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  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LNET
  38 #include <lnet/lib-lnet.h>
  39
  40 /* tmp struct for parsing routes */
  41 struct lnet_text_buf {
  42         struct list_head        ltb_list;       /* stash on lists */
  43         int                     ltb_size;       /* allocated size */
  44         char                    ltb_text[0];    /* text buffer */
  45 };
  46
  47 static int lnet_tbnob = 0;                      /* track text buf allocation */
  48 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  49 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  50
  51 void
  52 lnet_syntax(char *name, char *str, int offset, int width)
  53 {
  54         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  55         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  56
  57         memset(dots, '.', sizeof(dots));
  58         dots[sizeof(dots)-1] = 0;
  59         memset(dashes, '-', sizeof(dashes));
  60         dashes[sizeof(dashes)-1] = 0;
  61
  62         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  63         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  64                            (int)strlen(name), dots, offset, dots,
  65                             (width < 1) ? 0 : width - 1, dashes);
  66 }
  67
  68 int
  69 lnet_issep (char c)
  70 {
  71         switch (c) {
  72         case '\n':
  73         case '\r':
  74         case ';':
  75                 return 1;
  76         default:
  77                 return 0;
  78         }
  79 }
  80
  81 int
  82 lnet_net_unique(__u32 net, struct list_head *nilist)
  83 {
  84         struct list_head *tmp;
  85         lnet_ni_t        *ni;
  86
  87         list_for_each(tmp, nilist) {
  88                 ni = list_entry(tmp, lnet_ni_t, ni_list);
  89
  90                 if (LNET_NIDNET(ni->ni_nid) == net)
  91                         return 0;
  92         }
  93
  94         return 1;
  95 }
  96
  97 void
  98 lnet_ni_free(struct lnet_ni *ni)
  99 {
 100         int i;
 101
 102         if (ni->ni_refs != NULL)
 103                 cfs_percpt_free(ni->ni_refs);
 104
 105         if (ni->ni_tx_queues != NULL)
 106                 cfs_percpt_free(ni->ni_tx_queues);
 107
 108         if (ni->ni_cpts != NULL)
 109                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 110
 111 #ifndef __KERNEL__
 112 # ifdef HAVE_LIBPTHREAD
 113         pthread_mutex_destroy(&ni->ni_lock);
 114 # endif
 115 #endif
 116         for (i = 0; i < LNET_MAX_INTERFACES &&
 117                     ni->ni_interfaces[i] != NULL; i++) {
 118                 LIBCFS_FREE(ni->ni_interfaces[i],
 119                             strlen(ni->ni_interfaces[i]) + 1);
 120         }
 121         LIBCFS_FREE(ni, sizeof(*ni));
 122 }
 123
 124 lnet_ni_t *
 125 lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, struct list_head *nilist)
 126 {
 127         struct lnet_tx_queue    *tq;
 128         struct lnet_ni          *ni;
 129         int                     rc;
 130         int                     i;
 131
 132         if (!lnet_net_unique(net, nilist)) {
 133                 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
 134                                    libcfs_net2str(net));
 135                 return NULL;
 136         }
 137
 138         LIBCFS_ALLOC(ni, sizeof(*ni));
 139         if (ni == NULL) {
 140                 CERROR("Out of memory creating network %s\n",
 141                        libcfs_net2str(net));
 142                 return NULL;
 143         }
 144
 145 #ifdef __KERNEL__
 146         spin_lock_init(&ni->ni_lock);
 147 #else
 148 # ifdef HAVE_LIBPTHREAD
 149         pthread_mutex_init(&ni->ni_lock, NULL);
 150 # endif
 151 #endif
 152         INIT_LIST_HEAD(&ni->ni_cptlist);
 153         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 154                                        sizeof(*ni->ni_refs[0]));
 155         if (ni->ni_refs == NULL)
 156                 goto failed;
 157
 158         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 159                                             sizeof(*ni->ni_tx_queues[0]));
 160         if (ni->ni_tx_queues == NULL)
 161                 goto failed;
 162
 163         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 164                 INIT_LIST_HEAD(&tq->tq_delayed);
 165
 166         if (el == NULL) {
 167                 ni->ni_cpts  = NULL;
 168                 ni->ni_ncpts = LNET_CPT_NUMBER;
 169         } else {
 170                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 171                 if (rc <= 0) {
 172                         CERROR("Failed to set CPTs for NI %s: %d\n",
 173                                libcfs_net2str(net), rc);
 174                         goto failed;
 175                 }
 176
 177                 LASSERT(rc <= LNET_CPT_NUMBER);
 178                 if (rc == LNET_CPT_NUMBER) {
 179                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 180                         ni->ni_cpts = NULL;
 181                 }
 182
 183                 ni->ni_ncpts = rc;
 184         }
 185
 186         /* LND will fill in the address part of the NID */
 187         ni->ni_nid = LNET_MKNID(net, 0);
 188         ni->ni_last_alive = cfs_time_current_sec();
 189         list_add_tail(&ni->ni_list, nilist);
 190         return ni;
 191  failed:
 192         lnet_ni_free(ni);
 193         return NULL;
 194 }
 195
 196 int
 197 lnet_parse_networks(struct list_head *nilist, char *networks)
 198 {
 199         struct cfs_expr_list *el = NULL;
 200         int             tokensize = strlen(networks) + 1;
 201         char            *tokens;
 202         char            *str;
 203         char            *tmp;
 204         struct lnet_ni  *ni;
