slitaz-boot-scripts annotate init @ rev 427

init: keep tmpfs rw
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Mar 30 09:44:21 2016 +0200 (2016-03-30)
parents 09aba02ed71a
children 018eeb31a351
rev   line source
pascal@276 1 #!/bin/sh
pascal@276 2
paul@351 3 ### cached kernel parameters :
pascal@341 4 #
pascal@341 5 # modprobe=
pascal@341 6 # list of modules to load, example modprobe=r8169,btrfs
pascal@341 7 #
pascal@342 8 ### Frugal mode or live CD : using a root ram disk.
pascal@341 9 #
pascal@341 10 # tmpram= [RAMDISK]
pascal@341 11 # minimum % of free RAM to build the root tmpfs, default 100
pascal@341 12 # a lower value may work, such as 50
pascal@341 13 # rootfssize= [RAMDISK]
pascal@341 14 # size of / regarding the RAM size, default 90%
pascal@407 15 # rootfsinodes= [RAMDISK]
pascal@408 16 # files count of / regarding the RAM size, default 0 (unlimited)
pascal@341 17 #
pascal@342 18 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
pascal@342 19 ### Any rootfs should fit, minimum required is slitaz-base.
pascal@341 20 #
pascal@341 21 # mount= [MOUNT]
pascal@341 22 # device with root loop file or sub directory
pascal@341 23 # posixovl [MOUNT]
pascal@341 24 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
pascal@341 25 # loopfs= [MOUNT]
pascal@341 26 # loop file for root filesystem
pascal@341 27 # subroot= [MOUNT]
pascal@341 28 # sub directory for root filesystem
paul@351 29 # bindfs= [MOUNT] (deprecated)
pascal@341 30 # bind out of root tree part
pascal@341 31 #
pascal@342 32 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
pascal@341 33 #
pascal@341 34 # dmraid= [RAID]
pascal@341 35 # root semi hardware raid device name in /dev/mapper
pascal@341 36 # softraid= [RAID]
pascal@341 37 # root software device name in /dev/mapper
pascal@341 38 # lvmroot= [LVM]
pascal@341 39 # root logical volume name in /dev/mapper
pascal@341 40 # cryptoroot= [CRYPTO]
pascal@341 41 # encrypted root device using luks or loop-aes
pascal@341 42 #
pascal@418 43 ### Special mode used by loram flavor with aufs/overlayfs & squashfs
pascal@342 44 ### incremental/nested rootfs (russian dolls).
pascal@341 45 #
pascal@341 46 # rodev= [LORAM][MERGE]
pascal@341 47 # device (+ optional path) for the read only aufs branch
pascal@341 48 # rwdev= [LORAM][MERGE]
paul@351 49 # (persistent) device for the r/w aufs branch instead of the ramfs
pascal@341 50 # isofs [LORAM]
pascal@341 51 # do not use squashfs filesystem images, but the cdrom filesystem only
pascal@341 52
al@416 53
al@416 54 fail() {
al@416 55 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
pascal@278 56 }
pascal@278 57
al@416 58
al@416 59 quit() {
al@416 60 [ -d /mnt$4/etc ] || return
pascal@427 61 [ -n "$4" ] || grep -q 'tmpfs /mnt tmpfs' /proc/mounts ||
pascal@427 62 busybox mount /mnt -o remount,ro
al@416 63 busybox mount --move /run /mnt/${1:-run}
al@416 64 cat > /run/init <<EOT
pascal@314 65 $2
pascal@314 66 x=/sbin/switch_root
pascal@314 67 [ -x \$x ] && exec \$x mnt $3 /sbin/init
pascal@276 68 EOT
al@416 69 fail 2mDone
al@416 70 exit
pascal@276 71 }
pascal@276 72
al@416 73
al@416 74 arg() {
al@416 75 grep -q $1 /proc/cmdline
pascal@276 76 }
pascal@276 77
al@416 78
al@416 79 got() {
al@416 80 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
pascal@276 81 }
pascal@276 82
al@416 83
al@416 84 msg() {
al@416 85 echo "Switching / to $1..."
pascal@276 86 }
pascal@276 87
al@416 88
al@416 89 use() {
al@416 90 got $1 && msg "$1 $root"
pascal@276 91 }
pascal@276 92
al@416 93
al@416 94 mnt() {
al@416 95 r=$(busybox blkid 2> /dev/null | sed "s|\"||g;/${root//[^a-zA-Z0-9]/.}/!d;s|:.*||;q")
al@416 96 r=${r:-$root}
al@416 97 if [ ! -b $r ]; then
al@416 98 r=${r#/dev/}
al@416 99 r=/dev/${r%%/*}
al@416 100 fi
al@416 101 d=${root#*$r}
al@416 102 busybox mount $r $1 && return
al@416 103 w=$(cat /sys/module/usb_storage/parameters/delay_use)
al@416 104 w=$((1+${w:-2}))
al@416 105 echo -n "Sleep $w seconds..."
al@416 106 sleep $w
al@416 107 busybox mount $r $1
pascal@314 108 }
pascal@314 109
al@416 110
al@416 111 mod() {
al@416 112 for i in $@; do
al@416 113 echo "Loading module: $i"
al@416 114 modprobe $i 2>/dev/null || busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
al@416 115 done
pascal@314 116 }
pascal@314 117
al@416 118
al@416 119 try() {
al@416 120 if [ ! -d /mnt/etc ] && got cryptoroot; then
al@416 121 mod dm-mod dm-crypt aes-256
al@416 122 d=${root#/dev/}
al@416 123 l=crypto-$d
al@416 124 if cryptsetup isLuks $root 2>/dev/null; then
al@416 125 cryptsetup luksOpen $root $l
al@416 126 else
al@416 127 read -st 60 -p "Pass phrase : " p
al@416 128 k=$(echo $p|hashalot -x -n 32 sha512)
al@416 129 echo 0 $(cat $(find /sys/block|grep /$d/size))\
al@416 130 crypt aes-plain $k 0 $root 0|dmsetup create $l
al@416 131 fi
al@416 132 busybox mount /dev/mapper/$l /mnt
pascal@314 133 fi
al@416 134 got subroot && return
al@416 135 got loopfs && return
al@416 136 if [ -d /mnt/etc ]; then
al@416 137 for i in $@; do
al@416 138 cp -a $i /mnt$(dirname $i)
al@416 139 done
al@416 140 quit
al@416 141 fi
al@416 142 fail
pascal@314 143 }
pascal@314 144
al@416 145
al@416 146 lvm() {
al@416 147 use lvmroot || return
al@416 148 mod dm-mod
al@416 149 vgscan --ignorelockingfailure
al@416 150 vgchange -ay --ignorelockingfailure
al@416 151 busybox mount /dev/mapper/$root /mnt
al@416 152 try /dev/mapper $1
pascal@314 153 }
pascal@314 154
al@416 155
al@416 156 ldraid() {
al@416 157 while read l; do
al@416 158 case "$l" in
al@416 159 *raid10*) mod raid10;;
al@416 160 *raid0*) mod raid0;;
al@416 161 *raid1*) mod raid1;;
al@416 162 *raid*) mod raid456;;
al@416 163 *mirror*) mod dm-mirror;;
al@416 164 esac
al@416 165 done
pascal@276 166 }
pascal@276 167
al@416 168
al@416 169
al@416 170
al@416 171 if [ "$1" != 'log' ]; then
al@373 172 busybox mount -t proc proc /proc
al@373 173 busybox mount -t sysfs sys /sys
al@373 174 busybox mount -t tmpfs tmpfs /run
pascal@314 175 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
pascal@314 176 $0 log 2>&1 | tee /run/boot.log
pascal@410 177 busybox umount /sys
al@373 178 busybox umount /proc
pascal@310 179 . /run/init
pascal@314 180 sh
pascal@314 181 fi
al@416 182
pascal@410 183 for i in /sys/block/*/dev /sys/block/*/*/dev ; do
pascal@411 184 [ -s "$i" ] || continue
pascal@410 185 n=${i%/dev}
pascal@410 186 n=/dev/${n##*/}
pascal@410 187 [ -e $n ] && continue
pascal@410 188 echo "Create $n "
pascal@410 189 mknod $n b $(sed 's/:/ /' < $i)
pascal@410 190 done
al@416 191
pascal@341 192 got modprobe && mod ${root//,/ }
al@416 193
pascal@384 194 [ -d /proc/sys/dev/cdrom ] &&
al@393 195 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
al@416 196
pascal@424 197 grep -q serial /proc/ioports &&
pascal@425 198 echo "ttyS0::respawn:/sbin/getty 115200,38400,9600,4800,2400 ttyS0" >> /etc/inittab
pascal@423 199
al@393 200 if use dmraid; then
al@393 201 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
pascal@314 202 [ ${root:0:4} = /dev ] ||
al@393 203 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
pascal@314 204 dmraid -ay
pascal@314 205 fi
pascal@399 206 use raiddev && raiddev="DEVICE ${root//,/ }"
pascal@399 207 use raidmail && raidmail="MAILADDR $root"
al@393 208 if use softraid; then
pascal@418 209 for i in 1 2 3 4 5 6 7 8 9; do
pascal@418 210 mdadm -E -s -c partitions > /etc/mdadm.conf
pascal@418 211 grep -qs " $root " /etc/mdadm.conf && break
pascal@418 212 sleep $i
pascal@418 213 done
pascal@399 214 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
pascal@399 215 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
al@393 216 grep level=raid /etc/mdadm.conf | ldraid
al@393 217 for i in 1 2 3 4 5 6 7 8 9; do
al@393 218 sleep $i
pascal@314 219 mdadm -A -s
pascal@419 220 grep -qs "^$(basename $root) : act" /proc/mdstat && break
pascal@314 221 done
pascal@419 222 grep -qs "^$(basename $root) : act" /proc/mdstat ||
pascal@418 223 root=$(awk '/^md/ { print "/dev/" $1; exit }' < /proc/mdstat)
pascal@323 224 lvm /etc/mdadm.conf
pascal@314 225 fi
pascal@323 226 lvm
al@416 227
al@393 228 if got mount; then
al@393 229 dev=$root
pascal@409 230 x=$(busybox blkid|grep $dev|sed 's/:.*//;q')
pascal@315 231 root=${x:-$dev}
pascal@314 232 [ "$dev" = "$root" ] || dev="$root ($dev)"
pascal@314 233 echo "Mount $dev..."
pascal@314 234 mnt /mnt
pascal@353 235 arg posixovl && echo "And posixovl..." &&
pascal@354 236 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
pascal@314 237 fi
al@416 238
pascal@314 239 got loopfs && echo "Into file $root..." &&
al@373 240 losetup /dev/loop0 /mnt/$root && busybox mount /dev/loop0 /mnt
pascal@317 241 got bindfs && echo "Bind ${root/,/ to }..." &&
al@373 242 busybox mount --bind /mnt/${root%,*} /mnt/${root/,//}
pascal@323 243 arg cryptoroot= && try
al@393 244 if use subroot; then
al@393 245 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
pascal@314 246 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
pascal@314 247 r=$root/run
pascal@314 248 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
pascal@323 249 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
pascal@314 250 fi
pascal@321 251 quit
pascal@314 252 msg tmpfs
pascal@314 253 root=100
pascal@314 254 got tmpram
pascal@314 255 r=$root
pascal@407 256 inodes=0
pascal@405 257 got rootfsinodes && inodes=$root
pascal@314 258 root=90%
pascal@314 259 got rootfssize
pascal@314 260 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
pascal@405 261 busybox mount -t tmpfs -o size=$root,nr_inodes=$inodes tmpfs /mnt &&
al@416 262 for i in $(ls -ar /); do
al@416 263 case "$i" in
al@416 264 .*|cdrom) ;;
al@416 265 mnt|proc|sys) mkdir /mnt/$i;;
al@416 266 usr|var|rootfs*) mv /$i /mnt;;
al@416 267 *) cp -a /$i /mnt 2>/dev/null && continue
al@416 268 fail
al@416 269 busybox umount /mnt
al@416 270 exit
al@416 271 esac
al@416 272 done || fail 3mSkipped
pascal@314 273 quit
pascal@323 274 mod squashfs 2>/dev/null || exit
pascal@314 275 msg aufs
pascal@314 276 br=/mnt/.rw
pascal@402 277 mkdir $br /mnt/.wd
pascal@314 278 got rwdev && mnt $br && br=$br$d
pascal@314 279 o=
pascal@314 280 p=
pascal@314 281 c=/mnt/.cdrom
al@393 282 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
al@393 283 root=/dev/cdrom/fs
pascal@314 284 got rodev
pascal@314 285 mkdir -p $c /mnt$c /mnt/.rw$c
pascal@314 286 mnt $c
pascal@314 287 o="-o 124"
pascal@314 288 p=/.cdrom/boot
pascal@318 289 c=$c$d
pascal@276 290 fi
pascal@314 291 l=0
pascal@314 292 r=
pascal@402 293 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
al@393 294 fs=${i#*root}
pascal@314 295 r=$r:/mnt/.$fs
pascal@314 296 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
pascal@314 297 losetup $o /dev/loop$l $i
al@373 298 busybox mount -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
pascal@276 299 done
pascal@402 300 while read type opt; do
pascal@402 301 mod $type && busybox mount -t $type -o $opt none /mnt && break
pascal@402 302 done <<EOT
pascal@402 303 aufs br=$br$r
pascal@402 304 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
pascal@402 305 EOT
pascal@314 306 quit