rclone/vfs/read_write_test.go
Nick Craig-Wood 84191ac6dc vfs: fix incorrect modtime for mv into mount with --vfs-cache-modes write
When a file has its modtime set while it is open we delay setting the
modtime until the file is closed.

The file is then uploaded in Flush. In Release we check the cached
file has been uploaded by comparing modtimes and or hashes and upload
it again if it has changed.

Before this change we forgot to change the time on the cached file
when we updated the time file on the object, so this mean that Release
reset the time to the wrong time and uploaded the file again on
remotes which don't support hashes (eg crypt).

The fix was to set the modtime of the cached file at the same time we
set the modtime of the remote object. This means that the files check
as identical in Release so it doesn't try to upload the file.

This means that we avoid a double upload and the modtime is correct.

See: https://forum.rclone.org/t/modification-time-with-vfs-cache/13906/8
2020-01-19 12:52:48 +00:00

743 lines
18 KiB
Go

package vfs
import (
"context"
"fmt"
"io"
"io/ioutil"
"os"
"testing"
"time"
"github.com/pkg/errors"
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/fs/operations"
"github.com/rclone/rclone/fstest"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func cleanup(t *testing.T, r *fstest.Run, vfs *VFS) {
assert.NoError(t, vfs.CleanUp())
vfs.Shutdown()
r.Finalise()
}
// Create a file and open it with the flags passed in
func rwHandleCreateFlags(t *testing.T, r *fstest.Run, create bool, filename string, flags int) (*VFS, *RWFileHandle) {
opt := DefaultOpt
opt.CacheMode = CacheModeFull
vfs := New(r.Fremote, &opt)
if create {
file1 := r.WriteObject(context.Background(), filename, "0123456789abcdef", t1)
fstest.CheckItems(t, r.Fremote, file1)
}
h, err := vfs.OpenFile(filename, flags, 0777)
require.NoError(t, err)
fh, ok := h.(*RWFileHandle)
require.True(t, ok)
return vfs, fh
}
// Open a file for read
func rwHandleCreateReadOnly(t *testing.T, r *fstest.Run) (*VFS, *RWFileHandle) {
return rwHandleCreateFlags(t, r, true, "dir/file1", os.O_RDONLY)
}
// Open a file for write
func rwHandleCreateWriteOnly(t *testing.T, r *fstest.Run) (*VFS, *RWFileHandle) {
return rwHandleCreateFlags(t, r, false, "file1", os.O_WRONLY|os.O_CREATE)
}
// read data from the string
func rwReadString(t *testing.T, fh *RWFileHandle, n int) string {
buf := make([]byte, n)
n, err := fh.Read(buf)
if err != io.EOF {
assert.NoError(t, err)
}
return string(buf[:n])
}
func TestRWFileHandleMethodsRead(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateReadOnly(t, r)
defer cleanup(t, r, vfs)
// String
assert.Equal(t, "dir/file1 (rw)", fh.String())
assert.Equal(t, "<nil *RWFileHandle>", (*RWFileHandle)(nil).String())
assert.Equal(t, "<nil *RWFileHandle.file>", new(RWFileHandle).String())
// Node
node := fh.Node()
assert.Equal(t, "file1", node.Name())
// Size
assert.Equal(t, int64(16), fh.Size())
// No opens yet
assert.Equal(t, 0, fh.file.rwOpens())
// Read 1
assert.Equal(t, "0", rwReadString(t, fh, 1))
// Open after the read
assert.Equal(t, 1, fh.file.rwOpens())
// Read remainder
assert.Equal(t, "123456789abcdef", rwReadString(t, fh, 256))
// Read EOF
buf := make([]byte, 16)
_, err := fh.Read(buf)
assert.Equal(t, io.EOF, err)
// Sync
err = fh.Sync()
assert.NoError(t, err)
// Stat
var fi os.FileInfo
fi, err = fh.Stat()
assert.NoError(t, err)
assert.Equal(t, int64(16), fi.Size())
assert.Equal(t, "file1", fi.Name())
// Close
assert.False(t, fh.closed)
assert.Equal(t, nil, fh.Close())
assert.True(t, fh.closed)
// No opens again
assert.Equal(t, 0, fh.file.rwOpens())
// Close again
assert.Equal(t, ECLOSED, fh.Close())
}
func TestRWFileHandleSeek(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateReadOnly(t, r)
defer cleanup(t, r, vfs)
assert.Equal(t, fh.opened, false)
// Check null seeks don't open the file
n, err := fh.Seek(0, io.SeekStart)
assert.NoError(t, err)
assert.Equal(t, int64(0), n)
assert.Equal(t, fh.opened, false)
n, err = fh.Seek(0, io.SeekCurrent)
assert.NoError(t, err)
assert.Equal(t, int64(0), n)
assert.Equal(t, fh.opened, false)
assert.Equal(t, "0", rwReadString(t, fh, 1))
// 0 means relative to the origin of the file,
n, err = fh.Seek(5, io.SeekStart)
assert.NoError(t, err)
assert.Equal(t, int64(5), n)
assert.Equal(t, "5", rwReadString(t, fh, 1))
// 1 means relative to the current offset
n, err = fh.Seek(-3, io.SeekCurrent)
assert.NoError(t, err)
assert.Equal(t, int64(3), n)
assert.Equal(t, "3", rwReadString(t, fh, 1))
// 2 means relative to the end.
n, err = fh.Seek(-3, io.SeekEnd)
assert.NoError(t, err)
assert.Equal(t, int64(13), n)
assert.Equal(t, "d", rwReadString(t, fh, 1))
// Seek off the end
_, err = fh.Seek(100, io.SeekStart)
assert.NoError(t, err)
// Get the error on read
buf := make([]byte, 16)
l, err := fh.Read(buf)
assert.Equal(t, io.EOF, err)
assert.Equal(t, 0, l)
// Close
assert.Equal(t, nil, fh.Close())
}
func TestRWFileHandleReadAt(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateReadOnly(t, r)
defer cleanup(t, r, vfs)
// read from start
buf := make([]byte, 1)
n, err := fh.ReadAt(buf, 0)
require.NoError(t, err)
assert.Equal(t, 1, n)
assert.Equal(t, "0", string(buf[:n]))
// seek forwards
n, err = fh.ReadAt(buf, 5)
require.NoError(t, err)
assert.Equal(t, 1, n)
assert.Equal(t, "5", string(buf[:n]))
// seek backwards
n, err = fh.ReadAt(buf, 1)
require.NoError(t, err)
assert.Equal(t, 1, n)
assert.Equal(t, "1", string(buf[:n]))
// read exactly to the end
buf = make([]byte, 6)
n, err = fh.ReadAt(buf, 10)
require.NoError(t, err)
assert.Equal(t, 6, n)
assert.Equal(t, "abcdef", string(buf[:n]))
// read off the end
buf = make([]byte, 256)
n, err = fh.ReadAt(buf, 10)
assert.Equal(t, io.EOF, err)
assert.Equal(t, 6, n)
assert.Equal(t, "abcdef", string(buf[:n]))
// read starting off the end
n, err = fh.ReadAt(buf, 100)
assert.Equal(t, io.EOF, err)
assert.Equal(t, 0, n)
// Properly close the file
assert.NoError(t, fh.Close())
// check reading on closed file
_, err = fh.ReadAt(buf, 100)
assert.Equal(t, ECLOSED, err)
}
func TestRWFileHandleFlushRead(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateReadOnly(t, r)
defer cleanup(t, r, vfs)
// Check Flush does nothing if read not called
err := fh.Flush()
assert.NoError(t, err)
assert.False(t, fh.closed)
// Read data
buf := make([]byte, 256)
n, err := fh.Read(buf)
assert.True(t, err == io.EOF || err == nil)
assert.Equal(t, 16, n)
// Check Flush does nothing if read called
err = fh.Flush()
assert.NoError(t, err)
assert.False(t, fh.closed)
// Check flush does nothing if called again
err = fh.Flush()
assert.NoError(t, err)
assert.False(t, fh.closed)
// Properly close the file
assert.NoError(t, fh.Close())
}
func TestRWFileHandleReleaseRead(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateReadOnly(t, r)
defer cleanup(t, r, vfs)
// Read data
buf := make([]byte, 256)
n, err := fh.Read(buf)
assert.True(t, err == io.EOF || err == nil)
assert.Equal(t, 16, n)
// Check Release closes file
err = fh.Release()
assert.NoError(t, err)
assert.True(t, fh.closed)
// Check Release does nothing if called again
err = fh.Release()
assert.NoError(t, err)
assert.True(t, fh.closed)
}
/// ------------------------------------------------------------
func TestRWFileHandleMethodsWrite(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateWriteOnly(t, r)
defer cleanup(t, r, vfs)
// 1 opens since we opened with O_CREATE and the file didn't
// exist in the cache
assert.Equal(t, 1, fh.file.rwOpens())
// String
assert.Equal(t, "file1 (rw)", fh.String())
assert.Equal(t, "<nil *RWFileHandle>", (*RWFileHandle)(nil).String())
assert.Equal(t, "<nil *RWFileHandle.file>", new(RWFileHandle).String())
// Node
node := fh.Node()
assert.Equal(t, "file1", node.Name())
offset := func() int64 {
n, err := fh.Seek(0, io.SeekCurrent)
require.NoError(t, err)
return n
}
// Offset #1
assert.Equal(t, int64(0), offset())
assert.Equal(t, int64(0), node.Size())
// Size #1
assert.Equal(t, int64(0), fh.Size())
// Write
n, err := fh.Write([]byte("hello"))
assert.NoError(t, err)
assert.Equal(t, 5, n)
// Open after the write
assert.Equal(t, 1, fh.file.rwOpens())
// Offset #2
assert.Equal(t, int64(5), offset())
assert.Equal(t, int64(5), node.Size())
// Size #2
assert.Equal(t, int64(5), fh.Size())
// WriteString
n, err = fh.WriteString(" world!")
