+static int property_get_pool_path(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ assert(bus);
+ assert(reply);
+
+ return sd_bus_message_append(reply, "s", "/var/lib/machines");
+}
+
+static int property_get_pool_usage(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_close_ int fd = -1;
+ uint64_t usage = (uint64_t) -1;
+ struct stat st;
+
+ assert(bus);
+ assert(reply);
+
+ /* We try to read the quota info from /var/lib/machines, as
+ * well as the usage of the loopback file
+ * /var/lib/machines.raw, and pick the larger value. */
+
+ fd = open("/var/lib/machines", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
+ if (fd >= 0) {
+ BtrfsQuotaInfo q;
+
+ if (btrfs_subvol_get_quota_fd(fd, &q) >= 0)
+ usage = q.referred;
+ }
+
+ if (stat("/var/lib/machines.raw", &st) >= 0) {
+ if (usage == (uint64_t) -1 || st.st_blocks * 512ULL > usage)
+ usage = st.st_blocks * 512ULL;
+ }
+
+ return sd_bus_message_append(reply, "t", usage);
+}
+
+static int property_get_pool_limit(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ _cleanup_close_ int fd = -1;
+ uint64_t size = (uint64_t) -1;
+ struct stat st;
+
+ assert(bus);
+ assert(reply);
+
+ /* We try to read the quota limit from /var/lib/machines, as
+ * well as the size of the loopback file
+ * /var/lib/machines.raw, and pick the smaller value. */
+
+ fd = open("/var/lib/machines", O_RDONLY|O_CLOEXEC|O_DIRECTORY);
+ if (fd >= 0) {
+ BtrfsQuotaInfo q;
+
+ if (btrfs_subvol_get_quota_fd(fd, &q) >= 0)
+ size = q.referred_max;
+ }
+
+ if (stat("/var/lib/machines.raw", &st) >= 0) {
+ if (size == (uint64_t) -1 || (uint64_t) st.st_size < size)
+ size = st.st_size;
+ }
+
+ return sd_bus_message_append(reply, "t", size);
+}
+