kernel_optimize_test/net/xdp
Björn Töpel cee271678d xsk: do not call synchronize_net() under RCU read lock
The XSKMAP update and delete functions called synchronize_net(), which
can sleep. It is not allowed to sleep during an RCU read section.

Instead we need to make sure that the sock sk_destruct (xsk_destruct)
function is asynchronously called after an RCU grace period. Setting
the SOCK_RCU_FREE flag for XDP sockets takes care of this.

Fixes: fbfc504a24 ("bpf: introduce new bpf AF_XDP map type BPF_MAP_TYPE_XSKMAP")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-10-11 10:19:01 +02:00
..
Kconfig
Makefile
xdp_umem_props.h
xdp_umem.c xsk: fix return value of xdp_umem_assign_dev() 2018-08-21 22:06:53 +02:00
xdp_umem.h
xsk_queue.c
xsk_queue.h
xsk.c xsk: do not call synchronize_net() under RCU read lock 2018-10-11 10:19:01 +02:00