nfsd: introduce export flag for v4 pseudoroot

[pandora-kernel.git] / include / linux / nfsd / export.h

diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index 4cafbe1..41f0d4e 100644 (file)
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -39,6 +39,16 @@
 #define NFSEXP_FSID            0x2000
 #define        NFSEXP_CROSSMOUNT       0x4000
 #define        NFSEXP_NOACL            0x8000  /* reserved for possible ACL related use */
+/*
+ * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
+ * clients, and only to the single directory that is the root of the
+ * export; further lookup and readdir operations are treated as if every
+ * subdirectory was a mountpoint, and ignored if they are not themselves
+ * exported.  This is used by nfsd and mountd to construct the NFSv4
+ * pseudofilesystem, which provides access only to paths leading to each
+ * exported filesystem.
+ */
+#define        NFSEXP_V4ROOT           0x10000
 /* All flags that we claim to support.  (Note we don't support NOACL.) */
 #define NFSEXP_ALLFLAGS                0x7E3F