LCOV - code coverage report
Current view: top level - control - tap-ctl-check.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 17 0.0 %
Date: 2025-03-07 10:41:45 Functions: 0 2 0.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       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                 :            : #ifdef HAVE_CONFIG_H
      32                 :            : #include "config.h"
      33                 :            : #endif
      34                 :            : 
      35                 :            : #include <stdio.h>
      36                 :            : #include <errno.h>
      37                 :            : #include <unistd.h>
      38                 :            : #include <string.h>
      39                 :            : 
      40                 :            : #include "tap-ctl.h"
      41                 :            : #include "blktap2.h"
      42                 :            : 
      43                 :            : int
      44                 :          0 : tap_ctl_check_blktap(const char **msg)
      45                 :            : {
      46                 :            :         FILE *f;
      47                 :          0 :         int err = 0, minor;
      48                 :            :         char name[33];
      49                 :            : 
      50                 :            :         memset(name, 0, sizeof(name));
      51                 :            : 
      52                 :          0 :         f = fopen("/proc/misc", "r");
      53                 :          0 :         if (!f) {
      54                 :          0 :                 *msg = "failed to open /proc/misc";
      55                 :          0 :                 return -errno;
      56                 :            :         }
      57                 :            : 
      58                 :          0 :         while (fscanf(f, "%d %32s", &minor, name) == 2) {
      59                 :          0 :                 if (!strcmp(name, BLKTAP2_CONTROL_NAME))
      60                 :            :                         goto out;
      61                 :            :         }
      62                 :            : 
      63                 :          0 :         err = -ENOSYS;
      64                 :          0 :         *msg = "blktap kernel module not installed";
      65                 :            : 
      66                 :            : out:
      67                 :          0 :         fclose(f);
      68                 :            :         return err;
      69                 :            : }
      70                 :            : 
      71                 :            : int
      72                 :          0 : tap_ctl_check(const char **msg)
      73                 :            : {
      74                 :            :         int err;
      75                 :            : 
      76                 :          0 :         err = tap_ctl_check_blktap(msg);
      77                 :          0 :         if (err)
      78                 :            :                 goto out;
      79                 :            : 
      80                 :          0 :         err  = 0;
      81                 :          0 :         *msg = "ok";
      82                 :            : 
      83                 :            : out:
      84                 :          0 :         return err;
      85                 :            : }

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