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zipl: Implement zipl helper script for NGDump

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The purpose of the new zipl helper script is to build a dumper initramfs
for NGDump stand-alone dump. zipl executes the helper script when
preparing a NVMe dump partition for stand-alone dump.

The zipl helper script expects a single parameter - a path to the dump
partition to store a dump on. The helper script terminates with 0 on
success and a positive value otherwise.

The zipl helper script performs the following steps:
- It builds an initramfs image suitable for dumping. To perform this step,
  the script employs the dracut tool on Fedora/RHEL/SLES and
  the initramfs-tools on Ubuntu/Debian.
- It outputs the path to the newly built initramfs image and the currently
  active kernel bzImage on the standard output.
- It prints the kernel command-line to be used by the dumper on
  the standard output.

On success, zipl expects the helper script to return at least three lines
containing:
- initrd=<path to an initramfs image>
- kernel=<path to a kernel bzImage>
- cmdline=<kernel command-line parameters>

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Tested-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Alexander Egorenkov
2021-08-12 13:23:46 +02:00
committed by Jan Höppner
parent c1d08e1380
commit b4142a9966
6 changed files with 257 additions and 0 deletions
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zipl/include/job.h
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@@ -135,5 +135,6 @@ int job_get(int argc, char* argv[], struct job_data** data);
void job_free(struct job_data* job);
int type_from_target(char *target, disk_type_t *type);
int check_job_dump_images(struct job_dump_data* dump, char* name);
int check_job_images_ngdump(struct job_dump_data* dump, char* name);
#endif /* not JOB_H */