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netns: ipmr: declare ipmr /proc/net entries per-namespace
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Declare IPv4 multicast forwarding /proc/net entries per-namespace:
/proc/net/ip_mr_vif
/proc/net/ip_mr_cache

Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Benjamin Thery authored and David S. Miller committed Jan 22, 2009
1 parent 6c5143d commit f6bb451
Showing 1 changed file with 62 additions and 39 deletions.
101 changes: 62 additions & 39 deletions net/ipv4/ipmr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1671,41 +1671,46 @@ int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait)
* The /proc interfaces to multicast routing /proc/ip_mr_cache /proc/ip_mr_vif
*/
struct ipmr_vif_iter {
struct seq_net_private p;
int ct;
};

static struct vif_device *ipmr_vif_seq_idx(struct ipmr_vif_iter *iter,
static struct vif_device *ipmr_vif_seq_idx(struct net *net,
struct ipmr_vif_iter *iter,
loff_t pos)
{
for (iter->ct = 0; iter->ct < init_net.ipv4.maxvif; ++iter->ct) {
if (!VIF_EXISTS(&init_net, iter->ct))
for (iter->ct = 0; iter->ct < net->ipv4.maxvif; ++iter->ct) {
if (!VIF_EXISTS(net, iter->ct))
continue;
if (pos-- == 0)
return &init_net.ipv4.vif_table[iter->ct];
return &net->ipv4.vif_table[iter->ct];
}
return NULL;
}

static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(mrt_lock)
{
struct net *net = seq_file_net(seq);

read_lock(&mrt_lock);
return *pos ? ipmr_vif_seq_idx(seq->private, *pos - 1)
return *pos ? ipmr_vif_seq_idx(net, seq->private, *pos - 1)
: SEQ_START_TOKEN;
}

static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct ipmr_vif_iter *iter = seq->private;
struct net *net = seq_file_net(seq);

++*pos;
if (v == SEQ_START_TOKEN)
return ipmr_vif_seq_idx(iter, 0);
return ipmr_vif_seq_idx(net, iter, 0);

while (++iter->ct < init_net.ipv4.maxvif) {
if (!VIF_EXISTS(&init_net, iter->ct))
while (++iter->ct < net->ipv4.maxvif) {
if (!VIF_EXISTS(net, iter->ct))
continue;
return &init_net.ipv4.vif_table[iter->ct];
return &net->ipv4.vif_table[iter->ct];
}
return NULL;
}
Expand All @@ -1718,6 +1723,8 @@ static void ipmr_vif_seq_stop(struct seq_file *seq, void *v)

static int ipmr_vif_seq_show(struct seq_file *seq, void *v)
{
struct net *net = seq_file_net(seq);

if (v == SEQ_START_TOKEN) {
seq_puts(seq,
"Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n");
Expand All @@ -1727,7 +1734,7 @@ static int ipmr_vif_seq_show(struct seq_file *seq, void *v)

seq_printf(seq,
"%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n",
vif - init_net.ipv4.vif_table,
vif - net->ipv4.vif_table,
name, vif->bytes_in, vif->pkt_in,
vif->bytes_out, vif->pkt_out,
vif->flags, vif->local, vif->remote);
Expand All @@ -1744,32 +1751,34 @@ static const struct seq_operations ipmr_vif_seq_ops = {

static int ipmr_vif_open(struct inode *inode, struct file *file)
{
return seq_open_private(file, &ipmr_vif_seq_ops,
sizeof(struct ipmr_vif_iter));
return seq_open_net(inode, file, &ipmr_vif_seq_ops,
sizeof(struct ipmr_vif_iter));
}

static const struct file_operations ipmr_vif_fops = {
.owner = THIS_MODULE,
.open = ipmr_vif_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
.release = seq_release_net,
};

struct ipmr_mfc_iter {
struct seq_net_private p;
struct mfc_cache **cache;
int ct;
};


static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos)
static struct mfc_cache *ipmr_mfc_seq_idx(struct net *net,
struct ipmr_mfc_iter *it, loff_t pos)
{
struct mfc_cache *mfc;

it->cache = init_net.ipv4.mfc_cache_array;
it->cache = net->ipv4.mfc_cache_array;
read_lock(&mrt_lock);
for (it->ct = 0; it->ct < MFC_LINES; it->ct++)
for (mfc = init_net.ipv4.mfc_cache_array[it->ct];
for (mfc = net->ipv4.mfc_cache_array[it->ct];
mfc; mfc = mfc->next)
if (pos-- == 0)
return mfc;
Expand All @@ -1778,7 +1787,8 @@ static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos)
it->cache = &mfc_unres_queue;
spin_lock_bh(&mfc_unres_lock);
for (mfc = mfc_unres_queue; mfc; mfc = mfc->next)
if (pos-- == 0)
if (net_eq(mfc_net(mfc), net) &&
pos-- == 0)
return mfc;
spin_unlock_bh(&mfc_unres_lock);

