LCOV - code coverage report
Current view: top level - drivers - tapdisk-storage.c (source / functions) Coverage Total Hit
Test: coverage.info Lines: 0.0 % 37 0
Test Date: 2026-06-26 00:00:00 Functions: 0.0 % 3 0
Branches: 0.0 % 16 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 <errno.h>
      36                 :             : #include <limits.h>
      37                 :             : #include <stdlib.h>
      38                 :             : #include <sys/stat.h>
      39                 :             : #include <sys/vfs.h>
      40                 :             : 
      41                 :             : #include "tapdisk-storage.h"
      42                 :             : 
      43                 :             : #ifndef NFS_SUPER_MAGIC
      44                 :             : #define NFS_SUPER_MAGIC 0x6969
      45                 :             : #endif
      46                 :             : 
      47                 :             : static int
      48                 :           0 : __tapdisk_fs_storage_type(const char *rpath)
      49                 :             : {
      50                 :           0 :         struct statfs fst;
      51                 :           0 :         int type, err;
      52                 :             : 
      53                 :           0 :         err = statfs(rpath, &fst);
      54         [ #  # ]:           0 :         if (err)
      55                 :           0 :                 return -errno;
      56                 :             : 
      57         [ #  # ]:           0 :         switch (fst.f_type) {
      58                 :             :         case NFS_SUPER_MAGIC:
      59                 :             :                 type = TAPDISK_STORAGE_TYPE_NFS;
      60                 :             :                 break;
      61                 :           0 :         default:
      62                 :           0 :                 type = TAPDISK_STORAGE_TYPE_EXT;
      63                 :           0 :                 break;
      64                 :             :         }
      65                 :             : 
      66                 :             :         return type;
      67                 :             : }
      68                 :             : 
      69                 :             : static int
      70                 :             : __tapdisk_blk_storage_type(const char *rpath)
      71                 :             : {
      72                 :             :         return TAPDISK_STORAGE_TYPE_LVM;
      73                 :             : }
      74                 :             : 
      75                 :             : int
      76                 :           0 : tapdisk_storage_type(const char *path)
      77                 :             : {
      78                 :           0 :         char rpath[PATH_MAX], *p;
      79                 :           0 :         struct stat st;
      80                 :           0 :         int err, rv;
      81                 :             : 
      82                 :           0 :         p = realpath(path, rpath);
      83         [ #  # ]:           0 :         if (!p)
      84                 :           0 :                 return -errno;
      85                 :             : 
      86                 :           0 :         err = stat(rpath, &st);
      87         [ #  # ]:           0 :         if (err)
      88                 :           0 :                 return -errno;
      89                 :             : 
      90      [ #  #  # ]:           0 :         switch (st.st_mode & S_IFMT) {
      91                 :             :         case S_IFBLK:
      92                 :             :                 rv = __tapdisk_blk_storage_type(rpath);
      93                 :             :                 break;
      94                 :           0 :         case S_IFREG:
      95                 :           0 :                 rv = __tapdisk_fs_storage_type(rpath);
      96                 :           0 :                 break;
      97                 :           0 :         default:
      98                 :           0 :                 rv = -EINVAL;
      99                 :           0 :                 break;
     100                 :             :         }
     101                 :             : 
     102                 :             :         return rv;
     103                 :             : }
     104                 :             : 
     105                 :             : const char *
     106                 :           0 : tapdisk_storage_name(int type)
     107                 :             : {
     108   [ #  #  #  #  :           0 :         switch (type) {
                      # ]
     109                 :             :         case TAPDISK_STORAGE_TYPE_NFS:
     110                 :             :                 return "nfs";
     111                 :           0 :         case TAPDISK_STORAGE_TYPE_EXT:
     112                 :           0 :                 return "ext";
     113                 :           0 :         case TAPDISK_STORAGE_TYPE_LVM:
     114                 :           0 :                 return "lvm";
     115                 :           0 :         case -1:
     116                 :           0 :                 return "n/a";
     117                 :           0 :         default:
     118                 :           0 :                 return "<unknown-type>";
     119                 :             :         }
     120                 :             : }
        

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