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Commit 38266ca1 authored by Jon Maloy's avatar Jon Maloy Committed by David S. Miller
Browse files

tipc: some clarifying name changes 



We rename some functions and variables, to make their purpose clearer.

- tipc_group::congested -> tipc_group::small_win. Members in this list
  are not necessarily (and typically) congested. Instead, they may
  *potentially* be subject to congestion because their send window is
  less than ADV_IDLE, and therefore need to be checked during message
  transmission.

- tipc_group_is_receiver() -> tipc_group_is_sender(). This socket will
  accept messages coming from members fulfilling this condition, i.e.,
  they are senders from this member's viewpoint.

- tipc_group_is_enabled() -> tipc_group_is_receiver(). Members
  fulfilling this condition will accept messages sent from the current
  socket, i.e., they are receivers from its viewpoint.

There are no functional changes in this commit.

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 a31e795a

net/tipc/group.c

+23 −23
Original line number Diff line number Diff line
@@ -64,7 +64,7 @@ enum mbr_state { 
struct tipc_member {

	struct rb_node tree_node;

	struct list_head list;

	struct list_head congested;

	struct list_head small_win;

	struct sk_buff *event_msg;

	struct sk_buff_head deferredq;

	struct tipc_group *group;
@@ -82,7 +82,7 @@ struct tipc_member { 


struct tipc_group {

	struct rb_root members;

	struct list_head congested;

	struct list_head small_win;

	struct list_head pending;

	struct list_head active;

	struct list_head reclaiming;
@@ -136,12 +136,12 @@ u16 tipc_group_bc_snd_nxt(struct tipc_group *grp) 
	return grp->bc_snd_nxt;

}



static bool tipc_group_is_enabled(struct tipc_member *m)

static bool tipc_group_is_receiver(struct tipc_member *m)

{

	return m->state != MBR_QUARANTINED && m->state != MBR_LEAVING;

}



static bool tipc_group_is_receiver(struct tipc_member *m)

static bool tipc_group_is_sender(struct tipc_member *m)

{

	return m && m->state >= MBR_JOINED;

}
@@ -168,7 +168,7 @@ struct tipc_group *tipc_group_create(struct net *net, u32 portid, 
	if (!grp)

		return NULL;

	tipc_nlist_init(&grp->dests, tipc_own_addr(net));

	INIT_LIST_HEAD(&grp->congested);

	INIT_LIST_HEAD(&grp->small_win);

	INIT_LIST_HEAD(&grp->active);

	INIT_LIST_HEAD(&grp->pending);

	INIT_LIST_HEAD(&grp->reclaiming);
@@ -232,7 +232,7 @@ static struct tipc_member *tipc_group_find_dest(struct tipc_group *grp, 
	struct tipc_member *m;



	m = tipc_group_find_member(grp, node, port);

	if (m && tipc_group_is_enabled(m))

	if (m && tipc_group_is_receiver(m))

		return m;

	return NULL;

}
@@ -285,7 +285,7 @@ static struct tipc_member *tipc_group_create_member(struct tipc_group *grp, 
	if (!m)

		return NULL;

	INIT_LIST_HEAD(&m->list);

	INIT_LIST_HEAD(&m->congested);

	INIT_LIST_HEAD(&m->small_win);

	__skb_queue_head_init(&m->deferredq);

	m->group = grp;

	m->node = node;
@@ -314,7 +314,7 @@ static void tipc_group_delete_member(struct tipc_group *grp, 
		grp->bc_ackers--;



	list_del_init(&m->list);

	list_del_init(&m->congested);

	list_del_init(&m->small_win);

	tipc_group_decr_active(grp, m);



	/* If last member on a node, remove node from dest list */
@@ -343,7 +343,7 @@ void tipc_group_update_member(struct tipc_member *m, int len) 
	struct tipc_group *grp = m->group;

	struct tipc_member *_m, *tmp;



	if (!tipc_group_is_enabled(m))

	if (!tipc_group_is_receiver(m))

		return;



	m->window -= len;
@@ -351,16 +351,16 @@ void tipc_group_update_member(struct tipc_member *m, int len) 
	if (m->window >= ADV_IDLE)

		return;



	list_del_init(&m->congested);

	list_del_init(&m->small_win);



