-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <unistd.h>
+#include <blkid/blkid.h>
#include <stdlib.h>
#include <sys/statfs.h>
-#include <blkid/blkid.h>
+#include <unistd.h>
-#include "sd-id128.h"
#include "libudev.h"
-#include "path-util.h"
-#include "util.h"
-#include "mkdir.h"
+#include "sd-id128.h"
+
+#include "alloc-util.h"
+#include "blkid-util.h"
+#include "btrfs-util.h"
+#include "dirent-util.h"
+#include "efivars.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fstab-util.h"
+#include "generator.h"
+#include "gpt.h"
#include "missing.h"
-#include "udev-util.h"
+#include "mkdir.h"
+#include "mount-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "proc-cmdline.h"
#include "special.h"
+#include "stat-util.h"
+#include "string-util.h"
+#include "udev-util.h"
#include "unit-name.h"
+#include "util.h"
#include "virt.h"
-#include "generator.h"
-#include "gpt.h"
-#include "fileio.h"
-#include "efivars.h"
-#include "blkid-util.h"
-#include "btrfs-util.h"
static const char *arg_dest = "/tmp";
static bool arg_enabled = true;
if (!b) {
if (errno == 0)
return log_oom();
- log_error_errno(errno, "Failed to allocate prober: %m");
- return -errno;
+ return log_error_errno(errno, "Failed to allocate prober: %m");
}
blkid_probe_enable_superblocks(b, 1);
}
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;
+ const char *esp;
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.");
+ log_debug("In initrd, ignoring the ESP.");
return 0;
}
- if (detect_container(NULL) > 0) {
- log_debug("In a container, ignoring /boot.");
+ if (detect_container() > 0) {
+ log_debug("In a container, ignoring the ESP.");
return 0;
}
- if (path_is_busy("/boot")) {
- log_debug("/boot already populated, ignoring.");
+ /* If /efi exists we'll use that. Otherwise we'll use /boot, as that's usually the better choice */
+ esp = access("/efi/", F_OK) >= 0 ? "/efi" : "/boot";
+
+ /* We create an .automount which is not overridden by the .mount from the fstab generator. */
+ if (fstab_is_mount_point(esp)) {
+ log_debug("%s specified in fstab, ignoring.", esp);
return 0;
}
- r = efi_loader_get_device_part_uuid(&id);
- if (r == -ENOENT) {
- log_debug("EFI loader partition unknown.");
+ if (path_is_busy(esp)) {
+ log_debug("%s already populated, ignoring.", esp);
return 0;
}
- if (r < 0) {
- log_error_errno(r, "Failed to read ESP partition UUID: %m");
- return r;
- }
+ if (is_efi_boot()) {
+ _cleanup_blkid_free_probe_ blkid_probe b = NULL;
+ const char *fstype = NULL, *uuid_string = NULL;
+ sd_id128_t loader_uuid, part_uuid;
- 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;
- }
+ /* If this is an EFI boot, be extra careful, and only mount the ESP if it was the ESP used for booting. */
- blkid_probe_enable_partitions(b, 1);
- blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS);
+ r = efi_loader_get_device_part_uuid(&loader_uuid);
+ if (r == -ENOENT) {
+ log_debug("EFI loader partition unknown.");
+ return 0;
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to read ESP partition UUID: %m");
- 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);
+ 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");
+ }
- (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;
- }
+ blkid_probe_enable_partitions(b, 1);
+ blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS);
- 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;
- }
+ 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);
- if (sd_id128_from_string(uuid, &type_id) < 0) {
- log_debug("Partition for /boot does not have a valid UUID, ignoring.");
- return 0;
- }
+ (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
+ if (!streq_ptr(fstype, "vfat")) {
+ log_debug("Partition for %s is not a FAT filesystem, ignoring.", esp);
+ 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;
- }
+ errno = 0;
+ r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &uuid_string, NULL);
+ if (r != 0) {
+ log_debug_errno(errno, "Partition for %s does not have a UUID, ignoring.", esp);
+ return 0;
+ }
- r = add_automount("boot",
- what,
- "/boot",
- "vfat",
- "EFI System Partition Automount",
- false,
- "umask=0077",
- 120 * USEC_PER_SEC);
+ if (sd_id128_from_string(uuid_string, &part_uuid) < 0) {
+ log_debug("Partition for %s does not have a valid UUID, ignoring.", esp);
+ return 0;
+ }
- return r;
+ if (!sd_id128_equal(part_uuid, loader_uuid)) {
+ log_debug("Partition for %s does not appear to be the partition we are booted from.", esp);
+ return 0;
