patch-2.3.35 linux/fs/proc/openpromfs.c

• Lines: 1201
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.34/linux/fs/proc/openpromfs.c
• Orig date: Tue Dec 7 09:32:48 1999

diff -u --recursive --new-file v2.3.34/linux/fs/proc/openpromfs.c linux/fs/proc/openpromfs.c
@@ -1,1200 +0,0 @@
-/* $Id: openpromfs.c,v 1.36 1999/08/31 07:01:03 davem Exp $
- * openpromfs.c: /proc/openprom handling routines
- *
- * Copyright (C) 1996-1998 Jakub Jelinek  (jj@sunsite.mff.cuni.cz)
- * Copyright (C) 1998      Eddie C. Dost  (ecd@skynet.be)
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/proc_fs.h>
-#include <linux/init.h>
-
-#include <asm/openprom.h>
-#include <asm/oplib.h>
-#include <asm/uaccess.h>
-
-#define ALIASES_NNODES 64
-
-typedef struct {
-	u16	parent;
-	u16	next;
-	u16	child;
-	u16	first_prop;
-	u32	node;
-} openpromfs_node;
-
-typedef struct {
-#define OPP_STRING	0x10
-#define OPP_STRINGLIST	0x20
-#define OPP_BINARY	0x40
-#define OPP_HEXSTRING	0x80
-#define OPP_DIRTY	0x01
-#define OPP_QUOTED	0x02
-#define OPP_NOTQUOTED	0x04
-#define OPP_ASCIIZ	0x08
-	u32	flag;
-	u32	alloclen;
-	u32	len;
-	char	*value;
-	char	name[8];
-} openprom_property;
-
-static openpromfs_node *nodes = NULL;
-static int alloced = 0;
-static u16 last_node = 0;
-static u16 first_prop = 0;
-static u16 options = 0xffff;
-static u16 aliases = 0xffff;
-static int aliases_nodes = 0;
-static char *alias_names [ALIASES_NNODES];
-extern struct openpromfs_dev *openprom_devices;
-
-#define NODE(ino) nodes[ino - PROC_OPENPROM_FIRST]
-#define NODE2INO(node) (node + PROC_OPENPROM_FIRST)
-#define NODEP2INO(no) (no + PROC_OPENPROM_FIRST + last_node)
-
-static int openpromfs_create (struct inode *, struct dentry *, int);
-static int openpromfs_readdir(struct file *, void *, filldir_t);
-static struct dentry *openpromfs_lookup(struct inode *, struct dentry *dentry);
-static int openpromfs_unlink (struct inode *, struct dentry *dentry);
-
-static ssize_t nodenum_read(struct file *file, char *buf,
-			    size_t count, loff_t *ppos)
-{
-	struct inode *inode = file->f_dentry->d_inode;
-	char buffer[10];
-	
-	if (count < 0 || !inode->u.generic_ip)
-		return -EINVAL;
-	sprintf (buffer, "%8.8x\n", (u32)(long)(inode->u.generic_ip));
-	if (file->f_pos >= 9)
-		return 0;
-	if (count > 9 - file->f_pos)
-		count = 9 - file->f_pos;
-	copy_to_user(buf, buffer + file->f_pos, count);
-	file->f_pos += count;
-	return count;
-}
-
-static ssize_t property_read(struct file *filp, char *buf,
-			     size_t count, loff_t *ppos)
-{
-	struct inode *inode = filp->f_dentry->d_inode;
-	int i, j, k;
-	u32 node;
-	char *p, *s;
-	u32 *q;
-	openprom_property *op;
-	char buffer[64];
-	
-	if (filp->f_pos >= 0xffffff)
-		return -EINVAL;
-	if (!filp->private_data) {
-		node = nodes[(u16)((long)inode->u.generic_ip)].node;
-		i = ((u32)(long)inode->u.generic_ip) >> 16;
-		if ((u16)((long)inode->u.generic_ip) == aliases) {
-			if (i >= aliases_nodes)
-				p = 0;
-			else
-				p = alias_names [i];
-		} else
-			for (p = prom_firstprop (node, buffer);
-			     i && p && *p;
-			     p = prom_nextprop (node, p, buffer), i--)
-				/* nothing */ ;
-		if (!p || !*p)
-			return -EIO;
-		i = prom_getproplen (node, p);
-		if (i < 0) {
-			if ((u16)((long)inode->u.generic_ip) == aliases)
-				i = 0;
-			else
-				return -EIO;
-		}
-		k = i;
-		if (i < 64) i = 64;
-		filp->private_data = kmalloc (sizeof (openprom_property)
-					      + (j = strlen (p)) + 2 * i,
-					      GFP_KERNEL);
-		if (!filp->private_data)
-			return -ENOMEM;
-		op = (openprom_property *)filp->private_data;
-		op->flag = 0;
-		op->alloclen = 2 * i;
-		strcpy (op->name, p);
-		op->value = (char *)(((unsigned long)(op->name + j + 4)) & ~3);
-		op->len = k;
