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Ben Pfaff authored
OVSDB has always had the ability to mark a column as "immutable", so that its value cannot be changed in a given row after that row is initially inserted. However, we discovered recently that ovsdb-server has never enforced this constraint. This commit implements enforcement. Reported-by: Paul Ingram <paul@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com> Acked-by: Kyle Mestery <kmestery@cisco.com>
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