[people/arne_f/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 file_operations proc_atm_dev_ops = {
	.owner =	THIS_MODULE,
	.read =		proc_dev_atm_read,
	.llseek =	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;
	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, "%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 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_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,
					   &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);
	}
	remove_proc_entry("atm", init_net.proc_net);
}

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

	atm_proc_root = proc_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
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
9a32144e	39	static const struct file_operations proc_atm_dev_ops = {
1da177e4 LT	40	.owner = THIS_MODULE,
1da177e4 LT	41	.read = proc_dev_atm_read,
6038f373	42	.llseek = noop_llseek,
1da177e4 LT	43	};
	44
	45	static void add_stats(struct seq_file seq, const char aal,
	46	const struct k_atm_aal_stats *stats)
	47	{
	48	seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
07367adb JP	49	atomic_read(&stats->tx), atomic_read(&stats->tx_err),
	50	atomic_read(&stats->rx), atomic_read(&stats->rx_err),
	51	atomic_read(&stats->rx_drop));
1da177e4 LT	52	}
	53
	54	static void atm_dev_info(struct seq_file seq, const struct atm_dev dev)
	55	{
	56	int i;
	57
	58	seq_printf(seq, "%3d %-8s", dev->number, dev->type);
	59	for (i = 0; i < ESI_LEN; i++)
	60	seq_printf(seq, "%02x", dev->esi[i]);
	61	seq_puts(seq, " ");
	62	add_stats(seq, "0", &dev->stats.aal0);
	63	seq_puts(seq, " ");
	64	add_stats(seq, "5", &dev->stats.aal5);
458bc30c	65	seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt));
1da177e4 LT	66	seq_putc(seq, '\n');
	67	}
	68
	69	struct vcc_state {
	70	int bucket;
	71	struct sock *sk;
	72	int family;
	73	};
	74
	75	static inline int compare_family(struct sock *sk, int family)
	76	{
	77	return !family \|\| (sk->sk_family == family);
	78	}
	79
	80	static int __vcc_walk(struct sock *sock, int family, int bucket, loff_t l)
	81	{
	82	struct sock sk = sock;
	83
2e1e9848	84	if (sk == SEQ_START_TOKEN) {
1da177e4 LT	85	for (bucket = 0; bucket < VCC_HTABLE_SIZE; ++*bucket) {
	86	struct hlist_head head = &vcc_hash[bucket];
	87
	88	sk = hlist_empty(head) ? NULL : __sk_head(head);
	89	if (sk)
	90	break;
	91	}
	92	l--;
f7d57453	93	}
1da177e4 LT	94	try_again:
	95	for (; sk; sk = sk_next(sk)) {
	96	l -= compare_family(sk, family);
	97	if (l < 0)
	98	goto out;
	99	}
	100	if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
	101	sk = sk_head(&vcc_hash[*bucket]);
	102	goto try_again;
	103	}
2e1e9848	104	sk = SEQ_START_TOKEN;
1da177e4 LT	105	out:
	106	*sock = sk;
	107	return (l < 0);
	108	}
	109
	110	static inline void vcc_walk(struct vcc_state state, loff_t l)
	111	{
	112	return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
	113	state : NULL;
	114	}
	115
	116	static int __vcc_seq_open(struct inode inode, struct file file,
ececfdee	117	int family, const struct seq_operations *ops)
1da177e4 LT	118	{
1da177e4 LT	119	struct vcc_state *state;
1da177e4	120
9a8c09e7 PE	121	state = __seq_open_private(file, ops, sizeof(*state));
	122	if (state == NULL)
