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authorAndrey Ignatov <rdna@fb.com>2019-12-18 23:44:36 -0800
committerAlexei Starovoitov <ast@kernel.org>2019-12-19 21:22:25 -0800
commitcdbee3839cd91a4577425c43cf064b9523926159 (patch)
tree8125c9716ca2582a1251363a8cb2a5f4e709fd3d /tools/lib/bpf/libbpf.map
parentbpf: Support replacing cgroup-bpf program in MULTI mode (diff)
downloadlinux-dev-cdbee3839cd91a4577425c43cf064b9523926159.tar.xz
linux-dev-cdbee3839cd91a4577425c43cf064b9523926159.zip
libbpf: Introduce bpf_prog_attach_xattr
Introduce a new bpf_prog_attach_xattr function that, in addition to program fd, target fd and attach type, accepts an extendable struct bpf_prog_attach_opts. bpf_prog_attach_opts relies on DECLARE_LIBBPF_OPTS macro to maintain backward and forward compatibility and has the following "optional" attach attributes: * existing attach_flags, since it's not required when attaching in NONE mode. Even though it's quite often used in MULTI and OVERRIDE mode it seems to be a good idea to reduce number of arguments to bpf_prog_attach_xattr; * newly introduced attribute of BPF_PROG_ATTACH command: replace_prog_fd that is fd of previously attached cgroup-bpf program to replace if BPF_F_REPLACE flag is used. The new function is named to be consistent with other xattr-functions (bpf_prog_test_run_xattr, bpf_create_map_xattr, bpf_load_program_xattr). The struct bpf_prog_attach_opts is supposed to be used with DECLARE_LIBBPF_OPTS macro. Signed-off-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/bd6e0732303eb14e4b79cb128268d9e9ad6db208.1576741281.git.rdna@fb.com
Diffstat (limited to '')
-rw-r--r--tools/lib/bpf/libbpf.map1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index e3a471f38a71..e9713a574243 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -219,6 +219,7 @@ LIBBPF_0.0.7 {
bpf_object__detach_skeleton;
bpf_object__load_skeleton;
bpf_object__open_skeleton;
+ bpf_prog_attach_xattr;
bpf_program__attach;
bpf_program__name;
btf__align_of;