[linux.git] / net / atm / proc.c

/* net/atm/proc.c - ATM /proc interface
 *
 * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
 *
 * seq_file api usage by [email protected]
 *
 * 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]", 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, "%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,
		   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@%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
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 [email protected]
	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 */
5a0e3ad6	25	#include <linux/slab.h>
457c4cbc	26	#include <net/net_namespace.h>
1da177e4	27	#include <net/atmclip.h>
07367adb JP	28	#include <linux/uaccess.h>
07367adb JP	29	#include <linux/param.h> /* for HZ */
60063497	30	#include <linux/atomic.h>
1da177e4 LT	31	#include "resources.h"
	32	#include "common.h" /* atm_proc_init prototype */
	33	#include "signaling.h" /* to get sigd - ugly too */
	34
07367adb JP	35	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
07367adb JP	36	size_t count, loff_t *pos);
1da177e4	37
9a32144e	38	static const struct file_operations proc_atm_dev_ops = {
1da177e4 LT	39	.owner = THIS_MODULE,
1da177e4 LT	40	.read = proc_dev_atm_read,
6038f373	41	.llseek = 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);
	64	seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
	65	seq_putc(seq, '\n');
	66	}
	67
	68	struct vcc_state {
	69	int bucket;
	70	struct sock *sk;
	71	int family;
	72	};
	73
	74	static inline int compare_family(struct sock *sk, int family)
	75	{
	76	return !family \|\| (sk->sk_family == family);
	77	}
	78
	79	static int __vcc_walk(struct sock *sock, int family, int bucket, loff_t l)
	80	{
	81	struct sock sk = sock;
	82
2e1e9848	83	if (sk == SEQ_START_TOKEN) {
1da177e4 LT	84	for (bucket = 0; bucket < VCC_HTABLE_SIZE; ++*bucket) {
	85	struct hlist_head head = &vcc_hash[bucket];
	86
	87	sk = hlist_empty(head) ? NULL : __sk_head(head);
	88	if (sk)
	89	break;
	90	}
	91	l--;
f7d57453	92	}
1da177e4 LT	93	try_again:
	94	for (; sk; sk = sk_next(sk)) {
	95	l -= compare_family(sk, family);
	96	if (l < 0)
	97	goto out;
	98	}
	99	if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
	100	sk = sk_head(&vcc_hash[*bucket]);
	101	goto try_again;
	102	}
2e1e9848	103	sk = SEQ_START_TOKEN;
1da177e4 LT	104	out:
	105	*sock = sk;
	106	return (l < 0);
	107	}
	108
	109	static inline void vcc_walk(struct vcc_state state, loff_t l)
	110	{
	111	return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
	112	state : NULL;
	113	}
	114
	115	static int __vcc_seq_open(struct inode inode, struct file file,
ececfdee	116	int family, const struct seq_operations *ops)
1da177e4 LT	117	{
1da177e4 LT	118	struct vcc_state *state;
1da177e4	119
9a8c09e7 PE	120	state = __seq_open_private(file, ops, sizeof(*state));
	121	if (state == NULL)
	122	return -ENOMEM;
1da177e4 LT	123
1da177e4 LT	124	state->family = family;
9a8c09e7	125	return 0;
1da177e4 LT	126	}
	127
	128	static void vcc_seq_start(struct seq_file seq, loff_t *pos)
5c17d5f1	129	__acquires(vcc_sklist_lock)
1da177e4 LT	130	{
	131	struct vcc_state *state = seq->private;
	132	loff_t left = *pos;
	133
	134	read_lock(&vcc_sklist_lock);
2e1e9848 JP	135	state->sk = SEQ_START_TOKEN;
2e1e9848 JP	136	return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
1da177e4 LT	137	}
	138
	139	static void vcc_seq_stop(struct seq_file seq, void v)
5c17d5f1	140	__releases(vcc_sklist_lock)
1da177e4 LT	141	{
	142	read_unlock(&vcc_sklist_lock);
	143	}
	144
	145	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	146	{
	147	struct vcc_state *state = seq->private;
	148
	149	v = vcc_walk(state, 1);
	150	*pos += !!PTR_ERR(v);
	151	return v;
	152	}
	153
	154	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	155	{
07367adb JP	156	static const char *const class_name[] = {
07367adb JP	157	"off", "UBR", "CBR", "VBR", "ABR"};
36cbd3dc	158	static const char *const aal_name[] = {
1da177e4 LT	159	"---", "1", "2", "3/4", /* 0- 3 */
	160	"???", "5", "???", "???", /* 4- 7 */
	161	"???", "???", "???", "???", /* 8-11 */
	162	"???", "0", "???", "???"}; /* 12-15 */
	163
	164	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
07367adb JP	165	vcc->dev->number, vcc->vpi, vcc->vci,
	166	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
	167	aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
	168	class_name[vcc->qos.rxtp.traffic_class],
	169	vcc->qos.txtp.min_pcr,
	170	class_name[vcc->qos.txtp.traffic_class]);
1da177e4 LT	171	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	172	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	173	struct net_device *dev;
	174
	175	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	176	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	177	dev ? dev->name : "none?");
	178	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	179	}
	180	seq_putc(seq, '\n');
	181	}
	182
	183	static const char vcc_state(struct atm_vcc vcc)
	184	{
36cbd3dc	185	static const char *const map[] = { ATM_VS2TXT_MAP };
1da177e4 LT	186
	187	return map[ATM_VF2VS(vcc->flags)];
	188	}
	189
	190	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	191	{
	192	struct sock *sk = sk_atm(vcc);
	193
71338aa7	194	seq_printf(seq, "%pK ", vcc);
1da177e4 LT	195	if (!vcc->dev)
1da177e4 LT	196	seq_printf(seq, "Unassigned ");
f7d57453	197	else
1da177e4 LT	198	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	199	vcc->vci);
	200	switch (sk->sk_family) {
07367adb JP	201	case AF_ATMPVC:
	202	seq_printf(seq, "PVC");
	203	break;
	204	case AF_ATMSVC:
	205	seq_printf(seq, "SVC");
	206	break;
	207	default:
	208	seq_printf(seq, "%3d", sk->sk_family);
1da177e4	209	}
07367adb JP	210	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
	211	vcc->flags, sk->sk_err,
	212	sk_wmem_alloc_get(sk), sk->sk_sndbuf,
	213	sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
	214	atomic_read(&sk->sk_refcnt));
1da177e4 LT	215	}
	216
	217	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	218	{
	219	if (!vcc->dev)
	220	seq_printf(seq, sizeof(void *) == 4 ?
71338aa7	221	"N/A@%pK%10s" : "N/A@%pK%2s", vcc, "");
1da177e4 LT	222	else
	223	seq_printf(seq, "%3d %3d %5d ",
	224	vcc->dev->number, vcc->vpi, vcc->vci);
	225	seq_printf(seq, "%-10s ", vcc_state(vcc));
	226	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	227	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	228	if (*vcc->remote.sas_addr.prv) {
	229	int i;
	230
	231	for (i = 0; i < ATM_ESA_LEN; i++)
	232	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	233	}
	234	seq_putc(seq, '\n');
	235	}
	236
	237	static int atm_dev_seq_show(struct seq_file seq, void v)
	238	{
	239	static char atm_dev_banner[] =
	240	"Itf Type ESI/\"MAC\"addr "
	241	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	242
67de7924	243	if (v == &atm_devs)
1da177e4 LT	244	seq_puts(seq, atm_dev_banner);
	245	else {
	246	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	247
	248	atm_dev_info(seq, dev);
	249	}
f7d57453	250	return 0;
1da177e4	251	}
f7d57453	252
56b3d975	253	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	254	.start = atm_dev_seq_start,
	255	.next = atm_dev_seq_next,
	256	.stop = atm_dev_seq_stop,
	257	.show = atm_dev_seq_show,
	258	};
f7d57453	259
1da177e4 LT	260	static int atm_dev_seq_open(struct inode inode, struct file file)
	261	{
	262	return seq_open(file, &atm_dev_seq_ops);
	263	}
f7d57453	264
9a32144e	265	static const struct file_operations devices_seq_fops = {
1da177e4 LT	266	.open = atm_dev_seq_open,
	267	.read = seq_read,
	268	.llseek = seq_lseek,
	269	.release = seq_release,
	270	};
	271
	272	static int pvc_seq_show(struct seq_file seq, void v)
	273	{
f7d57453	274	static char atm_pvc_banner[] =
1da177e4 LT	275	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
1da177e4 LT	276
2e1e9848	277	if (v == SEQ_START_TOKEN)
1da177e4 LT	278	seq_puts(seq, atm_pvc_banner);
	279	else {
	280	struct vcc_state *state = seq->private;
	281	struct atm_vcc *vcc = atm_sk(state->sk);
	282
	283	pvc_info(seq, vcc);
	284	}
	285	return 0;
	286	}
	287
56b3d975	288	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	289	.start = vcc_seq_start,
	290	.next = vcc_seq_next,
	291	.stop = vcc_seq_stop,
	292	.show = pvc_seq_show,
	293	};
	294
	295	static int pvc_seq_open(struct inode inode, struct file file)
	296	{
	297	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	298	}
	299
9a32144e	300	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	301	.open = pvc_seq_open,
	302	.read = seq_read,
	303	.llseek = seq_lseek,
9a8c09e7	304	.release = seq_release_private,
1da177e4 LT	305	};
	306
	307	static int vcc_seq_show(struct seq_file seq, void v)
	308	{
2e1e9848	309	if (v == SEQ_START_TOKEN) {
f7d57453 YH	310	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	311	"Address ", "Itf VPI VCI Fam Flags Reply "
	312	"Send buffer Recv buffer [refcnt]\n");
	313	} else {
	314	struct vcc_state *state = seq->private;
	315	struct atm_vcc *vcc = atm_sk(state->sk);
	316
	317	vcc_info(seq, vcc);
	318	}
	319	return 0;
1da177e4	320	}
f7d57453	321
56b3d975	322	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	323	.start = vcc_seq_start,
	324	.next = vcc_seq_next,
	325	.stop = vcc_seq_stop,
	326	.show = vcc_seq_show,
1da177e4	327	};
f7d57453	328
1da177e4 LT	329	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	330	{
f7d57453	331	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	332	}
f7d57453	333
9a32144e	334	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	335	.open = vcc_seq_open,
	336	.read = seq_read,
	337	.llseek = seq_lseek,
9a8c09e7	338	.release = seq_release_private,
1da177e4 LT	339	};
	340
	341	static int svc_seq_show(struct seq_file seq, void v)
	342	{
36cbd3dc	343	static const char atm_svc_banner[] =
1da177e4 LT	344	"Itf VPI VCI State Remote\n";
1da177e4 LT	345
2e1e9848	346	if (v == SEQ_START_TOKEN)
1da177e4 LT	347	seq_puts(seq, atm_svc_banner);
	348	else {
	349	struct vcc_state *state = seq->private;
	350	struct atm_vcc *vcc = atm_sk(state->sk);
	351
	352	svc_info(seq, vcc);
	353	}
	354	return 0;
	355	}
	356
56b3d975	357	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	358	.start = vcc_seq_start,
	359	.next = vcc_seq_next,
	360	.stop = vcc_seq_stop,
	361	.show = svc_seq_show,
	362	};
	363
	364	static int svc_seq_open(struct inode inode, struct file file)
	365	{
	366	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	367	}
	368
9a32144e	369	static const struct file_operations svc_seq_fops = {
1da177e4 LT	370	.open = svc_seq_open,
	371	.read = seq_read,
	372	.llseek = seq_lseek,
9a8c09e7	373	.release = seq_release_private,
1da177e4 LT	374	};
	375
	376	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	377	size_t count, loff_t *pos)
	378	{
	379	struct atm_dev *dev;
	380	unsigned long page;
	381	int length;
	382
07367adb JP	383	if (count == 0)
07367adb JP	384	return 0;
1da177e4	385	page = get_zeroed_page(GFP_KERNEL);
07367adb JP	386	if (!page)
07367adb JP	387	return -ENOMEM;
d9dda78b	388	dev = PDE_DATA(file_inode(file));
1da177e4 LT	389	if (!dev->ops->proc_read)
	390	length = -EINVAL;
	391	else {
07367adb JP	392	length = dev->ops->proc_read(dev, pos, (char *)page);
	393	if (length > count)
	394	length = -EINVAL;
1da177e4 LT	395	}
1da177e4 LT	396	if (length >= 0) {
07367adb JP	397	if (copy_to_user(buf, (char *)page, length))
07367adb JP	398	length = -EFAULT;
1da177e4 LT	399	(*pos)++;
	400	}
	401	free_page(page);
	402	return length;
	403	}
	404
1da177e4 LT	405	struct proc_dir_entry *atm_proc_root;
	406	EXPORT_SYMBOL(atm_proc_root);
	407
	408
	409	int atm_proc_dev_register(struct atm_dev *dev)
	410	{
1da177e4 LT	411	int error;
	412
	413	/* No proc info */
	414	if (!dev->ops->proc_read)
	415	return 0;
	416
	417	error = -ENOMEM;
62c97ac0	418	dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
1da177e4 LT	419	if (!dev->proc_name)
1da177e4 LT	420	goto err_out;
1da177e4	421
0c89652a DL	422	dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
0c89652a DL	423	&proc_atm_dev_ops, dev);
1da177e4 LT	424	if (!dev->proc_entry)
1da177e4 LT	425	goto err_free_name;
1da177e4	426	return 0;
07367adb	427
1da177e4 LT	428	err_free_name:
	429	kfree(dev->proc_name);
	430	err_out:
	431	return error;
	432	}
	433
1da177e4 LT	434	void atm_proc_dev_deregister(struct atm_dev *dev)
	435	{
	436	if (!dev->ops->proc_read)
	437	return;
	438
	439	remove_proc_entry(dev->proc_name, atm_proc_root);
	440	kfree(dev->proc_name);
	441	}
	442
	443	static struct atm_proc_entry {
	444	char *name;
9a32144e	445	const struct file_operations *proc_fops;
1da177e4 LT	446	struct proc_dir_entry *dirent;
	447	} atm_proc_ents[] = {
	448	{ .name = "devices", .proc_fops = &devices_seq_fops },
	449	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	450	{ .name = "svc", .proc_fops = &svc_seq_fops },
	451	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	452	{ .name = NULL, .proc_fops = NULL }
	453	};
	454
	455	static void atm_proc_dirs_remove(void)
	456	{
	457	static struct atm_proc_entry *e;
	458
	459	for (e = atm_proc_ents; e->name; e++) {
f7d57453	460	if (e->dirent)
1da177e4 LT	461	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	462	}
ece31ffd	463	remove_proc_entry("atm", init_net.proc_net);
1da177e4 LT	464	}
	465
	466	int __init atm_proc_init(void)
	467	{
	468	static struct atm_proc_entry *e;
	469	int ret;
	470
e5d69b9f	471	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4 LT	472	if (!atm_proc_root)
	473	goto err_out;
	474	for (e = atm_proc_ents; e->name; e++) {
	475	struct proc_dir_entry *dirent;
	476
16e297b3 WC	477	dirent = proc_create(e->name, S_IRUGO,
16e297b3 WC	478	atm_proc_root, e->proc_fops);
1da177e4 LT	479	if (!dirent)
1da177e4 LT	480	goto err_out_remove;
1da177e4 LT	481	e->dirent = dirent;
	482	}
	483	ret = 0;
	484	out:
	485	return ret;
	486
	487	err_out_remove:
	488	atm_proc_dirs_remove();
	489	err_out:
	490	ret = -ENOMEM;
	491	goto out;
	492	}
	493
b9c6e3e9	494	void atm_proc_exit(void)
1da177e4 LT	495	{
	496	atm_proc_dirs_remove();
	497	}