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 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  */
  34
  35 #define DEBUG_SUBSYSTEM S_LNET
  36 #include <lnet/lib-lnet.h>
  37
  38 typedef struct {                            /* tmp struct for parsing routes */
  39         cfs_list_t         ltb_list;        /* stash on lists */
  40         int                ltb_size;        /* allocated size */
  41         char               ltb_text[0];     /* text buffer */
  42 } lnet_text_buf_t;
  43
  44 static int lnet_tbnob = 0;                      /* track text buf allocation */
  45 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  46 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  47
  48 void
  49 lnet_syntax(char *name, char *str, int offset, int width)
  50 {
  51         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  52         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  53
  54         memset(dots, '.', sizeof(dots));
  55         dots[sizeof(dots)-1] = 0;
  56         memset(dashes, '-', sizeof(dashes));
  57         dashes[sizeof(dashes)-1] = 0;
  58
  59         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  60         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  61                            (int)strlen(name), dots, offset, dots,
  62                             (width < 1) ? 0 : width - 1, dashes);
  63 }
  64
  65 int
  66 lnet_issep (char c)
  67 {
  68         switch (c) {
  69         case '\n':
  70         case '\r':
  71         case ';':
  72                 return 1;
  73         default:
  74                 return 0;
  75         }
  76 }
  77
  78 int
  79 lnet_net_unique(__u32 net, cfs_list_t *nilist)
  80 {
  81         cfs_list_t       *tmp;
  82         lnet_ni_t        *ni;
  83
  84         cfs_list_for_each (tmp, nilist) {
  85                 ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
  86
  87                 if (LNET_NIDNET(ni->ni_nid) == net)
  88                         return 0;
  89         }
  90
  91         return 1;
  92 }
  93
  94 void
  95 lnet_ni_free(struct lnet_ni *ni)
  96 {
  97         if (ni->ni_refs != NULL)
  98                 cfs_percpt_free(ni->ni_refs);
  99
 100         if (ni->ni_tx_queues != NULL)
 101                 cfs_percpt_free(ni->ni_tx_queues);
 102
 103         if (ni->ni_cpts != NULL) {
 104                 LIBCFS_FREE(ni->ni_cpts,
 105                             sizeof(ni->ni_cpts[0] * ni->ni_ncpts));
 106         }
 107
 108 #ifndef __KERNEL__
 109 # ifdef HAVE_LIBPTHREAD
 110         pthread_mutex_destroy(&ni->ni_lock);
 111 # endif
 112 #endif
 113         LIBCFS_FREE(ni, sizeof(*ni));
 114 }
 115
 116 lnet_ni_t *
 117 lnet_ni_alloc(__u32 net, struct cfs_expr_list **el, cfs_list_t *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 == NULL) {
 132                 CERROR("Out of memory creating network %s\n",
 133                        libcfs_net2str(net));
 134                 return NULL;
 135         }
 136
 137 #ifdef __KERNEL__
 138         cfs_spin_lock_init(&ni->ni_lock);
 139 #else
 140 # ifdef HAVE_LIBPTHREAD
 141         pthread_mutex_init(&ni->ni_lock, NULL);
 142 # endif
 143 #endif
 144         CFS_INIT_LIST_HEAD(&ni->ni_cptlist);
 145         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 146                                        sizeof(*ni->ni_refs[0]));
 147         if (ni->ni_refs == NULL)
 148                 goto failed;
 149
 150         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 151                                             sizeof(*ni->ni_tx_queues[0]));
 152         if (ni->ni_tx_queues == NULL)
 153                 goto failed;
 154
 155         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 156                 CFS_INIT_LIST_HEAD(&tq->tq_delayed);
 157
 158         if (el == NULL || *el == NULL) {
 159                 ni->ni_cpts  = NULL;
 160                 ni->ni_ncpts = LNET_CPT_NUMBER;
 161         } else {
 162                 rc = cfs_expr_list_values(*el, LNET_CPT_NUMBER, &ni->ni_cpts);
 163                 if (rc <= 0) {
 164                         CERROR("Failed to set CPTs for NI %s: %d\n",
 165                                libcfs_net2str(net), rc);
 166                         goto failed;
 167                 }
 168
 169                 LASSERT(rc <= LNET_CPT_NUMBER);
 170                 if (rc == LNET_CPT_NUMBER) {
 171                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 172                         ni->ni_cpts = NULL;
 173                 }
 174
 175                 ni->ni_ncpts = rc;
 176                 cfs_expr_list_free(*el); /* consume it */
 177                 *el = NULL;
 178         }
 179
 180         /* LND will fill in the address part of the NID */
 181         ni->ni_nid = LNET_MKNID(net, 0);
 182         ni->ni_last_alive = cfs_time_current();
 183         cfs_list_add_tail(&ni->ni_list, nilist);
 184         return ni;
 185  failed:
 186         lnet_ni_free(ni);
 187         return NULL;
 188 }
 189
 190 int
 191 lnet_parse_networks(cfs_list_t *nilist, char *networks)
 192 {
 193         struct cfs_expr_list *el = NULL;
 194         int             tokensize = strlen(networks) + 1;
 195         char            *tokens;
 196         char            *str;
 197         char            *tmp;
 198         struct lnet_ni  *ni;
 199         __u32           net;
 200         int             nnets = 0;
 201
