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restic
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replace usages of backend.Remove() with repository.RemoveUnpacked() 

RemoveUnpacked will eventually block removal of all filetypes other than
snapshots. However, getting there requires a major refactor to provide
some components with privileged access.
This commit is contained in:
Michael Eischer 2024-05-10 01:16:23 +02:00
parent 8274f5b101
commit ab9077bc13
10 changed files with 30 additions and 41 deletions
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7
cmd/restic/cmd_rewrite.go
View File

@ -8,7 +8,6 @@ import (
"github.com/spf13/cobra"
"golang.org/x/sync/errgroup"
"github.com/restic/restic/internal/backend"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/repository"
@ -181,8 +180,7 @@ func filterAndReplaceSnapshot(ctx context.Context, repo restic.Repository, sn *r
if dryRun {
Verbosef("would delete empty snapshot\n")
} else {
h := backend.Handle{Type: restic.SnapshotFile, Name: sn.ID().String()}
if err = repo.Backend().Remove(ctx, h); err != nil {
if err = repo.RemoveUnpacked(ctx, restic.SnapshotFile, *sn.ID()); err != nil {
return false, err
}
debug.Log("removed empty snapshot %v", sn.ID())
@ -241,8 +239,7 @@ func filterAndReplaceSnapshot(ctx context.Context, repo restic.Repository, sn *r
Verbosef("saved new snapshot %v\n", id.Str())
if forget {
h := backend.Handle{Type: restic.SnapshotFile, Name: sn.ID().String()}
if err = repo.Backend().Remove(ctx, h); err != nil {
if err = repo.RemoveUnpacked(ctx, restic.SnapshotFile, *sn.ID()); err != nil {
return false, err
}
debug.Log("removed old snapshot %v", sn.ID())

4
cmd/restic/cmd_tag.go
View File

@ -5,7 +5,6 @@ import (
"github.com/spf13/cobra"
"github.com/restic/restic/internal/backend"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/repository"
@ -86,8 +85,7 @@ func changeTags(ctx context.Context, repo *repository.Repository, sn *restic.Sna
debug.Log("new snapshot saved as %v", id)
// Remove the old snapshot.
h := backend.Handle{Type: restic.SnapshotFile, Name: sn.ID().String()}
if err = repo.Backend().Remove(ctx, h); err != nil {
if err = repo.RemoveUnpacked(ctx, restic.SnapshotFile, *sn.ID()); err != nil {
return false, err
}

4
cmd/restic/integration_helpers_test.go
View File

@ -267,7 +267,7 @@ func removePacks(gopts GlobalOptions, t testing.TB, remove restic.IDSet) {
defer unlock()
for id := range remove {
rtest.OK(t, r.Backend().Remove(ctx, backend.Handle{Type: restic.PackFile, Name: id.String()}))
rtest.OK(t, r.RemoveUnpacked(ctx, restic.PackFile, id))
}
}
@ -291,7 +291,7 @@ func removePacksExcept(gopts GlobalOptions, t testing.TB, keep restic.IDSet, rem
if treePacks.Has(id) != removeTreePacks || keep.Has(id) {
return nil
}
return r.Backend().Remove(ctx, backend.Handle{Type: restic.PackFile, Name: id.String()})
return r.RemoveUnpacked(ctx, restic.PackFile, id)
}))
}

23
internal/checker/checker_test.go
View File

@ -94,11 +94,8 @@ func TestMissingPack(t *testing.T) {
repo, cleanup := repository.TestFromFixture(t, checkerTestData)
defer cleanup()
packHandle := backend.Handle{
Type: restic.PackFile,
Name: "657f7fb64f6a854fff6fe9279998ee09034901eded4e6db9bcee0e59745bbce6",
}
test.OK(t, repo.Backend().Remove(context.TODO(), packHandle))
packID := restic.TestParseID("657f7fb64f6a854fff6fe9279998ee09034901eded4e6db9bcee0e59745bbce6")
test.OK(t, repo.RemoveUnpacked(context.TODO(), restic.PackFile, packID))
chkr := checker.New(repo, false)
hints, errs := chkr.LoadIndex(context.TODO(), nil)
@ -113,7 +110,7 @@ func TestMissingPack(t *testing.T) {
"expected exactly one error, got %v", len(errs))
if err, ok := errs[0].(*checker.PackError); ok {
test.Equals(t, packHandle.Name, err.ID.String())
test.Equals(t, packID, err.ID)
} else {
t.Errorf("expected error returned by checker.Packs() to be PackError, got %v", err)
}
@ -125,11 +122,8 @@ func TestUnreferencedPack(t *testing.T) {
// index 3f1a only references pack 60e0
packID := "60e0438dcb978ec6860cc1f8c43da648170ee9129af8f650f876bad19f8f788e"
indexHandle := backend.Handle{
Type: restic.IndexFile,
Name: "3f1abfcb79c6f7d0a3be517d2c83c8562fba64ef2c8e9a3544b4edaf8b5e3b44",
}
test.OK(t, repo.Backend().Remove(context.TODO(), indexHandle))
indexID := restic.TestParseID("3f1abfcb79c6f7d0a3be517d2c83c8562fba64ef2c8e9a3544b4edaf8b5e3b44")
test.OK(t, repo.RemoveUnpacked(context.TODO(), restic.IndexFile, indexID))
chkr := checker.New(repo, false)
hints, errs := chkr.LoadIndex(context.TODO(), nil)
@ -154,11 +148,8 @@ func TestUnreferencedBlobs(t *testing.T) {
repo, cleanup := repository.TestFromFixture(t, checkerTestData)
defer cleanup()
snapshotHandle := backend.Handle{
Type: restic.SnapshotFile,
Name: "51d249d28815200d59e4be7b3f21a157b864dc343353df9d8e498220c2499b02",
}
test.OK(t, repo.Backend().Remove(context.TODO(), snapshotHandle))
snapshotID := restic.TestParseID("51d249d28815200d59e4be7b3f21a157b864dc343353df9d8e498220c2499b02")
test.OK(t, repo.RemoveUnpacked(context.TODO(), restic.SnapshotFile, snapshotID))
unusedBlobsBySnapshot := restic.BlobHandles{
restic.TestParseHandle("58c748bbe2929fdf30c73262bd8313fe828f8925b05d1d4a87fe109082acb849", restic.DataBlob),

2
internal/repository/repack_test.go
View File

@ -167,7 +167,7 @@ func repack(t *testing.T, repo restic.Repository, packs restic.IDSet, blobs rest
}
for id := range repackedBlobs {
err = repo.Backend().Remove(context.TODO(), backend.Handle{Type: restic.PackFile, Name: id.String()})
err = repo.RemoveUnpacked(context.TODO(), restic.PackFile, id)
if err != nil {
t.Fatal(err)
}

5
internal/repository/repository.go
View File

@ -520,6 +520,11 @@ func (r *Repository) verifyUnpacked(buf []byte, t restic.FileType, expected []by
return nil
}
func (r *Repository) RemoveUnpacked(ctx context.Context, t restic.FileType, id restic.ID) error {
// TODO prevent everything except removing snapshots for non-repository code
return r.be.Remove(ctx, backend.Handle{Type: t, Name: id.String()})
}
// Flush saves all remaining packs and the index
func (r *Repository) Flush(ctx context.Context) error {
if err := r.flushPacks(ctx); err != nil {

15
internal/restic/lock.go
View File

@ -12,7 +12,6 @@ import (
"testing"
"time"
"github.com/restic/restic/internal/backend"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/debug"
@ -226,7 +225,7 @@ func (l *Lock) Unlock() error {
return nil
}
return l.repo.Backend().Remove(context.TODO(), backend.Handle{Type: LockFile, Name: l.lockID.String()})
return l.repo.RemoveUnpacked(context.TODO(), LockFile, *l.lockID)
}
var StaleLockTimeout = 30 * time.Minute
@ -286,7 +285,7 @@ func (l *Lock) Refresh(ctx context.Context) error {
oldLockID := l.lockID
l.lockID = &id
return l.repo.Backend().Remove(context.TODO(), backend.Handle{Type: LockFile, Name: oldLockID.String()})
return l.repo.RemoveUnpacked(context.TODO(), LockFile, *oldLockID)
}
// RefreshStaleLock is an extended variant of Refresh that can also refresh stale lock files.
@ -315,13 +314,13 @@ func (l *Lock) RefreshStaleLock(ctx context.Context) error {
exists, err = l.checkExistence(ctx)
if err != nil {
// cleanup replacement lock
_ = l.repo.Backend().Remove(context.TODO(), backend.Handle{Type: LockFile, Name: id.String()})
_ = l.repo.RemoveUnpacked(context.TODO(), LockFile, id)
return err
}
if !exists {
// cleanup replacement lock
_ = l.repo.Backend().Remove(context.TODO(), backend.Handle{Type: LockFile, Name: id.String()})
_ = l.repo.RemoveUnpacked(context.TODO(), LockFile, id)
return ErrRemovedLock
}
@ -332,7 +331,7 @@ func (l *Lock) RefreshStaleLock(ctx context.Context) error {
oldLockID := l.lockID
l.lockID = &id
return l.repo.Backend().Remove(context.TODO(), backend.Handle{Type: LockFile, Name: oldLockID.String()})
return l.repo.RemoveUnpacked(context.TODO(), LockFile, *oldLockID)
}
func (l *Lock) checkExistence(ctx context.Context) (bool, error) {
@ -400,7 +399,7 @@ func RemoveStaleLocks(ctx context.Context, repo Repository) (uint, error) {
}
if lock.Stale() {
err = repo.Backend().Remove(ctx, backend.Handle{Type: LockFile, Name: id.String()})
err = repo.RemoveUnpacked(ctx, LockFile, id)
if err == nil {
processed++
}
@ -416,7 +415,7 @@ func RemoveStaleLocks(ctx context.Context, repo Repository) (uint, error) {
func RemoveAllLocks(ctx context.Context, repo Repository) (uint, error) {
var processed uint32
err := ParallelList(ctx, repo, LockFile, repo.Connections(), func(ctx context.Context, id ID, _ int64) error {
err := repo.Backend().Remove(ctx, backend.Handle{Type: LockFile, Name: id.String()})
err := repo.RemoveUnpacked(ctx, LockFile, id)
if err == nil {
atomic.AddUint32(&processed, 1)
}

5
internal/restic/lock_test.go
View File

@ -131,8 +131,7 @@ func createFakeLock(repo restic.SaverUnpacked, t time.Time, pid int) (restic.ID,
}
func removeLock(repo restic.Repository, id restic.ID) error {
h := backend.Handle{Type: restic.LockFile, Name: id.String()}
return repo.Backend().Remove(context.TODO(), h)
return repo.RemoveUnpacked(context.TODO(), restic.LockFile, id)
}
var staleLockTests = []struct {
@ -318,7 +317,7 @@ func TestLockRefreshStaleMissing(t *testing.T) {
lockID := checkSingleLock(t, repo)
// refresh must fail if lock was removed
rtest.OK(t, repo.Backend().Remove(context.TODO(), backend.Handle{Type: restic.LockFile, Name: lockID.String()}))
rtest.OK(t, repo.RemoveUnpacked(context.TODO(), restic.LockFile, lockID))
time.Sleep(time.Millisecond)
err = lock.RefreshStaleLock(context.TODO())
rtest.Assert(t, err == restic.ErrRemovedLock, "unexpected error, expected %v, got %v", restic.ErrRemovedLock, err)

4
internal/restic/parallel.go
View File

@ -3,7 +3,6 @@ package restic
import (
"context"
"github.com/restic/restic/internal/backend"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/ui/progress"
"golang.org/x/sync/errgroup"
@ -77,8 +76,7 @@ func ParallelRemove(ctx context.Context, repo Repository, fileList IDSet, fileTy
for i := 0; i < int(workerCount); i++ {
wg.Go(func() error {
for id := range fileChan {
h := backend.Handle{Type: fileType, Name: id.String()}
err := repo.Backend().Remove(ctx, h)
err := repo.RemoveUnpacked(ctx, fileType, id)
if report != nil {
err = report(id, err)
}

2
internal/restic/repository.go
View File

@ -57,6 +57,8 @@ type Repository interface {
// LoadUnpacked loads and decrypts the file with the given type and ID.
LoadUnpacked(ctx context.Context, t FileType, id ID) (data []byte, err error)
SaveUnpacked(context.Context, FileType, []byte) (ID, error)
// RemoveUnpacked removes a file from the repository. This will eventually be restricted to deleting only snapshots.
RemoveUnpacked(ctx context.Context, t FileType, id ID) error
// LoadRaw reads all data stored in the backend for the file with id and filetype t.
// If the backend returns data that does not match the id, then the buffer is returned