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Linux 6.11: get backing_dev_info through queue gendisk

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It's no longer available directly on the request queue, but its easy to
get from the attached disk.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #16400
This commit is contained in:
Rob Norris 2024-07-30 22:25:50 +10:00 committed by Tony Hutter
parent 4fa84563b8
commit 92a8af0f8b
2 changed files with 31 additions and 1 deletions
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28
config/kernel-blk-queue.m4
View File

@ -25,6 +25,8 @@ AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_PLUG], [
dnl #
dnl # 2.6.32 - 4.11: statically allocated bdi in request_queue
dnl # 4.12: dynamically allocated bdi in request_queue
dnl # 6.11: bdi no longer available through request_queue, so get it from
dnl # the gendisk attached to the queue
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_BDI], [
ZFS_LINUX_TEST_SRC([blk_queue_bdi], [
@ -47,6 +49,30 @@ AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_BDI], [
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_DISK_BDI], [
ZFS_LINUX_TEST_SRC([blk_queue_disk_bdi], [
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
], [
struct request_queue q;
struct gendisk disk;
struct backing_dev_info bdi __attribute__ ((unused));
q.disk = &disk;
q.disk->bdi = &bdi;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_DISK_BDI], [
AC_MSG_CHECKING([whether backing_dev_info is available through queue gendisk])
ZFS_LINUX_TEST_RESULT([blk_queue_disk_bdi], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLK_QUEUE_DISK_BDI, 1,
[backing_dev_info is available through queue gendisk])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 5.9: added blk_queue_update_readahead(),
dnl # 5.15: renamed to disk_update_readahead()
@ -407,6 +433,7 @@ AC_DEFUN([ZFS_AC_KERNEL_BLK_MQ], [
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_DISK_BDI
ZFS_AC_KERNEL_SRC_BLK_QUEUE_UPDATE_READAHEAD
ZFS_AC_KERNEL_SRC_BLK_QUEUE_DISCARD
ZFS_AC_KERNEL_SRC_BLK_QUEUE_SECURE_ERASE
@ -421,6 +448,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE], [
AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE], [
ZFS_AC_KERNEL_BLK_QUEUE_PLUG
ZFS_AC_KERNEL_BLK_QUEUE_BDI
ZFS_AC_KERNEL_BLK_QUEUE_DISK_BDI
ZFS_AC_KERNEL_BLK_QUEUE_UPDATE_READAHEAD
ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
ZFS_AC_KERNEL_BLK_QUEUE_SECURE_ERASE

4
include/os/linux/kernel/linux/blkdev_compat.h
View File

@ -106,8 +106,10 @@ blk_queue_set_read_ahead(struct request_queue *q, unsigned long ra_pages)
{
#if !defined(HAVE_BLK_QUEUE_UPDATE_READAHEAD) && \
!defined(HAVE_DISK_UPDATE_READAHEAD)
#ifdef HAVE_BLK_QUEUE_BDI_DYNAMIC
#if defined(HAVE_BLK_QUEUE_BDI_DYNAMIC)
q->backing_dev_info->ra_pages = ra_pages;
#elif defined(HAVE_BLK_QUEUE_DISK_BDI)
q->disk->bdi->ra_pages = ra_pages;
#else
q->backing_dev_info.ra_pages = ra_pages;
#endif