[linux-2.6-block.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 <linux/uaccess.h>
#include <linux/param.h> /* for HZ */
#include <asm/atomic.h>
#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 == SEQ_START_TOKEN) {
		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 = SEQ_START_TOKEN;
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 = SEQ_START_TOKEN;
	return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
}

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 *const class_name[] = {
		"off", "UBR", "CBR", "VBR", "ABR"};
	static const char *const 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 *const 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,
		   sk_wmem_alloc_get(sk), sk->sk_sndbuf,
		   sk_rmem_alloc_get(sk), 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 == SEQ_START_TOKEN)
		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 == SEQ_START_TOKEN)
		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 == SEQ_START_TOKEN) {
		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 const char atm_svc_banner[] =
		"Itf VPI VCI           State      Remote\n";

	if (v == SEQ_START_TOKEN)
		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_data(dev->proc_name, 0, atm_proc_root,
					   &proc_atm_dev_ops, dev);
	if (!dev->proc_entry)
		goto err_free_name;
	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;
		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	26	#include <net/atmclip.h>
07367adb JP	27	#include <linux/uaccess.h>
07367adb JP	28	#include <linux/param.h> /* for HZ */
1da177e4	29	#include <asm/atomic.h>
1da177e4 LT	30	#include "resources.h"
	31	#include "common.h" /* atm_proc_init prototype */
	32	#include "signaling.h" /* to get sigd - ugly too */
	33
07367adb JP	34	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
07367adb JP	35	size_t count, loff_t *pos);
1da177e4	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,
07367adb JP	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));
1da177e4 LT	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
2e1e9848	81	if (sk == SEQ_START_TOKEN) {
1da177e4 LT	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	}
2e1e9848	101	sk = SEQ_START_TOKEN;
1da177e4 LT	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);
2e1e9848 JP	133	state->sk = SEQ_START_TOKEN;
2e1e9848 JP	134	return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
1da177e4 LT	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	{
07367adb JP	154	static const char *const class_name[] = {
07367adb JP	155	"off", "UBR", "CBR", "VBR", "ABR"};
36cbd3dc	156	static const char *const aal_name[] = {
1da177e4 LT	157	"---", "1", "2", "3/4", /* 0- 3 */
	158	"???", "5", "???", "???", /* 4- 7 */
	159	"???", "???", "???", "???", /* 8-11 */
	160	"???", "0", "???", "???"}; /* 12-15 */
	161
	162	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
07367adb JP	163	vcc->dev->number, vcc->vpi, vcc->vci,
	164	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
	165	aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
	166	class_name[vcc->qos.rxtp.traffic_class],
	167	vcc->qos.txtp.min_pcr,
	168	class_name[vcc->qos.txtp.traffic_class]);
1da177e4 LT	169	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	170	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	171	struct net_device *dev;
	172
	173	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	174	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	175	dev ? dev->name : "none?");
	176	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	177	}
	178	seq_putc(seq, '\n');
	179	}
	180
	181	static const char vcc_state(struct atm_vcc vcc)
	182	{
36cbd3dc	183	static const char *const map[] = { ATM_VS2TXT_MAP };
1da177e4 LT	184
	185	return map[ATM_VF2VS(vcc->flags)];
	186	}
	187
	188	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	189	{
	190	struct sock *sk = sk_atm(vcc);
	191
	192	seq_printf(seq, "%p ", vcc);
	193	if (!vcc->dev)
	194	seq_printf(seq, "Unassigned ");
f7d57453	195	else
1da177e4 LT	196	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	197	vcc->vci);
	198	switch (sk->sk_family) {
07367adb JP	199	case AF_ATMPVC:
	200	seq_printf(seq, "PVC");
	201	break;
	202	case AF_ATMSVC:
	203	seq_printf(seq, "SVC");
	204	break;
	205	default:
	206	seq_printf(seq, "%3d", sk->sk_family);
1da177e4	207	}
07367adb JP	208	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
	209	vcc->flags, sk->sk_err,
	210	sk_wmem_alloc_get(sk), sk->sk_sndbuf,
	211	sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
	212	atomic_read(&sk->sk_refcnt));
1da177e4 LT	213	}
	214
	215	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	216	{
	217	if (!vcc->dev)
	218	seq_printf(seq, sizeof(void *) == 4 ?
