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Date: Mon, 30 Nov 2009 16:00:49 +0100
From: sjur.brandeland@...ricsson.com
To: netdev@...r.kernel.org, stefano.babic@...ic.homelinux.org
Cc: randy.dunlap@...cle.com, kim.xx.lilliestierna@...ricsson.com,
christian.bejram@...ricsson.com, daniel.martensson@...ricsson.com,
Sjur Braendeland <sjur.brandeland@...ricsson.com>
Subject: [RFC PATCH v3 5/8] CAIF Protocol Stack
From: Sjur Braendeland <sjur.brandeland@...ricsson.com>
Signed-off-by: Sjur Braendeland <sjur.brandeland@...ricsson.com>
---
net/caif/Kconfig | 51 ++
net/caif/Makefile | 51 ++
net/caif/caif_chnlif.c | 205 ++++++
net/caif/caif_config_util.c | 163 +++++
net/caif/caif_dev.c | 520 ++++++++++++++
net/caif/caif_socket.c | 1560 +++++++++++++++++++++++++++++++++++++++++++
net/caif/chnl_net.c | 655 ++++++++++++++++++
7 files changed, 3205 insertions(+), 0 deletions(-)
create mode 100644 net/caif/Kconfig
create mode 100644 net/caif/Makefile
create mode 100644 net/caif/caif_chnlif.c
create mode 100644 net/caif/caif_config_util.c
create mode 100644 net/caif/caif_dev.c
create mode 100644 net/caif/caif_socket.c
create mode 100644 net/caif/chnl_net.c
diff --git a/net/caif/Kconfig b/net/caif/Kconfig
new file mode 100644
index 0000000..9349123
--- /dev/null
+++ b/net/caif/Kconfig
@@ -0,0 +1,51 @@
+#
+# CAIF net configurations
+#
+
+#menu "CAIF Support"
+comment "CAIF Support"
+
+menuconfig CAIF
+ tristate "Enable CAIF support"
+ default n
+ ---help---
+ Say Y here if you need to use a phone modem that uses CAIF as transport.
+ You will also need to say yes to any CAIF physical devices that your platform
+ supports.
+ This can be either built-in or a loadable module; if you select to build it as module
+ then the rest of CAIF also needs to built as modules.
+ See Documentation/CAIF for a further explanation on how to use and configure.
+
+if CAIF
+
+config CAIF_NETDEV
+ tristate "CAIF Network device"
+ default CAIF
+ ---help---
+ Say Y if you will be using the CAIF based network device.
+ This can be either built-in or a loadable module.
+ If you select to build it as a built-in then the main CAIF device must also be a built-in.
+ If unsure say Y.
+
+config CAIF_SOCK
+ tristate "CAIF Sockets"
+ default CAIF
+ ---help---
+ Say Y if you will be using the CAIF Sockets.
+ This can be either built-in or a loadable module.
+ If you select to build it as a built-in then the main CAIF device mist also be a built-in.
+ If unsure say Y.
+
+config CAIF_DEBUG
+ bool "Enable Debug"
+ default n
+ --- help ---
+ Enable the inclusion of debug code in the CAIF stack.
+ Be aware that doing this will impact performance.
+ If unsure say N.
+
+
+# Include physical drivers
+source "drivers/net/caif/Kconfig"
+endif
+#endmenu
diff --git a/net/caif/Makefile b/net/caif/Makefile
new file mode 100644
index 0000000..2b87906
--- /dev/null
+++ b/net/caif/Makefile
@@ -0,0 +1,51 @@
+ifeq ($(CONFIG_CAIF_USE_PLAIN),1)
+CFPKT:=plain
+else
+CFPKT:=skbuff
+CAIF_FLAGS+=-DCAIF_USE_SKB
+endif
+
+ifeq ($(CONFIG_CAIF_DEBUG),1)
+CAIF_FLAGS+=-DCAIF_DEBUG_ON
+endif
+ccflags-y := $(CAIF_FLAGS)
+
+caif-objs := caif_dev.o caif_chnlif.o \
+ generic/cfcnfg.o generic/cfmuxl.o generic/cfctrl.o \
+ generic/cffrml.o generic/cfveil.o generic/cflist.o \
+ generic/fcs.o generic/cfserl.o generic/cfdgml.o \
+ generic/cfspil.o generic/cfrfml.o generic/cfvidl.o \
+ generic/cfmsll.o generic/cfusbl.o generic/cfutill.o \
+ generic/cfloopcfg.o generic/cflooplayer.o generic/cfsrvl.o \
+ generic/cfshml.o generic/cfpkt_$(CFPKT).o caif_config_util.o
+
+clean-dirs:= .tmp_versions
+
+clean-files:= Module.symvers modules.order *.cmd *~ \
+ generic/loopback/Module.symvers \
+ generic/loopback/modules.order \
+ generic/loopback/*.cmd \
+ generic/loopback/*.o \
+ generic/loopback/*~ \
+ generic/Module.symvers \
+ generic/modules.order \
+ generic/*.cmd \
+ generic/*.o \
+ generic/*~
+
+# Main CAIF module
+obj-$(CONFIG_CAIF) += caif.o
+
+# CAIF net device
+obj-$(CONFIG_CAIF_NETDEV) += chnl_net.o
+
+obj-$(CONFIG_CAIF_SOCK) += caif_socket.o
+
+export-objs := caif.o
+
+clean:
+ ${MAKE} -C generic clean
+ rm generic/modules.order generic/Module.symvers \
+ generic/*.cmd generic/*~ \
+ generic/modules.order generic/Module.symvers \
+ generic/*.o generic/loopback/*.o
diff --git a/net/caif/caif_chnlif.c b/net/caif/caif_chnlif.c
new file mode 100644
index 0000000..9c8a656
--- /dev/null
+++ b/net/caif/caif_chnlif.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2009
+ * Author: Daniel Martensson / Daniel.Martensson@...ricsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/skbuff.h>
+#include <net/caif/caif_kernel.h>
+#include <net/caif/generic/caif_layer.h>
+#include <net/caif/caif_config_util.h>
+#include <net/caif/caif_log.h>
+#include <net/caif/generic/cfpkt.h>
+#include <net/caif/generic/cfcnfg.h>
+#include <net/caif/generic/cfglue.h>
+#include <net/caif/caif_chr.h>
+struct caif_kernelif {
+ struct layer layer;
+ struct caif_device *dev;
+ struct cfctrl_link_param param;
+};
+
+
+/**
+ * func caif_create_skb - Creates a CAIF SKB buffer
+ * @data: data to add to buffer
+ * @data_length: length of data
+ */
+struct sk_buff *caif_create_skb(unsigned char *data, unsigned int data_length)
+{
+ /* NOTE: Make room for CAIF headers when using SKB inside CAIF. */
+ struct sk_buff *skb =
+ alloc_skb(data_length + CAIF_SKB_HEAD_RESERVE +
+ CAIF_SKB_TAIL_RESERVE, GFP_ATOMIC);
+ if (skb == NULL)
+ return NULL;
+ skb_reserve(skb, CAIF_SKB_HEAD_RESERVE);
+
+ memcpy(skb_put(skb, data_length), data, data_length);
+ return skb;
+}
+EXPORT_SYMBOL(caif_create_skb);
+
+int caif_extract_and_destroy_skb(struct sk_buff *skb, unsigned char *data,
+ unsigned int max_length)
+{
+ unsigned int len;
+ len = skb->len;
+ /* What should actually be done here ?
