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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_LNET
  34 #include <linux/nsproxy.h>
  35 #include <net/net_namespace.h>
  36 #include <lnet/lib-lnet.h>
  37
  38 /* tmp struct for parsing routes */
  39 struct lnet_text_buf {
  40         struct list_head        ltb_list;       /* stash on lists */
  41         int                     ltb_size;       /* allocated size */
  42         char                    ltb_text[0];    /* text buffer */
  43 };
  44
  45 static int lnet_tbnob = 0;                      /* track text buf allocation */
  46 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  47 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  48
  49 #define SPACESTR " \t\v\r\n"
  50 #define DELIMITERS ":()[]"
  51
  52 static void
  53 lnet_syntax(const char *name, const char *str, int offset, int width)
  54 {
  55         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  56         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  57
  58         memset(dots, '.', sizeof(dots));
  59         dots[sizeof(dots)-1] = 0;
  60         memset(dashes, '-', sizeof(dashes));
  61         dashes[sizeof(dashes)-1] = 0;
  62
  63         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  64         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  65                            (int)strlen(name), dots, offset, dots,
  66                             (width < 1) ? 0 : width - 1, dashes);
  67 }
  68
  69 static int
  70 lnet_issep (char c)
  71 {
  72         switch (c) {
  73         case '\n':
  74         case '\r':
  75         case ';':
  76                 return 1;
  77         default:
  78                 return 0;
  79         }
  80 }
  81
  82 bool
  83 lnet_net_unique(__u32 net_id, struct list_head *netlist,
  84                 struct lnet_net **net)
  85 {
  86         struct lnet_net  *net_l;
  87
  88         if (!netlist)
  89                 return true;
  90
  91         list_for_each_entry(net_l, netlist, net_list) {
  92                 if (net_l->net_id == net_id) {
  93                         if (net != NULL)
  94                                 *net = net_l;
  95                         return false;
  96                 }
  97         }
  98
  99         return true;
 100 }
 101
 102 /* check that the NI is unique within the list of NIs already added to
 103  * a network */
 104 bool
 105 lnet_ni_unique_net(struct list_head *nilist, char *iface)
 106 {
 107         struct list_head *tmp;
 108         struct lnet_ni *ni;
 109
 110         list_for_each(tmp, nilist) {
 111                 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
 112
 113                 if (ni->ni_interfaces[0] != NULL &&
 114                     strncmp(ni->ni_interfaces[0], iface, strlen(iface)) == 0)
 115                         return false;
 116         }
 117
 118         return true;
 119 }
 120
 121 /* check that the NI is unique to the interfaces with in the same NI.
 122  * This is only a consideration if use_tcp_bonding is set */
 123 static bool
 124 lnet_ni_unique_ni(char *iface_list[LNET_MAX_INTERFACES], char *iface)
 125 {
 126         int i;
 127         for (i = 0; i < LNET_MAX_INTERFACES; i++) {
 128                 if (iface_list[i] != NULL &&
 129                     strncmp(iface_list[i], iface, strlen(iface)) == 0)
 130                         return false;
 131         }
 132
 133         return true;
 134 }
 135
 136 static bool
 137 in_array(__u32 *array, __u32 size, __u32 value)
 138 {
 139         int i;
 140
 141         for (i = 0; i < size; i++) {
 142                 if (array[i] == value)
 143                         return false;
 144         }
 145
 146         return true;
 147 }
 148
 149 static int
 150 lnet_net_append_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
 151 {
 152         __u32 *added_cpts = NULL;
 153         int i, j = 0, rc = 0;
 154
 155         /*
 156          * no need to go futher since a subset of the NIs already exist on
 157          * all CPTs
 158          */
 159         if (net->net_ncpts == LNET_CPT_NUMBER)
 160                 return 0;
 161
 162         if (cpts == NULL) {
 163                 /* there is an NI which will exist on all CPTs */
 164                 if (net->net_cpts != NULL)
 165                         LIBCFS_FREE(net->net_cpts, sizeof(*net->net_cpts) *
 166                                     net->net_ncpts);
 167                 net->net_cpts = NULL;
 168                 net->net_ncpts = LNET_CPT_NUMBER;
 169                 return 0;
 170         }
 171
 172         if (net->net_cpts == NULL) {
 173                 LIBCFS_ALLOC(net->net_cpts, sizeof(*net->net_cpts) * ncpts);
 174                 if (net->net_cpts == NULL)
 175                         return -ENOMEM;
 176                 memcpy(net->net_cpts, cpts, ncpts);
 177                 net->net_ncpts = ncpts;
 178                 return 0;
 179         }
 180
 181         LIBCFS_ALLOC(added_cpts, sizeof(*added_cpts) * LNET_CPT_NUMBER);
 182         if (added_cpts == NULL)
 183                 return -ENOMEM;
 184
 185         for (i = 0; i < ncpts; i++) {
 186                 if (!in_array(net->net_cpts, net->net_ncpts, cpts[i])) {
 187                         added_cpts[j] = cpts[i];
 188                         j++;
 189                 }
 190         }
 191
 192         /* append the new cpts if any to the list of cpts in the net */
 193         if (j > 0) {
 194                 __u32 *array = NULL, *loc;
 195                 __u32 total_entries = j + net->net_ncpts;
 196
 197                 LIBCFS_ALLOC(array, sizeof(*net->net_cpts) * total_entries);
 198                 if (array == NULL) {
 199                         rc = -ENOMEM;
 200                         goto failed;
 201                 }
 202
 203                 memcpy(array, net->net_cpts, net->net_ncpts);
 204                 loc = array + net->net_ncpts;
 205                 memcpy(loc, added_cpts, j);
 206
 207                 LIBCFS_FREE(net->net_cpts, sizeof(*net->net_cpts) *
 208                             net->net_ncpts);
 209                 net->net_ncpts = total_entries;
 210                 net->net_cpts = array;
 211         }
 212
 213 failed:
 214         LIBCFS_FREE(added_cpts, sizeof(*added_cpts) * LNET_CPT_NUMBER);
 215
 216         return rc;
 217 }
 218
 219 static void
 220 lnet_net_remove_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
 221 {
 222         struct lnet_ni *ni;
 223         int rc;
 224
 225         /*
 226          * Operation Assumption:
 227          *      This function is called after an NI has been removed from
 228          *      its parent net.
 229          *
 230          * if we're removing an NI which exists on all CPTs then
 231          * we have to check if any of the other NIs on this net also
 232          * exists on all CPTs. If none, then we need to build our Net CPT
 233          * list based on the remaining NIs.
