kernel/drivers/staging/lustre/lnet/lnet/config.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LNET
  38 #include "../../include/linux/lnet/lib-lnet.h"
  39
  40 struct lnet_text_buf_t {            /* tmp struct for parsing routes */
  41         struct list_head         ltb_list;      /* stash on lists */
  42         int             ltb_size;       /* allocated size */
  43         char           ltb_text[0];     /* text buffer */
  44 };
  45
  46 static int lnet_tbnob;                  /* track text buf allocation */
  47 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  48 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  49
  50 static void
  51 lnet_syntax(char *name, char *str, int offset, int width)
  52 {
  53         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  54         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  55
  56         memset(dots, '.', sizeof(dots));
  57         dots[sizeof(dots)-1] = 0;
  58         memset(dashes, '-', sizeof(dashes));
  59         dashes[sizeof(dashes)-1] = 0;
  60
  61         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  62         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  63                            (int)strlen(name), dots, offset, dots,
  64                             (width < 1) ? 0 : width - 1, dashes);
  65 }
  66
  67 static int
  68 lnet_issep(char c)
  69 {
  70         switch (c) {
  71         case '\n':
  72         case '\r':
  73         case ';':
  74                 return 1;
  75         default:
  76                 return 0;
  77         }
  78 }
  79
  80 static int
  81 lnet_net_unique(__u32 net, struct list_head *nilist)
  82 {
  83         struct list_head       *tmp;
  84         lnet_ni_t       *ni;
  85
  86         list_for_each(tmp, nilist) {
  87                 ni = list_entry(tmp, lnet_ni_t, ni_list);
  88
  89                 if (LNET_NIDNET(ni->ni_nid) == net)
  90                         return 0;
  91         }
  92
  93         return 1;
  94 }
  95
  96 void
  97 lnet_ni_free(struct lnet_ni *ni)
  98 {
  99         if (ni->ni_refs != NULL)
 100                 cfs_percpt_free(ni->ni_refs);
 101
 102         if (ni->ni_tx_queues != NULL)
 103                 cfs_percpt_free(ni->ni_tx_queues);
 104
 105         if (ni->ni_cpts != NULL)
 106                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 107
 108         LIBCFS_FREE(ni, sizeof(*ni));
 109 }
 110
 111 static lnet_ni_t *
 112 lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, struct list_head *nilist)
 113 {
 114         struct lnet_tx_queue    *tq;
 115         struct lnet_ni          *ni;
 116         int                     rc;
 117         int                     i;
 118
 119         if (!lnet_net_unique(net, nilist)) {
 120                 LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n",
 121                                    libcfs_net2str(net));
 122                 return NULL;
 123         }
 124
 125         LIBCFS_ALLOC(ni, sizeof(*ni));
 126         if (ni == NULL) {
 127                 CERROR("Out of memory creating network %s\n",
 128                        libcfs_net2str(net));
 129                 return NULL;
 130         }
 131
 132         spin_lock_init(&ni->ni_lock);
 133         INIT_LIST_HEAD(&ni->ni_cptlist);
 134         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 135                                        sizeof(*ni->ni_refs[0]));
 136         if (ni->ni_refs == NULL)
 137                 goto failed;
 138
 139         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 140                                             sizeof(*ni->ni_tx_queues[0]));
 141         if (ni->ni_tx_queues == NULL)
 142                 goto failed;
 143
 144         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 145                 INIT_LIST_HEAD(&tq->tq_delayed);
 146
 147         if (el == NULL) {
 148                 ni->ni_cpts  = NULL;
 149                 ni->ni_ncpts = LNET_CPT_NUMBER;
 150         } else {
 151                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 152                 if (rc <= 0) {
 153                         CERROR("Failed to set CPTs for NI %s: %d\n",
 154                                libcfs_net2str(net), rc);
 155                         goto failed;
 156                 }
 157
 158                 LASSERT(rc <= LNET_CPT_NUMBER);
 159                 if (rc == LNET_CPT_NUMBER) {
 160                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 161                         ni->ni_cpts = NULL;
 162                 }
 163
 164                 ni->ni_ncpts = rc;
 165         }
 166
 167         /* LND will fill in the address part of the NID */
 168         ni->ni_nid = LNET_MKNID(net, 0);
 169         ni->ni_last_alive = get_seconds();
 170         list_add_tail(&ni->ni_list, nilist);
 171         return ni;
 172  failed:
 173         lnet_ni_free(ni);
 174         return NULL;
 175 }
 176
 177 int
 178 lnet_parse_networks(struct list_head *nilist, char *networks)
 179 {
 180         struct cfs_expr_list *el = NULL;
 181         int             tokensize = strlen(networks) + 1;
 182         char            *tokens;
 183         char            *str;
 184         char            *tmp;
 185         struct lnet_ni  *ni;
 186         __u32           net;
 187         int             nnets = 0;
 188
 189         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 190                 /* _WAY_ conservative */
 191                 LCONSOLE_ERROR_MSG(0x112,
 192                                    "Can't parse networks: string too long\n");
 193                 return -EINVAL;
