Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target updates from Nicholas Bellinger:
 "This series contains HCH's changes to absorb configfs attribute
  ->show() + ->store() function pointer usage from it's original
  tree-wide consumers, into common configfs code.

  It includes usb-gadget, target w/ drivers, netconsole and ocfs2
  changes to realize the improved simplicity, that now renders the
  original include/target/configfs_macros.h CPP magic for fabric drivers
  and others, unnecessary and obsolete.

  And with common code in place, new configfs attributes can be added
  easier than ever before.

  Note, there are further improvements in-flight from other folks for
  v4.5 code in configfs land, plus number of target fixes for post -rc1
  code"

In the meantime, a new user of the now-removed old configfs API came in
through the char/misc tree in commit 7bd1d4093c2f ("stm class: Introduce
an abstraction for System Trace Module devices").

This merge resolution comes from Alexander Shishkin, who updated his stm
class tracing abstraction to account for the removal of the old
show_attribute and store_attribute methods in commit 517982229f78
("configfs: remove old API") from this pull.  As Alexander says about
that patch:

 "There's no need to keep an extra wrapper structure per item and the
  awkward show_attribute/store_attribute item ops are no longer needed.

  This patch converts policy code to the new api, all the while making
  the code quite a bit smaller and easier on the eyes.

  Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>"

That patch was folded into the merge so that the tree should be fully
bisectable.

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (23 commits)
  configfs: remove old API
  ocfs2/cluster: use per-attribute show and store methods
  ocfs2/cluster: move locking into attribute store methods
  netconsole: use per-attribute show and store methods
  target: use per-attribute show and store methods
  spear13xx_pcie_gadget: use per-attribute show and store methods
  dlm: use per-attribute show and store methods
  usb-gadget/f_serial: use per-attribute show and store methods
  usb-gadget/f_phonet: use per-attribute show and store methods
  usb-gadget/f_obex: use per-attribute show and store methods
  usb-gadget/f_uac2: use per-attribute show and store methods
  usb-gadget/f_uac1: use per-attribute show and store methods
  usb-gadget/f_mass_storage: use per-attribute show and store methods
  usb-gadget/f_sourcesink: use per-attribute show and store methods
  usb-gadget/f_printer: use per-attribute show and store methods
  usb-gadget/f_midi: use per-attribute show and store methods
  usb-gadget/f_loopback: use per-attribute show and store methods
  usb-gadget/ether: use per-attribute show and store methods
  usb-gadget/f_acm: use per-attribute show and store methods
  usb-gadget/f_hid: use per-attribute show and store methods
  ...

4 files changed, 191 insertions, 595 deletions

diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 403269ffcdf3..d39099ea7df7 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -65,7 +65,6 @@ static int fill_read_buffer(struct dentry * dentry, struct configfs_buffer * buf
 {
 	struct configfs_attribute * attr = to_attr(dentry);
 	struct config_item * item = to_item(dentry->d_parent);
-	struct configfs_item_operations * ops = buffer->ops;
 	int ret = 0;
 	ssize_t count;
 
@@ -74,7 +73,8 @@ static int fill_read_buffer(struct dentry * dentry, struct configfs_buffer * buf
 	if (!buffer->page)
 		return -ENOMEM;
 
-	count = ops->show_attribute(item,attr,buffer->page);
+	count = attr->show(item, buffer->page);
+
 	buffer->needs_read_fill = 0;
 	BUG_ON(count > (ssize_t)SIMPLE_ATTR_SIZE);
 	if (count >= 0)
@@ -171,9 +171,8 @@ flush_write_buffer(struct dentry * dentry, struct configfs_buffer * buffer, size
 {
 	struct configfs_attribute * attr = to_attr(dentry);
 	struct config_item * item = to_item(dentry->d_parent);
-	struct configfs_item_operations * ops = buffer->ops;
 
-	return ops->store_attribute(item,attr,buffer->page,count);
+	return attr->store(item, buffer->page, count);
 }
 
 
@@ -237,8 +236,7 @@ static int check_perm(struct inode * inode, struct file * file)
 	 * and we must have a store method.
 	 */
 	if (file->f_mode & FMODE_WRITE) {
-
-		if (!(inode->i_mode & S_IWUGO) || !ops->store_attribute)
+		if (!(inode->i_mode & S_IWUGO) || !attr->store)
 			goto Eaccess;
 
 	}
@@ -248,7 +246,7 @@ static int check_perm(struct inode * inode, struct file * file)
 	 * must be a show method for it.
 	 */
 	if (file->f_mode & FMODE_READ) {
-		if (!(inode->i_mode & S_IRUGO) || !ops->show_attribute)
+		if (!(inode->i_mode & S_IRUGO) || !attr->show)
 			goto Eaccess;
 	}
 
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index d521bddf876d..8e294fbbac39 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -61,35 +61,8 @@ static struct config_item *make_node(struct config_group *, const char *);
 static void drop_node(struct config_group *, struct config_item *);
 static void release_node(struct config_item *);
 
-static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
-			    char *buf);
-static ssize_t store_cluster(struct config_item *i,
-			     struct configfs_attribute *a,
-			     const char *buf, size_t len);
-static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
-			 char *buf);
-static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
-			  const char *buf, size_t len);
-static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
-			 char *buf);
-static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
-			  const char *buf, size_t len);
-
-static ssize_t comm_nodeid_read(struct dlm_comm *cm, char *buf);
-static ssize_t comm_nodeid_write(struct dlm_comm *cm, const char *buf,
-				size_t len);
-static ssize_t comm_local_read(struct dlm_comm *cm, char *buf);
-static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
-				size_t len);
-static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf,
-				size_t len);
-static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf);
-static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf);
-static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
-				size_t len);
-static ssize_t node_weight_read(struct dlm_node *nd, char *buf);
-static ssize_t node_weight_write(struct dlm_node *nd, const char *buf,
-				size_t len);
+static struct configfs_attribute *comm_attrs[];
+static struct configfs_attribute *node_attrs[];
 
 struct dlm_cluster {
 	struct config_group group;
@@ -108,6 +81,12 @@ struct dlm_cluster {
 	char cl_cluster_name[DLM_LOCKSPACE_LEN];
 };
 
