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>],
7 generic_file_aio_read(struct kiocb *, char __user *,
9 [LINUX_HAS_NONVECTOR_AIO],
10 [define if kernel functions like generic_file_aio_read use
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>],
20 extern rwlock_t tasklist_lock __attribute__((weak));
21 read_lock(&tasklist_lock);
23 [EXPORTED_TASKLIST_LOCK],
24 [define if tasklist_lock exported],
29 AC_DEFUN([LINUX_EXPORTS_INIT_MM], [
30 AC_CHECK_LINUX_BUILD([for exported init_mm],
31 [ac_cv_linux_exports_init_mm],
32 [extern struct mm_struct init_mm;],
33 [void *address = &init_mm; printk("%p\n", address);],
35 [define if your kernel exports init_mm],
40 AC_DEFUN([LINUX_EXPORTS_KALLSYMS_ADDRESS], [
41 AC_CHECK_LINUX_BUILD([for exported kallsyms_address_to_symbol],
42 [ac_cv_linux_exports_kallsyms_address],
43 [#include <linux/modversions.h>],
44 [#ifndef __ver_kallsyms_address_to_symbol
45 #error kallsyms_address_to_symbol not exported
47 [EXPORTED_KALLSYMS_ADDRESS],
48 [define if your linux kernel exports kallsyms address],
53 AC_DEFUN([LINUX_EXPORTS_KALLSYMS_SYMBOL], [
54 AC_CHECK_LINUX_BUILD([for exported kallsyms_symbol_to_address],
55 [ac_cv_linux_exports_kallsyms_symbol],
56 [#include <linux/modversions.h>],
57 [#ifndef __ver_kallsyms_symbol_to_address
58 #error kallsyms_symbol_to_address not exported
60 [EXPORTED_KALLSYMS_SYMBOL],
61 [define if your linux kernel exports kallsyms],
66 AC_DEFUN([LINUX_EXPORTS_SYS_CALL_TABLE], [
67 AC_CHECK_LINUX_BUILD([for exported sys_call_table],
68 [ac_cv_linux_exports_sys_call_table],
69 [#include <linux/modversions.h>],
70 [#ifndef __ver_sys_call_table
71 #error sys_call_table not exported
73 [EXPORTED_SYS_CALL_TABLE],
74 [define if your linux kernel exports sys_call_table],
79 AC_DEFUN([LINUX_EXPORTS_IA32_SYS_CALL_TABLE], [
80 AC_CHECK_LINUX_BUILD([for exported ia32_sys_call_table],
81 [ac_cv_linux_exports_ia32_sys_call_table],
82 [#include <linux/modversions.h>],
83 [#ifndef __ver_ia32_sys_call_table
84 #error ia32_sys_call_table not exported
86 [EXPORTED_IA32_SYS_CALL_TABLE],
87 [define if your linux kernel exports ia32_sys_call_table],
92 AC_DEFUN([LINUX_EXPORTS_SYS_CHDIR], [
93 AC_CHECK_LINUX_BUILD([for exported sys_chdir],
94 [ac_cv_linux_exports_sys_chdir],
95 [extern asmlinkage long sys_chdir(void) __attribute__((weak));],
96 [void *address = &sys_chdir; printk("%p\n", address);],
98 [define if your linux kernel exports sys_chdir],
103 AC_DEFUN([LINUX_EXPORTS_SYS_OPEN], [
104 AC_CHECK_LINUX_BUILD([for exported sys_open],
105 [ac_cv_linux_exports_sys_open],
106 [extern asmlinkage long sys_open(void) __attribute__((weak));],
107 [void *address = &sys_open; printk("%p\n", address);],
109 [define if your linux kernel exports sys_open],
114 AC_DEFUN([LINUX_RECALC_SIGPENDING_ARG_TYPE], [
115 AC_CHECK_LINUX_BUILD([for recalc_sigpending arg type],
116 [ac_cv_linux_func_recalc_sigpending_takes_void],
117 [#include <linux/sched.h>
118 #ifdef HAVE_LINUX_SCHED_SIGNAL_H
119 #include <linux/sched/signal.h>
121 [recalc_sigpending();],
122 [RECALC_SIGPENDING_TAKES_VOID],
123 [define if your recalc_sigpending takes void],
128 AC_DEFUN([LINUX_SCHED_STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM], [
129 AC_CHECK_LINUX_BUILD([for signal->rlim in struct task_struct],
130 [ac_cv_linux_sched_struct_task_struct_has_signal_rlim],
131 [#include <linux/sched.h>
132 #ifdef HAVE_LINUX_SCHED_SIGNAL_H
133 #include <linux/sched/signal.h>
135 [struct task_struct _tsk; printk("%d\n", _tsk.signal->rlim);],
136 [STRUCT_TASK_STRUCT_HAS_SIGNAL_RLIM],
137 [define if your struct task_struct has signal->rlim],
142 AC_DEFUN([LINUX_KERNEL_POSIX_LOCK_FILE_WAIT_ARG], [
143 AC_CHECK_LINUX_BUILD([for 3rd argument in posix_lock_file found in new kernels],
144 [ac_cv_linux_kernel_posix_lock_file_wait_arg],
145 [#include <linux/fs.h>],
146 [posix_lock_file(0,0,0);],
147 [POSIX_LOCK_FILE_WAIT_ARG],
148 [define if your kernel uses 3 arguments for posix_lock_file],
152 AC_DEFUN([LINUX_KERNEL_PAGEVEC_INIT_COLD_ARG], [
153 AC_CHECK_LINUX_BUILD([for 2nd argument in pagevec_init found in pre-4.15 kernels],
154 [ac_cv_linux_kernel_pagevec_init_cold_arg],
155 [#include <linux/pagevec.h>],
156 [pagevec_init(0,0);],
157 [PAGEVEC_INIT_COLD_ARG],
158 [define if your kernel uses 2 arguments for pagevec_init],
162 AC_DEFUN([LINUX_KERNEL_SOCK_CREATE], [
163 AC_CHECK_LINUX_BUILD([for 5th argument in sock_create found in some SELinux kernels],
164 [ac_cv_linux_kernel_sock_create_v],
165 [#include <linux/net.h>],
166 [sock_create(0,0,0,0,0);],
167 [LINUX_KERNEL_SOCK_CREATE_V],
168 [define if your linux kernel uses 5 arguments for sock_create],
173 AC_DEFUN([LINUX_INODE_SETATTR_RETURN_TYPE], [
174 AC_CHECK_LINUX_BUILD([for inode_setattr return type],
175 [ac_cv_linux_func_inode_setattr_returns_int],
176 [#include <linux/fs.h>],
177 [struct inode _inode;
180 i = inode_setattr(&_inode, &_iattr);],
181 [INODE_SETATTR_NOT_VOID],
182 [define if your setattr return return non-void],
186 AC_DEFUN([LINUX_IATTR_64BIT_TIME], [
187 AC_CHECK_LINUX_BUILD([whether struct iattr->ia_ctime takes struct timespec64 or 32-bit struct timespec],
188 [ac_cv_linux_func_iattr_ctime_takes_timespec64],
189 [#include <linux/fs.h>
190 #include <linux/timekeeping.h>],
191 [struct iattr _attrs;
192 _attrs.ia_ctime = current_kernel_time64();],
193 [IATTR_TAKES_64BIT_TIME],
194 [define if struct iattr->ia_ctime takes struct timespec64],
198 AC_DEFUN([LINUX_AOP_WRITEBACK_CONTROL], [
199 AC_CHECK_LINUX_BUILD([whether aop.writepage takes a writeback_control],
200 [ac_cv_linux_func_a_writepage_takes_writeback_control],
201 [#include <linux/fs.h>
202 #include <linux/mm.h>
203 #include <linux/writeback.h>],
204 [struct address_space_operations _aops;
206 struct writeback_control _writeback_control;
207 (void)_aops.writepage(&_page, &_writeback_control);],
208 [AOP_WRITEPAGE_TAKES_WRITEBACK_CONTROL],
209 [define if aops.writepage takes a struct writeback_control],
214 AC_DEFUN([LINUX_REFRIGERATOR], [
215 AC_CHECK_LINUX_BUILD([whether refrigerator takes PF_FREEZE],
216 [ac_cv_linux_func_refrigerator_takes_pf_freeze],
217 [#include <linux/sched.h>
218 #ifdef HAVE_LINUX_FREEZER_H
219 #include <linux/freezer.h>
221 [refrigerator(PF_FREEZE);],
222 [LINUX_REFRIGERATOR_TAKES_PF_FREEZE],
223 [define if your refrigerator takes PF_FREEZE],
228 AC_DEFUN([LINUX_IOP_I_CREATE_TAKES_NAMEIDATA], [
229 AC_CHECK_LINUX_BUILD([whether inode_operations.create takes a nameidata],
230 [ac_cv_linux_func_i_create_takes_nameidata],
231 [#include <linux/fs.h>
232 #include <linux/namei.h>],
233 [struct inode _inode;
234 struct dentry _dentry;
235 struct nameidata _nameidata;
236 (void)_inode.i_op->create(&_inode, &_dentry, 0, &_nameidata);],
238 [IOP_CREATE_TAKES_NAMEIDATA],
239 [define if your iops.create takes a nameidata argument],
244 AC_DEFUN([LINUX_IOP_I_LOOKUP_TAKES_NAMEIDATA], [
245 AC_CHECK_LINUX_BUILD([whether inode_operations.lookup takes a nameidata],
246 [ac_cv_linux_func_i_lookup_takes_nameidata],
247 [#include <linux/fs.h>
248 #include <linux/namei.h>],
249 [struct inode _inode;
250 struct dentry _dentry;
251 struct nameidata _nameidata;
252 (void)_inode.i_op->lookup(&_inode, &_dentry, &_nameidata);],
253 [IOP_LOOKUP_TAKES_NAMEIDATA],
254 [define if your iops.lookup takes a nameidata argument],
259 AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_NAMEIDATA], [
260 AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes a nameidata],
261 [ac_cv_linux_func_i_permission_takes_nameidata],
262 [#include <linux/fs.h>
263 #include <linux/namei.h>],
264 [struct inode _inode;
265 struct nameidata _nameidata;
266 (void)_inode.i_op->permission(&_inode, 0, &_nameidata);],
267 [IOP_PERMISSION_TAKES_NAMEIDATA],
268 [define if your iops.permission takes a nameidata argument],
273 AC_DEFUN([LINUX_IOP_I_PERMISSION_TAKES_FLAGS], [
274 AC_CHECK_LINUX_BUILD([whether inode_operations.permission takes flags],
275 [ac_cv_linux_func_i_permission_takes_flags],
276 [#include <linux/fs.h>],
277 [struct inode _inode = {0};
278 unsigned int flags = 0;
279 (void)_inode.i_op->permission(&_inode, 0, flags);],
280 [IOP_PERMISSION_TAKES_FLAGS],
281 [define if your iops.permission takes a flags argument],
286 AC_DEFUN([LINUX_IOP_I_PUT_LINK_TAKES_COOKIE], [
287 AC_CHECK_LINUX_BUILD([whether inode_operations.put_link takes an opaque cookie],
288 [ac_cv_linux_func_i_put_link_takes_cookie],
289 [#include <linux/fs.h>
290 #include <linux/namei.h>],
291 [struct inode _inode;
292 struct dentry _dentry;
293 struct nameidata *_nameidata;
295 (void)_inode.i_op->put_link(&_dentry, _nameidata, cookie);],
296 [IOP_PUT_LINK_TAKES_COOKIE],
297 [define if your iops.put_link takes a cookie],
302 AC_DEFUN([LINUX_DOP_D_REVALIDATE_TAKES_NAMEIDATA], [
303 AC_CHECK_LINUX_BUILD([whether dentry_operations.d_revalidate takes a nameidata],
304 [ac_cv_linux_func_d_revalidate_takes_nameidata],
305 [#include <linux/fs.h>
306 #include <linux/namei.h>
307 static int reval(struct dentry *d, struct nameidata *nd) { return 0; }
308 struct dentry_operations dops;],
309 [dops.d_revalidate = reval;],
310 [DOP_REVALIDATE_TAKES_NAMEIDATA],
311 [define if your dops.d_revalidate takes a nameidata argument],
316 AC_DEFUN([LINUX_GET_SB_HAS_STRUCT_VFSMOUNT], [
317 AC_CHECK_LINUX_BUILD([for struct vfsmount * in get_sb_nodev()],
318 [ac_cv_linux_get_sb_has_struct_vfsmount],
319 [#include <linux/fs.h>],
320 [get_sb_nodev(0,0,0,0,0);],
321 [GET_SB_HAS_STRUCT_VFSMOUNT],
322 [define if your get_sb_nodev needs a struct vfsmount argument],
327 AC_DEFUN([LINUX_STATFS_TAKES_DENTRY], [
328 AC_CHECK_LINUX_BUILD([for dentry in statfs],
329 [ac_cv_linux_statfs_takes_dentry],
330 [#include <linux/fs.h>
331 #include <linux/statfs.h>],
332 [extern int simple_statfs(struct dentry *, struct kstatfs *);],
333 [STATFS_TAKES_DENTRY],
334 [define if your statfs takes a dentry argument],
339 AC_DEFUN([LINUX_LINUX_KEYRING_SUPPORT], [
340 AC_CHECK_LINUX_BUILD([for linux kernel keyring support],
341 [ac_cv_linux_keyring_support],
342 [#include <linux/rwsem.h>
343 #ifdef HAVE_LINUX_KEY_TYPE_H
344 #include <linux/key-type.h>
346 #include <linux/key.h>
347 #include <linux/keyctl.h>],
349 request_key(NULL, NULL, NULL);
350 #if !defined(KEY_POS_VIEW) || !defined(KEY_POS_SEARCH) || !defined(KEY_POS_SETATTR)
351 #error "Your linux/key.h does not contain KEY_POS_VIEW or KEY_POS_SEARCH or KEY_POS_SETATTR"
354 #error rebuild your kernel with CONFIG_KEYS
356 [LINUX_KEYRING_SUPPORT],
357 [define if your kernel has keyring support],
362 AC_DEFUN([LINUX_KEY_ALLOC_NEEDS_STRUCT_TASK], [
363 AC_CHECK_LINUX_BUILD([if key_alloc() takes a struct task *],
364 [ac_cv_key_alloc_needs_struct_task],
365 [#include <linux/rwsem.h>
366 #include <linux/key.h> ],
367 [struct task_struct *t=NULL;
369 (void) key_alloc(NULL, NULL, k.uid, k.gid, t, 0, 0);],
370 [KEY_ALLOC_NEEDS_STRUCT_TASK],
371 [define if key_alloc takes a struct task *],
372 [-Werror -Wno-pointer-arith])
376 AC_DEFUN([LINUX_KEY_ALLOC_NEEDS_CRED], [
377 AC_CHECK_LINUX_BUILD([if key_alloc() takes credentials],
378 [ac_cv_key_alloc_needs_cred],
379 [#include <linux/rwsem.h>
380 #include <linux/key.h>],
381 [struct cred *c = NULL;
383 (void) key_alloc(NULL, NULL, k.uid, k.gid, c, 0, 0);],
384 [KEY_ALLOC_NEEDS_CRED],
385 [define if key_alloc takes credentials],
386 [-Werror -Wno-pointer-arith])
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>],
396 void f(struct work_struct *w) {}
397 struct work_struct *w;
400 [INIT_WORK_HAS_DATA],
401 [define if INIT_WORK takes a data (3rd) argument],
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 [struct ctl_table *t; register_sysctl_table (t);],
411 [REGISTER_SYSCTL_TABLE_NOFLAG],
412 [define if register_sysctl_table has no insert_at head flag],
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;
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],
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;
438 (void)_inode.i_fop->fsync(&_file, &_d, 0);],
439 [FOP_FSYNC_TAKES_DENTRY],
440 [define if your fops.fsync takes an dentry argument],
445 int (*fsync) (struct file *, loff_t start, loff_t end, int datasync);
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;
454 (void)_inode.i_fop->fsync(&_file, start, end, 0);],
455 [FOP_FSYNC_TAKES_RANGE],
456 [define if your fops.fsync takes range arguments],
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>],
467 [define if kmem_cache_t exists],
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],
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],
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
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],
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,
517 void (*)(struct kmem_cache *, void *));
520 [define for new kmem_cache init function parameters],
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],
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],
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);],
554 [define if kernel uses new export ops],
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;
565 lock = posix_test_lock(file, lock);],
566 [POSIX_TEST_LOCK_RETURNS_CONFLICT],
567 [define if posix_test_lock returns the conflicting lock],
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;
578 posix_test_lock(file, lock, lock);],
579 [POSIX_TEST_LOCK_CONFLICT_ARG],
580 [define if posix_test_lock takes a conflict argument],
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],
589 #ifdef HAVE_LINUX_KEY_TYPE_H
590 #include <linux/key-type.h>
592 #include <linux/key.h>
594 [printk("%s", key_type_keyring.name);],
595 [EXPORTED_KEY_TYPE_KEYRING],
596 [define if key_type_keyring is exported],
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>
608 [#ifdef LINUX_REFRIGERATOR_TAKES_PF_FREEZE
609 try_to_freeze(PF_FREEZE);
613 [HAVE_TRY_TO_FREEZE],
614 [define if your kernel has the try_to_freeze function],
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);],
625 [define if dcache_lock exists],
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> ],
638 [define if dentry->d_count is an int],
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 static int _d_del(const struct dentry *de) { return 0; }
649 struct dentry_operations _d_ops;],
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],
656 AC_DEFUN([LINUX_IOP_GETATTR_TAKES_PATH_STRUCT], [
657 AC_CHECK_LINUX_BUILD([whether 4.11+ inode.i_op->getattr takes a struct path argument],
658 [ac_cv_linux_iop_getattr_takes_path_struct],
659 [#include <linux/fs.h>
660 int _getattr(const struct path *path, struct kstat *stat, u32 request_mask,
661 unsigned int sync_mode) {return 0;};
662 struct inode_operations _i_ops;],
663 [_i_ops.getattr = _getattr;],
664 [IOP_GETATTR_TAKES_PATH_STRUCT],
665 [define if 4.11+ inode.i_op->getattr takes a struct path argument],
669 AC_DEFUN([LINUX_IOP_MKDIR_TAKES_UMODE_T], [
670 AC_CHECK_LINUX_BUILD([whether inode.i_op->mkdir takes a umode_t argument],
671 [ac_cv_linux_iop_mkdir_takes_umode_t],
672 [#include <linux/fs.h>
673 static int _mkdir(struct inode *i, struct dentry *d, umode_t m) { return 0; }
674 struct inode_operations _i_ops;],
675 [_i_ops.mkdir = _mkdir;],
676 [IOP_MKDIR_TAKES_UMODE_T],
677 [define if inode.i_op->mkdir takes a umode_t argument],
682 AC_DEFUN([LINUX_IOP_CREATE_TAKES_UMODE_T], [
683 AC_CHECK_LINUX_BUILD([whether inode.i_op->create takes a umode_t argument],
684 [ac_cv_linux_iop_create_takes_umode_t],
685 [#include <linux/fs.h>],
686 [struct inode_operations _i_ops;
687 int _create(struct inode *i, struct dentry *d, umode_t m, struct nameidata *n)
689 _i_ops.create = _create;],
690 [IOP_CREATE_TAKES_UMODE_T],
691 [define if inode.i_op->create takes a umode_t argument],
696 AC_DEFUN([LINUX_EXPORT_OP_ENCODE_FH_TAKES_INODES], [
697 AC_CHECK_LINUX_BUILD([whether export operation encode_fh takes inode arguments],
698 [ac_cv_linux_export_op_encode_fh__takes_inodes],
699 [#include <linux/exportfs.h>
700 static int _encode_fh(struct inode *i, __u32 *fh, int *len, struct inode *p) { return 0; }
701 struct export_operations _exp_ops;],
702 [_exp_ops.encode_fh = _encode_fh;],
703 [EXPORT_OP_ENCODE_FH_TAKES_INODES],
704 [define if encode_fh export op takes inode arguments],
709 AC_DEFUN([LINUX_KMAP_ATOMIC_TAKES_NO_KM_TYPE], [
710 AC_CHECK_LINUX_BUILD([whether kmap_atomic takes no km_type argument],
711 [ac_cv_linux_kma_atomic_takes_no_km_type],
712 [#include <linux/highmem.h>],
713 [struct page *p = NULL;
715 [KMAP_ATOMIC_TAKES_NO_KM_TYPE],
716 [define if kmap_atomic takes no km_type argument],
721 AC_DEFUN([LINUX_DENTRY_OPEN_TAKES_PATH], [
722 AC_CHECK_LINUX_BUILD([whether dentry_open takes a path argument],
723 [ac_cv_linux_dentry_open_takes_path],
724 [#include <linux/fs.h>],
726 dentry_open(&p, 0, NULL);],
727 [DENTRY_OPEN_TAKES_PATH],
728 [define if dentry_open takes a path argument],
733 AC_DEFUN([LINUX_D_ALIAS_IS_HLIST], [
734 AC_CHECK_LINUX_BUILD([whether dentry->d_alias is an hlist],
735 [ac_cv_linux_d_alias_is_hlist],
736 [#include <linux/fs.h>],
737 [struct dentry *d = NULL;
738 struct hlist_node *hn = NULL;
739 #if defined(STRUCT_DENTRY_HAS_D_U_D_ALIAS)
740 d->d_u.d_alias = *hn;
745 [define if dentry->d_alias is an hlist],
750 AC_DEFUN([LINUX_HLIST_ITERATOR_NO_NODE], [
751 AC_CHECK_LINUX_BUILD([whether hlist iterators don't need a node parameter],
752 [ac_cv_linux_hlist_takes_no_node],
753 [#include <linux/list.h>
754 #include <linux/fs.h>],
755 [struct dentry *d = NULL, *cur;
757 #if defined(STRUCT_DENTRY_HAS_D_U_D_ALIAS)
758 # define d_alias d_u.d_alias
760 hlist_for_each_entry(cur, &ip->i_dentry, d_alias) { }
762 [HLIST_ITERATOR_NO_NODE],
763 [define if hlist iterators don't need a node parameter],
768 AC_DEFUN([LINUX_IOP_I_CREATE_TAKES_BOOL], [
769 AC_CHECK_LINUX_BUILD([whether inode_operations.create takes a bool],
770 [ac_cv_linux_func_i_create_takes_bool],
771 [#include <linux/fs.h>
772 #include <linux/namei.h>],
773 [struct inode _inode = {};
774 struct dentry _dentry;
776 (void)_inode.i_op->create(&_inode, &_dentry, 0, b);],
777 [IOP_CREATE_TAKES_BOOL],
778 [define if your iops.create takes a bool argument],
783 AC_DEFUN([LINUX_DOP_D_REVALIDATE_TAKES_UNSIGNED], [
784 AC_CHECK_LINUX_BUILD([whether dentry_operations.d_revalidate takes an unsigned int],
785 [ac_cv_linux_func_d_revalidate_takes_unsigned],
786 [#include <linux/fs.h>
787 #include <linux/namei.h>
788 static int reval(struct dentry *d, unsigned int i) { return 0; }
789 struct dentry_operations _d_ops;],
790 [_d_ops.d_revalidate = reval;],
791 [DOP_REVALIDATE_TAKES_UNSIGNED],
792 [define if your dops.d_revalidate takes an unsigned int argument],
797 AC_DEFUN([LINUX_IOP_LOOKUP_TAKES_UNSIGNED], [
798 AC_CHECK_LINUX_BUILD([whether inode operation lookup takes an unsigned int],
799 [ac_cv_linux_func_lookup_takes_unsigned],
800 [#include <linux/fs.h>
801 #include <linux/namei.h>
802 static struct dentry *look(struct inode *i, struct dentry *d, unsigned int j) { return NULL; }
803 struct inode_operations _i_ops;],
804 [_i_ops.lookup = look;],
805 [IOP_LOOKUP_TAKES_UNSIGNED],
806 [define if your iops.lookup takes an unsigned int argument],
811 AC_DEFUN([LINUX_D_INVALIDATE_IS_VOID], [
812 AC_CHECK_LINUX_BUILD([whether d_invalidate returns void],
813 [ac_cv_linux_func_d_invalidate_returns_void],
814 [#include <linux/fs.h>],
816 void d_invalidate(struct dentry *);
818 [D_INVALIDATE_IS_VOID],
819 [define if your d_invalidate returns void],
823 AC_DEFUN([LINUX_KERNEL_READ_OFFSET_IS_LAST], [
824 AC_CHECK_LINUX_BUILD([whether offset is the last argument to kernel_read],
825 [ac_cv_linux_func_kernel_read_offset_is_last],
826 [#include <linux/fs.h>],
828 ssize_t kernel_read(struct file *, void *, size_t, loff_t *);
830 [KERNEL_READ_OFFSET_IS_LAST],
831 [define if your kernel_read has offset as the last argument],