* fix(mount): retry saveEntry on transient filer errors, stop mismapping Canceled to EIO
When the mount's gRPC connection to the filer flaps (e.g. a transient
restart or network blip), every in-flight setattr/utimes/chmod/xattr/
rename-driven saveEntry returns "code = Canceled desc = grpc: the client
connection is closing" at the same instant. Two bugs in saveEntry then
turned each of those into a hard EIO for the user:
1. The error was wrapped with fmt.Errorf(... %v ...) before being passed
to grpcErrorToFuseStatus. %v stringifies the status, so
status.FromError could no longer unwrap the gRPC code and the
Canceled→ETIMEDOUT branch in the classifier never fired; every
Canceled error fell through to the default EIO.
2. saveEntry issued a single streamUpdateEntry call with no retry,
unlike doFlush which already wraps its CreateEntry in
retryMetadataFlush. One stream flap therefore propagated straight to
the FUSE caller instead of being ridden out across the 4-attempt /
~7s backoff window.
Wrap the UpdateEntry call in retryMetadataFlush (matching doFlush and
completeAsyncFlush) and switch the wrap verb to %w so the classifier
can still see the gRPC code. This recovers transient closes silently
and, if retries are exhausted, returns ETIMEDOUT instead of EIO.
Reported by rclone users in #9139 where a large concurrent copy
(hundreds of .partial uploads per filer flap) surfaced as walls of EIOs
because each .partial rename's post-setattr hit saveEntry at the worst
possible moment.
* mount: skip saveEntry retries on permanent filer errors
Address gemini-code-assist review on #9141: blindly retrying every
UpdateEntry failure with exponential backoff means interactive FUSE ops
like chmod/utimes/xattr can hang for ~7s before surfacing clearly
permanent errors (NotFound, PermissionDenied, InvalidArgument, etc.).
Introduce retryMetadataFlushIf, a variant of retryMetadataFlush that
accepts a shouldRetry predicate, and an isRetryableFilerError classifier
that short-circuits on a conservative whitelist of terminal gRPC codes.
Transient errors (Canceled / Unavailable / DeadlineExceeded /
ResourceExhausted / Internal) and non-gRPC errors still retry, so the
original fix for #9139 (rclone EIO burst during filer connection
flaps) is preserved.
* Enable writeback_cache and async_dio FUSE options
Fixes#7978
- Update mount_std.go to use EnableWriteback and EnableAsyncDio from go-fuse
- Add go.mod replace directive to use local go-fuse with capability support
- Remove temporary workaround that disabled these options
This enables proper FUSE kernel capability negotiation for writeback cache
and async direct I/O, improving performance for small writes and concurrent
direct I/O operations.
* Address PR review comments
- Remove redundant nil checks for writebackCache and asyncDio flags
- Update go.mod replace directive to use seaweedfs/go-fuse fork instead of local path
* Add TODO comment for go.mod replace directive
The replace directive must use a local path until seaweedfs/go-fuse#1 is merged.
After merge, this should be updated to use the proper version.
* Use seaweedfs/go-fuse v2.9.0 instead of local repository
Replace local path with seaweedfs/go-fuse v2.9.0 fork which includes
the writeback_cache and async_dio capability support.
* Use github.com/seaweedfs/go-fuse/v2 directly without replace directive
- Updated all imports to use github.com/seaweedfs/go-fuse/v2
- Removed replace directive from go.mod
- Using seaweedfs/go-fuse v2.0.0-20260106181308-87f90219ce09 which includes:
* writeback_cache and async_dio support
* Corrected module path
* Update to seaweedfs/go-fuse v2.9.1
Use v2.9.1 tag which includes the corrected module path
(github.com/seaweedfs/go-fuse/v2) along with writeback_cache
and async_dio support.
