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, 2015, 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 struct lnet_text_buf {      /* 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 };
  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 static 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 static 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         int i;
 100
 101         if (ni->ni_refs)
 102                 cfs_percpt_free(ni->ni_refs);
 103
 104         if (ni->ni_tx_queues)
 105                 cfs_percpt_free(ni->ni_tx_queues);
 106
 107         if (ni->ni_cpts)
 108                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 109
 110         for (i = 0; i < LNET_MAX_INTERFACES && ni->ni_interfaces[i]; i++) {
 111                 LIBCFS_FREE(ni->ni_interfaces[i],
 112                             strlen(ni->ni_interfaces[i]) + 1);
 113         }
 114         LIBCFS_FREE(ni, sizeof(*ni));
 115 }
 116
 117 lnet_ni_t *
 118 lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, struct list_head *nilist)
 119 {
 120         struct lnet_tx_queue *tq;
 121         struct lnet_ni *ni;
 122         int rc;
 123         int i;
 124
 125         if (!lnet_net_unique(net, nilist)) {
 126                 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
 127                                    libcfs_net2str(net));
 128                 return NULL;
 129         }
 130
 131         LIBCFS_ALLOC(ni, sizeof(*ni));
 132         if (!ni) {
 133                 CERROR("Out of memory creating network %s\n",
 134                        libcfs_net2str(net));
 135                 return NULL;
 136         }
 137
 138         spin_lock_init(&ni->ni_lock);
 139         INIT_LIST_HEAD(&ni->ni_cptlist);
 140         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 141                                        sizeof(*ni->ni_refs[0]));
 142         if (!ni->ni_refs)
 143                 goto failed;
 144
 145         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 146                                             sizeof(*ni->ni_tx_queues[0]));
 147         if (!ni->ni_tx_queues)
 148                 goto failed;
 149
 150         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 151                 INIT_LIST_HEAD(&tq->tq_delayed);
 152
 153         if (!el) {
 154                 ni->ni_cpts  = NULL;
 155                 ni->ni_ncpts = LNET_CPT_NUMBER;
 156         } else {
 157                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 158                 if (rc <= 0) {
 159                         CERROR("Failed to set CPTs for NI %s: %d\n",
 160                                libcfs_net2str(net), rc);
 161                         goto failed;
 162                 }
 163
 164                 LASSERT(rc <= LNET_CPT_NUMBER);
 165                 if (rc == LNET_CPT_NUMBER) {
 166                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 167                         ni->ni_cpts = NULL;
 168                 }
 169
 170                 ni->ni_ncpts = rc;
 171         }
 172
 173         /* LND will fill in the address part of the NID */
 174         ni->ni_nid = LNET_MKNID(net, 0);
 175         ni->ni_last_alive = ktime_get_real_seconds();
 176         list_add_tail(&ni->ni_list, nilist);
 177         return ni;
 178  failed:
 179         lnet_ni_free(ni);
 180         return NULL;
 181 }
 182
 183 int
 184 lnet_parse_networks(struct list_head *nilist, char *networks)
 185 {
 186         struct cfs_expr_list *el = NULL;
 187         int tokensize;
 188         char *tokens;
 189         char *str;
 190         char *tmp;
 191         struct lnet_ni *ni;
 192         __u32 net;
 193         int nnets = 0;
 194         struct list_head *temp_node;
 195
 196         if (!networks) {
 197                 CERROR("networks string is undefined\n");
 198                 return -EINVAL;
 199         }
 200
 201         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 202                 /* _WAY_ conservative */
 203                 LCONSOLE_ERROR_MSG(0x112,
 204                                    "Can't parse networks: string too long\n");
 205                 return -EINVAL;
 206         }
 207
 208         tokensize = strlen(networks) + 1;
 209
 210         LIBCFS_ALLOC(tokens, tokensize);
 211         if (!tokens) {
 212                 CERROR("Can't allocate net tokens\n");
 213                 return -ENOMEM;
 214         }
 215
 216         memcpy(tokens, networks, tokensize);
 217         tmp = tokens;
 218         str = tokens;
 219
 220         while (str && *str) {
 221                 char *comma = strchr(str, ',');
 222                 char *bracket = strchr(str, '(');
