*
*/
-#include "qemu-common.h"
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
#include "elf.h"
#include "cpu.h"
#include "exec/cpu-all.h"
#include "sysemu/sysemu.h"
#include "sysemu/memory_mapping.h"
#include "sysemu/cpus.h"
-#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "qmp-commands.h"
+#include "qapi-event.h"
#include <zlib.h>
#ifdef CONFIG_LZO
return 0;
}
-static void dump_error(DumpState *s, const char *reason, Error **errp)
-{
- dump_cleanup(s);
- error_setg(errp, "%s", reason);
-}
-
static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
{
DumpState *s = opaque;
ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
if (ret < 0) {
- dump_error(s, "dump: failed to write elf header", errp);
+ error_setg(errp, "dump: failed to write elf header");
}
}
ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
if (ret < 0) {
- dump_error(s, "dump: failed to write elf header", errp);
+ error_setg(errp, "dump: failed to write elf header");
}
}
ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
if (ret < 0) {
- dump_error(s, "dump: failed to write program header table", errp);
+ error_setg(errp, "dump: failed to write program header table");
}
}
ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
if (ret < 0) {
- dump_error(s, "dump: failed to write program header table", errp);
+ error_setg(errp, "dump: failed to write program header table");
}
}
ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
if (ret < 0) {
- dump_error(s, "dump: failed to write program header table", errp);
+ error_setg(errp, "dump: failed to write program header table");
}
}
id = cpu_index(cpu);
ret = cpu_write_elf64_note(f, cpu, id, s);
if (ret < 0) {
- dump_error(s, "dump: failed to write elf notes", errp);
+ error_setg(errp, "dump: failed to write elf notes");
return;
}
}
CPU_FOREACH(cpu) {
ret = cpu_write_elf64_qemunote(f, cpu, s);
if (ret < 0) {
- dump_error(s, "dump: failed to write CPU status", errp);
+ error_setg(errp, "dump: failed to write CPU status");
return;
}
}
ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
if (ret < 0) {
- dump_error(s, "dump: failed to write program header table", errp);
+ error_setg(errp, "dump: failed to write program header table");
}
}
id = cpu_index(cpu);
ret = cpu_write_elf32_note(f, cpu, id, s);
if (ret < 0) {
- dump_error(s, "dump: failed to write elf notes", errp);
+ error_setg(errp, "dump: failed to write elf notes");
return;
}
}
CPU_FOREACH(cpu) {
ret = cpu_write_elf32_qemunote(f, cpu, s);
if (ret < 0) {
- dump_error(s, "dump: failed to write CPU status", errp);
+ error_setg(errp, "dump: failed to write CPU status");
return;
}
}
ret = fd_write_vmcore(&shdr, shdr_size, s);
if (ret < 0) {
- dump_error(s, "dump: failed to write section header table", errp);
+ error_setg(errp, "dump: failed to write section header table");
}
}
ret = fd_write_vmcore(buf, length, s);
if (ret < 0) {
- dump_error(s, "dump: failed to save memory", errp);
+ error_setg(errp, "dump: failed to save memory");
+ } else {
+ s->written_size += length;
}
}
int64_t i;
Error *local_err = NULL;
- for (i = 0; i < size / TARGET_PAGE_SIZE; i++) {
- write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE,
- TARGET_PAGE_SIZE, &local_err);
+ for (i = 0; i < size / s->dump_info.page_size; i++) {
+ write_data(s, block->host_addr + start + i * s->dump_info.page_size,
+ s->dump_info.page_size, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
- if ((size % TARGET_PAGE_SIZE) != 0) {
- write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE,
- size % TARGET_PAGE_SIZE, &local_err);
+ if ((size % s->dump_info.page_size) != 0) {
+ write_data(s, block->host_addr + start + i * s->dump_info.page_size,
+ size % s->dump_info.page_size, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
-static void dump_completed(DumpState *s)
-{
- dump_cleanup(s);
-}
-
static int get_next_block(DumpState *s, GuestPhysBlock *block)
{
while (1) {
}
} while (!get_next_block(s, block));
-
- dump_completed(s);
}
static void create_vmcore(DumpState *s, Error **errp)
strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE));
dh->header_version = cpu_to_dump32(s, 6);
- block_size = TARGET_PAGE_SIZE;
+ block_size = s->dump_info.page_size;
dh->block_size = cpu_to_dump32(s, block_size);
sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size;
sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size);
dh->status = cpu_to_dump32(s, status);
if (write_buffer(s->fd, 0, dh, size) < 0) {
- dump_error(s, "dump: failed to write disk dump header", errp);
+ error_setg(errp, "dump: failed to write disk dump header");
goto out;
}
/* 64bit max_mapnr_64 */
kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr);
- kh->phys_base = cpu_to_dump32(s, PHYS_BASE);
+ kh->phys_base = cpu_to_dump32(s, s->dump_info.phys_base);
kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL);
offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size;
if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
block_size, kh, size) < 0) {
- dump_error(s, "dump: failed to write kdump sub header", errp);
+ error_setg(errp, "dump: failed to write kdump sub header");
goto out;
}
}
if (write_buffer(s->fd, offset_note, s->note_buf,
s->note_size) < 0) {
- dump_error(s, "dump: failed to write notes", errp);
+ error_setg(errp, "dump: failed to write notes");
goto out;
}
strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE));
dh->header_version = cpu_to_dump32(s, 6);
- block_size = TARGET_PAGE_SIZE;
+ block_size = s->dump_info.page_size;
dh->block_size = cpu_to_dump32(s, block_size);
sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size;
sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size);
dh->status = cpu_to_dump32(s, status);
if (write_buffer(s->fd, 0, dh, size) < 0) {
- dump_error(s, "dump: failed to write disk dump header", errp);
+ error_setg(errp, "dump: failed to write disk dump header");
goto out;
}
/* 64bit max_mapnr_64 */
kh->max_mapnr_64 = cpu_to_dump64(s, s->max_mapnr);
- kh->phys_base = cpu_to_dump64(s, PHYS_BASE);
+ kh->phys_base = cpu_to_dump64(s, s->dump_info.phys_base);
kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL);
offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size;
if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
block_size, kh, size) < 0) {
- dump_error(s, "dump: failed to write kdump sub header", errp);
+ error_setg(errp, "dump: failed to write kdump sub header");
goto out;
}
if (write_buffer(s->fd, offset_note, s->note_buf,
s->note_size) < 0) {
- dump_error(s, "dump: failed to write notes", errp);
+ error_setg(errp, "dump: failed to write notes");
goto out;
}
}
}
+static size_t dump_bitmap_get_bufsize(DumpState *s)
+{
+ return s->dump_info.page_size;
+}
+
/*
* set dump_bitmap sequencely. the bit before last_pfn is not allowed to be
* rewritten, so if need to set the first bit, set last_pfn and pfn to 0.
off_t old_offset, new_offset;
off_t offset_bitmap1, offset_bitmap2;
uint32_t byte, bit;
+ size_t bitmap_bufsize = dump_bitmap_get_bufsize(s);
+ size_t bits_per_buf = bitmap_bufsize * CHAR_BIT;
/* should not set the previous place */
assert(last_pfn <= pfn);
* making new_offset be bigger than old_offset can also sync remained data
* into vmcore.
*/
- old_offset = BUFSIZE_BITMAP * (last_pfn / PFN_BUFBITMAP);
- new_offset = BUFSIZE_BITMAP * (pfn / PFN_BUFBITMAP);
+ old_offset = bitmap_bufsize * (last_pfn / bits_per_buf);
+ new_offset = bitmap_bufsize * (pfn / bits_per_buf);
while (old_offset < new_offset) {
/* calculate the offset and write dump_bitmap */
offset_bitmap1 = s->offset_dump_bitmap + old_offset;
if (write_buffer(s->fd, offset_bitmap1, buf,
- BUFSIZE_BITMAP) < 0) {
+ bitmap_bufsize) < 0) {
return -1;
}
offset_bitmap2 = s->offset_dump_bitmap + s->len_dump_bitmap +
old_offset;
if (write_buffer(s->fd, offset_bitmap2, buf,
- BUFSIZE_BITMAP) < 0) {
+ bitmap_bufsize) < 0) {
return -1;
}
- memset(buf, 0, BUFSIZE_BITMAP);
- old_offset += BUFSIZE_BITMAP;
+ memset(buf, 0, bitmap_bufsize);
+ old_offset += bitmap_bufsize;
}
/* get the exact place of the bit in the buf, and set it */
- byte = (pfn % PFN_BUFBITMAP) / CHAR_BIT;
- bit = (pfn % PFN_BUFBITMAP) % CHAR_BIT;
+ byte = (pfn % bits_per_buf) / CHAR_BIT;
+ bit = (pfn % bits_per_buf) % CHAR_BIT;
if (value) {
buf[byte] |= 1u << bit;
} else {
return 0;
}
+static uint64_t dump_paddr_to_pfn(DumpState *s, uint64_t addr)
+{
+ int target_page_shift = ctz32(s->dump_info.page_size);
+
+ return (addr >> target_page_shift) - ARCH_PFN_OFFSET;
+}
+
+static uint64_t dump_pfn_to_paddr(DumpState *s, uint64_t pfn)
+{
+ int target_page_shift = ctz32(s->dump_info.page_size);
+
+ return (pfn + ARCH_PFN_OFFSET) << target_page_shift;
+}
+
/*
* exam every page and return the page frame number and the address of the page.
* bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys
uint8_t **bufptr, DumpState *s)
{
GuestPhysBlock *block = *blockptr;
- hwaddr addr;
+ hwaddr addr, target_page_mask = ~((hwaddr)s->dump_info.page_size - 1);
uint8_t *buf;
/* block == NULL means the start of the iteration */
if (!block) {
block = QTAILQ_FIRST(&s->guest_phys_blocks.head);
*blockptr = block;
- assert((block->target_start & ~TARGET_PAGE_MASK) == 0);
- assert((block->target_end & ~TARGET_PAGE_MASK) == 0);
- *pfnptr = paddr_to_pfn(block->target_start);
+ assert((block->target_start & ~target_page_mask) == 0);
+ assert((block->target_end & ~target_page_mask) == 0);
+ *pfnptr = dump_paddr_to_pfn(s, block->target_start);
if (bufptr) {
*bufptr = block->host_addr;
}
}
*pfnptr = *pfnptr + 1;
- addr = pfn_to_paddr(*pfnptr);
+ addr = dump_pfn_to_paddr(s, *pfnptr);
if ((addr >= block->target_start) &&
- (addr + TARGET_PAGE_SIZE <= block->target_end)) {
+ (addr + s->dump_info.page_size <= block->target_end)) {
buf = block->host_addr + (addr - block->target_start);
} else {
/* the next page is in the next block */
if (!block) {
return false;
}
- assert((block->target_start & ~TARGET_PAGE_MASK) == 0);
- assert((block->target_end & ~TARGET_PAGE_MASK) == 0);
- *pfnptr = paddr_to_pfn(block->target_start);
+ assert((block->target_start & ~target_page_mask) == 0);
+ assert((block->target_end & ~target_page_mask) == 0);
+ *pfnptr = dump_paddr_to_pfn(s, block->target_start);
buf = block->host_addr;
}
void *dump_bitmap_buf;
size_t num_dumpable;
GuestPhysBlock *block_iter = NULL;
+ size_t bitmap_bufsize = dump_bitmap_get_bufsize(s);
+ size_t bits_per_buf = bitmap_bufsize * CHAR_BIT;
/* dump_bitmap_buf is used to store dump_bitmap temporarily */
- dump_bitmap_buf = g_malloc0(BUFSIZE_BITMAP);
+ dump_bitmap_buf = g_malloc0(bitmap_bufsize);
num_dumpable = 0;
last_pfn = 0;
while (get_next_page(&block_iter, &pfn, NULL, s)) {
ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s);
if (ret < 0) {
- dump_error(s, "dump: failed to set dump_bitmap", errp);
+ error_setg(errp, "dump: failed to set dump_bitmap");
goto out;
}
/*
* set_dump_bitmap will always leave the recently set bit un-sync. Here we
- * set last_pfn + PFN_BUFBITMAP to 0 and those set but un-sync bit will be
- * synchronized into vmcore.
