Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/config/kernel-make-request-fn.m4
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1 dnl # 2 dnl # Check for make_request_fn interface. 3 dnl # 4 AC_DEFUN([ZFS_AC_KERNEL_SRC_MAKE_REQUEST_FN], [ 5 ZFS_LINUX_TEST_SRC([make_request_fn_void], [ 6 #include <linux/blkdev.h> 7 void make_request(struct request_queue *q, 8 struct bio *bio) { return; } 9 ],[ 10 blk_queue_make_request(NULL, &make_request); 11 ]) 12 13 ZFS_LINUX_TEST_SRC([make_request_fn_blk_qc_t], [ 14 #include <linux/blkdev.h> 15 blk_qc_t make_request(struct request_queue *q, 16 struct bio *bio) { return (BLK_QC_T_NONE); } 17 ],[ 18 blk_queue_make_request(NULL, &make_request); 19 ]) 20 21 ZFS_LINUX_TEST_SRC([blk_alloc_queue_request_fn], [ 22 #include <linux/blkdev.h> 23 blk_qc_t make_request(struct request_queue *q, 24 struct bio *bio) { return (BLK_QC_T_NONE); } 25 ],[ 26 struct request_queue *q __attribute__ ((unused)); 27 q = blk_alloc_queue(make_request, NUMA_NO_NODE); 28 ]) 29 30 ZFS_LINUX_TEST_SRC([blk_alloc_queue_request_fn_rh], [ 31 #include <linux/blkdev.h> 32 blk_qc_t make_request(struct request_queue *q, 33 struct bio *bio) { return (BLK_QC_T_NONE); } 34 ],[ 35 struct request_queue *q __attribute__ ((unused)); 36 q = blk_alloc_queue_rh(make_request, NUMA_NO_NODE); 37 ]) 38 39 ZFS_LINUX_TEST_SRC([block_device_operations_submit_bio], [ 40 #include <linux/blkdev.h> 41 ],[ 42 struct block_device_operations o; 43 o.submit_bio = NULL; 44 ]) 45 46 ZFS_LINUX_TEST_SRC([blk_alloc_disk], [ 47 #include <linux/blkdev.h> 48 ],[ 49 struct gendisk *disk __attribute__ ((unused)); 50 disk = blk_alloc_disk(NUMA_NO_NODE); 51 ]) 52 53 ZFS_LINUX_TEST_SRC([blk_cleanup_disk], [ 54 #include <linux/blkdev.h> 55 ],[ 56 struct gendisk *disk __attribute__ ((unused)); 57 blk_cleanup_disk(disk); 58 ]) 59 ]) 60 61 AC_DEFUN([ZFS_AC_KERNEL_MAKE_REQUEST_FN], [ 62 dnl # Checked as part of the blk_alloc_queue_request_fn test 63 dnl # 64 dnl # Linux 5.9 API Change 65 dnl # make_request_fn was moved into block_device_operations->submit_bio 66 dnl # 67 AC_MSG_CHECKING([whether submit_bio is member of struct block_device_operations]) 68 ZFS_LINUX_TEST_RESULT([block_device_operations_submit_bio], [ 69 AC_MSG_RESULT(yes) 70 71 AC_DEFINE(HAVE_SUBMIT_BIO_IN_BLOCK_DEVICE_OPERATIONS, 1, 72 [submit_bio is member of struct block_device_operations]) 73 74 dnl # 75 dnl # Linux 5.14 API Change: 76 dnl # blk_alloc_queue() + alloc_disk() combo replaced by 77 dnl # a single call to blk_alloc_disk(). 78 dnl # 79 AC_MSG_CHECKING([whether blk_alloc_disk() exists]) 80 ZFS_LINUX_TEST_RESULT([blk_alloc_disk], [ 81 AC_MSG_RESULT(yes) 82 AC_DEFINE([HAVE_BLK_ALLOC_DISK], 1, [blk_alloc_disk() exists]) 83 84 dnl # 85 dnl # 5.20 API change, 86 dnl # Removed blk_cleanup_disk(), put_disk() should be used. 87 dnl # 88 AC_MSG_CHECKING([whether blk_cleanup_disk() exists]) 89 ZFS_LINUX_TEST_RESULT([blk_cleanup_disk], [ 90 AC_MSG_RESULT(yes) 91 AC_DEFINE([HAVE_BLK_CLEANUP_DISK], 1, 92 [blk_cleanup_disk() exists]) 93 ], [ 94 AC_MSG_RESULT(no) 95 ]) 96 ], [ 97 AC_MSG_RESULT(no) 98 ]) 99 ],[ 100 AC_MSG_RESULT(no) 101 102 dnl # Checked as part of the blk_alloc_queue_request_fn test 103 dnl # 104 dnl # Linux 5.7 API Change 105 dnl # blk_alloc_queue() expects request function. 106 dnl # 107 AC_MSG_CHECKING([whether blk_alloc_queue() expects request function]) 108 ZFS_LINUX_TEST_RESULT([blk_alloc_queue_request_fn], [ 109 AC_MSG_RESULT(yes) 110 111 dnl # This is currently always the case. 112 AC_MSG_CHECKING([whether make_request_fn() returns blk_qc_t]) 113 AC_MSG_RESULT(yes) 114 115 AC_DEFINE(HAVE_BLK_ALLOC_QUEUE_REQUEST_FN, 1, 116 [blk_alloc_queue() expects request function]) 117 AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t, 118 [make_request_fn() return type]) 119 AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1, 120 [Noting that make_request_fn() returns blk_qc_t]) 121 ],[ 122 dnl # 123 dnl # CentOS Stream 4.18.0-257 API Change 124 dnl # The Linux 5.7 blk_alloc_queue() change was back- 125 dnl # ported and the symbol renamed blk_alloc_queue_rh(). 126 dnl # As of this kernel version they're not providing 127 dnl # any compatibility code in the kernel for this. 128 dnl # 129 ZFS_LINUX_TEST_RESULT([blk_alloc_queue_request_fn_rh], [ 130 AC_MSG_RESULT(yes) 131 132 dnl # This is currently always the case. 133 AC_MSG_CHECKING([whether make_request_fn_rh() returns blk_qc_t]) 134 AC_MSG_RESULT(yes) 135 136 AC_DEFINE(HAVE_BLK_ALLOC_QUEUE_REQUEST_FN_RH, 1, 137 [blk_alloc_queue_rh() expects request function]) 138 AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t, 139 [make_request_fn() return type]) 140 AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1, 141 [Noting that make_request_fn() returns blk_qc_t]) 142 ],[ 143 AC_MSG_RESULT(no) 144 145 dnl # 146 dnl # Linux 3.2 API Change 147 dnl # make_request_fn returns void. 148 dnl # 149 AC_MSG_CHECKING( 150 [whether make_request_fn() returns void]) 151 ZFS_LINUX_TEST_RESULT([make_request_fn_void], [ 152 AC_MSG_RESULT(yes) 153 AC_DEFINE(MAKE_REQUEST_FN_RET, void, 154 [make_request_fn() return type]) 155 AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_VOID, 1, 156 [Noting that make_request_fn() returns void]) 157 ],[ 158 AC_MSG_RESULT(no) 159 160 dnl # 161 dnl # Linux 4.4 API Change 162 dnl # make_request_fn returns blk_qc_t. 163 dnl # 164 AC_MSG_CHECKING( 165 [whether make_request_fn() returns blk_qc_t]) 166 ZFS_LINUX_TEST_RESULT([make_request_fn_blk_qc_t], [ 167 AC_MSG_RESULT(yes) 168 AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t, 169 [make_request_fn() return type]) 170 AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1, 171 [Noting that make_request_fn() ] 172 [returns blk_qc_t]) 173 ],[ 174 ZFS_LINUX_TEST_ERROR([make_request_fn]) 175 ]) 176 ]) 177 ]) 178 ]) 179 ]) 180 ])
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