 223                 char *square = strchr(str, '[');
 224                 char *iface;
 225                 int niface;
 226                 int rc;
 227
 228                 /*
 229                  * NB we don't check interface conflicts here; it's the LNDs
 230                  * responsibility (if it cares at all)
 231                  */
 232                 if (square && (!comma || square < comma)) {
 233                         /*
 234                          * i.e: o2ib0(ib0)[1,2], number between square
 235                          * brackets are CPTs this NI needs to be bond
 236                          */
 237                         if (bracket && bracket > square) {
 238                                 tmp = square;
 239                                 goto failed_syntax;
 240                         }
 241
 242                         tmp = strchr(square, ']');
 243                         if (!tmp) {
 244                                 tmp = square;
 245                                 goto failed_syntax;
 246                         }
 247
 248                         rc = cfs_expr_list_parse(square, tmp - square + 1,
 249                                                  0, LNET_CPT_NUMBER - 1, &el);
 250                         if (rc) {
 251                                 tmp = square;
 252                                 goto failed_syntax;
 253                         }
 254
 255                         while (square <= tmp)
 256                                 *square++ = ' ';
 257                 }
 258
 259                 if (!bracket || (comma && comma < bracket)) {
 260                         /* no interface list specified */
 261
 262                         if (comma)
 263                                 *comma++ = 0;
 264                         net = libcfs_str2net(cfs_trimwhite(str));
 265
 266                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 267                                 LCONSOLE_ERROR_MSG(0x113,
 268                                                    "Unrecognised network type\n");
 269                                 tmp = str;
 270                                 goto failed_syntax;
 271                         }
 272
 273                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 274                             !lnet_ni_alloc(net, el, nilist))
 275                                 goto failed;
 276
 277                         if (el) {
 278                                 cfs_expr_list_free(el);
 279                                 el = NULL;
 280                         }
 281
 282                         str = comma;
 283                         continue;
 284                 }
 285
 286                 *bracket = 0;
 287                 net = libcfs_str2net(cfs_trimwhite(str));
 288                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 289                         tmp = str;
 290                         goto failed_syntax;
 291                 }
 292
 293                 ni = lnet_ni_alloc(net, el, nilist);
 294                 if (!ni)
 295                         goto failed;
 296
 297                 if (el) {
 298                         cfs_expr_list_free(el);
 299                         el = NULL;
 300                 }
 301
 302                 niface = 0;
 303                 iface = bracket + 1;
 304
 305                 bracket = strchr(iface, ')');
 306                 if (!bracket) {
 307                         tmp = iface;
 308                         goto failed_syntax;
 309                 }
 310
 311                 *bracket = 0;
 312                 do {
 313                         comma = strchr(iface, ',');
 314                         if (comma)
 315                                 *comma++ = 0;
 316
 317                         iface = cfs_trimwhite(iface);
 318                         if (!*iface) {
 319                                 tmp = iface;
 320                                 goto failed_syntax;
 321                         }
 322
 323                         if (niface == LNET_MAX_INTERFACES) {
 324                                 LCONSOLE_ERROR_MSG(0x115,
 325                                                    "Too many interfaces for net %s\n",
 326                                                    libcfs_net2str(net));
 327                                 goto failed;
 328                         }
 329
 330                         /*
 331                          * Allocate a separate piece of memory and copy
 332                          * into it the string, so we don't have
 333                          * a depencency on the tokens string.  This way we
 334                          * can free the tokens at the end of the function.
