frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree/iterate.go

286 lines
7.4 KiB
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package blobovniczatree
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobovnicza"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"git.frostfs.info/TrueCloudLab/hrw"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"go.uber.org/zap"
)
// Iterate iterates over all objects in b.
func (b *Blobovniczas) Iterate(ctx context.Context, prm common.IteratePrm) (common.IterateRes, error) {
var (
startedAt = time.Now()
err error
)
defer func() {
b.metrics.Iterate(time.Since(startedAt), err == nil)
}()
ctx, span := tracing.StartSpanFromContext(ctx, "Blobovniczas.Iterate",
trace.WithAttributes(
attribute.String("path", b.rootPath),
attribute.Bool("ignore_errors", prm.IgnoreErrors),
))
defer span.End()
err = b.iterateBlobovniczas(ctx, prm.IgnoreErrors, func(p string, blz *blobovnicza.Blobovnicza) error {
var subPrm blobovnicza.IteratePrm
subPrm.SetHandler(func(elem blobovnicza.IterationElement) error {
data, err := b.compression.Decompress(elem.ObjectData())
if err != nil {
if prm.IgnoreErrors {
b.log.Warn(logs.BlobstorErrorOccurredDuringTheIteration,
zap.Stringer("address", elem.Address()),
zap.String("err", err.Error()),
zap.String("storage_id", p),
zap.String("root_path", b.rootPath))
return nil
}
return fmt.Errorf("could not decompress object data: %w", err)
}
if prm.Handler != nil {
return prm.Handler(common.IterationElement{
Address: elem.Address(),
ObjectData: data,
StorageID: []byte(strings.TrimSuffix(p, dbExtension)),
})
}
return nil
})
subPrm.DecodeAddresses()
_, err := blz.Iterate(ctx, subPrm)
return err
})
return common.IterateRes{}, err
}
// iterator over all Blobovniczas in unsorted order. Break on f's error return.
func (b *Blobovniczas) iterateBlobovniczas(ctx context.Context, ignoreErrors bool, f func(string, *blobovnicza.Blobovnicza) error) error {
return b.iterateExistingDBPaths(ctx, func(p string) (bool, error) {
shBlz := b.getBlobovnicza(p)
blz, err := shBlz.Open()
if err != nil {
if ignoreErrors {
b.log.Warn(logs.BlobstorErrorOccurredDuringTheIteration,
zap.String("err", err.Error()),
zap.String("storage_id", p),
zap.String("root_path", b.rootPath))
return false, nil
}
return false, fmt.Errorf("could not open blobovnicza %s: %w", p, err)
}
defer shBlz.Close()
err = f(p, blz)
return err != nil, err
})
}
// iterateSortedLeaves iterates over the paths of Blobovniczas sorted by weight.
//
// Uses depth, width and leaf width for iteration.
func (b *Blobovniczas) iterateSortedLeaves(ctx context.Context, addr *oid.Address, f func(string) (bool, error)) error {
_, err := b.iterateSorted(
ctx,
addr,
make([]string, 0, b.blzShallowDepth),
b.blzShallowDepth,
func(p []string) (bool, error) { return f(filepath.Join(p...)) },
)
return err
}
// iterator over directories with Blobovniczas sorted by weight.
func (b *Blobovniczas) iterateDeepest(ctx context.Context, addr oid.Address, f func(string) (bool, error)) error {
depth := b.blzShallowDepth
if depth > 0 {
depth--
}
_, err := b.iterateSorted(
ctx,
&addr,
make([]string, 0, depth),
depth,
func(p []string) (bool, error) { return f(filepath.Join(p...)) },
)
return err
}
// iterator over particular level of directories.
func (b *Blobovniczas) iterateSorted(ctx context.Context, addr *oid.Address, curPath []string, execDepth uint64, f func([]string) (bool, error)) (bool, error) {
isLeafLevel := uint64(len(curPath)) == b.blzShallowDepth
levelWidth := b.blzShallowWidth
if isLeafLevel {
levelWidth = b.blzLeafWidth
}
indices := indexSlice(levelWidth)
hrw.SortSliceByValue(indices, addressHash(addr, filepath.Join(curPath...)))
exec := uint64(len(curPath)) == execDepth
for i := range indices {
select {
case <-ctx.Done():
return false, ctx.Err()
default:
}
lastPart := u64ToHexString(indices[i])
if isLeafLevel {
lastPart = u64ToHexStringExt(indices[i])
}
if i == 0 {
curPath = append(curPath, lastPart)
} else {
curPath[len(curPath)-1] = lastPart
}
if exec {
if stop, err := f(curPath); err != nil {
return false, err
} else if stop {
return true, nil
}
} else if stop, err := b.iterateSorted(ctx, addr, curPath, execDepth, f); err != nil {
return false, err
} else if stop {
return true, nil
}
}
return false, nil
}
// iterateExistingDBPaths iterates over the paths of Blobovniczas without any order.
//
// Uses existed blobovnicza files for iteration.
func (b *Blobovniczas) iterateExistingDBPaths(ctx context.Context, f func(string) (bool, error)) error {
_, err := b.iterateExistingDBPathsDFS(ctx, "", f)
return err
}
func (b *Blobovniczas) iterateExistingDBPathsDFS(ctx context.Context, path string, f func(string) (bool, error)) (bool, error) {
sysPath := filepath.Join(b.rootPath, path)
entries, err := os.ReadDir(sysPath)
if os.IsNotExist(err) && b.readOnly && path == "" { // non initialized tree in read only mode
return false, nil
}
if err != nil {
return false, err
}
for _, entry := range entries {
select {
case <-ctx.Done():
return false, ctx.Err()
default:
}
if entry.IsDir() {
stop, err := b.iterateExistingDBPathsDFS(ctx, filepath.Join(path, entry.Name()), f)
if err != nil {
return false, err
}
if stop {
return true, nil
}
} else {
stop, err := f(filepath.Join(path, entry.Name()))
if err != nil {
return false, err
}
if stop {
return true, nil
}
}
}
return false, nil
}
func (b *Blobovniczas) iterateSortedDBPaths(ctx context.Context, addr oid.Address, f func(string) (bool, error)) error {
_, err := b.iterateSordedDBPathsInternal(ctx, "", addr, f)
return err
}
func (b *Blobovniczas) iterateSordedDBPathsInternal(ctx context.Context, path string, addr oid.Address, f func(string) (bool, error)) (bool, error) {
sysPath := filepath.Join(b.rootPath, path)
entries, err := os.ReadDir(sysPath)
if os.IsNotExist(err) && b.readOnly && path == "" { // non initialized tree in read only mode
return false, nil
}
if err != nil {
return false, err
}
var dbIdxs []uint64
var dirIdxs []uint64
for _, entry := range entries {
idx := u64FromHexString(entry.Name())
if entry.IsDir() {
dirIdxs = append(dirIdxs, idx)
} else {
dbIdxs = append(dbIdxs, idx)
}
}
if len(dbIdxs) > 0 {
hrw.SortSliceByValue(dbIdxs, addressHash(&addr, path))
for _, dbIdx := range dbIdxs {
dbPath := filepath.Join(path, u64ToHexStringExt(dbIdx))
stop, err := f(dbPath)
if err != nil {
return false, err
}
if stop {
return true, nil
}
}
}
if len(dirIdxs) > 0 {
hrw.SortSliceByValue(dirIdxs, addressHash(&addr, path))
for _, dirIdx := range dirIdxs {
dirPath := filepath.Join(path, u64ToHexString(dirIdx))
stop, err := b.iterateSordedDBPathsInternal(ctx, dirPath, addr, f)
if err != nil {
return false, err
}
if stop {
return true, nil
}
}
}
return false, nil
}
// makes slice of uint64 values from 0 to number-1.
func indexSlice(number uint64) []uint64 {
s := make([]uint64, number)
for i := range s {
s[i] = uint64(i)
}
return s
}