* Vitaly E. Lavrov RTA_OK arithmetics was wrong.
*/
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/init.h>
#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>
#include <net/udp.h>
#include <net/sock.h>
#include <net/pkt_sched.h>
-#include <net/netlink.h>
-#ifdef CONFIG_NET_WIRELESS_RTNETLINK
-#include <linux/wireless.h>
-#include <net/iw_handler.h>
-#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
+#include <net/fib_rules.h>
+#include <net/rtnetlink.h>
+
+struct rtnl_link
+{
+ rtnl_doit_func doit;
+ rtnl_dumpit_func dumpit;
+};
static DEFINE_MUTEX(rtnl_mutex);
+static struct sock *rtnl;
void rtnl_lock(void)
{
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;
}
-struct sock *rtnl;
+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)
+{
+ int msgindex = msgtype - RTM_BASE;
+
+ /*
+ * msgindex < 0 implies someone tried to register a netlink
+ * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
+ * the message type has not been added to linux/rtnetlink.h
+ */
+ BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
+
+ return msgindex;
+}
+
+static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
+{
+ struct rtnl_link *tab;
+
+ tab = rtnl_msg_handlers[protocol];
+ if (tab == NULL || tab[msgindex].doit == NULL)
+ tab = rtnl_msg_handlers[PF_UNSPEC];
+
+ return tab ? tab[msgindex].doit : NULL;
+}
+
+static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
+{
+ struct rtnl_link *tab;
+
+ tab = rtnl_msg_handlers[protocol];
+ if (tab == NULL || tab[msgindex].dumpit == NULL)
+ tab = rtnl_msg_handlers[PF_UNSPEC];
+
+ return tab ? tab[msgindex].dumpit : NULL;
+}
+
+/**
+ * __rtnl_register - Register a rtnetlink message type
+ * @protocol: Protocol family or PF_UNSPEC
+ * @msgtype: rtnetlink message type
+ * @doit: Function pointer called for each request message
+ * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
+ *
+ * Registers the specified function pointers (at least one of them has
+ * to be non-NULL) to be called whenever a request message for the
+ * specified protocol family and message type is received.
+ *
+ * The special protocol family PF_UNSPEC may be used to define fallback
+ * function pointers for the case when no entry for the specific protocol
+ * family exists.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int __rtnl_register(int protocol, int msgtype,
+ rtnl_doit_func doit, rtnl_dumpit_func dumpit)
+{
+ struct rtnl_link *tab;
+ int msgindex;
+
+ BUG_ON(protocol < 0 || protocol >= NPROTO);
+ msgindex = rtm_msgindex(msgtype);
+
+ tab = rtnl_msg_handlers[protocol];
+ if (tab == NULL) {
+ tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
+ if (tab == NULL)
+ return -ENOBUFS;
+
+ rtnl_msg_handlers[protocol] = tab;
+ }
+
+ if (doit)
+ tab[msgindex].doit = doit;
+
+ if (dumpit)
+ tab[msgindex].dumpit = dumpit;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(__rtnl_register);
+
+/**
+ * rtnl_register - Register a rtnetlink message type
+ *
+ * Identical to __rtnl_register() but panics on failure. This is useful
+ * as failure of this function is very unlikely, it can only happen due
+ * to lack of memory when allocating the chain to store all message
+ * handlers for a protocol. Meant for use in init functions where lack
+ * of memory implies no sense in continueing.
