a769152998
We are determining the Volume ID ourselves, and actually setting it in /etc/cmdline.d during image creation phase. Ensure we strip the root=live:CDLABEL cmdline entry added in the kiwi-generated grub2 configuration. During image build, having the entry in the cmdline is not an issue, as the volid is passed directly to xorriso by the main fix_bootconfig script. However, when repacking the image with some tools such as mksusecd, they might (correctly!) default to the specified label name in the grub configuration, which in our case is not what we want. Only s390x is affected as the other architectures's fix_bootconfig scripts replace the whole grub configuration. Signed-off-by: Eugenio Paolantonio <eugenio.paolantonio@suse.com>
182 lines
5.9 KiB
Bash
Executable file
182 lines
5.9 KiB
Bash
Executable file
#! /bin/bash
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# This script takes an unpacked s390x Live iso image in the form KIWI-NG currently creates.
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#
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# It modifies the tree to match s390x expectations.
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#
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# Usage:
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#
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# fix_bootconfig.s390x DST_DIR
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#
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# iso layout before:
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# .
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# ├── LiveOS
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# │ └── squashfs.img
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# └── boot
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# └── s390x
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# └── loader
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# ├── initrd
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# ├── isolinux.cfg
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# ├── isolinux.msg
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# └── linux
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#
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#
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# iso layout adjusted:
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# .
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# ├── LiveOS
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# │ └── squashfs.img
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# ├── boot
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# │ └── s390x
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# │ ├── cd.ikr
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# │ ├── initrd
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# │ ├── initrd.off
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# │ ├── initrd.siz
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# │ ├── linux
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# │ ├── parmfile
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# │ ├── parmfile.hmc
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# │ ├── sles.exec
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# │ └── suse.ins
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# ├── suse.ins
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# └── susehmc.ins
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#
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set -e
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dst="$1"
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if [ ! -d "$dst" ] ; then
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echo "fix_bootconfig.s390x: image dir \"$dst\" not found"
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exit 1
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fi
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# ----------------
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# Note:
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#
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# KIWI-NG creates an iso with isolinux boot files in boot/s390x/loader.
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#
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# These files are not needed except for kernel and initrd (and kernel params from isolinux.cfg).
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#
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# This script removes the isolinux config and adds s390x related config
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# files. It also moves kernel and initrd to the usual location (in boot/s390x).
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#
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boot_dir=$dst/boot/s390x
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grub_dir=$dst/boot/grub2
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# if files are in a 'loader' subdir, move them out
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if [ -d $boot_dir/loader ] ; then
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mv $boot_dir/loader/{initrd,linux} $boot_dir
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rm -r $boot_dir/loader
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fi
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# Create parmfile.
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#
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# These parameters are taken from a sampel isolinux.cfg; the required parameters will
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# possibly change according to the KIWI config.
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#
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parmfile_content=
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echo "$parmfile_content" >$boot_dir/parmfile
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# Note on parmfile:
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#
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# Possibly s390 expects parmfile to have a maximal line length of 80 chars - but you can have several lines.
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#
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# In contrast the parmfile blob embedded in cd.ikr should have no line breaks but can be longer than 80 chars.
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#
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# Create suse.ins & cd.ikr.
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#
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# cd.ikr is an image file combining kernel and initrd; suse.ins describes its layout.
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#
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# cd.ikr is used as boot image in El-torito style cd booting.
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#
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# Offsets used for cd.ikr.
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initrd_ofs_ofs=0x0001040c
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initrd_siz_ofs=0x00010414
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initrd_ofs=0x01000000
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parmfile_ofs=0x00010480
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# Create initrd.off (note: 32 bit, stored in big endian).
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printf "%08x" $((initrd_ofs)) | xxd -r -p - $boot_dir/initrd.off
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# Create initrd.siz (note: 32 bit, stored in big endian).
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read initrd_size x < <(du -b $boot_dir/initrd)
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printf "%08x" $((initrd_size)) | xxd -r -p - $boot_dir/initrd.siz
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# Create suse.ins.
