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authorPeter Xu <peterx@redhat.com>2018-05-02 18:47:31 +0800
committerJuan Quintela <quintela@redhat.com>2018-05-15 20:56:55 +0200
commitd1b8eadbc43739992eed75912f6a065b9f299221 (patch)
treecfb3fd6f4622ead92670628c88dd535b328b0bf1 /migration/migration.c
parent13955b89ce54a85a9e88c64a196db61aa8bf0f34 (diff)
migration: introduce SaveVMHandlers.resume_prepare
This is hook function to be called when a postcopy migration wants to resume from a failure. For each module, it should provide its own recovery logic before we switch to the postcopy-active state. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180502104740.12123-16-peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration/migration.c')
-rw-r--r--migration/migration.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/migration/migration.c b/migration/migration.c
index 4f2c6d22d1..b0217c4823 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2454,7 +2454,25 @@ typedef enum MigThrError {
/* Return zero if success, or <0 for error */
static int postcopy_do_resume(MigrationState *s)
{
- /* TODO: do the resume logic */
+ int ret;
+
+ /*
+ * Call all the resume_prepare() hooks, so that modules can be
+ * ready for the migration resume.
+ */
+ ret = qemu_savevm_state_resume_prepare(s);
+ if (ret) {
+ error_report("%s: resume_prepare() failure detected: %d",
+ __func__, ret);
+ return ret;
+ }
+
+ /*
+ * TODO: handshake with dest using MIG_CMD_RESUME,
+ * MIG_RP_MSG_RESUME_ACK, then switch source state to
+ * "postcopy-active"
+ */
+
return 0;
}