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linux-next/tools/testing
John Fastabend 34f79502bb bpf: avoid preempt enable/disable in sockmap using tcp_skb_cb region
SK_SKB BPF programs are run from the socket/tcp context but early in
the stack before much of the TCP metadata is needed in tcp_skb_cb. So
we can use some unused fields to place BPF metadata needed for SK_SKB
programs when implementing the redirect function.

This allows us to drop the preempt disable logic. It does however
require an API change so sk_redirect_map() has been updated to
additionally provide ctx_ptr to skb. Note, we do however continue to
disable/enable preemption around actual BPF program running to account
for map updates.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-20 13:01:29 +01:00
..
fault-injection fault-injection: fix failcmd.sh warning 2012-07-31 18:42:38 -07:00
ktest Greg Kroah-Hartman reported to me that the ktest of v4.10 locked up in an 2017-03-08 11:06:05 -08:00
nvdimm tools/testing/nvdimm: disable labels for nfit_test.1 2017-09-18 17:19:10 -07:00
radix-tree radix tree test suite: Specify -m32 in LDFLAGS too 2017-03-07 13:18:24 -05:00
selftests bpf: avoid preempt enable/disable in sockmap using tcp_skb_cb region 2017-10-20 13:01:29 +01:00