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-rw-r--r--net/core/rtnetlink.c359
1 files changed, 315 insertions, 44 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 90430b776ec..21318d15bbc 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -35,7 +35,9 @@
#include <linux/security.h>
#include <linux/mutex.h>
#include <linux/if_addr.h>
+#include <linux/if_bridge.h>
#include <linux/pci.h>
+#include <linux/etherdevice.h>
#include <asm/uaccess.h>
@@ -552,7 +554,7 @@ void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data
}
EXPORT_SYMBOL(__rta_fill);
-int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
+int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
{
struct sock *rtnl = net->rtnl;
int err = 0;
@@ -607,7 +609,8 @@ int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
for (i = 0; i < RTAX_MAX; i++) {
if (metrics[i]) {
valid++;
- NLA_PUT_U32(skb, i+1, metrics[i]);
+ if (nla_put_u32(skb, i+1, metrics[i]))
+ goto nla_put_failure;
}
}
@@ -782,6 +785,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
+ nla_total_size(4) /* IFLA_MTU */
+ nla_total_size(4) /* IFLA_LINK */
+ nla_total_size(4) /* IFLA_MASTER */
+ + nla_total_size(4) /* IFLA_PROMISCUITY */
+ nla_total_size(1) /* IFLA_OPERSTATE */
+ nla_total_size(1) /* IFLA_LINKMODE */
+ nla_total_size(ext_filter_mask
@@ -807,7 +811,8 @@ static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
vf_port = nla_nest_start(skb, IFLA_VF_PORT);
if (!vf_port)
goto nla_put_failure;
- NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
+ if (nla_put_u32(skb, IFLA_PORT_VF, vf))
+ goto nla_put_failure;
err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
if (err == -EMSGSIZE)
goto nla_put_failure;
@@ -891,25 +896,23 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
ifm->ifi_flags = dev_get_flags(dev);
ifm->ifi_change = change;
- NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
- NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
- NLA_PUT_U8(skb, IFLA_OPERSTATE,
- netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
- NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
- NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
- NLA_PUT_U32(skb, IFLA_GROUP, dev->group);
-
- if (dev->ifindex != dev->iflink)
- NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
-
- if (dev->master)
- NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
-
- if (dev->qdisc)
- NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
-
- if (dev->ifalias)
- NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
+ if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
+ nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
+ nla_put_u8(skb, IFLA_OPERSTATE,
+ netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
+ nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
+ nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
+ nla_put_u32(skb, IFLA_GROUP, dev->group) ||
+ nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
+ (dev->ifindex != dev->iflink &&
+ nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
+ (dev->master &&
+ nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
+ (dev->qdisc &&
+ nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
+ (dev->ifalias &&
+ nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
+ goto nla_put_failure;
if (1) {
struct rtnl_link_ifmap map = {
@@ -920,12 +923,14 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
.dma = dev->dma,
.port = dev->if_port,
};
- NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
+ if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
+ goto nla_put_failure;
}
if (dev->addr_len) {
- NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
- NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
+ if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
+ nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
+ goto nla_put_failure;
}
attr = nla_reserve(skb, IFLA_STATS,
@@ -942,8 +947,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
goto nla_put_failure;
copy_rtnl_link_stats64(nla_data(attr), stats);
- if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF))
- NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
+ if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
+ nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
+ goto nla_put_failure;
if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
&& (ext_filter_mask & RTEXT_FILTER_VF)) {
@@ -986,12 +992,13 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
