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sadump_info.c
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sadump_info.c
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/*
* sadump_info.c
*
* Created by: HATAYAMA, Daisuke <[email protected]>
*
* Copyright (C) 2011 FUJITSU LIMITED
* Copyright (C) 2011 NEC Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#if defined(__x86__) || defined(__x86_64__)
#include "makedumpfile.h"
#include "elf_info.h"
#include "print_info.h"
#include "sadump_mod.h"
#include <arpa/inet.h> /* htonl, htons */
#define SADUMP_EFI_GUID_TEXT_REPR_LEN 36
#ifdef __x86__
#define KEXEC_NOTE_HEAD_BYTES roundup(sizeof(Elf32_Nhdr), 4)
#endif
#ifdef __x86_64__
#define MEGABYTES(x) ((x) * (1048576))
#define KEXEC_NOTE_HEAD_BYTES roundup(sizeof(Elf64_Nhdr), 4)
#endif
#define KEXEC_CORE_NOTE_DESC_BYTES roundup(sizeof(struct elf_prstatus), 4)
#define KEXEC_NOTE_BYTES ((KEXEC_NOTE_HEAD_BYTES * 2) + \
roundup(KEXEC_CORE_NOTE_NAME_BYTES, 4) + \
KEXEC_CORE_NOTE_DESC_BYTES )
#define for_each_online_cpu(cpu) \
for (cpu = 0; cpu < max_mask_cpu(); ++cpu) \
if (is_online_cpu(cpu))
enum {
BITPERWORD = BITPERBYTE * sizeof(unsigned long)
};
struct sadump_diskset_info {
char *name_memory;
int fd_memory;
struct sadump_part_header *sph_memory;
unsigned long data_offset;
};
struct sadump_info {
struct sadump_part_header *sph_memory;
struct sadump_header *sh_memory;
struct sadump_disk_set_header *sdh_memory;
struct sadump_media_header *smh_memory;
struct sadump_diskset_info *diskset_info;
int num_disks;
unsigned long sub_hdr_offset;
uint32_t smram_cpu_state_size;
unsigned long data_offset;
unsigned long long *block_table;
unsigned long *__per_cpu_offset;
unsigned long __per_cpu_load;
FILE *file_elf_note;
char *cpu_online_mask_buf;
size_t cpumask_size;
/* Backup Region, First 640K of System RAM. */
#define KEXEC_BACKUP_SRC_END 0x0009ffff
unsigned long long backup_src_start;
unsigned long backup_src_size;
unsigned long long backup_offset;
int kdump_backed_up;
mdf_pfn_t max_mapnr;
struct dump_bitmap *ram_bitmap;
};
static char *guid_to_str(efi_guid_t *guid, char *buf, size_t buflen);
static struct tm *efi_time_t_to_tm(const efi_time_t *e);
static int verify_magic_number(uint32_t magicnum[DUMP_PART_HEADER_MAGICNUM_SIZE]);
static int read_device(void *buf, size_t bytes, ulong *offset);
static int read_device_diskset(struct sadump_diskset_info *sdi, void *buf,
size_t bytes, ulong *offset);
static int read_sadump_header(char *filename);
static int read_sadump_header_diskset(int diskid, struct sadump_diskset_info *sdi);
static unsigned long long pfn_to_block(mdf_pfn_t pfn);
static int lookup_diskset(unsigned long long whole_offset, int *diskid,
unsigned long long *disk_offset);
static int max_mask_cpu(void);
static int cpu_online_mask_init(void);
static int per_cpu_init(void);
static int get_data_from_elf_note_desc(const char *note_buf, uint32_t n_descsz,
char *name, uint32_t n_type, char **data);
static int alignfile(unsigned long *offset);
static int
write_elf_note_header(char *name, void *data, size_t descsz, uint32_t type,
unsigned long *offset, unsigned long *desc_offset);
static int is_online_cpu(int cpu);
static unsigned long legacy_per_cpu_ptr(unsigned long ptr, int cpu);
static unsigned long per_cpu_ptr(unsigned long ptr, int cpu);
static int get_prstatus_from_crash_notes(int cpu, char *prstatus_buf);