assert.NoError(t, err)
assert.Equal(t, 7, n)
// Sync
err = fh.Sync()
assert.NoError(t, err)
// Stat
var fi os.FileInfo
fi, err = fh.Stat()
assert.NoError(t, err)
assert.Equal(t, int64(12), fi.Size())
assert.Equal(t, "file1", fi.Name())
// Truncate
err = fh.Truncate(11)
assert.NoError(t, err)
// Close
assert.NoError(t, fh.Close())
// No opens again
assert.Equal(t, 0, fh.file.rwOpens())
// Check double close
err = fh.Close()
assert.Equal(t, ECLOSED, err)
// check vfs
root, err := vfs.Root()
require.NoError(t, err)
checkListing(t, root, []string{"file1,11,false"})
// check the underlying r.Fremote but not the modtime
file1 := fstest.NewItem("file1", "hello world", t1)
fstest.CheckListingWithPrecision(t, r.Fremote, []fstest.Item{file1}, []string{}, fs.ModTimeNotSupported)
}
func TestRWFileHandleWriteAt(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateWriteOnly(t, r)
defer cleanup(t, r, vfs)
offset := func() int64 {
n, err := fh.Seek(0, io.SeekCurrent)
require.NoError(t, err)
return n
}
// Preconditions
assert.Equal(t, int64(0), offset())
assert.True(t, fh.opened)
assert.False(t, fh.writeCalled)
assert.True(t, fh.changed)
// Write the data
n, err := fh.WriteAt([]byte("hello**"), 0)
assert.NoError(t, err)
assert.Equal(t, 7, n)
// After write
assert.Equal(t, int64(0), offset())
assert.True(t, fh.writeCalled)
// Write more data
n, err = fh.WriteAt([]byte(" world"), 5)
assert.NoError(t, err)
assert.Equal(t, 6, n)
// Close
assert.NoError(t, fh.Close())
// Check can't write on closed handle
n, err = fh.WriteAt([]byte("hello"), 0)
assert.Equal(t, ECLOSED, err)
assert.Equal(t, 0, n)
// check vfs
root, err := vfs.Root()
require.NoError(t, err)
checkListing(t, root, []string{"file1,11,false"})
// check the underlying r.Fremote but not the modtime
file1 := fstest.NewItem("file1", "hello world", t1)
fstest.CheckListingWithPrecision(t, r.Fremote, []fstest.Item{file1}, []string{}, fs.ModTimeNotSupported)
}
func TestRWFileHandleWriteNoWrite(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateWriteOnly(t, r)
defer cleanup(t, r, vfs)
// Close the file without writing to it
err := fh.Close()
if errors.Cause(err) == fs.ErrorCantUploadEmptyFiles {
t.Logf("skipping test: %v", err)
return
}
assert.NoError(t, err)
// Create a different file (not in the cache)
h, err := vfs.OpenFile("file2", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0777)
require.NoError(t, err)
// Close it with Flush and Release
err = h.Flush()
assert.NoError(t, err)
err = h.Release()
assert.NoError(t, err)
// check vfs
root, err := vfs.Root()
require.NoError(t, err)
checkListing(t, root, []string{"file1,0,false", "file2,0,false"})
// check the underlying r.Fremote but not the modtime
file1 := fstest.NewItem("file1", "", t1)
file2 := fstest.NewItem("file2", "", t1)
fstest.CheckListingWithPrecision(t, r.Fremote, []fstest.Item{file1, file2}, []string{}, fs.ModTimeNotSupported)
}
func TestRWFileHandleFlushWrite(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateWriteOnly(t, r)
defer cleanup(t, r, vfs)
// Check that the file has been create and is open
assert.True(t, fh.opened)
// Write some data
n, err := fh.Write([]byte("hello"))
assert.NoError(t, err)
assert.Equal(t, 5, n)
// Check Flush does not close file if write called
err = fh.Flush()
assert.NoError(t, err)
assert.False(t, fh.closed)
// Check flush does nothing if called again
err = fh.Flush()
assert.NoError(t, err)
assert.False(t, fh.closed)
// Check that Close closes the file
err = fh.Close()
assert.NoError(t, err)
assert.True(t, fh.closed)
}
func TestRWFileHandleReleaseWrite(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateWriteOnly(t, r)
defer cleanup(t, r, vfs)
// Write some data
n, err := fh.Write([]byte("hello"))
assert.NoError(t, err)
assert.Equal(t, 5, n)
// Check Release closes file
err = fh.Release()
assert.NoError(t, err)
assert.True(t, fh.closed)
// Check Release does nothing if called again
err = fh.Release()
assert.NoError(t, err)
assert.True(t, fh.closed)
}
// check the size of the file through the open file (if not nil) and via stat
func assertSize(t *testing.T, vfs *VFS, fh *RWFileHandle, filepath string, size int64) {
if fh != nil {
assert.Equal(t, size, fh.Size())
}
fi, err := vfs.Stat(filepath)
require.NoError(t, err)
assert.Equal(t, size, fi.Size())
}
func TestRWFileHandleSizeTruncateExisting(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateFlags(t, r, true, "dir/file1", os.O_WRONLY|os.O_TRUNC)
defer cleanup(t, r, vfs)
// check initial size after opening
assertSize(t, vfs, fh, "dir/file1", 0)
// write some bytes
n, err := fh.Write([]byte("hello"))
assert.NoError(t, err)
assert.Equal(t, 5, n)
// check size after writing
assertSize(t, vfs, fh, "dir/file1", 5)
// close
assert.NoError(t, fh.Close())
// check size after close
assertSize(t, vfs, nil, "dir/file1", 5)
}
func TestRWFileHandleSizeCreateExisting(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateFlags(t, r, true, "dir/file1", os.O_WRONLY|os.O_CREATE)
defer cleanup(t, r, vfs)
// check initial size after opening
assertSize(t, vfs, fh, "dir/file1", 16)
// write some bytes
n, err := fh.Write([]byte("hello"))
assert.NoError(t, err)
assert.Equal(t, 5, n)
// check size after writing
assertSize(t, vfs, fh, "dir/file1", 16)
// write some more bytes
n, err = fh.Write([]byte("helloHELLOhello"))
assert.NoError(t, err)
assert.Equal(t, 15, n)
// check size after writing
assertSize(t, vfs, fh, "dir/file1", 20)
// close
assert.NoError(t, fh.Close())
// check size after close
assertSize(t, vfs, nil, "dir/file1", 20)
}
func TestRWFileHandleSizeCreateNew(t *testing.T) {
r := fstest.NewRun(t)
vfs, fh := rwHandleCreateFlags(t, r, false, "file1", os.O_WRONLY|os.O_CREATE)
defer cleanup(t, r, vfs)
// check initial size after opening
assertSize(t, vfs, fh, "file1", 0)
// write some bytes
n, err := fh.Write([]byte("hello"))
assert.NoError(t, err)
assert.Equal(t, 5, n)
// check size after writing
assertSize(t, vfs, fh, "file1", 5)
// check size after writing
assertSize(t, vfs, fh, "file1", 5)
// close
assert.NoError(t, fh.Close())
// check size after close
assertSize(t, vfs, nil, "file1", 5)
}
func testRWFileHandleOpenTest(t *testing.T, vfs *VFS, test *openTest) {
fileName := "open-test-file"
// first try with file not existing
_, err := vfs.Stat(fileName)
require.True(t, os.IsNotExist(err), test.what)
f, openNonExistentErr := vfs.OpenFile(fileName, test.flags, 0666)
var readNonExistentErr error
var writeNonExistentErr error
if openNonExistentErr == nil {
// read some bytes
buf := []byte{0, 0}
_, readNonExistentErr = f.Read(buf)
// write some bytes
_, writeNonExistentErr = f.Write([]byte("hello"))
// close
err = f.Close()
require.NoError(t, err, test.what)
}
// write the file
f, err = vfs.OpenFile(fileName, os.O_WRONLY|os.O_CREATE, 0777)
require.NoError(t, err, test.what)
_, err = f.Write([]byte("hello"))
require.NoError(t, err, test.what)
err = f.Close()
require.NoError(t, err, test.what)
// then open file and try with file existing
f, openExistingErr := vfs.OpenFile(fileName, test.flags, 0666)
