292 lines
12 KiB
C
292 lines
12 KiB
C
/*
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* Mount manager service implementation
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*
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* Copyright 2008 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <unistd.h>
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include "mountmgr.h"
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#include "winreg.h"
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#include "wine/library.h"
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#include "wine/list.h"
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#include "wine/unicode.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
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#define MIN_ID_LEN 4
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struct mount_point
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{
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struct list entry; /* entry in mount points list */
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DEVICE_OBJECT *device; /* disk device */
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UNICODE_STRING name; /* device name */
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UNICODE_STRING link; /* DOS device symlink */
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void *id; /* device unique id */
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unsigned int id_len;
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};
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static struct list mount_points_list = LIST_INIT(mount_points_list);
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static HKEY mount_key;
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void set_mount_point_id( struct mount_point *mount, const void *id, unsigned int id_len )
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{
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RtlFreeHeap( GetProcessHeap(), 0, mount->id );
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mount->id_len = max( MIN_ID_LEN, id_len );
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if ((mount->id = RtlAllocateHeap( GetProcessHeap(), HEAP_ZERO_MEMORY, mount->id_len )))
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{
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memcpy( mount->id, id, id_len );
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RegSetValueExW( mount_key, mount->link.Buffer, 0, REG_BINARY, mount->id, mount->id_len );
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}
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else mount->id_len = 0;
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}
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static struct mount_point *add_mount_point( DEVICE_OBJECT *device, UNICODE_STRING *device_name,
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const WCHAR *link, const void *id, unsigned int id_len )
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{
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struct mount_point *mount;
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WCHAR *str;
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UINT len = (strlenW(link) + 1) * sizeof(WCHAR) + device_name->Length + sizeof(WCHAR);
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if (!(mount = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*mount) + len ))) return NULL;
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str = (WCHAR *)(mount + 1);
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strcpyW( str, link );
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RtlInitUnicodeString( &mount->link, str );
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str += strlenW(str) + 1;
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memcpy( str, device_name->Buffer, device_name->Length );
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str[device_name->Length / sizeof(WCHAR)] = 0;
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mount->name.Buffer = str;
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mount->name.Length = device_name->Length;
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mount->name.MaximumLength = device_name->Length + sizeof(WCHAR);
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mount->device = device;
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mount->id = NULL;
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list_add_tail( &mount_points_list, &mount->entry );
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IoCreateSymbolicLink( &mount->link, device_name );
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set_mount_point_id( mount, id, id_len );
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TRACE( "created %s id %s for %s\n", debugstr_w(mount->link.Buffer),
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debugstr_a(mount->id), debugstr_w(mount->name.Buffer) );
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return mount;
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}
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/* create the DosDevices mount point symlink for a new device */
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struct mount_point *add_dosdev_mount_point( DEVICE_OBJECT *device, UNICODE_STRING *device_name,
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int drive, const void *id, unsigned int id_len )
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{
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static const WCHAR driveW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','%','c',':',0};
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WCHAR link[sizeof(driveW)];
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sprintfW( link, driveW, 'A' + drive );
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return add_mount_point( device, device_name, link, id, id_len );
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}
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/* create the Volume mount point symlink for a new device */
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struct mount_point *add_volume_mount_point( DEVICE_OBJECT *device, UNICODE_STRING *device_name,
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int drive, const void *id, unsigned int id_len )
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{
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static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{',
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'%','0','8','x','-','%','0','4','x','-','%','0','4','x','-',
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'%','0','2','x','%','0','2','x','-','%','0','2','x','%','0','2','x',
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'%','0','2','x','%','0','2','x','%','0','2','x','%','0','2','x','}',0};
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WCHAR link[sizeof(volumeW)];
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GUID guid;
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memset( &guid, 0, sizeof(guid) ); /* FIXME */
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guid.Data4[7] = 'A' + drive;
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sprintfW( link, volumeW, guid.Data1, guid.Data2, guid.Data3,
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guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
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guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
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return add_mount_point( device, device_name, link, id, id_len );
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}
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/* delete the mount point symlinks when a device goes away */
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void delete_mount_point( struct mount_point *mount )
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{
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TRACE( "deleting %s\n", debugstr_w(mount->link.Buffer) );
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list_remove( &mount->entry );
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RegDeleteValueW( mount_key, mount->link.Buffer );
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IoDeleteSymbolicLink( &mount->link );
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RtlFreeHeap( GetProcessHeap(), 0, mount->id );
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RtlFreeHeap( GetProcessHeap(), 0, mount );
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}
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/* check if a given mount point matches the requested specs */
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static BOOL matching_mount_point( const struct mount_point *mount, const MOUNTMGR_MOUNT_POINT *spec )
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{
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if (spec->SymbolicLinkNameOffset)
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{
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const WCHAR *name = (const WCHAR *)((const char *)spec + spec->SymbolicLinkNameOffset);
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if (spec->SymbolicLinkNameLength != mount->link.Length) return FALSE;
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if (memicmpW( name, mount->link.Buffer, mount->link.Length/sizeof(WCHAR)))
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return FALSE;
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}
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if (spec->DeviceNameOffset)
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{
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const WCHAR *name = (const WCHAR *)((const char *)spec + spec->DeviceNameOffset);
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if (spec->DeviceNameLength != mount->name.Length) return FALSE;
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if (memicmpW( name, mount->name.Buffer, mount->name.Length/sizeof(WCHAR)))
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return FALSE;
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}
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if (spec->UniqueIdOffset)
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{
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const void *id = ((const char *)spec + spec->UniqueIdOffset);
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if (spec->UniqueIdLength != mount->id_len) return FALSE;
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if (memcmp( id, mount->id, mount->id_len )) return FALSE;
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}
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return TRUE;
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}
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/* implementation of IOCTL_MOUNTMGR_QUERY_POINTS */
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static NTSTATUS query_mount_points( const void *in_buff, SIZE_T insize,
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void *out_buff, SIZE_T outsize, IO_STATUS_BLOCK *iosb )
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{
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UINT count, pos, size;
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const MOUNTMGR_MOUNT_POINT *input = in_buff;
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MOUNTMGR_MOUNT_POINTS *info = out_buff;
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struct mount_point *mount;
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/* sanity checks */
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if (input->SymbolicLinkNameOffset + input->SymbolicLinkNameLength > insize ||
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input->UniqueIdOffset + input->UniqueIdLength > insize ||
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input->DeviceNameOffset + input->DeviceNameLength > insize ||
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input->SymbolicLinkNameOffset + input->SymbolicLinkNameLength < input->SymbolicLinkNameOffset ||
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input->UniqueIdOffset + input->UniqueIdLength < input->UniqueIdOffset ||
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input->DeviceNameOffset + input->DeviceNameLength < input->DeviceNameOffset)
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return STATUS_INVALID_PARAMETER;
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count = size = 0;
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LIST_FOR_EACH_ENTRY( mount, &mount_points_list, struct mount_point, entry )
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{
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if (!matching_mount_point( mount, input )) continue;
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size += mount->name.Length;
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size += mount->link.Length;
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size += mount->id_len;
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size = (size + sizeof(WCHAR) - 1) & ~(sizeof(WCHAR) - 1);
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count++;
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}
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pos = FIELD_OFFSET( MOUNTMGR_MOUNT_POINTS, MountPoints[count] );
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size += pos;
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if (size > outsize)
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{
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if (size >= sizeof(info->Size)) info->Size = size;
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iosb->Information = sizeof(info->Size);
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return STATUS_MORE_ENTRIES;
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}
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info->NumberOfMountPoints = count;
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count = 0;
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LIST_FOR_EACH_ENTRY( mount, &mount_points_list, struct mount_point, entry )
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{
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if (!matching_mount_point( mount, input )) continue;
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info->MountPoints[count].DeviceNameOffset = pos;
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info->MountPoints[count].DeviceNameLength = mount->name.Length;
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memcpy( (char *)out_buff + pos, mount->name.Buffer, mount->name.Length );
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pos += mount->name.Length;
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info->MountPoints[count].SymbolicLinkNameOffset = pos;
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info->MountPoints[count].SymbolicLinkNameLength = mount->link.Length;
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memcpy( (char *)out_buff + pos, mount->link.Buffer, mount->link.Length );
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pos += mount->link.Length;
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info->MountPoints[count].UniqueIdOffset = pos;
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info->MountPoints[count].UniqueIdLength = mount->id_len;
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memcpy( (char *)out_buff + pos, mount->id, mount->id_len );
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pos += mount->id_len;
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pos = (pos + sizeof(WCHAR) - 1) & ~(sizeof(WCHAR) - 1);
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count++;
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}
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info->Size = pos;
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iosb->Information = pos;
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return STATUS_SUCCESS;
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}
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/* handler for ioctls on the mount manager device */
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static NTSTATUS WINAPI mountmgr_ioctl( DEVICE_OBJECT *device, IRP *irp )
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{
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IO_STACK_LOCATION *irpsp = irp->Tail.Overlay.s.u.CurrentStackLocation;
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TRACE( "ioctl %x insize %u outsize %u\n",
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irpsp->Parameters.DeviceIoControl.IoControlCode,
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irpsp->Parameters.DeviceIoControl.InputBufferLength,
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irpsp->Parameters.DeviceIoControl.OutputBufferLength );
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switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
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{
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case IOCTL_MOUNTMGR_QUERY_POINTS:
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if (irpsp->Parameters.DeviceIoControl.InputBufferLength < sizeof(MOUNTMGR_MOUNT_POINT))
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return STATUS_INVALID_PARAMETER;
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irp->IoStatus.u.Status = query_mount_points( irpsp->Parameters.DeviceIoControl.Type3InputBuffer,
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irpsp->Parameters.DeviceIoControl.InputBufferLength,
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irp->MdlAddress->StartVa,
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irpsp->Parameters.DeviceIoControl.OutputBufferLength,
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&irp->IoStatus );
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break;
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default:
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FIXME( "ioctl %x not supported\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
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irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
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break;
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}
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return irp->IoStatus.u.Status;
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}
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/* main entry point for the mount point manager driver */
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NTSTATUS WINAPI DriverEntry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
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{
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static const WCHAR mounted_devicesW[] = {'S','y','s','t','e','m','\\','M','o','u','n','t','e','d','D','e','v','i','c','e','s',0};
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static const WCHAR device_mountmgrW[] = {'\\','D','e','v','i','c','e','\\','M','o','u','n','t','P','o','i','n','t','M','a','n','a','g','e','r',0};
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static const WCHAR link_mountmgrW[] = {'\\','?','?','\\','M','o','u','n','t','P','o','i','n','t','M','a','n','a','g','e','r',0};
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static const WCHAR harddiskW[] = {'\\','D','r','i','v','e','r','\\','H','a','r','d','d','i','s','k',0};
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UNICODE_STRING nameW, linkW;
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DEVICE_OBJECT *device;
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NTSTATUS status;
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TRACE( "%s\n", debugstr_w(path->Buffer) );
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driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = mountmgr_ioctl;
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RtlInitUnicodeString( &nameW, device_mountmgrW );
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RtlInitUnicodeString( &linkW, link_mountmgrW );
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if (!(status = IoCreateDevice( driver, 0, &nameW, 0, 0, FALSE, &device )))
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status = IoCreateSymbolicLink( &linkW, &nameW );
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if (status)
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{
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FIXME( "failed to create device error %x\n", status );
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return status;
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}
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RegCreateKeyExW( HKEY_LOCAL_MACHINE, mounted_devicesW, 0, NULL,
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REG_OPTION_VOLATILE, KEY_ALL_ACCESS, NULL, &mount_key, NULL );
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RtlInitUnicodeString( &nameW, harddiskW );
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status = IoCreateDriver( &nameW, harddisk_driver_entry );
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initialize_hal();
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initialize_diskarbitration();
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return status;
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}
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