Add map_flags attribute to bpf_map_show_fdinfo(), so that tools like
tc can check for them when loading objects from a pinned entry, e.g.
if user intent wrt allocation (BPF_F_NO_PREALLOC) is different to the
pinned object, it can bail out. Follow-up to 6c9059817432 ("bpf:
pre-allocate hash map elements"), so that tc can still support this
with v4.6.
Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
Acked-by: Alexei Starovoitov <a...@kernel.org>
---
kernel/bpf/syscall.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 2a2efe1..adc5e4b 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -137,11 +137,13 @@ static void bpf_map_show_fdinfo(struct seq_file *m,
struct file *filp)
"map_type:\t%u\n"
"key_size:\t%u\n"
"value_size:\t%u\n"
- "max_entries:\t%u\n",
+ "max_entries:\t%u\n"
+ "map_flags:\t%#x\n",
map->map_type,
map->key_size,
map->value_size,
- map->max_entries);
+ map->max_entries,
+ map->map_flags);
}
#endif
--
1.9.3
