+mod util;
+
extern crate lightning;
extern crate bitcoin;
extern crate libc;
use bitcoin::hashes::hex::ToHex;
+use crate::util::DiskWriteable;
use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateErr};
use lightning::chain::channelmonitor;
use lightning::chain::keysinterface::ChannelKeys;
use lightning::util::ser::Writeable;
use std::fs;
use std::io::Error;
-use std::path::{Path, PathBuf};
#[cfg(test)]
use {
std::io::Cursor
};
-#[cfg(not(target_os = "windows"))]
-use std::os::unix::io::AsRawFd;
-
/// FilesystemPersister persists channel data on disk, where each channel's
/// data is stored in a file named after its funding outpoint.
///
path_to_channel_data: String,
}
-trait DiskWriteable {
- fn write(&self, writer: &mut fs::File) -> Result<(), Error>;
-}
-
impl<ChanSigner: ChannelKeys> DiskWriteable for ChannelMonitor<ChanSigner> {
- fn write(&self, writer: &mut fs::File) -> Result<(), Error> {
- Writeable::write(self, writer)
+ fn write_to_file(&self, writer: &mut fs::File) -> Result<(), Error> {
+ self.write(writer)
}
}
}
}
- fn get_full_filepath(&self, funding_txo: OutPoint) -> String {
- let mut path = PathBuf::from(&self.path_to_channel_data);
- path.push(format!("{}_{}", funding_txo.txid.to_hex(), funding_txo.index));
- path.to_str().unwrap().to_string()
- }
-
- // Utility to write a file to disk.
- fn write_channel_data(&self, funding_txo: OutPoint, monitor: &dyn DiskWriteable) -> std::io::Result<()> {
- fs::create_dir_all(&self.path_to_channel_data)?;
- // Do a crazy dance with lots of fsync()s to be overly cautious here...
- // We never want to end up in a state where we've lost the old data, or end up using the
- // old data on power loss after we've returned.
- // The way to atomically write a file on Unix platforms is:
- // open(tmpname), write(tmpfile), fsync(tmpfile), close(tmpfile), rename(), fsync(dir)
- let filename = self.get_full_filepath(funding_txo);
- let tmp_filename = format!("{}.tmp", filename.clone());
-
- {
- // Note that going by rust-lang/rust@d602a6b, on MacOS it is only safe to use
- // rust stdlib 1.36 or higher.
- let mut f = fs::File::create(&tmp_filename)?;
- monitor.write(&mut f)?;
- f.sync_all()?;
- }
- fs::rename(&tmp_filename, &filename)?;
- // Fsync the parent directory on Unix.
- #[cfg(not(target_os = "windows"))]
- {
- let path = Path::new(&filename).parent().unwrap();
- let dir_file = fs::OpenOptions::new().read(true).open(path)?;
- unsafe { libc::fsync(dir_file.as_raw_fd()); }
- }
- Ok(())
- }
-
#[cfg(test)]
fn load_channel_data<Keys: KeysInterface>(&self, keys: &Keys) ->
Result<HashMap<OutPoint, ChannelMonitor<Keys::ChanKeySigner>>, ChannelMonitorUpdateErr> {
impl<ChanSigner: ChannelKeys + Send + Sync> channelmonitor::Persist<ChanSigner> for FilesystemPersister {
fn persist_new_channel(&self, funding_txo: OutPoint, monitor: &ChannelMonitor<ChanSigner>) -> Result<(), ChannelMonitorUpdateErr> {
- self.write_channel_data(funding_txo, monitor)
+ let filename = format!("{}_{}", funding_txo.txid.to_hex(), funding_txo.index);
+ util::write_to_file(self.path_to_channel_data.clone(), filename, monitor)
.map_err(|_| ChannelMonitorUpdateErr::PermanentFailure)
}
fn update_persisted_channel(&self, funding_txo: OutPoint, _update: &ChannelMonitorUpdate, monitor: &ChannelMonitor<ChanSigner>) -> Result<(), ChannelMonitorUpdateErr> {
- self.write_channel_data(funding_txo, monitor)
+ let filename = format!("{}_{}", funding_txo.txid.to_hex(), funding_txo.index);
+ util::write_to_file(self.path_to_channel_data.clone(), filename, monitor)
.map_err(|_| ChannelMonitorUpdateErr::PermanentFailure)
}
}
-#[cfg(test)]
-impl Drop for FilesystemPersister {
- fn drop(&mut self) {
- // We test for invalid directory names, so it's OK if directory removal
- // fails.
- match fs::remove_dir_all(&self.path_to_channel_data) {
- Err(e) => println!("Failed to remove test persister directory: {}", e),
- _ => {}
- }
- }
-}
-
#[cfg(test)]
mod tests {
extern crate lightning;
use bitcoin::blockdata::block::{Block, BlockHeader};
use bitcoin::hashes::hex::FromHex;
use bitcoin::Txid;
- use DiskWriteable;
- use Error;
use lightning::chain::channelmonitor::{Persist, ChannelMonitorUpdateErr};
use lightning::chain::transaction::OutPoint;
use lightning::{check_closed_broadcast, check_added_monitors};
use lightning::ln::functional_test_utils::*;
use lightning::ln::msgs::ErrorAction;
use lightning::util::events::{MessageSendEventsProvider, MessageSendEvent};
- use lightning::util::ser::Writer;
use lightning::util::test_utils;
use std::fs;
- use std::io;
#[cfg(target_os = "windows")]
use {
lightning::get_event_msg,
lightning::ln::msgs::ChannelMessageHandler,
};
- struct TestWriteable{}
- impl DiskWriteable for TestWriteable {
- fn write(&self, writer: &mut fs::File) -> Result<(), Error> {
- writer.write_all(&[42; 1])
+ impl Drop for FilesystemPersister {
+ fn drop(&mut self) {
+ // We test for invalid directory names, so it's OK if directory removal
+ // fails.
+ match fs::remove_dir_all(&self.path_to_channel_data) {
+ Err(e) => println!("Failed to remove test persister directory: {}", e),
+ _ => {}
+ }
}
}
check_persisted_data!(11);
}
- // Test that if the persister's path to channel data is read-only, writing
- // data to it fails. Windows ignores the read-only flag for folders, so this
- // test is Unix-only.
- #[cfg(not(target_os = "windows"))]
- #[test]
- fn test_readonly_dir() {
- let persister = FilesystemPersister::new("test_readonly_dir_persister".to_string());
- let test_writeable = TestWriteable{};
- let test_txo = OutPoint {
- txid: Txid::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(),
- index: 0
- };
- // Create the persister's directory and set it to read-only.
- let path = &persister.path_to_channel_data;
- fs::create_dir_all(path).unwrap();
- let mut perms = fs::metadata(path).unwrap().permissions();
- perms.set_readonly(true);
- fs::set_permissions(path, perms).unwrap();
- match persister.write_channel_data(test_txo, &test_writeable) {
- Err(e) => assert_eq!(e.kind(), io::ErrorKind::PermissionDenied),
- _ => panic!("Unexpected error message")
- }
- }
-
- // Test failure to rename in the process of atomically creating a channel
- // monitor's file. We induce this failure by making the `tmp` file a
- // directory.
- // Explanation: given "from" = the file being renamed, "to" = the
- // renamee that already exists: Windows should fail because it'll fail
- // whenever "to" is a directory, and Unix should fail because if "from" is a
- // file, then "to" is also required to be a file.
- #[test]
- fn test_rename_failure() {
- let persister = FilesystemPersister::new("test_rename_failure".to_string());
- let test_writeable = TestWriteable{};
- let txid_hex = "8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be";
- let outp_idx = 0;
- let test_txo = OutPoint {
- txid: Txid::from_hex(txid_hex).unwrap(),
- index: outp_idx,
- };
- // Create the channel data file and make it a directory.
- let path = &persister.path_to_channel_data;
- fs::create_dir_all(format!("{}/{}_{}", path, txid_hex, outp_idx)).unwrap();
- match persister.write_channel_data(test_txo, &test_writeable) {
- Err(e) => {
- #[cfg(not(target_os = "windows"))]
- assert_eq!(e.kind(), io::ErrorKind::Other);
- #[cfg(target_os = "windows")]
- assert_eq!(e.kind(), io::ErrorKind::PermissionDenied);
- }
- _ => panic!("Unexpected error message")
- }
- }
-
- // Test failure to create the temporary file in the persistence process.
- // We induce this failure by having the temp file already exist and be a
- // directory.
- #[test]
- fn test_tmp_file_creation_failure() {
- let persister = FilesystemPersister::new("test_tmp_file_creation_failure".to_string());
- let test_writeable = TestWriteable{};
- let txid_hex = "8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be";
- let outp_idx = 0;
- let test_txo = OutPoint {
- txid: Txid::from_hex(txid_hex).unwrap(),
- index: outp_idx,
- };
- // Create the tmp file and make it a directory.
- let path = &persister.path_to_channel_data;
- fs::create_dir_all(format!("{}/{}_{}.tmp", path, txid_hex, outp_idx)).unwrap();
- match persister.write_channel_data(test_txo, &test_writeable) {
- Err(e) => {
- #[cfg(not(target_os = "windows"))]
- assert_eq!(e.kind(), io::ErrorKind::Other);
- #[cfg(target_os = "windows")]
- assert_eq!(e.kind(), io::ErrorKind::PermissionDenied);
- }
- _ => panic!("Unexpected error message")
- }
- }
-
// Test that if the persister's path to channel data is read-only, writing a
// monitor to it results in the persister returning a PermanentFailure.
// Windows ignores the read-only flag for folders, so this test is Unix-only.
--- /dev/null
+use std::fs;
+use std::path::{Path, PathBuf};
+
+#[cfg(not(target_os = "windows"))]
+use std::os::unix::io::AsRawFd;
+
+pub(crate) trait DiskWriteable {
+ fn write_to_file(&self, writer: &mut fs::File) -> Result<(), std::io::Error>;
+}
+
+pub fn get_full_filepath(filepath: String, filename: String) -> String {
+ let mut path = PathBuf::from(filepath);
+ path.push(filename);
+ path.to_str().unwrap().to_string()
+}
+
+#[allow(bare_trait_objects)]
+pub(crate) fn write_to_file<D: DiskWriteable>(path: String, filename: String, data: &D) -> std::io::Result<()> {
+ fs::create_dir_all(path.clone())?;
+ // Do a crazy dance with lots of fsync()s to be overly cautious here...
+ // We never want to end up in a state where we've lost the old data, or end up using the
+ // old data on power loss after we've returned.
+ // The way to atomically write a file on Unix platforms is:
+ // open(tmpname), write(tmpfile), fsync(tmpfile), close(tmpfile), rename(), fsync(dir)
+ let filename_with_path = get_full_filepath(path, filename);
+ let tmp_filename = format!("{}.tmp", filename_with_path);
+
+ {
+ // Note that going by rust-lang/rust@d602a6b, on MacOS it is only safe to use
+ // rust stdlib 1.36 or higher.
+ let mut f = fs::File::create(&tmp_filename)?;
+ data.write_to_file(&mut f)?;
+ f.sync_all()?;
+ }
+ fs::rename(&tmp_filename, &filename_with_path)?;
+ // Fsync the parent directory on Unix.
+ #[cfg(not(target_os = "windows"))]
+ {
+ let path = Path::new(&filename_with_path).parent().unwrap();
+ let dir_file = fs::OpenOptions::new().read(true).open(path)?;
+ unsafe { libc::fsync(dir_file.as_raw_fd()); }
+ }
+ Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+ use super::{DiskWriteable, get_full_filepath, write_to_file};
+ use std::fs;
+ use std::io;
+ use std::io::Write;
+
+ struct TestWriteable{}
+ impl DiskWriteable for TestWriteable {
+ fn write_to_file(&self, writer: &mut fs::File) -> Result<(), io::Error> {
+ writer.write_all(&[42; 1])
+ }
+ }
+
+ // Test that if the persister's path to channel data is read-only, writing
+ // data to it fails. Windows ignores the read-only flag for folders, so this
+ // test is Unix-only.
+ #[cfg(not(target_os = "windows"))]
+ #[test]
+ fn test_readonly_dir() {
+ let test_writeable = TestWriteable{};
+ let filename = "test_readonly_dir_persister_filename".to_string();
+ let path = "test_readonly_dir_persister_dir";
+ fs::create_dir_all(path.to_string()).unwrap();
+ let mut perms = fs::metadata(path.to_string()).unwrap().permissions();
+ perms.set_readonly(true);
+ fs::set_permissions(path.to_string(), perms).unwrap();
+ match write_to_file(path.to_string(), filename, &test_writeable) {
+ Err(e) => assert_eq!(e.kind(), io::ErrorKind::PermissionDenied),
+ _ => panic!("Unexpected error message")
+ }
+ }
+
+ // Test failure to rename in the process of atomically creating a channel
+ // monitor's file. We induce this failure by making the `tmp` file a
+ // directory.
+ // Explanation: given "from" = the file being renamed, "to" = the
+ // renamee that already exists: Windows should fail because it'll fail
+ // whenever "to" is a directory, and Unix should fail because if "from" is a
+ // file, then "to" is also required to be a file.
+ #[test]
+ fn test_rename_failure() {
+ let test_writeable = TestWriteable{};
+ let filename = "test_rename_failure_filename";
+ let path = "test_rename_failure_dir";
+ // Create the channel data file and make it a directory.
+ fs::create_dir_all(get_full_filepath(path.to_string(), filename.to_string())).unwrap();
+ match write_to_file(path.to_string(), filename.to_string(), &test_writeable) {
+ Err(e) => {
+ #[cfg(not(target_os = "windows"))]
+ assert_eq!(e.kind(), io::ErrorKind::Other);
+ #[cfg(target_os = "windows")]
+ assert_eq!(e.kind(), io::ErrorKind::PermissionDenied);
+ }
+ _ => panic!("Unexpected error message")
+ }
+ fs::remove_dir_all(path).unwrap();
+ }
+
+ #[test]
+ fn test_diskwriteable_failure() {
+ struct FailingWriteable {}
+ impl DiskWriteable for FailingWriteable {
+ fn write_to_file(&self, _writer: &mut fs::File) -> Result<(), std::io::Error> {
+ Err(std::io::Error::new(std::io::ErrorKind::Other, "expected failure"))
+ }
+ }
+
+ let filename = "test_diskwriteable_failure";
+ let path = "test_diskwriteable_failure_dir";
+ let test_writeable = FailingWriteable{};
+ match write_to_file(path.to_string(), filename.to_string(), &test_writeable) {
+ Err(e) => {
+ assert_eq!(e.kind(), std::io::ErrorKind::Other);
+ assert_eq!(e.get_ref().unwrap().to_string(), "expected failure");
+ },
+ _ => panic!("unexpected result")
+ }
+ fs::remove_dir_all(path).unwrap();
+ }
+
+ // Test failure to create the temporary file in the persistence process.
+ // We induce this failure by having the temp file already exist and be a
+ // directory.
+ #[test]
+ fn test_tmp_file_creation_failure() {
+ let test_writeable = TestWriteable{};
+ let filename = "test_tmp_file_creation_failure_filename".to_string();
+ let path = "test_tmp_file_creation_failure_dir".to_string();
+
+ // Create the tmp file and make it a directory.
+ let tmp_path = get_full_filepath(path.clone(), format!("{}.tmp", filename.clone()));
+ fs::create_dir_all(tmp_path).unwrap();
+ match write_to_file(path, filename, &test_writeable) {
+ Err(e) => {
+ #[cfg(not(target_os = "windows"))]
+ assert_eq!(e.kind(), io::ErrorKind::Other);
+ #[cfg(target_os = "windows")]
+ assert_eq!(e.kind(), io::ErrorKind::PermissionDenied);
+ }
+ _ => panic!("Unexpected error message")
+ }
+ }
+}
projects / rust-lightning / commitdiff