Messages in this thread Patch in this message | | | Date | Sat, 26 Nov 2016 09:10:44 -0800 | From | Alexei Starovoitov <> | Subject | Re: [PATCH v3 01/30] tools lib bpf: Add missing BPF functions |
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On Sat, Nov 26, 2016 at 07:03:25AM +0000, Wang Nan wrote: > Add more BPF map operations to libbpf. Also add bpf_obj_{pin,get}(). They > can be used on not only BPF maps but also BPF programs. > > Signed-off-by: Wang Nan <wangnan0@huawei.com> > Cc: Alexei Starovoitov <ast@fb.com> > Cc: Arnaldo Carvalho de Melo <acme@redhat.com> > Cc: Joe Stringer <joe@ovn.org> > Cc: Li Zefan <lizefan@huawei.com> > --- > tools/lib/bpf/bpf.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++ > tools/lib/bpf/bpf.h | 7 +++++++ > 2 files changed, 63 insertions(+) > > diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c > index 4212ed6..8143536 100644 > --- a/tools/lib/bpf/bpf.c > +++ b/tools/lib/bpf/bpf.c > @@ -110,3 +110,59 @@ int bpf_map_update_elem(int fd, void *key, void *value, > > return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); > } > + > +int bpf_map_lookup_elem(int fd, void *key, void *value) > +{ > + union bpf_attr attr; > + > + bzero(&attr, sizeof(attr)); > + attr.map_fd = fd; > + attr.key = ptr_to_u64(key); > + attr.value = ptr_to_u64(value); > + > + return sys_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); > +}
Acked-by: Alexei Starovoitov <ast@kernel.org>
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