NFS: create completion structure to pass into page_init functions

Factors out the code that will need to change when directio
starts using these code paths.  This will allow directio to use
the generic pagein and flush routines

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 5c520344d8ad..bc5b7a5e787e 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -67,6 +67,7 @@ struct nfs_pageio_descriptor {
 	int 			pg_ioflags;
 	int			pg_error;
 	const struct rpc_call_ops *pg_rpc_callops;
+	const struct nfs_pgio_completion_ops *pg_completion_ops;
 	struct pnfs_layout_segment *pg_lseg;
 };
 
@@ -83,6 +84,7 @@ extern	void nfs_release_request(struct nfs_page *req);
 extern	void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
 			     struct inode *inode,
 			     const struct nfs_pageio_ops *pg_ops,
+			     const struct nfs_pgio_completion_ops *compl_ops,
 			     size_t bsize,
 			     int how);
 extern	int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 0d17db7973de..6fa1d2278c9d 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1207,6 +1207,7 @@ struct nfs_pgio_header {
 	loff_t			io_start;
 	const struct rpc_call_ops *mds_ops;
 	void (*release) (struct nfs_pgio_header *hdr);
+	const struct nfs_pgio_completion_ops *completion_ops;
 	spinlock_t		lock;
 	/* fields protected by lock */
 	int			pnfs_error;
@@ -1261,6 +1262,11 @@ struct nfs_commit_data {
 	int (*commit_done_cb) (struct rpc_task *task, struct nfs_commit_data *data);
 };
 
+struct nfs_pgio_completion_ops {
+	void	(*error_cleanup)(struct list_head *head);
+	void	(*completion)(struct nfs_pgio_header *hdr);
+};
+
 struct nfs_unlinkdata {
 	struct hlist_node list;
 	struct nfs_removeargs args;