445 lines
14 KiB
C++
445 lines
14 KiB
C++
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
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#define _XOPEN_SOURCE
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#include <limits.h>
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#include <sys/epoll.h>
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#include "messenger.h"
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void osd_messenger_t::outbox_push(osd_op_t *cur_op)
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{
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assert(cur_op->client_id);
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auto cl_it = clients.find(cur_op->client_id);
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if (cl_it == clients.end() || cl_it->second->peer_state == PEER_STOPPED)
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{
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delete cur_op;
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return;
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}
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osd_client_t *cl = cl_it->second;
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if (cur_op->op_type == OSD_OP_OUT)
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{
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clock_gettime(CLOCK_REALTIME, &cur_op->tv_begin);
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cur_op->req.hdr.id = ++cl->send_op_id;
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cl->sent_ops[cur_op->req.hdr.id] = cur_op;
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}
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else
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{
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// Remove the operation from received op list
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bool found = false;
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for (auto it = cl->received_ops.begin(); it != cl->received_ops.end(); it++)
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{
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if (*it == cur_op)
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{
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found = true;
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cl->received_ops.erase(it, it+1);
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break;
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}
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}
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// Can't be not found because client IDs are unique
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assert(found);
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measure_exec(cur_op);
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}
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cl->write_ops.push_back(cur_op);
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#ifdef WITH_RDMA
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if (cl->peer_state == PEER_RDMA)
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{
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try_send_rdma(cl);
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return;
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}
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#endif
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if (!ringloop)
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{
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// FIXME: It's worse because it doesn't allow batching
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while (cl->write_op || cl->write_ops.size())
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{
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try_send(cl);
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}
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}
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else
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{
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if ((cl->write_msg.msg_iovlen > 0 || !try_send(cl)) && (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->client_id);
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}
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ringloop->wakeup();
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}
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}
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void osd_messenger_t::inc_op_stats(osd_op_stats_t & stats, uint64_t opcode, timespec & tv_begin, timespec & tv_end, uint64_t len)
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{
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uint64_t usecs = (
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(tv_end.tv_sec - tv_begin.tv_sec)*1000000 +
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(tv_end.tv_nsec - tv_begin.tv_nsec)/1000
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);
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stats.op_stat_count[opcode]++;
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if (!stats.op_stat_count[opcode])
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{
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stats.op_stat_count[opcode] = 1;
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stats.op_stat_sum[opcode] = 0;
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stats.op_stat_bytes[opcode] = 0;
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}
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stats.op_stat_sum[opcode] += usecs;
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stats.op_stat_bytes[opcode] += len;
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}
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void osd_messenger_t::measure_exec(osd_op_t *cur_op)
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{
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// Measure execution latency
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if (cur_op->req.hdr.opcode > OSD_OP_MAX)
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{
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return;
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}
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if (!cur_op->tv_end.tv_sec)
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{
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clock_gettime(CLOCK_REALTIME, &cur_op->tv_end);
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}
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uint64_t len = 0;
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if (cur_op->req.hdr.opcode == OSD_OP_READ ||
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cur_op->req.hdr.opcode == OSD_OP_WRITE ||
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cur_op->req.hdr.opcode == OSD_OP_SCRUB)
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{
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// req.rw.len is internally set to the full object size for scrubs
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len = cur_op->req.rw.len;
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
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cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE ||
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cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE)
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{
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len = cur_op->req.sec_rw.len;
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}
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inc_op_stats(stats, cur_op->req.hdr.opcode, cur_op->tv_begin, cur_op->tv_end, len);
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if (cur_op->is_recovery_related())
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{
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inc_op_stats(recovery_stats, cur_op->req.hdr.opcode, cur_op->tv_begin, cur_op->tv_end, len);
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}
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}
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bool osd_messenger_t::try_send(osd_client_t *cl)
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{
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if (!cl->write_op && !cl->write_ops.size() || cl->write_msg.msg_iovlen > 0 || cl->peer_state == PEER_STOPPED || cl->peer_fd < 0)
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{
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return true;
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}
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assert(cl->peer_state != PEER_RDMA);
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while ((cl->write_op || cl->write_ops.size()) && cl->send_list.size() < IOV_MAX)
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{
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if (!cl->write_op)
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{
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cl->write_op = cl->write_ops.front();
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cl->write_ops.pop_front();
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}
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osd_op_t *op = cl->write_op;
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op_get_write_buffers(cl, cl->send_list);
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if (!cl->write_op && op->op_type == OSD_OP_IN)
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{
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cl->send_free_ops.push_back(op);
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}
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}
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if (ringloop && !use_sync_send_recv)
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{
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auto iothread = iothreads.size() ? iothreads[cl->peer_fd % iothreads.size()] : NULL;
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io_uring_sqe sqe_local;
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ring_data_t data_local;
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io_uring_sqe* sqe = (iothread ? &sqe_local : ringloop->get_sqe());
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if (iothread)
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{
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sqe_local = { .user_data = (uint64_t)&data_local };
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data_local = {};
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}
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if (!sqe)
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{
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return false;
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}
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cl->send_list_size = 0;
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for (auto & iov: cl->send_list)
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{
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cl->send_list_size += iov.iov_len;
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}
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cl->write_msg.msg_iov = cl->send_list.data();
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cl->write_msg.msg_iovlen = cl->send_list.size() < IOV_MAX ? cl->send_list.size() : IOV_MAX;
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cl->refs++;
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ring_data_t* data = ((ring_data_t*)sqe->user_data);
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data->callback = [this, cl](ring_data_t *data) { handle_send(data->res, data->prev, data->more, cl); };
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bool use_zc = has_sendmsg_zc && min_zerocopy_send_size >= 0;
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if (use_zc && min_zerocopy_send_size > 0 &&
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cl->send_list_size/cl->write_msg.msg_iovlen < min_zerocopy_send_size)
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{
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use_zc = false;
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}
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if (use_zc)
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{
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io_uring_prep_sendmsg_zc(sqe, cl->peer_fd, &cl->write_msg, MSG_WAITALL);
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}
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else
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{
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io_uring_prep_sendmsg(sqe, cl->peer_fd, &cl->write_msg, MSG_WAITALL);
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}
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if (iothread)
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{
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iothread->add_sqe(sqe_local);
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}
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}
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else
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{
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cl->write_msg.msg_iov = cl->send_list.data();
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cl->write_msg.msg_iovlen = cl->send_list.size() < IOV_MAX ? cl->send_list.size() : IOV_MAX;
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cl->refs++;
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int result = sendmsg(cl->peer_fd, &cl->write_msg, MSG_NOSIGNAL);
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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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// like set_immediate
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tfd->set_timer_us(0, false, [this, result, cl](int){ handle_send(result, false, false, cl); });
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}
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return true;
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}
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void osd_messenger_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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uint64_t client_id = write_ready_clients[i];
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auto cl_it = clients.find(client_id);
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if (cl_it != clients.end() && cl_it->second->peer_state != PEER_RDMA && !try_send(cl_it->second))
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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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}
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write_ready_clients.clear();
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}
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void osd_messenger_t::handle_send(int result, bool prev, bool more, osd_client_t *cl)
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{
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if (!prev)
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{
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cl->write_msg.msg_iovlen = 0;
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cl->send_list.clear();
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}
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if (!more)
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{
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cl->refs--;
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}
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if (cl->peer_state == PEER_STOPPED)
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{
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if (cl->refs <= 0)
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{
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destroy_client(cl);
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}
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return;
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}
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if (result < 0 && result != -EAGAIN && result != -EINTR)
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{
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// this is a client socket, so don't panic. just disconnect it
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fprintf(stderr, "Client %ju socket write error: %d (%s). Disconnecting client\n", cl->client_id, -result, strerror(-result));
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stop_client(cl->client_id);
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return;
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}
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if (result >= 0)
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{
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if (prev)
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{
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// Second notification - only free a batch of postponed ops
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int i = 0;
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for (; i < cl->zc_free_list.size() && cl->zc_free_list[i]; i++)
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delete cl->zc_free_list[i];
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if (i > 0)
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cl->zc_free_list.erase(cl->zc_free_list.begin(), cl->zc_free_list.begin()+i+1);
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return;
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}
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if (cl->send_list_size > result)
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{
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fprintf(stderr, "Client %ju socket write error: expected to send "
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"%zu bytes with MSG_WAITALL but sent %u. Disconnecting client\n", cl->client_id, cl->send_list_size, result);
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stop_client(cl->client_id);
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return;
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}
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for (auto op: cl->send_free_ops)
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{
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if (more)
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cl->zc_free_list.push_back(op);
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else
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delete op;
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}
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if (more)
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cl->zc_free_list.push_back(NULL); // end marker
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cl->send_free_ops.clear();
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cl->write_state = cl->write_op || cl->write_ops.size() ? CL_WRITE_READY : 0;
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#ifdef WITH_RDMA
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if (cl->rdma_conn && !cl->write_op && !cl->write_ops.size() && cl->peer_state == PEER_RDMA_CONNECTING)
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{
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// FIXME: Ignore pings during RDMA state transition
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if (log_level > 0)
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{
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fprintf(stderr, "Successfully connected with client %ju using RDMA\n", cl->client_id);
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}
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cl->peer_state = PEER_RDMA;
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// Add the initial receive request
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init_recv_rdma(cl);
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}
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#endif
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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(cl->client_id);
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}
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}
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static inline bool op_write_headers(osd_op_t *op, std::function<bool(uint8_t*, size_t)> op_write_buf)
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{
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// Header
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if (!op_write_buf((op->op_type == OSD_OP_IN ? op->reply.buf : op->req.buf), OSD_PACKET_SIZE))
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return false;
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// Bitmap
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if (op->op_type == OSD_OP_IN &&
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op->req.hdr.opcode == OSD_OP_SEC_READ &&
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op->reply.sec_rw.attr_len > 0)
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{
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if (!op_write_buf((uint8_t*)op->bitmap, op->reply.sec_rw.attr_len))
