276 lines
9.1 KiB
C++
276 lines
9.1 KiB
C++
#include "messenger.h"
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void osd_messenger_t::read_requests()
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{
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while (read_ready_clients.size() > 0)
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{
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int peer_fd = read_ready_clients[0];
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auto & cl = clients[peer_fd];
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if (!cl.read_op || cl.read_remaining < receive_buffer_size)
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{
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cl.read_iov.iov_base = cl.in_buf;
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cl.read_iov.iov_len = receive_buffer_size;
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}
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else
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{
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cl.read_iov.iov_base = cl.read_buf;
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cl.read_iov.iov_len = cl.read_remaining;
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}
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cl.read_msg.msg_iov = &cl.read_iov;
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cl.read_msg.msg_iovlen = 1;
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read_ready_clients.erase(read_ready_clients.begin(), read_ready_clients.begin() + 1);
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int result = recvmsg(peer_fd, &cl.read_msg, 0);
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if (result < 0)
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{
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result = -errno;
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}
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{
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timespec now;
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clock_gettime(CLOCK_REALTIME, &now);
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printf("recvmsg done %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
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}
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handle_read(result, peer_fd);
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}
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}
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bool osd_messenger_t::handle_read(int result, 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 (result < 0 && result != -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 read error: %d (%s). Disconnecting client\n", peer_fd, -result, strerror(-result));
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stop_client(peer_fd);
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return false;
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}
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if (result == -EAGAIN || result < cl.read_iov.iov_len)
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{
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cl.read_ready--;
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if (cl.read_ready > 0)
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read_ready_clients.push_back(peer_fd);
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}
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else
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{
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read_ready_clients.push_back(peer_fd);
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}
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if (result > 0)
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{
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if (cl.read_iov.iov_base == cl.in_buf)
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{
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// Compose operation(s) from the buffer
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int remain = result;
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void *curbuf = cl.in_buf;
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while (remain > 0)
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{
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if (!cl.read_op)
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{
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cl.read_op = new osd_op_t;
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cl.read_op->peer_fd = peer_fd;
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cl.read_op->op_type = OSD_OP_IN;
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cl.read_buf = cl.read_op->req.buf;
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cl.read_remaining = OSD_PACKET_SIZE;
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cl.read_state = CL_READ_HDR;
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}
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if (cl.read_remaining > remain)
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{
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memcpy(cl.read_buf, curbuf, remain);
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cl.read_remaining -= remain;
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cl.read_buf += remain;
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remain = 0;
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if (cl.read_remaining <= 0)
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handle_finished_read(cl);
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}
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else
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{
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memcpy(cl.read_buf, curbuf, cl.read_remaining);
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curbuf += cl.read_remaining;
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remain -= cl.read_remaining;
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cl.read_remaining = 0;
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cl.read_buf = NULL;
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handle_finished_read(cl);
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}
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}
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}
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else
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{
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// Long data
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cl.read_remaining -= result;
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cl.read_buf += result;
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if (cl.read_remaining <= 0)
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{
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handle_finished_read(cl);
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}
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}
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if (result >= cl.read_iov.iov_len)
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{
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return true;
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}
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}
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}
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return false;
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}
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void osd_messenger_t::handle_finished_read(osd_client_t & cl)
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{
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if (cl.read_state == CL_READ_HDR)
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{
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if (cl.read_op->req.hdr.magic == SECONDARY_OSD_REPLY_MAGIC)
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handle_reply_hdr(&cl);
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else
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handle_op_hdr(&cl);
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}
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else if (cl.read_state == CL_READ_DATA)
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{
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// Operation is ready
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cl.received_ops.push_back(cl.read_op);
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exec_op(cl.read_op);
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cl.read_op = NULL;
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cl.read_state = 0;
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}
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else if (cl.read_state == CL_READ_REPLY_DATA)
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{
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// Reply is ready
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auto req_it = cl.sent_ops.find(cl.read_reply_id);
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osd_op_t *request = req_it->second;
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cl.sent_ops.erase(req_it);
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cl.read_reply_id = 0;
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delete cl.read_op;
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cl.read_op = NULL;
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cl.read_state = 0;
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// Measure subop latency
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timespec tv_end;
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clock_gettime(CLOCK_REALTIME, &tv_end);
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stats.subop_stat_count[request->req.hdr.opcode]++;
