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-rw-r--r--src/gpt-auto-generator/gpt-auto-generator.c352
1 files changed, 183 insertions, 169 deletions
diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
index e4ce48ca9b..67d0f2a5b9 100644
--- a/src/gpt-auto-generator/gpt-auto-generator.c
+++ b/src/gpt-auto-generator/gpt-auto-generator.c
@@ -51,86 +51,15 @@ static bool arg_root_enabled = true;
static bool arg_root_rw = false;
DEFINE_TRIVIAL_CLEANUP_FUNC(blkid_probe, blkid_free_probe);
-#define _cleanup_blkid_freep_probe_ _cleanup_(blkid_free_probep)
+#define _cleanup_blkid_free_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;
-
- errno = 0;
- 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);
- 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 -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)
- /* return 0 if we're not on GPT */
- return errno ? -errno : 0;
-
- 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)
- return errno ? -errno : -EIO;
-
- r = sd_id128_from_string(v, type);
- if (r < 0)
- return r;
- }
-
- if (nr) {
- errno = 0;
- r = blkid_probe_lookup_value(b, "PART_ENTRY_NUMBER", &v, NULL);
- if (r != 0)
- return errno ? -errno : -EIO;
-
- r = safe_atou(v, nr);
- if (r < 0)
- return r;
- }
-
-
- if (fstype) {
- errno = 0;
- r = blkid_probe_lookup_value(b, "TYPE", &v, NULL);
- if (r != 0)
- *fstype = NULL;
- else {
- char *fst;
-
- fst = strdup(v);
- if (!fst)
- return -ENOMEM;
-
- *fstype = fst;
- }
- }
-
- return 1;
-}
-
-static int add_swap(const char *path, const char *fstype) {
+static int add_swap(const char *path) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
- log_debug("Adding swap: %s %s", path, fstype);
+ assert(path);
+
+ log_debug("Adding swap: %s", path);
name = unit_name_from_path(path, ".swap");
if (!name)
@@ -309,12 +238,6 @@ static int add_mount(
assert(where);
assert(description);
- if (path_is_mount_point(where, true) <= 0 &&
- dir_is_empty(where) <= 0) {
- log_debug("%s already populated, ignoring.", where);
- return 0;
- }
-
log_debug("Adding %s: %s %s", where, what, strna(fstype));
if (streq_ptr(fstype, "crypto_LUKS")) {
@@ -389,20 +312,86 @@ static int add_mount(
return 0;
}
-static int enumerate_partitions(struct udev *udev, dev_t dev) {
+static int probe_and_add_mount(
+ const char *id,
+ const char *what,
+ const char *where,
+ const char *description,
+ const char *post) {
+
+ _cleanup_blkid_free_probe_ blkid_probe b = NULL;
+ const char *fstype;
+ int r;
+
+ assert(id);
+ assert(what);
+ assert(where);
+ assert(description);
+
+ if (path_is_mount_point(where, true) <= 0 &&
+ dir_is_empty(where) <= 0) {
+ 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("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) {
+ if (errno == 0)
+ errno = EIO;
+ log_error("Failed to probe %s: %m", what);
+ return -errno;
+ }
+
+ blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
+
+ return add_mount(
+ id,
+ what,
+ where,
+ fstype,
+ NULL,
+ description,
+ post);
+}
+
+static int enumerate_partitions(dev_t devnum) {
+
_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
_cleanup_udev_device_unref_ struct udev_device *d = NULL;
- _cleanup_free_ char *home = NULL, *home_fstype = NULL, *srv = NULL, *srv_fstype = NULL;
- unsigned home_nr = (unsigned) -1, srv_nr = (unsigned )-1;
+ _cleanup_blkid_free_probe_ blkid_probe b = NULL;
+ _cleanup_udev_unref_ struct udev *udev = NULL;
+ _cleanup_free_ char *home = NULL, *srv = NULL;
struct udev_list_entry *first, *item;
struct udev_device *parent = NULL;
+ const char *node, *pttype, *devtype;
+ int home_nr = -1, srv_nr = -1;
+ blkid_partlist pl;
int r, k;
+ dev_t pn;
- e = udev_enumerate_new(udev);
- if (!e)
+ udev = udev_new();
+ if (!udev)
return log_oom();
- d = udev_device_new_from_devnum(udev, 'b', dev);
+ d = udev_device_new_from_devnum(udev, 'b', devnum);
if (!d)
return log_oom();
@@ -410,6 +399,79 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
if (!parent)
return log_oom();
+ /* Does it have a devtype? */
+ devtype = udev_device_get_devtype(parent);
+ if (!devtype)
+ return 0;
+
+ /* Is this a disk or a partition? We only care for disks... */
+ if (!streq(devtype, "disk"))
+ return 0;
+
+ /* Does it have a device node? */
+ node = udev_device_get_devnode(parent);
+ if (!node)
+ return 0;
+
+ log_debug("Root device %s.", node);
+
+ pn = udev_device_get_devnum(parent);
+ if (major(pn) == 0)
+ return 0;
+
+ errno = 0;
+ b = blkid_new_probe_from_filename(node);
+ if (!b) {
+ if (errno == 0)
+ return log_oom();
+
+ log_error("Failed allocate prober: %m");
+ return -errno;
+ }
+
+ blkid_probe_enable_superblocks(b, 1);
+ blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE);
+ 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) {
+ if (errno == 0)
+ errno = EIO;
+ log_error("Failed to probe %s: %m", node);
+ return -errno;
+ }
+
+ errno = 0;
+ r = blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL);
+ if (r != 0) {
+ if (errno == 0)
+ errno = EIO;
+ log_error("Failed to determine partition table type of %s: %m", node);
+ return -errno;
+ }
+
+ /* We only do this all for GPT... */
+ if (!streq_ptr(pttype, "gpt"))
+ return 0;
+
+ errno = 0;
+ pl = blkid_probe_get_partitions(b);
+ if (!pl) {
+ if (errno == 0)
+ return log_oom();
+
+ log_error("Failed to list of partitions of %s: %m", node);
+ return -errno;
+ }
+
+ e = udev_enumerate_new(udev);
+ if (!e)
+ return log_oom();
+
r = udev_enumerate_add_match_parent(e, parent);
if (r < 0)
return log_oom();
@@ -420,50 +482,55 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
r = udev_enumerate_scan_devices(e);
if (r < 0) {
- log_error("Failed to enumerate partitions on /dev/block/%u:%u: %s", major(dev), minor(dev), strerror(-r));
+ log_error("Failed to enumerate partitions on %s: %s", node, strerror(-r));
return r;
}
- r = 0;
-
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
_cleanup_udev_device_unref_ struct udev_device *q;
- _cleanup_free_ char *fstype = NULL;
- const char *node = NULL;
+ const char *stype, *subnode;
sd_id128_t type_id;
- unsigned nr;
+ blkid_partition pp;
+ dev_t qn;
+ int nr;
q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
if (!q)
- return log_oom();
+ continue;
- if (udev_device_get_devnum(q) == udev_device_get_devnum(d))
+ qn = udev_device_get_devnum(q);
+ if (major(qn) == 0)
continue;
- if (udev_device_get_devnum(q) == udev_device_get_devnum(parent))
+ if (qn == devnum)
continue;
- node = udev_device_get_devnode(q);
- if (!node)
- return log_oom();
+ if (qn == pn)
+ continue;
- k = verify_gpt_partition(node, &type_id, &nr, &fstype);
- if (k < 0) {
- /* skip child devices which are not detected properly */
- if (k == -EBADSLT)
- continue;
+ subnode = udev_device_get_devnode(q);
+ if (!subnode)
+ continue;
- log_error("Failed to verify GPT partition %s: %s", node, strerror(-k));
- r = k;
+ pp = blkid_partlist_devno_to_partition(pl, qn);
+ if (!pp)
continue;
- }
- if (k == 0)
+
+ nr = blkid_partition_get_partno(pp);
+ if (nr < 0)
+ continue;
+
+ stype = blkid_partition_get_type_string(pp);
+ if (!stype)
+ continue;
+
+ if (sd_id128_from_string(stype, &type_id) < 0)
continue;
if (sd_id128_equal(type_id, GPT_SWAP)) {
- k = add_swap(node, fstype);
+ k = add_swap(subnode);
if (k < 0)
r = k;
@@ -476,14 +543,10 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
home_nr = nr;
free(home);
- home = strdup(node);
+ home = strdup(subnode);
if (!home)
return log_oom();
- free(home_fstype);
- home_fstype = fstype;
- fstype = NULL;
-
} else if (sd_id128_equal(type_id, GPT_SRV)) {
/* We only care for the first /srv partition */
@@ -496,21 +559,17 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
srv = strdup(node);
if (!srv)
return log_oom();
-
- free(srv_fstype);
- srv_fstype = fstype;
- fstype = NULL;
}
}
- if (home && home_fstype) {
- k = add_mount("home", home, "/home", home_fstype, NULL, "Home Partition", SPECIAL_LOCAL_FS_TARGET);
+ if (home) {
+ k = probe_and_add_mount("home", home, "/home", "Home Partition", SPECIAL_LOCAL_FS_TARGET);
if (k < 0)
r = k;
}
- if (srv && srv_fstype) {
- k = add_mount("srv", srv, "/srv", srv_fstype, NULL, "Server Data Partition", SPECIAL_LOCAL_FS_TARGET);
+ if (srv) {
+ k = probe_and_add_mount("srv", srv, "/srv", "Server Data Partition", SPECIAL_LOCAL_FS_TARGET);
if (k < 0)
r = k;
}
@@ -590,27 +649,6 @@ 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) {
- _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;
-}
-
static int parse_proc_cmdline_item(const char *key, const char *value) {
int r;
@@ -678,8 +716,6 @@ static int add_root_mount(void) {
}
static int add_mounts(void) {
- _cleanup_udev_unref_ struct udev *udev = NULL;
- _cleanup_free_ char *node = NULL;
dev_t devno;
int r;
@@ -692,29 +728,7 @@ static int add_mounts(void) {
return 0;
}
- udev = udev_new();
- if (!udev)
- return log_oom();
-
- r = devno_to_devnode(udev, devno, &node);
- if (r < 0) {
- log_error("Failed to determine block device node from major/minor: %s", strerror(-r));
- return r;
- }
-
- 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));
- return r;
- }
- if (r == 0) {
- log_debug("Not a GPT disk, exiting.");
- return 0;
- }
-
- return enumerate_partitions(udev, devno);
+ return enumerate_partitions(devno);
}
int main(int argc, char *argv[]) {
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-28 22:44:38 +0000