[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)
	__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	= 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 = 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	{
	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)
5c17d5f1	145	__acquires(vcc_sklist_lock)
1da177e4 LT	146	{
	147	struct vcc_state *state = seq->private;
	148	loff_t left = *pos;
	149
	150	read_lock(&vcc_sklist_lock);
	151	state->sk = (void *)1;
	152	return left ? vcc_walk(state, left) : (void *)1;
	153	}
	154
	155	static void vcc_seq_stop(struct seq_file seq, void v)
5c17d5f1	156	__releases(vcc_sklist_lock)
1da177e4 LT	157	{
	158	read_unlock(&vcc_sklist_lock);
	159	}
	160
	161	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	162	{
	163	struct vcc_state *state = seq->private;
	164
	165	v = vcc_walk(state, 1);
	166	*pos += !!PTR_ERR(v);
	167	return v;
	168	}
	169
	170	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	171	{
	172	static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
	173	static const char *aal_name[] = {
	174	"---", "1", "2", "3/4", /* 0- 3 */
	175	"???", "5", "???", "???", /* 4- 7 */
	176	"???", "???", "???", "???", /* 8-11 */
	177	"???", "0", "???", "???"}; /* 12-15 */
	178
	179	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
	180	vcc->dev->number,vcc->vpi,vcc->vci,
8b14a536	181	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
1da177e4 LT	182	aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
	183	class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
	184	class_name[vcc->qos.txtp.traffic_class]);
	185	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	186	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	187	struct net_device *dev;
	188
	189	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	190	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	191	dev ? dev->name : "none?");
	192	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	193	}
	194	seq_putc(seq, '\n');
	195	}
	196
	197	static const char vcc_state(struct atm_vcc vcc)
	198	{
	199	static const char *map[] = { ATM_VS2TXT_MAP };
	200
	201	return map[ATM_VF2VS(vcc->flags)];
	202	}
	203
	204	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	205	{
	206	struct sock *sk = sk_atm(vcc);
	207
	208	seq_printf(seq, "%p ", vcc);
	209	if (!vcc->dev)
	210	seq_printf(seq, "Unassigned ");
f7d57453	211	else
1da177e4 LT	212	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	213	vcc->vci);
	214	switch (sk->sk_family) {
	215	case AF_ATMPVC:
	216	seq_printf(seq, "PVC");
	217	break;
	218	case AF_ATMSVC:
	219	seq_printf(seq, "SVC");
	220	break;
	221	default:
	222	seq_printf(seq, "%3d", sk->sk_family);
	223	}
	224	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
	225	atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
	226	atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
	227	atomic_read(&sk->sk_refcnt));
	228	}
	229
	230	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	231	{
	232	if (!vcc->dev)
	233	seq_printf(seq, sizeof(void *) == 4 ?
	234	"N/A@%p%10s" : "N/A@%p%2s", vcc, "");
	235	else
	236	seq_printf(seq, "%3d %3d %5d ",
	237	vcc->dev->number, vcc->vpi, vcc->vci);
	238	seq_printf(seq, "%-10s ", vcc_state(vcc));
	239	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	240	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	241	if (*vcc->remote.sas_addr.prv) {
	242	int i;
	243
	244	for (i = 0; i < ATM_ESA_LEN; i++)
	245	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	246	}
	247	seq_putc(seq, '\n');
	248	}
	249
	250	static int atm_dev_seq_show(struct seq_file seq, void v)
