176e8d35ce
Like stargz and nydus remote snapshotter, some snapshots lables are introduced and passed to snapshotter from containerd automatically. The label keys' length are all longer than 10. The limitation of 10 characters makes it harder to debug what label is not appropriate. So we'd better to print more of the wrong label. Signed-off-by: Changwei Ge <gechangwei@bytedance.com>
42 lines
1.1 KiB
Go
42 lines
1.1 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 labels
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import (
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"fmt"
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"github.com/containerd/containerd/errdefs"
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)
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const (
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maxSize = 4096
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// maximum length of key portion of error message if len of key + len of value > maxSize
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keyMaxLen = 64
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)
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// Validate a label's key and value are under 4096 bytes
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func Validate(k, v string) error {
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total := len(k) + len(v)
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if total > maxSize {
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if len(k) > keyMaxLen {
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k = k[:keyMaxLen]
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}
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return fmt.Errorf("label key and value length (%d bytes) greater than maximum size (%d bytes), key: %s: %w", total, maxSize, k, errdefs.ErrInvalidArgument)
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}
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return nil
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}
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