[linux-2.6-block.git] / net / core / net-procfs.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/wext.h>

#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)

#define get_bucket(x) ((x) >> BUCKET_SPACE)
#define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
#define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))

extern struct list_head ptype_all __read_mostly;
extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;

static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
{
	struct net *net = seq_file_net(seq);
	struct net_device *dev;
	struct hlist_head *h;
	unsigned int count = 0, offset = get_offset(*pos);

	h = &net->dev_index_head[get_bucket(*pos)];
	hlist_for_each_entry_rcu(dev, h, index_hlist) {
		if (++count == offset)
			return dev;
	}

	return NULL;
}

static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
{
	struct net_device *dev;
	unsigned int bucket;

	do {
		dev = dev_from_same_bucket(seq, pos);
		if (dev)
			return dev;

		bucket = get_bucket(*pos) + 1;
		*pos = set_bucket_offset(bucket, 1);
	} while (bucket < NETDEV_HASHENTRIES);

	return NULL;
}

/*
 *	This is invoked by the /proc filesystem handler to display a device
 *	in detail.
 */
static void *dev_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(RCU)
{
	rcu_read_lock();
	if (!*pos)
		return SEQ_START_TOKEN;

	if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
		return NULL;

	return dev_from_bucket(seq, pos);
}

static void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	++*pos;
	return dev_from_bucket(seq, pos);
}

static void dev_seq_stop(struct seq_file *seq, void *v)
	__releases(RCU)
{
	rcu_read_unlock();
}

static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
{
	struct rtnl_link_stats64 temp;
	const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);

	seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu "
		   "%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n",
		   dev->name, stats->rx_bytes, stats->rx_packets,
		   stats->rx_errors,
		   stats->rx_dropped + stats->rx_missed_errors,
		   stats->rx_fifo_errors,
		   stats->rx_length_errors + stats->rx_over_errors +
		    stats->rx_crc_errors + stats->rx_frame_errors,
		   stats->rx_compressed, stats->multicast,
		   stats->tx_bytes, stats->tx_packets,
		   stats->tx_errors, stats->tx_dropped,
		   stats->tx_fifo_errors, stats->collisions,
		   stats->tx_carrier_errors +
		    stats->tx_aborted_errors +
		    stats->tx_window_errors +
		    stats->tx_heartbeat_errors,
		   stats->tx_compressed);
}

/*
 *	Called from the PROCfs module. This now uses the new arbitrary sized
 *	/proc/net interface to create /proc/net/dev
 */
static int dev_seq_show(struct seq_file *seq, void *v)
{
	if (v == SEQ_START_TOKEN)
		seq_puts(seq, "Inter-|   Receive                            "
			      "                    |  Transmit\n"
			      " face |bytes    packets errs drop fifo frame "
			      "compressed multicast|bytes    packets errs "
			      "drop fifo colls carrier compressed\n");
	else
		dev_seq_printf_stats(seq, v);
	return 0;
}

static u32 softnet_backlog_len(struct softnet_data *sd)
{
	return skb_queue_len_lockless(&sd->input_pkt_queue) +
	       skb_queue_len_lockless(&sd->process_queue);
}

static struct softnet_data *softnet_get_online(loff_t *pos)
{
	struct softnet_data *sd = NULL;

	while (*pos < nr_cpu_ids)
		if (cpu_online(*pos)) {
			sd = &per_cpu(softnet_data, *pos);
			break;
		} else
			++*pos;
	return sd;
}

static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
{
	return softnet_get_online(pos);
}

static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	++*pos;
	return softnet_get_online(pos);
}

static void softnet_seq_stop(struct seq_file *seq, void *v)
{
}

static int softnet_seq_show(struct seq_file *seq, void *v)
{
	struct softnet_data *sd = v;
	unsigned int flow_limit_count = 0;

#ifdef CONFIG_NET_FLOW_LIMIT
	struct sd_flow_limit *fl;

	rcu_read_lock();
	fl = rcu_dereference(sd->flow_limit);
	if (fl)
		flow_limit_count = fl->count;
	rcu_read_unlock();
#endif

	/* the index is the CPU id owing this sd. Since offline CPUs are not
	 * displayed, it would be othrwise not trivial for the user-space
	 * mapping the data a specific CPU
	 */
	seq_printf(seq,
		   "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
		   sd->processed, sd->dropped, sd->time_squeeze, 0,
		   0, 0, 0, 0, /* was fastroute */
		   0,	/* was cpu_collision */
		   sd->received_rps, flow_limit_count,
		   softnet_backlog_len(sd), (int)seq->index);
	return 0;
}

static const struct seq_operations dev_seq_ops = {
	.start = dev_seq_start,
	.next  = dev_seq_next,
	.stop  = dev_seq_stop,
	.show  = dev_seq_show,
};

static const struct seq_operations softnet_seq_ops = {
	.start = softnet_seq_start,
	.next  = softnet_seq_next,
	.stop  = softnet_seq_stop,
	.show  = softnet_seq_show,
};

static void *ptype_get_idx(loff_t pos)
{
	struct packet_type *pt = NULL;
	loff_t i = 0;
	int t;

	list_for_each_entry_rcu(pt, &ptype_all, list) {
		if (i == pos)
			return pt;
		++i;
	}

	for (t = 0; t < PTYPE_HASH_SIZE; t++) {
		list_for_each_entry_rcu(pt, &ptype_base[t], list) {
			if (i == pos)
				return pt;
			++i;
		}
	}
	return NULL;
}

static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(RCU)
{
	rcu_read_lock();
	return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
}

static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct packet_type *pt;
	struct list_head *nxt;
	int hash;

	++*pos;
	if (v == SEQ_START_TOKEN)
		return ptype_get_idx(0);

	pt = v;
	nxt = pt->list.next;
	if (pt->type == htons(ETH_P_ALL)) {
		if (nxt != &ptype_all)
			goto found;
		hash = 0;
		nxt = ptype_base[0].next;
	} else
		hash = ntohs(pt->type) & PTYPE_HASH_MASK;

	while (nxt == &ptype_base[hash]) {
		if (++hash >= PTYPE_HASH_SIZE)
			return NULL;
		nxt = ptype_base[hash].next;
	}
found:
	return list_entry(nxt, struct packet_type, list);
}

static void ptype_seq_stop(struct seq_file *seq, void *v)
	__releases(RCU)
{
	rcu_read_unlock();
}

static int ptype_seq_show(struct seq_file *seq, void *v)
{
	struct packet_type *pt = v;

	if (v == SEQ_START_TOKEN)
		seq_puts(seq, "Type Device      Function\n");
	else if (pt->dev == NULL || dev_net(pt->dev) == seq_file_net(seq)) {
		if (pt->type == htons(ETH_P_ALL))
			seq_puts(seq, "ALL ");
		else
			seq_printf(seq, "%04x", ntohs(pt->type));

		seq_printf(seq, " %-8s %ps\n",
			   pt->dev ? pt->dev->name : "", pt->func);
	}

	return 0;
}

static const struct seq_operations ptype_seq_ops = {
	.start = ptype_seq_start,
	.next  = ptype_seq_next,
	.stop  = ptype_seq_stop,
	.show  = ptype_seq_show,
};

static int __net_init dev_proc_net_init(struct net *net)
{
	int rc = -ENOMEM;

	if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
			sizeof(struct seq_net_private)))
		goto out;
	if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
			 &softnet_seq_ops))
		goto out_dev;
	if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
			sizeof(struct seq_net_private)))
		goto out_softnet;

	if (wext_proc_init(net))
		goto out_ptype;
	rc = 0;
out:
	return rc;
out_ptype:
	remove_proc_entry("ptype", net->proc_net);
out_softnet:
	remove_proc_entry("softnet_stat", net->proc_net);
out_dev:
	remove_proc_entry("dev", net->proc_net);
	goto out;
}