	251	{
	252	static char atm_dev_banner[] =
	253	"Itf Type ESI/\"MAC\"addr "
	254	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	255
1da177e4 LT	256	if (v == (void *)1)
	257	seq_puts(seq, atm_dev_banner);
	258	else {
	259	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	260
	261	atm_dev_info(seq, dev);
	262	}
f7d57453	263	return 0;
1da177e4	264	}
f7d57453	265
56b3d975	266	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	267	.start = atm_dev_seq_start,
	268	.next = atm_dev_seq_next,
	269	.stop = atm_dev_seq_stop,
	270	.show = atm_dev_seq_show,
	271	};
f7d57453	272
1da177e4 LT	273	static int atm_dev_seq_open(struct inode inode, struct file file)
	274	{
	275	return seq_open(file, &atm_dev_seq_ops);
	276	}
f7d57453	277
9a32144e	278	static const struct file_operations devices_seq_fops = {
1da177e4 LT	279	.open = atm_dev_seq_open,
	280	.read = seq_read,
	281	.llseek = seq_lseek,
	282	.release = seq_release,
	283	};
	284
	285	static int pvc_seq_show(struct seq_file seq, void v)
	286	{
f7d57453	287	static char atm_pvc_banner[] =
1da177e4 LT	288	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
	289
	290	if (v == (void *)1)
	291	seq_puts(seq, atm_pvc_banner);
	292	else {
	293	struct vcc_state *state = seq->private;
	294	struct atm_vcc *vcc = atm_sk(state->sk);
	295
	296	pvc_info(seq, vcc);
	297	}
	298	return 0;
	299	}
	300
56b3d975	301	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	302	.start = vcc_seq_start,
	303	.next = vcc_seq_next,
	304	.stop = vcc_seq_stop,
	305	.show = pvc_seq_show,
	306	};
	307
	308	static int pvc_seq_open(struct inode inode, struct file file)
	309	{
	310	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	311	}
	312
9a32144e	313	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	314	.open = pvc_seq_open,
	315	.read = seq_read,
	316	.llseek = seq_lseek,
	317	.release = vcc_seq_release,
	318	};
	319
	320	static int vcc_seq_show(struct seq_file seq, void v)
	321	{
f7d57453 YH	322	if (v == (void *)1) {
	323	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	324	"Address ", "Itf VPI VCI Fam Flags Reply "
	325	"Send buffer Recv buffer [refcnt]\n");
	326	} else {
	327	struct vcc_state *state = seq->private;
	328	struct atm_vcc *vcc = atm_sk(state->sk);
	329
	330	vcc_info(seq, vcc);
	331	}
	332	return 0;
1da177e4	333	}
f7d57453	334
56b3d975	335	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	336	.start = vcc_seq_start,
	337	.next = vcc_seq_next,
	338	.stop = vcc_seq_stop,
	339	.show = vcc_seq_show,
1da177e4	340	};
f7d57453	341
1da177e4 LT	342	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	343	{
f7d57453	344	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	345	}
f7d57453	346
9a32144e	347	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	348	.open = vcc_seq_open,
	349	.read = seq_read,
	350	.llseek = seq_lseek,
	351	.release = vcc_seq_release,
	352	};
	353
	354	static int svc_seq_show(struct seq_file seq, void v)
	355	{
f7d57453	356	static char atm_svc_banner[] =
1da177e4 LT	357	"Itf VPI VCI State Remote\n";
	358
	359	if (v == (void *)1)
	360	seq_puts(seq, atm_svc_banner);
	361	else {
	362	struct vcc_state *state = seq->private;
	363	struct atm_vcc *vcc = atm_sk(state->sk);
	364
	365	svc_info(seq, vcc);
	366	}
	367	return 0;
	368	}
	369
56b3d975	370	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	371	.start = vcc_seq_start,
	372	.next = vcc_seq_next,
	373	.stop = vcc_seq_stop,
	374	.show = svc_seq_show,
	375	};
	376
	377	static int svc_seq_open(struct inode inode, struct file file)
	378	{
	379	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	380	}
	381
