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

#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_name_head[get_bucket(*pos)];
	hlist_for_each_entry_rcu(dev, h, name_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 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

	seq_printf(seq,
		   "%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 */
		   sd->cpu_collision, sd->received_rps, flow_limit_count);
	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 int dev_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &dev_seq_ops,
			    sizeof(struct seq_net_private));
}

static const struct file_operations dev_seq_fops = {
	.owner	 = THIS_MODULE,
	.open    = dev_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};

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 int softnet_seq_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &softnet_seq_ops);
}

static const struct file_operations softnet_seq_fops = {
	.owner	 = THIS_MODULE,
	.open    = softnet_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release,
};

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 %pf\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 ptype_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &ptype_seq_ops,
			sizeof(struct seq_net_private));
}

static const struct file_operations ptype_seq_fops = {
	.owner	 = THIS_MODULE,
	.open    = ptype_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};


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

	if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops))
		goto out;
	if (!proc_create("softnet_stat", S_IRUGO, net->proc_net,
			 &softnet_seq_fops))
		goto out_dev;
	if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops))
		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) {
		int i;

		seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
			   dev->name, ha->refcount, ha->global_use);

		for (i = 0; i < dev->addr_len; i++)
			seq_printf(seq, "%02x", ha->addr[i]);

		seq_putc(seq, '\n');
	}
	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 dev_mc_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &dev_mc_seq_ops,
			    sizeof(struct seq_net_private));
}

static const struct file_operations dev_mc_seq_fops = {
	.owner	 = THIS_MODULE,
	.open    = dev_mc_seq_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};

