include/sysemu/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/block.h"
  14 #include "qemu/queue.h"
  15
  16 typedef enum {
  17     IF_DEFAULT = -1,            /* for use with drive_add() only */
  18     /*
  19      * IF_NONE must be zero, because we want MachineClass member
  20      * block_default_type to default-initialize to IF_NONE
  21      */
  22     IF_NONE = 0,
  23     IF_IDE, IF_SCSI, IF_FLOPPY, IF_PFLASH, IF_MTD, IF_SD, IF_VIRTIO, IF_XEN,
  24     IF_COUNT
  25 } BlockInterfaceType;
  26
  27 struct DriveInfo {
  28     BlockInterfaceType type;
  29     int bus;
  30     int unit;
  31     int auto_del;               /* see blockdev_mark_auto_del() */
  32     bool is_default;            /* Added by default_drive() ?  */
  33     int media_cd;
  34     QemuOpts *opts;
  35     QTAILQ_ENTRY(DriveInfo) next;
  36 };
  37
  38 /*
  39  * Global state (GS) API. These functions run under the BQL.
  40  *
  41  * See include/block/block-global-state.h for more information about
  42  * the GS API.
  43  */
  44
  45 void blockdev_mark_auto_del(BlockBackend *blk);
  46 void blockdev_auto_del(BlockBackend *blk);
  47
  48 DriveInfo *blk_legacy_dinfo(BlockBackend *blk);
  49 DriveInfo *blk_set_legacy_dinfo(BlockBackend *blk, DriveInfo *dinfo);
  50 BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo);
  51
  52 void override_max_devs(BlockInterfaceType type, int max_devs);
  53
  54 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
  55 void drive_check_orphaned(void);
  56 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index);
  57 int drive_get_max_bus(BlockInterfaceType type);
  58
  59 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
  60                     const char *optstr);
  61 DriveInfo *drive_new(QemuOpts *arg, BlockInterfaceType block_default_type,
  62                      Error **errp);
  63
  64 #endif