+ }
+ } else
+ log_debug("Not an EFI boot, skipping ESP check.");
+
+ return add_automount("boot",
+ what,
+ esp,
+ "vfat",
+ true,
+ "umask=0077",
+ "EFI System Partition Automount",
+ 120 * USEC_PER_SEC);
}
#else
static int add_boot(const char *what) {
if (r == 1)
return 0; /* no results */
else if (r == -2) {
- log_warning("%s: probe gave ambiguous results, ignoring", node);
+ log_warning("%s: probe gave ambiguous results, ignoring.", node);
return 0;
} else if (r != 0)
return log_error_errno(errno ?: EIO, "%s: failed to probe: %m", node);
errno = 0;
r = blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL);
- if (r != 0)
- return log_error_errno(errno ?: EIO,
- "%s: failed to determine partition table type: %m", node);
+ if (r != 0) {
+ if (errno == 0)
+ return 0; /* No partition table found. */
+
+ return log_error_errno(errno, "%s: failed to determine partition table type: %m", node);
+ }
/* We only do this all for GPT... */
if (!streq_ptr(pttype, "gpt")) {
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
_cleanup_udev_device_unref_ struct udev_device *q;
+ unsigned long long flags;
const char *stype, *subnode;
sd_id128_t type_id;
blkid_partition pp;
if (sd_id128_from_string(stype, &type_id) < 0)
continue;
+ flags = blkid_partition_get_flags(pp);
+
if (sd_id128_equal(type_id, GPT_SWAP)) {
- unsigned long long flags;
- flags = blkid_partition_get_flags(pp);
if (flags & GPT_FLAG_NO_AUTO)
continue;
if (boot && nr >= boot_nr)
continue;
+ /* Note that we do not honour the "no-auto"
+ * flag for the ESP, as it is often unset, to
+ * hide it from Windows. */
+
boot_nr = nr;
r = free_and_strdup(&boot, subnode);
return log_oom();
} else if (sd_id128_equal(type_id, GPT_HOME)) {
- unsigned long long flags;
- flags = blkid_partition_get_flags(pp);
if (flags & GPT_FLAG_NO_AUTO)
continue;
return log_oom();
} else if (sd_id128_equal(type_id, GPT_SRV)) {
- unsigned long long flags;
- flags = blkid_partition_get_flags(pp);
if (flags & GPT_FLAG_NO_AUTO)
continue;
assert(path);
assert(dev);
+ /* Get's the block device directly backing a file system. If
+ * the block device is encrypted, returns the device mapper
+ * block device. */
+
if (lstat(path, &st))
return -errno;
return 0;
}
+static int get_block_device_harder(const char *path, dev_t *dev) {
+ _cleanup_closedir_ DIR *d = NULL;
+ _cleanup_free_ char *p = NULL, *t = NULL;
+ struct dirent *de, *found = NULL;
+ const char *q;
+ unsigned maj, min;
+ dev_t dt;
+ int r;
+
+ assert(path);
+ assert(dev);
+
+ /* Gets the backing block device for a file system, and
+ * handles LUKS encrypted file systems, looking for its
+ * immediate parent, if there is one. */
+
+ r = get_block_device(path, &dt);
+ if (r <= 0)
+ return r;
+
+ if (asprintf(&p, "/sys/dev/block/%u:%u/slaves", major(dt), minor(dt)) < 0)
+ return -ENOMEM;
+
+ d = opendir(p);
+ if (!d) {
+ if (errno == ENOENT)
+ goto fallback;
+
+ return -errno;
+ }
+
+ FOREACH_DIRENT_ALL(de, d, return -errno) {
+
+ if (STR_IN_SET(de->d_name, ".", ".."))
+ continue;
+
+ if (!IN_SET(de->d_type, DT_LNK, DT_UNKNOWN))
+ continue;
+
+ if (found) /* Don't try to support multiple backing block devices */
+ goto fallback;
+
+ found = de;
+ }
+
+ if (!found)
+ goto fallback;
+
+ q = strjoina(p, "/", found->d_name, "/dev");
+
+ r = read_one_line_file(q, &t);
+ if (r == -ENOENT)
+ goto fallback;
+ if (r < 0)
+ return r;
+
+ if (sscanf(t, "%u:%u", &maj, &min) != 2)
+ return -EINVAL;
+
+ if (maj == 0)
+ goto fallback;
+
+ *dev = makedev(maj, min);
+ return 1;
+
+fallback:
+ *dev = dt;
+ return 1;
+}
+
static int parse_proc_cmdline_item(const char *key, const char *value) {
int r;
* wait for a root device to show up. A udev rule will create
* the link for us under the right name. */
+ if (in_initrd()) {
+ r = generator_write_initrd_root_device_deps(arg_dest, "/dev/gpt-auto-root");
+ if (r < 0)
+ return 0;
+ }
+
return add_mount(
"root",
"/dev/gpt-auto-root",
dev_t devno;
int r;
- r = get_block_device("/", &devno);
+ r = get_block_device_harder("/", &devno);
if (r < 0)
return log_error_errno(r, "Failed to determine block device of root file system: %m");
else if (r == 0) {
- r = get_block_device("/usr", &devno);
+ r = get_block_device_harder("/usr", &devno);
if (r < 0)
return log_error_errno(r, "Failed to determine block device of /usr file system: %m");
else if (r == 0) {
umask(0022);
- if (detect_container(NULL) > 0) {
+ if (detect_container() > 0) {
log_debug("In a container, exiting.");
return EXIT_SUCCESS;
}