static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req, struct iovec *iov, int niov, bool create, enum AIOCBState aiocb_type) { int nr_copies = s->inode.nr_copies; SheepdogObjReq hdr; unsigned int wlen = 0; int ret; uint64_t oid = aio_req->oid; unsigned int datalen = aio_req->data_len; uint64_t offset = aio_req->offset; uint8_t flags = aio_req->flags; uint64_t old_oid = aio_req->base_oid; if (!nr_copies) { error_report("bug"); } memset(&hdr, 0, sizeof(hdr)); switch (aiocb_type) { case AIOCB_FLUSH_CACHE: hdr.opcode = SD_OP_FLUSH_VDI; break; case AIOCB_READ_UDATA: hdr.opcode = SD_OP_READ_OBJ; hdr.flags = flags; break; case AIOCB_WRITE_UDATA: if (create) { hdr.opcode = SD_OP_CREATE_AND_WRITE_OBJ; } else { hdr.opcode = SD_OP_WRITE_OBJ; } wlen = datalen; hdr.flags = SD_FLAG_CMD_WRITE | flags; break; case AIOCB_DISCARD_OBJ: hdr.opcode = SD_OP_DISCARD_OBJ; break; } if (s->cache_flags) { hdr.flags |= s->cache_flags; } hdr.oid = oid; hdr.cow_oid = old_oid; hdr.copies = s->inode.nr_copies; hdr.data_length = datalen; hdr.offset = offset; hdr.id = aio_req->id; qemu_co_mutex_lock(&s->lock); s->co_send = qemu_coroutine_self(); aio_set_fd_handler(s->aio_context, s->fd, co_read_response, co_write_request, s); socket_set_cork(s->fd, 1); /* send a header */ ret = qemu_co_send(s->fd, &hdr, sizeof(hdr)); if (ret != sizeof(hdr)) { error_report("failed to send a req, %s", strerror(errno)); goto out; } if (wlen) { ret = qemu_co_sendv(s->fd, iov, niov, aio_req->iov_offset, wlen); if (ret != wlen) { error_report("failed to send a data, %s", strerror(errno)); } } out: socket_set_cork(s->fd, 0); aio_set_fd_handler(s->aio_context, s->fd, co_read_response, NULL, s); s->co_send = NULL; qemu_co_mutex_unlock(&s->lock); }