src/gpt-auto-generator/gpt-auto-generator.c

	gpt-auto-generator.c revision c51cf05646a11c65daf65c1123c77efb068f4f7b
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering/***
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  This file is part of systemd.
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  Copyright 2013 Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  systemd is free software; you can redistribute it and/or modify it
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  under the terms of the GNU Lesser General Public License as published by
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  (at your option) any later version.
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  systemd is distributed in the hope that it will be useful, but
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  Lesser General Public License for more details.
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  You should have received a copy of the GNU Lesser General Public License
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering***/
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include <unistd.h>
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include <stdlib.h>
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include <fcntl.h>
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include <sys/ioctl.h>
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include <sys/statfs.h>
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include <blkid.h>
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
4b357e15876b730343db08719c877fdb45b6ad42Michael Marineau#ifdef HAVE_LINUX_BTRFS_H
4b357e15876b730343db08719c877fdb45b6ad42Michael Marineau#include <linux/btrfs.h>
4b357e15876b730343db08719c877fdb45b6ad42Michael Marineau#endif
4b357e15876b730343db08719c877fdb45b6ad42Michael Marineau
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "path-util.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "util.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "mkdir.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "missing.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "sd-id128.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "libudev.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "special.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering#include "unit-name.h"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering/* TODO:
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering *
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering * - Properly handle cryptsetup partitions
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering * - Define new partition type for encrypted swap
4b1b14a6a6acb1640596d5e9542829d32989d385Lennart Poettering * - Make /home automount rather than mount
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering *
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering */
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic const char *arg_dest = "/tmp";
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmekstatic inline void blkid_free_probep(blkid_probe *b) {
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        if (*b)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                blkid_free_probe(*b);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek}
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek#define _cleanup_blkid_freep_probe_ _cleanup_(blkid_free_probep)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic int verify_gpt_partition(dev_t dev, sd_id128_t *type, unsigned *nr, char **fstype) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_free_ char *t = NULL;
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        _cleanup_blkid_freep_probe_ blkid_probe b = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        const char *v;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        int r;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = asprintf(&t, "/dev/block/%u:%u", major(dev), minor(dev));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -ENOMEM;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        errno = 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        b = blkid_new_probe_from_filename(t);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        if (!b)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                return errno != 0 ? -errno : -ENOMEM;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        blkid_probe_enable_superblocks(b, 1);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        blkid_probe_enable_partitions(b, 1);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        errno = 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = blkid_do_safeprobe(b);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        if (r == -2)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                return -ENODEV;
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        else if (r == 1)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                return -ENODEV;
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        else if (r != 0)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                return errno ? -errno : -EIO;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        errno = 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = blkid_probe_lookup_value(b, "PART_ENTRY_SCHEME", &v, NULL);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        if (r != 0)
091526ab20485492124852dcf629787f35816df8Zbigniew Jędrzejewski-Szmek                /* return 0 if we're not on GPT */
091526ab20485492124852dcf629787f35816df8Zbigniew Jędrzejewski-Szmek                return errno ? -errno : 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek        if (strcmp(v, "gpt") != 0)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                return 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (type) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                errno = 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = blkid_probe_lookup_value(b, "PART_ENTRY_TYPE", &v, NULL);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                if (r != 0)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                        return errno ? -errno : -EIO;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = sd_id128_from_string(v, type);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (r < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        return r;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (nr) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                errno = 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = blkid_probe_lookup_value(b, "PART_ENTRY_NUMBER", &v, NULL);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                if (r != 0)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                        return errno ? -errno : -EIO;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = safe_atou(v, nr);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (r < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        return r;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (fstype) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                char *fst;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                errno = 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = blkid_probe_lookup_value(b, "TYPE", &v, NULL);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (r != 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        *fstype = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                else {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        fst = strdup(v);
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                        if (!fst)
7384146530ac083efbef62b9ef5bb82c56565cd4Zbigniew Jędrzejewski-Szmek                                return -ENOMEM;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        *fstype = fst;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return 1;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic int add_swap(const char *path, const char *fstype) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_fclose_ FILE *f = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        log_debug("Adding swap: %s %s", path, fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        name = unit_name_from_path(path, ".swap");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!name)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        unit = strjoin(arg_dest, "/", name, NULL);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!unit)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        f = fopen(unit, "wxe");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!f) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to create unit file %s: %m", unit);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        fprintf(f,
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "# Automatically generated by systemd-gpt-auto-generator\n\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "[Unit]\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "DefaultDependencies=no\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "Before=" SPECIAL_UMOUNT_TARGET " " SPECIAL_SWAP_TARGET "\n\n"
ee530d8b73246f29781bd54a707ca75c7ef5a6cbLennart Poettering                "[Swap]\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "What=%s\n",
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                path);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        fflush(f);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (ferror(f)) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to write unit file %s: %m", unit);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!lnk)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        mkdir_parents_label(lnk, 0755);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (symlink(unit, lnk) < 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to create symlink %s: %m", lnk);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic int add_home(const char *path, const char *fstype) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_free_ char *unit = NULL, *lnk = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_fclose_ FILE *f = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
4b1b14a6a6acb1640596d5e9542829d32989d385Lennart Poettering        if (dir_is_empty("/home") <= 0)
4b1b14a6a6acb1640596d5e9542829d32989d385Lennart Poettering                return 0;
4b1b14a6a6acb1640596d5e9542829d32989d385Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        log_debug("Adding home: %s %s", path, fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        unit = strappend(arg_dest, "/home.mount");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!unit)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        f = fopen(unit, "wxe");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!f) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to create unit file %s: %m", unit);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        fprintf(f,
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "# Automatically generated by systemd-gpt-auto-generator\n\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "[Unit]\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "DefaultDependencies=no\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "After=" SPECIAL_LOCAL_FS_PRE_TARGET "\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "Before=" SPECIAL_UMOUNT_TARGET " " SPECIAL_LOCAL_FS_TARGET "\n\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "[Mount]\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "What=%s\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "Where=/home\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "Type=%s\n"
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                "FsckPassNo=2\n",
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                path, fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        fflush(f);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (ferror(f)) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to write unit file %s: %m", unit);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".requires/home.mount", NULL);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!lnk)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        mkdir_parents_label(lnk, 0755);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (symlink(unit, lnk) < 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to create symlink %s: %m", lnk);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic int enumerate_partitions(dev_t dev) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct udev *udev;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct udev_enumerate *e = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct udev_device *parent = NULL, *d = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct udev_list_entry *first, *item;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        unsigned home_nr = (unsigned) -1;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_free_ char *home = NULL, *home_fstype = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        int r;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        udev = udev_new();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!udev)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        e = udev_enumerate_new(udev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!e) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        d = udev_device_new_from_devnum(udev, 'b', dev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!d) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        parent = udev_device_get_parent(d);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (!parent) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = udev_enumerate_add_match_parent(e, parent);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r < 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = udev_enumerate_add_match_subsystem(e, "block");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r < 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = udev_enumerate_scan_devices(e);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r < 0) {
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                log_error("Failed to enumerate partitions on /dev/block/%u:%u: %s",
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                          major(dev), minor(dev), strerror(-r));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        first = udev_enumerate_get_list_entry(e);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        udev_list_entry_foreach(item, first) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                _cleanup_free_ char *fstype = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                const char *node = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                struct udev_device *q;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                sd_id128_t type_id;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                unsigned nr;
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                dev_t sub;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (!q) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (udev_device_get_devnum(q) == udev_device_get_devnum(d))
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        goto skip;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (udev_device_get_devnum(q) == udev_device_get_devnum(parent))
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        goto skip;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                node = udev_device_get_devnode(q);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (!node) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                sub = udev_device_get_devnum(q);
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                r = verify_gpt_partition(sub, &type_id, &nr, &fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (r < 0) {
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                        log_error("Failed to verify GPT partition /dev/block/%u:%u: %s",
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                                  major(sub), minor(sub), strerror(-r));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        udev_device_unref(q);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (r == 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        goto skip;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (sd_id128_equal(type_id, SD_ID128_MAKE(06,57,fd,6d,a4,ab,43,c4,84,e5,09,33,c8,4b,4f,4f)))
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        add_swap(node, fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                else if (sd_id128_equal(type_id, SD_ID128_MAKE(93,3a,c7,e1,2e,b4,4f,13,b8,44,0e,14,e2,ae,f9,15))) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        if (!home || nr < home_nr) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                free(home);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                home = strdup(node);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                if (!home) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                        r = log_oom();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                        goto finish;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                home_nr = nr;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                free(home_fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                home_fstype = fstype;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                fstype = NULL;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        skip:
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                udev_device_unref(q);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (home && home_fstype)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                add_home(home, home_fstype);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringfinish:
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (d)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                udev_device_unref(d);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (e)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                udev_enumerate_unref(e);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (udev)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                udev_unref(udev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return r;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic int get_btrfs_block_device(const char *path, dev_t *dev) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct btrfs_ioctl_fs_info_args fsi;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        _cleanup_close_ int fd = -1;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        uint64_t id;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        assert(path);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        assert(dev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        fd = open(path, O_DIRECTORY|O_CLOEXEC);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (fd < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        zero(fsi);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (ioctl(fd, BTRFS_IOC_FS_INFO, &fsi) < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        /* We won't do this for btrfs RAID */
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (fsi.num_devices != 1)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        for (id = 1; id <= fsi.max_id; id++) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                struct btrfs_ioctl_dev_info_args di;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                struct stat st;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                zero(di);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                di.devid = id;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (ioctl(fd, BTRFS_IOC_DEV_INFO, &di) < 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        if (errno == ENODEV)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                                continue;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (stat((char*) di.path, &st) < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (!S_ISBLK(st.st_mode))
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        return -ENODEV;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                if (major(st.st_rdev) == 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                        return -ENODEV;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                *dev = st.st_rdev;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return 1;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return -ENODEV;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringstatic int get_block_device(const char *path, dev_t *dev) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct stat st;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        struct statfs sfs;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        assert(path);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        assert(dev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (lstat("/", &st))
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (major(st.st_dev) != 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                *dev = st.st_dev;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return 1;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (statfs("/", &sfs) < 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return -errno;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
c51cf05646a11c65daf65c1123c77efb068f4f7bZbigniew Jędrzejewski-Szmek        if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC))
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return get_btrfs_block_device(path, dev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return 0;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poetteringint main(int argc, char *argv[]) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        dev_t dev;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        int r;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (argc > 1 && argc != 4) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("This program takes three or no arguments.");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return EXIT_FAILURE;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (argc > 1)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                arg_dest = argv[3];
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        log_set_target(LOG_TARGET_SAFE);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        log_parse_environment();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        log_open();
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        umask(0022);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (in_initrd())
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return EXIT_SUCCESS;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = get_block_device("/", &dev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r < 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_error("Failed to determine block device of root file system: %s", strerror(-r));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return EXIT_FAILURE;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r == 0) {
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                log_debug("Root file system not on a (single) block device.");
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return EXIT_SUCCESS;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek        log_debug("Root device /dev/block/%u:%u.", major(dev), minor(dev));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = verify_gpt_partition(dev, NULL, NULL, NULL);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r < 0) {
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                log_error("Failed to verify GPT partition /dev/block/%u:%u: %s",
d98cc1c019651b895464161072894a02cc43daabZbigniew Jędrzejewski-Szmek                          major(dev), minor(dev), strerror(-r));
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return EXIT_FAILURE;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        }
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        if (r == 0)
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering                return EXIT_SUCCESS;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        r = enumerate_partitions(dev);
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1a14a53cfded6e78c6e8dfb73fdff0039971d642Lennart Poettering}