From 886df6daf6bb6b922276157dba1cc099e897a9ea Mon Sep 17 00:00:00 2001
From: Chuyan Zhang <me@zcy.moe>
Date: Sat, 18 Nov 2023 02:43:01 -0800
Subject: Major refactor of file hierarchy

---
 src/filesystem/mod.rs        |   2 +
 src/filesystem/trait_impl.rs | 189 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 191 insertions(+)
 create mode 100644 src/filesystem/mod.rs
 create mode 100644 src/filesystem/trait_impl.rs

(limited to 'src/filesystem')

diff --git a/src/filesystem/mod.rs b/src/filesystem/mod.rs
new file mode 100644
index 0000000..1eaa8e8
--- /dev/null
+++ b/src/filesystem/mod.rs
@@ -0,0 +1,2 @@
+/// Where upper filesystem calls are implemented.
+pub mod trait_impl;
diff --git a/src/filesystem/trait_impl.rs b/src/filesystem/trait_impl.rs
new file mode 100644
index 0000000..9f157a5
--- /dev/null
+++ b/src/filesystem/trait_impl.rs
@@ -0,0 +1,189 @@
+use std::ffi::OsStr;
+use std::time::SystemTime;
+use fuser::{Filesystem, KernelConfig, ReplyAttr, ReplyData, ReplyDirectory, ReplyEmpty, ReplyEntry, ReplyLseek, ReplyWrite, Request, TimeOrNow};
+use libc::{c_int, ENOENT, ENOSPC, ENOSYS};
+use log::debug;
+use crate::AyaFS;
+
+impl Filesystem for AyaFS {
+    fn init(&mut self, _req: &Request<'_>, _config: &mut KernelConfig) -> Result<(), c_int> {
+        debug!("Filesystem::init called.");
+        Ok(())
+    }
+
+    fn destroy(&mut self) {
+        debug!("Filesystem::destroy()");
+    }
+
+    fn lookup(&mut self, _req: &Request<'_>, parent: u64, name: &OsStr, reply: ReplyEntry) {
+        debug!(
+            "Filesystem::lookup called with parent {} name {}",
+            parent,
+            name.to_str().unwrap()
+        );
+        let parent = parent as usize;
+        if let Some(inode) = self.get_inode(parent) {
+            // debug!("{:?}", inode);
+        }
+        // if self.inode_active(parent) {
+        //     let (block, offset) = self.locate_inode(parent);
+        //     let inode = self.get_inode(block, offset);
+        //     debug!("{:?}", inode);
+        // }
+        reply.error(ENOENT);
+    }
+
+    fn forget(&mut self, _req: &Request<'_>, _ino: u64, _nlookup: u64) {
+        debug!("Filesystem::forget()");
+        todo!("This is a dumb implementation")
+    }
+
+    fn getattr(&mut self, _req: &Request<'_>, ino: u64, reply: ReplyAttr) {
+        debug!("Filesystem::getattr(ino: {})", ino);
+        let ino = ino as usize;
+        if let Some(inode) = self.get_inode(ino) {
+            // debug!("{:?}", inode);
+        }
+        reply.error(ENOENT);
+    }
+
+    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!(
+            "Filesystem::setattr(ino: {:#x?}, mode: {:?}, uid: {:?}, \
+            gid: {:?}, size: {:?}, fh: {:?}, flags: {:?})",
+            ino, mode, uid, gid, size, fh, flags
+        );
+        reply.error(ENOSYS);
+    }
+
+    fn readlink(&mut self, _req: &Request<'_>, ino: u64, reply: ReplyData) {
+        debug!("[Not Implemented] readlink(ino: {})", ino);
+        reply.error(ENOSYS);
+    }
+
+    fn mknod(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        mode: u32,
+        umask: u32,
+        rdev: u32,
+        reply: ReplyEntry,
+    ) {
+        debug!(
+            "Filesystem::mknod(parent: {}, name: {:?}, mode: {}, umask: {}, rdev: {})",
+            parent, name, mode, umask, rdev
+        );
+        reply.error(ENOSPC);
+    }
+
+    fn mkdir(
+        &mut self,
+        _req: &Request<'_>,
+        parent: u64,
+        name: &OsStr,
+        mode: u32,
+        umask: u32,
+        reply: ReplyEntry,
+    ) {
+        debug!(
+            "Filesystem::mkdir(parent: {}, name: {:?}, mode: {}, umask: {})",
+            parent, name, mode, umask
+        );
+        if let Some(inode) = self.get_inode(parent as usize) {
+        } else {
+            reply.error(ENOENT);
+        }
+        // reply.error(ENOSPC);
+    }
+
+    fn read(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        _fh: u64,
+        offset: i64,
+        _size: u32,
+        _flags: i32,
+        _lock_owner: Option<u64>,
+        reply: ReplyData,
+    ) {
+        todo!()
+    }
+
+    fn readdir(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        _fh: u64,
+        offset: i64,
+        mut reply: ReplyDirectory,
+    ) {
+        todo!()
+    }
+
+    fn access(&mut self, _req: &Request<'_>, ino: u64, mask: i32, reply: ReplyEmpty) {
+        debug!("Filesystem::getattr(ino: {}, mask: {})", ino, mask);
+        if let Some(inode) = self.get_inode(ino as usize) {
+            reply.ok()
+        } else {
+            reply.error(ENOENT)
+        }
+    }
+
+    fn lseek(
+        &mut self,
+        _req: &Request<'_>,
+        ino: u64,
+        fh: u64,
+        offset: i64,
+        whence: i32,
+        reply: ReplyLseek,
+    ) {
+        debug!(
+            "lseek(ino: {:#x?}, fh: {}, offset: {}, whence: {})",
+            ino, fh, offset, whence
+        );
+        reply.error(ENOSYS);
+    }
+
+    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!(
+            "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);
+    }
+}
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2