drivers/staging/lustre/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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_LNET
  34 #include <linux/nsproxy.h>
  35 #include <net/net_namespace.h>
  36 #include "../../include/linux/lnet/lib-lnet.h"
  37
  38 struct lnet_text_buf {      /* tmp struct for parsing routes */
  39         struct list_head ltb_list;      /* stash on lists */
  40         int ltb_size;   /* allocated size */
  41         char ltb_text[0];     /* text buffer */
  42 };
  43
  44 static int lnet_tbnob;                  /* track text buf allocation */
  45 #define LNET_MAX_TEXTBUF_NOB     (64 << 10)     /* bound allocation */
  46 #define LNET_SINGLE_TEXTBUF_NOB  (4 << 10)
  47
  48 static void
  49 lnet_syntax(char *name, char *str, int offset, int width)
  50 {
  51         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  52         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  53
  54         memset(dots, '.', sizeof(dots));
  55         dots[sizeof(dots) - 1] = 0;
  56         memset(dashes, '-', sizeof(dashes));
  57         dashes[sizeof(dashes) - 1] = 0;
  58
  59         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  60         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  61                            (int)strlen(name), dots, offset, dots,
  62                             (width < 1) ? 0 : width - 1, dashes);
  63 }
  64
  65 static int
  66 lnet_issep(char c)
  67 {
  68         switch (c) {
  69         case '\n':
  70         case '\r':
  71         case ';':
  72                 return 1;
  73         default:
  74                 return 0;
  75         }
  76 }
  77
  78 int
  79 lnet_net_unique(__u32 net, struct list_head *nilist)
  80 {
  81         struct list_head *tmp;
  82         lnet_ni_t *ni;
  83
  84         list_for_each(tmp, nilist) {
  85                 ni = list_entry(tmp, lnet_ni_t, ni_list);
  86
  87                 if (LNET_NIDNET(ni->ni_nid) == net)
  88                         return 0;
  89         }
  90
  91         return 1;
  92 }
  93
  94 void
  95 lnet_ni_free(struct lnet_ni *ni)
  96 {
  97         int i;
  98
  99         if (ni->ni_refs)
 100                 cfs_percpt_free(ni->ni_refs);
 101
 102         if (ni->ni_tx_queues)
 103                 cfs_percpt_free(ni->ni_tx_queues);
 104
 105         if (ni->ni_cpts)
 106                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 107
 108         if (ni->ni_lnd_tunables)
 109                 LIBCFS_FREE(ni->ni_lnd_tunables, sizeof(*ni->ni_lnd_tunables));
 110
 111         for (i = 0; i < LNET_MAX_INTERFACES && ni->ni_interfaces[i]; i++) {
 112                 LIBCFS_FREE(ni->ni_interfaces[i],
 113                             strlen(ni->ni_interfaces[i]) + 1);
 114         }
 115
 116         /* release reference to net namespace */
 117         if (ni->ni_net_ns)
 118                 put_net(ni->ni_net_ns);
 119
 120         LIBCFS_FREE(ni, sizeof(*ni));
 121 }
 122
 123 lnet_ni_t *
 124 lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, struct list_head *nilist)
 125 {
 126         struct lnet_tx_queue *tq;
 127         struct lnet_ni *ni;
 128         int rc;
 129         int i;
 130
 131         if (!lnet_net_unique(net, nilist)) {
 132                 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
 133                                    libcfs_net2str(net));
 134                 return NULL;
 135         }
 136
 137         LIBCFS_ALLOC(ni, sizeof(*ni));
 138         if (!ni) {
 139                 CERROR("Out of memory creating network %s\n",
 140                        libcfs_net2str(net));
 141                 return NULL;
 142         }
 143
 144         spin_lock_init(&ni->ni_lock);
 145         INIT_LIST_HEAD(&ni->ni_cptlist);
 146         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 147                                        sizeof(*ni->ni_refs[0]));
 148         if (!ni->ni_refs)
 149                 goto failed;
 150
 151         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 152                                             sizeof(*ni->ni_tx_queues[0]));
 153         if (!ni->ni_tx_queues)
 154                 goto failed;
 155
 156         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 157                 INIT_LIST_HEAD(&tq->tq_delayed);
 158
 159         if (!el) {
 160                 ni->ni_cpts  = NULL;
 161                 ni->ni_ncpts = LNET_CPT_NUMBER;
 162         } else {
 163                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 164                 if (rc <= 0) {
 165                         CERROR("Failed to set CPTs for NI %s: %d\n",
 166                                libcfs_net2str(net), rc);
 167                         goto failed;
 168                 }
 169
 170                 LASSERT(rc <= LNET_CPT_NUMBER);
 171                 if (rc == LNET_CPT_NUMBER) {
 172                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 173                         ni->ni_cpts = NULL;
 174                 }
 175
 176                 ni->ni_ncpts = rc;
 177         }
 178
 179         /* LND will fill in the address part of the NID */
 180         ni->ni_nid = LNET_MKNID(net, 0);
 181
 182         /* Store net namespace in which current ni is being created */
 183         if (current->nsproxy->net_ns)
 184                 ni->ni_net_ns = get_net(current->nsproxy->net_ns);
 185         else
 186                 ni->ni_net_ns = NULL;
 187
 188         ni->ni_last_alive = ktime_get_real_seconds();
