This patch adds filter for scx_kfunc_ids_unlocked.
The kfuncs in the scx_kfunc_ids_unlocked set can be used in init, exit,
cpu_online, cpu_offline, init_task, dump, cgroup_init, cgroup_exit,
cgroup_prep_move, cgroup_cancel_move, cgroup_move, cgroup_set_weight
operations.
Signed-off-by: Juntong Deng <juntong.deng@xxxxxxxxxxx>
---
kernel/sched/ext.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 7f039a32f137..955fb0f5fc5e 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -7079,9 +7079,39 @@ BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq, KF_RCU)
BTF_ID_FLAGS(func, scx_bpf_dispatch_vtime_from_dsq, KF_RCU)
BTF_KFUNCS_END(scx_kfunc_ids_unlocked)
+static int scx_kfunc_ids_unlocked_filter(const struct bpf_prog *prog, u32 kfunc_id)
+{
+ u32 moff;
+
+ if (!btf_id_set8_contains(&scx_kfunc_ids_unlocked, kfunc_id) ||
+ prog->aux->st_ops != &bpf_sched_ext_ops)
+ return 0;
+
+ moff = prog->aux->attach_st_ops_member_off;
+ if (moff == offsetof(struct sched_ext_ops, init) ||
+ moff == offsetof(struct sched_ext_ops, exit) ||
+ moff == offsetof(struct sched_ext_ops, cpu_online) ||
+ moff == offsetof(struct sched_ext_ops, cpu_offline) ||
+ moff == offsetof(struct sched_ext_ops, init_task) ||
+ moff == offsetof(struct sched_ext_ops, dump))
+ return 0;
+
+#ifdef CONFIG_EXT_GROUP_SCHED
+ if (moff == offsetof(struct sched_ext_ops, cgroup_init) ||
+ moff == offsetof(struct sched_ext_ops, cgroup_exit) ||
+ moff == offsetof(struct sched_ext_ops, cgroup_prep_move) ||
+ moff == offsetof(struct sched_ext_ops, cgroup_cancel_move) ||
+ moff == offsetof(struct sched_ext_ops, cgroup_move) ||
+ moff == offsetof(struct sched_ext_ops, cgroup_set_weight))
+ return 0;
+#endif
+ return -EACCES;
+}
+
static const struct btf_kfunc_id_set scx_kfunc_set_unlocked = {
.owner = THIS_MODULE,
.set = &scx_kfunc_ids_unlocked,
+ .filter = scx_kfunc_ids_unlocked_filter,
};
__bpf_kfunc_start_defs();
--
2.39.5
