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Removing old code outside of 4.18 kernsls

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There were checks still in place to verify we could completely use
iov_iter's on the Linux side. All interfaces are available as of kernel
4.18, so there is no reason to check whether we should use that
interface at this point. This PR completely removes the UIO_USERSPACE
type. It also removes the check for the direct_IO interface checks.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Brian Atkinson <batkinson@lanl.gov>
Closes #16856
This commit is contained in:
Brian Atkinson
2024-12-02 18:04:56 -07:00
committed by Brian Behlendorf
parent acda137d8c
commit c6442bd3b6
7 changed files with 26 additions and 324 deletions
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config/kernel-vfs-iov_iter.m4
+2 -37
View File
@@ -15,7 +15,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_IOV_ITER], [
ZFS_LINUX_TEST_SRC([iov_iter_get_pages2], [
#include <linux/uio.h>
], [
],[
struct iov_iter iter = { 0 };
struct page **pages = NULL;
size_t maxsize = 4096;
@@ -27,20 +27,6 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_IOV_ITER], [
&start);
])
ZFS_LINUX_TEST_SRC([iov_iter_get_pages], [
#include <linux/uio.h>
], [
struct iov_iter iter = { 0 };
struct page **pages = NULL;
size_t maxsize = 4096;
unsigned maxpages = 1;
size_t start;
size_t ret __attribute__ ((unused));
ret = iov_iter_get_pages(&iter, pages, maxsize, maxpages,
&start);
])
ZFS_LINUX_TEST_SRC([iov_iter_type], [
#include <linux/fs.h>
#include <linux/uio.h>
@@ -59,7 +45,6 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_IOV_ITER], [
])
AC_DEFUN([ZFS_AC_KERNEL_VFS_IOV_ITER], [
enable_vfs_iov_iter="yes"
AC_MSG_CHECKING([whether fault_in_iov_iter_readable() is available])
ZFS_LINUX_TEST_RESULT([fault_in_iov_iter_readable], [
@@ -78,17 +63,8 @@ AC_DEFUN([ZFS_AC_KERNEL_VFS_IOV_ITER], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOV_ITER_GET_PAGES2, 1,
[iov_iter_get_pages2() is available])
], [
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether iov_iter_get_pages() is available])
ZFS_LINUX_TEST_RESULT([iov_iter_get_pages], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOV_ITER_GET_PAGES, 1,
[iov_iter_get_pages() is available])
], [
AC_MSG_RESULT(no)
enable_vfs_iov_iter="no"
])
])
dnl #
@@ -105,17 +81,6 @@ AC_DEFUN([ZFS_AC_KERNEL_VFS_IOV_ITER], [
AC_MSG_RESULT(no)
])
dnl #
dnl # As of the 4.9 kernel support is provided for iovecs, kvecs,
dnl # bvecs and pipes in the iov_iter structure. As long as the
dnl # other support interfaces are all available the iov_iter can
dnl # be correctly used in the uio structure.
dnl #
AS_IF([test "x$enable_vfs_iov_iter" = "xyes"], [
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