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, 2017, 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
  55 #define CONFIG_CMD              "configure"
  56 #define UNCONFIG_CMD            "unconfigure"
  57 #define ADD_CMD                 "add"
  58 #define DEL_CMD                 "del"
  59 #define SHOW_CMD                "show"
  60 #define DBG_CMD                 "dbg"
  61 #define MANAGE_CMD              "manage"
  62
  63 #define MAX_NUM_IPS             128
  64
  65 #define modparam_path "/sys/module/lnet/parameters/"
  66 #define gni_nid_path "/proc/cray_xt/"
  67
  68 const char *gmsg_stat_names[] = {"sent_stats", "received_stats",
  69                                  "dropped_stats"};
  70
  71 /*
  72  * lustre_lnet_ip_range_descr
  73  *      Describes an IP range.
  74  *      Each octect is an expression
  75  */
  76 struct lustre_lnet_ip_range_descr {
  77         struct list_head ipr_entry;
  78         struct list_head ipr_expr;
  79 };
  80
  81 /*
  82  * lustre_lnet_ip2nets
  83  *      Describes an ip2nets rule. This can be on a list of rules.
  84  */
  85 struct lustre_lnet_ip2nets {
  86         struct lnet_dlc_network_descr ip2nets_net;
  87         struct list_head ip2nets_ip_ranges;
  88 };
  89
  90 int open_sysfs_file(const char *path, const char *attr, const int mode)
  91 {
  92         int fd;
  93         char filename[LNET_MAX_STR_LEN];
  94
  95         if (strlen(path) + strlen(attr) >= LNET_MAX_STR_LEN)
  96                 return -1;
  97
  98         snprintf(filename, sizeof(filename), "%s%s",
  99                  path, attr);
 100
 101         fd = open(filename, mode);
 102
 103         return fd;
 104 }
 105
 106 static int read_sysfs_file(const char *path, const char *attr,
 107                            void *val, const size_t size, const int nelem)
 108 {
 109         int fd;
 110         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
 111
 112         fd = open_sysfs_file(path, attr, O_RDONLY);
 113         if (fd == -1)
 114                 return LUSTRE_CFG_RC_NO_MATCH;
 115
 116         if (read(fd, val, size * nelem) == -1)
 117                 goto close_fd;
 118
 119         rc = LUSTRE_CFG_RC_NO_ERR;
 120
 121 close_fd:
 122         close(fd);
 123         return rc;
 124 }
 125
 126 static int write_sysfs_file(const char *path, const char *attr,
 127                             void *val, const size_t size, const int nelem)
 128 {
 129         int fd;
 130         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
 131
 132         fd = open_sysfs_file(path, attr, O_WRONLY | O_TRUNC);
 133         if (fd == -1)
 134                 return LUSTRE_CFG_RC_NO_MATCH;
 135
 136         if (write(fd, val, size * nelem) == -1)
 137                 goto close_fd;
 138
 139         rc = LUSTRE_CFG_RC_NO_ERR;
 140
 141 close_fd:
 142         close(fd);
 143         return rc;
 144 }
 145
 146 /*
 147  * free_intf_descr
 148  *      frees the memory allocated for an intf descriptor.
 149  */
 150 void free_intf_descr(struct lnet_dlc_intf_descr *intf_descr)
 151 {
 152         if (!intf_descr)
 153                 return;
 154
 155         if (intf_descr->cpt_expr != NULL)
 156                 cfs_expr_list_free(intf_descr->cpt_expr);
 157         free(intf_descr);
 158 }
 159
 160 /*
 161  * lustre_lnet_add_ip_range
 162  * Formatting:
 163  *      given a string of the format:
 164  *      <expr.expr.expr.expr> parse each expr into
 165  *      a lustre_lnet_ip_range_descr structure and insert on the list.
 166  *
 167  *      This function is called from
 168  *              YAML on each ip-range.
 169  *              As a result of lnetctl command
 170  *              When building a NID or P2P selection rules
 171  */
 172 int lustre_lnet_add_ip_range(struct list_head *list, char *str_ip_range)
 173 {
 174         struct lustre_lnet_ip_range_descr *ip_range;
 175         int rc;
 176
 177         ip_range = calloc(1, sizeof(*ip_range));
 178         if (ip_range == NULL)
 179                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 180
 181         INIT_LIST_HEAD(&ip_range->ipr_entry);
 182         INIT_LIST_HEAD(&ip_range->ipr_expr);
 183
 184         rc = cfs_ip_addr_parse(str_ip_range, strlen(str_ip_range),
 185                                &ip_range->ipr_expr);
 186         if (rc != 0)
 187                 return LUSTRE_CFG_RC_BAD_PARAM;
 188
 189         list_add_tail(&ip_range->ipr_entry, list);
 190
 191         return LUSTRE_CFG_RC_NO_ERR;
 192 }
 193
 194 int lustre_lnet_add_intf_descr(struct list_head *list, char *intf, int len)
 195 {
 196         char *open_sq_bracket = NULL, *close_sq_bracket = NULL,
 197              *intf_name;
 198         struct lnet_dlc_intf_descr *intf_descr = NULL;
 199         int rc;
 200         char intf_string[LNET_MAX_STR_LEN];
 201
 202         if (len >= LNET_MAX_STR_LEN)
 203                 return LUSTRE_CFG_RC_BAD_PARAM;
 204
 205         strncpy(intf_string, intf, len);
 206         intf_string[len] = '\0';
 207
 208         intf_descr = calloc(1, sizeof(*intf_descr));
 209         if (intf_descr == NULL)
 210                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 211
 212         INIT_LIST_HEAD(&intf_descr->intf_on_network);
 213
 214         intf_name = intf_string;
 215         open_sq_bracket = strchr(intf_string, '[');
 216         if (open_sq_bracket != NULL) {
 217                 close_sq_bracket = strchr(intf_string, ']');
 218                 if (close_sq_bracket == NULL) {
 219                         free(intf_descr);
 220                         return LUSTRE_CFG_RC_BAD_PARAM;
 221                 }
 222                 rc = cfs_expr_list_parse(open_sq_bracket,
 223                                          strlen(open_sq_bracket), 0, UINT_MAX,
 224                                          &intf_descr->cpt_expr);
 225                 if (rc < 0) {
 226                         free(intf_descr);
 227                         return LUSTRE_CFG_RC_BAD_PARAM;
 228                 }
 229                 strncpy(intf_descr->intf_name, intf_name,
 230                         open_sq_bracket - intf_name);
 231                 intf_descr->intf_name[open_sq_bracket - intf_name] = '\0';
 232         } else {
 233                 strcpy(intf_descr->intf_name, intf_name);
 234                 intf_descr->cpt_expr = NULL;
 235         }
 236
 237         list_add_tail(&intf_descr->intf_on_network, list);
 238
 239         return LUSTRE_CFG_RC_NO_ERR;
 240 }
 241
 242 void lustre_lnet_init_nw_descr(struct lnet_dlc_network_descr *nw_descr)
 243 {
 244         if (nw_descr != NULL) {
 245                 nw_descr->nw_id = 0;
 246                 INIT_LIST_HEAD(&nw_descr->network_on_rule);
 247                 INIT_LIST_HEAD(&nw_descr->nw_intflist);
 248         }
 249 }
 250
 251 static char *get_next_delimiter_in_nid(char *str, char sep)
 252 {
 253         char *at, *comma;
 254
 255         /* first find the '@' */
 256         at = strchr(str, '@');
 257         if (!at)
 258                 return str;
 259
 260         /* now that you found the at find the sep after */
 261         comma = strchr(at, sep);
 262         return comma;
 263 }
 264
 265 int lustre_lnet_parse_nids(char *nids, char **array, int size,
 266                            char ***out_array)
 267 {
 268         int num_nids = 0;
 269         char *comma = nids, *cur, *entry;
 270         char **new_array;
 271         int i, len, start = 0, finish = 0;
 272
 273         if (nids == NULL || strlen(nids) == 0)
 274                 return size;
 275
 276         /* count the number or new nids, by counting the number of comma*/
 277         while (comma) {
 278                 comma = get_next_delimiter_in_nid(comma, ',');
 279                 if (comma) {
 280                         comma++;
 281                         num_nids++;
 282                 } else {
 283                         num_nids++;
 284                 }
 285         }
 286
 287         /*
 288          * if the array is not NULL allocate a large enough array to house
 289          * the old and new entries
 290          */
 291         new_array = calloc(sizeof(char*),
 292                            (size > 0) ? size + num_nids : num_nids);
 293
 294         if (!new_array)
 295                 goto failed;
 296
 297         /* parse our the new nids and add them to the tail of the array */
 298         comma = nids;
 299         cur = nids;
 300         start = (size > 0) ? size: 0;
 301         finish = (size > 0) ? size + num_nids : num_nids;
 302         for (i = start; i < finish; i++) {
 303                 comma = get_next_delimiter_in_nid(comma, ',');
 304                 if (!comma)
 305                         /*
 306                          * the length of the string to be parsed out is
 307                          * from cur to end of string. So it's good enough
 308                          * to strlen(cur)
 309                          */
 310                         len = strlen(cur) + 1;
 311                 else
 312                         /* length of the string is comma - cur */
 313                         len = (comma - cur) + 1;
 314
 315                 entry = calloc(1, len);
 316                 if (!entry) {
 317                         finish = i > 0 ? i - 1: 0;
 318                         goto failed;
 319                 }
 320                 strncpy(entry, cur, len - 1);
 321                 entry[len] = '\0';
 322                 new_array[i] = entry;
 323                 if (comma) {
 324                         comma++;
 325                         cur = comma;
 326                 }
 327         }
 328
 329         /* add the old entries in the array and delete the old array*/
 330         for (i = 0; i < size; i++)
 331                 new_array[i] = array[i];
 332
 333         if (array)
 334                 free(array);
 335
 336         *out_array = new_array;
 337
 338         return finish;
 339
 340 failed:
 341         for (i = start; i < finish; i++)
 342                 free(new_array[i]);
 343         if (new_array)
 344                 free(new_array);
 345
 346         return size;
 347 }
 348
 349 /*
 350  * format expected:
 351  *      <intf>[<expr>], <intf>[<expr>],..
 352  */
 353 int lustre_lnet_parse_interfaces(char *intf_str,
 354                                  struct lnet_dlc_network_descr *nw_descr)
 355 {
 356         char *open_square;
 357         char *close_square;
 358         char *comma;
 359         char *cur = intf_str, *next = NULL;
 360         char *end = intf_str + strlen(intf_str);
 361         int rc, len;
 362         struct lnet_dlc_intf_descr *intf_descr, *tmp;
 363
 364         if (nw_descr == NULL)
 365                 return LUSTRE_CFG_RC_BAD_PARAM;
 366
 367         while (cur < end) {
 368                 open_square = strchr(cur, '[');
 369                 if (open_square != NULL) {
 370                         close_square = strchr(cur, ']');
 371                         if (close_square == NULL) {
 372                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 373                                 goto failed;
 374                         }
 375
 376                         comma = strchr(cur, ',');
 377                         if (comma != NULL && comma > close_square) {
 378                                 next = comma + 1;
 379                                 len = next - close_square;
 380                         } else {
 381                                 len = strlen(cur);
 382                                 next = cur + len;
 383                         }
 384                 } else {
 385                         comma = strchr(cur, ',');
 386                         if (comma != NULL) {
 387                                 next = comma + 1;
 388                                 len = comma - cur;
 389                         } else {
 390                                 len = strlen(cur);
 391                                 next = cur + len;
 392                         }
 393                 }
 394
 395                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist, cur, len);
 396                 if (rc != LUSTRE_CFG_RC_NO_ERR)
 397                         goto failed;
 398
 399                 cur = next;
 400         }
 401
 402         return LUSTRE_CFG_RC_NO_ERR;
 403
 404 failed:
 405         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
 406                                  intf_on_network) {
 407                 list_del(&intf_descr->intf_on_network);
 408                 free_intf_descr(intf_descr);
 409         }
 410
 411         return rc;
 412 }
 413
 414 int lustre_lnet_config_lib_init(void)
 415 {
 416         return register_ioc_dev(LNET_DEV_ID, LNET_DEV_PATH);
 417 }
 418
 419 void lustre_lnet_config_lib_uninit(void)
 420 {
 421         unregister_ioc_dev(LNET_DEV_ID);
 422 }
 423
 424 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
 425                                  int seq_no, struct cYAML **err_rc)
 426 {
 427         struct libcfs_ioctl_data data;
 428         unsigned int opc;
 429         int rc;
 430         char err_str[LNET_MAX_STR_LEN];
 431
 432         snprintf(err_str, sizeof(err_str), "\"Success\"");
 433
 434         LIBCFS_IOC_INIT(data);
 435
 436         /* Reverse logic is used here in order not to change
 437          * the lctl utility */
 438         data.ioc_flags = load_ni_from_mod ? 0 : 1;
 439
 440         opc = up ? IOC_LIBCFS_CONFIGURE : IOC_LIBCFS_UNCONFIGURE;
 441
 442         rc = l_ioctl(LNET_DEV_ID, opc, &data);
 443         if (rc != 0) {
 444                 snprintf(err_str,
 445                         sizeof(err_str),
 446                         "\"LNet %s error: %s\"", (up) ? "configure" :
 447                         "unconfigure", strerror(errno));
 448                 rc = -errno;
 449         }
 450
 451         cYAML_build_error(rc, seq_no, (up) ? CONFIG_CMD : UNCONFIG_CMD,
 452                           "lnet", err_str, err_rc);
 453
 454         return rc;
 455 }
 456
 457 static int dispatch_peer_ni_cmd(lnet_nid_t pnid, lnet_nid_t nid, __u32 cmd,
 458                                 struct lnet_ioctl_peer_cfg *data,
 459                                 char *err_str, char *cmd_str)
 460 {
 461         int rc;
 462
 463         data->prcfg_prim_nid = pnid;
 464         data->prcfg_cfg_nid = nid;
 465
 466         rc = l_ioctl(LNET_DEV_ID, cmd, data);
 467         if (rc != 0) {
 468                 rc = -errno;
 469                 snprintf(err_str,
 470                         LNET_MAX_STR_LEN,
 471                         "\"cannot %s peer ni: %s\"",
 472                         (cmd_str) ? cmd_str : "add", strerror(errno));
 473                 err_str[LNET_MAX_STR_LEN - 1] = '\0';
 474         }
 475
 476         return rc;
 477 }
 478
 479 static int infra_ping_nid(char *ping_nids, char *oper, int param, int ioc_call,
 480                           int seq_no, struct cYAML **show_rc,
 481                           struct cYAML **err_rc)
 482 {
 483         void *data = NULL;
 484         struct lnet_ioctl_ping_data ping;
 485         struct cYAML *root = NULL, *ping_node = NULL, *item = NULL,
 486                      *first_seq = NULL, *tmp = NULL, *peer_ni = NULL;
 487         struct lnet_process_id id;
 488         char err_str[LNET_MAX_STR_LEN] = {0};
 489         char *sep, *token, *end;
 490         char buf[6];
 491         size_t len;
 492         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 493         int i;
 494         bool flag = false;
 495
 496         len = (sizeof(struct lnet_process_id) * LNET_INTERFACES_MAX_DEFAULT);
 497
 498         data = calloc(1, len);
 499         if (data == NULL)
 500                 goto out;
 501
 502         /* create struct cYAML root object */
 503         root = cYAML_create_object(NULL, NULL);
 504         if (root == NULL)
 505                 goto out;
 506
 507         ping_node = cYAML_create_seq(root, oper);
 508         if (ping_node == NULL)
 509                 goto out;
 510
 511         /* tokenise each nid in string ping_nids */
 512         token = strtok(ping_nids, ",");
 513
 514         do {
 515                 item = cYAML_create_seq_item(ping_node);
 516                 if (item == NULL)
 517                         goto out;
 518
 519                 if (first_seq == NULL)
 520                         first_seq = item;
 521
 522                 /* check if '-' is a part of NID, token */
 523                 sep = strchr(token, '-');
 524                 if (sep == NULL) {
 525                         id.pid = LNET_PID_ANY;
 526                         /* if no net is specified, libcfs_str2nid() will assume tcp */
 527                         id.nid = libcfs_str2nid(token);
 528                         if (id.nid == LNET_NID_ANY) {
 529                                 snprintf(err_str, sizeof(err_str),
 530                                          "\"cannot parse NID '%s'\"",
 531                                          token);
 532                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 533                                 cYAML_build_error(rc, seq_no, MANAGE_CMD,
 534                                                   oper, err_str, err_rc);
 535                                 continue;
 536                         }
 537                 } else {
 538                         if (token[0] == 'u' || token[0] == 'U')
 539                                 id.pid = (strtoul(&token[1], &end, 0) |
 540                                           (LNET_PID_USERFLAG));
 541                         else
 542                                 id.pid = strtoul(token, &end, 0);
 543
 544                         /* assuming '-' is part of hostname */
 545                         if (end != sep) {
 546                                 id.pid = LNET_PID_ANY;
 547                                 id.nid = libcfs_str2nid(token);
 548                                 if (id.nid == LNET_NID_ANY) {
 549                                         snprintf(err_str, sizeof(err_str),
 550                                                  "\"cannot parse NID '%s'\"",
 551                                                  token);
 552                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 553                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 554                                                           oper, err_str,
 555                                                           err_rc);
 556                                         continue;
 557                                 }
 558                         } else {
 559                                 id.nid = libcfs_str2nid(sep + 1);
 560                                 if (id.nid == LNET_NID_ANY) {
 561                                         snprintf(err_str, sizeof(err_str),
 562                                                  "\"cannot parse NID '%s'\"",
 563                                                  token);
 564                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 565                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 566                                                           oper, err_str,
 567                                                           err_rc);
 568                                         continue;
 569                                 }
 570                         }
 571                 }
 572                 LIBCFS_IOC_INIT_V2(ping, ping_hdr);
 573                 ping.ping_hdr.ioc_len = sizeof(ping);
 574                 ping.ping_id          = id;
 575                 ping.op_param         = param;
 576                 ping.ping_count       = LNET_INTERFACES_MAX_DEFAULT;
 577                 ping.ping_buf         = data;
 578
 579                 rc = l_ioctl(LNET_DEV_ID, ioc_call, &ping);
 580                 if (rc != 0) {
 581                         snprintf(err_str,
 582                                  sizeof(err_str), "failed to %s %s: %s\n", oper,
 583                                  id.pid == LNET_PID_ANY ?
 584                                  libcfs_nid2str(id.nid) :
 585                                  libcfs_id2str(id), strerror(errno));
 586                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 587                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 588                                           oper, err_str, err_rc);
 589                         continue;
 590                 }
 591
 592                 if (cYAML_create_string(item, "primary nid",
 593                                         libcfs_nid2str(ping.ping_id.nid)) == NULL)
 594                         goto out;
 595
 596                 if (cYAML_create_string(item, "Multi-Rail", ping.mr_info ?
 597                                         "True" : "False") == NULL)
 598                         goto out;
 599
 600                 tmp = cYAML_create_seq(item, "peer ni");
 601                 if (tmp == NULL)
 602                         goto out;
 603
 604                 for (i = 0; i < ping.ping_count; i++) {
 605                         if (!strcmp(libcfs_nid2str(ping.ping_buf[i].nid),
 606                                     "0@lo"))
 607                                 continue;
 608                         peer_ni = cYAML_create_seq_item(tmp);
 609                         if (peer_ni == NULL)
 610                                 goto out;
 611                         memset(buf, 0, sizeof buf);
 612                         snprintf(buf, sizeof buf, "nid");
 613                         if (cYAML_create_string(peer_ni, buf,
 614                                                 libcfs_nid2str(ping.ping_buf[i].nid)) == NULL)
 615                                 goto out;
 616                 }
 617
 618                 flag = true;
 619
 620         } while ((token = strtok(NULL, ",")) != NULL);
 621
 622         if (flag)
 623                 rc = LUSTRE_CFG_RC_NO_ERR;
 624
 625 out:
 626         if (data)
 627                 free(data);
 628         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
 629                 cYAML_free_tree(root);
 630         } else if (show_rc != NULL && *show_rc != NULL) {
 631                 struct cYAML *show_node;
 632                 show_node = cYAML_get_object_item(*show_rc, oper);
 633                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 634                         cYAML_insert_child(show_node, first_seq);
 635                         free(ping_node);
 636                         free(root);
 637                 } else if (show_node == NULL) {
 638                         cYAML_insert_sibling((*show_rc)->cy_child,
 639                                              ping_node);
 640                         free(root);
 641                 } else {
 642                         cYAML_free_tree(root);
 643                 }
 644         } else {
 645                 *show_rc = root;
 646         }
 647
 648         return rc;
 649 }
 650
 651 int lustre_lnet_ping_nid(char *ping_nids, int timeout, int seq_no,
 652                          struct cYAML **show_rc, struct cYAML **err_rc)
 653 {
 654         int rc;
 655
 656         rc = infra_ping_nid(ping_nids, "ping", timeout, IOC_LIBCFS_PING_PEER,
 657                             seq_no, show_rc, err_rc);
 658         return rc;
 659 }
 660
 661 int lustre_lnet_discover_nid(char *ping_nids, int force, int seq_no,
 662                          struct cYAML **show_rc, struct cYAML **err_rc)
 663 {
 664         int rc;
 665
 666         rc = infra_ping_nid(ping_nids, "discover", force, IOC_LIBCFS_DISCOVER,
 667                             seq_no, show_rc, err_rc);
 668         return rc;
 669 }
 670
 671 static void lustre_lnet_clean_ip2nets(struct lustre_lnet_ip2nets *ip2nets)
 672 {
 673         struct lustre_lnet_ip_range_descr *ipr, *tmp;
 674         struct cfs_expr_list *el, *el_tmp;
 675
 676         list_for_each_entry_safe(ipr, tmp,
 677                                  &ip2nets->ip2nets_ip_ranges,
 678                                  ipr_entry) {
 679                 list_del(&ipr->ipr_entry);
 680                 list_for_each_entry_safe(el, el_tmp, &ipr->ipr_expr,
 681                                          el_link) {
 682                         list_del(&el->el_link);
 683                         cfs_expr_list_free(el);
 684                 }
 685                 free(ipr);
 686         }
 687 }
 688
 689 /*
 690  * returns an rc < 0 if there is an error
 691  * otherwise it returns the number IPs generated
 692  *  it also has out params: net - network name
 693  */
 694 static int lnet_expr2ips(char *nidstr, __u32 *ip_list,
 695                          struct lustre_lnet_ip2nets *ip2nets,
 696                          __u32 *net, char *err_str)
 697 {
 698         struct lustre_lnet_ip_range_descr *ipr;
 699         char *comp1, *comp2;
 700         int ip_idx = MAX_NUM_IPS - 1;
 701         int ip_range_len, rc = LUSTRE_CFG_RC_NO_ERR;
 702         __u32 net_type;
 703         char ip_range[LNET_MAX_STR_LEN];
 704
 705         /* separate the two components of the NID */
 706         comp1 = nidstr;
 707         comp2 = strchr(nidstr, '@');
 708         if (comp2 == NULL) {
 709                 snprintf(err_str,
 710                         LNET_MAX_STR_LEN,
 711                         "\"cannot parse NID %s\"", nidstr);
 712                 err_str[LNET_MAX_STR_LEN - 1] = '\0';
 713                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 714                 goto out;
 715         }
 716
 717         /* length of the expected ip-range */
 718         ip_range_len = comp2 - comp1;
 719         if (ip_range_len >= LNET_MAX_STR_LEN) {
 720                 snprintf(err_str,
 721                         LNET_MAX_STR_LEN,
 722                         "\"cannot parse ip_range '%s'\"", ip_range);
 723                 err_str[LNET_MAX_STR_LEN - 1] = '\0';
 724                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 725                 goto out;
 726         }
 727
 728         /* move beyond '@' */
 729         comp2++;
 730
 731         /*
 732          * if the net component is either o2ib or tcp then we expect
 733          * an IP range which could only be a single IP address.
 734          * Parse that.
 735          */
 736         *net = libcfs_str2net(comp2);
 737         net_type = LNET_NETTYP(*net);
 738         /* expression support is for o2iblnd and socklnd only */
 739         if (net_type != O2IBLND && net_type != SOCKLND)
 740                 return LUSTRE_CFG_RC_SKIP;
 741
 742         strncpy(ip_range, comp1, ip_range_len);
 743         ip_range[ip_range_len] = '\0';
 744         ip2nets->ip2nets_net.nw_id = *net;
 745
 746         rc = lustre_lnet_add_ip_range(&ip2nets->ip2nets_ip_ranges, ip_range);
 747         if (rc != LUSTRE_CFG_RC_NO_ERR) {
 748                 snprintf(err_str,
 749                         LNET_MAX_STR_LEN,
 750                         "\"cannot parse ip_range '%s'\"", ip_range);
 751                 err_str[LNET_MAX_STR_LEN - 1] = '\0';
 752                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 753                 goto out;
 754         }
 755
 756         /*
 757         * Generate all the IP Addresses from the parsed range. For sanity
 758         * we allow only a max of MAX_NUM_IPS nids to be configured for
 759         * a single peer.
 760         */
 761         list_for_each_entry(ipr, &ip2nets->ip2nets_ip_ranges, ipr_entry)
 762                 ip_idx = cfs_ip_addr_range_gen(ip_list, MAX_NUM_IPS,
 763                                                 &ipr->ipr_expr);
 764
 765         if (ip_idx == MAX_NUM_IPS - 1) {
 766                 snprintf(err_str, LNET_MAX_STR_LEN,
 767                                 "no NIDs provided for configuration");
 768                 err_str[LNET_MAX_STR_LEN - 1] = '\0';
 769                 rc = LUSTRE_CFG_RC_NO_MATCH;
 770                 goto out;
 771         } else if (ip_idx == -1) {
 772                 rc = LUSTRE_CFG_RC_LAST_ELEM;
 773         } else {
 774                 rc = ip_idx;
 775         }
 776
 777 out:
 778         return rc;
 779 }
 780
 781 static int lustre_lnet_handle_peer_ip2nets(char **nid, int num_nids, bool mr,
 782                                            bool range, __u32 cmd,
 783                                            char *cmd_type, char *err_str)
 784 {
 785         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 786         int ip_idx;
 787         int i, j, rc = LUSTRE_CFG_RC_NO_ERR;
 788         __u32 ip_list[MAX_NUM_IPS];
 789         struct lustre_lnet_ip2nets ip2nets;
 790         struct lnet_ioctl_peer_cfg data;
 791         lnet_nid_t peer_nid;
 792         lnet_nid_t prim_nid = LNET_NID_ANY;
 793
 794         /* initialize all lists */
 795         INIT_LIST_HEAD(&ip2nets.ip2nets_ip_ranges);
 796         INIT_LIST_HEAD(&ip2nets.ip2nets_net.network_on_rule);
 797         INIT_LIST_HEAD(&ip2nets.ip2nets_net.nw_intflist);
 798
 799         /* each nid entry is an expression */
 800         for (i = 0; i < num_nids; i++) {
 801                 if (!range && i == 0)
 802                         prim_nid = libcfs_str2nid(nid[0]);
 803                 else if (range)
 804                         prim_nid = LNET_NID_ANY;
 805
 806                 rc = lnet_expr2ips(nid[i], ip_list, &ip2nets, &net, err_str);
 807                 if (rc == LUSTRE_CFG_RC_SKIP)
 808                         continue;
 809                 else if (rc == LUSTRE_CFG_RC_LAST_ELEM)
 810                         rc = -1;
 811                 else if (rc < LUSTRE_CFG_RC_NO_ERR)
 812                         goto out;
 813
 814                 ip_idx = rc;
 815
 816                 for (j = MAX_NUM_IPS - 1; j > ip_idx; j--) {
 817                         peer_nid = LNET_MKNID(net, ip_list[j]);
 818                         if (peer_nid == LNET_NID_ANY) {
 819                                 snprintf(err_str,
 820                                         LNET_MAX_STR_LEN,
 821                                         "\"cannot parse NID\"");
 822                                 err_str[LNET_MAX_STR_LEN - 1] = '\0';
 823                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 824                                 goto out;
 825                         }
 826
 827                         LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
 828                         data.prcfg_mr = mr;
 829
 830                         if (prim_nid == LNET_NID_ANY && j == MAX_NUM_IPS - 1) {
 831                                 prim_nid = peer_nid;
 832                                 peer_nid = LNET_NID_ANY;
 833                         }
 834
 835                         if (!range && num_nids > 1 && i == 0 &&
 836                             cmd == IOC_LIBCFS_DEL_PEER_NI)
 837                                 continue;
 838                         else if (!range && i == 0)
 839                                 peer_nid = LNET_NID_ANY;
 840
 841                         /*
 842                         * If prim_nid is not provided then the first nid in the
 843                         * list becomes the prim_nid. First time round the loop
 844                         * use LNET_NID_ANY for the first parameter, then use
 845                         * nid[0] as the key nid after wards
 846                         */
 847                         rc = dispatch_peer_ni_cmd(prim_nid, peer_nid, cmd,
 848                                                   &data, err_str, cmd_type);
 849                         if (rc != 0)
 850                                 goto out;
 851
 852                         /*
 853                          * we just deleted the entire peer using the
 854                          * primary_nid. So don't bother iterating through
 855                          * the rest of the nids
 856                          */
 857                         if (prim_nid != LNET_NID_ANY &&
 858                             peer_nid == LNET_NID_ANY &&
 859                             cmd == IOC_LIBCFS_DEL_PEER_NI)
 860                                 goto next_nid;
 861                 }
 862 next_nid:
 863                 lustre_lnet_clean_ip2nets(&ip2nets);
 864         }
 865
 866 out:
 867         lustre_lnet_clean_ip2nets(&ip2nets);
 868         return rc;
 869 }
 870
 871 int lustre_lnet_config_peer_nid(char *pnid, char **nid, int num_nids,
 872                                 bool mr, bool ip2nets, int seq_no,
 873                                 struct cYAML **err_rc)
 874 {
 875         int rc = LUSTRE_CFG_RC_NO_ERR;
 876         char err_str[LNET_MAX_STR_LEN] = {0};
 877         char **nid_array = NULL;
 878
 879         snprintf(err_str, sizeof(err_str), "\"Success\"");
 880
 881         if (ip2nets) {
 882                 rc = lustre_lnet_handle_peer_ip2nets(nid, num_nids, mr,
 883                                                 ip2nets, IOC_LIBCFS_ADD_PEER_NI,
 884                                                 ADD_CMD, err_str);
 885                 goto out;
 886         }
 887
 888         if (pnid) {
 889                 if (libcfs_str2nid(pnid) == LNET_NID_ANY) {
 890                         snprintf(err_str, sizeof(err_str),
 891                                  "bad primary NID: '%s'",
 892                                  pnid);
 893                         rc = LUSTRE_CFG_RC_MISSING_PARAM;
 894                         goto out;
 895                 }
 896
 897                 num_nids++;
 898
 899                 nid_array = calloc(sizeof(*nid_array), num_nids);
 900                 if (!nid_array) {
 901                         snprintf(err_str, sizeof(err_str),
 902                                         "out of memory");
 903                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 904                         goto out;
 905                 }
 906                 nid_array[0] = pnid;
 907                 memcpy(&nid_array[1], nid, sizeof(*nid) * (num_nids - 1));
 908         }
 909
 910         rc = lustre_lnet_handle_peer_ip2nets((pnid) ? nid_array : nid,
 911                                              num_nids, mr, ip2nets,
 912                                              IOC_LIBCFS_ADD_PEER_NI, ADD_CMD,
 913                                              err_str);
 914         if (rc)
 915                 goto out;
 916
 917 out:
 918         if (nid_array)
 919                 free(nid_array);
 920
 921         cYAML_build_error(rc, seq_no, ADD_CMD, "peer_ni", err_str, err_rc);
 922         return rc;
 923 }
 924
 925 int lustre_lnet_del_peer_nid(char *pnid, char **nid, int num_nids,
 926                              bool ip2nets, int seq_no, struct cYAML **err_rc)
 927 {
 928         int rc = LUSTRE_CFG_RC_NO_ERR;
 929         char err_str[LNET_MAX_STR_LEN] = {0};
 930         char **nid_array = NULL;
 931
 932         snprintf(err_str, sizeof(err_str), "\"Success\"");
 933
 934         if (ip2nets) {
 935                 rc = lustre_lnet_handle_peer_ip2nets(nid, num_nids, false,
 936                                                 ip2nets, IOC_LIBCFS_DEL_PEER_NI,
 937                                                 DEL_CMD, err_str);
 938                 goto out;
 939         }
 940
 941         if (pnid == NULL) {
 942                 snprintf(err_str, sizeof(err_str),
 943                          "\"Primary nid is not provided\"");
 944                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 945                 goto out;
 946         } else if (!ip2nets) {
 947                 if (libcfs_str2nid(pnid) == LNET_NID_ANY) {
 948                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 949                         snprintf(err_str, sizeof(err_str),
 950                                  "bad key NID: '%s'",
 951                                  pnid);
 952                         goto out;
 953                 }
 954         }
 955
 956         num_nids++;
 957         nid_array = calloc(sizeof(*nid_array), num_nids);
 958         if (!nid_array) {
 959                 snprintf(err_str, sizeof(err_str),
 960                                 "out of memory");
 961                 rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 962                 goto out;
 963         }
 964         nid_array[0] = pnid;
 965         memcpy(&nid_array[1], nid, sizeof(*nid) * (num_nids - 1));
 966
 967         rc = lustre_lnet_handle_peer_ip2nets(nid_array, num_nids, false,
 968                                              ip2nets, IOC_LIBCFS_DEL_PEER_NI,
 969                                              DEL_CMD, err_str);
 970         if (rc)
 971                 goto out;
 972
 973 out:
 974         if (nid_array)
 975                 free(nid_array);
 976
 977         cYAML_build_error(rc, seq_no, DEL_CMD, "peer_ni", err_str, err_rc);
 978         return rc;
 979 }
 980
 981 int lustre_lnet_config_route(char *nw, char *gw, int hops, int prio,
 982                              int seq_no, struct cYAML **err_rc)
 983 {
 984         struct lnet_ioctl_config_data data;
 985         lnet_nid_t gateway_nid;
 986         int rc = LUSTRE_CFG_RC_NO_ERR;
 987         int ip_idx, i;
 988         __u32 rnet = LNET_NIDNET(LNET_NID_ANY);
 989         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 990         char err_str[LNET_MAX_STR_LEN];
 991         __u32 ip_list[MAX_NUM_IPS];
 992         struct lustre_lnet_ip2nets ip2nets;
 993
 994         /* initialize all lists */
 995         INIT_LIST_HEAD(&ip2nets.ip2nets_ip_ranges);
 996         INIT_LIST_HEAD(&ip2nets.ip2nets_net.network_on_rule);
 997         INIT_LIST_HEAD(&ip2nets.ip2nets_net.nw_intflist);
 998
 999         snprintf(err_str, sizeof(err_str), "\"Success\"");
1000
1001         if (nw == NULL || gw == NULL) {
1002                 snprintf(err_str,
1003                          sizeof(err_str),
1004                          "\"missing mandatory parameter in route config:'%s'\"",
1005                          (nw == NULL && gw == NULL) ? "network, gateway" :
1006                          (nw == NULL) ? "network" : "gateway");
1007                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1008                 goto out;
1009         }
1010
1011         rnet = libcfs_str2net(nw);
1012         if (rnet == LNET_NIDNET(LNET_NID_ANY)) {
1013                 snprintf(err_str,
1014                          sizeof(err_str),
1015                          "\"cannot parse remote net %s\"", nw);
1016                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1017                 goto out;
1018         }
1019
1020         if (hops == -1) {
1021                 /* hops is undefined */
1022                 hops = LNET_UNDEFINED_HOPS;
1023         } else if (hops < 1 || hops > 255) {
1024                 snprintf(err_str,
1025                         sizeof(err_str),
1026                         "\"invalid hop count %d, must be between 1 and 255\"",
1027                         hops);
1028                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1029                 goto out;
1030         }
1031
1032         if (prio == -1) {
1033                 prio = 0;
1034         } else if (prio < 0) {
1035                 snprintf(err_str,
1036                          sizeof(err_str),
1037                         "\"invalid priority %d, must be greater than 0\"",
1038                         prio);
1039                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1040                 goto out;
1041         }
1042
1043         rc = lnet_expr2ips(gw, ip_list,
1044                            &ip2nets, &net, err_str);
1045         if (rc == LUSTRE_CFG_RC_LAST_ELEM)
1046                 rc = -1;
1047         else if (rc < LUSTRE_CFG_RC_NO_ERR)
1048                 goto out;
1049
1050         ip_idx = rc;
1051
1052         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
1053         data.cfg_net = rnet;
1054         data.cfg_config_u.cfg_route.rtr_hop = hops;
1055         data.cfg_config_u.cfg_route.rtr_priority = prio;
1056
1057         for (i = MAX_NUM_IPS - 1; i > ip_idx; i--) {
1058                 gateway_nid = LNET_MKNID(net, ip_list[i]);
1059                 if (gateway_nid == LNET_NID_ANY) {
1060                         snprintf(err_str,
1061                                 LNET_MAX_STR_LEN,
1062                                 "\"cannot form gateway NID: %u\"",
1063                                 ip_list[i]);
1064                         err_str[LNET_MAX_STR_LEN - 1] = '\0';
1065                         rc = LUSTRE_CFG_RC_BAD_PARAM;
1066                         goto out;
1067                 }
1068                 data.cfg_nid = gateway_nid;
1069
1070                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_ROUTE, &data);
1071                 if (rc != 0) {
1072                         rc = -errno;
1073                         snprintf(err_str,
1074                                 sizeof(err_str),
1075                                 "\"cannot add route: %s\"", strerror(errno));
1076                         goto out;
1077                 }
1078         }
1079 out:
1080         cYAML_build_error(rc, seq_no, ADD_CMD, "route", err_str, err_rc);
1081
1082         return rc;
1083 }
1084
1085 int lustre_lnet_del_route(char *nw, char *gw,
1086                           int seq_no, struct cYAML **err_rc)
1087 {
1088         struct lnet_ioctl_config_data data;
1089         lnet_nid_t gateway_nid;
1090         int rc = LUSTRE_CFG_RC_NO_ERR;
1091         __u32 rnet = LNET_NIDNET(LNET_NID_ANY);
1092         __u32 net = LNET_NIDNET(LNET_NID_ANY);
1093         char err_str[LNET_MAX_STR_LEN];
1094         int ip_idx, i;
1095         __u32 ip_list[MAX_NUM_IPS];
1096         struct lustre_lnet_ip2nets ip2nets;
1097
1098         /* initialize all lists */
1099         INIT_LIST_HEAD(&ip2nets.ip2nets_ip_ranges);
1100         INIT_LIST_HEAD(&ip2nets.ip2nets_net.network_on_rule);
1101         INIT_LIST_HEAD(&ip2nets.ip2nets_net.nw_intflist);
1102
1103         snprintf(err_str, sizeof(err_str), "\"Success\"");
1104
1105         if (nw == NULL || gw == NULL) {
1106                 snprintf(err_str,
1107                          sizeof(err_str),
1108                          "\"missing mandatory parameter in route delete: '%s'\"",
1109                          (nw == NULL && gw == NULL) ? "network, gateway" :
1110                          (nw == NULL) ? "network" : "gateway");
1111                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1112                 goto out;
1113         }
1114
1115         rnet = libcfs_str2net(nw);
1116         if (rnet == LNET_NIDNET(LNET_NID_ANY)) {
1117                 snprintf(err_str,
1118                          sizeof(err_str),
1119                          "\"cannot parse remote net '%s'\"", nw);
1120                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1121                 goto out;
1122         }
1123
1124         rc = lnet_expr2ips(gw, ip_list,
1125                            &ip2nets, &net, err_str);
1126         if (rc == LUSTRE_CFG_RC_LAST_ELEM)
1127                 rc = -1;
1128         else if (rc < LUSTRE_CFG_RC_NO_ERR)
1129                 goto out;
1130
1131         ip_idx = rc;
1132
1133         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
1134         data.cfg_net = rnet;
1135
1136         for (i = MAX_NUM_IPS - 1; i > ip_idx; i--) {
1137                 gateway_nid = LNET_MKNID(net, ip_list[i]);
1138                 if (gateway_nid == LNET_NID_ANY) {
1139                         snprintf(err_str,
1140                                 LNET_MAX_STR_LEN,
1141                                 "\"cannot form gateway NID: %u\"",
1142                                 ip_list[i]);
1143                         err_str[LNET_MAX_STR_LEN - 1] = '\0';
1144                         rc = LUSTRE_CFG_RC_BAD_PARAM;
1145                         goto out;
1146                 }
1147                 data.cfg_nid = gateway_nid;
1148
1149                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_ROUTE, &data);
1150                 if (rc != 0) {
1151                         rc = -errno;
1152                         snprintf(err_str,
1153                                 sizeof(err_str),
1154                                 "\"cannot delete route: %s\"", strerror(errno));
1155                         goto out;
1156                 }
1157         }
1158 out:
1159         cYAML_build_error(rc, seq_no, DEL_CMD, "route", err_str, err_rc);
1160
1161         return rc;
1162 }
1163
1164 int lustre_lnet_show_route(char *nw, char *gw, int hops, int prio, int detail,
1165                            int seq_no, struct cYAML **show_rc,
1166                            struct cYAML **err_rc, bool backup)
1167 {
1168         struct lnet_ioctl_config_data data;
1169         lnet_nid_t gateway_nid;
1170         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1171         int l_errno = 0;
1172         __u32 net = LNET_NIDNET(LNET_NID_ANY);
1173         int i;
1174         struct cYAML *root = NULL, *route = NULL, *item = NULL;
1175         struct cYAML *first_seq = NULL;
1176         char err_str[LNET_MAX_STR_LEN];
1177         bool exist = false;
1178
1179         snprintf(err_str, sizeof(err_str),
1180                  "\"out of memory\"");
1181
1182         if (nw != NULL) {
1183                 net = libcfs_str2net(nw);
1184                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
1185                         snprintf(err_str,
1186                                  sizeof(err_str),
1187                                  "\"cannot parse net '%s'\"", nw);
1188                         rc = LUSTRE_CFG_RC_BAD_PARAM;
1189                         goto out;
1190                 }
1191
1192         } else {
1193                 /* show all routes without filtering on net */
1194                 net = LNET_NIDNET(LNET_NID_ANY);
1195         }
1196
1197         if (gw != NULL) {
1198                 gateway_nid = libcfs_str2nid(gw);
1199                 if (gateway_nid == LNET_NID_ANY) {
1200                         snprintf(err_str,
1201                                  sizeof(err_str),
1202                                  "\"cannot parse gateway NID '%s'\"", gw);
1203                         rc = LUSTRE_CFG_RC_BAD_PARAM;
1204                         goto out;
1205                 }
1206         } else
1207                 /* show all routes with out filtering on gateway */
1208                 gateway_nid = LNET_NID_ANY;
1209
1210         if ((hops < 1 && hops != -1) || hops > 255) {
1211                 snprintf(err_str,
1212                          sizeof(err_str),
1213                          "\"invalid hop count %d, must be between 0 and 256\"",
1214                          hops);
1215                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1216                 goto out;
1217         }
1218
1219         /* create struct cYAML root object */
1220         root = cYAML_create_object(NULL, NULL);
1221         if (root == NULL)
1222                 goto out;
1223
1224         route = cYAML_create_seq(root, "route");
1225         if (route == NULL)
1226                 goto out;
1227
1228         for (i = 0;; i++) {
1229                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
1230                 data.cfg_count = i;
1231
1232                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_ROUTE, &data);
1233                 if (rc != 0) {
1234                         l_errno = errno;
1235                         break;
1236                 }
1237
1238                 /* filter on provided data */
1239                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
1240                     net != data.cfg_net)
1241                         continue;
1242
1243                 if (gateway_nid != LNET_NID_ANY &&
1244                     gateway_nid != data.cfg_nid)
1245                         continue;
1246
1247                 if (hops != -1 &&
1248                     hops != data.cfg_config_u.cfg_route.rtr_hop)
1249                         continue;
1250
1251                 if (prio != -1 &&
1252                     prio != data.cfg_config_u.cfg_route.rtr_priority)
1253                         continue;
1254
1255                 /* default rc to -1 incase we hit the goto */
1256                 rc = -1;
1257                 exist = true;
1258
1259                 item = cYAML_create_seq_item(route);
1260                 if (item == NULL)
1261                         goto out;
1262
1263                 if (first_seq == NULL)
1264                         first_seq = item;
1265
1266                 if (cYAML_create_string(item, "net",
1267                                         libcfs_net2str(data.cfg_net)) == NULL)
1268                         goto out;
1269
1270                 if (cYAML_create_string(item, "gateway",
1271                                         libcfs_nid2str(data.cfg_nid)) == NULL)
1272                         goto out;
1273
1274                 if (detail) {
1275                         if (cYAML_create_number(item, "hop",
1276                                                 (int) data.cfg_config_u.
1277                                                 cfg_route.rtr_hop) ==
1278                             NULL)
1279                                 goto out;
1280
1281                         if (cYAML_create_number(item, "priority",
1282                                                 data.cfg_config_u.
1283                                                 cfg_route.rtr_priority) == NULL)
1284                                 goto out;
1285
1286                         if (!backup &&
1287                             cYAML_create_string(item, "state",
1288                                                 data.cfg_config_u.cfg_route.
1289                                                         rtr_flags ?
1290                                                 "up" : "down") == NULL)
1291                                 goto out;
1292                 }
1293         }
1294
1295         /* print output iff show_rc is not provided */
1296         if (show_rc == NULL)
1297                 cYAML_print_tree(root);
1298
1299         if (l_errno != ENOENT) {
1300                 snprintf(err_str,
1301                          sizeof(err_str),
1302                          "\"cannot get routes: %s\"",
1303                          strerror(l_errno));
1304                 rc = -l_errno;
1305                 goto out;
1306         } else
1307                 rc = LUSTRE_CFG_RC_NO_ERR;
1308
1309         snprintf(err_str, sizeof(err_str), "\"success\"");
1310 out:
1311         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
1312                 cYAML_free_tree(root);
1313         } else if (show_rc != NULL && *show_rc != NULL) {
1314                 struct cYAML *show_node;
1315                 /* find the route node, if one doesn't exist then
1316                  * insert one.  Otherwise add to the one there
1317                  */
1318                 show_node = cYAML_get_object_item(*show_rc, "route");
1319                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
1320                         cYAML_insert_child(show_node, first_seq);
1321                         free(route);
1322                         free(root);
1323                 } else if (show_node == NULL) {
1324                         cYAML_insert_sibling((*show_rc)->cy_child,
1325                                                 route);
1326                         free(root);
1327                 } else {
1328                         cYAML_free_tree(root);
1329                 }
1330         } else {
1331                 *show_rc = root;
1332         }
1333
1334         cYAML_build_error(rc, seq_no, SHOW_CMD, "route", err_str, err_rc);
1335
1336         return rc;
1337 }
1338
1339 static int socket_intf_query(int request, char *intf,
1340                              struct ifreq *ifr)
1341 {
1342         int rc = 0;
1343         int sockfd;
1344
1345         if (strlen(intf) >= IFNAMSIZ || ifr == NULL)
1346                 return LUSTRE_CFG_RC_BAD_PARAM;
1347
1348         sockfd = socket(AF_INET, SOCK_DGRAM, 0);
1349         if (sockfd < 0)
1350                 return LUSTRE_CFG_RC_BAD_PARAM;
1351
1352         strcpy(ifr->ifr_name, intf);
1353         rc = ioctl(sockfd, request, ifr);
1354         if (rc != 0)
1355                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1356
1357         close(sockfd);
1358
1359         return rc;
1360 }
1361
1362 static int lustre_lnet_queryip(struct lnet_dlc_intf_descr *intf, __u32 *ip)
1363 {
1364         struct ifreq ifr;
1365         int rc;
1366
1367         memset(&ifr, 0, sizeof(ifr));
1368         rc = socket_intf_query(SIOCGIFFLAGS, intf->intf_name, &ifr);
1369         if (rc != 0)
1370                 return LUSTRE_CFG_RC_BAD_PARAM;
1371
1372         if ((ifr.ifr_flags & IFF_UP) == 0)
1373                 return LUSTRE_CFG_RC_BAD_PARAM;
1374
1375         memset(&ifr, 0, sizeof(ifr));
1376         rc = socket_intf_query(SIOCGIFADDR, intf->intf_name, &ifr);
1377         if (rc != 0)
1378                 return LUSTRE_CFG_RC_BAD_PARAM;
1379
1380         *ip = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
1381         *ip = bswap_32(*ip);
1382
1383         return LUSTRE_CFG_RC_NO_ERR;
1384 }
1385
1386 /*
1387  * for each interface in the array of interfaces find the IP address of
1388  * that interface, create its nid and add it to an array of NIDs.
1389  * Stop if any of the interfaces is down
1390  */
1391 static int lustre_lnet_intf2nids(struct lnet_dlc_network_descr *nw,
1392                                  lnet_nid_t **nids, __u32 *nnids,
1393                                  char *err_str, size_t str_len)
1394 {
1395         int i = 0, count = 0, rc;
1396         struct lnet_dlc_intf_descr *intf;
1397         char val[LNET_MAX_STR_LEN];
1398         __u32 ip;
1399         int gni_num;
1400
1401
1402         if (nw == NULL || nids == NULL) {
1403                 snprintf(err_str, str_len,
1404                          "\"unexpected parameters to lustre_lnet_intf2nids()\"");
1405                 err_str[str_len - 1] = '\0';
1406                 return LUSTRE_CFG_RC_BAD_PARAM;
1407         }
1408
1409         if (LNET_NETTYP(nw->nw_id) == GNILND) {
1410                 count = 1;
1411         } else {
1412                 list_for_each_entry(intf, &nw->nw_intflist, intf_on_network)
1413                         count++;
1414         }
1415
1416         *nids = calloc(count, sizeof(lnet_nid_t));
1417         if (*nids == NULL) {
1418                 snprintf(err_str, str_len,
1419                          "\"out of memory\"");
1420                 err_str[str_len - 1] = '\0';
1421                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1422         }
1423         /*
1424          * special case the GNI interface since it doesn't have an IP
1425          * address. The assumption is that there can only be one GNI
1426          * interface in the system. No interface name is provided.
1427          */
1428         if (LNET_NETTYP(nw->nw_id) == GNILND) {
1429                 rc = read_sysfs_file(gni_nid_path, "nid", val,
1430                                 1, sizeof(val));
1431                 if (rc) {
1432                         snprintf(err_str, str_len,
1433                                  "\"cannot read gni nid\"");
1434                         err_str[str_len - 1] = '\0';
1435                         goto failed;
1436                 }
1437                 gni_num = atoi(val);
1438
1439                 (*nids)[i] = LNET_MKNID(nw->nw_id, gni_num);
1440
1441                 goto out;
1442         }
1443
1444         /* look at the other interfaces */
1445         list_for_each_entry(intf, &nw->nw_intflist, intf_on_network) {
1446                 rc = lustre_lnet_queryip(intf, &ip);
1447                 if (rc != LUSTRE_CFG_RC_NO_ERR) {
1448                         snprintf(err_str, str_len,
1449                                  "\"couldn't query intf %s\"", intf->intf_name);
1450                         err_str[str_len - 1] = '\0';
1451                         goto failed;
1452                 }
1453                 (*nids)[i] = LNET_MKNID(nw->nw_id, ip);
1454                 i++;
1455         }
1456
1457 out:
1458         *nnids = count;
1459
1460         return 0;
1461
1462 failed:
1463         free(*nids);
1464         *nids = NULL;
1465         return rc;
1466 }
1467
1468 /*
1469  * called repeatedly until a match or no more ip range
1470  * What do you have?
1471  *      ip_range expression
1472  *      interface list with all the interface names.
1473  *      all the interfaces in the system.
1474  *
1475  *      try to match the ip_range expr to one of the interfaces' IPs in
1476  *      the system. If we hit a patch for an interface. Check if that
1477  *      interface name is in the list.
1478  *
1479  *      If there are more than one interface in the list, then make sure
1480  *      that the IPs for all of these interfaces match the ip ranges
1481  *      given.
1482  *
1483  *      for each interface in intf_list
1484  *              look up the intf name in ifa
1485  *              if not there then no match
1486  *              check ip obtained from ifa against a match to any of the
1487  *              ip_ranges given.
1488  *              If no match, then fail
1489  *
1490  *      The result is that all the interfaces have to match.
1491  */
1492 int lustre_lnet_match_ip_to_intf(struct ifaddrs *ifa,
1493                                  struct list_head *intf_list,
1494                                  struct list_head *ip_ranges)
1495 {
1496         int rc;
1497         __u32 ip;
1498         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1499         struct ifaddrs *ifaddr = ifa;
1500         struct lustre_lnet_ip_range_descr *ip_range;
1501         int family;
1502
1503         /*
1504          * if there are no explicit interfaces, and no ip ranges, then
1505          * configure the first tcp interface we encounter.
1506          */
1507         if (list_empty(intf_list) && list_empty(ip_ranges)) {
1508                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1509                         if (ifaddr->ifa_addr == NULL)
1510                                 continue;
1511
1512                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1513                                 continue;
1514
1515                         family = ifaddr->ifa_addr->sa_family;
1516                         if (family == AF_INET &&
1517                             strcmp(ifaddr->ifa_name, "lo") != 0) {
1518                                 rc = lustre_lnet_add_intf_descr
1519                                         (intf_list, ifaddr->ifa_name,
1520                                         strlen(ifaddr->ifa_name));
1521
1522                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
1523                                         return rc;
1524
1525                                 return LUSTRE_CFG_RC_MATCH;
1526                         }
1527                 }
1528                 return LUSTRE_CFG_RC_NO_MATCH;
1529         }
1530
1531         /*
1532          * First interface which matches an IP pattern will be used
1533          */
1534         if (list_empty(intf_list)) {
1535                 /*
1536                  * no interfaces provided in the rule, but an ip range is
1537                  * provided, so try and match an interface to the ip
1538                  * range.
1539                  */
1540                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1541                         if (ifaddr->ifa_addr == NULL)
1542                                 continue;
1543
1544                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1545                                 continue;
1546
1547                         family = ifaddr->ifa_addr->sa_family;
1548                         if (family == AF_INET) {
1549                                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->
1550                                         sin_addr.s_addr;
1551
1552                                 list_for_each_entry(ip_range, ip_ranges,
1553                                                     ipr_entry) {
1554                                         rc = cfs_ip_addr_match(bswap_32(ip),
1555                                                         &ip_range->ipr_expr);
1556                                         if (!rc)
1557                                                 continue;
1558
1559                                         rc = lustre_lnet_add_intf_descr
1560                                           (intf_list, ifaddr->ifa_name,
1561                                            strlen(ifaddr->ifa_name));
1562
1563                                         if (rc != LUSTRE_CFG_RC_NO_ERR)
1564                                                 return rc;
1565                                 }
1566                         }
1567                 }
1568
1569                 if (!list_empty(intf_list))
1570                         return LUSTRE_CFG_RC_MATCH;
1571
1572                 return LUSTRE_CFG_RC_NO_MATCH;
1573         }
1574
1575         /*
1576          * If an interface is explicitly specified the ip-range might or
1577          * might not be specified. if specified the interface needs to match the
1578          * ip-range. If no ip-range then the interfaces are
1579          * automatically matched if they are all up.
1580          * If > 1 interfaces all the interfaces must match for the NI to
1581          * be configured.
1582          */
1583         list_for_each_entry_safe(intf_descr, tmp, intf_list, intf_on_network) {
1584                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1585                         if (ifaddr->ifa_addr == NULL)
1586                                 continue;
1587
1588                         family = ifaddr->ifa_addr->sa_family;
1589                         if (family == AF_INET &&
1590                             strcmp(intf_descr->intf_name,
1591                                    ifaddr->ifa_name) == 0)
1592                                 break;
1593                 }
1594
1595                 if (ifaddr == NULL) {
1596                         list_del(&intf_descr->intf_on_network);
1597                         free_intf_descr(intf_descr);
1598                         continue;
1599                 }
1600
1601                 if ((ifaddr->ifa_flags & IFF_UP) == 0) {
1602                         list_del(&intf_descr->intf_on_network);
1603                         free_intf_descr(intf_descr);
1604                         continue;
1605                 }
1606
1607                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->sin_addr.s_addr;
1608
1609                 rc = 1;
1610                 list_for_each_entry(ip_range, ip_ranges, ipr_entry) {
1611                         rc = cfs_ip_addr_match(bswap_32(ip), &ip_range->ipr_expr);
1612                         if (rc)
1613                                 break;
1614                 }
1615
1616                 if (!rc) {
1617                         /* no match for this interface */
1618                         list_del(&intf_descr->intf_on_network);
1619                         free_intf_descr(intf_descr);
1620                 }
1621         }
1622
1623         return LUSTRE_CFG_RC_MATCH;
1624 }
1625
1626 static int lustre_lnet_resolve_ip2nets_rule(struct lustre_lnet_ip2nets *ip2nets,
1627                                             lnet_nid_t **nids, __u32 *nnids,
1628                                             char *err_str, size_t str_len)
1629 {
1630         struct ifaddrs *ifa;
1631         int rc = LUSTRE_CFG_RC_NO_ERR;
1632
1633         rc = getifaddrs(&ifa);
1634         if (rc < 0) {
1635                 snprintf(err_str, str_len,
1636                          "\"failed to get interface addresses: %d\"", -errno);
1637                 err_str[str_len - 1] = '\0';
1638                 return -errno;
1639         }
1640
1641         rc = lustre_lnet_match_ip_to_intf(ifa,
1642                                           &ip2nets->ip2nets_net.nw_intflist,
1643                                           &ip2nets->ip2nets_ip_ranges);
1644         if (rc != LUSTRE_CFG_RC_MATCH) {
1645                 snprintf(err_str, str_len,
1646                          "\"couldn't match ip to existing interfaces\"");
1647                 err_str[str_len - 1] = '\0';
1648                 freeifaddrs(ifa);
1649                 return rc;
1650         }
1651
1652         rc = lustre_lnet_intf2nids(&ip2nets->ip2nets_net, nids, nnids,
1653                                    err_str, sizeof(err_str));
1654         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1655                 *nids = NULL;
1656                 *nnids = 0;
1657         }
1658
1659         freeifaddrs(ifa);
1660
1661         return rc;
1662 }
1663
1664 static int
1665 lustre_lnet_ioctl_config_ni(struct list_head *intf_list,
1666                             struct lnet_ioctl_config_lnd_tunables *tunables,
1667                             struct cfs_expr_list *global_cpts,
1668                             lnet_nid_t *nids, char *err_str)
1669 {
1670         char *data;
1671         struct lnet_ioctl_config_ni *conf;
1672         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1673         int rc = LUSTRE_CFG_RC_NO_ERR, i = 0;
1674         size_t len;
1675         int count;
1676         struct lnet_dlc_intf_descr *intf_descr;
1677         __u32 *cpt_array;
1678         struct cfs_expr_list *cpt_expr;
1679
1680         list_for_each_entry(intf_descr, intf_list,
1681                             intf_on_network) {
1682                 if (tunables != NULL)
1683                         len = sizeof(struct lnet_ioctl_config_ni) +
1684                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1685                 else
1686                         len = sizeof(struct lnet_ioctl_config_ni);
1687
1688                 data = calloc(1, len);
1689                 if (!data)
1690                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1691                 conf = (struct lnet_ioctl_config_ni*) data;
1692                 if (tunables != NULL)
1693                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1694                                 conf->lic_bulk;
1695
1696                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1697                 conf->lic_cfg_hdr.ioc_len = len;
1698                 conf->lic_nid = nids[i];
1699                 strncpy(conf->lic_ni_intf[0], intf_descr->intf_name,
1700                         LNET_MAX_STR_LEN);
1701
1702                 if (intf_descr->cpt_expr != NULL)
1703                         cpt_expr = intf_descr->cpt_expr;
1704                 else if (global_cpts != NULL)
1705                         cpt_expr = global_cpts;
1706                 else
1707                         cpt_expr = NULL;
1708
1709                 if (cpt_expr != NULL) {
1710                         count = cfs_expr_list_values(cpt_expr,
1711                                                      LNET_MAX_SHOW_NUM_CPT,
1712                                                      &cpt_array);
1713                         if (count > 0) {
1714                                 memcpy(conf->lic_cpts, cpt_array,
1715                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1716                                 free(cpt_array);
1717                         } else {
1718                                 count = 0;
1719                         }
1720                 } else {
1721                         count = 0;
1722                 }
1723
1724                 conf->lic_ncpts = count;
1725
1726                 if (tunables != NULL)
1727                         memcpy(tun, tunables, sizeof(*tunables));
1728
1729                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1730                 if (rc < 0) {
1731                         rc = -errno;
1732                         snprintf(err_str,
1733                                  LNET_MAX_STR_LEN,
1734                                  "\"cannot add network: %s\"", strerror(errno));
1735                         free(data);
1736                         return rc;
1737                 }
1738                 free(data);
1739                 i++;
1740         }
1741
1742         return LUSTRE_CFG_RC_NO_ERR;
1743 }
1744
1745 int
1746 lustre_lnet_config_ip2nets(struct lustre_lnet_ip2nets *ip2nets,
1747                            struct lnet_ioctl_config_lnd_tunables *tunables,
1748                            struct cfs_expr_list *global_cpts,
1749                            int seq_no, struct cYAML **err_rc)
1750 {
1751         lnet_nid_t *nids = NULL;
1752         __u32 nnids = 0;
1753         int rc;
1754         char err_str[LNET_MAX_STR_LEN];
1755
1756         snprintf(err_str, sizeof(err_str), "\"success\"");
1757
1758         if (!ip2nets) {
1759                 snprintf(err_str,
1760                          sizeof(err_str),
1761                          "\"incomplete ip2nets information\"");
1762                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1763                 goto out;
1764         }
1765
1766         /*
1767          * call below function to resolve the rules into a list of nids.
