27 lines
831 B
Markdown
27 lines
831 B
Markdown
# Test Case: Metabox shared xattr with nonzero base
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**Test ID**: TC134-metabox-shared-nonzero-base
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**Fixture**: `metabox-plain.erofs`
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## Objective
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Verify that metabox shared IDs are relative to the nonzero
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`xattr_blkaddr << blkszbits`. Require manifest fields `xattr_blkaddr=1`,
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carrier xattr base 4096, shared record IDs/offsets, and bit-63 inode NIDs.
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## Manual steps
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```sh
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getextattr -qq -x user metaboxshared /mnt/repo22-g4/metabox-a
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getextattr -qq -x user metaboxshared /mnt/repo22-g4/metabox-b
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sha256 -q /mnt/repo22-g4/metabox-a /mnt/repo22-g4/metabox-b
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stat -f 'inode=%i size=%z' /mnt/repo22-g4/metabox-a \
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/mnt/repo22-g4/metabox-b
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```
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## Expected results
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Both values are `nonzero-base`; data hashes match source and inode numbers
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retain bit 63. A read from logical offset `shared_id * 4` must not occur.
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Clean up.
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