[Reproducible-commits] [disorderfs] 01/01: Initial commit
Andrew Ayer
agwa at andrewayer.name
Fri Aug 21 19:02:34 UTC 2015
This is an automated email from the git hooks/post-receive script.
agwa-guest pushed a commit to branch master
in repository disorderfs.
commit a9c0aeb3421c1c2076fd304d94c20877f1214819
Author: Andrew Ayer <agwa at andrewayer.name>
Date: Fri Aug 21 20:27:24 2015 +0200
Initial commit
---
.gitignore | 3 +
COPYING | 674 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
Makefile | 99 ++++++++
README | 8 +
disorderfs.1.txt | 53 +++++
disorderfs.cpp | 306 +++++++++++++++++++++++++
6 files changed, 1143 insertions(+)
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d2b4843
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.o
+/disorderfs
+/disorderfs.1
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
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+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..fda0dfe
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,99 @@
+#
+# Copyright 2015 Andrew Ayer
+#
+# This file is part of disorderfs.
+#
+# disorderfs is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# disorderfs is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with disorderfs. If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Note: uses GNU Make features
+
+CXXFLAGS ?= -Wall -Wextra -pedantic -O2
+PREFIX ?= /usr/local
+BINDIR ?= $(PREFIX)/bin
+MANDIR ?= $(PREFIX)/share/man
+ENABLE_MAN ?= $(HAS_A2X)
+
+# a2x
+HAS_A2X ?= $(shell command -v a2x >/dev/null && echo yes || echo no)
+
+# FUSE
+FUSE_CFLAGS ?= $(shell pkg-config --cflags fuse) -DFUSE_USE_VERSION=26
+FUSE_LIBS ?= $(shell pkg-config --libs fuse)
+
+# CXXFLAGS
+CXXFLAGS += -std=c++11 -Wno-unused-parameter
+CXXFLAGS += $(FUSE_CFLAGS)
+
+# Files
+OBJFILES = disorderfs.o
+
+all: build
+
+#
+# Build
+#
+BUILD_MAN_TARGETS-yes = build-man
+BUILD_MAN_TARGETS-no =
+BUILD_TARGETS := build-bin $(BUILD_MAN_TARGETS-$(ENABLE_MAN))
+
+build: $(BUILD_TARGETS)
+
+build-bin: disorderfs
+
+disorderfs: $(OBJFILES)
+ $(CXX) $(CXXFLAGS) -o $@ $(OBJFILES) $(LDFLAGS) $(FUSE_LIBS)
+
+build-man: disorderfs.1
+
+disorderfs.1: disorderfs.1.txt
+ a2x --doctype manpage --format manpage disorderfs.1.txt
+
+#
+# Clean
+#
+CLEAN_MAN_TARGETS-yes = clean-man
+CLEAN_MAN_TARGETS-no =
+CLEAN_TARGETS := clean-bin $(CLEAN_MAN_TARGETS-$(ENABLE_MAN))
+
+clean: $(CLEAN_TARGETS)
+
+clean-bin:
+ rm -f $(OBJFILES) disorderfs
+
+clean-man:
+ rm -f disorderfs.1
+
+
+#
+# Install
+#
+INSTALL_MAN_TARGETS-yes = install-man
+INSTALL_MAN_TARGETS-no =
+INSTALL_TARGETS := install-bin $(INSTALL_MAN_TARGETS-$(ENABLE_MAN))
+
+install: $(INSTALL_TARGETS)
+
+install-bin: build-bin
+ install -d $(DESTDIR)$(BINDIR)
+ install -m 755 disorderfs $(DESTDIR)$(BINDIR)/
+
+install-man: build-man
+ install -d $(DESTDIR)$(MANDIR)/man1
+ install -m 644 disorderfs.1 $(DESTDIR)$(MANDIR)/man1/
+
+.PHONY: all \
+ build build-bin build-man \
+ clean clean-bin clean-man \
+ install install-bin install-man
diff --git a/README b/README
new file mode 100644
index 0000000..8a5d710
--- /dev/null
+++ b/README
@@ -0,0 +1,8 @@
+disorderfs - FUSE filesystem that introduces non-determinism
+
+disorderfs is an overlay FUSE filesystem that introduces non-determinism
+into filesystem metadata. For example, it can randomize the order
+in which directory entries are read. This is useful for detecting
+non-determinism in the build process.
+
+See the man page for details.
diff --git a/disorderfs.1.txt b/disorderfs.1.txt
new file mode 100644
index 0000000..99f85aa
--- /dev/null
+++ b/disorderfs.1.txt
@@ -0,0 +1,53 @@
+DISORDERFS(1)
+=============
+:doctype: manpage
+:revdate: 2015-08-21
+
+NAME
+----
+disorderfs - FUSE filesystem that introduces non-determinism
+
+
+SYNOPSIS
+--------
+*disorderfs* ['OPTIONS'...] 'ROOTDIR' 'MOUNTPOINT'
+
+
+DESCRIPTION
+-----------
+*disorderfs* is an overlay FUSE filesystem that introduces non-determinism
+into filesystem metadata. For example, it can randomize the order
+in which directory entries are read. This is useful for detecting
+non-determinism in the build process.
+
+'ROOTDIR' is the underlying directory that is to be mirrored, and 'MOUNTPOINT' is
+where the overlay should be mounted.
+
+
+OPTIONS
+-------
+See fusermount(1), mount.fuse(8), and mount(8) for a full list of options.
+
+Options specific to *disorderfs*:
+
+*--help*, *-h*::
+ Display help.
+
+*--version*, *-V*::
+ Display the version.
+
+
+BUGS
+----
+Errors from close are not properly reported.
+
+fsync is not implemented.
+
+xattrs are not implemented.
+
+Locks are not propagated to the underlying filesystem.
+
+
+AUTHOR
+------
+Andrew Ayer <agwa at andrewayer.name>
diff --git a/disorderfs.cpp b/disorderfs.cpp
new file mode 100644
index 0000000..680fc84
--- /dev/null
+++ b/disorderfs.cpp
@@ -0,0 +1,306 @@
+/*
+ * Copyright 2015 Andrew Ayer
+ *
+ * This file is part of disorderfs.
+ *
+ * disorderfs is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * disorderfs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with disorderfs. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <cstdlib>
+#include <ctime>
+#include <cstring>
+#include <string>
+#include <fstream>
+#include <fuse.h>
+#include <dirent.h>
+#include <iostream>
+#include <memory>
+#include <signal.h>
+#include <sstream>
+#include <unistd.h>
+#include <errno.h>
+#include <vector>
+#include <random>
+#include <algorithm>
+#include <attr/xattr.h>
+#include <sys/types.h>
+
+#define DISORDERFS_VERSION "0.1.0"
+
+namespace {
+ std::vector<std::string> bare_arguments;
+ std::string root;
+ // TODO: cmdline opts for these:
+ bool shuffle_dirents{true};
+ bool reverse_dirents{false};
+ bool randomize_block_count{false};
+
+ int wrap (int retval) { return retval == -1 ? -errno : 0; }
+ using Dirents = std::vector<std::string>;
+
+ struct fuse_operations disorderfs_fuse_operations;
+ enum {
+ KEY_HELP,
+ KEY_VERSION
+ };
+ const struct fuse_opt disorderfs_fuse_opts[] = {
+ FUSE_OPT_KEY("-h", KEY_HELP),
+ FUSE_OPT_KEY("--help", KEY_HELP),
+ FUSE_OPT_KEY("-V", KEY_VERSION),
+ FUSE_OPT_KEY("--version", KEY_VERSION),
+ FUSE_OPT_END
+ };
+ int fuse_opt_proc (void* data, const char* arg, int key, struct fuse_args* outargs)
+ {
+ if (key == FUSE_OPT_KEY_NONOPT) {
+ bare_arguments.emplace_back(arg);
+ return 0;
+ } else if (key == KEY_HELP) {
+ std::clog << "Usage: disorderfs [OPTIONS] ROOTDIR MOUNTPOINT" << std::endl;
+ std::clog << "General options:" << std::endl;
+ std::clog << " -o opt,[opt...] mount options (see below)" << std::endl;
+ std::clog << " -h, --help display help" << std::endl;
+ std::clog << " -V, --version display version info" << std::endl;
+ std::clog << std::endl;
+ fuse_opt_add_arg(outargs, "-ho");
+ fuse_main(outargs->argc, outargs->argv, &disorderfs_fuse_operations, NULL);
+ std::exit(0);
+ } else if (key == KEY_VERSION) {
+ std::cout << "disorderfs version: " DISORDERFS_VERSION << std::endl;
+ fuse_opt_add_arg(outargs, "--version");
+ fuse_main(outargs->argc, outargs->argv, &disorderfs_fuse_operations, NULL);
+ std::exit(0);
+ }
+ return 1;
+ }
+}
+
+int main (int argc, char** argv)
+{
+ signal(SIGPIPE, SIG_IGN);
+
+ /*
+ * Initialize disorderfs_fuse_operations
+ */
+ std::memset(&disorderfs_fuse_operations, '\0', sizeof(disorderfs_fuse_operations));
+
+ disorderfs_fuse_operations.getattr = [] (const char* path, struct stat* st) -> int {
+ if (lstat((root + path).c_str(), st) == -1) {
+ return -errno;
+ }
+ if (randomize_block_count) {
+ // TODO: also randomize blocks st->st_blocks = 129381;
+ }
+ return 0;
+ };
+ disorderfs_fuse_operations.readlink = [] (const char* path, char* buf, size_t sz) -> int {
+ const ssize_t len{readlink((root + path).c_str(), buf, sz - 1)}; // sz > 0, since it includes space for null terminator
+ if (len == -1) {
+ return -errno;
+ }
+ buf[len] = '\0';
+ return 0;
+ };
+ disorderfs_fuse_operations.mknod = [] (const char* path, mode_t mode, dev_t dev) -> int {
+ return wrap(mknod((root + path).c_str(), mode, dev));
+ };
+ disorderfs_fuse_operations.mkdir = [] (const char* path, mode_t mode) -> int {
+ return wrap(mkdir((root + path).c_str(), mode));
+ };
+ disorderfs_fuse_operations.unlink = [] (const char* path) -> int {
+ return wrap(unlink((root + path).c_str()));
+ };
+ disorderfs_fuse_operations.rmdir = [] (const char* path) -> int {
+ return wrap(rmdir((root + path).c_str()));
+ };
+ disorderfs_fuse_operations.symlink = [] (const char* target, const char* linkpath) -> int {
+ return wrap(symlink(target, (root + linkpath).c_str()));
+ };
+ disorderfs_fuse_operations.rename = [] (const char* oldpath, const char* newpath) -> int {
+ return wrap(rename((root + oldpath).c_str(), (root + newpath).c_str()));
+ };
+ disorderfs_fuse_operations.link = [] (const char* oldpath, const char* newpath) -> int {
+ return wrap(link((root + oldpath).c_str(), (root + newpath).c_str()));
+ };
+ disorderfs_fuse_operations.chmod = [] (const char* path, mode_t mode) -> int {
+ return wrap(chmod((root + path).c_str(), mode));
+ };
+ disorderfs_fuse_operations.chown = [] (const char* path, uid_t uid, gid_t gid) -> int {
+ return wrap(lchown((root + path).c_str(), uid, gid));
+ };
+ disorderfs_fuse_operations.truncate = [] (const char* path, off_t length) -> int {
+ return wrap(truncate((root + path).c_str(), length));
+ };
+ disorderfs_fuse_operations.open = [] (const char* path, struct fuse_file_info* info) -> int {
+ const int fd{open((root + path).c_str(), info->flags)};
+ if (fd == -1) {
+ return -errno;
+ }
+ info->fh = fd;
