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, 2017, 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
  35 #include <linux/ctype.h>
  36 #include <linux/inetdevice.h>
  37 #include <linux/nsproxy.h>
  38 #include <net/net_namespace.h>
  39 #include <lnet/lib-lnet.h>
  40
  41 /* tmp struct for parsing routes */
  42 struct lnet_text_buf {
  43         struct list_head        ltb_list;       /* stash on lists */
  44         int                     ltb_size;       /* allocated size */
  45         char                    ltb_text[0];    /* text buffer */
  46 };
  47
  48 static int lnet_tbnob = 0;                      /* track text buf allocation */
  49 #define LNET_MAX_TEXTBUF_NOB     (64<<10)       /* bound allocation */
  50 #define LNET_SINGLE_TEXTBUF_NOB  (4<<10)
  51
  52 #define SPACESTR " \t\v\r\n"
  53 #define DELIMITERS ":()[]"
  54
  55 static void
  56 lnet_syntax(const char *name, const char *str, int offset, int width)
  57 {
  58         static char dots[LNET_SINGLE_TEXTBUF_NOB];
  59         static char dashes[LNET_SINGLE_TEXTBUF_NOB];
  60
  61         memset(dots, '.', sizeof(dots));
  62         dots[sizeof(dots)-1] = 0;
  63         memset(dashes, '-', sizeof(dashes));
  64         dashes[sizeof(dashes)-1] = 0;
  65
  66         LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str);
  67         LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n",
  68                            (int)strlen(name), dots, offset, dots,
  69                             (width < 1) ? 0 : width - 1, dashes);
  70 }
  71
  72 static int
  73 lnet_issep (char c)
  74 {
  75         switch (c) {
  76         case '\n':
  77         case '\r':
  78         case ';':
  79                 return 1;
  80         default:
  81                 return 0;
  82         }
  83 }
  84
  85 bool
  86 lnet_net_unique(__u32 net_id, struct list_head *netlist,
  87                 struct lnet_net **net)
  88 {
  89         struct lnet_net  *net_l;
  90
  91         if (!netlist)
  92                 return true;
  93
  94         list_for_each_entry(net_l, netlist, net_list) {
  95                 if (net_l->net_id == net_id) {
  96                         if (net != NULL)
  97                                 *net = net_l;
  98                         return false;
  99                 }
 100         }
 101
 102         return true;
 103 }
 104
 105 /* check that the NI is unique within the list of NIs already added to
 106  * a network */
 107 bool
 108 lnet_ni_unique_net(struct list_head *nilist, char *iface)
 109 {
 110         struct list_head *tmp;
 111         struct lnet_ni *ni;
 112
 113         list_for_each(tmp, nilist) {
 114                 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
 115
 116                 if (ni->ni_interface != NULL &&
 117                     strncmp(ni->ni_interface, iface, strlen(iface)) == 0)
 118                         return false;
 119         }
 120
 121         return true;
 122 }
 123 static bool
 124 in_array(__u32 *array, __u32 size, __u32 value)
 125 {
 126         int i;
 127
 128         for (i = 0; i < size; i++) {
 129                 if (array[i] == value)
 130                         return false;
 131         }
 132
 133         return true;
 134 }
 135
 136 static int
 137 lnet_net_append_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
 138 {
 139         __u32 *added_cpts = NULL;
 140         int i, j = 0, rc = 0;
 141
 142         /*
 143          * no need to go futher since a subset of the NIs already exist on
 144          * all CPTs
 145          */
 146         if (net->net_ncpts == LNET_CPT_NUMBER)
 147                 return 0;
 148
 149         if (cpts == NULL) {
 150                 /* there is an NI which will exist on all CPTs */
 151                 if (net->net_cpts != NULL)
 152                         CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 153                 net->net_cpts = NULL;
 154                 net->net_ncpts = LNET_CPT_NUMBER;
 155                 return 0;
 156         }
 157
 158         if (net->net_cpts == NULL) {
 159                 CFS_ALLOC_PTR_ARRAY(net->net_cpts, ncpts);
 160                 if (net->net_cpts == NULL)
 161                         return -ENOMEM;
 162                 memcpy(net->net_cpts, cpts, ncpts * sizeof(*net->net_cpts));
 163                 net->net_ncpts = ncpts;
 164                 return 0;
 165         }
 166
 167         CFS_ALLOC_PTR_ARRAY(added_cpts, LNET_CPT_NUMBER);
 168         if (added_cpts == NULL)
 169                 return -ENOMEM;
 170
 171         for (i = 0; i < ncpts; i++) {
 172                 if (!in_array(net->net_cpts, net->net_ncpts, cpts[i])) {
 173                         added_cpts[j] = cpts[i];
 174                         j++;
 175                 }
 176         }
 177
 178         /* append the new cpts if any to the list of cpts in the net */
 179         if (j > 0) {
 180                 __u32 *array = NULL, *loc;
 181                 __u32 total_entries = j + net->net_ncpts;
 182
 183                 CFS_ALLOC_PTR_ARRAY(array, total_entries);
 184                 if (array == NULL) {
 185                         rc = -ENOMEM;
 186                         goto failed;
 187                 }
 188
 189                 memcpy(array, net->net_cpts,
 190                        net->net_ncpts * sizeof(*net->net_cpts));
 191                 loc = array + net->net_ncpts;
 192                 memcpy(loc, added_cpts, j * sizeof(*net->net_cpts));
 193
 194                 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 195                 net->net_ncpts = total_entries;
 196                 net->net_cpts = array;
 197         }
 198
 199 failed:
 200         CFS_FREE_PTR_ARRAY(added_cpts, LNET_CPT_NUMBER);
 201
 202         return rc;
 203 }
 204
 205 static void
 206 lnet_net_remove_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
 207 {
 208         struct lnet_ni *ni;
 209         int rc;
 210
 211         /*
 212          * Operation Assumption:
 213          *      This function is called after an NI has been removed from
 214          *      its parent net.
 215          *
 216          * if we're removing an NI which exists on all CPTs then
 217          * we have to check if any of the other NIs on this net also
 218          * exists on all CPTs. If none, then we need to build our Net CPT
 219          * list based on the remaining NIs.
 220          *
 221          * If the NI being removed exist on a subset of the CPTs then we
 222          * alo rebuild the Net CPT list based on the remaining NIs, which
 223          * should resutl in the expected Net CPT list.
 224          */
 225
 226         /*
 227          * sometimes this function can be called due to some failure
 228          * creating an NI, before any of the cpts are allocated, so check
 229          * for that case and don't do anything
 230          */
 231         if (ncpts == 0)
 232                 return;
 233
 234         if (ncpts == LNET_CPT_NUMBER) {
 235                 /*
 236                  * first iteration through the NI list in the net to see
 237                  * if any of the NIs exist on all the CPTs. If one is
 238                  * found then our job is done.
 239                  */
 240                 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 241                         if (ni->ni_ncpts == LNET_CPT_NUMBER)
 242                                 return;
 243                 }
 244         }
 245
 246         /*
 247          * Rebuild the Net CPT list again, thereby only including only the
 248          * CPTs which the remaining NIs are associated with.
 249          */
 250         if (net->net_cpts != NULL) {
 251                 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 252                 net->net_cpts = NULL;
 253         }
 254
 255         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 256                 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts,
 257                                           net);
 258                 if (rc != 0) {
 259                         CERROR("Out of Memory\n");
 260                         /*
 261                          * do our best to keep on going. Delete
 262                          * the net cpts and set it to NULL. This
 263                          * way we can keep on going but less
 264                          * efficiently, since memory accesses might be
 265                          * accross CPT lines.
 266                          */
 267                         if (net->net_cpts != NULL) {
 268                                 CFS_FREE_PTR_ARRAY(net->net_cpts,
 269                                                    net->net_ncpts);
 270                                 net->net_cpts = NULL;
 271                                 net->net_ncpts = LNET_CPT_NUMBER;
 272                         }
 273                         return;
 274                 }
 275         }
 276 }
 277
 278 void
 279 lnet_ni_free(struct lnet_ni *ni)
 280 {
 281         lnet_net_remove_cpts(ni->ni_cpts, ni->ni_ncpts, ni->ni_net);
 282
 283         if (ni->ni_refs != NULL)
 284                 cfs_percpt_free(ni->ni_refs);
 285
 286         if (ni->ni_tx_queues != NULL)
 287                 cfs_percpt_free(ni->ni_tx_queues);
 288
 289         if (ni->ni_cpts != NULL)
 290                 cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts);
 291
 292         if (ni->ni_interface != NULL) {
 293                 LIBCFS_FREE(ni->ni_interface,
 294                             strlen(ni->ni_interface) + 1);
 295         }
 296
 297         /* release reference to net namespace */
 298         if (ni->ni_net_ns != NULL)
 299                 put_net(ni->ni_net_ns);
 300
 301         LIBCFS_FREE(ni, sizeof(*ni));
 302 }
 303
 304 void
 305 lnet_net_free(struct lnet_net *net)
 306 {
 307         struct list_head *tmp, *tmp2;
 308         struct lnet_ni *ni;
 309
 310         LASSERT(list_empty(&net->net_ni_zombie));
 311
 312         /*
 313          * delete any nis that haven't been added yet. This could happen
 314          * if there is a failure on net startup
 315          */
 316         list_for_each_safe(tmp, tmp2, &net->net_ni_added) {
 317                 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
 318                 list_del_init(&ni->ni_netlist);
 319                 lnet_ni_free(ni);
 320         }
 321
 322         /* delete any nis which have been started. */
 323         list_for_each_safe(tmp, tmp2, &net->net_ni_list) {
 324                 ni = list_entry(tmp, struct lnet_ni, ni_netlist);
 325                 list_del_init(&ni->ni_netlist);
 326                 lnet_ni_free(ni);
 327         }
 328
 329         if (net->net_cpts != NULL)
 330                 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 331
 332         LIBCFS_FREE(net, sizeof(*net));
 333 }
 334
 335 struct lnet_net *
 336 lnet_net_alloc(__u32 net_id, struct list_head *net_list)
 337 {
 338         struct lnet_net         *net;
 339
 340         if (!lnet_net_unique(net_id, net_list, &net)) {
 341                 CDEBUG(D_NET, "Returning duplicate net %p %s\n", net,
 342                        libcfs_net2str(net->net_id));
 343                 return net;
 344         }
 345
 346         LIBCFS_ALLOC(net, sizeof(*net));
 347         if (net == NULL) {
 348                 CERROR("Out of memory creating network %s\n",
 349                        libcfs_net2str(net_id));
 350                 return NULL;
 351         }
 352
 353         INIT_LIST_HEAD(&net->net_list);
 354         INIT_LIST_HEAD(&net->net_ni_list);
 355         INIT_LIST_HEAD(&net->net_ni_added);
 356         INIT_LIST_HEAD(&net->net_ni_zombie);
 357         INIT_LIST_HEAD(&net->net_rtr_pref_nids);
 358         spin_lock_init(&net->net_lock);
 359
 360         net->net_id = net_id;
 361         net->net_last_alive = ktime_get_real_seconds();
 362
 363         net->net_sel_priority = LNET_MAX_SELECTION_PRIORITY;
 364
 365         /* initialize global paramters to undefiend */
 366         net->net_tunables.lct_peer_timeout = -1;
 367         net->net_tunables.lct_max_tx_credits = -1;
 368         net->net_tunables.lct_peer_tx_credits = -1;
 369         net->net_tunables.lct_peer_rtr_credits = -1;
 370
 371         if (net_list)
 372                 list_add_tail(&net->net_list, net_list);
 373
 374         return net;
 375 }
 376
 377 static int
 378 lnet_ni_add_interface(struct lnet_ni *ni, char *iface)
 379 {
 380         int niface = 0;
 381
 382         if (ni == NULL)
 383                 return -ENOMEM;
 384
 385         /* Allocate a separate piece of memory and copy
 386          * into it the string, so we don't have
 387          * a depencency on the tokens string.  This way we
 388          * can free the tokens at the end of the function.
 389          * The newly allocated ni_interface can be
 390          * freed when freeing the NI */
 391         if (ni->ni_interface != NULL)
 392                 niface++;
 393
 394         if (niface >= 1) {
 395                 LCONSOLE_ERROR_MSG(0x115, "Too many interfaces "
 396                                    "for net %s\n",
 397                                    libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
 398                 return -EINVAL;
 399         }
 400
 401         LIBCFS_ALLOC(ni->ni_interface,
 402                      strlen(iface) + 1);
 403
 404         if (ni->ni_interface == NULL) {
 405                 CERROR("Can't allocate net interface name\n");
 406                 return -ENOMEM;
 407         }
 408
 409         strncpy(ni->ni_interface, iface,
 410                 strlen(iface) + 1);
 411
 412         return 0;
 413 }
 414
 415 static struct lnet_ni *
 416 lnet_ni_alloc_common(struct lnet_net *net, char *iface)
 417 {
 418         struct lnet_tx_queue    *tq;
 419         struct lnet_ni          *ni;
 420         int                     i;
 421
 422         if (iface != NULL)
 423                 /* make sure that this NI is unique in the net it's
 424                  * being added to */
 425                 if (!lnet_ni_unique_net(&net->net_ni_added, iface))
 426                         return NULL;
 427
 428         LIBCFS_ALLOC(ni, sizeof(*ni));
 429         if (ni == NULL) {
 430                 CERROR("Out of memory creating network interface %s%s\n",
 431                        libcfs_net2str(net->net_id),
 432                        (iface != NULL) ? iface : "");
 433                 return NULL;
 434         }
 435
 436         spin_lock_init(&ni->ni_lock);
 437         INIT_LIST_HEAD(&ni->ni_netlist);
 438         INIT_LIST_HEAD(&ni->ni_recovery);
 439         LNetInvalidateMDHandle(&ni->ni_ping_mdh);
 440         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 441                                        sizeof(*ni->ni_refs[0]));
 442         if (ni->ni_refs == NULL)
 443                 goto failed;
 444
 445         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 446                                             sizeof(*ni->ni_tx_queues[0]));
 447         if (ni->ni_tx_queues == NULL)
 448                 goto failed;
 449
 450         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 451                 INIT_LIST_HEAD(&tq->tq_delayed);
 452
 453         ni->ni_net = net;
 454         /* LND will fill in the address part of the NID */
 455         ni->ni_nid = LNET_MKNID(net->net_id, 0);
 456
 457         /* Store net namespace in which current ni is being created */
 458         if (current->nsproxy && current->nsproxy->net_ns)
 459                 ni->ni_net_ns = get_net(current->nsproxy->net_ns);
 460         else
 461                 ni->ni_net_ns = get_net(&init_net);
 462
 463         ni->ni_state = LNET_NI_STATE_INIT;
 464         ni->ni_sel_priority = LNET_MAX_SELECTION_PRIORITY;
 465         list_add_tail(&ni->ni_netlist, &net->net_ni_added);
 466
 467         /*
 468          * if an interface name is provided then make sure to add in that
 469          * interface name in NI
 470          */
 471         if (iface)
 472                 if (lnet_ni_add_interface(ni, iface) != 0)
 473                         goto failed;
 474
 475         return ni;
 476 failed:
 477         lnet_ni_free(ni);
 478         return NULL;
 479 }
 480
 481 /* allocate and add to the provided network */
 482 struct lnet_ni *
 483 lnet_ni_alloc(struct lnet_net *net, struct cfs_expr_list *el, char *iface)
 484 {
 485         struct lnet_ni          *ni;
 486         int                     rc;
 487
 488         ni = lnet_ni_alloc_common(net, iface);
 489         if (!ni)
 490                 return NULL;
 491
 492         if (!el) {
 493                 ni->ni_cpts  = NULL;
 494                 ni->ni_ncpts = LNET_CPT_NUMBER;
 495         } else {
 496                 rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts);
 497                 if (rc <= 0) {
 498                         CERROR("Failed to set CPTs for NI %s(%s): %d\n",
 499                                libcfs_net2str(net->net_id),
 500                                (iface != NULL) ? iface : "", rc);
 501                         goto failed;
 502                 }
 503
 504                 LASSERT(rc <= LNET_CPT_NUMBER);
 505                 if (rc == LNET_CPT_NUMBER) {
 506                         CFS_FREE_PTR_ARRAY(ni->ni_cpts, rc);
 507                         ni->ni_cpts = NULL;
 508                 }
 509
 510                 ni->ni_ncpts = rc;
 511         }
 512
 513         rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
 514         if (rc != 0)
 515                 goto failed;
 516
 517         return ni;
 518 failed:
 519         lnet_ni_free(ni);
 520         return NULL;
 521 }
 522
 523 struct lnet_ni *
 524 lnet_ni_alloc_w_cpt_array(struct lnet_net *net, __u32 *cpts, __u32 ncpts,
 525                           char *iface)
 526 {
 527         struct lnet_ni          *ni;
 528         int                     rc;
 529
 530         ni = lnet_ni_alloc_common(net, iface);
 531         if (!ni)
 532                 return NULL;
 533
 534         if (ncpts == 0) {
 535                 ni->ni_cpts  = NULL;
 536                 ni->ni_ncpts = LNET_CPT_NUMBER;
 537         } else {
 538                 size_t array_size = ncpts * sizeof(ni->ni_cpts[0]);
 539
 540                 CFS_ALLOC_PTR_ARRAY(ni->ni_cpts, ncpts);
 541                 if (ni->ni_cpts == NULL)
 542                         goto failed;
 543                 memcpy(ni->ni_cpts, cpts, array_size);
 544                 ni->ni_ncpts = ncpts;
 545         }
 546
 547         rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
 548         if (rc != 0)
 549                 goto failed;
 550
 551         return ni;
 552 failed:
 553         lnet_ni_free(ni);
 554         return NULL;
 555 }
 556
 557 /*
 558  * Parse the networks string and create the matching set of NIs on the
 559  * nilist.
 560  */
 561 int
 562 lnet_parse_networks(struct list_head *netlist, const char *networks)
 563 {
 564         struct cfs_expr_list *net_el = NULL;
 565         struct cfs_expr_list *ni_el = NULL;
 566         int             tokensize;
 567         char            *tokens;
 568         char            *str;
 569         struct lnet_net *net;
 570         struct lnet_ni  *ni = NULL;
 571         __u32           net_id;
 572         int             nnets = 0;
 573
 574         if (networks == NULL) {
 575                 CERROR("networks string is undefined\n");
 576                 return -EINVAL;
 577         }
 578
 579         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 580                 /* _WAY_ conservative */
 581                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 582                                    "long\n");
 583                 return -EINVAL;
 584         }
 585
 586         tokensize = strlen(networks) + 1;
 587
 588         LIBCFS_ALLOC(tokens, tokensize);
 589         if (tokens == NULL) {
 590                 CERROR("Can't allocate net tokens\n");
 591                 return -ENOMEM;
 592         }
 593
 594         memcpy(tokens, networks, tokensize);
 595         str = tokens;
 596
 597         /*
 598          * Main parser loop.
 599          *
 600          * NB we don't check interface conflicts here; it's the LNDs
 601          * responsibility (if it cares at all)
 602          */
 603         do {
 604                 char *nistr;
 605                 char *elstr;
 606                 char *name;
 607                 int rc;
 608
 609                 /*
 610                  * Parse a network string into its components.
 611                  *
 612                  * <name>{"("...")"}{"["<el>"]"}
 613                  */
 614
 615                 /* Network name (mandatory) */
 616                 while (isspace(*str))
 617                         *str++ = '\0';
 618                 if (!*str)
 619                         break;
 620                 name = str;
 621                 str += strcspn(str, SPACESTR ":()[],");
 622                 while (isspace(*str))
 623                         *str++ = '\0';
 624
 625                 /* Interface list (optional) */
 626                 if (*str == '(') {
 627                         *str++ = '\0';
 628                         nistr = str;
 629                         str += strcspn(str, ")");
 630                         if (*str != ')') {
 631                                 str = nistr;
 632                                 goto failed_syntax;
 633                         }
 634                         do {
 635                                 *str++ = '\0';
 636                         } while (isspace(*str));
 637                 } else {
 638                         nistr = NULL;
 639                 }
 640
 641                 /* CPT expression (optional) */
 642                 if (*str == '[') {
 643                         elstr = str;
 644                         str += strcspn(str, "]");
 645                         if (*str != ']') {
 646                                 str = elstr;
 647                                 goto failed_syntax;
 648                         }
 649                         rc = cfs_expr_list_parse(elstr, str - elstr + 1,
 650                                                 0, LNET_CPT_NUMBER - 1,
 651                                                 &net_el);
 652                         if (rc != 0) {
 653                                 str = elstr;
 654                                 goto failed_syntax;
 655                         }
 656                         *elstr = '\0';
 657                         do {
 658                                 *str++ = '\0';
 659                         } while (isspace(*str));
 660                 }
 661
 662                 /* Bad delimiters */
 663                 if (*str && (strchr(DELIMITERS, *str) != NULL))
 664                         goto failed_syntax;
 665
 666                 /* go to the next net if it exits */
 667                 str += strcspn(str, ",");
 668                 if (*str == ',')
 669                         *str++ = '\0';
 670
 671                 /*
 672                  * At this point the name is properly terminated.
 673                  */
 674                 net_id = libcfs_str2net(name);
 675                 if (net_id == LNET_NET_ANY) {
 676                         LCONSOLE_ERROR_MSG(0x113,
 677                                         "Unrecognised network type\n");
 678                         str = name;
 679                         goto failed_syntax;
 680                 }
 681
 682                 if (LNET_NETTYP(net_id) == LOLND) {
 683                         /* Loopback is implicit, and there can be only one. */
 684                         if (net_el) {
 685                                 cfs_expr_list_free(net_el);
 686                                 net_el = NULL;
 687                         }
 688                         /* Should we error out instead? */
 689                         continue;
 690                 }
 691
 692                 /*
 693                  * All network paramaters are now known.
 694                  */
 695                 nnets++;
 696
 697                 /* always allocate a net, since we will eventually add an
 698                  * interface to it, or we will fail, in which case we'll
 699                  * just delete it */
 700                 net = lnet_net_alloc(net_id, netlist);
 701                 if (IS_ERR_OR_NULL(net))
 702                         goto failed;
 703
 704                 if (!nistr) {
 705                         /*
 706                          * No interface list was specified, allocate a
 707                          * ni using the defaults.
 708                          */
 709                         ni = lnet_ni_alloc(net, net_el, NULL);
 710                         if (IS_ERR_OR_NULL(ni))
 711                                 goto failed;
 712
 713                         if (!nistr) {
 714                                 if (net_el) {
 715                                         cfs_expr_list_free(net_el);
 716                                         net_el = NULL;
 717                                 }
 718                                 continue;
 719                         }
 720                 }
 721
 722                 do {
 723                         elstr = NULL;
 724
 725                         /* Interface name (mandatory) */
 726                         while (isspace(*nistr))
 727                                 *nistr++ = '\0';
 728                         name = nistr;
 729                         nistr += strcspn(nistr, SPACESTR "[],");
 730                         while (isspace(*nistr))
 731                                 *nistr++ = '\0';
 732
 733                         /* CPT expression (optional) */
 734                         if (*nistr == '[') {
 735                                 elstr = nistr;
 736                                 nistr += strcspn(nistr, "]");
 737                                 if (*nistr != ']') {
 738                                         str = elstr;
 739                                         goto failed_syntax;
 740                                 }
 741                                 rc = cfs_expr_list_parse(elstr,
 742                                                         nistr - elstr + 1,
 743                                                         0, LNET_CPT_NUMBER - 1,
 744                                                         &ni_el);
 745                                 if (rc != 0) {
 746                                         str = elstr;
 747                                         goto failed_syntax;
 748                                 }
 749                                 *elstr = '\0';
 750                                 do {
 751                                         *nistr++ = '\0';
 752                                 } while (isspace(*nistr));
 753                         } else {
 754                                 ni_el = net_el;
 755                         }
 756
 757                         /*
 758                          * End of single interface specificaton,
 759                          * advance to the start of the next one, if
 760                          * any.
 761                          */
 762                         if (*nistr == ',') {
 763                                 do {
 764                                         *nistr++ = '\0';
 765                                 } while (isspace(*nistr));
 766                                 if (!*nistr) {
 767                                         str = nistr;
 768                                         goto failed_syntax;
 769                                 }
 770                         } else if (*nistr) {
 771                                 str = nistr;
 772                                 goto failed_syntax;
 773                         }
 774
 775                         /*
 776                          * At this point the name is properly terminated.
 777                          */
 778                         if (!*name) {
 779                                 str = name;
 780                                 goto failed_syntax;
 781                         }
 782
 783                         ni = lnet_ni_alloc(net, ni_el, name);
 784                         if (IS_ERR_OR_NULL(ni))
 785                                 goto failed;
 786
 787                         if (ni_el) {
 788                                 if (ni_el != net_el) {
 789                                         cfs_expr_list_free(ni_el);
 790                                         ni_el = NULL;
 791                                 }
 792                         }
 793                 } while (*nistr);
 794
 795                 if (net_el) {
 796                         cfs_expr_list_free(net_el);
 797                         net_el = NULL;
 798                 }
 799         } while (*str);
 800
 801         LIBCFS_FREE(tokens, tokensize);
 802         return nnets;
 803
 804  failed_syntax:
 805         lnet_syntax("networks", networks, (int)(str - tokens), strlen(str));
 806  failed:
 807         /* free the net list and all the nis on each net */
 808         while (!list_empty(netlist)) {
 809                 net = list_entry(netlist->next, struct lnet_net, net_list);
 810
 811                 list_del_init(&net->net_list);
 812                 lnet_net_free(net);
 813         }
 814
 815         if (ni_el && ni_el != net_el)
 816                 cfs_expr_list_free(ni_el);
 817         if (net_el)
 818                 cfs_expr_list_free(net_el);
 819
 820         LIBCFS_FREE(tokens, tokensize);
 821
 822         return -EINVAL;
 823 }
 824
 825 static struct lnet_text_buf *lnet_new_text_buf(int str_len)
 826 {
 827         struct lnet_text_buf *ltb;
 828         int nob;
 829
 830         /* NB allocate space for the terminating 0 */
 831         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 832         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 833                 /* _way_ conservative for "route net gateway..." */
 834                 CERROR("text buffer too big\n");
 835                 return NULL;
 836         }
 837
 838         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 839                 CERROR("Too many text buffers\n");
 840                 return NULL;
 841         }
 842
 843         LIBCFS_ALLOC(ltb, nob);
 844         if (ltb == NULL)
 845                 return NULL;
 846
 847         ltb->ltb_size = nob;
 848         ltb->ltb_text[0] = 0;
 849         lnet_tbnob += nob;
 850         return ltb;
 851 }
 852
 853 static void
 854 lnet_free_text_buf(struct lnet_text_buf *ltb)
 855 {
 856         lnet_tbnob -= ltb->ltb_size;
 857         LIBCFS_FREE(ltb, ltb->ltb_size);
 858 }
 859
 860 static void
 861 lnet_free_text_bufs(struct list_head *tbs)
 862 {
 863         struct lnet_text_buf  *ltb;
 864
 865         while (!list_empty(tbs)) {
 866                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 867
 868                 list_del(&ltb->ltb_list);
 869                 lnet_free_text_buf(ltb);
 870         }
 871 }
 872
 873 static int
 874 lnet_str2tbs_sep(struct list_head *tbs, const char *str)
 875 {
 876         LIST_HEAD(pending);
 877         const char *sep;
 878         int nob;
 879         int i;
 880         struct lnet_text_buf *ltb;
 881
 882         /* Split 'str' into separate commands */
 883         for (;;) {
 884                 /* skip leading whitespace */
 885                 while (isspace(*str))
 886                         str++;
 887
 888                 /* scan for separator or comment */
 889                 for (sep = str; *sep != 0; sep++)
 890                         if (lnet_issep(*sep) || *sep == '#')
 891                                 break;
 892
 893                 nob = (int)(sep - str);
 894                 if (nob > 0) {
 895                         ltb = lnet_new_text_buf(nob);
 896                         if (ltb == NULL) {
 897                                 lnet_free_text_bufs(&pending);
 898                                 return -ENOMEM;
 899                         }
 900
 901                         for (i = 0; i < nob; i++)
 902                                 if (isspace(str[i]))
 903                                         ltb->ltb_text[i] = ' ';
 904                                 else
 905                                         ltb->ltb_text[i] = str[i];
 906
 907                         ltb->ltb_text[nob] = 0;
 908
 909                         list_add_tail(&ltb->ltb_list, &pending);
 910                 }
 911
 912                 if (*sep == '#') {
 913                         /* scan for separator */
 914                         do {
 915                                 sep++;
 916                         } while (*sep != 0 && !lnet_issep(*sep));
 917                 }
 918
 919                 if (*sep == 0)
 920                         break;
 921
 922                 str = sep + 1;
 923         }
 924
 925         list_splice(&pending, tbs->prev);
 926         return 0;
 927 }
 928
 929 static int
 930 lnet_expand1tb(struct list_head *list,
 931                char *str, char *sep1, char *sep2,
 932                char *item, int itemlen)
 933 {
 934         int              len1 = (int)(sep1 - str);
 935         int              len2 = strlen(sep2 + 1);
 936         struct lnet_text_buf *ltb;
 937
 938         LASSERT (*sep1 == '[');
 939         LASSERT (*sep2 == ']');
 940
 941         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 942         if (ltb == NULL)
 943                 return -ENOMEM;
 944
 945         memcpy(ltb->ltb_text, str, len1);
 946         memcpy(&ltb->ltb_text[len1], item, itemlen);
 947         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 948         ltb->ltb_text[len1 + itemlen + len2] = 0;
 949
 950         list_add_tail(&ltb->ltb_list, list);
 951         return 0;
 952 }
 953
 954 static int
 955 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 956 {
 957         char              num[16];
 958         LIST_HEAD(pending);
 959         char             *sep;
 960         char             *sep2;
 961         char             *parsed;
 962         char             *enditem;
 963         int               lo;
 964         int               hi;
 965         int               stride;
 966         int               i;
 967         int               nob;
 968         int               scanned;
 969
 970         sep = strchr(str, '[');
 971         if (sep == NULL)                        /* nothing to expand */
 972                 return 0;
 973
 974         sep2 = strchr(sep, ']');
 975         if (sep2 == NULL)
 976                 goto failed;
 977
 978         for (parsed = sep; parsed < sep2; parsed = enditem) {
 979
 980                 enditem = ++parsed;
 981                 while (enditem < sep2 && *enditem != ',')
 982                         enditem++;
 983
 984                 if (enditem == parsed)          /* no empty items */
 985                         goto failed;
 986
 987                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
 988
 989                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
 990
 991                                 /* simple string enumeration */
 992                                 if (lnet_expand1tb(&pending, str, sep, sep2,
 993                                                    parsed, (int)(enditem - parsed)) != 0)
 994                                         goto failed;
 995
 996                                 continue;
 997                         }
 998
 999                         stride = 1;
1000                 }
1001
1002                 /* range expansion */
1003
1004                 if (enditem != parsed + scanned) /* no trailing junk */
1005                         goto failed;
1006
1007                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
1008                     (hi - lo) % stride != 0)
1009                         goto failed;
1010
1011                 for (i = lo; i <= hi; i += stride) {
1012
1013                         snprintf(num, sizeof(num), "%d", i);
1014                         nob = strlen(num);
1015                         if (nob + 1 == sizeof(num))
1016                                 goto failed;
1017
1018                         if (lnet_expand1tb(&pending, str, sep, sep2,
1019                                            num, nob) != 0)
1020                                 goto failed;
1021                 }
1022         }
1023
1024         list_splice(&pending, tbs->prev);
1025         return 1;
1026
1027  failed:
1028         lnet_free_text_bufs(&pending);
1029         return -EINVAL;
1030 }
1031
1032 static int
1033 lnet_parse_hops (char *str, unsigned int *hops)
1034 {
1035         int     len = strlen(str);
1036         int     nob = len;
1037
1038         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
1039                 nob == len &&
1040                 *hops > 0 && *hops < 256);
1041 }
1042
1043 #define LNET_PRIORITY_SEPARATOR (':')
1044
1045 static int
1046 lnet_parse_priority(char *str, unsigned int *priority, char **token)
1047 {
1048         int   nob;
1049         char *sep;
1050         int   len;
1051
1052         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
1053         if (sep == NULL) {
1054                 *priority = 0;
1055                 return 0;
1056         }
1057         len = strlen(sep + 1);
1058
1059         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
1060                 /* Update the caller's token pointer so it treats the found
1061                    priority as the token to report in the error message. */
1062                 *token += sep - str + 1;
1063                 return -EINVAL;
1064         }
1065
1066         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
1067
1068         /*
1069          * Change priority separator to \0 to be able to parse NID
1070          */
1071         *sep = '\0';
1072         return 0;
1073 }
1074
1075 static int
1076 lnet_parse_route(char *str, int *im_a_router)
1077 {
1078         /* static scratch buffer OK (single threaded) */
1079         static char cmd[LNET_SINGLE_TEXTBUF_NOB];
1080
1081         LIST_HEAD(nets);
1082         LIST_HEAD(gateways);
1083         struct list_head *tmp1;
1084         struct list_head *tmp2;
1085         __u32 net;
1086         lnet_nid_t nid;
1087         struct lnet_text_buf *ltb;
1088         int rc;
1089         char *sep;
1090         char *token = str;
1091         int ntokens = 0;
1092         int myrc = -1;
1093         __u32 hops;
1094         int got_hops = 0;
1095         unsigned int priority = 0;
1096
1097         /* save a copy of the string for error messages */
1098         strncpy(cmd, str, sizeof(cmd));
1099         cmd[sizeof(cmd) - 1] = '\0';
1100
1101         sep = str;
1102         for (;;) {
1103                 /* scan for token start */
1104                 while (isspace(*sep))
1105                         sep++;
1106                 if (*sep == 0) {
1107                         if (ntokens < (got_hops ? 3 : 2))
1108                                 goto token_error;
1109                         break;
1110                 }
1111
1112                 ntokens++;
1113                 token = sep++;
1114
1115                 /* scan for token end */
1116                 while (*sep != 0 && !isspace(*sep))
1117                         sep++;
1118                 if (*sep != 0)
1119                         *sep++ = 0;
1120
1121                 if (ntokens == 1) {
1122                         tmp2 = &nets;           /* expanding nets */
1123                 } else if (ntokens == 2 &&
1124                            lnet_parse_hops(token, &hops)) {
1125                         got_hops = 1;           /* got a hop count */
1126                         continue;
1127                 } else {
1128                         tmp2 = &gateways;       /* expanding gateways */
1129                 }
1130
1131                 ltb = lnet_new_text_buf(strlen(token));
1132                 if (ltb == NULL)
1133                         goto out;
1134
1135                 strcpy(ltb->ltb_text, token);
1136                 tmp1 = &ltb->ltb_list;
1137                 list_add_tail(tmp1, tmp2);
1138
1139                 while (tmp1 != tmp2) {
1140                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1141
1142                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
1143                         if (rc < 0)
1144                                 goto token_error;
1145
1146                         tmp1 = tmp1->next;
1147
1148                         if (rc > 0) {           /* expanded! */
1149                                 list_del(&ltb->ltb_list);
1150                                 lnet_free_text_buf(ltb);
1151                                 continue;
1152                         }
1153
1154                         if (ntokens == 1) {
1155                                 net = libcfs_str2net(ltb->ltb_text);
1156                                 if (net == LNET_NET_ANY ||
1157                                     LNET_NETTYP(net) == LOLND)
1158                                         goto token_error;
1159                         } else {
1160                                 rc = lnet_parse_priority(ltb->ltb_text,
1161                                                          &priority, &token);
1162                                 if (rc < 0)
1163                                         goto token_error;
1164
1165                                 nid = libcfs_str2nid(ltb->ltb_text);
1166                                 if (nid == LNET_NID_ANY || nid == LNET_NID_LO_0)
1167                                         goto token_error;
1168                         }
1169                 }
1170         }
1171
1172         /* if there are no hops set then we want to flag this value as
1173          * unset since hops is an optional parameter */
1174         if (!got_hops)
1175                 hops = LNET_UNDEFINED_HOPS;
1176
1177         LASSERT(!list_empty(&nets));
1178         LASSERT(!list_empty(&gateways));
1179
1180         list_for_each(tmp1, &nets) {
1181                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1182                 net = libcfs_str2net(ltb->ltb_text);
1183                 LASSERT(net != LNET_NET_ANY);
1184
1185                 list_for_each(tmp2, &gateways) {
1186                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
1187                         nid = libcfs_str2nid(ltb->ltb_text);
1188                         LASSERT(nid != LNET_NID_ANY);
1189
1190                         if (lnet_islocalnid(nid)) {
1191                                 *im_a_router = 1;
1192                                 continue;
1193                         }
1194
1195                         rc = lnet_add_route(net, hops, nid, priority, 1);
1196                         if (rc != 0 && rc != -EEXIST && rc != -EHOSTUNREACH) {
1197                                 CERROR("Can't create route "
1198                                        "to %s via %s\n",
1199                                        libcfs_net2str(net),
1200                                        libcfs_nid2str(nid));
1201                                 goto out;
1202                         }
1203                 }
1204         }
1205
1206         myrc = 0;
1207         goto out;
1208
1209 token_error:
1210         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
1211 out:
1212         lnet_free_text_bufs(&nets);
1213         lnet_free_text_bufs(&gateways);
1214         return myrc;
1215 }
1216
1217 static int
1218 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
1219 {
1220         struct lnet_text_buf   *ltb;
1221
1222         while (!list_empty(tbs)) {
1223                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
1224
1225                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
1226                         lnet_free_text_bufs(tbs);
1227                         return -EINVAL;
1228                 }
1229
1230                 list_del(&ltb->ltb_list);
1231                 lnet_free_text_buf(ltb);
1232         }
1233
1234         return 0;
1235 }
1236
1237 int
1238 lnet_parse_routes(const char *routes, int *im_a_router)
1239 {
1240         LIST_HEAD(tbs);
1241         int rc = 0;
1242
1243         *im_a_router = 0;
1244
1245         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
1246                 CERROR("Error parsing routes\n");
1247                 rc = -EINVAL;
1248         } else {
1249                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
1250         }
1251
1252         LASSERT (lnet_tbnob == 0);
1253         return rc;
1254 }
1255
1256 static int
1257 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
1258 {
1259         LIST_HEAD(list);
1260         int             rc;
1261         int             i;
1262
1263         rc = cfs_ip_addr_parse(token, len, &list);
1264         if (rc != 0)
1265                 return rc;
1266
1267         for (rc = i = 0; !rc && i < nip; i++)
1268                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
1269
1270         cfs_expr_list_free_list(&list);
1271
1272         return rc;
1273 }
1274
1275 static int
1276 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
1277 {
1278         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
1279
1280         int   matched = 0;
1281         int   ntokens = 0;
1282         int   len;
1283         char *net = NULL;
1284         char *sep;
1285         char *token;
1286         int   rc;
1287
1288         LASSERT(strlen(net_entry) < sizeof(tokens));
1289
1290         /* work on a copy of the string */
1291         strcpy(tokens, net_entry);
1292         sep = tokens;
1293         for (;;) {
1294                 /* scan for token start */
1295                 while (isspace(*sep))
1296                         sep++;
1297                 if (*sep == 0)
1298                         break;
1299
1300                 token = sep++;
1301
1302                 /* scan for token end */
1303                 while (*sep != 0 && !isspace(*sep))
1304                         sep++;
1305                 if (*sep != 0)
1306                         *sep++ = 0;
1307
1308                 if (ntokens++ == 0) {
1309                         net = token;
1310                         continue;
1311                 }
1312
1313                 len = strlen(token);
1314
1315                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
1316                 if (rc < 0) {
1317                         lnet_syntax("ip2nets", net_entry,
1318                                     (int)(token - tokens), len);
1319                         return rc;
1320                 }
1321
1322                 matched |= (rc != 0);
1323         }
1324
1325         if (!matched)
1326                 return 0;
1327
1328         strcpy(net_entry, net);                 /* replace with matched net */
1329         return 1;
1330 }
1331
1332 static __u32
1333 lnet_netspec2net(char *netspec)
1334 {
1335         char   *bracket = strchr(netspec, '(');
1336         __u32   net;
1337
1338         if (bracket != NULL)
1339                 *bracket = 0;
1340
1341         net = libcfs_str2net(netspec);
1342
1343         if (bracket != NULL)
1344                 *bracket = '(';
1345
1346         return net;
1347 }
1348
1349 static int
1350 lnet_splitnets(char *source, struct list_head *nets)
1351 {
1352         int               offset = 0;
1353         int               offset2;
1354         int               len;
1355         struct lnet_text_buf  *tb;
1356         struct lnet_text_buf  *tb2;
1357         struct list_head *t;
1358         char             *sep;
1359         char             *bracket;
1360         __u32             net;
1361
1362         LASSERT(!list_empty(nets));
1363         LASSERT(nets->next == nets->prev);      /* single entry */
1364
1365         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
1366
1367         for (;;) {
1368                 sep = strchr(tb->ltb_text, ',');
1369                 bracket = strchr(tb->ltb_text, '(');
1370
1371                 if (sep != NULL &&
1372                     bracket != NULL &&
1373                     bracket < sep) {
1374                         /* netspec lists interfaces... */
1375
1376                         offset2 = offset + (int)(bracket - tb->ltb_text);
1377                         len = strlen(bracket);
1378
1379                         bracket = strchr(bracket + 1, ')');
1380
1381                         if (bracket == NULL ||
1382                             !(bracket[1] == ',' || bracket[1] == 0)) {
1383                                 lnet_syntax("ip2nets", source, offset2, len);
1384                                 return -EINVAL;
1385                         }
1386
1387                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
1388                 }
1389
1390                 if (sep != NULL)
1391                         *sep++ = 0;
1392
1393                 net = lnet_netspec2net(tb->ltb_text);
1394                 if (net == LNET_NET_ANY) {
1395                         lnet_syntax("ip2nets", source, offset,
1396                                     strlen(tb->ltb_text));
1397                         return -EINVAL;
1398                 }
1399
1400                 list_for_each(t, nets) {
1401                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1402
1403                         if (tb2 == tb)
1404                                 continue;
1405
1406                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1407                                 /* duplicate network */
1408                                 lnet_syntax("ip2nets", source, offset,
1409                                             strlen(tb->ltb_text));
1410                                 return -EINVAL;
1411                         }
1412                 }
1413
1414                 if (sep == NULL)
1415                         return 0;
1416
1417                 offset += (int)(sep - tb->ltb_text);
1418                 len = strlen(sep);
1419                 tb2 = lnet_new_text_buf(len);
1420                 if (tb2 == NULL)
1421                         return -ENOMEM;
1422
1423                 strncpy(tb2->ltb_text, sep, len);
1424                 tb2->ltb_text[len] = '\0';
1425                 list_add_tail(&tb2->ltb_list, nets);
1426
1427                 tb = tb2;
1428         }
1429 }
1430
1431 static int
1432 lnet_match_networks(const char **networksp, const char *ip2nets,
1433                     __u32 *ipaddrs, int nip)
1434 {
1435         static char       networks[LNET_SINGLE_TEXTBUF_NOB];
1436         static char       source[LNET_SINGLE_TEXTBUF_NOB];
1437
1438         LIST_HEAD(raw_entries);
1439         LIST_HEAD(matched_nets);