	/* Sort member into congested members' list */

	list_for_each_entry_safe(_m, tmp, &grp->congested, congested) {

	/* Sort member into small_window members' list */

	list_for_each_entry_safe(_m, tmp, &grp->small_win, small_win) {

		if (m->window > _m->window)

			continue;

		list_add_tail(&m->congested, &_m->congested);

		list_add_tail(&m->small_win, &_m->small_win);

		return;

	}

	list_add_tail(&m->congested, &grp->congested);

	list_add_tail(&m->small_win, &grp->small_win);

}



void tipc_group_update_bc_members(struct tipc_group *grp, int len, bool ack)
@@ -372,7 +372,7 @@ void tipc_group_update_bc_members(struct tipc_group *grp, int len, bool ack) 


	for (n = rb_first(&grp->members); n; n = rb_next(n)) {

		m = container_of(n, struct tipc_member, tree_node);

		if (tipc_group_is_enabled(m)) {

		if (tipc_group_is_receiver(m)) {

			tipc_group_update_member(m, len);

			m->bc_acked = prev;

			ackers++;
@@ -427,10 +427,10 @@ bool tipc_group_bc_cong(struct tipc_group *grp, int len) 
	if (grp->bc_ackers)

		return true;



	if (list_empty(&grp->congested))

	if (list_empty(&grp->small_win))

		return false;



	m = list_first_entry(&grp->congested, struct tipc_member, congested);

	m = list_first_entry(&grp->small_win, struct tipc_member, small_win);

	if (m->window >= len)

		return false;
@@ -485,7 +485,7 @@ void tipc_group_filter_msg(struct tipc_group *grp, struct sk_buff_head *inputq, 
		goto drop;



	m = tipc_group_find_member(grp, node, port);

	if (!tipc_group_is_receiver(m))

	if (!tipc_group_is_sender(m))

		goto drop;



	if (less(msg_grp_bc_seqno(hdr), m->bc_rcv_nxt))
@@ -691,7 +691,7 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup, 
			msg_set_grp_bc_seqno(ehdr, m->bc_syncpt);

			__skb_queue_tail(inputq, m->event_msg);

		}

		list_del_init(&m->congested);

		list_del_init(&m->small_win);

		tipc_group_update_member(m, 0);

		return;

	case GRP_LEAVE_MSG:
@@ -699,7 +699,7 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup, 
			return;

		m->bc_syncpt = msg_grp_bc_syncpt(hdr);

		list_del_init(&m->list);

		list_del_init(&m->congested);

		list_del_init(&m->small_win);

		*usr_wakeup = true;



		/* Wait until WITHDRAW event is received */
@@ -719,7 +719,7 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup, 
		m->window += msg_adv_win(hdr);

		*usr_wakeup = m->usr_pending;

		m->usr_pending = false;

		list_del_init(&m->congested);

		list_del_init(&m->small_win);

		return;

	case GRP_ACK_MSG:

		if (!m)
@@ -840,7 +840,7 @@ void tipc_group_member_evt(struct tipc_group *grp, 
		if (m->window < ADV_IDLE)

			tipc_group_update_member(m, 0);

		else

			list_del_init(&m->congested);

			list_del_init(&m->small_win);

	} else if (event == TIPC_WITHDRAWN) {

		if (!m)

			goto drop;
@@ -873,7 +873,7 @@ void tipc_group_member_evt(struct tipc_group *grp, 
			__skb_queue_tail(inputq, skb);

		}

		list_del_init(&m->list);

		list_del_init(&m->congested);

		list_del_init(&m->small_win);

	}

	*sk_rcvbuf = tipc_group_rcvbuf_limit(grp);

	return;