mirror of https://github.com/ceph/ceph
1126 lines
25 KiB
C++
1126 lines
25 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:4; indent-tabs-mode:t -*-
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// vim: ts=8 sw=4 smarttab
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/*
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FUSE: Filesystem in Userspace
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Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
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This program can be distributed under the terms of the GNU GPL.
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See the file COPYING.
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gcc -Wall `pkg-config fuse --cflags --libs` -lulockmgr fusexmp_fh.c -o fusexmp_fh
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*/
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#define FUSE_USE_VERSION 26
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <fuse/fuse_lowlevel.h>
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#include <ulockmgr.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <errno.h>
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#include <sys/time.h>
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#ifdef HAVE_SETXATTR
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#include <sys/xattr.h>
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#endif
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#include <sys/time.h>
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#include <time.h>
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#include <ext/hash_map>
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using namespace __gnu_cxx;
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#ifndef __LP64__
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namespace __gnu_cxx {
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template<> struct hash<uint64_t> {
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size_t operator()(uint64_t __x) const {
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static hash<uint32_t> H;
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return H((__x >> 32) ^ (__x & 0xffffffff));
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}
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};
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}
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#endif
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#include <iostream>
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#include <fstream>
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#include <map>
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#include <set>
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using namespace std;
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#include "common/Mutex.h"
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Mutex trace_lock;
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ofstream tracefile;
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#define traceout (tracefile.is_open() ? tracefile : cout)
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char *basedir = 0;
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int debug = 0;
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bool do_timestamps = true;
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#define dout if (debug) cout
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Mutex lock;
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struct Inode {
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struct stat stbuf;
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int ref;
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set<int> fds;
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map<pair<string,ino_t>,Inode*> parents;
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// if dir,
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map<string,Inode*> dentries;
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Inode() : ref(0) {}
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Inode *lookup(const string& dname) {
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if (dentries.count(dname))
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return dentries[dname];
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return 0;
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}
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};
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Inode *root = 0;
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hash_map<ino_t, Inode*> inode_map;
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bool make_inode_path(string &buf, Inode *in)
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{
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if (!in->parents.empty()) {
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if (!make_inode_path(buf, in->parents.begin()->second))
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return false;
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buf += "/";
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buf += in->parents.begin()->first.first;
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} else {
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if (in != root) return false;
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assert(in->stbuf.st_ino == 1);
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buf = basedir;
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buf += "/";
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}
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return true;
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//dout << "path: " << in->stbuf.st_ino << " -> " << buf << endl;
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}
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bool make_inode_path(string &buf, Inode *in, const char *name)
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{
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if (!make_inode_path(buf, in)) return false;
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buf += "/";
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buf += name;
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return true;
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}
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bool make_ino_path(string &buf, ino_t ino)
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{
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Inode *in = inode_map[ino];
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assert(in);
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return make_inode_path(buf, in);
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}
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bool make_ino_path(string &buf, ino_t ino, const char *name)
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{
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Inode *in = inode_map[ino];
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assert(in);
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if (!make_inode_path(buf, in))
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return false;
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buf += "/";
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buf += name;
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return true;
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}
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void remove_dentry(Inode *pin, const string& dname)
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{
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dout << "remove_dentry " << pin->stbuf.st_ino << " " << dname << endl;
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Inode *in = pin->lookup(dname);
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assert(in);
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pin->dentries.erase(dname);
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in->parents.erase(pair<string,ino_t>(dname,pin->stbuf.st_ino));
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dout << "remove_dentry " << pin->stbuf.st_ino << " " << dname
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<< " ... inode " << in->stbuf.st_ino << " ref " << in->ref
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<< endl;
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}
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void add_dentry(Inode *parent, const string& dname, Inode *in)
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{
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dout << "add_dentry " << parent->stbuf.st_ino << " " << dname << " to " << in->stbuf.st_ino << endl;
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if (parent->dentries.count(dname))
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remove_dentry(parent, dname); // e.g., when renaming over another file..
