d8a00c365a
Maintain an invariant that any blobovnicza is present either in `opened` or in `active` map. Otherwise, the logic becomes too complicate because it is not obvious when we should close the blobovnicza. Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
134 lines
2.9 KiB
Go
134 lines
2.9 KiB
Go
package blobovniczatree
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import (
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"fmt"
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"path/filepath"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobovnicza"
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"go.uber.org/zap"
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)
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// Open opens blobovnicza tree.
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func (b *Blobovniczas) Open(readOnly bool) error {
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b.readOnly = readOnly
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return nil
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}
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// Init initializes blobovnicza tree.
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//
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// Should be called exactly once.
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func (b *Blobovniczas) Init() error {
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b.log.Debug("initializing Blobovnicza's")
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if b.readOnly {
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b.log.Debug("read-only mode, skip blobovniczas initialization...")
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return nil
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}
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return b.iterateLeaves(func(p string) (bool, error) {
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blz, err := b.openBlobovniczaNoCache(p)
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if err != nil {
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return true, err
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}
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defer blz.Close()
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if err := blz.Init(); err != nil {
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return true, fmt.Errorf("could not initialize blobovnicza structure %s: %w", p, err)
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}
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b.log.Debug("blobovnicza successfully initialized, closing...", zap.String("id", p))
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return false, nil
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})
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}
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// Close implements common.Storage.
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func (b *Blobovniczas) Close() error {
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b.activeMtx.Lock()
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b.lruMtx.Lock()
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for p, v := range b.active {
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if err := v.blz.Close(); err != nil {
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b.log.Debug("could not close active blobovnicza",
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zap.String("path", p),
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zap.String("error", err.Error()),
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)
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}
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b.opened.Remove(p)
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}
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for _, k := range b.opened.Keys() {
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v, _ := b.opened.Get(k)
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blz := v.(*blobovnicza.Blobovnicza)
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if err := blz.Close(); err != nil {
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b.log.Debug("could not close active blobovnicza",
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zap.String("path", k.(string)),
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zap.String("error", err.Error()),
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)
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}
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b.opened.Remove(k)
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}
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b.active = make(map[string]blobovniczaWithIndex)
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b.lruMtx.Unlock()
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b.activeMtx.Unlock()
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return nil
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}
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// opens and returns blobovnicza with path p.
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//
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// If blobovnicza is already opened and cached, instance from cache is returned w/o changes.
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func (b *Blobovniczas) openBlobovnicza(p string) (*blobovnicza.Blobovnicza, error) {
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b.lruMtx.Lock()
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v, ok := b.opened.Get(p)
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b.lruMtx.Unlock()
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if ok {
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// blobovnicza should be opened in cache
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return v.(*blobovnicza.Blobovnicza), nil
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}
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lvlPath := filepath.Dir(p)
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curIndex := u64FromHexString(filepath.Base(p))
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b.activeMtx.RLock()
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defer b.activeMtx.RUnlock()
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active, ok := b.active[lvlPath]
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if ok && active.ind == curIndex {
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return active.blz, nil
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}
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b.lruMtx.Lock()
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defer b.lruMtx.Unlock()
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v, ok = b.opened.Get(p)
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if ok {
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return v.(*blobovnicza.Blobovnicza), nil
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}
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blz, err := b.openBlobovniczaNoCache(p)
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if err != nil {
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return nil, err
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}
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b.opened.Add(p, blz)
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return blz, nil
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}
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func (b *Blobovniczas) openBlobovniczaNoCache(p string) (*blobovnicza.Blobovnicza, error) {
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b.openMtx.Lock()
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defer b.openMtx.Unlock()
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blz := blobovnicza.New(append(b.blzOpts,
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blobovnicza.WithReadOnly(b.readOnly),
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blobovnicza.WithPath(filepath.Join(b.rootPath, p)),
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)...)
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if err := blz.Open(); err != nil {
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return nil, fmt.Errorf("could not open blobovnicza %s: %w", p, err)
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}
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return blz, nil
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}
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