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Merge pull request #5146 from MichaelEischer/inline-extended-stat

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fs: Inline ExtendedFileInfo
This commit is contained in:
Michael Eischer 2024-11-30 17:23:34 +01:00 committed by GitHub
commit 9a674ecc34
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GPG key ID: B5690EEEBB952194
24 changed files with 170 additions and 351 deletions
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2
cmd/restic/cmd_backup_integration_test.go
View file

@ -132,7 +132,7 @@ type vssDeleteOriginalFS struct {
hasRemoved bool
}
func (f *vssDeleteOriginalFS) Lstat(name string) (os.FileInfo, error) {
func (f *vssDeleteOriginalFS) Lstat(name string) (*fs.ExtendedFileInfo, error) {
if !f.hasRemoved {
// call Lstat to trigger snapshot creation
_, _ = f.FS.Lstat(name)

25
internal/archiver/archiver.go
View file

@ -25,7 +25,7 @@ type SelectByNameFunc func(item string) bool
// SelectFunc returns true for all items that should be included (files and
// dirs). If false is returned, files are ignored and dirs are not even walked.
type SelectFunc func(item string, fi os.FileInfo, fs fs.FS) bool
type SelectFunc func(item string, fi *fs.ExtendedFileInfo, fs fs.FS) bool
// ErrorFunc is called when an error during archiving occurs. When nil is
// returned, the archiver continues, otherwise it aborts and passes the error
@ -189,7 +189,7 @@ func New(repo archiverRepo, filesystem fs.FS, opts Options) *Archiver {
arch := &Archiver{
Repo: repo,
SelectByName: func(_ string) bool { return true },
Select: func(_ string, _ os.FileInfo, _ fs.FS) bool { return true },
Select: func(_ string, _ *fs.ExtendedFileInfo, _ fs.FS) bool { return true },
FS: filesystem,
Options: opts.ApplyDefaults(),
@ -505,12 +505,12 @@ func (arch *Archiver) save(ctx context.Context, snPath, target string, previous
}
switch {
case fi.Mode().IsRegular():
case fi.Mode.IsRegular():
debug.Log(" %v regular file", target)
// check if the file has not changed before performing a fopen operation (more expensive, specially
// in network filesystems)
if previous != nil && !fileChanged(arch.FS, fi, previous, arch.ChangeIgnoreFlags) {
if previous != nil && !fileChanged(fi, previous, arch.ChangeIgnoreFlags) {
if arch.allBlobsPresent(previous) {
debug.Log("%v hasn't changed, using old list of blobs", target)
arch.trackItem(snPath, previous, previous, ItemStats{}, time.Since(start))
@ -555,7 +555,7 @@ func (arch *Archiver) save(ctx context.Context, snPath, target string, previous
}
// make sure it's still a file
if !fi.Mode().IsRegular() {
if !fi.Mode.IsRegular() {
err = errors.Errorf("file %q changed type, refusing to archive", target)
return filterError(err)
}
@ -571,7 +571,7 @@ func (arch *Archiver) save(ctx context.Context, snPath, target string, previous
arch.trackItem(snPath, previous, node, stats, time.Since(start))
})
case fi.IsDir():
case fi.Mode.IsDir():
debug.Log(" %v dir", target)
snItem := snPath + "/"
@ -592,7 +592,7 @@ func (arch *Archiver) save(ctx context.Context, snPath, target string, previous
return futureNode{}, false, err
}
case fi.Mode()&os.ModeSocket > 0:
case fi.Mode&os.ModeSocket > 0:
debug.Log(" %v is a socket, ignoring", target)
return futureNode{}, true, nil
@ -618,27 +618,26 @@ func (arch *Archiver) save(ctx context.Context, snPath, target string, previous
// fileChanged tries to detect whether a file's content has changed compared
// to the contents of node, which describes the same path in the parent backup.
// It should only be run for regular files.
func fileChanged(fs fs.FS, fi os.FileInfo, node *restic.Node, ignoreFlags uint) bool {
func fileChanged(fi *fs.ExtendedFileInfo, node *restic.Node, ignoreFlags uint) bool {
switch {
case node == nil:
return true
case node.Type != restic.NodeTypeFile:
// We're only called for regular files, so this is a type change.
return true
case uint64(fi.Size()) != node.Size:
case uint64(fi.Size) != node.Size:
return true
case !fi.ModTime().Equal(node.ModTime):
case !fi.ModTime.Equal(node.ModTime):
return true
}
checkCtime := ignoreFlags&ChangeIgnoreCtime == 0
checkInode := ignoreFlags&ChangeIgnoreInode == 0
extFI := fs.ExtendedStat(fi)
switch {
case checkCtime && !extFI.ChangeTime.Equal(node.ChangeTime):
case checkCtime && !fi.ChangeTime.Equal(node.ChangeTime):
return true
case checkInode && node.Inode != extFI.Inode:
case checkInode && node.Inode != fi.Inode:
return true
}

