diff mbox series

[5.17,0698/1126] bpftool: Fix print error when show bpf map

Message ID 20220405070428.096755911@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 5, 2022, 7:24 a.m. UTC 
From: Yafang Shao <laoar.shao@gmail.com>

[ Upstream commit 1824d8ea75f275a5e69e5f6bc0ffe122ea9b938c ]

If there is no btf_id or frozen, it will not show the pids, but the pids don't
depend on any one of them.

Below is the result after this change:

  $ ./bpftool map show
  2: lpm_trie  flags 0x1
	key 8B  value 8B  max_entries 1  memlock 4096B
	pids systemd(1)
  3: lpm_trie  flags 0x1
	key 20B  value 8B  max_entries 1  memlock 4096B
	pids systemd(1)

While before this change, the 'pids systemd(1)' can't be displayed.

Fixes: 9330986c0300 ("bpf: Add bloom filter map implementation")
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220320060815.7716-1-laoar.shao@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/bpf/bpftool/map.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
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Patch

diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index e746642de292..0bba33729c7f 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -620,17 +620,14 @@  static int show_map_close_plain(int fd, struct bpf_map_info *info)
 					    u32_as_hash_field(info->id))
 			printf("\n\tpinned %s", (char *)entry->value);
 	}
-	printf("\n");
 
 	if (frozen_str) {
 		frozen = atoi(frozen_str);
 		free(frozen_str);
 	}
 
-	if (!info->btf_id && !frozen)
-		return 0;
-
-	printf("\t");
+	if (info->btf_id || frozen)
+		printf("\n\t");
 
 	if (info->btf_id)
 		printf("btf_id %d", info->btf_id);