From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
Andrii Nakryiko <andrii.nakryiko@gmail.com>,
David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: [PATCH bpf-next v2 6/6] libbpf: Add getter for program size
Date: Fri, 08 Nov 2019 22:33:11 +0100 [thread overview]
Message-ID: <157324879178.910124.2574532467255490597.stgit@toke.dk> (raw)
In-Reply-To: <157324878503.910124.12936814523952521484.stgit@toke.dk>
From: Toke Høiland-Jørgensen <toke@redhat.com>
This adds a new getter for the BPF program size (in bytes). This is useful
for a caller that is trying to predict how much memory will be locked by
loading a BPF object into the kernel.
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
---
tools/lib/bpf/libbpf.c | 5 +++++
tools/lib/bpf/libbpf.h | 1 +
tools/lib/bpf/libbpf.map | 1 +
3 files changed, 7 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 582c0fd16697..facd5e1a3a0b 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -4790,6 +4790,11 @@ int bpf_program__fd(const struct bpf_program *prog)
return bpf_program__nth_fd(prog, 0);
}
+size_t bpf_program__size(const struct bpf_program *prog)
+{
+ return prog->insns_cnt * sizeof(struct bpf_insn);
+}
+
int bpf_program__set_prep(struct bpf_program *prog, int nr_instances,
bpf_program_prep_t prep)
{
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index f0947cc949d2..10875dc68ec8 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -213,6 +213,7 @@ LIBBPF_API void bpf_program__set_ifindex(struct bpf_program *prog,
LIBBPF_API const char *bpf_program__title(const struct bpf_program *prog,
bool needs_copy);
+LIBBPF_API size_t bpf_program__size(const struct bpf_program *prog);
LIBBPF_API int bpf_program__load(struct bpf_program *prog, char *license,
__u32 kern_version);
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index d1a782a3a58d..9f39ee06b2d4 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -203,4 +203,5 @@ LIBBPF_0.0.6 {
bpf_program__get_type;
bpf_program__is_tracing;
bpf_program__set_tracing;
+ bpf_program__size;
} LIBBPF_0.0.5;
next prev parent reply other threads:[~2019-11-08 21:33 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-08 21:33 [PATCH bpf-next v2 0/6] libbpf: Fix pinning and error message bugs and add new getters Toke Høiland-Jørgensen
2019-11-08 21:33 ` [PATCH bpf-next v2 1/6] libbpf: Unpin auto-pinned maps if loading fails Toke Høiland-Jørgensen
2019-11-08 21:41 ` David Miller
2019-11-08 22:40 ` Andrii Nakryiko
2019-11-08 23:33 ` Toke Høiland-Jørgensen
2019-11-08 23:35 ` Andrii Nakryiko
2019-11-08 21:33 ` [PATCH bpf-next v2 2/6] selftests/bpf: Add tests for automatic map unpinning on load failure Toke Høiland-Jørgensen
2019-11-08 21:41 ` David Miller
2019-11-08 22:00 ` Song Liu
2019-11-08 22:43 ` Andrii Nakryiko
2019-11-08 21:33 ` [PATCH bpf-next v2 3/6] libbpf: Propagate EPERM to caller on program load Toke Høiland-Jørgensen
2019-11-08 21:43 ` David Miller
2019-11-08 22:50 ` Andrii Nakryiko
2019-11-08 23:17 ` Alexei Starovoitov
2019-11-08 23:32 ` Toke Høiland-Jørgensen
2019-11-08 21:33 ` [PATCH bpf-next v2 4/6] libbpf: Use pr_warn() when printing netlink errors Toke Høiland-Jørgensen
2019-11-08 21:43 ` David Miller
2019-11-08 22:52 ` Andrii Nakryiko
2019-11-08 21:33 ` [PATCH bpf-next v2 5/6] libbpf: Add bpf_get_link_xdp_info() function to get more XDP information Toke Høiland-Jørgensen
2019-11-08 21:43 ` David Miller
2019-11-08 23:10 ` Andrii Nakryiko
2019-11-08 21:33 ` Toke Høiland-Jørgensen [this message]
2019-11-08 21:43 ` [PATCH bpf-next v2 6/6] libbpf: Add getter for program size David Miller
2019-11-08 23:16 ` Andrii Nakryiko
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