1768          * The memory is allocated in that function then freed here when
1769          * it's no longer needed.
1770          */
1771         rc = lustre_lnet_resolve_ip2nets_rule(ip2nets, &nids, &nnids, err_str,
1772                                               sizeof(err_str));
1773         if (rc != LUSTRE_CFG_RC_NO_ERR && rc != LUSTRE_CFG_RC_MATCH)
1774                 goto out;
1775
1776         if (list_empty(&ip2nets->ip2nets_net.nw_intflist)) {
1777                 snprintf(err_str, sizeof(err_str),
1778                          "\"no interfaces match ip2nets rules\"");
1779                 goto free_nids_out;
1780         }
1781
1782         rc = lustre_lnet_ioctl_config_ni(&ip2nets->ip2nets_net.nw_intflist,
1783                                          tunables, global_cpts, nids,
1784                                          err_str);
1785
1786 free_nids_out:
1787         free(nids);
1788
1789 out:
1790         cYAML_build_error(rc, seq_no, ADD_CMD, "ip2nets", err_str, err_rc);
1791         return rc;
1792 }
1793
1794 int lustre_lnet_config_ni(struct lnet_dlc_network_descr *nw_descr,
1795                           struct cfs_expr_list *global_cpts,
1796                           char *ip2net,
1797                           struct lnet_ioctl_config_lnd_tunables *tunables,
1798                           int seq_no, struct cYAML **err_rc)
1799 {
1800         char *data = NULL;
1801         struct lnet_ioctl_config_ni *conf;
1802         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1803         char buf[LNET_MAX_STR_LEN];
1804         int rc = LUSTRE_CFG_RC_NO_ERR;
1805         char err_str[LNET_MAX_STR_LEN];
1806         lnet_nid_t *nids = NULL;
1807         __u32 nnids = 0;
1808         size_t len;
1809         int count;
1810         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1811         __u32 *cpt_array;
1812
1813         snprintf(err_str, sizeof(err_str), "\"success\"");
1814
1815         if (ip2net == NULL && (nw_descr == NULL || nw_descr->nw_id == 0 ||
1816             (list_empty(&nw_descr->nw_intflist) &&
1817              LNET_NETTYP(nw_descr->nw_id) != GNILND))) {
1818                 snprintf(err_str,
1819                          sizeof(err_str),
1820                          "\"missing mandatory parameters in NI config: '%s'\"",
1821                          (nw_descr == NULL) ? "network , interface" :
1822                          (nw_descr->nw_id == 0) ? "network" : "interface");
1823                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1824                 goto out;
1825         }
1826
1827         if (ip2net != NULL && strlen(ip2net) >= sizeof(buf)) {
1828                 snprintf(err_str,
1829                          sizeof(err_str),
1830                          "\"ip2net string too long %d\"",
1831                                 (int)strlen(ip2net));
1832                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1833                 goto out;
1834         }
1835
1836         if (ip2net != NULL) {
1837                 if (tunables != NULL)
1838                         len = sizeof(struct lnet_ioctl_config_ni) +
1839                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1840                 else
1841                         len = sizeof(struct lnet_ioctl_config_ni);
1842                 data = calloc(1, len);
1843                 if (!data) {
1844                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1845                         goto out;
1846                 }
1847                 conf = (struct lnet_ioctl_config_ni*) data;
1848                 if (tunables != NULL)
1849                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1850                                 (data + sizeof(*conf));
1851
1852                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1853                 conf->lic_cfg_hdr.ioc_len = len;
1854                 strncpy(conf->lic_legacy_ip2nets, ip2net,
1855                         LNET_MAX_STR_LEN);
1856
1857                 if (global_cpts != NULL) {
1858                         count = cfs_expr_list_values(global_cpts,
1859                                                      LNET_MAX_SHOW_NUM_CPT,
1860                                                      &cpt_array);
1861                         if (count > 0) {
1862                                 memcpy(conf->lic_cpts, cpt_array,
1863                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1864                                 free(cpt_array);
1865                         } else {
1866                                 count = 0;
1867                         }
1868                 } else {
1869                         count = 0;
1870                 }
1871
1872                 conf->lic_ncpts = count;
1873
1874                 if (tunables != NULL)
1875                         memcpy(tun, tunables, sizeof(*tunables));
1876
1877                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1878                 if (rc < 0) {
1879                         rc = -errno;
1880                         snprintf(err_str,
1881                                 sizeof(err_str),
1882                                 "\"cannot add network: %s\"", strerror(errno));
1883                         goto out;
1884                 }
1885
1886                 goto out;
1887         }
1888
1889         if (LNET_NETTYP(nw_descr->nw_id) == LOLND) {
1890                 rc = LUSTRE_CFG_RC_NO_ERR;
1891                 goto out;
1892         }
1893
1894         if (nw_descr->nw_id == LNET_NIDNET(LNET_NID_ANY)) {
1895                 snprintf(err_str,
1896                         sizeof(err_str),
1897                         "\"cannot parse net '%s'\"",
1898                         libcfs_net2str(nw_descr->nw_id));
1899                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1900                 goto out;
1901         }
1902
1903         /*
1904          * special case the GNI since no interface name is expected
1905          */
1906         if (list_empty(&nw_descr->nw_intflist) &&
1907             (LNET_NETTYP(nw_descr->nw_id) != GNILND)) {
1908                 snprintf(err_str,
1909                         sizeof(err_str),
1910                         "\"no interface name provided\"");
1911                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1912                 goto out;
1913         }
1914
1915         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1916                                    err_str, sizeof(err_str));
1917         if (rc != 0) {
1918                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1919                 goto out;
1920         }
1921
1922         rc = lustre_lnet_ioctl_config_ni(&nw_descr->nw_intflist,
1923                                          tunables, global_cpts, nids,
1924                                          err_str);
1925
1926 out:
1927         if (nw_descr != NULL) {
1928                 list_for_each_entry_safe(intf_descr, tmp,
1929                                          &nw_descr->nw_intflist,
1930                                          intf_on_network) {
1931                         list_del(&intf_descr->intf_on_network);
1932                         free_intf_descr(intf_descr);
1933                 }
1934         }
1935
1936         cYAML_build_error(rc, seq_no, ADD_CMD, "net", err_str, err_rc);
1937
1938         if (nids)
1939                 free(nids);
1940
1941         if (data)
1942                 free(data);
1943
1944         return rc;
1945 }
1946
1947 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw_descr,
1948                        int seq_no, struct cYAML **err_rc)
1949 {
1950         struct lnet_ioctl_config_ni data;
1951         int rc = LUSTRE_CFG_RC_NO_ERR, i;
1952         char err_str[LNET_MAX_STR_LEN];
1953         lnet_nid_t *nids = NULL;
1954         __u32 nnids = 0;
1955         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1956
1957         snprintf(err_str, sizeof(err_str), "\"success\"");
1958
1959         if (nw_descr == NULL || nw_descr->nw_id == 0) {
1960                 snprintf(err_str,
1961                          sizeof(err_str),
1962                          "\"missing mandatory parameter in deleting NI: '%s'\"",
1963                          (nw_descr == NULL) ? "network , interface" :
1964                          (nw_descr->nw_id == 0) ? "network" : "interface");
1965                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1966                 goto out;
1967         }
1968
1969         if (LNET_NETTYP(nw_descr->nw_id) == LOLND)
1970                 return LUSTRE_CFG_RC_NO_ERR;
1971
1972         if (nw_descr->nw_id == LNET_NIDNET(LNET_NID_ANY)) {
1973                 snprintf(err_str,
1974                          sizeof(err_str),
1975                          "\"cannot parse net '%s'\"",
1976                          libcfs_net2str(nw_descr->nw_id));
1977                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1978                 goto out;
1979         }
1980
1981         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1982                                    err_str, sizeof(err_str));
1983         if (rc != 0) {
1984                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1985                 goto out;
1986         }
1987
1988         /*
1989          * no interfaces just the nw_id is specified
1990          */
1991         if (nnids == 0) {
1992                 nids = calloc(1, sizeof(*nids));
1993                 if (nids == NULL) {
1994                         snprintf(err_str, sizeof(err_str),
1995                                 "\"out of memory\"");
1996                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1997                         goto out;
1998                 }
1999                 nids[0] = LNET_MKNID(nw_descr->nw_id, 0);
2000                 nnids = 1;
2001         }
2002
2003         for (i = 0; i < nnids; i++) {
2004                 LIBCFS_IOC_INIT_V2(data, lic_cfg_hdr);
2005                 data.lic_nid = nids[i];
2006
2007                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_LOCAL_NI, &data);
2008                 if (rc < 0) {
2009                         rc = -errno;
2010                         snprintf(err_str,
2011                                 sizeof(err_str),
2012                                 "\"cannot del network: %s\"", strerror(errno));
2013                 }
2014         }
2015
2016         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
2017                                  intf_on_network) {
2018                 list_del(&intf_descr->intf_on_network);
2019                 free_intf_descr(intf_descr);
2020         }
2021
2022 out:
2023         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
2024
2025         if (nids != NULL)
2026                 free(nids);
2027
2028         return rc;
2029 }
2030
2031 static bool
2032 add_msg_stats_to_yaml_blk(struct cYAML *yaml,
2033                           struct lnet_ioctl_comm_count *counts)
2034 {
2035         if (cYAML_create_number(yaml, "put",
2036                                 counts->ico_put_count)
2037                                         == NULL)
2038                 return false;
2039         if (cYAML_create_number(yaml, "get",
2040                                 counts->ico_get_count)
2041                                         == NULL)
2042                 return false;
2043         if (cYAML_create_number(yaml, "reply",
2044                                 counts->ico_reply_count)
2045                                         == NULL)
2046                 return false;
2047         if (cYAML_create_number(yaml, "ack",
2048                                 counts->ico_ack_count)
2049                                         == NULL)
2050                 return false;
2051         if (cYAML_create_number(yaml, "hello",
2052                                 counts->ico_hello_count)
2053                                         == NULL)
2054                 return false;
2055
2056         return true;
2057 }
2058
2059 static struct lnet_ioctl_comm_count *
2060 get_counts(struct lnet_ioctl_element_msg_stats *msg_stats, int idx)
2061 {
2062         if (idx == 0)
2063                 return &msg_stats->im_send_stats;
2064         if (idx == 1)
2065                 return &msg_stats->im_recv_stats;
2066         if (idx == 2)
2067                 return &msg_stats->im_drop_stats;
2068
2069         return NULL;
2070 }
2071
2072 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
2073                          struct cYAML **show_rc, struct cYAML **err_rc,
2074                          bool backup)
2075 {
2076         char *buf;
2077         struct lnet_ioctl_config_ni *ni_data;
2078         struct lnet_ioctl_config_lnd_tunables *lnd;
2079         struct lnet_ioctl_element_stats *stats;
2080         struct lnet_ioctl_element_msg_stats msg_stats;
2081         __u32 net = LNET_NIDNET(LNET_NID_ANY);
2082         __u32 prev_net = LNET_NIDNET(LNET_NID_ANY);
2083         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
2084         int l_errno = 0;
2085         struct cYAML *root = NULL, *tunables = NULL,
2086                 *net_node = NULL, *interfaces = NULL,
2087                 *item = NULL, *first_seq = NULL,
2088                 *tmp = NULL, *statistics = NULL;
2089         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
2090         char str_buf[str_buf_len];
2091         char *pos;
2092         char err_str[LNET_MAX_STR_LEN];
2093         bool exist = false, new_net = true;
2094         int net_num = 0;
2095         size_t buf_size = sizeof(*ni_data) + sizeof(*lnd) + sizeof(*stats);
2096
2097         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2098
2099         buf = calloc(1, buf_size);
2100         if (buf == NULL)
2101                 goto out;
2102
2103         ni_data = (struct lnet_ioctl_config_ni *)buf;
2104
2105         if (nw != NULL) {
2106                 net = libcfs_str2net(nw);
2107                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
2108                         snprintf(err_str,
2109                                  sizeof(err_str),
2110                                  "\"cannot parse net '%s'\"", nw);
2111                         rc = LUSTRE_CFG_RC_BAD_PARAM;
2112                         goto out;
2113                 }
2114         }
2115
2116         root = cYAML_create_object(NULL, NULL);
2117         if (root == NULL)
2118                 goto out;
2119
2120         net_node = cYAML_create_seq(root, "net");
2121         if (net_node == NULL)
2122                 goto out;
2123
2124         for (i = 0;; i++) {
2125                 pos = str_buf;
2126                 __u32 rc_net;
2127
2128                 memset(buf, 0, buf_size);
2129
2130                 LIBCFS_IOC_INIT_V2(*ni_data, lic_cfg_hdr);
2131                 /*
2132                  * set the ioc_len to the proper value since INIT assumes
2133                  * size of data
2134                  */
2135                 ni_data->lic_cfg_hdr.ioc_len = buf_size;
2136                 ni_data->lic_idx = i;
2137
2138                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LOCAL_NI, ni_data);
2139                 if (rc != 0) {
2140                         l_errno = errno;
2141                         break;
2142                 }
2143
2144                 rc_net = LNET_NIDNET(ni_data->lic_nid);
2145
2146                 /* filter on provided data */
2147                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
2148                     net != rc_net)
2149                         continue;
2150
2151                 /* if we're backing up don't store lo */
2152                 if (backup && LNET_NETTYP(rc_net) == LOLND)
2153                         continue;
2154
2155                 /* default rc to -1 in case we hit the goto */
2156                 rc = -1;
2157                 exist = true;
2158
2159                 stats = (struct lnet_ioctl_element_stats *)ni_data->lic_bulk;
2160                 lnd = (struct lnet_ioctl_config_lnd_tunables *)
2161                         (ni_data->lic_bulk + sizeof(*stats));
2162
2163                 if (rc_net != prev_net) {
2164                         prev_net = rc_net;
2165                         new_net = true;
2166                         net_num++;
2167                 }
2168
2169                 if (new_net) {
2170                         if (!cYAML_create_string(net_node, "net type",
2171                                                  libcfs_net2str(rc_net)))
2172                                 goto out;
2173
2174                         tmp = cYAML_create_seq(net_node, "local NI(s)");
2175                         if (tmp == NULL)
2176                                 goto out;
2177                         new_net = false;
2178                 }
2179
2180                 /* create the tree to be printed. */
2181                 item = cYAML_create_seq_item(tmp);
2182                 if (item == NULL)
2183                         goto out;
2184
2185                 if (first_seq == NULL)
2186                         first_seq = item;
2187
2188                 if (!backup &&
2189                     cYAML_create_string(item, "nid",
2190                                         libcfs_nid2str(ni_data->lic_nid)) == NULL)
2191                         goto out;
