[linux-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_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 */
		   0,	/* was 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) {
		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 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
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
	23	h = &net->dev_name_head[get_bucket(*pos)];
b67bfe0d	24	hlist_for_each_entry_rcu(dev, h, name_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
119	static struct softnet_data softnet_get_online(loff_t pos)
120	{
121	struct softnet_data *sd = NULL;
122
123	while (*pos < nr_cpu_ids)
124	if (cpu_online(*pos)) {
125	sd = &per_cpu(softnet_data, *pos);
126	break;
127	} else
128	++*pos;
129	return sd;
130	}
131
132	static void softnet_seq_start(struct seq_file seq, loff_t *pos)
133	{
134	return softnet_get_online(pos);
135	}
136
137	static void softnet_seq_next(struct seq_file seq, void v, loff_t pos)
138	{
139	++*pos;
140	return softnet_get_online(pos);
141	}
142
143	static void softnet_seq_stop(struct seq_file seq, void v)
144	{
145	}
146
147	static int softnet_seq_show(struct seq_file seq, void v)
148	{
149	struct softnet_data *sd = v;
99bbc707	150	unsigned int flow_limit_count = 0;
900ff8c6	151
99bbc707 WB	152	#ifdef CONFIG_NET_FLOW_LIMIT
	153	struct sd_flow_limit *fl;
	154
	155	rcu_read_lock();
	156	fl = rcu_dereference(sd->flow_limit);
	157	if (fl)
	158	flow_limit_count = fl->count;
	159	rcu_read_unlock();
	160	#endif
	161
	162	seq_printf(seq,
	163	"%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
900ff8c6 CW	164	sd->processed, sd->dropped, sd->time_squeeze, 0,
900ff8c6 CW	165	0, 0, 0, 0, /* was fastroute */
f0cdf76c FW	166	0, /* was cpu_collision */
f0cdf76c FW	167	sd->received_rps, flow_limit_count);
900ff8c6 CW	168	return 0;
	169	}
	170
	171	static const struct seq_operations dev_seq_ops = {
	172	.start = dev_seq_start,
	173	.next = dev_seq_next,
	174	.stop = dev_seq_stop,
	175	.show = dev_seq_show,
	176	};
	177
	178	static int dev_seq_open(struct inode inode, struct file file)
	179	{
	180	return seq_open_net(inode, file, &dev_seq_ops,
	181	sizeof(struct seq_net_private));
	182	}
	183
	184	static const struct file_operations dev_seq_fops = {
	185	.owner = THIS_MODULE,
	186	.open = dev_seq_open,
	187	.read = seq_read,
	188	.llseek = seq_lseek,
	189	.release = seq_release_net,
	190	};
	191
	192	static const struct seq_operations softnet_seq_ops = {
	193	.start = softnet_seq_start,
	194	.next = softnet_seq_next,
	195	.stop = softnet_seq_stop,
	196	.show = softnet_seq_show,
	197	};
	198
	199	static int softnet_seq_open(struct inode inode, struct file file)
	200	{
	201	return seq_open(file, &softnet_seq_ops);
	202	}
	203
	204	static const struct file_operations softnet_seq_fops = {
	205	.owner = THIS_MODULE,
	206	.open = softnet_seq_open,
	207	.read = seq_read,
	208	.llseek = seq_lseek,
	209	.release = seq_release,
	210	};
	211
	212	static void *ptype_get_idx(loff_t pos)
	213	{
	214	struct packet_type *pt = NULL;
	215	loff_t i = 0;
	216	int t;
	217
	218	list_for_each_entry_rcu(pt, &ptype_all, list) {
	219	if (i == pos)
	220	return pt;
	221	++i;
	222	}
	223
	224	for (t = 0; t < PTYPE_HASH_SIZE; t++) {
	225	list_for_each_entry_rcu(pt, &ptype_base[t], list) {
	226	if (i == pos)
	227	return pt;
	228	++i;
	229	}
	230	}
	231	return NULL;
232	}
233
234	static void ptype_seq_start(struct seq_file seq, loff_t *pos)
235	__acquires(RCU)
236	{
237	rcu_read_lock();
238	return pos ? ptype_get_idx(pos - 1) : SEQ_START_TOKEN;
239	}
240
241	static void ptype_seq_next(struct seq_file seq, void v, loff_t pos)
242	{
243	struct packet_type *pt;
244	struct list_head *nxt;
245	int hash;
246
247	++*pos;
248	if (v == SEQ_START_TOKEN)
249	return ptype_get_idx(0);
250
251	pt = v;
252	nxt = pt->list.next;
253	if (pt->type == htons(ETH_P_ALL)) {
254	if (nxt != &ptype_all)
255	goto found;
256	hash = 0;
257	nxt = ptype_base[0].next;
258	} else
259	hash = ntohs(pt->type) & PTYPE_HASH_MASK;
260
261	while (nxt == &ptype_base[hash]) {
262	if (++hash >= PTYPE_HASH_SIZE)
263	return NULL;
264	nxt = ptype_base[hash].next;
265	}
266	found:
267	return list_entry(nxt, struct packet_type, list);
268	}
269
270	static void ptype_seq_stop(struct seq_file seq, void v)
271	__releases(RCU)
272	{
273	rcu_read_unlock();
274	}
275
276	static int ptype_seq_show(struct seq_file seq, void v)
277	{
278	struct packet_type *pt = v;
279
280	if (v == SEQ_START_TOKEN)
281	seq_puts(seq, "Type Device Function\n");
282	else if (pt->dev == NULL \|\| dev_net(pt->dev) == seq_file_net(seq)) {
283	if (pt->type == htons(ETH_P_ALL))
284	seq_puts(seq, "ALL ");
285	else
286	seq_printf(seq, "%04x", ntohs(pt->type));
287
eaac5f3d	288	seq_printf(seq, " %-8s %pf\n",
900ff8c6 CW	289	pt->dev ? pt->dev->name : "", pt->func);
	290	}
	291
	292	return 0;
	293	}
	294
	295	static const struct seq_operations ptype_seq_ops = {
	296	.start = ptype_seq_start,
	297	.next = ptype_seq_next,
	298	.stop = ptype_seq_stop,
	299	.show = ptype_seq_show,
	300	};
	301
	302	static int ptype_seq_open(struct inode inode, struct file file)
	303	{
	304	return seq_open_net(inode, file, &ptype_seq_ops,
	305	sizeof(struct seq_net_private));
	306	}
	307
	308	static const struct file_operations ptype_seq_fops = {
	309	.owner = THIS_MODULE,
	310	.open = ptype_seq_open,
	311	.read = seq_read,
	312	.llseek = seq_lseek,
	313	.release = seq_release_net,
	314	};
	315
	316
	317	static int __net_init dev_proc_net_init(struct net *net)
	318	{
	319	int rc = -ENOMEM;
	320
	321	if (!proc_create("dev", S_IRUGO, net->proc_net, &dev_seq_fops))
	322	goto out;
	323	if (!proc_create("softnet_stat", S_IRUGO, net->proc_net,
	324	&softnet_seq_fops))
	325	goto out_dev;
	326	if (!proc_create("ptype", S_IRUGO, net->proc_net, &ptype_seq_fops))
	327	goto out_softnet;
	328
	329	if (wext_proc_init(net))
	330	goto out_ptype;
	331	rc = 0;
	332	out:
	333	return rc;
	334	out_ptype:
	335	remove_proc_entry("ptype", net->proc_net);
	336	out_softnet:
	337	remove_proc_entry("softnet_stat", net->proc_net);
	338	out_dev:
	339	remove_proc_entry("dev", net->proc_net);
	340	goto out;
	341	}
	342
	343	static void __net_exit dev_proc_net_exit(struct net *net)
	344	{
	345	wext_proc_exit(net);
	346
	347	remove_proc_entry("ptype", net->proc_net);
	348	remove_proc_entry("softnet_stat", net->proc_net);
	349	remove_proc_entry("dev", net->proc_net);
	350	}
	351
	352	static struct pernet_operations __net_initdata dev_proc_ops = {
353	.init = dev_proc_net_init,
354	.exit = dev_proc_net_exit,
355	};
356
900ff8c6 CW	357	static int dev_mc_seq_show(struct seq_file seq, void v)
	358	{
	359	struct netdev_hw_addr *ha;
	360	struct net_device *dev = v;
	361
	362	if (v == SEQ_START_TOKEN)
	363	return 0;
	364
	365	netif_addr_lock_bh(dev);
	366	netdev_for_each_mc_addr(ha, dev) {
fbd0ac60 JP	367	seq_printf(seq, "%-4d %-15s %-5d %-5d %*phN\n",
	368	dev->ifindex, dev->name,
	369	ha->refcount, ha->global_use,
	370	(int)dev->addr_len, ha->addr);
900ff8c6 CW	371	}
	372	netif_addr_unlock_bh(dev);
	373	return 0;
	374	}
	375
	376	static const struct seq_operations dev_mc_seq_ops = {
	377	.start = dev_seq_start,
	378	.next = dev_seq_next,
	379	.stop = dev_seq_stop,
	380	.show = dev_mc_seq_show,
	381	};
	382
	383	static int dev_mc_seq_open(struct inode inode, struct file file)
	384	{
	385	return seq_open_net(inode, file, &dev_mc_seq_ops,
	386	sizeof(struct seq_net_private));
	387	}
	388
	389	static const struct file_operations dev_mc_seq_fops = {
	390	.owner = THIS_MODULE,
	391	.open = dev_mc_seq_open,
	392	.read = seq_read,
	393	.llseek = seq_lseek,
	394	.release = seq_release_net,
	395	};
	396
	397	static int __net_init dev_mc_net_init(struct net *net)
	398	{
	399	if (!proc_create("dev_mcast", 0, net->proc_net, &dev_mc_seq_fops))
	400	return -ENOMEM;
	401	return 0;
	402	}
	403
	404	static void __net_exit dev_mc_net_exit(struct net *net)
	405	{
	406	remove_proc_entry("dev_mcast", net->proc_net);
	407	}
	408
	409	static struct pernet_operations __net_initdata dev_mc_net_ops = {
	410	.init = dev_mc_net_init,
	411	.exit = dev_mc_net_exit,
	412	};
	413
cd061574	414	int __init dev_proc_init(void)
900ff8c6	415	{
cd061574 CW	416	int ret = register_pernet_subsys(&dev_proc_ops);
	417	if (!ret)
	418	return register_pernet_subsys(&dev_mc_net_ops);
	419	return ret;
900ff8c6	420	}