+ */
+void rtnl_register(int protocol, int msgtype,
+ rtnl_doit_func doit, rtnl_dumpit_func dumpit)
+{
+ if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0)
+ panic("Unable to register rtnetlink message handler, "
+ "protocol = %d, message type = %d\n",
+ protocol, msgtype);
+}
+
+EXPORT_SYMBOL_GPL(rtnl_register);
+
+/**
+ * rtnl_unregister - Unregister a rtnetlink message type
+ * @protocol: Protocol family or PF_UNSPEC
+ * @msgtype: rtnetlink message type
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int rtnl_unregister(int protocol, int msgtype)
+{
+ int msgindex;
+
+ BUG_ON(protocol < 0 || protocol >= NPROTO);
+ msgindex = rtm_msgindex(msgtype);
+
+ if (rtnl_msg_handlers[protocol] == NULL)
+ return -ENOENT;
+
+ rtnl_msg_handlers[protocol][msgindex].doit = NULL;
+ rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(rtnl_unregister);
+
+/**
+ * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
+ * @protocol : Protocol family or PF_UNSPEC
+ *
+ * Identical to calling rtnl_unregster() for all registered message types
+ * of a certain protocol family.
+ */
+void rtnl_unregister_all(int protocol)
+{
+ BUG_ON(protocol < 0 || protocol >= NPROTO);
+
+ kfree(rtnl_msg_handlers[protocol]);
+ rtnl_msg_handlers[protocol] = NULL;
+}
+
+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);
-struct rtnetlink_link * rtnetlink_links[NPROTO];
+/**
+ * __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) {
+ for_each_netdev_safe(net, dev, n) {
+ if (dev->rtnl_link_ops == ops)
+ ops->dellink(dev);
+ }
+ }
+ 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)),
[RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
[RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
- [RTM_FAM(RTM_NEWNEIGH)] = NLMSG_LENGTH(sizeof(struct ndmsg)),
- [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
+ [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
[RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
[RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
[RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
[RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
- [RTM_FAM(RTM_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
[RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
[RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
- [RTM_FAM(RTM_NEWNEIGHTBL)] = NLMSG_LENGTH(sizeof(struct ndtmsg)),
};
static const int rta_max[RTM_NR_FAMILIES] =
[RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
[RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
[RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
- [RTM_FAM(RTM_NEWNEIGH)] = NDA_MAX,
- [RTM_FAM(RTM_NEWRULE)] = RTA_MAX,
+ [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
[RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
[RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
[RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
[RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
- [RTM_FAM(RTM_NEWNEIGHTBL)] = NDTA_MAX,
};
void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
return err;
}
+int rtnl_unicast(struct sk_buff *skb, u32 pid)
+{
+ return nlmsg_unicast(rtnl, skb, pid);
+}
+
+int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
+ struct nlmsghdr *nlh, gfp_t flags)
+{
+ int report = 0;
+
+ if (nlh)
+ report = nlmsg_report(nlh);
+
+ return nlmsg_notify(rtnl, skb, pid, group, report, flags);
+}
+
+void rtnl_set_sk_err(u32 group, int error)
+{
+ netlink_set_err(rtnl, 0, group, error);
+}
+
