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 typedef struct {                            /* tmp struct for parsing routes */
  41         struct list_head         ltb_list;      /* stash on lists */
  42         int             ltb_size;       /* allocated size */
  43         char           ltb_text[0];     /* text buffer */
  44 } lnet_text_buf_t;
  45
  46 static int lnet_tbnob;                  /* 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 lnet_text_buf_t *
 369 lnet_new_text_buf(int str_len)
 370 {
 371         lnet_text_buf_t *ltb;
 372         int           nob;
 373
 374         /* NB allocate space for the terminating 0 */
 375         nob = offsetof(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(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         lnet_text_buf_t  *ltb;
 408
 409         while (!list_empty(tbs)) {
 410                 ltb = list_entry(tbs->next, 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         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         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, &stride, &scanned) < 3) {
 536
 537                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 538
 539                                 /* simple string enumeration */
 540                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 541                                                    parsed, (int)(enditem - parsed)) != 0)
 542                                         goto failed;
 543
 544                                 continue;
 545                         }
 546
 547                         stride = 1;
 548                 }
 549
 550                 /* range expansion */
 551
 552                 if (enditem != parsed + scanned) /* no trailing junk */
 553                         goto failed;
 554
 555                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
 556                     (hi - lo) % stride != 0)
 557                         goto failed;
 558
 559                 for (i = lo; i <= hi; i += stride) {
 560
 561                         snprintf(num, sizeof(num), "%d", i);
 562                         nob = strlen(num);
 563                         if (nob + 1 == sizeof(num))
 564                                 goto failed;
 565
 566                         if (lnet_expand1tb(&pending, str, sep, sep2,
 567                                            num, nob) != 0)
 568                                 goto failed;
 569                 }
 570         }
 571
 572         list_splice(&pending, tbs->prev);
 573         return 1;
 574
 575  failed:
 576         lnet_free_text_bufs(&pending);
 577         return -1;
 578 }
 579
 580 static int
 581 lnet_parse_hops(char *str, unsigned int *hops)
 582 {
 583         int     len = strlen(str);
 584         int     nob = len;
 585
 586         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
 587                 nob == len &&
 588                 *hops > 0 && *hops < 256);
 589 }
 590
 591 #define LNET_PRIORITY_SEPARATOR (':')
 592
 593 static int
 594 lnet_parse_priority(char *str, unsigned int *priority, char **token)
 595 {
 596         int   nob;
 597         char *sep;
 598         int   len;
 599
 600         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
 601         if (sep == NULL) {
 602                 *priority = 0;
 603                 return 0;
 604         }
 605         len = strlen(sep + 1);
 606
 607         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
 608                 /* Update the caller's token pointer so it treats the found
 609                    priority as the token to report in the error message. */
 610                 *token += sep - str + 1;
 611                 return -1;
 612         }
 613
 614         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
 615
 616         /*
 617          * Change priority separator to \0 to be able to parse NID
 618          */
 619         *sep = '\0';
 620         return 0;
 621 }
 622
 623 static int
 624 lnet_parse_route(char *str, int *im_a_router)
 625 {
 626         /* static scratch buffer OK (single threaded) */
 627         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
 628
 629         struct list_head        nets;
 630         struct list_head        gateways;
 631         struct list_head       *tmp1;
 632         struct list_head       *tmp2;
 633         __u32        net;
 634         lnet_nid_t      nid;
 635         lnet_text_buf_t  *ltb;
 636         int            rc;
 637         char         *sep;
 638         char         *token = str;
 639         int            ntokens = 0;
 640         int            myrc = -1;
 641         unsigned int      hops;
 642         int            got_hops = 0;
 643         unsigned int      priority = 0;
 644
 645         INIT_LIST_HEAD(&gateways);
 646         INIT_LIST_HEAD(&nets);
 647
 648         /* save a copy of the string for error messages */
 649         strncpy(cmd, str, sizeof(cmd) - 1);
 650         cmd[sizeof(cmd) - 1] = 0;
 651
 652         sep = str;
 653         for (;;) {
 654                 /* scan for token start */
 655                 while (isspace(*sep))
 656                         sep++;
 657                 if (*sep == 0) {
 658                         if (ntokens < (got_hops ? 3 : 2))
 659                                 goto token_error;
 660                         break;
 661                 }
 662
 663                 ntokens++;
 664                 token = sep++;
 665
 666                 /* scan for token end */
 667                 while (*sep != 0 && !isspace(*sep))
 668                         sep++;
 669                 if (*sep != 0)
 670                         *sep++ = 0;
 671
 672                 if (ntokens == 1) {
 673                         tmp2 = &nets;           /* expanding nets */
 674                 } else if (ntokens == 2 &&
 675                            lnet_parse_hops(token, &hops)) {
 676                         got_hops = 1;      /* got a hop count */
 677                         continue;
 678                 } else {
 679                         tmp2 = &gateways;       /* expanding gateways */
 680                 }
 681
 682                 ltb = lnet_new_text_buf(strlen(token));
 683                 if (ltb == NULL)
 684                         goto out;
 685
 686                 strcpy(ltb->ltb_text, token);
 687                 tmp1 = &ltb->ltb_list;
 688                 list_add_tail(tmp1, tmp2);
 689
 690                 while (tmp1 != tmp2) {
 691                         ltb = list_entry(tmp1, lnet_text_buf_t, ltb_list);
 692
 693                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
 694                         if (rc < 0)
 695                                 goto token_error;
 696
 697                         tmp1 = tmp1->next;
 698
 699                         if (rc > 0) {           /* expanded! */
 700                                 list_del(&ltb->ltb_list);
 701                                 lnet_free_text_buf(ltb);
 702                                 continue;
 703                         }
 704
 705                         if (ntokens == 1) {
 706                                 net = libcfs_str2net(ltb->ltb_text);
 707                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
 708                                     LNET_NETTYP(net) == LOLND)
 709                                         goto token_error;
 710                         } else {
 711                                 rc = lnet_parse_priority(ltb->ltb_text,
 712                                                          &priority, &token);
 713                                 if (rc < 0)
 714                                         goto token_error;
 715
 716                                 nid = libcfs_str2nid(ltb->ltb_text);
 717                                 if (nid == LNET_NID_ANY ||
 718                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
 719                                         goto token_error;
 720                         }
 721                 }
 722         }
 723
 724         if (!got_hops)
 725                 hops = 1;
 726
 727         LASSERT(!list_empty(&nets));
 728         LASSERT(!list_empty(&gateways));
 729
 730         list_for_each(tmp1, &nets) {
 731                 ltb = list_entry(tmp1, lnet_text_buf_t, ltb_list);
 732                 net = libcfs_str2net(ltb->ltb_text);
 733                 LASSERT(net != LNET_NIDNET(LNET_NID_ANY));
 734
 735                 list_for_each(tmp2, &gateways) {
 736                         ltb = list_entry(tmp2, lnet_text_buf_t, ltb_list);
 737                         nid = libcfs_str2nid(ltb->ltb_text);
 738                         LASSERT(nid != LNET_NID_ANY);
 739
 740                         if (lnet_islocalnid(nid)) {
 741                                 *im_a_router = 1;
 742                                 continue;
 743                         }
 744
 745                         rc = lnet_add_route(net, hops, nid, priority);
 746                         if (rc != 0) {
 747                                 CERROR("Can't create route to %s via %s\n",
 748                                        libcfs_net2str(net),
 749                                        libcfs_nid2str(nid));
 750                                 goto out;
 751                         }
 752                 }
 753         }
 754
 755         myrc = 0;
 756         goto out;
 757
 758  token_error:
 759         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
 760  out:
 761         lnet_free_text_bufs(&nets);
 762         lnet_free_text_bufs(&gateways);
 763         return myrc;
 764 }
 765
 766 static int
 767 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
 768 {
 769         lnet_text_buf_t   *ltb;
 770
 771         while (!list_empty(tbs)) {
 772                 ltb = list_entry(tbs->next, lnet_text_buf_t, ltb_list);
 773
 774                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
 775                         lnet_free_text_bufs(tbs);
 776                         return -EINVAL;
 777                 }
 778
 779                 list_del(&ltb->ltb_list);
 780                 lnet_free_text_buf(ltb);
 781         }
 782
 783         return 0;
 784 }
 785
 786 int
 787 lnet_parse_routes(char *routes, int *im_a_router)
 788 {
 789         struct list_head        tbs;
 790         int            rc = 0;
 791
 792         *im_a_router = 0;
 793
 794         INIT_LIST_HEAD(&tbs);
 795
 796         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
 797                 CERROR("Error parsing routes\n");
 798                 rc = -EINVAL;
 799         } else {
 800                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
 801         }
 802
 803         LASSERT(lnet_tbnob == 0);
 804         return rc;
 805 }
 806
 807 static int
 808 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
 809 {
 810         LIST_HEAD(list);
 811         int             rc;
 812         int             i;
 813
 814         rc = cfs_ip_addr_parse(token, len, &list);
 815         if (rc != 0)
 816                 return rc;
 817
 818         for (rc = i = 0; !rc && i < nip; i++)
 819                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
 820
 821         cfs_ip_addr_free(&list);
 822
 823         return rc;
 824 }
 825
 826 static int
 827 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
 828 {
 829         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
 830
 831         int   matched = 0;
 832         int   ntokens = 0;
 833         int   len;
 834         char *net = NULL;
 835         char *sep;
 836         char *token;
 837         int   rc;
 838
 839         LASSERT(strlen(net_entry) < sizeof(tokens));
 840
 841         /* work on a copy of the string */
 842         strcpy(tokens, net_entry);
 843         sep = tokens;
 844         for (;;) {
 845                 /* scan for token start */
 846                 while (isspace(*sep))
 847                         sep++;
 848                 if (*sep == 0)
 849                         break;
 850
 851                 token = sep++;
 852
 853                 /* scan for token end */
 854                 while (*sep != 0 && !isspace(*sep))
 855                         sep++;
 856                 if (*sep != 0)
 857                         *sep++ = 0;
 858
 859                 if (ntokens++ == 0) {
 860                         net = token;
 861                         continue;
 862                 }
 863
 864                 len = strlen(token);
 865
 866                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
 867                 if (rc < 0) {
 868                         lnet_syntax("ip2nets", net_entry,
 869                                     (int)(token - tokens), len);
 870                         return rc;
 871                 }
 872
 873                 matched |= (rc != 0);
 874         }
 875
 876         if (!matched)
 877                 return 0;
 878
 879         strcpy(net_entry, net);          /* replace with matched net */
 880         return 1;
 881 }
 882
 883 static __u32
 884 lnet_netspec2net(char *netspec)
 885 {
 886         char   *bracket = strchr(netspec, '(');
 887         __u32   net;
 888
 889         if (bracket != NULL)
 890                 *bracket = 0;
 891
 892         net = libcfs_str2net(netspec);
 893
 894         if (bracket != NULL)
 895                 *bracket = '(';
 896
 897         return net;
 898 }
 899
 900 static int
 901 lnet_splitnets(char *source, struct list_head *nets)
 902 {
 903         int            offset = 0;
 904         int            offset2;
 905         int            len;
 906         lnet_text_buf_t  *tb;
 907         lnet_text_buf_t  *tb2;
 908         struct list_head       *t;
 909         char         *sep;
 910         char         *bracket;
 911         __u32        net;
 912
 913         LASSERT(!list_empty(nets));
