src/test/test-btrfs.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2014 Lennart Poettering
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include <fcntl.h>
  22
  23 #include "btrfs-util.h"
  24 #include "fd-util.h"
  25 #include "fileio.h"
  26 #include "log.h"
  27 #include "parse-util.h"
  28 #include "string-util.h"
  29 #include "util.h"
  30
  31 int main(int argc, char *argv[]) {
  32         BtrfsQuotaInfo quota;
  33         int r, fd;
  34
  35         fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  36         if (fd < 0)
  37                 log_error_errno(errno, "Failed to open root directory: %m");
  38         else {
  39                 char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX];
  40                 BtrfsSubvolInfo info;
  41
  42                 r = btrfs_subvol_get_info_fd(fd, 0, &info);
  43                 if (r < 0)
  44                         log_error_errno(r, "Failed to get subvolume info: %m");
  45                 else {
  46                         log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime));
  47                         log_info("read-only (search): %s", yes_no(info.read_only));
  48                 }
  49
  50                 r = btrfs_qgroup_get_quota_fd(fd, 0, &quota);
  51                 if (r < 0)
  52                         log_error_errno(r, "Failed to get quota info: %m");
  53                 else {
  54                         log_info("referenced: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced)));
  55                         log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive)));
  56                         log_info("referenced_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced_max)));
  57                         log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max)));
  58                 }
  59
  60                 r = btrfs_subvol_get_read_only_fd(fd);
  61                 if (r < 0)
  62                         log_error_errno(r, "Failed to get read only flag: %m");
  63                 else
  64                         log_info("read-only (ioctl): %s", yes_no(r));
  65
  66                 safe_close(fd);
  67         }
  68
  69         r = btrfs_subvol_make("/xxxtest");
  70         if (r < 0)
  71                 log_error_errno(r, "Failed to make subvolume: %m");
  72
  73         r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha", WRITE_STRING_FILE_CREATE);
  74         if (r < 0)
  75                 log_error_errno(r, "Failed to write file: %m");
  76
  77         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", 0);
  78         if (r < 0)
  79                 log_error_errno(r, "Failed to make snapshot: %m");
  80
  81         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", BTRFS_SNAPSHOT_READ_ONLY);
  82         if (r < 0)
  83                 log_error_errno(r, "Failed to make snapshot: %m");
  84
  85         r = btrfs_subvol_remove("/xxxtest", BTRFS_REMOVE_QUOTA);
  86         if (r < 0)
  87                 log_error_errno(r, "Failed to remove subvolume: %m");
  88
  89         r = btrfs_subvol_remove("/xxxtest2", BTRFS_REMOVE_QUOTA);
  90         if (r < 0)
  91                 log_error_errno(r, "Failed to remove subvolume: %m");
  92
  93         r = btrfs_subvol_remove("/xxxtest3", BTRFS_REMOVE_QUOTA);
  94         if (r < 0)
  95                 log_error_errno(r, "Failed to remove subvolume: %m");
  96
  97         r = btrfs_subvol_snapshot("/etc", "/etc2", BTRFS_SNAPSHOT_READ_ONLY|BTRFS_SNAPSHOT_FALLBACK_COPY);
  98         if (r < 0)
  99                 log_error_errno(r, "Failed to make snapshot: %m");
 100
 101         r = btrfs_subvol_remove("/etc2", BTRFS_REMOVE_QUOTA);
 102         if (r < 0)
 103                 log_error_errno(r, "Failed to remove subvolume: %m");
 104
 105         r = btrfs_subvol_make("/xxxrectest");
 106         if (r < 0)
 107                 log_error_errno(r, "Failed to make subvolume: %m");
 108
 109         r = btrfs_subvol_make("/xxxrectest/xxxrectest2");
 110         if (r < 0)
