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_interfaces[0] != NULL &&
 117                     strncmp(ni->ni_interfaces[0], iface, strlen(iface)) == 0)
 118                         return false;
 119         }
 120
 121         return true;
 122 }
 123
 124 /* check that the NI is unique to the interfaces with in the same NI.
 125  * This is only a consideration if use_tcp_bonding is set */
 126 static bool
 127 lnet_ni_unique_ni(char *iface_list[LNET_INTERFACES_NUM], char *iface)
 128 {
 129         int i;
 130         for (i = 0; i < LNET_INTERFACES_NUM; i++) {
 131                 if (iface_list[i] != NULL &&
 132                     strncmp(iface_list[i], iface, strlen(iface)) == 0)
 133                         return false;
 134         }
 135
 136         return true;
 137 }
 138
 139 static bool
 140 in_array(__u32 *array, __u32 size, __u32 value)
 141 {
 142         int i;
 143
 144         for (i = 0; i < size; i++) {
 145                 if (array[i] == value)
 146                         return false;
 147         }
 148
 149         return true;
 150 }
 151
 152 static int
 153 lnet_net_append_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
 154 {
 155         __u32 *added_cpts = NULL;
 156         int i, j = 0, rc = 0;
 157
 158         /*
 159          * no need to go futher since a subset of the NIs already exist on
 160          * all CPTs
 161          */
 162         if (net->net_ncpts == LNET_CPT_NUMBER)
 163                 return 0;
 164
 165         if (cpts == NULL) {
 166                 /* there is an NI which will exist on all CPTs */
 167                 if (net->net_cpts != NULL)
 168                         CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 169                 net->net_cpts = NULL;
 170                 net->net_ncpts = LNET_CPT_NUMBER;
 171                 return 0;
 172         }
 173
 174         if (net->net_cpts == NULL) {
 175                 CFS_ALLOC_PTR_ARRAY(net->net_cpts, ncpts);
 176                 if (net->net_cpts == NULL)
 177                         return -ENOMEM;
 178                 memcpy(net->net_cpts, cpts, ncpts * sizeof(*net->net_cpts));
 179                 net->net_ncpts = ncpts;
 180                 return 0;
 181         }
 182
 183         CFS_ALLOC_PTR_ARRAY(added_cpts, LNET_CPT_NUMBER);
 184         if (added_cpts == NULL)
 185                 return -ENOMEM;
 186
 187         for (i = 0; i < ncpts; i++) {
 188                 if (!in_array(net->net_cpts, net->net_ncpts, cpts[i])) {
 189                         added_cpts[j] = cpts[i];
 190                         j++;
 191                 }
 192         }
 193
 194         /* append the new cpts if any to the list of cpts in the net */
 195         if (j > 0) {
 196                 __u32 *array = NULL, *loc;
 197                 __u32 total_entries = j + net->net_ncpts;
 198
 199                 CFS_ALLOC_PTR_ARRAY(array, total_entries);
 200                 if (array == NULL) {
 201                         rc = -ENOMEM;
 202                         goto failed;
 203                 }
 204
 205                 memcpy(array, net->net_cpts,
 206                        net->net_ncpts * sizeof(*net->net_cpts));
 207                 loc = array + net->net_ncpts;
 208                 memcpy(loc, added_cpts, j * sizeof(*net->net_cpts));
 209
 210                 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 211                 net->net_ncpts = total_entries;
 212                 net->net_cpts = array;
 213         }
 214
 215 failed:
 216         CFS_FREE_PTR_ARRAY(added_cpts, LNET_CPT_NUMBER);
 217
 218         return rc;
 219 }
 220
 221 static void
 222 lnet_net_remove_cpts(__u32 *cpts, __u32 ncpts, struct lnet_net *net)
 223 {
 224         struct lnet_ni *ni;
 225         int rc;
 226
 227         /*
 228          * Operation Assumption:
 229          *      This function is called after an NI has been removed from
 230          *      its parent net.
 231          *
 232          * if we're removing an NI which exists on all CPTs then
 233          * we have to check if any of the other NIs on this net also
 234          * exists on all CPTs. If none, then we need to build our Net CPT
 235          * list based on the remaining NIs.
 236          *
 237          * If the NI being removed exist on a subset of the CPTs then we
 238          * alo rebuild the Net CPT list based on the remaining NIs, which
 239          * should resutl in the expected Net CPT list.
 240          */
 241
 242         /*
 243          * sometimes this function can be called due to some failure
 244          * creating an NI, before any of the cpts are allocated, so check
 245          * for that case and don't do anything
 246          */
 247         if (ncpts == 0)
 248                 return;
 249
 250         if (ncpts == LNET_CPT_NUMBER) {
 251                 /*
 252                  * first iteration through the NI list in the net to see
 253                  * if any of the NIs exist on all the CPTs. If one is
 254                  * found then our job is done.
 255                  */
 256                 list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 257                         if (ni->ni_ncpts == LNET_CPT_NUMBER)
 258                                 return;
 259                 }
 260         }
 261
 262         /*
 263          * Rebuild the Net CPT list again, thereby only including only the
 264          * CPTs which the remaining NIs are associated with.
 265          */
 266         if (net->net_cpts != NULL) {
 267                 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 268                 net->net_cpts = NULL;
 269         }
 270
 271         list_for_each_entry(ni, &net->net_ni_list, ni_netlist) {
 272                 rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts,
 273                                           net);
 274                 if (rc != 0) {
 275                         CERROR("Out of Memory\n");
 276                         /*
 277                          * do our best to keep on going. Delete
 278                          * the net cpts and set it to NULL. This
 279                          * way we can keep on going but less
 280                          * efficiently, since memory accesses might be
 281                          * accross CPT lines.
