xref: /openbmc/qemu/block/coroutines.h (revision bbadfb2e)
1 /*
2  * Block layer I/O functions
3  *
4  * Copyright (c) 2003 Fabrice Bellard
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #ifndef BLOCK_COROUTINES_H
26 #define BLOCK_COROUTINES_H
27 
28 #include "block/block_int.h"
29 
30 /* For blk_bs() in generated block/block-gen.c */
31 #include "sysemu/block-backend.h"
32 
33 /*
34  * I/O API functions. These functions are thread-safe.
35  *
36  * See include/block/block-io.h for more information about
37  * the I/O API.
38  */
39 
40 int coroutine_fn GRAPH_RDLOCK
41 bdrv_co_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
42 
43 int coroutine_fn GRAPH_RDLOCK
44 bdrv_co_invalidate_cache(BlockDriverState *bs, Error **errp);
45 
46 int coroutine_fn GRAPH_RDLOCK
47 bdrv_co_common_block_status_above(BlockDriverState *bs,
48                                   BlockDriverState *base,
49                                   bool include_base,
50                                   bool want_zero,
51                                   int64_t offset,
52                                   int64_t bytes,
53                                   int64_t *pnum,
54                                   int64_t *map,
55                                   BlockDriverState **file,
56                                   int *depth);
57 
58 int coroutine_fn GRAPH_RDLOCK
59 bdrv_co_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
60 
61 int coroutine_fn GRAPH_RDLOCK
62 bdrv_co_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
63 
64 int coroutine_fn
65 nbd_co_do_establish_connection(BlockDriverState *bs, bool blocking,
66                                Error **errp);
67 
68 
69 /*
70  * "I/O or GS" API functions. These functions can run without
71  * the BQL, but only in one specific iothread/main loop.
72  *
73  * See include/block/block-io.h for more information about
74  * the "I/O or GS" API.
75  */
76 
77 int co_wrapper_mixed_bdrv_rdlock
78 bdrv_common_block_status_above(BlockDriverState *bs,
79                                BlockDriverState *base,
80                                bool include_base,
81                                bool want_zero,
82                                int64_t offset,
83                                int64_t bytes,
84                                int64_t *pnum,
85                                int64_t *map,
86                                BlockDriverState **file,
87                                int *depth);
88 int co_wrapper_mixed
89 nbd_do_establish_connection(BlockDriverState *bs, bool blocking, Error **errp);
90 
91 #endif /* BLOCK_COROUTINES_H */
92