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Commit b6f85ef9 authored by Andreas Gruenbacher's avatar Andreas Gruenbacher Committed by Philipp Reisner
Browse files

drbd: Iterate over all connections 



in drbd_adm_down(), drbd_create_device() and drbd_set_role()

Signed-off-by: default avatarAndreas Gruenbacher <agruen@linbit.com>
Signed-off-by: default avatarPhilipp Reisner <philipp.reisner@linbit.com>
parent 270eb5c9

drivers/block/drbd/drbd_main.c

+33 −22
Original line number Diff line number Diff line
@@ -2661,9 +2661,9 @@ static int init_submitter(struct drbd_device *device) 


enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned int minor, int vnr)

{

	struct drbd_connection *connection = first_connection(resource);

	struct drbd_connection *connection;

	struct drbd_device *device;

	struct drbd_peer_device *peer_device;

	struct drbd_peer_device *peer_device, *tmp_peer_device;

	struct gendisk *disk;

	struct request_queue *q;

	int id;
@@ -2679,18 +2679,8 @@ enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned i 
		return ERR_NOMEM;

	kref_init(&device->kref);



	peer_device = kzalloc(sizeof(struct drbd_peer_device), GFP_KERNEL);

	if (!peer_device)

		goto out_no_peer_device;



	INIT_LIST_HEAD(&device->peer_devices);

	list_add(&peer_device->peer_devices, &device->peer_devices);

	kref_get(&resource->kref);

	device->resource = resource;

	kref_get(&connection->kref);

	peer_device->connection = connection;

	peer_device->device = device;



	device->minor = minor;

	device->vnr = vnr;
@@ -2761,6 +2751,17 @@ enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned i 
	}

	kref_get(&device->kref);



	INIT_LIST_HEAD(&device->peer_devices);

	for_each_connection(connection, resource) {

		peer_device = kzalloc(sizeof(struct drbd_peer_device), GFP_KERNEL);

		if (!peer_device)

			goto out_idr_remove_from_resource;

		peer_device->connection = connection;

		peer_device->device = device;



		list_add(&peer_device->peer_devices, &device->peer_devices);

		kref_get(&device->kref);



		id = idr_alloc(&connection->peer_devices, peer_device, vnr, vnr + 1, GFP_KERNEL);

		if (id < 0) {

			if (id == -ENOSPC) {
@@ -2769,7 +2770,8 @@ enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned i 
			}

			goto out_idr_remove_from_resource;

		}

	kref_get(&device->kref);

		kref_get(&connection->kref);

	}



	if (init_submitter(device)) {

		err = ERR_NOMEM;
@@ -2780,7 +2782,7 @@ enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned i 
	add_disk(disk);



	/* inherit the connection state */

	device->state.conn = connection->cstate;

	device->state.conn = first_connection(resource)->cstate;

	if (device->state.conn == C_WF_REPORT_PARAMS)

		drbd_connected(device);
@@ -2789,6 +2791,17 @@ enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned i 
out_idr_remove_vol:

	idr_remove(&connection->peer_devices, vnr);

out_idr_remove_from_resource:

	for_each_connection(connection, resource) {

		peer_device = idr_find(&connection->peer_devices, vnr);

		if (peer_device) {

			idr_remove(&connection->peer_devices, vnr);

			kref_put(&connection->kref, drbd_destroy_connection);

		}

	}

	for_each_peer_device_safe(peer_device, tmp_peer_device, device) {

		list_del(&peer_device->peer_devices);

		kfree(peer_device);

	}

	idr_remove(&resource->devices, vnr);

out_idr_remove_minor:

	idr_remove(&drbd_devices, minor);
@@ -2802,9 +2815,7 @@ enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned i 
out_no_disk:

	blk_cleanup_queue(q);

out_no_q:

	kref_put(&connection->kref, drbd_destroy_connection);

	kref_put(&resource->kref, drbd_destroy_resource);

out_no_peer_device:

	kfree(device);

	return err;

