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 test_fallocate(struct file *file, int mode,
  10                     loff_t offset, loff_t len) { return 0; }
  11
  12                 static const struct file_operations
  13                     fops __attribute__ ((unused)) = {
  14                         .fallocate = test_fallocate,
  15                 };
  16         ],[
  17         ],[
  18                 AC_MSG_RESULT(yes)
  19                 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
  20         ],[
  21                 AC_MSG_RESULT(no)
  22         ])
  23 ])
  24
  25 dnl #
  26 dnl # Linux 2.6.x - 2.6.37 API
  27 dnl #
  28 AC_DEFUN([ZFS_AC_KERNEL_INODE_FALLOCATE], [
  29         AC_MSG_CHECKING([whether iops->fallocate() exists])
  30         ZFS_LINUX_TRY_COMPILE([
  31                 #include <linux/fs.h>
  32
  33                 long test_fallocate(struct inode *inode, int mode,
  34                     loff_t offset, loff_t len) { return 0; }
  35
  36                 static const struct inode_operations
  37                     fops __attribute__ ((unused)) = {
  38                         .fallocate = test_fallocate,
  39                 };
  40         ],[
  41         ],[
  42                 AC_MSG_RESULT(yes)
  43                 AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
  44         ],[
  45                 AC_MSG_RESULT(no)
  46         ])
  47 ])
  48
  49 dnl #
  50 dnl # The fallocate callback was moved from the inode_operations
  51 dnl # structure to the file_operations structure.
  52 dnl #
  53 AC_DEFUN([ZFS_AC_KERNEL_FALLOCATE], [
  54         ZFS_AC_KERNEL_FILE_FALLOCATE
  55         ZFS_AC_KERNEL_INODE_FALLOCATE
  56 ])