[deliverable/linux.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;

	state = __seq_open_private(file, ops, sizeof(*state));
	if (state == NULL)
		return -ENOMEM;

	state->family = family;
	return 0;
}

static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(vcc_sklist_lock)
{
	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)
	__releases(vcc_sklist_lock)
{
	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 >= ARRAY_SIZE(aal_name) ? "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	= seq_release_private,
};

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	= seq_release_private,
};

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	= seq_release_private,
};

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 = proc_create(dev->proc_name, 0, atm_proc_root,
				      &proc_atm_dev_ops);
	if (!dev->proc_entry)
		goto err_free_name;
	dev->proc_entry->data = dev;
	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);
	}
	proc_net_remove(&init_net, "atm");
}

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

	atm_proc_root = proc_net_mkdir(&init_net, "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 = proc_create(e->name, S_IRUGO,
				     atm_proc_root, e->proc_fops);
		if (!dirent)
			goto err_out_remove;
		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	{
1da177e4 LT	116	struct vcc_state *state;
1da177e4	117
9a8c09e7 PE	118	state = __seq_open_private(file, ops, sizeof(*state));
	119	if (state == NULL)
	120	return -ENOMEM;
1da177e4 LT	121
1da177e4 LT	122	state->family = family;
9a8c09e7	123	return 0;
1da177e4 LT	124	}
	125
	126	static void vcc_seq_start(struct seq_file seq, loff_t *pos)
5c17d5f1	127	__acquires(vcc_sklist_lock)
1da177e4 LT	128	{
	129	struct vcc_state *state = seq->private;
	130	loff_t left = *pos;
	131
	132	read_lock(&vcc_sklist_lock);
	133	state->sk = (void *)1;
	134	return left ? vcc_walk(state, left) : (void *)1;
	135	}
	136
	137	static void vcc_seq_stop(struct seq_file seq, void v)
5c17d5f1	138	__releases(vcc_sklist_lock)
1da177e4 LT	139	{
	140	read_unlock(&vcc_sklist_lock);
	141	}
	142
	143	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	144	{
	145	struct vcc_state *state = seq->private;
	146
	147	v = vcc_walk(state, 1);
	148	*pos += !!PTR_ERR(v);
	149	return v;
	150	}
	151
	152	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	153	{
	154	static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
	155	static const char *aal_name[] = {
	156	"---", "1", "2", "3/4", /* 0- 3 */
	157	"???", "5", "???", "???", /* 4- 7 */
	158	"???", "???", "???", "???", /* 8-11 */
	159	"???", "0", "???", "???"}; /* 12-15 */
	160
	161	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
	162	vcc->dev->number,vcc->vpi,vcc->vci,
8b14a536	163	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
1da177e4 LT	164	aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
	165	class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
	166	class_name[vcc->qos.txtp.traffic_class]);
	167	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	168	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	169	struct net_device *dev;
	170
	171	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	172	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	173	dev ? dev->name : "none?");
	174	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	175	}
	176	seq_putc(seq, '\n');
	177	}
	178
	179	static const char vcc_state(struct atm_vcc vcc)
	180	{
	181	static const char *map[] = { ATM_VS2TXT_MAP };
	182
	183	return map[ATM_VF2VS(vcc->flags)];
	184	}
	185
	186	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	187	{
	188	struct sock *sk = sk_atm(vcc);
	189
	190	seq_printf(seq, "%p ", vcc);
	191	if (!vcc->dev)
	192	seq_printf(seq, "Unassigned ");
f7d57453	193	else
1da177e4 LT	194	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	195	vcc->vci);
	196	switch (sk->sk_family) {
	197	case AF_ATMPVC:
	198	seq_printf(seq, "PVC");
	199	break;
	200	case AF_ATMSVC:
	201	seq_printf(seq, "SVC");
	202	break;
	203	default:
	204	seq_printf(seq, "%3d", sk->sk_family);
	205	}
