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tipc: remove size variable from publ_list struct 

The size variable is introduced in publ_list struct to help us exactly
calculate SKB buffer sizes needed by publications when all publications
in name table are delivered in bulk in named_distribute(). But if
publication SKB buffer size is assumed to MTU, the size variable in
publ_list struct can be completely eliminated at the cost of wasting
a bit memory space for last SKB.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Tero Aho <tero.aho@coriant.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2014-12-02 15:00:23 +08:00 committed by David S. Miller
parent 60c04aecd8
commit 1b61e70ad1
1 changed files with 7 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
net/tipc/name_distr.c
View File

@ -41,26 +41,21 @@
/**
* struct publ_list - list of publications made by this node
* @list: circular list of publications
* @list_size: number of entries in list
*/
struct publ_list {
struct list_head list;
u32 size;
};
static struct publ_list publ_zone = {
.list = LIST_HEAD_INIT(publ_zone.list),
.size = 0,
};
static struct publ_list publ_cluster = {
.list = LIST_HEAD_INIT(publ_cluster.list),
.size = 0,
};
static struct publ_list publ_node = {
.list = LIST_HEAD_INIT(publ_node.list),
.size = 0,
};
static struct publ_list *publ_lists[] = {
@ -147,7 +142,6 @@ struct sk_buff *tipc_named_publish(struct publication *publ)
struct distr_item *item;
list_add_tail(&publ->local_list, &publ_lists[publ->scope]->list);
publ_lists[publ->scope]->size++;
if (publ->scope == TIPC_NODE_SCOPE)
return NULL;
@ -172,7 +166,6 @@ struct sk_buff *tipc_named_withdraw(struct publication *publ)
struct distr_item *item;
list_del(&publ->local_list);
publ_lists[publ->scope]->size--;
if (publ->scope == TIPC_NODE_SCOPE)
return NULL;
@ -200,16 +193,12 @@ static void named_distribute(struct sk_buff_head *list, u32 dnode,
struct publication *publ;
struct sk_buff *skb = NULL;
struct distr_item *item = NULL;
uint dsz = pls->size * ITEM_SIZE;
uint msg_dsz = (tipc_node_get_mtu(dnode, 0) / ITEM_SIZE) * ITEM_SIZE;
uint rem = dsz;
uint msg_rem = 0;
uint msg_rem = msg_dsz;
list_for_each_entry(publ, &pls->list, local_list) {
/* Prepare next buffer: */
if (!skb) {
msg_rem = min_t(uint, rem, msg_dsz);
rem -= msg_rem;
skb = named_prepare_buf(PUBLICATION, msg_rem, dnode);
if (!skb) {
pr_warn("Bulk publication failure\n");
@ -227,8 +216,14 @@ static void named_distribute(struct sk_buff_head *list, u32 dnode,
if (!msg_rem) {
__skb_queue_tail(list, skb);
skb = NULL;
msg_rem = msg_dsz;
}
}
if (skb) {
msg_set_size(buf_msg(skb), INT_H_SIZE + (msg_dsz - msg_rem));
skb_trim(skb, INT_H_SIZE + (msg_dsz - msg_rem));
__skb_queue_tail(list, skb);
}
}
/**