[OPENPROMFS]: Rewrite using in-kernel device tree and seq_file.
We lose property writing functionality for the time being, but
that will be easy to add back. The code and framework is so
much simpler now.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index efc7c911..93a56bd 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -1,5 +1,4 @@
-/* $Id: inode.c,v 1.15 2001/11/12 09:43:39 davem Exp $
- * openpromfs.c: /proc/openprom handling routines
+/* inode.c: /proc/openprom handling routines
*
* Copyright (C) 1996-1999 Jakub Jelinek (jakub@redhat.com)
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
@@ -12,762 +11,245 @@
#include <linux/openprom_fs.h>
#include <linux/init.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
+#include <asm/prom.h>
#include <asm/uaccess.h>
-#define ALIASES_NNODES 64
+static DEFINE_MUTEX(op_mutex);
-typedef struct {
- u16 parent;
- u16 next;
- u16 child;
- u16 first_prop;
- u32 node;
-} openpromfs_node;
+#define OPENPROM_ROOT_INO 0
-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;
+enum op_inode_type {
+ op_inode_node,
+ op_inode_prop,
+};
-static openpromfs_node *nodes;
-static int alloced;
-static u16 last_node;
-static u16 first_prop;
-static u16 options = 0xffff;
-static u16 aliases = 0xffff;
-static int aliases_nodes;
-static char *alias_names [ALIASES_NNODES];
+union op_inode_data {
+ struct device_node *node;
+ struct property *prop;
+};
-#define OPENPROM_ROOT_INO 16
-#define OPENPROM_FIRST_INO OPENPROM_ROOT_INO
-#define NODE(ino) nodes[ino - OPENPROM_FIRST_INO]
-#define NODE2INO(node) (node + OPENPROM_FIRST_INO)
-#define NODEP2INO(no) (no + OPENPROM_FIRST_INO + last_node)
+struct op_inode_info {
+ struct inode vfs_inode;
+ enum op_inode_type type;
+ union op_inode_data u;
+};
-static int openpromfs_create (struct inode *, struct dentry *, int, struct nameidata *);
-static int openpromfs_readdir(struct file *, void *, filldir_t);
-static struct dentry *openpromfs_lookup(struct inode *, struct dentry *dentry, struct nameidata *nd);
-static int openpromfs_unlink (struct inode *, struct dentry *dentry);
-
-static inline u16 ptr_nod(void *p)
+static inline struct op_inode_info *OP_I(struct inode *inode)
{
- return (long)p & 0xFFFF;
+ return container_of(inode, struct op_inode_info, vfs_inode);
}
-static ssize_t nodenum_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+static int is_string(unsigned char *p, int len)
{
- struct inode *inode = file->f_dentry->d_inode;
- char buffer[10];
-
- if (count < 0 || !inode->u.generic_ip)
- return -EINVAL;
- sprintf (buffer, "%8.8lx\n", (long)inode->u.generic_ip);
- if (file->f_pos >= 9)
+ int i;
+
+ for (i = 0; i < len; i++) {
+ unsigned char val = p[i];
+
+ if ((i && !val) ||
+ (val >= ' ' && val <= '~'))
+ continue;
+
return 0;
- if (count > 9 - file->f_pos)
- count = 9 - file->f_pos;
- if (copy_to_user(buf, buffer + file->f_pos, count))
- return -EFAULT;
- *ppos += count;
- return count;
+ }
+
+ return 1;
}
-static ssize_t property_read(struct file *filp, char __user *buf,
- size_t count, loff_t *ppos)
+static int property_show(struct seq_file *f, void *v)
{
- 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->private_data) {
- node = nodes[ptr_nod(inode->u.generic_ip)].node;
- i = ((u32)(long)inode->u.generic_ip) >> 16;
- if (ptr_nod(inode->u.generic_ip) == aliases) {
- if (i >= aliases_nodes)
- p = NULL;
- 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 (ptr_nod(inode->u.generic_ip) == aliases)
- i = 0;
- else
- return -EIO;
+ struct property *prop = f->private;
+ void *pval;
+ int len;
+
+ len = prop->length;
+ pval = prop->value;
+
+ if (is_string(pval, len)) {
+ while (len > 0) {
