840 lines
22 KiB
C
840 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016, Amir Vadai <amir@vadai.me>
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* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <net/geneve.h>
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#include <net/vxlan.h>
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#include <net/erspan.h>
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#include <net/netlink.h>
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#include <net/pkt_sched.h>
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#include <net/dst.h>
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#include <net/pkt_cls.h>
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#include <linux/tc_act/tc_tunnel_key.h>
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#include <net/tc_act/tc_tunnel_key.h>
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static unsigned int tunnel_key_net_id;
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static struct tc_action_ops act_tunnel_key_ops;
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static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
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struct tcf_result *res)
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{
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struct tcf_tunnel_key *t = to_tunnel_key(a);
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struct tcf_tunnel_key_params *params;
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int action;
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params = rcu_dereference_bh(t->params);
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tcf_lastuse_update(&t->tcf_tm);
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tcf_action_update_bstats(&t->common, skb);
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action = READ_ONCE(t->tcf_action);
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switch (params->tcft_action) {
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case TCA_TUNNEL_KEY_ACT_RELEASE:
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skb_dst_drop(skb);
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break;
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case TCA_TUNNEL_KEY_ACT_SET:
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skb_dst_drop(skb);
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skb_dst_set(skb, dst_clone(¶ms->tcft_enc_metadata->dst));
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break;
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default:
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WARN_ONCE(1, "Bad tunnel_key action %d.\n",
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params->tcft_action);
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break;
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}
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return action;
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}
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static const struct nla_policy
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enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
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[TCA_TUNNEL_KEY_ENC_OPTS_UNSPEC] = {
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.strict_start_type = TCA_TUNNEL_KEY_ENC_OPTS_VXLAN },
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[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
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[TCA_TUNNEL_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED },
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[TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED },
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};
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static const struct nla_policy
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geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
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[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
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[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
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[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
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.len = 128 },
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};
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static const struct nla_policy
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vxlan_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX + 1] = {
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[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 },
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};
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static const struct nla_policy
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erspan_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
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[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 },
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[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 },
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[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 },
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[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 },
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};
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static int
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tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
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int err, data_len, opt_len;
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u8 *data;
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err = nla_parse_nested_deprecated(tb,
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TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
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nla, geneve_opt_policy, extack);
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if (err < 0)
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return err;
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if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
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!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
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!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
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NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
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return -EINVAL;
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}
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data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
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data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
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if (data_len < 4) {
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NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
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return -ERANGE;
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}
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if (data_len % 4) {
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NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
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return -ERANGE;
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}
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opt_len = sizeof(struct geneve_opt) + data_len;
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if (dst) {
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struct geneve_opt *opt = dst;
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WARN_ON(dst_len < opt_len);
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opt->opt_class =
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nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
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opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
