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dnl #
dnl # Linux 4.8 API,
dnl #
dnl # The bio_op() helper was introduced as a replacement for explicitly
dnl # checking the bio->bi_rw flags. The following checks are used to
dnl # detect if a specific operation is supported.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_OPS], [
ZFS_LINUX_TEST_SRC([bio_set_op_attrs], [
#include <linux/bio.h>
],[
struct bio *bio __attribute__ ((unused)) = NULL;
bio_set_op_attrs(bio, 0, 0);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_OP_ATTRS], [
AC_MSG_CHECKING([whether bio_set_op_attrs is available])
ZFS_LINUX_TEST_RESULT([bio_set_op_attrs], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_OP_ATTRS, 1,
[bio_set_op_attrs is available])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 4.14 API,
dnl #
dnl # The bio_set_dev() helper macro was introduced as part of the transition
dnl # to have struct gendisk in struct bio.
dnl #
dnl # Linux 5.0 API,
dnl #
dnl # The bio_set_dev() helper macro was updated to internally depend on
dnl # bio_associate_blkg() symbol which is exported GPL-only.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_SET_DEV], [
ZFS_LINUX_TEST_SRC([bio_set_dev], [
#include <linux/bio.h>
#include <linux/fs.h>
],[
struct block_device *bdev = NULL;
struct bio *bio = NULL;
bio_set_dev(bio, bdev);
], [], [ZFS_META_LICENSE])
])
dnl #
dnl # Linux 5.16 API
dnl #
dnl # bio_set_dev is no longer a helper macro and is now an inline function,
dnl # meaning that the function it calls internally can no longer be overridden
dnl # by our code
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_SET_DEV_MACRO], [
ZFS_LINUX_TEST_SRC([bio_set_dev_macro], [
#include <linux/bio.h>
#include <linux/fs.h>
],[
#ifndef bio_set_dev
#error Not a macro
#endif
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
AC_MSG_CHECKING([whether bio_set_dev() is GPL-only])
ZFS_LINUX_TEST_RESULT([bio_set_dev_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_DEV_GPL_ONLY, 1,
[bio_set_dev() GPL-only])
])
AC_MSG_CHECKING([whether bio_set_dev() is a macro])
ZFS_LINUX_TEST_RESULT([bio_set_dev_macro], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_DEV_MACRO, 1,
[bio_set_dev() is a macro])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.34 API change
dnl # current->bio_list
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_CURRENT_BIO_LIST], [
ZFS_LINUX_TEST_SRC([current_bio_list], [
#include <linux/sched.h>
], [
current->bio_list = (struct bio_list *) NULL;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_CURRENT_BIO_LIST], [
AC_MSG_CHECKING([whether current->bio_list exists])
ZFS_LINUX_TEST_RESULT([current_bio_list], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([bio_list])
])
])
dnl #
dnl # Linux 5.5 API,
dnl #
dnl # The Linux 5.5 kernel updated percpu_ref_tryget() which is inlined by
dnl # blkg_tryget() to use rcu_read_lock() instead of rcu_read_lock_sched().
dnl # As a side effect the function was converted to GPL-only.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKG_TRYGET], [
ZFS_LINUX_TEST_SRC([blkg_tryget], [
#include <linux/blk-cgroup.h>
#include <linux/bio.h>
#include <linux/fs.h>
],[
struct blkcg_gq blkg __attribute__ ((unused)) = {};
bool rc __attribute__ ((unused));
rc = blkg_tryget(&blkg);
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKG_TRYGET], [
AC_MSG_CHECKING([whether blkg_tryget() is available])
ZFS_LINUX_TEST_RESULT([blkg_tryget], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKG_TRYGET, 1, [blkg_tryget() is available])
AC_MSG_CHECKING([whether blkg_tryget() is GPL-only])
ZFS_LINUX_TEST_RESULT([blkg_tryget_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKG_TRYGET_GPL_ONLY, 1,
[blkg_tryget() GPL-only])
])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 5.12 API,
dnl #
dnl # The Linux 5.12 kernel updated struct bio to create a new bi_bdev member
dnl # and bio->bi_disk was moved to bio->bi_bdev->bd_disk
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_BDEV_DISK], [
ZFS_LINUX_TEST_SRC([bio_bdev_disk], [
#include <linux/blk_types.h>
#include <linux/blkdev.h>
],[
struct bio *b = NULL;
struct gendisk *d = b->bi_bdev->bd_disk;
blk_register_queue(d);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_BDEV_DISK], [
AC_MSG_CHECKING([whether bio->bi_bdev->bd_disk exists])
ZFS_LINUX_TEST_RESULT([bio_bdev_disk], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_BDEV_DISK, 1, [bio->bi_bdev->bd_disk exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 5.16 API
dnl #
dnl # The Linux 5.16 API for submit_bio changed the return type to be
dnl # void instead of int
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BDEV_SUBMIT_BIO_RETURNS_VOID], [
ZFS_LINUX_TEST_SRC([bio_bdev_submit_bio_void], [
#include <linux/blkdev.h>
],[
struct block_device_operations *bdev = NULL;
__attribute__((unused)) void(*f)(struct bio *) = bdev->submit_bio;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BDEV_SUBMIT_BIO_RETURNS_VOID], [
AC_MSG_CHECKING(
[whether block_device_operations->submit_bio() returns void])
ZFS_LINUX_TEST_RESULT([bio_bdev_submit_bio_void], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDEV_SUBMIT_BIO_RETURNS_VOID, 1,
[block_device_operations->submit_bio() returns void])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 5.18 API
dnl #
dnl # In 07888c665b405b1cd3577ddebfeb74f4717a84c4 ("block: pass a block_device and opf to bio_alloc")
dnl # bio_alloc(gfp_t gfp_mask, unsigned short nr_iovecs)
dnl # became
dnl # bio_alloc(struct block_device *bdev, unsigned short nr_vecs, unsigned int opf, gfp_t gfp_mask)
dnl # however
dnl # > NULL/0 can be passed, both for the
dnl # > passthrough case on a raw request_queue and to temporarily avoid
dnl # > refactoring some nasty code.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_ALLOC_4ARG], [
ZFS_LINUX_TEST_SRC([bio_alloc_4arg], [
#include <linux/bio.h>
],[
gfp_t gfp_mask = 0;
unsigned short nr_iovecs = 0;
struct block_device *bdev = NULL;
unsigned int opf = 0;
struct bio *__attribute__((unused)) allocated = bio_alloc(bdev, nr_iovecs, opf, gfp_mask);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_ALLOC_4ARG], [
AC_MSG_CHECKING([whether bio_alloc() wants 4 args])
ZFS_LINUX_TEST_RESULT([bio_alloc_4arg],[
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_BIO_ALLOC_4ARG], 1, [bio_alloc() takes 4 arguments])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO], [
ZFS_AC_KERNEL_SRC_BIO_OPS
ZFS_AC_KERNEL_SRC_BIO_SET_DEV
ZFS_AC_KERNEL_SRC_BIO_CURRENT_BIO_LIST
ZFS_AC_KERNEL_SRC_BLKG_TRYGET
ZFS_AC_KERNEL_SRC_BIO_BDEV_DISK
ZFS_AC_KERNEL_SRC_BDEV_SUBMIT_BIO_RETURNS_VOID
ZFS_AC_KERNEL_SRC_BIO_SET_DEV_MACRO
ZFS_AC_KERNEL_SRC_BIO_ALLOC_4ARG
])
AC_DEFUN([ZFS_AC_KERNEL_BIO], [
ZFS_AC_KERNEL_BIO_SET_OP_ATTRS
ZFS_AC_KERNEL_BIO_SET_DEV
ZFS_AC_KERNEL_BIO_CURRENT_BIO_LIST
ZFS_AC_KERNEL_BLKG_TRYGET
ZFS_AC_KERNEL_BIO_BDEV_DISK
ZFS_AC_KERNEL_BDEV_SUBMIT_BIO_RETURNS_VOID
ZFS_AC_KERNEL_BIO_ALLOC_4ARG
])
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