[net-next-2.6.git] / net / atm / proc.c

/* net/atm/proc.c - ATM /proc interface
 *
 * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
 *
 * seq_file api usage by romieu@fr.zoreil.com
 *
 * Evaluating the efficiency of the whole thing if left as an exercise to
 * the reader.
 */

#include <linux/module.h> /* for EXPORT_SYMBOL */
#include <linux/string.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/errno.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/netdevice.h>
#include <linux/atmclip.h>
#include <linux/init.h> /* for __init */
#include <net/net_namespace.h>
#include <net/atmclip.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <asm/param.h> /* for HZ */
#include "resources.h"
#include "common.h" /* atm_proc_init prototype */
#include "signaling.h" /* to get sigd - ugly too */

static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
    loff_t *pos);

static const struct file_operations proc_atm_dev_ops = {
	.owner =	THIS_MODULE,
	.read =		proc_dev_atm_read,
};

static void add_stats(struct seq_file *seq, const char *aal,
  const struct k_atm_aal_stats *stats)
{
	seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
	    atomic_read(&stats->tx),atomic_read(&stats->tx_err),
	    atomic_read(&stats->rx),atomic_read(&stats->rx_err),
	    atomic_read(&stats->rx_drop));
}

static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
{
	int i;

	seq_printf(seq, "%3d %-8s", dev->number, dev->type);
	for (i = 0; i < ESI_LEN; i++)
		seq_printf(seq, "%02x", dev->esi[i]);
	seq_puts(seq, "  ");
	add_stats(seq, "0", &dev->stats.aal0);
	seq_puts(seq, "  ");
	add_stats(seq, "5", &dev->stats.aal5);
	seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
	seq_putc(seq, '\n');
}

struct vcc_state {
	int bucket;
	struct sock *sk;
	int family;
};

static inline int compare_family(struct sock *sk, int family)
{
	return !family || (sk->sk_family == family);
}

static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
{
	struct sock *sk = *sock;

	if (sk == (void *)1) {
		for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
			struct hlist_head *head = &vcc_hash[*bucket];

			sk = hlist_empty(head) ? NULL : __sk_head(head);
			if (sk)
				break;
		}
		l--;
	}
try_again:
	for (; sk; sk = sk_next(sk)) {
		l -= compare_family(sk, family);
		if (l < 0)
			goto out;
	}
	if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
		sk = sk_head(&vcc_hash[*bucket]);
		goto try_again;
	}
	sk = (void *)1;
out:
	*sock = sk;
	return (l < 0);
}

static inline void *vcc_walk(struct vcc_state *state, loff_t l)
{
	return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
	       state : NULL;
}

static int __vcc_seq_open(struct inode *inode, struct file *file,
	int family, const struct seq_operations *ops)
{
	struct vcc_state *state;
	struct seq_file *seq;
	int rc = -ENOMEM;

	state = kmalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		goto out;

	rc = seq_open(file, ops);
	if (rc)
		goto out_kfree;

	state->family = family;

	seq = file->private_data;
	seq->private = state;
out:
	return rc;
out_kfree:
	kfree(state);
	goto out;
}

static int vcc_seq_release(struct inode *inode, struct file *file)
{
	return seq_release_private(inode, file);
}

static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct vcc_state *state = seq->private;
	loff_t left = *pos;

	read_lock(&vcc_sklist_lock);
	state->sk = (void *)1;
	return left ? vcc_walk(state, left) : (void *)1;
}

static void vcc_seq_stop(struct seq_file *seq, void *v)
{
	read_unlock(&vcc_sklist_lock);
}

static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct vcc_state *state = seq->private;

	v = vcc_walk(state, 1);
	*pos += !!PTR_ERR(v);
	return v;
}

static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
{
	static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
	static const char *aal_name[] = {
		"---",	"1",	"2",	"3/4",	/*  0- 3 */
		"???",	"5",	"???",	"???",	/*  4- 7 */
		"???",	"???",	"???",	"???",	/*  8-11 */
		"???",	"0",	"???",	"???"};	/* 12-15 */

