mirror of
https://github.com/ceph/ceph
synced 2024-12-28 22:43:29 +00:00
54531e3691
return will never be called,because usage will call exit(1) Signed-off-by: huanwen ren <ren.huanwen@zte.com.cn>
317 lines
9.0 KiB
C++
317 lines
9.0 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <iostream>
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#include <string>
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using namespace std;
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#include "common/config.h"
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#include "common/errno.h"
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#include "client/Client.h"
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#include "client/fuse_ll.h"
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#include "msg/Messenger.h"
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#include "mon/MonClient.h"
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#include "common/Timer.h"
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#include "common/ceph_argparse.h"
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#if defined(__linux__)
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#include "common/linux_version.h"
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#endif
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#include "global/global_init.h"
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#include "global/signal_handler.h"
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#include "common/safe_io.h"
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#include <sys/types.h>
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#include <fcntl.h>
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#include <fuse.h>
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static void fuse_usage()
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{
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const char **argv = (const char **) malloc((2) * sizeof(char *));
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argv[0] = "ceph-fuse";
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argv[1] = "-h";
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struct fuse_args args = FUSE_ARGS_INIT(2, (char**)argv);
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if (fuse_parse_cmdline(&args, NULL, NULL, NULL) == -1) {
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derr << "fuse_parse_cmdline failed." << dendl;
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fuse_opt_free_args(&args);
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}
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assert(args.allocated); // Checking fuse has realloc'd args so we can free newargv
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free(argv);
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}
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void usage()
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{
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cout <<
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"usage: ceph-fuse [-m mon-ip-addr:mon-port] <mount point> [OPTIONS]\n"
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" --client_mountpoint/-r <root_directory>\n"
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" use root_directory as the mounted root, rather than the full Ceph tree.\n"
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"\n";
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fuse_usage();
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generic_client_usage();
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}
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int main(int argc, const char **argv, const char *envp[]) {
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int filer_flags = 0;
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//cerr << "ceph-fuse starting " << myrank << "/" << world << std::endl;
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vector<const char*> args;
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argv_to_vec(argc, argv, args);
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if (args.empty()) {
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usage();
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}
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env_to_vec(args);
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global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT, CODE_ENVIRONMENT_DAEMON,
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CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS);
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for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ) {
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if (ceph_argparse_double_dash(args, i)) {
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break;
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} else if (ceph_argparse_flag(args, i, "--localize-reads", (char*)NULL)) {
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cerr << "setting CEPH_OSD_FLAG_LOCALIZE_READS" << std::endl;
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filer_flags |= CEPH_OSD_FLAG_LOCALIZE_READS;
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} else if (ceph_argparse_flag(args, i, "-h", "--help", (char*)NULL)) {
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usage();
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assert(0);
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} else {
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++i;
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}
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}
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// args for fuse
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const char **newargv;
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int newargc;
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vec_to_argv(argv[0], args, &newargc, &newargv);
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// FUSE will chdir("/"); be ready.
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g_ceph_context->_conf->set_val("chdir", "/");
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g_ceph_context->_conf->apply_changes(NULL);
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// check for 32-bit arch
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if (sizeof(long) == 4) {
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cerr << std::endl;
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cerr << "WARNING: Ceph inode numbers are 64 bits wide, and FUSE on 32-bit kernels does" << std::endl;
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cerr << " not cope well with that situation. Expect to crash shortly." << std::endl;
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cerr << std::endl;
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}
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// we need to handle the forking ourselves.
