server/device.c

   1 /*
   2  * Server-side device support
   3  *
   4  * Copyright (C) 2007 Alexandre Julliard
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include "config.h"
  22
  23 #include <assert.h>
  24 #include <fcntl.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <stdarg.h>
  28
  29 #include "ntstatus.h"
  30 #define WIN32_NO_STATUS
  31 #include "windef.h"
  32 #include "winternl.h"
  33 #include "ddk/wdm.h"
  34 #include "wine/rbtree.h"
  35
  36 #include "object.h"
  37 #include "file.h"
  38 #include "handle.h"
  39 #include "request.h"
  40 #include "process.h"
  41
  42 /* IRP object */
  43
  44 struct irp_call
  45 {
  46     struct object          obj;           /* object header */
  47     struct list            dev_entry;     /* entry in device queue */
  48     struct list            mgr_entry;     /* entry in manager queue */
  49     struct device_file    *file;          /* file containing this irp */
  50     struct thread         *thread;        /* thread that queued the irp */
  51     struct async          *async;         /* pending async op */
  52     irp_params_t           params;        /* irp parameters */
  53     struct iosb           *iosb;          /* I/O status block */
  54     int                    canceled;      /* the call was canceled */
  55     client_ptr_t           user_ptr;      /* client side pointer */
  56 };
  57
  58 static void irp_call_dump( struct object *obj, int verbose );
  59 static void irp_call_destroy( struct object *obj );
  60
  61 static const struct object_ops irp_call_ops =
  62 {
  63     sizeof(struct irp_call),          /* size */
  64     &no_type,                         /* type */
  65     irp_call_dump,                    /* dump */
  66     no_add_queue,                     /* add_queue */
  67     NULL,                             /* remove_queue */
  68     NULL,                             /* signaled */
  69     NULL,                             /* satisfied */
  70     no_signal,                        /* signal */
  71     no_get_fd,                        /* get_fd */
  72     default_map_access,               /* map_access */
  73     default_get_sd,                   /* get_sd */
  74     default_set_sd,                   /* set_sd */
  75     no_get_full_name,                 /* get_full_name */
  76     no_lookup_name,                   /* lookup_name */
  77     no_link_name,                     /* link_name */
  78     NULL,                             /* unlink_name */
  79     no_open_file,                     /* open_file */
  80     no_kernel_obj_list,               /* get_kernel_obj_list */
  81     no_close_handle,                  /* close_handle */
  82     irp_call_destroy                  /* destroy */
  83 };
  84
  85
  86 /* device manager (a list of devices managed by the same client process) */
  87
  88 struct device_manager
  89 {
  90     struct object          obj;            /* object header */
  91     struct list            devices;        /* list of devices */
  92     struct list            requests;       /* list of pending irps across all devices */
  93     struct irp_call       *current_call;   /* call currently executed on client side */
  94     struct wine_rb_tree    kernel_objects; /* map of objects that have client side pointer associated */
  95 };
  96
  97 static void device_manager_dump( struct object *obj, int verbose );
  98 static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry );
  99 static void device_manager_destroy( struct object *obj );
 100
 101 static const struct object_ops device_manager_ops =
 102 {
 103     sizeof(struct device_manager),    /* size */
 104     &no_type,                         /* type */
 105     device_manager_dump,              /* dump */
 106     add_queue,                        /* add_queue */
 107     remove_queue,                     /* remove_queue */
 108     device_manager_signaled,          /* signaled */
 109     no_satisfied,                     /* satisfied */
 110     no_signal,                        /* signal */
 111     no_get_fd,                        /* get_fd */
 112     default_map_access,               /* map_access */
 113     default_get_sd,                   /* get_sd */
 114     default_set_sd,                   /* set_sd */
 115     no_get_full_name,                 /* get_full_name */
 116     no_lookup_name,                   /* lookup_name */
 117     no_link_name,                     /* link_name */
 118     NULL,                             /* unlink_name */
 119     no_open_file,                     /* open_file */
 120     no_kernel_obj_list,               /* get_kernel_obj_list */
 121     no_close_handle,                  /* close_handle */
 122     device_manager_destroy            /* destroy */
 123 };
 124
 125
 126 /* device (a single device object) */
 127
 128 static const WCHAR device_name[] = {'D','e','v','i','c','e'};
 129
 130 struct type_descr device_type =
 131 {
 132     { device_name, sizeof(device_name) },   /* name */
 133     FILE_ALL_ACCESS,                        /* valid_access */
 134     {                                       /* mapping */
 135         FILE_GENERIC_READ,
 136         FILE_GENERIC_WRITE,
 137         FILE_GENERIC_EXECUTE,
 138         FILE_ALL_ACCESS
 139     },
 140 };
 141
 142 struct device
 143 {
 144     struct object          obj;           /* object header */
 145     struct device_manager *manager;       /* manager for this device (or NULL if deleted) */
 146     char                  *unix_path;     /* path to unix device if any */
 147     struct list            kernel_object; /* list of kernel object pointers */
 148     struct list            entry;         /* entry in device manager list */
 149     struct list            files;         /* list of open files */
 150 };
 151
 152 static void device_dump( struct object *obj, int verbose );
 153 static void device_destroy( struct object *obj );
 154 static struct object *device_open_file( struct object *obj, unsigned int access,
 155                                         unsigned int sharing, unsigned int options );
 156 static struct list *device_get_kernel_obj_list( struct object *obj );
 157
 158 static const struct object_ops device_ops =
 159 {
 160     sizeof(struct device),            /* size */
 161     &device_type,                     /* type */
 162     device_dump,                      /* dump */
 163     no_add_queue,                     /* add_queue */
 164     NULL,                             /* remove_queue */
 165     NULL,                             /* signaled */
 166     no_satisfied,                     /* satisfied */
 167     no_signal,                        /* signal */
 168     no_get_fd,                        /* get_fd */
 169     default_map_access,               /* map_access */
 170     default_get_sd,                   /* get_sd */
 171     default_set_sd,                   /* set_sd */
 172     default_get_full_name,            /* get_full_name */
 173     no_lookup_name,                   /* lookup_name */
 174     directory_link_name,              /* link_name */
 175     default_unlink_name,              /* unlink_name */
 176     device_open_file,                 /* open_file */
 177     device_get_kernel_obj_list,       /* get_kernel_obj_list */
 178     no_close_handle,                  /* close_handle */
 179     device_destroy                    /* destroy */
 180 };
 181
 182
 183 /* device file (an open file handle to a device) */
 184
 185 struct device_file
 186 {
 187     struct object          obj;           /* object header */
 188     struct device         *device;        /* device for this file */
 189     struct fd             *fd;            /* file descriptor for irp */
 190     struct list            kernel_object; /* list of kernel object pointers */
 191     int                    closed;        /* closed file flag */
 192     struct list            entry;         /* entry in device list */
 193     struct list            requests;      /* list of pending irp requests */
 194 };
 195
 196 static void device_file_dump( struct object *obj, int verbose );
 197 static struct fd *device_file_get_fd( struct object *obj );
 198 static WCHAR *device_file_get_full_name( struct object *obj, data_size_t *len );
 199 static struct list *device_file_get_kernel_obj_list( struct object *obj );
 200 static int device_file_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
 201 static void device_file_destroy( struct object *obj );
 202 static enum server_fd_type device_file_get_fd_type( struct fd *fd );
 203 static void device_file_read( struct fd *fd, struct async *async, file_pos_t pos );
 204 static void device_file_write( struct fd *fd, struct async *async, file_pos_t pos );
 205 static void device_file_flush( struct fd *fd, struct async *async );
 206 static void device_file_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
 207 static void device_file_cancel_async( struct fd *fd, struct async *async );
 208 static void device_file_get_volume_info( struct fd *fd, struct async *async, unsigned int info_class );
 209
 210 static const struct object_ops device_file_ops =
 211 {
 212     sizeof(struct device_file),       /* size */
 213     &file_type,                       /* type */
 214     device_file_dump,                 /* dump */
 215     add_queue,                        /* add_queue */
 216     remove_queue,                     /* remove_queue */
 217     default_fd_signaled,              /* signaled */
 218     no_satisfied,                     /* satisfied */
 219     no_signal,                        /* signal */
 220     device_file_get_fd,               /* get_fd */
 221     default_map_access,               /* map_access */
 222     default_get_sd,                   /* get_sd */
 223     default_set_sd,                   /* set_sd */
 224     device_file_get_full_name,        /* get_full_name */
 225     no_lookup_name,                   /* lookup_name */
 226     no_link_name,                     /* link_name */
 227     NULL,                             /* unlink_name */
 228     no_open_file,                     /* open_file */
 229     device_file_get_kernel_obj_list,  /* get_kernel_obj_list */
 230     device_file_close_handle,         /* close_handle */
 231     device_file_destroy               /* destroy */
 232 };
 233
 234 static const struct fd_ops device_file_fd_ops =
 235 {
 236     default_fd_get_poll_events,       /* get_poll_events */
 237     default_poll_event,               /* poll_event */
 238     device_file_get_fd_type,          /* get_fd_type */
 239     device_file_read,                 /* read */
 240     device_file_write,                /* write */
 241     device_file_flush,                /* flush */
 242     default_fd_get_file_info,         /* get_file_info */
 243     device_file_get_volume_info,      /* get_volume_info */
 244     device_file_ioctl,                /* ioctl */
 245     device_file_cancel_async,         /* cancel_async */
 246     default_fd_queue_async,           /* queue_async */
 247     default_fd_reselect_async,        /* reselect_async */
 248 };
 249
 250
 251 struct list *no_kernel_obj_list( struct object *obj )
 252 {
 253     return NULL;
 254 }
 255
 256 struct kernel_object
 257 {
 258     struct device_manager  *manager;
 259     client_ptr_t            user_ptr;
 260     struct object          *object;
 261     int                     owned;
 262     struct list             list_entry;
 263     struct wine_rb_entry    rb_entry;
 264 };
 265
 266 static int compare_kernel_object( const void *k, const struct wine_rb_entry *entry )
 267 {
 268     struct kernel_object *ptr = WINE_RB_ENTRY_VALUE( entry, struct kernel_object, rb_entry );
 269     return memcmp( k, &ptr->user_ptr, sizeof(client_ptr_t) );
 270 }
 271
 272 static struct kernel_object *kernel_object_from_obj( struct device_manager *manager, struct object *obj )
 273 {
 274     struct kernel_object *kernel_object;
 275     struct list *list;
 276
 277     if (!(list = obj->ops->get_kernel_obj_list( obj ))) return NULL;
 278     LIST_FOR_EACH_ENTRY( kernel_object, list, struct kernel_object, list_entry )
 279     {
 280         if (kernel_object->manager != manager) continue;
 281         return kernel_object;
 282     }
 283     return NULL;
 284 }
 285
 286 static client_ptr_t get_kernel_object_ptr( struct device_manager *manager, struct object *obj )
 287 {
 288     struct kernel_object *kernel_object = kernel_object_from_obj( manager, obj );
 289     return kernel_object ? kernel_object->user_ptr : 0;
 290 }
 291
 292 static struct kernel_object *set_kernel_object( struct device_manager *manager, struct object *obj, client_ptr_t user_ptr )
 293 {
 294     struct kernel_object *kernel_object;
 295     struct list *list;
 296
 297     if (!(list = obj->ops->get_kernel_obj_list( obj ))) return NULL;
 298
 299     if (!(kernel_object = malloc( sizeof(*kernel_object) ))) return NULL;
 300     kernel_object->manager  = manager;
 301     kernel_object->user_ptr = user_ptr;
 302     kernel_object->object   = obj;
 303     kernel_object->owned    = 0;
 304
 305     if (wine_rb_put( &manager->kernel_objects, &user_ptr, &kernel_object->rb_entry ))
 306     {
 307         /* kernel_object pointer already set */
 308         free( kernel_object );
 309         return NULL;
 310     }
 311
 312     list_add_head( list, &kernel_object->list_entry );
 313     return kernel_object;
 314 }
 315
 316 static struct kernel_object *kernel_object_from_ptr( struct device_manager *manager, client_ptr_t client_ptr )
 317 {
 318     struct wine_rb_entry *entry = wine_rb_get( &manager->kernel_objects, &client_ptr );
 319     return entry ? WINE_RB_ENTRY_VALUE( entry, struct kernel_object, rb_entry ) : NULL;
 320 }
 321
 322 static void grab_kernel_object( struct kernel_object *ptr )
 323 {
 324     if (!ptr->owned)
 325     {
 326         grab_object( ptr->object );
 327         ptr->owned = 1;
 328     }
 329 }
 330
 331 static void irp_call_dump( struct object *obj, int verbose )
 332 {
 333     struct irp_call *irp = (struct irp_call *)obj;
 334     fprintf( stderr, "IRP call file=%p\n", irp->file );
 335 }
 336
 337 static void irp_call_destroy( struct object *obj )
 338 {
 339     struct irp_call *irp = (struct irp_call *)obj;
 340
 341     if (irp->async)
 342     {
 343         async_terminate( irp->async, STATUS_CANCELLED );
 344         release_object( irp->async );
 345     }
 346     if (irp->iosb) release_object( irp->iosb );
 347     if (irp->file) release_object( irp->file );
 348     if (irp->thread) release_object( irp->thread );
 349 }
 350
 351 static struct irp_call *create_irp( struct device_file *file, const irp_params_t *params, struct async *async )
 352 {
 353     struct irp_call *irp;
 354
 355     if (file && !file->device->manager)  /* it has been deleted */
 356     {
 357         set_error( STATUS_FILE_DELETED );
 358         return NULL;
 359     }
 360
 361     if ((irp = alloc_object( &irp_call_ops )))
 362     {
 363         irp->file     = file ? (struct device_file *)grab_object( file ) : NULL;
 364         irp->thread   = NULL;
 365         irp->async    = NULL;
 366         irp->params   = *params;
 367         irp->iosb     = NULL;
 368         irp->canceled = 0;
 369         irp->user_ptr = 0;
 370
 371         if (async) irp->iosb = async_get_iosb( async );
 372     }
 373     return irp;
 374 }
 375
 376 static void set_irp_result( struct irp_call *irp, unsigned int status,
 377                             const void *out_data, data_size_t out_size, data_size_t result )
 378 {
 379     struct device_file *file = irp->file;
 380
 381     if (!file) return;  /* already finished */
