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authorJesper Dangaard Brouer <brouer@redhat.com>2018-01-03 13:25:13 +0300
committerAlexei Starovoitov <ast@kernel.org>2018-01-06 02:21:20 +0300
commitaecd67b60722dd24353b0bc50e78a55b30707dcd (patch)
treed9c107a5ab64864470ab7d2173340cc428cd562c /net/core/Makefile
parent5f103c5d4dbadec0f2cacd39b6429e1b8a8cf983 (diff)
downloadlinux-aecd67b60722dd24353b0bc50e78a55b30707dcd.tar.xz
xdp: base API for new XDP rx-queue info concept
This patch only introduce the core data structures and API functions. All XDP enabled drivers must use the API before this info can used. There is a need for XDP to know more about the RX-queue a given XDP frames have arrived on. For both the XDP bpf-prog and kernel side. Instead of extending xdp_buff each time new info is needed, the patch creates a separate read-mostly struct xdp_rxq_info, that contains this info. We stress this data/cache-line is for read-only info. This is NOT for dynamic per packet info, use the data_meta for such use-cases. The performance advantage is this info can be setup at RX-ring init time, instead of updating N-members in xdp_buff. A possible (driver level) micro optimization is that xdp_buff->rxq assignment could be done once per XDP/NAPI loop. The extra pointer deref only happens for program needing access to this info (thus, no slowdown to existing use-cases). Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/core/Makefile')
-rw-r--r--net/core/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/Makefile b/net/core/Makefile
index 1fd0a9c88b1b..6dbbba8c57ae 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -11,7 +11,7 @@ obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
obj-y += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \
neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
sock_diag.o dev_ioctl.o tso.o sock_reuseport.o \
- fib_notifier.o
+ fib_notifier.o xdp.o
obj-y += net-sysfs.o
obj-$(CONFIG_PROC_FS) += net-procfs.o