linux-ext4 - Re: [PATCH, RFC] ext4: add EXT4_IOC_ALLOC_DA

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Date:	Tue, 24 Feb 2009 15:08:32 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH, RFC] ext4: add EXT4_IOC_ALLOC_DA_BLKS ioctl

On Tue, Feb 24, 2009 at 12:05:50AM -0500, Theodore Ts'o wrote:
> diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
> index 22dd29f..0d59f5f 100644
> --- a/fs/ext4/ioctl.c
> +++ b/fs/ext4/ioctl.c
> @@ -262,6 +262,19 @@ setversion_out:
>  		return err;
>  	}
> 
> +	case EXT4_IOC_ALLOC_DA_BLKS:
> +	{
> +		int err;
> +		if (!is_owner_or_cap(inode))
> +			return -EACCES;
> +
> +		err = mnt_want_write(filp->f_path.mnt);
> +		if (err)
> +			return err;
> +		err = ext4_alloc_da_blocks(inode);
> +		return err;
> +	}
> +

I guess we need a  matching
	mnt_drop_write();

>  	default:
>  		return -ENOTTY;
>  	}
> -- 
> 1.5.6.3
> 
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