}

drivers/block/drbd/drbd_nl.c

+37 −31
Original line number Diff line number Diff line
@@ -560,8 +560,16 @@ drbd_set_role(struct drbd_device *device, enum drbd_role new_role, int force) 
	int forced = 0;

	union drbd_state mask, val;



	if (new_role == R_PRIMARY)

		request_ping(first_peer_device(device)->connection); /* Detect a dead peer ASAP */

	if (new_role == R_PRIMARY) {

		struct drbd_connection *connection;



		/* Detect dead peers as soon as possible.  */



		rcu_read_lock();

		for_each_connection(connection, device->resource)

			request_ping(connection);

		rcu_read_unlock();

	}



	mutex_lock(device->state_mutex);
@@ -3387,8 +3395,10 @@ int drbd_adm_del_minor(struct sk_buff *skb, struct genl_info *info) 


int drbd_adm_down(struct sk_buff *skb, struct genl_info *info)

{

	struct drbd_resource *resource;

	struct drbd_connection *connection;

	struct drbd_device *device;

	int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */

	struct drbd_peer_device *peer_device;

	unsigned i;



	retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_RESOURCE);
@@ -3397,8 +3407,12 @@ int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) 
	if (retcode != NO_ERROR)

		goto out;



	resource = adm_ctx.resource;

	/* demote */

	idr_for_each_entry(&adm_ctx.connection->peer_devices, peer_device, i) {

	for_each_connection(connection, resource) {

		struct drbd_peer_device *peer_device;



		idr_for_each_entry(&connection->peer_devices, peer_device, i) {

			retcode = drbd_set_role(peer_device->device, R_SECONDARY, 0);

			if (retcode < SS_SUCCESS) {

				drbd_msg_put_info("failed to demote");
@@ -3406,15 +3420,16 @@ int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) 
			}

		}



	retcode = conn_try_disconnect(adm_ctx.connection, 0);

		retcode = conn_try_disconnect(connection, 0);

		if (retcode < SS_SUCCESS) {

			drbd_msg_put_info("failed to disconnect");

			goto out;

		}

	}



	/* detach */

	idr_for_each_entry(&adm_ctx.connection->peer_devices, peer_device, i) {

		retcode = adm_detach(peer_device->device, 0);

	idr_for_each_entry(&resource->devices, device, i) {

		retcode = adm_detach(device, 0);

		if (retcode < SS_SUCCESS || retcode > NO_ERROR) {

			drbd_msg_put_info("failed to detach");

			goto out;
@@ -3424,13 +3439,14 @@ int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) 
	/* If we reach this, all volumes (of this connection) are Secondary,

	 * Disconnected, Diskless, aka Unconfigured. Make sure all threads have

	 * actually stopped, state handling only does drbd_thread_stop_nowait(). */

	drbd_thread_stop(&adm_ctx.connection->worker);

	for_each_connection(connection, resource)

		drbd_thread_stop(&connection->worker);



	/* Now, nothing can fail anymore */



	/* delete volumes */

	idr_for_each_entry(&adm_ctx.connection->peer_devices, peer_device, i) {

		retcode = adm_del_minor(peer_device->device);

	idr_for_each_entry(&resource->devices, device, i) {

		retcode = adm_del_minor(device);

		if (retcode != NO_ERROR) {

			/* "can not happen" */

			drbd_msg_put_info("failed to delete volume");
@@ -3438,21 +3454,11 @@ int drbd_adm_down(struct sk_buff *skb, struct genl_info *info) 
		}

	}



	/* delete connection */

	if (conn_lowest_minor(adm_ctx.connection) < 0) {

		struct drbd_resource *resource = adm_ctx.connection->resource;



	list_del_rcu(&resource->resources);

	synchronize_rcu();

	drbd_free_resource(resource);



	retcode = NO_ERROR;

	} else {

		/* "can not happen" */

		retcode = ERR_RES_IN_USE;

		drbd_msg_put_info("failed to delete connection");

	}

	goto out;



out:

	drbd_adm_finish(info, retcode);

	return 0;