mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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f821a3c174
- Initialize dump and dump-tool architecture to DFI_ARCH_64 at the start of dfi_init() and dt_init() respectively. - Bail out if any dump architecture other than ARCH_64 has been detected in s390_ext or s390mv_ext DASD dump header. - Remove redundant dfi_arch_set() and dt_arch_set() functions. - Get rid of l.arch local variables in dfi* and dt* source files and drop dfi_arch() function. - Drop the usage of DFI_ARCH_32 and compeletely remove DFI_ARCH_UNKNOWN. - Drop special register and lowcore processing functions used for DFI_ARCH_32. - Drop df_s390_from_dfi_arch() and df_s390_to_dfi_arch() funcitons. - Update the man file for zgetdump. 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>
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/*
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* zgetdump - Tool for copying and converting System z dumps
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*
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* S390 single-volume DASD dump tool (extended)
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*
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* Copyright IBM Corp. 2001, 2025
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <linux/fs.h>
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#include "zgetdump.h"
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#include "zg.h"
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#include "dt.h"
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#include "df_s390.h"
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/*
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* File local static data
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*/
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static struct {
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struct df_s390_dumper dumper;
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} l;
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/*
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* Read dump tool from ECKD DASD device
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*/
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static int dumper_read_eckd(int blk_size)
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{
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if (df_s390_dumper_read(g.fh, blk_size, &l.dumper))
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return -ENODEV;
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if (strncmp(l.dumper.magic, DF_S390_DUMPER_MAGIC_EXT,
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DF_S390_DUMPER_MAGIC_SIZE) != 0)
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return -ENODEV;
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return 0;
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}
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/*
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* Read dump tool on FBA disk and check its magic number
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*/
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static int dumper_read_fba(void)
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{
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struct df_s390_dumper *dumper = &l.dumper;
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int bytes_to_read;
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/*
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* On FBA device the dumper is written at the end of the volume because
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* there is not enough space to place it at the beginning due to the
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* linux disk layout.
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* First read 2 fields at the start of the dumper. The magic number
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* and the version.
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*/
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zg_seek_end(g.fh, -STAGE2_DUMPER_SIZE_SV, ZG_CHECK);
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bytes_to_read = offsetof(struct df_s390_dumper, size);
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zg_read(g.fh, dumper, bytes_to_read, ZG_CHECK);
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if (strncmp(dumper->magic, DF_S390_DUMPER_MAGIC_FBA_EXT,
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DF_S390_DUMPER_MAGIC_SIZE) != 0)
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return -ENODEV;
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dumper->size = STAGE2_DUMPER_SIZE_SV;
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/* Read force and mem fields in the end of the dumper */
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bytes_to_read = sizeof(dumper->force) + sizeof(dumper->mem);
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zg_seek_end(g.fh, -bytes_to_read, ZG_CHECK);
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zg_read(g.fh, &dumper->force, bytes_to_read, ZG_CHECK);
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return 0;
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}
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/*
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* Read single volume dumper from disk
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*/
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static int sv_dumper_read(void)
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{
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int blk_size;
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if (zg_type(g.fh) == ZG_TYPE_DASD_PART)
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return -ENODEV;
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zg_ioctl(g.fh, BLKSSZGET, &blk_size, "BLKSSZGET", ZG_CHECK);
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if (dumper_read_eckd(blk_size) == 0) {
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dt_attr_dasd_type_set("ECKD");
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return 0;
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}
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if (dumper_read_fba() == 0) {
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dt_attr_dasd_type_set("FBA");
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return 0;
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}
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return -ENODEV;
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}
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/*
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* Initialize s390 single-volume extended dump tool (for -d option)
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*/
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static int dt_s390sv_ext_init(void)
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{
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if (sv_dumper_read() != 0)
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return -ENODEV;
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dt_version_set(l.dumper.version);
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dt_attr_mem_limit_set(l.dumper.mem);
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return 0;
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}
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/*
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* s390 single-volume DT (extended) operations
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*/
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struct dt dt_s390sv_ext = {
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.desc = "Single-volume DASD dump tool (extended)",
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.init = dt_s390sv_ext_init,
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};
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