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mirror_zfs/config/kernel-blkdev.m4
Brian Behlendorf bebdf52a16 Linux 5.20 compat: bdevname() 
As of the Linux 5.20 kernel bdevname() has been removed, all
callers should use snprintf() and the "%pg" format specifier.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13728
2022-08-04 16:57:33 -07:00

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dnl #
dnl # 2.6.38 API change,
dnl # Added blkdev_get_by_path()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH], [
ZFS_LINUX_TEST_SRC([blkdev_get_by_path], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev __attribute__ ((unused)) = NULL;
const char *path = "path";
fmode_t mode = 0;
void *holder = NULL;
bdev = blkdev_get_by_path(path, mode, holder);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
AC_MSG_CHECKING([whether blkdev_get_by_path() exists])
ZFS_LINUX_TEST_RESULT([blkdev_get_by_path], [
AC_MSG_RESULT(yes)
], [
ZFS_LINUX_TEST_ERROR([blkdev_get_by_path()])
])
])
dnl #
dnl # 2.6.38 API change,
dnl # Added blkdev_put()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PUT], [
ZFS_LINUX_TEST_SRC([blkdev_put], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev = NULL;
fmode_t mode = 0;
blkdev_put(bdev, mode);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_PUT], [
AC_MSG_CHECKING([whether blkdev_put() exists])
ZFS_LINUX_TEST_RESULT([blkdev_put], [
AC_MSG_RESULT(yes)
], [
ZFS_LINUX_TEST_ERROR([blkdev_put()])
])
])
dnl #
dnl # 4.1 API, exported blkdev_reread_part() symbol, back ported to the
dnl # 3.10.0 CentOS 7.x enterprise kernels.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART], [
ZFS_LINUX_TEST_SRC([blkdev_reread_part], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev = NULL;
int error;
error = blkdev_reread_part(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_REREAD_PART], [
AC_MSG_CHECKING([whether blkdev_reread_part() exists])
ZFS_LINUX_TEST_RESULT([blkdev_reread_part], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKDEV_REREAD_PART, 1,
[blkdev_reread_part() exists])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # check_disk_change() was removed in 5.10
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_CHECK_DISK_CHANGE], [
ZFS_LINUX_TEST_SRC([check_disk_change], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev = NULL;
bool error;
error = check_disk_change(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_CHECK_DISK_CHANGE], [
AC_MSG_CHECKING([whether check_disk_change() exists])
ZFS_LINUX_TEST_RESULT([check_disk_change], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CHECK_DISK_CHANGE, 1,
[check_disk_change() exists])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 5.10 API, check_disk_change() is removed, in favor of
dnl # bdev_check_media_change(), which doesn't force revalidation
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_CHECK_MEDIA_CHANGE], [
ZFS_LINUX_TEST_SRC([bdev_check_media_change], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev = NULL;
int error;
error = bdev_check_media_change(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_CHECK_MEDIA_CHANGE], [
AC_MSG_CHECKING([whether bdev_check_media_change() exists])
ZFS_LINUX_TEST_RESULT([bdev_check_media_change], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDEV_CHECK_MEDIA_CHANGE, 1,
[bdev_check_media_change() exists])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.22 API change
dnl # Single argument invalidate_bdev()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV], [
ZFS_LINUX_TEST_SRC([invalidate_bdev], [
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
],[
struct block_device *bdev = NULL;
invalidate_bdev(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV], [
AC_MSG_CHECKING([whether invalidate_bdev() exists])
ZFS_LINUX_TEST_RESULT([invalidate_bdev], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([invalidate_bdev()])
])
])
dnl #
dnl # 5.11 API, lookup_bdev() takes dev_t argument.
dnl # 2.6.27 API, lookup_bdev() was first exported.
dnl # 4.4.0-6.21 API, lookup_bdev() on Ubuntu takes mode argument.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV], [
ZFS_LINUX_TEST_SRC([lookup_bdev_devt], [
#include <linux/blkdev.h>
], [
int error __attribute__ ((unused));
const char path[] = "/example/path";
dev_t dev;
error = lookup_bdev(path, &dev);
])
ZFS_LINUX_TEST_SRC([lookup_bdev_1arg], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev __attribute__ ((unused));
const char path[] = "/example/path";
bdev = lookup_bdev(path);
])
ZFS_LINUX_TEST_SRC([lookup_bdev_mode], [
#include <linux/fs.h>
], [
struct block_device *bdev __attribute__ ((unused));
const char path[] = "/example/path";
bdev = lookup_bdev(path, FMODE_READ);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV], [
AC_MSG_CHECKING([whether lookup_bdev() wants dev_t arg])
ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_devt],
[lookup_bdev], [fs/block_dev.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_DEVT_LOOKUP_BDEV, 1,
[lookup_bdev() wants dev_t arg])
], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether lookup_bdev() wants 1 arg])
ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_1arg],
[lookup_bdev], [fs/block_dev.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_1ARG_LOOKUP_BDEV, 1,
[lookup_bdev() wants 1 arg])
], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether lookup_bdev() wants mode arg])
ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_mode],
[lookup_bdev], [fs/block_dev.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MODE_LOOKUP_BDEV, 1,
[lookup_bdev() wants mode arg])
], [
ZFS_LINUX_TEST_ERROR([lookup_bdev()])
])
])
])
])
dnl #
dnl # 2.6.30 API change
dnl #
dnl # The bdev_physical_block_size() interface was added to provide a way
dnl # to determine the smallest write which can be performed without a
dnl # read-modify-write operation.
dnl #
dnl # Unfortunately, this interface isn't entirely reliable because
dnl # drives are sometimes known to misreport this value.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
ZFS_LINUX_TEST_SRC([bdev_physical_block_size], [
#include <linux/blkdev.h>
],[
struct block_device *bdev __attribute__ ((unused)) = NULL;
bdev_physical_block_size(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
AC_MSG_CHECKING([whether bdev_physical_block_size() is available])
ZFS_LINUX_TEST_RESULT([bdev_physical_block_size], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([bdev_physical_block_size()])
])
])
dnl #
dnl # 2.6.30 API change
dnl # Added bdev_logical_block_size().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
ZFS_LINUX_TEST_SRC([bdev_logical_block_size], [
#include <linux/blkdev.h>
],[
struct block_device *bdev __attribute__ ((unused)) = NULL;
bdev_logical_block_size(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
ZFS_LINUX_TEST_RESULT([bdev_logical_block_size], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([bdev_logical_block_size()])
])
])
dnl #
dnl # 5.11 API change
dnl # Added bdev_whole() helper.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_WHOLE], [
ZFS_LINUX_TEST_SRC([bdev_whole], [
#include <linux/blkdev.h>
],[
struct block_device *bdev = NULL;
bdev = bdev_whole(bdev);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_WHOLE], [
AC_MSG_CHECKING([whether bdev_whole() is available])
ZFS_LINUX_TEST_RESULT([bdev_whole], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDEV_WHOLE, 1, [bdev_whole() is available])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 5.20 API change,
dnl # Removed bdevname(), snprintf(.., %pg) should be used.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEVNAME], [
ZFS_LINUX_TEST_SRC([bdevname], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct block_device *bdev __attribute__ ((unused)) = NULL;
char path[BDEVNAME_SIZE];
(void) bdevname(bdev, path);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEVNAME], [
AC_MSG_CHECKING([whether bdevname() exists])
ZFS_LINUX_TEST_RESULT([bdevname], [
AC_DEFINE(HAVE_BDEVNAME, 1, [bdevname() is available])
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 5.19 API: blkdev_issue_secure_erase()
dnl # 3.10 API: blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE)
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE], [
ZFS_LINUX_TEST_SRC([blkdev_issue_secure_erase], [
#include <linux/blkdev.h>
],[
struct block_device *bdev = NULL;
sector_t sector = 0;
sector_t nr_sects = 0;
int error __attribute__ ((unused));
error = blkdev_issue_secure_erase(bdev,
sector, nr_sects, GFP_KERNEL);
])
ZFS_LINUX_TEST_SRC([blkdev_issue_discard_flags], [
#include <linux/blkdev.h>
],[
struct block_device *bdev = NULL;
sector_t sector = 0;
sector_t nr_sects = 0;
unsigned long flags = 0;
int error __attribute__ ((unused));
error = blkdev_issue_discard(bdev,
sector, nr_sects, GFP_KERNEL, flags);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE], [
AC_MSG_CHECKING([whether blkdev_issue_secure_erase() is available])
ZFS_LINUX_TEST_RESULT([blkdev_issue_secure_erase], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKDEV_ISSUE_SECURE_ERASE, 1,
[blkdev_issue_secure_erase() is available])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether blkdev_issue_discard() is available])
ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_flags], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD, 1,
[blkdev_issue_discard() is available])
],[
ZFS_LINUX_TEST_ERROR([blkdev_issue_discard()])
])
])
])
dnl #
dnl # 5.13 API change
dnl # blkdev_get_by_path() no longer handles ERESTARTSYS
dnl #
dnl # Unfortunately we're forced to rely solely on the kernel version
dnl # number in order to determine the expected behavior. This was an
dnl # internal change to blkdev_get_by_dev(), see commit a8ed1a0607.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_ERESTARTSYS], [
AC_MSG_CHECKING([whether blkdev_get_by_path() handles ERESTARTSYS])
AS_VERSION_COMPARE([$LINUX_VERSION], [5.13.0], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKDEV_GET_ERESTARTSYS, 1,
[blkdev_get_by_path() handles ERESTARTSYS])
],[
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV], [
ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH
ZFS_AC_KERNEL_SRC_BLKDEV_PUT
ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART
ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV
ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV
ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
ZFS_AC_KERNEL_SRC_BLKDEV_CHECK_DISK_CHANGE
ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_CHECK_MEDIA_CHANGE
ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_WHOLE
ZFS_AC_KERNEL_SRC_BLKDEV_BDEVNAME
ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV], [
ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
ZFS_AC_KERNEL_BLKDEV_PUT
ZFS_AC_KERNEL_BLKDEV_REREAD_PART
ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV
ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV
ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BLKDEV_CHECK_DISK_CHANGE
ZFS_AC_KERNEL_BLKDEV_BDEV_CHECK_MEDIA_CHANGE
ZFS_AC_KERNEL_BLKDEV_BDEV_WHOLE
ZFS_AC_KERNEL_BLKDEV_BDEVNAME
ZFS_AC_KERNEL_BLKDEV_GET_ERESTARTSYS
ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE
])
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