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authorJon Loeliger <jdl@netgate.com>2017-02-23 13:57:35 -0600
committerJohn Lo <loj@cisco.com>2017-03-03 23:19:21 +0000
commitc83c3b7f117b981b677f646a0e30f44ec70de239 (patch)
tree323266bab831bcbfb14f089e803b7cbc13b857e1 /src/vppinfra
parenta084d62a6e47d3505b3ed314230598704314f7bc (diff)
Implement a loopback instance allocation scheme.
To support creating loopback interfaces with a specific instance number, a new CREATE_LOOPBACK_INSTANCE API call with flag is_specified and value user_instance is introduced. Presumably the existing CREATE_LOOPBACK API message will be obsoleted and revmoved. The VAT cli commands can now mention and format the new field as 'instance %d' data. If no instance number is named, the old call CREATE_LOOPBACK is used to maintain backward compatibility. However, if the instance is named, the new CREATE_LOOPBACK_INSTANCE message will be used. Both the dynamically allocated and user-requested instance number are tracked in a bitvector. If is_specified is 0, the next free instance will be used.. A request for a specific instance number will be granted if it is available. On error, the value ~0 is returned. Change-Id: I849815563a5da736dcd6bccd262ef49b963f6643 Signed-off-by: Jon Loeliger <jdl@netgate.com>
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