2192
2193                 if (!backup &&
2194                     cYAML_create_string(item,
2195                                         "status",
2196                                         (ni_data->lic_status ==
2197                                           LNET_NI_STATUS_UP) ?
2198                                             "up" : "down") == NULL)
2199                         goto out;
2200
2201                 /* don't add interfaces unless there is at least one
2202                  * interface */
2203                 if (strlen(ni_data->lic_ni_intf[0]) > 0) {
2204                         interfaces = cYAML_create_object(item, "interfaces");
2205                         if (interfaces == NULL)
2206                                 goto out;
2207
2208                         for (j = 0; j < LNET_INTERFACES_NUM; j++) {
2209                                 if (strlen(ni_data->lic_ni_intf[j]) > 0) {
2210                                         snprintf(str_buf,
2211                                                  sizeof(str_buf), "%d", j);
2212                                         if (cYAML_create_string(interfaces,
2213                                                 str_buf,
2214                                                 ni_data->lic_ni_intf[j]) ==
2215                                                         NULL)
2216                                                 goto out;
2217                                 }
2218                         }
2219                 }
2220
2221                 if (detail) {
2222                         char *limit;
2223                         int k;
2224
2225                         if (backup)
2226                                 goto continue_without_msg_stats;
2227
2228                         statistics = cYAML_create_object(item, "statistics");
2229                         if (statistics == NULL)
2230                                 goto out;
2231
2232                         if (cYAML_create_number(statistics, "send_count",
2233                                                 stats->iel_send_count)
2234                                                         == NULL)
2235                                 goto out;
2236
2237                         if (cYAML_create_number(statistics, "recv_count",
2238                                                 stats->iel_recv_count)
2239                                                         == NULL)
2240                                 goto out;
2241
2242                         if (cYAML_create_number(statistics, "drop_count",
2243                                                 stats->iel_drop_count)
2244                                                         == NULL)
2245                                 goto out;
2246
2247                         if (detail < 2)
2248                                 goto continue_without_msg_stats;
2249
2250                         LIBCFS_IOC_INIT_V2(msg_stats, im_hdr);
2251                         msg_stats.im_hdr.ioc_len = sizeof(msg_stats);
2252                         msg_stats.im_idx = i;
2253
2254                         rc = l_ioctl(LNET_DEV_ID,
2255                                      IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS,
2256                                      &msg_stats);
2257                         if (rc != 0) {
2258                                 l_errno = errno;
2259                                 goto continue_without_msg_stats;
2260                         }
2261
2262                         for (k = 0; k < 3; k++) {
2263                                 struct lnet_ioctl_comm_count *counts;
2264                                 struct cYAML *msg_statistics = NULL;
2265
2266                                 msg_statistics = cYAML_create_object(item,
2267                                                  (char *)gmsg_stat_names[k]);
2268                                 if (msg_statistics == NULL)
2269                                         goto out;
2270
2271                                 counts = get_counts(&msg_stats, k);
2272                                 if (counts == NULL)
2273                                         goto out;
2274
2275                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
2276                                                                counts))
2277                                         goto out;
2278                         }
2279
2280 continue_without_msg_stats:
2281                         tunables = cYAML_create_object(item, "tunables");
2282                         if (!tunables)
2283                                 goto out;
2284
2285                         rc = lustre_net_show_tunables(tunables, &lnd->lt_cmn);
2286                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2287                                 goto out;
2288
2289                         rc = lustre_ni_show_tunables(tunables, LNET_NETTYP(rc_net),
2290                                                      &lnd->lt_tun);
2291                         if (rc != LUSTRE_CFG_RC_NO_ERR &&
2292                             rc != LUSTRE_CFG_RC_NO_MATCH)
2293                                 goto out;
2294
2295                         if (rc != LUSTRE_CFG_RC_NO_MATCH) {
2296                                 tunables = cYAML_create_object(item,
2297                                                                "lnd tunables");
2298                                 if (tunables == NULL)
2299                                         goto out;
2300                         }
2301
2302                         if (!backup &&
2303                             cYAML_create_number(item, "dev cpt",
2304                                                 ni_data->lic_dev_cpt) == NULL)
2305                                 goto out;
2306
2307                         if (!backup &&
2308                             cYAML_create_number(item, "tcp bonding",
2309                                                 ni_data->lic_tcp_bonding)
2310                                                         == NULL)
2311                                 goto out;
2312
2313                         /* out put the CPTs in the format: "[x,x,x,...]" */
2314                         limit = str_buf + str_buf_len - 3;
2315                         pos += snprintf(pos, limit - pos, "\"[");
2316                         for (j = 0 ; ni_data->lic_ncpts >= 1 &&
2317                                 j < ni_data->lic_ncpts &&
2318                                 pos < limit; j++) {
2319                                 pos += snprintf(pos, limit - pos,
2320                                                 "%d", ni_data->lic_cpts[j]);
2321                                 if ((j + 1) < ni_data->lic_ncpts)
2322                                         pos += snprintf(pos, limit - pos, ",");
2323                         }
2324                         pos += snprintf(pos, 3, "]\"");
2325
2326                         if (ni_data->lic_ncpts >= 1 &&
2327                             cYAML_create_string(item, "CPT",
2328                                                 str_buf) == NULL)
2329                                 goto out;
2330                 }
2331         }
2332
2333         /* Print out the net information only if show_rc is not provided */
2334         if (show_rc == NULL)
2335                 cYAML_print_tree(root);
2336
2337         if (l_errno != ENOENT) {
2338                 snprintf(err_str,
2339                          sizeof(err_str),
2340                          "\"cannot get networks: %s\"",
2341                          strerror(l_errno));
2342                 rc = -l_errno;
2343                 goto out;
2344         } else
2345                 rc = LUSTRE_CFG_RC_NO_ERR;
2346
2347         snprintf(err_str, sizeof(err_str), "\"success\"");
2348 out:
2349         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2350                 cYAML_free_tree(root);
2351         } else if (show_rc != NULL && *show_rc != NULL) {
2352                 struct cYAML *show_node;
2353                 /* find the net node, if one doesn't exist
2354                  * then insert one.  Otherwise add to the one there
2355                  */
2356                 show_node = cYAML_get_object_item(*show_rc, "net");
2357                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2358                         cYAML_insert_child(show_node, first_seq);
2359                         free(net_node);
2360                         free(root);
2361                 } else if (show_node == NULL) {
2362                         cYAML_insert_sibling((*show_rc)->cy_child,
2363                                                 net_node);
2364                         free(root);
2365                 } else {
2366                         cYAML_free_tree(root);
2367                 }
2368         } else {
2369                 *show_rc = root;
2370         }
2371
2372         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
2373
2374         return rc;
2375 }
2376
2377 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
2378 {
2379         struct lnet_ioctl_config_data data;
2380         int rc = LUSTRE_CFG_RC_NO_ERR;
2381         char err_str[LNET_MAX_STR_LEN];
2382
2383         snprintf(err_str, sizeof(err_str), "\"success\"");
2384
2385         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2386         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
2387
2388         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
2389         if (rc != 0) {
2390                 rc = -errno;
2391                 snprintf(err_str,
2392                          sizeof(err_str),
2393                          "\"cannot %s routing %s\"",
2394                          (enable) ? "enable" : "disable", strerror(errno));
2395                 goto out;
2396         }
2397
2398 out:
2399         cYAML_build_error(rc, seq_no,
2400                          (enable) ? ADD_CMD : DEL_CMD,
2401                          "routing", err_str, err_rc);
2402
2403         return rc;
2404 }
2405
2406 int ioctl_set_value(__u32 val, int ioc, char *name,
2407                     int seq_no, struct cYAML **err_rc)
2408 {
2409         struct lnet_ioctl_set_value data;
2410         int rc = LUSTRE_CFG_RC_NO_ERR;
2411         char err_str[LNET_MAX_STR_LEN];
2412
2413         snprintf(err_str, sizeof(err_str), "\"success\"");
2414
2415         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2416         data.sv_value = val;
2417
2418         rc = l_ioctl(LNET_DEV_ID, ioc , &data);
2419         if (rc != 0) {
2420                 rc = -errno;
2421                 snprintf(err_str,
2422                          sizeof(err_str),
2423                          "\"cannot configure %s to %d: %s\"", name,
2424                          val, strerror(errno));
2425         }
2426
2427         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
2428
2429         return rc;
2430 }
2431
2432 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc)
2433 {
2434         int rc = LUSTRE_CFG_RC_NO_ERR;
2435         char err_str[LNET_MAX_STR_LEN];
2436         char val[LNET_MAX_STR_LEN];
2437
2438         snprintf(err_str, sizeof(err_str), "\"success\"");
2439
2440         snprintf(val, sizeof(val), "%d", timeout);
2441
2442         rc = write_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
2443                               1, strlen(val) + 1);
2444         if (rc)
2445                 snprintf(err_str, sizeof(err_str),
2446                          "\"cannot configure transaction timeout: %s\"",
2447                          strerror(errno));
2448
2449         cYAML_build_error(rc, seq_no, ADD_CMD, "transaction_timeout", err_str, err_rc);
2450
2451         return rc;
2452 }
2453
2454 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc)
2455 {
2456         int rc = LUSTRE_CFG_RC_NO_ERR;
2457         char err_str[LNET_MAX_STR_LEN];
2458         char val[LNET_MAX_STR_LEN];
2459
2460         snprintf(err_str, sizeof(err_str), "\"success\"");
2461
2462         snprintf(val, sizeof(val), "%d", count);
2463
2464         rc = write_sysfs_file(modparam_path, "lnet_retry_count", val,
2465                               1, strlen(val) + 1);
2466         if (rc)
2467                 snprintf(err_str, sizeof(err_str),
2468                          "\"cannot configure retry count: %s\"",
2469                          strerror(errno));
2470
2471         cYAML_build_error(rc, seq_no, ADD_CMD, "retry_count", err_str, err_rc);
2472
2473         return rc;
2474 }
2475
2476 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc)
2477 {
2478         int rc = LUSTRE_CFG_RC_NO_ERR;
2479         char err_str[LNET_MAX_STR_LEN];
2480         char val[LNET_MAX_STR_LEN];
2481
2482         snprintf(err_str, sizeof(err_str), "\"success\"");
2483
2484         snprintf(val, sizeof(val), "%d", max);
2485
2486         rc = write_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2487                               1, strlen(val) + 1);
2488         if (rc)
2489                 snprintf(err_str, sizeof(err_str),
2490                          "\"cannot configure max interfaces: %s\"",
2491                          strerror(errno));
2492
2493         cYAML_build_error(rc, seq_no, ADD_CMD, "max_interfaces", err_str, err_rc);
2494
2495         return rc;
2496 }
2497
2498 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc)
2499 {
2500         int rc = LUSTRE_CFG_RC_NO_ERR;
2501         char err_str[LNET_MAX_STR_LEN];
2502         char val[LNET_MAX_STR_LEN];
2503
2504         snprintf(err_str, sizeof(err_str), "\"success\"");
2505
2506         snprintf(val, sizeof(val), "%u", (enable) ? 0 : 1);
2507
2508         rc = write_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2509                               1, strlen(val) + 1);
2510         if (rc)
2511                 snprintf(err_str, sizeof(err_str),
2512                          "\"cannot configure discovery: %s\"",
2513                          strerror(errno));
2514
2515         cYAML_build_error(rc, seq_no, ADD_CMD, "discovery", err_str, err_rc);
2516
2517         return rc;
2518
2519 }
2520
2521 int lustre_lnet_config_numa_range(int range, int seq_no, struct cYAML **err_rc)
2522 {
2523         return ioctl_set_value(range, IOC_LIBCFS_SET_NUMA_RANGE,
2524                                "numa_range", seq_no, err_rc);
2525 }
2526
2527 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
2528                                struct cYAML **err_rc)
2529 {
2530         struct lnet_ioctl_config_data data;
2531         int rc = LUSTRE_CFG_RC_NO_ERR;
2532         char err_str[LNET_MAX_STR_LEN];
2533
2534         snprintf(err_str, sizeof(err_str), "\"success\"");
2535
2536         /* -1 indicates to ignore changes to this field */
2537         if (tiny < -1 || small < -1 || large < -1) {
2538                 snprintf(err_str,
2539                          sizeof(err_str),
2540                          "\"tiny, small and large must be >= 0\"");
2541                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
2542                 goto out;
2543         }
2544
2545         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2546         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
2547         data.cfg_config_u.cfg_buffers.buf_small = small;
2548         data.cfg_config_u.cfg_buffers.buf_large = large;
2549
2550         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
2551         if (rc != 0) {
2552                 rc = -errno;
2553                 snprintf(err_str,
2554                          sizeof(err_str),
2555                          "\"cannot configure buffers: %s\"", strerror(errno));
2556                 goto out;
2557         }
2558
2559 out:
2560         cYAML_build_error(rc, seq_no, ADD_CMD, "buf", err_str, err_rc);
2561
2562         return rc;
2563 }
2564
2565 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
2566                              struct cYAML **err_rc, bool backup)
2567 {
2568         struct lnet_ioctl_config_data *data;
2569         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
2570         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2571         int l_errno = 0;
2572         char *buf;
2573         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
2574         int buf_count[LNET_NRBPOOLS] = {0};
2575         struct cYAML *root = NULL, *pools_node = NULL,
2576                      *type_node = NULL, *item = NULL, *cpt = NULL,
2577                      *first_seq = NULL, *buffers = NULL;
2578         int i, j;
2579         char err_str[LNET_MAX_STR_LEN];
2580         char node_name[LNET_MAX_STR_LEN];
2581         bool exist = false;
2582
2583         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
2584
2585         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
2586         if (buf == NULL)
2587                 goto out;
2588
2589         data = (struct lnet_ioctl_config_data *)buf;
2590
2591         root = cYAML_create_object(NULL, NULL);
2592         if (root == NULL)
2593                 goto out;
2594
2595         if (backup)
2596                 pools_node = cYAML_create_object(root, "routing");
2597         else
2598                 pools_node = cYAML_create_seq(root, "routing");
2599         if (pools_node == NULL)
2600                 goto out;
2601
2602         for (i = 0;; i++) {
2603                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
2604                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
2605                                         sizeof(struct lnet_ioctl_pool_cfg);
2606                 data->cfg_count = i;
2607
2608                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
2609                 if (rc != 0) {
2610                         l_errno = errno;
2611                         break;
2612                 }
2613
2614                 exist = true;
2615
2616                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
2617
2618                 if (backup)
2619                         goto calculate_buffers;
2620
2621                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
2622                 item = cYAML_create_seq_item(pools_node);
2623                 if (item == NULL)
2624                         goto out;
2625
2626                 if (first_seq == NULL)
2627                         first_seq = item;
2628
2629                 cpt = cYAML_create_object(item, node_name);
2630                 if (cpt == NULL)
2631                         goto out;
2632
2633 calculate_buffers:
2634                 /* create the tree  and print */
2635                 for (j = 0; j < LNET_NRBPOOLS; j++) {
2636                         if (!backup) {
2637                                 type_node = cYAML_create_object(cpt, pools[j]);
2638                                 if (type_node == NULL)
2639                                         goto out;
2640                         }
2641                         if (!backup &&
2642                             cYAML_create_number(type_node, "npages",
2643                                                 pool_cfg->pl_pools[j].pl_npages)
2644                             == NULL)
2645                                 goto out;
2646                         if (!backup &&
2647                             cYAML_create_number(type_node, "nbuffers",
2648                                                 pool_cfg->pl_pools[j].
2649                                                   pl_nbuffers) == NULL)
2650                                 goto out;
2651                         if (!backup &&
2652                             cYAML_create_number(type_node, "credits",
2653                                                 pool_cfg->pl_pools[j].
2654                                                    pl_credits) == NULL)
2655                                 goto out;
2656                         if (!backup &&
2657                             cYAML_create_number(type_node, "mincredits",
2658                                                 pool_cfg->pl_pools[j].
2659                                                    pl_mincredits) == NULL)
2660                                 goto out;
2661                         /* keep track of the total count for each of the
2662                          * tiny, small and large buffers */
2663                         buf_count[j] += pool_cfg->pl_pools[j].pl_nbuffers;
2664                 }
2665         }
2666
2667         if (pool_cfg != NULL) {
2668                 if (backup) {
2669                         if (cYAML_create_number(pools_node, "enable",
2670                                                 pool_cfg->pl_routing) ==
2671                         NULL)
2672                                 goto out;
2673
2674                         goto add_buffer_section;
2675                 }
2676
2677                 item = cYAML_create_seq_item(pools_node);
2678                 if (item == NULL)
2679                         goto out;
2680
2681                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
2682                     NULL)
2683                         goto out;
2684         }
2685
2686 add_buffer_section:
2687         /* create a buffers entry in the show. This is necessary so that
2688          * if the YAML output is used to configure a node, the buffer
2689          * configuration takes hold */
2690         buffers = cYAML_create_object(root, "buffers");
2691         if (buffers == NULL)
2692                 goto out;
2693
2694         for (i = 0; i < LNET_NRBPOOLS; i++) {
2695                 if (cYAML_create_number(buffers, pools[i], buf_count[i]) == NULL)
2696                         goto out;
2697         }
2698
2699         if (show_rc == NULL)
2700                 cYAML_print_tree(root);
2701
2702         if (l_errno != ENOENT) {
2703                 snprintf(err_str,
2704                          sizeof(err_str),
2705                          "\"cannot get routing information: %s\"",
2706                          strerror(l_errno));
2707                 rc = -l_errno;
2708                 goto out;
2709         } else
2710                 rc = LUSTRE_CFG_RC_NO_ERR;
2711
2712         snprintf(err_str, sizeof(err_str), "\"success\"");
2713         rc = LUSTRE_CFG_RC_NO_ERR;
2714
2715 out:
2716         free(buf);
2717         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2718                 cYAML_free_tree(root);
2719         } else if (show_rc != NULL && *show_rc != NULL) {
2720                 struct cYAML *routing_node;
2721                 /* there should exist only one routing block and one
2722                  * buffers block. If there already exists a previous one
2723                  * then don't add another */
2724                 routing_node = cYAML_get_object_item(*show_rc, "routing");
2725                 if (routing_node == NULL) {
2726                         cYAML_insert_sibling((*show_rc)->cy_child,
2727                                                 root->cy_child);
2728                         free(root);
2729                 } else {
2730                         cYAML_free_tree(root);
2731                 }
2732         } else {
2733                 *show_rc = root;
2734         }
2735
2736         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
2737
2738         return rc;
2739 }
2740
2741 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
2742                           struct cYAML **show_rc, struct cYAML **err_rc,
2743                           bool backup)
2744 {
2745         /*
2746          * TODO: This function is changing in a future patch to accommodate
2747          * PEER_LIST and proper filtering on any nid of the peer
2748          */
2749         struct lnet_ioctl_peer_cfg peer_info;
2750         struct lnet_peer_ni_credit_info *lpni_cri;
2751         struct lnet_ioctl_element_stats *lpni_stats;
2752         struct lnet_ioctl_element_msg_stats *msg_stats;
2753         lnet_nid_t *nidp;
2754         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2755         int i, j, k;
2756         int l_errno = 0;
2757         __u32 count;
2758         __u32 size;
2759         struct cYAML *root = NULL, *peer = NULL, *peer_ni = NULL,
2760                      *first_seq = NULL, *peer_root = NULL, *tmp = NULL,
2761                      *msg_statistics = NULL, *statistics = NULL;
2762         char err_str[LNET_MAX_STR_LEN];
2763         struct lnet_process_id *list = NULL;
2764         void *data = NULL;
2765         void *lpni_data;
2766
2767         snprintf(err_str, sizeof(err_str),
2768                  "\"out of memory\"");
2769
2770         /* create struct cYAML root object */
2771         root = cYAML_create_object(NULL, NULL);
2772         if (root == NULL)
2773                 goto out;
2774
2775         peer_root = cYAML_create_seq(root, "peer");
2776         if (peer_root == NULL)
2777                 goto out;
2778
2779         count = 1000;
2780         size = count * sizeof(struct lnet_process_id);
2781         list = malloc(size);
2782         if (list == NULL) {
2783                 l_errno = ENOMEM;
2784                 goto out;
2785         }
2786         if (knid != NULL) {
2787                 list[0].nid = libcfs_str2nid(knid);
2788                 count = 1;
2789         } else {
2790                 for (;;) {
2791                         memset(&peer_info, 0, sizeof(peer_info));
2792                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2793                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2794                         peer_info.prcfg_size = size;
2795                         peer_info.prcfg_bulk = list;
2796
2797                         l_errno = 0;
2798                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST,
2799                                      &peer_info);
2800                         count = peer_info.prcfg_count;
2801                         if (rc == 0)
2802                                 break;
2803                         l_errno = errno;
2804                         if (l_errno != E2BIG) {
2805                                 snprintf(err_str,
2806                                         sizeof(err_str),
2807                                         "\"cannot get peer list: %s\"",
2808                                         strerror(l_errno));
2809                                 rc = -l_errno;
2810                                 goto out;
2811                         }
2812                         free(list);
2813                         size = peer_info.prcfg_size;
2814                         list = malloc(size);
2815                         if (list == NULL) {
2816                                 l_errno = ENOMEM;
2817                                 goto out;
2818                         }
2819                 }
2820         }
2821
2822         size = 4096;
2823         data = malloc(size);
2824         if (data == NULL) {
2825                 l_errno = ENOMEM;
2826                 goto out;
2827         }
2828         for (i = 0; i < count; i++) {
2829                 for (;;) {
2830                         memset(&peer_info, 0, sizeof(peer_info));
2831                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2832                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2833                         peer_info.prcfg_prim_nid = list[i].nid;
2834                         peer_info.prcfg_size = size;
2835                         peer_info.prcfg_bulk = data;
2836
2837                         l_errno = 0;
2838                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_NI,
2839                                      &peer_info);
2840                         if (rc == 0)
2841                                 break;
2842                         l_errno = errno;
2843                         if (l_errno != E2BIG) {
2844                                 snprintf(err_str,
2845                                         sizeof(err_str),
2846                                         "\"cannot get peer information: %s\"",
2847                                         strerror(l_errno));
2848                                 rc = -l_errno;
2849                                 goto out;
2850                         }
2851                         free(data);
2852                         size = peer_info.prcfg_size;
2853                         data = malloc(size);
2854                         if (data == NULL) {
2855                                 l_errno = ENOMEM;
2856                                 goto out;
2857                         }
2858                 }
2859
2860                 peer = cYAML_create_seq_item(peer_root);
2861                 if (peer == NULL)
2862                         goto out;
2863
2864                 if (first_seq == NULL)
2865                         first_seq = peer;
2866
2867                 lnet_nid_t pnid = peer_info.prcfg_prim_nid;
2868                 if (cYAML_create_string(peer, "primary nid",
2869                                         libcfs_nid2str(pnid))
2870                     == NULL)
2871                         goto out;
2872                 if (cYAML_create_string(peer, "Multi-Rail",
2873                                         peer_info.prcfg_mr ? "True" : "False")
2874                     == NULL)
2875                         goto out;
2876                 /*
2877                  * print out the state of the peer only if details are
2878                  * requested
2879                  */
2880                 if (detail >= 3) {
2881                         if (!backup &&