 205         __u32           net;
 206         int             nnets = 0;
 207
 208         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 209                 /* _WAY_ conservative */
 210                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 211                                    "long\n");
 212                 return -EINVAL;
 213         }
 214
 215         LIBCFS_ALLOC(tokens, tokensize);
 216         if (tokens == NULL) {
 217                 CERROR("Can't allocate net tokens\n");
 218                 return -ENOMEM;
 219         }
 220
 221         memcpy(tokens, networks, tokensize);
 222         str = tmp = tokens;
 223
 224         /* Add in the loopback network */
 225         ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist);
 226         if (ni == NULL)
 227                 goto failed;
 228
 229         while (str != NULL && *str != 0) {
 230                 char    *comma = strchr(str, ',');
 231                 char    *bracket = strchr(str, '(');
 232                 char    *square = strchr(str, '[');
 233                 char    *iface;
 234                 int     niface;
 235                 int     rc;
 236
 237                 /* NB we don't check interface conflicts here; it's the LNDs
 238                  * responsibility (if it cares at all) */
 239
 240                 if (square != NULL && (comma == NULL || square < comma)) {
 241                         /* i.e: o2ib0(ib0)[1,2], number between square
 242                          * brackets are CPTs this NI needs to be bond */
 243                         if (bracket != NULL && bracket > square) {
 244                                 tmp = square;
 245                                 goto failed_syntax;
 246                         }
 247
 248                         tmp = strchr(square, ']');
 249                         if (tmp == NULL) {
 250                                 tmp = square;
 251                                 goto failed_syntax;
 252                         }
 253
 254                         rc = cfs_expr_list_parse(square, tmp - square + 1,
 255                                                  0, LNET_CPT_NUMBER - 1, &el);
 256                         if (rc != 0) {
 257                                 tmp = square;
 258                                 goto failed_syntax;
 259                         }
 260
 261                         while (square <= tmp)
 262                                 *square++ = ' ';
 263                 }
 264
 265                 if (bracket == NULL ||
 266                     (comma != NULL && comma < bracket)) {
 267
 268                         /* no interface list specified */
 269
 270                         if (comma != NULL)
 271                                 *comma++ = 0;
 272                         net = libcfs_str2net(cfs_trimwhite(str));
 273
 274                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 275                                 LCONSOLE_ERROR_MSG(0x113, "Unrecognised network"
 276                                                    " type\n");
 277                                 tmp = str;
 278                                 goto failed_syntax;
 279                         }
 280
 281                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 282                             lnet_ni_alloc(net, el, nilist) == NULL)
 283                                 goto failed;
 284
 285                         if (el != NULL) {
 286                                 cfs_expr_list_free(el);
 287                                 el = NULL;
 288                         }
 289
 290                         str = comma;
 291                         continue;
 292                 }
 293
 294                 *bracket = 0;
 295                 net = libcfs_str2net(cfs_trimwhite(str));
 296                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 297                         tmp = str;
 298                         goto failed_syntax;
 299                 }
 300
 301                 nnets++;
 302                 ni = lnet_ni_alloc(net, el, nilist);
 303                 if (ni == NULL)
 304                         goto failed;
 305
 306                 if (el != NULL) {
 307                         cfs_expr_list_free(el);
 308                         el = NULL;
 309                 }
 310
 311                 niface = 0;
 312                 iface = bracket + 1;
 313
 314                 bracket = strchr(iface, ')');
 315                 if (bracket == NULL) {
 316                         tmp = iface;
 317                         goto failed_syntax;
 318                 }
 319
 320                 *bracket = 0;
 321                 do {
 322                         comma = strchr(iface, ',');
 323                         if (comma != NULL)
 324                                 *comma++ = 0;
 325
 326                         iface = cfs_trimwhite(iface);
 327                         if (*iface == 0) {
 328                                 tmp = iface;
 329                                 goto failed_syntax;
 330                         }
 331
 332                         if (niface == LNET_MAX_INTERFACES) {
 333                                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 334                                                    "for net %s\n",
 335                                                    libcfs_net2str(net));
 336                                 goto failed;
 337                         }
 338
 339                         /* Allocate a seperate piece of memory and copy
 340                          * into it the string, so we don't have
 341                          * a depencency on the tokens string.  This way we
 342                          * can free the tokens at the end of the function.
 343                          * The newly allocated ni_interfaces[] can be
 344                          * freed when freeing the NI */
 345                         LIBCFS_ALLOC(ni->ni_interfaces[niface],
 346                                      strlen(iface) + 1);
 347                         if (ni->ni_interfaces[niface] == NULL) {
 348                                 CERROR("Can't allocate net interface name\n");
 349                                 goto failed;
 350                         }
 351                         strncpy(ni->ni_interfaces[niface], iface,
 352                                 strlen(iface));
 353                         niface++;
 354                         iface = comma;
 355                 } while (iface != NULL);
 356
 357                 str = bracket + 1;
 358                 comma = strchr(bracket + 1, ',');
 359                 if (comma != NULL) {
 360                         *comma = 0;
 361                         str = cfs_trimwhite(str);
 362                         if (*str != 0) {
 363                                 tmp = str;
 364                                 goto failed_syntax;
 365                         }
 366                         str = comma + 1;
 367                         continue;
 368                 }
 369
 370                 str = cfs_trimwhite(str);
 371                 if (*str != 0) {
 372                         tmp = str;
 373                         goto failed_syntax;
 374                 }
 375         }
 376
 377         LASSERT(!list_empty(nilist));
 378
 379         LIBCFS_FREE(tokens, tokensize);
 380         return 0;
 381
 382  failed_syntax:
 383         lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
 384  failed:
 385         while (!list_empty(nilist)) {
 386                 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
 387
 388                 list_del(&ni->ni_list);
 389                 lnet_ni_free(ni);
 390         }
 391
 392         if (el != NULL)
 393                 cfs_expr_list_free(el);
 394
 395         LIBCFS_FREE(tokens, tokensize);
 396
 397         return -EINVAL;
 398 }
 399
 400 struct lnet_text_buf *lnet_new_text_buf(int str_len)
 401 {
 402         struct lnet_text_buf *ltb;
 403         int nob;
 404
 405         /* NB allocate space for the terminating 0 */
 406         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 407         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 408                 /* _way_ conservative for "route net gateway..." */
 409                 CERROR("text buffer too big\n");
 410                 return NULL;
 411         }
 412
 413         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 414                 CERROR("Too many text buffers\n");
 415                 return NULL;
 416         }
 417
 418         LIBCFS_ALLOC(ltb, nob);
 419         if (ltb == NULL)
 420                 return NULL;
 421
 422         ltb->ltb_size = nob;
 423         ltb->ltb_text[0] = 0;
 424         lnet_tbnob += nob;
 425         return ltb;
 426 }
 427
 428 void
 429 lnet_free_text_buf(struct lnet_text_buf *ltb)
 430 {
 431         lnet_tbnob -= ltb->ltb_size;
 432         LIBCFS_FREE(ltb, ltb->ltb_size);
 433 }
 434
 435 void
 436 lnet_free_text_bufs(struct list_head *tbs)
 437 {
 438         struct lnet_text_buf  *ltb;
 439
 440         while (!list_empty(tbs)) {
 441                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 442
 443                 list_del(&ltb->ltb_list);
 444                 lnet_free_text_buf(ltb);
 445         }
 446 }
 447
 448 void
 449 lnet_print_text_bufs(struct list_head *tbs)
 450 {
 451         struct list_head *tmp;
 452         struct lnet_text_buf  *ltb;
 453
 454         list_for_each(tmp, tbs) {
 455                 ltb = list_entry(tmp, struct lnet_text_buf, ltb_list);
 456
 457                 CDEBUG(D_WARNING, "%s\n", ltb->ltb_text);
 458         }
 459
 460         CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob);
 461 }
 462
 463 int
 464 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 465 {
 466         struct list_head  pending;
 467         char             *sep;
 468         int               nob;
 469         int               i;
 470         struct lnet_text_buf  *ltb;
 471
 472         INIT_LIST_HEAD(&pending);
 473
 474         /* Split 'str' into separate commands */
 475         for (;;) {
 476                 /* skip leading whitespace */
 477                 while (cfs_iswhite(*str))
 478                         str++;
 479
 480                 /* scan for separator or comment */
 481                 for (sep = str; *sep != 0; sep++)
 482                         if (lnet_issep(*sep) || *sep == '#')
 483                                 break;
 484
 485                 nob = (int)(sep - str);
 486                 if (nob > 0) {
 487                         ltb = lnet_new_text_buf(nob);
 488                         if (ltb == NULL) {
 489                                 lnet_free_text_bufs(&pending);
 490                                 return -1;
 491                         }
 492
 493                         for (i = 0; i < nob; i++)
 494                                 if (cfs_iswhite(str[i]))
 495                                         ltb->ltb_text[i] = ' ';
 496                                 else
 497                                         ltb->ltb_text[i] = str[i];
 498
 499                         ltb->ltb_text[nob] = 0;
 500
 501                         list_add_tail(&ltb->ltb_list, &pending);
 502                 }
 503
 504                 if (*sep == '#') {
 505                         /* scan for separator */
 506                         do {
 507                                 sep++;
 508                         } while (*sep != 0 && !lnet_issep(*sep));
 509                 }
 510
 511                 if (*sep == 0)