 282                          */
 283                         if (net->net_cpts != NULL) {
 284                                 CFS_FREE_PTR_ARRAY(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_INTERFACES_NUM &&
 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                 CFS_FREE_PTR_ARRAY(net->net_cpts, net->net_ncpts);
 350
 351         LIBCFS_FREE(net, sizeof(*net));
 352 }
 353
 354 struct lnet_net *
 355 lnet_net_alloc(__u32 net_id, struct list_head *net_list)
 356 {
 357         struct lnet_net         *net;
 358
 359         if (!lnet_net_unique(net_id, net_list, NULL)) {
 360                 CERROR("Duplicate net %s. Ignore\n",
 361                        libcfs_net2str(net_id));
 362                 return NULL;
 363         }
 364
 365         LIBCFS_ALLOC(net, sizeof(*net));
 366         if (net == NULL) {
 367                 CERROR("Out of memory creating network %s\n",
 368                        libcfs_net2str(net_id));
 369                 return NULL;
 370         }
 371
 372         INIT_LIST_HEAD(&net->net_list);
 373         INIT_LIST_HEAD(&net->net_ni_list);
 374         INIT_LIST_HEAD(&net->net_ni_added);
 375         INIT_LIST_HEAD(&net->net_ni_zombie);
 376         spin_lock_init(&net->net_lock);
 377
 378         net->net_id = net_id;
 379         net->net_last_alive = ktime_get_real_seconds();
 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_INTERFACES_NUM &&
 411                ni->ni_interfaces[niface] != NULL)
 412                 niface++;
 413
 414         if (niface >= LNET_INTERFACES_NUM) {
 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_netlist);
 458         INIT_LIST_HEAD(&ni->ni_recovery);
 459         LNetInvalidateMDHandle(&ni->ni_ping_mdh);
 460         ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(),
 461                                        sizeof(*ni->ni_refs[0]));
 462         if (ni->ni_refs == NULL)
 463                 goto failed;
 464
 465         ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(),
 466                                             sizeof(*ni->ni_tx_queues[0]));
 467         if (ni->ni_tx_queues == NULL)
 468                 goto failed;
 469
 470         cfs_percpt_for_each(tq, i, ni->ni_tx_queues)
 471                 INIT_LIST_HEAD(&tq->tq_delayed);
 472
 473         ni->ni_net = net;
 474         /* LND will fill in the address part of the NID */
 475         ni->ni_nid = LNET_MKNID(net->net_id, 0);
 476
 477         /* Store net namespace in which current ni is being created */
 478         if (current->nsproxy && current->nsproxy->net_ns)
 479                 ni->ni_net_ns = get_net(current->nsproxy->net_ns);
 480         else
 481                 ni->ni_net_ns = get_net(&init_net);
 482
 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                         CFS_FREE_PTR_ARRAY(ni->ni_cpts, rc);
 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
 559                 CFS_ALLOC_PTR_ARRAY(ni->ni_cpts, ncpts);
 560                 if (ni->ni_cpts == NULL)
 561                         goto failed;
 562                 memcpy(ni->ni_cpts, cpts, array_size);
 563                 ni->ni_ncpts = ncpts;
 564         }
 565
 566         rc = lnet_net_append_cpts(ni->ni_cpts, ni->ni_ncpts, net);
 567         if (rc != 0)
 568                 goto failed;
 569
 570         return ni;
 571 failed:
 572         lnet_ni_free(ni);
 573         return NULL;
 574 }
 575
 576 /*
 577  * Parse the networks string and create the matching set of NIs on the
 578  * nilist.
 579  */
 580 int
 581 lnet_parse_networks(struct list_head *netlist, char *networks,
 582                     bool use_tcp_bonding)
 583 {
 584         struct cfs_expr_list *net_el = NULL;
 585         struct cfs_expr_list *ni_el = NULL;
 586         int             tokensize;
 587         char            *tokens;
 588         char            *str;
 589         struct lnet_net *net;
 590         struct lnet_ni  *ni = NULL;
 591         __u32           net_id;
 592         int             nnets = 0;
 593
 594         if (networks == NULL) {
 595                 CERROR("networks string is undefined\n");
 596                 return -EINVAL;
 597         }
 598
 599         if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) {
 600                 /* _WAY_ conservative */
 601                 LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too "
 602                                    "long\n");
 603                 return -EINVAL;
 604         }
 605
 606         tokensize = strlen(networks) + 1;
 607
 608         LIBCFS_ALLOC(tokens, tokensize);
 609         if (tokens == NULL) {
 610                 CERROR("Can't allocate net tokens\n");
 611                 return -ENOMEM;
 612         }
 613
 614         memcpy(tokens, networks, tokensize);
 615         str = tokens;
 616
 617         /*
 618          * Main parser loop.
 619          *
 620          * NB we don't check interface conflicts here; it's the LNDs
 621          * responsibility (if it cares at all)
 622          */
 623         do {
 624                 char *nistr;
 625                 char *elstr;
 626                 char *name;
 627                 int rc;
 628
 629                 /*
 630                  * Parse a network string into its components.
