src/test/test-btrfs.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2014 Lennart Poettering
   4 ***/
   5
   6 #include <fcntl.h>
   7
   8 #include "btrfs-util.h"
   9 #include "fd-util.h"
  10 #include "fileio.h"
  11 #include "log.h"
  12 #include "parse-util.h"
  13 #include "string-util.h"
  14 #include "util.h"
  15
  16 int main(int argc, char *argv[]) {
  17         BtrfsQuotaInfo quota;
  18         int r, fd;
  19
  20         fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  21         if (fd < 0)
  22                 log_error_errno(errno, "Failed to open root directory: %m");
  23         else {
  24                 char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX];
  25                 BtrfsSubvolInfo info;
  26
  27                 r = btrfs_subvol_get_info_fd(fd, 0, &info);
  28                 if (r < 0)
  29                         log_error_errno(r, "Failed to get subvolume info: %m");
  30                 else {
  31                         log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime));
  32                         log_info("read-only (search): %s", yes_no(info.read_only));
  33                 }
  34
  35                 r = btrfs_qgroup_get_quota_fd(fd, 0, &quota);
  36                 if (r < 0)
  37                         log_error_errno(r, "Failed to get quota info: %m");
  38                 else {
  39                         log_info("referenced: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced)));
  40                         log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive)));
  41                         log_info("referenced_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced_max)));
  42                         log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max)));
  43                 }
  44
  45                 r = btrfs_subvol_get_read_only_fd(fd);
  46                 if (r < 0)
  47                         log_error_errno(r, "Failed to get read only flag: %m");
  48                 else
  49                         log_info("read-only (ioctl): %s", yes_no(r));
  50
  51                 safe_close(fd);
  52         }
  53
  54         r = btrfs_subvol_make("/xxxtest");
  55         if (r < 0)
  56                 log_error_errno(r, "Failed to make subvolume: %m");
  57
  58         r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha", WRITE_STRING_FILE_CREATE);
  59         if (r < 0)
  60                 log_error_errno(r, "Failed to write file: %m");
  61
  62         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", 0);
  63         if (r < 0)
  64                 log_error_errno(r, "Failed to make snapshot: %m");
  65
  66         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", BTRFS_SNAPSHOT_READ_ONLY);
  67         if (r < 0)
  68                 log_error_errno(r, "Failed to make snapshot: %m");
  69
  70         r = btrfs_subvol_remove("/xxxtest", BTRFS_REMOVE_QUOTA);
  71         if (r < 0)
  72                 log_error_errno(r, "Failed to remove subvolume: %m");
  73
  74         r = btrfs_subvol_remove("/xxxtest2", BTRFS_REMOVE_QUOTA);
  75         if (r < 0)
  76                 log_error_errno(r, "Failed to remove subvolume: %m");
  77
  78         r = btrfs_subvol_remove("/xxxtest3", BTRFS_REMOVE_QUOTA);
  79         if (r < 0)
  80                 log_error_errno(r, "Failed to remove subvolume: %m");
  81
  82         r = btrfs_subvol_snapshot("/etc", "/etc2", BTRFS_SNAPSHOT_READ_ONLY|BTRFS_SNAPSHOT_FALLBACK_COPY);
  83         if (r < 0)
  84                 log_error_errno(r, "Failed to make snapshot: %m");
  85
  86         r = btrfs_subvol_remove("/etc2", BTRFS_REMOVE_QUOTA);
  87         if (r < 0)
  88                 log_error_errno(r, "Failed to remove subvolume: %m");
  89
  90         r = btrfs_subvol_make("/xxxrectest");
  91         if (r < 0)
  92                 log_error_errno(r, "Failed to make subvolume: %m");
  93
  94         r = btrfs_subvol_make("/xxxrectest/xxxrectest2");
  95         if (r < 0)
