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authorJakob Unterwurzacher2021-07-29 20:39:50 +0200
committerJakob Unterwurzacher2021-07-29 20:39:50 +0200
commit0ca302f12aa8be391d6b8e7081b5c75fbec2e872 (patch)
treebdf36873bb3a7cfc6cc5a3c14f63dede7d33c2a0
parente83b79b4c2e8619f0f9622bbafc39d04eeced3f0 (diff)
fusefrontend: implement fsync on directories
Fixes https://github.com/rfjakob/gocryptfs/issues/587
-rw-r--r--internal/fusefrontend/file.go5
-rw-r--r--internal/fusefrontend/node.go19
-rw-r--r--tests/defaults/main_test.go28
3 files changed, 51 insertions, 1 deletions
diff --git a/internal/fusefrontend/file.go b/internal/fusefrontend/file.go
index cbf78e9..4866e65 100644
--- a/internal/fusefrontend/file.go
+++ b/internal/fusefrontend/file.go
@@ -427,7 +427,10 @@ func (f *File) Flush(ctx context.Context) syscall.Errno {
return fs.ToErrno(err)
}
-// Fsync FUSE call
+// Fsync: handles FUSE opcode FSYNC
+//
+// Unfortunately, as Node.Fsync is also defined and takes precedence,
+// File.Fsync is never called at the moment.
func (f *File) Fsync(ctx context.Context, flags uint32) (errno syscall.Errno) {
f.fdLock.RLock()
defer f.fdLock.RUnlock()
diff --git a/internal/fusefrontend/node.go b/internal/fusefrontend/node.go
index dd446a3..5d3c178 100644
--- a/internal/fusefrontend/node.go
+++ b/internal/fusefrontend/node.go
@@ -447,3 +447,22 @@ func (n *Node) Rename(ctx context.Context, name string, newParent fs.InodeEmbedd
}
return 0
}
+
+// Fsync: handles FUSE opcodes FSYNC & FDIRSYNC
+//
+// Note: f is always set to nil by go-fuse
+func (n *Node) Fsync(ctx context.Context, f fs.FileHandle, flags uint32) syscall.Errno {
+ dirfd, cName, errno := n.prepareAtSyscallMyself()
+ if errno != 0 {
+ return errno
+ }
+ defer syscall.Close(dirfd)
+
+ fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_RDONLY|syscall.O_NOFOLLOW, 0)
+ if err != nil {
+ return fs.ToErrno(err)
+ }
+ defer syscall.Close(fd)
+
+ return fs.ToErrno(syscall.Fsync(fd))
+}
diff --git a/tests/defaults/main_test.go b/tests/defaults/main_test.go
index b356f41..2513860 100644
--- a/tests/defaults/main_test.go
+++ b/tests/defaults/main_test.go
@@ -11,6 +11,7 @@ import (
"runtime"
"strings"
"sync"
+ "syscall"
"testing"
"github.com/rfjakob/gocryptfs/tests/test_helpers"
@@ -394,3 +395,30 @@ func TestMaxlen(t *testing.T) {
t.Errorf("wrong output: %s", string(out))
}
}
+
+func TestFsync(t *testing.T) {
+ fileName := test_helpers.DefaultPlainDir + "/" + t.Name() + ".file"
+ fileFD, err := syscall.Creat(fileName, 0600)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer syscall.Close(fileFD)
+ dirName := test_helpers.DefaultPlainDir + "/" + t.Name() + ".dir"
+ if err := os.Mkdir(dirName, 0700); err != nil {
+ t.Fatal(err)
+ }
+ dirFD, err := syscall.Open(dirName, syscall.O_RDONLY, 0)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer syscall.Close(dirFD)
+
+ err = syscall.Fsync(dirFD)
+ if err != nil {
+ t.Fatal(err)
+ }
+ err = syscall.Fsync(fileFD)
+ if err != nil {
+ t.Fatal(err)
+ }
+}