Multiple files: calloc -> malloc

xlators/storage/posix/src/posix-inode-fd-ops.c:
xlators/storage/posix/src/posix-helpers.c:
xlators/storage/bd/src/bd.c:
xlators/protocol/client/src/client-lk.c:
xlators/performance/quick-read/src/quick-read.c:
xlators/performance/io-cache/src/page.c
xlators/nfs/server/src/nfs3-helpers.c
xlators/nfs/server/src/nfs-fops.c
xlators/nfs/server/src/mount3udp_svc.c
xlators/nfs/server/src/mount3.c
xlators/mount/fuse/src/fuse-helpers.c
xlators/mount/fuse/src/fuse-bridge.c
xlators/mgmt/glusterd/src/glusterd-utils.c
xlators/mgmt/glusterd/src/glusterd-syncop.h
xlators/mgmt/glusterd/src/glusterd-snapshot.c
xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
xlators/mgmt/glusterd/src/glusterd-replace-brick.c
xlators/mgmt/glusterd/src/glusterd-op-sm.c
xlators/mgmt/glusterd/src/glusterd-mgmt.c
xlators/meta/src/subvolumes-dir.c
xlators/meta/src/graph-dir.c
xlators/features/trash/src/trash.c
xlators/features/shard/src/shard.h
xlators/features/shard/src/shard.c
xlators/features/marker/src/marker-quota.c
xlators/features/locks/src/common.c
xlators/features/leases/src/leases-internal.c
xlators/features/gfid-access/src/gfid-access.c
xlators/features/cloudsync/src/cloudsync-plugins/src/cloudsyncs3/src/libcloudsyncs3.c
xlators/features/bit-rot/src/bitd/bit-rot.c
xlators/features/bit-rot/src/bitd/bit-rot-scrub.c
bxlators/encryption/crypt/src/metadata.c
xlators/encryption/crypt/src/crypt.c
xlators/performance/md-cache/src/md-cache.c:

Move to GF_MALLOC() instead of GF_CALLOC() when possible

It doesn't make sense to calloc (allocate and clear) memory
when the code right away fills that memory with data.
It may be optimized by the compiler, or have a microscopic
performance improvement.

In some cases, also changed allocation size to be sizeof some
struct or type instead of a pointer - easier to read.
In some cases, removed redundant strlen() calls by saving the result
into a variable.

1. Only done for the straightforward cases. There's room for improvement.
2. Please review carefully, especially for string allocation, with the
terminating NULL string.

Only compile-tested!

.. and allocate memory as much as needed.

xlators/nfs/server/src/mount3.c :

Don't blindly allocate PATH_MAX, but strlen() the string and allocate
appropriately.
Also, align error messges.

updates: bz#1193929
Original-Author: Yaniv Kaul <ykaul@redhat.com>
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>
Change-Id: Ibda6f33dd180b7f7694f20a12af1e9576fe197f5

34 files changed, 141 insertions, 129 deletions

diff --git a/xlators/encryption/crypt/src/crypt.c b/xlators/encryption/crypt/src/crypt.c
index f6e1823ce66..93d64c82a9e 100644
--- a/xlators/encryption/crypt/src/crypt.c
+++ b/xlators/encryption/crypt/src/crypt.c
@@ -43,7 +43,7 @@ static crypt_local_t *crypt_alloc_local(call_frame_t *frame, xlator_t *this,
 {
 	crypt_local_t *local = NULL;
 
-	local = GF_CALLOC (1, sizeof (*local), gf_crypt_mt_local);
+	local = GF_CALLOC (1, sizeof (crypt_local_t), gf_crypt_mt_local);
 	if (!local) {
 		gf_log(this->name, GF_LOG_ERROR, "out of memory");
 		return NULL;
@@ -92,7 +92,7 @@ static struct crypt_inode_info *alloc_inode_info(crypt_local_t *local,
 {
 	struct crypt_inode_info *info;
 
-	info = GF_CALLOC(1, sizeof(*info), gf_crypt_mt_inode);
+	info = GF_CALLOC(1, sizeof(struct crypt_inode_info), gf_crypt_mt_inode);
 	if (!info) {
 		local->op_ret = -1;
 		local->op_errno = ENOMEM;
@@ -100,9 +100,8 @@ static struct crypt_inode_info *alloc_inode_info(crypt_local_t *local,
 			"Can not allocate inode info");
 		return NULL;
 	}
-	memset(info, 0, sizeof(*info));
 #if DEBUG_CRYPT
-	info->loc = GF_CALLOC(1, sizeof(*loc), gf_crypt_mt_loc);
+	info->loc = GF_CALLOC(1, sizeof(loc_t), gf_crypt_mt_loc);
 	if (!info->loc) {
 		gf_log("crypt", GF_LOG_WARNING, "Can not allocate loc");
 		GF_FREE(info);
@@ -2181,12 +2180,11 @@ static int32_t crypt_open(call_frame_t *frame,
 	local = crypt_alloc_local(frame, this, GF_FOP_OPEN);
 	if (!local)
 		goto error;
-	local->loc = GF_CALLOC(1, sizeof(*loc), gf_crypt_mt_loc);
+	local->loc = GF_CALLOC(1, sizeof(loc_t), gf_crypt_mt_loc);
 	if (!local->loc) {
 		ret = ENOMEM;
 		goto error;
 	}
-	memset(local->loc, 0, sizeof(*local->loc));
 	ret = loc_copy(local->loc, loc);
 	if (ret) {
 		GF_FREE(local->loc);
@@ -3261,10 +3259,9 @@ static int32_t linkop_grab_local(call_frame_t *frame,
 	}
 	local->fd = fd;
 	local->flags = flags;
-	local->loc = GF_CALLOC(1, sizeof(*oldloc), gf_crypt_mt_loc);
+	local->loc = GF_CALLOC(1, sizeof(loc_t), gf_crypt_mt_loc);
 	if (!local->loc)
 		goto error;
-	memset(local->loc, 0, sizeof(*local->loc));
 	ret = loc_copy(local->loc, oldloc);
 	if (ret) {
 		GF_FREE(local->loc);
@@ -3272,13 +3269,12 @@ static int32_t linkop_grab_local(call_frame_t *frame,
 		goto error;
 	}
 	if (newloc) {
-		local->newloc = GF_CALLOC(1, sizeof(*newloc), gf_crypt_mt_loc);
+		local->newloc = GF_CALLOC(1, sizeof(loc_t), gf_crypt_mt_loc);
 		if (!local->newloc) {
 			loc_wipe(local->loc);
 			GF_FREE(local->loc);
 			goto error;
 		}
-		memset(local->newloc, 0, sizeof(*local->newloc));
 		ret = loc_copy(local->newloc, newloc);
 		if (ret) {
 			loc_wipe(local->loc);
@@ -3971,10 +3967,9 @@ static int32_t crypt_stat(call_frame_t *frame,
 	local = crypt_alloc_local(frame, this, GF_FOP_STAT);
 	if (!local)
 		goto error;
-	local->loc = GF_CALLOC(1, sizeof(*loc), gf_crypt_mt_loc);
+	local->loc = GF_CALLOC(1, sizeof(loc_t), gf_crypt_mt_loc);
 	if (!local->loc)
 		goto error;
-	memset(local->loc, 0, sizeof(*local->loc));
 	ret = loc_copy(local->loc, loc);
 	if (ret) {
 		GF_FREE(local->loc);
@@ -4052,10 +4047,9 @@ static int32_t crypt_lookup(call_frame_t *frame,
 	local = crypt_alloc_local(frame, this, GF_FOP_LOOKUP);
 	if (!local)
 		goto error;
-	local->loc = GF_CALLOC(1, sizeof(*loc), gf_crypt_mt_loc);
+	local->loc = GF_CALLOC(1, sizeof(loc_t), gf_crypt_mt_loc);
 	if (!local->loc)
 		goto error;
-	memset(local->loc, 0, sizeof(*local->loc));
 	ret = loc_copy(local->loc, loc);
 	if (ret) {
 		GF_FREE(local->loc);
diff --git a/xlators/encryption/crypt/src/metadata.c b/xlators/encryption/crypt/src/metadata.c
index cd2bb7dda5d..96fe7d64e21 100644
--- a/xlators/encryption/crypt/src/metadata.c
+++ b/xlators/encryption/crypt/src/metadata.c
@@ -483,7 +483,7 @@ static int32_t open_format_v1(unsigned char *wire,
 		/* the case of partial open */
 		return 0;
 
-	fmt = GF_CALLOC(1, len, gf_crypt_mt_mtd);
+	fmt = GF_MALLOC(len, gf_crypt_mt_mtd);
 	if (!fmt)
 		return ENOMEM;
 	memcpy(fmt, wire, len);
diff --git a/xlators/features/bit-rot/src/bitd/bit-rot-scrub.c b/xlators/features/bit-rot/src/bitd/bit-rot-scrub.c
index 8e432aee645..e2665acab98 100644
--- a/xlators/features/bit-rot/src/bitd/bit-rot-scrub.c
+++ b/xlators/features/bit-rot/src/bitd/bit-rot-scrub.c
@@ -127,7 +127,7 @@ bitd_scrub_post_compute_check (xlator_t *this,
         }
 
         signlen = signptr->signaturelen;
-        *signature = GF_CALLOC (1, sizeof (br_isignature_out_t) + signlen,
+        *signature = GF_MALLOC (sizeof (br_isignature_out_t) + signlen,
                                 gf_common_mt_char);
 
         (void) memcpy (*signature, signptr,
@@ -389,8 +389,7 @@ br_scrubber_scrub_begin (xlator_t *this, struct br_fsscan_entry *fsentry)
                 goto unrefd; /* skip this object */
 
         /* if all's good, proceed to calculate the hash */
-        md = GF_CALLOC (SHA256_DIGEST_LENGTH, sizeof (*md),
-                        gf_common_mt_char);
+        md = GF_MALLOC (SHA256_DIGEST_LENGTH, gf_common_mt_char);
         if (!md)
                 goto unrefd;
 
diff --git a/xlators/features/bit-rot/src/bitd/bit-rot.c b/xlators/features/bit-rot/src/bitd/bit-rot.c
index 66e58948fa9..cf59232263b 100644
--- a/xlators/features/bit-rot/src/bitd/bit-rot.c
+++ b/xlators/features/bit-rot/src/bitd/bit-rot.c
@@ -393,7 +393,7 @@ br_object_read_sign (inode_t *linked_inode, fd_t *fd, br_object_t *object,
 
         this = object->this;
 
-        md = GF_CALLOC (SHA256_DIGEST_LENGTH, sizeof (*md), gf_common_mt_char);
+        md = GF_MALLOC (SHA256_DIGEST_LENGTH, gf_common_mt_char);
         if (!md) {
                 gf_msg (this->name, GF_LOG_ERROR, ENOMEM, BRB_MSG_NO_MEMORY,
                         "failed to allocate memory for saving hash of the "
diff --git a/xlators/features/cloudsync/src/cloudsync-plugins/src/cloudsyncs3/src/libcloudsyncs3.c b/xlators/features/cloudsync/src/cloudsync-plugins/src/cloudsyncs3/src/libcloudsyncs3.c
index dc6a598fa81..e36bf71e4ae 100644
--- a/xlators/features/cloudsync/src/cloudsync-plugins/src/cloudsyncs3/src/libcloudsyncs3.c
+++ b/xlators/features/cloudsync/src/cloudsync-plugins/src/cloudsyncs3/src/libcloudsyncs3.c
@@ -298,7 +298,7 @@ aws_b64_encode(const unsigned char *input, int length)
         BIO_flush(b64);
         BIO_get_mem_ptr(b64, &bptr);
 
-        buff = GF_CALLOC(1, (bptr->length), gf_common_mt_char);
+        buff = GF_MALLOC(bptr->length, gf_common_mt_char);
         memcpy(buff, bptr->data, bptr->length - 1);
         buff[bptr->length - 1] = 0;
 
diff --git a/xlators/features/gfid-access/src/gfid-access.c b/xlators/features/gfid-access/src/gfid-access.c
index 0a82321ed3c..79c2ee911cd 100644
--- a/xlators/features/gfid-access/src/gfid-access.c
+++ b/xlators/features/gfid-access/src/gfid-access.c
@@ -140,7 +140,7 @@ ga_newfile_parse_args (xlator_t *this, data_t *data)
                 goto err;
         }
 
-        args->bname = GF_CALLOC (1, (len + 1), gf_common_mt_char);
+        args->bname = GF_MALLOC (len + 1, gf_common_mt_char);
         if (args->bname == NULL)
                 goto err;
 
@@ -181,7 +181,7 @@ ga_newfile_parse_args (xlator_t *this, data_t *data)
                                 args->gfid);
                         goto err;
                 }
-                args->args.symlink.linkpath = GF_CALLOC (1, len + 1,
+                args->args.symlink.linkpath = GF_MALLOC (len + 1,
                                                          gf_common_mt_char);
                 if (args->args.symlink.linkpath == NULL)
                         goto err;
@@ -265,11 +265,12 @@ ga_heal_parse_args (xlator_t *this, data_t *data)
         if (len == blob_len)
                 goto err;
 
-        args->bname = GF_CALLOC (1, len + 1, gf_common_mt_char);
+        args->bname = GF_MALLOC (len + 1, gf_common_mt_char);
         if (!args->bname)
                 goto err;
 
         memcpy (args->bname, blob, len);
+        args->bname[len] = '\0';
         blob_len -= (len + 1);
 
         if (blob_len)
@@ -318,7 +319,7 @@ ga_fill_tmp_loc (loc_t *loc, xlator_t *this, uuid_t gfid,
                         new_loc->name++;
         }
 
-        gfid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        gfid_ptr = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!gfid_ptr) {
                 ret = -1;
                 goto out;
diff --git a/xlators/features/leases/src/leases-internal.c b/xlators/features/leases/src/leases-internal.c
index 475576eac79..fd0996e3943 100644
--- a/xlators/features/leases/src/leases-internal.c
+++ b/xlators/features/leases/src/leases-internal.c
@@ -900,7 +900,7 @@ __recall_lease (xlator_t *this, lease_inode_ctx_t *lease_ctx)
         if (!timer) {
                 goto out;
         }
-        timer_data = GF_CALLOC (1, sizeof (*timer_data),
+        timer_data = GF_MALLOC (sizeof (lease_timer_data_t),
                                 gf_leases_mt_timer_data_t);
         if (!timer_data) {
                 GF_FREE (timer);
diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c
index 324187a4a7a..b4d8aa37219 100644
--- a/xlators/features/locks/src/common.c
+++ b/xlators/features/locks/src/common.c
@@ -521,7 +521,7 @@ __copy_lock(posix_lock_t *src)
 {
         posix_lock_t *dst;
 
-        dst = GF_CALLOC(1, sizeof(posix_lock_t), gf_locks_mt_posix_lock_t);
+        dst = GF_MALLOC(sizeof(posix_lock_t), gf_locks_mt_posix_lock_t);
         if (dst != NULL) {
                 memcpy (dst, src, sizeof(posix_lock_t));
                 dst->client_uid = gf_strdup(src->client_uid);
diff --git a/xlators/features/marker/src/marker-quota.c b/xlators/features/marker/src/marker-quota.c
index 620201d616e..6d3c5eaec23 100644
--- a/xlators/features/marker/src/marker-quota.c
+++ b/xlators/features/marker/src/marker-quota.c
@@ -332,7 +332,7 @@ quota_dict_set_size_meta (xlator_t *this, dict_t *dict,
         quota_meta_t   *value                      = NULL;
         char            size_key[QUOTA_KEY_MAX]    = {0, };
 
-        value = GF_CALLOC (2, sizeof (quota_meta_t), gf_common_quota_meta_t);
+        value = GF_MALLOC (2 * sizeof (quota_meta_t), gf_common_quota_meta_t);
         if (value == NULL) {
                 goto out;
         }
diff --git a/xlators/features/shard/src/shard.c b/xlators/features/shard/src/shard.c
index 6c075ac5bf7..a12e553f95f 100644
--- a/xlators/features/shard/src/shard.c
+++ b/xlators/features/shard/src/shard.c
@@ -1357,7 +1357,7 @@ shard_lookup_internal_dir (call_frame_t *frame, xlator_t *this,
         priv = this->private;
         local->post_res_handler = post_res_handler;
 
-        gfid = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        gfid = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!gfid)
                 goto err;
 
@@ -1378,6 +1378,7 @@ shard_lookup_internal_dir (call_frame_t *frame, xlator_t *this,
                 loc = &local->dot_shard_rm_loc;
                 break;
         default:
+                bzero(*gfid, sizeof(uuid_t));
                 break;
         }
 
@@ -2266,7 +2267,7 @@ shard_create_gfid_dict (dict_t *dict)
         if (!new)
                 return NULL;
 
-        gfid = GF_CALLOC (1, sizeof (uuid_t), gf_common_mt_char);
+        gfid = GF_MALLOC (sizeof (uuid_t), gf_common_mt_char);
         if (!gfid) {
                 ret = -1;
                 goto out;
@@ -5615,7 +5616,7 @@ shard_mkdir_internal_dir (call_frame_t *frame, xlator_t *this,
         priv = this->private;
 
         local->post_res_handler = handler;
-        gfid = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        gfid = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!gfid)
                 goto err;
 
@@ -5629,6 +5630,7 @@ shard_mkdir_internal_dir (call_frame_t *frame, xlator_t *this,
                 loc = &local->dot_shard_rm_loc;
                 break;
         default:
+                bzero(*gfid, sizeof(uuid_t));
                 break;
         }
 
diff --git a/xlators/features/shard/src/shard.h b/xlators/features/shard/src/shard.h
index ac3813c8c50..7a263f4c37b 100644
--- a/xlators/features/shard/src/shard.h
+++ b/xlators/features/shard/src/shard.h
@@ -120,7 +120,7 @@ shard_unlock_entrylk (call_frame_t *frame, xlator_t *this);
         int64_t       *__size_attr = NULL;                                    \
         uint64_t      *__bs        = 0;                                       \
                                                                               \
-        __bs = GF_CALLOC (1, sizeof (uint64_t), gf_shard_mt_uint64_t);        \
+        __bs = GF_MALLOC (sizeof (uint64_t), gf_shard_mt_uint64_t);           \
         if (!__bs)                                                            \
                 goto label;                                                   \
         *__bs = hton64 (block_size);                                          \
@@ -142,8 +142,8 @@ shard_unlock_entrylk (call_frame_t *frame, xlator_t *this);
                               __size_attr, 8 * 4);                            \
         if (__ret) {                                                          \
                 gf_msg (this->name, GF_LOG_WARNING, 0,                        \
-                        SHARD_MSG_DICT_OP_FAILED, "Failed to set key: %s "   \
-                        "on path %s", GF_XATTR_SHARD_FILE_SIZE, (loc)->path);   \
+                        SHARD_MSG_DICT_OP_FAILED, "Failed to set key: %s "    \
+                        "on path %s", GF_XATTR_SHARD_FILE_SIZE, (loc)->path); \
                 GF_FREE (__size_attr);                                        \
                 goto label;                                                   \
         }                                                                     \
diff --git a/xlators/features/trash/src/trash.c b/xlators/features/trash/src/trash.c
index a59b186add1..9e429e38fe7 100644
--- a/xlators/features/trash/src/trash.c
+++ b/xlators/features/trash/src/trash.c
@@ -485,8 +485,7 @@ trash_dir_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (!data) {
                 goto out;
         }
-        priv->oldtrash_dir = GF_CALLOC (1, PATH_MAX,
-                                        gf_common_mt_char);
+        priv->oldtrash_dir = GF_MALLOC (PATH_MAX, gf_common_mt_char);
         if (!priv->oldtrash_dir) {
                 gf_log (this->name, GF_LOG_ERROR, "out of memory");
                  ret = ENOMEM;
@@ -541,7 +540,7 @@ trash_internalop_dir_lookup_cbk (call_frame_t *frame, void *cookie,
         local = frame->local;
         if (op_ret != 0 && op_errno == ENOENT) {
                 loc_wipe (&local->loc);
-                gfid_ptr = GF_CALLOC (1, sizeof(uuid_t),
+                gfid_ptr = GF_MALLOC (sizeof(uuid_t),
                                    gf_common_mt_uuid_t);
                 if (!gfid_ptr) {
                         ret = ENOMEM;
@@ -657,7 +656,7 @@ trash_dir_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                                    "directory %s ",
                                    priv->newtrash_dir);
 
-                gfid_ptr = GF_CALLOC (1, sizeof(uuid_t),
+                gfid_ptr = GF_MALLOC (sizeof(uuid_t),
                                           gf_common_mt_uuid_t);
                 if (!gfid_ptr) {
                         ret = ENOMEM;
diff --git a/xlators/meta/src/graph-dir.c b/xlators/meta/src/graph-dir.c
index 541e806ddb5..c3a6e8b78e1 100644
--- a/xlators/meta/src/graph-dir.c
+++ b/xlators/meta/src/graph-dir.c
@@ -45,7 +45,7 @@ graph_dir_fill (xlator_t *this, inode_t *inode, struct meta_dirent **dp)
 	for (xl = graph->first; xl; xl = xl->next)
 		count++;
 
-	dirents = GF_CALLOC (sizeof (*dirents), count, gf_meta_mt_dirents_t);
+	dirents = GF_MALLOC (sizeof (*dirents) * count, gf_meta_mt_dirents_t);
 	if (!dirents)
 		return -1;
 
diff --git a/xlators/meta/src/subvolumes-dir.c b/xlators/meta/src/subvolumes-dir.c
index 00218b1a8ec..59db75e260f 100644
--- a/xlators/meta/src/subvolumes-dir.c
+++ b/xlators/meta/src/subvolumes-dir.c
@@ -30,7 +30,7 @@ subvolumes_dir_fill (xlator_t *this, inode_t *dir, struct meta_dirent **dp)
 	for (subv = xl->children; subv; subv = subv->next)
 		count++;
 
