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Sweden-Number/server/device.c

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/*
* Server-side device support
*
* Copyright (C) 2007 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "ddk/wdm.h"
#include "object.h"
#include "file.h"
#include "handle.h"
#include "request.h"
#include "process.h"
/* IRP object */
struct irp_call
{
struct object obj; /* object header */
struct list dev_entry; /* entry in device queue */
struct list mgr_entry; /* entry in manager queue */
struct device_file *file; /* file containing this irp */
struct thread *thread; /* thread that queued the irp */
client_ptr_t user_arg; /* user arg used to identify the request */
struct async *async; /* pending async op */
unsigned int status; /* resulting status (or STATUS_PENDING) */
irp_params_t params; /* irp parameters */
data_size_t result; /* size of result (input or output depending on the type) */
data_size_t in_size; /* size of input data */
void *in_data; /* input data */
data_size_t out_size; /* size of output data */
void *out_data; /* output data */
};
static void irp_call_dump( struct object *obj, int verbose );
static int irp_call_signaled( struct object *obj, struct wait_queue_entry *entry );
static void irp_call_destroy( struct object *obj );
static const struct object_ops irp_call_ops =
{
sizeof(struct irp_call), /* size */
irp_call_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
irp_call_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
no_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
irp_call_destroy /* destroy */
};
/* device manager (a list of devices managed by the same client process) */
struct device_manager
{
struct object obj; /* object header */
struct list devices; /* list of devices */
struct list requests; /* list of pending irps across all devices */
};
static void device_manager_dump( struct object *obj, int verbose );
static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry );
static void device_manager_destroy( struct object *obj );
static const struct object_ops device_manager_ops =
{
sizeof(struct device_manager), /* size */
device_manager_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
device_manager_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
no_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
device_manager_destroy /* destroy */
};
/* device (a single device object) */
struct device
{
struct object obj; /* object header */
struct device_manager *manager; /* manager for this device (or NULL if deleted) */
char *unix_path; /* path to unix device if any */
client_ptr_t user_ptr; /* opaque ptr for client side */
struct list entry; /* entry in device manager list */
struct list files; /* list of open files */
};
static void device_dump( struct object *obj, int verbose );
static struct object_type *device_get_type( struct object *obj );
static void device_destroy( struct object *obj );
static struct object *device_open_file( struct object *obj, unsigned int access,
unsigned int sharing, unsigned int options );
static const struct object_ops device_ops =
{
sizeof(struct device), /* size */
device_dump, /* dump */
device_get_type, /* get_type */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
device_open_file, /* open_file */
no_close_handle, /* close_handle */
device_destroy /* destroy */
};
/* device file (an open file handle to a device) */
struct device_file
{
struct object obj; /* object header */
struct device *device; /* device for this file */
struct fd *fd; /* file descriptor for irp */
client_ptr_t user_ptr; /* opaque ptr for client side */
struct list entry; /* entry in device list */
struct list requests; /* list of pending irp requests */
};
static void device_file_dump( struct object *obj, int verbose );
static struct fd *device_file_get_fd( struct object *obj );
static int device_file_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
static void device_file_destroy( struct object *obj );
static enum server_fd_type device_file_get_fd_type( struct fd *fd );
static obj_handle_t device_file_read( struct fd *fd, const async_data_t *async_data, int blocking,
file_pos_t pos );