 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         struct list_head *temp_node;
 208
 209         if (!networks) {
 210                 CERROR("networks string is undefined\n");
 211                 return -EINVAL;
 212         }
 213
 214         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 215                 /* _WAY_ conservative */
 216                 LCONSOLE_ERROR_MSG(0x112,
 217                                    "Can't parse networks: string too long\n");
 218                 return -EINVAL;
 219         }
 220
 221         tokensize = strlen(networks) + 1;
 222
 223         LIBCFS_ALLOC(tokens, tokensize);
 224         if (!tokens) {
 225                 CERROR("Can't allocate net tokens\n");
 226                 return -ENOMEM;
 227         }
 228
 229         memcpy(tokens, networks, tokensize);
 230         tmp = tokens;
 231         str = tokens;
 232
 233         while (str && *str) {
 234                 char *comma = strchr(str, ',');
 235                 char *bracket = strchr(str, '(');
 236                 char *square = strchr(str, '[');
 237                 char *iface;
 238                 int niface;
 239                 int rc;
 240
 241                 /*
 242                  * NB we don't check interface conflicts here; it's the LNDs
 243                  * responsibility (if it cares at all)
 244                  */
 245                 if (square && (!comma || square < comma)) {
 246                         /*
 247                          * i.e: o2ib0(ib0)[1,2], number between square
 248                          * brackets are CPTs this NI needs to be bond
 249                          */
 250                         if (bracket && bracket > square) {
 251                                 tmp = square;
 252                                 goto failed_syntax;
 253                         }
 254
 255                         tmp = strchr(square, ']');
 256                         if (!tmp) {
 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) {
 264                                 tmp = square;
 265                                 goto failed_syntax;
 266                         }
 267
 268                         while (square <= tmp)
 269                                 *square++ = ' ';
 270                 }
 271
 272                 if (!bracket || (comma && comma < bracket)) {
 273                         /* no interface list specified */
 274
 275                         if (comma)
 276                                 *comma++ = 0;
 277                         net = libcfs_str2net(cfs_trimwhite(str));
 278
 279                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 280                                 LCONSOLE_ERROR_MSG(0x113,
 281                                                    "Unrecognised network type\n");
 282                                 tmp = str;
 283                                 goto failed_syntax;
 284                         }
 285
 286                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 287                             !lnet_ni_alloc(net, el, nilist))
 288                                 goto failed;
 289
 290                         if (el) {
 291                                 cfs_expr_list_free(el);
 292                                 el = NULL;
 293                         }
 294
 295                         str = comma;
 296                         continue;
 297                 }
 298
 299                 *bracket = 0;
 300                 net = libcfs_str2net(cfs_trimwhite(str));
 301                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 302                         tmp = str;
 303                         goto failed_syntax;
 304                 }
 305
 306                 ni = lnet_ni_alloc(net, el, nilist);
 307                 if (!ni)
 308                         goto failed;
 309
 310                 if (el) {
 311                         cfs_expr_list_free(el);
 312                         el = NULL;
 313                 }
 314
 315                 niface = 0;
 316                 iface = bracket + 1;
 317
 318                 bracket = strchr(iface, ')');
 319                 if (!bracket) {
 320                         tmp = iface;
 321                         goto failed_syntax;
 322                 }
 323
 324                 *bracket = 0;
 325                 do {
 326                         comma = strchr(iface, ',');
 327                         if (comma)
 328                                 *comma++ = 0;
 329
 330                         iface = cfs_trimwhite(iface);
 331                         if (!*iface) {
 332                                 tmp = iface;
 333                                 goto failed_syntax;
 334                         }
 335
 336                         if (niface == LNET_MAX_INTERFACES) {
 337                                 LCONSOLE_ERROR_MSG(0x115,
 338                                                    "Too many interfaces for net %s\n",
 339                                                    libcfs_net2str(net));
 340                                 goto failed;
 341                         }
 342
 343                         /*
 344                          * Allocate a separate piece of memory and copy
 345                          * into it the string, so we don't have
 346                          * a depencency on the tokens string.  This way we
 347                          * can free the tokens at the end of the function.