60
internal/archiver/archiver_test.go
View file

@ -516,13 +516,13 @@ func chmodTwice(t testing.TB, name string) {
rtest.OK(t, err)
}
func lstat(t testing.TB, name string) os.FileInfo {
func lstat(t testing.TB, name string) *fs.ExtendedFileInfo {
fi, err := os.Lstat(name)
if err != nil {
t.Fatal(err)
}
return fi
return fs.ExtendedStat(fi)
}
func setTimestamp(t testing.TB, filename string, atime, mtime time.Time) {
@ -660,7 +660,7 @@ func TestFileChanged(t *testing.T) {
rename(t, filename, tempname)
save(t, filename, defaultContent)
remove(t, tempname)
setTimestamp(t, filename, fi.ModTime(), fi.ModTime())
setTimestamp(t, filename, fi.ModTime, fi.ModTime)
},
ChangeIgnore: ChangeIgnoreCtime | ChangeIgnoreInode,
SameFile: true,
@ -683,10 +683,11 @@ func TestFileChanged(t *testing.T) {
save(t, filename, content)
fs := &fs.Local{}
fiBefore := lstat(t, filename)
fiBefore, err := fs.Lstat(filename)
rtest.OK(t, err)
node := nodeFromFile(t, fs, filename)
if fileChanged(fs, fiBefore, node, 0) {
if fileChanged(fiBefore, node, 0) {
t.Fatalf("unchanged file detected as changed")
}
@ -696,12 +697,12 @@ func TestFileChanged(t *testing.T) {
if test.SameFile {
// file should be detected as unchanged
if fileChanged(fs, fiAfter, node, test.ChangeIgnore) {
if fileChanged(fiAfter, node, test.ChangeIgnore) {
t.Fatalf("unmodified file detected as changed")
}
} else {
// file should be detected as changed
if !fileChanged(fs, fiAfter, node, test.ChangeIgnore) && !test.SameFile {
if !fileChanged(fiAfter, node, test.ChangeIgnore) && !test.SameFile {
t.Fatalf("modified file detected as unchanged")
}
}
@ -718,7 +719,7 @@ func TestFilChangedSpecialCases(t *testing.T) {
t.Run("nil-node", func(t *testing.T) {
fi := lstat(t, filename)
if !fileChanged(&fs.Local{}, fi, nil, 0) {
if !fileChanged(fi, nil, 0) {
t.Fatal("nil node detected as unchanged")
}
})
@ -727,7 +728,7 @@ func TestFilChangedSpecialCases(t *testing.T) {
fi := lstat(t, filename)
node := nodeFromFile(t, &fs.Local{}, filename)
node.Type = restic.NodeTypeSymlink
if !fileChanged(&fs.Local{}, fi, node, 0) {
if !fileChanged(fi, node, 0) {
t.Fatal("node with changed type detected as unchanged")
}
})
@ -1520,7 +1521,7 @@ func TestArchiverSnapshotSelect(t *testing.T) {
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo, _ fs.FS) bool {
selFn: func(item string, fi *fs.ExtendedFileInfo, _ fs.FS) bool {
return true
},
},
@ -1537,7 +1538,7 @@ func TestArchiverSnapshotSelect(t *testing.T) {
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo, _ fs.FS) bool {
selFn: func(item string, fi *fs.ExtendedFileInfo, _ fs.FS) bool {
return false
},
err: "snapshot is empty",
@ -1564,7 +1565,7 @@ func TestArchiverSnapshotSelect(t *testing.T) {
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo, _ fs.FS) bool {
selFn: func(item string, fi *fs.ExtendedFileInfo, _ fs.FS) bool {
return filepath.Ext(item) != ".txt"
},
},
@ -1588,7 +1589,7 @@ func TestArchiverSnapshotSelect(t *testing.T) {
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo, fs fs.FS) bool {
selFn: func(item string, fi *fs.ExtendedFileInfo, fs fs.FS) bool {
return fs.Base(item) != "subdir"
},
},
@ -1597,7 +1598,7 @@ func TestArchiverSnapshotSelect(t *testing.T) {
src: TestDir{
"foo": TestFile{Content: "foo"},
},
selFn: func(item string, fi os.FileInfo, fs fs.FS) bool {
selFn: func(item string, fi *fs.ExtendedFileInfo, fs fs.FS) bool {
return fs.IsAbs(item)
},
},
@ -2202,7 +2203,7 @@ func snapshot(t testing.TB, repo archiverRepo, fs fs.FS, parent *restic.Snapshot
type overrideFS struct {
fs.FS
overrideFI os.FileInfo
overrideFI *fs.ExtendedFileInfo
resetFIOnRead bool
overrideNode *restic.Node
overrideErr error
@ -2225,7 +2226,7 @@ type overrideFile struct {
ofs *overrideFS
}
func (f overrideFile) Stat() (os.FileInfo, error) {
func (f overrideFile) Stat() (*fs.ExtendedFileInfo, error) {
if f.ofs.overrideFI == nil {
return f.File.Stat()
}
@ -2302,19 +2303,26 @@ func TestMetadataChanged(t *testing.T) {
t.Fatalf("metadata does not match:\n%v", cmp.Diff(want, node2))
}
// modify the mode by wrapping it in a new struct, uses the consts defined above
fs.overrideFI = wrapFileInfo(fi)
rtest.Assert(t, !fileChanged(fs, fs.overrideFI, node2, 0), "testfile must not be considered as changed")
// modify the mode and UID/GID
modFI := *fi
modFI.Mode = mockFileInfoMode
if runtime.GOOS != "windows" {
modFI.UID = mockFileInfoUID
modFI.GID = mockFileInfoGID
}
fs.overrideFI = &modFI
rtest.Assert(t, !fileChanged(fs.overrideFI, node2, 0), "testfile must not be considered as changed")
// set the override values in the 'want' node which
want.Mode = 0400
want.Mode = mockFileInfoMode
// ignore UID and GID on Windows
if runtime.GOOS != "windows" {
want.UID = 51234
want.GID = 51235
want.UID = mockFileInfoUID
want.GID = mockFileInfoGID
}
// update mock node accordingly
fs.overrideNode.Mode = 0400
fs.overrideNode.Mode = want.Mode
fs.overrideNode.UID = want.UID
fs.overrideNode.GID = want.GID
@ -2455,10 +2463,12 @@ func TestIrregularFile(t *testing.T) {
tempfile := filepath.Join(tempdir, "testfile")
fi := lstat(t, "testfile")
// patch mode to irregular
fi.Mode = (fi.Mode &^ os.ModeType) | os.ModeIrregular
override := &overrideFS{
FS: fs.Local{},
overrideFI: wrapIrregularFileInfo(fi),
overrideFI: fi,
overrideNode: &restic.Node{
Type: restic.NodeTypeIrregular,
},
@ -2497,7 +2507,7 @@ type missingFile struct {
fs.File
}
func (f *missingFile) Stat() (os.FileInfo, error) {
func (f *missingFile) Stat() (*fs.ExtendedFileInfo, error) {
return nil, os.ErrNotExist
}