 202         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 203                 /* _WAY_ conservative */
 204                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 205                                    "long\n");
 206                 return -EINVAL;
 207         }
 208
 209         LIBCFS_ALLOC(tokens, tokensize);
 210         if (tokens == NULL) {
 211                 CERROR("Can't allocate net tokens\n");
 212                 return -ENOMEM;
 213         }
 214
 215         the_lnet.ln_network_tokens = tokens;
 216         the_lnet.ln_network_tokens_nob = tokensize;
 217         memcpy (tokens, networks, tokensize);
 218         str = tmp = tokens;
 219
 220         /* Add in the loopback network */
 221         ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist);
 222         if (ni == NULL)
 223                 goto failed;
 224
 225         while (str != NULL && *str != 0) {
 226                 char    *comma = strchr(str, ',');
 227                 char    *bracket = strchr(str, '(');
 228                 char    *square = strchr(str, '[');
 229                 char    *iface;
 230                 int     niface;
 231                 int     rc;
 232
 233                 /* NB we don't check interface conflicts here; it's the LNDs
 234                  * responsibility (if it cares at all) */
 235
 236                 if (square != NULL && (comma == NULL || square < comma)) {
 237                         /* i.e: o2ib0(ib0)[1,2], number between square
 238                          * brackets are CPTs this NI needs to be bond */
 239                         if (bracket != NULL && bracket > square) {
 240                                 tmp = square;
 241                                 goto failed_syntax;
 242                         }
 243
 244                         tmp = strchr(square, ']');
 245                         if (tmp == NULL) {
 246                                 tmp = square;
 247                                 goto failed_syntax;
 248                         }
 249
 250                         rc = cfs_expr_list_parse(square, tmp - square + 1,
 251                                                  0, LNET_CPT_NUMBER - 1, &el);
 252                         if (rc != 0) {
 253                                 tmp = square;
 254                                 goto failed_syntax;
 255                         }
 256
 257                         while (square <= tmp)
 258                                 *square++ = ' ';
 259                 }
 260
 261                 if (bracket == NULL ||
 262                     (comma != NULL && comma < bracket)) {
 263
 264                         /* no interface list specified */
 265
 266                         if (comma != NULL)
 267                                 *comma++ = 0;
 268                         net = libcfs_str2net(cfs_trimwhite(str));
 269
 270                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 271                                 LCONSOLE_ERROR_MSG(0x113, "Unrecognised network"
 272                                                    " type\n");
 273                                 tmp = str;
 274                                 goto failed_syntax;
 275                         }
 276
 277                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 278                             lnet_ni_alloc(net, &el, nilist) == NULL)
 279                                 goto failed;
 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                 nnets++;
 293                 ni = lnet_ni_alloc(net, &el, nilist);
 294                 if (ni == NULL)
 295                         goto failed;
 296
 297                 niface = 0;
 298                 iface = bracket + 1;
 299
 300                 bracket = strchr(iface, ')');
 301                 if (bracket == NULL) {
 302                         tmp = iface;
 303                         goto failed_syntax;
 304                 }
 305
 306                 *bracket = 0;
 307                 do {
 308                         comma = strchr(iface, ',');
 309                         if (comma != NULL)
 310                                 *comma++ = 0;
 311
 312                         iface = cfs_trimwhite(iface);
 313                         if (*iface == 0) {
 314                                 tmp = iface;
 315                                 goto failed_syntax;
 316                         }
 317
 318                         if (niface == LNET_MAX_INTERFACES) {
 319                                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 320                                                    "for net %s\n",
 321                                                    libcfs_net2str(net));
 322                                 goto failed;
 323                         }
 324
 325                         ni->ni_interfaces[niface++] = iface;
 326                         iface = comma;
 327                 } while (iface != NULL);
 328
 329                 str = bracket + 1;
 330                 comma = strchr(bracket + 1, ',');
 331                 if (comma != NULL) {
 332                         *comma = 0;
 333                         str = cfs_trimwhite(str);
 334                         if (*str != 0) {
 335                                 tmp = str;
 336                                 goto failed_syntax;
 337                         }
 338                         str = comma + 1;
 339                         continue;
 340                 }
 341
 342                 str = cfs_trimwhite(str);
 343                 if (*str != 0) {
 344                         tmp = str;
 345                         goto failed_syntax;
 346                 }
 347         }
 348
 349         LASSERT(!cfs_list_empty(nilist));
 350         return 0;
 351
 352  failed_syntax:
 353         lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
 354  failed:
 355         while (!cfs_list_empty(nilist)) {
 356                 ni = cfs_list_entry(nilist->next, lnet_ni_t, ni_list);
 357
 358                 cfs_list_del(&ni->ni_list);
 359                 lnet_ni_free(ni);
 360         }
 361
 362         if (el != NULL)
 363                 cfs_expr_list_free(el);
 364
 365         LIBCFS_FREE(tokens, tokensize);
 366         the_lnet.ln_network_tokens = NULL;
 367
 368         return -EINVAL;
 369 }
 370
 371 lnet_text_buf_t *
 372 lnet_new_text_buf (int str_len)
 373 {
 374         lnet_text_buf_t *ltb;
 375         int              nob;
 376
 377         /* NB allocate space for the terminating 0 */
 378         nob = offsetof(lnet_text_buf_t, ltb_text[str_len + 1]);
 379         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 380                 /* _way_ conservative for "route net gateway..." */
 381                 CERROR("text buffer too big\n");
 382                 return NULL;
 383         }
 384
 385         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 386                 CERROR("Too many text buffers\n");
 387                 return NULL;
 388         }
 389
 390         LIBCFS_ALLOC(ltb, nob);
 391         if (ltb == NULL)
 392                 return NULL;
 393
 394         ltb->ltb_size = nob;
 395         ltb->ltb_text[0] = 0;
 396         lnet_tbnob += nob;
 397         return ltb;
 398 }
 399
 400 void
 401 lnet_free_text_buf (lnet_text_buf_t *ltb)
 402 {
 403         lnet_tbnob -= ltb->ltb_size;
 404         LIBCFS_FREE(ltb, ltb->ltb_size);
 405 }
 406
 407 void
 408 lnet_free_text_bufs(cfs_list_t *tbs)
 409 {
 410         lnet_text_buf_t  *ltb;
 411
 412         while (!cfs_list_empty(tbs)) {
 413                 ltb = cfs_list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 414
 415                 cfs_list_del(&ltb->ltb_list);
 416                 lnet_free_text_buf(ltb);
 417         }
 418 }
 419
 420 void
 421 lnet_print_text_bufs(cfs_list_t *tbs)
 422 {
 423         cfs_list_t        *tmp;
 424         lnet_text_buf_t   *ltb;
 425
 426         cfs_list_for_each (tmp, tbs) {
 427                 ltb = cfs_list_entry(tmp, lnet_text_buf_t, ltb_list);
 428
 429                 CDEBUG(D_WARNING, "%s\n", ltb->ltb_text);
 430         }
 431
 432         CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob);
 433 }
 434
 435 int
 436 lnet_str2tbs_sep (cfs_list_t *tbs, char *str)
 437 {
 438         cfs_list_t        pending;
 439         char             *sep;
 440         int               nob;
 441         int               i;
 442         lnet_text_buf_t  *ltb;
 443
 444         CFS_INIT_LIST_HEAD(&pending);
 445
 446         /* Split 'str' into separate commands */
 447         for (;;) {
 448                 /* skip leading whitespace */
 449                 while (cfs_iswhite(*str))
 450                         str++;
 451
 452                 /* scan for separator or comment */
 453                 for (sep = str; *sep != 0; sep++)
 454                         if (lnet_issep(*sep) || *sep == '#')
 455                                 break;
 456
 457                 nob = (int)(sep - str);
 458                 if (nob > 0) {
 459                         ltb = lnet_new_text_buf(nob);
 460                         if (ltb == NULL) {
 461                                 lnet_free_text_bufs(&pending);
 462                                 return -1;
 463                         }
 464
 465                         for (i = 0; i < nob; i++)
 466                                 if (cfs_iswhite(str[i]))
 467                                         ltb->ltb_text[i] = ' ';
 468                                 else
 469                                         ltb->ltb_text[i] = str[i];
 470
 471                         ltb->ltb_text[nob] = 0;
 472
 473                         cfs_list_add_tail(&ltb->ltb_list, &pending);
 474                 }
 475
 476                 if (*sep == '#') {
 477                         /* scan for separator */
 478                         do {
 479                                 sep++;
 480                         } while (*sep != 0 && !lnet_issep(*sep));
 481                 }
 482
 483                 if (*sep == 0)
 484                         break;
 485
 486                 str = sep + 1;
 487         }
 488
 489         cfs_list_splice(&pending, tbs->prev);
 490         return 0;
 491 }
 492
 493 int
 494 lnet_expand1tb (cfs_list_t *list,
 495                char *str, char *sep1, char *sep2,
 496                char *item, int itemlen)
 497 {
 498         int              len1 = (int)(sep1 - str);
 499         int              len2 = strlen(sep2 + 1);
 500         lnet_text_buf_t *ltb;
 501
 502         LASSERT (*sep1 == '[');
 503         LASSERT (*sep2 == ']');
 504
 505         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 506         if (ltb == NULL)
 507                 return -ENOMEM;
 508
 509         memcpy(ltb->ltb_text, str, len1);