static obj_handle_t device_file_write( struct fd *fd, const async_data_t *async_data, int blocking,
file_pos_t pos, data_size_t *written );
static obj_handle_t device_file_flush( struct fd *fd, const async_data_t *async_data, int blocking );
static obj_handle_t device_file_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
int blocking );
static const struct object_ops device_file_ops =
{
sizeof(struct device_file), /* size */
device_file_dump, /* dump */
no_get_type, /* get_type */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
default_fd_signaled, /* signaled */
no_satisfied, /* satisfied */
no_signal, /* signal */
device_file_get_fd, /* get_fd */
default_fd_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
device_file_close_handle, /* close_handle */
device_file_destroy /* destroy */
};
static const struct fd_ops device_file_fd_ops =
{
default_fd_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
device_file_get_fd_type, /* get_fd_type */
device_file_read, /* read */
device_file_write, /* write */
device_file_flush, /* flush */
device_file_ioctl, /* ioctl */
default_fd_queue_async, /* queue_async */
default_fd_reselect_async, /* reselect_async */
default_fd_cancel_async /* cancel_async */
};
static void irp_call_dump( struct object *obj, int verbose )
{
struct irp_call *irp = (struct irp_call *)obj;
fprintf( stderr, "IRP call file=%p\n", irp->file );
}
static int irp_call_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct irp_call *irp = (struct irp_call *)obj;
return !irp->file; /* file is cleared once the irp has completed */
}
static void irp_call_destroy( struct object *obj )
{
struct irp_call *irp = (struct irp_call *)obj;
free( irp->in_data );
free( irp->out_data );
if (irp->async)
{
async_terminate( irp->async, STATUS_CANCELLED );
release_object( irp->async );
}
if (irp->file) release_object( irp->file );
if (irp->thread) release_object( irp->thread );
}
static struct irp_call *create_irp( struct device_file *file, const irp_params_t *params,
const void *in_data, data_size_t in_size, data_size_t out_size )
{
struct irp_call *irp;
if (!file->device->manager) /* it has been deleted */
{
set_error( STATUS_FILE_DELETED );
return NULL;
}
if ((irp = alloc_object( &irp_call_ops )))
{
irp->file = (struct device_file *)grab_object( file );
irp->thread = NULL;
irp->async = NULL;
irp->params = *params;
irp->status = STATUS_PENDING;
irp->result = 0;
irp->in_size = in_size;
irp->in_data = NULL;
irp->out_size = out_size;
irp->out_data = NULL;
if (irp->in_size && !(irp->in_data = memdup( in_data, in_size )))
{
release_object( irp );
irp = NULL;
}
}
return irp;
}
static void set_irp_result( struct irp_call *irp, unsigned int status,
const void *out_data, data_size_t out_size, data_size_t result )
{
struct device_file *file = irp->file;
if (!file) return; /* already finished */
/* FIXME: handle the STATUS_PENDING case */
irp->status = status;
irp->result = result;
irp->out_size = min( irp->out_size, out_size );
if (irp->out_size && !(irp->out_data = memdup( out_data, irp->out_size )))
irp->out_size = 0;
irp->file = NULL;
if (irp->async)
{
if (result) status = STATUS_ALERTED;
async_terminate( irp->async, status );
release_object( irp->async );
irp->async = NULL;
}
wake_up( &irp->obj, 0 );
if (status != STATUS_ALERTED)
{
/* remove it from the device queue */
/* (for STATUS_ALERTED this will be done in get_irp_result) */
list_remove( &irp->dev_entry );
release_object( irp ); /* no longer on the device queue */
}
release_object( file );
}
static void device_dump( struct object *obj, int verbose )
{
fputs( "Device\n", stderr );
}
static struct object_type *device_get_type( struct object *obj )
{
static const WCHAR name[] = {'D','e','v','i','c','e'};
static const struct unicode_str str = { name, sizeof(name) };
return get_object_type( &str );
}
static void device_destroy( struct object *obj )
{
struct device *device = (struct device *)obj;
assert( list_empty( &device->files ));
free( device->unix_path );
if (device->manager) list_remove( &device->entry );
}
static void add_irp_to_queue( struct device_file *file, struct irp_call *irp, struct thread *thread )
{
struct device_manager *manager = file->device->manager;
assert( manager );
