ntfs: compute bi_sector in 512-byte units

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bi_sector counts in 512 byte sectors and not in multiples of the
volume's sector size. Under "normal" circumstances (with 512 byte
sectors in NTFS) the current code works as is; however, when we have
a 4k sector size on the volume the current usage of NTFS_B_TO_SECTOR()
and ntfs_bytes_to_sector() end up converting to the number of 4k
sectors after mount.

Reads work today on 4k volumes as bdev-io.c as performing the shift
correctly inline. With writes, we end up with significant silent disk
corruption on these volumes.

This fixes changes to use the new ntfs_bytes_to_bio_sector() function
everywhere we're performing this calculation (including the existing
read path). For the change in inode.c it removes a dead code block
rather than updating.

Fixes: 4079605199 ("ntfs: update in-memory, on-disk structures and headers")
Assisted-by: Claude:claude-opus-5
Signed-off-by: Dennis Tighe <dennis.tighe@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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This commit is contained in:

Dennis Tighe 2026-08-23 00:13:25 -07:00 • committed by Namjae Jeon

parent 323751a604

commit 6faa235a64

5 changed files with 14 additions and 22 deletions

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2

fs/ntfs/bdev-io.c

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2

fs/ntfs/compress.c

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10

fs/ntfs/inode.c

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12

fs/ntfs/mft.c

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10

fs/ntfs/ntfs.h

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