blockdev.h

   1 /*
   2  * QEMU host block devices
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or
   7  * later.  See the COPYING file in the top-level directory.
   8  */
   9
  10 #ifndef BLOCKDEV_H
  11 #define BLOCKDEV_H
  12
  13 #include "block.h"
  14 #include "qemu-queue.h"
  15
  16 typedef enum {
  17     IF_NONE,
  18     IF_IDE, IF_SCSI, IF_FLOPPY, IF_PFLASH, IF_MTD, IF_SD, IF_VIRTIO, IF_XEN,
  19     IF_COUNT
  20 } BlockInterfaceType;
  21
  22 typedef enum {
  23     BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
  24     BLOCK_ERR_STOP_ANY
  25 } BlockInterfaceErrorAction;
  26
  27 #define BLOCK_SERIAL_STRLEN 20
  28
  29 typedef struct DriveInfo {
  30     BlockDriverState *bdrv;
  31     char *id;
  32     const char *devaddr;
  33     BlockInterfaceType type;
  34     int bus;
  35     int unit;
  36     QemuOpts *opts;
  37     BlockInterfaceErrorAction on_read_error;
  38     BlockInterfaceErrorAction on_write_error;
  39     char serial[BLOCK_SERIAL_STRLEN + 1];
  40     QTAILQ_ENTRY(DriveInfo) next;
  41 } DriveInfo;
  42
  43 #define MAX_IDE_DEVS    2
  44 #define MAX_SCSI_DEVS   7
  45
  46 extern QTAILQ_HEAD(drivelist, DriveInfo) drives;
  47
  48 extern DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
  49 extern DriveInfo *drive_get_by_id(const char *id);
  50 extern int drive_get_max_bus(BlockInterfaceType type);
  51 extern void drive_uninit(DriveInfo *dinfo);
  52 extern const char *drive_get_serial(BlockDriverState *bdrv);
  53
  54 extern BlockInterfaceErrorAction drive_get_on_error(
  55     BlockDriverState *bdrv, int is_read);
  56
  57 extern QemuOpts *drive_add(const char *file, const char *fmt, ...);
  58 extern DriveInfo *drive_init(QemuOpts *arg, int default_to_scsi,
  59                              int *fatal_error);
  60
  61 /* device-hotplug */
  62
  63 DriveInfo *add_init_drive(const char *opts);
  64
  65 void do_commit(Monitor *mon, const QDict *qdict);
  66 int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data);
  67 int do_block_set_passwd(Monitor *mon, const QDict *qdict, QObject **ret_data);
  68 int do_change_block(Monitor *mon, const char *device,
  69                     const char *filename, const char *fmt);
  70
  71 extern DriveInfo *extboot_drive;
  72
  73 #endif