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, 2015, 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 <netdb.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sys/ioctl.h>
  43 #include <libcfs/util/ioctl.h>
  44 #include <lnet/lnetctl.h>
  45 #include <lnet/socklnd.h>
  46 #include <lnet/lnet.h>
  47 #include "liblnetconfig.h"
  48 #include "cyaml.h"
  49
  50 #define CONFIG_CMD              "configure"
  51 #define UNCONFIG_CMD            "unconfigure"
  52 #define ADD_CMD                 "add"
  53 #define DEL_CMD                 "del"
  54 #define SHOW_CMD                "show"
  55
  56 int lustre_lnet_config_lib_init(void)
  57 {
  58         return register_ioc_dev(LNET_DEV_ID, LNET_DEV_PATH,
  59                                 LNET_DEV_MAJOR, LNET_DEV_MINOR);
  60 }
  61
  62 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
  63                                  int seq_no, struct cYAML **err_rc)
  64 {
  65         struct libcfs_ioctl_data data;
  66         unsigned int opc;
  67         int rc;
  68         char err_str[LNET_MAX_STR_LEN];
  69
  70         snprintf(err_str, sizeof(err_str), "\"Success\"");
  71
  72         LIBCFS_IOC_INIT(data);
  73
  74         /* Reverse logic is used here in order not to change
  75          * the lctl utility */
  76         data.ioc_flags = load_ni_from_mod ? 0 : 1;
  77
  78         opc = up ? IOC_LIBCFS_CONFIGURE : IOC_LIBCFS_UNCONFIGURE;
  79
  80         rc = l_ioctl(LNET_DEV_ID, opc, &data);
  81         if (rc != 0) {
  82                 snprintf(err_str,
  83                         sizeof(err_str),
  84                         "\"LNet %s error: %s\"", (up) ? "configure" :
  85                         "unconfigure", strerror(errno));
  86                 rc = -errno;
  87         }
  88
  89         cYAML_build_error(rc, seq_no, (up) ? CONFIG_CMD : UNCONFIG_CMD,
  90                           "lnet", err_str, err_rc);
  91
  92         return rc;
  93 }
  94
  95 int lustre_lnet_config_route(char *nw, char *gw, int hops, int prio,
  96                              int seq_no, struct cYAML **err_rc)
  97 {
  98         struct lnet_ioctl_config_data data;
  99         lnet_nid_t gateway_nid;
 100         int rc = LUSTRE_CFG_RC_NO_ERR;
 101         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 102         char err_str[LNET_MAX_STR_LEN];
 103
 104         snprintf(err_str, sizeof(err_str), "\"Success\"");
 105
 106         if (nw == NULL || gw == NULL) {
 107                 snprintf(err_str,
 108                          sizeof(err_str),
 109                          "\"missing mandatory parameter(s): '%s'\"",
 110                          (nw == NULL && gw == NULL) ? "network, gateway" :
 111                          (nw == NULL) ? "network" : "gateway");
 112                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 113                 goto out;
 114         }
 115
 116         net = libcfs_str2net(nw);
 117         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 118                 snprintf(err_str,
 119                          sizeof(err_str),
 120                          "\"cannot parse net %s\"", nw);
 121                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 122                 goto out;
 123         }
 124
 125         if (LNET_NETTYP(net) == CIBLND    ||
 126             LNET_NETTYP(net) == OPENIBLND ||
 127             LNET_NETTYP(net) == IIBLND    ||
 128             LNET_NETTYP(net) == VIBLND) {
 129                 snprintf(err_str,
 130                          sizeof(err_str),
 131                          "\"obselete LNet type '%s'\"", libcfs_lnd2str(net));
 132                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 133                 goto out;
 134         }
 135
 136         gateway_nid = libcfs_str2nid(gw);
 137         if (gateway_nid == LNET_NID_ANY) {
 138                 snprintf(err_str,
 139                         sizeof(err_str),
 140                         "\"cannot parse gateway NID '%s'\"", gw);
 141                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 142                 goto out;
 143         }
 144
 145         if (hops == -1) {
 146                 /* -1 indicates to use the default hop value */
 147                 hops = 1;
 148         } else if (hops < 1 || hops > 255) {
 149                 snprintf(err_str,
 150                         sizeof(err_str),
 151                         "\"invalid hop count %d, must be between 0 and 256\"",
 152                         hops);
 153                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 154                 goto out;
 155         }
 156
 157         if (prio == -1) {
 158                 prio = 0;
 159         } else if (prio < 0) {
 160                 snprintf(err_str,
 161                          sizeof(err_str),
 162                         "\"invalid priority %d, must be greater than 0\"",
 163                         prio);
 164                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 165                 goto out;
 166         }
 167
 168         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 169         data.cfg_net = net;
 170         data.cfg_config_u.cfg_route.rtr_hop = hops;
 171         data.cfg_config_u.cfg_route.rtr_priority = prio;
 172         data.cfg_nid = gateway_nid;
 173
 174         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_ROUTE, &data);
 175         if (rc != 0) {
 176                 rc = -errno;
 177                 snprintf(err_str,
 178                          sizeof(err_str),
 179                          "\"cannot add route: %s\"", strerror(errno));
 180                 goto out;
 181         }
 182
 183 out:
 184         cYAML_build_error(rc, seq_no, ADD_CMD, "route", err_str, err_rc);
 185
 186         return rc;
 187 }
 188
 189 int lustre_lnet_del_route(char *nw, char *gw,
 190                           int seq_no, struct cYAML **err_rc)
 191 {
 192         struct lnet_ioctl_config_data data;
 193         lnet_nid_t gateway_nid;
 194         int rc = LUSTRE_CFG_RC_NO_ERR;
 195         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 196         char err_str[LNET_MAX_STR_LEN];
 197
 198         snprintf(err_str, sizeof(err_str), "\"Success\"");
 199
 200         if (nw == NULL || gw == NULL) {
 201                 snprintf(err_str,
 202                          sizeof(err_str),
 203                          "\"missing mandatory parameter(s): '%s'\"",
 204                          (nw == NULL && gw == NULL) ? "network, gateway" :
 205                          (nw == NULL) ? "network" : "gateway");
 206                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 207                 goto out;
 208         }
 209
 210         net = libcfs_str2net(nw);
 211         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 212                 snprintf(err_str,
 213                          sizeof(err_str),
 214                          "\"cannot parse net '%s'\"", nw);
 215                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 216                 goto out;
 217         }
 218
 219         if (LNET_NETTYP(net) == CIBLND    ||
 220             LNET_NETTYP(net) == OPENIBLND ||
 221             LNET_NETTYP(net) == IIBLND    ||
 222             LNET_NETTYP(net) == VIBLND) {
 223                 snprintf(err_str,
 224                          sizeof(err_str),
 225                          "\"obselete LNet type '%s'\"", libcfs_lnd2str(net));
 226                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 227                 goto out;
 228         }
 229
 230         gateway_nid = libcfs_str2nid(gw);
 231         if (gateway_nid == LNET_NID_ANY) {
 232                 snprintf(err_str,
 233                          sizeof(err_str),
 234                          "\"cannot parse gateway NID '%s'\"", gw);
 235                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 236                 goto out;
 237         }
 238
 239         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 240         data.cfg_net = net;
 241         data.cfg_nid = gateway_nid;
 242
 243         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_ROUTE, &data);
 244         if (rc != 0) {
 245                 rc = -errno;
 246                 snprintf(err_str,
 247                          sizeof(err_str),
 248                          "\"cannot delete route: %s\"", strerror(errno));
 249                 goto out;
 250         }
 251
 252 out:
 253         cYAML_build_error(rc, seq_no, DEL_CMD, "route", err_str, err_rc);
 254
 255         return rc;
 256 }
 257
 258 int lustre_lnet_show_route(char *nw, char *gw, int hops, int prio, int detail,
 259                            int seq_no, struct cYAML **show_rc,
 260                            struct cYAML **err_rc)
 261 {
 262         struct lnet_ioctl_config_data data;
 263         lnet_nid_t gateway_nid;
 264         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 265         int l_errno = 0;
 266         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 267         int i;
 268         struct cYAML *root = NULL, *route = NULL, *item = NULL;
 269         struct cYAML *first_seq = NULL;
 270         char err_str[LNET_MAX_STR_LEN];
 271         bool exist = false;
 272
 273         snprintf(err_str, sizeof(err_str),
 274                  "\"out of memory\"");
 275
 276         if (nw != NULL) {
 277                 net = libcfs_str2net(nw);
 278                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 279                         snprintf(err_str,
 280                                  sizeof(err_str),
 281                                  "\"cannot parse net '%s'\"", nw);
 282                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 283                         goto out;
 284                 }
 285
 286                 if (LNET_NETTYP(net) == CIBLND    ||
 287                     LNET_NETTYP(net) == OPENIBLND ||
 288                     LNET_NETTYP(net) == IIBLND    ||
 289                     LNET_NETTYP(net) == VIBLND) {
 290                         snprintf(err_str,
 291                                  sizeof(err_str),
 292                                  "\"obsolete LNet type '%s'\"",
 293                                  libcfs_lnd2str(net));
 294                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 295                         goto out;
 296                 }
 297         } else {
 298                 /* show all routes without filtering on net */
 299                 net = LNET_NIDNET(LNET_NID_ANY);
 300         }
 301
 302         if (gw != NULL) {
 303                 gateway_nid = libcfs_str2nid(gw);
 304                 if (gateway_nid == LNET_NID_ANY) {
 305                         snprintf(err_str,
 306                                  sizeof(err_str),
 307                                  "\"cannot parse gateway NID '%s'\"", gw);
 308                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 309                         goto out;
 310                 }
 311         } else
 312                 /* show all routes with out filtering on gateway */
 313                 gateway_nid = LNET_NID_ANY;
 314
 315         if ((hops < 1 && hops != -1) || hops > 255) {
 316                 snprintf(err_str,
 317                          sizeof(err_str),
 318                          "\"invalid hop count %d, must be between 0 and 256\"",
 319                          hops);
 320                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 321                 goto out;
 322         }
 323
 324         /* create struct cYAML root object */
 325         root = cYAML_create_object(NULL, NULL);
 326         if (root == NULL)
 327                 goto out;
 328
 329         route = cYAML_create_seq(root, "route");
 330         if (route == NULL)
 331                 goto out;
 332
 333         for (i = 0;; i++) {
 334                 LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 335                 data.cfg_count = i;
 336
 337                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_ROUTE, &data);
 338                 if (rc != 0) {
 339                         l_errno = errno;
 340                         break;
 341                 }
 342
 343                 /* filter on provided data */
 344                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
 345                     net != data.cfg_net)
 346                         continue;
 347
 348                 if (gateway_nid != LNET_NID_ANY &&
 349                     gateway_nid != data.cfg_nid)
 350                         continue;
 351
 352                 if (hops != -1 &&
 353                     hops != data.cfg_config_u.cfg_route.rtr_hop)
 354                         continue;
 355
 356                 if (prio != -1 &&
 357                     prio != data.cfg_config_u.cfg_route.rtr_priority)
 358                         continue;
 359
 360                 /* default rc to -1 incase we hit the goto */
 361                 rc = -1;
 362                 exist = true;
 363
 364                 item = cYAML_create_seq_item(route);
 365                 if (item == NULL)
 366                         goto out;
 367
 368                 if (first_seq == NULL)
 369                         first_seq = item;
 370
 371                 if (cYAML_create_string(item, "net",
 372                                         libcfs_net2str(data.cfg_net)) == NULL)
 373                         goto out;
 374
 375                 if (cYAML_create_string(item, "gateway",
 376                                         libcfs_nid2str(data.cfg_nid)) == NULL)
 377                         goto out;
 378
 379                 if (detail) {
 380                         if (cYAML_create_number(item, "hop",
 381                                                 data.cfg_config_u.cfg_route.
 382                                                         rtr_hop) ==
 383                             NULL)
 384                                 goto out;
 385
 386                         if (cYAML_create_number(item, "priority",
 387                                                 data.cfg_config_u.
 388                                                 cfg_route.rtr_priority) == NULL)
 389                                 goto out;
 390
 391                         if (cYAML_create_string(item, "state",
 392                                                 data.cfg_config_u.cfg_route.
 393                                                         rtr_flags ?
 394                                                 "up" : "down") == NULL)
 395                                 goto out;
 396                 }
 397         }
 398
 399         /* print output iff show_rc is not provided */
 400         if (show_rc == NULL)
 401                 cYAML_print_tree(root);
 402
 403         if (l_errno != ENOENT) {
 404                 snprintf(err_str,
 405                          sizeof(err_str),
 406                          "\"cannot get routes: %s\"",
 407                          strerror(l_errno));
 408                 rc = -l_errno;
 409                 goto out;
 410         } else
 411                 rc = LUSTRE_CFG_RC_NO_ERR;
 412
 413         snprintf(err_str, sizeof(err_str), "\"success\"");
 414 out:
 415         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
 416                 cYAML_free_tree(root);
 417         } else if (show_rc != NULL && *show_rc != NULL) {
 418                 struct cYAML *show_node;
 419                 /* find the route node, if one doesn't exist then
 420                  * insert one.  Otherwise add to the one there
 421                  */
 422                 show_node = cYAML_get_object_item(*show_rc, "route");
 423                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 424                         cYAML_insert_child(show_node, first_seq);
 425                         free(route);
 426                         free(root);
 427                 } else if (show_node == NULL) {
 428                         cYAML_insert_sibling((*show_rc)->cy_child,
 429                                                 route);
 430                         free(root);
 431                 } else {
 432                         cYAML_free_tree(root);
 433                 }
 434         } else {
 435                 *show_rc = root;
 436         }
 437
 438         cYAML_build_error(rc, seq_no, SHOW_CMD, "route", err_str, err_rc);
 439
 440         return rc;
 441 }
 442
 443 int lustre_lnet_config_net(char *net, char *intf, char *ip2net,
 444                            int peer_to, int peer_cr, int peer_buf_cr,
 445                            int credits, char *smp, int seq_no,
 446                            struct cYAML **err_rc)
 447 {
 448         struct lnet_ioctl_config_data data;
 449         char buf[LNET_MAX_STR_LEN];
 450         int rc = LUSTRE_CFG_RC_NO_ERR;
 451         char err_str[LNET_MAX_STR_LEN];
 452
 453         snprintf(err_str, sizeof(err_str), "\"success\"");
 454
 455         if (ip2net == NULL && (intf == NULL || net == NULL)) {
 456                 snprintf(err_str,
 457                          sizeof(err_str),
 458                          "\"mandatory parameter '%s' not specified."
 459                          " Optionally specify ip2net parameter\"",
 460                          (intf == NULL && net == NULL) ? "net, if" :
 461                          (intf == NULL) ? "if" : "net");
 462                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 463                 goto out;
 464         }
 465
 466         if (peer_to != -1 && peer_to <= 0) {
 467                 snprintf(err_str,
 468                          sizeof(err_str),
 469                          "\"peer timeout %d, must be greater than 0\"",
 470                          peer_to);
 471                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 472                 goto out;
 473         }
 474
 475         if (ip2net != NULL && strlen(ip2net) >= sizeof(buf)) {
 476                 snprintf(err_str,
 477                          sizeof(err_str),
 478                          "\"ip2net string too long %d\"",
 479                                 (int)strlen(ip2net));
 480                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 481                 goto out;
 482         }
 483
 484         if (ip2net == NULL)
 485                 snprintf(buf, sizeof(buf) - 1, "%s(%s)%s",
 486                         net, intf,
 487                         (smp) ? smp : "");
 488
 489         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 490         strncpy(data.cfg_config_u.cfg_net.net_intf,
 491                 (ip2net != NULL) ? ip2net : buf, sizeof(buf));
 492         data.cfg_config_u.cfg_net.net_peer_timeout = peer_to;
 493         data.cfg_config_u.cfg_net.net_peer_tx_credits = peer_cr;
 494         data.cfg_config_u.cfg_net.net_peer_rtr_credits = peer_buf_cr;
 495         data.cfg_config_u.cfg_net.net_max_tx_credits = credits;
 496
 497         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_NET, &data);
 498         if (rc < 0) {
 499                 rc = -errno;
 500                 snprintf(err_str,
 501                          sizeof(err_str),
 502                          "\"cannot add network: %s\"", strerror(errno));
 503         }
 504
 505 out:
 506         cYAML_build_error(rc, seq_no, ADD_CMD, "net", err_str, err_rc);
 507
 508         return rc;
 509 }
 510
 511 int lustre_lnet_del_net(char *nw, int seq_no, struct cYAML **err_rc)
 512 {
 513         struct lnet_ioctl_config_data data;
 514         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 515         int rc = LUSTRE_CFG_RC_NO_ERR;
 516         char err_str[LNET_MAX_STR_LEN];
 517
 518         snprintf(err_str, sizeof(err_str), "\"success\"");
 519
 520         if (nw == NULL) {
 521                 snprintf(err_str,
 522                          sizeof(err_str),
 523                          "\"missing mandatory parameter\"");
 524                 rc = LUSTRE_CFG_RC_MISSING_PARAM;
 525                 goto out;
 526         }
 527
 528         net = libcfs_str2net(nw);
 529         if (net == LNET_NIDNET(LNET_NID_ANY)) {
 530                 snprintf(err_str,
 531                          sizeof(err_str),
 532                          "\"cannot parse net '%s'\"", nw);
 533                 rc = LUSTRE_CFG_RC_BAD_PARAM;
 534                 goto out;
 535         }
 536
 537         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 538         data.cfg_net = net;
 539
 540         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_DEL_NET, &data);
 541         if (rc != 0) {
 542                 rc = -errno;
 543                 snprintf(err_str,
 544                          sizeof(err_str),
 545                          "\"cannot delete network: %s\"", strerror(errno));
 546                 goto out;
 547         }
 548
 549 out:
 550         cYAML_build_error(rc, seq_no, DEL_CMD, "net", err_str, err_rc);
 551
 552         return rc;
 553 }
 554
 555 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
 556                          struct cYAML **show_rc, struct cYAML **err_rc)
 557 {
 558         char *buf;
 559         struct lnet_ioctl_config_data *data;
 560         struct lnet_ioctl_net_config *net_config;
 561         __u32 net = LNET_NIDNET(LNET_NID_ANY);
 562         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, i, j;
 563         int l_errno = 0;
 564         struct cYAML *root = NULL, *tunables = NULL,
 565                 *net_node = NULL, *interfaces = NULL,
 566                 *item = NULL, *first_seq = NULL;
 567         int str_buf_len = LNET_MAX_SHOW_NUM_CPT * 2;
 568         char str_buf[str_buf_len];
 569         char *pos;
 570         char err_str[LNET_MAX_STR_LEN];
 571         bool exist = false;
 572
 573         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
 574
 575         buf = calloc(1, sizeof(*data) + sizeof(*net_config));
 576         if (buf == NULL)
 577                 goto out;
 578
 579         data = (struct lnet_ioctl_config_data *)buf;
 580
 581         if (nw != NULL) {
 582                 net = libcfs_str2net(nw);
 583                 if (net == LNET_NIDNET(LNET_NID_ANY)) {
 584                         snprintf(err_str,
 585                                  sizeof(err_str),
 586                                  "\"cannot parse net '%s'\"", nw);
 587                         rc = LUSTRE_CFG_RC_BAD_PARAM;
 588                         goto out;
 589                 }
 590         }
 591
 592         root = cYAML_create_object(NULL, NULL);
 593         if (root == NULL)
 594                 goto out;
 595
 596         net_node = cYAML_create_seq(root, "net");
 597         if (net_node == NULL)
 598                 goto out;
 599
 600         for (i = 0;; i++) {
 601                 pos = str_buf;
 602
 603                 memset(buf, 0, sizeof(*data) + sizeof(*net_config));
 604
 605                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
 606                 /*
 607                  * set the ioc_len to the proper value since INIT assumes
 608                  * size of data
 609                  */
 610                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
 611                   sizeof(struct lnet_ioctl_net_config);
 612                 data->cfg_count = i;
 613
 614                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_NET, data);
 615                 if (rc != 0) {
 616                         l_errno = errno;
 617                         break;
 618                 }
 619
 620                 /* filter on provided data */
 621                 if (net != LNET_NIDNET(LNET_NID_ANY) &&
 622                     net != LNET_NIDNET(data->cfg_nid))
 623                         continue;
 624
 625                 /* default rc to -1 in case we hit the goto */
 626                 rc = -1;
 627                 exist = true;
 628
 629                 net_config = (struct lnet_ioctl_net_config *)data->cfg_bulk;
 630
 631                 /* create the tree to be printed. */
 632                 item = cYAML_create_seq_item(net_node);
 633                 if (item == NULL)
 634                         goto out;
 635
 636                 if (first_seq == NULL)
 637                         first_seq = item;
 638
 639                 if (cYAML_create_string(item,
 640                                         "net",
 641                                         libcfs_net2str(
 642                                                 LNET_NIDNET(data->cfg_nid)))
 643                     == NULL)
 644                         goto out;
 645
 646                 if (cYAML_create_string(item, "nid",
 647                                         libcfs_nid2str(data->cfg_nid)) == NULL)
 648                         goto out;
 649
 650                 if (cYAML_create_string(item,
 651                                         "status",
 652                                         (net_config->ni_status ==
 653                                           LNET_NI_STATUS_UP) ?
 654                                             "up" : "down") == NULL)
 655                         goto out;
 656
 657                 /* don't add interfaces unless there is at least one
 658                  * interface */
 659                 if (strlen(net_config->ni_interfaces[0]) > 0) {
 660                         interfaces = cYAML_create_object(item, "interfaces");
 661                         if (interfaces == NULL)
 662                                 goto out;
 663
 664                         for (j = 0; j < LNET_MAX_INTERFACES; j++) {
 665                                 if (strlen(net_config->ni_interfaces[j]) > 0) {
 666                                         snprintf(str_buf,
 667                                                  sizeof(str_buf), "%d", j);
 668                                         if (cYAML_create_string(interfaces,
 669                                                 str_buf,
 670                                                 net_config->ni_interfaces[j]) ==
 671                                             NULL)
 672                                                 goto out;
 673                                 }
 674                         }
 675                 }
 676
 677                 if (detail) {
 678                         char *limit;
 679
 680                         tunables = cYAML_create_object(item, "tunables");
 681                         if (tunables == NULL)
 682                                 goto out;
 683
 684                         if (cYAML_create_number(tunables, "peer_timeout",
 685                                                 data->cfg_config_u.cfg_net.
 686                                                  net_peer_timeout) == NULL)
 687                                 goto out;
 688
 689                         if (cYAML_create_number(tunables, "peer_credits",
 690                                                 data->cfg_config_u.cfg_net.
 691                                                   net_peer_tx_credits) == NULL)
 692                                 goto out;
 693
 694                         if (cYAML_create_number(tunables,
 695                                                 "peer_buffer_credits",
 696                                                 data->cfg_config_u.cfg_net.
 697                                                   net_peer_rtr_credits) == NULL)
 698                                 goto out;
 699
 700                         if (cYAML_create_number(tunables, "credits",
 701                                                 data->cfg_config_u.cfg_net.
 702                                                   net_max_tx_credits) == NULL)
 703                                 goto out;
 704
 705                         /* out put the CPTs in the format: "[x,x,x,...]" */
 706                         limit = str_buf + str_buf_len - 3;
 707                         pos += snprintf(pos, limit - pos, "\"[");
 708                         for (j = 0 ; data->cfg_ncpts > 1 &&
 709                                 j < data->cfg_ncpts &&
 710                                 pos < limit; j++) {
 711                                 pos += snprintf(pos, limit - pos,
 712                                                 "%d", net_config->ni_cpts[j]);
 713                                 if ((j + 1) < data->cfg_ncpts)
 714                                         pos += snprintf(pos, limit - pos, ",");
 715                         }
 716                         pos += snprintf(pos, 3, "]\"");
 717
 718                         if (data->cfg_ncpts > 1 &&
 719                             cYAML_create_string(tunables, "CPT",
 720                                                 str_buf) == NULL)
 721                                 goto out;
 722                 }
 723         }
 724
 725         /* Print out the net information only if show_rc is not provided */
 726         if (show_rc == NULL)
 727                 cYAML_print_tree(root);
 728
 729         if (l_errno != ENOENT) {
 730                 snprintf(err_str,
 731                          sizeof(err_str),
 732                          "\"cannot get networks: %s\"",
 733                          strerror(l_errno));
 734                 rc = -l_errno;
 735                 goto out;
 736         } else
 737                 rc = LUSTRE_CFG_RC_NO_ERR;
 738
 739         snprintf(err_str, sizeof(err_str), "\"success\"");
 740 out:
 741         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
 742                 cYAML_free_tree(root);
 743         } else if (show_rc != NULL && *show_rc != NULL) {
 744                 struct cYAML *show_node;
 745                 /* find the net node, if one doesn't exist
 746                  * then insert one.  Otherwise add to the one there
 747                  */
 748                 show_node = cYAML_get_object_item(*show_rc, "net");
 749                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 750                         cYAML_insert_child(show_node, first_seq);
 751                         free(net_node);
 752                         free(root);
 753                 } else if (show_node == NULL) {
 754                         cYAML_insert_sibling((*show_rc)->cy_child,
 755                                                 net_node);
 756                         free(root);
 757                 } else {
 758                         cYAML_free_tree(root);
 759                 }
 760         } else {
 761                 *show_rc = root;
 762         }
 763
 764         cYAML_build_error(rc, seq_no, SHOW_CMD, "net", err_str, err_rc);
 765
 766         return rc;
 767 }
 768
 769 int lustre_lnet_enable_routing(int enable, int seq_no, struct cYAML **err_rc)
 770 {
 771         struct lnet_ioctl_config_data data;
 772         int rc = LUSTRE_CFG_RC_NO_ERR;
 773         char err_str[LNET_MAX_STR_LEN];
 774
 775         snprintf(err_str, sizeof(err_str), "\"success\"");
 776
 777         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 778         data.cfg_config_u.cfg_buffers.buf_enable = (enable) ? 1 : 0;
 779
 780         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CONFIG_RTR, &data);
 781         if (rc != 0) {
 782                 rc = -errno;
 783                 snprintf(err_str,
 784                          sizeof(err_str),
 785                          "\"cannot %s routing %s\"",
 786                          (enable) ? "enable" : "disable", strerror(errno));
 787                 goto out;
 788         }
 789
 790 out:
 791         cYAML_build_error(rc, seq_no,
 792                          (enable) ? ADD_CMD : DEL_CMD,
 793                          "routing", err_str, err_rc);
 794
 795         return rc;
 796 }
 797
 798 int lustre_lnet_config_buffers(int tiny, int small, int large, int seq_no,
 799                                struct cYAML **err_rc)
 800 {
 801         struct lnet_ioctl_config_data data;
 802         int rc = LUSTRE_CFG_RC_NO_ERR;
 803         char err_str[LNET_MAX_STR_LEN];
 804
 805         snprintf(err_str, sizeof(err_str), "\"success\"");
 806
 807         /* -1 indicates to ignore changes to this field */
 808         if (tiny < -1 || small < -1 || large < -1) {
 809                 snprintf(err_str,
 810                          sizeof(err_str),
 811                          "\"tiny, small and large must be >= 0\"");
 812                 rc = LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM;
 813                 goto out;
 814         }
 815
 816         LIBCFS_IOC_INIT_V2(data, cfg_hdr);
 817         data.cfg_config_u.cfg_buffers.buf_tiny = tiny;
 818         data.cfg_config_u.cfg_buffers.buf_small = small;
 819         data.cfg_config_u.cfg_buffers.buf_large = large;
 820
 821         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_ADD_BUF, &data);
 822         if (rc != 0) {
 823                 rc = -errno;
 824                 snprintf(err_str,
 825                          sizeof(err_str),
 826                          "\"cannot configure buffers: %s\"", strerror(errno));
 827                 goto out;
 828         }
 829
 830 out:
 831         cYAML_build_error(rc, seq_no, DEL_CMD, "buf", err_str, err_rc);
 832
 833         return rc;
 834 }
 835