1440         LIST_HEAD(current_nets);
1441         struct list_head *t;
1442         struct list_head *t2;
1443         struct lnet_text_buf  *tb;
1444         int               len;
1445         int               count;
1446         int               rc;
1447
1448         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1449                 CERROR("Error parsing ip2nets\n");
1450                 LASSERT(lnet_tbnob == 0);
1451                 return -EINVAL;
1452         }
1453
1454         networks[0] = 0;
1455         count = 0;
1456         len = 0;
1457         rc = 0;
1458
1459         while (!list_empty(&raw_entries)) {
1460                 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1461                                 ltb_list);
1462
1463                 strncpy(source, tb->ltb_text, sizeof(source));
1464                 source[sizeof(source) - 1] = '\0';
1465
1466                 /* replace ltb_text with the network(s) add on match */
1467                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1468                 if (rc < 0)
1469                         break;
1470
1471                 list_del(&tb->ltb_list);
1472
1473                 if (rc == 0) {                  /* no match */
1474                         lnet_free_text_buf(tb);
1475                         continue;
1476                 }
1477
1478                 /* split into separate networks */
1479                 INIT_LIST_HEAD(&current_nets);
1480                 list_add(&tb->ltb_list, &current_nets);
1481                 rc = lnet_splitnets(source, &current_nets);
1482                 if (rc < 0)
1483                         break;
1484
1485                 list_for_each_safe(t, t2, &current_nets) {
1486                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1487
1488                         list_move_tail(&tb->ltb_list, &matched_nets);
1489
1490                         len += scnprintf(networks + len, sizeof(networks) - len,
1491                                          "%s%s", (len == 0) ? "" : ",",
1492                                          tb->ltb_text);
1493
1494                         if (len >= sizeof(networks)) {
1495                                 CERROR("Too many matched networks\n");
1496                                 rc = -E2BIG;
1497                                 goto out;
1498                         }
1499                 }
1500
1501                 count++;
1502         }
1503
1504  out:
1505         lnet_free_text_bufs(&raw_entries);
1506         lnet_free_text_bufs(&matched_nets);
1507         lnet_free_text_bufs(&current_nets);
1508         LASSERT(lnet_tbnob == 0);
1509
1510         if (rc < 0)
1511                 return rc;
1512
1513         *networksp = networks;
1514         return count;
1515 }
1516
1517 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns)
1518 {
1519         struct lnet_inetdev *ifaces = NULL;
1520         struct net_device *dev;
1521         int nalloc = 0;
1522         int nip = 0;
1523         DECLARE_CONST_IN_IFADDR(ifa);
1524
1525         rtnl_lock();
1526         for_each_netdev(ns, dev) {
1527                 int flags = dev_get_flags(dev);
1528                 struct in_device *in_dev;
1529                 int node_id;
1530                 int cpt;
1531
1532                 if (flags & IFF_LOOPBACK) /* skip the loopback IF */
1533                         continue;
1534
1535                 if (!(flags & IFF_UP)) {
1536                         CWARN("lnet: Ignoring interface %s: it's down\n",
1537                               dev->name);
1538                         continue;
1539                 }
1540
1541                 in_dev = __in_dev_get_rtnl(dev);
1542                 if (!in_dev) {
1543                         CWARN("lnet: Interface %s has no IPv4 status.\n",
1544                               dev->name);
1545                         continue;
1546                 }
1547
1548                 node_id = dev_to_node(&dev->dev);
1549                 cpt = cfs_cpt_of_node(lnet_cpt_table(), node_id);
1550
1551                 in_dev_for_each_ifa_rtnl(ifa, in_dev) {
1552                         if (nip >= nalloc) {
1553                                 struct lnet_inetdev *tmp;
1554
1555                                 nalloc += LNET_INTERFACES_NUM;
1556                                 tmp = krealloc(ifaces, nalloc * sizeof(*tmp),
1557                                                GFP_KERNEL);
1558                                 if (!tmp) {
1559                                         kfree(ifaces);
1560                                         ifaces = NULL;
1561                                         nip = -ENOMEM;
1562                                         goto unlock_rtnl;
1563                                 }
1564                                 ifaces = tmp;
1565                         }
1566
1567                         ifaces[nip].li_cpt = cpt;
1568                         ifaces[nip].li_flags = flags;
1569                         ifaces[nip].li_ipaddr = ntohl(ifa->ifa_local);
1570                         ifaces[nip].li_netmask = ntohl(ifa->ifa_mask);
1571                         strlcpy(ifaces[nip].li_name, ifa->ifa_label,
1572                                 sizeof(ifaces[nip].li_name));
1573                         nip++;
1574                 }
1575                 endfor_ifa(in_dev);
1576         }
1577 unlock_rtnl:
1578         rtnl_unlock();
1579
1580         if (nip == 0) {
1581                 CERROR("lnet: Can't find any usable interfaces, rc = -ENOENT\n");
1582                 nip = -ENOENT;
1583         }
1584
1585         *dev_list = ifaces;
1586         return nip;
1587 }
1588 EXPORT_SYMBOL(lnet_inet_enumerate);
1589
1590 int
1591 lnet_parse_ip2nets(const char **networksp, const char *ip2nets)
1592 {
1593         struct lnet_inetdev *ifaces = NULL;
1594         __u32     *ipaddrs = NULL;
1595         int nip;
1596         int        rc;
1597         int i;
1598
1599         if (current->nsproxy && current->nsproxy->net_ns)
1600                 nip = lnet_inet_enumerate(&ifaces, current->nsproxy->net_ns);
1601         else
1602                 nip = lnet_inet_enumerate(&ifaces, &init_net);
1603         if (nip < 0) {
1604                 if (nip != -ENOENT) {
1605                         LCONSOLE_ERROR_MSG(0x117,
1606                                            "Error %d enumerating local IP interfaces for ip2nets to match\n",
1607                                            nip);
1608                 } else {
1609                         LCONSOLE_ERROR_MSG(0x118,
1610                                            "No local IP interfaces for ip2nets to match\n");
1611                 }
1612                 return nip;
1613         }
1614
1615         CFS_ALLOC_PTR_ARRAY(ipaddrs, nip);
1616         if (!ipaddrs) {
1617                 rc = -ENOMEM;
1618                 CERROR("lnet: Can't allocate ipaddrs[%d], rc = %d\n",
1619                        nip, rc);
1620                 goto out_free_addrs;
1621         }
1622
1623         for (i = 0; i < nip; i++)
1624                 ipaddrs[i] = ifaces[i].li_ipaddr;
1625
1626         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1627         if (rc < 0) {
1628                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1629         } else if (rc == 0) {
1630                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1631                                    "any local IP interfaces\n");
1632                 rc = -ENOENT;
1633         }
1634         CFS_FREE_PTR_ARRAY(ipaddrs, nip);
1635 out_free_addrs:
1636         kfree(ifaces);
1637         return rc > 0 ? 0 : rc;
1638 }