setup-disk.in 10.1 KB
Newer Older
Natanael Copa's avatar
Natanael Copa committed
1 2 3 4 5
#!/bin/sh

PREFIX=
. "$PREFIX/lib/libalpine.sh"

6
MBR=${MBR:-"/usr/share/syslinux/mbr.bin"}
Natanael Copa's avatar
Natanael Copa committed
7 8 9 10 11 12 13 14 15 16 17

in_list() {
	local i="$1"
	shift
	while [ $# -gt 0 ]; do
		[ "$i" = "$1" ] && return 0
		shift
	done
	return 1
}

18 19 20 21 22 23 24 25
# wrapper to only show given device
_blkid() {
	blkid | grep "^$1:"
}

# if given device have an UUID display it, otherwise return the device
uuid_or_device() {
	local i=
26 27 28
	case "$1" in
		/dev/md*) echo "$1" && return 0;;
	esac
29 30 31 32 33 34 35 36 37 38 39 40 41
	for i in $(_blkid "$1"); do
		case "$i" in
			UUID=*) eval $i;;
		esac
	done
	if [ -n "$UUID" ]; then
		echo "UUID=$UUID"
	else
		echo "$1"
	fi
}

# generate an fstab from a given mountpoint. Convert to UUID if possible
42
enumerate_fstab() {
43
	local mnt="$1"
44
	local fs_spec= fs_file= fs_vfstype= fs_mntops= fs_freq= fs_passno=
45
	[ -z "$mnt" ] && return
46 47
	local escaped_mnt=$(echo $mnt | sed 's:/:\\/:g')
	awk "\$2 ~ /^$escaped_mnt/ {print \$0}" /proc/mounts | \
48 49 50 51
		sed "s:$mnt:/:g; s: :\t:g" | sed 's:/\+:/:g' | \
		while read fs_spec fs_file fs_vfstype fs_mntops fs_freq fs_passno; do
			echo -e "$(uuid_or_device $fs_spec)\t${fs_file}\t${fs_vfstype}\t${fs_mntops} ${fs_freq} ${fs_passno}"
		done
52 53
}

54 55 56 57 58
is_vmware() {
	grep -q VMware /proc/scsi/scsi 2>/dev/null \
		|| grep -q VMware /proc/ide/hd*/model 2>/dev/null
}

59 60
# Find the disk device from given partition
disk_from_part() {
61 62
	# we need convert cciss/c0d0* cciss!c0d0*...
	local i= part=$(echo ${1#/dev/} | sed 's:/:!:g')
63 64
	for i in /sys/block/*/$part; do
		i=${i%/*}
65 66
		# ...and back from cciss!c0d0 to cciss/c0d0
		echo "/dev/${i##*/}" | sed 's:!:/:g'
67 68 69 70 71
		return 0
	done
	return 1
}

72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
unpack_apkovl() {
	local ovl="$1"
	local dest="$2"
	local suffix=${ovl##*.}
	local i
	ovlfiles=/tmp/ovlfiles
	if [ "$suffix" = "gz" ]; then
		if ! tar -C "$dest" --numeric-owner -zxvf "$ovl" > $ovlfiles; then
			echo -n "Continue anyway? [Y/n]: "
			read i
			case "$i" in
				n*|N*) return 1;;
			esac
		fi
		return 0 
	fi

	apk add -q openssl

	if ! openssl list-cipher-commands | grep "^$suffix$" > /dev/null; then
		errstr="Cipher $suffix is not supported"
		return 1
	fi
	local count=0
	# beep
	echo -e "\007"
	while [ $count -lt 3 ]; do
		openssl enc -d -$suffix -in "$ovl" | tar --numeric-owner \
			-C "$dest" -zxv >$ovlfiles 2>/dev/null && return 0
		count=$(( $count + 1 ))
	done
	ovlfiles=
	return 1
}

107 108
install_mounted_root() {
	local mnt="$1"
109
	local features="ata base bootchart cdrom ext2 ext3 ide scsi usb"
110

111
	rootdev=$(awk "\$2 == \"$mnt\" { print \$1 }" /proc/mounts)
112 113 114 115 116
	if [ -z "$rootdev" ]; then
		echo "$mnt does not seem to be a mount point" >&2
		return 1
	fi

117 118 119 120 121 122
	local fs=$(awk "\$1 == \"$rootdev\" {print \$3}" /proc/mounts)
	if [ "$fs" != "ext2" ] && [ "$fs" != "ext3" ]; then
		echo "$fs is not supported. Only ext2 and ext3 are supported" >&2
		return 1
	fi
		
123
	rootdisk=$(disk_from_part $rootdev)
124

125
	if [ -z "$APKOVL" ]; then
126 127
		ovlfiles=/tmp/ovlfiles
		lbu package - | tar -C "$mnt" -zxv > "$ovlfiles"
128 129
	else
		echo "Restoring backup from $APKOVL to $rootdev..."
130
		unpack_apkovl "$APKOVL" "$mnt" || return 1
131
	fi
132 133
	# remove the installed db in case its there so we force re-install
	rm -f "$mnt"/var/lib/apk/installed
134
	echon "Installing system on $rootdev: "
135 136 137 138
	# apk reads config from target root so we need to copy the config
	mkdir -p "$mnt"/etc/apk/keys/
	cp /etc/apk/keys/* "$mnt"/etc/apk/keys/

139 140 141
	local apkflags="--quiet --progress --update-cache --clean-protected"
	local pkgs=$(cat "$mnt"/var/lib/apk/world)
	pkgs="$pkgs acct linux-grsec alpine-base"
142 143 144 145 146
	local repos=$(sed -e 's/\#.*//' /etc/apk/repositories)
	local repoflags=
	for i in $repos; do
		repoflags="$repoflags --repository $i"
	done
147 148
	
	apk add --root "$mnt" $apkflags --overlay-from-stdin \
149
		$repoflags $pkgs <$ovlfiles>/dev/null || return 1
150
	echo ""
151

152
	# make things bootable
153
	if [ -e "/sys/block/${rootdev#/dev/}/md" ]; then
154 155 156 157 158 159 160 161
		local md=${rootdev#/dev/}
		features="$features raid"
		raidmod=$(cat /sys/block/$md/md/level)
		raidmod=",$raidmod"
		raidopt="-r"
		# get a list of slaves
		rootdisk=
		for i in /sys/block/$md/slaves/*; do
162 163 164
			j=${i##*/}
			i=${j%[0-9]*}
			rootdisk="$rootdisk /dev/${i}"
165 166
		done
	fi
167

168 169 170 171 172 173
	if is_vmware; then
		pax_nouderef="pax_nouderef "
	else
		pax_nouderef=
	fi

174 175 176 177 178 179
	# create an extlinux.conf
	cat >"$mnt"/boot/extlinux.conf <<EOF
timeout 20
prompt 1
default grsec
label grsec
180 181
	kernel /boot/vmlinuz-grsec
	append initrd=/boot/initramfs-grsec root=$(uuid_or_device $rootdev) modules=sd-mod,usb-storage,ext3$raidmod ${pax_nouderef}quiet
182
EOF
183 184 185 186 187
	# fix the fstab
	enumerate_fstab "$mnt" >> "$mnt"/etc/fstab

	# install extlinux
	apk add -q syslinux
188 189 190 191
	extlinux -i $raidopt "$mnt"/boot/

	# unmount the partitions
	umount $(awk '{print $2}' /proc/mounts | grep ^"$mnt" | sort -r)
192

193 194
	# fix mbr for all disk devices
	for i in $rootdisk; do
195 196 197 198
		local errmsg
		echo "Writing MBR to $i"
		errmsg=$(dd if="$MBR" of=$i 2>&1) \
			|| echo "$errmsg"
199
	done
200 201 202 203 204
	echo ""
	echo "Installation is done. Please reboot."
	apk del -q syslinux
}

205 206 207 208 209 210 211 212 213
# figure out decent default swap size in mega bytes
find_swap_size() {
	local memtotal_kb=$(awk '$1 == "MemTotal:" {print $2}' /proc/meminfo)
	# use 2 * avaiable ram
	echo $(( $memtotal_kb * 2 / 1024 ))
}

has_mounted_part() {
	local p
Natanael Copa's avatar
Natanael Copa committed
214
	# parse /proc/mounts for mounted devices
215 216
	for p in $(awk '$1 ~ /^\/dev\// {gsub("/dev/", "", $1); print $1}' \
			/proc/mounts); do
217
		[ "$p" = "$1" ] && return 0
Natanael Copa's avatar
Natanael Copa committed
218
		[ -e /sys/block/$1/$p ] && return 0
219 220 221 222
	done
	return 1
}

Natanael Copa's avatar
Natanael Copa committed
223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
has_holders() {
	local i
	# check if device is used by any md devices
	for i in $1/holders/* $1/*/holders/*; do
		[ -e "$i" ] && return 0
	done
	return 1
}

is_available_disk() {
	local dev=$1
	local b=$(echo $p | sed 's:/:!:g')

	# check if its a "root" block device and not a partition
	[ -e /sys/block/$b ] || return 1
	
	# check so it does not have mounted partitions
	has_mounted_part $dev && return 1

	# check so its not part of an md setup
243 244 245 246
	if has_holders /sys/block/$b; then
		[ -n "$USE_RAID" ] && echo "Warning: $dev is part of a running raid" >&2
		return 1
	fi
Natanael Copa's avatar
Natanael Copa committed
247 248 249 250 251 252 253

	# check so its not an md device
	[ -e /sys/block/$b/md ] && return 1

	return 0
}

254
find_disks() {
Natanael Copa's avatar
Natanael Copa committed
255
	local p=
256
	for p in $(awk '$1 ~ /[0-9]+/ {print $4}' /proc/partitions); do
Natanael Copa's avatar
Natanael Copa committed
257
		is_available_disk $p && echo -n " $p"
258 259 260
	done
}

Natanael Copa's avatar
Natanael Copa committed
261
useall() {
262
	local rootdisk_dev="$1"
Natanael Copa's avatar
Natanael Copa committed
263
	local i size
264 265 266 267 268 269 270 271 272 273 274 275 276
	local boot_size=100 boot_part_type="83" 
	local swap_size=$(find_swap_size) swap_part_type="82"
	local root_part_type="83"
	local raidpkg= partitions=
	local minimum_root_size=$(($boot_size * 2));

	if [ -n "$USE_RAID" ]; then
		boot_part_type="fd"
		swap_part_type="fd"
		root_part_type="fd"
		raidpkg="mdadm"
	fi

277 278
	dmesg -n1
	apk_add -q sfdisk e2fsprogs $raidpkg || return 1
279 280 281 282 283 284 285 286 287 288 289 290
	local root_size=$(( $(sfdisk -s $rootdisk_dev) / 1024 - $swap_size - $boot_size))
	if [ "$root_size" -lt "$minimum_root_size" ]; then
		echo "The $rootdisk_dev is too small. At least $(( $boot_size + $swap_size + $minimum_root_size)) is needed." >&2
		return 1
	fi

	echo ""
	echo "Creating the following partitions on $rootdisk_dev:"
	echo " /boot	${boot_size}MB"
	echo " swap	${swap_size}MB"
	echo " /	${root_size}MB"
	echo ""
291 292 293
	if [ -n "$APKOVL" ]; then
		echo "System from $APKOVL will be restored"
	fi
294 295 296 297 298 299
	echo -n "WARNING: All contents of $rootdisk_dev will be erased. Continue? [y/N]: "
	read i
	case "$i" in
		y*|Y*);;
		*) return 1;;
	esac
300 301
	
	echo "Initializing partitions..."
302 303 304 305 306 307 308
	if [ -n "$USE_RAID" ]; then
		local rd
		for rd in md0 md1 md2; do
			[ -b /dev/$rd ] && mdadm --stop /dev/$rd
		done
	fi

309 310 311 312 313 314
	# new disks does not have an DOS signature in sector 0
	# this makes sfdisk complain. We can workaround this by letting
	# fdisk create that DOS signature, by just do a "w", a write.
	# http://bugs.alpinelinux.org/issues/show/145
	echo "w" | fdisk $rootdisk_dev >/dev/null

315 316 317 318 319 320
	# create new partitions
	(cat <<EOF
0,$boot_size,$boot_part_type,*
,$swap_size,$swap_part_type
,,$root_part_type
EOF
321
	) | sfdisk -q -L -uM $rootdisk_dev >>/tmp/sfdisk.out || return 1
322 323

	# create device nodes if not exist
Natanael Copa's avatar
Natanael Copa committed
324 325
	mdev -s

326 327 328 329
	if [ -n "$USE_RAID" ]; then
		local p= rd=
		for p in $(sfdisk -l $rootdisk_dev 2>/dev/null \
				| awk '/Linux raid/ {print $1}'); do
330
			local opt="--metadata=0.90"
331 332
			case "$p" in
				*1) rd=/dev/md0; boot_dev=/dev/md0;;
333 334
				*2) rd=/dev/md1; swap_dev=/dev/md1
				    opt= ;;
335 336 337
				*3) rd=/dev/md2; root_dev=/dev/md2;;
			esac
			mdadm --create $rd --level=1 --raid-devices=2 \
338
				$opt --quiet --run $p missing
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366
		done
	else
		local p=
		for p in $(sfdisk -l $rootdisk_dev 2>/dev/null \
				| awk '$1 ~ /^\/dev/ {print $1}'); do
			case "$p" in
				*1) boot_dev=$p;;
				*2) swap_dev=$p;;
				*3) root_dev=$p;;
			esac
		done
	fi
	mkfs.ext3 -q $boot_dev >/dev/null \
		&& mkswap $swap_dev >/dev/null \
		&& mkfs.ext3 -q >/dev/null $root_dev \
		|| return 1

	mkdir -p /mnt
	mount -t ext3 $root_dev /mnt || return 1
	mkdir -p /mnt/boot
	mount -t ext3 $boot_dev /mnt/boot || return 1
	if [ -n "$USE_RAID" ]; then
		mdadm --detail --scan > /etc/mdadm.conf
		rc-update --quiet add mdadm-raid boot
	fi
	rc-update --quiet add swap boot
	# the func to generate fstab does not detect swap. add it manually
	sed -i -e '/swap/d' /etc/fstab
367
	echo -e "$(uuid_or_device $swap_dev)\tswap\t\tswap\tdefaults 0 0" >> /etc/fstab
368
	install_mounted_root /mnt
Natanael Copa's avatar
Natanael Copa committed
369 370
}

371
# Parse args
372
while getopts "ro:" opt; do
373 374
	case $opt in
		r) USE_RAID=1;;
375
		o) APKOVL="$OPTARG";;
376 377 378 379
	esac
done
shift $(( OPTIND - 1))

380 381
if [ -d "$1" ]; then
	# install to given mounted root
382
	install_mounted_root "${1%/}"
383 384 385
	exit $?
fi

386
disks=$(find_disks)
Natanael Copa's avatar
Natanael Copa committed
387 388 389 390

# no disks so lets exit quietly.
[ -z "$disks" ] && exit 0

391 392 393 394 395
if [ $# -gt 0 ]; then
	# check that they are 
	for i in "$@"; do
		j=$(readlink -f "$i" | sed 's:^/dev/::; s:/:!:g')
		if ! [ -e "/sys/block/$j/device" ]; then
Natanael Copa's avatar
Natanael Copa committed
396
			echo "$i is not a suitable for partitioning"
397 398 399 400 401
			exit 1
		fi
	done

else
402
	set -- $disks
403 404 405
	rootdisk=
	while ! in_list "$rootdisk" $disks "none" "abort"; do
		echo "Available disks are: $disks"
406 407
		echon "Which one is the root disk? (or none) [$1] "
		default_read rootdisk $1
408 409 410 411 412
	done
	case "$rootdisk" in
		none|abort) exit 0;;
	esac
fi
Natanael Copa's avatar
Natanael Copa committed
413

414 415 416 417 418 419 420 421 422 423
#echon "Do you want use *all* of $rootdisk for Alpine? (y/n) [n] "
#default_read useall "n"
#case "$useall" in
#	[Yy]*) useall="yes";;
#esac
#
#if [ "x$useall" != "xyes" ]; then
#	echo "Only 'use all' option is available at the moment. Sorry"
#	exit 1
#fi
Natanael Copa's avatar
Natanael Copa committed
424

425
rootdisk_dev=${rootdisk_dev:-"/dev/$rootdisk"}
Natanael Copa's avatar
Natanael Copa committed
426

427 428
if ! [ -b "$rootdisk_dev" ]; then
	echo "$rootdisk_dev is not a block device" >&2
Natanael Copa's avatar
Natanael Copa committed
429 430 431
	exit 1
fi

432
useall $rootdisk_dev