NFSv4.1 cache mdsthreshold values on OPEN

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 7980756b2f57..29fd23c0efdc 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -227,6 +227,7 @@ int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
                         const struct nfs_pgio_completion_ops *compl_ops);
 int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
                         const struct nfs_pgio_completion_ops *compl_ops);
+struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
 
 /* nfs4_deviceid_flags */
 enum {
@@ -360,6 +361,14 @@ static inline int pnfs_return_layout(struct inode *ino)
         return 0;
 }
 
+static inline bool
+pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
+                   struct nfs_server *nfss)
+{
+        return (dst && src && src->bm != 0 &&
+                                        nfss->pnfs_curr_ld->id == src->l_type);
+}
+
 #ifdef NFS_DEBUG
 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
 #else
@@ -485,6 +494,18 @@ static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
         return 0;
 }
 
+static inline bool
+pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
+                   struct nfs_server *nfss)
+{
+        return false;
+}
+
+static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
+{
+        return NULL;
+}
+
 #endif /* CONFIG_NFS_V4_1 */
 
 #endif /* FS_NFS_PNFS_H */