lib/bpf/nlattr.c

1 // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
4  * NETLINK      Netlink attributes
6  * Copyright (c) 2003-2013 Thomas Graf <tgraf@suug.ch>
27 	int totlen = NLA_ALIGN(nla->nla_len);  in nla_next()
29 	*remaining -= totlen;  in nla_next()
36 	       nla->nla_len >= sizeof(*nla) &&  in nla_ok()
37 	       nla->nla_len <= remaining;  in nla_ok()
42 	return nla->nla_type & NLA_TYPE_MASK;  in nla_type()
57 	if (pt->type > LIBBPF_NLA_TYPE_MAX)  in validate_nla()
60 	if (pt->minlen)  in validate_nla()
61 		minlen = pt->minlen;  in validate_nla()
62 	else if (pt->type != LIBBPF_NLA_UNSPEC)  in validate_nla()
63 		minlen = nla_attr_minlen[pt->type];  in validate_nla()
66 		return -1;  in validate_nla()
68 	if (pt->maxlen && libbpf_nla_len(nla) > pt->maxlen)  in validate_nla()
69 		return -1;  in validate_nla()
71 	if (pt->type == LIBBPF_NLA_STRING) {  in validate_nla()
74 		if (data[libbpf_nla_len(nla) - 1] != '\0')  in validate_nla()
75 			return -1;  in validate_nla()
83 	return nlh->nlmsg_len - NLMSG_HDRLEN;  in nlmsg_len()
87  * Create attribute index based on a stream of attributes.
94  * Iterates over the stream of attributes and stores a pointer to each
137  * Create attribute index based on nested attribute
140  * @arg nla             Nested Attribute.
143  * Feeds the stream of attributes nested into the specified attribute
170 	if (!(nlh->nlmsg_flags & NLM_F_ACK_TLVS))  in libbpf_nla_dump_errormsg()
177 	if (!(nlh->nlmsg_flags & NLM_F_CAPPED))  in libbpf_nla_dump_errormsg()
178 		hlen += nlmsg_len(&err->msg);  in libbpf_nla_dump_errormsg()
181 	alen = (void *)nlh + nlh->nlmsg_len - (void *)attr;  in libbpf_nla_dump_errormsg()
185 		pr_warn("Failed to parse extended error attributes\n");  in libbpf_nla_dump_errormsg()