Hello, On Wed, Jun 18, 2025 at 04:37:35PM -0700, Song Liu wrote: > Introduce a new kfunc bpf_kernfs_read_xattr, which can read xattr from > kernfs nodes (cgroupfs, for example). The primary users are LSMs, for > example, from systemd. sched_ext could also use xattrs on cgroupfs nodes. > However, this is not allowed yet, because bpf_kernfs_read_xattr is only > allowed from LSM hooks. The plan is to address sched_ext later (or in a > later revision of this set). I don't think kernfs is the name we should be exposing to BPF users. This is an implementation detail which may change in the future. I'd rather make it a generic interface or a cgroup specific one. The name "kernfs" doesn't really mean much outside kernel code that's using them. Thanks. -- tejun
