[Ocfs2-devel] [PATCH 2/3 V2] ocfs2: Add FITRIM ioctl.

[Sunil Mushran <sunil.mushran@oracle.com>]

Reviewed-by: Sunil Mushran<sunil.mushran@oracle.com>


On 05/22/2011 07:36 PM, Tao Ma wrote:
> From: Tao Ma<boyu.mt@taobao.com>
>
> Add the corresponding ioctl function for FITRIM.
>
> Signed-off-by: Tao Ma<boyu.mt@taobao.com>
> ---
>   fs/ocfs2/ioctl.c |   24 ++++++++++++++++++++++++
>   1 files changed, 24 insertions(+), 0 deletions(-)
>
> diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
> index 8f13c59..312a28f 100644
> --- a/fs/ocfs2/ioctl.c
> +++ b/fs/ocfs2/ioctl.c
> @@ -542,6 +542,29 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>   			return -EFAULT;
>
>   		return ocfs2_info_handle(inode,&info, 0);
> +	case FITRIM:
> +	{
> +		struct super_block *sb = inode->i_sb;
> +		struct fstrim_range range;
> +		int ret = 0;
> +
> +		if (!capable(CAP_SYS_ADMIN))
> +			return -EPERM;
> +
> +		if (copy_from_user(&range, (struct fstrim_range *)arg,
> +		    sizeof(range)))
> +			return -EFAULT;
> +
> +		ret = ocfs2_trim_fs(sb,&range);
> +		if (ret<  0)
> +			return ret;
> +
> +		if (copy_to_user((struct fstrim_range *)arg,&range,
> +		    sizeof(range)))
> +			return -EFAULT;
> +
> +		return 0;
> +	}
>   	default:
>   		return -ENOTTY;
>   	}
> @@ -569,6 +592,7 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
>   	case OCFS2_IOC_GROUP_EXTEND:
>   	case OCFS2_IOC_GROUP_ADD:
>   	case OCFS2_IOC_GROUP_ADD64:
> +	case FITRIM:
>   		break;
>   	case OCFS2_IOC_REFLINK:
>   		if (copy_from_user(&args, (struct reflink_arguments *)arg,