Expand All @@ -1790,32 +1800,35 @@ static struct mfc_cache *ipmr_mfc_seq_idx(struct ipmr_mfc_iter *it, loff_t pos)
static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
{
struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);

it->cache = NULL;
it->ct = 0;
return *pos ? ipmr_mfc_seq_idx(seq->private, *pos - 1)
return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
: SEQ_START_TOKEN;
}

static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct mfc_cache *mfc = v;
struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);

++*pos;

if (v == SEQ_START_TOKEN)
return ipmr_mfc_seq_idx(seq->private, 0);
return ipmr_mfc_seq_idx(net, seq->private, 0);

if (mfc->next)
return mfc->next;

if (it->cache == &mfc_unres_queue)
goto end_of_list;

BUG_ON(it->cache != init_net.ipv4.mfc_cache_array);
BUG_ON(it->cache != net->ipv4.mfc_cache_array);

while (++it->ct < MFC_LINES) {
mfc = init_net.ipv4.mfc_cache_array[it->ct];
mfc = net->ipv4.mfc_cache_array[it->ct];
if (mfc)
return mfc;
}
Expand All @@ -1827,6 +1840,8 @@ static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)

spin_lock_bh(&mfc_unres_lock);
mfc = mfc_unres_queue;
while (mfc && !net_eq(mfc_net(mfc), net))
mfc = mfc->next;
if (mfc)
return mfc;

Expand All @@ -1840,16 +1855,18 @@ static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
{
struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);

if (it->cache == &mfc_unres_queue)
spin_unlock_bh(&mfc_unres_lock);
else if (it->cache == init_net.ipv4.mfc_cache_array)
else if (it->cache == net->ipv4.mfc_cache_array)
read_unlock(&mrt_lock);
}

static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
{
int n;
struct net *net = seq_file_net(seq);

if (v == SEQ_START_TOKEN) {
seq_puts(seq,
Expand All @@ -1870,7 +1887,7 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
mfc->mfc_un.res.wrong_if);
for (n = mfc->mfc_un.res.minvif;
n < mfc->mfc_un.res.maxvif; n++ ) {
if (VIF_EXISTS(&init_net, n) &&
if (VIF_EXISTS(net, n) &&
mfc->mfc_un.res.ttls[n] < 255)
seq_printf(seq,
" %2d:%-3d",
Expand All @@ -1896,16 +1913,16 @@ static const struct seq_operations ipmr_mfc_seq_ops = {

static int ipmr_mfc_open(struct inode *inode, struct file *file)
{
return seq_open_private(file, &ipmr_mfc_seq_ops,
sizeof(struct ipmr_mfc_iter));
return seq_open_net(inode, file, &ipmr_mfc_seq_ops,
sizeof(struct ipmr_mfc_iter));
}

static const struct file_operations ipmr_mfc_fops = {
.owner = THIS_MODULE,
.open = ipmr_mfc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
.release = seq_release_net,
};
#endif

Expand Down Expand Up @@ -1942,8 +1959,22 @@ static int __net_init ipmr_net_init(struct net *net)
#ifdef CONFIG_IP_PIMSM
net->ipv4.mroute_reg_vif_num = -1;
#endif

#ifdef CONFIG_PROC_FS
err = -ENOMEM;
if (!proc_net_fops_create(net, "ip_mr_vif", 0, &ipmr_vif_fops))
goto proc_vif_fail;
if (!proc_net_fops_create(net, "ip_mr_cache", 0, &ipmr_mfc_fops))
goto proc_cache_fail;
#endif
return 0;

#ifdef CONFIG_PROC_FS
proc_cache_fail:
proc_net_remove(net, "ip_mr_vif");
proc_vif_fail:
kfree(net->ipv4.mfc_cache_array);
#endif
fail_mfc_cache:
kfree(net->ipv4.vif_table);
fail:
Expand All @@ -1952,6 +1983,10 @@ static int __net_init ipmr_net_init(struct net *net)

static void __net_exit ipmr_net_exit(struct net *net)
{
#ifdef CONFIG_PROC_FS
proc_net_remove(net, "ip_mr_cache");
proc_net_remove(net, "ip_mr_vif");
#endif
kfree(net->ipv4.mfc_cache_array);
kfree(net->ipv4.vif_table);
}
Expand Down Expand Up @@ -1980,20 +2015,8 @@ int __init ip_mr_init(void)
err = register_netdevice_notifier(&ip_mr_notifier);
if (err)
goto reg_notif_fail;
#ifdef CONFIG_PROC_FS
err = -ENOMEM;
if (!proc_net_fops_create(&init_net, "ip_mr_vif", 0, &ipmr_vif_fops))
goto proc_vif_fail;
if (!proc_net_fops_create(&init_net, "ip_mr_cache", 0, &ipmr_mfc_fops))
goto proc_cache_fail;
#endif
return 0;
#ifdef CONFIG_PROC_FS
proc_cache_fail:
proc_net_remove(&init_net, "ip_mr_vif");
proc_vif_fail:
unregister_netdevice_notifier(&ip_mr_notifier);
#endif

reg_notif_fail:
del_timer(&ipmr_expire_timer);
unregister_pernet_subsys(&ipmr_net_ops);
Expand Down

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