forked from vitalif/vitastor
562 lines
17 KiB
C++
562 lines
17 KiB
C++
#include <sys/socket.h>
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#include <sys/epoll.h>
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#include <sys/poll.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include "osd.h"
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#include "osd_http.h"
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const char* osd_op_names[] = {
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"",
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"read",
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"write",
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"sync",
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"stabilize",
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"rollback",
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"delete",
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"sync_stab_all",
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"list",
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"show_config",
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"primary_read",
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"primary_write",
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"primary_sync",
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"primary_delete",
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};
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osd_t::osd_t(blockstore_config_t & config, blockstore_t *bs, ring_loop_t *ringloop)
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{
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this->config = config;
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this->bs = bs;
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this->ringloop = ringloop;
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this->bs_block_size = bs->get_block_size();
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// FIXME: use bitmap granularity instead
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this->bs_disk_alignment = bs->get_disk_alignment();
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parse_config(config);
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epoll_fd = epoll_create(1);
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if (epoll_fd < 0)
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{
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throw std::runtime_error(std::string("epoll_create: ") + strerror(errno));
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}
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this->tfd = new timerfd_manager_t(ringloop);
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this->tfd->set_timer(print_stats_interval*1000, true, [this](int timer_id)
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{
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print_stats();
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});
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init_cluster();
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consumer.loop = [this]() { loop(); };
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ringloop->register_consumer(&consumer);
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}
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osd_t::~osd_t()
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{
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if (tfd)
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{
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delete tfd;
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tfd = NULL;
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}
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ringloop->unregister_consumer(&consumer);
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close(epoll_fd);
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close(listen_fd);
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}
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osd_op_t::~osd_op_t()
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{
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if (bs_op)
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{
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delete bs_op;
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}
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if (op_data)
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{
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free(op_data);
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}
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if (rmw_buf)
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{
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free(rmw_buf);
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}
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if (buf)
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{
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// Note: reusing osd_op_t WILL currently lead to memory leaks
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// So we don't reuse it, but free it every time
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free(buf);
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}
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}
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void osd_t::parse_config(blockstore_config_t & config)
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{
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int pos;
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// Initial startup configuration
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etcd_address = config["etcd_address"];
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etcd_prefix = config["etcd_prefix"];
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if (etcd_prefix == "")
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etcd_prefix = "/microceph";
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if ((pos = etcd_address.find('/')) >= 0)
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{
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etcd_api_path = etcd_address.substr(pos);
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etcd_address = etcd_address.substr(0, pos);
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}
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else if (config.find("etcd_version") != config.end())
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{
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int major, minor;
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if (sscanf(config["etcd_version"].c_str(), "%d.%d", &major, &minor) < 2)
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throw std::runtime_error("etcd_version should be in the form MAJOR.MINOR (for example, 3.2)");
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if (major < 3 || major == 3 && minor < 3)
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throw std::runtime_error("Your etcd is too old, minimum required version is 3.3");
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else if (major == 3 && minor == 3)
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etcd_api_path = "/v3beta";
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else
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etcd_api_path = "/v3";
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}
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else
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etcd_api_path = "/v3";
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etcd_report_interval = strtoull(config["etcd_report_interval"].c_str(), NULL, 10);
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if (etcd_report_interval <= 0)
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etcd_report_interval = 30;
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osd_num = strtoull(config["osd_num"].c_str(), NULL, 10);
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if (!osd_num)
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throw std::runtime_error("osd_num is required in the configuration");
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run_primary = config["run_primary"] != "false" && config["run_primary"] != "0" && config["run_primary"] != "no";
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// Cluster configuration
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bind_address = config["bind_address"];
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if (bind_address == "")
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bind_address = "0.0.0.0";
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bind_port = stoull_full(config["bind_port"]);
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if (bind_port <= 0 || bind_port > 65535)
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bind_port = 0;
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if (config["immediate_commit"] == "all")
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immediate_commit = IMMEDIATE_ALL;
