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From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: David Ahern <dsahern@gmail.com>, Andrii Nakryiko <andriin@fb.com>,
	bpf <bpf@vger.kernel.org>, Networking <netdev@vger.kernel.org>,
	"Alexei Starovoitov" <ast@fb.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Kernel Team <Kernel-team@fb.com>, Jiri Benc <jbenc@redhat.com>
Subject: Re: [PATCH v3 bpf-next 5/7] libbpf: move bpf_{helpers,endian,tracing}.h into libbpf
Date: Fri, 4 Oct 2019 14:04:35 -0700	[thread overview]
Message-ID: <20191004140435.1b84fc68@cakuba.hsd1.ca.comcast.net> (raw)
In-Reply-To: <62b1bc6b-8c8a-b766-6bfc-2fb16017d591@fb.com>

On Fri, 4 Oct 2019 18:37:44 +0000, Yonghong Song wrote:
> > Having a header which works today, but may not work tomorrow is going
> > to be pretty bad user experience :( No matter how many warnings you put
> > in the source people will get caught off guard by this :(
> > 
> > If you define the current state as "users can use all features of
> > libbpf and nothing should break on libbpf update" (which is in my
> > understanding a goal of the project, we bent over backwards trying
> > to not break things) then adding this header will in fact make things
> > worse. The statement in quotes would no longer be true, no?  
> 
> distro can package bpf/btf uapi headers into libbpf package.
> Users linking with libbpf.a/libbpf.so can use bpf/btf.h with include
> path pointing to libbpf dev package include directory.
> Could this work?

IMHO that'd be the first thing to try.

Andrii, your option (c) also seems to me like a pretty natural fit,
although it'd be a little strange to have code depending on the kernel
version in tree :S

  reply	other threads:[~2019-10-04 21:04 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-03 21:28 [PATCH v3 bpf-next 0/7] Move bpf_helpers and add BPF_CORE_READ macros Andrii Nakryiko
2019-10-03 21:28 ` [PATCH v3 bpf-next 1/7] selftests/bpf: undo GCC-specific bpf_helpers.h changes Andrii Nakryiko
2019-10-04  7:00   ` Toke Høiland-Jørgensen
2019-10-03 21:28 ` [PATCH v3 bpf-next 2/7] selftests/bpf: samples/bpf: split off legacy stuff from bpf_helpers.h Andrii Nakryiko
2019-10-04  7:00   ` Toke Høiland-Jørgensen
2019-10-03 21:28 ` [PATCH v3 bpf-next 3/7] selftests/bpf: adjust CO-RE reloc tests for new bpf_core_read() macro Andrii Nakryiko
2019-10-03 21:28 ` [PATCH v3 bpf-next 4/7] selftests/bpf: split off tracing-only helpers into bpf_tracing.h Andrii Nakryiko
2019-10-04  7:01   ` Toke Høiland-Jørgensen
2019-10-03 21:28 ` [PATCH v3 bpf-next 5/7] libbpf: move bpf_{helpers,endian,tracing}.h into libbpf Andrii Nakryiko
2019-10-04  7:01   ` Toke Høiland-Jørgensen
2019-10-04 14:47   ` David Ahern
2019-10-04 15:27     ` Andrii Nakryiko
2019-10-04 15:44       ` David Ahern
2019-10-04 16:00         ` Andrii Nakryiko
2019-10-04 18:30           ` Jakub Kicinski
2019-10-04 18:37             ` Yonghong Song
2019-10-04 21:04               ` Jakub Kicinski [this message]
2019-10-08 15:37               ` Jiri Benc
2019-10-08 18:02                 ` Andrii Nakryiko
2019-10-04 20:21             ` Andrii Nakryiko
2019-10-04 21:06               ` Daniel Borkmann
2019-10-04 21:58                 ` Daniel Borkmann
2019-10-04 22:47                   ` Andrii Nakryiko
2019-10-04 22:51                     ` Andrii Nakryiko
2019-10-04 23:25                       ` Andrii Nakryiko
2019-10-08 15:29             ` Jiri Benc
2019-10-03 21:28 ` [PATCH v3 bpf-next 6/7] libbpf: add BPF_CORE_READ/BPF_CORE_READ_INTO helpers Andrii Nakryiko
2019-10-03 21:28 ` [PATCH v3 bpf-next 7/7] selftests/bpf: add BPF_CORE_READ and BPF_CORE_READ_STR_INTO macro tests Andrii Nakryiko

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