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>

1 files changed, 2 insertions, 0 deletions

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 */