NFS: Add a boot parameter to disable 64 bit inode numbers

This boot parameter will allow legacy 32-bit applications which call stat()
to continue to function even if the NFSv3/v4 server uses 64-bit inode
numbers.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4d175c751246..83e21045114e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1073,6 +1073,13 @@ and is between 256 and 4096 characters. It is defined in the file
                         [NFS] set the maximum lifetime for idmapper cache
                         entries.
 
+        nfs.enable_ino64=
+                        [NFS] enable 64-bit inode numbers.
+                        If zero, the NFS client will fake up a 32-bit inode
+                        number for the readdir() and stat() syscalls instead
+                        of returning the full 64-bit number.
+                        The default is to return 64-bit inode numbers.
+
         nmi_watchdog=   [KNL,BUGS=X86-32] Debugging features for SMP kernels
 
         no387           [BUGS=X86-32] Tells the kernel to use the 387 maths