#include <linux/security.h>
#include <linux/mutex.h>
#include <linux/if_addr.h>
+#include <linux/nsproxy.h>
#include <asm/uaccess.h>
#include <asm/system.h>
void rtnl_unlock(void)
{
mutex_unlock(&rtnl_mutex);
- if (rtnl && rtnl->sk_receive_queue.qlen)
- rtnl->sk_data_ready(rtnl, 0);
netdev_run_todo();
}
return 0;
}
+int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr,
+ struct rtattr *rta, int len)
+{
+ if (RTA_PAYLOAD(rta) < len)
+ return -1;
+ if (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr)) {
+ rta = RTA_DATA(rta) + RTA_ALIGN(len);
+ return rtattr_parse_nested(tb, maxattr, rta);
+ }
+ memset(tb, 0, sizeof(struct rtattr *) * maxattr);
+ return 0;
+}
+
static struct rtnl_link *rtnl_msg_handlers[NPROTO];
static inline int rtm_msgindex(int msgtype)
EXPORT_SYMBOL_GPL(rtnl_unregister_all);
+static LIST_HEAD(link_ops);
+
+/**
+ * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
+ * @ops: struct rtnl_link_ops * to register
+ *
+ * The caller must hold the rtnl_mutex. This function should be used
+ * by drivers that create devices during module initialization. It
+ * must be called before registering the devices.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int __rtnl_link_register(struct rtnl_link_ops *ops)
+{
+ if (!ops->dellink)
+ ops->dellink = unregister_netdevice;
+
+ list_add_tail(&ops->list, &link_ops);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(__rtnl_link_register);
+
+/**
+ * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
+ * @ops: struct rtnl_link_ops * to register
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int rtnl_link_register(struct rtnl_link_ops *ops)
+{
+ int err;
+
+ rtnl_lock();
+ err = __rtnl_link_register(ops);
+ rtnl_unlock();
+ return err;
+}
+
+EXPORT_SYMBOL_GPL(rtnl_link_register);
+
+/**
+ * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
+ * @ops: struct rtnl_link_ops * to unregister
+ *
+ * The caller must hold the rtnl_mutex.
+ */
+void __rtnl_link_unregister(struct rtnl_link_ops *ops)
+{
+ struct net_device *dev, *n;
+ struct net *net;
+
+ for_each_net(net) {
+restart:
+ for_each_netdev_safe(net, dev, n) {
+ if (dev->rtnl_link_ops == ops) {
+ ops->dellink(dev);
+ goto restart;
+ }
+ }
+ }
+ list_del(&ops->list);
+}
+
+EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
+
+/**
+ * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
+ * @ops: struct rtnl_link_ops * to unregister
+ */
+void rtnl_link_unregister(struct rtnl_link_ops *ops)
+{
+ rtnl_lock();
+ __rtnl_link_unregister(ops);
+ rtnl_unlock();
+}
+
+EXPORT_SYMBOL_GPL(rtnl_link_unregister);
+
+static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
+{
+ const struct rtnl_link_ops *ops;
+
+ list_for_each_entry(ops, &link_ops, list) {
+ if (!strcmp(ops->kind, kind))
+ return ops;
+ }
+ return NULL;
+}
+
+static size_t rtnl_link_get_size(const struct net_device *dev)
+{
+ const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+ size_t size;
+
+ if (!ops)
+ return 0;
+
+ size = nlmsg_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
+ nlmsg_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
+
+ if (ops->get_size)
+ /* IFLA_INFO_DATA + nested data */
+ size += nlmsg_total_size(sizeof(struct nlattr)) +
+ ops->get_size(dev);
+
+ if (ops->get_xstats_size)
+ size += ops->get_xstats_size(dev); /* IFLA_INFO_XSTATS */
+
+ return size;
+}
+
+static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
+{
+ const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
+ struct nlattr *linkinfo, *data;
+ int err = -EMSGSIZE;
+
+ linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
+ if (linkinfo == NULL)
+ goto out;
+
+ if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
+ goto err_cancel_link;
+ if (ops->fill_xstats) {
+ err = ops->fill_xstats(skb, dev);
+ if (err < 0)
+ goto err_cancel_link;
+ }
+ if (ops->fill_info) {
+ data = nla_nest_start(skb, IFLA_INFO_DATA);
+ if (data == NULL)
+ goto err_cancel_link;
+ err = ops->fill_info(skb, dev);
+ if (err < 0)
+ goto err_cancel_data;
+ nla_nest_end(skb, data);
+ }
+
+ nla_nest_end(skb, linkinfo);
+ return 0;
+
+err_cancel_data:
+ nla_nest_cancel(skb, data);
+err_cancel_link:
+ nla_nest_cancel(skb, linkinfo);
+out:
+ return err;
+}
+
static const int rtm_min[RTM_NR_FAMILIES] =
{
[RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
a->tx_compressed = b->tx_compressed;
};
-static inline size_t if_nlmsg_size(void)
+static inline size_t if_nlmsg_size(const struct net_device *dev)
{
return NLMSG_ALIGN(sizeof(struct ifinfomsg))
+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
+ nla_total_size(4) /* IFLA_LINK */
+ nla_total_size(4) /* IFLA_MASTER */
+ nla_total_size(1) /* IFLA_OPERSTATE */
- + nla_total_size(1); /* IFLA_LINKMODE */
+ + nla_total_size(1) /* IFLA_LINKMODE */
+ + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
}
static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
- NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight);
NLA_PUT_U8(skb, IFLA_OPERSTATE,
netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
}
}
+ if (dev->rtnl_link_ops) {
+ if (rtnl_link_fill(skb, dev) < 0)
+ goto nla_put_failure;
+ }
+
return nlmsg_end(skb, nlh);
nla_put_failure:
static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct net *net = skb->sk->sk_net;
int idx;
int s_idx = cb->args[0];
struct net_device *dev;
idx = 0;
- for_each_netdev(dev) {
+ for_each_netdev(net, dev) {
if (idx < s_idx)
goto cont;
if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
return skb->len;
}
-static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
+const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
+ [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
+ [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
[IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
[IFLA_MTU] = { .type = NLA_U32 },
[IFLA_TXQLEN] = { .type = NLA_U32 },
[IFLA_WEIGHT] = { .type = NLA_U32 },
[IFLA_OPERSTATE] = { .type = NLA_U8 },
[IFLA_LINKMODE] = { .type = NLA_U8 },
+ [IFLA_NET_NS_PID] = { .type = NLA_U32 },
+};
+
+static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
+ [IFLA_INFO_KIND] = { .type = NLA_STRING },
+ [IFLA_INFO_DATA] = { .type = NLA_NESTED },
};
+static struct net *get_net_ns_by_pid(pid_t pid)
+{
+ struct task_struct *tsk;
+ struct net *net;
+
+ /* Lookup the network namespace */
+ net = ERR_PTR(-ESRCH);
+ rcu_read_lock();
+ tsk = find_task_by_vpid(pid);
+ if (tsk) {
+ struct nsproxy *nsproxy;
+ nsproxy = task_nsproxy(tsk);
+ if (nsproxy)
+ net = get_net(nsproxy->net_ns);
+ }
+ rcu_read_unlock();
+ return net;
+}
+
static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
- struct nlattr **tb, char *ifname)
+ struct nlattr **tb, char *ifname, int modified)
{
- int modified = 0, send_addr_notify = 0;
+ int send_addr_notify = 0;
int err;
+ if (tb[IFLA_NET_NS_PID]) {
+ struct net *net;
+ net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
+ if (IS_ERR(net)) {
+ err = PTR_ERR(net);
+ goto errout;
+ }
+ err = dev_change_net_namespace(dev, net, ifname);
+ put_net(net);
+ if (err)
+ goto errout;
+ modified = 1;
+ }
+
if (tb[IFLA_MAP]) {
struct rtnl_link_ifmap *u_map;
struct ifmap k_map;
if (tb[IFLA_TXQLEN])
dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
- if (tb[IFLA_WEIGHT])
- dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
-
if (tb[IFLA_OPERSTATE])
