bpf_vprintk functions similarly to BPF_SEQ_PRINTF and BPF_SNPRINTF
macros elsewhere in the file - it allows use of bpf_trace_vprintk
without manual conversion of varargs to u64 array.
Like the bpf_printk macro, bpf_vprintk is meant to be the main interface
to the bpf_trace_vprintk helper and thus is uncapitalized.
Signed-off-by: Dave Marchevsky <davemarchevsky@xxxxxx>
---
tools/lib/bpf/bpf_helpers.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h
index b9987c3efa3c..43c8115956c3 100644
--- a/tools/lib/bpf/bpf_helpers.h
+++ b/tools/lib/bpf/bpf_helpers.h
@@ -224,4 +224,22 @@ enum libbpf_tristate {
___param, sizeof(___param)); \
})
+/*
+ * bpf_vprintk wraps the bpf_trace_printk helper with variadic arguments
+ * instead of an array of u64.
+ */
+#define bpf_vprintk(fmt, args...) \
+({ \
+ static const char ___fmt[] = fmt; \
+ unsigned long long ___param[___bpf_narg(args)]; \
+ \
+ _Pragma("GCC diagnostic push") \
+ _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \
+ ___bpf_fill(___param, args); \
+ _Pragma("GCC diagnostic pop") \
+ \
+ bpf_trace_vprintk(___fmt, sizeof(___fmt), \
+ ___param, sizeof(___param)); \
+})
+
#endif
--
2.30.2
