--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:4; indent-tabs-mode:t -*-
+// vim: ts=8 sw=4 smarttab
+
+/*
+ FUSE: Filesystem in Userspace
+ Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU GPL.
+ See the file COPYING.
+
+ gcc -Wall `pkg-config fuse --cflags --libs` -lulockmgr fusexmp_fh.c -o fusexmp_fh
+*/
+
+#define FUSE_USE_VERSION 30
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+
+#include <fuse/fuse_lowlevel.h>
+#include <ulockmgr.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <errno.h>
+#include <sys/time.h>
+#ifdef HAVE_SETXATTR
+#include <sys/xattr.h>
+#endif
+#include <time.h>
+
+
+#include "include/unordered_map.h"
+#include "include/hash_namespace.h"
+
+#ifndef __LP64__
+CEPH_HASH_NAMESPACE_START
+ template<> struct hash<uint64_t> {
+ size_t operator()(uint64_t __x) const {
+ static hash<uint32_t> H;
+ return H((__x >> 32) ^ (__x & 0xffffffff));
+ }
+ };
+CEPH_HASH_NAMESPACE_END
+#endif
+
+
+#include <iostream>
+#include <fstream>
+#include <map>
+#include <set>
+using namespace std;
+
+#include "common/Mutex.h"
+
+Mutex trace_lock;
+ofstream tracefile;
+
+#define traceout (tracefile.is_open() ? tracefile : cout)
+
+char *basedir = 0;
+int debug = 0;
+bool do_timestamps = true;
+
+#define dout if (debug) cout
+
+Mutex lock;
+
+struct Inode {
+ struct stat stbuf;
+ int ref;
+ set<int> fds;
+
+ map<pair<string,ino_t>,Inode*> parents;
+
+ // if dir,
+ map<string,Inode*> dentries;
+
+ Inode() : ref(0) {}
+
+ Inode *lookup(const string& dname) {
+ if (dentries.count(dname))
+ return dentries[dname];
+ return 0;
+ }
+};
+
+Inode *root = 0;
+ceph::unordered_map<ino_t, Inode*> inode_map;
+
+bool make_inode_path(string &buf, Inode *in)
+{
+ if (!in->parents.empty()) {
+ if (!make_inode_path(buf, in->parents.begin()->second))
+ return false;
+ buf += "/";
+ buf += in->parents.begin()->first.first;
+ } else {
+ if (in != root) return false;
+ assert(in->stbuf.st_ino == 1);
+ buf = basedir;
+ buf += "/";
+ }
+ return true;
+ //dout << "path: " << in->stbuf.st_ino << " -> " << buf << endl;
+}
+
+bool make_inode_path(string &buf, Inode *in, const char *name)
+{
+ if (!make_inode_path(buf, in)) return false;
+ buf += "/";
+ buf += name;
+ return true;
+}
+
+bool make_ino_path(string &buf, ino_t ino)
+{
+ Inode *in = inode_map[ino];
+ assert(in);
+ return make_inode_path(buf, in);
+}
+
+bool make_ino_path(string &buf, ino_t ino, const char *name)
+{
+ Inode *in = inode_map[ino];
+ assert(in);
+ if (!make_inode_path(buf, in))
+ return false;
+ buf += "/";
+ buf += name;
+ return true;
+}
+
+void remove_dentry(Inode *pin, const string& dname)
+{
+ dout << "remove_dentry " << pin->stbuf.st_ino << " " << dname << endl;
+
+ Inode *in = pin->lookup(dname);
+ assert(in);
+ pin->dentries.erase(dname);
+ in->parents.erase(pair<string,ino_t>(dname,pin->stbuf.st_ino));
+
+ dout << "remove_dentry " << pin->stbuf.st_ino << " " << dname
+ << " ... inode " << in->stbuf.st_ino << " ref " << in->ref
+ << endl;
+}
+
+void add_dentry(Inode *parent, const string& dname, Inode *in)
+{
+ dout << "add_dentry " << parent->stbuf.st_ino << " " << dname << " to " << in->stbuf.st_ino << endl;
+
+ if (parent->dentries.count(dname))
+ remove_dentry(parent, dname); // e.g., when renaming over another file..
+
+ parent->dentries[dname] = in;
+ in->parents[pair<string,ino_t>(dname,parent->stbuf.st_ino)] = parent;
+}
+
+void unlink_inode(Inode *in)
+{
+ dout << "unlink_inode " << in->stbuf.st_ino << " ref " << in->ref << endl;
+
+ // remove parent links
+ while (!in->parents.empty()) {
+ Inode *parent = in->parents.begin()->second;
+ string dname = in->parents.begin()->first.first;
+ remove_dentry(parent, dname);
+ }
+
+ // remove children
+ while (!in->dentries.empty())
+ remove_dentry(in, in->dentries.begin()->first);
+
+ while (!in->fds.empty()) {
+ int fd = *in->fds.begin();
+ ::close(fd);
+ in->fds.erase(in->fds.begin());
+ dout << "remove_inode closeing stray fd " << fd << endl;
+ }
+}
+
+void remove_inode(Inode *in)
+{
+ dout << "remove_inode " << in->stbuf.st_ino << " ref " << in->ref << endl;
+
+ unlink_inode(in);
+
+ inode_map.erase(in->stbuf.st_ino);
+ dout << "remove_inode " << in->stbuf.st_ino << " done" << endl;
+ delete in;
+}
+
+Inode *add_inode(Inode *parent, const char *name, struct stat *attr)
+{
+ dout << "add_inode " << parent->stbuf.st_ino << " " << name << " " << attr->st_ino << endl;
+
+ Inode *in;
+ if (inode_map.count(attr->st_ino)) {
+ // reuse inode
+ in = inode_map[attr->st_ino];
+ unlink_inode(in); // hrm.. should this close open fds? probably.
+ dout << "** REUSING INODE **" << endl;
+ } else {
+ inode_map[attr->st_ino] = in = new Inode;
+ }
+ memcpy(&in->stbuf, attr, sizeof(*attr));
+
+ string dname(name);
+ add_dentry(parent, dname, in);
+
+ return in;
+}
+
+
+void print_time()
+{
+ if (do_timestamps) {
+ struct timeval tv;
+ gettimeofday(&tv, 0);
+ traceout << "@" << endl
+ << tv.tv_sec << endl
+ << tv.tv_usec << endl;
+ }
+}
+
+
+bool has_perm(int mask, Inode *in, int uid, int gid)
+{
+ dout << "hash_perm " << uid << "." << gid << " " << oct << mask << " in " << in->stbuf.st_mode
+ << " " << in->stbuf.st_uid << "." << in->stbuf.st_gid << endl;
+ if (in->stbuf.st_mode & mask) return true;
+ if (in->stbuf.st_gid == gid && in->stbuf.st_mode & (mask << 3)) return true;
+ if (in->stbuf.st_uid == uid && in->stbuf.st_mode & (mask << 6)) return true;
+ return false;
+}
+
+
+static void ft_ll_lookup(fuse_req_t req, fuse_ino_t pino, const char *name)
+{
+ int res = 0;
+
+ //dout << "lookup " << pino << " " << name << endl;
+
+ struct fuse_entry_param fe;
+ memset(&fe, 0, sizeof(fe));
+
+ lock.Lock();
+ Inode *parent = inode_map[pino];
+ assert(parent);
+
+ // check permissions
+
+ string dname(name);
+ string path;
+ Inode *in = 0;
+ if (!has_perm(0001, parent, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid)) {
+ res = EPERM;
+ }
+ else if (!make_inode_path(path, parent, name)) {
+ res = ENOENT;
+ } else {
+ in = parent->lookup(dname);
+ if (in && res == 0) {
+ // re-stat, for good measure
+ res = ::lstat(path.c_str(), &in->stbuf);
+
+ // hrm!
+ if (res != 0) {
+ dout << "** WEIRD ** lookup on " << pino << " " << name << " inode went away!" << endl;
+ in = 0;
+ res = errno;
+ }
+
+ //dout << "have " << in->stbuf.st_ino << endl;
+ } else {
+ in = new Inode;
+ res = ::lstat(path.c_str(), &in->stbuf);
+ //dout << "stat " << path << " res = " << res << endl;
+ if (res == 0) {
+ inode_map[in->stbuf.st_ino] = in;
+ add_dentry(parent, dname, in);
+ } else {
+ delete in;
+ in = 0;
+ res = errno;
+ }
+ }
+ if (in) {
+ in->ref++;
+ fe.ino = in->stbuf.st_ino;
+ memcpy(&fe.attr, &in->stbuf, sizeof(in->stbuf));
+ }
+ }
+ lock.Unlock();
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_lookup" << endl << pino << endl << name << endl << fe.attr.st_ino << endl;
+ trace_lock.Unlock();
+
+ if (in)
+ fuse_reply_entry(req, &fe);
+ else
+ fuse_reply_err(req, res);
+}
+
+static void ft_ll_forget(fuse_req_t req, fuse_ino_t ino, long unsigned nlookup)
+{
+ if (ino != 1) {
+ lock.Lock();
+ Inode *in = inode_map[ino];
+ if (in) {
+ dout << "forget on " << ino << " ref " << in->ref << ", forget " << nlookup << endl;
+ if (in->ref < nlookup)
+ dout << "**** BAD **** forget on " << ino << " ref " << in->ref << ", forget " << nlookup << endl;
+
+ in->ref -= nlookup;
+ if (in->ref <= 0)
+ remove_inode(in);
+ } else {
+ dout << "**** BAD **** forget " << nlookup << " on nonexistent inode " << ino << endl;
+ }
+ lock.Unlock();
+ }
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_forget" << endl << ino << endl << nlookup << endl;
+ trace_lock.Unlock();
+
+ fuse_reply_none(req);
+}
+
+static void ft_ll_getattr(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
+{
+ int res = 0;
+ string path;
+ int fd = 0;
+
+ Inode *in = 0;
+ struct stat attr;
+
+ lock.Lock();
+ in = inode_map[ino];
+ if (in->fds.empty()) {
+ if (!make_inode_path(path, in))
+ res = ENOENT;
+ } else
+ fd = *in->fds.begin();
+ lock.Unlock();
+
+ if (fd > 0) {
+ res = ::fstat(fd, &attr);
+ dout << "getattr fstat on fd " << fd << " res " << res << endl;
+ } else if (res == 0) {
+ res = ::lstat(path.c_str(), &attr);
+ dout << "getattr lstat on " << path << " res " << res << endl;
+ }
+ if (res < 0) res = errno;
+ if (ino == 1) attr.st_ino = 1;
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_getattr" << endl << ino << endl;
+ trace_lock.Unlock();
+
+ if (res == 0) {
+ lock.Lock();
+ memcpy(&in->stbuf, &attr, sizeof(attr));
+ lock.Unlock();
+ fuse_reply_attr(req, &attr, 0);
+ } else
+ fuse_reply_err(req, res);
+}
+
+static void ft_ll_setattr(fuse_req_t req, fuse_ino_t ino, struct stat *attr,
+ int to_set, struct fuse_file_info *fi)
+{
+ string path;
+ Inode *in = 0;
+ int fd = 0;
+ int res = 0;
+
+ lock.Lock();
+ in = inode_map[ino];
+ if (in->fds.empty() || (to_set & FUSE_SET_ATTR_MTIME)) {
+ if (!make_inode_path(path, in))
+ res = ENOENT;
+ } else
+ fd = *in->fds.begin();
+ lock.Unlock();
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_setattr" << endl << ino << endl;
+ traceout << attr->st_mode << endl;
+ traceout << attr->st_uid << endl << attr->st_gid << endl;
+ traceout << attr->st_size << endl;
+ traceout << attr->st_mtime << endl;
+ traceout << attr->st_atime << endl;
+ traceout << to_set << endl;
+ trace_lock.Unlock();
+
+ if (res == 0 && !has_perm(0010, in, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid)) {
+ res = EPERM;
+ } else if (res == 0) {
+ if (to_set & FUSE_SET_ATTR_MODE) {
+ if (fd > 0)
+ res = ::fchmod(fd, attr->st_mode);
+ else
+ res = ::chmod(path.c_str(), attr->st_mode);
+ }
+ if (!res && to_set & FUSE_SET_ATTR_UID) {
+ if (fd > 0)
+ res = ::fchown(fd, attr->st_uid, attr->st_gid);
+ else
+ res = ::chown(path.c_str(), attr->st_uid, attr->st_gid);
+ }
+ if (!res && to_set & FUSE_SET_ATTR_SIZE) {
+ if (fd > 0)
+ res = ::ftruncate(fd, attr->st_size);
+ else
+ res = ::truncate(path.c_str(), attr->st_size);
+ }
+ if (!res && to_set & FUSE_SET_ATTR_MTIME) {
+ struct utimbuf ut;
+ ut.actime = attr->st_atime;
+ ut.modtime = attr->st_mtime;
+ res = ::utime(path.c_str(), &ut);
+ }
+ if (res < 0) res = errno;
+ }
+
+ if (res == 0) {
+ lock.Lock();
+ ::lstat(path.c_str(), &in->stbuf);
+ if (ino == 1) in->stbuf.st_ino = 1;
+ memcpy(attr, &in->stbuf, sizeof(*attr));
+ lock.Unlock();
+ fuse_reply_attr(req, attr, 0);
+ } else
+ fuse_reply_err(req, res);
+}
+
+
+static void ft_ll_readlink(fuse_req_t req, fuse_ino_t ino)
+{
+ string path;
+ int res = 0;
+
+ lock.Lock();
+ if (!make_ino_path(path, ino))
+ res = ENOENT;
+ lock.Unlock();
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_readlink" << endl << ino << endl;
+ trace_lock.Unlock();
+
+ char buf[256];
+ if (res == 0) res = readlink(path.c_str(), buf, 255);
+ if (res < 0) res = errno;
+
+ if (res >= 0) {
+ buf[res] = 0;
+ fuse_reply_readlink(req, buf);
+ } else {
+ fuse_reply_err(req, res);
+ }
+}
+
+
+static void ft_ll_opendir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
+{
+ string path;
+ int res = 0;
+ lock.Lock();
+ Inode *in = inode_map[ino];
+ if (!make_inode_path(path, in))
+ res = ENOENT;
+ lock.Unlock();
+
+ DIR *dir = 0;
+ if (res == 0 && !has_perm(0100, in, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else if (res == 0) dir = opendir(path.c_str());
+ if (res < 0) res = errno;
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_opendir" << endl << ino << endl << (unsigned long)dir << endl;
+ trace_lock.Unlock();
+
+ if (dir) {
+ fi->fh = (long)dir;
+ fuse_reply_open(req, fi);
+ } else
+ fuse_reply_err(req, res);
+}
+
+static void ft_ll_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
+ off_t off, struct fuse_file_info *fi)
+{
+ struct dirent *de;
+ DIR *dp = (DIR*)fi->fh;
+
+ // buffer
+ char *buf;
+ size_t pos = 0;
+
+ buf = new char[size];
+ if (!buf) {
+ fuse_reply_err(req, ENOMEM);
+ return;
+ }
+
+ seekdir(dp, off);
+ while ((de = readdir(dp)) != NULL) {
+ struct stat st;
+ memset(&st, 0, sizeof(st));
+ st.st_ino = de->d_ino;
+ st.st_mode = de->d_type << 12;
+
+ size_t entrysize = fuse_add_direntry(req, buf + pos, size - pos,
+ de->d_name, &st, telldir(dp));
+ if (entrysize > size - pos)
+ break; // didn't fit, done for now.
+ pos += entrysize;
+ }
+
+ fuse_reply_buf(req, buf, pos);
+ delete[] buf;
+}
+
+static void ft_ll_releasedir(fuse_req_t req, fuse_ino_t ino,
+ struct fuse_file_info *fi)
+{
+ DIR *dir = (DIR*)fi->fh;
+
+ trace_lock.Lock();
+ print_time();
+ traceout << "ll_releasedir" << endl << (unsigned long)dir << endl;
+ trace_lock.Unlock();
+
+ closedir(dir);
+ fuse_reply_err(req, 0);
+}
+
+
+
+static void ft_ll_mknod(fuse_req_t req, fuse_ino_t parent, const char *name,
+ mode_t mode, dev_t rdev)
+{
+ 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 << "mknod " << path << endl;
+ if (res == 0 && !has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else if (res == 0) res = ::mknod(path.c_str(), mode, rdev);
+ if (res < 0)
+ res = errno;
+ else
+ ::chown(path.c_str(), fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid);
+
+ 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 && !has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else if (res == 0) res = ::mkdir(path.c_str(), mode);
+ if (res < 0)
+ res = errno;
+ else
+ ::chown(path.c_str(), fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid);
+
+ 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 && !has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else if (res == 0) res = ::symlink(value, path.c_str());
+ if (res < 0)
+ res = errno;
+ else
+ ::chown(path.c_str(), fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid);
+
+ 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 && !has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else if (res == 0) {
+ fd = ::open(path.c_str(), fi->flags|O_CREAT, mode);
+ if (fd < 0) {
+ res = errno;
+ } else {
+ ::fchown(fd, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid);
+ }
+ }
+
+ 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 && !has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else 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 && !has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else 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 && (!has_perm(0010, pin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid) ||
+ !has_perm(0010, newpin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid)))
+ res = EPERM;
+ else 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 && (!has_perm(0010, in, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid) ||
+ !has_perm(0010, newpin, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid)))
+ res = EPERM;
+ else 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 want = 0100;
+ if (fi->flags & O_RDWR) want |= 0010;
+ if (fi->flags == O_WRONLY) want = 0010;
+
+ int fd = 0;
+ if (res == 0 && !has_perm(want, in, fuse_req_ctx(req)->uid, fuse_req_ctx(req)->gid))
+ res = EPERM;
+ else 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 (res == 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";
+ // newargv[newargc++] = "-o";
+ // newargv[newargc++] = "default_permissions";
+ 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;
+
+ 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);
+ if (fuse_session_loop(se) <= -1) {
+ cout << "Failed fuse_session_loop() call." << endl;
+ return 1;
+ }
+ fuse_remove_signal_handlers(se);
+ fuse_session_remove_chan(ch);
+ }
+ fuse_session_destroy(se);
+ }
+ fuse_unmount(mountpoint, ch);
+ }
+ fuse_opt_free_args(&args);
+}
Code Review / stor4nfv.git / blobdiff