-		if (k && prom_getproperty (node, p, op->value, i) < 0)
-			return -EIO;
-		op->value [k] = 0;
-		if (k) {
-			for (s = 0, p = op->value; p < op->value + k; p++) {
-				if ((*p >= ' ' && *p <= '~') || *p == '\n') {
-					op->flag |= OPP_STRING;
-					s = p;
-					continue;
-				}
-				if (p > op->value && !*p && s == p - 1) {
-					if (p < op->value + k - 1)
-						op->flag |= OPP_STRINGLIST;
-					else
-						op->flag |= OPP_ASCIIZ;
-					continue;
-				}
-				if (k == 1 && !*p) {
-					op->flag |= (OPP_STRING|OPP_ASCIIZ);
-					break;
-				}
-				op->flag &= ~(OPP_STRING|OPP_STRINGLIST);
-				if (k & 3)
-					op->flag |= OPP_HEXSTRING;
-				else
-					op->flag |= OPP_BINARY;
-				break;
-			}
-			if (op->flag & OPP_STRINGLIST)
-				op->flag &= ~(OPP_STRING);
-			if (op->flag & OPP_ASCIIZ)
-				op->len--;
-		}
-	} else
-		op = (openprom_property *)filp->private_data;
-	if (!count || !(op->len || (op->flag & OPP_ASCIIZ)))
-		return 0;
-	if (op->flag & OPP_STRINGLIST) {
-		for (k = 0, p = op->value; p < op->value + op->len; p++)
-			if (!*p)
-				k++;
-		i = op->len + 4 * k + 3;
-	} else if (op->flag & OPP_STRING) {
-		i = op->len + 3;
-	} else if (op->flag & OPP_BINARY) {
-		i = (op->len * 9) >> 2;
-	} else {
-		i = (op->len << 1) + 1;
-	}
-	k = filp->f_pos;
-	if (k >= i) return 0;
-	if (count > i - k) count = i - k;
-	if (op->flag & OPP_STRING) {
-		if (!k) {
-			__put_user('\'', buf);
-			k++;
-			count--;
-		}
-
-		if (k + count >= i - 2)
-			j = i - 2 - k;
-		else
-			j = count;
-
-		if (j >= 0) {
-			copy_to_user(buf + k - filp->f_pos,
-				     op->value + k - 1, j);
-			count -= j;
-			k += j;
-		}
-
-		if (count)
-			__put_user('\'', &buf [k++ - filp->f_pos]);
-		if (count > 1)
-			__put_user('\n', &buf [k++ - filp->f_pos]);
-
-	} else if (op->flag & OPP_STRINGLIST) {
-		char *tmp;
-
-		tmp = kmalloc (i, GFP_KERNEL);
-		if (!tmp)
-			return -ENOMEM;
-
-		s = tmp;
-		*s++ = '\'';
-		for (p = op->value; p < op->value + op->len; p++) {
-			if (!*p) {
-				strcpy(s, "' + '");
-				s += 5;
-				continue;
-			}
-			*s++ = *p;
-		}
-		strcpy(s, "'\n");
-
-		copy_to_user(buf, tmp + k, count);
-
-		kfree(tmp);
-		k += count;
-
-	} else if (op->flag & OPP_BINARY) {
-		char buffer[10];
-		u32 *first, *last;
-		int first_off, last_cnt;
-
-		first = ((u32 *)op->value) + k / 9;
-		first_off = k % 9;
-		last = ((u32 *)op->value) + (k + count - 1) / 9;
-		last_cnt = (k + count) % 9;
-		if (!last_cnt) last_cnt = 9;
-
-		if (first == last) {
-			sprintf (buffer, "%08x.", *first);
-			copy_to_user (buf, buffer + first_off, last_cnt - first_off);
-			buf += last_cnt - first_off;
-		} else {		
-			for (q = first; q <= last; q++) {
-				sprintf (buffer, "%08x.", *q);
-				if (q == first) {
-					copy_to_user (buf, buffer + first_off,
-						      9 - first_off);
-					buf += 9 - first_off;
-				} else if (q == last) {
-					copy_to_user (buf, buffer, last_cnt);
-					buf += last_cnt;
-				} else {
-					copy_to_user (buf, buffer, 9);
-					buf += 9;
-				}
-			}
-		}
-
-		if (last == (u32 *)(op->value + op->len - 4) && last_cnt == 9)
-			__put_user('\n', (buf - 1));
-
-		k += count;
-
-	} else if (op->flag & OPP_HEXSTRING) {
-		char buffer[2];
-
-		if ((k < i - 1) && (k & 1)) {
-			sprintf (buffer, "%02x", *(op->value + (k >> 1)));
-			__put_user(buffer[1], &buf[k++ - filp->f_pos]);
-			count--;
-		}
-
-		for (; (count > 1) && (k < i - 1); k += 2) {
-			sprintf (buffer, "%02x", *(op->value + (k >> 1)));
-			copy_to_user (buf + k - filp->f_pos, buffer, 2);
-			count -= 2;
-		}
-
-		if (count && (k < i - 1)) {
-			sprintf (buffer, "%02x", *(op->value + (k >> 1)));
-			__put_user(buffer[0], &buf[k++ - filp->f_pos]);
-			count--;
-		}
-