+ return 0;
+ };
+ disorderfs_fuse_operations.read = [] (const char* path, char* buf, size_t sz, off_t off, struct fuse_file_info* info) -> int {
+ return pread(info->fh, buf, sz, off);
+ };
+ disorderfs_fuse_operations.write = [] (const char* path, const char* buf, size_t sz, off_t off, struct fuse_file_info* info) -> int {
+ return pwrite(info->fh, buf, sz, off);
+ };
+ disorderfs_fuse_operations.statfs = [] (const char* path, struct statvfs* f) -> int {
+ return wrap(statvfs((root + path).c_str(), f));
+ };
+ /* TODO: flush
+ disorderfs_fuse_operations.flush = [] (const char* path, struct fuse_file_info* info) -> int {
+ };
+ */
+ disorderfs_fuse_operations.release = [] (const char* path, struct fuse_file_info* info) -> int {
+ close(info->fh);
+ return 0; // return value is ignored
+ };
+ /* TODO: fsync
+ disorderfs_fuse_operations.fsync = [] (const char* path, int datasync, struct fuse_file_info* info) -> int {
+ };
+ */
+ /* TODO: xattrs
+ disorderfs_fuse_operations.setxattr = [] (const char *, const char *, const char *, size_t, int) -> int {
+ };
+ disorderfs_fuse_operations.getxattr = [] (const char *, const char *, char *, size_t) -> int {
+ };
+ disorderfs_fuse_operations.listxattr = [] (const char *, char *, size_t) -> int {
+ };
+ disorderfs_fuse_operations.removexattr = [] (const char *, const char *) -> int {
+ };
+ */
+ disorderfs_fuse_operations.opendir = [] (const char* path, struct fuse_file_info* info) -> int {
+ std::unique_ptr<Dirents> dirents{new Dirents};
+
+ DIR* d = opendir((root + path).c_str());
+ if (!d) {
+ return -errno;
+ }
+ struct dirent dirent_storage;
+ struct dirent* dirent_p;
+ int res;
+ while ((res = readdir_r(d, &dirent_storage, &dirent_p)) == 0 && dirent_p) {
+ dirents->emplace_back(dirent_p->d_name);
+ }
+ if (reverse_dirents) {
+ std::reverse(dirents->begin(), dirents->end());
+ }
+ closedir(d);
+ if (res != 0) {
+ return -res;
+ }
+
+ info->fh = reinterpret_cast<uint64_t>(dirents.release());
+ return 0;
+ };
+ disorderfs_fuse_operations.readdir = [] (const char* path, void* buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info* info) {
+ Dirents& dirents = *reinterpret_cast<Dirents*>(info->fh);
+ if (shuffle_dirents) {
+ std::random_device rd;
+ std::mt19937 g(rd());
+ std::shuffle(dirents.begin(), dirents.end(), g);
+ }
+
+ for (const std::string& dirent : dirents) {
+ if (filler(buf, dirent.c_str(), nullptr, 0) != 0) {
+ return -ENOMEM;
+ }
+ }
+ return 0;
+ };
+ disorderfs_fuse_operations.releasedir = [] (const char* path, struct fuse_file_info* info) -> int {
+ delete reinterpret_cast<Dirents*>(info->fh);
+ return 0;
+ };
+ /* TODO: fsyncdir
+ disorderfs_fuse_operations.fsyncdir = [] (const char* path, int datasync, struct fuse_file_info* info) -> int {
+ };
+ */
+ disorderfs_fuse_operations.access = [] (const char* path, int mode) -> int {
+ return wrap(access((root + path).c_str(), mode));
+ };
+ disorderfs_fuse_operations.create = [] (const char* path, mode_t mode, struct fuse_file_info* info) -> int {
+ // XXX: use info->flags?
+ const int fd{open((root + path).c_str(), info->flags | O_CREAT, mode)};
+ if (fd == -1) {
+ return -errno;
+ }
+ info->fh = fd;
+ return 0;
+ };
+ disorderfs_fuse_operations.ftruncate = [] (const char* path, off_t off, struct fuse_file_info* info) -> int {
+ return wrap(ftruncate(info->fh, off));
+ };
+ disorderfs_fuse_operations.fgetattr = [] (const char* path, struct stat* st, struct fuse_file_info* info) -> int {
+ if (fstat(info->fh, st) == -1) {
+ return -errno;
+ }
+ if (randomize_block_count) {
+ // TODO: also randomize blocks st->st_blocks = 129381;
+ }
+ return 0;
+ };
+ /* TODO: locking
+ disorderfs_fuse_operations.loc = [] (const char *, struct fuse_file_info *, int cmd, struct flock *) -> int {
+ };
+ disorderfs_fuse_operations.flock = [] (const char *, struct fuse_file_info *, int op) -> int {
+ };
+ */
+ disorderfs_fuse_operations.utimens = [] (const char* path, const struct timespec tv[2]) -> int {
+ return wrap(utimensat(AT_FDCWD, (root + path).c_str(), tv, AT_SYMLINK_NOFOLLOW));
+ };
+ /* Not applicable?
+ disorderfs_fuse_operations.bmap = [] (const char *, size_t blocksize, uint64_t *idx) -> int {
+ };
+ */
+ /* Not needed?
+ disorderfs_fuse_operations.ioctl = [] (const char *, int cmd, void *arg, struct fuse_file_info *, unsigned int flags, void *data) -> int {
+ };
+ */
+ /* ???
+ disorderfs_fuse_operations.poll = [] (const char *, struct fuse_file_info *, struct fuse_pollhandle *ph, unsigned *reventsp) -> int {
+ };
+ */
+ /* TODO: implement these, for efficiency
+ disorderfs_fuse_operations.write_buf = [] (const char *, struct fuse_bufvec *buf, off_t off, struct fuse_file_info *) -> int {
+ };
+ disorderfs_fuse_operations.read_buf = [] (const char *, struct fuse_bufvec **bufp, size_t size, off_t off, struct fuse_file_info *) -> int {
+ };
+ */
+ disorderfs_fuse_operations.fallocate = [] (const char* path, int mode, off_t off, off_t len, struct fuse_file_info* info) -> int {
+ return wrap(fallocate(info->fh, mode, off, len));
+ };
+
+ /*
+ * Parse command line options
+ */
+ struct fuse_args fargs = FUSE_ARGS_INIT(argc, argv);
+ fuse_opt_parse(&fargs, nullptr, disorderfs_fuse_opts, fuse_opt_proc);
+
+ if (bare_arguments.size() != 2) {
+ std::clog << "disorderfs: error: wrong number of arguments" << std::endl;
+ std::clog << "Usage: disorderfs [OPTIONS] ROOTDIR MOUNTPOINT" << std::endl;
+ return 2;
+ }
+
+ root = bare_arguments[0];
+
+ // Add some of our own hard-coded FUSE options:
+ fuse_opt_add_arg(&fargs, "-o");
+ fuse_opt_add_arg(&fargs, "direct_io,atomic_o_trunc"); // XXX: other mount options?
+ fuse_opt_add_arg(&fargs, bare_arguments[1].c_str());
+
+ return fuse_main(fargs.argc, fargs.argv, &disorderfs_fuse_operations, nullptr);
+}
--
Alioth's /usr/local/bin/git-commit-notice on /srv/git.debian.org/git/reproducible/disorderfs.git
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