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
+ struct net *net = skb->sk->sk_net;
struct ifinfomsg *ifm;
struct net_device *dev;
int err;
err = -EINVAL;
ifm = nlmsg_data(nlh);
if (ifm->ifi_index > 0)
- dev = dev_get_by_index(ifm->ifi_index);
+ dev = dev_get_by_index(net, ifm->ifi_index);
else if (tb[IFLA_IFNAME])
- dev = dev_get_by_name(ifname);
+ dev = dev_get_by_name(net, ifname);
else
goto errout;
nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
goto errout_dev;
- err = do_setlink(dev, ifm, tb, ifname);
+ err = do_setlink(dev, ifm, tb, ifname, 0);
errout_dev:
dev_put(dev);
errout:
return err;
}
+static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = skb->sk->sk_net;
+ const struct rtnl_link_ops *ops;
+ struct net_device *dev;
+ struct ifinfomsg *ifm;
+ char ifname[IFNAMSIZ];
+ struct nlattr *tb[IFLA_MAX+1];
+ int err;
+
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ if (err < 0)
+ return err;
+
+ if (tb[IFLA_IFNAME])
+ nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
+
+ 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
+ return -EINVAL;
+
+ if (!dev)
+ return -ENODEV;
+
+ ops = dev->rtnl_link_ops;
+ if (!ops)
+ return -EOPNOTSUPP;
+
+ ops->dellink(dev);
+ return 0;
+}
+
+struct net_device *rtnl_create_link(struct net *net, char *ifname,
+ const struct rtnl_link_ops *ops, struct nlattr *tb[])
+{
+ int err;
+ struct net_device *dev;
+
+ err = -ENOMEM;
+ dev = alloc_netdev(ops->priv_size, ifname, ops->setup);
+ if (!dev)
+ goto err;
+
+ if (strchr(dev->name, '%')) {
+ err = dev_alloc_name(dev, dev->name);
+ if (err < 0)
+ goto err_free;
+ }
+
+ dev->nd_net = net;
+ dev->rtnl_link_ops = ops;
+
+ if (tb[IFLA_MTU])
+ dev->mtu = nla_get_u32(tb[IFLA_MTU]);
+ if (tb[IFLA_ADDRESS])
+ memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
+ nla_len(tb[IFLA_ADDRESS]));
+ if (tb[IFLA_BROADCAST])
+ memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
+ nla_len(tb[IFLA_BROADCAST]));
+ if (tb[IFLA_TXQLEN])
+ dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
+ if (tb[IFLA_OPERSTATE])
+ set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
+ if (tb[IFLA_LINKMODE])
+ dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
+
+ return dev;
+
+err_free:
+ free_netdev(dev);
+err:
+ return ERR_PTR(err);
+}
+
+static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = skb->sk->sk_net;
+ const struct rtnl_link_ops *ops;
+ struct net_device *dev;
+ struct ifinfomsg *ifm;
+ char kind[MODULE_NAME_LEN];
+ char ifname[IFNAMSIZ];
+ struct nlattr *tb[IFLA_MAX+1];
+ struct nlattr *linkinfo[IFLA_INFO_MAX+1];
+ int err;
+
+#ifdef CONFIG_KMOD
+replay:
+#endif
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ if (err < 0)
+ return err;
+
+ if (tb[IFLA_IFNAME])
+ nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
+ else
+ ifname[0] = '\0';
+
+ 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;
+
+ if (tb[IFLA_LINKINFO]) {
+ err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
+ tb[IFLA_LINKINFO], ifla_info_policy);
+ if (err < 0)
+ return err;
+ } else
+ memset(linkinfo, 0, sizeof(linkinfo));
+
+ if (linkinfo[IFLA_INFO_KIND]) {
+ nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
+ ops = rtnl_link_ops_get(kind);
+ } else {
+ kind[0] = '\0';
+ ops = NULL;
+ }
+
+ if (1) {
+ struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
+
+ if (ops) {
+ if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
+ err = nla_parse_nested(attr, ops->maxtype,
+ linkinfo[IFLA_INFO_DATA],
+ ops->policy);
+ if (err < 0)
+ return err;
+ data = attr;
+ }
+ if (ops->validate) {
+ err = ops->validate(tb, data);
+ if (err < 0)
+ return err;
+ }
+ }
+
+ if (dev) {
+ int modified = 0;
+
+ if (nlh->nlmsg_flags & NLM_F_EXCL)
+ return -EEXIST;
+ if (nlh->nlmsg_flags & NLM_F_REPLACE)
+ return -EOPNOTSUPP;
+
+ if (linkinfo[IFLA_INFO_DATA]) {
+ if (!ops || ops != dev->rtnl_link_ops ||
+ !ops->changelink)
+ return -EOPNOTSUPP;
+
+ err = ops->changelink(dev, tb, data);
+ if (err < 0)
+ return err;
+ modified = 1;
+ }
+
+ return do_setlink(dev, ifm, tb, ifname, modified);
+ }
+
+ if (!(nlh->nlmsg_flags & NLM_F_CREATE))
+ return -ENODEV;
+
+ if (ifm->ifi_index || ifm->ifi_flags || ifm->ifi_change)
+ return -EOPNOTSUPP;
+ if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
+ return -EOPNOTSUPP;
+
+ if (!ops) {
+#ifdef CONFIG_KMOD
+ if (kind[0]) {
+ __rtnl_unlock();
+ request_module("rtnl-link-%s", kind);
+ rtnl_lock();
+ ops = rtnl_link_ops_get(kind);
+ if (ops)
+ goto replay;
+ }
+#endif
+ return -EOPNOTSUPP;
+ }
+
+ if (!ifname[0])
+ snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
+
+ dev = rtnl_create_link(net, ifname, ops, tb);
+
+ if (IS_ERR(dev))
+ err = PTR_ERR(dev);
+ else if (ops->newlink)
+ err = ops->newlink(dev, tb, data);
+ else
+ err = register_netdevice(dev);
+
+ if (err < 0 && !IS_ERR(dev))
+ free_netdev(dev);
+ return err;
+ }
+}
+
static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
+ struct net *net = skb->sk->sk_net;
struct ifinfomsg *ifm;
struct nlattr *tb[IFLA_MAX+1];
struct net_device *dev = NULL;
ifm = nlmsg_data(nlh);
if (ifm->ifi_index > 0) {
- dev = dev_get_by_index(ifm->ifi_index);
+ dev = dev_get_by_index(net, ifm->ifi_index);
if (dev == NULL)
return -ENODEV;
} else
return -EINVAL;
- nskb = nlmsg_new(if_nlmsg_size(), GFP_KERNEL);
+ nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
if (nskb == NULL) {
err = -ENOBUFS;
goto errout;
struct sk_buff *skb;
int err = -ENOBUFS;
- skb = nlmsg_new(if_nlmsg_size(), GFP_KERNEL);
+ skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
if (skb == NULL)
goto errout;
return doit(skb, nlh, (void *)&rta_buf[0]);
}
-static void rtnetlink_rcv(struct sock *sk, int len)
+static void rtnetlink_rcv(struct sk_buff *skb)
{
- unsigned int qlen = 0;
-
- do {
- mutex_lock(&rtnl_mutex);
- netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
- mutex_unlock(&rtnl_mutex);
-
- netdev_run_todo();
- } while (qlen);
+ rtnl_lock();
+ netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
+ rtnl_unlock();
}
static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
+
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
switch (event) {
case NETDEV_UNREGISTER:
rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
if (!rta_buf)
panic("rtnetlink_init: cannot allocate rta_buf\n");
- rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
- &rtnl_mutex, THIS_MODULE);
+ rtnl = netlink_kernel_create(&init_net, NETLINK_ROUTE, RTNLGRP_MAX,
+ rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
if (rtnl == NULL)
panic("rtnetlink_init: cannot initialize rtnetlink\n");
netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
+ rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL);
+ rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL);
rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all);
rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);
EXPORT_SYMBOL(__rta_fill);
EXPORT_SYMBOL(rtattr_strlcpy);
EXPORT_SYMBOL(rtattr_parse);
+EXPORT_SYMBOL(__rtattr_parse_nested_compat);
EXPORT_SYMBOL(rtnetlink_put_metrics);
EXPORT_SYMBOL(rtnl_lock);
EXPORT_SYMBOL(rtnl_trylock);
EXPORT_SYMBOL(rtnl_unicast);
EXPORT_SYMBOL(rtnl_notify);
EXPORT_SYMBOL(rtnl_set_sk_err);
+EXPORT_SYMBOL(rtnl_create_link);
+EXPORT_SYMBOL(ifla_policy);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff