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authorsjur.brandeland@stericsson.com <sjur.brandeland@stericsson.com>2011-05-13 02:44:04 +0000
committerDavid S. Miller <davem@davemloft.net>2011-05-15 17:45:55 -0400
commitb3ccfbe4098a5542177d0f34e8979f32e7d606e1 (patch)
tree3f0046e3b519ea253db222abcb761af34b8a1718 /include/net/caif
parent43e3692101086add8719c3b8b50b05c9ac5b14e1 (diff)
downloadblackbird-op-linux-b3ccfbe4098a5542177d0f34e8979f32e7d606e1.tar.gz
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caif: Protected in-flight packets using dev or sock refcont.
CAIF Socket Layer and ip-interface registers reference counters in CAIF service layer. The functions sock_hold, sock_put and dev_hold, dev_put are used by CAIF Stack to protect from freeing memory while packets are in-flight. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/caif')
-rw-r--r--include/net/caif/caif_dev.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/net/caif/caif_dev.h b/include/net/caif/caif_dev.h
index 7e3f7a6d2ba3..6638435525fc 100644
--- a/include/net/caif/caif_dev.h
+++ b/include/net/caif/caif_dev.h
@@ -74,6 +74,23 @@ int caif_connect_client(struct caif_connect_request *conn_req,
int caif_disconnect_client(struct cflayer *client_layer);
/**
+ * caif_client_register_refcnt - register ref-count functions provided by client.
+ *
+ * @adapt_layer: Client layer using CAIF Stack.
+ * @hold: Function provided by client layer increasing ref-count
+ * @put: Function provided by client layer decreasing ref-count
+ *
+ * Client of the CAIF Stack must register functions for reference counting.
+ * These functions are called by the CAIF Stack for every upstream packet,
+ * and must therefore be implemented efficiently.
+ *
+ * Client should call caif_free_client when reference count degrease to zero.
+ */
+
+void caif_client_register_refcnt(struct cflayer *adapt_layer,
+ void (*hold)(struct cflayer *lyr),
+ void (*put)(struct cflayer *lyr));
+/**
* caif_connect_req_to_link_param - Translate configuration parameters
* from socket format to internal format.
* @cnfg: Pointer to configuration handler
@@ -83,8 +100,20 @@ int caif_disconnect_client(struct cflayer *client_layer);
* setting up channels.
*
*/
+
int caif_connect_req_to_link_param(struct cfcnfg *cnfg,
struct caif_connect_request *con_req,
struct cfctrl_link_param *setup_param);
+/**
+ * caif_free_client - Free memory used to manage the client in the CAIF Stack.
+ *
+ * @client_layer: Client layer to be removed.
+ *
+ * This function must be called from client layer in order to free memory.
+ * Caller must guarantee that no packets are in flight upstream when calling
+ * this function.
+ */
+void caif_free_client(struct cflayer *adap_layer);
+
#endif /* CAIF_DEV_H_ */
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