2882                             cYAML_create_number(peer, "peer state",
2883                                                 peer_info.prcfg_state)
2884                                 == NULL)
2885                                 goto out;
2886                 }
2887
2888                 tmp = cYAML_create_seq(peer, "peer ni");
2889                 if (tmp == NULL)
2890                         goto out;
2891
2892                 lpni_data = data;
2893                 for (j = 0; j < peer_info.prcfg_count; j++) {
2894                         nidp = lpni_data;
2895                         lpni_cri = (void*)nidp + sizeof(nidp);
2896                         lpni_stats = (void *)lpni_cri + sizeof(*lpni_cri);
2897                         msg_stats = (void *)lpni_stats + sizeof(*lpni_stats);
2898                         lpni_data = (void *)msg_stats + sizeof(*msg_stats);
2899
2900                         peer_ni = cYAML_create_seq_item(tmp);
2901                         if (peer_ni == NULL)
2902                                 goto out;
2903
2904                         if (cYAML_create_string(peer_ni, "nid",
2905                                                 libcfs_nid2str(*nidp))
2906                             == NULL)
2907                                 goto out;
2908
2909                         if (backup)
2910                                 continue;
2911
2912                         if (cYAML_create_string(peer_ni, "state",
2913                                                 lpni_cri->cr_aliveness)
2914                             == NULL)
2915                                 goto out;
2916
2917                         if (!detail)
2918                                 continue;
2919
2920                         if (cYAML_create_number(peer_ni, "max_ni_tx_credits",
2921                                                 lpni_cri->cr_ni_peer_tx_credits)
2922                             == NULL)
2923                                 goto out;
2924
2925                         if (cYAML_create_number(peer_ni, "available_tx_credits",
2926                                                 lpni_cri->cr_peer_tx_credits)
2927                             == NULL)
2928                                 goto out;
2929
2930                         if (cYAML_create_number(peer_ni, "min_tx_credits",
2931                                                 lpni_cri->cr_peer_min_tx_credits)
2932                             == NULL)
2933                                 goto out;
2934
2935                         if (cYAML_create_number(peer_ni, "tx_q_num_of_buf",
2936                                                 lpni_cri->cr_peer_tx_qnob)
2937                             == NULL)
2938                                 goto out;
2939
2940                         if (cYAML_create_number(peer_ni, "available_rtr_credits",
2941                                                 lpni_cri->cr_peer_rtr_credits)
2942                             == NULL)
2943                                 goto out;
2944
2945                         if (cYAML_create_number(peer_ni, "min_rtr_credits",
2946                                                 lpni_cri->cr_peer_min_rtr_credits)
2947                             == NULL)
2948                                 goto out;
2949
2950                         if (cYAML_create_number(peer_ni, "refcount",
2951                                                 lpni_cri->cr_refcount) == NULL)
2952                                 goto out;
2953
2954                         statistics = cYAML_create_object(peer_ni, "statistics");
2955                         if (statistics == NULL)
2956                                 goto out;
2957
2958                         if (cYAML_create_number(statistics, "send_count",
2959                                                 lpni_stats->iel_send_count)
2960                             == NULL)
2961                                 goto out;
2962
2963                         if (cYAML_create_number(statistics, "recv_count",
2964                                                 lpni_stats->iel_recv_count)
2965                             == NULL)
2966                                 goto out;
2967
2968                         if (cYAML_create_number(statistics, "drop_count",
2969                                                 lpni_stats->iel_drop_count)
2970                             == NULL)
2971                                 goto out;
2972
2973                         if (detail < 2)
2974                                 continue;
2975
2976                         for (k = 0; k < 3; k++) {
2977                                 struct lnet_ioctl_comm_count *counts;
2978
2979                                 msg_statistics = cYAML_create_object(peer_ni,
2980                                                  (char *) gmsg_stat_names[k]);
2981                                 if (msg_statistics == NULL)
2982                                         goto out;
2983
2984                                 counts = get_counts(msg_stats, k);
2985                                 if (counts == NULL)
2986                                         goto out;
2987
2988                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
2989                                                                counts))
2990                                         goto out;
2991                         }
2992
2993                 }
2994         }
2995
2996         /* print output iff show_rc is not provided */
2997         if (show_rc == NULL)
2998                 cYAML_print_tree(root);
2999
3000         snprintf(err_str, sizeof(err_str), "\"success\"");
3001         rc = LUSTRE_CFG_RC_NO_ERR;
3002
3003 out:
3004         free(list);
3005         free(data);
3006         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3007                 cYAML_free_tree(root);
3008         } else if (show_rc != NULL && *show_rc != NULL) {
3009                 struct cYAML *show_node;
3010                 /* find the peer node, if one doesn't exist then
3011                  * insert one.  Otherwise add to the one there
3012                  */
3013                 show_node = cYAML_get_object_item(*show_rc,
3014                                                   "peer");
3015                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3016                         cYAML_insert_child(show_node, first_seq);
3017                         free(peer_root);
3018                         free(root);
3019                 } else if (show_node == NULL) {
3020                         cYAML_insert_sibling((*show_rc)->cy_child,
3021                                              peer_root);
3022                         free(root);
3023                 } else {
3024                         cYAML_free_tree(root);
3025                 }
3026         } else {
3027                 *show_rc = root;
3028         }
3029
3030         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3031                           err_rc);
3032
3033         return rc;
3034 }
3035
3036 int lustre_lnet_list_peer(int seq_no,
3037                           struct cYAML **show_rc, struct cYAML **err_rc)
3038 {
3039         struct lnet_ioctl_peer_cfg peer_info;
3040         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3041         __u32 count;
3042         __u32 size;
3043         int i = 0;
3044         int l_errno = 0;
3045         struct cYAML *root = NULL, *list_root = NULL, *first_seq = NULL;
3046         char err_str[LNET_MAX_STR_LEN];
3047         struct lnet_process_id *list = NULL;
3048
3049         snprintf(err_str, sizeof(err_str),
3050                  "\"out of memory\"");
3051
3052         memset(&peer_info, 0, sizeof(peer_info));
3053
3054         /* create struct cYAML root object */
3055         root = cYAML_create_object(NULL, NULL);
3056         if (root == NULL)
3057                 goto out;
3058
3059         list_root = cYAML_create_seq(root, "peer list");
3060         if (list_root == NULL)
3061                 goto out;
3062
3063         count = 1000;
3064         size = count * sizeof(struct lnet_process_id);
3065         list = malloc(size);
3066         if (list == NULL) {
3067                 l_errno = ENOMEM;
3068                 goto out;
3069         }
3070         for (;;) {
3071                 LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
3072                 peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
3073                 peer_info.prcfg_size = size;
3074                 peer_info.prcfg_bulk = list;
3075
3076                 l_errno = 0;
3077                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST, &peer_info);
3078                 count = peer_info.prcfg_count;
3079                 if (rc == 0)
3080                         break;
3081                 l_errno = errno;
3082                 if (l_errno != E2BIG) {
3083                         snprintf(err_str,
3084                                 sizeof(err_str),
3085                                 "\"cannot get peer list: %s\"",
3086                                 strerror(l_errno));
3087                         rc = -l_errno;
3088                         goto out;
3089                 }
3090                 free(list);
3091                 size = peer_info.prcfg_size;
3092                 list = malloc(size);
3093                 if (list == NULL) {
3094                         l_errno = ENOMEM;
3095                         goto out;
3096                 }
3097         }
3098
3099         /* count is now the actual number of ids in the list. */
3100         for (i = 0; i < count; i++) {
3101                 if (cYAML_create_string(list_root, "nid",
3102                                         libcfs_nid2str(list[i].nid))
3103                     == NULL)
3104                         goto out;
3105         }
3106
3107         /* print output iff show_rc is not provided */
3108         if (show_rc == NULL)
3109                 cYAML_print_tree(root);
3110
3111         snprintf(err_str, sizeof(err_str), "\"success\"");
3112         rc = LUSTRE_CFG_RC_NO_ERR;
3113
3114 out:
3115         if (list != NULL)
3116                 free(list);
3117         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3118                 cYAML_free_tree(root);
3119         } else if (show_rc != NULL && *show_rc != NULL) {
3120                 struct cYAML *show_node;
3121                 /* find the peer node, if one doesn't exist then
3122                  * insert one.  Otherwise add to the one there
3123                  */
3124                 show_node = cYAML_get_object_item(*show_rc,
3125                                                   "peer");
3126                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3127                         cYAML_insert_child(show_node, first_seq);
3128                         free(list_root);
3129                         free(root);
3130                 } else if (show_node == NULL) {
3131                         cYAML_insert_sibling((*show_rc)->cy_child,
3132                                              list_root);
3133                         free(root);
3134                 } else {
3135                         cYAML_free_tree(root);
3136                 }
3137         } else {
3138                 *show_rc = root;
3139         }
3140
3141         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3142                           err_rc);
3143
3144         return rc;
3145 }
3146
3147 static void add_to_global(struct cYAML *show_rc, struct cYAML *node,
3148                           struct cYAML *root)
3149 {
3150         struct cYAML *show_node;
3151
3152         show_node = cYAML_get_object_item(show_rc, "global");
3153         if (show_node != NULL)
3154                 cYAML_insert_sibling(show_node->cy_child,
3155                                      node->cy_child);
3156         else
3157                 cYAML_insert_sibling(show_rc->cy_child,
3158                                      node);
3159         free(root);
3160 }
3161
3162 static int build_global_yaml_entry(char *err_str, int err_len, int seq_no,
3163                                    char *name, __u32 value,
3164                                    struct cYAML **show_rc,
3165                                    struct cYAML **err_rc, int err)
3166 {
3167         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3168         struct cYAML *root = NULL, *global = NULL;
3169
3170         if (err) {
3171                 rc = err;
3172                 goto out;
3173         }
3174
3175         root = cYAML_create_object(NULL, NULL);
3176         if (root == NULL)
3177                 goto out;
3178
3179         global = cYAML_create_object(root, "global");
3180         if (global == NULL)
3181                 goto out;
3182
3183         if (cYAML_create_number(global, name,
3184                                 value) == NULL)
3185                 goto out;
3186
3187         if (show_rc == NULL)
3188                 cYAML_print_tree(root);
3189
3190         snprintf(err_str, err_len, "\"success\"");
3191
3192         rc = LUSTRE_CFG_RC_NO_ERR;
3193
3194 out:
3195         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3196                 cYAML_free_tree(root);
3197         } else if (show_rc != NULL && *show_rc != NULL) {
3198                 add_to_global(*show_rc, global, root);
3199         } else {
3200                 *show_rc = root;
3201         }
3202
3203         cYAML_build_error(rc, seq_no, SHOW_CMD, "global", err_str, err_rc);
3204
3205         return rc;
3206 }
3207
3208 static int ioctl_show_global_values(int ioc, int seq_no, char *name,
3209                                     struct cYAML **show_rc,
3210                                     struct cYAML **err_rc)
3211 {
3212         struct lnet_ioctl_set_value data;
3213         int rc;
3214         int l_errno = 0;
3215         char err_str[LNET_MAX_STR_LEN];
3216
3217         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3218
3219         LIBCFS_IOC_INIT_V2(data, sv_hdr);
3220
3221         rc = l_ioctl(LNET_DEV_ID, ioc, &data);
3222         if (rc != 0) {
3223                 l_errno = -errno;
3224                 snprintf(err_str,
3225                          sizeof(err_str),
3226                          "\"cannot get %s: %s\"",
3227                          name, strerror(l_errno));
3228         }
3229
3230         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no, name,
3231                                        data.sv_value, show_rc, err_rc, l_errno);
3232 }
3233
3234 int lustre_lnet_show_transaction_to(int seq_no, struct cYAML **show_rc,
3235                                     struct cYAML **err_rc)
3236 {
3237         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3238         char val[LNET_MAX_STR_LEN];
3239         int tto = -1, l_errno = 0;
3240         char err_str[LNET_MAX_STR_LEN];
3241
3242         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3243
3244         rc = read_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
3245                              1, sizeof(val));
3246         if (rc) {
3247                 l_errno = -errno;
3248                 snprintf(err_str, sizeof(err_str),
3249                          "\"cannot get transaction timeout: %d\"", rc);
3250         } else {
3251                 tto = atoi(val);
3252         }
3253
3254         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3255                                        "transaction_timeout", tto, show_rc,
3256                                        err_rc, l_errno);
3257 }
3258
3259 int lustre_lnet_show_retry_count(int seq_no, struct cYAML **show_rc,
3260                                  struct cYAML **err_rc)
3261 {
3262         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3263         char val[LNET_MAX_STR_LEN];
3264         int retry_count = -1, l_errno = 0;
3265         char err_str[LNET_MAX_STR_LEN];
3266
3267         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3268
3269         rc = read_sysfs_file(modparam_path, "lnet_retry_count", val,
3270                              1, sizeof(val));
3271         if (rc) {
3272                 l_errno = -errno;
3273                 snprintf(err_str, sizeof(err_str),
3274                          "\"cannot get retry count: %d\"", rc);
3275         } else {
3276                 retry_count = atoi(val);
3277         }
3278
3279         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3280                                        "retry_count", retry_count, show_rc,
3281                                        err_rc, l_errno);
3282 }
3283
3284 int lustre_lnet_show_max_intf(int seq_no, struct cYAML **show_rc,
3285                               struct cYAML **err_rc)
3286 {
3287         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3288         char val[LNET_MAX_STR_LEN];
3289         int max_intf = -1, l_errno = 0;
3290         char err_str[LNET_MAX_STR_LEN];
3291
3292         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3293
3294         rc = read_sysfs_file(modparam_path, "lnet_interfaces_max", val,
3295                              1, sizeof(val));
3296         if (rc) {
3297                 l_errno = -errno;
3298                 snprintf(err_str, sizeof(err_str),
3299                          "\"cannot get max interfaces: %d\"", rc);
3300         } else {
3301                 max_intf = atoi(val);
3302         }
3303
3304         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3305                                        "max_intf", max_intf, show_rc,
3306                                        err_rc, l_errno);
3307 }
3308
3309 int lustre_lnet_show_discovery(int seq_no, struct cYAML **show_rc,
3310                                struct cYAML **err_rc)
3311 {
3312         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3313         char val[LNET_MAX_STR_LEN];
3314         int discovery = -1, l_errno = 0;
3315         char err_str[LNET_MAX_STR_LEN];
3316
3317         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3318
3319         rc = read_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
3320                              1, sizeof(val));
3321         if (rc) {
3322                 l_errno = -errno;
3323                 snprintf(err_str, sizeof(err_str),
3324                          "\"cannot get discovery setting: %d\"", rc);
3325         } else {
3326                 /*
3327                  * The kernel stores a discovery disabled value. User space
3328                  * shows whether discovery is enabled. So the value must be
3329                  * inverted.
3330                  */
3331                 discovery = !atoi(val);
3332         }
3333
3334         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3335                                        "discovery", discovery, show_rc,
3336                                        err_rc, l_errno);
3337 }
3338
3339 int lustre_lnet_show_numa_range(int seq_no, struct cYAML **show_rc,
3340                                 struct cYAML **err_rc)
3341 {
3342         return ioctl_show_global_values(IOC_LIBCFS_GET_NUMA_RANGE, seq_no,
3343                                         "numa_range", show_rc, err_rc);
3344 }
3345
3346 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
3347                            struct cYAML **err_rc)
3348 {
3349         struct lnet_ioctl_lnet_stats data;
3350         int rc;
3351         int l_errno;
3352         char err_str[LNET_MAX_STR_LEN];
3353         struct cYAML *root = NULL, *stats = NULL;
3354
3355         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3356
3357         LIBCFS_IOC_INIT_V2(data, st_hdr);
3358
3359         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LNET_STATS, &data);
3360         if (rc != 0) {
3361                 l_errno = errno;
3362                 snprintf(err_str,
3363                          sizeof(err_str),
3364                          "\"cannot get lnet statistics: %s\"",
3365                          strerror(l_errno));
3366                 rc = -l_errno;
3367                 goto out;
3368         }
3369
3370         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3371
3372         root = cYAML_create_object(NULL, NULL);
3373         if (root == NULL)
3374                 goto out;
3375
3376         stats = cYAML_create_object(root, "statistics");
3377         if (stats == NULL)
3378                 goto out;
3379
3380         if (cYAML_create_number(stats, "msgs_alloc",
3381                                 data.st_cntrs.msgs_alloc) == NULL)
3382                 goto out;
3383
3384         if (cYAML_create_number(stats, "msgs_max",
3385                                 data.st_cntrs.msgs_max) == NULL)
3386                 goto out;
3387
3388         if (cYAML_create_number(stats, "errors",
3389                                 data.st_cntrs.errors) == NULL)
3390                 goto out;
3391
3392         if (cYAML_create_number(stats, "send_count",
3393                                 data.st_cntrs.send_count) == NULL)
3394                 goto out;
3395
3396         if (cYAML_create_number(stats, "recv_count",
3397                                 data.st_cntrs.recv_count) == NULL)
3398                 goto out;
3399
3400         if (cYAML_create_number(stats, "route_count",
3401                                 data.st_cntrs.route_count) == NULL)
3402                 goto out;
3403
3404         if (cYAML_create_number(stats, "drop_count",
3405                                 data.st_cntrs.drop_count) == NULL)
3406                 goto out;
3407
3408         if (cYAML_create_number(stats, "send_length",
3409                                 data.st_cntrs.send_length) == NULL)
3410                 goto out;
3411
3412         if (cYAML_create_number(stats, "recv_length",
3413                                 data.st_cntrs.recv_length) == NULL)
3414                 goto out;
3415
3416         if (cYAML_create_number(stats, "route_length",
3417                                 data.st_cntrs.route_length) == NULL)
3418                 goto out;
3419
3420         if (cYAML_create_number(stats, "drop_length",
3421                                 data.st_cntrs.drop_length) == NULL)
3422                 goto out;
3423
3424         if (show_rc == NULL)
3425                 cYAML_print_tree(root);
3426
3427         snprintf(err_str, sizeof(err_str), "\"success\"");
3428         rc = LUSTRE_CFG_RC_NO_ERR;
3429 out:
3430         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3431                 cYAML_free_tree(root);
3432         } else if (show_rc != NULL && *show_rc != NULL) {
3433                 cYAML_insert_sibling((*show_rc)->cy_child,
3434                                         root->cy_child);
3435                 free(root);
3436         } else {
3437                 *show_rc = root;
3438         }
3439
3440         cYAML_build_error(rc, seq_no, SHOW_CMD, "statistics", err_str, err_rc);
3441
3442         return rc;
3443 }
3444
3445 typedef int (*cmd_handler_t)(struct cYAML *tree,
3446                              struct cYAML **show_rc,
3447                              struct cYAML **err_rc);
3448
3449 static int handle_yaml_config_route(struct cYAML *tree, struct cYAML **show_rc,
3450                                     struct cYAML **err_rc)
3451 {
3452         struct cYAML *net, *gw, *hop, *prio, *seq_no;
3453
3454         net = cYAML_get_object_item(tree, "net");
3455         gw = cYAML_get_object_item(tree, "gateway");
3456         hop = cYAML_get_object_item(tree, "hop");
3457         prio = cYAML_get_object_item(tree, "priority");
3458         seq_no = cYAML_get_object_item(tree, "seq_no");
3459
3460         return lustre_lnet_config_route((net) ? net->cy_valuestring : NULL,
3461                                         (gw) ? gw->cy_valuestring : NULL,
3462                                         (hop) ? hop->cy_valueint : -1,
3463                                         (prio) ? prio->cy_valueint : -1,
3464                                         (seq_no) ? seq_no->cy_valueint : -1,
3465                                         err_rc);
3466 }
3467
3468 static void yaml_free_string_array(char **array, int num)
3469 {
3470         int i;
3471         char **sub_array = array;
3472
3473         for (i = 0; i < num; i++) {
3474                 if (*sub_array != NULL)
3475                         free(*sub_array);
3476                 sub_array++;
3477         }
3478         if (array)
3479                 free(array);
3480 }
3481
3482 /*
3483  *    interfaces:
3484  *        0: <intf_name>['['<expr>']']
3485  *        1: <intf_name>['['<expr>']']
3486  */
3487 static int yaml_copy_intf_info(struct cYAML *intf_tree,
3488                                struct lnet_dlc_network_descr *nw_descr)
3489 {
3490         struct cYAML *child = NULL;
3491         int intf_num = 0, rc = LUSTRE_CFG_RC_NO_ERR;
3492         struct lnet_dlc_intf_descr *intf_descr, *tmp;
3493
3494         if (intf_tree == NULL || nw_descr == NULL)
3495                 return LUSTRE_CFG_RC_BAD_PARAM;
3496
3497         /* now grab all the interfaces and their cpts */
3498         child = intf_tree->cy_child;
3499         while (child != NULL) {
3500                 if (child->cy_valuestring == NULL) {
3501                         child = child->cy_next;
3502                         continue;
3503                 }
3504
3505                 if (strlen(child->cy_valuestring) >= LNET_MAX_STR_LEN)
3506                         goto failed;
3507
3508                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist,
3509                                                 child->cy_valuestring,
3510                                                 strlen(child->cy_valuestring));
3511                 if (rc != LUSTRE_CFG_RC_NO_ERR)
3512                         goto failed;
3513
3514                 intf_num++;
3515                 child = child->cy_next;
3516         }
3517
3518         if (intf_num == 0)
3519                 return LUSTRE_CFG_RC_MISSING_PARAM;
3520
3521         return intf_num;
3522
3523 failed:
3524         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
3525                                  intf_on_network) {
3526                 list_del(&intf_descr->intf_on_network);
3527                 free_intf_descr(intf_descr);
3528         }
3529
3530         return rc;
3531 }
3532
3533 static bool
3534 yaml_extract_cmn_tunables(struct cYAML *tree,
3535                           struct lnet_ioctl_config_lnd_cmn_tunables *tunables,
3536                           struct cfs_expr_list **global_cpts)
3537 {
3538         struct cYAML *tun, *item, *smp;
3539         int rc;
3540
3541         tun = cYAML_get_object_item(tree, "tunables");
3542         if (tun != NULL) {
3543                 item = cYAML_get_object_item(tun, "peer_timeout");
3544                 if (item != NULL)
3545                         tunables->lct_peer_timeout = item->cy_valueint;
3546                 item = cYAML_get_object_item(tun, "peer_credits");
3547                 if (item != NULL)
3548                         tunables->lct_peer_tx_credits = item->cy_valueint;
3549                 item = cYAML_get_object_item(tun, "peer_buffer_credits");
3550                 if (item != NULL)
3551                         tunables->lct_peer_rtr_credits = item->cy_valueint;
3552                 item = cYAML_get_object_item(tun, "credits");
3553                 if (item != NULL)
3554                         tunables->lct_max_tx_credits = item->cy_valueint;
3555                 smp = cYAML_get_object_item(tun, "CPT");
3556                 if (smp != NULL) {
3557                         rc = cfs_expr_list_parse(smp->cy_valuestring,
3558                                                  strlen(smp->cy_valuestring),
3559                                                  0, UINT_MAX, global_cpts);
3560                         if (rc != 0)
3561                                 *global_cpts = NULL;
3562                 }
3563
3564                 return true;
3565         }
3566
3567         return false;
3568 }
3569
3570 static bool
3571 yaml_extract_tunables(struct cYAML *tree,
3572                       struct lnet_ioctl_config_lnd_tunables *tunables,
3573                       struct cfs_expr_list **global_cpts,
3574                       __u32 net_type)
3575 {
3576         bool rc;
3577
3578         rc = yaml_extract_cmn_tunables(tree, &tunables->lt_cmn,
3579                                        global_cpts);
3580
3581         if (!rc)
3582                 return rc;
3583
3584         lustre_yaml_extract_lnd_tunables(tree, net_type,
3585                                          &tunables->lt_tun);
3586
3587         return rc;
3588 }
3589
3590 /*
3591  * net:
3592  *    - net type: <net>[<NUM>]
3593   *      local NI(s):
3594  *        - nid: <ip>@<net>[<NUM>]
3595  *          status: up
3596  *          interfaces:
3597  *               0: <intf_name>['['<expr>']']
3598  *               1: <intf_name>['['<expr>']']
3599  *        tunables:
3600  *               peer_timeout: <NUM>
3601  *               peer_credits: <NUM>
3602  *               peer_buffer_credits: <NUM>
3603  *               credits: <NUM>
3604 *         lnd tunables:
3605  *               peercredits_hiw: <NUM>
3606  *               map_on_demand: <NUM>
3607  *               concurrent_sends: <NUM>
3608  *               fmr_pool_size: <NUM>
3609  *               fmr_flush_trigger: <NUM>
3610  *               fmr_cache: <NUM>
3611  *
3612  * At least one interface is required. If no interfaces are provided the
3613  * network interface can not be configured.
