vfs: Add 64 bit i_version support

The i_version field of the inode is changed to be a 64-bit counter that
is set on every inode creation and that is incremented every time the
inode data is modified (similarly to the "ctime" time-stamp).
The aim is to fulfill a NFSv4 requirement for rfc3530.
This first part concerns the vfs, it converts the 32-bit i_version in
the generic inode to a 64-bit, a flag is added in the super block in
order to check if the feature is enabled and the i_version is
incremented in the vfs.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net>
Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index d196840127c6..84750c8e9f95 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -301,7 +301,8 @@ int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 
         inode = dentry->d_inode;
 
-        _enter("{ ino=%lu v=%lu }", inode->i_ino, inode->i_version);
+        _enter("{ ino=%lu v=%llu }", inode->i_ino,
+                (unsigned long long)inode->i_version);
 
         generic_fillattr(inode, stat);
         return 0;