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zfs/config/kernel-bio_set_dev.m4

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Linux 3.14 compat: IO acct, global_page_state, etc generic_start_io_acct/generic_end_io_acct in the master branch of the linux kernel requires that the request_queue be provided. Move the logic from freemem in the spl to arc_free_memory in arc.c. Do this so we can take advantage of global_page_state interface checks in zfs. Upstream kernel replaced struct block_device with struct gendisk in struct bio. Determine if the function bio_set_dev exists during configure and have zfs use that if it exists. bio_set_dev https://github.com/torvalds/linux/commit/74d4699 global_node_page_state https://github.com/torvalds/linux/commit/75ef718 io acct https://github.com/torvalds/linux/commit/d62e26b Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes #6635
2017-09-16 18:00:19 +00:00
dnl #
dnl # Linux 4.14 API,
dnl #
Linux 5.0 compat: Fix bio_set_dev() The Linux 5.0 kernel updated the bio_set_dev() macro so it calls the GPL-only bio_associate_blkg() symbol thus inadvertently converting the entire macro. Provide a minimal version which always assigns the request queue's root_blkg to the bio. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #8287
2019-01-16 18:39:19 +00:00
dnl # The bio_set_dev() helper macro was introduced as part of the transition
Linux 3.14 compat: IO acct, global_page_state, etc generic_start_io_acct/generic_end_io_acct in the master branch of the linux kernel requires that the request_queue be provided. Move the logic from freemem in the spl to arc_free_memory in arc.c. Do this so we can take advantage of global_page_state interface checks in zfs. Upstream kernel replaced struct block_device with struct gendisk in struct bio. Determine if the function bio_set_dev exists during configure and have zfs use that if it exists. bio_set_dev https://github.com/torvalds/linux/commit/74d4699 global_node_page_state https://github.com/torvalds/linux/commit/75ef718 io acct https://github.com/torvalds/linux/commit/d62e26b Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes #6635
2017-09-16 18:00:19 +00:00
dnl # to have struct gendisk in struct bio.
dnl #
Linux 5.0 compat: Fix bio_set_dev() The Linux 5.0 kernel updated the bio_set_dev() macro so it calls the GPL-only bio_associate_blkg() symbol thus inadvertently converting the entire macro. Provide a minimal version which always assigns the request queue's root_blkg to the bio. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #8287
2019-01-16 18:39:19 +00:00
AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV_MACRO], [
Linux 3.14 compat: IO acct, global_page_state, etc generic_start_io_acct/generic_end_io_acct in the master branch of the linux kernel requires that the request_queue be provided. Move the logic from freemem in the spl to arc_free_memory in arc.c. Do this so we can take advantage of global_page_state interface checks in zfs. Upstream kernel replaced struct block_device with struct gendisk in struct bio. Determine if the function bio_set_dev exists during configure and have zfs use that if it exists. bio_set_dev https://github.com/torvalds/linux/commit/74d4699 global_node_page_state https://github.com/torvalds/linux/commit/75ef718 io acct https://github.com/torvalds/linux/commit/d62e26b Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes #6635
2017-09-16 18:00:19 +00:00
AC_MSG_CHECKING([whether bio_set_dev() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/bio.h>
#include <linux/fs.h>
],[
struct block_device *bdev = NULL;
struct bio *bio = NULL;
bio_set_dev(bio, bdev);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_DEV, 1, [bio_set_dev() exists])
],[
AC_MSG_RESULT(no)
])
])
Linux 5.0 compat: Fix bio_set_dev() The Linux 5.0 kernel updated the bio_set_dev() macro so it calls the GPL-only bio_associate_blkg() symbol thus inadvertently converting the entire macro. Provide a minimal version which always assigns the request queue's root_blkg to the bio. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #8287
2019-01-16 18:39:19 +00:00
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_BIO_SET_DEV_GPL_ONLY], [
AC_MSG_CHECKING([whether bio_set_dev() is GPL-only])
ZFS_LINUX_TRY_COMPILE([
#include <linux/module.h>
#include <linux/bio.h>
#include <linux/fs.h>
MODULE_LICENSE("$ZFS_META_LICENSE");
],[
struct block_device *bdev = NULL;
struct bio *bio = NULL;
bio_set_dev(bio, bdev);
],[
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_DEV_GPL_ONLY, 1,
[bio_set_dev() GPL-only])
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
ZFS_AC_KERNEL_BIO_SET_DEV_MACRO
ZFS_AC_KERNEL_BIO_SET_DEV_GPL_ONLY
])