[PATCH bpf-next v3 03/15] bpf: support 'X' in bpf_seq_printf() helper

[Yonghong Song]

'X' tells kernel to print hex with upper case letters.
/proc/net/tcp{4,6} seq_file show() used this, and
supports it in bpf_seq_printf() helper too.

Acked-by: Martin KaFai Lau <ka...@fb.com>
Signed-off-by: Yonghong Song <y...@fb.com>
---
 kernel/trace/bpf_trace.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index e729c9e587a0..dbee30e2ad91 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -681,7 +681,8 @@ BPF_CALL_5(bpf_seq_printf, struct seq_file *, m, char *, 
fmt, u32, fmt_size,
                }
 
                if (fmt[i] != 'i' && fmt[i] != 'd' &&
-                   fmt[i] != 'u' && fmt[i] != 'x') {
+                   fmt[i] != 'u' && fmt[i] != 'x' &&
+                   fmt[i] != 'X') {
                        err = -EINVAL;
                        goto out;
                }
-- 
2.24.1