Embed a struct path into struct nameidata instead of nd->{dentry,mnt}

This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.

Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
  <dentry,vfsmount> pairs
- it prepares the VFS for stacking support since it is essential to have a
  struct path in every place where the stack can be traversed
- it reduces the overall code size:

without patch series:
   text    data     bss     dec     hex filename
5321639  858418  715768 6895825  6938d1 vmlinux

with patch series:
   text    data     bss     dec     hex filename
5320026  858418  715768 6894212  693284 vmlinux

This patch:

Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 12 insertions, 12 deletions

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index edd1e44e9d47..e23861152101 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -77,13 +77,13 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
         struct vfsmount *vfsmount_save;
         int rc;
 
-        dentry_save = nd->dentry;
-        vfsmount_save = nd->mnt;
-        nd->dentry = lower_dentry;
-        nd->mnt = lower_mnt;
+        dentry_save = nd->path.dentry;
+        vfsmount_save = nd->path.mnt;
+        nd->path.dentry = lower_dentry;
+        nd->path.mnt = lower_mnt;
         rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
-        nd->dentry = dentry_save;
-        nd->mnt = vfsmount_save;
+        nd->path.dentry = dentry_save;
+        nd->path.mnt = vfsmount_save;
         return rc;
 }
 
@@ -819,14 +819,14 @@ ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
         int rc;
 
         if (nd) {
-                struct vfsmount *vfsmnt_save = nd->mnt;
-                struct dentry *dentry_save = nd->dentry;
+                struct vfsmount *vfsmnt_save = nd->path.mnt;
+                struct dentry *dentry_save = nd->path.dentry;
 
-                nd->mnt = ecryptfs_dentry_to_lower_mnt(nd->dentry);
-                nd->dentry = ecryptfs_dentry_to_lower(nd->dentry);
+                nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry);
+                nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry);
                 rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
-                nd->mnt = vfsmnt_save;
-                nd->dentry = dentry_save;
+                nd->path.mnt = vfsmnt_save;
+                nd->path.dentry = dentry_save;
         } else
                 rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
         return rc;