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zdump: Implement DFI interface for NGDump

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The NGDump DFI interface enables zgetdump to read and mount dumps created
with NGDump stand-alone dump.

Under the hood, the NGDump DFI delegates the task of reading and
parsing of ELF dump files to the ELF DFI interface dfi_elf.

Usage example 1:
----------------

$ zgetdump -i /dev/nvme0n1p1
General dump info:
  Dump format........: elf
  Version............: 1
  UTS node name......: t83lp49.lnxne.boe
  UTS kernel release.: 5.14.0-20210819.rc6.git0.efb8a921eec7.300.fc34.s390x
  UTS kernel version.: #1 SMP Thu Aug 19 00:22:04 CEST 2021
  System arch........: s390x (64 bit)
  CPU count (online).: 32
  Dump memory range..: 16384 MB

Memory map:
  0000000000000000 - 00000003ffffffff (16384 MB)

Usage example 2:
----------------

$ zgetdump /dev/nvme0n1p1 > dump.elf

Usage example 3:
----------------

$ zgetdump -m /dev/nvme0n1p1 /mnt
$ ls -l /mnt/dump.elf
$ zgetdump -u /mnt

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Tested-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Alexander Egorenkov
2021-08-05 13:39:36 +02:00
committed by Jan Höppner
parent 0466760ec1
commit 6c0f429805
4 changed files with 146 additions and 1 deletions
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zdump/Makefile
+1 -1
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@@ -54,7 +54,7 @@ OBJECTS = zgetdump.o opts.o zg.o zg_error.o zg_print.o \
dt.o dt_s390sv.o dt_s390sv_ext.o \
dt_s390mv.o dt_s390mv_ext.o \
dt_scsi.o output.o \
ngdump.o dt_ngdump.o
ngdump.o dt_ngdump.o dfi_ngdump.o
ifeq ("$(HAVE_FUSE)","0")
FUSE_CFLAGS = -DHAVE_FUSE=0 -D_FILE_OFFSET_BITS=64