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Fix concurrent access to signer queue (#8854) 

* Fix concurrent access to signer queue

* Put request back to the queue if confirmation failed

* typo: fix docs and rename functions to be more specific

`request_notify` does not need to be public, and it's renamed to `notify_result`.
`notify` is renamed to `notify_message`.

* Change trace info "Transaction" -> "Request"
This commit is contained in:
Wei Tang 2018-06-12 21:21:30 +08:00 committed by Afri Schoedon
parent 0bb78814a6
commit b34d46cbc8
4 changed files with 69 additions and 57 deletions
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2
rpc/src/v1/helpers/mod.rs
View File

@ -44,7 +44,7 @@ pub use self::requests::{
TransactionRequest, FilledTransactionRequest, ConfirmationRequest, ConfirmationPayload, CallRequest,
};
pub use self::signing_queue::{
ConfirmationsQueue, ConfirmationReceiver, ConfirmationResult,
ConfirmationsQueue, ConfirmationReceiver, ConfirmationResult, ConfirmationSender,
SigningQueue, QueueEvent, DefaultAccount,
QUEUE_LIMIT as SIGNING_QUEUE_LIMIT,
};

88
rpc/src/v1/helpers/signing_queue.rs
View File

@ -75,16 +75,17 @@ pub trait SigningQueue: Send + Sync {
/// `ConfirmationReceiver` is a `Future` awaiting for resolution of the given request.
fn add_request(&self, request: ConfirmationPayload, origin: Origin) -> Result<(U256, ConfirmationReceiver), QueueAddError>;
/// Removes a request from the queue.
/// Notifies possible token holders that request was rejected.
fn request_rejected(&self, id: U256) -> Option<ConfirmationRequest>;
fn request_rejected(&self, sender: ConfirmationSender) -> Option<ConfirmationRequest>;
/// Removes a request from the queue.
/// Notifies possible token holders that request was confirmed and given hash was assigned.
fn request_confirmed(&self, id: U256, result: ConfirmationResult) -> Option<ConfirmationRequest>;
fn request_confirmed(&self, sender: ConfirmationSender, result: ConfirmationResult) -> Option<ConfirmationRequest>;
/// Returns a request if it is contained in the queue.
fn peek(&self, id: &U256) -> Option<ConfirmationRequest>;
/// Put a request taken from `SigningQueue::take` back to the queue.
fn request_untouched(&self, sender: ConfirmationSender);
/// Returns and removes a request if it is contained in the queue.
fn take(&self, id: &U256) -> Option<ConfirmationSender>;
/// Return copy of all the requests in the queue.
fn requests(&self) -> Vec<ConfirmationRequest>;
@ -96,9 +97,12 @@ pub trait SigningQueue: Send + Sync {
fn is_empty(&self) -> bool;
}
struct ConfirmationSender {
/// Confirmation request information with result notifier.
pub struct ConfirmationSender {
/// Confirmation request information.
pub request: ConfirmationRequest,
sender: oneshot::Sender<ConfirmationResult>,
request: ConfirmationRequest,
}
/// Receiving end of the Confirmation channel; can be used as a `Future` to await for `ConfirmationRequest`
@ -122,36 +126,29 @@ impl ConfirmationsQueue {
/// Notifies consumer that the communcation is over.
/// No more events will be sent after this function is invoked.
pub fn finish(&self) {
self.notify(QueueEvent::Finish);
self.notify_message(QueueEvent::Finish);
self.on_event.write().clear();
}
