520 lines
14 KiB
Go
520 lines
14 KiB
Go
// Copyright (C) 2020 Storj Labs, Inc.
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// See LICENSE for copying information.
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package metabase
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import (
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"context"
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"database/sql"
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"errors"
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"time"
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pgxerrcode "github.com/jackc/pgerrcode"
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"github.com/zeebo/errs"
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"storj.io/common/storj"
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"storj.io/storj/private/dbutil/pgutil/pgerrcode"
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)
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var (
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// ErrInvalidRequest is used to indicate invalid requests.
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ErrInvalidRequest = errs.Class("metabase: invalid request")
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// ErrConflict is used to indicate conflict with the request.
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ErrConflict = errs.Class("metabase: conflict")
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)
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// BeginObjectNextVersion contains arguments necessary for starting an object upload.
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type BeginObjectNextVersion struct {
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ObjectStream
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ExpiresAt *time.Time
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ZombieDeletionDeadline *time.Time
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// TODO: should we include encrypted metadata
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// TODO: should we include encryption
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}
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// BeginObjectNextVersion adds a pending object to the database, with automatically assigned version.
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func (db *DB) BeginObjectNextVersion(ctx context.Context, opts BeginObjectNextVersion) (committed Version, err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.ObjectStream.Verify(); err != nil {
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return -1, err
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}
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if opts.Version != NextVersion {
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return -1, ErrInvalidRequest.New("Version should be metabase.NextVersion")
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}
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row := db.db.QueryRow(ctx, `
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INSERT INTO objects (
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project_id, bucket_name, object_key, version, stream_id,
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expires_at, zombie_deletion_deadline
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) VALUES (
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$1, $2, $3,
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coalesce((
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SELECT version + 1
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FROM objects
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WHERE project_id = $1 AND bucket_name = $2 AND object_key = $3
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ORDER BY version DESC
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LIMIT 1
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), 1),
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$4, $5, $6)
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RETURNING version
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.StreamID,
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opts.ExpiresAt, opts.ZombieDeletionDeadline)
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var v int64
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if err := row.Scan(&v); err != nil {
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return -1, Error.New("unable to insert object: %w", err)
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}
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return Version(v), nil
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}
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// BeginObjectExactVersion contains arguments necessary for starting an object upload.
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type BeginObjectExactVersion struct {
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ObjectStream
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ExpiresAt *time.Time
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ZombieDeletionDeadline *time.Time
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// TODO: should we include encrypted metadata
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// TODO: should we include encryption
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}
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// BeginObjectExactVersion adds a pending object to the database, with specific version.
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func (db *DB) BeginObjectExactVersion(ctx context.Context, opts BeginObjectExactVersion) (committed Version, err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.ObjectStream.Verify(); err != nil {
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return -1, err
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}
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if opts.Version == NextVersion {
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return -1, ErrInvalidRequest.New("Version should not be metabase.NextVersion")
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}
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_, err = db.db.ExecContext(ctx, `
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INSERT INTO objects (
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project_id, bucket_name, object_key, version, stream_id,
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expires_at, zombie_deletion_deadline
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) values (
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$1, $2, $3, $4, $5,
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$6, $7
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)
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`,
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opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.Version, opts.StreamID,
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opts.ExpiresAt, opts.ZombieDeletionDeadline)
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if err != nil {
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if code := pgerrcode.FromError(err); code == pgxerrcode.UniqueViolation {
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return -1, ErrConflict.New("object already exists")
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}
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return -1, Error.New("unable to insert object: %w", err)
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}
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return opts.Version, nil
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}
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// BeginSegment contains options to verify, whether a new segment upload can be started.
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type BeginSegment struct {
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ObjectStream
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Position SegmentPosition
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RootPieceID storj.PieceID
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Pieces Pieces
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}
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// BeginSegment verifies, whether a new segment upload can be started.
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func (db *DB) BeginSegment(ctx context.Context, opts BeginSegment) (err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.ObjectStream.Verify(); err != nil {
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return err
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}
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switch {
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case opts.RootPieceID.IsZero():
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return ErrInvalidRequest.New("RootPieceID missing")
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case len(opts.Pieces) == 0:
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return ErrInvalidRequest.New("Pieces missing")
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}
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// TODO: verify opts.Pieces content.
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// NOTE: this isn't strictly necessary, since we can also fail this in CommitSegment.
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// however, we should prevent creating segements for non-partial objects.
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// NOTE: these queries could be combined into one.
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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// Verify that object exists and is partial.
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var value int
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err = tx.QueryRow(ctx, `
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SELECT 1
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FROM objects WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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version = $4 AND
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stream_id = $5 AND
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status = 0
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.Version, opts.StreamID).Scan(&value)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return Error.New("pending object missing")
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}
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return Error.New("unable to query object status: %w", err)
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}
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// Verify that the segment does not exist.
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err = tx.QueryRow(ctx, `
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SELECT 1
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FROM segments WHERE
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stream_id = $1 AND
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position = $2
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`, opts.StreamID, opts.Position).Scan(&value)
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if err != nil && !errors.Is(err, sql.ErrNoRows) {
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return Error.New("unable to query segments: %w", err)
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}
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err = nil // ignore any other err result (explicitly)
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err, committed = tx.Commit(), true
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if err != nil {
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return Error.New("unable to commit tx: %w", err)
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}
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return nil
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}
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// CommitSegment contains all necessary information about the segment.
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type CommitSegment struct {
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ObjectStream
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Position SegmentPosition
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RootPieceID storj.PieceID
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EncryptedKeyNonce []byte
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EncryptedKey []byte
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PlainOffset int64 // offset in the original data stream
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PlainSize int32 // size before encryption
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EncryptedSize int32 // segment size after encryption
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Redundancy storj.RedundancyScheme
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Pieces Pieces
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}
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// CommitSegment commits segment to the database.
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func (db *DB) CommitSegment(ctx context.Context, opts CommitSegment) (err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.ObjectStream.Verify(); err != nil {
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return err
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}
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switch {
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case opts.RootPieceID.IsZero():
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return ErrInvalidRequest.New("RootPieceID missing")
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case len(opts.Pieces) == 0:
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return ErrInvalidRequest.New("Pieces missing")
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case len(opts.EncryptedKey) == 0:
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return ErrInvalidRequest.New("EncryptedKey missing")
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case len(opts.EncryptedKeyNonce) == 0:
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return ErrInvalidRequest.New("EncryptedKeyNonce missing")
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case opts.EncryptedSize <= 0:
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return ErrInvalidRequest.New("EncryptedSize negative or zero")
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case opts.PlainSize <= 0:
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return ErrInvalidRequest.New("PlainSize negative or zero")
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case opts.PlainOffset < 0:
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return ErrInvalidRequest.New("PlainOffset negative")
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case opts.Redundancy.IsZero():
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return ErrInvalidRequest.New("Redundancy zero")
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}
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// TODO: verify opts.Pieces content is non-zero
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// TODO: verify opts.Pieces is compatible with opts.Redundancy
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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// Verify that object exists and is partial.
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var value int
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err = tx.QueryRowContext(ctx, `
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SELECT 1
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FROM objects WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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version = $4 AND
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stream_id = $5 AND
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status = 0
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.Version, opts.StreamID).Scan(&value)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return Error.New("pending object missing")
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}
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return Error.New("unable to query object status: %w", err)
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}
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// Insert into segments.
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_, err = tx.ExecContext(ctx, `
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INSERT INTO segments (
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stream_id, position,
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root_piece_id, encrypted_key_nonce, encrypted_key,
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encrypted_size, plain_offset, plain_size,
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redundancy,
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remote_pieces
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) VALUES (
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$1, $2,
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$3, $4, $5,
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$6, $7, $8,
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$9,
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$10
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)`,
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opts.StreamID, opts.Position,
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opts.RootPieceID, opts.EncryptedKeyNonce, opts.EncryptedKey,
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opts.EncryptedSize, opts.PlainOffset, opts.PlainSize,
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redundancyScheme{&opts.Redundancy},
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opts.Pieces,
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)
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if err != nil {
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if code := pgerrcode.FromError(err); code == pgxerrcode.UniqueViolation {
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return ErrConflict.New("segment already exists")
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}
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return Error.New("unable to insert segment: %w", err)
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}
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err, committed = tx.Commit(), true
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if err != nil {
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return Error.New("unable to commit tx: %w", err)
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}
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return nil
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}
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// CommitInlineSegment contains all necessary information about the segment.
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type CommitInlineSegment struct {
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ObjectStream
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Position SegmentPosition
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RootPieceID storj.PieceID // TODO: do we need this?
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EncryptedKeyNonce []byte
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EncryptedKey []byte
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PlainOffset int64 // offset in the original data stream
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PlainSize int32 // size before encryption
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EncryptedSize int32 // segment size after encryption
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Redundancy storj.RedundancyScheme // TODO: do we need this?
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InlineData []byte
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}
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// CommitInlineSegment commits inline segment to the database.
