commit 95a9f56f6448de1bdb8b850c0870a453627e92c7
Author: Olivier 'reivilibre <olivier@librepush.net>
Date:   Sun Jan 16 22:19:27 2022 +0000

    Initial commit in the middle of building up a proof of concept

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+]
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+ "zstd-sys",
+]
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+[[package]]
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..990d651
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[workspace]
+members = [
+    "olivefs",
+    "olivefsd",
+    "olivefs_common",
+# maybe restructure in future;
+#    "olivefs_com_client",
+#    "olivefs_com_server"
+]
diff --git a/book.toml b/book.toml
new file mode 100644
index 0000000..6e210fa
--- /dev/null
+++ b/book.toml
@@ -0,0 +1,15 @@
+[book]
+authors = ["Olivier"]
+language = "en"
+multilingual = false
+src = "docs"
+title = "Olivefs Documentation"
+description = "Documentation for Olivefs (a network file system)"
+
+[output.html]
+default-theme = "rust"
+git-repository-url = "https://bics.ga/reivilibre/olivefs"
+git-repository-icon = "fa-git-alt"
+fold = { enable = true, level = 1 }
+
+# TODO toml highlighting
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
new file mode 100644
index 0000000..25a519c
--- /dev/null
+++ b/docs/SUMMARY.md
@@ -0,0 +1,2 @@
+# Summary
+
diff --git a/olivefs/Cargo.toml b/olivefs/Cargo.toml
new file mode 100644
index 0000000..6f58588
--- /dev/null
+++ b/olivefs/Cargo.toml
@@ -0,0 +1,36 @@
+[package]
+name = "olivefs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+# Robustness
+log = "0.4.14"
+env_logger = "0.9.0"
+anyhow = "1.0.52"
+bare-metrics-recorder = "0.1.0"
+tracing = "0.1.29"
+tracing-futures = { version = "0.2.5", features = ["tokio"] }
+
+# Asynchronous
+tokio = { version = "1.15.0", features = ["full"] }
+
+# Serialisation
+serde = { version = "1.0.133", features = ["derive"] }
+serde_bare = "0.5.0"
+toml = "0.5.8"
+clap = { version = "3.0.7", features = ["derive"] }
+
+# Networking
+quinn = { version = "0.8.0", features = [] }
+
+# Compression and Encryption
+zstd = "0.9.2+zstd.1.5.1"
+sodiumoxide = "0.2.7"
+rcgen = "0.8.14"
+
+# Filesystem
+fuser = "0.10.0"
+libc = "0.2.112"
diff --git a/olivefs/src/filesystem.rs b/olivefs/src/filesystem.rs
new file mode 100644
index 0000000..4dcd700
--- /dev/null
+++ b/olivefs/src/filesystem.rs
@@ -0,0 +1,693 @@
+use std::ffi::OsStr;
+use std::os::raw::c_int;
+use std::path::Path;
+use std::time::SystemTime;
+use fuser::{Filesystem, KernelConfig, ReplyAttr, ReplyBmap, ReplyCreate, ReplyData, ReplyDirectory, ReplyDirectoryPlus, ReplyEmpty, ReplyEntry, ReplyIoctl, ReplyLock, ReplyLseek, ReplyOpen, ReplyStatfs, ReplyWrite, ReplyXattr, Request, TimeOrNow};
+use libc::{ENOSYS, EPERM};
+use log::{warn, debug, info};
+
+pub mod encryption;
+
+
+pub struct OliveFilesystem {
+
+}
+
+impl Filesystem for OliveFilesystem {
+    /// Initialize filesystem.
+    /// Called before any other filesystem method.
+    /// The kernel module connection can be configured using the KernelConfig object
+    fn init(&mut self, _req: &Request<'_>, _config: &mut KernelConfig) -> Result<(), c_int> {
+        Ok(())
+    }
+
+    /// Clean up filesystem.
+    /// Called on filesystem exit.
+    fn destroy(&mut self) {}
+
+    /// Look up a directory entry by name and get its attributes.
+    fn lookup(&mut self, _req: &Request<'_>, parent: u64, name: &OsStr, reply: ReplyEntry) {
+        warn!(
+            "[Not Implemented] lookup(parent: {:#x?}, name {:?})",
+            parent, name
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Forget about an inode.
