sys/compat/mach/mach_notify.c

   1 /*      $NetBSD: mach_notify.c,v 1.19 2007/12/08 18:36:15 dsl Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Emmanuel Dreyfus
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: mach_notify.c,v 1.19 2007/12/08 18:36:15 dsl Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/signal.h>
  38 #include <sys/proc.h>
  39 #include <sys/malloc.h>
  40
  41 #include <compat/mach/mach_types.h>
  42 #include <compat/mach/mach_exec.h>
  43 #include <compat/mach/mach_thread.h>
  44 #include <compat/mach/mach_notify.h>
  45 #include <compat/mach/mach_message.h>
  46 #include <compat/mach/mach_services.h>
  47
  48 void
  49 mach_notify_port_destroyed(struct lwp *l, struct mach_right *mr)
  50 {
  51         struct mach_port *mp;
  52         mach_notify_port_destroyed_request_t *req;
  53
  54         if (mr->mr_notify_destroyed == NULL)
  55                 return;
  56
  57         mp = mr->mr_notify_destroyed->mr_port;
  58
  59 #ifdef DIAGNOSTIC
  60         if ((mp == NULL) || (mp->mp_recv == NULL)) {
  61                 printf("mach_notify_port_destroyed: bad port or receiver\n");
  62                 return;
  63         }
  64 #endif
  65
  66         MACH_PORT_REF(mp);
  67
  68         req = malloc(sizeof(*req), M_EMULDATA, M_WAITOK | M_ZERO);
  69
  70         req->req_msgh.msgh_bits =
  71             MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
  72         req->req_msgh.msgh_size = sizeof(*req) - sizeof(req->req_trailer);
  73         req->req_msgh.msgh_local_port = mr->mr_notify_destroyed->mr_name;
  74         req->req_msgh.msgh_id = MACH_NOTIFY_DESTROYED_MSGID;
  75         req->req_body.msgh_descriptor_count = 1;
  76         req->req_rights.name = mr->mr_name;
  77
  78         mach_set_trailer(req, sizeof(*req));
  79
  80         (void)mach_message_get((mach_msg_header_t *)req, sizeof(*req), mp, l);
  81 #ifdef DEBUG_MACH_MSG
  82         printf("pid %d: message queued on port %p (%d) [%p]\n",
  83             l->l_proc->p_pid, mp, req->req_msgh.msgh_id,
  84             mp->mp_recv->mr_sethead);
  85 #endif
  86         wakeup(mp->mp_recv->mr_sethead);
  87
  88         MACH_PORT_UNREF(mp);
  89
  90         return;
  91 }
  92
  93 void
  94 mach_notify_port_no_senders(struct lwp *l, struct mach_right *mr)
  95 {
  96         struct mach_port *mp;
  97         mach_notify_port_no_senders_request_t *req;
  98
  99         if ((mr->mr_notify_no_senders == NULL) ||
 100             (mr->mr_notify_no_senders->mr_port == NULL))
 101                 return;
 102         mp = mr->mr_notify_no_senders->mr_port;
 103
 104 #ifdef DIAGNOSTIC
 105         if ((mp == NULL) ||
 106             (mp->mp_recv == NULL) ||
 107             (mp->mp_datatype != MACH_MP_NOTIFY_SYNC)) {
 108                 printf("mach_notify_port_no_senders: bad port or reciever\n");
 109                 return;
 110         }
 111 #endif
 112         MACH_PORT_REF(mp);
 113         if ((int)mp->mp_data >= mr->mr_refcount)
 114                 goto out;
 115
 116         req = malloc(sizeof(*req), M_EMULDATA, M_WAITOK | M_ZERO);
 117
 118         req->req_msgh.msgh_bits =
 119             MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
 120         req->req_msgh.msgh_size = sizeof(*req) - sizeof(req->req_trailer);
 121         req->req_msgh.msgh_local_port = mr->mr_notify_no_senders->mr_name;
 122         req->req_msgh.msgh_id = MACH_NOTIFY_NO_SENDERS_MSGID;
 123         req->req_mscount = mr->mr_refcount;
 124
 125         mach_set_trailer(req, sizeof(*req));
 126
 127         (void)mach_message_get((mach_msg_header_t *)req, sizeof(*req), mp, l);
 128 #ifdef DEBUG_MACH_MSG
 129         printf("pid %d: message queued on port %p (%d) [%p]\n",
 130             l->l_proc->p_pid, mp, req->req_msgh.msgh_id,
 131             mp->mp_recv->mr_sethead);
 132 #endif
 133         wakeup(mp->mp_recv->mr_sethead);
 134
 135 out:
 136         MACH_PORT_UNREF(mp);
 137         return;
 138 }
 139
 140 void
 141 mach_notify_port_dead_name(struct lwp *l, struct mach_right *mr)
 142 {
 143         struct mach_port *mp;
 144         mach_notify_port_dead_name_request_t *req;
 145
 146         if ((mr->mr_notify_dead_name == NULL) ||
 147             (mr->mr_notify_dead_name->mr_port == NULL))
 148                 return;
 149         mp = mr->mr_notify_dead_name->mr_port;
 150
 151 #ifdef DIAGNOSTIC
 152         if ((mp == NULL) || (mp->mp_recv)) {
 153                 printf("mach_notify_port_dead_name: bad port or reciever\n");
 154                 return;
 155         }
 156 #endif
 157         MACH_PORT_REF(mp);
 158
 159         req = malloc(sizeof(*req), M_EMULDATA, M_WAITOK | M_ZERO);
 160
 161         req->req_msgh.msgh_bits =
 162             MACH_MSGH_REPLY_LOCAL_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE);
 163         req->req_msgh.msgh_size = sizeof(*req) - sizeof(req->req_trailer);
 164         req->req_msgh.msgh_local_port = mr->mr_notify_dead_name->mr_name;
 165         req->req_msgh.msgh_id = MACH_NOTIFY_DEAD_NAME_MSGID;
 166         req->req_name = mr->mr_name;
 167
 168         mach_set_trailer(req, sizeof(*req));
 169
 170         mr->mr_refcount++;
 171
 172         (void)mach_message_get((mach_msg_header_t *)req, sizeof(*req), mp, l);
 173 #ifdef DEBUG_MACH_MSG
 174         printf("pid %d: message queued on port %p (%d) [%p]\n",
 175             l->l_proc->p_pid, mp, req->req_msgh.msgh_id,
 176             mp->mp_recv->mr_sethead);
 177 #endif
 178         wakeup(mp->mp_recv->mr_sethead);
 179         MACH_PORT_UNREF(mp);
 180
 181         return;
 182 }