 512                         break;
 513
 514                 str = sep + 1;
 515         }
 516
 517         list_splice(&pending, tbs->prev);
 518         return 0;
 519 }
 520
 521 int
 522 lnet_expand1tb(struct list_head *list,
 523                char *str, char *sep1, char *sep2,
 524                char *item, int itemlen)
 525 {
 526         int              len1 = (int)(sep1 - str);
 527         int              len2 = strlen(sep2 + 1);
 528         struct lnet_text_buf *ltb;
 529
 530         LASSERT (*sep1 == '[');
 531         LASSERT (*sep2 == ']');
 532
 533         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 534         if (ltb == NULL)
 535                 return -ENOMEM;
 536
 537         memcpy(ltb->ltb_text, str, len1);
 538         memcpy(&ltb->ltb_text[len1], item, itemlen);
 539         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 540         ltb->ltb_text[len1 + itemlen + len2] = 0;
 541
 542         list_add_tail(&ltb->ltb_list, list);
 543         return 0;
 544 }
 545
 546 int
 547 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 548 {
 549         char              num[16];
 550         struct list_head  pending;
 551         char             *sep;
 552         char             *sep2;
 553         char             *parsed;
 554         char             *enditem;
 555         int               lo;
 556         int               hi;
 557         int               stride;
 558         int               i;
 559         int               nob;
 560         int               scanned;
 561
 562         INIT_LIST_HEAD(&pending);
 563
 564         sep = strchr(str, '[');
 565         if (sep == NULL)                        /* nothing to expand */
 566                 return 0;
 567
 568         sep2 = strchr(sep, ']');
 569         if (sep2 == NULL)
 570                 goto failed;
 571
 572         for (parsed = sep; parsed < sep2; parsed = enditem) {
 573
 574                 enditem = ++parsed;
 575                 while (enditem < sep2 && *enditem != ',')
 576                         enditem++;
 577
 578                 if (enditem == parsed)          /* no empty items */
 579                         goto failed;
 580
 581                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
 582
 583                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 584
 585                                 /* simple string enumeration */
 586                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 587                                                    parsed, (int)(enditem - parsed)) != 0)
 588                                         goto failed;
 589
 590                                 continue;
 591                         }
 592
 593                         stride = 1;
 594                 }
 595
 596                 /* range expansion */
 597
 598                 if (enditem != parsed + scanned) /* no trailing junk */
 599                         goto failed;
 600
 601                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 602                     (hi - lo) % stride != 0)
 603                         goto failed;
 604
 605                 for (i = lo; i <= hi; i += stride) {
 606
 607                         snprintf(num, sizeof(num), "%d", i);
 608                         nob = strlen(num);
 609                         if (nob + 1 == sizeof(num))
 610                                 goto failed;
 611
 612                         if (lnet_expand1tb(&pending, str, sep, sep2,
 613                                            num, nob) != 0)
 614                                 goto failed;
 615                 }
 616         }
 617
 618         list_splice(&pending, tbs->prev);
 619         return 1;
 620
 621  failed:
 622         lnet_free_text_bufs(&pending);
 623         return -1;
 624 }
 625
 626 int
 627 lnet_parse_hops (char *str, unsigned int *hops)
 628 {
 629         int     len = strlen(str);
 630         int     nob = len;
 631
 632         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 633                 nob == len &&
 634                 *hops > 0 && *hops < 256);
 635 }
 636
 637 #define LNET_PRIORITY_SEPARATOR (':')
 638
 639 int
 640 lnet_parse_priority(char *str, unsigned int *priority, char **token)
 641 {
 642         int   nob;
 643         char *sep;
 644         int   len;
 645
 646         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
 647         if (sep == NULL) {
 648                 *priority = 0;
 649                 return 0;
 650         }
 651         len = strlen(sep + 1);
 652
 653         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
 654                 /* Update the caller's token pointer so it treats the found
 655                    priority as the token to report in the error message. */
 656                 *token += sep - str + 1;
 657                 return -1;
 658         }
 659
 660         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
 661
 662         /*
 663          * Change priority separator to \0 to be able to parse NID
 664          */
 665         *sep = '\0';
 666         return 0;
 667 }
 668
 669 int
 670 lnet_parse_route (char *str, int *im_a_router)
 671 {
 672         /* static scratch buffer OK (single threaded) */
 673         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 674
 675         struct list_head  nets;
 676         struct list_head  gateways;
 677         struct list_head *tmp1;
 678         struct list_head *tmp2;
 679         __u32             net;
 680         lnet_nid_t        nid;
 681         struct lnet_text_buf  *ltb;
 682         int               rc;
 683         char             *sep;
 684         char             *token = str;
 685         int               ntokens = 0;
 686         int               myrc = -1;
 687         unsigned int      hops;
