An old version of asm-generic syscall ABI (e.g. ARC 2013) provided
fstat[at]64 syscalls for implementing the stat family.
These sycalls are passthru (no interworking/itemized-copy needed
between kernel and user structs since they are binary comaptible).
However with switch to 64-bit time_t the compatibily goes away so we
need explicit interworking. Luckily such code already exists albeit it
uses the statx syscall.
So this patch reworks the asm-generic based stat functions to use the
statx code-path if the arch so desires. It essentially reworks the commit
6bbfc5c09fc5b5e3 ("Add statx conditionals for wordsize-32 *xstat.c")
This will be used by ARC port for 64-bit time_t. But it has no real
bearing on 64-bit and can just be independently opted-in by an arch port
provided the ABI supports it.
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
---
sysdeps/unix/sysv/linux/fxstat64.c | 8 ++++----
sysdeps/unix/sysv/linux/fxstatat64.c | 6 +++---
sysdeps/unix/sysv/linux/generic/kernel_stat.h | 7 +++++++
sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c | 6 +++---
sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c | 6 +++---
sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c | 10 +++++-----
sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c | 8 ++++----
sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c | 6 +++---
sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c | 6 +++---
sysdeps/unix/sysv/linux/statx_cp.c | 2 +-
10 files changed, 36 insertions(+), 29 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/fxstat64.c b/sysdeps/unix/sysv/linux/fxstat64.c
index 9133a0a29b8e..d4da85f7949c 100644
--- a/sysdeps/unix/sysv/linux/fxstat64.c
+++ b/sysdeps/unix/sysv/linux/fxstat64.c
@@ -33,15 +33,15 @@ int
___fxstat64 (int vers, int fd, struct stat64 *buf)
{
int result;
-#ifdef __NR_fstat64
- result = INLINE_SYSCALL (fstat64, 2, fd, buf);
-#else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
result = INLINE_SYSCALL (statx, 5, fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS,
&tmp);
if (result == 0)
__cp_stat64_statx (buf, &tmp);
-#endif
+# else
+ result = INLINE_SYSCALL (fstat64, 2, fd, buf);
+# endif
return result;
}
diff --git a/sysdeps/unix/sysv/linux/fxstatat64.c b/sysdeps/unix/sysv/linux/fxstatat64.c
index e24b456604ff..eb59c8be845f 100644
--- a/sysdeps/unix/sysv/linux/fxstatat64.c
+++ b/sysdeps/unix/sysv/linux/fxstatat64.c
@@ -38,15 +38,15 @@ __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
int result;
-#ifdef __NR_fstatat64
- result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, st, flag);
-#else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstatat64)
struct statx tmp;
result = INTERNAL_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
STATX_BASIC_STATS, &tmp);
if (result == 0)
__cp_stat64_statx (st, &tmp);
+#else
+ result = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, st, flag);
#endif
if (!__glibc_likely (INTERNAL_SYSCALL_ERROR_P (result)))
return 0;
diff --git a/sysdeps/unix/sysv/linux/generic/kernel_stat.h b/sysdeps/unix/sysv/linux/generic/kernel_stat.h
index 2eed3596c0ed..916deb7ed8c1 100644
--- a/sysdeps/unix/sysv/linux/generic/kernel_stat.h
+++ b/sysdeps/unix/sysv/linux/generic/kernel_stat.h
@@ -28,3 +28,10 @@
#endif
#define STATFS_IS_STATFS64 0
+
+/* Ports define to 1 when glibc struct stat64 is not compatible with
+ kernel stat64. This forces use of statx syscall (and explicit interworking)
+ even when fstat64 syscall is available. For asm-generic ABI this happened
+ with switch to 64-bit time_t. */
+
+# undef STAT64_IS_NOT_KERNEL_STAT64
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c
index 850450e1e8a1..8ab11c62d1b3 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c
+++ b/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c
@@ -36,14 +36,14 @@ __fxstat (int vers, int fd, struct stat *buf)
{
if (vers == _STAT_VER_KERNEL)
{
-# ifdef __NR_fstat64
- int rc = INLINE_SYSCALL (fstat64, 2, fd, buf);
-# else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
int rc = INLINE_SYSCALL (statx, 5, fd, "", AT_EMPTY_PATH,
STATX_BASIC_STATS, &tmp);
if (rc == 0)
__cp_stat64_statx ((struct stat64 *)buf, &tmp);
+# else
+ int rc = INLINE_SYSCALL (fstat64, 2, fd, buf);
# endif
return rc ?: stat_overflow (buf);
}
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c