 194         }
 195
 196         LIBCFS_ALLOC(tokens, tokensize);
 197         if (tokens == NULL) {
 198                 CERROR("Can't allocate net tokens\n");
 199                 return -ENOMEM;
 200         }
 201
 202         the_lnet.ln_network_tokens = tokens;
 203         the_lnet.ln_network_tokens_nob = tokensize;
 204         memcpy(tokens, networks, tokensize);
 205         str = tmp = tokens;
 206
 207         /* Add in the loopback network */
 208         ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist);
 209         if (ni == NULL)
 210                 goto failed;
 211
 212         while (str != NULL && *str != 0) {
 213                 char    *comma = strchr(str, ',');
 214                 char    *bracket = strchr(str, '(');
 215                 char    *square = strchr(str, '[');
 216                 char    *iface;
 217                 int     niface;
 218                 int     rc;
 219
 220                 /* NB we don't check interface conflicts here; it's the LNDs
 221                  * responsibility (if it cares at all) */
 222
 223                 if (square != NULL && (comma == NULL || square < comma)) {
 224                         /* i.e: o2ib0(ib0)[1,2], number between square
 225                          * brackets are CPTs this NI needs to be bond */
 226                         if (bracket != NULL && bracket > square) {
 227                                 tmp = square;
 228                                 goto failed_syntax;
 229                         }
 230
 231                         tmp = strchr(square, ']');
 232                         if (tmp == NULL) {
 233                                 tmp = square;
 234                                 goto failed_syntax;
 235                         }
 236
 237                         rc = cfs_expr_list_parse(square, tmp - square + 1,
 238                                                  0, LNET_CPT_NUMBER - 1, &el);
 239                         if (rc != 0) {
 240                                 tmp = square;
 241                                 goto failed_syntax;
 242                         }
 243
 244                         while (square <= tmp)
 245                                 *square++ = ' ';
 246                 }
 247
 248                 if (bracket == NULL ||
 249                     (comma != NULL && comma < bracket)) {
 250
 251                         /* no interface list specified */
 252
 253                         if (comma != NULL)
 254                                 *comma++ = 0;
 255                         net = libcfs_str2net(cfs_trimwhite(str));
 256
 257                         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 258                                 LCONSOLE_ERROR_MSG(0x113,
 259                                                    "Unrecognised network type\n");
 260                                 tmp = str;
 261                                 goto failed_syntax;
 262                         }
 263
 264                         if (LNET_NETTYP(net) != LOLND && /* LO is implicit */
 265                             lnet_ni_alloc(net, el, nilist) == NULL)
 266                                 goto failed;
 267
 268                         if (el != NULL) {
 269                                 cfs_expr_list_free(el);
 270                                 el = NULL;
 271                         }
 272
 273                         str = comma;
 274                         continue;
 275                 }
 276
 277                 *bracket = 0;
 278                 net = libcfs_str2net(cfs_trimwhite(str));
 279                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 280                         tmp = str;
 281                         goto failed_syntax;
 282                 }
 283
 284                 nnets++;
 285                 ni = lnet_ni_alloc(net, el, nilist);
 286                 if (ni == NULL)
 287                         goto failed;
 288
 289                 if (el != NULL) {
 290                         cfs_expr_list_free(el);
 291                         el = NULL;
 292                 }
 293
 294                 niface = 0;
 295                 iface = bracket + 1;
 296
 297                 bracket = strchr(iface, ')');
 298                 if (bracket == NULL) {
 299                         tmp = iface;
 300                         goto failed_syntax;
 301                 }
 302
 303                 *bracket = 0;
 304                 do {
 305                         comma = strchr(iface, ',');
 306                         if (comma != NULL)
 307                                 *comma++ = 0;
 308
 309                         iface = cfs_trimwhite(iface);
 310                         if (*iface == 0) {
 311                                 tmp = iface;
 312                                 goto failed_syntax;
 313                         }
 314
 315                         if (niface == LNET_MAX_INTERFACES) {
 316                                 LCONSOLE_ERROR_MSG(0x115,
 317                                                    "Too many interfaces for net %s\n",
 318                                                    libcfs_net2str(net));
 319                                 goto failed;
 320                         }
 321
 322                         ni->ni_interfaces[niface++] = iface;
 323                         iface = comma;
 324                 } while (iface != NULL);
 325
 326                 str = bracket + 1;
 327                 comma = strchr(bracket + 1, ',');
 328                 if (comma != NULL) {
 329                         *comma = 0;
 330                         str = cfs_trimwhite(str);
 331                         if (*str != 0) {
 332                                 tmp = str;
 333                                 goto failed_syntax;
 334                         }
 335                         str = comma + 1;
 336                         continue;
 337                 }
 338
 339                 str = cfs_trimwhite(str);
 340                 if (*str != 0) {
 341                         tmp = str;
 342                         goto failed_syntax;
 343                 }
 344         }
 345
 346         LASSERT(!list_empty(nilist));
 347         return 0;
 348
 349  failed_syntax:
 350         lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp));
 351  failed:
 352         while (!list_empty(nilist)) {
 353                 ni = list_entry(nilist->next, lnet_ni_t, ni_list);
 354
 355                 list_del(&ni->ni_list);
 356                 lnet_ni_free(ni);
 357         }
 358
 359         if (el != NULL)
 360                 cfs_expr_list_free(el);
 361
 362         LIBCFS_FREE(tokens, tokensize);
 363         the_lnet.ln_network_tokens = NULL;
 364
 365         return -EINVAL;
 366 }
 367
 368 static struct lnet_text_buf_t *
 369 lnet_new_text_buf(int str_len)
 370 {
 371         struct lnet_text_buf_t *ltb;
 372         int           nob;
 373
 374         /* NB allocate space for the terminating 0 */
 375         nob = offsetof(struct lnet_text_buf_t, ltb_text[str_len + 1]);
 376         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 377                 /* _way_ conservative for "route net gateway..." */
 378                 CERROR("text buffer too big\n");
 379                 return NULL;
 380         }
 381
 382         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 383                 CERROR("Too many text buffers\n");
 384                 return NULL;
 385         }
 386
 387         LIBCFS_ALLOC(ltb, nob);
 388         if (ltb == NULL)
 389                 return NULL;
 390
 391         ltb->ltb_size = nob;
 392         ltb->ltb_text[0] = 0;
 393         lnet_tbnob += nob;
 394         return ltb;
 395 }
 396
 397 static void
 398 lnet_free_text_buf(struct lnet_text_buf_t *ltb)
 399 {
 400         lnet_tbnob -= ltb->ltb_size;
 401         LIBCFS_FREE(ltb, ltb->ltb_size);
 402 }
 403
 404 static void
 405 lnet_free_text_bufs(struct list_head *tbs)
 406 {
 407         struct lnet_text_buf_t  *ltb;
 408
 409         while (!list_empty(tbs)) {
 410                 ltb = list_entry(tbs->next, struct lnet_text_buf_t, ltb_list);
 411
 412                 list_del(&ltb->ltb_list);
 413                 lnet_free_text_buf(ltb);
 414         }
 415 }
 416
 417 static int
 418 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 419 {
 420         struct list_head        pending;
 421         char         *sep;
 422         int            nob;
 423         int            i;
 424         struct lnet_text_buf_t  *ltb;
 425
 426         INIT_LIST_HEAD(&pending);
 427
 428         /* Split 'str' into separate commands */
 429         for (;;) {
 430                 /* skip leading whitespace */
 431                 while (isspace(*str))
 432                         str++;
 433
 434                 /* scan for separator or comment */
 435                 for (sep = str; *sep != 0; sep++)
 436                         if (lnet_issep(*sep) || *sep == '#')
 437                                 break;
 438
 439                 nob = (int)(sep - str);
 440                 if (nob > 0) {
 441                         ltb = lnet_new_text_buf(nob);
 442                         if (ltb == NULL) {
 443                                 lnet_free_text_bufs(&pending);
 444                                 return -1;
 445                         }
 446
 447                         for (i = 0; i < nob; i++)
 448                                 if (isspace(str[i]))
 449                                         ltb->ltb_text[i] = ' ';
 450                                 else
 451                                         ltb->ltb_text[i] = str[i];
 452
 453                         ltb->ltb_text[nob] = 0;
 454
 455                         list_add_tail(&ltb->ltb_list, &pending);
 456                 }
 457
 458                 if (*sep == '#') {
 459                         /* scan for separator */
 460                         do {
 461                                 sep++;
 462                         } while (*sep != 0 && !lnet_issep(*sep));
 463                 }
 464
 465                 if (*sep == 0)
 466                         break;
 467
 468                 str = sep + 1;
 469         }
 470
 471         list_splice(&pending, tbs->prev);
 472         return 0;
 473 }
 474
 475 static int
 476 lnet_expand1tb(struct list_head *list,
 477                char *str, char *sep1, char *sep2,
 478                char *item, int itemlen)
 479 {
 480         int           len1 = (int)(sep1 - str);
 481         int           len2 = strlen(sep2 + 1);
 482         struct lnet_text_buf_t *ltb;
 483
 484         LASSERT(*sep1 == '[');
 485         LASSERT(*sep2 == ']');
 486
 487         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 488         if (ltb == NULL)
 489                 return -ENOMEM;
 490
 491         memcpy(ltb->ltb_text, str, len1);
 492         memcpy(&ltb->ltb_text[len1], item, itemlen);
 493         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 494         ltb->ltb_text[len1 + itemlen + len2] = 0;
 495
 496         list_add_tail(&ltb->ltb_list, list);
 497         return 0;
 498 }
 499
 500 static int
 501 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 502 {
 503         char          num[16];
