#
c344eff9 |
|
16-Jun-2023 |
Alexander V. Chernikov <melifaro@FreeBSD.org> |
netlink: dump interface capabilities with other interface data. This change exports interface capabilities using the standard Netlink attribute type, bitset, and switches `ifconfig(8)` to use it when displaying interface data. Bitset comes in two representations. The first one is "compact", where the bits are exported via two arrays - "mask" listing the "valid" bits and "values, providing the values for those bits. The second one is more verbose, listing each bit as a separate item, with its name, id and value. The latter option is handy when submitting update requests. The support for setting capabilities will be added in the upcoming diffs. Differential Revision: https://reviews.freebsd.org/D40331
|
#
7e5bf684 |
|
20-Jan-2022 |
Alexander V. Chernikov <melifaro@FreeBSD.org> |
netlink: add netlink support Netlinks is a communication protocol currently used in Linux kernel to modify, read and subscribe for nearly all networking state. Interfaces, addresses, routes, firewall, fibs, vnets, etc are controlled via netlink. It is async, TLV-based protocol, providing 1-1 and 1-many communications. The current implementation supports the subset of NETLINK_ROUTE family. To be more specific, the following is supported: * Dumps: - routes - nexthops / nexthop groups - interfaces - interface addresses - neighbors (arp/ndp) * Notifications: - interface arrival/departure - interface address arrival/departure - route addition/deletion * Modifications: - adding/deleting routes - adding/deleting nexthops/nexthops groups - adding/deleting neghbors - adding/deleting interfaces (basic support only) * Rtsock interaction - route events are bridged both ways The implementation also supports the NETLINK_GENERIC family framework. Implementation notes: Netlink is implemented via loadable/unloadable kernel module, not touching many kernel parts. Each netlink socket uses dedicated taskqueue to support async operations that can sleep, such as interface creation. All message processing is performed within these taskqueues. Compatibility: Most of the Netlink data models specified above maps to FreeBSD concepts nicely. Unmodified ip(8) binary correctly works with interfaces, addresses, routes, nexthops and nexthop groups. Some software such as net/bird require header-only modifications to compile and work with FreeBSD netlink. Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D36002 MFC after: 2 months
|