lnet/lnet/config.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see [sun.com URL with a
  20  * copy of GPLv2].
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 <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 = 0;                      /* track text buf allocation */
  47 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  48 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  49
  50 typedef struct {
  51         struct list_head   lre_list;            /* stash in a list */
  52         int                lre_min;             /* min value */
  53         int                lre_max;             /* max value */
  54         int                lre_stride;          /* stride */
  55 } lnet_range_expr_t;
  56
  57 static int lnet_re_alloc = 0;                   /* track expr allocation */
  58
  59 void
  60 lnet_syntax(char *name, char *str, int offset, int width)
  61 {
  62         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  63         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  64
  65         memset(dots, '.', sizeof(dots));
  66         dots[sizeof(dots)-1] = 0;
  67         memset(dashes, '-', sizeof(dashes));
  68         dashes[sizeof(dashes)-1] = 0;
  69
  70         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  71         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  72                            (int)strlen(name), dots, offset, dots,
  73                             (width < 1) ? 0 : width - 1, dashes);
  74 }
  75
  76 int
  77 lnet_issep (char c)
  78 {
  79         switch (c) {
  80         case '\n':
  81         case '\r':
  82         case ';':
  83                 return 1;
  84         default:
  85                 return 0;
  86         }
  87 }
  88
  89 int
  90 lnet_iswhite (char c)
  91 {
  92         switch (c) {
  93         case ' ':
  94         case '\t':
  95         case '\n':
  96         case '\r':
  97                 return 1;
  98         default:
  99                 return 0;
 100         }
 101 }
 102
 103 char *
 104 lnet_trimwhite(char *str)
 105 {
 106         char *end;
 107
 108         while (lnet_iswhite(*str))
 109                 str++;
 110
 111         end = str + strlen(str);
 112         while (end > str) {
 113                 if (!lnet_iswhite(end[-1]))
 114                         break;
 115                 end--;
 116         }
 117
 118         *end = 0;
 119         return str;
 120 }
 121
 122 int
 123 lnet_net_unique(__u32 net, struct list_head *nilist)
 124 {
 125         struct list_head *tmp;
 126         lnet_ni_t        *ni;
 127
 128         list_for_each (tmp, nilist) {
 129                 ni = list_entry(tmp, lnet_ni_t, ni_list);
 130
 131                 if (LNET_NIDNET(ni->ni_nid) == net)
 132                         return 0;
 133         }
 134
 135         return 1;
 136 }
 137
 138 lnet_ni_t *
 139 lnet_new_ni(__u32 net, struct list_head *nilist)
 140 {
 141         lnet_ni_t *ni;
 142
 143         if (!lnet_net_unique(net, nilist)) {
 144                 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
 145                                    libcfs_net2str(net));
 146                 return NULL;
 147         }
 148
 149         LIBCFS_ALLOC(ni, sizeof(*ni));
 150         if (ni == NULL) {
 151                 CERROR("Out of memory creating network %s\n",
 152                        libcfs_net2str(net));
 153                 return NULL;
 154         }
 155
 156         /* zero counters/flags, NULL pointers... */
 157         memset(ni, 0, sizeof(*ni));
 158
 159         /* LND will fill in the address part of the NID */
 160         ni->ni_nid = LNET_MKNID(net, 0);
 161         CFS_INIT_LIST_HEAD(&ni->ni_txq);
 162
 163         list_add_tail(&ni->ni_list, nilist);
 164         return ni;
 165 }
 166
 167 int
 168 lnet_parse_networks(struct list_head *nilist, char *networks)
 169 {
 170         int        tokensize = strlen(networks) + 1;
 171         char      *tokens;
 172         char      *str;
 173         lnet_ni_t *ni;
 174         __u32      net;
 175         int        nnets = 0;
 176
 177         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 178                 /* _WAY_ conservative */
 179                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 180                                    "long\n");
 181                 return -EINVAL;
 182         }
 183
 184         LIBCFS_ALLOC(tokens, tokensize);
 185         if (tokens == NULL) {
 186                 CERROR("Can't allocate net tokens\n");
 187                 return -ENOMEM;
 188         }
 189
 190         the_lnet.ln_network_tokens = tokens;
 191         the_lnet.ln_network_tokens_nob = tokensize;
 192         memcpy (tokens, networks, tokensize);
 193         str = tokens;
 194
 195         /* Add in the loopback network */
 196         ni = lnet_new_ni(LNET_MKNET(LOLND, 0), nilist);
 197         if (ni == NULL)
 198                 goto failed;
 199
 200         while (str != NULL && *str != 0) {
 201                 char      *comma = strchr(str, ',');
 202                 char      *bracket = strchr(str, '(');
 203                 int        niface;
 204                 char      *iface;
 205
 206                 /* NB we don't check interface conflicts here; it's the LNDs
 207                  * responsibility (if it cares at all) */
 208
 209                 if (bracket == NULL ||
 210                     (comma != NULL && comma < bracket)) {
 211
 212                         /* no interface list specified */
 213
 214                         if (comma != NULL)
 215                                 *comma++ = 0;
 216                         net = libcfs_str2net(lnet_trimwhite(str));
 217
 218                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 219                                 lnet_syntax("networks", networks,
 220                                             str - tokens, strlen(str));
 221                                 LCONSOLE_ERROR_MSG(0x113, "Unrecognised network"
