diff options
Diffstat (limited to 'kernel/src/filesystem/ext2/filesystem.cpp')
| -rw-r--r-- | kernel/src/filesystem/ext2/filesystem.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/src/filesystem/ext2/filesystem.cpp b/kernel/src/filesystem/ext2/filesystem.cpp index d7c989c..7ee1072 100644 --- a/kernel/src/filesystem/ext2/filesystem.cpp +++ b/kernel/src/filesystem/ext2/filesystem.cpp @@ -36,6 +36,10 @@ namespace kernel::filesystem::ext2 constexpr uint16_t S_IFREG = 0x8000; constexpr uint16_t S_IFDIR = 0x4000; + // Error codes + constexpr int INVALID_MAGIC_NUMBER = -1; + constexpr int INVALID_ROOT_INODE = -2; + auto S_ISREG(uint16_t mode) -> bool { return (mode & S_IFMT) == S_IFREG; @@ -55,7 +59,7 @@ namespace kernel::filesystem::ext2 if (m_superblock.magic != MAGIC_NUMBER) { - return -1; + return INVALID_MAGIC_NUMBER; } auto const block_size = get_block_size(); @@ -70,7 +74,11 @@ namespace kernel::filesystem::ext2 num_block_groups * sizeof(block_group_descriptor)); m_root_inode = read_inode(ROOT_INODE_NUMBER); - // TODO BA-FS26 check if root inode is valid and is a directory ?? + + if (!m_root_inode || !m_root_inode->is_directory()) + { + return INVALID_ROOT_INODE; + } return 0; } |