mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
9f8f1933dc
drivers/net/ethernet/freescale/fec.h7d650df99d
("net: fec: add pm_qos support on imx6q platform")40c79ce13b
("net: fec: add stop mode support for imx8 platform") Signed-off-by: Paolo Abeni <pabeni@redhat.com>
570 lines
12 KiB
C
570 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* SR-IPv6 implementation
|
|
*
|
|
* Author:
|
|
* David Lebrun <david.lebrun@uclouvain.be>
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/net.h>
|
|
#include <linux/in6.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/rhashtable.h>
|
|
|
|
#include <net/ipv6.h>
|
|
#include <net/protocol.h>
|
|
|
|
#include <net/seg6.h>
|
|
#include <net/genetlink.h>
|
|
#include <linux/seg6.h>
|
|
#include <linux/seg6_genl.h>
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
#include <net/seg6_hmac.h>
|
|
#endif
|
|
|
|
bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced)
|
|
{
|
|
unsigned int tlv_offset;
|
|
int max_last_entry;
|
|
int trailing;
|
|
|
|
if (srh->type != IPV6_SRCRT_TYPE_4)
|
|
return false;
|
|
|
|
if (((srh->hdrlen + 1) << 3) != len)
|
|
return false;
|
|
|
|
if (!reduced && srh->segments_left > srh->first_segment) {
|
|
return false;
|
|
} else {
|
|
max_last_entry = (srh->hdrlen / 2) - 1;
|
|
|
|
if (srh->first_segment > max_last_entry)
|
|
return false;
|
|
|
|
if (srh->segments_left > srh->first_segment + 1)
|
|
return false;
|
|
}
|
|
|
|
tlv_offset = sizeof(*srh) + ((srh->first_segment + 1) << 4);
|
|
|
|
trailing = len - tlv_offset;
|
|
if (trailing < 0)
|
|
return false;
|
|
|
|
while (trailing) {
|
|
struct sr6_tlv *tlv;
|
|
unsigned int tlv_len;
|
|
|
|
if (trailing < sizeof(*tlv))
|
|
return false;
|
|
|
|
tlv = (struct sr6_tlv *)((unsigned char *)srh + tlv_offset);
|
|
tlv_len = sizeof(*tlv) + tlv->len;
|
|
|
|
trailing -= tlv_len;
|
|
if (trailing < 0)
|
|
return false;
|
|
|
|
tlv_offset += tlv_len;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags)
|
|
{
|
|
struct ipv6_sr_hdr *srh;
|
|
int len, srhoff = 0;
|
|
|
|
if (ipv6_find_hdr(skb, &srhoff, IPPROTO_ROUTING, NULL, &flags) < 0)
|
|
return NULL;
|
|
|
|
if (!pskb_may_pull(skb, srhoff + sizeof(*srh)))
|
|
return NULL;
|
|
|
|
srh = (struct ipv6_sr_hdr *)(skb->data + srhoff);
|
|
|
|
len = (srh->hdrlen + 1) << 3;
|
|
|
|
if (!pskb_may_pull(skb, srhoff + len))
|
|
return NULL;
|
|
|
|
/* note that pskb_may_pull may change pointers in header;
|
|
* for this reason it is necessary to reload them when needed.
|
|
*/
|
|
srh = (struct ipv6_sr_hdr *)(skb->data + srhoff);
|
|
|
|
if (!seg6_validate_srh(srh, len, true))
|
|
return NULL;
|
|
|
|
return srh;
|
|
}
|
|
|
|
/* Determine if an ICMP invoking packet contains a segment routing
|
|
* header. If it does, extract the offset to the true destination
|
|
* address, which is in the first segment address.
|
|
*/
|
|
void seg6_icmp_srh(struct sk_buff *skb, struct inet6_skb_parm *opt)
|
|
{
|
|
__u16 network_header = skb->network_header;
|
|
struct ipv6_sr_hdr *srh;
|
|
|
|
/* Update network header to point to the invoking packet
|
|
* inside the ICMP packet, so we can use the seg6_get_srh()
|
|
* helper.
