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 "btrfs-util.h"
  25 #include "fd-util.h"
  26 #include "fileio.h"
  27 #include "log.h"
  28 #include "parse-util.h"
  29 #include "string-util.h"
  30 #include "util.h"
  31
  32 int main(int argc, char *argv[]) {
  33         BtrfsQuotaInfo quota;
  34         int r, fd;
  35
  36         fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  37         if (fd < 0)
  38                 log_error_errno(errno, "Failed to open root directory: %m");
  39         else {
  40                 char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX];
  41                 BtrfsSubvolInfo info;
  42
  43                 r = btrfs_subvol_get_info_fd(fd, 0, &info);
  44                 if (r < 0)
  45                         log_error_errno(r, "Failed to get subvolume info: %m");
  46                 else {
  47                         log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime));
  48                         log_info("read-only (search): %s", yes_no(info.read_only));
  49                 }
  50
  51                 r = btrfs_qgroup_get_quota_fd(fd, 0, &quota);
  52                 if (r < 0)
  53                         log_error_errno(r, "Failed to get quota info: %m");
  54                 else {
  55                         log_info("referenced: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced)));
  56                         log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive)));
  57                         log_info("referenced_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced_max)));
  58                         log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max)));
  59                 }
  60
  61                 r = btrfs_subvol_get_read_only_fd(fd);
  62                 if (r < 0)
  63                         log_error_errno(r, "Failed to get read only flag: %m");
  64                 else
  65                         log_info("read-only (ioctl): %s", yes_no(r));
  66
  67                 safe_close(fd);
  68         }
  69
  70         r = btrfs_subvol_make("/xxxtest");
  71         if (r < 0)
  72                 log_error_errno(r, "Failed to make subvolume: %m");
  73
  74         r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha", WRITE_STRING_FILE_CREATE);
  75         if (r < 0)
  76                 log_error_errno(r, "Failed to write file: %m");
  77
  78         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", 0);
  79         if (r < 0)
  80                 log_error_errno(r, "Failed to make snapshot: %m");
  81
  82         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", BTRFS_SNAPSHOT_READ_ONLY);
  83         if (r < 0)
  84                 log_error_errno(r, "Failed to make snapshot: %m");
  85
  86         r = btrfs_subvol_remove("/xxxtest", BTRFS_REMOVE_QUOTA);
  87         if (r < 0)
  88                 log_error_errno(r, "Failed to remove subvolume: %m");
  89
  90         r = btrfs_subvol_remove("/xxxtest2", BTRFS_REMOVE_QUOTA);
  91         if (r < 0)
  92                 log_error_errno(r, "Failed to remove subvolume: %m");
  93
  94         r = btrfs_subvol_remove("/xxxtest3", BTRFS_REMOVE_QUOTA);
  95         if (r < 0)
  96                 log_error_errno(r, "Failed to remove subvolume: %m");
  97
  98         r = btrfs_subvol_snapshot("/etc", "/etc2", BTRFS_SNAPSHOT_READ_ONLY|BTRFS_SNAPSHOT_FALLBACK_COPY);
  99         if (r < 0)
 100                 log_error_errno(r, "Failed to make snapshot: %m");
 101
 102         r = btrfs_subvol_remove("/etc2", BTRFS_REMOVE_QUOTA);
 103         if (r < 0)
 104                 log_error_errno(r, "Failed to remove subvolume: %m");
 105
 106         r = btrfs_subvol_make("/xxxrectest");
 107         if (r < 0)
 108                 log_error_errno(r, "Failed to make subvolume: %m");
 109
 110         r = btrfs_subvol_make("/xxxrectest/xxxrectest2");
 111         if (r < 0)
 112                 log_error_errno(r, "Failed to make subvolume: %m");
 113
 114         r = btrfs_subvol_make("/xxxrectest/xxxrectest3");
 115         if (r < 0)
 116                 log_error_errno(r, "Failed to make subvolume: %m");
 117
 118         r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub");
 119         if (r < 0)
 120                 log_error_errno(r, "Failed to make subvolume: %m");
 121
 122         if (mkdir("/xxxrectest/dir", 0755) < 0)
 123                 log_error_errno(errno, "Failed to make directory: %m");
 124
 125         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4");
 126         if (r < 0)
 127                 log_error_errno(r, "Failed to make subvolume: %m");
 128
 129         if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0)
 130                 log_error_errno(errno, "Failed to make directory: %m");
 131
 132         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5");
 133         if (r < 0)
 134                 log_error_errno(r, "Failed to make subvolume: %m");
 135
 136         if (mkdir("/xxxrectest/mnt", 0755) < 0)
 137                 log_error_errno(errno, "Failed to make directory: %m");
 138
 139         r = btrfs_subvol_snapshot("/xxxrectest", "/xxxrectest2", BTRFS_SNAPSHOT_RECURSIVE);
 140         if (r < 0)
 141                 log_error_errno(r, "Failed to snapshot subvolume: %m");
 142
 143         r = btrfs_subvol_remove("/xxxrectest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 144         if (r < 0)
 145                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 146
 147         r = btrfs_subvol_remove("/xxxrectest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 148         if (r < 0)
 149                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 150
 151         r = btrfs_subvol_make("/xxxquotatest");
 152         if (r < 0)
 153                 log_error_errno(r, "Failed to make subvolume: %m");
 154
 155         r = btrfs_subvol_auto_qgroup("/xxxquotatest", 0, true);
 156         if (r < 0)
 157                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 158
 159         r = btrfs_subvol_make("/xxxquotatest/beneath");
 160         if (r < 0)
 161                 log_error_errno(r, "Failed to make subvolume: %m");
 162
 163         r = btrfs_subvol_auto_qgroup("/xxxquotatest/beneath", 0, false);
 164         if (r < 0)
 165                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 166
 167         r = btrfs_qgroup_set_limit("/xxxquotatest/beneath", 0, 4ULL * 1024 * 1024 * 1024);
 168         if (r < 0)
 169                 log_error_errno(r, "Failed to set up quota limit: %m");
 170
 171         r = btrfs_subvol_set_subtree_quota_limit("/xxxquotatest", 0, 5ULL * 1024 * 1024 * 1024);
 172         if (r < 0)
 173                 log_error_errno(r, "Failed to set up quota limit: %m");
 174
 175         r = btrfs_subvol_snapshot("/xxxquotatest", "/xxxquotatest2", BTRFS_SNAPSHOT_RECURSIVE|BTRFS_SNAPSHOT_QUOTA);
 176         if (r < 0)
 177                 log_error_errno(r, "Failed to setup snapshot: %m");
 178
 179         r = btrfs_qgroup_get_quota("/xxxquotatest2/beneath", 0, &quota);
 180         if (r < 0)
 181                 log_error_errno(r, "Failed to query quota: %m");
 182
 183         assert_se(quota.referenced_max == 4ULL * 1024 * 1024 * 1024);
 184
 185         r = btrfs_subvol_get_subtree_quota("/xxxquotatest2", 0, &quota);
 186         if (r < 0)
 187                 log_error_errno(r, "Failed to query quota: %m");
 188
 189         assert_se(quota.referenced_max == 5ULL * 1024 * 1024 * 1024);
 190
 191         r = btrfs_subvol_remove("/xxxquotatest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 192         if (r < 0)
 193                 log_error_errno(r, "Failed remove subvolume: %m");
 194
 195         r = btrfs_subvol_remove("/xxxquotatest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 196         if (r < 0)
 197                 log_error_errno(r, "Failed remove subvolume: %m");
 198
 199         return 0;
 200 }