 335                          * The newly allocated ni_interfaces[] can be
 336                          * freed when freeing the NI
 337                          */
 338                         LIBCFS_ALLOC(ni->ni_interfaces[niface],
 339                                      strlen(iface) + 1);
 340                         if (!ni->ni_interfaces[niface]) {
 341                                 CERROR("Can't allocate net interface name\n");
 342                                 goto failed;
 343                         }
 344                         strncpy(ni->ni_interfaces[niface], iface,
 345                                 strlen(iface));
 346                         niface++;
 347                         iface = comma;
 348                 } while (iface);
 349
 350                 str = bracket + 1;
 351                 comma = strchr(bracket + 1, ',');
 352                 if (comma) {
 353                         *comma = 0;
 354                         str = cfs_trimwhite(str);
 355                         if (*str) {
 356                                 tmp = str;
 357                                 goto failed_syntax;
 358                         }
 359                         str = comma + 1;
 360                         continue;
 361                 }
 362
 363                 str = cfs_trimwhite(str);
 364                 if (*str) {
 365                         tmp = str;
 366                         goto failed_syntax;
 367                 }
 368         }
 369
 370         list_for_each(temp_node, nilist)
 371                 nnets++;
 372
 373         LIBCFS_FREE(tokens, tokensize);
 374         return nnets;
 375
 376  failed_syntax:
 377         lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
 378  failed:
 379         while (!list_empty(nilist)) {
 380                 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
 381
 382                 list_del(&ni->ni_list);
 383                 lnet_ni_free(ni);
 384         }
 385
 386         if (el)
 387                 cfs_expr_list_free(el);
 388
 389         LIBCFS_FREE(tokens, tokensize);
 390
 391         return -EINVAL;
 392 }
 393
 394 static struct lnet_text_buf *
 395 lnet_new_text_buf(int str_len)
 396 {
 397         struct lnet_text_buf *ltb;
 398         int nob;
 399
 400         /* NB allocate space for the terminating 0 */
 401         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 402         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 403                 /* _way_ conservative for "route net gateway..." */
 404                 CERROR("text buffer too big\n");
 405                 return NULL;
 406         }
 407
 408         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 409                 CERROR("Too many text buffers\n");
 410                 return NULL;
 411         }
 412
 413         LIBCFS_ALLOC(ltb, nob);
 414         if (!ltb)
 415                 return NULL;
 416
 417         ltb->ltb_size = nob;
 418         ltb->ltb_text[0] = 0;
 419         lnet_tbnob += nob;
 420         return ltb;
 421 }
 422
 423 static void
 424 lnet_free_text_buf(struct lnet_text_buf *ltb)
 425 {
 426         lnet_tbnob -= ltb->ltb_size;
 427         LIBCFS_FREE(ltb, ltb->ltb_size);
 428 }
 429
 430 static void
 431 lnet_free_text_bufs(struct list_head *tbs)
 432 {
 433         struct lnet_text_buf *ltb;
 434
 435         while (!list_empty(tbs)) {
 436                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 437
 438                 list_del(&ltb->ltb_list);
 439                 lnet_free_text_buf(ltb);
 440         }
 441 }
 442
 443 static int
 444 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 445 {
 446         struct list_head pending;
 447         char *sep;
 448         int nob;
 449         int i;
 450         struct lnet_text_buf *ltb;
 451
 452         INIT_LIST_HEAD(&pending);
 453
 454         /* Split 'str' into separate commands */
 455         for (;;) {
 456                 /* skip leading whitespace */
 457                 while (isspace(*str))
 458                         str++;
 459
 460                 /* scan for separator or comment */
 461                 for (sep = str; *sep; sep++)
 462                         if (lnet_issep(*sep) || *sep == '#')
 463                                 break;
 464
 465                 nob = (int)(sep - str);
 466                 if (nob > 0) {
 467                         ltb = lnet_new_text_buf(nob);
 468                         if (!ltb) {
 469                                 lnet_free_text_bufs(&pending);
 470                                 return -ENOMEM;
 471                         }
 472
 473                         for (i = 0; i < nob; i++)
 474                                 if (isspace(str[i]))
 475                                         ltb->ltb_text[i] = ' ';
 476                                 else
 477                                         ltb->ltb_text[i] = str[i];
 478
 479                         ltb->ltb_text[nob] = 0;
 480
 481                         list_add_tail(&ltb->ltb_list, &pending);
 482                 }
 483
 484                 if (*sep == '#') {
 485                         /* scan for separator */
 486                         do {
 487                                 sep++;
 488                         } while (*sep && !lnet_issep(*sep));
 489                 }
 490
 491                 if (!*sep)
 492                         break;
 493
 494                 str = sep + 1;
 495         }
 496
 497         list_splice(&pending, tbs->prev);
 498         return 0;
 499 }
 500
 501 static int
 502 lnet_expand1tb(struct list_head *list,
 503                char *str, char *sep1, char *sep2,
 504                char *item, int itemlen)
 505 {
 506         int len1 = (int)(sep1 - str);
 507         int len2 = strlen(sep2 + 1);
 508         struct lnet_text_buf *ltb;
 509
 510         LASSERT(*sep1 == '[');
 511         LASSERT(*sep2 == ']');
 512
 513         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 514         if (!ltb)
 515                 return -ENOMEM;
 516
 517         memcpy(ltb->ltb_text, str, len1);
 518         memcpy(&ltb->ltb_text[len1], item, itemlen);
 519         memcpy(&ltb->ltb_text[len1 + itemlen], sep2 + 1, len2);
 520         ltb->ltb_text[len1 + itemlen + len2] = 0;
 521
 522         list_add_tail(&ltb->ltb_list, list);
 523         return 0;
 524 }
 525
 526 static int
 527 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 528 {
 529         char num[16];
 530         struct list_head pending;
 531         char *sep;
 532         char *sep2;
 533         char *parsed;
 534         char *enditem;
 535         int lo;
 536         int hi;
 537         int stride;
 538         int i;
 539         int nob;
 540         int scanned;
 541
 542         INIT_LIST_HEAD(&pending);
 543
 544         sep = strchr(str, '[');
 545         if (!sep)                       /* nothing to expand */
 546                 return 0;
 547
 548         sep2 = strchr(sep, ']');
 549         if (!sep2)
 550                 goto failed;
 551
 552         for (parsed = sep; parsed < sep2; parsed = enditem) {
 553                 enditem = ++parsed;
 554                 while (enditem < sep2 && *enditem != ',')
 555                         enditem++;
 556
 557                 if (enditem == parsed)          /* no empty items */
 558                         goto failed;
 559
 560                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi,
 561                            &stride, &scanned) < 3) {
 562                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 563                                 /* simple string enumeration */
 564                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 565                                                    parsed,
 566                                                    (int)(enditem - parsed))) {
 567                                         goto failed;
 568                                 }
 569                                 continue;
 570                         }
 571
 572                         stride = 1;
 573                 }
 574
 575                 /* range expansion */
 576
 577                 if (enditem != parsed + scanned) /* no trailing junk */
 578                         goto failed;
 579
 580                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 581                     (hi - lo) % stride)
 582                         goto failed;
 583
 584                 for (i = lo; i <= hi; i += stride) {
 585                         snprintf(num, sizeof(num), "%d", i);
 586                         nob = strlen(num);
 587                         if (nob + 1 == sizeof(num))
 588                                 goto failed;
 589
 590                         if (lnet_expand1tb(&pending, str, sep, sep2,
 591                                            num, nob))
 592                                 goto failed;
 593                 }
 594         }
 595
 596         list_splice(&pending, tbs->prev);
 597         return 1;
 598
 599  failed:
 600         lnet_free_text_bufs(&pending);
 601         return -EINVAL;
 602 }
 603
 604 static int
 605 lnet_parse_hops(char *str, unsigned int *hops)
 606 {
 607         int len = strlen(str);
 608         int nob = len;
 609
 610         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 611                 nob == len &&
 612                 *hops > 0 && *hops < 256);
 613 }
 614
 615 #define LNET_PRIORITY_SEPARATOR (':')
 616
 617 static int
 618 lnet_parse_priority(char *str, unsigned int *priority, char **token)
 619 {
 620         int nob;
 621         char *sep;
 622         int len;
 623
 624         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
 625         if (!sep) {
 626                 *priority = 0;
 627                 return 0;
 628         }
 629         len = strlen(sep + 1);
 630
 631         if ((sscanf((sep + 1), "%u%n", priority, &nob) < 1) || (len != nob)) {
 632                 /*
 633                  * Update the caller's token pointer so it treats the found
 634                  * priority as the token to report in the error message.
 635                  */
 636                 *token += sep - str + 1;
 637                 return -EINVAL;
 638         }
 639
 640         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
 641
 642         /*
 643          * Change priority separator to \0 to be able to parse NID
 644          */
 645         *sep = '\0';
 646         return 0;
 647 }
 648
 649 static int
 650 lnet_parse_route(char *str, int *im_a_router)
 651 {
 652         /* static scratch buffer OK (single threaded) */
 653         static char cmd[LNET_SINGLE_TEXTBUF_NOB];
 654
 655         struct list_head nets;
 656         struct list_head gateways;
 657         struct list_head *tmp1;
 658         struct list_head *tmp2;
 659         __u32 net;
 660         lnet_nid_t nid;
 661         struct lnet_text_buf *ltb;
 662         int rc;
 663         char *sep;
 664         char *token = str;
 665         int ntokens = 0;
 666         int myrc = -1;
 667         __u32 hops;
 668         int got_hops = 0;
 669         unsigned int priority = 0;
 670
 671         INIT_LIST_HEAD(&gateways);
 672         INIT_LIST_HEAD(&nets);
 673
 674         /* save a copy of the string for error messages */
 675         strncpy(cmd, str, sizeof(cmd));
 676         cmd[sizeof(cmd) - 1] = '\0';
 677
 678         sep = str;
 679         for (;;) {
 680                 /* scan for token start */
 681                 while (isspace(*sep))
 682                         sep++;
 683                 if (!*sep) {
 684                         if (ntokens < (got_hops ? 3 : 2))
 685                                 goto token_error;
 686                         break;
 687                 }
 688
 689                 ntokens++;
 690                 token = sep++;
 691
 692                 /* scan for token end */
 693                 while (*sep && !isspace(*sep))
 694                         sep++;
 695                 if (*sep)
 696                         *sep++ = 0;
 697
 698                 if (ntokens == 1) {
 699                         tmp2 = &nets;           /* expanding nets */
 700                 } else if (ntokens == 2 &&
 701                            lnet_parse_hops(token, &hops)) {
 702                         got_hops = 1;      /* got a hop count */
 703                         continue;
 704                 } else {
 705                         tmp2 = &gateways;       /* expanding gateways */
 706                 }
 707
 708                 ltb = lnet_new_text_buf(strlen(token));
 709                 if (!ltb)
 710                         goto out;
 711
 712                 strcpy(ltb->ltb_text, token);
 713                 tmp1 = &ltb->ltb_list;
 714                 list_add_tail(tmp1, tmp2);
 715
 716                 while (tmp1 != tmp2) {
 717                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 718
 719                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 720                         if (rc < 0)
 721                                 goto token_error;
 722
 723                         tmp1 = tmp1->next;
 724
 725                         if (rc > 0) {           /* expanded! */
 726                                 list_del(&ltb->ltb_list);
 727                                 lnet_free_text_buf(ltb);
 728                                 continue;
 729                         }
 730
 731                         if (ntokens == 1) {
 732                                 net = libcfs_str2net(ltb->ltb_text);
 733                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 734                                     LNET_NETTYP(net) == LOLND)
 735                                         goto token_error;
 736                         } else {
 737                                 rc = lnet_parse_priority(ltb->ltb_text,
 738                                                          &priority, &token);
 739                                 if (rc < 0)
 740                                         goto token_error;
 741
 742                                 nid = libcfs_str2nid(ltb->ltb_text);
 743                                 if (nid == LNET_NID_ANY ||
 744                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 745                                         goto token_error;
 746                         }
 747                 }
 748         }
 749
 750         /**
 751          * if there are no hops set then we want to flag this value as
 752          * unset since hops is an optional parameter
 753          */
 754         if (!got_hops)
 755                 hops = LNET_UNDEFINED_HOPS;
 756
 757         LASSERT(!list_empty(&nets));
 758         LASSERT(!list_empty(&gateways));
 759
 760         list_for_each(tmp1, &nets) {
 761                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
 762                 net = libcfs_str2net(ltb->ltb_text);
 763                 LASSERT(net != LNET_NIDNET(LNET_NID_ANY));
 764
 765                 list_for_each(tmp2, &gateways) {
 766                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
 767                         nid = libcfs_str2nid(ltb->ltb_text);
 768                         LASSERT(nid != LNET_NID_ANY);
 769
 770                         if (lnet_islocalnid(nid)) {
