diff options
Diffstat (limited to 'src/gpt-auto-generator/gpt-auto-generator.c')
| -rw-r--r-- | src/gpt-auto-generator/gpt-auto-generator.c | 1042 |
1 files changed, 0 insertions, 1042 deletions
diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c deleted file mode 100644 index a098b27a8e..0000000000 --- a/src/gpt-auto-generator/gpt-auto-generator.c +++ /dev/null @@ -1,1042 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2013 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <blkid/blkid.h> -#include <stdlib.h> -#include <sys/statfs.h> -#include <unistd.h> - -#include "libudev.h" -#include "sd-id128.h" - -#include "alloc-util.h" -#include "blkid-util.h" -#include "btrfs-util.h" -#include "dirent-util.h" -#include "efivars.h" -#include "fd-util.h" -#include "fileio.h" -#include "fstab-util.h" -#include "generator.h" -#include "gpt.h" -#include "missing.h" -#include "mkdir.h" -#include "mount-util.h" -#include "parse-util.h" -#include "path-util.h" -#include "proc-cmdline.h" -#include "special.h" -#include "stat-util.h" -#include "string-util.h" -#include "udev-util.h" -#include "unit-name.h" -#include "util.h" -#include "virt.h" - -static const char *arg_dest = "/tmp"; -static bool arg_enabled = true; -static bool arg_root_enabled = true; -static bool arg_root_rw = false; - -static int add_cryptsetup(const char *id, const char *what, bool rw, 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; - - assert(id); - assert(what); - assert(device); - - r = unit_name_from_path(what, ".device", &d); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - e = unit_name_escape(id); - if (!e) - return log_oom(); - - r = unit_name_build("systemd-cryptsetup", e, ".service", &n); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - p = strjoin(arg_dest, "/", n, NULL); - if (!p) - return log_oom(); - - f = fopen(p, "wxe"); - if (!f) - return log_error_errno(errno, "Failed to create unit file %s: %m", p); - - 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" - "[Service]\n" - "Type=oneshot\n" - "RemainAfterExit=yes\n" - "TimeoutSec=0\n" /* the binary handles timeouts anyway */ - "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n" - "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n", - d, d, - id, what, rw ? "" : "read-only", - id); - - r = fflush_and_check(f); - if (r < 0) - return log_error_errno(r, "Failed to write file %s: %m", p); - - from = strjoina("../", n); - - to = strjoin(arg_dest, "/", d, ".wants/", n, NULL); - if (!to) - return log_oom(); - - mkdir_parents_label(to, 0755); - if (symlink(from, to) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", to); - - 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) - return log_error_errno(errno, "Failed to create symlink %s: %m", to); - - 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) - return log_error_errno(errno, "Failed to create symlink %s: %m", to); - - 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", - WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */ - if (r < 0) - return log_error_errno(r, "Failed to write device drop-in: %m"); - - 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, - bool rw, - 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, rw, &crypto_what); - if (r < 0) - return r; - - what = crypto_what; - fstype = NULL; - } - - r = unit_name_from_path(where, ".mount", &unit); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - p = strjoin(arg_dest, "/", unit, NULL); - if (!p) - return log_oom(); - - f = fopen(p, "wxe"); - if (!f) - return log_error_errno(errno, "Failed to create unit file %s: %m", unit); - - fprintf(f, - "# Automatically generated by systemd-gpt-auto-generator\n\n" - "[Unit]\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; - - fprintf(f, - "\n" - "[Mount]\n" - "What=%s\n" - "Where=%s\n", - what, where); - - if (fstype) - fprintf(f, "Type=%s\n", fstype); - - if (options) - fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro"); - else - fprintf(f, "Options=%s\n", rw ? "rw" : "ro"); - - r = fflush_and_check(f); - if (r < 0) - return log_error_errno(r, "Failed to write unit file %s: %m", p); - - if (post) { - lnk = strjoin(arg_dest, "/", post, ".requires/", unit, NULL); - if (!lnk) - return log_oom(); - - mkdir_parents_label(lnk, 0755); - if (symlink(p, lnk) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); - } - - return 0; -} - -static bool path_is_busy(const char *where) { - int r; - - /* already a mountpoint; generators run during reload */ - r = path_is_mount_point(where, AT_SYMLINK_FOLLOW); - if (r > 0) - return false; - - /* the directory might not exist on a stateless system */ - if (r == -ENOENT) - return false; - - if (r < 0) - return true; - - /* not a mountpoint but it contains files */ - if (dir_is_empty(where) <= 0) - return true; - - return false; -} - -static int probe_and_add_mount( - const char *id, - const char *what, - const char *where, - bool rw, - const char *description, - const char *post) { - - _cleanup_blkid_free_probe_ blkid_probe b = NULL; - const char *fstype = NULL; - int r; - - assert(id); - assert(what); - assert(where); - assert(description); - - if (path_is_busy(where)) { - 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(); - return log_error_errno(errno, "Failed to allocate prober: %m"); - } - - 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) - return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what); - - /* add_mount is OK with fstype being NULL. */ - (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); - - return add_mount( - id, - what, - where, - fstype, - rw, - NULL, - description, - post); -} - -static int add_swap(const char *path) { - _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL; - _cleanup_fclose_ FILE *f = NULL; - int r; - - assert(path); - - log_debug("Adding swap: %s", path); - - r = unit_name_from_path(path, ".swap", &name); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - unit = strjoin(arg_dest, "/", name, NULL); - if (!unit) - return log_oom(); - - f = fopen(unit, "wxe"); - if (!f) - return log_error_errno(errno, "Failed to create unit file %s: %m", unit); - - 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); - - r = fflush_and_check(f); - if (r < 0) - return log_error_errno(r, "Failed to write unit file %s: %m", unit); - - lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL); - if (!lnk) - return log_oom(); - - mkdir_parents_label(lnk, 0755); - if (symlink(unit, lnk) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); - - return 0; -} - -#ifdef ENABLE_EFI -static int add_automount( - const char *id, - const char *what, - const char *where, - const char *fstype, - bool rw, - const char *options, - const char *description, - usec_t timeout) { - - _cleanup_free_ char *unit = NULL, *lnk = NULL; - _cleanup_free_ char *opt, *p = NULL; - _cleanup_fclose_ FILE *f = NULL; - int r; - - assert(id); - assert(where); - assert(description); - - if (options) - opt = strjoin(options, ",noauto", NULL); - else - opt = strdup("noauto"); - if (!opt) - return log_oom(); - - r = add_mount(id, - what, - where, - fstype, - rw, - opt, - description, - NULL); - if (r < 0) - return r; - - r = unit_name_from_path(where, ".automount", &unit); - if (r < 0) - return log_error_errno(r, "Failed to generate unit name: %m"); - - p = strjoin(arg_dest, "/", unit, NULL); - if (!p) - return log_oom(); - - f = fopen(p, "wxe"); - if (!f) - return log_error_errno(errno, "Failed to create unit file %s: %m", unit); - - fprintf(f, - "# Automatically generated by systemd-gpt-auto-generator\n\n" - "[Unit]\n" - "Description=%s\n" - "Documentation=man:systemd-gpt-auto-generator(8)\n" - "[Automount]\n" - "Where=%s\n" - "TimeoutIdleSec=%lld\n", - description, - where, - (unsigned long long)timeout / USEC_PER_SEC); - - r = fflush_and_check(f); - if (r < 0) - return log_error_errno(r, "Failed to write unit file %s: %m", p); - - lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/", unit, NULL); - if (!lnk) - return log_oom(); - mkdir_parents_label(lnk, 0755); - - if (symlink(p, lnk) < 0) - return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); - - return 0; -} - -static int add_boot(const char *what) { - const char *esp; - int r; - - assert(what); - - if (in_initrd()) { - log_debug("In initrd, ignoring the ESP."); - return 0; - } - - if (detect_container() > 0) { - log_debug("In a container, ignoring the ESP."); - return 0; - } - - /* If /efi exists we'll use that. Otherwise we'll use /boot, as that's usually the better choice */ - esp = access("/efi/", F_OK) >= 0 ? "/efi" : "/boot"; - - /* We create an .automount which is not overridden by the .mount from the fstab generator. */ - if (fstab_is_mount_point(esp)) { - log_debug("%s specified in fstab, ignoring.", esp); - return 0; - } - - if (path_is_busy(esp)) { - log_debug("%s already populated, ignoring.", esp); - return 0; - } - - if (is_efi_boot()) { - _cleanup_blkid_free_probe_ blkid_probe b = NULL; - const char *fstype = NULL, *uuid_string = NULL; - sd_id128_t loader_uuid, part_uuid; - - /* If this is an EFI boot, be extra careful, and only mount the ESP if it was the ESP used for booting. */ - - r = efi_loader_get_device_part_uuid(&loader_uuid); - if (r == -ENOENT) { - log_debug("EFI loader partition unknown."); - return 0; - } - if (r < 0) - return log_error_errno(r, "Failed to read ESP partition UUID: %m"); - - errno = 0; - b = blkid_new_probe_from_filename(what); - if (!b) { - if (errno == 0) - return log_oom(); - return log_error_errno(errno, "Failed to allocate prober: %m"); - } - - 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) - return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what); - - (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); - if (!streq_ptr(fstype, "vfat")) { - log_debug("Partition for %s is not a FAT filesystem, ignoring.", esp); - return 0; - } - - errno = 0; - r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &uuid_string, NULL); - if (r != 0) { - log_debug_errno(errno, "Partition for %s does not have a UUID, ignoring.", esp); - return 0; - } - - if (sd_id128_from_string(uuid_string, &part_uuid) < 0) { - log_debug("Partition for %s does not have a valid UUID, ignoring.", esp); - return 0; - } - - if (!sd_id128_equal(part_uuid, loader_uuid)) { - log_debug("Partition for %s does not appear to be the partition we are booted from.", esp); - return 0; - } - } else - log_debug("Not an EFI boot, skipping ESP check."); - - return add_automount("boot", - what, - esp, - "vfat", - true, - "umask=0077", - "EFI System Partition Automount", - 120 * USEC_PER_SEC); -} -#else -static int add_boot(const char *what) { - return 0; -} -#endif - -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_blkid_free_probe_ blkid_probe b = NULL; - _cleanup_udev_unref_ struct udev *udev = NULL; - _cleanup_free_ char *boot = NULL, *home = NULL, *srv = NULL; - struct udev_list_entry *first, *item; - struct udev_device *parent = NULL; - const char *name, *node, *pttype, *devtype; - int boot_nr = -1, home_nr = -1, srv_nr = -1; - bool home_rw = true, srv_rw = true; - blkid_partlist pl; - int r, k; - dev_t pn; - - udev = udev_new(); - if (!udev) - return log_oom(); - - d = udev_device_new_from_devnum(udev, 'b', devnum); - if (!d) - return log_oom(); - - name = udev_device_get_devnode(d); - if (!name) - name = udev_device_get_syspath(d); - if (!name) { - log_debug("Device %u:%u does not have a name, ignoring.", - major(devnum), minor(devnum)); - return 0; - } - - parent = udev_device_get_parent(d); - if (!parent) { - log_debug("%s: not a partitioned device, ignoring.", name); - return 0; - } - - /* Does it have a devtype? */ - devtype = udev_device_get_devtype(parent); - if (!devtype) { - log_debug("%s: parent doesn't have a device type, ignoring.", name); - return 0; - } - - /* Is this a disk or a partition? We only care for disks... */ - if (!streq(devtype, "disk")) { - log_debug("%s: parent isn't a raw disk, ignoring.", name); - return 0; - } - - /* Does it have a device node? */ - node = udev_device_get_devnode(parent); - if (!node) { - log_debug("%s: parent device does not have device node, ignoring.", name); - return 0; - } - - log_debug("%s: root device %s.", name, 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(); - - return log_error_errno(errno, "%s: failed to allocate prober: %m", node); - } - - 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 == 1) - return 0; /* no results */ - else if (r == -2) { - log_warning("%s: probe gave ambiguous results, ignoring.", node); - return 0; - } else if (r != 0) - return log_error_errno(errno ?: EIO, "%s: failed to probe: %m", node); - - errno = 0; - r = blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); - if (r != 0) { - if (errno == 0) - return 0; /* No partition table found. */ - - return log_error_errno(errno, "%s: failed to determine partition table type: %m", node); - } - - /* We only do this all for GPT... */ - if (!streq_ptr(pttype, "gpt")) { - log_debug("%s: not a GPT partition table, ignoring.", node); - return 0; - } - - errno = 0; - pl = blkid_probe_get_partitions(b); - if (!pl) { - if (errno == 0) - return log_oom(); - - return log_error_errno(errno, "%s: failed to list partitions: %m", node); - } - - e = udev_enumerate_new(udev); - if (!e) - return log_oom(); - - r = udev_enumerate_add_match_parent(e, parent); - if (r < 0) - return log_oom(); - - r = udev_enumerate_add_match_subsystem(e, "block"); - if (r < 0) - return log_oom(); - - r = udev_enumerate_scan_devices(e); - if (r < 0) - return log_error_errno(r, "%s: failed to enumerate partitions: %m", node); - - first = udev_enumerate_get_list_entry(e); - udev_list_entry_foreach(item, first) { - _cleanup_udev_device_unref_ struct udev_device *q; - unsigned long long flags; - const char *stype, *subnode; - sd_id128_t type_id; - blkid_partition pp; - dev_t qn; - int nr; - - q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); - if (!q) - continue; - - qn = udev_device_get_devnum(q); - if (major(qn) == 0) - continue; - - if (qn == devnum) - continue; - - if (qn == pn) - continue; - - 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_from_string(stype, &type_id) < 0) - continue; - - flags = blkid_partition_get_flags(pp); - - if (sd_id128_equal(type_id, GPT_SWAP)) { - - if (flags & GPT_FLAG_NO_AUTO) - continue; - - if (flags & GPT_FLAG_READ_ONLY) { - log_debug("%s marked as read-only swap partition, which is bogus. Ignoring.", subnode); - continue; - } - - k = add_swap(subnode); - if (k < 0) - r = k; - - } else if (sd_id128_equal(type_id, GPT_ESP)) { - - /* We only care for the first /boot partition */ - if (boot && nr >= boot_nr) - continue; - - /* Note that we do not honour the "no-auto" - * flag for the ESP, as it is often unset, to - * hide it from Windows. */ - - boot_nr = nr; - - r = free_and_strdup(&boot, subnode); - if (r < 0) - return log_oom(); - - } else if (sd_id128_equal(type_id, GPT_HOME)) { - - if (flags & GPT_FLAG_NO_AUTO) - continue; - - /* We only care for the first /home partition */ - if (home && nr >= home_nr) - continue; - - home_nr = nr; - home_rw = !(flags & GPT_FLAG_READ_ONLY), - - r = free_and_strdup(&home, subnode); - if (r < 0) - return log_oom(); - - } else if (sd_id128_equal(type_id, GPT_SRV)) { - - if (flags & GPT_FLAG_NO_AUTO) - continue; - - /* We only care for the first /srv partition */ - if (srv && nr >= srv_nr) - continue; - - srv_nr = nr; - srv_rw = !(flags & GPT_FLAG_READ_ONLY), - - r = free_and_strdup(&srv, subnode); - if (r < 0) - return log_oom(); - } - } - - if (boot) { - k = add_boot(boot); - if (k < 0) - r = k; - } - - if (home) { - k = probe_and_add_mount("home", home, "/home", home_rw, "Home Partition", SPECIAL_LOCAL_FS_TARGET); - if (k < 0) - r = k; - } - - if (srv) { - k = probe_and_add_mount("srv", srv, "/srv", srv_rw, "Server Data Partition", SPECIAL_LOCAL_FS_TARGET); - if (k < 0) - r = k; - } - - return r; -} - -static int get_block_device(const char *path, dev_t *dev) { - struct stat st; - struct statfs sfs; - - assert(path); - assert(dev); - - /* Get's the block device directly backing a file system. If - * the block device is encrypted, returns the device mapper - * block device. */ - - if (lstat(path, &st)) - return -errno; - - if (major(st.st_dev) != 0) { - *dev = st.st_dev; - return 1; - } - - if (statfs(path, &sfs) < 0) - return -errno; - - if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC)) - return btrfs_get_block_device(path, dev); - - return 0; -} - -static int get_block_device_harder(const char *path, dev_t *dev) { - _cleanup_closedir_ DIR *d = NULL; - _cleanup_free_ char *p = NULL, *t = NULL; - struct dirent *de, *found = NULL; - const char *q; - unsigned maj, min; - dev_t dt; - int r; - - assert(path); - assert(dev); - - /* Gets the backing block device for a file system, and - * handles LUKS encrypted file systems, looking for its - * immediate parent, if there is one. */ - - r = get_block_device(path, &dt); - if (r <= 0) - return r; - - if (asprintf(&p, "/sys/dev/block/%u:%u/slaves", major(dt), minor(dt)) < 0) - return -ENOMEM; - - d = opendir(p); - if (!d) { - if (errno == ENOENT) - goto fallback; - - return -errno; - } - - FOREACH_DIRENT_ALL(de, d, return -errno) { - - if (STR_IN_SET(de->d_name, ".", "..")) - continue; - - if (!IN_SET(de->d_type, DT_LNK, DT_UNKNOWN)) - continue; - - if (found) /* Don't try to support multiple backing block devices */ - goto fallback; - - found = de; - } - - if (!found) - goto fallback; - - q = strjoina(p, "/", found->d_name, "/dev"); - - r = read_one_line_file(q, &t); - if (r == -ENOENT) - goto fallback; - if (r < 0) - return r; - - if (sscanf(t, "%u:%u", &maj, &min) != 2) - return -EINVAL; - - if (maj == 0) - goto fallback; - - *dev = makedev(maj, min); - return 1; - -fallback: - *dev = dt; - return 1; -} - -static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { - int r; - - assert(key); - - if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse gpt-auto switch \"%s\". Ignoring.", value); - else - 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; - - return 0; -} - -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) - return log_error_errno(r, "Failed to read ESP partition UUID: %m"); - - /* 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. */ - - if (in_initrd()) { - r = generator_write_initrd_root_device_deps(arg_dest, "/dev/gpt-auto-root"); - if (r < 0) - return 0; - } - - return add_mount( - "root", - "/dev/gpt-auto-root", - in_initrd() ? "/sysroot" : "/", - NULL, - arg_root_rw, - NULL, - "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_harder("/", &devno); - if (r < 0) - return log_error_errno(r, "Failed to determine block device of root file system: %m"); - else if (r == 0) { - r = get_block_device_harder("/usr", &devno); - if (r < 0) - return log_error_errno(r, "Failed to determine block device of /usr file system: %m"); - else if (r == 0) { - log_debug("Neither root nor /usr file system are 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) { - log_error("This program takes three or no arguments."); - return EXIT_FAILURE; - } - - if (argc > 1) - arg_dest = argv[3]; - - log_set_target(LOG_TARGET_SAFE); - log_parse_environment(); - log_open(); - - umask(0022); - - if (detect_container() > 0) { - log_debug("In a container, exiting."); - return EXIT_SUCCESS; - } - - r = parse_proc_cmdline(parse_proc_cmdline_item, NULL, false); - if (r < 0) - log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); - - if (!arg_enabled) { - log_debug("Disabled, exiting."); - return EXIT_SUCCESS; - } - - if (arg_root_enabled) - r = add_root_mount(); - - if (!in_initrd()) { - int k; - - k = add_mounts(); - if (k < 0) - r = k; - } - - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; -} |