[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 <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 == &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(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 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);
	}
	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 [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 */
1da177e4	30	#include <asm/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,
	40	.read = proc_dev_atm_read,
	41	};
	42
	43	static void add_stats(struct seq_file seq, const char aal,
	44	const struct k_atm_aal_stats *stats)
	45	{
	46	seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
07367adb JP	47	atomic_read(&stats->tx), atomic_read(&stats->tx_err),
	48	atomic_read(&stats->rx), atomic_read(&stats->rx_err),
	49	atomic_read(&stats->rx_drop));
1da177e4 LT	50	}
	51
	52	static void atm_dev_info(struct seq_file seq, const struct atm_dev dev)
	53	{
	54	int i;
	55
	56	seq_printf(seq, "%3d %-8s", dev->number, dev->type);
	57	for (i = 0; i < ESI_LEN; i++)
	58	seq_printf(seq, "%02x", dev->esi[i]);
	59	seq_puts(seq, " ");
	60	add_stats(seq, "0", &dev->stats.aal0);
	61	seq_puts(seq, " ");
	62	add_stats(seq, "5", &dev->stats.aal5);
	63	seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
	64	seq_putc(seq, '\n');
	65	}
	66
	67	struct vcc_state {
	68	int bucket;
	69	struct sock *sk;
	70	int family;
	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
	108	static inline void vcc_walk(struct vcc_state state, loff_t l)
	109	{
	110	return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
	111	state : NULL;
	112	}
	113
	114	static int __vcc_seq_open(struct inode inode, struct file file,
ececfdee	115	int family, const struct seq_operations *ops)
1da177e4 LT	116	{
1da177e4 LT	117	struct vcc_state *state;
1da177e4	118
9a8c09e7 PE	119	state = __seq_open_private(file, ops, sizeof(*state));
	120	if (state == NULL)
	121	return -ENOMEM;
1da177e4 LT	122
1da177e4 LT	123	state->family = family;
9a8c09e7	124	return 0;
1da177e4 LT	125	}
	126
	127	static void vcc_seq_start(struct seq_file seq, loff_t *pos)
5c17d5f1	128	__acquires(vcc_sklist_lock)
1da177e4 LT	129	{
	130	struct vcc_state *state = seq->private;
	131	loff_t left = *pos;
	132
	133	read_lock(&vcc_sklist_lock);
2e1e9848 JP	134	state->sk = SEQ_START_TOKEN;
2e1e9848 JP	135	return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
1da177e4 LT	136	}
	137
	138	static void vcc_seq_stop(struct seq_file seq, void v)
5c17d5f1	139	__releases(vcc_sklist_lock)
1da177e4 LT	140	{
	141	read_unlock(&vcc_sklist_lock);
	142	}
	143
	144	static void vcc_seq_next(struct seq_file seq, void v, loff_t pos)
	145	{
	146	struct vcc_state *state = seq->private;
	147
	148	v = vcc_walk(state, 1);
	149	*pos += !!PTR_ERR(v);
	150	return v;
	151	}
	152
	153	static void pvc_info(struct seq_file seq, struct atm_vcc vcc)
	154	{
07367adb JP	155	static const char *const class_name[] = {
07367adb JP	156	"off", "UBR", "CBR", "VBR", "ABR"};
36cbd3dc	157	static const char *const aal_name[] = {
1da177e4 LT	158	"---", "1", "2", "3/4", /* 0- 3 */
	159	"???", "5", "???", "???", /* 4- 7 */
	160	"???", "???", "???", "???", /* 8-11 */
	161	"???", "0", "???", "???"}; /* 12-15 */
	162
	163	seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
