linux-kernel - [RFC PATCH bpf-next 3/8] sched_ext: Add filter for scx_kfunc_ids_enqueue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID:
 <AM6PR03MB50807BA3D5FF24BDA684974799F72@AM6PR03MB5080.eurprd03.prod.outlook.com>
Date: Wed,  5 Feb 2025 19:30:15 +0000
From: Juntong Deng <juntong.deng@...look.com>
To: ast@...nel.org,
	daniel@...earbox.net,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	memxor@...il.com,
	tj@...nel.org,
	void@...ifault.com,
	arighi@...dia.com,
	changwoo@...lia.com
Cc: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH bpf-next 3/8] sched_ext: Add filter for scx_kfunc_ids_enqueue_dispatch

This patch adds filter for scx_kfunc_ids_enqueue_dispatch.

The kfuncs in the scx_kfunc_ids_enqueue_dispatch set can be used in
enqueue, select_cpu, dispatch and other rq-locked operations.

Signed-off-by: Juntong Deng <juntong.deng@...look.com>
---
 kernel/sched/ext.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index c92949aa23f6..d782ee618d54 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -6605,9 +6605,27 @@ BTF_ID_FLAGS(func, scx_bpf_dispatch, KF_RCU)
 BTF_ID_FLAGS(func, scx_bpf_dispatch_vtime, KF_RCU)
 BTF_KFUNCS_END(scx_kfunc_ids_enqueue_dispatch)
 
+static int scx_kfunc_ids_enqueue_dispatch_filter(const struct bpf_prog *prog, u32 kfunc_id)
+{
+	u32 moff;
+
+	if (!btf_id_set8_contains(&scx_kfunc_ids_enqueue_dispatch, 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, enqueue) ||
+	    moff == offsetof(struct sched_ext_ops, select_cpu) ||
+	    moff == offsetof(struct sched_ext_ops, dispatch))
+		return 0;
+
+	return scx_kfunc_ids_other_rqlocked_filter(prog, kfunc_id);
+}
+
 static const struct btf_kfunc_id_set scx_kfunc_set_enqueue_dispatch = {
 	.owner			= THIS_MODULE,
 	.set			= &scx_kfunc_ids_enqueue_dispatch,
+	.filter			= scx_kfunc_ids_enqueue_dispatch_filter,
 };
 
 static bool scx_dsq_move(struct bpf_iter_scx_dsq_kern *kit,
-- 
2.39.5