src/shared/machine-pool.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4
   5 #include "btrfs-util.h"
   6 #include "label.h"
   7 #include "machine-pool.h"
   8 #include "missing_magic.h"
   9 #include "stat-util.h"
  10
  11 static int check_btrfs(void) {
  12         struct statfs sfs;
  13
  14         if (statfs("/var/lib/machines", &sfs) < 0) {
  15                 if (errno != ENOENT)
  16                         return -errno;
  17
  18                 if (statfs("/var/lib", &sfs) < 0)
  19                         return -errno;
  20         }
  21
  22         return F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC);
  23 }
  24
  25 int setup_machine_directory(sd_bus_error *error) {
  26         int r;
  27
  28         r = check_btrfs();
  29         if (r < 0)
  30                 return sd_bus_error_set_errnof(error, r, "Failed to determine whether /var/lib/machines is located on btrfs: %m");
  31         if (r == 0)
  32                 return 0;
  33
  34         (void) btrfs_subvol_make_label("/var/lib/machines");
  35
  36         r = btrfs_quota_enable("/var/lib/machines", true);
  37         if (r < 0)
  38                 log_warning_errno(r, "Failed to enable quota for /var/lib/machines, ignoring: %m");
  39
  40         r = btrfs_subvol_auto_qgroup("/var/lib/machines", 0, true);
  41         if (r < 0)
  42                 log_warning_errno(r, "Failed to set up default quota hierarchy for /var/lib/machines, ignoring: %m");
  43
  44         return 1;
  45 }