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parent->dentries[dname] = in;
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in->parents[pair<string,ino_t>(dname,parent->stbuf.st_ino)] = parent;
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}
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void unlink_inode(Inode *in)
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{
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dout << "unlink_inode " << in->stbuf.st_ino << " ref " << in->ref << endl;
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// remove parent links
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while (!in->parents.empty()) {
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Inode *parent = in->parents.begin()->second;
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string dname = in->parents.begin()->first.first;
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remove_dentry(parent, dname);
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}
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// remove children
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while (!in->dentries.empty())
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remove_dentry(in, in->dentries.begin()->first);
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while (!in->fds.empty()) {
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int fd = *in->fds.begin();
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::close(fd);
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in->fds.erase(in->fds.begin());
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dout << "remove_inode closeing stray fd " << fd << endl;
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}
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}
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void remove_inode(Inode *in)
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{
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dout << "remove_inode " << in->stbuf.st_ino << " ref " << in->ref << endl;
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unlink_inode(in);
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inode_map.erase(in->stbuf.st_ino);
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dout << "remove_inode " << in->stbuf.st_ino << " done" << endl;
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delete in;
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}
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Inode *add_inode(Inode *parent, const char *name, struct stat *attr)
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{
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dout << "add_inode " << parent->stbuf.st_ino << " " << name << " " << attr->st_ino << endl;
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Inode *in;
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if (inode_map.count(attr->st_ino)) {
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// reuse inode
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in = inode_map[attr->st_ino];
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unlink_inode(in); // hrm.. should this close open fds? probably.
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dout << "** REUSING INODE **" << endl;
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} else {
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inode_map[attr->st_ino] = in = new Inode;
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}
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memcpy(&in->stbuf, attr, sizeof(*attr));
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string dname(name);
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add_dentry(parent, dname, in);
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return in;
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}
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void print_time()
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{
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if (do_timestamps) {
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struct timeval tv;
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gettimeofday(&tv, 0);
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traceout << "@" << endl
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<< tv.tv_sec << endl
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<< tv.tv_usec << endl;
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}
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}
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static void ft_ll_lookup(fuse_req_t req, fuse_ino_t pino, const char *name)
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{
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int res = 0;
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//dout << "lookup " << pino << " " << name << endl;
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struct fuse_entry_param fe;
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memset(&fe, 0, sizeof(fe));
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lock.Lock();
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Inode *parent = inode_map[pino];
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assert(parent);
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string dname(name);
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string path;
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Inode *in = 0;
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if (!make_inode_path(path, parent, name)) {
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res = ENOENT;
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} else {
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in = parent->lookup(dname);
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if (in && res == 0) {
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// re-stat, for good measure
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res = ::lstat(path.c_str(), &in->stbuf);
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// hrm!
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if (res != 0) {
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dout << "** WEIRD ** lookup on " << pino << " " << name << " inode went away!" << endl;
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in = 0;
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res = errno;
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}
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//dout << "have " << in->stbuf.st_ino << endl;
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} else {
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in = new Inode;
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res = ::lstat(path.c_str(), &in->stbuf);
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//dout << "stat " << path << " res = " << res << endl;
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if (res == 0) {
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inode_map[in->stbuf.st_ino] = in;
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add_dentry(parent, dname, in);
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} else {
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delete in;
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in = 0;
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res = errno;
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}
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}
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if (in) {
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in->ref++;
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fe.ino = in->stbuf.st_ino;
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memcpy(&fe.attr, &in->stbuf, sizeof(in->stbuf));
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}
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}
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lock.Unlock();
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trace_lock.Lock();
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print_time();
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traceout << "ll_lookup" << endl << pino << endl << name << endl << fe.attr.st_ino << endl;
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trace_lock.Unlock();
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if (in)
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fuse_reply_entry(req, &fe);
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else
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fuse_reply_err(req, res);
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}
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static void ft_ll_forget(fuse_req_t req, fuse_ino_t ino, long unsigned nlookup)
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{
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if (ino != 1) {
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lock.Lock();
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Inode *in = inode_map[ino];
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if (in) {
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dout << "forget on " << ino << " ref " << in->ref << ", forget " << nlookup << endl;
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if (in->ref < nlookup)
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dout << "**** BAD **** forget on " << ino << " ref " << in->ref << ", forget " << nlookup << endl;
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in->ref -= nlookup;
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if (in->ref <= 0)
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remove_inode(in);
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} else {
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dout << "**** BAD **** forget " << nlookup << " on nonexistent inode " << ino << endl;
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}
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lock.Unlock();
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}
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trace_lock.Lock();
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print_time();
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traceout << "ll_forget" << endl << ino << endl << nlookup << endl;
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trace_lock.Unlock();
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fuse_reply_none(req);
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}
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static void ft_ll_getattr(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
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{
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int res = 0;