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else if (config["immediate_commit"] == "small")
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immediate_commit = IMMEDIATE_SMALL;
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autosync_interval = strtoull(config["autosync_interval"].c_str(), NULL, 10);
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if (autosync_interval < 0 || autosync_interval > MAX_AUTOSYNC_INTERVAL)
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autosync_interval = DEFAULT_AUTOSYNC_INTERVAL;
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recovery_queue_depth = strtoull(config["recovery_queue_depth"].c_str(), NULL, 10);
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if (recovery_queue_depth < 1 || recovery_queue_depth > MAX_RECOVERY_QUEUE)
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recovery_queue_depth = DEFAULT_RECOVERY_QUEUE;
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if (config["readonly"] == "true" || config["readonly"] == "1" || config["readonly"] == "yes")
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readonly = true;
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print_stats_interval = strtoull(config["print_stats_interval"].c_str(), NULL, 10);
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if (!print_stats_interval)
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print_stats_interval = 3;
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peer_connect_interval = strtoull(config["peer_connect_interval"].c_str(), NULL, 10);
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if (!peer_connect_interval)
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peer_connect_interval = 5;
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peer_connect_timeout = strtoull(config["peer_connect_timeout"].c_str(), NULL, 10);
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if (!peer_connect_timeout)
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peer_connect_timeout = 5;
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log_level = strtoull(config["log_level"].c_str(), NULL, 10);
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}
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void osd_t::bind_socket()
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{
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listen_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (listen_fd < 0)
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{
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throw std::runtime_error(std::string("socket: ") + strerror(errno));
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}
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int enable = 1;
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setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable));
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sockaddr_in addr;
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int r;
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if ((r = inet_pton(AF_INET, bind_address.c_str(), &addr.sin_addr)) != 1)
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{
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close(listen_fd);
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throw std::runtime_error("bind address "+bind_address+(r == 0 ? " is not valid" : ": no ipv4 support"));
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(bind_port);
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if (bind(listen_fd, (sockaddr*)&addr, sizeof(addr)) < 0)
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{
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close(listen_fd);
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throw std::runtime_error(std::string("bind: ") + strerror(errno));
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}
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if (bind_port == 0)
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{
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socklen_t len = sizeof(addr);
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if (getsockname(listen_fd, (sockaddr *)&addr, &len) == -1)
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{
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close(listen_fd);
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throw std::runtime_error(std::string("getsockname: ") + strerror(errno));
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}
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listening_port = ntohs(addr.sin_port);
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}
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else
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{
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listening_port = bind_port;
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}
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if (listen(listen_fd, listen_backlog) < 0)
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{
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close(listen_fd);
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throw std::runtime_error(std::string("listen: ") + strerror(errno));
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}
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fcntl(listen_fd, F_SETFL, fcntl(listen_fd, F_GETFL, 0) | O_NONBLOCK);
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epoll_event ev;
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ev.data.fd = listen_fd;
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ev.events = EPOLLIN | EPOLLET;
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if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, listen_fd, &ev) < 0)
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{
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close(listen_fd);
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close(epoll_fd);
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throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
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}
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}
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bool osd_t::shutdown()
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{
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stopping = true;
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if (inflight_ops > 0)
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{
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return false;
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}
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return bs->is_safe_to_stop();
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}
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void osd_t::loop()
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{
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if (!wait_state)
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{
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handle_epoll_events();
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wait_state = 1;
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}
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handle_peers();
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read_requests();
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send_replies();
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ringloop->submit();
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}
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void osd_t::handle_epoll_events()
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{
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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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throw std::runtime_error("can't get SQE, will fall out of sync with EPOLLET");
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}
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ring_data_t *data = ((ring_data_t*)sqe->user_data);
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my_uring_prep_poll_add(sqe, epoll_fd, POLLIN);
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data->callback = [this](ring_data_t *data)
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{
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if (data->res < 0)
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{
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throw std::runtime_error(std::string("epoll failed: ") + strerror(-data->res));
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}
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handle_epoll_events();
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};
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ringloop->submit();
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int nfds;
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epoll_event events[MAX_EPOLL_EVENTS];
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restart:
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nfds = epoll_wait(epoll_fd, events, MAX_EPOLL_EVENTS, 0);
