[LTP] [RFC PATCH 1/1] lapi: Add sysinfo.h to fix build with MUSL libc

Petr Vorel
2020-10-01T23:12:56Z

The reason is to avoid indirect <linux/sysinfo.h> include when using
some UAPI headers: <linux/netlink.h> or others -> <linux/kernel.h>
-> <linux/sysinfo.h>

This indirect include causes on MUSL redefinition of struct sysinfo when
included both <sys/sysinfo.h> and some of UAPI headers:

In file included from x86_64-buildroot-linux-musl/sysroot/usr/include/linux/kernel.h:5,
from x86_64-buildroot-linux-musl/sysroot/usr/include/linux/netlink.h:5,
from ../include/tst_netlink.h:14,
from tst_crypto.c:13:
x86_64-buildroot-linux-musl/sysroot/usr/include/linux/sysinfo.h:8:8: error: redefinition of ?struct sysinfo?
struct sysinfo {
^~~~~~~
In file included from ../include/tst_safe_macros.h:15,
from ../include/tst_test.h:93,
from tst_crypto.c:11:
x86_64-buildroot-linux-musl/sysroot/usr/include/sys/sysinfo.h:10:8: note: originally defined here

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
Hi,

another MUSL specific workaround. I'm ok if we don't want to accept it.

I also sent patch to kernel, but don't think it will be accepted.

https://lore.kernel.org/linux-api/20201001211942.13336-1-petr.vorel@gmail.com/T/#me9d7d385157ec5f6288bae77d738a96c12ab8ca7

Kind regards,
Petr

include/lapi/sysinfo.h | 22 +++++++++++++++++++
include/tst_safe_macros.h | 2 +-
lib/safe_macros.c | 2 +-
lib/tst_memutils.c | 2 +-
testcases/kernel/mem/mtest01/mtest01.c | 2 +-
testcases/kernel/syscalls/madvise/madvise06.c | 2 +-
testcases/kernel/syscalls/sysinfo/sysinfo01.c | 2 +-
testcases/kernel/syscalls/sysinfo/sysinfo02.c | 2 +-
testcases/kernel/syscalls/sysinfo/sysinfo03.c | 2 +-
9 files changed, 30 insertions(+), 8 deletions(-)
create mode 100644 include/lapi/sysinfo.h

diff --git a/include/lapi/sysinfo.h b/include/lapi/sysinfo.h
new file mode 100644
index 000000000..d0e0e93d7
--- /dev/null
+++ b/include/lapi/sysinfo.h
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2020 Petr Vorel <petr.vorel@gmail.com>
+ */
+
+#ifndef SYSINFO_H__
+
+/*
+ * Don't use <sys/sysinfo.h> as it breaks build MUSL toolchain.
+ * Use <linux/sysinfo.h> instead.
+ *
+ * Some kernel UAPI headers do indirect <linux/sysinfo.h> include:
+ * <linux/netlink.h> or others -> <linux/kernel.h> -> <linux/sysinfo.h>
+ *
+ * This indirect include causes on MUSL redefinition of struct sysinfo when
+ * included both <sys/sysinfo.h> and some of UAPI headers:
+ */
+#include <linux/sysinfo.h>
+
+#define SYSINFO_H__
+
+#endif /* SYSINFO_H__ */
diff --git a/include/tst_safe_macros.h b/include/tst_safe_macros.h
index 053c3bcf9..61ea2076d 100644
--- a/include/tst_safe_macros.h
+++ b/include/tst_safe_macros.h
@@ -12,7 +12,7 @@
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/vfs.h>
-#include <sys/sysinfo.h>
+#include <linux/sysinfo.h>
#include <fcntl.h>
#include <libgen.h>
#include <signal.h>
diff --git a/lib/safe_macros.c b/lib/safe_macros.c
index 4f48d7529..d8ee03dae 100644
--- a/lib/safe_macros.c
+++ b/lib/safe_macros.c
@@ -11,7 +11,6 @@
#include <sys/wait.h>
#include <sys/mount.h>
#include <sys/xattr.h>
-#include <sys/sysinfo.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
@@ -23,6 +22,7 @@
#include <malloc.h>
#include "test.h"
#include "safe_macros.h"
+#include "lapi/sysinfo.h"

char *safe_basename(const char *file, const int lineno,
void (*cleanup_fn) (void), char *path)
diff --git a/lib/tst_memutils.c b/lib/tst_memutils.c
index f134d90c9..647db951e 100644
--- a/lib/tst_memutils.c
+++ b/lib/tst_memutils.c
@@ -5,11 +5,11 @@

