drbd: Move susp, susp_nod, susp_fen from connection to resource

Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>

drivers/block/drbd/drbd_int.h

@@ -580,6 +580,10 @@ struct drbd_resource {
 	struct res_opts res_opts;
 	struct mutex conf_update;	/* mutex for ready-copy-update of net_conf and disk_conf */
 	spinlock_t req_lock;
+
+	unsigned susp:1;		/* IO suspended by user */
+	unsigned susp_nod:1;		/* IO suspended because no data */
+	unsigned susp_fen:1;		/* IO suspended because fence peer handler runs */
 };
 
 struct drbd_connection {
@@ -588,9 +592,6 @@ struct drbd_connection {
 	struct kref kref;
 	struct idr peer_devices;	/* volume number to peer device mapping */
 	enum drbd_conns cstate;		/* Only C_STANDALONE to C_WF_REPORT_PARAMS */
-	unsigned susp:1;		/* IO suspended by user */
-	unsigned susp_nod:1;		/* IO suspended because no data */
-	unsigned susp_fen:1;		/* IO suspended because fence peer handler runs */
 	struct mutex cstate_mutex;	/* Protects graceful disconnects */
 	unsigned int connect_cnt;	/* Inc each time a connection is established */
 
@@ -1507,12 +1508,13 @@ _drbd_set_state(struct drbd_device *device, union drbd_state ns,
 
 static inline union drbd_state drbd_read_state(struct drbd_device *device)
 {
+	struct drbd_resource *resource = device->resource;
 	union drbd_state rv;
 
 	rv.i = device->state.i;
-	rv.susp = first_peer_device(device)->connection->susp;
-	rv.susp_nod = first_peer_device(device)->connection->susp_nod;
-	rv.susp_fen = first_peer_device(device)->connection->susp_fen;
+	rv.susp = resource->susp;
+	rv.susp_nod = resource->susp_nod;
+	rv.susp_fen = resource->susp_fen;
 
 	return rv;
 }
@@ -2033,9 +2035,9 @@ static inline int drbd_state_is_stable(struct drbd_device *device)
 
 static inline int drbd_suspended(struct drbd_device *device)
 {
-	struct drbd_connection *connection = first_peer_device(device)->connection;
+	struct drbd_resource *resource = device->resource;
 
-	return connection->susp || connection->susp_fen || connection->susp_nod;
+	return resource->susp || resource->susp_fen || resource->susp_nod;
 }
 
 static inline bool may_inc_ap_bio(struct drbd_device *device)

drivers/block/drbd/drbd_main.c

@@ -2534,7 +2534,7 @@ struct drbd_resource *drbd_create_resource(const char *name)
 {
 	struct drbd_resource *resource;
 
-	resource = kmalloc(sizeof(struct drbd_resource), GFP_KERNEL);
+	resource = kzalloc(sizeof(struct drbd_resource), GFP_KERNEL);
 	if (!resource)
 		return NULL;
 	resource->name = kstrdup(name, GFP_KERNEL);

drivers/block/drbd/drbd_nl.c

@@ -1665,8 +1665,7 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
 		clear_bit(CRASHED_PRIMARY, &device->flags);
 
 	if (drbd_md_test_flag(device->ldev, MDF_PRIMARY_IND) &&
-	    !(device->state.role == R_PRIMARY &&
-	      first_peer_device(device)->connection->susp_nod))
+	    !(device->state.role == R_PRIMARY && device->resource->susp_nod))
 		set_bit(CRASHED_PRIMARY, &device->flags);
 
 	device->send_cnt = 0;

drivers/block/drbd/drbd_state.c

@@ -1008,9 +1008,9 @@ __drbd_set_state(struct drbd_device *device, union drbd_state ns,
 	did_remote = drbd_should_do_remote(device->state);
 	device->state.i = ns.i;
 	should_do_remote = drbd_should_do_remote(device->state);
-	first_peer_device(device)->connection->susp = ns.susp;
-	first_peer_device(device)->connection->susp_nod = ns.susp_nod;
-	first_peer_device(device)->connection->susp_fen = ns.susp_fen;
+	device->resource->susp = ns.susp;
+	device->resource->susp_nod = ns.susp_nod;
+	device->resource->susp_fen = ns.susp_fen;
 
 	/* put replicated vs not-replicated requests in seperate epochs */
 	if (did_remote != should_do_remote)
@@ -1219,6 +1219,7 @@ int drbd_bitmap_io_from_worker(struct drbd_device *device,
 static void after_state_ch(struct drbd_device *device, union drbd_state os,
 			   union drbd_state ns, enum chg_state_flags flags)
 {
+	struct drbd_resource *resource = device->resource;
 	struct sib_info sib;
 
 	sib.sib_reason = SIB_STATE_CHANGE;
@@ -1253,7 +1254,7 @@ static void after_state_ch(struct drbd_device *device, union drbd_state os,
 		    conn_lowest_disk(connection) > D_NEGOTIATING)
 			what = RESTART_FROZEN_DISK_IO;
 
-		if (connection->susp_nod && what != NOTHING) {
+		if (resource->susp_nod && what != NOTHING) {
 			_tl_restart(connection, what);
 			_conn_request_state(connection,
 					    (union drbd_state) { { .susp_nod = 1 } },
@@ -1267,7 +1268,7 @@ static void after_state_ch(struct drbd_device *device, union drbd_state os,
 		struct drbd_connection *connection = first_peer_device(device)->connection;
 
 		spin_lock_irq(&device->resource->req_lock);
-		if (connection->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) {
+		if (resource->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) {
 			/* case2: The connection was established again: */
 			struct drbd_peer_device *peer_device;
 			int vnr;
@@ -1750,9 +1751,9 @@ conn_set_state(struct drbd_connection *connection, union drbd_state mask, union
 			} };
 	}
 
-	ns_min.susp = ns_max.susp = connection->susp;
-	ns_min.susp_nod = ns_max.susp_nod = connection->susp_nod;
-	ns_min.susp_fen = ns_max.susp_fen = connection->susp_fen;
+	ns_min.susp = ns_max.susp = connection->resource->susp;
+	ns_min.susp_nod = ns_max.susp_nod = connection->resource->susp_nod;
+	ns_min.susp_fen = ns_max.susp_fen = connection->resource->susp_fen;
 
 	*pns_min = ns_min;
 	*pns_max = ns_max;