[PATCH v5 0/2] dm-integrity: Implement asynch digest support

[Harald Freudenberger <freude@linux.ibm.com>]

Support for ahashes in dm-integrity.

Changelog:

v1: First implementation. Tested with crc32, sha256, hmac-sha256 and
    the s390 specific implementations for hmac-sha256 and protected
    key phmac-sha256. Also ran with some instrumented code (in the digest
    implementation) to verify that in fact now the code runs asynchronous.
v2: Support shash and ahash. Based on Mikulas' idea about implementing
    ahash support similar to dm-verity this version now adds support
    for ahash but does not replace the shash support. For more details
    see the text of the patch header.
v3: The line to store the digestsize into the new internal variable
    did not make it into the patch set which was sent out. So now
    this important code piece is also there. Also rebuilded, sparse
    checked and tested to make sure the patches are ok.
v4: Thanks to Mikulas a total new implementation of the ahash support
    for the dm-integrity layer :-)
v5: Slight rework around the allocation and comparing of ahash and
    shash algorithm.
    V5 has been tested with the new introduced ahash phmac which is a
    protected key ("hardware key") version of a hmac for s390. As of now
    phmac is only available in Herbert Xu's cryptodev-2.6 kernel tree
    but will be merged into mainline with the next merge window for
    the 6.17 development kernel.

Mikulas Patocka (2):
  dm-integrity: use internal variable for digestsize
  dm-integrity: introduce ahash support for the internal hash

 drivers/md/dm-integrity.c | 370 +++++++++++++++++++++++++++-----------
 1 file changed, 265 insertions(+), 105 deletions(-)


base-commit: 89be9a83ccf1f88522317ce02f854f30d6115c41
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2.43.0