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services/rootfs: return grpc code on existence 

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2017-03-16 14:16:29 -07:00
parent bb3fbded9c
commit 0b65031e90
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1 changed files with 2 additions and 1 deletions
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3
services/rootfs/service.go
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@ -15,6 +15,7 @@ import (
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
)
func init() {
@ -67,7 +68,7 @@ func (s *Service) Unpack(ctx context.Context, pr *rootfsapi.UnpackRequest) (*roo
func (s *Service) Prepare(ctx context.Context, ir *rootfsapi.PrepareRequest) (*rootfsapi.MountResponse, error) {
mounts, err := rootfs.InitRootFS(ctx, ir.Name, ir.ChainID, ir.Readonly, s.snapshotter, mounter{})
if err != nil {
return nil, err
return nil, grpc.Errorf(codes.AlreadyExists, "%v", err)
}
return &rootfsapi.MountResponse{
Mounts: apiMounts(mounts),