 914         LASSERT(nets->next == nets->prev);     /* single entry */
 915
 916         tb = list_entry(nets->next, lnet_text_buf_t, ltb_list);
 917
 918         for (;;) {
 919                 sep = strchr(tb->ltb_text, ',');
 920                 bracket = strchr(tb->ltb_text, '(');
 921
 922                 if (sep != NULL &&
 923                     bracket != NULL &&
 924                     bracket < sep) {
 925                         /* netspec lists interfaces... */
 926
 927                         offset2 = offset + (int)(bracket - tb->ltb_text);
 928                         len = strlen(bracket);
 929
 930                         bracket = strchr(bracket + 1, ')');
 931
 932                         if (bracket == NULL ||
 933                             !(bracket[1] == ',' || bracket[1] == 0)) {
 934                                 lnet_syntax("ip2nets", source, offset2, len);
 935                                 return -EINVAL;
 936                         }
 937
 938                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
 939                 }
 940
 941                 if (sep != NULL)
 942                         *sep++ = 0;
 943
 944                 net = lnet_netspec2net(tb->ltb_text);
 945                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 946                         lnet_syntax("ip2nets", source, offset,
 947                                     strlen(tb->ltb_text));
 948                         return -EINVAL;
 949                 }
 950
 951                 list_for_each(t, nets) {
 952                         tb2 = list_entry(t, lnet_text_buf_t, ltb_list);
 953
 954                         if (tb2 == tb)
 955                                 continue;
 956
 957                         if (net == lnet_netspec2net(tb2->ltb_text)) {
 958                                 /* duplicate network */
 959                                 lnet_syntax("ip2nets", source, offset,
 960                                             strlen(tb->ltb_text));
 961                                 return -EINVAL;
 962                         }
 963                 }
 964
 965                 if (sep == NULL)
 966                         return 0;
 967
 968                 offset += (int)(sep - tb->ltb_text);
 969                 tb2 = lnet_new_text_buf(strlen(sep));
 970                 if (tb2 == NULL)
 971                         return -ENOMEM;
 972
 973                 strcpy(tb2->ltb_text, sep);
 974                 list_add_tail(&tb2->ltb_list, nets);
 975
 976                 tb = tb2;
 977         }
 978 }
 979
 980 static int
 981 lnet_match_networks(char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
 982 {
 983         static char     networks[LNET_SINGLE_TEXTBUF_NOB];
 984         static char     source[LNET_SINGLE_TEXTBUF_NOB];
 985
 986         struct list_head          raw_entries;
 987         struct list_head          matched_nets;
 988         struct list_head          current_nets;
 989         struct list_head         *t;
 990         struct list_head         *t2;
 991         lnet_text_buf_t    *tb;
 992         lnet_text_buf_t    *tb2;
 993         __u32          net1;
 994         __u32          net2;
 995         int              len;
 996         int              count;
 997         int              dup;
 998         int              rc;
 999
1000         INIT_LIST_HEAD(&raw_entries);
1001         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1002                 CERROR("Error parsing ip2nets\n");
1003                 LASSERT(lnet_tbnob == 0);
1004                 return -EINVAL;
1005         }
1006
1007         INIT_LIST_HEAD(&matched_nets);
1008         INIT_LIST_HEAD(&current_nets);
1009         networks[0] = 0;
1010         count = 0;
1011         len = 0;
1012         rc = 0;
1013
1014         while (!list_empty(&raw_entries)) {
1015                 tb = list_entry(raw_entries.next, lnet_text_buf_t,
1016                                     ltb_list);
1017
1018                 strncpy(source, tb->ltb_text, sizeof(source)-1);
1019                 source[sizeof(source)-1] = 0;
1020
1021                 /* replace ltb_text with the network(s) add on match */
1022                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1023                 if (rc < 0)
1024                         break;
1025
1026                 list_del(&tb->ltb_list);
1027
1028                 if (rc == 0) {            /* no match */
1029                         lnet_free_text_buf(tb);
1030                         continue;
1031                 }
1032
1033                 /* split into separate networks */
1034                 INIT_LIST_HEAD(&current_nets);
1035                 list_add(&tb->ltb_list, &current_nets);
1036                 rc = lnet_splitnets(source, &current_nets);
1037                 if (rc < 0)
1038                         break;
1039
1040                 dup = 0;
1041                 list_for_each(t, &current_nets) {
1042                         tb = list_entry(t, lnet_text_buf_t, ltb_list);
1043                         net1 = lnet_netspec2net(tb->ltb_text);
1044                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1045
1046                         list_for_each(t2, &matched_nets) {
1047                                 tb2 = list_entry(t2, lnet_text_buf_t,
1048                                                      ltb_list);
1049                                 net2 = lnet_netspec2net(tb2->ltb_text);
1050                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1051
1052                                 if (net1 == net2) {
1053                                         dup = 1;
1054                                         break;
1055                                 }
1056                         }
1057
1058                         if (dup)
1059                                 break;
1060                 }
1061
1062                 if (dup) {
1063                         lnet_free_text_bufs(&current_nets);
1064                         continue;
1065                 }
1066
1067                 list_for_each_safe(t, t2, &current_nets) {
1068                         tb = list_entry(t, lnet_text_buf_t, ltb_list);
1069
1070                         list_del(&tb->ltb_list);
1071                         list_add_tail(&tb->ltb_list, &matched_nets);
1072
1073                         len += snprintf(networks + len, sizeof(networks) - len,
1074                                         "%s%s", (len == 0) ? "" : ",",
1075                                         tb->ltb_text);
1076
1077                         if (len >= sizeof(networks)) {
1078                                 CERROR("Too many matched networks\n");
1079                                 rc = -E2BIG;
1080                                 goto out;
1081                         }
1082                 }
1083
1084                 count++;
1085         }
1086
1087  out:
1088         lnet_free_text_bufs(&raw_entries);
1089         lnet_free_text_bufs(&matched_nets);
1090         lnet_free_text_bufs(&current_nets);
1091         LASSERT(lnet_tbnob == 0);
1092
1093         if (rc < 0)
1094                 return rc;
1095
1096         *networksp = networks;
1097         return count;
1098 }
1099
1100 static void
1101 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1102 {
1103         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1104 }
1105
1106 static int
1107 lnet_ipaddr_enumerate(__u32 **ipaddrsp)
1108 {
1109         int     up;
1110         __u32      netmask;
1111         __u32     *ipaddrs;
1112         __u32     *ipaddrs2;
1113         int     nip;
1114         char     **ifnames;
1115         int     nif = libcfs_ipif_enumerate(&ifnames);
1116         int     i;
1117         int     rc;
1118
1119         if (nif <= 0)
1120                 return nif;
1121
1122         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1123         if (ipaddrs == NULL) {
1124                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1125                 libcfs_ipif_free_enumeration(ifnames, nif);
1126                 return -ENOMEM;
1127         }
1128
1129         for (i = nip = 0; i < nif; i++) {
1130                 if (!strcmp(ifnames[i], "lo"))
1131                         continue;
1132
1133                 rc = libcfs_ipif_query(ifnames[i], &up,
1134                                        &ipaddrs[nip], &netmask);
1135                 if (rc != 0) {
1136                         CWARN("Can't query interface %s: %d\n",
1137                               ifnames[i], rc);
1138                         continue;
1139                 }
1140
1141                 if (!up) {
1142                         CWARN("Ignoring interface %s: it's down\n",
1143                               ifnames[i]);
1144                         continue;
1145                 }
1146
1147                 nip++;
1148         }
1149
1150         libcfs_ipif_free_enumeration(ifnames, nif);
1151
1152         if (nip == nif) {
1153                 *ipaddrsp = ipaddrs;
1154         } else {
1155                 if (nip > 0) {
1156                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1157                         if (ipaddrs2 == NULL) {
1158                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1159                                 nip = -ENOMEM;
