xref: /freebsd/sys/contrib/openzfs/config/kernel-blkdev.m4 (revision eda14cbc264d6969b02f2b1994cef11148e914f1)
1*eda14cbcSMatt Macydnl #
2*eda14cbcSMatt Macydnl # 2.6.38 API change,
3*eda14cbcSMatt Macydnl # Added blkdev_get_by_path()
4*eda14cbcSMatt Macydnl #
5*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH], [
6*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([blkdev_get_by_path], [
7*eda14cbcSMatt Macy		#include <linux/fs.h>
8*eda14cbcSMatt Macy		#include <linux/blkdev.h>
9*eda14cbcSMatt Macy	], [
10*eda14cbcSMatt Macy		struct block_device *bdev __attribute__ ((unused)) = NULL;
11*eda14cbcSMatt Macy		const char *path = "path";
12*eda14cbcSMatt Macy		fmode_t mode = 0;
13*eda14cbcSMatt Macy		void *holder = NULL;
14*eda14cbcSMatt Macy
15*eda14cbcSMatt Macy		bdev = blkdev_get_by_path(path, mode, holder);
16*eda14cbcSMatt Macy	])
17*eda14cbcSMatt Macy])
18*eda14cbcSMatt Macy
19*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
20*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether blkdev_get_by_path() exists])
21*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT([blkdev_get_by_path], [
22*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
23*eda14cbcSMatt Macy	], [
24*eda14cbcSMatt Macy		ZFS_LINUX_TEST_ERROR([blkdev_get_by_path()])
25*eda14cbcSMatt Macy	])
26*eda14cbcSMatt Macy])
27*eda14cbcSMatt Macy
28*eda14cbcSMatt Macydnl #
29*eda14cbcSMatt Macydnl # 2.6.38 API change,
30*eda14cbcSMatt Macydnl # Added blkdev_put()
31*eda14cbcSMatt Macydnl #
32*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PUT], [
33*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([blkdev_put], [
34*eda14cbcSMatt Macy		#include <linux/fs.h>
35*eda14cbcSMatt Macy		#include <linux/blkdev.h>
36*eda14cbcSMatt Macy	], [
37*eda14cbcSMatt Macy		struct block_device *bdev = NULL;
38*eda14cbcSMatt Macy		fmode_t mode = 0;
39*eda14cbcSMatt Macy
40*eda14cbcSMatt Macy		blkdev_put(bdev, mode);
41*eda14cbcSMatt Macy	])
42*eda14cbcSMatt Macy])
43*eda14cbcSMatt Macy
44*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_PUT], [
45*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether blkdev_put() exists])
46*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT([blkdev_put], [
47*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
48*eda14cbcSMatt Macy	], [
49*eda14cbcSMatt Macy		ZFS_LINUX_TEST_ERROR([blkdev_put()])
50*eda14cbcSMatt Macy	])
51*eda14cbcSMatt Macy])
52*eda14cbcSMatt Macy
53*eda14cbcSMatt Macydnl #
54*eda14cbcSMatt Macydnl # 4.1 API, exported blkdev_reread_part() symbol, back ported to the
55*eda14cbcSMatt Macydnl # 3.10.0 CentOS 7.x enterprise kernels.
