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3416b00988
We need to support systems where there are hundereds of thousand routes (e.g. BGP software). For that, we will ignore routes that have a rtm_protocol value which was certainly not created by NetworkManager. Before we had a BPF filer to filter them out, but that had issues and is removed for now. Still, don't put those routes in the platform cache and ignore them early. Note that we still deserialize the RTM_NEWROUTE message to a NMPObject, and don't shortcut earlier. The reason is that we should still call delayed_action_refresh_all_in_progress() and handle the RTM_GETROUTE response, even if the route has a different protocol. So we error out later, shortly before putting the object in the cache. This means we will malloc() a NMPObject and initialize it, but that is probably cheap, compared to the first problem that the process already had to wake up and read the netlink socket. This restores the effective behavior of the BPF filter, albeit with a higher overhead, as the route is rejected later. The important part for now is that we stick to the behavior of not caching certain routes of a certain protocol. If that can in the future be optimized (e.g. by a new BPF filter), then we should do that. But for now that would be only a future performance improvement, which requires new profiling first and that has not the highest priority. Note that not caching certain routes already should reduce the largest part of the overhead that those routes brings. Whether this form is sufficient to reach the expected performance goals, needs to be measured in the future. |
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| .. | ||
| c-list | ||
| c-rbtree | ||
| c-siphash | ||
| c-stdaux | ||
| contrib | ||
| core | ||
| libnm-base | ||
| libnm-client-aux-extern | ||
| libnm-client-impl | ||
| libnm-client-public | ||
| libnm-client-test | ||
| libnm-core-aux-extern | ||
| libnm-core-aux-intern | ||
| libnm-core-impl | ||
| libnm-core-intern | ||
| libnm-core-public | ||
| libnm-glib-aux | ||
| libnm-log-core | ||
| libnm-log-null | ||
| libnm-platform | ||
| libnm-std-aux | ||
| libnm-systemd-core | ||
| libnm-systemd-shared | ||
| libnm-udev-aux | ||
| libnmc-base | ||
| libnmc-setting | ||
| libnmt-newt | ||
| linux-headers | ||
| n-acd | ||
| n-dhcp4 | ||
| nm-cloud-setup | ||
| nm-daemon-helper | ||
| nm-dispatcher | ||
| nm-initrd-generator | ||
| nm-online | ||
| nm-priv-helper | ||
| nmcli | ||
| nmtui | ||
| tests | ||
| meson.build | ||
| README.md | ||
src/
Most of the subdirectories are static helper libraries, which get linked into one of the final build artifacts (like libnm, nmcli or NetworkManager). Static libraries are internal API.
The only public API is libnm, which is a shared library provided client implementations.
Our own clients (like nmcli and nmtui) also use libnm, the shared library. But they also use additional static helper libraries.
The daemon statically links against a part of libnm, the part that provides connection profiles. That is libnm-core. libnm-core is thus statically linked with libnm and the daemon. It does not get linked by clients that already link with libnm (like nmtui).
Read the individual README.md files in the subdirectories for details:
| Directory | Description |
|---|---|
| core/ | the NetworkManager daemon |
| nmcli/ | nmcli application, a command line client for NetworkManager |
| nmtui/ | nmtui application, a text UI client for NetworkManager |
| nm-cloud-setup/ | service to automatically configure NetworkManager in cloud environment |
| nm-initrd-generator/ | generates NetworkManager configuration by parsing kernel command line options for dracut/initrd |
| nm-dispatcher/ | NetworkManager-dispatcher service to run user scripts |
| nm-online/ | application which checks whether NetworkManager is done, for implementing NetworkManager-wait-online.service |
| nm-priv-helper/ | internal service for privileged operations |
| nm-daemon-helper/ | internal helper binary spawned by NetworkManager |
| libnm-std-aux/ | internal helper library for standard C |
| libnm-glib-aux/ | internal helper library for glib |
| libnm-log-null/ | internal helper library with dummy (null) logging backend |
| libnm-log-core/ | internal helper library with logging backend (syslog) used by daemon |
| libnm-base/ | internal helper library with base definitions |
| libnm-platform/ | internal helper library for netlink and other platform/kernel API |
| libnm-udev-aux/ | internal helper library for libudev |
| libnm-core-public/ | public API of libnm (libnm-core part) |
| libnm-core-intern/ | internal API of libnm-core, used by libnm and daemon |
| libnm-core-impl/ | implementation of libnm-core |
| libnm-core-aux-intern/ | internal helper library on top of libnm-core (used by libnm-core itself) |
| libnm-core-aux-extern/ | internal helper library on top of libnm-core (not used by libnm-core) |
| libnm-client-public/ | public API of libnm (NMClient part) |
| libnm-client-impl/ | implementation of libnm (NMClient) |
| libnm-client-aux-extern/ | internal helper library on top of libnm (not used by libnm itself) |
| libnmc-base/ | internal helper library for libnm clients |
| libnmc-setting/ | internal helper library for setting connection profiles (used by nmcli) |
| libnmt-newt/ | internal helper library for libnewt for nmtui |
| linux-headers/ | extra Linux kernel UAPI headers |
| contrib/ | sources that are not used by NetworkManager itself |
| tests/ | unit tests that are not specific to one of the other directories |
| libnm-client-test/ | internal helper library with test utils for libnm |
| c-list/ | fork of c-util helper library for intrusive, doubly linked list |
| c-rbtree/ | fork of c-util helper library for intrusive Red-Black Tree |
| c-siphash/ | fork of c-util helper library for SIPHash24 |
| c-stdaux/ | fork of c-util general purpose helpers for standard C |
| n-acd/ | fork of nettools IPv4 ACD library |
| n-dhcp4/ | fork of nettools DHCPv4 library |
| libnm-systemd-core/ | fork of systemd code as network library |
| libnm-systemd-shared/ | fork of systemd code as general purpose library |