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Redhat have backported copy_file_range and clone_file_range to the EL7 kernel using an "extended file operations" wrapper structure. This connects all that up to let cloning work there too. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Kay Pedersen <mail@mkwg.de> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Sponsored-By: OpenDrives Inc. Sponsored-By: Klara Inc. Closes #15050
51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
dnl #
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dnl # EL7 have backported copy_file_range and clone_file_range and
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dnl # added them to an "extended" file_operations struct.
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dnl #
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dnl # We're testing for both functions in one here, because they will only
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dnl # ever appear together and we don't want to match a similar method in
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dnl # some future vendor kernel.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_FILE_OPERATIONS_EXTEND], [
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ZFS_LINUX_TEST_SRC([vfs_file_operations_extend], [
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#include <linux/fs.h>
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static ssize_t test_copy_file_range(struct file *src_file,
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loff_t src_off, struct file *dst_file, loff_t dst_off,
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size_t len, unsigned int flags) {
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(void) src_file; (void) src_off;
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(void) dst_file; (void) dst_off;
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(void) len; (void) flags;
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return (0);
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}
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static int test_clone_file_range(struct file *src_file,
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loff_t src_off, struct file *dst_file, loff_t dst_off,
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u64 len) {
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(void) src_file; (void) src_off;
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(void) dst_file; (void) dst_off;
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(void) len;
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return (0);
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}
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static const struct file_operations_extend
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fops __attribute__ ((unused)) = {
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.kabi_fops = {},
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.copy_file_range = test_copy_file_range,
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.clone_file_range = test_clone_file_range,
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};
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_VFS_FILE_OPERATIONS_EXTEND], [
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AC_MSG_CHECKING([whether file_operations_extend takes \
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.copy_file_range() and .clone_file_range()])
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ZFS_LINUX_TEST_RESULT([vfs_file_operations_extend], [
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_VFS_FILE_OPERATIONS_EXTEND, 1,
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[file_operations_extend takes .copy_file_range()
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and .clone_file_range()])
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],[
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AC_MSG_RESULT([no])
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])
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])
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