linux-kernel - Re: [PATCH RESUBMIT 0/2] fs/seq_file: Add seq_open

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Message-ID: <CAGXu5jJS3Xg+uGm6L+fNau1VBHZpE=EJNRnFZAwwK5fW3B+TjA@mail.gmail.com>
Date:	Wed, 24 Sep 2014 11:06:37 -0700
From:	Kees Cook <keescook@...omium.org>
To:	Rob Jones <rob.jones@...ethink.co.uk>
Cc:	Randy Dunlap <rdunlap@...radead.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-kernel@...ethink.co.uk,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Subject: Re: [PATCH RESUBMIT 0/2] fs/seq_file: Add seq_open_init()

On Wed, Sep 24, 2014 at 4:15 AM, Rob Jones <rob.jones@...ethink.co.uk> wrote:
> Series resubmitted due to a typo in an email address.
>
> This patch series implements and documents a new interface function for
> seq_file.
>
> The existing set of open functions: seq_open(), seq_open_private() and
> __seq_open_private() satisfy the majority of use cases however there is
> one more use case that is also very common that this new function
> addresses.
>
> This case is where the iterator needs information that is available only at
> the time the seq_file is opened but does not need any space allocated, e.g.
> access to the inode structure. This type of open occurs, by my best estimate,
> in well over 40 places.
>
> Using the new function saves at least two lines of boilerplate code per
> instance as well as making the code easier to follow. The additional code
> in seq_file.c to implement the function is minimal as the first place that
> code can be removed is within seq_file.c itself.
>
> Once this patch is accepted, the instances of boilerplate code can be
> addressed.

Would it be possible to write a coccinelle patch for the replacements?

This seems like a good idea. Thanks!

Acked-by: Kees Cook <keescook@...omium.org>

-Kees

>
> The documentation of seq_open() and its variants has been re-worked to try
> to guide users towards the most appropriate variant for their application.
>
> Rob Jones (2):
>   fs/seq_file: Create new function seq_open_init()
>   Documentation/filesystem/seq_file: document seq_open_init()
>
>  Documentation/filesystems/seq_file.txt |   58 +++++++++++++++++++++-----------
>  fs/seq_file.c                          |   34 ++++++++++++-------
>  include/linux/seq_file.h               |    1 +
>  3 files changed, 62 insertions(+), 31 deletions(-)
>
> --
> 1.7.10.4
>



-- 
Kees Cook
Chrome OS Security
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