Commit 9780c0ab authored Jul 02, 2017 by Daniel Borkmann Committed by David S. Miller Jul 03, 2017

bpf: export whether tail call has jited owner



We do export through fdinfo already whether a prog is JITed or not,
given a program load can fail in case of either prog or tail call map
has JITed property, but neither both are JITed or not JITed, we can
facilitate error reporting in loaders like iproute2 through exporting
owner_jited of tail call map. We already do export owner_prog_type
through this facility, so parser can pick up both for comparison.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent f96da094

kernel/bpf/syscall.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -216,10 +216,12 @@ static void bpf_map_show_fdinfo(struct seq_file m, struct file filp)
		const struct bpf_map *map = filp->private_data;
		const struct bpf_array *array;
		u32 owner_prog_type = 0;
		u32 owner_jited = 0;

		if (map->map_type == BPF_MAP_TYPE_PROG_ARRAY) {
		array = container_of(map, struct bpf_array, map);
		owner_prog_type = array->owner_prog_type;
		owner_jited = array->owner_jited;
		}

		seq_printf(m,
		@@ -236,9 +238,12 @@ static void bpf_map_show_fdinfo(struct seq_file m, struct file filp)
		map->map_flags,
		map->pages * 1ULL << PAGE_SHIFT);

		if (owner_prog_type)
		if (owner_prog_type) {
		seq_printf(m, "owner_prog_type:\t%u\n",
		owner_prog_type);
		seq_printf(m, "owner_jited:\t%u\n",
		owner_jited);
		}
		}
		#endif

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