From: Martin KaFai Lau <kafai@fb.com>
To: KP Singh <kpsingh@chromium.org>
Cc: <linux-kernel@vger.kernel.org>, <bpf@vger.kernel.org>,
Song Liu <songliubraving@fb.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Paul Turner <pjt@google.com>, Jann Horn <jannh@google.com>,
Hao Luo <haoluo@google.com>
Subject: Re: [PATCH bpf-next v4 2/9] bpf: Implement task local storage
Date: Thu, 5 Nov 2020 13:16:44 -0800 [thread overview]
Message-ID: <20201105211644.onspyd6cytrskiw3@kafai-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <20201105144755.214341-3-kpsingh@chromium.org>
On Thu, Nov 05, 2020 at 03:47:48PM +0100, KP Singh wrote:
> From: KP Singh <kpsingh@google.com>
>
> Similar to bpf_local_storage for sockets and inodes add local storage
> for task_struct.
>
> The life-cycle of storage is managed with the life-cycle of the
> task_struct. i.e. the storage is destroyed along with the owning task
> with a callback to the bpf_task_storage_free from the task_free LSM
> hook.
>
> The BPF LSM allocates an __rcu pointer to the bpf_local_storage in
> the security blob which are now stackable and can co-exist with other
> LSMs.
>
> The userspace map operations can be done by using a pid fd as a key
> passed to the lookup, update and delete operations.
>
> Acked-by: Song Liu <songliubraving@fb.com>
> Signed-off-by: KP Singh <kpsingh@google.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
next prev parent reply other threads:[~2020-11-05 21:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 14:47 [PATCH bpf-next v4 0/9] Implement task_local_storage KP Singh
2020-11-05 14:47 ` [PATCH bpf-next v4 1/9] bpf: Allow LSM programs to use bpf spin locks KP Singh
2020-11-05 18:45 ` Song Liu
2020-11-05 20:39 ` Martin KaFai Lau
2020-11-05 14:47 ` [PATCH bpf-next v4 2/9] bpf: Implement task local storage KP Singh
2020-11-05 21:16 ` Martin KaFai Lau [this message]
2020-11-05 14:47 ` [PATCH bpf-next v4 3/9] libbpf: Add support for " KP Singh
2020-11-05 14:47 ` [PATCH bpf-next v4 4/9] bpftool: " KP Singh
2020-11-05 21:18 ` Martin KaFai Lau
2020-11-05 14:47 ` [PATCH bpf-next v4 5/9] bpf: Implement get_current_task_btf and RET_PTR_TO_BTF_ID KP Singh
2020-11-05 21:24 ` Martin KaFai Lau
2020-11-05 14:47 ` [PATCH bpf-next v4 6/9] bpf: Fix tests for local_storage KP Singh
2020-11-05 14:47 ` [PATCH bpf-next v4 7/9] bpf: Update selftests for local_storage to use vmlinux.h KP Singh
2020-11-05 14:47 ` [PATCH bpf-next v4 8/9] bpf: Add tests for task_local_storage KP Singh
2020-11-05 22:02 ` Martin KaFai Lau
2020-11-05 22:32 ` KP Singh
2020-11-05 14:47 ` [PATCH bpf-next v4 9/9] bpf: Exercise syscall operations for inode and sk storage KP Singh
2020-11-05 22:07 ` Martin KaFai Lau
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