#include <unistd.h>
#include <limits.h>
-#include <sys/sysinfo.h>
#include <stdlib.h>

#define TST_NO_DEFAULT_MAIN
#include "tst_test.h"
+#include "lapi/sysinfo.h"

#define BLOCKSIZE (16 * 1024 * 1024)

diff --git a/testcases/kernel/mem/mtest01/mtest01.c b/testcases/kernel/mem/mtest01/mtest01.c
index f08d3943f..9b4d856f8 100644
--- a/testcases/kernel/mem/mtest01/mtest01.c
+++ b/testcases/kernel/mem/mtest01/mtest01.c
@@ -20,7 +20,6 @@
*/

#include <sys/types.h>
-#include <sys/sysinfo.h>
#include <sys/wait.h>
#include <limits.h>
#include <signal.h>
@@ -29,6 +28,7 @@
#include <unistd.h>

#include "lapi/abisize.h"
+#include "lapi/sysinfo.h"
#include "tst_test.h"

#define FIVE_HUNDRED_MB (500ULL*1024*1024)
diff --git a/testcases/kernel/syscalls/madvise/madvise06.c b/testcases/kernel/syscalls/madvise/madvise06.c
index f76f3f6aa..b2613670b 100644
--- a/testcases/kernel/syscalls/madvise/madvise06.c
+++ b/testcases/kernel/syscalls/madvise/madvise06.c
@@ -24,8 +24,8 @@
#include <errno.h>
#include <stdio.h>
#include <sys/mount.h>
-#include <sys/sysinfo.h>
#include "tst_test.h"
+#include "lapi/sysinfo.h"

#define CHUNK_SZ (400*1024*1024L)
#define CHUNK_PAGES (CHUNK_SZ / pg_sz)
diff --git a/testcases/kernel/syscalls/sysinfo/sysinfo01.c b/testcases/kernel/syscalls/sysinfo/sysinfo01.c
index 2ea44a2be..a95066bf5 100644
--- a/testcases/kernel/syscalls/sysinfo/sysinfo01.c
+++ b/testcases/kernel/syscalls/sysinfo/sysinfo01.c
@@ -69,9 +69,9 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/signal.h>
-#include <sys/sysinfo.h>

#include "test.h"
+#include "lapi/sysinfo.h"

void setup();
void cleanup();
diff --git a/testcases/kernel/syscalls/sysinfo/sysinfo02.c b/testcases/kernel/syscalls/sysinfo/sysinfo02.c
index 678b8f1d3..5ce65d20e 100644
--- a/testcases/kernel/syscalls/sysinfo/sysinfo02.c
+++ b/testcases/kernel/syscalls/sysinfo/sysinfo02.c
@@ -65,10 +65,10 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/signal.h>
-#include <sys/sysinfo.h>
#include <stdint.h>

#include "test.h"
+#include "lapi/sysinfo.h"

#define INVALID_ADDRESS ((uintptr_t)-1)

diff --git a/testcases/kernel/syscalls/sysinfo/sysinfo03.c b/testcases/kernel/syscalls/sysinfo/sysinfo03.c
index af7cb6421..3b61a05b1 100644
--- a/testcases/kernel/syscalls/sysinfo/sysinfo03.c
+++ b/testcases/kernel/syscalls/sysinfo/sysinfo03.c
@@ -13,9 +13,9 @@

*/

-#include <sys/sysinfo.h>
#include "lapi/namespaces_constants.h"
#include "lapi/posix_clocks.h"
+#include "lapi/sysinfo.h"
#include "tst_test.h"

static int offsets[] = {
--
2.28.0