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, "fatal_error",
2226                                                 hstats.hlni_fatal_error)
2227                                                         == NULL)
2228                                 goto out;
2229                         if (cYAML_create_number(yhstats, "health value",
2230                                                 hstats.hlni_health_value)
2231                                                         == NULL)
2232                                 goto out;
2233                         if (cYAML_create_number(yhstats, "interrupts",
2234                                                 hstats.hlni_local_interrupt)
2235                                                         == NULL)
2236                                 goto out;
2237                         if (cYAML_create_number(yhstats, "dropped",
2238                                                 hstats.hlni_local_dropped)
2239                                                         == NULL)
2240                                 goto out;
2241                         if (cYAML_create_number(yhstats, "aborted",
2242                                                 hstats.hlni_local_aborted)
2243                                                         == NULL)
2244                                 goto out;
2245                         if (cYAML_create_number(yhstats, "no route",
2246                                                 hstats.hlni_local_no_route)
2247                                                         == NULL)
2248                                 goto out;
2249                         if (cYAML_create_number(yhstats, "timeouts",
2250                                                 hstats.hlni_local_timeout)
2251                                                         == NULL)
2252                                 goto out;
2253                         if (cYAML_create_number(yhstats, "error",
2254                                                 hstats.hlni_local_error)
2255                                                         == NULL)
2256                                 goto out;
2257                         if (cYAML_create_number(yhstats, "ping_count",
2258                                                 hstats.hlni_ping_count)
2259                                                         == NULL)
2260                                 goto out;
2261                         if (cYAML_create_number(yhstats, "next_ping",
2262                                                 hstats.hlni_next_ping)
2263                                                         == NULL)
2264                                 goto out;
2265
2266 continue_without_msg_stats:
2267                         tunables = cYAML_create_object(item, "tunables");
2268                         if (!tunables)
2269                                 goto out;
2270
2271                         rc = lustre_net_show_tunables(tunables, &lnd->lt_cmn);
2272                         if (rc != LUSTRE_CFG_RC_NO_ERR)
2273                                 goto out;
2274
2275                         rc = lustre_ni_show_tunables(tunables, LNET_NETTYP(rc_net),
2276                                                      &lnd->lt_tun);
2277                         if (rc != LUSTRE_CFG_RC_NO_ERR &&
2278                             rc != LUSTRE_CFG_RC_NO_MATCH)
2279                                 goto out;
2280
2281                         if (rc != LUSTRE_CFG_RC_NO_MATCH) {
2282                                 tunables = cYAML_create_object(item,
2283                                                                "lnd tunables");
2284                                 if (tunables == NULL)
2285                                         goto out;
2286                         }
2287
2288                         if (!backup &&
2289                             cYAML_create_number(item, "dev cpt",
2290                                                 ni_data->lic_dev_cpt) == NULL)
2291                                 goto out;
2292
2293                         /* out put the CPTs in the format: "[x,x,x,...]" */
2294                         pos = str_buf;
2295                         limit = str_buf + str_buf_len - 3;
2296                         pos += scnprintf(pos, limit - pos, "\"[");
2297                         for (j = 0 ; ni_data->lic_ncpts >= 1 &&
2298                                 j < ni_data->lic_ncpts &&
2299                                 pos < limit; j++) {
2300                                 pos += scnprintf(pos, limit - pos,
2301                                                  "%d", ni_data->lic_cpts[j]);
2302                                 if ((j + 1) < ni_data->lic_ncpts)
2303                                         pos += scnprintf(pos, limit - pos, ",");
2304                         }
2305                         snprintf(pos, 3, "]\"");
2306
2307                         if (ni_data->lic_ncpts >= 1 &&
2308                             cYAML_create_string(item, "CPT",
2309                                                 str_buf) == NULL)
2310                                 goto out;
2311                 }
2312         }
2313
2314         /* Print out the net information only if show_rc is not provided */
2315         if (show_rc == NULL)
2316                 cYAML_print_tree(root);
2317
2318         if (l_errno != ENOENT) {
2319                 snprintf(err_str,
2320                          sizeof(err_str),
2321                          "\"cannot get networks: %s\"",
2322                          strerror(l_errno));
2323                 rc = -l_errno;
2324                 goto out;
2325         } else
2326                 rc = LUSTRE_CFG_RC_NO_ERR;
2327
2328         snprintf(err_str, sizeof(err_str), "\"success\"");
2329 out:
2330         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2331                 cYAML_free_tree(root);
2332         } else if (show_rc != NULL && *show_rc != NULL) {
2333                 struct cYAML *show_node;
2334                 /* find the net node, if one doesn't exist
2335                  * then insert one.  Otherwise add to the one there
2336                  */
2337                 show_node = cYAML_get_object_item(*show_rc, "net");
2338                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
2339                         cYAML_insert_child(show_node, first_seq);
2340                         free(net_node);
2341                         free(root);
2342                 } else if (show_node == NULL) {
2343                         cYAML_insert_sibling((*show_rc)->cy_child,
2344                                                 net_node);
2345                         free(root);
2346                 } else {
2347                         cYAML_free_tree(root);
2348                 }
2349         } else {
2350                 *show_rc = root;
2351         }
2352
2353         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
2354
2355         return rc;
2356 }
2357
2358 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
2359 {
2360         struct lnet_ioctl_config_data data;
2361         int rc = LUSTRE_CFG_RC_NO_ERR;
2362         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2363
2364         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2365         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
2366
2367         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
2368         if (rc != 0) {
2369                 rc = -errno;
2370                 snprintf(err_str,
2371                          sizeof(err_str),
2372                          "\"cannot %s routing %s\"",
2373                          (enable) ? "enable" : "disable", strerror(errno));
2374                 goto out;
2375         }
2376
2377 out:
2378         cYAML_build_error(rc, seq_no,
2379                          (enable) ? ADD_CMD : DEL_CMD,
2380                          "routing", err_str, err_rc);
2381
2382         return rc;
2383 }
2384
2385 int ioctl_set_value(__u32 val, int ioc, char *name,
2386                     int seq_no, struct cYAML **err_rc)
2387 {
2388         struct lnet_ioctl_set_value data;
2389         int rc = LUSTRE_CFG_RC_NO_ERR;
2390         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2391
2392         LIBCFS_IOC_INIT_V2(data, sv_hdr);
2393         data.sv_value = val;
2394
2395         rc = l_ioctl(LNET_DEV_ID, ioc , &data);
2396         if (rc != 0) {
2397                 rc = -errno;
2398                 snprintf(err_str,
2399                          sizeof(err_str),
2400                          "\"cannot configure %s to %d: %s\"", name,
2401                          val, strerror(errno));
2402         }
2403
2404         cYAML_build_error(rc, seq_no, ADD_CMD, name, err_str, err_rc);
2405
2406         return rc;
2407 }
2408
2409 int lustre_lnet_config_recov_intrv(int intrv, int seq_no, struct cYAML **err_rc)
2410 {
2411         int rc = LUSTRE_CFG_RC_NO_ERR;
2412         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2413         char val[LNET_MAX_STR_LEN];
2414
2415         snprintf(val, sizeof(val), "%d", intrv);
2416
2417         rc = write_sysfs_file(modparam_path, "lnet_recovery_interval", val,
2418                               1, strlen(val) + 1);
2419         if (rc)
2420                 snprintf(err_str, sizeof(err_str),
2421                          "\"cannot configure recovery interval: %s\"",
2422                          strerror(errno));
2423
2424         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_interval", err_str, err_rc);
2425
2426         return rc;
2427 }
2428
2429 int lustre_lnet_config_rtr_sensitivity(int sen, int seq_no, struct cYAML **err_rc)
2430 {
2431         int rc = LUSTRE_CFG_RC_NO_ERR;
2432         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2433         char val[LNET_MAX_STR_LEN];
2434
2435         snprintf(val, sizeof(val), "%d", sen);
2436
2437         rc = write_sysfs_file(modparam_path, "router_sensitivity_percentage", val,
2438                               1, strlen(val) + 1);
2439         if (rc)
2440                 snprintf(err_str, sizeof(err_str),
2441                          "\"cannot configure router health sensitivity: %s\"",
2442                          strerror(errno));
2443
2444         cYAML_build_error(rc, seq_no, ADD_CMD, "router_sensitivity", err_str, err_rc);
2445
2446         return rc;
2447 }
2448
2449 int lustre_lnet_config_hsensitivity(int sen, int seq_no, struct cYAML **err_rc)
2450 {
2451         int rc = LUSTRE_CFG_RC_NO_ERR;
2452         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2453         char val[LNET_MAX_STR_LEN];
2454
2455         snprintf(val, sizeof(val), "%d", sen);
2456
2457         rc = write_sysfs_file(modparam_path, "lnet_health_sensitivity", val,
2458                               1, strlen(val) + 1);
2459         if (rc)
2460                 snprintf(err_str, sizeof(err_str),
2461                          "\"cannot configure health sensitivity: %s\"",
2462                          strerror(errno));
2463
2464         cYAML_build_error(rc, seq_no, ADD_CMD, "health_sensitivity", err_str, err_rc);
2465
2466         return rc;
2467 }
2468
2469 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc)
2470 {
2471         int rc = LUSTRE_CFG_RC_NO_ERR;
2472         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2473         char val[LNET_MAX_STR_LEN];
2474
2475         snprintf(val, sizeof(val), "%d", timeout);
2476
2477         rc = write_sysfs_file(modparam_path, "lnet_transaction_timeout", val,
2478                               1, strlen(val) + 1);
2479         if (rc)
2480                 snprintf(err_str, sizeof(err_str),
2481                          "\"cannot configure transaction timeout: %s\"",
2482                          strerror(errno));
2483
2484         cYAML_build_error(rc, seq_no, ADD_CMD, "transaction_timeout", err_str, err_rc);
2485
2486         return rc;
2487 }
2488
2489 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc)
2490 {
2491         int rc = LUSTRE_CFG_RC_NO_ERR;
2492         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2493         char val[LNET_MAX_STR_LEN];
2494
2495         snprintf(val, sizeof(val), "%d", count);
2496
2497         rc = write_sysfs_file(modparam_path, "lnet_retry_count", val,
2498                               1, strlen(val) + 1);
2499         if (rc)
2500                 snprintf(err_str, sizeof(err_str),
2501                          "\"cannot configure retry count: %s\"",
2502                          strerror(errno));
2503
2504         cYAML_build_error(rc, seq_no, ADD_CMD, "retry_count", err_str, err_rc);
2505
2506         return rc;
2507 }
2508
2509 int lustre_lnet_config_response_tracking(int val, int seq_no,
2510                                          struct cYAML **err_rc)
2511 {
2512         int rc = LUSTRE_CFG_RC_NO_ERR;
2513         char err_str[LNET_MAX_STR_LEN];
2514         char val_str[LNET_MAX_STR_LEN];
2515
2516         if (val < 0 || val > 3) {
2517                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2518                 snprintf(err_str, sizeof(err_str),
2519                          "\"Valid values are: 0, 1, 2, or 3\"");
2520         } else {
2521                 snprintf(err_str, sizeof(err_str), "\"success\"");
2522
2523                 snprintf(val_str, sizeof(val_str), "%d", val);
2524
2525                 rc = write_sysfs_file(modparam_path, "lnet_response_tracking",
2526                                       val_str, 1, strlen(val_str) + 1);
2527                 if (rc)
2528                         snprintf(err_str, sizeof(err_str),
2529                                  "\"cannot configure response tracking: %s\"",
2530                                  strerror(errno));
2531         }
2532
2533         cYAML_build_error(rc, seq_no, ADD_CMD, "response_tracking", err_str,
2534                           err_rc);
2535
2536         return rc;
2537 }
2538
2539 int lustre_lnet_config_recovery_limit(int val, int seq_no,
2540                                       struct cYAML **err_rc)
2541 {
2542         int rc = LUSTRE_CFG_RC_NO_ERR;
2543         char err_str[LNET_MAX_STR_LEN];
2544         char val_str[LNET_MAX_STR_LEN];
2545
2546         if (val < 0) {
2547                 rc = LUSTRE_CFG_RC_BAD_PARAM;
2548                 snprintf(err_str, sizeof(err_str),
2549                          "\"Must be greater than or equal to 0\"");
2550         } else {
2551                 snprintf(err_str, sizeof(err_str), "\"success\"");
2552
2553                 snprintf(val_str, sizeof(val_str), "%d", val);
2554
2555                 rc = write_sysfs_file(modparam_path, "lnet_recovery_limit",
2556                                       val_str, 1, strlen(val_str) + 1);
2557                 if (rc)
2558                         snprintf(err_str, sizeof(err_str),
2559                                  "\"cannot configure recovery limit: %s\"",
2560                                  strerror(errno));
2561         }
2562
2563         cYAML_build_error(rc, seq_no, ADD_CMD, "recovery_limit", err_str,
2564                           err_rc);
2565
2566         return rc;
2567 }
2568
2569 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc)
2570 {
2571         int rc = LUSTRE_CFG_RC_NO_ERR;
2572         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2573         char val[LNET_MAX_STR_LEN];
2574
2575         snprintf(val, sizeof(val), "%d", max);
2576
2577         rc = write_sysfs_file(modparam_path, "lnet_interfaces_max", val,
2578                               1, strlen(val) + 1);
2579         if (rc)
2580                 snprintf(err_str, sizeof(err_str),
2581                          "\"cannot configure max interfaces: %s\"",
2582                          strerror(errno));
2583
2584         cYAML_build_error(rc, seq_no, ADD_CMD, "max_interfaces", err_str, err_rc);
2585
2586         return rc;
2587 }
2588
2589 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc)
2590 {
2591         int rc = LUSTRE_CFG_RC_NO_ERR;
2592         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2593         char val[LNET_MAX_STR_LEN];
2594
2595         snprintf(val, sizeof(val), "%u", (enable) ? 0 : 1);
2596
2597         rc = write_sysfs_file(modparam_path, "lnet_peer_discovery_disabled", val,
2598                               1, strlen(val) + 1);
2599         if (rc)
2600                 snprintf(err_str, sizeof(err_str),
2601                          "\"cannot configure discovery: %s\"",
2602                          strerror(errno));
2603
2604         cYAML_build_error(rc, seq_no, ADD_CMD, "discovery", err_str, err_rc);
2605
2606         return rc;
2607
2608 }
2609
2610 int lustre_lnet_config_drop_asym_route(int drop, int seq_no,
2611                                        struct cYAML **err_rc)
2612 {
2613         int rc = LUSTRE_CFG_RC_NO_ERR;
2614         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2615         char val[LNET_MAX_STR_LEN];
2616
2617         snprintf(val, sizeof(val), "%u", (drop) ? 1 : 0);
2618
2619         rc = write_sysfs_file(modparam_path, "lnet_drop_asym_route", val,
2620                               1, strlen(val) + 1);
2621         if (rc)
2622                 snprintf(err_str, sizeof(err_str),
2623                          "\"cannot configure drop asym route: %s\"",
2624                          strerror(errno));
2625
2626         cYAML_build_error(rc, seq_no, ADD_CMD, "drop_asym_route",
2627                           err_str, err_rc);
2628
2629         return rc;
2630
2631 }
2632
2633 int lustre_lnet_config_numa_range(int range, int seq_no, struct cYAML **err_rc)
2634 {
2635         return ioctl_set_value(range, IOC_LIBCFS_SET_NUMA_RANGE,
2636                                "numa_range", seq_no, err_rc);
2637 }
2638
2639 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
2640                                struct cYAML **err_rc)
2641 {
2642         struct lnet_ioctl_config_data data;
2643         int rc = LUSTRE_CFG_RC_NO_ERR;
2644         char err_str[LNET_MAX_STR_LEN] = "\"success\"";
2645
2646         /* -1 indicates to ignore changes to this field */
2647         if (tiny < -1 || small < -1 || large < -1) {
2648                 snprintf(err_str,
2649                          sizeof(err_str),
2650                          "\"tiny, small and large must be >= 0\"");
2651                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
2652                 goto out;
2653         }
2654
2655         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
2656         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
2657         data.cfg_config_u.cfg_buffers.buf_small = small;
2658         data.cfg_config_u.cfg_buffers.buf_large = large;
2659
2660         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
2661         if (rc != 0) {
2662                 rc = -errno;
2663                 snprintf(err_str,
2664                          sizeof(err_str),
2665                          "\"cannot configure buffers: %s\"", strerror(errno));
2666                 goto out;
2667         }
2668
2669 out:
2670         cYAML_build_error(rc, seq_no, ADD_CMD, "buf", err_str, err_rc);
2671
2672         return rc;
2673 }
2674
2675 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
2676                              struct cYAML **err_rc, bool backup)
2677 {
2678         struct lnet_ioctl_config_data *data;
2679         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
2680         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2681         int l_errno = 0;
2682         char *buf;
2683         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
2684         int buf_count[LNET_NRBPOOLS] = {0};
2685         struct cYAML *root = NULL, *pools_node = NULL,
2686                      *type_node = NULL, *item = NULL, *cpt = NULL,
2687                      *first_seq = NULL, *buffers = NULL;
2688         int i, j;
2689         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2690         char node_name[LNET_MAX_STR_LEN];
2691         bool exist = false;
2692
2693         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
2694         if (buf == NULL)
2695                 goto out;
2696
2697         data = (struct lnet_ioctl_config_data *)buf;
2698
2699         root = cYAML_create_object(NULL, NULL);
2700         if (root == NULL)
2701                 goto out;
2702
2703         if (backup)
2704                 pools_node = cYAML_create_object(root, "routing");
2705         else
2706                 pools_node = cYAML_create_seq(root, "routing");
2707         if (pools_node == NULL)
2708                 goto out;
2709
2710         for (i = 0;; i++) {
2711                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
2712                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
2713                                         sizeof(struct lnet_ioctl_pool_cfg);
2714                 data->cfg_count = i;
2715
2716                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
2717                 if (rc != 0) {
2718                         l_errno = errno;
2719                         break;
2720                 }
2721
2722                 exist = true;
2723
2724                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
2725
2726                 if (backup)
2727                         goto calculate_buffers;
2728
2729                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
2730                 item = cYAML_create_seq_item(pools_node);
2731                 if (item == NULL)
2732                         goto out;
2733
2734                 if (first_seq == NULL)
2735                         first_seq = item;
2736
2737                 cpt = cYAML_create_object(item, node_name);
2738                 if (cpt == NULL)
2739                         goto out;
2740
2741 calculate_buffers:
2742                 /* create the tree  and print */
2743                 for (j = 0; j < LNET_NRBPOOLS; j++) {
2744                         if (!backup) {
2745                                 type_node = cYAML_create_object(cpt, pools[j]);
2746                                 if (type_node == NULL)
2747                                         goto out;
2748                         }
2749                         if (!backup &&
2750                             cYAML_create_number(type_node, "npages",
2751                                                 pool_cfg->pl_pools[j].pl_npages)
2752                             == NULL)
2753                                 goto out;
2754                         if (!backup &&
2755                             cYAML_create_number(type_node, "nbuffers",
2756                                                 pool_cfg->pl_pools[j].
2757                                                   pl_nbuffers) == NULL)
2758                                 goto out;
2759                         if (!backup &&
2760                             cYAML_create_number(type_node, "credits",
2761                                                 pool_cfg->pl_pools[j].
2762                                                    pl_credits) == NULL)
2763                                 goto out;
2764                         if (!backup &&
2765                             cYAML_create_number(type_node, "mincredits",
2766                                                 pool_cfg->pl_pools[j].
2767                                                    pl_mincredits) == NULL)
2768                                 goto out;
2769                         /* keep track of the total count for each of the
2770                          * tiny, small and large buffers */
2771                         buf_count[j] += pool_cfg->pl_pools[j].pl_nbuffers;
2772                 }
2773         }
2774
2775         if (pool_cfg != NULL) {
2776                 if (backup) {
2777                         if (cYAML_create_number(pools_node, "enable",
2778                                                 pool_cfg->pl_routing) ==
2779                         NULL)
2780                                 goto out;
2781
2782                         goto add_buffer_section;
2783                 }
2784
2785                 item = cYAML_create_seq_item(pools_node);
2786                 if (item == NULL)
2787                         goto out;
2788
2789                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
2790                     NULL)
2791                         goto out;
2792         }
2793
2794 add_buffer_section:
2795         /* create a buffers entry in the show. This is necessary so that
2796          * if the YAML output is used to configure a node, the buffer
2797          * configuration takes hold */
2798         buffers = cYAML_create_object(root, "buffers");
2799         if (buffers == NULL)
2800                 goto out;
2801
2802         for (i = 0; i < LNET_NRBPOOLS; i++) {
2803                 if (cYAML_create_number(buffers, pools[i], buf_count[i]) == NULL)
2804                         goto out;
2805         }
2806
2807         if (show_rc == NULL)
2808                 cYAML_print_tree(root);
2809
2810         if (l_errno != ENOENT) {
2811                 snprintf(err_str,
2812                          sizeof(err_str),
2813                          "\"cannot get routing information: %s\"",
2814                          strerror(l_errno));
2815                 rc = -l_errno;
2816                 goto out;
2817         } else
2818                 rc = LUSTRE_CFG_RC_NO_ERR;
2819
2820         snprintf(err_str, sizeof(err_str), "\"success\"");
2821         rc = LUSTRE_CFG_RC_NO_ERR;
2822
2823 out:
2824         free(buf);
2825         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
2826                 cYAML_free_tree(root);
2827         } else if (show_rc != NULL && *show_rc != NULL) {
2828                 struct cYAML *routing_node;
2829                 /* there should exist only one routing block and one
2830                  * buffers block. If there already exists a previous one
2831                  * then don't add another */
2832                 routing_node = cYAML_get_object_item(*show_rc, "routing");
2833                 if (routing_node == NULL) {
2834                         cYAML_insert_sibling((*show_rc)->cy_child,
2835                                                 root->cy_child);
2836                         free(root);
2837                 } else {
2838                         cYAML_free_tree(root);
2839                 }
2840         } else {
2841                 *show_rc = root;
2842         }
2843
2844         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
2845
2846         return rc;
2847 }
2848
2849 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
2850                           struct cYAML **show_rc, struct cYAML **err_rc,
2851                           bool backup)
2852 {
2853         /*
2854          * TODO: This function is changing in a future patch to accommodate
2855          * PEER_LIST and proper filtering on any nid of the peer
2856          */
2857         struct lnet_ioctl_peer_cfg peer_info;
2858         struct lnet_peer_ni_credit_info *lpni_cri;
2859         struct lnet_ioctl_element_stats *lpni_stats;
2860         struct lnet_ioctl_element_msg_stats *msg_stats;
2861         struct lnet_ioctl_peer_ni_hstats *hstats;
2862         struct lnet_ioctl_construct_udsp_info udsp_info;
2863         lnet_nid_t *nidp;
2864         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
2865         int i, j, k;
2866         int l_errno = 0;
2867         __u32 count;
2868         __u32 size;
2869         struct cYAML *root = NULL, *peer = NULL, *peer_ni = NULL,
2870                      *first_seq = NULL, *peer_root = NULL, *tmp = NULL,
2871                      *msg_statistics = NULL, *statistics = NULL,
2872                      *yhstats;
2873         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
2874         struct lnet_process_id *list = NULL;
2875         void *data = NULL;
2876         void *lpni_data;
2877         bool exist = false;
2878
2879         /* create struct cYAML root object */
2880         root = cYAML_create_object(NULL, NULL);
2881         if (root == NULL)
2882                 goto out;
2883
2884         peer_root = cYAML_create_seq(root, "peer");
2885         if (peer_root == NULL)
2886                 goto out;
2887
2888         count = 1000;
2889         size = count * sizeof(struct lnet_process_id);
2890         list = malloc(size);
2891         if (list == NULL) {
2892                 l_errno = ENOMEM;
2893                 goto out;
2894         }
2895         if (knid != NULL) {
2896                 list[0].nid = libcfs_str2nid(knid);
2897                 count = 1;
2898         } else {
2899                 for (;;) {
2900                         memset(&peer_info, 0, sizeof(peer_info));
2901                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2902                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2903                         peer_info.prcfg_size = size;
2904                         peer_info.prcfg_bulk = list;
2905
2906                         l_errno = 0;
2907                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST,
2908                                      &peer_info);
2909                         count = peer_info.prcfg_count;
2910                         if (rc == 0)
2911                                 break;
2912                         l_errno = errno;
2913                         if (l_errno != E2BIG) {
2914                                 snprintf(err_str,
2915                                         sizeof(err_str),
2916                                         "\"cannot get peer list: %s\"",
2917                                         strerror(l_errno));
2918                                 rc = -l_errno;
2919                                 goto out;
