[VOL-2235] Mocks and interfaces for rw-core
This update consists of mocks that are used by the rw-core
during unit testing. It also includes interfaces used for unit
tests.
Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/vendor/go.etcd.io/etcd/pkg/fileutil/preallocate_darwin.go b/vendor/go.etcd.io/etcd/pkg/fileutil/preallocate_darwin.go
new file mode 100644
index 0000000..5a6dccf
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/pkg/fileutil/preallocate_darwin.go
@@ -0,0 +1,65 @@
+// Copyright 2016 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build darwin
+
+package fileutil
+
+import (
+ "os"
+ "syscall"
+ "unsafe"
+)
+
+func preallocExtend(f *os.File, sizeInBytes int64) error {
+ if err := preallocFixed(f, sizeInBytes); err != nil {
+ return err
+ }
+ return preallocExtendTrunc(f, sizeInBytes)
+}
+
+func preallocFixed(f *os.File, sizeInBytes int64) error {
+ // allocate all requested space or no space at all
+ // TODO: allocate contiguous space on disk with F_ALLOCATECONTIG flag
+ fstore := &syscall.Fstore_t{
+ Flags: syscall.F_ALLOCATEALL,
+ Posmode: syscall.F_PEOFPOSMODE,
+ Length: sizeInBytes}
+ p := unsafe.Pointer(fstore)
+ _, _, errno := syscall.Syscall(syscall.SYS_FCNTL, f.Fd(), uintptr(syscall.F_PREALLOCATE), uintptr(p))
+ if errno == 0 || errno == syscall.ENOTSUP {
+ return nil
+ }
+
+ // wrong argument to fallocate syscall
+ if errno == syscall.EINVAL {
+ // filesystem "st_blocks" are allocated in the units of
+ // "Allocation Block Size" (run "diskutil info /" command)
+ var stat syscall.Stat_t
+ syscall.Fstat(int(f.Fd()), &stat)
+
+ // syscall.Statfs_t.Bsize is "optimal transfer block size"
+ // and contains matching 4096 value when latest OS X kernel
+ // supports 4,096 KB filesystem block size
+ var statfs syscall.Statfs_t
+ syscall.Fstatfs(int(f.Fd()), &statfs)
+ blockSize := int64(statfs.Bsize)
+
+ if stat.Blocks*blockSize >= sizeInBytes {
+ // enough blocks are already allocated
+ return nil
+ }
+ }
+ return errno
+}