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;
 201         char            *tokens;
 202         char            *str;
 203         char            *tmp;
 204         struct lnet_ni  *ni;
 205         __u32           net;
 206         int             nnets = 0;
 207
 208         if (networks == NULL) {
 209                 CERROR("networks string is undefined\n");
 210                 return -EINVAL;
 211         }
 212
 213         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 214                 /* _WAY_ conservative */
 215                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 216                                    "long\n");
 217                 return -EINVAL;
 218         }
 219
 220         tokensize = strlen(networks) + 1;
 221
 222         LIBCFS_ALLOC(tokens, tokensize);
 223         if (tokens == NULL) {
 224                 CERROR("Can't allocate net tokens\n");
 225                 return -ENOMEM;
 226         }
 227
 228         memcpy(tokens, networks, tokensize);
 229         str = tmp = tokens;
 230
 231         /* Add in the loopback network */
 232         ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist);
 233         if (ni == NULL)
 234                 goto failed;
 235
 236         while (str != NULL && *str != 0) {
 237                 char    *comma = strchr(str, ',');
 238                 char    *bracket = strchr(str, '(');
 239                 char    *square = strchr(str, '[');
 240                 char    *iface;
 241                 int     niface;
 242                 int     rc;
 243
 244                 /* NB we don't check interface conflicts here; it's the LNDs
 245                  * responsibility (if it cares at all) */
 246
 247                 if (square != NULL && (comma == NULL || square < comma)) {
 248                         /* i.e: o2ib0(ib0)[1,2], number between square
 249                          * brackets are CPTs this NI needs to be bond */
 250                         if (bracket != NULL && bracket > square) {
 251                                 tmp = square;
 252                                 goto failed_syntax;
 253                         }
 254
 255                         tmp = strchr(square, ']');
 256                         if (tmp == NULL) {
 257                                 tmp = square;
 258                                 goto failed_syntax;
 259                         }
 260
 261                         rc = cfs_expr_list_parse(square, tmp - square + 1,
 262                                                  0, LNET_CPT_NUMBER - 1, &el);
 263                         if (rc != 0) {
 264                                 tmp = square;
 265                                 goto failed_syntax;
 266                         }
 267
 268                         while (square <= tmp)
 269                                 *square++ = ' ';
 270                 }
 271
 272                 if (bracket == NULL ||
 273                     (comma != NULL && comma < bracket)) {
 274
 275                         /* no interface list specified */
 276
 277                         if (comma != NULL)
 278                                 *comma++ = 0;
 279                         net = libcfs_str2net(cfs_trimwhite(str));
 280
 281                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 282                                 LCONSOLE_ERROR_MSG(0x113, "Unrecognised network"
 283                                                    " type\n");
 284                                 tmp = str;
 285                                 goto failed_syntax;
 286                         }
 287
 288                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 289                             lnet_ni_alloc(net, el, nilist) == NULL)
 290                                 goto failed;
 291
 292                         if (el != NULL) {
 293                                 cfs_expr_list_free(el);
 294                                 el = NULL;
 295                         }
 296
 297                         str = comma;
 298                         continue;
 299                 }
 300
 301                 *bracket = 0;
 302                 net = libcfs_str2net(cfs_trimwhite(str));
 303                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 304                         tmp = str;
 305                         goto failed_syntax;
 306                 }
 307
 308                 nnets++;
 309                 ni = lnet_ni_alloc(net, el, nilist);
 310                 if (ni == NULL)
 311                         goto failed;
 312
 313                 if (el != NULL) {
 314                         cfs_expr_list_free(el);
 315                         el = NULL;
 316                 }
 317
 318                 niface = 0;
 319                 iface = bracket + 1;
 320
 321                 bracket = strchr(iface, ')');
 322                 if (bracket == NULL) {
 323                         tmp = iface;
 324                         goto failed_syntax;
 325                 }
 326
 327                 *bracket = 0;
 328                 do {
 329                         comma = strchr(iface, ',');
 330                         if (comma != NULL)
 331                                 *comma++ = 0;
 332
 333                         iface = cfs_trimwhite(iface);
 334                         if (*iface == 0) {
 335                                 tmp = iface;
 336                                 goto failed_syntax;
 337                         }
 338
 339                         if (niface == LNET_MAX_INTERFACES) {
 340                                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 341                                                    "for net %s\n",
 342                                                    libcfs_net2str(net));
 343                                 goto failed;
 344                         }
 345
 346                         /* Allocate a seperate piece of memory and copy
 347                          * into it the string, so we don't have
 348                          * a depencency on the tokens string.  This way we
 349                          * can free the tokens at the end of the function.
 350                          * The newly allocated ni_interfaces[] can be
 351                          * freed when freeing the NI */
 352                         LIBCFS_ALLOC(ni->ni_interfaces[niface],
 353                                      strlen(iface) + 1);
 354                         if (ni->ni_interfaces[niface] == NULL) {
 355                                 CERROR("Can't allocate net interface name\n");
 356                                 goto failed;
 357                         }
 358                         strncpy(ni->ni_interfaces[niface], iface,
 359                                 strlen(iface));
 360                         niface++;
 361                         iface = comma;
 362                 } while (iface != NULL);
 363
 364                 str = bracket + 1;
 365                 comma = strchr(bracket + 1, ',');
 366                 if (comma != NULL) {
 367                         *comma = 0;
 368                         str = cfs_trimwhite(str);
 369                         if (*str != 0) {
 370                                 tmp = str;
 371                                 goto failed_syntax;
 372                         }
 373                         str = comma + 1;
 374                         continue;
 375                 }
 376
 377                 str = cfs_trimwhite(str);
 378                 if (*str != 0) {
 379                         tmp = str;
 380                         goto failed_syntax;
 381                 }
 382         }
 383
 384         LASSERT(!list_empty(nilist));
 385
 386         LIBCFS_FREE(tokens, tokensize);
 387         return nnets;
 388
 389  failed_syntax:
 390         lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
 391  failed:
 392         while (!list_empty(nilist)) {
 393                 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
 394
 395                 list_del(&ni->ni_list);
 396                 lnet_ni_free(ni);
 397         }
 398
 399         if (el != NULL)
 400                 cfs_expr_list_free(el);
 401
 402         LIBCFS_FREE(tokens, tokensize);
 403
 404         return -EINVAL;
 405 }
 406
 407 struct lnet_text_buf *lnet_new_text_buf(int str_len)
 408 {
 409         struct lnet_text_buf *ltb;
 410         int nob;
 411
 412         /* NB allocate space for the terminating 0 */
 413         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 414         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 415                 /* _way_ conservative for "route net gateway..." */
 416                 CERROR("text buffer too big\n");
 417                 return NULL;
 418         }
 419
 420         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 421                 CERROR("Too many text buffers\n");
 422                 return NULL;
 423         }
 424
 425         LIBCFS_ALLOC(ltb, nob);
 426         if (ltb == NULL)
 427                 return NULL;
 428
 429         ltb->ltb_size = nob;
 430         ltb->ltb_text[0] = 0;
 431         lnet_tbnob += nob;
 432         return ltb;
 433 }
 434
 435 void
 436 lnet_free_text_buf(struct lnet_text_buf *ltb)
 437 {
 438         lnet_tbnob -= ltb->ltb_size;
 439         LIBCFS_FREE(ltb, ltb->ltb_size);
 440 }
 441
 442 void
 443 lnet_free_text_bufs(struct list_head *tbs)
 444 {
 445         struct lnet_text_buf  *ltb;
 446
 447         while (!list_empty(tbs)) {
 448                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 449
 450                 list_del(&ltb->ltb_list);
 451                 lnet_free_text_buf(ltb);
 452         }
 453 }
 454
 455 void
 456 lnet_print_text_bufs(struct list_head *tbs)
 457 {
 458         struct list_head *tmp;
 459         struct lnet_text_buf  *ltb;
 460
 461         list_for_each(tmp, tbs) {
 462                 ltb = list_entry(tmp, struct lnet_text_buf, ltb_list);
 463
 464                 CDEBUG(D_WARNING, "%s\n", ltb->ltb_text);
 465         }
 466
 467         CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob);
 468 }
 469
 470 int
 471 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 472 {
 473         struct list_head  pending;
 474         char             *sep;
 475         int               nob;
 476         int               i;
 477         struct lnet_text_buf  *ltb;
 478
 479         INIT_LIST_HEAD(&pending);
 480
 481         /* Split 'str' into separate commands */
 482         for (;;) {
 483                 /* skip leading whitespace */
 484                 while (cfs_iswhite(*str))
 485                         str++;
 486
 487                 /* scan for separator or comment */
 488                 for (sep = str; *sep != 0; sep++)
 489                         if (lnet_issep(*sep) || *sep == '#')
 490                                 break;
 491
 492                 nob = (int)(sep - str);
 493                 if (nob > 0) {
 494                         ltb = lnet_new_text_buf(nob);
 495                         if (ltb == NULL) {
 496                                 lnet_free_text_bufs(&pending);
 497                                 return -1;
 498                         }
 499
 500                         for (i = 0; i < nob; i++)
 501                                 if (cfs_iswhite(str[i]))
 502                                         ltb->ltb_text[i] = ' ';
 503                                 else
 504                                         ltb->ltb_text[i] = str[i];
 505
 506                         ltb->ltb_text[nob] = 0;
 507
 508                         list_add_tail(&ltb->ltb_list, &pending);
 509                 }
 510
 511                 if (*sep == '#') {
 512                         /* scan for separator */
 513                         do {
 514                                 sep++;
 515                         } while (*sep != 0 && !lnet_issep(*sep));
 516                 }
 517
 518                 if (*sep == 0)
 519                         break;
 520
 521                 str = sep + 1;
 522         }
 523
 524         list_splice(&pending, tbs->prev);
 525         return 0;
 526 }
 527
 528 int
 529 lnet_expand1tb(struct list_head *list,
 530                char *str, char *sep1, char *sep2,
 531                char *item, int itemlen)
 532 {
 533         int              len1 = (int)(sep1 - str);
 534         int              len2 = strlen(sep2 + 1);
 535         struct lnet_text_buf *ltb;
 536
 537         LASSERT (*sep1 == '[');
 538         LASSERT (*sep2 == ']');
 539
 540         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 541         if (ltb == NULL)
 542                 return -ENOMEM;
 543
 544         memcpy(ltb->ltb_text, str, len1);
 545         memcpy(&ltb->ltb_text[len1], item, itemlen);
 546         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 547         ltb->ltb_text[len1 + itemlen + len2] = 0;
 548
 549         list_add_tail(&ltb->ltb_list, list);
 550         return 0;
 551 }
 552
 553 int
 554 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 555 {
 556         char              num[16];
 557         struct list_head  pending;
 558         char             *sep;
 559         char             *sep2;
 560         char             *parsed;
 561         char             *enditem;
 562         int               lo;
 563         int               hi;
 564         int               stride;
 565         int               i;
 566         int               nob;
 567         int               scanned;
 568
 569         INIT_LIST_HEAD(&pending);
 570
 571         sep = strchr(str, '[');
 572         if (sep == NULL)                        /* nothing to expand */
 573                 return 0;
 574
 575         sep2 = strchr(sep, ']');
 576         if (sep2 == NULL)
 577                 goto failed;
 578
 579         for (parsed = sep; parsed < sep2; parsed = enditem) {
 580
 581                 enditem = ++parsed;
 582                 while (enditem < sep2 && *enditem != ',')
 583                         enditem++;
 584
 585                 if (enditem == parsed)          /* no empty items */
 586                         goto failed;
 587
 588                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
 589
 590                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 591
 592                                 /* simple string enumeration */
 593                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 594                                                    parsed, (int)(enditem - parsed)) != 0)
 595                                         goto failed;
 596
 597                                 continue;
 598                         }
 599
 600                         stride = 1;
 601                 }
 602
 603                 /* range expansion */
 604
 605                 if (enditem != parsed + scanned) /* no trailing junk */
 606                         goto failed;
 607
 608                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 609                     (hi - lo) % stride != 0)
 610                         goto failed;
 611
 612                 for (i = lo; i <= hi; i += stride) {
 613
 614                         snprintf(num, sizeof(num), "%d", i);
 615                         nob = strlen(num);
 616                         if (nob + 1 == sizeof(num))
 617                                 goto failed;
 618
 619                         if (lnet_expand1tb(&pending, str, sep, sep2,
 620                                            num, nob) != 0)
 621                                 goto failed;
 622                 }
 623         }
 624
 625         list_splice(&pending, tbs->prev);
 626         return 1;
 627
 628  failed:
 629         lnet_free_text_bufs(&pending);
 630         return -1;
 631 }
 632
 633 int
 634 lnet_parse_hops (char *str, unsigned int *hops)
 635 {
 636         int     len = strlen(str);
 637         int     nob = len;
 638
 639         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 640                 nob == len &&
 641                 *hops > 0 && *hops < 256);
 642 }
 643
 644 #define LNET_PRIORITY_SEPARATOR (':')
 645
 646 int
 647 lnet_parse_priority(char *str, unsigned int *priority, char **token)
 648 {
 649         int   nob;
 650         char *sep;
 651         int   len;
 652
 653         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
 654         if (sep == NULL) {
 655                 *priority = 0;
 656                 return 0;
 657         }
 658         len = strlen(sep + 1);
 659
 660         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
 661                 /* Update the caller's token pointer so it treats the found
 662                    priority as the token to report in the error message. */
 663                 *token += sep - str + 1;
 664                 return -1;
 665         }
 666
 667         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
 668
 669         /*
 670          * Change priority separator to \0 to be able to parse NID
 671          */
 672         *sep = '\0';
 673         return 0;
 674 }
 675
 676 int
 677 lnet_parse_route (char *str, int *im_a_router)
 678 {
 679         /* static scratch buffer OK (single threaded) */
 680         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 681
 682         struct list_head  nets;
 683         struct list_head  gateways;
 684         struct list_head *tmp1;
 685         struct list_head *tmp2;
 686         __u32             net;
 687         lnet_nid_t        nid;
 688         struct lnet_text_buf  *ltb;
 689         int               rc;
 690         char             *sep;
 691         char             *token = str;
 692         int               ntokens = 0;
 693         int               myrc = -1;
 694         unsigned int      hops;
 695         int               got_hops = 0;
 696         unsigned int      priority = 0;
 697
 698         INIT_LIST_HEAD(&gateways);
 699         INIT_LIST_HEAD(&nets);
 700
 701         /* save a copy of the string for error messages */
 702         strncpy(cmd, str, sizeof(cmd));
 703         cmd[sizeof(cmd) - 1] = '\0';
 704
 705         sep = str;
 706         for (;;) {
 707                 /* scan for token start */
 708                 while (cfs_iswhite(*sep))
 709                         sep++;
 710                 if (*sep == 0) {
 711                         if (ntokens < (got_hops ? 3 : 2))
 712                                 goto token_error;
 713                         break;
 714                 }
 715
 716                 ntokens++;
 717                 token = sep++;
 718
 719                 /* scan for token end */
 720                 while (*sep != 0 && !cfs_iswhite(*sep))
 721                         sep++;
 722                 if (*sep != 0)
 723                         *sep++ = 0;
 724
 725                 if (ntokens == 1) {
 726                         tmp2 = &nets;           /* expanding nets */
 727                 } else if (ntokens == 2 &&
 728                            lnet_parse_hops(token, &hops)) {
 729                         got_hops = 1;           /* got a hop count */
 730                         continue;
 731                 } else {
 732                         tmp2 = &gateways;       /* expanding gateways */
 733                 }
 734
 735                 ltb = lnet_new_text_buf(strlen(token));
 736                 if (ltb == NULL)
 737                         goto out;
 738
 739                 strcpy(ltb->ltb_text, token);
 740                 tmp1 = &ltb->ltb_list;
 741                 list_add_tail(tmp1, tmp2);
 742
 743                 while (tmp1 != tmp2) {
 744                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 745
 746                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 747                         if (rc < 0)
 748                                 goto token_error;
 749
 750                         tmp1 = tmp1->next;
 751
 752                         if (rc > 0) {           /* expanded! */
 753                                 list_del(&ltb->ltb_list);
 754                                 lnet_free_text_buf(ltb);
 755                                 continue;
 756                         }
 757
 758                         if (ntokens == 1) {
 759                                 net = libcfs_str2net(ltb->ltb_text);
 760                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 761                                     LNET_NETTYP(net) == LOLND)
 762                                         goto token_error;
 763                         } else {
 764                                 rc = lnet_parse_priority(ltb->ltb_text,
 765                                                          &priority, &token);
 766                                 if (rc < 0)
 767                                         goto token_error;
 768
 769                                 nid = libcfs_str2nid(ltb->ltb_text);
 770                                 if (nid == LNET_NID_ANY ||
 771                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 772                                         goto token_error;
 773                         }
 774                 }
 775         }
 776
 777         if (!got_hops)
 778                 hops = 1;
 779
 780         LASSERT(!list_empty(&nets));
 781         LASSERT(!list_empty(&gateways));
 782
 783         list_for_each(tmp1, &nets) {
 784                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 785                 net = libcfs_str2net(ltb->ltb_text);
 786                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
 787
 788                 list_for_each(tmp2, &gateways) {
 789                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
 790                         nid = libcfs_str2nid(ltb->ltb_text);
 791                         LASSERT(nid != LNET_NID_ANY);
 792
 793                         if (lnet_islocalnid(nid)) {
 794                                 *im_a_router = 1;
 795                                 continue;
 796                         }
 797
 798                         rc = lnet_add_route(net, hops, nid, priority);
 799                         if (rc != 0) {
 800                                 CERROR("Can't create route "
 801                                        "to %s via %s\n",
 802                                        libcfs_net2str(net),
 803                                        libcfs_nid2str(nid));
 804                                 goto out;
 805                         }
 806                 }
 807         }
 808
 809         myrc = 0;
 810         goto out;
 811
 812 token_error:
 813         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 814 out:
 815         lnet_free_text_bufs(&nets);
 816         lnet_free_text_bufs(&gateways);
 817         return myrc;
 818 }
 819
 820 int
 821 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 822 {
 823         struct lnet_text_buf   *ltb;
 824
 825         while (!list_empty(tbs)) {
 826                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 827
 828                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 829                         lnet_free_text_bufs(tbs);
 830                         return -EINVAL;
 831                 }
 832
 833                 list_del(&ltb->ltb_list);
 834                 lnet_free_text_buf(ltb);
 835         }
 836
 837         return 0;
 838 }
 839
 840 int
 841 lnet_parse_routes (char *routes, int *im_a_router)
 842 {
 843         struct list_head tbs;
 844         int              rc = 0;
 845
 846         *im_a_router = 0;
 847
 848         INIT_LIST_HEAD(&tbs);
 849
 850         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 851                 CERROR("Error parsing routes\n");
 852                 rc = -EINVAL;
 853         } else {
 854                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 855         }
 856
 857         LASSERT (lnet_tbnob == 0);
 858         return rc;
 859 }
 860
 861 int
 862 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 863 {
 864         struct list_head list = LIST_HEAD_INIT(list);
 865         int             rc;
 866         int             i;
 867
 868         rc = cfs_ip_addr_parse(token, len, &list);
 869         if (rc != 0)
 870                 return rc;
 871
 872         for (rc = i = 0; !rc && i < nip; i++)
 873                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 874
 875         cfs_ip_addr_free(&list);
 876
 877         return rc;
 878 }
 879
 880 int
 881 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 882 {
 883         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 884
 885         int   matched = 0;
 886         int   ntokens = 0;
 887         int   len;
 888         char *net = NULL;
 889         char *sep;
 890         char *token;
 891         int   rc;
 892
 893         LASSERT (strlen(net_entry) < sizeof(tokens));
 894
 895         /* work on a copy of the string */
 896         strcpy(tokens, net_entry);
 897         sep = tokens;
 898         for (;;) {
 899                 /* scan for token start */
 900                 while (cfs_iswhite(*sep))
 901                         sep++;
 902                 if (*sep == 0)
 903                         break;
 904
 905                 token = sep++;
 906
 907                 /* scan for token end */
 908                 while (*sep != 0 && !cfs_iswhite(*sep))
 909                         sep++;
 910                 if (*sep != 0)
 911                         *sep++ = 0;
 912
 913                 if (ntokens++ == 0) {
 914                         net = token;
 915                         continue;
 916                 }
 917
 918                 len = strlen(token);
 919
 920                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 921                 if (rc < 0) {
 922                         lnet_syntax("ip2nets", net_entry,
 923                                     (int)(token - tokens), len);
 924                         return rc;
 925                 }
 926
 927                 matched |= (rc != 0);
 928         }
 929
 930         if (!matched)
 931                 return 0;
 932
 933         strcpy(net_entry, net);                 /* replace with matched net */
 934         return 1;
 935 }
 936
 937 __u32
 938 lnet_netspec2net(char *netspec)
 939 {
 940         char   *bracket = strchr(netspec, '(');
 941         __u32   net;
 942
 943         if (bracket != NULL)
 944                 *bracket = 0;
 945
 946         net = libcfs_str2net(netspec);
 947
 948         if (bracket != NULL)
 949                 *bracket = '(';
 950
 951         return net;
 952 }
 953
 954 int
 955 lnet_splitnets(char *source, struct list_head *nets)
 956 {
 957         int               offset = 0;
 958         int               offset2;
 959         int               len;
 960         struct lnet_text_buf  *tb;
 961         struct lnet_text_buf  *tb2;
 962         struct list_head *t;
 963         char             *sep;
 964         char             *bracket;
 965         __u32             net;
 966
 967         LASSERT(!list_empty(nets));
 968         LASSERT(nets->next == nets->prev);      /* single entry */
 969
 970         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
 971
 972         for (;;) {
 973                 sep = strchr(tb->ltb_text, ',');
 974                 bracket = strchr(tb->ltb_text, '(');
 975
 976                 if (sep != NULL &&
 977                     bracket != NULL &&
 978                     bracket < sep) {
 979                         /* netspec lists interfaces... */
 980
 981                         offset2 = offset + (int)(bracket - tb->ltb_text);
 982                         len = strlen(bracket);
 983
 984                         bracket = strchr(bracket + 1, ')');
 985
 986                         if (bracket == NULL ||
 987                             !(bracket[1] == ',' || bracket[1] == 0)) {
 988                                 lnet_syntax("ip2nets", source, offset2, len);
 989                                 return -EINVAL;
 990                         }
 991
 992                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
 993                 }
 994
 995                 if (sep != NULL)
 996                         *sep++ = 0;
 997
 998                 net = lnet_netspec2net(tb->ltb_text);
 999                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
1000                         lnet_syntax("ip2nets", source, offset,
1001                                     strlen(tb->ltb_text));
1002                         return -EINVAL;
1003                 }
1004
1005                 list_for_each(t, nets) {
1006                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1007
1008                         if (tb2 == tb)
1009                                 continue;
1010
1011                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1012                                 /* duplicate network */
1013                                 lnet_syntax("ip2nets", source, offset,
1014                                             strlen(tb->ltb_text));
1015                                 return -EINVAL;
1016                         }
1017                 }
1018
1019                 if (sep == NULL)
1020                         return 0;
1021
1022                 offset += (int)(sep - tb->ltb_text);
1023                 len = strlen(sep);
1024                 tb2 = lnet_new_text_buf(len);
1025                 if (tb2 == NULL)
1026                         return -ENOMEM;
1027
1028                 strncpy(tb2->ltb_text, sep, len);
1029                 tb2->ltb_text[len] = '\0';
1030                 list_add_tail(&tb2->ltb_list, nets);
1031
1032                 tb = tb2;
1033         }
1034 }
1035
1036 int
1037 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1038 {
1039         static char       networks[LNET_SINGLE_TEXTBUF_NOB];
1040         static char       source[LNET_SINGLE_TEXTBUF_NOB];
1041
1042         struct list_head  raw_entries;
1043         struct list_head  matched_nets;
1044         struct list_head  current_nets;
1045         struct list_head *t;
1046         struct list_head *t2;
1047         struct lnet_text_buf  *tb;
1048         struct lnet_text_buf  *tb2;
1049         __u32             net1;
1050         __u32             net2;
1051         int               len;
1052         int               count;
1053         int               dup;
1054         int               rc;
1055
1056         INIT_LIST_HEAD(&raw_entries);
1057         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1058                 CERROR("Error parsing ip2nets\n");
1059                 LASSERT (lnet_tbnob == 0);
1060                 return -EINVAL;
1061         }
1062
1063         INIT_LIST_HEAD(&matched_nets);
1064         INIT_LIST_HEAD(&current_nets);
1065         networks[0] = 0;
1066         count = 0;
1067         len = 0;
1068         rc = 0;
1069
1070         while (!list_empty(&raw_entries)) {
1071                 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1072                                 ltb_list);
1073
1074                 strncpy(source, tb->ltb_text, sizeof(source));
1075                 source[sizeof(source) - 1] = '\0';
1076
1077                 /* replace ltb_text with the network(s) add on match */
1078                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1079                 if (rc < 0)
1080                         break;
1081
1082                 list_del(&tb->ltb_list);
1083
1084                 if (rc == 0) {                  /* no match */
1085                         lnet_free_text_buf(tb);
1086                         continue;
1087                 }
1088
1089                 /* split into separate networks */
1090                 INIT_LIST_HEAD(&current_nets);
1091                 list_add(&tb->ltb_list, &current_nets);
1092                 rc = lnet_splitnets(source, &current_nets);
1093                 if (rc < 0)
1094                         break;
1095
1096                 dup = 0;
1097                 list_for_each(t, &current_nets) {
1098                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1099                         net1 = lnet_netspec2net(tb->ltb_text);
1100                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1101
1102                         list_for_each(t2, &matched_nets) {
1103                                 tb2 = list_entry(t2, struct lnet_text_buf,
1104                                                  ltb_list);
1105                                 net2 = lnet_netspec2net(tb2->ltb_text);
1106                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1107
1108                                 if (net1 == net2) {
1109                                         dup = 1;
1110                                         break;
1111                                 }
1112                         }
1113
1114                         if (dup)
1115                                 break;
1116                 }
1117
1118                 if (dup) {
1119                         lnet_free_text_bufs(&current_nets);
1120                         continue;
1121                 }
1122
1123                 list_for_each_safe(t, t2, &current_nets) {
1124                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1125
1126                         list_del(&tb->ltb_list);
1127                         list_add_tail(&tb->ltb_list, &matched_nets);
1128
1129                         len += snprintf(networks + len, sizeof(networks) - len,
1130                                         "%s%s", (len == 0) ? "" : ",",
1131                                         tb->ltb_text);
1132
1133                         if (len >= sizeof(networks)) {
1134                                 CERROR("Too many matched networks\n");
1135                                 rc = -E2BIG;
1136                                 goto out;
1137                         }
1138                 }
1139
1140                 count++;
1141         }
1142
1143  out:
1144         lnet_free_text_bufs(&raw_entries);
1145         lnet_free_text_bufs(&matched_nets);
1146         lnet_free_text_bufs(&current_nets);
1147         LASSERT (lnet_tbnob == 0);
1148
1149         if (rc < 0)
1150                 return rc;
1151
1152         *networksp = networks;
1153         return count;
1154 }
1155
1156 #ifdef __KERNEL__
1157 void
1158 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1159 {
1160         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1161 }
1162
1163 int
1164 lnet_ipaddr_enumerate (__u32 **ipaddrsp)
1165 {
1166         int        up;
1167         __u32      netmask;
1168         __u32     *ipaddrs;
1169         __u32     *ipaddrs2;
1170         int        nip;
1171         char     **ifnames;
1172         int        nif = libcfs_ipif_enumerate(&ifnames);
1173         int        i;
1174         int        rc;
1175
1176         if (nif <= 0)
1177                 return nif;
1178
1179         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1180         if (ipaddrs == NULL) {
1181                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1182                 libcfs_ipif_free_enumeration(ifnames, nif);
1183                 return -ENOMEM;
1184         }
1185
1186         for (i = nip = 0; i < nif; i++) {
1187                 if (!strcmp(ifnames[i], "lo"))
1188                         continue;
1189
1190                 rc = libcfs_ipif_query(ifnames[i], &up,
1191                                        &ipaddrs[nip], &netmask);
1192                 if (rc != 0) {
1193                         CWARN("Can't query interface %s: %d\n",
1194                               ifnames[i], rc);
1195                         continue;
1196                 }
1197
1198                 if (!up) {
1199                         CWARN("Ignoring interface %s: it's down\n",
1200                               ifnames[i]);
1201                         continue;
1202                 }
1203
1204                 nip++;
1205         }
1206
1207         libcfs_ipif_free_enumeration(ifnames, nif);
1208
1209         if (nip == nif) {
1210                 *ipaddrsp = ipaddrs;
1211         } else {
1212                 if (nip > 0) {
1213                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1214                         if (ipaddrs2 == NULL) {
1215                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1216                                 nip = -ENOMEM;
1217                         } else {
1218                                 memcpy(ipaddrs2, ipaddrs,
1219                                         nip * sizeof(*ipaddrs));
1220                                 *ipaddrsp = ipaddrs2;
1221                                 rc = nip;
1222                         }
1223                 }
1224                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1225         }
1226         return nip;
1227 }
1228
1229 int
1230 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1231 {
1232         __u32     *ipaddrs;
1233         int        nip = lnet_ipaddr_enumerate(&ipaddrs);
1234         int        rc;
1235
1236         if (nip < 0) {
1237                 LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP "
1238                                    "interfaces for ip2nets to match\n", nip);
1239                 return nip;
1240         }
1241
1242         if (nip == 0) {
1243                 LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces "
1244                                    "for ip2nets to match\n");
1245                 return -ENOENT;
1246         }
1247
1248         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1249         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1250
1251         if (rc < 0) {
1252                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1253                 return rc;
1254         }
1255
1256         if (rc == 0) {
1257                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1258                                    "any local IP interfaces\n");
1259                 return -ENOENT;
1260         }
1261
1262         return 0;
1263 }
1264
1265 int
1266 lnet_set_ip_niaddr (lnet_ni_t *ni)
1267 {
1268         __u32  net = LNET_NIDNET(ni->ni_nid);
1269         char **names;
1270         int    n;
1271         __u32  ip;
1272         __u32  netmask;
1273         int    up;
1274         int    i;
1275         int    rc;
1276
1277         /* Convenience for LNDs that use the IP address of a local interface as
1278          * the local address part of their NID */
1279
1280         if (ni->ni_interfaces[0] != NULL) {
1281
1282                 CLASSERT (LNET_MAX_INTERFACES > 1);
1283
1284                 if (ni->ni_interfaces[1] != NULL) {
1285                         CERROR("Net %s doesn't support multiple interfaces\n",
1286                                libcfs_net2str(net));
1287                         return -EPERM;
1288                 }
1289
1290                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1291                                        &up, &ip, &netmask);
1292                 if (rc != 0) {
1293                         CERROR("Net %s can't query interface %s: %d\n",
1294                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1295                         return -EPERM;
1296                 }
1297
1298                 if (!up) {
1299                         CERROR("Net %s can't use interface %s: it's down\n",
1300                                libcfs_net2str(net), ni->ni_interfaces[0]);
1301                         return -ENETDOWN;
1302                 }
1303
1304                 ni->ni_nid = LNET_MKNID(net, ip);
1305                 return 0;
1306         }
1307
1308         n = libcfs_ipif_enumerate(&names);
1309         if (n <= 0) {
1310                 CERROR("Net %s can't enumerate interfaces: %d\n",
1311                        libcfs_net2str(net), n);
1312                 return 0;
1313         }
1314
1315         for (i = 0; i < n; i++) {
1316                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1317                         continue;
1318
1319                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1320
1321                 if (rc != 0) {
1322                         CWARN("Net %s can't query interface %s: %d\n",
1323                               libcfs_net2str(net), names[i], rc);
1324                         continue;
1325                 }
1326
1327                 if (!up) {
1328                         CWARN("Net %s ignoring interface %s (down)\n",
1329                               libcfs_net2str(net), names[i]);
1330                         continue;
1331                 }
1332
1333                 libcfs_ipif_free_enumeration(names, n);
1334                 ni->ni_nid = LNET_MKNID(net, ip);
1335                 return 0;
1336         }
1337
1338         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1339         libcfs_ipif_free_enumeration(names, n);
1340         return -ENOENT;
1341 }
1342 EXPORT_SYMBOL(lnet_set_ip_niaddr);
1343
1344 #endif