	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
	    vcc->dev->number,vcc->vpi,vcc->vci,
	    vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
	    aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
	    class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
	    class_name[vcc->qos.txtp.traffic_class]);
	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
		struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
		struct net_device *dev;

		dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
		seq_printf(seq, "CLIP, Itf:%s, Encap:",
		    dev ? dev->name : "none?");
		seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	}
	seq_putc(seq, '\n');
}

static const char *vcc_state(struct atm_vcc *vcc)
{
	static const char *map[] = { ATM_VS2TXT_MAP };

	return map[ATM_VF2VS(vcc->flags)];
}

static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
{
	struct sock *sk = sk_atm(vcc);

	seq_printf(seq, "%p ", vcc);
	if (!vcc->dev)
		seq_printf(seq, "Unassigned    ");
	else
		seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
			vcc->vci);
	switch (sk->sk_family) {
		case AF_ATMPVC:
			seq_printf(seq, "PVC");
			break;
		case AF_ATMSVC:
			seq_printf(seq, "SVC");
			break;
		default:
			seq_printf(seq, "%3d", sk->sk_family);
	}
	seq_printf(seq, " %04lx  %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
		  atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
		  atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
		  atomic_read(&sk->sk_refcnt));
}

static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
{
	if (!vcc->dev)
		seq_printf(seq, sizeof(void *) == 4 ?
			   "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
	else
		seq_printf(seq, "%3d %3d %5d         ",
			   vcc->dev->number, vcc->vpi, vcc->vci);
	seq_printf(seq, "%-10s ", vcc_state(vcc));
	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	    *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
	if (*vcc->remote.sas_addr.prv) {
		int i;

		for (i = 0; i < ATM_ESA_LEN; i++)
			seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	}
	seq_putc(seq, '\n');
}

static int atm_dev_seq_show(struct seq_file *seq, void *v)
{
	static char atm_dev_banner[] =
		"Itf Type    ESI/\"MAC\"addr "
		"AAL(TX,err,RX,err,drop) ...               [refcnt]\n";

	if (v == (void *)1)
		seq_puts(seq, atm_dev_banner);
	else {
		struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);

		atm_dev_info(seq, dev);
	}
	return 0;
}

static const struct seq_operations atm_dev_seq_ops = {
	.start	= atm_dev_seq_start,
	.next	= atm_dev_seq_next,
	.stop	= atm_dev_seq_stop,
	.show	= atm_dev_seq_show,
};

static int atm_dev_seq_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &atm_dev_seq_ops);
}

static const struct file_operations devices_seq_fops = {
	.open		= atm_dev_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int pvc_seq_show(struct seq_file *seq, void *v)
{
	static char atm_pvc_banner[] =
		"Itf VPI VCI   AAL RX(PCR,Class) TX(PCR,Class)\n";

	if (v == (void *)1)
		seq_puts(seq, atm_pvc_banner);
	else {
		struct vcc_state *state = seq->private;
		struct atm_vcc *vcc = atm_sk(state->sk);

		pvc_info(seq, vcc);
	}
	return 0;
}

static const struct seq_operations pvc_seq_ops = {
	.start	= vcc_seq_start,
	.next	= vcc_seq_next,
	.stop	= vcc_seq_stop,
	.show	= pvc_seq_show,
};

static int pvc_seq_open(struct inode *inode, struct file *file)
{
	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
}

static const struct file_operations pvc_seq_fops = {
	.open		= pvc_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= vcc_seq_release,
};

static int vcc_seq_show(struct seq_file *seq, void *v)
{
	if (v == (void *)1) {
		seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
			"Address ", "Itf VPI VCI   Fam Flags Reply "
			"Send buffer     Recv buffer      [refcnt]\n");
	} else {
		struct vcc_state *state = seq->private;
		struct atm_vcc *vcc = atm_sk(state->sk);

		vcc_info(seq, vcc);
	}
	return 0;
}

static const struct seq_operations vcc_seq_ops = {
	.start	= vcc_seq_start,
	.next	= vcc_seq_next,
	.stop	= vcc_seq_stop,
	.show	= vcc_seq_show,
};

static int vcc_seq_open(struct inode *inode, struct file *file)
{
	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
}

