diff options
Diffstat (limited to 'net/core/rtnetlink.c')
-rw-r--r-- | net/core/rtnetlink.c | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 20d7135..62737f4 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1414,6 +1414,58 @@ static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, }; +static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) +{ + const struct rtnl_link_ops *ops = NULL; + struct nlattr *linfo[IFLA_INFO_MAX + 1]; + + if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) + return NULL; + + if (linfo[IFLA_INFO_KIND]) { + char kind[MODULE_NAME_LEN]; + + nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); + ops = rtnl_link_ops_get(kind); + } + + return ops; +} + +static bool link_master_filtered(struct net_device *dev, int master_idx) +{ + struct net_device *master; + + if (!master_idx) + return false; + + master = netdev_master_upper_dev_get(dev); + if (!master || master->ifindex != master_idx) + return true; + + return false; +} + +static bool link_kind_filtered(const struct net_device *dev, + const struct rtnl_link_ops *kind_ops) +{ + if (kind_ops && dev->rtnl_link_ops != kind_ops) + return true; + + return false; +} + +static bool link_dump_filtered(struct net_device *dev, + int master_idx, + const struct rtnl_link_ops *kind_ops) +{ + if (link_master_filtered(dev, master_idx) || + link_kind_filtered(dev, kind_ops)) + return true; + + return false; +} + static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); @@ -1423,6 +1475,9 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) struct hlist_head *head; struct nlattr *tb[IFLA_MAX+1]; u32 ext_filter_mask = 0; + const struct rtnl_link_ops *kind_ops = NULL; + unsigned int flags = NLM_F_MULTI; + int master_idx = 0; int err; int hdrlen; @@ -1445,18 +1500,29 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) if (tb[IFLA_EXT_MASK]) ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); + + if (tb[IFLA_MASTER]) + master_idx = nla_get_u32(tb[IFLA_MASTER]); + + if (tb[IFLA_LINKINFO]) + kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); + + if (master_idx || kind_ops) + flags |= NLM_F_DUMP_FILTERED; } for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { idx = 0; head = &net->dev_index_head[h]; hlist_for_each_entry(dev, head, index_hlist) { + if (link_dump_filtered(dev, master_idx, kind_ops)) + continue; if (idx < s_idx) goto cont; err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 0, - NLM_F_MULTI, + flags, ext_filter_mask); /* If we ran out of room on the first message, * we're in trouble |