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2 * Block layer I/O functions
4 * Copyright (c) 2003 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
25 #ifndef BLOCK_COROUTINES_H
26 #define BLOCK_COROUTINES_H
28 #include "block/block_int.h"
30 /* For blk_bs() in generated block/block-gen.c */
31 #include "sysemu/block-backend.h"
34 * I/O API functions. These functions are thread-safe.
36 * See include/block/block-io.h for more information about
40 int coroutine_fn
bdrv_co_check(BlockDriverState
*bs
,
41 BdrvCheckResult
*res
, BdrvCheckMode fix
);
42 int coroutine_fn
bdrv_co_invalidate_cache(BlockDriverState
*bs
, Error
**errp
);
45 bdrv_co_common_block_status_above(BlockDriverState
*bs
,
46 BlockDriverState
*base
,
53 BlockDriverState
**file
,
56 int coroutine_fn
bdrv_co_readv_vmstate(BlockDriverState
*bs
,
57 QEMUIOVector
*qiov
, int64_t pos
);
58 int coroutine_fn
bdrv_co_writev_vmstate(BlockDriverState
*bs
,
59 QEMUIOVector
*qiov
, int64_t pos
);
62 nbd_co_do_establish_connection(BlockDriverState
*bs
, bool blocking
,
67 blk_co_do_pwritev_part(BlockBackend
*blk
, int64_t offset
, int64_t bytes
,
68 QEMUIOVector
*qiov
, size_t qiov_offset
,
69 BdrvRequestFlags flags
);
72 blk_co_do_ioctl(BlockBackend
*blk
, unsigned long int req
, void *buf
);
75 blk_co_do_pdiscard(BlockBackend
*blk
, int64_t offset
, int64_t bytes
);
77 int coroutine_fn
blk_co_do_flush(BlockBackend
*blk
);
81 * "I/O or GS" API functions. These functions can run without
82 * the BQL, but only in one specific iothread/main loop.
84 * See include/block/block-io.h for more information about
85 * the "I/O or GS" API.
88 int generated_co_wrapper
89 bdrv_preadv(BdrvChild
*child
, int64_t offset
, int64_t bytes
,
90 QEMUIOVector
*qiov
, BdrvRequestFlags flags
);
92 int generated_co_wrapper
93 bdrv_pwritev(BdrvChild
*child
, int64_t offset
, int64_t bytes
,
94 QEMUIOVector
*qiov
, BdrvRequestFlags flags
);
96 int generated_co_wrapper
97 bdrv_common_block_status_above(BlockDriverState
*bs
,
98 BlockDriverState
*base
,
105 BlockDriverState
**file
,
107 int generated_co_wrapper
108 nbd_do_establish_connection(BlockDriverState
*bs
, bool blocking
, Error
**errp
);
110 int generated_co_wrapper
111 blk_do_ioctl(BlockBackend
*blk
, unsigned long int req
, void *buf
);
113 int generated_co_wrapper
114 blk_do_pdiscard(BlockBackend
*blk
, int64_t offset
, int64_t bytes
);
116 int generated_co_wrapper
blk_do_flush(BlockBackend
*blk
);
118 #endif /* BLOCK_COROUTINES_H */