1dnl # 2dnl # EL7 have backported copy_file_range and clone_file_range and 3dnl # added them to an "extended" file_operations struct. 4dnl # 5dnl # We're testing for both functions in one here, because they will only 6dnl # ever appear together and we don't want to match a similar method in 7dnl # some future vendor kernel. 8dnl # 9AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_FILE_OPERATIONS_EXTEND], [ 10 ZFS_LINUX_TEST_SRC([vfs_file_operations_extend], [ 11 #include <linux/fs.h> 12 13 static ssize_t test_copy_file_range(struct file *src_file, 14 loff_t src_off, struct file *dst_file, loff_t dst_off, 15 size_t len, unsigned int flags) { 16 (void) src_file; (void) src_off; 17 (void) dst_file; (void) dst_off; 18 (void) len; (void) flags; 19 return (0); 20 } 21 22 static int test_clone_file_range(struct file *src_file, 23 loff_t src_off, struct file *dst_file, loff_t dst_off, 24 u64 len) { 25 (void) src_file; (void) src_off; 26 (void) dst_file; (void) dst_off; 27 (void) len; 28 return (0); 29 } 30 31 static const struct file_operations_extend 32 fops __attribute__ ((unused)) = { 33 .kabi_fops = {}, 34 .copy_file_range = test_copy_file_range, 35 .clone_file_range = test_clone_file_range, 36 }; 37 ],[]) 38]) 39AC_DEFUN([ZFS_AC_KERNEL_VFS_FILE_OPERATIONS_EXTEND], [ 40 AC_MSG_CHECKING([whether file_operations_extend takes \ 41.copy_file_range() and .clone_file_range()]) 42 ZFS_LINUX_TEST_RESULT([vfs_file_operations_extend], [ 43 AC_MSG_RESULT([yes]) 44 AC_DEFINE(HAVE_VFS_FILE_OPERATIONS_EXTEND, 1, 45 [file_operations_extend takes .copy_file_range() 46 and .clone_file_range()]) 47 ],[ 48 AC_MSG_RESULT([no]) 49 ]) 50]) 51