44
internal/archiver/archiver_unix_test.go
View file

@ -4,8 +4,6 @@
package archiver
import (
"os"
"syscall"
"testing"
"github.com/restic/restic/internal/feature"
@ -14,48 +12,6 @@ import (
rtest "github.com/restic/restic/internal/test"
)
type wrappedFileInfo struct {
os.FileInfo
sys interface{}
mode os.FileMode
}
func (fi wrappedFileInfo) Sys() interface{} {
return fi.sys
}
func (fi wrappedFileInfo) Mode() os.FileMode {
return fi.mode
}
// wrapFileInfo returns a new os.FileInfo with the mode, owner, and group fields changed.
func wrapFileInfo(fi os.FileInfo) os.FileInfo {
// get the underlying stat_t and modify the values
stat := fi.Sys().(*syscall.Stat_t)
stat.Mode = mockFileInfoMode
stat.Uid = mockFileInfoUID
stat.Gid = mockFileInfoGID
// wrap the os.FileInfo so we can return a modified stat_t
res := wrappedFileInfo{
FileInfo: fi,
sys: stat,
mode: mockFileInfoMode,
}
return res
}
// wrapIrregularFileInfo returns a new os.FileInfo with the mode changed to irregular file
func wrapIrregularFileInfo(fi os.FileInfo) os.FileInfo {
// wrap the os.FileInfo so we can return a modified stat_t
return wrappedFileInfo{
FileInfo: fi,
sys: fi.Sys().(*syscall.Stat_t),
mode: (fi.Mode() &^ os.ModeType) | os.ModeIrregular,
}
}
func statAndSnapshot(t *testing.T, repo archiverRepo, name string) (*restic.Node, *restic.Node) {
want := nodeFromFile(t, &fs.Local{}, name)
_, node := snapshot(t, repo, &fs.Local{}, nil, name)

36
internal/archiver/archiver_windows_test.go
View file

@ -1,36 +0,0 @@
//go:build windows
// +build windows
package archiver
import (
"os"
)
type wrappedFileInfo struct {
os.FileInfo
mode os.FileMode
}
func (fi wrappedFileInfo) Mode() os.FileMode {
return fi.mode
}
// wrapFileInfo returns a new os.FileInfo with the mode, owner, and group fields changed.
func wrapFileInfo(fi os.FileInfo) os.FileInfo {
// wrap the os.FileInfo and return the modified mode, uid and gid are ignored on Windows
res := wrappedFileInfo{
FileInfo: fi,
mode: mockFileInfoMode,
}
return res
}
// wrapIrregularFileInfo returns a new os.FileInfo with the mode changed to irregular file
func wrapIrregularFileInfo(fi os.FileInfo) os.FileInfo {
return wrappedFileInfo{
FileInfo: fi,
mode: (fi.Mode() &^ os.ModeType) | os.ModeIrregular,
}
}

