Currently, bpftool net only supports dumping progs loaded on the
interface. To load XDP prog on interface, user must use other tool
(eg. iproute2). By this patch, with `bpftool net (un)load`, user can
(un)load XDP prog on interface.
$ ./bpftool prog
...
208: xdp name xdp_prog1 tag ad822e38b629553f gpl
loaded_at 2019-07-28T18:03:11+0900 uid 0
...
$ ./bpftool net load id 208 xdpdrv enp6s0np1
$ ./bpftool net
xdp:
enp6s0np1(5) driver id 208
...
$ ./bpftool net unload xdpdrv enp6s0np1
$ ./bpftool net
xdp:
...
The word 'load' is used instead of 'attach', since XDP program is not
considered as 'bpf_attach_type' and can't be attached with
'BPF_PROG_ATTACH'. In this context, the meaning of 'load' is, prog will
be loaded on interface.
While this patch only contains support for XDP, through `net (un)load`,
bpftool can further support other prog attach types.
XDP (un)load tested on Netronome Agilio.
Daniel T. Lee (2):
tools: bpftool: add net load command to load XDP on interface
tools: bpftool: add net unload command to unload XDP on interface
tools/bpf/bpftool/net.c | 160 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 159 insertions(+), 1 deletion(-)
--
2.20.1
