1dnl #
2dnl # Check for generic io accounting interface.
3dnl #
4AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT], [
5	ZFS_LINUX_TEST_SRC([bdev_io_acct], [
6		#include <linux/blkdev.h>
7	], [
8		struct block_device *bdev = NULL;
9		struct bio *bio = NULL;
10		unsigned long passed_time = 0;
11		unsigned long start_time;
12
13		start_time = bdev_start_io_acct(bdev, bio_sectors(bio),
14		    bio_op(bio), passed_time);
15		bdev_end_io_acct(bdev, bio_op(bio), start_time);
16	])
17
18	ZFS_LINUX_TEST_SRC([disk_io_acct], [
19		#include <linux/blkdev.h>
20	], [
21		struct gendisk *disk = NULL;
22		struct bio *bio = NULL;
23		unsigned long start_time;
24
25		start_time = disk_start_io_acct(disk, bio_sectors(bio), bio_op(bio));
26		disk_end_io_acct(disk, bio_op(bio), start_time);
27	])
28
29	ZFS_LINUX_TEST_SRC([bio_io_acct], [
30		#include <linux/blkdev.h>
31	], [
32		struct bio *bio = NULL;
33		unsigned long start_time;
34
35		start_time = bio_start_io_acct(bio);
36		bio_end_io_acct(bio, start_time);
37	])
38
39	ZFS_LINUX_TEST_SRC([generic_acct_3args], [
40		#include <linux/bio.h>
41
42		void (*generic_start_io_acct_f)(int, unsigned long,
43		    struct hd_struct *) = &generic_start_io_acct;
44		void (*generic_end_io_acct_f)(int, struct hd_struct *,
45		    unsigned long) = &generic_end_io_acct;
46	], [
47		generic_start_io_acct(0, 0, NULL);
48		generic_end_io_acct(0, NULL, 0);
49	])
50
51	ZFS_LINUX_TEST_SRC([generic_acct_4args], [
52		#include <linux/bio.h>
53
54		void (*generic_start_io_acct_f)(struct request_queue *, int,
55		    unsigned long, struct hd_struct *) = &generic_start_io_acct;
56		void (*generic_end_io_acct_f)(struct request_queue *, int,
57		    struct hd_struct *, unsigned long) = &generic_end_io_acct;
58	], [
59		generic_start_io_acct(NULL, 0, 0, NULL);
60		generic_end_io_acct(NULL, 0, NULL, 0);
61	])
62])
63
64AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
65	dnl #
66	dnl # 5.19 API,
67	dnl #
68	dnl # disk_start_io_acct() and disk_end_io_acct() have been replaced by
69	dnl # bdev_start_io_acct() and bdev_end_io_acct().
70	dnl #
71	AC_MSG_CHECKING([whether generic bdev_*_io_acct() are available])
72	ZFS_LINUX_TEST_RESULT([bdev_io_acct], [
73		AC_MSG_RESULT(yes)
74		AC_DEFINE(HAVE_BDEV_IO_ACCT, 1, [bdev_*_io_acct() available])
75	], [
76		AC_MSG_RESULT(no)
77
78		dnl #
79		dnl # 5.12 API,
80		dnl #
81		dnl # bio_start_io_acct() and bio_end_io_acct() became GPL-exported
82		dnl # so use disk_start_io_acct() and disk_end_io_acct() instead
83		dnl #
84		AC_MSG_CHECKING([whether generic disk_*_io_acct() are available])
85		ZFS_LINUX_TEST_RESULT([disk_io_acct], [
86			AC_MSG_RESULT(yes)
87			AC_DEFINE(HAVE_DISK_IO_ACCT, 1, [disk_*_io_acct() available])
88		], [
89			AC_MSG_RESULT(no)
90
91			dnl #
92			dnl # 5.7 API,
93			dnl #
94			dnl # Added bio_start_io_acct() and bio_end_io_acct() helpers.
95			dnl #
96			AC_MSG_CHECKING([whether generic bio_*_io_acct() are available])
97			ZFS_LINUX_TEST_RESULT([bio_io_acct], [
98				AC_MSG_RESULT(yes)
99				AC_DEFINE(HAVE_BIO_IO_ACCT, 1, [bio_*_io_acct() available])
100			], [
101				AC_MSG_RESULT(no)
102
103				dnl #
104				dnl # 4.14 API,
105				dnl #
106				dnl # generic_start_io_acct/generic_end_io_acct now require
107				dnl # request_queue to be provided. No functional changes,
108				dnl # but preparation for inflight accounting.
109				dnl #
110				AC_MSG_CHECKING([whether generic_*_io_acct wants 4 args])
111				ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_4args],
112				    [generic_start_io_acct], [block/bio.c], [
113					AC_MSG_RESULT(yes)
114					AC_DEFINE(HAVE_GENERIC_IO_ACCT_4ARG, 1,
115					    [generic_*_io_acct() 4 arg available])
116				], [
117					AC_MSG_RESULT(no)
118
119					dnl #
120					dnl # 3.19 API addition
121					dnl #
122					dnl # torvalds/linux@394ffa50 allows us to increment
123					dnl # iostat counters without generic_make_request().
124					dnl #
125					AC_MSG_CHECKING(
126					    [whether generic_*_io_acct wants 3 args])
127					ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_3args],
128					    [generic_start_io_acct], [block/bio.c], [
129						AC_MSG_RESULT(yes)
130						AC_DEFINE(HAVE_GENERIC_IO_ACCT_3ARG, 1,
131						    [generic_*_io_acct() 3 arg available])
132					], [
133						AC_MSG_RESULT(no)
134					])
135				])
136			])
137		])
138	])
139])
140