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migration: Add post_save function to VMStateDescription

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In some cases it may be helpful to modify state before saving it for
migration, and then modify the state back after it has been saved. The
existing pre_save function provides half of this functionality. This
patch adds a post_save function to provide the second half.

Signed-off-by: Aaron Lindsay <aclindsa@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 20181211151945.29137-2-aaron@os.amperecomputing.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Aaron Lindsay 2019-01-21 10:23:13 +00:00 • committed by Peter Maydell
parent 8733d762d5
commit 8c07559fc7
3 changed files with 20 additions and 3 deletions
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1
include/migration/vmstate.h
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@ -185,6 +185,7 @@ struct VMStateDescription {
int (*pre_load)(void *opaque);
int (*post_load)(void *opaque, int version_id);
int (*pre_save)(void *opaque);
int (*post_save)(void *opaque);
bool (*needed)(void *opaque);
const VMStateField *fields;
const VMStateDescription **subsections;