Merge tag 'vfs-6.17-rc1.bpf' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Merge tag 'vfs-6.17-rc1.bpf' of git://git./linux/kernel/git/vfs/vfs

Pull vfs bpf updates from Christian Brauner:
 "These changes allow bpf to read extended attributes from cgroupfs.

  This is useful in redirecting AF_UNIX socket connections based on
  cgroup membership of the socket. One use-case is the ability to
  implement log namespaces in systemd so services and containers are
  redirected to different journals"

* tag 'vfs-6.17-rc1.bpf' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  selftests/kernfs: test xattr retrieval
  selftests/bpf: Add tests for bpf_cgroup_read_xattr
  bpf: Mark cgroup_subsys_state->cgroup RCU safe
  bpf: Introduce bpf_cgroup_read_xattr to read xattr of cgroup's node
  kernfs: remove iattr_mutex