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io: Remove copy_file_range emulation [BZ #24744]

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The kernel is evolving this interface (e.g., removal of the
restriction on cross-device copies), and keeping up with that
is difficult.  Applications which need the function should
run kernels which support the system call instead of relying on
the imperfect glibc emulation.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2019-06-28 09:39:21 +02:00
parent 1626f499d1
commit 5a659ccc0e
14 changed files with 81 additions and 783 deletions
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4
sysdeps/unix/sysv/linux/kernel-features.h
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@ -100,10 +100,6 @@
# define __ASSUME_MLOCK2 1
#endif
#if __LINUX_KERNEL_VERSION >= 0x040500
# define __ASSUME_COPY_FILE_RANGE 1
#endif
/* Support for statx was added in kernel 4.11. */
#if __LINUX_KERNEL_VERSION >= 0x040B00
# define __ASSUME_STATX 1