5ad6f34329
Before snapshotter per runtime, CRI only supports a global snapshotter. So a snapshot can be uniquely identified by `snapshot_key`. With snapshotter per runtime enabled, there may be multiple snapshotters used by CRI. So only (snapshotter_id, snapshot_key) can uniquely identify a snapshot. Also extends CRI/store/snapshot/Store to support multiple snapshotters. Signed-off-by: Jiang Liu <gerry@linux.alibaba.com>
94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package snapshot
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import (
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"sync"
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"github.com/containerd/containerd/errdefs"
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snapshot "github.com/containerd/containerd/snapshots"
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)
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type Key struct {
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// Key is the key of the snapshot
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Key string
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// Snapshotter is the name of the snapshotter managing the snapshot
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Snapshotter string
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}
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// Snapshot contains the information about the snapshot.
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type Snapshot struct {
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// Key is the key of the snapshot
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Key Key
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// Kind is the kind of the snapshot (active, committed, view)
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Kind snapshot.Kind
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// Size is the size of the snapshot in bytes.
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Size uint64
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// Inodes is the number of inodes used by the snapshot
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Inodes uint64
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// Timestamp is latest update time (in nanoseconds) of the snapshot
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// information.
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Timestamp int64
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}
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// Store stores all snapshots.
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type Store struct {
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lock sync.RWMutex
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snapshots map[Key]Snapshot
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}
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// NewStore creates a snapshot store.
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func NewStore() *Store {
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return &Store{snapshots: make(map[Key]Snapshot)}
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}
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// Add a snapshot into the store.
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func (s *Store) Add(snapshot Snapshot) {
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s.lock.Lock()
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defer s.lock.Unlock()
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s.snapshots[snapshot.Key] = snapshot
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}
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// Get returns the snapshot with specified key. Returns errdefs.ErrNotFound if the
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// snapshot doesn't exist.
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func (s *Store) Get(key Key) (Snapshot, error) {
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s.lock.RLock()
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defer s.lock.RUnlock()
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if sn, ok := s.snapshots[key]; ok {
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return sn, nil
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}
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return Snapshot{}, errdefs.ErrNotFound
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}
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// List lists all snapshots.
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func (s *Store) List() []Snapshot {
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s.lock.RLock()
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defer s.lock.RUnlock()
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var snapshots []Snapshot
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for _, sn := range s.snapshots {
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snapshots = append(snapshots, sn)
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}
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return snapshots
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}
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// Delete deletes the snapshot with specified key.
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func (s *Store) Delete(key Key) {
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s.lock.Lock()
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defer s.lock.Unlock()
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delete(s.snapshots, key)
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}
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