From: Shmulik Ladkani <shmulik.ladkani@gmail.com>
To: Joanne Koong <joannelkoong@gmail.com>
Cc: bpf@vger.kernel.org, daniel@iogearbox.net, martin.lau@kernel.org,
andrii@kernel.org, ast@kernel.org, Kernel-team@fb.com
Subject: Re: [PATCH bpf-next v1 1/8] bpf: Add bpf_dynptr_data_rdonly
Date: Fri, 9 Sep 2022 18:51:56 +0300 [thread overview]
Message-ID: <20220909185156.7e204814@blondie> (raw)
In-Reply-To: <20220908000254.3079129-2-joannelkoong@gmail.com>
On Wed, 7 Sep 2022 17:02:47 -0700 Joanne Koong <joannelkoong@gmail.com> wrote:
> Add a new helper bpf_dynptr_data_rdonly
>
> void *bpf_dynptr_data_rdonly(struct bpf_dynptr *ptr, u32 offset, u32 len);
>
> which gets a read-only pointer to the underlying dynptr data.
>
> This is equivalent to bpf_dynptr_data(), except the pointer returned is
> read-only, which allows this to support both read-write and read-only
> dynptrs.
>
> One example where this will be useful is for skb dynptrs where the
> program type only allows read-only access to packet data. This API will
> provide a way to obtain a data slice that can be used for direct reads.
>
> Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
next prev parent reply other threads:[~2022-09-09 15:52 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-08 0:02 [PATCH bpf-next v1 0/8] Dynptr convenience helpers Joanne Koong
2022-09-08 0:02 ` [PATCH bpf-next v1 1/8] bpf: Add bpf_dynptr_data_rdonly Joanne Koong
2022-09-09 15:29 ` Song Liu
2022-09-09 15:32 ` Alexei Starovoitov
2022-09-09 15:59 ` Song Liu
2022-09-09 15:51 ` Shmulik Ladkani [this message]
2022-09-08 0:02 ` [PATCH bpf-next v1 2/8] bpf: Add bpf_dynptr_trim and bpf_dynptr_advance Joanne Koong
2022-09-09 15:32 ` Song Liu
2022-09-09 16:16 ` Shmulik Ladkani
2022-09-28 22:14 ` Andrii Nakryiko
2022-09-08 0:02 ` [PATCH bpf-next v1 3/8] bpf: Add bpf_dynptr_is_null and bpf_dynptr_is_rdonly Joanne Koong
2022-09-09 15:46 ` Song Liu
2022-09-09 21:28 ` Joanne Koong
2022-09-09 23:17 ` Song Liu
2022-09-08 0:02 ` [PATCH bpf-next v1 4/8] bpf: Add bpf_dynptr_get_size and bpf_dynptr_get_offset Joanne Koong
2022-09-09 16:52 ` Shmulik Ladkani
2022-09-09 20:37 ` Joanne Koong
2022-09-08 0:02 ` [PATCH bpf-next v1 5/8] bpf: Add bpf_dynptr_clone Joanne Koong
2022-09-09 16:41 ` Shmulik Ladkani
2022-09-09 22:18 ` Joanne Koong
2022-09-10 5:31 ` Shmulik Ladkani
2022-09-28 22:34 ` Andrii Nakryiko
2022-09-28 22:29 ` Andrii Nakryiko
2022-09-08 0:02 ` [PATCH bpf-next v1 6/8] bpf: Add verifier support for custom callback return range Joanne Koong
2022-09-08 0:02 ` [PATCH bpf-next v1 7/8] bpf: Add bpf_dynptr_iterator Joanne Koong
2022-09-19 0:07 ` Kumar Kartikeya Dwivedi
2022-09-28 22:47 ` Andrii Nakryiko
2022-09-28 22:41 ` Andrii Nakryiko
2022-09-29 0:31 ` Kumar Kartikeya Dwivedi
2022-09-29 0:43 ` Andrii Nakryiko
2022-10-02 16:45 ` Kumar Kartikeya Dwivedi
2022-10-03 18:39 ` Andrii Nakryiko
2022-09-08 0:02 ` [PATCH bpf-next v1 8/8] selftests/bpf: Tests for dynptr convenience helpers Joanne Koong
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