44 lines
1.7 KiB
Markdown
44 lines
1.7 KiB
Markdown
# Test Case: Large Directory Block Index Width
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**Test ID**: TC153-large-directory-block-index
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**Category**: Directory Corruption
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**Priority**: Critical
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**Latest Result**: PASS on exact 9ae22009f FreeBSD 15 KLD; see the G3 report.
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## Objective
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Verify a valid extended FLAT_PLAIN/Layout0 directory with final block index
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2147483648 enters the 64-bit lookup path and consistently reports sparse
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midpoint corruption as EINTEGRITY.
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## Procedure
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Record final/tc153-sparse-evidence.txt and the sparse-prefix hash. Copy the
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90112-byte prefix, extend the copy sparsely to 8796093091840 bytes, and verify
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the prefix hash remains unchanged:
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cp large-dir-intmax-sparse-prefix.erofs TC153-provider.erofs
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truncate -s 8796093091840 TC153-provider.erofs
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stat -f 'provider_size=%z allocated_sectors=%b' TC153-provider.erofs
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unit=$(mdconfig -a -t vnode -f TC153-provider.erofs)
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diskinfo "/dev/$unit"
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mount -t erofs -o ro "/dev/$unit" /tmp/repo22-g3/mnt
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./g3_vfs_probe stat /tmp/repo22-g3/mnt/huge
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./g3_vfs_probe expect-error stat \
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/tmp/repo22-g3/mnt/huge/missing 97
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./g3_vfs_probe expect-error stat \
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/tmp/repo22-g3/mnt/huge/missing 97
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./readdir_probe /tmp/repo22-g3/mnt 128
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./g3_vfs_probe expect-error stat \
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/tmp/repo22-g3/mnt/huge/missing 97
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Unmount, detach, and remove the sparse copy.
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## Expected Results
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GEOM reports 8796093091840 bytes while host allocation remains sparse.
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The /huge inode reports size 8796093026304 and Layout0 qualification records
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directory_blocks=2147483649, last_block=2147483648. Both cold lookups and the
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post-root-readdir lookup return errno 97, with no ENOENT cache masking, wrap,
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hang, trap, or panic. Record prefix/KLD hashes and complete cleanup.
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