+++ /dev/null
-// -*- 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 "common/ceph_argparse.h"
-#include "global/global_init.h"
-#include "common/Formatter.h"
-#include "common/debug.h"
-#include "common/errno.h"
-#include "client/Inode.h"
-#include "client/Dentry.h"
-#include "client/Dir.h"
-#include "include/cephfs/libcephfs.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_client
-
-void usage()
-{
- std::cout << "Usage: ceph-client-debug [options] <inode number>" << std::endl;
- generic_client_usage();
-}
-
-
-/**
- * Given an inode, look up the path from the Client cache: assumes
- * client cache is fully populated.
- */
-void traverse_dentries(Inode *ino, std::vector<Dentry*> &parts)
-{
- if (ino->dn_set.empty()) {
- return;
- }
-
- Dentry* dn = *(ino->dn_set.begin());
- parts.push_back(dn);
- traverse_dentries(dn->dir->parent_inode, parts);
-}
-
-
-/**
- * Given an inode, send lookup requests to the MDS for
- * all its ancestors, such that the full trace will be
- * populated in client cache.
- */
-int lookup_trace(ceph_mount_info *client, inodeno_t const ino)
-{
- Inode *inode;
- int r = ceph_ll_lookup_inode(client, ino, &inode);
- if (r != 0) {
- return r;
- } else {
- if (!inode->dn_set.empty()) {
- Dentry *dn = *(inode->dn_set.begin());
- assert(dn->dir);
- assert(dn->dir->parent_inode);
- r = lookup_trace(client, dn->dir->parent_inode->ino);
- if (r) {
- return r;
- }
- } else {
- // We reached the root of the tree
- assert(inode->ino == CEPH_INO_ROOT);
- }
- }
-
- return r;
-}
-
-
-int main(int argc, const char **argv)
-{
- // Argument handling
- vector<const char*> args;
- argv_to_vec(argc, argv, args);
- env_to_vec(args);
-
- auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
- CODE_ENVIRONMENT_UTILITY,
- CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS);
-
- common_init_finish(g_ceph_context);
-
- // Expect exactly one positional argument (inode number)
- if (args.size() != 1) {
- usage();
- }
- char const *inode_str = args[0];
- inodeno_t inode = strtoll(inode_str, NULL, 0);
- if (inode <= 0) {
- derr << "Invalid inode: " << inode_str << dendl;
- return -1;
- }
-
- // Initialize filesystem client
- struct ceph_mount_info *client;
- int r = ceph_create_with_context(&client, g_ceph_context);
- if (r) {
- derr << "Error initializing libcephfs: " << cpp_strerror(r) << dendl;
- return r;
- }
-
- r = ceph_mount(client, "/");
- if (r) {
- derr << "Error mounting: " << cpp_strerror(r) << dendl;
- ceph_shutdown(client);
- return r;
- }
-
-
- // Populate client cache with inode of interest & ancestors
- r = lookup_trace(client, inode);
- if (r) {
- derr << "Error looking up inode " << std::hex << inode << std::dec <<
- ": " << cpp_strerror(r) << dendl;
- return -1;
- }
-
- // Retrieve inode of interest
- struct vinodeno_t vinode;
- vinode.ino = inode;
- vinode.snapid = CEPH_NOSNAP;
- Inode *ino = ceph_ll_get_inode(client, vinode);
-
- // Retrieve dentry trace
- std::vector<Dentry*> path;
- traverse_dentries(ino, path);
-
- // Print inode and path as a JSON object
- JSONFormatter jf(true);
- jf.open_object_section("client_debug");
- {
- jf.open_object_section("inode");
- {
- ino->dump(&jf);
- }
- jf.close_section(); // inode
- jf.open_array_section("path");
- {
- for (std::vector<Dentry*>::reverse_iterator p = path.rbegin(); p != path.rend(); ++p) {
- jf.open_object_section("dentry");
- {
- (*p)->dump(&jf);
- }
- jf.close_section(); // dentry
- }
- }
- jf.close_section(); // path
- }
- jf.close_section(); // client_debug
- jf.flush(std::cout);
- std::cout << std::endl;
-
- // Release Inode references
- ceph_ll_forget(client, ino, 1);
- for (std::vector<Dentry*>::reverse_iterator p = path.rbegin(); p != path.rend(); ++p) {
- ceph_ll_forget(client, (*p)->inode.get(), 1);
- }
- ino = NULL;
- path.clear();
-
- // Shut down
- r = ceph_unmount(client);
- if (r) {
- derr << "Error mounting: " << cpp_strerror(r) << dendl;
- }
- ceph_shutdown(client);
-
- return r;
-}