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Linux 6.8 compat: update for new bdev access functions

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blkdev_get_by_path() and blkdev_put() have been replaced by
bdev_open_by_path() and bdev_release(), which return a "handle" object
with the bdev object itself inside.

This adds detection for the new functions, and macros to handle the old
and new forms consistently.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #15805
This commit is contained in:
Rob Norris
2024-01-23 15:42:57 +11:00
committed by Brian Behlendorf
parent a41d0b29a9
commit 386d6a7533
2 changed files with 133 additions and 60 deletions
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config/kernel-blkdev.m4
+54 -2
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@@ -35,6 +35,25 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH_4ARG], [
])
])
dnl #
dnl # 6.8.x API change
dnl # bdev_open_by_path() replaces blkdev_get_by_path()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_OPEN_BY_PATH], [
ZFS_LINUX_TEST_SRC([bdev_open_by_path], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct bdev_handle *bdh __attribute__ ((unused)) = NULL;
const char *path = "path";
fmode_t mode = 0;
void *holder = NULL;
struct blk_holder_ops h;
bdh = bdev_open_by_path(path, mode, holder, &h);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
AC_MSG_CHECKING([whether blkdev_get_by_path() exists and takes 3 args])
ZFS_LINUX_TEST_RESULT([blkdev_get_by_path], [
@@ -47,7 +66,15 @@ AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
[blkdev_get_by_path() exists and takes 4 args])
AC_MSG_RESULT(yes)
], [
ZFS_LINUX_TEST_ERROR([blkdev_get_by_path()])
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether bdev_open_by_path() exists])
ZFS_LINUX_TEST_RESULT([bdev_open_by_path], [
AC_DEFINE(HAVE_BDEV_OPEN_BY_PATH, 1,
[bdev_open_by_path() exists])
AC_MSG_RESULT(yes)
], [
ZFS_LINUX_TEST_ERROR([blkdev_get_by_path()])
])
])
])
])
@@ -108,18 +135,41 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PUT_HOLDER], [
])
])
dnl #
dnl # 6.8.x API change
dnl # bdev_release() replaces blkdev_put()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_RELEASE], [
ZFS_LINUX_TEST_SRC([bdev_release], [
#include <linux/fs.h>
#include <linux/blkdev.h>
], [
struct bdev_handle *bdh = NULL;
bdev_release(bdh);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_PUT], [
AC_MSG_CHECKING([whether blkdev_put() exists])
ZFS_LINUX_TEST_RESULT([blkdev_put], [
AC_MSG_RESULT(yes)
], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether blkdev_put() accepts void* as arg 2])
ZFS_LINUX_TEST_RESULT([blkdev_put_holder], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BLKDEV_PUT_HOLDER, 1,
[blkdev_put() accepts void* as arg 2])
], [
ZFS_LINUX_TEST_ERROR([blkdev_put()])
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether bdev_release() exists])
ZFS_LINUX_TEST_RESULT([bdev_release], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDEV_RELEASE, 1,
[bdev_release() exists])
], [
ZFS_LINUX_TEST_ERROR([blkdev_put()])
])
])
])
])
@@ -570,8 +620,10 @@ AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BLK_STS_RESV_CONFLICT], [
AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV], [
ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH
ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH_4ARG
ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_OPEN_BY_PATH
ZFS_AC_KERNEL_SRC_BLKDEV_PUT
ZFS_AC_KERNEL_SRC_BLKDEV_PUT_HOLDER
ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_RELEASE
ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART
ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV
ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV