881 lines
23 KiB
C
881 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 2016, Amir Vadai <amir@vadai.me>
|
|
* 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 <net/tc_wrapper.h>
|
|
|
|
#include <linux/tc_act/tc_tunnel_key.h>
|
|
#include <net/tc_act/tc_tunnel_key.h>
|
|
|
|
static struct tc_action_ops act_tunnel_key_ops;
|
|
|
|
TC_INDIRECT_SCOPE 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]);
|
|
md->gbp &= VXLAN_GBP_MASK;
|
|
}
|
|
|
|
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,
|
|
struct tcf_proto *tp, u32 act_flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct tc_action_net *tn = net_generic(net, act_tunnel_key_ops.net_id);
|
|
bool bind = act_flags & TCA_ACT_FLAGS_BIND;
|
|
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 (nla_get_flag(tb[TCA_TUNNEL_KEY_NO_FRAG]))
|
|
flags |= TUNNEL_DONT_FRAGMENT;
|
|
|
|
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, opts_len);
|
|
} 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 (!(act_flags & TCA_ACT_FLAGS_REPLACE)) {
|
|
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);
|
|
|
|
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)) ||
|
|
((key->tun_flags & TUNNEL_DONT_FRAGMENT) &&
|
|
nla_put_flag(skb, TCA_TUNNEL_KEY_NO_FRAG)) ||
|
|
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 void tcf_tunnel_encap_put_tunnel(void *priv)
|
|
{
|
|
struct ip_tunnel_info *tunnel = priv;
|
|
|
|
kfree(tunnel);
|
|
}
|
|
|
|
static int tcf_tunnel_encap_get_tunnel(struct flow_action_entry *entry,
|
|
const struct tc_action *act)
|
|
{
|
|
entry->tunnel = tcf_tunnel_info_copy(act);
|
|
if (!entry->tunnel)
|
|
return -ENOMEM;
|
|
entry->destructor = tcf_tunnel_encap_put_tunnel;
|
|
entry->destructor_priv = entry->tunnel;
|
|
return 0;
|
|
}
|
|
|
|
static int tcf_tunnel_key_offload_act_setup(struct tc_action *act,
|
|
void *entry_data,
|
|
u32 *index_inc,
|
|
bool bind,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int err;
|
|
|
|
if (bind) {
|
|
struct flow_action_entry *entry = entry_data;
|
|
|
|
if (is_tcf_tunnel_set(act)) {
|
|
entry->id = FLOW_ACTION_TUNNEL_ENCAP;
|
|
err = tcf_tunnel_encap_get_tunnel(entry, act);
|
|
if (err)
|
|
return err;
|
|
} else if (is_tcf_tunnel_release(act)) {
|
|
entry->id = FLOW_ACTION_TUNNEL_DECAP;
|
|
} else {
|
|
NL_SET_ERR_MSG_MOD(extack, "Unsupported tunnel key mode offload");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
*index_inc = 1;
|
|
} else {
|
|
struct flow_offload_action *fl_action = entry_data;
|
|
|
|
if (is_tcf_tunnel_set(act))
|
|
fl_action->id = FLOW_ACTION_TUNNEL_ENCAP;
|
|
else if (is_tcf_tunnel_release(act))
|
|
fl_action->id = FLOW_ACTION_TUNNEL_DECAP;
|
|
else
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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,
|
|
.offload_act_setup = tcf_tunnel_key_offload_act_setup,
|
|
.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, act_tunnel_key_ops.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, act_tunnel_key_ops.net_id);
|
|
}
|
|
|
|
static struct pernet_operations tunnel_key_net_ops = {
|
|
.init = tunnel_key_init_net,
|
|
.exit_batch = tunnel_key_exit_net,
|
|
.id = &act_tunnel_key_ops.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");
|