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Diffstat (limited to 'net/ipv4/ipmr.c')
-rw-r--r--net/ipv4/ipmr.c88
1 files changed, 49 insertions, 39 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 9d78427652d2..3a2c0162c3ba 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -73,9 +73,7 @@
struct mr_table {
struct list_head list;
-#ifdef CONFIG_NET_NS
- struct net *net;
-#endif
+ possible_net_t net;
u32 id;
struct sock __rcu *mroute_sk;
struct timer_list ipmr_expire_timer;
@@ -191,7 +189,7 @@ static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp,
}
mrt = ipmr_get_table(rule->fr_net, rule->table);
- if (mrt == NULL)
+ if (!mrt)
return -EAGAIN;
res->mrt = mrt;
return 0;
@@ -255,7 +253,7 @@ static int __net_init ipmr_rules_init(struct net *net)
INIT_LIST_HEAD(&net->ipv4.mr_tables);
mrt = ipmr_new_table(net, RT_TABLE_DEFAULT);
- if (mrt == NULL) {
+ if (!mrt) {
err = -ENOMEM;
goto err1;
}
@@ -268,7 +266,7 @@ static int __net_init ipmr_rules_init(struct net *net)
return 0;
err2:
- kfree(mrt);
+ ipmr_free_table(mrt);
err1:
fib_rules_unregister(ops);
return err;
@@ -278,11 +276,13 @@ static void __net_exit ipmr_rules_exit(struct net *net)
{
struct mr_table *mrt, *next;
+ rtnl_lock();
list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) {
list_del(&mrt->list);
ipmr_free_table(mrt);
}
fib_rules_unregister(net->ipv4.mr_rules_ops);
+ rtnl_unlock();
}
#else
#define ipmr_for_each_table(mrt, net) \
@@ -308,7 +308,10 @@ static int __net_init ipmr_rules_init(struct net *net)
static void __net_exit ipmr_rules_exit(struct net *net)
{
+ rtnl_lock();
ipmr_free_table(net->ipv4.mrt);
+ net->ipv4.mrt = NULL;
+ rtnl_unlock();
}
#endif
@@ -318,11 +321,11 @@ static struct mr_table *ipmr_new_table(struct net *net, u32 id)
unsigned int i;
mrt = ipmr_get_table(net, id);
- if (mrt != NULL)
+ if (mrt)
return mrt;
mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
- if (mrt == NULL)
+ if (!mrt)
return NULL;
write_pnet(&mrt->net, net);
mrt->id = id;
@@ -424,7 +427,7 @@ struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
dev->flags |= IFF_MULTICAST;
in_dev = __in_dev_get_rtnl(dev);
- if (in_dev == NULL)
+ if (!in_dev)
goto failure;
ipv4_devconf_setall(in_dev);
@@ -475,8 +478,14 @@ static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
+static int reg_vif_get_iflink(const struct net_device *dev)
+{
+ return 0;
+}
+
static const struct net_device_ops reg_vif_netdev_ops = {
.ndo_start_xmit = reg_vif_xmit,
+ .ndo_get_iflink = reg_vif_get_iflink,
};
static void reg_vif_setup(struct net_device *dev)
@@ -502,7 +511,7 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup);
- if (dev == NULL)
+ if (!dev)
return NULL;
dev_net_set(dev, net);
@@ -511,7 +520,6 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
free_netdev(dev);
return NULL;
}
- dev->iflink = 0;
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
@@ -759,7 +767,7 @@ static int vif_add(struct net *net, struct mr_table *mrt,
case 0:
if (vifc->vifc_flags == VIFF_USE_IFINDEX) {
dev = dev_get_by_index(net, vifc->vifc_lcl_ifindex);
- if (dev && __in_dev_get_rtnl(dev) == NULL) {
+ if (dev && !__in_dev_get_rtnl(dev)) {
dev_put(dev);
return -EADDRNOTAVAIL;
}
@@ -803,7 +811,7 @@ static int vif_add(struct net *net, struct mr_table *mrt,
v->pkt_out = 0;
v->link = dev->ifindex;
if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER))
- v->link = dev->iflink;
+ v->link = dev_get_iflink(dev);
/* And finish update writing critical data */
write_lock_bh(&mrt_lock);
@@ -1005,7 +1013,7 @@ static int ipmr_cache_report(struct mr_table *mrt,
rcu_read_lock();
mroute_sk = rcu_dereference(mrt->mroute_sk);
- if (mroute_sk == NULL) {
+ if (!mroute_sk) {
rcu_read_unlock();
kfree_skb(skb);
return -EINVAL;
@@ -1158,7 +1166,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
return -EINVAL;
c = ipmr_cache_alloc();
- if (c == NULL)
+ if (!c)
return -ENOMEM;
c->mfc_origin = mfc->mfcc_origin.s_addr;
@@ -1280,7 +1288,7 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
return -EOPNOTSUPP;
mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return -ENOENT;
if (optname != MRT_INIT) {
@@ -1443,7 +1451,7 @@ int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int
return -EOPNOTSUPP;
mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return -ENOENT;
if (optname != MRT_VERSION &&
@@ -1489,7 +1497,7 @@ int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
struct mr_table *mrt;
mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return -ENOENT;
switch (cmd) {
@@ -1563,7 +1571,7 @@ int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
struct mr_table *mrt;
mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return -ENOENT;
switch (cmd) {
@@ -1644,7 +1652,8 @@ static struct notifier_block ip_mr_notifier = {
* important for multicast video.
*/
-static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr)
+static void ip_encap(struct net *net, struct sk_buff *skb,
+ __be32 saddr, __be32 daddr)
{
struct iphdr *iph;
const struct iphdr *old_iph = ip_hdr(skb);
@@ -1663,14 +1672,14 @@ static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr)
iph->protocol = IPPROTO_IPIP;
iph->ihl = 5;
iph->tot_len = htons(skb->len);
- ip_select_ident(skb, NULL);
+ ip_select_ident(net, skb, NULL);
ip_send_check(iph);
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
nf_reset(skb);
}
-static inline int ipmr_forward_finish(struct sk_buff *skb)
+static inline int ipmr_forward_finish(struct sock *sk, struct sk_buff *skb)
{
struct ip_options *opt = &(IPCB(skb)->opt);
@@ -1680,7 +1689,7 @@ static inline int ipmr_forward_finish(struct sk_buff *skb)
if (unlikely(opt->optlen))
ip_forward_options(skb);
- return dst_output(skb);
+ return dst_output_sk(sk, skb);
}
/*
@@ -1697,7 +1706,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
struct flowi4 fl4;
int encap = 0;
- if (vif->dev == NULL)
+ if (!vif->dev)
goto out_free;
#ifdef CONFIG_IP_PIMSM
@@ -1760,7 +1769,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
* What do we do with netfilter? -- RR
*/
if (vif->flags & VIFF_TUNNEL) {
- ip_encap(skb, vif->local, vif->remote);
+ ip_encap(net, skb, vif->local, vif->remote);
/* FIXME: extra output firewall step used to be here. --RR */
vif->dev->stats.tx_packets++;
vif->dev->stats.tx_bytes += skb->len;
@@ -1779,7 +1788,8 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
* not mrouter) cannot join to more than one interface - it will
* result in receiving multiple packets.
*/
- NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, skb, skb->dev, dev,
+ NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, NULL, skb,
+ skb->dev, dev,
ipmr_forward_finish);
return;
@@ -1988,7 +1998,7 @@ int ip_mr_input(struct sk_buff *skb)
/* already under rcu_read_lock() */
cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
- if (cache == NULL) {
+ if (!cache) {
int vif = ipmr_find_vif(mrt, skb->dev);
if (vif >= 0)
@@ -1999,13 +2009,13 @@ int ip_mr_input(struct sk_buff *skb)
/*
* No usable cache entry
*/
- if (cache == NULL) {
+ if (!cache) {
int vif;
if (local) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
ip_local_deliver(skb);
- if (skb2 == NULL)
+ if (!skb2)
return -ENOBUFS;
skb = skb2;
}
@@ -2064,7 +2074,7 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev;
read_unlock(&mrt_lock);
- if (reg_dev == NULL)
+ if (!reg_dev)
return 1;
skb->mac_header = skb->network_header;
@@ -2194,18 +2204,18 @@ int ipmr_get_route(struct net *net, struct sk_buff *skb,
int err;
mrt = ipmr_get_table(net, RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return -ENOENT;
rcu_read_lock();
cache = ipmr_cache_find(mrt, saddr, daddr);
- if (cache == NULL && skb->dev) {
+ if (!cache && skb->dev) {
int vif = ipmr_find_vif(mrt, skb->dev);
if (vif >= 0)
cache = ipmr_cache_find_any(mrt, daddr, vif);
}
- if (cache == NULL) {
+ if (!cache) {
struct sk_buff *skb2;
struct iphdr *iph;
struct net_device *dev;
@@ -2263,7 +2273,7 @@ static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb,
int err;
nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags);
- if (nlh == NULL)
+ if (!nlh)
return -EMSGSIZE;
rtm = nlmsg_data(nlh);
@@ -2282,8 +2292,8 @@ static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb,
rtm->rtm_protocol = RTPROT_MROUTED;
rtm->rtm_flags = 0;
- if (nla_put_be32(skb, RTA_SRC, c->mfc_origin) ||
- nla_put_be32(skb, RTA_DST, c->mfc_mcastgrp))
+ if (nla_put_in_addr(skb, RTA_SRC, c->mfc_origin) ||
+ nla_put_in_addr(skb, RTA_DST, c->mfc_mcastgrp))
goto nla_put_failure;
err = __ipmr_fill_mroute(mrt, skb, c, rtm);
/* do not break the dump if cache is unresolved */
@@ -2328,7 +2338,7 @@ static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc,
skb = nlmsg_new(mroute_msgsize(mfc->mfc_parent >= MAXVIFS, mrt->maxvif),
GFP_ATOMIC);
- if (skb == NULL)
+ if (!skb)
goto errout;
err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0);
@@ -2443,7 +2453,7 @@ static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos)
struct mr_table *mrt;
mrt = ipmr_get_table(net, RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return ERR_PTR(-ENOENT);
iter->mrt = mrt;
@@ -2562,7 +2572,7 @@ static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
struct mr_table *mrt;
mrt = ipmr_get_table(net, RT_TABLE_DEFAULT);
- if (mrt == NULL)
+ if (!mrt)
return ERR_PTR(-ENOENT);
it->mrt = mrt;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.