*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
+#include "qemu/cutils.h"
#include "elf.h"
#include "cpu.h"
#include "exec/cpu-all.h"
#include "sysemu/cpus.h"
#include "qapi/qmp/qerror.h"
#include "qmp-commands.h"
+#include "qapi-event.h"
#include <zlib.h>
#ifdef CONFIG_LZO
ret = fd_write_vmcore(buf, length, s);
if (ret < 0) {
error_setg(errp, "dump: failed to save memory");
+ } else {
+ s->written_size += length;
}
}
} else {
create_header64(s, &local_err);
}
- if (local_err) {
- error_propagate(errp, local_err);
- }
+ error_propagate(errp, local_err);
}
static size_t dump_bitmap_get_bufsize(DumpState *s)
goto out;
}
}
+ s->written_size += s->dump_info.page_size;
}
ret = write_cache(&page_desc, NULL, 0, true);
*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,
DumpGuestMemoryFormat format, bool paging, bool has_filter,
int64_t begin, int64_t length, Error **errp)
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) {
dump_cleanup(s);
}
+/* 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,
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
begin, length, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- s->status = DUMP_STATUS_FAILED;
+ atomic_set(&s->status, DUMP_STATUS_FAILED);
return;
}
- if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
- create_kdump_vmcore(s, &local_err);
+ if (detach_p) {
+ /* detached dump */
+ qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread,
+ s, QEMU_THREAD_DETACHED);
} else {
- create_vmcore(s, &local_err);
+ /* sync dump */
+ dump_process(s, errp);
}
-
- s->status = (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED);
- error_propagate(errp, local_err);
-
- dump_cleanup(s);
}
DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)
projects / mirror_qemu.git / blobdiff