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