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Date: Fri, 13 May 2011 14:44:03 +0200
From: Sjur Brændeland <sjur.brandeland@...ricsson.com>
To: "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc: Sjur Brændeland <sjur.brandeland@...ricsson.com>
Subject: [net-next-2.6 05/10] caif: Move refcount from service layer to sock and dev.
Instead of having reference counts in caif service layers,
we hook into existing refcount handling in socket layer and netdevice.
Signed-off-by: Sjur Brændeland <sjur.brandeland@...ricsson.com>
---
include/net/caif/cfsrvl.h | 29 ++++++++++++++++-------------
net/caif/cfrfml.c | 4 ++--
net/caif/cfsrvl.c | 35 +++++++++++++++++++++++++++++------
3 files changed, 47 insertions(+), 21 deletions(-)
diff --git a/include/net/caif/cfsrvl.h b/include/net/caif/cfsrvl.h
index 6c8279c..0f59052 100644
--- a/include/net/caif/cfsrvl.h
+++ b/include/net/caif/cfsrvl.h
@@ -10,6 +10,7 @@
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/kref.h>
+#include <linux/rculist.h>
struct cfsrvl {
struct cflayer layer;
@@ -17,9 +18,11 @@ struct cfsrvl {
bool phy_flow_on;
bool modem_flow_on;
bool supports_flowctrl;
- void (*release)(struct kref *);
+ void (*release)(struct cflayer *layer);
struct dev_info dev_info;
- struct kref ref;
+ void (*hold)(struct cflayer *lyr);
+ void (*put)(struct cflayer *lyr);
+ struct rcu_head rcu;
};
struct cflayer *cfvei_create(u8 linkid, struct dev_info *dev_info);
@@ -29,6 +32,10 @@ struct cflayer *cfvidl_create(u8 linkid, struct dev_info *dev_info);
struct cflayer *cfrfml_create(u8 linkid, struct dev_info *dev_info,
int mtu_size);
struct cflayer *cfdbgl_create(u8 linkid, struct dev_info *dev_info);
+
+void cfsrvl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid);
+
bool cfsrvl_phyid_match(struct cflayer *layer, int phyid);
void cfsrvl_init(struct cfsrvl *service,
@@ -40,23 +47,19 @@ u8 cfsrvl_getphyid(struct cflayer *layer);
static inline void cfsrvl_get(struct cflayer *layr)
{
- struct cfsrvl *s;
- if (layr == NULL)
+ struct cfsrvl *s = container_of(layr, struct cfsrvl, layer);
+ if (layr == NULL || layr->up == NULL || s->hold == NULL)
return;
- s = container_of(layr, struct cfsrvl, layer);
- kref_get(&s->ref);
+
+ s->hold(layr->up);
}
static inline void cfsrvl_put(struct cflayer *layr)
{
- struct cfsrvl *s;
- if (layr == NULL)
+ struct cfsrvl *s = container_of(layr, struct cfsrvl, layer);
+ if (layr == NULL || layr->up == NULL || s->hold == NULL)
return;
- s = container_of(layr, struct cfsrvl, layer);
- WARN_ON(!s->release);
- if (s->release)
- kref_put(&s->ref, s->release);
+ s->put(layr->up);
}
-
#endif /* CFSRVL_H_ */
diff --git a/net/caif/cfrfml.c b/net/caif/cfrfml.c
index e2fb5fa..0deabb4 100644
--- a/net/caif/cfrfml.c
+++ b/net/caif/cfrfml.c
@@ -31,9 +31,9 @@ struct cfrfml {
spinlock_t sync;
};
-static void cfrfml_release(struct kref *kref)
+static void cfrfml_release(struct cflayer *layer)
{
- struct cfsrvl *srvl = container_of(kref, struct cfsrvl, ref);
+ struct cfsrvl *srvl = container_of(layer, struct cfsrvl, layer);
struct cfrfml *rfml = container_obj(&srvl->layer);
if (rfml->incomplete_frm)
diff --git a/net/caif/cfsrvl.c b/net/caif/cfsrvl.c
index 24ba392..535a1e7 100644
--- a/net/caif/cfsrvl.c
+++ b/net/caif/cfsrvl.c
@@ -10,6 +10,7 @@
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/slab.h>
+#include <linux/module.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfsrvl.h>
#include <net/caif/cfpkt.h>
@@ -27,8 +28,8 @@ static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
{
struct cfsrvl *service = container_obj(layr);
- caif_assert(layr->up != NULL);
- caif_assert(layr->up->ctrlcmd != NULL);
+ if (layr->up == NULL || layr->up->ctrlcmd == NULL)
+ return;
switch (ctrl) {
case CAIF_CTRLCMD_INIT_RSP:
@@ -151,9 +152,9 @@ static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl)
return -EINVAL;
}
-static void cfsrvl_release(struct kref *kref)
+static void cfsrvl_release(struct cflayer *layer)
{
- struct cfsrvl *service = container_of(kref, struct cfsrvl, ref);
+ struct cfsrvl *service = container_of(layer, struct cfsrvl, layer);
kfree(service);
}
@@ -173,10 +174,8 @@ void cfsrvl_init(struct cfsrvl *service,
service->dev_info = *dev_info;
service->supports_flowctrl = supports_flowctrl;
service->release = cfsrvl_release;
- kref_init(&service->ref);
}
-
bool cfsrvl_ready(struct cfsrvl *service, int *err)
{
if (service->open && service->modem_flow_on && service->phy_flow_on)
@@ -189,6 +188,7 @@ bool cfsrvl_ready(struct cfsrvl *service, int *err)
*err = -EAGAIN;
return false;
}
+
u8 cfsrvl_getphyid(struct cflayer *layer)
{
struct cfsrvl *servl = container_obj(layer);
@@ -200,3 +200,26 @@ bool cfsrvl_phyid_match(struct cflayer *layer, int phyid)
struct cfsrvl *servl = container_obj(layer);
return servl->dev_info.id == phyid;
}
+
+void caif_free_client(struct cflayer *adap_layer)
+{
+ struct cfsrvl *servl;
+ if (adap_layer == NULL || adap_layer->dn == NULL)
+ return;
+ servl = container_obj(adap_layer->dn);
+ servl->release(&servl->layer);
+}
+EXPORT_SYMBOL(caif_free_client);
+
+void caif_client_register_refcnt(struct cflayer *adapt_layer,
+ void (*hold)(struct cflayer *lyr),
+ void (*put)(struct cflayer *lyr))
+{
+ struct cfsrvl *service;
+ service = container_of(adapt_layer->dn, struct cfsrvl, layer);
+
+ WARN_ON(adapt_layer == NULL || adapt_layer->dn == NULL);
+ service->hold = hold;
+ service->put = put;
+}
+EXPORT_SYMBOL(caif_client_register_refcnt);
--
1.7.1
--
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