 222                                                    " type\n");
 223                                 goto failed;
 224                         }
 225
 226                         if (LNET_NETTYP(net) != LOLND && /* loopback is implicit */
 227                             lnet_new_ni(net, nilist) == NULL)
 228                                 goto failed;
 229
 230                         str = comma;
 231                         continue;
 232                 }
 233
 234                 *bracket = 0;
 235                 net = libcfs_str2net(lnet_trimwhite(str));
 236                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 237                         lnet_syntax("networks", networks,
 238                                     str - tokens, strlen(str));
 239                         goto failed;
 240                 }
 241
 242                 if (nnets > 0 &&
 243                     the_lnet.ln_ptlcompat > 0) {
 244                         LCONSOLE_ERROR_MSG(0x114, "Only 1 network supported when"
 245                                            " 'portals_compatible' is set\n");
 246                         goto failed;
 247                 }
 248
 249                 nnets++;
 250                 ni = lnet_new_ni(net, nilist);
 251                 if (ni == NULL)
 252                         goto failed;
 253
 254                 niface = 0;
 255                 iface = bracket + 1;
 256
 257                 bracket = strchr(iface, ')');
 258                 if (bracket == NULL) {
 259                         lnet_syntax("networks", networks,
 260                                     iface - tokens, strlen(iface));
 261                         goto failed;
 262                 }
 263
 264                 *bracket = 0;
 265                 do {
 266                         comma = strchr(iface, ',');
 267                         if (comma != NULL)
 268                                 *comma++ = 0;
 269
 270                         iface = lnet_trimwhite(iface);
 271                         if (*iface == 0) {
 272                                 lnet_syntax("networks", networks,
 273                                             iface - tokens, strlen(iface));
 274                                 goto failed;
 275                         }
 276
 277                         if (niface == LNET_MAX_INTERFACES) {
 278                                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 279                                                    "for net %s\n",
 280                                                    libcfs_net2str(net));
 281                                 goto failed;
 282                         }
 283
 284                         ni->ni_interfaces[niface++] = iface;
 285                         iface = comma;
 286                 } while (iface != NULL);
 287
 288                 str = bracket + 1;
 289                 comma = strchr(bracket + 1, ',');
 290                 if (comma != NULL) {
 291                         *comma = 0;
 292                         str = lnet_trimwhite(str);
 293                         if (*str != 0) {
 294                                 lnet_syntax("networks", networks,
 295                                             str - tokens, strlen(str));
 296                                 goto failed;
 297                         }
 298                         str = comma + 1;
 299                         continue;
 300                 }
 301
 302                 str = lnet_trimwhite(str);
 303                 if (*str != 0) {
 304                         lnet_syntax("networks", networks,
 305                                     str - tokens, strlen(str));
 306                         goto failed;
 307                 }
 308         }
 309
 310         LASSERT (!list_empty(nilist));
 311         return 0;
 312
 313  failed:
 314         while (!list_empty(nilist)) {
 315                 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
 316
 317                 list_del(&ni->ni_list);
 318                 LIBCFS_FREE(ni, sizeof(*ni));
 319         }
 320         LIBCFS_FREE(tokens, tokensize);
 321         the_lnet.ln_network_tokens = NULL;
 322
 323         return -EINVAL;
 324 }
 325
 326 lnet_text_buf_t *
 327 lnet_new_text_buf (int str_len)
 328 {
 329         lnet_text_buf_t *ltb;
 330         int              nob;
 331
 332         /* NB allocate space for the terminating 0 */
 333         nob = offsetof(lnet_text_buf_t, ltb_text[str_len + 1]);
 334         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 335                 /* _way_ conservative for "route net gateway..." */
 336                 CERROR("text buffer too big\n");
 337                 return NULL;
 338         }
 339
 340         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 341                 CERROR("Too many text buffers\n");
 342                 return NULL;
 343         }
 344
 345         LIBCFS_ALLOC(ltb, nob);
 346         if (ltb == NULL)
 347                 return NULL;
 348
 349         ltb->ltb_size = nob;
 350         ltb->ltb_text[0] = 0;
 351         lnet_tbnob += nob;
 352         return ltb;
 353 }
 354
 355 void
 356 lnet_free_text_buf (lnet_text_buf_t *ltb)
 357 {
 358         lnet_tbnob -= ltb->ltb_size;
 359         LIBCFS_FREE(ltb, ltb->ltb_size);
 360 }
 361
 362 void
 363 lnet_free_text_bufs(struct list_head *tbs)
 364 {
 365         lnet_text_buf_t  *ltb;
 366
 367         while (!list_empty(tbs)) {
 368                 ltb = list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 369
 370                 list_del(&ltb->ltb_list);
 371                 lnet_free_text_buf(ltb);
 372         }
 373 }
 374
 375 void
 376 lnet_print_text_bufs(struct list_head *tbs)
 377 {
 378         struct list_head  *tmp;
 379         lnet_text_buf_t   *ltb;
 380
 381         list_for_each (tmp, tbs) {
 382                 ltb = list_entry(tmp, lnet_text_buf_t, ltb_list);
 383
