#include <linux/btrfs.h>
#endif
+#include "sd-id128.h"
+#include "libudev.h"
#include "path-util.h"
#include "util.h"
#include "mkdir.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"
#include "generator.h"
#include "gpt.h"
+#include "fileio.h"
+#include "efivars.h"
+#include "blkid-util.h"
static const char *arg_dest = "/tmp";
+static bool arg_enabled = true;
+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)
-
-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)
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
+ "[Unit]\n"
+ "Description=Swap Partition\n"
+ "Documentation=man:systemd-gpt-auto-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
path);
return 0;
}
-static int add_mount(const char *what, const char *where, const char *fstype, const char *description) {
- _cleanup_free_ char *unit = NULL, *lnk = NULL, *p = NULL;
+static int add_cryptsetup(const char *id, const char *what, char **device) {
+ _cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL, *to = NULL;
_cleanup_fclose_ FILE *f = NULL;
+ char *from, *ret;
int r;
- if (dir_is_empty(where) <= 0) {
- log_debug("%s already populated, ignoring.", where);
- return 0;
+ assert(id);
+ assert(what);
+ assert(device);
+
+ d = unit_name_from_path(what, ".device");
+ if (!d)
+ return log_oom();
+
+ e = unit_name_escape(id);
+ if (!e)
+ return log_oom();
+
+ n = unit_name_build("systemd-cryptsetup", e, ".service");
+ if (!n)
+ return log_oom();
+
+ p = strjoin(arg_dest, "/", n, NULL);
+ if (!n)
+ return log_oom();
+
+ f = fopen(p, "wxe");
+ if (!f) {
+ log_error("Failed to create unit file %s: %m", p);
+ return -errno;
+ }
+
+ fprintf(f,
+ "# Automatically generated by systemd-gpt-auto-generator\n\n"
+ "[Unit]\n"
+ "Description=Cryptography Setup for %%I\n"
+ "Documentation=man:systemd-gpt-auto-generator(8) man:systemd-cryptsetup@.service(8)\n"
+ "DefaultDependencies=no\n"
+ "Conflicts=umount.target\n"
+ "BindsTo=dev-mapper-%%i.device %s\n"
+ "Before=umount.target cryptsetup.target\n"
+ "After=%s\n"
+ "IgnoreOnIsolate=true\n"
+ "After=systemd-readahead-collect.service systemd-readahead-replay.service\n\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "TimeoutSec=0\n" /* the binary handles timeouts anyway */
+ "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s'\n"
+ "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
+ d, d,
+ id, what,
+ id);
+
+ fflush(f);
+ if (ferror(f)) {
+ log_error("Failed to write file %s: %m", p);
+ return -errno;
}
- log_debug("Adding %s: %s %s", where, what, fstype);
+ from = strappenda("../", n);
+
+ to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
+ if (!to)
+ return log_oom();
+
+ mkdir_parents_label(to, 0755);
+ if (symlink(from, to) < 0) {
+ log_error("Failed to create symlink %s: %m", to);
+ return -errno;
+ }
+
+ free(to);
+ to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
+ if (!to)
+ return log_oom();
+
+ mkdir_parents_label(to, 0755);
+ if (symlink(from, to) < 0) {
+ log_error("Failed to create symlink %s: %m", to);
+ return -errno;
+ }
+
+ free(to);
+ to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
+ if (!to)
+ return log_oom();
+
+ mkdir_parents_label(to, 0755);
+ if (symlink(from, to) < 0) {
+ log_error("Failed to create symlink %s: %m", to);
+ return -errno;
+ }
+
+ free(p);
+ p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf", NULL);
+ if (!p)
+ return log_oom();
+
+ mkdir_parents_label(p, 0755);
+ r = write_string_file(p,
+ "# Automatically generated by systemd-gpt-auto-generator\n\n"
+ "[Unit]\n"
+ "JobTimeoutSec=0\n"); /* the binary handles timeouts anyway */
+ if (r < 0) {
+ log_error("Failed to write device drop-in: %s", strerror(-r));
+ return r;
+ }
+
+ ret = strappend("/dev/mapper/", id);
+ if (!ret)
+ return log_oom();
+
+ *device = ret;
+ return 0;
+}
+
+static int add_mount(
+ const char *id,
+ const char *what,
+ const char *where,
+ const char *fstype,
+ const char *options,
+ const char *description,
+ const char *post) {
+
+ _cleanup_free_ char *unit = NULL, *lnk = NULL, *crypto_what = NULL, *p = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(id);
+ assert(what);
