linux-ext4 - Re: [RFC][PATCH 2/7]ext4: Add EXT4_IOC_CLR_GLOBAL_ALLOC

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Date:	Wed, 24 Jun 2009 01:21:31 +0200
From:	Andreas Dilger <adilger@....com>
To:	Akira Fujita <a-fujita@...jp.nec.com>
Cc:	"Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [RFC][PATCH 2/7]ext4: Add EXT4_IOC_CLR_GLOBAL_ALLOC_RULE	clears
 block allocation restriction

On Jun 23, 2009  17:25 +0900, Akira Fujita wrote:
> Block allocation restriction is cleared with this ioctl or umount filesystem.
> 
>  #define EXT4_IOC_CLR_GLOBAL_ALLOC_RULE _IOW('f', 17, struct ext4_alloc_rule);
> 
>   struct ext4_alloc_rule {
>         __u64 start;            /* start physical offset to clear rule */
>         __u64 len;              /* number of blocks to be clear */
>         __u32 alloc_flag;       /* not used, should be zero */
>   };

Why not call EXT4_IOC_ADD_GLOBAL_ALLOC_RULE with a "clear" flag?

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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