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Linux 6.4 compat: iter_iov() function now used to get old iov member

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The iov_iter->iov member is now iov_iter->__iov and must be accessed via
the accessor function iter_iov(). Create a wrapper that is conditionally
compiled to use the access method appropriate for the target kernel
version.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #15100
This commit is contained in:
Coleman Kane
2023-07-23 01:34:29 -04:00
committed by Tony Hutter
parent 7c0618bdb7
commit feb0fa6b38
3 changed files with 32 additions and 5 deletions
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config/kernel-vfs-iov_iter.m4
+23
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@@ -93,6 +93,14 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_IOV_ITER], [
struct iov_iter iter = { 0 };
__attribute__((unused)) enum iter_type i = iov_iter_type(&iter);
])
ZFS_LINUX_TEST_SRC([iter_iov], [
#include <linux/fs.h>
#include <linux/uio.h>
],[
struct iov_iter iter = { 0 };
__attribute__((unused)) const struct iovec *iov = iter_iov(&iter);
])
])
AC_DEFUN([ZFS_AC_KERNEL_VFS_IOV_ITER], [
@@ -201,4 +209,19 @@ AC_DEFUN([ZFS_AC_KERNEL_VFS_IOV_ITER], [
AC_DEFINE(HAVE_VFS_IOV_ITER, 1,
[All required iov_iter interfaces are available])
])
dnl #
dnl # Kernel 6.5 introduces the iter_iov() function that returns the
dnl # __iov member of an iov_iter*. The iov member was renamed to this
dnl # __iov member, and is intended to be accessed via the helper
dnl # function now.
dnl #
AC_MSG_CHECKING([whether iter_iov() is available])
ZFS_LINUX_TEST_RESULT([iter_iov], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_ITER_IOV, 1,
[iter_iov() is available])
],[
AC_MSG_RESULT(no)
])
])