int unionfs_rmdir(struct inode *dir, struct dentry *dentry)
{
int err = 0;
struct unionfs_dir_state *namelist = NULL;
print_entry_location();
lock_dentry(dentry);
fist_print_dentry("IN unionfs_rmdir: ", dentry);
/* check if this unionfs directory is empty or not */
err = check_empty(dentry, &namelist);
if (err) {
goto out;
}
if (IS_SET(dir->i_sb, DELETE_WHITEOUT)) {
/* Delete the first directory. */
err = unionfs_rmdir_first(dir, dentry, namelist);
/* create whiteout */
if (!err) {
err = create_whiteout(dentry, dbstart(dentry));
} else {
int new_err;
if (dbstart(dentry) == 0)
goto out;
/* exit if the error returned was NOT -EROFS */
if (!IS_COPYUP_ERR(err))
goto out;
new_err = create_whiteout(dentry, dbstart(dentry) - 1);
if (new_err != -EEXIST)
err = new_err;
}
} else {
/* delete all. */
err = unionfs_rmdir_all(dir, dentry, namelist);
}
out:
/* call d_drop so the system "forgets" about us */
if (!err)
d_drop(dentry);
if (namelist)
free_rdstate(namelist);
unlock_dentry(dentry);
print_exit_status(err);
return err;
}
int unionfs_rmdir(struct inode *dir, struct dentry *dentry)
{
int err = 0;
struct unionfs_dir_state *namelist = NULL;
print_entry_location();
lock_dentry(dentry);
fist_print_dentry("IN unionfs_rmdir: ", dentry);
/* check if this unionfs directory is empty or not */
err = check_empty(dentry, &namelist);
if (err) {
#if 0
/* vfs_rmdir(our caller) unhashed the dentry. This will recover
* the Unionfs inode number for the directory itself, but the
* children are already lost. It seems that tmpfs manages its
* way around this by upping the refcount on everything.
*
* Even if we do this, we still lose the inode numbers of the
* children. The best way to fix this is to fix the VFS (or
* use persistent inode maps). */
if (d_unhashed(dentry))
d_rehash(dentry);
#endif
goto out;
}
#ifdef UNIONFS_DELETE_ALL
if (IS_SET(dir->i_sb, DELETE_ALL)) {
/* delete all. */
err = unionfs_rmdir_all(dir, dentry, namelist);
} else { /* Delete the first directory. */
#endif
err = unionfs_rmdir_first(dir, dentry, namelist);
/* create whiteout */
if (!err) {
err = create_whiteout(dentry, dbstart(dentry));
} else {
int new_err;
if (dbstart(dentry) == 0)
goto out;
/* exit if the error returned was NOT -EROFS */
if (!IS_COPYUP_ERR(err))
goto out;
new_err = create_whiteout(dentry, dbstart(dentry) - 1);
if (new_err != -EEXIST)
err = new_err;
}
#ifdef UNIONFS_DELETE_ALL
}
#endif
out:
/* call d_drop so the system "forgets" about us */
if (!err)
d_drop(dentry);
if (namelist)
free_rdstate(namelist);
unlock_dentry(dentry);
print_exit_status(err);
return err;
}