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-rw-r--r--net/core/rtnetlink.c156
1 files changed, 150 insertions, 6 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index d69c4644f8f2..189cc78c77eb 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -71,9 +71,31 @@ void rtnl_lock(void)
}
EXPORT_SYMBOL(rtnl_lock);
+static struct sk_buff *defer_kfree_skb_list;
+void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
+{
+ if (head && tail) {
+ tail->next = defer_kfree_skb_list;
+ defer_kfree_skb_list = head;
+ }
+}
+EXPORT_SYMBOL(rtnl_kfree_skbs);
+
void __rtnl_unlock(void)
{
+ struct sk_buff *head = defer_kfree_skb_list;
+
+ defer_kfree_skb_list = NULL;
+
mutex_unlock(&rtnl_mutex);
+
+ while (head) {
+ struct sk_buff *next = head->next;
+
+ kfree_skb(head);
+ cond_resched();
+ head = next;
+ }
}
void rtnl_unlock(void)
@@ -869,6 +891,16 @@ static size_t rtnl_port_size(const struct net_device *dev,
return port_self_size;
}
+static size_t rtnl_xdp_size(const struct net_device *dev)
+{
+ size_t xdp_size = nla_total_size(1); /* XDP_ATTACHED */
+
+ if (!dev->netdev_ops->ndo_xdp)
+ return 0;
+ else
+ return xdp_size;
+}
+
static noinline size_t if_nlmsg_size(const struct net_device *dev,
u32 ext_filter_mask)
{
@@ -905,6 +937,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
+ nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
+ nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
+ nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
+ + rtnl_xdp_size(dev) /* IFLA_XDP */
+ nla_total_size(1); /* IFLA_PROTO_DOWN */
}
@@ -1189,6 +1222,33 @@ static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
return 0;
}
+static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
+{
+ struct netdev_xdp xdp_op = {};
+ struct nlattr *xdp;
+ int err;
+
+ if (!dev->netdev_ops->ndo_xdp)
+ return 0;
+ xdp = nla_nest_start(skb, IFLA_XDP);
+ if (!xdp)
+ return -EMSGSIZE;
+ xdp_op.command = XDP_QUERY_PROG;
+ err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
+ if (err)
+ goto err_cancel;
+ err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
+ if (err)
+ goto err_cancel;
+
+ nla_nest_end(skb, xdp);
+ return 0;
+
+err_cancel:
+ nla_nest_cancel(skb, xdp);
+ return err;
+}
+
static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
int type, u32 pid, u32 seq, u32 change,
unsigned int flags, u32 ext_filter_mask)
@@ -1285,6 +1345,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
if (rtnl_port_fill(skb, dev, ext_filter_mask))
goto nla_put_failure;
+ if (rtnl_xdp_fill(skb, dev))
+ goto nla_put_failure;
+
if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
if (rtnl_link_fill(skb, dev) < 0)
goto nla_put_failure;
@@ -1370,6 +1433,7 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
[IFLA_LINK_NETNSID] = { .type = NLA_S32 },
[IFLA_PROTO_DOWN] = { .type = NLA_U8 },
+ [IFLA_XDP] = { .type = NLA_NESTED },
};
static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
@@ -1407,6 +1471,11 @@ static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
[IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
};
+static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
+ [IFLA_XDP_FD] = { .type = NLA_S32 },
+ [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
+};
+
static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
{
const struct rtnl_link_ops *ops = NULL;
@@ -1905,11 +1974,19 @@ static int do_setlink(const struct sk_buff *skb,
if (tb[IFLA_TXQLEN]) {
unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
-
- if (dev->tx_queue_len ^ value)
+ unsigned long orig_len = dev->tx_queue_len;
+
+ if (dev->tx_queue_len ^ value) {
+ dev->tx_queue_len = value;
+ err = call_netdevice_notifiers(
+ NETDEV_CHANGE_TX_QUEUE_LEN, dev);
+ err = notifier_to_errno(err);
+ if (err) {
+ dev->tx_queue_len = orig_len;
+ goto errout;
+ }
status |= DO_SETLINK_NOTIFY;
-
- dev->tx_queue_len = value;
+ }
}
if (tb[IFLA_OPERSTATE])
@@ -2024,6 +2101,27 @@ static int do_setlink(const struct sk_buff *skb,
status |= DO_SETLINK_NOTIFY;
}
+ if (tb[IFLA_XDP]) {
+ struct nlattr *xdp[IFLA_XDP_MAX + 1];
+
+ err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
+ ifla_xdp_policy);
+ if (err < 0)
+ goto errout;
+
+ if (xdp[IFLA_XDP_ATTACHED]) {
+ err = -EINVAL;
+ goto errout;
+ }
+ if (xdp[IFLA_XDP_FD]) {
+ err = dev_change_xdp_fd(dev,
+ nla_get_s32(xdp[IFLA_XDP_FD]));
+ if (err)
+ goto errout;
+ status |= DO_SETLINK_NOTIFY;
+ }
+ }
+
errout:
if (status & DO_SETLINK_MODIFIED) {
if (status & DO_SETLINK_NOTIFY)
@@ -3497,7 +3595,32 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
if (!attr)
goto nla_put_failure;
- err = ops->fill_linkxstats(skb, dev, prividx);
+ err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
+ nla_nest_end(skb, attr);
+ if (err)
+ goto nla_put_failure;
+ *idxattr = 0;
+ }
+ }
+
+ if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
+ *idxattr)) {
+ const struct rtnl_link_ops *ops = NULL;
+ const struct net_device *master;
+
+ master = netdev_master_upper_dev_get(dev);
+ if (master)
+ ops = master->rtnl_link_ops;
+ if (ops && ops->fill_linkxstats) {
+ int err;
+
+ *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
+ attr = nla_nest_start(skb,
+ IFLA_STATS_LINK_XSTATS_SLAVE);
+ if (!attr)
+ goto nla_put_failure;
+
+ err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
nla_nest_end(skb, attr);
if (err)
goto nla_put_failure;
@@ -3533,14 +3656,35 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev,
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+ int attr = IFLA_STATS_LINK_XSTATS;
if (ops && ops->get_linkxstats_size) {
- size += nla_total_size(ops->get_linkxstats_size(dev));
+ size += nla_total_size(ops->get_linkxstats_size(dev,
+ attr));
/* for IFLA_STATS_LINK_XSTATS */
size += nla_total_size(0);
}
}
+ if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
+ struct net_device *_dev = (struct net_device *)dev;
+ const struct rtnl_link_ops *ops = NULL;
+ const struct net_device *master;
+
+ /* netdev_master_upper_dev_get can't take const */
+ master = netdev_master_upper_dev_get(_dev);
+ if (master)
+ ops = master->rtnl_link_ops;
+ if (ops && ops->get_linkxstats_size) {
+ int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
+
+ size += nla_total_size(ops->get_linkxstats_size(dev,
+ attr));
+ /* for IFLA_STATS_LINK_XSTATS_SLAVE */
+ size += nla_total_size(0);
+ }
+ }
+
return size;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.