 234          *
 235          * If the NI being removed exist on a subset of the CPTs then we
 236          * alo rebuild the Net CPT list based on the remaining NIs, which
 237          * should resutl in the expected Net CPT list.
 238          */
 239
 240         /*
 241          * sometimes this function can be called due to some failure
 242          * creating an NI, before any of the cpts are allocated, so check
 243          * for that case and don't do anything
 244          */
 245         if (ncpts == 0)
 246                 return;
 247
 248         if (ncpts == LNET_CPT_NUMBER) {
 249                 /*
 250                  * first iteration through the NI list in the net to see
 251                  * if any of the NIs exist on all the CPTs. If one is
 252                  * found then our job is done.
 253                  */
 254                 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 255                         if (ni->ni_ncpts == LNET_CPT_NUMBER)
 256                                 return;
 257                 }
 258         }
 259
 260         /*
 261          * Rebuild the Net CPT list again, thereby only including only the
 262          * CPTs which the remaining NIs are associated with.
 263          */
 264         if (net->net_cpts != NULL) {
 265                 LIBCFS_FREE(net->net_cpts,
 266                         sizeof(*net->net_cpts) * net->net_ncpts);
 267                 net->net_cpts = NULL;
 268         }
 269
 270         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 271                 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts,
 272                                           net);
 273                 if (rc != 0) {
 274                         CERROR("Out of Memory\n");
 275                         /*
 276                          * do our best to keep on going. Delete
 277                          * the net cpts and set it to NULL. This
 278                          * way we can keep on going but less
 279                          * efficiently, since memory accesses might be
 280                          * accross CPT lines.
 281                          */
 282                         if (net->net_cpts != NULL) {
 283                                 LIBCFS_FREE(net->net_cpts,
 284                                                 sizeof(*net->net_cpts) *
 285                                                 net->net_ncpts);
 286                                 net->net_cpts = NULL;
 287                                 net->net_ncpts = LNET_CPT_NUMBER;
 288                         }
 289                         return;
 290                 }
 291         }
 292 }
 293
 294 void
 295 lnet_ni_free(struct lnet_ni *ni)
 296 {
 297         int i;
 298
 299         lnet_net_remove_cpts(ni->ni_cpts, ni->ni_ncpts, ni->ni_net);
 300
 301         if (ni->ni_refs != NULL)
 302                 cfs_percpt_free(ni->ni_refs);
 303
 304         if (ni->ni_tx_queues != NULL)
 305                 cfs_percpt_free(ni->ni_tx_queues);
 306
 307         if (ni->ni_cpts != NULL)
 308                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 309
 310         for (i = 0; i < LNET_MAX_INTERFACES &&
 311                     ni->ni_interfaces[i] != NULL; i++) {
 312                 LIBCFS_FREE(ni->ni_interfaces[i],
 313                             strlen(ni->ni_interfaces[i]) + 1);
 314         }
 315
 316         /* release reference to net namespace */
 317         if (ni->ni_net_ns != NULL)
 318                 put_net(ni->ni_net_ns);
 319
 320         LIBCFS_FREE(ni, sizeof(*ni));
 321 }
 322
 323 void
 324 lnet_net_free(struct lnet_net *net)
 325 {
 326         struct list_head *tmp, *tmp2;
 327         struct lnet_ni *ni;
 328
 329         LASSERT(list_empty(&net->net_ni_zombie));
 330
 331         /*
 332          * delete any nis that haven't been added yet. This could happen
 333          * if there is a failure on net startup
 334          */
 335         list_for_each_safe(tmp, tmp2, &net->net_ni_added) {
 336                 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
 337                 list_del_init(&ni->ni_netlist);
 338                 lnet_ni_free(ni);
 339         }
 340
 341         /* delete any nis which have been started. */
 342         list_for_each_safe(tmp, tmp2, &net->net_ni_list) {
 343                 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
 344                 list_del_init(&ni->ni_netlist);
 345                 lnet_ni_free(ni);
 346         }
 347
 348         if (net->net_cpts != NULL)
 349                 LIBCFS_FREE(net->net_cpts,
 350                             sizeof(*net->net_cpts) * net->net_ncpts);
 351
 352         LIBCFS_FREE(net, sizeof(*net));
 353 }
 354
 355 struct lnet_net *
 356 lnet_net_alloc(__u32 net_id, struct list_head *net_list)
 357 {
 358         struct lnet_net         *net;
 359
 360         if (!lnet_net_unique(net_id, net_list, NULL)) {
 361                 CERROR("Duplicate net %s. Ignore\n",
 362                        libcfs_net2str(net_id));
 363                 return NULL;
 364         }
 365
 366         LIBCFS_ALLOC(net, sizeof(*net));
 367         if (net == NULL) {
 368                 CERROR("Out of memory creating network %s\n",
 369                        libcfs_net2str(net_id));
 370                 return NULL;
 371         }
 372
 373         INIT_LIST_HEAD(&net->net_list);
 374         INIT_LIST_HEAD(&net->net_ni_list);
 375         INIT_LIST_HEAD(&net->net_ni_added);
 376         INIT_LIST_HEAD(&net->net_ni_zombie);
 377
 378         net->net_id = net_id;
 379         net->net_state = LNET_NET_STATE_INIT;
 380
 381         /* initialize global paramters to undefiend */
 382         net->net_tunables.lct_peer_timeout = -1;
 383         net->net_tunables.lct_max_tx_credits = -1;
 384         net->net_tunables.lct_peer_tx_credits = -1;
 385         net->net_tunables.lct_peer_rtr_credits = -1;
 386
 387         if (net_list)
 388                 list_add_tail(&net->net_list, net_list);
 389
 390         return net;
 391 }
 392
 393 static int
 394 lnet_ni_add_interface(struct lnet_ni *ni, char *iface)
 395 {
 396         int niface = 0;
 397
 398         if (ni == NULL)
 399                 return -ENOMEM;
 400
 401         if (!lnet_ni_unique_ni(ni->ni_interfaces, iface))
 402                 return -EINVAL;
 403
 404         /* Allocate a separate piece of memory and copy
 405          * into it the string, so we don't have
 406          * a depencency on the tokens string.  This way we
 407          * can free the tokens at the end of the function.
