diff options
Diffstat (limited to 'tools/lib/bpf/nlattr.c')
| -rw-r--r-- | tools/lib/bpf/nlattr.c | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/tools/lib/bpf/nlattr.c b/tools/lib/bpf/nlattr.c index 4719434278b2..49f514119bdb 100644 --- a/tools/lib/bpf/nlattr.c +++ b/tools/lib/bpf/nlattr.c @@ -26,11 +26,6 @@ static uint16_t nla_attr_minlen[NLA_TYPE_MAX+1] = { [NLA_FLAG] = 0, }; -static int nla_len(const struct nlattr *nla) -{ - return nla->nla_len - NLA_HDRLEN; -} - static struct nlattr *nla_next(const struct nlattr *nla, int *remaining) { int totlen = NLA_ALIGN(nla->nla_len); @@ -46,11 +41,6 @@ static int nla_ok(const struct nlattr *nla, int remaining) nla->nla_len <= remaining; } -static void *nla_data(const struct nlattr *nla) -{ - return (char *) nla + NLA_HDRLEN; -} - static int nla_type(const struct nlattr *nla) { return nla->nla_type & NLA_TYPE_MASK; @@ -114,8 +104,8 @@ static inline int nlmsg_len(const struct nlmsghdr *nlh) * @see nla_validate * @return 0 on success or a negative error code. */ -static int nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head, int len, - struct nla_policy *policy) +int nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head, int len, + struct nla_policy *policy) { struct nlattr *nla; int rem, err; @@ -146,6 +136,25 @@ errout: return err; } +/** + * Create attribute index based on nested attribute + * @arg tb Index array to be filled (maxtype+1 elements). + * @arg maxtype Maximum attribute type expected and accepted. + * @arg nla Nested Attribute. + * @arg policy Attribute validation policy. + * + * Feeds the stream of attributes nested into the specified attribute + * to nla_parse(). + * + * @see nla_parse + * @return 0 on success or a negative error code. + */ +int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, + struct nla_policy *policy) +{ + return nla_parse(tb, maxtype, nla_data(nla), nla_len(nla), policy); +} + /* dump netlink extended ack error message */ int nla_dump_errormsg(struct nlmsghdr *nlh) { |