src/test/test-btrfs.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <fcntl.h>
  23
  24 #include "log.h"
  25 #include "fileio.h"
  26 #include "util.h"
  27 #include "btrfs-util.h"
  28
  29 int main(int argc, char *argv[]) {
  30         int r, fd;
  31
  32         fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  33         if (fd < 0)
  34                 log_error_errno(errno, "Failed to open root directory: %m");
  35         else {
  36                 BtrfsSubvolInfo info;
  37                 BtrfsQuotaInfo quota;
  38                 char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX];
  39
  40                 r = btrfs_subvol_get_info_fd(fd, &info);
  41                 if (r < 0)
  42                         log_error_errno(r, "Failed to get subvolume info: %m");
  43                 else {
  44                         log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime));
  45                         log_info("read-only (search): %s", yes_no(info.read_only));
  46                 }
  47
  48                 r = btrfs_subvol_get_quota_fd(fd, &quota);
  49                 if (r < 0)
  50                         log_error_errno(r, "Failed to get quota info: %m");
  51                 else {
  52                         log_info("referenced: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced)));
  53                         log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive)));
  54                         log_info("referenced_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced_max)));
  55                         log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max)));
  56                 }
  57
  58                 r = btrfs_subvol_get_read_only_fd(fd);
  59                 if (r < 0)
  60                         log_error_errno(r, "Failed to get read only flag: %m");
  61                 else
  62                         log_info("read-only (ioctl): %s", yes_no(r));
  63
  64                 safe_close(fd);
  65         }
  66
  67         r = btrfs_subvol_make("/xxxtest");
  68         if (r < 0)
  69                 log_error_errno(r, "Failed to make subvolume: %m");
  70
  71         r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha");
  72         if (r < 0)
  73                 log_error_errno(r, "Failed to write file: %m");
  74
  75         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", 0);
  76         if (r < 0)
  77                 log_error_errno(r, "Failed to make snapshot: %m");
  78
  79         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", BTRFS_SNAPSHOT_READ_ONLY);
  80         if (r < 0)
  81                 log_error_errno(r, "Failed to make snapshot: %m");
  82
  83         r = btrfs_subvol_remove("/xxxtest", false);
  84         if (r < 0)
  85                 log_error_errno(r, "Failed to remove subvolume: %m");
  86
  87         r = btrfs_subvol_remove("/xxxtest2", false);
  88         if (r < 0)
  89                 log_error_errno(r, "Failed to remove subvolume: %m");
  90
  91         r = btrfs_subvol_remove("/xxxtest3", false);
  92         if (r < 0)
  93                 log_error_errno(r, "Failed to remove subvolume: %m");
  94
  95         r = btrfs_subvol_snapshot("/etc", "/etc2", BTRFS_SNAPSHOT_READ_ONLY|BTRFS_SNAPSHOT_FALLBACK_COPY);
  96         if (r < 0)
  97                 log_error_errno(r, "Failed to make snapshot: %m");
  98
  99         r = btrfs_subvol_remove("/etc2", false);
 100         if (r < 0)
 101                 log_error_errno(r, "Failed to remove subvolume: %m");
 102
 103         r = btrfs_subvol_make("/xxxrectest");
 104         if (r < 0)
 105                 log_error_errno(r, "Failed to make subvolume: %m");
 106
 107         r = btrfs_subvol_make("/xxxrectest/xxxrectest2");
 108         if (r < 0)
 109                 log_error_errno(r, "Failed to make subvolume: %m");
 110
 111         r = btrfs_subvol_make("/xxxrectest/xxxrectest3");
 112         if (r < 0)
 113                 log_error_errno(r, "Failed to make subvolume: %m");
 114
 115         r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub");
 116         if (r < 0)
 117                 log_error_errno(r, "Failed to make subvolume: %m");
 118
 119         if (mkdir("/xxxrectest/dir", 0755) < 0)
 120                 log_error_errno(errno, "Failed to make directory: %m");
 121
 122         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4");
 123         if (r < 0)
 124                 log_error_errno(r, "Failed to make subvolume: %m");
 125
 126         if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0)
 127                 log_error_errno(errno, "Failed to make directory: %m");
 128
 129         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5");
 130         if (r < 0)
 131                 log_error_errno(r, "Failed to make subvolume: %m");
 132
 133         if (mkdir("/xxxrectest/mnt", 0755) < 0)
 134                 log_error_errno(errno, "Failed to make directory: %m");
 135
 136         r = btrfs_subvol_snapshot("/xxxrectest", "/xxxrectest2", BTRFS_SNAPSHOT_RECURSIVE);
 137         if (r < 0)
 138                 log_error_errno(r, "Failed to snapshot subvolume: %m");
 139
 140         r = btrfs_subvol_remove("/xxxrectest", true);
 141         if (r < 0)
 142                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 143
 144         r = btrfs_subvol_remove("/xxxrectest2", true);
 145         if (r < 0)
 146                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 147
 148         return 0;
 149 }