diff options
Diffstat (limited to 'net/core/rtnetlink.c')
-rw-r--r-- | net/core/rtnetlink.c | 220 |
1 files changed, 200 insertions, 20 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index e4ec575c1fba..0b5ccb7c9bc8 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -980,6 +980,19 @@ static size_t rtnl_xdp_size(void) return xdp_size; } +static size_t rtnl_prop_list_size(const struct net_device *dev) +{ + struct netdev_name_node *name_node; + size_t size; + + if (list_empty(&dev->name_node->list)) + return 0; + size = nla_total_size(0); + list_for_each_entry(name_node, &dev->name_node->list, list) + size += nla_total_size(ALTIFNAMSIZ); + return size; +} + static noinline size_t if_nlmsg_size(const struct net_device *dev, u32 ext_filter_mask) { @@ -1027,6 +1040,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev, + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */ + nla_total_size(4) /* IFLA_MIN_MTU */ + nla_total_size(4) /* IFLA_MAX_MTU */ + + rtnl_prop_list_size(dev) + 0; } @@ -1204,6 +1218,8 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, struct ifla_vf_mac vf_mac; struct ifla_vf_broadcast vf_broadcast; struct ifla_vf_info ivi; + struct ifla_vf_guid node_guid; + struct ifla_vf_guid port_guid; memset(&ivi, 0, sizeof(ivi)); @@ -1270,6 +1286,18 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, nla_put(skb, IFLA_VF_TRUST, sizeof(vf_trust), &vf_trust)) goto nla_put_vf_failure; + + memset(&node_guid, 0, sizeof(node_guid)); + memset(&port_guid, 0, sizeof(port_guid)); + if (dev->netdev_ops->ndo_get_vf_guid && + !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid, + &port_guid)) { + if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid), + &node_guid) || + nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid), + &port_guid)) + goto nla_put_vf_failure; + } vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST); if (!vfvlanlist) goto nla_put_vf_failure; @@ -1584,6 +1612,42 @@ static int rtnl_fill_link_af(struct sk_buff *skb, return 0; } +static int rtnl_fill_alt_ifnames(struct sk_buff *skb, + const struct net_device *dev) +{ + struct netdev_name_node *name_node; + int count = 0; + + list_for_each_entry(name_node, &dev->name_node->list, list) { + if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name)) + return -EMSGSIZE; + count++; + } + return count; +} + +static int rtnl_fill_prop_list(struct sk_buff *skb, + const struct net_device *dev) +{ + struct nlattr *prop_list; + int ret; + + prop_list = nla_nest_start(skb, IFLA_PROP_LIST); + if (!prop_list) + return -EMSGSIZE; + + ret = rtnl_fill_alt_ifnames(skb, dev); + if (ret <= 0) + goto nest_cancel; + + nla_nest_end(skb, prop_list); + return 0; + +nest_cancel: + nla_nest_cancel(skb, prop_list); + return ret; +} + static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, struct net *src_net, int type, u32 pid, u32 seq, u32 change, @@ -1697,6 +1761,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, goto nla_put_failure_rcu; rcu_read_unlock(); + if (rtnl_fill_prop_list(skb, dev)) + goto nla_put_failure; + nlmsg_end(skb, nlh); return 0; @@ -1750,6 +1817,9 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = { [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 }, [IFLA_MIN_MTU] = { .type = NLA_U32 }, [IFLA_MAX_MTU] = { .type = NLA_U32 }, + [IFLA_PROP_LIST] = { .type = NLA_NESTED }, + [IFLA_ALT_IFNAME] = { .type = NLA_STRING, + .len = ALTIFNAMSIZ - 1 }, }; static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { @@ -2744,6 +2814,26 @@ errout: return err; } +static struct net_device *rtnl_dev_get(struct net *net, + struct nlattr *ifname_attr, + struct nlattr *altifname_attr, + char *ifname) +{ + char buffer[ALTIFNAMSIZ]; + + if (!ifname) { + ifname = buffer; + if (ifname_attr) + nla_strlcpy(ifname, ifname_attr, IFNAMSIZ); + else if (altifname_attr) + nla_strlcpy(ifname, altifname_attr, ALTIFNAMSIZ); + else + return NULL; + } + + return __dev_get_by_name(net, ifname); +} + static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { @@ -2772,8 +2862,8 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, ifm = nlmsg_data(nlh); if (ifm->ifi_index > 0) dev = __dev_get_by_index(net, ifm->ifi_index); - else if (tb[IFLA_IFNAME]) - dev = __dev_get_by_name(net, ifname); + else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) + dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); else goto errout; @@ -2846,7 +2936,6 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, struct net *tgt_net = net; struct net_device *dev = NULL; struct ifinfomsg *ifm; - char ifname[IFNAMSIZ]; struct nlattr *tb[IFLA_MAX+1]; int err; int netnsid = -1; @@ -2860,9 +2949,6 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) return err; - if (tb[IFLA_IFNAME]) - nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); - if (tb[IFLA_TARGET_NETNSID]) { netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); @@ -2874,8 +2960,9 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, ifm = nlmsg_data(nlh); if (ifm->ifi_index > 0) dev = __dev_get_by_index(tgt_net, ifm->ifi_index); - else if (tb[IFLA_IFNAME]) - dev = __dev_get_by_name(tgt_net, ifname); + else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) + dev = rtnl_dev_get(net, tb[IFLA_IFNAME], + tb[IFLA_ALT_IFNAME], NULL); else if (tb[IFLA_GROUP]) err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP])); else @@ -3046,12 +3133,10 @@ replay: ifm = nlmsg_data(nlh); if (ifm->ifi_index > 0) dev = __dev_get_by_index(net, ifm->ifi_index); - else { - if (ifname[0]) - dev = __dev_get_by_name(net, ifname); - else - dev = NULL; - } + else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) + dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); + else + dev = NULL; if (dev) { master_dev = netdev_master_upper_dev_get(dev); @@ -3313,6 +3398,7 @@ static int rtnl_valid_getlink_req(struct sk_buff *skb, switch (i) { case IFLA_IFNAME: + case IFLA_ALT_IFNAME: case IFLA_EXT_MASK: case IFLA_TARGET_NETNSID: break; @@ -3331,7 +3417,6 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, struct net *net = sock_net(skb->sk); struct net *tgt_net = net; struct ifinfomsg *ifm; - char ifname[IFNAMSIZ]; struct nlattr *tb[IFLA_MAX+1]; struct net_device *dev = NULL; struct sk_buff *nskb; @@ -3354,9 +3439,6 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, return PTR_ERR(tgt_net); } - if (tb[IFLA_IFNAME]) - nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); - if (tb[IFLA_EXT_MASK]) ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); @@ -3364,8 +3446,9 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, ifm = nlmsg_data(nlh); if (ifm->ifi_index > 0) dev = __dev_get_by_index(tgt_net, ifm->ifi_index); - else if (tb[IFLA_IFNAME]) - dev = __dev_get_by_name(tgt_net, ifname); + else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) + dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME], + tb[IFLA_ALT_IFNAME], NULL); else goto out; @@ -3395,6 +3478,100 @@ out: return err; } +static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr, + bool *changed, struct netlink_ext_ack *extack) +{ + char *alt_ifname; + int err; + + err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack); + if (err) + return err; + + alt_ifname = nla_data(attr); + if (cmd == RTM_NEWLINKPROP) { + alt_ifname = kstrdup(alt_ifname, GFP_KERNEL); + if (!alt_ifname) + return -ENOMEM; + err = netdev_name_node_alt_create(dev, alt_ifname); + if (err) { + kfree(alt_ifname); + return err; + } + } else if (cmd == RTM_DELLINKPROP) { + err = netdev_name_node_alt_destroy(dev, alt_ifname); + if (err) + return err; + } else { + WARN_ON(1); + return 0; + } + + *changed = true; + return 0; +} + +static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + struct net *net = sock_net(skb->sk); + struct nlattr *tb[IFLA_MAX + 1]; + struct net_device *dev; + struct ifinfomsg *ifm; + bool changed = false; + struct nlattr *attr; + int err, rem; + + err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); + if (err) + return err; + + err = rtnl_ensure_unique_netns(tb, extack, true); + if (err) + return err; + + ifm = nlmsg_data(nlh); + if (ifm->ifi_index > 0) + dev = __dev_get_by_index(net, ifm->ifi_index); + else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) + dev = rtnl_dev_get(net, tb[IFLA_IFNAME], + tb[IFLA_ALT_IFNAME], NULL); + else + return -EINVAL; + + if (!dev) + return -ENODEV; + + if (!tb[IFLA_PROP_LIST]) + return 0; + + nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) { + switch (nla_type(attr)) { + case IFLA_ALT_IFNAME: + err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack); + if (err) + return err; + break; + } + } + + if (changed) + netdev_state_change(dev); + return 0; +} + +static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack); +} + +static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack); +} + static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) { struct net *net = sock_net(skb->sk); @@ -5353,6 +5530,9 @@ void __init rtnetlink_init(void) rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); + rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0); + rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0); + rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0); |