static int cpu_to_apicid(int cpu, int *apicid);
static int get_smram_cpu_state(int apicid, struct sadump_smram_cpu_state *smram);
static int copy_regs_from_prstatus(struct elf_prstatus *prstatus,
const char *prstatus_buf);
static int
copy_regs_from_smram_cpu_state(struct elf_prstatus *prstatus,
const struct sadump_smram_cpu_state *smram);
static void
debug_message_smram_cpu_state(int apicid, struct sadump_smram_cpu_state *s);
static void
debug_message_user_regs_struct(int cpu, struct elf_prstatus *prstatus);
static int get_registers(int cpu, struct elf_prstatus *prstatus);
static struct sadump_info sadump_info = {};
static struct sadump_info *si = &sadump_info;
static inline int
sadump_is_on(char *bitmap, mdf_pfn_t i)
{
return bitmap[i >> 3] & (1 << (7 - (i & 7)));
}
static inline int
sadump_is_dumpable(struct dump_bitmap *bitmap, mdf_pfn_t pfn)
{
off_t offset;
if (pfn == 0 || bitmap->no_block != pfn/PFN_BUFBITMAP) {
offset = bitmap->offset + BUFSIZE_BITMAP*(pfn/PFN_BUFBITMAP);
lseek(bitmap->fd, offset, SEEK_SET);
read(bitmap->fd, bitmap->buf, BUFSIZE_BITMAP);
if (pfn == 0)
bitmap->no_block = 0;
else
bitmap->no_block = pfn / PFN_BUFBITMAP;
}
return sadump_is_on(bitmap->buf, pfn % PFN_BUFBITMAP);
}
static inline int
sadump_is_ram(mdf_pfn_t pfn)
{
return sadump_is_dumpable(si->ram_bitmap, pfn);
}
int
check_and_get_sadump_header_info(char *filename)
{
int i;
if (!read_sadump_header(filename))
return FALSE;
if (info->flag_sadump_diskset && info->flag_sadump == SADUMP_DISKSET) {
si->diskset_info[0].fd_memory = info->fd_memory;
si->diskset_info[0].sph_memory = si->sph_memory;
si->diskset_info[0].data_offset = si->data_offset;
for (i = 1; i < si->num_disks; ++i) {
struct sadump_diskset_info *sdi =
&si->diskset_info[i];
if ((sdi->fd_memory =
open(sdi->name_memory, O_RDONLY)) < 0) {
ERRMSG("Can't open the dump diskset "
"memory(%s). %s\n", sdi->name_memory,
strerror(errno));
return FALSE;
}
if (!read_sadump_header_diskset(i, sdi))
return FALSE;
}
}
return TRUE;
}
static void
reverse_bit(char *buf, int len)
{
int i;
unsigned char c;
for (i = 0; i < len; i++) {
c = buf[i];
c = ((c & 0x55) << 1) | ((c & 0xaa) >> 1); /* Swap 1bit */
c = ((c & 0x33) << 2) | ((c & 0xcc) >> 2); /* Swap 2bit */
c = (c << 4) | (c >> 4); /* Swap 4bit */
buf[i] = c;
}
}
int
sadump_copy_1st_bitmap_from_memory(void)
{
struct sadump_header *sh = si->sh_memory;
char buf[si->sh_memory->block_size];
off_t offset_page;
unsigned long bitmap_offset, bitmap_len;
bitmap_offset = si->sub_hdr_offset + sh->block_size*sh->sub_hdr_size;
bitmap_len = sh->block_size * sh->bitmap_blocks;
if (lseek(info->fd_memory, bitmap_offset, SEEK_SET) < 0) {
ERRMSG("Can't seek %s. %s\n",
info->name_memory, strerror(errno));
return FALSE;
}
if (lseek(info->bitmap1->fd, info->bitmap1->offset, SEEK_SET) < 0) {
ERRMSG("Can't seek the bitmap(%s). %s\n",
info->bitmap1->file_name, strerror(errno));
return FALSE;
}
offset_page = 0;
while (offset_page < bitmap_len) {
if (read(info->fd_memory, buf, sizeof(buf)) != sizeof(buf)) {
ERRMSG("Can't read %s. %s\n",
info->name_memory, strerror(errno));
return FALSE;
}
/*
* sadump formats associate each bit in a bitmap with
* a physical page in reverse order with the
* kdump-compressed format. We need to change bit
* order to reuse bitmaps in sadump formats in the
* kdump-compressed format.
*/
reverse_bit(buf, sizeof(buf));
if (write(info->bitmap1->fd, buf, sizeof(buf)) != sizeof(buf)) {
ERRMSG("Can't write the bitmap(%s). %s\n",
info->bitmap1->file_name, strerror(errno));
return FALSE;
}
offset_page += sizeof(buf);
}
/*
* kdump uses the first 640kB on the 2nd kernel. But both
* bitmaps should reflect the 1st kernel memory situation. We
* modify bitmap accordingly.
*/
if (si->kdump_backed_up) {
unsigned long long paddr;
mdf_pfn_t pfn, backup_src_pfn;
for (paddr = si->backup_src_start;
paddr < si->backup_src_start + si->backup_src_size;
paddr += info->page_size) {
pfn = paddr_to_pfn(paddr);
backup_src_pfn = paddr_to_pfn(paddr +
si->backup_offset -
si->backup_src_start);
if (is_dumpable(info->bitmap_memory, backup_src_pfn, NULL))
set_bit_on_1st_bitmap(pfn, NULL);
else
clear_bit_on_1st_bitmap(pfn, NULL);
}
}
return TRUE;
}
int
sadump_generate_vmcoreinfo_from_vmlinux(size_t *vmcoreinfo_size)
{
size_t size;
if (!info->file_vmcoreinfo)
return FALSE;
if ((SYMBOL(system_utsname) == NOT_FOUND_SYMBOL) &&
(SYMBOL(init_uts_ns) == NOT_FOUND_SYMBOL)) {
ERRMSG("Can't get the symbol of system_utsname.\n");
return FALSE;
}
if (get_mem_type() == NOT_FOUND_MEMTYPE) {
ERRMSG("Can't find the memory type.\n");
return FALSE;
}
strncpy(info->release, info->system_utsname.release,
strlen(info->system_utsname.release) + 1);
write_vmcoreinfo_data();
size = ftell(info->file_vmcoreinfo);
*vmcoreinfo_size = size;
return TRUE;
}
int
sadump_generate_elf_note_from_dumpfile(void)
{
size_t size_vmcoreinfo, size_pt_note;
int x_cpu;
unsigned long offset, offset_vmcoreinfo;
char *vmcoreinfo_buf = NULL;
int retval = FALSE;
if (!per_cpu_init())
return FALSE;
if (!(info->file_vmcoreinfo = tmpfile())) {
ERRMSG("Can't create a temporary strings(%s).\n",
FILENAME_VMCOREINFO);
return FALSE;
}
if (!sadump_generate_vmcoreinfo_from_vmlinux(&size_vmcoreinfo)) {
ERRMSG("Can't generate vmcoreinfo data.\n");
goto error;
}
if ((vmcoreinfo_buf = malloc(size_vmcoreinfo)) == NULL) {
ERRMSG("Can't allocate vmcoreinfo buffer. %s\n",
strerror(errno));
goto cleanup;
}
rewind(info->file_vmcoreinfo);
if (fread(vmcoreinfo_buf, size_vmcoreinfo, 1,
info->file_vmcoreinfo) != 1) {
ERRMSG("Can't read vmcoreinfo temporary file. %s\n",
strerror(errno));
goto cleanup;
}
if (!(si->file_elf_note = tmpfile())) {
ERRMSG("Can't create a temporary elf_note file. %s\n",
strerror(errno));
goto cleanup;
}
if (!cpu_online_mask_init())
goto cleanup;
offset = 0;
for_each_online_cpu(x_cpu) {
struct elf_prstatus prstatus;
memset(&prstatus, 0, sizeof(prstatus));
if (!get_registers(x_cpu, &prstatus))
goto cleanup;
if (!write_elf_note_header("CORE", &prstatus, sizeof(prstatus),
NT_PRSTATUS, &offset, NULL))
goto cleanup;
}
if (!write_elf_note_header("VMCOREINFO", vmcoreinfo_buf,
size_vmcoreinfo, 0, &offset,
&offset_vmcoreinfo))
goto cleanup;
size_pt_note = ftell(si->file_elf_note);
set_pt_note(0, size_pt_note);
set_vmcoreinfo(offset_vmcoreinfo, size_vmcoreinfo);
retval = TRUE;
cleanup:
free(vmcoreinfo_buf);
if (info->file_vmcoreinfo) {
fclose(info->file_vmcoreinfo);
info->file_vmcoreinfo = NULL;
}
error:
return retval;
}
static char *
guid_to_str(efi_guid_t *guid, char *buf, size_t buflen)
{
snprintf(buf, buflen,
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
htonl(guid->data1), htons(guid->data2), htons(guid->data3),
guid->data4[0], guid->data4[1], guid->data4[2],
guid->data4[3], guid->data4[4], guid->data4[5],
guid->data4[6], guid->data4[7]);
return buf;
}
static struct tm *
efi_time_t_to_tm(const efi_time_t *e)
{
static struct tm t;
time_t ti;
memset(&t, 0, sizeof(t));
t.tm_sec = e->second;
t.tm_min = e->minute;
t.tm_hour = e->hour;
t.tm_mday = e->day;
t.tm_mon = e->month - 1;
t.tm_year = e->year - 1900;
if (e->timezone != EFI_UNSPECIFIED_TIMEZONE)
t.tm_hour += e->timezone;
else
DEBUG_MSG("sadump: timezone information is missing\n");
ti = mktime(&t);
if (ti == (time_t)-1)
return &t;
return localtime_r(&ti, &t);
}
static int
verify_magic_number(uint32_t magicnum[DUMP_PART_HEADER_MAGICNUM_SIZE])
{
int i;
for (i = 1; i < DUMP_PART_HEADER_MAGICNUM_SIZE; ++i)
if (magicnum[i] != (magicnum[i - 1] + 7) * 11)
return FALSE;
return TRUE;
}
static int
read_device(void *buf, size_t bytes, ulong *offset)
{
if (lseek(info->fd_memory, *offset, SEEK_SET) < 0) {
ERRMSG("Can't seek a file(%s). %s\n",
info->name_memory, strerror(errno));
return FALSE;
}
if (read(info->fd_memory, buf, bytes) != bytes) {
ERRMSG("Can't read a file(%s). %s\n",
info->name_memory, strerror(errno));
return FALSE;
}
*offset += bytes;
return TRUE;
}
static int
read_device_diskset(struct sadump_diskset_info *sdi, void *buf,
size_t bytes, unsigned long *offset)
{
if (lseek(sdi->fd_memory, *offset, SEEK_SET) < 0) {
ERRMSG("Can't seek a file(%s). %s\n",
sdi->name_memory, strerror(errno));
return FALSE;
}
if (read(sdi->fd_memory, buf, bytes) != bytes) {
ERRMSG("Can't read a file(%s). %s\n",
sdi->name_memory, strerror(errno));
return FALSE;
}
*offset += bytes;
return TRUE;
}
static int
read_sadump_header(char *filename)
{
struct sadump_part_header *sph = NULL;
struct sadump_header *sh = NULL;
struct sadump_disk_set_header *sdh = NULL;
struct sadump_media_header *smh = NULL;
unsigned long offset = 0, sub_hdr_offset;
unsigned long block_size = SADUMP_DEFAULT_BLOCK_SIZE;
unsigned long bitmap_len, dumpable_bitmap_len;
enum sadump_format_type flag_sadump;
uint32_t smram_cpu_state_size = 0;
char guid[SADUMP_EFI_GUID_TEXT_REPR_LEN+1];
if ((si->sph_memory = malloc(SADUMP_DEFAULT_BLOCK_SIZE)) == NULL) {
ERRMSG("Can't allocate memory for partition header buffer: "
"%s\n", strerror(errno));
return FALSE;
}
if ((si->sh_memory = malloc(SADUMP_DEFAULT_BLOCK_SIZE)) == NULL) {
ERRMSG("Can't allocate memory for dump header buffer: "
"%s\n", strerror(errno));
return FALSE;
}
if ((si->sdh_memory = malloc(SADUMP_DEFAULT_BLOCK_SIZE)) == NULL) {
ERRMSG("Can't allocate memory for disk set header buffer: "
"%s\n", strerror(errno));
return FALSE;
}
if ((si->smh_memory = malloc(SADUMP_DEFAULT_BLOCK_SIZE)) == NULL) {
ERRMSG("Can't allocate memory for media header buffer: "
"%s\n", strerror(errno));
return FALSE;
}
sph = si->sph_memory;
sh = si->sh_memory;
sdh = si->sdh_memory;
smh = si->smh_memory;
restart:
if (!read_device(sph, block_size, &offset))
return ERROR;
if (sph->signature1 == SADUMP_SIGNATURE1 &&
sph->signature2 == SADUMP_SIGNATURE2) {
if (sph->set_disk_set == 0) {
flag_sadump = SADUMP_SINGLE_PARTITION;
DEBUG_MSG("sadump: read dump device as single partition\n");
} else {
flag_sadump = SADUMP_DISKSET;
DEBUG_MSG("sadump: read dump device as diskset\n");
}
} else {
offset = 0;
if (!read_device(smh, block_size, &offset))
return ERROR;
if (!read_device(sph, block_size, &offset))
return ERROR;
if (sph->signature1 != SADUMP_SIGNATURE1 ||
sph->signature2 != SADUMP_SIGNATURE2) {
DEBUG_MSG("sadump: does not have partition header\n");
flag_sadump = SADUMP_UNKNOWN;
DEBUG_MSG("sadump: read dump device as unknown format\n");
goto out;
}
flag_sadump = SADUMP_MEDIA_BACKUP;
DEBUG_MSG("sadump: read dump device as media backup format\n");
}
if (!verify_magic_number(sph->magicnum)) {
DEBUG_MSG("sadump: invalid magic number\n");
return FALSE;
}
if (flag_sadump == SADUMP_DISKSET) {
uint32_t header_blocks;
size_t header_size;
if (sph->set_disk_set != 1) {
DEBUG_MSG("sadump: id of this disk is %d\n",
sph->set_disk_set);
return FALSE;
}
if (!read_device(&header_blocks, sizeof(uint32_t),
&offset))
return FALSE;
offset -= sizeof(uint32_t);
header_size = header_blocks * block_size;
if (header_size > block_size) {
sdh = realloc(sdh, header_size);
if (!sdh) {
ERRMSG("Can't allocate memory for disk "
"set memory\n");
return FALSE;
}
}
if (!read_device(sdh, header_size, &offset))
return ERROR;
DEBUG_MSG("sadump: the diskset consists of %u disks\n",
sdh->disk_num);
}
if (!read_device(sh, block_size, &offset))
return FALSE;
sub_hdr_offset = offset;
if (strncmp(sh->signature, SADUMP_SIGNATURE, 8) != 0) {
DEBUG_MSG("sadump: does not have dump header\n");
return FALSE;
}
if (flag_sadump == SADUMP_MEDIA_BACKUP) {
if (memcmp(&sph->sadump_id, &smh->sadump_id,
sizeof(efi_guid_t)) != 0) {
DEBUG_MSG("sadump: system ID mismatch\n");
DEBUG_MSG(" partition header: %s\n",
guid_to_str(&sph->sadump_id, guid,
sizeof(guid)));
DEBUG_MSG(" media header: %s\n",
guid_to_str(&smh->sadump_id, guid,
sizeof(guid)));
return FALSE;
}
if (memcmp(&sph->disk_set_id, &smh->disk_set_id,
sizeof(efi_guid_t)) != 0) {
DEBUG_MSG("sadump: disk set ID mismtch\n");
DEBUG_MSG(" partition header: %s\n",
guid_to_str(&sph->disk_set_id, guid,
sizeof(guid)));
DEBUG_MSG(" media header: %s\n",
guid_to_str(&smh->disk_set_id, guid,
sizeof(guid)));
return FALSE;
}
if (memcmp(&sph->time_stamp, &smh->time_stamp,
sizeof(efi_time_t)) != 0) {
DEBUG_MSG("sadump: time stamp mismatch\n");
DEBUG_MSG(" partition header: %s",
asctime(efi_time_t_to_tm(&sph->time_stamp)));
DEBUG_MSG(" media header: %s",
asctime(efi_time_t_to_tm(&smh->time_stamp)));
}
if (smh->sequential_num != 1) {
DEBUG_MSG("sadump: first media file has sequential "
"number %d\n", smh->sequential_num);
return FALSE;
}
}
if (sh->block_size != block_size) {
block_size = sh->block_size;
offset = 0;
goto restart;
}
if (sh->sub_hdr_size > 0) {
if (!read_device(&smram_cpu_state_size, sizeof(uint32_t),
&offset)) {
DEBUG_MSG("sadump: cannot read SMRAM CPU STATE size\n");
return FALSE;
}
smram_cpu_state_size /= sh->nr_cpus;
offset -= sizeof(uint32_t);
offset += sh->sub_hdr_size * block_size;
}
switch (sh->header_version) {
case 0:
si->max_mapnr = (mdf_pfn_t)(uint64_t)sh->max_mapnr;
break;
default:
ERRMSG("sadump: unsupported header version: %u\n"
"sadump: assuming header version: 1\n",
sh->header_version);
case 1:
si->max_mapnr = (mdf_pfn_t)sh->max_mapnr_64;
break;
}
if (!sh->bitmap_blocks) {
DEBUG_MSG("sadump: bitmap_blocks is zero\n");
return FALSE;
}
if (!sh->dumpable_bitmap_blocks) {
DEBUG_MSG("sadump: dumpable_bitmap_blocks is zero\n");
return FALSE;
}
bitmap_len = block_size * sh->bitmap_blocks;
dumpable_bitmap_len = block_size * sh->dumpable_bitmap_blocks;
si->sub_hdr_offset = sub_hdr_offset;
si->smram_cpu_state_size = smram_cpu_state_size;
si->data_offset = offset + bitmap_len + dumpable_bitmap_len;
out:
switch (flag_sadump) {
case SADUMP_SINGLE_PARTITION:
DEBUG_MSG("sadump: single partition configuration\n");
break;
case SADUMP_DISKSET:
DEBUG_MSG("sadump: diskset configuration with %d disks\n",
sdh->disk_num);
break;
case SADUMP_MEDIA_BACKUP:
DEBUG_MSG("sadump: media backup file\n");
break;
case SADUMP_UNKNOWN:
DEBUG_MSG("sadump: unknown format\n");
break;
}
info->flag_sadump = flag_sadump;
return TRUE;
}
static int
read_sadump_header_diskset(int diskid, struct sadump_diskset_info *sdi)
{
struct sadump_part_header *sph = NULL;
unsigned long offset = 0;
char guid[SADUMP_EFI_GUID_TEXT_REPR_LEN+1];
if ((sph = malloc(si->sh_memory->block_size)) == NULL) {
ERRMSG("Can't allocate memory for partition header buffer. "
"%s\n", strerror(errno));
goto error;
}
if (!read_device_diskset(sdi, sph, si->sh_memory->block_size,
&offset))
goto error;
if (sph->signature1 != SADUMP_SIGNATURE1 ||
sph->signature2 != SADUMP_SIGNATURE2) {
DEBUG_MSG("sadump: does not have partition header\n");
goto error;
}
if (memcmp(&si->sph_memory->sadump_id, &sph->sadump_id,
sizeof(efi_guid_t)) != 0) {
DEBUG_MSG("sadump: system ID mismatch\n");
DEBUG_MSG(" partition header on disk #1: %s\n",
guid_to_str(&si->sph_memory->sadump_id, guid,
sizeof(guid)));
DEBUG_MSG(" partition header on disk #%d: %s\n", diskid,
guid_to_str(&sph->sadump_id, guid, sizeof(guid)));
goto error;
}
if (memcmp(&si->sph_memory->disk_set_id, &sph->disk_set_id,
sizeof(efi_guid_t)) != 0) {
DEBUG_MSG("sadump: disk set ID mismatch\n");
DEBUG_MSG(" partition header on disk #1: %s\n",
guid_to_str(&si->sph_memory->disk_set_id, guid,
sizeof(guid)));
DEBUG_MSG(" partition header on disk #%d: %s\n", diskid,