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string path;
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int fd = 0;
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Inode *in = 0;
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struct stat attr;
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lock.Lock();
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in = inode_map[ino];
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if (in->fds.empty()) {
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if (!make_inode_path(path, in))
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res = ENOENT;
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} else
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fd = *in->fds.begin();
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lock.Unlock();
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if (fd > 0) {
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res = ::fstat(fd, &attr);
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dout << "getattr fstat on fd " << fd << " res " << res << endl;
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} else if (res == 0) {
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res = ::lstat(path.c_str(), &attr);
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dout << "getattr lstat on " << path << " res " << res << endl;
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}
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if (res < 0) res = errno;
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if (ino == 1) attr.st_ino = 1;
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trace_lock.Lock();
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print_time();
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traceout << "ll_getattr" << endl << ino << endl;
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trace_lock.Unlock();
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if (res == 0) {
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lock.Lock();
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memcpy(&in->stbuf, &attr, sizeof(attr));
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lock.Unlock();
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fuse_reply_attr(req, &attr, 0);
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} else
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fuse_reply_err(req, res);
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}
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static void ft_ll_setattr(fuse_req_t req, fuse_ino_t ino, struct stat *attr,
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int to_set, struct fuse_file_info *fi)
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{
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string path;
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Inode *in = 0;
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int fd = 0;
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int res = 0;
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lock.Lock();
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in = inode_map[ino];
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if (in->fds.empty() || (to_set & FUSE_SET_ATTR_MTIME)) {
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if (!make_inode_path(path, in))
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res = ENOENT;
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} else
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fd = *in->fds.begin();
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lock.Unlock();
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trace_lock.Lock();
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print_time();
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traceout << "ll_setattr" << endl << ino << endl;
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traceout << attr->st_mode << endl;
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traceout << attr->st_uid << endl << attr->st_gid << endl;
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traceout << attr->st_size << endl;
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traceout << attr->st_mtime << endl;
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traceout << attr->st_atime << endl;
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traceout << to_set << endl;
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trace_lock.Unlock();
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if (res == 0) {
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if (to_set & FUSE_SET_ATTR_MODE) {
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if (fd > 0)
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res = ::fchmod(fd, attr->st_mode);
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else
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res = ::chmod(path.c_str(), attr->st_mode);
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}
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if (!res && to_set & FUSE_SET_ATTR_UID) {
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if (fd > 0)
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res = ::fchown(fd, attr->st_uid, attr->st_gid);
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else
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res = ::chown(path.c_str(), attr->st_uid, attr->st_gid);
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}
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if (!res && to_set & FUSE_SET_ATTR_SIZE) {
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if (fd > 0)
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res = ::ftruncate(fd, attr->st_size);
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else
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res = ::truncate(path.c_str(), attr->st_size);
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}
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if (!res && to_set & FUSE_SET_ATTR_MTIME) {
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struct utimbuf ut;
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ut.actime = attr->st_atime;
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ut.modtime = attr->st_mtime;
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res = ::utime(path.c_str(), &ut);
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}
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if (res < 0) res = errno;
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}
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if (res == 0) {
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lock.Lock();
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::lstat(path.c_str(), &in->stbuf);
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if (ino == 1) in->stbuf.st_ino = 1;
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memcpy(attr, &in->stbuf, sizeof(*attr));
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lock.Unlock();
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fuse_reply_attr(req, attr, 0);
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} else
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fuse_reply_err(req, res);
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}
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static void ft_ll_readlink(fuse_req_t req, fuse_ino_t ino)
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{
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string path;
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int res = 0;
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lock.Lock();
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if (!make_ino_path(path, ino))
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res = ENOENT;
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lock.Unlock();
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trace_lock.Lock();
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print_time();
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traceout << "ll_readlink" << endl << ino << endl;
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trace_lock.Unlock();
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char buf[256];
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if (res == 0) res = readlink(path.c_str(), buf, 255);
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if (res < 0) res = errno;
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if (res >= 0) {
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buf[res] = 0;
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fuse_reply_readlink(req, buf);
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} else {
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fuse_reply_err(req, res);
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}
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}
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static void ft_ll_opendir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
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{
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string path;
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int res = 0;
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lock.Lock();
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if (!make_ino_path(path, ino))
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res = ENOENT;
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lock.Unlock();
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DIR *dir = 0;
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if (res == 0) dir = opendir(path.c_str());
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if (res < 0) res = errno;
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trace_lock.Lock();
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print_time();
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traceout << "ll_opendir" << endl << ino << endl << (unsigned long)dir << endl;
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trace_lock.Unlock();
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if (dir) {
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fi->fh = (long)dir;
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fuse_reply_open(req, fi);
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} else
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fuse_reply_err(req, res);
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}
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static void ft_ll_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
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off_t off, struct fuse_file_info *fi)
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{
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struct dirent *de;
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DIR *dp = (DIR*)fi->fh;
