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zfs/config/kernel-blk-queue.m4

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Linux compat: Minimum kernel version 3.10 Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9566
2019-11-12 16:59:06 +00:00
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 - x.y, 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 #
Linux 5.15 compat: block device readahead The 5.15 kernel moved the backing_dev_info structure out of the request queue structure which causes a build failure. Rather than look in the new location for the BDI we instead detect this upstream refactoring by the existance of either the blk_queue_update_readahead() or disk_update_readahead() functions. In either case, there's no longer any reason to manually set the ra_pages value since it will be overridden with a reasonable default (2x the block size) when blk_queue_io_opt() is called. Therefore, we update the compatibility wrapper to do nothing for 5.9 and newer kernels. While it's tempting to do the same for older kernels we want to keep the compatibility code to preserve the existing behavior. Removing it would effectively increase the default readahead to 128k. Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #12532
2021-09-08 15:03:13 +00:00
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_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 # 2.6.32 API,
Linux compat: Minimum kernel version 3.10 Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9566
2019-11-12 16:59:06 +00:00
dnl # blk_queue_discard()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_DISCARD], [
ZFS_LINUX_TEST_SRC([blk_queue_discard], [
#include <linux/blkdev.h>
],[
struct request_queue *q __attribute__ ((unused)) = NULL;
int value __attribute__ ((unused));
value = blk_queue_discard(q);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_DISCARD], [
AC_MSG_CHECKING([whether blk_queue_discard() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_discard], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([blk_queue_discard])
])
])
dnl #
dnl # 4.8 - 4.x API,
dnl # blk_queue_secure_erase()
dnl #
dnl # 2.6.36 - 4.7 API,
dnl # blk_queue_secdiscard()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_SECURE_ERASE], [
ZFS_LINUX_TEST_SRC([blk_queue_secure_erase], [
#include <linux/blkdev.h>
],[
struct request_queue *q __attribute__ ((unused)) = NULL;
int value __attribute__ ((unused));
value = blk_queue_secure_erase(q);
])
ZFS_LINUX_TEST_SRC([blk_queue_secdiscard], [
#include <linux/blkdev.h>
],[
struct request_queue *q __attribute__ ((unused)) = NULL;
int value __attribute__ ((unused));
value = blk_queue_secdiscard(q);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_SECURE_ERASE], [
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 = NULL;
(void) blk_queue_flush(q, REQ_FLUSH);
Linux 5.11 compat: conftest Update the ZFS_LINUX_TEST_PROGRAM macro to always set the module license. As of the 5.11 kernel not setting a license has been converted from a warning to an error. Reviewed-by: Rafael Kitover <rkitover@gmail.com> Reviewed-by: Coleman Kane <ckane@colemankane.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #11387 Closes #11390
2020-12-23 19:40:02 +00:00
], [$NO_UNUSED_BUT_SET_VARIABLE], [ZFS_META_LICENSE])
Linux compat: Minimum kernel version 3.10 Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9566
2019-11-12 16:59:06 +00:00
ZFS_LINUX_TEST_SRC([blk_queue_write_cache], [
#include <linux/kernel.h>
#include <linux/blkdev.h>
], [
struct request_queue *q = NULL;
blk_queue_write_cache(q, true, true);
Linux 5.11 compat: conftest Update the ZFS_LINUX_TEST_PROGRAM macro to always set the module license. As of the 5.11 kernel not setting a license has been converted from a warning to an error. Reviewed-by: Rafael Kitover <rkitover@gmail.com> Reviewed-by: Coleman Kane <ckane@colemankane.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #11387 Closes #11390
2020-12-23 19:40:02 +00:00
], [$NO_UNUSED_BUT_SET_VARIABLE], [ZFS_META_LICENSE])
Linux compat: Minimum kernel version 3.10 Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9566
2019-11-12 16:59:06 +00:00
])
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 = NULL;
(void) blk_queue_max_hw_sectors(q, BLK_SAFE_MAX_SECTORS);
], [$NO_UNUSED_BUT_SET_VARIABLE])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS], [
AC_MSG_CHECKING([whether blk_queue_max_hw_sectors() is available])
ZFS_LINUX_TEST_RESULT([blk_queue_max_hw_sectors], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([blk_queue_max_hw_sectors])
])
])
dnl #
dnl # 2.6.34 API change
dnl # blk_queue_max_segments() consolidates blk_queue_max_hw_segments()
dnl # and blk_queue_max_phys_segments().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_MAX_SEGMENTS], [
ZFS_LINUX_TEST_SRC([blk_queue_max_segments], [
#include <linux/blkdev.h>
], [
struct request_queue *q = NULL;
(void) blk_queue_max_segments(q, BLK_MAX_SEGMENTS);
], [$NO_UNUSED_BUT_SET_VARIABLE])
])
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])
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE], [
ZFS_AC_KERNEL_SRC_BLK_QUEUE_PLUG
ZFS_AC_KERNEL_SRC_BLK_QUEUE_BDI
Linux 5.15 compat: block device readahead The 5.15 kernel moved the backing_dev_info structure out of the request queue structure which causes a build failure. Rather than look in the new location for the BDI we instead detect this upstream refactoring by the existance of either the blk_queue_update_readahead() or disk_update_readahead() functions. In either case, there's no longer any reason to manually set the ra_pages value since it will be overridden with a reasonable default (2x the block size) when blk_queue_io_opt() is called. Therefore, we update the compatibility wrapper to do nothing for 5.9 and newer kernels. While it's tempting to do the same for older kernels we want to keep the compatibility code to preserve the existing behavior. Removing it would effectively increase the default readahead to 128k. Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #12532
2021-09-08 15:03:13 +00:00
ZFS_AC_KERNEL_SRC_BLK_QUEUE_UPDATE_READAHEAD
Linux compat: Minimum kernel version 3.10 Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9566
2019-11-12 16:59:06 +00:00
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
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE], [
ZFS_AC_KERNEL_BLK_QUEUE_PLUG
ZFS_AC_KERNEL_BLK_QUEUE_BDI
Linux 5.15 compat: block device readahead The 5.15 kernel moved the backing_dev_info structure out of the request queue structure which causes a build failure. Rather than look in the new location for the BDI we instead detect this upstream refactoring by the existance of either the blk_queue_update_readahead() or disk_update_readahead() functions. In either case, there's no longer any reason to manually set the ra_pages value since it will be overridden with a reasonable default (2x the block size) when blk_queue_io_opt() is called. Therefore, we update the compatibility wrapper to do nothing for 5.9 and newer kernels. While it's tempting to do the same for older kernels we want to keep the compatibility code to preserve the existing behavior. Removing it would effectively increase the default readahead to 128k. Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #12532
2021-09-08 15:03:13 +00:00
ZFS_AC_KERNEL_BLK_QUEUE_UPDATE_READAHEAD
Linux compat: Minimum kernel version 3.10 Increase the minimum supported kernel version from 2.6.32 to 3.10. This removes support for the following Linux enterprise distributions. Distribution | Kernel | End of Life ---------------- | ------ | ------------- Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017 SLES 11 | 3.0 | Mar 32, 2019 RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020 The following changes were made as part of removing support. * Updated `configure` to enforce a minimum kernel version as specified in the META file (Linux-Minimum: 3.10). configure: error: *** Cannot build against kernel version 2.6.32. *** The minimum supported kernel version is 3.10. * Removed all `configure` kABI checks and matching C code for interfaces which solely predate the Linux 3.10 kernel. * Updated all `configure` kABI checks to fail when an interface is missing which was in the 3.10 kernel up to the latest 5.1 kernel. Removed the HAVE_* preprocessor defines for these checks and updated the code to unconditionally use the verified interface. * Inverted the detection logic in several kABI checks to match the new interface as it appears in 3.10 and newer and not the legacy interface. * Consolidated the following checks in to individual files. Due the large number of changes in the checks it made sense to handle this now. It would be desirable to group other related checks in the same fashion, but this as left as future work. - config/kernel-blkdev.m4 - Block device kABI checks - config/kernel-blk-queue.m4 - Block queue kABI checks - config/kernel-bio.m4 - Bio interface kABI checks * Removed the kABI checks for sops->nr_cached_objects() and sops->free_cached_objects(). These interfaces are currently unused. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #9566
2019-11-12 16:59:06 +00:00
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
])