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dnl #
dnl # Linux 3.16 API
dnl #
AC_DEFUN([ZFS_AC_KERNEL_VFS_RW_ITERATE],
[AC_MSG_CHECKING([whether fops->read/write_iter() are available])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
ssize_t test_read(struct kiocb *kiocb, struct iov_iter *to)
{ return 0; }
ssize_t test_write(struct kiocb *kiocb, struct iov_iter *from)
{ return 0; }
static const struct file_operations
fops __attribute__ ((unused)) = {
.read_iter = test_read,
.write_iter = test_write,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VFS_RW_ITERATE, 1,
[fops->read/write_iter() are available])
ZFS_AC_KERNEL_NEW_SYNC_READ
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 4.1 API
dnl #
AC_DEFUN([ZFS_AC_KERNEL_NEW_SYNC_READ],
[AC_MSG_CHECKING([whether new_sync_read/write() are available])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
ssize_t ret __attribute__ ((unused));
struct file *filp = NULL;
char __user *rbuf = NULL;
const char __user *wbuf = NULL;
size_t len = 0;
loff_t ppos;
ret = new_sync_read(filp, rbuf, len, &ppos);
ret = new_sync_write(filp, wbuf, len, &ppos);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_NEW_SYNC_READ, 1,
[new_sync_read()/new_sync_write() are available])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 4.1.x API
dnl #
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_WRITE_CHECKS],
[AC_MSG_CHECKING([whether generic_write_checks() takes kiocb])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct kiocb *iocb = NULL;
struct iov_iter *iov = NULL;
generic_write_checks(iocb, iov);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_WRITE_CHECKS_KIOCB, 1,
[generic_write_checks() takes kiocb])
],[
AC_MSG_RESULT(no)
])
])
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