/// Notifies receiver about the event happening in this queue.
fn notify(&self, message: QueueEvent) {
for listener in &*self.on_event.read() {
listener(message.clone())
}
/// Notifies `ConfirmationReceiver` holder about the result given a request.
fn notify_result(&self, sender: ConfirmationSender, result: Option<ConfirmationResult>) -> Option<ConfirmationRequest> {
// notify receiver about the event
self.notify_message(result.clone().map_or_else(
|| QueueEvent::RequestRejected(sender.request.id),
|_| QueueEvent::RequestConfirmed(sender.request.id)
));
// notify confirmation receiver about resolution
let result = result.ok_or(errors::request_rejected());
sender.sender.send(result);
Some(sender.request)
}
/// Removes requests from this queue and notifies `ConfirmationReceiver` holder about the result.
/// Notifies also a receiver about that event.
fn remove(&self, id: U256, result: Option<ConfirmationResult>) -> Option<ConfirmationRequest> {
let sender = self.queue.write().remove(&id);
if let Some(sender) = sender {
// notify receiver about the event
self.notify(result.clone().map_or_else(
|| QueueEvent::RequestRejected(id),
|_| QueueEvent::RequestConfirmed(id)
));
// notify confirmation receiver about resolution
let result = result.ok_or(errors::request_rejected());
sender.sender.send(result);
Some(sender.request)
} else {
None
/// Notifies receiver about the event happening in this queue.
fn notify_message(&self, message: QueueEvent) {
for listener in &*self.on_event.read() {
listener(message.clone())
}
}
}
@ -193,22 +190,26 @@ impl SigningQueue for ConfirmationsQueue {
(id, receiver)
};
// Notify listeners
self.notify(QueueEvent::NewRequest(id));
self.notify_message(QueueEvent::NewRequest(id));
Ok(res)
}
fn peek(&self, id: &U256) -> Option<ConfirmationRequest> {
self.queue.read().get(id).map(|sender| sender.request.clone())
fn take(&self, id: &U256) -> Option<ConfirmationSender> {
self.queue.write().remove(id)
}
fn request_rejected(&self, id: U256) -> Option<ConfirmationRequest> {
debug!(target: "own_tx", "Signer: Request rejected ({:?}).", id);
self.remove(id, None)
fn request_rejected(&self, sender: ConfirmationSender) -> Option<ConfirmationRequest> {
debug!(target: "own_tx", "Signer: Request rejected ({:?}).", sender.request.id);
self.notify_result(sender, None)
}
fn request_confirmed(&self, id: U256, result: ConfirmationResult) -> Option<ConfirmationRequest> {
debug!(target: "own_tx", "Signer: Transaction confirmed ({:?}).", id);
self.remove(id, Some(result))
fn request_confirmed(&self, sender: ConfirmationSender, result: ConfirmationResult) -> Option<ConfirmationRequest> {
debug!(target: "own_tx", "Signer: Request confirmed ({:?}).", sender.request.id);
self.notify_result(sender, Some(result))
}
fn request_untouched(&self, sender: ConfirmationSender) {
self.queue.write().insert(sender.request.id, sender);
}
fn requests(&self) -> Vec<ConfirmationRequest> {
@ -260,7 +261,8 @@ mod test {
// when
let (id, future) = queue.add_request(request, Default::default()).unwrap();
queue.request_confirmed(id, Ok(ConfirmationResponse::SendTransaction(1.into())));
let sender = queue.take(&id).unwrap();
queue.request_confirmed(sender, Ok(ConfirmationResponse::SendTransaction(1.into())));
// then
let confirmation = future.wait().unwrap();

