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Linux 6.8 compat: use splice_copy_file_range() for fallback

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Linux 6.8 removes generic_copy_file_range(), which had been reduced to a
simple wrapper around splice_copy_file_range(). Detect that function
directly and use it if generic_ is not available.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #15930 
Closes #15931
This commit is contained in:
Rob N
2024-03-21 10:46:15 +11:00
committed by GitHub
parent 90ff732358
commit ef08a4d406
3 changed files with 43 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/kernel-vfs-file_range.m4
+27
View File
@@ -16,6 +16,9 @@ dnl #
dnl # 5.3: VFS copy_file_range() expected to do its own fallback,
dnl # generic_copy_file_range() added to support it
dnl #
dnl # 6.8: generic_copy_file_range() removed, replaced by
dnl # splice_copy_file_range()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_COPY_FILE_RANGE], [
ZFS_LINUX_TEST_SRC([vfs_copy_file_range], [
#include <linux/fs.h>
@@ -72,6 +75,30 @@ AC_DEFUN([ZFS_AC_KERNEL_VFS_GENERIC_COPY_FILE_RANGE], [
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_SPLICE_COPY_FILE_RANGE], [
ZFS_LINUX_TEST_SRC([splice_copy_file_range], [
#include <linux/splice.h>
], [
struct file *src_file __attribute__ ((unused)) = NULL;
loff_t src_off __attribute__ ((unused)) = 0;
struct file *dst_file __attribute__ ((unused)) = NULL;
loff_t dst_off __attribute__ ((unused)) = 0;
size_t len __attribute__ ((unused)) = 0;
splice_copy_file_range(src_file, src_off, dst_file, dst_off,
len);
])
])
AC_DEFUN([ZFS_AC_KERNEL_VFS_SPLICE_COPY_FILE_RANGE], [
AC_MSG_CHECKING([whether splice_copy_file_range() is available])
ZFS_LINUX_TEST_RESULT([splice_copy_file_range], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VFS_SPLICE_COPY_FILE_RANGE, 1,
[splice_copy_file_range() is available])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_CLONE_FILE_RANGE], [
ZFS_LINUX_TEST_SRC([vfs_clone_file_range], [
#include <linux/fs.h>
config/kernel.m4
+2
View File
@@ -118,6 +118,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_VFS_IOV_ITER
ZFS_AC_KERNEL_SRC_VFS_COPY_FILE_RANGE
ZFS_AC_KERNEL_SRC_VFS_GENERIC_COPY_FILE_RANGE
ZFS_AC_KERNEL_SRC_VFS_SPLICE_COPY_FILE_RANGE
ZFS_AC_KERNEL_SRC_VFS_REMAP_FILE_RANGE
ZFS_AC_KERNEL_SRC_VFS_CLONE_FILE_RANGE
ZFS_AC_KERNEL_SRC_VFS_DEDUPE_FILE_RANGE
@@ -266,6 +267,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_VFS_IOV_ITER
ZFS_AC_KERNEL_VFS_COPY_FILE_RANGE
ZFS_AC_KERNEL_VFS_GENERIC_COPY_FILE_RANGE
ZFS_AC_KERNEL_VFS_SPLICE_COPY_FILE_RANGE
ZFS_AC_KERNEL_VFS_REMAP_FILE_RANGE
ZFS_AC_KERNEL_VFS_CLONE_FILE_RANGE
ZFS_AC_KERNEL_VFS_DEDUPE_FILE_RANGE