Since DASD standalone dumper does not support non-extended s390
multi-volume dumps for years, drop zgetdump support of non-extended s390_mv
DASD dumps and dump-tools:
- Merge dfi_s390mv_ext and dt_s390mv_ext with related dfi_s390mv and
dt_s390mv counterparts.
- Update DFI and DT vectors of supported dump formats and dump-tools
removing dfi_s390mv and dt_s390mv entries and keeping dt_s390mv_ext and
dfi_s390mv_ext ones for s390_mv extended dump and dump-tool accordingly.
- Remove dfi_s390mv.c and dt_s390mv.c sources and update the Makefile.
- Make dfi_s390mv_ext_init() and dfi_s390mv_info() static.
- Remove magic number relevant to non-extended s390_mv DASD dumper.
- Completely drop DASD dumper version 5 case in df_s390_dumper_read().
Note: Since non-extended s390 multi-volume dumps can reside on DASD
partitions only and cannot be produced via DFO interface, we can drop this
dump format entirely.
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>
Since DASD standalone dumper does not support non-extended s390 dump
format for years, drop zgetdump support of non-extended s390 single volume
DASD dump-tool:
- Merge dt_390sv_ext.c and dt_s390sv.c counterparts.
- Update DT vector of supported dump tools removing dt_s390sv entry and
keeping dt_s390sv_ext entry for s390 single volume extended dump tool.
- Remove dt_s390sv.c source and update the Makefile accordingly.
- Remove magic constants relevant to non-extended s390 single volume DASD
dumper.
- Drop s390 single volume DASD dumper version 5 in df_s390_dumper_read().
Note: We still need support of non-extended s390 dump format since such
output dump files can be produced by 'zgetdump -f s390' via dfo_s390. Thus,
both dfi_s390 and dfi_s390_ext DFI vector entries remain in order to
process s390 dumps files as well as s390_ext dumps on the DASD partition.
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>
Drop support of obsolete dump and dump-tool versions (single-volume DASD,
FBA and Tape) in order to simplify zgetdump logic:
- CCW dumpers written in assembler instructions as well as stage2 dumpers
of size less than 0x3000 (STAGE2_DUMPER_SIZE_V1 or STAGE2_DUMPER_SIZE_V2)
haven't been used for years. Remove its traces completely as a cleanup.
Keep the last version (version 5) of non-extended DASD dumper as well as
newer extended DASD dumpers.
- Rename STAGE2_DUMPER_SIZE_V3 and STAGE2_DUMPER_SIZE_ZLIB constants.
- Drop support of non-extended s390 dumps of version < 5. Dump files
of s390 format version 5 can be still produced by zgetdump (dfo_s390).
- Drop excessive dump version checking in df_s390_cpu_info_add() and
df_s390_hdr_add() considering that obsolete s390 dumps of version lower
than 5 no longer supported.
- Use cpu_cnt field in s390 dump header instead of the s390 dump version to
indicate no cpu info available (DFI_CPU_CONTENT_NONE) for dfo_s390.
- Make df_s390_dumper_read() return error code upon unknown dumper
version/magic detection.
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>
Add DF_S390_DUMPER_MAGIC_SIZE constant to s390_dump.h.
Use it instead of hardcoded length when processing dumper magics
in zgetdump code.
Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Acked-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Move DUMPER_MAGIC constants from df_s390.h to the global header
include/dump/s390_dump.h in order to reuse it in zipl code.
Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
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>
Move struct stage2dump_parm_tail from stage2dump.h in to
include/dump/s390_dump.h
Pass the entire stage2dump_parm_tail structure to install_dump_* functions
instead of individual parameters.
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>
Integrate zlib DFLTCC deflate compression to single volume dasd dumper
using the existing s390 extended dump format. Compression takes place
only if DFLTCC facility is available, otherwise dump is written
uncompressed as before.
First megabyte of memory is always written uncompressed and afterwards
this area is used for zlib workspace and for the compression output buffer.
The compression takes place in chunks of data of equal size (currently 1MB)
and the offset of each compressed chunk is stored in the dump segment
header. Since existing dump segment headers of 1 page size are used, we
need to limit the maximum size of compressed dump segments.
Chunk is written uncompressed in case of compression error or if
deflate compression only makes it bigger.
Thus every chunk of data is compressed separately and can be decompressed
independently. The main reason for that is to enable zgetdump to make fast
read seeks. Otherwise, zgetdump would need to decompress a big dump segment
in the worst case to extract a single piece of data.
Put compression related functions and structures to eckd2dump_zlib.c
and eckd2dump_zlib.h
Update zipl man page with the general information of zlib compression
support.
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>
Instead of using its own DF_S390_ constants and df_s390_ structs
in df_s390.h, include those from "dump/s390_dump.h" in order to minimize
duplicates. Adjust the code, where required, to use <stdint> types
instead of those defined in zt_common.h (e.g. use uint64_t instead of u64).
Adjust zdump include statements.
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>
Move common dump related structures and constants to the global header
"dump/s390_dump.h" in order to get rid of many duplicates in zgetdump code.
Adjust zipl include statements and update Copyright statements.
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>