static int __net_init dev_mc_net_init(struct net *net)
{
	if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops))
		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
900ff8c6 CW	1	#include <linux/netdevice.h>
	2	#include <linux/proc_fs.h>
	3	#include <linux/seq_file.h>
	4	#include <net/wext.h>
	5
	6	#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
	7
	8	#define get_bucket(x) ((x) >> BUCKET_SPACE)
	9	#define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
	10	#define set_bucket_offset(b, o) ((b) << BUCKET_SPACE \| (o))
	11
	12	extern struct list_head ptype_all __read_mostly;
	13	extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
	14
	15	static inline struct net_device dev_from_same_bucket(struct seq_file seq, loff_t *pos)
	16	{
	17	struct net *net = seq_file_net(seq);
	18	struct net_device *dev;
900ff8c6 CW	19	struct hlist_head *h;
	20	unsigned int count = 0, offset = get_offset(*pos);
	21
	22	h = &net->dev_name_head[get_bucket(*pos)];
b67bfe0d	23	hlist_for_each_entry_rcu(dev, h, name_hlist) {
900ff8c6 CW	24	if (++count == offset)
	25	return dev;
	26	}
	27
	28	return NULL;
	29	}
	30
	31	static inline struct net_device dev_from_bucket(struct seq_file seq, loff_t *pos)
	32	{
	33	struct net_device *dev;
	34	unsigned int bucket;
	35
	36	do {
	37	dev = dev_from_same_bucket(seq, pos);
	38	if (dev)
	39	return dev;
	40
	41	bucket = get_bucket(*pos) + 1;
	42	*pos = set_bucket_offset(bucket, 1);
	43	} while (bucket < NETDEV_HASHENTRIES);
	44
	45	return NULL;
	46	}
	47
	48	/*
	49	* This is invoked by the /proc filesystem handler to display a device
	50	* in detail.
	51	*/
	52	static void dev_seq_start(struct seq_file seq, loff_t *pos)
	53	__acquires(RCU)
	54	{
	55	rcu_read_lock();
	56	if (!*pos)
	57	return SEQ_START_TOKEN;
	58
	59	if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
	60	return NULL;
	61
	62	return dev_from_bucket(seq, pos);
	63	}
	64
	65	static void dev_seq_next(struct seq_file seq, void v, loff_t pos)
	66	{
	67	++*pos;
	68	return dev_from_bucket(seq, pos);
	69	}
	70
	71	static void dev_seq_stop(struct seq_file seq, void v)
	72	__releases(RCU)
	73	{
	74	rcu_read_unlock();
	75	}
	76
	77	static void dev_seq_printf_stats(struct seq_file seq, struct net_device dev)
	78	{
	79	struct rtnl_link_stats64 temp;
	80	const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
	81
	82	seq_printf(seq, "%6s: %7llu %7llu %4llu %4llu %4llu %5llu %10llu %9llu "
	83	"%8llu %7llu %4llu %4llu %4llu %5llu %7llu %10llu\n",
	84	dev->name, stats->rx_bytes, stats->rx_packets,
	85	stats->rx_errors,
	86	stats->rx_dropped + stats->rx_missed_errors,
	87	stats->rx_fifo_errors,
88	stats->rx_length_errors + stats->rx_over_errors +
89	stats->rx_crc_errors + stats->rx_frame_errors,
90	stats->rx_compressed, stats->multicast,
91	stats->tx_bytes, stats->tx_packets,
92	stats->tx_errors, stats->tx_dropped,
93	stats->tx_fifo_errors, stats->collisions,
94	stats->tx_carrier_errors +
95	stats->tx_aborted_errors +
96	stats->tx_window_errors +
97	stats->tx_heartbeat_errors,
98	stats->tx_compressed);
99	}
100
101	/*
102	* Called from the PROCfs module. This now uses the new arbitrary sized
103	* /proc/net interface to create /proc/net/dev
104	*/
105	static int dev_seq_show(struct seq_file seq, void v)
106	{
107	if (v == SEQ_START_TOKEN)
108	seq_puts(seq, "Inter-\| Receive "
109	" \| Transmit\n"
110	" face \|bytes packets errs drop fifo frame "
111	"compressed multicast\|bytes packets errs "
112	"drop fifo colls carrier compressed\n");
113	else
114	dev_seq_printf_stats(seq, v);
115	return 0;
116	}
117
118	static struct softnet_data softnet_get_online(loff_t pos)
119	{
120	struct softnet_data *sd = NULL;
121
122	while (*pos < nr_cpu_ids)
123	if (cpu_online(*pos)) {
124	sd = &per_cpu(softnet_data, *pos);
125	break;
126	} else
127	++*pos;