 510         memcpy(&ltb->ltb_text[len1], item, itemlen);
 511         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 512         ltb->ltb_text[len1 + itemlen + len2] = 0;
 513
 514         cfs_list_add_tail(&ltb->ltb_list, list);
 515         return 0;
 516 }
 517
 518 int
 519 lnet_str2tbs_expand (cfs_list_t *tbs, char *str)
 520 {
 521         char              num[16];
 522         cfs_list_t        pending;
 523         char             *sep;
 524         char             *sep2;
 525         char             *parsed;
 526         char             *enditem;
 527         int               lo;
 528         int               hi;
 529         int               stride;
 530         int               i;
 531         int               nob;
 532         int               scanned;
 533
 534         CFS_INIT_LIST_HEAD(&pending);
 535
 536         sep = strchr(str, '[');
 537         if (sep == NULL)                        /* nothing to expand */
 538                 return 0;
 539
 540         sep2 = strchr(sep, ']');
 541         if (sep2 == NULL)
 542                 goto failed;
 543
 544         for (parsed = sep; parsed < sep2; parsed = enditem) {
 545
 546                 enditem = ++parsed;
 547                 while (enditem < sep2 && *enditem != ',')
 548                         enditem++;
 549
 550                 if (enditem == parsed)          /* no empty items */
 551                         goto failed;
 552
 553                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
 554
 555                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 556
 557                                 /* simple string enumeration */
 558                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 559                                                    parsed, (int)(enditem - parsed)) != 0)
 560                                         goto failed;
 561
 562                                 continue;
 563                         }
 564
 565                         stride = 1;
 566                 }
 567
 568                 /* range expansion */
 569
 570                 if (enditem != parsed + scanned) /* no trailing junk */
 571                         goto failed;
 572
 573                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 574                     (hi - lo) % stride != 0)
 575                         goto failed;
 576
 577                 for (i = lo; i <= hi; i += stride) {
 578
 579                         snprintf(num, sizeof(num), "%d", i);
 580                         nob = strlen(num);
 581                         if (nob + 1 == sizeof(num))
 582                                 goto failed;
 583
 584                         if (lnet_expand1tb(&pending, str, sep, sep2,
 585                                            num, nob) != 0)
 586                                 goto failed;
 587                 }
 588         }
 589
 590         cfs_list_splice(&pending, tbs->prev);
 591         return 1;
 592
 593  failed:
 594         lnet_free_text_bufs(&pending);
 595         return -1;
 596 }
 597
 598 int
 599 lnet_parse_hops (char *str, unsigned int *hops)
 600 {
 601         int     len = strlen(str);
 602         int     nob = len;
 603
 604         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 605                 nob == len &&
 606                 *hops > 0 && *hops < 256);
 607 }
 608
 609
 610 int
 611 lnet_parse_route (char *str, int *im_a_router)
 612 {
 613         /* static scratch buffer OK (single threaded) */
 614         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 615
 616         cfs_list_t        nets;
 617         cfs_list_t        gateways;
 618         cfs_list_t       *tmp1;
 619         cfs_list_t       *tmp2;
 620         __u32             net;
 621         lnet_nid_t        nid;
 622         lnet_text_buf_t  *ltb;
 623         int               rc;
 624         char             *sep;
 625         char             *token = str;
 626         int               ntokens = 0;
 627         int               myrc = -1;
 628         unsigned int      hops;
 629         int               got_hops = 0;
 630
 631         CFS_INIT_LIST_HEAD(&gateways);
 632         CFS_INIT_LIST_HEAD(&nets);
 633
 634         /* save a copy of the string for error messages */
 635         strncpy(cmd, str, sizeof(cmd) - 1);
 636         cmd[sizeof(cmd) - 1] = 0;
 637
 638         sep = str;
 639         for (;;) {
 640                 /* scan for token start */
 641                 while (cfs_iswhite(*sep))
 642                         sep++;
 643                 if (*sep == 0) {
 644                         if (ntokens < (got_hops ? 3 : 2))
 645                                 goto token_error;
 646                         break;
 647                 }
 648
 649                 ntokens++;
 650                 token = sep++;
 651
 652                 /* scan for token end */
 653                 while (*sep != 0 && !cfs_iswhite(*sep))
 654                         sep++;
 655                 if (*sep != 0)
 656                         *sep++ = 0;
 657
 658                 if (ntokens == 1) {
 659                         tmp2 = &nets;           /* expanding nets */
 660                 } else if (ntokens == 2 &&
 661                            lnet_parse_hops(token, &hops)) {
 662                         got_hops = 1;           /* got a hop count */
 663                         continue;
 664                 } else {
 665                         tmp2 = &gateways;       /* expanding gateways */
 666                 }
 667
 668                 ltb = lnet_new_text_buf(strlen(token));
 669                 if (ltb == NULL)
 670                         goto out;
 671
 672                 strcpy(ltb->ltb_text, token);
 673                 tmp1 = &ltb->ltb_list;
 674                 cfs_list_add_tail(tmp1, tmp2);
 675
 676                 while (tmp1 != tmp2) {
 677                         ltb = cfs_list_entry(tmp1, lnet_text_buf_t, ltb_list);
 678
 679                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 680                         if (rc < 0)
 681                                 goto token_error;
 682
 683                         tmp1 = tmp1->next;
 684
 685                         if (rc > 0) {           /* expanded! */
 686                                 cfs_list_del(&ltb->ltb_list);
 687                                 lnet_free_text_buf(ltb);
 688                                 continue;
 689                         }
 690
 691                         if (ntokens == 1) {
 692                                 net = libcfs_str2net(ltb->ltb_text);
 693                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 694                                     LNET_NETTYP(net) == LOLND)
 695                                         goto token_error;
 696                         } else {
 697                                 nid = libcfs_str2nid(ltb->ltb_text);
 698                                 if (nid == LNET_NID_ANY ||
 699                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 700                                         goto token_error;
 701                         }
 702                 }
 703         }
 704
 705         if (!got_hops)
 706                 hops = 1;
 707
 708         LASSERT (!cfs_list_empty(&nets));
 709         LASSERT (!cfs_list_empty(&gateways));
 710
 711         cfs_list_for_each (tmp1, &nets) {
 712                 ltb = cfs_list_entry(tmp1, lnet_text_buf_t, ltb_list);
 713                 net = libcfs_str2net(ltb->ltb_text);
 714                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
 715
 716                 cfs_list_for_each (tmp2, &gateways) {
 717                         ltb = cfs_list_entry(tmp2, lnet_text_buf_t, ltb_list);
 718                         nid = libcfs_str2nid(ltb->ltb_text);
 719                         LASSERT (nid != LNET_NID_ANY);
 720
 721                         if (lnet_islocalnid(nid)) {
 722                                 *im_a_router = 1;
 723                                 continue;
 724                         }
 725
 726                         rc = lnet_add_route (net, hops, nid);
 727                         if (rc != 0) {
 728                                 CERROR("Can't create route "
 729                                        "to %s via %s\n",
 730                                        libcfs_net2str(net),
 731                                        libcfs_nid2str(nid));
 732                                 goto out;
 733                         }
 734                 }
 735         }
 736
 737         myrc = 0;
 738         goto out;
 739
 740  token_error:
 741         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 742  out:
 743         lnet_free_text_bufs(&nets);
 744         lnet_free_text_bufs(&gateways);
 745         return myrc;
 746 }
 747
 748 int
 749 lnet_parse_route_tbs(cfs_list_t *tbs, int *im_a_router)
 750 {
 751         lnet_text_buf_t   *ltb;
 752
 753         while (!cfs_list_empty(tbs)) {
 754                 ltb = cfs_list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 755
 756                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 757                         lnet_free_text_bufs(tbs);
 758                         return -EINVAL;
 759                 }
 760
 761                 cfs_list_del(&ltb->ltb_list);
 762                 lnet_free_text_buf(ltb);
 763         }
 764
 765         return 0;
 766 }
 767
 768 int
 769 lnet_parse_routes (char *routes, int *im_a_router)
 770 {
 771         cfs_list_t        tbs;
 772         int               rc = 0;
 773
 774         *im_a_router = 0;
 775
 776         CFS_INIT_LIST_HEAD(&tbs);
 777
 778         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 779                 CERROR("Error parsing routes\n");
 780                 rc = -EINVAL;
 781         } else {
 782                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 783         }
 784
 785         LASSERT (lnet_tbnob == 0);
 786         return rc;
 787 }
 788
 789 int
 790 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 791 {
 792         CFS_LIST_HEAD   (list);
 793         int             rc;
 794         int             i;
 795
 796         rc = cfs_ip_addr_parse(token, len, &list);
 797         if (rc != 0)
 798                 return rc;
 799
 800         for (rc = i = 0; !rc && i < nip; i++)
 801                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 802
 803         cfs_ip_addr_free(&list);
 804
 805         return rc;
 806 }
 807
 808 int
 809 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 810 {
 811         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 812
 813         int   matched = 0;
 814         int   ntokens = 0;
 815         int   len;
 816         char *net = NULL;
 817         char *sep;
 818         char *token;
 819         int   rc;
