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authorJon Loeliger <jdl@netgate.com>2020-10-15 14:41:36 -0400
committerDamjan Marion <dmarion@me.com>2020-12-15 15:14:05 +0000
commit5c1e48c01b50ddbd7623228e3dbc94d835d23813 (patch)
treec38d75e9f471b5dbee8968230c5f0bf538f2d53e /MAINTAINERS
parent510aaa8911843206f7b9ff48b41e3c7b8c4a99fe (diff)
classify: add pcap/trace classfier mgmt API calls
Add lookup/get/set API calls to manage both PCAP and Trace filtering Classifier tables. The "lookup" call may be used to identify a Classifier table within a chain of tables taht matches a particular mask vector. For efficiency, this call should be used to determine to which table a match vector should be added. The "get" calls return the first table within a chain (either a PCAP or the Trace) set of tables. The "set" call may be used to add a new table to one such chain. If the "sort_masks" flag is set, the tables within the chain are ordered such that the most-specific mask is first, and the least-specific mask is last. A call that "sets" a chain to ~0 will delete and free all the tables with a chain. The PCAP filters are per-interface, with "local0", (that is, sw_if_index == 0) holding the system-wide PCAP filter. The Classifier used a reference-counted "set" for each PCAP or trace filter that it stored. The ref counts were not used, and the vector of tables was only used temporarily to establish a sorted order for tables based on masks. None of that complexity was actually warranted, and where it was used, the same could be achieved more simply. Type: refactor Signed-off-by: Jon Loeliger <jdl@netgate.com> Change-Id: Icc56116cca91b91c631ca0628e814fb53f3677d2
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