 111                 log_error_errno(r, "Failed to make subvolume: %m");
 112
 113         r = btrfs_subvol_make("/xxxrectest/xxxrectest3");
 114         if (r < 0)
 115                 log_error_errno(r, "Failed to make subvolume: %m");
 116
 117         r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub");
 118         if (r < 0)
 119                 log_error_errno(r, "Failed to make subvolume: %m");
 120
 121         if (mkdir("/xxxrectest/dir", 0755) < 0)
 122                 log_error_errno(errno, "Failed to make directory: %m");
 123
 124         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4");
 125         if (r < 0)
 126                 log_error_errno(r, "Failed to make subvolume: %m");
 127
 128         if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0)
 129                 log_error_errno(errno, "Failed to make directory: %m");
 130
 131         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5");
 132         if (r < 0)
 133                 log_error_errno(r, "Failed to make subvolume: %m");
 134
 135         if (mkdir("/xxxrectest/mnt", 0755) < 0)
 136                 log_error_errno(errno, "Failed to make directory: %m");
 137
 138         r = btrfs_subvol_snapshot("/xxxrectest", "/xxxrectest2", BTRFS_SNAPSHOT_RECURSIVE);
 139         if (r < 0)
 140                 log_error_errno(r, "Failed to snapshot subvolume: %m");
 141
 142         r = btrfs_subvol_remove("/xxxrectest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 143         if (r < 0)
 144                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 145
 146         r = btrfs_subvol_remove("/xxxrectest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 147         if (r < 0)
 148                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 149
 150         r = btrfs_subvol_make("/xxxquotatest");
 151         if (r < 0)
 152                 log_error_errno(r, "Failed to make subvolume: %m");
 153
 154         r = btrfs_subvol_auto_qgroup("/xxxquotatest", 0, true);
 155         if (r < 0)
 156                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 157
 158         r = btrfs_subvol_make("/xxxquotatest/beneath");
 159         if (r < 0)
 160                 log_error_errno(r, "Failed to make subvolume: %m");
 161
 162         r = btrfs_subvol_auto_qgroup("/xxxquotatest/beneath", 0, false);
 163         if (r < 0)
 164                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 165
 166         r = btrfs_qgroup_set_limit("/xxxquotatest/beneath", 0, 4ULL * 1024 * 1024 * 1024);
 167         if (r < 0)
 168                 log_error_errno(r, "Failed to set up quota limit: %m");
 169
 170         r = btrfs_subvol_set_subtree_quota_limit("/xxxquotatest", 0, 5ULL * 1024 * 1024 * 1024);
 171         if (r < 0)
 172                 log_error_errno(r, "Failed to set up quota limit: %m");
 173
 174         r = btrfs_subvol_snapshot("/xxxquotatest", "/xxxquotatest2", BTRFS_SNAPSHOT_RECURSIVE|BTRFS_SNAPSHOT_QUOTA);
 175         if (r < 0)
 176                 log_error_errno(r, "Failed to setup snapshot: %m");
 177
 178         r = btrfs_qgroup_get_quota("/xxxquotatest2/beneath", 0, &quota);
 179         if (r < 0)
 180                 log_error_errno(r, "Failed to query quota: %m");
 181
 182         assert_se(quota.referenced_max == 4ULL * 1024 * 1024 * 1024);
 183
 184         r = btrfs_subvol_get_subtree_quota("/xxxquotatest2", 0, &quota);
 185         if (r < 0)
 186                 log_error_errno(r, "Failed to query quota: %m");
 187
 188         assert_se(quota.referenced_max == 5ULL * 1024 * 1024 * 1024);
 189
 190         r = btrfs_subvol_remove("/xxxquotatest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 191         if (r < 0)
 192                 log_error_errno(r, "Failed remove subvolume: %m");
 193
 194         r = btrfs_subvol_remove("/xxxquotatest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 195         if (r < 0)
 196                 log_error_errno(r, "Failed remove subvolume: %m");
 197
 198         return 0;
 199 }