sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Improvements in IEEE 802.15.4 connections allocation.

Browse Source
This commit is contained in:
Fotis Panagiotopoulos 2023-02-13 12:21:46 +02:00 committed by Xiang Xiao
parent c5cc70a8b1
commit 22a82b3f51
2 changed files with 72 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
net/ieee802154/Kconfig
View File

@ -33,9 +33,46 @@ config NET_IEEE802154_FRAMELEN
This setting is currently used only for detection data transfers
that would exceed the radio frame length.
config NET_IEEE802154_NCONNS
int "Max IEEE 802.15.4 sockets"
config NET_IEEE802154_PREALLOC_CONNS
int "Preallocated IEEE 802.15.4 sockets"
default 4
---help---
Number of IEEE 802.15.4 connections (all tasks).
This number of connections will be pre-allocated during system boot.
If dynamic connections allocation is enabled, more connections may
be allocated at a later time, as the system needs them. Else this
will be the maximum number of connections available to the system
at all times.
Set to 0 to disable (and rely only on dynamic allocations).
config NET_IEEE802154_ALLOC_CONNS
int "Dynamic IEEE 802.15.4 connections allocation"
default 0
---help---
Dynamic memory allocations for IEEE 802.15.4.
When set to 0 all dynamic allocations are disabled.
When set to 1 a new connection will be allocated every time,
and it will be free'd when no longer needed.
Setting this to 2 or more will allocate the connections in
batches (with batch size equal to this config). When a
connection is no longer needed, it will be returned to the
free connections pool, and it will never be deallocated!
config NET_IEEE802154_MAX_CONNS
int "Maximum number of IEEE 802.15.4 connections"
default 0
depends on NET_IEEE802154_ALLOC_CONNS > 0
---help---
If dynamic connections allocation is selected (NET_IEEE802154_ALLOC_CONNS > 0)
this will limit the number of connections that can be allocated.
This is useful in case the system is under very heavy load (or
under attack), ensuring that the heap will not be exhausted.
config NET_IEEE802154_NCONTAINERS
int "Number of pre-allocated frame containers"

43
net/ieee802154/ieee802154_conn.c
View File

@ -51,9 +51,9 @@
* network lock.
*/
#ifndef CONFIG_NET_ALLOC_CONNS
#if CONFIG_NET_IEEE802154_PREALLOC_CONNS > 0
static struct ieee802154_conn_s
g_ieee802154_connections[CONFIG_NET_IEEE802154_NCONNS];
g_ieee802154_connections[CONFIG_NET_IEEE802154_PREALLOC_CONNS];
#endif
/* A list of all free packet socket connections */
@ -82,10 +82,10 @@ static dq_queue_t g_active_ieee802154_connections;
void ieee802154_conn_initialize(void)
{
#ifndef CONFIG_NET_ALLOC_CONNS
#if CONFIG_NET_IEEE802154_PREALLOC_CONNS > 0
int i;
for (i = 0; i < CONFIG_NET_IEEE802154_NCONNS; i++)
for (i = 0; i < CONFIG_NET_IEEE802154_PREALLOC_CONNS; i++)
{
/* Link each pre-allocated connection structure into the free list. */
@ -107,20 +107,30 @@ void ieee802154_conn_initialize(void)
FAR struct ieee802154_conn_s *ieee802154_conn_alloc(void)
{
FAR struct ieee802154_conn_s *conn;
#ifdef CONFIG_NET_ALLOC_CONNS
#if CONFIG_NET_IEEE802154_ALLOC_CONNS > 0
int i;
#endif
/* The free list is protected by the network lock. */
net_lock();
#ifdef CONFIG_NET_ALLOC_CONNS
#if CONFIG_NET_IEEE802154_ALLOC_CONNS > 0
if (dq_peek(&g_free_ieee802154_connections) == NULL)
{
conn = kmm_zalloc(sizeof(*conn) * CONFIG_NET_IEEE802154_NCONNS);
#if CONFIG_NET_IEEE802154_MAX_CONNS > 0
if (dq_count(&g_active_ieee802154_connections) +
CONFIG_NET_IEEE802154_ALLOC_CONNS
>= CONFIG_NET_IEEE802154_MAX_CONNS)
{
net_unlock();
return NULL;
}
#endif
conn = kmm_zalloc(sizeof(*conn) * CONFIG_NET_IEEE802154_ALLOC_CONNS);
if (conn != NULL)
{
for (i = 0; i < CONFIG_NET_IEEE802154_NCONNS; i++)
for (i = 0; i < CONFIG_NET_IEEE802154_ALLOC_CONNS; i++)
{
dq_addlast(&conn[i].sconn.node,
&g_free_ieee802154_connections);
@ -188,9 +198,22 @@ void ieee802154_conn_free(FAR struct ieee802154_conn_s *conn)
memset(conn, 0, sizeof(*conn));
/* Free the connection */
/* If this is a preallocated or a batch allocated connection store it in
* the free connections list. Else free it.
*/
#if CONFIG_NET_IEEE802154_ALLOC_CONNS == 1
if (conn < g_ieee802154_connections || conn >= (g_ieee802154_connections +
CONFIG_NET_IEEE802154_PREALLOC_CONNS))
{
kmm_free(conn);
}
else
#endif
{
dq_addlast(&conn->sconn.node, &g_free_ieee802154_connections);
}
dq_addlast(&conn->sconn.node, &g_free_ieee802154_connections);
net_unlock();
}