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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <sys/stat.h>
#include <iostream>
#include <string>
using namespace std;
#include "common/config.h"
#include "common/errno.h"
#include "client/Client.h"
#include "client/fuse_ll.h"
#include "msg/Messenger.h"
#include "mon/MonClient.h"
#include "common/Timer.h"
#include "common/ceph_argparse.h"
#include "global/global_init.h"
#include "common/safe_io.h"
#ifndef DARWIN
#include <envz.h>
#endif // DARWIN
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
void usage()
{
cerr << "usage: ceph-fuse [-m mon-ip-addr:mon-port] <mount point>" << std::endl;
}
int main(int argc, const char **argv, const char *envp[]) {
int filer_flags = 0;
//cerr << "ceph-fuse starting " << myrank << "/" << world << std::endl;
vector<const char*> args;
argv_to_vec(argc, argv, args);
env_to_vec(args);
global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT, CODE_ENVIRONMENT_DAEMON,
CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS);
for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ) {
if (ceph_argparse_double_dash(args, i)) {
break;
} else if (ceph_argparse_flag(args, i, "--localize-reads", (char*)NULL)) {
cerr << "setting CEPH_OSD_FLAG_LOCALIZE_READS" << std::endl;
filer_flags |= CEPH_OSD_FLAG_LOCALIZE_READS;
} else {
++i;
}
}
// args for fuse
vec_to_argv(args, argc, argv);
// FUSE will chdir("/"); be ready.
g_ceph_context->_conf->set_val("chdir", "/");
g_ceph_context->_conf->apply_changes(NULL);
// check for 32-bit arch
if (sizeof(long) == 4) {
cerr << std::endl;
cerr << "WARNING: Ceph inode numbers are 64 bits wide, and FUSE on 32-bit kernels does" << std::endl;
cerr << " not cope well with that situation. Expect to crash shortly." << std::endl;
cerr << std::endl;
}
// get monmap
MonClient mc(g_ceph_context);
int ret = mc.build_initial_monmap();
if (ret == -EINVAL)
usage();
if (ret < 0)
return -1;
// start up network
Messenger *messenger = Messenger::create(g_ceph_context,
entity_name_t::CLIENT(), "client",
getpid());
Client *client = new Client(messenger, &mc);
if (filer_flags) {
client->set_filer_flags(filer_flags);
}
// we need to handle the forking ourselves.
int fd[2] = {0, 0}; // parent's, child's
pid_t childpid = 0;
bool restart_log = false;
if (g_conf->daemonize) {
int r = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
if (r < 0) {
cerr << "ceph-fuse[" << getpid() << "]: unable to create socketpair: " << cpp_strerror(errno) << std::endl;
exit(1);
}
g_ceph_context->_log->stop();
restart_log = true;
childpid = fork();
}
if (childpid == 0) {
common_init_finish(g_ceph_context);
//cout << "child, mounting" << std::endl;
::close(fd[0]);
if (restart_log)
g_ceph_context->_log->start();
cout << "ceph-fuse[" << getpid() << "]: starting ceph client" << std::endl;
int r = messenger->start();
if (r < 0) {
cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
goto out_messenger_start_failed;
}
// start client
r = client->init();
if (r < 0) {
cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
goto out_init_failed;
}
// start up fuse
// use my argc, argv (make sure you pass a mount point!)
r = client->mount(g_conf->client_mountpoint.c_str());
if (r < 0) {
cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
goto out_shutdown;
}
cerr << "ceph-fuse[" << getpid() << "]: starting fuse" << std::endl;
r = ceph_fuse_ll_main(client, argc, argv, fd[1]);
cerr << "ceph-fuse[" << getpid() << "]: fuse finished with error " << r << std::endl;
client->unmount();
//cout << "unmounted" << std::endl;
out_shutdown:
client->shutdown();
out_init_failed:
// wait for messenger to finish
messenger->wait();
out_messenger_start_failed:
delete client;
if (g_conf->daemonize) {
//cout << "child signalling parent with " << r << std::endl;
static int foo = 0;
foo += ::write(fd[1], &r, sizeof(r));
}
//cout << "child done" << std::endl;
return r;
} else {
// i am the parent
//cout << "parent, waiting for signal" << std::endl;
::close(fd[1]);
int r = -1;
int err = safe_read_exact(fd[0], &r, sizeof(r));
if (err == 0 && r == 0) {
// close stdout, etc.
//cout << "success" << std::endl;
::close(0);
::close(1);
::close(2);
} else if (err) {
cerr << "ceph-fuse[" << getpid() << "]: mount failed: " << cpp_strerror(-err) << std::endl;
} else {
cerr << "ceph-fuse[" << getpid() << "]: mount failed: " << cpp_strerror(-r) << std::endl;
}
return r;
}
}
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