 382
 383     /* remove it from the device queue */
 384     list_remove( &irp->dev_entry );
 385     irp->file = NULL;
 386     if (irp->async)
 387     {
 388         out_size = min( irp->iosb->out_size, out_size );
 389         async_request_complete_alloc( irp->async, status, result, out_size, out_data );
 390         release_object( irp->async );
 391         irp->async = NULL;
 392     }
 393
 394     release_object( irp );  /* no longer on the device queue */
 395     release_object( file );
 396 }
 397
 398
 399 static void device_dump( struct object *obj, int verbose )
 400 {
 401     fputs( "Device\n", stderr );
 402 }
 403
 404 static void device_destroy( struct object *obj )
 405 {
 406     struct device *device = (struct device *)obj;
 407
 408     assert( list_empty( &device->files ));
 409
 410     free( device->unix_path );
 411     if (device->manager) list_remove( &device->entry );
 412 }
 413
 414 static void add_irp_to_queue( struct device_manager *manager, struct irp_call *irp, struct thread *thread )
 415 {
 416     grab_object( irp );  /* grab reference for queued irp */
 417     irp->thread = thread ? (struct thread *)grab_object( thread ) : NULL;
 418     if (irp->file) list_add_tail( &irp->file->requests, &irp->dev_entry );
 419     list_add_tail( &manager->requests, &irp->mgr_entry );
 420     if (list_head( &manager->requests ) == &irp->mgr_entry) wake_up( &manager->obj, 0 );  /* first one */
 421 }
 422
 423 static struct object *device_open_file( struct object *obj, unsigned int access,
 424                                         unsigned int sharing, unsigned int options )
 425 {
 426     struct device *device = (struct device *)obj;
 427     struct device_file *file;
 428     struct unicode_str nt_name;
 429
 430     if (!(file = alloc_object( &device_file_ops ))) return NULL;
 431
 432     file->device = (struct device *)grab_object( device );
 433     file->closed = 0;
 434     list_init( &file->kernel_object );
 435     list_init( &file->requests );
 436     list_add_tail( &device->files, &file->entry );
 437     if (device->unix_path)
 438     {
 439         mode_t mode = 0666;
 440         access = file->obj.ops->map_access( &file->obj, access );
 441         nt_name.str = device->obj.ops->get_full_name( &device->obj, &nt_name.len );
 442         file->fd = open_fd( NULL, device->unix_path, nt_name, O_NONBLOCK, &mode, access, sharing, options );
 443         if (file->fd) set_fd_user( file->fd, &device_file_fd_ops, &file->obj );
 444     }
 445     else file->fd = alloc_pseudo_fd( &device_file_fd_ops, &file->obj, options );
 446
 447     if (!file->fd)
 448     {
 449         release_object( file );
 450         return NULL;
 451     }
 452
 453     allow_fd_caching( file->fd );
 454
 455     if (device->manager)
 456     {
 457         struct irp_call *irp;
 458         irp_params_t params;
 459
 460         memset( &params, 0, sizeof(params) );
 461         params.create.type    = IRP_CALL_CREATE;
 462         params.create.access  = access;
 463         params.create.sharing = sharing;
 464         params.create.options = options;
 465         params.create.device  = get_kernel_object_ptr( device->manager, &device->obj );
 466
 467         if ((irp = create_irp( file, &params, NULL )))
 468         {
 469             add_irp_to_queue( device->manager, irp, current );
 470             release_object( irp );
 471         }
 472     }
 473     return &file->obj;
 474 }
 475
 476 static struct list *device_get_kernel_obj_list( struct object *obj )
 477 {
 478     struct device *device = (struct device *)obj;
 479     return &device->kernel_object;
 480 }
 481
 482 static void device_file_dump( struct object *obj, int verbose )
 483 {
 484     struct device_file *file = (struct device_file *)obj;
 485
 486     fprintf( stderr, "File on device %p\n", file->device );
 487 }
 488
 489 static struct fd *device_file_get_fd( struct object *obj )
 490 {
 491     struct device_file *file = (struct device_file *)obj;
 492
 493     return (struct fd *)grab_object( file->fd );
 494 }
 495
 496 static WCHAR *device_file_get_full_name( struct object *obj, data_size_t *len )
 497 {
 498     struct device_file *file = (struct device_file *)obj;
 499     return file->device->obj.ops->get_full_name( &file->device->obj, len );
 500 }
 501
 502 static struct list *device_file_get_kernel_obj_list( struct object *obj )
 503 {
 504     struct device_file *file = (struct device_file *)obj;
 505     return &file->kernel_object;
 506 }
 507
 508 static int device_file_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
 509 {
 510     struct device_file *file = (struct device_file *)obj;
 511
 512     if (!file->closed && file->device->manager && obj->handle_count == 1)  /* last handle */
 513     {
 514         struct irp_call *irp;
 515         irp_params_t params;
 516
 517         file->closed = 1;
 518         memset( &params, 0, sizeof(params) );
 519         params.close.type = IRP_CALL_CLOSE;
 520
 521         if ((irp = create_irp( file, &params, NULL )))
 522         {
 523             add_irp_to_queue( file->device->manager, irp, current );
 524             release_object( irp );
 525         }
 526     }
 527     return 1;
 528 }
 529
 530 static void device_file_destroy( struct object *obj )
 531 {
 532     struct device_file *file = (struct device_file *)obj;
 533     struct irp_call *irp, *next;
 534
 535     LIST_FOR_EACH_ENTRY_SAFE( irp, next, &file->requests, struct irp_call, dev_entry )
 536     {
 537         list_remove( &irp->dev_entry );
 538         release_object( irp );  /* no longer on the device queue */
 539     }
 540     if (file->fd) release_object( file->fd );
 541     list_remove( &file->entry );
 542     release_object( file->device );
 543 }
 544
 545 static int fill_irp_params( struct device_manager *manager, struct irp_call *irp, irp_params_t *params )
 546 {
 547     switch (irp->params.type)
 548     {
 549     case IRP_CALL_NONE:
 550     case IRP_CALL_FREE:
 551     case IRP_CALL_CANCEL:
 552         break;
 553     case IRP_CALL_CREATE:
 554         irp->params.create.file    = alloc_handle( current->process, irp->file,
 555                                                    irp->params.create.access, 0 );
 556         if (!irp->params.create.file) return 0;
 557         break;
 558     case IRP_CALL_CLOSE:
 559         irp->params.close.file     = get_kernel_object_ptr( manager, &irp->file->obj );
 560         break;
 561     case IRP_CALL_READ:
 562         irp->params.read.file      = get_kernel_object_ptr( manager, &irp->file->obj );
 563         irp->params.read.out_size  = irp->iosb->out_size;
 564         break;
 565     case IRP_CALL_WRITE:
 566         irp->params.write.file     = get_kernel_object_ptr( manager, &irp->file->obj );
 567         break;
 568     case IRP_CALL_FLUSH:
 569         irp->params.flush.file     = get_kernel_object_ptr( manager, &irp->file->obj );
 570         break;
 571     case IRP_CALL_IOCTL:
 572         irp->params.ioctl.file     = get_kernel_object_ptr( manager, &irp->file->obj );
 573         irp->params.ioctl.out_size = irp->iosb->out_size;
 574         break;
 575     case IRP_CALL_VOLUME:
 576         irp->params.volume.file     = get_kernel_object_ptr( manager, &irp->file->obj );
 577         irp->params.volume.out_size = irp->iosb->out_size;
 578         break;
 579     }
 580
 581     *params = irp->params;
 582     return 1;
 583 }
 584
 585 static void free_irp_params( struct irp_call *irp )
 586 {
 587     switch (irp->params.type)
 588     {
 589     case IRP_CALL_CREATE:
 590         close_handle( current->process, irp->params.create.file );
 591         break;
 592     default:
 593         break;
 594     }
 595 }
 596
 597 /* queue an irp to the device */
 598 static void queue_irp( struct device_file *file, const irp_params_t *params, struct async *async )
 599 {
 600     struct irp_call *irp = create_irp( file, params, async );
 601     if (!irp) return;
 602
 603     fd_queue_async( file->fd, async, ASYNC_TYPE_WAIT );
 604     irp->async = (struct async *)grab_object( async );
 605     add_irp_to_queue( file->device->manager, irp, current );
 606     release_object( irp );
 607     async_set_unknown_status( async );
 608 }
 609
 610 static enum server_fd_type device_file_get_fd_type( struct fd *fd )
 611 {
 612     return FD_TYPE_DEVICE;
 613 }
 614
 615 static void device_file_get_volume_info( struct fd *fd, struct async *async, unsigned int info_class )
 616 {
 617     struct device_file *file = get_fd_user( fd );
 618     irp_params_t params;
 619
 620     memset( &params, 0, sizeof(params) );
 621     params.volume.type = IRP_CALL_VOLUME;
 622     params.volume.info_class = info_class;
 623     queue_irp( file, &params, async );
 624 }
 625
 626 static void device_file_read( struct fd *fd, struct async *async, file_pos_t pos )
 627 {
 628     struct device_file *file = get_fd_user( fd );
 629     irp_params_t params;
 630
 631     memset( &params, 0, sizeof(params) );
 632     params.read.type = IRP_CALL_READ;
 633     params.read.key  = 0;
 634     params.read.pos  = pos;
 635     queue_irp( file, &params, async );
 636 }
 637
 638 static void device_file_write( struct fd *fd, struct async *async, file_pos_t pos )
 639 {
 640     struct device_file *file = get_fd_user( fd );
 641     irp_params_t params;
 642
 643     memset( &params, 0, sizeof(params) );
 644     params.write.type = IRP_CALL_WRITE;
 645     params.write.key  = 0;
 646     params.write.pos  = pos;
 647     queue_irp( file, &params, async );
 648 }
 649
 650 static void device_file_flush( struct fd *fd, struct async *async )
 651 {
 652     struct device_file *file = get_fd_user( fd );
 653     irp_params_t params;
 654
 655     memset( &params, 0, sizeof(params) );
 656     params.flush.type = IRP_CALL_FLUSH;
 657     queue_irp( file, &params, async );
 658 }
 659
 660 static void device_file_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
 661 {
 662     struct device_file *file = get_fd_user( fd );
 663     irp_params_t params;
 664
 665     memset( &params, 0, sizeof(params) );
 666     params.ioctl.type = IRP_CALL_IOCTL;
 667     params.ioctl.code = code;
 668     queue_irp( file, &params, async );
 669 }
 670
 671 static void cancel_irp_call( struct irp_call *irp )
 672 {
 673     struct irp_call *cancel_irp;
 674     irp_params_t params;
 675
 676     irp->canceled = 1;
 677     if (!irp->user_ptr || !irp->file || !irp->file->device->manager) return;
