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| author | Kui-Feng Lee <thinker.li@gmail.com> | 2023-04-19 17:28:21 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-04-21 11:10:10 -0700 |
| commit | 0232b788978652571c4f4e57dc26ff8e4837926a (patch) | |
| tree | 96f9779db401ce754b781c8bd47eda57cacd4c24 /tools/bpf/bpftool/prog.c | |
| parent | 833d67ecdc5f35f1ebf59d0fccc1ce771434be9c (diff) | |
| download | linux-0232b788978652571c4f4e57dc26ff8e4837926a.tar.gz linux-0232b788978652571c4f4e57dc26ff8e4837926a.tar.bz2 linux-0232b788978652571c4f4e57dc26ff8e4837926a.zip | |
bpftool: Register struct_ops with a link.
You can include an optional path after specifying the object name for the
'struct_ops register' subcommand.
Since the commit 226bc6ae6405 ("Merge branch 'Transit between BPF TCP
congestion controls.'") has been accepted, it is now possible to create a
link for a struct_ops. This can be done by defining a struct_ops in
SEC(".struct_ops.link") to make libbpf returns a real link. If we don't pin
the links before leaving bpftool, they will disappear. To instruct bpftool
to pin the links in a directory with the names of the maps, we need to
provide the path of that directory.
Signed-off-by: Kui-Feng Lee <kuifeng@meta.com>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/r/20230420002822.345222-1-kuifeng@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
| -rw-r--r-- | tools/bpf/bpftool/prog.c | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index e5b613a7974c..91b6075b2db3 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -1476,19 +1476,6 @@ auto_attach_program(struct bpf_program *prog, const char *path) return err; } -static int pathname_concat(char *buf, size_t buf_sz, const char *path, const char *name) -{ - int len; - - len = snprintf(buf, buf_sz, "%s/%s", path, name); - if (len < 0) - return -EINVAL; - if ((size_t)len >= buf_sz) - return -ENAMETOOLONG; - - return 0; -} - static int auto_attach_programs(struct bpf_object *obj, const char *path) { |