On Wed, Jun 18, 2025 at 02:43:34PM -1000, Tejun Heo wrote: > 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 cgroup specific, please. That's what I suggested to Daan.
