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 <rdma/rdma_user_cm.h>
  54 #include "liblnetconfig.h"
  55 #include <glob.h>
  56 #include <libcfs/util/param.h>
  57
  58 #ifndef HAVE_USRSPC_RDMA_PS_TCP
  59 #define RDMA_PS_TCP 0x0106
  60 #endif
  61
  62 const char *gmsg_stat_names[] = {"sent_stats", "received_stats",
  63                                  "dropped_stats"};
  64
  65 /*
  66  * lustre_lnet_ip_range_descr
  67  *      Describes an IP range.
  68  *      Each octect is an expression
  69  */
  70 struct lustre_lnet_ip_range_descr {
  71         struct list_head ipr_entry;
  72         struct list_head ipr_expr;
  73 };
  74
  75 /*
  76  * lustre_lnet_ip2nets
  77  *      Describes an ip2nets rule. This can be on a list of rules.
  78  */
  79 struct lustre_lnet_ip2nets {
  80         struct lnet_dlc_network_descr ip2nets_net;
  81         struct list_head ip2nets_ip_ranges;
  82 };
  83
  84 int open_sysfs_file(const char *path, const char *attr, const int mode)
  85 {
  86         int fd;
  87         char filename[LNET_MAX_STR_LEN];
  88
  89         if (strlen(path) + strlen(attr) >= LNET_MAX_STR_LEN)
  90                 return -1;
  91
  92         snprintf(filename, sizeof(filename), "%s%s",
  93                  path, attr);
  94
  95         fd = open(filename, mode);
  96
  97         return fd;
  98 }
  99
 100 static int read_sysfs_file(const char *path, const char *attr,
 101                            void *val, const size_t size, const int nelem)
 102 {
 103         int fd;
 104         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
 105
 106         fd = open_sysfs_file(path, attr, O_RDONLY);
 107         if (fd == -1)
 108                 return LUSTRE_CFG_RC_NO_MATCH;
 109
 110         if (read(fd, val, size * nelem) == -1)
 111                 goto close_fd;
 112
 113         rc = LUSTRE_CFG_RC_NO_ERR;
 114
 115 close_fd:
 116         close(fd);
 117         return rc;
 118 }
 119
 120 static int write_sysfs_file(const char *path, const char *attr,
 121                             void *val, const size_t size, const int nelem)
 122 {
 123         int fd;
 124         int rc = LUSTRE_CFG_RC_GENERIC_ERR;
 125
 126         fd = open_sysfs_file(path, attr, O_WRONLY | O_TRUNC);
 127         if (fd == -1)
 128                 return LUSTRE_CFG_RC_NO_MATCH;
 129
 130         if (write(fd, val, size * nelem) == -1)
 131                 goto close_fd;
 132
 133         rc = LUSTRE_CFG_RC_NO_ERR;
 134
 135 close_fd:
 136         close(fd);
 137         return rc;
 138 }
 139
 140 /*
 141  * free_intf_descr
 142  *      frees the memory allocated for an intf descriptor.
 143  */
 144 void free_intf_descr(struct lnet_dlc_intf_descr *intf_descr)
 145 {
 146         if (!intf_descr)
 147                 return;
 148
 149         if (intf_descr->cpt_expr != NULL)
 150                 cfs_expr_list_free(intf_descr->cpt_expr);
 151         free(intf_descr);
 152 }
 153
 154 /*
 155  * lustre_lnet_add_ip_range
 156  * Formatting:
 157  *      given a string of the format:
 158  *      <expr.expr.expr.expr> parse each expr into
 159  *      a lustre_lnet_ip_range_descr structure and insert on the list.
 160  *
 161  *      This function is called from
 162  *              YAML on each ip-range.
 163  *              As a result of lnetctl command
 164  *              When building a NID or P2P selection rules
 165  */
 166 int lustre_lnet_add_ip_range(struct list_head *list, char *str_ip_range)
 167 {
 168         struct lustre_lnet_ip_range_descr *ip_range;
 169         int rc;
 170
 171         ip_range = calloc(1, sizeof(*ip_range));
 172         if (ip_range == NULL)
 173                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 174
 175         INIT_LIST_HEAD(&ip_range->ipr_entry);
 176         INIT_LIST_HEAD(&ip_range->ipr_expr);
 177
 178         rc = cfs_ip_addr_parse(str_ip_range, strlen(str_ip_range),
 179                                &ip_range->ipr_expr);
 180         if (rc != 0)
 181                 return LUSTRE_CFG_RC_BAD_PARAM;
 182
 183         list_add_tail(&ip_range->ipr_entry, list);
 184
 185         return LUSTRE_CFG_RC_NO_ERR;
 186 }
 187
 188 int lustre_lnet_add_intf_descr(struct list_head *list, char *intf, int len)
 189 {
 190         char *open_sq_bracket = NULL, *close_sq_bracket = NULL,
 191              *intf_name;
 192         struct lnet_dlc_intf_descr *intf_descr = NULL;
 193         int rc;
 194         char intf_string[LNET_MAX_STR_LEN];
 195
 196         if (len >= LNET_MAX_STR_LEN)
 197                 return LUSTRE_CFG_RC_BAD_PARAM;
 198
 199         strncpy(intf_string, intf, len);
 200         intf_string[len] = '\0';
 201
 202         intf_descr = calloc(1, sizeof(*intf_descr));
 203         if (intf_descr == NULL)
 204                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 205
 206         INIT_LIST_HEAD(&intf_descr->intf_on_network);
 207
 208         intf_name = intf_string;
 209         open_sq_bracket = strchr(intf_string, '[');
 210         if (open_sq_bracket != NULL) {
 211                 close_sq_bracket = strchr(intf_string, ']');
 212                 if (close_sq_bracket == NULL) {
 213                         free(intf_descr);
 214                         return LUSTRE_CFG_RC_BAD_PARAM;
 215                 }
 216                 rc = cfs_expr_list_parse(open_sq_bracket,
 217                                          strlen(open_sq_bracket), 0, UINT_MAX,
 218                                          &intf_descr->cpt_expr);
 219                 if (rc < 0) {
 220                         free(intf_descr);
 221                         return LUSTRE_CFG_RC_BAD_PARAM;
 222                 }
 223                 strncpy(intf_descr->intf_name, intf_name,
 224                         open_sq_bracket - intf_name);
 225                 intf_descr->intf_name[open_sq_bracket - intf_name] = '\0';
 226         } else {
 227                 strcpy(intf_descr->intf_name, intf_name);
 228                 intf_descr->cpt_expr = NULL;
 229         }
 230
 231         list_add_tail(&intf_descr->intf_on_network, list);
 232
 233         return LUSTRE_CFG_RC_NO_ERR;
 234 }
 235
 236 void lustre_lnet_init_nw_descr(struct lnet_dlc_network_descr *nw_descr)
 237 {
 238         if (nw_descr != NULL) {
 239                 nw_descr->nw_id = 0;
 240                 INIT_LIST_HEAD(&nw_descr->network_on_rule);
 241                 INIT_LIST_HEAD(&nw_descr->nw_intflist);
 242         }
 243 }
 244
 245 int lustre_lnet_parse_nidstr(char *nidstr, lnet_nid_t *lnet_nidlist,
 246                              int max_nids, char *err_str)
 247 {
 248         int rc, num_nids = 0;
 249         struct list_head nidlist;
 250
 251         if (!nidstr) {
 252                 snprintf(err_str, LNET_MAX_STR_LEN, "supplied nidstr is NULL");
 253                 return LUSTRE_CFG_RC_BAD_PARAM;
 254         }
 255
 256         if (strchr(nidstr, '*')) {
 257                 snprintf(err_str, LNET_MAX_STR_LEN,
 258                          "asterisk not allowed in nidstring \"%s\"", nidstr);
 259                 return LUSTRE_CFG_RC_BAD_PARAM;
 260         }
 261
 262         INIT_LIST_HEAD(&nidlist);
 263         rc = cfs_parse_nidlist(nidstr, strlen(nidstr), &nidlist);
 264         if (rc == 0) {
 265                 snprintf(err_str, LNET_MAX_STR_LEN,
 266                          "Unable to parse nidlist from: %s\n", nidstr);
 267                 return LUSTRE_CFG_RC_BAD_PARAM;
 268         }
 269
 270         if (list_empty(&nidlist)) {
 271                 snprintf(err_str, LNET_MAX_STR_LEN,
 272                          "\"%s\" does not specify any valid nid lists", nidstr);
 273                 return LUSTRE_CFG_RC_BAD_PARAM;
 274         }
 275
 276         num_nids = cfs_expand_nidlist(&nidlist, lnet_nidlist, max_nids);
 277         cfs_free_nidlist(&nidlist);
 278
 279         if (num_nids == -1) {
 280                 snprintf(err_str, LNET_MAX_STR_LEN,
 281                          "\"%s\" specifies more than the %d NIDs allowed by this operation.",
 282                          nidstr, max_nids);
 283                 return LUSTRE_CFG_RC_BAD_PARAM;
 284         }
 285
 286         if (num_nids < 0) {
 287                 snprintf(err_str, LNET_MAX_STR_LEN,
 288                          "Failed to expand nidstr: %s", strerror(num_nids));
 289                 return LUSTRE_CFG_RC_OUT_OF_MEM;
 290         }
 291
 292         if (num_nids == 0) {
 293                 snprintf(err_str, LNET_MAX_STR_LEN,
 294                          "\"%s\" did not expand to any nids", nidstr);
 295                 return LUSTRE_CFG_RC_BAD_PARAM;
 296         }
 297
 298         return num_nids;
 299 }
 300
 301 /*
 302  * format expected:
 303  *      <intf>[<expr>], <intf>[<expr>],..
 304  */
 305 int lustre_lnet_parse_interfaces(char *intf_str,
 306                                  struct lnet_dlc_network_descr *nw_descr)
 307 {
 308         char *open_square;
 309         char *close_square;
 310         char *comma;
 311         char *cur = intf_str, *next = NULL;
 312         char *end = intf_str + strlen(intf_str);
 313         int rc, len;
 314         struct lnet_dlc_intf_descr *intf_descr, *tmp;
 315
 316         if (nw_descr == NULL)
 317                 return LUSTRE_CFG_RC_BAD_PARAM;
 318
 319         while (cur < end) {
 320                 open_square = strchr(cur, '[');
 321                 if (open_square != NULL) {
 322                         close_square = strchr(cur, ']');
 323                         if (close_square == NULL) {
 324                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 325                                 goto failed;
 326                         }
 327
 328                         comma = strchr(cur, ',');
 329                         if (comma != NULL && comma > close_square) {
 330                                 next = comma + 1;
 331                                 len = next - close_square;
 332                         } else {
 333                                 len = strlen(cur);
 334                                 next = cur + len;
 335                         }
 336                 } else {
 337                         comma = strchr(cur, ',');
 338                         if (comma != NULL) {
 339                                 next = comma + 1;
 340                                 len = comma - cur;
 341                         } else {
 342                                 len = strlen(cur);
 343                                 next = cur + len;
 344                         }
 345                 }
 346
 347                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist, cur, len);
 348                 if (rc != LUSTRE_CFG_RC_NO_ERR)
 349                         goto failed;
 350
 351                 cur = next;
 352         }
 353
 354         return LUSTRE_CFG_RC_NO_ERR;
 355
 356 failed:
 357         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
 358                                  intf_on_network) {
 359                 list_del(&intf_descr->intf_on_network);
 360                 free_intf_descr(intf_descr);
 361         }
 362
 363         return rc;
 364 }
 365
 366 int lustre_lnet_config_lib_init(void)
 367 {
 368         return register_ioc_dev(LNET_DEV_ID, LNET_DEV_PATH);
 369 }
 370
 371 void lustre_lnet_config_lib_uninit(void)
 372 {
 373         unregister_ioc_dev(LNET_DEV_ID);
 374 }
 375
 376 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
 377                                  int seq_no, struct cYAML **err_rc)
 378 {
 379         struct libcfs_ioctl_data data;
 380         unsigned int opc;
 381         int rc;
 382         char err_str[LNET_MAX_STR_LEN] = "\"Success\"";
 383
 384         LIBCFS_IOC_INIT(data);
 385
 386         /* Reverse logic is used here in order not to change
 387          * the lctl utility */
 388         data.ioc_flags = load_ni_from_mod ? 0 : 1;
 389
 390         opc = up ? IOC_LIBCFS_CONFIGURE : IOC_LIBCFS_UNCONFIGURE;
 391
 392         rc = l_ioctl(LNET_DEV_ID, opc, &data);
 393         if (rc != 0) {
 394                 snprintf(err_str,
 395                         sizeof(err_str),
 396                         "\"LNet %s error: %s\"", (up) ? "configure" :
 397                         "unconfigure", strerror(errno));
 398                 rc = -errno;
 399         }
 400
 401         cYAML_build_error(rc, seq_no, (up) ? CONFIG_CMD : UNCONFIG_CMD,
 402                           "lnet", err_str, err_rc);
 403
 404         return rc;
 405 }
 406
 407 static int dispatch_peer_ni_cmd(__u32 cmd, struct lnet_ioctl_peer_cfg *data,
 408                                 char *err_str, char *cmd_str)
 409 {
 410         int rc;
 411
 412         rc = l_ioctl(LNET_DEV_ID, cmd, data);
 413         if (rc) {
 414                 rc = -errno;
 415                 snprintf(err_str, LNET_MAX_STR_LEN,
 416                          "\"%s peer ni operation failed: %s\"",
 417                          cmd_str, strerror(errno));
 418         }
 419
 420         return rc;
 421 }
 422
 423 static int infra_ping_nid(char *ping_nids, char *oper, int param, int ioc_call,
 424                           int seq_no, struct cYAML **show_rc,
 425                           struct cYAML **err_rc)
 426 {
 427         void *data = NULL;
 428         struct lnet_ioctl_ping_data ping;
 429         struct cYAML *root = NULL, *ping_node = NULL, *item = NULL,
 430                      *first_seq = NULL, *tmp = NULL, *peer_ni = NULL;
 431         struct lnet_process_id id;
 432         char err_str[LNET_MAX_STR_LEN] = {0};
 433         char *sep, *token, *end;
 434         char buf[6];
 435         size_t len;
 436         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 437         int i;
 438         bool flag = false;
 439
 440         len = (sizeof(struct lnet_process_id) * LNET_INTERFACES_MAX_DEFAULT);
 441
 442         data = calloc(1, len);
 443         if (data == NULL)
 444                 goto out;
 445
 446         /* create struct cYAML root object */
 447         root = cYAML_create_object(NULL, NULL);
 448         if (root == NULL)
 449                 goto out;
 450
 451         ping_node = cYAML_create_seq(root, oper);
 452         if (ping_node == NULL)
 453                 goto out;
 454
 455         /* tokenise each nid in string ping_nids */
 456         token = strtok(ping_nids, ",");
 457
 458         do {
 459                 item = cYAML_create_seq_item(ping_node);
 460                 if (item == NULL)
 461                         goto out;
 462
 463                 if (first_seq == NULL)
 464                         first_seq = item;
 465
 466                 /* check if '-' is a part of NID, token */
 467                 sep = strchr(token, '-');
 468                 if (sep == NULL) {
 469                         id.pid = LNET_PID_ANY;
 470                         /* if no net is specified, libcfs_str2nid() will assume tcp */
 471                         id.nid = libcfs_str2nid(token);
 472                         if (id.nid == LNET_NID_ANY) {
 473                                 snprintf(err_str, sizeof(err_str),
 474                                          "\"cannot parse NID '%s'\"",
 475                                          token);
 476                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 477                                 cYAML_build_error(rc, seq_no, MANAGE_CMD,
 478                                                   oper, err_str, err_rc);
 479                                 continue;
 480                         }
 481                 } else {
 482                         if (token[0] == 'u' || token[0] == 'U')
 483                                 id.pid = (strtoul(&token[1], &end, 0) |
 484                                           (LNET_PID_USERFLAG));
 485                         else
 486                                 id.pid = strtoul(token, &end, 0);
 487
 488                         /* assuming '-' is part of hostname */
 489                         if (end != sep) {
 490                                 id.pid = LNET_PID_ANY;
 491                                 id.nid = libcfs_str2nid(token);
 492                                 if (id.nid == LNET_NID_ANY) {
 493                                         snprintf(err_str, sizeof(err_str),
 494                                                  "\"cannot parse NID '%s'\"",
 495                                                  token);
 496                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 497                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 498                                                           oper, err_str,
 499                                                           err_rc);
 500                                         continue;
 501                                 }
 502                         } else {
 503                                 id.nid = libcfs_str2nid(sep + 1);
 504                                 if (id.nid == LNET_NID_ANY) {
 505                                         snprintf(err_str, sizeof(err_str),
 506                                                  "\"cannot parse NID '%s'\"",
 507                                                  token);
 508                                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 509                                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 510                                                           oper, err_str,
 511                                                           err_rc);
 512                                         continue;
 513                                 }
 514                         }
 515                 }
 516                 LIBCFS_IOC_INIT_V2(ping, ping_hdr);
 517                 ping.ping_hdr.ioc_len = sizeof(ping);
 518                 ping.ping_id          = id;
 519                 ping.op_param         = param;
 520                 ping.ping_count       = LNET_INTERFACES_MAX_DEFAULT;
 521                 ping.ping_buf         = data;
 522
 523                 rc = l_ioctl(LNET_DEV_ID, ioc_call, &ping);
 524                 if (rc != 0) {
 525                         snprintf(err_str,
 526                                  sizeof(err_str), "failed to %s %s: %s\n", oper,
 527                                  id.pid == LNET_PID_ANY ?
 528                                  libcfs_nid2str(id.nid) :
 529                                  libcfs_id2str(id), strerror(errno));
 530                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 531                         cYAML_build_error(rc, seq_no, MANAGE_CMD,
 532                                           oper, err_str, err_rc);
 533                         continue;
 534                 }
 535
 536                 if (cYAML_create_string(item, "primary nid",
 537                                         libcfs_nid2str(ping.ping_id.nid)) == NULL)
 538                         goto out;
 539
 540                 if (cYAML_create_string(item, "Multi-Rail", ping.mr_info ?
 541                                         "True" : "False") == NULL)
 542                         goto out;
 543
 544                 tmp = cYAML_create_seq(item, "peer ni");
 545                 if (tmp == NULL)
 546                         goto out;
 547
 548                 for (i = 0; i < ping.ping_count; i++) {
 549                         if (ping.ping_buf[i].nid == LNET_NID_LO_0)
 550                                 continue;
 551                         peer_ni = cYAML_create_seq_item(tmp);
 552                         if (peer_ni == NULL)
 553                                 goto out;
 554                         memset(buf, 0, sizeof buf);
 555                         snprintf(buf, sizeof buf, "nid");
 556                         if (cYAML_create_string(peer_ni, buf,
 557                                                 libcfs_nid2str(ping.ping_buf[i].nid)) == NULL)
 558                                 goto out;
 559                 }
 560
 561                 flag = true;
 562
 563         } while ((token = strtok(NULL, ",")) != NULL);
 564
 565         if (flag)
 566                 rc = LUSTRE_CFG_RC_NO_ERR;
 567
 568 out:
 569         if (data)
 570                 free(data);
 571         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
 572                 cYAML_free_tree(root);
 573         } else if (show_rc != NULL && *show_rc != NULL) {
 574                 struct cYAML *show_node;
 575                 show_node = cYAML_get_object_item(*show_rc, oper);
 576                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 577                         cYAML_insert_child(show_node, first_seq);
 578                         free(ping_node);
 579                         free(root);
 580                 } else if (show_node == NULL) {
 581                         cYAML_insert_sibling((*show_rc)->cy_child,
 582                                              ping_node);
 583                         free(root);
 584                 } else {
 585                         cYAML_free_tree(root);
 586                 }
 587         } else {
 588                 *show_rc = root;
 589         }
 590
 591         return rc;
 592 }
 593
 594 int lustre_lnet_ping_nid(char *ping_nids, int timeout, int seq_no,
 595                          struct cYAML **show_rc, struct cYAML **err_rc)
 596 {
 597         int rc;
 598
 599         rc = infra_ping_nid(ping_nids, "ping", timeout, IOC_LIBCFS_PING_PEER,
 600                             seq_no, show_rc, err_rc);
 601         return rc;
 602 }
 603
 604 int lustre_lnet_discover_nid(char *ping_nids, int force, int seq_no,
 605                          struct cYAML **show_rc, struct cYAML **err_rc)
 606 {
 607         int rc;
 608
 609         rc = infra_ping_nid(ping_nids, "discover", force, IOC_LIBCFS_DISCOVER,
 610                             seq_no, show_rc, err_rc);
 611         return rc;
 612 }
 613
 614 static int lustre_lnet_handle_peer_nidlist(lnet_nid_t *nidlist, int num_nids,
 615                                            bool is_mr, __u32 cmd,
 616                                            char *cmd_type, char *err_str)
 617 {
 618         struct lnet_ioctl_peer_cfg data;
 619         int rc, nid_idx;
 620
 621         if (cmd == IOC_LIBCFS_ADD_PEER_NI) {
 622                 /* When adding a peer we first need to create the peer using the
 623                  * specified (or implied) primary nid. Then we can add
 624                  * additional nids to this peer using the primary nid as a key
 625                  */
 626                 LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
 627                 data.prcfg_mr = is_mr;
 628                 data.prcfg_prim_nid = nidlist[0];
 629                 data.prcfg_cfg_nid = LNET_NID_ANY;
 630
 631                 rc = dispatch_peer_ni_cmd(cmd, &data, err_str, cmd_type);
 632
 633                 if (rc)
 634                         return rc;
 635         }
 636
 637         /* Add or delete any specified NIs associated with the specified
 638          * (or implied) primary nid
 639          */
 640         for (nid_idx = 1; nid_idx < num_nids; nid_idx++) {
 641                 LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
 642                 data.prcfg_mr = is_mr;
 643                 data.prcfg_prim_nid = nidlist[0];
 644                 data.prcfg_cfg_nid = nidlist[nid_idx];
 645
 646                 rc = dispatch_peer_ni_cmd(cmd, &data, err_str, cmd_type);
 647
 648                 if (rc)
 649                         return rc;
 650         }
 651
 652         if (cmd == IOC_LIBCFS_DEL_PEER_NI && num_nids == 1) {
 653                 /* In the delete case we may have been given just the
 654                  * primary nid of the peer. This tells us to delete the peer
 655                  * completely (rather than just delete some of its NIs)
 656                  */
 657                 LIBCFS_IOC_INIT_V2(data, prcfg_hdr);
 658                 data.prcfg_prim_nid = nidlist[0];
 659                 data.prcfg_cfg_nid = LNET_NID_ANY;
 660
 661                 rc = dispatch_peer_ni_cmd(cmd, &data, err_str, cmd_type);
 662         }
 663
 664         return rc;
 665 }
 666
 667 static int
 668 lustre_lnet_mod_peer_nidlist(lnet_nid_t pnid, lnet_nid_t *lnet_nidlist,
 669                              int cmd, int num_nids, bool is_mr, int seq_no,
 670                              struct cYAML **err_rc)
 671 {
 672         int rc = LUSTRE_CFG_RC_NO_ERR;
 673         char err_str[LNET_MAX_STR_LEN];
 674         lnet_nid_t *lnet_nidlist2 = NULL;
 675         int ioc_cmd = (cmd == LNETCTL_ADD_CMD) ? IOC_LIBCFS_ADD_PEER_NI :
 676                 IOC_LIBCFS_DEL_PEER_NI;
 677         char *cmd_str = (cmd == LNETCTL_ADD_CMD) ? ADD_CMD : DEL_CMD;
 678
 679         num_nids++;
 680         lnet_nidlist2 = calloc(sizeof(*lnet_nidlist2), num_nids);
 681         if (!lnet_nidlist2) {
 682                 snprintf(err_str, LNET_MAX_STR_LEN, "out of memory");
 683                 rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 684                 goto out;
 685         }
 686         lnet_nidlist2[0] = pnid;
 687         memcpy(&lnet_nidlist2[1], lnet_nidlist, sizeof(*lnet_nidlist) *
 688                                                 (num_nids - 1));
 689
 690         rc = lustre_lnet_handle_peer_nidlist(lnet_nidlist2,
 691                                              num_nids, is_mr, ioc_cmd,
 692                                              cmd_str, err_str);
 693 out:
 694         if (lnet_nidlist2)
 695                 free(lnet_nidlist2);
 696
 697         cYAML_build_error(rc, seq_no, cmd_str, "peer_ni", err_str, err_rc);
 698         return rc;
 699 }
 700
 701 static void
 702 replace_sep(char *str, char sep, char newsep)
 703 {
 704         int bracket = 0;
 705         int i;
 706         if (!str)
 707                 return;
 708         for (i = 0; i < strlen(str); i++) {
 709                 /* don't replace ',' within [] */
 710                 if (str[i] == '[')
 711                         bracket++;
 712                 else if (str[i] == ']')
 713                         bracket--;
 714                 else if (str[i] == sep && bracket == 0)
 715                         str[i] = newsep;
 716         }
 717 }
 718
 719 int lustre_lnet_modify_peer(char *prim_nid, char *nids, bool is_mr,
 720                             int cmd, int seq_no, struct cYAML **err_rc)
 721 {
 722         int num_nids, rc;
 723         char err_str[LNET_MAX_STR_LEN] = "Error";
 724         lnet_nid_t lnet_nidlist[LNET_MAX_NIDS_PER_PEER];
 725         lnet_nid_t pnid = LNET_NID_ANY;
 726
 727         if (!prim_nid) {
 728                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 729                 snprintf(err_str, LNET_MAX_STR_LEN,
 730                          "--prim_nid must be specified");
 731                 goto out;
 732         }
 733
 734         pnid = libcfs_str2nid(prim_nid);
 735         if (pnid == LNET_NID_ANY) {
 736                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 737                 snprintf(err_str, LNET_MAX_STR_LEN,
 738                         "badly formatted primary NID: %s", prim_nid);
 739                 goto out;
 740         }
 741
 742         num_nids = 0;
 743         if (nids) {
 744                 /*
 745                 * if there is no primary nid we need to make the first nid in the
 746                 * nids list the primary nid
 747                 */
 748                 replace_sep(nids, ',', ' ');
 749                 rc = lustre_lnet_parse_nidstr(nids, lnet_nidlist,
 750                                         LNET_MAX_NIDS_PER_PEER, err_str);
 751                 if (rc < 0)
 752                         goto out;
 753
 754                 num_nids = rc;
 755         }
 756
 757         rc = lustre_lnet_mod_peer_nidlist(pnid, lnet_nidlist,
 758                                           cmd, num_nids, is_mr,
 759                                           -1, err_rc);
 760
 761 out:
 762         if (rc != LUSTRE_CFG_RC_NO_ERR)
 763                 cYAML_build_error(rc, -1, "peer",
 764                                 cmd == LNETCTL_ADD_CMD ? "add" : "del",
 765                                 err_str, err_rc);
 766
 767         return rc;
 768 }
 769
 770 int lustre_lnet_route_common(char *nw, char *nidstr, int hops, int prio,
 771                              int sen, int seq_no, struct cYAML **err_rc,
 772                              int cmd)
 773 {
 774         int rc, num_nids, idx;
 775         __u32 rnet;
 776         char err_str[LNET_MAX_STR_LEN] = "\"generic error\"";
 777         struct lnet_ioctl_config_data data;
 778         lnet_nid_t lnet_nidlist[LNET_MAX_NIDS_PER_PEER];
 779
 780         if (nw == NULL || nidstr == NULL) {
 781                 snprintf(err_str, LNET_MAX_STR_LEN,
 782                          "\"missing mandatory parameter:'%s'\"",
 783                          (nw == NULL && nidstr == NULL) ? "network, gateway" :
 784                          (nw == NULL) ? "network" : "gateway");
 785                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 786                 goto out;
 787         }
 788
 789         rnet = libcfs_str2net(nw);
 790         if (rnet == LNET_NET_ANY) {
 791                 snprintf(err_str, LNET_MAX_STR_LEN,
 792                          "\"cannot parse remote net %s\"", nw);
 793                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 794                 goto out;
 795         }
 796
 797         replace_sep(nidstr, ',', ' ');
 798         rc = lustre_lnet_parse_nidstr(nidstr, lnet_nidlist,
 799                                       LNET_MAX_NIDS_PER_PEER, err_str);
 800         if (rc < 0)
 801                 goto out;
 802
 803         num_nids = rc;
 804
 805         for (idx = 0; idx < num_nids; idx++) {
 806                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 807                 data.cfg_net = rnet;
 808                 if (cmd == LNETCTL_ADD_CMD) {
 809                         data.cfg_config_u.cfg_route.rtr_hop = hops;
 810                         data.cfg_config_u.cfg_route.rtr_priority = prio;
 811                         data.cfg_config_u.cfg_route.rtr_sensitivity = sen;
 812                 }
 813
 814                 data.cfg_nid = lnet_nidlist[idx];
 815
 816                 if (cmd == LNETCTL_ADD_CMD)
 817                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_ROUTE,
 818                                         &data);
 819                 else
 820                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_ROUTE,
 821                                         &data);
 822
 823                 if (rc != 0 && errno != EEXIST &&
 824                         errno != EHOSTUNREACH) {
 825                         rc = -errno;
 826                         snprintf(err_str, LNET_MAX_STR_LEN,
 827                                         "route operation failed: %s",
 828                                         strerror(errno));
 829                         goto out;
 830                 } else if (errno == EEXIST) {
 831                         /*
 832                          * continue chugging along if one of the
 833                          * routes already exists
 834                          */
 835                         rc = 0;
 836                 }
 837         }
 838
 839 out:
 840         cYAML_build_error(rc, seq_no,
 841                           cmd == LNETCTL_ADD_CMD ? ADD_CMD : DEL_CMD, "route",
 842                           err_str, err_rc);
 843
 844         return rc;
 845 }
 846
 847 int lustre_lnet_config_route(char *nw, char *nidstr, int hops, int prio,
 848                              int sen, int seq_no, struct cYAML **err_rc)
 849 {
 850         int rc;
 851         char err_str[LNET_MAX_STR_LEN] = "\"generic error\"";
 852
 853         if (hops == -1) {
 854                 hops = LNET_UNDEFINED_HOPS;
 855         } else if (hops < 1 || hops > 255) {
 856                 snprintf(err_str, LNET_MAX_STR_LEN,
 857                          "\"invalid hop count %d, must be between 1 and 255\"",
 858                          hops);
 859                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 860                 goto out;
 861         }
 862
 863         if (prio == -1) {
 864                 prio = 0;
 865         } else if (prio < 0) {
 866                 snprintf(err_str, LNET_MAX_STR_LEN,
 867                          "\"invalid priority %d, must be greater than 0\"",
 868                          prio);
 869                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 870                 goto out;
 871         }
 872
 873         if (sen == -1) {
 874                 sen = 1;
 875         } else if (sen < 1) {
 876                 snprintf(err_str, LNET_MAX_STR_LEN,
 877                          "\"invalid health sensitivity %d, must be 1 or greater\"",
 878                          sen);
 879                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 880                 goto out;
 881         }
 882
 883         rc = lustre_lnet_route_common(nw, nidstr, hops, prio, sen, seq_no,
 884                                       err_rc, LNETCTL_ADD_CMD);
 885         return rc;
 886 out:
 887         cYAML_build_error(rc, seq_no, ADD_CMD, "route", err_str, err_rc);
 888
 889         return rc;
 890 }
 891
 892 int lustre_lnet_del_route(char *nw, char *nidstr, int seq_no,
 893                           struct cYAML **err_rc)
 894 {
 895         return lustre_lnet_route_common(nw, nidstr, 0, 0, 0, seq_no, err_rc,
 896                                         LNETCTL_DEL_CMD);
 897 }
 898
 899 int lustre_lnet_show_route(char *nw, char *gw, int hops, int prio, int detail,
 900                            int seq_no, struct cYAML **show_rc,
 901                            struct cYAML **err_rc, bool backup)
 902 {
 903         struct lnet_ioctl_config_data data;
 904         lnet_nid_t gateway_nid;
 905         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 906         int l_errno = 0;
 907         __u32 net = LNET_NET_ANY;
 908         int i;
 909         struct cYAML *root = NULL, *route = NULL, *item = NULL;
 910         struct cYAML *first_seq = NULL;
 911         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
 912         bool exist = false;
 913
 914         if (nw != NULL) {
 915                 net = libcfs_str2net(nw);
 916                 if (net == LNET_NET_ANY) {
 917                         snprintf(err_str,
 918                                  sizeof(err_str),
 919                                  "\"cannot parse net '%s'\"", nw);
 920                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 921                         goto out;
 922                 }
 923
 924         } else {
 925                 /* show all routes without filtering on net */
 926                 net = LNET_NET_ANY;
 927         }
 928
 929         if (gw != NULL) {
 930                 gateway_nid = libcfs_str2nid(gw);
 931                 if (gateway_nid == LNET_NID_ANY) {
 932                         snprintf(err_str,
 933                                  sizeof(err_str),
 934                                  "\"cannot parse gateway NID '%s'\"", gw);
 935                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 936                         goto out;
 937                 }
 938         } else
 939                 /* show all routes with out filtering on gateway */
 940                 gateway_nid = LNET_NID_ANY;
 941
 942         if ((hops < 1 && hops != -1) || hops > 255) {
 943                 snprintf(err_str,
 944                          sizeof(err_str),
 945                          "\"invalid hop count %d, must be between 0 and 256\"",
 946                          hops);
 947                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 948                 goto out;
 949         }
 950
 951         /* create struct cYAML root object */
 952         root = cYAML_create_object(NULL, NULL);
 953         if (root == NULL)
 954                 goto out;
 955
 956         route = cYAML_create_seq(root, "route");
 957         if (route == NULL)
 958                 goto out;
 959
 960         for (i = 0;; i++) {
 961                 __u32 rt_alive;
 962                 __u32 rt_multi_hop;
 963
 964                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 965                 data.cfg_count = i;
 966
 967                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_ROUTE, &data);
 968                 if (rc != 0) {
 969                         l_errno = errno;
 970                         break;
 971                 }
 972
 973                 /* filter on provided data */
 974                 if (net != LNET_NET_ANY &&
 975                     net != data.cfg_net)
 976                         continue;
 977
 978                 if (gateway_nid != LNET_NID_ANY &&
 979                     gateway_nid != data.cfg_nid)
 980                         continue;
 981
 982                 if (hops != -1 &&
 983                     hops != data.cfg_config_u.cfg_route.rtr_hop)
 984                         continue;
 985
 986                 if (prio != -1 &&
 987                     prio != data.cfg_config_u.cfg_route.rtr_priority)
 988                         continue;
 989
 990                 /* default rc to -1 incase we hit the goto */
 991                 rc = -1;
 992                 exist = true;
 993
 994                 item = cYAML_create_seq_item(route);
 995                 if (item == NULL)
 996                         goto out;
 997
 998                 if (first_seq == NULL)
 999                         first_seq = item;
1000
1001                 if (cYAML_create_string(item, "net",
1002                                         libcfs_net2str(data.cfg_net)) == NULL)
1003                         goto out;
1004
1005                 if (cYAML_create_string(item, "gateway",
1006                                         libcfs_nid2str(data.cfg_nid)) == NULL)
1007                         goto out;
1008
1009                 if (detail) {
1010                         if (cYAML_create_number(item, "hop",
1011                                                 (int) data.cfg_config_u.
1012                                                 cfg_route.rtr_hop) ==
1013                             NULL)
1014                                 goto out;
1015
1016                         if (cYAML_create_number(item, "priority",
1017                                                 data.cfg_config_u.
1018                                                 cfg_route.rtr_priority) == NULL)
1019                                 goto out;
1020
1021                         if (cYAML_create_number(item, "health_sensitivity",
1022                                                 data.cfg_config_u.
1023                                                 cfg_route.rtr_sensitivity) == NULL)
1024                                 goto out;
1025
1026                         rt_alive = data.cfg_config_u.cfg_route.rtr_flags &
1027                                         LNET_RT_ALIVE;
1028                         rt_multi_hop = data.cfg_config_u.cfg_route.rtr_flags &
1029                                         LNET_RT_MULTI_HOP;
1030
1031                         if (!backup &&
1032                             cYAML_create_string(item, "state",
1033                                                 rt_alive ?
1034                                                 "up" : "down") == NULL)
1035                                 goto out;
1036
1037                         if (!backup &&
1038                             cYAML_create_string(item, "type",
1039                                                 rt_multi_hop?
1040                                                 "multi-hop" : "single-hop") == NULL)
1041                                 goto out;
1042                 }
1043         }
1044
1045         /* print output iff show_rc is not provided */
1046         if (show_rc == NULL)
1047                 cYAML_print_tree(root);
1048
1049         if (l_errno != ENOENT) {
1050                 snprintf(err_str,
1051                          sizeof(err_str),
1052                          "\"cannot get routes: %s\"",
1053                          strerror(l_errno));
1054                 rc = -l_errno;
1055                 goto out;
1056         } else
1057                 rc = LUSTRE_CFG_RC_NO_ERR;
1058
1059         snprintf(err_str, sizeof(err_str), "\"success\"");
1060 out:
1061         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
1062                 cYAML_free_tree(root);
1063         } else if (show_rc != NULL && *show_rc != NULL) {
1064                 struct cYAML *show_node;
1065                 /* find the route node, if one doesn't exist then
1066                  * insert one.  Otherwise add to the one there
1067                  */
1068                 show_node = cYAML_get_object_item(*show_rc, "route");
1069                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
1070                         cYAML_insert_child(show_node, first_seq);
1071                         free(route);
1072                         free(root);
1073                 } else if (show_node == NULL) {
1074                         cYAML_insert_sibling((*show_rc)->cy_child,
1075                                                 route);
1076                         free(root);
1077                 } else {
1078                         cYAML_free_tree(root);
1079                 }
1080         } else {
1081                 *show_rc = root;
1082         }
1083
1084         cYAML_build_error(rc, seq_no, SHOW_CMD, "route", err_str, err_rc);
1085
1086         return rc;
1087 }
1088
1089 static int socket_intf_query(int request, char *intf,
1090                              struct ifreq *ifr)
1091 {
1092         int rc = 0;
1093         int sockfd;
1094
1095         if (strlen(intf) >= IFNAMSIZ || ifr == NULL)
1096                 return LUSTRE_CFG_RC_BAD_PARAM;
1097
1098         sockfd = socket(AF_INET, SOCK_DGRAM, 0);
1099         if (sockfd < 0)
1100                 return LUSTRE_CFG_RC_BAD_PARAM;
1101
1102         strcpy(ifr->ifr_name, intf);
1103         rc = ioctl(sockfd, request, ifr);
1104         if (rc != 0)
1105                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1106
1107         close(sockfd);
1108
1109         return rc;
1110 }
1111
1112 static int lustre_lnet_queryip(struct lnet_dlc_intf_descr *intf, __u32 *ip)
1113 {
1114         struct ifreq ifr;
1115         int rc;
1116
1117         memset(&ifr, 0, sizeof(ifr));
1118         rc = socket_intf_query(SIOCGIFFLAGS, intf->intf_name, &ifr);
1119         if (rc != 0)
1120                 return LUSTRE_CFG_RC_BAD_PARAM;
1121
1122         if ((ifr.ifr_flags & IFF_UP) == 0)
1123                 return LUSTRE_CFG_RC_BAD_PARAM;
1124
1125         memset(&ifr, 0, sizeof(ifr));
1126         rc = socket_intf_query(SIOCGIFADDR, intf->intf_name, &ifr);
1127         if (rc != 0)
1128                 return LUSTRE_CFG_RC_BAD_PARAM;
1129
1130         *ip = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
1131         *ip = bswap_32(*ip);
1132
1133         return LUSTRE_CFG_RC_NO_ERR;
1134 }
1135
1136 /*
1137  * for each interface in the array of interfaces find the IP address of
1138  * that interface, create its nid and add it to an array of NIDs.
1139  * Stop if any of the interfaces is down
1140  */
1141 static int lustre_lnet_intf2nids(struct lnet_dlc_network_descr *nw,
1142                                  lnet_nid_t **nids, __u32 *nnids,
1143                                  char *err_str, size_t str_len)
1144 {
1145         int i = 0, count = 0, rc;
1146         struct lnet_dlc_intf_descr *intf;
1147         char val[LNET_MAX_STR_LEN];
1148         __u32 ip;
1149         int gni_num;
1150         char *endp;
1151         unsigned int num;
1152
1153
1154         if (nw == NULL || nids == NULL) {
1155                 snprintf(err_str, str_len,
1156                          "\"unexpected parameters to lustre_lnet_intf2nids()\"");
1157                 return LUSTRE_CFG_RC_BAD_PARAM;
1158         }
1159
1160         if (LNET_NETTYP(nw->nw_id) == GNILND) {
1161                 count = 1;
1162         } else {
1163                 list_for_each_entry(intf, &nw->nw_intflist, intf_on_network)
1164                         count++;
1165         }
1166
1167         *nids = calloc(count, sizeof(lnet_nid_t));
1168         if (*nids == NULL) {
1169                 snprintf(err_str, str_len,
1170                          "\"out of memory\"");
1171                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1172         }
1173         /*
1174          * special case the GNI interface since it doesn't have an IP
1175          * address. The assumption is that there can only be one GNI
1176          * interface in the system. No interface name is provided.
1177          */
1178         if (LNET_NETTYP(nw->nw_id) == GNILND) {
1179                 rc = read_sysfs_file(gni_nid_path, "nid", val,
1180                                 1, sizeof(val));
1181                 if (rc) {
1182                         snprintf(err_str, str_len,
1183                                  "\"cannot read gni nid\"");
1184                         goto failed;
1185                 }
1186                 gni_num = atoi(val);
1187
1188                 (*nids)[i] = LNET_MKNID(nw->nw_id, gni_num);
1189
1190                 goto out;
1191         }
1192
1193         /* look at the other interfaces */
1194         list_for_each_entry(intf, &nw->nw_intflist, intf_on_network) {
1195                 if (LNET_NETTYP(nw->nw_id) == PTL4LND) {
1196                         /* handle LNDs with numeric interface name */
1197                         num = strtoul(intf->intf_name, &endp, 0);
1198                         if (endp == intf->intf_name || *endp != '\0') {
1199                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1200                                 snprintf(err_str, str_len,
1201                                          "\"couldn't query intf %s\"",
1202                                          intf->intf_name);
1203                                 goto failed;
1204                         }
1205                         (*nids)[i] = LNET_MKNID(nw->nw_id, num);
1206                         i++;
1207                 } else {
1208                         /* handle LNDs with ip interface name */
1209                         rc = lustre_lnet_queryip(intf, &ip);
1210                         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1211                                 snprintf(err_str, str_len,
1212                                          "\"couldn't query intf %s\"",
1213                                          intf->intf_name);
1214                                 goto failed;
1215                         }
1216                         (*nids)[i] = LNET_MKNID(nw->nw_id, ip);
1217                         i++;
1218                 }
1219         }
1220
1221 out:
1222         *nnids = count;
1223
1224         return 0;
1225
1226 failed:
1227         free(*nids);
1228         *nids = NULL;
1229         return rc;
1230 }
1231
1232 /*
1233  * called repeatedly until a match or no more ip range
1234  * What do you have?
1235  *      ip_range expression
1236  *      interface list with all the interface names.
1237  *      all the interfaces in the system.
1238  *
1239  *      try to match the ip_range expr to one of the interfaces' IPs in
1240  *      the system. If we hit a patch for an interface. Check if that
1241  *      interface name is in the list.
1242  *
1243  *      If there are more than one interface in the list, then make sure
1244  *      that the IPs for all of these interfaces match the ip ranges
1245  *      given.
1246  *
1247  *      for each interface in intf_list
1248  *              look up the intf name in ifa
1249  *              if not there then no match
1250  *              check ip obtained from ifa against a match to any of the
1251  *              ip_ranges given.
1252  *              If no match, then fail
1253  *
1254  *      The result is that all the interfaces have to match.
1255  */
1256 int lustre_lnet_match_ip_to_intf(struct ifaddrs *ifa,
1257                                  struct list_head *intf_list,
1258                                  struct list_head *ip_ranges)
1259 {
1260         int rc;
1261         __u32 ip;
1262         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1263         struct ifaddrs *ifaddr = ifa;
1264         struct lustre_lnet_ip_range_descr *ip_range;
1265         int family;
1266
1267         /*
1268          * if there are no explicit interfaces, and no ip ranges, then
1269          * configure the first tcp interface we encounter.
1270          */
1271         if (list_empty(intf_list) && list_empty(ip_ranges)) {
1272                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1273                         if (ifaddr->ifa_addr == NULL)
1274                                 continue;
1275
1276                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1277                                 continue;
1278
1279                         family = ifaddr->ifa_addr->sa_family;
1280                         if (family == AF_INET &&
1281                             strcmp(ifaddr->ifa_name, "lo") != 0) {
1282                                 rc = lustre_lnet_add_intf_descr
1283                                         (intf_list, ifaddr->ifa_name,
1284                                         strlen(ifaddr->ifa_name));
1285
1286                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
1287                                         return rc;
1288
1289                                 return LUSTRE_CFG_RC_MATCH;
1290                         }
1291                 }
1292                 return LUSTRE_CFG_RC_NO_MATCH;
1293         }
1294
1295         /*
1296          * First interface which matches an IP pattern will be used
1297          */
1298         if (list_empty(intf_list)) {
1299                 /*
1300                  * no interfaces provided in the rule, but an ip range is
1301                  * provided, so try and match an interface to the ip
1302                  * range.
1303                  */
1304                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1305                         if (ifaddr->ifa_addr == NULL)
1306                                 continue;
1307
1308                         if ((ifaddr->ifa_flags & IFF_UP) == 0)
1309                                 continue;
1310
1311                         family = ifaddr->ifa_addr->sa_family;
1312                         if (family == AF_INET) {
1313                                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->
1314                                         sin_addr.s_addr;
1315
1316                                 list_for_each_entry(ip_range, ip_ranges,
1317                                                     ipr_entry) {
1318                                         rc = cfs_ip_addr_match(bswap_32(ip),
1319                                                         &ip_range->ipr_expr);
1320                                         if (!rc)
1321                                                 continue;
1322
1323                                         rc = lustre_lnet_add_intf_descr
1324                                           (intf_list, ifaddr->ifa_name,
1325                                            strlen(ifaddr->ifa_name));
1326
1327                                         if (rc != LUSTRE_CFG_RC_NO_ERR)
1328                                                 return rc;
1329                                 }
1330                         }
1331                 }
1332
1333                 if (!list_empty(intf_list))
1334                         return LUSTRE_CFG_RC_MATCH;
1335
1336                 return LUSTRE_CFG_RC_NO_MATCH;
1337         }
1338
1339         /*
1340          * If an interface is explicitly specified the ip-range might or
1341          * might not be specified. if specified the interface needs to match the
1342          * ip-range. If no ip-range then the interfaces are
1343          * automatically matched if they are all up.
1344          * If > 1 interfaces all the interfaces must match for the NI to
1345          * be configured.
1346          */
1347         list_for_each_entry_safe(intf_descr, tmp, intf_list, intf_on_network) {
1348                 for (ifaddr = ifa; ifaddr != NULL; ifaddr = ifaddr->ifa_next) {
1349                         if (ifaddr->ifa_addr == NULL)
1350                                 continue;
1351
1352                         family = ifaddr->ifa_addr->sa_family;
1353                         if (family == AF_INET &&
1354                             strcmp(intf_descr->intf_name,
1355                                    ifaddr->ifa_name) == 0)
1356                                 break;
1357                 }
1358
1359                 if (ifaddr == NULL) {
1360                         list_del(&intf_descr->intf_on_network);
1361                         free_intf_descr(intf_descr);
1362                         continue;
1363                 }
1364
1365                 if ((ifaddr->ifa_flags & IFF_UP) == 0) {
1366                         list_del(&intf_descr->intf_on_network);
1367                         free_intf_descr(intf_descr);
1368                         continue;
1369                 }
1370
1371                 ip = ((struct sockaddr_in *)ifaddr->ifa_addr)->sin_addr.s_addr;
1372
1373                 rc = 1;
1374                 list_for_each_entry(ip_range, ip_ranges, ipr_entry) {
1375                         rc = cfs_ip_addr_match(bswap_32(ip), &ip_range->ipr_expr);
1376                         if (rc)
1377                                 break;
1378                 }
1379
1380                 if (!rc) {
1381                         /* no match for this interface */
1382                         list_del(&intf_descr->intf_on_network);
1383                         free_intf_descr(intf_descr);
1384                 }
1385         }
1386
1387         return LUSTRE_CFG_RC_MATCH;
1388 }
1389
1390 static int lustre_lnet_resolve_ip2nets_rule(struct lustre_lnet_ip2nets *ip2nets,
1391                                             lnet_nid_t **nids, __u32 *nnids,
1392                                             char *err_str, size_t str_len)
1393 {
1394         struct ifaddrs *ifa;
1395         int rc = LUSTRE_CFG_RC_NO_ERR;
1396
1397         rc = getifaddrs(&ifa);
1398         if (rc < 0) {
1399                 snprintf(err_str, str_len,
1400                          "\"failed to get interface addresses: %d\"", -errno);
1401                 return -errno;
1402         }
1403
1404         rc = lustre_lnet_match_ip_to_intf(ifa,
1405                                           &ip2nets->ip2nets_net.nw_intflist,
1406                                           &ip2nets->ip2nets_ip_ranges);
1407         if (rc != LUSTRE_CFG_RC_MATCH) {
1408                 snprintf(err_str, str_len,
1409                          "\"couldn't match ip to existing interfaces\"");
1410                 freeifaddrs(ifa);
1411                 return rc;
1412         }
1413
1414         rc = lustre_lnet_intf2nids(&ip2nets->ip2nets_net, nids, nnids,
1415                                    err_str, str_len);
1416         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1417                 *nids = NULL;
1418                 *nnids = 0;
1419         }
1420
1421         freeifaddrs(ifa);
1422
1423         return rc;
1424 }
1425
1426 static int
1427 lustre_lnet_ioctl_config_ni(struct list_head *intf_list,
1428                             struct lnet_ioctl_config_lnd_tunables *tunables,
1429                             struct cfs_expr_list *global_cpts,
1430                             lnet_nid_t *nids, char *err_str)
1431 {
1432         char *data;
1433         struct lnet_ioctl_config_ni *conf;
1434         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1435         int rc = LUSTRE_CFG_RC_NO_ERR, i = 0;
1436         size_t len;
1437         int count;
1438         struct lnet_dlc_intf_descr *intf_descr;
1439         __u32 *cpt_array;
1440         struct cfs_expr_list *cpt_expr;
1441
1442         list_for_each_entry(intf_descr, intf_list,
1443                             intf_on_network) {
1444                 if (tunables != NULL)
1445                         len = sizeof(struct lnet_ioctl_config_ni) +
1446                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1447                 else
1448                         len = sizeof(struct lnet_ioctl_config_ni);
1449
1450                 data = calloc(1, len);
1451                 if (!data)
1452                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1453                 conf = (struct lnet_ioctl_config_ni*) data;
1454                 if (tunables != NULL)
1455                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1456                                 conf->lic_bulk;
1457
1458                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1459                 conf->lic_cfg_hdr.ioc_len = len;
1460                 conf->lic_nid = nids[i];
1461                 strncpy(conf->lic_ni_intf, intf_descr->intf_name,
1462                         LNET_MAX_STR_LEN);
1463
1464                 if (intf_descr->cpt_expr != NULL)
1465                         cpt_expr = intf_descr->cpt_expr;
1466                 else if (global_cpts != NULL)
1467                         cpt_expr = global_cpts;
1468                 else
1469                         cpt_expr = NULL;
1470
1471                 if (cpt_expr != NULL) {
1472                         count = cfs_expr_list_values(cpt_expr,
1473                                                      LNET_MAX_SHOW_NUM_CPT,
1474                                                      &cpt_array);
1475                         if (count > 0) {
1476                                 memcpy(conf->lic_cpts, cpt_array,
1477                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1478                                 free(cpt_array);
1479                         } else {
1480                                 count = 0;
1481                         }
1482                 } else {
1483                         count = 0;
1484                 }
1485
1486                 conf->lic_ncpts = count;
1487
1488                 if (tunables != NULL)
1489                         memcpy(tun, tunables, sizeof(*tunables));
1490
1491                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1492                 if (rc < 0) {
1493                         rc = -errno;
1494                         snprintf(err_str,
1495                                  LNET_MAX_STR_LEN,
1496                                  "\"cannot add network: %s\"", strerror(errno));
1497                         free(data);
1498                         return rc;
1499                 }
1500                 free(data);
1501                 i++;
1502         }
1503
1504         return LUSTRE_CFG_RC_NO_ERR;
1505 }
1506
1507 int
1508 lustre_lnet_config_ip2nets(struct lustre_lnet_ip2nets *ip2nets,
1509                            struct lnet_ioctl_config_lnd_tunables *tunables,
1510                            struct cfs_expr_list *global_cpts,
1511                            int seq_no, struct cYAML **err_rc)
1512 {
1513         lnet_nid_t *nids = NULL;
1514         __u32 nnids = 0;
1515         int rc;
1516         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1517
1518         if (!ip2nets) {
1519                 snprintf(err_str,
1520                          sizeof(err_str),
1521                          "\"incomplete ip2nets information\"");
1522                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1523                 goto out;
1524         }
1525
1526         /*
1527          * call below function to resolve the rules into a list of nids.
1528          * The memory is allocated in that function then freed here when
1529          * it's no longer needed.
1530          */
1531         rc = lustre_lnet_resolve_ip2nets_rule(ip2nets, &nids, &nnids, err_str,
1532                                               sizeof(err_str));
1533         if (rc != LUSTRE_CFG_RC_NO_ERR && rc != LUSTRE_CFG_RC_MATCH)
1534                 goto out;
1535
1536         if (list_empty(&ip2nets->ip2nets_net.nw_intflist)) {
1537                 snprintf(err_str, sizeof(err_str),
1538                          "\"no interfaces match ip2nets rules\"");
1539                 goto free_nids_out;
1540         }
1541
1542         rc = lustre_lnet_ioctl_config_ni(&ip2nets->ip2nets_net.nw_intflist,
1543                                          tunables, global_cpts, nids,
1544                                          err_str);
1545
1546 free_nids_out:
1547         free(nids);
1548
1549 out:
1550         cYAML_build_error(rc, seq_no, ADD_CMD, "ip2nets", err_str, err_rc);
1551         return rc;
1552 }
1553
1554 int lustre_lnet_config_ni(struct lnet_dlc_network_descr *nw_descr,
1555                           struct cfs_expr_list *global_cpts,
1556                           char *ip2net,
1557                           struct lnet_ioctl_config_lnd_tunables *tunables,
1558                           int seq_no, struct cYAML **err_rc)
1559 {
1560         char *data = NULL;
1561         struct lnet_ioctl_config_ni *conf;
1562         struct lnet_ioctl_config_lnd_tunables *tun = NULL;
1563         char buf[LNET_MAX_STR_LEN];
1564         int rc = LUSTRE_CFG_RC_NO_ERR;
1565         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1566         lnet_nid_t *nids = NULL;
1567         __u32 nnids = 0;
1568         size_t len;
1569         int count;
1570         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1571         __u32 *cpt_array;
1572
1573         if (ip2net == NULL && (nw_descr == NULL || nw_descr->nw_id == 0 ||
1574             (list_empty(&nw_descr->nw_intflist) &&
1575              LNET_NETTYP(nw_descr->nw_id) != GNILND))) {
1576                 snprintf(err_str,
1577                          sizeof(err_str),
1578                          "\"missing mandatory parameters in NI config: '%s'\"",
1579                          (nw_descr == NULL) ? "network , interface" :
1580                          (nw_descr->nw_id == 0) ? "network" : "interface");
1581                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1582                 goto out;
1583         }
1584
1585         if (ip2net != NULL && strlen(ip2net) >= sizeof(buf)) {
1586                 snprintf(err_str,
1587                          sizeof(err_str),
1588                          "\"ip2net string too long %d\"",
1589                                 (int)strlen(ip2net));
1590                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
1591                 goto out;
1592         }
1593
1594         if (ip2net != NULL) {
1595                 if (tunables != NULL)
1596                         len = sizeof(struct lnet_ioctl_config_ni) +
1597                               sizeof(struct lnet_ioctl_config_lnd_tunables);
1598                 else
1599                         len = sizeof(struct lnet_ioctl_config_ni);
1600                 data = calloc(1, len);
1601                 if (!data) {
1602                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1603                         goto out;
1604                 }
1605                 conf = (struct lnet_ioctl_config_ni*) data;
1606                 if (tunables != NULL)
1607                         tun = (struct lnet_ioctl_config_lnd_tunables*)
1608                                 (data + sizeof(*conf));
1609
1610                 LIBCFS_IOC_INIT_V2(*conf, lic_cfg_hdr);
1611                 conf->lic_cfg_hdr.ioc_len = len;
1612                 strncpy(conf->lic_legacy_ip2nets, ip2net,
1613                         LNET_MAX_STR_LEN);
1614
1615                 if (global_cpts != NULL) {
1616                         count = cfs_expr_list_values(global_cpts,
1617                                                      LNET_MAX_SHOW_NUM_CPT,
1618                                                      &cpt_array);
1619                         if (count > 0) {
1620                                 memcpy(conf->lic_cpts, cpt_array,
1621                                        sizeof(cpt_array[0]) * LNET_MAX_STR_LEN);
1622                                 free(cpt_array);
1623                         } else {
1624                                 count = 0;
1625                         }
1626                 } else {
1627                         count = 0;
1628                 }
1629
1630                 conf->lic_ncpts = count;
1631
1632                 if (tunables != NULL)
1633                         memcpy(tun, tunables, sizeof(*tunables));
1634
1635                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_LOCAL_NI, data);
1636                 if (rc < 0) {
1637                         rc = -errno;
1638                         snprintf(err_str,
1639                                 sizeof(err_str),
1640                                 "\"cannot add network: %s\"", strerror(errno));
1641                         goto out;
1642                 }
1643
1644                 goto out;
1645         }
1646
1647         if (LNET_NETTYP(nw_descr->nw_id) == LOLND) {
1648                 rc = LUSTRE_CFG_RC_NO_ERR;
1649                 goto out;
1650         }
1651
1652         if (nw_descr->nw_id == LNET_NET_ANY) {
1653                 snprintf(err_str,
1654                         sizeof(err_str),
1655                         "\"cannot parse net '%s'\"",
1656                         libcfs_net2str(nw_descr->nw_id));
1657                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1658                 goto out;
1659         }
1660
1661         /*
1662          * special case the GNI since no interface name is expected
1663          */
1664         if (list_empty(&nw_descr->nw_intflist) &&
1665             (LNET_NETTYP(nw_descr->nw_id) != GNILND)) {
1666                 snprintf(err_str,
1667                         sizeof(err_str),
1668                         "\"no interface name provided\"");
1669                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1670                 goto out;
1671         }
1672
1673         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1674                                    err_str, sizeof(err_str));
1675         if (rc != 0) {
1676                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1677                 goto out;
1678         }
1679
1680         rc = lustre_lnet_ioctl_config_ni(&nw_descr->nw_intflist,
1681                                          tunables, global_cpts, nids,
1682                                          err_str);
1683
1684 out:
1685         if (nw_descr != NULL) {
1686                 list_for_each_entry_safe(intf_descr, tmp,
1687                                          &nw_descr->nw_intflist,
1688                                          intf_on_network) {
1689                         list_del(&intf_descr->intf_on_network);
1690                         free_intf_descr(intf_descr);
1691                 }
1692         }
1693
1694         cYAML_build_error(rc, seq_no, ADD_CMD, "net", err_str, err_rc);
1695
1696         if (nids)
1697                 free(nids);
1698
1699         if (data)
1700                 free(data);
1701
1702         return rc;
1703 }
1704
1705 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw_descr,
1706                        int seq_no, struct cYAML **err_rc)
1707 {
1708         struct lnet_ioctl_config_ni data;
1709         int rc = LUSTRE_CFG_RC_NO_ERR, i;
1710         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1711         lnet_nid_t *nids = NULL;
1712         __u32 nnids = 0;
1713         struct lnet_dlc_intf_descr *intf_descr, *tmp;
1714
1715         if (nw_descr == NULL || nw_descr->nw_id == 0) {
1716                 snprintf(err_str,
1717                          sizeof(err_str),
1718                          "\"missing mandatory parameter in deleting NI: '%s'\"",
1719                          (nw_descr == NULL) ? "network , interface" :
1720                          (nw_descr->nw_id == 0) ? "network" : "interface");
1721                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
1722                 goto out;
1723         }
1724
1725         if (LNET_NETTYP(nw_descr->nw_id) == LOLND)
1726                 return LUSTRE_CFG_RC_NO_ERR;
1727
1728         if (nw_descr->nw_id == LNET_NET_ANY) {
1729                 snprintf(err_str,
1730                          sizeof(err_str),
1731                          "\"cannot parse net '%s'\"",
1732                          libcfs_net2str(nw_descr->nw_id));
1733                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1734                 goto out;
1735         }
1736
1737         rc = lustre_lnet_intf2nids(nw_descr, &nids, &nnids,
1738                                    err_str, sizeof(err_str));
1739         if (rc != 0) {
1740                 rc = LUSTRE_CFG_RC_BAD_PARAM;
1741                 goto out;
1742         }
1743
1744         /*
1745          * no interfaces just the nw_id is specified
1746          */
1747         if (nnids == 0) {
1748                 nids = calloc(1, sizeof(*nids));
1749                 if (nids == NULL) {
1750                         snprintf(err_str, sizeof(err_str),
1751                                 "\"out of memory\"");
1752                         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1753                         goto out;
1754                 }
1755                 nids[0] = LNET_MKNID(nw_descr->nw_id, 0);
1756                 nnids = 1;
1757         }
1758
1759         for (i = 0; i < nnids; i++) {
1760                 LIBCFS_IOC_INIT_V2(data, lic_cfg_hdr);
1761                 data.lic_nid = nids[i];
1762
1763                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_LOCAL_NI, &data);
1764                 if (rc < 0) {
1765                         rc = -errno;
1766                         snprintf(err_str,
1767                                 sizeof(err_str),
1768                                 "\"cannot del network: %s\"", strerror(errno));
1769                 }
1770         }
1771
1772         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
1773                                  intf_on_network) {
1774                 list_del(&intf_descr->intf_on_network);
1775                 free_intf_descr(intf_descr);
1776         }
1777
1778 out:
1779         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
1780
1781         if (nids != NULL)
1782                 free(nids);
1783
1784         return rc;
1785 }
1786
1787 static int
1788 lustre_lnet_config_healthv(int value, bool all, lnet_nid_t nid,
1789                            enum lnet_health_type type, char *name,
1790                            int seq_no, struct cYAML **err_rc)
1791 {
1792         struct lnet_ioctl_reset_health_cfg data;
1793         int rc = LUSTRE_CFG_RC_NO_ERR;
1794         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
1795
1796         LIBCFS_IOC_INIT_V2(data, rh_hdr);
1797         data.rh_type = type;
1798         data.rh_all = all;
1799         data.rh_value = value;
1800         data.rh_nid = nid;
1801
1802         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_SET_HEALHV, &data);
1803         if (rc != 0) {
1804                 rc = -errno;
1805                 snprintf(err_str,
1806                          sizeof(err_str), "Can not configure health value: %s",
1807                          strerror(errno));
1808         }
1809
1810         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
1811
1812         return rc;
1813 }
1814
1815 int lustre_lnet_config_ni_healthv(int value, bool all, char *ni_nid, int seq_no,
1816                                   struct cYAML **err_rc)
1817 {
1818         lnet_nid_t nid;
1819         if (ni_nid)
1820                 nid = libcfs_str2nid(ni_nid);
1821         else
1822                 nid = LNET_NID_ANY;
1823         return lustre_lnet_config_healthv(value, all, nid,
1824                                           LNET_HEALTH_TYPE_LOCAL_NI,
1825                                           "ni healthv", seq_no, err_rc);
1826 }
1827
1828 int lustre_lnet_config_peer_ni_healthv(int value, bool all, char *lpni_nid,
1829                                        int seq_no, struct cYAML **err_rc)
1830 {
1831         lnet_nid_t nid;
1832         if (lpni_nid)
1833                 nid = libcfs_str2nid(lpni_nid);
1834         else
1835                 nid = LNET_NID_ANY;
1836         return lustre_lnet_config_healthv(value, all, nid,
1837                                           LNET_HEALTH_TYPE_PEER_NI,
1838                                           "peer_ni healthv", seq_no, err_rc);
1839 }
1840
1841 static bool
1842 add_msg_stats_to_yaml_blk(struct cYAML *yaml,
1843                           struct lnet_ioctl_comm_count *counts)
1844 {
1845         if (cYAML_create_number(yaml, "put",
1846                                 counts->ico_put_count)
1847                                         == NULL)
1848                 return false;
1849         if (cYAML_create_number(yaml, "get",
1850                                 counts->ico_get_count)
1851                                         == NULL)
1852                 return false;
1853         if (cYAML_create_number(yaml, "reply",
1854                                 counts->ico_reply_count)
1855                                         == NULL)
1856                 return false;
1857         if (cYAML_create_number(yaml, "ack",
1858                                 counts->ico_ack_count)
1859                                         == NULL)
1860                 return false;
1861         if (cYAML_create_number(yaml, "hello",
1862                                 counts->ico_hello_count)
1863                                         == NULL)
1864                 return false;
1865
1866         return true;
1867 }
1868
1869 static struct lnet_ioctl_comm_count *
1870 get_counts(struct lnet_ioctl_element_msg_stats *msg_stats, int idx)
1871 {
1872         if (idx == 0)
1873                 return &msg_stats->im_send_stats;
1874         if (idx == 1)
1875                 return &msg_stats->im_recv_stats;
1876         if (idx == 2)
1877                 return &msg_stats->im_drop_stats;
1878
1879         return NULL;
1880 }
1881
1882 static int
1883 create_local_udsp_info(struct lnet_ioctl_construct_udsp_info *udsp_info,
1884                        struct cYAML *net_node)
1885 {
1886         char tmp[LNET_MAX_STR_LEN];
1887         struct cYAML *udsp_net;
1888         bool created = false;
1889         struct cYAML *pref;
1890         int i;
1891
1892         /* add the UDSP info */
1893         udsp_net = cYAML_create_object(net_node, "udsp info");
1894         if (!udsp_net)
1895                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1896
1897         if (!cYAML_create_number(udsp_net, "net priority",
1898                                  (int) udsp_info->cud_net_priority))
1899                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1900
1901         if (!cYAML_create_number(udsp_net, "nid priority",
1902                                  (int)udsp_info->cud_nid_priority))
1903                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1904
1905         pref = udsp_net;
1906
1907         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1908                 memset(tmp, 0, LNET_MAX_STR_LEN);
1909                 if (udsp_info->cud_pref_rtr_nid[i] == 0)
1910                         break;
1911                 if (!created) {
1912                         pref = cYAML_create_object(udsp_net,
1913                                         "Preferred gateway NIDs");
1914                         if (!pref)
1915                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1916                         created = true;
1917                 }
1918                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1919                 if (!cYAML_create_string(pref, tmp,
1920                         libcfs_nid2str(udsp_info->cud_pref_rtr_nid[i])))
1921                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1922         }
1923
1924         return LUSTRE_CFG_RC_NO_ERR;
1925 }
1926
1927 static int
1928 create_remote_udsp_info(struct lnet_ioctl_construct_udsp_info *udsp_info,
1929                         struct cYAML *nid_node)
1930 {
1931         char tmp[LNET_MAX_STR_LEN];
1932         struct cYAML *udsp_nid;
1933         bool created = false;
1934         struct cYAML *pref;
1935         int i;
1936
1937         /* add the UDSP info */
1938         udsp_nid = cYAML_create_object(nid_node, "udsp info");
1939         if (!udsp_nid)
1940                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1941
1942         if (!cYAML_create_number(udsp_nid, "net priority",
1943                                  (int) udsp_info->cud_net_priority))
1944                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1945
1946         if (!cYAML_create_number(udsp_nid, "nid priority",
1947                                  (int) udsp_info->cud_nid_priority))
1948                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1949
1950         pref = udsp_nid;
1951         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1952                 memset(tmp, 0, LNET_MAX_STR_LEN);
1953                 if (udsp_info->cud_pref_rtr_nid[i] == 0)
1954                         break;
1955                 if (!created) {
1956                         pref = cYAML_create_object(udsp_nid,
1957                                         "Preferred gateway NIDs");
1958                         if (!pref)
1959                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1960                         created = true;
1961                 }
1962                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1963                 if (!cYAML_create_string(pref, tmp,
1964                         libcfs_nid2str(udsp_info->cud_pref_rtr_nid[i])))
1965                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1966         }
1967
1968         pref = udsp_nid;
1969         created = false;
1970         for (i = 0; i < LNET_MAX_SHOW_NUM_NID; i++) {
1971                 memset(tmp, 0, LNET_MAX_STR_LEN);
1972                 if (udsp_info->cud_pref_nid[i] == 0)
1973                         break;
1974                 if (!created) {
1975                         pref = cYAML_create_object(udsp_nid,
1976                                         "Preferred source NIDs");
1977                         if (!pref)
1978                                 return LUSTRE_CFG_RC_OUT_OF_MEM;
1979                         created = true;
1980                 }
1981                 snprintf(tmp, sizeof(tmp), "NID-%d", i);
1982                 if (!cYAML_create_string(pref, tmp,
1983                         libcfs_nid2str(udsp_info->cud_pref_nid[i])))
1984                         return LUSTRE_CFG_RC_OUT_OF_MEM;
1985         }
1986
1987         return LUSTRE_CFG_RC_NO_ERR;
1988 }
1989
1990 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
1991                          struct cYAML **show_rc, struct cYAML **err_rc,
1992                          bool backup)
1993 {
1994         char *buf;
1995         struct lnet_ioctl_config_ni *ni_data;
1996         struct lnet_ioctl_config_lnd_tunables *lnd;
1997         struct lnet_ioctl_element_stats *stats;
1998         struct lnet_ioctl_element_msg_stats msg_stats;
1999         struct lnet_ioctl_local_ni_hstats hstats;
2000         struct lnet_ioctl_construct_udsp_info udsp_info;
2001         __u32 net = LNET_NET_ANY;
2002         __u32 prev_net = LNET_NET_ANY;
2003         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
2004         int l_errno = 0;
2005         struct cYAML *root = NULL, *tunables = NULL,
2006                 *net_node = NULL, *interfaces = NULL,
2007                 *item = NULL, *first_seq = NULL,
2008                 *tmp = NULL, *statistics = NULL,
2009                 *yhstats = NULL;
2010         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
2011         char str_buf[str_buf_len];
2012         char *pos;
2013         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2014         bool exist = false, new_net = true;
2015         int net_num = 0;
2016         size_t buf_size = sizeof(*ni_data) + sizeof(*lnd) + sizeof(*stats);
2017
2018         buf = calloc(1, buf_size);
2019         if (buf == NULL)
2020                 goto out;
2021
2022         ni_data = (struct lnet_ioctl_config_ni *)buf;
2023
2024         if (nw != NULL) {
2025                 net = libcfs_str2net(nw);
2026                 if (net == LNET_NET_ANY) {
2027                         snprintf(err_str,
2028                                  sizeof(err_str),
2029                                  "\"cannot parse net '%s'\"", nw);
2030                         rc = LUSTRE_CFG_RC_BAD_PARAM;
2031                         goto out;
2032                 }
2033         }
2034
2035         root = cYAML_create_object(NULL, NULL);
2036         if (root == NULL)
2037                 goto out;
2038
2039         net_node = cYAML_create_seq(root, "net");
2040         if (net_node == NULL)
2041                 goto out;
2042
2043         for (i = 0;; i++) {
2044                 __u32 rc_net;
2045
2046                 memset(buf, 0, buf_size);
2047
2048                 LIBCFS_IOC_INIT_V2(*ni_data, lic_cfg_hdr);
2049                 /*
2050                  * set the ioc_len to the proper value since INIT assumes
2051                  * size of data
2052                  */
2053                 ni_data->lic_cfg_hdr.ioc_len = buf_size;
2054                 ni_data->lic_idx = i;
2055
2056                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LOCAL_NI, ni_data);
2057                 if (rc != 0) {
2058                         l_errno = errno;
2059                         break;
2060                 }
2061
2062                 rc_net = LNET_NIDNET(ni_data->lic_nid);
2063
2064                 /* filter on provided data */
2065                 if (net != LNET_NET_ANY &&
2066                     net != rc_net)
2067                         continue;
2068
2069                 /* if we're backing up don't store lo */
2070                 if (backup && LNET_NETTYP(rc_net) == LOLND)
2071                         continue;
2072
2073                 /* default rc to -1 in case we hit the goto */
2074                 rc = -1;
2075                 exist = true;
2076
2077                 stats = (struct lnet_ioctl_element_stats *)ni_data->lic_bulk;
2078                 lnd = (struct lnet_ioctl_config_lnd_tunables *)
2079                         (ni_data->lic_bulk + sizeof(*stats));
2080
2081                 if (rc_net != prev_net) {
2082                         prev_net = rc_net;
2083                         new_net = true;
2084                         net_num++;
2085                 }
2086
2087                 if (new_net) {
2088                         if (!cYAML_create_string(net_node, "net type",
2089                                                  libcfs_net2str(rc_net)))
2090                                 goto out;
2091
2092                         tmp = cYAML_create_seq(net_node, "local NI(s)");
2093                         if (tmp == NULL)
2094                                 goto out;
2095                         new_net = false;
2096                 }
2097
2098                 /* create the tree to be printed. */
2099                 item = cYAML_create_seq_item(tmp);
2100                 if (item == NULL)
2101                         goto out;
2102
2103                 if (first_seq == NULL)
2104                         first_seq = item;
2105
2106                 if (!backup &&
2107                     cYAML_create_string(item, "nid",
2108                                         libcfs_nid2str(ni_data->lic_nid)) == NULL)
2109                         goto out;