128	return sd;
129	}
130
131	static void softnet_seq_start(struct seq_file seq, loff_t *pos)
132	{
133	return softnet_get_online(pos);
134	}
135
136	static void softnet_seq_next(struct seq_file seq, void v, loff_t pos)
137	{
138	++*pos;
139	return softnet_get_online(pos);
140	}
141
142	static void softnet_seq_stop(struct seq_file seq, void v)
143	{
144	}
145
146	static int softnet_seq_show(struct seq_file seq, void v)
147	{
148	struct softnet_data *sd = v;
99bbc707	149	unsigned int flow_limit_count = 0;
900ff8c6	150
99bbc707 WB	151	#ifdef CONFIG_NET_FLOW_LIMIT
	152	struct sd_flow_limit *fl;
	153
	154	rcu_read_lock();
	155	fl = rcu_dereference(sd->flow_limit);
	156	if (fl)
	157	flow_limit_count = fl->count;
	158	rcu_read_unlock();
	159	#endif
	160
	161	seq_printf(seq,
	162	"%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
900ff8c6 CW	163	sd->processed, sd->dropped, sd->time_squeeze, 0,
900ff8c6 CW	164	0, 0, 0, 0, /* was fastroute */
99bbc707	165	sd->cpu_collision, sd->received_rps, flow_limit_count);
900ff8c6 CW	166	return 0;
	167	}
	168
	169	static const struct seq_operations dev_seq_ops = {
	170	.start = dev_seq_start,
	171	.next = dev_seq_next,
	172	.stop = dev_seq_stop,
	173	.show = dev_seq_show,
	174	};
	175
	176	static int dev_seq_open(struct inode inode, struct file file)
	177	{
	178	return seq_open_net(inode, file, &dev_seq_ops,
	179	sizeof(struct seq_net_private));
	180	}
	181
	182	static const struct file_operations dev_seq_fops = {
	183	.owner = THIS_MODULE,
	184	.open = dev_seq_open,
	185	.read = seq_read,
	186	.llseek = seq_lseek,
	187	.release = seq_release_net,
	188	};
	189
	190	static const struct seq_operations softnet_seq_ops = {
	191	.start = softnet_seq_start,
	192	.next = softnet_seq_next,
	193	.stop = softnet_seq_stop,
	194	.show = softnet_seq_show,
	195	};
	196
	197	static int softnet_seq_open(struct inode inode, struct file file)
	198	{
	199	return seq_open(file, &softnet_seq_ops);
	200	}
	201
	202	static const struct file_operations softnet_seq_fops = {
	203	.owner = THIS_MODULE,
	204	.open = softnet_seq_open,
	205	.read = seq_read,
	206	.llseek = seq_lseek,
	207	.release = seq_release,
	208	};
	209
	210	static void *ptype_get_idx(loff_t pos)
	211	{
	212	struct packet_type *pt = NULL;
	213	loff_t i = 0;
	214	int t;
	215
	216	list_for_each_entry_rcu(pt, &ptype_all, list) {
	217	if (i == pos)
	218	return pt;
	219	++i;
	220	}
	221
	222	for (t = 0; t < PTYPE_HASH_SIZE; t++) {
	223	list_for_each_entry_rcu(pt, &ptype_base[t], list) {
	224	if (i == pos)
	225	return pt;
	226	++i;
	227	}
	228	}
	229	return NULL;
230	}
231
232	static void ptype_seq_start(struct seq_file seq, loff_t *pos)
233	__acquires(RCU)
234	{
235	rcu_read_lock();
236	return pos ? ptype_get_idx(pos - 1) : SEQ_START_TOKEN;
237	}
238
239	static void ptype_seq_next(struct seq_file seq, void v, loff_t pos)
240	{
241	struct packet_type *pt;
242	struct list_head *nxt;
243	int hash;
244
245	++*pos;
246	if (v == SEQ_START_TOKEN)
247	return ptype_get_idx(0);
248
249	pt = v;
250	nxt = pt->list.next;
251	if (pt->type == htons(ETH_P_ALL)) {
252	if (nxt != &ptype_all)
253	goto found;
254	hash = 0;
255	nxt = ptype_base[0].next;
256	} else
257	hash = ntohs(pt->type) & PTYPE_HASH_MASK;
258
259	while (nxt == &ptype_base[hash]) {
260	if (++hash >= PTYPE_HASH_SIZE)
261	return NULL;
262	nxt = ptype_base[hash].next;
263	}
264	found:
265	return list_entry(nxt, struct packet_type, list);
266	}
267
268	static void ptype_seq_stop(struct seq_file seq, void v)
269	__releases(RCU)
270	{
271	rcu_read_unlock();
272	}
273
274	static int ptype_seq_show(struct seq_file seq, void v)
275	{
276	struct packet_type *pt = v;
277
278	if (v == SEQ_START_TOKEN)
279	seq_puts(seq, "Type Device Function\n");
280	else if (pt->dev == NULL \|\| dev_net(pt->dev) == seq_file_net(seq)) {
281	if (pt->type == htons(ETH_P_ALL))
282	seq_puts(seq, "ALL ");
283	else
284	seq_printf(seq, "%04x", ntohs(pt->type));
285
eaac5f3d	286	seq_printf(seq, " %-8s %pf\n",
900ff8c6 CW	287	pt->dev ? pt->dev->name : "", pt->func);
	288	}
	289
	290	return 0;
	291	}
	292
	293	static const struct seq_operations ptype_seq_ops = {
	294	.start = ptype_seq_start,
	295	.next = ptype_seq_next,
	296	.stop = ptype_seq_stop,
	297	.show = ptype_seq_show,
	298	};
	299
	300	static int ptype_seq_open(struct inode inode, struct file file)
	301	{
	302	return seq_open_net(inode, file, &ptype_seq_ops,
	303	sizeof(struct seq_net_private));
	304	}
	305
	306	static const struct file_operations ptype_seq_fops = {
	307	.owner = THIS_MODULE,
	308	.open = ptype_seq_open,
	309	.read = seq_read,
	310	.llseek = seq_lseek,
	311	.release = seq_release_net,
	312	};
	313
	314
	315	static int __net_init dev_proc_net_init(struct net *net)
	316	{
	317	int rc = -ENOMEM;
	318
	319	if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops))
	320	goto out;
	321	if (!proc_create("softnet_stat", S_IRUGO, net->proc_net,
	322	&softnet_seq_fops))
	323	goto out_dev;
	324	if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops))
	325	goto out_softnet;
	326
	327	if (wext_proc_init(net))
	328	goto out_ptype;
	329	rc = 0;
	330	out:
	331	return rc;
	332	out_ptype:
	333	remove_proc_entry("ptype", net->proc_net);
	334	out_softnet:
	335	remove_proc_entry("softnet_stat", net->proc_net);
	336	out_dev:
	337	remove_proc_entry("dev", net->proc_net);
	338	goto out;
	339	}
	340
	341	static void __net_exit dev_proc_net_exit(struct net *net)
	342	{
	343	wext_proc_exit(net);
	344
	345	remove_proc_entry("ptype", net->proc_net);
	346	remove_proc_entry("softnet_stat", net->proc_net);
	347	remove_proc_entry("dev", net->proc_net);
	348	}
	349
	350	static struct pernet_operations __net_initdata dev_proc_ops = {
351	.init = dev_proc_net_init,
352	.exit = dev_proc_net_exit,
353	};
354
900ff8c6 CW	355	static int dev_mc_seq_show(struct seq_file seq, void v)
	356	{
	357	struct netdev_hw_addr *ha;
	358	struct net_device *dev = v;
	359
	360	if (v == SEQ_START_TOKEN)
	361	return 0;
	362
	363	netif_addr_lock_bh(dev);
	364	netdev_for_each_mc_addr(ha, dev) {
	365	int i;
	366
	367	seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
	368	dev->name, ha->refcount, ha->global_use);
	369
	370	for (i = 0; i < dev->addr_len; i++)
	371	seq_printf(seq, "%02x", ha->addr[i]);
	372
	373	seq_putc(seq, '\n');
	374	}
	375	netif_addr_unlock_bh(dev);
	376	return 0;
	377	}
	378
	379	static const struct seq_operations dev_mc_seq_ops = {
	380	.start = dev_seq_start,
	381	.next = dev_seq_next,
	382	.stop = dev_seq_stop,
	383	.show = dev_mc_seq_show,
	384	};
	385
	386	static int dev_mc_seq_open(struct inode inode, struct file file)
	387	{
	388	return seq_open_net(inode, file, &dev_mc_seq_ops,
	389	sizeof(struct seq_net_private));
	390	}
	391
	392	static const struct file_operations dev_mc_seq_fops = {
	393	.owner = THIS_MODULE,
	394	.open = dev_mc_seq_open,
	395	.read = seq_read,
	396	.llseek = seq_lseek,
	397	.release = seq_release_net,
	398	};
	399
	400	static int __net_init dev_mc_net_init(struct net *net)
	401	{
	402	if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops))
	403	return -ENOMEM;
	404	return 0;
	405	}
	406
	407	static void __net_exit dev_mc_net_exit(struct net *net)
	408	{
	409	remove_proc_entry("dev_mcast", net->proc_net);
	410	}
	411
	412	static struct pernet_operations __net_initdata dev_mc_net_ops = {
	413	.init = dev_mc_net_init,
	414	.exit = dev_mc_net_exit,
	415	};
	416
cd061574	417	int __init dev_proc_init(void)
900ff8c6	418	{
cd061574 CW	419	int ret = register_pernet_subsys(&dev_proc_ops);
	420	if (!ret)
	421	return register_pernet_subsys(&dev_mc_net_ops);
	422	return ret;
900ff8c6	423	}