mirror of
https://github.com/ibm-s390-linux/s390-tools.git
synced 2026-08-05 02:14:52 +00:00
Mikhail Zaslonko
aade05b01d
Update df_s390_dumper structure and dumper reading functions to read certain dumper fields instead of the entire dump tool. Update other s390 dump common functions in preparation for the new dumper and the new s390 extended dump format. Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
/*
|
|
* zgetdump - Tool for copying and converting System z dumps
|
|
*
|
|
* S390 single-volume DASD dump tool
|
|
*
|
|
* Copyright IBM Corp. 2001, 2018
|
|
*
|
|
* s390-tools is free software; you can redistribute it and/or modify
|
|
* it under the terms of the MIT license. See LICENSE for details.
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include "zgetdump.h"
|
|
|
|
/*
|
|
* File local static data
|
|
*/
|
|
static struct {
|
|
struct df_s390_dumper dumper;
|
|
enum dfi_arch dumper_arch;
|
|
} l;
|
|
|
|
/*
|
|
* Read dump tool from ECKD DASD device
|
|
*/
|
|
static int dumper_read_eckd(int blk_size)
|
|
{
|
|
df_s390_dumper_read(g.fh, blk_size, &l.dumper);
|
|
|
|
if (strncmp(l.dumper.magic, DF_S390_DUMPER_MAGIC64, 7) == 0) {
|
|
l.dumper_arch = DFI_ARCH_64;
|
|
} else if (strncmp(l.dumper.magic, DF_S390_DUMPER_MAGIC32, 7) == 0) {
|
|
l.dumper_arch = DFI_ARCH_32;
|
|
} else if (memcmp(l.dumper.magic, OLD_DUMPER_HEX_INSTR1, 4) == 0 &&
|
|
l.dumper.version == 0) {
|
|
/* We found the old dumper */
|
|
l.dumper_arch = DFI_ARCH_UNKNOWN;
|
|
} else {
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check FBA dump tool magic number and set architecture attribute
|
|
*/
|
|
static int dumper_check_fba(struct df_s390_dumper *dumper)
|
|
{
|
|
if (strncmp(dumper->magic, DF_S390_DUMPER_MAGIC64_FBA, 7) == 0) {
|
|
l.dumper_arch = DFI_ARCH_64;
|
|
} else if (strncmp(dumper->magic, DF_S390_DUMPER_MAGIC32_FBA, 7) == 0) {
|
|
l.dumper_arch = DFI_ARCH_32;
|
|
} else if (memcmp(dumper->magic, OLD_DUMPER_HEX_INSTR1, 4) == 0 &&
|
|
memcmp(&dumper->size, OLD_DUMPER_HEX_INSTR2, 2) == 0) {
|
|
/* We found basr r13,0 (old dumper) */
|
|
dumper->version = 0;
|
|
l.dumper_arch = DFI_ARCH_UNKNOWN;
|
|
} else {
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read dump tool from FBA device
|
|
*/
|
|
static int dumper_read_validate_fba(int size, struct df_s390_dumper *dumper)
|
|
{
|
|
int bytes_to_read;
|
|
|
|
/*
|
|
* On FBA device the dumper is written at the end of the volume because
|
|
* there is not enough space to place it at the beginning due to the
|
|
* linux disk layout
|
|
*/
|
|
zg_seek_end(g.fh, -size, ZG_CHECK);
|
|
bytes_to_read = offsetof(struct df_s390_dumper, force);
|
|
zg_read(g.fh, dumper, bytes_to_read, ZG_CHECK);
|
|
if (dumper_check_fba(dumper) != 0)
|
|
return -ENODEV;
|
|
dumper->size = size;
|
|
bytes_to_read = sizeof(dumper->force) + sizeof(dumper->mem);
|
|
zg_seek_end(g.fh, -bytes_to_read, ZG_CHECK);
|
|
zg_read(g.fh, &dumper->force, bytes_to_read, ZG_CHECK);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read dump tool on FBA disk and check its magic number
|
|
*/
|
|
static int dumper_read_fba(void)
|
|
{
|
|
if (dumper_read_validate_fba(DF_S390_DUMPER_SIZE_V3, &l.dumper) == 0)
|
|
return 0;
|
|
if (dumper_read_validate_fba(DF_S390_DUMPER_SIZE_V2, &l.dumper) == 0)
|
|
return 0;
|
|
if (dumper_read_validate_fba(DF_S390_DUMPER_SIZE_V1, &l.dumper) == 0)
|
|
return 0;
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Read single volume dumper from disk
|
|
*/
|
|
static int sv_dumper_read(void)
|
|
{
|
|
int blk_size;
|
|
|
|
if (zg_type(g.fh) == ZG_TYPE_DASD_PART)
|
|
return -ENODEV;
|
|
zg_ioctl(g.fh, BLKSSZGET, &blk_size, "BLKSSZGET", ZG_CHECK);
|
|
if (dumper_read_eckd(blk_size) == 0) {
|
|
dt_attr_dasd_type_set("ECKD");
|
|
return 0;
|
|
}
|
|
if (dumper_read_fba() == 0) {
|
|
dt_attr_dasd_type_set("FBA");
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Initialize s390 single-volume dump tool (for -d option)
|
|
*/
|
|
static int dt_s390sv_init(void)
|
|
{
|
|
if (sv_dumper_read() != 0)
|
|
return -ENODEV;
|
|
dt_arch_set(l.dumper_arch);
|
|
dt_version_set(l.dumper.version);
|
|
dt_attr_mem_limit_set(l.dumper.mem);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* s390 single-volume DT operations
|
|
*/
|
|
struct dt dt_s390sv = {
|
|
.desc = "Single-volume DASD dump tool",
|
|
.init = dt_s390sv_init,
|
|
};
|