/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include <linux/fs.h>
+#include <linux/ctype.h>
+#include <linux/dcache.h>
#include <linux/file.h>
-#include <linux/module.h>
+#include <linux/fs.h>
#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/list.h>
#include <linux/kernel.h>
-#include <linux/ctype.h>
-#include <linux/dcache.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
#include <linux/statfs.h>
+#include <linux/types.h>
#include <asm/uaccess.h>
-#include <asm/fcntl.h>
#include "os.h"
-static int init_inode(struct inode *inode, struct dentry *dentry);
+static int init_inode(struct inode *inode, struct dentry *dentry,
+ struct vfsmount *mnt);
struct hppfs_data {
struct list_head list;
struct hppfs_inode_info {
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
struct inode vfs_inode;
};
int i;
sb = dentry->d_sb;
- if((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
- return(0);
+ if ((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
+ return 0;
- for(i = 0; i < dentry->d_name.len; i++){
- if(!isdigit(dentry->d_name.name[i]))
- return(0);
+ for (i = 0; i < dentry->d_name.len; i++) {
+ if (!isdigit(dentry->d_name.name[i]))
+ return 0;
}
- return(1);
+ return 1;
}
static char *dentry_name(struct dentry *dentry, int extra)
len = 0;
parent = dentry;
- while(parent->d_parent != parent){
- if(is_pid(parent))
+ while (parent->d_parent != parent) {
+ if (is_pid(parent))
len += strlen("pid") + 1;
else len += parent->d_name.len + 1;
parent = parent->d_parent;
root = "proc";
len += strlen(root);
name = kmalloc(len + extra + 1, GFP_KERNEL);
- if(name == NULL) return(NULL);
+ if (name == NULL)
+ return NULL;
name[len] = '\0';
parent = dentry;
- while(parent->d_parent != parent){
- if(is_pid(parent)){
+ while (parent->d_parent != parent) {
+ if (is_pid(parent)) {
seg_name = "pid";
seg_len = strlen("pid");
}
parent = parent->d_parent;
}
strncpy(name, root, strlen(root));
- return(name);
+ return name;
}
-struct dentry_operations hppfs_dentry_ops = {
-};
-
static int file_removed(struct dentry *dentry, const char *file)
{
char *host_file;
int extra, fd;
extra = 0;
- if(file != NULL) extra += strlen(file) + 1;
+ if (file != NULL)
+ extra += strlen(file) + 1;
host_file = dentry_name(dentry, extra + strlen("/remove"));
- if(host_file == NULL){
- printk("file_removed : allocation failed\n");
- return(-ENOMEM);
+ if (host_file == NULL) {
+ printk(KERN_ERR "file_removed : allocation failed\n");
+ return -ENOMEM;
}
- if(file != NULL){
+ if (file != NULL) {
strcat(host_file, "/");
strcat(host_file, file);
}
fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
kfree(host_file);
- if(fd > 0){
+ if (fd > 0) {
os_close_file(fd);
- return(1);
+ return 1;
}
- return(0);
+ return 0;
}
static void hppfs_read_inode(struct inode *ino)
{
struct inode *proc_ino;
- if(HPPFS_I(ino)->proc_dentry == NULL)
+ if (HPPFS_I(ino)->proc_dentry == NULL)
return;
proc_ino = HPPFS_I(ino)->proc_dentry->d_inode;
int err, deleted;
deleted = file_removed(dentry, NULL);
- if(deleted < 0)
- return(ERR_PTR(deleted));
- else if(deleted)
- return(ERR_PTR(-ENOENT));
+ if (deleted < 0)
+ return ERR_PTR(deleted);
+ else if (deleted)
+ return ERR_PTR(-ENOENT);
err = -ENOMEM;
parent = HPPFS_I(ino)->proc_dentry;
mutex_lock(&parent->d_inode->i_mutex);
proc_dentry = d_lookup(parent, &dentry->d_name);
- if(proc_dentry == NULL){
+ if (proc_dentry == NULL) {
proc_dentry = d_alloc(parent, &dentry->d_name);
- if(proc_dentry == NULL){
+ if (proc_dentry == NULL) {
mutex_unlock(&parent->d_inode->i_mutex);
goto out;
}
new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
proc_dentry, NULL);
- if(new){
+ if (new) {
dput(proc_dentry);
proc_dentry = new;
}
}
mutex_unlock(&parent->d_inode->i_mutex);
- if(IS_ERR(proc_dentry))
- return(proc_dentry);
+ if (IS_ERR(proc_dentry))
+ return proc_dentry;
inode = hppfs_iget(ino->i_sb);
if (IS_ERR(inode)) {
goto out_dput;
}
- err = init_inode(inode, proc_dentry);
- if(err)
+ err = init_inode(inode, proc_dentry, HPPFS_I(ino)->proc_mnt);
+ if (err)
goto out_put;
hppfs_read_inode(inode);
d_add(dentry, inode);
- dentry->d_op = &hppfs_dentry_ops;
- return(NULL);
+ return NULL;
out_put:
iput(inode);
out_dput:
dput(proc_dentry);
out:
- return(ERR_PTR(err));
+ return ERR_PTR(err);
}
static const struct inode_operations hppfs_file_iops = {
read = file->f_path.dentry->d_inode->i_fop->read;
- if(!is_user)
+ if (!is_user)
set_fs(KERNEL_DS);
n = (*read)(file, buf, count, &file->f_pos);
- if(!is_user)
+ if (!is_user)
set_fs(USER_DS);
- if(ppos) *ppos = file->f_pos;
+ if (ppos)
+ *ppos = file->f_pos;
return n;
}
n = -ENOMEM;
new_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if(new_buf == NULL){
- printk("hppfs_read_file : kmalloc failed\n");
+ if (new_buf == NULL) {
+ printk(KERN_ERR "hppfs_read_file : kmalloc failed\n");
goto out;
}
n = 0;
- while(count > 0){
+ while (count > 0) {
cur = min_t(ssize_t, count, PAGE_SIZE);
err = os_read_file(fd, new_buf, cur);
- if(err < 0){
- printk("hppfs_read : read failed, errno = %d\n",
- err);
+ if (err < 0) {
+ printk(KERN_ERR "hppfs_read : read failed, "
+ "errno = %d\n", err);
n = err;
goto out_free;
- }
- else if(err == 0)
+ } else if (err == 0)
break;
- if(copy_to_user(buf, new_buf, err)){
+ if (copy_to_user(buf, new_buf, err)) {
n = -EFAULT;
goto out_free;
}
loff_t off;
int err;
- if(hppfs->contents != NULL){
- if(*ppos >= hppfs->len) return(0);
+ if (hppfs->contents != NULL) {
+ if (*ppos >= hppfs->len)
+ return 0;
data = hppfs->contents;
off = *ppos;
- while(off >= sizeof(data->contents)){
+ while (off >= sizeof(data->contents)) {
data = list_entry(data->list.next, struct hppfs_data,
list);
off -= sizeof(data->contents);
}
- if(off + count > hppfs->len)
+ if (off + count > hppfs->len)
count = hppfs->len - off;
copy_to_user(buf, &data->contents[off], count);
*ppos += count;
- }
- else if(hppfs->host_fd != -1){
+ } else if (hppfs->host_fd != -1) {
err = os_seek_file(hppfs->host_fd, *ppos);
- if(err){
- printk("hppfs_read : seek failed, errno = %d\n", err);
- return(err);
+ if (err) {
+ printk(KERN_ERR "hppfs_read : seek failed, "
+ "errno = %d\n", err);
+ return err;
}
count = hppfs_read_file(hppfs->host_fd, buf, count);
- if(count > 0)
+ if (count > 0)
*ppos += count;
}
else count = read_proc(hppfs->proc_file, buf, count, ppos, 1);
- return(count);
+ return count;
}
static ssize_t hppfs_write(struct file *file, const char __user *buf, size_t len,
err = (*write)(proc_file, buf, len, &proc_file->f_pos);
file->f_pos = proc_file->f_pos;
- return(err);
+ return err;
}
static int open_host_sock(char *host_file, int *filter_out)
strcpy(end, "/rw");
*filter_out = 1;
fd = os_connect_socket(host_file);
- if(fd > 0)
- return(fd);
+ if (fd > 0)
+ return fd;
strcpy(end, "/r");
*filter_out = 0;
fd = os_connect_socket(host_file);
- return(fd);
+ return fd;
}
static void free_contents(struct hppfs_data *head)
struct hppfs_data *data;
struct list_head *ele, *next;
- if(head == NULL) return;
+ if (head == NULL)
+ return;
- list_for_each_safe(ele, next, &head->list){
+ list_for_each_safe(ele, next, &head->list) {
data = list_entry(ele, struct hppfs_data, list);
kfree(data);
}
err = -ENOMEM;
data = kmalloc(sizeof(*data), GFP_KERNEL);
- if(data == NULL){
- printk("hppfs_get_data : head allocation failed\n");
+ if (data == NULL) {
+ printk(KERN_ERR "hppfs_get_data : head allocation failed\n");
goto failed;
}
head = data;
*size_out = 0;
- if(filter){
- while((n = read_proc(proc_file, data->contents,
+ if (filter) {
+ while ((n = read_proc(proc_file, data->contents,
sizeof(data->contents), NULL, 0)) > 0)
os_write_file(fd, data->contents, n);
err = os_shutdown_socket(fd, 0, 1);
- if(err){
- printk("hppfs_get_data : failed to shut down "
+ if (err) {
+ printk(KERN_ERR "hppfs_get_data : failed to shut down "
"socket\n");
goto failed_free;
}
}
- while(1){
+ while (1) {
n = os_read_file(fd, data->contents, sizeof(data->contents));
- if(n < 0){
+ if (n < 0) {
err = n;
- printk("hppfs_get_data : read failed, errno = %d\n",
- err);
+ printk(KERN_ERR "hppfs_get_data : read failed, "
+ "errno = %d\n", err);
goto failed_free;
- }
- else if(n == 0)
+ } else if (n == 0)
break;
*size_out += n;
- if(n < sizeof(data->contents))
+ if (n < sizeof(data->contents))
break;
new = kmalloc(sizeof(*data), GFP_KERNEL);
- if(new == 0){
- printk("hppfs_get_data : data allocation failed\n");
+ if (new == 0) {
+ printk(KERN_ERR "hppfs_get_data : data allocation "
+ "failed\n");
err = -ENOMEM;
goto failed_free;
}
list_add(&new->list, &data->list);
data = new;
}
- return(head);
+ return head;
failed_free:
free_contents(head);
failed:
- return(ERR_PTR(err));
+ return ERR_PTR(err);
}
static struct hppfs_private *hppfs_data(void)
struct hppfs_private *data;
data = kmalloc(sizeof(*data), GFP_KERNEL);
- if(data == NULL)
- return(data);
+ if (data == NULL)
+ return data;
*data = ((struct hppfs_private ) { .host_fd = -1,
.len = -1,
.contents = NULL } );
- return(data);
+ return data;
}
static int file_mode(int fmode)
{
- if(fmode == (FMODE_READ | FMODE_WRITE))
- return(O_RDWR);
- if(fmode == FMODE_READ)
- return(O_RDONLY);
- if(fmode == FMODE_WRITE)
- return(O_WRONLY);
- return(0);
+ if (fmode == (FMODE_READ | FMODE_WRITE))
+ return O_RDWR;
+ if (fmode == FMODE_READ)
+ return O_RDONLY;
+ if (fmode == FMODE_WRITE)
+ return O_WRONLY;
+ return 0;
}
static int hppfs_open(struct inode *inode, struct file *file)
{
struct hppfs_private *data;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
char *host_file;
int err, fd, type, filter;
err = -ENOMEM;
data = hppfs_data();
- if(data == NULL)
+ if (data == NULL)
goto out;
host_file = dentry_name(file->f_path.dentry, strlen("/rw"));
- if(host_file == NULL)
+ if (host_file == NULL)
goto out_free2;
proc_dentry = HPPFS_I(inode)->proc_dentry;
+ proc_mnt = HPPFS_I(inode)->proc_mnt;
/* XXX This isn't closed anywhere */
- data->proc_file = dentry_open(dget(proc_dentry), NULL,
+ data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
file_mode(file->f_mode));
err = PTR_ERR(data->proc_file);
- if(IS_ERR(data->proc_file))
+ if (IS_ERR(data->proc_file))
goto out_free1;
type = os_file_type(host_file);
- if(type == OS_TYPE_FILE){
+ if (type == OS_TYPE_FILE) {
fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
- if(fd >= 0)
+ if (fd >= 0)
data->host_fd = fd;
- else printk("hppfs_open : failed to open '%s', errno = %d\n",
- host_file, -fd);
+ else
+ printk(KERN_ERR "hppfs_open : failed to open '%s', "
+ "errno = %d\n", host_file, -fd);
data->contents = NULL;
- }
- else if(type == OS_TYPE_DIR){
+ } else if (type == OS_TYPE_DIR) {
fd = open_host_sock(host_file, &filter);
- if(fd > 0){
+ if (fd > 0) {
data->contents = hppfs_get_data(fd, filter,
data->proc_file,
file, &data->len);
- if(!IS_ERR(data->contents))
+ if (!IS_ERR(data->contents))
data->host_fd = fd;
- }
- else printk("hppfs_open : failed to open a socket in "
- "'%s', errno = %d\n", host_file, -fd);
+ } else
+ printk(KERN_ERR "hppfs_open : failed to open a socket "
+ "in '%s', errno = %d\n", host_file, -fd);
}
kfree(host_file);
file->private_data = data;
- return(0);
+ return 0;
out_free1:
kfree(host_file);
free_contents(data->contents);
kfree(data);
out:
- return(err);
+ return err;
}
static int hppfs_dir_open(struct inode *inode, struct file *file)
{
struct hppfs_private *data;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
int err;
err = -ENOMEM;
data = hppfs_data();
- if(data == NULL)
+ if (data == NULL)
goto out;
proc_dentry = HPPFS_I(inode)->proc_dentry;
- data->proc_file = dentry_open(dget(proc_dentry), NULL,
+ proc_mnt = HPPFS_I(inode)->proc_mnt;
+ data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
file_mode(file->f_mode));
err = PTR_ERR(data->proc_file);
- if(IS_ERR(data->proc_file))
+ if (IS_ERR(data->proc_file))
goto out_free;
file->private_data = data;
- return(0);
+ return 0;
out_free:
kfree(data);
out:
- return(err);
+ return err;
}
static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
loff_t ret;
llseek = proc_file->f_path.dentry->d_inode->i_fop->llseek;
- if(llseek != NULL){
+ if (llseek != NULL) {
ret = (*llseek)(proc_file, off, where);
- if(ret < 0)
- return(ret);
+ if (ret < 0)
+ return ret;
}
- return(default_llseek(file, off, where));
+ return default_llseek(file, off, where);
}
static const struct file_operations hppfs_file_fops = {
{
struct hppfs_dirent *dirent = d;
- if(file_removed(dirent->dentry, name))
- return(0);
+ if (file_removed(dirent->dentry, name))
+ return 0;
- return((*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
- inode, type));
+ return (*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
+ inode, type);
}
static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
struct hppfs_dirent dirent = ((struct hppfs_dirent)
{ .vfs_dirent = ent,
.filldir = filldir,
- .dentry = file->f_path.dentry } );
+ .dentry = file->f_path.dentry
+ });
int err;
readdir = proc_file->f_path.dentry->d_inode->i_fop->readdir;
err = (*readdir)(proc_file, &dirent, hppfs_filldir);
file->f_pos = proc_file->f_pos;
- return(err);
+ return err;
}
static int hppfs_fsync(struct file *file, struct dentry *dentry, int datasync)
{
- return(0);
+ return 0;
}
static const struct file_operations hppfs_dir_fops = {
sf->f_files = 0;
sf->f_ffree = 0;
sf->f_type = HPPFS_SUPER_MAGIC;
- return(0);
+ return 0;
}
static struct inode *hppfs_alloc_inode(struct super_block *sb)
struct hppfs_inode_info *hi;
hi = kmalloc(sizeof(*hi), GFP_KERNEL);
- if(hi == NULL)
- return(NULL);
+ if (!hi)
+ return NULL;
- *hi = ((struct hppfs_inode_info) { .proc_dentry = NULL });
+ hi->proc_dentry = NULL;
+ hi->proc_mnt = NULL;
inode_init_once(&hi->vfs_inode);
- return(&hi->vfs_inode);
+ return &hi->vfs_inode;