-	dirents = GF_CALLOC (sizeof (*dirents), count, gf_meta_mt_dirents_t);
+	dirents = GF_MALLOC (sizeof (*dirents) * count, gf_meta_mt_dirents_t);
 	if (!dirents)
 		return -1;
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-mgmt.c b/xlators/mgmt/glusterd/src/glusterd-mgmt.c
index 5b7d782a1e6..a924dd3425b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-mgmt.c
+++ b/xlators/mgmt/glusterd/src/glusterd-mgmt.c
@@ -2180,7 +2180,7 @@ glusterd_mgmt_v3_initiate_all_phases (rpcsvc_request_t *req, glusterd_op_t op,
         /* Save the MY_UUID as the originator_uuid. This originator_uuid
          * will be used by is_origin_glusterd() to determine if a node
          * is the originator node for a command. */
-        originator_uuid = GF_CALLOC (1, sizeof(uuid_t),
+        originator_uuid = GF_MALLOC (sizeof(uuid_t),
                                      gf_common_mt_uuid_t);
         if (!originator_uuid) {
                 ret = -1;
@@ -2416,7 +2416,7 @@ glusterd_mgmt_v3_initiate_snap_phases (rpcsvc_request_t *req, glusterd_op_t op,
         /* Save the MY_UUID as the originator_uuid. This originator_uuid
          * will be used by is_origin_glusterd() to determine if a node
          * is the originator node for a command. */
-        originator_uuid = GF_CALLOC (1, sizeof(uuid_t),
+        originator_uuid = GF_MALLOC (sizeof(uuid_t),
                                      gf_common_mt_uuid_t);
         if (!originator_uuid) {
                 ret = -1;
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index cd2c364464d..551672c1d74 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -189,7 +189,7 @@ glusterd_generate_txn_id (dict_t *dict, uuid_t **txn_id)
         GF_ASSERT (priv);
         GF_ASSERT (dict);
 
-        *txn_id = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        *txn_id = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!*txn_id)
                 goto out;
 
@@ -1421,8 +1421,7 @@ glusterd_op_stage_set_volume (dict_t *dict, char **op_errstr)
                                 if (!gf_uuid_compare (brickinfo->uuid, MY_UUID)) {
                                         trash_path_len = strlen (value) +
                                                    strlen (brickinfo->path) + 2;
-                                        trash_path = GF_CALLOC (1,
-                                                     trash_path_len,
+                                        trash_path = GF_MALLOC (trash_path_len,
                                                      gf_common_mt_char);
                                         snprintf (trash_path, trash_path_len,
                                                   "%s/%s", brickinfo->path,
@@ -5889,7 +5888,7 @@ glusterd_op_ac_stage_op (glusterd_op_sm_event_t *event, void *ctx)
                         status);
         }
 
-        txn_id = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        txn_id = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
 
         if (txn_id)
                 gf_uuid_copy (*txn_id, event->txn_id);
@@ -6010,7 +6009,7 @@ glusterd_op_ac_commit_op (glusterd_op_sm_event_t *event, void *ctx)
                         "'Volume %s' failed: %d", gd_op_list[req_ctx->op],
                         status);
 
-        txn_id = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        txn_id = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
 
         if (txn_id)
                 gf_uuid_copy (*txn_id, event->txn_id);
diff --git a/xlators/mgmt/glusterd/src/glusterd-replace-brick.c b/xlators/mgmt/glusterd/src/glusterd-replace-brick.c
index de8663fdcb4..c3c7d7230d7 100644
--- a/xlators/mgmt/glusterd/src/glusterd-replace-brick.c
+++ b/xlators/mgmt/glusterd/src/glusterd-replace-brick.c
@@ -604,7 +604,7 @@ glusterd_mgmt_v3_initiate_replace_brick_cmd_phases (rpcsvc_request_t *req,
         GF_ASSERT (conf);
 
         txn_generation = conf->generation;
-        originator_uuid = GF_CALLOC (1, sizeof(uuid_t),
+        originator_uuid = GF_MALLOC (sizeof(uuid_t),
                                      gf_common_mt_uuid_t);
         if (!originator_uuid) {
                 ret = -1;
diff --git a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
index fc859c00a9d..be5979cf858 100644
--- a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
+++ b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
@@ -1829,7 +1829,7 @@ glusterd_mgmt_v3_lock_peers (call_frame_t *frame, xlator_t *this,
                 ret = -1;
                 goto out;
         }
-        frame->cookie = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        frame->cookie = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!frame->cookie) {
                 ret = -1;
                 goto out;
@@ -1910,7 +1910,7 @@ glusterd_mgmt_v3_unlock_peers (call_frame_t *frame, xlator_t *this,
                 ret = -1;
                 goto out;
         }
-        frame->cookie = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        frame->cookie = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!frame->cookie) {
                 ret = -1;
                 goto out;
@@ -2033,7 +2033,7 @@ glusterd_stage_op (call_frame_t *frame, xlator_t *this,
                 ret = -1;
                 goto out;
         }
-        frame->cookie = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        frame->cookie = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!frame->cookie) {
                 ret = -1;
                 goto out;
@@ -2114,7 +2114,7 @@ glusterd_commit_op (call_frame_t *frame, xlator_t *this,
                 ret = -1;
                 goto out;
         }
-        frame->cookie = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        frame->cookie = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!frame->cookie) {
                 ret = -1;
                 goto out;
diff --git a/xlators/mgmt/glusterd/src/glusterd-snapshot.c b/xlators/mgmt/glusterd/src/glusterd-snapshot.c
index 1f292ae405c..5d0e15ade02 100644
--- a/xlators/mgmt/glusterd/src/glusterd-snapshot.c
+++ b/xlators/mgmt/glusterd/src/glusterd-snapshot.c
@@ -4160,7 +4160,7 @@ glusterd_handle_snapshot_create (rpcsvc_request_t *req, glusterd_op_t op,
                 goto out;
         }
 
-        uuid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        uuid_ptr = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!uuid_ptr) {
                 gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                         GD_MSG_NO_MEMORY, "Out Of Memory");
@@ -4213,7 +4213,7 @@ glusterd_handle_snapshot_create (rpcsvc_request_t *req, glusterd_op_t op,
                         goto out;
                 }
 
-                uuid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+                uuid_ptr = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
                 if (!uuid_ptr) {
                         gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                                 GD_MSG_NO_MEMORY, "Out Of Memory");
@@ -4359,7 +4359,7 @@ glusterd_handle_snapshot_clone (rpcsvc_request_t *req, glusterd_op_t op,
                 goto out;
         }
 
-        uuid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        uuid_ptr = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!uuid_ptr) {
                 gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                         GD_MSG_NO_MEMORY, "Out Of Memory");
@@ -4411,7 +4411,7 @@ glusterd_handle_snapshot_clone (rpcsvc_request_t *req, glusterd_op_t op,
                 goto out;
         }
 
-        uuid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t);
+        uuid_ptr = GF_MALLOC (sizeof(uuid_t), gf_common_mt_uuid_t);
         if (!uuid_ptr) {
                 gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                         GD_MSG_NO_MEMORY, "Out Of Memory");
diff --git a/xlators/mgmt/glusterd/src/glusterd-syncop.h b/xlators/mgmt/glusterd/src/glusterd-syncop.h
index 6c5fbf965e6..e5f3aa6304c 100644
--- a/xlators/mgmt/glusterd/src/glusterd-syncop.h
+++ b/xlators/mgmt/glusterd/src/glusterd-syncop.h
@@ -40,7 +40,7 @@
         } while (0)
 
 #define GD_ALLOC_COPY_UUID(dst_ptr, uuid, ret) do {                            \
-        dst_ptr = GF_CALLOC (1, sizeof (*dst_ptr), gf_common_mt_uuid_t);       \
+        dst_ptr = GF_MALLOC (sizeof (*dst_ptr), gf_common_mt_uuid_t);       \
         if (dst_ptr) {                                                         \
                 gf_uuid_copy (*dst_ptr, uuid);                                 \
                 ret = 0;                                                       \
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index 51c81db2f35..612fa35f90b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -9685,7 +9685,7 @@ glusterd_append_status_dicts (dict_t *dst, dict_t *src)
                 if (ret)
                         goto out;
 
-                dst_sts_val = GF_CALLOC (1, sizeof(gf_gsync_status_t),
+                dst_sts_val = GF_MALLOC (sizeof(gf_gsync_status_t),
                                          gf_common_mt_gsync_status_t);
                 if (!dst_sts_val) {
                         gf_msg ("glusterd", GF_LOG_ERROR, ENOMEM,
@@ -12194,7 +12194,7 @@ glusterd_set_originator_uuid (dict_t *dict)
 
         GF_ASSERT (dict);
 
-        originator_uuid = GF_CALLOC (1, sizeof(uuid_t),
+        originator_uuid = GF_MALLOC (sizeof(uuid_t),
                                      gf_common_mt_uuid_t);
         if (!originator_uuid) {
                 ret = -1;
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index ee50329f03b..29bb80ac715 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -3637,13 +3637,14 @@ fuse_getxattr_resume (fuse_state_t *state)
             (strcmp (state->name, VIRTUAL_GFID_XATTR_KEY) == 0)) {
                 /* send glusterfs gfid in binary form */
 
-                value = GF_CALLOC (16 + 1, sizeof(char),
+                value = GF_MALLOC (16 + 1,
                                    gf_common_mt_char);
                 if (!value) {
                         send_fuse_err (state->this, state->finh, ENOMEM);
                         goto internal_out;
                 }
                 memcpy (value, state->loc.inode->gfid, 16);
+                value[16] = '\0';
 
                 send_fuse_xattr (THIS, state->finh, value, 16, state->size);
                 GF_FREE (value);
diff --git a/xlators/mount/fuse/src/fuse-helpers.c b/xlators/mount/fuse/src/fuse-helpers.c
index cb3e081e62e..a4e80b385dd 100644
--- a/xlators/mount/fuse/src/fuse-helpers.c
+++ b/xlators/mount/fuse/src/fuse-helpers.c
@@ -550,7 +550,8 @@ fuse_do_flip_xattr_ns (char *okey, const char *nns, char **nkey)
         okey = strchr (okey, '.');
         GF_ASSERT (okey);
 
-        key = GF_CALLOC (1, strlen (nns) + strlen(okey) + 1,
+        int key_len = strlen (nns) + strlen(okey);
+        key = GF_MALLOC (key_len + 1,
                          gf_common_mt_char);
         if (!key) {
                 ret = -1;
diff --git a/xlators/nfs/server/src/mount3.c b/xlators/nfs/server/src/mount3.c
index 187c975081d..f3d7def64d0 100644
--- a/xlators/nfs/server/src/mount3.c
+++ b/xlators/nfs/server/src/mount3.c
@@ -761,6 +761,7 @@ mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
         char                    *path = NULL;
         uuid_t                  mountid = {1, };
         char                    fhstr[1536];
+        int                     alloclen = 0;
 
         req = (rpcsvc_request_t *)frame->local;
 
@@ -786,14 +787,16 @@ mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
         if (status != MNT3_OK)
                 goto xmit_res;
 
-        path = GF_CALLOC (PATH_MAX, sizeof (char), gf_nfs_mt_char);
+        alloclen = strlen(mntxl->name) + 2;
+        path = GF_MALLOC (alloclen, gf_nfs_mt_char);
         if (!path) {
-                gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM, NFS_MSG_NO_MEMORY,
-                        "Out of memory");
+                gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
+                        NFS_MSG_NO_MEMORY,
+                        "Memory allocation failed.");
                 goto xmit_res;
         }
 
-        snprintf (path, PATH_MAX, "/%s", mntxl->name);
+        snprintf (path, alloclen, "/%s", mntxl->name);
         mnt3svc_update_mountlist (ms, req, path, NULL);
         GF_FREE (path);
         if (gf_nfs_dvm_off (nfs_state (ms->nfsx))) {
@@ -1148,18 +1151,19 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
         nfs3_fh_build_child_fh (&mres->parentfh, buf, &fh);
         if (strlen (mres->remainingdir) <= 0) {
-                size_t alloclen;
+                int alloclen;
                 op_ret = -1;
                 mntstat = MNT3_OK;
 
                 /* Construct the full path */
+                int resolveloc_path_len = strlen(mres->resolveloc.path);
                 alloclen = strlen (mres->exp->expname) +
-                                   strlen (mres->resolveloc.path) + 1;
-                mres->exp->fullpath = GF_CALLOC (alloclen, sizeof (char),
-                                                gf_nfs_mt_char);
+                                   resolveloc_path_len + 1;
+                mres->exp->fullpath = GF_MALLOC (alloclen, gf_nfs_mt_char);
                 if (!mres->exp->fullpath) {
-                        gf_msg (GF_MNT, GF_LOG_CRITICAL, ENOMEM,
-                                NFS_MSG_NO_MEMORY, "Allocation failed.");
+                        gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
+                                NFS_MSG_NO_MEMORY,
+                                "Memory allocation failed.");
                         goto err;
                 }
                 snprintf (mres->exp->fullpath, alloclen, "%s%s",
@@ -1178,7 +1182,9 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         goto err;
                 }
 
-                path = GF_CALLOC (PATH_MAX, sizeof (char), gf_nfs_mt_char);
+                alloclen = strlen (mres->exp->vol->name) +
+                                   resolveloc_path_len + 2;
+                path = GF_MALLOC (alloclen, gf_nfs_mt_char);
                 if (!path) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
                                 NFS_MSG_NO_MEMORY,
@@ -1190,7 +1196,7 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                  */
                 __mnt3_build_mountid_from_path (authorized_path, fh.mountid);
 
-                snprintf (path, PATH_MAX, "/%s%s", mres->exp->vol->name,
+                snprintf (path, alloclen, "/%s%s", mres->exp->vol->name,
                          mres->resolveloc.path);
 
                 mnt3svc_update_mountlist (mres->mstate, mres->req,
@@ -1293,12 +1299,12 @@ mnt3_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         /* Building the actual mount path to be mounted */
         path_len = strlen (mres->exp->vol->name) +  strlen (absolute_path)
                    + strlen (mres->remainingdir) + 1;
-        real_loc = GF_CALLOC (1, path_len, gf_nfs_mt_char);
+        real_loc = GF_MALLOC (path_len, gf_nfs_mt_char);
         if (!real_loc) {
                 ret = -ENOMEM;
                 goto mnterr;
         }
-        sprintf (real_loc , "%s%s", mres->exp->vol->name, absolute_path);
+        snprintf (real_loc, path_len, "%s%s", mres->exp->vol->name, absolute_path);
         gf_path_strip_trailing_slashes (real_loc);
 
         /* There may entries after symlink in the mount path,
@@ -2314,7 +2320,7 @@ __build_mountlist (struct mount3_state *ms, int *count)
                 if (!first)
                         first = mlist;
 
-                mlist->ml_directory = GF_CALLOC (namelen + 2, sizeof (char),
+                mlist->ml_directory = GF_MALLOC (namelen + 2,
                                                  gf_nfs_mt_char);
                 if (!mlist->ml_directory) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -2325,7 +2331,7 @@ __build_mountlist (struct mount3_state *ms, int *count)
                 strcpy (mlist->ml_directory, me->exname);
 
                 namelen = strlen (me->hostname);
-                mlist->ml_hostname = GF_CALLOC (namelen + 2, sizeof (char),
+                mlist->ml_hostname = GF_MALLOC (namelen + 2,
                                                 gf_nfs_mt_char);
                 if (!mlist->ml_hostname) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -2654,7 +2660,6 @@ mnt3_xlchildren_to_exports (rpcsvc_t *svc, struct mount3_state *ms)
                 if (!nfs_subvolume_started (nfs, ent->vol))
                         continue;
 
-                namelen = strlen (ent->expname) + 1;
                 elist = GF_CALLOC (1, sizeof (*elist), gf_nfs_mt_exportnode);
                 if (!elist) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -2663,7 +2668,8 @@ mnt3_xlchildren_to_exports (rpcsvc_t *svc, struct mount3_state *ms)
                 }
                  if (!first)
                          first = elist;
-                elist->ex_dir = GF_CALLOC (namelen + 2, sizeof (char),
+                namelen = strlen (ent->expname);
+                elist->ex_dir = GF_MALLOC (namelen + 2,
                                            gf_nfs_mt_char);
                 if (!elist->ex_dir) {
                         gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM,
@@ -3324,7 +3330,7 @@ mnt3_init_export_ent (struct mount3_state *ms, xlator_t *xl, char *exportpath,
         else
                 alloclen = strlen (xl->name) + 2;
 
-        exp->expname = GF_CALLOC (alloclen, sizeof (char), gf_nfs_mt_char);
+        exp->expname = GF_MALLOC (alloclen, gf_nfs_mt_char);
         if (!exp->expname) {
                 gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM, NFS_MSG_NO_MEMORY,
                         "Memory allocation failed");
diff --git a/xlators/nfs/server/src/mount3udp_svc.c b/xlators/nfs/server/src/mount3udp_svc.c
index 8256a5970bb..a9499bf0038 100644
--- a/xlators/nfs/server/src/mount3udp_svc.c
+++ b/xlators/nfs/server/src/mount3udp_svc.c
@@ -110,7 +110,7 @@ mountudpproc3_umnt_3_svc(dirpath **dp, struct svc_req *req)
         char       *mpath = (char *) *dp;
         xlator_t   *nfsx = THIS;
 
-        stat = GF_CALLOC (1, sizeof(mountstat3), gf_nfs_mt_mountstat3);
+        stat = GF_MALLOC (sizeof(mountstat3), gf_nfs_mt_mountstat3);
         if (stat == NULL) {
                 gf_msg (GF_MNT, GF_LOG_ERROR, ENOMEM, NFS_MSG_NO_MEMORY,
                         "Unable to allocate memory");
diff --git a/xlators/nfs/server/src/nfs-fops.c b/xlators/nfs/server/src/nfs-fops.c
index 7c2aab53573..44141001361 100644
--- a/xlators/nfs/server/src/nfs-fops.c
+++ b/xlators/nfs/server/src/nfs-fops.c
@@ -334,7 +334,7 @@ nfs_gfid_dict (inode_t *inode)
         int     ret = -1;
         uuid_t  rootgfid = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
 
-        dyngfid = GF_CALLOC (1, sizeof (uuid_t), gf_common_mt_char);
+        dyngfid = GF_MALLOC (sizeof (uuid_t), gf_common_mt_char);
         if (dyngfid == NULL)
                 return (NULL);
 
diff --git a/xlators/nfs/server/src/nfs3-helpers.c b/xlators/nfs/server/src/nfs3-helpers.c
index 0b977092fbb..27edf471db2 100644
--- a/xlators/nfs/server/src/nfs3-helpers.c
+++ b/xlators/nfs/server/src/nfs3-helpers.c
@@ -673,6 +673,7 @@ entry3 *
 nfs3_fill_entry3 (gf_dirent_t *entry, struct nfs3_fh *dfh)
 {
         entry3          *ent = NULL;
+        int              name_len = 0;
         if ((!entry) || (!dfh))
                 return NULL;
 
@@ -692,14 +693,15 @@ nfs3_fill_entry3 (gf_dirent_t *entry, struct nfs3_fh *dfh)
         nfs3_funge_root_dotdot_dirent (entry, dfh);
         ent->fileid = entry->d_ino;
         ent->cookie = entry->d_off;
-        ent->name = GF_CALLOC ((strlen (entry->d_name) + 1), sizeof (char),
-                               gf_nfs_mt_char);
+        name_len = strlen(entry->d_name);
+        ent->name = GF_MALLOC (name_len + 1, gf_nfs_mt_char);
         if (!ent->name) {
                 GF_FREE (ent);
                 ent = NULL;
                 goto err;
         }
         strcpy (ent->name, entry->d_name);
+        ent->name[name_len] = '\0';
 
 err:
         return ent;
@@ -732,7 +734,7 @@ nfs3_fh_to_post_op_fh3 (struct nfs3_fh *fh)
 
         pfh.handle_follows = 1;
 
-        fhp = GF_CALLOC (1, sizeof (*fh), gf_nfs_mt_char);
+        fhp = GF_MALLOC (sizeof (*fh), gf_nfs_mt_char);
         if (!fhp)
                 return pfh;
 
@@ -747,6 +749,7 @@ nfs3_fill_entryp3 (gf_dirent_t *entry, struct nfs3_fh *dirfh, uint64_t devid)
 {
         entryp3         *ent = NULL;
         struct nfs3_fh  newfh = {{0}, };
+        int             name_len = 0;
 
         if ((!entry) || (!dirfh))
                 return NULL;
@@ -767,14 +770,15 @@ nfs3_fill_entryp3 (gf_dirent_t *entry, struct nfs3_fh *dirfh, uint64_t devid)
 
         ent->fileid = entry->d_ino;
         ent->cookie = entry->d_off;
-        ent->name = GF_CALLOC ((strlen (entry->d_name) + 1), sizeof (char),
-                               gf_nfs_mt_char);
+        name_len = strlen (entry->d_name);
+        ent->name = GF_MALLOC (name_len + 1, gf_nfs_mt_char);
         if (!ent->name) {
                 GF_FREE (ent);
                 ent = NULL;
                 goto err;
         }
         strcpy (ent->name, entry->d_name);
+        ent->name[name_len] = '\0';
 
         nfs3_fh_build_child_fh (dirfh, &entry->d_stat, &newfh);
         nfs3_map_deviceid_to_statdev (&entry->d_stat, devid);
diff --git a/xlators/performance/io-cache/src/page.c b/xlators/performance/io-cache/src/page.c
index 50f5e190e21..33e728cfc8c 100644
--- a/xlators/performance/io-cache/src/page.c
+++ b/xlators/performance/io-cache/src/page.c
@@ -853,6 +853,7 @@ ioc_frame_unwind (call_frame_t *frame)
         }
 
         list_for_each_entry_safe (fill, next, &local->fill_list, list) {
+                /* # TODO: check why this if clause is needed at all. */
                 if ((vector != NULL) &&  (iobref != NULL)) {
                         memcpy (((char *)vector) + copied,
                                 fill->vector,
diff --git a/xlators/performance/md-cache/src/md-cache.c b/xlators/performance/md-cache/src/md-cache.c
index 7da877f87e2..1f998cfcf21 100644
--- a/xlators/performance/md-cache/src/md-cache.c
+++ b/xlators/performance/md-cache/src/md-cache.c
@@ -3244,7 +3244,7 @@ mdc_xattr_list_populate (struct mdc_conf *conf, char *tmp_str)
                            "user.org.netatalk.ResourceFork")
                    + strlen (tmp_str) + 5; /*Some buffer bytes*/
 
-        mdc_xattr_str = GF_CALLOC (1, max_size, gf_common_mt_char);
+        mdc_xattr_str = GF_MALLOC (max_size, gf_common_mt_char);
         GF_CHECK_ALLOC (mdc_xattr_str, ret, out);
 
         if (conf->cache_capability)
diff --git a/xlators/performance/quick-read/src/quick-read.c b/xlators/performance/quick-read/src/quick-read.c
index 8d39720e7f2..094609684ff 100644
--- a/xlators/performance/quick-read/src/quick-read.c
+++ b/xlators/performance/quick-read/src/quick-read.c
@@ -414,7 +414,7 @@ qr_content_extract (dict_t *xdata)
 	if (ret < 0 || !data)
 		return NULL;
 
-	content = GF_CALLOC (1, data->len, gf_qr_mt_content_t);
+	content = GF_MALLOC (data->len, gf_qr_mt_content_t);
 	if (!content)
 		goto out;
 
diff --git a/xlators/protocol/client/src/client-lk.c b/xlators/protocol/client/src/client-lk.c
index b5e11aa07fd..4851252e8a6 100644
--- a/xlators/protocol/client/src/client-lk.c
+++ b/xlators/protocol/client/src/client-lk.c
@@ -158,7 +158,7 @@ subtract_locks (client_posix_lock_t *big, client_posix_lock_t *small)
 	if ((big->fl_start == small->fl_start) &&
 	    (big->fl_end   == small->fl_end)) {
 		/* both edges coincide with big */
-		v.locks[0] = GF_CALLOC (1, sizeof (client_posix_lock_t),
+		v.locks[0] = GF_MALLOC (sizeof (client_posix_lock_t),
                                         gf_client_mt_clnt_lock_t );
 		GF_ASSERT (v.locks[0]);
 		memcpy (v.locks[0], big, sizeof (client_posix_lock_t));
@@ -167,54 +167,49 @@ subtract_locks (client_posix_lock_t *big, client_posix_lock_t *small)
 	else if ((small->fl_start > big->fl_start) &&
 		 (small->fl_end   < big->fl_end)) {
 		/* both edges lie inside big */
-		v.locks[0] = GF_CALLOC (1, sizeof (client_posix_lock_t),
+		v.locks[0] = GF_MALLOC (sizeof (client_posix_lock_t),
                                         gf_client_mt_clnt_lock_t);
 		GF_ASSERT (v.locks[0]);
-		v.locks[1] = GF_CALLOC (1, sizeof (client_posix_lock_t),
-                                     gf_client_mt_clnt_lock_t);
-		GF_ASSERT (v.locks[1]);
-		v.locks[2] = GF_CALLOC (1, sizeof (client_posix_lock_t),
-                                        gf_client_mt_clnt_lock_t);
-		GF_ASSERT (v.locks[2]);
-
 		memcpy (v.locks[0], big, sizeof (client_posix_lock_t));
 		v.locks[0]->fl_end = small->fl_start - 1;
                 v.locks[0]->user_flock.l_len = __get_lock_length (v.locks[0]->fl_start,
                                                                   v.locks[0]->fl_end);
-
+		v.locks[1] = GF_MALLOC (sizeof (client_posix_lock_t),
+                                     gf_client_mt_clnt_lock_t);
+		GF_ASSERT (v.locks[1]);
 		memcpy (v.locks[1], small, sizeof (client_posix_lock_t));
+		v.locks[2] = GF_MALLOC (sizeof (client_posix_lock_t),
+                                        gf_client_mt_clnt_lock_t);
+		GF_ASSERT (v.locks[2]);
 		memcpy (v.locks[2], big, sizeof (client_posix_lock_t));
 		v.locks[2]->fl_start = small->fl_end + 1;
                 v.locks[2]->user_flock.l_start = small->fl_end + 1;
 	}
 	/* one edge coincides with big */
 	else if (small->fl_start == big->fl_start) {
-		v.locks[0] = GF_CALLOC (1, sizeof (client_posix_lock_t),
+		v.locks[0] = GF_MALLOC (sizeof (client_posix_lock_t),
                                         gf_client_mt_clnt_lock_t);
 		GF_ASSERT (v.locks[0]);
-		v.locks[1] = GF_CALLOC (1, sizeof (client_posix_lock_t),
-                                        gf_client_mt_clnt_lock_t);
-		GF_ASSERT (v.locks[1]);
-
 		memcpy (v.locks[0], big, sizeof (client_posix_lock_t));
 		v.locks[0]->fl_start = small->fl_end + 1;
                 v.locks[0]->user_flock.l_start = small->fl_end + 1;
-
+		v.locks[1] = GF_MALLOC (sizeof (client_posix_lock_t),
+                                        gf_client_mt_clnt_lock_t);
+		GF_ASSERT (v.locks[1]);
 		memcpy (v.locks[1], small, sizeof (client_posix_lock_t));
 	}
 	else if (small->fl_end   == big->fl_end) {
-		v.locks[0] = GF_CALLOC (1, sizeof (client_posix_lock_t),
+		v.locks[0] = GF_MALLOC (sizeof (client_posix_lock_t),
                                         gf_client_mt_clnt_lock_t);
 		GF_ASSERT (v.locks[0]);
-		v.locks[1] = GF_CALLOC (1, sizeof (client_posix_lock_t),
-                                        gf_client_mt_clnt_lock_t);
-		GF_ASSERT (v.locks[1]);
-
 		memcpy (v.locks[0], big, sizeof (client_posix_lock_t));
 		v.locks[0]->fl_end = small->fl_start - 1;
                 v.locks[0]->user_flock.l_len = __get_lock_length (v.locks[0]->fl_start,
                                                                   v.locks[0]->fl_end);
 
+		v.locks[1] = GF_MALLOC (sizeof (client_posix_lock_t),
+                                        gf_client_mt_clnt_lock_t);
+		GF_ASSERT (v.locks[1]);
 		memcpy (v.locks[1], small, sizeof (client_posix_lock_t));
 	}
         else {
diff --git a/xlators/storage/bd/src/bd.c b/xlators/storage/bd/src/bd.c
index 08dc35034f8..0f4ad16b024 100644
--- a/xlators/storage/bd/src/bd.c
+++ b/xlators/storage/bd/src/bd.c
@@ -993,10 +993,11 @@ bd_setx_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 goto out;
         }
 
-        param = copy = GF_CALLOC (1, local->data->len + 1, gf_common_mt_char);
+        param = copy = GF_MALLOC (local->data->len + 1, gf_common_mt_char);
         BD_VALIDATE_MEM_ALLOC (param, op_errno, out);
 
         strncpy (param, local->data->data, local->data->len);
+        param[local->data->len] = '\0';
 
         type = strtok_r (param, ":", &p);
         if (!type) {
@@ -1292,7 +1293,7 @@ bd_offload (call_frame_t *frame, xlator_t *this, loc_t *loc,
         int         op_errno   = 0;
         bd_local_t *local      = frame->local;
 
-        param = GF_CALLOC (1, local->data->len + 1, gf_common_mt_char);
+        param = GF_MALLOC (local->data->len + 1, gf_common_mt_char);
         BD_VALIDATE_MEM_ALLOC (param, op_errno, out);
         param_copy = param;
 
