@@ -15,23 +15,37 @@
#ifndef QEMU_MIGRATION_SNAPSHOT_H
#define QEMU_MIGRATION_SNAPSHOT_H
+#include "qapi/qapi-builtin-types.h"
+
/**
* save_snapshot: Save an internal snapshot.
* @name: name of internal snapshot
* @overwrite: replace existing snapshot with @name
+ * @vmstate: blockdev node name to store VM state in
+ * @has_devices: whether to use explicit device list
+ * @devices: explicit device list to snapshot
* @errp: pointer to error object
* On success, return %true.
* On failure, store an error through @errp and return %false.
*/
-bool save_snapshot(const char *name, bool overwrite, Error **errp);
+bool save_snapshot(const char *name, bool overwrite,
+ const char *vmstate,
+ bool has_devices, strList *devices,
+ Error **errp);
/**
* load_snapshot: Load an internal snapshot.
* @name: name of internal snapshot
+ * @vmstate: blockdev node name to load VM state from
+ * @has_devices: whether to use explicit device list
+ * @devices: explicit device list to snapshot
* @errp: pointer to error object
* On success, return %true.
* On failure, store an error through @errp and return %false.
*/
-bool load_snapshot(const char *name, Error **errp);
+bool load_snapshot(const char *name,
+ const char *vmstate,
+ bool has_devices, strList *devices,
+ Error **errp);
#endif
@@ -43,6 +43,8 @@
#include "qapi/error.h"
#include "qapi/qapi-commands-migration.h"
#include "qapi/qapi-commands-misc.h"
+#include "qapi/clone-visitor.h"
+#include "qapi/qapi-builtin-visit.h"
#include "qapi/qmp/qerror.h"
#include "qemu/error-report.h"
#include "sysemu/cpus.h"
@@ -2658,7 +2660,8 @@ int qemu_load_device_state(QEMUFile *f)
return 0;
}
-bool save_snapshot(const char *name, bool overwrite, Error **errp)
+bool save_snapshot(const char *name, bool overwrite, const char *vmstate,
+ bool has_devices, strList *devices, Error **errp)
{
BlockDriverState *bs;
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
@@ -2680,18 +2683,19 @@ bool save_snapshot(const char *name, bool overwrite, Error **errp)
return false;
}
- if (!bdrv_all_can_snapshot(false, NULL, errp)) {
+ if (!bdrv_all_can_snapshot(has_devices, devices, errp)) {
return false;
}
/* Delete old snapshots of the same name */
if (name) {
if (overwrite) {
- if (bdrv_all_delete_snapshot(name, false, NULL, errp) < 0) {
+ if (bdrv_all_delete_snapshot(name, has_devices,
+ devices, errp) < 0) {
return false;
}
} else {
- ret2 = bdrv_all_has_snapshot(name, false, NULL, errp);
+ ret2 = bdrv_all_has_snapshot(name, has_devices, devices, errp);
if (ret2 < 0) {
return false;
}
@@ -2704,7 +2708,7 @@ bool save_snapshot(const char *name, bool overwrite, Error **errp)
}
}
- bs = bdrv_all_find_vmstate_bs(NULL, false, NULL, errp);
+ bs = bdrv_all_find_vmstate_bs(vmstate, has_devices, devices, errp);
if (bs == NULL) {
return false;
}
@@ -2775,7 +2779,8 @@ bool save_snapshot(const char *name, bool overwrite, Error **errp)
aio_context_release(aio_context);
aio_context = NULL;
- ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, false, NULL, errp);
+ ret = bdrv_all_create_snapshot(sn, bs, vm_state_size,
+ has_devices, devices, errp);
if (ret < 0) {
goto the_end;
}
@@ -2877,7 +2882,8 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp)
migration_incoming_state_destroy();
}
-bool load_snapshot(const char *name, Error **errp)
+bool load_snapshot(const char *name, const char *vmstate,
+ bool has_devices, strList *devices, Error **errp)
{
BlockDriverState *bs_vm_state;
QEMUSnapshotInfo sn;
@@ -2886,10 +2892,10 @@ bool load_snapshot(const char *name, Error **errp)
AioContext *aio_context;
MigrationIncomingState *mis = migration_incoming_get_current();
- if (!bdrv_all_can_snapshot(false, NULL, errp)) {
+ if (!bdrv_all_can_snapshot(has_devices, devices, errp)) {
return false;
}
- ret = bdrv_all_has_snapshot(name, false, NULL, errp);
+ ret = bdrv_all_has_snapshot(name, has_devices, devices, errp);
if (ret < 0) {
return false;
}
@@ -2899,7 +2905,7 @@ bool load_snapshot(const char *name, Error **errp)
return -1;
}
- bs_vm_state = bdrv_all_find_vmstate_bs(NULL, false, NULL, errp);
+ bs_vm_state = bdrv_all_find_vmstate_bs(vmstate, has_devices, devices, errp);
if (!bs_vm_state) {
return false;
}
@@ -2926,7 +2932,7 @@ bool load_snapshot(const char *name, Error **errp)
/* Flush all IO requests so they don't interfere with the new state. */
bdrv_drain_all_begin();
- ret = bdrv_all_goto_snapshot(name, false, NULL, errp);
+ ret = bdrv_all_goto_snapshot(name, has_devices, devices, errp);
if (ret < 0) {
goto err_drain;
}
@@ -1123,7 +1123,7 @@ void hmp_loadvm(Monitor *mon, const QDict *qdict)
vm_stop(RUN_STATE_RESTORE_VM);
- if (!load_snapshot(name, &err) && saved_vm_running) {
+ if (!load_snapshot(name, NULL, false, NULL, &err) && saved_vm_running) {
vm_start();
}
hmp_handle_error(mon, err);
@@ -1133,7 +1133,8 @@ void hmp_savevm(Monitor *mon, const QDict *qdict)
{
Error *err = NULL;
- save_snapshot(qdict_get_try_str(qdict, "name"), true, &err);
+ save_snapshot(qdict_get_try_str(qdict, "name"),
+ true, NULL, false, NULL, &err);
hmp_handle_error(mon, err);
}
@@ -197,7 +197,7 @@ static void replay_seek(int64_t icount, QEMUTimerCB callback, Error **errp)
if (icount < replay_get_current_icount()
|| replay_get_current_icount() < snapshot_icount) {
vm_stop(RUN_STATE_RESTORE_VM);
- load_snapshot(snapshot, errp);
+ load_snapshot(snapshot, NULL, false, NULL, errp);
}
g_free(snapshot);
}
@@ -331,7 +331,7 @@ void replay_gdb_attached(void)
*/
if (replay_mode == REPLAY_MODE_PLAY
&& !replay_snapshot) {
- if (!save_snapshot("start_debugging", true, NULL)) {
+ if (!save_snapshot("start_debugging", true, NULL, false, NULL, NULL)) {
/* Can't create the snapshot. Continue conventional debugging. */
}
}
@@ -77,13 +77,14 @@ void replay_vmstate_init(void)
if (replay_snapshot) {
if (replay_mode == REPLAY_MODE_RECORD) {
- if (!save_snapshot(replay_snapshot, true, &err)) {
+ if (!save_snapshot(replay_snapshot,
+ true, NULL, false, NULL, &err)) {
error_report_err(err);
error_report("Could not create snapshot for icount record");
exit(1);
}
} else if (replay_mode == REPLAY_MODE_PLAY) {
- if (!load_snapshot(replay_snapshot, &err)) {
+ if (!load_snapshot(replay_snapshot, NULL, false, NULL, &err)) {
error_report_err(err);
error_report("Could not load snapshot for icount replay");
exit(1);
@@ -4484,7 +4484,7 @@ void qemu_init(int argc, char **argv, char **envp)
register_global_state();
if (loadvm) {
Error *local_err = NULL;
- if (!load_snapshot(loadvm, &local_err)) {
+ if (!load_snapshot(loadvm, NULL, false, NULL, &local_err)) {
error_report_err(local_err);
autostart = 0;
exit(1);
Modify load_snapshot/save_snapshot to accept the device list and vmstate node name parameters previously added to the block layer. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- include/migration/snapshot.h | 18 ++++++++++++++++-- migration/savevm.c | 28 +++++++++++++++++----------- monitor/hmp-cmds.c | 5 +++-- replay/replay-debugging.c | 4 ++-- replay/replay-snapshot.c | 5 +++-- softmmu/vl.c | 2 +- 6 files changed, 42 insertions(+), 20 deletions(-)