46
internal/archiver/exclude.go
View file

@ -5,6 +5,7 @@ import (
"fmt"
"io"
"os"
"runtime"
"strings"
"sync"
@ -21,7 +22,7 @@ type RejectByNameFunc func(path string) bool
// RejectFunc is a function that takes a filename and os.FileInfo of a
// file that would be included in the backup. The function returns true if it
// should be excluded (rejected) from the backup.
type RejectFunc func(path string, fi os.FileInfo, fs fs.FS) bool
type RejectFunc func(path string, fi *fs.ExtendedFileInfo, fs fs.FS) bool
func CombineRejectByNames(funcs []RejectByNameFunc) SelectByNameFunc {
return func(item string) bool {
@ -35,7 +36,7 @@ func CombineRejectByNames(funcs []RejectByNameFunc) SelectByNameFunc {
}
func CombineRejects(funcs []RejectFunc) SelectFunc {
return func(item string, fi os.FileInfo, fs fs.FS) bool {
return func(item string, fi *fs.ExtendedFileInfo, fs fs.FS) bool {
for _, reject := range funcs {
if reject(item, fi, fs) {
return false
@ -104,7 +105,7 @@ func RejectIfPresent(excludeFileSpec string, warnf func(msg string, args ...inte
}
debug.Log("using %q as exclusion tagfile", tf)
rc := newRejectionCache()
return func(filename string, _ os.FileInfo, fs fs.FS) bool {
return func(filename string, _ *fs.ExtendedFileInfo, fs fs.FS) bool {
return isExcludedByFile(filename, tf, tc, rc, fs, warnf)
}, nil
}
@ -186,6 +187,10 @@ type deviceMap map[string]uint64
// newDeviceMap creates a new device map from the list of source paths.
func newDeviceMap(allowedSourcePaths []string, fs fs.FS) (deviceMap, error) {
if runtime.GOOS == "windows" {
return nil, errors.New("Device IDs are not supported on Windows")
}
deviceMap := make(map[string]uint64)
for _, item := range allowedSourcePaths {
@ -199,12 +204,7 @@ func newDeviceMap(allowedSourcePaths []string, fs fs.FS) (deviceMap, error) {
return nil, err
}
id, err := fs.DeviceID(fi)
if err != nil {
return nil, err
}
deviceMap[item] = id
deviceMap[item] = fi.DeviceID
}
if len(deviceMap) == 0 {
@ -254,15 +254,8 @@ func RejectByDevice(samples []string, filesystem fs.FS) (RejectFunc, error) {
}
debug.Log("allowed devices: %v\n", deviceMap)
return func(item string, fi os.FileInfo, fs fs.FS) bool {
id, err := fs.DeviceID(fi)
if err != nil {
// This should never happen because gatherDevices() would have
// errored out earlier. If it still does that's a reason to panic.
panic(err)
}
allowed, err := deviceMap.IsAllowed(fs.Clean(item), id, fs)
return func(item string, fi *fs.ExtendedFileInfo, fs fs.FS) bool {
allowed, err := deviceMap.IsAllowed(fs.Clean(item), fi.DeviceID, fs)
if err != nil {
// this should not happen
panic(fmt.Sprintf("error checking device ID of %v: %v", item, err))
@ -274,7 +267,7 @@ func RejectByDevice(samples []string, filesystem fs.FS) (RejectFunc, error) {
}
// reject everything except directories
if !fi.IsDir() {
if !fi.Mode.IsDir() {
return true
}
@ -290,14 +283,7 @@ func RejectByDevice(samples []string, filesystem fs.FS) (RejectFunc, error) {
return true
}
parentDeviceID, err := fs.DeviceID(parentFI)
if err != nil {
debug.Log("item %v: getting device ID of parent directory: %v", item, err)
// if in doubt, reject
return true
}
parentAllowed, err := deviceMap.IsAllowed(parentDir, parentDeviceID, fs)
parentAllowed, err := deviceMap.IsAllowed(parentDir, parentFI.DeviceID, fs)
if err != nil {
debug.Log("item %v: error checking parent directory: %v", item, err)
// if in doubt, reject
@ -315,13 +301,13 @@ func RejectByDevice(samples []string, filesystem fs.FS) (RejectFunc, error) {
}
func RejectBySize(maxSize int64) (RejectFunc, error) {
return func(item string, fi os.FileInfo, _ fs.FS) bool {
return func(item string, fi *fs.ExtendedFileInfo, _ fs.FS) bool {
// directory will be ignored
if fi.IsDir() {
if fi.Mode.IsDir() {
return false
}
filesize := fi.Size()
filesize := fi.Size
if filesize > maxSize {
debug.Log("file %s is oversize: %d", item, filesize)
return true

2
internal/archiver/exclude_test.go
View file

@ -193,7 +193,7 @@ func TestIsExcludedByFileSize(t *testing.T) {
return err
}
excluded := sizeExclude(p, fi, nil)
excluded := sizeExclude(p, fs.ExtendedStat(fi), nil)
// the log message helps debugging in case the test fails
t.Logf("%q: dir:%t; size:%d; excluded:%v", p, fi.IsDir(), fi.Size(), excluded)
m[p] = !excluded

9
internal/archiver/scanner.go
View file

@ -2,7 +2,6 @@ package archiver
import (
"context"
"os"
"sort"
"github.com/restic/restic/internal/debug"
@ -25,7 +24,7 @@ func NewScanner(filesystem fs.FS) *Scanner {
return &Scanner{
FS: filesystem,
SelectByName: func(_ string) bool { return true },
Select: func(_ string, _ os.FileInfo, _ fs.FS) bool { return true },
Select: func(_ string, _ *fs.ExtendedFileInfo, _ fs.FS) bool { return true },
Error: func(_ string, err error) error { return err },
Result: func(_ string, _ ScanStats) {},
}
@ -119,10 +118,10 @@ func (s *Scanner) scan(ctx context.Context, stats ScanStats, target string) (Sca
}
switch {
case fi.Mode().IsRegular():
case fi.Mode.IsRegular():
stats.Files++
stats.Bytes += uint64(fi.Size())
case fi.Mode().IsDir():
stats.Bytes += uint64(fi.Size)
case fi.Mode.IsDir():
names, err := fs.Readdirnames(s.FS, target, fs.O_NOFOLLOW)
if err != nil {
return stats, s.Error(target, err)

4
internal/archiver/scanner_test.go
View file

@ -56,8 +56,8 @@ func TestScanner(t *testing.T) {
},
},
},
selFn: func(item string, fi os.FileInfo, fs fs.FS) bool {
if fi.IsDir() {
selFn: func(item string, fi *fs.ExtendedFileInfo, fs fs.FS) bool {
if fi.Mode.IsDir() {
return true
}

