patch-2.3.35 linux/fs/proc/openpromfs.c
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- 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
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)