mainline inclusion
from mainline-5.14-rc1
commit 79a7f8bd
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=79a7f8bdb159d9914b58740f3d31d602a6e4aca8

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Add placeholders for bpf_sys_bpf() helper and new program type.
Make sure to check that expected_attach_type is zero for future extensibility.
Allow tracing helper functions to be used in this program type, since they will
only execute from user context via bpf_prog_test_run.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Acked-by: NJohn Fastabend <john.fastabend@gmail.com>
Acked-by: NAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210514003623.28033-2-alexei.starovoitov@gmail.com
(cherry picked from commit 79a7f8bd)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>

Conflicts:
	include/linux/bpf_types.h
	include/uapi/linux/bpf.h
	tools/include/uapi/linux/bpf.h
Signed-off-by: NWang Yufen <wangyufen@huawei.com>