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Subject[PATCH 4/8] tools lib bpf: export function to set type
Date
Current API was not allowing the user to set a type like socket
filter. To avoid a setter function for each type, the patch simply
exports a set function that takes the type in parameter.

Signed-off-by: Eric Leblond <eric@regit.org>
---
tools/lib/bpf/libbpf.c | 19 +++++++++----------
tools/lib/bpf/libbpf.h | 3 +++
2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 90932f1..7cd341e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1336,26 +1336,25 @@ int bpf_program__nth_fd(struct bpf_program *prog, int n)
return fd;
}

-static void bpf_program__set_type(struct bpf_program *prog,
- enum bpf_prog_type type)
+int bpf_program__set_type(struct bpf_program *prog, unsigned int type)
{
+ if (!prog)
+ return -EINVAL;
+ if (type >= __MAX_BPF_PROG_TYPE)
+ return -EINVAL;
+
prog->type = type;
+ return 0;
}

int bpf_program__set_tracepoint(struct bpf_program *prog)
{
- if (!prog)
- return -EINVAL;
- bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
- return 0;
+ return bpf_program__set_type(prog, BPF_PROG_TYPE_TRACEPOINT);
}

int bpf_program__set_kprobe(struct bpf_program *prog)
{
- if (!prog)
- return -EINVAL;
- bpf_program__set_type(prog, BPF_PROG_TYPE_KPROBE);
- return 0;
+ return bpf_program__set_type(prog, BPF_PROG_TYPE_KPROBE);
}

static bool bpf_program__is_type(struct bpf_program *prog,
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index e40c8d3..a18783b 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -173,6 +173,9 @@ int bpf_program__set_kprobe(struct bpf_program *prog);
bool bpf_program__is_tracepoint(struct bpf_program *prog);
bool bpf_program__is_kprobe(struct bpf_program *prog);

+int bpf_program__set_type(struct bpf_program *prog,
+ unsigned int type);
+
/*
* We don't need __attribute__((packed)) now since it is
* unnecessary for 'bpf_map_def' because they are all aligned.
--
2.9.3
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