 678
 679     memset( &params, 0, sizeof(params) );
 680     params.cancel.type = IRP_CALL_CANCEL;
 681     params.cancel.irp  = irp->user_ptr;
 682
 683     if ((cancel_irp = create_irp( NULL, &params, NULL )))
 684     {
 685         add_irp_to_queue( irp->file->device->manager, cancel_irp, NULL );
 686         release_object( cancel_irp );
 687     }
 688 }
 689
 690 static void device_file_cancel_async( struct fd *fd, struct async *async )
 691 {
 692     struct device_file *file = get_fd_user( fd );
 693     struct irp_call *irp;
 694
 695     LIST_FOR_EACH_ENTRY( irp, &file->requests, struct irp_call, dev_entry )
 696     {
 697         if (irp->async == async)
 698         {
 699             cancel_irp_call( irp );
 700             return;
 701         }
 702     }
 703 }
 704
 705 static struct device *create_device( struct object *root, const struct unicode_str *name,
 706                                      struct device_manager *manager )
 707 {
 708     struct device *device;
 709
 710     if ((device = create_named_object( root, &device_ops, name, 0, NULL )))
 711     {
 712         device->unix_path = NULL;
 713         device->manager = manager;
 714         grab_object( device );
 715         list_add_tail( &manager->devices, &device->entry );
 716         list_init( &device->kernel_object );
 717         list_init( &device->files );
 718     }
 719     return device;
 720 }
 721
 722 struct object *create_unix_device( struct object *root, const struct unicode_str *name,
 723                                    unsigned int attr, const struct security_descriptor *sd,
 724                                    const char *unix_path )
 725 {
 726     struct device *device;
 727
 728     if ((device = create_named_object( root, &device_ops, name, attr, sd )))
 729     {
 730         device->unix_path = strdup( unix_path );
 731         device->manager = NULL;  /* no manager, requests go straight to the Unix device */
 732         list_init( &device->kernel_object );
 733         list_init( &device->files );
 734     }
 735     return &device->obj;
 736
 737 }
 738
 739 /* terminate requests when the underlying device is deleted */
 740 static void delete_file( struct device_file *file )
 741 {
 742     struct irp_call *irp, *next;
 743
 744     /* the pending requests may be the only thing holding a reference to the file */
 745     grab_object( file );
 746
 747     /* terminate all pending requests */
 748     LIST_FOR_EACH_ENTRY_SAFE( irp, next, &file->requests, struct irp_call, dev_entry )
 749     {
 750         list_remove( &irp->mgr_entry );
 751         set_irp_result( irp, STATUS_FILE_DELETED, NULL, 0, 0 );
 752     }
 753
 754     release_object( file );
 755 }
 756
 757 static void delete_device( struct device *device )
 758 {
 759     struct device_file *file, *next;
 760
 761     if (!device->manager) return;  /* already deleted */
 762
 763     LIST_FOR_EACH_ENTRY_SAFE( file, next, &device->files, struct device_file, entry )
 764         delete_file( file );
 765
 766     unlink_named_object( &device->obj );
 767     list_remove( &device->entry );
 768     device->manager = NULL;
 769     release_object( device );
 770 }
 771
 772
 773 static void device_manager_dump( struct object *obj, int verbose )
 774 {
 775     fprintf( stderr, "Device manager\n" );
 776 }
 777
 778 static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry )
 779 {
 780     struct device_manager *manager = (struct device_manager *)obj;
 781
 782     return !list_empty( &manager->requests );
 783 }
 784
 785 static void device_manager_destroy( struct object *obj )
 786 {
 787     struct device_manager *manager = (struct device_manager *)obj;
 788     struct kernel_object *kernel_object;
 789     struct list *ptr;
 790
 791     if (manager->current_call)
 792     {
 793         release_object( manager->current_call );
 794         manager->current_call = NULL;
 795     }
 796
 797     while (manager->kernel_objects.root)
 798     {
 799         kernel_object = WINE_RB_ENTRY_VALUE( manager->kernel_objects.root, struct kernel_object, rb_entry );
 800         wine_rb_remove( &manager->kernel_objects, &kernel_object->rb_entry );
 801         list_remove( &kernel_object->list_entry );
 802         if (kernel_object->owned) release_object( kernel_object->object );
 803         free( kernel_object );
 804     }
 805
 806     while ((ptr = list_head( &manager->devices )))
 807     {
 808         struct device *device = LIST_ENTRY( ptr, struct device, entry );
 809         delete_device( device );
 810     }
 811
 812     while ((ptr = list_head( &manager->requests )))
 813     {
 814         struct irp_call *irp = LIST_ENTRY( ptr, struct irp_call, mgr_entry );
 815         list_remove( &irp->mgr_entry );
 816         assert( !irp->file && !irp->async );
 817         release_object( irp );
 818     }
 819 }
 820
 821 static struct device_manager *create_device_manager(void)
 822 {
 823     struct device_manager *manager;
 824
 825     if ((manager = alloc_object( &device_manager_ops )))
 826     {
 827         manager->current_call = NULL;
 828         list_init( &manager->devices );
 829         list_init( &manager->requests );
 830         wine_rb_init( &manager->kernel_objects, compare_kernel_object );
 831     }
 832     return manager;
 833 }
 834
 835 void free_kernel_objects( struct object *obj )
 836 {
 837     struct list *ptr, *list;
 838
 839     if (!(list = obj->ops->get_kernel_obj_list( obj ))) return;
 840
 841     while ((ptr = list_head( list )))
 842     {
 843         struct kernel_object *kernel_object = LIST_ENTRY( ptr, struct kernel_object, list_entry );
 844         struct irp_call *irp;
 845         irp_params_t params;
 846
 847         assert( !kernel_object->owned );
 848
 849         memset( &params, 0, sizeof(params) );
 850         params.free.type = IRP_CALL_FREE;
 851         params.free.obj  = kernel_object->user_ptr;
 852
 853         if ((irp = create_irp( NULL, &params, NULL )))
 854         {
 855             add_irp_to_queue( kernel_object->manager, irp, NULL );
 856             release_object( irp );
 857         }
 858
 859         list_remove( &kernel_object->list_entry );
 860         wine_rb_remove( &kernel_object->manager->kernel_objects, &kernel_object->rb_entry );
 861         free( kernel_object );
 862     }
 863 }
 864
 865
 866 /* create a device manager */
 867 DECL_HANDLER(create_device_manager)
 868 {
 869     struct device_manager *manager = create_device_manager();
 870
 871     if (manager)
 872     {
 873         reply->handle = alloc_handle( current->process, manager, req->access, req->attributes );
 874         release_object( manager );
 875     }
 876 }
 877
 878
 879 /* create a device */
 880 DECL_HANDLER(create_device)
 881 {
 882     struct device *device;
 883     struct unicode_str name = get_req_unicode_str();
 884     struct device_manager *manager;
 885     struct object *root = NULL;
 886
 887     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
 888                                                              0, &device_manager_ops )))
 889         return;
 890
 891     if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir )))
 892     {
 893         release_object( manager );
 894         return;
 895     }
 896
 897     if ((device = create_device( root, &name, manager )))
 898     {
 899         struct kernel_object *ptr = set_kernel_object( manager, &device->obj, req->user_ptr );
 900         if (ptr)
 901             grab_kernel_object( ptr );
 902         else
 903             set_error( STATUS_NO_MEMORY );
 904         release_object( device );
 905     }
 906
 907     if (root) release_object( root );
 908     release_object( manager );
 909 }
 910
 911
 912 /* delete a device */
 913 DECL_HANDLER(delete_device)
 914 {
 915     struct device_manager *manager;
 916     struct kernel_object *ref;
 917     struct device *device;
 918
 919     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
 920                                                              0, &device_manager_ops )))
 921         return;
 922
 923     if ((ref = kernel_object_from_ptr( manager, req->device )) && ref->object->ops == &device_ops)
 924     {
 925         device = (struct device *)grab_object( ref->object );
 926         delete_device( device );
 927         release_object( device );
 928     }
 929     else set_error( STATUS_INVALID_HANDLE );
 930
 931     release_object( manager );
 932 }
 933
 934
 935 /* retrieve the next pending device irp request */
 936 DECL_HANDLER(get_next_device_request)
 937 {
 938     struct irp_call *irp;
 939     struct device_manager *manager;
 940     struct list *ptr;
 941     struct iosb *iosb;
 942
 943     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
 944                                                              0, &device_manager_ops )))
 945         return;
 946
 947     /* process result of previous call */
 948     if (manager->current_call)
 949     {
 950         irp = manager->current_call;
 951         irp->user_ptr = req->user_ptr;
 952
 953         if (irp->async)
 954         {
 955             if (req->pending)
 956                 set_async_pending( irp->async );
 957             async_set_initial_status( irp->async, req->status );
 958
 959             if (req->prev)
 960             {
 961                 set_irp_result( irp, req->iosb_status, get_req_data(), get_req_data_size(), req->result );
 962             }
 963             else
 964             {
 965                 async_wake_obj( irp->async );
 966                 if (irp->canceled)
 967                 {
 968                     /* if it was canceled during dispatch, we couldn't queue cancel
 969                      * call without client pointer, so we need to do it now */
 970                     cancel_irp_call( irp );
 971                 }
 972             }
 973         }
 974         else
 975         {
 976             set_irp_result( irp, req->status, NULL, 0, 0 );
 977         }
 978
 979         if (req->prev)
 980             close_handle( current->process, req->prev );  /* avoid an extra round-trip for close */
 981
 982         free_irp_params( irp );
 983         release_object( irp );
 984         manager->current_call = NULL;
 985     }
 986
 987     clear_error();
 988
 989     if ((ptr = list_head( &manager->requests )))
 990     {
 991         struct thread *thread;
 992
 993         irp = LIST_ENTRY( ptr, struct irp_call, mgr_entry );
 994
 995         thread = irp->thread ? irp->thread : current;
 996         reply->client_thread = get_kernel_object_ptr( manager, &thread->obj );
 997         reply->client_tid    = get_thread_id( thread );
 998
 999         iosb = irp->iosb;
1000         if (iosb)
1001             reply->in_size = iosb->in_size;
1002
1003         if (iosb && iosb->in_size > get_reply_max_size())
1004             set_error( STATUS_BUFFER_OVERFLOW );
1005         else if (!irp->file || (reply->next = alloc_handle( current->process, irp, 0, 0 )))
1006         {
1007             if (fill_irp_params( manager, irp, &reply->params ))
1008             {
1009                 if (iosb)
1010                 {
1011                     set_reply_data_ptr( iosb->in_data, iosb->in_size );
1012                     iosb->in_data = NULL;
1013                     iosb->in_size = 0;
1014                 }
1015                 list_remove( &irp->mgr_entry );
1016                 list_init( &irp->mgr_entry );
1017                 /* we already own the object if it's only on manager queue */
1018                 if (irp->file) grab_object( irp );
1019                 manager->current_call = irp;
1020             }
1021             else close_handle( current->process, reply->next );
1022         }
1023     }
1024     else set_error( STATUS_PENDING );
1025
1026     release_object( manager );
1027 }
1028
1029
1030 /* store results of an async irp */
1031 DECL_HANDLER(set_irp_result)
1032 {
1033     struct irp_call *irp;
1034
1035     if ((irp = (struct irp_call *)get_handle_obj( current->process, req->handle, 0, &irp_call_ops )))
1036     {
1037         set_irp_result( irp, req->status, get_req_data(), get_req_data_size(), req->size );
1038         close_handle( current->process, req->handle );  /* avoid an extra round-trip for close */
1039         release_object( irp );
1040     }
1041 }
1042
1043
1044 /* get kernel pointer from server object */
1045 DECL_HANDLER(get_kernel_object_ptr)
1046 {
1047     struct device_manager *manager;
1048     struct object *object = NULL;
1049
1050     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
1051                                                              0, &device_manager_ops )))
1052         return;
1053
1054     if ((object = get_handle_obj( current->process, req->handle, 0, NULL )))
1055     {
1056         reply->user_ptr = get_kernel_object_ptr( manager, object );
1057         release_object( object );
1058     }
1059
1060     release_object( manager );
1061 }
1062
1063
1064 /* associate kernel pointer with server object */
1065 DECL_HANDLER(set_kernel_object_ptr)
1066 {
1067     struct device_manager *manager;
1068     struct object *object = NULL;
1069
1070     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
1071                                                              0, &device_manager_ops )))
1072         return;
1073
1074     if (!(object = get_handle_obj( current->process, req->handle, 0, NULL )))
1075     {
1076         release_object( manager );
1077         return;
1078     }
1079
1080     if (!set_kernel_object( manager, object, req->user_ptr ))
1081         set_error( STATUS_INVALID_HANDLE );
1082
1083     release_object( object );
1084     release_object( manager );
1085 }
1086
1087
1088 /* grab server object reference from kernel object pointer */
1089 DECL_HANDLER(grab_kernel_object)
1090 {
1091     struct device_manager *manager;
1092     struct kernel_object *ref;
1093
1094     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
1095                                                              0, &device_manager_ops )))
1096         return;
1097
1098     if ((ref = kernel_object_from_ptr( manager, req->user_ptr )) && !ref->owned)
1099         grab_kernel_object( ref );
1100     else
1101         set_error( STATUS_INVALID_HANDLE );
1102
1103     release_object( manager );
1104 }
1105
1106
1107 /* release server object reference from kernel object pointer */
1108 DECL_HANDLER(release_kernel_object)
1109 {
1110     struct device_manager *manager;
1111     struct kernel_object *ref;
1112
1113     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
1114                                                              0, &device_manager_ops )))
1115         return;
1116
1117     if ((ref = kernel_object_from_ptr( manager, req->user_ptr )) && ref->owned)
1118     {
1119         ref->owned = 0;
1120         release_object( ref->object );
1121     }
1122     else set_error( STATUS_INVALID_HANDLE );
1123
1124     release_object( manager );
1125 }
1126
1127
1128 /* get handle from kernel object pointer */
1129 DECL_HANDLER(get_kernel_object_handle)
1130 {
1131     struct device_manager *manager;
1132     struct kernel_object *ref;
1133
1134     if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
1135                                                              0, &device_manager_ops )))
1136         return;
1137
1138     if ((ref = kernel_object_from_ptr( manager, req->user_ptr )))
1139         reply->handle = alloc_handle( current->process, ref->object, req->access, 0 );
1140     else
1141         set_error( STATUS_INVALID_HANDLE );
1142
1143     release_object( manager );
1144 }