+static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
+{
+	return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
+		   NULL;
+}
+
 enum {
 	CLUSTER_ATTR_TCP_PORT = 0,
 	CLUSTER_ATTR_BUFFER_SIZE,
@@ -124,33 +103,24 @@ enum {
 	CLUSTER_ATTR_CLUSTER_NAME,
 };
 
-struct cluster_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct dlm_cluster *, char *);
-	ssize_t (*store)(struct dlm_cluster *, const char *, size_t);
-};
-
-static ssize_t cluster_cluster_name_read(struct dlm_cluster *cl, char *buf)
+static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
 {
+	struct dlm_cluster *cl = config_item_to_cluster(item);
 	return sprintf(buf, "%s\n", cl->cl_cluster_name);
 }
 
-static ssize_t cluster_cluster_name_write(struct dlm_cluster *cl,
+static ssize_t cluster_cluster_name_store(struct config_item *item,
 					  const char *buf, size_t len)
 {
+	struct dlm_cluster *cl = config_item_to_cluster(item);
+
 	strlcpy(dlm_config.ci_cluster_name, buf,
 				sizeof(dlm_config.ci_cluster_name));
 	strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
 	return len;
 }
 
-static struct cluster_attribute cluster_attr_cluster_name = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "cluster_name",
-                    .ca_mode = S_IRUGO | S_IWUSR },
-	.show   = cluster_cluster_name_read,
-	.store  = cluster_cluster_name_write,
-};
+CONFIGFS_ATTR(cluster_, cluster_name);
 
 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
 			   int *info_field, int check_zero,
@@ -175,17 +145,19 @@ static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
 }
 
 #define CLUSTER_ATTR(name, check_zero)                                        \
-static ssize_t name##_write(struct dlm_cluster *cl, const char *buf, size_t len) \
+static ssize_t cluster_##name##_store(struct config_item *item, \
+		const char *buf, size_t len) \
 {                                                                             \
+	struct dlm_cluster *cl = config_item_to_cluster(item);		      \
 	return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name,         \
 			   check_zero, buf, len);                             \
 }                                                                             \
-static ssize_t name##_read(struct dlm_cluster *cl, char *buf)                 \
+static ssize_t cluster_##name##_show(struct config_item *item, char *buf)     \
 {                                                                             \
+	struct dlm_cluster *cl = config_item_to_cluster(item);		      \
 	return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name);               \
 }                                                                             \
-static struct cluster_attribute cluster_attr_##name =                         \
-__CONFIGFS_ATTR(name, 0644, name##_read, name##_write)
+CONFIGFS_ATTR(cluster_, name);
 
 CLUSTER_ATTR(tcp_port, 1);
 CLUSTER_ATTR(buffer_size, 1);
@@ -201,19 +173,19 @@ CLUSTER_ATTR(new_rsb_count, 0);
 CLUSTER_ATTR(recover_callbacks, 0);
 
 static struct configfs_attribute *cluster_attrs[] = {
-	[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
-	[CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr,
-	[CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr,
-	[CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr,
-	[CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr,
-	[CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr,
-	[CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr,
-	[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr,
-	[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs.attr,
-	[CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us.attr,
-	[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count.attr,
-	[CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks.attr,
-	[CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name.attr,
+	[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
+	[CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
+	[CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
+	[CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
+	[CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
+	[CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
+	[CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
+	[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
+	[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
+	[CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us,
+	[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
+	[CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
+	[CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
 	NULL,
 };
 
@@ -224,83 +196,11 @@ enum {
 	COMM_ATTR_ADDR_LIST,
 };
 
-struct comm_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct dlm_comm *, char *);
-	ssize_t (*store)(struct dlm_comm *, const char *, size_t);
-};
-
-static struct comm_attribute comm_attr_nodeid = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "nodeid",
-                    .ca_mode = S_IRUGO | S_IWUSR },
-	.show   = comm_nodeid_read,
-	.store  = comm_nodeid_write,
-};
-
-static struct comm_attribute comm_attr_local = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "local",
-                    .ca_mode = S_IRUGO | S_IWUSR },
-	.show   = comm_local_read,
-	.store  = comm_local_write,
-};
-
-static struct comm_attribute comm_attr_addr = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "addr",
-                    .ca_mode = S_IWUSR },
-	.store  = comm_addr_write,
-};
-
-static struct comm_attribute comm_attr_addr_list = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "addr_list",
-                    .ca_mode = S_IRUGO },
-	.show   = comm_addr_list_read,
-};
-
-static struct configfs_attribute *comm_attrs[] = {
-	[COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
-	[COMM_ATTR_LOCAL] = &comm_attr_local.attr,
-	[COMM_ATTR_ADDR] = &comm_attr_addr.attr,
-	[COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list.attr,
-	NULL,
-};
-
 enum {
 	NODE_ATTR_NODEID = 0,
 	NODE_ATTR_WEIGHT,
 };
 
-struct node_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct dlm_node *, char *);
-	ssize_t (*store)(struct dlm_node *, const char *, size_t);
-};
-
-static struct node_attribute node_attr_nodeid = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "nodeid",
-                    .ca_mode = S_IRUGO | S_IWUSR },
-	.show   = node_nodeid_read,
-	.store  = node_nodeid_write,
-};
-
-static struct node_attribute node_attr_weight = {
-	.attr   = { .ca_owner = THIS_MODULE,
-                    .ca_name = "weight",
-                    .ca_mode = S_IRUGO | S_IWUSR },
-	.show   = node_weight_read,
-	.store  = node_weight_write,
-};
-
-static struct configfs_attribute *node_attrs[] = {
-	[NODE_ATTR_NODEID] = &node_attr_nodeid.attr,
-	[NODE_ATTR_WEIGHT] = &node_attr_weight.attr,
-	NULL,
-};
-
 struct dlm_clusters {
 	struct configfs_subsystem subsys;
 };
@@ -349,8 +249,6 @@ static struct configfs_group_operations clusters_ops = {
 
 static struct configfs_item_operations cluster_ops = {
 	.release = release_cluster,
-	.show_attribute = show_cluster,
-	.store_attribute = store_cluster,
 };
 
 static struct configfs_group_operations spaces_ops = {
@@ -369,8 +267,6 @@ static struct configfs_group_operations comms_ops = {
 
 static struct configfs_item_operations comm_ops = {
 	.release = release_comm,
-	.show_attribute = show_comm,
-	.store_attribute = store_comm,
 };
 
 static struct configfs_group_operations nodes_ops = {
@@ -380,8 +276,6 @@ static struct configfs_group_operations nodes_ops = {
 
 static struct configfs_item_operations node_ops = {
 	.release = release_node,
-	.show_attribute = show_node,
-	.store_attribute = store_node,
 };
 
 static struct config_item_type clusters_type = {
@@ -427,12 +321,6 @@ static struct config_item_type node_type = {
 	.ct_owner = THIS_MODULE,
 };
 