static const struct file_operations vcc_seq_fops = {
	.open		= vcc_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= vcc_seq_release,
};

static int svc_seq_show(struct seq_file *seq, void *v)
{
	static char atm_svc_banner[] =
		"Itf VPI VCI           State      Remote\n";

	if (v == (void *)1)
		seq_puts(seq, atm_svc_banner);
	else {
		struct vcc_state *state = seq->private;
		struct atm_vcc *vcc = atm_sk(state->sk);

		svc_info(seq, vcc);
	}
	return 0;
}

static const struct seq_operations svc_seq_ops = {
	.start	= vcc_seq_start,
	.next	= vcc_seq_next,
	.stop	= vcc_seq_stop,
	.show	= svc_seq_show,
};

static int svc_seq_open(struct inode *inode, struct file *file)
{
	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
}

static const struct file_operations svc_seq_fops = {
	.open		= svc_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= vcc_seq_release,
};

static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
				 size_t count, loff_t *pos)
{
	struct atm_dev *dev;
	unsigned long page;
	int length;

	if (count == 0) return 0;
	page = get_zeroed_page(GFP_KERNEL);
	if (!page) return -ENOMEM;
	dev = PDE(file->f_path.dentry->d_inode)->data;
	if (!dev->ops->proc_read)
		length = -EINVAL;
	else {
		length = dev->ops->proc_read(dev,pos,(char *) page);
		if (length > count) length = -EINVAL;
	}
	if (length >= 0) {
		if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
		(*pos)++;
	}
	free_page(page);
	return length;
}


struct proc_dir_entry *atm_proc_root;
EXPORT_SYMBOL(atm_proc_root);


int atm_proc_dev_register(struct atm_dev *dev)
{
	int digits,num;
	int error;

	/* No proc info */
	if (!dev->ops->proc_read)
		return 0;

	error = -ENOMEM;
	digits = 0;
	for (num = dev->number; num; num /= 10) digits++;
	if (!digits) digits++;

	dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
	if (!dev->proc_name)
		goto err_out;
	sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);

	dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
	if (!dev->proc_entry)
		goto err_free_name;
	dev->proc_entry->data = dev;
	dev->proc_entry->proc_fops = &proc_atm_dev_ops;
	dev->proc_entry->owner = THIS_MODULE;
	return 0;
err_free_name:
	kfree(dev->proc_name);
err_out:
	return error;
}


void atm_proc_dev_deregister(struct atm_dev *dev)
{
	if (!dev->ops->proc_read)
		return;

	remove_proc_entry(dev->proc_name, atm_proc_root);
	kfree(dev->proc_name);
}

static struct atm_proc_entry {
	char *name;
	const struct file_operations *proc_fops;
	struct proc_dir_entry *dirent;
} atm_proc_ents[] = {
	{ .name = "devices",	.proc_fops = &devices_seq_fops },
	{ .name = "pvc",	.proc_fops = &pvc_seq_fops },
	{ .name = "svc",	.proc_fops = &svc_seq_fops },
	{ .name = "vc",		.proc_fops = &vcc_seq_fops },
	{ .name = NULL,		.proc_fops = NULL }
};

static void atm_proc_dirs_remove(void)
{
	static struct atm_proc_entry *e;

	for (e = atm_proc_ents; e->name; e++) {
		if (e->dirent)
			remove_proc_entry(e->name, atm_proc_root);
	}
	remove_proc_entry("atm", init_net.proc_net);
}

int __init atm_proc_init(void)
{
	static struct atm_proc_entry *e;
	int ret;

	atm_proc_root = proc_mkdir("atm", init_net.proc_net);
	if (!atm_proc_root)
		goto err_out;
	for (e = atm_proc_ents; e->name; e++) {
		struct proc_dir_entry *dirent;

		dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
		if (!dirent)
			goto err_out_remove;
		dirent->proc_fops = e->proc_fops;
		dirent->owner = THIS_MODULE;
		e->dirent = dirent;
	}
	ret = 0;
out:
	return ret;

err_out_remove:
	atm_proc_dirs_remove();
err_out:
	ret = -ENOMEM;
	goto out;
}

void atm_proc_exit(void)
{
	atm_proc_dirs_remove();
}
Commit	Line	Data
1da177e4 LT	1	/* net/atm/proc.c - ATM /proc interface
	2	*
	3	* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
	4	*
	5	* seq_file api usage by romieu@fr.zoreil.com
	6	*
	7	* Evaluating the efficiency of the whole thing if left as an exercise to
	8	* the reader.
	9	*/
	10
1da177e4 LT	11	#include <linux/module.h> /* for EXPORT_SYMBOL */
	12	#include <linux/string.h>
	13	#include <linux/types.h>
	14	#include <linux/mm.h>
	15	#include <linux/fs.h>
	16	#include <linux/stat.h>
	17	#include <linux/proc_fs.h>
	18	#include <linux/seq_file.h>
	19	#include <linux/errno.h>
	20	#include <linux/atm.h>
	21	#include <linux/atmdev.h>
	22	#include <linux/netdevice.h>
	23	#include <linux/atmclip.h>
	24	#include <linux/init.h> /* for __init */
457c4cbc	25	#include <net/net_namespace.h>
1da177e4 LT	26	#include <net/atmclip.h>
	27	#include <asm/uaccess.h>
	28	#include <asm/atomic.h>
	29	#include <asm/param.h> /* for HZ */
	30	#include "resources.h"
	31	#include "common.h" /* atm_proc_init prototype */
	32	#include "signaling.h" /* to get sigd - ugly too */
	33
	34	static ssize_t proc_dev_atm_read(struct file file,char __user buf,size_t count,
	35	loff_t *pos);
	36
9a32144e	37	static const struct file_operations proc_atm_dev_ops = {
1da177e4 LT	38	.owner = THIS_MODULE,
	39	.read = proc_dev_atm_read,
	40	};
	41
	42	static void add_stats(struct seq_file seq, const char aal,
	43	const struct k_atm_aal_stats *stats)
	44	{
	45	seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
	46	atomic_read(&stats->tx),atomic_read(&stats->tx_err),
	47	atomic_read(&stats->rx),atomic_read(&stats->rx_err),
	48	atomic_read(&stats->rx_drop));
	49	}
	50
	51	static void atm_dev_info(struct seq_file seq, const struct atm_dev dev)
	52	{
	53	int i;
	54
	55	seq_printf(seq, "%3d %-8s", dev->number, dev->type);
	56	for (i = 0; i < ESI_LEN; i++)
	57	seq_printf(seq, "%02x", dev->esi[i]);
	58	seq_puts(seq, " ");
	59	add_stats(seq, "0", &dev->stats.aal0);
	60	seq_puts(seq, " ");
	61	add_stats(seq, "5", &dev->stats.aal5);
	62	seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
	63	seq_putc(seq, '\n');
	64	}
	65
	66	struct vcc_state {
	67	int bucket;
	68	struct sock *sk;
	69	int family;
	70	};
	71
	72	static inline int compare_family(struct sock *sk, int family)
	73	{
	74	return !family \|\| (sk->sk_family == family);
	75	}
	76
	77	static int __vcc_walk(struct sock *sock, int family, int bucket, loff_t l)
	78	{
	79	struct sock sk = sock;
	80
	81	if (sk == (void *)1) {
	82	for (bucket = 0; bucket < VCC_HTABLE_SIZE; ++*bucket) {
	83	struct hlist_head head = &vcc_hash[bucket];
	84
	85	sk = hlist_empty(head) ? NULL : __sk_head(head);
	86	if (sk)
	87	break;
	88	}
	89	l--;
f7d57453	90	}
1da177e4 LT	91	try_again:
	92	for (; sk; sk = sk_next(sk)) {
	93	l -= compare_family(sk, family);
	94	if (l < 0)
	95	goto out;
	96	}
	97	if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
	98	sk = sk_head(&vcc_hash[*bucket]);
	99	goto try_again;
	100	}
	101	sk = (void *)1;
	102	out:
	103	*sock = sk;
	104	return (l < 0);
	105	}
	106
	107	static inline void vcc_walk(struct vcc_state state, loff_t l)
	108	{
	109	return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
	110	state : NULL;
	111	}
	112
	113	static int __vcc_seq_open(struct inode inode, struct file file,
ececfdee	114	int family, const struct seq_operations *ops)
1da177e4 LT	115	{
	116	struct vcc_state *state;
	117	struct seq_file *seq;
	118	int rc = -ENOMEM;
	119
	120	state = kmalloc(sizeof(*state), GFP_KERNEL);
	121	if (!state)
	122	goto out;
	123
	124	rc = seq_open(file, ops);
	125	if (rc)
	126	goto out_kfree;
	127
	128	state->family = family;
	129
	130	seq = file->private_data;
	131	seq->private = state;
	132	out:
	133	return rc;
	134	out_kfree:
	135	kfree(state);
	136	goto out;
	137	}
	138
	139	static int vcc_seq_release(struct inode inode, struct file file)
	140	{
	141	return seq_release_private(inode, file);
	142	}
	143
	144	static void vcc_seq_start(struct seq_file seq, loff_t *pos)
	145	{
	146	struct vcc_state *state = seq->private;
	147	loff_t left = *pos;
	148
	149	read_lock(&vcc_sklist_lock);
	150	state->sk = (void *)1;
	151	return left ? vcc_walk(state, left) : (void *)1;
	152	}
	153
	154	static void vcc_seq_stop(struct seq_file seq, void v)
	155	{
	156	read_unlock(&vcc_sklist_lock);
	157	}
	158
	159	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	160	{
	161	struct vcc_state *state = seq->private;
	162
	163	v = vcc_walk(state, 1);
	164	*pos += !!PTR_ERR(v);
	165	return v;
	166	}
	167
	168	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	169	{
	170	static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
	171	static const char *aal_name[] = {
	172	"---", "1", "2", "3/4", /* 0- 3 */
	173	"???", "5", "???", "???", /* 4- 7 */
	174	"???", "???", "???", "???", /* 8-11 */
	175	"???", "0", "???", "???"}; /* 12-15 */
	176
	177	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
	178	vcc->dev->number,vcc->vpi,vcc->vci,
179	vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
180	aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
181	class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
182	class_name[vcc->qos.txtp.traffic_class]);
183	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
184	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
185	struct net_device *dev;
186
187	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
188	seq_printf(seq, "CLIP, Itf:%s, Encap:",
189	dev ? dev->name : "none?");
190	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
191	}
192	seq_putc(seq, '\n');
193	}
194
195	static const char vcc_state(struct atm_vcc vcc)
196	{
197	static const char *map[] = { ATM_VS2TXT_MAP };
198
199	return map[ATM_VF2VS(vcc->flags)];
200	}
201
202	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
203	{
204	struct sock *sk = sk_atm(vcc);
205
206	seq_printf(seq, "%p ", vcc);
207	if (!vcc->dev)
208	seq_printf(seq, "Unassigned ");
f7d57453	209	else
1da177e4 LT	210	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	211	vcc->vci);
	212	switch (sk->sk_family) {
	213	case AF_ATMPVC:
	214	seq_printf(seq, "PVC");
	215	break;
	216	case AF_ATMSVC:
	217	seq_printf(seq, "SVC");
	218	break;
	219	default:
	220	seq_printf(seq, "%3d", sk->sk_family);
	221	}
	222	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
	223	atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
	224	atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
	225	atomic_read(&sk->sk_refcnt));
	226	}
	227
	228	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	229	{
	230	if (!vcc->dev)
	231	seq_printf(seq, sizeof(void *) == 4 ?
	232	"N/A@%p%10s" : "N/A@%p%2s", vcc, "");
	233	else
	234	seq_printf(seq, "%3d %3d %5d ",
	235	vcc->dev->number, vcc->vpi, vcc->vci);
	236	seq_printf(seq, "%-10s ", vcc_state(vcc));
	237	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	238	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	239	if (*vcc->remote.sas_addr.prv) {
	240	int i;
	241
	242	for (i = 0; i < ATM_ESA_LEN; i++)
	243	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	244	}
	245	seq_putc(seq, '\n');
	246	}
	247
