[Qemu-devel] [PATCH v2 08/17] savevm: add error parameter to qemu_savevm_state_begin()

[Pavel Hrdina <phrdina@redhat.com>]

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
---
 migration.c | 2 +-
 savevm.c    | 7 +++++--
 sysemu.h    | 3 ++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/migration.c b/migration.c
index 73ce170..bf51a07 100644
--- a/migration.c
+++ b/migration.c
@@ -451,7 +451,7 @@ void migrate_fd_connect(MigrationState *s)
     s->file = qemu_fopen_ops_buffered(s);
 
     DPRINTF("beginning savevm\n");
-    ret = qemu_savevm_state_begin(s->file, &s->params);
+    ret = qemu_savevm_state_begin(s->file, &s->params, NULL);
     if (ret < 0) {
         DPRINTF("failed, %d\n", ret);
         migrate_fd_error(s);
diff --git a/savevm.c b/savevm.c
index 3ee7da5..633a697 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1601,7 +1601,8 @@ bool qemu_savevm_state_blocked(Error **errp)
 }
 
 int qemu_savevm_state_begin(QEMUFile *f,
-                            const MigrationParams *params)
+                            const MigrationParams *params,
+                            Error **errp)
 {
     SaveStateEntry *se;
     int ret;
@@ -1641,12 +1642,14 @@ int qemu_savevm_state_begin(QEMUFile *f,
 
         ret = se->ops->save_live_setup(f, se->opaque);
         if (ret < 0) {
+            error_setg(errp, "Failed to begin vmstate save.");
             qemu_savevm_state_cancel(f);
             return ret;
         }
     }
     ret = qemu_file_get_error(f);
     if (ret != 0) {
+        error_setg(errp, "%s", strerror(errno));
         qemu_savevm_state_cancel(f);
     }
 
@@ -1783,7 +1786,7 @@ static int qemu_savevm_state(QEMUFile *f)
         goto out;
     }
 
-    ret = qemu_savevm_state_begin(f, &params);
+    ret = qemu_savevm_state_begin(f, &params, NULL);
     if (ret < 0)
         goto out;
 
diff --git a/sysemu.h b/sysemu.h
index 1b6add2..07c5322 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -74,7 +74,8 @@ void qemu_announce_self(void);
 
 bool qemu_savevm_state_blocked(Error **errp);
 int qemu_savevm_state_begin(QEMUFile *f,
-                            const MigrationParams *params);
+                            const MigrationParams *params,
+                            Error **errp);
 int qemu_savevm_state_iterate(QEMUFile *f);
 int qemu_savevm_state_complete(QEMUFile *f);
 void qemu_savevm_state_cancel(QEMUFile *f);
-- 
1.8.0.2