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zipl: Add --no-compress option to zipl command

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Add --no-compress option to explicitly omit compression for single-volume
DASD dumper. Used primarily for test purposes.

Since only the lowest byte of mvdump_force field (struct
stage2dump_parm_tail) has been used, split it in two byte fields and use
one for the new no_compress attribute.

Update zipl help and zipl man page with the new parameter info.

Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Mikhail Zaslonko
2023-05-31 09:33:38 +02:00
committed by Jan Höppner
parent c08794bdfb
commit c61783546b
9 changed files with 31 additions and 8 deletions
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zipl/src/boot.c
+1 -1
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@@ -535,7 +535,7 @@ boot_get_eckd_dump_stage2(void **data, size_t *size,
if (buffer == NULL)
return -1;
memcpy(buffer, DATA_ADDR(eckd2dump_sv), DATA_SIZE(eckd2dump_sv));
/* Write mem size to end of dump record */
/* Write mem size and no-compression indicator to end of dump record */
offset = DATA_SIZE(eckd2dump_sv) - sizeof(struct stage2dump_parm_tail);
memcpy(VOID_ADD(buffer, offset), stage2dump_parms,
sizeof(struct stage2dump_parm_tail));