Yonghong Song 3c32cc1bce bpf: Enable bpf_iter targets registering ctx argument types ... Commit b121b341e5 ("bpf: Add PTR_TO_BTF_ID_OR_NULL support") adds a field btf_id_or_null_non0_off to bpf_prog->aux structure to indicate that the first ctx argument is PTR_TO_BTF_ID reg_type and all others are PTR_TO_BTF_ID_OR_NULL. This approach does not really scale if we have other different reg types in the future, e.g., a pointer to a buffer. This patch enables bpf_iter targets registering ctx argument reg types which may be different from the default one. For example, for pointers to structures, the default reg_type is PTR_TO_BTF_ID for tracing program. The target can register a particular pointer type as PTR_TO_BTF_ID_OR_NULL which can be used by the verifier to enforce accesses. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200513180221.2949882-1-yhs@fb.com		2020-05-13 12:30:50 -07:00
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af_netlink.c	bpf: Enable bpf_iter targets registering ctx argument types	2020-05-13 12:30:50 -07:00
af_netlink.h	netlink: Add new socket option to enable strict checking on dumps	2018-10-08 10:39:04 -07:00
diag.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
genetlink.c	netlink: add infrastructure to expose policies to userspace	2020-04-30 17:51:42 -07:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	netlink: add infrastructure to expose policies to userspace	2020-04-30 17:51:42 -07:00
policy.c	netlink: add infrastructure to expose policies to userspace	2020-04-30 17:51:42 -07:00