syscall_wrappers: move memfd_create()

src/lxc/ringbuf.c

@@ -32,6 +32,7 @@
 
 #include "config.h"
 #include "ringbuf.h"
+#include "syscall_wrappers.h"
 #include "utils.h"
 
 int lxc_ringbuf_create(struct lxc_ringbuf *buf, size_t size)

src/lxc/syscall_wrappers.h

@@ -32,6 +32,10 @@
 
 #include "config.h"
 
+#ifdef HAVE_LINUX_MEMFD_H
+#include <linux/memfd.h>
+#endif
+
 typedef int32_t key_serial_t;
 
 #if !HAVE_KEYCTL
@@ -48,6 +52,50 @@ static inline long __keyctl(int cmd, unsigned long arg2, unsigned long arg3,
 #define keyctl __keyctl
 #endif
 
+#ifndef HAVE_MEMFD_CREATE
+static inline int memfd_create(const char *name, unsigned int flags) {
+	#ifndef __NR_memfd_create
+		#if defined __i386__
+			#define __NR_memfd_create 356
+		#elif defined __x86_64__
+			#define __NR_memfd_create 319
+		#elif defined __arm__
+			#define __NR_memfd_create 385
+		#elif defined __aarch64__
+			#define __NR_memfd_create 279
+		#elif defined __s390__
+			#define __NR_memfd_create 350
+		#elif defined __powerpc__
+			#define __NR_memfd_create 360
+		#elif defined __sparc__
+			#define __NR_memfd_create 348
+		#elif defined __blackfin__
+			#define __NR_memfd_create 390
+		#elif defined __ia64__
+			#define __NR_memfd_create 1340
+		#elif defined _MIPS_SIM
+			#if _MIPS_SIM == _MIPS_SIM_ABI32
+				#define __NR_memfd_create 4354
+			#endif
+			#if _MIPS_SIM == _MIPS_SIM_NABI32
+				#define __NR_memfd_create 6318
+			#endif
+			#if _MIPS_SIM == _MIPS_SIM_ABI64
+				#define __NR_memfd_create 5314
+			#endif
+		#endif
+	#endif
+	#ifdef __NR_memfd_create
+	return syscall(__NR_memfd_create, name, flags);
+	#else
+	errno = ENOSYS;
+	return -1;
+	#endif
+}
+#else
+extern int memfd_create(const char *name, unsigned int flags);
+#endif
+
 #if !HAVE_PIVOT_ROOT
 static int pivot_root(const char *new_root, const char *put_old)
 {

src/lxc/utils.h

@@ -43,10 +43,6 @@
 #include "raw_syscalls.h"
 #include "string_utils.h"
 
-#ifdef HAVE_LINUX_MEMFD_H
-#include <linux/memfd.h>
-#endif
-
 /* returns 1 on success, 0 if there were any failures */
 extern int lxc_rmdir_onedev(const char *path, const char *exclude);
 extern int get_u16(unsigned short *val, const char *arg, int base);
@@ -199,50 +195,6 @@ static inline int signalfd(int fd, const sigset_t *mask, int flags)
 }
 #endif
 
-#ifndef HAVE_MEMFD_CREATE
-static inline int memfd_create(const char *name, unsigned int flags) {
-	#ifndef __NR_memfd_create
-		#if defined __i386__
-			#define __NR_memfd_create 356
-		#elif defined __x86_64__
-			#define __NR_memfd_create 319
-		#elif defined __arm__
-			#define __NR_memfd_create 385
-		#elif defined __aarch64__
-			#define __NR_memfd_create 279
-		#elif defined __s390__
-			#define __NR_memfd_create 350
-		#elif defined __powerpc__
-			#define __NR_memfd_create 360
-		#elif defined __sparc__
-			#define __NR_memfd_create 348
-		#elif defined __blackfin__
-			#define __NR_memfd_create 390
-		#elif defined __ia64__
-			#define __NR_memfd_create 1340
-		#elif defined _MIPS_SIM
-			#if _MIPS_SIM == _MIPS_SIM_ABI32
-				#define __NR_memfd_create 4354
-			#endif
-			#if _MIPS_SIM == _MIPS_SIM_NABI32
-				#define __NR_memfd_create 6318
-			#endif
-			#if _MIPS_SIM == _MIPS_SIM_ABI64
-				#define __NR_memfd_create 5314
-			#endif
-		#endif
-	#endif
-	#ifdef __NR_memfd_create
-	return syscall(__NR_memfd_create, name, flags);
-	#else
-	errno = ENOSYS;
-	return -1;
-	#endif
-}
-#else
-extern int memfd_create(const char *name, unsigned int flags);
-#endif
-
 static inline int lxc_set_cloexec(int fd)
 {
 	return fcntl(fd, F_SETFD, FD_CLOEXEC);