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From: "Mickaël Salaün" <mic@digikod.net>
To: James Morris <jmorris@namei.org>
Cc: linux-kernel@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>,
	Andy Lutomirski <luto@amacapital.net>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Casey Schaufler <casey@schaufler-ca.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	David Drysdale <drysdale@google.com>,
	"David S . Miller" <davem@davemloft.net>,
	"Eric W . Biederman" <ebiederm@xmission.com>,
	James Morris <james.l.morris@oracle.com>,
	Jann Horn <jann@thejh.net>, Jonathan Corbet <corbet@lwn.net>,
	Matthew Garrett <mjg59@srcf.ucam.org>,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	Kees Cook <keescook@chromium.org>,
	Paul Moore <paul@paul-moore.com>,
	Sargun Dhillon <sargun@sargun.me>,
	"Serge E . Hallyn" <serge@hallyn.com>,
	Shuah Khan <shuah@kernel.org>, Tejun Heo <tj@kernel.org>,
	Thomas Graf <tgraf@suug.ch>, Will Drewry <wad@chromium.org>,
	kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
	linux-security-module@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH v5 03/10] bpf: Define handle_fs and add a new helper bpf_handle_fs_get_mode()
Date: Wed, 1 Mar 2017 23:20:54 +0100
Message-ID: <3e3d2c43-9d67-2b1e-174a-1656708139f2@digikod.net> (raw)
In-Reply-To: <alpine.LRH.2.20.1703012028110.9253@namei.org>

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On 01/03/2017 10:32, James Morris wrote:
> On Wed, 22 Feb 2017, Mickaël Salaün wrote:
> 
>> Add an eBPF function bpf_handle_fs_get_mode(handle_fs) to get the mode
>> of a an abstract object wrapping either a file, a dentry, a path, or an
>> inode.
>>
>> Changes since v4:
>> * use a file abstraction (handle) to wrap inode, dentry, path and file
>>   structs
> 
> Good to see these abstractions.  As discussed at LPC, we need to ensure 
> that we don't couple the Landlock API too closely with the LSM API, as the 
> former is an ABI exposed to userland -- we don't want to lose the ability 
> to change LSM internally due to breaking Landlock policies.

Right, it is the case now, especially with the Landlock events.

> 
>> @@ -82,6 +87,8 @@ enum bpf_arg_type {
>>  
>>  	ARG_PTR_TO_CTX,		/* pointer to context */
>>  	ARG_ANYTHING,		/* any (initialized) argument is ok */
>> +
>> +	ARG_CONST_PTR_TO_HANDLE_FS,	/* pointer to an abstract FS struct */
>>  };
> 
> Extraneous whitespace?

It is on purpose, following the same rules as used for this enum.

 Mickaël


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  reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-22  1:26 [PATCH v5 00/10] Landlock LSM: Toward unprivileged sandboxing Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 01/10] bpf: Add eBPF program subtype and is_valid_subtype() verifier Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 02/10] bpf,landlock: Define an eBPF program type for Landlock Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 03/10] bpf: Define handle_fs and add a new helper bpf_handle_fs_get_mode() Mickaël Salaün
2017-03-01  9:32   ` James Morris
2017-03-01 22:20     ` Mickaël Salaün [this message]
2017-02-22  1:26 ` [PATCH v5 04/10] landlock: Add LSM hooks related to filesystem Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 05/10] seccomp: Split put_seccomp_filter() with put_seccomp() Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 06/10] seccomp,landlock: Handle Landlock events per process hierarchy Mickaël Salaün
2017-02-28 20:01   ` Andy Lutomirski
2017-03-01 22:14     ` Mickaël Salaün
2017-03-01 22:20       ` Andy Lutomirski
2017-03-01 23:28         ` Mickaël Salaün
2017-03-02 16:36           ` Andy Lutomirski
2017-03-03  0:48             ` Mickaël Salaün
2017-03-03  0:55               ` Andy Lutomirski
2017-03-03  1:05                 ` Mickaël Salaün
2017-03-02 10:22   ` [kernel-hardening] " Djalal Harouni
2017-03-03  0:54     ` Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 07/10] bpf: Add a Landlock sandbox example Mickaël Salaün
2017-02-23 22:13   ` Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 08/10] seccomp: Enhance test_harness with an assert step mechanism Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 09/10] bpf,landlock: Add tests for Landlock Mickaël Salaün
2017-02-22  1:26 ` [PATCH v5 10/10] landlock: Add user and kernel documentation " Mickaël Salaün
2017-02-22  5:21   ` Andy Lutomirski
2017-02-22  7:43     ` Mickaël Salaün

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