 771                                 *im_a_router = 1;
 772                                 continue;
 773                         }
 774
 775                         rc = lnet_add_route(net, hops, nid, priority);
 776                         if (rc && rc != -EEXIST && rc != -EHOSTUNREACH) {
 777                                 CERROR("Can't create route to %s via %s\n",
 778                                        libcfs_net2str(net),
 779                                        libcfs_nid2str(nid));
 780                                 goto out;
 781                         }
 782                 }
 783         }
 784
 785         myrc = 0;
 786         goto out;
 787
 788  token_error:
 789         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 790  out:
 791         lnet_free_text_bufs(&nets);
 792         lnet_free_text_bufs(&gateways);
 793         return myrc;
 794 }
 795
 796 static int
 797 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 798 {
 799         struct lnet_text_buf *ltb;
 800
 801         while (!list_empty(tbs)) {
 802                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 803
 804                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 805                         lnet_free_text_bufs(tbs);
 806                         return -EINVAL;
 807                 }
 808
 809                 list_del(&ltb->ltb_list);
 810                 lnet_free_text_buf(ltb);
 811         }
 812
 813         return 0;
 814 }
 815
 816 int
 817 lnet_parse_routes(char *routes, int *im_a_router)
 818 {
 819         struct list_head tbs;
 820         int rc = 0;
 821
 822         *im_a_router = 0;
 823
 824         INIT_LIST_HEAD(&tbs);
 825
 826         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 827                 CERROR("Error parsing routes\n");
 828                 rc = -EINVAL;
 829         } else {
 830                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 831         }
 832
 833         LASSERT(!lnet_tbnob);
 834         return rc;
 835 }
 836
 837 static int
 838 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 839 {
 840         LIST_HEAD(list);
 841         int rc;
 842         int i;
 843
 844         rc = cfs_ip_addr_parse(token, len, &list);
 845         if (rc)
 846                 return rc;
 847
 848         for (rc = i = 0; !rc && i < nip; i++)
 849                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 850
 851         cfs_expr_list_free_list(&list);
 852
 853         return rc;
 854 }
 855
 856 static int
 857 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 858 {
 859         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 860
 861         int matched = 0;
 862         int ntokens = 0;
 863         int len;
 864         char *net = NULL;
 865         char *sep;
 866         char *token;
 867         int rc;
 868
 869         LASSERT(strlen(net_entry) < sizeof(tokens));
 870
 871         /* work on a copy of the string */
 872         strcpy(tokens, net_entry);
 873         sep = tokens;
 874         for (;;) {
 875                 /* scan for token start */
 876                 while (isspace(*sep))
 877                         sep++;
 878                 if (!*sep)
 879                         break;
 880
 881                 token = sep++;
 882
 883                 /* scan for token end */
 884                 while (*sep && !isspace(*sep))
 885                         sep++;
 886                 if (*sep)
 887                         *sep++ = 0;
 888
 889                 if (!ntokens++) {
 890                         net = token;
 891                         continue;
 892                 }
 893
 894                 len = strlen(token);
 895
 896                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 897                 if (rc < 0) {
 898                         lnet_syntax("ip2nets", net_entry,
 899                                     (int)(token - tokens), len);
 900                         return rc;
 901                 }
 902
 903                 if (rc)
 904                         matched |= 1;
 905         }
 906
 907         if (!matched)
 908                 return 0;
 909
 910         strcpy(net_entry, net);          /* replace with matched net */
 911         return 1;
 912 }
 913
 914 static __u32
 915 lnet_netspec2net(char *netspec)
 916 {
 917         char *bracket = strchr(netspec, '(');
 918         __u32 net;
 919
 920         if (bracket)
 921                 *bracket = 0;
 922
 923         net = libcfs_str2net(netspec);
 924
 925         if (bracket)
 926                 *bracket = '(';
 927
 928         return net;
 929 }
 930
 931 static int
 932 lnet_splitnets(char *source, struct list_head *nets)
 933 {
 934         int offset = 0;
 935         int offset2;
 936         int len;
 937         struct lnet_text_buf *tb;
 938         struct lnet_text_buf *tb2;
 939         struct list_head *t;
 940         char *sep;
 941         char *bracket;
 942         __u32 net;
 943
 944         LASSERT(!list_empty(nets));
 945         LASSERT(nets->next == nets->prev);     /* single entry */
 946
 947         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
 948
 949         for (;;) {
 950                 sep = strchr(tb->ltb_text, ',');
 951                 bracket = strchr(tb->ltb_text, '(');
 952
 953                 if (sep && bracket && bracket < sep) {
 954                         /* netspec lists interfaces... */
 955
 956                         offset2 = offset + (int)(bracket - tb->ltb_text);
 957                         len = strlen(bracket);
 958
 959                         bracket = strchr(bracket + 1, ')');
 960
 961                         if (!bracket ||
 962                             !(bracket[1] == ',' || !bracket[1])) {
 963                                 lnet_syntax("ip2nets", source, offset2, len);
 964                                 return -EINVAL;
 965                         }
 966
 967                         sep = !bracket[1] ? NULL : bracket + 1;
 968                 }
 969
 970                 if (sep)
 971                         *sep++ = 0;
 972
 973                 net = lnet_netspec2net(tb->ltb_text);
 974                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 975                         lnet_syntax("ip2nets", source, offset,
 976                                     strlen(tb->ltb_text));
 977                         return -EINVAL;
 978                 }
 979
 980                 list_for_each(t, nets) {
 981                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
 982
 983                         if (tb2 == tb)
 984                                 continue;
 985
 986                         if (net == lnet_netspec2net(tb2->ltb_text)) {
 987                                 /* duplicate network */
 988                                 lnet_syntax("ip2nets", source, offset,
 989                                             strlen(tb->ltb_text));
 990                                 return -EINVAL;
 991                         }
 992                 }
 993
 994                 if (!sep)
 995                         return 0;
 996
 997                 offset += (int)(sep - tb->ltb_text);
 998                 len = strlen(sep);
 999                 tb2 = lnet_new_text_buf(len);
1000                 if (!tb2)
1001                         return -ENOMEM;
1002
1003                 strncpy(tb2->ltb_text, sep, len);
1004                 tb2->ltb_text[len] = '\0';
1005                 list_add_tail(&tb2->ltb_list, nets);
1006
1007                 tb = tb2;
1008         }
1009 }
1010
1011 static int
1012 lnet_match_networks(char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1013 {
1014         static char networks[LNET_SINGLE_TEXTBUF_NOB];
1015         static char source[LNET_SINGLE_TEXTBUF_NOB];
1016
1017         struct list_head raw_entries;
1018         struct list_head matched_nets;
1019         struct list_head current_nets;
1020         struct list_head *t;
1021         struct list_head *t2;
1022         struct lnet_text_buf *tb;
1023         struct lnet_text_buf *temp;
1024         struct lnet_text_buf *tb2;
1025         __u32 net1;
1026         __u32 net2;
1027         int len;
1028         int count;
1029         int dup;
1030         int rc;
1031
1032         INIT_LIST_HEAD(&raw_entries);
1033         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1034                 CERROR("Error parsing ip2nets\n");
1035                 LASSERT(!lnet_tbnob);
1036                 return -EINVAL;
1037         }
1038
1039         INIT_LIST_HEAD(&matched_nets);
1040         INIT_LIST_HEAD(&current_nets);
1041         networks[0] = 0;
1042         count = 0;
1043         len = 0;
1044         rc = 0;
1045
1046         list_for_each_entry_safe(tb, temp, &raw_entries, ltb_list) {
1047                 strncpy(source, tb->ltb_text, sizeof(source));
1048                 source[sizeof(source) - 1] = '\0';
1049
1050                 /* replace ltb_text with the network(s) add on match */
1051                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1052                 if (rc < 0)
1053                         break;
1054
1055                 list_del(&tb->ltb_list);
1056
1057                 if (!rc) {                /* no match */
1058                         lnet_free_text_buf(tb);
1059                         continue;
1060                 }
1061
1062                 /* split into separate networks */
1063                 INIT_LIST_HEAD(&current_nets);
1064                 list_add(&tb->ltb_list, &current_nets);
1065                 rc = lnet_splitnets(source, &current_nets);
1066                 if (rc < 0)
1067                         break;
1068
1069                 dup = 0;
1070                 list_for_each(t, &current_nets) {
1071                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1072                         net1 = lnet_netspec2net(tb->ltb_text);
1073                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1074
1075                         list_for_each(t2, &matched_nets) {
1076                                 tb2 = list_entry(t2, struct lnet_text_buf,
1077                                                  ltb_list);
1078                                 net2 = lnet_netspec2net(tb2->ltb_text);
1079                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1080
