lnet/utils/lnetconfig/liblnetconfig.c

   1 /*
   2  * LGPL 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 Lesser General Public License as
   8  * published by the Free Software Foundation; either version 2.1 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  * LGPL HEADER END
  20  *
  21  * Copyright (c) 2014, 2016, Intel Corporation.
  22  *
  23  * Author:
  24  *   Amir Shehata <amir.shehata@intel.com>
  25  */
  26
  27 /*
  28  * There are two APIs:
  29  *  1. APIs that take the actual parameters expanded.  This is for other
  30  *  entities that would like to link against the library and call the APIs
  31  *  directly without having to form an intermediate representation.
  32  *  2. APIs that take a YAML file and parses out the information there and
  33  *  calls the APIs mentioned in 1
  34  */
  35
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <byteswap.h>
  39 #include <netdb.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44 #include <sys/ioctl.h>
  45 #include <net/if.h>
  46 #include <libcfs/util/ioctl.h>
  47 #include <linux/lnet/lnetctl.h>
  48 #include "liblnd.h"
  49 #include <sys/types.h>
  50 #include <sys/stat.h>
  51 #include <fcntl.h>
  52 #include <ifaddrs.h>
  53 #include "liblnetconfig.h"
  54 #include "cyaml.h"
  55
  56 #define CONFIG_CMD              "configure"
  57 #define UNCONFIG_CMD            "unconfigure"
  58 #define ADD_CMD                 "add"
  59 #define DEL_CMD                 "del"
  60 #define SHOW_CMD                "show"
  61 #define DBG_CMD                 "dbg"
  62 #define MANAGE_CMD              "manage"
  63
  64 #define modparam_path "/sys/module/lnet/parameters/"
  65
  66 const char *gmsg_stat_names[] = {"sent_stats", "received_stats",
  67                                  "dropped_stats"};
  68
  69 /*
  70  * lustre_lnet_ip_range_descr
  71  *      Describes an IP range.
  72  *      Each octect is an expression
  73  */
  74 struct lustre_lnet_ip_range_descr {
  75         struct list_head ipr_entry;
  76         struct list_head ipr_expr;
  77 };
  78
  79 /*
  80  * lustre_lnet_ip2nets
  81  *      Describes an ip2nets rule. This can be on a list of rules.
  82  */
  83 struct lustre_lnet_ip2nets {
  84         struct lnet_dlc_network_descr ip2nets_net;
  85         struct list_head ip2nets_ip_ranges;
  86 };
  87
  88 int open_sysfs_file(const char *path, const char *attr, const int mode)
  89 {
  90         int fd;
  91         char filename[LNET_MAX_STR_LEN];
  92
  93         if (strlen(path) + strlen(attr) >= LNET_MAX_STR_LEN)
  94                 return -1;
  95
  96         snprintf(filename, sizeof(filename), "%s%s",
  97                  path, attr);
  98
  99         fd = open(filename, mode);
 100
 101         return fd;
 102 }
 103
 104 static int read_sysfs_file(const char *path, const char *attr,
 105                            void *val, const size_t size, const int nelem)
 106 {
 107         int fd;
 108         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
 109
 110         fd = open_sysfs_file(path, attr, O_RDONLY);
 111         if (fd == -1)
 112                 return LUSTRE_CFG_RC_NO_MATCH;
 113
 114         if (read(fd, val, size * nelem) == -1)
 115                 goto close_fd;
 116
 117         rc = LUSTRE_CFG_RC_NO_ERR;
 118
 119 close_fd:
 120         close(fd);
 121         return rc;
 122 }
 123
 124 static int write_sysfs_file(const char *path, const char *attr,
 125                             void *val, const size_t size, const int nelem)
 126 {
 127         int fd;
 128         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
 129
 130         fd = open_sysfs_file(path, attr, O_WRONLY | O_TRUNC);
 131         if (fd == -1)
 132                 return LUSTRE_CFG_RC_NO_MATCH;
 133
 134         if (write(fd, val, size * nelem) == -1)
 135                 goto close_fd;
 136
 137         rc = LUSTRE_CFG_RC_NO_ERR;
 138
 139 close_fd:
 140         close(fd);
 141         return rc;
 142 }
 143
 144 /*
 145  * free_intf_descr
 146  *      frees the memory allocated for an intf descriptor.
 147  */
 148 void free_intf_descr(struct lnet_dlc_intf_descr *intf_descr)
 149 {
 150         if (!intf_descr)
 151                 return;
 152
 153         if (intf_descr->cpt_expr != NULL)
 154                 cfs_expr_list_free(intf_descr->cpt_expr);
 155         free(intf_descr);
 156 }
 157
 158 /*
 159  * lustre_lnet_add_ip_range
 160  * Formatting:
 161  *      given a string of the format:
 162  *      <expr.expr.expr.expr> parse each expr into
 163  *      a lustre_lnet_ip_range_descr structure and insert on the list.
 164  *
 165  *      This function is called from
 166  *              YAML on each ip-range.
 167  *              As a result of lnetctl command
 168  *              When building a NID or P2P selection rules
 169  */
 170 int lustre_lnet_add_ip_range(struct list_head *list, char *str_ip_range)
 171 {
 172         struct lustre_lnet_ip_range_descr *ip_range;
 173         int rc;
 174
 175         ip_range = calloc(1, sizeof(*ip_range));
 176         if (ip_range == NULL)
 177                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 178
 179         INIT_LIST_HEAD(&ip_range->ipr_entry);
 180         INIT_LIST_HEAD(&ip_range->ipr_expr);
 181
 182         rc = cfs_ip_addr_parse(str_ip_range, strlen(str_ip_range),
 183                                &ip_range->ipr_expr);
 184         if (rc != 0)
 185                 return LUSTRE_CFG_RC_BAD_PARAM;
 186
 187         list_add_tail(&ip_range->ipr_entry, list);
 188
 189         return LUSTRE_CFG_RC_NO_ERR;
 190 }
 191
 192 int lustre_lnet_add_intf_descr(struct list_head *list, char *intf, int len)
 193 {
 194         char *open_sq_bracket = NULL, *close_sq_bracket = NULL,
 195              *intf_name;
 196         struct lnet_dlc_intf_descr *intf_descr = NULL;
 197         int rc;
 198         char intf_string[LNET_MAX_STR_LEN];
 199
 200         if (len >= LNET_MAX_STR_LEN)
 201                 return LUSTRE_CFG_RC_BAD_PARAM;
 202
 203         strncpy(intf_string, intf, len);
 204         intf_string[len] = '\0';
 205
 206         intf_descr = calloc(1, sizeof(*intf_descr));
 207         if (intf_descr == NULL)
 208                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 209
 210         INIT_LIST_HEAD(&intf_descr->intf_on_network);
 211
 212         intf_name = intf_string;
 213         open_sq_bracket = strchr(intf_string, '[');
 214         if (open_sq_bracket != NULL) {
 215                 close_sq_bracket = strchr(intf_string, ']');
 216                 if (close_sq_bracket == NULL) {
 217                         free(intf_descr);
 218                         return LUSTRE_CFG_RC_BAD_PARAM;
 219                 }
 220                 rc = cfs_expr_list_parse(open_sq_bracket,
 221                                          strlen(open_sq_bracket), 0, UINT_MAX,
 222                                          &intf_descr->cpt_expr);
 223                 if (rc < 0) {
 224                         free(intf_descr);
 225                         return LUSTRE_CFG_RC_BAD_PARAM;
 226                 }
 227                 strncpy(intf_descr->intf_name, intf_name,
 228                         open_sq_bracket - intf_name);
 229                 intf_descr->intf_name[open_sq_bracket - intf_name] = '\0';
 230         } else {
 231                 strcpy(intf_descr->intf_name, intf_name);
 232                 intf_descr->cpt_expr = NULL;
 233         }
 234
 235         list_add_tail(&intf_descr->intf_on_network, list);
 236
 237         return LUSTRE_CFG_RC_NO_ERR;
 238 }
 239
 240 void lustre_lnet_init_nw_descr(struct lnet_dlc_network_descr *nw_descr)
 241 {
 242         if (nw_descr != NULL) {
 243                 INIT_LIST_HEAD(&nw_descr->network_on_rule);
 244                 INIT_LIST_HEAD(&nw_descr->nw_intflist);
 245         }
 246 }
 247
 248 int lustre_lnet_parse_nids(char *nids, char **array, int size,
 249                            char ***out_array)
 250 {
 251         int num_nids = 0;
 252         char *comma = nids, *cur, *entry;
 253         char **new_array;
 254         int i, len, start = 0, finish = 0;
 255
 256         if (nids == NULL || strlen(nids) == 0)
 257                 return size;
 258
 259         /* count the number or new nids, by counting the number of commas */
 260         while (comma) {
 261                 comma = strchr(comma, ',');
 262                 if (comma) {
 263                         comma++;
 264                         num_nids++;
 265                 } else {
 266                         num_nids++;
 267                 }
 268         }
 269
 270         /*
 271          * if the array is not NULL allocate a large enough array to house
 272          * the old and new entries
 273          */
 274         new_array = calloc(sizeof(char*),
 275                            (size > 0) ? size + num_nids : num_nids);
 276
 277         if (!new_array)
 278                 goto failed;
 279
 280         /* parse our the new nids and add them to the tail of the array */
 281         comma = nids;
 282         cur = nids;
 283         start = (size > 0) ? size: 0;
 284         finish = (size > 0) ? size + num_nids : num_nids;
 285         for (i = start; i < finish; i++) {
 286                 comma = strchr(comma, ',');
 287                 if (!comma)
 288                         /*
 289                          * the length of the string to be parsed out is
 290                          * from cur to end of string. So it's good enough
 291                          * to strlen(cur)
 292                          */
 293                         len = strlen(cur) + 1;
 294                 else
 295                         /* length of the string is comma - cur */
 296                         len = (comma - cur) + 1;
 297
 298                 entry = calloc(1, len);
 299                 if (!entry) {
 300                         finish = i > 0 ? i - 1: 0;
 301                         goto failed;
 302                 }
 303                 strncpy(entry, cur, len - 1);
 304                 entry[len] = '\0';
 305                 new_array[i] = entry;
 306                 if (comma) {
 307                         comma++;
 308                         cur = comma;
 309                 }
 310         }
 311
 312         /* add the old entries in the array and delete the old array*/
 313         for (i = 0; i < size; i++)
 314                 new_array[i] = array[i];
 315
 316         if (array)
 317                 free(array);
 318
 319         *out_array = new_array;
 320
 321         return finish;
 322
 323 failed:
 324         for (i = start; i < finish; i++)
 325                 free(new_array[i]);
 326         if (new_array)
 327                 free(new_array);
 328
 329         return size;
 330 }
 331
 332 /*
 333  * format expected:
 334  *      <intf>[<expr>], <intf>[<expr>],..
 335  */
 336 int lustre_lnet_parse_interfaces(char *intf_str,
 337                                  struct lnet_dlc_network_descr *nw_descr)
 338 {
 339         char *open_square;
 340         char *close_square;
 341         char *comma;
 342         char *cur = intf_str, *next = NULL;
 343         char *end = intf_str + strlen(intf_str);
 344         int rc, len;
 345         struct lnet_dlc_intf_descr *intf_descr, *tmp;
 346
 347         if (nw_descr == NULL)
 348                 return LUSTRE_CFG_RC_BAD_PARAM;
 349
 350         while (cur < end) {
 351                 open_square = strchr(cur, '[');
 352                 if (open_square != NULL) {
 353                         close_square = strchr(cur, ']');
 354                         if (close_square == NULL) {
 355                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 356                                 goto failed;
 357                         }
 358
 359                         comma = strchr(cur, ',');
 360                         if (comma != NULL && comma > close_square) {
 361                                 next = comma + 1;
 362                                 len = next - close_square;
 363                         } else {
 364                                 len = strlen(cur);
 365                                 next = cur + len;
 366                         }
 367                 } else {
 368                         comma = strchr(cur, ',');
 369                         if (comma != NULL) {
 370                                 next = comma + 1;
 371                                 len = comma - cur;
 372                         } else {
 373                                 len = strlen(cur);
 374                                 next = cur + len;
 375                         }
 376                 }
 377
 378                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist, cur, len);
 379                 if (rc != LUSTRE_CFG_RC_NO_ERR)
 380                         goto failed;
 381
 382                 cur = next;
 383         }
 384
 385         return LUSTRE_CFG_RC_NO_ERR;
 386
 387 failed:
 388         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
 389                                  intf_on_network) {
 390                 list_del(&intf_descr->intf_on_network);
 391                 free_intf_descr(intf_descr);
 392         }
 393
 394         return rc;
 395 }
 396
 397 int lustre_lnet_config_lib_init(void)
 398 {
 399         return register_ioc_dev(LNET_DEV_ID, LNET_DEV_PATH,
 400                                 LNET_DEV_MAJOR, LNET_DEV_MINOR);
 401 }
 402
 403 void lustre_lnet_config_lib_uninit(void)
 404 {
 405         unregister_ioc_dev(LNET_DEV_ID);
 406 }
 407
 408 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
 409                                  int seq_no, struct cYAML **err_rc)
 410 {
 411         struct libcfs_ioctl_data data;
 412         unsigned int opc;
 413         int rc;
 414         char err_str[LNET_MAX_STR_LEN];
 415
 416         snprintf(err_str, sizeof(err_str), "\"Success\"");
 417
 418         LIBCFS_IOC_INIT(data);
 419
 420         /* Reverse logic is used here in order not to change
 421          * the lctl utility */
 422         data.ioc_flags = load_ni_from_mod ? 0 : 1;
 423
 424         opc = up ? IOC_LIBCFS_CONFIGURE : IOC_LIBCFS_UNCONFIGURE;
 425
 426         rc = l_ioctl(LNET_DEV_ID, opc, &data);
 427         if (rc != 0) {
 428                 snprintf(err_str,
 429                         sizeof(err_str),
 430                         "\"LNet %s error: %s\"", (up) ? "configure" :
 431                         "unconfigure", strerror(errno));
 432                 rc = -errno;
 433         }
 434
 435         cYAML_build_error(rc, seq_no, (up) ? CONFIG_CMD : UNCONFIG_CMD,
 436                           "lnet", err_str, err_rc);
 437
 438         return rc;
 439 }
 440
 441 static lnet_nid_t *allocate_create_nid_array(char **nids, __u32 num_nids,
 442                                              char *err_str)
 443 {
 444         lnet_nid_t *array = NULL;
 445         __u32 i;
 446
 447         if (!nids || num_nids == 0) {
 448                 snprintf(err_str, LNET_MAX_STR_LEN, "no NIDs to add");
 449                 return NULL;
 450         }
 451
 452         array = calloc(sizeof(*array) * num_nids, 1);
 453         if (array == NULL) {
 454                 snprintf(err_str, LNET_MAX_STR_LEN, "out of memory");
 455                 return NULL;
 456         }
 457
 458         for (i = 0; i < num_nids; i++) {
 459                 array[i] = libcfs_str2nid(nids[i]);
 460                 if (array[i] == LNET_NID_ANY) {
 461                         free(array);
 462                         snprintf(err_str, LNET_MAX_STR_LEN,
 463                                  "bad NID: '%s'",
 464                                  nids[i]);
 465                         return NULL;
 466                 }
 467         }
 468
 469         return array;
 470 }
 471
 472 static int dispatch_peer_ni_cmd(lnet_nid_t pnid, lnet_nid_t nid, __u32 cmd,
 473                                 struct lnet_ioctl_peer_cfg *data,
 474                                 char *err_str, char *cmd_str)
 475 {
 476         int rc;
 477
 478         data->prcfg_prim_nid = pnid;
 479         data->prcfg_cfg_nid = nid;
 480
 481         rc = l_ioctl(LNET_DEV_ID, cmd, data);
 482         if (rc != 0) {
 483                 rc = -errno;
 484                 snprintf(err_str,
 485                         LNET_MAX_STR_LEN,
 486                         "\"cannot %s peer ni: %s\"",
 487                         (cmd_str) ? cmd_str : "add", strerror(errno));
 488         }
 489
 490         return rc;
 491 }
 492
 493 static int infra_ping_nid(char *ping_nids, char *oper, int param, int ioc_call,
 494                           int seq_no, struct cYAML **show_rc,
 495                           struct cYAML **err_rc)
 496 {
 497         void *data = NULL;
 498         struct lnet_ioctl_ping_data ping;
 499         struct cYAML *root = NULL, *ping_node = NULL, *item = NULL,
 500                      *first_seq = NULL, *tmp = NULL, *peer_ni = NULL;
 501         lnet_process_id_t id;
 502         char err_str[LNET_MAX_STR_LEN] = {0};
 503         char *sep, *token, *end;
 504         char buf[6];
 505         size_t len;
 506         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 507         int i;
 508         bool flag = false;
 509
 510         len = (sizeof(lnet_process_id_t) * LNET_INTERFACES_MAX_DEFAULT);
 511
 512         data = calloc(1, len);
 513         if (data == NULL)
 514                 goto out;
 515
 516         /* create struct cYAML root object */
 517         root = cYAML_create_object(NULL, NULL);
 518         if (root == NULL)
 519                 goto out;
 520
 521         ping_node = cYAML_create_seq(root, oper);
 522         if (ping_node == NULL)
 523                 goto out;
 524
 525         /* tokenise each nid in string ping_nids */
 526         token = strtok(ping_nids, ",");
 527
 528         do {
 529                 item = cYAML_create_seq_item(ping_node);
 530                 if (item == NULL)
 531                         goto out;
 532
 533                 if (first_seq == NULL)
 534                         first_seq = item;
 535
 536                 /* check if '-' is a part of NID, token */
 537                 sep = strchr(token, '-');
 538                 if (sep == NULL) {
 539                         id.pid = LNET_PID_ANY;
 540                         /* if no net is specified, libcfs_str2nid() will assume tcp */
 541                         id.nid = libcfs_str2nid(token);
 542                         if (id.nid == LNET_NID_ANY) {
 543                                 snprintf(err_str, sizeof(err_str),
 544                                          "\"cannot parse NID '%s'\"",
 545                                          token);
 546                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 547                                 cYAML_build_error(rc, seq_no, MANAGE_CMD,
 548                                                   oper, err_str, err_rc);
 549                                 continue;
 550                         }
 551                 } else {
 552                         if (token[0] == 'u' || token[0] == 'U')
 553                                 id.pid = (strtoul(&token[1], &end, 0) |
 554                                           (LNET_PID_USERFLAG));
 555                         else
 556                                 id.pid = strtoul(token, &end, 0);
 557
 558                         /* assuming '-' is part of hostname */
 559                         if (end != sep) {
 560                                 id.pid = LNET_PID_ANY;
 561                                 id.nid = libcfs_str2nid(token);
 562                                 if (id.nid == LNET_NID_ANY) {
 563                                         snprintf(err_str, sizeof(err_str),
 564                                                  "\"cannot parse NID '%s'\"",
 565                                                  token);
 566                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 567                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 568                                                           oper, err_str,
 569                                                           err_rc);
 570                                         continue;
 571                                 }
 572                         } else {
 573                                 id.nid = libcfs_str2nid(sep + 1);
 574                                 if (id.nid == LNET_NID_ANY) {
 575                                         snprintf(err_str, sizeof(err_str),
 576                                                  "\"cannot parse NID '%s'\"",
 577                                                  token);
 578                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 579                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 580                                                           oper, err_str,
 581                                                           err_rc);
 582                                         continue;
 583                                 }
 584                         }
 585                 }
 586                 LIBCFS_IOC_INIT_V2(ping, ping_hdr);
 587                 ping.ping_hdr.ioc_len = sizeof(ping);
 588                 ping.ping_id          = id;
 589                 ping.op_param         = param;
 590                 ping.ping_count       = LNET_INTERFACES_MAX_DEFAULT;
 591                 ping.ping_buf         = data;
 592
 593                 rc = l_ioctl(LNET_DEV_ID, ioc_call, &ping);
 594                 if (rc != 0) {
 595                         snprintf(err_str,
 596                                  sizeof(err_str), "failed to %s %s: %s\n", oper,
 597                                  id.pid == LNET_PID_ANY ?