31
internal/fs/deviceid_unix.go
View file

@ -1,31 +0,0 @@
//go:build !windows
// +build !windows
package fs
import (
"os"
"syscall"
"github.com/restic/restic/internal/errors"
)
// deviceID extracts the device ID from an os.FileInfo object by casting it
// to syscall.Stat_t
func deviceID(fi os.FileInfo) (deviceID uint64, err error) {
if fi == nil {
return 0, errors.New("unable to determine device: fi is nil")
}
if fi.Sys() == nil {
return 0, errors.New("unable to determine device: fi.Sys() is nil")
}
if st, ok := fi.Sys().(*syscall.Stat_t); ok {
// st.Dev is uint32 on Darwin and uint64 on Linux. Just cast
// everything to uint64.
return uint64(st.Dev), nil
}
return 0, errors.New("Could not cast to syscall.Stat_t")
}

16
internal/fs/deviceid_windows.go
View file

@ -1,16 +0,0 @@
//go:build windows
// +build windows
package fs
import (
"os"
"github.com/restic/restic/internal/errors"
)
// deviceID extracts the device ID from an os.FileInfo object by casting it
// to syscall.Stat_t
func deviceID(_ os.FileInfo) (deviceID uint64, err error) {
return 0, errors.New("Device IDs are not supported on Windows")
}

36
internal/fs/fs_local.go
View file

@ -36,19 +36,12 @@ func (fs Local) OpenFile(name string, flag int, metadataOnly bool) (File, error)
// If the file is a symbolic link, the returned FileInfo
// describes the symbolic link. Lstat makes no attempt to follow the link.
// If there is an error, it will be of type *PathError.
func (fs Local) Lstat(name string) (os.FileInfo, error) {
return os.Lstat(fixpath(name))
}
// DeviceID extracts the DeviceID from the given FileInfo. If the fs does
// not support a DeviceID, it returns an error instead
func (fs Local) DeviceID(fi os.FileInfo) (id uint64, err error) {
return deviceID(fi)
}
// ExtendedStat converts the give FileInfo into ExtendedFileInfo.
func (fs Local) ExtendedStat(fi os.FileInfo) ExtendedFileInfo {
return ExtendedStat(fi)
func (fs Local) Lstat(name string) (*ExtendedFileInfo, error) {
fi, err := os.Lstat(fixpath(name))
if err != nil {
return nil, err
}
return extendedStat(fi), nil
}
// Join joins any number of path elements into a single path, adding a
@ -96,7 +89,7 @@ type localFile struct {
name string
flag int
f *os.File
fi os.FileInfo
fi *ExtendedFileInfo
}
// See the File interface for a description of each method
@ -137,18 +130,23 @@ func (f *localFile) cacheFI() error {
if f.fi != nil {
return nil
}
var fi os.FileInfo
var err error
if f.f != nil {
f.fi, err = f.f.Stat()
fi, err = f.f.Stat()
} else if f.flag&O_NOFOLLOW != 0 {
f.fi, err = os.Lstat(f.name)
fi, err = os.Lstat(f.name)
} else {
f.fi, err = os.Stat(f.name)
fi, err = os.Stat(f.name)
}
return err
if err != nil {
return err
}
f.fi = extendedStat(fi)
return nil
}
func (f *localFile) Stat() (os.FileInfo, error) {
func (f *localFile) Stat() (*ExtendedFileInfo, error) {
err := f.cacheFI()
// the call to cacheFI MUST happen before reading from f.fi
return f.fi, err

15
internal/fs/fs_local_test.go
View file

@ -90,17 +90,16 @@ func checkMetadata(t *testing.T, f File, path string, follow bool, nodeType rest
rtest.OK(t, err)
// ModTime is likely unique per file, thus it provides a good indication that it is from the correct file
rtest.Equals(t, fi.ModTime(), node.ModTime, "node ModTime")
rtest.Equals(t, fi.ModTime, node.ModTime, "node ModTime")
rtest.Equals(t, nodeType, node.Type, "node Type")
}
func assertFIEqual(t *testing.T, want os.FileInfo, got os.FileInfo) {
func assertFIEqual(t *testing.T, want os.FileInfo, got *ExtendedFileInfo) {
t.Helper()
rtest.Equals(t, want.Name(), got.Name(), "Name")
rtest.Equals(t, want.IsDir(), got.IsDir(), "IsDir")
rtest.Equals(t, want.ModTime(), got.ModTime(), "ModTime")
rtest.Equals(t, want.Mode(), got.Mode(), "Mode")
rtest.Equals(t, want.Size(), got.Size(), "Size")
rtest.Equals(t, want.Name(), got.Name, "Name")
rtest.Equals(t, want.ModTime(), got.ModTime, "ModTime")
rtest.Equals(t, want.Mode(), got.Mode, "Mode")
rtest.Equals(t, want.Size(), got.Size, "Size")
}
func TestFSLocalRead(t *testing.T) {
@ -206,7 +205,7 @@ func TestFSLocalTypeChange(t *testing.T) {
fi, err := f.Stat()
rtest.OK(t, err)
if !fi.IsDir() {
if !fi.Mode.IsDir() {
// a file handle based implementation should still reference the file
checkMetadata(t, f, pathNew, false, restic.NodeTypeFile)

