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Message-ID: <1457416641-306326-7-git-send-email-ast@fb.com>
Date: Mon, 7 Mar 2016 21:57:18 -0800
From: Alexei Starovoitov <ast@...com>
To: "David S . Miller" <davem@...emloft.net>
CC: Daniel Borkmann <daniel@...earbox.net>,
Daniel Wagner <daniel.wagner@...-carit.de>,
Tom Zanussi <tom.zanussi@...ux.intel.com>,
Wang Nan <wangnan0@...wei.com>, He Kuang <hekuang@...wei.com>,
Martin KaFai Lau <kafai@...com>,
Brendan Gregg <brendan.d.gregg@...il.com>,
<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<kernel-team@...com>
Subject: [PATCH v2 net-next 06/12] samples/bpf: make map creation more verbose
map creation is typically the first one to fail when rlimits are
too low, not enough memory, etc
Make this failure scenario more verbose
Signed-off-by: Alexei Starovoitov <ast@...nel.org>
---
samples/bpf/bpf_load.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index da86a8e0a95a..816bca5760a0 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -158,8 +158,11 @@ static int load_maps(struct bpf_map_def *maps, int len)
maps[i].key_size,
maps[i].value_size,
maps[i].max_entries);
- if (map_fd[i] < 0)
+ if (map_fd[i] < 0) {
+ printf("failed to create a map: %d %s\n",
+ errno, strerror(errno));
return 1;
+ }
if (maps[i].type == BPF_MAP_TYPE_PROG_ARRAY)
prog_array_fd = map_fd[i];
--
2.8.0.rc1
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