config/kernel-make-request-fn.m4

   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
  54 AC_DEFUN([ZFS_AC_KERNEL_MAKE_REQUEST_FN], [
  55         dnl # Checked as part of the blk_alloc_queue_request_fn test
  56         dnl #
  57         dnl # Linux 5.9 API Change
  58         dnl # make_request_fn was moved into block_device_operations->submit_bio
  59         dnl #
  60         AC_MSG_CHECKING([whether submit_bio is member of struct block_device_operations])
  61         ZFS_LINUX_TEST_RESULT([block_device_operations_submit_bio], [
  62                 AC_MSG_RESULT(yes)
  63
  64                 AC_DEFINE(HAVE_SUBMIT_BIO_IN_BLOCK_DEVICE_OPERATIONS, 1,
  65                     [submit_bio is member of struct block_device_operations])
  66
  67                 dnl #
  68                 dnl # Linux 5.14 API Change:
  69                 dnl # blk_alloc_queue() + alloc_disk() combo replaced by
  70                 dnl # a single call to blk_alloc_disk().
  71                 dnl #
  72                 AC_MSG_CHECKING([whether blk_alloc_disk() exists])
  73                 ZFS_LINUX_TEST_RESULT([blk_alloc_disk], [
  74                         AC_MSG_RESULT(yes)
  75                         AC_DEFINE([HAVE_BLK_ALLOC_DISK], 1, [blk_alloc_disk() exists])
  76                 ], [
  77                         AC_MSG_RESULT(no)
  78                 ])
  79         ],[
  80                 AC_MSG_RESULT(no)
  81
  82                 dnl # Checked as part of the blk_alloc_queue_request_fn test
  83                 dnl #
  84                 dnl # Linux 5.7 API Change
  85                 dnl # blk_alloc_queue() expects request function.
  86                 dnl #
  87                 AC_MSG_CHECKING([whether blk_alloc_queue() expects request function])
  88                 ZFS_LINUX_TEST_RESULT([blk_alloc_queue_request_fn], [
  89                         AC_MSG_RESULT(yes)
  90
  91                         dnl # This is currently always the case.
  92                         AC_MSG_CHECKING([whether make_request_fn() returns blk_qc_t])
  93                         AC_MSG_RESULT(yes)
  94
  95                         AC_DEFINE(HAVE_BLK_ALLOC_QUEUE_REQUEST_FN, 1,
  96                             [blk_alloc_queue() expects request function])
  97                         AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t,
  98                             [make_request_fn() return type])
  99                         AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1,
 100                             [Noting that make_request_fn() returns blk_qc_t])
 101                 ],[
 102                         dnl #
 103                         dnl # CentOS Stream 4.18.0-257 API Change
 104                         dnl # The Linux 5.7 blk_alloc_queue() change was back-
 105                         dnl # ported and the symbol renamed blk_alloc_queue_rh().
 106                         dnl # As of this kernel version they're not providing
 107                         dnl # any compatibility code in the kernel for this.
 108                         dnl #
 109                         ZFS_LINUX_TEST_RESULT([blk_alloc_queue_request_fn_rh], [
 110                                 AC_MSG_RESULT(yes)
 111
 112                                 dnl # This is currently always the case.
 113                                 AC_MSG_CHECKING([whether make_request_fn_rh() returns blk_qc_t])
 114                                 AC_MSG_RESULT(yes)
 115
 116                                 AC_DEFINE(HAVE_BLK_ALLOC_QUEUE_REQUEST_FN_RH, 1,
 117                                     [blk_alloc_queue_rh() expects request function])
 118                                 AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t,
 119                                     [make_request_fn() return type])
 120                                 AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1,
 121                                     [Noting that make_request_fn() returns blk_qc_t])
 122                         ],[
 123                                 AC_MSG_RESULT(no)
 124
 125                                 dnl #
 126                                 dnl # Linux 3.2 API Change
 127                                 dnl # make_request_fn returns void.
 128                                 dnl #
 129                                 AC_MSG_CHECKING(
 130                                     [whether make_request_fn() returns void])
 131                                 ZFS_LINUX_TEST_RESULT([make_request_fn_void], [
 132                                         AC_MSG_RESULT(yes)
 133                                         AC_DEFINE(MAKE_REQUEST_FN_RET, void,
 134                                             [make_request_fn() return type])
 135                                         AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_VOID, 1,
 136                                             [Noting that make_request_fn() returns void])
 137                                 ],[
 138                                         AC_MSG_RESULT(no)
 139
 140                                         dnl #
 141                                         dnl # Linux 4.4 API Change
 142                                         dnl # make_request_fn returns blk_qc_t.
 143                                         dnl #
 144                                         AC_MSG_CHECKING(
 145                                             [whether make_request_fn() returns blk_qc_t])
 146                                         ZFS_LINUX_TEST_RESULT([make_request_fn_blk_qc_t], [
 147                                                 AC_MSG_RESULT(yes)
 148                                                 AC_DEFINE(MAKE_REQUEST_FN_RET, blk_qc_t,
 149                                                     [make_request_fn() return type])
 150                                                 AC_DEFINE(HAVE_MAKE_REQUEST_FN_RET_QC, 1,
 151                                                     [Noting that make_request_fn() ]
 152                                                     [returns blk_qc_t])
 153                                         ],[
 154                                                 ZFS_LINUX_TEST_ERROR([make_request_fn])
 155                                         ])
 156                                 ])
 157                         ])
 158                 ])
 159         ])
 160 ])