	219	"N/A@%p%10s" : "N/A@%p%2s", vcc, "");
	220	else
	221	seq_printf(seq, "%3d %3d %5d ",
	222	vcc->dev->number, vcc->vpi, vcc->vci);
	223	seq_printf(seq, "%-10s ", vcc_state(vcc));
	224	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	225	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	226	if (*vcc->remote.sas_addr.prv) {
	227	int i;
	228
	229	for (i = 0; i < ATM_ESA_LEN; i++)
	230	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	231	}
	232	seq_putc(seq, '\n');
	233	}
	234
	235	static int atm_dev_seq_show(struct seq_file seq, void v)
	236	{
	237	static char atm_dev_banner[] =
	238	"Itf Type ESI/\"MAC\"addr "
	239	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	240
2e1e9848	241	if (v == SEQ_START_TOKEN)
1da177e4 LT	242	seq_puts(seq, atm_dev_banner);
	243	else {
	244	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	245
	246	atm_dev_info(seq, dev);
	247	}
f7d57453	248	return 0;
1da177e4	249	}
f7d57453	250
56b3d975	251	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	252	.start = atm_dev_seq_start,
	253	.next = atm_dev_seq_next,
	254	.stop = atm_dev_seq_stop,
	255	.show = atm_dev_seq_show,
	256	};
f7d57453	257
1da177e4 LT	258	static int atm_dev_seq_open(struct inode inode, struct file file)
	259	{
	260	return seq_open(file, &atm_dev_seq_ops);
	261	}
f7d57453	262
9a32144e	263	static const struct file_operations devices_seq_fops = {
1da177e4 LT	264	.open = atm_dev_seq_open,
	265	.read = seq_read,
	266	.llseek = seq_lseek,
	267	.release = seq_release,
	268	};
	269
	270	static int pvc_seq_show(struct seq_file seq, void v)
	271	{
f7d57453	272	static char atm_pvc_banner[] =
1da177e4 LT	273	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
1da177e4 LT	274
2e1e9848	275	if (v == SEQ_START_TOKEN)
1da177e4 LT	276	seq_puts(seq, atm_pvc_banner);
	277	else {
	278	struct vcc_state *state = seq->private;
	279	struct atm_vcc *vcc = atm_sk(state->sk);
	280
	281	pvc_info(seq, vcc);
	282	}
	283	return 0;
	284	}
	285
56b3d975	286	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	287	.start = vcc_seq_start,
	288	.next = vcc_seq_next,
	289	.stop = vcc_seq_stop,
	290	.show = pvc_seq_show,
	291	};
	292
	293	static int pvc_seq_open(struct inode inode, struct file file)
	294	{
	295	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	296	}
	297
9a32144e	298	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	299	.open = pvc_seq_open,
	300	.read = seq_read,
	301	.llseek = seq_lseek,
9a8c09e7	302	.release = seq_release_private,
1da177e4 LT	303	};
	304
	305	static int vcc_seq_show(struct seq_file seq, void v)
	306	{
2e1e9848	307	if (v == SEQ_START_TOKEN) {
f7d57453 YH	308	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	309	"Address ", "Itf VPI VCI Fam Flags Reply "
	310	"Send buffer Recv buffer [refcnt]\n");
	311	} else {
	312	struct vcc_state *state = seq->private;
	313	struct atm_vcc *vcc = atm_sk(state->sk);
	314
	315	vcc_info(seq, vcc);
	316	}
	317	return 0;
1da177e4	318	}
f7d57453	319
56b3d975	320	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	321	.start = vcc_seq_start,
	322	.next = vcc_seq_next,
	323	.stop = vcc_seq_stop,
	324	.show = vcc_seq_show,
1da177e4	325	};
f7d57453	326
1da177e4 LT	327	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	328	{
f7d57453	329	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	330	}
f7d57453	331
9a32144e	332	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	333	.open = vcc_seq_open,
	334	.read = seq_read,
	335	.llseek = seq_lseek,
9a8c09e7	336	.release = seq_release_private,
1da177e4 LT	337	};
	338
	339	static int svc_seq_show(struct seq_file seq, void v)
	340	{
36cbd3dc	341	static const char atm_svc_banner[] =
1da177e4 LT	342	"Itf VPI VCI State Remote\n";
1da177e4 LT	343
2e1e9848	344	if (v == SEQ_START_TOKEN)
1da177e4 LT	345	seq_puts(seq, atm_svc_banner);
	346	else {
	347	struct vcc_state *state = seq->private;
	348	struct atm_vcc *vcc = atm_sk(state->sk);
	349
	350	svc_info(seq, vcc);
	351	}
	352	return 0;
	353	}
	354
56b3d975	355	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	356	.start = vcc_seq_start,
