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