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savevm-async: set SAVE_STATE_DONE when closing state file was successful

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Without this change, it's necessary to send a second savevm-end QMP
command after aborting a snaphsot, before a new savevm-start QMP
command can succeed.

In process_savevm_finalize(), no longer set an error in the abort
scenario. If there already is another error, there's no need to
override it. If canceling was done intentionally, qmp_savevm_end()
is responsible for setting the state now.

Reported-by: Mira Limbeck <m.limbeck@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
This commit is contained in:
Fiona Ebner 2022-08-18 13:44:17 +02:00 committed by Wolfgang Bumiller
parent 563c592898
commit 1976ca4607
3 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
debian/patches/pve/0016-PVE-add-savevm-async-for-background-state-snapshots.patch vendored
View File

@ -31,13 +31,13 @@ Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
include/migration/snapshot.h | 2 +
include/monitor/hmp.h | 5 +
migration/meson.build | 1 +
migration/savevm-async.c | 596 +++++++++++++++++++++++++++++++++++
migration/savevm-async.c | 604 +++++++++++++++++++++++++++++++++++
monitor/hmp-cmds.c | 57 ++++
qapi/migration.json | 34 ++
qapi/misc.json | 32 ++
qemu-options.hx | 12 +
softmmu/vl.c | 10 +
11 files changed, 795 insertions(+)
11 files changed, 803 insertions(+)
create mode 100644 migration/savevm-async.c
diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
@ -153,10 +153,10 @@ index 8b5ca5c047..1e2aec8486 100644
), gnutls)
diff --git a/migration/savevm-async.c b/migration/savevm-async.c
new file mode 100644
index 0000000000..88215cdb70
index 0000000000..b9a43c56bc
--- /dev/null
+++ b/migration/savevm-async.c
@@ -0,0 +1,596 @@
@@ -0,0 +1,604 @@
+#include "qemu/osdep.h"
+#include "migration/migration.h"
+#include "migration/savevm.h"
@ -422,8 +422,11 @@ index 0000000000..88215cdb70
+ } else if (snap_state.state == SAVE_STATE_ACTIVE) {
+ snap_state.state = SAVE_STATE_COMPLETED;
+ } else if (aborted) {
+ save_snapshot_error("process_savevm_cleanup: found aborted state: %d",
+ snap_state.state);
+ /*
+ * If there was an error, there's no need to set a new one here.
+ * If the snapshot was canceled, leave setting the state to
+ * qmp_savevm_end(), which is waked by save_snapshot_cleanup().
+ */
+ } else {
+ save_snapshot_error("process_savevm_cleanup: invalid state: %d",
+ snap_state.state);
@ -664,6 +667,11 @@ index 0000000000..88215cdb70
+ return;
+ }
+
+ // File closed and no other error, so ensure next snapshot can be started.
+ if (snap_state.state != SAVE_STATE_ERROR) {
+ snap_state.state = SAVE_STATE_DONE;
+ }
+
+ DPRINTF("savevm-end: cleanup done\n");
+}
+

6
debian/patches/pve/0017-PVE-add-optional-buffer-size-to-QEMUFile.patch vendored
View File

@ -165,10 +165,10 @@ index 3f36d4dc8c..67501fd9cf 100644
int qemu_get_fd(QEMUFile *f);
int qemu_fclose(QEMUFile *f);
diff --git a/migration/savevm-async.c b/migration/savevm-async.c
index 88215cdb70..615a4484c8 100644
index b9a43c56bc..0bc5799cf8 100644
--- a/migration/savevm-async.c
+++ b/migration/savevm-async.c
@@ -417,7 +417,7 @@ void qmp_savevm_start(bool has_statefile, const char *statefile, Error **errp)
@@ -420,7 +420,7 @@ void qmp_savevm_start(bool has_statefile, const char *statefile, Error **errp)
goto restart;
}
@ -177,7 +177,7 @@ index 88215cdb70..615a4484c8 100644
if (!snap_state.file) {
error_set(errp, ERROR_CLASS_GENERIC_ERROR, "failed to open '%s'", statefile);
@@ -565,7 +565,7 @@ int load_snapshot_from_blockdev(const char *filename, Error **errp)
@@ -573,7 +573,7 @@ int load_snapshot_from_blockdev(const char *filename, Error **errp)
blk_op_block_all(be, blocker);
/* restore the VM state */

4
debian/patches/pve/0049-PVE-savevm-async-register-yank-before-migration_inco.patch vendored
View File

@ -11,7 +11,7 @@ Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
1 file changed, 5 insertions(+)
diff --git a/migration/savevm-async.c b/migration/savevm-async.c
index 615a4484c8..161b4b9985 100644
index 0bc5799cf8..10ebefef06 100644
--- a/migration/savevm-async.c
+++ b/migration/savevm-async.c
@@ -19,6 +19,7 @@
@ -22,7 +22,7 @@ index 615a4484c8..161b4b9985 100644
/* #define DEBUG_SAVEVM_STATE */
@@ -578,6 +579,10 @@ int load_snapshot_from_blockdev(const char *filename, Error **errp)
@@ -586,6 +587,10 @@ int load_snapshot_from_blockdev(const char *filename, Error **errp)
dirty_bitmap_mig_before_vm_start();
qemu_fclose(f);