staging: lustre: libcfs: calculate crypto performance using pages

Use alloc_page() and use cfs_crypto_hash_update_page()
to compute the hash instead of cfs_crypto_hash_digest(), since
tgt_checksum_bulk() computes the hash by page anyway.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5279
Reviewed-on: http://review.whamcloud.com/10982
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Alexander Boyko <alexander_boyko@xyratex.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c
index aec7916..f8383dc 100644 (file)
--- a/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c
@@ -330,8 +330,23 @@ static void cfs_crypto_performance_test(enum cfs_crypto_hash_alg hash_alg)
 
        for (start = jiffies, end = start + sec * HZ, bcount = 0;
             time_before(jiffies, end); bcount++) {
-               err = cfs_crypto_hash_digest(hash_alg, buf, buf_len, NULL, 0,
-                                            hash, &hash_len);
+               struct cfs_crypto_hash_desc *hdesc;
+               int i;
+
+               hdesc = cfs_crypto_hash_init(hash_alg, NULL, 0);
+               if (IS_ERR(hdesc)) {
+                       err = PTR_ERR(hdesc);
+                       break;
+               }
+
+               for (i = 0; i < buf_len / PAGE_SIZE; i++) {
+                       err = cfs_crypto_hash_update_page(hdesc, page, 0,
+                                                         PAGE_SIZE);
+                       if (err)
+                               break;
+               }
+
+               err = cfs_crypto_hash_final(hdesc, hash, &hash_len);
                if (err)
                        break;
        }