[PATCH 03/17] Consolidate Linux msgctl implementation

[Adhemerval Zanella <adhemerval dot zanella at linaro dot org>]

This patch consolidates the msgctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/msgctl.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
	oldmsgctl.
	* sysdeps/unix/sysv/linux/alpha/msgctl.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/msgctl.c: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/msgctl.c: Likewise.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list (oldmsgctl): Remove.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgctl):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/msgctl.c: Use default
	implementation.
	* sysdeps/unix/sysv/linux/msgctl.c (__new_msgctl): Use msgctl syscall
	if defined.
---
 ChangeLog                                          | 17 ++++++++
 sysdeps/unix/sysv/linux/alpha/Makefile             |  2 +-
 sysdeps/unix/sysv/linux/alpha/msgctl.c             |  1 -
 sysdeps/unix/sysv/linux/alpha/syscalls.list        |  1 -
 sysdeps/unix/sysv/linux/arm/msgctl.c               | 33 ----------------
 sysdeps/unix/sysv/linux/generic/syscalls.list      |  1 -
 sysdeps/unix/sysv/linux/hppa/syscalls.list         |  1 -
 sysdeps/unix/sysv/linux/ia64/syscalls.list         |  1 -
 sysdeps/unix/sysv/linux/microblaze/msgctl.c        |  1 -
 sysdeps/unix/sysv/linux/mips/mips64/msgctl.c       | 17 +++-----
 sysdeps/unix/sysv/linux/msgctl.c                   | 45 +++++++++++-----------
 sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list |  1 -
 sysdeps/unix/sysv/linux/x86_64/syscalls.list       |  1 -
 13 files changed, 46 insertions(+), 76 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/alpha/msgctl.c
 delete mode 100644 sysdeps/unix/sysv/linux/arm/msgctl.c
 delete mode 100644 sysdeps/unix/sysv/linux/microblaze/msgctl.c

diff --git a/sysdeps/unix/sysv/linux/alpha/Makefile b/sysdeps/unix/sysv/linux/alpha/Makefile
index 45941b0..c24dc2e 100644
--- a/sysdeps/unix/sysv/linux/alpha/Makefile
+++ b/sysdeps/unix/sysv/linux/alpha/Makefile
@@ -18,7 +18,7 @@ sysdep_routines += osf_select osf_gettimeofday osf_settimeofday \
 		   osf_getrusage osf_wait4
 
 # Support old ipc control
-sysdep_routines += oldmsgctl oldsemctl oldshmctl
+sysdep_routines += oldsemctl oldshmctl
 
 CFLAGS-ioperm.c = -Wa,-mev6
 endif
diff --git a/sysdeps/unix/sysv/linux/alpha/msgctl.c b/sysdeps/unix/sysv/linux/alpha/msgctl.c
deleted file mode 100644
index d65a5b9..0000000
--- a/sysdeps/unix/sysv/linux/alpha/msgctl.c
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/unix/sysv/linux/arm/msgctl.c>
diff --git a/sysdeps/unix/sysv/linux/alpha/syscalls.list b/sysdeps/unix/sysv/linux/alpha/syscalls.list
index 0c9efcb..f82c9da 100644
--- a/sysdeps/unix/sysv/linux/alpha/syscalls.list
+++ b/sysdeps/unix/sysv/linux/alpha/syscalls.list
@@ -1,6 +1,5 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
-oldmsgctl	EXTRA	msgctl		i:iip	__old_msgctl	msgctl@GLIBC_2.0
 msgget		-	msgget		i:ii	__msgget	msgget
 msgrcv		-	msgrcv		Ci:ibnii __msgrcv	msgrcv
 msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
diff --git a/sysdeps/unix/sysv/linux/arm/msgctl.c b/sysdeps/unix/sysv/linux/arm/msgctl.c
deleted file mode 100644
index 83c6744..0000000
--- a/sysdeps/unix/sysv/linux/arm/msgctl.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/* Copyright (C) 1995-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <errno.h>
-#include <sys/msg.h>
-#include <ipc_priv.h>
-#include <sysdep.h>
-#include <sys/syscall.h>
-
-
-int
-__new_msgctl (int msqid, int cmd, struct msqid_ds *buf)
-{
-  return INLINE_SYSCALL (msgctl, 3, msqid, cmd | __IPC_64, buf);
-}
-
-#include <shlib-compat.h>
-versioned_symbol (libc, __new_msgctl, msgctl, GLIBC_2_2);
diff --git a/sysdeps/unix/sysv/linux/generic/syscalls.list b/sysdeps/unix/sysv/linux/generic/syscalls.list
index 5993ab4..dea452b 100644
--- a/sysdeps/unix/sysv/linux/generic/syscalls.list
+++ b/sysdeps/unix/sysv/linux/generic/syscalls.list
@@ -2,7 +2,6 @@
 
 # SysV APIs
 msgget		-	msgget		i:ii	__msgget	msgget
-msgctl		-	msgctl		i:iip	__msgctl	msgctl
 msgrcv		-	msgrcv		Ci:ibnii __msgrcv	msgrcv
 msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
 semget		-	semget		i:iii	__semget	semget
diff --git a/sysdeps/unix/sysv/linux/hppa/syscalls.list b/sysdeps/unix/sysv/linux/hppa/syscalls.list
index a95c3dd..ead0e99 100644
--- a/sysdeps/unix/sysv/linux/hppa/syscalls.list
+++ b/sysdeps/unix/sysv/linux/hppa/syscalls.list
@@ -1,7 +1,6 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
 # semaphore and shm system calls
-msgctl		-	msgctl		i:iip	__msgctl	msgctl
 msgget		-	msgget		i:ii	__msgget	msgget
 msgrcv		-	msgrcv		Ci:ibnii __msgrcv	msgrcv
 msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
diff --git a/sysdeps/unix/sysv/linux/ia64/syscalls.list b/sysdeps/unix/sysv/linux/ia64/syscalls.list
index 68b6c9a..8a66ca9 100644
--- a/sysdeps/unix/sysv/linux/ia64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/ia64/syscalls.list
@@ -5,7 +5,6 @@ umount2		-	umount		2	__umount2	umount2
 getpriority	-	getpriority	i:ii	__getpriority	getpriority
 
 # semaphore and shm system calls
-msgctl		-	msgctl		i:iip	__msgctl	msgctl
 msgget		-	msgget		i:ii	__msgget	msgget
 msgrcv		-	msgrcv		Ci:ibnii __msgrcv	msgrcv
 msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
diff --git a/sysdeps/unix/sysv/linux/microblaze/msgctl.c b/sysdeps/unix/sysv/linux/microblaze/msgctl.c
deleted file mode 100644
index d65a5b9..0000000
--- a/sysdeps/unix/sysv/linux/microblaze/msgctl.c
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/unix/sysv/linux/arm/msgctl.c>
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/msgctl.c b/sysdeps/unix/sysv/linux/mips/mips64/msgctl.c
index c4dc7ff..928c3dc 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/msgctl.c
+++ b/sysdeps/unix/sysv/linux/mips/mips64/msgctl.c
@@ -15,18 +15,11 @@
    License along with the GNU C Library.  If not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <sys/msg.h>
-#include <ipc_priv.h>
-#include <sysdep.h>
+#include <shlib-compat.h>
 
-int __msgctl (int msqid, int cmd, struct msqid_ds *buf);
+#undef SHLIB_COMPAT
+#define SHLIB_COMPAT(a, b, c) 0
 
-int
-__msgctl (int msqid, int cmd, struct msqid_ds *buf)
-{
-  return INLINE_SYSCALL (msgctl, 3, msqid, cmd | __IPC_64, buf);
-}
+#define DEFAULT_VERSION GLIBC_2_0
 