}
void hppfs_delete_inode(struct inode *ino)
kfree(HPPFS_I(inode));
}
+static void hppfs_put_super(struct super_block *sb)
+{
+ mntput(HPPFS_I(sb->s_root->d_inode)->proc_mnt);
+}
+
static const struct super_operations hppfs_sbops = {
.alloc_inode = hppfs_alloc_inode,
.destroy_inode = hppfs_destroy_inode,
.delete_inode = hppfs_delete_inode,
.statfs = hppfs_statfs,
+ .put_super = hppfs_put_super,
};
-static int hppfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
+static int hppfs_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen)
{
struct file *proc_file;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
int ret;
proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
- proc_file = dentry_open(dget(proc_dentry), NULL, O_RDONLY);
+ proc_mnt = HPPFS_I(dentry->d_inode)->proc_mnt;
+
+ proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt), O_RDONLY);
if (IS_ERR(proc_file))
return PTR_ERR(proc_file);
{
struct file *proc_file;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
void *ret;
proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
- proc_file = dentry_open(dget(proc_dentry), NULL, O_RDONLY);
+ proc_mnt = HPPFS_I(dentry->d_inode)->proc_mnt;
+
+ proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt), O_RDONLY);
if (IS_ERR(proc_file))
return proc_file;
.follow_link = hppfs_follow_link,
};
-static int init_inode(struct inode *inode, struct dentry *dentry)
+static int init_inode(struct inode *inode, struct dentry *dentry,
+ struct vfsmount *mnt)
{
- if(S_ISDIR(dentry->d_inode->i_mode)){
+ if (S_ISDIR(dentry->d_inode->i_mode)) {
inode->i_op = &hppfs_dir_iops;
inode->i_fop = &hppfs_dir_fops;
- }
- else if(S_ISLNK(dentry->d_inode->i_mode)){
+ } else if (S_ISLNK(dentry->d_inode->i_mode)) {
inode->i_op = &hppfs_link_iops;
inode->i_fop = &hppfs_file_fops;
- }
- else {
+ } else {
inode->i_op = &hppfs_file_iops;
inode->i_fop = &hppfs_file_fops;
}
HPPFS_I(inode)->proc_dentry = dentry;
+ HPPFS_I(inode)->proc_mnt = mnt;
- return(0);
+ return 0;
}
static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
{
struct inode *root_inode;
struct file_system_type *procfs;
- struct super_block *proc_sb;
+ struct vfsmount *proc_mnt;
int err;
err = -ENOENT;
procfs = get_fs_type("proc");
- if(procfs == NULL)
+ if (!procfs)
goto out;
- if(list_empty(&procfs->fs_supers))
+ proc_mnt = vfs_kern_mount(procfs, 0, procfs->name, NULL);
+ put_filesystem(procfs);
+ if (IS_ERR(proc_mnt))
goto out;
- proc_sb = list_entry(procfs->fs_supers.next, struct super_block,
- s_instances);
-
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HPPFS_SUPER_MAGIC;
goto out;
}
- err = init_inode(root_inode, proc_sb->s_root);
- if(err)
- goto out_put;
+ err = init_inode(root_inode, proc_mnt->mnt_sb->s_root, proc_mnt);
+ if (err)
+ goto out_iput;
err = -ENOMEM;
sb->s_root = d_alloc_root(root_inode);
- if(sb->s_root == NULL)
- goto out_put;
+ if (!sb->s_root)
+ goto out_iput;
hppfs_read_inode(root_inode);
- return(0);
+ return 0;
- out_put:
+ out_iput:
iput(root_inode);
+ out_mntput:
+ mntput(proc_mnt);
out:
return(err);
}
static int __init init_hppfs(void)
{
- return(register_filesystem(&hppfs_type));
+ return register_filesystem(&hppfs_type);
}
static void __exit exit_hppfs(void)
module_init(init_hppfs)
module_exit(exit_hppfs)
MODULE_LICENSE("GPL");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
git.openpandora.org / pandora-kernel.git / commitdiff