migration: add "exists" info to load-state-field trace

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Fiona Ebner <f.ebner@proxmox.com>
Tested-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>

diff --git a/migration/trace-events b/migration/trace-events
index d0c44c385369b9f88b8a3e2399eecf2d94eb7788..0b7c3324fb5e81821e4c732575d96ef8a8ef8d7c 100644 (file)
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -58,7 +58,7 @@ postcopy_page_req_sync(void *host_addr) "sync page req %p"
 vmstate_load_field_error(const char *field, int ret) "field \"%s\" load failed, ret = %d"
 vmstate_load_state(const char *name, int version_id) "%s v%d"
 vmstate_load_state_end(const char *name, const char *reason, int val) "%s %s/%d"
-vmstate_load_state_field(const char *name, const char *field) "%s:%s"
+vmstate_load_state_field(const char *name, const char *field, bool exists) "%s:%s exists=%d"
 vmstate_n_elems(const char *name, int n_elems) "%s: %d"
 vmstate_subsection_load(const char *parent) "%s"
 vmstate_subsection_load_bad(const char *parent,  const char *sub, const char *sub2) "%s: %s/%s"

diff --git a/migration/vmstate.c b/migration/vmstate.c
index ef26f26ccdca2339a562edc9773b849b68919064..b51212a75b055407256927806a48da6b4a52663b 100644 (file)
--- a/migration/vmstate.c
+++ b/migration/vmstate.c
@@ -128,8 +128,9 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
         }
     }
     while (field->name) {
-        trace_vmstate_load_state_field(vmsd->name, field->name);
-        if (vmstate_field_exists(vmsd, field, opaque, version_id)) {
+        bool exists = vmstate_field_exists(vmsd, field, opaque, version_id);
+        trace_vmstate_load_state_field(vmsd->name, field->name, exists);
+        if (exists) {
             void *first_elem = opaque + field->offset;
             int i, n_elems = vmstate_n_elems(opaque, field);
             int size = vmstate_size(opaque, field);