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[PATCH v4 6/9] migration: wire up support for snapshot device selection
From: |
Daniel P . Berrangé |
Subject: |
[PATCH v4 6/9] migration: wire up support for snapshot device selection |
Date: |
Tue, 15 Sep 2020 12:35:20 +0100 |
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 | 12 ++++++++++--
migration/savevm.c | 24 ++++++++++++++----------
monitor/hmp-cmds.c | 4 ++--
replay/replay-snapshot.c | 4 ++--
softmmu/vl.c | 2 +-
5 files changed, 29 insertions(+), 17 deletions(-)
diff --git a/include/migration/snapshot.h b/include/migration/snapshot.h
index d7db1174ef..b2c72e0a1b 100644
--- a/include/migration/snapshot.h
+++ b/include/migration/snapshot.h
@@ -15,7 +15,15 @@
#ifndef QEMU_MIGRATION_SNAPSHOT_H
#define QEMU_MIGRATION_SNAPSHOT_H
-int save_snapshot(const char *name, bool overwrite, Error **errp);
-int load_snapshot(const char *name, Error **errp);
+#include "qapi/qapi-builtin-types.h"
+
+int save_snapshot(const char *name, bool overwrite,
+ const char *vmstate,
+ bool has_devices, strList *devices,
+ Error **errp);
+int load_snapshot(const char *name,
+ const char *vmstate,
+ bool has_devices, strList *devices,
+ Error **errp);
#endif
diff --git a/migration/savevm.c b/migration/savevm.c
index 2025e3e579..b3d2ce7045 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -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;
}
-int save_snapshot(const char *name, bool overwrite, Error **errp)
+int 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 +2683,18 @@ int save_snapshot(const char *name, bool overwrite,
Error **errp)
return ret;
}
- if (!bdrv_all_can_snapshot(false, NULL, errp)) {
+ if (!bdrv_all_can_snapshot(has_devices, devices, errp)) {
return ret;
}
/* Delete old snapshots of the same name */
if (name && overwrite) {
- if (bdrv_all_delete_snapshot(name, false, NULL, errp) < 0) {
+ if (bdrv_all_delete_snapshot(name, has_devices, devices, errp) < 0) {
return ret;
}
}
- 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 ret;
}
@@ -2757,7 +2760,7 @@ int 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;
}
@@ -2858,7 +2861,8 @@ void qmp_xen_load_devices_state(const char *filename,
Error **errp)
migration_incoming_state_destroy();
}
-int load_snapshot(const char *name, Error **errp)
+int load_snapshot(const char *name, const char *vmstate,
+ bool has_devices, strList *devices, Error **errp)
{
BlockDriverState *bs_vm_state;
QEMUSnapshotInfo sn;
@@ -2873,15 +2877,15 @@ int load_snapshot(const char *name, Error **errp)
return -1;
}
- if (!bdrv_all_can_snapshot(false, NULL, errp)) {
+ if (!bdrv_all_can_snapshot(has_devices, devices, errp)) {
return -1;
}
- ret = bdrv_all_find_snapshot(name, false, NULL, errp);
+ ret = bdrv_all_find_snapshot(name, has_devices, devices, errp);
if (ret < 0) {
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 -1;
}
@@ -2902,7 +2906,7 @@ int 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;
}
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index c1b8533d0c..1191aac3ae 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -1121,7 +1121,7 @@ void hmp_loadvm(Monitor *mon, const QDict *qdict)
vm_stop(RUN_STATE_RESTORE_VM);
- if (load_snapshot(name, &err) == 0 && saved_vm_running) {
+ if (load_snapshot(name, NULL, false, NULL, &err) == 0 && saved_vm_running)
{
vm_start();
}
hmp_handle_error(mon, err);
@@ -1131,7 +1131,7 @@ 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);
}
diff --git a/replay/replay-snapshot.c b/replay/replay-snapshot.c
index 8e7ff97d11..8ed09177b5 100644
--- a/replay/replay-snapshot.c
+++ b/replay/replay-snapshot.c
@@ -77,13 +77,13 @@ void replay_vmstate_init(void)
if (replay_snapshot) {
if (replay_mode == REPLAY_MODE_RECORD) {
- if (save_snapshot(replay_snapshot, true, &err) != 0) {
+ if (save_snapshot(replay_snapshot, true, NULL, false, NULL, &err)
!= 0) {
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) != 0) {
+ if (load_snapshot(replay_snapshot, NULL, false, NULL, &err) != 0) {
error_report_err(err);
error_report("Could not load snapshot for icount replay");
exit(1);
diff --git a/softmmu/vl.c b/softmmu/vl.c
index f7b103467c..820d380229 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -4459,7 +4459,7 @@ void qemu_init(int argc, char **argv, char **envp)
register_global_state();
if (loadvm) {
Error *local_err = NULL;
- if (load_snapshot(loadvm, &local_err) < 0) {
+ if (load_snapshot(loadvm, NULL, false, NULL, &local_err) < 0) {
error_report_err(local_err);
autostart = 0;
exit(1);
--
2.26.2
- [PATCH v4 0/9] migration: bring improved savevm/loadvm/delvm to QMP, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 1/9] block: push error reporting into bdrv_all_*_snapshot functions, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 2/9] migration: stop returning errno from load_snapshot(), Daniel P . Berrangé, 2020/09/15
- [PATCH v4 3/9] block: add ability to specify list of blockdevs during snapshot, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 4/9] block: allow specifying name of block device for vmstate storage, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 5/9] migration: control whether snapshots are ovewritten, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 6/9] migration: wire up support for snapshot device selection,
Daniel P . Berrangé <=
- [PATCH v4 7/9] migration: introduce a delete_snapshot wrapper, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 8/9] iotests: add support for capturing and matching QMP events, Daniel P . Berrangé, 2020/09/15
- [PATCH v4 9/9] migration: introduce snapshot-{save, load, delete} QMP commands, Daniel P . Berrangé, 2020/09/15