drbd: Use shash and ahash

This patch replaces uses of the long obsolete hash interface with
either shash (for non-SG users) or ahash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

5 files changed, 103 insertions, 87 deletions

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 34bc84efc29e..c227fd4cad75 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -26,13 +26,13 @@
 #ifndef _DRBD_INT_H
 #define _DRBD_INT_H
 
+#include <crypto/hash.h>
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/sched.h>
 #include <linux/bitops.h>
 #include <linux/slab.h>
-#include <linux/crypto.h>
 #include <linux/ratelimit.h>
 #include <linux/tcp.h>
 #include <linux/mutex.h>
@@ -724,11 +724,11 @@ struct drbd_connection {
 
         struct list_head transfer_log;  /* all requests not yet fully processed */
 
-        struct crypto_hash *cram_hmac_tfm;
-        struct crypto_hash *integrity_tfm;  /* checksums we compute, updates protected by connection->data->mutex */
-        struct crypto_hash *peer_integrity_tfm;  /* checksums we verify, only accessed from receiver thread  */
-        struct crypto_hash *csums_tfm;
-        struct crypto_hash *verify_tfm;
+        struct crypto_shash *cram_hmac_tfm;
+        struct crypto_ahash *integrity_tfm;  /* checksums we compute, updates protected by connection->data->mutex */
+        struct crypto_ahash *peer_integrity_tfm;  /* checksums we verify, only accessed from receiver thread  */
+        struct crypto_ahash *csums_tfm;
+        struct crypto_ahash *verify_tfm;
         void *int_dig_in;
         void *int_dig_vv;
 
@@ -1524,8 +1524,8 @@ static inline void ov_out_of_sync_print(struct drbd_device *device)
 }
 
 
-extern void drbd_csum_bio(struct crypto_hash *, struct bio *, void *);
-extern void drbd_csum_ee(struct crypto_hash *, struct drbd_peer_request *, void *);
+extern void drbd_csum_bio(struct crypto_ahash *, struct bio *, void *);
+extern void drbd_csum_ee(struct crypto_ahash *, struct drbd_peer_request *, void *);
 /* worker callbacks */
 extern int w_e_end_data_req(struct drbd_work *, int);
 extern int w_e_end_rsdata_req(struct drbd_work *, int);
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 5b43dfb79819..fa209773d494 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1340,7 +1340,7 @@ void drbd_send_ack_dp(struct drbd_peer_device *peer_device, enum drbd_packet cmd
                       struct p_data *dp, int data_size)
 {
         if (peer_device->connection->peer_integrity_tfm)
-                data_size -= crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm);
+                data_size -= crypto_ahash_digestsize(peer_device->connection->peer_integrity_tfm);
         _drbd_send_ack(peer_device, cmd, dp->sector, cpu_to_be32(data_size),
                        dp->block_id);
 }
@@ -1629,7 +1629,7 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *
         sock = &peer_device->connection->data;
         p = drbd_prepare_command(peer_device, sock);
         digest_size = peer_device->connection->integrity_tfm ?
-                      crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0;
+                      crypto_ahash_digestsize(peer_device->connection->integrity_tfm) : 0;
 
         if (!p)
                 return -EIO;
@@ -1718,7 +1718,7 @@ int drbd_send_block(struct drbd_peer_device *peer_device, enum drbd_packet cmd,
         p = drbd_prepare_command(peer_device, sock);
 
         digest_size = peer_device->connection->integrity_tfm ?
-                      crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0;
+                      crypto_ahash_digestsize(peer_device->connection->integrity_tfm) : 0;
 
         if (!p)
                 return -EIO;
@@ -2498,11 +2498,11 @@ void conn_free_crypto(struct drbd_connection *connection)
 {
         drbd_free_sock(connection);
 
-        crypto_free_hash(connection->csums_tfm);
-        crypto_free_hash(connection->verify_tfm);
-        crypto_free_hash(connection->cram_hmac_tfm);
-        crypto_free_hash(connection->integrity_tfm);
-        crypto_free_hash(connection->peer_integrity_tfm);
+        crypto_free_ahash(connection->csums_tfm);
+        crypto_free_ahash(connection->verify_tfm);
+        crypto_free_shash(connection->cram_hmac_tfm);
+        crypto_free_ahash(connection->integrity_tfm);
+        crypto_free_ahash(connection->peer_integrity_tfm);
         kfree(connection->int_dig_in);
         kfree(connection->int_dig_vv);
 
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index c055c5e12f24..226eb0c9f0fb 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -2160,19 +2160,34 @@ check_net_options(struct drbd_connection *connection, struct net_conf *new_net_c
 }
 
 struct crypto {
-        struct crypto_hash *verify_tfm;
-        struct crypto_hash *csums_tfm;
-        struct crypto_hash *cram_hmac_tfm;
-        struct crypto_hash *integrity_tfm;
+        struct crypto_ahash *verify_tfm;
+        struct crypto_ahash *csums_tfm;
+        struct crypto_shash *cram_hmac_tfm;
+        struct crypto_ahash *integrity_tfm;
 };
 
 static int
-alloc_hash(struct crypto_hash **tfm, char *tfm_name, int err_alg)
+alloc_shash(struct crypto_shash **tfm, char *tfm_name, int err_alg)
 {
         if (!tfm_name[0])
                 return NO_ERROR;
 
-        *tfm = crypto_alloc_hash(tfm_name, 0, CRYPTO_ALG_ASYNC);
+        *tfm = crypto_alloc_shash(tfm_name, 0, 0);
+        if (IS_ERR(*tfm)) {
+                *tfm = NULL;
+                return err_alg;
+        }
+
+        return NO_ERROR;
+}
+
+static int
+alloc_ahash(struct crypto_ahash **tfm, char *tfm_name, int err_alg)
+{
+        if (!tfm_name[0])
+                return NO_ERROR;
+
+        *tfm = crypto_alloc_ahash(tfm_name, 0, CRYPTO_ALG_ASYNC);
         if (IS_ERR(*tfm)) {
                 *tfm = NULL;
                 return err_alg;
@@ -2187,24 +2202,24 @@ alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf)
         char hmac_name[CRYPTO_MAX_ALG_NAME];
         enum drbd_ret_code rv;
 
-        rv = alloc_hash(&crypto->csums_tfm, new_net_conf->csums_alg,
-                       ERR_CSUMS_ALG);
+        rv = alloc_ahash(&crypto->csums_tfm, new_net_conf->csums_alg,
+                         ERR_CSUMS_ALG);
         if (rv != NO_ERROR)
                 return rv;
-        rv = alloc_hash(&crypto->verify_tfm, new_net_conf->verify_alg,
-                       ERR_VERIFY_ALG);
+        rv = alloc_ahash(&crypto->verify_tfm, new_net_conf->verify_alg,
+                         ERR_VERIFY_ALG);
         if (rv != NO_ERROR)
                 return rv;
-        rv = alloc_hash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
-                       ERR_INTEGRITY_ALG);
+        rv = alloc_ahash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
+                         ERR_INTEGRITY_ALG);
         if (rv != NO_ERROR)
                 return rv;
         if (new_net_conf->cram_hmac_alg[0] != 0) {
                 snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
                          new_net_conf->cram_hmac_alg);
 
-                rv = alloc_hash(&crypto->cram_hmac_tfm, hmac_name,
-                               ERR_AUTH_ALG);
+                rv = alloc_shash(&crypto->cram_hmac_tfm, hmac_name,
+                                 ERR_AUTH_ALG);
         }
 
         return rv;
@@ -2212,10 +2227,10 @@ alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf)
 
 static void free_crypto(struct crypto *crypto)
 {
-        crypto_free_hash(crypto->cram_hmac_tfm);
-        crypto_free_hash(crypto->integrity_tfm);
-        crypto_free_hash(crypto->csums_tfm);
-        crypto_free_hash(crypto->verify_tfm);
+        crypto_free_shash(crypto->cram_hmac_tfm);
+        crypto_free_ahash(crypto->integrity_tfm);
+        crypto_free_ahash(crypto->csums_tfm);
+        crypto_free_ahash(crypto->verify_tfm);
 }
 
 int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
@@ -2292,23 +2307,23 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
         rcu_assign_pointer(connection->net_conf, new_net_conf);
 
         if (!rsr) {
-                crypto_free_hash(connection->csums_tfm);
+                crypto_free_ahash(connection->csums_tfm);
                 connection->csums_tfm = crypto.csums_tfm;
                 crypto.csums_tfm = NULL;
         }
         if (!ovr) {
-                crypto_free_hash(connection->verify_tfm);
+                crypto_free_ahash(connection->verify_tfm);
                 connection->verify_tfm = crypto.verify_tfm;
                 crypto.verify_tfm = NULL;
         }
 
-        crypto_free_hash(connection->integrity_tfm);
+        crypto_free_ahash(connection->integrity_tfm);
         connection->integrity_tfm = crypto.integrity_tfm;
         if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)
                 /* Do this without trying to take connection->data.mutex again.  */
                 __drbd_send_protocol(connection, P_PROTOCOL_UPDATE);
 
-        crypto_free_hash(connection->cram_hmac_tfm);
+        crypto_free_shash(connection->cram_hmac_tfm);
         connection->cram_hmac_tfm = crypto.cram_hmac_tfm;
 
         mutex_unlock(&connection->resource->conf_update);
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 1957fe8601dc..050aaa1c0350 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1627,7 +1627,7 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
 
         digest_size = 0;
         if (!trim && peer_device->connection->peer_integrity_tfm) {
-                digest_size = crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm);
+                digest_size = crypto_ahash_digestsize(peer_device->connection->peer_integrity_tfm);
                 /*
                  * FIXME: Receive the incoming digest into the receive buffer
                  *        here, together with its struct p_data?
@@ -1741,7 +1741,7 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req
 
         digest_size = 0;
         if (peer_device->connection->peer_integrity_tfm) {
-                digest_size = crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm);
+                digest_size = crypto_ahash_digestsize(peer_device->connection->peer_integrity_tfm);
                 err = drbd_recv_all_warn(peer_device->connection, dig_in, digest_size);
                 if (err)
                         return err;
@@ -3321,7 +3321,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
         int p_proto, p_discard_my_data, p_two_primaries, cf;
         struct net_conf *nc, *old_net_conf, *new_net_conf = NULL;
         char integrity_alg[SHARED_SECRET_MAX] = "";
-        struct crypto_hash *peer_integrity_tfm = NULL;
+        struct crypto_ahash *peer_integrity_tfm = NULL;
         void *int_dig_in = NULL, *int_dig_vv = NULL;
 
         p_proto         = be32_to_cpu(p->protocol);
@@ -3402,14 +3402,14 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
                  * change.
                  */
 
-                peer_integrity_tfm = crypto_alloc_hash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
+                peer_integrity_tfm = crypto_alloc_ahash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
                 if (!peer_integrity_tfm) {
                         drbd_err(connection, "peer data-integrity-alg %s not supported\n",
                                  integrity_alg);
                         goto disconnect;
                 }
 
-                hash_size = crypto_hash_digestsize(peer_integrity_tfm);
+                hash_size = crypto_ahash_digestsize(peer_integrity_tfm);
                 int_dig_in = kmalloc(hash_size, GFP_KERNEL);
                 int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
                 if (!(int_dig_in && int_dig_vv)) {
@@ -3439,7 +3439,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
         mutex_unlock(&connection->resource->conf_update);
         mutex_unlock(&connection->data.mutex);
 
-        crypto_free_hash(connection->peer_integrity_tfm);
+        crypto_free_ahash(connection->peer_integrity_tfm);
         kfree(connection->int_dig_in);
         kfree(connection->int_dig_vv);
         connection->peer_integrity_tfm = peer_integrity_tfm;
@@ -3457,7 +3457,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
 disconnect_rcu_unlock:
         rcu_read_unlock();
 disconnect:
-        crypto_free_hash(peer_integrity_tfm);
+        crypto_free_ahash(peer_integrity_tfm);
         kfree(int_dig_in);
         kfree(int_dig_vv);
         conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_HARD);
@@ -3469,15 +3469,15 @@ disconnect:
  * return: NULL (alg name was "")
  *         ERR_PTR(error) if something goes wrong
  *         or the crypto hash ptr, if it worked out ok. */
-static struct crypto_hash *drbd_crypto_alloc_digest_safe(const struct drbd_device *device,
+static struct crypto_ahash *drbd_crypto_alloc_digest_safe(const struct drbd_device *device,
                 const char *alg, const char *name)
 {
-        struct crypto_hash *tfm;
+        struct crypto_ahash *tfm;
 
         if (!alg[0])
                 return NULL;
 
-        tfm = crypto_alloc_hash(alg, 0, CRYPTO_ALG_ASYNC);
+        tfm = crypto_alloc_ahash(alg, 0, CRYPTO_ALG_ASYNC);
         if (IS_ERR(tfm)) {
                 drbd_err(device, "Can not allocate \"%s\" as %s (reason: %ld)\n",
                         alg, name, PTR_ERR(tfm));
@@ -3530,8 +3530,8 @@ static int receive_SyncParam(struct drbd_connection *connection, struct packet_i
         struct drbd_device *device;
         struct p_rs_param_95 *p;
         unsigned int header_size, data_size, exp_max_sz;
-        struct crypto_hash *verify_tfm = NULL;
-        struct crypto_hash *csums_tfm = NULL;
+        struct crypto_ahash *verify_tfm = NULL;
+        struct crypto_ahash *csums_tfm = NULL;
         struct net_conf *old_net_conf, *new_net_conf = NULL;
         struct disk_conf *old_disk_conf = NULL, *new_disk_conf = NULL;
         const int apv = connection->agreed_pro_version;
@@ -3678,14 +3678,14 @@ static int receive_SyncParam(struct drbd_connection *connection, struct packet_i
                         if (verify_tfm) {
                                 strcpy(new_net_conf->verify_alg, p->verify_alg);
                                 new_net_conf->verify_alg_len = strlen(p->verify_alg) + 1;
-                                crypto_free_hash(peer_device->connection->verify_tfm);
+                                crypto_free_ahash(peer_device->connection->verify_tfm);
                                 peer_device->connection->verify_tfm = verify_tfm;
                                 drbd_info(device, "using verify-alg: \"%s\"\n", p->verify_alg);
                         }
                         if (csums_tfm) {
                                 strcpy(new_net_conf->csums_alg, p->csums_alg);
                                 new_net_conf->csums_alg_len = strlen(p->csums_alg) + 1;
-                                crypto_free_hash(peer_device->connection->csums_tfm);
+                                crypto_free_ahash(peer_device->connection->csums_tfm);
                                 peer_device->connection->csums_tfm = csums_tfm;
                                 drbd_info(device, "using csums-alg: \"%s\"\n", p->csums_alg);
                         }
@@ -3729,9 +3729,9 @@ disconnect:
         mutex_unlock(&connection->resource->conf_update);
         /* just for completeness: actually not needed,
          * as this is not reached if csums_tfm was ok. */
-        crypto_free_hash(csums_tfm);
+        crypto_free_ahash(csums_tfm);
         /* but free the verify_tfm again, if csums_tfm did not work out */
-        crypto_free_hash(verify_tfm);
+        crypto_free_ahash(verify_tfm);
         conn_request_state(peer_device->connection, NS(conn, C_DISCONNECTING), CS_HARD);
         return -EIO;
 }
@@ -4925,14 +4925,13 @@ static int drbd_do_auth(struct drbd_connection *connection)
 {
         struct drbd_socket *sock;
         char my_challenge[CHALLENGE_LEN];  /* 64 Bytes... */
-        struct scatterlist sg;
         char *response = NULL;
         char *right_response = NULL;
         char *peers_ch = NULL;
         unsigned int key_len;
         char secret[SHARED_SECRET_MAX]; /* 64 byte */
         unsigned int resp_size;
-        struct hash_desc desc;
+        SHASH_DESC_ON_STACK(desc, connection->cram_hmac_tfm);
         struct packet_info pi;
         struct net_conf *nc;
         int err, rv;
@@ -4945,12 +4944,12 @@ static int drbd_do_auth(struct drbd_connection *connection)
         memcpy(secret, nc->shared_secret, key_len);
         rcu_read_unlock();
 
-        desc.tfm = connection->cram_hmac_tfm;
-        desc.flags = 0;
+        desc->tfm = connection->cram_hmac_tfm;
+        desc->flags = 0;
 
-        rv = crypto_hash_setkey(connection->cram_hmac_tfm, (u8 *)secret, key_len);
+        rv = crypto_shash_setkey(connection->cram_hmac_tfm, (u8 *)secret, key_len);
         if (rv) {
-                drbd_err(connection, "crypto_hash_setkey() failed with %d\n", rv);
+                drbd_err(connection, "crypto_shash_setkey() failed with %d\n", rv);
                 rv = -1;
                 goto fail;
         }
@@ -5011,7 +5010,7 @@ static int drbd_do_auth(struct drbd_connection *connection)
                 goto fail;
         }
 
-        resp_size = crypto_hash_digestsize(connection->cram_hmac_tfm);
+        resp_size = crypto_shash_digestsize(connection->cram_hmac_tfm);
         response = kmalloc(resp_size, GFP_NOIO);
         if (response == NULL) {
                 drbd_err(connection, "kmalloc of response failed\n");
@@ -5019,10 +5018,7 @@ static int drbd_do_auth(struct drbd_connection *connection)
                 goto fail;
         }
 
-        sg_init_table(&sg, 1);
-        sg_set_buf(&sg, peers_ch, pi.size);
-
-        rv = crypto_hash_digest(&desc, &sg, sg.length, response);
+        rv = crypto_shash_digest(desc, peers_ch, pi.size, response);
         if (rv) {
                 drbd_err(connection, "crypto_hash_digest() failed with %d\n", rv);
                 rv = -1;
@@ -5070,9 +5066,8 @@ static int drbd_do_auth(struct drbd_connection *connection)
                 goto fail;
         }
 
-        sg_set_buf(&sg, my_challenge, CHALLENGE_LEN);
-
-        rv = crypto_hash_digest(&desc, &sg, sg.length, right_response);
+        rv = crypto_shash_digest(desc, my_challenge, CHALLENGE_LEN,
+                                 right_response);
         if (rv) {
                 drbd_err(connection, "crypto_hash_digest() failed with %d\n", rv);
                 rv = -1;
@@ -5091,6 +5086,7 @@ static int drbd_do_auth(struct drbd_connection *connection)
         kfree(peers_ch);
         kfree(response);
         kfree(right_response);
+        shash_desc_zero(desc);
 
         return rv;
 }
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index eff716c27b1f..4d87499f0d54 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -274,51 +274,56 @@ void drbd_request_endio(struct bio *bio)
                 complete_master_bio(device, &m);
 }
 
-void drbd_csum_ee(struct crypto_hash *tfm, struct drbd_peer_request *peer_req, void *digest)
+void drbd_csum_ee(struct crypto_ahash *tfm, struct drbd_peer_request *peer_req, void *digest)
 {
-        struct hash_desc desc;
+        AHASH_REQUEST_ON_STACK(req, tfm);
         struct scatterlist sg;
         struct page *page = peer_req->pages;
         struct page *tmp;
         unsigned len;
 
-        desc.tfm = tfm;
-        desc.flags = 0;
+        ahash_request_set_tfm(req, tfm);
+        ahash_request_set_callback(req, 0, NULL, NULL);
 
         sg_init_table(&sg, 1);
-        crypto_hash_init(&desc);
+        crypto_ahash_init(req);
 
         while ((tmp = page_chain_next(page))) {
                 /* all but the last page will be fully used */
                 sg_set_page(&sg, page, PAGE_SIZE, 0);
-                crypto_hash_update(&desc, &sg, sg.length);
+                ahash_request_set_crypt(req, &sg, NULL, sg.length);
+                crypto_ahash_update(req);
                 page = tmp;
         }
         /* and now the last, possibly only partially used page */
         len = peer_req->i.size & (PAGE_SIZE - 1);
         sg_set_page(&sg, page, len ?: PAGE_SIZE, 0);
-        crypto_hash_update(&desc, &sg, sg.length);
-        crypto_hash_final(&desc, digest);
+        ahash_request_set_crypt(req, &sg, digest, sg.length);
+        crypto_ahash_finup(req);
+        ahash_request_zero(req);
 }
 
-void drbd_csum_bio(struct crypto_hash *tfm, struct bio *bio, void *digest)
+void drbd_csum_bio(struct crypto_ahash *tfm, struct bio *bio, void *digest)
 {
-        struct hash_desc desc;
+        AHASH_REQUEST_ON_STACK(req, tfm);
         struct scatterlist sg;
         struct bio_vec bvec;
         struct bvec_iter iter;
 
-        desc.tfm = tfm;
-        desc.flags = 0;
+        ahash_request_set_tfm(req, tfm);
+        ahash_request_set_callback(req, 0, NULL, NULL);
 
         sg_init_table(&sg, 1);
-        crypto_hash_init(&desc);
+        crypto_ahash_init(req);
 
         bio_for_each_segment(bvec, bio, iter) {
                 sg_set_page(&sg, bvec.bv_page, bvec.bv_len, bvec.bv_offset);
-                crypto_hash_update(&desc, &sg, sg.length);
+                ahash_request_set_crypt(req, &sg, NULL, sg.length);
+                crypto_ahash_update(req);
         }
-        crypto_hash_final(&desc, digest);
+        ahash_request_set_crypt(req, NULL, digest, 0);
+        crypto_ahash_final(req);
+        ahash_request_zero(req);
 }
 
 /* MAYBE merge common code with w_e_end_ov_req */
@@ -337,7 +342,7 @@ static int w_e_send_csum(struct drbd_work *w, int cancel)
         if (unlikely((peer_req->flags & EE_WAS_ERROR) != 0))
                 goto out;
 
-        digest_size = crypto_hash_digestsize(peer_device->connection->csums_tfm);
+        digest_size = crypto_ahash_digestsize(peer_device->connection->csums_tfm);
         digest = kmalloc(digest_size, GFP_NOIO);
         if (digest) {
                 sector_t sector = peer_req->i.sector;
@@ -1113,7 +1118,7 @@ int w_e_end_csum_rs_req(struct drbd_work *w, int cancel)
                  * a real fix would be much more involved,
                  * introducing more locking mechanisms */
                 if (peer_device->connection->csums_tfm) {
-                        digest_size = crypto_hash_digestsize(peer_device->connection->csums_tfm);
+                        digest_size = crypto_ahash_digestsize(peer_device->connection->csums_tfm);
                         D_ASSERT(device, digest_size == di->digest_size);
                         digest = kmalloc(digest_size, GFP_NOIO);
                 }
@@ -1163,7 +1168,7 @@ int w_e_end_ov_req(struct drbd_work *w, int cancel)
         if (unlikely(cancel))
                 goto out;
 
-        digest_size = crypto_hash_digestsize(peer_device->connection->verify_tfm);
+        digest_size = crypto_ahash_digestsize(peer_device->connection->verify_tfm);
         digest = kmalloc(digest_size, GFP_NOIO);
         if (!digest) {
                 err = 1;        /* terminate the connection in case the allocation failed */
@@ -1235,7 +1240,7 @@ int w_e_end_ov_reply(struct drbd_work *w, int cancel)
         di = peer_req->digest;
 
         if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) {
-                digest_size = crypto_hash_digestsize(peer_device->connection->verify_tfm);
+                digest_size = crypto_ahash_digestsize(peer_device->connection->verify_tfm);
                 digest = kmalloc(digest_size, GFP_NOIO);
                 if (digest) {
                         drbd_csum_ee(peer_device->connection->verify_tfm, peer_req, digest);