#include <linux/types.h>
#include <linux/socket.h>
#include <linux/kernel.h>
-#include <linux/major.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <net/udp.h>
#include <net/sock.h>
#include <net/pkt_sched.h>
+#include <net/netlink.h>
DECLARE_MUTEX(rtnl_sem);
void rtnl_lock(void)
{
rtnl_shlock();
- rtnl_exlock();
+}
+
+int rtnl_lock_interruptible(void)
+{
+ return down_interruptible(&rtnl_sem);
}
void rtnl_unlock(void)
{
- rtnl_exunlock();
rtnl_shunlock();
netdev_run_todo();
struct rtnetlink_link * rtnetlink_links[NPROTO];
-static const int rtm_min[(RTM_MAX+1-RTM_BASE)/4] =
+static const int rtm_min[RTM_NR_FAMILIES] =
{
- NLMSG_LENGTH(sizeof(struct ifinfomsg)),
- NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
- NLMSG_LENGTH(sizeof(struct rtmsg)),
- NLMSG_LENGTH(sizeof(struct ndmsg)),
- NLMSG_LENGTH(sizeof(struct rtmsg)),
- NLMSG_LENGTH(sizeof(struct tcmsg)),
- NLMSG_LENGTH(sizeof(struct tcmsg)),
- NLMSG_LENGTH(sizeof(struct tcmsg))
+ [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_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_MAX+1-RTM_BASE)/4] =
+static const int rta_max[RTM_NR_FAMILIES] =
{
- IFLA_MAX,
- IFA_MAX,
- RTA_MAX,
- NDA_MAX,
- RTA_MAX,
- TCA_MAX,
- TCA_MAX,
- TCA_MAX
+ [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_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)
rta->rta_type = attrtype;
rta->rta_len = size;
memcpy(RTA_DATA(rta), data, attrlen);
+ memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
+}
+
+size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
+{
+ size_t ret = RTA_PAYLOAD(rta);
+ char *src = RTA_DATA(rta);
+
+ if (ret > 0 && src[ret - 1] == '\0')
+ ret--;
+ if (size > 0) {
+ size_t len = (ret >= size) ? size - 1 : ret;
+ memset(dest, 0, size);
+ memcpy(dest, src, len);
+ }
+ return ret;
}
int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
{
int err = 0;
- NETLINK_CB(skb).dst_groups = group;
+ NETLINK_CB(skb).dst_group = group;
if (echo)
atomic_inc(&skb->users);
netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
- int type, u32 pid, u32 seq, u32 change)
+ int type, u32 pid, u32 seq, u32 change,
+ unsigned int flags)
{
struct ifinfomsg *r;
struct nlmsghdr *nlh;
unsigned char *b = skb->tail;
- nlh = NLMSG_PUT(skb, pid, seq, type, sizeof(*r));
- if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ 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->flags;
+ r->ifi_flags = dev_get_flags(dev);
r->ifi_change = change;
- if (!netif_running(dev) || !netif_carrier_ok(dev))
- r->ifi_flags &= ~IFF_RUNNING;
- else
- r->ifi_flags |= IFF_RUNNING;
-
RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
+
+ if (1) {
+ u32 txqlen = dev->tx_queue_len;
+ RTA_PUT(skb, IFLA_TXQLEN, sizeof(txqlen), &txqlen);
+ }
+
+ if (1) {
+ u32 weight = dev->weight;
+ RTA_PUT(skb, IFLA_WEIGHT, sizeof(weight), &weight);
+ }
+
+ if (1) {
+ struct rtnl_link_ifmap map = {
+ .mem_start = dev->mem_start,
+ .mem_end = dev->mem_end,
+ .base_addr = dev->base_addr,
+ .irq = dev->irq,
+ .dma = dev->dma,
+ .port = dev->if_port,
+ };
+ RTA_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);
}
+
if (1) {
- unsigned mtu = dev->mtu;
+ u32 mtu = dev->mtu;
RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
}
- if (dev->ifindex != dev->iflink)
- RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
+
+ if (dev->ifindex != dev->iflink) {
+ u32 iflink = dev->iflink;
+ RTA_PUT(skb, IFLA_LINK, sizeof(iflink), &iflink);
+ }
+
if (dev->qdisc_sleeping)
RTA_PUT(skb, IFLA_QDISC,
strlen(dev->qdisc_sleeping->ops->id) + 1,
dev->qdisc_sleeping->ops->id);
- if (dev->master)
- RTA_PUT(skb, IFLA_MASTER, sizeof(int), &dev->master->ifindex);
+
+ if (dev->master) {
+ u32 master = dev->master->ifindex;
+ RTA_PUT(skb, IFLA_MASTER, sizeof(master), &master);
+ }
+
if (dev->get_stats) {
unsigned long *stats = (unsigned long*)dev->get_stats(dev);
if (stats) {
return -1;
}
-int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
int idx;
int s_idx = cb->args[0];
for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
if (idx < s_idx)
continue;
- if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, 0) <= 0)
+ if (vx_info_flags(skb->sk->sk_vx_info, VXF_HIDE_NETIF, 0) &&
+ !dev_in_nx_info(dev, skb->sk->sk_nx_info))
+ continue;
+ if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, 0,
+ NLM_F_MULTI) <= 0)
break;
}
read_unlock(&dev_base_lock);
struct ifinfomsg *ifm = NLMSG_DATA(nlh);
struct rtattr **ida = arg;
struct net_device *dev;
- int err;
+ 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];
+
+ if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
+ IFNAMSIZ) >= IFNAMSIZ)
+ return -EINVAL;
+ dev = dev_get_by_name(ifname);
+ } else
+ return -EINVAL;
- dev = dev_get_by_index(ifm->ifi_index);
if (!dev)
return -ENODEV;
err = -EINVAL;
+ if (ifm->ifi_flags)
+ dev_change_flags(dev, ifm->ifi_flags);
+
+ if (ida[IFLA_MAP - 1]) {
+ struct rtnl_link_ifmap *u_map;
+ struct ifmap k_map;
+
+ if (!dev->set_config) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!netif_device_present(dev)) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map)))
+ goto out;
+
+ u_map = RTA_DATA(ida[IFLA_MAP - 1]);
+
+ 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.irq = (unsigned char) u_map->irq;
+ k_map.dma = (unsigned char) u_map->dma;
+ k_map.port = (unsigned char) u_map->port;
+
+ err = dev->set_config(dev, &k_map);
+
+ if (err)
+ goto out;
+ }
+
if (ida[IFLA_ADDRESS - 1]) {
+ struct sockaddr *sa;
+ int len;
+
if (!dev->set_mac_address) {
err = -EOPNOTSUPP;
goto out;
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 out;
+ }
+ sa->sa_family = dev->type;
+ memcpy(sa->sa_data, RTA_DATA(ida[IFLA_ADDRESS - 1]),
+ dev->addr_len);
+ err = dev->set_mac_address(dev, sa);
+ kfree(sa);
if (err)
goto out;
+ send_addr_notify = 1;
}
if (ida[IFLA_BROADCAST - 1]) {
goto out;
memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]),
dev->addr_len);
+ send_addr_notify = 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;
+
+ }
+
+ 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 (ida[IFLA_WEIGHT - 1]) {
+ if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
+ goto out;
+
+ dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
+ }
+
+ if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
+ char ifname[IFNAMSIZ];
+
+ if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
+ IFNAMSIZ) >= IFNAMSIZ)
+ goto out;
+ err = dev_change_name(dev, ifname);
+ if (err)
+ goto out;
}
err = 0;
out:
- if (!err)
+ if (send_addr_notify)
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
dev_put(dev);
void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
{
struct sk_buff *skb;
- int size = NLMSG_GOODSIZE;
+ int size = NLMSG_SPACE(sizeof(struct ifinfomsg) +
+ sizeof(struct rtnl_link_ifmap) +
+ sizeof(struct rtnl_link_stats) + 128);
+ if (vx_flags(VXF_HIDE_NETIF, 0) &&
+ !dev_in_nx_info(dev, current->nx_info))
+ return;
skb = alloc_skb(size, GFP_KERNEL);
if (!skb)
return;
- if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change) < 0) {
+ if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change, 0) < 0) {
kfree_skb(skb);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_KERNEL);
+ NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL);
}
-static int rtnetlink_done(struct netlink_callback *cb)
-{
- return 0;
-}
+/* Protected by RTNL sempahore. */
+static struct rtattr **rta_buf;
+static int rtattr_max;
/* Process one rtnetlink message. */
{
struct rtnetlink_link *link;
struct rtnetlink_link *link_tab;
- struct rtattr *rta[RTATTR_MAX];
-
- int exclusive = 0;
int sz_idx, kind;
int min_len;
int family;
}
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
- u32 rlen;
-
if (link->dumpit == NULL)
link = &(rtnetlink_links[PF_UNSPEC][type]);
goto err_inval;
if ((*errp = netlink_dump_start(rtnl, skb, nlh,
- link->dumpit,
- rtnetlink_done)) != 0) {
+ link->dumpit, NULL)) != 0) {
return -1;
}
- rlen = NLMSG_ALIGN(nlh->nlmsg_len);
- if (rlen > skb->len)
- rlen = skb->len;
- skb_pull(skb, rlen);
- return -1;
- }
- if (kind != 2) {
- if (rtnl_exlock_nowait()) {
- *errp = 0;
- return -1;
- }
- exclusive = 1;
+ netlink_queue_skip(nlh, skb);
+ return -1;
}
- memset(&rta, 0, sizeof(rta));
+ memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
min_len = rtm_min[sz_idx];
if (nlh->nlmsg_len < min_len)
if (flavor) {
if (flavor > rta_max[sz_idx])
goto err_inval;
- rta[flavor-1] = attr;
+ rta_buf[flavor-1] = attr;
}
attr = RTA_NEXT(attr, attrlen);
}
link = &(rtnetlink_links[PF_UNSPEC][type]);
if (link->doit == NULL)
goto err_inval;
- err = link->doit(skb, nlh, (void *)&rta);
+ err = link->doit(skb, nlh, (void *)&rta_buf[0]);
- if (exclusive)
- rtnl_exunlock();
*errp = err;
return err;
err_inval:
- if (exclusive)
- rtnl_exunlock();
*errp = -EINVAL;
return -1;
}
-/*
- * Process one packet of messages.
- * Malformed skbs with wrong lengths of messages are discarded silently.
- */
-
-static inline int rtnetlink_rcv_skb(struct sk_buff *skb)
-{
- int err;
- struct nlmsghdr * nlh;
-
- while (skb->len >= NLMSG_SPACE(0)) {
- u32 rlen;
-
- nlh = (struct nlmsghdr *)skb->data;
- if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
- return 0;
- rlen = NLMSG_ALIGN(nlh->nlmsg_len);
- if (rlen > skb->len)
- rlen = skb->len;
- if (rtnetlink_rcv_msg(skb, nlh, &err)) {
- /* Not error, but we must interrupt processing here:
- * Note, that in this case we do not pull message
- * from skb, it will be processed later.
- */
- if (err == 0)
- return -1;
- netlink_ack(skb, nlh, err);
- } else if (nlh->nlmsg_flags&NLM_F_ACK)
- netlink_ack(skb, nlh, 0);
- skb_pull(skb, rlen);
- }
-
- return 0;
-}
-
-/*
- * rtnetlink input queue processing routine:
- * - try to acquire shared lock. If it is failed, defer processing.
- * - feed skbs to rtnetlink_rcv_skb, until it refuse a message,
- * that will occur, when a dump started and/or acquisition of
- * exclusive lock failed.
- */
-
static void rtnetlink_rcv(struct sock *sk, int len)
{
- do {
- struct sk_buff *skb;
-
- if (rtnl_shlock_nowait())
- return;
-
- while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
- if (rtnetlink_rcv_skb(skb)) {
- if (skb->len)
- skb_queue_head(&sk->sk_receive_queue,
- skb);
- else
- kfree_skb(skb);
- break;
- }
- kfree_skb(skb);
- }
+ unsigned int qlen = 0;
+ do {
+ rtnl_lock();
+ netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
up(&rtnl_sem);
netdev_run_todo();
- } while (rtnl && rtnl->sk_receive_queue.qlen);
+ } while (qlen);
}
-static struct rtnetlink_link link_rtnetlink_table[RTM_MAX-RTM_BASE+1] =
+static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
{
- [RTM_GETLINK - RTM_BASE] = { .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_GETLINK - RTM_BASE] = { .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)
void __init rtnetlink_init(void)
{
- rtnl = netlink_kernel_create(NETLINK_ROUTE, rtnetlink_rcv);
+ int i;
+
+ rtattr_max = 0;
+ for (i = 0; i < ARRAY_SIZE(rta_max); i++)
+ if (rta_max[i] > rtattr_max)
+ rtattr_max = rta_max[i];
+ rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
+ if (!rta_buf)
+ panic("rtnetlink_init: cannot allocate rta_buf\n");
+
+ rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
+ THIS_MODULE);
if (rtnl == NULL)
panic("rtnetlink_init: cannot initialize rtnetlink\n");
netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
}
EXPORT_SYMBOL(__rta_fill);
+EXPORT_SYMBOL(rtattr_strlcpy);
EXPORT_SYMBOL(rtattr_parse);
-EXPORT_SYMBOL(rtnetlink_dump_ifinfo);
EXPORT_SYMBOL(rtnetlink_links);
EXPORT_SYMBOL(rtnetlink_put_metrics);
EXPORT_SYMBOL(rtnl);
EXPORT_SYMBOL(rtnl_lock);
+EXPORT_SYMBOL(rtnl_lock_interruptible);
EXPORT_SYMBOL(rtnl_sem);
EXPORT_SYMBOL(rtnl_unlock);
git://git.onelab.eu / linux-2.6.git / blobdiff