From 76ac602c3d79bb39c133c81a38425a77bc0b8b1f Mon Sep 17 00:00:00 2001
From: Chuyan Zhang <me@zcy.moe>
Date: Sat, 25 Nov 2023 02:13:22 -0800
Subject: Some FUSE callbacks, some POSIX interface implementation

---
 src/memory/cached_inode.rs | 71 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 67 insertions(+), 4 deletions(-)

(limited to 'src/memory/cached_inode.rs')

diff --git a/src/memory/cached_inode.rs b/src/memory/cached_inode.rs
index dd5e5c3..be87850 100644
--- a/src/memory/cached_inode.rs
+++ b/src/memory/cached_inode.rs
@@ -1,10 +1,76 @@
-use crate::disk::block::InodeBlock;
+use crate::disk::block::{DirectoryBlock, DirectoryEntry, InodeBlock};
 use crate::disk::inode::{Inode, InodeMode, INODE_SIZE};
+use crate::utils::from_filetype;
 use crate::{utils, AyaFS};
 use and_then_some::BoolExt;
+use fuser::FileType;
 use log::debug;
 
 impl AyaFS {
+    pub(crate) fn create_file(
+        &mut self,
+        permissions: u16,
+        uid: u32,
+        gid: u32,
+        flags: u32,
+    ) -> Option<(usize, &Inode)> {
+        self.inode_bitmap.allocate().map(|inode_index| {
+            self.get_inode_mut(inode_index).map(|inode| {
+                *inode = Inode::file(permissions, uid, gid, utils::time_now(), flags, 0, 0, 0);
+            });
+            (inode_index, self.get_inode(inode_index).unwrap())
+        })
+    }
+
+    pub(crate) fn create_directory(
+        &mut self,
+        permissions: u16,
+        uid: u32,
+        gid: u32,
+        flags: u32,
+    ) -> Option<(usize, &Inode)> {
+        self.inode_bitmap.allocate().map(|inode_index| {
+            // 创建 Inode
+            let mut new_inode =
+                Inode::directory(permissions, uid, gid, utils::time_now(), flags, 0, 0, 0);
+            // 分配第一个 direct block
+            new_inode.direct[0] = self.allocate_block_for(&mut new_inode).unwrap();
+            new_inode.size = 2;
+            // 在 direct block 里分配 . 和 ..
+            if let Some(directory_block) =
+                self.get_block_mut::<DirectoryBlock>(new_inode.direct[0] as usize)
+            {
+                let dot = '.'.to_ascii_lowercase() as u8;
+                // add dot entry
+                directory_block.block.entries[0] = DirectoryEntry {
+                    inode: inode_index as u32,
+                    record_len: 264,
+                    name_len: 1,
+                    file_type: 0x2,
+                    name: [0; 256],
+                };
+                directory_block.block.entries[0].name[0] = dot;
+
+                // add dot dot entry
+                directory_block.block.entries[1] = DirectoryEntry {
+                    inode: 0, // TODO set this as parent inode number
+                    record_len: 264,
+                    name_len: 2,
+                    file_type: 0x2,
+                    name: [0; 256],
+                };
+                directory_block.block.entries[1].name[0] = dot;
+                directory_block.block.entries[1].name[1] = dot;
+            }
+            // 把 inode 放到指定位置
+            self.get_inode_mut(inode_index).map(|inode| {
+                *inode = new_inode;
+            });
+
+            (inode_index, self.get_inode(inode_index).unwrap())
+        })
+    }
+
     pub(crate) fn create_inode(
         &mut self,
         permissions: u16,
@@ -13,9 +79,7 @@ impl AyaFS {
         gid: u32,
         flags: u32,
     ) -> Option<usize> {
-        debug!("create inode");
         self.inode_bitmap.allocate().map(|inode_index| {
-            debug!("creating inode");
             self.get_inode_mut(inode_index).map(|inode| {
                 *inode = Inode::make_inode(
                     permissions,
@@ -29,7 +93,6 @@ impl AyaFS {
                     0,
                 );
             });
-            debug!("inode created");
             inode_index
         })
     }
-- 
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