243 lines
5.9 KiB
C++
243 lines
5.9 KiB
C++
#include <netinet/tcp.h>
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#include <sys/epoll.h>
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#include "osd.h"
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int get_port(std::string & host)
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{
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int port = 0;
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int pos = 0;
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if ((pos = host.find(':')) >= 0)
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{
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port = strtoull(host.c_str() + pos + 1, NULL, 10);
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if (port >= 0x10000)
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{
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port = 0;
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}
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host = host.substr(0, pos);
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}
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return port;
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}
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struct http_co_t
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{
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osd_t *osd;
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std::string host;
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std::string request;
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std::vector<char> response;
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int st = 0;
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int peer_fd = -1;
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int epoll_events = 0;
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int code = 0;
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int sent = 0, received = 0;
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iovec iov;
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msghdr msg = { 0 };
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int cqe_res = 0;
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std::function<void(int, std::string)> callback;
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std::function<void(int, int)> epoll_handler;
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~http_co_t();
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void resume();
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};
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void osd_t::http_request(std::string host, std::string request, std::function<void(int, std::string)> callback)
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{
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http_co_t *handler = new http_co_t();
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handler->osd = this;
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handler->host = host;
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handler->request = request;
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handler->callback = callback;
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handler->epoll_handler = [this, handler](int peer_fd, int epoll_events)
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{
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handler->epoll_events |= epoll_events;
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handler->resume();
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};
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handler->resume();
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}
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http_co_t::~http_co_t()
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{
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response.resize(response.size()+1);
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response[response.size()-1] = 0;
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callback(code, std::string(response.data(), response.size()));
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if (peer_fd >= 0)
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{
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osd->epoll_handlers.erase(peer_fd);
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epoll_ctl(osd->epoll_fd, EPOLL_CTL_DEL, peer_fd, NULL);
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close(peer_fd);
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peer_fd = -1;
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}
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}
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void http_co_t::resume()
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{
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if (st == 0)
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{
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int port = get_port(host);
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struct sockaddr_in addr;
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int r;
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if ((r = inet_pton(AF_INET, host.c_str(), &addr.sin_addr)) != 1)
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{
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delete this;
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return;
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port ? port : 80);
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peer_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (peer_fd < 0)
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{
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delete this;
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return;
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}
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fcntl(peer_fd, F_SETFL, fcntl(peer_fd, F_GETFL, 0) | O_NONBLOCK);
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r = connect(peer_fd, (sockaddr*)&addr, sizeof(addr));
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if (r < 0 && errno != EINPROGRESS)
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{
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delete this;
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return;
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}
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osd->epoll_handlers[peer_fd] = epoll_handler;
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// Add FD to epoll (EPOLLOUT for tracking connect() result)
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epoll_event ev;
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ev.data.fd = peer_fd;
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ev.events = EPOLLOUT | EPOLLIN | EPOLLRDHUP | EPOLLET;
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if (epoll_ctl(osd->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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st = 1;
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return;
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}
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if (st == 1)
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{
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if (epoll_events & EPOLLOUT)
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{
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int result = 0;
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socklen_t result_len = sizeof(result);
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if (getsockopt(peer_fd, SOL_SOCKET, SO_ERROR, &result, &result_len) < 0)
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{
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result = errno;
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}
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if (result != 0)
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{
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delete this;
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return;
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}
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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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// Disable EPOLLOUT on this fd
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epoll_event ev;
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ev.data.fd = peer_fd;
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ev.events = EPOLLIN | EPOLLRDHUP | EPOLLET;
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if (epoll_ctl(osd->epoll_fd, EPOLL_CTL_MOD, 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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st = 2;
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epoll_events = 0;
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resume();
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return;
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}
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else if (epoll_events & EPOLLRDHUP)
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{
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delete this;
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return;
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}
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else
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{
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return;
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}
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}
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// Write data
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if (st == 2)
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{
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io_uring_sqe *sqe = osd->ringloop->get_sqe();
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if (!sqe)
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return;
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ring_data_t* data = ((ring_data_t*)sqe->user_data);
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iov = (iovec){ .iov_base = (void*)(request.c_str()+sent), .iov_len = request.size()-sent };
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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data->callback = [this](ring_data_t *data)
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{
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st = 4;
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cqe_res = data->res;
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resume();
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};
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my_uring_prep_sendmsg(sqe, peer_fd, &msg, 0);
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st = 3;
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return;
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}
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if (st == 3)
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{
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return;
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}
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if (st == 4)
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{
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if (cqe_res < 0 && cqe_res != -EAGAIN)
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{
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delete this;
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return;
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}
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sent += cqe_res;
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if (sent < request.size())
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st = 2;
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else
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st = 5;
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resume();
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return;
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}
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// Read response
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if (st == 5)
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{
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if (epoll_events & EPOLLIN)
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{
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response.resize(received + 9000);
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io_uring_sqe *sqe = osd->ringloop->get_sqe();
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if (!sqe)
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return;
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ring_data_t* data = ((ring_data_t*)sqe->user_data);
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iov = { .iov_base = response.data()+received, .iov_len = 9000 };
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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data->callback = [this](ring_data_t *data)
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{
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st = 7;
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cqe_res = data->res;
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resume();
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};
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my_uring_prep_recvmsg(sqe, peer_fd, &msg, 0);
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st = 6;
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epoll_events = 0;
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}
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else if (epoll_events & EPOLLRDHUP)
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{
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delete this;
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return;
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}
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}
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if (st == 6)
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{
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return;
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}
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if (st == 7)
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{
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if (cqe_res < 0 && cqe_res != -EAGAIN)
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{
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delete this;
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return;
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}
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received += cqe_res;
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st = 5;
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resume();
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return;
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}
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}
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/*void osd_t::get_pgs()
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{
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//consul_address
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}*/
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