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for (int i = 0; i < nfds; i++)
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{
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if (events[i].data.fd == listen_fd)
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{
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// Accept new connections
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sockaddr_in addr;
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socklen_t peer_addr_size = sizeof(addr);
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int peer_fd;
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while ((peer_fd = accept(listen_fd, (sockaddr*)&addr, &peer_addr_size)) >= 0)
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{
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char peer_str[256];
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printf("[OSD %lu] new client %d: connection from %s port %d\n", this->osd_num, peer_fd,
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inet_ntop(AF_INET, &addr.sin_addr, peer_str, 256), ntohs(addr.sin_port));
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fcntl(peer_fd, F_SETFL, fcntl(listen_fd, F_GETFL, 0) | O_NONBLOCK);
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int one = 1;
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setsockopt(peer_fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
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clients[peer_fd] = {
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.peer_addr = addr,
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.peer_port = ntohs(addr.sin_port),
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.peer_fd = peer_fd,
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.peer_state = PEER_CONNECTED,
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.in_buf = malloc(receive_buffer_size),
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};
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// Add FD to epoll
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epoll_event ev;
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ev.data.fd = peer_fd;
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ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
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if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, peer_fd, &ev) < 0)
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{
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throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
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}
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// Try to accept next connection
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peer_addr_size = sizeof(addr);
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}
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if (peer_fd == -1 && errno != EAGAIN)
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{
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throw std::runtime_error(std::string("accept: ") + strerror(errno));
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}
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}
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else
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{
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auto cl_it = clients.find(events[i].data.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 (cl.peer_state == PEER_CONNECTING)
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{
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// Either OUT (connected) or HUP
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handle_connect_result(cl.peer_fd);
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}
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else if (events[i].events & EPOLLRDHUP)
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{
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// Stop client
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printf("[OSD %lu] client %d disconnected\n", this->osd_num, cl.peer_fd);
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stop_client(cl.peer_fd);
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}
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else
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{
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// Mark client as ready (i.e. some data is available)
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cl.read_ready++;
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if (cl.read_ready == 1)
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{
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read_ready_clients.push_back(cl.peer_fd);
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ringloop->wakeup();
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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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auto & cb = epoll_handlers[events[i].data.fd];
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cb(events[i].data.fd, events[i].events);
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}
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}
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}
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if (nfds == MAX_EPOLL_EVENTS)
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{
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goto restart;
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}
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}
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void osd_t::cancel_osd_ops(osd_client_t & cl)
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{
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for (auto p: cl.sent_ops)
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{
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cancel_op(p.second);
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}
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cl.sent_ops.clear();
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for (auto op: cl.outbox)
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{
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cancel_op(op);
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}
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cl.outbox.clear();
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if (cl.write_op)
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{
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cancel_op(cl.write_op);
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cl.write_op = NULL;
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}
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}
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void osd_t::cancel_op(osd_op_t *op)
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{
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if (op->op_type == OSD_OP_OUT)
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{
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op->reply.hdr.magic = SECONDARY_OSD_REPLY_MAGIC;
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op->reply.hdr.id = op->req.hdr.id;
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op->reply.hdr.opcode = op->req.hdr.opcode;
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op->reply.hdr.retval = -EPIPE;
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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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else
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{
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finish_op(op, -EPIPE);
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}
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}
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void osd_t::stop_client(int peer_fd)
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{
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auto it = clients.find(peer_fd);
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if (it == clients.end())
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{
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return;
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}
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osd_client_t cl = it->second;
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if (cl.peer_state == PEER_CONNECTED)
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{
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if (cl.osd_num)
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{
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// Reload configuration from etcd when the connection is dropped
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printf("[OSD %lu] Stopping client %d (OSD peer %lu)\n", osd_num, peer_fd, cl.osd_num);
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peer_states.erase(cl.osd_num);
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repeer_pgs(cl.osd_num);
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}
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else
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{
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printf("[OSD %lu] Stopping client %d (regular client)\n", osd_num, peer_fd);
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}
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}
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clients.erase(it);
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if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, peer_fd, NULL) < 0)
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{
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throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
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}
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if (cl.osd_num)
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{
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// Cancel outbound operations
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cancel_osd_ops(cl);
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osd_peer_fds.erase(cl.osd_num);
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peering_state |= OSD_CONNECTING_PEERS;
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}
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if (cl.read_op)
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{
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delete cl.read_op;
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}
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for (auto rit = read_ready_clients.begin(); rit != read_ready_clients.end(); rit++)
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{
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if (*rit == peer_fd)
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{
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read_ready_clients.erase(rit);
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break;
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}
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}
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for (auto wit = write_ready_clients.begin(); wit != write_ready_clients.end(); wit++)
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{
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if (*wit == peer_fd)
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{
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write_ready_clients.erase(wit);
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break;
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}
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}
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free(cl.in_buf);
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close(peer_fd);
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}
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void osd_t::exec_op(osd_op_t *cur_op)
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{
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clock_gettime(CLOCK_REALTIME, &cur_op->tv_begin);
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if (stopping)
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{
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// Throw operation away
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delete cur_op;
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return;
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}
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inflight_ops++;
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cur_op->send_list.push_back(cur_op->reply.buf, OSD_PACKET_SIZE);
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if (cur_op->req.hdr.magic != SECONDARY_OSD_OP_MAGIC ||
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cur_op->req.hdr.opcode < OSD_OP_MIN || cur_op->req.hdr.opcode > OSD_OP_MAX ||
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(cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ || cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE) &&
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(cur_op->req.sec_rw.len > OSD_RW_MAX || cur_op->req.sec_rw.len % bs_disk_alignment || cur_op->req.sec_rw.offset % bs_disk_alignment) ||
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(cur_op->req.hdr.opcode == OSD_OP_READ || cur_op->req.hdr.opcode == OSD_OP_WRITE || cur_op->req.hdr.opcode == OSD_OP_DELETE) &&
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(cur_op->req.rw.len > OSD_RW_MAX || cur_op->req.rw.len % bs_disk_alignment || cur_op->req.rw.offset % bs_disk_alignment))
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{
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// Bad command
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finish_op(cur_op, -EINVAL);
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return;
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}
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if (readonly &&
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cur_op->req.hdr.opcode != OSD_OP_SECONDARY_READ &&
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cur_op->req.hdr.opcode != OSD_OP_SECONDARY_LIST &&
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cur_op->req.hdr.opcode != OSD_OP_READ &&
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cur_op->req.hdr.opcode != OSD_OP_SHOW_CONFIG)
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{
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// Readonly mode
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finish_op(cur_op, -EROFS);
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return;
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}
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if (cur_op->req.hdr.opcode == OSD_OP_TEST_SYNC_STAB_ALL)
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{
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exec_sync_stab_all(cur_op);
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_SHOW_CONFIG)
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{
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exec_show_config(cur_op);
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}
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// FIXME: Do not handle operations immediately, manage some sort of a queue instead
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else if (cur_op->req.hdr.opcode == OSD_OP_READ)
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{
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continue_primary_read(cur_op);
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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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continue_primary_write(cur_op);
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}
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else if (cur_op->req.hdr.opcode == OSD_OP_SYNC)
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{
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continue_primary_sync(cur_op);
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|
}
|
|
else if (cur_op->req.hdr.opcode == OSD_OP_DELETE)
|
|
{
|
|
continue_primary_del(cur_op);
|
|
}
|
|
else
|
|
{
|
|
exec_secondary(cur_op);
|
|
}
|
|
}
|
|
|
|
void osd_t::reset_stats()
|
|
{
|
|
for (int p = 0; p < 2; p++)
|
|
{
|
|
for (int i = 0; i <= OSD_OP_MAX; i++)
|
|
{
|
|
if (op_stat_count[p][i] != 0)
|
|
{
|
|
op_stat_count[p][i] = 0;
|
|
op_stat_sum[p][i] = 0;
|
|
}
|
|
}
|
|
for (int i = 0; i <= OSD_OP_MAX; i++)
|
|
{
|
|
if (subop_stat_count[p][i] != 0)
|
|
{
|
|
subop_stat_count[p][i] = 0;
|
|
subop_stat_sum[p][i] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void osd_t::print_stats()
|
|
{
|
|
for (int i = 0; i <= OSD_OP_MAX; i++)
|
|
{
|
|
if (op_stat_count[0][i] != op_stat_count[1][i])
|
|
{
|
|
uint64_t avg = (op_stat_sum[0][i] - op_stat_sum[1][i])/(op_stat_count[0][i] - op_stat_count[1][i]);
|
|
uint64_t bw = (op_stat_bytes[0][i] - op_stat_bytes[1][i]) / print_stats_interval;
|
|
printf(
|
|
"avg latency for op %d (%s): %lu us, B/W: %.2f %s\n", i, osd_op_names[i], avg,
|
|
(bw > 1024*1024*1024 ? bw/1024.0/1024/1024 : (bw > 1024*1024 ? bw/1024.0/1024 : bw/1024.0)),
|
|
(bw > 1024*1024*1024 ? "GB/s" : (bw > 1024*1024 ? "MB/s" : "KB/s"))
|
|
);
|
|
op_stat_count[1][i] = op_stat_count[0][i];
|
|
op_stat_sum[1][i] = op_stat_sum[0][i];
|
|
op_stat_bytes[1][i] = op_stat_bytes[0][i];
|
|
}
|
|
}
|
|
for (int i = 0; i <= OSD_OP_MAX; i++)
|
|
{
|
|
if (subop_stat_count[0][i] != subop_stat_count[1][i])
|
|
{
|
|
uint64_t avg = (subop_stat_sum[0][i] - subop_stat_sum[1][i])/(subop_stat_count[0][i] - subop_stat_count[1][i]);
|
|
printf("avg latency for subop %d (%s): %ld us\n", i, osd_op_names[i], avg);
|
|
subop_stat_count[1][i] = subop_stat_count[0][i];
|
|
subop_stat_sum[1][i] = subop_stat_sum[0][i];
|
|
}
|
|
}
|
|
if (incomplete_objects > 0)
|
|
{
|
|
printf("%lu object(s) incomplete\n", incomplete_objects);
|
|
}
|
|
if (degraded_objects > 0)
|
|
{
|
|
printf("%lu object(s) degraded\n", degraded_objects);
|
|
}
|
|
if (misplaced_objects > 0)
|
|
{
|
|
printf("%lu object(s) misplaced\n", misplaced_objects);
|
|
}
|
|
}
|