 348                          * The newly allocated ni_interfaces[] can be
 349                          * freed when freeing the NI
 350                          */
 351                         LIBCFS_ALLOC(ni->ni_interfaces[niface],
 352                                      strlen(iface) + 1);
 353                         if (!ni->ni_interfaces[niface]) {
 354                                 CERROR("Can't allocate net interface name\n");
 355                                 goto failed;
 356                         }
 357                         strncpy(ni->ni_interfaces[niface], iface,
 358                                 strlen(iface));
 359                         niface++;
 360                         iface = comma;
 361                 } while (iface);
 362
 363                 str = bracket + 1;
 364                 comma = strchr(bracket + 1, ',');
 365                 if (comma) {
 366                         *comma = 0;
 367                         str = cfs_trimwhite(str);
 368                         if (*str) {
 369                                 tmp = str;
 370                                 goto failed_syntax;
 371                         }
 372                         str = comma + 1;
 373                         continue;
 374                 }
 375
 376                 str = cfs_trimwhite(str);
 377                 if (*str) {
 378                         tmp = str;
 379                         goto failed_syntax;
 380                 }
 381         }
 382
 383         list_for_each(temp_node, nilist)
 384                 nnets++;
 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)
 400                 cfs_expr_list_free(el);
 401
 402         LIBCFS_FREE(tokens, tokensize);
 403
 404         return -EINVAL;
 405 }
 406
 407 static struct lnet_text_buf *
 408 lnet_new_text_buf(int str_len)
 409 {
 410         struct lnet_text_buf *ltb;
 411         int nob;
 412
 413         /* NB allocate space for the terminating 0 */
 414         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 415         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 416                 /* _way_ conservative for "route net gateway..." */
 417                 CERROR("text buffer too big\n");
 418                 return NULL;
 419         }
 420
 421         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 422                 CERROR("Too many text buffers\n");
 423                 return NULL;
 424         }
 425
 426         LIBCFS_ALLOC(ltb, nob);
 427         if (!ltb)
 428                 return NULL;
 429
 430         ltb->ltb_size = nob;
 431         ltb->ltb_text[0] = 0;
 432         lnet_tbnob += nob;
 433         return ltb;
 434 }
 435
 436 static void
 437 lnet_free_text_buf(struct lnet_text_buf *ltb)
 438 {
 439         lnet_tbnob -= ltb->ltb_size;
 440         LIBCFS_FREE(ltb, ltb->ltb_size);
 441 }
 442
 443 static void
 444 lnet_free_text_bufs(struct list_head *tbs)
 445 {
 446         struct lnet_text_buf *ltb;
 447
 448         while (!list_empty(tbs)) {
 449                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 450
 451                 list_del(&ltb->ltb_list);
 452                 lnet_free_text_buf(ltb);
 453         }
 454 }
 455
 456 static int
 457 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 458 {
 459         struct list_head pending;
 460         char *sep;
 461         int nob;
 462         int i;
 463         struct lnet_text_buf *ltb;
 464
 465         INIT_LIST_HEAD(&pending);
 466
 467         /* Split 'str' into separate commands */
 468         for (;;) {
 469                 /* skip leading whitespace */
 470                 while (isspace(*str))
 471                         str++;
 472
 473                 /* scan for separator or comment */
 474                 for (sep = str; *sep; sep++)
 475                         if (lnet_issep(*sep) || *sep == '#')
 476                                 break;
 477
 478                 nob = (int)(sep - str);
 479                 if (nob > 0) {
 480                         ltb = lnet_new_text_buf(nob);
 481                         if (!ltb) {
 482                                 lnet_free_text_bufs(&pending);
 483                                 return -ENOMEM;
 484                         }
 485
 486                         for (i = 0; i < nob; i++)
 487                                 if (isspace(str[i]))
 488                                         ltb->ltb_text[i] = ' ';
 489                                 else
 490                                         ltb->ltb_text[i] = str[i];
 491
 492                         ltb->ltb_text[nob] = 0;
 493
 494                         list_add_tail(&ltb->ltb_list, &pending);
 495                 }
 496
 497                 if (*sep == '#') {
 498                         /* scan for separator */
 499                         do {
 500                                 sep++;
