docs: add some clarification to xenstore-migration.md

The Xenstore migration document is missing the specification that a
node record must be preceded by the record of its parent node in case
of live update.

Add that missing part.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>

diff --git a/docs/designs/xenstore-migration.md b/docs/designs/xenstore-migration.md
index 5f1155273ec362221b9930e8f49c52765f8702a3..b94af7fd7c45b6eb27e78ca261849a5f85302480 100644 (file)
--- a/docs/designs/xenstore-migration.md
+++ b/docs/designs/xenstore-migration.md
@@ -316,6 +316,11 @@ a _committed_ node (globally visible in xenstored) or a _pending_ node (created
 or modified by a transaction for which there is also a `TRANSACTION_DATA`
 record previously present).
 
+Each _committed_ node in the stream is required to have an already known parent
+node. A parent node is known if it was either in the node data base before the
+stream was started to be processed, or if a `NODE_DATA` record for that parent
+node has already been processed in the stream.
+
 
 ```
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