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Device models should access their block backends only through the block-backend.h API. Convert them, and drop direct includes of inappropriate headers. Just four uses of BlockDriverState are left: * The Xen paravirtual block device backend (xen_disk.c) opens images itself when set up via xenbus, bypassing blockdev.c. I figure it should go through qmp_blockdev_add() instead. * Device model "usb-storage" prompts for keys. No other device model does, and this one probably shouldn't do it, either. * ide_issue_trim_cb() uses bdrv_aio_discard() instead of blk_aio_discard() because it fishes its backend out of a BlockAIOCB, which has only the BlockDriverState. * PC87312State has an unused BlockDriverState[] member. The next two commits take care of the latter two. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
107 lines
4.7 KiB
C
107 lines
4.7 KiB
C
/*
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* QEMU Block backends
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*
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* Copyright (C) 2014 Red Hat, Inc.
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*
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* Authors:
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* Markus Armbruster <armbru@redhat.com>,
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1
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* or later. See the COPYING.LIB file in the top-level directory.
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*/
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#ifndef BLOCK_BACKEND_H
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#define BLOCK_BACKEND_H
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#include "qemu/typedefs.h"
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#include "qapi/error.h"
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/*
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* TODO Have to include block/block.h for a bunch of block layer
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* types. Unfortunately, this pulls in the whole BlockDriverState
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* API, which we don't want used by many BlockBackend users. Some of
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* the types belong here, and the rest should be split into a common
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* header and one for the BlockDriverState API.
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*/
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#include "block/block.h"
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BlockBackend *blk_new(const char *name, Error **errp);
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BlockBackend *blk_new_with_bs(const char *name, Error **errp);
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void blk_ref(BlockBackend *blk);
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void blk_unref(BlockBackend *blk);
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const char *blk_name(BlockBackend *blk);
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BlockBackend *blk_by_name(const char *name);
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BlockBackend *blk_next(BlockBackend *blk);
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BlockDriverState *blk_bs(BlockBackend *blk);
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void blk_hide_on_behalf_of_do_drive_del(BlockBackend *blk);
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void blk_iostatus_enable(BlockBackend *blk);
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int blk_attach_dev(BlockBackend *blk, void *dev);
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void blk_attach_dev_nofail(BlockBackend *blk, void *dev);
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void blk_detach_dev(BlockBackend *blk, void *dev);
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void *blk_get_attached_dev(BlockBackend *blk);
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void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
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int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
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int nb_sectors);
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int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
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int nb_sectors);
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int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
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int nb_sectors);
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BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num,
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int nb_sectors, BdrvRequestFlags flags,
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BlockCompletionFunc *cb, void *opaque);
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int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
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int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count);
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int64_t blk_getlength(BlockBackend *blk);
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void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
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BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num,
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QEMUIOVector *iov, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque);
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BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num,
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QEMUIOVector *iov, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque);
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BlockAIOCB *blk_aio_flush(BlockBackend *blk,
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BlockCompletionFunc *cb, void *opaque);
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BlockAIOCB *blk_aio_discard(BlockBackend *blk,
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int64_t sector_num, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque);
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void blk_aio_cancel(BlockAIOCB *acb);
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void blk_aio_cancel_async(BlockAIOCB *acb);
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int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs);
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int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
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BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
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BlockCompletionFunc *cb, void *opaque);
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int blk_flush(BlockBackend *blk);
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int blk_flush_all(void);
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void blk_drain_all(void);
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BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
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BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
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int error);
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void blk_error_action(BlockBackend *blk, BlockErrorAction action,
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bool is_read, int error);
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int blk_is_read_only(BlockBackend *blk);
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int blk_is_sg(BlockBackend *blk);
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int blk_enable_write_cache(BlockBackend *blk);
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void blk_set_enable_write_cache(BlockBackend *blk, bool wce);
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int blk_is_inserted(BlockBackend *blk);
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void blk_lock_medium(BlockBackend *blk, bool locked);
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void blk_eject(BlockBackend *blk, bool eject_flag);
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int blk_get_flags(BlockBackend *blk);
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void blk_set_guest_block_size(BlockBackend *blk, int align);
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void *blk_blockalign(BlockBackend *blk, size_t size);
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bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp);
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void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason);
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void blk_op_block_all(BlockBackend *blk, Error *reason);
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void blk_op_unblock_all(BlockBackend *blk, Error *reason);
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AioContext *blk_get_aio_context(BlockBackend *blk);
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void blk_set_aio_context(BlockBackend *blk, AioContext *new_context);
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void blk_io_plug(BlockBackend *blk);
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void blk_io_unplug(BlockBackend *blk);
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BlockAcctStats *blk_get_stats(BlockBackend *blk);
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void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
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BlockCompletionFunc *cb, void *opaque);
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#endif
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