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594 lines
19 KiB
C
594 lines
19 KiB
C
/*
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* Dynamic devices support
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*
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* Copyright 2006 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 "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include "mountmgr.h"
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#include "winreg.h"
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#include "winuser.h"
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#include "dbt.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 MAX_DOS_DRIVES 26
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static const WCHAR drive_types[][8] =
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{
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{ 0 }, /* DRIVE_UNKNOWN */
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{ 0 }, /* DRIVE_NO_ROOT_DIR */
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{'f','l','o','p','p','y',0}, /* DRIVE_REMOVABLE */
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{'h','d',0}, /* DRIVE_FIXED */
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{'n','e','t','w','o','r','k',0}, /* DRIVE_REMOTE */
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{'c','d','r','o','m',0}, /* DRIVE_CDROM */
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{'r','a','m','d','i','s','k',0} /* DRIVE_RAMDISK */
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};
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static const WCHAR drives_keyW[] = {'S','o','f','t','w','a','r','e','\\',
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'W','i','n','e','\\','D','r','i','v','e','s',0};
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struct dos_drive
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{
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struct list entry; /* entry in drives list */
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char *udi; /* unique identifier for dynamic drives */
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int drive; /* drive letter (0 = A: etc.) */
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DWORD type; /* drive type */
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DEVICE_OBJECT *device; /* disk device allocated for this drive */
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UNICODE_STRING name; /* device name */
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UNICODE_STRING symlink; /* device symlink if any */
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STORAGE_DEVICE_NUMBER devnum; /* device number info */
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struct mount_point *dosdev; /* DosDevices mount point */
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struct mount_point *volume; /* Volume{xxx} mount point */
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char *unix_mount; /* unix mount point path */
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};
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static struct list drives_list = LIST_INIT(drives_list);
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static DRIVER_OBJECT *harddisk_driver;
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static char *get_dosdevices_path( char **drive )
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{
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const char *config_dir = wine_get_config_dir();
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size_t len = strlen(config_dir) + sizeof("/dosdevices/a::");
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char *path = HeapAlloc( GetProcessHeap(), 0, len );
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if (path)
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{
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strcpy( path, config_dir );
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strcat( path, "/dosdevices/a::" );
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*drive = path + len - 4;
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}
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return path;
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}
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/* read a Unix symlink; returned buffer must be freed by caller */
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static char *read_symlink( const char *path )
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{
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char *buffer;
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int ret, size = 128;
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for (;;)
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{
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if (!(buffer = RtlAllocateHeap( GetProcessHeap(), 0, size )))
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{
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SetLastError( ERROR_NOT_ENOUGH_MEMORY );
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return 0;
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}
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ret = readlink( path, buffer, size );
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if (ret == -1)
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{
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RtlFreeHeap( GetProcessHeap(), 0, buffer );
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return 0;
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}
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if (ret != size)
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{
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buffer[ret] = 0;
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return buffer;
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}
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RtlFreeHeap( GetProcessHeap(), 0, buffer );
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size *= 2;
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}
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}
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/* send notification about a change to a given drive */
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static void send_notify( int drive, int code )
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{
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DWORD_PTR result;
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DEV_BROADCAST_VOLUME info;
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info.dbcv_size = sizeof(info);
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info.dbcv_devicetype = DBT_DEVTYP_VOLUME;
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info.dbcv_reserved = 0;
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info.dbcv_unitmask = 1 << drive;
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info.dbcv_flags = DBTF_MEDIA;
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result = BroadcastSystemMessageW( BSF_FORCEIFHUNG|BSF_QUERY, NULL,
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WM_DEVICECHANGE, code, (LPARAM)&info );
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}
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/* create the disk device for a given drive */
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static NTSTATUS create_disk_device( const char *udi, DWORD type, struct dos_drive **drive_ret )
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{
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static const WCHAR harddiskvolW[] = {'\\','D','e','v','i','c','e',
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'\\','H','a','r','d','d','i','s','k','V','o','l','u','m','e','%','u',0};
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static const WCHAR harddiskW[] = {'\\','D','e','v','i','c','e','\\','H','a','r','d','d','i','s','k','%','u',0};
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static const WCHAR cdromW[] = {'\\','D','e','v','i','c','e','\\','C','d','R','o','m','%','u',0};
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static const WCHAR floppyW[] = {'\\','D','e','v','i','c','e','\\','F','l','o','p','p','y','%','u',0};
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static const WCHAR physdriveW[] = {'\\','?','?','\\','P','h','y','s','i','c','a','l','D','r','i','v','e','%','u',0};
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UINT i, first = 0;
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NTSTATUS status = 0;
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const WCHAR *format;
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UNICODE_STRING name;
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DEVICE_OBJECT *dev_obj;
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struct dos_drive *drive;
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switch(type)
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{
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case DRIVE_REMOVABLE:
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format = floppyW;
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break;
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case DRIVE_CDROM:
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format = cdromW;
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break;
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case DRIVE_FIXED:
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default: /* FIXME */
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if (udi) format = harddiskW;
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else
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{
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format = harddiskvolW;
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first = 1; /* harddisk volumes start counting from 1 */
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}
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break;
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}
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name.MaximumLength = (strlenW(format) + 10) * sizeof(WCHAR);
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name.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, name.MaximumLength );
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for (i = first; i < 32; i++)
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{
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sprintfW( name.Buffer, format, i );
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name.Length = strlenW(name.Buffer) * sizeof(WCHAR);
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status = IoCreateDevice( harddisk_driver, sizeof(*drive), &name, 0, 0, FALSE, &dev_obj );
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if (status != STATUS_OBJECT_NAME_COLLISION) break;
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}
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if (!status)
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{
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drive = dev_obj->DeviceExtension;
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drive->drive = -1;
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drive->device = dev_obj;
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drive->name = name;
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drive->type = type;
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drive->dosdev = NULL;
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drive->volume = NULL;
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drive->unix_mount = NULL;
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drive->symlink.Buffer = NULL;
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if (udi)
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{
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if (!(drive->udi = HeapAlloc( GetProcessHeap(), 0, strlen(udi)+1 )))
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{
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RtlFreeUnicodeString( &name );
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IoDeleteDevice( drive->device );
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return STATUS_NO_MEMORY;
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}
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strcpy( drive->udi, udi );
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}
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switch (type)
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{
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case DRIVE_REMOVABLE:
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drive->devnum.DeviceType = FILE_DEVICE_DISK;
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drive->devnum.DeviceNumber = i;
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drive->devnum.PartitionNumber = ~0u;
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break;
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case DRIVE_CDROM:
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drive->devnum.DeviceType = FILE_DEVICE_CD_ROM;
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drive->devnum.DeviceNumber = i;
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drive->devnum.PartitionNumber = ~0u;
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break;
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case DRIVE_FIXED:
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default: /* FIXME */
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drive->devnum.DeviceType = FILE_DEVICE_DISK;
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if (udi)
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{
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UNICODE_STRING symlink;
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symlink.MaximumLength = sizeof(physdriveW) + 10 * sizeof(WCHAR);
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if ((symlink.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, symlink.MaximumLength)))
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{
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sprintfW( symlink.Buffer, physdriveW, i );
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symlink.Length = strlenW(symlink.Buffer) * sizeof(WCHAR);
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if (!IoCreateSymbolicLink( &symlink, &name )) drive->symlink = symlink;
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}
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drive->devnum.DeviceNumber = i;
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drive->devnum.PartitionNumber = 0;
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}
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else
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{
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drive->devnum.DeviceNumber = 0;
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drive->devnum.PartitionNumber = i;
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}
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break;
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}
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list_add_tail( &drives_list, &drive->entry );
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*drive_ret = drive;
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TRACE( "created device %s\n", debugstr_w(name.Buffer) );
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}
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else
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{
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FIXME( "IoCreateDevice %s got %x\n", debugstr_w(name.Buffer), status );
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RtlFreeUnicodeString( &name );
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}
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return status;
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}
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/* delete the disk device for a given drive */
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static void delete_disk_device( struct dos_drive *drive )
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{
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TRACE( "deleting device %s\n", debugstr_w(drive->name.Buffer) );
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list_remove( &drive->entry );
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if (drive->dosdev) delete_mount_point( drive->dosdev );
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if (drive->volume) delete_mount_point( drive->volume );
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if (drive->symlink.Buffer)
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{
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IoDeleteSymbolicLink( &drive->symlink );
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RtlFreeUnicodeString( &drive->symlink );
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}
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RtlFreeHeap( GetProcessHeap(), 0, drive->unix_mount );
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RtlFreeHeap( GetProcessHeap(), 0, drive->udi );
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RtlFreeUnicodeString( &drive->name );
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IoDeleteDevice( drive->device );
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}
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/* set or change the drive letter for an existing drive */
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static void set_drive_letter( struct dos_drive *drive, int letter )
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{
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void *id = NULL;
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unsigned int id_len = 0;
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if (drive->drive == letter) return;
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if (drive->dosdev) delete_mount_point( drive->dosdev );
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if (drive->volume) delete_mount_point( drive->volume );
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drive->drive = letter;
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if (letter == -1) return;
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if (drive->unix_mount)
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{
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id = drive->unix_mount;
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id_len = strlen( drive->unix_mount ) + 1;
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}
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drive->dosdev = add_dosdev_mount_point( drive->device, &drive->name, letter, id, id_len );
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drive->volume = add_volume_mount_point( drive->device, &drive->name, letter, id, id_len );
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}
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static inline int is_valid_device( struct stat *st )
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{
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#if defined(linux) || defined(__sun__)
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return S_ISBLK( st->st_mode );
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#else
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/* disks are char devices on *BSD */
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return S_ISCHR( st->st_mode );
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#endif
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}
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/* find or create a DOS drive for the corresponding device */
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static int add_drive( const char *device, DWORD type )
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{
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char *path, *p;
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char in_use[26];
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struct stat dev_st, drive_st;
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int drive, first, last, avail = 0;
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if (stat( device, &dev_st ) == -1 || !is_valid_device( &dev_st )) return -1;
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if (!(path = get_dosdevices_path( &p ))) return -1;
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memset( in_use, 0, sizeof(in_use) );
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first = 2;
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last = 26;
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if (type == DRIVE_REMOVABLE)
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{
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first = 0;
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last = 2;
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}
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while (avail != -1)
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{
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avail = -1;
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for (drive = first; drive < last; drive++)
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{
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if (in_use[drive]) continue; /* already checked */
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*p = 'a' + drive;
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if (stat( path, &drive_st ) == -1)
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{
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if (lstat( path, &drive_st ) == -1 && errno == ENOENT) /* this is a candidate */
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{
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if (avail == -1)
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{
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p[2] = 0;
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/* if mount point symlink doesn't exist either, it's available */
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if (lstat( path, &drive_st ) == -1 && errno == ENOENT) avail = drive;
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p[2] = ':';
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}
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}
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else in_use[drive] = 1;
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}
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else
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{
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in_use[drive] = 1;
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if (!is_valid_device( &drive_st )) continue;
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if (dev_st.st_rdev == drive_st.st_rdev) goto done;
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}
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}
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if (avail != -1)
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{
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/* try to use the one we found */
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drive = avail;
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*p = 'a' + drive;
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if (symlink( device, path ) != -1) goto done;
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/* failed, retry the search */
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}
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}
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drive = -1;
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done:
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HeapFree( GetProcessHeap(), 0, path );
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return drive;
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}
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static BOOL set_unix_mount_point( struct dos_drive *drive, const char *mount_point )
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{
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char *path, *p;
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BOOL modified = FALSE;
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if (!(path = get_dosdevices_path( &p ))) return FALSE;
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p[0] = 'a' + drive->drive;
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p[2] = 0;
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if (mount_point && mount_point[0])
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{
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/* try to avoid unlinking if already set correctly */
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if (!drive->unix_mount || strcmp( drive->unix_mount, mount_point ))
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{
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unlink( path );
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symlink( mount_point, path );
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modified = TRUE;
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}
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RtlFreeHeap( GetProcessHeap(), 0, drive->unix_mount );
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if ((drive->unix_mount = RtlAllocateHeap( GetProcessHeap(), 0, strlen(mount_point) + 1 )))
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strcpy( drive->unix_mount, mount_point );
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if (drive->dosdev) set_mount_point_id( drive->dosdev, mount_point, strlen(mount_point) + 1 );
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if (drive->volume) set_mount_point_id( drive->volume, mount_point, strlen(mount_point) + 1 );
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}
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else
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{
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if (unlink( path ) != -1) modified = TRUE;
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RtlFreeHeap( GetProcessHeap(), 0, drive->unix_mount );
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drive->unix_mount = NULL;
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if (drive->dosdev) set_mount_point_id( drive->dosdev, NULL, 0 );
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if (drive->volume) set_mount_point_id( drive->volume, NULL, 0 );
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}
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HeapFree( GetProcessHeap(), 0, path );
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return modified;
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}
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/* create devices for mapped drives */
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static void create_drive_devices(void)
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{
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char *path, *p, *link;
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struct dos_drive *drive;
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unsigned int i;
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HKEY drives_key;
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DWORD drive_type;
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WCHAR driveW[] = {'a',':',0};
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if (!(path = get_dosdevices_path( &p ))) return;
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if (RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &drives_key )) drives_key = 0;
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for (i = 0; i < MAX_DOS_DRIVES; i++)
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{
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p[0] = 'a' + i;
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p[2] = 0;
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if (!(link = read_symlink( path ))) continue;
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drive_type = i < 2 ? DRIVE_REMOVABLE : DRIVE_FIXED;
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if (drives_key)
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{
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WCHAR buffer[32];
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DWORD j, type, size = sizeof(buffer);
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driveW[0] = 'a' + i;
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if (!RegQueryValueExW( drives_key, driveW, NULL, &type, (BYTE *)buffer, &size ) &&
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type == REG_SZ)
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{
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for (j = 0; j < sizeof(drive_types)/sizeof(drive_types[0]); j++)
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if (drive_types[j][0] && !strcmpiW( buffer, drive_types[j] ))
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{
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drive_type = j;
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break;
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}
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}
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}
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if (!create_disk_device( NULL, drive_type, &drive ))
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{
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drive->unix_mount = link;
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set_drive_letter( drive, i );
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}
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else RtlFreeHeap( GetProcessHeap(), 0, link );
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}
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RegCloseKey( drives_key );
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RtlFreeHeap( GetProcessHeap(), 0, path );
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}
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BOOL add_dos_device( const char *udi, const char *device, const char *mount_point, DWORD type )
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{
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struct dos_drive *drive, *next;
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int letter = add_drive( device, type );
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if (letter == -1) return FALSE;
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LIST_FOR_EACH_ENTRY_SAFE( drive, next, &drives_list, struct dos_drive, entry )
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{
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if (drive->udi && !strcmp( udi, drive->udi ))
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{
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if (type == drive->type) goto found;
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delete_disk_device( drive );
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continue;
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}
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if (drive->drive == letter) delete_disk_device( drive );
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}
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if (create_disk_device( udi, type, &drive )) return FALSE;
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found:
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set_drive_letter( drive, letter );
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set_unix_mount_point( drive, mount_point );
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if (drive->drive != -1)
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{
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HKEY hkey;
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TRACE( "added device %c: udi %s for %s on %s type %u\n",
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'a' + drive->drive, wine_dbgstr_a(udi), wine_dbgstr_a(device),
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wine_dbgstr_a(mount_point), type );
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/* hack: force the drive type in the registry */
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if (!RegCreateKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
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{
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const WCHAR *type_name = drive_types[type];
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WCHAR name[3] = {'a',':',0};
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name[0] += drive->drive;
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if (type_name[0])
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RegSetValueExW( hkey, name, 0, REG_SZ, (const BYTE *)type_name,
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(strlenW(type_name) + 1) * sizeof(WCHAR) );
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else
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RegDeleteValueW( hkey, name );
|
|
RegCloseKey( hkey );
|
|
}
|
|
|
|
send_notify( drive->drive, DBT_DEVICEARRIVAL );
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL remove_dos_device( const char *udi )
|
|
{
|
|
HKEY hkey;
|
|
struct dos_drive *drive;
|
|
|
|
LIST_FOR_EACH_ENTRY( drive, &drives_list, struct dos_drive, entry )
|
|
{
|
|
if (!drive->udi || strcmp( udi, drive->udi )) continue;
|
|
|
|
if (drive->drive != -1)
|
|
{
|
|
BOOL modified = set_unix_mount_point( drive, NULL );
|
|
|
|
/* clear the registry key too */
|
|
if (!RegOpenKeyW( HKEY_LOCAL_MACHINE, drives_keyW, &hkey ))
|
|
{
|
|
WCHAR name[3] = {'a',':',0};
|
|
name[0] += drive->drive;
|
|
RegDeleteValueW( hkey, name );
|
|
RegCloseKey( hkey );
|
|
}
|
|
|
|
if (modified) send_notify( drive->drive, DBT_DEVICEREMOVECOMPLETE );
|
|
}
|
|
delete_disk_device( drive );
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* handler for ioctls on the harddisk device */
|
|
static NTSTATUS WINAPI harddisk_ioctl( DEVICE_OBJECT *device, IRP *irp )
|
|
{
|
|
IO_STACK_LOCATION *irpsp = irp->Tail.Overlay.s.u.CurrentStackLocation;
|
|
struct dos_drive *drive = device->DeviceExtension;
|
|
|
|
TRACE( "ioctl %x insize %u outsize %u\n",
|
|
irpsp->Parameters.DeviceIoControl.IoControlCode,
|
|
irpsp->Parameters.DeviceIoControl.InputBufferLength,
|
|
irpsp->Parameters.DeviceIoControl.OutputBufferLength );
|
|
|
|
switch(irpsp->Parameters.DeviceIoControl.IoControlCode)
|
|
{
|
|
case IOCTL_DISK_GET_DRIVE_GEOMETRY:
|
|
{
|
|
DISK_GEOMETRY info;
|
|
DWORD len = min( sizeof(info), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
|
|
|
|
info.Cylinders.QuadPart = 10000;
|
|
info.MediaType = (drive->devnum.DeviceType == FILE_DEVICE_DISK) ? FixedMedia : RemovableMedia;
|
|
info.TracksPerCylinder = 255;
|
|
info.SectorsPerTrack = 63;
|
|
info.BytesPerSector = 512;
|
|
memcpy( irp->MdlAddress->StartVa, &info, len );
|
|
irp->IoStatus.Information = len;
|
|
irp->IoStatus.u.Status = STATUS_SUCCESS;
|
|
break;
|
|
}
|
|
case IOCTL_STORAGE_GET_DEVICE_NUMBER:
|
|
{
|
|
DWORD len = min( sizeof(drive->devnum), irpsp->Parameters.DeviceIoControl.OutputBufferLength );
|
|
|
|
memcpy( irp->MdlAddress->StartVa, &drive->devnum, len );
|
|
irp->IoStatus.Information = len;
|
|
irp->IoStatus.u.Status = STATUS_SUCCESS;
|
|
break;
|
|
}
|
|
case IOCTL_CDROM_READ_TOC:
|
|
irp->IoStatus.u.Status = STATUS_INVALID_DEVICE_REQUEST;
|
|
break;
|
|
default:
|
|
FIXME( "unsupported ioctl %x\n", irpsp->Parameters.DeviceIoControl.IoControlCode );
|
|
irp->IoStatus.u.Status = STATUS_NOT_SUPPORTED;
|
|
break;
|
|
}
|
|
return irp->IoStatus.u.Status;
|
|
}
|
|
|
|
/* driver entry point for the harddisk driver */
|
|
NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path )
|
|
{
|
|
struct dos_drive *drive;
|
|
|
|
harddisk_driver = driver;
|
|
driver->MajorFunction[IRP_MJ_DEVICE_CONTROL] = harddisk_ioctl;
|
|
|
|
/* create a harddisk0 device that isn't assigned to any drive */
|
|
create_disk_device( "harddisk0 placeholder", DRIVE_FIXED, &drive );
|
|
|
|
create_drive_devices();
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|