linux-kernel - Re: [PATCH] vfs, seqfile: make mangle

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Date:	Sun, 23 Nov 2008 13:06:16 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Török Edwin <edwintorok@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Alexander Viro <viro@....linux.org.uk>, srostedt@...hat.com,
	a.p.zijlstra@...llo.nl, sandmann@...mi.au.dk,
	linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk
Subject: Re: [PATCH] vfs, seqfile: make mangle_path() global

Ingo Molnar wrote:
> * Török Edwin <edwintorok@...il.com> wrote:
> 
>>  fs/seq_file.c            |   14 +++++++-
>>  include/linux/seq_file.h |    1 +
> 
> Note, i've split these bits out into a separate patch - see it 
> attached below.
> 
> 	Ingo
> 
> ------------------>
> From 74e2f334f4440cbcb63e9ebbcdcea430d41bdfa3 Mon Sep 17 00:00:00 2001
> From: =?utf-8?q?T=C3=B6r=C3=B6k=20Edwin?= <edwintorok@...il.com>
> Date: Sat, 22 Nov 2008 13:28:48 +0200
> Subject: [PATCH] vfs, seqfile: make mangle_path() global
> MIME-Version: 1.0
> Content-Type: text/plain; charset=utf-8
> Content-Transfer-Encoding: 8bit
> 
> Impact: expose new VFS API
> 
> make mangle_path() available, as per the suggestions of Christoph Hellwig
> and Al Viro:
> 
>   http://lkml.org/lkml/2008/11/4/338
> 
> Signed-off-by: Török Edwin <edwintorok@...il.com>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
>  fs/seq_file.c            |   14 +++++++++++++-
>  include/linux/seq_file.h |    1 +
>  2 files changed, 14 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/seq_file.c b/fs/seq_file.c
> index eba2eab..f5b61cc 100644
> --- a/fs/seq_file.c
> +++ b/fs/seq_file.c
> @@ -357,7 +357,18 @@ int seq_printf(struct seq_file *m, const char *f, ...)
>  }
>  EXPORT_SYMBOL(seq_printf);
>  
> -static char *mangle_path(char *s, char *p, char *esc)
> +/**
> + * 	mangle_path - mangle and copy path to buffer beginning
> + * 	@s - buffer start
> + * 	@p - beginning of path in above buffer
> + *      @esc - set of characters that need escaping

Format for function parameters is:

 * @esc: set of characters that need escaping

please.  (i.e., use : instead of -)

> + *
> + *      Copy the path from @p to @s, replacing each occurrence of character from
> + *      @esc with usual octal escape.
> + *      Returns pointer past last written character in @s, or NULL in case of
> + *      failure.
> + */
> +char *mangle_path(char *s, char *p, char *esc)
>  {
>  	while (s <= p) {
>  		char c = *p++;
> @@ -376,6 +387,7 @@ static char *mangle_path(char *s, char *p, char *esc)
>  	}
>  	return NULL;
>  }
> +EXPORT_SYMBOL_GPL(mangle_path);
>  
>  /*
>   * return the absolute path of 'dentry' residing in mount 'mnt'.
> diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
> index dc50bcc..b3dfa72 100644
> --- a/include/linux/seq_file.h
> +++ b/include/linux/seq_file.h
> @@ -34,6 +34,7 @@ struct seq_operations {
>  
>  #define SEQ_SKIP 1
>  
> +char *mangle_path(char *s, char *p, char *esc);
>  int seq_open(struct file *, const struct seq_operations *);
>  ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
>  loff_t seq_lseek(struct file *, loff_t, int);


-- 
~Randy
--
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