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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-10-18 08:00:33 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-11-03 22:11:16 +0800 |
| commit | 6b80ea389a0bceee6a0a801474b78ad0a8cd034d (patch) | |
| tree | 6f4725c6a0ac6c093a1f6dc4077fb40865cf3882 /crypto | |
| parent | c8dd5e456d2483f051bc92f9c67f01144d122a0b (diff) | |
| download | lwn-6b80ea389a0bceee6a0a801474b78ad0a8cd034d.tar.gz lwn-6b80ea389a0bceee6a0a801474b78ad0a8cd034d.zip | |
crypto: change transient busy return code to -ENOSPC
The crypto API was using the -EBUSY return value to indicate
both a hard failure to submit a crypto operation into a
transformation provider when the latter was busy and the backlog
mechanism was not enabled as well as a notification that the
operation was queued into the backlog when the backlog mechanism
was enabled.
Having the same return code indicate two very different conditions
depending on a flag is both error prone and requires extra runtime
check like the following to discern between the cases:
if (err == -EINPROGRESS ||
(err == -EBUSY && (ahash_request_flags(req) &
CRYPTO_TFM_REQ_MAY_BACKLOG)))
This patch changes the return code used to indicate a crypto op
failed due to the transformation provider being transiently busy
to -ENOSPC.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/algapi.c | 6 | ||||
| -rw-r--r-- | crypto/cryptd.c | 4 |
2 files changed, 5 insertions, 5 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c index aa699ff6c876..60d7366ed343 100644 --- a/crypto/algapi.c +++ b/crypto/algapi.c @@ -897,9 +897,11 @@ int crypto_enqueue_request(struct crypto_queue *queue, int err = -EINPROGRESS; if (unlikely(queue->qlen >= queue->max_qlen)) { - err = -EBUSY; - if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { + err = -ENOSPC; goto out; + } + err = -EBUSY; if (queue->backlog == &queue->list) queue->backlog = &request->list; } diff --git a/crypto/cryptd.c b/crypto/cryptd.c index 0508c48a45c4..bd43cf5be14c 100644 --- a/crypto/cryptd.c +++ b/crypto/cryptd.c @@ -137,16 +137,14 @@ static int cryptd_enqueue_request(struct cryptd_queue *queue, int cpu, err; struct cryptd_cpu_queue *cpu_queue; atomic_t *refcnt; - bool may_backlog; cpu = get_cpu(); cpu_queue = this_cpu_ptr(queue->cpu_queue); err = crypto_enqueue_request(&cpu_queue->queue, request); refcnt = crypto_tfm_ctx(request->tfm); - may_backlog = request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG; - if (err == -EBUSY && !may_backlog) + if (err == -ENOSPC) goto out_put_cpu; queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |