+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- 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 <unistd.h>
-#include <stdlib.h>
-#include <sys/statfs.h>
-#include <blkid/blkid.h>
-
-#include "sd-id128.h"
-#include "libudev.h"
-#include "path-util.h"
-#include "util.h"
-#include "mkdir.h"
-#include "missing.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"
-#include "btrfs-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;
-
-static int add_swap(const char *path) {
- _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
- _cleanup_fclose_ FILE *f = NULL;
-
- assert(path);
-
- log_debug("Adding swap: %s", path);
-
- name = unit_name_from_path(path, ".swap");
- if (!name)
- return log_oom();
-
- 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);
-
- fflush(f);
- if (ferror(f))
- return log_error_errno(errno, "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;
-}
-
-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);
-
- 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 (!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);
-
- fflush(f);
- if (ferror(f))
- return log_error_errno(errno, "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"); /* 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 *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;
- }
-
- unit = unit_name_from_path(where, ".mount");
- if (!unit)
- return log_oom();
-
- 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);
-
- fprintf(f, "Options=%s\n", rw ? "rw" : "ro");
-
- fflush(f);
- if (ferror(f))
- return log_error_errno(errno, "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 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_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_errno(errno, "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)
- 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,
- 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_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 *name, *node, *pttype, *devtype;
- int 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 == -2 || r == 1) /* no result or uncertain */
- 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)
- return log_error_errno(errno ?: EIO,
- "%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;
- const char *stype, *subnode;
- sd_id128_t type_id;
- blkid_partition pp;
- dev_t qn;
- int nr;
- unsigned long long flags;
-
- 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;
-
- flags = blkid_partition_get_flags(pp);
-
- /* Ignore partitions that are not marked for automatic
- * mounting on discovery */
- if (flags & GPT_FLAG_NO_AUTO)
- 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;
-
- if (sd_id128_equal(type_id, GPT_SWAP)) {
-
- 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_HOME)) {
-
- /* We only care for the first /home partition */
- if (home && nr >= home_nr)
- continue;
-
- home_nr = nr;
- home_rw = !(flags & GPT_FLAG_READ_ONLY),
-
- free(home);
- home = strdup(subnode);
- if (!home)
- return log_oom();
-
- } else if (sd_id128_equal(type_id, GPT_SRV)) {
-
- /* We only care for the first /srv partition */
- if (srv && nr >= srv_nr)
- continue;
-
- srv_nr = nr;
- srv_rw = !(flags & GPT_FLAG_READ_ONLY),
-
- free(srv);
- srv = strdup(subnode);
- if (!srv)
- return log_oom();
- }
- }
-
- 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);
-
- 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 parse_proc_cmdline_item(const char *key, const char *value) {
- 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. */
-
- return add_mount(
- "root",
- "/dev/gpt-auto-root",
- in_initrd() ? "/sysroot" : "/",
- NULL,
- arg_root_rw,
- "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)
- return log_error_errno(r, "Failed to determine block device of root file system: %m");
- 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) {
- 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(NULL) > 0) {
- log_debug("In a container, exiting.");
- return EXIT_SUCCESS;
- }
-
- r = parse_proc_cmdline(parse_proc_cmdline_item);
- 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;
-}
~ianmdlvl / elogind.git / commitdiff