 408          * The newly allocated ni_interfaces[] can be
 409          * freed when freeing the NI */
 410         while (niface < LNET_MAX_INTERFACES &&
 411                ni->ni_interfaces[niface] != NULL)
 412                 niface++;
 413
 414         if (niface >= LNET_MAX_INTERFACES) {
 415                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 416                                    "for net %s\n",
 417                                    libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
 418                 return -EINVAL;
 419         }
 420
 421         LIBCFS_ALLOC(ni->ni_interfaces[niface],
 422                      strlen(iface) + 1);
 423
 424         if (ni->ni_interfaces[niface] == NULL) {
 425                 CERROR("Can't allocate net interface name\n");
 426                 return -ENOMEM;
 427         }
 428
 429         strncpy(ni->ni_interfaces[niface], iface,
 430                 strlen(iface) + 1);
 431
 432         return 0;
 433 }
 434
 435 static struct lnet_ni *
 436 lnet_ni_alloc_common(struct lnet_net *net, char *iface)
 437 {
 438         struct lnet_tx_queue    *tq;
 439         struct lnet_ni          *ni;
 440         int                     i;
 441
 442         if (iface != NULL)
 443                 /* make sure that this NI is unique in the net it's
 444                  * being added to */
 445                 if (!lnet_ni_unique_net(&net->net_ni_added, iface))
 446                         return NULL;
 447
 448         LIBCFS_ALLOC(ni, sizeof(*ni));
 449         if (ni == NULL) {
 450                 CERROR("Out of memory creating network interface %s%s\n",
 451                        libcfs_net2str(net->net_id),
 452                        (iface != NULL) ? iface : "");
 453                 return NULL;
 454         }
 455
 456         spin_lock_init(&ni->ni_lock);
 457         INIT_LIST_HEAD(&ni->ni_cptlist);
 458         INIT_LIST_HEAD(&ni->ni_netlist);
 459         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 460                                        sizeof(*ni->ni_refs[0]));
 461         if (ni->ni_refs == NULL)
 462                 goto failed;
 463
 464         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 465                                             sizeof(*ni->ni_tx_queues[0]));
 466         if (ni->ni_tx_queues == NULL)
 467                 goto failed;
 468
 469         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 470                 INIT_LIST_HEAD(&tq->tq_delayed);
 471
 472         ni->ni_net = net;
 473         /* LND will fill in the address part of the NID */
 474         ni->ni_nid = LNET_MKNID(net->net_id, 0);
 475
 476         /* Store net namespace in which current ni is being created */
 477         if (current->nsproxy->net_ns != NULL)
 478                 ni->ni_net_ns = get_net(current->nsproxy->net_ns);
 479         else
 480                 ni->ni_net_ns = NULL;
 481
 482         ni->ni_last_alive = ktime_get_real_seconds();
 483         ni->ni_state = LNET_NI_STATE_INIT;
 484         list_add_tail(&ni->ni_netlist, &net->net_ni_added);
 485
 486         /*
 487          * if an interface name is provided then make sure to add in that
 488          * interface name in NI
 489          */
 490         if (iface)
 491                 if (lnet_ni_add_interface(ni, iface) != 0)
 492                         goto failed;
 493
 494         return ni;
 495 failed:
 496         lnet_ni_free(ni);
 497         return NULL;
 498 }
 499
 500 /* allocate and add to the provided network */
 501 struct lnet_ni *
 502 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el, char *iface)
 503 {
 504         struct lnet_ni          *ni;
 505         int                     rc;
 506
 507         ni = lnet_ni_alloc_common(net, iface);
 508         if (!ni)
 509                 return NULL;
 510
 511         if (!el) {
 512                 ni->ni_cpts  = NULL;
 513                 ni->ni_ncpts = LNET_CPT_NUMBER;
 514         } else {
 515                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 516                 if (rc <= 0) {
 517                         CERROR("Failed to set CPTs for NI %s(%s): %d\n",
 518                                libcfs_net2str(net->net_id),
 519                                (iface != NULL) ? iface : "", rc);
 520                         goto failed;
 521                 }
 522
 523                 LASSERT(rc <= LNET_CPT_NUMBER);
 524                 if (rc == LNET_CPT_NUMBER) {
 525                         LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0]));
 526                         ni->ni_cpts = NULL;
 527                 }
 528
 529                 ni->ni_ncpts = rc;
 530         }
 531
 532         rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
 533         if (rc != 0)
 534                 goto failed;
 535
 536         return ni;
 537 failed:
 538         lnet_ni_free(ni);
 539         return NULL;
 540 }
 541
 542 struct lnet_ni *
 543 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
 544                           char *iface)
 545 {
 546         struct lnet_ni          *ni;
 547         int                     rc;
 548
 549         ni = lnet_ni_alloc_common(net, iface);
 550         if (!ni)
 551                 return NULL;
 552
 553         if (ncpts == 0) {
 554                 ni->ni_cpts  = NULL;
 555                 ni->ni_ncpts = LNET_CPT_NUMBER;
 556         } else {
 557                 size_t array_size = ncpts * sizeof(ni->ni_cpts[0]);
 558                 LIBCFS_ALLOC(ni->ni_cpts, array_size);
 559                 if (ni->ni_cpts == NULL)
 560                         goto failed;
 561                 memcpy(ni->ni_cpts, cpts, array_size);
 562                 ni->ni_ncpts = ncpts;
 563         }
 564
 565         rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
 566         if (rc != 0)
 567                 goto failed;
 568
 569         return ni;
 570 failed:
 571         lnet_ni_free(ni);
 572         return NULL;
 573 }
 574
 575 /*
 576  * Parse the networks string and create the matching set of NIs on the
 577  * nilist.
 578  */
 579 int
 580 lnet_parse_networks(struct list_head *netlist, char *networks,
 581                     bool use_tcp_bonding)
 582 {
 583         struct cfs_expr_list *net_el = NULL;
 584         struct cfs_expr_list *ni_el = NULL;
 585         int             tokensize;
 586         char            *tokens;
 587         char            *str;
 588         struct lnet_net *net;
 589         struct lnet_ni  *ni = NULL;
 590         __u32           net_id;
 591         int             nnets = 0;
 592
 593         if (networks == NULL) {
 594                 CERROR("networks string is undefined\n");
 595                 return -EINVAL;
 596         }
 597
 598         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 599                 /* _WAY_ conservative */
 600                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 601                                    "long\n");
 602                 return -EINVAL;
 603         }
 604
 605         tokensize = strlen(networks) + 1;
 606
 607         LIBCFS_ALLOC(tokens, tokensize);
 608         if (tokens == NULL) {
 609                 CERROR("Can't allocate net tokens\n");
 610                 return -ENOMEM;
 611         }
 612
 613         memcpy(tokens, networks, tokensize);
 614         str = tokens;
 615
 616         /*
 617          * Main parser loop.
 618          *
 619          * NB we don't check interface conflicts here; it's the LNDs
 620          * responsibility (if it cares at all)
 621          */
 622         do {
 623                 char *nistr;
 624                 char *elstr;
 625                 char *name;
 626                 int rc;
 627
 628                 /*
 629                  * Parse a network string into its components.
 630                  *
 631                  * <name>{"("...")"}{"["<el>"]"}
 632                  */
 633
 634                 /* Network name (mandatory) */
 635                 while (isspace(*str))
 636                         *str++ = '\0';
 637                 if (!*str)
 638                         break;
 639                 name = str;
 640                 str += strcspn(str, SPACESTR ":()[],");
 641                 while (isspace(*str))
 642                         *str++ = '\0';
 643
 644                 /* Interface list (optional) */
 645                 if (*str == '(') {
 646                         *str++ = '\0';
 647                         nistr = str;
 648                         str += strcspn(str, ")");
 649                         if (*str != ')') {
 650                                 str = nistr;
 651                                 goto failed_syntax;
 652                         }
 653                         do {
 654                                 *str++ = '\0';
 655                         } while (isspace(*str));
 656                 } else {
 657                         nistr = NULL;
 658                 }
 659
 660                 /* CPT expression (optional) */
 661                 if (*str == '[') {
 662                         elstr = str;
 663                         str += strcspn(str, "]");
 664                         if (*str != ']') {
 665                                 str = elstr;
 666                                 goto failed_syntax;
 667                         }
 668                         rc = cfs_expr_list_parse(elstr, str - elstr + 1,
 669                                                 0, LNET_CPT_NUMBER - 1,
 670                                                 &net_el);
 671                         if (rc != 0) {
 672                                 str = elstr;
 673                                 goto failed_syntax;
 674                         }
 675                         *elstr = '\0';
 676                         do {
 677                                 *str++ = '\0';
 678                         } while (isspace(*str));
 679                 }
 680
 681                 /* Bad delimiters */
 682                 if (*str && (strchr(DELIMITERS, *str) != NULL))
 683                         goto failed_syntax;
 684
 685                 /* go to the next net if it exits */
 686                 str += strcspn(str, ",");
 687                 if (*str == ',')
 688                         *str++ = '\0';
 689
 690                 /*
 691                  * At this point the name is properly terminated.
 692                  */
 693                 net_id = libcfs_str2net(name);
 694                 if (net_id == LNET_NIDNET(LNET_NID_ANY)) {
 695                         LCONSOLE_ERROR_MSG(0x113,
 696                                         "Unrecognised network type\n");
 697                         str = name;
 698                         goto failed_syntax;
 699                 }
 700
 701                 if (LNET_NETTYP(net_id) == LOLND) {
 702                         /* Loopback is implicit, and there can be only one. */
 703                         if (net_el) {
 704                                 cfs_expr_list_free(net_el);
 705                                 net_el = NULL;
 706                         }
 707                         /* Should we error out instead? */
 708                         continue;
 709                 }
 710
 711                 /*
 712                  * All network paramaters are now known.
 713                  */
 714                 nnets++;
 715
 716                 /* always allocate a net, since we will eventually add an
 717                  * interface to it, or we will fail, in which case we'll
 718                  * just delete it */
 719                 net = lnet_net_alloc(net_id, netlist);
 720                 if (IS_ERR_OR_NULL(net))
 721                         goto failed;
 722
 723                 if (!nistr ||
 724                     (use_tcp_bonding && LNET_NETTYP(net_id) == SOCKLND)) {
 725                         /*
 726                          * No interface list was specified, allocate a
 727                          * ni using the defaults.
 728                          */
 729                         ni = lnet_ni_alloc(net, net_el, NULL);
 730                         if (IS_ERR_OR_NULL(ni))
 731                                 goto failed;
 732
 733                         if (!nistr) {
 734                                 if (net_el) {
 735                                         cfs_expr_list_free(net_el);
 736                                         net_el = NULL;
 737                                 }
 738                                 continue;
 739                         }
 740                 }
 741
 742                 do {
 743                         elstr = NULL;
 744
 745                         /* Interface name (mandatory) */
 746                         while (isspace(*nistr))
 747                                 *nistr++ = '\0';
 748                         name = nistr;
 749                         nistr += strcspn(nistr, SPACESTR "[],");
 750                         while (isspace(*nistr))
 751                                 *nistr++ = '\0';
 752
 753                         /* CPT expression (optional) */
 754                         if (*nistr == '[') {
 755                                 elstr = nistr;
 756                                 nistr += strcspn(nistr, "]");
 757                                 if (*nistr != ']') {
 758                                         str = elstr;
 759                                         goto failed_syntax;
 760                                 }
 761                                 rc = cfs_expr_list_parse(elstr,
 762                                                         nistr - elstr + 1,
 763                                                         0, LNET_CPT_NUMBER - 1,
 764                                                         &ni_el);
 765                                 if (rc != 0) {
 766                                         str = elstr;
 767                                         goto failed_syntax;
 768                                 }
 769                                 *elstr = '\0';
 770                                 do {
 771                                         *nistr++ = '\0';
 772                                 } while (isspace(*nistr));
 773                         } else {
 774                                 ni_el = net_el;
 775                         }
 776
 777                         /*
 778                          * End of single interface specificaton,
 779                          * advance to the start of the next one, if
 780                          * any.
 781                          */
 782                         if (*nistr == ',') {
 783                                 do {
 784                                         *nistr++ = '\0';
 785                                 } while (isspace(*nistr));
 786                                 if (!*nistr) {
 787                                         str = nistr;
 788                                         goto failed_syntax;
 789                                 }
 790                         } else if (*nistr) {
 791                                 str = nistr;
 792                                 goto failed_syntax;
 793                         }
 794
 795                         /*
 796                          * At this point the name is properly terminated.
 797                          */
 798                         if (!*name) {
 799                                 str = name;
 800                                 goto failed_syntax;
 801                         }
 802
 803                         if (use_tcp_bonding &&
 804                             LNET_NETTYP(net->net_id) == SOCKLND) {
 805                                 rc = lnet_ni_add_interface(ni, name);
 806                                 if (rc != 0)
 807                                         goto failed;
 808                         } else {
 809                                 ni = lnet_ni_alloc(net, ni_el, name);
 810                                 if (IS_ERR_OR_NULL(ni))
 811                                         goto failed;
 812                         }
 813
 814                         if (ni_el) {
 815                                 if (ni_el != net_el) {
 816                                         cfs_expr_list_free(ni_el);
 817                                         ni_el = NULL;
 818                                 }
 819                         }
 820                 } while (*nistr);
 821
 822                 if (net_el) {
 823                         cfs_expr_list_free(net_el);
 824                         net_el = NULL;
 825                 }
 826         } while (*str);
 827
 828         LIBCFS_FREE(tokens, tokensize);
 829         return nnets;
 830
 831  failed_syntax:
 832         lnet_syntax("networks", networks, (int)(str - tokens), strlen(str));
 833  failed:
 834         /* free the net list and all the nis on each net */
 835         while (!list_empty(netlist)) {
 836                 net = list_entry(netlist->next, struct lnet_net, net_list);
 837
 838                 list_del_init(&net->net_list);
 839                 lnet_net_free(net);
 840         }
 841
 842         if (ni_el && ni_el != net_el)
 843                 cfs_expr_list_free(ni_el);
 844         if (net_el)
 845                 cfs_expr_list_free(net_el);
 846
 847         LIBCFS_FREE(tokens, tokensize);
 848
 849         return -EINVAL;
 850 }
 851
 852 static struct lnet_text_buf *lnet_new_text_buf(int str_len)
 853 {
 854         struct lnet_text_buf *ltb;
 855         int nob;
 856
 857         /* NB allocate space for the terminating 0 */
 858         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 859         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 860                 /* _way_ conservative for "route net gateway..." */
 861                 CERROR("text buffer too big\n");
 862                 return NULL;
 863         }
 864
 865         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 866                 CERROR("Too many text buffers\n");
 867                 return NULL;
 868         }
 869
 870         LIBCFS_ALLOC(ltb, nob);
 871         if (ltb == NULL)
 872                 return NULL;
 873
 874         ltb->ltb_size = nob;
 875         ltb->ltb_text[0] = 0;
 876         lnet_tbnob += nob;
 877         return ltb;
 878 }
 879
 880 static void
 881 lnet_free_text_buf(struct lnet_text_buf *ltb)
 882 {
 883         lnet_tbnob -= ltb->ltb_size;
 884         LIBCFS_FREE(ltb, ltb->ltb_size);
 885 }
 886
 887 static void
 888 lnet_free_text_bufs(struct list_head *tbs)
 889 {
 890         struct lnet_text_buf  *ltb;
 891
 892         while (!list_empty(tbs)) {
 893                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 894
 895                 list_del(&ltb->ltb_list);
 896                 lnet_free_text_buf(ltb);
 897         }
 898 }
 899
 900 void
 901 lnet_print_text_bufs(struct list_head *tbs)
 902 {
 903         struct list_head *tmp;
 904         struct lnet_text_buf  *ltb;
 905
 906         list_for_each(tmp, tbs) {
 907                 ltb = list_entry(tmp, struct lnet_text_buf, ltb_list);
 908
 909                 CDEBUG(D_WARNING, "%s\n", ltb->ltb_text);
 910         }
 911
 912         CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob);
 913 }
 914
 915 static int
 916 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 917 {
 918         struct list_head  pending;
 919         char             *sep;
 920         int               nob;
 921         int               i;
 922         struct lnet_text_buf  *ltb;
 923
 924         INIT_LIST_HEAD(&pending);
 925
 926         /* Split 'str' into separate commands */
 927         for (;;) {
 928                 /* skip leading whitespace */
 929                 while (isspace(*str))
 930                         str++;
 931
 932                 /* scan for separator or comment */
 933                 for (sep = str; *sep != 0; sep++)
 934                         if (lnet_issep(*sep) || *sep == '#')
 935                                 break;
 936
 937                 nob = (int)(sep - str);
 938                 if (nob > 0) {
 939                         ltb = lnet_new_text_buf(nob);
 940                         if (ltb == NULL) {
 941                                 lnet_free_text_bufs(&pending);
 942                                 return -ENOMEM;
 943                         }
 944
 945                         for (i = 0; i < nob; i++)
 946                                 if (isspace(str[i]))
 947                                         ltb->ltb_text[i] = ' ';
 948                                 else
 949                                         ltb->ltb_text[i] = str[i];
 950
 951                         ltb->ltb_text[nob] = 0;
 952
 953                         list_add_tail(&ltb->ltb_list, &pending);
 954                 }
 955
 956                 if (*sep == '#') {
 957                         /* scan for separator */
 958                         do {
 959                                 sep++;
 960                         } while (*sep != 0 && !lnet_issep(*sep));
 961                 }
 962
 963                 if (*sep == 0)
 964                         break;
 965
 966                 str = sep + 1;
 967         }
 968
 969         list_splice(&pending, tbs->prev);
 970         return 0;
 971 }
 972
 973 static int
 974 lnet_expand1tb(struct list_head *list,
 975                char *str, char *sep1, char *sep2,
 976                char *item, int itemlen)
 977 {
 978         int              len1 = (int)(sep1 - str);
 979         int              len2 = strlen(sep2 + 1);
 980         struct lnet_text_buf *ltb;
 981
 982         LASSERT (*sep1 == '[');
 983         LASSERT (*sep2 == ']');
 984
 985         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 986         if (ltb == NULL)
 987                 return -ENOMEM;
 988
 989         memcpy(ltb->ltb_text, str, len1);
 990         memcpy(&ltb->ltb_text[len1], item, itemlen);
 991         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 992         ltb->ltb_text[len1 + itemlen + len2] = 0;
 993
 994         list_add_tail(&ltb->ltb_list, list);
 995         return 0;
 996 }
 997
 998 static int
 999 lnet_str2tbs_expand(struct list_head *tbs, char *str)
1000 {
1001         char              num[16];
1002         struct list_head  pending;
1003         char             *sep;
1004         char             *sep2;
1005         char             *parsed;
1006         char             *enditem;
1007         int               lo;
1008         int               hi;
1009         int               stride;
1010         int               i;
1011         int               nob;
1012         int               scanned;
1013
1014         INIT_LIST_HEAD(&pending);
1015
1016         sep = strchr(str, '[');
1017         if (sep == NULL)                        /* nothing to expand */
1018                 return 0;
1019
1020         sep2 = strchr(sep, ']');
1021         if (sep2 == NULL)
1022                 goto failed;
1023
1024         for (parsed = sep; parsed < sep2; parsed = enditem) {
1025
1026                 enditem = ++parsed;
1027                 while (enditem < sep2 && *enditem != ',')
1028                         enditem++;
1029
1030                 if (enditem == parsed)          /* no empty items */
1031                         goto failed;
1032
1033                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
1034
1035                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
1036
1037                                 /* simple string enumeration */
1038                                 if (lnet_expand1tb(&pending, str, sep, sep2,
1039                                                    parsed, (int)(enditem - parsed)) != 0)
1040                                         goto failed;
1041
1042                                 continue;
1043                         }
1044
1045                         stride = 1;
1046                 }
1047
1048                 /* range expansion */
1049
1050                 if (enditem != parsed + scanned) /* no trailing junk */
1051                         goto failed;
1052
1053                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
1054                     (hi - lo) % stride != 0)
1055                         goto failed;
1056
1057                 for (i = lo; i <= hi; i += stride) {
1058
1059                         snprintf(num, sizeof(num), "%d", i);
1060                         nob = strlen(num);
1061                         if (nob + 1 == sizeof(num))
1062                                 goto failed;
1063
1064                         if (lnet_expand1tb(&pending, str, sep, sep2,
1065                                            num, nob) != 0)
1066                                 goto failed;
1067                 }
1068         }
1069
1070         list_splice(&pending, tbs->prev);
1071         return 1;
1072
1073  failed:
1074         lnet_free_text_bufs(&pending);
1075         return -EINVAL;
1076 }
1077
1078 static int
1079 lnet_parse_hops (char *str, unsigned int *hops)
1080 {
1081         int     len = strlen(str);
1082         int     nob = len;
1083
1084         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
1085                 nob == len &&
1086                 *hops > 0 && *hops < 256);
1087 }
1088
1089 #define LNET_PRIORITY_SEPARATOR (':')
1090
1091 static int
1092 lnet_parse_priority(char *str, unsigned int *priority, char **token)
1093 {
1094         int   nob;
1095         char *sep;
1096         int   len;
1097
1098         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
1099         if (sep == NULL) {
1100                 *priority = 0;
1101                 return 0;
1102         }
1103         len = strlen(sep + 1);
1104
1105         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
1106                 /* Update the caller's token pointer so it treats the found
1107                    priority as the token to report in the error message. */
1108                 *token += sep - str + 1;
1109                 return -EINVAL;
1110         }
1111
1112         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
1113
1114         /*
1115          * Change priority separator to \0 to be able to parse NID
1116          */
1117         *sep = '\0';
1118         return 0;
1119 }
1120
1121 static int
1122 lnet_parse_route (char *str, int *im_a_router)
1123 {
1124         /* static scratch buffer OK (single threaded) */
1125         static char       cmd[LNET_SINGLE_TEXTBUF_NOB];
1126
1127         struct list_head  nets;
1128         struct list_head  gateways;
1129         struct list_head *tmp1;
1130         struct list_head *tmp2;
1131         __u32             net;
1132         lnet_nid_t        nid;
1133         struct lnet_text_buf  *ltb;
1134         int               rc;
1135         char             *sep;
1136         char             *token = str;
1137         int               ntokens = 0;
1138         int               myrc = -1;
1139         __u32             hops;
1140         int               got_hops = 0;
1141         unsigned int      priority = 0;
1142
1143         INIT_LIST_HEAD(&gateways);
1144         INIT_LIST_HEAD(&nets);
1145
1146         /* save a copy of the string for error messages */
1147         strncpy(cmd, str, sizeof(cmd));
1148         cmd[sizeof(cmd) - 1] = '\0';
1149
1150         sep = str;
1151         for (;;) {
1152                 /* scan for token start */
1153                 while (isspace(*sep))
1154                         sep++;
1155                 if (*sep == 0) {
1156                         if (ntokens < (got_hops ? 3 : 2))
1157                                 goto token_error;
1158                         break;
1159                 }
1160
1161                 ntokens++;
1162                 token = sep++;
1163
1164                 /* scan for token end */
1165                 while (*sep != 0 && !isspace(*sep))
1166                         sep++;
1167                 if (*sep != 0)
1168                         *sep++ = 0;
1169
1170                 if (ntokens == 1) {
1171                         tmp2 = &nets;           /* expanding nets */
1172                 } else if (ntokens == 2 &&
1173                            lnet_parse_hops(token, &hops)) {
1174                         got_hops = 1;           /* got a hop count */
1175                         continue;
1176                 } else {
1177                         tmp2 = &gateways;       /* expanding gateways */
1178                 }
1179
1180                 ltb = lnet_new_text_buf(strlen(token));
1181                 if (ltb == NULL)
1182                         goto out;
1183
1184                 strcpy(ltb->ltb_text, token);
1185                 tmp1 = &ltb->ltb_list;
1186                 list_add_tail(tmp1, tmp2);
1187
1188                 while (tmp1 != tmp2) {
1189                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1190
1191                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
1192                         if (rc < 0)
1193                                 goto token_error;
1194
1195                         tmp1 = tmp1->next;
1196
1197                         if (rc > 0) {           /* expanded! */
1198                                 list_del(&ltb->ltb_list);
1199                                 lnet_free_text_buf(ltb);
1200                                 continue;
1201                         }
1202
1203                         if (ntokens == 1) {
1204                                 net = libcfs_str2net(ltb->ltb_text);
1205                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
1206                                     LNET_NETTYP(net) == LOLND)
1207                                         goto token_error;
1208                         } else {
1209                                 rc = lnet_parse_priority(ltb->ltb_text,
1210                                                          &priority, &token);
1211                                 if (rc < 0)
1212                                         goto token_error;
1213
1214                                 nid = libcfs_str2nid(ltb->ltb_text);
1215                                 if (nid == LNET_NID_ANY ||
1216                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
1217                                         goto token_error;
1218                         }
1219                 }
1220         }
1221
1222         /* if there are no hops set then we want to flag this value as
1223          * unset since hops is an optional parameter */
1224         if (!got_hops)
1225                 hops = LNET_UNDEFINED_HOPS;
1226
1227         LASSERT(!list_empty(&nets));
1228         LASSERT(!list_empty(&gateways));
1229
1230         list_for_each(tmp1, &nets) {
1231                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1232                 net = libcfs_str2net(ltb->ltb_text);
1233                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
1234
1235                 list_for_each(tmp2, &gateways) {
1236                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
1237                         nid = libcfs_str2nid(ltb->ltb_text);
1238                         LASSERT(nid != LNET_NID_ANY);
1239
1240                         if (lnet_islocalnid(nid)) {
1241                                 *im_a_router = 1;
1242                                 continue;
1243                         }
1244