grab_object( irp ); /* grab reference for queued irp */
irp->thread = thread ? (struct thread *)grab_object( thread ) : NULL;
list_add_tail( &file->requests, &irp->dev_entry );
list_add_tail( &manager->requests, &irp->mgr_entry );
if (list_head( &manager->requests ) == &irp->mgr_entry) wake_up( &manager->obj, 0 ); /* first one */
}
static struct object *device_open_file( struct object *obj, unsigned int access,
unsigned int sharing, unsigned int options )
{
struct device *device = (struct device *)obj;
struct device_file *file;
if (!(file = alloc_object( &device_file_ops ))) return NULL;
file->device = (struct device *)grab_object( device );
file->user_ptr = 0;
list_init( &file->requests );
list_add_tail( &device->files, &file->entry );
if (device->unix_path)
{
mode_t mode = 0666;
access = file->obj.ops->map_access( &file->obj, access );
file->fd = open_fd( NULL, device->unix_path, O_NONBLOCK | O_LARGEFILE,
&mode, access, sharing, options );
if (file->fd) set_fd_user( file->fd, &device_file_fd_ops, &file->obj );
}
else file->fd = alloc_pseudo_fd( &device_file_fd_ops, &file->obj, 0 );
if (!file->fd)
{
release_object( file );
return NULL;
}
if (device->manager)
{
struct irp_call *irp;
irp_params_t params;
memset( &params, 0, sizeof(params) );
params.create.major = IRP_MJ_CREATE;
params.create.access = access;
params.create.sharing = sharing;
params.create.options = options;
params.create.device = file->device->user_ptr;
if ((irp = create_irp( file, &params, NULL, 0, 0 )))
{
add_irp_to_queue( file, irp, NULL );
release_object( irp );
}
}
return &file->obj;
}
static void device_file_dump( struct object *obj, int verbose )
{
struct device_file *file = (struct device_file *)obj;
fprintf( stderr, "File on device %p\n", file->device );
}
static struct fd *device_file_get_fd( struct object *obj )
{
struct device_file *file = (struct device_file *)obj;
return (struct fd *)grab_object( file->fd );
}
static int device_file_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
{
struct device_file *file = (struct device_file *)obj;
if (file->device->manager && obj->handle_count == 1) /* last handle */
{
struct irp_call *irp;
irp_params_t params;
memset( &params, 0, sizeof(params) );
params.close.major = IRP_MJ_CLOSE;
params.close.file = file->user_ptr;
if ((irp = create_irp( file, &params, NULL, 0, 0 )))
{
add_irp_to_queue( file, irp, NULL );
release_object( irp );
}
}
return 1;
}
static void device_file_destroy( struct object *obj )
{
struct device_file *file = (struct device_file *)obj;
struct irp_call *irp, *next;
LIST_FOR_EACH_ENTRY_SAFE( irp, next, &file->requests, struct irp_call, dev_entry )
{
list_remove( &irp->dev_entry );
release_object( irp ); /* no longer on the device queue */
}
if (file->fd) release_object( file->fd );
list_remove( &file->entry );
release_object( file->device );
}
static struct irp_call *find_irp_call( struct device_file *file, struct thread *thread,
client_ptr_t user_arg )
{
struct irp_call *irp;
LIST_FOR_EACH_ENTRY( irp, &file->requests, struct irp_call, dev_entry )
if (irp->thread == thread && irp->user_arg == user_arg) return irp;
set_error( STATUS_INVALID_PARAMETER );
return NULL;
}
static void set_file_user_ptr( struct device_file *file, client_ptr_t ptr )
{
struct irp_call *irp;
if (file->user_ptr == ptr) return; /* nothing to do */
file->user_ptr = ptr;
/* update already queued irps */
LIST_FOR_EACH_ENTRY( irp, &file->requests, struct irp_call, dev_entry )
{
switch (irp->params.major)
{
case IRP_MJ_CLOSE: irp->params.close.file = ptr; break;
case IRP_MJ_READ: irp->params.read.file = ptr; break;
case IRP_MJ_WRITE: irp->params.write.file = ptr; break;
case IRP_MJ_FLUSH_BUFFERS: irp->params.flush.file = ptr; break;
case IRP_MJ_DEVICE_CONTROL: irp->params.ioctl.file = ptr; break;
}
}
}
/* queue an irp to the device */
static obj_handle_t queue_irp( struct device_file *file, struct irp_call *irp,
const async_data_t *async_data, int blocking )
{
obj_handle_t handle = 0;
if (blocking && !(handle = alloc_handle( current->process, irp, SYNCHRONIZE, 0 ))) return 0;
if (!(irp->async = fd_queue_async( file->fd, async_data, ASYNC_TYPE_WAIT )))
{
if (handle) close_handle( current->process, handle );
return 0;
}
irp->user_arg = async_data->arg;
add_irp_to_queue( file, irp, current );
set_error( STATUS_PENDING );
return handle;
}
static enum server_fd_type device_file_get_fd_type( struct fd *fd )
{
return FD_TYPE_DEVICE;
}
static obj_handle_t device_file_read( struct fd *fd, const async_data_t *async_data, int blocking,
file_pos_t pos )
{
struct device_file *file = get_fd_user( fd );
struct irp_call *irp;
obj_handle_t handle;
irp_params_t params;
memset( &params, 0, sizeof(params) );
params.read.major = IRP_MJ_READ;
params.read.key = 0;
params.read.pos = pos;
params.read.file = file->user_ptr;
irp = create_irp( file, &params, NULL, 0, get_reply_max_size() );
if (!irp) return 0;
handle = queue_irp( file, irp, async_data, blocking );
release_object( irp );
return handle;
}
static obj_handle_t device_file_write( struct fd *fd, const async_data_t *async_data, int blocking,
file_pos_t pos, data_size_t *written )
{
struct device_file *file = get_fd_user( fd );
struct irp_call *irp;
obj_handle_t handle;
irp_params_t params;
memset( &params, 0, sizeof(params) );
params.write.major = IRP_MJ_WRITE;
params.write.key = 0;
params.write.pos = pos;
params.write.file = file->user_ptr;
irp = create_irp( file, &params, get_req_data(), get_req_data_size(), 0 );
if (!irp) return 0;
handle = queue_irp( file, irp, async_data, blocking );
release_object( irp );
return handle;
}
static obj_handle_t device_file_flush( struct fd *fd, const async_data_t *async_data, int blocking )
{
struct device_file *file = get_fd_user( fd );
struct irp_call *irp;
obj_handle_t handle;
irp_params_t params;
memset( &params, 0, sizeof(params) );
params.flush.major = IRP_MJ_FLUSH_BUFFERS;
params.flush.file = file->user_ptr;
irp = create_irp( file, &params, NULL, 0, 0 );
if (!irp) return 0;
handle = queue_irp( file, irp, async_data, blocking );
release_object( irp );
return handle;
}
static obj_handle_t device_file_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
int blocking )
{
struct device_file *file = get_fd_user( fd );
struct irp_call *irp;
obj_handle_t handle;
irp_params_t params;
memset( &params, 0, sizeof(params) );
params.ioctl.major = IRP_MJ_DEVICE_CONTROL;
params.ioctl.code = code;
params.ioctl.file = file->user_ptr;
irp = create_irp( file, &params, get_req_data(), get_req_data_size(),
get_reply_max_size() );
if (!irp) return 0;
handle = queue_irp( file, irp, async_data, blocking );
release_object( irp );
return handle;
}
static struct device *create_device( struct directory *root, const struct unicode_str *name,
struct device_manager *manager, unsigned int attr )
{
struct device *device;
if ((device = create_named_object_dir( root, name, attr, &device_ops )))
{
if (get_error() != STATUS_OBJECT_NAME_EXISTS)
{
/* initialize it if it didn't already exist */
device->unix_path = NULL;
device->manager = manager;
list_add_tail( &manager->devices, &device->entry );
list_init( &device->files );
}
}
return device;
}
struct device *create_unix_device( struct directory *root, const struct unicode_str *name,
const char *unix_path )
{
struct device *device;
if ((device = create_named_object_dir( root, name, 0, &device_ops )))
{
device->unix_path = strdup( unix_path );
device->manager = NULL; /* no manager, requests go straight to the Unix device */
list_init( &device->files );
make_object_static( &device->obj );
}
return device;
}
/* terminate requests when the underlying device is deleted */
static void delete_file( struct device_file *file )
{
struct irp_call *irp, *next;
/* terminate all pending requests */
LIST_FOR_EACH_ENTRY_SAFE( irp, next, &file->requests, struct irp_call, dev_entry )
{
list_remove( &irp->mgr_entry );
set_irp_result( irp, STATUS_FILE_DELETED, NULL, 0, 0 );
}
}
static void delete_device( struct device *device )
{
struct device_file *file, *next;
if (!device->manager) return; /* already deleted */
LIST_FOR_EACH_ENTRY_SAFE( file, next, &device->files, struct device_file, entry )
delete_file( file );
unlink_named_object( &device->obj );
list_remove( &device->entry );
device->manager = NULL;
}
static void device_manager_dump( struct object *obj, int verbose )
{
fprintf( stderr, "Device manager\n" );
}
static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry )
{