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cat >$boot_dir/suse.ins <<XXX
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* SUSE Linux for IBM z Systems Installation System
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linux 0x00000000
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initrd.off $initrd_ofs_ofs
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initrd.siz $initrd_siz_ofs
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initrd $initrd_ofs
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parmfile $parmfile_ofs
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XXX
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# A suse.ins copy at media root dir - note the different paths.
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cat >$dst/suse.ins <<XXX
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* SUSE Linux for IBM z Systems Installation System
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boot/s390x/linux 0x00000000
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boot/s390x/initrd.off $initrd_ofs_ofs
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boot/s390x/initrd.siz $initrd_siz_ofs
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boot/s390x/initrd $initrd_ofs
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boot/s390x/parmfile $parmfile_ofs
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XXX
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# Another suse.ins copy at media root dir - note the different paths and the hmc stuff.
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cat >$dst/susehmc.ins <<XXX
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* SUSE Linux for IBM z Systems Installation System via HMC
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boot/s390x/linux 0x00000000
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boot/s390x/initrd.off $initrd_ofs_ofs
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boot/s390x/initrd.siz $initrd_siz_ofs
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boot/s390x/initrd $initrd_ofs
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boot/s390x/parmfile.hmc $parmfile_ofs
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XXX
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echo "$parmfile_content console=ttyS1" >$boot_dir/parmfile.hmc
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# Some rexx script to ipl something...
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cat >$boot_dir/sles.exec <<XXX
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/* REXX LOAD EXEC FOR SUSE LINUX S/390 VM GUESTS */
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/* LOADS SUSE LINUX S/390 FILES INTO READER */
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SAY ''
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SAY 'LOADING SLES FILES INTO READER...'
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'CP CLOSE RDR'
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'PURGE RDR ALL'
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'SPOOL PUNCH * RDR'
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'PUNCH SLES LINUX A (NOH'
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'PUNCH SLES PARMFILE A (NOH'
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'PUNCH SLES INITRD A (NOH'
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'IPL 00C'
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XXX
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# Strip CDLABEL from the kiwi-generated grub configuration
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# We are specifying the correct one in /etc/cmdline.d (see config.sh)
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# and having it here might be confusing to repackers such as
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# mksusecd (bsc#1245453)
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sed -i -E 's|root=live:CDLABEL=[^ ]+||g' $grub_dir/grub.cfg
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# Note:
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#
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# SUSE installer media also have boot/s390x/zpxe.rexx - a rexx script
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# that comes directly from the s390-tools package.
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#
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# Create cd.ikr with all the file blobs mentioned in suse.ins.
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dd status=none if=$boot_dir/linux of=$boot_dir/cd.ikr
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dd status=none conv=notrunc obs=1 seek=$((initrd_ofs_ofs)) if=$boot_dir/initrd.off of=$boot_dir/cd.ikr
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dd status=none conv=notrunc obs=1 seek=$((initrd_siz_ofs)) if=$boot_dir/initrd.siz of=$boot_dir/cd.ikr
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dd status=none conv=notrunc obs=4096 seek=$((initrd_ofs/4096)) if=$boot_dir/initrd of=$boot_dir/cd.ikr
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# clear kernel cmdline area; it's actually 4 kiB, but 1 block should be more than enough
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dd status=none conv=notrunc bs=1 count=512 seek=$((parmfile_ofs)) if=/dev/zero of=$boot_dir/cd.ikr
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echo -n "$parmfile_content" | dd status=none conv=notrunc obs=1 seek=$((parmfile_ofs)) of=$boot_dir/cd.ikr
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# S390 Magic?
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echo 80010000 | xxd -r -p -seek 4 - $boot_dir/cd.ikr
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# Pad cd.ikr to full 4k blocks.
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dd status=none conv=notrunc oflag=append bs=1 count=$((-initrd_size & 0xfff)) if=/dev/zero of=$boot_dir/cd.ikr
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# Add zipl map file for later use
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dd status=none if=/dev/zero of=$boot_dir/zipl.map bs=4k count=4
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