linux-ext4 - Re: [PATCH] fs/ext*,f2fs,jffs2,reiserfs: give comments for aclsize and count calculation

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Date:	Fri, 04 Jan 2013 09:45:53 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	jack@...e.cz
CC:	akpm@...ux-foundation.org, adilger.kernel@...ger.ca,
	Theodore Ts'o <tytso@....edu>, jaegeuk.kim@...sung.com,
	dwmw2@...radead.org, torvalds@...ux-foundation.org,
	linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
	linux-mtd@...ts.infradead.org, reiserfs-devel@...r.kernel.org
Subject: Re: [PATCH] fs/ext*,f2fs,jffs2,reiserfs: give comments for aclsize
 and count calculation



------- Original Message -------
From: Jan Kara <jack@...e.cz>
To: Chen Gang <gang.chen@...anux.com>
Cc: jack@...e.cz; akpm@...ux-foundation.org;adilger.kernel@...ger.ca; Theodore Tso <tytso@....edu>;jaegeuk.kim@...sung.com; dwmw2@...radead.org;torvalds@...ux-foundation.org; linux-ext4@...r.kernel.org;linux-f2fs-devel@...ts.sourceforge.net;linux-mtd@...ts.infradead.org; reiserfs-devel@...r.kernel.org
Sent: Mon, 31 Dec 2012 16:45:59 +0100
Subject: Re: [PATCH] fs/ext*,f2fs,jffs2,reiserfs: give comments for aclsize and count calculation

>   I agree that defining a constant for this makes sence. Just please be
> more verbose with the comment. This is hardly readable for anyone not
> knowing what's going on in advance. Also braces around 4 are superfluous.
> Add something like the comment below before posix_acl_valid():
> 

  thank for your suggestions.

> /*
>  * posix_acl_valid() makes sure ACL format is the following:
>  * ACL_USER_OBJ ACL_USER*[1] ACL_GROUP_OBJ ACL_GROUP*[1] ACL_MASK[2] ACL_OTHER
>  *
>  * [1] Where * is the regexp sense of "0 or more times"
>  * [2] If ACL_USER or ACL_GROUP is present, then ACL_MASK must be present.
>  */
> 
> Then add comment before definition of ACL_MAX_SHORT_ENTRY:
> /*
>  * posix_acl_valid() makes sure that if there are <= 4 ACL entries, then
>  * all of them are short. Otherwise exactly 4 entries are short ones and
>  * other have full length. See comment before that function for exact ACL
>  * format.
>  */

  I will send patch v2 which include the contents which you provide.

    and also add Signed-of-by Jan Kara <jack@...e.cz>

  thanks.


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