This change makes it possible to delete rules after inserting them, without needing to query the rules first. Additionally, this allows positioning a new rule next to an existing rule. There are two ways to refer to a rule: Either by ID or by handle. The ID is assigned by userspace, and is only valid within a transaction, so it can only be used before the flush. The handle is assigned by the kernel when the transaction is committed, and can thus only be used after the flush. We thus need to set an ID on each newly created rule, and retrieve the handle of the rule during the flush. I extended the message struct with a pointer to the Rule which the message creates. This allows calling the reply handler callback which sets the handle. I updated tests to add a handle to generated replies for the NFT_MSG_NEWRULE messages. |
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nftest.go | ||
system_conn.go |