NFS: Add FS-Cache option bit and debug bit

Add FS-Cache option bit to nfs_server struct.  This is set to indicate local
on-disk caching is enabled for a particular superblock.

Also add debug bit for local caching operations.

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>

2 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index bde2557c2a9c..fd3e7f9c6fd3 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -583,6 +583,7 @@ extern void * nfs_root_data(void);
 #define NFSDBG_CALLBACK         0x0100
 #define NFSDBG_CLIENT           0x0200
 #define NFSDBG_MOUNT            0x0400
+#define NFSDBG_FSCACHE          0x0800
 #define NFSDBG_ALL              0xFFFF
 
 #ifdef __KERNEL__
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 29b1e40dce99..a749f8564aa6 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -96,6 +96,8 @@ struct nfs_server {
         unsigned int            acdirmin;
         unsigned int            acdirmax;
         unsigned int            namelen;
+        unsigned int            options;        /* extra options enabled by mount */
+#define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 
         struct nfs_fsid         fsid;
         __u64                   maxfilesize;    /* maximum file size */