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linux: Implement fstatat with __fstatat64_time64

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It makes fstatat use __NR_statx, which fix the s390 issue with
missing nanoxsecond support on compat stat syscalls (at least
on recent kernels) and limits the statx call to only one function
(which simplifies the __ASSUME_STATX support).

Checked on i686-linux-gnu and on powerpc-linux-gnu.
This commit is contained in:
Adhemerval Zanella
2021-03-18 20:30:13 +03:00
parent 27f7463675
commit 4c4e90ccf8
1 changed files with 11 additions and 38 deletions
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49
sysdeps/unix/sysv/linux/fstatat.c
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@ -26,33 +26,22 @@
int int
__fstatat (int fd, const char *file, struct stat *buf, int flag) __fstatat (int fd, const char *file, struct stat *buf, int flag)
{ {
int r; struct __stat64_t64 st64;
int r = __fstatat64_time64 (fd, file, &st64, flag);
# if STAT_IS_KERNEL_STAT
/* New kABIs which uses generic pre 64-bit time Linux ABI, e.g.
csky, nios2 */
r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
if (r == 0 && (buf->__st_ino_pad != 0
|| buf->__st_size_pad != 0
|| buf->__st_blocks_pad != 0))
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
# else
# ifdef __NR_fstatat64
/* Old KABIs with old non-LFS support, e.g. arm, i386, hppa, m68k, mips32,
microblaze, s390, sh, powerpc, and sparc. */
struct stat64 st64;
r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
if (r == 0) if (r == 0)
{ {
if (! in_ino_t_range (st64.st_ino) if (! in_ino_t_range (st64.st_ino)
|| ! in_off_t_range (st64.st_size) || ! in_off_t_range (st64.st_size)
|| ! in_blkcnt_t_range (st64.st_blocks)) || ! in_blkcnt_t_range (st64.st_blocks)
|| ! in_time_t_range (st64.st_atim.tv_sec)
|| ! in_time_t_range (st64.st_mtim.tv_sec)
|| ! in_time_t_range (st64.st_ctim.tv_sec))
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW); return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
/* Clear internal pad and reserved fields. */ /* Clear internal pad and reserved fields. */
memset (buf, 0, sizeof (*buf)); memset (buf, 0, sizeof (*buf));
buf->st_dev = st64.st_dev, buf->st_dev = st64.st_dev;
buf->st_ino = st64.st_ino; buf->st_ino = st64.st_ino;
buf->st_mode = st64.st_mode; buf->st_mode = st64.st_mode;
buf->st_nlink = st64.st_nlink; buf->st_nlink = st64.st_nlink;
@ -62,27 +51,11 @@ __fstatat (int fd, const char *file, struct stat *buf, int flag)
buf->st_size = st64.st_size; buf->st_size = st64.st_size;
buf->st_blksize = st64.st_blksize; buf->st_blksize = st64.st_blksize;
buf->st_blocks = st64.st_blocks; buf->st_blocks = st64.st_blocks;
buf->st_atim.tv_sec = st64.st_atim.tv_sec; buf->st_atim = valid_timespec64_to_timespec (st64.st_atim);
buf->st_atim.tv_nsec = st64.st_atim.tv_nsec; buf->st_mtim = valid_timespec64_to_timespec (st64.st_mtim);
buf->st_mtim.tv_sec = st64.st_mtim.tv_sec; buf->st_ctim = valid_timespec64_to_timespec (st64.st_ctim);
buf->st_mtim.tv_nsec = st64.st_mtim.tv_nsec;
buf->st_ctim.tv_sec = st64.st_ctim.tv_sec;
buf->st_ctim.tv_nsec = st64.st_ctim.tv_nsec;
return 0;
} }
# else return r;
/* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
struct kernel_stat kst;
r = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
if (r == 0)
r = __cp_kstat_stat (&kst, buf);
# endif /* __nr_fstatat64 */
# endif /* STAT_IS_KERNEL_STAT */
return INTERNAL_SYSCALL_ERROR_P (r)
? INLINE_SYSCALL_ERROR_RETURN_VALUE (-r)
: 0;
} }
weak_alias (__fstatat, fstatat) weak_alias (__fstatat, fstatat)