+    /// The nlookup parameter indicates the number of lookups previously performed on
+    /// this inode. If the filesystem implements inode lifetimes, it is recommended that
+    /// inodes acquire a single reference on each lookup, and lose nlookup references on
+    /// each forget. The filesystem may ignore forget calls, if the inodes don't need to
+    /// have a limited lifetime. On unmount it is not guaranteed, that all referenced
+    /// inodes will receive a forget message.
+    fn forget(&mut self, _req: &Request<'_>, _ino: u64, _nlookup: u64) {}
+
+    ///// Like forget, but take multiple forget requests at once for performance. The default
+    ///// implementation will fallback to forget.
+    // #[cfg(feature = "abi-7-16")]
+    // fn batch_forget(&mut self, req: &Request<'_>, nodes: &[fuse_forget_one]) {
+    //     for node in nodes {
+    //         self.forget(req, node.nodeid, node.nlookup);
+    //     }
+    // }
+
+    /// Get file attributes.
+    fn getattr(&mut self, _req: &Request<'_>, ino: u64, reply: ReplyAttr) {
+        warn!("[Not Implemented] getattr(ino: {:#x?})", ino);
+        reply.error(ENOSYS);
+    }
+
+    /// Set file attributes.
+    fn setattr(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        mode: Option<u32>,
+        uid: Option<u32>,
+        gid: Option<u32>,
+        size: Option<u64>,
+        _atime: Option<TimeOrNow>,
+        _mtime: Option<TimeOrNow>,
+        _ctime: Option<SystemTime>,
+        fh: Option<u64>,
+        _crtime: Option<SystemTime>,
+        _chgtime: Option<SystemTime>,
+        _bkuptime: Option<SystemTime>,
+        flags: Option<u32>,
+        reply: ReplyAttr,
+    ) {
+        debug!(
+            "[Not Implemented] setattr(ino: {:#x?}, mode: {:?}, uid: {:?}, \
+            gid: {:?}, size: {:?}, fh: {:?}, flags: {:?})",
+            ino, mode, uid, gid, size, fh, flags
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Read symbolic link.
+    fn readlink(&mut self, _req: &Request<'_>, ino: u64, reply: ReplyData) {
+        debug!("[Not Implemented] readlink(ino: {:#x?})", ino);
+        reply.error(ENOSYS);
+    }
+
+    /// Create file node.
+    /// Create a regular file, character device, block device, fifo or socket node.
+    fn mknod(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        mode: u32,
+        umask: u32,
+        rdev: u32,
+        reply: ReplyEntry,
+    ) {
+        debug!(
+            "[Not Implemented] mknod(parent: {:#x?}, name: {:?}, mode: {}, \
+            umask: {:#x?}, rdev: {})",
+            parent, name, mode, umask, rdev
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Create a directory.
+    fn mkdir(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        mode: u32,
+        umask: u32,
+        reply: ReplyEntry,
+    ) {
+        debug!(
+            "[Not Implemented] mkdir(parent: {:#x?}, name: {:?}, mode: {}, umask: {:#x?})",
+            parent, name, mode, umask
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Remove a file.
+    fn unlink(&mut self, _req: &Request<'_>, parent: u64, name: &OsStr, reply: ReplyEmpty) {
+        debug!(
+            "[Not Implemented] unlink(parent: {:#x?}, name: {:?})",
+            parent, name,
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Remove a directory.
+    fn rmdir(&mut self, _req: &Request<'_>, parent: u64, name: &OsStr, reply: ReplyEmpty) {
+        debug!(
+            "[Not Implemented] rmdir(parent: {:#x?}, name: {:?})",
+            parent, name,
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Create a symbolic link.
+    fn symlink(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        link: &Path,
+        reply: ReplyEntry,
+    ) {
+        debug!(
+            "[Not Implemented] symlink(parent: {:#x?}, name: {:?}, link: {:?})",
+            parent, name, link,
+        );
+        reply.error(EPERM);
+    }
+
+    /// Rename a file.
+    fn rename(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        newparent: u64,
+        newname: &OsStr,
+        flags: u32,
+        reply: ReplyEmpty,
+    ) {
+        debug!(
+            "[Not Implemented] rename(parent: {:#x?}, name: {:?}, newparent: {:#x?}, \
+            newname: {:?}, flags: {})",
+            parent, name, newparent, newname, flags,
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Create a hard link.
+    fn link(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        newparent: u64,
+        newname: &OsStr,
+        reply: ReplyEntry,
+    ) {
+        debug!(
+            "[Not Implemented] link(ino: {:#x?}, newparent: {:#x?}, newname: {:?})",
+            ino, newparent, newname
+        );
+        reply.error(EPERM);
+    }
+
+    /// Open a file.
+    /// Open flags (with the exception of O_CREAT, O_EXCL, O_NOCTTY and O_TRUNC) are
+    /// available in flags. Filesystem may store an arbitrary file handle (pointer, index,
+    /// etc) in fh, and use this in other all other file operations (read, write, flush,
+    /// release, fsync). Filesystem may also implement stateless file I/O and not store
+    /// anything in fh. There are also some flags (direct_io, keep_cache) which the
+    /// filesystem may set, to change the way the file is opened. See fuse_file_info
+    /// structure in <fuse_common.h> for more details.
+    fn open(&mut self, _req: &Request<'_>, _ino: u64, _flags: i32, reply: ReplyOpen) {
+        reply.opened(0, 0);
+    }
+
+    /// Read data.
+    /// Read should send exactly the number of bytes requested except on EOF or error,
+    /// otherwise the rest of the data will be substituted with zeroes. An exception to
+    /// this is when the file has been opened in 'direct_io' mode, in which case the
+    /// return value of the read system call will reflect the return value of this
+    /// operation. fh will contain the value set by the open method, or will be undefined
+    /// if the open method didn't set any value.
+    ///
+    /// flags: these are the file flags, such as O_SYNC. Only supported with ABI >= 7.9
+    /// lock_owner: only supported with ABI >= 7.9
+    fn read(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        size: u32,
+        flags: i32,
+        lock_owner: Option<u64>,
+        reply: ReplyData,
+    ) {
+        warn!(
+            "[Not Implemented] read(ino: {:#x?}, fh: {}, offset: {}, size: {}, \
+            flags: {:#x?}, lock_owner: {:?})",
+            ino, fh, offset, size, flags, lock_owner
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Write data.
+    /// Write should return exactly the number of bytes requested except on error. An
+    /// exception to this is when the file has been opened in 'direct_io' mode, in
+    /// which case the return value of the write system call will reflect the return
+    /// value of this operation. fh will contain the value set by the open method, or
+    /// will be undefined if the open method didn't set any value.
+    ///
+    /// write_flags: will contain FUSE_WRITE_CACHE, if this write is from the page cache. If set,
+    /// the pid, uid, gid, and fh may not match the value that would have been sent if write cachin
+    /// is disabled
+    /// flags: these are the file flags, such as O_SYNC. Only supported with ABI >= 7.9
+    /// lock_owner: only supported with ABI >= 7.9
+    fn write(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        data: &[u8],
+        write_flags: u32,
+        flags: i32,
+        lock_owner: Option<u64>,
+        reply: ReplyWrite,
+    ) {
+        debug!(
+            "[Not Implemented] write(ino: {:#x?}, fh: {}, offset: {}, data.len(): {}, \
+            write_flags: {:#x?}, flags: {:#x?}, lock_owner: {:?})",
+            ino,
+            fh,
+            offset,
+            data.len(),
+            write_flags,
+            flags,
+            lock_owner
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Flush method.
+    /// This is called on each close() of the opened file. Since file descriptors can
+    /// be duplicated (dup, dup2, fork), for one open call there may be many flush
+    /// calls. Filesystems shouldn't assume that flush will always be called after some
+    /// writes, or that if will be called at all. fh will contain the value set by the
+    /// open method, or will be undefined if the open method didn't set any value.
+    /// NOTE: the name of the method is misleading, since (unlike fsync) the filesystem
+    /// is not forced to flush pending writes. One reason to flush data, is if the
+    /// filesystem wants to return write errors. If the filesystem supports file locking
+    /// operations (setlk, getlk) it should remove all locks belonging to 'lock_owner'.
+    fn flush(&mut self, _req: &Request<'_>, ino: u64, fh: u64, lock_owner: u64, reply: ReplyEmpty) {
+        debug!(
+            "[Not Implemented] flush(ino: {:#x?}, fh: {}, lock_owner: {:?})",
+            ino, fh, lock_owner
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Release an open file.
+    /// Release is called when there are no more references to an open file: all file
+    /// descriptors are closed and all memory mappings are unmapped. For every open
+    /// call there will be exactly one release call. The filesystem may reply with an
+    /// error, but error values are not returned to close() or munmap() which triggered
+    /// the release. fh will contain the value set by the open method, or will be undefined
+    /// if the open method didn't set any value. flags will contain the same flags as for
+    /// open.
+    fn release(
+        &mut self,
+        _req: &Request<'_>,
+        _ino: u64,
+        _fh: u64,
+        _flags: i32,
+        _lock_owner: Option<u64>,
+        _flush: bool,
+        reply: ReplyEmpty,
+    ) {
+        reply.ok();
+    }
+
+    /// Synchronize file contents.
+    /// If the datasync parameter is non-zero, then only the user data should be flushed,
+    /// not the meta data.
+    fn fsync(&mut self, _req: &Request<'_>, ino: u64, fh: u64, datasync: bool, reply: ReplyEmpty) {
+        debug!(
+            "[Not Implemented] fsync(ino: {:#x?}, fh: {}, datasync: {})",
+            ino, fh, datasync
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Open a directory.
+    /// Filesystem may store an arbitrary file handle (pointer, index, etc) in fh, and
+    /// use this in other all other directory stream operations (readdir, releasedir,
+    /// fsyncdir). Filesystem may also implement stateless directory I/O and not store
+    /// anything in fh, though that makes it impossible to implement standard conforming
+    /// directory stream operations in case the contents of the directory can change
+    /// between opendir and releasedir.
+    fn opendir(&mut self, _req: &Request<'_>, _ino: u64, _flags: i32, reply: ReplyOpen) {
+        reply.opened(0, 0);
+    }
+
+    /// Read directory.
+    /// Send a buffer filled using buffer.fill(), with size not exceeding the
+    /// requested size. Send an empty buffer on end of stream. fh will contain the
+    /// value set by the opendir method, or will be undefined if the opendir method
+    /// didn't set any value.
+    fn readdir(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        reply: ReplyDirectory,
+    ) {
+        warn!(
+            "[Not Implemented] readdir(ino: {:#x?}, fh: {}, offset: {})",
+            ino, fh, offset
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Read directory.
+    /// Send a buffer filled using buffer.fill(), with size not exceeding the
+    /// requested size. Send an empty buffer on end of stream. fh will contain the
+    /// value set by the opendir method, or will be undefined if the opendir method
+    /// didn't set any value.
+    fn readdirplus(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        reply: ReplyDirectoryPlus,
+    ) {
+        debug!(
+            "[Not Implemented] readdirplus(ino: {:#x?}, fh: {}, offset: {})",
+            ino, fh, offset
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Release an open directory.
+    /// For every opendir call there will be exactly one releasedir call. fh will
+    /// contain the value set by the opendir method, or will be undefined if the
+    /// opendir method didn't set any value.
+    fn releasedir(
+        &mut self,
+        _req: &Request<'_>,
+        _ino: u64,
+        _fh: u64,
+        _flags: i32,
+        reply: ReplyEmpty,
+    ) {
+        reply.ok();
+    }
+
+    /// Synchronize directory contents.
+    /// If the datasync parameter is set, then only the directory contents should
+    /// be flushed, not the meta data. fh will contain the value set by the opendir
+    /// method, or will be undefined if the opendir method didn't set any value.
+    fn fsyncdir(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        datasync: bool,
+        reply: ReplyEmpty,
+    ) {
+        debug!(
+            "[Not Implemented] fsyncdir(ino: {:#x?}, fh: {}, datasync: {})",
+            ino, fh, datasync
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Get file system statistics.
+    fn statfs(&mut self, _req: &Request<'_>, _ino: u64, reply: ReplyStatfs) {
+        reply.statfs(0, 0, 0, 0, 0, 512, 255, 0);
+    }
+
+    /// Set an extended attribute.
+    fn setxattr(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        name: &OsStr,
+        _value: &[u8],
+        flags: i32,
+        position: u32,
+        reply: ReplyEmpty,
+    ) {
+        debug!(
+            "[Not Implemented] setxattr(ino: {:#x?}, name: {:?}, flags: {:#x?}, position: {})",
+            ino, name, flags, position
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Get an extended attribute.
+    /// If `size` is 0, the size of the value should be sent with `reply.size()`.
+    /// If `size` is not 0, and the value fits, send it with `reply.data()`, or
+    /// `reply.error(ERANGE)` if it doesn't.
+    fn getxattr(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        name: &OsStr,
+        size: u32,
+        reply: ReplyXattr,
+    ) {
+        debug!(
+            "[Not Implemented] getxattr(ino: {:#x?}, name: {:?}, size: {})",
+            ino, name, size
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// List extended attribute names.
+    /// If `size` is 0, the size of the value should be sent with `reply.size()`.
+    /// If `size` is not 0, and the value fits, send it with `reply.data()`, or
+    /// `reply.error(ERANGE)` if it doesn't.
+    fn listxattr(&mut self, _req: &Request<'_>, ino: u64, size: u32, reply: ReplyXattr) {
+        debug!(
+            "[Not Implemented] listxattr(ino: {:#x?}, size: {})",
+            ino, size
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Remove an extended attribute.
+    fn removexattr(&mut self, _req: &Request<'_>, ino: u64, name: &OsStr, reply: ReplyEmpty) {
+        debug!(
+            "[Not Implemented] removexattr(ino: {:#x?}, name: {:?})",
+            ino, name
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Check file access permissions.
+    /// This will be called for the access() system call. If the 'default_permissions'
+    /// mount option is given, this method is not called. This method is not called
+    /// under Linux kernel versions 2.4.x
+    fn access(&mut self, _req: &Request<'_>, ino: u64, mask: i32, reply: ReplyEmpty) {
+        debug!("[Not Implemented] access(ino: {:#x?}, mask: {})", ino, mask);
+        reply.error(ENOSYS);
+    }
+
+    /// Create and open a file.
+    /// If the file does not exist, first create it with the specified mode, and then
+    /// open it. Open flags (with the exception of O_NOCTTY) are available in flags.
+    /// Filesystem may store an arbitrary file handle (pointer, index, etc) in fh,
+    /// and use this in other all other file operations (read, write, flush, release,
+    /// fsync). There are also some flags (direct_io, keep_cache) which the
+    /// filesystem may set, to change the way the file is opened. See fuse_file_info
+    /// structure in <fuse_common.h> for more details. If this method is not
+    /// implemented or under Linux kernel versions earlier than 2.6.15, the mknod()
+    /// and open() methods will be called instead.
+    fn create(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        mode: u32,
+        umask: u32,
+        flags: i32,
+        reply: ReplyCreate,
+    ) {
+        debug!(
+            "[Not Implemented] create(parent: {:#x?}, name: {:?}, mode: {}, umask: {:#x?}, \
+            flags: {:#x?})",
+            parent, name, mode, umask, flags
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Test for a POSIX file lock.
+    fn getlk(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        lock_owner: u64,
+        start: u64,
+        end: u64,
+        typ: i32,
+        pid: u32,
+        reply: ReplyLock,
+    ) {
+        debug!(
+            "[Not Implemented] getlk(ino: {:#x?}, fh: {}, lock_owner: {}, start: {}, \
+            end: {}, typ: {}, pid: {})",
+            ino, fh, lock_owner, start, end, typ, pid
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Acquire, modify or release a POSIX file lock.
+    /// For POSIX threads (NPTL) there's a 1-1 relation between pid and owner, but
+    /// otherwise this is not always the case.  For checking lock ownership,
+    /// 'fi->owner' must be used. The l_pid field in 'struct flock' should only be
+    /// used to fill in this field in getlk(). Note: if the locking methods are not
+    /// implemented, the kernel will still allow file locking to work locally.
+    /// Hence these are only interesting for network filesystems and similar.
+    fn setlk(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        lock_owner: u64,
+        start: u64,
+        end: u64,
+        typ: i32,
+        pid: u32,
+        sleep: bool,
+        reply: ReplyEmpty,
+    ) {
+        debug!(
+            "[Not Implemented] setlk(ino: {:#x?}, fh: {}, lock_owner: {}, start: {}, \
+            end: {}, typ: {}, pid: {}, sleep: {})",
+            ino, fh, lock_owner, start, end, typ, pid, sleep
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Map block index within file to block index within device.
+    /// Note: This makes sense only for block device backed filesystems mounted
+    /// with the 'blkdev' option
+    fn bmap(&mut self, _req: &Request<'_>, ino: u64, blocksize: u32, idx: u64, reply: ReplyBmap) {
+        debug!(
+            "[Not Implemented] bmap(ino: {:#x?}, blocksize: {}, idx: {})",
+            ino, blocksize, idx,
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// control device
+    fn ioctl(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        flags: u32,
+        cmd: u32,
+        in_data: &[u8],
+        out_size: u32,
+        reply: ReplyIoctl,
+    ) {
+        debug!(
+            "[Not Implemented] ioctl(ino: {:#x?}, fh: {}, flags: {}, cmd: {}, \
+            in_data.len(): {}, out_size: {})",
+            ino,
+            fh,
+            flags,
+            cmd,
+            in_data.len(),
+            out_size,
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Preallocate or deallocate space to a file
+    fn fallocate(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        length: i64,
+        mode: i32,
+        reply: ReplyEmpty,
+    ) {
+        debug!(
+            "[Not Implemented] fallocate(ino: {:#x?}, fh: {}, offset: {}, \
+            length: {}, mode: {})",
+            ino, fh, offset, length, mode
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Reposition read/write file offset
+    fn lseek(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        whence: i32,
+        reply: ReplyLseek,
+    ) {
+        debug!(
+            "[Not Implemented] lseek(ino: {:#x?}, fh: {}, offset: {}, whence: {})",
+            ino, fh, offset, whence
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// Copy the specified range from the source inode to the destination inode
+    fn copy_file_range(
+        &mut self,
+        _req: &Request<'_>,
+        ino_in: u64,
+        fh_in: u64,
+        offset_in: i64,
+        ino_out: u64,
+        fh_out: u64,
+        offset_out: i64,
+        len: u64,
+        flags: u32,
+        reply: ReplyWrite,
+    ) {
+        debug!(
+            "[Not Implemented] copy_file_range(ino_in: {:#x?}, fh_in: {}, \
+            offset_in: {}, ino_out: {:#x?}, fh_out: {}, offset_out: {}, \
+            len: {}, flags: {})",
+            ino_in, fh_in, offset_in, ino_out, fh_out, offset_out, len, flags
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// macOS only: Rename the volume. Set fuse_init_out.flags during init to
+    /// FUSE_VOL_RENAME to enable
+    #[cfg(target_os = "macos")]
+    fn setvolname(&mut self, _req: &Request<'_>, name: &OsStr, reply: ReplyEmpty) {
+        debug!("[Not Implemented] setvolname(name: {:?})", name);
+        reply.error(ENOSYS);
+    }
+
+    /// macOS only (undocumented)
+    #[cfg(target_os = "macos")]
+    fn exchange(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        newparent: u64,
+        newname: &OsStr,
+        options: u64,
+        reply: ReplyEmpty,
+    ) {
+        debug!(
+            "[Not Implemented] exchange(parent: {:#x?}, name: {:?}, newparent: {:#x?}, \
+            newname: {:?}, options: {})",
+            parent, name, newparent, newname, options
+        );
+        reply.error(ENOSYS);
+    }
+
+    /// macOS only: Query extended times (bkuptime and crtime). Set fuse_init_out.flags
+    /// during init to FUSE_XTIMES to enable
+    #[cfg(target_os = "macos")]
+    fn getxtimes(&mut self, _req: &Request<'_>, ino: u64, reply: ReplyXTimes) {
+        debug!("[Not Implemented] getxtimes(ino: {:#x?})", ino);
+        reply.error(ENOSYS);
+    }
+}
\ No newline at end of file
diff --git a/olivefs/src/filesystem/encryption.rs b/olivefs/src/filesystem/encryption.rs
new file mode 100644
index 0000000..4cdc2d3
--- /dev/null
+++ b/olivefs/src/filesystem/encryption.rs
@@ -0,0 +1,10 @@
+
+// TODO Trait needed to provide encryption
+pub trait EncryptionProvider {
+
+}
+
