Prepare devfs file system

kernel/include/fs/devfs.hpp

@@ -0,0 +1,40 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013-2014.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#ifndef DEVFS_HPP
+#define DEVFS_HPP
+
+#include <vector.hpp>
+#include <string.hpp>
+#include <pair.hpp>
+
+#include "vfs/file_system.hpp"
+
+namespace devfs {
+
+struct devfs_file_system : vfs::file_system {
+private:
+    std::string mount_point;
+
+public:
+    devfs_file_system(std::string mount_point);
+    ~devfs_file_system();
+
+    size_t statfs(statfs_info& file);
+    size_t read(const std::vector<std::string>& file_path, char* buffer, size_t count, size_t offset, size_t& read);
+    size_t write(const std::vector<std::string>& file_path, const char* buffer, size_t count, size_t offset, size_t& written);
+    size_t truncate(const std::vector<std::string>& file_path, size_t size);
+    size_t get_file(const std::vector<std::string>& file_path, vfs::file& file);
+    size_t ls(const std::vector<std::string>& file_path, std::vector<vfs::file>& contents);
+    size_t touch(const std::vector<std::string>& file_path);
+    size_t mkdir(const std::vector<std::string>& file_path);
+    size_t rm(const std::vector<std::string>& file_path);
+};
+
+}
+
+#endif

kernel/include/vfs/vfs.hpp

@@ -16,6 +16,7 @@ namespace vfs {
 enum class partition_type {
     FAT32,
     SYSFS,
+    DEVFS,
     UNKNOWN
 };
 

kernel/src/fs/devfs.cpp

@@ -0,0 +1,68 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013-2014.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#include <types.hpp>
+#include <unique_ptr.hpp>
+#include <algorithms.hpp>
+#include <errors.hpp>
+
+#include "fs/devfs.hpp"
+
+#include "console.hpp"
+
+namespace {
+
+
+} //end of anonymous namespace
+
+devfs::devfs_file_system::devfs_file_system(std::string mp) : mount_point(mp) {
+    //Nothing to init
+}
+
+devfs::devfs_file_system::~devfs_file_system(){
+    //Nothing to delete
+}
+
+size_t devfs::devfs_file_system::get_file(const std::vector<std::string>& file_path, vfs::file& f){
+    //TODO
+}
+
+size_t devfs::devfs_file_system::read(const std::vector<std::string>& file_path, char* buffer, size_t count, size_t offset, size_t& read){
+    //TODO
+}
+
+size_t devfs::devfs_file_system::write(const std::vector<std::string>&, const char*, size_t, size_t, size_t&){
+    //TODO
+}
+
+size_t devfs::devfs_file_system::truncate(const std::vector<std::string>& file_path, size_t size){
+    return std::ERROR_PERMISSION_DENIED;
+}
+
+size_t devfs::devfs_file_system::ls(const std::vector<std::string>& file_path, std::vector<vfs::file>& contents){
+    //TODO
+}
+
+size_t devfs::devfs_file_system::touch(const std::vector<std::string>& ){
+    return std::ERROR_PERMISSION_DENIED;
+}
+
+size_t devfs::devfs_file_system::mkdir(const std::vector<std::string>& ){
+    return std::ERROR_PERMISSION_DENIED;
+}
+
+size_t devfs::devfs_file_system::rm(const std::vector<std::string>& ){
+    return std::ERROR_PERMISSION_DENIED;
+}
+
+size_t devfs::devfs_file_system::statfs(statfs_info& file){
+    file.total_size = 0;
+    file.free_size = 0;
+
+    return 0;
+}
+

kernel/src/vfs/vfs.cpp

@@ -17,6 +17,7 @@
 
 #include "fs/fat32.hpp"
 #include "fs/sysfs.hpp"
+#include "fs/devfs.hpp"
 
 #include "scheduler.hpp"
 #include "flags.hpp"
@@ -48,6 +49,8 @@ std::string partition_type_to_string(vfs::partition_type type){
             return "FAT32";
         case vfs::partition_type::SYSFS:
             return "sysfs";
+        case vfs::partition_type::DEVFS:
+            return "devfs";
         case vfs::partition_type::UNKNOWN:
             return "Unknown";
         default:
@@ -66,6 +69,10 @@ void mount_sys(){
     mount(vfs::partition_type::SYSFS, "/sys/", "none");
 }
 
+void mount_dev(){
+    mount(vfs::partition_type::DEVFS, "/dev/", "none");
+}
+
 std::vector<std::string> get_path(const char* file_path){
     std::string file(file_path);
 
@@ -132,6 +139,7 @@ std::vector<std::string> get_fs_path(const std::vector<std::string>& path, const
 void vfs::init(){
     mount_root();
     mount_sys();
+    mount_dev();
 }
 
 int64_t vfs::mount(partition_type type, const char* mount_point, const char* device){
@@ -148,6 +156,11 @@ int64_t vfs::mount(partition_type type, const char* mount_point, const char* dev
 
             break;
 
+        case vfs::partition_type::DEVFS:
+            fs = new devfs::devfs_file_system(mount_point);
+
+            break;
+
         default:
             return -std::ERROR_INVALID_FILE_SYSTEM;
     }