config/kernel-vfs-rw-iterate.m4

   1 dnl #
   2 dnl # Linux 3.16 API
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_RW_ITERATE], [
   5         ZFS_LINUX_TEST_SRC([file_operations_rw], [
   6                 #include <linux/fs.h>
   7
   8                 ssize_t test_read(struct kiocb *kiocb, struct iov_iter *to)
   9                     { return 0; }
  10                 ssize_t test_write(struct kiocb *kiocb, struct iov_iter *from)
  11                     { return 0; }
  12
  13                 static const struct file_operations
  14                     fops __attribute__ ((unused)) = {
  15                     .read_iter = test_read,
  16                     .write_iter = test_write,
  17                 };
  18         ],[])
  19
  20         ZFS_LINUX_TEST_SRC([new_sync_rw], [
  21                 #include <linux/fs.h>
  22         ],[
  23                 ssize_t ret __attribute__ ((unused));
  24                 struct file *filp = NULL;
  25                 char __user *rbuf = NULL;
  26                 const char __user *wbuf = NULL;
  27                 size_t len = 0;
  28                 loff_t ppos;
  29
  30                 ret = new_sync_read(filp, rbuf, len, &ppos);
  31                 ret = new_sync_write(filp, wbuf, len, &ppos);
  32         ])
  33 ])
  34
  35 AC_DEFUN([ZFS_AC_KERNEL_VFS_RW_ITERATE], [
  36         AC_MSG_CHECKING([whether fops->read/write_iter() are available])
  37         ZFS_LINUX_TEST_RESULT([file_operations_rw], [
  38                 AC_MSG_RESULT(yes)
  39                 AC_DEFINE(HAVE_VFS_RW_ITERATE, 1,
  40                     [fops->read/write_iter() are available])
  41
  42                 dnl #
  43                 dnl # Linux 4.1 API
  44                 dnl #
  45                 AC_MSG_CHECKING([whether new_sync_read/write() are available])
  46                 ZFS_LINUX_TEST_RESULT([new_sync_rw], [
  47                         AC_MSG_RESULT(yes)
  48                         AC_DEFINE(HAVE_NEW_SYNC_READ, 1,
  49                             [new_sync_read()/new_sync_write() are available])
  50                 ],[
  51                         AC_MSG_RESULT(no)
  52                 ])
  53         ],[
  54                 AC_MSG_RESULT(no)
  55         ])
  56 ])
  57
  58 dnl #
  59 dnl # Linux 4.1.x API
  60 dnl #
  61 AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_GENERIC_WRITE_CHECKS], [
  62         ZFS_LINUX_TEST_SRC([generic_write_checks], [
  63                 #include <linux/fs.h>
  64         ],[
  65                 struct kiocb *iocb = NULL;
  66                 struct iov_iter *iov = NULL;
  67                 generic_write_checks(iocb, iov);
  68         ])
  69 ])
  70
  71 AC_DEFUN([ZFS_AC_KERNEL_VFS_GENERIC_WRITE_CHECKS], [
  72         AC_MSG_CHECKING([whether generic_write_checks() takes kiocb])
  73         ZFS_LINUX_TEST_RESULT([generic_write_checks], [
  74                 AC_MSG_RESULT(yes)
  75                 AC_DEFINE(HAVE_GENERIC_WRITE_CHECKS_KIOCB, 1,
  76                     [generic_write_checks() takes kiocb])
  77         ],[
  78                 AC_MSG_RESULT(no)
  79         ])
  80 ])