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fix(batch): let a write refuse to replace a locked version

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Add ObjectOptions.RefuseLockedOverwrite. With it set, PutObject (before
the rename) and CompleteMultipartUpload check, under the destination's
write lock, the stored version the write would replace: the version it
addresses, or the null version. DeleteObject checks the stored version
that a delete marker it writes names; in a multi-pool deployment that
version is resolved across pools. A version under retention or legal
hold is refused with ObjectLocked. The check reads the version's own
metadata, whatever the bucket configuration, and returns read errors.

Nothing sets the option yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Feng Ruohang <rh@vonng.com>
This commit is contained in:
Feng Ruohang
2026-11-05 04:14:06 +08:00
parent 9fefb756ad
commit 57c2b0fb76
5 changed files with 87 additions and 0 deletions
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cmd/erasure-multipart.go
+9
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@@ -1687,6 +1687,15 @@ func (er erasureObjects) CompleteMultipartUpload(ctx context.Context, bucket str
defer lk.Unlock(lkctx)
}
if opts.RefuseLockedOverwrite {
getObjectInfo := er.getObjectInfo
if opts.replicaObjectInfo != nil {
getObjectInfo = opts.replicaObjectInfo
}
if err := checkVersionLockedForOverwrite(ctx, bucket, object, fi.VersionID, getObjectInfo, opts.Transition); err != nil {
return oi, toObjectErr(err, bucket, object)
}
}
if !opts.ReplicationRequest && !opts.ReplicaLockReconcile && !opts.DataMovement {
getObjectInfo := er.getObjectInfo
if opts.replicaObjectInfo != nil {