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samples: bpf: Refactor XDP kern program maps with BTF-defined map

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Most of the samples were converted to use the new BTF-defined MAP as
they moved to libbpf, but some of the samples were missing.

Instead of using the previous BPF MAP definition, this commit refactors
xdp_monitor and xdp_sample_pkts_kern MAP definition with the new
BTF-defined MAP format.

Also, this commit removes the max_entries attribute at PERF_EVENT_ARRAY
map type. The libbpf's bpf_object__create_map() will automatically
set max_entries to the maximum configured number of CPUs on the host.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20201010181734.1109-4-danieltimlee@gmail.com
This commit is contained in:
Daniel T. Lee
2020-10-11 03:17:34 +09:00
committed by Alexei Starovoitov
parent 151936bf51
commit 321f632450
3 changed files with 35 additions and 38 deletions
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samples/bpf/xdp_sample_pkts_user.c
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@@ -18,7 +18,6 @@
#include "perf-sys.h"
#define MAX_CPUS 128
static int if_idx;
static char *if_name;
static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;