 504         struct list_head        pending;
 505         char         *sep;
 506         char         *sep2;
 507         char         *parsed;
 508         char         *enditem;
 509         int            lo;
 510         int            hi;
 511         int            stride;
 512         int            i;
 513         int            nob;
 514         int            scanned;
 515
 516         INIT_LIST_HEAD(&pending);
 517
 518         sep = strchr(str, '[');
 519         if (sep == NULL)                        /* nothing to expand */
 520                 return 0;
 521
 522         sep2 = strchr(sep, ']');
 523         if (sep2 == NULL)
 524                 goto failed;
 525
 526         for (parsed = sep; parsed < sep2; parsed = enditem) {
 527
 528                 enditem = ++parsed;
 529                 while (enditem < sep2 && *enditem != ',')
 530                         enditem++;
 531
 532                 if (enditem == parsed)          /* no empty items */
 533                         goto failed;
 534
 535                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi,
 536                            &stride, &scanned) < 3) {
 537
 538                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 539
 540                                 /* simple string enumeration */
 541                                 if (lnet_expand1tb(
 542                                      &pending, str, sep, sep2,
 543                                      parsed,
 544                                      (int)(enditem - parsed)) != 0) {
 545                                         goto failed;
 546                                 }
 547
 548                                 continue;
 549                         }
 550
 551                         stride = 1;
 552                 }
 553
 554                 /* range expansion */
 555
 556                 if (enditem != parsed + scanned) /* no trailing junk */
 557                         goto failed;
 558
 559                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 560                     (hi - lo) % stride != 0)
 561                         goto failed;
 562
 563                 for (i = lo; i <= hi; i += stride) {
 564
 565                         snprintf(num, sizeof(num), "%d", i);
 566                         nob = strlen(num);
 567                         if (nob + 1 == sizeof(num))
 568                                 goto failed;
 569
 570                         if (lnet_expand1tb(&pending, str, sep, sep2,
 571                                            num, nob) != 0)
 572                                 goto failed;
 573                 }
 574         }
 575
 576         list_splice(&pending, tbs->prev);
 577         return 1;
 578
 579  failed:
 580         lnet_free_text_bufs(&pending);
 581         return -1;
 582 }
 583
 584 static int
 585 lnet_parse_hops(char *str, unsigned int *hops)
 586 {
 587         int     len = strlen(str);
 588         int     nob = len;
 589
 590         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 591                 nob == len &&
 592                 *hops > 0 && *hops < 256);
 593 }
 594
 595 #define LNET_PRIORITY_SEPARATOR (':')
 596
 597 static int
 598 lnet_parse_priority(char *str, unsigned int *priority, char **token)
 599 {
 600         int   nob;
 601         char *sep;
 602         int   len;
 603
 604         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
 605         if (sep == NULL) {
 606                 *priority = 0;
 607                 return 0;
 608         }
 609         len = strlen(sep + 1);
 610
 611         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
 612                 /* Update the caller's token pointer so it treats the found
 613                    priority as the token to report in the error message. */
 614                 *token += sep - str + 1;
 615                 return -1;
 616         }
 617
 618         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
 619
 620         /*
 621          * Change priority separator to \0 to be able to parse NID
 622          */
 623         *sep = '\0';
 624         return 0;
 625 }
 626
 627 static int
 628 lnet_parse_route(char *str, int *im_a_router)
 629 {
 630         /* static scratch buffer OK (single threaded) */
 631         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 632
 633         struct list_head        nets;
 634         struct list_head        gateways;
 635         struct list_head       *tmp1;
 636         struct list_head       *tmp2;
 637         __u32        net;
 638         lnet_nid_t      nid;
 639         struct lnet_text_buf_t  *ltb;
 640         int            rc;
 641         char         *sep;
 642         char         *token = str;
 643         int            ntokens = 0;
 644         int            myrc = -1;
 645         unsigned int      hops;
 646         int            got_hops = 0;
 647         unsigned int      priority = 0;
 648
 649         INIT_LIST_HEAD(&gateways);
 650         INIT_LIST_HEAD(&nets);
 651
 652         /* save a copy of the string for error messages */
 653         strncpy(cmd, str, sizeof(cmd) - 1);
 654         cmd[sizeof(cmd) - 1] = 0;
 655
 656         sep = str;
 657         for (;;) {
 658                 /* scan for token start */
 659                 while (isspace(*sep))
 660                         sep++;
 661                 if (*sep == 0) {
 662                         if (ntokens < (got_hops ? 3 : 2))
 663                                 goto token_error;
 664                         break;
 665                 }
 666
 667                 ntokens++;
 668                 token = sep++;
 669
 670                 /* scan for token end */
 671                 while (*sep != 0 && !isspace(*sep))
 672                         sep++;
 673                 if (*sep != 0)
 674                         *sep++ = 0;
 675
 676                 if (ntokens == 1) {
 677                         tmp2 = &nets;           /* expanding nets */
 678                 } else if (ntokens == 2 &&
 679                            lnet_parse_hops(token, &hops)) {
 680                         got_hops = 1;      /* got a hop count */
 681                         continue;
 682                 } else {
 683                         tmp2 = &gateways;       /* expanding gateways */
 684                 }
 685
 686                 ltb = lnet_new_text_buf(strlen(token));
 687                 if (ltb == NULL)
 688                         goto out;
 689
 690                 strcpy(ltb->ltb_text, token);
 691                 tmp1 = &ltb->ltb_list;
 692                 list_add_tail(tmp1, tmp2);
 693
 694                 while (tmp1 != tmp2) {
 695                         ltb = list_entry(tmp1, struct lnet_text_buf_t,
 696                                          ltb_list);
 697
 698                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 699                         if (rc < 0)
 700                                 goto token_error;
 701
 702                         tmp1 = tmp1->next;
 703
 704                         if (rc > 0) {           /* expanded! */
 705                                 list_del(&ltb->ltb_list);
 706                                 lnet_free_text_buf(ltb);
 707                                 continue;
 708                         }
 709
 710                         if (ntokens == 1) {
 711                                 net = libcfs_str2net(ltb->ltb_text);
 712                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 713                                     LNET_NETTYP(net) == LOLND)
 714                                         goto token_error;
 715                         } else {
 716                                 rc = lnet_parse_priority(ltb->ltb_text,
 717                                                          &priority, &token);
 718                                 if (rc < 0)
 719                                         goto token_error;
 720
 721                                 nid = libcfs_str2nid(ltb->ltb_text);
 722                                 if (nid == LNET_NID_ANY ||
 723                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 724                                         goto token_error;
 725                         }
 726                 }
 727         }
 728
 729         if (!got_hops)
 730                 hops = 1;
 731
 732         LASSERT(!list_empty(&nets));
 733         LASSERT(!list_empty(&gateways));
 734
 735         list_for_each(tmp1, &nets) {
 736                 ltb = list_entry(tmp1, struct lnet_text_buf_t, ltb_list);
 737                 net = libcfs_str2net(ltb->ltb_text);
 738                 LASSERT(net != LNET_NIDNET(LNET_NID_ANY));
 739
 740                 list_for_each(tmp2, &gateways) {
 741                         ltb = list_entry(tmp2, struct lnet_text_buf_t,
 742                                          ltb_list);
 743                         nid = libcfs_str2nid(ltb->ltb_text);
 744                         LASSERT(nid != LNET_NID_ANY);
 745
 746                         if (lnet_islocalnid(nid)) {
 747                                 *im_a_router = 1;
 748                                 continue;
 749                         }
 750
 751                         rc = lnet_add_route(net, hops, nid, priority);
 752                         if (rc != 0) {
 753                                 CERROR("Can't create route to %s via %s\n",
 754                                        libcfs_net2str(net),
 755                                        libcfs_nid2str(nid));
 756                                 goto out;
 757                         }
 758                 }
 759         }
 760
 761         myrc = 0;
 762         goto out;
 763
 764  token_error:
 765         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 766  out:
 767         lnet_free_text_bufs(&nets);
 768         lnet_free_text_bufs(&gateways);
 769         return myrc;
 770 }
 771
 772 static int
 773 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 774 {
 775         struct lnet_text_buf_t   *ltb;
 776
 777         while (!list_empty(tbs)) {
 778                 ltb = list_entry(tbs->next, struct lnet_text_buf_t, ltb_list);
 779
 780                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 781                         lnet_free_text_bufs(tbs);
 782                         return -EINVAL;
 783                 }
 784
 785                 list_del(&ltb->ltb_list);
 786                 lnet_free_text_buf(ltb);
 787         }
 788
 789         return 0;
 790 }
 791
 792 int
 793 lnet_parse_routes(char *routes, int *im_a_router)
 794 {
 795         struct list_head        tbs;
 796         int            rc = 0;
 797
 798         *im_a_router = 0;
 799
 800         INIT_LIST_HEAD(&tbs);
 801
 802         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 803                 CERROR("Error parsing routes\n");
 804                 rc = -EINVAL;
 805         } else {
 806                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 807         }
 808
 809         LASSERT(lnet_tbnob == 0);
 810         return rc;
 811 }
 812
 813 static int
 814 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 815 {
 816         LIST_HEAD(list);
 817         int             rc;
 818         int             i;
 819
 820         rc = cfs_ip_addr_parse(token, len, &list);
 821         if (rc != 0)
 822                 return rc;
 823
 824         for (rc = i = 0; !rc && i < nip; i++)
 825                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 826
 827         cfs_ip_addr_free(&list);
 828
 829         return rc;
 830 }
 831
 832 static int
 833 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 834 {
 835         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 836
 837         int   matched = 0;
 838         int   ntokens = 0;
 839         int   len;
 840         char *net = NULL;
 841         char *sep;
 842         char *token;
 843         int   rc;
 844
 845         LASSERT(strlen(net_entry) < sizeof(tokens));
 846
 847         /* work on a copy of the string */
 848         strcpy(tokens, net_entry);
 849         sep = tokens;
 850         for (;;) {
 851                 /* scan for token start */
 852                 while (isspace(*sep))
 853                         sep++;
 854                 if (*sep == 0)
 855                         break;
 856
 857                 token = sep++;
 858
 859                 /* scan for token end */
 860                 while (*sep != 0 && !isspace(*sep))
 861                         sep++;
 862                 if (*sep != 0)
 863                         *sep++ = 0;
 864
 865                 if (ntokens++ == 0) {
 866                         net = token;
 867                         continue;
 868                 }
 869
 870                 len = strlen(token);
 871
 872                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 873                 if (rc < 0) {
 874                         lnet_syntax("ip2nets", net_entry,
 875                                     (int)(token - tokens), len);
 876                         return rc;
 877                 }
 878
 879                 matched |= (rc != 0);
 880         }
 881
 882         if (!matched)
 883                 return 0;
 884
 885         strcpy(net_entry, net);          /* replace with matched net */
 886         return 1;
 887 }
 888
 889 static __u32
 890 lnet_netspec2net(char *netspec)
 891 {
 892         char   *bracket = strchr(netspec, '(');
 893         __u32   net;
 894
 895         if (bracket != NULL)
 896                 *bracket = 0;
 897
 898         net = libcfs_str2net(netspec);
 899
 900         if (bracket != NULL)
 901                 *bracket = '(';
 902
 903         return net;
 904 }
 905
 906 static int
 907 lnet_splitnets(char *source, struct list_head *nets)
 908 {
 909         int            offset = 0;
 910         int            offset2;
 911         int            len;
 912         struct lnet_text_buf_t  *tb;
 913         struct lnet_text_buf_t  *tb2;
 914         struct list_head       *t;
 915         char         *sep;
 916         char         *bracket;
 917         __u32        net;
 918
 919         LASSERT(!list_empty(nets));
 920         LASSERT(nets->next == nets->prev);     /* single entry */
 921
 922         tb = list_entry(nets->next, struct lnet_text_buf_t, ltb_list);
 923
 924         for (;;) {
 925                 sep = strchr(tb->ltb_text, ',');
 926                 bracket = strchr(tb->ltb_text, '(');
 927
 928                 if (sep != NULL &&
 929                     bracket != NULL &&
 930                     bracket < sep) {
 931                         /* netspec lists interfaces... */
 932
 933                         offset2 = offset + (int)(bracket - tb->ltb_text);
 934                         len = strlen(bracket);
 935
 936                         bracket = strchr(bracket + 1, ')');
 937
 938                         if (bracket == NULL ||
 939                             !(bracket[1] == ',' || bracket[1] == 0)) {
 940                                 lnet_syntax("ip2nets", source, offset2, len);
 941                                 return -EINVAL;
 942                         }
 943
 944                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
 945                 }
 946
 947                 if (sep != NULL)
 948                         *sep++ = 0;
 949
 950                 net = lnet_netspec2net(tb->ltb_text);
 951                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 952                         lnet_syntax("ip2nets", source, offset,
 953                                     strlen(tb->ltb_text));
 954                         return -EINVAL;
 955                 }
 956
 957                 list_for_each(t, nets) {
 958                         tb2 = list_entry(t, struct lnet_text_buf_t, ltb_list);
 959
 960                         if (tb2 == tb)
 961                                 continue;
 962
 963                         if (net == lnet_netspec2net(tb2->ltb_text)) {
 964                                 /* duplicate network */
 965                                 lnet_syntax("ip2nets", source, offset,
 966                                             strlen(tb->ltb_text));
 967                                 return -EINVAL;
 968                         }
 969                 }
 970
 971                 if (sep == NULL)
 972                         return 0;
 973
 974                 offset += (int)(sep - tb->ltb_text);
 975                 tb2 = lnet_new_text_buf(strlen(sep));
 976                 if (tb2 == NULL)
 977                         return -ENOMEM;
 978
 979                 strcpy(tb2->ltb_text, sep);
 980                 list_add_tail(&tb2->ltb_list, nets);
 981
 982                 tb = tb2;
 983         }
 984 }
 985
 986 static int
 987 lnet_match_networks(char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
 988 {
 989         static char     networks[LNET_SINGLE_TEXTBUF_NOB];
 990         static char     source[LNET_SINGLE_TEXTBUF_NOB];
 991
 992         struct list_head          raw_entries;
 993         struct list_head          matched_nets;
 994         struct list_head          current_nets;
 995         struct list_head         *t;
 996         struct list_head         *t2;
 997         struct lnet_text_buf_t    *tb;
 998         struct lnet_text_buf_t    *tb2;
 999         __u32          net1;
1000         __u32          net2;
1001         int              len;
1002         int              count;
1003         int              dup;
1004         int              rc;
1005
1006         INIT_LIST_HEAD(&raw_entries);
1007         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1008                 CERROR("Error parsing ip2nets\n");
1009                 LASSERT(lnet_tbnob == 0);
1010                 return -EINVAL;
1011         }
1012
1013         INIT_LIST_HEAD(&matched_nets);
1014         INIT_LIST_HEAD(&current_nets);
1015         networks[0] = 0;
1016         count = 0;
1017         len = 0;
1018         rc = 0;
1019
1020         while (!list_empty(&raw_entries)) {
1021                 tb = list_entry(raw_entries.next, struct lnet_text_buf_t,
1022                                     ltb_list);
1023
1024                 strncpy(source, tb->ltb_text, sizeof(source)-1);
1025                 source[sizeof(source)-1] = 0;
1026
1027                 /* replace ltb_text with the network(s) add on match */
1028                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1029                 if (rc < 0)
1030                         break;
1031
1032                 list_del(&tb->ltb_list);
1033
1034                 if (rc == 0) {            /* no match */
1035                         lnet_free_text_buf(tb);
1036                         continue;
1037                 }
1038
1039                 /* split into separate networks */
1040                 INIT_LIST_HEAD(&current_nets);
1041                 list_add(&tb->ltb_list, &current_nets);
1042                 rc = lnet_splitnets(source, &current_nets);
1043                 if (rc < 0)
1044                         break;
1045
1046                 dup = 0;
1047                 list_for_each(t, &current_nets) {
1048                         tb = list_entry(t, struct lnet_text_buf_t, ltb_list);
1049                         net1 = lnet_netspec2net(tb->ltb_text);
1050                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1051
1052                         list_for_each(t2, &matched_nets) {
1053                                 tb2 = list_entry(t2, struct lnet_text_buf_t,
1054                                                      ltb_list);
1055                                 net2 = lnet_netspec2net(tb2->ltb_text);
1056                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1057
1058                                 if (net1 == net2) {
1059                                         dup = 1;
1060                                         break;
1061                                 }
1062                         }
1063
1064                         if (dup)
1065                                 break;
1066                 }
1067
1068                 if (dup) {
1069                         lnet_free_text_bufs(&current_nets);
1070                         continue;
1071                 }
1072
1073                 list_for_each_safe(t, t2, &current_nets) {
1074                         tb = list_entry(t, struct lnet_text_buf_t, ltb_list);
1075
1076                         list_del(&tb->ltb_list);
1077                         list_add_tail(&tb->ltb_list, &matched_nets);
1078
1079                         len += snprintf(networks + len, sizeof(networks) - len,
1080                                         "%s%s", (len == 0) ? "" : ",",
1081                                         tb->ltb_text);
1082
1083                         if (len >= sizeof(networks)) {
1084                                 CERROR("Too many matched networks\n");
1085                                 rc = -E2BIG;
1086                                 goto out;
1087                         }
1088                 }
1089
1090                 count++;
1091         }
1092
1093  out:
1094         lnet_free_text_bufs(&raw_entries);
1095         lnet_free_text_bufs(&matched_nets);
1096         lnet_free_text_bufs(&current_nets);
1097         LASSERT(lnet_tbnob == 0);
1098
1099         if (rc < 0)
1100                 return rc;
1101
1102         *networksp = networks;
1103         return count;
1104 }
1105
1106 static void
1107 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1108 {
1109         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1110 }
1111
1112 static int
1113 lnet_ipaddr_enumerate(__u32 **ipaddrsp)
1114 {
1115         int     up;
1116         __u32      netmask;
1117         __u32     *ipaddrs;
1118         __u32     *ipaddrs2;
1119         int     nip;
1120         char     **ifnames;
1121         int     nif = libcfs_ipif_enumerate(&ifnames);
1122         int     i;
1123         int     rc;
1124
1125         if (nif <= 0)
1126                 return nif;
1127
1128         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1129         if (ipaddrs == NULL) {
1130                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1131                 libcfs_ipif_free_enumeration(ifnames, nif);
1132                 return -ENOMEM;
1133         }
1134
1135         for (i = nip = 0; i < nif; i++) {
1136                 if (!strcmp(ifnames[i], "lo"))
1137                         continue;
1138
1139                 rc = libcfs_ipif_query(ifnames[i], &up,