int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
{
- struct rtattr *mx = (struct rtattr*)skb->tail;
- int i;
+ struct nlattr *mx;
+ int i, valid = 0;
+
+ mx = nla_nest_start(skb, RTA_METRICS);
+ if (mx == NULL)
+ return -ENOBUFS;
+
+ for (i = 0; i < RTAX_MAX; i++) {
+ if (metrics[i]) {
+ valid++;
+ NLA_PUT_U32(skb, i+1, metrics[i]);
+ }
+ }
- RTA_PUT(skb, RTA_METRICS, 0, NULL);
- for (i=0; i<RTAX_MAX; i++) {
- if (metrics[i])
- RTA_PUT(skb, i+1, sizeof(u32), metrics+i);
+ if (!valid) {
+ nla_nest_cancel(skb, mx);
+ return 0;
}
- mx->rta_len = skb->tail - (u8*)mx;
- if (mx->rta_len == RTA_LENGTH(0))
- skb_trim(skb, (u8*)mx - skb->data);
- return 0;
-rtattr_failure:
- skb_trim(skb, (u8*)mx - skb->data);
- return -1;
+ return nla_nest_end(skb, mx);
+
+nla_put_failure:
+ return nla_nest_cancel(skb, mx);
}
+int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
+ u32 ts, u32 tsage, long expires, u32 error)
+{
+ struct rta_cacheinfo ci = {
+ .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
+ .rta_used = dst->__use,
+ .rta_clntref = atomic_read(&(dst->__refcnt)),
+ .rta_error = error,
+ .rta_id = id,
+ .rta_ts = ts,
+ .rta_tsage = tsage,
+ };
+
+ if (expires)
+ ci.rta_expires = jiffies_to_clock_t(expires);
+
+ return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+}
+
+EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
static void set_operstate(struct net_device *dev, unsigned char transition)
{
operstate == IF_OPER_UNKNOWN)
operstate = IF_OPER_DORMANT;
break;
- };
+ }
if (dev->operstate != operstate) {
write_lock_bh(&dev_base_lock);
}
}
-static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
- int type, u32 pid, u32 seq, u32 change,
- unsigned int flags)
+static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
+ struct net_device_stats *b)
{
- struct ifinfomsg *r;
- struct nlmsghdr *nlh;
- unsigned char *b = skb->tail;
-
- nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags);
- r = NLMSG_DATA(nlh);
- r->ifi_family = AF_UNSPEC;
- r->__ifi_pad = 0;
- r->ifi_type = dev->type;
- r->ifi_index = dev->ifindex;
- r->ifi_flags = dev_get_flags(dev);
- r->ifi_change = change;
-
- RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
+ a->rx_packets = b->rx_packets;
+ a->tx_packets = b->tx_packets;
+ a->rx_bytes = b->rx_bytes;
+ a->tx_bytes = b->tx_bytes;
+ a->rx_errors = b->rx_errors;
+ a->tx_errors = b->tx_errors;
+ a->rx_dropped = b->rx_dropped;
+ a->tx_dropped = b->tx_dropped;
+
+ a->multicast = b->multicast;
+ a->collisions = b->collisions;
+
+ a->rx_length_errors = b->rx_length_errors;
+ a->rx_over_errors = b->rx_over_errors;
+ a->rx_crc_errors = b->rx_crc_errors;
+ a->rx_frame_errors = b->rx_frame_errors;
+ a->rx_fifo_errors = b->rx_fifo_errors;
+ a->rx_missed_errors = b->rx_missed_errors;
+
+ a->tx_aborted_errors = b->tx_aborted_errors;
+ a->tx_carrier_errors = b->tx_carrier_errors;
+ a->tx_fifo_errors = b->tx_fifo_errors;
+ a->tx_heartbeat_errors = b->tx_heartbeat_errors;
+ a->tx_window_errors = b->tx_window_errors;
+
+ a->rx_compressed = b->rx_compressed;
+ a->tx_compressed = b->tx_compressed;
+};
- if (1) {
- u32 txqlen = dev->tx_queue_len;
- RTA_PUT(skb, IFLA_TXQLEN, sizeof(txqlen), &txqlen);
- }
+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(IFNAMSIZ) /* IFLA_QDISC */
+ + nla_total_size(sizeof(struct rtnl_link_ifmap))
+ + nla_total_size(sizeof(struct rtnl_link_stats))
+ + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
+ + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
