netdev - [PATCH bpf-next 03/10] tools/bpf: handle __MAX_BPF_(PROG|MAP)

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Message-ID: <1895f7dfe2a8067f6397ff565edf20130a28aa91.1567024943.git.hex@fb.com>
Date:   Wed, 28 Aug 2019 14:03:06 -0700
From:   Julia Kartseva <hex@...com>
To:     <rdna@...com>, <bpf@...r.kernel.org>, <ast@...nel.org>,
        <daniel@...earbox.net>, <netdev@...r.kernel.org>,
        <kernel-team@...com>
CC:     Julia Kartseva <hex@...com>
Subject: [PATCH bpf-next 03/10] tools/bpf: handle __MAX_BPF_(PROG|MAP)_TYPE in switch statements

Add cases to switch statements in probe_load, bpf_prog_type__needs_kver
bpf_probe_map_type to fix enumeration value not handled in switch
compilation error.
prog_type_name array in bpftool/main.h doesn't have __MAX_BPF_PROG_TYPE
entity, same for map, so probe won't be called.

Signed-off-by: Julia Kartseva <hex@...com>
---
 tools/lib/bpf/libbpf.c        | 1 +
 tools/lib/bpf/libbpf_probes.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 2233f919dd88..72e6e5eb397f 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -3580,6 +3580,7 @@ static bool bpf_prog_type__needs_kver(enum bpf_prog_type type)
 	case BPF_PROG_TYPE_PERF_EVENT:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
 	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
+	case __MAX_BPF_PROG_TYPE:
 		return false;
 	case BPF_PROG_TYPE_KPROBE:
 	default:
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 4b0b0364f5fc..8f2ba6a457ac 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -102,6 +102,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
 	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
+	case __MAX_BPF_PROG_TYPE:
 	default:
 		break;
 	}
@@ -250,6 +251,7 @@ bool bpf_probe_map_type(enum bpf_map_type map_type, __u32 ifindex)
 	case BPF_MAP_TYPE_XSKMAP:
 	case BPF_MAP_TYPE_SOCKHASH:
 	case BPF_MAP_TYPE_REUSEPORT_SOCKARRAY:
+	case __MAX_BPF_MAP_TYPE:
 	default:
 		break;
 	}
-- 
2.17.1