/*
* Extended attribute REMOVE operations
*/
static long
removexattr(struct dentry *d, char __user *name)
{
int error;
char kname[XATTR_NAME_MAX + 1];
error = strncpy_from_user(kname, name, sizeof(kname));
if (error == 0 || error == sizeof(kname))
error = -ERANGE;
if (error < 0)
return error;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->removexattr) {
error = security_inode_removexattr(d, kname);
if (error)
goto out;
down(&d->d_inode->i_sem);
audit_notify_watch(d->d_inode, MAY_WRITE);
error = d->d_inode->i_op->removexattr(d, kname);
up(&d->d_inode->i_sem);
}
out:
return error;
}
int
vfs_removexattr(struct dentry *dentry, const char *name)
{
struct inode *inode = dentry->d_inode;
int error;
if (!inode->i_op->removexattr)
return -EOPNOTSUPP;
error = xattr_permission(inode, name, MAY_WRITE);
if (error)
return error;
error = security_inode_removexattr(dentry, name);
if (error)
return error;
mutex_lock(&inode->i_mutex);
error = inode->i_op->removexattr(dentry, name);
mutex_unlock(&inode->i_mutex);
if (!error)
fsnotify_xattr(dentry);
return error;
}