  96                 log_error_errno(r, "Failed to make subvolume: %m");
  97
  98         r = btrfs_subvol_make("/xxxrectest/xxxrectest3");
  99         if (r < 0)
 100                 log_error_errno(r, "Failed to make subvolume: %m");
 101
 102         r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub");
 103         if (r < 0)
 104                 log_error_errno(r, "Failed to make subvolume: %m");
 105
 106         if (mkdir("/xxxrectest/dir", 0755) < 0)
 107                 log_error_errno(errno, "Failed to make directory: %m");
 108
 109         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4");
 110         if (r < 0)
 111                 log_error_errno(r, "Failed to make subvolume: %m");
 112
 113         if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0)
 114                 log_error_errno(errno, "Failed to make directory: %m");
 115
 116         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5");
 117         if (r < 0)
 118                 log_error_errno(r, "Failed to make subvolume: %m");
 119
 120         if (mkdir("/xxxrectest/mnt", 0755) < 0)
 121                 log_error_errno(errno, "Failed to make directory: %m");
 122
 123         r = btrfs_subvol_snapshot("/xxxrectest", "/xxxrectest2", BTRFS_SNAPSHOT_RECURSIVE);
 124         if (r < 0)
 125                 log_error_errno(r, "Failed to snapshot subvolume: %m");
 126
 127         r = btrfs_subvol_remove("/xxxrectest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 128         if (r < 0)
 129                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 130
 131         r = btrfs_subvol_remove("/xxxrectest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 132         if (r < 0)
 133                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 134
 135         r = btrfs_subvol_make("/xxxquotatest");
 136         if (r < 0)
 137                 log_error_errno(r, "Failed to make subvolume: %m");
 138
 139         r = btrfs_subvol_auto_qgroup("/xxxquotatest", 0, true);
 140         if (r < 0)
 141                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 142
 143         r = btrfs_subvol_make("/xxxquotatest/beneath");
 144         if (r < 0)
 145                 log_error_errno(r, "Failed to make subvolume: %m");
 146
 147         r = btrfs_subvol_auto_qgroup("/xxxquotatest/beneath", 0, false);
 148         if (r < 0)
 149                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 150
 151         r = btrfs_qgroup_set_limit("/xxxquotatest/beneath", 0, 4ULL * 1024 * 1024 * 1024);
 152         if (r < 0)
 153                 log_error_errno(r, "Failed to set up quota limit: %m");
 154
 155         r = btrfs_subvol_set_subtree_quota_limit("/xxxquotatest", 0, 5ULL * 1024 * 1024 * 1024);
 156         if (r < 0)
 157                 log_error_errno(r, "Failed to set up quota limit: %m");
 158
 159         r = btrfs_subvol_snapshot("/xxxquotatest", "/xxxquotatest2", BTRFS_SNAPSHOT_RECURSIVE|BTRFS_SNAPSHOT_QUOTA);
 160         if (r < 0)
 161                 log_error_errno(r, "Failed to setup snapshot: %m");
 162
 163         r = btrfs_qgroup_get_quota("/xxxquotatest2/beneath", 0, &quota);
 164         if (r < 0)
 165                 log_error_errno(r, "Failed to query quota: %m");
 166
 167         assert_se(quota.referenced_max == 4ULL * 1024 * 1024 * 1024);
 168
 169         r = btrfs_subvol_get_subtree_quota("/xxxquotatest2", 0, &quota);
 170         if (r < 0)
 171                 log_error_errno(r, "Failed to query quota: %m");
 172
 173         assert_se(quota.referenced_max == 5ULL * 1024 * 1024 * 1024);
 174
 175         r = btrfs_subvol_remove("/xxxquotatest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 176         if (r < 0)
 177                 log_error_errno(r, "Failed remove subvolume: %m");
 178
 179         r = btrfs_subvol_remove("/xxxquotatest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 180         if (r < 0)
 181                 log_error_errno(r, "Failed remove subvolume: %m");
 182
 183         return 0;
 184 }