This is the documentation for Project 06 of CSE.30341.FA17.
- Domer McDomerson (dmcdomer@nd.edu)
- Belle Fleur (bfleur@nd.edu)
To implement
Filesystem::debug, you will need to load the file system data structures and report the superblock and inodes.
- How will you read the superblock?
- How will you traverse all the inodes?
- How will you determine all the information related to an inode?
- How will you determine all the blocks related to an inode?
Response.
To implement
FileSystem::format, you will need to write the superblock and clear the remaining blocks in the file system.
- What pre-condition must be true before this operation can succeed?
- What information must be written into the superblock?
- How would you clear all the remaining blocks?
Response.
To implement
FileSystem::mount, you will need to prepare a filesystem for use by reading the superblock and allocating the free block bitmap.
- What pre-condition must be true before this operation can succeed?
- What sanity checks must you perform?
- How will you record that you mounted a disk?
- How will you determine which blocks are free?
Response.
To implement
FileSystem::create, you will need to locate a free inode and save a new inode into the inode table.
- How will you locate a free inode?
- What information would you see in a new inode?
- How will you record this new inode?
Response.
To implement
FileSystem::remove, you will need to locate the inode and then free its associated blocks.
- How will you determine if the specified inode is valid?
- How will you free the direct blocks?
- How will you free the indirect blocks?
- How will you update the inode table?
Response.
To implement
FileSystem::stat, you will need to locate the inode and return its size.
- How will you determine if the specified inode is valid?
- How will you determine the inode's size?
Response.
To implement
FileSystem::read, you will need to locate the inode and copy data from appropriate blocks to the user-specified data buffer.
- How will you determine if the specified inode is valid?
- How will you determine which block to read from?
- How will you handle the offset?
- How will you copy from a block to the data buffer?
Response.
To implement
FileSystem::write, you will need to locate the inode and copy data the user-specified data buffer to data blocks in the file system.
- How will you determine if the specified inode is valid?
- How will you determine which block to write to?
- How will you handle the offset?
- How will you know if you need a new block?
- How will you manage allocating a new block if you need another one?
- How will you copy from a block to the data buffer?
- How will you update the inode?
Describe any known errors, bugs, or deviations from the requirements.
Describe what extra credit (if any) that you implemented.