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opt->length = data_len / 4; /* length is in units of 4 bytes */
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opt->r1 = 0;
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opt->r2 = 0;
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opt->r3 = 0;
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memcpy(opt + 1, data, data_len);
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}
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return opt_len;
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}
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static int
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tunnel_key_copy_vxlan_opt(const struct nlattr *nla, void *dst, int dst_len,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX + 1];
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int err;
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err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX, nla,
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vxlan_opt_policy, extack);
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if (err < 0)
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return err;
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if (!tb[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP]) {
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NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
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return -EINVAL;
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}
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if (dst) {
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struct vxlan_metadata *md = dst;
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md->gbp = nla_get_u32(tb[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP]);
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}
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return sizeof(struct vxlan_metadata);
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}
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static int
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tunnel_key_copy_erspan_opt(const struct nlattr *nla, void *dst, int dst_len,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX + 1];
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int err;
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u8 ver;
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err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX, nla,
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erspan_opt_policy, extack);
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if (err < 0)
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return err;
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if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER]) {
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NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
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return -EINVAL;
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}
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ver = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER]);
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if (ver == 1) {
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if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX]) {
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NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
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return -EINVAL;
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}
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} else if (ver == 2) {
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if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR] ||
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!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID]) {
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NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
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return -EINVAL;
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}
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} else {
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NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
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return -EINVAL;
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}
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if (dst) {
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struct erspan_metadata *md = dst;
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md->version = ver;
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if (ver == 1) {
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nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX];
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md->u.index = nla_get_be32(nla);
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} else {
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nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR];
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md->u.md2.dir = nla_get_u8(nla);
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nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID];
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set_hwid(&md->u.md2, nla_get_u8(nla));
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}
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}
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return sizeof(struct erspan_metadata);
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}
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static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
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int dst_len, struct netlink_ext_ack *extack)
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{
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int err, rem, opt_len, len = nla_len(nla), opts_len = 0, type = 0;
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const struct nlattr *attr, *head = nla_data(nla);
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err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
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enc_opts_policy, extack);
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if (err)
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return err;
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nla_for_each_attr(attr, head, len, rem) {
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switch (nla_type(attr)) {
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case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
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if (type && type != TUNNEL_GENEVE_OPT) {
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NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
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return -EINVAL;
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}
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opt_len = tunnel_key_copy_geneve_opt(attr, dst,
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dst_len, extack);
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if (opt_len < 0)
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return opt_len;
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opts_len += opt_len;
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if (opts_len > IP_TUNNEL_OPTS_MAX) {
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NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
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return -EINVAL;
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}
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if (dst) {
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dst_len -= opt_len;
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dst += opt_len;
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}
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type = TUNNEL_GENEVE_OPT;
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break;
