ntfs: punch all-zero compressed blocks

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When a rewritten compression block consists entirely of zeroes,
ntfs_write_cb() returns without replacing its existing runlist mapping.
The old on-disk contents therefore remain visible after cache eviction.

Punch the compression unit so that reads resolve it as a sparse block and
release any clusters that held the previous contents.

Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Namjae Jeon 2026-07-20 17:43:15 +09:00

parent f2b2aeeaad

commit 2bd734ee2c

1 changed files with 6 additions and 4 deletions

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fs/ntfs/compress.c

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