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phaul: use relative path for parent link

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Absolute paths for parent links may not work on restore.
e.g: restore on a different server(during migration).

See https://github.com/checkpoint-restore/criu/blob/criu-2.x-stable/criu/image.c#L432

Signed-off-by: Jacob Wen <jian.w.wen@oracle.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Jacob Wen 2017-11-20 16:03:43 +08:00 • committed by Andrei Vagin
parent 369b56068b
commit 5efcb6028d
1 changed files with 10 additions and 1 deletions
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11
phaul/src/phaul/server.go
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@ -7,6 +7,7 @@ import (
"github.com/golang/protobuf/proto"
"github.com/checkpoint-restore/criu/lib/go/src/criu"
"github.com/checkpoint-restore/criu/lib/go/src/rpc"
"path/filepath"
)
type PhaulServer struct {
@ -54,7 +55,15 @@ func (s *PhaulServer) StartIter() error {
opts.ImagesDirFd = proto.Int32(int32(img_dir.Fd()))
if prev_p != "" {
opts.ParentImg = proto.String(prev_p)
p, err := filepath.Abs(img_dir.Name())
if err != nil {
return err
}
rel, err := filepath.Rel(p, prev_p)
if err != nil {
return err
}
opts.ParentImg = proto.String(rel)
}
pid, _, err := s.cr.StartPageServerChld(opts)