[PATCH v3 01/28] crypto: change backlog return code to -EIOCBQUEUED
Gilad Ben-Yossef
gilad at benyossef.com
Sun Jul 2 07:41:43 PDT 2017
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
was queued in the backlog to -EIOCBQUEUED, thus resolving both
issues.
Signed-off-by: Gilad Ben-Yossef <gilad at benyossef.com>
---
crypto/af_alg.c | 2 +-
crypto/ahash.c | 12 +++---------
crypto/algapi.c | 6 ++++--
crypto/asymmetric_keys/public_key.c | 2 +-
crypto/chacha20poly1305.c | 2 +-
crypto/cryptd.c | 4 +---
crypto/cts.c | 6 ++----
crypto/drbg.c | 2 +-
crypto/gcm.c | 2 +-
crypto/lrw.c | 8 ++------
crypto/rsa-pkcs1pad.c | 16 ++++------------
crypto/tcrypt.c | 6 +++---
crypto/testmgr.c | 12 ++++++------
crypto/xts.c | 8 ++------
14 files changed, 32 insertions(+), 56 deletions(-)
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 3556d8e..c67daba 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -484,7 +484,7 @@ int af_alg_wait_for_completion(int err, struct af_alg_completion *completion)
{
switch (err) {
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&completion->completion);
reinit_completion(&completion->completion);
err = completion->err;
diff --git a/crypto/ahash.c b/crypto/ahash.c
index 826cd7a..65d08db 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -334,9 +334,7 @@ static int ahash_op_unaligned(struct ahash_request *req,
return err;
err = op(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY && (ahash_request_flags(req) &
- CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
ahash_restore_req(req, err);
@@ -394,9 +392,7 @@ static int ahash_def_finup_finish1(struct ahash_request *req, int err)
req->base.complete = ahash_def_finup_done2;
err = crypto_ahash_reqtfm(req)->final(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY && (ahash_request_flags(req) &
- CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
out:
@@ -432,9 +428,7 @@ static int ahash_def_finup(struct ahash_request *req)
return err;
err = tfm->update(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY && (ahash_request_flags(req) &
- CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
return ahash_def_finup_finish1(req, err);
diff --git a/crypto/algapi.c b/crypto/algapi.c
index e4cc761..3bfd1fa 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 = -EBUSY;
goto out;
+ }
+ err = -EIOCBQUEUED;
if (queue->backlog == &queue->list)
queue->backlog = &request->list;
}
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 3cd6e12..3fad1fd 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -141,7 +141,7 @@ int public_key_verify_signature(const struct public_key *pkey,
* signature and returns that to us.
*/
ret = crypto_akcipher_verify(req);
- if ((ret == -EINPROGRESS) || (ret == -EBUSY)) {
+ if ((ret == -EINPROGRESS) || (ret == -EIOCBQUEUED)) {
wait_for_completion(&compl.completion);
ret = compl.err;
}
diff --git a/crypto/chacha20poly1305.c b/crypto/chacha20poly1305.c
index db1bc31..e0e2785 100644
--- a/crypto/chacha20poly1305.c
+++ b/crypto/chacha20poly1305.c
@@ -79,7 +79,7 @@ static inline void async_done_continue(struct aead_request *req, int err,
if (!err)
err = cont(req);
- if (err != -EINPROGRESS && err != -EBUSY)
+ if (err != -EINPROGRESS && err != -EIOCBQUEUED)
aead_request_complete(req, err);
}
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 0508c48..5daca13 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 == -EBUSY)
goto out_put_cpu;
queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
diff --git a/crypto/cts.c b/crypto/cts.c
index 243f591..e2068dc 100644
--- a/crypto/cts.c
+++ b/crypto/cts.c
@@ -136,8 +136,7 @@ static void crypto_cts_encrypt_done(struct crypto_async_request *areq, int err)
goto out;
err = cts_cbc_encrypt(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY && req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return;
out:
@@ -229,8 +228,7 @@ static void crypto_cts_decrypt_done(struct crypto_async_request *areq, int err)
goto out;
err = cts_cbc_decrypt(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY && req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return;
out:
diff --git a/crypto/drbg.c b/crypto/drbg.c
index 633a88e..850b451 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1767,7 +1767,7 @@ static int drbg_kcapi_sym_ctr(struct drbg_state *drbg,
case 0:
break;
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&drbg->ctr_completion);
if (!drbg->ctr_async_err) {
reinit_completion(&drbg->ctr_completion);
diff --git a/crypto/gcm.c b/crypto/gcm.c
index 3841b5e..ffac821 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -151,7 +151,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
sizeof(data->hash), data->iv);
err = crypto_skcipher_encrypt(&data->req);
- if (err == -EINPROGRESS || err == -EBUSY) {
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED) {
wait_for_completion(&data->result.completion);
err = data->result.err;
}
diff --git a/crypto/lrw.c b/crypto/lrw.c
index a8bfae4..e2b1378 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -328,9 +328,7 @@ static int do_encrypt(struct skcipher_request *req, int err)
crypto_skcipher_encrypt(subreq) ?:
post_crypt(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY &&
- req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
}
