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From: Yonghong Song <yhs@fb.com>
To: Hao Luo <haoluo@google.com>, <netdev@vger.kernel.org>,
	<bpf@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<linux-kselftest@vger.kernel.org>
Cc: Shuah Khan <shuah@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Andrii Nakryiko <andriin@fb.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@chromium.org>,
	Quentin Monnet <quentin@isovalent.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ingo Molnar <mingo@redhat.com>, Andrey Ignatov <rdna@fb.com>,
	Jakub Sitnicki <jakub@cloudflare.com>
Subject: Re: [PATCH bpf-next v1 2/8] bpf: Propagate BPF_PSEUDO_BTF_ID to uapi headers in /tools
Date: Thu, 20 Aug 2020 09:44:50 -0700	[thread overview]
Message-ID: <496a2a25-ad43-2f87-033b-3b462011ad08@fb.com> (raw)
In-Reply-To: <20200819224030.1615203-3-haoluo@google.com>



On 8/19/20 3:40 PM, Hao Luo wrote:
> Propagate BPF_PSEUDO_BTF_ID from include/linux/uapi/bpf.h to
> tools/include/linux/uapi/bpf.h.

This can be folded into the previous patch.

> 
> Signed-off-by: Hao Luo <haoluo@google.com>
> ---
>   tools/include/uapi/linux/bpf.h | 38 ++++++++++++++++++++++++++--------
>   1 file changed, 29 insertions(+), 9 deletions(-)
> 
> diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
> index 0480f893facd..468376f2910b 100644
> --- a/tools/include/uapi/linux/bpf.h
> +++ b/tools/include/uapi/linux/bpf.h
> @@ -346,18 +346,38 @@ enum bpf_link_type {
>   #define BPF_F_TEST_STATE_FREQ	(1U << 3)
>   
>   /* When BPF ldimm64's insn[0].src_reg != 0 then this can have
> - * two extensions:
> - *
> - * insn[0].src_reg:  BPF_PSEUDO_MAP_FD   BPF_PSEUDO_MAP_VALUE
> - * insn[0].imm:      map fd              map fd
> - * insn[1].imm:      0                   offset into value
> - * insn[0].off:      0                   0
> - * insn[1].off:      0                   0
> - * ldimm64 rewrite:  address of map      address of map[0]+offset
> - * verifier type:    CONST_PTR_TO_MAP    PTR_TO_MAP_VALUE
> + * the following extensions:
> + *
> + * insn[0].src_reg:  BPF_PSEUDO_MAP_FD
> + * insn[0].imm:      map fd
> + * insn[1].imm:      0
> + * insn[0].off:      0
> + * insn[1].off:      0
> + * ldimm64 rewrite:  address of map
> + * verifier type:    CONST_PTR_TO_MAP
>    */
>   #define BPF_PSEUDO_MAP_FD	1
> +/*
> + * insn[0].src_reg:  BPF_PSEUDO_MAP_VALUE
> + * insn[0].imm:      map fd
> + * insn[1].imm:      offset into value
> + * insn[0].off:      0
> + * insn[1].off:      0
> + * ldimm64 rewrite:  address of map[0]+offset
> + * verifier type:    PTR_TO_MAP_VALUE
> + */
>   #define BPF_PSEUDO_MAP_VALUE	2
> +/*
> + * insn[0].src_reg:  BPF_PSEUDO_BTF_ID
> + * insn[0].imm:      kernel btd id of VAR
> + * insn[1].imm:      0
> + * insn[0].off:      0
> + * insn[1].off:      0
> + * ldimm64 rewrite:  address of the kernel variable
> + * verifier type:    PTR_TO_BTF_ID or PTR_TO_MEM, depending on whether the var
> + *                   is struct/union.
> + */
> +#define BPF_PSEUDO_BTF_ID	3
>   
>   /* when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative
>    * offset to another bpf function
> 

  reply	other threads:[~2020-08-20 16:46 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-19 22:40 [PATCH bpf-next v1 0/8] bpf: BTF support for ksyms Hao Luo
2020-08-19 22:40 ` [PATCH bpf-next v1 1/8] bpf: Introduce pseudo_btf_id Hao Luo
2020-08-20 15:22   ` Yonghong Song
2020-08-20 17:04     ` Hao Luo
2020-08-25  0:05     ` Hao Luo
2020-08-25  0:43       ` Yonghong Song
2020-08-20 16:43   ` Yonghong Song
2020-08-20 21:53   ` Alexei Starovoitov
2020-08-21  2:22     ` Hao Luo
2020-08-19 22:40 ` [PATCH bpf-next v1 2/8] bpf: Propagate BPF_PSEUDO_BTF_ID to uapi headers in /tools Hao Luo
2020-08-20 16:44   ` Yonghong Song [this message]
2020-08-19 22:40 ` [PATCH bpf-next v1 3/8] bpf: Introduce help function to validate ksym's type Hao Luo
2020-08-20 17:20   ` Yonghong Song
2020-08-21 21:50     ` Andrii Nakryiko
2020-08-22  0:43       ` Hao Luo
2020-08-22  2:43         ` Andrii Nakryiko
2020-08-22  7:04           ` Hao Luo
2020-08-19 22:40 ` [PATCH bpf-next v1 4/8] bpf/libbpf: BTF support for typed ksyms Hao Luo
2020-08-21 22:37   ` Andrii Nakryiko
2020-08-27 22:29     ` Hao Luo
2020-09-01 18:11       ` Andrii Nakryiko
2020-09-01 20:35         ` Hao Luo
2020-09-01 23:54           ` Andrii Nakryiko
2020-09-02  0:46             ` Hao Luo
2020-08-19 22:40 ` [PATCH bpf-next v1 5/8] bpf/selftests: ksyms_btf to test " Hao Luo
2020-08-20 17:28   ` Yonghong Song
2020-08-21 23:03     ` Andrii Nakryiko
2020-08-22  7:26       ` Hao Luo
2020-08-22  7:35         ` Andrii Nakryiko
2020-08-19 22:40 ` [PATCH bpf-next v1 6/8] bpf: Introduce bpf_per_cpu_ptr() Hao Luo
2020-08-22  3:26   ` Andrii Nakryiko
2020-08-22  3:31     ` Andrii Nakryiko
2020-08-22  7:49       ` Hao Luo
2020-08-22  7:55         ` Andrii Nakryiko
2020-08-25  1:03           ` Hao Luo
2020-08-19 22:40 ` [PATCH bpf-next v1 7/8] bpf: Propagate bpf_per_cpu_ptr() to /tools Hao Luo
2020-08-20 17:30   ` Yonghong Song
2020-08-19 22:40 ` [PATCH bpf-next v1 8/8] bpf/selftests: Test for bpf_per_cpu_ptr() Hao Luo
2020-08-22  3:30   ` Andrii Nakryiko
2020-08-28  3:42     ` Hao Luo
2020-09-01 18:12       ` Andrii Nakryiko
2020-09-01 19:47         ` Hao Luo

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