[ipfire-2.x.git] / src / install+setup / install / hw.c

/*#############################################################################
#                                                                             #
# IPFire - An Open Source Firewall Distribution                               #
# Copyright (C) 2014 IPFire development team                                  #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program 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 General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
#############################################################################*/

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <assert.h>
#include <blkid/blkid.h>
#include <fcntl.h>
#include <libudev.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/swap.h>
#include <unistd.h>

#include <linux/fs.h>

#include "hw.h"
#include "../libsmooth/libsmooth.h"

const char* other_filesystems[] = {
	"/dev",
	"/proc",
	"/sys",
	NULL
};

struct hw* hw_init() {
	struct hw* hw = malloc(sizeof(*hw));
	assert(hw);

	// Initialize libudev
	hw->udev = udev_new();
	if (!hw->udev) {
		fprintf(stderr, "Could not create udev instance\n");
		exit(1);
	}

	return hw;
}

void hw_free(struct hw* hw) {
	if (hw->udev)
		udev_unref(hw->udev);

	free(hw);
}

static int strstartswith(const char* a, const char* b) {
	return (strncmp(a, b, strlen(b)) == 0);
}

int hw_mount(const char* source, const char* target, const char* fs, int flags) {
	return mount(source, target, fs, flags, NULL);
}

int hw_umount(const char* target) {
	return umount2(target, MNT_DETACH);
}

static int hw_test_source_medium(const char* path) {
	int ret = hw_mount(path, SOURCE_MOUNT_PATH, "iso9660", MS_RDONLY);

	// If the source could not be mounted we
	// cannot proceed.
	if (ret)
		return ret;

	// Check if the test file exists.
	ret = access(SOURCE_TEST_FILE, F_OK);

	// Umount the test device.
	hw_umount(SOURCE_MOUNT_PATH);

	return ret;
}

char* hw_find_source_medium(struct hw* hw) {
	char* ret = NULL;

	struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);

	udev_enumerate_add_match_subsystem(enumerate, "block");
	udev_enumerate_scan_devices(enumerate);

	struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);

	struct udev_list_entry* dev_list_entry;
	udev_list_entry_foreach(dev_list_entry, devices) {
		const char* path = udev_list_entry_get_name(dev_list_entry);
		struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);

		const char* dev_path = udev_device_get_devnode(dev);

		// Skip everything what we cannot work with
		if (strstartswith(dev_path, "/dev/loop") || strstartswith(dev_path, "/dev/fd") ||
				strstartswith(dev_path, "/dev/ram") || strstartswith(dev_path, "/dev/md"))
			continue;

		if (hw_test_source_medium(dev_path)) {
			ret = strdup(dev_path);
		}

		udev_device_unref(dev);

		// If a suitable device was found the search will end.
		if (ret)
			break;
	}

	udev_enumerate_unref(enumerate);

	return ret;
}

static struct hw_disk** hw_create_disks() {
	struct hw_disk** ret = malloc(sizeof(*ret) * (HW_MAX_DISKS + 1));

	return ret;
}

static unsigned long long hw_block_device_get_size(const char* dev) {
	int fd = open(dev, O_RDONLY);
	if (fd < 0)
		return 0;

	unsigned long long size = blkid_get_dev_size(fd);
	close(fd);

	return size;
}

struct hw_disk** hw_find_disks(struct hw* hw) {
	struct hw_disk** ret = hw_create_disks();
	struct hw_disk** disks = ret;

	struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);

	udev_enumerate_add_match_subsystem(enumerate, "block");
	udev_enumerate_scan_devices(enumerate);

	struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);

	struct udev_list_entry* dev_list_entry;
	unsigned int i = HW_MAX_DISKS;
	udev_list_entry_foreach(dev_list_entry, devices) {
		const char* path = udev_list_entry_get_name(dev_list_entry);
		struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);

		const char* dev_path = udev_device_get_devnode(dev);

		// Skip everything what we cannot work with
		if (strstartswith(dev_path, "/dev/loop") || strstartswith(dev_path, "/dev/fd") ||
				strstartswith(dev_path, "/dev/ram") || strstartswith(dev_path, "/dev/sr") ||
				strstartswith(dev_path, "/dev/md")) {
			udev_device_unref(dev);
			continue;
		}

		// DEVTYPE must be disk (otherwise we will see all sorts of partitions here)
		const char* devtype = udev_device_get_property_value(dev, "DEVTYPE");
		if (devtype && (strcmp(devtype, "disk") != 0)) {
			udev_device_unref(dev);
			continue;
		}

		// Skip all source mediums
		if (hw_test_source_medium(dev_path) == 0) {
			udev_device_unref(dev);
			continue;
		}

		// Skip devices with a size of zero
		unsigned long long size = hw_block_device_get_size(dev_path);
		if (size == 0) {
			udev_device_unref(dev);
			continue;
		}

		struct hw_disk* disk = malloc(sizeof(*disk));
		if (disk == NULL)
			return NULL;

		disk->ref = 1;

		strncpy(disk->path, dev_path, sizeof(disk->path));

		disk->size = size;

		// Vendor
		const char* vendor = udev_device_get_property_value(dev, "ID_VENDOR");
		if (!vendor)
			vendor = udev_device_get_sysattr_value(dev, "vendor");
		if (!vendor)
			vendor = udev_device_get_sysattr_value(dev, "manufacturer");
		if (!vendor)
			vendor = "N/A";

		strncpy(disk->vendor, vendor, sizeof(disk->vendor));

		// Model
		const char* model = udev_device_get_property_value(dev, "ID_MODEL");
		if (!model)
			model = udev_device_get_sysattr_value(dev, "model");
		if (!model)
			model = udev_device_get_sysattr_value(dev, "product");
		if (!model)
			model = "N/A";

		strncpy(disk->model, model, sizeof(disk->model));

		snprintf(disk->description, sizeof(disk->description),
			"%4.1fGB %s - %s", (double)disk->size / pow(1024, 3),
			disk->vendor, disk->model);

		*disks++ = disk;

		if (--i == 0)
			break;

		udev_device_unref(dev);
	}

	udev_enumerate_unref(enumerate);

	*disks = NULL;

	return ret;
}

void hw_free_disks(struct hw_disk** disks) {
	struct hw_disk** disk = disks;

	while (*disk != NULL) {
		if (--(*disk)->ref == 0)
			free(*disk);

		disk++;
	}

	free(disks);
}

unsigned int hw_count_disks(struct hw_disk** disks) {
	unsigned int ret = 0;

	while (*disks++)
		ret++;

	return ret;
}

struct hw_disk** hw_select_disks(struct hw_disk** disks, int* selection) {
	struct hw_disk** ret = hw_create_disks();
	struct hw_disk** selected_disks = ret;

	unsigned int num_disks = hw_count_disks(disks);

	for (unsigned int i = 0; i < num_disks; i++) {
		if (selection && selection[i]) {
			struct hw_disk *selected_disk = disks[i];
			selected_disk->ref++;

			*selected_disks++ = selected_disk;
		}
	}

	// Set sentinel
	*selected_disks = NULL;

	return ret;
}

static unsigned long long hw_swap_size(struct hw_destination* dest) {
	unsigned long long memory = hw_memory();

	unsigned long long swap_size = memory / 4;

	// Min. swap size is 128MB
	if (swap_size < MB2BYTES(128))
		swap_size = MB2BYTES(128);

	// Cap swap size to 1GB
	else if (swap_size > MB2BYTES(1024))
		swap_size = MB2BYTES(1024);

	return swap_size;
}

static unsigned long long hw_root_size(struct hw_destination* dest) {
	unsigned long long root_size;

	if (dest->size < MB2BYTES(2048))
		root_size = MB2BYTES(1024);

	else if (dest->size >= MB2BYTES(2048) && dest->size <= MB2BYTES(3072))
		root_size = MB2BYTES(1536);

	else
		root_size = MB2BYTES(2048);

	return root_size;
}

static unsigned long long hw_boot_size(struct hw_destination* dest) {
	return MB2BYTES(64);
}

static int hw_calculate_partition_table(struct hw_destination* dest) {
	// Determine the size of the target block device
	if (dest->is_raid) {
		dest->size = (dest->disk1->size >= dest->disk2->size) ?
			dest->disk1->size : dest->disk2->size;
	} else {
		dest->size = dest->disk1->size;
	}

	dest->size_boot = hw_boot_size(dest);
	dest->size_swap = hw_swap_size(dest);
	dest->size_root = hw_root_size(dest);

	// Determine the size of the data partition.
	unsigned long long used_space = dest->size_boot + dest->size_swap + dest->size_root;

	// Disk is way too small
	if (used_space >= dest->size)
		return -1;

	dest->size_data = dest->size - used_space;

	// If it gets too small, we remove the swap space.
	if (dest->size_data <= MB2BYTES(256)) {
		dest->size_data += dest->size_swap;
		dest->size_swap = 0;
	}

	// Set partition names
	char path[DEV_SIZE];
	int part_idx = 1;

	snprintf(path, sizeof(path), "%s%s", dest->path, (dest->is_raid) ? "p" : "");

	if (dest->size_boot > 0) {
		dest->part_boot_idx = part_idx;

		snprintf(dest->part_boot, sizeof(dest->part_boot), "%s%d", path, part_idx++);
	} else
		*dest->part_boot = '\0';

	if (dest->size_swap > 0)
		snprintf(dest->part_swap, sizeof(dest->part_swap), "%s%d", path, part_idx++);
	else
		*dest->part_swap = '\0';

	// There is always a root partition
	if (!*dest->part_boot)
		dest->part_boot_idx = part_idx;

	snprintf(dest->part_root, sizeof(dest->part_root), "%s%d", path, part_idx++);

	if (dest->size_data > 0)
		snprintf(dest->part_data, sizeof(dest->part_data), "%s%d", path, part_idx++);
	else
		*dest->part_data = '\0';

	// Determine partition table
	dest->part_table = HW_PART_TABLE_MSDOS;

	// Disks over 2TB need to use GPT
	if (dest->size >= MB2BYTES(2047 * 1024))
		dest->part_table = HW_PART_TABLE_GPT;

	// We also use GPT on raid disks by default
	else if (dest->is_raid)
		dest->part_table = HW_PART_TABLE_GPT;

	return 0;
}

struct hw_destination* hw_make_destination(int part_type, struct hw_disk** disks) {
	struct hw_destination* dest = malloc(sizeof(*dest));

	if (part_type == HW_PART_TYPE_NORMAL) {
		dest->disk1 = *disks;
		dest->disk2 = NULL;

		strncpy(dest->path, dest->disk1->path, sizeof(dest->path));

	} else if (part_type == HW_PART_TYPE_RAID1) {
		dest->disk1 = *disks++;
		dest->disk2 = *disks;
		dest->raid_level = 1;

		snprintf(dest->path, sizeof(dest->path), "/dev/md0");
	}

	// Is this a RAID device?
	dest->is_raid = (part_type > HW_PART_TYPE_NORMAL);

	int r = hw_calculate_partition_table(dest);
	if (r)
		return NULL;

	// Set default filesystem
	dest->filesystem = HW_FS_DEFAULT;

	return dest;
}

unsigned long long hw_memory() {
	FILE* handle = NULL;
	char line[STRING_SIZE];

	unsigned long long memory = 0;

	/* Calculate amount of memory in machine */
	if ((handle = fopen("/proc/meminfo", "r"))) {
		while (fgets(line, sizeof(line), handle)) {
			if (!sscanf (line, "MemTotal: %llu kB", &memory)) {
				memory = 0;
			}
		}

		fclose(handle);
	}

	return memory * 1024;
}

int hw_create_partitions(struct hw_destination* dest) {
	char* cmd = NULL;

	asprintf(&cmd, "/usr/sbin/parted -s %s -a optimal", dest->path);

	// Set partition type
	if (dest->part_table == HW_PART_TABLE_MSDOS)
		asprintf(&cmd, "%s mklabel msdos", cmd);
	else if (dest->part_table == HW_PART_TABLE_GPT)
		asprintf(&cmd, "%s mklabel gpt", cmd);

	unsigned long long part_start = 0 * 1024 * 1024; // 1MB

	if (*dest->part_boot) {
		asprintf(&cmd, "%s mkpart %s ext2 %lluMB %lluMB", cmd,
			(dest->part_table == HW_PART_TABLE_GPT) ? "BOOT" : "primary",
			BYTES2MB(part_start), BYTES2MB(part_start + dest->size_boot));

		part_start += dest->size_boot;
	}

	if (*dest->part_swap) {
		asprintf(&cmd, "%s mkpart %s linux-swap %lluMB %lluMB", cmd,
			(dest->part_table == HW_PART_TABLE_GPT) ? "SWAP" : "primary",
			BYTES2MB(part_start), BYTES2MB(part_start + dest->size_swap));

		part_start += dest->size_swap;
	}

	if (*dest->part_root) {
		asprintf(&cmd, "%s mkpart %s ext2 %lluMB %lluMB", cmd,
			(dest->part_table == HW_PART_TABLE_GPT) ? "ROOT" : "primary",
			BYTES2MB(part_start), BYTES2MB(part_start + dest->size_root));

		part_start += dest->size_root;
	}

	if (*dest->part_data) {
		asprintf(&cmd, "%s mkpart %s ext2 %lluMB %lluMB", cmd,
			(dest->part_table == HW_PART_TABLE_GPT) ? "DATA" : "primary",
			BYTES2MB(part_start), BYTES2MB(part_start + dest->size_data));

		part_start += dest->size_data;
	}

	if (dest->part_table == HW_PART_TABLE_MSDOS && dest->part_boot_idx > 0) {
		asprintf(&cmd, "%s set %d boot on", cmd, dest->part_boot_idx);

	} else if (dest->part_table == HW_PART_TABLE_GPT) {
		asprintf(&cmd, "%s disk_set pmbr_boot on", cmd);
	}

	int r = mysystem(cmd);

	// Wait until the system re-read the partition table
	if (r == 0) {
		unsigned int counter = 10;

		while (counter-- > 0) {
			sleep(1);

			if (*dest->part_boot && (access(dest->part_boot, R_OK) != 0))
				continue;

			if (*dest->part_swap && (access(dest->part_swap, R_OK) != 0))
				continue;

			if (*dest->part_root && (access(dest->part_root, R_OK) != 0))
				continue;

			if (*dest->part_data && (access(dest->part_data, R_OK) != 0))
				continue;

			// All partitions do exist, exiting the loop.
			break;
		}
	}

	if (cmd)
		free(cmd);

	return r;
}

static int hw_format_filesystem(const char* path, int fs) {
	char cmd[STRING_SIZE] = "\0";

	// Swap
	if (fs == HW_FS_SWAP) {
		snprintf(cmd, sizeof(cmd), "/sbin/mkswap -v1 %s &>/dev/null", path);
	// ReiserFS
	} else if (fs == HW_FS_REISERFS) {
		snprintf(cmd, sizeof(cmd), "/sbin/mkreiserfs -f %s ", path);

	// EXT4
	} else if (fs == HW_FS_EXT4) {
		snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 %s", path);

	// EXT4 w/o journal
	} else if (fs == HW_FS_EXT4_WO_JOURNAL) {
		snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 -O ^has_journal %s", path);
	}

	assert(*cmd);

	int r = mysystem(cmd);

	return r;
}

int hw_create_filesystems(struct hw_destination* dest) {
	int r;

	// boot
	if (*dest->part_boot) {
		r = hw_format_filesystem(dest->part_boot, dest->filesystem);
		if (r)
			return r;
	}

	// swap
	if (*dest->part_swap) {
		r = hw_format_filesystem(dest->part_swap, HW_FS_SWAP);
		if (r)
			return r;
	}

	// root
	r = hw_format_filesystem(dest->part_root, dest->filesystem);
	if (r)
		return r;

	// data
	if (*dest->part_data) {
		r = hw_format_filesystem(dest->part_data, dest->filesystem);
		if (r)
			return r;
	}

	return 0;
}

int hw_mount_filesystems(struct hw_destination* dest, const char* prefix) {
	char target[STRING_SIZE];

	assert(*prefix == '/');

	const char* filesystem;
	switch (dest->filesystem) {
		case HW_FS_REISERFS:
			filesystem = "reiserfs";
			break;

		case HW_FS_EXT4:
		case HW_FS_EXT4_WO_JOURNAL:
			filesystem = "ext4";
			break;

		default:
			assert(0);
	}

	// root
	int r = hw_mount(dest->part_root, prefix, filesystem, 0);
	if (r)
		return r;

	// boot
	if (*dest->part_boot) {
		snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
		mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);

		r = hw_mount(dest->part_boot, target, filesystem, 0);
		if (r) {
			hw_umount_filesystems(dest, prefix);

			return r;
		}
	}

	// data
	if (*dest->part_data) {
		snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_DATA);
		mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);

		r = hw_mount(dest->part_data, target, filesystem, 0);
		if (r) {
			hw_umount_filesystems(dest, prefix);

			return r;
		}
	}

	// swap
	if (*dest->part_swap) {
		r = swapon(dest->part_swap, 0);
		if (r) {
			hw_umount_filesystems(dest, prefix);

			return r;
		}
	}

	// bind-mount misc filesystems
	char** otherfs = other_filesystems;
	while (*otherfs) {
		snprintf(target, sizeof(target), "%s%s", prefix, *otherfs);

		mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
		r = hw_mount(*otherfs, target, NULL, MS_BIND);
		if (r) {
			hw_umount_filesystems(dest, prefix);

			return r;
		}

		otherfs++;
	}

	return 0;
}

int hw_umount_filesystems(struct hw_destination* dest, const char* prefix) {
	// boot
	if (*dest->part_boot) {
		hw_umount(dest->part_boot);
	}

	// data
	if (*dest->part_data) {
		hw_umount(dest->part_data);
	}

	// root
	hw_umount(dest->part_root);

	// swap
	if (*dest->part_swap) {
		swapoff(dest->part_swap);
	}

	// misc filesystems
	char target[STRING_SIZE];
	char** otherfs = other_filesystems;

	while (*otherfs) {
		snprintf(target, sizeof(target), "%s%s", prefix, *otherfs++);
		hw_umount(target);
	}

	return 0;
}

int hw_setup_raid(struct hw_destination* dest) {
	char* cmd = NULL;

	assert(dest->is_raid);

	asprintf(&cmd, "echo \"y\" | /sbin/mdadm --create --verbose --metadata=0.9 %s", dest->path);

	switch (dest->raid_level) {
		case 1:
			asprintf(&cmd, "%s --level=1 --raid-devices=2", cmd);
			break;

		default:
			assert(0);
	}

	if (dest->disk1) {
		asprintf(&cmd, "%s %s", cmd, dest->disk1->path);
	}

	if (dest->disk2) {
		asprintf(&cmd, "%s %s", cmd, dest->disk2->path);
	}

	int r = mysystem(cmd);
	free(cmd);

	// Wait a moment until the device has been properly brought up
	if (r == 0) {
		unsigned int counter = 10;
		while (counter-- > 0) {
			sleep(1);

			// If the raid device has not yet been properly brought up,
			// opening it will fail with the message: Device or resource busy
			// Hence we will wait a bit until it becomes usable.
			FILE* f = fopen(dest->path, "r");
			if (f) {
				fclose(f);
				break;
			}
		}
	}

	return r;
}

int hw_stop_all_raid_arrays() {
	return mysystem("/sbin/mdadm --stop --scan");
}
Commit	Line	Data
f0fa1795 MT	1	/*#############################################################################
	2	# #
	3	# IPFire - An Open Source Firewall Distribution #
	4	# Copyright (C) 2014 IPFire development team #
	5	# #
	6	# This program is free software: you can redistribute it and/or modify #
	7	# it under the terms of the GNU General Public License as published by #
	8	# the Free Software Foundation, either version 3 of the License, or #
	9	# (at your option) any later version. #
	10	# #
	11	# This program is distributed in the hope that it will be useful, #
	12	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	13	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	14	# GNU General Public License for more details. #
	15	# #
	16	# You should have received a copy of the GNU General Public License #
	17	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	18	# #
	19	#############################################################################*/
	20
25fcce25 MT	21	#ifndef _GNU_SOURCE
	22	#define _GNU_SOURCE
	23	#endif
	24
f0fa1795	25	#include <assert.h>
d7dd283b MT	26	#include <blkid/blkid.h>
d7dd283b MT	27	#include <fcntl.h>
f0fa1795	28	#include <libudev.h>
d7dd283b	29	#include <math.h>
f0fa1795 MT	30	#include <stdio.h>
	31	#include <stdlib.h>
	32	#include <string.h>
d7dd283b	33	#include <sys/ioctl.h>
f0fa1795	34	#include <sys/mount.h>
25fcce25	35	#include <sys/swap.h>
f0fa1795 MT	36	#include <unistd.h>
f0fa1795 MT	37
d7dd283b MT	38	#include <linux/fs.h>
d7dd283b MT	39
f0fa1795	40	#include "hw.h"
25fcce25 MT	41	#include "../libsmooth/libsmooth.h"
	42
	43	const char* other_filesystems[] = {
	44	"/dev",
	45	"/proc",
	46	"/sys",
	47	NULL
	48	};
f0fa1795 MT	49
	50	struct hw* hw_init() {
	51	struct hw* hw = malloc(sizeof(*hw));
	52	assert(hw);
	53
	54	// Initialize libudev
	55	hw->udev = udev_new();
	56	if (!hw->udev) {
	57	fprintf(stderr, "Could not create udev instance\n");
	58	exit(1);
	59	}
	60
	61	return hw;
	62	}
	63
	64	void hw_free(struct hw* hw) {
	65	if (hw->udev)
	66	udev_unref(hw->udev);
	67
	68	free(hw);
	69	}
	70
	71	static int strstartswith(const char* a, const char* b) {
	72	return (strncmp(a, b, strlen(b)) == 0);
	73	}
	74
25fcce25 MT	75	int hw_mount(const char* source, const char* target, const char* fs, int flags) {
25fcce25 MT	76	return mount(source, target, fs, flags, NULL);
f0fa1795 MT	77	}
	78
	79	int hw_umount(const char* target) {
	80	return umount2(target, MNT_DETACH);
	81	}
	82
	83	static int hw_test_source_medium(const char* path) {
25fcce25	84	int ret = hw_mount(path, SOURCE_MOUNT_PATH, "iso9660", MS_RDONLY);
f0fa1795 MT	85
	86	// If the source could not be mounted we
	87	// cannot proceed.
	88	if (ret)
	89	return ret;
	90
	91	// Check if the test file exists.
	92	ret = access(SOURCE_TEST_FILE, F_OK);
	93
	94	// Umount the test device.
	95	hw_umount(SOURCE_MOUNT_PATH);
	96
	97	return ret;
	98	}
	99
	100	char* hw_find_source_medium(struct hw* hw) {
	101	char* ret = NULL;
	102
	103	struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);
	104
	105	udev_enumerate_add_match_subsystem(enumerate, "block");
	106	udev_enumerate_scan_devices(enumerate);
	107
	108	struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);
	109
	110	struct udev_list_entry* dev_list_entry;
	111	udev_list_entry_foreach(dev_list_entry, devices) {
	112	const char* path = udev_list_entry_get_name(dev_list_entry);
	113	struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);
	114
	115	const char* dev_path = udev_device_get_devnode(dev);
	116
	117	// Skip everything what we cannot work with
	118	if (strstartswith(dev_path, "/dev/loop") \|\| strstartswith(dev_path, "/dev/fd") \|\|
4a0d9bef	119	strstartswith(dev_path, "/dev/ram") \|\| strstartswith(dev_path, "/dev/md"))
f0fa1795 MT	120	continue;
	121
	122	if (hw_test_source_medium(dev_path)) {
	123	ret = strdup(dev_path);
	124	}
	125
	126	udev_device_unref(dev);
	127
	128	// If a suitable device was found the search will end.
	129	if (ret)
	130	break;
	131	}
	132
	133	udev_enumerate_unref(enumerate);
	134
	135	return ret;
	136	}
d7dd283b MT	137
	138	static struct hw_disk** hw_create_disks() {
	139	struct hw_disk** ret = malloc(sizeof(ret) (HW_MAX_DISKS + 1));
	140
	141	return ret;
	142	}
	143
	144	static unsigned long long hw_block_device_get_size(const char* dev) {
	145	int fd = open(dev, O_RDONLY);
	146	if (fd < 0)
	147	return 0;
	148
	149	unsigned long long size = blkid_get_dev_size(fd);
	150	close(fd);
	151
	152	return size;
	153	}
	154
	155	struct hw_disk** hw_find_disks(struct hw* hw) {
	156	struct hw_disk** ret = hw_create_disks();
	157	struct hw_disk** disks = ret;
	158
	159	struct udev_enumerate* enumerate = udev_enumerate_new(hw->udev);
	160
	161	udev_enumerate_add_match_subsystem(enumerate, "block");
	162	udev_enumerate_scan_devices(enumerate);
	163
	164	struct udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate);
	165
	166	struct udev_list_entry* dev_list_entry;
	167	unsigned int i = HW_MAX_DISKS;
	168	udev_list_entry_foreach(dev_list_entry, devices) {
	169	const char* path = udev_list_entry_get_name(dev_list_entry);
	170	struct udev_device* dev = udev_device_new_from_syspath(hw->udev, path);
	171
	172	const char* dev_path = udev_device_get_devnode(dev);
	173
	174	// Skip everything what we cannot work with
	175	if (strstartswith(dev_path, "/dev/loop") \|\| strstartswith(dev_path, "/dev/fd") \|\|
4a0d9bef MT	176	strstartswith(dev_path, "/dev/ram") \|\| strstartswith(dev_path, "/dev/sr") \|\|
4a0d9bef MT	177	strstartswith(dev_path, "/dev/md")) {
d7dd283b MT	178	udev_device_unref(dev);
	179	continue;
	180	}
	181
	182	// DEVTYPE must be disk (otherwise we will see all sorts of partitions here)
	183	const char* devtype = udev_device_get_property_value(dev, "DEVTYPE");
	184	if (devtype && (strcmp(devtype, "disk") != 0)) {
	185	udev_device_unref(dev);
	186	continue;
	187	}
	188
	189	// Skip all source mediums
	190	if (hw_test_source_medium(dev_path) == 0) {
	191	udev_device_unref(dev);
	192	continue;
	193	}
	194
	195	// Skip devices with a size of zero
	196	unsigned long long size = hw_block_device_get_size(dev_path);
	197	if (size == 0) {
	198	udev_device_unref(dev);
	199	continue;
	200	}
	201
	202	struct hw_disk* disk = malloc(sizeof(*disk));
	203	if (disk == NULL)
	204	return NULL;
	205
	206	disk->ref = 1;
	207
	208	strncpy(disk->path, dev_path, sizeof(disk->path));
	209
	210	disk->size = size;
	211
	212	// Vendor
	213	const char* vendor = udev_device_get_property_value(dev, "ID_VENDOR");
	214	if (!vendor)
	215	vendor = udev_device_get_sysattr_value(dev, "vendor");
	216	if (!vendor)
	217	vendor = udev_device_get_sysattr_value(dev, "manufacturer");
	218	if (!vendor)
	219	vendor = "N/A";
	220
	221	strncpy(disk->vendor, vendor, sizeof(disk->vendor));
	222
	223	// Model
	224	const char* model = udev_device_get_property_value(dev, "ID_MODEL");
	225	if (!model)
	226	model = udev_device_get_sysattr_value(dev, "model");
	227	if (!model)
	228	model = udev_device_get_sysattr_value(dev, "product");
	229	if (!model)
	230	model = "N/A";
	231
	232	strncpy(disk->model, model, sizeof(disk->model));
	233
	234	snprintf(disk->description, sizeof(disk->description),
	235	"%4.1fGB %s - %s", (double)disk->size / pow(1024, 3),
	236	disk->vendor, disk->model);
	237
	238	*disks++ = disk;
	239
	240	if (--i == 0)
	241	break;
242
243	udev_device_unref(dev);
244	}
245
246	udev_enumerate_unref(enumerate);
247
248	*disks = NULL;
249
250	return ret;
251	}
252
253	void hw_free_disks(struct hw_disk** disks) {
254	struct hw_disk** disk = disks;
255
256	while (*disk != NULL) {
257	if (--(*disk)->ref == 0)
258	free(*disk);
259
260	disk++;
261	}
262
263	free(disks);
264	}
265
266	unsigned int hw_count_disks(struct hw_disk** disks) {
267	unsigned int ret = 0;
268
269	while (*disks++)
270	ret++;
271
272	return ret;
273	}
274
275	struct hw_disk hw_select_disks(struct hw_disk disks, int* selection) {
276	struct hw_disk** ret = hw_create_disks();
277	struct hw_disk** selected_disks = ret;
278
279	unsigned int num_disks = hw_count_disks(disks);
280
281	for (unsigned int i = 0; i < num_disks; i++) {
282	if (selection && selection[i]) {
283	struct hw_disk *selected_disk = disks[i];
284	selected_disk->ref++;
285
286	*selected_disks++ = selected_disk;
287	}
288	}
289
290	// Set sentinel
291	*selected_disks = NULL;
292
293	return ret;
294	}
295
25fcce25 MT	296	static unsigned long long hw_swap_size(struct hw_destination* dest) {
	297	unsigned long long memory = hw_memory();
	298
	299	unsigned long long swap_size = memory / 4;
	300
	301	// Min. swap size is 128MB
	302	if (swap_size < MB2BYTES(128))
	303	swap_size = MB2BYTES(128);
	304
	305	// Cap swap size to 1GB
	306	else if (swap_size > MB2BYTES(1024))
	307	swap_size = MB2BYTES(1024);
	308
	309	return swap_size;
	310	}
	311
	312	static unsigned long long hw_root_size(struct hw_destination* dest) {
	313	unsigned long long root_size;
	314
	315	if (dest->size < MB2BYTES(2048))
	316	root_size = MB2BYTES(1024);
	317
	318	else if (dest->size >= MB2BYTES(2048) && dest->size <= MB2BYTES(3072))
	319	root_size = MB2BYTES(1536);
	320
	321	else
	322	root_size = MB2BYTES(2048);
	323
	324	return root_size;
	325	}
	326
	327	static unsigned long long hw_boot_size(struct hw_destination* dest) {
	328	return MB2BYTES(64);
	329	}
	330
	331	static int hw_calculate_partition_table(struct hw_destination* dest) {
	332	// Determine the size of the target block device
	333	if (dest->is_raid) {
	334	dest->size = (dest->disk1->size >= dest->disk2->size) ?
	335	dest->disk1->size : dest->disk2->size;
	336	} else {
	337	dest->size = dest->disk1->size;
	338	}
	339
	340	dest->size_boot = hw_boot_size(dest);
	341	dest->size_swap = hw_swap_size(dest);
	342	dest->size_root = hw_root_size(dest);
	343
	344	// Determine the size of the data partition.
	345	unsigned long long used_space = dest->size_boot + dest->size_swap + dest->size_root;
	346
	347	// Disk is way too small
	348	if (used_space >= dest->size)
	349	return -1;
	350
	351	dest->size_data = dest->size - used_space;
	352
	353	// If it gets too small, we remove the swap space.
	354	if (dest->size_data <= MB2BYTES(256)) {
	355	dest->size_data += dest->size_swap;
	356	dest->size_swap = 0;
	357	}
	358
	359	// Set partition names
360	char path[DEV_SIZE];
361	int part_idx = 1;
362
363	snprintf(path, sizeof(path), "%s%s", dest->path, (dest->is_raid) ? "p" : "");
364
365	if (dest->size_boot > 0) {
366	dest->part_boot_idx = part_idx;
367
368	snprintf(dest->part_boot, sizeof(dest->part_boot), "%s%d", path, part_idx++);
369	} else
370	*dest->part_boot = '\0';
371
372	if (dest->size_swap > 0)
373	snprintf(dest->part_swap, sizeof(dest->part_swap), "%s%d", path, part_idx++);
374	else
375	*dest->part_swap = '\0';
376
377	// There is always a root partition
378	if (!*dest->part_boot)
379	dest->part_boot_idx = part_idx;
380
381	snprintf(dest->part_root, sizeof(dest->part_root), "%s%d", path, part_idx++);
382
383	if (dest->size_data > 0)
384	snprintf(dest->part_data, sizeof(dest->part_data), "%s%d", path, part_idx++);
385	else
386	*dest->part_data = '\0';
387
388	// Determine partition table
389	dest->part_table = HW_PART_TABLE_MSDOS;
390
391	// Disks over 2TB need to use GPT
392	if (dest->size >= MB2BYTES(2047 * 1024))
393	dest->part_table = HW_PART_TABLE_GPT;
394
395	// We also use GPT on raid disks by default
396	else if (dest->is_raid)
397	dest->part_table = HW_PART_TABLE_GPT;
398
399	return 0;
400	}
401
d7dd283b MT	402	struct hw_destination* hw_make_destination(int part_type, struct hw_disk** disks) {
	403	struct hw_destination* dest = malloc(sizeof(*dest));
	404
	405	if (part_type == HW_PART_TYPE_NORMAL) {
	406	dest->disk1 = *disks;
	407	dest->disk2 = NULL;
	408
	409	strncpy(dest->path, dest->disk1->path, sizeof(dest->path));
	410
	411	} else if (part_type == HW_PART_TYPE_RAID1) {
	412	dest->disk1 = *disks++;
	413	dest->disk2 = *disks;
4a0d9bef	414	dest->raid_level = 1;
d7dd283b MT	415
	416	snprintf(dest->path, sizeof(dest->path), "/dev/md0");
	417	}
	418
	419	// Is this a RAID device?
	420	dest->is_raid = (part_type > HW_PART_TYPE_NORMAL);
	421
25fcce25 MT	422	int r = hw_calculate_partition_table(dest);
	423	if (r)
	424	return NULL;
d7dd283b	425
25fcce25 MT	426	// Set default filesystem
25fcce25 MT	427	dest->filesystem = HW_FS_DEFAULT;
d7dd283b MT	428
	429	return dest;
	430	}
c4e96674 MT	431
	432	unsigned long long hw_memory() {
	433	FILE* handle = NULL;
	434	char line[STRING_SIZE];
	435
	436	unsigned long long memory = 0;
	437
	438	/* Calculate amount of memory in machine */
	439	if ((handle = fopen("/proc/meminfo", "r"))) {
	440	while (fgets(line, sizeof(line), handle)) {
25fcce25	441	if (!sscanf (line, "MemTotal: %llu kB", &memory)) {
c4e96674 MT	442	memory = 0;
	443	}
	444	}
	445
	446	fclose(handle);
	447	}
	448
	449	return memory * 1024;
	450	}
25fcce25 MT	451
	452	int hw_create_partitions(struct hw_destination* dest) {
	453	char* cmd = NULL;
	454
	455	asprintf(&cmd, "/usr/sbin/parted -s %s -a optimal", dest->path);
	456
	457	// Set partition type
	458	if (dest->part_table == HW_PART_TABLE_MSDOS)
	459	asprintf(&cmd, "%s mklabel msdos", cmd);
	460	else if (dest->part_table == HW_PART_TABLE_GPT)
	461	asprintf(&cmd, "%s mklabel gpt", cmd);
	462
	463	unsigned long long part_start = 0 * 1024 * 1024; // 1MB
	464
	465	if (*dest->part_boot) {
	466	asprintf(&cmd, "%s mkpart %s ext2 %lluMB %lluMB", cmd,
	467	(dest->part_table == HW_PART_TABLE_GPT) ? "BOOT" : "primary",
	468	BYTES2MB(part_start), BYTES2MB(part_start + dest->size_boot));
	469
	470	part_start += dest->size_boot;
	471	}
	472
	473	if (*dest->part_swap) {
	474	asprintf(&cmd, "%s mkpart %s linux-swap %lluMB %lluMB", cmd,
	475	(dest->part_table == HW_PART_TABLE_GPT) ? "SWAP" : "primary",
	476	BYTES2MB(part_start), BYTES2MB(part_start + dest->size_swap));
	477
	478	part_start += dest->size_swap;
	479	}
	480
	481	if (*dest->part_root) {
	482	asprintf(&cmd, "%s mkpart %s ext2 %lluMB %lluMB", cmd,
	483	(dest->part_table == HW_PART_TABLE_GPT) ? "ROOT" : "primary",
	484	BYTES2MB(part_start), BYTES2MB(part_start + dest->size_root));
	485
	486	part_start += dest->size_root;
	487	}
	488
	489	if (*dest->part_data) {
	490	asprintf(&cmd, "%s mkpart %s ext2 %lluMB %lluMB", cmd,
	491	(dest->part_table == HW_PART_TABLE_GPT) ? "DATA" : "primary",
	492	BYTES2MB(part_start), BYTES2MB(part_start + dest->size_data));
	493
	494	part_start += dest->size_data;
	495	}
	496
	497	if (dest->part_table == HW_PART_TABLE_MSDOS && dest->part_boot_idx > 0) {
	498	asprintf(&cmd, "%s set %d boot on", cmd, dest->part_boot_idx);
	499
	500	} else if (dest->part_table == HW_PART_TABLE_GPT) {
	501	asprintf(&cmd, "%s disk_set pmbr_boot on", cmd);
	502	}
	503
	504	int r = mysystem(cmd);
	505
268090a8 MT	506	// Wait until the system re-read the partition table
	507	if (r == 0) {
	508	unsigned int counter = 10;
	509
	510	while (counter-- > 0) {
	511	sleep(1);
	512
	513	if (*dest->part_boot && (access(dest->part_boot, R_OK) != 0))
	514	continue;
	515
	516	if (*dest->part_swap && (access(dest->part_swap, R_OK) != 0))
	517	continue;
	518
	519	if (*dest->part_root && (access(dest->part_root, R_OK) != 0))
	520	continue;
	521
	522	if (*dest->part_data && (access(dest->part_data, R_OK) != 0))
	523	continue;
	524
	525	// All partitions do exist, exiting the loop.
	526	break;
	527	}
	528	}
	529
25fcce25 MT	530	if (cmd)
	531	free(cmd);
	532
	533	return r;
	534	}
	535
	536	static int hw_format_filesystem(const char* path, int fs) {
	537	char cmd[STRING_SIZE] = "\0";
	538
	539	// Swap
	540	if (fs == HW_FS_SWAP) {
	541	snprintf(cmd, sizeof(cmd), "/sbin/mkswap -v1 %s &>/dev/null", path);
	542	// ReiserFS
	543	} else if (fs == HW_FS_REISERFS) {
	544	snprintf(cmd, sizeof(cmd), "/sbin/mkreiserfs -f %s ", path);
	545
	546	// EXT4
	547	} else if (fs == HW_FS_EXT4) {
	548	snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 %s", path);
	549
	550	// EXT4 w/o journal
	551	} else if (fs == HW_FS_EXT4_WO_JOURNAL) {
	552	snprintf(cmd, sizeof(cmd), "/sbin/mke2fs -T ext4 -O ^has_journal %s", path);
	553	}
	554
	555	assert(*cmd);
	556
	557	int r = mysystem(cmd);
	558
	559	return r;
	560	}
	561
	562	int hw_create_filesystems(struct hw_destination* dest) {
	563	int r;
	564
	565	// boot
	566	if (*dest->part_boot) {
	567	r = hw_format_filesystem(dest->part_boot, dest->filesystem);
	568	if (r)
	569	return r;
	570	}
	571
	572	// swap
	573	if (*dest->part_swap) {
	574	r = hw_format_filesystem(dest->part_swap, HW_FS_SWAP);
	575	if (r)
	576	return r;
	577	}
	578
	579	// root
	580	r = hw_format_filesystem(dest->part_root, dest->filesystem);
	581	if (r)
	582	return r;
	583
	584	// data
	585	if (*dest->part_data) {
	586	r = hw_format_filesystem(dest->part_data, dest->filesystem);
	587	if (r)
	588	return r;
	589	}
	590
	591	return 0;
	592	}
	593
594	int hw_mount_filesystems(struct hw_destination* dest, const char* prefix) {
595	char target[STRING_SIZE];
596
597	assert(*prefix == '/');
598
599	const char* filesystem;
600	switch (dest->filesystem) {
601	case HW_FS_REISERFS:
602	filesystem = "reiserfs";
603	break;
604
605	case HW_FS_EXT4:
606	case HW_FS_EXT4_WO_JOURNAL:
607	filesystem = "ext4";
608	break;
609
610	default:
611	assert(0);
612	}
613
614	// root
615	int r = hw_mount(dest->part_root, prefix, filesystem, 0);
616	if (r)
617	return r;
618
619	// boot
620	if (*dest->part_boot) {
621	snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
622	mkdir(target, S_IRWXU\|S_IRWXG\|S_IRWXO);
623
624	r = hw_mount(dest->part_boot, target, filesystem, 0);
625	if (r) {
626	hw_umount_filesystems(dest, prefix);
627
628	return r;
629	}
630	}
631
632	// data
633	if (*dest->part_data) {
634	snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_DATA);
635	mkdir(target, S_IRWXU\|S_IRWXG\|S_IRWXO);
636
637	r = hw_mount(dest->part_data, target, filesystem, 0);
638	if (r) {
639	hw_umount_filesystems(dest, prefix);
640
641	return r;
642	}
643	}
644
645	// swap
646	if (*dest->part_swap) {
647	r = swapon(dest->part_swap, 0);
648	if (r) {
649	hw_umount_filesystems(dest, prefix);
650
651	return r;
652	}
653	}
654
655	// bind-mount misc filesystems
656	char** otherfs = other_filesystems;
657	while (*otherfs) {
658	snprintf(target, sizeof(target), "%s%s", prefix, *otherfs);
659
660	mkdir(target, S_IRWXU\|S_IRWXG\|S_IRWXO);
661	r = hw_mount(*otherfs, target, NULL, MS_BIND);
662	if (r) {
663	hw_umount_filesystems(dest, prefix);
664
665	return r;
666	}
667
668	otherfs++;
669	}
670
671	return 0;
672	}
673
674	int hw_umount_filesystems(struct hw_destination* dest, const char* prefix) {
675	// boot
676	if (*dest->part_boot) {
677	hw_umount(dest->part_boot);
678	}
679
680	// data
681	if (*dest->part_data) {
682	hw_umount(dest->part_data);
683	}
684
685	// root
686	hw_umount(dest->part_root);
687
688	// swap
689	if (*dest->part_swap) {
690	swapoff(dest->part_swap);
691	}
692
693	// misc filesystems
694	char target[STRING_SIZE];
695	char** otherfs = other_filesystems;
696
697	while (*otherfs) {
698	snprintf(target, sizeof(target), "%s%s", prefix, *otherfs++);
699	hw_umount(target);
700	}
701
702	return 0;
703	}
4a0d9bef MT	704
	705	int hw_setup_raid(struct hw_destination* dest) {
	706	char* cmd = NULL;
	707
	708	assert(dest->is_raid);
	709
	710	asprintf(&cmd, "echo \"y\" \| /sbin/mdadm --create --verbose --metadata=0.9 %s", dest->path);
	711
	712	switch (dest->raid_level) {
	713	case 1:
	714	asprintf(&cmd, "%s --level=1 --raid-devices=2", cmd);
	715	break;
	716
	717	default:
	718	assert(0);
	719	}
	720
	721	if (dest->disk1) {
	722	asprintf(&cmd, "%s %s", cmd, dest->disk1->path);
	723	}
	724
	725	if (dest->disk2) {
	726	asprintf(&cmd, "%s %s", cmd, dest->disk2->path);
	727	}
	728
	729	int r = mysystem(cmd);
	730	free(cmd);
	731
	732	// Wait a moment until the device has been properly brought up
	733	if (r == 0) {
	734	unsigned int counter = 10;
	735	while (counter-- > 0) {
	736	sleep(1);
	737
fde37387 MT	738	// If the raid device has not yet been properly brought up,
	739	// opening it will fail with the message: Device or resource busy
	740	// Hence we will wait a bit until it becomes usable.
	741	FILE* f = fopen(dest->path, "r");
	742	if (f) {
	743	fclose(f);
4a0d9bef	744	break;
fde37387	745	}
4a0d9bef MT	746	}
	747	}
	748
	749	return r;
	750	}
	751
	752	int hw_stop_all_raid_arrays() {
	753	return mysystem("/sbin/mdadm --stop --scan");
	754	}