a7f53e26a6
Move device model attachment / detachment and the BlockDevOps device
model callbacks and their wrappers from BlockDriverState to
BlockBackend.
Wrapper calls in block.c change from
bdrv_dev_FOO_cb(bs, ...)
to
if (bs->blk) {
bdrv_dev_FOO_cb(bs->blk, ...);
}
No change, because both bdrv_dev_change_media_cb() and
bdrv_dev_resize_cb() do nothing when no device model is attached, and
a device model can be attached only when bs->blk.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
143 lines
6.1 KiB
C
143 lines
6.1 KiB
C
/*
|
|
* QEMU Block backends
|
|
*
|
|
* Copyright (C) 2014 Red Hat, Inc.
|
|
*
|
|
* Authors:
|
|
* Markus Armbruster <armbru@redhat.com>,
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1
|
|
* or later. See the COPYING.LIB file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef BLOCK_BACKEND_H
|
|
#define BLOCK_BACKEND_H
|
|
|
|
#include "qemu/typedefs.h"
|
|
#include "qapi/error.h"
|
|
|
|
/*
|
|
* TODO Have to include block/block.h for a bunch of block layer
|
|
* types. Unfortunately, this pulls in the whole BlockDriverState
|
|
* API, which we don't want used by many BlockBackend users. Some of
|
|
* the types belong here, and the rest should be split into a common
|
|
* header and one for the BlockDriverState API.
|
|
*/
|
|
#include "block/block.h"
|
|
|
|
/* Callbacks for block device models */
|
|
typedef struct BlockDevOps {
|
|
/*
|
|
* Runs when virtual media changed (monitor commands eject, change)
|
|
* Argument load is true on load and false on eject.
|
|
* Beware: doesn't run when a host device's physical media
|
|
* changes. Sure would be useful if it did.
|
|
* Device models with removable media must implement this callback.
|
|
*/
|
|
void (*change_media_cb)(void *opaque, bool load);
|
|
/*
|
|
* Runs when an eject request is issued from the monitor, the tray
|
|
* is closed, and the medium is locked.
|
|
* Device models that do not implement is_medium_locked will not need
|
|
* this callback. Device models that can lock the medium or tray might
|
|
* want to implement the callback and unlock the tray when "force" is
|
|
* true, even if they do not support eject requests.
|
|
*/
|
|
void (*eject_request_cb)(void *opaque, bool force);
|
|
/*
|
|
* Is the virtual tray open?
|
|
* Device models implement this only when the device has a tray.
|
|
*/
|
|
bool (*is_tray_open)(void *opaque);
|
|
/*
|
|
* Is the virtual medium locked into the device?
|
|
* Device models implement this only when device has such a lock.
|
|
*/
|
|
bool (*is_medium_locked)(void *opaque);
|
|
/*
|
|
* Runs when the size changed (e.g. monitor command block_resize)
|
|
*/
|
|
void (*resize_cb)(void *opaque);
|
|
} BlockDevOps;
|
|
|
|
BlockBackend *blk_new(const char *name, Error **errp);
|
|
BlockBackend *blk_new_with_bs(const char *name, Error **errp);
|
|
void blk_ref(BlockBackend *blk);
|
|
void blk_unref(BlockBackend *blk);
|
|
const char *blk_name(BlockBackend *blk);
|
|
BlockBackend *blk_by_name(const char *name);
|
|
BlockBackend *blk_next(BlockBackend *blk);
|
|
|
|
BlockDriverState *blk_bs(BlockBackend *blk);
|
|
|
|
void blk_hide_on_behalf_of_do_drive_del(BlockBackend *blk);
|
|
|
|
void blk_iostatus_enable(BlockBackend *blk);
|
|
int blk_attach_dev(BlockBackend *blk, void *dev);
|
|
void blk_attach_dev_nofail(BlockBackend *blk, void *dev);
|
|
void blk_detach_dev(BlockBackend *blk, void *dev);
|
|
void *blk_get_attached_dev(BlockBackend *blk);
|
|
void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
|
|
int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
|
|
int nb_sectors);
|
|
int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
|
|
int nb_sectors);
|
|
int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
|
|
int nb_sectors);
|
|
BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num,
|
|
int nb_sectors, BdrvRequestFlags flags,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
|
|
int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count);
|
|
int64_t blk_getlength(BlockBackend *blk);
|
|
void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
|
|
BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num,
|
|
QEMUIOVector *iov, int nb_sectors,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num,
|
|
QEMUIOVector *iov, int nb_sectors,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_flush(BlockBackend *blk,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_discard(BlockBackend *blk,
|
|
int64_t sector_num, int nb_sectors,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
void blk_aio_cancel(BlockAIOCB *acb);
|
|
void blk_aio_cancel_async(BlockAIOCB *acb);
|
|
int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs);
|
|
int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
|
|
BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
int blk_flush(BlockBackend *blk);
|
|
int blk_flush_all(void);
|
|
void blk_drain_all(void);
|
|
BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
|
|
BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
|
|
int error);
|
|
void blk_error_action(BlockBackend *blk, BlockErrorAction action,
|
|
bool is_read, int error);
|
|
int blk_is_read_only(BlockBackend *blk);
|
|
int blk_is_sg(BlockBackend *blk);
|
|
int blk_enable_write_cache(BlockBackend *blk);
|
|
void blk_set_enable_write_cache(BlockBackend *blk, bool wce);
|
|
int blk_is_inserted(BlockBackend *blk);
|
|
void blk_lock_medium(BlockBackend *blk, bool locked);
|
|
void blk_eject(BlockBackend *blk, bool eject_flag);
|
|
int blk_get_flags(BlockBackend *blk);
|
|
void blk_set_guest_block_size(BlockBackend *blk, int align);
|
|
void *blk_blockalign(BlockBackend *blk, size_t size);
|
|
bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp);
|
|
void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason);
|
|
void blk_op_block_all(BlockBackend *blk, Error *reason);
|
|
void blk_op_unblock_all(BlockBackend *blk, Error *reason);
|
|
AioContext *blk_get_aio_context(BlockBackend *blk);
|
|
void blk_set_aio_context(BlockBackend *blk, AioContext *new_context);
|
|
void blk_io_plug(BlockBackend *blk);
|
|
void blk_io_unplug(BlockBackend *blk);
|
|
BlockAcctStats *blk_get_stats(BlockBackend *blk);
|
|
|
|
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
|
|
#endif
|