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// buffer
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char *buf;
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size_t pos = 0;
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buf = new char[size];
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if (!buf) {
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fuse_reply_err(req, ENOMEM);
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return;
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}
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seekdir(dp, off);
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while ((de = readdir(dp)) != NULL) {
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struct stat st;
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memset(&st, 0, sizeof(st));
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st.st_ino = de->d_ino;
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st.st_mode = de->d_type << 12;
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size_t entrysize = fuse_add_direntry(req, buf + pos, size - pos,
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de->d_name, &st, telldir(dp));
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if (entrysize > size - pos)
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break; // didn't fit, done for now.
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pos += entrysize;
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}
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fuse_reply_buf(req, buf, pos);
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delete[] buf;
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}
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static void ft_ll_releasedir(fuse_req_t req, fuse_ino_t ino,
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struct fuse_file_info *fi)
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{
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DIR *dir = (DIR*)fi->fh;
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trace_lock.Lock();
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print_time();
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traceout << "ll_releasedir" << endl << (unsigned long)dir << endl;
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trace_lock.Unlock();
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closedir(dir);
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fuse_reply_err(req, 0);
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}
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static void ft_ll_mknod(fuse_req_t req, fuse_ino_t parent, const char *name,
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mode_t mode, dev_t rdev)
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{
|
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string path;
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Inode *pin = 0;
|
|
int res = 0;
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
dout << "mknod " << path << endl;
|
|
if (res == 0) res = ::mknod(path.c_str(), mode, rdev);
|
|
if (res < 0) res = errno;
|
|
|
|
struct fuse_entry_param fe;
|
|
if (res == 0) {
|
|
memset(&fe, 0, sizeof(fe));
|
|
::lstat(path.c_str(), &fe.attr);
|
|
fe.ino = fe.attr.st_ino;
|
|
lock.Lock();
|
|
Inode *in = add_inode(pin, name, &fe.attr);
|
|
in->ref++;
|
|
lock.Unlock();
|
|
}
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_mknod" << endl << parent << endl << name << endl << mode << endl << rdev << endl;
|
|
traceout << (res == 0 ? fe.ino:0) << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0)
|
|
fuse_reply_entry(req, &fe);
|
|
else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_mkdir(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
mode_t mode)
|
|
{
|
|
string path;
|
|
Inode *pin = 0;
|
|
int res = 0;
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
if (res == 0) res = ::mkdir(path.c_str(), mode);
|
|
if (res < 0) res = errno;
|
|
|
|
struct fuse_entry_param fe;
|
|
if (res == 0) {
|
|
memset(&fe, 0, sizeof(fe));
|
|
::lstat(path.c_str(), &fe.attr);
|
|
fe.ino = fe.attr.st_ino;
|
|
lock.Lock();
|
|
Inode *in = add_inode(pin, name, &fe.attr);
|
|
in->ref++;
|
|
lock.Unlock();
|
|
}
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_mkdir" << endl << parent << endl << name << endl << mode << endl;
|
|
traceout << (res == 0 ? fe.ino:0) << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0)
|
|
fuse_reply_entry(req, &fe);
|
|
else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_symlink(fuse_req_t req, const char *value, fuse_ino_t parent, const char *name)
|
|
{
|
|
string path;
|
|
Inode *pin = 0;
|
|
int res = 0;
|
|
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
if (res == 0) res = ::symlink(value, path.c_str());
|
|
if (res < 0) res = errno;
|
|
|
|
struct fuse_entry_param fe;
|
|
if (res == 0) {
|
|
memset(&fe, 0, sizeof(fe));
|
|
::lstat(path.c_str(), &fe.attr);
|
|
fe.ino = fe.attr.st_ino;
|
|
lock.Lock();
|
|
Inode *in = add_inode(pin, name, &fe.attr);
|
|
in->ref++;
|
|
lock.Unlock();
|
|
}
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_symlink" << endl << parent << endl << name << endl << value << endl;
|
|
traceout << (res == 0 ? fe.ino:0) << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0)
|
|
fuse_reply_entry(req, &fe);
|
|
else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_create(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
mode_t mode, struct fuse_file_info *fi)
|
|
{
|
|
string path;
|
|
Inode *pin = 0;
|
|
int res = 0;
|
|
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
dout << "create " << path << endl;
|
|
int fd = 0;
|
|
if (res == 0) {
|
|
fd = ::open(path.c_str(), fi->flags|O_CREAT, mode);
|
|
if (fd < 0) res = errno;
|
|
}
|
|
|
|
struct fuse_entry_param fe;
|
|
memset(&fe, 0, sizeof(fe));
|
|
if (res == 0) {
|
|
::lstat(path.c_str(), &fe.attr);
|
|
fe.ino = fe.attr.st_ino;
|
|
lock.Lock();
|
|
Inode *in = add_inode(pin, name, &fe.attr);
|
|
in->ref++;
|
|
in->fds.insert(fd);
|
|
lock.Unlock();
|
|
fi->fh = fd;
|
|
}
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_create" << endl
|
|
<< parent << endl
|
|
<< name << endl
|
|
<< mode << endl
|
|
<< fi->flags << endl
|
|
<< (res == 0 ? fd:0) << endl
|
|
<< fe.ino << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0)
|
|
fuse_reply_create(req, &fe, fi);
|
|
else
|
|
fuse_reply_err(req, res);
|
|
|
|
}
|
|
|
|
|
|
static void ft_ll_statfs(fuse_req_t req, fuse_ino_t ino)
|
|
{
|
|
string path;
|
|
int res = 0;
|
|
if (ino) {
|
|
lock.Lock();
|
|
if (!make_ino_path(path, ino))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
} else {
|
|
path = basedir;
|
|
}
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_statfs" << endl << ino << endl;
|
|
trace_lock.Unlock();
|
|
|
|
struct statvfs stbuf;
|
|
if (res == 0) res = statvfs(path.c_str(), &stbuf);
|
|
if (res < 0) res = errno;
|
|
|
|
if (res == 0)
|
|
fuse_reply_statfs(req, &stbuf);
|
|
else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_unlink(fuse_req_t req, fuse_ino_t parent, const char *name)
|
|
{
|
|
string path;
|
|
Inode *pin = 0;
|
|
Inode *in = 0;
|
|
string dname(name);
|
|
int res = 0;
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
in = pin->lookup(dname);
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_unlink" << endl << parent << endl << name << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0) {
|
|
if (in && in->fds.empty()) {
|
|
int fd = ::open(path.c_str(), O_RDWR);
|
|
if (fd > 0)
|
|
in->fds.insert(fd); // for slow getattrs.. wtf
|
|
dout << "unlink opening paranoia fd " << fd << endl;
|
|
}
|
|
res = ::unlink(path.c_str());
|
|
if (res < 0) res = errno;
|
|
}
|
|
|
|
if (res == 0) {
|
|
// remove from out cache
|
|
lock.Lock();
|
|
string dname(name);
|
|
if (pin->lookup(dname))
|
|
remove_dentry(pin, dname);
|
|
lock.Unlock();
|
|
fuse_reply_err(req, 0);
|
|
} else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_rmdir(fuse_req_t req, fuse_ino_t parent, const char *name)
|
|
{
|
|
string path;
|
|
Inode *pin = 0;
|
|
int res = 0;
|
|
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_rmdir" << endl << parent << endl << name << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0) res = ::rmdir(path.c_str());
|
|
if (res < 0) res = errno;
|
|
|
|
if (res == 0) {
|
|
// remove from out cache
|
|
lock.Lock();
|
|
string dname(name);
|
|
if (pin->lookup(dname))
|
|
remove_dentry(pin, dname);
|
|
lock.Unlock();
|
|
fuse_reply_err(req, 0);
|
|
} else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
|
|
static void ft_ll_rename(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
fuse_ino_t newparent, const char *newname)
|
|
{
|
|
string path;
|
|
string newpath;
|
|
Inode *pin = 0;
|
|
Inode *newpin = 0;
|
|
int res = 0;
|
|
lock.Lock();
|
|
pin = inode_map[parent];
|
|
if (!make_inode_path(path, pin, name))
|
|
res = ENOENT;
|
|
newpin = inode_map[newparent];
|
|
if (!make_inode_path(newpath, newpin, newname))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_rename" << endl
|
|
<< parent << endl
|
|
<< name << endl
|
|
<< newparent << endl
|
|
<< newname << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res == 0) res = ::rename(path.c_str(), newpath.c_str());
|
|
if (res < 0) res = errno;
|
|
|
|
if (res == 0) {
|
|
string dname(name);
|
|
string newdname(newname);
|
|
lock.Lock();
|
|
Inode *in = pin->lookup(dname);
|
|
if (in) {
|
|
add_dentry(newpin, newdname, in);
|
|
remove_dentry(pin, dname);
|
|
} else {
|
|
dout << "hrm, rename didn't have renamed inode.. " << path << " to " << newpath << endl;
|
|
}
|
|
lock.Unlock();
|
|
fuse_reply_err(req, 0);
|
|
} else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_link(fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
|
|
const char *newname)
|
|
{
|
|
string path;
|
|
string newpath;
|
|
Inode *in = 0;
|
|
Inode *newpin = 0;
|
|
int res = 0;
|
|
lock.Lock();
|
|
in = inode_map[ino];
|
|
if (!make_inode_path(path, in))
|
|
res = ENOENT;
|
|
|
|
newpin = inode_map[newparent];
|
|
if (!make_inode_path(newpath, newpin, newname))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_link" << endl
|
|
<< ino << endl
|
|
<< newparent << endl
|
|
<< newname << endl;
|
|
trace_lock.Unlock();
|
|
|
|
//cout << "link " << path << " newpath " << newpath << endl;
|
|
if (res == 0) res = ::link(path.c_str(), newpath.c_str());
|
|
if (res < 0) res = errno;
|
|
|
|
if (res == 0) {
|
|
struct fuse_entry_param fe;
|
|
memset(&fe, 0, sizeof(fe));
|
|
::lstat(newpath.c_str(), &fe.attr);
|
|
|
|
lock.Lock();
|
|
string newdname(newname);
|
|
add_dentry(newpin, newdname, in);
|
|
in->ref++;
|
|
memcpy(&in->stbuf, &fe.attr, sizeof(fe.attr)); // re-read, bc we changed the link count
|
|
lock.Unlock();
|
|
|
|
fe.ino = fe.attr.st_ino;
|
|
fuse_reply_entry(req, &fe);
|
|
