slitaz-boot-scripts annotate init @ rev 405

init: tuneable nr_inodes (thanks az_ua)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sat Aug 01 11:05:18 2015 +0200 (2015-08-01)
parents bf6a1b7f0dd0
children d6c818f35639
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@341 15 #
pascal@342 16 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
pascal@342 17 ### Any rootfs should fit, minimum required is slitaz-base.
pascal@341 18 #
pascal@341 19 # mount= [MOUNT]
pascal@341 20 # device with root loop file or sub directory
pascal@341 21 # posixovl [MOUNT]
pascal@341 22 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
pascal@341 23 # loopfs= [MOUNT]
pascal@341 24 # loop file for root filesystem
pascal@341 25 # subroot= [MOUNT]
pascal@341 26 # sub directory for root filesystem
paul@351 27 # bindfs= [MOUNT] (deprecated)
pascal@341 28 # bind out of root tree part
pascal@341 29 #
pascal@342 30 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
pascal@341 31 #
pascal@341 32 # dmraid= [RAID]
pascal@341 33 # root semi hardware raid device name in /dev/mapper
pascal@341 34 # softraid= [RAID]
pascal@341 35 # root software device name in /dev/mapper
pascal@341 36 # lvmroot= [LVM]
pascal@341 37 # root logical volume name in /dev/mapper
pascal@341 38 # cryptoroot= [CRYPTO]
pascal@341 39 # encrypted root device using luks or loop-aes
pascal@341 40 #
pascal@341 41 ### Special mode used by loram flavor with aufs & squashfs
pascal@342 42 ### incremental/nested rootfs (russian dolls).
pascal@341 43 #
pascal@341 44 # rodev= [LORAM][MERGE]
pascal@341 45 # device (+ optional path) for the read only aufs branch
pascal@341 46 # rwdev= [LORAM][MERGE]
paul@351 47 # (persistent) device for the r/w aufs branch instead of the ramfs
pascal@341 48 # isofs [LORAM]
pascal@341 49 # do not use squashfs filesystem images, but the cdrom filesystem only
pascal@341 50
pascal@314 51 fail()
pascal@278 52 {
pascal@314 53 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
pascal@278 54 }
pascal@278 55
pascal@314 56 quit()
pascal@276 57 {
pascal@314 58 [ -d /mnt$4/etc ] || return
al@373 59 [ -n "$4" ] || busybox mount /mnt -o remount,ro
al@373 60 busybox mount --move /run /mnt/${1:-run}
pascal@314 61 cat>/run/init<<EOT
pascal@314 62 $2
pascal@314 63 x=/sbin/switch_root
pascal@314 64 [ -x \$x ] && exec \$x mnt $3 /sbin/init
pascal@276 65 EOT
pascal@314 66 fail 2mDone
pascal@314 67 exit
pascal@276 68 }
pascal@276 69
pascal@314 70 arg()
pascal@276 71 {
pascal@314 72 grep -q $1 /proc/cmdline
pascal@276 73 }
pascal@276 74
pascal@314 75 got()
pascal@276 76 {
pascal@314 77 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
pascal@276 78 }
pascal@276 79
pascal@314 80 msg()
pascal@276 81 {
pascal@317 82 echo "Switching / to $1..."
pascal@276 83 }
pascal@276 84
pascal@314 85 use()
pascal@276 86 {
pascal@315 87 got $1 && msg "$1 $root"
pascal@276 88 }
pascal@276 89
pascal@314 90 mnt()
pascal@276 91 {
pascal@404 92 r=$(blkid 2> /dev/null | sed "s|\"||g;/$root/!d;s|:.*||;q")
pascal@382 93 r=${r:-$root}
pascal@343 94 r=${r#/dev/}
pascal@314 95 r=/dev/${r%%/*}
pascal@314 96 d=${root#*$r}
al@373 97 busybox mount $r $1 && return
pascal@314 98 w=$(cat /sys/module/usb_storage/parameters/delay_use)
pascal@314 99 w=$((1+${w:-2}))
pascal@314 100 echo -n "Sleep $w seconds..."