1245                         rc = lnet_add_route(net, hops, nid, priority);
1246                         if (rc != 0 && rc != -EEXIST && rc != -EHOSTUNREACH) {
1247                                 CERROR("Can't create route "
1248                                        "to %s via %s\n",
1249                                        libcfs_net2str(net),
1250                                        libcfs_nid2str(nid));
1251                                 goto out;
1252                         }
1253                 }
1254         }
1255
1256         myrc = 0;
1257         goto out;
1258
1259 token_error:
1260         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
1261 out:
1262         lnet_free_text_bufs(&nets);
1263         lnet_free_text_bufs(&gateways);
1264         return myrc;
1265 }
1266
1267 static int
1268 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
1269 {
1270         struct lnet_text_buf   *ltb;
1271
1272         while (!list_empty(tbs)) {
1273                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
1274
1275                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
1276                         lnet_free_text_bufs(tbs);
1277                         return -EINVAL;
1278                 }
1279
1280                 list_del(&ltb->ltb_list);
1281                 lnet_free_text_buf(ltb);
1282         }
1283
1284         return 0;
1285 }
1286
1287 int
1288 lnet_parse_routes (char *routes, int *im_a_router)
1289 {
1290         struct list_head tbs;
1291         int              rc = 0;
1292
1293         *im_a_router = 0;
1294
1295         INIT_LIST_HEAD(&tbs);
1296
1297         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
1298                 CERROR("Error parsing routes\n");
1299                 rc = -EINVAL;
1300         } else {
1301                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
1302         }
1303
1304         LASSERT (lnet_tbnob == 0);
1305         return rc;
1306 }
1307
1308 static int
1309 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
1310 {
1311         struct list_head list = LIST_HEAD_INIT(list);
1312         int             rc;
1313         int             i;
1314
1315         rc = cfs_ip_addr_parse(token, len, &list);
1316         if (rc != 0)
1317                 return rc;
1318
1319         for (rc = i = 0; !rc && i < nip; i++)
1320                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
1321
1322         cfs_expr_list_free_list(&list);
1323
1324         return rc;
1325 }
1326
1327 static int
1328 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
1329 {
1330         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
1331
1332         int   matched = 0;
1333         int   ntokens = 0;
1334         int   len;
1335         char *net = NULL;
1336         char *sep;
1337         char *token;
1338         int   rc;
1339
1340         LASSERT(strlen(net_entry) < sizeof(tokens));
1341
1342         /* work on a copy of the string */
1343         strcpy(tokens, net_entry);
1344         sep = tokens;
1345         for (;;) {
1346                 /* scan for token start */
1347                 while (isspace(*sep))
1348                         sep++;
1349                 if (*sep == 0)
1350                         break;
1351
1352                 token = sep++;
1353
1354                 /* scan for token end */
1355                 while (*sep != 0 && !isspace(*sep))
1356                         sep++;
1357                 if (*sep != 0)
1358                         *sep++ = 0;
1359
1360                 if (ntokens++ == 0) {
1361                         net = token;
1362                         continue;
1363                 }
1364
1365                 len = strlen(token);
1366
1367                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
1368                 if (rc < 0) {
1369                         lnet_syntax("ip2nets", net_entry,
1370                                     (int)(token - tokens), len);
1371                         return rc;
1372                 }
1373
1374                 matched |= (rc != 0);
1375         }
1376
1377         if (!matched)
1378                 return 0;
1379
1380         strcpy(net_entry, net);                 /* replace with matched net */
1381         return 1;
1382 }
1383
1384 static __u32
1385 lnet_netspec2net(char *netspec)
1386 {
1387         char   *bracket = strchr(netspec, '(');
1388         __u32   net;
1389
1390         if (bracket != NULL)
1391                 *bracket = 0;
1392
1393         net = libcfs_str2net(netspec);
1394
1395         if (bracket != NULL)
1396                 *bracket = '(';
1397
1398         return net;
1399 }
1400
1401 static int
1402 lnet_splitnets(char *source, struct list_head *nets)
1403 {
1404         int               offset = 0;
1405         int               offset2;
1406         int               len;
1407         struct lnet_text_buf  *tb;
1408         struct lnet_text_buf  *tb2;
1409         struct list_head *t;
1410         char             *sep;
1411         char             *bracket;
1412         __u32             net;
1413
1414         LASSERT(!list_empty(nets));
1415         LASSERT(nets->next == nets->prev);      /* single entry */
1416
1417         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
1418
1419         for (;;) {
1420                 sep = strchr(tb->ltb_text, ',');
1421                 bracket = strchr(tb->ltb_text, '(');
1422
1423                 if (sep != NULL &&
1424                     bracket != NULL &&
1425                     bracket < sep) {
1426                         /* netspec lists interfaces... */
1427
1428                         offset2 = offset + (int)(bracket - tb->ltb_text);
1429                         len = strlen(bracket);
1430
1431                         bracket = strchr(bracket + 1, ')');
1432
1433                         if (bracket == NULL ||
1434                             !(bracket[1] == ',' || bracket[1] == 0)) {
1435                                 lnet_syntax("ip2nets", source, offset2, len);
1436                                 return -EINVAL;
1437                         }
1438
1439                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
1440                 }
1441
1442                 if (sep != NULL)
1443                         *sep++ = 0;
1444
1445                 net = lnet_netspec2net(tb->ltb_text);
1446                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
1447                         lnet_syntax("ip2nets", source, offset,
1448                                     strlen(tb->ltb_text));
1449                         return -EINVAL;
1450                 }
1451
1452                 list_for_each(t, nets) {
1453                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1454
1455                         if (tb2 == tb)
1456                                 continue;
1457
1458                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1459                                 /* duplicate network */
1460                                 lnet_syntax("ip2nets", source, offset,
1461                                             strlen(tb->ltb_text));
1462                                 return -EINVAL;
1463                         }
1464                 }
1465
1466                 if (sep == NULL)
1467                         return 0;
1468
1469                 offset += (int)(sep - tb->ltb_text);
1470                 len = strlen(sep);
1471                 tb2 = lnet_new_text_buf(len);
1472                 if (tb2 == NULL)
1473                         return -ENOMEM;
1474
1475                 strncpy(tb2->ltb_text, sep, len);
1476                 tb2->ltb_text[len] = '\0';
1477                 list_add_tail(&tb2->ltb_list, nets);
1478
1479                 tb = tb2;
1480         }
1481 }
1482
1483 static int
1484 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1485 {
1486         static char       networks[LNET_SINGLE_TEXTBUF_NOB];
1487         static char       source[LNET_SINGLE_TEXTBUF_NOB];
1488
1489         struct list_head  raw_entries;
1490         struct list_head  matched_nets;
