diff --git a/include/files.h b/include/files.h
index 5379139..95206b8 100644
--- a/include/files.h
+++ b/include/files.h
@@ -27,6 +27,9 @@ class FilesOperation {
     int fischl_readdir(const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *, enum fuse_readdir_flags);
     int fischl_releasedir(const char* path, struct fuse_file_info *fi);
     int fischl_unlink (const char *);
+    int fischl_rmdir(const char *);
+    int fischl_chmod(const char *path, mode_t, struct fuse_file_info *fi);
+    int fischl_chown(const char *path, uid_t uid, gid_t gid, struct fuse_file_info *fi);
     int fischl_open (const char *, struct fuse_file_info *);//open file
     int fischl_release (const char *, struct fuse_file_info *);//close file
     int fischl_write(const char *, const char *, size_t, off_t, struct fuse_file_info *);
diff --git a/lib/files.cpp b/lib/files.cpp
index f00e457..032955c 100644
--- a/lib/files.cpp
+++ b/lib/files.cpp
@@ -376,6 +376,99 @@ void FilesOperation::unlink_inode(u_int64_t inode_number) {
     fs->inode_manager->free_inode(&inode);
 }
 
+int FilesOperation::fischl_rmdir(const char* path) {
+    char *pathdup = strdup(path);
+    char *lastSlash = strrchr(pathdup, '/');
+    *lastSlash = '\0';
+    char *dirname = lastSlash+1;
+    char *ParentPath = pathdup;
+    if (!strcmp(dirname,".")||!strcmp(dirname,"..")) {
+        printf("refusing to remove . or ..\n");
+        return -1;
+    }
+    FileNode *parent_filenode = fischl_find_entry(root_node, ParentPath);
+    if (parent_filenode == NULL) {
+        printf("parent %s not found by fischl_find_entry\n", ParentPath);
+        free(pathdup);
+        return -1;
+    }
+    u_int64_t parent_inode_number = parent_filenode->inode_number;
+    u_int64_t target_inode = 0;
+    
+    // remove its record from parent
+    INode_Data parent_INode;
+    parent_INode.inode_num = parent_inode_number;
+    fs->inode_manager->load_inode(&parent_INode);
+    char rw_buffer[IO_BLOCK_SIZE] = {0};
+    for (u_int64_t idx=0; idx<parent_INode.metadata.size/IO_BLOCK_SIZE; idx++) {
+        fs->read(&parent_INode, rw_buffer, IO_BLOCK_SIZE, idx*IO_BLOCK_SIZE);
+        DirectoryEntry ent;
+        for(int i=0;i<=IO_BLOCK_SIZE-264;i+=264){
+            ent.deserialize(rw_buffer+i);
+            if (strcmp(ent.file_name, dirname)==0) {
+                target_inode = ent.inode_number;
+                ent.inode_number = 0;
+                memset(ent.file_name, 0, sizeof(ent.file_name));
+                ent.serialize(rw_buffer+i);
+                break;
+            }
+        }
+        if (target_inode) {
+            fs->write(&parent_INode, rw_buffer, IO_BLOCK_SIZE, idx*IO_BLOCK_SIZE);
+            break;
+        }
+    }
+    
+    // remove inode itself
+    if (target_inode) {
+        unlink_inode(target_inode);
+        // remove node itself and from parent hash
+        fischl_rm_entry(parent_filenode->subdirectory, dirname);
+        free(pathdup);
+        return 0;
+    } else {
+        printf("cannot find %s in %s", dirname, ParentPath);
+        free(pathdup);
+        return -1;
+    }
+}
+
+int FilesOperation::fischl_chmod(const char *path, mode_t mode, struct fuse_file_info *fi) {
+    (void) fi;
+	int res = 0;
+    u_int64_t fh = namei(path);
+
+    if (fh == -1){
+        return -ENOENT;
+    }
+
+    INode_Data inode;
+    inode.inode_num = fh;
+    fs->inode_manager->load_inode(&inode);
+    inode.metadata.permissions = mode;
+    fs->inode_manager->save_inode(&inode);
+    return 0;
+}
+
+int FilesOperation::fischl_chown(const char *path, uid_t uid, gid_t gid, struct fuse_file_info *fi) {
+    (void) fi;
+	int res = 0;
+    u_int64_t fh = namei(path);
+
+    if (fh == -1){
+        return -ENOENT;
+    }
+
+    INode_Data inode;
+    inode.inode_num = fh;
+    fs->inode_manager->load_inode(&inode);
+    inode.metadata.uid = uid;
+    inode.metadata.gid = gid;
+    fs->inode_manager->save_inode(&inode);
+    return 0;
+}
+
+
 int FilesOperation::fischl_unlink(const char* path) {
     char *pathdup = strdup(path);
     char *lastSlash = strrchr(pathdup, '/');
@@ -482,6 +575,7 @@ int FilesOperation::fischl_write(const char *path, const char *buf, size_t size,
 
     char buffer[size];
     strcpy(buffer, buf);
+    printf("received offset %d\n", offset);
     size_t bytes_write = fs->write(&inode, buffer, size, offset);
     /*size_t block_index = offset / IO_BLOCK_SIZE;  // Starting block index
     size_t block_offset = offset % IO_BLOCK_SIZE; // Offset within the first block
@@ -496,6 +590,7 @@ int FilesOperation::fischl_write(const char *path, const char *buf, size_t size,
         block_offset = 0;  // Only the first block might have a non-zero offset
     }*/
     fs->inode_manager->save_inode(&inode);
+    printf("received offset %llu\n", inode.metadata.size);
     return bytes_write;  // Return the actual number of bytes read
 }
 
diff --git a/lib/fischl.cpp b/lib/fischl.cpp
index 4ad6573..40dc8bc 100644
--- a/lib/fischl.cpp
+++ b/lib/fischl.cpp
@@ -84,7 +84,7 @@ static int fischl_unlink(const char* path) {
 }
 
 static int fischl_rmdir(const char* path) {
-    return -1;
+    return options.fsop->fischl_rmdir(path);
 }
 
 static int fischl_symlink(const char* to, const char* from) {
@@ -99,12 +99,12 @@ static int fischl_link(const char* from, const char* to) {
     return -1;
 }
 
-static int fischl_chmod(const char *path, mode_t, struct fuse_file_info *fi) {
-    return -1;
+static int fischl_chmod(const char *path, mode_t mode, struct fuse_file_info *fi) {
+    return options.fsop->fischl_chmod(path, mode, fi);
 }
 
-static int fischl_chown(const char *path, uid_t, gid_t, struct fuse_file_info *fi) {
-    return -1;
+static int fischl_chown(const char *path, uid_t uid, gid_t gid, struct fuse_file_info *fi) {
+    return options.fsop->fischl_chown(path, uid, gid, fi);
 }
 
 static int fischl_truncate(const char *path, off_t, struct fuse_file_info *fi) {
@@ -136,7 +136,7 @@ static int fischl_release(const char* path, struct fuse_file_info *fi) {
 }
 
 static int fischl_releasedir(const char* path, struct fuse_file_info *fi) {
-    return -1;
+    return options.fsop->fischl_releasedir(path, fi);
 }
 
 static int fischl_bmap(const char* path, size_t blocksize, uint64_t* blockno) {
@@ -160,12 +160,12 @@ static const struct fuse_operations fischl_oper = {
     .mknod       = fischl_mknod,
     .mkdir       = fischl_mkdir,
     .unlink      = fischl_unlink,
-    //.rmdir       = fischl_rmdir,
+    .rmdir       = fischl_rmdir,
     //.symlink     = fischl_symlink,
     //.rename      = fischl_rename,
     //.link        = fischl_link,
-    //.chmod       = fischl_chmod,
-    //.chown       = fischl_chown,
+    .chmod       = fischl_chmod,
+    .chown       = fischl_chown,
     //.truncate    = fischl_truncate,
     .open        = fischl_open,
     .read        = fischl_read,
diff --git a/lib/fs/fs_read_write.cpp b/lib/fs/fs_read_write.cpp
index 1aabf8a..1dda70a 100644
--- a/lib/fs/fs_read_write.cpp
+++ b/lib/fs/fs_read_write.cpp
@@ -61,13 +61,16 @@ int Fs::sweep_datablocks(u_int64_t *block_num, int indirect_num,
   int err;
   int result = -1;
 
+  printf("SURVIVED 1\n");
   if (allocate && (*block_num) == 0)
     if ((err = datablock_manager->new_datablock(block_num)) < 0)
       return err;
-
+    
+  printf("SURVIVED 2 %d\n", indirect_num);
   if (indirect_num == 0)
     return op->operation(*block_num);
 
+  printf("SURVIVED 3\n");
   if ((*block_num) == 0) {
     memset(buf, 0, sizeof(buf));
   } else {
@@ -101,11 +104,11 @@ int Fs::sweep_datablocks(u_int64_t *block_num, int indirect_num,
     if (result == 0)
       break;
   }
-
+  printf("SURVIVED 4 %llu %d %llu\n", *block_num, result, this_layer_start_index);
   if (modified)
     if ((err = disk->write_block(*block_num, buf)) < 0)
       return err;
-
+  printf("SURVIVED 5 %d\n", result);
   return result;
 }
 
@@ -201,12 +204,16 @@ ssize_t Fs::write(INode_Data *inode_data, char buf[], size_t count,
   op.bytes_completed = 0;
   op.disk = disk;
 
+  printf("trying to write %d %llu %llu\n", op.count, offset, start_block_index);
+
   if ((err = sweep_inode_datablocks(inode_data, start_block_index, true, &op)) <
       0)
     return err;
 
-  inode_data->metadata.size =
-      std::max(offset + op.bytes_completed, inode_data->metadata.size);
+  inode_data->metadata.size = offset + op.bytes_completed;
+      //std::max(offset + op.bytes_completed, inode_data->metadata.size);
+
+  printf("written %d\n", op.bytes_completed);
 
   return op.bytes_completed;
 }
\ No newline at end of file
diff --git a/lib/rawdisk.cpp b/lib/rawdisk.cpp
index c0ed0ab..fb1e5f2 100644
--- a/lib/rawdisk.cpp
+++ b/lib/rawdisk.cpp
@@ -123,6 +123,8 @@ int FakeRawDisk::read_block(u_int64_t block_number, char *buffer) {
 int FakeRawDisk::write_block(u_int64_t block_number, char *buffer) {
   u_int64_t offset = block_number * IO_BLOCK_SIZE;
 
+  printf("fake disk write: %llu %llu %llu\n", block_number, offset, diskSize);
+
   if (offset + IO_BLOCK_SIZE > diskSize) {
     perror("Error writing past fake disk size");
     return -1;