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backend: Deduplicate sanity checks for parameters of Load() method

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The check is now handled by backend.DefaultLoad. This also guarantees
consistent behavior across all backends.
This commit is contained in:
Michael Eischer 2023-04-07 21:29:01 +02:00
parent bdcafbc11c
commit 8bfc2519d7
9 changed files with 10 additions and 71 deletions
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11
internal/backend/azure/azure.go
View File

@ -300,17 +300,6 @@ func (be *Backend) Load(ctx context.Context, h restic.Handle, length int, offset
func (be *Backend) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v from %v", h, length, offset, be.Filename(h))
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
if length < 0 {
return nil, errors.Errorf("invalid length %d", length)
}
objName := be.Filename(h)
blockBlobClient := be.container.NewBlobClient(objName)

11
internal/backend/b2/b2.go
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@ -207,17 +207,6 @@ func (be *b2Backend) Load(ctx context.Context, h restic.Handle, length int, offs
func (be *b2Backend) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v from %v", h, length, offset, be.Filename(h))
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
if length < 0 {
return nil, errors.Errorf("invalid length %d", length)
}
ctx, cancel := context.WithCancel(ctx)

10
internal/backend/gs/gs.go
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@ -273,17 +273,7 @@ func (be *Backend) Load(ctx context.Context, h restic.Handle, length int, offset
func (be *Backend) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v from %v", h, length, offset, be.Filename(h))
if err := h.Valid(); err != nil {
return nil, err
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
if length < 0 {
return nil, errors.Errorf("invalid length %d", length)
}
if length == 0 {
// negative length indicates read till end to GCS lib
length = -1

7
internal/backend/local/local.go
View File

@ -218,13 +218,6 @@ func (b *Local) Load(ctx context.Context, h restic.Handle, length int, offset in
func (b *Local) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v", h, length, offset)
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
b.sem.GetToken()
f, err := fs.Open(b.Filename(h))

3
internal/backend/mem/mem_backend.go
View File

@ -114,9 +114,6 @@ func (be *MemoryBackend) Load(ctx context.Context, h restic.Handle, length int,
}
func (be *MemoryBackend) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
be.sem.GetToken()
be.m.Lock()

11
internal/backend/s3/s3.go
View File

@ -312,17 +312,6 @@ func (be *Backend) Load(ctx context.Context, h restic.Handle, length int, offset
func (be *Backend) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v from %v", h, length, offset, be.Filename(h))
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
if length < 0 {
return nil, errors.Errorf("invalid length %d", length)
}
objName := be.Filename(h)
opts := minio.GetObjectOptions{}

7
internal/backend/sftp/sftp.go
View File

@ -430,13 +430,6 @@ func (wr *wrapReader) Close() error {
func (r *SFTP) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v", h, length, offset)
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
r.sem.GetToken()
f, err := r.c.Open(r.Filename(h))

11
internal/backend/swift/swift.go
View File

@ -144,17 +144,6 @@ func (be *beSwift) Load(ctx context.Context, h restic.Handle, length int, offset
func (be *beSwift) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
debug.Log("Load %v, length %v, offset %v", h, length, offset)
if err := h.Valid(); err != nil {
return nil, backoff.Permanent(err)
}
if offset < 0 {
return nil, errors.New("offset is negative")
}
if length < 0 {
return nil, errors.Errorf("invalid length %d", length)
}
objName := be.Filename(h)

10
internal/backend/utils.go
View File

@ -6,6 +6,7 @@ import (
"fmt"
"io"
"github.com/cenkalti/backoff/v4"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/restic"
@ -62,6 +63,15 @@ func LimitReadCloser(r io.ReadCloser, n int64) *LimitedReadCloser {
func DefaultLoad(ctx context.Context, h restic.Handle, length int, offset int64,
openReader func(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error),
fn func(rd io.Reader) error) error {
if err := h.Valid(); err != nil {
return backoff.Permanent(err)
}
if offset < 0 {
return errors.New("offset is negative")
}
if length < 0 {
return errors.Errorf("invalid length %d", length)
}
rd, err := openReader(ctx, h, length, offset)
if err != nil {
return err