xsk: add user memory registration support sockopt
In this commit the base structure of the AF_XDP address family is set up. Further, we introduce the abilty register a window of user memory to the kernel via the XDP_UMEM_REG setsockopt syscall. The memory window is viewed by an AF_XDP socket as a set of equally large frames. After a user memory registration all frames are "owned" by the user application, and not the kernel. v2: More robust checks on umem creation and unaccount on error. Call set_page_dirty_lock on cleanup. Simplified xdp_umem_reg. Co-authored-by: NMagnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: NMagnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: NBjörn Töpel <bjorn.topel@intel.com> Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
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include/net/xdp_sock.h
0 → 100644
include/uapi/linux/if_xdp.h
0 → 100644
net/xdp/Makefile
0 → 100644
net/xdp/xdp_umem.c
0 → 100644
net/xdp/xdp_umem.h
0 → 100644
net/xdp/xdp_umem_props.h
0 → 100644
net/xdp/xsk.c
0 → 100644
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