1081                                 if (net1 == net2) {
1082                                         dup = 1;
1083                                         break;
1084                                 }
1085                         }
1086
1087                         if (dup)
1088                                 break;
1089                 }
1090
1091                 if (dup) {
1092                         lnet_free_text_bufs(&current_nets);
1093                         continue;
1094                 }
1095
1096                 list_for_each_safe(t, t2, &current_nets) {
1097                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1098
1099                         list_del(&tb->ltb_list);
1100                         list_add_tail(&tb->ltb_list, &matched_nets);
1101
1102                         len += snprintf(networks + len, sizeof(networks) - len,
1103                                         "%s%s", !len ? "" : ",",
1104                                         tb->ltb_text);
1105
1106                         if (len >= sizeof(networks)) {
1107                                 CERROR("Too many matched networks\n");
1108                                 rc = -E2BIG;
1109                                 goto out;
1110                         }
1111                 }
1112
1113                 count++;
1114         }
1115
1116  out:
1117         lnet_free_text_bufs(&raw_entries);
1118         lnet_free_text_bufs(&matched_nets);
1119         lnet_free_text_bufs(&current_nets);
1120         LASSERT(!lnet_tbnob);
1121
1122         if (rc < 0)
1123                 return rc;
1124
1125         *networksp = networks;
1126         return count;
1127 }
1128
1129 static int
1130 lnet_ipaddr_enumerate(__u32 **ipaddrsp)
1131 {
1132         int up;
1133         __u32 netmask;
1134         __u32 *ipaddrs;
1135         __u32 *ipaddrs2;
1136         int nip;
1137         char **ifnames;
1138         int nif = lnet_ipif_enumerate(&ifnames);
1139         int i;
1140         int rc;
1141
1142         if (nif <= 0)
1143                 return nif;
1144
1145         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1146         if (!ipaddrs) {
1147                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1148                 lnet_ipif_free_enumeration(ifnames, nif);
1149                 return -ENOMEM;
1150         }
1151
1152         for (i = nip = 0; i < nif; i++) {
1153                 if (!strcmp(ifnames[i], "lo"))
1154                         continue;
1155
1156                 rc = lnet_ipif_query(ifnames[i], &up, &ipaddrs[nip], &netmask);
1157                 if (rc) {
1158                         CWARN("Can't query interface %s: %d\n",
1159                               ifnames[i], rc);
1160                         continue;
1161                 }
1162
1163                 if (!up) {
1164                         CWARN("Ignoring interface %s: it's down\n",
1165                               ifnames[i]);
1166                         continue;
1167                 }
1168
1169                 nip++;
1170         }
1171
1172         lnet_ipif_free_enumeration(ifnames, nif);
1173
1174         if (nip == nif) {
1175                 *ipaddrsp = ipaddrs;
1176         } else {
1177                 if (nip > 0) {
1178                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1179                         if (!ipaddrs2) {
1180                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1181                                 nip = -ENOMEM;
1182                         } else {
1183                                 memcpy(ipaddrs2, ipaddrs,
1184                                        nip * sizeof(*ipaddrs));
1185                                 *ipaddrsp = ipaddrs2;
1186                                 rc = nip;
1187                         }
1188                 }
1189                 LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1190         }
1191         return nip;
1192 }
1193
1194 int
1195 lnet_parse_ip2nets(char **networksp, char *ip2nets)
1196 {
1197         __u32 *ipaddrs = NULL;
1198         int nip = lnet_ipaddr_enumerate(&ipaddrs);
1199         int rc;
1200
1201         if (nip < 0) {
1202                 LCONSOLE_ERROR_MSG(0x117,
1203                                    "Error %d enumerating local IP interfaces for ip2nets to match\n",
1204                                    nip);
1205                 return nip;
1206         }
1207
1208         if (!nip) {
1209                 LCONSOLE_ERROR_MSG(0x118,
1210                                    "No local IP interfaces for ip2nets to match\n");
1211                 return -ENOENT;
1212         }
1213
1214         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1215         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1216
1217         if (rc < 0) {
1218                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1219                 return rc;
1220         }
1221
1222         if (!rc) {
1223                 LCONSOLE_ERROR_MSG(0x11a,
1224                                    "ip2nets does not match any local IP interfaces\n");
1225                 return -ENOENT;
1226         }
1227
1228         return 0;
1229 }