ceph/src/spdk/lib/event/rpc/app_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/stdinc.h"
  35
  36 #include "spdk/event.h"
  37 #include "spdk/rpc.h"
  38 #include "spdk/string.h"
  39 #include "spdk/util.h"
  40
  41 #include "spdk_internal/log.h"
  42
  43 struct rpc_kill_instance {
  44         char *sig_name;
  45 };
  46
  47 static void
  48 free_rpc_kill_instance(struct rpc_kill_instance *req)
  49 {
  50         free(req->sig_name);
  51 }
  52
  53 static const struct spdk_json_object_decoder rpc_kill_instance_decoders[] = {
  54         {"sig_name", offsetof(struct rpc_kill_instance, sig_name), spdk_json_decode_string},
  55 };
  56
  57 static void
  58 spdk_rpc_kill_instance(struct spdk_jsonrpc_request *request,
  59                        const struct spdk_json_val *params)
  60 {
  61         static const struct {
  62                 const char      *signal_string;
  63                 int32_t         signal;
  64         } signals[] = {
  65                 {"SIGINT",      SIGINT},
  66                 {"SIGTERM",     SIGTERM},
  67                 {"SIGQUIT",     SIGQUIT},
  68                 {"SIGHUP",      SIGHUP},
  69                 {"SIGKILL",     SIGKILL},
  70         };
  71         size_t i, sig_count;
  72         int signal;
  73         struct rpc_kill_instance req = {};
  74         struct spdk_json_write_ctx *w;
  75
  76         if (spdk_json_decode_object(params, rpc_kill_instance_decoders,
  77                                     SPDK_COUNTOF(rpc_kill_instance_decoders),
  78                                     &req)) {
  79                 SPDK_DEBUGLOG(SPDK_LOG_REACTOR, "spdk_json_decode_object failed\n");
  80                 goto invalid;
  81         }
  82
  83         sig_count = SPDK_COUNTOF(signals);
  84         signal = spdk_strtol(req.sig_name, 10);
  85         for (i = 0 ; i < sig_count; i++) {
  86                 if (strcmp(req.sig_name, signals[i].signal_string) == 0 ||
  87                     signal == signals[i].signal) {
  88                         break;
  89                 }
  90         }
  91
  92         if (i == sig_count) {
  93                 goto invalid;
  94         }
  95
  96         SPDK_DEBUGLOG(SPDK_LOG_REACTOR, "sending signal %d\n", signals[i].signal);
  97         free_rpc_kill_instance(&req);
  98         kill(getpid(), signals[i].signal);
  99
 100         w = spdk_jsonrpc_begin_result(request);
 101         if (w == NULL) {
 102                 return;
 103         }
 104         spdk_json_write_bool(w, true);
 105         spdk_jsonrpc_end_result(request, w);
 106         return;
 107
 108 invalid:
 109         spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
 110         free_rpc_kill_instance(&req);
 111 }
 112 SPDK_RPC_REGISTER("kill_instance", spdk_rpc_kill_instance, SPDK_RPC_RUNTIME)
 113
 114
 115 struct rpc_context_switch_monitor {
 116         bool enabled;
 117 };
 118
 119 static const struct spdk_json_object_decoder rpc_context_switch_monitor_decoders[] = {
 120         {"enabled", offsetof(struct rpc_context_switch_monitor, enabled), spdk_json_decode_bool},
 121 };
 122
 123 static void
 124 spdk_rpc_context_switch_monitor(struct spdk_jsonrpc_request *request,
 125                                 const struct spdk_json_val *params)
 126 {
 127         struct rpc_context_switch_monitor req = {};
 128         struct spdk_json_write_ctx *w;
 129
 130         if (params != NULL) {
 131                 if (spdk_json_decode_object(params, rpc_context_switch_monitor_decoders,
 132                                             SPDK_COUNTOF(rpc_context_switch_monitor_decoders),
 133                                             &req)) {
 134                         SPDK_DEBUGLOG(SPDK_LOG_REACTOR, "spdk_json_decode_object failed\n");
 135                         spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
 136                         return;
 137                 }
 138
 139                 spdk_reactor_enable_context_switch_monitor(req.enabled);
 140         }
 141
 142         w = spdk_jsonrpc_begin_result(request);
 143         if (w == NULL) {
 144                 return;
 145         }
 146
 147         spdk_json_write_object_begin(w);
 148
 149         spdk_json_write_named_bool(w, "enabled", spdk_reactor_context_switch_monitor_enabled());
 150
 151         spdk_json_write_object_end(w);
 152         spdk_jsonrpc_end_result(request, w);
 153 }
 154
 155 SPDK_RPC_REGISTER("context_switch_monitor", spdk_rpc_context_switch_monitor, SPDK_RPC_RUNTIME)