 384                 CDEBUG(D_WARNING, "%s\n", ltb->ltb_text);
 385         }
 386
 387         CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob);
 388 }
 389
 390 int
 391 lnet_str2tbs_sep (struct list_head *tbs, char *str)
 392 {
 393         struct list_head  pending;
 394         char             *sep;
 395         int               nob;
 396         int               i;
 397         lnet_text_buf_t  *ltb;
 398
 399         CFS_INIT_LIST_HEAD(&pending);
 400
 401         /* Split 'str' into separate commands */
 402         for (;;) {
 403                 /* skip leading whitespace */
 404                 while (lnet_iswhite(*str))
 405                         str++;
 406
 407                 /* scan for separator or comment */
 408                 for (sep = str; *sep != 0; sep++)
 409                         if (lnet_issep(*sep) || *sep == '#')
 410                                 break;
 411
 412                 nob = sep - str;
 413                 if (nob > 0) {
 414                         ltb = lnet_new_text_buf(nob);
 415                         if (ltb == NULL) {
 416                                 lnet_free_text_bufs(&pending);
 417                                 return -1;
 418                         }
 419
 420                         for (i = 0; i < nob; i++)
 421                                 if (lnet_iswhite(str[i]))
 422                                         ltb->ltb_text[i] = ' ';
 423                                 else
 424                                         ltb->ltb_text[i] = str[i];
 425
 426                         ltb->ltb_text[nob] = 0;
 427
 428                         list_add_tail(&ltb->ltb_list, &pending);
 429                 }
 430
 431                 if (*sep == '#') {
 432                         /* scan for separator */
 433                         do {
 434                                 sep++;
 435                         } while (*sep != 0 && !lnet_issep(*sep));
 436                 }
 437
 438                 if (*sep == 0)
 439                         break;
 440
 441                 str = sep + 1;
 442         }
 443
 444         list_splice(&pending, tbs->prev);
 445         return 0;
 446 }
 447
 448 int
 449 lnet_expand1tb (struct list_head *list,
 450                char *str, char *sep1, char *sep2,
 451                char *item, int itemlen)
 452 {
 453         int              len1 = sep1 - str;
 454         int              len2 = strlen(sep2 + 1);
 455         lnet_text_buf_t *ltb;
 456
 457         LASSERT (*sep1 == '[');
 458         LASSERT (*sep2 == ']');
 459
 460         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 461         if (ltb == NULL)
 462                 return -ENOMEM;
 463
 464         memcpy(ltb->ltb_text, str, len1);
 465         memcpy(&ltb->ltb_text[len1], item, itemlen);
 466         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 467         ltb->ltb_text[len1 + itemlen + len2] = 0;
 468
 469         list_add_tail(&ltb->ltb_list, list);
 470         return 0;
 471 }
 472
 473 int
 474 lnet_str2tbs_expand (struct list_head *tbs, char *str)
 475 {
 476         char              num[16];
 477         struct list_head  pending;
 478         char             *sep;
 479         char             *sep2;
 480         char             *parsed;
 481         char             *enditem;
 482         int               lo;
 483         int               hi;
 484         int               stride;
 485         int               i;
 486         int               nob;
 487         int               scanned;
 488
 489         CFS_INIT_LIST_HEAD(&pending);
 490
 491         sep = strchr(str, '[');
 492         if (sep == NULL)                        /* nothing to expand */
 493                 return 0;
 494
 495         sep2 = strchr(sep, ']');
 496         if (sep2 == NULL)
 497                 goto failed;
 498
 499         for (parsed = sep; parsed < sep2; parsed = enditem) {
 500
 501                 enditem = ++parsed;
 502                 while (enditem < sep2 && *enditem != ',')
 503                         enditem++;
 504
 505                 if (enditem == parsed)          /* no empty items */
 506                         goto failed;
 507
 508                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
 509
 510                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 511
 512                                 /* simple string enumeration */
 513                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 514                                                    parsed, enditem - parsed) != 0)
 515                                         goto failed;
 516
 517                                 continue;
 518                         }
 519
 520                         stride = 1;
 521                 }
 522
 523                 /* range expansion */
 524
 525                 if (enditem != parsed + scanned) /* no trailing junk */
 526                         goto failed;
 527
 528                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 529                     (hi - lo) % stride != 0)
 530                         goto failed;
 531
 532                 for (i = lo; i <= hi; i += stride) {
 533
 534                         snprintf(num, sizeof(num), "%d", i);
 535                         nob = strlen(num);
 536                         if (nob + 1 == sizeof(num))
 537                                 goto failed;
 538
 539                         if (lnet_expand1tb(&pending, str, sep, sep2,
 540                                            num, nob) != 0)
 541                                 goto failed;
 542                 }
 543         }
 544
 545         list_splice(&pending, tbs->prev);
 546         return 1;
 547
 548  failed:
 549         lnet_free_text_bufs(&pending);
 550         return -1;
 551 }
 552
 553 int
 554 lnet_parse_hops (char *str, unsigned int *hops)
 555 {
 556         int     len = strlen(str);
 557         int     nob = len;
 558
 559         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 560                 nob == len &&
 561                 *hops > 0 && *hops < 256);
 562 }
 563
 564
 565 int
 566 lnet_parse_route (char *str, int *im_a_router)
 567 {
 568         /* static scratch buffer OK (single threaded) */
 569         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 570
 571         struct list_head  nets;
 572         struct list_head  gateways;
 573         struct list_head *tmp1;
 574         struct list_head *tmp2;
 575         __u32             net;
 576         lnet_nid_t        nid;
 577         lnet_text_buf_t  *ltb;
 578         int               rc;
 579         char             *sep;
 580         char             *token = str;
 581         int               ntokens = 0;
 582         int               myrc = -1;
 583         unsigned int      hops;
 584         int               got_hops = 0;
 585
 586         CFS_INIT_LIST_HEAD(&gateways);
 587         CFS_INIT_LIST_HEAD(&nets);
 588
 589         /* save a copy of the string for error messages */
 590         strncpy(cmd, str, sizeof(cmd) - 1);
 591         cmd[sizeof(cmd) - 1] = 0;
 592
 593         sep = str;
 594         for (;;) {
 595                 /* scan for token start */
 596                 while (lnet_iswhite(*sep))
 597                         sep++;
 598                 if (*sep == 0) {
 599                         if (ntokens < (got_hops ? 3 : 2))
 600                                 goto token_error;
 601                         break;
 602                 }
 603
 604                 ntokens++;
 605                 token = sep++;
 606
 607                 /* scan for token end */
 608                 while (*sep != 0 && !lnet_iswhite(*sep))
 609                         sep++;
 610                 if (*sep != 0)
 611                         *sep++ = 0;
 612
 613                 if (ntokens == 1) {
 614                         tmp2 = &nets;           /* expanding nets */
 615                 } else if (ntokens == 2 &&
 616                            lnet_parse_hops(token, &hops)) {
 617                         got_hops = 1;           /* got a hop count */
 618                         continue;
 619                 } else {
 620                         tmp2 = &gateways;       /* expanding gateways */
 621                 }
 622
 623                 ltb = lnet_new_text_buf(strlen(token));
 624                 if (ltb == NULL)
 625                         goto out;
 626
 627                 strcpy(ltb->ltb_text, token);
 628                 tmp1 = &ltb->ltb_list;
 629                 list_add_tail(tmp1, tmp2);
 630
 631                 while (tmp1 != tmp2) {
 632                         ltb = list_entry(tmp1, lnet_text_buf_t, ltb_list);
 633
 634                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 635                         if (rc < 0)
 636                                 goto token_error;
 637
 638                         tmp1 = tmp1->next;
 639
 640                         if (rc > 0) {           /* expanded! */
 641                                 list_del(&ltb->ltb_list);
 642                                 lnet_free_text_buf(ltb);
 643                                 continue;
 644                         }
 645
 646                         if (ntokens == 1) {
 647                                 net = libcfs_str2net(ltb->ltb_text);
 648                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 649                                     LNET_NETTYP(net) == LOLND)
 650                                         goto token_error;
 651                         } else {
 652                                 nid = libcfs_str2nid(ltb->ltb_text);
 653                                 if (nid == LNET_NID_ANY ||
 654                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 655                                         goto token_error;
 656                         }
 657                 }
 658         }
 659
 660         if (!got_hops)
 661                 hops = 1;
 662
 663         LASSERT (!list_empty(&nets));
 664         LASSERT (!list_empty(&gateways));
 665
 666         list_for_each (tmp1, &nets) {
 667                 ltb = list_entry(tmp1, lnet_text_buf_t, ltb_list);
 668                 net = libcfs_str2net(ltb->ltb_text);
 669                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
 670
 671                 list_for_each (tmp2, &gateways) {
 672                         ltb = list_entry(tmp2, lnet_text_buf_t, ltb_list);
 673                         nid = libcfs_str2nid(ltb->ltb_text);
 674                         LASSERT (nid != LNET_NID_ANY);
 675
 676                         if (lnet_islocalnid(nid)) {
 677                                 *im_a_router = 1;
 678                                 continue;
 679                         }
 680
 681                         rc = lnet_add_route (net, hops, nid);
 682                         if (rc != 0) {
 683                                 CERROR("Can't create route "
 684                                        "to %s via %s\n",
 685                                        libcfs_net2str(net),
 686                                        libcfs_nid2str(nid));
 687                                 goto out;
 688                         }
 689                 }
 690         }
 691
 692         myrc = 0;
 693         goto out;
 694
 695  token_error:
 696         lnet_syntax("routes", cmd, token - str, strlen(token));
 697  out:
 698         lnet_free_text_bufs(&nets);
 699         lnet_free_text_bufs(&gateways);
 700         return myrc;
 701 }
 702
 703 int
 704 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 705 {
 706         lnet_text_buf_t   *ltb;
 707
 708         while (!list_empty(tbs)) {
 709                 ltb = list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 710
 711                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 712                         lnet_free_text_bufs(tbs);
 713                         return -EINVAL;
