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Linux 5.12 compat: replace bio_*_io_acct with disk_*_io_acct

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The bio_*_acct functions became GPL exports, which causes the
kernel modules to refuse to compile. This replaces code with
alternate function calls to the disk_*_io_acct interfaces, which
are not GPL exports. This change was added in kernel commit
99dfc43ecbf67f12a06512918aaba61d55863efc.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #11639
This commit is contained in:
Coleman Kane 2021-02-22 21:18:41 -05:00 committed by Brian Behlendorf
parent a0eb5a77a0
commit 6c1989923e
2 changed files with 53 additions and 24 deletions
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69
config/kernel-generic_io_acct.m4
View File

@ -2,6 +2,17 @@ dnl #
dnl # Check for generic io accounting interface.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT], [
ZFS_LINUX_TEST_SRC([disk_io_acct], [
#include <linux/blkdev.h>
], [
struct gendisk *disk = NULL;
struct bio *bio = NULL;
unsigned long start_time;
start_time = disk_start_io_acct(disk, bio_sectors(bio), bio_op(bio));
disk_end_io_acct(disk, bio_op(bio), start_time);
])
ZFS_LINUX_TEST_SRC([bio_io_acct], [
#include <linux/blkdev.h>
], [
@ -39,48 +50,62 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT], [
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
dnl #
dnl # 5.7 API,
dnl # 5.12 API,
dnl #
dnl # Added bio_start_io_acct() and bio_end_io_acct() helpers.
dnl # bio_start_io_acct() and bio_end_io_acct() became GPL-exported
dnl # so use disk_start_io_acct() and disk_end_io_acct() instead
dnl #
AC_MSG_CHECKING([whether generic bio_*_io_acct() are available])
ZFS_LINUX_TEST_RESULT([bio_io_acct], [
AC_MSG_CHECKING([whether generic disk_*_io_acct() are available])
ZFS_LINUX_TEST_RESULT([disk_io_acct], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_IO_ACCT, 1, [bio_*_io_acct() available])
AC_DEFINE(HAVE_DISK_IO_ACCT, 1, [disk_*_io_acct() available])
], [
AC_MSG_RESULT(no)
dnl #
dnl # 4.14 API,
dnl # 5.7 API,
dnl #
dnl # generic_start_io_acct/generic_end_io_acct now require
dnl # request_queue to be provided. No functional changes,
dnl # but preparation for inflight accounting.
dnl # Added bio_start_io_acct() and bio_end_io_acct() helpers.
dnl #
AC_MSG_CHECKING([whether generic_*_io_acct wants 4 args])
ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_4args],
[generic_start_io_acct], [block/bio.c], [
AC_MSG_CHECKING([whether generic bio_*_io_acct() are available])
ZFS_LINUX_TEST_RESULT([bio_io_acct], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_IO_ACCT_4ARG, 1,
[generic_*_io_acct() 4 arg available])
AC_DEFINE(HAVE_BIO_IO_ACCT, 1, [bio_*_io_acct() available])
], [
AC_MSG_RESULT(no)
dnl #
dnl # 3.19 API addition
dnl # 4.14 API,
dnl #
dnl # torvalds/linux@394ffa50 allows us to increment
dnl # iostat counters without generic_make_request().
dnl # generic_start_io_acct/generic_end_io_acct now require
dnl # request_queue to be provided. No functional changes,
dnl # but preparation for inflight accounting.
dnl #
AC_MSG_CHECKING(
[whether generic_*_io_acct wants 3 args])
ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_3args],
AC_MSG_CHECKING([whether generic_*_io_acct wants 4 args])
ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_4args],
[generic_start_io_acct], [block/bio.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_IO_ACCT_3ARG, 1,
[generic_*_io_acct() 3 arg available])
AC_DEFINE(HAVE_GENERIC_IO_ACCT_4ARG, 1,
[generic_*_io_acct() 4 arg available])
], [
AC_MSG_RESULT(no)
dnl #
dnl # 3.19 API addition
dnl #
dnl # torvalds/linux@394ffa50 allows us to increment
dnl # iostat counters without generic_make_request().
dnl #
AC_MSG_CHECKING(
[whether generic_*_io_acct wants 3 args])
ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_3args],
[generic_start_io_acct], [block/bio.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_IO_ACCT_3ARG, 1,
[generic_*_io_acct() 3 arg available])
], [
AC_MSG_RESULT(no)
])
])
])
])

8
include/os/linux/kernel/linux/blkdev_compat.h
View File

@ -520,7 +520,9 @@ blk_generic_start_io_acct(struct request_queue *q __attribute__((unused)),
struct gendisk *disk __attribute__((unused)),
int rw __attribute__((unused)), struct bio *bio)
{
#if defined(HAVE_BIO_IO_ACCT)
#if defined(HAVE_DISK_IO_ACCT)
return (disk_start_io_acct(disk, bio_sectors(bio), bio_op(bio)));
#elif defined(HAVE_BIO_IO_ACCT)
return (bio_start_io_acct(bio));
#elif defined(HAVE_GENERIC_IO_ACCT_3ARG)
unsigned long start_time = jiffies;
@ -541,7 +543,9 @@ blk_generic_end_io_acct(struct request_queue *q __attribute__((unused)),
struct gendisk *disk __attribute__((unused)),
int rw __attribute__((unused)), struct bio *bio, unsigned long start_time)
{
#if defined(HAVE_BIO_IO_ACCT)
#if defined(HAVE_DISK_IO_ACCT)
disk_end_io_acct(disk, bio_op(bio), start_time);
#elif defined(HAVE_BIO_IO_ACCT)
bio_end_io_acct(bio, start_time);
#elif defined(HAVE_GENERIC_IO_ACCT_3ARG)
generic_end_io_acct(rw, &disk->part0, start_time);