9p: add support for sticky bit

GDM gets unhappy if /var/gdm doesn't have the sticky bit set.  This patch adds
support for the sticky bit in much the same way setuid/setgid is supported.

With this patch, I can launch X from a v9fs rootfs (although I quickly run out
of fds in the server once gnome starts up).

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Acked-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 625346c47ee2..585eb4496990 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -124,6 +124,7 @@ enum {
         P9_DMSOCKET = 0x00100000,
         P9_DMSETUID = 0x00080000,
         P9_DMSETGID = 0x00040000,
+        P9_DMSETVTX = 0x00010000,
 };
 
 /* qid.types */