| /* SPDX-License-Identifier: GPL-2.0 */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/seqlock.h> |
| #include <linux/netlink.h> |
| #include <linux/netfilter.h> |
| #include <linux/netfilter/nf_tables.h> |
| #include <net/netfilter/nf_tables.h> |
| #include <net/dst_metadata.h> |
| #include <net/ip_tunnels.h> |
| #include <net/vxlan.h> |
| #include <net/erspan.h> |
| #include <net/geneve.h> |
| |
| struct nft_tunnel { |
| enum nft_tunnel_keys key:8; |
| u8 dreg; |
| enum nft_tunnel_mode mode:8; |
| u8 len; |
| }; |
| |
| static void nft_tunnel_get_eval(const struct nft_expr *expr, |
| struct nft_regs *regs, |
| const struct nft_pktinfo *pkt) |
| { |
| const struct nft_tunnel *priv = nft_expr_priv(expr); |
| u32 *dest = ®s->data[priv->dreg]; |
| struct ip_tunnel_info *tun_info; |
| |
| tun_info = skb_tunnel_info(pkt->skb); |
| |
| switch (priv->key) { |
| case NFT_TUNNEL_PATH: |
| if (!tun_info) { |
| nft_reg_store8(dest, false); |
| return; |
| } |
| if (priv->mode == NFT_TUNNEL_MODE_NONE || |
| (priv->mode == NFT_TUNNEL_MODE_RX && |
| !(tun_info->mode & IP_TUNNEL_INFO_TX)) || |
| (priv->mode == NFT_TUNNEL_MODE_TX && |
| (tun_info->mode & IP_TUNNEL_INFO_TX))) |
| nft_reg_store8(dest, true); |
| else |
| nft_reg_store8(dest, false); |
| break; |
| case NFT_TUNNEL_ID: |
| if (!tun_info) { |
| regs->verdict.code = NFT_BREAK; |
| return; |
| } |
| if (priv->mode == NFT_TUNNEL_MODE_NONE || |
| (priv->mode == NFT_TUNNEL_MODE_RX && |
| !(tun_info->mode & IP_TUNNEL_INFO_TX)) || |
| (priv->mode == NFT_TUNNEL_MODE_TX && |
| (tun_info->mode & IP_TUNNEL_INFO_TX))) |
| *dest = ntohl(tunnel_id_to_key32(tun_info->key.tun_id)); |
| else |
| regs->verdict.code = NFT_BREAK; |
| break; |
| default: |
| WARN_ON(1); |
| regs->verdict.code = NFT_BREAK; |
| } |
| } |
| |
| static const struct nla_policy nft_tunnel_policy[NFTA_TUNNEL_MAX + 1] = { |
| [NFTA_TUNNEL_KEY] = { .type = NLA_U32 }, |
| [NFTA_TUNNEL_DREG] = { .type = NLA_U32 }, |
| [NFTA_TUNNEL_MODE] = { .type = NLA_U32 }, |
| }; |
| |
| static int nft_tunnel_get_init(const struct nft_ctx *ctx, |
| const struct nft_expr *expr, |
| const struct nlattr * const tb[]) |
| { |
| struct nft_tunnel *priv = nft_expr_priv(expr); |
| u32 len; |
| |
| if (!tb[NFTA_TUNNEL_KEY] || |
| !tb[NFTA_TUNNEL_DREG]) |
| return -EINVAL; |
| |
| priv->key = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY])); |
| switch (priv->key) { |
| case NFT_TUNNEL_PATH: |
| len = sizeof(u8); |
| break; |
| case NFT_TUNNEL_ID: |
| len = sizeof(u32); |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| if (tb[NFTA_TUNNEL_MODE]) { |
| priv->mode = ntohl(nla_get_be32(tb[NFTA_TUNNEL_MODE])); |
| if (priv->mode > NFT_TUNNEL_MODE_MAX) |
| return -EOPNOTSUPP; |
| } else { |
| priv->mode = NFT_TUNNEL_MODE_NONE; |
| } |
| |
| priv->len = len; |
| return nft_parse_register_store(ctx, tb[NFTA_TUNNEL_DREG], &priv->dreg, |
| NULL, NFT_DATA_VALUE, len); |
| } |
| |
| static int nft_tunnel_get_dump(struct sk_buff *skb, |
| const struct nft_expr *expr, bool reset) |
| { |
| const struct nft_tunnel *priv = nft_expr_priv(expr); |
| |
| if (nla_put_be32(skb, NFTA_TUNNEL_KEY, htonl(priv->key))) |
| goto nla_put_failure; |
| if (nft_dump_register(skb, NFTA_TUNNEL_DREG, priv->dreg)) |
| goto nla_put_failure; |
| if (nla_put_be32(skb, NFTA_TUNNEL_MODE, htonl(priv->mode))) |
| goto nla_put_failure; |
| return 0; |
| |
| nla_put_failure: |
| return -1; |
| } |
| |
| static bool nft_tunnel_get_reduce(struct nft_regs_track *track, |
| const struct nft_expr *expr) |
| { |
| const struct nft_tunnel *priv = nft_expr_priv(expr); |
| const struct nft_tunnel *tunnel; |
| |
| if (!nft_reg_track_cmp(track, expr, priv->dreg)) { |
| nft_reg_track_update(track, expr, priv->dreg, priv->len); |
| return false; |
| } |
| |
| tunnel = nft_expr_priv(track->regs[priv->dreg].selector); |
| if (priv->key != tunnel->key || |
| priv->dreg != tunnel->dreg || |
| priv->mode != tunnel->mode) { |
| nft_reg_track_update(track, expr, priv->dreg, priv->len); |
| return false; |
| } |
| |
| if (!track->regs[priv->dreg].bitwise) |
| return true; |
| |
| return false; |
| } |
| |
| static struct nft_expr_type nft_tunnel_type; |
| static const struct nft_expr_ops nft_tunnel_get_ops = { |
| .type = &nft_tunnel_type, |
| .size = NFT_EXPR_SIZE(sizeof(struct nft_tunnel)), |
| .eval = nft_tunnel_get_eval, |
| .init = nft_tunnel_get_init, |
| .dump = nft_tunnel_get_dump, |
| .reduce = nft_tunnel_get_reduce, |
| }; |
| |
| static struct nft_expr_type nft_tunnel_type __read_mostly = { |
| .name = "tunnel", |
| .family = NFPROTO_NETDEV, |
| .ops = &nft_tunnel_get_ops, |
| .policy = nft_tunnel_policy, |
| .maxattr = NFTA_TUNNEL_MAX, |
| .owner = THIS_MODULE, |
| }; |
| |
| struct nft_tunnel_opts { |
| union { |
| struct vxlan_metadata vxlan; |
| struct erspan_metadata erspan; |
| u8 data[IP_TUNNEL_OPTS_MAX]; |
| } u; |
| u32 len; |
| __be16 flags; |
| }; |
| |
| struct nft_tunnel_obj { |
| struct metadata_dst *md; |
| struct nft_tunnel_opts opts; |
| }; |
| |
| static const struct nla_policy nft_tunnel_ip_policy[NFTA_TUNNEL_KEY_IP_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_IP_SRC] = { .type = NLA_U32 }, |
| [NFTA_TUNNEL_KEY_IP_DST] = { .type = NLA_U32 }, |
| }; |
| |
| static int nft_tunnel_obj_ip_init(const struct nft_ctx *ctx, |
| const struct nlattr *attr, |
| struct ip_tunnel_info *info) |
| { |
| struct nlattr *tb[NFTA_TUNNEL_KEY_IP_MAX + 1]; |
| int err; |
| |
| err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_IP_MAX, attr, |
| nft_tunnel_ip_policy, NULL); |
| if (err < 0) |
| return err; |
| |
| if (!tb[NFTA_TUNNEL_KEY_IP_DST]) |
| return -EINVAL; |
| |
| if (tb[NFTA_TUNNEL_KEY_IP_SRC]) |
| info->key.u.ipv4.src = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_SRC]); |
| if (tb[NFTA_TUNNEL_KEY_IP_DST]) |
| info->key.u.ipv4.dst = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_DST]); |
| |
| return 0; |
| } |
| |
| static const struct nla_policy nft_tunnel_ip6_policy[NFTA_TUNNEL_KEY_IP6_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_IP6_SRC] = { .len = sizeof(struct in6_addr), }, |
| [NFTA_TUNNEL_KEY_IP6_DST] = { .len = sizeof(struct in6_addr), }, |
| [NFTA_TUNNEL_KEY_IP6_FLOWLABEL] = { .type = NLA_U32, } |
| }; |
| |
| static int nft_tunnel_obj_ip6_init(const struct nft_ctx *ctx, |
| const struct nlattr *attr, |
| struct ip_tunnel_info *info) |
| { |
| struct nlattr *tb[NFTA_TUNNEL_KEY_IP6_MAX + 1]; |
| int err; |
| |
| err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_IP6_MAX, attr, |
| nft_tunnel_ip6_policy, NULL); |
| if (err < 0) |
| return err; |
| |
| if (!tb[NFTA_TUNNEL_KEY_IP6_DST]) |
| return -EINVAL; |
| |
| if (tb[NFTA_TUNNEL_KEY_IP6_SRC]) { |
| memcpy(&info->key.u.ipv6.src, |
| nla_data(tb[NFTA_TUNNEL_KEY_IP6_SRC]), |
| sizeof(struct in6_addr)); |
| } |
| if (tb[NFTA_TUNNEL_KEY_IP6_DST]) { |
| memcpy(&info->key.u.ipv6.dst, |
| nla_data(tb[NFTA_TUNNEL_KEY_IP6_DST]), |
| sizeof(struct in6_addr)); |
| } |
| if (tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL]) |
| info->key.label = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL]); |
| |
| info->mode |= IP_TUNNEL_INFO_IPV6; |
| |
| return 0; |
| } |
| |
| static const struct nla_policy nft_tunnel_opts_vxlan_policy[NFTA_TUNNEL_KEY_VXLAN_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_VXLAN_GBP] = { .type = NLA_U32 }, |
| }; |
| |
| static int nft_tunnel_obj_vxlan_init(const struct nlattr *attr, |
| struct nft_tunnel_opts *opts) |
| { |
| struct nlattr *tb[NFTA_TUNNEL_KEY_VXLAN_MAX + 1]; |
| int err; |
| |
| err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_VXLAN_MAX, attr, |
| nft_tunnel_opts_vxlan_policy, NULL); |
| if (err < 0) |
| return err; |
| |
| if (!tb[NFTA_TUNNEL_KEY_VXLAN_GBP]) |
| return -EINVAL; |
| |
| opts->u.vxlan.gbp = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_VXLAN_GBP])); |
| |
| opts->len = sizeof(struct vxlan_metadata); |
| opts->flags = TUNNEL_VXLAN_OPT; |
| |
| return 0; |
| } |
| |
| static const struct nla_policy nft_tunnel_opts_erspan_policy[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_ERSPAN_VERSION] = { .type = NLA_U32 }, |
| [NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX] = { .type = NLA_U32 }, |
| [NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] = { .type = NLA_U8 }, |
| [NFTA_TUNNEL_KEY_ERSPAN_V2_HWID] = { .type = NLA_U8 }, |
| }; |
| |
| static int nft_tunnel_obj_erspan_init(const struct nlattr *attr, |
| struct nft_tunnel_opts *opts) |
| { |
| struct nlattr *tb[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1]; |
| uint8_t hwid, dir; |
| int err, version; |
| |
| err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_ERSPAN_MAX, |
| attr, nft_tunnel_opts_erspan_policy, |
| NULL); |
| if (err < 0) |
| return err; |
| |
| if (!tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]) |
| return -EINVAL; |
| |
| version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION])); |
| switch (version) { |
| case ERSPAN_VERSION: |
| if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX]) |
| return -EINVAL; |
| |
| opts->u.erspan.u.index = |
| nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX]); |
| break; |
| case ERSPAN_VERSION2: |
| if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] || |
| !tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID]) |
| return -EINVAL; |
| |
| hwid = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID]); |
| dir = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR]); |
| |
| set_hwid(&opts->u.erspan.u.md2, hwid); |
| opts->u.erspan.u.md2.dir = dir; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| opts->u.erspan.version = version; |
| |
| opts->len = sizeof(struct erspan_metadata); |
| opts->flags = TUNNEL_ERSPAN_OPT; |
| |
| return 0; |
| } |
| |
| static const struct nla_policy nft_tunnel_opts_geneve_policy[NFTA_TUNNEL_KEY_GENEVE_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_GENEVE_CLASS] = { .type = NLA_U16 }, |
| [NFTA_TUNNEL_KEY_GENEVE_TYPE] = { .type = NLA_U8 }, |
| [NFTA_TUNNEL_KEY_GENEVE_DATA] = { .type = NLA_BINARY, .len = 128 }, |
| }; |
| |
| static int nft_tunnel_obj_geneve_init(const struct nlattr *attr, |
| struct nft_tunnel_opts *opts) |
| { |
| struct geneve_opt *opt = (struct geneve_opt *)opts->u.data + opts->len; |
| struct nlattr *tb[NFTA_TUNNEL_KEY_GENEVE_MAX + 1]; |
| int err, data_len; |
| |
| err = nla_parse_nested(tb, NFTA_TUNNEL_KEY_GENEVE_MAX, attr, |
| nft_tunnel_opts_geneve_policy, NULL); |
| if (err < 0) |
| return err; |
| |
| if (!tb[NFTA_TUNNEL_KEY_GENEVE_CLASS] || |
| !tb[NFTA_TUNNEL_KEY_GENEVE_TYPE] || |
| !tb[NFTA_TUNNEL_KEY_GENEVE_DATA]) |
| return -EINVAL; |
| |
| attr = tb[NFTA_TUNNEL_KEY_GENEVE_DATA]; |
| data_len = nla_len(attr); |
| if (data_len % 4) |
| return -EINVAL; |
| |
| opts->len += sizeof(*opt) + data_len; |
| if (opts->len > IP_TUNNEL_OPTS_MAX) |
| return -EINVAL; |
| |
| memcpy(opt->opt_data, nla_data(attr), data_len); |
| opt->length = data_len / 4; |
| opt->opt_class = nla_get_be16(tb[NFTA_TUNNEL_KEY_GENEVE_CLASS]); |
| opt->type = nla_get_u8(tb[NFTA_TUNNEL_KEY_GENEVE_TYPE]); |
| opts->flags = TUNNEL_GENEVE_OPT; |
| |
| return 0; |
| } |
| |
| static const struct nla_policy nft_tunnel_opts_policy[NFTA_TUNNEL_KEY_OPTS_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_OPTS_UNSPEC] = { |
| .strict_start_type = NFTA_TUNNEL_KEY_OPTS_GENEVE }, |
| [NFTA_TUNNEL_KEY_OPTS_VXLAN] = { .type = NLA_NESTED, }, |
| [NFTA_TUNNEL_KEY_OPTS_ERSPAN] = { .type = NLA_NESTED, }, |
| [NFTA_TUNNEL_KEY_OPTS_GENEVE] = { .type = NLA_NESTED, }, |
| }; |
| |
| static int nft_tunnel_obj_opts_init(const struct nft_ctx *ctx, |
| const struct nlattr *attr, |
| struct ip_tunnel_info *info, |
| struct nft_tunnel_opts *opts) |
| { |
| struct nlattr *nla; |
| __be16 type = 0; |
| int err, rem; |
| |
| err = nla_validate_nested_deprecated(attr, NFTA_TUNNEL_KEY_OPTS_MAX, |
| nft_tunnel_opts_policy, NULL); |
| if (err < 0) |
| return err; |
| |
| nla_for_each_attr(nla, nla_data(attr), nla_len(attr), rem) { |
| switch (nla_type(nla)) { |
| case NFTA_TUNNEL_KEY_OPTS_VXLAN: |
| if (type) |
| return -EINVAL; |
| err = nft_tunnel_obj_vxlan_init(nla, opts); |
| if (err) |
| return err; |
| type = TUNNEL_VXLAN_OPT; |
| break; |
| case NFTA_TUNNEL_KEY_OPTS_ERSPAN: |
| if (type) |
| return -EINVAL; |
| err = nft_tunnel_obj_erspan_init(nla, opts); |
| if (err) |
| return err; |
| type = TUNNEL_ERSPAN_OPT; |
| break; |
| case NFTA_TUNNEL_KEY_OPTS_GENEVE: |
| if (type && type != TUNNEL_GENEVE_OPT) |
| return -EINVAL; |
| err = nft_tunnel_obj_geneve_init(nla, opts); |
| if (err) |
| return err; |
| type = TUNNEL_GENEVE_OPT; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| return err; |
| } |
| |
| static const struct nla_policy nft_tunnel_key_policy[NFTA_TUNNEL_KEY_MAX + 1] = { |
