mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-24 21:34:08 +03:00
gpt-auto-generator: do not assume that /dev/block/%u:%u is useable
The generator might run before udev, and udev sets up the /dev/block/ symlinks, hence we cannot use them from the gpt generator. Instead, manually translate a major/minor to a device node.
This commit is contained in:
Lennart Poettering
parent
ef5bfcf668
commit
3db604b907
@ -55,18 +55,13 @@ static inline void blkid_free_probep(blkid_probe *b) {
|
||||
}
|
||||
#define _cleanup_blkid_freep_probe_ _cleanup_(blkid_free_probep)
|
||||
|
||||
static int verify_gpt_partition(dev_t dev, sd_id128_t *type, unsigned *nr, char **fstype) {
|
||||
_cleanup_free_ char *t = NULL;
|
||||
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);
|
||||
b = blkid_new_probe_from_filename(node);
|
||||
if (!b)
|
||||
return errno != 0 ? -errno : -ENOMEM;
|
||||
|
||||
@ -237,8 +232,7 @@ static int add_home(const char *path, const char *fstype) {
|
||||
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;
|
||||
@ -246,10 +240,6 @@ static int enumerate_partitions(dev_t dev) {
|
||||
_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();
|
||||
@ -294,7 +284,6 @@ static int enumerate_partitions(dev_t dev) {
|
||||
struct udev_device *q;
|
||||
sd_id128_t type_id;
|
||||
unsigned nr;
|
||||
dev_t sub;
|
||||
|
||||
q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
|
||||
if (!q) {
|
||||
@ -314,12 +303,10 @@ static int enumerate_partitions(dev_t dev) {
|
||||
goto finish;
|
||||
}
|
||||
|
||||
sub = udev_device_get_devnum(q);
|
||||
|
||||
r = verify_gpt_partition(sub, &type_id, &nr, &fstype);
|
||||
r = verify_gpt_partition(node, &type_id, &nr, &fstype);
|
||||
if (r < 0) {
|
||||
log_error("Failed to verify GPT partition /dev/block/%u:%u: %s",
|
||||
major(sub), minor(sub), strerror(-r));
|
||||
log_error("Failed to verify GPT partition %s: %s",
|
||||
node, strerror(-r));
|
||||
udev_device_unref(q);
|
||||
goto finish;
|
||||
}
|
||||
@ -360,8 +347,6 @@ finish:
|
||||
if (e)
|
||||
udev_enumerate_unref(e);
|
||||
|
||||
if (udev)
|
||||
udev_unref(udev);
|
||||
|
||||
return r;
|
||||
}
|
||||
@ -440,13 +425,50 @@ static int get_block_device(const char *path, dev_t *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) {
|
||||
r = log_oom();
|
||||
goto finish;
|
||||
}
|
||||
|
||||
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:
|
||||
if (d)
|
||||
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)
|
||||
@ -458,31 +480,48 @@ int main(int argc, char *argv[]) {
|
||||
|
||||
umask(0022);
|
||||
|
||||
if (in_initrd())
|
||||
return EXIT_SUCCESS;
|
||||
if (in_initrd()) {
|
||||
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;
|
||||
}
|
||||
|
||||
log_debug("Root device /dev/block/%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 /dev/block/%u:%u: %s",
|
||||
major(dev), minor(dev), 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:
|
||||
if (udev)
|
||||
udev_unref(udev);
|
||||
|
||||
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user