 501                         } while (*sep && !lnet_issep(*sep));
 502                 }
 503
 504                 if (!*sep)
 505                         break;
 506
 507                 str = sep + 1;
 508         }
 509
 510         list_splice(&pending, tbs->prev);
 511         return 0;
 512 }
 513
 514 static int
 515 lnet_expand1tb(struct list_head *list,
 516                char *str, char *sep1, char *sep2,
 517                char *item, int itemlen)
 518 {
 519         int len1 = (int)(sep1 - str);
 520         int len2 = strlen(sep2 + 1);
 521         struct lnet_text_buf *ltb;
 522
 523         LASSERT(*sep1 == '[');
 524         LASSERT(*sep2 == ']');
 525
 526         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 527         if (!ltb)
 528                 return -ENOMEM;
 529
 530         memcpy(ltb->ltb_text, str, len1);
 531         memcpy(&ltb->ltb_text[len1], item, itemlen);
 532         memcpy(&ltb->ltb_text[len1 + itemlen], sep2 + 1, len2);
 533         ltb->ltb_text[len1 + itemlen + len2] = 0;
 534
 535         list_add_tail(&ltb->ltb_list, list);
 536         return 0;
 537 }
 538
 539 static int
 540 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 541 {
 542         char num[16];
 543         struct list_head pending;
 544         char *sep;
 545         char *sep2;
 546         char *parsed;
 547         char *enditem;
 548         int lo;
 549         int hi;
 550         int stride;
 551         int i;
 552         int nob;
 553         int scanned;
 554
 555         INIT_LIST_HEAD(&pending);
 556
 557         sep = strchr(str, '[');
 558         if (!sep)                       /* nothing to expand */
 559                 return 0;
 560
 561         sep2 = strchr(sep, ']');
 562         if (!sep2)
 563                 goto failed;
 564
 565         for (parsed = sep; parsed < sep2; parsed = enditem) {
 566                 enditem = ++parsed;
 567                 while (enditem < sep2 && *enditem != ',')
 568                         enditem++;
 569
 570                 if (enditem == parsed)          /* no empty items */
 571                         goto failed;
 572
 573                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi,
 574                            &stride, &scanned) < 3) {
 575                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 576                                 /* simple string enumeration */
 577                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 578                                                    parsed,
 579                                                    (int)(enditem - parsed))) {
 580                                         goto failed;
 581                                 }
 582                                 continue;
 583                         }
 584
 585                         stride = 1;
 586                 }
 587
 588                 /* range expansion */
 589
 590                 if (enditem != parsed + scanned) /* no trailing junk */
 591                         goto failed;
 592
 593                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 594                     (hi - lo) % stride)
 595                         goto failed;
 596
 597                 for (i = lo; i <= hi; i += stride) {
 598                         snprintf(num, sizeof(num), "%d", i);
 599                         nob = strlen(num);
 600                         if (nob + 1 == sizeof(num))
 601                                 goto failed;
 602
 603                         if (lnet_expand1tb(&pending, str, sep, sep2,
 604                                            num, nob))
 605                                 goto failed;
 606                 }
 607         }
 608
 609         list_splice(&pending, tbs->prev);
 610         return 1;
 611
 612  failed:
 613         lnet_free_text_bufs(&pending);
 614         return -EINVAL;
 615 }
 616
 617 static int
 618 lnet_parse_hops(char *str, unsigned int *hops)
 619 {
 620         int len = strlen(str);
 621         int nob = len;
 622
 623         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 624                 nob == len &&
 625                 *hops > 0 && *hops < 256);
 626 }
 627
 628 #define LNET_PRIORITY_SEPARATOR (':')
 629
 630 static int
 631 lnet_parse_priority(char *str, unsigned int *priority, char **token)
 632 {
 633         int nob;
 634         char *sep;
 635         int len;
 636
 637         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
 638         if (!sep) {
 639                 *priority = 0;
 640                 return 0;
 641         }
 642         len = strlen(sep + 1);
 643
 644         if ((sscanf((sep + 1), "%u%n", priority, &nob) < 1) || (len != nob)) {
 645                 /*
 646                  * Update the caller's token pointer so it treats the found
 647                  * priority as the token to report in the error message.
 648                  */
 649                 *token += sep - str + 1;
 650                 return -EINVAL;
 651         }
 652
 653         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
 654
 655         /*
 656          * Change priority separator to \0 to be able to parse NID
 657          */
 658         *sep = '\0';
 659         return 0;
 660 }
 661
 662 static int
 663 lnet_parse_route(char *str, int *im_a_router)
 664 {
 665         /* static scratch buffer OK (single threaded) */
 666         static char cmd[LNET_SINGLE_TEXTBUF_NOB];
 667
 668         struct list_head nets;
 669         struct list_head gateways;
 670         struct list_head *tmp1;
 671         struct list_head *tmp2;
 672         __u32 net;
 673         lnet_nid_t nid;
 674         struct lnet_text_buf *ltb;
 675         int rc;
 676         char *sep;
 677         char *token = str;
 678         int ntokens = 0;
 679         int myrc = -1;
 680         __u32 hops;
 681         int got_hops = 0;
 682         unsigned int priority = 0;
 683
 684         INIT_LIST_HEAD(&gateways);
 685         INIT_LIST_HEAD(&nets);
 686
 687         /* save a copy of the string for error messages */
 688         strncpy(cmd, str, sizeof(cmd));
 689         cmd[sizeof(cmd) - 1] = '\0';
 690
 691         sep = str;
 692         for (;;) {
 693                 /* scan for token start */
 694                 while (isspace(*sep))
 695                         sep++;
 696                 if (!*sep) {
 697                         if (ntokens < (got_hops ? 3 : 2))
 698                                 goto token_error;
 699                         break;
 700                 }
 701
 702                 ntokens++;
 703                 token = sep++;
 704
 705                 /* scan for token end */
 706                 while (*sep && !isspace(*sep))
 707                         sep++;
 708                 if (*sep)
 709                         *sep++ = 0;
 710
 711                 if (ntokens == 1) {
 712                         tmp2 = &nets;           /* expanding nets */
 713                 } else if (ntokens == 2 &&
 714                            lnet_parse_hops(token, &hops)) {
 715                         got_hops = 1;      /* got a hop count */
 716                         continue;
 717                 } else {
 718                         tmp2 = &gateways;       /* expanding gateways */
 719                 }
 720
 721                 ltb = lnet_new_text_buf(strlen(token));
 722                 if (!ltb)
 723                         goto out;
 724
 725                 strcpy(ltb->ltb_text, token);
 726                 tmp1 = &ltb->ltb_list;
 727                 list_add_tail(tmp1, tmp2);
 728
 729                 while (tmp1 != tmp2) {
 730                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 731
 732                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 733                         if (rc < 0)
 734                                 goto token_error;
 735
 736                         tmp1 = tmp1->next;
 737
 738                         if (rc > 0) {           /* expanded! */
 739                                 list_del(&ltb->ltb_list);
 740                                 lnet_free_text_buf(ltb);
 741                                 continue;
 742                         }
 743
 744                         if (ntokens == 1) {
 745                                 net = libcfs_str2net(ltb->ltb_text);
 746                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 747                                     LNET_NETTYP(net) == LOLND)
 748                                         goto token_error;
 749                         } else {
 750                                 rc = lnet_parse_priority(ltb->ltb_text,
 751                                                          &priority, &token);
 752                                 if (rc < 0)
 753                                         goto token_error;
 754
 755                                 nid = libcfs_str2nid(ltb->ltb_text);
 756                                 if (nid == LNET_NID_ANY ||
 757                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 758                                         goto token_error;
 759                         }
 760                 }
 761         }
 762
 763         /**
 764          * if there are no hops set then we want to flag this value as
 765          * unset since hops is an optional parameter
 766          */
 767         if (!got_hops)
 768                 hops = LNET_UNDEFINED_HOPS;
 769
 770         LASSERT(!list_empty(&nets));
 771         LASSERT(!list_empty(&gateways));
 772
 773         list_for_each(tmp1, &nets) {
 774                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 775                 net = libcfs_str2net(ltb->ltb_text);
 776                 LASSERT(net != LNET_NIDNET(LNET_NID_ANY));
 777
 778                 list_for_each(tmp2, &gateways) {
 779                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
 780                         nid = libcfs_str2nid(ltb->ltb_text);
 781                         LASSERT(nid != LNET_NID_ANY);
 782
 783                         if (lnet_islocalnid(nid)) {