+ int n = strlen(pval);
+
+ seq_printf(f, "%s", (char *) pval);
+
+ /* Skip over the NULL byte too. */
+ pval += n + 1;
+ len -= n + 1;
+
+ if (len > 0)
+ seq_printf(f, " + ");
}
- 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 = 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 = NULL, 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 = filp->private_data;
- if (!count || !(op->len || (op->flag & OPP_ASCIIZ)))
- return 0;
- if (*ppos >= 0xffffff || count >= 0xffffff)
- return -EINVAL;
- 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 = *ppos;
- if (k >= i) return 0;
- if (count > i - k) count = i - k;
- if (op->flag & OPP_STRING) {
- if (!k) {
- if (put_user('\'', buf))
- return -EFAULT;
- k++;
- count--;
- }
-
- if (k + count >= i - 2)
- j = i - 2 - k;
- else
- j = count;
-
- if (j >= 0) {
- if (copy_to_user(buf + k - *ppos,
- op->value + k - 1, j))
- return -EFAULT;
- count -= j;
- k += j;
- }
-
- if (count) {
- if (put_user('\'', &buf [k++ - *ppos]))
- return -EFAULT;
- }
- if (count > 1) {
- if (put_user('\n', &buf [k++ - *ppos]))
- return -EFAULT;
- }
- } 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");
-
- if (copy_to_user(buf, tmp + k, count))
- return -EFAULT;
-
- 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);
- if (copy_to_user(buf, buffer + first_off,
- last_cnt - first_off))
- return -EFAULT;
- buf += last_cnt - first_off;
- } else {
- for (q = first; q <= last; q++) {
- sprintf (buffer, "%08x.", *q);
- if (q == first) {
- if (copy_to_user(buf, buffer + first_off,
- 9 - first_off))
- return -EFAULT;
- buf += 9 - first_off;
- } else if (q == last) {
- if (copy_to_user(buf, buffer, last_cnt))
- return -EFAULT;
- buf += last_cnt;
- } else {
- if (copy_to_user(buf, buffer, 9))
- return -EFAULT;
- buf += 9;
- }
- }
- }
-
- if (last == (u32 *)(op->value + op->len - 4) && last_cnt == 9) {
- if (put_user('\n', (buf - 1)))
- return -EFAULT;
- }
-
- k += count;
-
- } else if (op->flag & OPP_HEXSTRING) {
- char buffer[3];
-
- if ((k < i - 1) && (k & 1)) {
- sprintf (buffer, "%02x",
- (unsigned char) *(op->value + (k >> 1)) & 0xff);
- if (put_user(buffer[1], &buf[k++ - *ppos]))
- return -EFAULT;
- count--;
- }
-
- for (; (count > 1) && (k < i - 1); k += 2) {
- sprintf (buffer, "%02x",
- (unsigned char) *(op->value + (k >> 1)) & 0xff);
- if (copy_to_user(buf + k - *ppos, buffer, 2))
- return -EFAULT;
- count -= 2;
- }
-
- if (count && (k < i - 1)) {
- sprintf (buffer, "%02x",
- (unsigned char) *(op->value + (k >> 1)) & 0xff);
- if (put_user(buffer[0], &buf[k++ - *ppos]))
- return -EFAULT;
- count--;
- }
-
- if (count) {
- if (put_user('\n', &buf [k++ - *ppos]))
- return -EFAULT;
- }
- }
- count = k - *ppos;
- *ppos = k;
- return count;
-}
-
-static ssize_t property_write(struct file *filp, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- int i, j, k;
- char *p;
- u32 *q;
- void *b;
- openprom_property *op;
-
- if (*ppos >= 0xffffff || count >= 0xffffff)
- return -EINVAL;
- if (!filp->private_data) {
- i = property_read (filp, NULL, 0, NULL);
- if (i)
- return i;
- }
- k = *ppos;
- op = 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;
- if (get_user(ctmp, &buf[i]))
- return -EFAULT;
- 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;
- if (get_user(ctmp, &buf[i]))
- return -EFAULT;
- 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 (b + sizeof (openprom_property)
- + strlen (op->name) + op->alloclen,
- 0, 2 * i - op->alloclen);
- op = b;
- op->alloclen = 2*i;
- b = filp->private_data;
- filp->private_data = 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);
- if (copy_from_user(tmp + first_off, buf,
- (count + first_off > 8) ?
- 8 - first_off : count))
- return -EFAULT;
- 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, NULL, 16);
- op->flag |= OPP_DIRTY;
+ if (len & 3) {
+ while (len) {
+ len--;
+ if (len)
+ seq_printf(f, "%02x.",
+ *(unsigned char *) pval);
+ else
+ seq_printf(f, "%02x",
+ *(unsigned char *) pval);
+ pval++;
}
} else {
- op->flag |= OPP_DIRTY;
- for (q = first; q < last; q++) {
- if (q == first) {
- if (first_off < 8) {
- memset (tmp, '0', 8);
- if (copy_from_user(tmp + first_off,
- buf,
- 8 - first_off))
- return -EFAULT;
- mask = 0xffffffff;
- for (j = 0; j < first_off; j++)
- mask >>= 1;
- *q &= ~mask;
- *q |= simple_strtoul (tmp,NULL,16);
- }
- buf += 9;
- } else if ((q == last - 1) && last_cnt
- && (last_cnt < 8)) {
- memset (tmp, '0', 8);
- if (copy_from_user(tmp, buf, last_cnt))
- return -EFAULT;
- mask = 0xffffffff;
- for (j = 0; j < 8 - last_cnt; j++)
- mask <<= 1;
- *q &= ~mask;
- *q |= simple_strtoul (tmp, NULL, 16);
- buf += last_cnt;
- } else {
- char tchars[2 * sizeof(long) + 1];
+ while (len >= 4) {
+ len -= 4;
- if (copy_from_user(tchars, buf, sizeof(tchars) - 1))
- return -EFAULT;
- tchars[sizeof(tchars) - 1] = '\0';
- *q = simple_strtoul (tchars, NULL, 16);
- buf += 9;
- }
+ if (len)
+ seq_printf(f, "%08x.",
+ *(unsigned int *) pval);
+ else
+ seq_printf(f, "%08x",
+ *(unsigned int *) pval);
+ pval += 4;
}
}
- if (!forcelen) {
- if (op->len < i)
- op->len = i;
- } else
- op->len = i;
- *ppos += count;
}
-write_try_string:
- if (!(op->flag & OPP_BINARY)) {
- if (!(op->flag & (OPP_QUOTED | OPP_NOTQUOTED))) {
- char ctmp;
+ seq_printf(f, "\n");
- /* 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;
- if (get_user(ctmp, buf))
- return -EFAULT;
- if (ctmp == '\'') {
- op->flag |= OPP_QUOTED;
- buf++;
- count--;
- (*ppos)++;
- if (!count) {
- op->flag |= OPP_STRING;
- return 1;
- }
- } else
- op->flag |= OPP_NOTQUOTED;
- }
- op->flag |= OPP_STRING;
- if (op->alloclen <= count + *ppos) {
- b = kmalloc (sizeof (openprom_property)
- + 2 * (count + *ppos), GFP_KERNEL);
- if (!b)
- return -ENOMEM;
- memcpy (b, filp->private_data,
- sizeof (openprom_property)
- + strlen (op->name) + op->alloclen);
- memset (b + sizeof (openprom_property)
- + strlen (op->name) + op->alloclen,
- 0, 2*(count - *ppos) - op->alloclen);
- op = b;
- op->alloclen = 2*(count + *ppos);
- b = filp->private_data;
- filp->private_data = op;
- kfree (b);
- }
- p = op->value + *ppos - ((op->flag & OPP_QUOTED) ? 1 : 0);
- if (copy_from_user(p, buf, count))
- return -EFAULT;
- 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;
- *ppos += 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;
- *ppos += count;
- }
- }
- return *ppos - k;
-}
-
-int property_release (struct inode *inode, struct file *filp)
-{
- openprom_property *op = filp->private_data;
- int error;
- u32 node;
-
- if (!op)
- return 0;
- lock_kernel();
- node = nodes[ptr_nod(inode->u.generic_ip)].node;
- if (ptr_nod(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;
- error = prom_setprop (node, op->name,
- op->value, op->len + 1);
- if (error <= 0)
- printk (KERN_WARNING "openpromfs: "
- "Couldn't write property %s\n",
- op->name);
- } else if ((op->flag & OPP_BINARY) || !op->len) {
- error = prom_setprop (node, op->name,
- op->value, op->len);
- if (error <= 0)
- printk (KERN_WARNING "openpromfs: "
- "Couldn't write property %s\n",
- op->name);
- } else {
- printk (KERN_WARNING "openpromfs: "
- "Unknown property type of %s\n",
- op->name);
- }
- }
- unlock_kernel();
- kfree (filp->private_data);
return 0;
}
-static const struct file_operations openpromfs_prop_ops = {
- .read = property_read,
- .write = property_write,
- .release = property_release,
+static void *property_start(struct seq_file *f, loff_t *pos)
+{
+ if (*pos == 0)
+ return pos;
+ return NULL;
+}
+
+static void *property_next(struct seq_file *f, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return NULL;
+}
+
+static void property_stop(struct seq_file *f, void *v)
+{
+ /* Nothing to do */
+}
+
+static struct seq_operations property_op = {
+ .start = property_start,
+ .next = property_next,
+ .stop = property_stop,
+ .show = property_show
};
-static const struct file_operations openpromfs_nodenum_ops = {
- .read = nodenum_read,
+static int property_open(struct inode *inode, struct file *file)
+{
+ struct op_inode_info *oi = OP_I(inode);
+ int ret;
+
+ BUG_ON(oi->type != op_inode_prop);
+
+ ret = seq_open(file, &property_op);
+ if (!ret) {
+ struct seq_file *m = file->private_data;
+ m->private = oi->u.prop;
+ }
+ return ret;
+}
+
+static const struct file_operations openpromfs_prop_ops = {
+ .open = property_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
};
+static int openpromfs_readdir(struct file *, void *, filldir_t);
+
static const struct file_operations openprom_operations = {
.read = generic_read_dir,
.readdir = openpromfs_readdir,
};
-static struct inode_operations openprom_alias_inode_operations = {
- .create = openpromfs_create,
- .lookup = openpromfs_lookup,
- .unlink = openpromfs_unlink,
-};
+static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, struct nameidata *);
static struct inode_operations openprom_inode_operations = {
.lookup = openpromfs_lookup,
};
-static int lookup_children(u16 n, const char * name, int len)
+static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
- 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, struct nameidata *nd)
-{
- int ino = 0;
-#define OPFSL_DIR 0
-#define OPFSL_PROPERTY 1
-#define OPFSL_NODENUM 2
- int type = 0;
- char buffer[128];
- char *p;
+ struct op_inode_info *ent_oi, *oi = OP_I(dir);
+ struct device_node *dp, *child;
+ struct property *prop;
+ enum op_inode_type ent_type;
+ union op_inode_data ent_data;
const char *name;
- u32 n;
- u16 dirnode;
- unsigned int len;
- int i;
struct inode *inode;
- char buffer2[64];
+ unsigned int ino;
+ int len;
- inode = NULL;
+ BUG_ON(oi->type != op_inode_node);
+
+ dp = oi->u.node;
+
name = dentry->d_name.name;
len = dentry->d_name.len;
- lock_kernel();
- 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;
+
+ mutex_lock(&op_mutex);
+
+ child = dp->child;
+ while (child) {
+ int n = strlen(child->path_component_name);
+
+ if (len == n &&
+ !strncmp(child->path_component_name, name, len)) {
+ ent_type = op_inode_node;
+ ent_data.node = child;
+ ino = child->unique_id;
+ goto found;
}
+ child = child->sibling;
}
- n = NODE(dir->i_ino).node;
- dirnode = dir->i_ino - OPENPROM_FIRST_INO;
- 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;
- }
- }
+
+ prop = dp->properties;
+ while (prop) {
+ int n = strlen(prop->name);
+
+ if (len == n && !strncmp(prop->name, name, len)) {
+ ent_type = op_inode_prop;
+ ent_data.prop = prop;
+ ino = prop->unique_id;
+ goto found;
}
+
+ prop = prop->next;
}
- if (!ino) {
- ino = lookup_children (NODE(dir->i_ino).child, name, len);
- if (ino)
- type = OPFSL_DIR;
- else {
- unlock_kernel();
- return ERR_PTR(-ENOENT);
- }
- }
- inode = iget (dir->i_sb, ino);
- unlock_kernel();
+
+ mutex_unlock(&op_mutex);
+ return ERR_PTR(-ENOENT);
+
+found:
+ inode = iget(dir->i_sb, ino);
+ mutex_unlock(&op_mutex);
if (!inode)
return ERR_PTR(-EINVAL);
- switch (type) {
- case OPFSL_DIR:
+ ent_oi = OP_I(inode);
+ ent_oi->type = ent_type;
+ ent_oi->u = ent_data;
+
+ switch (ent_type) {
+ case op_inode_node:
inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
- if (ino == OPENPROM_FIRST_INO + aliases) {
- inode->i_mode |= S_IWUSR;
- inode->i_op = &openprom_alias_inode_operations;
- } else
- inode->i_op = &openprom_inode_operations;
+ inode->i_op = &openprom_inode_operations;
inode->i_fop = &openprom_operations;
inode->i_nlink = 2;
break;
- case OPFSL_NODENUM:
- inode->i_mode = S_IFREG | S_IRUGO;
- inode->i_fop = &openpromfs_nodenum_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))
+ case op_inode_prop:
+ if (!strcmp(dp->name, "options") && (len == 17) &&
+ !strncmp (name, "security-password", 17))
inode->i_mode = S_IFREG | S_IRUSR | S_IWUSR;
- else {
+ 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_fop = &openpromfs_prop_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));
+ inode->i_size = ent_oi->u.prop->length;
break;
}
@@ -781,237 +263,89 @@
static int openpromfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
+ struct op_inode_info *oi = OP_I(inode);
+ struct device_node *dp = oi->u.node;
+ struct device_node *child;
+ struct property *prop;
unsigned int ino;
- u32 n;
- int i, j;
- char buffer[128];
- u16 node;
- char *p;
- char buffer2[64];
+ int i;
- lock_kernel();
+ mutex_lock(&op_mutex);
ino = inode->i_ino;
i = filp->f_pos;
switch (i) {
case 0:
- if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0) goto out;
+ if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
+ goto out;
i++;
filp->f_pos++;
/* fall thru */
case 1:
- if (filldir(dirent, "..", 2, i,
- (NODE(ino).parent == 0xffff) ?
- OPENPROM_ROOT_INO : NODE2INO(NODE(ino).parent), DT_DIR) < 0)
+ if (filldir(dirent, "..", 2, i,
+ (dp->parent == NULL ?
+ OPENPROM_ROOT_INO :
+ dp->parent->unique_id), DT_DIR) < 0)
goto out;
i++;
filp->f_pos++;
/* fall thru */
default:
i -= 2;
- node = NODE(ino).child;
- while (i && node != 0xffff) {
- node = nodes[node].next;
+
+ /* First, the children nodes as directories. */
+ child = dp->child;
+ while (i && child) {
+ child = child->sibling;
i--;
}
- while (node != 0xffff) {
- if (prom_getname (nodes[node].node, buffer, 128) < 0)
+ while (child) {
+ if (filldir(dirent,
+ child->path_component_name,
+ strlen(child->path_component_name),
+ filp->f_pos, child->unique_id, DT_DIR) < 0)
goto out;
- if (filldir(dirent, buffer, strlen(buffer),
- filp->f_pos, NODE2INO(node), DT_DIR) < 0)
- goto out;
+
filp->f_pos++;
- node = nodes[node].next;
+ child = child->sibling;
}
- j = NODEP2INO(NODE(ino).first_prop);
- if (!i) {
- if (filldir(dirent, ".node", 5, filp->f_pos, j, DT_REG) < 0)
- goto out;
- filp->f_pos++;
- } else
+
+ /* Next, the properties as files. */
+ prop = dp->properties;
+ while (i && prop) {
+ prop = prop->next;
i--;
- n = NODE(ino).node;
- if (ino == OPENPROM_FIRST_INO + 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, DT_REG) < 0) goto out;
- 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, DT_REG) < 0)
- goto out;
- filp->f_pos++;
- }
- }
+ }
+ while (prop) {
+ if (filldir(dirent, prop->name, strlen(prop->name),
+ filp->f_pos, prop->unique_id, DT_REG) < 0)
+ goto out;
+
+ filp->f_pos++;
+ prop = prop->next;
}
}
out:
- unlock_kernel();
+ mutex_unlock(&op_mutex);
return 0;
}
-static int openpromfs_create (struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
+static kmem_cache_t *op_inode_cachep;
+
+static struct inode *openprom_alloc_inode(struct super_block *sb)
{
- char *p;
- struct inode *inode;
-
- if (!dir)
- return -ENOENT;
- if (dentry->d_name.len > 256)
- return -EINVAL;
- 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;
- lock_kernel();
- if (aliases_nodes == ALIASES_NNODES) {
- kfree(p);
- unlock_kernel();
- return -EIO;
- }
- alias_names [aliases_nodes++] = p;
- inode = iget (dir->i_sb,
- NODEP2INO(NODE(dir->i_ino).first_prop) + aliases_nodes);
- if (!inode) {
- unlock_kernel();
- return -EINVAL;
- }
- inode->i_mode = S_IFREG | S_IRUGO | S_IWUSR;
- inode->i_fop = &openpromfs_prop_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));
- unlock_kernel();
- d_instantiate(dentry, inode);
- return 0;
+ struct op_inode_info *oi;
+
+ oi = kmem_cache_alloc(op_inode_cachep, SLAB_KERNEL);
+ if (!oi)
+ return NULL;
+
+ return &oi->vfs_inode;
}
-static int openpromfs_unlink (struct inode *dir, struct dentry *dentry)
+static void openprom_destroy_inode(struct inode *inode)
{
- unsigned int len;
- char *p;
- const char *name;
- int i;
-
- name = dentry->d_name.name;
- len = dentry->d_name.len;
- lock_kernel();
- 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);
- }
- unlock_kernel();
- return 0;
-}
-
-/* {{{ init section */
-static int __init check_space (u16 n)
-{
- 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, nodes,
- (1 << alloced) * PAGE_SIZE);
- free_pages ((unsigned long)nodes, alloced);
- }
- alloced++;
- nodes = (openpromfs_node *)pages;
- }
- return 0;
-}
-
-static u16 __init get_nodes (u16 parent, u32 node)
-{
- 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;
+ kmem_cache_free(op_inode_cachep, OP_I(inode));
}
static void openprom_read_inode(struct inode * inode)
@@ -1031,6 +365,8 @@
}
static struct super_operations openprom_sops = {
+ .alloc_inode = openprom_alloc_inode,
+ .destroy_inode = openprom_destroy_inode,
.read_inode = openprom_read_inode,
.statfs = simple_statfs,
.remount_fs = openprom_remount,
@@ -1038,7 +374,8 @@
static int openprom_fill_super(struct super_block *s, void *data, int silent)
{
- struct inode * root_inode;
+ struct inode *root_inode;
+ struct op_inode_info *oi;
s->s_flags |= MS_NOATIME;
s->s_blocksize = 1024;
@@ -1049,6 +386,11 @@
root_inode = iget(s, OPENPROM_ROOT_INO);
if (!root_inode)
goto out_no_root;
+
+ oi = OP_I(root_inode);
+ oi->type = op_inode_node;
+ oi->u.node = of_find_node_by_path("/");
+
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto out_no_root;
@@ -1073,29 +415,39 @@
.kill_sb = kill_anon_super,
};
+static void op_inode_init_once(void *data, kmem_cache_t * cachep, unsigned long flags)
+{
+ struct op_inode_info *oi = (struct op_inode_info *) data;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&oi->vfs_inode);
+}
+
static int __init init_openprom_fs(void)
{
- nodes = (openpromfs_node *)__get_free_pages(GFP_KERNEL, 0);
- if (!nodes) {
- printk (KERN_WARNING "openpromfs: can't get free page\n");
- return -EIO;
- }
- if (get_nodes (0xffff, prom_root_node) == 0xffff) {
- printk (KERN_WARNING "openpromfs: couldn't setup tree\n");
- return -EIO;
- }
- nodes[last_node].first_prop = first_prop;
- return register_filesystem(&openprom_fs_type);
+ int err;
+
+ op_inode_cachep = kmem_cache_create("op_inode_cache",
+ sizeof(struct op_inode_info),
+ 0,
+ (SLAB_RECLAIM_ACCOUNT |
+ SLAB_MEM_SPREAD),
+ op_inode_init_once, NULL);
+ if (!op_inode_cachep)
+ return -ENOMEM;
+
+ err = register_filesystem(&openprom_fs_type);
+ if (err)
+ kmem_cache_destroy(op_inode_cachep);
+
+ return err;
}
static void __exit exit_openprom_fs(void)
{
- int i;
unregister_filesystem(&openprom_fs_type);
- free_pages ((unsigned long)nodes, alloced);
- for (i = 0; i < aliases_nodes; i++)
- kfree (alias_names [i]);
- nodes = NULL;
+ kmem_cache_destroy(op_inode_cachep);
}
module_init(init_openprom_fs)