	248	static int atm_dev_seq_show(struct seq_file seq, void v)
	249	{
	250	static char atm_dev_banner[] =
	251	"Itf Type ESI/\"MAC\"addr "
	252	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	253
1da177e4 LT	254	if (v == (void *)1)
	255	seq_puts(seq, atm_dev_banner);
	256	else {
	257	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	258
	259	atm_dev_info(seq, dev);
	260	}
f7d57453	261	return 0;
1da177e4	262	}
f7d57453	263
56b3d975	264	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	265	.start = atm_dev_seq_start,
	266	.next = atm_dev_seq_next,
	267	.stop = atm_dev_seq_stop,
	268	.show = atm_dev_seq_show,
	269	};
f7d57453	270
1da177e4 LT	271	static int atm_dev_seq_open(struct inode inode, struct file file)
	272	{
	273	return seq_open(file, &atm_dev_seq_ops);
	274	}
f7d57453	275
9a32144e	276	static const struct file_operations devices_seq_fops = {
1da177e4 LT	277	.open = atm_dev_seq_open,
	278	.read = seq_read,
	279	.llseek = seq_lseek,
	280	.release = seq_release,
	281	};
	282
	283	static int pvc_seq_show(struct seq_file seq, void v)
	284	{
f7d57453	285	static char atm_pvc_banner[] =
1da177e4 LT	286	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
	287
	288	if (v == (void *)1)
	289	seq_puts(seq, atm_pvc_banner);
	290	else {
	291	struct vcc_state *state = seq->private;
	292	struct atm_vcc *vcc = atm_sk(state->sk);
	293
	294	pvc_info(seq, vcc);
	295	}
	296	return 0;
	297	}
	298
56b3d975	299	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	300	.start = vcc_seq_start,
	301	.next = vcc_seq_next,
	302	.stop = vcc_seq_stop,
	303	.show = pvc_seq_show,
	304	};
	305
	306	static int pvc_seq_open(struct inode inode, struct file file)
	307	{
	308	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	309	}
	310
9a32144e	311	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	312	.open = pvc_seq_open,
	313	.read = seq_read,
	314	.llseek = seq_lseek,
	315	.release = vcc_seq_release,
	316	};
	317
	318	static int vcc_seq_show(struct seq_file seq, void v)
	319	{
f7d57453 YH	320	if (v == (void *)1) {
	321	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	322	"Address ", "Itf VPI VCI Fam Flags Reply "
	323	"Send buffer Recv buffer [refcnt]\n");
	324	} else {
	325	struct vcc_state *state = seq->private;
	326	struct atm_vcc *vcc = atm_sk(state->sk);
	327
	328	vcc_info(seq, vcc);
	329	}
	330	return 0;
1da177e4	331	}
f7d57453	332
56b3d975	333	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	334	.start = vcc_seq_start,
	335	.next = vcc_seq_next,
	336	.stop = vcc_seq_stop,
	337	.show = vcc_seq_show,
1da177e4	338	};
f7d57453	339
1da177e4 LT	340	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	341	{
f7d57453	342	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	343	}
f7d57453	344
9a32144e	345	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	346	.open = vcc_seq_open,
	347	.read = seq_read,
	348	.llseek = seq_lseek,
	349	.release = vcc_seq_release,
	350	};
	351
	352	static int svc_seq_show(struct seq_file seq, void v)
	353	{
f7d57453	354	static char atm_svc_banner[] =
1da177e4 LT	355	"Itf VPI VCI State Remote\n";
	356
	357	if (v == (void *)1)
	358	seq_puts(seq, atm_svc_banner);
	359	else {
	360	struct vcc_state *state = seq->private;
	361	struct atm_vcc *vcc = atm_sk(state->sk);
	362
	363	svc_info(seq, vcc);
	364	}
	365	return 0;
	366	}
	367
56b3d975	368	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	369	.start = vcc_seq_start,
	370	.next = vcc_seq_next,
	371	.stop = vcc_seq_stop,
	372	.show = svc_seq_show,
	373	};
	374
	375	static int svc_seq_open(struct inode inode, struct file file)
	376	{
	377	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	378	}
	379
9a32144e	380	static const struct file_operations svc_seq_fops = {
1da177e4 LT	381	.open = svc_seq_open,
	382	.read = seq_read,
	383	.llseek = seq_lseek,
	384	.release = vcc_seq_release,
	385	};
	386
	387	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	388	size_t count, loff_t *pos)
	389	{
	390	struct atm_dev *dev;
	391	unsigned long page;
	392	int length;
	393
	394	if (count == 0) return 0;
	395	page = get_zeroed_page(GFP_KERNEL);
	396	if (!page) return -ENOMEM;
76a0f174	397	dev = PDE(file->f_path.dentry->d_inode)->data;
1da177e4 LT	398	if (!dev->ops->proc_read)
	399	length = -EINVAL;
	400	else {
	401	length = dev->ops->proc_read(dev,pos,(char *) page);
	402	if (length > count) length = -EINVAL;
	403	}
	404	if (length >= 0) {
	405	if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
	406	(*pos)++;
	407	}
	408	free_page(page);
	409	return length;
	410	}
	411
	412
	413	struct proc_dir_entry *atm_proc_root;
	414	EXPORT_SYMBOL(atm_proc_root);
	415
	416
	417	int atm_proc_dev_register(struct atm_dev *dev)
	418	{
	419	int digits,num;
	420	int error;
	421
	422	/* No proc info */
	423	if (!dev->ops->proc_read)
	424	return 0;
	425
	426	error = -ENOMEM;
	427	digits = 0;
	428	for (num = dev->number; num; num /= 10) digits++;
	429	if (!digits) digits++;
	430
	431	dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
	432	if (!dev->proc_name)
	433	goto err_out;
	434	sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
	435
	436	dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
	437	if (!dev->proc_entry)
	438	goto err_free_name;
	439	dev->proc_entry->data = dev;
	440	dev->proc_entry->proc_fops = &proc_atm_dev_ops;
	441	dev->proc_entry->owner = THIS_MODULE;
	442	return 0;
	443	err_free_name:
	444	kfree(dev->proc_name);
	445	err_out:
	446	return error;
	447	}
	448
	449
	450	void atm_proc_dev_deregister(struct atm_dev *dev)
	451	{
	452	if (!dev->ops->proc_read)
	453	return;
	454
	455	remove_proc_entry(dev->proc_name, atm_proc_root);
	456	kfree(dev->proc_name);
	457	}
	458
	459	static struct atm_proc_entry {
	460	char *name;
9a32144e	461	const struct file_operations *proc_fops;
1da177e4 LT	462	struct proc_dir_entry *dirent;
	463	} atm_proc_ents[] = {
	464	{ .name = "devices", .proc_fops = &devices_seq_fops },
	465	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	466	{ .name = "svc", .proc_fops = &svc_seq_fops },
	467	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	468	{ .name = NULL, .proc_fops = NULL }
	469	};
	470
	471	static void atm_proc_dirs_remove(void)
	472	{
	473	static struct atm_proc_entry *e;
	474
	475	for (e = atm_proc_ents; e->name; e++) {
f7d57453	476	if (e->dirent)
1da177e4 LT	477	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	478	}
457c4cbc	479	remove_proc_entry("atm", init_net.proc_net);
1da177e4 LT	480	}
	481
	482	int __init atm_proc_init(void)
	483	{
	484	static struct atm_proc_entry *e;
	485	int ret;
	486
457c4cbc	487	atm_proc_root = proc_mkdir("atm", init_net.proc_net);
1da177e4 LT	488	if (!atm_proc_root)
	489	goto err_out;
	490	for (e = atm_proc_ents; e->name; e++) {
	491	struct proc_dir_entry *dirent;
	492
	493	dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
	494	if (!dirent)
	495	goto err_out_remove;
	496	dirent->proc_fops = e->proc_fops;
	497	dirent->owner = THIS_MODULE;
	498	e->dirent = dirent;
	499	}
	500	ret = 0;
	501	out:
	502	return ret;
	503
	504	err_out_remove:
	505	atm_proc_dirs_remove();
	506	err_out:
	507	ret = -ENOMEM;
	508	goto out;
	509	}
	510
b9c6e3e9	511	void atm_proc_exit(void)
1da177e4 LT	512	{
	513	atm_proc_dirs_remove();
	514	}