nla_nest_cancel(skb, vfinfo);
goto nla_put_failure;
}
- NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
- NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
- NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
- &vf_tx_rate);
- NLA_PUT(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
- &vf_spoofchk);
+ if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
+ nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
+ nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
+ &vf_tx_rate) ||
+ nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
+ &vf_spoofchk))
+ goto nla_put_failure;
nla_nest_end(skb, vf);
}
nla_nest_end(skb, vfinfo);
@@ -1113,6 +1120,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_PORT_SELF] = { .type = NLA_NESTED },
[IFLA_AF_SPEC] = { .type = NLA_NESTED },
[IFLA_EXT_MASK] = { .type = NLA_U32 },
+ [IFLA_PROMISCUITY] = { .type = NLA_U32 },
};
EXPORT_SYMBOL(ifla_policy);
@@ -1516,11 +1524,9 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
err = 0;
errout:
- if (err < 0 && modified && net_ratelimit())
- printk(KERN_WARNING "A link change request failed with "
- "some changes committed already. Interface %s may "
- "have been left with an inconsistent configuration, "
- "please check.\n", dev->name);
+ if (err < 0 && modified)
+ net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
+ dev->name);
if (send_addr_notify)
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
@@ -1634,14 +1640,14 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
int err;
struct net_device *dev;
unsigned int num_queues = 1;
- unsigned int real_num_queues = 1;
if (ops->get_tx_queues) {
- err = ops->get_tx_queues(src_net, tb, &num_queues,
- &real_num_queues);
- if (err)
+ err = ops->get_tx_queues(src_net, tb);
+ if (err < 0)
goto err;
+ num_queues = err;
}
+
err = -ENOMEM;
dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
if (!dev)
@@ -1947,7 +1953,7 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
return skb->len;
}
-void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
+void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
{
struct net *net = dev_net(dev);
struct sk_buff *skb;
@@ -1972,6 +1978,267 @@ errout:
rtnl_set_sk_err(net, RTNLGRP_LINK, err);
}
+static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
+ struct net_device *dev,
+ u8 *addr, u32 pid, u32 seq,
+ int type, unsigned int flags)
+{
+ struct nlmsghdr *nlh;
+ struct ndmsg *ndm;
+
+ nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ ndm = nlmsg_data(nlh);
+ ndm->ndm_family = AF_BRIDGE;
+ ndm->ndm_pad1 = 0;
+ ndm->ndm_pad2 = 0;
+ ndm->ndm_flags = flags;
+ ndm->ndm_type = 0;
+ ndm->ndm_ifindex = dev->ifindex;
+ ndm->ndm_state = NUD_PERMANENT;
+
+ if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
+ goto nla_put_failure;
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static inline size_t rtnl_fdb_nlmsg_size(void)
+{
+ return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
+}
+
+static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
+{
+ struct net *net = dev_net(dev);
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+
+ skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
+ if (!skb)
+ goto errout;
+
+ err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
+ if (err < 0) {
+ kfree_skb(skb);
+ goto errout;
+ }
+
+ rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
+ return;
+errout:
+ rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
+}
+
+static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = sock_net(skb->sk);
+ struct net_device *master = NULL;
+ struct ndmsg *ndm;
+ struct nlattr *tb[NDA_MAX+1];
+ struct net_device *dev;
+ u8 *addr;
+ int err;
+
+ err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
+ if (err < 0)
+ return err;
+
+ ndm = nlmsg_data(nlh);
+ if (ndm->ndm_ifindex == 0) {
+ pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
+ return -EINVAL;
+ }
+
+ dev = __dev_get_by_index(net, ndm->ndm_ifindex);
+ if (dev == NULL) {
+ pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
+ return -ENODEV;
+ }
+
+ if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
+ pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
+ return -EINVAL;
+ }
+
+ addr = nla_data(tb[NDA_LLADDR]);
+ if (!is_valid_ether_addr(addr)) {
+ pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
+ return -EINVAL;
+ }
+
+ err = -EOPNOTSUPP;
+
+ /* Support fdb on master device the net/bridge default case */
+ if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
+ (dev->priv_flags & IFF_BRIDGE_PORT)) {
+ master = dev->master;
+ err = master->netdev_ops->ndo_fdb_add(ndm, dev, addr,
+ nlh->nlmsg_flags);
+ if (err)
+ goto out;
+ else
+ ndm->ndm_flags &= ~NTF_MASTER;
+ }
+
+ /* Embedded bridge, macvlan, and any other device support */
+ if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
+ err = dev->netdev_ops->ndo_fdb_add(ndm, dev, addr,
+ nlh->nlmsg_flags);
+
+ if (!err) {
+ rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
+ ndm->ndm_flags &= ~NTF_SELF;
+ }
+ }
+out:
+ return err;
+}
+
+static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = sock_net(skb->sk);
+ struct ndmsg *ndm;
+ struct nlattr *llattr;
+ struct net_device *dev;
+ int err = -EINVAL;
+ __u8 *addr;
+
+ if (nlmsg_len(nlh) < sizeof(*ndm))
+ return -EINVAL;
+
+ ndm = nlmsg_data(nlh);
+ if (ndm->ndm_ifindex == 0) {
+ pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
+ return -EINVAL;
+ }
+
+ dev = __dev_get_by_index(net, ndm->ndm_ifindex);
+ if (dev == NULL) {
+ pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
+ return -ENODEV;
+ }
+
+ llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
+ if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
+ pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
+ return -EINVAL;
+ }
+
+ addr = nla_data(llattr);
+ err = -EOPNOTSUPP;
+
+ /* Support fdb on master device the net/bridge default case */
+ if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
+ (dev->priv_flags & IFF_BRIDGE_PORT)) {
+ struct net_device *master = dev->master;
+
+ if (master->netdev_ops->ndo_fdb_del)
+ err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
+
+ if (err)
+ goto out;
+ else
+ ndm->ndm_flags &= ~NTF_MASTER;
+ }
+
+ /* Embedded bridge, macvlan, and any other device support */
+ if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
+ err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
+
+ if (!err) {
+ rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
+ ndm->ndm_flags &= ~NTF_SELF;
+ }
+ }
+out:
+ return err;
+}
+
+static int nlmsg_populate_fdb(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct net_device *dev,
+ int *idx,
+ struct netdev_hw_addr_list *list)
+{
+ struct netdev_hw_addr *ha;
+ int err;
+ u32 pid, seq;
+
+ pid = NETLINK_CB(cb->skb).pid;
+ seq = cb->nlh->nlmsg_seq;
+
+ list_for_each_entry(ha, &list->list, list) {
+ if (*idx < cb->args[0])
+ goto skip;
+
+ err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
+ pid, seq, 0, NTF_SELF);
+ if (err < 0)
+ return err;
+skip:
+ *idx += 1;
+ }
+ return 0;
+}
+
+/**
+ * ndo_dflt_fdb_dump: default netdevice operation to dump an FDB table.
+ * @nlh: netlink message header
+ * @dev: netdevice
+ *
+ * Default netdevice operation to dump the existing unicast address list.
+ * Returns zero on success.
+ */
+int ndo_dflt_fdb_dump(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct net_device *dev,
+ int idx)
+{
+ int err;
+
+ netif_addr_lock_bh(dev);
+ err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
+ if (err)
+ goto out;
+ nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
+out:
+ netif_addr_unlock_bh(dev);
+ return idx;
+}
+EXPORT_SYMBOL(ndo_dflt_fdb_dump);
+
+static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int idx = 0;
+ struct net *net = sock_net(skb->sk);
+ struct net_device *dev;
+
+ rcu_read_lock();
+ for_each_netdev_rcu(net, dev) {
+ if (dev->priv_flags & IFF_BRIDGE_PORT) {
+ struct net_device *master = dev->master;
+ const struct net_device_ops *ops = master->netdev_ops;
+
+ if (ops->ndo_fdb_dump)
+ idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
+ }
+
+ if (dev->netdev_ops->ndo_fdb_dump)
+ idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
+ }
+ rcu_read_unlock();
+
+ cb->args[0] = idx;
+ return skb->len;
+}
+
/* Protected by RTNL sempahore. */
static struct rtattr **rta_buf;
static int rtattr_max;
@@ -2042,7 +2309,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
while (RTA_OK(attr, attrlen)) {
- unsigned flavor = attr->rta_type;
+ unsigned int flavor = attr->rta_type;
if (flavor) {
if (flavor > rta_max[sz_idx])
return -EINVAL;
@@ -2144,5 +2411,9 @@ void __init rtnetlink_init(void)
rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
+
+ rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
+ rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
+ rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 22:49:01 +0000