[glibc] Add SCM_SECURITY, SCM_PIDFD to bits/socket.h

[Joseph Myers <jsm28@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5ef608f36493c5d711418c5d31a7ebe710decc6e

commit 5ef608f36493c5d711418c5d31a7ebe710decc6e
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon Oct 16 13:19:26 2023 +0000

    Add SCM_SECURITY, SCM_PIDFD to bits/socket.h
    
    Linux 6.5 adds a constant SCM_PIDFD (recall that the non-uapi
    linux/socket.h, where this constant is added, is in fact a header
    providing many constants that are part of the kernel/userspace
    interface).  This shows up that SCM_SECURITY, from the same set of
    definitions and added in Linux 2.6.17, is also missing from glibc,
    although glibc has the first two constants from this set, SCM_RIGHTS
    and SCM_CREDENTIALS; add both missing constants to glibc.
    
    Tested for x86_64.

Diff:
---
 sysdeps/unix/sysv/linux/bits/socket.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/bits/socket.h b/sysdeps/unix/sysv/linux/bits/socket.h
index 57b05715be..c19814c5cf 100644
--- a/sysdeps/unix/sysv/linux/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/bits/socket.h
@@ -367,6 +367,10 @@ enum
 #ifdef __USE_GNU
     , SCM_CREDENTIALS = 0x02	/* Credentials passing.  */
 # define SCM_CREDENTIALS SCM_CREDENTIALS
+    , SCM_SECURITY = 0x03	/* Security label.  */
+# define SCM_SECURITY SCM_SECURITY
+    , SCM_PIDFD = 0x04		/* Pidfd.  */
+# define SCM_PIDFD SCM_PIDFD
 #endif
   };