#include <linux/stat.h>
#include <linux/completion.h>
#include <linux/poll.h>
+#include <linux/printk.h>
#include <linux/file.h>
#include <linux/limits.h>
#include <linux/init.h>
static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
loff_t rv = -EINVAL;
loff_t (*llseek)(struct file *, loff_t, int);
static ssize_t proc_reg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
ssize_t rv = -EIO;
ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
static ssize_t proc_reg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
ssize_t rv = -EIO;
ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
static unsigned int proc_reg_poll(struct file *file, struct poll_table_struct *pts)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
unsigned int rv = DEFAULT_POLLMASK;
unsigned int (*poll)(struct file *, struct poll_table_struct *);
static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
long rv = -ENOTTY;
long (*ioctl)(struct file *, unsigned int, unsigned long);
#ifdef CONFIG_COMPAT
static long proc_reg_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
long rv = -ENOTTY;
long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ struct proc_dir_entry *pde = PDE(file_inode(file));
int rv = -EIO;
int (*mmap)(struct file *, struct vm_area_struct *);
struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
{
- struct inode * inode;
+ struct inode *inode = iget_locked(sb, de->low_ino);
- inode = iget_locked(sb, de->low_ino);
- if (!inode)
- return NULL;
- if (inode->i_state & I_NEW) {
+ if (inode && (inode->i_state & I_NEW)) {
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
PROC_I(inode)->pde = de;
} else
pde_put(de);
return inode;
-}
+}
int proc_fill_super(struct super_block *s)
{
+ struct inode *root_inode;
+
s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
s->s_time_gran = 1;
pde_get(&proc_root);
- s->s_root = d_make_root(proc_get_inode(s, &proc_root));
- if (s->s_root)
- return 0;
+ root_inode = proc_get_inode(s, &proc_root);
+ if (!root_inode) {
+ pr_err("proc_fill_super: get root inode failed\n");
+ return -ENOMEM;
+ }
- printk("proc_read_super: get root inode failed\n");
- pde_put(&proc_root);
- return -ENOMEM;
+ s->s_root = d_make_root(root_inode);
+ if (!s->s_root) {
+ pr_err("proc_fill_super: allocate dentry failed\n");
+ return -ENOMEM;
+ }
+
+ return 0;
}