+ assert(where);
+ assert(description);
+
+ log_debug("Adding %s: %s %s", where, what, strna(fstype));
+
+ if (streq_ptr(fstype, "crypto_LUKS")) {
+
+ r = add_cryptsetup(id, what, &crypto_what);
+ if (r < 0)
+ return r;
+
+ what = crypto_what;
+ fstype = NULL;
+ }
unit = unit_name_from_path(where, ".mount");
if (!unit)
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
- "Description=%s\n",
+ "Description=%s\n"
+ "Documentation=man:systemd-gpt-auto-generator(8)\n",
description);
+ if (post)
+ fprintf(f, "Before=%s\n", post);
+
r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
if (r < 0)
return r;
"\n"
"[Mount]\n"
"What=%s\n"
- "Where=%s\n"
- "Type=%s\n",
- what, where, fstype);
+ "Where=%s\n",
+ what, where);
+
+ if (fstype)
+ fprintf(f, "Type=%s\n", fstype);
+
+ if (options)
+ fprintf(f, "Options=%s\n", options);
fflush(f);
if (ferror(f)) {
- log_error("Failed to write unit file %s: %m", unit);
+ log_error("Failed to write unit file %s: %m", p);
return -errno;
}
- lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".requires/", unit, NULL);
- if (!lnk)
- return log_oom();
+ if (post) {
+ lnk = strjoin(arg_dest, "/", post, ".requires/", unit, NULL);
+ 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 -errno;
+ mkdir_parents_label(lnk, 0755);
+ if (symlink(p, lnk) < 0) {
+ log_error("Failed to create symlink %s: %m", lnk);
+ return -errno;
+ }
}
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;
- int r;
+ 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();
parent = udev_device_get_parent(d);
if (!parent)
+ return 0;
+
+ /* 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 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);
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;
}
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;
- r = verify_gpt_partition(node, &type_id, &nr, &fstype);
- if (r < 0) {
- /* 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)
+ subnode = udev_device_get_devnode(q);
+ if (!subnode)
+ continue;
+
+ pp = blkid_partlist_devno_to_partition(pl, qn);
+ if (!pp)
+ continue;
+
+ nr = blkid_partition_get_partno(pp);
+ if (nr < 0)
+ continue;
+
+ stype = blkid_partition_get_type_string(pp);
+ if (!stype)
continue;
- if (sd_id128_equal(type_id, GPT_SWAP))
- add_swap(node, fstype);
+ if (sd_id128_from_string(stype, &type_id) < 0)
+ continue;
+
+ if (sd_id128_equal(type_id, GPT_SWAP)) {
+
+ k = add_swap(subnode);
+ if (k < 0)
+ r = k;
- else if (sd_id128_equal(type_id, GPT_HOME)) {
+ } else if (sd_id128_equal(type_id, GPT_HOME)) {
/* We only care for the first /home partition */
if (home && nr >= home_nr)
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 */
srv = strdup(node);
if (!srv)
return log_oom();
-
- free(srv_fstype);
- srv_fstype = fstype;
- fstype = NULL;
}
}
- if (home && home_fstype)
- add_mount(home, "/home", home_fstype, "Home Partition");
+ 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)
- add_mount(srv, "/srv", srv_fstype, "Server Data Partition");
+ if (srv) {
+ k = probe_and_add_mount("srv", srv, "/srv", "Server Data Partition", SPECIAL_LOCAL_FS_TARGET);
+ if (k < 0)
+ r = k;
+ }
return r;
}
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;
+static int parse_proc_cmdline_item(const char *key, const char *value) {
+ int r;
- d = udev_device_new_from_devnum(udev, 'b', devno);
- if (!d)
- return log_oom();
+ assert(key);
- t = udev_device_get_devnode(d);
- if (!t)
- return -ENODEV;
+ if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto") && value) {
- n = strdup(t);
- if (!n)
- return -ENOMEM;
+ r = parse_boolean(value);
+ if (r < 0)
+ log_warning("Failed to parse gpt-auto switch %s. Ignoring.", value);
+
+ arg_enabled = r;
+
+ } else if (streq(key, "root") && value) {
+
+ /* Disable root disk logic if there's a root= value
+ * specified (unless it happens to be "gpt-auto") */
+
+ arg_root_enabled = streq(value, "gpt-auto");
+
+ } else if (streq(key, "rw") && !value)
+ arg_root_rw = true;
+ else if (streq(key, "ro") && !value)
+ arg_root_rw = false;
+ else if (startswith(key, "systemd.gpt-auto.") || startswith(key, "rd.systemd.gpt-auto."))
