Limit definitions

[wackazong]

I am working on a Rust implementation of a car utility. Could you help me shed some light on where go-car limits are defined?

• Maximum raw section size (256 * 1024 bytes)
• Maximum number of links in a dag-pb (174 is the number I see in the created .car files)

Thanks!

[willscott]

Neither of these are limits specific to car as a file format, but are rather limits in unixfs - the encoding of file into blocks.

https://github.com/ipfs/go-unixfsnode/blob/main/data/builder/file.go#L299-L323 is probably a rough answer to your question

[wackazong]

Great, thanks. That will do.