The kernel is evolving this interface rapidly, and our emulation is no longer faithful: Among other things, we do not detect overlapping copies (which is quite hard outside the kernel). The kernel also plans to support cross-device copies.
The master branch has been updated by Florian Weimer <fw@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5a659ccc0ec217ab02a4c273a1f6d346a359560a commit 5a659ccc0ec217ab02a4c273a1f6d346a359560a Author: Florian Weimer <fweimer@redhat.com> Date: Fri Jun 28 09:39:21 2019 +0200 io: Remove copy_file_range emulation [BZ #24744] 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>
Fixed in glibc 2.30.
The release/2.29/master branch has been updated by Florian Weimer <fw@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=da347f4aa3a67e018f19e51a7ece6add87dba5cf commit da347f4aa3a67e018f19e51a7ece6add87dba5cf Author: Florian Weimer <fweimer@redhat.com> Date: Fri Jun 28 09:39:21 2019 +0200 io: Remove copy_file_range emulation [BZ #24744] 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> (cherry picked from commit 5a659ccc0ec217ab02a4c273a1f6d346a359560a)
The release/2.27/master branch has been updated by Florian Weimer <fw@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=949da7f2fd0bc0f8dca91892e5c926504a7d11c2 commit 949da7f2fd0bc0f8dca91892e5c926504a7d11c2 Author: Florian Weimer <fweimer@redhat.com> Date: Fri Jun 28 09:39:21 2019 +0200 io: Remove copy_file_range emulation [BZ #24744] 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> (cherry picked from commit 5a659ccc0ec217ab02a4c273a1f6d346a359560a)
The release/2.28/master branch has been updated by Florian Weimer <fw@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5f7fa9ac30048bcc1d883cf52a544ea182882ee9 commit 5f7fa9ac30048bcc1d883cf52a544ea182882ee9 Author: Florian Weimer <fweimer@redhat.com> Date: Fri Jun 28 09:39:21 2019 +0200 io: Remove copy_file_range emulation [BZ #24744] 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> (cherry picked from commit 5a659ccc0ec217ab02a4c273a1f6d346a359560a)