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#include "osd.h"
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void osd_t::outbox_push(osd_client_t & cl, osd_op_t *cur_op)
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{
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assert(cur_op->peer_fd);
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if (cur_op->op_type == OSD_OP_OUT)
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{
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gettimeofday(&cur_op->tv_begin, NULL);
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}
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if (cl.write_state == 0)
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{
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cl.write_state = CL_WRITE_READY;
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write_ready_clients.push_back(cur_op->peer_fd);
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}
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cl.outbox.push_back(cur_op);
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ringloop->wakeup();
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}
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void osd_t::send_replies()
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{
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for (int i = 0; i < write_ready_clients.size(); i++)
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{
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int peer_fd = write_ready_clients[i];
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auto & cl = clients[peer_fd];
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io_uring_sqe* sqe = ringloop->get_sqe();
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if (!sqe)
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{
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write_ready_clients.erase(write_ready_clients.begin(), write_ready_clients.begin() + i);
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return;
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}
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ring_data_t* data = ((ring_data_t*)sqe->user_data);
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if (!cl.write_buf)
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{
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// pick next command
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cl.write_op = cl.outbox.front();
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cl.outbox.pop_front();
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if (cl.write_op->op_type == OSD_OP_OUT)
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{
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cl.write_buf = &cl.write_op->req.buf;
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cl.write_remaining = OSD_PACKET_SIZE;
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cl.write_state = CL_WRITE_REPLY;
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}
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else
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{
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// Measure execution latency
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timeval tv_end;
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gettimeofday(&tv_end, NULL);
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op_stat_count[cl.write_op->req.hdr.opcode]++;
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op_stat_sum[cl.write_op->req.hdr.opcode] += (
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(tv_end.tv_sec - cl.write_op->tv_begin.tv_sec)*1000000 +
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tv_end.tv_usec - cl.write_op->tv_begin.tv_usec
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);
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cl.write_buf = &cl.write_op->reply.buf;
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cl.write_remaining = OSD_PACKET_SIZE;
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cl.write_state = CL_WRITE_REPLY;
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}
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}
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cl.write_iov.iov_base = cl.write_buf;
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cl.write_iov.iov_len = cl.write_remaining;
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cl.write_msg.msg_iov = &cl.write_iov;
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cl.write_msg.msg_iovlen = 1;
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// FIXME: This is basically a busy-loop. It may be better to add epoll here(?)
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data->callback = [this, peer_fd](ring_data_t *data) { handle_send(data, peer_fd); };
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my_uring_prep_sendmsg(sqe, peer_fd, &cl.write_msg, 0);
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cl.write_state = cl.write_state | SQE_SENT;
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}
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write_ready_clients.clear();
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}
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void osd_t::handle_send(ring_data_t *data, int peer_fd)
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{
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auto cl_it = clients.find(peer_fd);
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if (cl_it != clients.end())
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{
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auto & cl = cl_it->second;
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if (data->res < 0 && data->res != -EAGAIN)
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{
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// this is a client socket, so don't panic. just disconnect it
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printf("Client %d socket write error: %d (%s). Disconnecting client\n", peer_fd, -data->res, strerror(-data->res));
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stop_client(peer_fd);
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return;
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}
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cl.write_state = cl.write_state & ~SQE_SENT;
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if (data->res > 0)
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{
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cl.write_remaining -= data->res;
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cl.write_buf += data->res;
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if (cl.write_remaining <= 0)
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{
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cl.write_buf = NULL;
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osd_op_t *cur_op = cl.write_op;
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if (cur_op->send_list.sent < cur_op->send_list.count)
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{
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// Send data
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cl.write_buf = cur_op->send_list[cur_op->send_list.sent].buf;
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assert(cl.write_buf);
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cl.write_remaining = cur_op->send_list[cur_op->send_list.sent].len;
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cur_op->send_list.sent++;
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cl.write_state = CL_WRITE_DATA;
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}
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else
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{
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// Done
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if (cur_op->op_type == OSD_OP_IN)
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{
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delete cur_op;
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}
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else
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{
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cl.sent_ops[cl.write_op->req.hdr.id] = cl.write_op;
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}
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cl.write_op = NULL;
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cl.write_state = cl.outbox.size() > 0 ? CL_WRITE_READY : 0;
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}
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}
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}
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if (cl.write_state != 0)
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{
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write_ready_clients.push_back(peer_fd);
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}
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}
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}
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