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From 0aa1a1886452bb26cc60ac482f70d0ef78b85165 Mon Sep 17 00:00:00 2001
From: Michael S. Tsirkin <mst@redhat.com>
Date: Wed, 14 May 2014 08:52:47 +0200
Subject: [PATCH 21/31] vmstate: add VMS_MUST_EXIST
RH-Author: Michael S. Tsirkin <mst@redhat.com>
Message-id: <1400057538-6975-3-git-send-email-mst@redhat.com>
Patchwork-id: 58869
O-Subject: [PATCH qemu-kvm RHEL7.1 2/5] vmstate: add VMS_MUST_EXIST
Bugzilla: 1095716
RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>
RH-Acked-by: Marcel Apfelbaum <marcel.a@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Juan Quintela <quintela@redhat.com>
Can be used to verify a required field exists or validate
state in some other way.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit 5bf81c8d63db0216a4d29dc87f9ce530bb791dd1)
---
include/migration/vmstate.h | 1 +
savevm.c | 10 ++++++++++
2 files changed, 11 insertions(+)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
include/migration/vmstate.h | 1 +
savevm.c | 10 ++++++++++
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 11d93e1..95d1ce6 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -98,6 +98,7 @@ enum VMStateFlags {
VMS_MULTIPLY = 0x200, /* multiply "size" field by field_size */
VMS_VARRAY_UINT8 = 0x400, /* Array with size in uint8_t field*/
VMS_VARRAY_UINT32 = 0x800, /* Array with size in uint32_t field*/
+ VMS_MUST_EXIST = 0x1000, /* Field must exist in input */
};
typedef struct {
diff --git a/savevm.c b/savevm.c
index 707caac..94512dd 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1764,6 +1764,10 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
return ret;
}
}
+ } else if (field->flags & VMS_MUST_EXIST) {
+ fprintf(stderr, "Input validation failed: %s/%s\n",
+ vmsd->name, field->name);
+ return -1;
}
field++;
}
@@ -1804,6 +1808,12 @@ void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
field->info->put(f, addr, size);
}
}
+ } else {
+ if (field->flags & VMS_MUST_EXIST) {
+ fprintf(stderr, "Output state validation failed: %s/%s\n",
+ vmsd->name, field->name);
+ assert(!(field->flags & VMS_MUST_EXIST));
+ }
}
field++;
}
--
1.7.1