	123	return -ENOMEM;
1da177e4 LT	124
1da177e4 LT	125	state->family = family;
9a8c09e7	126	return 0;
1da177e4 LT	127	}
	128
	129	static void vcc_seq_start(struct seq_file seq, loff_t *pos)
5c17d5f1	130	__acquires(vcc_sklist_lock)
1da177e4 LT	131	{
	132	struct vcc_state *state = seq->private;
	133	loff_t left = *pos;
	134
	135	read_lock(&vcc_sklist_lock);
2e1e9848 JP	136	state->sk = SEQ_START_TOKEN;
2e1e9848 JP	137	return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
1da177e4 LT	138	}
	139
	140	static void vcc_seq_stop(struct seq_file seq, void v)
5c17d5f1	141	__releases(vcc_sklist_lock)
1da177e4 LT	142	{
	143	read_unlock(&vcc_sklist_lock);
	144	}
	145
	146	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	147	{
	148	struct vcc_state *state = seq->private;
	149
	150	v = vcc_walk(state, 1);
	151	*pos += !!PTR_ERR(v);
	152	return v;
	153	}
	154
	155	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	156	{
07367adb JP	157	static const char *const class_name[] = {
07367adb JP	158	"off", "UBR", "CBR", "VBR", "ABR"};
36cbd3dc	159	static const char *const aal_name[] = {
1da177e4 LT	160	"---", "1", "2", "3/4", /* 0- 3 */
	161	"???", "5", "???", "???", /* 4- 7 */
	162	"???", "???", "???", "???", /* 8-11 */
	163	"???", "0", "???", "???"}; /* 12-15 */
	164
	165	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
07367adb JP	166	vcc->dev->number, vcc->vpi, vcc->vci,
	167	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
	168	aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
	169	class_name[vcc->qos.rxtp.traffic_class],
	170	vcc->qos.txtp.min_pcr,
	171	class_name[vcc->qos.txtp.traffic_class]);
1da177e4 LT	172	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	173	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	174	struct net_device *dev;
	175
	176	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	177	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	178	dev ? dev->name : "none?");
	179	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	180	}
	181	seq_putc(seq, '\n');
	182	}
	183
	184	static const char vcc_state(struct atm_vcc vcc)
	185	{
36cbd3dc	186	static const char *const map[] = { ATM_VS2TXT_MAP };
1da177e4 LT	187
	188	return map[ATM_VF2VS(vcc->flags)];
	189	}
	190
	191	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	192	{
	193	struct sock *sk = sk_atm(vcc);
	194
71338aa7	195	seq_printf(seq, "%pK ", vcc);
1da177e4 LT	196	if (!vcc->dev)
1da177e4 LT	197	seq_printf(seq, "Unassigned ");
f7d57453	198	else
1da177e4 LT	199	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	200	vcc->vci);
	201	switch (sk->sk_family) {
07367adb JP	202	case AF_ATMPVC:
	203	seq_printf(seq, "PVC");
	204	break;
	205	case AF_ATMSVC:
	206	seq_printf(seq, "SVC");
	207	break;
	208	default:
	209	seq_printf(seq, "%3d", sk->sk_family);
1da177e4	210	}
07367adb JP	211	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
	212	vcc->flags, sk->sk_err,
	213	sk_wmem_alloc_get(sk), sk->sk_sndbuf,
	214	sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
41c6d650	215	refcount_read(&sk->sk_refcnt));
1da177e4 LT	216	}
	217
	218	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	219	{
	220	if (!vcc->dev)
	221	seq_printf(seq, sizeof(void *) == 4 ?
71338aa7	222	"N/A@%pK%10s" : "N/A@%pK%2s", vcc, "");
1da177e4 LT	223	else
	224	seq_printf(seq, "%3d %3d %5d ",
	225	vcc->dev->number, vcc->vpi, vcc->vci);
	226	seq_printf(seq, "%-10s ", vcc_state(vcc));
	227	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	228	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	229	if (*vcc->remote.sas_addr.prv) {
	230	int i;
	231
	232	for (i = 0; i < ATM_ESA_LEN; i++)
	233	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	234	}
	235	seq_putc(seq, '\n');
	236	}
	237
	238	static int atm_dev_seq_show(struct seq_file seq, void v)
	239	{
	240	static char atm_dev_banner[] =
	241	"Itf Type ESI/\"MAC\"addr "
	242	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	243
67de7924	244	if (v == &atm_devs)
1da177e4 LT	245	seq_puts(seq, atm_dev_banner);
	246	else {
	247	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	248
	249	atm_dev_info(seq, dev);
	250	}
f7d57453	251	return 0;
1da177e4	252	}
f7d57453	253
56b3d975	254	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	255	.start = atm_dev_seq_start,
	256	.next = atm_dev_seq_next,
	257	.stop = atm_dev_seq_stop,
	258	.show = atm_dev_seq_show,
	259	};
f7d57453	260
1da177e4 LT	261	static int atm_dev_seq_open(struct inode inode, struct file file)
	262	{
	263	return seq_open(file, &atm_dev_seq_ops);
	264	}
f7d57453	265
9a32144e	266	static const struct file_operations devices_seq_fops = {
1da177e4 LT	267	.open = atm_dev_seq_open,
	268	.read = seq_read,
	269	.llseek = seq_lseek,
	270	.release = seq_release,
	271	};
	272
	273	static int pvc_seq_show(struct seq_file seq, void v)
	274	{
f7d57453	275	static char atm_pvc_banner[] =
1da177e4 LT	276	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
1da177e4 LT	277
2e1e9848	278	if (v == SEQ_START_TOKEN)
1da177e4 LT	279	seq_puts(seq, atm_pvc_banner);
	280	else {
	281	struct vcc_state *state = seq->private;
	282	struct atm_vcc *vcc = atm_sk(state->sk);
	283
	284	pvc_info(seq, vcc);
	285	}
	286	return 0;
	287	}
	288
56b3d975	289	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	290	.start = vcc_seq_start,
	291	.next = vcc_seq_next,
	292	.stop = vcc_seq_stop,
	293	.show = pvc_seq_show,
	294	};
	295
	296	static int pvc_seq_open(struct inode inode, struct file file)
	297	{
	298	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	299	}
	300
9a32144e	301	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	302	.open = pvc_seq_open,
	303	.read = seq_read,
	304	.llseek = seq_lseek,
9a8c09e7	305	.release = seq_release_private,
1da177e4 LT	306	};
	307
	308	static int vcc_seq_show(struct seq_file seq, void v)
	309	{
2e1e9848	310	if (v == SEQ_START_TOKEN) {
f7d57453 YH	311	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	312	"Address ", "Itf VPI VCI Fam Flags Reply "
	313	"Send buffer Recv buffer [refcnt]\n");
	314	} else {
	315	struct vcc_state *state = seq->private;
	316	struct atm_vcc *vcc = atm_sk(state->sk);
	317
	318	vcc_info(seq, vcc);
	319	}
	320	return 0;
1da177e4	321	}
f7d57453	322
56b3d975	323	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	324	.start = vcc_seq_start,
	325	.next = vcc_seq_next,
	326	.stop = vcc_seq_stop,
	327	.show = vcc_seq_show,
1da177e4	328	};
f7d57453	329
1da177e4 LT	330	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	331	{
f7d57453	332	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	333	}
f7d57453	334
9a32144e	335	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	336	.open = vcc_seq_open,
	337	.read = seq_read,
	338	.llseek = seq_lseek,
9a8c09e7	339	.release = seq_release_private,
1da177e4 LT	340	};
	341
	342	static int svc_seq_show(struct seq_file seq, void v)
	343	{
36cbd3dc	344	static const char atm_svc_banner[] =
1da177e4 LT	345	"Itf VPI VCI State Remote\n";
1da177e4 LT	346
2e1e9848	347	if (v == SEQ_START_TOKEN)
1da177e4 LT	348	seq_puts(seq, atm_svc_banner);
	349	else {
	350	struct vcc_state *state = seq->private;
	351	struct atm_vcc *vcc = atm_sk(state->sk);
	352
	353	svc_info(seq, vcc);
	354	}
	355	return 0;
	356	}
	357
56b3d975	358	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	359	.start = vcc_seq_start,
	360	.next = vcc_seq_next,
	361	.stop = vcc_seq_stop,
	362	.show = svc_seq_show,
	363	};
	364
	365	static int svc_seq_open(struct inode inode, struct file file)
	366	{
	367	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	368	}
	369
9a32144e	370	static const struct file_operations svc_seq_fops = {
1da177e4 LT	371	.open = svc_seq_open,
	372	.read = seq_read,
	373	.llseek = seq_lseek,
9a8c09e7	374	.release = seq_release_private,
1da177e4 LT	375	};
	376
	377	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	378	size_t count, loff_t *pos)
	379	{
	380	struct atm_dev *dev;
	381	unsigned long page;
	382	int length;
	383
07367adb JP	384	if (count == 0)
07367adb JP	385	return 0;
1da177e4	386	page = get_zeroed_page(GFP_KERNEL);
07367adb JP	387	if (!page)
07367adb JP	388	return -ENOMEM;
d9dda78b	389	dev = PDE_DATA(file_inode(file));
1da177e4 LT	390	if (!dev->ops->proc_read)
	391	length = -EINVAL;
	392	else {
07367adb JP	393	length = dev->ops->proc_read(dev, pos, (char *)page);
	394	if (length > count)
	395	length = -EINVAL;
1da177e4 LT	396	}
1da177e4 LT	397	if (length >= 0) {
07367adb JP	398	if (copy_to_user(buf, (char *)page, length))
07367adb JP	399	length = -EFAULT;
1da177e4 LT	400	(*pos)++;
	401	}
	402	free_page(page);
	403	return length;
	404	}
	405
1da177e4 LT	406	struct proc_dir_entry *atm_proc_root;
	407	EXPORT_SYMBOL(atm_proc_root);
	408
	409
	410	int atm_proc_dev_register(struct atm_dev *dev)
	411	{
1da177e4 LT	412	int error;
	413
	414	/* No proc info */
	415	if (!dev->ops->proc_read)
	416	return 0;
	417
	418	error = -ENOMEM;
62c97ac0	419	dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
1da177e4 LT	420	if (!dev->proc_name)
1da177e4 LT	421	goto err_out;
1da177e4	422
0c89652a DL	423	dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
0c89652a DL	424	&proc_atm_dev_ops, dev);
1da177e4 LT	425	if (!dev->proc_entry)
1da177e4 LT	426	goto err_free_name;
1da177e4	427	return 0;
07367adb	428
1da177e4 LT	429	err_free_name:
	430	kfree(dev->proc_name);
	431	err_out:
	432	return error;
	433	}
	434
1da177e4 LT	435	void atm_proc_dev_deregister(struct atm_dev *dev)
	436	{
	437	if (!dev->ops->proc_read)
	438	return;
	439
	440	remove_proc_entry(dev->proc_name, atm_proc_root);
	441	kfree(dev->proc_name);
	442	}
	443
	444	static struct atm_proc_entry {
	445	char *name;
9a32144e	446	const struct file_operations *proc_fops;
1da177e4 LT	447	struct proc_dir_entry *dirent;
	448	} atm_proc_ents[] = {
	449	{ .name = "devices", .proc_fops = &devices_seq_fops },
	450	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	451	{ .name = "svc", .proc_fops = &svc_seq_fops },
	452	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	453	{ .name = NULL, .proc_fops = NULL }
	454	};
	455
	456	static void atm_proc_dirs_remove(void)
	457	{
	458	static struct atm_proc_entry *e;
	459
	460	for (e = atm_proc_ents; e->name; e++) {
f7d57453	461	if (e->dirent)
1da177e4 LT	462	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	463	}
ece31ffd	464	remove_proc_entry("atm", init_net.proc_net);
1da177e4 LT	465	}
	466
	467	int __init atm_proc_init(void)
	468	{
	469	static struct atm_proc_entry *e;
	470	int ret;
	471
e5d69b9f	472	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4 LT	473	if (!atm_proc_root)
	474	goto err_out;
	475	for (e = atm_proc_ents; e->name; e++) {
	476	struct proc_dir_entry *dirent;
	477
16e297b3 WC	478	dirent = proc_create(e->name, S_IRUGO,
16e297b3 WC	479	atm_proc_root, e->proc_fops);
1da177e4 LT	480	if (!dirent)
1da177e4 LT	481	goto err_out_remove;
1da177e4 LT	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	}