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caif: Add reference counting to service layer

Browse source 
Changes:
o Added functions cfsrvl_get and cfsrvl_put.
o Added support release_client to use by socket and net device.
o Increase reference counting for in-flight packets from cfmuxl

Signed-off-by: Sjur Braendeland <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Sjur Braendeland 2010-04-28 08:54:36 +00:00 • committed by David S. Miller
commit 5b20865675
7 changed files with 66 additions and 1 deletions
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6
net/caif/caif_dev.c
View file

@ -346,6 +346,12 @@ int caif_disconnect_client(struct cflayer *adap_layer)
}
EXPORT_SYMBOL(caif_disconnect_client);
void caif_release_client(struct cflayer *adap_layer)
{
cfcnfg_release_adap_layer(adap_layer);
}
EXPORT_SYMBOL(caif_release_client);
/* Per-namespace Caif devices handling */
static int caif_init_net(struct net *net)
{

7
net/caif/cfcnfg.c
View file

@ -247,6 +247,13 @@ end:
}
EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer);
void cfcnfg_release_adap_layer(struct cflayer *adap_layer)
{
if (adap_layer->dn)
cfsrvl_put(adap_layer->dn);
}
EXPORT_SYMBOL(cfcnfg_release_adap_layer);
static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id,
struct cflayer *client_layer)
{

7
net/caif/cfmuxl.c
View file

@ -62,6 +62,7 @@ int cfmuxl_set_uplayer(struct cflayer *layr, struct cflayer *up, u8 linkid)
{
struct cfmuxl *muxl = container_obj(layr);
spin_lock(&muxl->receive_lock);
cfsrvl_get(up);
list_add(&up->node, &muxl->srvl_list);
spin_unlock(&muxl->receive_lock);
return 0;
@ -172,8 +173,11 @@ struct cflayer *cfmuxl_remove_uplayer(struct cflayer *layr, u8 id)
struct cfmuxl *muxl = container_obj(layr);
spin_lock(&muxl->receive_lock);
up = get_up(muxl, id);
if (up == NULL)
return NULL;
memset(muxl->up_cache, 0, sizeof(muxl->up_cache));
list_del(&up->node);
cfsrvl_put(up);
spin_unlock(&muxl->receive_lock);
return up;
}
@ -203,8 +207,9 @@ static int cfmuxl_receive(struct cflayer *layr, struct cfpkt *pkt)
*/
return /* CFGLU_EPROT; */ 0;
}
cfsrvl_get(up);
ret = up->receive(up, pkt);
cfsrvl_put(up);
return ret;
}

7
net/caif/cfsrvl.c
View file

@ -158,6 +158,13 @@ void cfsrvl_init(struct cfsrvl *service,
service->layer.ctrlcmd = cfservl_ctrlcmd;
service->layer.modemcmd = cfservl_modemcmd;
service->dev_info = *dev_info;
kref_init(&service->ref);
}
void cfsrvl_release(struct kref *kref)
{
struct cfsrvl *service = container_of(kref, struct cfsrvl, ref);
kfree(service);
}
bool cfsrvl_ready(struct cfsrvl *service, int *err)