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