2 dnl # 2.6.38 API change,
3 dnl # Added blkdev_get_by_path()
5 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH], [
6 ZFS_LINUX_TEST_SRC([blkdev_get_by_path], [
8 #include <linux/blkdev.h>
10 struct block_device *bdev __attribute__ ((unused)) = NULL;
11 const char *path = "path";
15 bdev = blkdev_get_by_path(path, mode, holder);
19 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
20 AC_MSG_CHECKING([whether blkdev_get_by_path() exists])
21 ZFS_LINUX_TEST_RESULT([blkdev_get_by_path], [
24 ZFS_LINUX_TEST_ERROR([blkdev_get_by_path()])
29 dnl # 2.6.38 API change,
30 dnl # Added blkdev_put()
32 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PUT], [
33 ZFS_LINUX_TEST_SRC([blkdev_put], [
35 #include <linux/blkdev.h>
37 struct block_device *bdev = NULL;
40 blkdev_put(bdev, mode);
44 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_PUT], [
45 AC_MSG_CHECKING([whether blkdev_put() exists])
46 ZFS_LINUX_TEST_RESULT([blkdev_put], [
49 ZFS_LINUX_TEST_ERROR([blkdev_put()])
54 dnl # 4.1 API, exported blkdev_reread_part() symbol, back ported to the
55 dnl # 3.10.0 CentOS 7.x enterprise kernels.
57 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART], [
58 ZFS_LINUX_TEST_SRC([blkdev_reread_part], [
60 #include <linux/blkdev.h>
62 struct block_device *bdev = NULL;
65 error = blkdev_reread_part(bdev);
69 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_REREAD_PART], [
70 AC_MSG_CHECKING([whether blkdev_reread_part() exists])
71 ZFS_LINUX_TEST_RESULT([blkdev_reread_part], [
73 AC_DEFINE(HAVE_BLKDEV_REREAD_PART, 1,
74 [blkdev_reread_part() exists])
81 dnl # 2.6.22 API change
82 dnl # Single argument invalidate_bdev()
84 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV], [
85 ZFS_LINUX_TEST_SRC([invalidate_bdev], [
86 #include <linux/buffer_head.h>
87 #include <linux/blkdev.h>
89 struct block_device *bdev = NULL;
90 invalidate_bdev(bdev);
94 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV], [
95 AC_MSG_CHECKING([whether invalidate_bdev() exists])
96 ZFS_LINUX_TEST_RESULT([invalidate_bdev], [
99 ZFS_LINUX_TEST_ERROR([invalidate_bdev()])
104 dnl # 2.6.27, lookup_bdev() was exported.
105 dnl # 4.4.0-6.21 - lookup_bdev() takes 2 arguments.
107 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV], [
108 ZFS_LINUX_TEST_SRC([lookup_bdev_1arg], [
109 #include <linux/fs.h>
110 #include <linux/blkdev.h>
115 ZFS_LINUX_TEST_SRC([lookup_bdev_2args], [
116 #include <linux/fs.h>
118 lookup_bdev(NULL, FMODE_READ);
122 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV], [
123 AC_MSG_CHECKING([whether lookup_bdev() wants 1 arg])
124 ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_1arg],
125 [lookup_bdev], [fs/block_dev.c], [
127 AC_DEFINE(HAVE_1ARG_LOOKUP_BDEV, 1,
128 [lookup_bdev() wants 1 arg])
132 AC_MSG_CHECKING([whether lookup_bdev() wants 2 args])
133 ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_2args],
134 [lookup_bdev], [fs/block_dev.c], [
136 AC_DEFINE(HAVE_2ARGS_LOOKUP_BDEV, 1,
137 [lookup_bdev() wants 2 args])
139 ZFS_LINUX_TEST_ERROR([lookup_bdev()])
145 dnl # 2.6.30 API change
147 dnl # The bdev_physical_block_size() interface was added to provide a way
148 dnl # to determine the smallest write which can be performed without a
149 dnl # read-modify-write operation.
151 dnl # Unfortunately, this interface isn't entirely reliable because
152 dnl # drives are sometimes known to misreport this value.
154 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
155 ZFS_LINUX_TEST_SRC([bdev_physical_block_size], [
156 #include <linux/blkdev.h>
158 struct block_device *bdev __attribute__ ((unused)) = NULL;
159 bdev_physical_block_size(bdev);
163 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
164 AC_MSG_CHECKING([whether bdev_physical_block_size() is available])
165 ZFS_LINUX_TEST_RESULT([bdev_physical_block_size], [
168 ZFS_LINUX_TEST_ERROR([bdev_physical_block_size()])
173 dnl # 2.6.30 API change
174 dnl # Added bdev_logical_block_size().
176 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
177 ZFS_LINUX_TEST_SRC([bdev_logical_block_size], [
178 #include <linux/blkdev.h>
180 struct block_device *bdev __attribute__ ((unused)) = NULL;
181 bdev_logical_block_size(bdev);
185 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
186 AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
187 ZFS_LINUX_TEST_RESULT([bdev_logical_block_size], [
190 ZFS_LINUX_TEST_ERROR([bdev_logical_block_size()])
194 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV], [
195 ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH
196 ZFS_AC_KERNEL_SRC_BLKDEV_PUT
197 ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART
198 ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV
199 ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV
200 ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
201 ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
204 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV], [
205 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
206 ZFS_AC_KERNEL_BLKDEV_PUT
207 ZFS_AC_KERNEL_BLKDEV_REREAD_PART
208 ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV
209 ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV
210 ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
211 ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE