Linux: Fix build with CONFIG_UIDGID_STRICT_TYPE_CHECKS (user namespaces)
[openafs.git] / src / cf / linux-test4.m4
1
2 AC_DEFUN([LINUX_AIO_NONVECTOR],
3  [AC_CHECK_LINUX_BUILD([for non-vectorized aio kernel functions],
4                        [ac_cv_linux_aio_nonvector],
5                        [#include <linux/fs.h>],
6                        [extern ssize_t
7                         generic_file_aio_read(struct kiocb *, char __user *,
8                                               size_t, loff_t);],
9                        [LINUX_HAS_NONVECTOR_AIO],
10                        [define if kernel functions like generic_file_aio_read use
11                         non-vectorized i/o],
12                        [])
13  ])
14
15 AC_DEFUN([LINUX_EXPORTS_TASKLIST_LOCK], [
16   AC_CHECK_LINUX_BUILD([for exported tasklist_lock],
17                        [ac_cv_linux_exports_tasklist_lock],
18 [#include <linux/sched.h>],
19 [
20 extern rwlock_t tasklist_lock __attribute__((weak)); 
21 read_lock(&tasklist_lock);
22 ],
23                        [EXPORTED_TASKLIST_LOCK],
24                        [define if tasklist_lock exported],
25                        [])
26 ])
27
28 AC_DEFUN([LINUX_COMPLETION_H_EXISTS], [
29   AC_CHECK_LINUX_BUILD([for linux/completion.h],
30                        [ac_cv_linux_completion_h_exists],
31 [#include <linux/version.h>
32 #include <linux/completion.h>],
33 [struct completion _c;
34 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,8)
35 lose
36 #endif],
37                        [HAVE_LINUX_COMPLETION_H]
38                        [Define if your kernel has a usable linux/completion.h],
39                        [])
40 ])
41
42
43 AC_DEFUN([LINUX_EXPORTS_INIT_MM], [
44   AC_CHECK_LINUX_BUILD([for exported init_mm],
45                        [ac_cv_linux_exports_init_mm],
46                        [extern struct mm_struct init_mm;],
47                        [void *address = &init_mm; printk("%p\n", address);],
48                        [EXPORTED_INIT_MM],
49                        [define if your kernel exports init_mm],
50                        [])
51   ])
52
53
54 AC_DEFUN([LINUX_EXPORTS_KALLSYMS_ADDRESS], [
55   AC_CHECK_LINUX_BUILD([for exported kallsyms_address_to_symbol],
56                        [ac_cv_linux_exports_kallsyms_address],
57                        [#include <linux/modversions.h>],
58 [#ifndef __ver_kallsyms_address_to_symbol
59 #error kallsyms_address_to_symbol not exported
60 #endif],
61                        [EXPORTED_KALLSYMS_ADDRESS],
62                        [define if your linux kernel exports kallsyms address],
63                        [])
64 ])
65
66
67 AC_DEFUN([LINUX_EXPORTS_KALLSYMS_SYMBOL], [
68   AC_CHECK_LINUX_BUILD([for exported kallsyms_symbol_to_address],
69                        [ac_cv_linux_exports_kallsyms_symbol],
70                        [#include <linux/modversions.h>],
71 [#ifndef __ver_kallsyms_symbol_to_address
72 #error kallsyms_symbol_to_address not exported
73 #endif],
74                        [EXPORTED_KALLSYMS_SYMBOL],
75                        [define if your linux kernel exports kallsyms],
76                        [])
77 ])
78
79
80 AC_DEFUN([LINUX_EXPORTS_SYS_CALL_TABLE], [
81   AC_CHECK_LINUX_BUILD([for exported sys_call_table],
82                        [ac_cv_linux_exports_sys_call_table],
83                        [#include <linux/modversions.h>],
84 [#ifndef __ver_sys_call_table
85 #error sys_call_table not exported
86 #endif],
87                        [EXPORTED_SYS_CALL_TABLE],
88                        [define if your linux kernel exports sys_call_table],
89                        [])
90 ])
91
92
93 AC_DEFUN([LINUX_EXPORTS_IA32_SYS_CALL_TABLE], [
94   AC_CHECK_LINUX_BUILD([for exported ia32_sys_call_table],
95                        [ac_cv_linux_exports_ia32_sys_call_table],
96                        [#include <linux/modversions.h>],
97 [#ifndef __ver_ia32_sys_call_table
98 #error ia32_sys_call_table not exported
99 #endif],
100                        [EXPORTED_IA32_SYS_CALL_TABLE],
101                        [define if your linux kernel exports ia32_sys_call_table],
102                        [])
103 ])
104
105
106 AC_DEFUN([LINUX_EXPORTS_SYS_CHDIR], [
107   AC_CHECK_LINUX_BUILD([for exported sys_chdir],
108                        [ac_cv_linux_exports_sys_chdir],
109                        [extern asmlinkage long sys_chdir(void) __attribute__((weak));],
110                        [void *address = &sys_chdir; printk("%p\n", address);],
111                        [EXPORTED_SYS_CHDIR],
112                        [define if your linux kernel exports sys_chdir],
113                        [])
114 ])
115
116
117 AC_DEFUN([LINUX_EXPORTS_SYS_OPEN], [
118   AC_CHECK_LINUX_BUILD([for exported sys_open],
119                        [ac_cv_linux_exports_sys_open],
120                        [extern asmlinkage long sys_open(void) __attribute__((weak));],
121                        [void *address = &sys_open; printk("%p\n", address);],
122                        [EXPORTED_SYS_OPEN],
123                        [define if your linux kernel exports sys_open],
124                        [])
125 ])
126
127
128 AC_DEFUN([LINUX_RECALC_SIGPENDING_ARG_TYPE], [
129   AC_CHECK_LINUX_BUILD([for recalc_sigpending arg type],
130                        [ac_cv_linux_func_recalc_sigpending_takes_void],
131                        [#include <linux/sched.h>],
132                        [recalc_sigpending();],
133                        [RECALC_SIGPENDING_TAKES_VOID],
134                        [define if your recalc_sigpending takes void],
135                        [])
136 ])
137
138
139 AC_DEFUN([LINUX_SCHED_STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM], [
140   AC_CHECK_LINUX_BUILD([for signal->rlim in struct task_struct],
141                        [ac_cv_linux_sched_struct_task_struct_has_signal_rlim],
142                        [#include <linux/sched.h>],
143                        [struct task_struct _tsk; printk("%d\n", _tsk.signal->rlim);],
144                        [STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM],
145                        [define if your struct task_struct has signal->rlim],
146                        [])
147 ])
148
149
150 AC_DEFUN([LINUX_KERNEL_POSIX_LOCK_FILE_WAIT_ARG], [
151   AC_CHECK_LINUX_BUILD([for 3rd argument in posix_lock_file found in new kernels],
152                        [ac_cv_linux_kernel_posix_lock_file_wait_arg],
153                        [#include <linux/fs.h>],
154                        [posix_lock_file(0,0,0);],
155                        [POSIX_LOCK_FILE_WAIT_ARG],
156                        [define if your kernel uses 3 arguments for posix_lock_file],
157                        [])
158 ])
159
160 AC_DEFUN([LINUX_KERNEL_SOCK_CREATE], [
161   AC_CHECK_LINUX_BUILD([for 5th argument in sock_create found in some SELinux kernels],
162                        [ac_cv_linux_kernel_sock_create_v],
163                        [#include <linux/net.h>],
164                        [sock_create(0,0,0,0,0);],
165                        [LINUX_KERNEL_SOCK_CREATE_V],
166                        [define if your linux kernel uses 5 arguments for sock_create],
167                        [])
168 ])
169
170
171 AC_DEFUN([LINUX_INODE_SETATTR_RETURN_TYPE], [
172   AC_CHECK_LINUX_BUILD([for inode_setattr return type],
173                        [ac_cv_linux_func_inode_setattr_returns_int],
174                        [#include <linux/fs.h>],
175                        [struct inode _inode;
176                         struct iattr _iattr;
177                         int i;
178                         i = inode_setattr(&_inode, &_iattr);],
179                        [INODE_SETATTR_NOT_VOID],
180                        [define if your setattr return return non-void],
181                        [])
182 ])
183
184
185
186 AC_DEFUN([LINUX_AOP_WRITEBACK_CONTROL], [
187   AC_CHECK_LINUX_BUILD([whether aop.writepage takes a writeback_control],
188                        [ac_cv_linux_func_a_writepage_takes_writeback_control],
189 [#include <linux/fs.h>
190 #include <linux/mm.h>
191 #include <linux/writeback.h>],
192 [struct address_space_operations _aops;
193 struct page _page;
194 struct writeback_control _writeback_control;
195 (void)_aops.writepage(&_page, &_writeback_control);],
196                        [AOP_WRITEPAGE_TAKES_WRITEBACK_CONTROL],
197                        [define if aops.writepage takes a struct writeback_control],
198                        [])
199 ])
200
201
202 AC_DEFUN([LINUX_REFRIGERATOR], [
203   AC_CHECK_LINUX_BUILD([whether refrigerator takes PF_FREEZE],
204                        [ac_cv_linux_func_refrigerator_takes_pf_freeze],
205 [#include <linux/sched.h>
206 #ifdef HAVE_LINUX_FREEZER_H
207 #include <linux/freezer.h>
208 #endif],
209                        [refrigerator(PF_FREEZE);],
210                        [LINUX_REFRIGERATOR_TAKES_PF_FREEZE],
211                        [define if your refrigerator takes PF_FREEZE],
212                        [])
213 ])
214
215
216 AC_DEFUN([LINUX_IOP_I_CREATE_TAKES_NAMEIDATA], [
217   AC_CHECK_LINUX_BUILD([whether inode_operations.create takes a nameidata],
218                        [ac_cv_linux_func_i_create_takes_nameidata],
219 [#include <linux/fs.h>
220 #include <linux/namei.h>],
221 [struct inode _inode;
222 struct dentry _dentry;
223 struct nameidata _nameidata;
224 (void)_inode.i_op->create(&_inode, &_dentry, 0, &_nameidata);],
225
226                        [IOP_CREATE_TAKES_NAMEIDATA],
227                        [define if your iops.create takes a nameidata argument],
228                        [])
229 ])
230
231
232 AC_DEFUN([LINUX_IOP_I_LOOKUP_TAKES_NAMEIDATA], [
233   AC_CHECK_LINUX_BUILD([whether inode_operations.lookup takes a nameidata],
234                        [ac_cv_linux_func_i_lookup_takes_nameidata],
235 [#include <linux/fs.h>
236 #include <linux/namei.h>],
237 [struct inode _inode;
238 struct dentry _dentry;
239 struct nameidata _nameidata;
240 (void)_inode.i_op->lookup(&_inode, &_dentry, &_nameidata);],
241                        [IOP_LOOKUP_TAKES_NAMEIDATA],
242                        [define if your iops.lookup takes a nameidata argument],
243                        [])
244 ])
245
246
247 AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_NAMEIDATA], [
248   AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes a nameidata],
249                        [ac_cv_linux_func_i_permission_takes_nameidata],
250 [#include <linux/fs.h>
251 #include <linux/namei.h>],
252 [struct inode _inode;
253 struct nameidata _nameidata;
254 (void)_inode.i_op->permission(&_inode, 0, &_nameidata);],
255                        [IOP_PERMISSION_TAKES_NAMEIDATA],
256                        [define if your iops.permission takes a nameidata argument],
257                        [-Werror])
258 ])
259
260
261 AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_FLAGS], [
262   AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes flags],
263                         [ac_cv_linux_func_i_permission_takes_flags],
264                         [#include <linux/fs.h>],
265                         [struct inode _inode = {0};
266                         unsigned int flags = 0;
267                         (void)_inode.i_op->permission(&_inode, 0, flags);],
268                        [IOP_PERMISSION_TAKES_FLAGS],
269                        [define if your iops.permission takes a flags argument],
270                        [-Werror])
271 ])
272
273
274 AC_DEFUN([LINUX_IOP_I_PUT_LINK_TAKES_COOKIE], [
275   AC_CHECK_LINUX_BUILD([whether inode_operations.put_link takes an opaque cookie],
276                        [ac_cv_linux_func_i_put_link_takes_cookie],
277 [#include <linux/fs.h>
278 #include <linux/namei.h>],
279 [struct inode _inode;
280 struct dentry _dentry;
281 struct nameidata _nameidata;
282 void *cookie;
283 (void)_inode.i_op->put_link(&_dentry, &_nameidata, cookie);],
284                        [IOP_PUT_LINK_TAKES_COOKIE],
285                        [define if your iops.put_link takes a cookie],
286                        [])
287 ])
288
289
290 AC_DEFUN([LINUX_DOP_D_REVALIDATE_TAKES_NAMEIDATA], [
291   AC_CHECK_LINUX_BUILD([whether dentry_operations.d_revalidate takes a nameidata],
292                        [ac_cv_linux_func_d_revalidate_takes_nameidata],
293 [#include <linux/fs.h>
294 #include <linux/namei.h>],
295 [struct dentry _dentry;
296 struct nameidata _nameidata;
297 (void)_dentry.d_op->d_revalidate(&_dentry, &_nameidata);],
298                        [DOP_REVALIDATE_TAKES_NAMEIDATA],
299                        [define if your dops.d_revalidate takes a nameidata argument],
300                        [])
301 ])
302
303
304 AC_DEFUN([LINUX_GET_SB_HAS_STRUCT_VFSMOUNT], [
305   AC_CHECK_LINUX_BUILD([for struct vfsmount * in get_sb_nodev()],
306                        [ac_cv_linux_get_sb_has_struct_vfsmount],
307                        [#include <linux/fs.h>],
308                        [get_sb_nodev(0,0,0,0,0);],
309                        [GET_SB_HAS_STRUCT_VFSMOUNT],
310                        [define if your get_sb_nodev needs a struct vfsmount argument],
311                        [])
312 ])
313
314
315 AC_DEFUN([LINUX_STATFS_TAKES_DENTRY], [
316   AC_CHECK_LINUX_BUILD([for dentry in statfs],
317                        [ac_cv_linux_statfs_takes_dentry],
318 [#include <linux/fs.h>
319 #include <linux/statfs.h>],
320 [extern int simple_statfs(struct dentry *, struct kstatfs *);],
321                        [STATFS_TAKES_DENTRY],
322                        [define if your statfs takes a dentry argument],
323                        [])
324 ])
325
326
327 AC_DEFUN([LINUX_LINUX_KEYRING_SUPPORT], [
328   AC_CHECK_LINUX_BUILD([for linux kernel keyring support],
329                        [ac_cv_linux_keyring_support],
330 [#include <linux/rwsem.h>
331 #ifdef HAVE_LINUX_KEY_TYPE_H
332 #include <linux/key-type.h>
333 #endif
334 #include <linux/key.h>
335 #include <linux/keyctl.h>],
336 [#ifdef CONFIG_KEYS
337 request_key(NULL, NULL, NULL);
338 #if !defined(KEY_POS_VIEW) || !defined(KEY_POS_SEARCH) || !defined(KEY_POS_SETATTR) 
339 #error "Your linux/key.h does not contain KEY_POS_VIEW or KEY_POS_SEARCH or KEY_POS_SETATTR"
340 #endif
341 #else
342 #error rebuild your kernel with CONFIG_KEYS
343 #endif],
344                        [LINUX_KEYRING_SUPPORT],
345                        [define if your kernel has keyring support],
346                        [])
347 ])
348
349
350 AC_DEFUN([LINUX_KEY_ALLOC_NEEDS_STRUCT_TASK], [
351   AC_CHECK_LINUX_BUILD([if key_alloc() takes a struct task *],
352                         [ac_cv_key_alloc_needs_struct_task],
353                         [#include <linux/rwsem.h>
354                         #include <linux/key.h> ],
355                         [struct task_struct *t=NULL;
356                         struct key k = {};
357                         (void) key_alloc(NULL, NULL, k.uid, k.gid, t, 0, 0);],
358                         [KEY_ALLOC_NEEDS_STRUCT_TASK],
359                         [define if key_alloc takes a struct task *],
360                         [-Werror -Wno-pointer-arith])
361 ])
362
363
364 AC_DEFUN([LINUX_KEY_ALLOC_NEEDS_CRED], [
365   AC_CHECK_LINUX_BUILD([if key_alloc() takes credentials],
366                         [ac_cv_key_alloc_needs_cred],
367                         [#include <linux/rwsem.h>
368                         #include <linux/key.h>],
369                         [struct cred *c = NULL;
370                         struct key k = {};
371                         (void) key_alloc(NULL, NULL, k.uid, k.gid, c, 0, 0);],
372                         [KEY_ALLOC_NEEDS_CRED],
373                         [define if key_alloc takes credentials],
374                         [-Werror -Wno-pointer-arith])
375 ])
376
377
378 AC_DEFUN([LINUX_STRUCT_KEY_UID_IS_KUID_T], [
379   AC_CHECK_LINUX_BUILD([if struct key.uid is kuid_t],
380                         [ac_cv_struct_key_uid_is_kuid_t],
381                         [#include <linux/rwsem.h>
382                         #include <linux/key.h>],
383                         [struct key k = {};
384                         kuid_t *kuid = &k.uid;],
385                         [STRUCT_KEY_UID_IS_KUID_T],
386                         [define if struct key.uid is kuid_t])
387 ])
388
389
390 AC_DEFUN([LINUX_INIT_WORK_HAS_DATA], [
391   AC_CHECK_LINUX_BUILD([whether INIT_WORK has a _data argument],
392                        [ac_cv_linux_init_work_has_data],
393 [#include <linux/kernel.h>
394 #include <linux/workqueue.h>],
395
396 void f(struct work_struct *w) {}
397 struct work_struct *w;
398 int *i;
399 INIT_WORK(w,f,i);],
400                        [INIT_WORK_HAS_DATA],
401                        [define if INIT_WORK takes a data (3rd) argument],
402                        [])
403 ])
404
405
406 AC_DEFUN([LINUX_REGISTER_SYSCTL_TABLE_NOFLAG], [
407   AC_CHECK_LINUX_BUILD([whether register_sysctl_table has an insert_at_head argument],
408                        [ac_cv_linux_register_sysctl_table_noflag],
409                        [#include <linux/sysctl.h>],
410                        [ctl_table *t; register_sysctl_table (t);],
411                        [REGISTER_SYSCTL_TABLE_NOFLAG],
412                        [define if register_sysctl_table has no insert_at head flag],
413                        [])
414 ])
415
416
417 AC_DEFUN([LINUX_FOP_F_FLUSH_TAKES_FL_OWNER_T], [
418   AC_CHECK_LINUX_BUILD([whether file_operations.flush takes a fl_owner_t],
419                        [ac_cv_linux_func_f_flush_takes_fl_owner_t],
420                        [#include <linux/fs.h>],
421 [struct inode _inode;
422 struct file _file;
423 fl_owner_t id;
424 (void)_inode.i_fop->flush(&_file, &id);],
425                        [FOP_FLUSH_TAKES_FL_OWNER_T],
426                        [define if your fops.flush takes an fl_owner_t argument],
427                        [])
428 ])
429
430
431 AC_DEFUN([LINUX_FOP_F_FSYNC_TAKES_DENTRY], [
432   AC_CHECK_LINUX_BUILD([whether file_operations.fsync takes a dentry argument],
433                        [ac_cv_linux_func_f_fsync_takes_dentry],
434                        [#include <linux/fs.h>],
435 [struct inode _inode;
436 struct file _file;
437 struct dentry _d;
438 (void)_inode.i_fop->fsync(&_file, &_d, 0);],
439                        [FOP_FSYNC_TAKES_DENTRY],
440                        [define if your fops.fsync takes an dentry argument],
441                        [])
442 ])
443
444
445 int (*fsync) (struct file *, loff_t start, loff_t end, int datasync);
446
447 AC_DEFUN([LINUX_FOP_F_FSYNC_TAKES_RANGE], [
448   AC_CHECK_LINUX_BUILD([whether file_operations.fsync takes a range],
449                        [ac_cv_linux_func_f_fsync_takes_range],
450                        [#include <linux/fs.h>],
451 [struct inode _inode;
452 struct file _file;
453 loff_t start, end;
454 (void)_inode.i_fop->fsync(&_file, start, end, 0);],
455                        [FOP_FSYNC_TAKES_RANGE],
456                        [define if your fops.fsync takes range arguments],
457                        [])
458 ])
459
460
461 AC_DEFUN([LINUX_HAVE_KMEM_CACHE_T], [
462   AC_CHECK_LINUX_BUILD([whether kmem_cache_t exists],
463                        [ac_cv_linux_have_kmem_cache_t],
464                        [#include <linux/slab.h>],
465                        [kmem_cache_t *k;],
466                        [HAVE_KMEM_CACHE_T],
467                        [define if kmem_cache_t exists],
468                        [])
469 ])
470
471
472 AC_DEFUN([LINUX_KMEM_CACHE_CREATE_TAKES_DTOR], [
473   AC_CHECK_LINUX_BUILD([whether kmem_cache_create takes a destructor argument],
474                        [ac_cv_linux_kmem_cache_create_takes_dtor],
475                        [#include <linux/slab.h>],
476                        [kmem_cache_create(NULL, 0, 0, 0, NULL, NULL);],
477                        [KMEM_CACHE_TAKES_DTOR],
478                        [define if kmem_cache_create takes a destructor argument],
479                        [])
480 ])
481
482
483 AC_DEFUN([LINUX_KMEM_CACHE_CREATE_CTOR_TAKES_VOID],[
484   AC_CHECK_LINUX_BUILD([whether kmem_cache_create constructor takes a void pointer],
485                         [ac_cv_linux_kmem_cache_create_ctor_takes_void],
486                         [#include <linux/slab.h>],
487                         [void _ctor(void *v) { }; kmem_cache_create(NULL, 0, 0, 0, _ctor);],
488                         [KMEM_CACHE_CTOR_TAKES_VOID],
489                         [define if kmem_cache_create constructor takes a single void ptr],
490                         [-Werror])
491 ])
492
493
494 dnl This function checks not just the existence of the splice functions,
495 dnl but also that the signature matches (they gained an extra argument
496 dnl around 2.6.17)
497 AC_DEFUN([LINUX_FS_STRUCT_FOP_HAS_SPLICE], [
498   AC_CHECK_LINUX_BUILD([for splice_write and splice_read in struct file_operations],
499                        [ac_cv_linux_fs_struct_fop_has_splice],
500                        [#include <linux/fs.h>],
501                        [struct file_operations _fop;
502                         _fop.splice_write(NULL, NULL, NULL, 0, 0);
503                         _fop.splice_read(NULL, NULL, NULL, 0, 0);],
504                        [STRUCT_FILE_OPERATIONS_HAS_SPLICE],