 784                                 *im_a_router = 1;
 785                                 continue;
 786                         }
 787
 788                         rc = lnet_add_route(net, hops, nid, priority);
 789                         if (rc && rc != -EEXIST && rc != -EHOSTUNREACH) {
 790                                 CERROR("Can't create route to %s via %s\n",
 791                                        libcfs_net2str(net),
 792                                        libcfs_nid2str(nid));
 793                                 goto out;
 794                         }
 795                 }
 796         }
 797
 798         myrc = 0;
 799         goto out;
 800
 801  token_error:
 802         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 803  out:
 804         lnet_free_text_bufs(&nets);
 805         lnet_free_text_bufs(&gateways);
 806         return myrc;
 807 }
 808
 809 static int
 810 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 811 {
 812         struct lnet_text_buf *ltb;
 813
 814         while (!list_empty(tbs)) {
 815                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 816
 817                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 818                         lnet_free_text_bufs(tbs);
 819                         return -EINVAL;
 820                 }
 821
 822                 list_del(&ltb->ltb_list);
 823                 lnet_free_text_buf(ltb);
 824         }
 825
 826         return 0;
 827 }
 828
 829 int
 830 lnet_parse_routes(char *routes, int *im_a_router)
 831 {
 832         struct list_head tbs;
 833         int rc = 0;
 834
 835         *im_a_router = 0;
 836
 837         INIT_LIST_HEAD(&tbs);
 838
 839         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 840                 CERROR("Error parsing routes\n");
 841                 rc = -EINVAL;
 842         } else {
 843                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 844         }
 845
 846         LASSERT(!lnet_tbnob);
 847         return rc;
 848 }
 849
 850 static int
 851 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 852 {
 853         LIST_HEAD(list);
 854         int rc;
 855         int i;
 856
 857         rc = cfs_ip_addr_parse(token, len, &list);
 858         if (rc)
 859                 return rc;
 860
 861         for (rc = i = 0; !rc && i < nip; i++)
 862                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 863
 864         cfs_expr_list_free_list(&list);
 865
 866         return rc;
 867 }
 868
 869 static int
 870 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 871 {
 872         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 873
 874         int matched = 0;
 875         int ntokens = 0;
 876         int len;
 877         char *net = NULL;
 878         char *sep;
 879         char *token;
 880         int rc;
 881
 882         LASSERT(strlen(net_entry) < sizeof(tokens));
 883
 884         /* work on a copy of the string */
 885         strcpy(tokens, net_entry);
 886         sep = tokens;
 887         for (;;) {
 888                 /* scan for token start */
 889                 while (isspace(*sep))
 890                         sep++;
 891                 if (!*sep)
 892                         break;
 893
 894                 token = sep++;
 895
 896                 /* scan for token end */
 897                 while (*sep && !isspace(*sep))
 898                         sep++;
 899                 if (*sep)
 900                         *sep++ = 0;
 901
 902                 if (!ntokens++) {
 903                         net = token;
 904                         continue;
 905                 }
 906
 907                 len = strlen(token);
 908
 909                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 910                 if (rc < 0) {
 911                         lnet_syntax("ip2nets", net_entry,
 912                                     (int)(token - tokens), len);
 913                         return rc;
 914                 }
 915
 916                 if (rc)
 917                         matched |= 1;
 918         }
 919
 920         if (!matched)
 921                 return 0;
 922
 923         strcpy(net_entry, net);          /* replace with matched net */
 924         return 1;
 925 }
 926
 927 static __u32
 928 lnet_netspec2net(char *netspec)
 929 {
 930         char *bracket = strchr(netspec, '(');
 931         __u32 net;
 932
 933         if (bracket)
 934                 *bracket = 0;
 935
 936         net = libcfs_str2net(netspec);
 937
 938         if (bracket)
 939                 *bracket = '(';
 940
 941         return net;
 942 }
 943
 944 static int
 945 lnet_splitnets(char *source, struct list_head *nets)
 946 {
 947         int offset = 0;
 948         int offset2;
 949         int len;
 950         struct lnet_text_buf *tb;
 951         struct lnet_text_buf *tb2;
 952         struct list_head *t;
 953         char *sep;
 954         char *bracket;
 955         __u32 net;
 956
 957         LASSERT(!list_empty(nets));
 958         LASSERT(nets->next == nets->prev);     /* single entry */
 959
 960         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
