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13#ifndef BLOCK_BACKEND_H
14#define BLOCK_BACKEND_H
15
16#include "qemu/iov.h"
17#include "block/throttle-groups.h"
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25
26#include "block/block.h"
27
28
29typedef struct BlockDevOps {
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36
37 void (*change_media_cb)(void *opaque, bool load, Error **errp);
38
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46 void (*eject_request_cb)(void *opaque, bool force);
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48
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50
51 bool (*is_tray_open)(void *opaque);
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56 bool (*is_medium_locked)(void *opaque);
57
58
59
60 void (*resize_cb)(void *opaque);
61
62
63
64 void (*drained_begin)(void *opaque);
65
66
67
68 void (*drained_end)(void *opaque);
69} BlockDevOps;
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71
72
73
74
75typedef struct BlockBackendPublic {
76 ThrottleGroupMember throttle_group_member;
77} BlockBackendPublic;
78
79BlockBackend *blk_new(uint64_t perm, uint64_t shared_perm);
80BlockBackend *blk_new_open(const char *filename, const char *reference,
81 QDict *options, int flags, Error **errp);
82int blk_get_refcnt(BlockBackend *blk);
83void blk_ref(BlockBackend *blk);
84void blk_unref(BlockBackend *blk);
85void blk_remove_all_bs(void);
86const char *blk_name(const BlockBackend *blk);
87BlockBackend *blk_by_name(const char *name);
88BlockBackend *blk_next(BlockBackend *blk);
89BlockBackend *blk_all_next(BlockBackend *blk);
90bool monitor_add_blk(BlockBackend *blk, const char *name, Error **errp);
91void monitor_remove_blk(BlockBackend *blk);
92
93BlockBackendPublic *blk_get_public(BlockBackend *blk);
94BlockBackend *blk_by_public(BlockBackendPublic *public);
95
96BlockDriverState *blk_bs(BlockBackend *blk);
97void blk_remove_bs(BlockBackend *blk);
98int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp);
99bool bdrv_has_blk(BlockDriverState *bs);
100bool bdrv_is_root_node(BlockDriverState *bs);
101int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm,
102 Error **errp);
103void blk_get_perm(BlockBackend *blk, uint64_t *perm, uint64_t *shared_perm);
104
105void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
106void blk_iostatus_enable(BlockBackend *blk);
107bool blk_iostatus_is_enabled(const BlockBackend *blk);
108BlockDeviceIoStatus blk_iostatus(const BlockBackend *blk);
109void blk_iostatus_disable(BlockBackend *blk);
110void blk_iostatus_reset(BlockBackend *blk);
111void blk_iostatus_set_err(BlockBackend *blk, int error);
112int blk_attach_dev(BlockBackend *blk, DeviceState *dev);
113void blk_detach_dev(BlockBackend *blk, DeviceState *dev);
114DeviceState *blk_get_attached_dev(BlockBackend *blk);
115char *blk_get_attached_dev_id(BlockBackend *blk);
116BlockBackend *blk_by_dev(void *dev);
117BlockBackend *blk_by_qdev_id(const char *id, Error **errp);
118void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
119int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
120 int bytes);
121int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
122 unsigned int bytes, QEMUIOVector *qiov,
123 BdrvRequestFlags flags);
124int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
125 unsigned int bytes, QEMUIOVector *qiov,
126 BdrvRequestFlags flags);
127int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
128 int bytes, BdrvRequestFlags flags);
129BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
130 int bytes, BdrvRequestFlags flags,
131 BlockCompletionFunc *cb, void *opaque);
132int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags);
133int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int bytes);
134int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int bytes,
135 BdrvRequestFlags flags);
136int64_t blk_getlength(BlockBackend *blk);
137void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
138int64_t blk_nb_sectors(BlockBackend *blk);
139BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset,
140 QEMUIOVector *qiov, BdrvRequestFlags flags,
141 BlockCompletionFunc *cb, void *opaque);
142BlockAIOCB *blk_aio_pwritev(BlockBackend *blk, int64_t offset,
143 QEMUIOVector *qiov, BdrvRequestFlags flags,
144 BlockCompletionFunc *cb, void *opaque);
145BlockAIOCB *blk_aio_flush(BlockBackend *blk,
146 BlockCompletionFunc *cb, void *opaque);
147BlockAIOCB *blk_aio_pdiscard(BlockBackend *blk, int64_t offset, int bytes,
148 BlockCompletionFunc *cb, void *opaque);
149void blk_aio_cancel(BlockAIOCB *acb);
150void blk_aio_cancel_async(BlockAIOCB *acb);
151int blk_co_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
152int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
153BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
154 BlockCompletionFunc *cb, void *opaque);
155int blk_co_pdiscard(BlockBackend *blk, int64_t offset, int bytes);
156int blk_co_flush(BlockBackend *blk);
157int blk_flush(BlockBackend *blk);
158int blk_commit_all(void);
159void blk_inc_in_flight(BlockBackend *blk);
160void blk_dec_in_flight(BlockBackend *blk);
161void blk_drain(BlockBackend *blk);
162void blk_drain_all(void);
163void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
164 BlockdevOnError on_write_error);
165BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
166BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
167 int error);
168void blk_error_action(BlockBackend *blk, BlockErrorAction action,
169 bool is_read, int error);
170bool blk_is_read_only(BlockBackend *blk);
171bool blk_is_sg(BlockBackend *blk);
172bool blk_enable_write_cache(BlockBackend *blk);
173void blk_set_enable_write_cache(BlockBackend *blk, bool wce);
174void blk_invalidate_cache(BlockBackend *blk, Error **errp);
175bool blk_is_inserted(BlockBackend *blk);
176bool blk_is_available(BlockBackend *blk);
177void blk_lock_medium(BlockBackend *blk, bool locked);
178void blk_eject(BlockBackend *blk, bool eject_flag);
179int blk_get_flags(BlockBackend *blk);
180uint32_t blk_get_request_alignment(BlockBackend *blk);
181uint32_t blk_get_max_transfer(BlockBackend *blk);
182int blk_get_max_iov(BlockBackend *blk);
183void blk_set_guest_block_size(BlockBackend *blk, int align);
184void *blk_try_blockalign(BlockBackend *blk, size_t size);
185void *blk_blockalign(BlockBackend *blk, size_t size);
186bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp);
187void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason);
188void blk_op_block_all(BlockBackend *blk, Error *reason);
189void blk_op_unblock_all(BlockBackend *blk, Error *reason);
190AioContext *blk_get_aio_context(BlockBackend *blk);
191void blk_set_aio_context(BlockBackend *blk, AioContext *new_context);
192void blk_add_aio_context_notifier(BlockBackend *blk,
193 void (*attached_aio_context)(AioContext *new_context, void *opaque),
194 void (*detach_aio_context)(void *opaque), void *opaque);
195void blk_remove_aio_context_notifier(BlockBackend *blk,
196 void (*attached_aio_context)(AioContext *,
197 void *),
198 void (*detach_aio_context)(void *),
199 void *opaque);
200void blk_add_remove_bs_notifier(BlockBackend *blk, Notifier *notify);
201void blk_add_insert_bs_notifier(BlockBackend *blk, Notifier *notify);
202void blk_io_plug(BlockBackend *blk);
203void blk_io_unplug(BlockBackend *blk);
204BlockAcctStats *blk_get_stats(BlockBackend *blk);
205BlockBackendRootState *blk_get_root_state(BlockBackend *blk);
206void blk_update_root_state(BlockBackend *blk);
207bool blk_get_detect_zeroes_from_root_state(BlockBackend *blk);
208int blk_get_open_flags_from_root_state(BlockBackend *blk);
209
210void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
211 BlockCompletionFunc *cb, void *opaque);
212int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
213 int bytes, BdrvRequestFlags flags);
214int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
215 int bytes);
216int blk_truncate(BlockBackend *blk, int64_t offset, PreallocMode prealloc,
217 Error **errp);
218int blk_pdiscard(BlockBackend *blk, int64_t offset, int bytes);
219int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
220 int64_t pos, int size);
221int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size);
222int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz);
223int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo);
224BlockAIOCB *blk_abort_aio_request(BlockBackend *blk,
225 BlockCompletionFunc *cb,
226 void *opaque, int ret);
227
228void blk_set_io_limits(BlockBackend *blk, ThrottleConfig *cfg);
229void blk_io_limits_disable(BlockBackend *blk);
230void blk_io_limits_enable(BlockBackend *blk, const char *group);
231void blk_io_limits_update_group(BlockBackend *blk, const char *group);
232void blk_set_force_allow_inactivate(BlockBackend *blk);
233
234void blk_register_buf(BlockBackend *blk, void *host, size_t size);
235void blk_unregister_buf(BlockBackend *blk, void *host);
236
237int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
238 BlockBackend *blk_out, int64_t off_out,
239 int bytes, BdrvRequestFlags read_flags,
240 BdrvRequestFlags write_flags);
241
242const BdrvChild *blk_root(BlockBackend *blk);
243
244#endif
245