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tipc: modify struct tipc_plist to be more versatile

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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: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy 2017-01-03 10:55:10 -05:00 committed by David S. Miller
parent 8c44e1af16
commit 4d8642d896
3 changed files with 84 additions and 47 deletions
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102
net/tipc/name_table.c
View File

@ -608,7 +608,7 @@ not_found:
* 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 tipc_plist *nl;
struct u32_item {
struct list_head list;
u32 value;
};
if (likely(!pl->port)) {
pl->port = port;
return;
bool u32_find(struct list_head *l, u32 value)
{
struct u32_item *item;
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;
}
bool u32_del(struct list_head *l, u32 value)
{
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);
}
}
u32 tipc_plist_pop(struct tipc_plist *pl)
int u32_list_len(struct list_head *l)
{
struct tipc_plist *nl;
u32 port = 0;
struct u32_item *item;
int i = 0;
if (likely(list_empty(&pl->list))) {
port = pl->port;
pl->port = 0;
return port;
list_for_each_entry(item, l, list) {
i++;
}
nl = list_first_entry(&pl->list, typeof(*nl), list);
port = nl->port;
list_del(&nl->list);
kfree(nl);
return port;
return i;
}

21
net/tipc/name_table.h
View File

@ -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

8
net/tipc/socket.c
View File

@ -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);