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ceph/src/ceph_fuse.cc
Adam C. Emerson b9182564c7 dout: Use dout_context 
As a transition for g_ceph_context removal, make all dout macros depends
on a local macro.

Signed-off-by: Adam C. Emerson <aemerson@redhat.com>
2016-12-22 13:55:37 -05:00

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8.3 KiB
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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 <sys/utsname.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"
#if defined(__linux__)
#include "common/linux_version.h"
#endif
#include "global/global_init.h"
#include "global/signal_handler.h"
#include "common/Preforker.h"
#include "common/safe_io.h"
#include <sys/types.h>
#include <fcntl.h>
#include <fuse.h>
#define dout_context g_ceph_context
static void fuse_usage()
{
const char **argv = (const char **) malloc((2) * sizeof(char *));
argv[0] = "ceph-fuse";
argv[1] = "-h";
struct fuse_args args = FUSE_ARGS_INIT(2, (char**)argv);
if (fuse_parse_cmdline(&args, NULL, NULL, NULL) == -1) {
derr << "fuse_parse_cmdline failed." << dendl;
fuse_opt_free_args(&args);
}
assert(args.allocated); // Checking fuse has realloc'd args so we can free newargv
free(argv);
}
void usage()
{
cout <<
"usage: ceph-fuse [-m mon-ip-addr:mon-port] <mount point> [OPTIONS]\n"
" --client_mountpoint/-r <root_directory>\n"
" use root_directory as the mounted root, rather than the full Ceph tree.\n"
"\n";
fuse_usage();
generic_client_usage();
}
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);
if (args.empty()) {
usage();
}
env_to_vec(args);
auto cct = 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 if (ceph_argparse_flag(args, i, "-h", "--help", (char*)NULL)) {
usage();
ceph_abort();
} else {
++i;
}
}
// args for fuse
const char **newargv;
int newargc;
vec_to_argv(argv[0], args, &newargc, &newargv);
// 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;
}
global_init_prefork(g_ceph_context);
Preforker forker;
if (g_conf->daemonize) {
string err;
if (forker.prefork(err)) {
cerr << "ceph-fuse[" << err << std::endl;
return 1;
}
global_init_postfork_start(cct.get());
}
if (forker.is_parent()) {
string err;
int r = forker.parent_wait(err);
if (r) {
cerr << "ceph-fuse" << err << std::endl;
}
return r;
}
if (forker.is_child()) {
common_init_finish(g_ceph_context);
//cout << "child, mounting" << std::endl;
class RemountTest : public Thread {
public:
CephFuse *cfuse;
Client *client;
RemountTest() : cfuse(NULL), client(NULL) {}
void init(CephFuse *cf, Client *cl) {
cfuse = cf;
client = cl;
}
virtual ~RemountTest() {}
virtual void *entry() {
#if defined(__linux__)
int ver = get_linux_version();
assert(ver != 0);
bool can_invalidate_dentries = g_conf->client_try_dentry_invalidate &&
ver < KERNEL_VERSION(3, 18, 0);
int tr = client->test_dentry_handling(can_invalidate_dentries);
if (tr != 0) {
cerr << "ceph-fuse[" << getpid()
<< "]: fuse failed dentry invalidate/remount test with error "
<< cpp_strerror(tr) << ", stopping" << std::endl;
char buf[5050];
string mountpoint = cfuse->get_mount_point();
snprintf(buf, sizeof(buf), "fusermount -u -z %s", mountpoint.c_str());
int umount_r = system(buf);
if (umount_r) {
if (umount_r != -1) {
if (WIFEXITED(umount_r)) {
umount_r = WEXITSTATUS(umount_r);
cerr << "got error " << umount_r
<< " when unmounting Ceph on failed remount test!" << std::endl;
} else {
cerr << "attempt to umount on failed remount test failed (on a signal?)" << std::endl;
}
} else {
cerr << "system() invocation failed during remount test" << std::endl;
}
}
}
return reinterpret_cast<void*>(tr);
#else
return reinterpret_cast<void*>(0);
#endif
}
} tester;
// get monmap
Messenger *messenger = NULL;
Client *client;
CephFuse *cfuse;
UserPerm perms;
int tester_r = 0;
void *tester_rp = NULL;
MonClient *mc = new MonClient(g_ceph_context);
int r = mc->build_initial_monmap();
if (r == -EINVAL)
usage();
if (r < 0)
goto out_mc_start_failed;
// start up network
messenger = Messenger::create_client_messenger(g_ceph_context, "client");
messenger->set_default_policy(Messenger::Policy::lossy_client(0, 0));
messenger->set_policy(entity_name_t::TYPE_MDS,
Messenger::Policy::lossless_client(0, 0));
client = new Client(messenger, mc);
if (filer_flags) {
client->set_filer_flags(filer_flags);
}
cfuse = new CephFuse(client, forker.get_signal_fd());
r = cfuse->init(newargc, newargv);
if (r != 0) {
cerr << "ceph-fuse[" << getpid() << "]: fuse failed to initialize" << std::endl;
goto out_messenger_start_failed;
}
cerr << "ceph-fuse[" << getpid() << "]: starting ceph client" << std::endl;
r = messenger->start();
if (r < 0) {
cerr << "ceph-fuse[" << getpid() << "]: ceph messenger failed with " << cpp_strerror(-r) << std::endl;
goto out_messenger_start_failed;
}
init_async_signal_handler();
register_async_signal_handler(SIGHUP, sighup_handler);
// start client
r = client->init();
if (r < 0) {
cerr << "ceph-fuse[" << getpid() << "]: ceph client failed with " << cpp_strerror(-r) << std::endl;
goto out_init_failed;
}
client->update_metadata("mount_point", cfuse->get_mount_point());
perms = client->pick_my_perms();
// start up fuse
// use my argc, argv (make sure you pass a mount point!)
r = client->mount(g_conf->client_mountpoint.c_str(), perms,
g_ceph_context->_conf->fuse_require_active_mds);
if (r < 0) {
if (r == CEPH_FUSE_NO_MDS_UP)
cerr << "ceph-fuse[" << getpid() << "]: probably no MDS server is up?" << std::endl;
cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;
goto out_shutdown;
}
r = cfuse->start();
if (r != 0) {
cerr << "ceph-fuse[" << getpid() << "]: fuse failed to start" << std::endl;
goto out_client_unmount;
}
cerr << "ceph-fuse[" << getpid() << "]: starting fuse" << std::endl;
tester.init(cfuse, client);
tester.create("tester");
r = cfuse->loop();
tester.join(&tester_rp);
tester_r = static_cast<int>(reinterpret_cast<uint64_t>(tester_rp));
cerr << "ceph-fuse[" << getpid() << "]: fuse finished with error " << r
<< " and tester_r " << tester_r <<std::endl;
out_client_unmount:
client->unmount();
cfuse->finalize();
out_shutdown:
client->shutdown();
out_init_failed:
unregister_async_signal_handler(SIGHUP, sighup_handler);
shutdown_async_signal_handler();
// wait for messenger to finish
messenger->shutdown();
messenger->wait();
out_messenger_start_failed:
delete cfuse;
delete client;
delete messenger;
out_mc_start_failed:
free(newargv);
delete mc;
//cout << "child done" << std::endl;
return forker.signal_exit(r);
}
}
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