Re: [PATCH bpf-next v2] bpftool: Check argc first before "file" in do_batch()

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On 11/15, Tiezhu Yang wrote:
If the parameters for batch are more than 2, check argc first can
return immediately, no need to use is_prefix() to check "file" with
a little overhead and then check argc, it is better to check "file"
only when the parameters for batch are 2.

Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>

Acked-by: Stanislav Fomichev <sdf@xxxxxxxxxx>

---
  tools/bpf/bpftool/main.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 741e50e..337ab79 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -337,12 +337,12 @@ static int do_batch(int argc, char **argv)
  	if (argc < 2) {
  		p_err("too few parameters for batch");
  		return -1;
-	} else if (!is_prefix(*argv, "file")) {
-		p_err("expected 'file', got: %s", *argv);
-		return -1;
  	} else if (argc > 2) {
  		p_err("too many parameters for batch");
  		return -1;
+	} else if (!is_prefix(*argv, "file")) {
+		p_err("expected 'file', got: %s", *argv);
+		return -1;
  	}
  	NEXT_ARG();

--
2.1.0




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