-static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
-{
-	return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
-		   NULL;
-}
-
 static struct dlm_space *config_item_to_space(struct config_item *i)
 {
 	return i ? container_of(to_config_group(i), struct dlm_space, group) :
@@ -687,66 +575,30 @@ void dlm_config_exit(void)
  * Functions for user space to read/write attributes
  */
 
-static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
-			    char *buf)
-{
-	struct dlm_cluster *cl = config_item_to_cluster(i);
-	struct cluster_attribute *cla =
-			container_of(a, struct cluster_attribute, attr);
-	return cla->show ? cla->show(cl, buf) : 0;
-}
-
-static ssize_t store_cluster(struct config_item *i,
-			     struct configfs_attribute *a,
-			     const char *buf, size_t len)
+static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
 {
-	struct dlm_cluster *cl = config_item_to_cluster(i);
-	struct cluster_attribute *cla =
-		container_of(a, struct cluster_attribute, attr);
-	return cla->store ? cla->store(cl, buf, len) : -EINVAL;
-}
-
-static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
-			 char *buf)
-{
-	struct dlm_comm *cm = config_item_to_comm(i);
-	struct comm_attribute *cma =
-			container_of(a, struct comm_attribute, attr);
-	return cma->show ? cma->show(cm, buf) : 0;
-}
-
-static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
-			  const char *buf, size_t len)
-{
-	struct dlm_comm *cm = config_item_to_comm(i);
-	struct comm_attribute *cma =
-		container_of(a, struct comm_attribute, attr);
-	return cma->store ? cma->store(cm, buf, len) : -EINVAL;
+	return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
 }
 
-static ssize_t comm_nodeid_read(struct dlm_comm *cm, char *buf)
-{
-	return sprintf(buf, "%d\n", cm->nodeid);
-}
-
-static ssize_t comm_nodeid_write(struct dlm_comm *cm, const char *buf,
+static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
 				 size_t len)
 {
-	int rc = kstrtoint(buf, 0, &cm->nodeid);
+	int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
 
 	if (rc)
 		return rc;
 	return len;
 }
 
-static ssize_t comm_local_read(struct dlm_comm *cm, char *buf)
+static ssize_t comm_local_show(struct config_item *item, char *buf)
 {
-	return sprintf(buf, "%d\n", cm->local);
+	return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
 }
 
-static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
+static ssize_t comm_local_store(struct config_item *item, const char *buf,
 				size_t len)
 {
+	struct dlm_comm *cm = config_item_to_comm(item);
 	int rc = kstrtoint(buf, 0, &cm->local);
 
 	if (rc)
@@ -756,8 +608,10 @@ static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
 	return len;
 }
 
-static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf, size_t len)
+static ssize_t comm_addr_store(struct config_item *item, const char *buf,
+		size_t len)
 {
+	struct dlm_comm *cm = config_item_to_comm(item);
 	struct sockaddr_storage *addr;
 	int rv;
 
@@ -783,8 +637,9 @@ static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf, size_t len)
 	return len;
 }
 
-static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf)
+static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
 {
+	struct dlm_comm *cm = config_item_to_comm(item);
 	ssize_t s;
 	ssize_t allowance;
 	int i;
@@ -827,32 +682,28 @@ static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf)
 	return 4096 - allowance;
 }
 
-static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
-			 char *buf)
-{
-	struct dlm_node *nd = config_item_to_node(i);
-	struct node_attribute *nda =
-			container_of(a, struct node_attribute, attr);
-	return nda->show ? nda->show(nd, buf) : 0;
-}
+CONFIGFS_ATTR(comm_, nodeid);
+CONFIGFS_ATTR(comm_, local);
+CONFIGFS_ATTR_WO(comm_, addr);
+CONFIGFS_ATTR_RO(comm_, addr_list);
 
-static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
-			  const char *buf, size_t len)
-{
-	struct dlm_node *nd = config_item_to_node(i);
-	struct node_attribute *nda =
-		container_of(a, struct node_attribute, attr);
-	return nda->store ? nda->store(nd, buf, len) : -EINVAL;
-}
+static struct configfs_attribute *comm_attrs[] = {
+	[COMM_ATTR_NODEID] = &comm_attr_nodeid,
+	[COMM_ATTR_LOCAL] = &comm_attr_local,
+	[COMM_ATTR_ADDR] = &comm_attr_addr,
+	[COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
+	NULL,
+};
 
-static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf)
+static ssize_t node_nodeid_show(struct config_item *item, char *buf)
 {
-	return sprintf(buf, "%d\n", nd->nodeid);
+	return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
 }
 
-static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
+static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
 				 size_t len)
 {
+	struct dlm_node *nd = config_item_to_node(item);
 	uint32_t seq = 0;
 	int rc = kstrtoint(buf, 0, &nd->nodeid);
 
@@ -863,21 +714,30 @@ static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
 	return len;
 }
 
-static ssize_t node_weight_read(struct dlm_node *nd, char *buf)
+static ssize_t node_weight_show(struct config_item *item, char *buf)
 {
-	return sprintf(buf, "%d\n", nd->weight);
+	return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
 }
 
-static ssize_t node_weight_write(struct dlm_node *nd, const char *buf,
+static ssize_t node_weight_store(struct config_item *item, const char *buf,
 				 size_t len)
 {
-	int rc = kstrtoint(buf, 0, &nd->weight);
+	int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
 
 	if (rc)
 		return rc;
 	return len;
 }
 
+CONFIGFS_ATTR(node_, nodeid);
+CONFIGFS_ATTR(node_, weight);
+
+static struct configfs_attribute *node_attrs[] = {
+	[NODE_ATTR_NODEID] = &node_attr_nodeid,
+	[NODE_ATTR_WEIGHT] = &node_attr_weight,
+	NULL,
+};
+
 /*
  * Functions for the dlm to get the info that's been configured
  */
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index ddddef0021a0..709fbbd44c65 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1480,16 +1480,17 @@ static int o2hb_read_block_input(struct o2hb_region *reg,
 	return 0;
 }
 
