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block: Use blk_co_preadv() for blk_read()

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This patch introduces blk_co_preadv() as a central function on the
BlockBackend level that is supposed to handle all read requests from the
BB to its root BDS eventually.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2016-03-08 13:47:47 +01:00
parent f21d96d04b
commit 1bf1cbc91f
3 changed files with 65 additions and 8 deletions
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4
include/block/block_int.h
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@ -508,6 +508,10 @@ extern BlockDriver bdrv_qcow2;
*/
void bdrv_setup_io_funcs(BlockDriver *bdrv);
int coroutine_fn bdrv_co_do_preadv(BlockDriverState *bs,
int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
int get_tmp_filename(char *filename, int size);
BlockDriver *bdrv_probe_all(const uint8_t *buf, int buf_size,
const char *filename);