Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6

[pandora-kernel.git] / fs / cifs / export.c

diff --git a/fs/cifs/export.c b/fs/cifs/export.c
index 96df1d5..893fd0a 100644 (file)
--- a/fs/cifs/export.c
+++ b/fs/cifs/export.c
@@ -5,7 +5,7 @@
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   Common Internet FileSystem (CIFS) client
- * 
+ *
  *   Operations related to support for exporting files via NFSD
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -22,32 +22,45 @@
  *   along with this library; if not, write to the Free Software
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
- 
- /* 
+
+ /*
   * See Documentation/filesystems/Exporting
   * and examples in fs/exportfs
+  *
+  * Since cifs is a network file system, an "fsid" must be included for
+  * any nfs exports file entries which refer to cifs paths.  In addition
+  * the cifs mount must be mounted with the "serverino" option (ie use stable
+  * server inode numbers instead of locally generated temporary ones).
+  * Although cifs inodes do not use generation numbers (have generation number
+  * of zero) - the inode number alone should be good enough for simple cases
+  * in which users want to export cifs shares with NFS. The decode and encode
+  * could be improved by using a new routine which expects 64 bit inode numbers
+  * instead of the default 32 bit routines in fs/exportfs
+  *
   */
 
 #include <linux/fs.h>
 #include <linux/exportfs.h>
- 
+#include "cifsglob.h"
+#include "cifs_debug.h"
+
 #ifdef CONFIG_CIFS_EXPERIMENTAL
- 
 static struct dentry *cifs_get_parent(struct dentry *dentry)
 {
-       /* BB need to add code here eventually to enable export via NFSD */
-       return ERR_PTR(-EACCES);
+       /* BB need to add code here eventually to enable export via NFSD */
+       cFYI(1, ("get parent for %p", dentry));
+       return ERR_PTR(-EACCES);
 }
- 
+
 struct export_operations cifs_export_ops = {
-       .get_parent = cifs_get_parent,
-/*     Following five export operations are unneeded so far and can default */         
-/*     .get_dentry =
-       .get_name =
-       .find_exported_dentry =
-       .decode_fh = 
-       .encode_fs =  */
- };
- 
+       .get_parent = cifs_get_parent,
+/*     Following five export operations are unneeded so far and can default:
+       .get_dentry =
+       .get_name =
+       .find_exported_dentry =
+       .decode_fh =
+       .encode_fs =  */
+};
+
 #endif /* EXPERIMENTAL */
- 
+