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func (db *DB) CommitInlineSegment(ctx context.Context, opts CommitInlineSegment) (err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.ObjectStream.Verify(); err != nil {
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return err
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}
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// TODO: do we have a lower limit for inline data?
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switch {
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case opts.RootPieceID.IsZero():
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return ErrInvalidRequest.New("RootPieceID missing")
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case len(opts.InlineData) == 0:
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return ErrInvalidRequest.New("InlineData missing")
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case len(opts.EncryptedKey) == 0:
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return ErrInvalidRequest.New("EncryptedKey missing")
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case len(opts.EncryptedKeyNonce) == 0:
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return ErrInvalidRequest.New("EncryptedKeyNonce missing")
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case opts.EncryptedSize <= 0:
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return ErrInvalidRequest.New("EncryptedSize negative or zero")
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case opts.PlainSize <= 0:
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return ErrInvalidRequest.New("PlainSize negative or zero")
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case opts.PlainOffset < 0:
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return ErrInvalidRequest.New("PlainOffset negative")
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case opts.Redundancy.IsZero():
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return ErrInvalidRequest.New("Redundancy zero")
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}
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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// Verify that object exists and is partial.
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var value int
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err = tx.QueryRowContext(ctx, `
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SELECT 1
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FROM objects WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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version = $4 AND
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stream_id = $5 AND
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status = 0
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.Version, opts.StreamID).Scan(&value)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return Error.New("pending object missing")
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}
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return Error.New("unable to query object status: %w", err)
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}
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// Insert into segments.
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_, err = tx.ExecContext(ctx, `
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INSERT INTO segments (
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stream_id, position,
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root_piece_id, encrypted_key_nonce, encrypted_key,
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encrypted_size, plain_offset, plain_size,
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redundancy,
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inline_data
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) VALUES (
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$1, $2,
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$3, $4, $5,
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$6, $7, $8,
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$9,
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$10
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)`,
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opts.StreamID, opts.Position,
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opts.RootPieceID, opts.EncryptedKeyNonce, opts.EncryptedKey,
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opts.EncryptedSize, opts.PlainOffset, opts.PlainSize,
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redundancyScheme{&opts.Redundancy},
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opts.InlineData,
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)
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if err != nil {
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if code := pgerrcode.FromError(err); code == pgxerrcode.UniqueViolation {
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return ErrConflict.New("segment already exists")
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}
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return Error.New("unable to insert segment: %w", err)
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}
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err, committed = tx.Commit(), true
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if err != nil {
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return Error.New("unable to commit tx: %w", err)
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}
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return nil
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}
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// CommitObject contains arguments necessary for committing an object.
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type CommitObject struct {
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ObjectStream
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Encryption storj.EncryptionParameters
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// TODO: proof
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Proofs []SegmentProof
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}
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// SegmentProof ensures that segments cannot be tampered with.
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type SegmentProof struct{}
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// CommitObject adds a pending object to the database.
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func (db *DB) CommitObject(ctx context.Context, opts CommitObject) (err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.ObjectStream.Verify(); err != nil {
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return err
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}
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if opts.Encryption.IsZero() {
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return ErrInvalidRequest.New("encryption is zero")
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}
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// TODO: deduplicate basic checks.
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switch {
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case len(opts.Proofs) > 0:
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return db.commitObjectWithProofs(ctx, opts)
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default:
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return db.commitObjectWithoutProofs(ctx, opts)
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}
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}
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func (db *DB) commitObjectWithoutProofs(ctx context.Context, opts CommitObject) (err error) {
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defer mon.Task()(&ctx)(&err)
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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// TODO: fetch info from segments
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result, err := tx.ExecContext(ctx, `
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UPDATE objects SET
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status = 1, -- committed
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encryption = $6,
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segment_count = 0, -- TODO
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total_encrypted_size = 0, -- TODO
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fixed_segment_size = 0, -- TODO
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zombie_deletion_deadline = NULL
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WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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version = $4 AND
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stream_id = $5 AND
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status = 0;
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.Version, opts.StreamID,
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encryptionParameters{&opts.Encryption},
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)
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if err != nil {
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return Error.New("failed to update object: %w", err)
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}
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rowsAffected, err := result.RowsAffected()
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if err != nil {
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return Error.New("failed to get rows affected: %w", err)
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}
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if rowsAffected == 0 {
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return Error.New("object with specified version and pending status is missing")
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}
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// TODO: delete segments
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err = tx.Commit()
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committed = true
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return Error.Wrap(err)
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}
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func (db *DB) commitObjectWithProofs(ctx context.Context, opts CommitObject) (err error) {
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defer mon.Task()(&ctx)(&err)
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return Error.New("unimplemented")
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}
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