[PATCH v8 00/20] simplify crypto wait for async op
Gilad Ben-Yossef
gilad at benyossef.com
Tue Sep 5 12:38:39 UTC 2017
Many users of kernel async. crypto services have a pattern of
starting an async. crypto op and than using a completion
to wait for it to end.
This patch set simplifies this common use case in two ways:
First, by separating the return codes of the case where a
request is queued to a backlog due to the provider being
busy (-EBUSY) from the case the request has failed due
to the provider being busy and backlogging is not enabled
(-EAGAIN).
Next, this change is than built on to create a generic API
to wait for a async. crypto operation to complete.
The end result is a smaller code base and an API that is
easier to use and more difficult to get wrong.
The patch set was boot tested on x86_64 and arm64 which
at the very least tests the crypto users via testmgr and
tcrypt but I do note that I do not have access to some
of the HW whose drivers are modified nor do I claim I was
able to test all of the corner cases.
The patch set is based upon linux-next release tagged
next-20170905.
Changes from v7:
- Turn -EBUSY to -EAGAIN also in crypto using net
code which I missed before, as has been pointed
out by Harsh Jain.
Changes from v6:
- Fix brown paper bag compile error on marvell/cesa
code.
Changes from v5:
- Remove redundant new line as spotted by Jonathan
Cameron.
- Reworded dm-verity change commit message to better
clarify potential issue averted by change as
pointed out by Mikulas Patocka.
Changes from v4:
- Rebase on top of latest algif changes from Stephan
Mueller.
- Fix typo in ccp patch title.
Changes from v3:
- Instead of changing the return code to indicate
backlog queueing, change the return code to indicate
transient busy state, as suggested by Herbert Xu.
Changes from v2:
- Patch title changed from "introduce crypto wait for
async op" to better reflect the current state.
- Rebase on top of latest linux-next.
- Add a new return code of -EIOCBQUEUED for backlog
queueing, as suggested by Herbert Xu.
- Transform more users to the new API.
- Update the drbg change to account for new init as
indicated by Stephan Muller.
Changes from v1:
- Address review comments from Eric Biggers.
- Separated out bug fixes of existing code and rebase
on top of that patch set.
- Rename 'ecr' to 'wait' in fscrypto code.
- Split patch introducing the new API from the change
moving over the algif code which it originated from
to the new API.
- Inline crypto_wait_req().
- Some code indentation fixes.
Gilad Ben-Yossef (20):
crypto: change transient busy return code to -EAGAIN
crypto: ccp: use -EAGAIN for transient busy indication
net: use -EAGAIN for transient busy indication
crypto: remove redundant backlog checks on EBUSY
crypto: marvell/cesa: remove redundant backlog checks on EBUSY
crypto: introduce crypto wait for async op
crypto: move algif to generic async completion
crypto: move pub key to generic async completion
crypto: move drbg to generic async completion
crypto: move gcm to generic async completion
crypto: move testmgr to generic async completion
fscrypt: move to generic async completion
dm: move dm-verity to generic async completion
cifs: move to generic async completion
ima: move to generic async completion
crypto: tcrypt: move to generic async completion
crypto: talitos: move to generic async completion
crypto: qce: move to generic async completion
crypto: mediatek: move to generic async completion
crypto: adapt api sample to use async. op wait
Documentation/crypto/api-samples.rst | 52 ++-------
crypto/af_alg.c | 27 -----
crypto/ahash.c | 12 +--
crypto/algapi.c | 6 +-
crypto/algif_aead.c | 8 +-
crypto/algif_hash.c | 50 +++++----
crypto/algif_skcipher.c | 9 +-
crypto/api.c | 13 +++
crypto/asymmetric_keys/public_key.c | 28 +----
crypto/cryptd.c | 4 +-
crypto/cts.c | 6 +-
crypto/drbg.c | 36 ++-----
crypto/gcm.c | 32 ++----
crypto/lrw.c | 8 +-
crypto/rsa-pkcs1pad.c | 16 +--
crypto/tcrypt.c | 84 +++++----------
crypto/testmgr.c | 204 ++++++++++++-----------------------
crypto/xts.c | 8 +-
drivers/crypto/ccp/ccp-crypto-main.c | 8 +-
drivers/crypto/ccp/ccp-dev.c | 7 +-
drivers/crypto/marvell/cesa.c | 3 +-
drivers/crypto/marvell/cesa.h | 2 +-
drivers/crypto/mediatek/mtk-aes.c | 31 +-----
drivers/crypto/qce/sha.c | 30 +-----
drivers/crypto/talitos.c | 38 +------
drivers/md/dm-verity-target.c | 81 ++++----------
drivers/md/dm-verity.h | 5 -
fs/cifs/smb2ops.c | 30 +-----
fs/crypto/crypto.c | 28 +----
fs/crypto/fname.c | 36 ++-----
fs/crypto/fscrypt_private.h | 10 --
fs/crypto/keyinfo.c | 21 +---
include/crypto/drbg.h | 3 +-
include/crypto/if_alg.h | 15 +--
include/linux/crypto.h | 40 +++++++
net/ipv4/ah4.c | 2 +-
net/ipv4/esp4.c | 2 +-
net/ipv6/ah6.c | 2 +-
net/ipv6/esp6.c | 2 +-
security/integrity/ima/ima_crypto.c | 56 +++-------
40 files changed, 314 insertions(+), 741 deletions(-)
--
2.1.4
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