} else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
|
|
{
|
|
string path;
|
|
Inode *in = 0;
|
|
int res = 0;
|
|
|
|
lock.Lock();
|
|
in = inode_map[ino];
|
|
if (!make_inode_path(path, in))
|
|
res = ENOENT;
|
|
lock.Unlock();
|
|
|
|
int fd = 0;
|
|
if (res == 0) {
|
|
fd = ::open(path.c_str(), fi->flags);
|
|
if (fd <= 0) res = errno;
|
|
}
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_open" << endl
|
|
<< ino << endl
|
|
<< fi->flags << endl
|
|
<< (fd > 0 ? fd:0) << endl;;
|
|
trace_lock.Unlock();
|
|
|
|
if (fd > 0) {
|
|
lock.Lock();
|
|
in->fds.insert(fd);
|
|
lock.Unlock();
|
|
fi->fh = fd;
|
|
fuse_reply_open(req, fi);
|
|
} else
|
|
fuse_reply_err(req, res);
|
|
}
|
|
|
|
static void ft_ll_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
|
|
struct fuse_file_info *fi)
|
|
{
|
|
|
|
char *buf = new char[size];
|
|
int res = ::pread(fi->fh, buf, size, off);
|
|
|
|
//cout << "read " << path << " " << off << "~" << size << endl;
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_read" << endl
|
|
<< fi->fh << endl
|
|
<< off << endl
|
|
<< size << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res >= 0)
|
|
fuse_reply_buf(req, buf, res);
|
|
else
|
|
fuse_reply_err(req, errno);
|
|
delete[] buf;
|
|
}
|
|
|
|
static void ft_ll_write(fuse_req_t req, fuse_ino_t ino, const char *buf,
|
|
size_t size, off_t off, struct fuse_file_info *fi)
|
|
{
|
|
int res = ::pwrite(fi->fh, buf, size, off);
|
|
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_write" << endl
|
|
<< fi->fh << endl
|
|
<< off << endl
|
|
<< size << endl;
|
|
trace_lock.Unlock();
|
|
|
|
if (res >= 0)
|
|
fuse_reply_write(req, res);
|
|
else
|
|
fuse_reply_err(req, errno);
|
|
}
|
|
|
|
static void ft_ll_flush(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
|
|
{
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_flush" << endl << fi->fh << endl;
|
|
trace_lock.Unlock();
|
|
|
|
int res = ::fdatasync(fi->fh);
|
|
//int res = ::close(dup(fi->fh));
|
|
if (res >= 0)
|
|
fuse_reply_err(req, 0);
|
|
else
|
|
fuse_reply_err(req, errno);
|
|
}
|
|
|
|
static void ft_ll_release(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
|
|
{
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_release" << endl << fi->fh << endl;
|
|
trace_lock.Unlock();
|
|
|
|
lock.Lock();
|
|
Inode *in = inode_map[ino];
|
|
in->fds.erase(fi->fh);
|
|
lock.Unlock();
|
|
|
|
int res = ::close(fi->fh);
|
|
if (res >= 0)
|
|
fuse_reply_err(req, 0);
|
|
else
|
|
fuse_reply_err(req, errno);
|
|
}
|
|
|
|
static void ft_ll_fsync(fuse_req_t req, fuse_ino_t ino, int datasync,
|
|
struct fuse_file_info *fi)
|
|
{
|
|
trace_lock.Lock();
|
|
print_time();
|
|
traceout << "ll_fsync" << endl << fi->fh << endl;
|
|
trace_lock.Unlock();
|
|
|
|
int res = ::fsync(fi->fh);
|
|
if (res >= 0)
|
|
fuse_reply_err(req, 0);
|
|
else
|
|
fuse_reply_err(req, errno);
|
|
}
|
|
|
|
static struct fuse_lowlevel_ops ft_ll_oper = {
|
|
init: 0,
|
|
destroy: 0,
|
|
lookup: ft_ll_lookup,
|
|
forget: ft_ll_forget,
|
|
getattr: ft_ll_getattr,
|
|
setattr: ft_ll_setattr,
|
|
readlink: ft_ll_readlink,
|
|
mknod: ft_ll_mknod,
|
|
mkdir: ft_ll_mkdir,
|
|
unlink: ft_ll_unlink,
|
|
rmdir: ft_ll_rmdir,
|
|
symlink: ft_ll_symlink,
|
|
rename: ft_ll_rename,
|
|
link: ft_ll_link,
|
|
open: ft_ll_open,
|
|
read: ft_ll_read,
|
|
write: ft_ll_write,
|
|
flush: ft_ll_flush,
|
|
release: ft_ll_release,
|
|
fsync: ft_ll_fsync,
|
|
opendir: ft_ll_opendir,
|
|
readdir: ft_ll_readdir,
|
|
releasedir: ft_ll_releasedir,
|
|
fsyncdir: 0,
|
|
statfs: ft_ll_statfs,
|
|
setxattr: 0,
|
|
getxattr: 0,
|
|
listxattr: 0,
|
|
removexattr: 0,
|
|
access: 0,
|
|
create: ft_ll_create,
|
|
getlk: 0,
|
|
setlk: 0,
|
|
bmap: 0
|
|
};
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
// open trace
|
|
|
|
// figure base dir
|
|
char *newargv[100];
|
|
int newargc = 0;
|
|
for (int i=0; i<argc; i++) {
|
|
if (strcmp(argv[i], "--basedir") == 0) {
|
|
basedir = argv[++i];
|
|
} else if (strcmp(argv[i], "--timestamps") == 0) {
|
|
do_timestamps = atoi(argv[++i]);
|
|
} else if (strcmp(argv[i], "--trace") == 0) {
|
|
tracefile.open(argv[++i], ios::out|ios::trunc);
|
|
if (!tracefile.is_open())
|
|
cerr << "** couldn't open trace file " << argv[i] << endl;
|
|
} else if (strcmp(argv[i], "--debug") == 0) {
|
|
debug = 1;
|
|
} else {
|
|
cout << "arg: " << newargc << " " << argv[i] << endl;
|
|
newargv[newargc++] = argv[i];
|
|
}
|
|
}
|
|
newargv[newargc++] = "-o";
|
|
newargv[newargc++] = "allow_other";
|
|
if (!basedir) return 1;
|
|
cout << "basedir is " << basedir << endl;
|
|
|
|
// create root ino
|
|
root = new Inode;
|
|
::lstat(basedir, &root->stbuf);
|
|
root->stbuf.st_ino = 1;
|
|
inode_map[1] = root;
|
|
root->ref++;
|
|
|
|
umask(0);
|
|
|
|
// go go gadget fuse
|
|
struct fuse_args args = FUSE_ARGS_INIT(newargc, newargv);
|
|
struct fuse_chan *ch;
|
|
char *mountpoint;
|
|
int err = -1;
|
|
|
|
if (fuse_parse_cmdline(&args, &mountpoint, NULL, NULL) != -1 &&
|
|
(ch = fuse_mount(mountpoint, &args)) != NULL) {
|
|
struct fuse_session *se;
|
|
|
|
// init fuse
|
|
se = fuse_lowlevel_new(&args, &ft_ll_oper, sizeof(ft_ll_oper),
|
|
NULL);
|
|
if (se != NULL) {
|
|
if (fuse_set_signal_handlers(se) != -1) {
|
|
fuse_session_add_chan(se, ch);
|
|
err = fuse_session_loop(se);
|
|
fuse_remove_signal_handlers(se);
|
|
fuse_session_remove_chan(ch);
|
|
}
|
|
fuse_session_destroy(se);
|
|
}
|
|
fuse_unmount(mountpoint, ch);
|
|
}
|
|
fuse_opt_free_args(&args);
|
|
}
|