NFS: Display local caching state

Display the local caching state in /proc/fs/nfsfs/volumes.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index 1ec3ebb0efcd..6e809bb0ff08 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -153,6 +153,16 @@ static inline void nfs_readpage_to_fscache(struct inode *inode,
                 __nfs_readpage_to_fscache(inode, page, sync);
 }
 
+/*
+ * indicate the client caching state as readable text
+ */
+static inline const char *nfs_server_fscache_state(struct nfs_server *server)
+{
+        if (server->fscache && (server->options & NFS_OPTION_FSCACHE))
+                return "yes";
+        return "no ";
+}
+
 
 #else /* CONFIG_NFS_FSCACHE */
 static inline int nfs_fscache_register(void) { return 0; }
@@ -201,5 +211,10 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx,
 static inline void nfs_readpage_to_fscache(struct inode *inode,
                                            struct page *page, int sync) {}
 
+static inline const char *nfs_server_fscache_state(struct nfs_server *server)
+{
+        return "no ";
+}
+
 #endif /* CONFIG_NFS_FSCACHE */
 #endif /* _NFS_FSCACHE_H */