 714                 }
 715
 716                 list_del(&ltb->ltb_list);
 717                 lnet_free_text_buf(ltb);
 718         }
 719
 720         return 0;
 721 }
 722
 723 int
 724 lnet_parse_routes (char *routes, int *im_a_router)
 725 {
 726         struct list_head  tbs;
 727         int               rc = 0;
 728
 729         *im_a_router = 0;
 730
 731         if (the_lnet.ln_ptlcompat > 0 &&
 732             routes[0] != 0) {
 733                 /* Can't route when running in compatibility mode */
 734                 LCONSOLE_ERROR_MSG(0x116, "Route tables are not supported when "
 735                                    "'portals_compatible' is set\n");
 736                 return -EINVAL;
 737         }
 738
 739         CFS_INIT_LIST_HEAD(&tbs);
 740
 741         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 742                 CERROR("Error parsing routes\n");
 743                 rc = -EINVAL;
 744         } else {
 745                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 746         }
 747
 748         LASSERT (lnet_tbnob == 0);
 749         return rc;
 750 }
 751
 752 void
 753 lnet_print_range_exprs(struct list_head *exprs)
 754 {
 755         struct list_head   *e;
 756         lnet_range_expr_t *lre;
 757
 758         list_for_each(e, exprs) {
 759                 lre = list_entry(exprs->next, lnet_range_expr_t, lre_list);
 760
 761                 CDEBUG(D_WARNING, "%d-%d/%d\n",
 762                        lre->lre_min, lre->lre_max, lre->lre_stride);
 763         }
 764
 765         CDEBUG(D_WARNING, "%d allocated\n", lnet_re_alloc);
 766 }
 767
 768 int
 769 lnet_new_range_expr(struct list_head *exprs, int min, int max, int stride)
 770 {
 771         lnet_range_expr_t *lre;
 772
 773         CDEBUG(D_NET, "%d-%d/%d\n", min, max, stride);
 774
 775         if (min < 0 || min > 255 || min > max || stride < 0)
 776                 return -EINVAL;
 777
 778         LIBCFS_ALLOC(lre, sizeof(*lre));
 779         if (lre == NULL)
 780                 return -ENOMEM;
 781
 782         lnet_re_alloc++;
 783
 784         lre->lre_min = min;
 785         lre->lre_max = max;
 786         lre->lre_stride = stride;
 787
 788         list_add(&lre->lre_list, exprs);
 789         return 0;
 790 }
 791
 792 void
 793 lnet_destroy_range_exprs(struct list_head *exprs)
 794 {
 795         lnet_range_expr_t *lre;
 796
 797         while (!list_empty(exprs)) {
 798                 lre = list_entry(exprs->next, lnet_range_expr_t, lre_list);
 799
 800                 list_del(&lre->lre_list);
 801                 LIBCFS_FREE(lre, sizeof(*lre));
 802                 lnet_re_alloc--;
 803         }
 804 }
 805
 806 int
 807 lnet_parse_range_expr(struct list_head *exprs, char *str)
 808 {
 809         int                nob = strlen(str);
 810         char              *sep;
 811         int                n;
 812         int                x;
 813         int                y;
 814         int                z;
 815         int                rc;
 816
 817         if (nob == 0)
 818                 return -EINVAL;
 819
 820         if (!strcmp(str, "*"))                  /* match all */
 821                 return lnet_new_range_expr(exprs, 0, 255, 1);
 822
 823         n = nob;
 824         if (sscanf(str, "%u%n", &x, &n) >= 1 && n == nob) {
 825                 /* simple number */
 826                 return lnet_new_range_expr(exprs, x, x, 1);
 827         }
 828
 829         /* Has to be an expansion */
 830         if (!(str[0] == '[' && nob > 2 && str[nob-1] == ']'))
 831                 return -EINVAL;
 832
 833         nob -= 2;
 834         str++;
 835         str[nob] = 0;
 836
 837         do {
 838                 /* Comma separated list of expressions... */
 839                 sep = strchr(str, ',');
 840                 if (sep != NULL)
 841                         *sep++ = 0;
 842
 843                 nob = strlen(str);
 844                 n = nob;
 845                 if (sscanf(str, "%u%n", &x, &n) >= 1 && n == nob) {
 846                         /* simple number */
 847                         rc = lnet_new_range_expr(exprs, x, x, 1);
 848                         if (rc != 0)
 849                                 return rc;
 850
 851                         continue;
 852                 }
 853
 854                 n = nob;
 855                 if (sscanf(str, "%u-%u%n", &x, &y, &n) >= 2 && n == nob) {
 856                         /* simple range */
 857                         rc = lnet_new_range_expr(exprs, x, y, 1);
 858                         if (rc != 0)
 859                                 return rc;
 860                         continue;
 861                 }
 862
 863                 n = nob;
 864                 if (sscanf(str, "%u-%u/%u%n", &x, &y, &z, &n) >= 3 && n == nob) {
 865                         /* strided range */
 866                         rc = lnet_new_range_expr(exprs, x, y, z);
 867                         if (rc != 0)
 868                                 return rc;
 869                         continue;
 870                 }
 871
 872                 return -EINVAL;
 873
 874         } while ((str = sep) != NULL);
 875
 876         return 0;
 877 }
 878
 879 int
 880 lnet_match_network_token(char *token, __u32 *ipaddrs, int nip)
 881 {
 882         struct list_head   exprs[4];
 883         struct list_head  *e;
 884         lnet_range_expr_t *re;
 885         char              *str;
 886         int                i;
 887         int                j;
 888         __u32              ip;
 889         int                n;
 890         int                match;
 891         int                rc;
 892
 893         for (i = 0; i < 4; i++)
 894                 CFS_INIT_LIST_HEAD(&exprs[i]);
 895
 896         for (i = 0; i < 4; i++) {
 897                 str = token;
 898                 if (i != 3) {
 899                         token = strchr(token, '.');
 900                         if (token == NULL) {
 901                                 rc = -EINVAL;
 902                                 goto out;
 903                         }
 904                         *token++ = 0;
 905                 }
 906
 907                 rc = lnet_parse_range_expr(&exprs[i], str);
 908                 if (rc != 0) {
 909                         LASSERT (rc < 0);
 910                         goto out;
 911                 }
 912         }
 913
 914         for (match = i = 0; !match && i < nip; i++) {
 915                 ip = ipaddrs[i];
 916
 917                 for (match = 1, j = 0; match && j < 4; j++) {
 918                         n = (ip >> (8 * (3 - j))) & 0xff;
 919                         match = 0;
 920
 921                         list_for_each(e, &exprs[j]) {
 922                                 re = list_entry(e, lnet_range_expr_t, lre_list);
 923
 924                                 if (re->lre_min <= n &&
 925                                     re->lre_max >= n &&
 926                                     (n - re->lre_min) % re->lre_stride == 0) {
 927                                         match = 1;
 928                                         break;
 929                                 }
 930                         }
 931                 }
 932         }
 933
 934         rc = match ? 1 : 0;
 935
 936  out:
 937         for (i = 0; i < 4; i++)
 938                 lnet_destroy_range_exprs(&exprs[i]);
 939         LASSERT (lnet_re_alloc == 0);
 940
 941         return rc;
 942 }
 943
 944 int
 945 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 946 {
 947         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 948
 949         int   matched = 0;
 950         int   ntokens = 0;
 951         int   len;
 952         char *net = NULL;
 953         char *sep;
 954         char *token;
 955         int   rc;
 956
 957         LASSERT (strlen(net_entry) < sizeof(tokens));
 958
 959         /* work on a copy of the string */
 960         strcpy(tokens, net_entry);
 961         sep = tokens;
 962         for (;;) {
 963                 /* scan for token start */
 964                 while (lnet_iswhite(*sep))
 965                         sep++;
 966                 if (*sep == 0)
 967                         break;
 968
 969                 token = sep++;
 970
 971                 /* scan for token end */
 972                 while (*sep != 0 && !lnet_iswhite(*sep))
 973                         sep++;
 974                 if (*sep != 0)
 975                         *sep++ = 0;
 976
 977                 if (ntokens++ == 0) {
 978                         net = token;
 979                         continue;
 980                 }
 981
 982                 len = strlen(token);
 983
 984                 rc = lnet_match_network_token(token, ipaddrs, nip);
 985                 if (rc < 0) {
 986                         lnet_syntax("ip2nets", net_entry,
 987                                     token - tokens, len);
 988                         return rc;
 989                 }
 990
 991                 matched |= (rc != 0);
 992         }
 993
 994         if (!matched)
 995                 return 0;
 996
 997         strcpy(net_entry, net);                 /* replace with matched net */
 998         return 1;
 999 }
1000
1001 __u32
1002 lnet_netspec2net(char *netspec)
1003 {
1004         char   *bracket = strchr(netspec, '(');
1005         __u32   net;
1006
1007         if (bracket != NULL)
1008                 *bracket = 0;
1009
1010         net = libcfs_str2net(netspec);
1011
1012         if (bracket != NULL)
1013                 *bracket = '(';
1014
1015         return net;
1016 }
1017
1018 int
1019 lnet_splitnets(char *source, struct list_head *nets)
1020 {
1021         int               offset = 0;
1022         int               offset2;
1023         int               len;
1024         lnet_text_buf_t  *tb;
1025         lnet_text_buf_t  *tb2;
1026         struct list_head *t;
1027         char             *sep;
1028         char             *bracket;
1029         __u32             net;
1030
1031         LASSERT (!list_empty(nets));
1032         LASSERT (nets->next == nets->prev);     /* single entry */
1033
1034         tb = list_entry(nets->next, lnet_text_buf_t, ltb_list);
1035
1036         for (;;) {
1037                 sep = strchr(tb->ltb_text, ',');
1038                 bracket = strchr(tb->ltb_text, '(');
1039
1040                 if (sep != NULL &&
1041                     bracket != NULL &&
1042                     bracket < sep) {
1043                         /* netspec lists interfaces... */
1044
1045                         offset2 = offset + (bracket - tb->ltb_text);
1046                         len = strlen(bracket);
1047
1048                         bracket = strchr(bracket + 1, ')');
1049
1050                         if (bracket == NULL ||
1051                             !(bracket[1] == ',' || bracket[1] == 0)) {
1052                                 lnet_syntax("ip2nets", source, offset2, len);
1053                                 return -EINVAL;
1054                         }
1055
1056                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
1057                 }
1058
1059                 if (sep != NULL)
1060                         *sep++ = 0;
1061
1062                 net = lnet_netspec2net(tb->ltb_text);
1063                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
1064                         lnet_syntax("ip2nets", source, offset,
1065                                     strlen(tb->ltb_text));
1066                         return -EINVAL;
1067                 }
1068
1069                 list_for_each(t, nets) {
1070                         tb2 = list_entry(t, lnet_text_buf_t, ltb_list);
1071
1072                         if (tb2 == tb)
1073                                 continue;
1074
1075                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1076                                 /* duplicate network */