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int fd[2] = {0, 0}; // parent's, child's
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pid_t childpid = 0;
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int tester_r = 0;
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void *tester_rp = NULL;
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bool restart_log = false;
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if (g_conf->daemonize) {
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int r = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
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if (r < 0) {
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cerr << "ceph-fuse[" << getpid() << "]: unable to create socketpair: " << cpp_strerror(errno) << std::endl;
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exit(1);
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}
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g_ceph_context->_log->stop();
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restart_log = true;
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childpid = fork();
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}
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if (childpid == 0) {
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if (restart_log)
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g_ceph_context->_log->start();
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common_init_finish(g_ceph_context);
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//cout << "child, mounting" << std::endl;
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::close(fd[0]);
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class RemountTest : public Thread {
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public:
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CephFuse *cfuse;
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Client *client;
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RemountTest() : cfuse(NULL), client(NULL) {}
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void init(CephFuse *cf, Client *cl) {
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cfuse = cf;
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client = cl;
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}
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virtual ~RemountTest() {}
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virtual void *entry() {
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#if defined(__linux__)
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int ver = get_linux_version();
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assert(ver != 0);
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bool can_invalidate_dentries = g_conf->client_try_dentry_invalidate &&
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ver < KERNEL_VERSION(3, 18, 0);
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int tr = client->test_dentry_handling(can_invalidate_dentries);
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if (tr != 0) {
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cerr << "ceph-fuse[" << getpid()
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<< "]: fuse failed dentry invalidate/remount test with error "
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<< cpp_strerror(tr) << ", stopping" << std::endl;
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char buf[5050];
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string mountpoint = cfuse->get_mount_point();
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snprintf(buf, 5049, "fusermount -u -z %s", mountpoint.c_str());
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int umount_r = system(buf);
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if (umount_r) {
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if (umount_r != -1) {
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if (WIFEXITED(umount_r)) {
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umount_r = WEXITSTATUS(umount_r);
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cerr << "got error " << umount_r
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<< " when unmounting Ceph on failed remount test!" << std::endl;
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} else {
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cerr << "attempt to umount on failed remount test failed (on a signal?)" << std::endl;
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}
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} else {
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cerr << "system() invocation failed during remount test" << std::endl;
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}
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}
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}
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return reinterpret_cast<void*>(tr);
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#else
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return reinterpret_cast<void*>(0);
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#endif
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}
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} tester;
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// get monmap
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Messenger *messenger = NULL;
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Client *client;
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CephFuse *cfuse;
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MonClient *mc = new MonClient(g_ceph_context);
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int r = mc->build_initial_monmap();
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if (r == -EINVAL)
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usage();
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if (r < 0)
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goto out_mc_start_failed;
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// start up network
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messenger = Messenger::create_client_messenger(g_ceph_context, "client");
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messenger->set_default_policy(Messenger::Policy::lossy_client(0, 0));
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messenger->set_policy(entity_name_t::TYPE_MDS,
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Messenger::Policy::lossless_client(0, 0));
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client = new Client(messenger, mc);
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if (filer_flags) {
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client->set_filer_flags(filer_flags);
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}
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cfuse = new CephFuse(client, fd[1]);
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r = cfuse->init(newargc, newargv);
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if (r != 0) {
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cerr << "ceph-fuse[" << getpid() << "]: fuse failed to initialize" << std::endl;
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goto out_messenger_start_failed;
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}
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cout << "ceph-fuse[" << getpid() << "]: starting ceph client" << std::endl;
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r = messenger->start();
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if (r < 0) {
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cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
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goto out_messenger_start_failed;
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}
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init_async_signal_handler();
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register_async_signal_handler(SIGHUP, sighup_handler);
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// start client
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r = client->init();
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if (r < 0) {
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cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
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goto out_init_failed;
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}
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client->update_metadata("mount_point", cfuse->get_mount_point());
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// start up fuse
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// use my argc, argv (make sure you pass a mount point!)
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r = client->mount(g_conf->client_mountpoint.c_str(), g_ceph_context->_conf->fuse_require_active_mds);
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if (r < 0) {
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if (r == CEPH_FUSE_NO_MDS_UP)
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cerr << "ceph-fuse[" << getpid() << "]: probably no MDS server is up?" << std::endl;
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cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
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goto out_shutdown;
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}
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r = cfuse->start();
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if (r != 0) {
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cerr << "ceph-fuse[" << getpid() << "]: fuse failed to start" << std::endl;
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goto out_client_unmount;
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}
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cerr << "ceph-fuse[" << getpid() << "]: starting fuse" << std::endl;
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tester.init(cfuse, client);
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tester.create("tester");
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r = cfuse->loop();
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tester.join(&tester_rp);
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tester_r = static_cast<int>(reinterpret_cast<uint64_t>(tester_rp));
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cerr << "ceph-fuse[" << getpid() << "]: fuse finished with error " << r
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<< " and tester_r " << tester_r <<std::endl;
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out_client_unmount:
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client->unmount();
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cfuse->finalize();
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out_shutdown:
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client->shutdown();
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out_init_failed:
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unregister_async_signal_handler(SIGHUP, sighup_handler);
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shutdown_async_signal_handler();
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// wait for messenger to finish
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messenger->shutdown();
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messenger->wait();
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out_messenger_start_failed:
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delete cfuse;
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delete client;
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delete messenger;
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out_mc_start_failed:
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if (g_conf->daemonize) {
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//cout << "child signalling parent with " << r << std::endl;
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static int foo = 0;
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foo += ::write(fd[1], &r, sizeof(r));
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}
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g_ceph_context->put();
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free(newargv);
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delete mc;
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//cout << "child done" << std::endl;
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return r;
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} else {
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// i am the parent
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//cout << "parent, waiting for signal" << std::endl;
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::close(fd[1]);
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int r = -1;
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int err = safe_read_exact(fd[0], &r, sizeof(r));
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if (err == 0 && r == 0) {
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// close stdout, etc.
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//cout << "success" << std::endl;
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::close(0);
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::close(1);
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::close(2);
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} else if (err) {
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cerr << "ceph-fuse[" << getpid() << "]: mount failed: " << cpp_strerror(-err) << std::endl;
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} else {
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cerr << "ceph-fuse[" << getpid() << "]: mount failed: " << cpp_strerror(-r) << std::endl;
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}
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return r;
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}
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}
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