56*eda14cbcSMatt Macydnl #
57*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART], [
58*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([blkdev_reread_part], [
59*eda14cbcSMatt Macy		#include <linux/fs.h>
60*eda14cbcSMatt Macy		#include <linux/blkdev.h>
61*eda14cbcSMatt Macy	], [
62*eda14cbcSMatt Macy		struct block_device *bdev = NULL;
63*eda14cbcSMatt Macy		int error;
64*eda14cbcSMatt Macy
65*eda14cbcSMatt Macy		error = blkdev_reread_part(bdev);
66*eda14cbcSMatt Macy	])
67*eda14cbcSMatt Macy])
68*eda14cbcSMatt Macy
69*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_REREAD_PART], [
70*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether blkdev_reread_part() exists])
71*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT([blkdev_reread_part], [
72*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
73*eda14cbcSMatt Macy		AC_DEFINE(HAVE_BLKDEV_REREAD_PART, 1,
74*eda14cbcSMatt Macy		    [blkdev_reread_part() exists])
75*eda14cbcSMatt Macy	], [
76*eda14cbcSMatt Macy		AC_MSG_RESULT(no)
77*eda14cbcSMatt Macy	])
78*eda14cbcSMatt Macy])
79*eda14cbcSMatt Macy
80*eda14cbcSMatt Macydnl #
81*eda14cbcSMatt Macydnl # 2.6.22 API change
82*eda14cbcSMatt Macydnl # Single argument invalidate_bdev()
83*eda14cbcSMatt Macydnl #
84*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV], [
85*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([invalidate_bdev], [
86*eda14cbcSMatt Macy		#include <linux/buffer_head.h>
87*eda14cbcSMatt Macy		#include <linux/blkdev.h>
88*eda14cbcSMatt Macy	],[
89*eda14cbcSMatt Macy		struct block_device *bdev = NULL;
90*eda14cbcSMatt Macy		invalidate_bdev(bdev);
91*eda14cbcSMatt Macy	])
92*eda14cbcSMatt Macy])
93*eda14cbcSMatt Macy
94*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV], [
95*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether invalidate_bdev() exists])
96*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT([invalidate_bdev], [
97*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
98*eda14cbcSMatt Macy	],[
99*eda14cbcSMatt Macy		ZFS_LINUX_TEST_ERROR([invalidate_bdev()])
100*eda14cbcSMatt Macy	])
101*eda14cbcSMatt Macy])
102*eda14cbcSMatt Macy
103*eda14cbcSMatt Macydnl #
104*eda14cbcSMatt Macydnl # 2.6.27, lookup_bdev() was exported.
105*eda14cbcSMatt Macydnl # 4.4.0-6.21 - lookup_bdev() takes 2 arguments.
106*eda14cbcSMatt Macydnl #
107*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV], [
108*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([lookup_bdev_1arg], [
109*eda14cbcSMatt Macy		#include <linux/fs.h>
110*eda14cbcSMatt Macy		#include <linux/blkdev.h>
111*eda14cbcSMatt Macy	], [
112*eda14cbcSMatt Macy		lookup_bdev(NULL);
113*eda14cbcSMatt Macy	])
114*eda14cbcSMatt Macy
115*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([lookup_bdev_2args], [
116*eda14cbcSMatt Macy		#include <linux/fs.h>
117*eda14cbcSMatt Macy	], [
118*eda14cbcSMatt Macy		lookup_bdev(NULL, FMODE_READ);
119*eda14cbcSMatt Macy	])
120*eda14cbcSMatt Macy])
121*eda14cbcSMatt Macy
122*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV], [
123*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether lookup_bdev() wants 1 arg])
124*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_1arg],
125*eda14cbcSMatt Macy	    [lookup_bdev], [fs/block_dev.c], [
126*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
127*eda14cbcSMatt Macy		AC_DEFINE(HAVE_1ARG_LOOKUP_BDEV, 1,
128*eda14cbcSMatt Macy		    [lookup_bdev() wants 1 arg])
129*eda14cbcSMatt Macy	], [
130*eda14cbcSMatt Macy		AC_MSG_RESULT(no)
131*eda14cbcSMatt Macy
132*eda14cbcSMatt Macy		AC_MSG_CHECKING([whether lookup_bdev() wants 2 args])
133*eda14cbcSMatt Macy		ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_2args],
134*eda14cbcSMatt Macy		    [lookup_bdev], [fs/block_dev.c], [
135*eda14cbcSMatt Macy			AC_MSG_RESULT(yes)
136*eda14cbcSMatt Macy			AC_DEFINE(HAVE_2ARGS_LOOKUP_BDEV, 1,
137*eda14cbcSMatt Macy			    [lookup_bdev() wants 2 args])
138*eda14cbcSMatt Macy		], [
139*eda14cbcSMatt Macy			ZFS_LINUX_TEST_ERROR([lookup_bdev()])
140*eda14cbcSMatt Macy		])
141*eda14cbcSMatt Macy	])
142*eda14cbcSMatt Macy])
143*eda14cbcSMatt Macy
144*eda14cbcSMatt Macydnl #
145*eda14cbcSMatt Macydnl # 2.6.30 API change
146*eda14cbcSMatt Macydnl #
147*eda14cbcSMatt Macydnl # The bdev_physical_block_size() interface was added to provide a way
148*eda14cbcSMatt Macydnl # to determine the smallest write which can be performed without a
149*eda14cbcSMatt Macydnl # read-modify-write operation.
