This work adds a BPF programmable device which can operate in L3 or L2
mode where the BPF program is part of the xmit routine. It's program
management is done via bpf_mprog and it comes with BPF link support.
For details see patch 1 and following. Thanks!
v3 -> v4:
- Moved netkit_release_all() into ndo_uninit (Stan)
- Two small commit msg corrections (Toke)
- Added Acked/Reviewed-by
v2 -> v3:
- Remove setting dev->min_mtu to ETH_MIN_MTU (Andrew)
- Do not populate ethtool info->version (Andrew)
- Populate netdev private data before register_netdevice (Andrew)
- Use strscpy for ifname template (Jakub)
- Use GFP_KERNEL_ACCOUNT for link kzalloc (Jakub)
- Carry and dump link attach type for bpftool (Toke)
v1 -> v2:
- Rename from meta (Toke, Andrii, Alexei)
- Reuse skb_scrub_packet (Stan)
- Remove IFF_META and use netdev_ops (Toke)
- Add comment to multicast handler (Toke)
- Remove silly version info (Toke)
- Fix attach_type_name (Quentin)
- Rework libbpf link attach api to be similar
as tcx (Andrii)
- Move flags last for bpf_netkit_opts (Andrii)
- Rebased to bpf_mprog query api changes
- Folded link support patch into main one
Daniel Borkmann (7):
netkit, bpf: Add bpf programmable net device
tools: Sync if_link uapi header
libbpf: Add link-based API for netkit
bpftool: Implement link show support for netkit
bpftool: Extend net dump with netkit progs
selftests/bpf: Add netlink helper library
selftests/bpf: Add selftests for netkit
MAINTAINERS | 9 +
drivers/net/Kconfig | 9 +
drivers/net/Makefile | 1 +
drivers/net/netkit.c | 940 ++++++++++++++++++
include/net/netkit.h | 38 +
include/uapi/linux/bpf.h | 14 +
include/uapi/linux/if_link.h | 24 +
kernel/bpf/syscall.c | 30 +-
.../bpf/bpftool/Documentation/bpftool-net.rst | 8 +-
tools/bpf/bpftool/link.c | 9 +
tools/bpf/bpftool/net.c | 7 +-
tools/include/uapi/linux/bpf.h | 14 +
tools/include/uapi/linux/if_link.h | 141 +++
tools/lib/bpf/bpf.c | 16 +
tools/lib/bpf/bpf.h | 5 +
tools/lib/bpf/libbpf.c | 39 +
tools/lib/bpf/libbpf.h | 15 +
tools/lib/bpf/libbpf.map | 1 +
tools/testing/selftests/bpf/Makefile | 19 +-
tools/testing/selftests/bpf/config | 1 +
tools/testing/selftests/bpf/netlink_helpers.c | 358 +++++++
tools/testing/selftests/bpf/netlink_helpers.h | 46 +
.../selftests/bpf/prog_tests/tc_helpers.h | 4 +
.../selftests/bpf/prog_tests/tc_netkit.c | 687 +++++++++++++
.../selftests/bpf/progs/test_tc_link.c | 13 +
25 files changed, 2433 insertions(+), 15 deletions(-)
create mode 100644 drivers/net/netkit.c
create mode 100644 include/net/netkit.h
create mode 100644 tools/testing/selftests/bpf/netlink_helpers.c
create mode 100644 tools/testing/selftests/bpf/netlink_helpers.h
create mode 100644 tools/testing/selftests/bpf/prog_tests/tc_netkit.c
--
2.34.1