+ * skb_linearize only fails on an out of memory condition
+ * if we fail here we are NOT freeing the skb
+ */
+ if (!skb_linearize(skb) || skb->len > max_length)
+ return CFGLU_EOVERFLOW;
+ memcpy(data, skb->data, skb->len);
+ kfree_skb(skb);
+ return len;
+}
+EXPORT_SYMBOL(caif_extract_and_destroy_skb);
+
+/* NOTE: transmit takes ownership of the SKB.
+ * I.e. transmit only fails on severe errors.
+ * flow_off is not checked on transmit; this is client's responcibility.
+ */
+int caif_transmit(struct caif_device *dev, struct sk_buff *skb)
+{
+ struct caif_kernelif *chnlif =
+ (struct caif_kernelif *) dev->_caif_handle;
+ struct cfpkt *pkt;
+#ifdef CAIF_USE_SKB
+ pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
+#else
+ pkt = cfpkt_create(skb->len);
+ cfpkt_add_body(pkt, skb->data, skb->len);
+ kfree_skb(skb);
+#endif
+ CAIFLOG_TRACE2("Transmit (%p)", chnlif->layer.dn);
+ return chnlif->layer.dn->transmit(chnlif->layer.dn, NULL, pkt);
+}
+EXPORT_SYMBOL(caif_transmit);
+
+int caif_flow_control(struct caif_device *dev, enum caif_flowctrl flow)
+{
+ enum caif_modemcmd modemcmd;
+ struct caif_kernelif *chnlif =
+ (struct caif_kernelif *) dev->_caif_handle;
+ switch (flow) {
+ case CAIF_FLOWCTRL_ON:
+ modemcmd = CAIF_MODEMCMD_FLOW_ON_REQ;
+ break;
+ case CAIF_FLOWCTRL_OFF:
+ modemcmd = CAIF_MODEMCMD_FLOW_OFF_REQ;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return chnlif->layer.dn->modemcmd(chnlif->layer.dn, modemcmd);
+}
+EXPORT_SYMBOL(caif_flow_control);
+
+static int chnlif_receive(struct layer *layr, struct cfpkt *cfpkt)
+{
+ /* FIXME: Use container of */
+ struct caif_kernelif *chnl = (struct caif_kernelif *) layr;
+
+ struct sk_buff *skb;
+#ifndef CAIF_USE_SKB
+ unsigned int pktlen = cfpkt_getlen(cfpkt);
+ unsigned int actual_len;
+ skb = alloc_skb(pktlen, GFP_ATOMIC);
+ if (skb == NULL)
+ return CFGLU_ENOMEM;
+
+ /* Extract data from the caif packet and copy it to the skb. */
+ cfpkt_extract(cfpkt, skb_put(skb, pktlen), pktlen, &actual_len);
+ caif_assert(pktlen == actual_len);
+ cfpkt_destroy(cfpkt);
+#else
+ skb = (struct sk_buff *) cfpkt_tonative(cfpkt);
+#endif
+ chnl->dev->receive_cb(chnl->dev, skb);
+ return CFGLU_EOK;
+}
+
+static void chnlif_flowctrl(struct layer *layr, enum caif_ctrlcmd ctrl,
+ int phyid)
+{
+ struct caif_kernelif *chnl = (struct caif_kernelif *) layr;
+ enum caif_control ctl;
+
+ CAIFLOG_TRACE("Flow Control received %d\n", ctrl);
+
+ switch (ctrl) {
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+ ctl = CAIF_CONTROL_FLOW_OFF;
+ break;
+ case CAIF_CTRLCMD_FLOW_ON_IND:
+ ctl = CAIF_CONTROL_FLOW_ON;
+ break;
+ case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
+ ctl = CAIF_CONTROL_REMOTE_SHUTDOWN;
+ break;
+ case CAIF_CTRLCMD_DEINIT_RSP:
+ ctl = CAIF_CONTROL_DEV_DEINIT;
+ chnl->dev->_caif_handle = NULL;
+ chnl->dev->control_cb(chnl->dev, ctl);
+ memset(chnl, 0, sizeof(chnl));
+ cfglu_free(chnl);
+ return;
+
+ case CAIF_CTRLCMD_INIT_RSP:
+ ctl = CAIF_CONTROL_DEV_INIT;
+ break;
+ case CAIF_CTRLCMD_INIT_FAIL_RSP:
+ ctl = CAIF_CONTROL_DEV_INIT_FAILED;
+ break;
+ default:
+ return;
+ }
+ chnl->dev->control_cb(chnl->dev, ctl);
+}
+
+int caif_add_device(struct caif_device *dev)
+{
+ int ret;
+ struct caif_kernelif *chnl = cfglu_alloc(sizeof(struct caif_kernelif));
+ chnl->dev = dev;
+ chnl->layer.ctrlcmd = chnlif_flowctrl;
+ chnl->layer.receive = chnlif_receive;
+ ret =
+ channel_config_2_link_param(get_caif_conf(), &dev->caif_config,
+ &chnl->param);
+
+
+ if (ret < 0) {
+ CAIFLOG_WARN("Bad Channel Configuration\n");
+ ret = CFGLU_EBADPARAM;
+ goto error;
+ }
+
+ if (!cfcnfg_add_adaptation_layer(get_caif_conf(), &chnl->param,
+ &chnl->layer)) {
+ ret = CFGLU_ENOTCONN;
+ goto error;
+ }
+
+ dev->_caif_handle = chnl;
+
+ return CFGLU_EOK;
+error:
+ chnl->dev->_caif_handle = NULL;
+ memset(chnl, 0, sizeof(chnl));
+ cfglu_free(chnl);
+ return ret;
+}
+EXPORT_SYMBOL(caif_add_device);
+
+int caif_remove_device(struct caif_device *caif_dev)
+{
+
+ struct caif_kernelif *chnl =
+ container_of(caif_dev->_caif_handle, struct caif_kernelif, layer);
+ bool ok = cfcnfg_del_adapt_layer(get_caif_conf(), &chnl->layer);
+ return ok ? CFGLU_EOK : CFGLU_EIO;
+}
+EXPORT_SYMBOL(caif_remove_device);
diff --git a/net/caif/caif_config_util.c b/net/caif/caif_config_util.c
new file mode 100644
index 0000000..8311a7f
--- /dev/null
+++ b/net/caif/caif_config_util.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2009
+ * Author: Daniel Martensson / Daniel.Martensson@...ricsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <net/caif/generic/cfglue.h>
+#include <net/caif/generic/cfctrl.h>
+#include <net/caif/generic/cfcnfg.h>
+#include <net/caif/caif_config_util.h>
+#include <linux/caif/caif_config.h>
+#include <linux/caif/caif_ioctl.h>
+#include <net/caif/caif_actions.h>
+
+int
+channel_config_2_link_param(struct cfcnfg *cnfg,
+ struct caif_channel_config *s, struct cfctrl_link_param *l)
+{
+
+ enum cfcnfg_phy_preference pref;
+
+ memset(l, 0, sizeof(*l));
+
+ l->priority = s->priority;
+
+ if (s->phy_name[0] != '\0') {
+ l->phyid = cfcnfg_get_named(cnfg, s->phy_name);
+ CFLOG_TRACE(("PHYNAME: '%s' -> id:%d\n", s->phy_name,
+ l->phyid));
+
+ } else {
+ switch (s->phy_pref) {
+ case CAIF_PHYPREF_UNSPECIFIED:
+ pref = CFPHYPREF_UNSPECIFIED;
+ break;
+ case CAIF_PHYPREF_LOW_LAT:
+ pref = CFPHYPREF_LOW_LAT;
+ break;
+ case CAIF_PHYPREF_HIGH_BW:
+ pref = CFPHYPREF_HIGH_BW;
+ break;
+ case _CAIF_PHYPREF_LOOP:
+ pref = CFPHYPREF_LOOP;
+ break;
+ default:
+ CFLOG_TRACE(("PHYPREF: "
+ "No Preferered Device Specified '%d'\n",
+ s->phy_pref));
+ return -CFGLU_ENODEV;
+ }
+ l->phyid = cfcnfg_get_phyid(cnfg, pref);
+ CFLOG_TRACE(("PHYPREF: '%d' -> id:%d\n", pref, l->phyid));
+ }
+
+ switch (s->type) {
+ case CAIF_CHTY_AT:
+ l->linktype = CFCTRL_SRV_VEI;
+ l->chtype = 0x02;
+ l->endpoint = 0x00;
+ CFLOG_TRACE(("CHTY: AT\n"));
+ break;
+
+ case CAIF_CHTY_AT_CTRL:
+ CFLOG_TRACE(("CHTY: AT_CTRL\n"));
+ l->linktype = CFCTRL_SRV_VEI;
+ l->chtype = 0x00;
+ l->endpoint = 0x00;
+ break;
+
+ case CAIF_CHTY_AT_PAIRED:
+ CFLOG_TRACE(("CHTY: AT_PAIRED\n"));
+ l->linktype = CFCTRL_SRV_VEI;
+ l->chtype = 0x03;
+ l->endpoint = 0x00;
+ break;
+
+ case CAIF_CHTY_VIDEO:
+ CFLOG_TRACE(("CHTY: VIDEO\n"));
+ l->linktype = CFCTRL_SRV_VIDEO;
+ l->chtype = 0x00;
+ l->endpoint = 0x00;
+ l->u.video.connid = s->u.dgm.connection_id;
+ break;
+
+ case CAIF_CHTY_DATAGRAM:
+ CFLOG_TRACE(("CHTY: DATAGRAM\n"));
+ l->linktype = CFCTRL_SRV_DATAGRAM;
+ l->chtype = 0x00;
+ l->u.datagram.connid = s->u.dgm.connection_id;
+ break;
+
+ case CAIF_CHTY_DATAGRAM_LOOP:
+ CFLOG_TRACE(("CHTY: DATAGRAM\n"));
+ l->linktype = CFCTRL_SRV_DATAGRAM;
+ l->chtype = 0x03;
+ l->endpoint = 0x00;
+ l->u.datagram.connid = s->u.dgm.connection_id;
+ break;
+
+ case CAIF_CHTY_DEBUG:
+ CFLOG_TRACE(("CHTY: DEBUG\n"));
+ l->linktype = CFCTRL_SRV_DBG;
+ l->endpoint = 0x01; /* ACC SIDE */
+ l->chtype = 0x00; /* Single channel with interactive
+ * debug and print-out mixed.
+ */
+ break;
+
+ case CAIF_CHTY_DEBUG_INTERACT:
+ CFLOG_TRACE(("CHTY: IDEBUG\n"));
+ l->linktype = CFCTRL_SRV_DBG;
+ l->endpoint = 0x01; /* ACC SIDE */
+ l->chtype = 0x02; /* Interactive debug only */
+ break;
+
+ case CAIF_CHTY_DEBUG_TRACE:
+ CFLOG_TRACE(("CHTY: TRACE\n"));
+ l->linktype = CFCTRL_SRV_DBG;
+ l->endpoint = 0x01; /* ACC SIDE */
+ l->chtype = 0x01; /* Debug print-out only */
+ break;
+
+ case CAIF_CHTY_RFM:
+
+ CFLOG_TRACE(("CHTY: RFN\n"));
+ l->linktype = CFCTRL_SRV_RFM;
+ l->u.datagram.connid = s->u.rfm.connection_id;
+ strncpy(l->u.rfm.volume, s->u.rfm.volume,
+ sizeof(l->u.rfm.volume)-1);
+ l->u.rfm.volume[sizeof(l->u.rfm.volume)-1] = 0;
+ break;
+
+ case CAIF_CHTY_UTILITY:
+ CFLOG_TRACE(("CHTY: UTILTY\n"));
+ l->linktype = CFCTRL_SRV_UTIL;
+ l->endpoint = 0x00;
+ l->chtype = 0x00;
+ l->u.utility.fifosize_bufs = s->u.utility.fifosize_bufs;
+ l->u.utility.fifosize_kb = s->u.utility.fifosize_kb;
+ strncpy(l->u.utility.name, s->u.utility.name,
+ sizeof(l->u.utility.name)-1);
+ l->u.utility.name[sizeof(l->u.utility.name)-1] = 0;
+ l->u.utility.paramlen = s->u.utility.paramlen;
+ if (l->u.utility.paramlen > sizeof(l->u.utility.params))
+ l->u.utility.paramlen = sizeof(l->u.utility.params);
+ memcpy(l->u.utility.params, s->u.utility.params,
+ l->u.utility.paramlen);
+ break;
+
+ case CAIF_CHTY_RAW:
+ l->linktype = s->u._raw.channeltype;
+ l->endpoint = s->u._raw.endpoint;
+ l->chtype = s->u._raw.subtype;
+ break;
+
+ default:
+ CFLOG_TRACE(("CAIF_CHTY: Specified bad channel type '%d'\n",
+ s->type));
+ return -CFGLU_EINVAL;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(channel_config_2_link_param);
diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
new file mode 100644
index 0000000..3c05340
--- /dev/null
+++ b/net/caif/caif_dev.c
@@ -0,0 +1,520 @@
+/*
+ * CAIF Interface registration.
+ * Copyright (C) ST-Ericsson AB 2009
+ * Author: Sjur Brendeland/sjur.brandeland@...ricsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Borrowed heavily from file: pn_dev.c. Thanks to
+ * Remi Denis-Courmont <remi.denis-courmont@...ia.com>
+ * and Sakari Ailus <sakari.ailus@...ia.com>
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/kernel.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/netns/generic.h>
+#include <net/netns/generic.h>
+#include <net/net_namespace.h>
+#include <net/caif/caif_dev.h>
+#include <net/caif/caif_chr.h>
+#include <net/caif/generic/caif_layer.h>
+#include <net/caif/generic/cfpkt.h>
+#include <net/caif/generic/cfcnfg.h>
+#include <net/caif/caif_log.h>
+#include <net/pkt_sched.h>
+#include <net/caif/caif_config_util.h>
+MODULE_LICENSE("GPL");
+
+#define TIMEOUT (HZ*1000)
+/* Used for local tracking of the caif net devices */
+struct caif_device_entry {
+ struct layer layer;
+ struct list_head list;
+ atomic_t in_use;
+ atomic_t state;
+ uint16 phyid;
+ struct net_device *netdev;
+ wait_queue_head_t event;
+};
+
+struct caif_device_entry_list {
+ struct list_head list;
+ spinlock_t lock;
+};
+
+struct caif_net {
+ struct caif_device_entry_list caifdevs;
+};
+
+struct cfcnfg *cfg;
+int caif_net_id;
+
+
+int caif_dbg_level = CAIFLOG_LEVEL_WARNING;
+EXPORT_SYMBOL(caif_dbg_level);
+
+
+struct class caif_class = {
+ .name = "caif",
+};
+
+static ssize_t dbg_lvl_show(struct class *class, char *buf)
+{
+ return sprintf(buf, "%d\n", caif_dbg_level);
+}
+
+static ssize_t dbg_lvl_store(struct class *class, const char *buf,
+ size_t count)
+{
+ int val;
+
+
+ if ((sscanf(buf, "%d", &val) != 1) || (val < CAIFLOG_MIN_LEVEL)
+ || (val > CAIFLOG_MAX_LEVEL)) {
+ printk(KERN_WARNING "caif_dbg_level: Invalid value\n");
+ return -EINVAL;
+ }
+ caif_dbg_level = val;
+ return count;
+}
+
+CLASS_ATTR(dbg_lvl, 0644, dbg_lvl_show, dbg_lvl_store);
+
+struct caif_device_entry_list *caif_device_list(struct net *net)
+{
+ struct caif_net *caifn;
+ BUG_ON(!net);
+ caifn = net_generic(net, caif_net_id);
+ BUG_ON(!caifn);
+ return &caifn->caifdevs;
+}
+
+/* Allocate new CAIF device. */
+static struct caif_device_entry *caif_device_alloc(struct net_device *dev)
+{
+ struct caif_device_entry_list *caifdevs;
+ struct caif_device_entry *caifd;
+ caifdevs = caif_device_list(dev_net(dev));
+ BUG_ON(!caifdevs);
+ caifd = kzalloc(sizeof(*caifd), GFP_ATOMIC);
+ if (!caifd)
+ return NULL;
+ caifd->netdev = dev;
+ list_add(&caifd->list, &caifdevs->list);
+ init_waitqueue_head(&caifd->event);
+ return caifd;
+}
+
+static struct caif_device_entry *caif_get(struct net_device *dev)
+{
+ struct caif_device_entry_list *caifdevs =
+ caif_device_list(dev_net(dev));
+ struct caif_device_entry *caifd;
+ BUG_ON(!caifdevs);
+ list_for_each_entry(caifd, &caifdevs->list, list) {
+ if (caifd->netdev == dev)
+ return caifd;
+ }
+ return NULL;
+}
+
+static void caif_device_destroy(struct net_device *dev)
+{
+ struct caif_device_entry_list *caifdevs =
+ caif_device_list(dev_net(dev));
+ struct caif_device_entry *caifd;
+ ASSERT_RTNL();
+ if (dev->type != ARPHRD_CAIF)
+ return;
+
+ spin_lock_bh(&caifdevs->lock);
+ caifd = caif_get(dev);
+ if (caifd == NULL) {
+ spin_unlock_bh(&caifdevs->lock);
+ return;
+ }
+
+ list_del(&caifd->list);
+ spin_unlock_bh(&caifdevs->lock);
+
+ kfree(caifd);
+ return;
+}
+
+struct net_device *caif_device_get(struct net *net)
+{
+ struct caif_device_entry_list *caifdevs = caif_device_list(net);
+ struct caif_device_entry *caifd;
+ struct net_device *dev = NULL;
+ spin_lock_bh(&caifdevs->lock);
+ list_for_each_entry(caifd, &caifdevs->list, list) {
+ dev = caifd->netdev;
+ BUG_ON(!dev);
+ if ((dev->reg_state == NETREG_REGISTERED) &&
+ ((caifd->netdev->flags & IFF_UP)) == IFF_UP)
+ break;
+ dev = NULL;
+ }
+ spin_unlock_bh(&caifdevs->lock);
+ return dev;
+}
+
+static int transmit(struct layer *layer,
+ struct transmt_info *info, struct cfpkt *pkt)
+{
+ struct caif_device_entry *caifd =
+ container_of(layer, struct caif_device_entry, layer);
+ struct sk_buff *skb, *skb2;
+ int ret = -EINVAL;
+ struct transmt_info tmp;
+
+ skb = cfpkt_tonative(pkt);
+ memcpy(&tmp, skb->cb, sizeof(tmp));
+ memcpy(skb->cb, info, sizeof(*info));
+ skb->dev = caifd->netdev;
+
+ /*
+ * Don't allow SKB to be destroyed upon error, but signal resend
+ * notification to clients. We can't rely on the return value as
+ * congestion (NET_XMIT_CN) sometimes drops the packet, sometimes don't.
+ */
+ if (netif_queue_stopped(caifd->netdev))
+ return -EAGAIN;
+ skb2 = skb_get(skb);
+
+ ret = dev_queue_xmit(skb2);
+
+ if (!ret)
+ kfree_skb(skb);
+ else {
+ /* Restore the original skb private data */
+ memcpy(skb->cb, &tmp, sizeof(tmp));
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int modemcmd(struct layer *layr, enum caif_modemcmd ctrl)
+{
+ struct caif_device_entry *caifd;
+ struct caif_dev_common *caifdev;
+ caifd = container_of(layr, struct caif_device_entry, layer);
+ caifdev = netdev_priv(caifd->netdev);
+ if (ctrl == _CAIF_MODEMCMD_PHYIF_USEFULL) {
+ try_module_get(THIS_MODULE);
+ try_module_get(caifdev->net_dev_module);
+ atomic_set(&caifdev->in_use, 1);
+ atomic_set(&caifd->in_use, 1);
+ wake_up_interruptible(&caifd->event);
+
+ } else if (ctrl == _CAIF_MODEMCMD_PHYIF_USELESS) {
+ module_put(THIS_MODULE);
+ module_put(caifdev->net_dev_module);
+ atomic_set(&caifdev->in_use, 0);
+ atomic_set(&caifd->in_use, 0);
+ wake_up_interruptible(&caifd->event);
+ }
+ return 0;
+}
+
+/*
+ * Stuff received packets to associated sockets.
+ * On error, returns non-zero and releases the skb.
+ */
+static int receive(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pkttype, struct net_device *orig_dev)
+{
+ struct net *net;
+ struct cfpkt *pkt;
+ struct caif_device_entry *caifd;
+ net = dev_net(dev);
+ pkt = cfpkt_fromnative(CAIF_DIR_IN, skb);
+ caifd = caif_get(dev);
+
+ if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd)
+ return NET_RX_DROP;
+
+ if (caifd->layer.up->receive(caifd->layer.up, pkt))
+ return NET_RX_DROP;
+
+ return 0;
+}
+
+static struct packet_type caif_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_CAIF),
+ .func = receive,
+};
+
+static void dev_flowctrl(struct net_device *dev, int on)
+{
+ struct caif_device_entry *caifd = caif_get(dev);
+ if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd)
+ return;
+
+ caifd->layer.up->ctrlcmd(caifd->layer.up,
+ on ?
+ _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND :
+ _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND,
+ caifd->layer.id);
+}
+
+/* notify Caif of device events */
+static int caif_device_notify(struct notifier_block *me, unsigned long what,
+ void *arg)
+{
+ struct net_device *dev = arg;
+ struct caif_device_entry *caifd = NULL;
+ struct caif_dev_common *caifdev;
+ int res = -EINVAL;
+
+ if (dev->type != ARPHRD_CAIF)
+ return 0;
+
+ switch (what) {
+ case NETDEV_REGISTER:
+ printk(KERN_INFO "CAIF register:%s\n", dev->name);
+ caifd = caif_device_alloc(dev);
+ if (caifd == NULL)
+ break;
+ caifdev = netdev_priv(dev);
+ caifdev->flowctrl = dev_flowctrl;
+ atomic_set(&caifd->state, what);
+ res = dev_open(dev);
+ break;
+
+ case NETDEV_UP:
+ printk(KERN_INFO "CAIF up:%s\n", dev->name);
+ caifd = caif_get(dev);
+ if (caifd == NULL)
+ break;
+ caifdev = netdev_priv(dev);
+ if (atomic_read(&caifd->state) == NETDEV_UP) {
+ printk(KERN_INFO "CAIF dev:%s already up\n", dev->name);
+ break;
+ }
+ atomic_set(&caifd->state, what);
+ caifd->layer.transmit = transmit;
+ caifd->layer.modemcmd = modemcmd;
+
+ cfcnfg_add_phy_layer(get_caif_conf(),
+ caifdev->phy_type,
+ &caifd->layer,
+ &caifd->phyid,
+ caifdev->phy_pref);
+ strncpy(caifd->layer.name, dev->name,
+ sizeof(caifd->layer.name) - 1);
+ caifd->layer.name[sizeof(caifd->layer.name) - 1] = 0;
+ break;
+
+ case NETDEV_GOING_DOWN:
+ caifd = caif_get(dev);
+ if (caifd == NULL)
+ break;
+ printk(KERN_INFO "CAIF Going down:%s\n", dev->name);
+ atomic_set(&caifd->state, what);
+ if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd)
+ return -EINVAL;
+ caifd->layer.up->ctrlcmd(caifd->layer.up,
+ _CAIF_CTRLCMD_PHYIF_DOWN_IND,
+ caifd->layer.id);
+ res = wait_event_interruptible_timeout(caifd->event,
+ atomic_read(&caifd->in_use) == 0,
+ 10);
+ break;
+
+ case NETDEV_DOWN:
+ caifd = caif_get(dev);
+ if (caifd == NULL)
+ break;
+ printk(KERN_INFO "CAIF Down:%s\n", dev->name);
+ if (atomic_read(&caifd->in_use))
+ CAIFLOG_WARN("Unregistering an active CAIF device:"
+ "%s\n", dev->name);
+ cfcnfg_del_phy_layer(get_caif_conf(), &caifd->layer);
+ atomic_set(&caifd->state, what);
+ break;
+
+ case NETDEV_UNREGISTER:
+ caifd = caif_get(dev);
+ printk(KERN_INFO "CAIF unregister:%s\n", dev->name);
+ atomic_set(&caifd->state, what);
+ caif_device_destroy(dev);
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block caif_device_notifier = {
+ .notifier_call = caif_device_notify,
+ .priority = 0,
+};
+
+/* Per-namespace Caif devices handling */
+static int caif_init_net(struct net *net)
+{
+ struct caif_net *caifn;
+ int ret;
+ caifn = kmalloc(sizeof(*caifn), GFP_KERNEL);
+ if (!caifn)
+ return -ENOMEM;
+ INIT_LIST_HEAD(&caifn->caifdevs.list);
+ spin_lock_init(&caifn->caifdevs.lock);
+ ret = net_assign_generic(net, caif_net_id, caifn);
+ if (ret)
+ kfree(caifn);
+
+ return 0;
+}
+
+static void caif_exit_net(struct net *net)
+{
+ struct caif_net *caifn = net_generic(net, caif_net_id);
+ struct net_device *dev;
+ int res;
+ rtnl_lock();
+ for_each_netdev(net, dev) {
+ if (dev->type != ARPHRD_CAIF)
+ continue;
+ res = dev_close(dev);
+ caif_device_destroy(dev);
+ }
+ rtnl_unlock();
+ kfree(caifn);
+}
+
+struct cfcnfg *get_caif_conf(void)
+{
+ return cfg;
+}
+EXPORT_SYMBOL(get_caif_conf);
+
+int (*netdev_mgmt_func) (int action, union caif_action *param);
+EXPORT_SYMBOL(netdev_mgmt_func);
+
+static int (*caif_ioctl_func)(unsigned int cmd, unsigned long arg);
+
+void caif_register_ioctl(
+ int (*ioctl)(unsigned int cmd,
+ unsigned long arg))
+{
+ caif_ioctl_func = ioctl;
+}
+EXPORT_SYMBOL(caif_register_ioctl);
+
+int caif_ioctl(unsigned int cmd, unsigned long arg)
+{
+ printk(KERN_INFO "Enter: caif_ioctl\n");
+ if (caif_ioctl_func == NULL)
+ return -EINVAL;
+ return caif_ioctl_func(cmd, arg);
+}
+EXPORT_SYMBOL(caif_ioctl);
+
+int caifdev_adapt_register(struct caif_channel_config *config,
+ struct layer *adap_layer)
+{
+ struct cfctrl_link_param param;
+
+ if (channel_config_2_link_param(get_caif_conf(), config, ¶m) == 0)
+ /* Hook up the adaptation layer. */
+ if (cfcnfg_add_adaptation_layer(get_caif_conf(),
+ ¶m, adap_layer))
+ return 0;
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(caifdev_adapt_register);
+
+int caifdev_adapt_unregister(struct layer *adap_layer)
+{
+ return cfcnfg_del_adapt_layer(get_caif_conf(), adap_layer);
+}
+EXPORT_SYMBOL(caifdev_adapt_unregister);
+
+
+int caif_register_netdev(int (*netdev_mgmt)
+ (int action, union caif_action *param))
+{
+ netdev_mgmt_func = netdev_mgmt;
+ return 0;
+}
+EXPORT_SYMBOL(caif_register_netdev);
+
+void caif_unregister_netdev()
+{
+ netdev_mgmt_func = NULL;
+}
+EXPORT_SYMBOL(caif_unregister_netdev);
+
+static struct pernet_operations caif_net_ops = {
+ .init = caif_init_net,
+ .exit = caif_exit_net,
+};
+
+/* Initialize Caif devices list */
+int __init caif_device_init(void)
+{
+ int result;
+
+ cfg = cfcnfg_create();
+ if (!cfg) {
+ printk(KERN_WARNING "caifdev: err: can't create cfcnfg.\n");
+ goto err_cfcnfg_create_failed;
+ }
+
+ result = register_pernet_gen_device(&caif_net_id, &caif_net_ops);
+ if (result)
+ return result;
+ dev_add_pack(&caif_packet_type);
+ register_netdevice_notifier(&caif_device_notifier);
+
+ /* Register class for SYSFS. */
+ result = class_register(&caif_class);
+ if (unlikely(result)) {
+ printk(KERN_WARNING
+ "caifdev: err: %d, can't create sysfs node.\n", result);
+ goto err_class_register_failed;
+ }
+
+ /* Create SYSFS nodes. */
+ result = class_create_file(&caif_class, &class_attr_dbg_lvl);
+ if (unlikely(result)) {
+ printk(KERN_WARNING
+ "caifdev: err: %d, can't create sysfs node.\n", result);
+ goto err_sysfs_create_failed;
+ }
+ return result;
+
+err_sysfs_create_failed:
+ class_unregister(&caif_class);
+err_class_register_failed:
+err_cfcnfg_create_failed:
+ return -ENODEV;
+}
+
+void __exit caif_device_exit(void)
+{
+ class_remove_file(&caif_class, &class_attr_dbg_lvl);
+ class_unregister(&caif_class);
+ dev_remove_pack(&caif_packet_type);
+ unregister_pernet_gen_device(caif_net_id, &caif_net_ops);
+ unregister_netdevice_notifier(&caif_device_notifier);
+
+}
+
+module_init(caif_device_init);
+module_exit(caif_device_exit);
+
+
+
+
+
+
+
+
+
diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
new file mode 100644
index 0000000..492fcfb
--- /dev/null
+++ b/net/caif/caif_socket.c
@@ -0,0 +1,1560 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2009
+ * Author: Sjur Brændeland sjur.brandlenad@...ricsson.com
+ * Per Sigmond / Per.Sigmond@...ricsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/tcp.h>
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+
+/* Caif header files. */
+#include <linux/caif/caif_socket.h>
+#include <net/caif/generic/caif_layer.h>
+#include <linux/caif/caif_config.h>
+#include <net/caif/caif_log.h>
+#include <net/caif/caif_chr.h>
+
+MODULE_LICENSE("GPL");
+
+#define CHNL_SKT_READ_QUEUE_HIGH 2000
+#define CHNL_SKT_READ_QUEUE_LOW 100
+
+#ifdef CAIF_USE_CACHE
+int caif_max_links = 32;
+#endif
+
+int caif_sockbuf_size = 40000; /* FIXME: Check this value! */
+static struct kmem_cache *caif_sk_cachep;
+static atomic_t caif_nr_socks = ATOMIC_INIT(0);
+
+#define CONN_STATE_OPEN_BIT 1
+#define CONN_STATE_PENDING_BIT 2
+#define CONN_STATE_PEND_DESTROY_BIT 3
+#define CONN_REMOTE_SHUTDOWN_BIT 4
+
+#define TX_FLOW_ON_BIT 1
+#define RX_FLOW_ON_BIT 2
+
+#define STATE_IS_OPEN(cf_sk) test_bit(CONN_STATE_OPEN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define STATE_IS_REMOTE_SHUTDOWN(cf_sk) test_bit(CONN_REMOTE_SHUTDOWN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define STATE_IS_PENDING(cf_sk) test_bit(CONN_STATE_PENDING_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define STATE_IS_PENDING_DESTROY(cf_sk) test_bit(CONN_STATE_PEND_DESTROY_BIT,\
+ (void *) &(cf_sk)->conn_state)
+
+#define SET_STATE_PENDING_DESTROY(cf_sk) set_bit(CONN_STATE_PEND_DESTROY_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_STATE_OPEN(cf_sk) set_bit(CONN_STATE_OPEN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_STATE_CLOSED(cf_sk) clear_bit(CONN_STATE_OPEN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_PENDING_ON(cf_sk) set_bit(CONN_STATE_PENDING_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_PENDING_OFF(cf_sk) clear_bit(CONN_STATE_PENDING_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_REMOTE_SHUTDOWN(cf_sk) set_bit(CONN_REMOTE_SHUTDOWN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+
+#define RX_FLOW_IS_ON(cf_sk) test_bit(RX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define TX_FLOW_IS_ON(cf_sk) test_bit(TX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+
+#define SET_RX_FLOW_OFF(cf_sk) clear_bit(RX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define SET_RX_FLOW_ON(cf_sk) set_bit(RX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define SET_TX_FLOW_OFF(cf_sk) clear_bit(TX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define SET_TX_FLOW_ON(cf_sk) set_bit(TX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+
+#define SKT_READ_FLAG 0x01
+#define SKT_WRITE_FLAG 0x02
+
+#define MAX_CAIF_SOCKETS 200
+
+#ifdef CONFIG_DEBUG_FS
+struct dentry *debugfsdir;
+#include <linux/debugfs.h>
+
+static int max_caif_sockets = MAX_CAIF_SOCKETS;
+#endif
+
+/* The AF_CAIF socket */
+struct caifsock {
+ struct sock sk; /* NOTE: sk has to be the first member */
+ struct layer layer;
+ char name[CAIF_LAYER_NAME_SZ];
+ u32 conn_state;
+ u32 flow_state;
+ struct cfpktq *pktq;
+ int file_mode;
+ struct caif_channel_config config;
+ int read_queue_len;
+ spinlock_t read_queue_len_lock;
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs_device_dir;
+ atomic_t num_open;
+ atomic_t num_close;
+ atomic_t num_init;
+ atomic_t num_init_resp;
+ atomic_t num_init_fail_resp;
+ atomic_t num_deinit;
+ atomic_t num_deinit_resp;
+ atomic_t num_remote_shutdown_ind;
+ atomic_t num_tx_flow_off_ind;
+ atomic_t num_tx_flow_on_ind;
+ atomic_t num_rx_flow_off;
+ atomic_t num_rx_flow_on;
+#endif
+};
+
+static void drain_queue(struct caifsock *cf_sk);
+
+/** Packet Receive Callback function called from CAIF Stack */
+static int caif_sktrecv_cb(struct layer *layr, struct cfpkt *pkt)
+{
+ struct caifsock *cf_sk;
+ int read_queue_high;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+ cf_sk = container_of(layr, struct caifsock, layer);
+
+ CAIFLOG_TRACE2("[%s] data received: %d bytes.\n",
+ __func__, cfpkt_getlen(pkt));
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /*FIXME: This should be allowed finally!*/
+ CAIFLOG_TRACE("caif_sktrecv_cb called after close request\n");
+ cfpkt_destroy(pkt);
+ return 0;
+ }
+ /** NOTE: This function may be called in Tasklet context! */
+
+ /* The queue has its own lock */
+ CAIFLOG_TRACE("here %p %p\n", pkt, cf_sk->pktq);
+ cfpkt_queue(cf_sk->pktq, pkt, 0);
+
+ spin_lock(&cf_sk->read_queue_len_lock);
+ cf_sk->read_queue_len++;
+
+ read_queue_high = (cf_sk->read_queue_len > CHNL_SKT_READ_QUEUE_HIGH);
+ spin_unlock(&cf_sk->read_queue_len_lock);
+
+ if (RX_FLOW_IS_ON(cf_sk) && read_queue_high) {
+
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_rx_flow_off);
+#endif
+ SET_RX_FLOW_OFF(cf_sk);
+
+ /* Send flow off (NOTE: must not sleep) */
+ CAIFLOG_TRACE2
+ ("caif_sktrecv_cb(): sending flow OFF (queue len = %d)\n",
+ cf_sk->read_queue_len);
+ caif_assert(cf_sk->layer.dn);
+ caif_assert(cf_sk->layer.dn->ctrlcmd);
+
+ (void) cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
+ CAIF_MODEMCMD_FLOW_OFF_REQ);
+ }
+
+ /* Signal reader that data is available. */
+
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+
+ return 0;
+}
+
+/** Packet Flow Control Callback function called from CAIF */
+static void caif_sktflowctrl_cb(struct layer *layr, enum caif_ctrlcmd flow, int phyid)
+{
+ struct caifsock *cf_sk;
+
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ /** NOTE: This function may be called in Tasklet context! */
+ CAIFLOG_TRACE("AT flowctrl func called flow: %s.\n",
+ flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
+ flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
+ flow == CAIF_CTRLCMD_INIT_RSP ? "INIT_RSP" :
+ flow == CAIF_CTRLCMD_DEINIT_RSP ? "DEINIT_RSP" :
+ flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "INIT_FAIL_RSP" :
+ flow ==
+ CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ? "REMOTE_SHUTDOWN" :
+ "UKNOWN CTRL COMMAND");
+
+ cf_sk = container_of(layr, struct caifsock, layer);
+ switch (flow) {
+ case CAIF_CTRLCMD_FLOW_ON_IND:
+ CAIFLOG_TRACE("[%s:%d] CAIF_CTRLCMD_FLOW_ON_IND\n",
+ __func__, __LINE__);
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_tx_flow_on_ind);
+#endif
+ /* Signal reader that data is available. */
+ SET_TX_FLOW_ON(cf_sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_tx_flow_off_ind);
+#endif
+ CAIFLOG_TRACE("[%s:%d] CAIF_CTRLCMD_FLOW_OFF_IND\n",
+ __func__, __LINE__);
+ SET_TX_FLOW_OFF(cf_sk);
+ break;
+
+ case CAIF_CTRLCMD_INIT_RSP:
+ CAIFLOG_TRACE("[%s:%d] CAIF_CTRLCMD_INIT_RSP\n",
+ __func__, __LINE__);
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_init_resp);
+#endif
+ /* Signal reader that data is available. */
+ caif_assert(STATE_IS_OPEN(cf_sk));
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_ON(cf_sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_DEINIT_RSP:
+ CAIFLOG_TRACE("[%s:%d] CAIF_CTRLCMD_DEINIT_RSP\n",
+ __func__, __LINE__);
+
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_deinit_resp);
+#endif
+
+ caif_assert(!STATE_IS_OPEN(cf_sk));
+
+ SET_PENDING_OFF(cf_sk);
+
+ if (!STATE_IS_PENDING_DESTROY(cf_sk)) {
+ if (cf_sk->sk.sk_sleep != NULL)
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ }
+
+ sock_put(&cf_sk->sk);
+
+ break;
+
+ case CAIF_CTRLCMD_INIT_FAIL_RSP:
+ CAIFLOG_TRACE("[%s:%d] CAIF_CTRLCMD_INIT_FAIL_RSP\n",
+ __func__, __LINE__);
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_init_fail_resp);
+#endif
+ caif_assert(STATE_IS_OPEN(cf_sk));
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
+ CAIFLOG_TRACE("[%s:%d] CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND\n",
+ __func__, __LINE__);
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_remote_shutdown_ind);
+#endif
+ caif_assert(STATE_IS_OPEN(cf_sk));
+ caif_assert(STATE_IS_PENDING(cf_sk));
+
+ SET_REMOTE_SHUTDOWN(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+
+ drain_queue(cf_sk);
+ SET_RX_FLOW_ON(cf_sk);
+ cf_sk->file_mode = 0;
+
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ default:
+ CAIFLOG_TRACE("[%s:%d] Unexpected flow command %d\n",
+ __func__, __LINE__, flow);
+ }
+}
+
+
+
+static struct sk_buff *caif_alloc_send_skb(struct sock *sk,
+ unsigned long data_len,
+ int *err)
+{
+ struct sk_buff *skb;
+ unsigned int sk_allocation = sk->sk_allocation;
+
+ sk->sk_allocation |= GFP_KERNEL;
+
+ /* Allocate a buffer structure to hold the signal. */
+ skb = sock_alloc_send_skb(sk, data_len, 1, err);
+
+ sk->sk_allocation = sk_allocation;
+
+ return skb;
+}
+
+static int caif_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *m, size_t buf_len, int flags)
+
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ struct cfpkt *pkt = NULL;
+ size_t len;
+ int result;
+ struct sk_buff *skb;
+ ssize_t ret = -EIO;
+ int read_queue_low;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ if (cf_sk == NULL) {
+ CAIFLOG_TRACE("[%s:%d] private_data not set!\n",
+ __func__, __LINE__);
+ ret = -EBADFD;
+ goto read_error;
+ }
+
+ if (m->msg_iovlen != 1)
+ return -EOPNOTSUPP; /* Don't do multiple iovec entries yet */
+
+ if (unlikely(!buf_len))
+ return -EINVAL;
+
+ lock_sock(&(cf_sk->sk));
+
+ caif_assert(cf_sk->pktq);
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Socket is closed or closing. */
+ if (!STATE_IS_PENDING(cf_sk)) {
+ CAIFLOG_TRACE("socket is closed (by remote end)\n");
+ ret = -EPIPE;
+ } else {
+ CAIFLOG_TRACE("socket is closing...\n");
+ ret = -EBADF;
+ }
+ goto read_error;
+ }
+
+ /* Socket is open or opening. */
+ if (STATE_IS_PENDING(cf_sk)) {
+ CAIFLOG_TRACE("socket is opening...\n");
+
+ if (flags & MSG_DONTWAIT) {
+ /* We can't block. */
+ CAIFLOG_TRACE("state pending and MSG_DONTWAIT\n");
+ ret = -EAGAIN;
+ goto read_error;
+ }
+
+ /* Blocking mode; state is pending and we need to wait
+ * for its conclusion.
