ceph/src/spdk/lib/event/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/conf.h"
  37 #include "spdk/env.h"
  38 #include "spdk/thread.h"
  39 #include "spdk/log.h"
  40 #include "spdk/rpc.h"
  41
  42 #include "spdk_internal/event.h"
  43
  44 #define RPC_SELECT_INTERVAL     4000 /* 4ms */
  45
  46 static struct spdk_poller *g_rpc_poller = NULL;
  47
  48 static int
  49 spdk_rpc_subsystem_poll(void *arg)
  50 {
  51         spdk_rpc_accept();
  52         return -1;
  53 }
  54
  55 void
  56 spdk_rpc_initialize(const char *listen_addr)
  57 {
  58         int rc;
  59
  60         if (listen_addr == NULL) {
  61                 return;
  62         }
  63
  64         /* Listen on the requested address */
  65         rc = spdk_rpc_listen(listen_addr);
  66         if (rc != 0) {
  67                 SPDK_ERRLOG("Unable to start RPC service at %s\n", listen_addr);
  68                 return;
  69         }
  70
  71         spdk_rpc_set_state(SPDK_RPC_STARTUP);
  72
  73         /* Register a poller to periodically check for RPCs */
  74         g_rpc_poller = spdk_poller_register(spdk_rpc_subsystem_poll, NULL, RPC_SELECT_INTERVAL);
  75 }
  76
  77 void
  78 spdk_rpc_finish(void)
  79 {
  80         spdk_rpc_close();
  81         spdk_poller_unregister(&g_rpc_poller);
  82 }