@@ -380,9 +378,7 @@ static int do_decrypt(struct skcipher_request *req, int err)
crypto_skcipher_decrypt(subreq) ?:
post_crypt(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY &&
- req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
}
diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c
index 407c64b..3c82542 100644
--- a/crypto/rsa-pkcs1pad.c
+++ b/crypto/rsa-pkcs1pad.c
@@ -279,9 +279,7 @@ static int pkcs1pad_encrypt(struct akcipher_request *req)
req->dst, ctx->key_size - 1, req->dst_len);
err = crypto_akcipher_encrypt(&req_ctx->child_req);
- if (err != -EINPROGRESS &&
- (err != -EBUSY ||
- !(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err != -EINPROGRESS && err != -EIOCBQUEUED)
return pkcs1pad_encrypt_sign_complete(req, err);
return err;
@@ -383,9 +381,7 @@ static int pkcs1pad_decrypt(struct akcipher_request *req)
ctx->key_size);
err = crypto_akcipher_decrypt(&req_ctx->child_req);
- if (err != -EINPROGRESS &&
- (err != -EBUSY ||
- !(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err != -EINPROGRESS && err != -EIOCBQUEUED)
return pkcs1pad_decrypt_complete(req, err);
return err;
@@ -440,9 +436,7 @@ static int pkcs1pad_sign(struct akcipher_request *req)
req->dst, ctx->key_size - 1, req->dst_len);
err = crypto_akcipher_sign(&req_ctx->child_req);
- if (err != -EINPROGRESS &&
- (err != -EBUSY ||
- !(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err != -EINPROGRESS && err != -EIOCBQUEUED)
return pkcs1pad_encrypt_sign_complete(req, err);
return err;
@@ -561,9 +555,7 @@ static int pkcs1pad_verify(struct akcipher_request *req)
ctx->key_size);
err = crypto_akcipher_verify(&req_ctx->child_req);
- if (err != -EINPROGRESS &&
- (err != -EBUSY ||
- !(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)))
+ if (err != -EINPROGRESS && err != -EIOCBQUEUED)
return pkcs1pad_verify_complete(req, err);
return err;
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 0dd6a43..57f7ac4 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -97,7 +97,7 @@ static void tcrypt_complete(struct crypto_async_request *req, int err)
static inline int do_one_aead_op(struct aead_request *req, int ret)
{
- if (ret == -EINPROGRESS || ret == -EBUSY) {
+ if (ret == -EINPROGRESS || ret == -EIOCBQUEUED) {
struct tcrypt_result *tr = req->base.data;
ret = wait_for_completion_interruptible(&tr->completion);
@@ -397,7 +397,7 @@ static void test_hash_sg_init(struct scatterlist *sg)
static inline int do_one_ahash_op(struct ahash_request *req, int ret)
{
- if (ret == -EINPROGRESS || ret == -EBUSY) {
+ if (ret == -EINPROGRESS || ret == -EIOCBQUEUED) {
struct tcrypt_result *tr = req->base.data;
wait_for_completion(&tr->completion);
@@ -765,7 +765,7 @@ static void test_hash_speed(const char *algo, unsigned int secs,
static inline int do_one_acipher_op(struct skcipher_request *req, int ret)
{
- if (ret == -EINPROGRESS || ret == -EBUSY) {
+ if (ret == -EINPROGRESS || ret == -EIOCBQUEUED) {
struct tcrypt_result *tr = req->base.data;
wait_for_completion(&tr->completion);
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 7125ba3..fb5418f 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -195,7 +195,7 @@ static void testmgr_free_buf(char *buf[XBUFSIZE])
static int wait_async_op(struct tcrypt_result *tr, int ret)
{
- if (ret == -EINPROGRESS || ret == -EBUSY) {
+ if (ret == -EINPROGRESS || ret == -EIOCBQUEUED) {
wait_for_completion(&tr->completion);
reinit_completion(&tr->completion);
ret = tr->err;
@@ -425,7 +425,7 @@ static int __test_hash(struct crypto_ahash *tfm,
case 0:
break;
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&tresult.completion);
reinit_completion(&tresult.completion);
ret = tresult.err;
@@ -723,7 +723,7 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
}
break;
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&result.completion);
reinit_completion(&result.completion);
ret = result.err;
@@ -880,7 +880,7 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
}
break;
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&result.completion);
reinit_completion(&result.completion);
ret = result.err;
@@ -1171,7 +1171,7 @@ static int __test_skcipher(struct crypto_skcipher *tfm, int enc,
case 0:
break;
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&result.completion);
reinit_completion(&result.completion);
ret = result.err;
@@ -1279,7 +1279,7 @@ static int __test_skcipher(struct crypto_skcipher *tfm, int enc,
case 0:
break;
case -EINPROGRESS:
- case -EBUSY:
+ case -EIOCBQUEUED:
wait_for_completion(&result.completion);
reinit_completion(&result.completion);
ret = result.err;
diff --git a/crypto/xts.c b/crypto/xts.c
index d86c11a..b4b90cc 100644
--- a/crypto/xts.c
+++ b/crypto/xts.c
@@ -269,9 +269,7 @@ static int do_encrypt(struct skcipher_request *req, int err)
crypto_skcipher_encrypt(subreq) ?:
post_crypt(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY &&
- req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
}
@@ -321,9 +319,7 @@ static int do_decrypt(struct skcipher_request *req, int err)
crypto_skcipher_decrypt(subreq) ?:
post_crypt(req);
- if (err == -EINPROGRESS ||
- (err == -EBUSY &&
- req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ if (err == -EINPROGRESS || err == -EIOCBQUEUED)
return err;
}
--
2.1.4
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