[mirror_ubuntu-jammy-kernel.git] / net / atm / proc.c

// SPDX-License-Identifier: GPL-2.0
/* 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 <linux/slab.h>
#include <net/net_namespace.h>
#include <net/atmclip.h>
#include <linux/uaccess.h>
#include <linux/param.h> /* for HZ */
#include <linux/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 proc_ops atm_dev_proc_ops = {
	.proc_read	= proc_dev_atm_read,
	.proc_lseek	= noop_llseek,
};

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]", refcount_read(&dev->refcnt));
	seq_putc(seq, '\n');
}

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

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 seq_file *seq, loff_t l)
{
	struct vcc_state *state = seq->private;
	int family = (uintptr_t)(PDE_DATA(file_inode(seq->file)));

	return __vcc_walk(&state->sk, family, &state->bucket, l) ?
	       state : NULL;
}

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(seq, 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)
{
	v = vcc_walk(seq, 1);
	(*pos)++;
	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, "%pK ", 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,
		   refcount_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@%pK%10s" : "N/A@%pK%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 == &atm_devs)
		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 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 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 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 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_DATA(file_inode(file));
	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 error;

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

	error = -ENOMEM;
	dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
	if (!dev->proc_name)
		goto err_out;

	dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
					   &atm_dev_proc_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);
}

int __init atm_proc_init(void)
{
	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
	if (!atm_proc_root)
		return -ENOMEM;
	proc_create_seq("devices", 0444, atm_proc_root, &atm_dev_seq_ops);
	proc_create_seq_private("pvc", 0444, atm_proc_root, &pvc_seq_ops,
			sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMPVC);
	proc_create_seq_private("svc", 0444, atm_proc_root, &svc_seq_ops,
			sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMSVC);
	proc_create_seq_private("vc", 0444, atm_proc_root, &vcc_seq_ops,
			sizeof(struct vcc_state), NULL);
	return 0;
}

void atm_proc_exit(void)
{
	remove_proc_subtree("atm", init_net.proc_net);
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/* net/atm/proc.c - ATM /proc interface
	3	*
	4	* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
	5	*
	6	* seq_file api usage by romieu@fr.zoreil.com
	7	*
	8	* Evaluating the efficiency of the whole thing if left as an exercise to
	9	* the reader.
	10	*/
	11
1da177e4 LT	12	#include <linux/module.h> /* for EXPORT_SYMBOL */
	13	#include <linux/string.h>
	14	#include <linux/types.h>
	15	#include <linux/mm.h>
	16	#include <linux/fs.h>
	17	#include <linux/stat.h>
	18	#include <linux/proc_fs.h>
	19	#include <linux/seq_file.h>
	20	#include <linux/errno.h>
	21	#include <linux/atm.h>
	22	#include <linux/atmdev.h>
	23	#include <linux/netdevice.h>
	24	#include <linux/atmclip.h>
	25	#include <linux/init.h> /* for __init */
5a0e3ad6	26	#include <linux/slab.h>
457c4cbc	27	#include <net/net_namespace.h>
1da177e4	28	#include <net/atmclip.h>
07367adb JP	29	#include <linux/uaccess.h>
07367adb JP	30	#include <linux/param.h> /* for HZ */
60063497	31	#include <linux/atomic.h>
1da177e4 LT	32	#include "resources.h"
	33	#include "common.h" /* atm_proc_init prototype */
	34	#include "signaling.h" /* to get sigd - ugly too */
	35
07367adb JP	36	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
07367adb JP	37	size_t count, loff_t *pos);
1da177e4	38
97a32539 AD	39	static const struct proc_ops atm_dev_proc_ops = {
	40	.proc_read = proc_dev_atm_read,
	41	.proc_lseek = noop_llseek,
1da177e4 LT	42	};
	43
	44	static void add_stats(struct seq_file seq, const char aal,
	45	const struct k_atm_aal_stats *stats)
	46	{
	47	seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
07367adb JP	48	atomic_read(&stats->tx), atomic_read(&stats->tx_err),
	49	atomic_read(&stats->rx), atomic_read(&stats->rx_err),
	50	atomic_read(&stats->rx_drop));
1da177e4 LT	51	}
	52
	53	static void atm_dev_info(struct seq_file seq, const struct atm_dev dev)
	54	{
	55	int i;
	56
	57	seq_printf(seq, "%3d %-8s", dev->number, dev->type);
	58	for (i = 0; i < ESI_LEN; i++)
	59	seq_printf(seq, "%02x", dev->esi[i]);
	60	seq_puts(seq, " ");
	61	add_stats(seq, "0", &dev->stats.aal0);
	62	seq_puts(seq, " ");
	63	add_stats(seq, "5", &dev->stats.aal5);
458bc30c	64	seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt));
1da177e4 LT	65	seq_putc(seq, '\n');
	66	}
	67
	68	struct vcc_state {
	69	int bucket;
	70	struct sock *sk;
1da177e4 LT	71	};
	72
	73	static inline int compare_family(struct sock *sk, int family)
	74	{
	75	return !family \|\| (sk->sk_family == family);
	76	}
	77
	78	static int __vcc_walk(struct sock *sock, int family, int bucket, loff_t l)
	79	{
	80	struct sock sk = sock;
	81
2e1e9848	82	if (sk == SEQ_START_TOKEN) {
1da177e4 LT	83	for (bucket = 0; bucket < VCC_HTABLE_SIZE; ++*bucket) {
	84	struct hlist_head head = &vcc_hash[bucket];
	85
	86	sk = hlist_empty(head) ? NULL : __sk_head(head);
	87	if (sk)
	88	break;
	89	}
	90	l--;
f7d57453	91	}
1da177e4 LT	92	try_again:
	93	for (; sk; sk = sk_next(sk)) {
	94	l -= compare_family(sk, family);
	95	if (l < 0)
	96	goto out;
	97	}
	98	if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
	99	sk = sk_head(&vcc_hash[*bucket]);
	100	goto try_again;
	101	}
2e1e9848	102	sk = SEQ_START_TOKEN;
1da177e4 LT	103	out:
	104	*sock = sk;
	105	return (l < 0);
	106	}
	107
a2d03aac	108	static inline void vcc_walk(struct seq_file seq, loff_t l)
1da177e4	109	{
a2d03aac CH	110	struct vcc_state *state = seq->private;
a2d03aac CH	111	int family = (uintptr_t)(PDE_DATA(file_inode(seq->file)));
1da177e4	112
a2d03aac CH	113	return __vcc_walk(&state->sk, family, &state->bucket, l) ?
a2d03aac CH	114	state : NULL;
1da177e4 LT	115	}
	116
	117	static void vcc_seq_start(struct seq_file seq, loff_t *pos)
5c17d5f1	118	__acquires(vcc_sklist_lock)
1da177e4 LT	119	{
	120	struct vcc_state *state = seq->private;
	121	loff_t left = *pos;
	122
	123	read_lock(&vcc_sklist_lock);
2e1e9848	124	state->sk = SEQ_START_TOKEN;
a2d03aac	125	return left ? vcc_walk(seq, left) : SEQ_START_TOKEN;
1da177e4 LT	126	}
	127
	128	static void vcc_seq_stop(struct seq_file seq, void v)
5c17d5f1	129	__releases(vcc_sklist_lock)
1da177e4 LT	130	{