 836 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
 837                              struct cYAML **err_rc)
 838 {
 839         struct lnet_ioctl_config_data *data;
 840         struct lnet_ioctl_pool_cfg *pool_cfg = NULL;
 841         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
 842         int l_errno = 0;
 843         char *buf;
 844         char *pools[LNET_NRBPOOLS] = {"tiny", "small", "large"};
 845         struct cYAML *root = NULL, *pools_node = NULL,
 846                      *type_node = NULL, *item = NULL, *cpt = NULL,
 847                      *first_seq = NULL;
 848         int i, j;
 849         char err_str[LNET_MAX_STR_LEN];
 850         char node_name[LNET_MAX_STR_LEN];
 851         bool exist = false;
 852
 853         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
 854
 855         buf = calloc(1, sizeof(*data) + sizeof(*pool_cfg));
 856         if (buf == NULL)
 857                 goto out;
 858
 859         data = (struct lnet_ioctl_config_data *)buf;
 860
 861         root = cYAML_create_object(NULL, NULL);
 862         if (root == NULL)
 863                 goto out;
 864
 865         pools_node = cYAML_create_seq(root, "routing");
 866         if (pools_node == NULL)
 867                 goto out;
 868
 869         for (i = 0;; i++) {
 870                 LIBCFS_IOC_INIT_V2(*data, cfg_hdr);
 871                 data->cfg_hdr.ioc_len = sizeof(struct lnet_ioctl_config_data) +
 872                                         sizeof(struct lnet_ioctl_pool_cfg);
 873                 data->cfg_count = i;
 874
 875                 rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_BUF, data);
 876                 if (rc != 0) {
 877                         l_errno = errno;
 878                         break;
 879                 }
 880
 881                 exist = true;
 882
 883                 pool_cfg = (struct lnet_ioctl_pool_cfg *)data->cfg_bulk;
 884
 885                 snprintf(node_name, sizeof(node_name), "cpt[%d]", i);
 886                 item = cYAML_create_seq_item(pools_node);
 887                 if (item == NULL)
 888                         goto out;
 889
 890                 if (first_seq == NULL)
 891                         first_seq = item;
 892
 893                 cpt = cYAML_create_object(item, node_name);
 894                 if (cpt == NULL)
 895                         goto out;
 896
 897                 /* create the tree  and print */
 898                 for (j = 0; j < LNET_NRBPOOLS; j++) {
 899                         type_node = cYAML_create_object(cpt, pools[j]);
 900                         if (type_node == NULL)
 901                                 goto out;
 902                         if (cYAML_create_number(type_node, "npages",
 903                                                 pool_cfg->pl_pools[j].pl_npages)
 904                             == NULL)
 905                                 goto out;
 906                         if (cYAML_create_number(type_node, "nbuffers",
 907                                                 pool_cfg->pl_pools[j].
 908                                                   pl_nbuffers) == NULL)
 909                                 goto out;
 910                         if (cYAML_create_number(type_node, "credits",
 911                                                 pool_cfg->pl_pools[j].
 912                                                    pl_credits) == NULL)
 913                                 goto out;
 914                         if (cYAML_create_number(type_node, "mincredits",
 915                                                 pool_cfg->pl_pools[j].
 916                                                    pl_mincredits) == NULL)
 917                                 goto out;
 918                 }
 919         }
 920
 921         if (pool_cfg != NULL) {
 922                 item = cYAML_create_seq_item(pools_node);
 923                 if (item == NULL)
 924                         goto out;
 925
 926                 if (cYAML_create_number(item, "enable", pool_cfg->pl_routing) ==
 927                     NULL)
 928                         goto out;
 929         }
 930
 931         if (show_rc == NULL)
 932                 cYAML_print_tree(root);
 933
 934         if (l_errno != ENOENT) {
 935                 snprintf(err_str,
 936                          sizeof(err_str),
 937                          "\"cannot get routing information: %s\"",
 938                          strerror(l_errno));
 939                 rc = -l_errno;
 940                 goto out;
 941         } else
 942                 rc = LUSTRE_CFG_RC_NO_ERR;
 943
 944         snprintf(err_str, sizeof(err_str), "\"success\"");
 945         rc = LUSTRE_CFG_RC_NO_ERR;
 946
 947 out:
 948         free(buf);
 949         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR || !exist) {
 950                 cYAML_free_tree(root);
 951         } else if (show_rc != NULL && *show_rc != NULL) {
 952                 struct cYAML *show_node;
 953                 /* find the routing node, if one doesn't exist then
 954                  * insert one.  Otherwise add to the one there
 955                  */
 956                 show_node = cYAML_get_object_item(*show_rc, "routing");
 957                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
 958                         cYAML_insert_child(show_node, first_seq);
 959                         free(pools_node);
 960                         free(root);
 961                 } else if (show_node == NULL) {
 962                         cYAML_insert_sibling((*show_rc)->cy_child,
 963                                                 pools_node);
 964                         free(root);
 965                 } else {
 966                         cYAML_free_tree(root);
 967                 }
 968         } else {
 969                 *show_rc = root;
 970         }
 971
 972         cYAML_build_error(rc, seq_no, SHOW_CMD, "routing", err_str, err_rc);
 973
 974         return rc;
 975 }
 976
 977 int lustre_lnet_show_peer_credits(int seq_no, struct cYAML **show_rc,
 978                                   struct cYAML **err_rc)
 979 {
 980         struct lnet_ioctl_peer peer_info;
 981         int rc = LUSTRE_CFG_RC_OUT_OF_MEM, ncpt = 0, i = 0, j = 0;
 982         int l_errno = 0;
 983         struct cYAML *root = NULL, *peer = NULL, *first_seq = NULL,
 984                      *peer_root = NULL;
 985         char err_str[LNET_MAX_STR_LEN];
 986         bool ncpt_set = false;
 987
 988         snprintf(err_str, sizeof(err_str),
 989                  "\"out of memory\"");
 990
 991         /* create struct cYAML root object */
 992         root = cYAML_create_object(NULL, NULL);
 993         if (root == NULL)
 994                 goto out;
 995
 996         peer_root = cYAML_create_seq(root, "peer");
 997         if (peer_root == NULL)
 998                 goto out;
 999
1000         do {
1001                 for (i = 0;; i++) {
1002                         LIBCFS_IOC_INIT_V2(peer_info, pr_hdr);
1003                         peer_info.pr_count = i;
1004                         peer_info.pr_lnd_u.pr_peer_credits.cr_ncpt = j;
1005                         rc = l_ioctl(LNET_DEV_ID,
1006                                      IOC_LIBCFS_GET_PEER_INFO, &peer_info);
1007                         if (rc != 0) {
1008                                 l_errno = errno;
1009                                 break;
1010                         }
1011
1012                         if (ncpt_set != 0) {
1013                                 ncpt = peer_info.pr_lnd_u.pr_peer_credits.
1014                                         cr_ncpt;
1015                                 ncpt_set = true;
1016                         }
1017
1018                         peer = cYAML_create_seq_item(peer_root);
1019                         if (peer == NULL)
1020                                 goto out;
1021
1022                         if (first_seq == NULL)
1023                                 first_seq = peer;
1024
1025                         if (cYAML_create_string(peer, "nid",
1026                                                 libcfs_nid2str
1027                                                  (peer_info.pr_nid)) == NULL)
1028                                 goto out;
1029
1030                         if (cYAML_create_string(peer, "state",
1031                                                 peer_info.pr_lnd_u.
1032                                                   pr_peer_credits.
1033                                                         cr_aliveness) ==
1034                             NULL)
1035                                 goto out;
1036
1037                         if (cYAML_create_number(peer, "refcount",
1038                                                 peer_info.pr_lnd_u.
1039                                                   pr_peer_credits.
1040                                                         cr_refcount) == NULL)
1041                                 goto out;
1042
1043                         if (cYAML_create_number(peer, "max_ni_tx_credits",
1044                                                 peer_info.pr_lnd_u.
1045                                                   pr_peer_credits.
1046                                                     cr_ni_peer_tx_credits)
1047                             == NULL)
1048                                 goto out;
1049
1050                         if (cYAML_create_number(peer, "available_tx_credits",
1051                                                 peer_info.pr_lnd_u.
1052                                                   pr_peer_credits.
1053                                                     cr_peer_tx_credits)
1054                             == NULL)
1055                                 goto out;
1056
1057                         if (cYAML_create_number(peer, "available_rtr_credits",
1058                                                 peer_info.pr_lnd_u.
1059                                                   pr_peer_credits.
1060                                                     cr_peer_rtr_credits)
1061                             == NULL)
1062                                 goto out;
1063
1064                         if (cYAML_create_number(peer, "min_rtr_credits",
1065                                                 peer_info.pr_lnd_u.
1066                                                   pr_peer_credits.
1067                                                     cr_peer_min_rtr_credits)
1068                             == NULL)
1069                                 goto out;
1070
1071                         if (cYAML_create_number(peer, "tx_q_num_of_buf",
1072                                                 peer_info.pr_lnd_u.
1073                                                   pr_peer_credits.
1074                                                     cr_peer_tx_qnob)
1075                             == NULL)
1076                                 goto out;
1077                 }
1078
1079                 if (l_errno != ENOENT) {
1080                         snprintf(err_str,
1081                                 sizeof(err_str),
1082                                 "\"cannot get peer information: %s\"",
1083                                 strerror(l_errno));
1084                         rc = -l_errno;
1085                         goto out;
1086                 }
1087
1088                 j++;
1089         } while (j < ncpt);
1090
1091         /* print output iff show_rc is not provided */
1092         if (show_rc == NULL)
1093                 cYAML_print_tree(root);
1094
1095         snprintf(err_str, sizeof(err_str), "\"success\"");
1096         rc = LUSTRE_CFG_RC_NO_ERR;
1097
1098 out:
1099         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
1100                 cYAML_free_tree(root);
1101         } else if (show_rc != NULL && *show_rc != NULL) {
1102                 struct cYAML *show_node;
1103                 /* find the peer node, if one doesn't exist then
1104                  * insert one.  Otherwise add to the one there
1105                  */
1106                 show_node = cYAML_get_object_item(*show_rc,
1107                                                   "peer_credits");
1108                 if (show_node != NULL && cYAML_is_sequence(show_node)) {
1109                         cYAML_insert_child(show_node, first_seq);
1110                         free(peer_root);
1111                         free(root);
1112                 } else if (show_node == NULL) {
1113                         cYAML_insert_sibling((*show_rc)->cy_child,
1114                                              peer_root);
1115                         free(root);
1116                 } else {
1117                         cYAML_free_tree(root);
1118                 }
1119         } else {
1120                 *show_rc = root;
1121         }
1122
1123         cYAML_build_error(rc, seq_no, SHOW_CMD, "peer_credits", err_str,
1124                           err_rc);
1125
1126         return rc;
1127 }
1128
1129 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
1130                            struct cYAML **err_rc)
1131 {
1132         struct lnet_ioctl_lnet_stats data;
1133         int rc = LUSTRE_CFG_RC_OUT_OF_MEM;
1134         int l_errno;
1135         char err_str[LNET_MAX_STR_LEN];
1136         struct cYAML *root = NULL, *stats = NULL;
1137
1138         snprintf(err_str, sizeof(err_str), "\"out of memory\"");
1139
1140         LIBCFS_IOC_INIT_V2(data, st_hdr);
1141
1142         rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_GET_LNET_STATS, &data);
1143         if (rc != 0) {
1144                 l_errno = errno;
1145                 snprintf(err_str,
1146                          sizeof(err_str),
1147                          "\"cannot get lnet statistics: %s\"",
1148                          strerror(l_errno));
1149                 rc = -l_errno;
1150                 goto out;
1151         }
1152
1153         root = cYAML_create_object(NULL, NULL);
1154         if (root == NULL)
1155                 goto out;
1156
1157         stats = cYAML_create_object(root, "statistics");
1158         if (stats == NULL)
1159                 goto out;
1160
1161         if (cYAML_create_number(stats, "msgs_alloc",
1162                                 data.st_cntrs.msgs_alloc) == NULL)
1163                 goto out;
1164
1165         if (cYAML_create_number(stats, "msgs_max",
1166                                 data.st_cntrs.msgs_max) == NULL)
1167                 goto out;
1168
1169         if (cYAML_create_number(stats, "errors",
1170                                 data.st_cntrs.errors) == NULL)
1171                 goto out;
1172
1173         if (cYAML_create_number(stats, "send_count",
1174                                 data.st_cntrs.send_count) == NULL)
1175                 goto out;
1176
1177         if (cYAML_create_number(stats, "recv_count",
1178                                 data.st_cntrs.recv_count) == NULL)
1179                 goto out;
1180
1181         if (cYAML_create_number(stats, "route_count",
1182                                 data.st_cntrs.route_count) == NULL)
1183                 goto out;
1184
1185         if (cYAML_create_number(stats, "drop_count",
1186                                 data.st_cntrs.drop_count) == NULL)
1187                 goto out;
1188
1189         if (cYAML_create_number(stats, "send_length",
1190                                 data.st_cntrs.send_length) == NULL)
1191                 goto out;
1192
1193         if (cYAML_create_number(stats, "recv_length",
1194                                 data.st_cntrs.recv_length) == NULL)
1195                 goto out;
1196
1197         if (cYAML_create_number(stats, "route_length",
1198                                 data.st_cntrs.route_length) == NULL)
1199                 goto out;
1200
1201         if (cYAML_create_number(stats, "drop_length",
1202                                 data.st_cntrs.drop_length) == NULL)
1203                 goto out;
1204
1205         if (show_rc == NULL)
1206                 cYAML_print_tree(root);
1207
1208         snprintf(err_str, sizeof(err_str), "\"success\"");
1209 out:
1210         if (show_rc == NULL || rc != LUSTRE_CFG_RC_NO_ERR) {
1211                 cYAML_free_tree(root);
1212         } else if (show_rc != NULL && *show_rc != NULL) {
1213                 cYAML_insert_sibling((*show_rc)->cy_child,
1214                                         root->cy_child);
1215                 free(root);
1216         } else {
1217                 *show_rc = root;
1218         }
1219
1220         cYAML_build_error(rc, seq_no, SHOW_CMD, "statistics", err_str, err_rc);
1221
1222         return rc;
1223 }
1224
1225 typedef int (*cmd_handler_t)(struct cYAML *tree,
1226                              struct cYAML **show_rc,
1227                              struct cYAML **err_rc);
1228
1229 static int handle_yaml_config_route(struct cYAML *tree, struct cYAML **show_rc,
1230                                     struct cYAML **err_rc)
1231 {
1232         struct cYAML *net, *gw, *hop, *prio, *seq_no;
1233
1234         net = cYAML_get_object_item(tree, "net");
1235         gw = cYAML_get_object_item(tree, "gateway");
1236         hop = cYAML_get_object_item(tree, "hop");
1237         prio = cYAML_get_object_item(tree, "priority");
1238         seq_no = cYAML_get_object_item(tree, "seq_no");
1239
1240         return lustre_lnet_config_route((net) ? net->cy_valuestring : NULL,
1241                                         (gw) ? gw->cy_valuestring : NULL,
1242                                         (hop) ? hop->cy_valueint : -1,
1243                                         (prio) ? prio->cy_valueint : -1,
1244                                         (seq_no) ? seq_no->cy_valueint : -1,
1245                                         err_rc);
1246 }
1247
1248 static int handle_yaml_config_net(struct cYAML *tree, struct cYAML **show_rc,
1249                                   struct cYAML **err_rc)
1250 {
1251         struct cYAML *net, *intf, *tunables, *seq_no,
1252               *peer_to = NULL, *peer_buf_cr = NULL, *peer_cr = NULL,
1253               *credits = NULL, *ip2net = NULL, *smp = NULL, *child;
1254         char devs[LNET_MAX_STR_LEN];
1255         char *loc = devs;
1256         int size = LNET_MAX_STR_LEN;
1257         int num;
1258         bool intf_found = false;
1259
1260         ip2net = cYAML_get_object_item(tree, "ip2net");
1261         net = cYAML_get_object_item(tree, "net");
1262         intf = cYAML_get_object_item(tree, "interfaces");
1263         if (intf != NULL) {
1264                 /* grab all the interfaces */
1265                 child = intf->cy_child;
1266                 while (child != NULL && size > 0) {
1267                         if (loc > devs)
1268                                 num  = snprintf(loc, size, ",%s",
1269                                                 child->cy_valuestring);
1270                         else
1271                                 num = snprintf(loc, size, "%s",
1272                                                child->cy_valuestring);
1273                         size -= num;
1274                         loc += num;
1275                         intf_found = true;
1276                         child = child->cy_next;
1277                 }
1278         }
1279
1280         tunables = cYAML_get_object_item(tree, "tunables");
1281         if (tunables != NULL) {
1282                 peer_to = cYAML_get_object_item(tunables, "peer_timeout");
1283                 peer_cr = cYAML_get_object_item(tunables, "peer_credits");
1284                 peer_buf_cr = cYAML_get_object_item(tunables,
1285                                                     "peer_buffer_credits");
1286                 credits = cYAML_get_object_item(tunables, "credits");
1287                 smp = cYAML_get_object_item(tunables, "CPT");
1288         }
1289         seq_no = cYAML_get_object_item(tree, "seq_no");
1290
1291         return lustre_lnet_config_net((net) ? net->cy_valuestring : NULL,
1292                                       (intf_found) ? devs : NULL,
1293                                       (ip2net) ? ip2net->cy_valuestring : NULL,
1294                                       (peer_to) ? peer_to->cy_valueint : -1,
1295                                       (peer_cr) ? peer_cr->cy_valueint : -1,
1296                                       (peer_buf_cr) ?
1297                                         peer_buf_cr->cy_valueint : -1,
1298                                       (credits) ? credits->cy_valueint : -1,
1299                                       (smp) ? smp->cy_valuestring : NULL,
1300                                       (seq_no) ? seq_no->cy_valueint : -1,
1301                                       err_rc);
1302 }
1303
1304 static int handle_yaml_config_buffers(struct cYAML *tree,
1305                                       struct cYAML **show_rc,
1306                                       struct cYAML **err_rc)
1307 {
1308         int rc;
1309         struct cYAML *tiny, *small, *large, *seq_no;
1310
1311         tiny = cYAML_get_object_item(tree, "tiny");
1312         small = cYAML_get_object_item(tree, "small");
1313         large = cYAML_get_object_item(tree, "large");
1314         seq_no = cYAML_get_object_item(tree, "seq_no");
1315
1316         rc = lustre_lnet_config_buffers((tiny) ? tiny->cy_valueint : -1,
1317                                         (small) ? small->cy_valueint : -1,
1318                                         (large) ? large->cy_valueint : -1,
1319                                         (seq_no) ? seq_no->cy_valueint : -1,
1320                                         err_rc);
1321
1322         return rc;
1323 }
1324
1325 static int handle_yaml_config_routing(struct cYAML *tree,
1326                                       struct cYAML **show_rc,
1327                                       struct cYAML **err_rc)
1328 {
1329         int rc = LUSTRE_CFG_RC_NO_ERR;
1330         struct cYAML *seq_no, *enable;
1331
1332         seq_no = cYAML_get_object_item(tree, "seq_no");
1333         enable = cYAML_get_object_item(tree, "enable");
1334
1335         if (enable) {
1336                 rc = lustre_lnet_enable_routing(enable->cy_valueint,
1337                                                 (seq_no) ?
1338                                                     seq_no->cy_valueint : -1,
1339                                                 err_rc);
1340         }
1341
1342         return rc;
1343 }
1344
1345 static int handle_yaml_del_route(struct cYAML *tree, struct cYAML **show_rc,
1346                                  struct cYAML **err_rc)
1347 {
1348         struct cYAML *net;
1349         struct cYAML *gw;
1350         struct cYAML *seq_no;
1351
1352         net = cYAML_get_object_item(tree, "net");
1353         gw = cYAML_get_object_item(tree, "gateway");
1354         seq_no = cYAML_get_object_item(tree, "seq_no");
1355
1356         return lustre_lnet_del_route((net) ? net->cy_valuestring : NULL,
1357                                      (gw) ? gw->cy_valuestring : NULL,
1358                                      (seq_no) ? seq_no->cy_valueint : -1,
1359                                      err_rc);
1360 }
1361
1362 static int handle_yaml_del_net(struct cYAML *tree, struct cYAML **show_rc,
1363                                struct cYAML **err_rc)
1364 {
1365         struct cYAML *net, *seq_no;
1366
1367         net = cYAML_get_object_item(tree, "net");
1368         seq_no = cYAML_get_object_item(tree, "seq_no");
1369
1370         return lustre_lnet_del_net((net) ? net->cy_valuestring : NULL,
1371                                    (seq_no) ? seq_no->cy_valueint : -1,
1372                                    err_rc);
1373 }
1374
1375 static int handle_yaml_del_routing(struct cYAML *tree, struct cYAML **show_rc,
1376                                    struct cYAML **err_rc)
1377 {
1378         struct cYAML *seq_no;
1379
1380         seq_no = cYAML_get_object_item(tree, "seq_no");
1381
1382         return lustre_lnet_enable_routing(0, (seq_no) ?
1383                                                 seq_no->cy_valueint : -1,
1384                                         err_rc);
1385 }
1386
1387 static int handle_yaml_show_route(struct cYAML *tree, struct cYAML **show_rc,
1388                                   struct cYAML **err_rc)
1389 {
1390         struct cYAML *net;
1391         struct cYAML *gw;
1392         struct cYAML *hop;
1393         struct cYAML *prio;
1394         struct cYAML *detail;
1395         struct cYAML *seq_no;
1396
1397         net = cYAML_get_object_item(tree, "net");
1398         gw = cYAML_get_object_item(tree, "gateway");
1399         hop = cYAML_get_object_item(tree, "hop");
1400         prio = cYAML_get_object_item(tree, "priority");
1401         detail = cYAML_get_object_item(tree, "detail");
1402         seq_no = cYAML_get_object_item(tree, "seq_no");
1403
1404         return lustre_lnet_show_route((net) ? net->cy_valuestring : NULL,
1405                                       (gw) ? gw->cy_valuestring : NULL,
1406                                       (hop) ? hop->cy_valueint : -1,
1407                                       (prio) ? prio->cy_valueint : -1,
1408                                       (detail) ? detail->cy_valueint : 0,
1409                                       (seq_no) ? seq_no->cy_valueint : -1,
1410                                       show_rc,
1411                                       err_rc);
1412 }
1413
1414 static int handle_yaml_show_net(struct cYAML *tree, struct cYAML **show_rc,
1415                                 struct cYAML **err_rc)
1416 {
1417         struct cYAML *net, *detail, *seq_no;
1418
1419         net = cYAML_get_object_item(tree, "net");
1420         detail = cYAML_get_object_item(tree, "detail");
1421         seq_no = cYAML_get_object_item(tree, "seq_no");
1422
1423         return lustre_lnet_show_net((net) ? net->cy_valuestring : NULL,
1424                                     (detail) ? detail->cy_valueint : 0,
1425                                     (seq_no) ? seq_no->cy_valueint : -1,
1426                                     show_rc,
1427                                     err_rc);
1428 }
1429
1430 static int handle_yaml_show_routing(struct cYAML *tree, struct cYAML **show_rc,
1431                                     struct cYAML **err_rc)
1432 {
1433         struct cYAML *seq_no;
1434
1435         seq_no = cYAML_get_object_item(tree, "seq_no");
1436
1437         return lustre_lnet_show_routing((seq_no) ? seq_no->cy_valueint : -1,
1438                                         show_rc, err_rc);
1439 }
1440
1441 static int handle_yaml_show_credits(struct cYAML *tree, struct cYAML **show_rc,
1442                                     struct cYAML **err_rc)
1443 {
1444         struct cYAML *seq_no;
1445
1446         seq_no = cYAML_get_object_item(tree, "seq_no");
1447
1448         return lustre_lnet_show_peer_credits((seq_no) ?
1449                                                 seq_no->cy_valueint : -1,
1450                                              show_rc, err_rc);
1451 }
1452
1453 static int handle_yaml_show_stats(struct cYAML *tree, struct cYAML **show_rc,
1454                                   struct cYAML **err_rc)
1455 {
1456         struct cYAML *seq_no;
1457
1458         seq_no = cYAML_get_object_item(tree, "seq_no");
1459
1460         return lustre_lnet_show_stats((seq_no) ? seq_no->cy_valueint : -1,
1461                                       show_rc, err_rc);
1462 }
1463
1464 struct lookup_cmd_hdlr_tbl {
1465         char *name;
1466         cmd_handler_t cb;
1467 };
1468
1469 static struct lookup_cmd_hdlr_tbl lookup_config_tbl[] = {
1470         {"route", handle_yaml_config_route},
1471         {"net", handle_yaml_config_net},
1472         {"routing", handle_yaml_config_routing},
1473         {"buffers", handle_yaml_config_buffers},
1474         {NULL, NULL}
1475 };
1476
1477 static struct lookup_cmd_hdlr_tbl lookup_del_tbl[] = {
1478         {"route", handle_yaml_del_route},
1479         {"net", handle_yaml_del_net},
1480         {"routing", handle_yaml_del_routing},
1481         {NULL, NULL}
1482 };
1483
1484 static struct lookup_cmd_hdlr_tbl lookup_show_tbl[] = {
1485         {"route", handle_yaml_show_route},
1486         {"net", handle_yaml_show_net},
1487         {"buffers", handle_yaml_show_routing},
1488         {"routing", handle_yaml_show_routing},
1489         {"credits", handle_yaml_show_credits},
1490         {"statistics", handle_yaml_show_stats},
1491         {NULL, NULL}
1492 };
1493
1494 static cmd_handler_t lookup_fn(char *key,
1495                                struct lookup_cmd_hdlr_tbl *tbl)
1496 {
1497         int i;
1498         if (key == NULL)
1499                 return NULL;
1500
1501         for (i = 0; tbl[i].name != NULL; i++) {
1502                 if (strncmp(key, tbl[i].name, strlen(tbl[i].name)) == 0)
1503                         return tbl[i].cb;
1504         }
1505
1506         return NULL;
1507 }
1508
1509 static int lustre_yaml_cb_helper(char *f, struct lookup_cmd_hdlr_tbl *table,
1510                                  struct cYAML **show_rc, struct cYAML **err_rc)
1511 {
1512         struct cYAML *tree, *item = NULL, *head, *child;
1513         cmd_handler_t cb;
1514         char err_str[LNET_MAX_STR_LEN];
1515         int rc = LUSTRE_CFG_RC_NO_ERR, return_rc = LUSTRE_CFG_RC_NO_ERR;
1516
1517         tree = cYAML_build_tree(f, NULL, 0, err_rc);
1518         if (tree == NULL)
1519                 return LUSTRE_CFG_RC_BAD_PARAM;
1520
1521         child = tree->cy_child;
1522         while (child != NULL) {
1523                 cb = lookup_fn(child->cy_string, table);
1524                 if (cb == NULL) {
1525                         snprintf(err_str, sizeof(err_str),
1526                                 "\"call back for '%s' not found\"",
1527                                 child->cy_string);
1528                         cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
1529                                         "yaml", "helper", err_str, err_rc);
1530                         goto out;
1531                 }
1532
1533                 if (cYAML_is_sequence(child)) {
1534                         while ((head = cYAML_get_next_seq_item(child, &item))
1535                                != NULL) {
1536                                 rc = cb(head, show_rc, err_rc);
1537                                 if (rc != LUSTRE_CFG_RC_NO_ERR)
1538                                         return_rc = rc;
1539                         }
1540                 } else {
1541                         rc = cb(child, show_rc, err_rc);
1542                         if (rc != LUSTRE_CFG_RC_NO_ERR)
1543                                 return_rc = rc;
1544                 }
1545                 item = NULL;
1546                 child = child->cy_next;
1547         }
1548
1549 out:
1550         cYAML_free_tree(tree);
1551
1552         return return_rc;
1553 }
1554
1555 int lustre_yaml_config(char *f, struct cYAML **err_rc)
1556 {
1557         return lustre_yaml_cb_helper(f, lookup_config_tbl,
1558                                      NULL, err_rc);
1559 }
1560
1561 int lustre_yaml_del(char *f, struct cYAML **err_rc)
1562 {
1563         return lustre_yaml_cb_helper(f, lookup_del_tbl,
1564                                      NULL, err_rc);
1565 }
1566
1567 int lustre_yaml_show(char *f, struct cYAML **show_rc, struct cYAML **err_rc)
1568 {
1569         return lustre_yaml_cb_helper(f, lookup_show_tbl,
1570                                      show_rc, err_rc);
1571 }