diff options
| -rw-r--r-- | fs/openpromfs/inode.c | 1158 |
1 files changed, 255 insertions, 903 deletions
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index efc7c91128a..93a56bd4a2b 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 - -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; -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]; - -#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) - -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 DEFINE_MUTEX(op_mutex); -static inline u16 ptr_nod(void *p) -{ - return (long)p & 0xFFFF; -} +#define OPENPROM_ROOT_INO 0 -static ssize_t nodenum_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) +enum op_inode_type { + op_inode_node, + op_inode_prop, +}; + +union op_inode_data { + struct device_node *node; + struct property *prop; +}; + +struct op_inode_info { + struct inode vfs_inode; + enum op_inode_type type; + union op_inode_data u; +}; + +static inline struct op_inode_info *OP_I(struct inode *inode) { - 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) - 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 container_of(inode, struct op_inode_info, vfs_inode); } -static ssize_t property_read(struct file *filp, char __user *buf, - size_t count, loff_t *ppos) +static int is_string(unsigned char *p, int len) { - 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; - } - 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--; - } + int i; - 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; - } + for (i = 0; i < len; i++) { + unsigned char val = p[i]; - 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 ((i && !val) || + (val >= ' ' && val <= '~')) + continue; - if (last == (u32 *)(op->value + op->len - 4) && last_cnt == 9) { - if (put_user('\n', (buf - 1))) - return -EFAULT; - } + return 0; + } - k += count; + return 1; +} - } else if (op->flag & OPP_HEXSTRING) { - char buffer[3]; +static int property_show(struct seq_file *f, void *v) +{ + struct property *prop = f->private; + void *pval; + int len; - 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--; - } + len = prop->length; + pval = prop->value; - 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 (is_string(pval, len)) { + while (len > 0) { + int n = strlen(pval); - 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--; - } + seq_printf(f, "%s", (char *) pval); - if (count) { - if (put_user('\n', &buf [k++ - *ppos])) - return -EFAULT; - } - } - count = k - *ppos; - *ppos = k; - return count; -} + /* Skip over the NULL byte too. */ + pval += n + 1; + len -= n + 1; -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); + if (len > 0) + seq_printf(f, " + "); } - 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; + } else { + 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]; - - 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 (!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; - - /* 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; + while (len >= 4) { + len -= 4; + + if (len) + seq_printf(f, "%08x.", + *(unsigned int *) pval); + else + seq_printf(f, "%08x", + *(unsigned int *) pval); + pval += 4; } - 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; + seq_printf(f, "\n"); + + return 0; } -int property_release (struct inode *inode, struct file *filp) +static void *property_start(struct seq_file *f, loff_t *pos) { - 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); - } + 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 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; } - unlock_kernel(); - kfree (filp->private_data); - return 0; + return ret; } static const struct file_operations openpromfs_prop_ops = { - .read = property_read, - .write = property_write, - .release = property_release, + .open = property_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, }; -static const struct file_operations openpromfs_nodenum_ops = { - .read = nodenum_read, -}; +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; - } - } - 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; - } - } + + 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; } - if (!ino) { - ino = lookup_children (NODE(dir->i_ino).child, name, len); - if (ino) - type = OPFSL_DIR; - else { - unlock_kernel(); - return ERR_PTR(-ENOENT); + + 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; } - 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 struct dentry *openpromfs_lookup(struct inode * dir, struct dentry *dentr 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]; - - lock_kernel(); + int i; + + 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) - goto out; - if (filldir(dirent, buffer, strlen(buffer), - filp->f_pos, NODE2INO(node), DT_DIR) < 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; + 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) + + /* Next, the properties as files. */ + prop = dp->properties; + while (i && prop) { + prop = prop->next; + i--; + } + while (prop) { + if (filldir(dirent, prop->name, strlen(prop->name), + filp->f_pos, prop->unique_id, DT_REG) < 0) goto out; + filp->f_pos++; - } else - 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++; - } - } + prop = prop->next; } } out: - unlock_kernel(); - return 0; -} - -static int openpromfs_create (struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *nd) -{ - 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); + mutex_unlock(&op_mutex); 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; - 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; -} +static kmem_cache_t *op_inode_cachep; -/* {{{ init section */ -static int __init check_space (u16 n) +static struct inode *openprom_alloc_inode(struct super_block *sb) { - unsigned long pages; + struct op_inode_info *oi; - if ((1 << alloced) * PAGE_SIZE < (n + 2) * sizeof(openpromfs_node)) { - pages = __get_free_pages (GFP_KERNEL, alloced + 1); - if (!pages) - return -1; + oi = kmem_cache_alloc(op_inode_cachep, SLAB_KERNEL); + if (!oi) + return NULL; - if (nodes) { - memcpy ((char *)pages, nodes, - (1 << alloced) * PAGE_SIZE); - free_pages ((unsigned long)nodes, alloced); - } - alloced++; - nodes = (openpromfs_node *)pages; - } - return 0; + return &oi->vfs_inode; } -static u16 __init get_nodes (u16 parent, u32 node) +static void openprom_destroy_inode(struct inode *inode) { - 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 int openprom_remount(struct super_block *sb, int *flags, char *data) } 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 struct super_operations openprom_sops = { 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 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent) 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 @@ static struct file_system_type openprom_fs_type = { .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) |