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       1                 :             : /*
       2                 :             :  * Copyright (c) 2016, Citrix Systems, Inc.
       3                 :             :  *
       4                 :             :  * All rights reserved.
       5                 :             :  *
       6                 :             :  * Redistribution and use in source and binary forms, with or without
       7                 :             :  * modification, are permitted provided that the following conditions are met:
       8                 :             :  * 
       9                 :             :  *  1. Redistributions of source code must retain the above copyright
      10                 :             :  *     notice, this list of conditions and the following disclaimer.
      11                 :             :  *  2. Redistributions in binary form must reproduce the above copyright
      12                 :             :  *     notice, this list of conditions and the following disclaimer in the
      13                 :             :  *     documentation and/or other materials provided with the distribution.
      14                 :             :  *  3. Neither the name of the copyright holder nor the names of its 
      15                 :             :  *     contributors may be used to endorse or promote products derived from 
      16                 :             :  *     this software without specific prior written permission.
      17                 :             :  *
      18                 :             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      19                 :             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      20                 :             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      21                 :             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
      22                 :             :  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      23                 :             :  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      24                 :             :  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
      25                 :             :  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
      26                 :             :  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
      27                 :             :  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      28                 :             :  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      29                 :             :  */
      30                 :             : 
      31                 :             : #include <stdio.h>
      32                 :             : #include <stdlib.h>
      33                 :             : #include <string.h>
      34                 :             : 
      35                 :             : #include "debug.h"
      36                 :             : #include "tap-ctl.h"
      37                 :             : 
      38                 :           0 : int tap_ctl_info(pid_t pid, unsigned long long *sectors,
      39                 :             :                 unsigned int *sector_size, unsigned int *info, const int minor)
      40                 :             : {
      41                 :           0 :     tapdisk_message_t message;
      42                 :           0 :     int err;
      43                 :             : 
      44         [ #  # ]:           0 :     ASSERT(sectors);
      45         [ #  # ]:           0 :     ASSERT(sector_size);
      46         [ #  # ]:           0 :     ASSERT(info);
      47                 :             : 
      48                 :           0 :     memset(&message, 0, sizeof(message));
      49                 :           0 :     message.type = TAPDISK_MESSAGE_DISK_INFO;
      50                 :           0 :         message.cookie = minor;
      51                 :             : 
      52                 :           0 :     err = tap_ctl_connect_send_and_receive(pid, &message, NULL);
      53         [ #  # ]:           0 :     if (err) {
      54                 :           0 :         EPRINTF("failed to get info from tapdisk %d: %s\n", pid,
      55                 :             :                 strerror(-err));
      56                 :           0 :         return err;
      57                 :             :     }
      58                 :             : 
      59         [ #  # ]:           0 :     if (TAPDISK_MESSAGE_DISK_INFO_RSP == message.type) {
      60                 :           0 :         *sectors = message.u.image.sectors;
      61                 :           0 :         *sector_size = message.u.image.sector_size;
      62                 :           0 :         *info = message.u.image.info;
      63                 :           0 :         return 0;
      64         [ #  # ]:           0 :     } else if (TAPDISK_MESSAGE_ERROR == message.type) {
      65                 :           0 :        return -message.u.response.error;
      66                 :             :     } else {
      67                 :           0 :         EPRINTF("unexpected reply %d\n", message.type);
      68                 :           0 :         return -EINVAL;
      69                 :             :     }
      70                 :             : }