nip; i++)
 807                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 808
 809         cfs_ip_addr_free(&list);
 810
 811         return rc;
 812 }
 813
 814 int
 815 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 816 {
 817         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 818
 819         int   matched = 0;
 820         int   ntokens = 0;
 821         int   len;
 822         char *net = NULL;
 823         char *sep;
 824         char *token;
 825         int   rc;
 826
 827         LASSERT (strlen(net_entry) < sizeof(tokens));
 828
 829         /* work on a copy of the string */
 830         strcpy(tokens, net_entry);
 831         sep = tokens;
 832         for (;;) {
 833                 /* scan for token start */
 834                 while (cfs_iswhite(*sep))
 835                         sep++;
 836                 if (*sep == 0)
 837                         break;
 838
 839                 token = sep++;
 840
 841                 /* scan for token end */
 842                 while (*sep != 0 && !cfs_iswhite(*sep))
 843                         sep++;
 844                 if (*sep != 0)
 845                         *sep++ = 0;
 846
 847                 if (ntokens++ == 0) {
 848                         net = token;
 849                         continue;
 850                 }
 851
 852                 len = strlen(token);
 853
 854                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 855                 if (rc < 0) {
 856                         lnet_syntax("ip2nets", net_entry,
 857                                     (int)(token - tokens), len);
 858                         return rc;
 859                 }
 860
 861                 matched |= (rc != 0);
 862         }
 863
 864         if (!matched)
 865                 return 0;
 866
 867         strcpy(net_entry, net);                 /* replace with matched net */
 868         return 1;
 869 }
 870
 871 __u32
 872 lnet_netspec2net(char *netspec)
 873 {
 874         char   *bracket = strchr(netspec, '(');
 875         __u32   net;
 876
 877         if (bracket != NULL)
 878                 *bracket = 0;
 879
 880         net = libcfs_str2net(netspec);
 881
 882         if (bracket != NULL)
 883                 *bracket = '(';
 884
 885         return net;
 886 }
 887
 888 int
 889 lnet_splitnets(char *source, cfs_list_t *nets)
 890 {
 891         int               offset = 0;
 892         int               offset2;
 893         int               len;
 894         lnet_text_buf_t  *tb;
 895         lnet_text_buf_t  *tb2;
 896         cfs_list_t       *t;
 897         char             *sep;
 898         char             *bracket;
 899         __u32             net;
 900
 901         LASSERT (!cfs_list_empty(nets));
 902         LASSERT (nets->next == nets->prev);     /* single entry */
 903
 904         tb = cfs_list_entry(nets->next, lnet_text_buf_t, ltb_list);
 905
 906         for (;;) {
 907                 sep = strchr(tb->ltb_text, ',');
 908                 bracket = strchr(tb->ltb_text, '(');
 909
 910                 if (sep != NULL &&
 911                     bracket != NULL &&
 912                     bracket < sep) {
 913                         /* netspec lists interfaces... */
 914
 915                         offset2 = offset + (int)(bracket - tb->ltb_text);
 916                         len = strlen(bracket);
 917
 918                         bracket = strchr(bracket + 1, ')');
 919
 920                         if (bracket == NULL ||
 921                             !(bracket[1] == ',' || bracket[1] == 0)) {
 922                                 lnet_syntax("ip2nets", source, offset2, len);
 923                                 return -EINVAL;
 924                         }
 925
 926                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
 927                 }
 928
 929                 if (sep != NULL)
 930                         *sep++ = 0;
 931
 932                 net = lnet_netspec2net(tb->ltb_text);
 933                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 934                         lnet_syntax("ip2nets", source, offset,
 935                                     strlen(tb->ltb_text));
 936                         return -EINVAL;
 937                 }
 938
 939                 cfs_list_for_each(t, nets) {
 940                         tb2 = cfs_list_entry(t, lnet_text_buf_t, ltb_list);
 941
 942                         if (tb2 == tb)
 943                                 continue;
 944
 945                         if (net == lnet_netspec2net(tb2->ltb_text)) {
 946                                 /* duplicate network */
 947                                 lnet_syntax("ip2nets", source, offset,
 948                                             strlen(tb->ltb_text));
 949                                 return -EINVAL;
 950                         }
 951                 }
 952
 953                 if (sep == NULL)
 954                         return 0;
 955
 956                 offset += (int)(sep - tb->ltb_text);
 957                 tb2 = lnet_new_text_buf(strlen(sep));
 958                 if (tb2 == NULL)
 959                         return -ENOMEM;
 960
 961                 strcpy(tb2->ltb_text, sep);
 962                 cfs_list_add_tail(&tb2->ltb_list, nets);
 963
 964                 tb = tb2;
 965         }
 966 }
 967
 968 int
 969 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
 970 {
 971         static char        networks[LNET_SINGLE_TEXTBUF_NOB];
 972         static char        source[LNET_SINGLE_TEXTBUF_NOB];
 973
 974         cfs_list_t          raw_entries;
 975         cfs_list_t          matched_nets;
 976         cfs_list_t          current_nets;
 977         cfs_list_t         *t;
 978         cfs_list_t         *t2;
 979         lnet_text_buf_t    *tb;
 980         lnet_text_buf_t    *tb2;
 981         __u32               net1;
 982         __u32               net2;
 983         int                 len;
 984         int                 count;
 985         int                 dup;
 986         int                 rc;
 987
 988         CFS_INIT_LIST_HEAD(&raw_entries);
 989         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
 990                 CERROR("Error parsing ip2nets\n");
 991                 LASSERT (lnet_tbnob == 0);
 992                 return -EINVAL;
 993         }
 994
 995         CFS_INIT_LIST_HEAD(&matched_nets);
 996         CFS_INIT_LIST_HEAD(&current_nets);
 997         networks[0] = 0;
 998         count = 0;
 999         len = 0;
1000         rc = 0;
1001
1002         while (!cfs_list_empty(&raw_entries)) {
1003                 tb = cfs_list_entry(raw_entries.next, lnet_text_buf_t,
1004                                     ltb_list);
1005
1006                 strncpy(source, tb->ltb_text, sizeof(source)-1);
1007                 source[sizeof(source)-1] = 0;
1008
1009                 /* replace ltb_text with the network(s) add on match */
1010                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1011                 if (rc < 0)
1012                         break;
1013
1014                 cfs_list_del(&tb->ltb_list);
1015
1016                 if (rc == 0) {                  /* no match */
1017                         lnet_free_text_buf(tb);
1018                         continue;
1019                 }
1020
1021                 /* split into separate networks */
1022                 CFS_INIT_LIST_HEAD(&current_nets);
1023                 cfs_list_add(&tb->ltb_list, &current_nets);
1024                 rc = lnet_splitnets(source, &current_nets);
1025                 if (rc < 0)
1026                         break;
1027
1028                 dup = 0;
1029                 cfs_list_for_each (t, &current_nets) {
1030                         tb = cfs_list_entry(t, lnet_text_buf_t, ltb_list);
1031                         net1 = lnet_netspec2net(tb->ltb_text);
1032                         LASSERT (net1 != LNET_NIDNET(LNET_NID_ANY));
1033
1034                         cfs_list_for_each(t2, &matched_nets) {
1035                                 tb2 = cfs_list_entry(t2, lnet_text_buf_t,
1036                                                      ltb_list);
1037                                 net2 = lnet_netspec2net(tb2->ltb_text);
1038                                 LASSERT (net2 != LNET_NIDNET(LNET_NID_ANY));
1039
1040                                 if (net1 == net2) {
1041                                         dup = 1;
1042                                         break;
1043                                 }
1044                         }
1045
1046                         if (dup)
1047                                 break;
1048                 }
1049
1050                 if (dup) {
1051                         lnet_free_text_bufs(&current_nets);
1052                         continue;
1053                 }
1054
1055                 cfs_list_for_each_safe(t, t2, &current_nets) {
1056                         tb = cfs_list_entry(t, lnet_text_buf_t, ltb_list);
1057
1058                         cfs_list_del(&tb->ltb_list);
1059                         cfs_list_add_tail(&tb->ltb_list, &matched_nets);
1060
1061                         len += snprintf(networks + len, sizeof(networks) - len,
1062                                         "%s%s", (len == 0) ? "" : ",",
1063                                         tb->ltb_text);
1064
1065                         if (len >= sizeof(networks)) {
1066                                 CERROR("Too many matched networks\n");
1067                                 rc = -E2BIG;
1068                                 goto out;
1069                         }
1070                 }
1071
1072                 count++;
1073         }
1074
1075  out:
1076         lnet_free_text_bufs(&raw_entries);
1077         lnet_free_text_bufs(&matched_nets);
1078         lnet_free_text_bufs(&current_nets);
1079         LASSERT (lnet_tbnob == 0);
1080
1081         if (rc < 0)
1082                 return rc;
1083
1084         *networksp = networks;
1085         return count;
1086 }
1087
1088 #ifdef __KERNEL__
1089 void
1090 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1091 {
1092         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1093 }
1094
1095 int
1096 lnet_ipaddr_enumerate (__u32 **ipaddrsp)
1097 {
1098         int        up;
1099         __u32      netmask;
1100         __u32     *ipaddrs;
1101         __u32     *ipaddrs2;
1102         int        nip;
1103         char     **ifnames;
1104         int        nif = libcfs_ipif_enumerate(&ifnames);
1105         int        i;
1106         int        rc;
1107
1108         if (nif <= 0)
1109                 return nif;
1110
1111         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1112         if (ipaddrs == NULL) {
1113                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1114                 libcfs_ipif_free_enumeration(ifnames, nif);
1115                 return -ENOMEM;
1116         }
1117
1118         for (i = nip = 0; i < nif; i++) {
1119                 if (!strcmp(ifnames[i], "lo"))
1120                         continue;
1121
1122                 rc = libcfs_ipif_query(ifnames[i], &up,
1123                                        &ipaddrs[nip], &netmask);
1124                 if (rc != 0) {
1125                         CWARN("Can't query interface %s: %d\n",
1126                               ifnames[i], rc);
1127                         continue;
1128                 }
1129
1130                 if (!up) {
1131                         CWARN("Ignoring interface %s: it's down\n",
1132                               ifnames[i]);
1133                         continue;
1134                 }
1135
1136                 nip++;
1137         }
1138
1139         libcfs_ipif_free_enumeration(ifnames, nif);
1140
1141         if (nip == nif) {
1142                 *ipaddrsp = ipaddrs;
1143         } else {
1144                 if (nip > 0) {
1145                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1146                         if (ipaddrs2 == NULL) {
1147                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1148                                 nip = -ENOMEM;
1149                         } else {
1150                                 memcpy(ipaddrs2, ipaddrs,
1151                                        nip * sizeof(*ipaddrs));
1152                                 *ipaddrsp = ipaddrs2;
1153                                 rc = nip;
1154                         }
1155                 }
1156                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1157         }
1158         return nip;
1159 }
1160
1161 int
1162 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1163 {
1164         __u32     *ipaddrs;
1165         int        nip = lnet_ipaddr_enumerate(&ipaddrs);
1166         int        rc;
1167
1168         if (nip < 0) {
1169                 LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP "
1170                                    "interfaces for ip2nets to match\n", nip);
1171                 return nip;
1172         }
1173
1174         if (nip == 0) {
1175                 LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces "
1176                                    "for ip2nets to match\n");
1177                 return -ENOENT;
1178         }
1179
1180         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1181         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1182
1183         if (rc < 0) {
1184                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1185                 return rc;
1186         }
1187
1188         if (rc == 0) {
1189                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1190                                    "any local IP interfaces\n");
1191                 return -ENOENT;
1192         }
1193
1194         return 0;
1195 }
1196
1197 int
1198 lnet_set_ip_niaddr (lnet_ni_t *ni)
1199 {
1200         __u32  net = LNET_NIDNET(ni->ni_nid);
1201         char **names;
1202         int    n;
1203         __u32  ip;
1204         __u32  netmask;
1205         int    up;
1206         int    i;
1207         int    rc;
1208
1209         /* Convenience for LNDs that use the IP address of a local interface as
1210          * the local address part of their NID */
1211
1212         if (ni->ni_interfaces[0] != NULL) {
1213
1214                 CLASSERT (LNET_MAX_INTERFACES > 1);
1215
1216                 if (ni->ni_interfaces[1] != NULL) {
1217                         CERROR("Net %s doesn't support multiple interfaces\n",
1218                                libcfs_net2str(net));
1219                         return -EPERM;
1220                 }
1221
1222                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1223                                        &up, &ip, &netmask);
1224                 if (rc != 0) {
1225                         CERROR("Net %s can't query interface %s: %d\n",
1226                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1227                         return -EPERM;
1228                 }
1229
1230                 if (!up) {
1231                         CERROR("Net %s can't use interface %s: it's down\n",
1232                                libcfs_net2str(net), ni->ni_interfaces[0]);
1233                         return -ENETDOWN;
1234                 }
1235
1236                 ni->ni_nid = LNET_MKNID(net, ip);
1237                 return 0;
1238         }
1239
1240         n = libcfs_ipif_enumerate(&names);
1241         if (n <= 0) {
1242                 CERROR("Net %s can't enumerate interfaces: %d\n",
1243                        libcfs_net2str(net), n);
1244                 return 0;
1245         }
1246
1247         for (i = 0; i < n; i++) {
1248                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1249                         continue;
1250
1251                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1252
1253                 if (rc != 0) {
1254                         CWARN("Net %s can't query interface %s: %d\n",
1255                               libcfs_net2str(net), names[i], rc);
1256                         continue;
1257                 }
1258
1259                 if (!up) {
1260                         CWARN("Net %s ignoring interface %s (down)\n",
1261                               libcfs_net2str(net), names[i]);
1262                         continue;
1263                 }
1264
1265                 libcfs_ipif_free_enumeration(names, n);
1266                 ni->ni_nid = LNET_MKNID(net, ip);
1267                 return 0;
1268         }
1269
1270         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1271         libcfs_ipif_free_enumeration(names, n);
1272         return -ENOENT;
1273 }
1274 EXPORT_SYMBOL(lnet_set_ip_niaddr);
1275
1276 #endif