150*eda14cbcSMatt Macydnl #
151*eda14cbcSMatt Macydnl # Unfortunately, this interface isn't entirely reliable because
152*eda14cbcSMatt Macydnl # drives are sometimes known to misreport this value.
153*eda14cbcSMatt Macydnl #
154*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
155*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([bdev_physical_block_size], [
156*eda14cbcSMatt Macy		#include <linux/blkdev.h>
157*eda14cbcSMatt Macy	],[
158*eda14cbcSMatt Macy		struct block_device *bdev __attribute__ ((unused)) = NULL;
159*eda14cbcSMatt Macy		bdev_physical_block_size(bdev);
160*eda14cbcSMatt Macy	])
161*eda14cbcSMatt Macy])
162*eda14cbcSMatt Macy
163*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
164*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether bdev_physical_block_size() is available])
165*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT([bdev_physical_block_size], [
166*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
167*eda14cbcSMatt Macy	],[
168*eda14cbcSMatt Macy		ZFS_LINUX_TEST_ERROR([bdev_physical_block_size()])
169*eda14cbcSMatt Macy	])
170*eda14cbcSMatt Macy])
171*eda14cbcSMatt Macy
172*eda14cbcSMatt Macydnl #
173*eda14cbcSMatt Macydnl # 2.6.30 API change
174*eda14cbcSMatt Macydnl # Added bdev_logical_block_size().
175*eda14cbcSMatt Macydnl #
176*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
177*eda14cbcSMatt Macy	ZFS_LINUX_TEST_SRC([bdev_logical_block_size], [
178*eda14cbcSMatt Macy		#include <linux/blkdev.h>
179*eda14cbcSMatt Macy	],[
180*eda14cbcSMatt Macy		struct block_device *bdev __attribute__ ((unused)) = NULL;
181*eda14cbcSMatt Macy		bdev_logical_block_size(bdev);
182*eda14cbcSMatt Macy	])
183*eda14cbcSMatt Macy])
184*eda14cbcSMatt Macy
185*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
186*eda14cbcSMatt Macy	AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
187*eda14cbcSMatt Macy	ZFS_LINUX_TEST_RESULT([bdev_logical_block_size], [
188*eda14cbcSMatt Macy		AC_MSG_RESULT(yes)
189*eda14cbcSMatt Macy	],[
190*eda14cbcSMatt Macy		ZFS_LINUX_TEST_ERROR([bdev_logical_block_size()])
191*eda14cbcSMatt Macy	])
192*eda14cbcSMatt Macy])
193*eda14cbcSMatt Macy
194*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV], [
195*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH
196*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_PUT
197*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART
198*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV
199*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV
200*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
201*eda14cbcSMatt Macy	ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
202*eda14cbcSMatt Macy])
203*eda14cbcSMatt Macy
204*eda14cbcSMatt MacyAC_DEFUN([ZFS_AC_KERNEL_BLKDEV], [
205*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
206*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_PUT
207*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_REREAD_PART
208*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV
209*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV
210*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
211*eda14cbcSMatt Macy	ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
212*eda14cbcSMatt Macy])
213