2110
2111                 if (!backup &&
2112                     cYAML_create_string(item,
2113                                         "status",
2114                                         (ni_data->lic_status ==
2115                                           LNET_NI_STATUS_UP) ?
2116                                             "up" : "down") == NULL)
2117                         goto out;
2118
2119                 /* don't add interfaces unless there is at least one
2120                  * interface */
2121                 if (strlen(ni_data->lic_ni_intf) > 0) {
2122                         interfaces = cYAML_create_object(item, "interfaces");
2123                         if (interfaces == NULL)
2124                                 goto out;
2125
2126                         snprintf(str_buf, sizeof(str_buf), "%d", 0);
2127                         if (cYAML_create_string(interfaces, str_buf,
2128                                                 ni_data->lic_ni_intf) == NULL)
2129                                 goto out;
2130                 }
2131
2132                 if (detail) {
2133                         char *limit;
2134                         int k;
2135
2136                         if (backup)
2137                                 goto continue_without_msg_stats;
2138
2139                         statistics = cYAML_create_object(item, "statistics");
2140                         if (statistics == NULL)
2141                                 goto out;
2142
2143                         if (cYAML_create_number(statistics, "send_count",
2144                                                 stats->iel_send_count)
2145                                                         == NULL)
2146                                 goto out;
2147
2148                         if (cYAML_create_number(statistics, "recv_count",
2149                                                 stats->iel_recv_count)
2150                                                         == NULL)
2151                                 goto out;
2152
2153                         if (cYAML_create_number(statistics, "drop_count",
2154                                                 stats->iel_drop_count)
2155                                                         == NULL)
2156                                 goto out;
2157
2158                         if (detail < 4)
2159                                 goto continue_without_udsp_info;
2160
2161                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
2162                         udsp_info.cud_nid = ni_data->lic_nid;
2163                         udsp_info.cud_peer = false;
2164                         rc = l_ioctl(LNET_DEV_ID,
2165                                      IOC_LIBCFS_GET_CONST_UDSP_INFO,
2166                                      &udsp_info);
2167                         if (rc != 0) {
2168                                 l_errno = errno;
2169                                 goto continue_without_udsp_info;
2170                         }
2171
2172                         rc = create_local_udsp_info(&udsp_info, item);
2173                         if (rc) {
2174                                 l_errno = errno;
2175                                 goto out;
2176                         }
2177
2178 continue_without_udsp_info:
2179                         if (detail < 2)
2180                                 goto continue_without_msg_stats;
2181
2182                         LIBCFS_IOC_INIT_V2(msg_stats, im_hdr);
2183                         msg_stats.im_hdr.ioc_len = sizeof(msg_stats);
2184                         msg_stats.im_idx = i;
2185
2186                         rc = l_ioctl(LNET_DEV_ID,
2187                                      IOC_LIBCFS_GET_LOCAL_NI_MSG_STATS,
2188                                      &msg_stats);
2189                         if (rc != 0) {
2190                                 l_errno = errno;
2191                                 goto continue_without_msg_stats;
2192                         }
2193
2194                         for (k = 0; k < 3; k++) {
2195                                 struct lnet_ioctl_comm_count *counts;
2196                                 struct cYAML *msg_statistics = NULL;
2197
2198                                 msg_statistics = cYAML_create_object(item,
2199                                                  (char *)gmsg_stat_names[k]);
2200                                 if (msg_statistics == NULL)
2201                                         goto out;
2202
2203                                 counts = get_counts(&msg_stats, k);
2204                                 if (counts == NULL)
2205                                         goto out;
2206
2207                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
2208                                                                counts))
2209                                         goto out;
2210                         }
2211
2212                         LIBCFS_IOC_INIT_V2(hstats, hlni_hdr);
2213                         hstats.hlni_nid = ni_data->lic_nid;
2214                         /* grab health stats */
2215                         rc = l_ioctl(LNET_DEV_ID,
2216                                      IOC_LIBCFS_GET_LOCAL_HSTATS,
2217                                      &hstats);
2218                         if (rc != 0) {
2219                                 l_errno = errno;
2220                                 goto continue_without_msg_stats;
2221                         }
2222                         yhstats = cYAML_create_object(item, "health stats");
2223                         if (!yhstats)
2224                                 goto out;
2225                         if (cYAML_create_number(yhstats, "health value",
2226                                                 hstats.hlni_health_value)
2227                                                         == NULL)
2228                                 goto out;
2229                         if (cYAML_create_number(yhstats, "interrupts",
2230                                                 hstats.hlni_local_interrupt)
2231                                                         == NULL)
2232                                 goto out;
2233                         if (cYAML_create_number(yhstats, "dropped",
2234                                                 hstats.hlni_local_dropped)
2235                                                         == NULL)
2236                                 goto out;
2237                         if (cYAML_create_number(yhstats, "aborted",
2238                                                 hstats.hlni_local_aborted)
2239                                                         == NULL)
2240                                 goto out;
2241                         if (cYAML_create_number(yhstats, "no route",
2242                                                 hstats.hlni_local_no_route)
2243                                                         == NULL)
2244                                 goto out;
2245                         if (cYAML_create_number(yhstats, "timeouts",
2246                                                 hstats.hlni_local_timeout)
2247                                                         == NULL)
2248                                 goto out;
2249                         if (cYAML_create_number(yhstats, "error",
2250                                                 hstats.hlni_local_error)
2251                                                         == NULL)
2252                                 goto out;
2253
2254 continue_without_msg_stats:
2255                         tunables = cYAML_create_object(item, "tunables");
2256                         if (!tunables)
2257                                 goto out;
2258
2259                         rc = lustre_net_show_tunables(tunables, &lnd->lt_cmn);
2260                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2261                                 goto out;
2262
2263                         rc = lustre_ni_show_tunables(tunables, LNET_NETTYP(rc_net),
2264                                                      &lnd->lt_tun);
2265                         if (rc != LUSTRE_CFG_RC_NO_ERR &&
2266                             rc != LUSTRE_CFG_RC_NO_MATCH)
2267                                 goto out;
2268
2269                         if (rc != LUSTRE_CFG_RC_NO_MATCH) {
2270                                 tunables = cYAML_create_object(item,
2271                                                                "lnd tunables");
2272                                 if (tunables == NULL)
2273                                         goto out;
2274                         }
2275
2276                         if (!backup &&
2277                             cYAML_create_number(item, "dev cpt",
2278                                                 ni_data->lic_dev_cpt) == NULL)
2279                                 goto out;
2280
2281                         /* out put the CPTs in the format: "[x,x,x,...]" */
2282                         pos = str_buf;
2283                         limit = str_buf + str_buf_len - 3;
2284                         pos += scnprintf(pos, limit - pos, "\"[");
2285                         for (j = 0 ; ni_data->lic_ncpts >= 1 &&
2286                                 j < ni_data->lic_ncpts &&
2287                                 pos < limit; j++) {
2288                                 pos += scnprintf(pos, limit - pos,
2289                                                  "%d", ni_data->lic_cpts[j]);
2290                                 if ((j + 1) < ni_data->lic_ncpts)
2291                                         pos += scnprintf(pos, limit - pos, ",");
2292                         }
2293                         snprintf(pos, 3, "]\"");
2294
2295                         if (ni_data->lic_ncpts >= 1 &&
2296                             cYAML_create_string(item, "CPT",
2297                                                 str_buf) == NULL)
2298                                 goto out;
2299                 }
2300         }
2301
2302         /* Print out the net information only if show_rc is not provided */
2303         if (show_rc == NULL)
2304                 cYAML_print_tree(root);
2305
2306         if (l_errno != ENOENT) {
2307                 snprintf(err_str,
2308                          sizeof(err_str),
2309                          "\"cannot get networks: %s\"",
2310                          strerror(l_errno));
2311                 rc = -l_errno;
2312                 goto out;
2313         } else
2314                 rc = LUSTRE_CFG_RC_NO_ERR;
2315
2316         snprintf(err_str, sizeof(err_str), "\"success\"");
2317 out:
2318         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2319                 cYAML_free_tree(root);
2320         } else if (show_rc != NULL && *show_rc != NULL) {
2321                 struct cYAML *show_node;
2322                 /* find the net node, if one doesn't exist
2323                  * then insert one.  Otherwise add to the one there
2324                  */
2325                 show_node = cYAML_get_object_item(*show_rc, "net");
2326                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2327                         cYAML_insert_child(show_node, first_seq);
2328                         free(net_node);
2329                         free(root);
2330                 } else if (show_node == NULL) {
2331                         cYAML_insert_sibling((*show_rc)->cy_child,
2332                                                 net_node);
2333                         free(root);
2334                 } else {
2335                         cYAML_free_tree(root);
2336                 }
2337         } else {
2338                 *show_rc = root;
2339         }
2340
2341         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
2342
2343         return rc;
2344 }
2345
2346 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
2347 {
2348         struct lnet_ioctl_config_data data;
2349         int rc = LUSTRE_CFG_RC_NO_ERR;
2350         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2351
2352         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2353         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
2354
2355         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
2356         if (rc != 0) {
2357                 rc = -errno;
2358                 snprintf(err_str,
2359                          sizeof(err_str),
2360                          "\"cannot %s routing %s\"",
2361                          (enable) ? "enable" : "disable", strerror(errno));
2362                 goto out;
2363         }
2364
2365 out:
2366         cYAML_build_error(rc, seq_no,
2367                          (enable) ? ADD_CMD : DEL_CMD,
2368                          "routing", err_str, err_rc);
2369
2370         return rc;
2371 }
2372
2373 int ioctl_set_value(__u32 val, int ioc, char *name,
2374                     int seq_no, struct cYAML **err_rc)
2375 {
2376         struct lnet_ioctl_set_value data;
2377         int rc = LUSTRE_CFG_RC_NO_ERR;
2378         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2379
2380         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2381         data.sv_value = val;
2382
2383         rc = l_ioctl(LNET_DEV_ID, ioc , &data);
2384         if (rc != 0) {
2385                 rc = -errno;
2386                 snprintf(err_str,
2387                          sizeof(err_str),
2388                          "\"cannot configure %s to %d: %s\"", name,
2389                          val, strerror(errno));
2390         }
2391
2392         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
2393
2394         return rc;
2395 }
2396
2397 int lustre_lnet_config_recov_intrv(int intrv, int seq_no, struct cYAML **err_rc)
2398 {
2399         int rc = LUSTRE_CFG_RC_NO_ERR;
2400         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2401         char val[LNET_MAX_STR_LEN];
2402
2403         snprintf(val, sizeof(val), "%d", intrv);
2404
2405         rc = write_sysfs_file(modparam_path, "lnet_recovery_interval", val,
2406                               1, strlen(val) + 1);
2407         if (rc)
2408                 snprintf(err_str, sizeof(err_str),
2409                          "\"cannot configure recovery interval: %s\"",
2410                          strerror(errno));
2411
2412         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_interval", err_str, err_rc);
2413
2414         return rc;
2415 }
2416
2417 int lustre_lnet_config_rtr_sensitivity(int sen, int seq_no, struct cYAML **err_rc)
2418 {
2419         int rc = LUSTRE_CFG_RC_NO_ERR;
2420         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2421         char val[LNET_MAX_STR_LEN];
2422
2423         snprintf(val, sizeof(val), "%d", sen);
2424
2425         rc = write_sysfs_file(modparam_path, "router_sensitivity_percentage", val,
2426                               1, strlen(val) + 1);
2427         if (rc)
2428                 snprintf(err_str, sizeof(err_str),
2429                          "\"cannot configure router health sensitivity: %s\"",
2430                          strerror(errno));
2431
2432         cYAML_build_error(rc, seq_no, ADD_CMD, "router_sensitivity", err_str, err_rc);
2433
2434         return rc;
2435 }
2436
2437 int lustre_lnet_config_hsensitivity(int sen, int seq_no, struct cYAML **err_rc)
2438 {
2439         int rc = LUSTRE_CFG_RC_NO_ERR;
2440         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2441         char val[LNET_MAX_STR_LEN];
2442
2443         snprintf(val, sizeof(val), "%d", sen);
2444
2445         rc = write_sysfs_file(modparam_path, "lnet_health_sensitivity", val,
2446                               1, strlen(val) + 1);
2447         if (rc)
2448                 snprintf(err_str, sizeof(err_str),
2449                          "\"cannot configure health sensitivity: %s\"",
2450                          strerror(errno));
2451
2452         cYAML_build_error(rc, seq_no, ADD_CMD, "health_sensitivity", err_str, err_rc);
2453
2454         return rc;
2455 }
2456
2457 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc)
2458 {
2459         int rc = LUSTRE_CFG_RC_NO_ERR;
2460         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2461         char val[LNET_MAX_STR_LEN];
2462
2463         snprintf(val, sizeof(val), "%d", timeout);
2464
2465         rc = write_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
2466                               1, strlen(val) + 1);
2467         if (rc)
2468                 snprintf(err_str, sizeof(err_str),
2469                          "\"cannot configure transaction timeout: %s\"",
2470                          strerror(errno));
2471
2472         cYAML_build_error(rc, seq_no, ADD_CMD, "transaction_timeout", err_str, err_rc);
2473
2474         return rc;
2475 }
2476
2477 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc)
2478 {
2479         int rc = LUSTRE_CFG_RC_NO_ERR;
2480         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2481         char val[LNET_MAX_STR_LEN];
2482
2483         snprintf(val, sizeof(val), "%d", count);
2484
2485         rc = write_sysfs_file(modparam_path, "lnet_retry_count", val,
2486                               1, strlen(val) + 1);
2487         if (rc)
2488                 snprintf(err_str, sizeof(err_str),
2489                          "\"cannot configure retry count: %s\"",
2490                          strerror(errno));
2491
2492         cYAML_build_error(rc, seq_no, ADD_CMD, "retry_count", err_str, err_rc);
2493
2494         return rc;
2495 }
2496
2497 int lustre_lnet_config_response_tracking(int val, int seq_no,
2498                                          struct cYAML **err_rc)
2499 {
2500         int rc = LUSTRE_CFG_RC_NO_ERR;
2501         char err_str[LNET_MAX_STR_LEN];
2502         char val_str[LNET_MAX_STR_LEN];
2503
2504         if (val < 0 || val > 3) {
2505                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2506                 snprintf(err_str, sizeof(err_str),
2507                          "\"Valid values are: 0, 1, 2, or 3\"");
2508         } else {
2509                 snprintf(err_str, sizeof(err_str), "\"success\"");
2510
2511                 snprintf(val_str, sizeof(val_str), "%d", val);
2512
2513                 rc = write_sysfs_file(modparam_path, "lnet_response_tracking",
2514                                       val_str, 1, strlen(val_str) + 1);
2515                 if (rc)
2516                         snprintf(err_str, sizeof(err_str),
2517                                  "\"cannot configure response tracking: %s\"",
2518                                  strerror(errno));
2519         }
2520
2521         cYAML_build_error(rc, seq_no, ADD_CMD, "response_tracking", err_str,
2522                           err_rc);
2523
2524         return rc;
2525 }
2526
2527 int lustre_lnet_config_recovery_limit(int val, int seq_no,
2528                                       struct cYAML **err_rc)
2529 {
2530         int rc = LUSTRE_CFG_RC_NO_ERR;
2531         char err_str[LNET_MAX_STR_LEN];
2532         char val_str[LNET_MAX_STR_LEN];
2533
2534         if (val < 0) {
2535                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2536                 snprintf(err_str, sizeof(err_str),
2537                          "\"Must be greater than or equal to 0\"");
2538         } else {
2539                 snprintf(err_str, sizeof(err_str), "\"success\"");
2540
2541                 snprintf(val_str, sizeof(val_str), "%d", val);
2542
2543                 rc = write_sysfs_file(modparam_path, "lnet_recovery_limit",
2544                                       val_str, 1, strlen(val_str) + 1);
2545                 if (rc)
2546                         snprintf(err_str, sizeof(err_str),
2547                                  "\"cannot configure recovery limit: %s\"",
2548                                  strerror(errno));
2549         }
2550
2551         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_limit", err_str,
2552                           err_rc);
2553
2554         return rc;
2555 }
2556
2557 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc)
2558 {
2559         int rc = LUSTRE_CFG_RC_NO_ERR;
2560         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2561         char val[LNET_MAX_STR_LEN];
2562
2563         snprintf(val, sizeof(val), "%d", max);
2564
2565         rc = write_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2566                               1, strlen(val) + 1);
2567         if (rc)
2568                 snprintf(err_str, sizeof(err_str),
2569                          "\"cannot configure max interfaces: %s\"",
2570                          strerror(errno));
2571
2572         cYAML_build_error(rc, seq_no, ADD_CMD, "max_interfaces", err_str, err_rc);
2573
2574         return rc;
2575 }
2576
2577 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc)
2578 {
2579         int rc = LUSTRE_CFG_RC_NO_ERR;
2580         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2581         char val[LNET_MAX_STR_LEN];
2582
2583         snprintf(val, sizeof(val), "%u", (enable) ? 0 : 1);
2584
2585         rc = write_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2586                               1, strlen(val) + 1);
2587         if (rc)
2588                 snprintf(err_str, sizeof(err_str),
2589                          "\"cannot configure discovery: %s\"",
2590                          strerror(errno));
2591
2592         cYAML_build_error(rc, seq_no, ADD_CMD, "discovery", err_str, err_rc);
2593
2594         return rc;
2595
2596 }
2597
2598 int lustre_lnet_config_drop_asym_route(int drop, int seq_no,
2599                                        struct cYAML **err_rc)
2600 {
2601         int rc = LUSTRE_CFG_RC_NO_ERR;
2602         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2603         char val[LNET_MAX_STR_LEN];
2604
2605         snprintf(val, sizeof(val), "%u", (drop) ? 1 : 0);
2606
2607         rc = write_sysfs_file(modparam_path, "lnet_drop_asym_route", val,
2608                               1, strlen(val) + 1);
2609         if (rc)
2610                 snprintf(err_str, sizeof(err_str),
2611                          "\"cannot configure drop asym route: %s\"",
2612                          strerror(errno));
2613
2614         cYAML_build_error(rc, seq_no, ADD_CMD, "drop_asym_route",
2615                           err_str, err_rc);
2616
2617         return rc;
2618
2619 }
2620
2621 int lustre_lnet_config_numa_range(int range, int seq_no, struct cYAML **err_rc)
2622 {
2623         return ioctl_set_value(range, IOC_LIBCFS_SET_NUMA_RANGE,
2624                                "numa_range", seq_no, err_rc);
2625 }
2626
2627 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
2628                                struct cYAML **err_rc)
2629 {
2630         struct lnet_ioctl_config_data data;
2631         int rc = LUSTRE_CFG_RC_NO_ERR;
2632         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2633
2634         /* -1 indicates to ignore changes to this field */
2635         if (tiny < -1 || small < -1 || large < -1) {
2636                 snprintf(err_str,
2637                          sizeof(err_str),
2638                          "\"tiny, small and large must be >= 0\"");
2639                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
2640                 goto out;
2641         }
2642
2643         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2644         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
2645         data.cfg_config_u.cfg_buffers.buf_small = small;
2646         data.cfg_config_u.cfg_buffers.buf_large = large;
2647
2648         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
2649         if (rc != 0) {
2650                 rc = -errno;
2651                 snprintf(err_str,
2652                          sizeof(err_str),
2653                          "\"cannot configure buffers: %s\"", strerror(errno));
2654                 goto out;
2655         }
2656
2657 out:
2658         cYAML_build_error(rc, seq_no, ADD_CMD, "buf", err_str, err_rc);
2659
2660         return rc;
2661 }
2662
2663 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
2664                              struct cYAML **err_rc, bool backup)
2665 {
2666         struct lnet_ioctl_config_data *data;
2667         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
2668         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2669         int l_errno = 0;
2670         char *buf;
2671         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
2672         int buf_count[LNET_NRBPOOLS] = {0};
2673         struct cYAML *root = NULL, *pools_node = NULL,
2674                      *type_node = NULL, *item = NULL, *cpt = NULL,
2675                      *first_seq = NULL, *buffers = NULL;
2676         int i, j;
2677         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2678         char node_name[LNET_MAX_STR_LEN];
2679         bool exist = false;
2680
2681         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
2682         if (buf == NULL)
2683                 goto out;
2684
2685         data = (struct lnet_ioctl_config_data *)buf;
2686
2687         root = cYAML_create_object(NULL, NULL);
2688         if (root == NULL)
2689                 goto out;
2690
2691         if (backup)
2692                 pools_node = cYAML_create_object(root, "routing");
2693         else
2694                 pools_node = cYAML_create_seq(root, "routing");
2695         if (pools_node == NULL)
2696                 goto out;
2697
2698         for (i = 0;; i++) {
2699                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
2700                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
2701                                         sizeof(struct lnet_ioctl_pool_cfg);
2702                 data->cfg_count = i;
2703
2704                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
2705                 if (rc != 0) {
2706                         l_errno = errno;
2707                         break;
2708                 }
2709
2710                 exist = true;
2711
2712                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
2713
2714                 if (backup)
2715                         goto calculate_buffers;
2716
2717                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
2718                 item = cYAML_create_seq_item(pools_node);
2719                 if (item == NULL)
2720                         goto out;
2721
2722                 if (first_seq == NULL)
2723                         first_seq = item;
2724
2725                 cpt = cYAML_create_object(item, node_name);
2726                 if (cpt == NULL)
2727                         goto out;
2728
2729 calculate_buffers:
2730                 /* create the tree  and print */
2731                 for (j = 0; j < LNET_NRBPOOLS; j++) {
2732                         if (!backup) {
2733                                 type_node = cYAML_create_object(cpt, pools[j]);
2734                                 if (type_node == NULL)
2735                                         goto out;
2736                         }
2737                         if (!backup &&
2738                             cYAML_create_number(type_node, "npages",
2739                                                 pool_cfg->pl_pools[j].pl_npages)
2740                             == NULL)
2741                                 goto out;
2742                         if (!backup &&
2743                             cYAML_create_number(type_node, "nbuffers",
2744                                                 pool_cfg->pl_pools[j].
2745                                                   pl_nbuffers) == NULL)
2746                                 goto out;
2747                         if (!backup &&
2748                             cYAML_create_number(type_node, "credits",
2749                                                 pool_cfg->pl_pools[j].
2750                                                    pl_credits) == NULL)
2751                                 goto out;
2752                         if (!backup &&
2753                             cYAML_create_number(type_node, "mincredits",
2754                                                 pool_cfg->pl_pools[j].
2755                                                    pl_mincredits) == NULL)
2756                                 goto out;
2757                         /* keep track of the total count for each of the
2758                          * tiny, small and large buffers */
2759                         buf_count[j] += pool_cfg->pl_pools[j].pl_nbuffers;
2760                 }
2761         }
2762
2763         if (pool_cfg != NULL) {
2764                 if (backup) {
2765                         if (cYAML_create_number(pools_node, "enable",
2766                                                 pool_cfg->pl_routing) ==
2767                         NULL)
2768                                 goto out;
2769
2770                         goto add_buffer_section;
2771                 }
2772
2773                 item = cYAML_create_seq_item(pools_node);
2774                 if (item == NULL)
2775                         goto out;
2776
2777                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
2778                     NULL)
2779                         goto out;
2780         }
2781
2782 add_buffer_section:
2783         /* create a buffers entry in the show. This is necessary so that
2784          * if the YAML output is used to configure a node, the buffer
2785          * configuration takes hold */
2786         buffers = cYAML_create_object(root, "buffers");
2787         if (buffers == NULL)
2788                 goto out;
2789
2790         for (i = 0; i < LNET_NRBPOOLS; i++) {
2791                 if (cYAML_create_number(buffers, pools[i], buf_count[i]) == NULL)
2792                         goto out;
2793         }
2794
2795         if (show_rc == NULL)
2796                 cYAML_print_tree(root);
2797
2798         if (l_errno != ENOENT) {
2799                 snprintf(err_str,
2800                          sizeof(err_str),
2801                          "\"cannot get routing information: %s\"",
2802                          strerror(l_errno));
2803                 rc = -l_errno;
2804                 goto out;
2805         } else
2806                 rc = LUSTRE_CFG_RC_NO_ERR;
2807
2808         snprintf(err_str, sizeof(err_str), "\"success\"");
2809         rc = LUSTRE_CFG_RC_NO_ERR;
2810
2811 out:
2812         free(buf);
2813         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2814                 cYAML_free_tree(root);
2815         } else if (show_rc != NULL && *show_rc != NULL) {
2816                 struct cYAML *routing_node;
2817                 /* there should exist only one routing block and one
2818                  * buffers block. If there already exists a previous one
2819                  * then don't add another */
2820                 routing_node = cYAML_get_object_item(*show_rc, "routing");
2821                 if (routing_node == NULL) {
2822                         cYAML_insert_sibling((*show_rc)->cy_child,
2823                                                 root->cy_child);
2824                         free(root);
2825                 } else {
2826                         cYAML_free_tree(root);
2827                 }
2828         } else {
2829                 *show_rc = root;
2830         }
2831
2832         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
2833
2834         return rc;
2835 }
2836
2837 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
2838                           struct cYAML **show_rc, struct cYAML **err_rc,
2839                           bool backup)
2840 {
2841         /*
2842          * TODO: This function is changing in a future patch to accommodate
2843          * PEER_LIST and proper filtering on any nid of the peer
2844          */
2845         struct lnet_ioctl_peer_cfg peer_info;
2846         struct lnet_peer_ni_credit_info *lpni_cri;
2847         struct lnet_ioctl_element_stats *lpni_stats;
2848         struct lnet_ioctl_element_msg_stats *msg_stats;
2849         struct lnet_ioctl_peer_ni_hstats *hstats;
2850         struct lnet_ioctl_construct_udsp_info udsp_info;
2851         lnet_nid_t *nidp;
2852         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2853         int i, j, k;
2854         int l_errno = 0;
2855         __u32 count;
2856         __u32 size;
2857         struct cYAML *root = NULL, *peer = NULL, *peer_ni = NULL,
2858                      *first_seq = NULL, *peer_root = NULL, *tmp = NULL,
2859                      *msg_statistics = NULL, *statistics = NULL,
2860                      *yhstats;
2861         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2862         struct lnet_process_id *list = NULL;
2863         void *data = NULL;
2864         void *lpni_data;
2865         bool exist = false;
2866
2867         /* create struct cYAML root object */
2868         root = cYAML_create_object(NULL, NULL);
2869         if (root == NULL)
2870                 goto out;
2871
2872         peer_root = cYAML_create_seq(root, "peer");
2873         if (peer_root == NULL)
2874                 goto out;
2875
2876         count = 1000;
2877         size = count * sizeof(struct lnet_process_id);
2878         list = malloc(size);
2879         if (list == NULL) {
2880                 l_errno = ENOMEM;
2881                 goto out;
2882         }
2883         if (knid != NULL) {
2884                 list[0].nid = libcfs_str2nid(knid);
2885                 count = 1;
2886         } else {
2887                 for (;;) {
2888                         memset(&peer_info, 0, sizeof(peer_info));
2889                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2890                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2891                         peer_info.prcfg_size = size;
2892                         peer_info.prcfg_bulk = list;
2893
2894                         l_errno = 0;
2895                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST,
2896                                      &peer_info);
2897                         count = peer_info.prcfg_count;
2898                         if (rc == 0)
2899                                 break;
2900                         l_errno = errno;
2901                         if (l_errno != E2BIG) {
2902                                 snprintf(err_str,
2903                                         sizeof(err_str),
2904                                         "\"cannot get peer list: %s\"",
2905                                         strerror(l_errno));
2906                                 rc = -l_errno;
2907                                 goto out;
2908                         }
2909                         free(list);
2910                         size = peer_info.prcfg_size;
2911                         list = malloc(size);
2912                         if (list == NULL) {
2913                                 l_errno = ENOMEM;
2914                                 goto out;
2915                         }
2916                 }
2917         }
2918
2919         size = 4096;
2920         data = malloc(size);
2921         if (data == NULL) {
2922                 l_errno = ENOMEM;
2923                 goto out;
2924         }
2925
2926         for (i = 0; i < count; i++) {
2927                 for (;;) {
2928                         memset(&peer_info, 0, sizeof(peer_info));
2929                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2930                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2931                         peer_info.prcfg_prim_nid = list[i].nid;
2932                         peer_info.prcfg_size = size;
2933                         peer_info.prcfg_bulk = data;
2934
2935                         l_errno = 0;
2936                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_NI,
2937                                      &peer_info);
2938                         if (rc == 0)
2939                                 break;
2940                         l_errno = errno;
2941                         if (l_errno != E2BIG) {
2942                                 snprintf(err_str,
2943                                         sizeof(err_str),
2944                                         "\"cannot get peer information: %s\"",
2945                                         strerror(l_errno));
2946                                 rc = -l_errno;
2947                                 goto out;
2948                         }
2949                         free(data);
2950                         size = peer_info.prcfg_size;
2951                         data = malloc(size);
2952                         if (data == NULL) {
2953                                 l_errno = ENOMEM;
2954                                 goto out;
2955                         }
2956                 }
2957                 exist = true;
2958
2959                 peer = cYAML_create_seq_item(peer_root);
2960                 if (peer == NULL)
2961                         goto out;
2962
2963                 if (first_seq == NULL)
2964                         first_seq = peer;
2965
2966                 lnet_nid_t pnid = peer_info.prcfg_prim_nid;
2967                 if (cYAML_create_string(peer, "primary nid",
2968                                         libcfs_nid2str(pnid))
2969                     == NULL)
2970                         goto out;
2971                 if (cYAML_create_string(peer, "Multi-Rail",
2972                                         peer_info.prcfg_mr ? "True" : "False")
2973                     == NULL)
2974                         goto out;
2975                 /*
2976                  * print out the state of the peer only if details are
2977                  * requested
2978                  */
2979                 if (detail >= 3) {
2980                         if (!backup &&
2981                             cYAML_create_number(peer, "peer state",
2982                                                 peer_info.prcfg_state)
2983                                 == NULL)
2984                                 goto out;
2985                 }
2986
2987                 tmp = cYAML_create_seq(peer, "peer ni");
2988                 if (tmp == NULL)
2989                         goto out;
2990
2991                 lpni_data = data;
2992                 for (j = 0; j < peer_info.prcfg_count; j++) {
2993                         nidp = lpni_data;
2994                         lpni_cri = (void*)nidp + sizeof(nidp);
2995                         lpni_stats = (void *)lpni_cri + sizeof(*lpni_cri);
2996                         msg_stats = (void *)lpni_stats + sizeof(*lpni_stats);
2997                         hstats = (void *)msg_stats + sizeof(*msg_stats);
2998                         lpni_data = (void *)hstats + sizeof(*hstats);
2999
3000                         peer_ni = cYAML_create_seq_item(tmp);
3001                         if (peer_ni == NULL)
3002                                 goto out;
3003
3004                         if (cYAML_create_string(peer_ni, "nid",
3005                                                 libcfs_nid2str(*nidp))
3006                             == NULL)
3007                                 goto out;
3008
3009                         if (backup)
3010                                 continue;
3011
3012                         if (detail < 4)
3013                                 goto continue_without_udsp_info;
3014
3015                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
3016                         udsp_info.cud_nid = *nidp;
3017                         udsp_info.cud_peer = true;
3018                         rc = l_ioctl(LNET_DEV_ID,
3019                                         IOC_LIBCFS_GET_CONST_UDSP_INFO,
3020                                         &udsp_info);
3021                         if (rc != 0) {
3022                                 l_errno = errno;
3023                                 goto continue_without_udsp_info;
3024                         }
3025
3026                         rc = create_remote_udsp_info(&udsp_info, peer_ni);
3027                         if (rc) {
3028                                 l_errno = errno;
3029                                 goto out;
3030                         }
3031
3032 continue_without_udsp_info:
3033                         if (cYAML_create_string(peer_ni, "state",
3034                                                 lpni_cri->cr_aliveness)
3035                             == NULL)
3036                                 goto out;
3037
3038                         if (!detail)
3039                                 continue;
3040
3041                         if (cYAML_create_number(peer_ni, "max_ni_tx_credits",
3042                                                 lpni_cri->cr_ni_peer_tx_credits)
3043                             == NULL)
3044                                 goto out;
3045
3046                         if (cYAML_create_number(peer_ni, "available_tx_credits",
3047                                                 lpni_cri->cr_peer_tx_credits)
3048                             == NULL)
3049                                 goto out;
3050
3051                         if (cYAML_create_number(peer_ni, "min_tx_credits",
3052                                                 lpni_cri->cr_peer_min_tx_credits)
3053                             == NULL)
3054                                 goto out;
3055
3056                         if (cYAML_create_number(peer_ni, "tx_q_num_of_buf",
3057                                                 lpni_cri->cr_peer_tx_qnob)
3058                             == NULL)
3059                                 goto out;
3060
3061                         if (cYAML_create_number(peer_ni, "available_rtr_credits",
3062                                                 lpni_cri->cr_peer_rtr_credits)
3063                             == NULL)
3064                                 goto out;
3065
3066                         if (cYAML_create_number(peer_ni, "min_rtr_credits",
3067                                                 lpni_cri->cr_peer_min_rtr_credits)
3068                             == NULL)
3069                                 goto out;
3070
3071                         if (cYAML_create_number(peer_ni, "refcount",
3072                                                 lpni_cri->cr_refcount) == NULL)
3073                                 goto out;
3074
3075                         statistics = cYAML_create_object(peer_ni, "statistics");
3076                         if (statistics == NULL)
3077                                 goto out;
3078
3079                         if (cYAML_create_number(statistics, "send_count",
3080                                                 lpni_stats->iel_send_count)
3081                             == NULL)
3082                                 goto out;
3083
3084                         if (cYAML_create_number(statistics, "recv_count",
3085                                                 lpni_stats->iel_recv_count)
3086                             == NULL)
3087                                 goto out;
3088
3089                         if (cYAML_create_number(statistics, "drop_count",
3090                                                 lpni_stats->iel_drop_count)
3091                             == NULL)
3092                                 goto out;
3093
3094                         if (detail < 2)
3095                                 continue;
3096
3097                         for (k = 0; k < 3; k++) {
3098                                 struct lnet_ioctl_comm_count *counts;
3099
3100                                 msg_statistics = cYAML_create_object(peer_ni,
3101                                                  (char *) gmsg_stat_names[k]);
3102                                 if (msg_statistics == NULL)
3103                                         goto out;
3104
3105                                 counts = get_counts(msg_stats, k);
3106                                 if (counts == NULL)
3107                                         goto out;
3108
3109                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
3110                                                                counts))
3111                                         goto out;
3112                         }
3113
3114                         yhstats = cYAML_create_object(peer_ni, "health stats");
3115                         if (!yhstats)
3116                                 goto out;
3117                         if (cYAML_create_number(yhstats, "health value",
3118                                                 hstats->hlpni_health_value)
3119                                                         == NULL)
3120                                 goto out;
3121                         if (cYAML_create_number(yhstats, "dropped",
3122                                                 hstats->hlpni_remote_dropped)
3123                                                         == NULL)
3124                                 goto out;
3125                         if (cYAML_create_number(yhstats, "timeout",
3126                                                 hstats->hlpni_remote_timeout)
3127                                                         == NULL)
3128                                 goto out;
3129                         if (cYAML_create_number(yhstats, "error",
3130                                                 hstats->hlpni_remote_error)
3131                                                         == NULL)
3132                                 goto out;
3133                         if (cYAML_create_number(yhstats, "network timeout",
3134                                                 hstats->hlpni_network_timeout)
3135                                                         == NULL)
3136                                 goto out;
3137                 }
3138         }
3139
3140         /* print output iff show_rc is not provided */
3141         if (show_rc == NULL)
3142                 cYAML_print_tree(root);
3143
3144         snprintf(err_str, sizeof(err_str), "\"success\"");
3145         rc = LUSTRE_CFG_RC_NO_ERR;
3146
3147 out:
3148         free(list);
3149         free(data);
3150         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
3151                 cYAML_free_tree(root);
3152         } else if (show_rc != NULL && *show_rc != NULL) {
3153                 struct cYAML *show_node;
3154                 /* find the peer node, if one doesn't exist then
3155                  * insert one.  Otherwise add to the one there
3156                  */
3157                 show_node = cYAML_get_object_item(*show_rc,
3158                                                   "peer");
3159                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3160                         cYAML_insert_child(show_node, first_seq);
3161                         free(peer_root);
3162                         free(root);
3163                 } else if (show_node == NULL) {
3164                         cYAML_insert_sibling((*show_rc)->cy_child,
3165                                              peer_root);
3166                         free(root);
3167                 } else {
3168                         cYAML_free_tree(root);
3169                 }
3170         } else {
3171                 *show_rc = root;
3172         }
3173
3174         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3175                           err_rc);
3176
3177         return rc;
3178 }
3179
3180 int lustre_lnet_list_peer(int seq_no,
3181                           struct cYAML **show_rc, struct cYAML **err_rc)
3182 {
3183         struct lnet_ioctl_peer_cfg peer_info;
3184         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3185         __u32 count;
3186         __u32 size;
3187         int i = 0;
3188         int l_errno = 0;
3189         struct cYAML *root = NULL, *list_root = NULL, *first_seq = NULL;
3190         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3191         struct lnet_process_id *list = NULL;
3192
3193         memset(&peer_info, 0, sizeof(peer_info));
3194
3195         /* create struct cYAML root object */
3196         root = cYAML_create_object(NULL, NULL);
3197         if (root == NULL)
3198                 goto out;
3199
3200         list_root = cYAML_create_seq(root, "peer list");
3201         if (list_root == NULL)
3202                 goto out;
3203
3204         count = 1000;
3205         size = count * sizeof(struct lnet_process_id);
3206         list = malloc(size);
3207         if (list == NULL) {
3208                 l_errno = ENOMEM;
3209                 goto out;
3210         }
3211         for (;;) {
3212                 LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
3213                 peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
3214                 peer_info.prcfg_size = size;
3215                 peer_info.prcfg_bulk = list;
3216
3217                 l_errno = 0;
3218                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST, &peer_info);
3219                 count = peer_info.prcfg_count;
3220                 if (rc == 0)
3221                         break;
3222                 l_errno = errno;
3223                 if (l_errno != E2BIG) {
3224                         snprintf(err_str,
3225                                 sizeof(err_str),
3226                                 "\"cannot get peer list: %s\"",
3227                                 strerror(l_errno));
3228                         rc = -l_errno;
3229                         goto out;
3230                 }
3231                 free(list);
3232                 size = peer_info.prcfg_size;
3233                 list = malloc(size);
3234                 if (list == NULL) {
3235                         l_errno = ENOMEM;
3236                         goto out;
3237                 }
3238         }
3239
3240         /* count is now the actual number of ids in the list. */
3241         for (i = 0; i < count; i++) {
3242                 if (cYAML_create_string(list_root, "nid",
3243                                         libcfs_nid2str(list[i].nid))
3244                     == NULL)
3245                         goto out;
3246         }
3247
3248         /* print output iff show_rc is not provided */
3249         if (show_rc == NULL)
3250                 cYAML_print_tree(root);
3251
3252         snprintf(err_str, sizeof(err_str), "\"success\"");
3253         rc = LUSTRE_CFG_RC_NO_ERR;
3254
3255 out:
3256         if (list != NULL)
3257                 free(list);
3258         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3259                 cYAML_free_tree(root);
3260         } else if (show_rc != NULL && *show_rc != NULL) {
3261                 struct cYAML *show_node;
3262                 /* find the peer node, if one doesn't exist then
3263                  * insert one.  Otherwise add to the one there
3264                  */
3265                 show_node = cYAML_get_object_item(*show_rc,
3266                                                   "peer");
3267                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3268                         cYAML_insert_child(show_node, first_seq);
3269                         free(list_root);
3270                         free(root);
3271                 } else if (show_node == NULL) {
3272                         cYAML_insert_sibling((*show_rc)->cy_child,
3273                                              list_root);
3274                         free(root);
3275                 } else {
3276                         cYAML_free_tree(root);
3277                 }
3278         } else {
3279                 *show_rc = root;
3280         }
3281
3282         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3283                           err_rc);
3284
3285         return rc;
3286 }
3287
3288 static void add_to_global(struct cYAML *show_rc, struct cYAML *node,
3289                           struct cYAML *root)
3290 {
3291         struct cYAML *show_node;
3292
3293         show_node = cYAML_get_object_item(show_rc, "global");
3294         if (show_node != NULL)
3295                 cYAML_insert_sibling(show_node->cy_child,
3296                                      node->cy_child);
3297         else
3298                 cYAML_insert_sibling(show_rc->cy_child,
3299                                      node);
3300         free(root);
3301 }
3302
3303 static int build_global_yaml_entry(char *err_str, int err_len, int seq_no,
3304                                    char *name, __u64 value,
3305                                    struct cYAML **show_rc,
3306                                    struct cYAML **err_rc, int err)
3307 {
3308         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3309         struct cYAML *root = NULL, *global = NULL;
3310
3311         if (err) {
3312                 rc = err;
3313                 goto out;
3314         }
3315
3316         root = cYAML_create_object(NULL, NULL);
3317         if (root == NULL)
3318                 goto out;
3319
3320         global = cYAML_create_object(root, "global");
3321         if (global == NULL)
3322                 goto out;
3323
3324         if (cYAML_create_number(global, name,
3325                                 value) == NULL)
3326                 goto out;
3327
3328         if (show_rc == NULL)
3329                 cYAML_print_tree(root);
3330
3331         snprintf(err_str, err_len, "\"success\"");
3332
3333         rc = LUSTRE_CFG_RC_NO_ERR;
3334
3335 out:
3336         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3337                 cYAML_free_tree(root);
3338         } else if (show_rc != NULL && *show_rc != NULL) {
3339                 add_to_global(*show_rc, global, root);
3340         } else {
3341                 *show_rc = root;
3342         }
3343
3344         cYAML_build_error(rc, seq_no, SHOW_CMD, "global", err_str, err_rc);
3345
3346         return rc;
3347 }
3348
3349 static int ioctl_show_global_values(int ioc, int seq_no, char *name,
3350                                     struct cYAML **show_rc,
3351                                     struct cYAML **err_rc)
3352 {
3353         struct lnet_ioctl_set_value data;
3354         int rc;
3355         int l_errno = 0;
3356         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3357
3358         LIBCFS_IOC_INIT_V2(data, sv_hdr);
3359
3360         rc = l_ioctl(LNET_DEV_ID, ioc, &data);
3361         if (rc != 0) {
3362                 l_errno = -errno;
3363                 snprintf(err_str,
3364                          sizeof(err_str),
3365                          "\"cannot get %s: %s\"",
3366                          name, strerror(l_errno));
3367         }
3368
3369         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no, name,
3370                                        data.sv_value, show_rc, err_rc, l_errno);
3371 }
3372
3373 int lustre_lnet_show_recov_intrv(int seq_no, struct cYAML **show_rc,
3374                                  struct cYAML **err_rc)
3375 {
3376         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3377         char val[LNET_MAX_STR_LEN];
3378         int intrv = -1, l_errno = 0;
3379         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3380
3381         rc = read_sysfs_file(modparam_path, "lnet_recovery_interval", val,
3382                              1, sizeof(val));
3383         if (rc) {
3384                 l_errno = -errno;
3385                 snprintf(err_str, sizeof(err_str),
3386                          "\"cannot get recovery interval: %d\"", rc);
3387         } else {
3388                 intrv = atoi(val);
3389         }
3390
3391         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3392                                        "recovery_interval", intrv, show_rc,
3393                                        err_rc, l_errno);
3394 }
3395
3396 int lustre_lnet_show_hsensitivity(int seq_no, struct cYAML **show_rc,
3397                                   struct cYAML **err_rc)
3398 {
3399         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3400         char val[LNET_MAX_STR_LEN];
3401         int sen = -1, l_errno = 0;
3402         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3403
3404         rc = read_sysfs_file(modparam_path, "lnet_health_sensitivity", val,
3405                              1, sizeof(val));
3406         if (rc) {
3407                 l_errno = -errno;
3408                 snprintf(err_str, sizeof(err_str),
3409                          "\"cannot get health sensitivity: %d\"", rc);
3410         } else {
3411                 sen = atoi(val);
3412         }
3413
3414         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3415                                        "health_sensitivity", sen, show_rc,
3416                                        err_rc, l_errno);
3417 }
3418
3419 int lustre_lnet_show_rtr_sensitivity(int seq_no, struct cYAML **show_rc,
3420                                      struct cYAML **err_rc)
3421 {
3422         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3423         char val[LNET_MAX_STR_LEN];
3424         int sen = -1, l_errno = 0;
3425         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3426
3427         rc = read_sysfs_file(modparam_path, "router_sensitivity_percentage", val,
3428                              1, sizeof(val));
3429         if (rc) {
3430                 l_errno = -errno;
3431                 snprintf(err_str, sizeof(err_str),
3432                          "\"cannot get router sensitivity percentage: %d\"", rc);
3433         } else {
3434                 sen = atoi(val);
3435         }
3436
3437         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3438                                        "router_sensitivity", sen, show_rc,
3439                                        err_rc, l_errno);
3440 }
3441
3442 int lustre_lnet_show_lnd_timeout(int seq_no, struct cYAML **show_rc,
3443                                  struct cYAML **err_rc)
3444 {
3445         char val[LNET_MAX_STR_LEN];
3446         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3447         int lnd_to = -1;
3448         int l_errno = 0;
3449         int rc;
3450         int fd;
3451         glob_t path;
3452
3453         rc = cfs_get_param_paths(&path, "lnet_lnd_timeout");
3454         if (rc < 0) {
3455                 l_errno = -errno;
3456                 snprintf(err_str, sizeof(err_str),
3457                          "\"cannot get LND timeout: %d\"", rc);
3458                 return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3459                                                "lnd_timeout", lnd_to, show_rc,
3460                                                err_rc, l_errno);
3461         }
3462
3463         fd = open(path.gl_pathv[0], O_RDONLY);
3464         if (fd < 0) {
3465                 l_errno = -errno;
3466                 snprintf(err_str, sizeof(err_str),
3467                          "\"error opening %s\"", path.gl_pathv[0]);
3468                 goto failed;
3469         }
3470
3471         rc = read(fd, val, sizeof(val));
3472         if (rc < 0)
3473                 l_errno = -errno;
3474
3475         close(fd);
3476
3477         if (rc < 0) {
3478                 snprintf(err_str, sizeof(err_str),
3479                          "\"error reading %s\"", path.gl_pathv[0]);
3480                 goto failed;
3481         }
3482
3483         lnd_to = atoi(val);
3484
3485 failed:
3486         cfs_free_param_data(&path);
3487
3488         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3489                                        "lnd_timeout", lnd_to, show_rc,
3490                                        err_rc, l_errno);
3491 }
3492
3493 int lustre_lnet_show_transaction_to(int seq_no, struct cYAML **show_rc,
3494                                     struct cYAML **err_rc)
3495 {
3496         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3497         char val[LNET_MAX_STR_LEN];
3498         int tto = -1, l_errno = 0;
3499         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3500
3501         rc = read_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
3502                              1, sizeof(val));
3503         if (rc) {
3504                 l_errno = -errno;
3505                 snprintf(err_str, sizeof(err_str),
3506                          "\"cannot get transaction timeout: %d\"", rc);
3507         } else {
3508                 tto = atoi(val);
3509         }
3510
3511         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3512                                        "transaction_timeout", tto, show_rc,
3513                                        err_rc, l_errno);
3514 }
3515
3516 int lustre_lnet_show_retry_count(int seq_no, struct cYAML **show_rc,
3517                                  struct cYAML **err_rc)
3518 {
3519         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3520         char val[LNET_MAX_STR_LEN];
3521         int retry_count = -1, l_errno = 0;
3522         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3523
3524         rc = read_sysfs_file(modparam_path, "lnet_retry_count", val,
3525                              1, sizeof(val));
3526         if (rc) {
3527                 l_errno = -errno;
3528                 snprintf(err_str, sizeof(err_str),
3529                          "\"cannot get retry count: %d\"", rc);
3530         } else {
3531                 retry_count = atoi(val);
3532         }
3533
3534         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3535                                        "retry_count", retry_count, show_rc,
3536                                        err_rc, l_errno);
3537 }
3538
3539 int lustre_lnet_calc_service_id(__u64 *service_id)
3540 {
3541         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3542         char val[LNET_MAX_STR_LEN];
3543         int service_port = -1, l_errno = 0;
3544
3545         rc = read_sysfs_file(o2ib_modparam_path, "service", val,
3546                              1, sizeof(val));
3547         if (rc) {
3548                 l_errno = errno;
3549                 fprintf(stderr, "error:\n    msg: \"cannot get service port: %s (%d)\"\n",
3550                         strerror(l_errno), -l_errno);
3551                 return rc;
3552         } else {
3553                 service_port = atoi(val);
3554         }
3555
3556         *service_id = htobe64(((__u64)RDMA_PS_TCP << 16) + service_port);
3557
3558         return LUSTRE_CFG_RC_NO_ERR;
3559 }
3560
3561 int show_recovery_queue(enum lnet_health_type type, char *name, int seq_no,
3562                         struct cYAML **show_rc, struct cYAML **err_rc)
3563 {
3564         struct lnet_ioctl_recovery_list nid_list;
3565         struct cYAML *root = NULL, *nids = NULL;
3566         int rc, i;
3567         char err_str[LNET_MAX_STR_LEN] = "failed to print recovery queue\n";
3568
3569         LIBCFS_IOC_INIT_V2(nid_list, rlst_hdr);
3570         nid_list.rlst_type = type;
3571
3572         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_RECOVERY_QUEUE, &nid_list);
3573         if (rc) {
3574                 rc = errno;
3575                 goto out;
3576         }
3577
3578         if (nid_list.rlst_num_nids == 0)
3579                 goto out;
3580
3581         root = cYAML_create_object(NULL, NULL);
3582         if (root == NULL)
3583                 goto out;
3584
3585         nids = cYAML_create_object(root, name);
3586         if (nids == NULL)
3587                 goto out;
3588
3589         rc = -EINVAL;
3590
3591         for (i = 0; i < nid_list.rlst_num_nids; i++) {
3592                 char nidenum[LNET_MAX_STR_LEN];
3593                 snprintf(nidenum, sizeof(nidenum), "nid-%d", i);
3594                 if (!cYAML_create_string(nids, nidenum,
3595                         libcfs_nid2str(nid_list.rlst_nid_array[i])))
3596                         goto out;
3597         }
3598
3599         snprintf(err_str, sizeof(err_str), "success\n");
3600
3601         rc = 0;
3602
3603 out:
3604         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3605                 cYAML_free_tree(root);
3606         } else if (show_rc != NULL && *show_rc != NULL) {
3607                 struct cYAML *show_node;
3608                 /* find the net node, if one doesn't exist
3609                  * then insert one.  Otherwise add to the one there
3610                  */
3611                 show_node = cYAML_get_object_item(*show_rc, name);
3612                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3613                         cYAML_insert_child(show_node, nids);
3614                         free(nids);
3615                         free(root);
3616                 } else if (show_node == NULL) {
3617                         cYAML_insert_sibling((*show_rc)->cy_child,
3618                                                 nids);
3619                         free(root);
3620                 } else {
3621                         cYAML_free_tree(root);
3622                 }
3623         } else {
3624                 *show_rc = root;
3625         }
3626
3627         cYAML_build_error(rc, seq_no, SHOW_CMD, name, err_str, err_rc);
3628
3629         return rc;
3630 }
3631
3632 int lustre_lnet_show_local_ni_recovq(int seq_no, struct cYAML **show_rc,
3633                                      struct cYAML **err_rc)
3634 {
3635         return show_recovery_queue(LNET_HEALTH_TYPE_LOCAL_NI, "local NI recovery",
3636                                    seq_no, show_rc, err_rc);
3637 }
3638
3639 int lustre_lnet_show_peer_ni_recovq(int seq_no, struct cYAML **show_rc,
3640                                     struct cYAML **err_rc)
3641 {
3642         return show_recovery_queue(LNET_HEALTH_TYPE_PEER_NI, "peer NI recovery",
3643                                    seq_no, show_rc, err_rc);
3644 }
3645
3646 int lustre_lnet_show_response_tracking(int seq_no, struct cYAML **show_rc,
3647                                        struct cYAML **err_rc)
3648 {
3649         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3650         char val[LNET_MAX_STR_LEN];
3651         int rsp_tracking = -1, l_errno = 0;
3652         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3653
3654         rc = read_sysfs_file(modparam_path, "lnet_response_tracking", val,
3655                              1, sizeof(val));
3656         if (rc) {
3657                 l_errno = -errno;
3658                 snprintf(err_str, sizeof(err_str),
3659                          "\"cannot get lnet_response_tracking value: %d\"", rc);
3660         } else {
3661                 rsp_tracking = atoi(val);
3662         }
3663
3664         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3665                                        "response_tracking", rsp_tracking,
3666                                        show_rc, err_rc, l_errno);
3667 }
3668
3669 int lustre_lnet_show_recovery_limit(int seq_no, struct cYAML **show_rc,
3670                                     struct cYAML **err_rc)
3671 {
3672         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3673         char val[LNET_MAX_STR_LEN];
3674         int recov_limit = -1, l_errno = 0;
3675         char err_str[LNET_MAX_STR_LEN];
3676
3677         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
3678
3679         rc = read_sysfs_file(modparam_path, "lnet_recovery_limit", val,
3680                              1, sizeof(val));
3681         if (rc) {
3682                 l_errno = -errno;
3683                 snprintf(err_str, sizeof(err_str),
3684                          "\"cannot get lnet_recovery_limit value: %d\"", rc);
3685         } else {
3686                 recov_limit = atoi(val);
3687         }
3688
3689         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3690                                        "recovery_limit", recov_limit,
3691                                        show_rc, err_rc, l_errno);
3692 }
3693
3694 int lustre_lnet_show_max_intf(int seq_no, struct cYAML **show_rc,
3695                               struct cYAML **err_rc)
3696 {
3697         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3698         char val[LNET_MAX_STR_LEN];
3699         int max_intf = -1, l_errno = 0;
3700         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3701
3702         rc = read_sysfs_file(modparam_path, "lnet_interfaces_max", val,
3703                              1, sizeof(val));
3704         if (rc) {
3705                 l_errno = -errno;
3706                 snprintf(err_str, sizeof(err_str),
3707                          "\"cannot get max interfaces: %d\"", rc);
3708         } else {
3709                 max_intf = atoi(val);
3710         }
3711
3712         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3713                                        "max_intf", max_intf, show_rc,
3714                                        err_rc, l_errno);
3715 }
3716
3717 int lustre_lnet_show_discovery(int seq_no, struct cYAML **show_rc,
3718                                struct cYAML **err_rc)
3719 {
3720         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3721         char val[LNET_MAX_STR_LEN];
3722         int discovery = -1, l_errno = 0;
3723         char err_str[LNET_MAX_STR_LEN]  = "\"out of memory\"";
3724
3725         rc = read_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
3726                              1, sizeof(val));
3727         if (rc) {
3728                 l_errno = -errno;
3729                 snprintf(err_str, sizeof(err_str),
3730                          "\"cannot get discovery setting: %d\"", rc);
3731         } else {
3732                 /*
3733                  * The kernel stores a discovery disabled value. User space
3734                  * shows whether discovery is enabled. So the value must be
3735                  * inverted.
3736                  */
3737                 discovery = !atoi(val);
3738         }
3739
3740         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3741                                        "discovery", discovery, show_rc,
3742                                        err_rc, l_errno);
3743 }
3744
3745 int lustre_lnet_show_drop_asym_route(int seq_no, struct cYAML **show_rc,
3746                                      struct cYAML **err_rc)
3747 {
3748         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3749         char val[LNET_MAX_STR_LEN];
3750         int drop_asym_route = -1, l_errno = 0;
3751         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3752
3753         rc = read_sysfs_file(modparam_path, "lnet_drop_asym_route", val,
3754                              1, sizeof(val));
3755         if (rc) {
3756                 l_errno = -errno;
3757                 snprintf(err_str, sizeof(err_str),
3758                          "\"cannot get drop asym route setting: %d\"", rc);
3759         } else {
3760                 drop_asym_route = atoi(val);
3761         }
3762
3763         return build_global_yaml_entry(err_str, sizeof(err_str), seq_no,
3764                                        "drop_asym_route", drop_asym_route,
3765                                        show_rc, err_rc, l_errno);
3766 }
3767
3768 int lustre_lnet_show_numa_range(int seq_no, struct cYAML **show_rc,
3769                                 struct cYAML **err_rc)
3770 {
3771         return ioctl_show_global_values(IOC_LIBCFS_GET_NUMA_RANGE, seq_no,
3772                                         "numa_range", show_rc, err_rc);
3773 }
3774
3775 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
3776                            struct cYAML **err_rc)
3777 {
3778         struct lnet_ioctl_lnet_stats data;
3779         struct lnet_counters *cntrs;
3780         int rc;
3781         int l_errno;
3782         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3783         struct cYAML *root = NULL, *stats = NULL;
3784
3785         LIBCFS_IOC_INIT_V2(data, st_hdr);
3786
3787         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LNET_STATS, &data);
3788         if (rc) {
3789                 l_errno = errno;
3790                 snprintf(err_str,
3791                          sizeof(err_str),
3792                          "\"cannot get lnet statistics: %s\"",
3793                          strerror(l_errno));
3794                 rc = -l_errno;
3795                 goto out;
3796         }
3797
3798         rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3799
3800         cntrs = &data.st_cntrs;
3801
3802         root = cYAML_create_object(NULL, NULL);
3803         if (!root)
3804                 goto out;
3805
3806         stats = cYAML_create_object(root, "statistics");
3807         if (!stats)
3808                 goto out;
3809
3810         if (!cYAML_create_number(stats, "msgs_alloc",
3811                                  cntrs->lct_common.lcc_msgs_alloc))
3812                 goto out;
3813
3814         if (!cYAML_create_number(stats, "msgs_max",
3815                                  cntrs->lct_common.lcc_msgs_max))
3816                 goto out;
3817
3818         if (!cYAML_create_number(stats, "rst_alloc",
3819                                  cntrs->lct_health.lch_rst_alloc))
3820                 goto out;
3821
3822         if (!cYAML_create_number(stats, "errors",
3823                                  cntrs->lct_common.lcc_errors))
3824                 goto out;
3825
3826         if (!cYAML_create_number(stats, "send_count",
3827                                  cntrs->lct_common.lcc_send_count))
3828                 goto out;
3829
3830         if (!cYAML_create_number(stats, "resend_count",
3831                                  cntrs->lct_health.lch_resend_count))
3832                 goto out;
3833
3834         if (!cYAML_create_number(stats, "response_timeout_count",
3835                                  cntrs->lct_health.lch_response_timeout_count))
3836                 goto out;
3837
3838         if (!cYAML_create_number(stats, "local_interrupt_count",
3839                                  cntrs->lct_health.lch_local_interrupt_count))
3840                 goto out;
3841
3842         if (!cYAML_create_number(stats, "local_dropped_count",
3843                                  cntrs->lct_health.lch_local_dropped_count))
3844                 goto out;
3845
3846         if (!cYAML_create_number(stats, "local_aborted_count",
3847                                  cntrs->lct_health.lch_local_aborted_count))
3848                 goto out;
3849
3850         if (!cYAML_create_number(stats, "local_no_route_count",
3851                                  cntrs->lct_health.lch_local_no_route_count))
3852                 goto out;
3853
3854         if (!cYAML_create_number(stats, "local_timeout_count",
3855                                  cntrs->lct_health.lch_local_timeout_count))
3856                 goto out;
3857
3858         if (!cYAML_create_number(stats, "local_error_count",
3859                                  cntrs->lct_health.lch_local_error_count))
3860                 goto out;
3861
3862         if (!cYAML_create_number(stats, "remote_dropped_count",
3863                                  cntrs->lct_health.lch_remote_dropped_count))
3864                 goto out;
3865
3866         if (!cYAML_create_number(stats, "remote_error_count",
3867                                  cntrs->lct_health.lch_remote_error_count))
3868                 goto out;
3869
3870         if (!cYAML_create_number(stats, "remote_timeout_count",
3871                                  cntrs->lct_health.lch_remote_timeout_count))
3872                 goto out;
3873
3874         if (!cYAML_create_number(stats, "network_timeout_count",
3875                                  cntrs->lct_health.lch_network_timeout_count))
3876                 goto out;
3877
3878         if (!cYAML_create_number(stats, "recv_count",
3879                                  cntrs->lct_common.lcc_recv_count))
3880                 goto out;
3881
3882         if (!cYAML_create_number(stats, "route_count",
3883                                  cntrs->lct_common.lcc_route_count))
3884                 goto out;
3885
3886         if (!cYAML_create_number(stats, "drop_count",
3887                                  cntrs->lct_common.lcc_drop_count))
3888                 goto out;
3889
3890         if (!cYAML_create_number(stats, "send_length",
3891                                  cntrs->lct_common.lcc_send_length))
3892                 goto out;
3893
3894         if (!cYAML_create_number(stats, "recv_length",
3895                                  cntrs->lct_common.lcc_recv_length))
3896                 goto out;
3897
3898         if (!cYAML_create_number(stats, "route_length",
3899                                  cntrs->lct_common.lcc_route_length))
3900                 goto out;
3901
3902         if (!cYAML_create_number(stats, "drop_length",
3903                                  cntrs->lct_common.lcc_drop_length))
3904                 goto out;
3905
3906         if (!show_rc)
3907                 cYAML_print_tree(root);
3908
3909         snprintf(err_str, sizeof(err_str), "\"success\"");
3910         rc = LUSTRE_CFG_RC_NO_ERR;
3911 out:
3912         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3913                 cYAML_free_tree(root);
3914         } else if (show_rc != NULL && *show_rc != NULL) {
3915                 cYAML_insert_sibling((*show_rc)->cy_child,
3916                                         root->cy_child);
3917                 free(root);
3918         } else {
3919                 *show_rc = root;
3920         }
3921
3922         cYAML_build_error(rc, seq_no, SHOW_CMD, "statistics", err_str, err_rc);
3923
3924         return rc;
3925 }
3926
3927 typedef int (*cmd_handler_t)(struct cYAML *tree,
3928                              struct cYAML **show_rc,
3929                              struct cYAML **err_rc);
3930
3931 static int handle_yaml_config_route(struct cYAML *tree, struct cYAML **show_rc,
3932                                     struct cYAML **err_rc)
3933 {
3934         struct cYAML *net, *gw, *hop, *prio, *sen, *seq_no;
3935
3936         net = cYAML_get_object_item(tree, "net");
3937         gw = cYAML_get_object_item(tree, "gateway");
3938         hop = cYAML_get_object_item(tree, "hop");
3939         prio = cYAML_get_object_item(tree, "priority");
3940         sen = cYAML_get_object_item(tree, "health_sensitivity");
3941         seq_no = cYAML_get_object_item(tree, "seq_no");
3942
3943         return lustre_lnet_config_route((net) ? net->cy_valuestring : NULL,
3944                                         (gw) ? gw->cy_valuestring : NULL,
3945                                         (hop) ? hop->cy_valueint : -1,
3946                                         (prio) ? prio->cy_valueint : -1,
3947                                         (sen) ? sen->cy_valueint : -1,
3948                                         (seq_no) ? seq_no->cy_valueint : -1,
3949                                         err_rc);
3950 }
3951
3952 /*
3953  *    interfaces:
3954  *        0: <intf_name>['['<expr>']']
3955  *        1: <intf_name>['['<expr>']']
3956  */
3957 static int yaml_copy_intf_info(struct cYAML *intf_tree,
3958                                struct lnet_dlc_network_descr *nw_descr)
3959 {
3960         struct cYAML *child = NULL;
3961         int intf_num = 0, rc = LUSTRE_CFG_RC_NO_ERR;
3962         struct lnet_dlc_intf_descr *intf_descr, *tmp;
3963
3964         if (intf_tree == NULL || nw_descr == NULL)
3965                 return LUSTRE_CFG_RC_BAD_PARAM;
3966
3967         /* now grab all the interfaces and their cpts */
3968         child = intf_tree->cy_child;
3969         while (child != NULL) {
3970                 if (child->cy_valuestring == NULL) {
3971                         child = child->cy_next;
3972                         continue;
3973                 }
3974
3975                 if (strlen(child->cy_valuestring) >= LNET_MAX_STR_LEN)
3976                         goto failed;
3977
3978                 rc = lustre_lnet_add_intf_descr(&nw_descr->nw_intflist,
3979                                                 child->cy_valuestring,
3980                                                 strlen(child->cy_valuestring));
3981                 if (rc != LUSTRE_CFG_RC_NO_ERR)
3982                         goto failed;
3983
3984                 intf_num++;
3985                 child = child->cy_next;
3986         }
3987
3988         if (intf_num == 0)
3989                 return LUSTRE_CFG_RC_MISSING_PARAM;
3990
3991         return intf_num;
3992
3993 failed:
3994         list_for_each_entry_safe(intf_descr, tmp, &nw_descr->nw_intflist,
3995                                  intf_on_network) {
3996                 list_del(&intf_descr->intf_on_network);
3997                 free_intf_descr(intf_descr);
3998         }
3999
4000         return rc;
4001 }
4002
4003 static bool
4004 yaml_extract_cmn_tunables(struct cYAML *tree,
4005                           struct lnet_ioctl_config_lnd_cmn_tunables *tunables,
4006                           struct cfs_expr_list **global_cpts)
4007 {
4008         struct cYAML *tun, *item, *smp;
4009         int rc;
4010
4011         tun = cYAML_get_object_item(tree, "tunables");
4012         if (tun != NULL) {
4013                 item = cYAML_get_object_item(tun, "peer_timeout");
4014                 if (item != NULL)
4015                         tunables->lct_peer_timeout = item->cy_valueint;
4016                 item = cYAML_get_object_item(tun, "peer_credits");
4017                 if (item != NULL)
4018                         tunables->lct_peer_tx_credits = item->cy_valueint;
4019                 item = cYAML_get_object_item(tun, "peer_buffer_credits");
4020                 if (item != NULL)
4021                         tunables->lct_peer_rtr_credits = item->cy_valueint;
4022                 item = cYAML_get_object_item(tun, "credits");
4023                 if (item != NULL)
4024                         tunables->lct_max_tx_credits = item->cy_valueint;
4025                 smp = cYAML_get_object_item(tun, "CPT");
4026                 if (smp != NULL) {
4027                         rc = cfs_expr_list_parse(smp->cy_valuestring,
4028                                                  strlen(smp->cy_valuestring),
4029                                                  0, UINT_MAX, global_cpts);
4030                         if (rc != 0)
4031                                 *global_cpts = NULL;
4032                 }
4033
4034                 return true;
4035         }
4036
4037         return false;
4038 }
4039
4040 static bool
4041 yaml_extract_tunables(struct cYAML *tree,
4042                       struct lnet_ioctl_config_lnd_tunables *tunables,
4043                       struct cfs_expr_list **global_cpts,
4044                       __u32 net_type)
4045 {
4046         bool rc;
4047
4048         rc = yaml_extract_cmn_tunables(tree, &tunables->lt_cmn,
4049                                        global_cpts);
4050
4051         if (!rc)
4052                 return rc;
4053
4054         lustre_yaml_extract_lnd_tunables(tree, net_type,
4055                                          &tunables->lt_tun);
4056
4057         return rc;
4058 }
4059
4060 /*
4061  * net:
4062  *    - net type: <net>[<NUM>]
4063   *      local NI(s):
4064  *        - nid: <ip>@<net>[<NUM>]
4065  *          status: up
4066  *          interfaces:
4067  *               0: <intf_name>['['<expr>']']
4068  *               1: <intf_name>['['<expr>']']
4069  *        tunables:
4070  *               peer_timeout: <NUM>
4071  *               peer_credits: <NUM>
4072  *               peer_buffer_credits: <NUM>
4073  *               credits: <NUM>
4074 *         lnd tunables:
4075  *               peercredits_hiw: <NUM>
4076  *               map_on_demand: <NUM>
4077  *               concurrent_sends: <NUM>
4078  *               fmr_pool_size: <NUM>
4079  *               fmr_flush_trigger: <NUM>
4080  *               fmr_cache: <NUM>
4081  *
4082  * At least one interface is required. If no interfaces are provided the
4083  * network interface can not be configured.
4084  */
4085 static int handle_yaml_config_ni(struct cYAML *tree, struct cYAML **show_rc,
4086                                  struct cYAML **err_rc)
4087 {
4088         struct cYAML *net, *intf, *seq_no, *ip2net = NULL, *local_nis = NULL,
4089                      *item = NULL;
4090         int num_entries = 0, rc;
4091         struct lnet_dlc_network_descr nw_descr;
4092         struct cfs_expr_list *global_cpts = NULL;
4093         struct lnet_ioctl_config_lnd_tunables tunables;
4094         bool found = false;
4095
4096         memset(&tunables, 0, sizeof(tunables));
4097
4098         INIT_LIST_HEAD(&nw_descr.network_on_rule);
4099         INIT_LIST_HEAD(&nw_descr.nw_intflist);
4100
4101         ip2net = cYAML_get_object_item(tree, "ip2net");
4102         net = cYAML_get_object_item(tree, "net type");
4103         if (net)
4104                 nw_descr.nw_id = libcfs_str2net(net->cy_valuestring);
4105         else
4106                 nw_descr.nw_id = LOLND;
4107
4108         /*
4109          * if neither net nor ip2nets are present, then we can not
4110          * configure the network.
4111          */
4112         if (!net && !ip2net)
4113                 return LUSTRE_CFG_RC_MISSING_PARAM;
4114
4115         local_nis = cYAML_get_object_item(tree, "local NI(s)");
4116         if (local_nis == NULL)
4117                 return LUSTRE_CFG_RC_MISSING_PARAM;
4118
4119         if (!cYAML_is_sequence(local_nis))
4120                 return LUSTRE_CFG_RC_BAD_PARAM;
4121
4122         while (cYAML_get_next_seq_item(local_nis, &item) != NULL) {
4123                 intf = cYAML_get_object_item(item, "interfaces");
4124                 if (intf == NULL)
4125                         continue;
4126                 num_entries = yaml_copy_intf_info(intf, &nw_descr);
4127                 if (num_entries <= 0) {
4128                         cYAML_build_error(num_entries, -1, "ni", "add",
4129                                         "bad interface list",
4130                                         err_rc);
4131                         return LUSTRE_CFG_RC_BAD_PARAM;
4132                 }
4133         }
4134
4135         found = yaml_extract_tunables(tree, &tunables, &global_cpts,
4136                                       LNET_NETTYP(nw_descr.nw_id));
4137         seq_no = cYAML_get_object_item(tree, "seq_no");
4138
4139         rc = lustre_lnet_config_ni(&nw_descr,
4140                                    global_cpts,
4141                                    (ip2net) ? ip2net->cy_valuestring : NULL,
4142                                    (found) ? &tunables: NULL,
4143                                    (seq_no) ? seq_no->cy_valueint : -1,
4144                                    err_rc);
4145
4146         if (global_cpts != NULL)
4147                 cfs_expr_list_free(global_cpts);
4148
4149         return rc;
4150 }
4151
4152 /*
4153  * ip2nets:
4154  *  - net-spec: <tcp|o2ib|gni>[NUM]
4155  *    interfaces:
4156  *        0: <intf name>['['<expr>']']
4157  *        1: <intf name>['['<expr>']']
4158  *    ip-range:
4159  *        0: <expr.expr.expr.expr>
4160  *        1: <expr.expr.expr.expr>
4161  */
4162 static int handle_yaml_config_ip2nets(struct cYAML *tree,
4163                                       struct cYAML **show_rc,
4164                                       struct cYAML **err_rc)
4165 {
4166         struct cYAML *net, *ip_range, *item = NULL, *intf = NULL,
4167                      *seq_no = NULL;
4168         struct lustre_lnet_ip2nets ip2nets;
4169         struct lustre_lnet_ip_range_descr *ip_range_descr = NULL,
4170                                           *tmp = NULL;
4171         int rc = LUSTRE_CFG_RC_NO_ERR;
4172         struct cfs_expr_list *global_cpts = NULL;
4173         struct cfs_expr_list *el, *el_tmp;
4174         struct lnet_ioctl_config_lnd_tunables tunables;
4175         struct lnet_dlc_intf_descr *intf_descr, *intf_tmp;
4176         bool found = false;
4177
4178         memset(&tunables, 0, sizeof(tunables));
4179
4180         /* initialize all lists */
4181         INIT_LIST_HEAD(&ip2nets.ip2nets_ip_ranges);
4182         INIT_LIST_HEAD(&ip2nets.ip2nets_net.network_on_rule);
4183         INIT_LIST_HEAD(&ip2nets.ip2nets_net.nw_intflist);
4184
4185         net = cYAML_get_object_item(tree, "net-spec");
4186         if (net == NULL)
4187                 return LUSTRE_CFG_RC_BAD_PARAM;
4188
4189         if (net != NULL && net->cy_valuestring == NULL)
4190                 return LUSTRE_CFG_RC_BAD_PARAM;
4191
4192         /* assign the network id */
4193         ip2nets.ip2nets_net.nw_id = libcfs_str2net(net->cy_valuestring);
4194         if (ip2nets.ip2nets_net.nw_id == LNET_NID_ANY)
4195                 return LUSTRE_CFG_RC_BAD_PARAM;
4196
4197         seq_no = cYAML_get_object_item(tree, "seq_no");
4198
4199         intf = cYAML_get_object_item(tree, "interfaces");
4200         if (intf != NULL) {
4201                 rc = yaml_copy_intf_info(intf, &ip2nets.ip2nets_net);
4202                 if (rc <= 0)
4203                         return LUSTRE_CFG_RC_BAD_PARAM;
4204         }
4205
4206         ip_range = cYAML_get_object_item(tree, "ip-range");
4207         if (ip_range != NULL) {
4208                 item = ip_range->cy_child;
4209                 while (item != NULL) {
4210                         if (item->cy_valuestring == NULL) {
4211                                 item = item->cy_next;
4212                                 continue;
4213                         }
4214
4215                         rc = lustre_lnet_add_ip_range(&ip2nets.ip2nets_ip_ranges,
4216                                                       item->cy_valuestring);
4217
4218                         if (rc != LUSTRE_CFG_RC_NO_ERR)
4219                                 goto out;
4220
4221                         item = item->cy_next;
4222                 }
4223         }
4224
4225         found = yaml_extract_tunables(tree, &tunables, &global_cpts,
4226                                       LNET_NETTYP(ip2nets.ip2nets_net.nw_id));
4227
4228         rc = lustre_lnet_config_ip2nets(&ip2nets,
4229                         (found) ? &tunables : NULL,
4230                         global_cpts,
4231                         (seq_no) ? seq_no->cy_valueint : -1,
4232                         err_rc);
4233
4234         /*
4235          * don't stop because there was no match. Continue processing the
4236          * rest of the rules. If non-match then nothing is configured
4237          */
4238         if (rc == LUSTRE_CFG_RC_NO_MATCH)
4239                 rc = LUSTRE_CFG_RC_NO_ERR;
4240 out:
4241         list_for_each_entry_safe(intf_descr, intf_tmp,
4242                                  &ip2nets.ip2nets_net.nw_intflist,
4243                                  intf_on_network) {
4244                 list_del(&intf_descr->intf_on_network);
4245                 free_intf_descr(intf_descr);
4246         }
4247
4248         list_for_each_entry_safe(ip_range_descr, tmp,
4249                                  &ip2nets.ip2nets_ip_ranges,
4250                                  ipr_entry) {
4251                 list_del(&ip_range_descr->ipr_entry);
4252                 list_for_each_entry_safe(el, el_tmp, &ip_range_descr->ipr_expr,
4253                                          el_link) {
4254                         list_del(&el->el_link);
4255                         cfs_expr_list_free(el);
4256                 }
4257                 free(ip_range_descr);
4258         }
4259
4260         return rc;
4261 }
4262
4263 static int handle_yaml_del_ni(struct cYAML *tree, struct cYAML **show_rc,
4264                               struct cYAML **err_rc)
4265 {
4266         struct cYAML *net = NULL, *intf = NULL, *seq_no = NULL, *item = NULL,
4267                      *local_nis = NULL;
4268         int num_entries, rc;
4269         struct lnet_dlc_network_descr nw_descr;
4270
4271         INIT_LIST_HEAD(&nw_descr.network_on_rule);
4272         INIT_LIST_HEAD(&nw_descr.nw_intflist);
4273
4274         net = cYAML_get_object_item(tree, "net type");
4275         if (net != NULL)
4276                 nw_descr.nw_id = libcfs_str2net(net->cy_valuestring);
4277
4278         local_nis = cYAML_get_object_item(tree, "local NI(s)");
4279         if (local_nis == NULL)
4280                 return LUSTRE_CFG_RC_MISSING_PARAM;
4281
4282         if (!cYAML_is_sequence(local_nis))
4283                 return LUSTRE_CFG_RC_BAD_PARAM;
4284
4285         while (cYAML_get_next_seq_item(local_nis, &item) != NULL) {
4286                 intf = cYAML_get_object_item(item, "interfaces");
4287                 if (intf == NULL)
4288                         continue;
4289                 num_entries = yaml_copy_intf_info(intf, &nw_descr);
4290                 if (num_entries <= 0) {
4291                         cYAML_build_error(num_entries, -1, "ni", "add",
4292                                         "bad interface list",
4293                                         err_rc);
4294                         return LUSTRE_CFG_RC_BAD_PARAM;
4295                 }
4296         }
4297
4298         seq_no = cYAML_get_object_item(tree, "seq_no");
4299
4300         rc = lustre_lnet_del_ni((net) ? &nw_descr : NULL,
4301                                 (seq_no) ? seq_no->cy_valueint : -1,
4302                                 err_rc);
4303
4304         return rc;
4305 }
4306
4307 /* Create a nidstring parseable by the nidstrings library from the nid
4308  * information encoded in the CYAML structure.
4309  * NOTE: Caller must free memory allocated to nidstr
4310  */
4311 static int yaml_nids2nidstr(struct cYAML *nids_entry, char **nidstr,
4312                             char *prim_nid, int cmd)
4313 {
4314         int num_strs = 0, rc;
4315         size_t buf_size, buf_pos, nidstr_len = 0;
4316         char *buffer;
4317         struct cYAML *child = NULL, *entry = NULL;
4318
4319         if (cYAML_is_sequence(nids_entry)) {
4320                 while (cYAML_get_next_seq_item(nids_entry, &child)) {
4321                         entry = cYAML_get_object_item(child, "nid");
4322                         /* don't count an empty entry */
4323                         if (!entry || !entry->cy_valuestring)
4324                                 continue;
4325
4326                         if (prim_nid &&
4327                             (strcmp(entry->cy_valuestring, prim_nid) == 0)) {
4328                                 if (cmd == LNETCTL_DEL_CMD) {
4329                                         /*
4330                                          * primary nid is present in the list of
4331                                          * nids so that means we want to delete
4332                                          * the entire peer, so no need to go
4333                                          * further. Just delete the entire peer.
4334                                          */
4335                                         return LUSTRE_CFG_RC_NO_ERR;
4336                                 } else {
4337                                         continue;
4338                                 }
4339                         }
4340
4341                         /*
4342                          * + 1 for the space separating each string, and
4343                          * accounts for the terminating null char
4344                          */
4345                         nidstr_len += strlen(entry->cy_valuestring) + 1;
4346                         num_strs++;
4347                 }
4348         }
4349
4350         if (num_strs == 0 && !prim_nid)
4351                 return LUSTRE_CFG_RC_MISSING_PARAM;
4352         else if (num_strs == 0) /* Only the primary nid was given to add/del */
4353                 return LUSTRE_CFG_RC_NO_ERR;
4354
4355         buffer = malloc(nidstr_len);
4356         if (!buffer)
4357                 return LUSTRE_CFG_RC_OUT_OF_MEM;
4358
4359         /* now grab all the nids */
4360         rc = 0;
4361         buf_pos = 0;
4362         buf_size = nidstr_len;
4363         child = NULL;
4364         while (cYAML_get_next_seq_item(nids_entry, &child)) {
4365                 entry = cYAML_get_object_item(child, "nid");
4366                 if (!entry || !entry->cy_valuestring)
4367                         continue;
4368
4369                 if (prim_nid &&
4370                     (strcmp(entry->cy_valuestring, prim_nid) == 0))
4371                         continue;
4372
4373                 if (buf_pos) {
4374                         rc = snprintf(buffer + buf_pos, buf_size, " ");
4375                         buf_pos += (rc < buf_size) ? rc : buf_size;
4376                         buf_size = nidstr_len - buf_pos;
4377                 }
4378
4379                 rc = snprintf(buffer + buf_pos, buf_size, "%s",
4380                               entry->cy_valuestring);
4381                 buf_pos += (rc < buf_size) ? rc : buf_size;
4382                 buf_size = nidstr_len - buf_pos;
4383         }
4384
4385         *nidstr = buffer;
4386
4387         return LUSTRE_CFG_RC_NO_ERR;
4388 }
4389
4390 static int handle_yaml_peer_common(struct cYAML *tree, struct cYAML **show_rc,
4391                                    struct cYAML **err_rc, int cmd)
4392 {
4393         int rc, num_nids = 0, seqn;
4394         bool mr_value = false;
4395         char *nidstr = NULL, *prim_nidstr;
4396         char err_str[LNET_MAX_STR_LEN];
4397         struct cYAML *seq_no, *prim_nid, *mr, *peer_nis;
4398         lnet_nid_t lnet_nidlist[LNET_MAX_NIDS_PER_PEER];
4399         lnet_nid_t pnid = LNET_NID_ANY;
4400
4401         seq_no = cYAML_get_object_item(tree, "seq_no");
4402         seqn = seq_no ? seq_no->cy_valueint : -1;
4403
4404         prim_nid = cYAML_get_object_item(tree, "primary nid");
4405         peer_nis = cYAML_get_object_item(tree, "peer ni");
4406         if (!prim_nid) {
4407                 rc = LUSTRE_CFG_RC_BAD_PARAM;
4408                 snprintf(err_str, LNET_MAX_STR_LEN,
4409                          "\"primary nid\" must be specified");
4410                 goto failed;
4411         }
4412
4413         prim_nidstr = prim_nid->cy_valuestring;
4414
4415         /* if the provided primary NID is bad, no need to go any further */
4416         pnid = libcfs_str2nid(prim_nidstr);
4417         if (pnid == LNET_NID_ANY) {
4418                 rc = LUSTRE_CFG_RC_BAD_PARAM;
4419                 snprintf(err_str, LNET_MAX_STR_LEN,
4420                         "badly formatted primary NID: %s", prim_nidstr);
4421                 goto failed;
4422         }
4423
4424         rc = yaml_nids2nidstr(peer_nis, &nidstr, prim_nidstr, cmd);
4425         if (rc == LUSTRE_CFG_RC_MISSING_PARAM) {
4426                 snprintf(err_str, LNET_MAX_STR_LEN,
4427                          "No nids defined in YAML block");
4428                 goto failed;
4429         } else if (rc == LUSTRE_CFG_RC_OUT_OF_MEM) {
4430                 snprintf(err_str, LNET_MAX_STR_LEN, "out of memory");
4431                 goto failed;
4432         } else if (rc != LUSTRE_CFG_RC_NO_ERR) {
4433                 snprintf(err_str, LNET_MAX_STR_LEN,
4434                          "Unrecognized error %d", rc);
4435                 goto failed;
4436         }
4437
4438         num_nids = 0;
4439         if (nidstr) {
4440                 num_nids = lustre_lnet_parse_nidstr(nidstr, lnet_nidlist,
4441                                                     LNET_MAX_NIDS_PER_PEER,
4442                                                     err_str);
4443                 if (num_nids < 0) {
4444                         rc = num_nids;
4445                         goto failed;
4446                 }
4447         }
4448
4449         if (cmd == LNETCTL_ADD_CMD) {
4450                 mr = cYAML_get_object_item(tree, "Multi-Rail");
4451                 mr_value = true;
4452                 if (mr && mr->cy_valuestring) {
4453                         if (strcmp(mr->cy_valuestring, "False") == 0)
4454                                 mr_value = false;
4455                         else if (strcmp(mr->cy_valuestring, "True") != 0) {
4456                                 rc = LUSTRE_CFG_RC_BAD_PARAM;
4457                                 snprintf(err_str, LNET_MAX_STR_LEN,
4458                                          "Multi-Rail must be set to \"True\" or \"False\" found \"%s\"",
4459                                          mr->cy_valuestring);
4460                                 goto failed;
4461                         }
4462                 }
4463         }
4464
4465         rc = lustre_lnet_mod_peer_nidlist(pnid, lnet_nidlist, cmd,
4466                                           num_nids, mr_value, seqn,
4467                                           err_rc);
4468
4469 failed:
4470         if (nidstr)
4471                 free(nidstr);
4472
4473         if (rc != LUSTRE_CFG_RC_NO_ERR)
4474                 cYAML_build_error(rc, seqn, "peer",
4475                                   cmd == LNETCTL_ADD_CMD ? ADD_CMD : DEL_CMD,
4476                                   err_str, err_rc);
4477
4478         return rc;
4479 }
4480
4481 static int handle_yaml_config_peer(struct cYAML *tree, struct cYAML **show_rc,
4482                                    struct cYAML **err_rc)
4483 {
4484         return handle_yaml_peer_common(tree, show_rc, err_rc, LNETCTL_ADD_CMD);
4485 }
4486
4487 static int handle_yaml_del_peer(struct cYAML *tree, struct cYAML **show_rc,
4488                                 struct cYAML **err_rc)
4489 {
4490         return handle_yaml_peer_common(tree, show_rc, err_rc, LNETCTL_DEL_CMD);
4491 }
4492
4493 static int handle_yaml_config_buffers(struct cYAML *tree,
4494                                       struct cYAML **show_rc,
4495                                       struct cYAML **err_rc)
4496 {
4497         int rc;
4498         struct cYAML *tiny, *small, *large, *seq_no;
4499
4500         tiny = cYAML_get_object_item(tree, "tiny");
4501         small = cYAML_get_object_item(tree, "small");
4502         large = cYAML_get_object_item(tree, "large");
4503         seq_no = cYAML_get_object_item(tree, "seq_no");
4504
4505         rc = lustre_lnet_config_buffers((tiny) ? tiny->cy_valueint : -1,
4506                                         (small) ? small->cy_valueint : -1,
4507                                         (large) ? large->cy_valueint : -1,
4508                                         (seq_no) ? seq_no->cy_valueint : -1,
4509                                         err_rc);
4510
4511         return rc;
4512 }
4513
4514 static int handle_yaml_config_routing(struct cYAML *tree,
4515                                       struct cYAML **show_rc,
4516                                       struct cYAML **err_rc)
4517 {
4518         int rc = LUSTRE_CFG_RC_NO_ERR;
4519         struct cYAML *seq_no, *enable;
4520
4521         seq_no = cYAML_get_object_item(tree, "seq_no");
4522         enable = cYAML_get_object_item(tree, "enable");
4523
4524         if (enable) {
4525                 rc = lustre_lnet_enable_routing(enable->cy_valueint,
4526                                                 (seq_no) ?
4527                                                     seq_no->cy_valueint : -1,
4528                                                 err_rc);
4529         }
4530
4531         return rc;
4532 }
4533
4534 static int handle_yaml_del_route(struct cYAML *tree, struct cYAML **show_rc,
4535                                  struct cYAML **err_rc)
4536 {
4537         struct cYAML *net;
4538         struct cYAML *gw;
4539         struct cYAML *seq_no;
4540
4541         net = cYAML_get_object_item(tree, "net");
4542         gw = cYAML_get_object_item(tree, "gateway");
4543         seq_no = cYAML_get_object_item(tree, "seq_no");
4544
4545         return lustre_lnet_del_route((net) ? net->cy_valuestring : NULL,
4546                                      (gw) ? gw->cy_valuestring : NULL,
4547                                      (seq_no) ? seq_no->cy_valueint : -1,
4548                                      err_rc);
4549 }
4550
4551 static int handle_yaml_del_routing(struct cYAML *tree, struct cYAML **show_rc,
4552                                    struct cYAML **err_rc)
4553 {
4554         struct cYAML *seq_no;
4555
4556         seq_no = cYAML_get_object_item(tree, "seq_no");
4557
4558         return lustre_lnet_enable_routing(0, (seq_no) ?
4559                                                 seq_no->cy_valueint : -1,
4560                                         err_rc);
4561 }
4562
4563 static int handle_yaml_show_route(struct cYAML *tree, struct cYAML **show_rc,
4564                                   struct cYAML **err_rc)
4565 {
4566         struct cYAML *net;
4567         struct cYAML *gw;
4568         struct cYAML *hop;
4569         struct cYAML *prio;
4570         struct cYAML *detail;
4571         struct cYAML *seq_no;
4572
4573         net = cYAML_get_object_item(tree, "net");
4574         gw = cYAML_get_object_item(tree, "gateway");
4575         hop = cYAML_get_object_item(tree, "hop");
4576         prio = cYAML_get_object_item(tree, "priority");
4577         detail = cYAML_get_object_item(tree, "detail");
4578         seq_no = cYAML_get_object_item(tree, "seq_no");
4579
4580         return lustre_lnet_show_route((net) ? net->cy_valuestring : NULL,
4581                                       (gw) ? gw->cy_valuestring : NULL,
4582                                       (hop) ? hop->cy_valueint : -1,
4583                                       (prio) ? prio->cy_valueint : -1,
4584                                       (detail) ? detail->cy_valueint : 0,
4585                                       (seq_no) ? seq_no->cy_valueint : -1,
4586                                       show_rc, err_rc, false);
4587 }
4588
4589 static int handle_yaml_show_net(struct cYAML *tree, struct cYAML **show_rc,
4590                                 struct cYAML **err_rc)
4591 {
4592         struct cYAML *net, *detail, *seq_no;
4593
4594         net = cYAML_get_object_item(tree, "net");
4595         detail = cYAML_get_object_item(tree, "detail");
4596         seq_no = cYAML_get_object_item(tree, "seq_no");
4597
4598         return lustre_lnet_show_net((net) ? net->cy_valuestring : NULL,
4599                                     (detail) ? detail->cy_valueint : 0,
4600                                     (seq_no) ? seq_no->cy_valueint : -1,
4601                                     show_rc, err_rc, false);
4602 }
4603
4604 static int handle_yaml_show_routing(struct cYAML *tree, struct cYAML **show_rc,
4605                                     struct cYAML **err_rc)
4606 {
4607         struct cYAML *seq_no;
4608
4609         seq_no = cYAML_get_object_item(tree, "seq_no");
4610
4611         return lustre_lnet_show_routing((seq_no) ? seq_no->cy_valueint : -1,
4612                                         show_rc, err_rc, false);
4613 }
4614
4615 static int handle_yaml_show_peers(struct cYAML *tree, struct cYAML **show_rc,
4616                                   struct cYAML **err_rc)
4617 {
4618         struct cYAML *seq_no, *nid, *detail;
4619
4620         seq_no = cYAML_get_object_item(tree, "seq_no");
4621         detail = cYAML_get_object_item(tree, "detail");
4622         nid = cYAML_get_object_item(tree, "nid");
4623
4624         return lustre_lnet_show_peer((nid) ? nid->cy_valuestring : NULL,
4625                                      (detail) ? detail->cy_valueint : 0,
4626                                      (seq_no) ? seq_no->cy_valueint : -1,
4627                                      show_rc, err_rc, false);
4628 }
4629
4630 static int handle_yaml_show_stats(struct cYAML *tree, struct cYAML **show_rc,
4631                                   struct cYAML **err_rc)
4632 {
4633         struct cYAML *seq_no;
4634
4635         seq_no = cYAML_get_object_item(tree, "seq_no");
4636
4637         return lustre_lnet_show_stats((seq_no) ? seq_no->cy_valueint : -1,
4638                                       show_rc, err_rc);
4639 }
4640
4641 static int handle_yaml_config_numa(struct cYAML *tree, struct cYAML **show_rc,
4642                                   struct cYAML **err_rc)
4643 {
4644         struct cYAML *seq_no, *range;
4645
4646         seq_no = cYAML_get_object_item(tree, "seq_no");
4647         range = cYAML_get_object_item(tree, "range");
4648
4649         return lustre_lnet_config_numa_range(range ? range->cy_valueint : -1,
4650                                              seq_no ? seq_no->cy_valueint : -1,
4651                                              err_rc);
4652 }
4653
4654 static int handle_yaml_del_numa(struct cYAML *tree, struct cYAML **show_rc,
4655                                struct cYAML **err_rc)
4656 {
4657         struct cYAML *seq_no;
4658
4659         seq_no = cYAML_get_object_item(tree, "seq_no");
4660
4661         return lustre_lnet_config_numa_range(0, seq_no ? seq_no->cy_valueint : -1,
4662                                              err_rc);
4663 }
4664
4665 static int handle_yaml_show_numa(struct cYAML *tree, struct cYAML **show_rc,
4666                                 struct cYAML **err_rc)
4667 {
4668         struct cYAML *seq_no;
4669
4670         seq_no = cYAML_get_object_item(tree, "seq_no");
4671
4672         return lustre_lnet_show_numa_range(seq_no ? seq_no->cy_valueint : -1,
4673                                            show_rc, err_rc);
4674 }
4675
4676 static int handle_yaml_del_udsp(struct cYAML *tree, struct cYAML **show_rc,
4677                                 struct cYAML **err_rc)
4678 {
4679         struct cYAML *seq_no, *idx;
4680
4681         seq_no = cYAML_get_object_item(tree, "seq_no");
4682         idx = cYAML_get_object_item(tree, "idx");
4683
4684         return lustre_lnet_del_udsp(idx ? idx->cy_valueint : -1,
4685                                     seq_no ? seq_no->cy_valueint : -1,
4686                                     err_rc);
4687 }
4688
4689 static int handle_yaml_config_udsp(struct cYAML *tree, struct cYAML **show_rc,
4690                                    struct cYAML **err_rc)
4691 {
4692         struct cYAML *seq_no, *src, *rte, *dst, *prio, *idx;
4693         union lnet_udsp_action action;
4694
4695         seq_no = cYAML_get_object_item(tree, "seq_no");
4696         src = cYAML_get_object_item(tree, "src");
4697         rte = cYAML_get_object_item(tree, "rte");
4698         dst = cYAML_get_object_item(tree, "dst");
4699         prio = cYAML_get_object_item(tree, "priority");
4700         idx = cYAML_get_object_item(tree, "idx");
4701
4702         action.udsp_priority = prio ? prio->cy_valueint : -1;
4703
4704         return lustre_lnet_add_udsp(src ? src->cy_valuestring : NULL,
4705                                     dst ? dst->cy_valuestring : NULL,
4706                                     rte ? rte->cy_valuestring : NULL,
4707                                     prio ? "priority" : "",
4708                                     &action,
4709                                     idx ? idx->cy_valueint : -1,
4710                                     seq_no ? seq_no->cy_valueint : -1,
4711                                     err_rc);
4712 }
4713
4714 static int handle_yaml_show_udsp(struct cYAML *tree, struct cYAML **show_rc,
4715                                  struct cYAML **err_rc)
4716 {
4717         struct cYAML *seq_no;
4718         struct cYAML *idx;
4719
4720         seq_no = cYAML_get_object_item(tree, "seq_no");
4721         idx = cYAML_get_object_item(tree, "idx");
4722
4723         return lustre_lnet_show_udsp(idx ? idx->cy_valueint : -1,
4724                                      seq_no ? seq_no->cy_valueint : -1,
4725                                      show_rc, err_rc);
4726 }
4727
4728 static int handle_yaml_config_global_settings(struct cYAML *tree,
4729                                               struct cYAML **show_rc,
4730                                               struct cYAML **err_rc)
4731 {
4732         struct cYAML *max_intf, *numa, *discovery, *retry, *tto, *seq_no,
4733                      *sen, *recov, *rsen, *drop_asym_route, *rsp_tracking,
4734                      *recov_limit;
4735         int rc = 0;
4736
4737         seq_no = cYAML_get_object_item(tree, "seq_no");
4738         max_intf = cYAML_get_object_item(tree, "max_intf");
4739         if (max_intf)
4740                 rc = lustre_lnet_config_max_intf(max_intf->cy_valueint,
4741                                                  seq_no ? seq_no->cy_valueint
4742                                                         : -1,
4743                                                  err_rc);
4744
4745         numa = cYAML_get_object_item(tree, "numa_range");
4746         if (numa)
4747                 rc = lustre_lnet_config_numa_range(numa->cy_valueint,
4748                                                    seq_no ? seq_no->cy_valueint
4749                                                         : -1,
4750                                                    err_rc);
4751
4752         discovery = cYAML_get_object_item(tree, "discovery");
4753         if (discovery)
4754                 rc = lustre_lnet_config_discovery(discovery->cy_valueint,
4755                                                   seq_no ? seq_no->cy_valueint
4756                                                         : -1,
4757                                                   err_rc);
4758
4759         drop_asym_route = cYAML_get_object_item(tree, "drop_asym_route");
4760         if (drop_asym_route)
4761                 rc = lustre_lnet_config_drop_asym_route(
4762                         drop_asym_route->cy_valueint,
4763                         seq_no ? seq_no->cy_valueint : -1,
4764                         err_rc);
4765
4766         retry = cYAML_get_object_item(tree, "retry_count");
4767         if (retry)
4768                 rc = lustre_lnet_config_retry_count(retry->cy_valueint,
4769                                                     seq_no ? seq_no->cy_valueint
4770                                                         : -1,
4771                                                     err_rc);
4772
4773         tto = cYAML_get_object_item(tree, "transaction_timeout");
4774         if (tto)
4775                 rc = lustre_lnet_config_transaction_to(tto->cy_valueint,
4776                                                        seq_no ? seq_no->cy_valueint
4777                                                                 : -1,
4778                                                        err_rc);
4779
4780         sen = cYAML_get_object_item(tree, "health_sensitivity");
4781         if (sen)
4782                 rc = lustre_lnet_config_hsensitivity(sen->cy_valueint,
4783                                                      seq_no ? seq_no->cy_valueint
4784                                                         : -1,
4785                                                      err_rc);
4786
4787         recov = cYAML_get_object_item(tree, "recovery_interval");
4788         if (recov)
4789                 rc = lustre_lnet_config_recov_intrv(recov->cy_valueint,
4790                                                     seq_no ? seq_no->cy_valueint
4791                                                         : -1,
4792                                                     err_rc);
4793
4794         rsen = cYAML_get_object_item(tree, "router_sensitivity");
4795         if (rsen)
4796                 rc = lustre_lnet_config_rtr_sensitivity(rsen->cy_valueint,
4797                                                      seq_no ? seq_no->cy_valueint
4798                                                         : -1,
4799                                                      err_rc);
4800
4801         rsp_tracking = cYAML_get_object_item(tree, "response_tracking");
4802         if (rsp_tracking)
4803                 rc = lustre_lnet_config_response_tracking(rsp_tracking->cy_valueint,
4804                                                      seq_no ? seq_no->cy_valueint
4805                                                         : -1,
4806                                                      err_rc);
4807
4808         recov_limit = cYAML_get_object_item(tree, "recovery_limit");
4809         if (recov_limit)
4810                 rc = lustre_lnet_config_recovery_limit(recov_limit->cy_valueint,
4811                                                        seq_no ? seq_no->cy_valueint
4812                                                         : -1,
4813                                                        err_rc);
4814
4815         return rc;
4816 }
4817
4818 static int handle_yaml_del_global_settings(struct cYAML *tree,
4819                                            struct cYAML **show_rc,
4820                                            struct cYAML **err_rc)
4821 {
4822         struct cYAML *max_intf, *numa, *discovery, *seq_no, *drop_asym_route;
4823         int rc = 0;
4824
4825         seq_no = cYAML_get_object_item(tree, "seq_no");
4826         max_intf = cYAML_get_object_item(tree, "max_intf");
4827         if (max_intf)
4828                 rc = lustre_lnet_config_max_intf(LNET_INTERFACES_MAX_DEFAULT,
4829                                                  seq_no ? seq_no->cy_valueint
4830                                                         : -1,
4831                                                  err_rc);
4832
4833         numa = cYAML_get_object_item(tree, "numa_range");
4834         if (numa)
4835                 rc = lustre_lnet_config_numa_range(0,
4836                                                    seq_no ? seq_no->cy_valueint
4837                                                         : -1,
4838                                                    err_rc);
4839
4840         /* peer discovery is enabled by default */
4841         discovery = cYAML_get_object_item(tree, "discovery");
4842         if (discovery)
4843                 rc = lustre_lnet_config_discovery(1,
4844                                                   seq_no ? seq_no->cy_valueint
4845                                                         : -1,
4846                                                   err_rc);
4847
4848         /* asymmetrical route messages are accepted by default */
4849         drop_asym_route = cYAML_get_object_item(tree, "drop_asym_route");
4850         if (drop_asym_route)
4851                 rc = lustre_lnet_config_drop_asym_route(
4852                         0, seq_no ? seq_no->cy_valueint : -1, err_rc);
4853
4854         return rc;
4855 }
4856
4857 static int handle_yaml_show_global_settings(struct cYAML *tree,
4858                                             struct cYAML **show_rc,
4859                                             struct cYAML **err_rc)
4860 {
4861         struct cYAML *max_intf, *numa, *discovery, *retry, *tto, *seq_no,
4862                      *sen, *recov, *rsen, *drop_asym_route, *rsp_tracking,
4863                      *recov_limit;
4864         int rc = 0;
4865
4866         seq_no = cYAML_get_object_item(tree, "seq_no");
4867         max_intf = cYAML_get_object_item(tree, "max_intf");
4868         if (max_intf)
4869                 rc = lustre_lnet_show_max_intf(seq_no ? seq_no->cy_valueint
4870                                                         : -1,
4871                                                 show_rc, err_rc);
4872
4873         numa = cYAML_get_object_item(tree, "numa_range");
4874         if (numa)
4875                 rc = lustre_lnet_show_numa_range(seq_no ? seq_no->cy_valueint
4876                                                         : -1,
4877                                                  show_rc, err_rc);
4878
4879         discovery = cYAML_get_object_item(tree, "discovery");
4880         if (discovery)
4881                 rc = lustre_lnet_show_discovery(seq_no ? seq_no->cy_valueint
4882                                                         : -1,
4883                                                 show_rc, err_rc);
4884
4885         drop_asym_route = cYAML_get_object_item(tree, "drop_asym_route");
4886         if (drop_asym_route)
4887                 rc = lustre_lnet_show_drop_asym_route(
4888                         seq_no ? seq_no->cy_valueint : -1,
4889                         show_rc, err_rc);
4890
4891         retry = cYAML_get_object_item(tree, "retry_count");
4892         if (retry)
4893                 rc = lustre_lnet_show_retry_count(seq_no ? seq_no->cy_valueint
4894                                                         : -1,
4895                                                   show_rc, err_rc);
4896
4897         tto = cYAML_get_object_item(tree, "transaction_timeout");
4898         if (tto)
4899                 rc = lustre_lnet_show_transaction_to(seq_no ? seq_no->cy_valueint
4900                                                         : -1,
4901                                                      show_rc, err_rc);
4902
4903         sen = cYAML_get_object_item(tree, "health_sensitivity");
4904         if (sen)
4905                 rc = lustre_lnet_show_hsensitivity(seq_no ? seq_no->cy_valueint
4906                                                         : -1,
4907                                                      show_rc, err_rc);
4908
4909         recov = cYAML_get_object_item(tree, "recovery_interval");
4910         if (recov)
4911                 rc = lustre_lnet_show_recov_intrv(seq_no ? seq_no->cy_valueint
4912                                                         : -1,
4913                                                   show_rc, err_rc);
4914
4915         rsen = cYAML_get_object_item(tree, "router_sensitivity");
4916         if (rsen)
4917                 rc = lustre_lnet_show_hsensitivity(seq_no ? seq_no->cy_valueint
4918                                                         : -1,
4919                                                      show_rc, err_rc);
4920
4921         rsp_tracking = cYAML_get_object_item(tree, "response_tracking");
4922         if (rsp_tracking)
4923                 rc = lustre_lnet_show_response_tracking(seq_no ?
4924                                                         seq_no->cy_valueint :
4925                                                         -1,
4926                                                         show_rc, err_rc);
4927
4928         recov_limit = cYAML_get_object_item(tree, "recovery_limit");
4929         if (recov_limit)
4930                 rc = lustre_lnet_show_recovery_limit(seq_no ?
4931                                                      seq_no->cy_valueint :
4932                                                      -1,
4933                                                      show_rc, err_rc);
4934
4935         return rc;
4936 }
4937
4938 static int handle_yaml_ping(struct cYAML *tree, struct cYAML **show_rc,
4939                             struct cYAML **err_rc)
4940 {
4941         struct cYAML *seq_no, *nid, *timeout;
4942
4943         seq_no = cYAML_get_object_item(tree, "seq_no");
4944         nid = cYAML_get_object_item(tree, "primary nid");
4945         timeout = cYAML_get_object_item(tree, "timeout");
4946
4947         return lustre_lnet_ping_nid((nid) ? nid->cy_valuestring : NULL,
4948                                     (timeout) ? timeout->cy_valueint : 1000,
4949                                     (seq_no) ? seq_no->cy_valueint : -1,
4950                                     show_rc, err_rc);
4951 }
4952
4953 static int handle_yaml_discover(struct cYAML *tree, struct cYAML **show_rc,
4954                                 struct cYAML **err_rc)
4955 {
4956         struct cYAML *seq_no, *nid, *force;
4957
4958         seq_no = cYAML_get_object_item(tree, "seq_no");
4959         nid = cYAML_get_object_item(tree, "primary nid");
4960         force = cYAML_get_object_item(tree, "force");
4961
4962         return lustre_lnet_discover_nid((nid) ? nid->cy_valuestring : NULL,
4963                                         (force) ? force->cy_valueint : 0,
4964                                         (seq_no) ? seq_no->cy_valueint : -1,
4965                                         show_rc, err_rc);
4966 }
4967
4968 static int handle_yaml_no_op()
4969 {
4970         return LUSTRE_CFG_RC_NO_ERR;
4971 }
4972
4973 struct lookup_cmd_hdlr_tbl {
4974         char *name;
4975         cmd_handler_t cb;
4976 };
4977
4978 static struct lookup_cmd_hdlr_tbl lookup_config_tbl[] = {
4979         { .name = "route",      .cb = handle_yaml_config_route },
4980         { .name = "net",        .cb = handle_yaml_config_ni },
4981         { .name = "ip2nets",    .cb = handle_yaml_config_ip2nets },
4982         { .name = "peer",       .cb = handle_yaml_config_peer },
4983         { .name = "routing",    .cb = handle_yaml_config_routing },
4984         { .name = "buffers",    .cb = handle_yaml_config_buffers },
4985         { .name = "statistics", .cb = handle_yaml_no_op },
4986         { .name = "global",     .cb = handle_yaml_config_global_settings},
4987         { .name = "numa",       .cb = handle_yaml_config_numa },
4988         { .name = "ping",       .cb = handle_yaml_no_op },
4989         { .name = "discover",   .cb = handle_yaml_no_op },
4990         { .name = "udsp",       .cb = handle_yaml_config_udsp },
4991         { .name = NULL } };
4992
4993 static struct lookup_cmd_hdlr_tbl lookup_del_tbl[] = {
4994         { .name = "route",      .cb = handle_yaml_del_route },
4995         { .name = "net",        .cb = handle_yaml_del_ni },
4996         { .name = "ip2nets",    .cb = handle_yaml_no_op },
4997         { .name = "peer",       .cb = handle_yaml_del_peer },
4998         { .name = "routing",    .cb = handle_yaml_del_routing },
4999         { .name = "buffers",    .cb = handle_yaml_no_op },
5000         { .name = "statistics", .cb = handle_yaml_no_op },
5001         { .name = "global",     .cb = handle_yaml_del_global_settings},
5002         { .name = "numa",       .cb = handle_yaml_del_numa },
5003         { .name = "ping",       .cb = handle_yaml_no_op },
5004         { .name = "discover",   .cb = handle_yaml_no_op },
5005         { .name = "udsp",       .cb = handle_yaml_del_udsp },
5006         { .name = NULL } };
5007
5008 static struct lookup_cmd_hdlr_tbl lookup_show_tbl[] = {
5009         { .name = "route",      .cb = handle_yaml_show_route },
5010         { .name = "net",        .cb = handle_yaml_show_net },
5011         { .name = "peer",       .cb = handle_yaml_show_peers },
5012         { .name = "ip2nets",    .cb = handle_yaml_no_op },
5013         { .name = "routing",    .cb = handle_yaml_show_routing },
5014         { .name = "buffers",    .cb = handle_yaml_show_routing },
5015         { .name = "statistics", .cb = handle_yaml_show_stats },
5016         { .name = "global",     .cb = handle_yaml_show_global_settings},
5017         { .name = "numa",       .cb = handle_yaml_show_numa },
5018         { .name = "ping",       .cb = handle_yaml_no_op },
5019         { .name = "discover",   .cb = handle_yaml_no_op },
5020         { .name = "udsp",       .cb = handle_yaml_show_udsp },
5021         { .name = NULL } };
5022
5023 static struct lookup_cmd_hdlr_tbl lookup_exec_tbl[] = {
5024         { .name = "route",      .cb = handle_yaml_no_op },
5025         { .name = "net",        .cb = handle_yaml_no_op },
5026         { .name = "peer",       .cb = handle_yaml_no_op },
5027         { .name = "ip2nets",    .cb = handle_yaml_no_op },
5028         { .name = "routing",    .cb = handle_yaml_no_op },
5029         { .name = "buffers",    .cb = handle_yaml_no_op },
5030         { .name = "statistics", .cb = handle_yaml_no_op },
5031         { .name = "global",     .cb = handle_yaml_no_op },
5032         { .name = "numa",       .cb = handle_yaml_no_op },
5033         { .name = "ping",       .cb = handle_yaml_ping },
5034         { .name = "discover",   .cb = handle_yaml_discover },
5035         { .name = NULL } };
5036
5037 static cmd_handler_t lookup_fn(char *key,
5038                                struct lookup_cmd_hdlr_tbl *tbl)
5039 {
5040         int i;
5041         if (key == NULL)
5042                 return NULL;
5043
5044         for (i = 0; tbl[i].name != NULL; i++) {
5045                 if (strncmp(key, tbl[i].name, strlen(tbl[i].name)) == 0)
5046                         return tbl[i].cb;
5047         }
5048
5049         return NULL;
5050 }
5051
5052 static int lustre_yaml_cb_helper(char *f, struct lookup_cmd_hdlr_tbl *table,
5053                                  struct cYAML **show_rc, struct cYAML **err_rc)
5054 {
5055         struct cYAML *tree, *item = NULL, *head, *child;
5056         cmd_handler_t cb;
5057         char err_str[LNET_MAX_STR_LEN];
5058         int rc = LUSTRE_CFG_RC_NO_ERR, return_rc = LUSTRE_CFG_RC_NO_ERR;
5059
5060         tree = cYAML_build_tree(f, NULL, 0, err_rc, false);
5061         if (tree == NULL)
5062                 return LUSTRE_CFG_RC_BAD_PARAM;
5063
5064         child = tree->cy_child;
5065         while (child != NULL) {
5066                 cb = lookup_fn(child->cy_string, table);
5067                 if (cb == NULL) {
5068                         snprintf(err_str, sizeof(err_str),
5069                                 "\"call back for '%s' not found\"",
5070                                 child->cy_string);
5071                         cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
5072                                         "yaml", "helper", err_str, err_rc);
5073                         goto out;
5074                 }
5075
5076                 if (cYAML_is_sequence(child)) {
5077                         while ((head = cYAML_get_next_seq_item(child, &item))
5078                                != NULL) {
5079                                 rc = cb(head, show_rc, err_rc);
5080                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
5081                                         return_rc = rc;
5082                         }
5083                 } else {
5084                         rc = cb(child, show_rc, err_rc);
5085                         if (rc != LUSTRE_CFG_RC_NO_ERR)
5086                                 return_rc = rc;
5087                 }
5088                 item = NULL;
5089                 child = child->cy_next;
5090         }
5091
5092 out:
5093         cYAML_free_tree(tree);
5094
5095         return return_rc;
5096 }
5097
5098 int lustre_yaml_config(char *f, struct cYAML **err_rc)
5099 {
5100         return lustre_yaml_cb_helper(f, lookup_config_tbl,
5101                                      NULL, err_rc);
5102 }
5103
5104 int lustre_yaml_del(char *f, struct cYAML **err_rc)
5105 {
5106         return lustre_yaml_cb_helper(f, lookup_del_tbl,
5107                                      NULL, err_rc);
5108 }
5109
5110 int lustre_yaml_show(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
5111 {
5112         return lustre_yaml_cb_helper(f, lookup_show_tbl,
5113                                      show_rc, err_rc);
5114 }
5115
5116 int lustre_yaml_exec(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
5117 {
5118         return lustre_yaml_cb_helper(f, lookup_exec_tbl,
5119                                      show_rc, err_rc);
5120 }