505                        [define if struct file_operations has splice functions],
506                        [])
507 ])
508
509
510 AC_DEFUN([LINUX_KMEM_CACHE_INIT], [
511   AC_CHECK_LINUX_BUILD([for new kmem_cache init function parameters],
512                        [ac_cv_linux_kmem_cache_init],
513                        [#include <linux/slab.h>],
514                        [extern struct kmem_cache *
515                         kmem_cache_create(const char *, size_t, size_t,
516                                           unsigned long,
517                                           void (*)(struct kmem_cache *, void *));
518                         return;],
519                        [KMEM_CACHE_INIT],
520                        [define for new kmem_cache init function parameters],
521                        [])
522 ])
523
524
525 AC_DEFUN([LINUX_EXPORTS_PROC_ROOT_FS], [
526   AC_CHECK_LINUX_BUILD([if proc_root_fs is defined and exported],
527                        [ac_cv_linux_exports_proc_root_fs],
528                        [#include <linux/proc_fs.h>],
529                        [struct proc_dir_entry *p = proc_root_fs;],
530                        [EXPORTED_PROC_ROOT_FS],
531                        [define if proc_root_fs is exported],
532                        [])
533 ])
534
535
536 AC_DEFUN([LINUX_D_PATH_TAKES_STRUCT_PATH], [
537   AC_CHECK_LINUX_BUILD([if d_path() takes a struct path argument],
538                        [ac_cv_linux_d_path_takes_struct_path],
539                        [#include <linux/fs.h>],
540                        [struct path *p; d_path(p, NULL, 0);],
541                        [D_PATH_TAKES_STRUCT_PATH],
542                        [define if d_path() takes a struct path argument],
543                        [])
544 ])
545
546
547 AC_DEFUN([LINUX_NEW_EXPORT_OPS], [
548   AC_CHECK_LINUX_BUILD([if kernel uses new export ops],
549                        [ac_cv_linux_new_export_ops],
550                        [#include <linux/exportfs.h>],
551                        [struct export_operations _eops;
552                         _eops.fh_to_parent(NULL, NULL, 0, 0);],
553                        [NEW_EXPORT_OPS],
554                        [define if kernel uses new export ops],
555                        [])
556 ])
557
558
559 AC_DEFUN([LINUX_POSIX_TEST_LOCK_RETURNS_CONFLICT], [
560   AC_CHECK_LINUX_BUILD([if posix_test_lock returns a struct file_lock],
561                        [ac_cv_linux_posix_test_lock_returns_conflict],
562                        [#include <linux/fs.h>],
563                        [struct file_lock *lock;
564                         struct file * file;
565                         lock = posix_test_lock(file, lock);],
566                        [POSIX_TEST_LOCK_RETURNS_CONFLICT],
567                        [define if posix_test_lock returns the conflicting lock],
568                        [])
569 ])
570
571
572 AC_DEFUN([LINUX_POSIX_TEST_LOCK_CONFLICT_ARG], [
573   AC_CHECK_LINUX_BUILD([if posix_test_lock takes a conflict argument],
574                        [ac_cv_linux_posix_test_lock_conflict_arg],
575                        [#include <linux/fs.h>],
576                        [struct file_lock *lock;
577                         struct file *file;
578                         posix_test_lock(file, lock, lock);],
579                        [POSIX_TEST_LOCK_CONFLICT_ARG],
580                        [define if posix_test_lock takes a conflict argument],
581                        [])
582 ])
583
584
585 AC_DEFUN([LINUX_EXPORTS_KEY_TYPE_KEYRING], [
586   AC_CHECK_LINUX_BUILD([for exported key_type_keyring],
587                        [ac_cv_linux_exports_key_type_keyring],
588 [
589 #ifdef HAVE_LINUX_KEY_TYPE_H
590 #include <linux/key-type.h>
591 #endif
592 #include <linux/key.h>
593 ],
594                        [printk("%s", key_type_keyring.name);],
595                        [EXPORTED_KEY_TYPE_KEYRING],
596                        [define if key_type_keyring is exported],
597                        [])
598 ])
599
600
601 AC_DEFUN([LINUX_HAVE_TRY_TO_FREEZE], [
602   AC_CHECK_LINUX_BUILD([for try_to_freeze],
603                        [ac_cv_linux_have_try_to_freeze],
604 [#include <linux/sched.h>
605 #ifdef HAVE_LINUX_FREEZER_H
606 #include <linux/freezer.h>
607 #endif],
608 [#ifdef LINUX_REFRIGERATOR_TAKES_PF_FREEZE
609    try_to_freeze(PF_FREEZE);
610 #else
611    try_to_freeze();
612 #endif],
613                        [HAVE_TRY_TO_FREEZE],
614                        [define if your kernel has the try_to_freeze function],
615                        [])
616 ])
617
618
619 AC_DEFUN([LINUX_HAVE_DCACHE_LOCK], [
620   AC_CHECK_LINUX_BUILD([for dcache_lock],
621                         [ac_cv_linux_have_dcache_lock],
622                         [#include <linux/fs.h> ],
623                         [printk("%p", &dcache_lock);],
624                         [HAVE_DCACHE_LOCK],
625                         [define if dcache_lock exists],
626                         [])
627 ])
628
629
630 AC_DEFUN([LINUX_D_COUNT_IS_INT], [
631   AC_CHECK_LINUX_BUILD([if dentry->d_count is an int],
632                         [ac_cv_linux_d_count_int],
633                         [#include <linux/fs.h> ],
634                         [struct dentry _d;
635                         dget(&_d);
636                         _d.d_count = 1;],
637                         [D_COUNT_INT],
638                         [define if dentry->d_count is an int],
639                         [-Werror])
640 ])
641
642
643 AC_DEFUN([LINUX_DOP_D_DELETE_TAKES_CONST], [
644   AC_CHECK_LINUX_BUILD([whether dentry.d_op->d_delete takes a const argument],
645                         [ac_cv_linux_dop_d_delete_takes_const],
646                         [#include <linux/fs.h>
647                         #include <linux/dcache.h>],
648                         [struct dentry_operations _d_ops;
649                         int _d_del(const struct dentry *de) {return 0;};
650                         _d_ops.d_delete = _d_del;],
651                         [DOP_D_DELETE_TAKES_CONST],
652                         [define if dentry.d_op->d_delete takes a const argument],
653                         [-Werror])
654 ])
655
656
657 AC_DEFUN([LINUX_IOP_MKDIR_TAKES_UMODE_T], [
658   AC_CHECK_LINUX_BUILD([whether inode.i_op->mkdir takes a umode_t argument],
659                         [ac_cv_linux_iop_mkdir_takes_umode_t],
660                         [#include <linux/fs.h>],
661                         [struct inode_operations _i_ops;
662                         int _mkdir(struct inode *i, struct dentry *d, umode_t m) {return 0;};
663                         _i_ops.mkdir = _mkdir;],
664                         [IOP_MKDIR_TAKES_UMODE_T],
665                         [define if inode.i_op->mkdir takes a umode_t argument],
666                         [-Werror])
667 ])
668
669
670 AC_DEFUN([LINUX_IOP_CREATE_TAKES_UMODE_T], [
671   AC_CHECK_LINUX_BUILD([whether inode.i_op->create takes a umode_t argument],
672                         [ac_cv_linux_iop_create_takes_umode_t],
673                         [#include <linux/fs.h>],
674                         [struct inode_operations _i_ops;
675                         int _create(struct inode *i, struct dentry *d, umode_t m, struct nameidata *n)
676                                 {return 0;};
677                         _i_ops.create = _create;],
678                         [IOP_CREATE_TAKES_UMODE_T],
679                         [define if inode.i_op->create takes a umode_t argument],
680                         [-Werror])
681 ])
682
683
684 AC_DEFUN([LINUX_EXPORT_OP_ENCODE_FH_TAKES_INODES], [
685   AC_CHECK_LINUX_BUILD([whether export operation encode_fh takes inode arguments],
686                         [ac_cv_linux_export_op_encode_fh__takes_inodes],
687                         [#include <linux/exportfs.h>],
688                         [struct export_operations _exp_ops;
689                         int _encode_fh(struct inode *i, __u32 *fh, int *len, struct inode *p)
690                                 {return 0;};
691                         _exp_ops.encode_fh = _encode_fh;],
692                         [EXPORT_OP_ENCODE_FH_TAKES_INODES],
693                         [define if encode_fh export op takes inode arguments],
694                         [-Werror])
695 ])
696
697
698 AC_DEFUN([LINUX_KMAP_ATOMIC_TAKES_NO_KM_TYPE], [
699   AC_CHECK_LINUX_BUILD([whether kmap_atomic takes no km_type argument],
700                         [ac_cv_linux_kma_atomic_takes_no_km_type],
701                         [#include <linux/highmem.h>],
702                         [struct page *p = NULL;
703                         kmap_atomic(p);],
704                         [KMAP_ATOMIC_TAKES_NO_KM_TYPE],
705                         [define if kmap_atomic takes no km_type argument],
706                         [-Werror])
707 ])
708
709
710 AC_DEFUN([LINUX_DENTRY_OPEN_TAKES_PATH], [
711   AC_CHECK_LINUX_BUILD([whether dentry_open takes a path argument],
712                         [ac_cv_linux_dentry_open_takes_path],
713                         [#include <linux/fs.h>],
714                         [struct path p;
715                         dentry_open(&p, 0, NULL);],
716                         [DENTRY_OPEN_TAKES_PATH],
717                         [define if dentry_open takes a path argument],
718                         [-Werror])
719 ])
720
721
722 AC_DEFUN([LINUX_D_ALIAS_IS_HLIST], [
723   AC_CHECK_LINUX_BUILD([whether dentry->d_alias is an hlist],
724                         [ac_cv_linux_d_alias_is_hlist],
725                         [#include <linux/fs.h>],
726                         [struct dentry *d = NULL;
727                         struct hlist_node *hn = NULL;
728                         d->d_alias = *hn;],
729                         [D_ALIAS_IS_HLIST],
730                         [define if dentry->d_alias is an hlist],
731                         [])
732 ])
733
734
735 AC_DEFUN([LINUX_HLIST_ITERATOR_NO_NODE], [
736   AC_CHECK_LINUX_BUILD([whether hlist iterators don't need a node parameter],
737                         [ac_cv_linux_hlist_takes_no_node],
738                         [#include <linux/list.h>
739                         #include <linux/fs.h>],
740                         [struct dentry *d = NULL, *cur;
741                         struct inode *ip;
742                         hlist_for_each_entry(cur, &ip->i_dentry, d_alias) { }
743                         ],
744                         [HLIST_ITERATOR_NO_NODE],
745                         [define if hlist iterators don't need a node parameter],
746                         [])
747 ])
748
749
750 AC_DEFUN([LINUX_IOP_I_CREATE_TAKES_BOOL], [
751   AC_CHECK_LINUX_BUILD([whether inode_operations.create takes a bool],
752                         [ac_cv_linux_func_i_create_takes_bool],
753                         [#include <linux/fs.h>
754                         #include <linux/namei.h>],
755                         [struct inode _inode = {};
756                         struct dentry _dentry;
757                         bool b = true;
758                         (void)_inode.i_op->create(&_inode, &_dentry, 0, b);],
759                        [IOP_CREATE_TAKES_BOOL],
760                        [define if your iops.create takes a bool argument],
761                        [-Werror])
762 ])
763
764
765 AC_DEFUN([LINUX_DOP_D_REVALIDATE_TAKES_UNSIGNED], [
766   AC_CHECK_LINUX_BUILD([whether dentry_operations.d_revalidate takes an unsigned int],
767                         [ac_cv_linux_func_d_revalidate_takes_unsigned],
768                         [#include <linux/fs.h>
769                         #include <linux/namei.h>],
770                         [struct dentry_operations dops;
771                         int reval(struct dentry *d, unsigned int i) { return 0; };
772                         dops.d_revalidate = reval;],
773                        [DOP_REVALIDATE_TAKES_UNSIGNED],
774                        [define if your dops.d_revalidate takes an unsigned int argument],
775                        [-Werror])
776 ])
777
778
779 AC_DEFUN([LINUX_IOP_LOOKUP_TAKES_UNSIGNED], [
780   AC_CHECK_LINUX_BUILD([whether inode operation lookup takes an unsigned int],
781                         [ac_cv_linux_func_lookup_takes_unsigned],
782                         [#include <linux/fs.h>
783                         #include <linux/namei.h>],
784                         [struct inode_operations iops;
785                         struct dentry *look(struct inode *i, struct dentry *d, unsigned int j) { return NULL; };
786                         iops.lookup = look;],
787                        [IOP_LOOKUP_TAKES_UNSIGNED],
788                        [define if your iops.lookup takes an unsigned int argument],
789                        [-Werror])
790 ])