]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
libbpf: Fix bpf_object name determination for bpf_object__open_file()
authorAndrii Nakryiko <andriin@fb.com>
Fri, 22 Nov 2019 00:35:27 +0000 (16:35 -0800)
committerAlexei Starovoitov <ast@kernel.org>
Mon, 25 Nov 2019 00:58:46 +0000 (16:58 -0800)
commit1aace10f41adf1080d1cc54de9b3db98b8b8b0fb
tree36bcf6fb5bbafede18a029dec609d94c9c67bf30
parent071cdecec57fb5d5df78e6a12114ad7bccea5b0e
libbpf: Fix bpf_object name determination for bpf_object__open_file()

If bpf_object__open_file() gets path like "some/dir/obj.o", it should derive
BPF object's name as "obj" (unless overriden through opts->object_name).
Instead, due to using `path` as a fallback value for opts->obj_name, path is
used as is for object name, so for above example BPF object's name will be
verbatim "some/dir/obj", which leads to all sorts of troubles, especially when
internal maps are concern (they are using up to 8 characters of object name).
Fix that by ensuring object_name stays NULL, unless overriden.

Fixes: 291ee02b5e40 ("libbpf: Refactor bpf_object__open APIs to use common opts")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191122003527.551556-1-andriin@fb.com
tools/lib/bpf/libbpf.c