3614  */
3615 static int handle_yaml_config_ni(struct cYAML *tree, struct cYAML **show_rc,
3616                                  struct cYAML **err_rc)
3617 {
3618         struct cYAML *net, *intf, *seq_no, *ip2net = NULL, *local_nis = NULL,
3619                      *item = NULL;
3620         int num_entries = 0, rc;
3621         struct lnet_dlc_network_descr nw_descr;
3622         struct cfs_expr_list *global_cpts = NULL;
3623         struct lnet_ioctl_config_lnd_tunables tunables;
3624         bool found = false;
3625
3626         memset(&tunables, 0, sizeof(tunables));
3627
3628         INIT_LIST_HEAD(&nw_descr.network_on_rule);
3629         INIT_LIST_HEAD(&nw_descr.nw_intflist);
3630
3631         ip2net = cYAML_get_object_item(tree, "ip2net");
3632         net = cYAML_get_object_item(tree, "net type");
3633         if (net)
3634                 nw_descr.nw_id = libcfs_str2net(net->cy_valuestring);
3635         else
3636                 nw_descr.nw_id = LOLND;
3637
3638         /*
3639          * if neither net nor ip2nets are present, then we can not
3640          * configure the network.
3641          */
3642         if (!net && !ip2net)
3643                 return LUSTRE_CFG_RC_MISSING_PARAM;
3644
3645         local_nis = cYAML_get_object_item(tree, "local NI(s)");
3646         if (local_nis == NULL)
3647                 return LUSTRE_CFG_RC_MISSING_PARAM;
3648
3649         if (!cYAML_is_sequence(local_nis))
3650                 return LUSTRE_CFG_RC_BAD_PARAM;
3651
3652         while (cYAML_get_next_seq_item(local_nis, &item) != NULL) {
3653                 intf = cYAML_get_object_item(item, "interfaces");
3654                 if (intf == NULL)
3655                         continue;
3656                 num_entries = yaml_copy_intf_info(intf, &nw_descr);
3657                 if (num_entries <= 0) {
3658                         cYAML_build_error(num_entries, -1, "ni", "add",
3659                                         "bad interface list",
3660                                         err_rc);
3661                         return LUSTRE_CFG_RC_BAD_PARAM;
3662                 }
3663         }
3664
3665         found = yaml_extract_tunables(tree, &tunables, &global_cpts,
3666                                       LNET_NETTYP(nw_descr.nw_id));
3667         seq_no = cYAML_get_object_item(tree, "seq_no");
3668
3669         rc = lustre_lnet_config_ni(&nw_descr,
3670                                    global_cpts,
3671                                    (ip2net) ? ip2net->cy_valuestring : NULL,
3672                                    (found) ? &tunables: NULL,
3673                                    (seq_no) ? seq_no->cy_valueint : -1,
3674                                    err_rc);
3675
3676         if (global_cpts != NULL)
3677                 cfs_expr_list_free(global_cpts);
3678
3679         return rc;
3680 }
3681
3682 /*
3683  * ip2nets:
3684  *  - net-spec: <tcp|o2ib|gni>[NUM]
3685  *    interfaces:
3686  *        0: <intf name>['['<expr>']']
3687  *        1: <intf name>['['<expr>']']
3688  *    ip-range:
3689  *        0: <expr.expr.expr.expr>
3690  *        1: <expr.expr.expr.expr>
3691  */
3692 static int handle_yaml_config_ip2nets(struct cYAML *tree,
3693                                       struct cYAML **show_rc,
3694                                       struct cYAML **err_rc)
3695 {
3696         struct cYAML *net, *ip_range, *item = NULL, *intf = NULL,
3697                      *seq_no = NULL;
3698         struct lustre_lnet_ip2nets ip2nets;
3699         struct lustre_lnet_ip_range_descr *ip_range_descr = NULL,
3700                                           *tmp = NULL;
3701         int rc = LUSTRE_CFG_RC_NO_ERR;
3702         struct cfs_expr_list *global_cpts = NULL;
3703         struct cfs_expr_list *el, *el_tmp;
3704         struct lnet_ioctl_config_lnd_tunables tunables;
3705         struct lnet_dlc_intf_descr *intf_descr, *intf_tmp;
3706         bool found = false;
3707
3708         memset(&tunables, 0, sizeof(tunables));
3709
3710         /* initialize all lists */
3711         INIT_LIST_HEAD(&ip2nets.ip2nets_ip_ranges);
3712         INIT_LIST_HEAD(&ip2nets.ip2nets_net.network_on_rule);
3713         INIT_LIST_HEAD(&ip2nets.ip2nets_net.nw_intflist);
3714
3715         net = cYAML_get_object_item(tree, "net-spec");
3716         if (net == NULL)
3717                 return LUSTRE_CFG_RC_BAD_PARAM;
3718
3719         if (net != NULL && net->cy_valuestring == NULL)
3720                 return LUSTRE_CFG_RC_BAD_PARAM;
3721
3722         /* assign the network id */
3723         ip2nets.ip2nets_net.nw_id = libcfs_str2net(net->cy_valuestring);
3724         if (ip2nets.ip2nets_net.nw_id == LNET_NID_ANY)
3725                 return LUSTRE_CFG_RC_BAD_PARAM;
3726
3727         seq_no = cYAML_get_object_item(tree, "seq_no");
3728
3729         intf = cYAML_get_object_item(tree, "interfaces");
3730         if (intf != NULL) {
3731                 rc = yaml_copy_intf_info(intf, &ip2nets.ip2nets_net);
3732                 if (rc <= 0)
3733                         return LUSTRE_CFG_RC_BAD_PARAM;
3734         }
3735
3736         ip_range = cYAML_get_object_item(tree, "ip-range");
3737         if (ip_range != NULL) {
3738                 item = ip_range->cy_child;
3739                 while (item != NULL) {
3740                         if (item->cy_valuestring == NULL) {
3741                                 item = item->cy_next;
3742                                 continue;
3743                         }
3744
3745                         rc = lustre_lnet_add_ip_range(&ip2nets.ip2nets_ip_ranges,
3746                                                       item->cy_valuestring);
3747
3748                         if (rc != LUSTRE_CFG_RC_NO_ERR)
3749                                 goto out;
3750
3751                         item = item->cy_next;
3752                 }
3753         }
3754
3755         found = yaml_extract_tunables(tree, &tunables, &global_cpts,
3756                                       LNET_NETTYP(ip2nets.ip2nets_net.nw_id));
3757
3758         rc = lustre_lnet_config_ip2nets(&ip2nets,
3759                         (found) ? &tunables : NULL,
3760                         global_cpts,
3761                         (seq_no) ? seq_no->cy_valueint : -1,
3762                         err_rc);
3763
3764         /*
3765          * don't stop because there was no match. Continue processing the
3766          * rest of the rules. If non-match then nothing is configured
3767          */
3768         if (rc == LUSTRE_CFG_RC_NO_MATCH)
3769                 rc = LUSTRE_CFG_RC_NO_ERR;
3770 out:
3771         list_for_each_entry_safe(intf_descr, intf_tmp,
3772                                  &ip2nets.ip2nets_net.nw_intflist,
3773                                  intf_on_network) {
3774                 list_del(&intf_descr->intf_on_network);
3775                 free_intf_descr(intf_descr);
3776         }
3777
3778         list_for_each_entry_safe(ip_range_descr, tmp,
3779                                  &ip2nets.ip2nets_ip_ranges,
3780                                  ipr_entry) {
3781                 list_del(&ip_range_descr->ipr_entry);
3782                 list_for_each_entry_safe(el, el_tmp, &ip_range_descr->ipr_expr,
3783                                          el_link) {
3784                         list_del(&el->el_link);
3785                         cfs_expr_list_free(el);
3786                 }
3787                 free(ip_range_descr);
3788         }
3789
3790         return rc;
3791 }
3792
3793 static int handle_yaml_del_ni(struct cYAML *tree, struct cYAML **show_rc,
3794                               struct cYAML **err_rc)
3795 {
3796         struct cYAML *net = NULL, *intf = NULL, *seq_no = NULL, *item = NULL,
3797                      *local_nis = NULL;
3798         int num_entries, rc;
3799         struct lnet_dlc_network_descr nw_descr;
3800
3801         INIT_LIST_HEAD(&nw_descr.network_on_rule);
3802         INIT_LIST_HEAD(&nw_descr.nw_intflist);
3803
3804         net = cYAML_get_object_item(tree, "net type");
3805         if (net != NULL)
3806                 nw_descr.nw_id = libcfs_str2net(net->cy_valuestring);
3807
3808         local_nis = cYAML_get_object_item(tree, "local NI(s)");
3809         if (local_nis == NULL)
3810                 return LUSTRE_CFG_RC_MISSING_PARAM;
3811
3812         if (!cYAML_is_sequence(local_nis))
3813                 return LUSTRE_CFG_RC_BAD_PARAM;
3814
3815         while (cYAML_get_next_seq_item(local_nis, &item) != NULL) {
3816                 intf = cYAML_get_object_item(item, "interfaces");
3817                 if (intf == NULL)
3818                         continue;
3819                 num_entries = yaml_copy_intf_info(intf, &nw_descr);
3820                 if (num_entries <= 0) {
3821                         cYAML_build_error(num_entries, -1, "ni", "add",
3822                                         "bad interface list",
3823                                         err_rc);
3824                         return LUSTRE_CFG_RC_BAD_PARAM;
3825                 }
3826         }
3827
3828         seq_no = cYAML_get_object_item(tree, "seq_no");
3829
3830         rc = lustre_lnet_del_ni((net) ? &nw_descr : NULL,
3831                                 (seq_no) ? seq_no->cy_valueint : -1,
3832                                 err_rc);
3833
3834         return rc;
3835 }
3836
3837 static int yaml_copy_peer_nids(struct cYAML *nids_entry, char ***nidsppp,
3838                                char *prim_nid, bool del)
3839 {
3840         struct cYAML *child = NULL, *entry = NULL;
3841         char **nids = NULL;
3842         int num = 0, rc = LUSTRE_CFG_RC_NO_ERR;
3843
3844         if (cYAML_is_sequence(nids_entry)) {
3845                 while (cYAML_get_next_seq_item(nids_entry, &child)) {
3846                         entry = cYAML_get_object_item(child, "nid");
3847                         /* don't count an empty entry */
3848                         if (!entry || !entry->cy_valuestring)
3849                                 continue;
3850
3851                         if (prim_nid &&
3852                             (strcmp(entry->cy_valuestring, prim_nid)
3853                                         == 0) && del) {
3854                                 /*
3855                                  * primary nid is present in the list of
3856                                  * nids so that means we want to delete
3857                                  * the entire peer, so no need to go
3858                                  * further. Just delete the entire peer.
3859                                  */
3860                                 return 0;
3861                         }
3862
3863                         num++;
3864                 }
3865         }
3866
3867         if (num == 0)
3868                 return LUSTRE_CFG_RC_MISSING_PARAM;
3869
3870         nids = calloc(sizeof(*nids), num);
3871         if (!nids)
3872                 return LUSTRE_CFG_RC_OUT_OF_MEM;
3873
3874         /* now grab all the nids */
3875         num = 0;
3876         child = NULL;
3877         while (cYAML_get_next_seq_item(nids_entry, &child)) {
3878                 entry = cYAML_get_object_item(child, "nid");
3879                 if (!entry || !entry->cy_valuestring)
3880                         continue;
3881
3882                 nids[num] = calloc(strlen(entry->cy_valuestring) + 1, 1);
3883                 if (!nids[num]) {
3884                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3885                         goto failed;
3886                 }
3887                 strncpy(nids[num], entry->cy_valuestring,
3888                         strlen(entry->cy_valuestring));
3889                 num++;
3890         }
3891         rc = num;
3892
3893         *nidsppp = nids;
3894         return rc;
3895
3896 failed:
3897         if (nids != NULL)
3898                 yaml_free_string_array(nids, num);
3899         *nidsppp = NULL;
3900         return rc;
3901 }
3902
3903 static int handle_yaml_config_peer(struct cYAML *tree, struct cYAML **show_rc,
3904                                    struct cYAML **err_rc)
3905 {
3906         char **nids = NULL;
3907         int num, rc;
3908         struct cYAML *seq_no, *prim_nid, *non_mr, *ip2nets, *peer_nis;
3909         char err_str[LNET_MAX_STR_LEN];
3910
3911         seq_no = cYAML_get_object_item(tree, "seq_no");
3912         prim_nid = cYAML_get_object_item(tree, "primary nid");
3913         non_mr = cYAML_get_object_item(tree, "non_mr");
3914         ip2nets = cYAML_get_object_item(tree, "ip2nets");
3915         peer_nis = cYAML_get_object_item(tree, "peer ni");
3916
3917         if (ip2nets && (prim_nid || peer_nis)) {
3918                 rc = LUSTRE_CFG_RC_BAD_PARAM;
3919                 snprintf(err_str, sizeof(err_str),
3920                          "ip2nets can not be specified along side prim_nid"
3921                          " or peer ni fields");
3922                 cYAML_build_error(rc, (seq_no) ? seq_no->cy_valueint : -1,
3923                                   ADD_CMD, "peer", err_str, err_rc);
3924                 return rc;
3925         }
3926
3927         num = yaml_copy_peer_nids((ip2nets) ? ip2nets : peer_nis, &nids,
3928                                   (prim_nid) ? prim_nid->cy_valuestring : NULL,
3929                                    false);
3930
3931         if (num < 0) {
3932                 snprintf(err_str, sizeof(err_str),
3933                          "error copying nids from YAML block");
3934                 cYAML_build_error(num, (seq_no) ? seq_no->cy_valueint : -1,
3935                                   ADD_CMD, "peer", err_str, err_rc);
3936                 return num;
3937         }
3938
3939         rc = lustre_lnet_config_peer_nid((prim_nid) ? prim_nid->cy_valuestring : NULL,
3940                                          nids, num,
3941                                          (non_mr) ? false : true,
3942                                          (ip2nets) ? true : false,
3943                                          (seq_no) ? seq_no->cy_valueint : -1,
3944                                          err_rc);
3945
3946         yaml_free_string_array(nids, num);
3947         return rc;
3948 }
3949
3950 static int handle_yaml_del_peer(struct cYAML *tree, struct cYAML **show_rc,
3951                                 struct cYAML **err_rc)
3952 {
3953         char **nids = NULL;
3954         int num, rc;
3955         struct cYAML *seq_no, *prim_nid, *ip2nets, *peer_nis;
3956         char err_str[LNET_MAX_STR_LEN];
3957
3958         seq_no = cYAML_get_object_item(tree, "seq_no");
3959         prim_nid = cYAML_get_object_item(tree, "primary nid");
3960         ip2nets = cYAML_get_object_item(tree, "ip2nets");
3961         peer_nis = cYAML_get_object_item(tree, "peer ni");
3962
3963         if (ip2nets && (prim_nid || peer_nis)) {
3964                 rc = LUSTRE_CFG_RC_BAD_PARAM;
3965                 snprintf(err_str, sizeof(err_str),
3966                          "ip2nets can not be specified along side prim_nid"
3967                          " or peer ni fields");
3968                 cYAML_build_error(rc, (seq_no) ? seq_no->cy_valueint : -1,
3969                                   DEL_CMD, "peer", err_str, err_rc);
3970                 return rc;
3971         }
3972
3973         num = yaml_copy_peer_nids((ip2nets) ? ip2nets : peer_nis , &nids,
3974                                   (prim_nid) ? prim_nid->cy_valuestring : NULL,
3975                                   true);
3976         if (num < 0) {
3977                 snprintf(err_str, sizeof(err_str),
3978                          "error copying nids from YAML block");
3979                 cYAML_build_error(num, (seq_no) ? seq_no->cy_valueint : -1,
3980                                   ADD_CMD, "peer", err_str, err_rc);
3981                 return num;
3982         }
3983
3984         rc = lustre_lnet_del_peer_nid((prim_nid) ? prim_nid->cy_valuestring : NULL,
3985                                       nids, num, (ip2nets) ? true : false,
3986                                       (seq_no) ? seq_no->cy_valueint : -1,
3987                                       err_rc);
3988
3989         yaml_free_string_array(nids, num);
3990         return rc;
3991 }
3992
3993 static int handle_yaml_config_buffers(struct cYAML *tree,
3994                                       struct cYAML **show_rc,
3995                                       struct cYAML **err_rc)
3996 {
3997         int rc;
3998         struct cYAML *tiny, *small, *large, *seq_no;
3999
4000         tiny = cYAML_get_object_item(tree, "tiny");
4001         small = cYAML_get_object_item(tree, "small");
4002         large = cYAML_get_object_item(tree, "large");
4003         seq_no = cYAML_get_object_item(tree, "seq_no");
4004
4005         rc = lustre_lnet_config_buffers((tiny) ? tiny->cy_valueint : -1,
4006                                         (small) ? small->cy_valueint : -1,
4007                                         (large) ? large->cy_valueint : -1,
4008                                         (seq_no) ? seq_no->cy_valueint : -1,
4009                                         err_rc);
4010
4011         return rc;
4012 }
4013
4014 static int handle_yaml_config_routing(struct cYAML *tree,
4015                                       struct cYAML **show_rc,
4016                                       struct cYAML **err_rc)
4017 {
4018         int rc = LUSTRE_CFG_RC_NO_ERR;
4019         struct cYAML *seq_no, *enable;
4020
4021         seq_no = cYAML_get_object_item(tree, "seq_no");
4022         enable = cYAML_get_object_item(tree, "enable");
4023
4024         if (enable) {
4025                 rc = lustre_lnet_enable_routing(enable->cy_valueint,
4026                                                 (seq_no) ?
