[Bug 2072366] Re: s390-tools zipl breaks when user provides target attributes

[Cody Shepherd]

I've tested this by running an oracular build on s390x with your ppa
package thrown in. The build succeeded, so it looks like the ppa package
is what we want.

Relevant portions from the build log:

```
After this operation, 747 MB of additional disk space will be used.
Get:1 http://ftpmaster.internal/ubuntu oracular/main s390x libfuse3-3 s390x 3.14.0-6 [81.9 kB]
Get:2 http://ppa.launchpad.net/fheimes/lp2072366/ubuntu oracular/main s390x s390-tools-data all 2.33.1-0ubuntu4 [18.9 kB]
Get:3 http://ppa.launchpad.net/fheimes/lp2072366/ubuntu oracular/main s390x s390-tools-signed all 2.33.1-0ubuntu4 [13.7 kB]
Get:4 http://ppa.launchpad.net/fheimes/lp2072366/ubuntu oracular/main s390x s390-tools s390x 2.33.1-0ubuntu4 [3206 kB]
...
+ chroot mountpoint /sbin/zipl -V --image=/boot/vmlinuz --parameters=root=LABEL=cloudimg-rootfs --target=/boot/ --targetbase=/dev/loop3 --targettype=SCSI --targetblocksize=512 --targetoffset=2048 --ramdisk=/boot/initrd.img
Looking for components in '/lib/s390-tools'
Secure boot support: no
Target device information
  Device..........................: 07:03
  Device name.....................: loop3 *)
  Device driver name..............: blkext
  Type............................: disk device
  Disk layout.....................: SCSI disk layout *)
  Geometry - start................: 2048 *)
  File system block size..........: 4096
  Physical block size.............: 512 *)
  Device size in physical blocks..: 4608000
  *) Data provided by user.
Building bootmap in '/boot/'
Adding IPL section
  initial ramdisk...: /boot/initrd.img
  kernel image......: /boot/vmlinuz
  kernel parmline...: 'root=LABEL=cloudimg-rootfs'
  component address:
    heap area.......: 0x00002000-0x00005fff
    stack area......: 0x0000f000-0x0000ffff
    internal loader.: 0x0000a000-0x0000dfff
    parameters......: 0x00009000-0x000091ff
    kernel image....: 0x00010000-0x009b1fff
    parmline........: 0x009b3000-0x009b31ff
    initial ramdisk.: 0x009d0000-0x01fde7ff
    environment blk.: 0x009c3000-0x009c3fff
zIPL environment block content:
Preparing boot device for LD-IPL: loop3.
Detected SCSI PCBIOS disk layout.
Writing SCSI master boot record.
Syncing disks...
Done.
```

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https://bugs.launchpad.net/bugs/2072366

Title:
  s390-tools zipl breaks when user provides target attributes

Status in Ubuntu on IBM z Systems:
  In Progress
Status in s390-tools package in Ubuntu:
  In Progress
Status in s390-tools-signed package in Ubuntu:
  In Progress

Bug description:
  This issue has already been identified and fixed in the (upstream?)
  github repository:
  https://github.com/ibm-s390-linux/s390-tools/commit/63ff07ba38dda99e2661a097d05266555c727a2e

  The issue fixed by the revert linked above is causing Cloudware
  Oracular download image builds to fail on s390x. From the image build
  log:

  ```
  + ZIPL_EXTRA_PARAMS=--ramdisk=/boot/initrd.img
  + chroot mountpoint /sbin/zipl -V --image=/boot/vmlinuz --parameters=root=LABEL=cloudimg-rootfs --target=/boot/ --targetbase=/dev/loop3 --targettype=SCSI --targetblocksize=512 --targetoffset=2048 --ramdisk=/boot/initrd.img
  Error: Could not add image file '/boot/vmlinuz': Could not get disk geometry
  Looking for components in '/lib/s390-tools'
  Secure boot support: no
  Target device information
    Device..........................: 07:03
    Device name.....................: loop3 *)
    Device driver name..............: blkext
    Type............................: disk device
    Disk layout.....................: SCSI disk layout *)
    Geometry - start................: 2048 *)
    File system block size..........: 4096
    Physical block size.............: 512 *)
    Device size in physical blocks..: 4608000
    *) Data provided by user.
  Building bootmap in '/boot/'
  Adding IPL section
    initial ramdisk...: /boot/initrd.img
    kernel image......: /boot/vmlinuz
  zIPL environment block content:
  ```

  The fix is in the github repo but not yet released. The LP builders
  for Oracular are using version 2.33.1, which contains the bug.

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