From: Christoph Hellwig <hch@infradead.org>
To: Leah Rumancik <leah.rumancik@gmail.com>
Cc: bpf@vger.kernel.org, linux-block@vger.kernel.org,
orbekk@google.com, harshads@google.com, jasiu@google.com,
saranyamohan@google.com, tytso@google.com, bvanassche@google.com
Subject: Re: [RFC PATCH 0/4] block/bpf: add eBPF based block layer IO filtering
Date: Mon, 17 Aug 2020 07:37:57 +0100 [thread overview]
Message-ID: <20200817063757.GA21966@infradead.org> (raw)
In-Reply-To: <20200812163305.545447-1-leah.rumancik@gmail.com>
On Wed, Aug 12, 2020 at 04:33:01PM +0000, Leah Rumancik wrote:
> This patch series adds support for a new security mechanism to filter IO
> in the block layer. With this patch series, the policy for IO filtering
> can be programmed into an eBPF program which gets attached to the struct
> gendisk. The filter can either drop or allow IO requests. It cannot modify
> requests. We do not support splitting of IOs, and we do not support
> filtering of IOs that bypass submit_bio (such as SG_IO, NVMe passthrough).
Which means it is not in any way useful for security, but just snake oil.
But even if it wasn't this is a way to big hammer with impact for to
the I/O fast path to be acceptable.
next prev parent reply other threads:[~2020-08-17 6:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 16:33 [RFC PATCH 0/4] block/bpf: add eBPF based block layer IO filtering Leah Rumancik
2020-08-12 16:33 ` [RFC PATCH 1/4] bpf: add new prog_type BPF_PROG_TYPE_IO_FILTER Leah Rumancik
2020-08-13 23:00 ` Martin KaFai Lau
2020-09-04 15:43 ` Leah Rumancik
2020-08-17 14:18 ` Bob Liu
2020-08-17 16:32 ` Alexei Starovoitov
2020-09-04 16:46 ` Leah Rumancik
2020-09-04 18:50 ` Alexei Starovoitov
2020-09-17 18:33 ` Leah Rumancik
2020-09-01 16:53 ` Leah Rumancik
2020-09-02 7:36 ` Bob Liu
2020-08-18 12:53 ` Jakub Sitnicki
2020-09-04 17:29 ` Leah Rumancik
2020-08-12 16:33 ` [RFC PATCH 2/4] bpf: add protect_gpt sample program Leah Rumancik
2020-08-13 22:58 ` Martin KaFai Lau
2020-09-01 16:33 ` Leah Rumancik
2020-08-12 16:33 ` [RFC PATCH 3/4] bpf: add eBPF IO filter documentation Leah Rumancik
2020-08-12 17:04 ` Bart Van Assche
2020-08-12 17:50 ` Jonathan Corbet
2020-09-01 15:35 ` Leah Rumancik
2020-08-12 16:33 ` [RFC PATCH 4/4] bpf: add BPF_PROG_TYPE_LSM to bpftool name array Leah Rumancik
2020-08-12 17:00 ` Bart Van Assche
2020-08-12 18:17 ` Tobias Klauser
2020-09-01 15:18 ` Leah Rumancik
2020-08-17 6:37 ` Christoph Hellwig [this message]
2020-08-18 2:44 ` [RFC PATCH 0/4] block/bpf: add eBPF based block layer IO filtering Ming Lei
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