Commit 082c4bfb authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Alexei Starovoitov
Browse files

libbpf: Add SEC name for xdp frags programs 



Introduce support for the following SEC entries for XDP frags
property:
- SEC("xdp.frags")
- SEC("xdp.frags/devmap")
- SEC("xdp.frags/cpumap")

Acked-by: default avatarToke Hoiland-Jorgensen <toke@redhat.com>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/af23b6e4841c171ad1af01917839b77847a4bc27.1642758637.git.lorenzo@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 11022108

tools/lib/bpf/libbpf.c

+8 −0
Original line number Diff line number Diff line
@@ -235,6 +235,8 @@ enum sec_def_flags { 
	SEC_SLEEPABLE = 8,

	/* allow non-strict prefix matching */

	SEC_SLOPPY_PFX = 16,

	/* BPF program support non-linear XDP buffer */

	SEC_XDP_FRAGS = 32,

};



struct bpf_sec_def {
@@ -6570,6 +6572,9 @@ static int libbpf_preload_prog(struct bpf_program *prog, 
	if (def & SEC_SLEEPABLE)

		opts->prog_flags |= BPF_F_SLEEPABLE;



	if (prog->type == BPF_PROG_TYPE_XDP && (def & SEC_XDP_FRAGS))

		opts->prog_flags |= BPF_F_XDP_HAS_FRAGS;



	if ((prog->type == BPF_PROG_TYPE_TRACING ||

	     prog->type == BPF_PROG_TYPE_LSM ||

	     prog->type == BPF_PROG_TYPE_EXT) && !prog->attach_btf_id) {
@@ -8608,8 +8613,11 @@ static const struct bpf_sec_def section_defs[] = { 
	SEC_DEF("lsm.s/",		LSM, BPF_LSM_MAC, SEC_ATTACH_BTF | SEC_SLEEPABLE, attach_lsm),

	SEC_DEF("iter/",		TRACING, BPF_TRACE_ITER, SEC_ATTACH_BTF, attach_iter),

	SEC_DEF("syscall",		SYSCALL, 0, SEC_SLEEPABLE),

	SEC_DEF("xdp.frags/devmap",	XDP, BPF_XDP_DEVMAP, SEC_XDP_FRAGS),

	SEC_DEF("xdp_devmap/",		XDP, BPF_XDP_DEVMAP, SEC_ATTACHABLE),

	SEC_DEF("xdp.frags/cpumap",	XDP, BPF_XDP_CPUMAP, SEC_XDP_FRAGS),

	SEC_DEF("xdp_cpumap/",		XDP, BPF_XDP_CPUMAP, SEC_ATTACHABLE),

	SEC_DEF("xdp.frags",		XDP, BPF_XDP, SEC_XDP_FRAGS),

	SEC_DEF("xdp",			XDP, BPF_XDP, SEC_ATTACHABLE_OPT | SEC_SLOPPY_PFX),

	SEC_DEF("perf_event",		PERF_EVENT, 0, SEC_NONE | SEC_SLOPPY_PFX),

	SEC_DEF("lwt_in",		LWT_IN, 0, SEC_NONE | SEC_SLOPPY_PFX),