@@ -1303,6 +1304,7 @@ bd_offload (call_frame_t *frame, xlator_t *this, loc_t *loc,
         BD_VALIDATE_MEM_ALLOC (local->dloc, op_errno, out);
 
         strncpy (param, local->data->data, local->data->len);
+        param[local->data->len] = '\0';
 
         gfid = strtok_r (param, ":", &p);
         size = strtok_r (NULL, ":", &p);
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index b4d433e369d..bd5b6e6b98b 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -272,18 +272,21 @@ _posix_xattr_get_set_from_backend (posix_xattr_filler_t *filler, char *key)
         }
 
         if (xattr_size != -1) {
-                value = GF_CALLOC (1, xattr_size + 1, gf_posix_mt_char);
+                value = GF_MALLOC (xattr_size + 1, gf_posix_mt_char);
                 if (!value)
                         goto out;
 
                 if (have_val) {
                         memcpy (value, val_buf, xattr_size);
-                } else if (filler->real_path) {
-                        xattr_size = sys_lgetxattr (filler->real_path, key,
-                                                    value, xattr_size);
                 } else {
-                        xattr_size = sys_fgetxattr (filler->fdnum, key, value,
-                                                    xattr_size);
+                        bzero(value, xattr_size + 1);
+                        if (filler->real_path) {
+                                xattr_size = sys_lgetxattr (filler->real_path,
+                                                    key, value, xattr_size);
+                        } else {
+                                xattr_size = sys_fgetxattr (filler->fdnum, key,
+                                                    value, xattr_size);
+                        }
                 }
                 if (xattr_size == -1) {
                         if (filler->real_path)
@@ -2518,7 +2521,7 @@ posix_fetch_signature_xattr (char *real_path,
         gf_boolean_t have_val  = _gf_false;
 
         xattrsize = sys_lgetxattr (real_path, key, val_buf,
-                                                           sizeof(val_buf) - 1);
+                                   sizeof(val_buf) - 1);
         if (xattrsize >= 0) {
                 have_val = _gf_true;
         } else {
@@ -2529,12 +2532,14 @@ posix_fetch_signature_xattr (char *real_path,
                 if (xattrsize == -1)
                         goto error_return;
         }
-        memptr = GF_CALLOC (xattrsize + 1, sizeof (char), gf_posix_mt_char);
+        memptr = GF_MALLOC (xattrsize + 1, gf_posix_mt_char);
         if (!memptr)
                 goto error_return;
         if (have_val) {
                 memcpy (memptr, val_buf, xattrsize);
+                memptr[xattrsize] = '\0';
         } else {
+                bzero (memptr, xattrsize + 1);
                 ret = sys_lgetxattr (real_path, key, memptr, xattrsize);
                 if (ret == -1)
                         goto freemem;
@@ -2881,7 +2886,7 @@ posix_set_iatt_in_dict (dict_t *dict, struct iatt *preop, struct iatt *postop)
                 return ret;
 
         if (postop) {
-                stbuf = GF_CALLOC (1, len, gf_common_mt_char);
+                stbuf = GF_MALLOC (len, gf_common_mt_char);
                 if (!stbuf)
                         goto out;
                 memcpy (stbuf, postop, len);
@@ -2894,7 +2899,7 @@ posix_set_iatt_in_dict (dict_t *dict, struct iatt *preop, struct iatt *postop)
         }
 
         if (preop) {
-                prebuf = GF_CALLOC (1, len, gf_common_mt_char);
+                prebuf = GF_MALLOC (len, gf_common_mt_char);
                 if (!prebuf)
                         goto out;
                 memcpy (prebuf, preop, len);
@@ -2906,7 +2911,7 @@ posix_set_iatt_in_dict (dict_t *dict, struct iatt *preop, struct iatt *postop)
         }
 
         if (postop) {
-                postbuf = GF_CALLOC (1, len, gf_common_mt_char);
+                postbuf = GF_MALLOC (len, gf_common_mt_char);
                 if (!postbuf)
                         goto out;
                 memcpy (postbuf, postop, len);
diff --git a/xlators/storage/posix/src/posix-inode-fd-ops.c b/xlators/storage/posix/src/posix-inode-fd-ops.c
index 89355757508..ed5f439ac73 100644
--- a/xlators/storage/posix/src/posix-inode-fd-ops.c
+++ b/xlators/storage/posix/src/posix-inode-fd-ops.c
@@ -3224,7 +3224,7 @@ posix_getxattr (call_frame_t *frame, xlator_t *this,
                                 goto out;
                         }
                 }
-                value = GF_CALLOC (size + 1, sizeof(char), gf_posix_mt_char);
+                value = GF_MALLOC (size + 1, gf_posix_mt_char);
                 if (!value) {
                         op_ret = -1;
                         op_errno = ENOMEM;
@@ -3233,6 +3233,7 @@ posix_getxattr (call_frame_t *frame, xlator_t *this,
                 if (have_val) {
                         memcpy (value, value_buf, size);
                 } else {
+                        bzero (value, size + 1);
                         size = sys_lgetxattr (real_path, key, value, size);
                         if (size == -1) {
                                 op_ret = -1;
@@ -3349,8 +3350,7 @@ posix_getxattr (call_frame_t *frame, xlator_t *this,
                                 goto out;
                         }
                 }
-                value = GF_CALLOC (size + 1, sizeof(char),
-                                   gf_posix_mt_char);
+                value = GF_MALLOC (size + 1, gf_posix_mt_char);
                 if (!value) {
                         op_errno = errno;
                         goto out;
@@ -3358,6 +3358,7 @@ posix_getxattr (call_frame_t *frame, xlator_t *this,
                 if (have_val) {
                         memcpy (value, value_buf, size);
                 } else {
+                        bzero(value, size + 1);
                         size = sys_lgetxattr (real_path, keybuffer, value, size);
                         if (size == -1) {
                                 op_errno = errno;
@@ -3533,7 +3534,7 @@ posix_fgetxattr (call_frame_t *frame, xlator_t *this,
                                 goto done;
                         }
                 }
-                value = GF_CALLOC (size + 1, sizeof(char), gf_posix_mt_char);
+                value = GF_MALLOC (size + 1, gf_posix_mt_char);
                 if (!value) {
                         op_ret = -1;
                         op_errno = ENOMEM;
@@ -3542,6 +3543,7 @@ posix_fgetxattr (call_frame_t *frame, xlator_t *this,
                 if (have_val) {
                         memcpy (value, value_buf, size);
                 } else {
+                        bzero (value, size + 1);
                         size = sys_fgetxattr (_fd, key, value, size);
                         if (size == -1) {
                                 op_ret = -1;
@@ -3639,8 +3641,7 @@ posix_fgetxattr (call_frame_t *frame, xlator_t *this,
                                 break;
                         }
                 }
-                value = GF_CALLOC (size + 1, sizeof(char),
-                                   gf_posix_mt_char);
+                value = GF_MALLOC (size + 1, gf_posix_mt_char);
                 if (!value) {
                         op_ret = -1;
                         op_errno = errno;
@@ -3649,6 +3650,7 @@ posix_fgetxattr (call_frame_t *frame, xlator_t *this,
                 if (have_val) {
                         memcpy (value, value_buf, size);
                 } else {
+                        bzero (value, size + 1);
                         size = sys_fgetxattr (_fd, key, value, size);
                         if (size == -1) {
                                 op_ret = -1;
@@ -5046,11 +5048,12 @@ posix_readdirp_fill (xlator_t *this, fd_t *fd, gf_dirent_t *entries, dict_t *dic
         hpath[len] = '/';
 
         list_for_each_entry (entry, &entries->list, list) {
-                memset (gfid, 0, 16);
                 inode = inode_grep (fd->inode->table, fd->inode,
                                     entry->d_name);
                 if (inode)
                         gf_uuid_copy (gfid, inode->gfid);
+                else
+                        bzero(gfid, 16);
 
                 strcpy (&hpath[len+1], entry->d_name);