| [NFTA_TUNNEL_KEY_IP] = { .type = NLA_NESTED, }, |
| [NFTA_TUNNEL_KEY_IP6] = { .type = NLA_NESTED, }, |
| [NFTA_TUNNEL_KEY_ID] = { .type = NLA_U32, }, |
| [NFTA_TUNNEL_KEY_FLAGS] = { .type = NLA_U32, }, |
| [NFTA_TUNNEL_KEY_TOS] = { .type = NLA_U8, }, |
| [NFTA_TUNNEL_KEY_TTL] = { .type = NLA_U8, }, |
| [NFTA_TUNNEL_KEY_SPORT] = { .type = NLA_U16, }, |
| [NFTA_TUNNEL_KEY_DPORT] = { .type = NLA_U16, }, |
| [NFTA_TUNNEL_KEY_OPTS] = { .type = NLA_NESTED, }, |
| }; |
| |
| static int nft_tunnel_obj_init(const struct nft_ctx *ctx, |
| const struct nlattr * const tb[], |
| struct nft_object *obj) |
| { |
| struct nft_tunnel_obj *priv = nft_obj_data(obj); |
| struct ip_tunnel_info info; |
| struct metadata_dst *md; |
| int err; |
| |
| if (!tb[NFTA_TUNNEL_KEY_ID]) |
| return -EINVAL; |
| |
| memset(&info, 0, sizeof(info)); |
| info.mode = IP_TUNNEL_INFO_TX; |
| info.key.tun_id = key32_to_tunnel_id(nla_get_be32(tb[NFTA_TUNNEL_KEY_ID])); |
| info.key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM | TUNNEL_NOCACHE; |
| |
| if (tb[NFTA_TUNNEL_KEY_IP]) { |
| err = nft_tunnel_obj_ip_init(ctx, tb[NFTA_TUNNEL_KEY_IP], &info); |
| if (err < 0) |
| return err; |
| } else if (tb[NFTA_TUNNEL_KEY_IP6]) { |
| err = nft_tunnel_obj_ip6_init(ctx, tb[NFTA_TUNNEL_KEY_IP6], &info); |
| if (err < 0) |
| return err; |
| } else { |
| return -EINVAL; |
| } |
| |
| if (tb[NFTA_TUNNEL_KEY_SPORT]) { |
| info.key.tp_src = nla_get_be16(tb[NFTA_TUNNEL_KEY_SPORT]); |
| } |
| if (tb[NFTA_TUNNEL_KEY_DPORT]) { |
| info.key.tp_dst = nla_get_be16(tb[NFTA_TUNNEL_KEY_DPORT]); |
| } |
| |
| if (tb[NFTA_TUNNEL_KEY_FLAGS]) { |
| u32 tun_flags; |
| |
| tun_flags = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_FLAGS])); |
| if (tun_flags & ~NFT_TUNNEL_F_MASK) |
| return -EOPNOTSUPP; |
| |
| if (tun_flags & NFT_TUNNEL_F_ZERO_CSUM_TX) |
| info.key.tun_flags &= ~TUNNEL_CSUM; |
| if (tun_flags & NFT_TUNNEL_F_DONT_FRAGMENT) |
| info.key.tun_flags |= TUNNEL_DONT_FRAGMENT; |
| if (tun_flags & NFT_TUNNEL_F_SEQ_NUMBER) |
| info.key.tun_flags |= TUNNEL_SEQ; |
| } |
| if (tb[NFTA_TUNNEL_KEY_TOS]) |
| info.key.tos = nla_get_u8(tb[NFTA_TUNNEL_KEY_TOS]); |
| if (tb[NFTA_TUNNEL_KEY_TTL]) |
| info.key.ttl = nla_get_u8(tb[NFTA_TUNNEL_KEY_TTL]); |
| else |
| info.key.ttl = U8_MAX; |
| |
| if (tb[NFTA_TUNNEL_KEY_OPTS]) { |
| err = nft_tunnel_obj_opts_init(ctx, tb[NFTA_TUNNEL_KEY_OPTS], |
| &info, &priv->opts); |
| if (err < 0) |
| return err; |
| } |
| |
| md = metadata_dst_alloc(priv->opts.len, METADATA_IP_TUNNEL, GFP_KERNEL); |
| if (!md) |
| return -ENOMEM; |
| |
| memcpy(&md->u.tun_info, &info, sizeof(info)); |
| #ifdef CONFIG_DST_CACHE |
| err = dst_cache_init(&md->u.tun_info.dst_cache, GFP_KERNEL); |
| if (err < 0) { |
| metadata_dst_free(md); |
| return err; |
| } |
| #endif |
| ip_tunnel_info_opts_set(&md->u.tun_info, &priv->opts.u, priv->opts.len, |
| priv->opts.flags); |
| priv->md = md; |
| |
| return 0; |
| } |
| |
| static inline void nft_tunnel_obj_eval(struct nft_object *obj, |
| struct nft_regs *regs, |
| const struct nft_pktinfo *pkt) |
| { |
| struct nft_tunnel_obj *priv = nft_obj_data(obj); |
| struct sk_buff *skb = pkt->skb; |
| |
| skb_dst_drop(skb); |
| dst_hold((struct dst_entry *) priv->md); |
| skb_dst_set(skb, (struct dst_entry *) priv->md); |
| } |
| |
| static int nft_tunnel_ip_dump(struct sk_buff *skb, struct ip_tunnel_info *info) |
| { |
| struct nlattr *nest; |
| |
| if (info->mode & IP_TUNNEL_INFO_IPV6) { |
| nest = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_IP6); |
| if (!nest) |
| return -1; |
| |
| if (nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_SRC, |
| &info->key.u.ipv6.src) < 0 || |
| nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_DST, |
| &info->key.u.ipv6.dst) < 0 || |
| nla_put_be32(skb, NFTA_TUNNEL_KEY_IP6_FLOWLABEL, |
| info->key.label)) { |
| nla_nest_cancel(skb, nest); |
| return -1; |
| } |
| |
| nla_nest_end(skb, nest); |
| } else { |
| nest = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_IP); |
| if (!nest) |
| return -1; |
| |
| if (nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_SRC, |
| info->key.u.ipv4.src) < 0 || |
| nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_DST, |
| info->key.u.ipv4.dst) < 0) { |
| nla_nest_cancel(skb, nest); |
| return -1; |
| } |
| |
| nla_nest_end(skb, nest); |
| } |
| |
| return 0; |
| } |
| |
| static int nft_tunnel_opts_dump(struct sk_buff *skb, |
| struct nft_tunnel_obj *priv) |
| { |
| struct nft_tunnel_opts *opts = &priv->opts; |
| struct nlattr *nest, *inner; |
| |
| nest = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_OPTS); |
| if (!nest) |
| return -1; |
| |
| if (opts->flags & TUNNEL_VXLAN_OPT) { |
| inner = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_OPTS_VXLAN); |
| if (!inner) |
| goto failure; |
| if (nla_put_be32(skb, NFTA_TUNNEL_KEY_VXLAN_GBP, |
| htonl(opts->u.vxlan.gbp))) |
| goto inner_failure; |
| nla_nest_end(skb, inner); |
| } else if (opts->flags & TUNNEL_ERSPAN_OPT) { |
| inner = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_OPTS_ERSPAN); |
| if (!inner) |
| goto failure; |
| if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ERSPAN_VERSION, |
| htonl(opts->u.erspan.version))) |
| goto inner_failure; |
| switch (opts->u.erspan.version) { |
| case ERSPAN_VERSION: |
| if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX, |
| opts->u.erspan.u.index)) |
| goto inner_failure; |
| break; |
| case ERSPAN_VERSION2: |
| if (nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_HWID, |
| get_hwid(&opts->u.erspan.u.md2)) || |
| nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_DIR, |
| opts->u.erspan.u.md2.dir)) |
| goto inner_failure; |
| break; |
| } |
| nla_nest_end(skb, inner); |
| } else if (opts->flags & TUNNEL_GENEVE_OPT) { |
| struct geneve_opt *opt; |
| int offset = 0; |
| |
| inner = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_OPTS_GENEVE); |
| if (!inner) |
| goto failure; |
| while (opts->len > offset) { |
| opt = (struct geneve_opt *)opts->u.data + offset; |
| if (nla_put_be16(skb, NFTA_TUNNEL_KEY_GENEVE_CLASS, |
| opt->opt_class) || |
| nla_put_u8(skb, NFTA_TUNNEL_KEY_GENEVE_TYPE, |
| opt->type) || |
| nla_put(skb, NFTA_TUNNEL_KEY_GENEVE_DATA, |
| opt->length * 4, opt->opt_data)) |
| goto inner_failure; |
| offset += sizeof(*opt) + opt->length * 4; |
| } |
| nla_nest_end(skb, inner); |
| } |
| nla_nest_end(skb, nest); |
| return 0; |
| |
| inner_failure: |
| nla_nest_cancel(skb, inner); |
| failure: |
| nla_nest_cancel(skb, nest); |
| return -1; |
| } |
| |
| static int nft_tunnel_ports_dump(struct sk_buff *skb, |
| struct ip_tunnel_info *info) |
| { |
| if (nla_put_be16(skb, NFTA_TUNNEL_KEY_SPORT, info->key.tp_src) < 0 || |
| nla_put_be16(skb, NFTA_TUNNEL_KEY_DPORT, info->key.tp_dst) < 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int nft_tunnel_flags_dump(struct sk_buff *skb, |
| struct ip_tunnel_info *info) |
| { |
| u32 flags = 0; |
| |
| if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) |
| flags |= NFT_TUNNEL_F_DONT_FRAGMENT; |
| if (!(info->key.tun_flags & TUNNEL_CSUM)) |
| flags |= NFT_TUNNEL_F_ZERO_CSUM_TX; |
| if (info->key.tun_flags & TUNNEL_SEQ) |
| flags |= NFT_TUNNEL_F_SEQ_NUMBER; |
| |
| if (nla_put_be32(skb, NFTA_TUNNEL_KEY_FLAGS, htonl(flags)) < 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int nft_tunnel_obj_dump(struct sk_buff *skb, |
| struct nft_object *obj, bool reset) |
| { |
| struct nft_tunnel_obj *priv = nft_obj_data(obj); |
| struct ip_tunnel_info *info = &priv->md->u.tun_info; |
| |
| if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ID, |
| tunnel_id_to_key32(info->key.tun_id)) || |
| nft_tunnel_ip_dump(skb, info) < 0 || |
| nft_tunnel_ports_dump(skb, info) < 0 || |
| nft_tunnel_flags_dump(skb, info) < 0 || |
| nla_put_u8(skb, NFTA_TUNNEL_KEY_TOS, info->key.tos) || |
| nla_put_u8(skb, NFTA_TUNNEL_KEY_TTL, info->key.ttl) || |
| nft_tunnel_opts_dump(skb, priv) < 0) |
| goto nla_put_failure; |
| |
| return 0; |
| |
| nla_put_failure: |
| return -1; |
| } |
| |
| static void nft_tunnel_obj_destroy(const struct nft_ctx *ctx, |
| struct nft_object *obj) |
| { |
| struct nft_tunnel_obj *priv = nft_obj_data(obj); |
| |
| metadata_dst_free(priv->md); |
| } |
| |
| static struct nft_object_type nft_tunnel_obj_type; |
| static const struct nft_object_ops nft_tunnel_obj_ops = { |
| .type = &nft_tunnel_obj_type, |
| .size = sizeof(struct nft_tunnel_obj), |
| .eval = nft_tunnel_obj_eval, |
| .init = nft_tunnel_obj_init, |
| .destroy = nft_tunnel_obj_destroy, |
| .dump = nft_tunnel_obj_dump, |
| }; |
| |
| static struct nft_object_type nft_tunnel_obj_type __read_mostly = { |
| .type = NFT_OBJECT_TUNNEL, |
| .ops = &nft_tunnel_obj_ops, |
| .maxattr = NFTA_TUNNEL_KEY_MAX, |
| .policy = nft_tunnel_key_policy, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int __init nft_tunnel_module_init(void) |
| { |
| int err; |
| |
| err = nft_register_expr(&nft_tunnel_type); |
| if (err < 0) |
| return err; |
| |
| err = nft_register_obj(&nft_tunnel_obj_type); |
| if (err < 0) |
| nft_unregister_expr(&nft_tunnel_type); |
| |
| return err; |
| } |
| |
| static void __exit nft_tunnel_module_exit(void) |
| { |
| nft_unregister_obj(&nft_tunnel_obj_type); |
| nft_unregister_expr(&nft_tunnel_type); |
| } |
| |
| module_init(nft_tunnel_module_init); |
| module_exit(nft_tunnel_module_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>"); |
| MODULE_ALIAS_NFT_EXPR("tunnel"); |
| MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_TUNNEL); |
| MODULE_DESCRIPTION("nftables tunnel expression support"); |