Re: [PATCH bpf-next v5 8/9] bpf: Add tests for task_local_storage

[Alexei Starovoitov]

On Thu, Nov 05, 2020 at 10:58:26PM +0000, KP Singh wrote:
> +
> +	ret = copy_file_range(fd_in, NULL, fd_out, NULL, stat.st_size, 0);

centos7 glibc doesn't have it.

/prog_tests/test_local_storage.c:59:8: warning: implicit declaration of function ‘copy_file_range’; did you mean ‘sync_file_range’? [-Wimplicit-function-declaration]
   59 |  ret = copy_file_range(fd_in, NULL, fd_out, NULL, stat.st_size, 0);
      |        ^~~~~~~~~~~~~~~
      |        sync_file_range
  BINARY   test_progs
  BINARY   test_progs-no_alu32
ld: test_local_storage.test.o: in function `copy_rm':
test_local_storage.c:59: undefined reference to `copy_file_range'

Could you use something else or wrap it similar to pidfd_open ?