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[wine/multimedia.git] / server / directory.c
blobe5e82b09830a91888fa2011b3118841f0e253a05
1 /*
2 * Server-side directory object management
4 * Copyright (C) 2005 Vitaliy Margolen
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "config.h"
23 #include "wine/port.h"
25 #include <assert.h>
26 #include <stdarg.h>
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <sys/types.h>
31 #include "ntstatus.h"
32 #define WIN32_NO_STATUS
33 #include "winternl.h"
34 #include "ddk/wdm.h"
36 #include "handle.h"
37 #include "request.h"
38 #include "process.h"
39 #include "file.h"
40 #include "unicode.h"
42 #define HASH_SIZE 7 /* default hash size */
44 struct object_type
46 struct object obj; /* object header */
49 static void object_type_dump( struct object *obj, int verbose );
50 static struct object_type *object_type_get_type( struct object *obj );
52 static const struct object_ops object_type_ops =
54 sizeof(struct object_type), /* size */
55 object_type_dump, /* dump */
56 object_type_get_type, /* get_type */
57 no_add_queue, /* add_queue */
58 NULL, /* remove_queue */
59 NULL, /* signaled */
60 NULL, /* satisfied */
61 no_signal, /* signal */
62 no_get_fd, /* get_fd */
63 no_map_access, /* map_access */
64 default_get_sd, /* get_sd */
65 default_set_sd, /* set_sd */
66 no_lookup_name, /* lookup_name */
67 no_open_file, /* open_file */
68 no_close_handle, /* close_handle */
69 no_destroy /* destroy */
73 struct directory
75 struct object obj; /* object header */
76 struct namespace *entries; /* directory's name space */
79 static void directory_dump( struct object *obj, int verbose );
80 static struct object_type *directory_get_type( struct object *obj );
81 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
82 unsigned int attr );
83 static void directory_destroy( struct object *obj );
85 static const struct object_ops directory_ops =
87 sizeof(struct directory), /* size */
88 directory_dump, /* dump */
89 directory_get_type, /* get_type */
90 no_add_queue, /* add_queue */
91 NULL, /* remove_queue */
92 NULL, /* signaled */
93 NULL, /* satisfied */
94 no_signal, /* signal */
95 no_get_fd, /* get_fd */
96 default_fd_map_access, /* map_access */
97 default_get_sd, /* get_sd */
98 default_set_sd, /* set_sd */
99 directory_lookup_name, /* lookup_name */
100 no_open_file, /* open_file */
101 no_close_handle, /* close_handle */
102 directory_destroy /* destroy */
105 static struct directory *root_directory;
106 static struct directory *dir_objtype;
109 static void object_type_dump( struct object *obj, int verbose )
111 assert( obj->ops == &object_type_ops );
113 fputs( "Object type ", stderr );
114 dump_object_name( obj );
115 fputc( '\n', stderr );
118 static struct object_type *object_type_get_type( struct object *obj )
120 static const WCHAR name[] = {'O','b','j','e','c','t','T','y','p','e'};
121 static const struct unicode_str str = { name, sizeof(name) };
122 return get_object_type( &str );
125 static void directory_dump( struct object *obj, int verbose )
127 assert( obj->ops == &directory_ops );
129 fputs( "Directory ", stderr );
130 dump_object_name( obj );
131 fputc( '\n', stderr );
134 static struct object_type *directory_get_type( struct object *obj )
136 static const WCHAR name[] = {'D','i','r','e','c','t','o','r','y'};
137 static const struct unicode_str str = { name, sizeof(name) };
138 return get_object_type( &str );
141 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
142 unsigned int attr )
144 struct directory *dir = (struct directory *)obj;
145 struct object *found;
146 struct unicode_str tmp;
147 const WCHAR *p;
149 assert( obj->ops == &directory_ops );
151 if (!(p = memchrW( name->str, '\\', name->len / sizeof(WCHAR) )))
152 /* Last element in the path name */
153 tmp.len = name->len;
154 else
155 tmp.len = (p - name->str) * sizeof(WCHAR);
157 tmp.str = name->str;
158 if ((found = find_object( dir->entries, &tmp, attr )))
160 /* Skip trailing \\ */
161 if (p)
163 p++;
164 tmp.len += sizeof(WCHAR);
166 /* Move to the next element*/
167 name->str = p;
168 name->len -= tmp.len;
169 return found;
172 if (name->str)
174 if (tmp.len == 0) /* Double backslash */
175 set_error( STATUS_OBJECT_NAME_INVALID );
176 else if (p) /* Path still has backslashes */
177 set_error( STATUS_OBJECT_PATH_NOT_FOUND );
178 else
179 clear_error();
181 return NULL;
184 static void directory_destroy( struct object *obj )
186 struct directory *dir = (struct directory *)obj;
187 assert( obj->ops == &directory_ops );
188 free( dir->entries );
191 static struct directory *create_directory( struct directory *root, const struct unicode_str *name,
192 unsigned int attr, unsigned int hash_size )
194 struct directory *dir;
196 if ((dir = create_named_object_dir( root, name, attr, &directory_ops )) &&
197 get_error() != STATUS_OBJECT_NAME_EXISTS)
199 if (!(dir->entries = create_namespace( hash_size )))
201 release_object( dir );
202 dir = NULL;
205 return dir;
208 struct directory *get_directory_obj( struct process *process, obj_handle_t handle, unsigned int access )
210 return (struct directory *)get_handle_obj( process, handle, access, &directory_ops );
213 /******************************************************************************
214 * Find an object by its name in a given root object
216 * PARAMS
217 * root [I] directory to start search from or NULL to start from \\
218 * name [I] object name to search for
219 * attr [I] OBJECT_ATTRIBUTES.Attributes
220 * name_left [O] [optional] leftover name if object is not found
222 * RETURNS
223 * NULL: If params are invalid
224 * Found: If object with exact name is found returns that object
225 * (name_left->len == 0). Object's refcount is incremented
226 * Not found: The last matched parent. (name_left->len > 0)
227 * Parent's refcount is incremented.
229 struct object *find_object_dir( struct directory *root, const struct unicode_str *name,
230 unsigned int attr, struct unicode_str *name_left )
232 struct object *obj, *parent;
233 struct unicode_str name_tmp;
235 if (name) name_tmp = *name;
236 else name_tmp.len = 0;
238 /* Arguments check:
239 * - Either rootdir or name have to be specified
240 * - If root is specified path shouldn't start with backslash */
241 if (root)
243 if (name_tmp.len && name_tmp.str[0] == '\\')
245 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
246 return NULL;
248 parent = grab_object( root );
250 else
252 if (!name_tmp.len || name_tmp.str[0] != '\\')
254 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
255 return NULL;
257 parent = grab_object( &root_directory->obj );
258 /* skip leading backslash */
259 name_tmp.str++;
260 name_tmp.len -= sizeof(WCHAR);
263 /* Special case for opening RootDirectory */
264 if (!name_tmp.len) goto done;
266 while ((obj = parent->ops->lookup_name( parent, &name_tmp, attr )))
268 /* move to the next element */
269 release_object ( parent );
270 parent = obj;
272 if (get_error())
274 release_object( parent );
275 return NULL;
278 done:
279 if (name_left) *name_left = name_tmp;
280 return parent;
283 /* create a named (if name is present) or unnamed object. */
284 void *create_named_object_dir( struct directory *root, const struct unicode_str *name,
285 unsigned int attributes, const struct object_ops *ops )
287 struct object *obj, *new_obj = NULL;
288 struct unicode_str new_name;
290 if (!name || !name->len) return alloc_object( ops );
292 if (!(obj = find_object_dir( root, name, attributes, &new_name ))) return NULL;
293 if (!new_name.len)
295 if (attributes & OBJ_OPENIF && obj->ops == ops)
296 set_error( STATUS_OBJECT_NAME_EXISTS );
297 else
299 release_object( obj );
300 obj = NULL;
301 if (attributes & OBJ_OPENIF)
302 set_error( STATUS_OBJECT_TYPE_MISMATCH );
303 else
304 set_error( STATUS_OBJECT_NAME_COLLISION );
306 return obj;
309 /* ATM we can't insert objects into anything else but directories */
310 if (obj->ops != &directory_ops)
311 set_error( STATUS_OBJECT_TYPE_MISMATCH );
312 else
314 struct directory *dir = (struct directory *)obj;
315 if ((new_obj = create_object( dir->entries, ops, &new_name, &dir->obj )))
316 clear_error();
319 release_object( obj );
320 return new_obj;
323 /* open a new handle to an existing object */
324 void *open_object_dir( struct directory *root, const struct unicode_str *name,
325 unsigned int attr, const struct object_ops *ops )
327 struct unicode_str name_left;
328 struct object *obj;
330 if ((obj = find_object_dir( root, name, attr, &name_left )))
332 if (name_left.len) /* not fully parsed */
333 set_error( STATUS_OBJECT_NAME_NOT_FOUND );
334 else if (ops && obj->ops != ops)
335 set_error( STATUS_OBJECT_TYPE_MISMATCH );
336 else
337 return obj;
339 release_object( obj );
341 return NULL;
344 /* retrieve an object type, creating it if needed */
345 struct object_type *get_object_type( const struct unicode_str *name )
347 struct object_type *type;
349 if ((type = open_object_dir( dir_objtype, name, 0, &object_type_ops )))
350 return type;
352 if ((type = create_named_object_dir( dir_objtype, name, 0, &object_type_ops )))
354 grab_object( type );
355 make_object_static( &type->obj );
356 clear_error();
358 return type;
361 /* Global initialization */
363 void init_directories(void)
365 /* Directories */
366 static const WCHAR dir_globalW[] = {'\\','?','?'};
367 static const WCHAR dir_driverW[] = {'D','r','i','v','e','r'};
368 static const WCHAR dir_deviceW[] = {'D','e','v','i','c','e'};
369 static const WCHAR dir_basenamedW[] = {'\\','B','a','s','e','N','a','m','e','d','O','b','j','e','c','t','s'};
370 static const WCHAR dir_named_pipeW[] = {'\\','D','e','v','i','c','e','\\','N','a','m','e','d','P','i','p','e'};
371 static const WCHAR dir_mailslotW[] = {'\\','D','e','v','i','c','e','\\','M','a','i','l','S','l','o','t'};
372 static const WCHAR dir_objtypeW[] = {'O','b','j','e','c','t','T','y','p','e','s',};
373 static const WCHAR dir_sessionsW[] = {'S','e','s','s','i','o','n','s'};
374 static const WCHAR dir_kernelW[] = {'K','e','r','n','e','l','O','b','j','e','c','t','s'};
375 static const struct unicode_str dir_global_str = {dir_globalW, sizeof(dir_globalW)};
376 static const struct unicode_str dir_driver_str = {dir_driverW, sizeof(dir_driverW)};
377 static const struct unicode_str dir_device_str = {dir_deviceW, sizeof(dir_deviceW)};
378 static const struct unicode_str dir_basenamed_str = {dir_basenamedW, sizeof(dir_basenamedW)};
379 static const struct unicode_str dir_named_pipe_str = {dir_named_pipeW, sizeof(dir_named_pipeW)};
380 static const struct unicode_str dir_mailslot_str = {dir_mailslotW, sizeof(dir_mailslotW)};
381 static const struct unicode_str dir_objtype_str = {dir_objtypeW, sizeof(dir_objtypeW)};
382 static const struct unicode_str dir_sessions_str = {dir_sessionsW, sizeof(dir_sessionsW)};
383 static const struct unicode_str dir_kernel_str = {dir_kernelW, sizeof(dir_kernelW)};
385 /* symlinks */
386 static const WCHAR link_dosdevW[] = {'D','o','s','D','e','v','i','c','e','s'};
387 static const WCHAR link_globalW[] = {'G','l','o','b','a','l'};
388 static const WCHAR link_localW[] = {'L','o','c','a','l'};
389 static const WCHAR link_pipeW[] = {'P','I','P','E'};
390 static const WCHAR link_mailslotW[] = {'M','A','I','L','S','L','O','T'};
391 static const WCHAR link_0W[] = {'0'};
392 static const WCHAR link_sessionW[] = {'S','e','s','s','i','o','n'};
393 static const WCHAR link_sessionsW[] = {'\\','S','e','s','s','i','o','n','s'};
394 static const struct unicode_str link_dosdev_str = {link_dosdevW, sizeof(link_dosdevW)};
395 static const struct unicode_str link_global_str = {link_globalW, sizeof(link_globalW)};
396 static const struct unicode_str link_local_str = {link_localW, sizeof(link_localW)};
397 static const struct unicode_str link_pipe_str = {link_pipeW, sizeof(link_pipeW)};
398 static const struct unicode_str link_mailslot_str = {link_mailslotW, sizeof(link_mailslotW)};
399 static const struct unicode_str link_0_str = {link_0W, sizeof(link_0W)};
400 static const struct unicode_str link_session_str = {link_sessionW, sizeof(link_sessionW)};
401 static const struct unicode_str link_sessions_str = {link_sessionsW, sizeof(link_sessionsW)};
403 /* devices */
404 static const WCHAR named_pipeW[] = {'N','a','m','e','d','P','i','p','e'};
405 static const WCHAR mailslotW[] = {'M','a','i','l','S','l','o','t'};
406 static const struct unicode_str named_pipe_str = {named_pipeW, sizeof(named_pipeW)};
407 static const struct unicode_str mailslot_str = {mailslotW, sizeof(mailslotW)};
409 /* events */
410 static const WCHAR event_low_memW[] = {'L','o','w','M','e','m','o','r','y','C','o','n','d','i','t','i','o','n'};
411 static const WCHAR event_low_pagedW[] = {'L','o','w','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
412 static const WCHAR event_low_nonpgW[] = {'L','o','w','N','o','n','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
413 static const WCHAR event_high_memW[] = {'H','i','g','h','M','e','m','o','r','y','C','o','n','d','i','t','i','o','n'};
414 static const WCHAR event_high_pagedW[] = {'H','i','g','h','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
415 static const WCHAR event_high_nonpgW[] = {'H','i','g','h','N','o','n','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
416 static const WCHAR keyed_event_crit_sectW[] = {'C','r','i','t','S','e','c','O','u','t','O','f','M','e','m','o','r','y','E','v','e','n','t'};
417 static const struct unicode_str kernel_events[] =
419 { event_low_memW, sizeof(event_low_memW) },
420 { event_low_pagedW, sizeof(event_low_pagedW) },
421 { event_low_nonpgW, sizeof(event_low_nonpgW) },
422 { event_high_memW, sizeof(event_high_memW) },
423 { event_high_pagedW, sizeof(event_high_pagedW) },
424 { event_high_nonpgW, sizeof(event_high_nonpgW) }
426 static const struct unicode_str keyed_event_crit_sect_str = {keyed_event_crit_sectW, sizeof(keyed_event_crit_sectW)};
428 struct directory *dir_driver, *dir_device, *dir_global, *dir_basenamed, *dir_sessions, *dir_kernel;
429 struct symlink *link_dosdev, *link_global1, *link_global2, *link_local, *link_pipe, *link_mailslot, *link_0, *link_session;
430 struct keyed_event *keyed_event;
431 unsigned int i;
433 root_directory = create_directory( NULL, NULL, 0, HASH_SIZE );
434 dir_driver = create_directory( root_directory, &dir_driver_str, 0, HASH_SIZE );
435 dir_device = create_directory( root_directory, &dir_device_str, 0, HASH_SIZE );
436 dir_objtype = create_directory( root_directory, &dir_objtype_str, 0, HASH_SIZE );
437 dir_sessions = create_directory( root_directory, &dir_sessions_str, 0, HASH_SIZE );
438 dir_kernel = create_directory( root_directory, &dir_kernel_str, 0, HASH_SIZE );
439 make_object_static( &root_directory->obj );
440 make_object_static( &dir_driver->obj );
441 make_object_static( &dir_objtype->obj );
443 dir_global = create_directory( NULL, &dir_global_str, 0, HASH_SIZE );
444 /* use a larger hash table for this one since it can contain a lot of objects */
445 dir_basenamed = create_directory( NULL, &dir_basenamed_str, 0, 37 );
447 /* devices */
448 create_named_pipe_device( dir_device, &named_pipe_str );
449 create_mailslot_device( dir_device, &mailslot_str );
451 /* symlinks */
452 link_dosdev = create_symlink( root_directory, &link_dosdev_str, 0, &dir_global_str );
453 link_global1 = create_symlink( dir_global, &link_global_str, 0, &dir_global_str );
454 link_global2 = create_symlink( dir_basenamed, &link_global_str, 0, &dir_basenamed_str );
455 link_local = create_symlink( dir_basenamed, &link_local_str, 0, &dir_basenamed_str );
456 link_pipe = create_symlink( dir_global, &link_pipe_str, 0, &dir_named_pipe_str );
457 link_mailslot = create_symlink( dir_global, &link_mailslot_str, 0, &dir_mailslot_str );
458 link_0 = create_symlink( dir_sessions, &link_0_str, 0, &dir_basenamed_str );
459 link_session = create_symlink( dir_basenamed, &link_session_str, 0, &link_sessions_str );
460 make_object_static( (struct object *)link_dosdev );
461 make_object_static( (struct object *)link_global1 );
462 make_object_static( (struct object *)link_global2 );
463 make_object_static( (struct object *)link_local );
464 make_object_static( (struct object *)link_pipe );
465 make_object_static( (struct object *)link_mailslot );
466 make_object_static( (struct object *)link_0 );
467 make_object_static( (struct object *)link_session );
469 /* events */
470 for (i = 0; i < sizeof(kernel_events)/sizeof(kernel_events[0]); i++)
472 struct event *event = create_event( dir_kernel, &kernel_events[i], 0, 1, 0, NULL );
473 make_object_static( (struct object *)event );
475 keyed_event = create_keyed_event( dir_kernel, &keyed_event_crit_sect_str, 0, NULL );
476 make_object_static( (struct object *)keyed_event );
478 /* the objects hold references so we can release these directories */
479 release_object( dir_global );
480 release_object( dir_device );
481 release_object( dir_basenamed );
482 release_object( dir_sessions );
483 release_object( dir_kernel );
486 /* create a directory object */
487 DECL_HANDLER(create_directory)
489 struct unicode_str name;
490 struct directory *dir, *root = NULL;
492 reply->handle = 0;
493 get_req_unicode_str( &name );
494 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
495 return;
497 if ((dir = create_directory( root, &name, req->attributes, HASH_SIZE )))
499 reply->handle = alloc_handle( current->process, dir, req->access, req->attributes );
500 release_object( dir );
503 if (root) release_object( root );
506 /* open a directory object */
507 DECL_HANDLER(open_directory)
509 struct unicode_str name;
510 struct directory *dir, *root = NULL;
512 get_req_unicode_str( &name );
513 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
514 return;
516 if ((dir = open_object_dir( root, &name, req->attributes, &directory_ops )))
518 reply->handle = alloc_handle( current->process, &dir->obj, req->access, req->attributes );
519 release_object( dir );
522 if (root) release_object( root );
525 /* get a directory entry by index */
526 DECL_HANDLER(get_directory_entry)
528 struct directory *dir = get_directory_obj( current->process, req->handle, DIRECTORY_QUERY );
529 if (dir)
531 struct object *obj = find_object_index( dir->entries, req->index );
532 if (obj)
534 data_size_t name_len, type_len = 0;
535 const WCHAR *type_name = NULL;
536 const WCHAR *name = get_object_name( obj, &name_len );
537 struct object_type *type = obj->ops->get_type( obj );
539 if (type) type_name = get_object_name( &type->obj, &type_len );
541 if (name_len + type_len <= get_reply_max_size())
543 void *ptr = set_reply_data_size( name_len + type_len );
544 if (ptr)
546 reply->name_len = name_len;
547 memcpy( ptr, name, name_len );
548 memcpy( (char *)ptr + name_len, type_name, type_len );
551 else set_error( STATUS_BUFFER_OVERFLOW );
553 if (type) release_object( type );
554 release_object( obj );
556 release_object( dir );
560 /* unlink a named object */
561 DECL_HANDLER(unlink_object)
563 struct object *obj = get_handle_obj( current->process, req->handle, 0, NULL );
565 if (obj)
567 unlink_named_object( obj );
568 release_object( obj );