The decision payload the supervisor process sends to the kernel.
Fields
id: u64,
The filter cookie.
val: i64,
The return value for a spoofed syscall.
error: i32,
Set to zero for a spoofed success or a negative error number for a failure.
flags: u32,
Bitmask containing the decision. Either USER_NOTIF_FLAG_CONTINUE to allow the syscall or zero to spoof the return values.