aboutsummaryrefslogtreecommitdiff
path: root/net/core/rtnetlink.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/core/rtnetlink.c')
-rw-r--r--net/core/rtnetlink.c179
1 files changed, 99 insertions, 80 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index eb42873f2a3..33148a56819 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -38,7 +38,6 @@
#include <asm/uaccess.h>
#include <asm/system.h>
-#include <asm/string.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
@@ -53,8 +52,7 @@
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
-struct rtnl_link
-{
+struct rtnl_link {
rtnl_doit_func doit;
rtnl_dumpit_func dumpit;
};
@@ -65,6 +63,7 @@ void rtnl_lock(void)
{
mutex_lock(&rtnl_mutex);
}
+EXPORT_SYMBOL(rtnl_lock);
void __rtnl_unlock(void)
{
@@ -76,16 +75,19 @@ void rtnl_unlock(void)
/* This fellow will unlock it for us. */
netdev_run_todo();
}
+EXPORT_SYMBOL(rtnl_unlock);
int rtnl_trylock(void)
{
return mutex_trylock(&rtnl_mutex);
}
+EXPORT_SYMBOL(rtnl_trylock);
int rtnl_is_locked(void)
{
return mutex_is_locked(&rtnl_mutex);
}
+EXPORT_SYMBOL(rtnl_is_locked);
static struct rtnl_link *rtnl_msg_handlers[NPROTO];
@@ -168,7 +170,6 @@ int __rtnl_register(int protocol, int msgtype,
return 0;
}
-
EXPORT_SYMBOL_GPL(__rtnl_register);
/**
@@ -188,7 +189,6 @@ void rtnl_register(int protocol, int msgtype,
"protocol = %d, message type = %d\n",
protocol, msgtype);
}
-
EXPORT_SYMBOL_GPL(rtnl_register);
/**
@@ -213,7 +213,6 @@ int rtnl_unregister(int protocol, int msgtype)
return 0;
}
-
EXPORT_SYMBOL_GPL(rtnl_unregister);
/**
@@ -230,7 +229,6 @@ void rtnl_unregister_all(int protocol)
kfree(rtnl_msg_handlers[protocol]);
rtnl_msg_handlers[protocol] = NULL;
}
-
EXPORT_SYMBOL_GPL(rtnl_unregister_all);
static LIST_HEAD(link_ops);
@@ -248,12 +246,11 @@ static LIST_HEAD(link_ops);
int __rtnl_link_register(struct rtnl_link_ops *ops)
{
if (!ops->dellink)
- ops->dellink = unregister_netdevice;
+ ops->dellink = unregister_netdevice_queue;
list_add_tail(&ops->list, &link_ops);
return 0;
}
-
EXPORT_SYMBOL_GPL(__rtnl_link_register);
/**
@@ -271,19 +268,18 @@ int rtnl_link_register(struct rtnl_link_ops *ops)
rtnl_unlock();
return err;
}
-
EXPORT_SYMBOL_GPL(rtnl_link_register);
static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
{
struct net_device *dev;
-restart:
+ LIST_HEAD(list_kill);
+
for_each_netdev(net, dev) {
- if (dev->rtnl_link_ops == ops) {
- ops->dellink(dev);
- goto restart;
- }
+ if (dev->rtnl_link_ops == ops)
+ ops->dellink(dev, &list_kill);
}
+ unregister_netdevice_many(&list_kill);
}
void rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
@@ -309,7 +305,6 @@ void __rtnl_link_unregister(struct rtnl_link_ops *ops)
}
list_del(&ops->list);
}
-
EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
/**
@@ -322,7 +317,6 @@ void rtnl_link_unregister(struct rtnl_link_ops *ops)
__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)
@@ -427,12 +421,13 @@ void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data
struct rtattr *rta;
int size = RTA_LENGTH(attrlen);
- rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
+ rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
rta->rta_type = attrtype;
rta->rta_len = size;
memcpy(RTA_DATA(rta), data, attrlen);
memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
}
+EXPORT_SYMBOL(__rta_fill);
int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
{
@@ -454,6 +449,7 @@ int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
return nlmsg_unicast(rtnl, skb, pid);
}
+EXPORT_SYMBOL(rtnl_unicast);
void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
struct nlmsghdr *nlh, gfp_t flags)
@@ -466,6 +462,7 @@ void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
nlmsg_notify(rtnl, skb, pid, group, report, flags);
}
+EXPORT_SYMBOL(rtnl_notify);
void rtnl_set_sk_err(struct net *net, u32 group, int error)
{
@@ -473,6 +470,7 @@ void rtnl_set_sk_err(struct net *net, u32 group, int error)
netlink_set_err(rtnl, 0, group, error);
}
+EXPORT_SYMBOL(rtnl_set_sk_err);
int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
{
@@ -501,6 +499,7 @@ nla_put_failure:
nla_nest_cancel(skb, mx);
return -EMSGSIZE;
}
+EXPORT_SYMBOL(rtnetlink_put_metrics);
int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
u32 ts, u32 tsage, long expires, u32 error)
@@ -520,14 +519,13 @@ int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
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)
{
unsigned char operstate = dev->operstate;
- switch(transition) {
+ switch (transition) {
case IF_OPER_UP:
if ((operstate == IF_OPER_DORMANT ||
operstate == IF_OPER_UNKNOWN) &&
@@ -682,22 +680,33 @@ nla_put_failure:
static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
- int idx;
- int s_idx = cb->args[0];
+ int h, s_h;
+ int idx = 0, s_idx;
struct net_device *dev;
-
- idx = 0;
- for_each_netdev(net, dev) {
- if (idx < s_idx)
- 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;
+ struct hlist_head *head;
+ struct hlist_node *node;
+
+ s_h = cb->args[0];
+ s_idx = cb->args[1];
+
+ for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+ idx = 0;
+ head = &net->dev_index_head[h];
+ hlist_for_each_entry(dev, node, head, index_hlist) {
+ if (idx < s_idx)
+ goto cont;
+ if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, 0,
+ NLM_F_MULTI) <= 0)
+ goto out;
cont:
- idx++;
+ idx++;
+ }
}
- cb->args[0] = idx;
+out:
+ cb->args[1] = idx;
+ cb->args[0] = h;
return skb->len;
}
@@ -717,12 +726,27 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_NET_NS_PID] = { .type = NLA_U32 },
[IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
};
+EXPORT_SYMBOL(ifla_policy);
static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
[IFLA_INFO_KIND] = { .type = NLA_STRING },
[IFLA_INFO_DATA] = { .type = NLA_NESTED },
};
+struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
+{
+ struct net *net;
+ /* Examine the link attributes and figure out which
+ * network namespace we are talking about.
+ */
+ if (tb[IFLA_NET_NS_PID])
+ net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
+ else
+ net = get_net(src_net);
+ return net;
+}
+EXPORT_SYMBOL(rtnl_link_get_net);
+
static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
{
if (dev) {
@@ -746,8 +770,7 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
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]));
+ struct net *net = rtnl_link_get_net(dev_net(dev), tb);
if (IS_ERR(net)) {
err = PTR_ERR(net);
goto errout;
@@ -910,9 +933,9 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
err = -EINVAL;
ifm = nlmsg_data(nlh);
if (ifm->ifi_index > 0)
- dev = dev_get_by_index(net, ifm->ifi_index);
+ dev = __dev_get_by_index(net, ifm->ifi_index);
else if (tb[IFLA_IFNAME])
- dev = dev_get_by_name(net, ifname);
+ dev = __dev_get_by_name(net, ifname);
else
goto errout;
@@ -921,12 +944,11 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
goto errout;
}
- if ((err = validate_linkmsg(dev, tb)) < 0)
- goto errout_dev;
+ err = validate_linkmsg(dev, tb);
+ if (err < 0)
+ goto errout;
err = do_setlink(dev, ifm, tb, ifname, 0);
-errout_dev:
- dev_put(dev);
errout:
return err;
}
@@ -963,12 +985,12 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
if (!ops)
return -EOPNOTSUPP;
- ops->dellink(dev);
+ ops->dellink(dev, NULL);
return 0;
}
-struct net_device *rtnl_create_link(struct net *net, char *ifname,
- const struct rtnl_link_ops *ops, struct nlattr *tb[])
+struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
+ char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
{
int err;
struct net_device *dev;
@@ -976,7 +998,8 @@ struct net_device *rtnl_create_link(struct net *net, char *ifname,
unsigned int real_num_queues = 1;
if (ops->get_tx_queues) {
- err = ops->get_tx_queues(net, tb, &num_queues, &real_num_queues);
+ err = ops->get_tx_queues(src_net, tb, &num_queues,
+ &real_num_queues);
if (err)
goto err;
}
@@ -985,16 +1008,16 @@ struct net_device *rtnl_create_link(struct net *net, char *ifname,
if (!dev)
goto err;
+ dev_net_set(dev, net);
+ dev->rtnl_link_ops = ops;
dev->real_num_tx_queues = real_num_queues;
+
if (strchr(dev->name, '%')) {
err = dev_alloc_name(dev, dev->name);
if (err < 0)
goto err_free;
}
- dev_net_set(dev, net);
- dev->rtnl_link_ops = ops;
-
if (tb[IFLA_MTU])
dev->mtu = nla_get_u32(tb[IFLA_MTU]);
if (tb[IFLA_ADDRESS])
@@ -1017,6 +1040,7 @@ err_free:
err:
return ERR_PTR(err);
}
+EXPORT_SYMBOL(rtnl_create_link);
static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
@@ -1050,7 +1074,8 @@ replay:
else
dev = NULL;
- if ((err = validate_linkmsg(dev, tb)) < 0)
+ err = validate_linkmsg(dev, tb);
+ if (err < 0)
return err;
if (tb[IFLA_LINKINFO]) {
@@ -1071,6 +1096,7 @@ replay:
if (1) {
struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
+ struct net *dest_net;
if (ops) {
if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
@@ -1135,17 +1161,19 @@ replay:
if (!ifname[0])
snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
- dev = rtnl_create_link(net, ifname, ops, tb);
+ dest_net = rtnl_link_get_net(net, tb);
+ dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
if (IS_ERR(dev))
err = PTR_ERR(dev);
else if (ops->newlink)
- err = ops->newlink(dev, tb, data);
+ err = ops->newlink(net, dev, tb, data);
else
err = register_netdevice(dev);
-
if (err < 0 && !IS_ERR(dev))
free_netdev(dev);
+
+ put_net(dest_net);
return err;
}
}
@@ -1154,6 +1182,7 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
+ char ifname[IFNAMSIZ];
struct nlattr *tb[IFLA_MAX+1];
struct net_device *dev = NULL;
struct sk_buff *nskb;
@@ -1163,19 +1192,23 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
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);
- if (dev == NULL)
- return -ENODEV;
- } else
+ 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 == NULL)
+ return -ENODEV;
+
nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
- if (nskb == NULL) {
- err = -ENOBUFS;
- goto errout;
- }
+ if (nskb == NULL)
+ return -ENOBUFS;
err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
nlh->nlmsg_seq, 0, 0);
@@ -1183,11 +1216,8 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
/* -EMSGSIZE implies BUG in if_nlmsg_size */
WARN_ON(err == -EMSGSIZE);
kfree_skb(nskb);
- goto errout;
- }
- err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
-errout:
- dev_put(dev);
+ } else
+ err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
return err;
}
@@ -1199,7 +1229,7 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
if (s_idx == 0)
s_idx = 1;
- for (idx=1; idx<NPROTO; idx++) {
+ for (idx = 1; idx < NPROTO; idx++) {
int type = cb->nlh->nlmsg_type-RTM_BASE;
if (idx < s_idx || idx == PF_PACKET)
continue;
@@ -1266,7 +1296,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
return 0;
- family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
+ family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
if (family >= NPROTO)
return -EAFNOSUPPORT;
@@ -1299,7 +1329,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (nlh->nlmsg_len > min_len) {
int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
- struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
+ struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
while (RTA_OK(attr, attrlen)) {
unsigned flavor = attr->rta_type;
@@ -1405,14 +1435,3 @@ void __init rtnetlink_init(void)
rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);
}
-EXPORT_SYMBOL(__rta_fill);
-EXPORT_SYMBOL(rtnetlink_put_metrics);
-EXPORT_SYMBOL(rtnl_lock);
-EXPORT_SYMBOL(rtnl_trylock);
-EXPORT_SYMBOL(rtnl_unlock);
-EXPORT_SYMBOL(rtnl_is_locked);
-EXPORT_SYMBOL(rtnl_unicast);
-EXPORT_SYMBOL(rtnl_notify);
-EXPORT_SYMBOL(rtnl_set_sk_err);
-EXPORT_SYMBOL(rtnl_create_link);
-EXPORT_SYMBOL(ifla_policy);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 18:07:16 +0000