[SCSI] iscsi: Use crypto_hash interface instead of crypto_digest

This patch converts ISCSI to use the new crypto_hash interface instead
of crypto_digest.  It's a fairly straightforward substitution.

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

2 files changed, 78 insertions, 65 deletions

diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 058f094f945a..66a1ae1d6982 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -26,6 +26,7 @@
  *      Zhenyu Wang
  */
 
+#include <linux/err.h>
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/inet.h>
@@ -107,8 +108,11 @@ iscsi_hdr_digest(struct iscsi_conn *conn, struct iscsi_buf *buf,
                  u8* crc)
 {
         struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+        struct hash_desc desc;
 
-        crypto_digest_digest(tcp_conn->tx_tfm, &buf->sg, 1, crc);
+        desc.tfm = tcp_conn->tx_tfm;
+        desc.flags = 0;
+        crypto_hash_digest(&desc, &buf->sg, buf->sg.length, crc);
         buf->sg.length += sizeof(uint32_t);
 }
 
@@ -452,11 +456,14 @@ iscsi_tcp_hdr_recv(struct iscsi_conn *conn)
         }
 
         if (conn->hdrdgst_en) {
+                struct hash_desc desc;
                 struct scatterlist sg;
 
                 sg_init_one(&sg, (u8 *)hdr,
                             sizeof(struct iscsi_hdr) + ahslen);
-                crypto_digest_digest(tcp_conn->rx_tfm, &sg, 1, (u8 *)&cdgst);
+                desc.tfm = tcp_conn->rx_tfm;
+                desc.flags = 0;
+                crypto_hash_digest(&desc, &sg, sg.length, (u8 *)&cdgst);
                 rdgst = *(uint32_t*)((char*)hdr + sizeof(struct iscsi_hdr) +
                                      ahslen);
                 if (cdgst != rdgst) {
@@ -673,7 +680,7 @@ partial_sg_digest_update(struct iscsi_tcp_conn *tcp_conn,
         memcpy(&temp, sg, sizeof(struct scatterlist));
         temp.offset = offset;
         temp.length = length;
-        crypto_digest_update(tcp_conn->data_rx_tfm, &temp, 1);
+        crypto_hash_update(&tcp_conn->data_rx_hash, &temp, length);
 }
 
 static void
@@ -682,7 +689,7 @@ iscsi_recv_digest_update(struct iscsi_tcp_conn *tcp_conn, char* buf, int len)
         struct scatterlist tmp;
 
         sg_init_one(&tmp, buf, len);
-        crypto_digest_update(tcp_conn->data_rx_tfm, &tmp, 1);
+        crypto_hash_update(&tcp_conn->data_rx_hash, &tmp, len);
 }
 
 static int iscsi_scsi_data_in(struct iscsi_conn *conn)
@@ -736,9 +743,9 @@ static int iscsi_scsi_data_in(struct iscsi_conn *conn)
                 if (!rc) {
                         if (conn->datadgst_en) {
                                 if (!offset)
-                                        crypto_digest_update(
-                                                        tcp_conn->data_rx_tfm,
-                                                        &sg[i], 1);
+                                        crypto_hash_update(
+                                                        &tcp_conn->data_rx_hash,
+                                                        &sg[i], sg[i].length);
                                 else
                                         partial_sg_digest_update(tcp_conn,
                                                         &sg[i],
@@ -877,8 +884,7 @@ more:
                 rc = iscsi_tcp_hdr_recv(conn);
                 if (!rc && tcp_conn->in.datalen) {
                         if (conn->datadgst_en) {
-                                BUG_ON(!tcp_conn->data_rx_tfm);
-                                crypto_digest_init(tcp_conn->data_rx_tfm);
+                                crypto_hash_init(&tcp_conn->data_rx_hash);
                         }
                         tcp_conn->in_progress = IN_PROGRESS_DATA_RECV;
                 } else if (rc) {
@@ -931,11 +937,11 @@ more:
                                           tcp_conn->in.padding);
                                 memset(pad, 0, tcp_conn->in.padding);
                                 sg_init_one(&sg, pad, tcp_conn->in.padding);
-                                crypto_digest_update(tcp_conn->data_rx_tfm,
-                                                     &sg, 1);
+                                crypto_hash_update(&tcp_conn->data_rx_hash,
+                                                   &sg, sg.length);
                         }
-                        crypto_digest_final(tcp_conn->data_rx_tfm,
-                                            (u8 *) & tcp_conn->in.datadgst);
+                        crypto_hash_final(&tcp_conn->data_rx_hash,
+                                          (u8 *)&tcp_conn->in.datadgst);
                         debug_tcp("rx digest 0x%x\n", tcp_conn->in.datadgst);
                         tcp_conn->in_progress = IN_PROGRESS_DDIGEST_RECV;
                 } else
@@ -1181,8 +1187,7 @@ iscsi_data_digest_init(struct iscsi_tcp_conn *tcp_conn,
 {
         struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
 
-        BUG_ON(!tcp_conn->data_tx_tfm);
-        crypto_digest_init(tcp_conn->data_tx_tfm);
+        crypto_hash_init(&tcp_conn->data_tx_hash);
         tcp_ctask->digest_count = 4;
 }
 
@@ -1196,7 +1201,7 @@ iscsi_digest_final_send(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
         int sent = 0;
 
         if (final)
-                crypto_digest_final(tcp_conn->data_tx_tfm, (u8*)digest);
+                crypto_hash_final(&tcp_conn->data_tx_hash, (u8 *)digest);
 
         iscsi_buf_init_iov(buf, (char*)digest, 4);
         rc = iscsi_sendpage(conn, buf, &tcp_ctask->digest_count, &sent);
@@ -1491,16 +1496,17 @@ handle_xmstate_imm_data(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
                 if (rc) {
                         tcp_ctask->xmstate |= XMSTATE_IMM_DATA;
                         if (conn->datadgst_en) {
-                                crypto_digest_final(tcp_conn->data_tx_tfm,
-                                                (u8*)&tcp_ctask->immdigest);
+                                crypto_hash_final(&tcp_conn->data_tx_hash,
+                                                  (u8 *)&tcp_ctask->immdigest);
                                 debug_tcp("tx imm sendpage fail 0x%x\n",
                                           tcp_ctask->datadigest);
                         }
                         return rc;
                 }
                 if (conn->datadgst_en)
-                        crypto_digest_update(tcp_conn->data_tx_tfm,
-                                             &tcp_ctask->sendbuf.sg, 1);
+                        crypto_hash_update(&tcp_conn->data_tx_hash,
+                                           &tcp_ctask->sendbuf.sg,
+                                           tcp_ctask->sendbuf.sg.length);
 
                 if (!ctask->imm_count)
                         break;
@@ -1577,8 +1583,8 @@ handle_xmstate_uns_data(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
                         tcp_ctask->xmstate |= XMSTATE_UNS_DATA;
                         /* will continue with this ctask later.. */
                         if (conn->datadgst_en) {
-                                crypto_digest_final(tcp_conn->data_tx_tfm,
-                                                (u8 *)&dtask->digest);
+                                crypto_hash_final(&tcp_conn->data_tx_hash,
+                                                  (u8 *)&dtask->digest);
                                 debug_tcp("tx uns data fail 0x%x\n",
                                           dtask->digest);
                         }
@@ -1593,8 +1599,9 @@ handle_xmstate_uns_data(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
                  * so pass it
                  */
                 if (conn->datadgst_en && tcp_ctask->sent - start > 0)
-                        crypto_digest_update(tcp_conn->data_tx_tfm,
-                                             &tcp_ctask->sendbuf.sg, 1);
+                        crypto_hash_update(&tcp_conn->data_tx_hash,
+                                           &tcp_ctask->sendbuf.sg,
+                                           tcp_ctask->sendbuf.sg.length);
 
                 if (!ctask->data_count)
                         break;
@@ -1668,7 +1675,7 @@ solicit_again:
                 tcp_ctask->xmstate |= XMSTATE_SOL_DATA;
                 /* will continue with this ctask later.. */
                 if (conn->datadgst_en) {
-                        crypto_digest_final(tcp_conn->data_tx_tfm,
+                        crypto_hash_final(&tcp_conn->data_tx_hash,
                                           (u8 *)&dtask->digest);
                         debug_tcp("r2t data send fail 0x%x\n", dtask->digest);
                 }
@@ -1677,8 +1684,8 @@ solicit_again:
 
         BUG_ON(r2t->data_count < 0);
         if (conn->datadgst_en)
-                crypto_digest_update(tcp_conn->data_tx_tfm, &r2t->sendbuf.sg,
-                                     1);
+                crypto_hash_update(&tcp_conn->data_tx_hash, &r2t->sendbuf.sg,
+                                   r2t->sendbuf.sg.length);
 
         if (r2t->data_count) {
                 BUG_ON(ctask->sc->use_sg == 0);
@@ -1766,8 +1773,9 @@ handle_xmstate_w_pad(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
         }
 
         if (conn->datadgst_en) {
-                crypto_digest_update(tcp_conn->data_tx_tfm,
-                                     &tcp_ctask->sendbuf.sg, 1);
+                crypto_hash_update(&tcp_conn->data_tx_hash,
+                                   &tcp_ctask->sendbuf.sg,
+                                   tcp_ctask->sendbuf.sg.length);
                 /* imm data? */
                 if (!dtask) {
                         rc = iscsi_digest_final_send(conn, ctask,
@@ -1963,13 +1971,13 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
         /* now free tcp_conn */
         if (digest) {
                 if (tcp_conn->tx_tfm)
-                        crypto_free_tfm(tcp_conn->tx_tfm);
+                        crypto_free_hash(tcp_conn->tx_tfm);
                 if (tcp_conn->rx_tfm)
-                        crypto_free_tfm(tcp_conn->rx_tfm);
-                if (tcp_conn->data_tx_tfm)
-                        crypto_free_tfm(tcp_conn->data_tx_tfm);
-                if (tcp_conn->data_rx_tfm)
-                        crypto_free_tfm(tcp_conn->data_rx_tfm);
+                        crypto_free_hash(tcp_conn->rx_tfm);
+                if (tcp_conn->data_tx_hash.tfm)
+                        crypto_free_hash(tcp_conn->data_tx_hash.tfm);
+                if (tcp_conn->data_rx_hash.tfm)
+                        crypto_free_hash(tcp_conn->data_rx_hash.tfm);
         }
 
         kfree(tcp_conn);
@@ -2130,44 +2138,48 @@ iscsi_conn_set_param(struct iscsi_cls_conn *cls_conn, enum iscsi_param param,
                 if (conn->hdrdgst_en) {
                         tcp_conn->hdr_size += sizeof(__u32);
                         if (!tcp_conn->tx_tfm)
-                                tcp_conn->tx_tfm = crypto_alloc_tfm("crc32c",
-                                                                    0);
-                        if (!tcp_conn->tx_tfm)
-                                return -ENOMEM;
+                                tcp_conn->tx_tfm =
+                                        crypto_alloc_hash("crc32c", 0,
+                                                          CRYPTO_ALG_ASYNC);
+                        if (IS_ERR(tcp_conn->tx_tfm))
+                                return PTR_ERR(tcp_conn->tx_tfm);
                         if (!tcp_conn->rx_tfm)
-                                tcp_conn->rx_tfm = crypto_alloc_tfm("crc32c",
-                                                                    0);
-                        if (!tcp_conn->rx_tfm) {
-                                crypto_free_tfm(tcp_conn->tx_tfm);
-                                return -ENOMEM;
+                                tcp_conn->rx_tfm =
+                                        crypto_alloc_hash("crc32c", 0,
+                                                          CRYPTO_ALG_ASYNC);
+                        if (IS_ERR(tcp_conn->rx_tfm)) {
+                                crypto_free_hash(tcp_conn->tx_tfm);
+                                return PTR_ERR(tcp_conn->rx_tfm);
                         }
                 } else {
                         if (tcp_conn->tx_tfm)
-                                crypto_free_tfm(tcp_conn->tx_tfm);
+                                crypto_free_hash(tcp_conn->tx_tfm);
                         if (tcp_conn->rx_tfm)
-                                crypto_free_tfm(tcp_conn->rx_tfm);
+                                crypto_free_hash(tcp_conn->rx_tfm);
                 }
                 break;
         case ISCSI_PARAM_DATADGST_EN:
                 iscsi_set_param(cls_conn, param, buf, buflen);
                 if (conn->datadgst_en) {
-                        if (!tcp_conn->data_tx_tfm)
-                                tcp_conn->data_tx_tfm =
-                                    crypto_alloc_tfm("crc32c", 0);
-                        if (!tcp_conn->data_tx_tfm)
-                                return -ENOMEM;
-                        if (!tcp_conn->data_rx_tfm)
-                                tcp_conn->data_rx_tfm =
-                                    crypto_alloc_tfm("crc32c", 0);
-                        if (!tcp_conn->data_rx_tfm) {
-                                crypto_free_tfm(tcp_conn->data_tx_tfm);
-                                return -ENOMEM;
+                        if (!tcp_conn->data_tx_hash.tfm)
+                                tcp_conn->data_tx_hash.tfm =
+                                    crypto_alloc_hash("crc32c", 0,
+                                                      CRYPTO_ALG_ASYNC);
+                        if (IS_ERR(tcp_conn->data_tx_hash.tfm))
+                                return PTR_ERR(tcp_conn->data_tx_hash.tfm);
+                        if (!tcp_conn->data_rx_hash.tfm)
+                                tcp_conn->data_rx_hash.tfm =
+                                    crypto_alloc_hash("crc32c", 0,
+                                                      CRYPTO_ALG_ASYNC);
+                        if (IS_ERR(tcp_conn->data_rx_hash.tfm)) {
+                                crypto_free_hash(tcp_conn->data_tx_hash.tfm);
+                                return PTR_ERR(tcp_conn->data_rx_hash.tfm);
                         }
                 } else {
-                        if (tcp_conn->data_tx_tfm)
-                                crypto_free_tfm(tcp_conn->data_tx_tfm);
-                        if (tcp_conn->data_rx_tfm)
-                                crypto_free_tfm(tcp_conn->data_rx_tfm);
+                        if (tcp_conn->data_tx_hash.tfm)
+                                crypto_free_hash(tcp_conn->data_tx_hash.tfm);
+                        if (tcp_conn->data_rx_hash.tfm)
+                                crypto_free_hash(tcp_conn->data_rx_hash.tfm);
                 }
                 tcp_conn->sendpage = conn->datadgst_en ?
                         sock_no_sendpage : tcp_conn->sock->ops->sendpage;
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index 6a4ee704e46e..e35701305fc9 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -51,6 +51,7 @@
 #define ISCSI_SG_TABLESIZE              SG_ALL
 #define ISCSI_TCP_MAX_CMD_LEN           16
 
+struct crypto_hash;
 struct socket;
 
 /* Socket connection recieve helper */
@@ -84,8 +85,8 @@ struct iscsi_tcp_conn {
         /* iSCSI connection-wide sequencing */
         int                     hdr_size;       /* PDU header size */
 
-        struct crypto_tfm       *rx_tfm;        /* CRC32C (Rx) */
-        struct crypto_tfm       *data_rx_tfm;   /* CRC32C (Rx) for data */
+        struct crypto_hash      *rx_tfm;        /* CRC32C (Rx) */
+        struct hash_desc        data_rx_hash;   /* CRC32C (Rx) for data */
 
         /* control data */
         struct iscsi_tcp_recv   in;             /* TCP receive context */
@@ -97,8 +98,8 @@ struct iscsi_tcp_conn {
         void                    (*old_write_space)(struct sock *);
 
         /* xmit */
-        struct crypto_tfm       *tx_tfm;        /* CRC32C (Tx) */
-        struct crypto_tfm       *data_tx_tfm;   /* CRC32C (Tx) for data */
+        struct crypto_hash      *tx_tfm;        /* CRC32C (Tx) */
+        struct hash_desc        data_tx_hash;   /* CRC32C (Tx) for data */
 
         /* MIB custom statistics */
         uint32_t                sendpage_failures_cnt;