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13#ifndef BLOCK_BACKEND_H
14#define BLOCK_BACKEND_H
15
16#include "qemu/typedefs.h"
17#include "qapi/error.h"
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25
26#include "block/block.h"
27
28
29typedef struct BlockDevOps {
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37 void (*change_media_cb)(void *opaque, bool load);
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46 void (*eject_request_cb)(void *opaque, bool force);
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51 bool (*is_tray_open)(void *opaque);
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56 bool (*is_medium_locked)(void *opaque);
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58
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60 void (*resize_cb)(void *opaque);
61} BlockDevOps;
62
63BlockBackend *blk_new(const char *name, Error **errp);
64BlockBackend *blk_new_with_bs(const char *name, Error **errp);
65BlockBackend *blk_new_open(const char *name, const char *filename,
66 const char *reference, QDict *options, int flags,
67 Error **errp);
68void blk_ref(BlockBackend *blk);
69void blk_unref(BlockBackend *blk);
70const char *blk_name(BlockBackend *blk);
71BlockBackend *blk_by_name(const char *name);
72BlockBackend *blk_next(BlockBackend *blk);
73
74BlockDriverState *blk_bs(BlockBackend *blk);
75
76void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk);
77
78void blk_iostatus_enable(BlockBackend *blk);
79int blk_attach_dev(BlockBackend *blk, void *dev);
80void blk_attach_dev_nofail(BlockBackend *blk, void *dev);
81void blk_detach_dev(BlockBackend *blk, void *dev);
82void *blk_get_attached_dev(BlockBackend *blk);
83void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
84int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
85 int nb_sectors);
86int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
87 int nb_sectors);
88int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
89 int nb_sectors);
90BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num,
91 int nb_sectors, BdrvRequestFlags flags,
92 BlockCompletionFunc *cb, void *opaque);
93int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
94int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count);
95int64_t blk_getlength(BlockBackend *blk);
96void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
97int64_t blk_nb_sectors(BlockBackend *blk);
98BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num,
99 QEMUIOVector *iov, int nb_sectors,
100 BlockCompletionFunc *cb, void *opaque);
101BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num,
102 QEMUIOVector *iov, int nb_sectors,
103 BlockCompletionFunc *cb, void *opaque);
104BlockAIOCB *blk_aio_flush(BlockBackend *blk,
105 BlockCompletionFunc *cb, void *opaque);
106BlockAIOCB *blk_aio_discard(BlockBackend *blk,
107 int64_t sector_num, int nb_sectors,
108 BlockCompletionFunc *cb, void *opaque);
109void blk_aio_cancel(BlockAIOCB *acb);
110void blk_aio_cancel_async(BlockAIOCB *acb);
111int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs);
112int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
113BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
114 BlockCompletionFunc *cb, void *opaque);
115int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors);
116int blk_co_flush(BlockBackend *blk);
117int blk_flush(BlockBackend *blk);
118int blk_flush_all(void);
119void blk_drain_all(void);
120BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
121BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
122 int error);
123void blk_error_action(BlockBackend *blk, BlockErrorAction action,
124 bool is_read, int error);
125int blk_is_read_only(BlockBackend *blk);
126int blk_is_sg(BlockBackend *blk);
127int blk_enable_write_cache(BlockBackend *blk);
128void blk_set_enable_write_cache(BlockBackend *blk, bool wce);
129void blk_invalidate_cache(BlockBackend *blk, Error **errp);
130int blk_is_inserted(BlockBackend *blk);
131void blk_lock_medium(BlockBackend *blk, bool locked);
132void blk_eject(BlockBackend *blk, bool eject_flag);
133int blk_get_flags(BlockBackend *blk);
134int blk_get_max_transfer_length(BlockBackend *blk);
135void blk_set_guest_block_size(BlockBackend *blk, int align);
136void *blk_blockalign(BlockBackend *blk, size_t size);
137bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp);
138void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason);
139void blk_op_block_all(BlockBackend *blk, Error *reason);
140void blk_op_unblock_all(BlockBackend *blk, Error *reason);
141AioContext *blk_get_aio_context(BlockBackend *blk);
142void blk_set_aio_context(BlockBackend *blk, AioContext *new_context);
143void blk_add_aio_context_notifier(BlockBackend *blk,
144 void (*attached_aio_context)(AioContext *new_context, void *opaque),
145 void (*detach_aio_context)(void *opaque), void *opaque);
146void blk_remove_aio_context_notifier(BlockBackend *blk,
147 void (*attached_aio_context)(AioContext *,
148 void *),
149 void (*detach_aio_context)(void *),
150 void *opaque);
151void blk_add_close_notifier(BlockBackend *blk, Notifier *notify);
152void blk_io_plug(BlockBackend *blk);
153void blk_io_unplug(BlockBackend *blk);
154BlockAcctStats *blk_get_stats(BlockBackend *blk);
155
156void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
157 BlockCompletionFunc *cb, void *opaque);
158int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t sector_num,
159 int nb_sectors, BdrvRequestFlags flags);
160int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
161 const uint8_t *buf, int nb_sectors);
162int blk_truncate(BlockBackend *blk, int64_t offset);
163int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors);
164int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
165 int64_t pos, int size);
166int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size);
167int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz);
168int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo);
169
170#endif
171