switchdev
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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) ", (unsigned int) p->port_no, p->dev->name); else br_info(p->br, "port %u(%s) entered %s state ", (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 ", 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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