index 8df65ebea084..19446a6cd917 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c
+++ b/sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c
@@ -36,15 +36,15 @@ __fxstatat (int vers, int fd, const char *file, struct stat *buf, int flag)
{
if (vers == _STAT_VER_KERNEL)
{
-# ifdef __NR_fstatat64
- int rc = INLINE_SYSCALL (fstatat64, 4, fd, file, buf, flag);
-# else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
int rc = INLINE_SYSCALL (statx, 5, fd, file,
AT_NO_AUTOMOUNT | flag,
STATX_BASIC_STATS, &tmp);
if (rc == 0)
__cp_stat64_statx ((struct stat64 *)buf, &tmp);
+# else
+ int rc = INLINE_SYSCALL (fstatat64, 4, fd, file, buf, flag);
# endif
return rc ?: stat_overflow (buf);
}
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c
index bd02631d68cd..63fba924d14e 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c
+++ b/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c
@@ -35,17 +35,17 @@ __lxstat (int vers, const char *name, struct stat *buf)
{
if (vers == _STAT_VER_KERNEL)
{
-#ifdef __NR_fstatat64
- int rc = INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf,
- AT_SYMLINK_NOFOLLOW);
-#else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, name,
AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
STATX_BASIC_STATS, &tmp);
if (rc == 0)
__cp_stat64_statx ((struct stat64 *)buf, &tmp);
-#endif
+# else
+ int rc = INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf,
+ AT_SYMLINK_NOFOLLOW);
+# endif
return rc ?: stat_overflow (buf);
}
errno = EINVAL;
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c
index 3eab0a184751..5f8361361e04 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c
+++ b/sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c
@@ -40,10 +40,7 @@ __lxstat64 (int vers, const char *name, struct stat64 *buf)
{
if (vers == _STAT_VER_KERNEL)
{
-#ifdef __NR_fstatat64
- return INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf,
- AT_SYMLINK_NOFOLLOW);
-#else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, name,
AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
@@ -51,6 +48,9 @@ __lxstat64 (int vers, const char *name, struct stat64 *buf)
if (rc == 0)
__cp_stat64_statx (buf, &tmp);
return rc;
+#else
+ return INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf,
+ AT_SYMLINK_NOFOLLOW);
#endif
}
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c
index a4a921c1ea6c..43b3e0b7b638 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c
+++ b/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c
@@ -35,14 +35,14 @@ __xstat (int vers, const char *name, struct stat *buf)
{
if (vers == _STAT_VER_KERNEL)
{
-# ifdef __NR_fstatat64
- int rc = INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf, 0);
-# else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, name, AT_NO_AUTOMOUNT,
STATX_BASIC_STATS, &tmp);
if (rc == 0)
__cp_stat64_statx ((struct stat64 *)buf, &tmp);
+# else
+ int rc = INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf, 0);
# endif
return rc ?: stat_overflow (buf);
}
diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c
index 0848b5a4b4b1..e999bd2ffad5 100644
--- a/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c
+++ b/sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c
@@ -40,15 +40,15 @@ __xstat64 (int vers, const char *name, struct stat64 *buf)
{
if (vers == _STAT_VER_KERNEL)
{
-#ifdef __NR_fstatat64
- return INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf, 0);
-#else
+# if defined(STAT64_IS_NOT_KERNEL_STAT64) || !defined(__NR_fstat64)
struct statx tmp;
int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, name, AT_NO_AUTOMOUNT,
STATX_BASIC_STATS, &tmp);
if (rc == 0)
__cp_stat64_statx (buf, &tmp);
return rc;
+#else
+ return INLINE_SYSCALL (fstatat64, 4, AT_FDCWD, name, buf, 0);
#endif
}
errno = EINVAL;
diff --git a/sysdeps/unix/sysv/linux/statx_cp.c b/sysdeps/unix/sysv/linux/statx_cp.c
index cc6e17929ea0..faba286d963c 100644
--- a/sysdeps/unix/sysv/linux/statx_cp.c
+++ b/sysdeps/unix/sysv/linux/statx_cp.c
@@ -22,7 +22,7 @@
#include <statx_cp.h>
-#if !defined(__NR_fstat64) || !defined(__NR_fstatat64)
+#if !defined(__NR_fstat64) || !defined(__NR_fstatat64) || defined(STAT64_IS_NOT_KERNEL_STAT64)
void
__cp_stat64_statx (struct stat64 *to, struct statx *from)
{
--
2.20.1
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