-static ssize_t o2hb_region_block_bytes_read(struct o2hb_region *reg,
+static ssize_t o2hb_region_block_bytes_show(struct config_item *item,
 					    char *page)
 {
-	return sprintf(page, "%u\n", reg->hr_block_bytes);
+	return sprintf(page, "%u\n", to_o2hb_region(item)->hr_block_bytes);
 }
 
-static ssize_t o2hb_region_block_bytes_write(struct o2hb_region *reg,
+static ssize_t o2hb_region_block_bytes_store(struct config_item *item,
 					     const char *page,
 					     size_t count)
 {
+	struct o2hb_region *reg = to_o2hb_region(item);
 	int status;
 	unsigned long block_bytes;
 	unsigned int block_bits;
@@ -1508,16 +1509,17 @@ static ssize_t o2hb_region_block_bytes_write(struct o2hb_region *reg,
 	return count;
 }
 
-static ssize_t o2hb_region_start_block_read(struct o2hb_region *reg,
+static ssize_t o2hb_region_start_block_show(struct config_item *item,
 					    char *page)
 {
-	return sprintf(page, "%llu\n", reg->hr_start_block);
+	return sprintf(page, "%llu\n", to_o2hb_region(item)->hr_start_block);
 }
 
-static ssize_t o2hb_region_start_block_write(struct o2hb_region *reg,
+static ssize_t o2hb_region_start_block_store(struct config_item *item,
 					     const char *page,
 					     size_t count)
 {
+	struct o2hb_region *reg = to_o2hb_region(item);
 	unsigned long long tmp;
 	char *p = (char *)page;
 
@@ -1533,16 +1535,16 @@ static ssize_t o2hb_region_start_block_write(struct o2hb_region *reg,
 	return count;
 }
 
-static ssize_t o2hb_region_blocks_read(struct o2hb_region *reg,
-				       char *page)
+static ssize_t o2hb_region_blocks_show(struct config_item *item, char *page)
 {
-	return sprintf(page, "%d\n", reg->hr_blocks);
+	return sprintf(page, "%d\n", to_o2hb_region(item)->hr_blocks);
 }
 
-static ssize_t o2hb_region_blocks_write(struct o2hb_region *reg,
+static ssize_t o2hb_region_blocks_store(struct config_item *item,
 					const char *page,
 					size_t count)
 {
+	struct o2hb_region *reg = to_o2hb_region(item);
 	unsigned long tmp;
 	char *p = (char *)page;
 
@@ -1561,13 +1563,12 @@ static ssize_t o2hb_region_blocks_write(struct o2hb_region *reg,
 	return count;
 }
 
-static ssize_t o2hb_region_dev_read(struct o2hb_region *reg,
-				    char *page)
+static ssize_t o2hb_region_dev_show(struct config_item *item, char *page)
 {
 	unsigned int ret = 0;
 
-	if (reg->hr_bdev)
-		ret = sprintf(page, "%s\n", reg->hr_dev_name);
+	if (to_o2hb_region(item)->hr_bdev)
+		ret = sprintf(page, "%s\n", to_o2hb_region(item)->hr_dev_name);
 
 	return ret;
 }
@@ -1677,10 +1678,11 @@ out:
 }
 
 /* this is acting as commit; we set up all of hr_bdev and hr_task or nothing */
-static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
+static ssize_t o2hb_region_dev_store(struct config_item *item,
 				     const char *page,
 				     size_t count)
 {
+	struct o2hb_region *reg = to_o2hb_region(item);
 	struct task_struct *hb_task;
 	long fd;
 	int sectsize;
@@ -1841,9 +1843,9 @@ out:
 	return ret;
 }
 
-static ssize_t o2hb_region_pid_read(struct o2hb_region *reg,
-                                      char *page)
+static ssize_t o2hb_region_pid_show(struct config_item *item, char *page)
 {
+	struct o2hb_region *reg = to_o2hb_region(item);
 	pid_t pid = 0;
 
 	spin_lock(&o2hb_live_lock);
@@ -1857,92 +1859,23 @@ static ssize_t o2hb_region_pid_read(struct o2hb_region *reg,
 	return sprintf(page, "%u\n", pid);
 }
 
-struct o2hb_region_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct o2hb_region *, char *);
-	ssize_t (*store)(struct o2hb_region *, const char *, size_t);
-};
-
-static struct o2hb_region_attribute o2hb_region_attr_block_bytes = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "block_bytes",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2hb_region_block_bytes_read,
-	.store	= o2hb_region_block_bytes_write,
-};
-
-static struct o2hb_region_attribute o2hb_region_attr_start_block = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "start_block",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2hb_region_start_block_read,
-	.store	= o2hb_region_start_block_write,
-};
-
-static struct o2hb_region_attribute o2hb_region_attr_blocks = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "blocks",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2hb_region_blocks_read,
-	.store	= o2hb_region_blocks_write,
-};
-
-static struct o2hb_region_attribute o2hb_region_attr_dev = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "dev",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2hb_region_dev_read,
-	.store	= o2hb_region_dev_write,
-};
-
-static struct o2hb_region_attribute o2hb_region_attr_pid = {
-       .attr   = { .ca_owner = THIS_MODULE,
-                   .ca_name = "pid",
-                   .ca_mode = S_IRUGO | S_IRUSR },
-       .show   = o2hb_region_pid_read,
-};
+CONFIGFS_ATTR(o2hb_region_, block_bytes);
+CONFIGFS_ATTR(o2hb_region_, start_block);
+CONFIGFS_ATTR(o2hb_region_, blocks);
+CONFIGFS_ATTR(o2hb_region_, dev);
+CONFIGFS_ATTR_RO(o2hb_region_, pid);
 
 static struct configfs_attribute *o2hb_region_attrs[] = {
-	&o2hb_region_attr_block_bytes.attr,
-	&o2hb_region_attr_start_block.attr,
-	&o2hb_region_attr_blocks.attr,
-	&o2hb_region_attr_dev.attr,
-	&o2hb_region_attr_pid.attr,
+	&o2hb_region_attr_block_bytes,
+	&o2hb_region_attr_start_block,
+	&o2hb_region_attr_blocks,
+	&o2hb_region_attr_dev,
+	&o2hb_region_attr_pid,
 	NULL,
 };
 
