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xdp: add HW offload mode flag for installing programs

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Add an installation-time flag for requesting that the program
be installed only if it can be offloaded to HW.

Internally new command for ndo_xdp is added, this way we avoid
putting checks into drivers since they all return -EINVAL on
an unknown command.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2017-06-21 18:25:04 -07:00
committed by David S. Miller
parent 32d602771b
commit ee5d032f7d
4 changed files with 13 additions and 6 deletions
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7
include/uapi/linux/if_link.h
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@@ -891,9 +891,12 @@ enum {
#define XDP_FLAGS_UPDATE_IF_NOEXIST (1U << 0)
#define XDP_FLAGS_SKB_MODE (1U << 1)
#define XDP_FLAGS_DRV_MODE (1U << 2)
#define XDP_FLAGS_HW_MODE (1U << 3)
#define XDP_FLAGS_MODES (XDP_FLAGS_SKB_MODE | \
XDP_FLAGS_DRV_MODE | \
XDP_FLAGS_HW_MODE)
#define XDP_FLAGS_MASK (XDP_FLAGS_UPDATE_IF_NOEXIST | \
XDP_FLAGS_SKB_MODE | \
XDP_FLAGS_DRV_MODE)
XDP_FLAGS_MODES)
/* These are stored into IFLA_XDP_ATTACHED on dump. */
enum {