diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2016-11-29 01:16:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-30 18:27:20 +0300 |
| commit | 85de8576a0b14aecc99136cfbf90e367fa2142cb (patch) | |
| tree | 30b716ce4c318a241ef2456bf2ed1be29991bcab /include/uapi | |
| parent | 0f29f05bd7064bdf0c9629511bcba7650ce364d5 (diff) | |
| download | linux-85de8576a0b14aecc99136cfbf90e367fa2142cb.tar.xz | |
bpf, xdp: allow to pass flags to dev_change_xdp_fd
Add an IFLA_XDP_FLAGS attribute that can be passed for setting up
XDP along with IFLA_XDP_FD, which eventually allows user space to
implement typical add/replace/delete logic for programs. Right now,
calling into dev_change_xdp_fd() will always replace previous programs.
When passed XDP_FLAGS_UPDATE_IF_NOEXIST, we can handle this more
graceful when requested by returning -EBUSY in case we try to
attach a new program, but we find that another one is already
attached. This will be used by upcoming front-end for iproute2 as
well.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/if_link.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 92b2d4928bf1..6b13e591abc9 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -876,10 +876,14 @@ enum { /* XDP section */ +#define XDP_FLAGS_UPDATE_IF_NOEXIST (1U << 0) +#define XDP_FLAGS_MASK (XDP_FLAGS_UPDATE_IF_NOEXIST) + enum { IFLA_XDP_UNSPEC, IFLA_XDP_FD, IFLA_XDP_ATTACHED, + IFLA_XDP_FLAGS, __IFLA_XDP_MAX, }; |