[PATCH 03/18] Introduce qemu_loadvm_state_no_header() and make qemu_loadvm_state() a wrapper.

[OHMURA Kei <ohmura.kei@xxxxxxxxxxxxx>]

From: Yoshiaki Tamura <tamura.yoshiaki@xxxxxxxxxxxxx>

Introduce qemu_loadvm_state_no_header() so that it can be called
iteratively without reading the header, and qemu_loadvm_state()
becomes a wrapper of it.

Signed-off-by: Yoshiaki Tamura <tamura.yoshiaki@xxxxxxxxxxxxx>
Signed-off-by: OHMURA Kei <ohmura.kei@xxxxxxxxxxxxx>
---
 savevm.c |   45 +++++++++++++++++++++++++++------------------
 1 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/savevm.c b/savevm.c
index 9cf0258..d017760 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1744,30 +1744,14 @@ typedef struct LoadStateEntry {
     int version_id;
 } LoadStateEntry;
 
-int qemu_loadvm_state(QEMUFile *f)
+static int qemu_loadvm_state_no_header(QEMUFile *f)
 {
     QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
         QLIST_HEAD_INITIALIZER(loadvm_handlers);
     LoadStateEntry *le, *new_le;
     uint8_t section_type;
-    unsigned int v;
-    int ret;
-
-    if (qemu_savevm_state_blocked(default_mon)) {
-        return -EINVAL;
-    }
-
-    v = qemu_get_be32(f);
-    if (v != QEMU_VM_FILE_MAGIC)
-        return -EINVAL;
 
-    v = qemu_get_be32(f);
-    if (v == QEMU_VM_FILE_VERSION_COMPAT) {
-        fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
-        return -ENOTSUP;
-    }
-    if (v != QEMU_VM_FILE_VERSION)
-        return -ENOTSUP;
+    int ret;
 
     while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
         uint32_t instance_id, version_id, section_id;
@@ -1862,6 +1846,31 @@ out:
     return ret;
 }
 
+int qemu_loadvm_state(QEMUFile *f)
+{
+    unsigned int v;
+
+    if (qemu_savevm_state_blocked(default_mon)) {
+        return -EINVAL;
+    }
+
+    v = qemu_get_be32(f);
+    if (v != QEMU_VM_FILE_MAGIC) {
+        return -EINVAL;
+    }
+
+    v = qemu_get_be32(f);
+    if (v == QEMU_VM_FILE_VERSION_COMPAT) {
+        fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
+        return -ENOTSUP;
+    }
+    if (v != QEMU_VM_FILE_VERSION) {
+        return -ENOTSUP;
+    }
+
+    return qemu_loadvm_state_no_header(f);
+}
+
 static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
                               const char *name)
 {
-- 
1.7.0.2

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