pascal@314 101 sleep $w
al@373 102 busybox mount $r $1
pascal@314 103 }
pascal@314 104
pascal@314 105 mod()
pascal@314 106 {
al@373 107 for i in $@; do
al@373 108 echo "Loading module: $i"
al@393 109 modprobe $i 2>/dev/null || busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
pascal@341 110 done
pascal@314 111 }
pascal@314 112
pascal@323 113 try()
pascal@314 114 {
al@373 115 if [ ! -d /mnt/etc ] && got cryptoroot; then
al@373 116 mod dm-mod dm-crypt aes-256
pascal@314 117 d=${root#/dev/}
pascal@314 118 l=crypto-$d
pascal@314 119 if cryptsetup isLuks $root 2>/dev/null; then
pascal@314 120 cryptsetup luksOpen $root $l
pascal@314 121 else
pascal@314 122 read -st 60 -p "Pass phrase : " p
pascal@314 123 k=$(echo $p|hashalot -x -n 32 sha512)
pascal@314 124 echo 0 $(cat $(find /sys/block|grep /$d/size))\
pascal@314 125 crypt aes-plain $k 0 $root 0|dmsetup create $l
pascal@314 126 fi
pascal@375 127 busybox mount /dev/mapper/$l /mnt
pascal@314 128 fi
pascal@314 129 got subroot && return
pascal@314 130 got loopfs && return
al@373 131 if [ -d /mnt/etc ]; then
al@373 132 for i in $@; do
al@373 133 cp -a $i /mnt$(dirname $i)
al@373 134 done
pascal@314 135 quit
pascal@314 136 fi
pascal@314 137 fail
pascal@314 138 }
pascal@314 139
pascal@323 140 lvm()
pascal@314 141 {
pascal@314 142 use lvmroot || return
pascal@314 143 mod dm-mod
pascal@314 144 vgscan --ignorelockingfailure
pascal@314 145 vgchange -ay --ignorelockingfailure
al@373 146 busybox mount /dev/mapper/$root /mnt
pascal@323 147 try /dev/mapper $1
pascal@314 148 }
pascal@314 149
pascal@314 150 ldraid()
pascal@314 151 {
al@393 152 while read l; do
al@393 153 case "$l" in
al@393 154 *raid10*) mod raid10;;
al@393 155 *raid0*) mod raid0;;
al@393 156 *raid1*) mod raid1;;
al@393 157 *raid*) mod raid456;;
al@393 158 *mirror*) mod dm-mirror;;
al@393 159 esac
pascal@276 160 done
pascal@276 161 }
pascal@276 162
al@373 163 if [ "$1" != "log" ]; then
al@373 164 busybox mount -t proc proc /proc
al@373 165 busybox mount -t sysfs sys /sys
al@373 166 busybox mount -t tmpfs tmpfs /run
pascal@314 167 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
pascal@314 168 $0 log 2>&1 | tee /run/boot.log
al@373 169 busybox umount /proc
al@373 170 busybox umount /sys
pascal@310 171 . /run/init
pascal@314 172 sh
pascal@314 173 fi
pascal@341 174 got modprobe && mod ${root//,/ }
pascal@384 175 [ -d /proc/sys/dev/cdrom ] &&
al@393 176 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
al@393 177 if use dmraid; then
al@393 178 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
pascal@314 179 [ ${root:0:4} = /dev ] ||
al@393 180 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
pascal@314 181 dmraid -ay
pascal@314 182 fi
pascal@399 183 use raiddev && raiddev="DEVICE ${root//,/ }"
pascal@399 184 use raidmail && raidmail="MAILADDR $root"
al@393 185 if use softraid; then
al@393 186 mdadm -E -s -c partitions > /etc/mdadm.conf
pascal@399 187 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
pascal@399 188 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
pascal@314 189 grep -qs " $root " /etc/mdadm.conf ||
al@393 190 root=$(awk '/dev.md/{print $2;exit}' < /etc/mdadm.conf)
al@393 191 grep level=raid /etc/mdadm.conf | ldraid
al@393 192 for i in 1 2 3 4 5 6 7 8 9; do
al@393 193 sleep $i
pascal@314 194 mdadm -A -s
pascal@314 195 grep -qs ': act' /proc/mdstat && break
pascal@314 196 done
pascal@323 197 lvm /etc/mdadm.conf
pascal@314 198 fi
pascal@323 199 lvm
al@393 200 if got mount; then
al@393 201 dev=$root
pascal@315 202 x=$(blkid|grep $dev|sed 's/:.*//;q')
pascal@315 203 root=${x:-$dev}
pascal@314 204 [ "$dev" = "$root" ] || dev="$root ($dev)"
pascal@314 205 echo "Mount $dev..."
pascal@314 206 mnt /mnt
pascal@353 207 arg posixovl && echo "And posixovl..." &&
pascal@354 208 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
pascal@314 209 fi
pascal@314 210 got loopfs && echo "Into file $root..." &&
al@373 211 losetup /dev/loop0 /mnt/$root && busybox mount /dev/loop0 /mnt
pascal@317 212 got bindfs && echo "Bind ${root/,/ to }..." &&
al@373 213 busybox mount --bind /mnt/${root%,*} /mnt/${root/,//}
pascal@323 214 arg cryptoroot= && try
al@393 215 if use subroot; then
al@393 216 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
pascal@314 217 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
pascal@314 218 r=$root/run
pascal@314 219 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
pascal@323 220 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
pascal@314 221 fi
pascal@321 222 quit
pascal@314 223 msg tmpfs
pascal@314 224 root=100
pascal@314 225 got tmpram
pascal@314 226 r=$root
pascal@405 227 inodes=90%
pascal@405 228 got rootfsinodes && inodes=$root
pascal@314 229 root=90%
pascal@314 230 got rootfssize
pascal@314 231 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
pascal@405 232 busybox mount -t tmpfs -o size=$root,nr_inodes=$inodes tmpfs /mnt &&
al@393 233 for i in $(ls -ar /); do
al@393 234 case "$i" in
pascal@317 235 .*|cdrom) ;;
pascal@314 236 mnt|proc|sys) mkdir /mnt/$i;;
pascal@314 237 usr|var|rootfs*) mv /$i /mnt;;
pascal@314 238 *) cp -a /$i /mnt 2>/dev/null && continue
pascal@314 239 fail
al@373 240 busybox umount /mnt
pascal@314 241 exit
pascal@276 242 esac
pascal@314 243 done || fail 3mSkipped
pascal@314 244 quit
pascal@323 245 mod squashfs 2>/dev/null || exit
pascal@314 246 msg aufs
pascal@314 247 br=/mnt/.rw
pascal@402 248 mkdir $br /mnt/.wd
pascal@314 249 got rwdev && mnt $br && br=$br$d
pascal@314 250 o=
pascal@314 251 p=
pascal@314 252 c=/mnt/.cdrom
al@393 253 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
al@393 254 root=/dev/cdrom/fs
pascal@314 255 got rodev
pascal@314 256 mkdir -p $c /mnt$c /mnt/.rw$c
pascal@314 257 mnt $c
pascal@314 258 o="-o 124"
pascal@314 259 p=/.cdrom/boot
pascal@318 260 c=$c$d
pascal@276 261 fi
pascal@314 262 l=0
pascal@314 263 r=
pascal@402 264 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
al@393 265 fs=${i#*root}
pascal@314 266 r=$r:/mnt/.$fs
pascal@314 267 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
pascal@314 268 losetup $o /dev/loop$l $i
al@373 269 busybox mount -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
pascal@276 270 done
pascal@402 271 while read type opt; do
pascal@402 272 mod $type && busybox mount -t $type -o $opt none /mnt && break
pascal@402 273 done <<EOT
pascal@402 274 aufs br=$br$r
pascal@402 275 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
pascal@402 276 EOT
pascal@314 277 quit