-static ssize_t o2hb_region_show(struct config_item *item,
-				struct configfs_attribute *attr,
-				char *page)
-{
-	struct o2hb_region *reg = to_o2hb_region(item);
-	struct o2hb_region_attribute *o2hb_region_attr =
-		container_of(attr, struct o2hb_region_attribute, attr);
-	ssize_t ret = 0;
-
-	if (o2hb_region_attr->show)
-		ret = o2hb_region_attr->show(reg, page);
-	return ret;
-}
-
-static ssize_t o2hb_region_store(struct config_item *item,
-				 struct configfs_attribute *attr,
-				 const char *page, size_t count)
-{
-	struct o2hb_region *reg = to_o2hb_region(item);
-	struct o2hb_region_attribute *o2hb_region_attr =
-		container_of(attr, struct o2hb_region_attribute, attr);
-	ssize_t ret = -EINVAL;
-
-	if (o2hb_region_attr->store)
-		ret = o2hb_region_attr->store(reg, page, count);
-	return ret;
-}
-
 static struct configfs_item_operations o2hb_region_item_ops = {
 	.release		= o2hb_region_release,
-	.show_attribute		= o2hb_region_show,
-	.store_attribute	= o2hb_region_store,
 };
 
 static struct config_item_type o2hb_region_type = {
@@ -2137,49 +2070,14 @@ unlock:
 	spin_unlock(&o2hb_live_lock);
 }
 
-struct o2hb_heartbeat_group_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct o2hb_heartbeat_group *, char *);
-	ssize_t (*store)(struct o2hb_heartbeat_group *, const char *, size_t);
-};
-
-static ssize_t o2hb_heartbeat_group_show(struct config_item *item,
-					 struct configfs_attribute *attr,
-					 char *page)
-{
-	struct o2hb_heartbeat_group *reg = to_o2hb_heartbeat_group(to_config_group(item));
-	struct o2hb_heartbeat_group_attribute *o2hb_heartbeat_group_attr =
-		container_of(attr, struct o2hb_heartbeat_group_attribute, attr);
-	ssize_t ret = 0;
-
-	if (o2hb_heartbeat_group_attr->show)
-		ret = o2hb_heartbeat_group_attr->show(reg, page);
-	return ret;
-}
-
-static ssize_t o2hb_heartbeat_group_store(struct config_item *item,
-					  struct configfs_attribute *attr,
-					  const char *page, size_t count)
-{
-	struct o2hb_heartbeat_group *reg = to_o2hb_heartbeat_group(to_config_group(item));
-	struct o2hb_heartbeat_group_attribute *o2hb_heartbeat_group_attr =
-		container_of(attr, struct o2hb_heartbeat_group_attribute, attr);
-	ssize_t ret = -EINVAL;
-
-	if (o2hb_heartbeat_group_attr->store)
-		ret = o2hb_heartbeat_group_attr->store(reg, page, count);
-	return ret;
-}
-
-static ssize_t o2hb_heartbeat_group_threshold_show(struct o2hb_heartbeat_group *group,
-						     char *page)
+static ssize_t o2hb_heartbeat_group_threshold_show(struct config_item *item,
+		char *page)
 {
 	return sprintf(page, "%u\n", o2hb_dead_threshold);
 }
 
-static ssize_t o2hb_heartbeat_group_threshold_store(struct o2hb_heartbeat_group *group,
-						    const char *page,
-						    size_t count)
+static ssize_t o2hb_heartbeat_group_threshold_store(struct config_item *item,
+		const char *page, size_t count)
 {
 	unsigned long tmp;
 	char *p = (char *)page;
@@ -2194,17 +2092,15 @@ static ssize_t o2hb_heartbeat_group_threshold_store(struct o2hb_heartbeat_group
 	return count;
 }
 
-static
-ssize_t o2hb_heartbeat_group_mode_show(struct o2hb_heartbeat_group *group,
-				       char *page)
+static ssize_t o2hb_heartbeat_group_mode_show(struct config_item *item,
+		char *page)
 {
 	return sprintf(page, "%s\n",
 		       o2hb_heartbeat_mode_desc[o2hb_heartbeat_mode]);
 }
 
-static
-ssize_t o2hb_heartbeat_group_mode_store(struct o2hb_heartbeat_group *group,
-					const char *page, size_t count)
+static ssize_t o2hb_heartbeat_group_mode_store(struct config_item *item,
+		const char *page, size_t count)
 {
 	unsigned int i;
 	int ret;
@@ -2229,33 +2125,15 @@ ssize_t o2hb_heartbeat_group_mode_store(struct o2hb_heartbeat_group *group,
 
 }
 
-static struct o2hb_heartbeat_group_attribute o2hb_heartbeat_group_attr_threshold = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "dead_threshold",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2hb_heartbeat_group_threshold_show,
-	.store	= o2hb_heartbeat_group_threshold_store,
-};
-
-static struct o2hb_heartbeat_group_attribute o2hb_heartbeat_group_attr_mode = {
-	.attr   = { .ca_owner = THIS_MODULE,
-		.ca_name = "mode",
-		.ca_mode = S_IRUGO | S_IWUSR },
-	.show   = o2hb_heartbeat_group_mode_show,
-	.store  = o2hb_heartbeat_group_mode_store,
-};
+CONFIGFS_ATTR(o2hb_heartbeat_group_, threshold);
+CONFIGFS_ATTR(o2hb_heartbeat_group_, mode);
 
 static struct configfs_attribute *o2hb_heartbeat_group_attrs[] = {
-	&o2hb_heartbeat_group_attr_threshold.attr,
-	&o2hb_heartbeat_group_attr_mode.attr,
+	&o2hb_heartbeat_group_attr_threshold,
+	&o2hb_heartbeat_group_attr_mode,
 	NULL,
 };
 
-static struct configfs_item_operations o2hb_heartbeat_group_item_ops = {
-	.show_attribute		= o2hb_heartbeat_group_show,
-	.store_attribute	= o2hb_heartbeat_group_store,
-};
-
 static struct configfs_group_operations o2hb_heartbeat_group_group_ops = {
 	.make_item	= o2hb_heartbeat_group_make_item,
 	.drop_item	= o2hb_heartbeat_group_drop_item,
@@ -2263,7 +2141,6 @@ static struct configfs_group_operations o2hb_heartbeat_group_group_ops = {
 
 static struct config_item_type o2hb_heartbeat_group_type = {
 	.ct_group_ops	= &o2hb_heartbeat_group_group_ops,
-	.ct_item_ops	= &o2hb_heartbeat_group_item_ops,
 	.ct_attrs	= o2hb_heartbeat_group_attrs,
 	.ct_owner	= THIS_MODULE,
 };
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index 441c84e169e6..72afdca3cea7 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -172,9 +172,9 @@ static void o2nm_node_release(struct config_item *item)
 	kfree(node);
 }
 
-static ssize_t o2nm_node_num_read(struct o2nm_node *node, char *page)
+static ssize_t o2nm_node_num_show(struct config_item *item, char *page)
 {
-	return sprintf(page, "%d\n", node->nd_num);
+	return sprintf(page, "%d\n", to_o2nm_node(item)->nd_num);
 }
 
 static struct o2nm_cluster *to_o2nm_cluster_from_node(struct o2nm_node *node)
@@ -188,15 +188,16 @@ enum {
 	O2NM_NODE_ATTR_NUM = 0,
 	O2NM_NODE_ATTR_PORT,
 	O2NM_NODE_ATTR_ADDRESS,
-	O2NM_NODE_ATTR_LOCAL,
 };
 
-static ssize_t o2nm_node_num_write(struct o2nm_node *node, const char *page,
+static ssize_t o2nm_node_num_store(struct config_item *item, const char *page,
 				   size_t count)
 {
+	struct o2nm_node *node = to_o2nm_node(item);
 	struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
 	unsigned long tmp;
 	char *p = (char *)page;
+	int ret = 0;
 
 	tmp = simple_strtoul(p, &p, 0);
 	if (!p || (*p && (*p != '\n')))
@@ -215,26 +216,30 @@ static ssize_t o2nm_node_num_write(struct o2nm_node *node, const char *page,
 
 	write_lock(&cluster->cl_nodes_lock);
 	if (cluster->cl_nodes[tmp])
-		p = NULL;
+		ret = -EEXIST;
+	else if (test_and_set_bit(O2NM_NODE_ATTR_NUM,
+			&node->nd_set_attributes))
+		ret = -EBUSY;
 	else  {
 		cluster->cl_nodes[tmp] = node;
 		node->nd_num = tmp;
 		set_bit(tmp, cluster->cl_nodes_bitmap);
 	}
 	write_unlock(&cluster->cl_nodes_lock);
-	if (p == NULL)
-		return -EEXIST;
+	if (ret)
+		return ret;
 
 	return count;
 }
-static ssize_t o2nm_node_ipv4_port_read(struct o2nm_node *node, char *page)
+static ssize_t o2nm_node_ipv4_port_show(struct config_item *item, char *page)
 {
-	return sprintf(page, "%u\n", ntohs(node->nd_ipv4_port));
+	return sprintf(page, "%u\n", ntohs(to_o2nm_node(item)->nd_ipv4_port));
 }
 
-static ssize_t o2nm_node_ipv4_port_write(struct o2nm_node *node,
+static ssize_t o2nm_node_ipv4_port_store(struct config_item *item,
 					 const char *page, size_t count)
 {
+	struct o2nm_node *node = to_o2nm_node(item);
 	unsigned long tmp;
 	char *p = (char *)page;
 
@@ -247,20 +252,23 @@ static ssize_t o2nm_node_ipv4_port_write(struct o2nm_node *node,
 	if (tmp >= (u16)-1)
 		return -ERANGE;
 
+	if (test_and_set_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
+		return -EBUSY;
 	node->nd_ipv4_port = htons(tmp);
 
 	return count;
 }
 
-static ssize_t o2nm_node_ipv4_address_read(struct o2nm_node *node, char *page)
+static ssize_t o2nm_node_ipv4_address_show(struct config_item *item, char *page)
 {
-	return sprintf(page, "%pI4\n", &node->nd_ipv4_address);
+	return sprintf(page, "%pI4\n", &to_o2nm_node(item)->nd_ipv4_address);
 }
 
-static ssize_t o2nm_node_ipv4_address_write(struct o2nm_node *node,
+static ssize_t o2nm_node_ipv4_address_store(struct config_item *item,
 					    const char *page,
 					    size_t count)
 {
+	struct o2nm_node *node = to_o2nm_node(item);
 	struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
 	int ret, i;
 	struct rb_node **p, *parent;
@@ -282,6 +290,9 @@ static ssize_t o2nm_node_ipv4_address_write(struct o2nm_node *node,
 	write_lock(&cluster->cl_nodes_lock);
 	if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent))
 		ret = -EEXIST;
+	else if (test_and_set_bit(O2NM_NODE_ATTR_ADDRESS,
+			&node->nd_set_attributes))
+		ret = -EBUSY;
 	else {
 		rb_link_node(&node->nd_ip_node, parent, p);
 		rb_insert_color(&node->nd_ip_node, &cluster->cl_node_ip_tree);
@@ -295,14 +306,15 @@ static ssize_t o2nm_node_ipv4_address_write(struct o2nm_node *node,
 	return count;
 }
 
-static ssize_t o2nm_node_local_read(struct o2nm_node *node, char *page)
+static ssize_t o2nm_node_local_show(struct config_item *item, char *page)
 {
-	return sprintf(page, "%d\n", node->nd_local);
+	return sprintf(page, "%d\n", to_o2nm_node(item)->nd_local);
 }
 
-static ssize_t o2nm_node_local_write(struct o2nm_node *node, const char *page,
+static ssize_t o2nm_node_local_store(struct config_item *item, const char *page,
 				     size_t count)
 {
+	struct o2nm_node *node = to_o2nm_node(item);
 	struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
 	unsigned long tmp;
 	char *p = (char *)page;
@@ -349,108 +361,21 @@ static ssize_t o2nm_node_local_write(struct o2nm_node *node, const char *page,
 	return count;
 }
 
-struct o2nm_node_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct o2nm_node *, char *);
-	ssize_t (*store)(struct o2nm_node *, const char *, size_t);
-};
-
-static struct o2nm_node_attribute o2nm_node_attr_num = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "num",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_node_num_read,
-	.store	= o2nm_node_num_write,
-};
-
-static struct o2nm_node_attribute o2nm_node_attr_ipv4_port = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "ipv4_port",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_node_ipv4_port_read,
-	.store	= o2nm_node_ipv4_port_write,
-};
-
-static struct o2nm_node_attribute o2nm_node_attr_ipv4_address = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "ipv4_address",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_node_ipv4_address_read,
-	.store	= o2nm_node_ipv4_address_write,
-};
-
-static struct o2nm_node_attribute o2nm_node_attr_local = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "local",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_node_local_read,
-	.store	= o2nm_node_local_write,
-};
+CONFIGFS_ATTR(o2nm_node_, num);
+CONFIGFS_ATTR(o2nm_node_, ipv4_port);
+CONFIGFS_ATTR(o2nm_node_, ipv4_address);
+CONFIGFS_ATTR(o2nm_node_, local);
 
 static struct configfs_attribute *o2nm_node_attrs[] = {
-	[O2NM_NODE_ATTR_NUM] = &o2nm_node_attr_num.attr,
-	[O2NM_NODE_ATTR_PORT] = &o2nm_node_attr_ipv4_port.attr,
-	[O2NM_NODE_ATTR_ADDRESS] = &o2nm_node_attr_ipv4_address.attr,
-	[O2NM_NODE_ATTR_LOCAL] = &o2nm_node_attr_local.attr,
+	&o2nm_node_attr_num,
+	&o2nm_node_attr_ipv4_port,
+	&o2nm_node_attr_ipv4_address,
+	&o2nm_node_attr_local,
 	NULL,
 };
 
-static int o2nm_attr_index(struct configfs_attribute *attr)
-{
-	int i;
-	for (i = 0; i < ARRAY_SIZE(o2nm_node_attrs); i++) {
-		if (attr == o2nm_node_attrs[i])
-			return i;
-	}
-	BUG();
-	return 0;
-}
-
-static ssize_t o2nm_node_show(struct config_item *item,
-			      struct configfs_attribute *attr,
-			      char *page)
-{
-	struct o2nm_node *node = to_o2nm_node(item);
-	struct o2nm_node_attribute *o2nm_node_attr =
-		container_of(attr, struct o2nm_node_attribute, attr);
-	ssize_t ret = 0;
-
-	if (o2nm_node_attr->show)
-		ret = o2nm_node_attr->show(node, page);
-	return ret;
-}
-
-static ssize_t o2nm_node_store(struct config_item *item,
-			       struct configfs_attribute *attr,
-			       const char *page, size_t count)
-{
-	struct o2nm_node *node = to_o2nm_node(item);
-	struct o2nm_node_attribute *o2nm_node_attr =
-		container_of(attr, struct o2nm_node_attribute, attr);
-	ssize_t ret;
-	int attr_index = o2nm_attr_index(attr);
-
-	if (o2nm_node_attr->store == NULL) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (test_bit(attr_index, &node->nd_set_attributes))
-		return -EBUSY;
-
-	ret = o2nm_node_attr->store(node, page, count);
-	if (ret < count)
-		goto out;
-
-	set_bit(attr_index, &node->nd_set_attributes);
-out:
-	return ret;
-}
-
 static struct configfs_item_operations o2nm_node_item_ops = {
 	.release		= o2nm_node_release,
-	.show_attribute		= o2nm_node_show,
-	.store_attribute	= o2nm_node_store,
 };
 
 static struct config_item_type o2nm_node_type = {
@@ -475,12 +400,6 @@ static struct o2nm_node_group *to_o2nm_node_group(struct config_group *group)
 }
 #endif
 
-struct o2nm_cluster_attribute {
-	struct configfs_attribute attr;
-	ssize_t (*show)(struct o2nm_cluster *, char *);
-	ssize_t (*store)(struct o2nm_cluster *, const char *, size_t);
-};
-
 static ssize_t o2nm_cluster_attr_write(const char *page, ssize_t count,
                                        unsigned int *val)
 {
@@ -501,15 +420,16 @@ static ssize_t o2nm_cluster_attr_write(const char *page, ssize_t count,
 	return count;
 }
 
-static ssize_t o2nm_cluster_attr_idle_timeout_ms_read(
-	struct o2nm_cluster *cluster, char *page)
+static ssize_t o2nm_cluster_idle_timeout_ms_show(struct config_item *item,
+	char *page)
 {
-	return sprintf(page, "%u\n", cluster->cl_idle_timeout_ms);
+	return sprintf(page, "%u\n", to_o2nm_cluster(item)->cl_idle_timeout_ms);
 }
 
-static ssize_t o2nm_cluster_attr_idle_timeout_ms_write(
-	struct o2nm_cluster *cluster, const char *page, size_t count)
+static ssize_t o2nm_cluster_idle_timeout_ms_store(struct config_item *item,
+	const char *page, size_t count)
 {
+	struct o2nm_cluster *cluster = to_o2nm_cluster(item);
 	ssize_t ret;
 	unsigned int val;
 
@@ -536,15 +456,17 @@ static ssize_t o2nm_cluster_attr_idle_timeout_ms_write(
 	return ret;
 }
 
-static ssize_t o2nm_cluster_attr_keepalive_delay_ms_read(
-	struct o2nm_cluster *cluster, char *page)
+static ssize_t o2nm_cluster_keepalive_delay_ms_show(
+	struct config_item *item, char *page)
 {
-	return sprintf(page, "%u\n", cluster->cl_keepalive_delay_ms);
+	return sprintf(page, "%u\n",
+			to_o2nm_cluster(item)->cl_keepalive_delay_ms);
 }
 
-static ssize_t o2nm_cluster_attr_keepalive_delay_ms_write(
-	struct o2nm_cluster *cluster, const char *page, size_t count)
+static ssize_t o2nm_cluster_keepalive_delay_ms_store(
+	struct config_item *item, const char *page, size_t count)
 {
+	struct o2nm_cluster *cluster = to_o2nm_cluster(item);
 	ssize_t ret;
 	unsigned int val;
 
@@ -571,22 +493,24 @@ static ssize_t o2nm_cluster_attr_keepalive_delay_ms_write(
 	return ret;
 }
 
-static ssize_t o2nm_cluster_attr_reconnect_delay_ms_read(
-	struct o2nm_cluster *cluster, char *page)
+static ssize_t o2nm_cluster_reconnect_delay_ms_show(
+	struct config_item *item, char *page)
 {
-	return sprintf(page, "%u\n", cluster->cl_reconnect_delay_ms);
+	return sprintf(page, "%u\n",
+			to_o2nm_cluster(item)->cl_reconnect_delay_ms);
 }
 
-static ssize_t o2nm_cluster_attr_reconnect_delay_ms_write(
-	struct o2nm_cluster *cluster, const char *page, size_t count)
+static ssize_t o2nm_cluster_reconnect_delay_ms_store(
+	struct config_item *item, const char *page, size_t count)
 {
 	return o2nm_cluster_attr_write(page, count,
-	                               &cluster->cl_reconnect_delay_ms);
+                               &to_o2nm_cluster(item)->cl_reconnect_delay_ms);
 }
 
-static ssize_t o2nm_cluster_attr_fence_method_read(
-	struct o2nm_cluster *cluster, char *page)
+static ssize_t o2nm_cluster_fence_method_show(
+	struct config_item *item, char *page)
 {
+	struct o2nm_cluster *cluster = to_o2nm_cluster(item);
 	ssize_t ret = 0;
 
 	if (cluster)
@@ -595,8 +519,8 @@ static ssize_t o2nm_cluster_attr_fence_method_read(
 	return ret;
 }
 
-static ssize_t o2nm_cluster_attr_fence_method_write(
-	struct o2nm_cluster *cluster, const char *page, size_t count)
+static ssize_t o2nm_cluster_fence_method_store(
+	struct config_item *item, const char *page, size_t count)
 {
 	unsigned int i;
 
@@ -608,10 +532,10 @@ static ssize_t o2nm_cluster_attr_fence_method_write(
 			continue;
 		if (strncasecmp(page, o2nm_fence_method_desc[i], count - 1))
 			continue;
-		if (cluster->cl_fence_method != i) {
+		if (to_o2nm_cluster(item)->cl_fence_method != i) {
 			printk(KERN_INFO "ocfs2: Changing fence method to %s\n",
 			       o2nm_fence_method_desc[i]);
-			cluster->cl_fence_method = i;
+			to_o2nm_cluster(item)->cl_fence_method = i;
 		}
 		return count;
 	}
@@ -620,79 +544,18 @@ bail:
 	return -EINVAL;
 }
 
-static struct o2nm_cluster_attribute o2nm_cluster_attr_idle_timeout_ms = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "idle_timeout_ms",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_cluster_attr_idle_timeout_ms_read,
-	.store	= o2nm_cluster_attr_idle_timeout_ms_write,
-};
-
-static struct o2nm_cluster_attribute o2nm_cluster_attr_keepalive_delay_ms = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "keepalive_delay_ms",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_cluster_attr_keepalive_delay_ms_read,
-	.store	= o2nm_cluster_attr_keepalive_delay_ms_write,
-};
-
-static struct o2nm_cluster_attribute o2nm_cluster_attr_reconnect_delay_ms = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "reconnect_delay_ms",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_cluster_attr_reconnect_delay_ms_read,
-	.store	= o2nm_cluster_attr_reconnect_delay_ms_write,
-};
-
-static struct o2nm_cluster_attribute o2nm_cluster_attr_fence_method = {
-	.attr	= { .ca_owner = THIS_MODULE,
-		    .ca_name = "fence_method",
-		    .ca_mode = S_IRUGO | S_IWUSR },
-	.show	= o2nm_cluster_attr_fence_method_read,
-	.store	= o2nm_cluster_attr_fence_method_write,
-};
+CONFIGFS_ATTR(o2nm_cluster_, idle_timeout_ms);
+CONFIGFS_ATTR(o2nm_cluster_, keepalive_delay_ms);
+CONFIGFS_ATTR(o2nm_cluster_, reconnect_delay_ms);
+CONFIGFS_ATTR(o2nm_cluster_, fence_method);
 
 static struct configfs_attribute *o2nm_cluster_attrs[] = {
-	&o2nm_cluster_attr_idle_timeout_ms.attr,
-	&o2nm_cluster_attr_keepalive_delay_ms.attr,
-	&o2nm_cluster_attr_reconnect_delay_ms.attr,
-	&o2nm_cluster_attr_fence_method.attr,
+	&o2nm_cluster_attr_idle_timeout_ms,
+	&o2nm_cluster_attr_keepalive_delay_ms,
+	&o2nm_cluster_attr_reconnect_delay_ms,
+	&o2nm_cluster_attr_fence_method,
 	NULL,
 };
-static ssize_t o2nm_cluster_show(struct config_item *item,
-                                 struct configfs_attribute *attr,
-                                 char *page)
-{
-	struct o2nm_cluster *cluster = to_o2nm_cluster(item);
-	struct o2nm_cluster_attribute *o2nm_cluster_attr =
-		container_of(attr, struct o2nm_cluster_attribute, attr);
-	ssize_t ret = 0;
-
-	if (o2nm_cluster_attr->show)
-		ret = o2nm_cluster_attr->show(cluster, page);
-	return ret;
-}
-
-static ssize_t o2nm_cluster_store(struct config_item *item,
-                                  struct configfs_attribute *attr,
-                                  const char *page, size_t count)
-{
-	struct o2nm_cluster *cluster = to_o2nm_cluster(item);
-	struct o2nm_cluster_attribute *o2nm_cluster_attr =
-		container_of(attr, struct o2nm_cluster_attribute, attr);
-	ssize_t ret;
-
-	if (o2nm_cluster_attr->store == NULL) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	ret = o2nm_cluster_attr->store(cluster, page, count);
-	if (ret < count)
-		goto out;
-out:
-	return ret;
-}
 
 static struct config_item *o2nm_node_group_make_item(struct config_group *group,
 						     const char *name)
@@ -773,8 +636,6 @@ static void o2nm_cluster_release(struct config_item *item)
 
 static struct configfs_item_operations o2nm_cluster_item_ops = {
 	.release	= o2nm_cluster_release,
-	.show_attribute		= o2nm_cluster_show,
-	.store_attribute	= o2nm_cluster_store,
 };
 
 static struct config_item_type o2nm_cluster_type = {