|
|
*/
|
|
skb_reset_network_header(skb);
|
|
|
|
srh = seg6_get_srh(skb, 0);
|
|
if (!srh)
|
|
goto out;
|
|
|
|
if (srh->type != IPV6_SRCRT_TYPE_4)
|
|
goto out;
|
|
|
|
opt->flags |= IP6SKB_SEG6;
|
|
opt->srhoff = (unsigned char *)srh - skb->data;
|
|
|
|
out:
|
|
/* Restore the network header back to the ICMP packet */
|
|
skb->network_header = network_header;
|
|
}
|
|
|
|
static struct genl_family seg6_genl_family;
|
|
|
|
static const struct nla_policy seg6_genl_policy[SEG6_ATTR_MAX + 1] = {
|
|
[SEG6_ATTR_DST] = { .type = NLA_BINARY,
|
|
.len = sizeof(struct in6_addr) },
|
|
[SEG6_ATTR_DSTLEN] = { .type = NLA_S32, },
|
|
[SEG6_ATTR_HMACKEYID] = { .type = NLA_U32, },
|
|
[SEG6_ATTR_SECRET] = { .type = NLA_BINARY, },
|
|
[SEG6_ATTR_SECRETLEN] = { .type = NLA_U8, },
|
|
[SEG6_ATTR_ALGID] = { .type = NLA_U8, },
|
|
[SEG6_ATTR_HMACINFO] = { .type = NLA_NESTED, },
|
|
};
|
|
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
|
|
static int seg6_genl_sethmac(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct net *net = genl_info_net(info);
|
|
struct seg6_pernet_data *sdata;
|
|
struct seg6_hmac_info *hinfo;
|
|
u32 hmackeyid;
|
|
char *secret;
|
|
int err = 0;
|
|
u8 algid;
|
|
u8 slen;
|
|
|
|
sdata = seg6_pernet(net);
|
|
|
|
if (!info->attrs[SEG6_ATTR_HMACKEYID] ||
|
|
!info->attrs[SEG6_ATTR_SECRETLEN] ||
|
|
!info->attrs[SEG6_ATTR_ALGID])
|
|
return -EINVAL;
|
|
|
|
hmackeyid = nla_get_u32(info->attrs[SEG6_ATTR_HMACKEYID]);
|
|
slen = nla_get_u8(info->attrs[SEG6_ATTR_SECRETLEN]);
|
|
algid = nla_get_u8(info->attrs[SEG6_ATTR_ALGID]);
|
|
|
|
if (hmackeyid == 0)
|
|
return -EINVAL;
|
|
|
|
if (slen > SEG6_HMAC_SECRET_LEN)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&sdata->lock);
|
|
hinfo = seg6_hmac_info_lookup(net, hmackeyid);
|
|
|
|
if (!slen) {
|
|
err = seg6_hmac_info_del(net, hmackeyid);
|
|
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (!info->attrs[SEG6_ATTR_SECRET]) {
|
|
err = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (slen > nla_len(info->attrs[SEG6_ATTR_SECRET])) {
|
|
err = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (hinfo) {
|
|
err = seg6_hmac_info_del(net, hmackeyid);
|
|
if (err)
|
|
goto out_unlock;
|
|
}
|
|
|
|
secret = (char *)nla_data(info->attrs[SEG6_ATTR_SECRET]);
|
|
|
|
hinfo = kzalloc(sizeof(*hinfo), GFP_KERNEL);
|
|
if (!hinfo) {
|
|
err = -ENOMEM;
|
|
goto out_unlock;
|
|
}
|
|
|
|
memcpy(hinfo->secret, secret, slen);
|
|
hinfo->slen = slen;
|
|
hinfo->alg_id = algid;
|
|
hinfo->hmackeyid = hmackeyid;
|
|
|
|
err = seg6_hmac_info_add(net, hmackeyid, hinfo);
|
|
if (err)
|
|
kfree(hinfo);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&sdata->lock);
|
|
return err;
|
|
}
|
|
|
|
#else
|
|
|
|
static int seg6_genl_sethmac(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
#endif
|
|
|
|
static int seg6_genl_set_tunsrc(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct net *net = genl_info_net(info);
|
|
struct in6_addr *val, *t_old, *t_new;
|
|
struct seg6_pernet_data *sdata;
|
|
|
|
sdata = seg6_pernet(net);
|
|
|
|
if (!info->attrs[SEG6_ATTR_DST])
|
|
return -EINVAL;
|
|
|
|
val = nla_data(info->attrs[SEG6_ATTR_DST]);
|
|
t_new = kmemdup(val, sizeof(*val), GFP_KERNEL);
|
|
if (!t_new)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&sdata->lock);
|
|
|
|
t_old = sdata->tun_src;
|
|
rcu_assign_pointer(sdata->tun_src, t_new);
|
|
|
|
mutex_unlock(&sdata->lock);
|
|
|
|
synchronize_net();
|
|
kfree(t_old);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int seg6_genl_get_tunsrc(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct net *net = genl_info_net(info);
|
|
struct in6_addr *tun_src;
|
|
struct sk_buff *msg;
|
|
void *hdr;
|
|
|
|
msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
|
|
&seg6_genl_family, 0, SEG6_CMD_GET_TUNSRC);
|
|
if (!hdr)
|
|
goto free_msg;
|
|
|
|
rcu_read_lock();
|
|
tun_src = rcu_dereference(seg6_pernet(net)->tun_src);
|
|
|
|
if (nla_put(msg, SEG6_ATTR_DST, sizeof(struct in6_addr), tun_src))
|
|
goto nla_put_failure;
|
|
|
|
rcu_read_unlock();
|
|
|
|
genlmsg_end(msg, hdr);
|
|
return genlmsg_reply(msg, info);
|
|
|
|
nla_put_failure:
|
|
rcu_read_unlock();
|
|
free_msg:
|
|
nlmsg_free(msg);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
|
|
static int __seg6_hmac_fill_info(struct seg6_hmac_info *hinfo,
|
|
struct sk_buff *msg)
|
|
{
|
|
if (nla_put_u32(msg, SEG6_ATTR_HMACKEYID, hinfo->hmackeyid) ||
|
|
nla_put_u8(msg, SEG6_ATTR_SECRETLEN, hinfo->slen) ||
|
|
nla_put(msg, SEG6_ATTR_SECRET, hinfo->slen, hinfo->secret) ||
|
|
nla_put_u8(msg, SEG6_ATTR_ALGID, hinfo->alg_id))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __seg6_genl_dumphmac_element(struct seg6_hmac_info *hinfo,
|
|
u32 portid, u32 seq, u32 flags,
|
|
struct sk_buff *skb, u8 cmd)
|
|
{
|
|
void *hdr;
|
|
|
|
hdr = genlmsg_put(skb, portid, seq, &seg6_genl_family, flags, cmd);
|
|
if (!hdr)
|
|
return -ENOMEM;
|
|
|
|
if (__seg6_hmac_fill_info(hinfo, skb) < 0)
|
|
goto nla_put_failure;
|
|
|
|
genlmsg_end(skb, hdr);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
genlmsg_cancel(skb, hdr);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int seg6_genl_dumphmac_start(struct netlink_callback *cb)
|
|
{
|
|
struct net *net = sock_net(cb->skb->sk);
|
|
struct seg6_pernet_data *sdata;
|
|
struct rhashtable_iter *iter;
|
|
|
|
sdata = seg6_pernet(net);
|
|
iter = (struct rhashtable_iter *)cb->args[0];
|
|
|
|
if (!iter) {
|
|
iter = kmalloc(sizeof(*iter), GFP_KERNEL);
|
|
if (!iter)
|
|
return -ENOMEM;
|
|
|
|
cb->args[0] = (long)iter;
|
|
}
|
|
|
|
rhashtable_walk_enter(&sdata->hmac_infos, iter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int seg6_genl_dumphmac_done(struct netlink_callback *cb)
|
|
{
|
|
struct rhashtable_iter *iter = (struct rhashtable_iter *)cb->args[0];
|
|
|
|
rhashtable_walk_exit(iter);
|
|
|
|
kfree(iter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int seg6_genl_dumphmac(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct rhashtable_iter *iter = (struct rhashtable_iter *)cb->args[0];
|
|
struct seg6_hmac_info *hinfo;
|
|
int ret;
|
|
|
|
rhashtable_walk_start(iter);
|
|
|
|
for (;;) {
|
|
hinfo = rhashtable_walk_next(iter);
|
|
|
|
if (IS_ERR(hinfo)) {
|
|
if (PTR_ERR(hinfo) == -EAGAIN)
|
|
continue;
|
|
ret = PTR_ERR(hinfo);
|
|
goto done;
|
|
} else if (!hinfo) {
|
|
break;
|
|
}
|
|
|
|
ret = __seg6_genl_dumphmac_element(hinfo,
|
|
NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq,
|
|
NLM_F_MULTI,
|
|
skb, SEG6_CMD_DUMPHMAC);
|
|
if (ret)
|
|
goto done;
|
|
}
|
|
|
|
ret = skb->len;
|
|
|
|
done:
|
|
rhashtable_walk_stop(iter);
|
|
return ret;
|
|
}
|
|
|
|
#else
|
|
|
|
static int seg6_genl_dumphmac_start(struct netlink_callback *cb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int seg6_genl_dumphmac_done(struct netlink_callback *cb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int seg6_genl_dumphmac(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
#endif
|
|
|
|
static int __net_init seg6_net_init(struct net *net)
|
|
{
|
|
struct seg6_pernet_data *sdata;
|
|
|
|
sdata = kzalloc(sizeof(*sdata), GFP_KERNEL);
|
|
if (!sdata)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&sdata->lock);
|
|
|
|
sdata->tun_src = kzalloc(sizeof(*sdata->tun_src), GFP_KERNEL);
|
|
if (!sdata->tun_src) {
|
|
kfree(sdata);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
net->ipv6.seg6_data = sdata;
|
|
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
if (seg6_hmac_net_init(net)) {
|
|
kfree(rcu_dereference_raw(sdata->tun_src));
|
|
kfree(sdata);
|
|
return -ENOMEM;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit seg6_net_exit(struct net *net)
|
|
{
|
|
struct seg6_pernet_data *sdata = seg6_pernet(net);
|
|
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
seg6_hmac_net_exit(net);
|
|
#endif
|
|
|
|
kfree(rcu_dereference_raw(sdata->tun_src));
|
|
kfree(sdata);
|
|
}
|
|
|
|
static struct pernet_operations ip6_segments_ops = {
|
|
.init = seg6_net_init,
|
|
.exit = seg6_net_exit,
|
|
};
|
|
|
|
static const struct genl_ops seg6_genl_ops[] = {
|
|
{
|
|
.cmd = SEG6_CMD_SETHMAC,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = seg6_genl_sethmac,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = SEG6_CMD_DUMPHMAC,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.start = seg6_genl_dumphmac_start,
|
|
.dumpit = seg6_genl_dumphmac,
|
|
.done = seg6_genl_dumphmac_done,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = SEG6_CMD_SET_TUNSRC,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = seg6_genl_set_tunsrc,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = SEG6_CMD_GET_TUNSRC,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = seg6_genl_get_tunsrc,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
};
|
|
|
|
static struct genl_family seg6_genl_family __ro_after_init = {
|
|
.hdrsize = 0,
|
|
.name = SEG6_GENL_NAME,
|
|
.version = SEG6_GENL_VERSION,
|
|
.maxattr = SEG6_ATTR_MAX,
|
|
.policy = seg6_genl_policy,
|
|
.netnsok = true,
|
|
.parallel_ops = true,
|
|
.ops = seg6_genl_ops,
|
|
.n_ops = ARRAY_SIZE(seg6_genl_ops),
|
|
.resv_start_op = SEG6_CMD_GET_TUNSRC + 1,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
int __init seg6_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = genl_register_family(&seg6_genl_family);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = register_pernet_subsys(&ip6_segments_ops);
|
|
if (err)
|
|
goto out_unregister_genl;
|
|
|
|
#ifdef CONFIG_IPV6_SEG6_LWTUNNEL
|
|
err = seg6_iptunnel_init();
|
|
if (err)
|
|
goto out_unregister_pernet;
|
|
|
|
err = seg6_local_init();
|
|
if (err)
|
|
goto out_unregister_pernet;
|
|
#endif
|
|
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
err = seg6_hmac_init();
|
|
if (err)
|
|
goto out_unregister_iptun;
|
|
#endif
|
|
|
|
pr_info("Segment Routing with IPv6\n");
|
|
|
|
out:
|
|
return err;
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
out_unregister_iptun:
|
|
#ifdef CONFIG_IPV6_SEG6_LWTUNNEL
|
|
seg6_local_exit();
|
|
seg6_iptunnel_exit();
|
|
#endif
|
|
#endif
|
|
#ifdef CONFIG_IPV6_SEG6_LWTUNNEL
|
|
out_unregister_pernet:
|
|
unregister_pernet_subsys(&ip6_segments_ops);
|
|
#endif
|
|
out_unregister_genl:
|
|
genl_unregister_family(&seg6_genl_family);
|
|
goto out;
|
|
}
|
|
|
|
void seg6_exit(void)
|
|
{
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
seg6_hmac_exit();
|
|
#endif
|
|
#ifdef CONFIG_IPV6_SEG6_LWTUNNEL
|
|
seg6_iptunnel_exit();
|
|
#endif
|
|
unregister_pernet_subsys(&ip6_segments_ops);
|
|
genl_unregister_family(&seg6_genl_family);
|
|
}
|