	357	.next = vcc_seq_next,
	358	.stop = vcc_seq_stop,
	359	.show = svc_seq_show,
	360	};
	361
	362	static int svc_seq_open(struct inode inode, struct file file)
	363	{
	364	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	365	}
	366
9a32144e	367	static const struct file_operations svc_seq_fops = {
1da177e4 LT	368	.open = svc_seq_open,
	369	.read = seq_read,
	370	.llseek = seq_lseek,
9a8c09e7	371	.release = seq_release_private,
1da177e4 LT	372	};
	373
	374	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	375	size_t count, loff_t *pos)
	376	{
	377	struct atm_dev *dev;
	378	unsigned long page;
	379	int length;
	380
07367adb JP	381	if (count == 0)
07367adb JP	382	return 0;
1da177e4	383	page = get_zeroed_page(GFP_KERNEL);
07367adb JP	384	if (!page)
07367adb JP	385	return -ENOMEM;
76a0f174	386	dev = PDE(file->f_path.dentry->d_inode)->data;
1da177e4 LT	387	if (!dev->ops->proc_read)
	388	length = -EINVAL;
	389	else {
07367adb JP	390	length = dev->ops->proc_read(dev, pos, (char *)page);
	391	if (length > count)
	392	length = -EINVAL;
1da177e4 LT	393	}
1da177e4 LT	394	if (length >= 0) {
07367adb JP	395	if (copy_to_user(buf, (char *)page, length))
07367adb JP	396	length = -EFAULT;
1da177e4 LT	397	(*pos)++;
	398	}
	399	free_page(page);
	400	return length;
	401	}
	402
1da177e4 LT	403	struct proc_dir_entry *atm_proc_root;
	404	EXPORT_SYMBOL(atm_proc_root);
	405
	406
	407	int atm_proc_dev_register(struct atm_dev *dev)
	408	{
07367adb	409	int digits, num;
1da177e4 LT	410	int error;
	411
	412	/* No proc info */
	413	if (!dev->ops->proc_read)
	414	return 0;
	415
	416	error = -ENOMEM;
	417	digits = 0;
07367adb JP	418	for (num = dev->number; num; num /= 10)
	419	digits++;
	420	if (!digits)
	421	digits++;
1da177e4 LT	422
	423	dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
	424	if (!dev->proc_name)
	425	goto err_out;
07367adb	426	sprintf(dev->proc_name, "%s:%d", dev->type, dev->number);
1da177e4	427
0c89652a DL	428	dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
0c89652a DL	429	&proc_atm_dev_ops, dev);
1da177e4 LT	430	if (!dev->proc_entry)
1da177e4 LT	431	goto err_free_name;
1da177e4	432	return 0;
07367adb	433
1da177e4 LT	434	err_free_name:
	435	kfree(dev->proc_name);
	436	err_out:
	437	return error;
	438	}
	439
1da177e4 LT	440	void atm_proc_dev_deregister(struct atm_dev *dev)
	441	{
	442	if (!dev->ops->proc_read)
	443	return;
	444
	445	remove_proc_entry(dev->proc_name, atm_proc_root);
	446	kfree(dev->proc_name);
	447	}
	448
	449	static struct atm_proc_entry {
	450	char *name;
9a32144e	451	const struct file_operations *proc_fops;
1da177e4 LT	452	struct proc_dir_entry *dirent;
	453	} atm_proc_ents[] = {
	454	{ .name = "devices", .proc_fops = &devices_seq_fops },
	455	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	456	{ .name = "svc", .proc_fops = &svc_seq_fops },
	457	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	458	{ .name = NULL, .proc_fops = NULL }
	459	};
	460
	461	static void atm_proc_dirs_remove(void)
	462	{
	463	static struct atm_proc_entry *e;
	464
	465	for (e = atm_proc_ents; e->name; e++) {
f7d57453	466	if (e->dirent)
1da177e4 LT	467	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	468	}
e5d69b9f	469	proc_net_remove(&init_net, "atm");
1da177e4 LT	470	}
	471
	472	int __init atm_proc_init(void)
	473	{
	474	static struct atm_proc_entry *e;
	475	int ret;
	476
e5d69b9f	477	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4 LT	478	if (!atm_proc_root)
	479	goto err_out;
	480	for (e = atm_proc_ents; e->name; e++) {
	481	struct proc_dir_entry *dirent;
	482
16e297b3 WC	483	dirent = proc_create(e->name, S_IRUGO,
16e297b3 WC	484	atm_proc_root, e->proc_fops);
1da177e4 LT	485	if (!dirent)
1da177e4 LT	486	goto err_out_remove;
1da177e4 LT	487	e->dirent = dirent;
	488	}
	489	ret = 0;
	490	out:
	491	return ret;
	492
	493	err_out_remove:
	494	atm_proc_dirs_remove();
	495	err_out:
	496	ret = -ENOMEM;
	497	goto out;
	498	}
	499
b9c6e3e9	500	void atm_proc_exit(void)
1da177e4 LT	501	{
	502	atm_proc_dirs_remove();
	503	}