+// No encryption
+impl EncryptionProvider for () {
+
+}
\ No newline at end of file
diff --git a/olivefs/src/main.rs b/olivefs/src/main.rs
new file mode 100644
index 0000000..2d910ea
--- /dev/null
+++ b/olivefs/src/main.rs
@@ -0,0 +1,34 @@
+use std::path::{Path, PathBuf};
+use crate::filesystem::OliveFilesystem;
+use clap::Parser;
+use env_logger::Env;
+
+pub mod filesystem;
+pub mod requester;
+
+
+#[derive(Parser)]
+pub enum OlivefsCommands {
+    Mount {
+        configuration_file: PathBuf,
+        mount_at: PathBuf
+    }
+}
+
+fn main() {
+    env_logger::Builder::from_env(Env::default().default_filter_or("debug")).init();
+
+    println!("Hello, world!");
+
+    let command: OlivefsCommands = OlivefsCommands::parse();
+
+    match command {
+        OlivefsCommands::Mount { configuration_file, mount_at } => {
+            let fs = OliveFilesystem {
+
+            };
+            //fuser::MountOption::
+            fuser::mount2(fs, mount_at, &[]).unwrap();
+        }
+    }
+}
diff --git a/olivefs/src/requester.rs b/olivefs/src/requester.rs
new file mode 100644
index 0000000..cee9645
--- /dev/null
+++ b/olivefs/src/requester.rs
@@ -0,0 +1,28 @@
+use std::net::SocketAddr;
+use std::str::FromStr;
+use quinn::{Connection, Endpoint, EndpointConfig};
+use tokio::sync::mpsc;
+
+pub struct Requester {
+
+}
+
+pub struct RequesterInternal {
+    rx: mpsc::Receiver<()>,
+    connection: quinn::Connection
+}
+
+impl RequesterInternal {
+    pub async fn send(&mut self) -> anyhow::Result<()> {
+        // TODO use with_roots and only use the desired CA! ...
+        let x = quinn::ClientConfig::with_native_roots();
+        let ep = Endpoint::client(SocketAddr::from_str("0.0.0.0:0").unwrap()).unwrap();
+        let conn = ep.connect(SocketAddr::from_str("127.0.0.1:5051").unwrap(), "blah").unwrap().await.unwrap();
+        // conn.bi_streams and uni_streams are streams needed to listen out for new streams from the server.
+        // conn.datagrams is similar but for unreliable datagrams
+
+        let bi = conn.connection.open_bi().await?;
+
+        Ok(())
+    }
+}
\ No newline at end of file
diff --git a/olivefs_common/Cargo.toml b/olivefs_common/Cargo.toml
new file mode 100644
index 0000000..6420eac
--- /dev/null
+++ b/olivefs_common/Cargo.toml
@@ -0,0 +1,26 @@
+[package]
+name = "olivefs_common"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+# Robustness
+log = "0.4.14"
+env_logger = "0.9.0"
+anyhow = "1.0.52"
+
+# Asynchronous
+tokio = { version = "1.15.0", features = ["full"] }
+
+# Serialisation
+serde = { version = "1.0.133", features = ["derive"] }
+serde_bare = "0.5.0"
+toml = "0.5.8"
+
+# Networking
+quinn = { version = "0.8.0", features = [] }
+
+# Compression and Encryption
+zstd = "0.9.2+zstd.1.5.1"
diff --git a/olivefs_common/src/lib.rs b/olivefs_common/src/lib.rs
new file mode 100644
index 0000000..eb1923e
--- /dev/null
+++ b/olivefs_common/src/lib.rs
@@ -0,0 +1,12 @@
+
+pub mod messages;
+pub mod networking;
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        let result = 2 + 2;
+        assert_eq!(result, 4);
+    }
+}
diff --git a/olivefs_common/src/messages.rs b/olivefs_common/src/messages.rs
new file mode 100644
index 0000000..3d1ec57
--- /dev/null
+++ b/olivefs_common/src/messages.rs
@@ -0,0 +1,52 @@
+use std::fmt::Debug;
+use serde::{Serialize, Deserialize};
+use serde::de::DeserializeOwned;
+
+pub const COMMON_VERSION: &'static str = env!("CARGO_PKG_VERSION");
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+/// The first message sent in both ways in the primary control stream.
+pub struct HelloMessage {
+    /// Version of the common library; used to determine compatibility.
+    /// In the event of a mismatch between client and server, the connection should cease.
+    pub protocol_version: String,
+
+    /// Informational version of each application used — not used for compatibility checks.
+    pub software_version: String,
+}
+
+impl HelloMessage {
+    /// Constructs a HelloMessage from:
+    /// - the version of the common package (as the protocol version, since they are one and the same)
+    /// - the software (client or server version): purely informational.
+    pub fn new(software_version: String) -> HelloMessage {
+        HelloMessage {
+            protocol_version: COMMON_VERSION.to_string(),
+            software_version
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+/// Sent by the client on any data stream.
+pub enum DataCommand {
+
+}
+
+pub trait DataResponseBase: Serialize + DeserializeOwned + Debug + Clone + 'static {
+
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+/// Sent by the server in response to a DataCommand on the same data stream.
+pub enum DataResponse<R: DataResponseBase> {
+    /// The command was successful.
+    Success(R),
+
+    /// The command failed. Here is some information about that.
+    Error {
+        code: i32,
+        // TODO should
+        message: String,
+    },
+}
diff --git a/olivefs_common/src/networking.rs b/olivefs_common/src/networking.rs
new file mode 100644
index 0000000..e745c9c
--- /dev/null
+++ b/olivefs_common/src/networking.rs
@@ -0,0 +1,22 @@
+use quinn::{ReadExactError, RecvStream};
+use serde::de::DeserializeOwned;
+
+
+pub async fn read_control_message<M: DeserializeOwned>(recv_stream: &mut RecvStream) -> anyhow::Result<Option<M>> {
+    let mut u16_buf = [0u8; 2];
+    if let Err(err) = recv_stream.read_exact(&mut u16_buf).await {
+        return if err == ReadExactError::FinishedEarly {
+            Ok(None)
+        } else {
+            Err(err)?;
+            todo!()
+        };
+    }
+    let control_message_length = u16::from_be_bytes(u16_buf) as usize;
+
+    let mut control_message_bytes: Vec<u8> = vec![0u8; control_message_length];
+
+    recv_stream.read_exact(&mut control_message_bytes[..]).await?;
+
+    Ok(todo!())
+}
\ No newline at end of file
diff --git a/olivefsd/Cargo.toml b/olivefsd/Cargo.toml
new file mode 100644
index 0000000..1ba20bb
--- /dev/null
+++ b/olivefsd/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "olivefsd"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+# Robustness
+log = "0.4.14"
+env_logger = "0.9.0"
+anyhow = "1.0.52"
+bare-metrics-recorder = "0.1.0"
+tracing = "0.1.29"
+tracing-futures = { version = "0.2.5", features = ["tokio"] }
+
+# Asynchronous
+tokio = { version = "1.15.0", features = ["full"] }
+futures-util = "0.3.19"
+
+# Serialisation
+serde = { version = "1.0.133", features = ["derive"] }
+serde_bare = "0.5.0"
+toml = "0.5.8"
+
+# Networking
+quinn = { version = "0.8.0", features = [] }
+rustls = "0.20.2"
+
+# Compression and Encryption
+zstd = "0.9.2+zstd.1.5.1"
diff --git a/olivefsd/src/main.rs b/olivefsd/src/main.rs
new file mode 100644
index 0000000..8e28c9b
--- /dev/null
+++ b/olivefsd/src/main.rs
@@ -0,0 +1,32 @@
+use std::net::SocketAddr;
+use std::str::FromStr;
+use std::sync::Arc;
+use futures_util::StreamExt;
+use quinn::Endpoint;
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    println!("Hello, world!");
+
+    //let x = quinn::ServerConfig::with_native_roots();
+    let crypto = rustls::ServerConfig::builder()
+        .with_safe_defaults()
+        .with_client_cert_verifier(todo!())
+        .with_single_cert(todo!(), todo!())?;
+    let crypto = Arc::new(crypto);
+    let x = quinn::ServerConfig::with_crypto(crypto);
+    let (ep, mut incoming) = Endpoint::server(x, SocketAddr::from_str("127.0.0.1:5051").unwrap()).unwrap();
+
+    loop {
+        let next = incoming.next().await;
+        if let Some(next) = next {
+            let mut new_conn = next.await?;
+            let (incoming_tx, incoming_rx) = new_conn.bi_streams.next().await.unwrap()?;
+            //incoming_rx.
+        } else {
+            break;
+        }
+    }
+
+    Ok(())
+}