static void __net_exit dev_proc_net_exit(struct net *net)
{
	wext_proc_exit(net);

	remove_proc_entry("ptype", net->proc_net);
	remove_proc_entry("softnet_stat", net->proc_net);
	remove_proc_entry("dev", net->proc_net);
}

static struct pernet_operations __net_initdata dev_proc_ops = {
	.init = dev_proc_net_init,
	.exit = dev_proc_net_exit,
};

static int dev_mc_seq_show(struct seq_file *seq, void *v)
{
	struct netdev_hw_addr *ha;
	struct net_device *dev = v;

	if (v == SEQ_START_TOKEN)
		return 0;

	netif_addr_lock_bh(dev);
	netdev_for_each_mc_addr(ha, dev) {
		seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
			   dev->ifindex, dev->name,
			   ha->refcount, ha->global_use,
			   (int)dev->addr_len, ha->addr);
	}
	netif_addr_unlock_bh(dev);
	return 0;
}

static const struct seq_operations dev_mc_seq_ops = {
	.start = dev_seq_start,
	.next  = dev_seq_next,
	.stop  = dev_seq_stop,
	.show  = dev_mc_seq_show,
};

static int __net_init dev_mc_net_init(struct net *net)
{
	if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
			sizeof(struct seq_net_private)))
		return -ENOMEM;
	return 0;
}

static void __net_exit dev_mc_net_exit(struct net *net)
{
	remove_proc_entry("dev_mcast", net->proc_net);
}

static struct pernet_operations __net_initdata dev_mc_net_ops = {
	.init = dev_mc_net_init,
	.exit = dev_mc_net_exit,
};

int __init dev_proc_init(void)
{
	int ret = register_pernet_subsys(&dev_proc_ops);
	if (!ret)
		return register_pernet_subsys(&dev_mc_net_ops);
	return ret;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
900ff8c6 CW	2	#include <linux/netdevice.h>
	3	#include <linux/proc_fs.h>
	4	#include <linux/seq_file.h>
	5	#include <net/wext.h>
	6
	7	#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
	8
	9	#define get_bucket(x) ((x) >> BUCKET_SPACE)
	10	#define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
	11	#define set_bucket_offset(b, o) ((b) << BUCKET_SPACE \| (o))
	12
	13	extern struct list_head ptype_all __read_mostly;
	14	extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
	15
	16	static inline struct net_device dev_from_same_bucket(struct seq_file seq, loff_t *pos)
	17	{
	18	struct net *net = seq_file_net(seq);
	19	struct net_device *dev;
900ff8c6 CW	20	struct hlist_head *h;
	21	unsigned int count = 0, offset = get_offset(*pos);
	22
6958c97a JP	23	h = &net->dev_index_head[get_bucket(*pos)];
6958c97a JP	24	hlist_for_each_entry_rcu(dev, h, index_hlist) {
900ff8c6 CW	25	if (++count == offset)
	26	return dev;
	27	}
	28
	29	return NULL;
	30	}
	31
	32	static inline struct net_device dev_from_bucket(struct seq_file seq, loff_t *pos)
	33	{
	34	struct net_device *dev;
	35	unsigned int bucket;
	36
	37	do {
	38	dev = dev_from_same_bucket(seq, pos);
	39	if (dev)
	40	return dev;
	41
	42	bucket = get_bucket(*pos) + 1;
	43	*pos = set_bucket_offset(bucket, 1);
	44	} while (bucket < NETDEV_HASHENTRIES);
	45
	46	return NULL;
	47	}
	48
	49	/*
	50	* This is invoked by the /proc filesystem handler to display a device
	51	* in detail.
	52	*/
	53	static void dev_seq_start(struct seq_file seq, loff_t *pos)
	54	__acquires(RCU)
	55	{
	56	rcu_read_lock();
	57	if (!*pos)
	58	return SEQ_START_TOKEN;
	59
	60	if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
	61	return NULL;
	62
	63	return dev_from_bucket(seq, pos);
	64	}
	65
	66	static void dev_seq_next(struct seq_file seq, void v, loff_t pos)
	67	{
	68	++*pos;
	69	return dev_from_bucket(seq, pos);
	70	}
	71
	72	static void dev_seq_stop(struct seq_file seq, void v)
	73	__releases(RCU)
	74	{
	75	rcu_read_unlock();
	76	}
	77
	78	static void dev_seq_printf_stats(struct seq_file seq, struct net_device dev)
	79	{
	80	struct rtnl_link_stats64 temp;
	81	const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
	82
	83	seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu "
	84	"%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n",
	85	dev->name, stats->rx_bytes, stats->rx_packets,
	86	stats->rx_errors,
	87	stats->rx_dropped + stats->rx_missed_errors,
	88	stats->rx_fifo_errors,
89	stats->rx_length_errors + stats->rx_over_errors +
90	stats->rx_crc_errors + stats->rx_frame_errors,
91	stats->rx_compressed, stats->multicast,
92	stats->tx_bytes, stats->tx_packets,
93	stats->tx_errors, stats->tx_dropped,
94	stats->tx_fifo_errors, stats->collisions,
95	stats->tx_carrier_errors +
96	stats->tx_aborted_errors +
97	stats->tx_window_errors +
98	stats->tx_heartbeat_errors,
99	stats->tx_compressed);
100	}
101
102	/*
103	* Called from the PROCfs module. This now uses the new arbitrary sized
104	* /proc/net interface to create /proc/net/dev
105	*/
106	static int dev_seq_show(struct seq_file seq, void v)
107	{
108	if (v == SEQ_START_TOKEN)
109	seq_puts(seq, "Inter-\| Receive "
110	" \| Transmit\n"
111	" face \|bytes packets errs drop fifo frame "
112	"compressed multicast\|bytes packets errs "
113	"drop fifo colls carrier compressed\n");
114	else
115	dev_seq_printf_stats(seq, v);
116	return 0;
117	}
118
7d58e655 PA	119	static u32 softnet_backlog_len(struct softnet_data *sd)
	120	{
	121	return skb_queue_len_lockless(&sd->input_pkt_queue) +
	122	skb_queue_len_lockless(&sd->process_queue);
	123	}
	124
900ff8c6 CW	125	static struct softnet_data softnet_get_online(loff_t pos)
	126	{
	127	struct softnet_data *sd = NULL;
	128
	129	while (*pos < nr_cpu_ids)
	130	if (cpu_online(*pos)) {
	131	sd = &per_cpu(softnet_data, *pos);
	132	break;
	133	} else
	134	++*pos;
	135	return sd;
	136	}
	137
	138	static void softnet_seq_start(struct seq_file seq, loff_t *pos)
	139	{
	140	return softnet_get_online(pos);
	141	}
	142
	143	static void softnet_seq_next(struct seq_file seq, void v, loff_t pos)
	144	{
	145	++*pos;
	146	return softnet_get_online(pos);
	147	}
	148
	149	static void softnet_seq_stop(struct seq_file seq, void v)
	150	{
	151	}
	152
	153	static int softnet_seq_show(struct seq_file seq, void v)
	154	{
	155	struct softnet_data *sd = v;
99bbc707	156	unsigned int flow_limit_count = 0;
900ff8c6	157
99bbc707 WB	158	#ifdef CONFIG_NET_FLOW_LIMIT
	159	struct sd_flow_limit *fl;
	160
	161	rcu_read_lock();
	162	fl = rcu_dereference(sd->flow_limit);
	163	if (fl)
	164	flow_limit_count = fl->count;
	165	rcu_read_unlock();
	166	#endif
	167
7d58e655 PA	168	/* the index is the CPU id owing this sd. Since offline CPUs are not
	169	* displayed, it would be othrwise not trivial for the user-space
	170	* mapping the data a specific CPU
	171	*/
99bbc707	172	seq_printf(seq,
7d58e655	173	"%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
900ff8c6 CW	174	sd->processed, sd->dropped, sd->time_squeeze, 0,
900ff8c6 CW	175	0, 0, 0, 0, /* was fastroute */
f0cdf76c	176	0, /* was cpu_collision */
7d58e655 PA	177	sd->received_rps, flow_limit_count,
7d58e655 PA	178	softnet_backlog_len(sd), (int)seq->index);
900ff8c6 CW	179	return 0;
	180	}
	181
	182	static const struct seq_operations dev_seq_ops = {
	183	.start = dev_seq_start,
	184	.next = dev_seq_next,
	185	.stop = dev_seq_stop,
	186	.show = dev_seq_show,
	187	};
	188
900ff8c6 CW	189	static const struct seq_operations softnet_seq_ops = {
	190	.start = softnet_seq_start,
	191	.next = softnet_seq_next,
	192	.stop = softnet_seq_stop,
	193	.show = softnet_seq_show,
	194	};
	195
900ff8c6 CW	196	static void *ptype_get_idx(loff_t pos)
	197	{
	198	struct packet_type *pt = NULL;
	199	loff_t i = 0;
	200	int t;
	201
	202	list_for_each_entry_rcu(pt, &ptype_all, list) {
	203	if (i == pos)
	204	return pt;
	205	++i;
	206	}
	207
	208	for (t = 0; t < PTYPE_HASH_SIZE; t++) {
	209	list_for_each_entry_rcu(pt, &ptype_base[t], list) {
	210	if (i == pos)
	211	return pt;
	212	++i;
	213	}
	214	}
	215	return NULL;
	216	}
	217
	218	static void ptype_seq_start(struct seq_file seq, loff_t *pos)
	219	__acquires(RCU)
	220	{
	221	rcu_read_lock();
	222	return pos ? ptype_get_idx(pos - 1) : SEQ_START_TOKEN;
	223	}
	224
	225	static void ptype_seq_next(struct seq_file seq, void v, loff_t pos)
	226	{
	227	struct packet_type *pt;
	228	struct list_head *nxt;
	229	int hash;
	230
	231	++*pos;
	232	if (v == SEQ_START_TOKEN)
	233	return ptype_get_idx(0);
	234
	235	pt = v;
	236	nxt = pt->list.next;
	237	if (pt->type == htons(ETH_P_ALL)) {
	238	if (nxt != &ptype_all)
	239	goto found;
	240	hash = 0;
	241	nxt = ptype_base[0].next;
	242	} else
	243	hash = ntohs(pt->type) & PTYPE_HASH_MASK;
	244
	245	while (nxt == &ptype_base[hash]) {
	246	if (++hash >= PTYPE_HASH_SIZE)
	247	return NULL;
	248	nxt = ptype_base[hash].next;
	249	}
	250	found:
	251	return list_entry(nxt, struct packet_type, list);
	252	}
	253
