void br_set_state(struct net_bridge_port *p, unsigned int state)
{
struct switchdev_attr attr = {
.orig_dev = p->dev,
.id = SWITCHDEV_ATTR_ID_PORT_STP_STATE,
.flags = SWITCHDEV_F_DEFER,
.u.stp_state = state,
};
int err;
p->state = state;
err = switchdev_port_attr_set(p->dev, &attr);
if (err && err != -EOPNOTSUPP)
br_warn(p->br, "error setting offload STP state on port %u(%s)\n",
(unsigned int) p->port_no, p->dev->name);
else
br_info(p->br, "port %u(%s) entered %s state\n",
(unsigned int) p->port_no, p->dev->name,
br_port_state_names[p->state]);
}
/* Caller must hold RTNL. */
int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
{
struct trie *t = (struct trie *)tb->tb_data;
struct fib_alias *fa, *new_fa;
struct key_vector *l, *tp;
struct fib_info *fi;
u8 plen = cfg->fc_dst_len;
u8 slen = KEYLENGTH - plen;
u8 tos = cfg->fc_tos;
u32 key;
int err;
if (plen > KEYLENGTH)
return -EINVAL;
key = ntohl(cfg->fc_dst);
pr_debug("Insert table=%u %08x/%d\n", tb->tb_id, key, plen);
if ((plen < KEYLENGTH) && (key << plen))
return -EINVAL;
fi = fib_create_info(cfg);
if (IS_ERR(fi)) {
err = PTR_ERR(fi);
goto err;
}
l = fib_find_node(t, &tp, key);
fa = l ? fib_find_alias(&l->leaf, slen, tos, fi->fib_priority) : NULL;
/* Now fa, if non-NULL, points to the first fib alias
* with the same keys [prefix,tos,priority], if such key already
* exists or to the node before which we will insert new one.
*
* If fa is NULL, we will need to allocate a new one and
* insert to the tail of the section matching the suffix length
* of the new alias.
*/
if (fa && fa->fa_tos == tos &&
fa->fa_info->fib_priority == fi->fib_priority) {
struct fib_alias *fa_first, *fa_match;
err = -EEXIST;
if (cfg->fc_nlflags & NLM_F_EXCL)
goto out;
/* We have 2 goals:
* 1. Find exact match for type, scope, fib_info to avoid
* duplicate routes
* 2. Find next 'fa' (or head), NLM_F_APPEND inserts before it
*/
fa_match = NULL;
fa_first = fa;
hlist_for_each_entry_from(fa, fa_list) {
if ((fa->fa_slen != slen) || (fa->fa_tos != tos))
break;
if (fa->fa_info->fib_priority != fi->fib_priority)
break;
if (fa->fa_type == cfg->fc_type &&
fa->fa_info == fi) {
fa_match = fa;
break;
}
}
if (cfg->fc_nlflags & NLM_F_REPLACE) {
struct fib_info *fi_drop;
u8 state;
fa = fa_first;
if (fa_match) {
if (fa == fa_match)
err = 0;
goto out;
}
err = -ENOBUFS;
new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
if (new_fa == NULL)
goto out;
fi_drop = fa->fa_info;
new_fa->fa_tos = fa->fa_tos;
new_fa->fa_info = fi;
new_fa->fa_type = cfg->fc_type;
state = fa->fa_state;
new_fa->fa_state = state & ~FA_S_ACCESSED;
new_fa->fa_slen = fa->fa_slen;
err = netdev_switch_fib_ipv4_add(key, plen, fi,
new_fa->fa_tos,
cfg->fc_type,
cfg->fc_nlflags,
tb->tb_id);
if (err) {
netdev_switch_fib_ipv4_abort(fi);
kmem_cache_free(fn_alias_kmem, new_fa);
goto out;
}
hlist_replace_rcu(&fa->fa_list, &new_fa->fa_list);
alias_free_mem_rcu(fa);
fib_release_info(fi_drop);
if (state & FA_S_ACCESSED)
rt_cache_flush(cfg->fc_nlinfo.nl_net);
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen,
tb->tb_id, &cfg->fc_nlinfo, NLM_F_REPLACE);
goto succeeded;
}
/* Error if we find a perfect match which
* uses the same scope, type, and nexthop
* information.
*/
if (fa_match)
goto out;
if (!(cfg->fc_nlflags & NLM_F_APPEND))
fa = fa_first;
}
err = -ENOENT;
if (!(cfg->fc_nlflags & NLM_F_CREATE))
goto out;
err = -ENOBUFS;
new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
if (new_fa == NULL)
goto out;
new_fa->fa_info = fi;
new_fa->fa_tos = tos;
new_fa->fa_type = cfg->fc_type;
new_fa->fa_state = 0;
new_fa->fa_slen = slen;
/* (Optionally) offload fib entry to switch hardware. */
err = netdev_switch_fib_ipv4_add(key, plen, fi, tos,
cfg->fc_type,
cfg->fc_nlflags,
tb->tb_id);
if (err) {
netdev_switch_fib_ipv4_abort(fi);
goto out_free_new_fa;
}
/* Insert new entry to the list. */
err = fib_insert_alias(t, tp, l, new_fa, fa, key);
if (err)
goto out_sw_fib_del;
if (!plen)
tb->tb_num_default++;
rt_cache_flush(cfg->fc_nlinfo.nl_net);
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, tb->tb_id,
&cfg->fc_nlinfo, 0);
succeeded:
return 0;
out_sw_fib_del:
netdev_switch_fib_ipv4_del(key, plen, fi, tos, cfg->fc_type, tb->tb_id);
out_free_new_fa:
kmem_cache_free(fn_alias_kmem, new_fa);
out:
fib_release_info(fi);
err:
return err;
}
/**
* netdev_switch_fib_ipv4_add - Add IPv4 route entry to switch
*
* @dst: route's IPv4 destination address
* @dst_len: destination address length (prefix length)
* @fi: route FIB info structure
* @tos: route TOS
* @type: route type
* @nlflags: netlink flags passed in (NLM_F_*)
* @tb_id: route table ID
*
* Add IPv4 route entry to switch device.
*/
int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 nlflags, u32 tb_id)
{
struct net_device *dev;
const struct swdev_ops *ops;
int err = 0;
/* Don't offload route if using custom ip rules or if
* IPv4 FIB offloading has been disabled completely.
*/
#ifdef CONFIG_IP_MULTIPLE_TABLES
if (fi->fib_net->ipv4.fib_has_custom_rules)
return 0;
#endif
if (fi->fib_net->ipv4.fib_offload_disabled)
return 0;
dev = netdev_switch_get_dev_by_nhs(fi);
if (!dev)
return 0;
ops = dev->swdev_ops;
if (ops->swdev_fib_ipv4_add) {
err = ops->swdev_fib_ipv4_add(dev, htonl(dst), dst_len,
fi, tos, type, nlflags,
tb_id);
if (!err)
fi->fib_flags |= RTNH_F_OFFLOAD;
}
return err;
}
EXPORT_SYMBOL_GPL(netdev_switch_fib_ipv4_add);
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