/*
* Create the EMD file for a directory if it doesn't
* already exist. Returns 0 or an error code.
*
* Note: the caller must hold a lock on the parent directory.
*/
int umsdos_make_emd(struct dentry *parent)
{
struct dentry *demd = umsdos_get_emd_dentry(parent);
int err = PTR_ERR(demd);
if (IS_ERR(demd)) {
printk("umsdos_make_emd: can't get dentry in %s, err=%d\n",
parent->d_name.name, err);
goto out;
}
/* already created? */
err = 0;
if (demd->d_inode)
goto out_set;
Printk(("umsdos_make_emd: creating EMD %s/%s\n",
parent->d_name.name, demd->d_name.name));
err = msdos_create(parent->d_inode, demd, S_IFREG | 0777);
if (err) {
printk (KERN_WARNING
"umsdos_make_emd: create %s/%s failed, err=%d\n",
parent->d_name.name, demd->d_name.name, err);
goto out_dput;
}
out_set:
parent->d_inode->u.umsdos_i.i_emd_dir = demd->d_inode->i_ino;
out_dput:
dput(demd);
out:
return err;
}
/*
Locate the EMD file in a directory and optionally, creates it.
Return NULL if error. If ok, dir->u.umsdos_i.emd_inode
*/
struct inode *umsdos_emd_dir_lookup(struct inode *dir, int creat)
{
struct inode *ret = NULL;
if (dir->u.umsdos_i.i_emd_dir != 0){
ret = iget (dir->i_sb,dir->u.umsdos_i.i_emd_dir);
PRINTK (("deja trouve %d %x [%d] "
,dir->u.umsdos_i.i_emd_dir,ret,ret->i_count));
}else{
umsdos_real_lookup (dir,UMSDOS_EMD_FILE,UMSDOS_EMD_NAMELEN,&ret);
PRINTK (("emd_dir_lookup "));
if (ret != NULL){
PRINTK (("Find --linux "));
dir->u.umsdos_i.i_emd_dir = ret->i_ino;
}else if (creat){
int code;
PRINTK (("avant create "));
dir->i_count++;
code = msdos_create (dir,UMSDOS_EMD_FILE,UMSDOS_EMD_NAMELEN
,S_IFREG|0777,&ret);
PRINTK (("Creat EMD code %d ret %x ",code,ret));
if (ret != NULL){
dir->u.umsdos_i.i_emd_dir = ret->i_ino;
}else{
printk ("UMSDOS: Can't create EMD file\n");
}
}
}
if (ret != NULL){
/* Disable UMSDOS_notify_change() for EMD file */
ret->u.umsdos_i.i_emd_owner = 0xffffffff;
}
return ret;
}
