config/kernel-fallocate.m4

   1 dnl #
   2 dnl # Linux 2.6.38 - 3.x API
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_FILE_FALLOCATE], [
   5         AC_MSG_CHECKING([whether fops->fallocate() exists])
   6         ZFS_LINUX_TRY_COMPILE([
   7                 #include <linux/fs.h>
   8         ],[
   9                 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
  10                 struct file_operations fops __attribute__ ((unused)) = {
  11                         .fallocate = fallocate,
  12                 };
  13         ],[
  14                 AC_MSG_RESULT(yes)
  15                 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
  16         ],[
  17                 AC_MSG_RESULT(no)
  18         ])
  19 ])
  20
  21 dnl #
  22 dnl # Linux 2.6.x - 2.6.37 API
  23 dnl #
  24 AC_DEFUN([ZFS_AC_KERNEL_INODE_FALLOCATE], [
  25         AC_MSG_CHECKING([whether iops->fallocate() exists])
  26         ZFS_LINUX_TRY_COMPILE([
  27                 #include <linux/fs.h>
  28         ],[
  29                 long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
  30                 struct inode_operations fops __attribute__ ((unused)) = {
  31                         .fallocate = fallocate,
  32                 };
  33         ],[
  34                 AC_MSG_RESULT(yes)
  35                 AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
  36         ],[
  37                 AC_MSG_RESULT(no)
  38         ])
  39 ])
  40
  41 dnl #
  42 dnl # The fallocate callback was moved from the inode_operations
  43 dnl # structure to the file_operations structure.
  44 dnl #
  45 AC_DEFUN([ZFS_AC_KERNEL_FALLOCATE], [
  46         ZFS_AC_KERNEL_FILE_FALLOCATE
  47         ZFS_AC_KERNEL_INODE_FALLOCATE
  48 ])