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Date: Thu, 5 Nov 2020 13:16:44 -0800 From: Martin KaFai Lau <kafai@...com> To: KP Singh <kpsingh@...omium.org> CC: <linux-kernel@...r.kernel.org>, <bpf@...r.kernel.org>, Song Liu <songliubraving@...com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Paul Turner <pjt@...gle.com>, Jann Horn <jannh@...gle.com>, Hao Luo <haoluo@...gle.com> Subject: Re: [PATCH bpf-next v4 2/9] bpf: Implement task local storage On Thu, Nov 05, 2020 at 03:47:48PM +0100, KP Singh wrote: > From: KP Singh <kpsingh@...gle.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@...com> > Signed-off-by: KP Singh <kpsingh@...gle.com> Acked-by: Martin KaFai Lau <kafai@...com>
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