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From 8a73a967e18c55199785bae0f22dc94d9b2f8985 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbrodkorb@conet.de>
Date: Tue, 27 Nov 2018 15:41:37 +0100
Subject: [PATCH] statfs.h: sync generic header with glibc
Fix issues with aarch64 and df with mismatching header between kernel
and libc.
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
---
.../linux/common-generic/bits/statfs.h | 84 +++++++++----------
libc/sysdeps/linux/common/fstatfs.c | 9 --
libc/sysdeps/linux/common/statfs.c | 10 ---
3 files changed, 40 insertions(+), 63 deletions(-)
diff --git a/libc/sysdeps/linux/common-generic/bits/statfs.h b/libc/sysdeps/linux/common-generic/bits/statfs.h
index a2767b49a..23519a57e 100644
--- a/libc/sysdeps/linux/common-generic/bits/statfs.h
+++ b/libc/sysdeps/linux/common-generic/bits/statfs.h
@@ -11,65 +11,61 @@
#include <endian.h>
#include <bits/align64bit.h>
#include <bits/types.h>
+#include <bits/wordsize.h>
+/* 64-bit libc uses the kernel's 'struct statfs', accessed via the
+ statfs() syscall; 32-bit libc uses the kernel's 'struct statfs64'
+ and accesses it via the statfs64() syscall. All the various
+ APIs offered by libc use the kernel shape for their struct statfs
+ structure; the only difference is that 32-bit programs not
+ using __USE_FILE_OFFSET64 only see the low 32 bits of some
+ of the fields (the __fsblkcnt_t and __fsfilcnt_t fields). */
+
+#if defined __USE_FILE_OFFSET64
+# define __field64(type, type64, name) type64 name
+#elif __WORDSIZE == 64
+# define __field64(type, type64, name) type name
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+# define __field64(type, type64, name) \
+ type name __attribute__((__aligned__ (__alignof__ (type64)))); int __##name##_pad
+#else
+# define __field64(type, type64, name) \
+ int __##name##_pad __attribute__((__aligned__ (__alignof__ (type64)))); type name
+#endif
struct statfs
{
- __U32_TYPE f_type;
- __U32_TYPE f_bsize;
-#ifndef __USE_FILE_OFFSET64
-# if __BYTE_ORDER == __LITTLE_ENDIAN
- __U32_TYPE f_blocks;
- __U32_TYPE __pad1;
- __U32_TYPE f_bfree;
- __U32_TYPE __pad2;
- __U32_TYPE f_bavail;
- __U32_TYPE __pad3;
- __U32_TYPE f_files;
- __U32_TYPE __pad4;
- __U32_TYPE f_ffree;
- __U32_TYPE __pad5;
-# else
- __U32_TYPE __pad1;
- __U32_TYPE f_blocks;
- __U32_TYPE __pad2;
- __U32_TYPE f_bfree;
- __U32_TYPE __pad3;
- __U32_TYPE f_bavail;
- __U32_TYPE __pad4;
- __U32_TYPE f_files;
- __U32_TYPE __pad5;
- __U32_TYPE f_ffree;
-# endif /* __LITTLE_ENDIAN */
-#else
- __U64_TYPE f_blocks;
- __U64_TYPE f_bfree;
- __U64_TYPE f_bavail;
- __U64_TYPE f_files;
- __U64_TYPE f_ffree;
-#endif /* __USE_FILE_OFFSET64 */
+ __SWORD_TYPE f_type;
+ __SWORD_TYPE f_bsize;
+ __field64(__fsblkcnt_t, __fsblkcnt64_t, f_blocks);
+ __field64(__fsblkcnt_t, __fsblkcnt64_t, f_bfree);
+ __field64(__fsblkcnt_t, __fsblkcnt64_t, f_bavail);
+ __field64(__fsfilcnt_t, __fsfilcnt64_t, f_files);
+ __field64(__fsfilcnt_t, __fsfilcnt64_t, f_ffree);
__fsid_t f_fsid;
- __U32_TYPE f_namelen;
- __U32_TYPE f_frsize;
- __U32_TYPE f_flags;
- __U32_TYPE f_spare[4];
- } __ARCH_64BIT_ALIGNMENT__;
+ __SWORD_TYPE f_namelen;
+ __SWORD_TYPE f_frsize;
+ __SWORD_TYPE f_flags;
+ __SWORD_TYPE f_spare[4];
+ };
+
+#undef __field64
#ifdef __USE_LARGEFILE64
struct statfs64
{
- __U32_TYPE f_type;
- __U32_TYPE f_bsize;
+ __SWORD_TYPE f_type;
+ __SWORD_TYPE f_bsize;
__U64_TYPE f_blocks;
__U64_TYPE f_bfree;
__U64_TYPE f_bavail;
__U64_TYPE f_files;
__U64_TYPE f_ffree;
__fsid_t f_fsid;
- __U32_TYPE f_namelen;
- __U32_TYPE f_frsize;
- __U32_TYPE f_flags;
- __U32_TYPE f_spare[4];
+ __SWORD_TYPE f_namelen;
+ __SWORD_TYPE f_frsize;
+ __SWORD_TYPE f_flags;
+ __SWORD_TYPE f_spare[4];
};
#endif
diff --git a/libc/sysdeps/linux/common/fstatfs.c b/libc/sysdeps/linux/common/fstatfs.c
index fcb0820eb..0b2709ce3 100644
--- a/libc/sysdeps/linux/common/fstatfs.c
+++ b/libc/sysdeps/linux/common/fstatfs.c
@@ -30,15 +30,6 @@ _syscall2(int, __libc_fstatfs, int, fd, struct statfs *, buf)
int __libc_fstatfs (int __fildes, struct statfs *__buf)
{
int err = INLINE_SYSCALL(fstatfs64, 3, __fildes, sizeof(*__buf), __buf);
-
- if (err == 0) {
- /* Did we overflow? */
- if (__buf->__pad1 || __buf->__pad2 || __buf->__pad3 ||
- __buf->__pad4 || __buf->__pad5) {
- __set_errno(EOVERFLOW);
- return -1;
- }
- }
return err;
};
/* Redefined fstatfs because we need it for backwards compatibility */
diff --git a/libc/sysdeps/linux/common/statfs.c b/libc/sysdeps/linux/common/statfs.c
index ab9ec0e56..2990ff3e2 100644
--- a/libc/sysdeps/linux/common/statfs.c
+++ b/libc/sysdeps/linux/common/statfs.c
@@ -18,16 +18,6 @@ extern __typeof(statfs) __libc_statfs attribute_hidden;
int __libc_statfs(const char *path, struct statfs *buf)
{
int err = INLINE_SYSCALL(statfs64, 3, path, sizeof(*buf), buf);
-
- if (err == 0) {
- /* Did we overflow? */
- if (buf->__pad1 || buf->__pad2 || buf->__pad3 ||
- buf->__pad4 || buf->__pad5) {
- __set_errno(EOVERFLOW);
- return -1;
- }
- }
-
return err;
}
# if defined __UCLIBC_LINUX_SPECIFIC__ || defined __UCLIBC_HAS_THREADS_NATIVE__
--
2.19.1
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