guid_to_str(&sph->disk_set_id, guid, sizeof(guid)));
goto error;
}
if (memcmp(&si->sdh_memory->vol_info[diskid-1].id, &sph->vol_id,
sizeof(efi_guid_t)) != 0) {
DEBUG_MSG("sadump: volume ID mismatch\n");
DEBUG_MSG(" disk set header on disk #1: %s\n",
guid_to_str(&si->sdh_memory->vol_info[diskid-1].id,
guid, sizeof(guid)));
DEBUG_MSG(" partition header on disk #%d: %s\n",
diskid+1,
guid_to_str(&sph->vol_id, guid, sizeof(guid)));
goto error;
}
if (memcmp(&si->sph_memory->time_stamp, &sph->time_stamp,
sizeof(efi_time_t)) != 0) {
DEBUG_MSG("sadump time stamp mismatch\n");
DEBUG_MSG(" partition header on disk #1: %s\n",
asctime(efi_time_t_to_tm
(&si->sph_memory->time_stamp)));
DEBUG_MSG(" partition header on disk #%d: %s\n",
diskid, asctime(efi_time_t_to_tm(&sph->time_stamp)));
}
if (diskid+1 != sph->set_disk_set) {
DEBUG_MSG("sadump: wrong disk order; #%d expected but #%d given\n",
diskid+1, sph->set_disk_set);
goto error;
}
sdi->sph_memory = sph;
sdi->data_offset = si->sh_memory->block_size;
return TRUE;
error:
free(sph);
return FALSE;
}
int
sadump_initialize_bitmap_memory(void)
{
struct sadump_header *sh = si->sh_memory;
struct dump_bitmap *bmp;
unsigned long dumpable_bitmap_offset;
unsigned long long section, max_section;
mdf_pfn_t pfn;
unsigned long long *block_table;
dumpable_bitmap_offset =
si->sub_hdr_offset +
sh->block_size * (sh->sub_hdr_size + sh->bitmap_blocks);
bmp = malloc(sizeof(struct dump_bitmap));
if (bmp == NULL) {
ERRMSG("Can't allocate memory for the memory-bitmap. %s\n",
strerror(errno));
return FALSE;
}
bmp->fd = info->fd_memory;
bmp->file_name = info->name_memory;
bmp->no_block = -1;
memset(bmp->buf, 0, BUFSIZE_BITMAP);
bmp->offset = dumpable_bitmap_offset;
max_section = divideup(si->max_mapnr, SADUMP_PF_SECTION_NUM);
block_table = calloc(sizeof(unsigned long long), max_section);
if (block_table == NULL) {
ERRMSG("Can't allocate memory for the block_table. %s\n",
strerror(errno));
free(bmp);
return FALSE;
}
for (section = 0; section < max_section; ++section) {
if (section > 0)
block_table[section] = block_table[section-1];
for (pfn = section * SADUMP_PF_SECTION_NUM;
pfn < (section + 1) * SADUMP_PF_SECTION_NUM;
++pfn)
if (is_dumpable(bmp, pfn, NULL))
block_table[section]++;
}
info->bitmap_memory = bmp;
si->block_table = block_table;
bmp = malloc(sizeof(struct dump_bitmap));
if (bmp == NULL) {
ERRMSG("Can't allocate memory for the memory-bitmap. %s\n",
strerror(errno));
return FALSE;
}
bmp->fd = info->fd_memory;
bmp->file_name = info->name_memory;
bmp->no_block = -1;
memset(bmp->buf, 0, BUFSIZE_BITMAP);
bmp->offset = si->sub_hdr_offset + sh->block_size * sh->sub_hdr_size;
si->ram_bitmap = bmp;
/*
* Perform explicitly zero filtering. Without this processing
* crash utility faces different behaviors on reading zero
* pages that are filtered out on the kdump-compressed format
* originating from kdump ELF and from sadump formats: the
* former succeeds in reading zero pages but the latter fails.
*/
for (pfn = 0; pfn < si->max_mapnr; pfn++) {
if (sadump_is_ram(pfn) &&
!sadump_is_dumpable(info->bitmap_memory, pfn)) {
info->dump_level |= DL_EXCLUDE_ZERO;
break;
}
}
return TRUE;
}
static int
max_mask_cpu(void)
{
return BITPERBYTE * si->cpumask_size;
}
static int
cpu_online_mask_init(void)
{
ulong cpu_online_mask_addr;
if (si->cpu_online_mask_buf && si->cpumask_size)
return TRUE;
if (SYMBOL(cpu_online_mask) == NOT_FOUND_SYMBOL ||
(SIZE(cpumask) == NOT_FOUND_STRUCTURE &&
SIZE(cpumask_t) == NOT_FOUND_STRUCTURE))
return FALSE;
si->cpumask_size = SIZE(cpumask) == NOT_FOUND_STRUCTURE
? SIZE(cpumask_t)
: SIZE(cpumask);
if (!(si->cpu_online_mask_buf = calloc(1, si->cpumask_size))) {
ERRMSG("Can't allocate cpu_online_mask buffer. %s\n",
strerror(errno));
return FALSE;
}
if (SIZE(cpumask) == NOT_FOUND_STRUCTURE)
cpu_online_mask_addr = SYMBOL(cpu_online_mask);
else {
if (!readmem(VADDR, SYMBOL(cpu_online_mask),
&cpu_online_mask_addr, sizeof(unsigned long))) {
ERRMSG("Can't read cpu_online_mask pointer.\n");
return FALSE;
}
}
if (!readmem(VADDR, cpu_online_mask_addr, si->cpu_online_mask_buf,
si->cpumask_size)) {
ERRMSG("Can't read cpu_online_mask memory.\n");
return FALSE;
}
return TRUE;
}
int
sadump_num_online_cpus(void)
{
int cpu, count = 0;
if (!cpu_online_mask_init())
return FALSE;
DEBUG_MSG("sadump: online cpus:");
for_each_online_cpu(cpu) {
count++;
DEBUG_MSG(" %d", cpu);
}
DEBUG_MSG("\nsadump: nr_cpus: %d\n", count);
return count;
}
int
sadump_set_timestamp(struct timeval *ts)
{
static struct tm t;
efi_time_t *e = &si->sph_memory->time_stamp;
time_t ti;
memset(&t, 0, sizeof(t));
t.tm_sec = e->second;
t.tm_min = e->minute;
t.tm_hour = e->hour;
t.tm_mday = e->day;
t.tm_mon = e->month - 1;
t.tm_year = e->year - 1900;
if (e->timezone != EFI_UNSPECIFIED_TIMEZONE)
t.tm_hour += e->timezone;
else
DEBUG_MSG("sadump: timezone information is missing\n");
ti = mktime(&t);
if (ti == (time_t)-1)
return FALSE;
ts->tv_sec = ti;
ts->tv_usec = 0;
return TRUE;
}
mdf_pfn_t
sadump_get_max_mapnr(void)
{
return si->max_mapnr;