file文件

src/kernel/file.rs

+use crate::kernel::{fs,param};
+use fs::NDIRECT;
+use param::NDEV;
+enum Filetype{
+    FD_NONE,
+    FD_PIPE,
+    FD_INODE,
+    FD_DEVICE,
+}
+pub struct Inode{
+    dev:u32,// Device number
+    inum:u32,// Inode number
+    refcnt:i32,// Reference count
+    lock:Sleeplock,// protects everything below here
+    valid:bool,// inode has been read from disk?
+
+    inode_type:i16,// copy of disk inode
+    major:i16,
+    minor:i16,
+    nlink:i16,
+    size:u32,
+    addrs:[u32;NDIRECT+1]
+}
+pub struct File{
+    file_type:Filetype,
+    refcnt:i32,// reference count
+    readable:bool,
+    writable:bool,
+    pipe:Option<&'static Pipe>,// FD_PIPE
+    ip:Option<&'static Inode>,// FD_INODE and FD_DEVICE
+    off:u32,// FD_INODE
+    major:i16,// FD_DEVICE
+}
+// map major device number to device functions.
+pub struct Devsw{
+    read:Option<Box<dyn FnMut(i32,u64,i32)>>,
+    write:Option<Box<dyn FnMut(i32,u64,i32)>>,
+}
+impl Default for Devsw{
+    fn default()->Self{
+        Self{
+            read:None,
+            write:None,
+        }
+    }
+}
+pub static mut devsw:[Devsw;NDEV]=[Devsw::default();NDEV];
+#[macro_export] macro_rules! major{
+     ($dex:expr)=>{((dev)>>16)&0xFFFF};
+}
+#[macro_export] macro_rules! minor{
+     ($dex:expr)=>{(dev)&0xFFFF};
+}
+#[macro_export] macro_rules! mkdev{
+     ($m:expr,$n:expr)=>{(m)<<16|(n)};
+}
+pub const CONSOLE:i32=1;
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src/kernel/fs.rs

+pub const ROOTINO
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src/kernel/mod.rs

-pub mod device;
-pub mod memlayout;
-pub mod proc;
-pub mod spinlock;
-pub mod param;
\ No newline at end of file
+mod device;
+mod memlayout;
+mod proc;
+mod spinlock;
+mod param;
+mod file;
+mod fs;
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src/kernel/proc.rs

@@ -48,7 +48,7 @@ pub struct Proc{
     kstack:usize,// Virtual address of kernel stack
     sz:usize,// Size of process memory (bytes)
     pagetable:usize,// User page table
-    trapframe:&'static Trapframe,// data page for trampoline.S
+    trapframe:Option<&'static Trapframe>,// data page for trampoline.S
     context:Context,// switch() here to run process
     ofile:Option<&'static[File;NOFILE]>,// Open files
     cwd:Option<&'static mut Inode>,// Current directory
@@ -67,7 +67,7 @@ impl Default for Proc{
             kstack,
             sz,
             pagetable,
-            trapframe:&Trapframe::default(),
+            trapframe:None,
             context:Context::default(),
             ofile:None,
             cwd:None,
@@ -88,11 +88,11 @@ impl Proc{
             kstack,
             sz,
             pagetable,
-            trapframe:match(parent){
+            trapframe:match parent{
                 Some(_)=>parent.unwrap().trapframe.clone(),
-                None()=>&Trapframe::default(),
+                None()=>None,
             },
-            context:match(parent){
+            context:match parent{
                 Some(_)=>parent.unwrap().context.clone(),
                 None()=>Context::default(),
             },
@@ -102,5 +102,5 @@ impl Proc{
         }
     }
 }
-static mut CPUS:[Cpu;NCPU]=[Cpu::default();NCPU];
-static mut PROC:[Proc;NPROC]=[Proc::default();NPROC];
+pub static mut cpus:[Cpu;NCPU]=[Cpu::default();NCPU];
+pub static mut proc:[Proc;NPROC]=[Proc::default();NPROC];
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