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mirror_zfs/config/kernel-blk-queue.m4
Rob N 3c5f354a8c zvol_os: fix compile with blk-mq on Linux 4.x 
99741bde5 accesses a cached blk-mq hardware context through the mq_hctx
field of struct request. However, this field did not exist until 5.0.
Before that, the private function blk_mq_map_queue() was used to dig it
out of broader queue context. This commit detects this situation, and
handles it with a poor-man's simulation of that function.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16069
2024-04-17 10:10:24 -07:00

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dnl #
dnl # 2.6.39 API change,
dnl # blk_start_plug() and blk_finish_plug()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_PLUG], [
ZFS_LINUX_TEST_SRC([blk_plug], [
#include <linux/blkdev.h>
],[
struct blk_plug plug __attribute__ ((unused));
blk_start_plug(&plug);
blk_finish_plug(&plug);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_PLUG], [
AC_MSG_CHECKING([whether struct blk_plug is available])
ZFS_LINUX_TEST_RESULT([blk_plug], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([blk_plug])
])
])
dnl #
dnl # 2.6.32 - 4.11: statically allocated bdi in request_queue
dnl # 4.12: dynamically allocated bdi in request_queue
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_BDI], [
ZFS_LINUX_TEST_SRC([blk_queue_bdi], [
#include <linux/blkdev.h>
],[
struct request_queue q;
struct backing_dev_info bdi;
q.backing_dev_info = &bdi;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_BDI], [
AC_MSG_CHECKING([whether blk_queue bdi is dynamic])
ZFS_LINUX_TEST_RESULT([blk_queue_bdi], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_BDI_DYNAMIC, 1,
[blk queue backing_dev_info is dynamic])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 5.9: added blk_queue_update_readahead(),
dnl # 5.15: renamed to disk_update_readahead()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_UPDATE_READAHEAD], [
ZFS_LINUX_TEST_SRC([blk_queue_update_readahead], [
#include <linux/blkdev.h>
],[
struct request_queue q;
blk_queue_update_readahead(&q);
])
ZFS_LINUX_TEST_SRC([disk_update_readahead], [
#include <linux/blkdev.h>
],[
struct gendisk disk;
disk_update_readahead(&disk);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_UPDATE_READAHEAD], [
AC_MSG_CHECKING([whether blk_queue_update_readahead() exists])
ZFS_LINUX_TEST_RESULT([blk_queue_update_readahead], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_UPDATE_READAHEAD, 1,
[blk_queue_update_readahead() exists])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether disk_update_readahead() exists])
ZFS_LINUX_TEST_RESULT([disk_update_readahead], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_DISK_UPDATE_READAHEAD, 1,
[disk_update_readahead() exists])
],[
AC_MSG_RESULT(no)
])
])
])
dnl #
dnl # 5.19: bdev_max_discard_sectors() available
dnl # 2.6.32: blk_queue_discard() available
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_DISCARD], [
ZFS_LINUX_TEST_SRC([bdev_max_discard_sectors], [
#include <linux/blkdev.h>
],[
struct block_device *bdev __attribute__ ((unused)) = NULL;
unsigned int error __attribute__ ((unused));
error = bdev_max_discard_sectors(bdev);
])
ZFS_LINUX_TEST_SRC([blk_queue_discard], [
#include <linux/blkdev.h>
],[
struct request_queue r;
struct request_queue *q = &r;
int value __attribute__ ((unused));
memset(q, 0, sizeof(r));
value = blk_queue_discard(q);
],[-Wframe-larger-than=8192])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_DISCARD], [
AC_MSG_CHECKING([whether bdev_max_discard_sectors() is available])
ZFS_LINUX_TEST_RESULT([bdev_max_discard_sectors], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDEV_MAX_DISCARD_SECTORS, 1,
[bdev_max_discard_sectors() is available])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether blk_queue_discard() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_discard], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_DISCARD, 1,
[blk_queue_discard() is available])
],[
ZFS_LINUX_TEST_ERROR([blk_queue_discard])
])
])
])
dnl #
dnl # 5.19: bdev_max_secure_erase_sectors() available
dnl # 4.8: blk_queue_secure_erase() available
dnl # 2.6.36: blk_queue_secdiscard() available
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_SECURE_ERASE], [
ZFS_LINUX_TEST_SRC([bdev_max_secure_erase_sectors], [
#include <linux/blkdev.h>
],[
struct block_device *bdev __attribute__ ((unused)) = NULL;
unsigned int error __attribute__ ((unused));
error = bdev_max_secure_erase_sectors(bdev);
])
ZFS_LINUX_TEST_SRC([blk_queue_secure_erase], [
#include <linux/blkdev.h>
],[
struct request_queue r;
struct request_queue *q = &r;
int value __attribute__ ((unused));
memset(q, 0, sizeof(r));
value = blk_queue_secure_erase(q);
],[-Wframe-larger-than=8192])
ZFS_LINUX_TEST_SRC([blk_queue_secdiscard], [
#include <linux/blkdev.h>
],[
struct request_queue r;
struct request_queue *q = &r;
int value __attribute__ ((unused));
memset(q, 0, sizeof(r));
value = blk_queue_secdiscard(q);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_SECURE_ERASE], [
AC_MSG_CHECKING([whether bdev_max_secure_erase_sectors() is available])
ZFS_LINUX_TEST_RESULT([bdev_max_secure_erase_sectors], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDEV_MAX_SECURE_ERASE_SECTORS, 1,
[bdev_max_secure_erase_sectors() is available])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether blk_queue_secure_erase() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_secure_erase], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_SECURE_ERASE, 1,
[blk_queue_secure_erase() is available])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether blk_queue_secdiscard() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_secdiscard], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_SECDISCARD, 1,
[blk_queue_secdiscard() is available])
],[
ZFS_LINUX_TEST_ERROR([blk_queue_secure_erase])
])
])
])
])
dnl #
dnl # 4.16 API change,
dnl # Introduction of blk_queue_flag_set and blk_queue_flag_clear
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLAG_SET], [
ZFS_LINUX_TEST_SRC([blk_queue_flag_set], [
#include <linux/kernel.h>
#include <linux/blkdev.h>
],[
struct request_queue *q = NULL;
blk_queue_flag_set(0, q);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLAG_SET], [
AC_MSG_CHECKING([whether blk_queue_flag_set() exists])
ZFS_LINUX_TEST_RESULT([blk_queue_flag_set], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_FLAG_SET, 1,
[blk_queue_flag_set() exists])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLAG_CLEAR], [
ZFS_LINUX_TEST_SRC([blk_queue_flag_clear], [
#include <linux/kernel.h>
#include <linux/blkdev.h>
],[
struct request_queue *q = NULL;
blk_queue_flag_clear(0, q);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLAG_CLEAR], [
AC_MSG_CHECKING([whether blk_queue_flag_clear() exists])
ZFS_LINUX_TEST_RESULT([blk_queue_flag_clear], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_FLAG_CLEAR, 1,
[blk_queue_flag_clear() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.36 API change,
dnl # Added blk_queue_flush() interface, while the previous interface
dnl # was available to all the new one is GPL-only. Thus in addition to
dnl # detecting if this function is available we determine if it is
dnl # GPL-only. If the GPL-only interface is there we implement our own
dnl # compatibility function, otherwise we use the function. The hope
dnl # is that long term this function will be opened up.
dnl #
dnl # 4.7 API change,
dnl # Replace blk_queue_flush with blk_queue_write_cache
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLUSH], [
ZFS_LINUX_TEST_SRC([blk_queue_flush], [
#include <linux/blkdev.h>
], [
struct request_queue *q __attribute__ ((unused)) = NULL;
(void) blk_queue_flush(q, REQ_FLUSH);
], [], [ZFS_META_LICENSE])
ZFS_LINUX_TEST_SRC([blk_queue_write_cache], [
#include <linux/kernel.h>
#include <linux/blkdev.h>
], [
struct request_queue *q __attribute__ ((unused)) = NULL;
blk_queue_write_cache(q, true, true);
], [], [ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLUSH], [
AC_MSG_CHECKING([whether blk_queue_flush() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_flush], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_FLUSH, 1,
[blk_queue_flush() is available])
AC_MSG_CHECKING([whether blk_queue_flush() is GPL-only])
ZFS_LINUX_TEST_RESULT([blk_queue_flush_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_FLUSH_GPL_ONLY, 1,
[blk_queue_flush() is GPL-only])
])
],[
AC_MSG_RESULT(no)
])
dnl #
dnl # 4.7 API change
dnl # Replace blk_queue_flush with blk_queue_write_cache
dnl #
AC_MSG_CHECKING([whether blk_queue_write_cache() exists])
ZFS_LINUX_TEST_RESULT([blk_queue_write_cache], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_WRITE_CACHE, 1,
[blk_queue_write_cache() exists])
AC_MSG_CHECKING([whether blk_queue_write_cache() is GPL-only])
ZFS_LINUX_TEST_RESULT([blk_queue_write_cache_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_WRITE_CACHE_GPL_ONLY, 1,
[blk_queue_write_cache() is GPL-only])
])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.34 API change
dnl # blk_queue_max_hw_sectors() replaces blk_queue_max_sectors().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_HW_SECTORS], [
ZFS_LINUX_TEST_SRC([blk_queue_max_hw_sectors], [
#include <linux/blkdev.h>
], [
struct request_queue *q __attribute__ ((unused)) = NULL;
(void) blk_queue_max_hw_sectors(q, BLK_SAFE_MAX_SECTORS);
], [])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS], [
AC_MSG_CHECKING([whether blk_queue_max_hw_sectors() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_max_hw_sectors], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([blk_queue_max_hw_sectors])
])
])
dnl #
dnl # 2.6.34 API change
dnl # blk_queue_max_segments() consolidates blk_queue_max_hw_segments()
dnl # and blk_queue_max_phys_segments().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_SEGMENTS], [
ZFS_LINUX_TEST_SRC([blk_queue_max_segments], [
#include <linux/blkdev.h>
], [
struct request_queue *q __attribute__ ((unused)) = NULL;
(void) blk_queue_max_segments(q, BLK_MAX_SEGMENTS);
], [])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS], [
AC_MSG_CHECKING([whether blk_queue_max_segments() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_max_segments], [
AC_MSG_RESULT(yes)
], [
ZFS_LINUX_TEST_ERROR([blk_queue_max_segments])
])
])
dnl #
dnl # See if kernel supports block multi-queue and blk_status_t.
dnl # blk_status_t represents the new status codes introduced in the 4.13
dnl # kernel patch:
dnl #
dnl # block: introduce new block status code type
dnl #
dnl # We do not currently support the "old" block multi-queue interfaces from
dnl # prior kernels.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_MQ], [
ZFS_LINUX_TEST_SRC([blk_mq], [
#include <linux/blk-mq.h>
], [
struct blk_mq_tag_set tag_set __attribute__ ((unused)) = {0};
(void) blk_mq_alloc_tag_set(&tag_set);
return BLK_STS_OK;
], [])
ZFS_LINUX_TEST_SRC([blk_mq_rq_hctx], [
#include <linux/blk-mq.h>
#include <linux/blkdev.h>
], [
struct request rq = {0};
struct blk_mq_hw_ctx *hctx = NULL;
rq.mq_hctx = hctx;
], [])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_MQ], [
AC_MSG_CHECKING([whether block multiqueue with blk_status_t is available])
ZFS_LINUX_TEST_RESULT([blk_mq], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_MQ, 1, [block multiqueue is available])
AC_MSG_CHECKING([whether block multiqueue hardware context is cached in struct request])
ZFS_LINUX_TEST_RESULT([blk_mq_rq_hctx], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_MQ_RQ_HCTX, 1, [block multiqueue hardware context is cached in struct request])
], [
AC_MSG_RESULT(no)
])
], [
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE], [
ZFS_AC_KERNEL_SRC_BLK_QUEUE_PLUG
ZFS_AC_KERNEL_SRC_BLK_QUEUE_BDI
ZFS_AC_KERNEL_SRC_BLK_QUEUE_UPDATE_READAHEAD
ZFS_AC_KERNEL_SRC_BLK_QUEUE_DISCARD
ZFS_AC_KERNEL_SRC_BLK_QUEUE_SECURE_ERASE
ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLAG_SET
ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLAG_CLEAR
ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLUSH
ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_HW_SECTORS
ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_SEGMENTS
ZFS_AC_KERNEL_SRC_BLK_MQ
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE], [
ZFS_AC_KERNEL_BLK_QUEUE_PLUG
ZFS_AC_KERNEL_BLK_QUEUE_BDI
ZFS_AC_KERNEL_BLK_QUEUE_UPDATE_READAHEAD
ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
ZFS_AC_KERNEL_BLK_QUEUE_SECURE_ERASE
ZFS_AC_KERNEL_BLK_QUEUE_FLAG_SET
ZFS_AC_KERNEL_BLK_QUEUE_FLAG_CLEAR
ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
ZFS_AC_KERNEL_BLK_MQ
])
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