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cifs: move to generic async completion 

cifs starts an async. crypto op and waits for their completion.
Move it over to generic code doing the same.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2017-10-18 08:00:46 +01:00 committed by Herbert Xu
parent 12f1ffc40a
commit a5186b85fe
1 changed files with 4 additions and 26 deletions
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30
fs/cifs/smb2ops.c
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@ -2068,22 +2068,6 @@ init_sg(struct smb_rqst *rqst, u8 *sign)
return sg;
}
struct cifs_crypt_result {
int err;
struct completion completion;
};
static void cifs_crypt_complete(struct crypto_async_request *req, int err)
{
struct cifs_crypt_result *res = req->data;
if (err == -EINPROGRESS)
return;
res->err = err;
complete(&res->completion);
}
static int
smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
{
@ -2124,12 +2108,10 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
struct aead_request *req;
char *iv;
unsigned int iv_len;
struct cifs_crypt_result result = {0, };
DECLARE_CRYPTO_WAIT(wait);
struct crypto_aead *tfm;
unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
init_completion(&result.completion);
rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
if (rc) {
cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
@ -2189,14 +2171,10 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
aead_request_set_ad(req, assoc_data_len);
aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
cifs_crypt_complete, &result);
crypto_req_done, &wait);
rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
if (rc == -EINPROGRESS || rc == -EBUSY) {
wait_for_completion(&result.completion);
rc = result.err;
}
rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
: crypto_aead_decrypt(req), &wait);
if (!rc && enc)
memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);