src/shared/machine-pool.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <sys/statfs.h>
   5
   6 #include "btrfs-util.h"
   7 #include "label.h"
   8 #include "machine-pool.h"
   9 #include "missing.h"
  10 #include "stat-util.h"
  11
  12 static int check_btrfs(void) {
  13         struct statfs sfs;
  14
  15         if (statfs("/var/lib/machines", &sfs) < 0) {
  16                 if (errno != ENOENT)
  17                         return -errno;
  18
  19                 if (statfs("/var/lib", &sfs) < 0)
  20                         return -errno;
  21         }
  22
  23         return F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC);
  24 }
  25
  26 int setup_machine_directory(sd_bus_error *error) {
  27         int r;
  28
  29         r = check_btrfs();
  30         if (r < 0)
  31                 return sd_bus_error_set_errnof(error, r, "Failed to determine whether /var/lib/machines is located on btrfs: %m");
  32         if (r == 0)
  33                 return 0;
  34
  35         (void) btrfs_subvol_make_label("/var/lib/machines");
  36
  37         r = btrfs_quota_enable("/var/lib/machines", true);
  38         if (r < 0)
  39                 log_warning_errno(r, "Failed to enable quota for /var/lib/machines, ignoring: %m");
  40
  41         r = btrfs_subvol_auto_qgroup("/var/lib/machines", 0, true);
  42         if (r < 0)
  43                 log_warning_errno(r, "Failed to set up default quota hierarchy for /var/lib/machines, ignoring: %m");
  44
  45         return 1;
  46 }