1140                                        &ipaddrs[nip], &netmask);
1141                 if (rc != 0) {
1142                         CWARN("Can't query interface %s: %d\n",
1143                               ifnames[i], rc);
1144                         continue;
1145                 }
1146
1147                 if (!up) {
1148                         CWARN("Ignoring interface %s: it's down\n",
1149                               ifnames[i]);
1150                         continue;
1151                 }
1152
1153                 nip++;
1154         }
1155
1156         libcfs_ipif_free_enumeration(ifnames, nif);
1157
1158         if (nip == nif) {
1159                 *ipaddrsp = ipaddrs;
1160         } else {
1161                 if (nip > 0) {
1162                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1163                         if (ipaddrs2 == NULL) {
1164                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1165                                 nip = -ENOMEM;
1166                         } else {
1167                                 memcpy(ipaddrs2, ipaddrs,
1168                                        nip * sizeof(*ipaddrs));
1169                                 *ipaddrsp = ipaddrs2;
1170                                 rc = nip;
1171                         }
1172                 }
1173                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1174         }
1175         return nip;
1176 }
1177
1178 int
1179 lnet_parse_ip2nets(char **networksp, char *ip2nets)
1180 {
1181         __u32     *ipaddrs = NULL;
1182         int     nip = lnet_ipaddr_enumerate(&ipaddrs);
1183         int     rc;
1184
1185         if (nip < 0) {
1186                 LCONSOLE_ERROR_MSG(0x117,
1187                                    "Error %d enumerating local IP interfaces for ip2nets to match\n",
1188                                    nip);
1189                 return nip;
1190         }
1191
1192         if (nip == 0) {
1193                 LCONSOLE_ERROR_MSG(0x118,
1194                                    "No local IP interfaces for ip2nets to match\n");
1195                 return -ENOENT;
1196         }
1197
1198         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1199         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1200
1201         if (rc < 0) {
1202                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1203                 return rc;
1204         }
1205
1206         if (rc == 0) {
1207                 LCONSOLE_ERROR_MSG(0x11a,
1208                                    "ip2nets does not match any local IP interfaces\n");
1209                 return -ENOENT;
1210         }
1211
1212         return 0;
1213 }
1214
1215 int
1216 lnet_set_ip_niaddr(lnet_ni_t *ni)
1217 {
1218         __u32  net = LNET_NIDNET(ni->ni_nid);
1219         char **names;
1220         int    n;
1221         __u32  ip;
1222         __u32  netmask;
1223         int    up;
1224         int    i;
1225         int    rc;
1226
1227         /* Convenience for LNDs that use the IP address of a local interface as
1228          * the local address part of their NID */
1229
1230         if (ni->ni_interfaces[0] != NULL) {
1231
1232                 CLASSERT(LNET_MAX_INTERFACES > 1);
1233
1234                 if (ni->ni_interfaces[1] != NULL) {
1235                         CERROR("Net %s doesn't support multiple interfaces\n",
1236                                libcfs_net2str(net));
1237                         return -EPERM;
1238                 }
1239
1240                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1241                                        &up, &ip, &netmask);
1242                 if (rc != 0) {
1243                         CERROR("Net %s can't query interface %s: %d\n",
1244                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1245                         return -EPERM;
1246                 }
1247
1248                 if (!up) {
1249                         CERROR("Net %s can't use interface %s: it's down\n",
1250                                libcfs_net2str(net), ni->ni_interfaces[0]);
1251                         return -ENETDOWN;
1252                 }
1253
1254                 ni->ni_nid = LNET_MKNID(net, ip);
1255                 return 0;
1256         }
1257
1258         n = libcfs_ipif_enumerate(&names);
1259         if (n <= 0) {
1260                 CERROR("Net %s can't enumerate interfaces: %d\n",
1261                        libcfs_net2str(net), n);
1262                 return 0;
1263         }
1264
1265         for (i = 0; i < n; i++) {
1266                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1267                         continue;
1268
1269                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1270
1271                 if (rc != 0) {
1272                         CWARN("Net %s can't query interface %s: %d\n",
1273                               libcfs_net2str(net), names[i], rc);
1274                         continue;
1275                 }
1276
1277                 if (!up) {
1278                         CWARN("Net %s ignoring interface %s (down)\n",
1279                               libcfs_net2str(net), names[i]);
1280                         continue;
1281                 }
1282
1283                 libcfs_ipif_free_enumeration(names, n);
1284                 ni->ni_nid = LNET_MKNID(net, ip);
1285                 return 0;
1286         }
1287
1288         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1289         libcfs_ipif_free_enumeration(names, n);
1290         return -ENOENT;
1291 }
1292 EXPORT_SYMBOL(lnet_set_ip_niaddr);