config/kernel-dentry-operations.m4

   1 dnl #
   2 dnl # 3.4.0 API change
   3 dnl # Added d_make_root() to replace previous d_alloc_root() function.
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_SRC_D_MAKE_ROOT], [
   6         ZFS_LINUX_TEST_SRC([d_make_root], [
   7                 #include <linux/dcache.h>
   8         ], [
   9                 d_make_root(NULL);
  10         ])
  11 ])
  12
  13 AC_DEFUN([ZFS_AC_KERNEL_D_MAKE_ROOT], [
  14         AC_MSG_CHECKING([whether d_make_root() is available])
  15         ZFS_LINUX_TEST_RESULT_SYMBOL([d_make_root],
  16             [d_make_root], [fs/dcache.c], [
  17                 AC_MSG_RESULT(yes)
  18                 AC_DEFINE(HAVE_D_MAKE_ROOT, 1, [d_make_root() is available])
  19         ], [
  20                 AC_MSG_RESULT(no)
  21         ])
  22 ])
  23
  24 dnl #
  25 dnl # 2.6.28 API change
  26 dnl # Added d_obtain_alias() helper function.
  27 dnl #
  28 AC_DEFUN([ZFS_AC_KERNEL_SRC_D_OBTAIN_ALIAS], [
  29         ZFS_LINUX_TEST_SRC([d_obtain_alias], [
  30                 #include <linux/dcache.h>
  31         ], [
  32                 d_obtain_alias(NULL);
  33         ])
  34 ])
  35
  36 AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS], [
  37         AC_MSG_CHECKING([whether d_obtain_alias() is available])
  38         ZFS_LINUX_TEST_RESULT_SYMBOL([d_obtain_alias],
  39             [d_obtain_alias], [fs/dcache.c], [
  40                 AC_MSG_RESULT(yes)
  41         ], [
  42                 ZFS_LINUX_TEST_ERROR([d_obtain_alias()])
  43         ])
  44 ])
  45
  46 dnl #
  47 dnl # 2.6.12 API change
  48 dnl # d_prune_aliases() helper function available.
  49 dnl #
  50 AC_DEFUN([ZFS_AC_KERNEL_SRC_D_PRUNE_ALIASES], [
  51         ZFS_LINUX_TEST_SRC([d_prune_aliases], [
  52                 #include <linux/dcache.h>
  53         ], [
  54                 struct inode *ip = NULL;
  55                 d_prune_aliases(ip);
  56         ])
  57 ])
  58
  59 AC_DEFUN([ZFS_AC_KERNEL_D_PRUNE_ALIASES], [
  60         AC_MSG_CHECKING([whether d_prune_aliases() is available])
  61         ZFS_LINUX_TEST_RESULT_SYMBOL([d_prune_aliases],
  62             [d_prune_aliases], [fs/dcache.c], [
  63                 AC_MSG_RESULT(yes)
  64                 AC_DEFINE(HAVE_D_PRUNE_ALIASES, 1,
  65                     [d_prune_aliases() is available])
  66         ], [
  67                 ZFS_LINUX_TEST_ERROR([d_prune_aliases()])
  68         ])
  69 ])
  70
  71 dnl #
  72 dnl # 2.6.38 API change
  73 dnl # Added d_set_d_op() helper function.
  74 dnl #
  75 AC_DEFUN([ZFS_AC_KERNEL_SRC_D_SET_D_OP], [
  76         ZFS_LINUX_TEST_SRC([d_set_d_op], [
  77                 #include <linux/dcache.h>
  78         ], [
  79                 d_set_d_op(NULL, NULL);
  80         ])
  81 ])
  82
  83 AC_DEFUN([ZFS_AC_KERNEL_D_SET_D_OP], [
  84         AC_MSG_CHECKING([whether d_set_d_op() is available])
  85         ZFS_LINUX_TEST_RESULT_SYMBOL([d_set_d_op],
  86             [d_set_d_op], [fs/dcache.c], [
  87                 AC_MSG_RESULT(yes)
  88         ], [
  89                 ZFS_LINUX_TEST_ERROR([d_set_d_op])
  90         ])
  91 ])
  92
  93 dnl #
  94 dnl # 3.6 API change
  95 dnl #
  96 AC_DEFUN([ZFS_AC_KERNEL_SRC_D_REVALIDATE_NAMEIDATA], [
  97         ZFS_LINUX_TEST_SRC([dentry_operations_revalidate], [
  98                 #include <linux/dcache.h>
  99                 #include <linux/sched.h>
 100
 101                 static int revalidate (struct dentry *dentry,
 102                     struct nameidata *nidata) { return 0; }
 103
 104                 static const struct dentry_operations
 105                     dops __attribute__ ((unused)) = {
 106                         .d_revalidate   = revalidate,
 107                 };
 108         ],[])
 109 ])
 110
 111 AC_DEFUN([ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA], [
 112         AC_MSG_CHECKING([whether dops->d_revalidate() takes struct nameidata])
 113         ZFS_LINUX_TEST_RESULT([dentry_operations_revalidate], [
 114                 AC_MSG_RESULT(yes)
 115                 AC_DEFINE(HAVE_D_REVALIDATE_NAMEIDATA, 1,
 116                     [dops->d_revalidate() operation takes nameidata])
 117         ],[
 118                 AC_MSG_RESULT(no)
 119         ])
 120 ])
 121
 122 dnl #
 123 dnl # 2.6.30 API change
 124 dnl # The 'struct dentry_operations' was constified in the dentry structure.
 125 dnl #
 126 AC_DEFUN([ZFS_AC_KERNEL_SRC_CONST_DENTRY_OPERATIONS], [
 127         ZFS_LINUX_TEST_SRC([dentry_operations_const], [
 128                 #include <linux/dcache.h>
 129
 130                 const struct dentry_operations test_d_op = {
 131                         .d_revalidate = NULL,
 132                 };
 133         ],[
 134                 struct dentry d __attribute__ ((unused));
 135                 d.d_op = &test_d_op;
 136         ])
 137 ])
 138
 139 AC_DEFUN([ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS], [
 140         AC_MSG_CHECKING([whether dentry uses const struct dentry_operations])
 141         ZFS_LINUX_TEST_RESULT([dentry_operations_const], [
 142                 AC_MSG_RESULT(yes)
 143                 AC_DEFINE(HAVE_CONST_DENTRY_OPERATIONS, 1,
 144                     [dentry uses const struct dentry_operations])
 145         ],[
 146                 ZFS_LINUX_TEST_ERROR([const dentry_operations])
 147         ])
 148 ])
 149
 150 dnl #
 151 dnl # 2.6.38 API change
 152 dnl # Added sb->s_d_op default dentry_operations member
 153 dnl #
 154 AC_DEFUN([ZFS_AC_KERNEL_SRC_S_D_OP], [
 155         ZFS_LINUX_TEST_SRC([super_block_s_d_op], [
 156                 #include <linux/fs.h>
 157         ],[
 158                 struct super_block sb __attribute__ ((unused));
 159                 sb.s_d_op = NULL;
 160         ])
 161 ])
 162
 163 AC_DEFUN([ZFS_AC_KERNEL_S_D_OP], [
 164         AC_MSG_CHECKING([whether super_block has s_d_op])
 165         ZFS_LINUX_TEST_RESULT([super_block_s_d_op], [
 166                 AC_MSG_RESULT(yes)
 167         ], [
 168                 ZFS_LINUX_TEST_ERROR([super_block s_d_op])
 169         ])
 170 ])
 171
 172 AC_DEFUN([ZFS_AC_KERNEL_SRC_DENTRY], [
 173         ZFS_AC_KERNEL_SRC_D_MAKE_ROOT
 174         ZFS_AC_KERNEL_SRC_D_OBTAIN_ALIAS
 175         ZFS_AC_KERNEL_SRC_D_PRUNE_ALIASES
 176         ZFS_AC_KERNEL_SRC_D_SET_D_OP
 177         ZFS_AC_KERNEL_SRC_D_REVALIDATE_NAMEIDATA
 178         ZFS_AC_KERNEL_SRC_CONST_DENTRY_OPERATIONS
 179         ZFS_AC_KERNEL_SRC_S_D_OP
 180 ])
 181
 182 AC_DEFUN([ZFS_AC_KERNEL_DENTRY], [
 183         ZFS_AC_KERNEL_D_MAKE_ROOT
 184         ZFS_AC_KERNEL_D_OBTAIN_ALIAS
 185         ZFS_AC_KERNEL_D_PRUNE_ALIASES
 186         ZFS_AC_KERNEL_D_SET_D_OP
 187         ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
 188         ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
 189         ZFS_AC_KERNEL_S_D_OP
 190 ])