 820
 821         LASSERT (strlen(net_entry) < sizeof(tokens));
 822
 823         /* work on a copy of the string */
 824         strcpy(tokens, net_entry);
 825         sep = tokens;
 826         for (;;) {
 827                 /* scan for token start */
 828                 while (cfs_iswhite(*sep))
 829                         sep++;
 830                 if (*sep == 0)
 831                         break;
 832
 833                 token = sep++;
 834
 835                 /* scan for token end */
 836                 while (*sep != 0 && !cfs_iswhite(*sep))
 837                         sep++;
 838                 if (*sep != 0)
 839                         *sep++ = 0;
 840
 841                 if (ntokens++ == 0) {
 842                         net = token;
 843                         continue;
 844                 }
 845
 846                 len = strlen(token);
 847
 848                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 849                 if (rc < 0) {
 850                         lnet_syntax("ip2nets", net_entry,
 851                                     (int)(token - tokens), len);
 852                         return rc;
 853                 }
 854
 855                 matched |= (rc != 0);
 856         }
 857
 858         if (!matched)
 859                 return 0;
 860
 861         strcpy(net_entry, net);                 /* replace with matched net */
 862         return 1;
 863 }
 864
 865 __u32
 866 lnet_netspec2net(char *netspec)
 867 {
 868         char   *bracket = strchr(netspec, '(');
 869         __u32   net;
 870
 871         if (bracket != NULL)
 872                 *bracket = 0;
 873
 874         net = libcfs_str2net(netspec);
 875
 876         if (bracket != NULL)
 877                 *bracket = '(';
 878
 879         return net;
 880 }
 881
 882 int
 883 lnet_splitnets(char *source, cfs_list_t *nets)
 884 {
 885         int               offset = 0;
 886         int               offset2;
 887         int               len;
 888         lnet_text_buf_t  *tb;
 889         lnet_text_buf_t  *tb2;
 890         cfs_list_t       *t;
 891         char             *sep;
 892         char             *bracket;
 893         __u32             net;
 894
 895         LASSERT (!cfs_list_empty(nets));
 896         LASSERT (nets->next == nets->prev);     /* single entry */
 897
 898         tb = cfs_list_entry(nets->next, lnet_text_buf_t, ltb_list);
 899
 900         for (;;) {
 901                 sep = strchr(tb->ltb_text, ',');
 902                 bracket = strchr(tb->ltb_text, '(');
 903
 904                 if (sep != NULL &&
 905                     bracket != NULL &&
 906                     bracket < sep) {
 907                         /* netspec lists interfaces... */
 908
 909                         offset2 = offset + (int)(bracket - tb->ltb_text);
 910                         len = strlen(bracket);
 911
 912                         bracket = strchr(bracket + 1, ')');
 913
 914                         if (bracket == NULL ||
 915                             !(bracket[1] == ',' || bracket[1] == 0)) {
 916                                 lnet_syntax("ip2nets", source, offset2, len);
 917                                 return -EINVAL;
 918                         }
 919
 920                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
 921                 }
 922
 923                 if (sep != NULL)
 924                         *sep++ = 0;
 925
 926                 net = lnet_netspec2net(tb->ltb_text);
 927                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 928                         lnet_syntax("ip2nets", source, offset,
 929                                     strlen(tb->ltb_text));
 930                         return -EINVAL;
 931                 }
 932
 933                 cfs_list_for_each(t, nets) {
 934                         tb2 = cfs_list_entry(t, lnet_text_buf_t, ltb_list);
 935
 936                         if (tb2 == tb)
 937                                 continue;
 938
 939                         if (net == lnet_netspec2net(tb2->ltb_text)) {
 940                                 /* duplicate network */
 941                                 lnet_syntax("ip2nets", source, offset,
 942                                             strlen(tb->ltb_text));
 943                                 return -EINVAL;
 944                         }
 945                 }
 946
 947                 if (sep == NULL)
 948                         return 0;
 949
 950                 offset += (int)(sep - tb->ltb_text);
 951                 tb2 = lnet_new_text_buf(strlen(sep));
 952                 if (tb2 == NULL)
 953                         return -ENOMEM;
 954
 955                 strcpy(tb2->ltb_text, sep);
 956                 cfs_list_add_tail(&tb2->ltb_list, nets);
 957
 958                 tb = tb2;
 959         }
 960 }
 961
 962 int
 963 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
 964 {
 965         static char        networks[LNET_SINGLE_TEXTBUF_NOB];
 966         static char        source[LNET_SINGLE_TEXTBUF_NOB];
 967
 968         cfs_list_t          raw_entries;
 969         cfs_list_t          matched_nets;
 970         cfs_list_t          current_nets;
 971         cfs_list_t         *t;
 972         cfs_list_t         *t2;
 973         lnet_text_buf_t    *tb;
 974         lnet_text_buf_t    *tb2;
 975         __u32               net1;
 976         __u32               net2;
 977         int                 len;
 978         int                 count;
 979         int                 dup;
 980         int                 rc;
 981
 982         CFS_INIT_LIST_HEAD(&raw_entries);
 983         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
 984                 CERROR("Error parsing ip2nets\n");
 985                 LASSERT (lnet_tbnob == 0);
 986                 return -EINVAL;
 987         }
 988
 989         CFS_INIT_LIST_HEAD(&matched_nets);
 990         CFS_INIT_LIST_HEAD(&current_nets);
 991         networks[0] = 0;
 992         count = 0;
 993         len = 0;
 994         rc = 0;
 995
 996         while (!cfs_list_empty(&raw_entries)) {
 997                 tb = cfs_list_entry(raw_entries.next, lnet_text_buf_t,
 998                                     ltb_list);
 999
1000                 strncpy(source, tb->ltb_text, sizeof(source)-1);
1001                 source[sizeof(source)-1] = 0;
1002
1003                 /* replace ltb_text with the network(s) add on match */
1004                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1005                 if (rc < 0)
1006                         break;
1007
1008                 cfs_list_del(&tb->ltb_list);
1009
1010                 if (rc == 0) {                  /* no match */
1011                         lnet_free_text_buf(tb);
1012                         continue;
1013                 }
1014
1015                 /* split into separate networks */
1016                 CFS_INIT_LIST_HEAD(&current_nets);
1017                 cfs_list_add(&tb->ltb_list, &current_nets);
1018                 rc = lnet_splitnets(source, &current_nets);
1019                 if (rc < 0)
1020                         break;
1021
1022                 dup = 0;
1023                 cfs_list_for_each (t, &current_nets) {
1024                         tb = cfs_list_entry(t, lnet_text_buf_t, ltb_list);
1025                         net1 = lnet_netspec2net(tb->ltb_text);
1026                         LASSERT (net1 != LNET_NIDNET(LNET_NID_ANY));
1027
1028                         cfs_list_for_each(t2, &matched_nets) {
1029                                 tb2 = cfs_list_entry(t2, lnet_text_buf_t,
1030                                                      ltb_list);
1031                                 net2 = lnet_netspec2net(tb2->ltb_text);
1032                                 LASSERT (net2 != LNET_NIDNET(LNET_NID_ANY));
1033
1034                                 if (net1 == net2) {
1035                                         dup = 1;
1036                                         break;
1037                                 }
1038                         }
1039
1040                         if (dup)
1041                                 break;
1042                 }
1043
1044                 if (dup) {
1045                         lnet_free_text_bufs(&current_nets);
1046                         continue;
1047                 }
1048
1049                 cfs_list_for_each_safe(t, t2, &current_nets) {
1050                         tb = cfs_list_entry(t, lnet_text_buf_t, ltb_list);
1051
1052                         cfs_list_del(&tb->ltb_list);
1053                         cfs_list_add_tail(&tb->ltb_list, &matched_nets);
1054
1055                         len += snprintf(networks + len, sizeof(networks) - len,
1056                                         "%s%s", (len == 0) ? "" : ",",
1057                                         tb->ltb_text);
1058
1059                         if (len >= sizeof(networks)) {
1060                                 CERROR("Too many matched networks\n");
1061                                 rc = -E2BIG;
1062                                 goto out;
1063                         }
1064                 }
1065
1066                 count++;
1067         }
1068
1069  out:
1070         lnet_free_text_bufs(&raw_entries);
1071         lnet_free_text_bufs(&matched_nets);
1072         lnet_free_text_bufs(&current_nets);
1073         LASSERT (lnet_tbnob == 0);
1074
1075         if (rc < 0)
1076                 return rc;
1077
1078         *networksp = networks;
1079         return count;
1080 }
1081
1082 #ifdef __KERNEL__
1083 void
1084 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1085 {
1086         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1087 }
1088
1089 int
1090 lnet_ipaddr_enumerate (__u32 **ipaddrsp)
1091 {
1092         int        up;
1093         __u32      netmask;
1094         __u32     *ipaddrs;
1095         __u32     *ipaddrs2;
1096         int        nip;
1097         char     **ifnames;
1098         int        nif = libcfs_ipif_enumerate(&ifnames);
1099         int        i;
1100         int        rc;
1101
1102         if (nif <= 0)
1103                 return nif;
1104
1105         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1106         if (ipaddrs == NULL) {
1107                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1108                 libcfs_ipif_free_enumeration(ifnames, nif);
1109                 return -ENOMEM;
1110         }
1111
1112         for (i = nip = 0; i < nif; i++) {
1113                 if (!strcmp(ifnames[i], "lo"))
1114                         continue;
1115
1116                 rc = libcfs_ipif_query(ifnames[i], &up,
1117                                        &ipaddrs[nip], &netmask);
1118                 if (rc != 0) {
1119                         CWARN("Can't query interface %s: %d\n",
