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Commit 4d8642d8 authored by Jon Paul Maloy's avatar Jon Paul Maloy Committed by David S. Miller
Browse files

tipc: modify struct tipc_plist to be more versatile 



During multicast reception we currently use a simple linked list with
push/pop semantics to store port numbers.

We now see a need for a more generic list for storing values of type
u32. We therefore make some modifications to this list, while replacing
the prefix 'tipc_plist_' with 'u32_'. We also add a couple of new
functions which will come to use in the next commits.

Acked-by: default avatarParthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Acked-by: default avatarYing Xue <ying.xue@windriver.com>
Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8c44e1af

net/tipc/name_table.c

+72 −28
Original line number Diff line number Diff line
@@ -608,7 +608,7 @@ u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, 
 * Returns non-zero if any off-node ports overlap

 */

int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper,

			      u32 limit, struct tipc_plist *dports)

			      u32 limit, struct list_head *dports)

{

	struct name_seq *seq;

	struct sub_seq *sseq;
@@ -633,7 +633,7 @@ int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper, 
		info = sseq->info;

		list_for_each_entry(publ, &info->node_list, node_list) {

			if (publ->scope <= limit)

				tipc_plist_push(dports, publ->ref);

				u32_push(dports, publ->ref);

		}



		if (info->cluster_list_size != info->node_list_size)
@@ -1022,40 +1022,84 @@ int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb) 
	return skb->len;

}



void tipc_plist_push(struct tipc_plist *pl, u32 port)

struct u32_item {

	struct list_head list;

	u32 value;

};



bool u32_find(struct list_head *l, u32 value)

{

	struct tipc_plist *nl;

	struct u32_item *item;



	if (likely(!pl->port)) {

		pl->port = port;

		return;

	list_for_each_entry(item, l, list) {

		if (item->value == value)

			return true;

	}

	if (pl->port == port)

		return;

	list_for_each_entry(nl, &pl->list, list) {

		if (nl->port == port)

			return;

	return false;

}



bool u32_push(struct list_head *l, u32 value)

{

	struct u32_item *item;



	list_for_each_entry(item, l, list) {

		if (item->value == value)

			return false;

	}

	nl = kmalloc(sizeof(*nl), GFP_ATOMIC);

	if (nl) {

		nl->port = port;

		list_add(&nl->list, &pl->list);

	item = kmalloc(sizeof(*item), GFP_ATOMIC);

	if (unlikely(!item))

		return false;



	item->value = value;

	list_add(&item->list, l);

	return true;

}



u32 u32_pop(struct list_head *l)

{

	struct u32_item *item;

	u32 value = 0;



	if (list_empty(l))

		return 0;

	item = list_first_entry(l, typeof(*item), list);

	value = item->value;

	list_del(&item->list);

	kfree(item);

	return value;

}



u32 tipc_plist_pop(struct tipc_plist *pl)

bool u32_del(struct list_head *l, u32 value)

{

	struct tipc_plist *nl;

	u32 port = 0;



	if (likely(list_empty(&pl->list))) {

		port = pl->port;

		pl->port = 0;

		return port;

	}

	nl = list_first_entry(&pl->list, typeof(*nl), list);

	port = nl->port;

	list_del(&nl->list);

	kfree(nl);

	return port;

	struct u32_item *item, *tmp;



	list_for_each_entry_safe(item, tmp, l, list) {

		if (item->value != value)

			continue;

		list_del(&item->list);

		kfree(item);

		return true;

	}

	return false;

}



void u32_list_purge(struct list_head *l)

{

	struct u32_item *item, *tmp;



	list_for_each_entry_safe(item, tmp, l, list) {

		list_del(&item->list);

		kfree(item);

	}

}



int u32_list_len(struct list_head *l)

{

	struct u32_item *item;

	int i = 0;



	list_for_each_entry(item, l, list) {

		i++;

	}

	return i;

}

net/tipc/name_table.h

+7 −14
Original line number Diff line number Diff line
@@ -99,7 +99,7 @@ int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb); 


u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *node);

int tipc_nametbl_mc_translate(struct net *net, u32 type, u32 lower, u32 upper,

			      u32 limit, struct tipc_plist *dports);

			      u32 limit, struct list_head *dports);

struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower,

					 u32 upper, u32 scope, u32 port_ref,

					 u32 key);
@@ -116,18 +116,11 @@ void tipc_nametbl_unsubscribe(struct tipc_subscription *s); 
int tipc_nametbl_init(struct net *net);

void tipc_nametbl_stop(struct net *net);



struct tipc_plist {

	struct list_head list;

	u32 port;

};



static inline void tipc_plist_init(struct tipc_plist *pl)

{

	INIT_LIST_HEAD(&pl->list);

	pl->port = 0;

}



void tipc_plist_push(struct tipc_plist *pl, u32 port);

u32 tipc_plist_pop(struct tipc_plist *pl);

bool u32_push(struct list_head *l, u32 value);

u32 u32_pop(struct list_head *l);

bool u32_find(struct list_head *l, u32 value);

bool u32_del(struct list_head *l, u32 value);

void u32_list_purge(struct list_head *l);

int u32_list_len(struct list_head *l);



#endif

net/tipc/socket.c

+4 −4
Original line number Diff line number Diff line
@@ -788,7 +788,7 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, 
		       struct sk_buff_head *inputq)

{

	struct tipc_msg *msg;

	struct tipc_plist dports;

	struct list_head dports;

	u32 portid;

	u32 scope = TIPC_CLUSTER_SCOPE;

	struct sk_buff_head tmpq;
@@ -796,7 +796,7 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, 
	struct sk_buff *skb, *_skb;



	__skb_queue_head_init(&tmpq);

	tipc_plist_init(&dports);

	INIT_LIST_HEAD(&dports);



	skb = tipc_skb_peek(arrvq, &inputq->lock);

	for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) {
@@ -810,8 +810,8 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, 
		tipc_nametbl_mc_translate(net,

					  msg_nametype(msg), msg_namelower(msg),

					  msg_nameupper(msg), scope, &dports);

		portid = tipc_plist_pop(&dports);

		for (; portid; portid = tipc_plist_pop(&dports)) {

		portid = u32_pop(&dports);

		for (; portid; portid = u32_pop(&dports)) {

			_skb = __pskb_copy(skb, hsz, GFP_ATOMIC);

			if (_skb) {

				msg_set_destport(buf_msg(_skb), portid);