 598                                  libcfs_nid2str(id.nid) :
 599                                  libcfs_id2str(id), strerror(errno));
 600                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 601                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 602                                           oper, err_str, err_rc);
 603                         continue;
 604                 }
 605
 606                 if (cYAML_create_string(item, "primary nid",
 607                                         libcfs_nid2str(ping.ping_id.nid)) == NULL)
 608                         goto out;
 609
 610                 if (cYAML_create_string(item, "Multi-Rail", ping.mr_info ?
 611                                         "True" : "False") == NULL)
 612                         goto out;
 613
 614                 tmp = cYAML_create_seq(item, "peer ni");
 615                 if (tmp == NULL)
 616                         goto out;
 617
 618                 for (i = 0; i < ping.ping_count; i++) {
 619                         if (!strcmp(libcfs_nid2str(ping.ping_buf[i].nid),
 620                                     "0@lo"))
 621                                 continue;
 622                         peer_ni = cYAML_create_seq_item(tmp);
 623                         if (peer_ni == NULL)
 624                                 goto out;
 625                         memset(buf, 0, sizeof buf);
 626                         snprintf(buf, sizeof buf, "nid");
 627                         if (cYAML_create_string(peer_ni, buf,
 628                                                 libcfs_nid2str(ping.ping_buf[i].nid)) == NULL)
 629                                 goto out;
 630                 }
 631
 632                 flag = true;
 633
 634         } while ((token = strtok(NULL, ",")) != NULL);
 635
 636         if (flag)
 637                 rc = LUSTRE_CFG_RC_NO_ERR;
 638
 639 out:
 640         if (data)
 641                 free(data);
 642         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
 643                 cYAML_free_tree(root);
 644         } else if (show_rc != NULL && *show_rc != NULL) {
 645                 struct cYAML *show_node;
 646                 show_node = cYAML_get_object_item(*show_rc, oper);
 647                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 648                         cYAML_insert_child(show_node, first_seq);
 649                         free(ping_node);
 650                         free(root);
 651                 } else if (show_node == NULL) {
 652                         cYAML_insert_sibling((*show_rc)->cy_child,
 653                                              ping_node);
 654                         free(root);
 655                 } else {
 656                         cYAML_free_tree(root);
 657                 }
 658         } else {
 659                 *show_rc = root;
 660         }
 661
 662         return rc;
 663 }
 664
 665 int lustre_lnet_ping_nid(char *ping_nids, int timeout, int seq_no,
 666                          struct cYAML **show_rc, struct cYAML **err_rc)
 667 {
 668         int rc;
 669
 670         rc = infra_ping_nid(ping_nids, "ping", timeout, IOC_LIBCFS_PING_PEER,
 671                             seq_no, show_rc, err_rc);
 672         return rc;
 673 }
 674
 675 int lustre_lnet_discover_nid(char *ping_nids, int force, int seq_no,
 676                          struct cYAML **show_rc, struct cYAML **err_rc)
 677 {
 678         int rc;
 679
 680         rc = infra_ping_nid(ping_nids, "discover", force, IOC_LIBCFS_DISCOVER,
 681                             seq_no, show_rc, err_rc);
 682         return rc;
 683 }
 684
 685 int lustre_lnet_config_peer_nid(char *pnid, char **nid, int num_nids,
 686                                 bool mr, int seq_no, struct cYAML **err_rc)
 687 {
 688         struct lnet_ioctl_peer_cfg data;
 689         lnet_nid_t prim_nid = LNET_NID_ANY;
 690         int rc = LUSTRE_CFG_RC_NO_ERR;
 691         int idx = 0;
 692         bool nid0_used = false;
 693         char err_str[LNET_MAX_STR_LEN] = {0};
 694         lnet_nid_t *nids = allocate_create_nid_array(nid, num_nids, err_str);
 695
 696         if (pnid) {
 697                 prim_nid = libcfs_str2nid(pnid);
 698                 if (prim_nid == LNET_NID_ANY) {
 699                         snprintf(err_str, sizeof(err_str),
 700                                  "bad key NID: '%s'",
 701                                  pnid);
 702                         rc = LUSTRE_CFG_RC_MISSING_PARAM;
 703                         goto out;
 704                 }
 705         } else if (!nids || nids[0] == LNET_NID_ANY) {
 706                 snprintf(err_str, sizeof(err_str),
 707                          "no NIDs provided for configuration");
 708                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 709                 goto out;
 710         } else {
 711                 prim_nid = LNET_NID_ANY;
 712         }
 713
 714         snprintf(err_str, sizeof(err_str), "\"Success\"");
 715
 716         LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
 717         data.prcfg_mr = mr;
 718
 719         /*
 720          * if prim_nid is not specified use the first nid in the list of
 721          * nids provided as the prim_nid. NOTE: on entering 'if' we must
 722          * have at least 1 NID
 723          */
 724         if (prim_nid == LNET_NID_ANY) {
 725                 nid0_used = true;
 726                 prim_nid = nids[0];
 727         }
 728
 729         /* Create the prim_nid first */
 730         rc = dispatch_peer_ni_cmd(prim_nid, LNET_NID_ANY,
 731                                   IOC_LIBCFS_ADD_PEER_NI,
 732                                   &data, err_str, "add");
 733
 734         if (rc != 0)
 735                 goto out;
 736
 737         /* add the rest of the nids to the key nid if any are available */
 738         for (idx = nid0_used ? 1 : 0 ; nids && idx < num_nids; idx++) {
 739                 /*
 740                  * If prim_nid is not provided then the first nid in the
 741                  * list becomes the prim_nid. First time round the loop use
 742                  * LNET_NID_ANY for the first parameter, then use nid[0]
 743                  * as the key nid after wards
 744                  */
 745                 rc = dispatch_peer_ni_cmd(prim_nid, nids[idx],
 746                                           IOC_LIBCFS_ADD_PEER_NI, &data,
 747                                           err_str, "add");
 748
 749                 if (rc != 0)
 750                         goto out;
 751         }
 752
 753 out:
 754         if (nids != NULL)
 755                 free(nids);
 756         cYAML_build_error(rc, seq_no, ADD_CMD, "peer_ni", err_str, err_rc);
 757         return rc;
 758 }
 759
 760 int lustre_lnet_del_peer_nid(char *pnid, char **nid, int num_nids,
 761                              int seq_no, struct cYAML **err_rc)
 762 {
 763         struct lnet_ioctl_peer_cfg data;
 764         lnet_nid_t prim_nid;
 765         int rc = LUSTRE_CFG_RC_NO_ERR;
 766         int idx = 0;
 767         char err_str[LNET_MAX_STR_LEN] = {0};
 768         lnet_nid_t *nids = allocate_create_nid_array(nid, num_nids, err_str);
 769
 770         if (pnid == NULL) {
 771                 snprintf(err_str, sizeof(err_str),
 772                          "\"Primary nid is not provided\"");
 773                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 774                 goto out;
 775         } else {
 776                 prim_nid = libcfs_str2nid(pnid);
 777                 if (prim_nid == LNET_NID_ANY) {
 778                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 779                         snprintf(err_str, sizeof(err_str),
 780                                  "bad key NID: '%s'",
 781                                  pnid);
 782                         goto out;
 783                 }
 784         }
 785
 786         snprintf(err_str, sizeof(err_str), "\"Success\"");
 787
 788         LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
 789         if (!nids || nids[0] == LNET_NID_ANY) {
 790                 rc = dispatch_peer_ni_cmd(prim_nid, LNET_NID_ANY,
 791                                           IOC_LIBCFS_DEL_PEER_NI,
 792                                           &data, err_str, "del");
 793                 goto out;
 794         }
 795
 796         for (idx = 0; nids && idx < num_nids; idx++) {
 797                 rc = dispatch_peer_ni_cmd(prim_nid, nids[idx],
 798                                           IOC_LIBCFS_DEL_PEER_NI, &data,
 799                                           err_str, "del");
 800
 801                 if (rc != 0)
 802                         goto out;
 803         }
 804
 805 out:
 806         if (nids != NULL)
 807                 free(nids);
 808         cYAML_build_error(rc, seq_no, DEL_CMD, "peer_ni", err_str, err_rc);
 809         return rc;
 810 }
 811
 812 int lustre_lnet_config_route(char *nw, char *gw, int hops, int prio,
 813                              int seq_no, struct cYAML **err_rc)
 814 {
 815         struct lnet_ioctl_config_data data;
 816         lnet_nid_t gateway_nid;
 817         int rc = LUSTRE_CFG_RC_NO_ERR;
 818         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 819         char err_str[LNET_MAX_STR_LEN];
 820
 821         snprintf(err_str, sizeof(err_str), "\"Success\"");
 822
 823         if (nw == NULL || gw == NULL) {
 824                 snprintf(err_str,
 825                          sizeof(err_str),
 826                          "\"missing mandatory parameter(s): '%s'\"",
 827                          (nw == NULL && gw == NULL) ? "network, gateway" :
 828                          (nw == NULL) ? "network" : "gateway");
 829                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 830                 goto out;
 831         }
 832
 833         net = libcfs_str2net(nw);
 834         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 835                 snprintf(err_str,
 836                          sizeof(err_str),
 837                          "\"cannot parse net %s\"", nw);
 838                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 839                 goto out;
 840         }
 841
 842         gateway_nid = libcfs_str2nid(gw);
 843         if (gateway_nid == LNET_NID_ANY) {
 844                 snprintf(err_str,
 845                         sizeof(err_str),
 846                         "\"cannot parse gateway NID '%s'\"", gw);
 847                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 848                 goto out;
 849         }
 850
 851         if (hops == -1) {
 852                 /* hops is undefined */
 853                 hops = LNET_UNDEFINED_HOPS;
 854         } else if (hops < 1 || hops > 255) {
 855                 snprintf(err_str,
 856                         sizeof(err_str),
 857                         "\"invalid hop count %d, must be between 1 and 255\"",
 858                         hops);
 859                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 860                 goto out;
 861         }
 862
 863         if (prio == -1) {
 864                 prio = 0;
 865         } else if (prio < 0) {
 866                 snprintf(err_str,
 867                          sizeof(err_str),
 868                         "\"invalid priority %d, must be greater than 0\"",
 869                         prio);
 870                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 871                 goto out;
 872         }
 873
 874         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 875         data.cfg_net = net;
 876         data.cfg_config_u.cfg_route.rtr_hop = hops;
 877         data.cfg_config_u.cfg_route.rtr_priority = prio;
 878         data.cfg_nid = gateway_nid;
 879
 880         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_ROUTE, &data);
 881         if (rc != 0) {
 882                 rc = -errno;
 883                 snprintf(err_str,
 884                          sizeof(err_str),
 885                          "\"cannot add route: %s\"", strerror(errno));
 886                 goto out;
 887         }
 888
 889 out:
 890         cYAML_build_error(rc, seq_no, ADD_CMD, "route", err_str, err_rc);
 891
 892         return rc;
 893 }
 894
 895 int lustre_lnet_del_route(char *nw, char *gw,
 896                           int seq_no, struct cYAML **err_rc)
 897 {
 898         struct lnet_ioctl_config_data data;
 899         lnet_nid_t gateway_nid;
 900         int rc = LUSTRE_CFG_RC_NO_ERR;
 901         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 902         char err_str[LNET_MAX_STR_LEN];
 903
 904         snprintf(err_str, sizeof(err_str), "\"Success\"");
 905
 906         if (nw == NULL || gw == NULL) {
 907                 snprintf(err_str,
 908                          sizeof(err_str),
 909                          "\"missing mandatory parameter(s): '%s'\"",
 910                          (nw == NULL && gw == NULL) ? "network, gateway" :
 911                          (nw == NULL) ? "network" : "gateway");
 912                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 913                 goto out;
 914         }
 915
 916         net = libcfs_str2net(nw);
 917         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 918                 snprintf(err_str,
 919                          sizeof(err_str),
 920                          "\"cannot parse net '%s'\"", nw);
 921                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 922                 goto out;
 923         }
 924
 925         gateway_nid = libcfs_str2nid(gw);
 926         if (gateway_nid == LNET_NID_ANY) {
 927                 snprintf(err_str,
 928                          sizeof(err_str),
 929                          "\"cannot parse gateway NID '%s'\"", gw);
 930                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 931                 goto out;
 932         }
 933
 934         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 935         data.cfg_net = net;
 936         data.cfg_nid = gateway_nid;
 937
 938         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_ROUTE, &data);
 939         if (rc != 0) {
 940                 rc = -errno;
 941                 snprintf(err_str,
 942                          sizeof(err_str),
 943                          "\"cannot delete route: %s\"", strerror(errno));
 944                 goto out;
 945         }
 946
 947 out:
 948         cYAML_build_error(rc, seq_no, DEL_CMD, "route", err_str, err_rc);
 949
 950         return rc;
 951 }
 952
 953 int lustre_lnet_show_route(char *nw, char *gw, int hops, int prio, int detail,
 954                            int seq_no, struct cYAML **show_rc,
 955                            struct cYAML **err_rc)
 956 {
 957         struct lnet_ioctl_config_data data;
 958         lnet_nid_t gateway_nid;
 959         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 960         int l_errno = 0;
 961         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 962         int i;
 963         struct cYAML *root = NULL, *route = NULL, *item = NULL;
 964         struct cYAML *first_seq = NULL;
 965         char err_str[LNET_MAX_STR_LEN];
 966         bool exist = false;
 967
 968         snprintf(err_str, sizeof(err_str),
 969                  "\"out of memory\"");
 970
 971         if (nw != NULL) {
 972                 net = libcfs_str2net(nw);
 973                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 974                         snprintf(err_str,
 975                                  sizeof(err_str),
 976                                  "\"cannot parse net '%s'\"", nw);
 977                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 978                         goto out;
 979                 }
 980
 981         } else {
 982                 /* show all routes without filtering on net */
 983                 net = LNET_NIDNET(LNET_NID_ANY);
 984         }
 985
 986         if (gw != NULL) {
 987                 gateway_nid = libcfs_str2nid(gw);
 988                 if (gateway_nid == LNET_NID_ANY) {
 989                         snprintf(err_str,
 990                                  sizeof(err_str),
 991                                  "\"cannot parse gateway NID '%s'\"", gw);
 992                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 993                         goto out;
 994                 }
 995         } else
 996                 /* show all routes with out filtering on gateway */
 997                 gateway_nid = LNET_NID_ANY;
 998
 999         if ((hops < 1 && hops != -1) || hops > 255) {
1000                 snprintf(err_str,
1001                          sizeof(err_str),
1002                          "\"invalid hop count %d, must be between 0 and 256\"",
1003                          hops);
1004                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1005                 goto out;
1006         }
1007
1008         /* create struct cYAML root object */
1009         root = cYAML_create_object(NULL, NULL);
1010         if (root == NULL)
1011                 goto out;
1012
1013         route = cYAML_create_seq(root, "route");
1014         if (route == NULL)
1015                 goto out;
1016
1017         for (i = 0;; i++) {
1018                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
1019                 data.cfg_count = i;
1020
1021                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_ROUTE, &data);
1022                 if (rc != 0) {
1023                         l_errno = errno;
1024                         break;
1025                 }
1026
1027                 /* filter on provided data */
1028                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
1029                     net != data.cfg_net)
1030                         continue;
1031
1032                 if (gateway_nid != LNET_NID_ANY &&
1033                     gateway_nid != data.cfg_nid)
1034                         continue;
1035
1036                 if (hops != -1 &&
1037                     hops != data.cfg_config_u.cfg_route.rtr_hop)
1038                         continue;
1039
1040                 if (prio != -1 &&
1041                     prio != data.cfg_config_u.cfg_route.rtr_priority)
1042                         continue;
1043
1044                 /* default rc to -1 incase we hit the goto */
1045                 rc = -1;
1046                 exist = true;
1047
1048                 item = cYAML_create_seq_item(route);
1049                 if (item == NULL)
1050                         goto out;
1051
1052                 if (first_seq == NULL)
1053                         first_seq = item;
1054
1055                 if (cYAML_create_string(item, "net",
1056                                         libcfs_net2str(data.cfg_net)) == NULL)
1057                         goto out;
1058
1059                 if (cYAML_create_string(item, "gateway",
1060                                         libcfs_nid2str(data.cfg_nid)) == NULL)
1061                         goto out;
1062
1063                 if (detail) {
1064                         if (cYAML_create_number(item, "hop",
1065                                                 (int) data.cfg_config_u.
