static struct object *create_file_obj( struct fd *fd, unsigned int access, unsigned int options )
{
struct file *file = alloc_object( &file_ops );
if (!file) return NULL;
file->access = access;
file->options = options;
file->fd = fd;
grab_object( fd );
set_fd_user( fd, &file_fd_ops, &file->obj );
return &file->obj;
}
static struct object *create_file_obj( struct fd *fd, unsigned int access, mode_t mode )
{
struct file *file = alloc_object( &file_ops );
if (!file) return NULL;
file->access = access;
file->mode = mode;
file->uid = ~(uid_t)0;
file->fd = fd;
grab_object( fd );
set_fd_user( fd, &file_fd_ops, &file->obj );
return &file->obj;
}
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( ¶ms, 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, ¶ms, NULL, 0, 0 )))
{
add_irp_to_queue( file, irp, NULL );
release_object( irp );
}
}
return &file->obj;
}
static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
{
int acceptfd;
struct fd *newfd;
if ( sock->deferred )
{
newfd = dup_fd_object( sock->deferred->fd, 0, 0,
get_fd_options( acceptsock->fd ) );
if ( !newfd )
return FALSE;
set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
release_object( sock->deferred );
sock->deferred = NULL;
}
else
{
if ((acceptfd = accept_new_fd( sock )) == -1)
return FALSE;
if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
get_fd_options( acceptsock->fd ) )))
return FALSE;
}
acceptsock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
acceptsock->hmask = 0;
acceptsock->pmask = 0;
acceptsock->polling = 0;
acceptsock->type = sock->type;
acceptsock->family = sock->family;
acceptsock->wparam = 0;
acceptsock->deferred = NULL;
release_object( acceptsock->fd );
acceptsock->fd = newfd;
clear_error();
sock->pmask &= ~FD_ACCEPT;
sock->hmask &= ~FD_ACCEPT;
sock_reselect( sock );
return TRUE;
}
/* create a file by duplicating an fd object */
struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigned int sharing )
{
struct file *file;
struct stat st;
if (fstat( get_unix_fd(fd), &st ) == -1)
{
file_set_error();
return NULL;
}
if ((file = alloc_object( &file_ops )))
{
file->mode = st.st_mode;
file->access = default_fd_map_access( &file->obj, access );
if (!(file->fd = dup_fd_object( fd, access, sharing, FILE_SYNCHRONOUS_IO_NONALERT )))
{
release_object( file );
return NULL;
}
set_fd_user( file->fd, &file_fd_ops, &file->obj );
}
return file;
}
static struct object *create_mapping( struct object *root, const struct unicode_str *name,
unsigned int attr, mem_size_t size, unsigned int flags,
obj_handle_t handle, unsigned int file_access,
const struct security_descriptor *sd )
{
struct mapping *mapping;
struct file *file;
struct fd *fd;
int unix_fd;
struct stat st;
if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
if (!(mapping = create_named_object( root, &mapping_ops, name, attr, sd )))
return NULL;
if (get_error() == STATUS_OBJECT_NAME_EXISTS)
return &mapping->obj; /* Nothing else to do */
mapping->size = size;
mapping->fd = NULL;
mapping->shared = NULL;
mapping->committed = NULL;
if (!(mapping->flags = get_mapping_flags( handle, flags ))) goto error;
if (handle)
{
const unsigned int sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
unsigned int mapping_access = FILE_MAPPING_ACCESS;
if (!(file = get_file_obj( current->process, handle, file_access ))) goto error;
fd = get_obj_fd( (struct object *)file );
/* file sharing rules for mappings are different so we use magic the access rights */
if (flags & SEC_IMAGE) mapping_access |= FILE_MAPPING_IMAGE;
else if (file_access & FILE_WRITE_DATA) mapping_access |= FILE_MAPPING_WRITE;
if (!(mapping->fd = get_fd_object_for_mapping( fd, mapping_access, sharing )))
{
mapping->fd = dup_fd_object( fd, mapping_access, sharing, FILE_SYNCHRONOUS_IO_NONALERT );
if (mapping->fd) set_fd_user( mapping->fd, &mapping_fd_ops, NULL );
}
release_object( file );
release_object( fd );
if (!mapping->fd) goto error;
if ((unix_fd = get_unix_fd( mapping->fd )) == -1) goto error;
if (fstat( unix_fd, &st ) == -1)
{
file_set_error();
goto error;
}
if (flags & SEC_IMAGE)
{
unsigned int err = get_image_params( mapping, st.st_size, unix_fd );
if (!err) return &mapping->obj;
set_error( err );
goto error;
}
if (!mapping->size)
{
if (!(mapping->size = st.st_size))
{
set_error( STATUS_MAPPED_FILE_SIZE_ZERO );
goto error;
}
}
else if (st.st_size < mapping->size)
{
if (!(file_access & FILE_WRITE_DATA))
{
set_error( STATUS_SECTION_TOO_BIG );
goto error;
}
if (!grow_file( unix_fd, mapping->size )) goto error;
}
}
else /* Anonymous mapping (no associated file) */
{
if (!mapping->size)
{
set_error( STATUS_INVALID_PARAMETER );
goto error;
}
if ((flags & SEC_RESERVE) && !(mapping->committed = create_ranges())) goto error;
mapping->size = (mapping->size + page_mask) & ~((mem_size_t)page_mask);
if ((unix_fd = create_temp_file( mapping->size )) == -1) goto error;
if (!(mapping->fd = create_anonymous_fd( &mapping_fd_ops, unix_fd, &mapping->obj,
FILE_SYNCHRONOUS_IO_NONALERT ))) goto error;
allow_fd_caching( mapping->fd );
}
return &mapping->obj;
error:
release_object( mapping );
return NULL;
}
