config/kernel-acl.m4

   1 dnl #
   2 dnl # Check if posix_acl_release can be used from a ZFS_META_LICENSED
   3 dnl # module.  The is_owner_or_cap macro was replaced by
   4 dnl # inode_owner_or_capable
   5 dnl #
   6 AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_RELEASE], [
   7         AC_MSG_CHECKING([whether posix_acl_release() is available])
   8         ZFS_LINUX_TRY_COMPILE([
   9                 #include <linux/cred.h>
  10                 #include <linux/fs.h>
  11                 #include <linux/posix_acl.h>
  12         ],[
  13                 struct posix_acl* tmp = posix_acl_alloc(1, 0);
  14                 posix_acl_release(tmp);
  15         ],[
  16                 AC_MSG_RESULT(yes)
  17                 AC_DEFINE(HAVE_POSIX_ACL_RELEASE, 1,
  18                     [posix_acl_release() is available])
  19
  20                 AC_MSG_CHECKING([whether posix_acl_release() is GPL-only])
  21                 ZFS_LINUX_TRY_COMPILE([
  22                         #include <linux/module.h>
  23                         #include <linux/cred.h>
  24                         #include <linux/fs.h>
  25                         #include <linux/posix_acl.h>
  26
  27                         MODULE_LICENSE("$ZFS_META_LICENSE");
  28                 ],[
  29                         struct posix_acl* tmp = posix_acl_alloc(1, 0);
  30                         posix_acl_release(tmp);
  31                 ],[
  32                         AC_MSG_RESULT(no)
  33                 ],[
  34                         AC_MSG_RESULT(yes)
  35                         AC_DEFINE(HAVE_POSIX_ACL_RELEASE_GPL_ONLY, 1,
  36                             [posix_acl_release() is GPL-only])
  37                 ])
  38         ],[
  39                 AC_MSG_RESULT(no)
  40         ])
  41 ])
  42
  43 dnl #
  44 dnl # 3.14 API change,
  45 dnl # set_cached_acl() and forget_cached_acl() changed from inline to
  46 dnl # EXPORT_SYMBOL. In the former case, they may not be usable because of
  47 dnl # posix_acl_release. In the latter case, we can always use them.
  48 dnl #
  49 AC_DEFUN([ZFS_AC_KERNEL_SET_CACHED_ACL_USABLE], [
  50         AC_MSG_CHECKING([whether set_cached_acl() is usable])
  51         ZFS_LINUX_TRY_COMPILE([
  52                 #include <linux/module.h>
  53                 #include <linux/cred.h>
  54                 #include <linux/fs.h>
  55                 #include <linux/posix_acl.h>
  56
  57                 MODULE_LICENSE("$ZFS_META_LICENSE");
  58         ],[
  59                 struct inode *ip = NULL;
  60                 struct posix_acl *acl = posix_acl_alloc(1, 0);
  61                 set_cached_acl(ip, ACL_TYPE_ACCESS, acl);
  62                 forget_cached_acl(ip, ACL_TYPE_ACCESS);
  63         ],[
  64                 AC_MSG_RESULT(yes)
  65                 AC_DEFINE(HAVE_SET_CACHED_ACL_USABLE, 1,
  66                     [posix_acl_release() is usable])
  67         ],[
  68                 AC_MSG_RESULT(no)
  69         ])
  70 ])
  71
  72 dnl #
  73 dnl # 3.1 API change,
  74 dnl # posix_acl_chmod_masq() is not exported anymore and posix_acl_chmod()
  75 dnl # was introduced to replace it.
  76 dnl #
  77 dnl # 3.14 API change,
  78 dnl # posix_acl_chmod() is changed to __posix_acl_chmod()
  79 dnl #
  80 AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_CHMOD], [
  81         AC_MSG_CHECKING([whether posix_acl_chmod exists])
  82         ZFS_LINUX_TRY_COMPILE([
  83                 #include <linux/fs.h>
  84                 #include <linux/posix_acl.h>
  85         ],[
  86                 posix_acl_chmod(NULL, 0, 0)
  87         ],[
  88                 AC_MSG_RESULT(yes)
  89                 AC_DEFINE(HAVE_POSIX_ACL_CHMOD, 1, [posix_acl_chmod() exists])
  90         ],[
  91                 AC_MSG_RESULT(no)
  92         ])
  93
  94         AC_MSG_CHECKING([whether __posix_acl_chmod exists])
  95         ZFS_LINUX_TRY_COMPILE([
  96                 #include <linux/fs.h>
  97                 #include <linux/posix_acl.h>
  98         ],[
  99                 __posix_acl_chmod(NULL, 0, 0)
 100         ],[
 101                 AC_MSG_RESULT(yes)
 102                 AC_DEFINE(HAVE___POSIX_ACL_CHMOD, 1, [__posix_acl_chmod() exists])
 103         ],[
 104                 AC_MSG_RESULT(no)
 105         ])
 106 ])
 107
 108 dnl #
 109 dnl # 3.1 API change,
 110 dnl # posix_acl_equiv_mode now wants an umode_t* instead of a mode_t*
 111 dnl #
 112 AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T], [
 113         AC_MSG_CHECKING([whether posix_acl_equiv_mode() wants umode_t])
 114         ZFS_LINUX_TRY_COMPILE([
 115                 #include <linux/fs.h>
 116                 #include <linux/posix_acl.h>
 117         ],[
 118                 umode_t tmp;
 119                 posix_acl_equiv_mode(NULL,&tmp);
 120         ],[
 121                 AC_MSG_RESULT(yes)
 122                 AC_DEFINE(HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T, 1,
 123                     [ posix_acl_equiv_mode wants umode_t*])
 124         ],[
 125                 AC_MSG_RESULT(no)
 126         ])
 127 ])
 128
 129 dnl #
 130 dnl # 4.8 API change,
 131 dnl # The function posix_acl_valid now must be passed a namespace.
 132 dnl #
 133 AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS], [
 134         AC_MSG_CHECKING([whether posix_acl_valid() wants user namespace])
 135         ZFS_LINUX_TRY_COMPILE([
 136                 #include <linux/fs.h>
 137                 #include <linux/posix_acl.h>
 138         ],[
 139                 struct user_namespace *user_ns = NULL;
 140                 const struct posix_acl *acl = NULL;
 141                 int error;
 142
 143                 error = posix_acl_valid(user_ns, acl);
 144         ],[
 145                 AC_MSG_RESULT(yes)
 146                 AC_DEFINE(HAVE_POSIX_ACL_VALID_WITH_NS, 1,
 147                     [posix_acl_valid() wants user namespace])
 148         ],[
 149                 AC_MSG_RESULT(no)
 150         ])
 151 ])
 152
 153 dnl #
 154 dnl # 2.6.27 API change,
 155 dnl # Check if inode_operations contains the function permission
 156 dnl # and expects the nameidata structure to have been removed.
 157 dnl #
 158 AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION], [
 159         AC_MSG_CHECKING([whether iops->permission() exists])
 160         ZFS_LINUX_TRY_COMPILE([
 161                 #include <linux/fs.h>
 162
 163                 int permission_fn(struct inode *inode, int mask) { return 0; }
 164
 165                 static const struct inode_operations
 166                     iops __attribute__ ((unused)) = {
 167                         .permission = permission_fn,
 168                 };
 169         ],[
 170         ],[
 171                 AC_MSG_RESULT(yes)
 172                 AC_DEFINE(HAVE_PERMISSION, 1, [iops->permission() exists])
 173         ],[
 174                 AC_MSG_RESULT(no)
 175         ])
 176 ])
 177
 178 dnl #
 179 dnl # 2.6.26 API change,
 180 dnl # Check if inode_operations contains the function permission
 181 dnl # and expects the nameidata structure to be passed.
 182 dnl #
 183 AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION_WITH_NAMEIDATA], [
 184         AC_MSG_CHECKING([whether iops->permission() wants nameidata])
 185         ZFS_LINUX_TRY_COMPILE([
 186                 #include <linux/fs.h>
 187
 188                 int permission_fn(struct inode *inode, int mask,
 189                     struct nameidata *nd) { return 0; }
 190
 191                 static const struct inode_operations
 192                     iops __attribute__ ((unused)) = {
 193                         .permission = permission_fn,
 194                 };
 195         ],[
 196         ],[
 197                 AC_MSG_RESULT(yes)
 198                 AC_DEFINE(HAVE_PERMISSION, 1, [iops->permission() exists])
 199                 AC_DEFINE(HAVE_PERMISSION_WITH_NAMEIDATA, 1,
 200                     [iops->permission() with nameidata exists])
 201         ],[
 202                 AC_MSG_RESULT(no)
 203         ])
 204 ])
 205
 206 dnl #
 207 dnl # 2.6.32 API change,
 208 dnl # Check if inode_operations contains the function check_acl
 209 dnl #
 210 AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL], [
 211         AC_MSG_CHECKING([whether iops->check_acl() exists])
 212         ZFS_LINUX_TRY_COMPILE([
 213                 #include <linux/fs.h>
 214
 215                 int check_acl_fn(struct inode *inode, int mask) { return 0; }
 216
 217                 static const struct inode_operations
 218                     iops __attribute__ ((unused)) = {
 219                         .check_acl = check_acl_fn,
 220                 };
 221         ],[
 222         ],[
 223                 AC_MSG_RESULT(yes)
 224                 AC_DEFINE(HAVE_CHECK_ACL, 1, [iops->check_acl() exists])
 225         ],[
 226                 AC_MSG_RESULT(no)
 227         ])
 228 ])
 229
 230 dnl #
 231 dnl # 2.6.38 API change,
 232 dnl # The function check_acl gained a new parameter: flags
 233 dnl #
 234 AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL_WITH_FLAGS], [
 235         AC_MSG_CHECKING([whether iops->check_acl() wants flags])
 236         ZFS_LINUX_TRY_COMPILE([
 237                 #include <linux/fs.h>
 238
 239                 int check_acl_fn(struct inode *inode, int mask,
 240                     unsigned int flags) { return 0; }
 241
 242                 static const struct inode_operations
 243                     iops __attribute__ ((unused)) = {
 244                         .check_acl = check_acl_fn,
 245                 };
 246         ],[
 247         ],[
 248                 AC_MSG_RESULT(yes)
 249                 AC_DEFINE(HAVE_CHECK_ACL, 1, [iops->check_acl() exists])
 250                 AC_DEFINE(HAVE_CHECK_ACL_WITH_FLAGS, 1,
 251                     [iops->check_acl() wants flags])
 252         ],[
 253                 AC_MSG_RESULT(no)
 254         ])
 255 ])
 256
 257 dnl #
 258 dnl # 3.1 API change,
 259 dnl # Check if inode_operations contains the function get_acl
 260 dnl #
 261 AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_GET_ACL], [
 262         AC_MSG_CHECKING([whether iops->get_acl() exists])
 263         ZFS_LINUX_TRY_COMPILE([
 264                 #include <linux/fs.h>
 265
 266                 struct posix_acl *get_acl_fn(struct inode *inode, int type)
 267                     { return NULL; }
 268
 269                 static const struct inode_operations
 270                     iops __attribute__ ((unused)) = {
 271                         .get_acl = get_acl_fn,
 272                 };
 273         ],[
 274         ],[
 275                 AC_MSG_RESULT(yes)
 276                 AC_DEFINE(HAVE_GET_ACL, 1, [iops->get_acl() exists])
 277         ],[
 278                 AC_MSG_RESULT(no)
 279         ])
 280 ])
 281
 282 dnl #
 283 dnl # 3.14 API change,
 284 dnl # Check if inode_operations contains the function set_acl
 285 dnl #
 286 AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_SET_ACL], [
 287         AC_MSG_CHECKING([whether iops->set_acl() exists])
 288         ZFS_LINUX_TRY_COMPILE([
 289                 #include <linux/fs.h>
 290
 291                 int set_acl_fn(struct inode *inode, struct posix_acl *acl, int type)
 292                     { return 0; }
 293
 294                 static const struct inode_operations
 295                     iops __attribute__ ((unused)) = {
 296                         .set_acl = set_acl_fn,
 297                 };
 298         ],[
 299         ],[
 300                 AC_MSG_RESULT(yes)
 301                 AC_DEFINE(HAVE_SET_ACL, 1, [iops->set_acl() exists])
 302         ],[
 303                 AC_MSG_RESULT(no)
 304         ])
 305 ])
 306
 307 dnl #
 308 dnl # 4.7 API change,
 309 dnl # The kernel get_acl will now check cache before calling i_op->get_acl and
 310 dnl # do set_cached_acl after that, so i_op->get_acl don't need to do that
 311 dnl # anymore.
 312 dnl #
 313 AC_DEFUN([ZFS_AC_KERNEL_GET_ACL_HANDLE_CACHE], [
 314         AC_MSG_CHECKING([whether uncached_acl_sentinel() exists])
 315         ZFS_LINUX_TRY_COMPILE([
 316                 #include <linux/fs.h>
 317         ],[
 318                 void *sentinel __attribute__ ((unused)) = uncached_acl_sentinel(NULL);
 319         ],[
 320                 AC_MSG_RESULT(yes)
 321                 AC_DEFINE(HAVE_KERNEL_GET_ACL_HANDLE_CACHE, 1, [uncached_acl_sentinel() exists])
 322         ],[
 323                 AC_MSG_RESULT(no)
 324         ])
 325 ])