SEARCH_V2: Inappropriate ioctl for device about compsize HOT 3 CLOSED

Yeah, the handling of non-btrfs filesystems is not as good as it should be.

"Inappropriate ioctl for device" still sounds better than "Not a typewriter" this ioctl would say a while ago (its #define is still named ENOTTY), but an expected error should provide a more obvious message.

I still think that failing immediately when given a non-btrfs initial directory is a good idea, as most of the time all the recursive traversal would be pointless. Should probably have an override for your use case, though.

Any advice?

from compsize.

Thank you for the response. I'm not a developer at all (at least not programmer). I've unmounted the samba share in my home directory (subfolder in home: /home/akiss/share), and compsize produces a report. Yes, maybe it would be useful if compsize ignored any non-brtfs subfolder, or maybe included that in the report. It would help to get compression stats on root even in the common case when there is a separate ext boot partition mounted.

I think it's really cool to see how much smaller data becomes with compression. I hope it will be in the kernel soon as part of brtfs-progs.

from compsize.

The error message is unhelpful enough that it needs fixing.

from compsize.