1160                         } else {
1161                                 memcpy(ipaddrs2, ipaddrs,
1162                                        nip * sizeof(*ipaddrs));
1163                                 *ipaddrsp = ipaddrs2;
1164                                 rc = nip;
1165                         }
1166                 }
1167                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1168         }
1169         return nip;
1170 }
1171
1172 int
1173 lnet_parse_ip2nets(char **networksp, char *ip2nets)
1174 {
1175         __u32     *ipaddrs = NULL;
1176         int     nip = lnet_ipaddr_enumerate(&ipaddrs);
1177         int     rc;
1178
1179         if (nip < 0) {
1180                 LCONSOLE_ERROR_MSG(0x117,
1181                                    "Error %d enumerating local IP interfaces for ip2nets to match\n",
1182                                    nip);
1183                 return nip;
1184         }
1185
1186         if (nip == 0) {
1187                 LCONSOLE_ERROR_MSG(0x118,
1188                                    "No local IP interfaces for ip2nets to match\n");
1189                 return -ENOENT;
1190         }
1191
1192         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1193         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1194
1195         if (rc < 0) {
1196                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1197                 return rc;
1198         }
1199
1200         if (rc == 0) {
1201                 LCONSOLE_ERROR_MSG(0x11a,
1202                                    "ip2nets does not match any local IP interfaces\n");
1203                 return -ENOENT;
1204         }
1205
1206         return 0;
1207 }
1208
1209 int
1210 lnet_set_ip_niaddr(lnet_ni_t *ni)
1211 {
1212         __u32  net = LNET_NIDNET(ni->ni_nid);
1213         char **names;
1214         int    n;
1215         __u32  ip;
1216         __u32  netmask;
1217         int    up;
1218         int    i;
1219         int    rc;
1220
1221         /* Convenience for LNDs that use the IP address of a local interface as
1222          * the local address part of their NID */
1223
1224         if (ni->ni_interfaces[0] != NULL) {
1225
1226                 CLASSERT(LNET_MAX_INTERFACES > 1);
1227
1228                 if (ni->ni_interfaces[1] != NULL) {
1229                         CERROR("Net %s doesn't support multiple interfaces\n",
1230                                libcfs_net2str(net));
1231                         return -EPERM;
1232                 }
1233
1234                 rc = libcfs_ipif_query(ni->ni_interfaces[0],
1235                                        &up, &ip, &netmask);
1236                 if (rc != 0) {
1237                         CERROR("Net %s can't query interface %s: %d\n",
1238                                libcfs_net2str(net), ni->ni_interfaces[0], rc);
1239                         return -EPERM;
1240                 }
1241
1242                 if (!up) {
1243                         CERROR("Net %s can't use interface %s: it's down\n",
1244                                libcfs_net2str(net), ni->ni_interfaces[0]);
1245                         return -ENETDOWN;
1246                 }
1247
1248                 ni->ni_nid = LNET_MKNID(net, ip);
1249                 return 0;
1250         }
1251
1252         n = libcfs_ipif_enumerate(&names);
1253         if (n <= 0) {
1254                 CERROR("Net %s can't enumerate interfaces: %d\n",
1255                        libcfs_net2str(net), n);
1256                 return 0;
1257         }
1258
1259         for (i = 0; i < n; i++) {
1260                 if (!strcmp(names[i], "lo")) /* skip the loopback IF */
1261                         continue;
1262
1263                 rc = libcfs_ipif_query(names[i], &up, &ip, &netmask);
1264
1265                 if (rc != 0) {
1266                         CWARN("Net %s can't query interface %s: %d\n",
1267                               libcfs_net2str(net), names[i], rc);
1268                         continue;
1269                 }
1270
1271                 if (!up) {
1272                         CWARN("Net %s ignoring interface %s (down)\n",
1273                               libcfs_net2str(net), names[i]);
1274                         continue;
1275                 }
1276
1277                 libcfs_ipif_free_enumeration(names, n);
1278                 ni->ni_nid = LNET_MKNID(net, ip);
1279                 return 0;
1280         }
1281
1282         CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net));
1283         libcfs_ipif_free_enumeration(names, n);
1284         return -ENOENT;
1285 }
1286 EXPORT_SYMBOL(lnet_set_ip_niaddr);