LCOV - code coverage report
Current view: top level - drivers - tapdisk-storage.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 29 0.0 %
Date: 2025-01-09 17:56:42 Functions: 0 4 0.0 %
Branches: 0 16 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 <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                 :            :         struct statfs fst;
      51                 :            :         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                 :            :         default:
      62                 :          0 :                 type = TAPDISK_STORAGE_TYPE_EXT;
      63                 :          0 :                 break;
      64                 :            :         }
      65                 :            : 
      66                 :          0 :         return type;
      67                 :            : }
      68                 :            : 
      69                 :            : static int
      70                 :          0 : __tapdisk_blk_storage_type(const char *rpath)
      71                 :            : {
      72                 :          0 :         return TAPDISK_STORAGE_TYPE_LVM;
      73                 :            : }
      74                 :            : 
      75                 :            : int
      76                 :          0 : tapdisk_storage_type(const char *path)
      77                 :            : {
      78                 :            :         char rpath[PATH_MAX], *p;
      79                 :            :         struct stat st;
      80                 :            :         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                 :            :         case S_IFREG:
      95                 :          0 :                 rv = __tapdisk_fs_storage_type(rpath);
      96                 :          0 :                 break;
      97                 :            :         default:
      98                 :          0 :                 rv = -EINVAL;
      99                 :          0 :                 break;
     100                 :            :         }
     101                 :            : 
     102                 :          0 :         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                 :            :         case TAPDISK_STORAGE_TYPE_EXT:
     112                 :          0 :                 return "ext";
     113                 :            :         case TAPDISK_STORAGE_TYPE_LVM:
     114                 :          0 :                 return "lvm";
     115                 :            :         case -1:
     116                 :          0 :                 return "n/a";
     117                 :            :         default:
     118                 :          0 :                 return "<unknown-type>";
     119                 :            :         }
     120                 :            : }

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