#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
-#include <linux/btrfs.h>
#include <sys/ioctl.h>
#include <sys/statfs.h>
#include <blkid.h>
+#ifdef HAVE_LINUX_BTRFS_H
+#include <linux/btrfs.h>
+#endif
+
#include "path-util.h"
#include "util.h"
#include "mkdir.h"
#include "libudev.h"
#include "special.h"
#include "unit-name.h"
+#include "virt.h"
/* TODO:
*
* - Properly handle cryptsetup partitions
* - Define new partition type for encrypted swap
+ * - Make /home automount rather than mount
*
*/
+#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;
+static inline void blkid_free_probep(blkid_probe *b) {
+ if (*b)
+ blkid_free_probe(*b);
+}
+#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)
+ return -ENODEV;
+ else if (r == 1)
+ return -ENODEV;
+ 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) {
"DefaultDependencies=no\n"
"Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
"Before=" SPECIAL_UMOUNT_TARGET " " SPECIAL_SWAP_TARGET "\n\n"
- "[Mount]\n"
+ "[Swap]\n"
"What=%s\n",
path);
_cleanup_free_ char *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
+ if (dir_is_empty("/home") <= 0)
+ return 0;
+
log_debug("Adding home: %s %s", path, fstype);
unit = strappend(arg_dest, "/home.mount");
return 0;
}
-static int enumerate_partitions(dev_t dev) {
- struct udev *udev;
+static int enumerate_partitions(struct udev *udev, dev_t dev) {
struct udev_enumerate *e = NULL;
struct udev_device *parent = NULL, *d = NULL;
struct udev_list_entry *first, *item;
_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 = udev_enumerate_scan_devices(e);
if (r < 0) {
- log_error("Failed to enumerate partitions: %s", strerror(-r));
+ log_error("Failed to enumerate partitions on /dev/block/%u:%u: %s",
+ major(dev), minor(dev), strerror(-r));
goto finish;
}
goto finish;
}
- 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));
+ log_error("Failed to verify GPT partition %s: %s",
+ node, strerror(-r));
udev_device_unref(q);
goto finish;
}
if (r == 0)
goto skip;
- 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 (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) {
+ struct udev_device *d = NULL;
+ const char *t;
+ char *n;
+ int r;
+
+ d = udev_device_new_from_devnum(udev, 'b', devno);
+ if (!d)
+ return log_oom();
+
+ t = udev_device_get_devnode(d);
+ if (!t) {
+ r = -ENODEV;
+ goto finish;
+ }
+
+ n = strdup(t);
+ if (!n) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ *ret = n;
+ r = 0;
+
+finish:
+ udev_device_unref(d);
+
+ return r;
+}
+
int main(int argc, char *argv[]) {
- dev_t dev;
+ _cleanup_free_ char *node = NULL;
+ struct udev *udev = NULL;
+ dev_t devno;
int r;
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.");
+ r = 0;
+ goto finish;
+ }
+
+ if (detect_container(NULL) > 0) {
+ log_debug("In a container, exiting.");
+ r = 0;
+ 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;
+ }
+
+ udev = udev_new();
+ if (!udev) {
+ r = log_oom();
+ goto finish;
+ }
+
+ r = devno_to_devnode(udev, devno, &node);
+ if (r < 0) {
+ log_error("Failed to determine block device node from major/minor: %s", strerror(-r));
+ goto finish;
}
- log_debug("Root device %u:%u.", major(dev), minor(dev));
+ log_debug("Root device %s.", node);
- r = verify_gpt_partition(dev, NULL, NULL, NULL);
+ r = verify_gpt_partition(node, NULL, NULL, NULL);
if (r < 0) {
- log_error("Failed to verify GPT partition: %s", strerror(-r));
- return EXIT_FAILURE;
+ 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(udev, devno);
- r = enumerate_partitions(dev);
+finish:
+ if (udev)
+ udev_unref(udev);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff