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