07367adb JP	164	vcc->dev->number, vcc->vpi, vcc->vci,
	165	vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
	166	aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
	167	class_name[vcc->qos.rxtp.traffic_class],
	168	vcc->qos.txtp.min_pcr,
	169	class_name[vcc->qos.txtp.traffic_class]);
1da177e4 LT	170	if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
	171	struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
	172	struct net_device *dev;
	173
	174	dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
	175	seq_printf(seq, "CLIP, Itf:%s, Encap:",
	176	dev ? dev->name : "none?");
	177	seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
	178	}
	179	seq_putc(seq, '\n');
	180	}
	181
	182	static const char vcc_state(struct atm_vcc vcc)
	183	{
36cbd3dc	184	static const char *const map[] = { ATM_VS2TXT_MAP };
1da177e4 LT	185
	186	return map[ATM_VF2VS(vcc->flags)];
	187	}
	188
	189	static void vcc_info(struct seq_file seq, struct atm_vcc vcc)
	190	{
	191	struct sock *sk = sk_atm(vcc);
	192
	193	seq_printf(seq, "%p ", vcc);
	194	if (!vcc->dev)
	195	seq_printf(seq, "Unassigned ");
f7d57453	196	else
1da177e4 LT	197	seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
	198	vcc->vci);
	199	switch (sk->sk_family) {
07367adb JP	200	case AF_ATMPVC:
	201	seq_printf(seq, "PVC");
	202	break;
	203	case AF_ATMSVC:
	204	seq_printf(seq, "SVC");
	205	break;
	206	default:
	207	seq_printf(seq, "%3d", sk->sk_family);
1da177e4	208	}
07367adb JP	209	seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
	210	vcc->flags, sk->sk_err,
	211	sk_wmem_alloc_get(sk), sk->sk_sndbuf,
	212	sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
	213	atomic_read(&sk->sk_refcnt));
1da177e4 LT	214	}
	215
	216	static void svc_info(struct seq_file seq, struct atm_vcc vcc)
	217	{
	218	if (!vcc->dev)
	219	seq_printf(seq, sizeof(void *) == 4 ?
	220	"N/A@%p%10s" : "N/A@%p%2s", vcc, "");
	221	else
	222	seq_printf(seq, "%3d %3d %5d ",
	223	vcc->dev->number, vcc->vpi, vcc->vci);
	224	seq_printf(seq, "%-10s ", vcc_state(vcc));
	225	seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
	226	vcc->remote.sas_addr.pub && vcc->remote.sas_addr.prv ? "+" : "");
	227	if (*vcc->remote.sas_addr.prv) {
	228	int i;
	229
	230	for (i = 0; i < ATM_ESA_LEN; i++)
	231	seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
	232	}
	233	seq_putc(seq, '\n');
	234	}
	235
	236	static int atm_dev_seq_show(struct seq_file seq, void v)
	237	{
	238	static char atm_dev_banner[] =
	239	"Itf Type ESI/\"MAC\"addr "
	240	"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
f7d57453	241
67de7924	242	if (v == &atm_devs)
1da177e4 LT	243	seq_puts(seq, atm_dev_banner);
	244	else {
	245	struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
	246
	247	atm_dev_info(seq, dev);
	248	}
f7d57453	249	return 0;
1da177e4	250	}
f7d57453	251
56b3d975	252	static const struct seq_operations atm_dev_seq_ops = {
1da177e4 LT	253	.start = atm_dev_seq_start,
	254	.next = atm_dev_seq_next,
	255	.stop = atm_dev_seq_stop,
	256	.show = atm_dev_seq_show,
	257	};
f7d57453	258
1da177e4 LT	259	static int atm_dev_seq_open(struct inode inode, struct file file)
	260	{
	261	return seq_open(file, &atm_dev_seq_ops);
	262	}
f7d57453	263
9a32144e	264	static const struct file_operations devices_seq_fops = {