	254	static void ptype_seq_stop(struct seq_file seq, void v)
	255	__releases(RCU)
	256	{
	257	rcu_read_unlock();
	258	}
	259
260	static int ptype_seq_show(struct seq_file seq, void v)
261	{
262	struct packet_type *pt = v;
263
264	if (v == SEQ_START_TOKEN)
265	seq_puts(seq, "Type Device Function\n");
266	else if (pt->dev == NULL \|\| dev_net(pt->dev) == seq_file_net(seq)) {
267	if (pt->type == htons(ETH_P_ALL))
268	seq_puts(seq, "ALL ");
269	else
270	seq_printf(seq, "%04x", ntohs(pt->type));
271
d75f773c	272	seq_printf(seq, " %-8s %ps\n",
900ff8c6 CW	273	pt->dev ? pt->dev->name : "", pt->func);
	274	}
	275
	276	return 0;
	277	}
	278
	279	static const struct seq_operations ptype_seq_ops = {
	280	.start = ptype_seq_start,
	281	.next = ptype_seq_next,
	282	.stop = ptype_seq_stop,
	283	.show = ptype_seq_show,
	284	};
	285
900ff8c6 CW	286	static int __net_init dev_proc_net_init(struct net *net)
	287	{
	288	int rc = -ENOMEM;
	289
c3506372 CH	290	if (!proc_create_net("dev", 0444, net->proc_net, &dev_seq_ops,
c3506372 CH	291	sizeof(struct seq_net_private)))
900ff8c6	292	goto out;
fddda2b7 CH	293	if (!proc_create_seq("softnet_stat", 0444, net->proc_net,
fddda2b7 CH	294	&softnet_seq_ops))
900ff8c6	295	goto out_dev;
c3506372 CH	296	if (!proc_create_net("ptype", 0444, net->proc_net, &ptype_seq_ops,
c3506372 CH	297	sizeof(struct seq_net_private)))
900ff8c6 CW	298	goto out_softnet;
	299
	300	if (wext_proc_init(net))
	301	goto out_ptype;
	302	rc = 0;
	303	out:
	304	return rc;
	305	out_ptype:
	306	remove_proc_entry("ptype", net->proc_net);
	307	out_softnet:
	308	remove_proc_entry("softnet_stat", net->proc_net);
	309	out_dev:
	310	remove_proc_entry("dev", net->proc_net);
	311	goto out;
	312	}
	313
	314	static void __net_exit dev_proc_net_exit(struct net *net)
	315	{
	316	wext_proc_exit(net);
	317
	318	remove_proc_entry("ptype", net->proc_net);
	319	remove_proc_entry("softnet_stat", net->proc_net);
	320	remove_proc_entry("dev", net->proc_net);
	321	}
	322
	323	static struct pernet_operations __net_initdata dev_proc_ops = {
	324	.init = dev_proc_net_init,
	325	.exit = dev_proc_net_exit,
	326	};
	327
900ff8c6 CW	328	static int dev_mc_seq_show(struct seq_file seq, void v)
	329	{
	330	struct netdev_hw_addr *ha;
	331	struct net_device *dev = v;
	332
	333	if (v == SEQ_START_TOKEN)
	334	return 0;
	335
	336	netif_addr_lock_bh(dev);
	337	netdev_for_each_mc_addr(ha, dev) {
fbd0ac60 JP	338	seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
	339	dev->ifindex, dev->name,
	340	ha->refcount, ha->global_use,
	341	(int)dev->addr_len, ha->addr);
900ff8c6 CW	342	}
	343	netif_addr_unlock_bh(dev);
	344	return 0;
	345	}
	346
	347	static const struct seq_operations dev_mc_seq_ops = {
	348	.start = dev_seq_start,
	349	.next = dev_seq_next,
	350	.stop = dev_seq_stop,
	351	.show = dev_mc_seq_show,
	352	};
	353
900ff8c6 CW	354	static int __net_init dev_mc_net_init(struct net *net)
900ff8c6 CW	355	{
c3506372 CH	356	if (!proc_create_net("dev_mcast", 0, net->proc_net, &dev_mc_seq_ops,
c3506372 CH	357	sizeof(struct seq_net_private)))
900ff8c6 CW	358	return -ENOMEM;
	359	return 0;
	360	}
	361
	362	static void __net_exit dev_mc_net_exit(struct net *net)
	363	{
	364	remove_proc_entry("dev_mcast", net->proc_net);
	365	}
	366
	367	static struct pernet_operations __net_initdata dev_mc_net_ops = {
	368	.init = dev_mc_net_init,
	369	.exit = dev_mc_net_exit,
	370	};
	371
cd061574	372	int __init dev_proc_init(void)
900ff8c6	373	{
cd061574 CW	374	int ret = register_pernet_subsys(&dev_proc_ops);
	375	if (!ret)
	376	return register_pernet_subsys(&dev_mc_net_ops);
	377	return ret;
900ff8c6	378	}