selftests/bpf: Test bpf_kptr_xchg stashing of bpf_rb_root

Browse source

There was some confusion amongst Meta sched_ext folks regarding whether
stashing bpf_rb_root - the tree itself, rather than a single node - was
supported. This patch adds a small test which demonstrates this
functionality: a local kptr with rb_root is created, a node is created
and added to the tree, then the tree is kptr_xchg'd into a mapval.

Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20231204211722.571346-1-davemarchevsky@fb.com

...

This commit is contained in:

Dave Marchevsky 2023-12-04 13:17:22 -08:00 • committed by Daniel Borkmann

parent ce3c49da11

commit 1b4c7e20bf

2 changed files with 76 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

tools/testing/selftests/bpf/prog_tests/local_kptr_stash.c

View file

53

tools/testing/selftests/bpf/progs/local_kptr_stash.c

View file