config/kernel-put-link.m4

   1 dnl #
   2 dnl # Supported symlink APIs
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_SRC_PUT_LINK], [
   5         ZFS_LINUX_TEST_SRC([put_link_cookie], [
   6                 #include <linux/fs.h>
   7                 static void put_link(struct inode *ip, void *cookie)
   8                     { return; }
   9                 static struct inode_operations
  10                     iops __attribute__ ((unused)) = {
  11                         .put_link = put_link,
  12                 };
  13         ],[])
  14
  15         ZFS_LINUX_TEST_SRC([put_link_nameidata], [
  16                 #include <linux/fs.h>
  17                 static void put_link(struct dentry *de, struct
  18                     nameidata *nd, void *ptr) { return; }
  19                 static struct inode_operations
  20                     iops __attribute__ ((unused)) = {
  21                         .put_link = put_link,
  22                 };
  23         ],[])
  24 ])
  25
  26 AC_DEFUN([ZFS_AC_KERNEL_PUT_LINK], [
  27         dnl #
  28         dnl # 4.5 API change
  29         dnl # get_link() uses delayed done, there is no put_link() interface.
  30         dnl # This check initially uses the inode_operations_get_link result
  31         dnl #
  32         ZFS_LINUX_TEST_RESULT([inode_operations_get_link], [
  33                 AC_DEFINE(HAVE_PUT_LINK_DELAYED, 1, [iops->put_link() delayed])
  34         ],[
  35                 dnl #
  36                 dnl # 4.2 API change
  37                 dnl # This kernel retired the nameidata structure.
  38                 dnl #
  39                 AC_MSG_CHECKING([whether iops->put_link() passes cookie])
  40                 ZFS_LINUX_TEST_RESULT([put_link_cookie], [
  41                         AC_MSG_RESULT(yes)
  42                         AC_DEFINE(HAVE_PUT_LINK_COOKIE, 1,
  43                             [iops->put_link() cookie])
  44                 ],[
  45                         AC_MSG_RESULT(no)
  46
  47                         dnl #
  48                         dnl # 2.6.32 API
  49                         dnl #
  50                         AC_MSG_CHECKING(
  51                             [whether iops->put_link() passes nameidata])
  52                         ZFS_LINUX_TEST_RESULT([put_link_nameidata], [
  53                                 AC_MSG_RESULT(yes)
  54                                 AC_DEFINE(HAVE_PUT_LINK_NAMEIDATA, 1,
  55                                     [iops->put_link() nameidata])
  56                         ],[
  57                                 ZFS_LINUX_TEST_ERROR([put_link])
  58                         ])
  59                 ])
  60         ])
  61 ])