fscrypt: handle blocksize < PAGE_SIZE in fscrypt_zeroout_range()

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Adjust fscrypt_zeroout_range() to encrypt a block at a time rather than
a page at a time, so that it works when blocksize < PAGE_SIZE.

This isn't optimized for performance, but then again this function
already wasn't optimized for performance.  As a future optimization, we
could submit much larger bios here.

This is in preparation for allowing encryption on ext4 filesystems with
blocksize != PAGE_SIZE.

This is based on work by Chandan Rajendra.

Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>

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Eric Biggers 2019-05-20 09:29:45 -07:00

parent 53bc1d854c

commit 930d453995

1 changed files with 6 additions and 9 deletions

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fs/crypto/bio.c

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