	131	read_unlock(&vcc_sklist_lock);
	132	}
	133
	134	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	135	{
a2d03aac	136	v = vcc_walk(seq, 1);
8bf70920	137	(*pos)++;
1da177e4 LT	138	return v;
	139	}
	140
	141	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	142	{
07367adb JP	143	static const char *const class_name[] = {
07367adb JP	144	"off", "UBR", "CBR", "VBR", "ABR"};
36cbd3dc	145	static const char *const aal_name[] = {
1da177e4 LT	146	"---", "1", "2", "3/4", /* 0- 3 */
	147	"???", "5", "???", "???", /* 4- 7 */
	148	"???", "???", "???", "???", /* 8-11 */
	149	"???", "0", "???", "???"}; /* 12-15 */
	150
	151	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
07367adb JP	152	vcc->dev->number, vcc->vpi, vcc->vci,
	153	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
	154	aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
	155	class_name[vcc->qos.rxtp.traffic_class],
	156	vcc->qos.txtp.min_pcr,
	157	class_name[vcc->qos.txtp.traffic_class]);
1da177e4 LT	158	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	159	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	160	struct net_device *dev;
	161
	162	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	163	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	164	dev ? dev->name : "none?");
	165	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	166	}
	167	seq_putc(seq, '\n');
	168	}
	169
	170	static const char vcc_state(struct atm_vcc vcc)
	171	{
36cbd3dc	172	static const char *const map[] = { ATM_VS2TXT_MAP };
1da177e4 LT	173
	174	return map[ATM_VF2VS(vcc->flags)];
	175	}
	176
	177	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	178	{
	179	struct sock *sk = sk_atm(vcc);
	180
71338aa7	181	seq_printf(seq, "%pK ", vcc);
1da177e4 LT	182	if (!vcc->dev)
1da177e4 LT	183	seq_printf(seq, "Unassigned ");
f7d57453	184	else
1da177e4 LT	185	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	186	vcc->vci);
	187	switch (sk->sk_family) {
07367adb JP	188	case AF_ATMPVC:
	189	seq_printf(seq, "PVC");
	190	break;
	191	case AF_ATMSVC:
	192	seq_printf(seq, "SVC");
	193	break;
	194	default:
	195	seq_printf(seq, "%3d", sk->sk_family);
1da177e4	196	}
07367adb JP	197	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
	198	vcc->flags, sk->sk_err,
	199	sk_wmem_alloc_get(sk), sk->sk_sndbuf,
	200	sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
41c6d650	201	refcount_read(&sk->sk_refcnt));
1da177e4 LT	202	}
	203
	204	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	205	{
	206	if (!vcc->dev)
	207	seq_printf(seq, sizeof(void *) == 4 ?
71338aa7	208	"N/A@%pK%10s" : "N/A@%pK%2s", vcc, "");
1da177e4 LT	209	else
	210	seq_printf(seq, "%3d %3d %5d ",
	211	vcc->dev->number, vcc->vpi, vcc->vci);
	212	seq_printf(seq, "%-10s ", vcc_state(vcc));
	213	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	214	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	215	if (*vcc->remote.sas_addr.prv) {
	216	int i;
	217
	218	for (i = 0; i < ATM_ESA_LEN; i++)
	219	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	220	}
	221	seq_putc(seq, '\n');
	222	}
	223
	224	static int atm_dev_seq_show(struct seq_file seq, void v)
	225	{
	226	static char atm_dev_banner[] =
	227	"Itf Type ESI/\"MAC\"addr "
	228	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	229
67de7924	230	if (v == &atm_devs)
1da177e4 LT	231	seq_puts(seq, atm_dev_banner);
	232	else {
	233	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	234
	235	atm_dev_info(seq, dev);
	236	}
f7d57453	237	return 0;
1da177e4	238	}
f7d57453	239
56b3d975	240	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	241	.start = atm_dev_seq_start,
	242	.next = atm_dev_seq_next,
	243	.stop = atm_dev_seq_stop,
	244	.show = atm_dev_seq_show,
	245	};
f7d57453	246
1da177e4 LT	247	static int pvc_seq_show(struct seq_file seq, void v)
1da177e4 LT	248	{
f7d57453	249	static char atm_pvc_banner[] =
1da177e4 LT	250	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
1da177e4 LT	251
2e1e9848	252	if (v == SEQ_START_TOKEN)
1da177e4 LT	253	seq_puts(seq, atm_pvc_banner);
	254	else {
	255	struct vcc_state *state = seq->private;
	256	struct atm_vcc *vcc = atm_sk(state->sk);
	257
	258	pvc_info(seq, vcc);
	259	}
	260	return 0;
	261	}
	262
56b3d975	263	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	264	.start = vcc_seq_start,
	265	.next = vcc_seq_next,
	266	.stop = vcc_seq_stop,
	267	.show = pvc_seq_show,
	268	};
	269
1da177e4 LT	270	static int vcc_seq_show(struct seq_file seq, void v)
1da177e4 LT	271	{
2e1e9848	272	if (v == SEQ_START_TOKEN) {
f7d57453 YH	273	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	274	"Address ", "Itf VPI VCI Fam Flags Reply "
	275	"Send buffer Recv buffer [refcnt]\n");
	276	} else {
	277	struct vcc_state *state = seq->private;
	278	struct atm_vcc *vcc = atm_sk(state->sk);
	279
	280	vcc_info(seq, vcc);
	281	}
	282	return 0;
1da177e4	283	}
f7d57453	284
56b3d975	285	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	286	.start = vcc_seq_start,
	287	.next = vcc_seq_next,
	288	.stop = vcc_seq_stop,
	289	.show = vcc_seq_show,
1da177e4	290	};
f7d57453	291
1da177e4 LT	292	static int svc_seq_show(struct seq_file seq, void v)
1da177e4 LT	293	{
36cbd3dc	294	static const char atm_svc_banner[] =
1da177e4 LT	295	"Itf VPI VCI State Remote\n";
1da177e4 LT	296
2e1e9848	297	if (v == SEQ_START_TOKEN)
1da177e4 LT	298	seq_puts(seq, atm_svc_banner);
	299	else {
	300	struct vcc_state *state = seq->private;
	301	struct atm_vcc *vcc = atm_sk(state->sk);
	302
	303	svc_info(seq, vcc);
	304	}
	305	return 0;
	306	}
	307
56b3d975	308	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	309	.start = vcc_seq_start,
	310	.next = vcc_seq_next,
	311	.stop = vcc_seq_stop,
	312	.show = svc_seq_show,
	313	};
	314
1da177e4 LT	315	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	316	size_t count, loff_t *pos)
	317	{
	318	struct atm_dev *dev;
	319	unsigned long page;
	320	int length;
	321
07367adb JP	322	if (count == 0)
07367adb JP	323	return 0;
1da177e4	324	page = get_zeroed_page(GFP_KERNEL);
07367adb JP	325	if (!page)
07367adb JP	326	return -ENOMEM;
d9dda78b	327	dev = PDE_DATA(file_inode(file));
1da177e4 LT	328	if (!dev->ops->proc_read)
	329	length = -EINVAL;
	330	else {
07367adb JP	331	length = dev->ops->proc_read(dev, pos, (char *)page);
	332	if (length > count)
	333	length = -EINVAL;
1da177e4 LT	334	}
1da177e4 LT	335	if (length >= 0) {
07367adb JP	336	if (copy_to_user(buf, (char *)page, length))
07367adb JP	337	length = -EFAULT;
1da177e4 LT	338	(*pos)++;
	339	}
	340	free_page(page);
	341	return length;
	342	}
	343
1da177e4 LT	344	struct proc_dir_entry *atm_proc_root;
	345	EXPORT_SYMBOL(atm_proc_root);
	346
	347
	348	int atm_proc_dev_register(struct atm_dev *dev)
	349	{
1da177e4 LT	350	int error;
	351
	352	/* No proc info */
	353	if (!dev->ops->proc_read)
	354	return 0;
	355
	356	error = -ENOMEM;
62c97ac0	357	dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
1da177e4 LT	358	if (!dev->proc_name)
1da177e4 LT	359	goto err_out;
1da177e4	360
0c89652a	361	dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
97a32539	362	&atm_dev_proc_ops, dev);
1da177e4 LT	363	if (!dev->proc_entry)
1da177e4 LT	364	goto err_free_name;
1da177e4	365	return 0;
07367adb	366
1da177e4 LT	367	err_free_name:
	368	kfree(dev->proc_name);
	369	err_out:
	370	return error;
	371	}
	372
1da177e4 LT	373	void atm_proc_dev_deregister(struct atm_dev *dev)
	374	{
	375	if (!dev->ops->proc_read)
	376	return;
	377
	378	remove_proc_entry(dev->proc_name, atm_proc_root);
	379	kfree(dev->proc_name);
	380	}
	381
1da177e4 LT	382	int __init atm_proc_init(void)
1da177e4 LT	383	{
e5d69b9f	384	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4	385	if (!atm_proc_root)
ce9fe438 CH	386	return -ENOMEM;
ce9fe438 CH	387	proc_create_seq("devices", 0444, atm_proc_root, &atm_dev_seq_ops);
a2d03aac CH	388	proc_create_seq_private("pvc", 0444, atm_proc_root, &pvc_seq_ops,
	389	sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMPVC);
	390	proc_create_seq_private("svc", 0444, atm_proc_root, &svc_seq_ops,
	391	sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMSVC);
	392	proc_create_seq_private("vc", 0444, atm_proc_root, &vcc_seq_ops,
	393	sizeof(struct vcc_state), NULL);
ce9fe438	394	return 0;
1da177e4 LT	395	}
1da177e4 LT	396
b9c6e3e9	397	void atm_proc_exit(void)
1da177e4	398	{
ce9fe438	399	remove_proc_subtree("atm", init_net.proc_net);
1da177e4	400	}