c4e3043ea1
Register lcp_nl_init() which adds interface pair add/del callbacks.
lcb_nl_pair_add_cb: Initiate netlink listener for first interface in its
netns. If subsequent adds are in other netns, issue a warning. Keep
refcount.
lcb_nl_pair_del_cb: Remove listener when the last interface pair is
removed.
Socket is opened, file is added to VPP's epoll, with lcp_nl_read_cb()
and lcp_nl_error_cb() callbacks installed.
- lcp_nl_read_cb() calls lcp_nl_callback() which pushes netlink messages
onto a queue and issues NL_EVENT_READ event, any socket read error
issues NL_EVENT_READ_ERR event.
- lcp_nl_error_cb() simply issues NL_EVENT_READ_ERR event.
Then, initialize a process node called lcp_nl_process(), which handles:
- NL_EVENT_READ and call lcp_nl_process_msgs()
- if messages are left in the queue, reschedule consumption after M
msecs. This allows new netlink messages to continuously be read from
the kernel, even if we have lots of messages to consume.
- NL_EVENT_READ_ERR and close/reopens the netlink socket.
lcp_nl_process_msgs() processes up to N messages and/or for up to M
msecs, whichever comes first. For each, calling lcp_nl_dispatch().
lcp_nl_dispatch() ultimately just throws the message away after
logging it with format_nl_object()
71 lines
1.5 KiB
CMake
71 lines
1.5 KiB
CMake
# Copyright (c) 2020 Cisco and/or its affiliates.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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vpp_find_path(LIBNL3_INCLUDE_DIR NAMES libnl3/netlink/route/link/vlan.h)
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if (NOT LIBNL3_INCLUDE_DIR)
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message(WARNING "-- libnl3 headers not found - lcpng plugin disabled")
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return()
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endif()
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vpp_plugin_find_library(lcpng LIBNL3_LIB libnl-3.so)
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vpp_plugin_find_library(lcpng LIBNL3_ROUTE_LIB libnl-route-3.so.200)
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include_directories(${LIBNL3_INCLUDE_DIR}/libnl3)
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include_directories(${LIBMNL_INCLUDE_DIR})
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add_vpp_library(lcpng
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SOURCES
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lcpng_interface.c
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lcpng_adj.c
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lcpng_if_sync.c
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lcpng.c
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LINK_LIBRARIES
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${LIBNL3_LIB}
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${LIBNL3_ROUTE_LIB}
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INSTALL_HEADERS
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lcpng_interface.h
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lcpng.h
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)
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add_vpp_plugin(lcpng_if
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SOURCES
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lcpng_if_api.c
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lcpng_if_cli.c
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lcpng_if_node.c
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API_FILES
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lcpng_if.api
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LINK_LIBRARIES
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lcpng
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)
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add_vpp_plugin(lcpng_nl
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SOURCES
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lcpng_netlink.c
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LINK_LIBRARIES
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lcpng
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)
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add_vpp_plugin(lcpng_unittest
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SOURCES
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test/lcpng_unittest.c
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LINK_LIBRARIES
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lcpng
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)
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