 631                  *
 632                  * <name>{"("...")"}{"["<el>"]"}
 633                  */
 634
 635                 /* Network name (mandatory) */
 636                 while (isspace(*str))
 637                         *str++ = '\0';
 638                 if (!*str)
 639                         break;
 640                 name = str;
 641                 str += strcspn(str, SPACESTR ":()[],");
 642                 while (isspace(*str))
 643                         *str++ = '\0';
 644
 645                 /* Interface list (optional) */
 646                 if (*str == '(') {
 647                         *str++ = '\0';
 648                         nistr = str;
 649                         str += strcspn(str, ")");
 650                         if (*str != ')') {
 651                                 str = nistr;
 652                                 goto failed_syntax;
 653                         }
 654                         do {
 655                                 *str++ = '\0';
 656                         } while (isspace(*str));
 657                 } else {
 658                         nistr = NULL;
 659                 }
 660
 661                 /* CPT expression (optional) */
 662                 if (*str == '[') {
 663                         elstr = str;
 664                         str += strcspn(str, "]");
 665                         if (*str != ']') {
 666                                 str = elstr;
 667                                 goto failed_syntax;
 668                         }
 669                         rc = cfs_expr_list_parse(elstr, str - elstr + 1,
 670                                                 0, LNET_CPT_NUMBER - 1,
 671                                                 &net_el);
 672                         if (rc != 0) {
 673                                 str = elstr;
 674                                 goto failed_syntax;
 675                         }
 676                         *elstr = '\0';
 677                         do {
 678                                 *str++ = '\0';
 679                         } while (isspace(*str));
 680                 }
 681
 682                 /* Bad delimiters */
 683                 if (*str && (strchr(DELIMITERS, *str) != NULL))
 684                         goto failed_syntax;
 685
 686                 /* go to the next net if it exits */
 687                 str += strcspn(str, ",");
 688                 if (*str == ',')
 689                         *str++ = '\0';
 690
 691                 /*
 692                  * At this point the name is properly terminated.
 693                  */
 694                 net_id = libcfs_str2net(name);
 695                 if (net_id == LNET_NIDNET(LNET_NID_ANY)) {
 696                         LCONSOLE_ERROR_MSG(0x113,
 697                                         "Unrecognised network type\n");
 698                         str = name;
 699                         goto failed_syntax;
 700                 }
 701
 702                 if (LNET_NETTYP(net_id) == LOLND) {
 703                         /* Loopback is implicit, and there can be only one. */
 704                         if (net_el) {
 705                                 cfs_expr_list_free(net_el);
 706                                 net_el = NULL;
 707                         }
 708                         /* Should we error out instead? */
 709                         continue;
 710                 }
 711
 712                 /*
 713                  * All network paramaters are now known.
 714                  */
 715                 nnets++;
 716
 717                 /* always allocate a net, since we will eventually add an
 718                  * interface to it, or we will fail, in which case we'll
 719                  * just delete it */
 720                 net = lnet_net_alloc(net_id, netlist);
 721                 if (IS_ERR_OR_NULL(net))
 722                         goto failed;
 723
 724                 if (!nistr ||
 725                     (use_tcp_bonding && LNET_NETTYP(net_id) == SOCKLND)) {
 726                         /*
 727                          * No interface list was specified, allocate a
 728                          * ni using the defaults.
 729                          */
 730                         ni = lnet_ni_alloc(net, net_el, NULL);
 731                         if (IS_ERR_OR_NULL(ni))
 732                                 goto failed;
 733
 734                         if (!nistr) {
 735                                 if (net_el) {
 736                                         cfs_expr_list_free(net_el);
 737                                         net_el = NULL;
 738                                 }
 739                                 continue;
 740                         }
 741                 }
 742
 743                 do {
 744                         elstr = NULL;
 745
 746                         /* Interface name (mandatory) */
 747                         while (isspace(*nistr))
 748                                 *nistr++ = '\0';
 749                         name = nistr;
 750                         nistr += strcspn(nistr, SPACESTR "[],");
 751                         while (isspace(*nistr))
 752                                 *nistr++ = '\0';
 753
 754                         /* CPT expression (optional) */
 755                         if (*nistr == '[') {
 756                                 elstr = nistr;
 757                                 nistr += strcspn(nistr, "]");
 758                                 if (*nistr != ']') {
 759                                         str = elstr;
 760                                         goto failed_syntax;
 761                                 }
 762                                 rc = cfs_expr_list_parse(elstr,
 763                                                         nistr - elstr + 1,
 764                                                         0, LNET_CPT_NUMBER - 1,
 765                                                         &ni_el);
 766                                 if (rc != 0) {
 767                                         str = elstr;
 768                                         goto failed_syntax;
 769                                 }
 770                                 *elstr = '\0';
 771                                 do {
 772                                         *nistr++ = '\0';
 773                                 } while (isspace(*nistr));
 774                         } else {
 775                                 ni_el = net_el;
 776                         }
 777
 778                         /*
 779                          * End of single interface specificaton,
 780                          * advance to the start of the next one, if
 781                          * any.
 782                          */
 783                         if (*nistr == ',') {
 784                                 do {
 785                                         *nistr++ = '\0';
 786                                 } while (isspace(*nistr));
 787                                 if (!*nistr) {
 788                                         str = nistr;
 789                                         goto failed_syntax;
 790                                 }
 791                         } else if (*nistr) {
 792                                 str = nistr;
 793                                 goto failed_syntax;
 794                         }
 795
 796                         /*
 797                          * At this point the name is properly terminated.
 798                          */
 799                         if (!*name) {
 800                                 str = name;
 801                                 goto failed_syntax;
 802                         }
 803
 804                         if (use_tcp_bonding &&
 805                             LNET_NETTYP(net->net_id) == SOCKLND) {
 806                                 rc = lnet_ni_add_interface(ni, name);
 807                                 if (rc != 0)
 808                                         goto failed;
 809                         } else {
 810                                 ni = lnet_ni_alloc(net, ni_el, name);
 811                                 if (IS_ERR_OR_NULL(ni))
 812                                         goto failed;
 813                         }
 814
 815                         if (ni_el) {
 816                                 if (ni_el != net_el) {
 817                                         cfs_expr_list_free(ni_el);
 818                                         ni_el = NULL;
 819                                 }
 820                         }
 821                 } while (*nistr);
 822
 823                 if (net_el) {
 824                         cfs_expr_list_free(net_el);
 825                         net_el = NULL;
 826                 }
 827         } while (*str);
 828
 829         LIBCFS_FREE(tokens, tokensize);
 830         return nnets;
 831
 832  failed_syntax:
 833         lnet_syntax("networks", networks, (int)(str - tokens), strlen(str));
 834  failed:
 835         /* free the net list and all the nis on each net */
 836         while (!list_empty(netlist)) {
 837                 net = list_entry(netlist->next, struct lnet_net, net_list);
 838
 839                 list_del_init(&net->net_list);
 840                 lnet_net_free(net);
 841         }
 842
 843         if (ni_el && ni_el != net_el)
 844                 cfs_expr_list_free(ni_el);
 845         if (net_el)
 846                 cfs_expr_list_free(net_el);
 847
 848         LIBCFS_FREE(tokens, tokensize);
 849
 850         return -EINVAL;
 851 }
 852
 853 static struct lnet_text_buf *lnet_new_text_buf(int str_len)
 854 {
 855         struct lnet_text_buf *ltb;
 856         int nob;
 857
 858         /* NB allocate space for the terminating 0 */
 859         nob = offsetof(struct lnet_text_buf, ltb_text[str_len + 1]);
 860         if (nob > LNET_SINGLE_TEXTBUF_NOB) {
 861                 /* _way_ conservative for "route net gateway..." */
 862                 CERROR("text buffer too big\n");
 863                 return NULL;
 864         }
 865
 866         if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) {
 867                 CERROR("Too many text buffers\n");
 868                 return NULL;
 869         }
 870
 871         LIBCFS_ALLOC(ltb, nob);
 872         if (ltb == NULL)
 873                 return NULL;
 874
 875         ltb->ltb_size = nob;
 876         ltb->ltb_text[0] = 0;
 877         lnet_tbnob += nob;
 878         return ltb;
 879 }
 880
 881 static void
 882 lnet_free_text_buf(struct lnet_text_buf *ltb)
 883 {
 884         lnet_tbnob -= ltb->ltb_size;
 885         LIBCFS_FREE(ltb, ltb->ltb_size);
 886 }
 887
 888 static void
 889 lnet_free_text_bufs(struct list_head *tbs)
 890 {
 891         struct lnet_text_buf  *ltb;
 892
 893         while (!list_empty(tbs)) {
 894                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
 895
 896                 list_del(&ltb->ltb_list);
 897                 lnet_free_text_buf(ltb);
 898         }
 899 }
 900
 901 static int
 902 lnet_str2tbs_sep(struct list_head *tbs, char *str)
 903 {
 904         LIST_HEAD(pending);
 905         char *sep;
 906         int nob;
 907         int i;
 908         struct lnet_text_buf *ltb;
 909
 910         /* Split 'str' into separate commands */
 911         for (;;) {
 912                 /* skip leading whitespace */
 913                 while (isspace(*str))
 914                         str++;
 915
 916                 /* scan for separator or comment */
 917                 for (sep = str; *sep != 0; sep++)
 918                         if (lnet_issep(*sep) || *sep == '#')
 919                                 break;
 920
 921                 nob = (int)(sep - str);
 922                 if (nob > 0) {
 923                         ltb = lnet_new_text_buf(nob);
 924                         if (ltb == NULL) {
 925                                 lnet_free_text_bufs(&pending);
 926                                 return -ENOMEM;
 927                         }
 928
 929                         for (i = 0; i < nob; i++)
 930                                 if (isspace(str[i]))
 931                                         ltb->ltb_text[i] = ' ';
 932                                 else
 933                                         ltb->ltb_text[i] = str[i];
 934
 935                         ltb->ltb_text[nob] = 0;
 936
 937                         list_add_tail(&ltb->ltb_list, &pending);
 938                 }
 939
 940                 if (*sep == '#') {
 941                         /* scan for separator */
 942                         do {
 943                                 sep++;
 944                         } while (*sep != 0 && !lnet_issep(*sep));
 945                 }
 946
 947                 if (*sep == 0)
 948                         break;
 949
 950                 str = sep + 1;
 951         }
 952
 953         list_splice(&pending, tbs->prev);
 954         return 0;
 955 }
 956
 957 static int
 958 lnet_expand1tb(struct list_head *list,
 959                char *str, char *sep1, char *sep2,
 960                char *item, int itemlen)
 961 {
 962         int              len1 = (int)(sep1 - str);
 963         int              len2 = strlen(sep2 + 1);
 964         struct lnet_text_buf *ltb;
 965
 966         LASSERT (*sep1 == '[');
 967         LASSERT (*sep2 == ']');
 968
 969         ltb = lnet_new_text_buf(len1 + itemlen + len2);
 970         if (ltb == NULL)
 971                 return -ENOMEM;
 972
 973         memcpy(ltb->ltb_text, str, len1);
 974         memcpy(&ltb->ltb_text[len1], item, itemlen);
 975         memcpy(&ltb->ltb_text[len1+itemlen], sep2 + 1, len2);
 976         ltb->ltb_text[len1 + itemlen + len2] = 0;
 977
 978         list_add_tail(&ltb->ltb_list, list);
 979         return 0;
 980 }
 981
 982 static int
 983 lnet_str2tbs_expand(struct list_head *tbs, char *str)
 984 {
 985         char              num[16];
 986         LIST_HEAD(pending);
 987         char             *sep;
 988         char             *sep2;
 989         char             *parsed;
 990         char             *enditem;
 991         int               lo;
 992         int               hi;
 993         int               stride;
 994         int               i;
 995         int               nob;
 996         int               scanned;
 997
 998         sep = strchr(str, '[');
 999         if (sep == NULL)                        /* nothing to expand */
