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