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) 2013, 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 <stdio.h>
  37 #include <stdlib.h>
  38 #include <libcfs/libcfsutil.h>
  39 #include <lnet/lnetctl.h>
  40 #include <lnet/socklnd.h>
  41 #include <lnet/lib-dlc.h>
  42 #include <lnet/nidstr.h>
  43 #include "liblnetconfig.h"
  44 #include "cyaml.h"
  45
  46 #define CONFIG_CMD              "configure"
  47 #define UNCONFIG_CMD            "unconfigure"
  48 #define ADD_CMD                 "add"
  49 #define DEL_CMD                 "del"
  50 #define SHOW_CMD                "show"
  51
  52 int lustre_lnet_config_lib_init(void)
  53 {
  54         return register_ioc_dev(LNET_DEV_ID, LNET_DEV_PATH,
  55                                 LNET_DEV_MAJOR, LNET_DEV_MINOR);
  56 }
  57
  58 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
  59                                  int seq_no, struct cYAML **err_rc)
  60 {
  61         struct libcfs_ioctl_data data;
  62         unsigned int opc;
  63         int rc;
  64         char err_str[LNET_MAX_STR_LEN];
  65
  66         snprintf(err_str, sizeof(err_str), "\"Success\"");
  67
  68         LIBCFS_IOC_INIT(data);
  69
  70         /* Reverse logic is used here in order not to change
  71          * the lctl utility */
  72         data.ioc_flags = load_ni_from_mod ? 0 : 1;
  73
  74         opc = up ? IOC_LIBCFS_CONFIGURE : IOC_LIBCFS_UNCONFIGURE;
  75
  76         rc = l_ioctl(LNET_DEV_ID, opc, &data);
  77
  78         if (rc != 0) {
  79                 snprintf(err_str,
  80                         sizeof(err_str),
  81                         "\"LNet %s error: %s\"", (up) ? "configure" :
  82                         "unconfigure", strerror(errno));
  83                 rc = -errno;
  84         }
  85
  86         cYAML_build_error(rc, seq_no, (up) ? CONFIG_CMD : UNCONFIG_CMD,
  87                           "lnet", err_str, err_rc);
  88
  89         return rc;
  90 }
  91
  92 int lustre_lnet_config_route(char *nw, char *gw, int hops, int prio,
  93                              int seq_no, struct cYAML **err_rc)
  94 {
  95         struct lnet_ioctl_config_data data;
  96         lnet_nid_t gateway_nid;
  97         int rc = LUSTRE_CFG_RC_NO_ERR;
  98         __u32 net = LNET_NIDNET(LNET_NID_ANY);
  99         char err_str[LNET_MAX_STR_LEN];
 100
 101         snprintf(err_str, sizeof(err_str), "\"Success\"");
 102
 103         if (nw == NULL || gw == NULL) {
 104                 snprintf(err_str,
 105                          sizeof(err_str),
 106                          "\"missing mandatory parameter(s): '%s'\"",
 107                          (nw == NULL && gw == NULL) ? "network, gateway" :
 108                          (nw == NULL) ? "network" : "gateway");
 109                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 110                 goto out;
 111         }
 112
 113         net = libcfs_str2net(nw);
 114         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 115                 snprintf(err_str,
 116                          sizeof(err_str),
 117                          "\"cannot parse net %s\"", nw);
 118                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 119                 goto out;
 120         }
 121
 122         if (LNET_NETTYP(net) == CIBLND    ||
 123             LNET_NETTYP(net) == OPENIBLND ||
 124             LNET_NETTYP(net) == IIBLND    ||
 125             LNET_NETTYP(net) == VIBLND) {
 126                 snprintf(err_str,
 127                          sizeof(err_str),
 128                          "\"obselete LNet type '%s'\"", libcfs_lnd2str(net));
 129                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 130                 goto out;
 131         }
 132
 133         gateway_nid = libcfs_str2nid(gw);
 134         if (gateway_nid == LNET_NID_ANY) {
 135                 snprintf(err_str,
 136                         sizeof(err_str),
 137                         "\"cannot parse gateway NID '%s'\"", gw);
 138                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 139                 goto out;
 140         }
 141
 142         if (hops == -1) {
 143                 /* -1 indicates to use the default hop value */
 144                 hops = 1;
 145         } else if (hops < 1 || hops > 255) {
 146                 snprintf(err_str,
 147                         sizeof(err_str),
 148                         "\"invalid hop count %d, must be between 0 and 256\"",
 149                         hops);
 150                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 151                 goto out;
 152         }
 153
 154         if (prio == -1) {
 155                 prio = 0;
 156         } else if (prio < 0) {
 157                 snprintf(err_str,
 158                          sizeof(err_str),
 159                         "\"invalid priority %d, must be greater than 0\"",
 160                         prio);
 161                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 162                 goto out;
 163         }
 164
 165         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 166         data.cfg_net = net;
 167         data.cfg_config_u.cfg_route.rtr_hop = hops;
 168         data.cfg_config_u.cfg_route.rtr_priority = prio;
 169         data.cfg_nid = gateway_nid;
 170
 171         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_ROUTE, &data);
 172         if (rc != 0) {
 173                 snprintf(err_str,
 174                          sizeof(err_str),
 175                          "\"cannot add route: %s\"", strerror(errno));
 176                 rc = -errno;
 177                 goto out;
 178         }
 179
 180 out:
 181         cYAML_build_error(rc, seq_no, ADD_CMD, "route", err_str, err_rc);
 182
 183         return rc;
 184 }
 185
 186 int lustre_lnet_del_route(char *nw, char *gw,
 187                           int seq_no, struct cYAML **err_rc)
 188 {
 189         struct lnet_ioctl_config_data data;
 190         lnet_nid_t gateway_nid;
 191         int rc = LUSTRE_CFG_RC_NO_ERR;
 192         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 193         char err_str[LNET_MAX_STR_LEN];
 194
 195         snprintf(err_str, sizeof(err_str), "\"Success\"");
 196
 197         if (nw == NULL || gw == NULL) {
 198                 snprintf(err_str,
 199                          sizeof(err_str),
 200                          "\"missing mandatory parameter(s): '%s'\"",
 201                          (nw == NULL && gw == NULL) ? "network, gateway" :
 202                          (nw == NULL) ? "network" : "gateway");
 203                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 204                 goto out;
 205         }
 206
 207         net = libcfs_str2net(nw);
 208         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 209                 snprintf(err_str,
 210                          sizeof(err_str),
 211                          "\"cannot parse net '%s'\"", nw);
 212                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 213                 goto out;
 214         }
 215
 216         if (LNET_NETTYP(net) == CIBLND    ||
 217             LNET_NETTYP(net) == OPENIBLND ||
 218             LNET_NETTYP(net) == IIBLND    ||
 219             LNET_NETTYP(net) == VIBLND) {
 220                 snprintf(err_str,
 221                          sizeof(err_str),
 222                          "\"obselete LNet type '%s'\"", libcfs_lnd2str(net));
 223                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 224                 goto out;
 225         }
 226
 227         gateway_nid = libcfs_str2nid(gw);
 228         if (gateway_nid == LNET_NID_ANY) {
 229                 snprintf(err_str,
 230                          sizeof(err_str),
 231                          "\"cannot parse gateway NID '%s'\"", gw);
 232                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 233                 goto out;
 234         }
 235
 236         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 237         data.cfg_net = net;
 238         data.cfg_nid = gateway_nid;
 239
 240         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_ROUTE, &data);
 241         if (rc != 0) {
 242                 snprintf(err_str,
 243                          sizeof(err_str),
 244                          "\"cannot delete route: %s\"", strerror(errno));
 245                 rc = -errno;
 246                 goto out;
 247         }
 248
 249 out:
 250         cYAML_build_error(rc, seq_no, DEL_CMD, "route", err_str, err_rc);
 251
 252         return rc;
 253 }
 254
 255 int lustre_lnet_show_route(char *nw, char *gw, int hops, int prio, int detail,
 256                            int seq_no, struct cYAML **show_rc,
 257                            struct cYAML **err_rc)
 258 {
 259         struct lnet_ioctl_config_data data;
 260         lnet_nid_t gateway_nid;
 261         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 262         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 263         int i;
 264         struct cYAML *root = NULL, *route = NULL, *item = NULL;
 265         struct cYAML *first_seq = NULL;
 266         char err_str[LNET_MAX_STR_LEN];
 267
 268         snprintf(err_str, sizeof(err_str),
 269                  "\"out of memory\"");
 270
 271         if (nw != NULL) {
 272                 net = libcfs_str2net(nw);
 273                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 274                         snprintf(err_str,
 275                                  sizeof(err_str),
 276                                  "\"cannot parse net '%s'\"", nw);
 277                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 278                         goto out;
 279                 }
 280
 281                 if (LNET_NETTYP(net) == CIBLND    ||
 282                     LNET_NETTYP(net) == OPENIBLND ||
 283                     LNET_NETTYP(net) == IIBLND    ||
 284                     LNET_NETTYP(net) == VIBLND) {
 285                         snprintf(err_str,
 286                                  sizeof(err_str),
 287                                  "\"obsolete LNet type '%s'\"",
 288                                  libcfs_lnd2str(net));
 289                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 290                         goto out;
 291                 }
 292         } else {
 293                 /* show all routes without filtering on net */
 294                 net = LNET_NIDNET(LNET_NID_ANY);
 295         }
 296
 297         if (gw != NULL) {
 298                 gateway_nid = libcfs_str2nid(gw);
 299                 if (gateway_nid == LNET_NID_ANY) {
 300                         snprintf(err_str,
 301                                  sizeof(err_str),
 302                                  "\"cannot parse gateway NID '%s'\"", gw);
 303                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 304                         goto out;
 305                 }
 306         } else
 307                 /* show all routes with out filtering on gateway */
 308                 gateway_nid = LNET_NID_ANY;
 309
 310         if ((hops < 1 && hops != -1) || hops > 255) {
 311                 snprintf(err_str,
 312                          sizeof(err_str),
 313                          "\"invalid hop count %d, must be between 0 and 256\"",
 314                          hops);
 315                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 316                 goto out;
 317         }
 318
 319         /* create struct cYAML root object */
 320         root = cYAML_create_object(NULL, NULL);
 321         if (root == NULL)
 322                 goto out;
 323
 324         route = cYAML_create_seq(root, "route");
 325         if (route == NULL)
 326                 goto out;
 327
 328         for (i = 0;; i++) {
 329                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 330                 data.cfg_count = i;
 331
 332                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_ROUTE, &data);
 333                 if (rc != 0)
 334                         break;
 335
 336                 /* filter on provided data */
 337                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
 338                     net != data.cfg_net)
 339                         continue;
 340
 341                 if (gateway_nid != LNET_NID_ANY &&
 342                     gateway_nid != data.cfg_nid)
 343                         continue;
 344
 345                 if (hops != -1 &&
 346                     hops != data.cfg_config_u.cfg_route.rtr_hop)
 347                         continue;
 348
 349                 if (prio != -1 &&
 350                     prio != data.cfg_config_u.cfg_route.rtr_priority)
 351                         continue;
 352
 353                 /* default rc to -1 incase we hit the goto */
 354                 rc = -1;
 355
 356                 item = cYAML_create_seq_item(route);
 357                 if (item == NULL)
 358                         goto out;
 359
 360                 if (first_seq == NULL)
 361                         first_seq = item;
 362
 363                 if (cYAML_create_string(item, "net",
 364                                         libcfs_net2str(data.cfg_net)) == NULL)
 365                         goto out;
 366
 367                 if (cYAML_create_string(item, "gateway",
 368                                         libcfs_nid2str(data.cfg_nid)) == NULL)
 369                         goto out;
 370
 371                 if (detail) {
 372                         if (cYAML_create_number(item, "hop",
 373                                                 data.cfg_config_u.cfg_route.
 374                                                         rtr_hop) ==
 375                             NULL)
 376                                 goto out;
 377
 378                         if (cYAML_create_number(item, "priority",
 379                                                 data.cfg_config_u.
 380                                                 cfg_route.rtr_priority) == NULL)
 381                                 goto out;
 382
 383                         if (cYAML_create_string(item, "state",
 384                                                 data.cfg_config_u.cfg_route.
 385                                                         rtr_flags ?
 386                                                 "up" : "down") == NULL)
 387                                 goto out;
 388                 }
 389         }
 390
 391         /* print output iff show_rc is not provided */
 392         if (show_rc == NULL)
 393                 cYAML_print_tree(root);
 394
 395         if (errno != ENOENT) {
 396                 snprintf(err_str,
 397                          sizeof(err_str),
 398                          "\"cannot get routes: %s\"",
 399                          strerror(errno));
 400                 rc = -errno;
 401                 goto out;
 402         } else
 403                 rc = LUSTRE_CFG_RC_NO_ERR;
 404
 405         snprintf(err_str, sizeof(err_str), "\"success\"");
 406 out:
 407         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
 408                 cYAML_free_tree(root);
 409         } else if (show_rc != NULL && *show_rc != NULL) {
 410                 struct cYAML *show_node;
 411                 /* find the route node, if one doesn't exist then
 412                  * insert one.  Otherwise add to the one there
 413                  */
 414                 show_node = cYAML_get_object_item(*show_rc, "route");
 415                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 416                         cYAML_insert_child(show_node, first_seq);
 417                         free(route);
 418                         free(root);
 419                 } else if (show_node == NULL) {
 420                         cYAML_insert_sibling((*show_rc)->cy_child,
 421                                                 route);
 422                         free(root);
 423                 } else {
 424                         cYAML_free_tree(root);
 425                 }
 426         } else {
 427                 *show_rc = root;
 428         }
 429
 430         cYAML_build_error(rc, seq_no, SHOW_CMD, "route", err_str, err_rc);
 431
 432         return rc;
 433 }
 434
 435 int lustre_lnet_config_net(char *net, char *intf, char *ip2net,
 436                            int peer_to, int peer_cr, int peer_buf_cr,
 437                            int credits, char *smp, int seq_no,
 438                            struct cYAML **err_rc)
 439 {
 440         struct lnet_ioctl_config_data data;
 441         char buf[LNET_MAX_STR_LEN];
 442         int rc = LUSTRE_CFG_RC_NO_ERR, num_of_nets = 0;
 443         char err_str[LNET_MAX_STR_LEN];
 444
 445         snprintf(err_str, sizeof(err_str), "\"success\"");
 446
 447         if (ip2net == NULL && (intf == NULL || net == NULL)) {
 448                 snprintf(err_str,
 449                          sizeof(err_str),
 450                          "\"mandatory parameter '%s' not specified."
 451                          " Optionally specify ip2net parameter\"",
 452                          (intf == NULL && net == NULL) ? "net, if" :
 453                          (intf == NULL) ? "if" : "net");
 454                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 455                 goto out;
 456         }
 457
 458         if (peer_to != -1 && peer_to <= 0) {
 459                 snprintf(err_str,
 460                          sizeof(err_str),
 461                          "\"peer timeout %d, must be greater than 0\"",
 462                          peer_to);
 463                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 464                 goto out;
 465         }
 466
 467         if (ip2net != NULL && strlen(ip2net) >= sizeof(buf)) {
 468                 snprintf(err_str,
 469                          sizeof(err_str),
 470                          "\"ip2net string too long %d\"",
 471                                 (int)strlen(ip2net));
 472                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 473                 goto out;
 474         }
 475
 476         if (ip2net == NULL)
 477                 snprintf(buf, sizeof(buf) - 1, "%s(%s)%s",
 478                         net, intf,
 479                         (smp) ? smp : "");
 480
 481         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 482         strncpy(data.cfg_config_u.cfg_net.net_intf,
 483                 (ip2net != NULL) ? ip2net : buf, sizeof(buf));
 484         data.cfg_config_u.cfg_net.net_peer_timeout = peer_to;
 485         data.cfg_config_u.cfg_net.net_peer_tx_credits = peer_cr;
 486         data.cfg_config_u.cfg_net.net_peer_rtr_credits = peer_buf_cr;
 487         data.cfg_config_u.cfg_net.net_max_tx_credits = credits;
 488
 489         num_of_nets = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_NET, &data);
 490         if (num_of_nets < 0) {
 491                 snprintf(err_str,
 492                          sizeof(err_str),
 493                          "\"cannot add network: %s\"", strerror(errno));
 494                 rc = -errno;
 495         }
 496
 497 out:
 498         cYAML_build_error((num_of_nets > 0) ? num_of_nets : rc,
 499                          seq_no, ADD_CMD, "net", err_str, err_rc);
 500
 501         return rc;
 502 }
 503
 504 int lustre_lnet_del_net(char *nw, int seq_no, struct cYAML **err_rc)
 505 {
 506         struct lnet_ioctl_config_data data;
 507         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 508         int rc = LUSTRE_CFG_RC_NO_ERR;
 509         char err_str[LNET_MAX_STR_LEN];
 510
 511         snprintf(err_str, sizeof(err_str), "\"success\"");
 512
 513         if (nw == NULL) {
 514                 snprintf(err_str,
 515                          sizeof(err_str),
 516                          "\"missing mandatory parameter\"");
 517                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 518                 goto out;
 519         }
 520
 521         net = libcfs_str2net(nw);
 522         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 523                 snprintf(err_str,
 524                          sizeof(err_str),
 525                          "\"cannot parse net '%s'\"", nw);
 526                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 527                 goto out;
 528         }
 529
 530         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 531         data.cfg_net = net;
 532
 533         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_NET, &data);
 534         if (rc != 0) {
 535                 snprintf(err_str,
 536                          sizeof(err_str),
 537                          "\"cannot delete network: %s\"", strerror(errno));
 538                 rc = -errno;
 539                 goto out;
 540         }
 541
 542 out:
 543         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
 544
 545         return rc;
 546 }
 547
 548 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
 549                          struct cYAML **show_rc, struct cYAML **err_rc)
 550 {
 551         char *buf;
 552         struct lnet_ioctl_config_data *data;
 553         struct lnet_ioctl_net_config *net_config;
 554         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 555         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
 556         struct cYAML *root = NULL, *tunables = NULL,
 557                 *net_node = NULL, *interfaces = NULL,
 558                 *item = NULL, *first_seq = NULL;
 559         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
 560         char str_buf[str_buf_len];
 561         char *pos;
 562         char err_str[LNET_MAX_STR_LEN];
 563
 564         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
 565
 566         buf = calloc(1, sizeof(*data) + sizeof(*net_config));
 567         if (buf == NULL)
 568                 goto out;
 569
 570         data = (struct lnet_ioctl_config_data *)buf;
 571
 572         if (nw != NULL) {
 573                 net = libcfs_str2net(nw);
 574                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 575                         snprintf(err_str,
 576                                  sizeof(err_str),
 577                                  "\"cannot parse net '%s'\"", nw);
 578                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 579                         goto out;
 580                 }
 581         }
 582
 583         root = cYAML_create_object(NULL, NULL);
 584         if (root == NULL)
 585                 goto out;
 586
 587         net_node = cYAML_create_seq(root, "net");
 588         if (net_node == NULL)
 589                 goto out;
 590
 591         for (i = 0;; i++) {
 592                 pos = str_buf;
 593
 594                 memset(buf, 0, sizeof(*data) + sizeof(*net_config));
 595
 596                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
 597                 /*
 598                  * set the ioc_len to the proper value since INIT assumes
 599                  * size of data
 600                  */
 601                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
 602                   sizeof(struct lnet_ioctl_net_config);
 603                 data->cfg_count = i;
 604
 605                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_NET, data);
 606                 if (rc != 0)
 607                         break;
 608
 609                 /* filter on provided data */
 610                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
 611                     net != LNET_NIDNET(data->cfg_nid))
 612                         continue;
 613
 614                 /* default rc to -1 in case we hit the goto */
 615                 rc = -1;
 616
 617                 net_config = (struct lnet_ioctl_net_config *)data->cfg_bulk;
 618
 619                 /* create the tree to be printed. */
 620                 item = cYAML_create_seq_item(net_node);
 621                 if (item == NULL)
 622                         goto out;
 623
 624                 if (first_seq == NULL)
 625                         first_seq = item;
 626
 627                 if (cYAML_create_string(item,
 628                                         "net",
 629                                         libcfs_net2str(
 630                                                 LNET_NIDNET(data->cfg_nid)))
 631                     == NULL)
 632                         goto out;
 633
 634                 if (cYAML_create_string(item, "nid",
 635                                         libcfs_nid2str(data->cfg_nid)) == NULL)
 636                         goto out;
 637
 638                 if (cYAML_create_string(item,
 639                                         "status",
 640                                         (net_config->ni_status ==
 641                                           LNET_NI_STATUS_UP) ?
 642                                             "up" : "down") == NULL)
 643                         goto out;
 644
 645                 /* don't add interfaces unless there is at least one
 646                  * interface */
 647                 if (strlen(net_config->ni_interfaces[0]) > 0) {
 648                         interfaces = cYAML_create_object(item, "interfaces");
 649                         if (interfaces == NULL)
 650                                 goto out;
 651
 652                         for (j = 0; j < LNET_MAX_INTERFACES; j++) {
 653                                 if (strlen(net_config->ni_interfaces[j]) > 0) {
 654                                         snprintf(str_buf,
 655                                                  sizeof(str_buf), "%d", j);
 656                                         if (cYAML_create_string(interfaces,
 657                                                 str_buf,
 658                                                 net_config->ni_interfaces[j]) ==
 659                                             NULL)
 660                                                 goto out;
 661                                 }
 662                         }
 663                 }
 664
 665                 if (detail) {
 666                         tunables = cYAML_create_object(item, "tunables");
 667                         if (tunables == NULL)
 668                                 goto out;
 669
 670                         if (cYAML_create_number(tunables, "peer_timeout",
 671                                                 data->cfg_config_u.cfg_net.
 672                                                  net_peer_timeout) == NULL)
 673                                 goto out;
 674
 675                         if (cYAML_create_number(tunables, "peer_credits",
 676                                                 data->cfg_config_u.cfg_net.
 677                                                   net_peer_tx_credits) == NULL)
 678                                 goto out;
 679
 680                         if (cYAML_create_number(tunables,
 681                                                 "peer_buffer_credits",
 682                                                 data->cfg_config_u.cfg_net.
 683                                                   net_peer_rtr_credits) == NULL)
 684                                 goto out;
 685
 686                         if (cYAML_create_number(tunables, "credits",
 687                                                 data->cfg_config_u.cfg_net.
 688                                                   net_max_tx_credits) == NULL)
 689                                 goto out;
 690
 691                         /* out put the CPTs in the format: "[x,x,x,...]" */
 692                         pos += snprintf(pos, str_buf + str_buf_len - pos, "[");
 693                         for (j = 0 ; data->cfg_ncpts > 1 &&
 694                                 j < data->cfg_ncpts; j++) {
 695                                 pos += snprintf(pos,
 696                                                 str_buf + str_buf_len - pos,
 697                                                 "%d", net_config->ni_cpts[j]);
 698                                 if ((j + 1) < data->cfg_ncpts)
 699                                         pos += snprintf(pos,
 700                                                         str_buf +
 701                                                          str_buf_len - pos,
 702                                                         ",");
 703                         }
 704                         if (str_buf + str_buf_len - pos <= 0)
 705                                 pos += snprintf(str_buf + str_buf_len - 2,
 706                                                 2, "]");
 707                         else
 708                                 pos += snprintf(pos,
 709                                                 str_buf + str_buf_len - pos,
 710                                                 "]");
 711
 712                         if (data->cfg_ncpts > 1 &&
 713                             cYAML_create_string(tunables, "CPT",
 714                                                 str_buf) == NULL)
 715                                 goto out;
 716                 }
 717         }
 718
 719         /* Print out the net information only if show_rc is not provided */
 720         if (show_rc == NULL)
 721                 cYAML_print_tree(root);
 722
 723         if (errno != ENOENT) {
 724                 snprintf(err_str,
 725                          sizeof(err_str),
 726                          "\"cannot get networks: %s\"",
 727                          strerror(errno));
 728                 rc = -errno;
 729                 goto out;
 730         } else
 731                 rc = LUSTRE_CFG_RC_NO_ERR;
 732
 733         snprintf(err_str, sizeof(err_str), "\"success\"");
 734 out:
 735         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
 736                 cYAML_free_tree(root);
 737         } else if (show_rc != NULL && *show_rc != NULL) {
 738                 struct cYAML *show_node;
 739                 /* find the net node, if one doesn't exist
 740                  * then insert one.  Otherwise add to the one there
 741                  */
 742                 show_node = cYAML_get_object_item(*show_rc, "net");
 743                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 744                         cYAML_insert_child(show_node, first_seq);
 745                         free(net_node);
 746                         free(root);
 747                 } else if (show_node == NULL) {
 748                         cYAML_insert_sibling((*show_rc)->cy_child,
 749                                                 net_node);
 750                         free(root);
 751                 } else {
 752                         cYAML_free_tree(root);
 753                 }
 754         } else {
 755                 *show_rc = root;
 756         }
 757
 758         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
 759
 760         return rc;
 761 }
 762
 763 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
 764 {
 765         struct lnet_ioctl_config_data data;
 766         int rc = LUSTRE_CFG_RC_NO_ERR;
 767         char err_str[LNET_MAX_STR_LEN];
 768
 769         snprintf(err_str, sizeof(err_str), "\"success\"");
 770
 771         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 772         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
 773
 774         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
 775         if (rc != 0) {
 776                 snprintf(err_str,
 777                          sizeof(err_str),
 778                          "\"cannot %s routing %s\"",
 779                          (enable) ? "enable" : "disable", strerror(errno));
 780                 rc = -errno;
 781                 goto out;
 782         }
 783
 784 out:
 785         cYAML_build_error(rc, seq_no,
 786                          (enable) ? ADD_CMD : DEL_CMD,
 787                          "routing", err_str, err_rc);
 788
 789         return rc;
 790 }
 791
 792 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
 793                                struct cYAML **err_rc)
 794 {
 795         struct lnet_ioctl_config_data data;
 796         int rc = LUSTRE_CFG_RC_NO_ERR;
 797         char err_str[LNET_MAX_STR_LEN];
 798
 799         snprintf(err_str, sizeof(err_str), "\"success\"");
 800
 801         /* -1 indicates to ignore changes to this field */
 802         if (tiny < -1 || small < -1 || large < -1) {
 803                 snprintf(err_str,
 804                          sizeof(err_str),
 805                          "\"tiny, small and large must be >= 0\"");
 806                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 807                 goto out;
 808         }
 809
 810         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 811         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
 812         data.cfg_config_u.cfg_buffers.buf_small = small;
 813         data.cfg_config_u.cfg_buffers.buf_large = large;
 814
 815         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
 816         if (rc != 0) {
 817                 snprintf(err_str,
 818                          sizeof(err_str),
 819                          "\"cannot configure buffers: %s\"", strerror(errno));
 820                 rc = -errno;
 821                 goto out;
 822         }
 823
 824 out:
 825         cYAML_build_error(rc, seq_no, DEL_CMD, "buf", err_str, err_rc);
 826
 827         return rc;
 828 }
 829
 830 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
 831                              struct cYAML **err_rc)
 832 {
 833         struct lnet_ioctl_config_data *data;
 834         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
 835         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 836         char *buf;
 837         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
 838         struct cYAML *root = NULL, *pools_node = NULL,
 839                      *type_node = NULL, *item = NULL, *cpt = NULL,
 840                      *first_seq = NULL;
 841         int i;
 842         char err_str[LNET_MAX_STR_LEN];
 843         char node_name[LNET_MAX_STR_LEN];
 844
 845         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
 846
 847         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
 848         if (buf == NULL)
 849                 goto out;
 850
 851         data = (struct lnet_ioctl_config_data *)buf;
 852
 853         root = cYAML_create_object(NULL, NULL);
 854         if (root == NULL)
 855                 goto out;
 856
 857         pools_node = cYAML_create_seq(root, "routing");
 858         if (pools_node == NULL)
 859                 goto out;
 860
 861         for (i = 0;; i++) {
 862                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
 863                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
 864                                         sizeof(struct lnet_ioctl_pool_cfg);
 865                 data->cfg_count = i;
 866
 867                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
 868                 if (rc != 0)
 869                         break;
 870
 871                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
 872
 873                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
 874                 item = cYAML_create_seq_item(pools_node);
 875                 if (item == NULL)
 876                         goto out;
 877
 878                 if (first_seq == NULL)
 879                         first_seq = item;
 880
 881                 cpt = cYAML_create_object(item, node_name);
 882                 if (cpt == NULL)
 883                         goto out;
 884
 885                 /* create the tree  and print */
 886                 for (i = 0; i < LNET_NRBPOOLS; i++) {
 887                         type_node = cYAML_create_object(cpt, pools[i]);
 888                         if (type_node == NULL)
 889                                 goto out;
 890                         if (cYAML_create_number(type_node, "npages",
 891                                                 pool_cfg->pl_pools[i].pl_npages)
 892                             == NULL)
 893                                 goto out;
 894                         if (cYAML_create_number(type_node, "nbuffers",
 895                                                 pool_cfg->pl_pools[i].
 896                                                   pl_nbuffers) == NULL)
 897                                 goto out;
 898                         if (cYAML_create_number(type_node, "credits",
 899                                                 pool_cfg->pl_pools[i].
 900                                                    pl_credits) == NULL)
 901                                 goto out;
 902                         if (cYAML_create_number(type_node, "mincredits",
 903                                                 pool_cfg->pl_pools[i].
 904                                                    pl_mincredits) == NULL)
 905                                 goto out;
 906                 }
 907         }
 908
 909         if (pool_cfg != NULL) {
 910                 item = cYAML_create_seq_item(pools_node);
 911                 if (item == NULL)
 912                         goto out;
 913
 914                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
 915                     NULL)
 916                         goto out;
 917         }
 918
 919         if (show_rc == NULL)
 920                 cYAML_print_tree(root);
 921
 922         if (errno != ENOENT) {
 923                 snprintf(err_str,
 924                          sizeof(err_str),
 925                          "\"cannot get routing information: %s\"",
 926                          strerror(errno));
 927                 rc = -errno;
 928                 goto out;
 929         } else
 930                 rc = LUSTRE_CFG_RC_NO_ERR;
 931
 932         snprintf(err_str, sizeof(err_str), "\"success\"");
 933         rc = LUSTRE_CFG_RC_NO_ERR;
 934
 935 out:
 936         free(buf);
 937         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
 938                 cYAML_free_tree(root);
 939         } else if (show_rc != NULL && *show_rc != NULL) {
 940                 struct cYAML *show_node;
 941                 /* find the routing node, if one doesn't exist then
 942                  * insert one.  Otherwise add to the one there
 943                  */
 944                 show_node = cYAML_get_object_item(*show_rc, "routing");
 945                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 946                         cYAML_insert_child(show_node, first_seq);
 947                         free(pools_node);
 948                         free(root);
 949                 } else if (show_node == NULL) {
 950                         cYAML_insert_sibling((*show_rc)->cy_child,
 951                                                 pools_node);
 952                         free(root);
 953                 } else {
 954                         cYAML_free_tree(root);
 955                 }
 956         } else {
 957                 *show_rc = root;
 958         }
 959
 960         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
 961
 962         return rc;
 963 }
 964
 965 int lustre_lnet_show_peer_credits(int seq_no, struct cYAML **show_rc,
 966                                   struct cYAML **err_rc)
 967 {
 968         struct lnet_ioctl_peer peer_info;
 969         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, ncpt = 0, i = 0, j = 0;
 970         struct cYAML *root = NULL, *peer = NULL, *first_seq = NULL,
 971                      *peer_root = NULL;
 972         char err_str[LNET_MAX_STR_LEN];
 973         bool ncpt_set = false;
 974
 975         snprintf(err_str, sizeof(err_str),
 976                  "\"out of memory\"");
 977
 978         /* create struct cYAML root object */
 979         root = cYAML_create_object(NULL, NULL);
 980         if (root == NULL)
 981                 goto out;
 982
 983         peer_root = cYAML_create_seq(root, "peer");
 984                 if (peer_root == NULL)
 985                         goto out;
 986
 987         do {
 988                 for (i = 0;; i++) {
 989                         LIBCFS_IOC_INIT_V2(peer_info, pr_hdr);
 990                         peer_info.pr_count = i;
 991                         peer_info.pr_lnd_u.pr_peer_credits.cr_ncpt = j;
 992                         rc = l_ioctl(LNET_DEV_ID,
 993                                      IOC_LIBCFS_GET_PEER_INFO, &peer_info);
 994                         if (rc != 0)
 995                                 break;
 996
 997                         if (ncpt_set != 0) {
 998                                 ncpt = peer_info.pr_lnd_u.pr_peer_credits.
 999                                         cr_ncpt;
1000                                 ncpt_set = true;
1001                         }
1002
1003                         peer = cYAML_create_seq_item(peer_root);
1004                         if (peer == NULL)
1005                                 goto out;
1006
1007                         if (first_seq == NULL)
1008                                 first_seq = peer;
1009
1010                         if (cYAML_create_string(peer, "nid",
1011                                                 libcfs_nid2str
1012                                                  (peer_info.pr_nid)) == NULL)
1013                                 goto out;
1014
1015                         if (cYAML_create_string(peer, "state",
1016                                                 peer_info.pr_lnd_u.
1017                                                   pr_peer_credits.
1018                                                         cr_aliveness) ==
1019                             NULL)
1020                                 goto out;
1021
1022                         if (cYAML_create_number(peer, "refcount",
1023                                                 peer_info.pr_lnd_u.
1024                                                   pr_peer_credits.
1025                                                         cr_refcount) == NULL)
1026                                 goto out;
1027
1028                         if (cYAML_create_number(peer, "max_ni_tx_credits",
1029                                                 peer_info.pr_lnd_u.
1030                                                   pr_peer_credits.
1031                                                     cr_ni_peer_tx_credits)
1032                             == NULL)
1033                                 goto out;
1034
1035                         if (cYAML_create_number(peer, "available_tx_credits",
1036                                                 peer_info.pr_lnd_u.
1037                                                   pr_peer_credits.
1038                                                     cr_peer_tx_credits)
1039                             == NULL)
1040                                 goto out;
1041
1042                         if (cYAML_create_number(peer, "available_rtr_credits",
1043                                                 peer_info.pr_lnd_u.
1044                                                   pr_peer_credits.
1045                                                     cr_peer_rtr_credits)
1046                             == NULL)
1047                                 goto out;
1048
1049                         if (cYAML_create_number(peer, "min_rtr_credits",
1050                                                 peer_info.pr_lnd_u.
1051                                                   pr_peer_credits.
1052                                                     cr_peer_min_rtr_credits)
1053                             == NULL)
1054                                 goto out;
1055
1056                         if (cYAML_create_number(peer, "tx_q_num_of_buf",
1057                                                 peer_info.pr_lnd_u.
1058                                                   pr_peer_credits.
1059                                                     cr_peer_tx_qnob)
1060                             == NULL)
1061                                 goto out;
1062                 }
1063
1064                 if (errno != ENOENT) {
1065                         snprintf(err_str,
1066                                 sizeof(err_str),
1067                                 "\"cannot get peer information: %s\"",
1068                                 strerror(errno));
1069                         rc = -errno;
1070                         goto out;
1071                 }
1072
1073                 j++;
1074         } while (j < ncpt);
1075
1076         /* print output iff show_rc is not provided */
1077         if (show_rc == NULL)
1078                 cYAML_print_tree(root);
1079
1080         snprintf(err_str, sizeof(err_str), "\"success\"");
1081         rc = LUSTRE_CFG_RC_NO_ERR;
1082
1083 out:
1084         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
1085                 cYAML_free_tree(root);
1086         } else if (show_rc != NULL && *show_rc != NULL) {
1087                 struct cYAML *show_node;
1088                 /* find the peer node, if one doesn't exist then
1089                  * insert one.  Otherwise add to the one there
1090                  */
1091                 show_node = cYAML_get_object_item(*show_rc,
1092                                                   "peer_credits");
1093                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
1094                         cYAML_insert_child(show_node, first_seq);
1095                         free(peer_root);
1096                         free(root);
1097                 } else if (show_node == NULL) {
1098                         cYAML_insert_sibling((*show_rc)->cy_child,
1099                                              peer_root);
1100                         free(root);
1101                 } else {
1102                         cYAML_free_tree(root);
1103                 }
1104         } else {
1105                 *show_rc = root;
1106         }
1107
1108         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer_credits", err_str,
1109                           err_rc);
1110
1111         return rc;
1112 }
1113
1114 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
1115                            struct cYAML **err_rc)
1116 {
1117         struct lnet_ioctl_lnet_stats data;
1118         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1119         char err_str[LNET_MAX_STR_LEN];
1120         struct cYAML *root = NULL, *stats = NULL;
1121
1122         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
1123
1124         LIBCFS_IOC_INIT_V2(data, st_hdr);
1125
1126         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LNET_STATS, &data);
1127         if (rc != 0) {
1128                 snprintf(err_str,
1129                          sizeof(err_str),
1130                          "\"cannot get lnet statistics: %s\"",
1131                          strerror(errno));
1132                 rc = -errno;
1133                 goto out;
1134         }
1135
1136         root = cYAML_create_object(NULL, NULL);
1137         if (root == NULL)
1138                 goto out;
1139
1140         stats = cYAML_create_object(root, "statistics");
1141         if (stats == NULL)
1142                 goto out;
1143
1144         if (cYAML_create_number(stats, "msgs_alloc",
1145                                 data.st_cntrs.msgs_alloc) == NULL)
1146                 goto out;
1147
1148         if (cYAML_create_number(stats, "msgs_max",
1149                                 data.st_cntrs.msgs_max) == NULL)
1150                 goto out;
1151
1152         if (cYAML_create_number(stats, "errors",
1153                                 data.st_cntrs.errors) == NULL)
1154                 goto out;
1155
1156         if (cYAML_create_number(stats, "send_count",
1157                                 data.st_cntrs.send_count) == NULL)
1158                 goto out;
1159
1160         if (cYAML_create_number(stats, "recv_count",
1161                                 data.st_cntrs.recv_count) == NULL)
1162                 goto out;
1163
1164         if (cYAML_create_number(stats, "route_count",
1165                                 data.st_cntrs.route_count) == NULL)
1166                 goto out;
1167
1168         if (cYAML_create_number(stats, "drop_count",
1169                                 data.st_cntrs.drop_count) == NULL)
1170                 goto out;
1171
1172         if (cYAML_create_number(stats, "send_length",
1173                                 data.st_cntrs.send_length) == NULL)
1174                 goto out;
1175
1176         if (cYAML_create_number(stats, "recv_length",
1177                                 data.st_cntrs.recv_length) == NULL)
1178                 goto out;
1179
1180         if (cYAML_create_number(stats, "route_length",
1181                                 data.st_cntrs.route_length) == NULL)
1182                 goto out;
1183
1184         if (cYAML_create_number(stats, "drop_length",
1185                                 data.st_cntrs.drop_length) == NULL)
1186                 goto out;
1187
1188         if (show_rc == NULL)
1189                 cYAML_print_tree(root);
1190
1191         snprintf(err_str, sizeof(err_str), "\"success\"");
1192 out:
1193         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
1194                 cYAML_free_tree(root);
1195         } else if (show_rc != NULL && *show_rc != NULL) {
1196                 cYAML_insert_sibling((*show_rc)->cy_child,
1197                                         root->cy_child);
1198                 free(root);
1199         } else {
1200                 *show_rc = root;
1201         }
1202
1203         cYAML_build_error(rc, seq_no, SHOW_CMD, "statistics", err_str, err_rc);
1204
1205         return rc;
1206 }
1207
1208 typedef int (*cmd_handler_t)(struct cYAML *tree,
1209                              struct cYAML **show_rc,
1210                              struct cYAML **err_rc);
1211
1212 static int handle_yaml_config_route(struct cYAML *tree, struct cYAML **show_rc,
1213                                     struct cYAML **err_rc)
1214 {
1215         struct cYAML *net, *gw, *hop, *prio, *seq_no;
1216
1217         net = cYAML_get_object_item(tree, "net");
1218         gw = cYAML_get_object_item(tree, "gateway");
1219         hop = cYAML_get_object_item(tree, "hop");
1220         prio = cYAML_get_object_item(tree, "priority");
1221         seq_no = cYAML_get_object_item(tree, "seq_no");
1222
1223         return lustre_lnet_config_route((net) ? net->cy_valuestring : NULL,
1224                                         (gw) ? gw->cy_valuestring : NULL,
1225                                         (hop) ? hop->cy_valueint : -1,
1226                                         (prio) ? prio->cy_valueint : -1,
1227                                         (seq_no) ? seq_no->cy_valueint : -1,
1228                                         err_rc);
1229 }
1230
1231 static int handle_yaml_config_net(struct cYAML *tree, struct cYAML **show_rc,
1232                                   struct cYAML **err_rc)
1233 {
1234         struct cYAML *net, *intf, *tunables, *seq_no,
1235               *peer_to = NULL, *peer_buf_cr = NULL, *peer_cr = NULL,
1236               *credits = NULL, *ip2net = NULL, *smp = NULL, *child;
1237         char devs[LNET_MAX_STR_LEN];
1238         char *loc = devs;
1239         int size = LNET_MAX_STR_LEN;
1240         int num;
1241         bool intf_found = false;
1242
1243         ip2net = cYAML_get_object_item(tree, "ip2net");
1244         net = cYAML_get_object_item(tree, "net");
1245         intf = cYAML_get_object_item(tree, "interfaces");
1246         if (intf != NULL) {
1247                 /* grab all the interfaces */
1248                 child = intf->cy_child;
1249                 while (child != NULL && size > 0) {
1250                         if (loc > devs)
1251                                 num  = snprintf(loc, size, ",%s",
1252                                                 child->cy_valuestring);
1253                         else
1254                                 num = snprintf(loc, size, "%s",
1255                                                child->cy_valuestring);
1256                         size -= num;
1257                         loc += num;
1258                         intf_found = true;
1259                         child = child->cy_next;
1260                 }
1261         }
1262
1263         tunables = cYAML_get_object_item(tree, "tunables");
1264         if (tunables != NULL) {
1265                 peer_to = cYAML_get_object_item(tunables, "peer_timeout");
1266                 peer_cr = cYAML_get_object_item(tunables, "peer_credits");
1267                 peer_buf_cr = cYAML_get_object_item(tunables,
1268                                                     "peer_buffer_credits");
1269                 credits = cYAML_get_object_item(tunables, "credits");
1270                 smp = cYAML_get_object_item(tunables, "CPT");
1271         }
1272         seq_no = cYAML_get_object_item(tree, "seq_no");
1273
1274         return lustre_lnet_config_net((net) ? net->cy_valuestring : NULL,
1275                                       (intf_found) ? devs : NULL,
1276                                       (ip2net) ? ip2net->cy_valuestring : NULL,
1277                                       (peer_to) ? peer_to->cy_valueint : -1,
1278                                       (peer_cr) ? peer_cr->cy_valueint : -1,
1279                                       (peer_buf_cr) ?
1280                                         peer_buf_cr->cy_valueint : -1,
1281                                       (credits) ? credits->cy_valueint : -1,
1282                                       (smp) ? smp->cy_valuestring : NULL,
1283                                       (seq_no) ? seq_no->cy_valueint : -1,
1284                                       err_rc);
1285 }
1286
1287 static int handle_yaml_config_buffers(struct cYAML *tree,
1288                                       struct cYAML **show_rc,
1289                                       struct cYAML **err_rc)
1290 {
1291         int rc;
1292         struct cYAML *tiny, *small, *large, *seq_no;
1293
1294         tiny = cYAML_get_object_item(tree, "tiny");
1295         small = cYAML_get_object_item(tree, "small");
1296         large = cYAML_get_object_item(tree, "large");
1297         seq_no = cYAML_get_object_item(tree, "seq_no");
1298
1299         rc = lustre_lnet_config_buffers((tiny) ? tiny->cy_valueint : -1,
1300                                         (small) ? small->cy_valueint : -1,
1301                                         (large) ? large->cy_valueint : -1,
1302                                         (seq_no) ? seq_no->cy_valueint : -1,
1303                                         err_rc);
1304
1305         return rc;
1306 }
1307
1308 static int handle_yaml_config_routing(struct cYAML *tree,
1309                                       struct cYAML **show_rc,
1310                                       struct cYAML **err_rc)
1311 {
1312         int rc = LUSTRE_CFG_RC_NO_ERR;
1313         struct cYAML *seq_no, *enable;
1314
1315         seq_no = cYAML_get_object_item(tree, "seq_no");
1316         enable = cYAML_get_object_item(tree, "enable");
1317
1318         if (enable) {
1319                 rc = lustre_lnet_enable_routing(enable->cy_valueint,
1320                                                 (seq_no) ?
1321                                                     seq_no->cy_valueint : -1,
1322                                                 err_rc);
1323         }
1324
1325         return rc;
1326 }
1327
1328 static int handle_yaml_del_route(struct cYAML *tree, struct cYAML **show_rc,
1329                                  struct cYAML **err_rc)
1330 {
1331         struct cYAML *net;
1332         struct cYAML *gw;
1333         struct cYAML *seq_no;
1334
1335         net = cYAML_get_object_item(tree, "net");
1336         gw = cYAML_get_object_item(tree, "gateway");
1337         seq_no = cYAML_get_object_item(tree, "seq_no");
1338
1339         return lustre_lnet_del_route((net) ? net->cy_valuestring : NULL,
1340                                      (gw) ? gw->cy_valuestring : NULL,
1341                                      (seq_no) ? seq_no->cy_valueint : -1,
1342                                      err_rc);
1343 }
1344
1345 static int handle_yaml_del_net(struct cYAML *tree, struct cYAML **show_rc,
1346                                struct cYAML **err_rc)
1347 {
1348         struct cYAML *net, *seq_no;
1349
1350         net = cYAML_get_object_item(tree, "net");
1351         seq_no = cYAML_get_object_item(tree, "seq_no");
1352
1353         return lustre_lnet_del_net((net) ? net->cy_valuestring : NULL,
1354                                    (seq_no) ? seq_no->cy_valueint : -1,
1355                                    err_rc);
1356 }
1357
1358 static int handle_yaml_del_routing(struct cYAML *tree, struct cYAML **show_rc,
1359                                    struct cYAML **err_rc)
1360 {
1361         struct cYAML *seq_no;
1362
1363         seq_no = cYAML_get_object_item(tree, "seq_no");
1364
1365         return lustre_lnet_enable_routing(0, (seq_no) ?
1366                                                 seq_no->cy_valueint : -1,
1367                                         err_rc);
1368 }
1369
1370 static int handle_yaml_show_route(struct cYAML *tree, struct cYAML **show_rc,
1371                                   struct cYAML **err_rc)
1372 {
1373         struct cYAML *net;
1374         struct cYAML *gw;
1375         struct cYAML *hop;
1376         struct cYAML *prio;
1377         struct cYAML *detail;
1378         struct cYAML *seq_no;
1379
1380         net = cYAML_get_object_item(tree, "net");
1381         gw = cYAML_get_object_item(tree, "gateway");
1382         hop = cYAML_get_object_item(tree, "hop");
1383         prio = cYAML_get_object_item(tree, "priority");
1384         detail = cYAML_get_object_item(tree, "detail");
1385         seq_no = cYAML_get_object_item(tree, "seq_no");
1386
1387         return lustre_lnet_show_route((net) ? net->cy_valuestring : NULL,
1388                                       (gw) ? gw->cy_valuestring : NULL,
1389                                       (hop) ? hop->cy_valueint : -1,
1390                                       (prio) ? prio->cy_valueint : -1,
1391                                       (detail) ? detail->cy_valueint : 0,
1392                                       (seq_no) ? seq_no->cy_valueint : -1,
1393                                       show_rc,
1394                                       err_rc);
1395 }
1396
1397 static int handle_yaml_show_net(struct cYAML *tree, struct cYAML **show_rc,
1398                                 struct cYAML **err_rc)
1399 {
1400         struct cYAML *net, *detail, *seq_no;
1401
1402         net = cYAML_get_object_item(tree, "net");
1403         detail = cYAML_get_object_item(tree, "detail");
1404         seq_no = cYAML_get_object_item(tree, "seq_no");
1405
1406         return lustre_lnet_show_net((net) ? net->cy_valuestring : NULL,
1407                                     (detail) ? detail->cy_valueint : 0,
1408                                     (seq_no) ? seq_no->cy_valueint : -1,
1409                                     show_rc,
1410                                     err_rc);
1411 }
1412
1413 static int handle_yaml_show_routing(struct cYAML *tree, struct cYAML **show_rc,
1414                                     struct cYAML **err_rc)
1415 {
1416         struct cYAML *seq_no;
1417
1418         seq_no = cYAML_get_object_item(tree, "seq_no");
1419
1420         return lustre_lnet_show_routing((seq_no) ? seq_no->cy_valueint : -1,
1421                                         show_rc, err_rc);
1422 }
1423
1424 static int handle_yaml_show_credits(struct cYAML *tree, struct cYAML **show_rc,
1425                                     struct cYAML **err_rc)
1426 {
1427         struct cYAML *seq_no;
1428
1429         seq_no = cYAML_get_object_item(tree, "seq_no");
1430
1431         return lustre_lnet_show_peer_credits((seq_no) ?
1432                                                 seq_no->cy_valueint : -1,
1433                                              show_rc, err_rc);
1434 }
1435
1436 static int handle_yaml_show_stats(struct cYAML *tree, struct cYAML **show_rc,
1437                                   struct cYAML **err_rc)
1438 {
1439         struct cYAML *seq_no;
1440
1441         seq_no = cYAML_get_object_item(tree, "seq_no");
1442
1443         return lustre_lnet_show_stats((seq_no) ? seq_no->cy_valueint : -1,
1444                                       show_rc, err_rc);
1445 }
1446
1447 struct lookup_cmd_hdlr_tbl {
1448         char *name;
1449         cmd_handler_t cb;
1450 };
1451
1452 static struct lookup_cmd_hdlr_tbl lookup_config_tbl[] = {
1453         {"route", handle_yaml_config_route},
1454         {"net", handle_yaml_config_net},
1455         {"routing", handle_yaml_config_routing},
1456         {"buffers", handle_yaml_config_buffers},
1457         {NULL, NULL}
1458 };
1459
1460 static struct lookup_cmd_hdlr_tbl lookup_del_tbl[] = {
1461         {"route", handle_yaml_del_route},
1462         {"net", handle_yaml_del_net},
1463         {"routing", handle_yaml_del_routing},
1464         {NULL, NULL}
1465 };
1466
1467 static struct lookup_cmd_hdlr_tbl lookup_show_tbl[] = {
1468         {"route", handle_yaml_show_route},
1469         {"net", handle_yaml_show_net},
1470         {"buffers", handle_yaml_show_routing},
1471         {"routing", handle_yaml_show_routing},
1472         {"credits", handle_yaml_show_credits},
1473         {"statistics", handle_yaml_show_stats},
1474         {NULL, NULL}
1475 };
1476
1477 static cmd_handler_t lookup_fn(char *key,
1478                                struct lookup_cmd_hdlr_tbl *tbl)
1479 {
1480         int i;
1481         if (key == NULL)
1482                 return NULL;
1483
1484         for (i = 0; tbl[i].name != NULL; i++) {
1485                 if (strncmp(key, tbl[i].name, strlen(tbl[i].name)) == 0)
1486                         return tbl[i].cb;
1487         }
1488
1489         return NULL;
1490 }
1491
1492 static int lustre_yaml_cb_helper(char *f, struct lookup_cmd_hdlr_tbl *table,
1493                                  struct cYAML **show_rc, struct cYAML **err_rc)
1494 {
1495         struct cYAML *tree, *item = NULL, *head, *child;
1496         cmd_handler_t cb;
1497         char err_str[LNET_MAX_STR_LEN];
1498         int rc = LUSTRE_CFG_RC_NO_ERR, return_rc = LUSTRE_CFG_RC_NO_ERR;
1499
1500         tree = cYAML_build_tree(f, NULL, 0, err_rc);
1501         if (tree == NULL)
1502                 return LUSTRE_CFG_RC_BAD_PARAM;
1503
1504         child = tree->cy_child;
1505         while (child != NULL) {
1506                 cb = lookup_fn(child->cy_string, table);
1507                 if (cb == NULL) {
1508                         snprintf(err_str, sizeof(err_str),
1509                                 "\"call back for '%s' not found\"",
1510                                 child->cy_string);
1511                         cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
1512                                         "yaml", "helper", err_str, err_rc);
1513                         goto out;
1514                 }
1515
1516                 if (cYAML_is_sequence(child)) {
1517                         while ((head = cYAML_get_next_seq_item(child, &item))
1518                                != NULL) {
1519                                 rc = cb(head, show_rc, err_rc);
1520                                 /* if processing fails or no cb is found
1521                                  * then fail */
1522                                 if (rc != LUSTRE_CFG_RC_NO_ERR) {
1523                                         snprintf(err_str, sizeof(err_str),
1524                                                 "\"Failed to process request:  "
1525                                                 "'%s' [%d, %p]\"",
1526                                                 head->cy_string, rc, cb);
1527                                         cYAML_build_error(
1528                                                 LUSTRE_CFG_RC_BAD_PARAM, -1,
1529                                                 "yaml", "helper", err_str,
1530                                                 err_rc);
1531                                         return_rc = rc;
1532                                 }
1533                         }
1534                 } else {
1535                         rc = cb(child, show_rc, err_rc);
1536                         /* if processing fails or no cb is found then fail */
1537                         if (rc != LUSTRE_CFG_RC_NO_ERR) {
1538                                 snprintf(err_str, sizeof(err_str),
1539                                         "\"Failed to process request: '%s'"
1540                                         " [%d, %p]\"",
1541                                         child->cy_string, rc, cb);
1542                                 cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
1543                                         "yaml", "helper", err_str, err_rc);
1544                                 return_rc = rc;
1545                         }
1546                 }
1547                 item = NULL;
1548                 child = child->cy_next;
1549         }
1550
1551 out:
1552         cYAML_free_tree(tree);
1553
1554         return return_rc;
1555 }
1556
1557 int lustre_yaml_config(char *f, struct cYAML **err_rc)
1558 {
1559         return lustre_yaml_cb_helper(f, lookup_config_tbl,
1560                                      NULL, err_rc);
1561 }
1562
1563 int lustre_yaml_del(char *f, struct cYAML **err_rc)
1564 {
1565         return lustre_yaml_cb_helper(f, lookup_del_tbl,
1566                                      NULL, err_rc);
1567 }
1568
1569 int lustre_yaml_show(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
1570 {
1571         return lustre_yaml_cb_helper(f, lookup_show_tbl,
1572                                      show_rc, err_rc);
1573 }