1000                 return 0;
1001
1002         sep2 = strchr(sep, ']');
1003         if (sep2 == NULL)
1004                 goto failed;
1005
1006         for (parsed = sep; parsed < sep2; parsed = enditem) {
1007
1008                 enditem = ++parsed;
1009                 while (enditem < sep2 && *enditem != ',')
1010                         enditem++;
1011
1012                 if (enditem == parsed)          /* no empty items */
1013                         goto failed;
1014
1015                 if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) {
1016
1017                         if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) {
1018
1019                                 /* simple string enumeration */
1020                                 if (lnet_expand1tb(&pending, str, sep, sep2,
1021                                                    parsed, (int)(enditem - parsed)) != 0)
1022                                         goto failed;
1023
1024                                 continue;
1025                         }
1026
1027                         stride = 1;
1028                 }
1029
1030                 /* range expansion */
1031
1032                 if (enditem != parsed + scanned) /* no trailing junk */
1033                         goto failed;
1034
1035                 if (hi < 0 || lo < 0 || stride < 0 || hi < lo ||
1036                     (hi - lo) % stride != 0)
1037                         goto failed;
1038
1039                 for (i = lo; i <= hi; i += stride) {
1040
1041                         snprintf(num, sizeof(num), "%d", i);
1042                         nob = strlen(num);
1043                         if (nob + 1 == sizeof(num))
1044                                 goto failed;
1045
1046                         if (lnet_expand1tb(&pending, str, sep, sep2,
1047                                            num, nob) != 0)
1048                                 goto failed;
1049                 }
1050         }
1051
1052         list_splice(&pending, tbs->prev);
1053         return 1;
1054
1055  failed:
1056         lnet_free_text_bufs(&pending);
1057         return -EINVAL;
1058 }
1059
1060 static int
1061 lnet_parse_hops (char *str, unsigned int *hops)
1062 {
1063         int     len = strlen(str);
1064         int     nob = len;
1065
1066         return (sscanf(str, "%u%n", hops, &nob) >= 1 &&
1067                 nob == len &&
1068                 *hops > 0 && *hops < 256);
1069 }
1070
1071 #define LNET_PRIORITY_SEPARATOR (':')
1072
1073 static int
1074 lnet_parse_priority(char *str, unsigned int *priority, char **token)
1075 {
1076         int   nob;
1077         char *sep;
1078         int   len;
1079
1080         sep = strchr(str, LNET_PRIORITY_SEPARATOR);
1081         if (sep == NULL) {
1082                 *priority = 0;
1083                 return 0;
1084         }
1085         len = strlen(sep + 1);
1086
1087         if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
1088                 /* Update the caller's token pointer so it treats the found
1089                    priority as the token to report in the error message. */
1090                 *token += sep - str + 1;
1091                 return -EINVAL;
1092         }
1093
1094         CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
1095
1096         /*
1097          * Change priority separator to \0 to be able to parse NID
1098          */
1099         *sep = '\0';
1100         return 0;
1101 }
1102
1103 static int
1104 lnet_parse_route (char *str, int *im_a_router)
1105 {
1106         /* static scratch buffer OK (single threaded) */
1107         static char cmd[LNET_SINGLE_TEXTBUF_NOB];
1108
1109         LIST_HEAD(nets);
1110         LIST_HEAD(gateways);
1111         struct list_head *tmp1;
1112         struct list_head *tmp2;
1113         __u32             net;
1114         lnet_nid_t        nid;
1115         struct lnet_text_buf  *ltb;
1116         int               rc;
1117         char             *sep;
1118         char             *token = str;
1119         int               ntokens = 0;
1120         int               myrc = -1;
1121         __u32             hops;
1122         int               got_hops = 0;
1123         unsigned int      priority = 0;
1124
1125         /* save a copy of the string for error messages */
1126         strncpy(cmd, str, sizeof(cmd));
1127         cmd[sizeof(cmd) - 1] = '\0';
1128
1129         sep = str;
1130         for (;;) {
1131                 /* scan for token start */
1132                 while (isspace(*sep))
1133                         sep++;
1134                 if (*sep == 0) {
1135                         if (ntokens < (got_hops ? 3 : 2))
1136                                 goto token_error;
1137                         break;
1138                 }
1139
1140                 ntokens++;
1141                 token = sep++;
1142
1143                 /* scan for token end */
1144                 while (*sep != 0 && !isspace(*sep))
1145                         sep++;
1146                 if (*sep != 0)
1147                         *sep++ = 0;
1148
1149                 if (ntokens == 1) {
1150                         tmp2 = &nets;           /* expanding nets */
1151                 } else if (ntokens == 2 &&
1152                            lnet_parse_hops(token, &hops)) {
1153                         got_hops = 1;           /* got a hop count */
1154                         continue;
1155                 } else {
1156                         tmp2 = &gateways;       /* expanding gateways */
1157                 }
1158
1159                 ltb = lnet_new_text_buf(strlen(token));
1160                 if (ltb == NULL)
1161                         goto out;
1162
1163                 strcpy(ltb->ltb_text, token);
1164                 tmp1 = &ltb->ltb_list;
1165                 list_add_tail(tmp1, tmp2);
1166
1167                 while (tmp1 != tmp2) {
1168                         ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1169
1170                         rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text);
1171                         if (rc < 0)
1172                                 goto token_error;
1173
1174                         tmp1 = tmp1->next;
1175
1176                         if (rc > 0) {           /* expanded! */
1177                                 list_del(&ltb->ltb_list);
1178                                 lnet_free_text_buf(ltb);
1179                                 continue;
1180                         }
1181
1182                         if (ntokens == 1) {
1183                                 net = libcfs_str2net(ltb->ltb_text);
1184                                 if (net == LNET_NIDNET(LNET_NID_ANY) ||
1185                                     LNET_NETTYP(net) == LOLND)
1186                                         goto token_error;
1187                         } else {
1188                                 rc = lnet_parse_priority(ltb->ltb_text,