3
internal/fs/fs_local_vss.go
View file

@ -1,7 +1,6 @@
package fs
import (
"os"
"path/filepath"
"runtime"
"strings"
@ -131,7 +130,7 @@ func (fs *LocalVss) OpenFile(name string, flag int, metadataOnly bool) (File, er
}
// Lstat wraps the Lstat method of the underlying file system.
func (fs *LocalVss) Lstat(name string) (os.FileInfo, error) {
func (fs *LocalVss) Lstat(name string) (*ExtendedFileInfo, error) {
return fs.FS.Lstat(fs.snapshotPath(name))
}

4
internal/fs/fs_local_vss_test.go
View file

@ -325,7 +325,7 @@ func TestVSSFS(t *testing.T) {
lstatFi, err := localVss.Lstat(tempfile)
rtest.OK(t, err)
rtest.Equals(t, origFi.Mode(), lstatFi.Mode())
rtest.Equals(t, origFi.Mode, lstatFi.Mode)
f, err := localVss.OpenFile(tempfile, os.O_RDONLY, false)
rtest.OK(t, err)
@ -335,7 +335,7 @@ func TestVSSFS(t *testing.T) {
node, err := f.ToNode(false)
rtest.OK(t, err)
rtest.Equals(t, node.Mode, lstatFi.Mode())
rtest.Equals(t, node.Mode, lstatFi.Mode)
rtest.OK(t, f.Close())
}

95
internal/fs/fs_reader.go
View file

@ -5,6 +5,7 @@ import (
"io"
"os"
"path"
"slices"
"sync"
"syscall"
"time"
@ -40,12 +41,12 @@ func (fs *Reader) VolumeName(_ string) string {
return ""
}
func (fs *Reader) fi() os.FileInfo {
return fakeFileInfo{
name: fs.Name,
size: fs.Size,
mode: fs.Mode,
modtime: fs.ModTime,
func (fs *Reader) fi() *ExtendedFileInfo {
return &ExtendedFileInfo{
Name: fs.Name,
Mode: fs.Mode,
ModTime: fs.ModTime,
Size: fs.Size,
}
}
@ -68,7 +69,7 @@ func (fs *Reader) OpenFile(name string, flag int, _ bool) (f File, err error) {
return f, nil
case "/", ".":
f = fakeDir{
entries: []os.FileInfo{fs.fi()},
entries: []string{fs.fi().Name},
}
return f, nil
}
@ -80,15 +81,14 @@ func (fs *Reader) OpenFile(name string, flag int, _ bool) (f File, err error) {
// If the file is a symbolic link, the returned FileInfo
// describes the symbolic link. Lstat makes no attempt to follow the link.
// If there is an error, it will be of type *os.PathError.
func (fs *Reader) Lstat(name string) (os.FileInfo, error) {
getDirInfo := func(name string) os.FileInfo {
fi := fakeFileInfo{
name: fs.Base(name),
size: 0,
mode: os.ModeDir | 0755,
modtime: time.Now(),
func (fs *Reader) Lstat(name string) (*ExtendedFileInfo, error) {
getDirInfo := func(name string) *ExtendedFileInfo {
return &ExtendedFileInfo{
Name: fs.Base(name),
Size: 0,
Mode: os.ModeDir | 0755,
ModTime: time.Now(),
}
return fi
}
switch name {
@ -112,16 +112,6 @@ func (fs *Reader) Lstat(name string) (os.FileInfo, error) {
return nil, pathError("lstat", name, os.ErrNotExist)
}
func (fs *Reader) DeviceID(_ os.FileInfo) (deviceID uint64, err error) {
return 0, errors.New("Device IDs are not supported")
}
func (fs *Reader) ExtendedStat(fi os.FileInfo) ExtendedFileInfo {
return ExtendedFileInfo{
FileInfo: fi,
}
}
// Join joins any number of path elements into a single path, adding a
// Separator if necessary. Join calls Clean on the result; in particular, all
// empty strings are ignored. On Windows, the result is a UNC path if and only
@ -165,13 +155,13 @@ func (fs *Reader) Dir(p string) string {
return path.Dir(p)
}
func newReaderFile(rd io.ReadCloser, fi os.FileInfo, allowEmptyFile bool) *readerFile {
func newReaderFile(rd io.ReadCloser, fi *ExtendedFileInfo, allowEmptyFile bool) *readerFile {
return &readerFile{
ReadCloser: rd,
AllowEmptyFile: allowEmptyFile,
fakeFile: fakeFile{
FileInfo: fi,
name: fi.Name(),
fi: fi,
name: fi.Name,
},
}
}
@ -213,7 +203,7 @@ var _ File = &readerFile{}
// except Stat()
type fakeFile struct {
name string
os.FileInfo
fi *ExtendedFileInfo
}
// ensure that fakeFile implements File
@ -235,12 +225,12 @@ func (f fakeFile) Close() error {
return nil
}
func (f fakeFile) Stat() (os.FileInfo, error) {
return f.FileInfo, nil
func (f fakeFile) Stat() (*ExtendedFileInfo, error) {
return f.fi, nil
}
func (f fakeFile) ToNode(_ bool) (*restic.Node, error) {
node := buildBasicNode(f.name, f.FileInfo)
node := buildBasicNode(f.name, f.fi)
// fill minimal info with current values for uid, gid
node.UID = uint32(os.Getuid())
@ -252,7 +242,7 @@ func (f fakeFile) ToNode(_ bool) (*restic.Node, error) {
// fakeDir implements Readdirnames and Readdir, everything else is delegated to fakeFile.
type fakeDir struct {
entries []os.FileInfo
entries []string
fakeFile
}
@ -260,44 +250,7 @@ func (d fakeDir) Readdirnames(n int) ([]string, error) {
if n > 0 {
return nil, pathError("readdirnames", d.name, errors.New("not implemented"))
}
names := make([]string, 0, len(d.entries))
for _, entry := range d.entries {
names = append(names, entry.Name())
}
return names, nil
}
// fakeFileInfo implements the bare minimum of os.FileInfo.
type fakeFileInfo struct {
name string
size int64
mode os.FileMode
modtime time.Time
}
func (fi fakeFileInfo) Name() string {
return fi.name
}
func (fi fakeFileInfo) Size() int64 {
return fi.size
}
func (fi fakeFileInfo) Mode() os.FileMode {
return fi.mode
}
func (fi fakeFileInfo) ModTime() time.Time {
return fi.modtime
}
func (fi fakeFileInfo) IsDir() bool {
return fi.mode&os.ModeDir > 0
}
func (fi fakeFileInfo) Sys() interface{} {
return nil
return slices.Clone(d.entries), nil
}
func pathError(op, name string, err error) *os.PathError {

