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authorBjörn Töpel <bjorn.topel@intel.com>2018-05-02 14:01:28 +0300
committerAlexei Starovoitov <ast@kernel.org>2018-05-04 01:55:24 +0300
commitfbfc504a24f53f7ebe128ab55cb5dba634f4ece8 (patch)
treed88b2d04cf60d5b77a5d794a3e0b006738c47e77 /drivers/atm
parentc497176cb2e478f0a5713b0e05f242276e3194b5 (diff)
downloadlinux-fbfc504a24f53f7ebe128ab55cb5dba634f4ece8.tar.xz
bpf: introduce new bpf AF_XDP map type BPF_MAP_TYPE_XSKMAP
The xskmap is yet another BPF map, very much inspired by dev/cpu/sockmap, and is a holder of AF_XDP sockets. A user application adds AF_XDP sockets into the map, and by using the bpf_redirect_map helper, an XDP program can redirect XDP frames to an AF_XDP socket. Note that a socket that is bound to certain ifindex/queue index will *only* accept XDP frames from that netdev/queue index. If an XDP program tries to redirect from a netdev/queue index other than what the socket is bound to, the frame will not be received on the socket. A socket can reside in multiple maps. v3: Fixed race and simplified code. v2: Removed one indirection in map lookup. Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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