struct device_manager *manager = (struct device_manager *)obj;
return !list_empty( &manager->requests );
}
static void device_manager_destroy( struct object *obj )
{
struct device_manager *manager = (struct device_manager *)obj;
struct list *ptr;
while ((ptr = list_head( &manager->devices )))
{
struct device *device = LIST_ENTRY( ptr, struct device, entry );
delete_device( device );
}
}
static struct device_manager *create_device_manager(void)
{
struct device_manager *manager;
if ((manager = alloc_object( &device_manager_ops )))
{
list_init( &manager->devices );
list_init( &manager->requests );
}
return manager;
}
/* create a device manager */
DECL_HANDLER(create_device_manager)
{
struct device_manager *manager = create_device_manager();
if (manager)
{
reply->handle = alloc_handle( current->process, manager, req->access, req->attributes );
release_object( manager );
}
}
/* create a device */
DECL_HANDLER(create_device)
{
struct device *device;
struct unicode_str name = get_req_unicode_str();
struct device_manager *manager;
struct directory *root = NULL;
if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
0, &device_manager_ops )))
return;
if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
{
release_object( manager );
return;
}
if ((device = create_device( root, &name, manager, req->attributes )))
{
device->user_ptr = req->user_ptr;
reply->handle = alloc_handle( current->process, device, req->access, req->attributes );
release_object( device );
}
if (root) release_object( root );
release_object( manager );
}
/* delete a device */
DECL_HANDLER(delete_device)
{
struct device *device;
if ((device = (struct device *)get_handle_obj( current->process, req->handle, 0, &device_ops )))
{
delete_device( device );
release_object( device );
}
}
/* retrieve the next pending device irp request */
DECL_HANDLER(get_next_device_request)
{
struct irp_call *irp;
struct device_manager *manager;
struct list *ptr;
reply->params.major = IRP_MJ_MAXIMUM_FUNCTION + 1;
if (!(manager = (struct device_manager *)get_handle_obj( current->process, req->manager,
0, &device_manager_ops )))
return;
if (req->prev)
{
if ((irp = (struct irp_call *)get_handle_obj( current->process, req->prev, 0, &irp_call_ops )))
{
set_irp_result( irp, req->status, NULL, 0, 0 );
close_handle( current->process, req->prev ); /* avoid an extra round-trip for close */
release_object( irp );
}
clear_error();
}
if ((ptr = list_head( &manager->requests )))
{
irp = LIST_ENTRY( ptr, struct irp_call, mgr_entry );
if (irp->thread)
{
reply->client_pid = get_process_id( irp->thread->process );
reply->client_tid = get_thread_id( irp->thread );
}
reply->params = irp->params;
reply->in_size = irp->in_size;
reply->out_size = irp->out_size;
if (irp->in_size > get_reply_max_size()) set_error( STATUS_BUFFER_OVERFLOW );
else if ((reply->next = alloc_handle( current->process, irp, 0, 0 )))
{
set_reply_data_ptr( irp->in_data, irp->in_size );
irp->in_data = NULL;
irp->in_size = 0;
list_remove( &irp->mgr_entry );
list_init( &irp->mgr_entry );
}
}
else set_error( STATUS_PENDING );
release_object( manager );
}
/* store results of an async irp */
DECL_HANDLER(set_irp_result)
{
struct irp_call *irp;
if ((irp = (struct irp_call *)get_handle_obj( current->process, req->handle, 0, &irp_call_ops )))
{
if (irp->file) set_file_user_ptr( irp->file, req->file_ptr );
set_irp_result( irp, req->status, get_req_data(), get_req_data_size(), req->size );
close_handle( current->process, req->handle ); /* avoid an extra round-trip for close */
release_object( irp );
}
}
/* retrieve results of an async irp */
DECL_HANDLER(get_irp_result)
{
struct device_file *file;
struct irp_call *irp;
if (!(file = (struct device_file *)get_handle_obj( current->process, req->handle,
0, &device_file_ops )))
return;
if ((irp = find_irp_call( file, current, req->user_arg )))
{
if (irp->out_data)
{
data_size_t size = min( irp->out_size, get_reply_max_size() );
if (size)
{
set_reply_data_ptr( irp->out_data, size );
irp->out_data = NULL;
}
}
reply->size = irp->result;
set_error( irp->status );
list_remove( &irp->dev_entry );
release_object( irp ); /* no longer on the device queue */
}
release_object( file );
}
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