LXR qemu/block/coroutines.h

   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_INT_H
  26#define BLOCK_COROUTINES_INT_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, Error **errp);
  63
  64
  65int coroutine_fn
  66blk_co_do_preadv(BlockBackend *blk, int64_t offset, int64_t bytes,
  67                 QEMUIOVector *qiov, BdrvRequestFlags flags);
  68
  69
  70int coroutine_fn
  71blk_co_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
  72                       QEMUIOVector *qiov, size_t qiov_offset,
  73                       BdrvRequestFlags flags);
  74
  75int coroutine_fn
  76blk_co_do_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
  77
  78int coroutine_fn
  79blk_co_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
  80
  81int coroutine_fn blk_co_do_flush(BlockBackend *blk);
  82
  83
  84/*
  85 * "I/O or GS" API functions. These functions can run without
  86 * the BQL, but only in one specific iothread/main loop.
  87 *
  88 * See include/block/block-io.h for more information about
  89 * the "I/O or GS" API.
  90 */
  91
  92int generated_co_wrapper
  93bdrv_preadv(BdrvChild *child, int64_t offset, unsigned int bytes,
  94            QEMUIOVector *qiov, BdrvRequestFlags flags);
  95
  96int generated_co_wrapper
  97bdrv_pwritev(BdrvChild *child, int64_t offset, unsigned int bytes,
  98             QEMUIOVector *qiov, BdrvRequestFlags flags);
  99
 100int generated_co_wrapper
 101bdrv_common_block_status_above(BlockDriverState *bs,
 102                               BlockDriverState *base,
 103                               bool include_base,
 104                               bool want_zero,
 105                               int64_t offset,
 106                               int64_t bytes,
 107                               int64_t *pnum,
 108                               int64_t *map,
 109                               BlockDriverState **file,
 110                               int *depth);
 111int generated_co_wrapper
 112nbd_do_establish_connection(BlockDriverState *bs, Error **errp);
 113
 114int generated_co_wrapper
 115blk_do_preadv(BlockBackend *blk, int64_t offset, int64_t bytes,
 116              QEMUIOVector *qiov, BdrvRequestFlags flags);
 117
 118int generated_co_wrapper
 119blk_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
 120                    QEMUIOVector *qiov, size_t qiov_offset,
 121                    BdrvRequestFlags flags);
 122
 123int generated_co_wrapper
 124blk_do_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
 125
 126int generated_co_wrapper
 127blk_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
 128
 129int generated_co_wrapper blk_do_flush(BlockBackend *blk);
 130
 131#endif /* BLOCK_COROUTINES_INT_H */
 132