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builder-next: update mount signature 

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2019-08-21 16:40:56 -07:00
parent 52ed97c5c1
commit d495eeb365
1 changed files with 26 additions and 27 deletions
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53
builder/builder-next/adapters/snapshot/snapshot.go
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@ -255,24 +255,23 @@ func (s *snapshotter) Mounts(ctx context.Context, key string) (snapshot.Mountabl
var rwlayer layer.RWLayer
return &mountable{
idmap: s.opt.IdentityMapping,
acquire: func() ([]mount.Mount, error) {
acquire: func() ([]mount.Mount, func() error, error) {
rwlayer, err = s.opt.LayerStore.CreateRWLayer(id, l.ChainID(), nil)
if err != nil {
return nil, err
return nil, nil, err
}
rootfs, err := rwlayer.Mount("")
if err != nil {
return nil, err
return nil, nil, err
}
return []mount.Mount{{
Source: rootfs.Path(),
Type: "bind",
Options: []string{"rbind"},
}}, nil
},
release: func() error {
_, err := s.opt.LayerStore.ReleaseRWLayer(rwlayer)
return err
Source: rootfs.Path(),
Type: "bind",
Options: []string{"rbind"},
}}, func() error {
_, err := s.opt.LayerStore.ReleaseRWLayer(rwlayer)
return err
}, nil
},
}, nil
}
@ -281,19 +280,18 @@ func (s *snapshotter) Mounts(ctx context.Context, key string) (snapshot.Mountabl
return &mountable{
idmap: s.opt.IdentityMapping,
acquire: func() ([]mount.Mount, error) {
acquire: func() ([]mount.Mount, func() error, error) {
rootfs, err := s.opt.GraphDriver.Get(id, "")
if err != nil {
return nil, err
return nil, nil, err
}
return []mount.Mount{{
Source: rootfs.Path(),
Type: "bind",
Options: []string{"rbind"},
}}, nil
},
release: func() error {
return s.opt.GraphDriver.Put(id)
Source: rootfs.Path(),
Type: "bind",
Options: []string{"rbind"},
}}, func() error {
return s.opt.GraphDriver.Put(id)
}, nil
},
}, nil
}
@ -440,32 +438,33 @@ func (s *snapshotter) Close() error {
type mountable struct {
mu sync.Mutex
mounts []mount.Mount
acquire func() ([]mount.Mount, error)
acquire func() ([]mount.Mount, func() error, error)
release func() error
refCount int
idmap *idtools.IdentityMapping
}
func (m *mountable) Mount() ([]mount.Mount, error) {
func (m *mountable) Mount() ([]mount.Mount, func() error, error) {
m.mu.Lock()
defer m.mu.Unlock()
if m.mounts != nil {
m.refCount++
return m.mounts, nil
return m.mounts, m.releaseMount, nil
}
mounts, err := m.acquire()
mounts, release, err := m.acquire()
if err != nil {
return nil, err
return nil, nil, err
}
m.mounts = mounts
m.release = release
m.refCount = 1
return m.mounts, nil
return m.mounts, m.releaseMount, nil
}
func (m *mountable) Release() error {
func (m *mountable) releaseMount() error {
m.mu.Lock()
defer m.mu.Unlock()