1066                                                 cfg_route.rtr_hop) ==
1067                             NULL)
1068                                 goto out;
1069
1070                         if (cYAML_create_number(item, "priority",
1071                                                 data.cfg_config_u.
1072                                                 cfg_route.rtr_priority) == NULL)
1073                                 goto out;
1074
1075                         if (cYAML_create_string(item, "state",
1076                                                 data.cfg_config_u.cfg_route.
1077                                                         rtr_flags ?
1078                                                 "up" : "down") == NULL)
1079                                 goto out;
1080                 }
1081         }
1082
1083         /* print output iff show_rc is not provided */
1084         if (show_rc == NULL)
1085                 cYAML_print_tree(root);
1086
1087         if (l_errno != ENOENT) {
1088                 snprintf(err_str,
1089                          sizeof(err_str),
1090                          "\"cannot get routes: %s\"",
1091                          strerror(l_errno));
1092                 rc = -l_errno;
1093                 goto out;
1094         } else
1095                 rc = LUSTRE_CFG_RC_NO_ERR;
1096
1097         snprintf(err_str, sizeof(err_str), "\"success\"");
1098 out:
1099         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
1100                 cYAML_free_tree(root);
1101         } else if (show_rc != NULL && *show_rc != NULL) {
1102                 struct cYAML *show_node;
1103                 /* find the route node, if one doesn't exist then
1104                  * insert one.  Otherwise add to the one there
1105                  */
1106                 show_node = cYAML_get_object_item(*show_rc, "route");
1107                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
1108                         cYAML_insert_child(show_node, first_seq);
1109                         free(route);
1110                         free(root);
1111                 } else if (show_node == NULL) {
1112                         cYAML_insert_sibling((*show_rc)->cy_child,
1113                                                 route);
1114                         free(root);
1115                 } else {
1116                         cYAML_free_tree(root);
1117                 }
1118         } else {
1119                 *show_rc = root;
1120         }
1121
1122         cYAML_build_error(rc, seq_no, SHOW_CMD, "route", err_str, err_rc);
1123
1124         return rc;
1125 }
1126
1127 static int socket_intf_query(int request, char *intf,
1128                              struct ifreq *ifr)
1129 {
1130         int rc = 0;
1131         int sockfd;
1132
1133         if (strlen(intf) >= IFNAMSIZ || ifr == NULL)
1134                 return LUSTRE_CFG_RC_BAD_PARAM;
1135
1136         sockfd = socket(AF_INET, SOCK_DGRAM, 0);
1137         if (sockfd < 0)
1138                 return LUSTRE_CFG_RC_BAD_PARAM;
1139
1140         strcpy(ifr->ifr_name, intf);
1141         rc = ioctl(sockfd, request, ifr);
1142         if (rc != 0)
1143                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1144
1145         close(sockfd);
1146
1147         return rc;
1148 }
1149
1150 /*
1151  * for each interface in the array of interfaces find the IP address of
1152  * that interface, create its nid and add it to an array of NIDs.
1153  * Stop if any of the interfaces is down
1154  */
1155 static int lustre_lnet_intf2nids(struct lnet_dlc_network_descr *nw,
1156                                  lnet_nid_t **nids, __u32 *nnids)
1157 {
1158         int i = 0, count = 0, rc;
1159         struct ifreq ifr;
1160         __u32 ip;
1161         struct lnet_dlc_intf_descr *intf;
1162
1163         if (nw == NULL || nids == NULL)
1164                 return LUSTRE_CFG_RC_BAD_PARAM;
1165
1166         list_for_each_entry(intf, &nw->nw_intflist, intf_on_network)
1167                 count++;
1168
1169         *nids = calloc(count, sizeof(lnet_nid_t));
1170         if (*nids == NULL)
1171                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1172
1173         list_for_each_entry(intf, &nw->nw_intflist, intf_on_network) {
1174                 memset(&ifr, 0, sizeof(ifr));
1175                 rc = socket_intf_query(SIOCGIFFLAGS, intf->intf_name, &ifr);
1176                 if (rc != 0)
1177                         goto failed;
1178
1179                 if ((ifr.ifr_flags & IFF_UP) == 0) {
1180                         rc = LUSTRE_CFG_RC_BAD_PARAM;
1181                         goto failed;
1182                 }
1183
1184                 memset(&ifr, 0, sizeof(ifr));
1185                 rc = socket_intf_query(SIOCGIFADDR, intf->intf_name, &ifr);
1186                 if (rc != 0)
1187                         goto failed;
1188
1189                 ip = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
1190                 ip = bswap_32(ip);
1191                 (*nids)[i] = LNET_MKNID(nw->nw_id, ip);
1192                 i++;
1193         }
1194
1195         *nnids = count;
1196
1197         return 0;
1198
1199 failed:
1200         free(*nids);
1201         *nids = NULL;
1202         return rc;
1203 }
1204
1205 /*
1206  * called repeatedly until a match or no more ip range
1207  * What do you have?
1208  *      ip_range expression
1209  *      interface list with all the interface names.
1210  *      all the interfaces in the system.
1211  *
1212  *      try to match the ip_range expr to one of the interfaces' IPs in
1213  *      the system. If we hit a patch for an interface. Check if that
1214  *      interface name is in the list.
1215  *
1216  *      If there are more than one interface in the list, then make sure
1217  *      that the IPs for all of these interfaces match the ip ranges
1218  *      given.
1219  *
1220  *      for each interface in intf_list
1221  *              look up the intf name in ifa
1222  *              if not there then no match
1223  *              check ip obtained from ifa against a match to any of the
1224  *              ip_ranges given.
1225  *              If no match, then fail
1226  *
1227  *      The result is that all the interfaces have to match.
1228  */
1229 int lustre_lnet_match_ip_to_intf(struct ifaddrs *ifa,
1230                                  struct list_head *intf_list,
1231                                  struct list_head *ip_ranges)
1232 {
1233         int rc;
1234         __u32 ip;
1235         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1236         struct ifaddrs *ifaddr = ifa;
1237         struct lustre_lnet_ip_range_descr *ip_range;
1238         int family;
1239
1240         /*
1241          * if there are no explicit interfaces, and no ip ranges, then
1242          * configure the first tcp interface we encounter.
1243          */
1244         if (list_empty(intf_list) && list_empty(ip_ranges)) {
1245                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1246                         if (ifaddr->ifa_addr == NULL)
1247                                 continue;
1248
1249                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1250                                 continue;
1251
1252                         family = ifaddr->ifa_addr->sa_family;
1253                         if (family == AF_INET &&
1254                             strcmp(ifaddr->ifa_name, "lo") != 0) {
1255                                 rc = lustre_lnet_add_intf_descr
1256                                         (intf_list, ifaddr->ifa_name,
1257                                         strlen(ifaddr->ifa_name));
1258
1259                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
1260                                         return rc;
1261
1262                                 return LUSTRE_CFG_RC_MATCH;
1263                         }
1264                 }
1265                 return LUSTRE_CFG_RC_NO_MATCH;
1266         }
1267
1268         /*
1269          * First interface which matches an IP pattern will be used
1270          */
1271         if (list_empty(intf_list)) {
1272                 /*
1273                  * no interfaces provided in the rule, but an ip range is
1274                  * provided, so try and match an interface to the ip
1275                  * range.
1276                  */
1277                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1278                         if (ifaddr->ifa_addr == NULL)
1279                                 continue;
1280
1281                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1282                                 continue;
1283
1284                         family = ifaddr->ifa_addr->sa_family;
1285                         if (family == AF_INET) {
1286                                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->
1287                                         sin_addr.s_addr;
1288
1289                                 list_for_each_entry(ip_range, ip_ranges,
1290                                                     ipr_entry) {
1291                                         rc = cfs_ip_addr_match(bswap_32(ip),
1292                                                         &ip_range->ipr_expr);
1293                                         if (!rc)
1294                                                 continue;
1295
1296                                         rc = lustre_lnet_add_intf_descr
1297                                           (intf_list, ifaddr->ifa_name,
1298                                            strlen(ifaddr->ifa_name));
1299
1300                                         if (rc != LUSTRE_CFG_RC_NO_ERR)
1301                                                 return rc;
1302                                 }
1303                         }
1304                 }
1305
1306                 if (!list_empty(intf_list))
1307                         return LUSTRE_CFG_RC_MATCH;
1308
1309                 return LUSTRE_CFG_RC_NO_MATCH;
1310         }
1311
1312         /*
1313          * If an interface is explicitly specified the ip-range might or
1314          * might not be specified. if specified the interface needs to match the
1315          * ip-range. If no ip-range then the interfaces are
1316          * automatically matched if they are all up.
1317          * If > 1 interfaces all the interfaces must match for the NI to
1318          * be configured.
1319          */
1320         list_for_each_entry_safe(intf_descr, tmp, intf_list, intf_on_network) {
1321                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1322                         if (ifaddr->ifa_addr == NULL)
1323                                 continue;
1324
1325                         family = ifaddr->ifa_addr->sa_family;
1326                         if (family == AF_INET &&
1327                             strcmp(intf_descr->intf_name,
1328                                    ifaddr->ifa_name) == 0)
1329                                 break;
1330                 }
1331
1332                 if (ifaddr == NULL) {
1333                         list_del(&intf_descr->intf_on_network);
1334                         free_intf_descr(intf_descr);
1335                         continue;
1336                 }
1337
1338                 if ((ifaddr->ifa_flags & IFF_UP) == 0) {
1339                         list_del(&intf_descr->intf_on_network);
1340                         free_intf_descr(intf_descr);
1341                         continue;
1342                 }
1343
1344                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->sin_addr.s_addr;
1345
1346                 rc = 1;
1347                 list_for_each_entry(ip_range, ip_ranges, ipr_entry) {
1348                         rc = cfs_ip_addr_match(bswap_32(ip), &ip_range->ipr_expr);
1349                         if (rc)
1350                                 break;
1351                 }
1352
1353                 if (!rc) {
1354                         /* no match for this interface */
1355                         list_del(&intf_descr->intf_on_network);
1356                         free_intf_descr(intf_descr);
1357                 }
1358         }
1359
1360         return LUSTRE_CFG_RC_MATCH;
1361 }
1362
1363 int lustre_lnet_resolve_ip2nets_rule(struct lustre_lnet_ip2nets *ip2nets,
1364                                      lnet_nid_t **nids, __u32 *nnids)
1365 {
1366         struct ifaddrs *ifa;
1367         int rc = LUSTRE_CFG_RC_NO_ERR;
1368
1369         rc = getifaddrs(&ifa);
1370         if (rc < 0)
1371                 return -errno;
1372
1373         rc = lustre_lnet_match_ip_to_intf(ifa,
1374                                           &ip2nets->ip2nets_net.nw_intflist,
1375                                           &ip2nets->ip2nets_ip_ranges);
1376         if (rc != LUSTRE_CFG_RC_MATCH) {
1377                 freeifaddrs(ifa);
1378                 return rc;
1379         }
1380
1381         rc = lustre_lnet_intf2nids(&ip2nets->ip2nets_net, nids, nnids);
1382         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1383                 *nids = NULL;
1384                 *nnids = 0;
1385         }
1386
1387         freeifaddrs(ifa);
1388
1389         return rc;
1390 }
1391
1392 static int
1393 lustre_lnet_ioctl_config_ni(struct list_head *intf_list,
1394                             struct lnet_ioctl_config_lnd_tunables *tunables,
1395                             struct cfs_expr_list *global_cpts,
1396                             lnet_nid_t *nids, char *err_str)
1397 {
1398         char *data;
1399         struct lnet_ioctl_config_ni *conf;
1400         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1401         int rc = LUSTRE_CFG_RC_NO_ERR, i = 0;
1402         size_t len;
1403         int count;
1404         struct lnet_dlc_intf_descr *intf_descr;
1405         __u32 *cpt_array;
1406         struct cfs_expr_list *cpt_expr;
1407
1408         list_for_each_entry(intf_descr, intf_list,
1409                             intf_on_network) {
1410                 if (tunables != NULL)
1411                         len = sizeof(struct lnet_ioctl_config_ni) +
1412                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1413                 else
1414                         len = sizeof(struct lnet_ioctl_config_ni);
1415
1416                 data = calloc(1, len);
1417                 if (!data)
1418                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1419                 conf = (struct lnet_ioctl_config_ni*) data;
1420                 if (tunables != NULL)
1421                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1422                                 conf->lic_bulk;
1423
1424                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1425                 conf->lic_cfg_hdr.ioc_len = len;
1426                 conf->lic_nid = nids[i];
1427                 strncpy(conf->lic_ni_intf[0], intf_descr->intf_name,
1428                         LNET_MAX_STR_LEN);
1429
1430                 if (intf_descr->cpt_expr != NULL)
1431                         cpt_expr = intf_descr->cpt_expr;
1432                 else if (global_cpts != NULL)
1433                         cpt_expr = global_cpts;
1434                 else
1435                         cpt_expr = NULL;
1436
1437                 if (cpt_expr != NULL) {
1438                         count = cfs_expr_list_values(cpt_expr,
1439                                                      LNET_MAX_SHOW_NUM_CPT,
1440                                                      &cpt_array);
1441                         if (count > 0) {
1442                                 memcpy(conf->lic_cpts, cpt_array,
1443                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1444                                 free(cpt_array);
1445                         } else {
1446                                 count = 0;
1447                         }
1448                 } else {
1449                         count = 0;
1450                 }
1451
1452                 conf->lic_ncpts = count;
1453
1454                 if (tunables != NULL)
1455                         memcpy(tun, tunables, sizeof(*tunables));
1456
1457                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1458                 if (rc < 0) {
1459                         rc = -errno;
1460                         snprintf(err_str,
1461                                  LNET_MAX_STR_LEN,
1462                                  "\"cannot add network: %s\"", strerror(errno));
1463                         free(data);
1464                         return rc;
1465                 }
1466                 free(data);
1467                 i++;
1468         }
1469
1470         return LUSTRE_CFG_RC_NO_ERR;
1471 }
1472
1473 int
1474 lustre_lnet_config_ip2nets(struct lustre_lnet_ip2nets *ip2nets,
1475                            struct lnet_ioctl_config_lnd_tunables *tunables,
1476                            struct cfs_expr_list *global_cpts,
1477                            int seq_no, struct cYAML **err_rc)
1478 {
1479         lnet_nid_t *nids = NULL;
1480         __u32 nnids = 0;
1481         int rc;
1482         char err_str[LNET_MAX_STR_LEN];
1483
1484         snprintf(err_str, sizeof(err_str), "\"success\"");
1485
1486         if (!ip2nets) {
1487                 snprintf(err_str,
1488                          sizeof(err_str),
1489                          "\"incomplete ip2nets information\"");
1490                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1491                 goto out;
1492         }
1493
1494         /*
1495          * call below function to resolve the rules into a list of nids.
1496          * The memory is allocated in that function then freed here when
1497          * it's no longer needed.
