static int coda_pioctl(struct inode * inode, struct file * filp,
unsigned int cmd, unsigned long user_data)
{
struct nameidata nd;
int error;
struct PioctlData data;
struct inode *target_inode = NULL;
struct coda_inode_info *cnp;
/* get the Pioctl data arguments from user space */
if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
return -EINVAL;
}
/*
* Look up the pathname. Note that the pathname is in
* user memory, and namei takes care of this
*/
if ( data.follow ) {
error = user_path_walk(data.path, &nd);
} else {
error = user_path_walk_link(data.path, &nd);
}
if ( error ) {
return error;
} else {
target_inode = nd.dentry->d_inode;
}
/* return if it is not a Coda inode */
if ( target_inode->i_sb != inode->i_sb ) {
path_release(&nd);
return -EINVAL;
}
/* now proceed to make the upcall */
cnp = ITOC(target_inode);
error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
path_release(&nd);
return error;
}
static long coda_pioctl(struct file *filp, unsigned int cmd,
unsigned long user_data)
{
struct path path;
int error;
struct PioctlData data;
struct inode *inode = filp->f_dentry->d_inode;
struct inode *target_inode = NULL;
struct coda_inode_info *cnp;
/* get the Pioctl data arguments from user space */
if (copy_from_user(&data, (void __user *)user_data, sizeof(data)))
return -EINVAL;
/*
* Look up the pathname. Note that the pathname is in
* user memory, and namei takes care of this
*/
if (data.follow)
error = user_path(data.path, &path);
else
error = user_lpath(data.path, &path);
if (error)
return error;
target_inode = path.dentry->d_inode;
/* return if it is not a Coda inode */
if (target_inode->i_sb != inode->i_sb) {
error = -EINVAL;
goto out;
}
/* now proceed to make the upcall */
cnp = ITOC(target_inode);
error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
out:
path_put(&path);
return error;
}