tools/bpf/bpftool/netlink_dumper.c

Source file repositories/reference/linux-study-clean/tools/bpf/bpftool/netlink_dumper.c

File Facts

System
Linux kernel
Corpus path
tools/bpf/bpftool/netlink_dumper.c
Extension
.c
Size
4343 bytes
Lines
179
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (json_output) {
			jsonw_name(json_wtr, "multi_attachments");
			jsonw_start_array(json_wtr);
		}
		xdp_dump_prog_id(tb, IFLA_XDP_SKB_PROG_ID, "generic", true);
		xdp_dump_prog_id(tb, IFLA_XDP_DRV_PROG_ID, "driver", true);
		xdp_dump_prog_id(tb, IFLA_XDP_HW_PROG_ID, "offload", true);
		if (json_output)
			jsonw_end_array(json_wtr);
	} else if (mode == XDP_ATTACHED_DRV) {
		xdp_dump_prog_id(tb, IFLA_XDP_PROG_ID, "driver", false);
	} else if (mode == XDP_ATTACHED_SKB) {
		xdp_dump_prog_id(tb, IFLA_XDP_PROG_ID, "generic", false);
	} else if (mode == XDP_ATTACHED_HW) {
		xdp_dump_prog_id(tb, IFLA_XDP_PROG_ID, "offload", false);
	}

	NET_END_OBJECT_FINAL;
	return 0;
}

int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb)
{
	if (!tb[IFLA_XDP])
		return 0;

	return do_xdp_dump_one(tb[IFLA_XDP], (unsigned int)ifinfo->ifi_index,
			       libbpf_nla_getattr_str(tb[IFLA_IFNAME]));
}

static int do_bpf_dump_one_act(struct nlattr *attr)
{
	struct nlattr *tb[TCA_ACT_BPF_MAX + 1];

	if (libbpf_nla_parse_nested(tb, TCA_ACT_BPF_MAX, attr, NULL) < 0)
		return -LIBBPF_ERRNO__NLPARSE;

	if (!tb[TCA_ACT_BPF_PARMS])
		return -LIBBPF_ERRNO__NLPARSE;

	NET_START_OBJECT_NESTED2;
	if (tb[TCA_ACT_BPF_NAME])
		NET_DUMP_STR("name", "%s",
			     libbpf_nla_getattr_str(tb[TCA_ACT_BPF_NAME]));
	if (tb[TCA_ACT_BPF_ID])
		NET_DUMP_UINT("id", " id %u",
			      libbpf_nla_getattr_u32(tb[TCA_ACT_BPF_ID]));
	NET_END_OBJECT_NESTED;
	return 0;
}

static int do_dump_one_act(struct nlattr *attr)
{
	struct nlattr *tb[TCA_ACT_MAX + 1];

	if (!attr)
		return 0;

	if (libbpf_nla_parse_nested(tb, TCA_ACT_MAX, attr, NULL) < 0)
		return -LIBBPF_ERRNO__NLPARSE;

	if (tb[TCA_ACT_KIND] &&
	    strcmp(libbpf_nla_data(tb[TCA_ACT_KIND]), "bpf") == 0)
		return do_bpf_dump_one_act(tb[TCA_ACT_OPTIONS]);

	return 0;
}

static int do_bpf_act_dump(struct nlattr *attr)
{
	struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
	int act, ret;

	if (libbpf_nla_parse_nested(tb, TCA_ACT_MAX_PRIO, attr, NULL) < 0)
		return -LIBBPF_ERRNO__NLPARSE;

	NET_START_ARRAY("act", " %s [");
	for (act = 0; act <= TCA_ACT_MAX_PRIO; act++) {
		ret = do_dump_one_act(tb[act]);
		if (ret)
			break;
	}
	NET_END_ARRAY("] ");

	return ret;
}

static int do_bpf_filter_dump(struct nlattr *attr)
{
	struct nlattr *tb[TCA_BPF_MAX + 1];

Annotation

Implementation Notes