Messages in this thread | | | From | Song Liu <> | Subject | Re: [PATCH v4 bpf-next 2/5] bpf: assign ID to vmlinux BTF and return extra info for BTF in GET_OBJ_INFO | Date | Tue, 10 Nov 2020 20:24:32 +0000 |
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> On Nov 9, 2020, at 5:19 PM, Andrii Nakryiko <andrii@kernel.org> wrote: > > Allocate ID for vmlinux BTF. This makes it visible when iterating over all BTF > objects in the system. To allow distinguishing vmlinux BTF (and later kernel > module BTF) from user-provided BTFs, expose extra kernel_btf flag, as well as > BTF name ("vmlinux" for vmlinux BTF, will equal to module's name for module > BTF). We might want to later allow specifying BTF name for user-provided BTFs > as well, if that makes sense. But currently this is reserved only for > in-kernel BTFs. > > Having in-kernel BTFs exposed IDs will allow to extend BPF APIs that require > in-kernel BTF type with ability to specify BTF types from kernel modules, not > just vmlinux BTF. This will be implemented in a follow up patch set for > fentry/fexit/fmod_ret/lsm/etc. > > Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
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