1498          */
1499         rc = lustre_lnet_resolve_ip2nets_rule(ip2nets, &nids, &nnids);
1500         if (rc != LUSTRE_CFG_RC_NO_ERR && rc != LUSTRE_CFG_RC_MATCH) {
1501                 snprintf(err_str,
1502                          sizeof(err_str),
1503                          "\"cannot resolve ip2nets rule\"");
1504                 goto out;
1505         }
1506
1507         if (list_empty(&ip2nets->ip2nets_net.nw_intflist)) {
1508                 snprintf(err_str, sizeof(err_str),
1509                          "\"no interfaces match ip2nets rules\"");
1510                 goto free_nids_out;
1511         }
1512
1513         rc = lustre_lnet_ioctl_config_ni(&ip2nets->ip2nets_net.nw_intflist,
1514                                          tunables, global_cpts, nids,
1515                                          err_str);
1516
1517 free_nids_out:
1518         free(nids);
1519
1520 out:
1521         cYAML_build_error(rc, seq_no, ADD_CMD, "ip2nets", err_str, err_rc);
1522         return rc;
1523 }
1524
1525 int lustre_lnet_config_ni(struct lnet_dlc_network_descr *nw_descr,
1526                           struct cfs_expr_list *global_cpts,
1527                           char *ip2net,
1528                           struct lnet_ioctl_config_lnd_tunables *tunables,
1529                           int seq_no, struct cYAML **err_rc)
1530 {
1531         char *data = NULL;
1532         struct lnet_ioctl_config_ni *conf;
1533         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1534         char buf[LNET_MAX_STR_LEN];
1535         int rc = LUSTRE_CFG_RC_NO_ERR;
1536         char err_str[LNET_MAX_STR_LEN];
1537         lnet_nid_t *nids = NULL;
1538         __u32 nnids = 0;
1539         size_t len;
1540         int count;
1541         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1542         __u32 *cpt_array;
1543
1544         snprintf(err_str, sizeof(err_str), "\"success\"");
1545
1546         if (ip2net == NULL && nw_descr == NULL) {
1547                 snprintf(err_str,
1548                          sizeof(err_str),
1549                          "\"mandatory parameters not specified.\"");
1550                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1551                 goto out;
1552         }
1553
1554         if (ip2net != NULL && strlen(ip2net) >= sizeof(buf)) {
1555                 snprintf(err_str,
1556                          sizeof(err_str),
1557                          "\"ip2net string too long %d\"",
1558                                 (int)strlen(ip2net));
1559                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1560                 goto out;
1561         }
1562
1563         if (ip2net != NULL) {
1564                 if (tunables != NULL)
1565                         len = sizeof(struct lnet_ioctl_config_ni) +
1566                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1567                 else
1568                         len = sizeof(struct lnet_ioctl_config_ni);
1569                 data = calloc(1, len);
1570                 if (!data) {
1571                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1572                         goto out;
1573                 }
1574                 conf = (struct lnet_ioctl_config_ni*) data;
1575                 if (tunables != NULL)
1576                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1577                                 (data + sizeof(*conf));
1578
1579                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1580                 conf->lic_cfg_hdr.ioc_len = len;
1581                 strncpy(conf->lic_legacy_ip2nets, ip2net,
1582                         LNET_MAX_STR_LEN);
1583
1584                 if (global_cpts != NULL) {
1585                         count = cfs_expr_list_values(global_cpts,
1586                                                      LNET_MAX_SHOW_NUM_CPT,
1587                                                      &cpt_array);
1588                         if (count > 0) {
1589                                 memcpy(conf->lic_cpts, cpt_array,
1590                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1591                                 free(cpt_array);
1592                         } else {
1593                                 count = 0;
1594                         }
1595                 } else {
1596                         count = 0;
1597                 }
1598
1599                 conf->lic_ncpts = count;
1600
1601                 if (tunables != NULL)
1602                         memcpy(tun, tunables, sizeof(*tunables));
1603
1604                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1605                 if (rc < 0) {
1606                         rc = -errno;
1607                         snprintf(err_str,
1608                                 sizeof(err_str),
1609                                 "\"cannot add network: %s\"", strerror(errno));
1610                         goto out;
1611                 }
1612
1613                 goto out;
1614         }
1615
1616         if (LNET_NETTYP(nw_descr->nw_id) == LOLND) {
1617                 rc = LUSTRE_CFG_RC_NO_ERR;
1618                 goto out;
1619         }
1620
1621         if (nw_descr->nw_id == LNET_NIDNET(LNET_NID_ANY)) {
1622                 snprintf(err_str,
1623                         sizeof(err_str),
1624                         "\"cannot parse net '%s'\"",
1625                         libcfs_net2str(nw_descr->nw_id));
1626                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1627                 goto out;
1628         }
1629
1630         if (list_empty(&nw_descr->nw_intflist)) {
1631                 snprintf(err_str,
1632                         sizeof(err_str),
1633                         "\"no interface name provided\"");
1634                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1635                 goto out;
1636         }
1637
1638         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids);
1639         if (rc != 0) {
1640                 snprintf(err_str, sizeof(err_str),
1641                          "\"bad parameter\"");
1642                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1643                 goto out;
1644         }
1645
1646         rc = lustre_lnet_ioctl_config_ni(&nw_descr->nw_intflist,
1647                                          tunables, global_cpts, nids,
1648                                          err_str);
1649
1650 out:
1651         if (nw_descr != NULL) {
1652                 list_for_each_entry_safe(intf_descr, tmp,
1653                                          &nw_descr->nw_intflist,
1654                                          intf_on_network) {
1655                         list_del(&intf_descr->intf_on_network);
1656                         free_intf_descr(intf_descr);
1657                 }
1658         }
1659
1660         cYAML_build_error(rc, seq_no, ADD_CMD, "net", err_str, err_rc);
1661
1662         if (nids)
1663                 free(nids);
1664
1665         if (data)
1666                 free(data);
1667
1668         return rc;
1669 }
1670
1671 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw_descr,
1672                        int seq_no, struct cYAML **err_rc)
1673 {
1674         struct lnet_ioctl_config_ni data;
1675         int rc = LUSTRE_CFG_RC_NO_ERR, i;
1676         char err_str[LNET_MAX_STR_LEN];
1677         lnet_nid_t *nids = NULL;
1678         __u32 nnids = 0;
1679         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1680
1681         snprintf(err_str, sizeof(err_str), "\"success\"");
1682
1683         if (nw_descr == NULL) {
1684                 snprintf(err_str,
1685                          sizeof(err_str),
1686                          "\"missing mandatory parameter\"");
1687                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1688                 goto out;
1689         }
1690
1691         if (LNET_NETTYP(nw_descr->nw_id) == LOLND)
1692                 return LUSTRE_CFG_RC_NO_ERR;
1693
1694         if (nw_descr->nw_id == LNET_NIDNET(LNET_NID_ANY)) {
1695                 snprintf(err_str,
1696                          sizeof(err_str),
1697                          "\"cannot parse net '%s'\"",
1698                          libcfs_net2str(nw_descr->nw_id));
1699                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1700                 goto out;
1701         }
1702
1703         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids);
1704         if (rc != 0) {
1705                 snprintf(err_str, sizeof(err_str),
1706                          "\"bad parameter\"");
1707                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1708                 goto out;
1709         }
1710
1711         /*
1712          * no interfaces just the nw_id is specified
1713          */
1714         if (nnids == 0) {
1715                 nids = calloc(1, sizeof(*nids));
1716                 if (nids == NULL) {
1717                         snprintf(err_str, sizeof(err_str),
1718                                 "\"out of memory\"");
1719                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1720                         goto out;
1721                 }
1722                 nids[0] = LNET_MKNID(nw_descr->nw_id, 0);
1723                 nnids = 1;
1724         }
1725
1726         for (i = 0; i < nnids; i++) {
1727                 LIBCFS_IOC_INIT_V2(data, lic_cfg_hdr);
1728                 data.lic_nid = nids[i];
1729
1730                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_LOCAL_NI, &data);
1731                 if (rc < 0) {
1732                         rc = -errno;
1733                         snprintf(err_str,
1734                                 sizeof(err_str),
1735                                 "\"cannot del network: %s\"", strerror(errno));
1736                 }
1737         }
1738
1739         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
1740                                  intf_on_network) {
1741                 list_del(&intf_descr->intf_on_network);
1742                 free_intf_descr(intf_descr);
1743         }
1744
1745 out:
1746         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
1747
1748         if (nids != NULL)
1749                 free(nids);
1750
1751         return rc;
1752 }
1753
1754 static bool
1755 add_msg_stats_to_yaml_blk(struct cYAML *yaml,
1756                           struct lnet_ioctl_comm_count *counts)
1757 {
1758         if (cYAML_create_number(yaml, "put",
1759                                 counts->ico_put_count)
1760                                         == NULL)
1761                 return false;
1762         if (cYAML_create_number(yaml, "get",
1763                                 counts->ico_get_count)
1764                                         == NULL)
1765                 return false;
1766         if (cYAML_create_number(yaml, "reply",
1767                                 counts->ico_reply_count)
1768                                         == NULL)
1769                 return false;
1770         if (cYAML_create_number(yaml, "ack",
1771                                 counts->ico_ack_count)
1772                                         == NULL)
1773                 return false;
1774         if (cYAML_create_number(yaml, "hello",
1775                                 counts->ico_hello_count)
1776                                         == NULL)
1777                 return false;
1778
1779         return true;
1780 }
1781
1782 static struct lnet_ioctl_comm_count *
1783 get_counts(struct lnet_ioctl_element_msg_stats *msg_stats, int idx)
1784 {
1785         if (idx == 0)
1786                 return &msg_stats->im_send_stats;
1787         if (idx == 1)
1788                 return &msg_stats->im_recv_stats;
1789         if (idx == 2)
1790                 return &msg_stats->im_drop_stats;
1791
1792         return NULL;
1793 }
1794
1795 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
1796                          struct cYAML **show_rc, struct cYAML **err_rc)
1797 {
1798         char *buf;
1799         struct lnet_ioctl_config_ni *ni_data;
1800         struct lnet_ioctl_config_lnd_tunables *lnd;
1801         struct lnet_ioctl_element_stats *stats;
1802         struct lnet_ioctl_element_msg_stats msg_stats;
1803         __u32 net = LNET_NIDNET(LNET_NID_ANY);
1804         __u32 prev_net = LNET_NIDNET(LNET_NID_ANY);
1805         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
1806         int l_errno = 0;
1807         struct cYAML *root = NULL, *tunables = NULL,
1808                 *net_node = NULL, *interfaces = NULL,
1809                 *item = NULL, *first_seq = NULL,
1810                 *tmp = NULL, *statistics = NULL;
1811         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
1812         char str_buf[str_buf_len];
1813         char *pos;
1814         char err_str[LNET_MAX_STR_LEN];
1815         bool exist = false, new_net = true;
1816         int net_num = 0;
1817         size_t buf_size = sizeof(*ni_data) + sizeof(*lnd) + sizeof(*stats);
1818
1819         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
1820
1821         buf = calloc(1, buf_size);
1822         if (buf == NULL)
1823                 goto out;
1824
1825         ni_data = (struct lnet_ioctl_config_ni *)buf;
1826
1827         if (nw != NULL) {
1828                 net = libcfs_str2net(nw);
1829                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
1830                         snprintf(err_str,
1831                                  sizeof(err_str),
1832                                  "\"cannot parse net '%s'\"", nw);
1833                         rc = LUSTRE_CFG_RC_BAD_PARAM;
1834                         goto out;
1835                 }
1836         }
1837
1838         root = cYAML_create_object(NULL, NULL);
1839         if (root == NULL)
1840                 goto out;
1841
1842         net_node = cYAML_create_seq(root, "net");
1843         if (net_node == NULL)
1844                 goto out;
1845
1846         for (i = 0;; i++) {
1847                 pos = str_buf;
1848                 __u32 rc_net;
1849
1850                 memset(buf, 0, buf_size);
1851
1852                 LIBCFS_IOC_INIT_V2(*ni_data, lic_cfg_hdr);
1853                 /*
1854                  * set the ioc_len to the proper value since INIT assumes
1855                  * size of data
1856                  */
1857                 ni_data->lic_cfg_hdr.ioc_len = buf_size;
1858                 ni_data->lic_idx = i;
1859
1860                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LOCAL_NI, ni_data);
1861                 if (rc != 0) {
1862                         l_errno = errno;
1863                         break;
1864                 }
1865
1866                 rc_net = LNET_NIDNET(ni_data->lic_nid);
1867
1868                 /* filter on provided data */
1869                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
1870                     net != rc_net)
1871                         continue;
1872
1873                 /* default rc to -1 in case we hit the goto */
1874                 rc = -1;
1875                 exist = true;
1876
1877                 stats = (struct lnet_ioctl_element_stats *)ni_data->lic_bulk;
1878                 lnd = (struct lnet_ioctl_config_lnd_tunables *)
1879                         (ni_data->lic_bulk + sizeof(*stats));
1880
1881                 if (rc_net != prev_net) {
1882                         prev_net = rc_net;
1883                         new_net = true;
1884                         net_num++;
1885                 }
1886
1887                 if (new_net) {
1888                         if (!cYAML_create_string(net_node, "net type",
1889                                                  libcfs_net2str(rc_net)))
1890                                 goto out;
1891
1892                         tmp = cYAML_create_seq(net_node, "local NI(s)");
1893                         if (tmp == NULL)
1894                                 goto out;
1895                         new_net = false;
1896                 }
1897
1898                 /* create the tree to be printed. */
1899                 item = cYAML_create_seq_item(tmp);
1900                 if (item == NULL)
1901                         goto out;
1902
1903                 if (first_seq == NULL)
1904                         first_seq = item;
1905
1906                 if (cYAML_create_string(item, "nid",
1907                                         libcfs_nid2str(ni_data->lic_nid)) == NULL)
1908                         goto out;