+ * set the remaining bits from last_pfn to the end of the bitmap buffer to
+ * 0. With those set, the un-sync bit will be synchronized into the vmcore.
*/
if (num_dumpable > 0) {
- ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false,
+ ret = set_dump_bitmap(last_pfn, last_pfn + bits_per_buf, false,
dump_bitmap_buf, s);
if (ret < 0) {
- dump_error(s, "dump: failed to sync dump_bitmap", errp);
+ error_setg(errp, "dump: failed to sync dump_bitmap");
goto out;
}
}
{
data_cache->fd = s->fd;
data_cache->data_size = 0;
- data_cache->buf_size = BUFSIZE_DATA_CACHE;
- data_cache->buf = g_malloc0(BUFSIZE_DATA_CACHE);
+ data_cache->buf_size = 4 * dump_bitmap_get_bufsize(s);
+ data_cache->buf = g_malloc0(data_cache->buf_size);
data_cache->offset = offset;
}
prepare_data_cache(&page_data, s, offset_data);
/* prepare buffer to store compressed data */
- len_buf_out = get_len_buf_out(TARGET_PAGE_SIZE, s->flag_compress);
+ len_buf_out = get_len_buf_out(s->dump_info.page_size, s->flag_compress);
assert(len_buf_out != 0);
#ifdef CONFIG_LZO
* init zero page's page_desc and page_data, because every zero page
* uses the same page_data
*/
- pd_zero.size = cpu_to_dump32(s, TARGET_PAGE_SIZE);
+ pd_zero.size = cpu_to_dump32(s, s->dump_info.page_size);
pd_zero.flags = cpu_to_dump32(s, 0);
pd_zero.offset = cpu_to_dump64(s, offset_data);
pd_zero.page_flags = cpu_to_dump64(s, 0);
- buf = g_malloc0(TARGET_PAGE_SIZE);
- ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false);
+ buf = g_malloc0(s->dump_info.page_size);
+ ret = write_cache(&page_data, buf, s->dump_info.page_size, false);
g_free(buf);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data (zero page)", errp);
+ error_setg(errp, "dump: failed to write page data (zero page)");
goto out;
}
- offset_data += TARGET_PAGE_SIZE;
+ offset_data += s->dump_info.page_size;
/*
* dump memory to vmcore page by page. zero page will all be resided in the
*/
while (get_next_page(&block_iter, &pfn_iter, &buf, s)) {
/* check zero page */
- if (is_zero_page(buf, TARGET_PAGE_SIZE)) {
+ if (is_zero_page(buf, s->dump_info.page_size)) {
ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor),
false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page desc", errp);
+ error_setg(errp, "dump: failed to write page desc");
goto out;
}
} else {
size_out = len_buf_out;
if ((s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) &&
(compress2(buf_out, (uLongf *)&size_out, buf,
- TARGET_PAGE_SIZE, Z_BEST_SPEED) == Z_OK) &&
- (size_out < TARGET_PAGE_SIZE)) {
+ s->dump_info.page_size, Z_BEST_SPEED) == Z_OK) &&
+ (size_out < s->dump_info.page_size)) {
pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_ZLIB);
pd.size = cpu_to_dump32(s, size_out);
ret = write_cache(&page_data, buf_out, size_out, false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data", errp);
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
#ifdef CONFIG_LZO
} else if ((s->flag_compress & DUMP_DH_COMPRESSED_LZO) &&
- (lzo1x_1_compress(buf, TARGET_PAGE_SIZE, buf_out,
+ (lzo1x_1_compress(buf, s->dump_info.page_size, buf_out,
(lzo_uint *)&size_out, wrkmem) == LZO_E_OK) &&
- (size_out < TARGET_PAGE_SIZE)) {
+ (size_out < s->dump_info.page_size)) {
pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_LZO);
pd.size = cpu_to_dump32(s, size_out);
ret = write_cache(&page_data, buf_out, size_out, false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data", errp);
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
#endif
#ifdef CONFIG_SNAPPY
} else if ((s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) &&
- (snappy_compress((char *)buf, TARGET_PAGE_SIZE,
+ (snappy_compress((char *)buf, s->dump_info.page_size,
(char *)buf_out, &size_out) == SNAPPY_OK) &&
- (size_out < TARGET_PAGE_SIZE)) {
+ (size_out < s->dump_info.page_size)) {
pd.flags = cpu_to_dump32(s, DUMP_DH_COMPRESSED_SNAPPY);
pd.size = cpu_to_dump32(s, size_out);
ret = write_cache(&page_data, buf_out, size_out, false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data", errp);
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
#endif
} else {
/*
* fall back to save in plaintext, size_out should be
- * assigned TARGET_PAGE_SIZE
+ * assigned the target's page size
*/
pd.flags = cpu_to_dump32(s, 0);
- size_out = TARGET_PAGE_SIZE;
+ size_out = s->dump_info.page_size;
pd.size = cpu_to_dump32(s, size_out);
- ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false);
+ ret = write_cache(&page_data, buf,
+ s->dump_info.page_size, false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page data", errp);
+ error_setg(errp, "dump: failed to write page data");
goto out;
}
}
ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false);
if (ret < 0) {
- dump_error(s, "dump: failed to write page desc", errp);
+ error_setg(errp, "dump: failed to write page desc");
goto out;
}
}
+ s->written_size += s->dump_info.page_size;
}
ret = write_cache(&page_desc, NULL, 0, true);
if (ret < 0) {
- dump_error(s, "dump: failed to sync cache for page_desc", errp);
+ error_setg(errp, "dump: failed to sync cache for page_desc");
goto out;
}
ret = write_cache(&page_data, NULL, 0, true);
if (ret < 0) {
- dump_error(s, "dump: failed to sync cache for page_data", errp);
+ error_setg(errp, "dump: failed to sync cache for page_data");
goto out;
}
ret = write_start_flat_header(s->fd);
if (ret < 0) {
- dump_error(s, "dump: failed to write start flat header", errp);
+ error_setg(errp, "dump: failed to write start flat header");
return;
}
ret = write_end_flat_header(s->fd);
if (ret < 0) {
- dump_error(s, "dump: failed to write end flat header", errp);
+ error_setg(errp, "dump: failed to write end flat header");
return;
}
-
- dump_completed(s);
}
static ram_addr_t get_start_block(DumpState *s)
GuestPhysBlock *last_block;
last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead);
- s->max_mapnr = paddr_to_pfn(last_block->target_end);
+ s->max_mapnr = dump_paddr_to_pfn(s, last_block->target_end);
+}
+
+static DumpState dump_state_global = { .status = DUMP_STATUS_NONE };
+
+static void dump_state_prepare(DumpState *s)
+{
+ /* zero the struct, setting status to active */
+ *s = (DumpState) { .status = DUMP_STATUS_ACTIVE };
+}
+
+bool dump_in_progress(void)
+{
+ DumpState *state = &dump_state_global;
+ return (atomic_read(&state->status) == DUMP_STATUS_ACTIVE);
+}
+
+/* calculate total size of memory to be dumped (taking filter into
+ * acoount.) */
+static int64_t dump_calculate_size(DumpState *s)
+{
+ GuestPhysBlock *block;
+ int64_t size = 0, total = 0, left = 0, right = 0;
+
+ QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
+ if (s->has_filter) {
+ /* calculate the overlapped region. */
+ left = MAX(s->begin, block->target_start);
+ right = MIN(s->begin + s->length, block->target_end);
+ size = right - left;
+ size = size > 0 ? size : 0;
+ } else {
+ /* count the whole region in */
+ size = (block->target_end - block->target_start);
+ }
+ total += size;
+ }
+
+ return total;
}
static void dump_init(DumpState *s, int fd, bool has_format,
Error *err = NULL;
int ret;
+ s->has_format = has_format;
+ s->format = format;
+ s->written_size = 0;
+
/* kdump-compressed is conflict with paging and filter */
if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
assert(!paging && !has_filter);
guest_phys_blocks_init(&s->guest_phys_blocks);
guest_phys_blocks_append(&s->guest_phys_blocks);
+ s->total_size = dump_calculate_size(s);
+#ifdef DEBUG_DUMP_GUEST_MEMORY
+ fprintf(stderr, "DUMP: total memory to dump: %lu\n", s->total_size);
+#endif
s->start = get_start_block(s);
if (s->start == -1) {
goto cleanup;
}
+ if (!s->dump_info.page_size) {
+ s->dump_info.page_size = TARGET_PAGE_SIZE;
+ }
+
s->note_size = cpu_get_note_size(s->dump_info.d_class,
s->dump_info.d_machine, nr_cpus);
if (s->note_size < 0) {
get_max_mapnr(s);
uint64_t tmp;
- tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), TARGET_PAGE_SIZE);
- s->len_dump_bitmap = tmp * TARGET_PAGE_SIZE;
+ tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT),
+ s->dump_info.page_size);
+ s->len_dump_bitmap = tmp * s->dump_info.page_size;
/* init for kdump-compressed format */
if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
dump_cleanup(s);
}
-void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
- int64_t begin, bool has_length,
+/* this operation might be time consuming. */
+static void dump_process(DumpState *s, Error **errp)
+{
+ Error *local_err = NULL;
+ DumpQueryResult *result = NULL;
+
+ if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
+ create_kdump_vmcore(s, &local_err);
+ } else {
+ create_vmcore(s, &local_err);
+ }
+
+ /* make sure status is written after written_size updates */
+ smp_wmb();
+ atomic_set(&s->status,
+ (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED));
+
+ /* send DUMP_COMPLETED message (unconditionally) */
+ result = qmp_query_dump(NULL);
+ /* should never fail */
+ assert(result);
+ qapi_event_send_dump_completed(result, !!local_err, (local_err ? \
+ error_get_pretty(local_err) : NULL),
+ &error_abort);
+ qapi_free_DumpQueryResult(result);
+
+ error_propagate(errp, local_err);
+ dump_cleanup(s);
+}
+
+static void *dump_thread(void *data)
+{
+ Error *err = NULL;
+ DumpState *s = (DumpState *)data;
+ dump_process(s, &err);
+ error_free(err);
+ return NULL;
+}
+
+DumpQueryResult *qmp_query_dump(Error **errp)
+{
+ DumpQueryResult *result = g_new(DumpQueryResult, 1);
+ DumpState *state = &dump_state_global;
+ result->status = atomic_read(&state->status);
+ /* make sure we are reading status and written_size in order */
+ smp_rmb();
+ result->completed = state->written_size;
+ result->total = state->total_size;
+ return result;
+}
+
+void qmp_dump_guest_memory(bool paging, const char *file,
+ bool has_detach, bool detach,
+ bool has_begin, int64_t begin, bool has_length,
int64_t length, bool has_format,
DumpGuestMemoryFormat format, Error **errp)
{
int fd = -1;
DumpState *s;
Error *local_err = NULL;
+ bool detach_p = false;
+
+ if (runstate_check(RUN_STATE_INMIGRATE)) {
+ error_setg(errp, "Dump not allowed during incoming migration.");
+ return;
+ }
+
+ /* if there is a dump in background, we should wait until the dump
+ * finished */
+ if (dump_in_progress()) {
+ error_setg(errp, "There is a dump in process, please wait.");
+ return;
+ }
/*
* kdump-compressed format need the whole memory dumped, so paging or
error_setg(errp, QERR_MISSING_PARAMETER, "begin");
return;
}
+ if (has_detach) {
+ detach_p = detach;
+ }
/* check whether lzo/snappy is supported */
#ifndef CONFIG_LZO
return;
}
- s = g_malloc0(sizeof(DumpState));
+ s = &dump_state_global;
+ dump_state_prepare(s);
dump_init(s, fd, has_format, format, paging, has_begin,
begin, length, &local_err);
if (local_err) {
- g_free(s);
error_propagate(errp, local_err);
+ atomic_set(&s->status, DUMP_STATUS_FAILED);
return;
}
- if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
- create_kdump_vmcore(s, errp);
+ if (detach_p) {
+ /* detached dump */
+ qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread,
+ s, QEMU_THREAD_DETACHED);
} else {
- create_vmcore(s, errp);
+ /* sync dump */
+ dump_process(s, errp);
}
-
- g_free(s);
}
DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)
Code Review / kvmfornfv.git / blobdiff