1189                                                          &priority, &token);
1190                                 if (rc < 0)
1191                                         goto token_error;
1192
1193                                 nid = libcfs_str2nid(ltb->ltb_text);
1194                                 if (nid == LNET_NID_ANY ||
1195                                     LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
1196                                         goto token_error;
1197                         }
1198                 }
1199         }
1200
1201         /* if there are no hops set then we want to flag this value as
1202          * unset since hops is an optional parameter */
1203         if (!got_hops)
1204                 hops = LNET_UNDEFINED_HOPS;
1205
1206         LASSERT(!list_empty(&nets));
1207         LASSERT(!list_empty(&gateways));
1208
1209         list_for_each(tmp1, &nets) {
1210                 ltb = list_entry(tmp1, struct lnet_text_buf, ltb_list);
1211                 net = libcfs_str2net(ltb->ltb_text);
1212                 LASSERT (net != LNET_NIDNET(LNET_NID_ANY));
1213
1214                 list_for_each(tmp2, &gateways) {
1215                         ltb = list_entry(tmp2, struct lnet_text_buf, ltb_list);
1216                         nid = libcfs_str2nid(ltb->ltb_text);
1217                         LASSERT(nid != LNET_NID_ANY);
1218
1219                         if (lnet_islocalnid(nid)) {
1220                                 *im_a_router = 1;
1221                                 continue;
1222                         }
1223
1224                         rc = lnet_add_route(net, hops, nid, priority, 1);
1225                         if (rc != 0 && rc != -EEXIST && rc != -EHOSTUNREACH) {
1226                                 CERROR("Can't create route "
1227                                        "to %s via %s\n",
1228                                        libcfs_net2str(net),
1229                                        libcfs_nid2str(nid));
1230                                 goto out;
1231                         }
1232                 }
1233         }
1234
1235         myrc = 0;
1236         goto out;
1237
1238 token_error:
1239         lnet_syntax("routes", cmd, (int)(token - str), strlen(token));
1240 out:
1241         lnet_free_text_bufs(&nets);
1242         lnet_free_text_bufs(&gateways);
1243         return myrc;
1244 }
1245
1246 static int
1247 lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router)
1248 {
1249         struct lnet_text_buf   *ltb;
1250
1251         while (!list_empty(tbs)) {
1252                 ltb = list_entry(tbs->next, struct lnet_text_buf, ltb_list);
1253
1254                 if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) {
1255                         lnet_free_text_bufs(tbs);
1256                         return -EINVAL;
1257                 }
1258
1259                 list_del(&ltb->ltb_list);
1260                 lnet_free_text_buf(ltb);
1261         }
1262
1263         return 0;
1264 }
1265
1266 int
1267 lnet_parse_routes (char *routes, int *im_a_router)
1268 {
1269         LIST_HEAD(tbs);
1270         int rc = 0;
1271
1272         *im_a_router = 0;
1273
1274         if (lnet_str2tbs_sep(&tbs, routes) < 0) {
1275                 CERROR("Error parsing routes\n");
1276                 rc = -EINVAL;
1277         } else {
1278                 rc = lnet_parse_route_tbs(&tbs, im_a_router);
1279         }
1280
1281         LASSERT (lnet_tbnob == 0);
1282         return rc;
1283 }
1284
1285 static int
1286 lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip)
1287 {
1288         LIST_HEAD(list);
1289         int             rc;
1290         int             i;
1291
1292         rc = cfs_ip_addr_parse(token, len, &list);
1293         if (rc != 0)
1294                 return rc;
1295
1296         for (rc = i = 0; !rc && i < nip; i++)
1297                 rc = cfs_ip_addr_match(ipaddrs[i], &list);
1298
1299         cfs_expr_list_free_list(&list);
1300
1301         return rc;
1302 }
1303
1304 static int
1305 lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip)
1306 {
1307         static char tokens[LNET_SINGLE_TEXTBUF_NOB];
1308
1309         int   matched = 0;
1310         int   ntokens = 0;
1311         int   len;
1312         char *net = NULL;
1313         char *sep;
1314         char *token;
1315         int   rc;
1316
1317         LASSERT(strlen(net_entry) < sizeof(tokens));
1318
1319         /* work on a copy of the string */
1320         strcpy(tokens, net_entry);
1321         sep = tokens;
1322         for (;;) {
1323                 /* scan for token start */
1324                 while (isspace(*sep))
1325                         sep++;
1326                 if (*sep == 0)
1327                         break;
1328
1329                 token = sep++;
1330
1331                 /* scan for token end */
1332                 while (*sep != 0 && !isspace(*sep))
1333                         sep++;
1334                 if (*sep != 0)
1335                         *sep++ = 0;
1336
1337                 if (ntokens++ == 0) {
1338                         net = token;
1339                         continue;
1340                 }
1341
1342                 len = strlen(token);
1343
1344                 rc = lnet_match_network_token(token, len, ipaddrs, nip);
1345                 if (rc < 0) {
1346                         lnet_syntax("ip2nets", net_entry,
1347                                     (int)(token - tokens), len);
1348                         return rc;
1349                 }
1350
1351                 matched |= (rc != 0);
1352         }
1353
1354         if (!matched)
1355                 return 0;
1356
1357         strcpy(net_entry, net);                 /* replace with matched net */
1358         return 1;
1359 }
1360
1361 static __u32
1362 lnet_netspec2net(char *netspec)
1363 {
1364         char   *bracket = strchr(netspec, '(');
1365         __u32   net;
1366
1367         if (bracket != NULL)
1368                 *bracket = 0;
1369
1370         net = libcfs_str2net(netspec);
1371
1372         if (bracket != NULL)
1373                 *bracket = '(';
1374
1375         return net;
1376 }
1377
1378 static int
1379 lnet_splitnets(char *source, struct list_head *nets)
1380 {
1381         int               offset = 0;
1382         int               offset2;
1383         int               len;
1384         struct lnet_text_buf  *tb;
1385         struct lnet_text_buf  *tb2;
1386         struct list_head *t;
1387         char             *sep;
1388         char             *bracket;
1389         __u32             net;
1390
1391         LASSERT(!list_empty(nets));
1392         LASSERT(nets->next == nets->prev);      /* single entry */
1393
1394         tb = list_entry(nets->next, struct lnet_text_buf, ltb_list);
1395
1396         for (;;) {
1397                 sep = strchr(tb->ltb_text, ',');
1398                 bracket = strchr(tb->ltb_text, '(');
1399
1400                 if (sep != NULL &&
1401                     bracket != NULL &&
1402                     bracket < sep) {
1403                         /* netspec lists interfaces... */
1404
1405                         offset2 = offset + (int)(bracket - tb->ltb_text);
1406                         len = strlen(bracket);
1407
1408                         bracket = strchr(bracket + 1, ')');
1409
1410                         if (bracket == NULL ||
1411                             !(bracket[1] == ',' || bracket[1] == 0)) {
1412                                 lnet_syntax("ip2nets", source, offset2, len);
1413                                 return -EINVAL;
1414                         }
1415
1416                         sep = (bracket[1] == 0) ? NULL : bracket + 1;
1417                 }
1418
1419                 if (sep != NULL)
1420                         *sep++ = 0;
1421
1422                 net = lnet_netspec2net(tb->ltb_text);
1423                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
1424                         lnet_syntax("ip2nets", source, offset,
1425                                     strlen(tb->ltb_text));
1426                         return -EINVAL;
1427                 }
1428
1429                 list_for_each(t, nets) {
1430                         tb2 = list_entry(t, struct lnet_text_buf, ltb_list);
1431
1432                         if (tb2 == tb)
1433                                 continue;
1434
1435                         if (net == lnet_netspec2net(tb2->ltb_text)) {
1436                                 /* duplicate network */
1437                                 lnet_syntax("ip2nets", source, offset,
1438                                             strlen(tb->ltb_text));
1439                                 return -EINVAL;
1440                         }
1441                 }
1442
1443                 if (sep == NULL)
1444                         return 0;
1445
1446                 offset += (int)(sep - tb->ltb_text);
1447                 len = strlen(sep);
1448                 tb2 = lnet_new_text_buf(len);
1449                 if (tb2 == NULL)
1450                         return -ENOMEM;
1451
1452                 strncpy(tb2->ltb_text, sep, len);
1453                 tb2->ltb_text[len] = '\0';
1454                 list_add_tail(&tb2->ltb_list, nets);
1455
1456                 tb = tb2;
1457         }
1458 }
1459
1460 static int
1461 lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip)
1462 {
1463         static char       networks[LNET_SINGLE_TEXTBUF_NOB];
1464         static char       source[LNET_SINGLE_TEXTBUF_NOB];
1465
1466         LIST_HEAD(raw_entries);
1467         LIST_HEAD(matched_nets);
1468         LIST_HEAD(current_nets);
1469         struct list_head *t;
1470         struct list_head *t2;
1471         struct lnet_text_buf  *tb;
1472         struct lnet_text_buf  *tb2;
1473         __u32             net1;
1474         __u32             net2;
1475         int               len;
1476         int               count;
1477         int               dup;
1478         int               rc;
1479
1480         if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) {
1481                 CERROR("Error parsing ip2nets\n");
1482                 LASSERT(lnet_tbnob == 0);
1483                 return -EINVAL;
1484         }
1485
1486         networks[0] = 0;
1487         count = 0;
1488         len = 0;
1489         rc = 0;
1490
1491         while (!list_empty(&raw_entries)) {
1492                 tb = list_entry(raw_entries.next, struct lnet_text_buf,
1493                                 ltb_list);
1494
1495                 strncpy(source, tb->ltb_text, sizeof(source));
1496                 source[sizeof(source) - 1] = '\0';
1497
1498                 /* replace ltb_text with the network(s) add on match */
1499                 rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip);
1500                 if (rc < 0)
1501                         break;
1502
1503                 list_del(&tb->ltb_list);
1504
1505                 if (rc == 0) {                  /* no match */
1506                         lnet_free_text_buf(tb);
1507                         continue;
1508                 }
1509
1510                 /* split into separate networks */
1511                 INIT_LIST_HEAD(&current_nets);
1512                 list_add(&tb->ltb_list, &current_nets);
1513                 rc = lnet_splitnets(source, &current_nets);
1514                 if (rc < 0)
1515                         break;
1516
1517                 dup = 0;
1518                 list_for_each(t, &current_nets) {
1519                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1520                         net1 = lnet_netspec2net(tb->ltb_text);
1521                         LASSERT(net1 != LNET_NIDNET(LNET_NID_ANY));
1522
1523                         list_for_each(t2, &matched_nets) {
1524                                 tb2 = list_entry(t2, struct lnet_text_buf,
1525                                                  ltb_list);
1526                                 net2 = lnet_netspec2net(tb2->ltb_text);
1527                                 LASSERT(net2 != LNET_NIDNET(LNET_NID_ANY));
1528
1529                                 if (net1 == net2) {
1530                                         dup = 1;
1531                                         break;
1532                                 }
1533                         }
1534
1535                         if (dup)
1536                                 break;
1537                 }
1538
1539                 if (dup) {
1540                         lnet_free_text_bufs(&current_nets);
1541                         continue;
1542                 }
1543
1544                 list_for_each_safe(t, t2, &current_nets) {
1545                         tb = list_entry(t, struct lnet_text_buf, ltb_list);
1546
1547                         list_move_tail(&tb->ltb_list, &matched_nets);
1548
1549                         len += scnprintf(networks + len, sizeof(networks) - len,
1550                                          "%s%s", (len == 0) ? "" : ",",
1551                                          tb->ltb_text);
1552
1553                         if (len >= sizeof(networks)) {
1554                                 CERROR("Too many matched networks\n");
1555                                 rc = -E2BIG;
1556                                 goto out;
1557                         }
1558                 }
1559
1560                 count++;
1561         }
1562
1563  out:
1564         lnet_free_text_bufs(&raw_entries);
1565         lnet_free_text_bufs(&matched_nets);
1566         lnet_free_text_bufs(&current_nets);
1567         LASSERT(lnet_tbnob == 0);
1568
1569         if (rc < 0)
1570                 return rc;
1571
1572         *networksp = networks;
1573         return count;
1574 }
1575 /*
1576  * kernel 5.3: commit ef11db3310e272d3d8dbe8739e0770820dd20e52
1577  * added in_dev_for_each_ifa_rtnl and in_dev_for_each_ifa_rcu
1578  * and removed for_ifa and endfor_ifa.
1579  * Use the _rntl variant as the current locking is rtnl.
1580  */
1581 #ifdef in_dev_for_each_ifa_rtnl
1582 #define DECLARE_CONST_IN_IFADDR(ifa)            const struct in_ifaddr *ifa
1583 #define endfor_ifa(in_dev)
1584 #else
1585 #define DECLARE_CONST_IN_IFADDR(ifa)
1586 #define in_dev_for_each_ifa_rtnl(ifa, in_dev)   for_ifa((in_dev))
1587 #endif
1588
1589 int lnet_inet_enumerate(struct lnet_inetdev **dev_list, struct net *ns)
1590 {
1591         struct lnet_inetdev *ifaces = NULL;
1592         struct net_device *dev;
1593         int nalloc = 0;
1594         int nip = 0;
1595         DECLARE_CONST_IN_IFADDR(ifa);
1596
1597         rtnl_lock();
1598         for_each_netdev(ns, dev) {
1599                 int flags = dev_get_flags(dev);
1600                 struct in_device *in_dev;
1601                 int node_id;
1602                 int cpt;
1603
1604                 if (flags & IFF_LOOPBACK) /* skip the loopback IF */
1605                         continue;
1606
1607                 if (!(flags & IFF_UP)) {
1608                         CWARN("lnet: Ignoring interface %s: it's down\n",
1609                               dev->name);
1610                         continue;
1611                 }
1612
1613                 in_dev = __in_dev_get_rtnl(dev);
1614                 if (!in_dev) {
1615                         CWARN("lnet: Interface %s has no IPv4 status.\n",
1616                               dev->name);
1617                         continue;
1618                 }
1619
1620                 node_id = dev_to_node(&dev->dev);
1621                 cpt = cfs_cpt_of_node(lnet_cpt_table(), node_id);
1622
1623                 in_dev_for_each_ifa_rtnl(ifa, in_dev) {
1624                         if (nip >= nalloc) {
1625                                 struct lnet_inetdev *tmp;
1626
1627                                 nalloc += LNET_INTERFACES_NUM;
1628                                 tmp = krealloc(ifaces, nalloc * sizeof(*tmp),
1629                                                GFP_KERNEL);
1630                                 if (!tmp) {
1631                                         kfree(ifaces);
1632                                         ifaces = NULL;
1633                                         nip = -ENOMEM;
1634                                         goto unlock_rtnl;
1635                                 }
1636                                 ifaces = tmp;
1637                         }
1638
1639                         ifaces[nip].li_cpt = cpt;
1640                         ifaces[nip].li_flags = flags;
1641                         ifaces[nip].li_ipaddr = ntohl(ifa->ifa_local);
1642                         ifaces[nip].li_netmask = ntohl(ifa->ifa_mask);
1643                         strlcpy(ifaces[nip].li_name, ifa->ifa_label,
1644                                 sizeof(ifaces[nip].li_name));
1645                         nip++;
1646                 }
1647                 endfor_ifa(in_dev);
1648         }
1649 unlock_rtnl:
1650         rtnl_unlock();
1651
1652         if (nip == 0) {
1653                 CERROR("lnet: Can't find any usable interfaces, rc = -ENOENT\n");
1654                 nip = -ENOENT;
1655         }
1656
1657         *dev_list = ifaces;
1658         return nip;
1659 }
1660 EXPORT_SYMBOL(lnet_inet_enumerate);
1661
1662 int
1663 lnet_parse_ip2nets (char **networksp, char *ip2nets)
1664 {
1665         struct lnet_inetdev *ifaces = NULL;
1666         __u32     *ipaddrs = NULL;
1667         int nip;
1668         int        rc;
1669         int i;
1670
1671         if (current->nsproxy && current->nsproxy->net_ns)
1672                 nip = lnet_inet_enumerate(&ifaces, current->nsproxy->net_ns);
1673         else
1674                 nip = lnet_inet_enumerate(&ifaces, &init_net);
1675         if (nip < 0) {
1676                 if (nip != -ENOENT) {
1677                         LCONSOLE_ERROR_MSG(0x117,
1678                                            "Error %d enumerating local IP interfaces for ip2nets to match\n",
1679                                            nip);
1680                 } else {
1681                         LCONSOLE_ERROR_MSG(0x118,
1682                                            "No local IP interfaces for ip2nets to match\n");
1683                 }
1684                 return nip;
1685         }
1686
1687         CFS_ALLOC_PTR_ARRAY(ipaddrs, nip);
1688         if (!ipaddrs) {
1689                 rc = -ENOMEM;
1690                 CERROR("lnet: Can't allocate ipaddrs[%d], rc = %d\n",
1691                        nip, rc);
1692                 goto out_free_addrs;
1693         }
1694
1695         for (i = 0; i < nip; i++)
1696                 ipaddrs[i] = ifaces[i].li_ipaddr;
1697
1698         rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip);
1699         if (rc < 0) {
1700                 LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc);
1701         } else if (rc == 0) {
1702                 LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match "
1703                                    "any local IP interfaces\n");
1704                 rc = -ENOENT;
1705         }
1706         CFS_FREE_PTR_ARRAY(ipaddrs, nip);
1707 out_free_addrs:
1708         kfree(ifaces);
1709         return rc > 0 ? 0 : rc;
1710 }