unix_diag: Unix peer inode NLA

Report the peer socket inode ID as NLA. With this it's finally
possible to find out the other end of an interesting unix connection.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/unix_diag.h b/include/linux/unix_diag.h
index 3e53adbe9c7f..2d74a86024ac 100644
--- a/include/linux/unix_diag.h
+++ b/include/linux/unix_diag.h
@@ -13,6 +13,7 @@ struct unix_diag_req {
 
 #define UDIAG_SHOW_NAME         0x00000001      /* show name (not path) */
 #define UDIAG_SHOW_VFS          0x00000002      /* show VFS inode info */
+#define UDIAG_SHOW_PEER         0x00000004      /* show peer socket info */
 
 struct unix_diag_msg {
         __u8    udiag_family;
@@ -27,6 +28,7 @@ struct unix_diag_msg {
 enum {
         UNIX_DIAG_NAME,
         UNIX_DIAG_VFS,
+        UNIX_DIAG_PEER,
 
         UNIX_DIAG_MAX,
 };