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return false;
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}
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else if (op->op_type == OSD_OP_OUT &&
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(op->req.hdr.opcode == OSD_OP_SEC_WRITE || op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE) &&
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op->req.sec_rw.attr_len > 0)
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{
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if (!op_write_buf((uint8_t*)op->bitmap, op->req.sec_rw.attr_len))
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return false;
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}
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if (op->req.hdr.opcode == OSD_OP_SEC_READ_BMP)
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{
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if (op->op_type == OSD_OP_IN && op->reply.hdr.retval > 0)
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{
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if (!op_write_buf((uint8_t*)op->buf, (size_t)op->reply.hdr.retval))
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return false;
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}
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else if (op->op_type == OSD_OP_OUT && op->req.sec_read_bmp.len > 0)
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{
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if (!op_write_buf((uint8_t*)op->buf, (size_t)op->req.sec_read_bmp.len))
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return false;
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}
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}
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return true;
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}
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static inline bool op_has_data(osd_op_t *op)
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{
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return (op->op_type == OSD_OP_IN
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? (op->req.hdr.opcode == OSD_OP_READ ||
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op->req.hdr.opcode == OSD_OP_SEC_READ ||
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op->req.hdr.opcode == OSD_OP_SEC_LIST ||
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op->req.hdr.opcode == OSD_OP_SHOW_CONFIG ||
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op->req.hdr.opcode == OSD_OP_DESCRIBE)
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: (op->req.hdr.opcode == OSD_OP_WRITE ||
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op->req.hdr.opcode == OSD_OP_SEC_WRITE ||
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op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE ||
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op->req.hdr.opcode == OSD_OP_SEC_STABILIZE ||
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op->req.hdr.opcode == OSD_OP_SEC_ROLLBACK ||
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op->req.hdr.opcode == OSD_OP_SHOW_CONFIG)) && op->iov.count > 0;
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}
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size_t osd_messenger_t::op_copy_to(osd_client_t *cl, uint8_t *dst, size_t dst_len)
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{
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size_t done = 0;
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size_t from = cl->write_op_pos;
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auto op_write_buf = [&](uint8_t *src, size_t src_len)
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{
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if (from < src_len)
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{
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size_t n = src_len-from;
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if (n > dst_len-done)
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n = dst_len-done;
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memcpy(dst+done, src+from, n);
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done += n;
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cl->write_op_pos += n;
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from += n;
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if (from < src_len)
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return false;
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from = 0;
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}
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else
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from -= src_len;
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return true;
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};
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if (!op_write_headers(cl->write_op, op_write_buf))
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{
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return done;
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}
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// Operation data
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if (op_has_data(cl->write_op))
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{
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if (cl->write_op->enc)
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{
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if (!op_encrypted_copy_data_to(cl, dst, dst_len, from, done))
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{
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return done;
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}
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}
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else
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{
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for (int i = 0; i < cl->write_op->iov.count; i++)
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{
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if (!op_write_buf((uint8_t*)cl->write_op->iov.buf[i].iov_base, cl->write_op->iov.buf[i].iov_len))
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return done;
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}
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}
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}
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cl->write_op = NULL;
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cl->write_op_pos = 0;
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return done;
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}
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void osd_messenger_t::op_get_write_buffers(osd_client_t *cl, std::vector<iovec> & lst)
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{
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size_t from = cl->write_op_pos;
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auto op_write_buf = [&](uint8_t *src, size_t src_len)
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{
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if (lst.size() >= IOV_MAX)
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return false;
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if (from < src_len)
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{
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lst.push_back((iovec){ .iov_base = src+from, .iov_len = src_len-from });
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cl->write_op_pos += src_len-from;
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from = 0;
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}
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else
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from -= src_len;
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return true;
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};
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if (!op_write_headers(cl->write_op, op_write_buf))
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{
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return;
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}
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// Operation data
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if (op_has_data(cl->write_op))
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{
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if (cl->write_op->enc)
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{
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if (lst.size() >= IOV_MAX)
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return;
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// No way except to allocate a temporary buffer and encrypt data to it
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assert(cl->write_op->req.hdr.opcode == OSD_OP_WRITE);
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size_t remsize = cl->write_op->req.rw.len - from + (from % 16);
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assert(remsize > 0);
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assert(!cl->write_op->enc_buf);
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cl->write_op->enc_buf = (uint8_t*)malloc_or_die(remsize);
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size_t done = 0;
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bool end = op_encrypted_copy_data_to(cl, cl->write_op->enc_buf, remsize, from, done);
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assert(end);
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lst.push_back((iovec){ .iov_base = cl->write_op->enc_buf, .iov_len = remsize });
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}
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else
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{
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for (int i = 0; i < cl->write_op->iov.count; i++)
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{
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if (!op_write_buf((uint8_t*)cl->write_op->iov.buf[i].iov_base, cl->write_op->iov.buf[i].iov_len))
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return;
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}
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}
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}
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cl->write_op = NULL;
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cl->write_op_pos = 0;
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}
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