2920                         }
2921                         free(list);
2922                         size = peer_info.prcfg_size;
2923                         list = malloc(size);
2924                         if (list == NULL) {
2925                                 l_errno = ENOMEM;
2926                                 goto out;
2927                         }
2928                 }
2929         }
2930
2931         size = 4096;
2932         data = malloc(size);
2933         if (data == NULL) {
2934                 l_errno = ENOMEM;
2935                 goto out;
2936         }
2937
2938         for (i = 0; i < count; i++) {
2939                 for (;;) {
2940                         memset(&peer_info, 0, sizeof(peer_info));
2941                         LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
2942                         peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
2943                         peer_info.prcfg_prim_nid = list[i].nid;
2944                         peer_info.prcfg_size = size;
2945                         peer_info.prcfg_bulk = data;
2946
2947                         l_errno = 0;
2948                         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_NI,
2949                                      &peer_info);
2950                         if (rc == 0)
2951                                 break;
2952                         l_errno = errno;
2953                         if (l_errno != E2BIG) {
2954                                 snprintf(err_str,
2955                                         sizeof(err_str),
2956                                         "\"cannot get peer information: %s\"",
2957                                         strerror(l_errno));
2958                                 rc = -l_errno;
2959                                 goto out;
2960                         }
2961                         free(data);
2962                         size = peer_info.prcfg_size;
2963                         data = malloc(size);
2964                         if (data == NULL) {
2965                                 l_errno = ENOMEM;
2966                                 goto out;
2967                         }
2968                 }
2969                 exist = true;
2970
2971                 peer = cYAML_create_seq_item(peer_root);
2972                 if (peer == NULL)
2973                         goto out;
2974
2975                 if (first_seq == NULL)
2976                         first_seq = peer;
2977
2978                 lnet_nid_t pnid = peer_info.prcfg_prim_nid;
2979                 if (cYAML_create_string(peer, "primary nid",
2980                                         libcfs_nid2str(pnid))
2981                     == NULL)
2982                         goto out;
2983                 if (cYAML_create_string(peer, "Multi-Rail",
2984                                         peer_info.prcfg_mr ? "True" : "False")
2985                     == NULL)
2986                         goto out;
2987                 /*
2988                  * print out the state of the peer only if details are
2989                  * requested
2990                  */
2991                 if (detail >= 3) {
2992                         if (!backup &&
2993                             cYAML_create_number(peer, "peer state",
2994                                                 peer_info.prcfg_state)
2995                                 == NULL)
2996                                 goto out;
2997                 }
2998
2999                 tmp = cYAML_create_seq(peer, "peer ni");
3000                 if (tmp == NULL)
3001                         goto out;
3002
3003                 lpni_data = data;
3004                 for (j = 0; j < peer_info.prcfg_count; j++) {
3005                         nidp = lpni_data;
3006                         lpni_cri = (void*)nidp + sizeof(nidp);
3007                         lpni_stats = (void *)lpni_cri + sizeof(*lpni_cri);
3008                         msg_stats = (void *)lpni_stats + sizeof(*lpni_stats);
3009                         hstats = (void *)msg_stats + sizeof(*msg_stats);
3010                         lpni_data = (void *)hstats + sizeof(*hstats);
3011
3012                         peer_ni = cYAML_create_seq_item(tmp);
3013                         if (peer_ni == NULL)
3014                                 goto out;
3015
3016                         if (cYAML_create_string(peer_ni, "nid",
3017                                                 libcfs_nid2str(*nidp))
3018                             == NULL)
3019                                 goto out;
3020
3021                         if (backup)
3022                                 continue;
3023
3024                         if (detail < 4)
3025                                 goto continue_without_udsp_info;
3026
3027                         LIBCFS_IOC_INIT_V2(udsp_info, cud_hdr);
3028                         udsp_info.cud_nid = *nidp;
3029                         udsp_info.cud_peer = true;
3030                         rc = l_ioctl(LNET_DEV_ID,
3031                                         IOC_LIBCFS_GET_CONST_UDSP_INFO,
3032                                         &udsp_info);
3033                         if (rc != 0) {
3034                                 l_errno = errno;
3035                                 goto continue_without_udsp_info;
3036                         }
3037
3038                         rc = create_remote_udsp_info(&udsp_info, peer_ni);
3039                         if (rc) {
3040                                 l_errno = errno;
3041                                 goto out;
3042                         }
3043
3044 continue_without_udsp_info:
3045                         if (cYAML_create_string(peer_ni, "state",
3046                                                 lpni_cri->cr_aliveness)
3047                             == NULL)
3048                                 goto out;
3049
3050                         if (!detail)
3051                                 continue;
3052
3053                         if (cYAML_create_number(peer_ni, "max_ni_tx_credits",
3054                                                 lpni_cri->cr_ni_peer_tx_credits)
3055                             == NULL)
3056                                 goto out;
3057
3058                         if (cYAML_create_number(peer_ni, "available_tx_credits",
3059                                                 lpni_cri->cr_peer_tx_credits)
3060                             == NULL)
3061                                 goto out;
3062
3063                         if (cYAML_create_number(peer_ni, "min_tx_credits",
3064                                                 lpni_cri->cr_peer_min_tx_credits)
3065                             == NULL)
3066                                 goto out;
3067
3068                         if (cYAML_create_number(peer_ni, "tx_q_num_of_buf",
3069                                                 lpni_cri->cr_peer_tx_qnob)
3070                             == NULL)
3071                                 goto out;
3072
3073                         if (cYAML_create_number(peer_ni, "available_rtr_credits",
3074                                                 lpni_cri->cr_peer_rtr_credits)
3075                             == NULL)
3076                                 goto out;
3077
3078                         if (cYAML_create_number(peer_ni, "min_rtr_credits",
3079                                                 lpni_cri->cr_peer_min_rtr_credits)
3080                             == NULL)
3081                                 goto out;
3082
3083                         if (cYAML_create_number(peer_ni, "refcount",
3084                                                 lpni_cri->cr_refcount) == NULL)
3085                                 goto out;
3086
3087                         statistics = cYAML_create_object(peer_ni, "statistics");
3088                         if (statistics == NULL)
3089                                 goto out;
3090
3091                         if (cYAML_create_number(statistics, "send_count",
3092                                                 lpni_stats->iel_send_count)
3093                             == NULL)
3094                                 goto out;
3095
3096                         if (cYAML_create_number(statistics, "recv_count",
3097                                                 lpni_stats->iel_recv_count)
3098                             == NULL)
3099                                 goto out;
3100
3101                         if (cYAML_create_number(statistics, "drop_count",
3102                                                 lpni_stats->iel_drop_count)
3103                             == NULL)
3104                                 goto out;
3105
3106                         if (detail < 2)
3107                                 continue;
3108
3109                         for (k = 0; k < 3; k++) {
3110                                 struct lnet_ioctl_comm_count *counts;
3111
3112                                 msg_statistics = cYAML_create_object(peer_ni,
3113                                                  (char *) gmsg_stat_names[k]);
3114                                 if (msg_statistics == NULL)
3115                                         goto out;
3116
3117                                 counts = get_counts(msg_stats, k);
3118                                 if (counts == NULL)
3119                                         goto out;
3120
3121                                 if (!add_msg_stats_to_yaml_blk(msg_statistics,
3122                                                                counts))
3123                                         goto out;
3124                         }
3125
3126                         yhstats = cYAML_create_object(peer_ni, "health stats");
3127                         if (!yhstats)
3128                                 goto out;
3129                         if (cYAML_create_number(yhstats, "health value",
3130                                                 hstats->hlpni_health_value)
3131                                                         == NULL)
3132                                 goto out;
3133                         if (cYAML_create_number(yhstats, "dropped",
3134                                                 hstats->hlpni_remote_dropped)
3135                                                         == NULL)
3136                                 goto out;
3137                         if (cYAML_create_number(yhstats, "timeout",
3138                                                 hstats->hlpni_remote_timeout)
3139                                                         == NULL)
3140                                 goto out;
3141                         if (cYAML_create_number(yhstats, "error",
3142                                                 hstats->hlpni_remote_error)
3143                                                         == NULL)
3144                                 goto out;
3145                         if (cYAML_create_number(yhstats, "network timeout",
3146                                                 hstats->hlpni_network_timeout)
3147                                                         == NULL)
3148                                 goto out;
3149                         if (cYAML_create_number(yhstats, "ping_count",
3150                                                 hstats->hlpni_ping_count)
3151                                                         == NULL)
3152                                 goto out;
3153
3154                         if (cYAML_create_number(yhstats, "next_ping",
3155                                                 hstats->hlpni_next_ping)
3156                                                         == NULL)
3157                                 goto out;
3158
3159                 }
3160         }
3161
3162         /* print output iff show_rc is not provided */
3163         if (show_rc == NULL)
3164                 cYAML_print_tree(root);
3165
3166         snprintf(err_str, sizeof(err_str), "\"success\"");
3167         rc = LUSTRE_CFG_RC_NO_ERR;
3168
3169 out:
3170         free(list);
3171         free(data);
3172         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
3173                 cYAML_free_tree(root);
3174         } else if (show_rc != NULL && *show_rc != NULL) {
3175                 struct cYAML *show_node;
3176                 /* find the peer node, if one doesn't exist then
3177                  * insert one.  Otherwise add to the one there
3178                  */
3179                 show_node = cYAML_get_object_item(*show_rc,
3180                                                   "peer");
3181                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3182                         cYAML_insert_child(show_node, first_seq);
3183                         free(peer_root);
3184                         free(root);
3185                 } else if (show_node == NULL) {
3186                         cYAML_insert_sibling((*show_rc)->cy_child,
3187                                              peer_root);
3188                         free(root);
3189                 } else {
3190                         cYAML_free_tree(root);
3191                 }
3192         } else {
3193                 *show_rc = root;
3194         }
3195
3196         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3197                           err_rc);
3198
3199         return rc;
3200 }
3201
3202 int lustre_lnet_list_peer(int seq_no,
3203                           struct cYAML **show_rc, struct cYAML **err_rc)
3204 {
3205         struct lnet_ioctl_peer_cfg peer_info;
3206         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3207         __u32 count;
3208         __u32 size;
3209         int i = 0;
3210         int l_errno = 0;
3211         struct cYAML *root = NULL, *list_root = NULL, *first_seq = NULL;
3212         char err_str[LNET_MAX_STR_LEN] = "\"out of memory\"";
3213         struct lnet_process_id *list = NULL;
3214
3215         memset(&peer_info, 0, sizeof(peer_info));
3216
3217         /* create struct cYAML root object */
3218         root = cYAML_create_object(NULL, NULL);
3219         if (root == NULL)
3220                 goto out;
3221
3222         list_root = cYAML_create_seq(root, "peer list");
3223         if (list_root == NULL)
3224                 goto out;
3225
3226         count = 1000;
3227         size = count * sizeof(struct lnet_process_id);
3228         list = malloc(size);
3229         if (list == NULL) {
3230                 l_errno = ENOMEM;
3231                 goto out;
3232         }
3233         for (;;) {
3234                 LIBCFS_IOC_INIT_V2(peer_info, prcfg_hdr);
3235                 peer_info.prcfg_hdr.ioc_len = sizeof(peer_info);
3236                 peer_info.prcfg_size = size;
3237                 peer_info.prcfg_bulk = list;
3238
3239                 l_errno = 0;
3240                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_PEER_LIST, &peer_info);
3241                 count = peer_info.prcfg_count;
3242                 if (rc == 0)
3243                         break;
3244                 l_errno = errno;
3245                 if (l_errno != E2BIG) {
3246                         snprintf(err_str,
3247                                 sizeof(err_str),
3248                                 "\"cannot get peer list: %s\"",
3249                                 strerror(l_errno));
3250                         rc = -l_errno;
3251                         goto out;
3252                 }
3253                 free(list);
3254                 size = peer_info.prcfg_size;
3255                 list = malloc(size);
3256                 if (list == NULL) {
3257                         l_errno = ENOMEM;
3258                         goto out;
3259                 }
3260         }
3261
3262         /* count is now the actual number of ids in the list. */
3263         for (i = 0; i < count; i++) {
3264                 if (cYAML_create_string(list_root, "nid",
3265                                         libcfs_nid2str(list[i].nid))
3266                     == NULL)
3267                         goto out;
3268         }
3269
3270         /* print output iff show_rc is not provided */
3271         if (show_rc == NULL)
3272                 cYAML_print_tree(root);
3273
3274         snprintf(err_str, sizeof(err_str), "\"success\"");
3275         rc = LUSTRE_CFG_RC_NO_ERR;
3276
3277 out:
3278         if (list != NULL)
3279                 free(list);
3280         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
3281                 cYAML_free_tree(root);
3282         } else if (show_rc != NULL && *show_rc != NULL) {
3283                 struct cYAML *show_node;
3284                 /* find the peer node, if one doesn't exist then
3285                  * insert one.  Otherwise add to the one there
3286                  */
3287                 show_node = cYAML_get_object_item(*show_rc,
3288                                                   "peer");
3289                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
3290                         cYAML_insert_child(show_node, first_seq);
3291                         free(list_root);
3292                         free(root);
3293                 } else if (show_node == NULL) {
3294                         cYAML_insert_sibling((*show_rc)->cy_child,
3295                                              list_root);
3296                         free(root);
3297                 } else {
3298                         cYAML_free_tree(root);
3299                 }
3300         } else {
3301                 *show_rc = root;
3302         }
3303
3304         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer", err_str,
3305                           err_rc);
3306
3307         return rc;
3308 }
3309
3310 static void add_to_global(struct cYAML *show_rc, struct cYAML *node,
3311                           struct cYAML *root)
3312 {
3313         struct cYAML *show_node;
3314
3315         show_node = cYAML_get_object_item(show_rc, "global");
3316         if (show_node != NULL)
3317                 cYAML_insert_sibling(show_node->cy_child,
3318                                      node->cy_child);
3319         else
3320                 cYAML_insert_sibling(show_rc->cy_child,
3321                                      node);
3322         free(root);
3323 }
3324
3325 static int build_global_yaml_entry(char *err_str, int err_len, int seq_no,
3326                                    char *name, __u64 value,
3327                                    struct cYAML **show_rc,
3328                                    struct cYAML **err_rc, int err)
3329 {
3330         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
3331         struct cYAML *root = NULL, *global = NULL;
3332
3333         if (err) {
3334                 rc = err;
3335                 goto out;
3336         }
3337
3338         root = cYAML_create_object(NULL, NULL);
3339         if (root == NULL)
3340                 goto out;
3341
3342         global = cYAML_create_object(root, "global");
3343         if (global == NULL)
3344                 goto out;
3345
3346         if (cYAML_create_number(global, name,
3347                                 value) == NULL)
3348                 goto out;
3349
3350         if (show_rc == NULL)
3351                 cYAML_print_tree(root);
3352
3353         snprintf(err_str, err_len, "\"success\"");
3354
3355         rc = LUSTRE_CFG_RC_NO_ERR;
3356