+ log_warning("Unknown kernel switch %s. Ignoring.", key);
- *ret = n;
return 0;
}
-int main(int argc, char *argv[]) {
- _cleanup_udev_unref_ struct udev *udev = NULL;
- _cleanup_free_ char *node = NULL;
+static int add_root_mount(void) {
+
+#ifdef ENABLE_EFI
+ int r;
+
+ if (!is_efi_boot()) {
+ log_debug("Not a EFI boot, not creating root mount.");
+ return 0;
+ }
+
+ r = efi_loader_get_device_part_uuid(NULL);
+ if (r == -ENOENT) {
+ log_debug("EFI loader partition unknown, exiting.");
+ return 0;
+ } else if (r < 0) {
+ log_error("Failed to read ESP partition UUID: %s", strerror(-r));
+ return r;
+ }
+
+ /* OK, we have an ESP partition, this is fantastic, so let's
+ * wait for a root device to show up. A udev rule will create
+ * the link for us under the right name. */
+
+ return add_mount(
+ "root",
+ "/dev/gpt-auto-root",
+ in_initrd() ? "/sysroot" : "/",
+ NULL,
+ arg_root_rw ? "rw" : "ro",
+ "Root Partition",
+ in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET);
+#else
+ return 0;
+#endif
+}
+
+static int add_mounts(void) {
dev_t devno;
+ int r;
+
+ r = get_block_device("/", &devno);
+ if (r < 0) {
+ log_error("Failed to determine block device of root file system: %s", strerror(-r));
+ return r;
+ } else if (r == 0) {
+ log_debug("Root file system not on a (single) block device.");
+ return 0;
+ }
+
+ return enumerate_partitions(devno);
+}
+
+int main(int argc, char *argv[]) {
int r = 0;
if (argc > 1 && argc != 4) {
umask(0022);
- if (in_initrd()) {
- log_debug("In initrd, exiting.");
- return EXIT_SUCCESS;
- }
-
if (detect_container(NULL) > 0) {
log_debug("In a container, exiting.");
return EXIT_SUCCESS;
}
- r = get_block_device("/", &devno);
- if (r < 0) {
- log_error("Failed to determine block device of root file system: %s", strerror(-r));
+ if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
return EXIT_FAILURE;
- } else if (r == 0) {
- log_debug("Root file system not on a (single) block device.");
+
+ if (!arg_enabled) {
+ log_debug("Disabled, exiting.");
return EXIT_SUCCESS;
}
- udev = udev_new();
- if (!udev) {
- log_oom();
- return EXIT_FAILURE;
- }
+ if (arg_root_enabled)
+ r = add_root_mount();
- 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 EXIT_FAILURE;
- }
+ if (!in_initrd()) {
+ int k;
- 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 EXIT_FAILURE;
- }
- if (r == 0) {
- log_debug("Not a GPT disk, exiting.");
- return EXIT_SUCCESS;
+ k = add_mounts();
+ if (k < 0)
+ r = k;
}
- r = enumerate_partitions(udev, devno);
- if (r < 0)
- return EXIT_FAILURE;
-
- return EXIT_SUCCESS;
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff