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Subject[PATCH bpf-next] bpf: Make bpf_get_current_[ancestor_]cgroup_id() available for all program types
These helpers are safe to call from any context and there's no reason to
restrict access to them. Remove them from bpf_trace and filter lists and add
to bpf_base_func_proto() under perfmon_capable().

Please note that while test_verifier results remain the same, I'm unsure
whether subjecting their availability to perfmon_capable() is the right
decision.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
kernel/bpf/cgroup.c | 4 ----
kernel/bpf/helpers.c | 6 ++++++
kernel/trace/bpf_trace.c | 4 ----
net/core/filter.c | 6 ------
4 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index bf2fdb33fb31..a4ae422b8f12 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -2529,10 +2529,6 @@ cgroup_current_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_get_current_pid_tgid_proto;
case BPF_FUNC_get_current_comm:
return &bpf_get_current_comm_proto;
- case BPF_FUNC_get_current_cgroup_id:
- return &bpf_get_current_cgroup_id_proto;
- case BPF_FUNC_get_current_ancestor_cgroup_id:
- return &bpf_get_current_ancestor_cgroup_id_proto;
#ifdef CONFIG_CGROUP_NET_CLASSID
case BPF_FUNC_get_cgroup_classid:
return &bpf_get_cgroup_classid_curr_proto;
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 49a2ab8eb0bb..6f8545738a19 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -1726,6 +1726,12 @@ bpf_base_func_proto(enum bpf_func_id func_id)
return &bpf_task_pt_regs_proto;
case BPF_FUNC_trace_vprintk:
return bpf_get_trace_vprintk_proto();
+#ifdef CONFIG_CGROUPS
+ case BPF_FUNC_get_current_cgroup_id:
+ return &bpf_get_current_cgroup_id_proto;
+ case BPF_FUNC_get_current_ancestor_cgroup_id:
+ return &bpf_get_current_ancestor_cgroup_id_proto;
+#endif
default:
return NULL;
}
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index c58baf9983cc..489942354a90 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1455,10 +1455,6 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
NULL : &bpf_probe_read_compat_str_proto;
#endif
#ifdef CONFIG_CGROUPS
- case BPF_FUNC_get_current_cgroup_id:
- return &bpf_get_current_cgroup_id_proto;
- case BPF_FUNC_get_current_ancestor_cgroup_id:
- return &bpf_get_current_ancestor_cgroup_id_proto;
case BPF_FUNC_cgrp_storage_get:
return &bpf_cgrp_storage_get_proto;
case BPF_FUNC_cgrp_storage_delete:
diff --git a/net/core/filter.c b/net/core/filter.c
index 1d6f165923bf..0f2589ea70f3 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -8144,12 +8144,6 @@ sk_msg_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_sk_storage_delete_proto;
case BPF_FUNC_get_netns_cookie:
return &bpf_get_netns_cookie_sk_msg_proto;
-#ifdef CONFIG_CGROUPS
- case BPF_FUNC_get_current_cgroup_id:
- return &bpf_get_current_cgroup_id_proto;
- case BPF_FUNC_get_current_ancestor_cgroup_id:
- return &bpf_get_current_ancestor_cgroup_id_proto;
-#endif
#ifdef CONFIG_CGROUP_NET_CLASSID
case BPF_FUNC_get_cgroup_classid:
return &bpf_get_cgroup_classid_curr_proto;
--
2.39.2
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