1dnl # 2dnl # Check for generic io accounting interface. 3dnl # 4AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT], [ 5 ZFS_LINUX_TEST_SRC([generic_acct_3args], [ 6 #include <linux/bio.h> 7 8 void (*generic_start_io_acct_f)(int, unsigned long, 9 struct hd_struct *) = &generic_start_io_acct; 10 void (*generic_end_io_acct_f)(int, struct hd_struct *, 11 unsigned long) = &generic_end_io_acct; 12 ], [ 13 generic_start_io_acct(0, 0, NULL); 14 generic_end_io_acct(0, NULL, 0); 15 ]) 16 17 ZFS_LINUX_TEST_SRC([generic_acct_4args], [ 18 #include <linux/bio.h> 19 20 void (*generic_start_io_acct_f)(struct request_queue *, int, 21 unsigned long, struct hd_struct *) = &generic_start_io_acct; 22 void (*generic_end_io_acct_f)(struct request_queue *, int, 23 struct hd_struct *, unsigned long) = &generic_end_io_acct; 24 ], [ 25 generic_start_io_acct(NULL, 0, 0, NULL); 26 generic_end_io_acct(NULL, 0, NULL, 0); 27 ]) 28]) 29 30AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [ 31 dnl # 32 dnl # 3.19 API addition 33 dnl # 34 dnl # torvalds/linux@394ffa50 allows us to increment iostat 35 dnl # counters without generic_make_request(). 36 dnl # 37 AC_MSG_CHECKING([whether generic IO accounting wants 3 args]) 38 ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_3args], 39 [generic_start_io_acct], [block/bio.c], [ 40 AC_MSG_RESULT(yes) 41 AC_DEFINE(HAVE_GENERIC_IO_ACCT_3ARG, 1, 42 [generic_start_io_acct()/generic_end_io_acct() available]) 43 ], [ 44 AC_MSG_RESULT(no) 45 46 dnl # 47 dnl # Linux 4.14 API, 48 dnl # 49 dnl # generic_start_io_acct/generic_end_io_acct now require 50 dnl # request_queue to be provided. No functional changes, 51 dnl # but preparation for inflight accounting. 52 dnl # 53 AC_MSG_CHECKING([whether generic IO accounting wants 4 args]) 54 ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_4args], 55 [generic_start_io_acct], [block/bio.c], [ 56 AC_MSG_RESULT(yes) 57 AC_DEFINE(HAVE_GENERIC_IO_ACCT_4ARG, 1, 58 [generic_start_io_acct()/generic_end_io_acct() ] 59 [4 arg available]) 60 ], [ 61 AC_MSG_RESULT(no) 62 ]) 63 ]) 64]) 65