ceph/src/spdk/lib/iscsi/acceptor.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
   5  *   Copyright (c) Intel Corporation.
   6  *   All rights reserved.
   7  *
   8  *   Redistribution and use in source and binary forms, with or without
   9  *   modification, are permitted provided that the following conditions
  10  *   are met:
  11  *
  12  *     * Redistributions of source code must retain the above copyright
  13  *       notice, this list of conditions and the following disclaimer.
  14  *     * Redistributions in binary form must reproduce the above copyright
  15  *       notice, this list of conditions and the following disclaimer in
  16  *       the documentation and/or other materials provided with the
  17  *       distribution.
  18  *     * Neither the name of Intel Corporation nor the names of its
  19  *       contributors may be used to endorse or promote products derived
  20  *       from this software without specific prior written permission.
  21  *
  22  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  26  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  28  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  32  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include "spdk/stdinc.h"
  36
  37 #include "spdk/env.h"
  38 #include "spdk/thread.h"
  39 #include "spdk/log.h"
  40 #include "spdk/sock.h"
  41 #include "spdk/string.h"
  42 #include "iscsi/acceptor.h"
  43 #include "iscsi/conn.h"
  44 #include "iscsi/portal_grp.h"
  45
  46 #define ACCEPT_TIMEOUT_US 1000 /* 1ms */
  47
  48 static int
  49 spdk_iscsi_portal_accept(void *arg)
  50 {
  51         struct spdk_iscsi_portal        *portal = arg;
  52         struct spdk_sock                *sock;
  53         int                             rc;
  54         int                             count = 0;
  55
  56         if (portal->sock == NULL) {
  57                 return -1;
  58         }
  59
  60         while (1) {
  61                 sock = spdk_sock_accept(portal->sock);
  62                 if (sock != NULL) {
  63                         rc = spdk_iscsi_conn_construct(portal, sock);
  64                         if (rc < 0) {
  65                                 spdk_sock_close(&sock);
  66                                 SPDK_ERRLOG("spdk_iscsi_connection_construct() failed\n");
  67                                 break;
  68                         }
  69                         count++;
  70                 } else {
  71                         if (errno != EAGAIN && errno != EWOULDBLOCK) {
  72                                 SPDK_ERRLOG("accept error(%d): %s\n", errno, spdk_strerror(errno));
  73                         }
  74                         break;
  75                 }
  76         }
  77
  78         return count;
  79 }
  80
  81 void
  82 spdk_iscsi_acceptor_start(struct spdk_iscsi_portal *p)
  83 {
  84         p->acceptor_poller = spdk_poller_register(spdk_iscsi_portal_accept, p, ACCEPT_TIMEOUT_US);
  85 }
  86
  87 void
  88 spdk_iscsi_acceptor_stop(struct spdk_iscsi_portal *p)
  89 {
  90         spdk_poller_unregister(&p->acceptor_poller);
  91 }