#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
-#include <linux/btrfs.h>
#include <sys/ioctl.h>
#include <sys/statfs.h>
-#include <blkid.h>
+#include <blkid/blkid.h>
+
+#ifdef HAVE_LINUX_BTRFS_H
+#include <linux/btrfs.h>
+#endif
#include "path-util.h"
#include "util.h"
#include "missing.h"
#include "sd-id128.h"
#include "libudev.h"
+#include "udev-util.h"
#include "special.h"
#include "unit-name.h"
+#include "virt.h"
/* TODO:
*
*
*/
+#define GPT_SWAP SD_ID128_MAKE(06,57,fd,6d,a4,ab,43,c4,84,e5,09,33,c8,4b,4f,4f)
+#define GPT_HOME SD_ID128_MAKE(93,3a,c7,e1,2e,b4,4f,13,b8,44,0e,14,e2,ae,f9,15)
+
static const char *arg_dest = "/tmp";
-static int verify_gpt_partition(dev_t dev, sd_id128_t *type, unsigned *nr, char **fstype) {
- _cleanup_free_ char *t = NULL;
- blkid_probe b = NULL;
+DEFINE_TRIVIAL_CLEANUP_FUNC(blkid_probe, blkid_free_probe);
+#define _cleanup_blkid_freep_probe_ _cleanup_(blkid_free_probep)
+
+static int verify_gpt_partition(const char *node, sd_id128_t *type, unsigned *nr, char **fstype) {
+ _cleanup_blkid_freep_probe_ blkid_probe b = NULL;
const char *v;
int r;
- r = asprintf(&t, "/dev/block/%u:%u", major(dev), minor(dev));
- if (r < 0)
- return -ENOMEM;
-
errno = 0;
- b = blkid_new_probe_from_filename(t);
- if (!b) {
- if (errno != 0)
- return -errno;
-
- return -ENOMEM;
- }
+ b = blkid_new_probe_from_filename(node);
+ if (!b)
+ return errno != 0 ? -errno : -ENOMEM;
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 = -ENODEV;
- goto finish;
- } else if (r == 1) {
- r = -ENODEV;
- goto finish;
- } else if (r != 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
+ if (r == -2 || r == 1) /* no result or uncertain */
+ return -EBADSLT;
+ else if (r != 0)
+ return errno ? -errno : -EIO;
errno = 0;
r = blkid_probe_lookup_value(b, "PART_ENTRY_SCHEME", &v, NULL);
- if (r != 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
+ if (r != 0)
+ /* return 0 if we're not on GPT */
+ return errno ? -errno : 0;
- if (strcmp(v, "gpt") != 0) {
- r = 0;
- goto finish;
- }
+ if (strcmp(v, "gpt") != 0)
+ return 0;
if (type) {
errno = 0;
r = blkid_probe_lookup_value(b, "PART_ENTRY_TYPE", &v, NULL);
- if (r != 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
+ if (r != 0)
+ return errno ? -errno : -EIO;
r = sd_id128_from_string(v, type);
if (r < 0)
if (nr) {
errno = 0;
r = blkid_probe_lookup_value(b, "PART_ENTRY_NUMBER", &v, NULL);
- if (r != 0) {
- r = errno ? -errno : -EIO;
- goto finish;
- }
+ if (r != 0)
+ return errno ? -errno : -EIO;
r = safe_atou(v, nr);
if (r < 0)
if (fstype) {
- char *fst;
-
errno = 0;
r = blkid_probe_lookup_value(b, "TYPE", &v, NULL);
if (r != 0)
*fstype = NULL;
else {
+ char *fst;
+
fst = strdup(v);
- if (!fst) {
- r = -ENOMEM;
- goto finish;
- }
+ if (!fst)
+ return -ENOMEM;
*fstype = fst;
}
}
return 1;
-
-finish:
- if (b)
- blkid_free_probe(b);
-
- return r;
}
static int add_swap(const char *path, const char *fstype) {
}
static int add_home(const char *path, const char *fstype) {
- _cleanup_free_ char *unit = NULL, *lnk = NULL;
+ _cleanup_free_ char *unit = NULL, *lnk = NULL, *fsck = NULL;
_cleanup_fclose_ FILE *f = NULL;
if (dir_is_empty("/home") <= 0)
return -errno;
}
+ fsck = unit_name_from_path_instance("systemd-fsck", path, ".service");
+ if (!fsck)
+ return log_oom();
+
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"DefaultDependencies=no\n"
- "After=" SPECIAL_LOCAL_FS_PRE_TARGET "\n"
+ "Requires=%s\n"
+ "After=" SPECIAL_LOCAL_FS_PRE_TARGET " %s\n"
"Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
"Before=" SPECIAL_UMOUNT_TARGET " " SPECIAL_LOCAL_FS_TARGET "\n\n"
"[Mount]\n"
"What=%s\n"
"Where=/home\n"
- "Type=%s\n"
- "FsckPassNo=2\n",
- path, fstype);
+ "Type=%s\n",
+ fsck, fsck, path, fstype);
fflush(f);
if (ferror(f)) {
if (!lnk)
return log_oom();
-
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0) {
log_error("Failed to create symlink %s: %m", lnk);
return 0;
}
-static int enumerate_partitions(dev_t dev) {
- struct udev *udev;
- struct udev_enumerate *e = NULL;
- struct udev_device *parent = NULL, *d = NULL;
+static int enumerate_partitions(struct udev *udev, dev_t dev) {
+ struct udev_device *parent = NULL;
+ _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
struct udev_list_entry *first, *item;
unsigned home_nr = (unsigned) -1;
_cleanup_free_ char *home = NULL, *home_fstype = NULL;
int r;
- udev = udev_new();
- if (!udev)
- return log_oom();
-
e = udev_enumerate_new(udev);
- if (!e) {
- r = log_oom();
- goto finish;
- }
+ if (!e)
+ return log_oom();
d = udev_device_new_from_devnum(udev, 'b', dev);
- if (!d) {
- r = log_oom();
- goto finish;
- }
+ if (!d)
+ return log_oom();
parent = udev_device_get_parent(d);
- if (!parent) {
- r = log_oom();
- goto finish;
- }
+ if (!parent)
+ return log_oom();
r = udev_enumerate_add_match_parent(e, parent);
- if (r < 0) {
- r = log_oom();
- goto finish;
- }
+ if (r < 0)
+ return log_oom();
r = udev_enumerate_add_match_subsystem(e, "block");
- if (r < 0) {
- r = log_oom();
- goto finish;
- }
+ if (r < 0)
+ return log_oom();
r = udev_enumerate_scan_devices(e);
if (r < 0) {
- log_error("Failed to enumerate partitions: %s", strerror(-r));
- goto finish;
+ log_error("Failed to enumerate partitions on /dev/block/%u:%u: %s",
+ major(dev), minor(dev), strerror(-r));
+ return r;
}
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
_cleanup_free_ char *fstype = NULL;
const char *node = NULL;
- struct udev_device *q;
+ _cleanup_udev_device_unref_ struct udev_device *q;
sd_id128_t type_id;
unsigned nr;
q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
- if (!q) {
- r = log_oom();
- goto finish;
- }
+ if (!q)
+ return log_oom();
if (udev_device_get_devnum(q) == udev_device_get_devnum(d))
- goto skip;
+ continue;
if (udev_device_get_devnum(q) == udev_device_get_devnum(parent))
- goto skip;
+ continue;
node = udev_device_get_devnode(q);
- if (!node) {
- r = log_oom();
- goto finish;
- }
+ if (!node)
+ return log_oom();
- r = verify_gpt_partition(udev_device_get_devnum(q), &type_id, &nr, &fstype);
+ r = verify_gpt_partition(node, &type_id, &nr, &fstype);
if (r < 0) {
- log_error("Failed to verify GPT partition: %s", strerror(-r));
- udev_device_unref(q);
- goto finish;
+ /* skip child devices which are not detected properly */
+ if (r == -EBADSLT)
+ continue;
+ log_error("Failed to verify GPT partition %s: %s",
+ node, strerror(-r));
+ return r;
}
if (r == 0)
- goto skip;
+ continue;
- if (sd_id128_equal(type_id, SD_ID128_MAKE(06,57,fd,6d,a4,ab,43,c4,84,e5,09,33,c8,4b,4f,4f)))
+ if (sd_id128_equal(type_id, GPT_SWAP))
add_swap(node, fstype);
- else if (sd_id128_equal(type_id, SD_ID128_MAKE(93,3a,c7,e1,2e,b4,4f,13,b8,44,0e,14,e2,ae,f9,15))) {
