setup-disk.in 8.29 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 26 27 28 29 30 31 32 33 34 35 36 37 38
# 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=
	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
39
enumerate_fstab() {
40
	local mnt="$1"
41
	local fs_spec= fs_file= fs_vfstype= fs_mntops= fs_freq= fs_passno=
42
	[ -z "$mnt" ] && return
43 44
	local escaped_mnt=$(echo $mnt | sed 's:/:\\/:g')
	awk "\$2 ~ /^$escaped_mnt/ {print \$0}" /proc/mounts | \
45 46 47 48
		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
49 50
}

51 52 53 54 55
is_vmware() {
	grep -q VMware /proc/scsi/scsi 2>/dev/null \
		|| grep -q VMware /proc/ide/hd*/model 2>/dev/null
}

56 57
install_mounted_root() {
	local mnt="$1"
58
	local features="ata base bootchart cdrom ext2 ext3 ide scsi usb"
59

60
	rootdev=$(awk "\$2 == \"$mnt\" { print \$1 }" /proc/mounts)
61 62 63 64 65
	if [ -z "$rootdev" ]; then
		echo "$mnt does not seem to be a mount point" >&2
		return 1
	fi

66 67 68 69 70 71
	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
		
72 73 74 75
	rootdisk=${rootdev%[0-9]*}

	echon "Installing system on $rootdev: "
	lbu package - | tar -C "$mnt" -zx
76 77 78 79
	# 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/

80 81
	apk add -q --progress --update-cache --root "$mnt" \
		$(cat "$mnt"/var/lib/apk/world) \
82
		acct linux-grsec alpine-base >/dev/null || return 1
83 84 85
	echo ""
	# make things bootable
	kernel=$(ls "$mnt"/lib/modules)
86 87 88 89 90 91 92 93 94
	if [ "$rootdisk" = "/dev/md" ]; then
		local md=${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/$md/slaves/*; do
95 96 97
			j=${i##*/}
			i=${j%[0-9]*}
			rootdisk="$rootdisk /dev/${i}"
98 99
		done
	fi
100

101 102 103 104 105 106
	if is_vmware; then
		pax_nouderef="pax_nouderef "
	else
		pax_nouderef=
	fi

107 108 109 110 111 112
	# create an extlinux.conf
	cat >"$mnt"/boot/extlinux.conf <<EOF
timeout 20
prompt 1
default grsec
label grsec
113 114
	kernel /boot/vmlinuz-grsec
	append initrd=/boot/initramfs-grsec root=$(uuid_or_device $rootdev) modules=sd-mod,usb-storage,ext3$raidmod ${pax_nouderef}quiet
115
EOF
116 117 118 119 120
	# fix the fstab
	enumerate_fstab "$mnt" >> "$mnt"/etc/fstab

	# install extlinux
	apk add -q syslinux
121 122 123 124
	extlinux -i $raidopt "$mnt"/boot/

	# unmount the partitions
	umount $(awk '{print $2}' /proc/mounts | grep ^"$mnt" | sort -r)
125

126 127
	# fix mbr for all disk devices
	for i in $rootdisk; do
128 129 130 131
		local errmsg
		echo "Writing MBR to $i"
		errmsg=$(dd if="$MBR" of=$i 2>&1) \
			|| echo "$errmsg"
132
	done
133 134 135 136 137
	echo ""
	echo "Installation is done. Please reboot."
	apk del -q syslinux
}

138 139 140 141 142 143 144 145 146 147 148


# 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
149
	# parse /proc/mounts for mounted devices
150 151
	for p in $(awk '$1 ~ /^\/dev\// {gsub("/dev/", "", $1); print $1}' \
			/proc/mounts); do
152
		[ "$p" = "$1" ] && return 0
Natanael Copa's avatar
Natanael Copa committed
153
		[ -e /sys/block/$1/$p ] && return 0
154 155 156 157
	done
	return 1
}

Natanael Copa's avatar
Natanael Copa committed
158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185
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
	has_holders /sys/block/$b && return 1

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

	return 0
}

186
find_disks() {
Natanael Copa's avatar
Natanael Copa committed
187
	local p=
188
	for p in $(awk '$1 ~ /[0-9]+/ {print $4}' /proc/partitions); do
Natanael Copa's avatar
Natanael Copa committed
189
		is_available_disk $p && echo -n " $p"
190 191 192
	done
}

Natanael Copa's avatar
Natanael Copa committed
193
useall() {
194 195

	local rootdisk_dev="$1"
Natanael Copa's avatar
Natanael Copa committed
196
	local i size
197 198 199 200 201 202 203 204 205 206 207 208 209
	local boot_size=100 boot_part_type="83" 
	local swap_size=$(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

210 211
	dmesg -n1
	apk_add -q sfdisk e2fsprogs $raidpkg || return 1
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
	local root_size=$(( $(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 ""
	echo -n "WARNING: All contents of $rootdisk_dev will be erased. Continue? [y/N]: "
	read i
	case "$i" in
		y*|Y*);;
		*) return 1;;
	esac
230 231
	
	echo "Initializing partitions..."
232 233 234 235 236 237 238
	if [ -n "$USE_RAID" ]; then
		local rd
		for rd in md0 md1 md2; do
			[ -b /dev/$rd ] && mdadm --stop /dev/$rd
		done
	fi

239 240 241 242 243 244
	# 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

245 246 247 248 249 250
	# create new partitions
	(cat <<EOF
0,$boot_size,$boot_part_type,*
,$swap_size,$swap_part_type
,,$root_part_type
EOF
251
	) | sfdisk -q -L -uM $rootdisk_dev >>/tmp/sfdisk.out || return 1
252 253

	# create device nodes if not exist
Natanael Copa's avatar
Natanael Copa committed
254 255
	mdev -s

256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294
	if [ -n "$USE_RAID" ]; then
		local p= rd=
		for p in $(sfdisk -l $rootdisk_dev 2>/dev/null \
				| awk '/Linux raid/ {print $1}'); do
			case "$p" in
				*1) rd=/dev/md0; boot_dev=/dev/md0;;
				*2) rd=/dev/md1; swap_dev=/dev/md1;;
				*3) rd=/dev/md2; root_dev=/dev/md2;;
			esac
			mdadm --create $rd --level=1 --raid-devices=2 \
				--quiet --run $p missing
		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
295
	echo -e "$(uuid_or_device $swap_dev)\tswap\t\tswap\tdefaults 0 0" >> /etc/fstab
296
	install_mounted_root /mnt
Natanael Copa's avatar
Natanael Copa committed
297 298
}

299 300 301 302 303 304 305 306
# Parse args
while getopts "r" opt; do
	case $opt in
		r) USE_RAID=1;;
	esac
done
shift $(( OPTIND - 1))

307 308
if [ -d "$1" ]; then
	# install to given mounted root
309
	install_mounted_root "${1%/}"
310 311 312
	exit $?
fi

313
disks=$(find_disks)
Natanael Copa's avatar
Natanael Copa committed
314 315 316 317

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

318 319 320 321 322
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/$j/device" ]; then
323
			echo "$i is not a suitable for partitioning"
324 325 326 327 328
			exit 1
		fi
	done

else
329
	set -- $disks
330 331 332
	rootdisk=
	while ! in_list "$rootdisk" $disks "none" "abort"; do
		echo "Available disks are: $disks"
333 334
		echon "Which one is the root disk? (or none) [$1] "
		default_read rootdisk $1
335 336 337 338 339
	done
	case "$rootdisk" in
		none|abort) exit 0;;
	esac
fi
Natanael Copa's avatar
Natanael Copa committed
340

341 342 343 344 345 346 347 348 349 350
#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
351

352
rootdisk_dev=${rootdisk_dev:-"/dev/$rootdisk"}
Natanael Copa's avatar
Natanael Copa committed
353

354 355
if ! [ -b "$rootdisk_dev" ]; then
	echo "$rootdisk_dev is not a block device" >&2
Natanael Copa's avatar
Natanael Copa committed
356 357 358
	exit 1
fi

359
useall $rootdisk_dev