resolve issue : when the host disk full, the volume server will core dump

weed/storage/volume_create.go

@@ -11,8 +11,11 @@ import (
 
 func createVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (backend.BackendStorageFile, error) {
 	file, e := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
+	if e != nil {
+		return nil, e
+	}
 	if preallocate > 0 {
 		glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)
 	}
-	return backend.NewDiskFile(file), e
+	return backend.NewDiskFile(file), nil
 }

weed/storage/volume_create_linux.go

@@ -12,9 +12,12 @@ import (
 
 func createVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (backend.BackendStorageFile, error) {
 	file, e := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
+	if e != nil {
+		return nil, e
+	}
 	if preallocate != 0 {
 		syscall.Fallocate(int(file.Fd()), 1, 0, preallocate)
 		glog.V(0).Infof("Preallocated %d bytes disk space for %s", preallocate, fileName)
 	}
-	return backend.NewDiskFile(file), e
+	return backend.NewDiskFile(file), nil
 }

weed/storage/volume_create_windows.go

@@ -12,17 +12,22 @@ import (
 )
 
 func createVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (backend.BackendStorageFile, error) {
-
 	if preallocate > 0 {
 		glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)
 	}
 
 	if memoryMapSizeMB > 0 {
 		file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT, 0644, true)
-		return memory_map.NewMemoryMappedFile(file, memoryMapSizeMB), e
+		if e != nil {
+			return nil, e
+		}
+		return memory_map.NewMemoryMappedFile(file, memoryMapSizeMB), nil
 	} else {
 		file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT|windows.O_TRUNC, 0644, false)
-		return backend.NewDiskFile(file), e
+		if e != nil {
+			return nil, e
+		}
+		return backend.NewDiskFile(file), nil
 	}
 
 }