a->rx_nohandler = b->rx_nohandler;
}
-static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
-{
- memcpy(v, b, sizeof(*b));
-}
-
/* All VF info */
static inline int rtnl_vfinfo_size(const struct net_device *dev,
u32 ext_filter_mask)
+ nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
+ nla_total_size(sizeof(struct rtnl_link_ifmap))
+ nla_total_size(sizeof(struct rtnl_link_stats))
- + nla_total_size(sizeof(struct rtnl_link_stats64))
+ + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
+ nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
+ nla_total_size(4) /* IFLA_TXQLEN */
static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
struct net_device *dev)
{
- const struct rtnl_link_stats64 *stats;
- struct rtnl_link_stats64 temp;
+ struct rtnl_link_stats64 *sp;
struct nlattr *attr;
+ int err;
- stats = dev_get_stats(dev, &temp);
+ err = nla_align_64bit(skb, IFLA_PAD);
+ if (err)
+ return err;
- attr = nla_reserve(skb, IFLA_STATS,
- sizeof(struct rtnl_link_stats));
+ attr = nla_reserve(skb, IFLA_STATS64,
+ sizeof(struct rtnl_link_stats64));
if (!attr)
return -EMSGSIZE;
- copy_rtnl_link_stats(nla_data(attr), stats);
+ sp = nla_data(attr);
+ dev_get_stats(dev, sp);
- attr = nla_reserve(skb, IFLA_STATS64,
- sizeof(struct rtnl_link_stats64));
+ attr = nla_reserve(skb, IFLA_STATS,
+ sizeof(struct rtnl_link_stats));
if (!attr)
return -EMSGSIZE;
- copy_rtnl_link_stats64(nla_data(attr), stats);
+ copy_rtnl_link_stats(nla_data(attr), sp);
return 0;
}
return err;
}
+static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
+ int type, u32 pid, u32 seq, u32 change,
+ unsigned int flags, unsigned int filter_mask)
+{
+ struct if_stats_msg *ifsm;
+ struct nlmsghdr *nlh;
+ struct nlattr *attr;
+
+ ASSERT_RTNL();
+
+ nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ ifsm = nlmsg_data(nlh);
+ ifsm->ifindex = dev->ifindex;
+ ifsm->filter_mask = filter_mask;
+
+ if (filter_mask & IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_64)) {
+ struct rtnl_link_stats64 *sp;
+ int err;
+
+ /* if necessary, add a zero length NOP attribute so that
+ * IFLA_STATS_LINK_64 will be 64-bit aligned
+ */
+ err = nla_align_64bit(skb, IFLA_STATS_UNSPEC);
+ if (err)
+ goto nla_put_failure;
+
+ attr = nla_reserve(skb, IFLA_STATS_LINK_64,
+ sizeof(struct rtnl_link_stats64));
+ if (!attr)
+ goto nla_put_failure;
+
+ sp = nla_data(attr);
+ dev_get_stats(dev, sp);
+ }
+
+ nlmsg_end(skb, nlh);
+
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+
+ return -EMSGSIZE;
+}
+
+static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = {
+ [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) },
+};
+
+static size_t if_nlmsg_stats_size(const struct net_device *dev,
+ u32 filter_mask)
+{
+ size_t size = 0;
+
+ if (filter_mask & IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_64))
+ size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
+
+ return size;
+}
+
+static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+ struct net *net = sock_net(skb->sk);
+ struct if_stats_msg *ifsm;
+ struct net_device *dev = NULL;
+ struct sk_buff *nskb;
+ u32 filter_mask;
+ int err;
+
+ ifsm = nlmsg_data(nlh);
+ if (ifsm->ifindex > 0)
+ dev = __dev_get_by_index(net, ifsm->ifindex);
+ else
+ return -EINVAL;
+
+ if (!dev)
+ return -ENODEV;
+
+ filter_mask = ifsm->filter_mask;
+ if (!filter_mask)
+ return -EINVAL;
+
+ nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
+ if (!nskb)
+ return -ENOBUFS;
+
+ err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
+ NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
+ 0, filter_mask);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(nskb);
+ } else {
+ err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
+ }
+
+ return err;
+}
+
+static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct if_stats_msg *ifsm;
+ int h, s_h;
+ int idx = 0, s_idx;
+ struct net_device *dev;
+ struct hlist_head *head;
+ unsigned int flags = NLM_F_MULTI;
+ u32 filter_mask = 0;
+ int err;
+
+ s_h = cb->args[0];
+ s_idx = cb->args[1];
+
+ cb->seq = net->dev_base_seq;
+
+ ifsm = nlmsg_data(cb->nlh);
+ filter_mask = ifsm->filter_mask;
+ if (!filter_mask)
+ return -EINVAL;
+
+ 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 (idx < s_idx)
+ goto cont;
+ err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, 0,
+ flags, filter_mask);
+ /* If we ran out of room on the first message,
+ * we're in trouble
+ */
+ WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
+
+ if (err < 0)
+ goto out;
+
+ nl_dump_check_consistent(cb, nlmsg_hdr(skb));
+cont:
+ idx++;
+ }
+ }
+out:
+ cb->args[1] = idx;
+ cb->args[0] = h;
+
+ return skb->len;
+}
+
/* Process one rtnetlink message. */
static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
+
+ rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
+ NULL);
}
projects / cascardo / linux.git / blobdiff