80 static int null_open(BlockDriverState *bs, QDict *options, int flags,  in null_open()  argument
84     BDRVNullState *s = bs->opaque;  in null_open()
99     bs->supported_write_flags = BDRV_REQ_FUA;  in null_open()
103 static int64_t coroutine_fn null_co_getlength(BlockDriverState *bs)  in null_co_getlength()  argument
105     BDRVNullState *s = bs->opaque;  in null_co_getlength()
109 static coroutine_fn int null_co_common(BlockDriverState *bs)  in null_co_common()  argument
111     BDRVNullState *s = bs->opaque;  in null_co_common()
119 static coroutine_fn int null_co_preadv(BlockDriverState *bs,  in null_co_preadv()  argument
124     BDRVNullState *s = bs->opaque;  in null_co_preadv()
130     return null_co_common(bs);  in null_co_preadv()
133 static coroutine_fn int null_co_pwritev(BlockDriverState *bs,  in null_co_pwritev()  argument
138     return null_co_common(bs);  in null_co_pwritev()
141 static coroutine_fn int null_co_flush(BlockDriverState *bs)  in null_co_flush()  argument
143     return null_co_common(bs);  in null_co_flush()
170 static inline BlockAIOCB *null_aio_common(BlockDriverState *bs,  in null_aio_common()  argument
175     BDRVNullState *s = bs->opaque;  in null_aio_common()
177     acb = qemu_aio_get(&null_aiocb_info, bs, cb, opaque);  in null_aio_common()
180         aio_timer_init(bdrv_get_aio_context(bs), &acb->timer,  in null_aio_common()
186         replay_bh_schedule_oneshot_event(bdrv_get_aio_context(bs),  in null_aio_common()
192 static BlockAIOCB *null_aio_preadv(BlockDriverState *bs,  in null_aio_preadv()  argument
198     BDRVNullState *s = bs->opaque;  in null_aio_preadv()
204     return null_aio_common(bs, cb, opaque);  in null_aio_preadv()
207 static BlockAIOCB *null_aio_pwritev(BlockDriverState *bs,  in null_aio_pwritev()  argument
213     return null_aio_common(bs, cb, opaque);  in null_aio_pwritev()
216 static BlockAIOCB *null_aio_flush(BlockDriverState *bs,  in null_aio_flush()  argument
220     return null_aio_common(bs, cb, opaque);  in null_aio_flush()
229 static int coroutine_fn null_co_block_status(BlockDriverState *bs,  in null_co_block_status()  argument
235     BDRVNullState *s = bs->opaque;  in null_co_block_status()
240     *file = bs;  in null_co_block_status()
248 static void null_refresh_filename(BlockDriverState *bs)  in null_refresh_filename()  argument
252     for (e = qdict_first(bs->full_open_options); e;  in null_refresh_filename()
253          e = qdict_next(bs->full_open_options, e))  in null_refresh_filename()
264     snprintf(bs->exact_filename, sizeof(bs->exact_filename), "%s://",  in null_refresh_filename()
265              bs->drv->format_name);  in null_refresh_filename()
269 null_co_get_allocated_file_size(BlockDriverState *bs)  in null_co_get_allocated_file_size()  argument