1491         struct list_head  current_nets;
1492         struct list_head *t;
1493         struct list_head *t2;
1494         struct lnet_text_buf  *tb;
1495         struct lnet_text_buf  *tb2;
1496         __u32             net1;
1497         __u32             net2;
1498         int               len;
1499         int               count;
1500         int               dup;
1501         int               rc;
1502
1503         INIT_LIST_HEAD(&raw_entries);
1504         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1505                 CERROR("Error parsing ip2nets\n");
1506                 LASSERT(lnet_tbnob == 0);
1507                 return -EINVAL;
1508         }
1509
1510         INIT_LIST_HEAD(&matched_nets);
1511         INIT_LIST_HEAD(&current_nets);
1512         networks[0] = 0;
1513         count = 0;
1514         len = 0;
1515         rc = 0;
1516
1517         while (!list_empty(&raw_entries)) {
1518                 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1519                                 ltb_list);
1520
1521                 strncpy(source, tb->ltb_text, sizeof(source));
1522                 source[sizeof(source) - 1] = '\0';
1523
1524                 /* replace ltb_text with the network(s) add on match */
1525                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1526                 if (rc < 0)
1527                         break;
1528
1529                 list_del(&tb->ltb_list);
1530
1531                 if (rc == 0) {                  /* no match */
1532                         lnet_free_text_buf(tb);
1533                         continue;
1534                 }
1535
1536                 /* split into separate networks */
1537                 INIT_LIST_HEAD(&current_nets);
1538                 list_add(&tb->ltb_list, &current_nets);
1539                 rc = lnet_splitnets(source, &current_nets);
1540                 if (rc < 0)
1541                         break;
1542
1543                 dup = 0;
1544                 list_for_each(t, &current_nets) {
1545                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1546                         net1 = lnet_netspec2net(tb->ltb_text);
1547                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1548
1549                         list_for_each(t2, &matched_nets) {
1550                                 tb2 = list_entry(t2, struct lnet_text_buf,
1551                                                  ltb_list);
1552                                 net2 = lnet_netspec2net(tb2->ltb_text);
1553                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1554
1555                                 if (net1 == net2) {
1556                                         dup = 1;
1557                                         break;
1558                                 }
1559                         }
1560
1561                         if (dup)
1562                                 break;
1563                 }
1564
1565                 if (dup) {
1566                         lnet_free_text_bufs(&current_nets);
1567                         continue;
1568                 }
1569
1570                 list_for_each_safe(t, t2, &current_nets) {
1571                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1572
1573                         list_del(&tb->ltb_list);
1574                         list_add_tail(&tb->ltb_list, &matched_nets);
1575
1576                         len += snprintf(networks + len, sizeof(networks) - len,
1577                                         "%s%s", (len == 0) ? "" : ",",
1578                                         tb->ltb_text);
1579
1580                         if (len >= sizeof(networks)) {
1581                                 CERROR("Too many matched networks\n");
1582                                 rc = -E2BIG;
1583                                 goto out;
1584                         }
1585                 }
1586
1587                 count++;
1588         }
1589
1590  out:
1591         lnet_free_text_bufs(&raw_entries);
1592         lnet_free_text_bufs(&matched_nets);
1593         lnet_free_text_bufs(&current_nets);
1594         LASSERT(lnet_tbnob == 0);
1595
1596         if (rc < 0)
1597                 return rc;
1598
1599         *networksp = networks;
1600         return count;
1601 }
1602
1603 static void
1604 lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip)
1605 {
1606         LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs));
1607 }
1608
1609 static int
1610 lnet_ipaddr_enumerate (__u32 **ipaddrsp)
1611 {
1612         int        up;
1613         __u32      netmask;
1614         __u32     *ipaddrs;
1615         __u32     *ipaddrs2;
1616         int        nip;
1617         char     **ifnames;
1618         int        nif = lnet_ipif_enumerate(&ifnames);
1619         int        i;
1620         int        rc;
1621
1622         if (nif <= 0)
1623                 return nif;
1624
1625         LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs));
1626         if (ipaddrs == NULL) {
1627                 CERROR("Can't allocate ipaddrs[%d]\n", nif);
1628                 lnet_ipif_free_enumeration(ifnames, nif);
1629                 return -ENOMEM;
1630         }
1631
1632         for (i = nip = 0; i < nif; i++) {
1633                 if (!strcmp(ifnames[i], "lo"))
1634                         continue;
1635
1636                 rc = lnet_ipif_query(ifnames[i], &up,
1637                                        &ipaddrs[nip], &netmask);
1638                 if (rc != 0) {
1639                         CWARN("Can't query interface %s: %d\n",
1640                               ifnames[i], rc);
1641                         continue;
1642                 }
1643
1644                 if (!up) {
1645                         CWARN("Ignoring interface %s: it's down\n",
1646                               ifnames[i]);
1647                         continue;
1648                 }
1649
1650                 nip++;
1651         }
1652
1653         lnet_ipif_free_enumeration(ifnames, nif);
1654
1655         if (nip == nif) {
1656                 *ipaddrsp = ipaddrs;
1657         } else {
1658                 if (nip > 0) {
1659                         LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2));
1660                         if (ipaddrs2 == NULL) {
1661                                 CERROR("Can't allocate ipaddrs[%d]\n", nip);
1662                                 nip = -ENOMEM;
1663                         } else {
1664                                 memcpy(ipaddrs2, ipaddrs,
1665                                         nip * sizeof(*ipaddrs));
1666                                 *ipaddrsp = ipaddrs2;
1667                                 rc = nip;
1668                         }
1669                 }
1670                 lnet_ipaddr_free_enumeration(ipaddrs, nif);
1671         }
1672         return nip;
1673 }
1674
1675 int
1676 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1677 {
1678         __u32     *ipaddrs = NULL;
1679         int        nip = lnet_ipaddr_enumerate(&ipaddrs);
1680         int        rc;
1681
1682         if (nip < 0) {
1683                 LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP "
1684                                    "interfaces for ip2nets to match\n", nip);
1685                 return nip;
1686         }
1687
1688         if (nip == 0) {
1689                 LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces "
1690                                    "for ip2nets to match\n");
1691                 return -ENOENT;
1692         }
1693
1694         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1695         lnet_ipaddr_free_enumeration(ipaddrs, nip);
1696
1697         if (rc < 0) {
1698                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1699                 return rc;
1700         }
1701
1702         if (rc == 0) {
1703                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1704                                    "any local IP interfaces\n");
1705                 return -ENOENT;
1706         }
1707
1708         return 0;
1709 }