 961
 962         for (;;) {
 963                 sep = strchr(tb->ltb_text, ',');
 964                 bracket = strchr(tb->ltb_text, '(');
 965
 966                 if (sep && bracket && bracket < sep) {
 967                         /* netspec lists interfaces... */
 968
 969                         offset2 = offset + (int)(bracket - tb->ltb_text);
 970                         len = strlen(bracket);
 971
 972                         bracket = strchr(bracket + 1, ')');
 973
 974                         if (!bracket ||
 975                             !(bracket[1] == ',' || !bracket[1])) {
 976                                 lnet_syntax("ip2nets", source, offset2, len);
 977                                 return -EINVAL;
 978                         }
 979
 980                         sep = !bracket[1] ? NULL : bracket + 1;
 981                 }
 982
 983                 if (sep)
 984                         *sep++ = 0;
 985
 986                 net = lnet_netspec2net(tb->ltb_text);
 987                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 988                         lnet_syntax("ip2nets", source, offset,
 989                                     strlen(tb->ltb_text));
 990                         return -EINVAL;
 991                 }
 992
 993                 list_for_each(t, nets) {
 994                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
 995
 996                         if (tb2 == tb)
 997                                 continue;
 998
 999                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1000                                 /* duplicate network */
1001                                 lnet_syntax("ip2nets", source, offset,
1002                                             strlen(tb->ltb_text));
1003                                 return -EINVAL;
1004                         }
1005                 }
1006
1007                 if (!sep)
1008                         return 0;
1009
1010                 offset += (int)(sep - tb->ltb_text);
1011                 len = strlen(sep);
1012                 tb2 = lnet_new_text_buf(len);
1013                 if (!tb2)
1014                         return -ENOMEM;
1015
1016                 strncpy(tb2->ltb_text, sep, len);
1017                 tb2->ltb_text[len] = '\0';
1018                 list_add_tail(&tb2->ltb_list, nets);
1019
1020                 tb = tb2;
1021         }
1022 }
1023
1024 static int
1025 lnet_match_networks(char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1026 {
1027         static char networks[LNET_SINGLE_TEXTBUF_NOB];
1028         static char source[LNET_SINGLE_TEXTBUF_NOB];
1029
1030         struct list_head raw_entries;
1031         struct list_head matched_nets;
1032         struct list_head current_nets;
1033         struct list_head *t;
1034         struct list_head *t2;
1035         struct lnet_text_buf *tb;
1036         struct lnet_text_buf *temp;
1037         struct lnet_text_buf *tb2;
1038         __u32 net1;
1039         __u32 net2;
1040         int len;
1041         int count;
1042         int dup;
1043         int rc;
1044
1045         INIT_LIST_HEAD(&raw_entries);
1046         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1047                 CERROR("Error parsing ip2nets\n");
1048                 LASSERT(!lnet_tbnob);
1049                 return -EINVAL;
1050         }
1051
1052         INIT_LIST_HEAD(&matched_nets);
1053         INIT_LIST_HEAD(&current_nets);
1054         networks[0] = 0;
1055         count = 0;
1056         len = 0;
1057         rc = 0;
1058
1059         list_for_each_entry_safe(tb, temp, &raw_entries, ltb_list) {
1060                 strncpy(source, tb->ltb_text, sizeof(source));
1061                 source[sizeof(source) - 1] = '\0';
1062
1063                 /* replace ltb_text with the network(s) add on match */
1064                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1065                 if (rc < 0)
1066                         break;
1067
1068                 list_del(&tb->ltb_list);
1069
1070                 if (!rc) {                /* no match */
1071                         lnet_free_text_buf(tb);
1072                         continue;
1073                 }
1074
1075                 /* split into separate networks */
1076                 INIT_LIST_HEAD(&current_nets);
1077                 list_add(&tb->ltb_list, &current_nets);
1078                 rc = lnet_splitnets(source, &current_nets);
1079                 if (rc < 0)
1080                         break;
1081
1082                 dup = 0;
1083                 list_for_each(t, &current_nets) {
1084                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1085                         net1 = lnet_netspec2net(tb->ltb_text);
1086                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1087
1088                         list_for_each(t2, &matched_nets) {
1089                                 tb2 = list_entry(t2, struct lnet_text_buf,
1090                                                  ltb_list);
1091                                 net2 = lnet_netspec2net(tb2->ltb_text);
1092                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1093
