| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) 2016, Amir Vadai <[email protected]> |
| * Copyright (c) 2016, Mellanox Technologies. All rights reserved. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/skbuff.h> |
| #include <linux/rtnetlink.h> |
| #include <net/geneve.h> |
| #include <net/vxlan.h> |
| #include <net/erspan.h> |
| #include <net/netlink.h> |
| #include <net/pkt_sched.h> |
| #include <net/dst.h> |
| #include <net/pkt_cls.h> |
| |
| #include <linux/tc_act/tc_tunnel_key.h> |
| #include <net/tc_act/tc_tunnel_key.h> |
| |
| static unsigned int tunnel_key_net_id; |
| static struct tc_action_ops act_tunnel_key_ops; |
| |
| static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a, |
| struct tcf_result *res) |
| { |
| struct tcf_tunnel_key *t = to_tunnel_key(a); |
| struct tcf_tunnel_key_params *params; |
| int action; |
| |
| params = rcu_dereference_bh(t->params); |
| |
| tcf_lastuse_update(&t->tcf_tm); |
| tcf_action_update_bstats(&t->common, skb); |
| action = READ_ONCE(t->tcf_action); |
| |
| switch (params->tcft_action) { |
| case TCA_TUNNEL_KEY_ACT_RELEASE: |
| skb_dst_drop(skb); |
| break; |
| case TCA_TUNNEL_KEY_ACT_SET: |
| skb_dst_drop(skb); |
| skb_dst_set(skb, dst_clone(¶ms->tcft_enc_metadata->dst)); |
| break; |
| default: |
| WARN_ONCE(1, "Bad tunnel_key action %d.\n", |
| params->tcft_action); |
| break; |
| } |
| |
| return action; |
| } |
| |
| static const struct nla_policy |
| enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = { |
| [TCA_TUNNEL_KEY_ENC_OPTS_UNSPEC] = { |
| .strict_start_type = TCA_TUNNEL_KEY_ENC_OPTS_VXLAN }, |
| [TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, |
| [TCA_TUNNEL_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, |
| [TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, |
| }; |
| |
| static const struct nla_policy |
| geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = { |
| [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, |
| [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, |
| [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, |
| .len = 128 }, |
| }; |
| |
| static const struct nla_policy |
| vxlan_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX + 1] = { |
| [TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, |
| }; |
| |
| static const struct nla_policy |
| erspan_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX + 1] = { |
| [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, |
| [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, |
| [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, |
| [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, |
| }; |
| |
| static int |
| tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1]; |
| int err, data_len, opt_len; |
| u8 *data; |
| |
| err = nla_parse_nested_deprecated(tb, |
| TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX, |
| nla, geneve_opt_policy, extack); |
| if (err < 0) |
| return err; |
| |
| if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] || |
| !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] || |
| !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); |
| return -EINVAL; |
| } |
| |
| data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]); |
| data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]); |
| if (data_len < 4) { |
| NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); |
| return -ERANGE; |
| } |
| if (data_len % 4) { |
| NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); |
| return -ERANGE; |
| } |
| |
| opt_len = sizeof(struct geneve_opt) + data_len; |
| if (dst) { |
| struct geneve_opt *opt = dst; |
| |
| WARN_ON(dst_len < opt_len); |
| |
| opt->opt_class = |
| nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]); |
| opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]); |
| opt->length = data_len / 4; /* length is in units of 4 bytes */ |
| opt->r1 = 0; |
| opt->r2 = 0; |
| opt->r3 = 0; |
| |
| memcpy(opt + 1, data, data_len); |
| } |
| |
| return opt_len; |
| } |
| |
| static int |
| tunnel_key_copy_vxlan_opt(const struct nlattr *nla, void *dst, int dst_len, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX + 1]; |
| int err; |
| |
| err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX, nla, |
| vxlan_opt_policy, extack); |
| if (err < 0) |
| return err; |
| |
| if (!tb[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP]) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); |
| return -EINVAL; |
| } |
| |
| if (dst) { |
| struct vxlan_metadata *md = dst; |
| |
| md->gbp = nla_get_u32(tb[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP]); |
| } |
| |
| return sizeof(struct vxlan_metadata); |
| } |
| |
| static int |
| tunnel_key_copy_erspan_opt(const struct nlattr *nla, void *dst, int dst_len, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX + 1]; |
| int err; |
| u8 ver; |
| |
| err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX, nla, |
| erspan_opt_policy, extack); |
| if (err < 0) |
| return err; |
| |
| if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER]) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); |
| return -EINVAL; |
| } |
| |
| ver = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER]); |
| if (ver == 1) { |
| if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX]) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); |
| return -EINVAL; |
| } |
| } else if (ver == 2) { |
| if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR] || |
| !tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID]) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); |
| return -EINVAL; |
| } |
| } else { |
| NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); |
| return -EINVAL; |
| } |
| |
| if (dst) { |
| struct erspan_metadata *md = dst; |
| |
| md->version = ver; |
| if (ver == 1) { |
| nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX]; |
| md->u.index = nla_get_be32(nla); |
| } else { |
| nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR]; |
| md->u.md2.dir = nla_get_u8(nla); |
| nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID]; |
| set_hwid(&md->u.md2, nla_get_u8(nla)); |
| } |
| } |
| |
| return sizeof(struct erspan_metadata); |
| } |
| |
| static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst, |
| int dst_len, struct netlink_ext_ack *extack) |
| { |
| int err, rem, opt_len, len = nla_len(nla), opts_len = 0, type = 0; |
| const struct nlattr *attr, *head = nla_data(nla); |
| |
| err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX, |
| enc_opts_policy, extack); |
| if (err) |
| return err; |
| |
| nla_for_each_attr(attr, head, len, rem) { |
| switch (nla_type(attr)) { |
| case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE: |
| if (type && type != TUNNEL_GENEVE_OPT) { |
| NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); |
| return -EINVAL; |
| } |
| opt_len = tunnel_key_copy_geneve_opt(attr, dst, |
| dst_len, extack); |
| if (opt_len < 0) |
| return opt_len; |
| opts_len += opt_len; |
| if (opts_len > IP_TUNNEL_OPTS_MAX) { |
| NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); |
| return -EINVAL; |
| } |
| if (dst) { |
| dst_len -= opt_len; |
| dst += opt_len; |
| } |
| type = TUNNEL_GENEVE_OPT; |
| break; |
| case TCA_TUNNEL_KEY_ENC_OPTS_VXLAN: |
| if (type) { |
| NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); |
| return -EINVAL; |
| } |
| opt_len = tunnel_key_copy_vxlan_opt(attr, dst, |
| dst_len, extack); |
| if (opt_len < 0) |
| return opt_len; |
| opts_len += opt_len; |
| type = TUNNEL_VXLAN_OPT; |
| break; |
| case TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN: |
| if (type) { |
| NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); |
| return -EINVAL; |
| } |
| opt_len = tunnel_key_copy_erspan_opt(attr, dst, |
| dst_len, extack); |
| if (opt_len < 0) |
| return opt_len; |
| opts_len += opt_len; |
| type = TUNNEL_ERSPAN_OPT; |
| break; |
| } |
| } |
| |
| if (!opts_len) { |
| NL_SET_ERR_MSG(extack, "Empty list of tunnel options"); |
| return -EINVAL; |
| } |
| |
| if (rem > 0) { |
| NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes"); |
| return -EINVAL; |
| } |
| |
| return opts_len; |
| } |
| |
| static int tunnel_key_get_opts_len(struct nlattr *nla, |
| struct netlink_ext_ack *extack) |
| { |
| return tunnel_key_copy_opts(nla, NULL, 0, extack); |
| } |
| |
| static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info, |
| int opts_len, struct netlink_ext_ack *extack) |
| { |
| info->options_len = opts_len; |
| switch (nla_type(nla_data(nla))) { |
| case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE: |
| #if IS_ENABLED(CONFIG_INET) |
| info->key.tun_flags |= TUNNEL_GENEVE_OPT; |
| return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info), |
| opts_len, extack); |
| #else |
| return -EAFNOSUPPORT; |
| #endif |
| case TCA_TUNNEL_KEY_ENC_OPTS_VXLAN: |
| #if IS_ENABLED(CONFIG_INET) |
| info->key.tun_flags |= TUNNEL_VXLAN_OPT; |
| return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info), |
| opts_len, extack); |
| #else |
| return -EAFNOSUPPORT; |
| #endif |
| case TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN: |
| #if IS_ENABLED(CONFIG_INET) |
| info->key.tun_flags |= TUNNEL_ERSPAN_OPT; |
| return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info), |
| opts_len, extack); |
| #else |
| return -EAFNOSUPPORT; |
| #endif |
| default: |
| NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type"); |
| return -EINVAL; |
| } |
| } |
| |
| static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = { |
| [TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) }, |
| [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, |
| [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, |
| [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, |
| [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, |
| [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, |
| [TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16}, |
| [TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 }, |
| [TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED }, |
| [TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 }, |
| [TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 }, |
| }; |
| |
| static void tunnel_key_release_params(struct tcf_tunnel_key_params *p) |
| { |
| if (!p) |
| return; |
| if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET) |
| dst_release(&p->tcft_enc_metadata->dst); |
| |
| kfree_rcu(p, rcu); |
| } |
| |
| static int tunnel_key_init(struct net *net, struct nlattr *nla, |
| struct nlattr *est, struct tc_action **a, |
| int ovr, int bind, bool rtnl_held, |
| struct tcf_proto *tp, u32 act_flags, |
| struct netlink_ext_ack *extack) |
| { |
| struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); |
| struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1]; |
| struct tcf_tunnel_key_params *params_new; |
| struct metadata_dst *metadata = NULL; |
| struct tcf_chain *goto_ch = NULL; |
| struct tc_tunnel_key *parm; |
| struct tcf_tunnel_key *t; |
| bool exists = false; |
| __be16 dst_port = 0; |
| __be64 key_id = 0; |
| int opts_len = 0; |
| __be16 flags = 0; |
| u8 tos, ttl; |
| int ret = 0; |
| u32 index; |
| int err; |
| |
| if (!nla) { |
| NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed"); |
| return -EINVAL; |
| } |
| |
| err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla, |
| tunnel_key_policy, extack); |
| if (err < 0) { |
| NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes"); |
| return err; |
| } |
| |
| if (!tb[TCA_TUNNEL_KEY_PARMS]) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key parameters"); |
| return -EINVAL; |
| } |
| |
| parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]); |
| index = parm->index; |
| err = tcf_idr_check_alloc(tn, &index, a, bind); |
| if (err < 0) |
| return err; |
| exists = err; |
| if (exists && bind) |
| return 0; |
| |
| switch (parm->t_action) { |
| case TCA_TUNNEL_KEY_ACT_RELEASE: |
| break; |
| case TCA_TUNNEL_KEY_ACT_SET: |
| if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) { |
| __be32 key32; |
| |
| key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]); |
| key_id = key32_to_tunnel_id(key32); |
| flags = TUNNEL_KEY; |
| } |
| |
| flags |= TUNNEL_CSUM; |
| if (tb[TCA_TUNNEL_KEY_NO_CSUM] && |
| nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM])) |
| flags &= ~TUNNEL_CSUM; |
| |
| if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT]) |
| dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]); |
| |
| if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) { |
| opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS], |
| extack); |
| if (opts_len < 0) { |
| ret = opts_len; |
| goto err_out; |
| } |
| } |
| |
| tos = 0; |
| if (tb[TCA_TUNNEL_KEY_ENC_TOS]) |
| tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]); |
| 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 <[email protected]>"); |
| MODULE_DESCRIPTION("ip tunnel manipulation actions"); |
| MODULE_LICENSE("GPL v2"); |