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if (!stats.subop_stat_count[request->req.hdr.opcode])
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{
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stats.subop_stat_count[request->req.hdr.opcode]++;
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stats.subop_stat_sum[request->req.hdr.opcode] = 0;
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}
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stats.subop_stat_sum[request->req.hdr.opcode] += (
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(tv_end.tv_sec - request->tv_begin.tv_sec)*1000000 +
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(tv_end.tv_nsec - request->tv_begin.tv_nsec)/1000
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);
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request->callback(request);
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}
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else
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{
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assert(0);
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}
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}
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void osd_messenger_t::handle_op_hdr(osd_client_t *cl)
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{
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osd_op_t *cur_op = cl->read_op;
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if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ)
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{
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if (cur_op->req.sec_rw.len > 0)
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cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.sec_rw.len);
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cl->read_remaining = 0;
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE)
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{
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if (cur_op->req.sec_rw.len > 0)
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cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.sec_rw.len);
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cl->read_remaining = cur_op->req.sec_rw.len;
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_STABILIZE ||
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cur_op->req.hdr.opcode == OSD_OP_SECONDARY_ROLLBACK)
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{
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if (cur_op->req.sec_stab.len > 0)
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cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.sec_stab.len);
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cl->read_remaining = cur_op->req.sec_stab.len;
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_READ)
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{
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if (cur_op->req.rw.len > 0)
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cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.rw.len);
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cl->read_remaining = 0;
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_WRITE)
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{
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if (cur_op->req.rw.len > 0)
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cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.rw.len);
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cl->read_remaining = cur_op->req.rw.len;
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}
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if (cl->read_remaining > 0)
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{
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// Read data
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cl->read_buf = cur_op->buf;
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cl->read_state = CL_READ_DATA;
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}
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else
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{
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// Operation is ready
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cl->read_op = NULL;
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cl->read_state = 0;
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cl->received_ops.push_back(cur_op);
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exec_op(cur_op);
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}
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}
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void osd_messenger_t::handle_reply_hdr(osd_client_t *cl)
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{
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osd_op_t *cur_op = cl->read_op;
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auto req_it = cl->sent_ops.find(cur_op->req.hdr.id);
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if (req_it == cl->sent_ops.end())
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{
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// Command out of sync. Drop connection
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printf("Client %d command out of sync: id %lu\n", cl->peer_fd, cur_op->req.hdr.id);
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stop_client(cl->peer_fd);
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return;
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}
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osd_op_t *op = req_it->second;
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memcpy(op->reply.buf, cur_op->req.buf, OSD_PACKET_SIZE);
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if ((op->reply.hdr.opcode == OSD_OP_SECONDARY_READ || op->reply.hdr.opcode == OSD_OP_READ) &&
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op->reply.hdr.retval > 0)
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{
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// Read data. In this case we assume that the buffer is preallocated by the caller (!)
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assert(op->buf);
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cl->read_state = CL_READ_REPLY_DATA;
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cl->read_reply_id = op->req.hdr.id;
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cl->read_buf = op->buf;
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cl->read_remaining = op->reply.hdr.retval;
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}
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else if (op->reply.hdr.opcode == OSD_OP_SECONDARY_LIST && op->reply.hdr.retval > 0)
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{
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op->buf = memalign(MEM_ALIGNMENT, sizeof(obj_ver_id) * op->reply.hdr.retval);
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cl->read_state = CL_READ_REPLY_DATA;
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cl->read_reply_id = op->req.hdr.id;
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cl->read_buf = op->buf;
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cl->read_remaining = sizeof(obj_ver_id) * op->reply.hdr.retval;
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}
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else if (op->reply.hdr.opcode == OSD_OP_SHOW_CONFIG && op->reply.hdr.retval > 0)
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{
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op->buf = malloc(op->reply.hdr.retval);
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cl->read_state = CL_READ_REPLY_DATA;
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cl->read_reply_id = op->req.hdr.id;
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cl->read_buf = op->buf;
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cl->read_remaining = op->reply.hdr.retval;
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}
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else
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{
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delete cl->read_op;
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cl->read_state = 0;
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cl->read_op = NULL;
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cl->sent_ops.erase(req_it);
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// Measure subop latency
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timespec tv_end;
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clock_gettime(CLOCK_REALTIME, &tv_end);
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stats.subop_stat_count[op->req.hdr.opcode]++;
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if (!stats.subop_stat_count[op->req.hdr.opcode])
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{
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stats.subop_stat_count[op->req.hdr.opcode]++;
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stats.subop_stat_sum[op->req.hdr.opcode] = 0;
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}
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stats.subop_stat_sum[op->req.hdr.opcode] += (
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(tv_end.tv_sec - op->tv_begin.tv_sec)*1000000 +
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(tv_end.tv_nsec - op->tv_begin.tv_nsec)/1000
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);
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// Copy lambda to be unaffected by `delete op`
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std::function<void(osd_op_t*)>(op->callback)(op);
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}
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}
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