 688         int               got_hops = 0;
 689         unsigned int      priority = 0;
 690
 691         INIT_LIST_HEAD(&gateways);
 692         INIT_LIST_HEAD(&nets);
 693
 694         /* save a copy of the string for error messages */
 695         strncpy(cmd, str, sizeof(cmd));
 696         cmd[sizeof(cmd) - 1] = '\0';
 697
 698         sep = str;
 699         for (;;) {
 700                 /* scan for token start */
 701                 while (cfs_iswhite(*sep))
 702                         sep++;
 703                 if (*sep == 0) {
 704                         if (ntokens < (got_hops ? 3 : 2))
 705                                 goto token_error;
 706                         break;
 707                 }
 708
 709                 ntokens++;
 710                 token = sep++;
 711
 712                 /* scan for token end */
 713                 while (*sep != 0 && !cfs_iswhite(*sep))
 714                         sep++;
 715                 if (*sep != 0)
 716                         *sep++ = 0;
 717
 718                 if (ntokens == 1) {
 719                         tmp2 = &nets;           /* expanding nets */
 720                 } else if (ntokens == 2 &&
 721                            lnet_parse_hops(token, &hops)) {
 722                         got_hops = 1;           /* got a hop count */
 723                         continue;
 724                 } else {
 725                         tmp2 = &gateways;       /* expanding gateways */
 726                 }
 727
 728                 ltb = lnet_new_text_buf(strlen(token));
 729                 if (ltb == NULL)
 730                         goto out;
 731
 732                 strcpy(ltb->ltb_text, token);
 733                 tmp1 = &ltb->ltb_list;
 734                 list_add_tail(tmp1, tmp2);
 735
 736                 while (tmp1 != tmp2) {
 737                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 738
 739                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 740                         if (rc < 0)
 741                                 goto token_error;
 742
 743                         tmp1 = tmp1->next;
 744
 745                         if (rc > 0) {           /* expanded! */
 746                                 list_del(&ltb->ltb_list);
 747                                 lnet_free_text_buf(ltb);
 748                                 continue;
 749                         }
 750
 751                         if (ntokens == 1) {
 752                                 net = libcfs_str2net(ltb->ltb_text);
 753                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 754                                     LNET_NETTYP(net) == LOLND)
 755                                         goto token_error;
 756                         } else {
 757                                 rc = lnet_parse_priority(ltb->ltb_text,
 758                                                          &priority, &token);
 759                                 if (rc < 0)
 760                                         goto token_error;
 761
 762                                 nid = libcfs_str2nid(ltb->ltb_text);
 763                                 if (nid == LNET_NID_ANY ||
 764                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 765                                         goto token_error;
 766                         }
 767                 }
 768         }
 769
 770         if (!got_hops)
 771                 hops = 1;
 772
 773         LASSERT(!list_empty(&nets));
 774         LASSERT(!list_empty(&gateways));
 775
 776         list_for_each(tmp1, &nets) {
 777                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 778                 net = libcfs_str2net(ltb->ltb_text);
 779                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
 780
 781                 list_for_each(tmp2, &gateways) {
 782                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
 783                         nid = libcfs_str2nid(ltb->ltb_text);
 784                         LASSERT(nid != LNET_NID_ANY);
 785
 786                         if (lnet_islocalnid(nid)) {
 787                                 *im_a_router = 1;
 788                                 continue;
 789                         }
 790
 791                         rc = lnet_add_route(net, hops, nid, priority);
 792                         if (rc != 0) {
 793                                 CERROR("Can't create route "
 794                                        "to %s via %s\n",
 795                                        libcfs_net2str(net),
 796                                        libcfs_nid2str(nid));
 797                                 goto out;
 798                         }
 799                 }
 800         }
 801
 802         myrc = 0;
 803         goto out;
 804
 805 token_error:
 806         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 807 out:
 808         lnet_free_text_bufs(&nets);
 809         lnet_free_text_bufs(&gateways);
 810         return myrc;
 811 }
 812
 813 int
 814 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 815 {
 816         struct lnet_text_buf   *ltb;
 817
 818         while (!list_empty(tbs)) {
 819                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 820
 821                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 822                         lnet_free_text_bufs(tbs);
 823                         return -EINVAL;
 824                 }
 825
 826                 list_del(&ltb->ltb_list);
 827                 lnet_free_text_buf(ltb);
 828         }
 829
 830         return 0;
 831 }
 832
 833 int
 834 lnet_parse_routes (char *routes, int *im_a_router)
 835 {
 836         struct list_head tbs;
 837         int              rc = 0;
 838
 839         *im_a_router = 0;
 840
 841         INIT_LIST_HEAD(&tbs);
 842
 843         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 844                 CERROR("Error parsing routes\n");
 845                 rc = -EINVAL;
 846         } else {
 847                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 848         }
 849
 850         LASSERT (lnet_tbnob == 0);
 851         return rc;
 852 }
 853
 854 int
 855 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 856 {
 857         struct list_head list = LIST_HEAD_INIT(list);
 858         int             rc;
 859         int             i;
 860
 861         rc = cfs_ip_addr_parse(token, len, &list);
 862         if (rc != 0)
 863                 return rc;
 864
 865         for (rc = i = 0; !rc && i < nip; i++)
 866                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 867
 868         cfs_ip_addr_free(&list);
 869
 870         return rc;
 871 }
 872
 873 int
 874 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 875 {
 876         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 877
 878         int   matched = 0;
 879         int   ntokens = 0;
 880         int   len;
 881         char *net = NULL;
 882         char *sep;
 883         char *token;
 884         int   rc;
 885
 886         LASSERT (strlen(net_entry) < sizeof(tokens));
 887
 888         /* work on a copy of the string */
 889         strcpy(tokens, net_entry);
 890         sep = tokens;
 891         for (;;) {
 892                 /* scan for token start */
 893                 while (cfs_iswhite(*sep))
 894                         sep++;
 895                 if (*sep == 0)
 896                         break;
 897
 898                 token = sep++;
 899
 900                 /* scan for token end */
 901                 while (*sep != 0 && !cfs_iswhite(*sep))
 902                         sep++;
 903                 if (*sep != 0)
 904                         *sep++ = 0;
 905
 906                 if (ntokens++ == 0) {
 907                         net = token;
 908                         continue;
 909                 }
 910
 911                 len = strlen(token);
 912
 913                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 914                 if (rc < 0) {
 915                         lnet_syntax("ip2nets", net_entry,
 916                                     (int)(token - tokens), len);
 917                         return rc;
 918                 }
 919
 920                 matched |= (rc != 0);
 921         }
 922
 923         if (!matched)
 924                 return 0;
 925
 926         strcpy(net_entry, net);                 /* replace with matched net */
 927         return 1;
 928 }
 929
 930 __u32
 931 lnet_netspec2net(char *netspec)
 932 {
 933         char   *bracket = strchr(netspec, '(');
 934         __u32   net;
 935
 936         if (bracket != NULL)
 937                 *bracket = 0;
 938
 939         net = libcfs_str2net(netspec);
 940
 941         if (bracket != NULL)
 942                 *bracket = '(';
 943
 944         return net;
 945 }
 946
 947 int
 948 lnet_splitnets(char *source, struct list_head *nets)
 949 {
 950         int               offset = 0;
 951         int               offset2;
 952         int               len;
 953         struct lnet_text_buf  *tb;
 954         struct lnet_text_buf  *tb2;
 955         struct list_head *t;
 956         char             *sep;
 957         char             *bracket;
 958         __u32             net;
 959
 960         LASSERT(!list_empty(nets));
 961         LASSERT(nets->next == nets->prev);      /* single entry */
 962
 963         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
 964
 965         for (;;) {
 966                 sep = strchr(tb->ltb_text, ',');
 967                 bracket = strchr(tb->ltb_text, '(');
 968
 969                 if (sep != NULL &&
 970                     bracket != NULL &&
 971                     bracket < sep) {
 972                         /* netspec lists interfaces... */
 973
 974                         offset2 = offset + (int)(bracket - tb->ltb_text);
 975                         len = strlen(bracket);
 976
 977                         bracket = strchr(bracket + 1, ')');
 978
 979                         if (bracket == NULL ||
 980                             !(bracket[1] == ',' || bracket[1] == 0)) {
 981                                 lnet_syntax("ip2nets", source, offset2, len);
 982                                 return -EINVAL;
 983                         }
 984
 985                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
 986                 }
 987
 988                 if (sep != NULL)
 989                         *sep++ = 0;
 990
 991                 net = lnet_netspec2net(tb->ltb_text);
 992                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 993                         lnet_syntax("ip2nets", source, offset,
 994                                     strlen(tb->ltb_text));
 995                         return -EINVAL;
 996                 }
 997
 998                 list_for_each(t, nets) {
 999                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1000
1001                         if (tb2 == tb)
1002                                 continue;
1003
1004                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1005                                 /* duplicate network */
1006                                 lnet_syntax("ip2nets", source, offset,
1007                                             strlen(tb->ltb_text));
1008                                 return -EINVAL;
1009                         }
1010                 }
1011
1012                 if (sep == NULL)
1013                         return 0;
1014
1015                 offset += (int)(sep - tb->ltb_text);
1016                 len = strlen(sep);
1017                 tb2 = lnet_new_text_buf(len);
