diff options
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/ahash.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/crypto/ahash.c b/crypto/ahash.c index 6e7223392e80..f2a5d8f656ff 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -15,6 +15,7 @@ #include <crypto/internal/hash.h> #include <crypto/scatterwalk.h> +#include <linux/bug.h> #include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> @@ -46,7 +47,10 @@ static int hash_walk_next(struct crypto_hash_walk *walk) unsigned int nbytes = min(walk->entrylen, ((unsigned int)(PAGE_SIZE)) - offset); - walk->data = kmap_atomic(walk->pg); + if (walk->flags & CRYPTO_ALG_ASYNC) + walk->data = kmap(walk->pg); + else + walk->data = kmap_atomic(walk->pg); walk->data += offset; if (offset & alignmask) { @@ -93,8 +97,16 @@ int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err) return nbytes; } - kunmap_atomic(walk->data); - crypto_yield(walk->flags); + if (walk->flags & CRYPTO_ALG_ASYNC) + kunmap(walk->pg); + else { + kunmap_atomic(walk->data); + /* + * The may sleep test only makes sense for sync users. + * Async users don't need to sleep here anyway. + */ + crypto_yield(walk->flags); + } if (err) return err; @@ -124,12 +136,31 @@ int crypto_hash_walk_first(struct ahash_request *req, walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req)); walk->sg = req->src; - walk->flags = req->base.flags; + walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK; return hash_walk_new_entry(walk); } EXPORT_SYMBOL_GPL(crypto_hash_walk_first); +int crypto_ahash_walk_first(struct ahash_request *req, + struct crypto_hash_walk *walk) +{ + walk->total = req->nbytes; + + if (!walk->total) + return 0; + + walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req)); + walk->sg = req->src; + walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK; + walk->flags |= CRYPTO_ALG_ASYNC; + + BUILD_BUG_ON(CRYPTO_TFM_REQ_MASK & CRYPTO_ALG_ASYNC); + + return hash_walk_new_entry(walk); +} +EXPORT_SYMBOL_GPL(crypto_ahash_walk_first); + int crypto_hash_walk_first_compat(struct hash_desc *hdesc, struct crypto_hash_walk *walk, struct scatterlist *sg, unsigned int len) @@ -141,7 +172,7 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc, walk->alignmask = crypto_hash_alignmask(hdesc->tfm); walk->sg = sg; - walk->flags = hdesc->flags; + walk->flags = hdesc->flags & CRYPTO_TFM_REQ_MASK; return hash_walk_new_entry(walk); } |