1909
1910                 if (cYAML_create_string(item,
1911                                         "status",
1912                                         (ni_data->lic_status ==
1913                                           LNET_NI_STATUS_UP) ?
1914                                             "up" : "down") == NULL)
1915                         goto out;
1916
1917                 /* don't add interfaces unless there is at least one
1918                  * interface */
1919                 if (strlen(ni_data->lic_ni_intf[0]) > 0) {
1920                         interfaces = cYAML_create_object(item, "interfaces");
1921                         if (interfaces == NULL)
1922                                 goto out;
1923
1924                         for (j = 0; j < LNET_INTERFACES_NUM; j++) {
1925                                 if (strlen(ni_data->lic_ni_intf[j]) > 0) {
1926                                         snprintf(str_buf,
1927                                                  sizeof(str_buf), "%d", j);
1928                                         if (cYAML_create_string(interfaces,
1929                                                 str_buf,
1930                                                 ni_data->lic_ni_intf[j]) ==
1931                                                         NULL)
1932                                                 goto out;
1933                                 }
1934                         }
1935                 }
1936
1937                 if (detail) {
1938                         char *limit;
1939                         int k;
1940
1941                         statistics = cYAML_create_object(item, "statistics");
1942                         if (statistics == NULL)
1943                                 goto out;
1944
1945                         if (cYAML_create_number(statistics, "send_count",
1946                                                 stats->iel_send_count)
1947                                                         == NULL)
1948                                 goto out;
1949
1950                         if (cYAML_create_number(statistics, "recv_count",
1951                                                 stats->iel_recv_count)
1952                                                         == NULL)
1953                                 goto out;
1954
1955                         if (cYAML_create_number(statistics, "drop_count",
1956                                                 stats->iel_drop_count)
1957                                                         == NULL)
1958                                 goto out;
1959
1960                         if (detail < 2)
1961                                 goto continue_without_msg_stats;
1962
1963                         LIBCFS_IOC_INIT_V2(msg_stats, im_hdr);
1964                         msg_stats.im_hdr.ioc_len = sizeof(msg_stats);
1965                         msg_stats.im_idx = i;
1966
1967                         rc = l_ioctl(LNET_DEV_ID,
1968                                      IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS,
1969                                      &msg_stats);
1970                         if (rc != 0) {
1971                                 l_errno = errno;
1972                                 goto continue_without_msg_stats;
1973                         }
1974
1975                         for (k = 0; k < 3; k++) {
1976                                 struct lnet_ioctl_comm_count *counts;
1977                                 struct cYAML *msg_statistics = NULL;
1978
1979                                 msg_statistics = cYAML_create_object(item,
1980                                                  (char *)gmsg_stat_names[k]);
1981                                 if (msg_statistics == NULL)
1982                                         goto out;
1983
1984                                 counts = get_counts(&msg_stats, k);
1985                                 if (counts == NULL)
1986                                         goto out;
1987
1988                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
1989                                                                counts))
1990                                         goto out;
1991                         }
1992
1993 continue_without_msg_stats:
1994                         tunables = cYAML_create_object(item, "tunables");
1995                         if (!tunables)
1996                                 goto out;
1997
1998                         rc = lustre_net_show_tunables(tunables, &lnd->lt_cmn);
1999                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2000                                 goto out;
2001
2002                         tunables = cYAML_create_object(item, "lnd tunables");
2003                         if (tunables == NULL)
2004                                 goto out;
2005
2006                         rc = lustre_ni_show_tunables(tunables, LNET_NETTYP(rc_net),
2007                                                      &lnd->lt_tun);
2008                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2009                                 goto out;
2010
2011                         if (cYAML_create_number(item, "tcp bonding",
2012                                                 ni_data->lic_tcp_bonding)
2013                                                         == NULL)
2014                                 goto out;
2015
2016                         if (cYAML_create_number(item, "dev cpt",
2017                                                 ni_data->lic_dev_cpt) == NULL)
2018                                 goto out;
2019
2020                         /* out put the CPTs in the format: "[x,x,x,...]" */
2021                         limit = str_buf + str_buf_len - 3;
2022                         pos += snprintf(pos, limit - pos, "\"[");
2023                         for (j = 0 ; ni_data->lic_ncpts >= 1 &&
2024                                 j < ni_data->lic_ncpts &&
2025                                 pos < limit; j++) {
2026                                 pos += snprintf(pos, limit - pos,
2027                                                 "%d", ni_data->lic_cpts[j]);
2028                                 if ((j + 1) < ni_data->lic_ncpts)
2029                                         pos += snprintf(pos, limit - pos, ",");
2030                         }
2031                         pos += snprintf(pos, 3, "]\"");
2032
2033                         if (ni_data->lic_ncpts >= 1 &&
2034                             cYAML_create_string(item, "CPT",
2035                                                 str_buf) == NULL)
2036                                 goto out;
2037                 }
2038         }
2039
2040         /* Print out the net information only if show_rc is not provided */
2041         if (show_rc == NULL)
2042                 cYAML_print_tree(root);
2043
2044         if (l_errno != ENOENT) {
2045                 snprintf(err_str,
2046                          sizeof(err_str),
2047                          "\"cannot get networks: %s\"",
2048                          strerror(l_errno));
2049                 rc = -l_errno;
2050                 goto out;
2051         } else
2052                 rc = LUSTRE_CFG_RC_NO_ERR;
2053
2054         snprintf(err_str, sizeof(err_str), "\"success\"");
2055 out:
2056         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2057                 cYAML_free_tree(root);
2058         } else if (show_rc != NULL && *show_rc != NULL) {
2059                 struct cYAML *show_node;
2060                 /* find the net node, if one doesn't exist
2061                  * then insert one.  Otherwise add to the one there
2062                  */
2063                 show_node = cYAML_get_object_item(*show_rc, "net");
2064                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2065                         cYAML_insert_child(show_node, first_seq);
2066                         free(net_node);
2067                         free(root);
2068                 } else if (show_node == NULL) {
2069                         cYAML_insert_sibling((*show_rc)->cy_child,
2070                                                 net_node);
2071                         free(root);
2072                 } else {
2073                         cYAML_free_tree(root);
2074                 }
2075         } else {
2076                 *show_rc = root;
2077         }
2078
2079         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
2080
2081         return rc;
2082 }
2083
2084 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
2085 {
2086         struct lnet_ioctl_config_data data;
2087         int rc = LUSTRE_CFG_RC_NO_ERR;
2088         char err_str[LNET_MAX_STR_LEN];
2089
2090         snprintf(err_str, sizeof(err_str), "\"success\"");
2091
2092         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2093         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
2094
2095         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
2096         if (rc != 0) {
2097                 rc = -errno;
2098                 snprintf(err_str,
2099                          sizeof(err_str),
2100                          "\"cannot %s routing %s\"",
2101                          (enable) ? "enable" : "disable", strerror(errno));
2102                 goto out;
2103         }
2104
2105 out:
2106         cYAML_build_error(rc, seq_no,
2107                          (enable) ? ADD_CMD : DEL_CMD,
2108                          "routing", err_str, err_rc);
2109
2110         return rc;
2111 }
2112
2113 int ioctl_set_value(__u32 val, int ioc, char *name,
2114                     int seq_no, struct cYAML **err_rc)
2115 {
2116         struct lnet_ioctl_set_value data;
2117         int rc = LUSTRE_CFG_RC_NO_ERR;
2118         char err_str[LNET_MAX_STR_LEN];
2119
2120         snprintf(err_str, sizeof(err_str), "\"success\"");
2121
2122         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2123         data.sv_value = val;
2124
2125         rc = l_ioctl(LNET_DEV_ID, ioc , &data);
2126         if (rc != 0) {
2127                 rc = -errno;
2128                 snprintf(err_str,
2129                          sizeof(err_str),
2130                          "\"cannot configure %s to %d: %s\"", name,
2131                          val, strerror(errno));
2132         }
2133
2134         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
2135
2136         return rc;
2137 }
2138
2139 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc)
2140 {
2141         int rc = LUSTRE_CFG_RC_NO_ERR;
2142         char err_str[LNET_MAX_STR_LEN];
2143         char val[LNET_MAX_STR_LEN];
2144
2145         snprintf(err_str, sizeof(err_str), "\"success\"");
2146
2147         snprintf(val, sizeof(val), "%d", max);
2148
2149         rc = write_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2150                               1, strlen(val) + 1);
2151         if (rc)
2152                 snprintf(err_str, sizeof(err_str),
2153                          "\"cannot configure max interfaces: %s\"",
2154                          strerror(errno));
2155
2156         cYAML_build_error(rc, seq_no, ADD_CMD, "max_interfaces", err_str, err_rc);
2157
2158         return rc;
2159 }
2160
2161 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc)
2162 {
2163         int rc = LUSTRE_CFG_RC_NO_ERR;
2164         char err_str[LNET_MAX_STR_LEN];
2165         char val[LNET_MAX_STR_LEN];
2166
2167         snprintf(err_str, sizeof(err_str), "\"success\"");
2168
2169         snprintf(val, sizeof(val), "%u", (enable) ? 0 : 1);
2170
2171         rc = write_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2172                               1, strlen(val) + 1);
2173         if (rc)
2174                 snprintf(err_str, sizeof(err_str),
2175                          "\"cannot configure discovery: %s\"",
2176                          strerror(errno));
2177
2178         cYAML_build_error(rc, seq_no, ADD_CMD, "discovery", err_str, err_rc);
2179
2180         return rc;
2181
2182 }
2183
2184 int lustre_lnet_config_numa_range(int range, int seq_no, struct cYAML **err_rc)
2185 {
2186         return ioctl_set_value(range, IOC_LIBCFS_SET_NUMA_RANGE,
2187                                "numa_range", seq_no, err_rc);
2188 }
2189
2190 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
2191                                struct cYAML **err_rc)
2192 {
2193         struct lnet_ioctl_config_data data;
2194         int rc = LUSTRE_CFG_RC_NO_ERR;
2195         char err_str[LNET_MAX_STR_LEN];
2196
2197         snprintf(err_str, sizeof(err_str), "\"success\"");
2198
2199         /* -1 indicates to ignore changes to this field */
2200         if (tiny < -1 || small < -1 || large < -1) {
2201                 snprintf(err_str,
2202                          sizeof(err_str),
2203                          "\"tiny, small and large must be >= 0\"");
2204                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
2205                 goto out;
2206         }
2207
2208         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2209         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
2210         data.cfg_config_u.cfg_buffers.buf_small = small;
2211         data.cfg_config_u.cfg_buffers.buf_large = large;
2212
2213         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
2214         if (rc != 0) {
2215                 rc = -errno;
2216                 snprintf(err_str,
2217                          sizeof(err_str),
2218                          "\"cannot configure buffers: %s\"", strerror(errno));
2219                 goto out;
2220         }
2221
2222 out:
2223         cYAML_build_error(rc, seq_no, ADD_CMD, "buf", err_str, err_rc);
2224
2225         return rc;
2226 }
2227
2228 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
2229                              struct cYAML **err_rc)
2230 {
2231         struct lnet_ioctl_config_data *data;
2232         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
2233         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2234         int l_errno = 0;
2235         char *buf;
2236         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
2237         int buf_count[LNET_NRBPOOLS] = {0};
2238         struct cYAML *root = NULL, *pools_node = NULL,
2239                      *type_node = NULL, *item = NULL, *cpt = NULL,
2240                      *first_seq = NULL, *buffers = NULL;
2241         int i, j;
2242         char err_str[LNET_MAX_STR_LEN];
2243         char node_name[LNET_MAX_STR_LEN];
2244         bool exist = false;
2245
2246         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2247
2248         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
2249         if (buf == NULL)
2250                 goto out;
2251
2252         data = (struct lnet_ioctl_config_data *)buf;
2253
2254         root = cYAML_create_object(NULL, NULL);
2255         if (root == NULL)
2256                 goto out;
2257
2258         pools_node = cYAML_create_seq(root, "routing");
2259         if (pools_node == NULL)
2260                 goto out;
2261
2262         for (i = 0;; i++) {
2263                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
2264                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
2265                                         sizeof(struct lnet_ioctl_pool_cfg);
2266                 data->cfg_count = i;
2267
2268                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
2269                 if (rc != 0) {
2270                         l_errno = errno;
2271                         break;
2272                 }
2273
2274                 exist = true;
2275
2276                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
2277
2278                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
2279                 item = cYAML_create_seq_item(pools_node);
2280                 if (item == NULL)
2281                         goto out;
2282
2283                 if (first_seq == NULL)
2284                         first_seq = item;
2285
2286                 cpt = cYAML_create_object(item, node_name);
2287                 if (cpt == NULL)
2288                         goto out;
2289
2290                 /* create the tree  and print */
2291                 for (j = 0; j < LNET_NRBPOOLS; j++) {
2292                         type_node = cYAML_create_object(cpt, pools[j]);
2293                         if (type_node == NULL)
2294                                 goto out;
2295                         if (cYAML_create_number(type_node, "npages",
2296                                                 pool_cfg->pl_pools[j].pl_npages)
2297                             == NULL)
2298                                 goto out;
2299                         if (cYAML_create_number(type_node, "nbuffers",
2300                                                 pool_cfg->pl_pools[j].
2301                                                   pl_nbuffers) == NULL)
2302                                 goto out;
2303                         if (cYAML_create_number(type_node, "credits",
2304                                                 pool_cfg->pl_pools[j].
2305                                                    pl_credits) == NULL)
2306                                 goto out;
2307                         if (cYAML_create_number(type_node, "mincredits",
2308                                                 pool_cfg->pl_pools[j].
2309                                                    pl_mincredits) == NULL)
2310                                 goto out;
2311                         /* keep track of the total count for each of the
2312                          * tiny, small and large buffers */
2313                         buf_count[j] += pool_cfg->pl_pools[j].pl_nbuffers;
2314                 }
2315         }
2316
2317         if (pool_cfg != NULL) {
2318                 item = cYAML_create_seq_item(pools_node);
2319                 if (item == NULL)
2320                         goto out;
2321
2322                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
2323                     NULL)
2324                         goto out;
2325         }
2326
2327         /* create a buffers entry in the show. This is necessary so that
2328          * if the YAML output is used to configure a node, the buffer
2329          * configuration takes hold */
2330         buffers = cYAML_create_object(root, "buffers");
2331         if (buffers == NULL)
2332                 goto out;
2333
2334         for (i = 0; i < LNET_NRBPOOLS; i++) {
2335                 if (cYAML_create_number(buffers, pools[i], buf_count[i]) == NULL)
2336                         goto out;
2337         }
2338
2339         if (show_rc == NULL)
2340                 cYAML_print_tree(root);
2341
2342         if (l_errno != ENOENT) {
2343                 snprintf(err_str,
2344                          sizeof(err_str),
2345                          "\"cannot get routing information: %s\"",
2346                          strerror(l_errno));
2347                 rc = -l_errno;
2348                 goto out;
2349         } else
2350                 rc = LUSTRE_CFG_RC_NO_ERR;
2351
2352         snprintf(err_str, sizeof(err_str), "\"success\"");
2353         rc = LUSTRE_CFG_RC_NO_ERR;
2354
2355 out:
2356         free(buf);
2357         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2358                 cYAML_free_tree(root);
2359         } else if (show_rc != NULL && *show_rc != NULL) {
2360                 struct cYAML *routing_node;
2361                 /* there should exist only one routing block and one
2362                  * buffers block. If there already exists a previous one
2363                  * then don't add another */
2364                 routing_node = cYAML_get_object_item(*show_rc, "routing");
2365                 if (routing_node == NULL) {
2366                         cYAML_insert_sibling((*show_rc)->cy_child,
2367                                                 root->cy_child);
2368                         free(root);
2369                 } else {
2370                         cYAML_free_tree(root);
2371                 }
2372         } else {
2373                 *show_rc = root;
2374         }
2375
2376         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
2377
2378         return rc;
2379 }
2380
2381 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
2382                           struct cYAML **show_rc, struct cYAML **err_rc)
2383 {
2384         /*
2385          * TODO: This function is changing in a future patch to accommodate
2386          * PEER_LIST and proper filtering on any nid of the peer
2387          */
2388         struct lnet_ioctl_peer_cfg peer_info;
2389         struct lnet_peer_ni_credit_info *lpni_cri;
2390         struct lnet_ioctl_element_stats *lpni_stats;
2391         struct lnet_ioctl_element_msg_stats *msg_stats;
2392         lnet_nid_t *nidp;
2393         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2394         int i, j, k;
2395         int l_errno = 0;
2396         __u32 count;
2397         __u32 size;
2398         struct cYAML *root = NULL, *peer = NULL, *peer_ni = NULL,
2399                      *first_seq = NULL, *peer_root = NULL, *tmp = NULL,
2400                      *msg_statistics = NULL, *statistics = NULL;
2401         char err_str[LNET_MAX_STR_LEN];
2402         lnet_process_id_t *list = NULL;
2403         void *data = NULL;
2404         void *lpni_data;
2405
2406         snprintf(err_str, sizeof(err_str),
2407                  "\"out of memory\"");
2408
2409         /* create struct cYAML root object */
2410         root = cYAML_create_object(NULL, NULL);
2411         if (root == NULL)
2412                 goto out;
2413
2414         peer_root = cYAML_create_seq(root, "peer");
2415         if (peer_root == NULL)
2416                 goto out;
2417
2418         count = 1000;
2419         size = count * sizeof(lnet_process_id_t);
2420         list = malloc(size);
2421         if (list == NULL) {
2422                 l_errno = ENOMEM;
2423                 goto out;
2424         }
2425         if (knid != NULL) {
2426                 list[0].nid = libcfs_str2nid(knid);
2427                 count = 1;
2428         } else {
2429                 for (;;) {
2430                         memset(&peer_info, 0, sizeof(peer_info));
2431                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2432                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2433                         peer_info.prcfg_size = size;
2434                         peer_info.prcfg_bulk = list;
2435
2436                         l_errno = 0;
2437                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST,
2438                                      &peer_info);
2439                         count = peer_info.prcfg_count;
2440                         if (rc == 0)
2441                                 break;
2442                         l_errno = errno;
2443                         if (l_errno != E2BIG) {
2444                                 snprintf(err_str,
2445                                         sizeof(err_str),
2446                                         "\"cannot get peer list: %s\"",
2447                                         strerror(l_errno));
2448                                 rc = -l_errno;
2449                                 goto out;
2450                         }
2451                         free(list);
2452                         size = peer_info.prcfg_size;
2453                         list = malloc(size);
2454                         if (list == NULL) {
2455                                 l_errno = ENOMEM;
2456                                 goto out;
2457                         }
2458                 }
2459         }
2460
2461         size = 4096;
2462         data = malloc(size);
2463         if (data == NULL) {
2464                 l_errno = ENOMEM;
2465                 goto out;
2466         }
2467         for (i = 0; i < count; i++) {
2468                 for (;;) {
2469                         memset(&peer_info, 0, sizeof(peer_info));
2470                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2471                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2472                         peer_info.prcfg_prim_nid = list[i].nid;
2473                         peer_info.prcfg_size = size;
2474                         peer_info.prcfg_bulk = data;
2475
2476                         l_errno = 0;
2477                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_NI,
2478                                      &peer_info);
2479                         if (rc == 0)
2480                                 break;
2481                         l_errno = errno;
2482                         if (l_errno != E2BIG) {
2483                                 snprintf(err_str,
2484                                         sizeof(err_str),
2485                                         "\"cannot get peer information: %s\"",
2486                                         strerror(l_errno));
2487                                 rc = -l_errno;
2488                                 goto out;
2489                         }
2490                         free(data);
2491                         size = peer_info.prcfg_size;
2492                         data = malloc(size);
2493                         if (data == NULL) {
2494                                 l_errno = ENOMEM;
2495                                 goto out;
2496                         }
2497                 }
2498
2499                 peer = cYAML_create_seq_item(peer_root);
2500                 if (peer == NULL)
2501                         goto out;
2502
2503                 if (first_seq == NULL)
2504                         first_seq = peer;
2505
2506                 lnet_nid_t pnid = peer_info.prcfg_prim_nid;
2507                 if (cYAML_create_string(peer, "primary nid",
2508                                         libcfs_nid2str(pnid))
2509                     == NULL)
2510                         goto out;
2511                 if (cYAML_create_string(peer, "Multi-Rail",
2512                                         peer_info.prcfg_mr ? "True" : "False")
2513                     == NULL)
2514                         goto out;
2515                 /*
2516                  * print out the state of the peer only if details are
2517                  * requested
2518                  */
2519                 if (detail >= 3) {
2520                         if (cYAML_create_number(peer, "peer state",
2521                                                 peer_info.prcfg_state)
2522                                 == NULL)
2523                                 goto out;
2524                 }
2525
2526                 tmp = cYAML_create_seq(peer, "peer ni");
2527                 if (tmp == NULL)
2528                         goto out;
2529
2530                 lpni_data = data;
2531                 for (j = 0; j < peer_info.prcfg_count; j++) {
2532                         nidp = lpni_data;
2533                         lpni_cri = (void*)nidp + sizeof(nidp);
2534                         lpni_stats = (void *)lpni_cri + sizeof(*lpni_cri);
2535                         msg_stats = (void *)lpni_stats + sizeof(*lpni_stats);
2536                         lpni_data = (void *)msg_stats + sizeof(*msg_stats);
2537
2538                         peer_ni = cYAML_create_seq_item(tmp);
2539                         if (peer_ni == NULL)
2540                                 goto out;
2541
2542                         if (cYAML_create_string(peer_ni, "nid",
2543                                                 libcfs_nid2str(*nidp))
2544                             == NULL)
2545                                 goto out;
2546
2547                         if (cYAML_create_string(peer_ni, "state",
2548                                                 lpni_cri->cr_aliveness)
2549                             == NULL)
2550                                 goto out;
2551
2552                         if (!detail)
2553                                 continue;
2554
2555                         if (cYAML_create_number(peer_ni, "max_ni_tx_credits",
2556                                                 lpni_cri->cr_ni_peer_tx_credits)
2557                             == NULL)
2558                                 goto out;
2559
2560                         if (cYAML_create_number(peer_ni, "available_tx_credits",
2561                                                 lpni_cri->cr_peer_tx_credits)
2562                             == NULL)
2563                                 goto out;
2564
2565                         if (cYAML_create_number(peer_ni, "min_tx_credits",
2566                                                 lpni_cri->cr_peer_min_tx_credits)
2567                             == NULL)
2568                                 goto out;
2569
2570                         if (cYAML_create_number(peer_ni, "tx_q_num_of_buf",
2571                                                 lpni_cri->cr_peer_tx_qnob)
2572                             == NULL)
2573                                 goto out;
2574
2575                         if (cYAML_create_number(peer_ni, "available_rtr_credits",
2576                                                 lpni_cri->cr_peer_rtr_credits)
2577                             == NULL)
2578                                 goto out;
2579
2580                         if (cYAML_create_number(peer_ni, "min_rtr_credits",
2581                                                 lpni_cri->cr_peer_min_rtr_credits)
2582                             == NULL)
2583                                 goto out;
2584
2585                         if (cYAML_create_number(peer_ni, "refcount",
2586                                                 lpni_cri->cr_refcount) == NULL)
2587                                 goto out;
2588
2589                         statistics = cYAML_create_object(peer_ni, "statistics");
2590                         if (statistics == NULL)
2591                                 goto out;
2592
2593                         if (cYAML_create_number(statistics, "send_count",
2594                                                 lpni_stats->iel_send_count)
2595                             == NULL)
2596                                 goto out;
2597
2598                         if (cYAML_create_number(statistics, "recv_count",
2599                                                 lpni_stats->iel_recv_count)
2600                             == NULL)
2601                                 goto out;
2602
2603                         if (cYAML_create_number(statistics, "drop_count",
2604                                                 lpni_stats->iel_drop_count)
2605                             == NULL)
2606                                 goto out;
2607
2608                         if (detail < 2)
2609                                 continue;
2610
2611                         for (k = 0; k < 3; k++) {
2612                                 struct lnet_ioctl_comm_count *counts;
2613
2614                                 msg_statistics = cYAML_create_object(peer_ni,
2615                                                  (char *) gmsg_stat_names[k]);
2616                                 if (msg_statistics == NULL)
2617                                         goto out;
2618
2619                                 counts = get_counts(msg_stats, k);
2620                                 if (counts == NULL)
2621                                         goto out;
2622
2623                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
2624                                                                counts))
2625                                         goto out;
2626                         }
2627
2628                 }
2629         }
2630
2631         /* print output iff show_rc is not provided */
2632         if (show_rc == NULL)
2633                 cYAML_print_tree(root);
2634
2635         snprintf(err_str, sizeof(err_str), "\"success\"");
2636         rc = LUSTRE_CFG_RC_NO_ERR;
2637
2638 out:
2639         free(list);
2640         free(data);
2641         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
2642                 cYAML_free_tree(root);
2643         } else if (show_rc != NULL && *show_rc != NULL) {
2644                 struct cYAML *show_node;
2645                 /* find the peer node, if one doesn't exist then
2646                  * insert one.  Otherwise add to the one there
2647                  */
2648                 show_node = cYAML_get_object_item(*show_rc,
2649                                                   "peer");
2650                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2651                         cYAML_insert_child(show_node, first_seq);
2652                         free(peer_root);
2653                         free(root);
2654                 } else if (show_node == NULL) {
2655                         cYAML_insert_sibling((*show_rc)->cy_child,
2656                                              peer_root);
2657                         free(root);
2658                 } else {
2659                         cYAML_free_tree(root);
2660                 }
2661         } else {
2662                 *show_rc = root;
2663         }
2664
2665         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
2666                           err_rc);
2667
2668         return rc;
2669 }
2670
2671 int lustre_lnet_list_peer(int seq_no,
2672                           struct cYAML **show_rc, struct cYAML **err_rc)
2673 {
2674         struct lnet_ioctl_peer_cfg peer_info;
2675         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2676         __u32 count;
2677         __u32 size;
2678         int i = 0;
2679         int l_errno = 0;
2680         struct cYAML *root = NULL, *list_root = NULL, *first_seq = NULL;
2681         char err_str[LNET_MAX_STR_LEN];
2682         lnet_process_id_t *list = NULL;
2683
2684         snprintf(err_str, sizeof(err_str),
2685                  "\"out of memory\"");
2686
2687         memset(&peer_info, 0, sizeof(peer_info));
2688
2689         /* create struct cYAML root object */
2690         root = cYAML_create_object(NULL, NULL);
2691         if (root == NULL)
2692                 goto out;
2693
2694         list_root = cYAML_create_seq(root, "peer list");
2695         if (list_root == NULL)
2696                 goto out;
2697
2698         count = 1000;
2699         size = count * sizeof(lnet_process_id_t);
2700         list = malloc(size);
2701         if (list == NULL) {
2702                 l_errno = ENOMEM;
2703                 goto out;
2704         }
2705         for (;;) {
2706                 LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2707                 peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2708                 peer_info.prcfg_size = size;
2709                 peer_info.prcfg_bulk = list;
2710
2711                 l_errno = 0;
2712                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST, &peer_info);
2713                 count = peer_info.prcfg_count;
2714                 if (rc == 0)
2715                         break;
2716                 l_errno = errno;
2717                 if (l_errno != E2BIG) {
2718                         snprintf(err_str,
2719                                 sizeof(err_str),
2720                                 "\"cannot get peer list: %s\"",
2721                                 strerror(l_errno));
2722                         rc = -l_errno;
2723                         goto out;
2724                 }
2725                 free(list);
2726                 size = peer_info.prcfg_size;
2727                 list = malloc(size);
2728                 if (list == NULL) {
2729                         l_errno = ENOMEM;
2730                         goto out;
2731                 }
2732         }
2733
2734         /* count is now the actual number of ids in the list. */
2735         for (i = 0; i < count; i++) {
2736                 if (cYAML_create_string(list_root, "nid",
2737                                         libcfs_nid2str(list[i].nid))
2738                     == NULL)
2739                         goto out;
2740         }
2741
2742         /* print output iff show_rc is not provided */
2743         if (show_rc == NULL)
2744                 cYAML_print_tree(root);
2745
2746         snprintf(err_str, sizeof(err_str), "\"success\"");
2747         rc = LUSTRE_CFG_RC_NO_ERR;
2748
2749 out:
2750         if (list != NULL)
2751                 free(list);
2752         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
2753                 cYAML_free_tree(root);
2754         } else if (show_rc != NULL && *show_rc != NULL) {
2755                 struct cYAML *show_node;
2756                 /* find the peer node, if one doesn't exist then
2757                  * insert one.  Otherwise add to the one there
2758                  */
2759                 show_node = cYAML_get_object_item(*show_rc,
2760                                                   "peer");
2761                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2762                         cYAML_insert_child(show_node, first_seq);
2763                         free(list_root);
2764                         free(root);
2765                 } else if (show_node == NULL) {
2766                         cYAML_insert_sibling((*show_rc)->cy_child,
2767                                              list_root);
2768                         free(root);
2769                 } else {
2770                         cYAML_free_tree(root);
2771                 }
2772         } else {
2773                 *show_rc = root;
2774         }
2775
2776         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
2777                           err_rc);
2778
2779         return rc;
2780 }
2781
2782 static void add_to_global(struct cYAML *show_rc, struct cYAML *node,
2783                           struct cYAML *root)
2784 {
2785         struct cYAML *show_node;
2786
2787         show_node = cYAML_get_object_item(show_rc, "global");
2788         if (show_node != NULL)
2789                 cYAML_insert_sibling(show_node->cy_child,
2790                                      node->cy_child);
2791         else
2792                 cYAML_insert_sibling(show_rc->cy_child,
2793                                      node);
2794         free(root);
2795 }
2796
2797 static int build_global_yaml_entry(char *err_str, int err_len, int seq_no,
2798                                    char *name, __u32 value,
2799                                    struct cYAML **show_rc,
2800                                    struct cYAML **err_rc, int err)
2801 {
2802         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2803         struct cYAML *root = NULL, *global = NULL;
2804
2805         if (err) {
2806                 rc = err;
2807                 goto out;
2808         }
2809
2810         root = cYAML_create_object(NULL, NULL);
2811         if (root == NULL)
2812                 goto out;
2813
2814         global = cYAML_create_object(root, "global");
2815         if (global == NULL)
2816                 goto out;
2817
2818         if (cYAML_create_number(global, name,
2819                                 value) == NULL)
2820                 goto out;
2821
2822         if (show_rc == NULL)
2823                 cYAML_print_tree(root);
2824
2825         snprintf(err_str, err_len, "\"success\"");
2826
2827         rc = LUSTRE_CFG_RC_NO_ERR;
2828
2829 out:
2830         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
2831                 cYAML_free_tree(root);
2832         } else if (show_rc != NULL && *show_rc != NULL) {
2833                 add_to_global(*show_rc, global, root);
2834         } else {
2835                 *show_rc = root;
2836         }
2837
2838         cYAML_build_error(rc, seq_no, SHOW_CMD, "global", err_str, err_rc);
2839
2840         return rc;
2841 }
2842
2843 static int ioctl_show_global_values(int ioc, int seq_no, char *name,
2844                                     struct cYAML **show_rc,
2845                                     struct cYAML **err_rc)
2846 {
2847         struct lnet_ioctl_set_value data;
2848         int rc;
2849         int l_errno = 0;
2850         char err_str[LNET_MAX_STR_LEN];
2851
2852         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2853
2854         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2855
2856         rc = l_ioctl(LNET_DEV_ID, ioc, &data);
2857         if (rc != 0) {
2858                 l_errno = -errno;
2859                 snprintf(err_str,
2860                          sizeof(err_str),
2861                          "\"cannot get %s: %s\"",
2862                          name, strerror(l_errno));
2863         }
2864
2865         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no, name,
2866                                        data.sv_value, show_rc, err_rc, l_errno);
2867 }
2868
2869 int lustre_lnet_show_max_intf(int seq_no, struct cYAML **show_rc,
2870                               struct cYAML **err_rc)
2871 {
2872         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2873         char val[LNET_MAX_STR_LEN];
2874         int max_intf = -1, l_errno = 0;
2875         char err_str[LNET_MAX_STR_LEN];
2876
2877         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2878
2879         rc = read_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2880                              1, sizeof(val));
2881         if (rc) {
2882                 l_errno = -errno;
2883                 snprintf(err_str, sizeof(err_str),
2884                          "\"cannot get max interfaces: %d\"", rc);
2885         } else {
2886                 max_intf = atoi(val);
2887         }
2888
2889         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
2890                                        "max_intf", max_intf, show_rc,
2891                                        err_rc, l_errno);
2892 }
2893
2894 int lustre_lnet_show_discovery(int seq_no, struct cYAML **show_rc,
2895                                struct cYAML **err_rc)
2896 {
2897         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2898         char val[LNET_MAX_STR_LEN];
2899         int discovery = -1, l_errno = 0;
2900         char err_str[LNET_MAX_STR_LEN];
2901
2902         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2903
2904         rc = read_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2905                              1, sizeof(val));
2906         if (rc) {
2907                 l_errno = -errno;
2908                 snprintf(err_str, sizeof(err_str),
2909                          "\"cannot get discovery setting: %d\"", rc);
2910         } else {
2911                 /*
2912                  * The kernel stores a discovery disabled value. User space
2913                  * shows whether discovery is enabled. So the value must be
2914                  * inverted.
2915                  */
2916                 discovery = !atoi(val);
2917         }
2918
2919         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
2920                                        "discovery", discovery, show_rc,
2921                                        err_rc, l_errno);
2922 }
2923
2924 int lustre_lnet_show_numa_range(int seq_no, struct cYAML **show_rc,
2925                                 struct cYAML **err_rc)
2926 {
2927         return ioctl_show_global_values(IOC_LIBCFS_GET_NUMA_RANGE, seq_no,
2928                                         "numa_range", show_rc, err_rc);
2929 }
2930
2931 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
2932                            struct cYAML **err_rc)
2933 {
2934         struct lnet_ioctl_lnet_stats data;
2935         int rc;
2936         int l_errno;
2937         char err_str[LNET_MAX_STR_LEN];
2938         struct cYAML *root = NULL, *stats = NULL;
2939
2940         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2941
2942         LIBCFS_IOC_INIT_V2(data, st_hdr);
2943
2944         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LNET_STATS, &data);
2945         if (rc != 0) {
2946                 l_errno = errno;
2947                 snprintf(err_str,
2948                          sizeof(err_str),
2949                          "\"cannot get lnet statistics: %s\"",
2950                          strerror(l_errno));
2951                 rc = -l_errno;
2952                 goto out;
2953         }
2954
2955         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2956
2957         root = cYAML_create_object(NULL, NULL);
2958         if (root == NULL)
2959                 goto out;
2960
2961         stats = cYAML_create_object(root, "statistics");
2962         if (stats == NULL)
2963                 goto out;
2964
2965         if (cYAML_create_number(stats, "msgs_alloc",
2966                                 data.st_cntrs.msgs_alloc) == NULL)
2967                 goto out;
2968
2969         if (cYAML_create_number(stats, "msgs_max",
2970                                 data.st_cntrs.msgs_max) == NULL)
2971                 goto out;
2972
2973         if (cYAML_create_number(stats, "errors",
2974                                 data.st_cntrs.errors) == NULL)
2975                 goto out;
2976
2977         if (cYAML_create_number(stats, "send_count",
2978                                 data.st_cntrs.send_count) == NULL)
2979                 goto out;
2980
2981         if (cYAML_create_number(stats, "recv_count",
2982                                 data.st_cntrs.recv_count) == NULL)
2983                 goto out;
2984
2985         if (cYAML_create_number(stats, "route_count",
2986                                 data.st_cntrs.route_count) == NULL)
2987                 goto out;
2988
2989         if (cYAML_create_number(stats, "drop_count",
2990                                 data.st_cntrs.drop_count) == NULL)
2991                 goto out;
2992
2993         if (cYAML_create_number(stats, "send_length",
2994                                 data.st_cntrs.send_length) == NULL)
2995                 goto out;
2996
2997         if (cYAML_create_number(stats, "recv_length",
2998                                 data.st_cntrs.recv_length) == NULL)
2999                 goto out;
3000
3001         if (cYAML_create_number(stats, "route_length",
3002                                 data.st_cntrs.route_length) == NULL)
3003                 goto out;
3004
3005         if (cYAML_create_number(stats, "drop_length",
3006                                 data.st_cntrs.drop_length) == NULL)
3007                 goto out;
3008
3009         if (show_rc == NULL)
3010                 cYAML_print_tree(root);
3011
3012         snprintf(err_str, sizeof(err_str), "\"success\"");
3013         rc = LUSTRE_CFG_RC_NO_ERR;
3014 out:
3015         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3016                 cYAML_free_tree(root);
3017         } else if (show_rc != NULL && *show_rc != NULL) {
3018                 cYAML_insert_sibling((*show_rc)->cy_child,
3019                                         root->cy_child);
3020                 free(root);
3021         } else {
3022                 *show_rc = root;
3023         }
3024
3025         cYAML_build_error(rc, seq_no, SHOW_CMD, "statistics", err_str, err_rc);
3026
3027         return rc;
3028 }
3029
3030 typedef int (*cmd_handler_t)(struct cYAML *tree,
3031                              struct cYAML **show_rc,
3032                              struct cYAML **err_rc);
3033
3034 static int handle_yaml_config_route(struct cYAML *tree, struct cYAML **show_rc,
3035                                     struct cYAML **err_rc)
3036 {
3037         struct cYAML *net, *gw, *hop, *prio, *seq_no;
3038
3039         net = cYAML_get_object_item(tree, "net");
3040         gw = cYAML_get_object_item(tree, "gateway");
3041         hop = cYAML_get_object_item(tree, "hop");
3042         prio = cYAML_get_object_item(tree, "priority");
3043         seq_no = cYAML_get_object_item(tree, "seq_no");
3044
3045         return lustre_lnet_config_route((net) ? net->cy_valuestring : NULL,
3046                                         (gw) ? gw->cy_valuestring : NULL,
3047                                         (hop) ? hop->cy_valueint : -1,
3048                                         (prio) ? prio->cy_valueint : -1,
3049                                         (seq_no) ? seq_no->cy_valueint : -1,
3050                                         err_rc);
3051 }
3052
3053 static void yaml_free_string_array(char **array, int num)
3054 {
3055         int i;
3056         char **sub_array = array;
3057
3058         for (i = 0; i < num; i++) {
3059                 if (*sub_array != NULL)
3060                         free(*sub_array);
3061                 sub_array++;
3062         }
3063         if (array)
3064                 free(array);
3065 }
3066
3067 /*
3068  *    interfaces:
3069  *        0: <intf_name>['['<expr>']']
3070  *        1: <intf_name>['['<expr>']']
3071  */
3072 static int yaml_copy_intf_info(struct cYAML *intf_tree,
3073                                struct lnet_dlc_network_descr *nw_descr)
3074 {
3075         struct cYAML *child = NULL;
3076         int intf_num = 0, rc = LUSTRE_CFG_RC_NO_ERR;
3077         struct lnet_dlc_intf_descr *intf_descr, *tmp;
3078
3079         if (intf_tree == NULL || nw_descr == NULL)
3080                 return LUSTRE_CFG_RC_BAD_PARAM;
3081
3082         /* now grab all the interfaces and their cpts */
3083         child = intf_tree->cy_child;
3084         while (child != NULL) {
3085                 if (child->cy_valuestring == NULL) {
3086                         child = child->cy_next;
3087                         continue;
3088                 }
3089
3090                 if (strlen(child->cy_valuestring) >= LNET_MAX_STR_LEN)
3091                         goto failed;
3092
3093                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist,
3094                                                 child->cy_valuestring,
3095                                                 strlen(child->cy_valuestring));
3096                 if (rc != LUSTRE_CFG_RC_NO_ERR)
3097                         goto failed;
3098
3099                 intf_num++;
3100                 child = child->cy_next;
3101         }
3102
3103         if (intf_num == 0)
3104                 return LUSTRE_CFG_RC_MISSING_PARAM;
3105
3106         return intf_num;
3107
3108 failed:
3109         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
3110                                  intf_on_network) {
3111                 list_del(&intf_descr->intf_on_network);
3112                 free_intf_descr(intf_descr);
3113         }
3114
3115         return rc;
3116 }
3117
3118 static bool
3119 yaml_extract_cmn_tunables(struct cYAML *tree,
3120                           struct lnet_ioctl_config_lnd_cmn_tunables *tunables,
3121                           struct cfs_expr_list **global_cpts)
3122 {
3123         struct cYAML *tun, *item, *smp;
3124         int rc;
3125
3126         tun = cYAML_get_object_item(tree, "tunables");
3127         if (tun != NULL) {
3128                 item = cYAML_get_object_item(tun, "peer_timeout");
3129                 if (item != NULL)
3130                         tunables->lct_peer_timeout = item->cy_valueint;
3131                 item = cYAML_get_object_item(tun, "peer_credits");
3132                 if (item != NULL)
3133                         tunables->lct_peer_tx_credits = item->cy_valueint;
3134                 item = cYAML_get_object_item(tun, "peer_buffer_credits");
3135                 if (item != NULL)
3136                         tunables->lct_peer_rtr_credits = item->cy_valueint;
3137                 item = cYAML_get_object_item(tun, "credits");
3138                 if (item != NULL)
3139                         tunables->lct_max_tx_credits = item->cy_valueint;
3140                 smp = cYAML_get_object_item(tun, "CPT");
3141                 if (smp != NULL) {
3142                         rc = cfs_expr_list_parse(smp->cy_valuestring,
3143                                                  strlen(smp->cy_valuestring),
3144                                                  0, UINT_MAX, global_cpts);
3145                         if (rc != 0)
3146                                 *global_cpts = NULL;
3147                 }
3148
3149                 return true;
3150         }
3151
3152         return false;
3153 }
3154
3155 static bool
3156 yaml_extract_tunables(struct cYAML *tree,
3157                       struct lnet_ioctl_config_lnd_tunables *tunables,
3158                       struct cfs_expr_list **global_cpts,
3159                       __u32 net_type)
3160 {
3161         bool rc;
3162
3163         rc = yaml_extract_cmn_tunables(tree, &tunables->lt_cmn,
3164                                        global_cpts);
3165
3166         if (!rc)
3167                 return rc;
3168
3169         lustre_yaml_extract_lnd_tunables(tree, net_type,
3170                                          &tunables->lt_tun);
3171
3172         return rc;
3173 }
3174
3175 /*
3176  * net:
3177  *    - net type: <net>[<NUM>]
3178   *      local NI(s):
3179  *        - nid: <ip>@<net>[<NUM>]
3180  *          status: up
3181  *          interfaces:
3182  *               0: <intf_name>['['<expr>']']
3183  *               1: <intf_name>['['<expr>']']
3184  *        tunables:
3185  *               peer_timeout: <NUM>
3186  *               peer_credits: <NUM>
3187  *               peer_buffer_credits: <NUM>
3188  *               credits: <NUM>
3189 *         lnd tunables:
3190  *               peercredits_hiw: <NUM>
3191  *               map_on_demand: <NUM>
3192  *               concurrent_sends: <NUM>
3193  *               fmr_pool_size: <NUM>
3194  *               fmr_flush_trigger: <NUM>
3195  *               fmr_cache: <NUM>
3196  *
3197  * At least one interface is required. If no interfaces are provided the
3198  * network interface can not be configured.