-		if (count)
-			__put_user('\n', &buf [k++ - filp->f_pos]);
-	}
-	count = k - filp->f_pos;
-	filp->f_pos = k;
-	return count;
-}
-
-static ssize_t property_write(struct file *filp, const char *buf,
-			      size_t count, loff_t *ppos)
-{
-	int i, j, k;
-	char *p;
-	u32 *q;
-	void *b;
-	openprom_property *op;
-	
-	if (filp->f_pos >= 0xffffff)
-		return -EINVAL;
-	if (!filp->private_data) {
-		i = property_read (filp, NULL, 0, 0);
-		if (i)
-			return i;
-	}
-	k = filp->f_pos;
-	op = (openprom_property *)filp->private_data;
-	if (!(op->flag & OPP_STRING)) {
-		u32 *first, *last;
-		int first_off, last_cnt;
-		u32 mask, mask2;
-		char tmp [9];
-		int forcelen = 0;
-		
-		j = k % 9;
-		for (i = 0; i < count; i++, j++) {
-			if (j == 9) j = 0;
-			if (!j) {
-				char ctmp;
-				__get_user(ctmp, &buf[i]);
-				if (ctmp != '.') {
-					if (ctmp != '\n') {
-						if (op->flag & OPP_BINARY)
-							return -EINVAL;
-						else
-							goto write_try_string;
-					} else {
-						count = i + 1;
-						forcelen = 1;
-						break;
-					}
-				}
-			} else {
-				char ctmp;
-				__get_user(ctmp, &buf[i]);
-				if (ctmp < '0' || 
-				    (ctmp > '9' && ctmp < 'A') ||
-				    (ctmp > 'F' && ctmp < 'a') ||
-				    ctmp > 'f') {
-					if (op->flag & OPP_BINARY)
-						return -EINVAL;
-					else
-						goto write_try_string;
-				}
-			}
-		}
-		op->flag |= OPP_BINARY;
-		tmp [8] = 0;
-		i = ((count + k + 8) / 9) << 2;
-		if (op->alloclen <= i) {
-			b = kmalloc (sizeof (openprom_property) + 2 * i,
-				     GFP_KERNEL);
-			if (!b)
-				return -ENOMEM;
-			memcpy (b, filp->private_data,
-				sizeof (openprom_property)
-				+ strlen (op->name) + op->alloclen);
-			memset (((char *)b) + sizeof (openprom_property)
-				+ strlen (op->name) + op->alloclen, 
-				0, 2 * i - op->alloclen);
-			op = (openprom_property *)b;
-			op->alloclen = 2*i;
-			b = filp->private_data;
-			filp->private_data = (void *)op;
-			kfree (b);
-		}
-		first = ((u32 *)op->value) + (k / 9);
-		first_off = k % 9;
-		last = (u32 *)(op->value + i);
-		last_cnt = (k + count) % 9;
-		if (first + 1 == last) {
-			memset (tmp, '0', 8);
-			copy_from_user (tmp + first_off, buf,
-					(count + first_off > 8) ? 8 - first_off : count);
-			mask = 0xffffffff;
-			mask2 = 0xffffffff;
-			for (j = 0; j < first_off; j++)
-				mask >>= 1;
-			for (j = 8 - count - first_off; j > 0; j--)
-				mask2 <<= 1;
-			mask &= mask2;
-			if (mask) {
-				*first &= ~mask;
-				*first |= simple_strtoul (tmp, 0, 16);
-				op->flag |= OPP_DIRTY;
-			}
-		} else {
-			op->flag |= OPP_DIRTY;
-			for (q = first; q < last; q++) {
-				if (q == first) {
-					if (first_off < 8) {
-						memset (tmp, '0', 8);
-						copy_from_user (tmp + first_off, buf,
-								8 - first_off);
-						mask = 0xffffffff;
-						for (j = 0; j < first_off; j++)
-							mask >>= 1;
-						*q &= ~mask;
-						*q |= simple_strtoul (tmp,0,16);
-					}
-					buf += 9;
-				} else if ((q == last - 1) && last_cnt
-					   && (last_cnt < 8)) {
-					memset (tmp, '0', 8);
-					copy_from_user (tmp, buf, last_cnt);
-					mask = 0xffffffff;
-					for (j = 0; j < 8 - last_cnt; j++)
-						mask <<= 1;
-					*q &= ~mask;
-					*q |= simple_strtoul (tmp, 0, 16);
-					buf += last_cnt;
-				} else {
-					char tchars[17]; /* XXX yuck... */
-
-					copy_from_user(tchars, buf, 16);
-					*q = simple_strtoul (tchars, 0, 16);
-					buf += 9;
-				}
-			}
-		}
-		if (!forcelen) {
-			if (op->len < i)
-				op->len = i;
-		} else
-			op->len = i;
-		filp->f_pos += count;
-	}
-write_try_string:
-	if (!(op->flag & OPP_BINARY)) {
-		if (!(op->flag & (OPP_QUOTED | OPP_NOTQUOTED))) {
-			char ctmp;
-
-			/* No way, if somebody starts writing from the middle, 
-			 * we don't know whether he uses quotes around or not 
-			 */
-			if (k > 0)
-				return -EINVAL;
-			__get_user(ctmp, buf);
-			if (ctmp == '\'') {
-				op->flag |= OPP_QUOTED;
-				buf++;
-				count--;
-				filp->f_pos++;
-				if (!count) {
-					op->flag |= OPP_STRING;
-					return 1;
-				}
-			} else
-				op->flag |= OPP_NOTQUOTED;
-		}
-		op->flag |= OPP_STRING;
-		if (op->alloclen <= count + filp->f_pos) {
-			b = kmalloc (sizeof (openprom_property)
-				     + 2 * (count + filp->f_pos), GFP_KERNEL);
-			if (!b)
-				return -ENOMEM;
-			memcpy (b, filp->private_data,
-				sizeof (openprom_property)
-				+ strlen (op->name) + op->alloclen);
-			memset (((char *)b) + sizeof (openprom_property)
-				+ strlen (op->name) + op->alloclen, 
-				0, 2*(count - filp->f_pos) - op->alloclen);
-			op = (openprom_property *)b;
-			op->alloclen = 2*(count + filp->f_pos);
-			b = filp->private_data;
-			filp->private_data = (void *)op;
-			kfree (b);
-		}
-		p = op->value + filp->f_pos - ((op->flag & OPP_QUOTED) ? 1 : 0);
-		copy_from_user (p, buf, count);
-		op->flag |= OPP_DIRTY;
-		for (i = 0; i < count; i++, p++)
-			if (*p == '\n') {
-				*p = 0;
-				break;
-			}
-		if (i < count) {
-			op->len = p - op->value;
-			filp->f_pos += i + 1;
-			if ((p > op->value) && (op->flag & OPP_QUOTED)
-			    && (*(p - 1) == '\''))
-				op->len--;
-		} else {
-			if (p - op->value > op->len)
-				op->len = p - op->value;
-			filp->f_pos += count;
-		}
-	}
-	return filp->f_pos - k;
-}
-
-int property_release (struct inode *inode, struct file *filp)
-{
-	openprom_property *op = (openprom_property *)filp->private_data;
-	unsigned long flags;
-	int error;
-	u32 node;
-	
-	if (!op)
-		return 0;
-	node = nodes[(u16)((long)inode->u.generic_ip)].node;
-	if ((u16)((long)inode->u.generic_ip) == aliases) {
-		if ((op->flag & OPP_DIRTY) && (op->flag & OPP_STRING)) {
-			char *p = op->name;
-			int i = (op->value - op->name) - strlen (op->name) - 1;
-			op->value [op->len] = 0;
-			*(op->value - 1) = ' ';
-			if (i) {
-				for (p = op->value - i - 2; p >= op->name; p--)
-					p[i] = *p;
-				p = op->name + i;
-			}
-			memcpy (p - 8, "nvalias ", 8);
-			prom_feval (p - 8);
-		}
-	} else if (op->flag & OPP_DIRTY) {
-		if (op->flag & OPP_STRING) {
-			op->value [op->len] = 0;
-			save_and_cli (flags);
-			error = prom_setprop (node, op->name,
-					      op->value, op->len + 1);
-			restore_flags (flags);
-			if (error <= 0)
-				printk (KERN_WARNING "/proc/openprom: "
-					"Couldn't write property %s\n",
-					op->name);
-		} else if ((op->flag & OPP_BINARY) || !op->len) {
-			save_and_cli (flags);
-			error = prom_setprop (node, op->name,
-					      op->value, op->len);
-			restore_flags (flags);
-			if (error <= 0)
-				printk (KERN_WARNING "/proc/openprom: "
-					"Couldn't write property %s\n",
-					op->name);
-		} else {
-			printk (KERN_WARNING "/proc/openprom: "
-				"Unknown property type of %s\n",
-				op->name);
-		}
-	}
-	kfree (filp->private_data);
-	return 0;
-}
-
-static struct file_operations openpromfs_prop_ops = {
-	NULL,			/* lseek - default */
-	property_read,		/* read */
-	property_write,		/* write - bad */
-	NULL,			/* readdir */
-	NULL,			/* poll - default */
-	NULL,			/* ioctl - default */
-	NULL,			/* mmap */
-	NULL,			/* no special open code */
-	NULL,			/* flush */
-	property_release,	/* no special release code */
-	NULL			/* can't fsync */
-};
-
-static struct inode_operations openpromfs_prop_inode_ops = {
-	&openpromfs_prop_ops,	/* default property file-ops */
-};
-
-static struct file_operations openpromfs_nodenum_ops = {
-	NULL,			/* lseek - default */
-	nodenum_read,		/* read */
-	NULL,			/* write - bad */
-	NULL,			/* readdir */
-	NULL,			/* poll - default */
-	NULL,			/* ioctl - default */
-	NULL,			/* mmap */
-	NULL,			/* no special open code */
-	NULL,			/* flush */
-	NULL,			/* no special release code */
-	NULL			/* can't fsync */
-};
-
-static struct inode_operations openpromfs_nodenum_inode_ops = {
-	&openpromfs_nodenum_ops,/* default .node file-ops */
-};
-
-static struct file_operations openprom_alias_operations = {
-	NULL,			/* lseek - default */
-	NULL,			/* read - bad */
-	NULL,			/* write - bad */
-	openpromfs_readdir,	/* readdir */
-	NULL,			/* poll - default */
-	NULL,			/* ioctl - default */
-	NULL,			/* mmap */
-	NULL,			/* no special open code */
-	NULL,			/* flush */
-	NULL,			/* no special release code */
-	NULL			/* can't fsync */
-};
-
-static struct inode_operations openprom_alias_inode_operations = {
-	&openprom_alias_operations,/* default aliases directory file-ops */
-	openpromfs_create,	/* create */
-	openpromfs_lookup,	/* lookup */
-	NULL,			/* link */
-	openpromfs_unlink,	/* unlink */
-	NULL,			/* symlink */
-	NULL,			/* mkdir */
-	NULL,			/* rmdir */
-	NULL,			/* mknod */
-	NULL,			/* rename */
-	NULL,			/* readlink */
-	NULL,			/* follow_link */
-	NULL,			/* get_block */
-	NULL,			/* readpage */
-	NULL,			/* writepage */
-	NULL,			/* truncate */
-	NULL,			/* permission */
-	NULL			/* revalidate */
-};
-
-extern struct inode_operations openprom_inode_operations;
-
-static int lookup_children(u16 n, const char * name, int len)
-{
-	int ret;
-	u16 node;
-	for (; n != 0xffff; n = nodes[n].next) {
-		node = nodes[n].child;
-		if (node != 0xffff) {
-			char buffer[128];
-			int i;
-			char *p;
-			
-			while (node != 0xffff) {
-				if (prom_getname (nodes[node].node,
-						  buffer, 128) >= 0) {
-					i = strlen (buffer);
-					if ((len == i)
-					    && !strncmp (buffer, name, len))
-						return NODE2INO(node);
-					p = strchr (buffer, '@');
-					if (p && (len == p - buffer)
-					    && !strncmp (buffer, name, len))
-						return NODE2INO(node);
-				}
-				node = nodes[node].next;
-			}
-		} else
-			continue;
-		ret = lookup_children (nodes[n].child, name, len);
-		if (ret) return ret;
-	}
-	return 0;
-}
-
-static struct dentry *openpromfs_lookup(struct inode * dir, struct dentry *dentry)
-{
-	int ino = 0;
-#define OPFSL_DIR	0
-#define OPFSL_PROPERTY	1
-#define OPFSL_NODENUM	2
-#define OPFSL_DEVICE	3
-	int type = 0;
-	char buffer[128];
-	char *p;
-	const char *name;
-	u32 n;
-	u16 dirnode;
-	unsigned int len;
-	int i;
-	struct inode *inode;
-	struct openpromfs_dev *d = NULL;
-	char buffer2[64];
-	
-	inode = NULL;
-	name = dentry->d_name.name;
-	len = dentry->d_name.len;
-	if (name [0] == '.' && len == 5 && !strncmp (name + 1, "node", 4)) {
-		ino = NODEP2INO(NODE(dir->i_ino).first_prop);
-		type = OPFSL_NODENUM;
-	}
-	if (!ino) {
-		u16 node = NODE(dir->i_ino).child;
-		while (node != 0xffff) {
-			if (prom_getname (nodes[node].node, buffer, 128) >= 0) {
-				i = strlen (buffer);
-				if (len == i && !strncmp (buffer, name, len)) {
-					ino = NODE2INO(node);
-					type = OPFSL_DIR;
-					break;
-				}
-				p = strchr (buffer, '@');
-				if (p && (len == p - buffer)
-				    && !strncmp (buffer, name, len)) {
-					ino = NODE2INO(node);
-					type = OPFSL_DIR;
-					break;
-				}
-			}
-			node = nodes[node].next;
-		}
-	}
-	n = NODE(dir->i_ino).node;
-	dirnode = dir->i_ino - PROC_OPENPROM_FIRST;
-	if (!ino) {
-		int j = NODEP2INO(NODE(dir->i_ino).first_prop);
-		if (dirnode != aliases) {
-			for (p = prom_firstprop (n, buffer2);
-			     p && *p;
-			     p = prom_nextprop (n, p, buffer2)) {
-				j++;
-				if ((len == strlen (p))
-				    && !strncmp (p, name, len)) {
-					ino = j;
-					type = OPFSL_PROPERTY;
-					break;
-				}
-			}
-		} else {
-			int k;
-			for (k = 0; k < aliases_nodes; k++) {
-				j++;
-				if (alias_names [k]
-				    && (len == strlen (alias_names [k]))
-				    && !strncmp (alias_names [k], name, len)) {
-					ino = j;
-					type = OPFSL_PROPERTY;
-					break;
-				}
-			}
-		}
-	}
-	if (!ino) {
-		for (d = openprom_devices; d; d = d->next)
-			if ((d->node == n) && (strlen (d->name) == len)
-			    && !strncmp (d->name, name, len)) {
-				ino = d->inode;
-				type = OPFSL_DEVICE;
-				break;
-			}
-	}
-	if (!ino) {
-		ino = lookup_children (NODE(dir->i_ino).child, name, len);
-		if (ino)
-			type = OPFSL_DIR;
-		else
-			return ERR_PTR(-ENOENT);
-	}
-	inode = iget (dir->i_sb, ino, 0);
-	if (!inode)
-		return ERR_PTR(-EINVAL);
-	switch (type) {
-	case OPFSL_DIR:
-		inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
-		if (ino == PROC_OPENPROM_FIRST + aliases) {
-			inode->i_mode |= S_IWUSR;
-			inode->i_op = &openprom_alias_inode_operations;
-		} else
-			inode->i_op = &openprom_inode_operations;
-		inode->i_nlink = 2;
-		break;
-	case OPFSL_NODENUM:
-		inode->i_mode = S_IFREG | S_IRUGO;
-		inode->i_op = &openpromfs_nodenum_inode_ops;
-		inode->i_nlink = 1;
-		inode->u.generic_ip = (void *)(long)(n);
-		break;
-	case OPFSL_PROPERTY:
-		if ((dirnode == options) && (len == 17)
-		    && !strncmp (name, "security-password", 17))
-			inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR;
-		else {
-			inode->i_mode = S_IFREG | S_IRUGO;
-			if (dirnode == options || dirnode == aliases) {
-				if (len != 4 || strncmp (name, "name", 4))
-					inode->i_mode |= S_IWUSR;
-			}
-		}
-		inode->i_op = &openpromfs_prop_inode_ops;
-		inode->i_nlink = 1;
-		if (inode->i_size < 0)
-			inode->i_size = 0;
-		inode->u.generic_ip = (void *)(long)(((u16)dirnode) | 
-			(((u16)(ino - NODEP2INO(NODE(dir->i_ino).first_prop) - 1)) << 16));
-		break;
-	case OPFSL_DEVICE:
-		init_special_inode(d->mode, kdev_to_nr(d->rdev));
-	}		
-
-	inode->i_gid = 0;
-	inode->i_uid = 0;
-
-	d_add(dentry, inode);
-	return NULL;
-}
-
-static int openpromfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
-{
-	struct inode *inode = filp->f_dentry->d_inode;
-	unsigned int ino;
-	u32 n;
-	int i, j;
-	char buffer[128];
-	u16 node;
-	char *p;
-	struct openpromfs_dev *d;
-	char buffer2[64];
-	
-	ino = inode->i_ino;
-	i = filp->f_pos;
-	switch (i) {
-	case 0:
-		if (filldir(dirent, ".", 1, i, ino) < 0) return 0;
-		i++;
-		filp->f_pos++;
-		/* fall thru */
-	case 1:
-		if (filldir(dirent, "..", 2, i, 
-			(NODE(ino).parent == 0xffff) ? 
-			PROC_ROOT_INO : NODE2INO(NODE(ino).parent)) < 0) 
-			return 0;
-		i++;
-		filp->f_pos++;
-		/* fall thru */
-	default:
-		i -= 2;
-		node = NODE(ino).child;
-		while (i && node != 0xffff) {
-			node = nodes[node].next;
-			i--;
-		}
-		while (node != 0xffff) {
-			if (prom_getname (nodes[node].node, buffer, 128) < 0)
-				return 0;
-			if (filldir(dirent, buffer, strlen(buffer),
-				    filp->f_pos, NODE2INO(node)) < 0)
-				return 0;
-			filp->f_pos++;
-			node = nodes[node].next;
-		}
-		j = NODEP2INO(NODE(ino).first_prop);
-		if (!i) {
-			if (filldir(dirent, ".node", 5, filp->f_pos, j) < 0)
-				return 0;
-			filp->f_pos++;
-		} else
-			i--;
-		n = NODE(ino).node;
-		if (ino == PROC_OPENPROM_FIRST + aliases) {
-			for (j++; i < aliases_nodes; i++, j++) {
-				if (alias_names [i]) {
-					if (filldir (dirent, alias_names [i], 
-						strlen (alias_names [i]), 
-						filp->f_pos, j) < 0) return 0;
-					filp->f_pos++;
-				}
-			}
-		} else {
-			for (p = prom_firstprop (n, buffer2);
-			     p && *p;
-			     p = prom_nextprop (n, p, buffer2)) {
-				j++;
-				if (i) i--;
-				else {
-					if (filldir(dirent, p, strlen(p),
