From 5b2086567503f9b55136642031ec0067319f58e0 Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Wed, 28 Apr 2010 08:54:36 +0000 Subject: caif: Add reference counting to service layer 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 Signed-off-by: David S. Miller --- include/net/caif/caif_dev.h | 11 +++++++++++ include/net/caif/cfcnfg.h | 7 +++++++ include/net/caif/cfsrvl.h | 22 ++++++++++++++++++++++ 3 files changed, 40 insertions(+) (limited to 'include/net/caif') diff --git a/include/net/caif/caif_dev.h b/include/net/caif/caif_dev.h index 3aa1ff6..318ab94 100644 --- a/include/net/caif/caif_dev.h +++ b/include/net/caif/caif_dev.h @@ -70,6 +70,17 @@ int caif_connect_client(struct caif_connect_request *config, int caif_disconnect_client(struct cflayer *client_layer); /** + * caif_release_client - Release adaptation layer reference to client. + * + * @client_layer: Client layer. + * + * Releases a client/adaptation layer use of the caif stack. + * This function must be used after caif_disconnect_client to + * decrease the reference count of the service layer. + */ +void caif_release_client(struct cflayer *client_layer); + +/** * connect_req_to_link_param - Translate configuration parameters * from socket format to internal format. * @cnfg: Pointer to configuration handler diff --git a/include/net/caif/cfcnfg.h b/include/net/caif/cfcnfg.h index f16b875..9fc2fc2 100644 --- a/include/net/caif/cfcnfg.h +++ b/include/net/caif/cfcnfg.h @@ -97,6 +97,13 @@ int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer); /** + * cfcnfg_release_adap_layer - Used by client to release the adaptation layer. + * + * @adap_layer: Adaptation layer. + */ +void cfcnfg_release_adap_layer(struct cflayer *adap_layer); + +/** * cfcnfg_add_adaptation_layer - Add an adaptation layer to the CAIF stack. * * The adaptation Layer is where the interface to application or higher-level diff --git a/include/net/caif/cfsrvl.h b/include/net/caif/cfsrvl.h index b2a12db..2dc9eb1 100644 --- a/include/net/caif/cfsrvl.h +++ b/include/net/caif/cfsrvl.h @@ -9,14 +9,18 @@ #include #include #include +#include + struct cfsrvl { struct cflayer layer; bool open; bool phy_flow_on; bool modem_flow_on; struct dev_info dev_info; + struct kref ref; }; +void cfsrvl_release(struct kref *kref); struct cflayer *cfvei_create(u8 linkid, struct dev_info *dev_info); struct cflayer *cfdgml_create(u8 linkid, struct dev_info *dev_info); struct cflayer *cfutill_create(u8 linkid, struct dev_info *dev_info); @@ -31,4 +35,22 @@ void cfsrvl_init(struct cfsrvl *service, bool cfsrvl_ready(struct cfsrvl *service, int *err); u8 cfsrvl_getphyid(struct cflayer *layer); +static inline void cfsrvl_get(struct cflayer *layr) +{ + struct cfsrvl *s; + if (layr == NULL) + return; + s = container_of(layr, struct cfsrvl, layer); + kref_get(&s->ref); +} + +static inline void cfsrvl_put(struct cflayer *layr) +{ + struct cfsrvl *s; + if (layr == NULL) + return; + s = container_of(layr, struct cfsrvl, layer); + kref_put(&s->ref, cfsrvl_release); +} + #endif /* CFSRVL_H_ */ -- cgit v1.1