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package containerd
import (
"context"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/namespaces"
"github.com/containerd/nydus-snapshotter/pkg/errdefs"
digest "github.com/opencontainers/go-digest"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
func NewContentStore(store content.Store, ns string) *Store {
return &Store{ns, store}
}
type Store struct {
ns string
content.Store
}
func (c *Store) Namespace() string {
return c.ns
}
func (c *Store) WithNamespace(ns string) *Store {
return NewContentStore(c.Store, ns)
}
func (c *Store) Info(ctx context.Context, dgst digest.Digest) (content.Info, error) {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.Info(ctx, dgst)
}
func (c *Store) Update(ctx context.Context, info content.Info, fieldpaths ...string) (content.Info, error) {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.Update(ctx, info, fieldpaths...)
}
func (c *Store) Walk(ctx context.Context, fn content.WalkFunc, filters ...string) error {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.Walk(ctx, fn, filters...)
}
func (c *Store) Delete(ctx context.Context, dgst digest.Digest) error {
return errors.Errorf("contentstore.Delete usage is forbidden")
}
func (c *Store) Status(ctx context.Context, ref string) (content.Status, error) {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.Status(ctx, ref)
}
func (c *Store) ListStatuses(ctx context.Context, filters ...string) ([]content.Status, error) {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.ListStatuses(ctx, filters...)
}
func (c *Store) Abort(ctx context.Context, ref string) error {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.Abort(ctx, ref)
}
func (c *Store) ReaderAt(ctx context.Context, desc ocispecs.Descriptor) (content.ReaderAt, error) {
ctx = namespaces.WithNamespace(ctx, c.ns)
return c.Store.ReaderAt(ctx, desc)
}
func (c *Store) Writer(ctx context.Context, opts ...content.WriterOpt) (content.Writer, error) {
return c.writer(ctx, 3, opts...)
}
func (c *Store) WithFallbackNS(ns string) content.Store {
return &nsFallbackStore{
main: c,
fb: c.WithNamespace(ns),
}
}
func (c *Store) writer(ctx context.Context, retries int, opts ...content.WriterOpt) (content.Writer, error) {
ctx = namespaces.WithNamespace(ctx, c.ns)
w, err := c.Store.Writer(ctx, opts...)
if err != nil {
return nil, err
}
return &nsWriter{Writer: w, ns: c.ns}, nil
}
type nsWriter struct {
content.Writer
ns string
}
func (w *nsWriter) Commit(ctx context.Context, size int64, expected digest.Digest, opts ...content.Opt) error {
ctx = namespaces.WithNamespace(ctx, w.ns)
return w.Writer.Commit(ctx, size, expected, opts...)
}
type nsFallbackStore struct {
main *Store
fb *Store
}
var _ content.Store = &nsFallbackStore{}
func (c *nsFallbackStore) Info(ctx context.Context, dgst digest.Digest) (content.Info, error) {
info, err := c.main.Info(ctx, dgst)
if err != nil {
if errdefs.IsNotFound(err) {
return c.fb.Info(ctx, dgst)
}
}
return info, err
}
func (c *nsFallbackStore) Update(ctx context.Context, info content.Info, fieldpaths ...string) (content.Info, error) {
return c.main.Update(ctx, info, fieldpaths...)
}
func (c *nsFallbackStore) Walk(ctx context.Context, fn content.WalkFunc, filters ...string) error {
return c.main.Walk(ctx, fn, filters...)
}
func (c *nsFallbackStore) Delete(ctx context.Context, dgst digest.Digest) error {
return c.main.Delete(ctx, dgst)
}
func (c *nsFallbackStore) Status(ctx context.Context, ref string) (content.Status, error) {
return c.main.Status(ctx, ref)
}
func (c *nsFallbackStore) ListStatuses(ctx context.Context, filters ...string) ([]content.Status, error) {
return c.main.ListStatuses(ctx, filters...)
}
func (c *nsFallbackStore) Abort(ctx context.Context, ref string) error {
return c.main.Abort(ctx, ref)
}
func (c *nsFallbackStore) ReaderAt(ctx context.Context, desc ocispecs.Descriptor) (content.ReaderAt, error) {
ra, err := c.main.ReaderAt(ctx, desc)
if err != nil {
if errdefs.IsNotFound(err) {
return c.fb.ReaderAt(ctx, desc)
}
}
return ra, err
}
func (c *nsFallbackStore) Writer(ctx context.Context, opts ...content.WriterOpt) (content.Writer, error) {
return c.main.Writer(ctx, opts...)
}
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