Add ext2_superblock definiton

1 files changed, 76 insertions, 0 deletions

diff --git a/kernel/include/kernel/filesystem/ext2/ext2_superblock.hpp b/kernel/include/kernel/filesystem/ext2/ext2_superblock.hpp
new file mode 100644
index 0000000..cd77cd4
--- /dev/null
+++ b/kernel/include/kernel/filesystem/ext2/ext2_superblock.hpp
@@ -0,0 +1,76 @@
+#ifndef EXT2_SUPERBLOCK_HPP
+#define EXT2_SUPERBLOCK_HPP
+
+#include <array>
+#include <cstdint>
+
+namespace filesystem::ext2
+{
+  struct ext2_superblock
+  {
+    uint32_t inodes_count;
+    uint32_t blocks_count;
+    uint32_t reserved_blocks_count;
+    uint32_t free_blocks_count;
+    uint32_t free_inodes_count;
+    uint32_t first_data_block;
+    uint32_t log_block_size;
+    uint32_t log_frag_size;
+    uint32_t blocks_per_group;
+    uint32_t frags_per_group;
+    uint32_t inodes_per_group;
+    uint32_t mtime;
+    uint32_t wtime;
+    uint16_t mnt_count;
+    uint16_t max_mnt_count;
+    uint16_t magic;
+    uint16_t state;
+    uint16_t errors;
+    uint16_t minor_rev_level;
+    uint32_t lastcheck;
+    uint32_t checkinterval;
+    uint32_t creator_os;
+    uint32_t rev_level;
+    uint16_t def_resuid;
+    uint16_t def_resgid;
+
+    // EXT2_DYNAMIC_REV superblock only
+    uint32_t first_ino;
+    uint16_t inode_size;
+    uint16_t block_group_nr;
+    uint32_t feature_compat;
+    uint32_t feature_incompat;
+    uint32_t feature_ro_compat;
+    // uint8_t uuid[16];  // TODO BA-FS26 really correct?
+    std::array<uint8_t, 16> uuid;
+    // uint8_t volume_name[16]; // TODO BA-FS26 really correct?
+    std::array<uint8_t, 16> volume_name;
+    // uint8_t last_mounted[64]; // TODO BA-FS26 really correct?
+    std::array<uint8_t, 64> last_mounted;
+    uint32_t algorithm_usage_bitmap;
+
+    // Performance Hints
+    uint8_t prealloc_blocks;
+    uint8_t prealloc_dir_blocks;
+    uint16_t padding1;
+
+    // Journaling Support
+    // uint8_t journal_uuid[16]; // TODO BA-FS26 really correct?
+    std::array<uint8_t, 16> journal_uuid;
+    uint32_t journal_inum;
+    uint32_t journal_dev;
+    uint32_t last_orphan;
+
+    // Directory Indexing Support
+    // uint32_t hash_seed[4]; // TODO BA-FS26 really correct?
+    std::array<uint32_t, 4> hash_seed;
+    uint8_t def_hash_version;
+    std::array<uint8_t, 3> padding2;
+
+    // Other options
+    uint32_t default_mount_options;
+    uint32_t first_meta_bg;
+    std::array<uint8_t, 760> unused;  // NOLINT(readability-magic-numbers)
+  };
+}  // namespace filesystem::ext2
+#endif
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