qemu/block/coroutines.h
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   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
  40int coroutine_fn bdrv_co_check(BlockDriverState *bs,
  41                               BdrvCheckResult *res, BdrvCheckMode fix);
  42int coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs, Error **errp);
  43
  44int coroutine_fn
  45bdrv_co_common_block_status_above(BlockDriverState *bs,
  46                                  BlockDriverState *base,
  47                                  bool include_base,
  48                                  bool want_zero,
  49                                  int64_t offset,
  50                                  int64_t bytes,
  51                                  int64_t *pnum,
  52                                  int64_t *map,
  53                                  BlockDriverState **file,
  54                                  int *depth);
  55
  56int coroutine_fn bdrv_co_readv_vmstate(BlockDriverState *bs,
  57                                       QEMUIOVector *qiov, int64_t pos);
  58int coroutine_fn bdrv_co_writev_vmstate(BlockDriverState *bs,
  59                                        QEMUIOVector *qiov, int64_t pos);
  60
  61int coroutine_fn
  62nbd_co_do_establish_connection(BlockDriverState *bs, bool blocking,
  63                               Error **errp);
  64
  65
  66/*
  67 * "I/O or GS" API functions. These functions can run without
  68 * the BQL, but only in one specific iothread/main loop.
  69 *
  70 * See include/block/block-io.h for more information about
  71 * the "I/O or GS" API.
  72 */
  73
  74int generated_co_wrapper
  75bdrv_common_block_status_above(BlockDriverState *bs,
  76                               BlockDriverState *base,
  77                               bool include_base,
  78                               bool want_zero,
  79                               int64_t offset,
  80                               int64_t bytes,
  81                               int64_t *pnum,
  82                               int64_t *map,
  83                               BlockDriverState **file,
  84                               int *depth);
  85int generated_co_wrapper
  86nbd_do_establish_connection(BlockDriverState *bs, bool blocking, Error **errp);
  87
  88#endif /* BLOCK_COROUTINES_H */
  89