Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 340 insertions, 0 deletions

diff --git a/src/ceph_fuse.cc b/src/ceph_fuse.cc
new file mode 100644
index 00000000..8b8292c2
--- /dev/null
+++ b/src/ceph_fuse.cc
@@ -0,0 +1,340 @@
+// -*- 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>
+
+#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>
+#include <fuse_lowlevel.h>
+
+#define dout_context g_ceph_context
+
+static void fuse_usage()
+{
+  const char* argv[] = {
+    "ceph-fuse",
+    "-h",
+  };
+  struct fuse_args args = FUSE_ARGS_INIT(2, (char**)argv);
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+  struct fuse_cmdline_opts opts = {};
+  if (fuse_parse_cmdline(&args, &opts) == -1) {
+#else
+  if (fuse_parse_cmdline(&args, nullptr, nullptr, nullptr) == -1) {
+#endif
+    derr << "fuse_parse_cmdline failed." << dendl;
+  }
+  ceph_assert(args.allocated);
+  fuse_opt_free_args(&args);
+}
+
+void usage()
+{
+  cout <<
+"usage: ceph-fuse [-n client.username] [-m mon-ip-addr:mon-port] <mount point> [OPTIONS]\n"
+"  --client_mountpoint/-r <sub_directory>\n"
+"                    use sub_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;
+  std::vector<const char*> args;
+  argv_to_vec(argc, argv, args);
+  if (args.empty()) {
+    cerr << argv[0] << ": -h or --help for usage" << std::endl;
+    exit(1);
+  }
+  if (ceph_argparse_need_usage(args)) {
+    usage();
+    exit(0);
+  }
+
+  std::map<std::string,std::string> defaults = {
+    { "pid_file", "" },
+    { "chdir", "/" }  // FUSE will chdir("/"); be ready.
+  };
+
+  auto cct = global_init(&defaults, args, CEPH_ENTITY_TYPE_CLIENT,
+			 CODE_ENVIRONMENT_DAEMON,
+			 CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS);
+
+  for (auto i = args.begin(); i != args.end();) {
+    if (ceph_argparse_double_dash(args, i)) {
+      break;
+    } else if (ceph_argparse_flag(args, i, "--localize-reads", (char*)nullptr)) {
+      cerr << "setting CEPH_OSD_FLAG_LOCALIZE_READS" << std::endl;
+      filer_flags |= CEPH_OSD_FLAG_LOCALIZE_READS;
+    } else if (ceph_argparse_flag(args, i, "-V", (char*)nullptr)) {
+      const char* tmpargv[] = {
+	"ceph-fuse",
+	"-V"
+      };
+
+      struct fuse_args fargs = FUSE_ARGS_INIT(2, (char**)tmpargv);
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+      struct fuse_cmdline_opts opts = {};
+      if (fuse_parse_cmdline(&fargs, &opts) == -1) {
+#else
+      if (fuse_parse_cmdline(&fargs, nullptr, nullptr, nullptr) == -1) {
+#endif
+       derr << "fuse_parse_cmdline failed." << dendl;
+      }
+      ceph_assert(fargs.allocated);
+      fuse_opt_free_args(&fargs);
+      exit(0);
+    } else {
+      ++i;
+    }
+  }
+
+  // args for fuse
+  const char **newargv;
+  int newargc;
+  vec_to_argv(argv[0], args, &newargc, &newargv);
+
+  // check for 32-bit arch
+#ifndef __LP64__
+    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;
+#endif
+
+  Preforker forker;
+  auto daemonize = g_conf().get_val<bool>("daemonize");
+  if (daemonize) {
+    global_init_prefork(g_ceph_context);
+    int r;
+    string err;
+    r = forker.prefork(err);
+    if (r < 0 || forker.is_parent()) {
+      // Start log if current process is about to exit. Otherwise, we hit an assert
+      // in the Ceph context destructor.
+      g_ceph_context->_log->start();
+    }
+    if (r < 0) {
+      cerr << "ceph-fuse " << err << std::endl;
+      return r;
+    }
+    if (forker.is_parent()) {
+      r = forker.parent_wait(err);
+      if (r < 0) {
+	cerr << "ceph-fuse " << err << std::endl;
+      }
+      return r;
+    }
+    global_init_postfork_start(cct.get());
+  }
+
+  {
+    common_init_finish(g_ceph_context);
+
+    init_async_signal_handler();
+    register_async_signal_handler(SIGHUP, sighup_handler);
+
+    //cout << "child, mounting" << std::endl;
+    class RemountTest : public Thread {
+    public:
+      CephFuse *cfuse;
+      Client *client;
+      RemountTest() : cfuse(nullptr), client(nullptr) {}
+      void init(CephFuse *cf, Client *cl) {
+	cfuse = cf;
+	client = cl;
+      }
+      ~RemountTest() override {}
+      void *entry() override {
+#if defined(__linux__)
+	int ver = get_linux_version();
+	ceph_assert(ver != 0);
+        bool client_try_dentry_invalidate = g_conf().get_val<bool>(
+          "client_try_dentry_invalidate");
+	bool can_invalidate_dentries =
+          client_try_dentry_invalidate && ver < KERNEL_VERSION(3, 18, 0);
+	int tr = client->test_dentry_handling(can_invalidate_dentries);
+        bool client_die_on_failed_dentry_invalidate = g_conf().get_val<bool>(
+          "client_die_on_failed_dentry_invalidate");
+	if (tr != 0 && client_die_on_failed_dentry_invalidate) {
+	  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 = nullptr;
+    StandaloneClient *client;
+    CephFuse *cfuse;
+    UserPerm perms;
+    int tester_r = 0;
+    void *tester_rp = nullptr;
+
+    MonClient *mc = new MonClient(g_ceph_context);
+    int r = mc->build_initial_monmap();
+    if (r == -EINVAL) {
+      cerr << "failed to generate initial mon list" << std::endl;
+      exit(1);
+    }
+    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));
+    messenger->set_policy(entity_name_t::TYPE_MDS,
+			  Messenger::Policy::lossless_client(0));
+
+    client = new StandaloneClient(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;
+    }
+
+    // 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!)
+      auto client_mountpoint = g_conf().get_val<std::string>(
+        "client_mountpoint");
+      auto mountpoint = client_mountpoint.c_str();
+      auto fuse_require_active_mds = g_conf().get_val<bool>(
+        "fuse_require_active_mds");
+      r = client->mount(mountpoint, perms, 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;
+        r = EXIT_FAILURE;
+        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;
+    cfuse = nullptr;
+    delete client;
+    client = nullptr;
+    delete messenger;
+    messenger = nullptr;
+  out_mc_start_failed:
+    free(newargv);
+    delete mc;
+    mc = nullptr;
+    //cout << "child done" << std::endl;
+    return forker.signal_exit(r);
+  }
+}