[Cluster-devel] [GFS2 PATCH] GFS2: Allocate reservation during splice_write

[Steven Whitehouse <swhiteho@redhat.com>]

Hi,

On 19/02/15 18:24, Bob Peterson wrote:
> Hi,
>
> This patch adds a GFS2-specific function for splice_write which
> first calls function gfs2_rs_alloc to make sure a reservation
> structure has been allocated before attempting to reserve blocks.
>
> Regards,
>
> Bob Peterson
> Red Hat File Systems
>
> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>

Steve.

> ---
>   fs/gfs2/file.c | 20 ++++++++++++++++++--
>   1 file changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
> index ec9c2d3..bd86e79 100644
> --- a/fs/gfs2/file.c
> +++ b/fs/gfs2/file.c
> @@ -1063,6 +1063,22 @@ static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
>   	}
>   }
>   
> +static ssize_t gfs2_file_splice_write(struct pipe_inode_info *pipe,
> +				      struct file *out, loff_t *ppos,
> +				      size_t len, unsigned int flags)
> +{
> +	int error;
> +	struct gfs2_inode *ip = GFS2_I(out->f_mapping->host);
> +
> +	error = gfs2_rs_alloc(ip);
> +	if (error)
> +		return (ssize_t)error;
> +
> +	gfs2_size_hint(out, *ppos, len);
> +
> +	return iter_file_splice_write(pipe, out, ppos, len, flags);
> +}
> +
>   const struct file_operations gfs2_file_fops = {
>   	.llseek		= gfs2_llseek,
>   	.read		= new_sync_read,
> @@ -1077,7 +1093,7 @@ const struct file_operations gfs2_file_fops = {
>   	.lock		= gfs2_lock,
>   	.flock		= gfs2_flock,
>   	.splice_read	= generic_file_splice_read,
> -	.splice_write	= iter_file_splice_write,
> +	.splice_write	= gfs2_file_splice_write,
>   	.setlease	= simple_nosetlease,
>   	.fallocate	= gfs2_fallocate,
>   };
> @@ -1107,7 +1123,7 @@ const struct file_operations gfs2_file_fops_nolock = {
>   	.release	= gfs2_release,
>   	.fsync		= gfs2_fsync,
>   	.splice_read	= generic_file_splice_read,
> -	.splice_write	= iter_file_splice_write,
> +	.splice_write	= gfs2_file_splice_write,
>   	.setlease	= generic_setlease,
>   	.fallocate	= gfs2_fallocate,
>   };