diff options
| author | Petr Machata <petrm@nvidia.com> | 2021-01-20 18:44:10 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-01-21 08:00:24 +0300 |
| commit | 60f5ad5e19c0996df7ca4ce7ef5fd4596cb13f01 (patch) | |
| tree | 565744f0c246523cda001f9699d5fdf376e2926d /net/ipv4 | |
| parent | 646188c9550f74454dfc172a347dad693e5bfc84 (diff) | |
| download | linux-60f5ad5e19c0996df7ca4ce7ef5fd4596cb13f01.tar.xz | |
nexthop: Use a dedicated policy for nh_valid_get_del_req()
This function uses the global nexthop policy only to then bounce all
arguments except for NHA_ID. Instead, just create a new policy that
only includes the one allowed attribute.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/nexthop.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index e53e43aef785..391079ff1bb5 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -36,6 +36,10 @@ static const struct nla_policy rtm_nh_policy[NHA_MAX + 1] = { [NHA_FDB] = { .type = NLA_FLAG }, }; +static const struct nla_policy rtm_nh_policy_get[] = { + [NHA_ID] = { .type = NLA_U32 }, +}; + static bool nexthop_notifiers_is_empty(struct net *net) { return !net->nexthop.notifier_chain.head; @@ -1842,28 +1846,16 @@ static int nh_valid_get_del_req(struct nlmsghdr *nlh, u32 *id, struct netlink_ext_ack *extack) { struct nhmsg *nhm = nlmsg_data(nlh); - struct nlattr *tb[NHA_MAX + 1]; - int err, i; + struct nlattr *tb[ARRAY_SIZE(rtm_nh_policy_get)]; + int err; - err = nlmsg_parse(nlh, sizeof(*nhm), tb, NHA_MAX, rtm_nh_policy, - extack); + err = nlmsg_parse(nlh, sizeof(*nhm), tb, + ARRAY_SIZE(rtm_nh_policy_get) - 1, + rtm_nh_policy_get, extack); if (err < 0) return err; err = -EINVAL; - for (i = 0; i < __NHA_MAX; ++i) { - if (!tb[i]) - continue; - - switch (i) { - case NHA_ID: - break; - default: - NL_SET_ERR_MSG_ATTR(extack, tb[i], - "Unexpected attribute in request"); - goto out; - } - } if (nhm->nh_protocol || nhm->resvd || nhm->nh_scope || nhm->nh_flags) { NL_SET_ERR_MSG(extack, "Invalid values in header"); goto out; |