1018                 if (tb2 == NULL)
1019                         return -ENOMEM;
1020
1021                 strncpy(tb2->ltb_text, sep, len);
1022                 tb2->ltb_text[len] = '\0';
1023                 list_add_tail(&tb2->ltb_list, nets);
1024
1025                 tb = tb2;
1026         }
1027 }
1028
1029 int
1030 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1031 {
1032         static char       networks[LNET_SINGLE_TEXTBUF_NOB];
1033         static char       source[LNET_SINGLE_TEXTBUF_NOB];
1034
1035         struct list_head  raw_entries;
1036         struct list_head  matched_nets;
1037         struct list_head  current_nets;
1038         struct list_head *t;
1039         struct list_head *t2;
1040         struct lnet_text_buf  *tb;
1041         struct lnet_text_buf  *tb2;
1042         __u32             net1;
1043         __u32             net2;
1044         int               len;
1045         int               count;
1046         int               dup;
1047         int               rc;
1048
1049         INIT_LIST_HEAD(&raw_entries);
1050         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1051                 CERROR("Error parsing ip2nets\n");
1052                 LASSERT (lnet_tbnob == 0);
1053                 return -EINVAL;
1054         }
1055
1056         INIT_LIST_HEAD(&matched_nets);
1057         INIT_LIST_HEAD(&current_nets);
1058         networks[0] = 0;
1059         count = 0;
1060         len = 0;
1061         rc = 0;
1062
1063         while (!list_empty(&raw_entries)) {
1064                 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1065                                 ltb_list);
1066
1067                 strncpy(source, tb->ltb_text, sizeof(source));
1068                 source[sizeof(source) - 1] = '\0';
1069
1070                 /* replace ltb_text with the network(s) add on match */
1071                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1072                 if (rc < 0)
1073                         break;
1074
1075                 list_del(&tb->ltb_list);
1076
1077                 if (rc == 0) {                  /* no match */
1078                         lnet_free_text_buf(tb);
1079                         continue;
1080                 }
1081
1082                 /* split into separate networks */
1083                 INIT_LIST_HEAD(&current_nets);
1084                 list_add(&tb->ltb_list, &current_nets);
1085                 rc = lnet_splitnets(source, &current_nets);
1086                 if (rc < 0)
1087                         break;
1088
1089                 dup = 0;
1090                 list_for_each(t, &current_nets) {
1091                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1092                         net1 = lnet_netspec2net(tb->ltb_text);
1093                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1094
1095                         list_for_each(t2, &matched_nets) {
1096                                 tb2 = list_entry(t2, struct lnet_text_buf,
1097                                                  ltb_list);
1098                                 net2 = lnet_netspec2net(tb2->ltb_text);
1099                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1100
1101                                 if (net1 == net2) {
1102                                         dup = 1;
1103                                         break;
1104                                 }
1105                         }
1106
1107                         if (dup)
1108                                 break;
1109                 }
1110
1111                 if (dup) {
1112                         lnet_free_text_bufs(&current_nets);
1113                         continue;
1114                 }
1115
1116                 list_for_each_safe(t, t2, &current_nets) {
1117                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1118
1119                         list_del(&tb->ltb_list);
1120                         list_add_tail(&tb->ltb_list, &matched_nets);
1121
1122                         len += snprintf(networks + len, sizeof(networks) - len,
1123                                         "%s%s", (len == 0) ? "" : ",",
1124                                         tb->ltb_text);
1125
1126                         if (len >= sizeof(networks)) {
1127                                 CERROR("Too many matched networks\n");
1128                                 rc = -E2BIG;
1129                                 goto out;
1130                         }
1131                 }
1132
1133                 count++;
1134         }
1135
1136  out:
1137         lnet_free_text_bufs(&raw_entries);
1138         lnet_free_text_bufs(&matched_nets);
1139         lnet_free_text_bufs(&current_nets);
1140         LASSERT (lnet_tbnob == 0);
1141
1142         if (rc < 0)
1143                 return rc;
1144
1145         *networksp = networks;
1146         return count;
1147 }
1148
1149 #ifdef __KERNEL__
1150 void
1151 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1152 {
1153         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1154 }
1155
1156 int
1157 lnet_ipaddr_enumerate (__u32 **ipaddrsp)
1158 {
1159         int        up;
1160         __u32      netmask;
1161         __u32     *ipaddrs;
1162         __u32     *ipaddrs2;
1163         int        nip;
1164         char     **ifnames;
1165         int        nif = libcfs_ipif_enumerate(&ifnames);
1166         int        i;
1167         int        rc;
1168
1169         if (nif <= 0)
1170                 return nif;
1171
1172         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1173         if (ipaddrs == NULL) {
1174                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1175                 libcfs_ipif_free_enumeration(ifnames, nif);
1176                 return -ENOMEM;
1177         }
1178
1179         for (i = nip = 0; i < nif; i++) {
1180                 if (!strcmp(ifnames[i], "lo"))
1181                         continue;
1182
1183                 rc = libcfs_ipif_query(ifnames[i], &up,
1184                                        &ipaddrs[nip], &netmask);
1185                 if (rc != 0) {
1186                         CWARN("Can't query interface %s: %d\n",
1187                               ifnames[i], rc);
1188                         continue;
1189                 }
1190
1191                 if (!up) {
1192                         CWARN("Ignoring interface %s: it's down\n",
1193                               ifnames[i]);
1194                         continue;
1195                 }
1196
1197                 nip++;
1198         }
1199
1200         libcfs_ipif_free_enumeration(ifnames, nif);
1201
1202         if (nip == nif) {
1203                 *ipaddrsp = ipaddrs;
1204         } else {
1205                 if (nip > 0) {
1206                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1207                         if (ipaddrs2 == NULL) {
1208                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1209                                 nip = -ENOMEM;
1210                         } else {
1211                                 memcpy(ipaddrs2, ipaddrs,
1212                                         nip * sizeof(*ipaddrs));
1213                                 *ipaddrsp = ipaddrs2;
1214                                 rc = nip;
1215                         }
1216                 }
1217                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1218         }
1219         return nip;
1220 }
1221
1222 int
1223 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1224 {
1225         __u32     *ipaddrs;
1226         int        nip = lnet_ipaddr_enumerate(&ipaddrs);
1227         int        rc;
1228
1229         if (nip < 0) {
1230                 LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP "
1231                                    "interfaces for ip2nets to match\n", nip);
1232                 return nip;
1233         }
1234
1235         if (nip == 0) {
1236                 LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces "
1237                                    "for ip2nets to match\n");
1238                 return -ENOENT;
1239         }
1240
1241         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1242         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1243
1244         if (rc < 0) {
1245                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1246                 return rc;
1247         }
1248
1249         if (rc == 0) {
1250                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1251                                    "any local IP interfaces\n");
1252                 return -ENOENT;
1253         }
1254
1255         return 0;
1256 }
1257
1258 int
1259 lnet_set_ip_niaddr (lnet_ni_t *ni)
1260 {
1261         __u32  net = LNET_NIDNET(ni->ni_nid);
1262         char **names;
1263         int    n;
1264         __u32  ip;
1265         __u32  netmask;
1266         int    up;
1267         int    i;
1268         int    rc;
1269
1270         /* Convenience for LNDs that use the IP address of a local interface as
1271          * the local address part of their NID */
1272
1273         if (ni->ni_interfaces[0] != NULL) {
1274
1275                 CLASSERT (LNET_MAX_INTERFACES > 1);
1276
1277                 if (ni->ni_interfaces[1] != NULL) {
1278                         CERROR("Net %s doesn't support multiple interfaces\n",
1279                                libcfs_net2str(net));
1280                         return -EPERM;
1281                 }
1282
1283                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1284                                        &up, &ip, &netmask);
1285                 if (rc != 0) {
1286                         CERROR("Net %s can't query interface %s: %d\n",
1287                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1288                         return -EPERM;
1289                 }
1290
1291                 if (!up) {
1292                         CERROR("Net %s can't use interface %s: it's down\n",
1293                                libcfs_net2str(net), ni->ni_interfaces[0]);
1294                         return -ENETDOWN;
1295                 }
1296
1297                 ni->ni_nid = LNET_MKNID(net, ip);
1298                 return 0;
1299         }
1300
1301         n = libcfs_ipif_enumerate(&names);
1302         if (n <= 0) {
1303                 CERROR("Net %s can't enumerate interfaces: %d\n",
1304                        libcfs_net2str(net), n);
1305                 return 0;
1306         }
1307
1308         for (i = 0; i < n; i++) {
1309                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1310                         continue;
1311
1312                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1313
1314                 if (rc != 0) {
1315                         CWARN("Net %s can't query interface %s: %d\n",
1316                               libcfs_net2str(net), names[i], rc);
1317                         continue;
1318                 }
1319
1320                 if (!up) {
1321                         CWARN("Net %s ignoring interface %s (down)\n",
1322                               libcfs_net2str(net), names[i]);
1323                         continue;
1324                 }
1325
1326                 libcfs_ipif_free_enumeration(names, n);
1327                 ni->ni_nid = LNET_MKNID(net, ip);
1328                 return 0;
1329         }
1330
1331         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1332         libcfs_ipif_free_enumeration(names, n);
1333         return -ENOENT;
1334 }
1335 EXPORT_SYMBOL(lnet_set_ip_niaddr);
1336
1337 #endif