# ext2 Linux file system

FUSE-based file system that mounts onto Linux OS to allow commands such as ls, cat, stat, and readlink. Images of file systems are read and computed to find relevant information such as size, block size, volume name, inodes, and block groups. Path resolution is also implemented by traversing directory entries in block groups.

Program runs on Linux environments, using the package libfuse-dev.

## Part 1: File System Information

Relevant files:

• ext2.c
• ext2test.c
• ext2.h

Reads image files into a volume struct, including the superblock and group descriptor table, filling in the relevant fields according to the Internal Layout documentation of ext2fs.

## Part 2: Inodes and Path Resolution

Relevant files:

• ext2.c
• ext2test.c
• ext2.h

Functions related to reading inodes, file blocks, and file content implemented. In addition, functions to return the block number containing the data according to a particular index is implemented. Because an inode contains direct blocks, single-, double-, and triple- indirect blocks, calculations must be done to find this index.

find_file_from_path splits the path into components using strtok, and for each component recursively searches entries for the next component in order to find the inode for the final file.

## Part 3: Virtual File System

Relevant files:

• ext2fs.c