✨ Feat: Create an ext4 file system compatible program entry.

.vscode/settings.json

@@ -23,10 +23,9 @@
         "cafs",
         "libc",
         "bootloader",
-        /* EFI */
         "uefi",
+        "repr",
         "proto",
-        /* ELF HEADER */
         "e_phoff",
         "e_shoff",
         "e_ehsize",
@@ -35,13 +34,21 @@
         "e_shentsize",
         "e_shnum",
         "e_shstrndx",
-        /* ELF PROGRAM HEADER TABLE */
         "p_vaddr",
         "p_paddr",
         "p_filesz",
         "p_memsz",
-        /* ELF SECTION HEADER TABLE */
-        "sh_addralign",
+        "sh_addralign", 
         "sh_entsize",
+        "inodes",
+        "wtime",
+        "lastcheck",
+        "checkinterval",
+        "resuid",
+        "resgid",
+        "incompat",
+        "prealloc",
+        "inum",
+        "kbytes"
     ],
 }

canicula-common/src/fs.rs

@@ -1,5 +1,3 @@
-use core::usize;
-
 #[derive(Debug)]
 pub enum OperateError {
     InvalidFileDescriptor,
@@ -10,8 +8,3 @@ pub enum OperateError {
     NotFoundDev,
     TimeOut,
 }
-
-pub trait Fs {
-    fn read<const SIZE: usize>(path: &str) -> Result<[u8; SIZE], OperateError>;
-    fn write<const SIZE: usize>(path: &str, content: [u8; SIZE]) -> Result<usize, OperateError>;
-}

canicula-ext4/Cargo.toml

@@ -8,3 +8,4 @@ name = "canicula_ext4"
 path = "src/ext4.rs"
 
 [dependencies]
+canicula-common = { path = "../canicula-common" }

canicula-ext4/src/ext4.rs

@@ -1,2 +1,30 @@
 #![no_std]
 #![no_main]
+
+use canicula_common::fs::OperateError;
+use types::super_block::SuperBlock;
+
+mod types;
+
+#[allow(unused)]
+struct Ext4FS<const SIZE: usize> {
+    read_byte: fn(usize) -> Result<u8, OperateError>,
+    write_byte: fn(u8, usize) -> Result<usize, OperateError>,
+    super_block: Option<SuperBlock>,
+}
+
+#[allow(unused)]
+impl<const SIZE: usize> Ext4FS<SIZE> {
+    pub fn new(
+        read_byte: fn(usize) -> Result<u8, OperateError>,
+        write_byte: fn(u8, usize) -> Result<usize, OperateError>,
+    ) -> Self {
+        Ext4FS {
+            read_byte,
+            write_byte,
+            super_block: None,
+        }
+    }
+
+    pub fn init() {}
+}

canicula-ext4/src/types.rs

@@ -0,0 +1,6 @@
+pub mod data_block;
+pub mod data_block_bitmap;
+pub mod group_descriptors;
+pub mod inode_bitmap;
+pub mod inode_table;
+pub mod super_block;

canicula-ext4/src/types/super_block.rs

@@ -0,0 +1,97 @@
+#[repr(C)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct SuperBlock {
+    s_inodes_count: u32,
+    s_blocks_count_lo: u32,
+    s_r_blocks_count_lo: u32,
+    s_free_blocks_count_lo: u32,
+    s_free_inodes_count: u32,
+    s_first_data_block: u32,
+    s_log_block_size: u32,
+    s_log_cluster_size: u32,
+    s_blocks_per_group: u32,
+    s_clusters_per_group: u32,
+    s_inodes_per_group: u32,
+    s_mtime: u32,
+    s_wtime: u32,
+    s_mnt_count: u16,
+    s_max_mnt_count: u16,
+    s_magic: u16,
+    s_state: u16,
+    s_errors: u16,
+    s_minor_rev_level: u16,
+    s_lastcheck: u32,
+    s_checkinterval: u32,
+    s_creator_os: u32,
+    s_rev_level: u32,
+    s_def_resuid: u16,
+    s_def_resgid: u16,
+    s_first_ino: u32,
+    s_inode_size: u16,
+    s_block_group_nr: u16,
+    s_feature_compat: u32,
+    s_feature_incompat: u32,
+    s_feature_ro_compat: u32,
+    s_uuid: [u8; 16],
+    s_volume_name: [char; 16],
+    s_last_mounted: [char; 64],
+    s_algorithm_usage_bitmap: u32,
+    s_prealloc_blocks: u8,
+    s_prealloc_dir_blocks: u8,
+    s_reserved_gdt_blocks: u16,
+    s_journal_uuid: [u8; 16],
+    s_journal_inum: u32,
+    s_journal_dev: u32,
+    s_last_orphan: u32,
+    s_hash_seed: [u32; 4],
+    s_def_hash_version: u8,
+    s_jnl_backup_type: u8,
+    s_desc_size: u16,
+    s_default_mount_opts: u32,
+    s_first_meta_bg: u32,
+    s_mkfs_time: u32,
+    s_jnl_blocks: [u32; 17],
+    s_blocks_count_hi: u32,
+    s_r_blocks_count_hi: u32,
+    s_free_blocks_count_hi: u32,
+    s_min_extra_isize: u16,
+    s_want_extra_isize: u16,
+    s_flags: u32,
+    s_raid_stride: u16,
+    s_mmp_interval: u16,
+    s_mmp_block: u64,
+    s_raid_stripe_width: u32,
+    s_log_groups_per_flex: u8,
+    s_checksum_type: u8,
+    s_reserved_pad: u16,
+    s_kbytes_written: u64,
+    s_snapshot_inum: u32,
+    s_snapshot_id: u32,
+    s_snapshot_r_blocks_count: u64,
+    s_snapshot_list: u32,
+    s_error_count: u32,
+    s_first_error_time: u32,
+    s_first_error_ino: u32,
+    s_first_error_block: u64,
+    s_first_error_func: [u8; 32],
+    s_first_error_line: u32,
+    s_last_error_time: u32,
+    s_last_error_ino: u32,
+    s_last_error_line: u32,
+    s_last_error_block: u64,
+    s_last_error_func: [u8; 32],
+    s_mount_opts: [u8; 64],
+    s_usr_quota_inum: u32,
+    s_grp_quota_inum: u32,
+    s_overhead_blocks: u32,
+    s_backup_bgs: [u32; 2],
+    s_encrypt_algos: [u8; 4],
+    s_encrypt_pw_salt: [u8; 16],
+    s_lpf_ino: u32,
+    s_prj_quota_inum: u32,
+    s_checksum_seed: u32,
+    s_reserved: [u32; 98],
+    s_checksum: u32,
+}
+
+impl SuperBlock {}