slitaz-boot-scripts view init @ rev 469
init: fix loopfs
| author | Pascal Bellard <pascal.bellard@slitaz.org> |
|---|---|
| date | Wed May 26 19:47:08 2021 +0000 (2021-05-26) |
| parents | f92ced20dc0d |
| children | 3e887b1a369a |
line source
1 #!/bin/sh
3 ### cached kernel parameters :
4 #
5 # modprobe=
6 # list of modules to load, example modprobe=r8169,btrfs
7 #
8 ### Frugal mode or live CD : using a root ram disk.
9 #
10 # tmpram= [RAMDISK]
11 # minimum % of free RAM to build the root tmpfs, default 100
12 # a lower value may work, such as 50
13 # rootfssize= [RAMDISK]
14 # size of / regarding the RAM size, default 90%
15 # rootfsinodes= [RAMDISK]
16 # files count of / regarding the RAM size
17 #
18 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
19 ### Any rootfs should fit, minimum required is slitaz-base.
20 #
21 # mount= [MOUNT]
22 # device with root loop file or sub directory
23 # posixovl [MOUNT]
24 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
25 # loopfs= [MOUNT]
26 # loop file for root filesystem
27 # subroot= [MOUNT]
28 # sub directory for root filesystem
29 # bindfs= [MOUNT] (deprecated)
30 # bind out of root tree part
31 #
32 # extra= [MOUNT]
33 # extra initrd files list to load
34 #
35 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
36 #
37 # dmraid= [RAID]
38 # root semi hardware raid device name in /dev/mapper
39 # softraid= [RAID]
40 # root software device name in /dev/mapper
41 # lvmroot= [LVM]
42 # root logical volume name in /dev/mapper
43 # cryptoroot= [CRYPTO]
44 # encrypted root device using luks or loop-aes
45 #
46 ### Special mode used by loram flavor with aufs/overlayfs & squashfs
47 ### incremental/nested rootfs (russian dolls).
48 #
49 # rodev= [LORAM][MERGE]
50 # device (+ optional path) for the read only aufs branch
51 # rwdev= [LORAM][MERGE]
52 # (persistent) device for the r/w aufs branch instead of the ramfs
53 # isofs [LORAM]
54 # do not use squashfs filesystem images, but the cdrom filesystem only
57 fail() {
58 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
59 }
62 quit() {
63 [ -d /mnt$4/etc ] || return
64 grep -q serial /proc/ioports && ! grep -q ttyS /mnt$4/etc/inittab &&
65 echo "ttyS0::respawn:/sbin/getty 115200,38400,9600,4800,2400 ttyS0" \
66 >> /mnt$4/etc/inittab
67 [ -n "$4" ] || grep -q 'tmpfs /mnt tmpfs' /proc/mounts ||
68 busybox mount /mnt -o remount,ro
69 busybox mount --move /run /mnt/${1:-run}
70 cat > /run/init <<EOT
71 $2
72 x=/sbin/switch_root
73 [ -x \$x ] && exec \$x mnt $3 /sbin/init
74 EOT
75 fail 2mDone
76 exit
77 }
80 arg() {
81 grep -q $1 /proc/cmdline
82 }
85 got() {
86 arg $1= && root="$(sed "s/.*$1=\\([^ ]*\\).*/\\1/" </proc/cmdline)"
87 }
90 msg() {
91 echo "Switching / to $1..."
92 }
95 use() {
96 got $1 && msg "$1 $root"
97 }
100 bbmnt() {
101 r=$(busybox blkid 2> /dev/null | grep "$root[:\"]" | sed 's|:.*||;q')
102 r=${r:-$root}
103 if [ ! -b $r ]; then
104 r=${r#/dev/}
105 r=/dev/${r%%/*}
106 fi
107 d=${root#*$r}
108 t=$(busybox blkid 2> /dev/null | grep "$root[:\"]" | sed '/ TYPE=/!d;s/.* TYPE="//;s/".*//')
109 busybox mount $r $1 ${t:+-t $t}
110 }
113 mnt() {
114 bbmnt $1 && return
115 w=$(cat /sys/module/usb_storage/parameters/delay_use)
116 w=$((1+${w:-2}))
117 echo "Sleep $w seconds..."
118 sleep $w
119 bbmnt $1
120 }
123 mod() {
124 for i in $@; do
125 grep -q "^$i\\W" /proc/modules && continue
126 grep -q "\\W$i\$" /proc/filesystems && continue
127 echo "Loading module: $i"
128 modprobe $i 2>/dev/null ||
129 for j in $(find /lib/modules /mnt/.fs*/lib/modules|sed "/\/$i.ko/!d" 2> /dev/null); do
130 busybox insmod $j && break
131 done
132 done
133 }
136 try() {
137 if [ ! -d /mnt/etc ] && got cryptoroot; then
138 mod dm-mod dm-crypt aes-256
139 d=${root#/dev/}
140 l=crypto-$d
141 if cryptsetup isLuks $root 2>/dev/null; then
142 cryptsetup luksOpen $root $l
143 else
144 read -st 60 -p "Pass phrase : " p
145 k=$(echo $p|hashalot -x -n 32 sha512)
146 echo 0 $(cat $(find /sys/block|grep /$d/size))\
147 crypt aes-plain $k 0 $root 0|dmsetup create $l
148 fi
149 busybox mount /dev/mapper/$l /mnt
150 fi
151 got subroot && return
152 got loopfs && return
153 if [ -d /mnt/etc ]; then
154 for i in $@; do
155 cp -a $i /mnt$(dirname $i)
156 done
157 quit
158 fi
159 fail
160 }
163 lvm() {
164 use lvmroot || return
165 mod dm-mod
166 vgscan --ignorelockingfailure
167 vgchange -ay --ignorelockingfailure
168 busybox mount /dev/mapper/$root /mnt
169 try /dev/mapper $1
170 }
173 ldraid() {
174 while read l; do
175 case "$l" in
176 *raid10*) mod raid10;;
177 *raid0*) mod raid0;;
178 *raid1*) mod raid1;;
179 *raid*) mod raid456;;
180 *mirror*) mod dm-mirror;;
181 esac
182 done
183 }
186 mntiso() {
187 umnt=
188 if got mount; then
189 dev=$root
190 x=$(busybox blkid|grep $dev|sed 's/:.*//;q')
191 root=${x:-$dev}
192 [ "$dev" = "$root" ] || dev="$root ($dev)"
193 echo "Mount $dev..."
194 mnt $1
195 umnt=" $umnt $1"
196 arg posixovl && echo "And posixovl..." && umnt=" $umnt $1" &&
197 mount.posixovl -F $1 -- -oallow_other -odefault_permissions -osuid
198 fi
199 got loopfs && echo "Into file $root..." && umnt=" $umnt $1" &&
200 losetup /dev/loop0 $1/$root && root=/dev/loop0 && mnt $1
201 [ -z "$umnt" ] && mnt $1
202 got bindfs && echo "Bind ${root/,/ to }..." &&
203 busybox mount --bind $1/${root%,*} $1/${root/,//}
204 true
205 }
209 if [ "$1" != 'log' ]; then
210 busybox mount -t proc proc /proc
211 busybox mount -t sysfs sys /sys
212 busybox mount -t tmpfs tmpfs /run
213 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
214 $0 log 2>&1 | tee /run/boot.log
215 busybox umount /sys
216 busybox umount /proc
217 . /run/init
218 sh
219 fi
221 mdev -s 2> /dev/null ||
222 for i in /sys/block/*/dev /sys/block/*/*/dev ; do
223 [ -s "$i" ] || continue
224 n=${i%/dev}
225 n=/dev/${n##*/}
226 [ -e $n ] && continue
227 echo "Create $n "
228 mknod $n b $(sed 's/:/ /' < $i)
229 done
231 got modprobe && mod ${root//,/ }
233 [ -d /proc/sys/dev/cdrom ] &&
234 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
236 if use dmraid; then
237 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
238 [ ${root:0:4} = /dev ] ||
239 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
240 dmraid -ay
241 fi
242 use raiddev && raiddev="DEVICE ${root//,/ }"
243 use raidmail && raidmail="MAILADDR $root"
244 if use softraid; then
245 for i in 1 2 3 4 5 6 7 8 9; do
246 mdadm -E -s -c partitions > /etc/mdadm.conf
247 grep -qs " $root " /etc/mdadm.conf && break
248 sleep $i
249 done
250 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
251 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
252 grep level=raid /etc/mdadm.conf | ldraid
253 udevd --daemon
254 udevadm trigger
255 udevadm settle
256 for i in 1 2 3 4 5 6 7 8 9; do
257 sleep $i
258 mdadm -A -s
259 for j in $(sed '/\/md/!d;s|.*md/*\([0-9]*\).*|md\1|' \
260 /etc/mdadm.conf); do
261 grep -qs "$j : act" /proc/mdstat || continue 2
262 done
263 break
264 done
265 grep -qs "^$(basename $root) : act" /proc/mdstat ||
266 root=$(awk '/^md/ { print "/dev/" $1; exit }' < /proc/mdstat)
267 lvm /etc/mdadm.conf
268 fi
269 lvm
271 got extra && extra=$root && mntiso /mnt && for i in ${extra//,/ }; do
272 (unlzma < /mnt/$i 2>/dev/null || zcat /mnt/$i) | cpio -idmu
273 done && for i in $umnt; do umount -l $i; done
274 arg cryptoroot= && try
275 if use subroot; then
276 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
277 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
278 r=$root/run
279 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
280 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
281 fi
282 quit
283 msg tmpfs
284 root=100
285 got tmpram
286 r=$root
287 got rootfsinodes && inodes=",nr_inodes=$root"
288 root=90%
289 got rootfssize
290 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
291 busybox mount -t tmpfs -o size=$root$inodes tmpfs /mnt &&
292 export PATH=/mnt/bin:$PATH &&
293 for i in $(ls -a /); do
294 case "$i" in
295 .*|cdrom) ;;
296 mnt|proc|run|sys) mkdir /mnt/$i;;
297 dev) cp -a /$i /mnt;;
298 *) mv /$i /mnt; ln -s /mnt/$i / 2> /dev/null ||
299 LD_LIBRARY_PATH=/mnt/lib:/mnt/usr/lib:/lib:/usr/lib \
300 /mnt/lib/ld-linux.so.2 /mnt/bin/ln -s /mnt/$i /;;
301 esac
302 done || fail 3mSkipped
303 quit
304 mod squashfs 2>/dev/null || exit
305 msg aufs
306 br=/mnt/.rw
307 mkdir $br /mnt/.wd
308 got rwdev && mnt $br && br=$br$d
309 o=
310 p=
311 c=/mnt/.cdrom
312 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
313 root=/dev/cdrom/fs
314 got rodev
315 mkdir -p $c /mnt$c /mnt/.rw$c
316 mntiso $c
317 o="-o 124"
318 p=/.cdrom/boot
319 c=$c$d
320 fi
321 l=0
322 r=
323 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
324 fs=${i#*root}
325 r=$r:/mnt/.$fs
326 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
327 losetup $o /dev/loop$((++l)) $i
328 busybox mount -o ro -t squashfs /dev/loop$l /mnt/.$fs
329 done
330 while read type opt; do
331 mod $type || continue
332 busybox mount -t $type -o $opt none /mnt && break
333 done <<EOT
334 aufs br=$br$r
335 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
336 EOT
337 quit