ceph/src/spdk/lib/event/rpc/subsystem_rpc.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) Intel Corporation.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "spdk_internal/event.h"
  35 #include "spdk/rpc.h"
  36 #include "spdk/string.h"
  37 #include "spdk/util.h"
  38 #include "spdk/env.h"
  39
  40 static void
  41 spdk_rpc_get_subsystems(struct spdk_jsonrpc_request *request,
  42                         const struct spdk_json_val *params)
  43 {
  44         struct spdk_json_write_ctx *w;
  45         struct spdk_subsystem *subsystem;
  46         struct spdk_subsystem_depend *deps;
  47
  48         if (params) {
  49                 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
  50                                                  "'get_subsystems' requires no arguments");
  51                 return;
  52         }
  53
  54         w = spdk_jsonrpc_begin_result(request);
  55         if (w == NULL) {
  56                 return;
  57         }
  58
  59         spdk_json_write_array_begin(w);
  60         TAILQ_FOREACH(subsystem, &g_subsystems, tailq) {
  61                 spdk_json_write_object_begin(w);
  62
  63                 spdk_json_write_named_string(w, "subsystem", subsystem->name);
  64                 spdk_json_write_named_array_begin(w, "depends_on");
  65                 TAILQ_FOREACH(deps, &g_subsystems_deps, tailq) {
  66                         if (strcmp(subsystem->name, deps->name) == 0) {
  67                                 spdk_json_write_string(w, deps->depends_on);
  68                         }
  69                 }
  70                 spdk_json_write_array_end(w);
  71
  72                 spdk_json_write_object_end(w);
  73         }
  74         spdk_json_write_array_end(w);
  75         spdk_jsonrpc_end_result(request, w);
  76 }
  77
  78 SPDK_RPC_REGISTER("get_subsystems", spdk_rpc_get_subsystems, SPDK_RPC_RUNTIME)
  79
  80 struct rpc_get_subsystem_config {
  81         char *name;
  82 };
  83
  84 static const struct spdk_json_object_decoder rpc_get_subsystem_config[] = {
  85         {"name", offsetof(struct rpc_get_subsystem_config, name), spdk_json_decode_string},
  86 };
  87
  88 static void
  89 spdk_rpc_get_subsystem_config(struct spdk_jsonrpc_request *request,
  90                               const struct spdk_json_val *params)
  91 {
  92         struct rpc_get_subsystem_config req = {};
  93         struct spdk_json_write_ctx *w;
  94         struct spdk_subsystem *subsystem;
  95
  96         if (spdk_json_decode_object(params, rpc_get_subsystem_config,
  97                                     SPDK_COUNTOF(rpc_get_subsystem_config), &req)) {
  98                 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid arguments");
  99                 return;
 100         }
 101
 102         subsystem = spdk_subsystem_find(&g_subsystems, req.name);
 103         if (!subsystem) {
 104                 spdk_jsonrpc_send_error_response_fmt(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
 105                                                      "Subsystem '%s' not found", req.name);
 106                 free(req.name);
 107                 return;
 108         }
 109
 110         free(req.name);
 111
 112         w = spdk_jsonrpc_begin_result(request);
 113         if (w) {
 114                 spdk_subsystem_config_json(w, subsystem);
 115                 spdk_jsonrpc_end_result(request, w);
 116         }
 117 }
 118
 119 SPDK_RPC_REGISTER("get_subsystem_config", spdk_rpc_get_subsystem_config, SPDK_RPC_RUNTIME)