9a32144e	382	static const struct file_operations svc_seq_fops = {
1da177e4 LT	383	.open = svc_seq_open,
	384	.read = seq_read,
	385	.llseek = seq_lseek,
	386	.release = vcc_seq_release,
	387	};
	388
	389	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	390	size_t count, loff_t *pos)
	391	{
	392	struct atm_dev *dev;
	393	unsigned long page;
	394	int length;
	395
	396	if (count == 0) return 0;
	397	page = get_zeroed_page(GFP_KERNEL);
	398	if (!page) return -ENOMEM;
76a0f174	399	dev = PDE(file->f_path.dentry->d_inode)->data;
1da177e4 LT	400	if (!dev->ops->proc_read)
	401	length = -EINVAL;
	402	else {
	403	length = dev->ops->proc_read(dev,pos,(char *) page);
	404	if (length > count) length = -EINVAL;
	405	}
	406	if (length >= 0) {
	407	if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
	408	(*pos)++;
	409	}
	410	free_page(page);
	411	return length;
	412	}
	413
	414
	415	struct proc_dir_entry *atm_proc_root;
	416	EXPORT_SYMBOL(atm_proc_root);
	417
	418
	419	int atm_proc_dev_register(struct atm_dev *dev)
	420	{
	421	int digits,num;
	422	int error;
	423
	424	/* No proc info */
	425	if (!dev->ops->proc_read)
	426	return 0;
	427
	428	error = -ENOMEM;
	429	digits = 0;
	430	for (num = dev->number; num; num /= 10) digits++;
	431	if (!digits) digits++;
	432
	433	dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
	434	if (!dev->proc_name)
	435	goto err_out;
	436	sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
	437
16e297b3 WC	438	dev->proc_entry = proc_create(dev->proc_name, 0, atm_proc_root,
16e297b3 WC	439	&proc_atm_dev_ops);
1da177e4 LT	440	if (!dev->proc_entry)
	441	goto err_free_name;
	442	dev->proc_entry->data = dev;
1da177e4 LT	443	dev->proc_entry->owner = THIS_MODULE;
	444	return 0;
	445	err_free_name:
	446	kfree(dev->proc_name);
	447	err_out:
	448	return error;
	449	}
	450
	451
	452	void atm_proc_dev_deregister(struct atm_dev *dev)
	453	{
	454	if (!dev->ops->proc_read)
	455	return;
	456
	457	remove_proc_entry(dev->proc_name, atm_proc_root);
	458	kfree(dev->proc_name);
	459	}
	460
	461	static struct atm_proc_entry {
	462	char *name;
9a32144e	463	const struct file_operations *proc_fops;
1da177e4 LT	464	struct proc_dir_entry *dirent;
	465	} atm_proc_ents[] = {
	466	{ .name = "devices", .proc_fops = &devices_seq_fops },
	467	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	468	{ .name = "svc", .proc_fops = &svc_seq_fops },
	469	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	470	{ .name = NULL, .proc_fops = NULL }
	471	};
	472
	473	static void atm_proc_dirs_remove(void)
	474	{
	475	static struct atm_proc_entry *e;
	476
	477	for (e = atm_proc_ents; e->name; e++) {
f7d57453	478	if (e->dirent)
1da177e4 LT	479	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	480	}
e5d69b9f	481	proc_net_remove(&init_net, "atm");
1da177e4 LT	482	}
	483
	484	int __init atm_proc_init(void)
	485	{
	486	static struct atm_proc_entry *e;
	487	int ret;
	488
e5d69b9f	489	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4 LT	490	if (!atm_proc_root)
	491	goto err_out;
	492	for (e = atm_proc_ents; e->name; e++) {
	493	struct proc_dir_entry *dirent;
	494
16e297b3 WC	495	dirent = proc_create(e->name, S_IRUGO,
16e297b3 WC	496	atm_proc_root, e->proc_fops);
1da177e4 LT	497	if (!dirent)
1da177e4 LT	498	goto err_out_remove;
1da177e4 LT	499	dirent->owner = THIS_MODULE;
	500	e->dirent = dirent;
	501	}
	502	ret = 0;
	503	out:
	504	return ret;
	505
	506	err_out_remove:
	507	atm_proc_dirs_remove();
	508	err_out:
	509	ret = -ENOMEM;
	510	goto out;
	511	}
	512
b9c6e3e9	513	void atm_proc_exit(void)
1da177e4 LT	514	{
	515	atm_proc_dirs_remove();
	516	}