-						    filp->f_pos, j) < 0)
-						return 0;
-					filp->f_pos++;
-				}
-			}
-		}
-		for (d = openprom_devices; d; d = d->next) {
-			if (d->node == n) {
-				if (i) i--;
-				else {
-					if (filldir(dirent, d->name,
-						    strlen(d->name),
-						    filp->f_pos, d->inode) < 0)
-						return 0;
-					filp->f_pos++;
-				}
-			}
-		}
-	}
-	return 0;
-}
-
-static int openpromfs_create (struct inode *dir, struct dentry *dentry, int mode)
-{
-	char *p;
-	struct inode *inode;
-	
-	if (!dir)
-		return -ENOENT;
-	if (dentry->d_name.len > 256)
-		return -EINVAL;
-	if (aliases_nodes == ALIASES_NNODES)
-		return -EIO;
-	p = kmalloc (dentry->d_name.len + 1, GFP_KERNEL);
-	if (!p)
-		return -ENOMEM;
-	strncpy (p, dentry->d_name.name, dentry->d_name.len);
-	p [dentry->d_name.len] = 0;
-	alias_names [aliases_nodes++] = p;
-	inode = iget (dir->i_sb,
-			NODEP2INO(NODE(dir->i_ino).first_prop) + aliases_nodes);
-	if (!inode)
-		return -EINVAL;
-	inode->i_mode = S_IFREG | S_IRUGO | S_IWUSR;
-	inode->i_op = &openpromfs_prop_inode_ops;
-	inode->i_nlink = 1;
-	if (inode->i_size < 0) inode->i_size = 0;
-	inode->u.generic_ip = (void *)(long)(((u16)aliases) | 
-			(((u16)(aliases_nodes - 1)) << 16));
-	d_instantiate(dentry, inode);
-	return 0;
-}
-
-static int openpromfs_unlink (struct inode *dir, struct dentry *dentry)
-{
-	unsigned int len;
-	char *p;
-	const char *name;
-	int i;
-	
-	name = dentry->d_name.name;
-	len = dentry->d_name.len;
-	for (i = 0; i < aliases_nodes; i++)
-		if ((strlen (alias_names [i]) == len)
-		    && !strncmp (name, alias_names[i], len)) {
-			char buffer[512];
-			
-			p = alias_names [i];
-			alias_names [i] = NULL;
-			kfree (p);
-			strcpy (buffer, "nvunalias ");
-			memcpy (buffer + 10, name, len);
-			buffer [10 + len] = 0;
-			prom_feval (buffer);
-		}
-	d_delete(dentry);
-	return 0;
-}
-
-/* {{{ init section */
-#ifndef MODULE
-static int __init check_space (u16 n)
-#else
-static int check_space (u16 n)
-#endif
-{
-	unsigned long pages;
-
-	if ((1 << alloced) * PAGE_SIZE < (n + 2) * sizeof(openpromfs_node)) {
-		pages = __get_free_pages (GFP_KERNEL, alloced + 1);
-		if (!pages)
-			return -1;
-
-		if (nodes) {
-			memcpy ((char *)pages, (char *)nodes,
-				(1 << alloced) * PAGE_SIZE);
-			free_pages ((unsigned long)nodes, alloced);
-		}
-		alloced++;
-		nodes = (openpromfs_node *)pages;
-	}
-	return 0;
-}
-
-#ifndef MODULE
-static u16 __init get_nodes (u16 parent, u32 node)
-#else
-static u16 get_nodes (u16 parent, u32 node)
-#endif
-{
-	char *p;
-	u16 n = last_node++, i;
-	char buffer[64];
-
-	if (check_space (n) < 0)
-		return 0xffff;
-	nodes[n].parent = parent;
-	nodes[n].node = node;
-	nodes[n].next = 0xffff;
-	nodes[n].child = 0xffff;
-	nodes[n].first_prop = first_prop++;
-	if (!parent) {
-		char buffer[8];
-		int j;
-		
-		if ((j = prom_getproperty (node, "name", buffer, 8)) >= 0) {
-		    buffer[j] = 0;
-		    if (!strcmp (buffer, "options"))
-			options = n;
-		    else if (!strcmp (buffer, "aliases"))
-		        aliases = n;
-		}
-	}
-	if (n != aliases)
-		for (p = prom_firstprop (node, buffer);
-		     p && p != (char *)-1 && *p;
-		     p = prom_nextprop (node, p, buffer))
-			first_prop++;
-	else {
-		char *q;
-		for (p = prom_firstprop (node, buffer);
-		     p && p != (char *)-1 && *p;
-		     p = prom_nextprop (node, p, buffer)) {
-			if (aliases_nodes == ALIASES_NNODES)
-				break;
-			for (i = 0; i < aliases_nodes; i++)
-				if (!strcmp (p, alias_names [i]))
-					break;
-			if (i < aliases_nodes)
-				continue;
-			q = kmalloc (strlen (p) + 1, GFP_KERNEL);
-			if (!q)
-				return 0xffff;
-			strcpy (q, p);
-			alias_names [aliases_nodes++] = q;
-		}
-		first_prop += ALIASES_NNODES;
-	}
-	node = prom_getchild (node);
-	if (node) {
-		parent = get_nodes (n, node);
-		if (parent == 0xffff)
-			return 0xffff;
-		nodes[n].child = parent;
-		while ((node = prom_getsibling (node)) != 0) {
-			i = get_nodes (n, node);
-			if (i == 0xffff)
-				return 0xffff;
-			nodes[parent].next = i;
-			parent = i;
-		}
-	}
-	return n;
-}
-
-
-#ifdef MODULE
-void openpromfs_use (struct inode *inode, int inc)
-{
-	static int root_fresh = 1;
-	static int dec_first = 1;
-	if (inc) {
-		if (inode->i_count == 1)
-			MOD_INC_USE_COUNT;
-		else if (root_fresh && inode->i_ino == PROC_OPENPROM_FIRST) {
-			root_fresh = 0;
-			MOD_INC_USE_COUNT;
-		}
-	} else {
-		if (inode->i_ino == PROC_OPENPROM_FIRST)
-			root_fresh = 0;
-		if (!dec_first)
-			MOD_DEC_USE_COUNT;
-	}
-	dec_first = 0;
-}
-
-#else
-#define openpromfs_use 0
-#endif
-
-static struct file_operations openprom_operations = {
-	NULL,			/* lseek - default */
-	NULL,			/* read - bad */
-	NULL,			/* write - bad */
-	openpromfs_readdir,	/* readdir */
-};
-
-static struct inode_operations openprom_inode_operations = {
-	&openprom_operations,/* default net directory file-ops */
-	NULL,			/* create */
-	openpromfs_lookup,	/* lookup */
-};
-
-static void openprom_read_inode(struct inode * inode)
-{
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-	if (inode->i_ino == PROC_OPENPROM) {
-		inode->i_op = &openprom_inode_operations;
-	}
-}
-
-static void openprom_put_super(struct super_block *sb)
-{
-	MOD_DEC_USE_COUNT;
-}
-
-static int openprom_statfs(struct super_block *sb, struct statfs *buf, int bufsiz)
-{
-	struct statfs tmp;
-
-	tmp.f_type = PROC_SUPER_MAGIC;		/* FIXME */
-	tmp.f_bsize = PAGE_SIZE/sizeof(long);	/* ??? */
-	tmp.f_blocks = 0;
-	tmp.f_bfree = 0;
-	tmp.f_bavail = 0;
-	tmp.f_files = 0;
-	tmp.f_ffree = 0;
-	tmp.f_namelen = NAME_MAX;
-	return copy_to_user(buf, &tmp, bufsiz) ? -EFAULT : 0;
-}
-
-static struct super_operations openprom_sops = { 
-	openprom_read_inode,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	openprom_put_super,
-	NULL,
-	openprom_statfs,
-	NULL
-};
-
-struct super_block *openprom_read_super(struct super_block *s,void *data, 
-				    int silent)
-{
-	struct inode * root_inode;
-
-	MOD_INC_USE_COUNT;
-	lock_super(s);
-	s->s_blocksize = 1024;
-	s->s_blocksize_bits = 10;
-	s->s_magic = PROC_SUPER_MAGIC;	/* FIXME */
-	s->s_op = &openprom_sops;
-	root_inode = iget(s, PROC_OPENPROM);
-	if (!root_inode)
-		goto out_no_root;
-	s->s_root = d_alloc_root(root_inode);
-	if (!s->s_root)
-		goto out_no_root;
-	unlock_super(s);
-	return s;
-
-out_no_root:
-	printk("proc_read_super: get root inode failed\n");
-	iput(root_inode);
-	s->s_dev = 0;
-	unlock_super(s);
-	return NULL;
-}
-
-static struct file_system_type openprom_fs_type = {
-	"openprom", 
-	0,
-	openprom_read_super, 
-	NULL
-};
-
-static int init_openprom_fs(void)
-{
-	nodes = (openpromfs_node *)__get_free_pages(GFP_KERNEL, 0);
-	if (!nodes) {
-		printk (KERN_WARNING "/proc/openprom: can't get free page\n");
-		return -EIO;
-	}
-	if (get_nodes (0xffff, prom_root_node) == 0xffff) {
-		printk (KERN_WARNING "/proc/openprom: couldn't setup tree\n");
-		return -EIO;
-	}
-	nodes[last_node].first_prop = first_prop;
-	return register_filesystem(&openprom_fs_type);
-}
-
-#ifdef MODULE
-
-EXPORT_NO_SYMBOLS;
-
-int init_module (void)
-{
-	return init_openprom_fs();
-}
-
-#else
-
-void __init openpromfs_init (void)
-{
-	init_openprom_fs();
-}
-#endif
-
-#ifdef MODULE
-void cleanup_module (void)
-{
-	int i;
-	unregister_filesystem(&openprom_fs_type);
-	free_pages ((unsigned long)nodes, alloced);
-	for (i = 0; i < aliases_nodes; i++)
-		if (alias_names [i])
-			kfree (alias_names [i]);
-	nodes = NULL;
-}
-#endif