slitaz-boot-scripts annotate init @ rev 411

init: partitonless support
author Pascal Bellard <pascal.bellard@slitaz.org>
date Thu Aug 27 14:32:34 2015 +0200 (2015-08-27)
parents f9871e7a85b4
children 5f5c78d24bfd
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@341 43 ### Special mode used by loram flavor with aufs & 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
pascal@314 53 fail()
pascal@278 54 {
pascal@314 55 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
pascal@278 56 }
pascal@278 57
pascal@314 58 quit()
pascal@276 59 {
pascal@314 60 [ -d /mnt$4/etc ] || return
al@373 61 [ -n "$4" ] || busybox mount /mnt -o remount,ro
al@373 62 busybox mount --move /run /mnt/${1:-run}
pascal@314 63 cat>/run/init<<EOT
pascal@314 64 $2
pascal@314 65 x=/sbin/switch_root
pascal@314 66 [ -x \$x ] && exec \$x mnt $3 /sbin/init
pascal@276 67 EOT
pascal@314 68 fail 2mDone
pascal@314 69 exit
pascal@276 70 }
pascal@276 71
pascal@314 72 arg()
pascal@276 73 {
pascal@314 74 grep -q $1 /proc/cmdline
pascal@276 75 }
pascal@276 76
pascal@314 77 got()
pascal@276 78 {
pascal@314 79 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
pascal@276 80 }
pascal@276 81
pascal@314 82 msg()
pascal@276 83 {
pascal@317 84 echo "Switching / to $1..."
pascal@276 85 }
pascal@276 86
pascal@314 87 use()
pascal@276 88 {
pascal@315 89 got $1 && msg "$1 $root"
pascal@276 90 }
pascal@276 91
pascal@314 92 mnt()
pascal@276 93 {
pascal@411 94 r=$(busybox blkid 2> /dev/null | sed "s|\"||g;/${root//[^a-zA-Z0-9]/.}/!d;s|:.*||;q")
pascal@382 95 r=${r:-$root}
pascal@409 96 if [ ! -b $r ]; then
pascal@409 97 r=${r#/dev/}
pascal@409 98 r=/dev/${r%%/*}
pascal@409 99 fi
pascal@314 100 d=${root#*$r}
al@373 101 busybox mount $r $1 && return
pascal@314 102 w=$(cat /sys/module/usb_storage/parameters/delay_use)
pascal@314 103 w=$((1+${w:-2}))
pascal@314 104 echo -n "Sleep $w seconds..."
pascal@314 105 sleep $w
al@373 106 busybox mount $r $1
pascal@314 107 }
pascal@314 108
pascal@314 109 mod()
pascal@314 110 {
al@373 111 for i in $@; do
al@373 112 echo "Loading module: $i"
al@393 113 modprobe $i 2>/dev/null || busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
pascal@341 114 done
pascal@314 115 }
pascal@314 116
pascal@323 117 try()
pascal@314 118 {
al@373 119 if [ ! -d /mnt/etc ] && got cryptoroot; then
al@373 120 mod dm-mod dm-crypt aes-256
pascal@314 121 d=${root#/dev/}
pascal@314 122 l=crypto-$d
pascal@314 123 if cryptsetup isLuks $root 2>/dev/null; then
pascal@314 124 cryptsetup luksOpen $root $l
pascal@314 125 else
pascal@314 126 read -st 60 -p "Pass phrase : " p
pascal@314 127 k=$(echo $p|hashalot -x -n 32 sha512)
pascal@314 128 echo 0 $(cat $(find /sys/block|grep /$d/size))\
pascal@314 129 crypt aes-plain $k 0 $root 0|dmsetup create $l
pascal@314 130 fi
pascal@375 131 busybox mount /dev/mapper/$l /mnt
pascal@314 132 fi
pascal@314 133 got subroot && return
pascal@314 134 got loopfs && return
al@373 135 if [ -d /mnt/etc ]; then
al@373 136 for i in $@; do
al@373 137 cp -a $i /mnt$(dirname $i)
al@373 138 done
pascal@314 139 quit
pascal@314 140 fi
pascal@314 141 fail
pascal@314 142 }
pascal@314 143
pascal@323 144 lvm()
pascal@314 145 {
pascal@314 146 use lvmroot || return
pascal@314 147 mod dm-mod
pascal@314 148 vgscan --ignorelockingfailure
pascal@314 149 vgchange -ay --ignorelockingfailure
al@373 150 busybox mount /dev/mapper/$root /mnt
pascal@323 151 try /dev/mapper $1
pascal@314 152 }
pascal@314 153
pascal@314 154 ldraid()
pascal@314 155 {
al@393 156 while read l; do
al@393 157 case "$l" in
al@393 158 *raid10*) mod raid10;;
al@393 159 *raid0*) mod raid0;;
al@393 160 *raid1*) mod raid1;;
al@393 161 *raid*) mod raid456;;
al@393 162 *mirror*) mod dm-mirror;;
al@393 163 esac
pascal@276 164 done
pascal@276 165 }
pascal@276 166
al@373 167 if [ "$1" != "log" ]; then
al@373 168 busybox mount -t proc proc /proc
al@373 169 busybox mount -t sysfs sys /sys
al@373 170 busybox mount -t tmpfs tmpfs /run
pascal@314 171 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
pascal@314 172 $0 log 2>&1 | tee /run/boot.log
pascal@410 173 busybox umount /run
pascal@410 174 busybox umount /sys
al@373 175 busybox umount /proc
pascal@310 176 . /run/init
pascal@314 177 sh
pascal@314 178 fi
pascal@410 179 for i in /sys/block/*/dev /sys/block/*/*/dev ; do
pascal@411 180 [ -s "$i" ] || continue
pascal@410 181 n=${i%/dev}
pascal@410 182 n=/dev/${n##*/}
pascal@410 183 [ -e $n ] && continue
pascal@410 184 echo "Create $n "
pascal@410 185 mknod $n b $(sed 's/:/ /' < $i)
pascal@410 186 done
pascal@341 187 got modprobe && mod ${root//,/ }
pascal@384 188 [ -d /proc/sys/dev/cdrom ] &&
al@393 189 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
al@393 190 if use dmraid; then
al@393 191 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
pascal@314 192 [ ${root:0:4} = /dev ] ||
al@393 193 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
pascal@314 194 dmraid -ay
pascal@314 195 fi
pascal@399 196 use raiddev && raiddev="DEVICE ${root//,/ }"
pascal@399 197 use raidmail && raidmail="MAILADDR $root"
al@393 198 if use softraid; then
al@393 199 mdadm -E -s -c partitions > /etc/mdadm.conf
pascal@399 200 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
pascal@399 201 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
pascal@314 202 grep -qs " $root " /etc/mdadm.conf ||
al@393 203 root=$(awk '/dev.md/{print $2;exit}' < /etc/mdadm.conf)
al@393 204 grep level=raid /etc/mdadm.conf | ldraid
al@393 205 for i in 1 2 3 4 5 6 7 8 9; do
al@393 206 sleep $i
pascal@314 207 mdadm -A -s
pascal@314 208 grep -qs ': act' /proc/mdstat && break
pascal@314 209 done
pascal@323 210 lvm /etc/mdadm.conf
pascal@314 211 fi
pascal@323 212 lvm
al@393 213 if got mount; then
al@393 214 dev=$root
pascal@409 215 x=$(busybox blkid|grep $dev|sed 's/:.*//;q')
pascal@315 216 root=${x:-$dev}
pascal@314 217 [ "$dev" = "$root" ] || dev="$root ($dev)"
pascal@314 218 echo "Mount $dev..."
pascal@314 219 mnt /mnt
pascal@353 220 arg posixovl && echo "And posixovl..." &&
pascal@354 221 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
pascal@314 222 fi
pascal@314 223 got loopfs && echo "Into file $root..." &&
al@373 224 losetup /dev/loop0 /mnt/$root && busybox mount /dev/loop0 /mnt
pascal@317 225 got bindfs && echo "Bind ${root/,/ to }..." &&
al@373 226 busybox mount --bind /mnt/${root%,*} /mnt/${root/,//}
pascal@323 227 arg cryptoroot= && try
al@393 228 if use subroot; then
al@393 229 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
pascal@314 230 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
pascal@314 231 r=$root/run
pascal@314 232 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
pascal@323 233 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
pascal@314 234 fi
pascal@321 235 quit
pascal@314 236 msg tmpfs
pascal@314 237 root=100
pascal@314 238 got tmpram
pascal@314 239 r=$root
pascal@407 240 inodes=0
pascal@405 241 got rootfsinodes && inodes=$root
pascal@314 242 root=90%
pascal@314 243 got rootfssize
pascal@314 244 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
pascal@405 245 busybox mount -t tmpfs -o size=$root,nr_inodes=$inodes tmpfs /mnt &&
al@393 246 for i in $(ls -ar /); do
al@393 247 case "$i" in
pascal@317 248 .*|cdrom) ;;
pascal@314 249 mnt|proc|sys) mkdir /mnt/$i;;
pascal@314 250 usr|var|rootfs*) mv /$i /mnt;;
pascal@314 251 *) cp -a /$i /mnt 2>/dev/null && continue
pascal@314 252 fail
al@373 253 busybox umount /mnt
pascal@314 254 exit
pascal@276 255 esac
pascal@314 256 done || fail 3mSkipped
pascal@314 257 quit
pascal@323 258 mod squashfs 2>/dev/null || exit
pascal@314 259 msg aufs
pascal@314 260 br=/mnt/.rw
pascal@402 261 mkdir $br /mnt/.wd
pascal@314 262 got rwdev && mnt $br && br=$br$d
pascal@314 263 o=
pascal@314 264 p=
pascal@314 265 c=/mnt/.cdrom
al@393 266 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
al@393 267 root=/dev/cdrom/fs
pascal@314 268 got rodev
pascal@314 269 mkdir -p $c /mnt$c /mnt/.rw$c
pascal@314 270 mnt $c
pascal@314 271 o="-o 124"
pascal@314 272 p=/.cdrom/boot
pascal@318 273 c=$c$d
pascal@276 274 fi
pascal@314 275 l=0
pascal@314 276 r=
pascal@402 277 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
al@393 278 fs=${i#*root}
pascal@314 279 r=$r:/mnt/.$fs
pascal@314 280 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
pascal@314 281 losetup $o /dev/loop$l $i
al@373 282 busybox mount -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
pascal@276 283 done
pascal@402 284 while read type opt; do
pascal@402 285 mod $type && busybox mount -t $type -o $opt none /mnt && break
pascal@402 286 done <<EOT
pascal@402 287 aufs br=$br$r
pascal@402 288 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
pascal@402 289 EOT
pascal@314 290 quit