	206	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
	207	atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
	208	atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
	209	atomic_read(&sk->sk_refcnt));
	210	}
	211
	212	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	213	{
	214	if (!vcc->dev)
	215	seq_printf(seq, sizeof(void *) == 4 ?
	216	"N/A@%p%10s" : "N/A@%p%2s", vcc, "");
	217	else
	218	seq_printf(seq, "%3d %3d %5d ",
	219	vcc->dev->number, vcc->vpi, vcc->vci);
	220	seq_printf(seq, "%-10s ", vcc_state(vcc));
	221	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	222	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	223	if (*vcc->remote.sas_addr.prv) {
	224	int i;
	225
	226	for (i = 0; i < ATM_ESA_LEN; i++)
	227	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	228	}
	229	seq_putc(seq, '\n');
	230	}
	231
	232	static int atm_dev_seq_show(struct seq_file seq, void v)
	233	{
	234	static char atm_dev_banner[] =
	235	"Itf Type ESI/\"MAC\"addr "
	236	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	237
1da177e4 LT	238	if (v == (void *)1)
	239	seq_puts(seq, atm_dev_banner);
	240	else {
	241	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	242
	243	atm_dev_info(seq, dev);
	244	}
f7d57453	245	return 0;
1da177e4	246	}
f7d57453	247
56b3d975	248	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	249	.start = atm_dev_seq_start,
	250	.next = atm_dev_seq_next,
	251	.stop = atm_dev_seq_stop,
	252	.show = atm_dev_seq_show,
	253	};
f7d57453	254
1da177e4 LT	255	static int atm_dev_seq_open(struct inode inode, struct file file)
	256	{
	257	return seq_open(file, &atm_dev_seq_ops);
	258	}
f7d57453	259
9a32144e	260	static const struct file_operations devices_seq_fops = {
1da177e4 LT	261	.open = atm_dev_seq_open,
	262	.read = seq_read,
	263	.llseek = seq_lseek,
	264	.release = seq_release,
	265	};
	266
	267	static int pvc_seq_show(struct seq_file seq, void v)
	268	{
f7d57453	269	static char atm_pvc_banner[] =
1da177e4 LT	270	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
	271
	272	if (v == (void *)1)
	273	seq_puts(seq, atm_pvc_banner);
	274	else {
	275	struct vcc_state *state = seq->private;
	276	struct atm_vcc *vcc = atm_sk(state->sk);
	277
	278	pvc_info(seq, vcc);
	279	}
	280	return 0;
	281	}
	282
56b3d975	283	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	284	.start = vcc_seq_start,
	285	.next = vcc_seq_next,
	286	.stop = vcc_seq_stop,
	287	.show = pvc_seq_show,
	288	};
	289
	290	static int pvc_seq_open(struct inode inode, struct file file)
	291	{
	292	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	293	}
	294
9a32144e	295	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	296	.open = pvc_seq_open,
	297	.read = seq_read,
	298	.llseek = seq_lseek,
9a8c09e7	299	.release = seq_release_private,
1da177e4 LT	300	};
	301
	302	static int vcc_seq_show(struct seq_file seq, void v)
	303	{
f7d57453 YH	304	if (v == (void *)1) {
	305	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	306	"Address ", "Itf VPI VCI Fam Flags Reply "
	307	"Send buffer Recv buffer [refcnt]\n");
	308	} else {
	309	struct vcc_state *state = seq->private;
	310	struct atm_vcc *vcc = atm_sk(state->sk);
	311
	312	vcc_info(seq, vcc);
	313	}
	314	return 0;
1da177e4	315	}
f7d57453	316
56b3d975	317	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	318	.start = vcc_seq_start,
	319	.next = vcc_seq_next,
	320	.stop = vcc_seq_stop,
	321	.show = vcc_seq_show,
1da177e4	322	};
f7d57453	323
1da177e4 LT	324	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	325	{
f7d57453	326	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	327	}
f7d57453	328
9a32144e	329	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	330	.open = vcc_seq_open,
	331	.read = seq_read,
	332	.llseek = seq_lseek,
9a8c09e7	333	.release = seq_release_private,
1da177e4 LT	334	};
	335
	336	static int svc_seq_show(struct seq_file seq, void v)
	337	{
f7d57453	338	static char atm_svc_banner[] =
1da177e4 LT	339	"Itf VPI VCI State Remote\n";
	340
	341	if (v == (void *)1)
	342	seq_puts(seq, atm_svc_banner);
	343	else {
	344	struct vcc_state *state = seq->private;
	345	struct atm_vcc *vcc = atm_sk(state->sk);
	346
	347	svc_info(seq, vcc);
	348	}
	349	return 0;
	350	}
	351
56b3d975	352	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	353	.start = vcc_seq_start,
	354	.next = vcc_seq_next,
	355	.stop = vcc_seq_stop,
	356	.show = svc_seq_show,
	357	};
	358
	359	static int svc_seq_open(struct inode inode, struct file file)
	360	{
	361	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	362	}
	363
9a32144e	364	static const struct file_operations svc_seq_fops = {
1da177e4 LT	365	.open = svc_seq_open,
	366	.read = seq_read,
	367	.llseek = seq_lseek,
9a8c09e7	368	.release = seq_release_private,
1da177e4 LT	369	};
	370
	371	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	372	size_t count, loff_t *pos)
	373	{
	374	struct atm_dev *dev;
	375	unsigned long page;
	376	int length;
	377
	378	if (count == 0) return 0;
	379	page = get_zeroed_page(GFP_KERNEL);
	380	if (!page) return -ENOMEM;
76a0f174	381	dev = PDE(file->f_path.dentry->d_inode)->data;
1da177e4 LT	382	if (!dev->ops->proc_read)
	383	length = -EINVAL;
	384	else {
	385	length = dev->ops->proc_read(dev,pos,(char *) page);
	386	if (length > count) length = -EINVAL;
	387	}
	388	if (length >= 0) {
	389	if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
	390	(*pos)++;
	391	}
	392	free_page(page);
	393	return length;
	394	}
	395
	396
	397	struct proc_dir_entry *atm_proc_root;
	398	EXPORT_SYMBOL(atm_proc_root);
	399
	400
	401	int atm_proc_dev_register(struct atm_dev *dev)
	402	{
	403	int digits,num;
	404	int error;
	405
	406	/* No proc info */
	407	if (!dev->ops->proc_read)
	408	return 0;
	409
	410	error = -ENOMEM;
	411	digits = 0;
	412	for (num = dev->number; num; num /= 10) digits++;
	413	if (!digits) digits++;
	414
	415	dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
	416	if (!dev->proc_name)
	417	goto err_out;
	418	sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
	419
16e297b3 WC	420	dev->proc_entry = proc_create(dev->proc_name, 0, atm_proc_root,
16e297b3 WC	421	&proc_atm_dev_ops);
1da177e4 LT	422	if (!dev->proc_entry)
	423	goto err_free_name;
	424	dev->proc_entry->data = dev;
1da177e4 LT	425	dev->proc_entry->owner = THIS_MODULE;
	426	return 0;
	427	err_free_name:
	428	kfree(dev->proc_name);
	429	err_out:
	430	return error;
	431	}
	432
	433
	434	void atm_proc_dev_deregister(struct atm_dev *dev)
	435	{
	436	if (!dev->ops->proc_read)
	437	return;
	438
	439	remove_proc_entry(dev->proc_name, atm_proc_root);
	440	kfree(dev->proc_name);
	441	}
	442
	443	static struct atm_proc_entry {
	444	char *name;
9a32144e	445	const struct file_operations *proc_fops;
1da177e4 LT	446	struct proc_dir_entry *dirent;
	447	} atm_proc_ents[] = {
	448	{ .name = "devices", .proc_fops = &devices_seq_fops },
	449	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	450	{ .name = "svc", .proc_fops = &svc_seq_fops },
	451	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	452	{ .name = NULL, .proc_fops = NULL }
	453	};
	454
	455	static void atm_proc_dirs_remove(void)
	456	{
	457	static struct atm_proc_entry *e;
	458
	459	for (e = atm_proc_ents; e->name; e++) {
f7d57453	460	if (e->dirent)
1da177e4 LT	461	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	462	}
e5d69b9f	463	proc_net_remove(&init_net, "atm");
1da177e4 LT	464	}
	465
	466	int __init atm_proc_init(void)
	467	{
	468	static struct atm_proc_entry *e;
	469	int ret;
	470
e5d69b9f	471	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4 LT	472	if (!atm_proc_root)
	473	goto err_out;
	474	for (e = atm_proc_ents; e->name; e++) {
	475	struct proc_dir_entry *dirent;
	476
16e297b3 WC	477	dirent = proc_create(e->name, S_IRUGO,
16e297b3 WC	478	atm_proc_root, e->proc_fops);
1da177e4 LT	479	if (!dirent)
1da177e4 LT	480	goto err_out_remove;
1da177e4 LT	481	dirent->owner = THIS_MODULE;
	482	e->dirent = dirent;
	483	}
	484	ret = 0;
	485	out:
	486	return ret;
	487
	488	err_out_remove:
	489	atm_proc_dirs_remove();
	490	err_out:
	491	ret = -ENOMEM;
	492	goto out;
	493	}
	494
b9c6e3e9	495	void atm_proc_exit(void)
1da177e4 LT	496	{
	497	atm_proc_dirs_remove();
	498	}