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case TCA_TUNNEL_KEY_ENC_OPTS_VXLAN:
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if (type) {
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NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
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return -EINVAL;
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}
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opt_len = tunnel_key_copy_vxlan_opt(attr, dst,
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dst_len, extack);
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if (opt_len < 0)
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return opt_len;
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opts_len += opt_len;
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type = TUNNEL_VXLAN_OPT;
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break;
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case TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN:
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if (type) {
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NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
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return -EINVAL;
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}
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opt_len = tunnel_key_copy_erspan_opt(attr, dst,
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dst_len, extack);
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if (opt_len < 0)
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return opt_len;
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opts_len += opt_len;
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type = TUNNEL_ERSPAN_OPT;
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break;
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}
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}
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if (!opts_len) {
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NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
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return -EINVAL;
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}
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if (rem > 0) {
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NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
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return -EINVAL;
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}
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return opts_len;
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}
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static int tunnel_key_get_opts_len(struct nlattr *nla,
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struct netlink_ext_ack *extack)
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{
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return tunnel_key_copy_opts(nla, NULL, 0, extack);
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}
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static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
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int opts_len, struct netlink_ext_ack *extack)
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{
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info->options_len = opts_len;
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switch (nla_type(nla_data(nla))) {
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case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
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#if IS_ENABLED(CONFIG_INET)
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info->key.tun_flags |= TUNNEL_GENEVE_OPT;
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return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
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opts_len, extack);
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#else
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return -EAFNOSUPPORT;
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#endif
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case TCA_TUNNEL_KEY_ENC_OPTS_VXLAN:
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#if IS_ENABLED(CONFIG_INET)
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info->key.tun_flags |= TUNNEL_VXLAN_OPT;
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return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
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opts_len, extack);
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#else
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return -EAFNOSUPPORT;
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#endif
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case TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN:
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#if IS_ENABLED(CONFIG_INET)
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info->key.tun_flags |= TUNNEL_ERSPAN_OPT;
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return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
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opts_len, extack);
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#else
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return -EAFNOSUPPORT;
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#endif
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default:
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NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
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return -EINVAL;
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}
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}
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static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
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[TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) },
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[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
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[TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
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[TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
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[TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
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[TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
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[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
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[TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 },
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[TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED },
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[TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 },
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[TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 },
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};
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static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
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{
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if (!p)
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return;
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if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
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dst_release(&p->tcft_enc_metadata->dst);
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kfree_rcu(p, rcu);
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}
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static int tunnel_key_init(struct net *net, struct nlattr *nla,
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struct nlattr *est, struct tc_action **a,
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int ovr, int bind, bool rtnl_held,
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struct tcf_proto *tp, u32 act_flags,