4027                                                     seq_no->cy_valueint : -1,
4028                                                 err_rc);
4029         }
4030
4031         return rc;
4032 }
4033
4034 static int handle_yaml_del_route(struct cYAML *tree, struct cYAML **show_rc,
4035                                  struct cYAML **err_rc)
4036 {
4037         struct cYAML *net;
4038         struct cYAML *gw;
4039         struct cYAML *seq_no;
4040
4041         net = cYAML_get_object_item(tree, "net");
4042         gw = cYAML_get_object_item(tree, "gateway");
4043         seq_no = cYAML_get_object_item(tree, "seq_no");
4044
4045         return lustre_lnet_del_route((net) ? net->cy_valuestring : NULL,
4046                                      (gw) ? gw->cy_valuestring : NULL,
4047                                      (seq_no) ? seq_no->cy_valueint : -1,
4048                                      err_rc);
4049 }
4050
4051 static int handle_yaml_del_routing(struct cYAML *tree, struct cYAML **show_rc,
4052                                    struct cYAML **err_rc)
4053 {
4054         struct cYAML *seq_no;
4055
4056         seq_no = cYAML_get_object_item(tree, "seq_no");
4057
4058         return lustre_lnet_enable_routing(0, (seq_no) ?
4059                                                 seq_no->cy_valueint : -1,
4060                                         err_rc);
4061 }
4062
4063 static int handle_yaml_show_route(struct cYAML *tree, struct cYAML **show_rc,
4064                                   struct cYAML **err_rc)
4065 {
4066         struct cYAML *net;
4067         struct cYAML *gw;
4068         struct cYAML *hop;
4069         struct cYAML *prio;
4070         struct cYAML *detail;
4071         struct cYAML *seq_no;
4072
4073         net = cYAML_get_object_item(tree, "net");
4074         gw = cYAML_get_object_item(tree, "gateway");
4075         hop = cYAML_get_object_item(tree, "hop");
4076         prio = cYAML_get_object_item(tree, "priority");
4077         detail = cYAML_get_object_item(tree, "detail");
4078         seq_no = cYAML_get_object_item(tree, "seq_no");
4079
4080         return lustre_lnet_show_route((net) ? net->cy_valuestring : NULL,
4081                                       (gw) ? gw->cy_valuestring : NULL,
4082                                       (hop) ? hop->cy_valueint : -1,
4083                                       (prio) ? prio->cy_valueint : -1,
4084                                       (detail) ? detail->cy_valueint : 0,
4085                                       (seq_no) ? seq_no->cy_valueint : -1,
4086                                       show_rc, err_rc, false);
4087 }
4088
4089 static int handle_yaml_show_net(struct cYAML *tree, struct cYAML **show_rc,
4090                                 struct cYAML **err_rc)
4091 {
4092         struct cYAML *net, *detail, *seq_no;
4093
4094         net = cYAML_get_object_item(tree, "net");
4095         detail = cYAML_get_object_item(tree, "detail");
4096         seq_no = cYAML_get_object_item(tree, "seq_no");
4097
4098         return lustre_lnet_show_net((net) ? net->cy_valuestring : NULL,
4099                                     (detail) ? detail->cy_valueint : 0,
4100                                     (seq_no) ? seq_no->cy_valueint : -1,
4101                                     show_rc, err_rc, false);
4102 }
4103
4104 static int handle_yaml_show_routing(struct cYAML *tree, struct cYAML **show_rc,
4105                                     struct cYAML **err_rc)
4106 {
4107         struct cYAML *seq_no;
4108
4109         seq_no = cYAML_get_object_item(tree, "seq_no");
4110
4111         return lustre_lnet_show_routing((seq_no) ? seq_no->cy_valueint : -1,
4112                                         show_rc, err_rc, false);
4113 }
4114
4115 static int handle_yaml_show_peers(struct cYAML *tree, struct cYAML **show_rc,
4116                                   struct cYAML **err_rc)
4117 {
4118         struct cYAML *seq_no, *nid, *detail;
4119
4120         seq_no = cYAML_get_object_item(tree, "seq_no");
4121         detail = cYAML_get_object_item(tree, "detail");
4122         nid = cYAML_get_object_item(tree, "nid");
4123
4124         return lustre_lnet_show_peer((nid) ? nid->cy_valuestring : NULL,
4125                                      (detail) ? detail->cy_valueint : 0,
4126                                      (seq_no) ? seq_no->cy_valueint : -1,
4127                                      show_rc, err_rc, false);
4128 }
4129
4130 static int handle_yaml_show_stats(struct cYAML *tree, struct cYAML **show_rc,
4131                                   struct cYAML **err_rc)
4132 {
4133         struct cYAML *seq_no;
4134
4135         seq_no = cYAML_get_object_item(tree, "seq_no");
4136
4137         return lustre_lnet_show_stats((seq_no) ? seq_no->cy_valueint : -1,
4138                                       show_rc, err_rc);
4139 }
4140
4141 static int handle_yaml_config_numa(struct cYAML *tree, struct cYAML **show_rc,
4142                                   struct cYAML **err_rc)
4143 {
4144         struct cYAML *seq_no, *range;
4145
4146         seq_no = cYAML_get_object_item(tree, "seq_no");
4147         range = cYAML_get_object_item(tree, "range");
4148
4149         return lustre_lnet_config_numa_range(range ? range->cy_valueint : -1,
4150                                              seq_no ? seq_no->cy_valueint : -1,
4151                                              err_rc);
4152 }
4153
4154 static int handle_yaml_del_numa(struct cYAML *tree, struct cYAML **show_rc,
4155                                struct cYAML **err_rc)
4156 {
4157         struct cYAML *seq_no;
4158
4159         seq_no = cYAML_get_object_item(tree, "seq_no");
4160
4161         return lustre_lnet_config_numa_range(0, seq_no ? seq_no->cy_valueint : -1,
4162                                              err_rc);
4163 }
4164
4165 static int handle_yaml_show_numa(struct cYAML *tree, struct cYAML **show_rc,
4166                                 struct cYAML **err_rc)
4167 {
4168         struct cYAML *seq_no;
4169
4170         seq_no = cYAML_get_object_item(tree, "seq_no");
4171
4172         return lustre_lnet_show_numa_range(seq_no ? seq_no->cy_valueint : -1,
4173                                            show_rc, err_rc);
4174 }
4175
4176 static int handle_yaml_config_global_settings(struct cYAML *tree,
4177                                               struct cYAML **show_rc,
4178                                               struct cYAML **err_rc)
4179 {
4180         struct cYAML *max_intf, *numa, *discovery, *retry, *tto, *seq_no;
4181         int rc = 0;
4182
4183         seq_no = cYAML_get_object_item(tree, "seq_no");
4184         max_intf = cYAML_get_object_item(tree, "max_intf");
4185         if (max_intf)
4186                 rc = lustre_lnet_config_max_intf(max_intf->cy_valueint,
4187                                                  seq_no ? seq_no->cy_valueint
4188                                                         : -1,
4189                                                  err_rc);
4190
4191         numa = cYAML_get_object_item(tree, "numa_range");
4192         if (numa)
4193                 rc = lustre_lnet_config_numa_range(numa->cy_valueint,
4194                                                    seq_no ? seq_no->cy_valueint
4195                                                         : -1,
4196                                                    err_rc);
4197
4198         discovery = cYAML_get_object_item(tree, "discovery");
4199         if (discovery)
4200                 rc = lustre_lnet_config_discovery(discovery->cy_valueint,
4201                                                   seq_no ? seq_no->cy_valueint
4202                                                         : -1,
4203                                                   err_rc);
4204
4205         retry = cYAML_get_object_item(tree, "retry_count");
4206         if (retry)
4207                 rc = lustre_lnet_config_retry_count(retry->cy_valueint,
4208                                                     seq_no ? seq_no->cy_valueint
4209                                                         : -1,
4210                                                     err_rc);
4211
4212         tto = cYAML_get_object_item(tree, "transaction_timeout");
4213         if (tto)
4214                 rc = lustre_lnet_config_transaction_to(tto->cy_valueint,
4215                                                        seq_no ? seq_no->cy_valueint
4216                                                                 : -1,
4217                                                        err_rc);
4218
4219         return rc;
4220 }
4221
4222 static int handle_yaml_del_global_settings(struct cYAML *tree,
4223                                            struct cYAML **show_rc,
4224                                            struct cYAML **err_rc)
4225 {
4226         struct cYAML *max_intf, *numa, *discovery, *seq_no;
4227         int rc = 0;
4228
4229         seq_no = cYAML_get_object_item(tree, "seq_no");
4230         max_intf = cYAML_get_object_item(tree, "max_intf");
4231         if (max_intf)
4232                 rc = lustre_lnet_config_max_intf(LNET_INTERFACES_MAX_DEFAULT,
4233                                                  seq_no ? seq_no->cy_valueint
4234                                                         : -1,
4235                                                  err_rc);
4236
4237         numa = cYAML_get_object_item(tree, "numa_range");
4238         if (numa)
4239                 rc = lustre_lnet_config_numa_range(0,
4240                                                    seq_no ? seq_no->cy_valueint
4241                                                         : -1,
4242                                                    err_rc);
4243
4244         /* peer discovery is enabled by default */
4245         discovery = cYAML_get_object_item(tree, "discovery");
4246         if (discovery)
4247                 rc = lustre_lnet_config_discovery(1,
4248                                                   seq_no ? seq_no->cy_valueint
4249                                                         : -1,
4250                                                   err_rc);
4251
4252         return rc;
4253 }
4254
4255 static int handle_yaml_show_global_settings(struct cYAML *tree,
4256                                             struct cYAML **show_rc,
4257                                             struct cYAML **err_rc)
4258 {
4259         struct cYAML *max_intf, *numa, *discovery, *retry, *tto, *seq_no;
4260         int rc = 0;
4261
4262         seq_no = cYAML_get_object_item(tree, "seq_no");
4263         max_intf = cYAML_get_object_item(tree, "max_intf");
4264         if (max_intf)
4265                 rc = lustre_lnet_show_max_intf(seq_no ? seq_no->cy_valueint
4266                                                         : -1,
4267                                                 show_rc, err_rc);
4268
4269         numa = cYAML_get_object_item(tree, "numa_range");
4270         if (numa)
4271                 rc = lustre_lnet_show_numa_range(seq_no ? seq_no->cy_valueint
4272                                                         : -1,
4273                                                  show_rc, err_rc);
4274
4275         discovery = cYAML_get_object_item(tree, "discovery");
4276         if (discovery)
4277                 rc = lustre_lnet_show_discovery(seq_no ? seq_no->cy_valueint
4278                                                         : -1,
4279                                                 show_rc, err_rc);
4280
4281         retry = cYAML_get_object_item(tree, "retry_count");
4282         if (retry)
4283                 rc = lustre_lnet_show_retry_count(seq_no ? seq_no->cy_valueint
4284                                                         : -1,
4285                                                   show_rc, err_rc);
4286
4287         tto = cYAML_get_object_item(tree, "transaction_timeout");
4288         if (tto)
4289                 rc = lustre_lnet_show_transaction_to(seq_no ? seq_no->cy_valueint
4290                                                         : -1,
4291                                                      show_rc, err_rc);
4292
4293         return rc;
4294 }
4295
4296 static int handle_yaml_ping(struct cYAML *tree, struct cYAML **show_rc,
4297                             struct cYAML **err_rc)
4298 {
4299         struct cYAML *seq_no, *nid, *timeout;
4300
4301         seq_no = cYAML_get_object_item(tree, "seq_no");
4302         nid = cYAML_get_object_item(tree, "primary nid");
4303         timeout = cYAML_get_object_item(tree, "timeout");
4304
4305         return lustre_lnet_ping_nid((nid) ? nid->cy_valuestring : NULL,
4306                                     (timeout) ? timeout->cy_valueint : 1000,
4307                                     (seq_no) ? seq_no->cy_valueint : -1,
4308                                     show_rc, err_rc);
4309 }
4310
4311 static int handle_yaml_discover(struct cYAML *tree, struct cYAML **show_rc,
4312                                 struct cYAML **err_rc)
4313 {
4314         struct cYAML *seq_no, *nid, *force;
4315
4316         seq_no = cYAML_get_object_item(tree, "seq_no");
4317         nid = cYAML_get_object_item(tree, "primary nid");
4318         force = cYAML_get_object_item(tree, "force");
4319
4320         return lustre_lnet_discover_nid((nid) ? nid->cy_valuestring : NULL,
4321                                         (force) ? force->cy_valueint : 0,
4322                                         (seq_no) ? seq_no->cy_valueint : -1,
4323                                         show_rc, err_rc);
4324 }
4325
4326 static int handle_yaml_no_op()
4327 {
4328         return LUSTRE_CFG_RC_NO_ERR;
4329 }
4330
4331 struct lookup_cmd_hdlr_tbl {
4332         char *name;
4333         cmd_handler_t cb;
4334 };
4335
4336 static struct lookup_cmd_hdlr_tbl lookup_config_tbl[] = {
4337         { .name = "route",      .cb = handle_yaml_config_route },
4338         { .name = "net",        .cb = handle_yaml_config_ni },
4339         { .name = "ip2nets",    .cb = handle_yaml_config_ip2nets },
4340         { .name = "peer",       .cb = handle_yaml_config_peer },
4341         { .name = "routing",    .cb = handle_yaml_config_routing },
4342         { .name = "buffers",    .cb = handle_yaml_config_buffers },
4343         { .name = "statistics", .cb = handle_yaml_no_op },
4344         { .name = "global",     .cb = handle_yaml_config_global_settings},
4345         { .name = "numa",       .cb = handle_yaml_config_numa },
4346         { .name = "ping",       .cb = handle_yaml_no_op },
4347         { .name = "discover",   .cb = handle_yaml_no_op },
4348         { .name = NULL } };
4349
4350 static struct lookup_cmd_hdlr_tbl lookup_del_tbl[] = {
4351         { .name = "route",      .cb = handle_yaml_del_route },
4352         { .name = "net",        .cb = handle_yaml_del_ni },
4353         { .name = "ip2nets",    .cb = handle_yaml_no_op },
4354         { .name = "peer",       .cb = handle_yaml_del_peer },
4355         { .name = "routing",    .cb = handle_yaml_del_routing },
4356         { .name = "buffers",    .cb = handle_yaml_no_op },
4357         { .name = "statistics", .cb = handle_yaml_no_op },
4358         { .name = "global",     .cb = handle_yaml_del_global_settings},
4359         { .name = "numa",       .cb = handle_yaml_del_numa },
4360         { .name = "ping",       .cb = handle_yaml_no_op },
4361         { .name = "discover",   .cb = handle_yaml_no_op },
4362         { .name = NULL } };
4363
4364 static struct lookup_cmd_hdlr_tbl lookup_show_tbl[] = {
4365         { .name = "route",      .cb = handle_yaml_show_route },
4366         { .name = "net",        .cb = handle_yaml_show_net },
4367         { .name = "peer",       .cb = handle_yaml_show_peers },
4368         { .name = "ip2nets",    .cb = handle_yaml_no_op },
4369         { .name = "routing",    .cb = handle_yaml_show_routing },
4370         { .name = "buffers",    .cb = handle_yaml_show_routing },
4371         { .name = "statistics", .cb = handle_yaml_show_stats },
4372         { .name = "global",     .cb = handle_yaml_show_global_settings},
4373         { .name = "numa",       .cb = handle_yaml_show_numa },
4374         { .name = "ping",       .cb = handle_yaml_no_op },
4375         { .name = "discover",   .cb = handle_yaml_no_op },
4376         { .name = NULL } };
4377
4378 static struct lookup_cmd_hdlr_tbl lookup_exec_tbl[] = {
4379         { .name = "route",      .cb = handle_yaml_no_op },
4380         { .name = "net",        .cb = handle_yaml_no_op },
4381         { .name = "peer",       .cb = handle_yaml_no_op },
4382         { .name = "ip2nets",    .cb = handle_yaml_no_op },
4383         { .name = "routing",    .cb = handle_yaml_no_op },
4384         { .name = "buffers",    .cb = handle_yaml_no_op },
4385         { .name = "statistics", .cb = handle_yaml_no_op },
4386         { .name = "global",     .cb = handle_yaml_no_op },
4387         { .name = "numa",       .cb = handle_yaml_no_op },
4388         { .name = "ping",       .cb = handle_yaml_ping },
4389         { .name = "discover",   .cb = handle_yaml_discover },
4390         { .name = NULL } };
4391
4392 static cmd_handler_t lookup_fn(char *key,
4393                                struct lookup_cmd_hdlr_tbl *tbl)
4394 {
4395         int i;
4396         if (key == NULL)
4397                 return NULL;
4398
4399         for (i = 0; tbl[i].name != NULL; i++) {
4400                 if (strncmp(key, tbl[i].name, strlen(tbl[i].name)) == 0)
4401                         return tbl[i].cb;
4402         }
4403
4404         return NULL;
4405 }
4406
4407 static int lustre_yaml_cb_helper(char *f, struct lookup_cmd_hdlr_tbl *table,
4408                                  struct cYAML **show_rc, struct cYAML **err_rc)
4409 {
4410         struct cYAML *tree, *item = NULL, *head, *child;
4411         cmd_handler_t cb;
4412         char err_str[LNET_MAX_STR_LEN];
4413         int rc = LUSTRE_CFG_RC_NO_ERR, return_rc = LUSTRE_CFG_RC_NO_ERR;
4414
4415         tree = cYAML_build_tree(f, NULL, 0, err_rc, false);
4416         if (tree == NULL)
4417                 return LUSTRE_CFG_RC_BAD_PARAM;
4418
4419         child = tree->cy_child;
4420         while (child != NULL) {
4421                 cb = lookup_fn(child->cy_string, table);
4422                 if (cb == NULL) {
4423                         snprintf(err_str, sizeof(err_str),
4424                                 "\"call back for '%s' not found\"",
4425                                 child->cy_string);
4426                         cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
4427                                         "yaml", "helper", err_str, err_rc);
4428                         goto out;
4429                 }
4430
4431                 if (cYAML_is_sequence(child)) {
4432                         while ((head = cYAML_get_next_seq_item(child, &item))
4433                                != NULL) {
4434                                 rc = cb(head, show_rc, err_rc);
4435                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
4436                                         return_rc = rc;
4437                         }
4438                 } else {
4439                         rc = cb(child, show_rc, err_rc);
4440                         if (rc != LUSTRE_CFG_RC_NO_ERR)
4441                                 return_rc = rc;
4442                 }
4443                 item = NULL;
4444                 child = child->cy_next;
4445         }
4446
4447 out:
4448         cYAML_free_tree(tree);
4449
4450         return return_rc;
4451 }
4452
4453 int lustre_yaml_config(char *f, struct cYAML **err_rc)
4454 {
4455         return lustre_yaml_cb_helper(f, lookup_config_tbl,
4456                                      NULL, err_rc);
4457 }
4458
4459 int lustre_yaml_del(char *f, struct cYAML **err_rc)
4460 {
4461         return lustre_yaml_cb_helper(f, lookup_del_tbl,
4462                                      NULL, err_rc);
4463 }
4464
4465 int lustre_yaml_show(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
4466 {
4467         return lustre_yaml_cb_helper(f, lookup_show_tbl,
4468                                      show_rc, err_rc);
4469 }
4470
4471 int lustre_yaml_exec(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
4472 {
4473         return lustre_yaml_cb_helper(f, lookup_exec_tbl,
4474                                      show_rc, err_rc);
4475 }