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authorYing Xue <ying.xue@windriver.com>2014-12-02 15:00:23 +0800
committerDavid S. Miller <davem@davemloft.net>2014-12-08 20:39:55 -0500
commit1b61e70ad13e1c907f143c3b0a1694df640639c0 (patch)
treef36b4e8e5a25e8c02fea68cfe5bf54d097cc788d /net/tipc/name_distr.c
parent60c04aecd8a72a84869308bdf2289a7aabb9a88c (diff)
downloadlinux-1b61e70ad13e1c907f143c3b0a1694df640639c0.tar.bz2
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>
Diffstat (limited to 'net/tipc/name_distr.c')
-rw-r--r--net/tipc/name_distr.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index 56248db75274..628cd85b647e 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -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);
+ }
}
/**