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struct netlink_ext_ack *extack)
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{
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struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
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struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
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struct tcf_tunnel_key_params *params_new;
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struct metadata_dst *metadata = NULL;
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struct tcf_chain *goto_ch = NULL;
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struct tc_tunnel_key *parm;
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struct tcf_tunnel_key *t;
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bool exists = false;
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__be16 dst_port = 0;
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__be64 key_id = 0;
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int opts_len = 0;
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__be16 flags = 0;
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u8 tos, ttl;
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int ret = 0;
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u32 index;
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int err;
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if (!nla) {
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NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
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return -EINVAL;
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}
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err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla,
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tunnel_key_policy, extack);
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if (err < 0) {
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NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
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return err;
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}
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if (!tb[TCA_TUNNEL_KEY_PARMS]) {
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NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
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return -EINVAL;
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}
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parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
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index = parm->index;
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err = tcf_idr_check_alloc(tn, &index, a, bind);
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if (err < 0)
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return err;
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exists = err;
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if (exists && bind)
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return 0;
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switch (parm->t_action) {
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case TCA_TUNNEL_KEY_ACT_RELEASE:
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break;
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case TCA_TUNNEL_KEY_ACT_SET:
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if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
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__be32 key32;
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key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
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key_id = key32_to_tunnel_id(key32);
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flags = TUNNEL_KEY;
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}
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flags |= TUNNEL_CSUM;
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if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
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nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
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flags &= ~TUNNEL_CSUM;
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if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
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dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
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if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
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opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
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extack);
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if (opts_len < 0) {
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ret = opts_len;
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goto err_out;
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}
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}
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tos = 0;
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if (tb[TCA_TUNNEL_KEY_ENC_TOS])
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tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
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ttl = 0;
|
|
if (tb[TCA_TUNNEL_KEY_ENC_TTL])
|
|
ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
|
|
|
|
if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
|
|
tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
|
|
__be32 saddr;
|
|
__be32 daddr;
|
|
|
|
saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
|
|
daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
|
|
|
|
metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
|
|
dst_port, flags,
|
|
key_id, opts_len);
|
|
} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
|
|
tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
|
|
struct in6_addr saddr;
|
|
struct in6_addr daddr;
|
|
|
|
saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
|
|
daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
|
|
|
|
metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
|
|
0, flags,
|
|
key_id, 0);
|
|
} else {
|
|
NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
|
|
ret = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
if (!metadata) {
|
|
NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
|
|
ret = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
#ifdef CONFIG_DST_CACHE
|
|
ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
|
|
if (ret)
|
|
goto release_tun_meta;
|
|
#endif
|
|
|
|
if (opts_len) {
|
|
ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
|
|
&metadata->u.tun_info,
|
|
opts_len, extack);
|
|
if (ret < 0)
|
|
goto release_tun_meta;
|
|
}
|
|
|
|
metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
|
|
break;
|
|
default:
|
|
NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
|
|
ret = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
if (!exists) {
|
|
ret = tcf_idr_create_from_flags(tn, index, est, a,
|
|
&act_tunnel_key_ops, bind,
|
|
act_flags);
|
|
if (ret) {
|
|
NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
|
|
goto release_tun_meta;
|
|
}
|
|
|
|
ret = ACT_P_CREATED;
|
|
} else if (!ovr) {
|
|
NL_SET_ERR_MSG(extack, "TC IDR already exists");
|
|
ret = -EEXIST;
|
|
goto release_tun_meta;
|
|
}
|
|
|
|
err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
|
|
if (err < 0) {
|
|
ret = err;
|
|
exists = true;
|
|
goto release_tun_meta;
|
|
}
|
|
t = to_tunnel_key(*a);
|
|
|
|
params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
|
|
if (unlikely(!params_new)) {
|
|
NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
|
|
ret = -ENOMEM;
|
|
exists = true;
|
|
goto put_chain;
|
|
}
|
|
params_new->tcft_action = parm->t_action;
|
|
params_new->tcft_enc_metadata = metadata;
|
|
|
|
spin_lock_bh(&t->tcf_lock);
|
|
goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
|
|
params_new = rcu_replace_pointer(t->params, params_new,
|
|
lockdep_is_held(&t->tcf_lock));
|
|
spin_unlock_bh(&t->tcf_lock);
|
|
tunnel_key_release_params(params_new);
|