1da177e4 LT	265	.open = atm_dev_seq_open,
	266	.read = seq_read,
	267	.llseek = seq_lseek,
	268	.release = seq_release,
	269	};
	270
	271	static int pvc_seq_show(struct seq_file seq, void v)
	272	{
f7d57453	273	static char atm_pvc_banner[] =
1da177e4 LT	274	"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
1da177e4 LT	275
2e1e9848	276	if (v == SEQ_START_TOKEN)
1da177e4 LT	277	seq_puts(seq, atm_pvc_banner);
	278	else {
	279	struct vcc_state *state = seq->private;
	280	struct atm_vcc *vcc = atm_sk(state->sk);
	281
	282	pvc_info(seq, vcc);
	283	}
	284	return 0;
	285	}
	286
56b3d975	287	static const struct seq_operations pvc_seq_ops = {
1da177e4 LT	288	.start = vcc_seq_start,
	289	.next = vcc_seq_next,
	290	.stop = vcc_seq_stop,
	291	.show = pvc_seq_show,
	292	};
	293
	294	static int pvc_seq_open(struct inode inode, struct file file)
	295	{
	296	return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
	297	}
	298
9a32144e	299	static const struct file_operations pvc_seq_fops = {
1da177e4 LT	300	.open = pvc_seq_open,
	301	.read = seq_read,
	302	.llseek = seq_lseek,
9a8c09e7	303	.release = seq_release_private,
1da177e4 LT	304	};
	305
	306	static int vcc_seq_show(struct seq_file seq, void v)
	307	{
2e1e9848	308	if (v == SEQ_START_TOKEN) {
f7d57453 YH	309	seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
	310	"Address ", "Itf VPI VCI Fam Flags Reply "
	311	"Send buffer Recv buffer [refcnt]\n");
	312	} else {
	313	struct vcc_state *state = seq->private;
	314	struct atm_vcc *vcc = atm_sk(state->sk);
	315
	316	vcc_info(seq, vcc);
	317	}
	318	return 0;
1da177e4	319	}
f7d57453	320
56b3d975	321	static const struct seq_operations vcc_seq_ops = {
f7d57453 YH	322	.start = vcc_seq_start,
	323	.next = vcc_seq_next,
	324	.stop = vcc_seq_stop,
	325	.show = vcc_seq_show,
1da177e4	326	};
f7d57453	327
1da177e4 LT	328	static int vcc_seq_open(struct inode inode, struct file file)
1da177e4 LT	329	{
f7d57453	330	return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
1da177e4	331	}
f7d57453	332
9a32144e	333	static const struct file_operations vcc_seq_fops = {
1da177e4 LT	334	.open = vcc_seq_open,
	335	.read = seq_read,
	336	.llseek = seq_lseek,
9a8c09e7	337	.release = seq_release_private,
1da177e4 LT	338	};
	339
	340	static int svc_seq_show(struct seq_file seq, void v)
	341	{
36cbd3dc	342	static const char atm_svc_banner[] =
1da177e4 LT	343	"Itf VPI VCI State Remote\n";
1da177e4 LT	344
2e1e9848	345	if (v == SEQ_START_TOKEN)
1da177e4 LT	346	seq_puts(seq, atm_svc_banner);
	347	else {
	348	struct vcc_state *state = seq->private;
	349	struct atm_vcc *vcc = atm_sk(state->sk);
	350
	351	svc_info(seq, vcc);
	352	}
	353	return 0;
	354	}
	355
56b3d975	356	static const struct seq_operations svc_seq_ops = {
1da177e4 LT	357	.start = vcc_seq_start,
	358	.next = vcc_seq_next,
	359	.stop = vcc_seq_stop,
	360	.show = svc_seq_show,
	361	};
	362
	363	static int svc_seq_open(struct inode inode, struct file file)
	364	{
	365	return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
	366	}
	367
9a32144e	368	static const struct file_operations svc_seq_fops = {
1da177e4 LT	369	.open = svc_seq_open,
	370	.read = seq_read,
	371	.llseek = seq_lseek,
9a8c09e7	372	.release = seq_release_private,
1da177e4 LT	373	};
	374
	375	static ssize_t proc_dev_atm_read(struct file file, char __user buf,
	376	size_t count, loff_t *pos)
	377	{
	378	struct atm_dev *dev;
	379	unsigned long page;
	380	int length;
	381
07367adb JP	382	if (count == 0)
07367adb JP	383	return 0;
1da177e4	384	page = get_zeroed_page(GFP_KERNEL);
07367adb JP	385	if (!page)
07367adb JP	386	return -ENOMEM;
76a0f174	387	dev = PDE(file->f_path.dentry->d_inode)->data;
1da177e4 LT	388	if (!dev->ops->proc_read)
	389	length = -EINVAL;
	390	else {
07367adb JP	391	length = dev->ops->proc_read(dev, pos, (char *)page);
	392	if (length > count)
	393	length = -EINVAL;
1da177e4 LT	394	}
1da177e4 LT	395	if (length >= 0) {
07367adb JP	396	if (copy_to_user(buf, (char *)page, length))
07367adb JP	397	length = -EFAULT;
1da177e4 LT	398	(*pos)++;
	399	}
	400	free_page(page);
	401	return length;
	402	}
	403
1da177e4 LT	404	struct proc_dir_entry *atm_proc_root;
	405	EXPORT_SYMBOL(atm_proc_root);
	406
	407
	408	int atm_proc_dev_register(struct atm_dev *dev)
	409	{
1da177e4 LT	410	int error;
	411
	412	/* No proc info */
	413	if (!dev->ops->proc_read)
	414	return 0;
	415
	416	error = -ENOMEM;
62c97ac0	417	dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
1da177e4 LT	418	if (!dev->proc_name)
1da177e4 LT	419	goto err_out;
1da177e4	420
0c89652a DL	421	dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
0c89652a DL	422	&proc_atm_dev_ops, dev);
1da177e4 LT	423	if (!dev->proc_entry)
1da177e4 LT	424	goto err_free_name;
1da177e4	425	return 0;
07367adb	426
1da177e4 LT	427	err_free_name:
	428	kfree(dev->proc_name);
	429	err_out:
	430	return error;
	431	}
	432
1da177e4 LT	433	void atm_proc_dev_deregister(struct atm_dev *dev)
	434	{
	435	if (!dev->ops->proc_read)
	436	return;
	437
	438	remove_proc_entry(dev->proc_name, atm_proc_root);
	439	kfree(dev->proc_name);
	440	}
	441
	442	static struct atm_proc_entry {
	443	char *name;
9a32144e	444	const struct file_operations *proc_fops;
1da177e4 LT	445	struct proc_dir_entry *dirent;
	446	} atm_proc_ents[] = {
	447	{ .name = "devices", .proc_fops = &devices_seq_fops },
	448	{ .name = "pvc", .proc_fops = &pvc_seq_fops },
	449	{ .name = "svc", .proc_fops = &svc_seq_fops },
	450	{ .name = "vc", .proc_fops = &vcc_seq_fops },
	451	{ .name = NULL, .proc_fops = NULL }
	452	};
	453
	454	static void atm_proc_dirs_remove(void)
	455	{
	456	static struct atm_proc_entry *e;
	457
	458	for (e = atm_proc_ents; e->name; e++) {
f7d57453	459	if (e->dirent)
1da177e4 LT	460	remove_proc_entry(e->name, atm_proc_root);
1da177e4 LT	461	}
e5d69b9f	462	proc_net_remove(&init_net, "atm");
1da177e4 LT	463	}
	464
	465	int __init atm_proc_init(void)
	466	{
	467	static struct atm_proc_entry *e;
	468	int ret;
	469
e5d69b9f	470	atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
1da177e4 LT	471	if (!atm_proc_root)
	472	goto err_out;
	473	for (e = atm_proc_ents; e->name; e++) {
	474	struct proc_dir_entry *dirent;
	475
16e297b3 WC	476	dirent = proc_create(e->name, S_IRUGO,
16e297b3 WC	477	atm_proc_root, e->proc_fops);
1da177e4 LT	478	if (!dirent)
1da177e4 LT	479	goto err_out_remove;
1da177e4 LT	480	e->dirent = dirent;
	481	}
	482	ret = 0;
	483	out:
	484	return ret;
	485
	486	err_out_remove:
	487	atm_proc_dirs_remove();
	488	err_out:
	489	ret = -ENOMEM;
	490	goto out;
	491	}
	492
b9c6e3e9	493	void atm_proc_exit(void)
1da177e4 LT	494	{
	495	atm_proc_dirs_remove();
	496	}