+ + nla_total_size(4) /* IFLA_TXQLEN */
+ + nla_total_size(4) /* IFLA_WEIGHT */
+ + nla_total_size(4) /* IFLA_MTU */
+ + nla_total_size(4) /* IFLA_LINK */
+ + nla_total_size(4) /* IFLA_MASTER */
+ + nla_total_size(1) /* IFLA_OPERSTATE */
+ + nla_total_size(1) /* IFLA_LINKMODE */
+ + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
+}
- if (1) {
- u32 weight = dev->weight;
- RTA_PUT(skb, IFLA_WEIGHT, sizeof(weight), &weight);
- }
+static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
+ int type, u32 pid, u32 seq, u32 change,
+ unsigned int flags)
+{
+ struct ifinfomsg *ifm;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ ifm = nlmsg_data(nlh);
+ ifm->ifi_family = AF_UNSPEC;
+ ifm->__ifi_pad = 0;
+ ifm->ifi_type = dev->type;
+ ifm->ifi_index = dev->ifindex;
+ 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);
+
+ 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 (1) {
- u8 operstate = netif_running(dev)?dev->operstate:IF_OPER_DOWN;
- u8 link_mode = dev->link_mode;
- RTA_PUT(skb, IFLA_OPERSTATE, sizeof(operstate), &operstate);
- RTA_PUT(skb, IFLA_LINKMODE, sizeof(link_mode), &link_mode);
- }
+ if (dev->qdisc_sleeping)
+ NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id);
if (1) {
struct rtnl_link_ifmap map = {
.dma = dev->dma,
.port = dev->if_port,
};
- RTA_PUT(skb, IFLA_MAP, sizeof(map), &map);
+ NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
}
if (dev->addr_len) {
- RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
- RTA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
+ NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
+ NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
}
- if (1) {
- u32 mtu = dev->mtu;
- RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
- }
+ if (dev->get_stats) {
+ struct net_device_stats *stats = dev->get_stats(dev);
+ if (stats) {
+ struct nlattr *attr;
- if (dev->ifindex != dev->iflink) {
- u32 iflink = dev->iflink;
- RTA_PUT(skb, IFLA_LINK, sizeof(iflink), &iflink);
- }
+ attr = nla_reserve(skb, IFLA_STATS,
+ sizeof(struct rtnl_link_stats));
+ if (attr == NULL)
+ goto nla_put_failure;
- if (dev->qdisc_sleeping)
- RTA_PUT(skb, IFLA_QDISC,
- strlen(dev->qdisc_sleeping->ops->id) + 1,
- dev->qdisc_sleeping->ops->id);
-
- if (dev->master) {
- u32 master = dev->master->ifindex;
- RTA_PUT(skb, IFLA_MASTER, sizeof(master), &master);
+ copy_rtnl_link_stats(nla_data(attr), stats);
+ }
}
- if (dev->get_stats) {
- unsigned long *stats = (unsigned long*)dev->get_stats(dev);
- if (stats) {
- struct rtattr *a;
- __u32 *s;
- int i;
- int n = sizeof(struct rtnl_link_stats)/4;
-
- a = __RTA_PUT(skb, IFLA_STATS, n*4);
- s = RTA_DATA(a);
- for (i=0; i<n; i++)
- s[i] = stats[i];
- }
+ if (dev->rtnl_link_ops) {
+ if (rtnl_link_fill(skb, dev) < 0)
+ goto nla_put_failure;
}
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
-nlmsg_failure:
-rtattr_failure:
- skb_trim(skb, b - skb->data);
- return -1;
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
}
-static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+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;
- read_lock(&dev_base_lock);
- for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+ idx = 0;
+ for_each_netdev(net, dev) {
if (idx < s_idx)
- continue;
- if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK,
- NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, 0,
- NLM_F_MULTI) <= 0)
+ goto cont;
+ if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0)
break;
+cont:
+ idx++;
}
- read_unlock(&dev_base_lock);
cb->args[0] = idx;
return skb->len;
}
-static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
-{
- struct ifinfomsg *ifm = NLMSG_DATA(nlh);
- struct rtattr **ida = arg;
- struct net_device *dev;
- int err, send_addr_notify = 0;
-
- if (ifm->ifi_index >= 0)
- dev = dev_get_by_index(ifm->ifi_index);
- else if (ida[IFLA_IFNAME - 1]) {
- char ifname[IFNAMSIZ];
+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 },
+};
- if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
- IFNAMSIZ) >= IFNAMSIZ)
- return -EINVAL;
- dev = dev_get_by_name(ifname);
- } else
- return -EINVAL;
+static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
+ [IFLA_INFO_KIND] = { .type = NLA_STRING },
+ [IFLA_INFO_DATA] = { .type = NLA_NESTED },
+};
- if (!dev)
- return -ENODEV;
+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_pid(pid);
+ if (tsk) {
+ struct nsproxy *nsproxy;
+ nsproxy = task_nsproxy(tsk);
+ if (nsproxy)
+ net = get_net(nsproxy->net_ns);
+ }
+ rcu_read_unlock();
+ return net;
+}
- err = -EINVAL;
+static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
+ struct nlattr **tb, char *ifname, int modified)
+{
+ int send_addr_notify = 0;
+ int err;
- if (ifm->ifi_flags)
- dev_change_flags(dev, ifm->ifi_flags);
+ 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 (ida[IFLA_MAP - 1]) {
+ if (tb[IFLA_MAP]) {
struct rtnl_link_ifmap *u_map;
struct ifmap k_map;
if (!dev->set_config) {
err = -EOPNOTSUPP;
- goto out;
+ goto errout;
}
if (!netif_device_present(dev)) {
err = -ENODEV;
- goto out;
+ goto errout;
}
-
- if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map)))
- goto out;
-
- u_map = RTA_DATA(ida[IFLA_MAP - 1]);
+ u_map = nla_data(tb[IFLA_MAP]);
k_map.mem_start = (unsigned long) u_map->mem_start;
k_map.mem_end = (unsigned long) u_map->mem_end;
k_map.base_addr = (unsigned short) u_map->base_addr;
k_map.port = (unsigned char) u_map->port;
err = dev->set_config(dev, &k_map);
+ if (err < 0)
+ goto errout;
- if (err)
- goto out;
+ modified = 1;
}
- if (ida[IFLA_ADDRESS - 1]) {
+ if (tb[IFLA_ADDRESS]) {
+ struct sockaddr *sa;
+ int len;
+
if (!dev->set_mac_address) {
err = -EOPNOTSUPP;
- goto out;
+ goto errout;
}
+
if (!netif_device_present(dev)) {
err = -ENODEV;
- goto out;
+ goto errout;
}
- if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len))
- goto out;
- err = dev->set_mac_address(dev, RTA_DATA(ida[IFLA_ADDRESS - 1]));
+ len = sizeof(sa_family_t) + dev->addr_len;
+ sa = kmalloc(len, GFP_KERNEL);
+ if (!sa) {
+ err = -ENOMEM;
+ goto errout;
+ }
+ sa->sa_family = dev->type;
+ memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
+ dev->addr_len);
+ err = dev->set_mac_address(dev, sa);
+ kfree(sa);
if (err)
- goto out;
+ goto errout;
send_addr_notify = 1;
+ modified = 1;
}
- if (ida[IFLA_BROADCAST - 1]) {
- if (ida[IFLA_BROADCAST - 1]->rta_len != RTA_LENGTH(dev->addr_len))
- goto out;
- memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]),
- dev->addr_len);
- send_addr_notify = 1;
+ if (tb[IFLA_MTU]) {
+ err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
+ if (err < 0)
+ goto errout;
+ modified = 1;
}
- if (ida[IFLA_MTU - 1]) {
- if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
- goto out;
- err = dev_set_mtu(dev, *((u32 *) RTA_DATA(ida[IFLA_MTU - 1])));
-
- if (err)
- goto out;
-
+ /*
+ * Interface selected by interface index but interface
+ * name provided implies that a name change has been
+ * requested.
+ */
+ if (ifm->ifi_index > 0 && ifname[0]) {
+ err = dev_change_name(dev, ifname);
+ if (err < 0)
+ goto errout;
+ modified = 1;
}
- if (ida[IFLA_TXQLEN - 1]) {
- if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
- goto out;
-
- dev->tx_queue_len = *((u32 *) RTA_DATA(ida[IFLA_TXQLEN - 1]));
+ if (tb[IFLA_BROADCAST]) {
+ nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
+ send_addr_notify = 1;
}
- if (ida[IFLA_WEIGHT - 1]) {
- if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
- goto out;
+ if (ifm->ifi_flags || ifm->ifi_change) {
+ unsigned int flags = ifm->ifi_flags;
- dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
+ /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
+ if (ifm->ifi_change)
+ flags = (flags & ifm->ifi_change) |
+ (dev->flags & ~ifm->ifi_change);
+ dev_change_flags(dev, flags);
}
- if (ida[IFLA_OPERSTATE - 1]) {
- if (ida[IFLA_OPERSTATE - 1]->rta_len != RTA_LENGTH(sizeof(u8)))
- goto out;
+ if (tb[IFLA_TXQLEN])
+ dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
- set_operstate(dev, *((u8 *) RTA_DATA(ida[IFLA_OPERSTATE - 1])));
- }
-
- if (ida[IFLA_LINKMODE - 1]) {
- if (ida[IFLA_LINKMODE - 1]->rta_len != RTA_LENGTH(sizeof(u8)))
- goto out;
+ if (tb[IFLA_OPERSTATE])
+ set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
+ if (tb[IFLA_LINKMODE]) {
write_lock_bh(&dev_base_lock);
- dev->link_mode = *((u8 *) RTA_DATA(ida[IFLA_LINKMODE - 1]));
+ dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
write_unlock_bh(&dev_base_lock);
}
- if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
- char ifname[IFNAMSIZ];
+ err = 0;
- if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
- IFNAMSIZ) >= IFNAMSIZ)
- goto out;
- err = dev_change_name(dev, ifname);
- if (err)
- goto out;
- }
+errout:
+ if (err < 0 && modified && net_ratelimit())
+ printk(KERN_WARNING "A link change request failed with "
+ "some changes comitted 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);
+ return err;
+}
-#ifdef CONFIG_NET_WIRELESS_RTNETLINK
- if (ida[IFLA_WIRELESS - 1]) {
+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;
+ struct nlattr *tb[IFLA_MAX+1];
+ char ifname[IFNAMSIZ];
- /* Call Wireless Extensions.
- * Various stuff checked in there... */
- err = wireless_rtnetlink_set(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len);
- if (err)
- goto out;
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ if (err < 0)
+ goto errout;
+
+ if (tb[IFLA_IFNAME])
+ nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
+ else
+ ifname[0] = '\0';
+
+ err = -EINVAL;
+ 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
+ goto errout;
+
+ if (dev == NULL) {
+ err = -ENODEV;
+ goto errout;
}
-#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
- err = 0;
+ if (tb[IFLA_ADDRESS] &&
+ nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
+ goto errout_dev;
-out:
- if (send_addr_notify)
- call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
+ if (tb[IFLA_BROADCAST] &&
+ nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
+ goto errout_dev;
+ err = do_setlink(dev, ifm, tb, ifname, 0);
+errout_dev:
dev_put(dev);
+errout:
return err;
}
-#ifdef CONFIG_NET_WIRELESS_RTNETLINK
-static int do_getlink(struct sk_buff *in_skb, struct nlmsghdr* in_nlh, void *arg)
+static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
- struct ifinfomsg *ifm = NLMSG_DATA(in_nlh);
- struct rtattr **ida = arg;
+ struct net *net = skb->sk->sk_net;
+ const struct rtnl_link_ops *ops;
struct net_device *dev;
- struct ifinfomsg *r;
- struct nlmsghdr *nlh;
- int err = -ENOBUFS;
- struct sk_buff *skb;
- unsigned char *b;
- char *iw_buf = NULL;
- int iw_buf_len = 0;
+ 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);
- if (ifm->ifi_index >= 0)
- dev = dev_get_by_index(ifm->ifi_index);
+ 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;
-#ifdef CONFIG_NET_WIRELESS_RTNETLINK
- if (ida[IFLA_WIRELESS - 1]) {
+ ops = dev->rtnl_link_ops;
+ if (!ops)
+ return -EOPNOTSUPP;
- /* Call Wireless Extensions. We need to know the size before
- * we can alloc. Various stuff checked in there... */
- err = wireless_rtnetlink_get(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len, &iw_buf, &iw_buf_len);
- if (err)
- goto out;
+ 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;
}
-#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
- /* Create a skb big enough to include all the data.
- * Some requests are way bigger than 4k... Jean II */
- skb = alloc_skb((NLMSG_LENGTH(sizeof(*r))) + (RTA_SPACE(iw_buf_len)),
- GFP_KERNEL);
- if (!skb)
- goto out;
- b = skb->tail;
-
- /* Put in the message the usual good stuff */
- nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, in_nlh->nlmsg_seq,
- RTM_NEWLINK, sizeof(*r));
- r = NLMSG_DATA(nlh);
- r->ifi_family = AF_UNSPEC;
- r->__ifi_pad = 0;
- r->ifi_type = dev->type;
- r->ifi_index = dev->ifindex;
- r->ifi_flags = dev->flags;
- r->ifi_change = 0;
-
- /* Put the wireless payload if it exist */
- if(iw_buf != NULL)
- RTA_PUT(skb, IFLA_WIRELESS, iw_buf_len,
- iw_buf + IW_EV_POINT_OFF);
-
- nlh->nlmsg_len = skb->tail - b;
-
- /* Needed ? */
- NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
-
- err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
- if (err > 0)
- err = 0;
-out:
- if(iw_buf != NULL)
- kfree(iw_buf);
+ 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;
+ struct sk_buff *nskb;
+ int err;
+
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ if (err < 0)
+ return err;
+
+ ifm = nlmsg_data(nlh);
+ if (ifm->ifi_index > 0) {
+ dev = dev_get_by_index(net, ifm->ifi_index);
+ if (dev == NULL)
+ return -ENODEV;
+ } else
+ return -EINVAL;
+
+ nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
+ if (nskb == NULL) {
+ err = -ENOBUFS;
+ goto errout;
+ }
+
+ err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
+ nlh->nlmsg_seq, 0, 0);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in if_nlmsg_size */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(nskb);
+ goto errout;
+ }
+ err = rtnl_unicast(nskb, NETLINK_CB(skb).pid);
+errout:
dev_put(dev);
- return err;
-rtattr_failure:
-nlmsg_failure:
- kfree_skb(skb);
- goto out;
+ return err;
}
-#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
-static int rtnetlink_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
+static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
{
int idx;
int s_idx = cb->family;
int type = cb->nlh->nlmsg_type-RTM_BASE;
if (idx < s_idx || idx == PF_PACKET)
continue;
- if (rtnetlink_links[idx] == NULL ||
- rtnetlink_links[idx][type].dumpit == NULL)
+ if (rtnl_msg_handlers[idx] == NULL ||
+ rtnl_msg_handlers[idx][type].dumpit == NULL)
continue;
if (idx > s_idx)
memset(&cb->args[0], 0, sizeof(cb->args));
- if (rtnetlink_links[idx][type].dumpit(skb, cb))
+ if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
break;
}
cb->family = idx;
void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
{
struct sk_buff *skb;
- int size = NLMSG_SPACE(sizeof(struct ifinfomsg) +
- sizeof(struct rtnl_link_ifmap) +
- sizeof(struct rtnl_link_stats) + 128);
+ int err = -ENOBUFS;
- skb = alloc_skb(size, GFP_KERNEL);
- if (!skb)
- return;
+ skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
+ if (skb == NULL)
+ goto errout;
- if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change, 0) < 0) {
+ err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in if_nlmsg_size() */
+ WARN_ON(err == -EMSGSIZE);
kfree_skb(skb);
- return;
+ goto errout;
}
- NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
- netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL);
+ err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
+errout:
+ if (err < 0)
+ rtnl_set_sk_err(RTNLGRP_LINK, err);
}
/* Protected by RTNL sempahore. */
/* Process one rtnetlink message. */
-static __inline__ int
-rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
+static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
- struct rtnetlink_link *link;
- struct rtnetlink_link *link_tab;
+ rtnl_doit_func doit;
int sz_idx, kind;
int min_len;
int family;
int type;
int err;
- /* Only requests are handled by kernel now */
- if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
- return 0;
-
type = nlh->nlmsg_type;
-
- /* A control message: ignore them */
- if (type < RTM_BASE)
- return 0;
-
- /* Unknown message: reply with EINVAL */
if (type > RTM_MAX)
- goto err_inval;
+ return -EOPNOTSUPP;
type -= RTM_BASE;
return 0;
family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
- if (family >= NPROTO) {
- *errp = -EAFNOSUPPORT;
- return -1;
- }
-
- link_tab = rtnetlink_links[family];
- if (link_tab == NULL)
- link_tab = rtnetlink_links[PF_UNSPEC];
- link = &link_tab[type];
+ if (family >= NPROTO)
+ return -EAFNOSUPPORT;
sz_idx = type>>2;
kind = type&3;
- if (kind != 2 && security_netlink_recv(skb)) {
- *errp = -EPERM;
- return -1;
- }
+ if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
+ return -EPERM;
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
- if (link->dumpit == NULL)
- link = &(rtnetlink_links[PF_UNSPEC][type]);
+ rtnl_dumpit_func dumpit;
- if (link->dumpit == NULL)
- goto err_inval;
+ dumpit = rtnl_get_dumpit(family, type);
+ if (dumpit == NULL)
+ return -EOPNOTSUPP;
- if ((*errp = netlink_dump_start(rtnl, skb, nlh,
- link->dumpit, NULL)) != 0) {
- return -1;
- }
-
- netlink_queue_skip(nlh, skb);
- return -1;
+ __rtnl_unlock();
+ err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
+ rtnl_lock();
+ return err;
}
memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
min_len = rtm_min[sz_idx];
if (nlh->nlmsg_len < min_len)
- goto err_inval;
+ return -EINVAL;
if (nlh->nlmsg_len > min_len) {
int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
unsigned flavor = attr->rta_type;
if (flavor) {
if (flavor > rta_max[sz_idx])
- goto err_inval;
+ return -EINVAL;
rta_buf[flavor-1] = attr;
}
attr = RTA_NEXT(attr, attrlen);
}
}
- if (link->doit == NULL)
- link = &(rtnetlink_links[PF_UNSPEC][type]);
- if (link->doit == NULL)
- goto err_inval;
- err = link->doit(skb, nlh, (void *)&rta_buf[0]);
-
- *errp = err;
- return err;
+ doit = rtnl_get_doit(family, type);
+ if (doit == NULL)
+ return -EOPNOTSUPP;
-err_inval:
- *errp = -EINVAL;
- return -1;
+ 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 struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
-{
- [RTM_GETLINK - RTM_BASE] = {
-#ifdef CONFIG_NET_WIRELESS_RTNETLINK
- .doit = do_getlink,
-#endif /* CONFIG_NET_WIRELESS_RTNETLINK */
- .dumpit = rtnetlink_dump_ifinfo },
- [RTM_SETLINK - RTM_BASE] = { .doit = do_setlink },
- [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
- [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
- [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
- [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
- [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info },
- [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
- [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info },
- [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set },
-};
-
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,
- 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);
register_netdevice_notifier(&rtnetlink_dev_notifier);
- rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table;
- rtnetlink_links[PF_PACKET] = link_rtnetlink_table;
+
+ 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(rtnetlink_links);
+EXPORT_SYMBOL(__rtattr_parse_nested_compat);
EXPORT_SYMBOL(rtnetlink_put_metrics);
-EXPORT_SYMBOL(rtnl);
EXPORT_SYMBOL(rtnl_lock);
EXPORT_SYMBOL(rtnl_trylock);
EXPORT_SYMBOL(rtnl_unlock);
+EXPORT_SYMBOL(rtnl_unicast);
+EXPORT_SYMBOL(rtnl_notify);
+EXPORT_SYMBOL(rtnl_set_sk_err);
+EXPORT_SYMBOL(rtnl_create_link);
+EXPORT_SYMBOL(ifla_policy);