3199  */
3200 static int handle_yaml_config_ni(struct cYAML *tree, struct cYAML **show_rc,
3201                                  struct cYAML **err_rc)
3202 {
3203         struct cYAML *net, *intf, *seq_no, *ip2net = NULL, *local_nis = NULL,
3204                      *item = NULL;
3205         int num_entries = 0, rc;
3206         struct lnet_dlc_network_descr nw_descr;
3207         struct cfs_expr_list *global_cpts = NULL;
3208         struct lnet_ioctl_config_lnd_tunables tunables;
3209         bool found = false;
3210
3211         memset(&tunables, 0, sizeof(tunables));
3212
3213         INIT_LIST_HEAD(&nw_descr.network_on_rule);
3214         INIT_LIST_HEAD(&nw_descr.nw_intflist);
3215
3216         ip2net = cYAML_get_object_item(tree, "ip2net");
3217         net = cYAML_get_object_item(tree, "net type");
3218         if (net)
3219                 nw_descr.nw_id = libcfs_str2net(net->cy_valuestring);
3220         else
3221                 nw_descr.nw_id = LOLND;
3222
3223         /*
3224          * if neither net nor ip2nets are present, then we can not
3225          * configure the network.
3226          */
3227         if (!net && !ip2net)
3228                 return LUSTRE_CFG_RC_MISSING_PARAM;
3229
3230         local_nis = cYAML_get_object_item(tree, "local NI(s)");
3231         if (local_nis == NULL)
3232                 return LUSTRE_CFG_RC_MISSING_PARAM;
3233
3234         if (!cYAML_is_sequence(local_nis))
3235                 return LUSTRE_CFG_RC_BAD_PARAM;
3236
3237         while (cYAML_get_next_seq_item(local_nis, &item) != NULL) {
3238                 intf = cYAML_get_object_item(item, "interfaces");
3239                 if (intf == NULL)
3240                         continue;
3241                 num_entries = yaml_copy_intf_info(intf, &nw_descr);
3242                 if (num_entries <= 0) {
3243                         cYAML_build_error(num_entries, -1, "ni", "add",
3244                                         "bad interface list",
3245                                         err_rc);
3246                         return LUSTRE_CFG_RC_BAD_PARAM;
3247                 }
3248         }
3249
3250         found = yaml_extract_tunables(tree, &tunables, &global_cpts,
3251                                       LNET_NETTYP(nw_descr.nw_id));
3252         seq_no = cYAML_get_object_item(tree, "seq_no");
3253
3254         rc = lustre_lnet_config_ni(&nw_descr,
3255                                    global_cpts,
3256                                    (ip2net) ? ip2net->cy_valuestring : NULL,
3257                                    (found) ? &tunables: NULL,
3258                                    (seq_no) ? seq_no->cy_valueint : -1,
3259                                    err_rc);
3260
3261         if (global_cpts != NULL)
3262                 cfs_expr_list_free(global_cpts);
3263
3264         return rc;
3265 }
3266
3267 /*
3268  * ip2nets:
3269  *  - net-spec: <tcp|o2ib|gni>[NUM]
3270  *    interfaces:
3271  *        0: <intf name>['['<expr>']']
3272  *        1: <intf name>['['<expr>']']
3273  *    ip-range:
3274  *        0: <expr.expr.expr.expr>
3275  *        1: <expr.expr.expr.expr>
3276  */
3277 static int handle_yaml_config_ip2nets(struct cYAML *tree,
3278                                       struct cYAML **show_rc,
3279                                       struct cYAML **err_rc)
3280 {
3281         struct cYAML *net, *ip_range, *item = NULL, *intf = NULL,
3282                      *seq_no = NULL;
3283         struct lustre_lnet_ip2nets ip2nets;
3284         struct lustre_lnet_ip_range_descr *ip_range_descr = NULL,
3285                                           *tmp = NULL;
3286         int rc = LUSTRE_CFG_RC_NO_ERR;
3287         struct cfs_expr_list *global_cpts = NULL;
3288         struct cfs_expr_list *el, *el_tmp;
3289         struct lnet_ioctl_config_lnd_tunables tunables;
3290         struct lnet_dlc_intf_descr *intf_descr, *intf_tmp;
3291         bool found = false;
3292
3293         memset(&tunables, 0, sizeof(tunables));
3294
3295         /* initialize all lists */
3296         INIT_LIST_HEAD(&ip2nets.ip2nets_ip_ranges);
3297         INIT_LIST_HEAD(&ip2nets.ip2nets_net.network_on_rule);
3298         INIT_LIST_HEAD(&ip2nets.ip2nets_net.nw_intflist);
3299
3300         net = cYAML_get_object_item(tree, "net-spec");
3301         if (net == NULL)
3302                 return LUSTRE_CFG_RC_BAD_PARAM;
3303
3304         if (net != NULL && net->cy_valuestring == NULL)
3305                 return LUSTRE_CFG_RC_BAD_PARAM;
3306
3307         /* assign the network id */
3308         ip2nets.ip2nets_net.nw_id = libcfs_str2net(net->cy_valuestring);
3309         if (ip2nets.ip2nets_net.nw_id == LNET_NID_ANY)
3310                 return LUSTRE_CFG_RC_BAD_PARAM;
3311
3312         seq_no = cYAML_get_object_item(tree, "seq_no");
3313
3314         intf = cYAML_get_object_item(tree, "interfaces");
3315         if (intf != NULL) {
3316                 rc = yaml_copy_intf_info(intf, &ip2nets.ip2nets_net);
3317                 if (rc <= 0)
3318                         return LUSTRE_CFG_RC_BAD_PARAM;
3319         }
3320
3321         ip_range = cYAML_get_object_item(tree, "ip-range");
3322         if (ip_range != NULL) {
3323                 item = ip_range->cy_child;
3324                 while (item != NULL) {
3325                         if (item->cy_valuestring == NULL) {
3326                                 item = item->cy_next;
3327                                 continue;
3328                         }
3329
3330                         rc = lustre_lnet_add_ip_range(&ip2nets.ip2nets_ip_ranges,
3331                                                       item->cy_valuestring);
3332
3333                         if (rc != LUSTRE_CFG_RC_NO_ERR)
3334                                 goto out;
3335
3336                         item = item->cy_next;
3337                 }
3338         }
3339
3340         found = yaml_extract_tunables(tree, &tunables, &global_cpts,
3341                                       LNET_NETTYP(ip2nets.ip2nets_net.nw_id));
3342
3343         rc = lustre_lnet_config_ip2nets(&ip2nets,
3344                         (found) ? &tunables : NULL,
3345                         global_cpts,
3346                         (seq_no) ? seq_no->cy_valueint : -1,
3347                         err_rc);
3348
3349         /*
3350          * don't stop because there was no match. Continue processing the
3351          * rest of the rules. If non-match then nothing is configured
3352          */
3353         if (rc == LUSTRE_CFG_RC_NO_MATCH)
3354                 rc = LUSTRE_CFG_RC_NO_ERR;
3355 out:
3356         list_for_each_entry_safe(intf_descr, intf_tmp,
3357                                  &ip2nets.ip2nets_net.nw_intflist,
3358                                  intf_on_network) {
3359                 list_del(&intf_descr->intf_on_network);
3360                 free_intf_descr(intf_descr);
3361         }
3362
3363         list_for_each_entry_safe(ip_range_descr, tmp,
3364                                  &ip2nets.ip2nets_ip_ranges,
3365                                  ipr_entry) {
3366                 list_del(&ip_range_descr->ipr_entry);
3367                 list_for_each_entry_safe(el, el_tmp, &ip_range_descr->ipr_expr,
3368                                          el_link) {
3369                         list_del(&el->el_link);
3370                         cfs_expr_list_free(el);
3371                 }
3372                 free(ip_range_descr);
3373         }
3374
3375         return rc;
3376 }
3377
3378 static int handle_yaml_del_ni(struct cYAML *tree, struct cYAML **show_rc,
3379                               struct cYAML **err_rc)
3380 {
3381         struct cYAML *net = NULL, *intf = NULL, *seq_no = NULL, *item = NULL,
3382                      *local_nis = NULL;
3383         int num_entries, rc;
3384         struct lnet_dlc_network_descr nw_descr;
3385
3386         INIT_LIST_HEAD(&nw_descr.network_on_rule);
3387         INIT_LIST_HEAD(&nw_descr.nw_intflist);
3388
3389         net = cYAML_get_object_item(tree, "net type");
3390         if (net != NULL)
3391                 nw_descr.nw_id = libcfs_str2net(net->cy_valuestring);
3392
3393         local_nis = cYAML_get_object_item(tree, "local NI(s)");
3394         if (local_nis == NULL)
3395                 return LUSTRE_CFG_RC_MISSING_PARAM;
3396
3397         if (!cYAML_is_sequence(local_nis))
3398                 return LUSTRE_CFG_RC_BAD_PARAM;
3399
3400         while (cYAML_get_next_seq_item(local_nis, &item) != NULL) {
3401                 intf = cYAML_get_object_item(item, "interfaces");
3402                 if (intf == NULL)
3403                         continue;
3404                 num_entries = yaml_copy_intf_info(intf, &nw_descr);
3405                 if (num_entries <= 0) {
3406                         cYAML_build_error(num_entries, -1, "ni", "add",
3407                                         "bad interface list",
3408                                         err_rc);
3409                         return LUSTRE_CFG_RC_BAD_PARAM;
3410                 }
3411         }
3412
3413         seq_no = cYAML_get_object_item(tree, "seq_no");
3414
3415         rc = lustre_lnet_del_ni((net) ? &nw_descr : NULL,
3416                                 (seq_no) ? seq_no->cy_valueint : -1,
3417                                 err_rc);
3418
3419         return rc;
3420 }
3421
3422 static int yaml_copy_peer_nids(struct cYAML *tree, char ***nidsppp, bool del)
3423 {
3424         struct cYAML *nids_entry = NULL, *child = NULL, *entry = NULL,
3425                      *prim_nid = NULL;
3426         char **nids = NULL;
3427         int num = 0, rc = LUSTRE_CFG_RC_NO_ERR;
3428
3429         prim_nid = cYAML_get_object_item(tree, "primary nid");
3430         if (!prim_nid || !prim_nid->cy_valuestring)
3431                 return LUSTRE_CFG_RC_MISSING_PARAM;
3432
3433         nids_entry = cYAML_get_object_item(tree, "peer ni");
3434         if (cYAML_is_sequence(nids_entry)) {
3435                 while (cYAML_get_next_seq_item(nids_entry, &child)) {
3436                         entry = cYAML_get_object_item(child, "nid");
3437                         /* don't count an empty entry */
3438                         if (!entry || !entry->cy_valuestring)
3439                                 continue;
3440
3441                         if ((strcmp(entry->cy_valuestring, prim_nid->cy_valuestring)
3442                                         == 0) && del) {
3443                                 /*
3444                                  * primary nid is present in the list of
3445                                  * nids so that means we want to delete
3446                                  * the entire peer, so no need to go
3447                                  * further. Just delete the entire peer.
3448                                  */
3449                                 return 0;
3450                         }
3451
3452                         num++;
3453                 }
3454         }
3455
3456         if (num == 0)
3457                 return LUSTRE_CFG_RC_MISSING_PARAM;
3458
3459         nids = calloc(sizeof(*nids) * num, 1);
3460         if (nids == NULL)
3461                 return LUSTRE_CFG_RC_OUT_OF_MEM;
3462
3463         /* now grab all the nids */
3464         num = 0;
3465         child = NULL;
3466         while (cYAML_get_next_seq_item(nids_entry, &child)) {
3467                 entry = cYAML_get_object_item(child, "nid");
3468                 if (!entry || !entry->cy_valuestring)
3469                         continue;
3470
3471                 nids[num] = calloc(strlen(entry->cy_valuestring) + 1, 1);
3472                 if (!nids[num]) {
3473                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3474                         goto failed;
3475                 }
3476                 strncpy(nids[num], entry->cy_valuestring,
3477                         strlen(entry->cy_valuestring));
3478                 num++;
3479         }
3480         rc = num;
3481
3482         *nidsppp = nids;
3483         return rc;
3484
3485 failed:
3486         if (nids != NULL)
3487                 yaml_free_string_array(nids, num);
3488         *nidsppp = NULL;
3489         return rc;
3490 }
3491
3492 static int handle_yaml_config_peer(struct cYAML *tree, struct cYAML **show_rc,
3493                                    struct cYAML **err_rc)
3494 {
3495         char **nids = NULL;
3496         int num, rc;
3497         struct cYAML *seq_no, *prim_nid, *non_mr;
3498
3499         num = yaml_copy_peer_nids(tree, &nids, false);
3500         if (num < 0)
3501                 return num;
3502
3503         seq_no = cYAML_get_object_item(tree, "seq_no");
3504         prim_nid = cYAML_get_object_item(tree, "primary nid");
3505         non_mr = cYAML_get_object_item(tree, "non_mr");
3506
3507         rc = lustre_lnet_config_peer_nid((prim_nid) ? prim_nid->cy_valuestring : NULL,
3508                                          nids, num,
3509                                          (non_mr) ? false : true,
3510                                          (seq_no) ? seq_no->cy_valueint : -1,
3511                                          err_rc);
3512
3513         yaml_free_string_array(nids, num);
3514         return rc;
3515 }
3516
3517 static int handle_yaml_del_peer(struct cYAML *tree, struct cYAML **show_rc,
3518                                 struct cYAML **err_rc)
3519 {
3520         char **nids = NULL;
3521         int num, rc;
3522         struct cYAML *seq_no, *prim_nid;
3523
3524         num = yaml_copy_peer_nids(tree, &nids, true);
3525         if (num < 0)
3526                 return num;
3527
3528         seq_no = cYAML_get_object_item(tree, "seq_no");
3529         prim_nid = cYAML_get_object_item(tree, "primary nid");
3530
3531         rc = lustre_lnet_del_peer_nid((prim_nid) ? prim_nid->cy_valuestring : NULL,
3532                                       nids, num,
3533                                       (seq_no) ? seq_no->cy_valueint : -1,
3534                                       err_rc);
3535
3536         yaml_free_string_array(nids, num);
3537         return rc;
3538 }
3539
3540 static int handle_yaml_config_buffers(struct cYAML *tree,
3541                                       struct cYAML **show_rc,
3542                                       struct cYAML **err_rc)
3543 {
3544         int rc;
3545         struct cYAML *tiny, *small, *large, *seq_no;
3546
3547         tiny = cYAML_get_object_item(tree, "tiny");
3548         small = cYAML_get_object_item(tree, "small");
3549         large = cYAML_get_object_item(tree, "large");
3550         seq_no = cYAML_get_object_item(tree, "seq_no");
3551
3552         rc = lustre_lnet_config_buffers((tiny) ? tiny->cy_valueint : -1,
3553                                         (small) ? small->cy_valueint : -1,
3554                                         (large) ? large->cy_valueint : -1,
3555                                         (seq_no) ? seq_no->cy_valueint : -1,
3556                                         err_rc);
3557
3558         return rc;
3559 }
3560
3561 static int handle_yaml_config_routing(struct cYAML *tree,
3562                                       struct cYAML **show_rc,
3563                                       struct cYAML **err_rc)
3564 {
3565         int rc = LUSTRE_CFG_RC_NO_ERR;
3566         struct cYAML *seq_no, *enable;
3567
3568         seq_no = cYAML_get_object_item(tree, "seq_no");
3569         enable = cYAML_get_object_item(tree, "enable");
3570
3571         if (enable) {
3572                 rc = lustre_lnet_enable_routing(enable->cy_valueint,
3573                                                 (seq_no) ?
3574                                                     seq_no->cy_valueint : -1,
3575                                                 err_rc);
3576         }
3577
3578         return rc;
3579 }
3580
3581 static int handle_yaml_del_route(struct cYAML *tree, struct cYAML **show_rc,
3582                                  struct cYAML **err_rc)
3583 {
3584         struct cYAML *net;
3585         struct cYAML *gw;
3586         struct cYAML *seq_no;
3587
3588         net = cYAML_get_object_item(tree, "net");
3589         gw = cYAML_get_object_item(tree, "gateway");
3590         seq_no = cYAML_get_object_item(tree, "seq_no");
3591
3592         return lustre_lnet_del_route((net) ? net->cy_valuestring : NULL,
3593                                      (gw) ? gw->cy_valuestring : NULL,
3594                                      (seq_no) ? seq_no->cy_valueint : -1,
3595                                      err_rc);
3596 }
3597
3598 static int handle_yaml_del_routing(struct cYAML *tree, struct cYAML **show_rc,
3599                                    struct cYAML **err_rc)
3600 {
3601         struct cYAML *seq_no;
3602
3603         seq_no = cYAML_get_object_item(tree, "seq_no");
3604
3605         return lustre_lnet_enable_routing(0, (seq_no) ?
3606                                                 seq_no->cy_valueint : -1,
3607                                         err_rc);
3608 }
3609
3610 static int handle_yaml_show_route(struct cYAML *tree, struct cYAML **show_rc,
3611                                   struct cYAML **err_rc)
3612 {
3613         struct cYAML *net;
3614         struct cYAML *gw;
3615         struct cYAML *hop;
3616         struct cYAML *prio;
3617         struct cYAML *detail;
3618         struct cYAML *seq_no;
3619
3620         net = cYAML_get_object_item(tree, "net");
3621         gw = cYAML_get_object_item(tree, "gateway");
3622         hop = cYAML_get_object_item(tree, "hop");
3623         prio = cYAML_get_object_item(tree, "priority");
3624         detail = cYAML_get_object_item(tree, "detail");
3625         seq_no = cYAML_get_object_item(tree, "seq_no");
3626
3627         return lustre_lnet_show_route((net) ? net->cy_valuestring : NULL,
3628                                       (gw) ? gw->cy_valuestring : NULL,
3629                                       (hop) ? hop->cy_valueint : -1,
3630                                       (prio) ? prio->cy_valueint : -1,
3631                                       (detail) ? detail->cy_valueint : 0,
3632                                       (seq_no) ? seq_no->cy_valueint : -1,
3633                                       show_rc,
3634                                       err_rc);
3635 }
3636
3637 static int handle_yaml_show_net(struct cYAML *tree, struct cYAML **show_rc,
3638                                 struct cYAML **err_rc)
3639 {
3640         struct cYAML *net, *detail, *seq_no;
3641
3642         net = cYAML_get_object_item(tree, "net");
3643         detail = cYAML_get_object_item(tree, "detail");
3644         seq_no = cYAML_get_object_item(tree, "seq_no");
3645
3646         return lustre_lnet_show_net((net) ? net->cy_valuestring : NULL,
3647                                     (detail) ? detail->cy_valueint : 0,
3648                                     (seq_no) ? seq_no->cy_valueint : -1,
3649                                     show_rc,
3650                                     err_rc);
3651 }
3652
3653 static int handle_yaml_show_routing(struct cYAML *tree, struct cYAML **show_rc,
3654                                     struct cYAML **err_rc)
3655 {
3656         struct cYAML *seq_no;
3657
3658         seq_no = cYAML_get_object_item(tree, "seq_no");
3659
3660         return lustre_lnet_show_routing((seq_no) ? seq_no->cy_valueint : -1,
3661                                         show_rc, err_rc);
3662 }
3663
3664 static int handle_yaml_show_peers(struct cYAML *tree, struct cYAML **show_rc,
3665                                   struct cYAML **err_rc)
3666 {
3667         struct cYAML *seq_no, *nid, *detail;
3668
3669         seq_no = cYAML_get_object_item(tree, "seq_no");
3670         detail = cYAML_get_object_item(tree, "detail");
3671         nid = cYAML_get_object_item(tree, "nid");
3672
3673         return lustre_lnet_show_peer((nid) ? nid->cy_valuestring : NULL,
3674                                      (detail) ? detail->cy_valueint : 0,
3675                                      (seq_no) ? seq_no->cy_valueint : -1,
3676                                      show_rc, err_rc);
3677 }
3678
3679 static int handle_yaml_show_stats(struct cYAML *tree, struct cYAML **show_rc,
3680                                   struct cYAML **err_rc)
3681 {
3682         struct cYAML *seq_no;
3683
3684         seq_no = cYAML_get_object_item(tree, "seq_no");
3685
3686         return lustre_lnet_show_stats((seq_no) ? seq_no->cy_valueint : -1,
3687                                       show_rc, err_rc);
3688 }
3689
3690 static int handle_yaml_config_global_settings(struct cYAML *tree,
3691                                               struct cYAML **show_rc,
3692                                               struct cYAML **err_rc)
3693 {
3694         struct cYAML *max_intf, *numa, *discovery, *seq_no;
3695         int rc = 0;
3696
3697         seq_no = cYAML_get_object_item(tree, "seq_no");
3698         max_intf = cYAML_get_object_item(tree, "max_intf");
3699         if (max_intf)
3700                 rc = lustre_lnet_config_max_intf(max_intf->cy_valueint,
3701                                                  seq_no ? seq_no->cy_valueint
3702                                                         : -1,
3703                                                  err_rc);
3704
3705         numa = cYAML_get_object_item(tree, "numa_range");
3706         if (numa)
3707                 rc = lustre_lnet_config_numa_range(numa->cy_valueint,
3708                                                    seq_no ? seq_no->cy_valueint
3709                                                         : -1,
3710                                                    err_rc);
3711
3712         discovery = cYAML_get_object_item(tree, "discovery");
3713         if (discovery)
3714                 rc = lustre_lnet_config_discovery(discovery->cy_valueint,
3715                                                   seq_no ? seq_no->cy_valueint
3716                                                         : -1,
3717                                                   err_rc);
3718
3719         return rc;
3720 }
3721
3722 static int handle_yaml_del_global_settings(struct cYAML *tree,
3723                                            struct cYAML **show_rc,
3724                                            struct cYAML **err_rc)
3725 {
3726         struct cYAML *max_intf, *numa, *discovery, *seq_no;
3727         int rc = 0;
3728
3729         seq_no = cYAML_get_object_item(tree, "seq_no");
3730         max_intf = cYAML_get_object_item(tree, "max_intf");
3731         if (max_intf)
3732                 rc = lustre_lnet_config_max_intf(LNET_INTERFACES_MAX_DEFAULT,
3733                                                  seq_no ? seq_no->cy_valueint
3734                                                         : -1,
3735                                                  err_rc);
3736
3737         numa = cYAML_get_object_item(tree, "numa_range");
3738         if (numa)
3739                 rc = lustre_lnet_config_numa_range(0,
3740                                                    seq_no ? seq_no->cy_valueint
3741                                                         : -1,
3742                                                    err_rc);
3743
3744         /* peer discovery is enabled by default */
3745         discovery = cYAML_get_object_item(tree, "discovery");
3746         if (discovery)
3747                 rc = lustre_lnet_config_discovery(1,
3748                                                   seq_no ? seq_no->cy_valueint
3749                                                         : -1,
3750                                                   err_rc);
3751
3752         return rc;
3753 }
3754
3755 static int handle_yaml_show_global_settings(struct cYAML *tree,
3756                                             struct cYAML **show_rc,
3757                                             struct cYAML **err_rc)
3758 {
3759         struct cYAML *max_intf, *numa, *discovery, *seq_no;
3760         int rc = 0;
3761
3762         seq_no = cYAML_get_object_item(tree, "seq_no");
3763         max_intf = cYAML_get_object_item(tree, "max_intf");
3764         if (max_intf)
3765                 rc = lustre_lnet_show_max_intf(seq_no ? seq_no->cy_valueint
3766                                                         : -1,
3767                                                 show_rc, err_rc);
3768
3769         numa = cYAML_get_object_item(tree, "numa_range");
3770         if (numa)
3771                 rc = lustre_lnet_show_numa_range(seq_no ? seq_no->cy_valueint
3772                                                         : -1,
3773                                                  show_rc, err_rc);
3774
3775         discovery = cYAML_get_object_item(tree, "discovery");
3776         if (discovery)
3777                 rc = lustre_lnet_show_discovery(seq_no ? seq_no->cy_valueint
3778                                                         : -1,
3779                                                 show_rc, err_rc);
3780
3781         return rc;
3782 }
3783
3784 static int handle_yaml_ping(struct cYAML *tree, struct cYAML **show_rc,
3785                             struct cYAML **err_rc)
3786 {
3787         struct cYAML *seq_no, *nid, *timeout;
3788
3789         seq_no = cYAML_get_object_item(tree, "seq_no");
3790         nid = cYAML_get_object_item(tree, "primary nid");
3791         timeout = cYAML_get_object_item(tree, "timeout");
3792
3793         return lustre_lnet_ping_nid((nid) ? nid->cy_valuestring : NULL,
3794                                     (timeout) ? timeout->cy_valueint : 1000,
3795                                     (seq_no) ? seq_no->cy_valueint : -1,
3796                                     show_rc, err_rc);
3797 }
3798
3799 static int handle_yaml_discover(struct cYAML *tree, struct cYAML **show_rc,
3800                                 struct cYAML **err_rc)
3801 {
3802         struct cYAML *seq_no, *nid, *force;
3803
3804         seq_no = cYAML_get_object_item(tree, "seq_no");
3805         nid = cYAML_get_object_item(tree, "primary nid");
3806         force = cYAML_get_object_item(tree, "force");
3807
3808         return lustre_lnet_discover_nid((nid) ? nid->cy_valuestring : NULL,
3809                                         (force) ? force->cy_valueint : 0,
3810                                         (seq_no) ? seq_no->cy_valueint : -1,
3811                                         show_rc, err_rc);
3812 }
3813
3814 static int handle_yaml_no_op()
3815 {
3816         return LUSTRE_CFG_RC_NO_ERR;
3817 }
3818
3819 struct lookup_cmd_hdlr_tbl {
3820         char *name;
3821         cmd_handler_t cb;
3822 };
3823
3824 static struct lookup_cmd_hdlr_tbl lookup_config_tbl[] = {
3825         { .name = "route",      .cb = handle_yaml_config_route },
3826         { .name = "net",        .cb = handle_yaml_config_ni },
3827         { .name = "ip2nets",    .cb = handle_yaml_config_ip2nets },
3828         { .name = "peer",       .cb = handle_yaml_config_peer },
3829         { .name = "routing",    .cb = handle_yaml_config_routing },
3830         { .name = "buffers",    .cb = handle_yaml_config_buffers },
3831         { .name = "statistics", .cb = handle_yaml_no_op },
3832         { .name = "global",     .cb = handle_yaml_config_global_settings},
3833         { .name = "ping",       .cb = handle_yaml_no_op },
3834         { .name = "discover",   .cb = handle_yaml_no_op },
3835         { .name = NULL } };
3836
3837 static struct lookup_cmd_hdlr_tbl lookup_del_tbl[] = {
3838         { .name = "route",      .cb = handle_yaml_del_route },
3839         { .name = "net",        .cb = handle_yaml_del_ni },
3840         { .name = "ip2nets",    .cb = handle_yaml_no_op },
3841         { .name = "peer",       .cb = handle_yaml_del_peer },
3842         { .name = "routing",    .cb = handle_yaml_del_routing },
3843         { .name = "buffers",    .cb = handle_yaml_no_op },
3844         { .name = "statistics", .cb = handle_yaml_no_op },
3845         { .name = "global",     .cb = handle_yaml_del_global_settings},
3846         { .name = "ping",       .cb = handle_yaml_no_op },
3847         { .name = "discover",   .cb = handle_yaml_no_op },
3848         { .name = NULL } };
3849
3850 static struct lookup_cmd_hdlr_tbl lookup_show_tbl[] = {
3851         { .name = "route",      .cb = handle_yaml_show_route },
3852         { .name = "net",        .cb = handle_yaml_show_net },
3853         { .name = "peer",       .cb = handle_yaml_show_peers },
3854         { .name = "ip2nets",    .cb = handle_yaml_no_op },
3855         { .name = "routing",    .cb = handle_yaml_show_routing },
3856         { .name = "buffers",    .cb = handle_yaml_show_routing },
3857         { .name = "statistics", .cb = handle_yaml_show_stats },
3858         { .name = "global",     .cb = handle_yaml_show_global_settings},
3859         { .name = "ping",       .cb = handle_yaml_no_op },
3860         { .name = "discover",   .cb = handle_yaml_no_op },
3861         { .name = NULL } };
3862
3863 static struct lookup_cmd_hdlr_tbl lookup_exec_tbl[] = {
3864         { .name = "route",      .cb = handle_yaml_no_op },
3865         { .name = "net",        .cb = handle_yaml_no_op },
3866         { .name = "peer",       .cb = handle_yaml_no_op },
3867         { .name = "ip2nets",    .cb = handle_yaml_no_op },
3868         { .name = "routing",    .cb = handle_yaml_no_op },
3869         { .name = "buffers",    .cb = handle_yaml_no_op },
3870         { .name = "statistics", .cb = handle_yaml_no_op },
3871         { .name = "global",     .cb = handle_yaml_no_op },
3872         { .name = "ping",       .cb = handle_yaml_ping },
3873         { .name = "discover",   .cb = handle_yaml_discover },
3874         { .name = NULL } };
3875
3876 static cmd_handler_t lookup_fn(char *key,
3877                                struct lookup_cmd_hdlr_tbl *tbl)
3878 {
3879         int i;
3880         if (key == NULL)
3881                 return NULL;
3882
3883         for (i = 0; tbl[i].name != NULL; i++) {
3884                 if (strncmp(key, tbl[i].name, strlen(tbl[i].name)) == 0)
3885                         return tbl[i].cb;
3886         }
3887
3888         return NULL;
3889 }
3890
3891 static int lustre_yaml_cb_helper(char *f, struct lookup_cmd_hdlr_tbl *table,
3892                                  struct cYAML **show_rc, struct cYAML **err_rc)
3893 {
3894         struct cYAML *tree, *item = NULL, *head, *child;
3895         cmd_handler_t cb;
3896         char err_str[LNET_MAX_STR_LEN];
3897         int rc = LUSTRE_CFG_RC_NO_ERR, return_rc = LUSTRE_CFG_RC_NO_ERR;
3898
3899         tree = cYAML_build_tree(f, NULL, 0, err_rc, false);
3900         if (tree == NULL)
3901                 return LUSTRE_CFG_RC_BAD_PARAM;
3902
3903         child = tree->cy_child;
3904         while (child != NULL) {
3905                 cb = lookup_fn(child->cy_string, table);
3906                 if (cb == NULL) {
3907                         snprintf(err_str, sizeof(err_str),
3908                                 "\"call back for '%s' not found\"",
3909                                 child->cy_string);
3910                         cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
3911                                         "yaml", "helper", err_str, err_rc);
3912                         goto out;
3913                 }
3914
3915                 if (cYAML_is_sequence(child)) {
3916                         while ((head = cYAML_get_next_seq_item(child, &item))
3917                                != NULL) {
3918                                 rc = cb(head, show_rc, err_rc);
3919                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
3920                                         return_rc = rc;
3921                         }
3922                 } else {
3923                         rc = cb(child, show_rc, err_rc);
3924                         if (rc != LUSTRE_CFG_RC_NO_ERR)
3925                                 return_rc = rc;
3926                 }
3927                 item = NULL;
3928                 child = child->cy_next;
3929         }
3930
3931 out:
3932         cYAML_free_tree(tree);
3933
3934         return return_rc;
3935 }
3936
3937 int lustre_yaml_config(char *f, struct cYAML **err_rc)
3938 {
3939         return lustre_yaml_cb_helper(f, lookup_config_tbl,
3940                                      NULL, err_rc);
3941 }
3942
3943 int lustre_yaml_del(char *f, struct cYAML **err_rc)
3944 {
3945         return lustre_yaml_cb_helper(f, lookup_del_tbl,
3946                                      NULL, err_rc);
3947 }
3948
3949 int lustre_yaml_show(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
3950 {
3951         return lustre_yaml_cb_helper(f, lookup_show_tbl,
3952                                      show_rc, err_rc);
3953 }
3954
3955 int lustre_yaml_exec(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
3956 {
3957         return lustre_yaml_cb_helper(f, lookup_exec_tbl,
3958                                      show_rc, err_rc);
3959 }