From: Tobias Klauser tklauser@distanz.ch
[ Upstream commit 61ca36c8c4eb3bae35a285b1ae18c514cde65439 ]
!perfmon_capable() is checked before the last switch(func_id) in bpf_base_func_proto. Thus, the cases BPF_FUNC_trace_printk and BPF_FUNC_snprintf_btf can be moved to that last switch(func_id) to omit the inline !perfmon_capable() checks.
Signed-off-by: Tobias Klauser tklauser@distanz.ch Signed-off-by: Daniel Borkmann daniel@iogearbox.net Link: https://lore.kernel.org/bpf/20210127174615.3038-1-tklauser@distanz.ch Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/bpf/helpers.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index c489430cac78..d0fc091d2ab4 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -707,14 +707,6 @@ bpf_base_func_proto(enum bpf_func_id func_id) return &bpf_spin_lock_proto; case BPF_FUNC_spin_unlock: return &bpf_spin_unlock_proto; - case BPF_FUNC_trace_printk: - if (!perfmon_capable()) - return NULL; - return bpf_get_trace_printk_proto(); - case BPF_FUNC_snprintf_btf: - if (!perfmon_capable()) - return NULL; - return &bpf_snprintf_btf_proto; case BPF_FUNC_jiffies64: return &bpf_jiffies64_proto; case BPF_FUNC_per_cpu_ptr: @@ -729,6 +721,8 @@ bpf_base_func_proto(enum bpf_func_id func_id) return NULL;
switch (func_id) { + case BPF_FUNC_trace_printk: + return bpf_get_trace_printk_proto(); case BPF_FUNC_get_current_task: return &bpf_get_current_task_proto; case BPF_FUNC_probe_read_user: @@ -739,6 +733,8 @@ bpf_base_func_proto(enum bpf_func_id func_id) return &bpf_probe_read_user_str_proto; case BPF_FUNC_probe_read_kernel_str: return &bpf_probe_read_kernel_str_proto; + case BPF_FUNC_snprintf_btf: + return &bpf_snprintf_btf_proto; default: return NULL; }