-#include <shlib-compat.h>
-versioned_symbol (libc, __msgctl, msgctl, GLIBC_2_0);
+#include <sysdeps/unix/sysv/linux/msgctl.c>
diff --git a/sysdeps/unix/sysv/linux/msgctl.c b/sysdeps/unix/sysv/linux/msgctl.c
index e48fbb3..45bf350 100644
--- a/sysdeps/unix/sysv/linux/msgctl.c
+++ b/sysdeps/unix/sysv/linux/msgctl.c
@@ -16,17 +16,30 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
 #include <sys/msg.h>
 #include <ipc_priv.h>
-
 #include <sysdep.h>
-#include <string.h>
-#include <sys/syscall.h>
 #include <shlib-compat.h>
+#include <errno.h>
+
+#ifndef DEFAULT_VERSION
+# define DEFAULT_VERSION GLIBC_2_2
+#endif
+
+int
+__new_msgctl (int msqid, int cmd, struct msqid_ds *buf)
+{
+#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  return INLINE_SYSCALL_CALL (msgctl, msqid, cmd | __IPC_64, buf);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_msgctl, msqid, cmd | __IPC_64, 0,
+			      buf);
+#endif
+}
+versioned_symbol (libc, __new_msgctl, msgctl, DEFAULT_VERSION);
 
-#include <kernel-features.h>
 
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
 struct __old_msqid_ds
 {
   struct __old_ipc_perm msg_perm;	/* structure describing operation permission */
@@ -44,27 +57,15 @@ struct __old_msqid_ds
   __ipc_pid_t msg_lrpid;		/* pid of last msgrcv() */
 };
 
-/* Allows to control internal state and destruction of message queue
-   objects.  */
-#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
-int __old_msgctl (int, int, struct __old_msqid_ds *);
-#endif
-int __new_msgctl (int, int, struct msqid_ds *);
-
-#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
 int
 attribute_compat_text_section
 __old_msgctl (int msqid, int cmd, struct __old_msqid_ds *buf)
 {
-  return INLINE_SYSCALL (ipc, 5, IPCOP_msgctl, msqid, cmd, 0, buf);
+#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+  return INLINE_SYSCALL_CALL (msgctl, msqid, cmd | __IPC_64, buf);
+#else
+  return INLINE_SYSCALL_CALL (ipc, IPCOP_msgctl, msqid, cmd, 0, buf);
+#endif
 }
 compat_symbol (libc, __old_msgctl, msgctl, GLIBC_2_0);
 #endif
-
-int
-__new_msgctl (int msqid, int cmd, struct msqid_ds *buf)
-{
-  return INLINE_SYSCALL (ipc, 5, IPCOP_msgctl, msqid, cmd | __IPC_64, 0, buf);
-}
-
-versioned_symbol (libc, __new_msgctl, msgctl, GLIBC_2_2);
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list b/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
index 9f03d26..808cbbb 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list
@@ -1,7 +1,6 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
 # semaphore and shm system calls
-msgctl		-	msgctl		i:iip	__msgctl	msgctl
 msgget		-	msgget		i:ii	__msgget	msgget
 msgrcv		-	msgrcv		Ci:ibnii __msgrcv	msgrcv
 msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscalls.list b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
index 8aed2f4..4d19d75 100644
--- a/sysdeps/unix/sysv/linux/x86_64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
@@ -2,7 +2,6 @@
 
 arch_prctl	EXTRA	arch_prctl	i:ii	__arch_prctl	arch_prctl
 modify_ldt	EXTRA	modify_ldt	i:ipi	__modify_ldt	modify_ldt
-msgctl		-	msgctl		i:iip	__msgctl	msgctl
 msgget		-	msgget		i:ii	__msgget	msgget
 msgrcv		-	msgrcv		Ci:ibnii __msgrcv	msgrcv
 msgsnd		-	msgsnd		Ci:ibni	__msgsnd	msgsnd
-- 
2.7.4