diff options
Diffstat (limited to 'meta-mellanox/meta-msn/recipes-phosphor/initfs/files/obmc-init.sh')
| -rw-r--r-- | meta-mellanox/meta-msn/recipes-phosphor/initfs/files/obmc-init.sh | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/meta-mellanox/meta-msn/recipes-phosphor/initfs/files/obmc-init.sh b/meta-mellanox/meta-msn/recipes-phosphor/initfs/files/obmc-init.sh new file mode 100644 index 000000000..55862aac3 --- /dev/null +++ b/meta-mellanox/meta-msn/recipes-phosphor/initfs/files/obmc-init.sh @@ -0,0 +1,430 @@ +#!/bin/sh + +fslist="proc sys dev run" +rodir=run/initramfs/ro +rwdir=run/initramfs/rw +upper=$rwdir/cow +work=$rwdir/work + +cd / +mkdir -p $fslist +mount dev dev -tdevtmpfs +mount sys sys -tsysfs +mount proc proc -tproc +if ! grep run proc/mounts +then + mount tmpfs run -t tmpfs -o mode=755,nodev +fi + +mkdir -p $rodir $rwdir + +cp -rp init failsafe recovery shutdown update update_all whitelist bin sbin usr lib etc var run/initramfs + +# To start a interactive shell with job control at this point, run +# getty 38400 ttyS4 + +findmtd() { + m=$(grep -xl "$1" /sys/class/mtd/*/name) + m=${m%/name} + m=${m##*/} + echo $m +} + +blkid_fs_type() { + # Emulate util-linux's `blkid -s TYPE -o value $1` + # Example busybox blkid output: + # # blkid /dev/mtdblock5 + # /dev/mtdblock5: TYPE="squashfs" + # Process output to extract TYPE value "squashfs". + blkid $1 | sed -e 's/^.*TYPE="//' -e 's/".*$//' +} + +probe_fs_type() { + fst=$(blkid_fs_type $1) + echo ${fst:=jffs2} +} + +# This fw_get_env_var is a possibly broken version of fw_printenv that +# does not check the crc or flag byte. +# The u-boot environemnt starts with a crc32, followed by a flag byte +# when a redundannt environment is configured, followed by var=value\0 sets. +# The flag byte for nand is a 1 byte counter; for nor it is a 1 or 0 byte. + +get_fw_env_var() { + # do we have 1 or 2 copies of the environment? + # count non-blank non-comment lines + # copies=$(grep -v ^# /etc/fw_env.config | grep -c [::alnum::]) + # ... we could if we had the fw_env.config in the initramfs + copies=2 + + # * Change \n to \r and \0 to \n + # * Skip to the 5th byte to skip over crc + # * then skip to the first or 2nd byte to skip over flag if it exists + # * stop parsing at first empty line corresponding to the + # double \0 at the end of the environment. + # * print the value of the variable name passed as argument + + envdev=$(findmtd u-boot-env) + if test -n $envdev + then + cat /dev/$envdev | + tr '\n\000' '\r\n' | + tail -c +5 | tail -c +${copies-1} | + sed -ne '/^$/,$d' -e "s/^$1=//p" + fi +} + +setup_resolv() { + runresolv=/run/systemd/resolve/resolv.conf + etcresolv=/etc/resolv.conf + + if test ! -e $etcresolv -a ! -L $etcresolv + then + mkdir -p ${runresolv%/*} + ln -s $runresolv $etcresolv + fi + if test ! -f $runresolv + then + cat /proc/net/pnp > $runresolv + fi + + return 0 +} + +try_tftp() { + # split into tftp:// host:port/ path/on/remote + # then spilt off / and then :port from the end of host:port/ + # and : from the beginning of port + + rest="${1#tftp://}" + path=${rest#*/} + host=${rest%$path} + host="${host%/}" + port="${host#${host%:*}}" + host="${host%$port}" + port="${port#:}" + + setup_resolv + + if test -z "$host" -o -z "$path" + then + debug_takeover "Invalid tftp download url '$url'." + elif echo "Downloading '$url' from $host ..." && + ! tftp -g -r "$path" -l /run/image-rofs "$host" ${port+"$port"} + then + debug_takeover "Download of '$url' failed." + fi +} + +try_wget() { + setup_resolv + + echo "Downloading '$1' ..." + if ! wget -O /run/image-rofs "$1" + then + debug_takeover "Download of '$url' failed." + fi +} + +debug_takeover() { + echo "$@" + test -n "$@" && echo Enter password to try to manually fix. + cat << HERE +After fixing run exit to continue this script, or reboot -f to retry, or +touch /takeover and exit to become PID 1 allowing editing of this script. +HERE + + while ! sulogin && ! test -f /takeover + do + echo getty failed, retrying + done + + # Touch /takeover in the above getty to become pid 1 + if test -e /takeover + then + cat << HERE + +Takeover of init requested. Executing /bin/sh as PID 1. +When finished exec new init or cleanup and run reboot -f. + +Warning: No job control! Shell exit will panic the system! +HERE + export PS1=init#\ + exec /bin/sh + fi +} + +env=$(findmtd u-boot-env) +if test -n $env +then + ln -s /dev/$env /run/mtd:u-boot-env + cp /run/mtd:u-boot-env /run/fw_env +fi + +rofs=$(findmtd rofs) +rwfs=$(findmtd rwfs) + +rodev=/dev/mtdblock${rofs#mtd} +rwdev=/dev/mtdblock${rwfs#mtd} + +# Set to y for yes, anything else for no. +force_rwfst_jffs2=y +flash_images_before_init=n +consider_download_files=y +consider_download_tftp=y +consider_download_http=y +consider_download_ftp=y + +rofst=squashfs +rwfst=$(probe_fs_type $rwdev) +roopts=ro +rwopts=rw + +image=/run/initramfs/image- +trigger=${image}rwfs + +init=/sbin/init +failsafe=/run/initramfs/failsafe +fsckbase=/sbin/fsck. +fsck=$fsckbase$rwfst +fsckopts=-a +optfile=/run/initramfs/init-options +optbase=/run/initramfs/init-options-base +urlfile=/run/initramfs/init-download-url +update=/run/initramfs/update + +if test -e /${optfile##*/} +then + cp /${optfile##*/} $optfile +fi + +if test -e /${optbase##*/} +then + cp /${optbase##*/} $optbase +else + touch $optbase +fi + +if test ! -f $optfile +then + cat /proc/cmdline $optbase > $optfile + get_fw_env_var openbmcinit >> $optfile + get_fw_env_var openbmconce >> $optfile +fi + +echo rofs = $rofs $rofst rwfs = $rwfs $rwfst + +if grep -w debug-init-sh $optfile +then + debug_takeover "Debug initial shell requested by command line." +fi + +if test "x$consider_download_files" = xy && + grep -w openbmc-init-download-files $optfile +then + if test -f ${urlfile##*/} + then + cp ${urlfile##*/} $urlfile + fi + if test ! -f $urlfile + then + get_fw_env_var openbmcinitdownloadurl > $urlfile + fi + url="$(cat $urlfile)" + rest="${url#*://}" + proto="${url%$rest}" + + if test -z "$url" + then + echo "Download url empty. Ignoring download request." + elif test -z "$proto" + then + echo "Download failed." + elif test "$proto" = tftp:// + then + if test "x$consider_download_tftp" = xy + then + try_tftp "$url" + else + echo "Download failed." + fi + elif test "$proto" = http:// + then + if test "x$consider_download_http" = xy + then + try_wget "$url" + else + echo "Download failed." + fi + elif test "$proto" = ftp:// + then + if test "x$consider_download_ftp" = xy + then + try_wget "$url" + else + echo "Download failed." + fi + else + echo "Download failed." + fi +fi + +# If there are images in root move them to /run/initramfs/ or /run/ now. +imagebasename=${image##*/} +if test -n "${imagebasename}" && ls /${imagebasename}* > /dev/null 2>&1 +then + if test "x$flash_images_before_init" = xy + then + echo "Flash images found, will update before starting init." + mv /${imagebasename}* ${image%$imagebasename} + else + echo "Flash images found, will use but deferring flash update." + mv /${imagebasename}* /run/ + fi +fi + +if grep -w clean-rwfs-filesystem $optfile +then + echo "Cleaning of read-write overlay filesystem requested." + touch $trigger +fi + +if test "x$force_rwfst_jffs2" = xy -a $rwfst != jffs2 -a ! -f $trigger +then + echo "Converting read-write overlay filesystem to jffs2 forced." + touch $trigger +fi + +if ls $image* > /dev/null 2>&1 +then + if ! test -x $update + then + debug_takeover "Flash update requested but $update missing!" + elif test -f $trigger -a ! -s $trigger + then + echo "Saving selected files from read-write overlay filesystem." + $update --no-restore-files + echo "Clearing read-write overlay filesystem." + flash_eraseall /dev/$rwfs + echo "Restoring saved files to read-write overlay filesystem." + touch $trigger + $update --no-save-files --clean-saved-files + else + $update --clean-saved-files + fi + + rwfst=$(probe_fs_type $rwdev) + fsck=$fsckbase$rwfst +fi + +if grep -w overlay-filesystem-in-ram $optfile +then + rwfst=none +fi + +copyfiles= +if grep -w copy-files-to-ram $optfile +then + rwfst=none + copyfiles=y +fi + +# It would be nice to do this after fsck but that mean rofs is mounted +# which triggers the mtd is mounted check +if test "$rwfst$copyfiles" = noney +then + touch $trigger + $update --copy-files --clean-saved-files --no-restore-files +fi + +if grep -w copy-base-filesystem-to-ram $optfile && + test ! -e /run/image-rofs && ! cp $rodev /run/image-rofs +then + # Remove any partial copy to avoid attempted usage later + if test -e /run/image-rofs + then + ls -l /run/image-rofs + rm -f /run/image-rofs + fi + debug_takeover "Copying $rodev to /run/image-rofs failed." +fi + +if test -s /run/image-rofs +then + rodev=/run/image-rofs + roopts=$roopts,loop +fi + +mount $rodev $rodir -t $rofst -o $roopts + +if test -x $rodir$fsck +then + for fs in $fslist + do + mount --bind $fs $rodir/$fs + done + chroot $rodir $fsck $fsckopts $rwdev + rc=$? + for fs in $fslist + do + umount $rodir/$fs + done + if test $rc -gt 1 + then + debug_takeover "fsck of read-write fs on $rwdev failed (rc=$rc)" + fi +elif test "$rwfst" != jffs2 -a "$rwfst" != none +then + echo "No '$fsck' in read only fs, skipping fsck." +fi + +if test "$rwfst" = none +then + echo "Running with read-write overlay in RAM for this boot." + echo "No state will be preserved unless flash update performed." +elif ! mount $rwdev $rwdir -t $rwfst -o $rwopts +then + msg="$(cat)" << HERE + +Mounting read-write $rwdev filesystem failed. Please fix and run + mount $rwdev $rwdir -t $rwfst -o $rwopts +to to continue, or do change nothing to run from RAM for this boot. +HERE + debug_takeover "$msg" +fi + +rm -rf $work +mkdir -p $upper $work + +mount -t overlay -o lowerdir=$rodir,upperdir=$upper,workdir=$work cow /root + +while ! chroot /root /bin/sh -c "test -x '$init' -a -s '$init'" +do + msg="$(cat)" << HERE + +Unable to confirm /sbin/init is an executable non-empty file +in merged file system mounted at /root. + +Change Root test failed! Invoking emergency shell. +HERE + debug_takeover "$msg" +done + +for f in $fslist +do + mount --move $f root/$f +done + +# switch_root /root $init +ln -s /root/dev/mem /dev/mem +FLASH_CP=`/root/sbin/devmem 0x1e785030` +FLASH_CP=$(($FLASH_CP&0x02)) +rm /dev/mem + +if [ $FLASH_CP == 0 ]; then +# echo "Flash 1 used. Normal boot."; + exec chroot /root $init; +else + exec chroot /root $failsafe; +fi + |