1077                                 lnet_syntax("ip2nets", source, offset,
1078                                             strlen(tb->ltb_text));
1079                                 return -EINVAL;
1080                         }
1081                 }
1082
1083                 if (sep == NULL)
1084                         return 0;
1085
1086                 offset += sep - tb->ltb_text;
1087                 tb2 = lnet_new_text_buf(strlen(sep));
1088                 if (tb2 == NULL)
1089                         return -ENOMEM;
1090
1091                 strcpy(tb2->ltb_text, sep);
1092                 list_add_tail(&tb2->ltb_list, nets);
1093
1094                 tb = tb2;
1095         }
1096 }
1097
1098 int
1099 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1100 {
1101         static char  networks[LNET_SINGLE_TEXTBUF_NOB];
1102         static char  source[LNET_SINGLE_TEXTBUF_NOB];
1103
1104         struct list_head    raw_entries;
1105         struct list_head    matched_nets;
1106         struct list_head    current_nets;
1107         struct list_head   *t;
1108         struct list_head   *t2;
1109         lnet_text_buf_t    *tb;
1110         lnet_text_buf_t    *tb2;
1111         __u32               net1;
1112         __u32               net2;
1113         int                 len;
1114         int                 count;
1115         int                 dup;
1116         int                 rc;
1117
1118         CFS_INIT_LIST_HEAD(&raw_entries);
1119         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1120                 CERROR("Error parsing ip2nets\n");
1121                 LASSERT (lnet_tbnob == 0);
1122                 return -EINVAL;
1123         }
1124
1125         CFS_INIT_LIST_HEAD(&matched_nets);
1126         CFS_INIT_LIST_HEAD(&current_nets);
1127         networks[0] = 0;
1128         count = 0;
1129         len = 0;
1130         rc = 0;
1131
1132         while (!list_empty(&raw_entries)) {
1133                 tb = list_entry(raw_entries.next, lnet_text_buf_t, ltb_list);
1134
1135                 strncpy(source, tb->ltb_text, sizeof(source)-1);
1136                 source[sizeof(source)-1] = 0;
1137
1138                 /* replace ltb_text with the network(s) add on match */
1139                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1140                 if (rc < 0)
1141                         break;
1142
1143                 list_del(&tb->ltb_list);
1144
1145                 if (rc == 0) {                  /* no match */
1146                         lnet_free_text_buf(tb);
1147                         continue;
1148                 }
1149
1150                 /* split into separate networks */
1151                 CFS_INIT_LIST_HEAD(&current_nets);
1152                 list_add(&tb->ltb_list, &current_nets);
1153                 rc = lnet_splitnets(source, &current_nets);
1154                 if (rc < 0)
1155                         break;
1156
1157                 dup = 0;
1158                 list_for_each (t, &current_nets) {
1159                         tb = list_entry(t, lnet_text_buf_t, ltb_list);
1160                         net1 = lnet_netspec2net(tb->ltb_text);
1161                         LASSERT (net1 != LNET_NIDNET(LNET_NID_ANY));
1162
1163                         list_for_each(t2, &matched_nets) {
1164                                 tb2 = list_entry(t2, lnet_text_buf_t, ltb_list);
1165                                 net2 = lnet_netspec2net(tb2->ltb_text);
1166                                 LASSERT (net2 != LNET_NIDNET(LNET_NID_ANY));
1167
1168                                 if (net1 == net2) {
1169                                         dup = 1;
1170                                         break;
1171                                 }
1172                         }
1173
1174                         if (dup)
1175                                 break;
1176                 }
1177
1178                 if (dup) {
1179                         lnet_free_text_bufs(&current_nets);
1180                         continue;
1181                 }
1182
1183                 list_for_each_safe(t, t2, &current_nets) {
1184                         tb = list_entry(t, lnet_text_buf_t, ltb_list);
1185
1186                         list_del(&tb->ltb_list);
1187                         list_add_tail(&tb->ltb_list, &matched_nets);
1188
1189                         len += snprintf(networks + len, sizeof(networks) - len,
1190                                         "%s%s", (len == 0) ? "" : ",",
1191                                         tb->ltb_text);
1192
1193                         if (len >= sizeof(networks)) {
1194                                 CERROR("Too many matched networks\n");
1195                                 rc = -E2BIG;
1196                                 goto out;
1197                         }
1198                 }
1199
1200                 count++;
1201         }
1202
1203  out:
1204         lnet_free_text_bufs(&raw_entries);
1205         lnet_free_text_bufs(&matched_nets);
1206         lnet_free_text_bufs(&current_nets);
1207         LASSERT (lnet_tbnob == 0);
1208
1209         if (rc < 0)
1210                 return rc;
1211
1212         *networksp = networks;
1213         return count;
1214 }
1215
1216 #ifdef __KERNEL__
1217 void
1218 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1219 {
1220         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1221 }
1222
1223 int
1224 lnet_ipaddr_enumerate (__u32 **ipaddrsp)
1225 {
1226         int        up;
1227         __u32      netmask;
1228         __u32     *ipaddrs;
1229         __u32     *ipaddrs2;
1230         int        nip;
1231         char     **ifnames;
1232         int        nif = libcfs_ipif_enumerate(&ifnames);
1233         int        i;
1234         int        rc;
1235
1236         if (nif <= 0)
1237                 return nif;
1238
1239         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1240         if (ipaddrs == NULL) {
1241                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1242                 libcfs_ipif_free_enumeration(ifnames, nif);
1243                 return -ENOMEM;
1244         }
1245
1246         for (i = nip = 0; i < nif; i++) {
1247                 if (!strcmp(ifnames[i], "lo"))
1248                         continue;
1249
1250                 rc = libcfs_ipif_query(ifnames[i], &up,
1251                                        &ipaddrs[nip], &netmask);
1252                 if (rc != 0) {
1253                         CWARN("Can't query interface %s: %d\n",
1254                               ifnames[i], rc);
1255                         continue;
1256                 }
1257
1258                 if (!up) {
1259                         CWARN("Ignoring interface %s: it's down\n",
1260                               ifnames[i]);
1261                         continue;
1262                 }
1263
1264                 nip++;
1265         }
1266
1267         libcfs_ipif_free_enumeration(ifnames, nif);
1268
1269         if (nip == nif) {
1270                 *ipaddrsp = ipaddrs;
1271         } else {
1272                 if (nip > 0) {
1273                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1274                         if (ipaddrs2 == NULL) {
1275                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1276                                 nip = -ENOMEM;
1277                         } else {
1278                                 memcpy(ipaddrs2, ipaddrs,
1279                                        nip * sizeof(*ipaddrs));
1280                                 *ipaddrsp = ipaddrs2;
1281                                 rc = nip;
1282                         }
1283                 }
1284                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1285         }
1286         return nip;
1287 }
1288
1289 int
1290 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1291 {
1292         __u32     *ipaddrs;
1293         int        nip = lnet_ipaddr_enumerate(&ipaddrs);
1294         int        rc;
1295
1296         if (nip < 0) {
1297                 LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP "
1298                                    "interfaces for ip2nets to match\n", nip);
1299                 return nip;
1300         }
1301
1302         if (nip == 0) {
1303                 LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces "
1304                                    "for ip2nets to match\n");
1305                 return -ENOENT;
1306         }
1307
1308         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1309         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1310
1311         if (rc < 0) {
1312                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1313                 return rc;
1314         }
1315
1316         if (rc == 0) {
1317                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1318                                    "any local IP interfaces\n");
1319                 return -ENOENT;
1320         }
1321
1322         return 0;
1323 }
1324
1325 int
1326 lnet_set_ip_niaddr (lnet_ni_t *ni)
1327 {
1328         __u32  net = LNET_NIDNET(ni->ni_nid);
1329         char **names;
1330         int    n;
1331         __u32  ip;
1332         __u32  netmask;
1333         int    up;
1334         int    i;
1335         int    rc;
1336
1337         /* Convenience for LNDs that use the IP address of a local interface as
1338          * the local address part of their NID */
1339
1340         if (ni->ni_interfaces[0] != NULL) {
1341
1342                 CLASSERT (LNET_MAX_INTERFACES > 1);
1343
1344                 if (ni->ni_interfaces[1] != NULL) {
1345                         CERROR("Net %s doesn't support multiple interfaces\n",
1346                                libcfs_net2str(net));
1347                         return -EPERM;
1348                 }
1349
1350                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1351                                        &up, &ip, &netmask);
1352                 if (rc != 0) {
1353                         CERROR("Net %s can't query interface %s: %d\n",
1354                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1355                         return -EPERM;
1356                 }
1357
1358                 if (!up) {
1359                         CERROR("Net %s can't use interface %s: it's down\n",
1360                                libcfs_net2str(net), ni->ni_interfaces[0]);
1361                         return -ENETDOWN;
1362                 }
1363
1364                 ni->ni_nid = LNET_MKNID(net, ip);
1365                 return 0;
1366         }
1367
1368         n = libcfs_ipif_enumerate(&names);
1369         if (n <= 0) {
1370                 CERROR("Net %s can't enumerate interfaces: %d\n",
1371                        libcfs_net2str(net), n);
1372                 return 0;
1373         }
1374
1375         for (i = 0; i < n; i++) {
1376                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1377                         continue;
1378
1379                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1380
1381                 if (rc != 0) {
1382                         CWARN("Net %s can't query interface %s: %d\n",
1383                               libcfs_net2str(net), names[i], rc);
1384                         continue;
1385                 }
1386
1387                 if (!up) {
1388                         CWARN("Net %s ignoring interface %s (down)\n",
1389                               libcfs_net2str(net), names[i]);
1390                         continue;
1391                 }
1392
1393                 libcfs_ipif_free_enumeration(names, n);
1394                 ni->ni_nid = LNET_MKNID(net, ip);
1395                 return 0;
1396         }
1397
1398         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1399         libcfs_ipif_free_enumeration(names, n);
1400         return -ENOENT;
1401 }
1402 EXPORT_SYMBOL(lnet_set_ip_niaddr);
1403
1404 #endif