|
if (goto_ch)
|
|
tcf_chain_put_by_act(goto_ch);
|
|
|
|
if (ret == ACT_P_CREATED)
|
|
tcf_idr_insert(tn, *a);
|
|
|
|
return ret;
|
|
|
|
put_chain:
|
|
if (goto_ch)
|
|
tcf_chain_put_by_act(goto_ch);
|
|
|
|
release_tun_meta:
|
|
if (metadata)
|
|
dst_release(&metadata->dst);
|
|
|
|
err_out:
|
|
if (exists)
|
|
tcf_idr_release(*a, bind);
|
|
else
|
|
tcf_idr_cleanup(tn, index);
|
|
return ret;
|
|
}
|
|
|
|
static void tunnel_key_release(struct tc_action *a)
|
|
{
|
|
struct tcf_tunnel_key *t = to_tunnel_key(a);
|
|
struct tcf_tunnel_key_params *params;
|
|
|
|
params = rcu_dereference_protected(t->params, 1);
|
|
tunnel_key_release_params(params);
|
|
}
|
|
|
|
static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
|
|
const struct ip_tunnel_info *info)
|
|
{
|
|
int len = info->options_len;
|
|
u8 *src = (u8 *)(info + 1);
|
|
struct nlattr *start;
|
|
|
|
start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
|
|
if (!start)
|
|
return -EMSGSIZE;
|
|
|
|
while (len > 0) {
|
|
struct geneve_opt *opt = (struct geneve_opt *)src;
|
|
|
|
if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
|
|
opt->opt_class) ||
|
|
nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
|
|
opt->type) ||
|
|
nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
|
|
opt->length * 4, opt + 1)) {
|
|
nla_nest_cancel(skb, start);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
len -= sizeof(struct geneve_opt) + opt->length * 4;
|
|
src += sizeof(struct geneve_opt) + opt->length * 4;
|
|
}
|
|
|
|
nla_nest_end(skb, start);
|
|
return 0;
|
|
}
|
|
|
|
static int tunnel_key_vxlan_opts_dump(struct sk_buff *skb,
|
|
const struct ip_tunnel_info *info)
|
|
{
|
|
struct vxlan_metadata *md = (struct vxlan_metadata *)(info + 1);
|
|
struct nlattr *start;
|
|
|
|
start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_VXLAN);
|
|
if (!start)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_u32(skb, TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) {
|
|
nla_nest_cancel(skb, start);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
nla_nest_end(skb, start);
|
|
return 0;
|
|
}
|
|
|
|
static int tunnel_key_erspan_opts_dump(struct sk_buff *skb,
|
|
const struct ip_tunnel_info *info)
|
|
{
|
|
struct erspan_metadata *md = (struct erspan_metadata *)(info + 1);
|
|
struct nlattr *start;
|
|
|
|
start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN);
|
|
if (!start)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER, md->version))
|
|
goto err;
|
|
|
|
if (md->version == 1 &&
|
|
nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
|
|
goto err;
|
|
|
|
if (md->version == 2 &&
|
|
(nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR,
|
|
md->u.md2.dir) ||
|
|
nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID,
|
|
get_hwid(&md->u.md2))))
|
|
goto err;
|
|
|
|
nla_nest_end(skb, start);
|
|
return 0;
|
|
err:
|
|
nla_nest_cancel(skb, start);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int tunnel_key_opts_dump(struct sk_buff *skb,
|
|
const struct ip_tunnel_info *info)
|
|
{
|
|
struct nlattr *start;
|
|
int err = -EINVAL;
|
|
|
|
if (!info->options_len)
|
|
return 0;
|
|
|
|
start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS);
|
|
if (!start)
|
|
return -EMSGSIZE;
|
|
|
|
if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
|
|
err = tunnel_key_geneve_opts_dump(skb, info);
|
|
if (err)
|
|
goto err_out;
|
|
} else if (info->key.tun_flags & TUNNEL_VXLAN_OPT) {
|
|
err = tunnel_key_vxlan_opts_dump(skb, info);
|
|
if (err)
|
|
goto err_out;
|
|
} else if (info->key.tun_flags & TUNNEL_ERSPAN_OPT) {
|
|
err = tunnel_key_erspan_opts_dump(skb, info);
|
|
if (err)
|
|
goto err_out;
|
|
} else {
|
|
err_out:
|
|
nla_nest_cancel(skb, start);
|
|
return err;
|
|
}
|
|
|
|
nla_nest_end(skb, start);
|
|
return 0;
|
|
}
|
|
|
|
static int tunnel_key_dump_addresses(struct sk_buff *skb,
|
|
const struct ip_tunnel_info *info)
|
|
{
|
|
unsigned short family = ip_tunnel_info_af(info);
|
|
|
|
if (family == AF_INET) {
|
|
__be32 saddr = info->key.u.ipv4.src;
|
|
__be32 daddr = info->key.u.ipv4.dst;
|
|
|
|
if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
|
|
!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
|
|
return 0;
|
|
}
|
|
|
|
if (family == AF_INET6) {
|
|
const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
|
|
const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
|
|
|
|
if (!nla_put_in6_addr(skb,
|
|
TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
|
|
!nla_put_in6_addr(skb,
|
|
TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
|
|
int bind, int ref)
|
|
{
|
|
unsigned char *b = skb_tail_pointer(skb);
|
|
struct tcf_tunnel_key *t = to_tunnel_key(a);
|
|
struct tcf_tunnel_key_params *params;
|
|
struct tc_tunnel_key opt = {
|
|
.index = t->tcf_index,
|
|
.refcnt = refcount_read(&t->tcf_refcnt) - ref,
|
|
.bindcnt = atomic_read(&t->tcf_bindcnt) - bind,
|
|
};
|
|
struct tcf_t tm;
|
|
|
|
spin_lock_bh(&t->tcf_lock);
|
|
params = rcu_dereference_protected(t->params,
|
|
lockdep_is_held(&t->tcf_lock));
|
|
opt.action = t->tcf_action;
|
|
opt.t_action = params->tcft_action;
|
|
|
|
if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
|
|
goto nla_put_failure;
|
|
|
|
if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
|
|
struct ip_tunnel_info *info =
|
|
¶ms->tcft_enc_metadata->u.tun_info;
|
|
struct ip_tunnel_key *key = &info->key;
|
|
__be32 key_id = tunnel_id_to_key32(key->tun_id);
|
|
|
|
if (((key->tun_flags & TUNNEL_KEY) &&
|
|
nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
|
|
tunnel_key_dump_addresses(skb,
|
|
¶ms->tcft_enc_metadata->u.tun_info) ||
|
|
(key->tp_dst &&
|
|
nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
|
|
key->tp_dst)) ||
|
|
nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
|
|
!(key->tun_flags & TUNNEL_CSUM)) ||
|
|
tunnel_key_opts_dump(skb, info))
|
|
goto nla_put_failure;
|
|
|
|
if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
|
|
goto nla_put_failure;
|
|
|
|
if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
tcf_tm_dump(&tm, &t->tcf_tm);
|
|
if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
|
|
&tm, TCA_TUNNEL_KEY_PAD))
|
|
goto nla_put_failure;
|
|
spin_unlock_bh(&t->tcf_lock);
|
|
|
|
return skb->len;
|
|
|
|
nla_put_failure:
|
|
spin_unlock_bh(&t->tcf_lock);
|
|
nlmsg_trim(skb, b);
|
|
return -1;
|
|
}
|
|
|
|
static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
|
|
struct netlink_callback *cb, int type,
|
|
const struct tc_action_ops *ops,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
|
|
|
|
return tcf_generic_walker(tn, skb, cb, type, ops, extack);
|
|
}
|
|
|
|
static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
|
|
{
|
|
struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
|
|
|
|
return tcf_idr_search(tn, a, index);
|
|
}
|
|
|
|
static struct tc_action_ops act_tunnel_key_ops = {
|
|
.kind = "tunnel_key",
|
|
.id = TCA_ID_TUNNEL_KEY,
|
|
.owner = THIS_MODULE,
|
|
.act = tunnel_key_act,
|
|
.dump = tunnel_key_dump,
|
|
.init = tunnel_key_init,
|
|
.cleanup = tunnel_key_release,
|
|
.walk = tunnel_key_walker,
|
|
.lookup = tunnel_key_search,
|
|
.size = sizeof(struct tcf_tunnel_key),
|
|
};
|
|
|
|
static __net_init int tunnel_key_init_net(struct net *net)
|
|
{
|
|
struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
|
|
|
|
return tc_action_net_init(net, tn, &act_tunnel_key_ops);
|
|
}
|
|
|
|
static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
|
|
{
|
|
tc_action_net_exit(net_list, tunnel_key_net_id);
|
|
}
|
|
|
|
static struct pernet_operations tunnel_key_net_ops = {
|
|
.init = tunnel_key_init_net,
|
|
.exit_batch = tunnel_key_exit_net,
|
|
.id = &tunnel_key_net_id,
|
|
.size = sizeof(struct tc_action_net),
|
|
};
|
|
|
|
static int __init tunnel_key_init_module(void)
|
|
{
|
|
return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
|
|
}
|
|
|
|
static void __exit tunnel_key_cleanup_module(void)
|
|
{
|
|
tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
|
|
}
|
|
|
|
module_init(tunnel_key_init_module);
|
|
module_exit(tunnel_key_cleanup_module);
|
|
|
|
MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
|
|
MODULE_DESCRIPTION("ip tunnel manipulation actions");
|
|
MODULE_LICENSE("GPL v2");
|