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xl-meta: Add inline data bitrot check (#19240)

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When using `-data` also perform a bitrot check on the data.

Example:

```
λ xl-meta -data net.zip
{
        "minio-1.com:9000/data/minio1/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-1.com:9000/data/minio2/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-1.com:9000/data/minio3/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-1.com:9000/data/minio4/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-2.com:9000/data/minio1/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-2.com:9000/data/minio2/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-2.com:9000/data/minio3/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-2.com:9000/data/minio4/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-3.com:9000/data/minio1/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-3.com:9000/data/minio2/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-3.com:9000/data/minio3/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-3.com:9000/data/minio4/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-4.com:9000/data/minio1/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-4.com:9000/data/minio2/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-4.com:9000/data/minio3/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}},
        "minio-4.com:9000/data/minio4/p40/44b6/44b612e9a7294856bd2b5fe6f6cdeb0d.pdf/xl.meta": {"null":{"bitrot_valid":true,"bytes":11710}}
}
```
This commit is contained in:
Klaus Post 2024-03-11 18:57:11 +01:00 committed by GitHub
parent 6c964fede5
commit a2f6252b2f
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 18 additions and 2 deletions
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20
docs/debugging/xl-meta/main.go
View file

@ -37,6 +37,7 @@ import (
"github.com/klauspost/filepathx"
"github.com/klauspost/reedsolomon"
"github.com/minio/cli"
"github.com/minio/highwayhash"
"github.com/tinylib/msgp/msgp"
)
@ -451,7 +452,6 @@ func (x xlMetaInlineData) json() ([]byte, error) {
if !x.versionOK() {
return nil, errors.New("xlMetaInlineData: unknown version")
}
sz, buf, err := msgp.ReadMapHeaderBytes(x.afterVersion())
if err != nil {
return nil, err
@ -475,7 +475,23 @@ func (x xlMetaInlineData) json() ([]byte, error) {
if i > 0 {
res = append(res, ',')
}
s := fmt.Sprintf(`"%s":%d`, string(key), len(val))
s := fmt.Sprintf(`"%s": {"bytes": %d`, string(key), len(val))
// Check bitrot... We should only ever have one block...
if len(val) >= 32 {
want := val[:32]
data := val[32:]
const magicHighwayHash256Key = "\x4b\xe7\x34\xfa\x8e\x23\x8a\xcd\x26\x3e\x83\xe6\xbb\x96\x85\x52\x04\x0f\x93\x5d\xa3\x9f\x44\x14\x97\xe0\x9d\x13\x22\xde\x36\xa0"
hh, _ := highwayhash.New([]byte(magicHighwayHash256Key))
hh.Write(data)
got := hh.Sum(nil)
if bytes.Equal(want, got) {
s += ", \"bitrot_valid\": true"
} else {
s += ", \"bitrot_valid\": false"
}
s += "}"
}
res = append(res, []byte(s)...)
}
res = append(res, '}')