setup-disk.in 9.95 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
142
143
144
145
	local apkflags="--quiet --progress --update-cache --clean-protected"
	local pkgs=$(cat "$mnt"/var/lib/apk/world)
	pkgs="$pkgs acct linux-grsec alpine-base"
	
	apk add --root "$mnt" $apkflags --overlay-from-stdin \
		--repositories-file /etc/apk/repositories \
		$pkgs <$ovlfiles>/dev/null || return 1
146
	echo ""
147

148
	# make things bootable
149
	if [ -e "/sys/block/${rootdev#/dev/}/md" ]; then
150
151
152
153
154
155
156
157
		local md=${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/$md/slaves/*; do
158
159
160
			j=${i##*/}
			i=${j%[0-9]*}
			rootdisk="$rootdisk /dev/${i}"
161
162
		done
	fi
163

164
165
166
167
168
169
	if is_vmware; then
		pax_nouderef="pax_nouderef "
	else
		pax_nouderef=
	fi

170
171
172
173
174
175
	# create an extlinux.conf
	cat >"$mnt"/boot/extlinux.conf <<EOF
timeout 20
prompt 1
default grsec
label grsec
176
177
	kernel /boot/vmlinuz-grsec
	append initrd=/boot/initramfs-grsec root=$(uuid_or_device $rootdev) modules=sd-mod,usb-storage,ext3$raidmod ${pax_nouderef}quiet
178
EOF
179
180
181
182
183
	# fix the fstab
	enumerate_fstab "$mnt" >> "$mnt"/etc/fstab

	# install extlinux
	apk add -q syslinux
184
185
186
187
	extlinux -i $raidopt "$mnt"/boot/

	# unmount the partitions
	umount $(awk '{print $2}' /proc/mounts | grep ^"$mnt" | sort -r)
188

189
190
	# fix mbr for all disk devices
	for i in $rootdisk; do
191
192
193
194
		local errmsg
		echo "Writing MBR to $i"
		errmsg=$(dd if="$MBR" of=$i 2>&1) \
			|| echo "$errmsg"
195
	done
196
197
198
199
200
	echo ""
	echo "Installation is done. Please reboot."
	apk del -q syslinux
}

201
202
203
204
205
206
207
208
209
# 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
210
	# parse /proc/mounts for mounted devices
211
212
	for p in $(awk '$1 ~ /^\/dev\// {gsub("/dev/", "", $1); print $1}' \
			/proc/mounts); do
213
		[ "$p" = "$1" ] && return 0
Natanael Copa's avatar
Natanael Copa committed
214
		[ -e /sys/block/$1/$p ] && return 0
215
216
217
218
	done
	return 1
}

Natanael Copa's avatar
Natanael Copa committed
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
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
239
240
241
242
	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
243
244
245
246
247
248
249

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

	return 0
}

250
find_disks() {
Natanael Copa's avatar
Natanael Copa committed
251
	local p=
252
	for p in $(awk '$1 ~ /[0-9]+/ {print $4}' /proc/partitions); do
Natanael Copa's avatar
Natanael Copa committed
253
		is_available_disk $p && echo -n " $p"
254
255
256
	done
}

Natanael Copa's avatar
Natanael Copa committed
257
useall() {
258
	local rootdisk_dev="$1"
Natanael Copa's avatar
Natanael Copa committed
259
	local i size
260
261
262
263
264
265
266
267
268
269
270
271
272
	local boot_size=100 boot_part_type="83" 
	local swap_size=$(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

273
274
	dmesg -n1
	apk_add -q sfdisk e2fsprogs $raidpkg || return 1
275
276
277
278
279
280
281
282
283
284
285
286
	local root_size=$(( $(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 " /	${root_size}MB"
	echo ""
287
288
289
	if [ -n "$APKOVL" ]; then
		echo "System from $APKOVL will be restored"
	fi
290
291
292
293
294
295
	echo -n "WARNING: All contents of $rootdisk_dev will be erased. Continue? [y/N]: "
	read i
	case "$i" in
		y*|Y*);;
		*) return 1;;
	esac
296
297
	
	echo "Initializing partitions..."
298
299
300
301
302
303
304
	if [ -n "$USE_RAID" ]; then
		local rd
		for rd in md0 md1 md2; do
			[ -b /dev/$rd ] && mdadm --stop /dev/$rd
		done
	fi

305
306
307
308
309
310
	# 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

311
312
313
314
315
316
	# create new partitions
	(cat <<EOF
0,$boot_size,$boot_part_type,*
,$swap_size,$swap_part_type
,,$root_part_type
EOF
317
	) | sfdisk -q -L -uM $rootdisk_dev >>/tmp/sfdisk.out || return 1
318
319

	# create device nodes if not exist
Natanael Copa's avatar
Natanael Copa committed
320
321
	mdev -s

322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
	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
361
	echo -e "$(uuid_or_device $swap_dev)\tswap\t\tswap\tdefaults 0 0" >> /etc/fstab
362
	install_mounted_root /mnt
Natanael Copa's avatar
Natanael Copa committed
363
364
}

365
# Parse args
366
while getopts "ro:" opt; do
367
368
	case $opt in
		r) USE_RAID=1;;
369
		o) APKOVL="$OPTARG";;
370
371
372
373
	esac
done
shift $(( OPTIND - 1))

374
375
if [ -d "$1" ]; then
	# install to given mounted root
376
	install_mounted_root "${1%/}"
377
378
379
	exit $?
fi

380
disks=$(find_disks)
Natanael Copa's avatar
Natanael Copa committed
381
382
383
384

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

385
386
387
388
389
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/$j/device" ]; then
Natanael Copa's avatar
Natanael Copa committed
390
			echo "$i is not a suitable for partitioning"
391
392
393
394
395
			exit 1
		fi
	done

else
396
	set -- $disks
397
398
399
	rootdisk=
	while ! in_list "$rootdisk" $disks "none" "abort"; do
		echo "Available disks are: $disks"
400
401
		echon "Which one is the root disk? (or none) [$1] "
		default_read rootdisk $1
402
403
404
405
406
	done
	case "$rootdisk" in
		none|abort) exit 0;;
	esac
fi
Natanael Copa's avatar
Natanael Copa committed
407

408
409
410
411
412
413
414
415
416
417
#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
418

419
rootdisk_dev=${rootdisk_dev:-"/dev/$rootdisk"}
Natanael Copa's avatar
Natanael Copa committed
420

421
422
if ! [ -b "$rootdisk_dev" ]; then
	echo "$rootdisk_dev is not a block device" >&2
Natanael Copa's avatar
Natanael Copa committed
423
424
425
	exit 1
fi

426
useall $rootdisk_dev