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-rw-r--r--internal/fusefrontend/compat_linux.go19
1 files changed, 18 insertions, 1 deletions
diff --git a/internal/fusefrontend/compat_linux.go b/internal/fusefrontend/compat_linux.go
index 4108792..8a20d5d 100644
--- a/internal/fusefrontend/compat_linux.go
+++ b/internal/fusefrontend/compat_linux.go
@@ -1,6 +1,13 @@
package fusefrontend
-import "syscall"
+import (
+ "sync"
+ "syscall"
+)
+
+import "github.com/rfjakob/gocryptfs/internal/toggledlog"
+
+var preallocWarn sync.Once
// prealloc - preallocate space without changing the file size. This prevents
// us from running out of space in the middle of an operation.
@@ -13,6 +20,16 @@ func prealloc(fd int, off int64, len int64) (err error) {
// signal and we should try again.
continue
}
+ if err == syscall.EOPNOTSUPP {
+ // ZFS does not support fallocate which caused gocryptfs to abort
+ // every write operation: https://github.com/rfjakob/gocryptfs/issues/22
+ preallocWarn.Do(func() {
+ toggledlog.Warn.Printf("Warning: The underlying filesystem " +
+ "does not support fallocate(2). gocryptfs will continue working " +
+ "but is no longer resistant against out-of-space errors.\n")
+ })
+ return nil
+ }
return err
}
}