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dnl #
dnl # Linux 2.6.38 - 3.x API
dnl # The fallocate callback was moved from the inode_operations
dnl # structure to the file_operations structure.
dnl #
dnl #
dnl # Linux 3.15+
dnl # fallocate learned a new flag, FALLOC_FL_ZERO_RANGE
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_FALLOCATE], [
ZFS_LINUX_TEST_SRC([file_fallocate], [
#include <linux/fs.h>
long test_fallocate(struct file *file, int mode,
loff_t offset, loff_t len) { return 0; }
static const struct file_operations
fops __attribute__ ((unused)) = {
.fallocate = test_fallocate,
};
], [])
ZFS_LINUX_TEST_SRC([falloc_fl_zero_range], [
#include <linux/falloc.h>
],[
int flags __attribute__ ((unused));
flags = FALLOC_FL_ZERO_RANGE;
])
])
AC_DEFUN([ZFS_AC_KERNEL_FALLOCATE], [
AC_MSG_CHECKING([whether fops->fallocate() exists])
ZFS_LINUX_TEST_RESULT([file_fallocate], [
AC_MSG_RESULT(yes)
AC_MSG_CHECKING([whether FALLOC_FL_ZERO_RANGE exists])
ZFS_LINUX_TEST_RESULT([falloc_fl_zero_range], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FALLOC_FL_ZERO_RANGE, 1, [FALLOC_FL_ZERO_RANGE is defined])
],[
AC_MSG_RESULT(no)
])
],[
ZFS_LINUX_TEST_ERROR([file_fallocate])
])
])
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