1
2
3
4
5
6
7
8
9
10
11
12
13#ifndef BLOCK_BACKEND_H
14#define BLOCK_BACKEND_H
15
16#include "qemu/iov.h"
17
18
19
20
21
22
23
24
25#include "block/block.h"
26
27
28typedef struct BlockDevOps {
29
30
31
32
33
34
35
36 void (*change_media_cb)(void *opaque, bool load);
37
38
39
40
41
42
43
44
45 void (*eject_request_cb)(void *opaque, bool force);
46
47
48
49
50 bool (*is_tray_open)(void *opaque);
51
52
53
54
55 bool (*is_medium_locked)(void *opaque);
56
57
58
59 void (*resize_cb)(void *opaque);
60} BlockDevOps;
61
62BlockBackend *blk_new(Error **errp);
63BlockBackend *blk_new_with_bs(Error **errp);
64BlockBackend *blk_new_open(const char *filename, const char *reference,
65 QDict *options, int flags, Error **errp);
66int blk_get_refcnt(BlockBackend *blk);
67void blk_ref(BlockBackend *blk);
68void blk_unref(BlockBackend *blk);
69void blk_remove_all_bs(void);
70const char *blk_name(BlockBackend *blk);
71BlockBackend *blk_by_name(const char *name);
72BlockBackend *blk_next(BlockBackend *blk);
73BlockDriverState *blk_next_root_bs(BlockDriverState *bs);
74bool monitor_add_blk(BlockBackend *blk, const char *name, Error **errp);
75void monitor_remove_blk(BlockBackend *blk);
76
77BlockDriverState *blk_bs(BlockBackend *blk);
78void blk_remove_bs(BlockBackend *blk);
79void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
80
81void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
82void blk_iostatus_enable(BlockBackend *blk);
83bool blk_iostatus_is_enabled(const BlockBackend *blk);
84BlockDeviceIoStatus blk_iostatus(const BlockBackend *blk);
85void blk_iostatus_disable(BlockBackend *blk);
86void blk_iostatus_reset(BlockBackend *blk);
87void blk_iostatus_set_err(BlockBackend *blk, int error);
88int blk_attach_dev(BlockBackend *blk, void *dev);
89void blk_attach_dev_nofail(BlockBackend *blk, void *dev);
90void blk_detach_dev(BlockBackend *blk, void *dev);
91void *blk_get_attached_dev(BlockBackend *blk);
92void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
93int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
94 int nb_sectors);
95int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
96 int nb_sectors);
97int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
98 int nb_sectors);
99int blk_write_zeroes(BlockBackend *blk, int64_t sector_num,
100 int nb_sectors, BdrvRequestFlags flags);
101BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num,
102 int nb_sectors, BdrvRequestFlags flags,
103 BlockCompletionFunc *cb, void *opaque);
104int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
105int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count);
106int64_t blk_getlength(BlockBackend *blk);
107void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
108int64_t blk_nb_sectors(BlockBackend *blk);
109BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num,
110 QEMUIOVector *iov, int nb_sectors,
111 BlockCompletionFunc *cb, void *opaque);
112BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset,
113 QEMUIOVector *qiov, BdrvRequestFlags flags,
114 BlockCompletionFunc *cb, void *opaque);
115BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num,
116 QEMUIOVector *iov, int nb_sectors,
117 BlockCompletionFunc *cb, void *opaque);
118BlockAIOCB *blk_aio_pwritev(BlockBackend *blk, int64_t offset,
119 QEMUIOVector *qiov, BdrvRequestFlags flags,
120 BlockCompletionFunc *cb, void *opaque);
121BlockAIOCB *blk_aio_flush(BlockBackend *blk,
122 BlockCompletionFunc *cb, void *opaque);
123BlockAIOCB *blk_aio_discard(BlockBackend *blk,
124 int64_t sector_num, int nb_sectors,
125 BlockCompletionFunc *cb, void *opaque);
126void blk_aio_cancel(BlockAIOCB *acb);
127void blk_aio_cancel_async(BlockAIOCB *acb);
128int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs);
129int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
130BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
131 BlockCompletionFunc *cb, void *opaque);
132int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors);
133int blk_co_flush(BlockBackend *blk);
134int blk_flush(BlockBackend *blk);
135int blk_flush_all(void);
136int blk_commit_all(void);
137void blk_drain(BlockBackend *blk);
138void blk_drain_all(void);
139void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
140 BlockdevOnError on_write_error);
141BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
142BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
143 int error);
144void blk_error_action(BlockBackend *blk, BlockErrorAction action,
145 bool is_read, int error);
146int blk_is_read_only(BlockBackend *blk);
147int blk_is_sg(BlockBackend *blk);
148int blk_enable_write_cache(BlockBackend *blk);
149void blk_set_enable_write_cache(BlockBackend *blk, bool wce);
150void blk_invalidate_cache(BlockBackend *blk, Error **errp);
151bool blk_is_inserted(BlockBackend *blk);
152bool blk_is_available(BlockBackend *blk);
153void blk_lock_medium(BlockBackend *blk, bool locked);
154void blk_eject(BlockBackend *blk, bool eject_flag);
155int blk_get_flags(BlockBackend *blk);
156int blk_get_max_transfer_length(BlockBackend *blk);
157int blk_get_max_iov(BlockBackend *blk);
158void blk_set_guest_block_size(BlockBackend *blk, int align);
159void *blk_try_blockalign(BlockBackend *blk, size_t size);
160void *blk_blockalign(BlockBackend *blk, size_t size);
161bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp);
162void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason);
163void blk_op_block_all(BlockBackend *blk, Error *reason);
164void blk_op_unblock_all(BlockBackend *blk, Error *reason);
165AioContext *blk_get_aio_context(BlockBackend *blk);
166void blk_set_aio_context(BlockBackend *blk, AioContext *new_context);
167void blk_add_aio_context_notifier(BlockBackend *blk,
168 void (*attached_aio_context)(AioContext *new_context, void *opaque),
169 void (*detach_aio_context)(void *opaque), void *opaque);
170void blk_remove_aio_context_notifier(BlockBackend *blk,
171 void (*attached_aio_context)(AioContext *,
172 void *),
173 void (*detach_aio_context)(void *),
174 void *opaque);
175void blk_add_remove_bs_notifier(BlockBackend *blk, Notifier *notify);
176void blk_add_insert_bs_notifier(BlockBackend *blk, Notifier *notify);
177void blk_io_plug(BlockBackend *blk);
178void blk_io_unplug(BlockBackend *blk);
179BlockAcctStats *blk_get_stats(BlockBackend *blk);
180BlockBackendRootState *blk_get_root_state(BlockBackend *blk);
181void blk_update_root_state(BlockBackend *blk);
182void blk_apply_root_state(BlockBackend *blk, BlockDriverState *bs);
183int blk_get_open_flags_from_root_state(BlockBackend *blk);
184
185void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
186 BlockCompletionFunc *cb, void *opaque);
187int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t sector_num,
188 int nb_sectors, BdrvRequestFlags flags);
189int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
190 const uint8_t *buf, int nb_sectors);
191int blk_truncate(BlockBackend *blk, int64_t offset);
192int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors);
193int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
194 int64_t pos, int size);
195int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size);
196int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz);
197int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo);
198BlockAIOCB *blk_abort_aio_request(BlockBackend *blk,
199 BlockCompletionFunc *cb,
200 void *opaque, int ret);
201
202#endif
203