21
rpc/src/v1/impls/signer.rs
View File

@ -86,11 +86,11 @@ impl<D: Dispatcher + 'static> SignerClient<D> {
let dispatcher = self.dispatcher.clone();
let signer = self.signer.clone();
Box::new(signer.peek(&id).map(|confirmation| {
let mut payload = confirmation.payload.clone();
Box::new(signer.take(&id).map(|sender| {
let mut payload = sender.request.payload.clone();
// Modify payload
if let ConfirmationPayload::SendTransaction(ref mut request) = payload {
if let Some(sender) = modification.sender.clone() {
if let Some(sender) = modification.sender {
request.from = sender.into();
// Altering sender should always reset the nonce.
request.nonce = None;
@ -109,7 +109,9 @@ impl<D: Dispatcher + 'static> SignerClient<D> {
Either::A(fut.into_future().then(move |result| {
// Execute
if let Ok(ref response) = result {
signer.request_confirmed(id, Ok((*response).clone()));
signer.request_confirmed(sender, Ok((*response).clone()));
} else {
signer.request_untouched(sender);
}
result
@ -188,8 +190,9 @@ impl<D: Dispatcher + 'static> Signer for SignerClient<D> {
fn confirm_request_raw(&self, id: U256, bytes: Bytes) -> Result<ConfirmationResponse> {
let id = id.into();
self.signer.peek(&id).map(|confirmation| {
let result = match confirmation.payload {
self.signer.take(&id).map(|sender| {
let payload = sender.request.payload.clone();
let result = match payload {
ConfirmationPayload::SendTransaction(request) => {
Self::verify_transaction(bytes, request, |pending_transaction| {
self.dispatcher.dispatch_transaction(pending_transaction)
@ -218,14 +221,16 @@ impl<D: Dispatcher + 'static> Signer for SignerClient<D> {
},
};
if let Ok(ref response) = result {
self.signer.request_confirmed(id, Ok(response.clone()));
self.signer.request_confirmed(sender, Ok(response.clone()));
} else {
self.signer.request_untouched(sender);
}
result
}).unwrap_or_else(|| Err(errors::invalid_params("Unknown RequestID", id)))
}
fn reject_request(&self, id: U256) -> Result<bool> {
let res = self.signer.request_rejected(id.into());
let res = self.signer.take(&id.into()).map(|sender| self.signer.request_rejected(sender));
Ok(res.is_some())
}

15
rpc/src/v1/tests/mocked/signing.rs
View File

@ -109,7 +109,8 @@ fn should_add_sign_to_queue() {
::std::thread::spawn(move || loop {
if signer.requests().len() == 1 {
// respond
signer.request_confirmed(1.into(), Ok(ConfirmationResponse::Signature(0.into())));
let sender = signer.take(&1.into()).unwrap();
signer.request_confirmed(sender, Ok(ConfirmationResponse::Signature(0.into())));
break
}
::std::thread::sleep(Duration::from_millis(100))
@ -187,7 +188,8 @@ fn should_check_status_of_request_when_its_resolved() {
"id": 1
}"#;
tester.io.handle_request_sync(&request).expect("Sent");
tester.signer.request_confirmed(1.into(), Ok(ConfirmationResponse::Signature(1.into())));
let sender = tester.signer.take(&1.into()).unwrap();
tester.signer.request_confirmed(sender, Ok(ConfirmationResponse::Signature(1.into())));
// This is not ideal, but we need to give futures some time to be executed, and they need to run in a separate thread
thread::sleep(Duration::from_millis(20));
@ -258,7 +260,8 @@ fn should_add_transaction_to_queue() {
::std::thread::spawn(move || loop {
if signer.requests().len() == 1 {
// respond
signer.request_confirmed(1.into(), Ok(ConfirmationResponse::SendTransaction(0.into())));
let sender = signer.take(&1.into()).unwrap();
signer.request_confirmed(sender, Ok(ConfirmationResponse::SendTransaction(0.into())));
break
}
::std::thread::sleep(Duration::from_millis(100))
@ -334,7 +337,8 @@ fn should_add_sign_transaction_to_the_queue() {
::std::thread::spawn(move || loop {
if signer.requests().len() == 1 {
// respond
signer.request_confirmed(1.into(), Ok(ConfirmationResponse::SignTransaction(
let sender = signer.take(&1.into()).unwrap();
signer.request_confirmed(sender, Ok(ConfirmationResponse::SignTransaction(
RichRawTransaction::from_signed(t.into(), 0x0, u64::max_value())
)));
break
@ -440,7 +444,8 @@ fn should_add_decryption_to_the_queue() {
::std::thread::spawn(move || loop {
if signer.requests().len() == 1 {
// respond
signer.request_confirmed(1.into(), Ok(ConfirmationResponse::Decrypt(vec![0x1, 0x2].into())));
let sender = signer.take(&1.into()).unwrap();
signer.request_confirmed(sender, Ok(ConfirmationResponse::Decrypt(vec![0x1, 0x2].into())));
break
}
::std::thread::sleep(Duration::from_millis(10))