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
   8 #include <fcntl.h>
   9
  10 #include "btrfs-util.h"
  11 #include "fd-util.h"
  12 #include "fileio.h"
  13 #include "log.h"
  14 #include "parse-util.h"
  15 #include "string-util.h"
  16 #include "util.h"
  17
  18 int main(int argc, char *argv[]) {
  19         BtrfsQuotaInfo quota;
  20         int r, fd;
  21
  22         fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
  23         if (fd < 0)
  24                 log_error_errno(errno, "Failed to open root directory: %m");
  25         else {
  26                 char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX];
  27                 BtrfsSubvolInfo info;
  28
  29                 r = btrfs_subvol_get_info_fd(fd, 0, &info);
  30                 if (r < 0)
  31                         log_error_errno(r, "Failed to get subvolume info: %m");
  32                 else {
  33                         log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime));
  34                         log_info("read-only (search): %s", yes_no(info.read_only));
  35                 }
  36
  37                 r = btrfs_qgroup_get_quota_fd(fd, 0, &quota);
  38                 if (r < 0)
  39                         log_error_errno(r, "Failed to get quota info: %m");
  40                 else {
  41                         log_info("referenced: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced)));
  42                         log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive)));
  43                         log_info("referenced_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced_max)));
  44                         log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max)));
  45                 }
  46
  47                 r = btrfs_subvol_get_read_only_fd(fd);
  48                 if (r < 0)
  49                         log_error_errno(r, "Failed to get read only flag: %m");
  50                 else
  51                         log_info("read-only (ioctl): %s", yes_no(r));
  52
  53                 safe_close(fd);
  54         }
  55
  56         r = btrfs_subvol_make("/xxxtest");
  57         if (r < 0)
  58                 log_error_errno(r, "Failed to make subvolume: %m");
  59
  60         r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha", WRITE_STRING_FILE_CREATE);
  61         if (r < 0)
  62                 log_error_errno(r, "Failed to write file: %m");
  63
  64         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", 0);
  65         if (r < 0)
  66                 log_error_errno(r, "Failed to make snapshot: %m");
  67
  68         r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", BTRFS_SNAPSHOT_READ_ONLY);
  69         if (r < 0)
  70                 log_error_errno(r, "Failed to make snapshot: %m");
  71
  72         r = btrfs_subvol_remove("/xxxtest", BTRFS_REMOVE_QUOTA);
  73         if (r < 0)
  74                 log_error_errno(r, "Failed to remove subvolume: %m");
  75
  76         r = btrfs_subvol_remove("/xxxtest2", BTRFS_REMOVE_QUOTA);
  77         if (r < 0)
  78                 log_error_errno(r, "Failed to remove subvolume: %m");
  79
  80         r = btrfs_subvol_remove("/xxxtest3", BTRFS_REMOVE_QUOTA);
  81         if (r < 0)
  82                 log_error_errno(r, "Failed to remove subvolume: %m");
  83
  84         r = btrfs_subvol_snapshot("/etc", "/etc2", BTRFS_SNAPSHOT_READ_ONLY|BTRFS_SNAPSHOT_FALLBACK_COPY);
  85         if (r < 0)
  86                 log_error_errno(r, "Failed to make snapshot: %m");
  87
  88         r = btrfs_subvol_remove("/etc2", BTRFS_REMOVE_QUOTA);
  89         if (r < 0)
  90                 log_error_errno(r, "Failed to remove subvolume: %m");
  91
  92         r = btrfs_subvol_make("/xxxrectest");
  93         if (r < 0)
  94                 log_error_errno(r, "Failed to make subvolume: %m");
  95
  96         r = btrfs_subvol_make("/xxxrectest/xxxrectest2");
  97         if (r < 0)
  98                 log_error_errno(r, "Failed to make subvolume: %m");
  99
 100         r = btrfs_subvol_make("/xxxrectest/xxxrectest3");
 101         if (r < 0)
 102                 log_error_errno(r, "Failed to make subvolume: %m");
 103
 104         r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub");
 105         if (r < 0)
 106                 log_error_errno(r, "Failed to make subvolume: %m");
 107
 108         if (mkdir("/xxxrectest/dir", 0755) < 0)
 109                 log_error_errno(errno, "Failed to make directory: %m");
 110
 111         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4");
 112         if (r < 0)
 113                 log_error_errno(r, "Failed to make subvolume: %m");
 114
 115         if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0)
 116                 log_error_errno(errno, "Failed to make directory: %m");
 117
 118         r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5");
 119         if (r < 0)
 120                 log_error_errno(r, "Failed to make subvolume: %m");
 121
 122         if (mkdir("/xxxrectest/mnt", 0755) < 0)
 123                 log_error_errno(errno, "Failed to make directory: %m");
 124
 125         r = btrfs_subvol_snapshot("/xxxrectest", "/xxxrectest2", BTRFS_SNAPSHOT_RECURSIVE);
 126         if (r < 0)
 127                 log_error_errno(r, "Failed to snapshot subvolume: %m");
 128
 129         r = btrfs_subvol_remove("/xxxrectest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 130         if (r < 0)
 131                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 132
 133         r = btrfs_subvol_remove("/xxxrectest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 134         if (r < 0)
 135                 log_error_errno(r, "Failed to recursively remove subvolume: %m");
 136
 137         r = btrfs_subvol_make("/xxxquotatest");
 138         if (r < 0)
 139                 log_error_errno(r, "Failed to make subvolume: %m");
 140
 141         r = btrfs_subvol_auto_qgroup("/xxxquotatest", 0, true);
 142         if (r < 0)
 143                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 144
 145         r = btrfs_subvol_make("/xxxquotatest/beneath");
 146         if (r < 0)
 147                 log_error_errno(r, "Failed to make subvolume: %m");
 148
 149         r = btrfs_subvol_auto_qgroup("/xxxquotatest/beneath", 0, false);
 150         if (r < 0)
 151                 log_error_errno(r, "Failed to set up auto qgroup: %m");
 152
 153         r = btrfs_qgroup_set_limit("/xxxquotatest/beneath", 0, 4ULL * 1024 * 1024 * 1024);
 154         if (r < 0)
 155                 log_error_errno(r, "Failed to set up quota limit: %m");
 156
 157         r = btrfs_subvol_set_subtree_quota_limit("/xxxquotatest", 0, 5ULL * 1024 * 1024 * 1024);
 158         if (r < 0)
 159                 log_error_errno(r, "Failed to set up quota limit: %m");
 160
 161         r = btrfs_subvol_snapshot("/xxxquotatest", "/xxxquotatest2", BTRFS_SNAPSHOT_RECURSIVE|BTRFS_SNAPSHOT_QUOTA);
 162         if (r < 0)
 163                 log_error_errno(r, "Failed to setup snapshot: %m");
 164
 165         r = btrfs_qgroup_get_quota("/xxxquotatest2/beneath", 0, &quota);
 166         if (r < 0)
 167                 log_error_errno(r, "Failed to query quota: %m");
 168
 169         assert_se(quota.referenced_max == 4ULL * 1024 * 1024 * 1024);
 170
 171         r = btrfs_subvol_get_subtree_quota("/xxxquotatest2", 0, &quota);
 172         if (r < 0)
 173                 log_error_errno(r, "Failed to query quota: %m");
 174
 175         assert_se(quota.referenced_max == 5ULL * 1024 * 1024 * 1024);
 176
 177         r = btrfs_subvol_remove("/xxxquotatest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 178         if (r < 0)
 179                 log_error_errno(r, "Failed remove subvolume: %m");
 180
 181         r = btrfs_subvol_remove("/xxxquotatest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE);
 182         if (r < 0)
 183                 log_error_errno(r, "Failed remove subvolume: %m");
 184
 185         return 0;
 186 }