test: test 4G file writing

Author: yuoo655

gen_img.sh

@@ -1,6 +1,7 @@
 rm -rf ex4.img
-dd if=/dev/zero of=ex4.img bs=1M count=4096
+dd if=/dev/zero of=ex4.img bs=1M count=8192
 mkfs.ext4 ./ex4.img
+rm -rf tmp
 mkdir tmp
 mount ./ex4.img ./tmp/
 cd tmp

run.sh

@@ -1,7 +1,7 @@
 rm -rf test_files
 python3 gen_test_files.py
 rm -rf ex4.img
-dd if=/dev/zero of=ex4.img bs=1M count=4096
+dd if=/dev/zero of=ex4.img bs=1M count=8192
 mkfs.ext4 ./ex4.img
 
 ## create link

src/main.rs

@@ -157,10 +157,19 @@ fn main() {
     // file create/write
     log::info!("----create file----");
     let inode_mode = InodeFileType::S_IFREG.bits();
-    let inode_ref = ext4.create(ROOT_INODE, "511M.txt", inode_mode).unwrap();
+    let inode_perm = (InodePerm::S_IREAD | InodePerm::S_IWRITE).bits();
+    let inode_ref = ext4.create(ROOT_INODE, "4G.txt", inode_mode | inode_perm).unwrap();
     log::info!("----write file----");
-    // test 511M  for 512M we need split the extent tree
-    const WRITE_SIZE: usize = (0x100000 * 511);
+    const WRITE_SIZE: usize = (0x100000 * (4096));
     let write_buf = vec![0x41 as u8; WRITE_SIZE];
     let r = ext4.write_at(inode_ref.inode_num, 0, &write_buf);
+
+    // check
+    let path = "4G.txt";
+    let mut read_buf = vec![0u8;  WRITE_SIZE as usize];
+    let child_inode = ext4.generic_open(path, &mut 2, false, 0, &mut 0).unwrap();
+    let mut data = vec![0u8; WRITE_SIZE as usize];
+    let read_data = ext4.read_at(child_inode, 0 as usize, &mut data);
+    log::info!("read data  {:?}", &data[..10]);
+
 }