Hi! So this broke systemd: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e81cd5a983bb35dabd38ee472cf3fea1c63e0f23 We use the "capability" sysfs attr to figure out if a block device has part scanning enabled or not. There seems to be no other API for this. (We also use it in our test suite to see if devices match are expectations, and older systemd/udev versions used to match agains it from udev rules.) The interface was part of sysfs, and documented: https://www.kernel.org/doc/html/v5.5/block/capability.html While it doesn't list the partscan bit it actually does document that one is supposed to look into include/linux/genhd.h for the various bits and their meanings. I'd argue that makes them API to some level. Could this please be reverted? Just keeping the relevant bits (i.e. at least the media change feature bit, and the part scanning bit) is enough for retaining userspace compat. (Please consider googling or a github code search or so before removing a public API like this. This compat breakage was very much avoidable with a tiny bit of googling.) Lennart -- Lennart Poettering, Berlin