var readExistingErr error
var writeExistingErr error
if openExistingErr == nil {
// read some bytes
buf := []byte{0, 0}
_, readExistingErr = f.Read(buf)
// write some bytes
_, writeExistingErr = f.Write([]byte("HEL"))
// close
err = f.Close()
require.NoError(t, err, test.what)
}
// read the file
f, err = vfs.OpenFile(fileName, os.O_RDONLY, 0)
require.NoError(t, err, test.what)
buf, err := ioutil.ReadAll(f)
require.NoError(t, err, test.what)
err = f.Close()
require.NoError(t, err, test.what)
contents := string(buf)
// remove file
node, err := vfs.Stat(fileName)
require.NoError(t, err, test.what)
err = node.Remove()
require.NoError(t, err, test.what)
// check
assert.Equal(t, test.openNonExistentErr, openNonExistentErr, "openNonExistentErr: %s: want=%v, got=%v", test.what, test.openNonExistentErr, openNonExistentErr)
assert.Equal(t, test.readNonExistentErr, readNonExistentErr, "readNonExistentErr: %s: want=%v, got=%v", test.what, test.readNonExistentErr, readNonExistentErr)
assert.Equal(t, test.writeNonExistentErr, writeNonExistentErr, "writeNonExistentErr: %s: want=%v, got=%v", test.what, test.writeNonExistentErr, writeNonExistentErr)
assert.Equal(t, test.openExistingErr, openExistingErr, "openExistingErr: %s: want=%v, got=%v", test.what, test.openExistingErr, openExistingErr)
assert.Equal(t, test.readExistingErr, readExistingErr, "readExistingErr: %s: want=%v, got=%v", test.what, test.readExistingErr, readExistingErr)
assert.Equal(t, test.writeExistingErr, writeExistingErr, "writeExistingErr: %s: want=%v, got=%v", test.what, test.writeExistingErr, writeExistingErr)
assert.Equal(t, test.contents, contents, test.what)
}
func TestRWFileHandleOpenTests(t *testing.T) {
r := fstest.NewRun(t)
opt := DefaultOpt
opt.CacheMode = CacheModeFull
vfs := New(r.Fremote, &opt)
defer cleanup(t, r, vfs)
for _, test := range openTests {
testRWFileHandleOpenTest(t, vfs, &test)
}
}
// tests mod time on open files
func TestRWFileModTimeWithOpenWriters(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
if !canSetModTime(t, r) {
return
}
vfs, fh := rwHandleCreateWriteOnly(t, r)
mtime := time.Date(2012, time.November, 18, 17, 32, 31, 0, time.UTC)
_, err := fh.Write([]byte{104, 105})
require.NoError(t, err)
err = fh.Node().SetModTime(mtime)
require.NoError(t, err)
// Using Flush/Release to mimic mount instead of Close
err = fh.Flush()
require.NoError(t, err)
err = fh.Release()
require.NoError(t, err)
info, err := vfs.Stat("file1")
require.NoError(t, err)
if r.Fremote.Precision() != fs.ModTimeNotSupported {
// avoid errors because of timezone differences
assert.Equal(t, info.ModTime().Unix(), mtime.Unix(), fmt.Sprintf("Time mismatch: %v != %v", info.ModTime(), mtime))
}
file1 := fstest.NewItem("file1", "hi", mtime)
fstest.CheckItems(t, r.Fremote, file1)
}
func TestRWCacheRename(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
if !operations.CanServerSideMove(r.Fremote) {
t.Skip("skip as can't rename files")
}
opt := DefaultOpt
opt.CacheMode = CacheModeFull
vfs := New(r.Fremote, &opt)
h, err := vfs.OpenFile("rename_me", os.O_WRONLY|os.O_CREATE, 0777)
require.NoError(t, err)
_, err = h.WriteString("hello")
require.NoError(t, err)
fh, ok := h.(*RWFileHandle)
require.True(t, ok)
err = fh.Sync()
require.NoError(t, err)
err = fh.Close()
require.NoError(t, err)
assert.True(t, vfs.cache.exists("rename_me"))
err = vfs.Rename("rename_me", "i_was_renamed")
require.NoError(t, err)
assert.False(t, vfs.cache.exists("rename_me"))
assert.True(t, vfs.cache.exists("i_was_renamed"))
}