1120                               ifnames[i], rc);
1121                         continue;
1122                 }
1123
1124                 if (!up) {
1125                         CWARN("Ignoring interface %s: it's down\n",
1126                               ifnames[i]);
1127                         continue;
1128                 }
1129
1130                 nip++;
1131         }
1132
1133         libcfs_ipif_free_enumeration(ifnames, nif);
1134
1135         if (nip == nif) {
1136                 *ipaddrsp = ipaddrs;
1137         } else {
1138                 if (nip > 0) {
1139                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1140                         if (ipaddrs2 == NULL) {
1141                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1142                                 nip = -ENOMEM;
1143                         } else {
1144                                 memcpy(ipaddrs2, ipaddrs,
1145                                        nip * sizeof(*ipaddrs));
1146                                 *ipaddrsp = ipaddrs2;
1147                                 rc = nip;
1148                         }
1149                 }
1150                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1151         }
1152         return nip;
1153 }
1154
1155 int
1156 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1157 {
1158         __u32     *ipaddrs;
1159         int        nip = lnet_ipaddr_enumerate(&ipaddrs);
1160         int        rc;
1161
1162         if (nip < 0) {
1163                 LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP "
1164                                    "interfaces for ip2nets to match\n", nip);
1165                 return nip;
1166         }
1167
1168         if (nip == 0) {
1169                 LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces "
1170                                    "for ip2nets to match\n");
1171                 return -ENOENT;
1172         }
1173
1174         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1175         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1176
1177         if (rc < 0) {
1178                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1179                 return rc;
1180         }
1181
1182         if (rc == 0) {
1183                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1184                                    "any local IP interfaces\n");
1185                 return -ENOENT;
1186         }
1187
1188         return 0;
1189 }
1190
1191 int
1192 lnet_set_ip_niaddr (lnet_ni_t *ni)
1193 {
1194         __u32  net = LNET_NIDNET(ni->ni_nid);
1195         char **names;
1196         int    n;
1197         __u32  ip;
1198         __u32  netmask;
1199         int    up;
1200         int    i;
1201         int    rc;
1202
1203         /* Convenience for LNDs that use the IP address of a local interface as
1204          * the local address part of their NID */
1205
1206         if (ni->ni_interfaces[0] != NULL) {
1207
1208                 CLASSERT (LNET_MAX_INTERFACES > 1);
1209
1210                 if (ni->ni_interfaces[1] != NULL) {
1211                         CERROR("Net %s doesn't support multiple interfaces\n",
1212                                libcfs_net2str(net));
1213                         return -EPERM;
1214                 }
1215
1216                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1217                                        &up, &ip, &netmask);
1218                 if (rc != 0) {
1219                         CERROR("Net %s can't query interface %s: %d\n",
1220                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1221                         return -EPERM;
1222                 }
1223
1224                 if (!up) {
1225                         CERROR("Net %s can't use interface %s: it's down\n",
1226                                libcfs_net2str(net), ni->ni_interfaces[0]);
1227                         return -ENETDOWN;
1228                 }
1229
1230                 ni->ni_nid = LNET_MKNID(net, ip);
1231                 return 0;
1232         }
1233
1234         n = libcfs_ipif_enumerate(&names);
1235         if (n <= 0) {
1236                 CERROR("Net %s can't enumerate interfaces: %d\n",
1237                        libcfs_net2str(net), n);
1238                 return 0;
1239         }
1240
1241         for (i = 0; i < n; i++) {
1242                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1243                         continue;
1244
1245                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1246
1247                 if (rc != 0) {
1248                         CWARN("Net %s can't query interface %s: %d\n",
1249                               libcfs_net2str(net), names[i], rc);
1250                         continue;
1251                 }
1252
1253                 if (!up) {
1254                         CWARN("Net %s ignoring interface %s (down)\n",
1255                               libcfs_net2str(net), names[i]);
1256                         continue;
1257                 }
1258
1259                 libcfs_ipif_free_enumeration(names, n);
1260                 ni->ni_nid = LNET_MKNID(net, ip);
1261                 return 0;
1262         }
1263
1264         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1265         libcfs_ipif_free_enumeration(names, n);
1266         return -ENOENT;
1267 }
1268 EXPORT_SYMBOL(lnet_set_ip_niaddr);
1269
1270 #endif