fscrypt: Fully disallow IV_INO_LBLK_32 with s_blocksize != PAGE_SIZE

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FSCRYPT_POLICY_FLAG_IV_INO_LBLK_32 with s_blocksize != PAGE_SIZE works
only with the fs-layer implementation of file contents encryption, not
blk-crypto.  This is a problem for standardizing on blk-crypto.

Fortunately, no one should be using this combination anyway.  It doesn't
make sense because the entire point of IV_INO_LBLK_32 is to support
inline encryption hardware that is limited to 32-bit DUNs.

Thus, fully disallow IV_INO_LBLK_32 with s_blocksize != PAGE_SIZE.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260713023708.9245-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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This commit is contained in:

Eric Biggers 2026-07-12 22:36:55 -04:00

parent 95b39df041

commit b69664873f

3 changed files with 20 additions and 13 deletions

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3

Documentation/filesystems/fscrypt.rst

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13

fs/crypto/inline_crypt.c

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17

fs/crypto/policy.c

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