1094                                 if (net1 == net2) {
1095                                         dup = 1;
1096                                         break;
1097                                 }
1098                         }
1099
1100                         if (dup)
1101                                 break;
1102                 }
1103
1104                 if (dup) {
1105                         lnet_free_text_bufs(&current_nets);
1106                         continue;
1107                 }
1108
1109                 list_for_each_safe(t, t2, &current_nets) {
1110                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1111
1112                         list_del(&tb->ltb_list);
1113                         list_add_tail(&tb->ltb_list, &matched_nets);
1114
1115                         len += snprintf(networks + len, sizeof(networks) - len,
1116                                         "%s%s", !len ? "" : ",",
1117                                         tb->ltb_text);
1118
1119                         if (len >= sizeof(networks)) {
1120                                 CERROR("Too many matched networks\n");
1121                                 rc = -E2BIG;
1122                                 goto out;
1123                         }
1124                 }
1125
1126                 count++;
1127         }
1128
1129  out:
1130         lnet_free_text_bufs(&raw_entries);
1131         lnet_free_text_bufs(&matched_nets);
1132         lnet_free_text_bufs(&current_nets);
1133         LASSERT(!lnet_tbnob);
1134
1135         if (rc < 0)
1136                 return rc;
1137
1138         *networksp = networks;
1139         return count;
1140 }
1141
1142 static int
1143 lnet_ipaddr_enumerate(__u32 **ipaddrsp)
1144 {
1145         int up;
1146         __u32 netmask;
1147         __u32 *ipaddrs;
1148         __u32 *ipaddrs2;
1149         int nip;
1150         char **ifnames;
1151         int nif = lnet_ipif_enumerate(&ifnames);
1152         int i;
1153         int rc;
1154
1155         if (nif <= 0)
1156                 return nif;
1157
1158         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1159         if (!ipaddrs) {
1160                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1161                 lnet_ipif_free_enumeration(ifnames, nif);
1162                 return -ENOMEM;
1163         }
1164
1165         for (i = nip = 0; i < nif; i++) {
1166                 if (!strcmp(ifnames[i], "lo"))
1167                         continue;
1168
1169                 rc = lnet_ipif_query(ifnames[i], &up, &ipaddrs[nip], &netmask);
1170                 if (rc) {
1171                         CWARN("Can't query interface %s: %d\n",
1172                               ifnames[i], rc);
1173                         continue;
1174                 }
1175
1176                 if (!up) {
1177                         CWARN("Ignoring interface %s: it's down\n",
1178                               ifnames[i]);
1179                         continue;
1180                 }
1181
1182                 nip++;
1183         }
1184
1185         lnet_ipif_free_enumeration(ifnames, nif);
1186
1187         if (nip == nif) {
1188                 *ipaddrsp = ipaddrs;
1189         } else {
1190                 if (nip > 0) {
1191                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1192                         if (!ipaddrs2) {
1193                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1194                                 nip = -ENOMEM;
1195                         } else {
1196                                 memcpy(ipaddrs2, ipaddrs,
1197                                        nip * sizeof(*ipaddrs));
1198                                 *ipaddrsp = ipaddrs2;
1199                                 rc = nip;
1200                         }
1201                 }
1202                 LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1203         }
1204         return nip;
1205 }
1206
1207 int
1208 lnet_parse_ip2nets(char **networksp, char *ip2nets)
1209 {
1210         __u32 *ipaddrs = NULL;
1211         int nip = lnet_ipaddr_enumerate(&ipaddrs);
1212         int rc;
1213
1214         if (nip < 0) {
1215                 LCONSOLE_ERROR_MSG(0x117,
1216                                    "Error %d enumerating local IP interfaces for ip2nets to match\n",
1217                                    nip);
1218                 return nip;
1219         }
1220
1221         if (!nip) {
1222                 LCONSOLE_ERROR_MSG(0x118,
1223                                    "No local IP interfaces for ip2nets to match\n");
1224                 return -ENOENT;
1225         }
1226
1227         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1228         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1229
1230         if (rc < 0) {
1231                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1232                 return rc;
1233         }
1234
1235         if (!rc) {
1236                 LCONSOLE_ERROR_MSG(0x11a,
1237                                    "ip2nets does not match any local IP interfaces\n");
1238                 return -ENOENT;
1239         }
1240
1241         return 0;
1242 }