-
+ else if (sd_id128_equal(type_id, GPT_HOME)) {
if (!home || nr < home_nr) {
free(home);
home = strdup(node);
- if (!home) {
- r = log_oom();
- goto finish;
- }
+ if (!home)
+ return log_oom();
home_nr = nr;
fstype = NULL;
}
}
-
- skip:
- udev_device_unref(q);
}
if (home && home_fstype)
add_home(home, home_fstype);
-finish:
- if (d)
- udev_device_unref(d);
-
- if (e)
- udev_enumerate_unref(e);
-
- if (udev)
- udev_unref(udev);
-
return r;
}
static int get_btrfs_block_device(const char *path, dev_t *dev) {
- struct btrfs_ioctl_fs_info_args fsi;
+ struct btrfs_ioctl_fs_info_args fsi = {};
_cleanup_close_ int fd = -1;
uint64_t id;
if (fd < 0)
return -errno;
- zero(fsi);
if (ioctl(fd, BTRFS_IOC_FS_INFO, &fsi) < 0)
return -errno;
return 0;
for (id = 1; id <= fsi.max_id; id++) {
- struct btrfs_ioctl_dev_info_args di;
+ struct btrfs_ioctl_dev_info_args di = {
+ .devid = id,
+ };
struct stat st;
- zero(di);
- di.devid = id;
-
if (ioctl(fd, BTRFS_IOC_DEV_INFO, &di) < 0) {
if (errno == ENODEV)
continue;
if (statfs("/", &sfs) < 0)
return -errno;
- if (F_TYPE_CMP(sfs.f_type, BTRFS_SUPER_MAGIC))
+ if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC))
return get_btrfs_block_device(path, dev);
return 0;
}
+static int devno_to_devnode(struct udev *udev, dev_t devno, char **ret) {
+ _cleanup_udev_device_unref_ struct udev_device *d;
+ const char *t;
+ char *n;
+
+ d = udev_device_new_from_devnum(udev, 'b', devno);
+ if (!d)
+ return log_oom();
+
+ t = udev_device_get_devnode(d);
+ if (!t)
+ return -ENODEV;
+
+ n = strdup(t);
+ if (!n)
+ return -ENOMEM;
+
+ *ret = n;
+ return 0;
+}
+
int main(int argc, char *argv[]) {
- dev_t dev;
- int r;
+ _cleanup_free_ char *node = NULL;
+ _cleanup_udev_unref_ struct udev *udev = NULL;
+ dev_t devno;
+ int r = 0;
if (argc > 1 && argc != 4) {
log_error("This program takes three or no arguments.");
- return EXIT_FAILURE;
+ r = -EINVAL;
+ goto finish;
}
if (argc > 1)
umask(0022);
- if (in_initrd())
- return EXIT_SUCCESS;
+ if (in_initrd()) {
+ log_debug("In initrd, exiting.");
+ goto finish;
+ }
+
+ if (detect_container(NULL) > 0) {
+ log_debug("In a container, exiting.");
+ goto finish;
+ }
- r = get_block_device("/", &dev);
+ r = get_block_device("/", &devno);
if (r < 0) {
log_error("Failed to determine block device of root file system: %s", strerror(-r));
- return EXIT_FAILURE;
+ goto finish;
}
if (r == 0) {
log_debug("Root file system not on a (single) block device.");
- return EXIT_SUCCESS;
+ goto finish;
}
- log_debug("Root device %u:%u.", major(dev), minor(dev));
+ udev = udev_new();
+ if (!udev) {
+ r = log_oom();
+ goto finish;
+ }
- r = verify_gpt_partition(dev, NULL, NULL, NULL);
+ r = devno_to_devnode(udev, devno, &node);
if (r < 0) {
- log_error("Failed to verify GPT partition: %s", strerror(-r));
- return EXIT_FAILURE;
+ log_error("Failed to determine block device node from major/minor: %s", strerror(-r));
+ goto finish;
+ }
+
+ log_debug("Root device %s.", node);
+
+ r = verify_gpt_partition(node, NULL, NULL, NULL);
+ if (r < 0) {
+ log_error("Failed to verify GPT partition %s: %s", node, strerror(-r));
+ goto finish;
}
if (r == 0)
- return EXIT_SUCCESS;
+ goto finish;
- r = enumerate_partitions(dev);
+ r = enumerate_partitions(udev, devno);
+finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff