static int probe_and_add_mount(
const char *id,
const char *what,
const char *where,
bool rw,
const char *description,
const char *post) {
_cleanup_blkid_free_probe_ blkid_probe b = NULL;
const char *fstype = NULL;
int r;
assert(id);
assert(what);
assert(where);
assert(description);
if (path_is_busy(where)) {
log_debug("%s already populated, ignoring.", where);
return 0;
}
/* Let's check the partition type here, so that we know
* whether to do LUKS magic. */
errno = 0;
b = blkid_new_probe_from_filename(what);
if (!b) {
if (errno == 0)
return log_oom();
log_error_errno(errno, "Failed to allocate prober: %m");
return -errno;
}
blkid_probe_enable_superblocks(b, 1);
blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE);
errno = 0;
r = blkid_do_safeprobe(b);
if (r == -2 || r == 1) /* no result or uncertain */
return 0;
else if (r != 0)
return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what);
/* add_mount is OK with fstype being NULL. */
(void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
return add_mount(
id,
what,
where,
fstype,
rw,
NULL,
description,
post);
}
static int add_boot(const char *what) {
_cleanup_blkid_free_probe_ blkid_probe b = NULL;
const char *fstype = NULL, *uuid = NULL;
sd_id128_t id, type_id;
int r;
assert(what);
if (!is_efi_boot()) {
log_debug("Not an EFI boot, ignoring /boot.");
return 0;
}
if (in_initrd()) {
log_debug("In initrd, ignoring /boot.");
return 0;
}
if (detect_container() > 0) {
log_debug("In a container, ignoring /boot.");
return 0;
}
/* We create an .automount which is not overridden by the .mount from the fstab generator. */
if (fstab_is_mount_point("/boot")) {
log_debug("/boot specified in fstab, ignoring.");
return 0;
}
if (path_is_busy("/boot")) {
log_debug("/boot already populated, ignoring.");
return 0;
}
r = efi_loader_get_device_part_uuid(&id);
if (r == -ENOENT) {
log_debug("EFI loader partition unknown.");
return 0;
}
if (r < 0) {
log_error_errno(r, "Failed to read ESP partition UUID: %m");
return r;
}
errno = 0;
b = blkid_new_probe_from_filename(what);
if (!b) {
if (errno == 0)
return log_oom();
return log_error_errno(errno, "Failed to allocate prober: %m");
}
blkid_probe_enable_partitions(b, 1);
blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS);
errno = 0;
r = blkid_do_safeprobe(b);
if (r == -2 || r == 1) /* no result or uncertain */
return 0;
else if (r != 0)
return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what);
(void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
if (!streq(fstype, "vfat")) {
log_debug("Partition for /boot is not a FAT filesystem, ignoring.");
return 0;
}
r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &uuid, NULL);
if (r != 0) {
log_debug_errno(r, "Partition for /boot does not have a UUID, ignoring. %m");
return 0;
}
if (sd_id128_from_string(uuid, &type_id) < 0) {
log_debug("Partition for /boot does not have a valid UUID, ignoring.");
return 0;
}
if (!sd_id128_equal(type_id, id)) {
log_debug("Partition for /boot does not appear to be the partition we are booted from.");
return 0;
}
r = add_automount("boot",
what,
"/boot",
"vfat",
true,
"umask=0077",
"EFI System Partition Automount",
120 * USEC_PER_SEC);
return r;
}