22
internal/fs/fs_reader_test.go
View file

@ -60,25 +60,25 @@ func verifyDirectoryContents(t testing.TB, fs FS, dir string, want []string) {
}
}
func checkFileInfo(t testing.TB, fi os.FileInfo, filename string, modtime time.Time, mode os.FileMode, isdir bool) {
if fi.IsDir() != isdir {
t.Errorf("IsDir returned %t, want %t", fi.IsDir(), isdir)
func checkFileInfo(t testing.TB, fi *ExtendedFileInfo, filename string, modtime time.Time, mode os.FileMode, isdir bool) {
if fi.Mode.IsDir() != isdir {
t.Errorf("IsDir returned %t, want %t", fi.Mode.IsDir(), isdir)
}
if fi.Mode() != mode {
t.Errorf("Mode() returned wrong value, want 0%o, got 0%o", mode, fi.Mode())
if fi.Mode != mode {
t.Errorf("Mode has wrong value, want 0%o, got 0%o", mode, fi.Mode)
}
if !modtime.Equal(time.Time{}) && !fi.ModTime().Equal(modtime) {
t.Errorf("ModTime() returned wrong value, want %v, got %v", modtime, fi.ModTime())
if !modtime.Equal(time.Time{}) && !fi.ModTime.Equal(modtime) {
t.Errorf("ModTime has wrong value, want %v, got %v", modtime, fi.ModTime)
}
if path.Base(fi.Name()) != fi.Name() {
t.Errorf("Name() returned is not base, want %q, got %q", path.Base(fi.Name()), fi.Name())
if path.Base(fi.Name) != fi.Name {
t.Errorf("Name is not base, want %q, got %q", path.Base(fi.Name), fi.Name)
}
if fi.Name() != path.Base(filename) {
t.Errorf("Name() returned wrong value, want %q, got %q", path.Base(filename), fi.Name())
if fi.Name != path.Base(filename) {
t.Errorf("Name has wrong value, want %q, got %q", path.Base(filename), fi.Name)
}
}

7
internal/fs/interface.go
View file

@ -2,7 +2,6 @@ package fs
import (
"io"
"os"
"github.com/restic/restic/internal/restic"
)
@ -18,9 +17,7 @@ type FS interface {
//
// Only the O_NOFOLLOW and O_DIRECTORY flags are supported.
OpenFile(name string, flag int, metadataOnly bool) (File, error)
Lstat(name string) (os.FileInfo, error)
DeviceID(fi os.FileInfo) (deviceID uint64, err error)
ExtendedStat(fi os.FileInfo) ExtendedFileInfo
Lstat(name string) (*ExtendedFileInfo, error)
Join(elem ...string) string
Separator() string
@ -47,7 +44,7 @@ type File interface {
io.Closer
Readdirnames(n int) ([]string, error)
Stat() (os.FileInfo, error)
Stat() (*ExtendedFileInfo, error)
// ToNode returns a restic.Node for the File. The internally used os.FileInfo
// must be consistent with that returned by Stat(). In particular, the metadata
// returned by consecutive calls to Stat() and ToNode() must match.

23
internal/fs/node.go
View file

@ -15,37 +15,36 @@ import (
// nodeFromFileInfo returns a new node from the given path and FileInfo. It
// returns the first error that is encountered, together with a node.
func nodeFromFileInfo(path string, fi os.FileInfo, ignoreXattrListError bool) (*restic.Node, error) {
func nodeFromFileInfo(path string, fi *ExtendedFileInfo, ignoreXattrListError bool) (*restic.Node, error) {
node := buildBasicNode(path, fi)
stat := ExtendedStat(fi)
if err := nodeFillExtendedStat(node, path, &stat); err != nil {
if err := nodeFillExtendedStat(node, path, fi); err != nil {
return node, err
}
err := nodeFillGenericAttributes(node, path, &stat)
err := nodeFillGenericAttributes(node, path, fi)
err = errors.Join(err, nodeFillExtendedAttributes(node, path, ignoreXattrListError))
return node, err
}
func buildBasicNode(path string, fi os.FileInfo) *restic.Node {
func buildBasicNode(path string, fi *ExtendedFileInfo) *restic.Node {
mask := os.ModePerm | os.ModeType | os.ModeSetuid | os.ModeSetgid | os.ModeSticky
node := &restic.Node{
Path: path,
Name: fi.Name(),
Mode: fi.Mode() & mask,
ModTime: fi.ModTime(),
Name: fi.Name,
Mode: fi.Mode & mask,
ModTime: fi.ModTime,
}
node.Type = nodeTypeFromFileInfo(fi)
node.Type = nodeTypeFromFileInfo(fi.Mode)
if node.Type == restic.NodeTypeFile {
node.Size = uint64(fi.Size())
node.Size = uint64(fi.Size)
}
return node
}
func nodeTypeFromFileInfo(fi os.FileInfo) restic.NodeType {
switch fi.Mode() & os.ModeType {
func nodeTypeFromFileInfo(mode os.FileMode) restic.NodeType {
switch mode & os.ModeType {
case 0:
return restic.NodeTypeFile
case os.ModeDir:

2
internal/fs/node_windows.go
View file

@ -361,7 +361,7 @@ func nodeFillGenericAttributes(node *restic.Node, path string, stat *ExtendedFil
}
}
winFI := stat.Sys().(*syscall.Win32FileAttributeData)
winFI := stat.sys.(*syscall.Win32FileAttributeData)
// Add Windows attributes
node.GenericAttributes, err = restic.WindowsAttrsToGenericAttributes(restic.WindowsAttributes{

8
internal/fs/stat.go
View file

@ -8,7 +8,8 @@ import (
// ExtendedFileInfo is an extended stat_t, filled with attributes that are
// supported by most operating systems. The original FileInfo is embedded.
type ExtendedFileInfo struct {
os.FileInfo
Name string
Mode os.FileMode
DeviceID uint64 // ID of device containing the file
Inode uint64 // Inode number
@ -23,10 +24,13 @@ type ExtendedFileInfo struct {
AccessTime time.Time // last access time stamp
ModTime time.Time // last (content) modification time stamp
ChangeTime time.Time // last status change time stamp
// nolint:unused // only used on Windows
sys any // Value returned by os.FileInfo.Sys()
}
// ExtendedStat returns an ExtendedFileInfo constructed from the os.FileInfo.
func ExtendedStat(fi os.FileInfo) ExtendedFileInfo {
func ExtendedStat(fi os.FileInfo) *ExtendedFileInfo {
if fi == nil {
panic("os.FileInfo is nil")
}

10
internal/fs/stat_bsd.go
View file

@ -10,11 +10,13 @@ import (
)
// extendedStat extracts info into an ExtendedFileInfo for unix based operating systems.
func extendedStat(fi os.FileInfo) ExtendedFileInfo {
func extendedStat(fi os.FileInfo) *ExtendedFileInfo {
s := fi.Sys().(*syscall.Stat_t)
extFI := ExtendedFileInfo{
FileInfo: fi,
return &ExtendedFileInfo{
Name: fi.Name(),
Mode: fi.Mode(),
DeviceID: uint64(s.Dev),
Inode: uint64(s.Ino),
Links: uint64(s.Nlink),
@ -29,6 +31,4 @@ func extendedStat(fi os.FileInfo) ExtendedFileInfo {
ModTime: time.Unix(s.Mtimespec.Unix()),
ChangeTime: time.Unix(s.Ctimespec.Unix()),
}
return extFI
}

10
internal/fs/stat_unix.go
View file

@ -10,11 +10,13 @@ import (
)
// extendedStat extracts info into an ExtendedFileInfo for unix based operating systems.
func extendedStat(fi os.FileInfo) ExtendedFileInfo {
func extendedStat(fi os.FileInfo) *ExtendedFileInfo {
s := fi.Sys().(*syscall.Stat_t)
extFI := ExtendedFileInfo{
FileInfo: fi,
return &ExtendedFileInfo{
Name: fi.Name(),
Mode: fi.Mode(),
DeviceID: uint64(s.Dev),
Inode: s.Ino,
Links: uint64(s.Nlink),
@ -29,6 +31,4 @@ func extendedStat(fi os.FileInfo) ExtendedFileInfo {
ModTime: time.Unix(s.Mtim.Unix()),
ChangeTime: time.Unix(s.Ctim.Unix()),
}
return extFI
}

11
internal/fs/stat_windows.go
View file

@ -11,15 +11,18 @@ import (
)
// extendedStat extracts info into an ExtendedFileInfo for Windows.
func extendedStat(fi os.FileInfo) ExtendedFileInfo {
func extendedStat(fi os.FileInfo) *ExtendedFileInfo {
s, ok := fi.Sys().(*syscall.Win32FileAttributeData)
if !ok {
panic(fmt.Sprintf("conversion to syscall.Win32FileAttributeData failed, type is %T", fi.Sys()))
}
extFI := ExtendedFileInfo{
FileInfo: fi,
Size: int64(s.FileSizeLow) | (int64(s.FileSizeHigh) << 32),
Name: fi.Name(),
Mode: fi.Mode(),
Size: int64(s.FileSizeLow) | (int64(s.FileSizeHigh) << 32),
sys: fi.Sys(),
}
atime := syscall.NsecToTimespec(s.LastAccessTime.Nanoseconds())
@ -31,5 +34,5 @@ func extendedStat(fi os.FileInfo) ExtendedFileInfo {
// Windows does not have the concept of a "change time" in the sense Unix uses it, so we're using the LastWriteTime here.
extFI.ChangeTime = extFI.ModTime
return extFI
return &extFI
}