+ */
+ release_sock(&cf_sk->sk);
+
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ lock_sock(&(cf_sk->sk));
+
+ if (result == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ (" wait_event_interruptible woken by a signal (1)");
+ ret = -ERESTARTSYS;
+ goto read_error;
+ }
+ }
+
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ CAIFLOG_TRACE("received remote_shutdown indication\n");
+ ret = -ESHUTDOWN;
+ goto read_error;
+ }
+
+ /* Block if we don't have any received buffers.
+ * The queue has its own lock.
+ */
+ while ((pkt = cfpkt_qpeek(cf_sk->pktq)) == NULL) {
+
+ if (flags & MSG_DONTWAIT) {
+ CAIFLOG_TRACE("caif_recvmsg: MSG_DONTWAIT\n");
+ ret = -EAGAIN;
+ goto read_error;
+ }
+ CAIFLOG_TRACE2("[%s:%d] wait_event\n", __func__, __LINE__);
+
+ /* Let writers in. */
+ release_sock(&cf_sk->sk);
+
+ /* Block reader until data arrives or socket is closed. */
+ if (wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ cfpkt_qpeek(cf_sk->pktq)
+ || STATE_IS_REMOTE_SHUTDOWN(cf_sk)
+ || !STATE_IS_OPEN(cf_sk)) ==
+ -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("caif_recvmsg:"
+ " wait_event_interruptible woken by "
+ "a signal, signal_pending(current) = %d\n",
+ signal_pending(current));
+ return -ERESTARTSYS;
+ }
+
+ CAIFLOG_TRACE2("[%s:%d] awake\n", __func__, __LINE__);
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ CAIFLOG_TRACE("received remote_shutdown indication\n");
+ ret = -ESHUTDOWN;
+ goto read_error_no_unlock;
+ }
+
+ /* I want to be alone on cf_sk (except status and queue). */
+ lock_sock(&(cf_sk->sk));
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Someone closed the link, report error. */
+ CAIFLOG_TRACE("[%s:%d] remote end shutdown!\n",
+ __func__, __LINE__);
+ ret = -EPIPE;
+ goto read_error;
+ }
+ }
+
+ /* The queue has its own lock. */
+ len = cfpkt_getlen(pkt);
+
+ /* Check max length that can be copied. */
+ if (len > buf_len) {
+ CAIFLOG_TRACE("caif_recvmsg: user buffer too small\n");
+ ret = -EINVAL;
+ goto read_error;
+ }
+
+ /* Get packet from queue.
+ * The queue has its own lock.
+ */
+ pkt = cfpkt_dequeue(cf_sk->pktq);
+
+ spin_lock(&cf_sk->read_queue_len_lock);
+ cf_sk->read_queue_len--;
+ read_queue_low = (cf_sk->read_queue_len < CHNL_SKT_READ_QUEUE_LOW);
+ spin_unlock(&cf_sk->read_queue_len_lock);
+
+ if (!RX_FLOW_IS_ON(cf_sk) && read_queue_low) {
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_rx_flow_on);
+#endif
+ SET_RX_FLOW_ON(cf_sk);
+
+ /* Send flow on. */
+ CAIFLOG_TRACE2
+ ("caif_recvmsg(): sending flow ON (queue len = %d)\n",
+ cf_sk->read_queue_len);
+ caif_assert(cf_sk->layer.dn);
+ caif_assert(cf_sk->layer.dn->ctrlcmd);
+ (void) cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
+ CAIF_MODEMCMD_FLOW_ON_REQ);
+
+ caif_assert(cf_sk->read_queue_len >= 0);
+ }
+ skb = cfpkt_tonative(pkt);
+ result = skb_copy_datagram_iovec(skb, 0, m->msg_iov, len);
+ if (result) {
+ CAIFLOG_TRACE("caif_recvmsg: cfpkt_raw_extract failed\n");
+ cfpkt_destroy(pkt);
+ ret = -EFAULT;
+ goto read_error;
+ }
+ if (unlikely(buf_len < len)) {
+ len = buf_len;
+ m->msg_flags |= MSG_TRUNC;
+ }
+
+ /* Free packet. */
+ skb_free_datagram(sk, skb);
+
+ /* Let the others in. */
+ release_sock(&cf_sk->sk);
+ CAIFLOG_EXIT("");
+ return len;
+
+read_error:
+ release_sock(&cf_sk->sk);
+read_error_no_unlock:
+ CAIFLOG_EXIT("");
+ return ret;
+}
+
+/* Send a signal as a consequence of sendmsg, sendto or caif_sendmsg. */
+static int caif_sendmsg(struct kiocb *kiocb, struct socket *sock,
+ struct msghdr *msg, size_t len)
+{
+
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ void *payload;
+ size_t payload_size = msg->msg_iov->iov_len;
+ struct cfpkt *pkt = NULL;
+ struct transmt_info info;
+ unsigned char *txbuf;
+ int err = 0;
+ ssize_t ret = -EIO;
+ int result;
+ struct sk_buff *skb;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+ caif_assert(msg->msg_iovlen == 1);
+
+ if (cf_sk == NULL) {
+ CAIFLOG_TRACE("[%s:%d] private_data not set!\n",
+ __func__, __LINE__);
+ ret = -EBADFD;
+ goto write_error_no_unlock;
+ }
+
+ if (unlikely(msg->msg_iov->iov_base == NULL)) {
+ CAIFLOG_WARN("Buffer is NULL.\n");
+ ret = -EINVAL;
+ goto write_error_no_unlock;
+ }
+
+ payload = msg->msg_iov->iov_base;
+ if (payload_size > CAIF_MAX_PAYLOAD_SIZE) {
+ CAIFLOG_TRACE("[%s:%d] buffer too long\n", __func__, __LINE__);
+ ret = -EINVAL;
+ goto write_error_no_unlock;
+ }
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ caif_assert(cf_sk->pktq);
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Socket is closed or closing */
+ if (!STATE_IS_PENDING(cf_sk)) {
+ CAIFLOG_TRACE("socket is closed (by remote end)\n");
+ ret = -EPIPE;
+ } else {
+ CAIFLOG_TRACE("socket is closing...\n");
+ ret = -EBADF;
+ }
+ goto write_error;
+ }
+
+ /* Socket is open or opening */
+ if (STATE_IS_PENDING(cf_sk)) {
+ CAIFLOG_TRACE("socket is opening...\n");
+
+ if (msg->msg_flags & MSG_DONTWAIT) {
+ /* We can't block */
+ CAIFLOG_TRACE("state pending and MSG_DONTWAIT\n");
+ ret = -EAGAIN;
+ goto write_error;
+ }
+
+ /* Let readers in */
+ release_sock(&cf_sk->sk);
+
+ /* Blocking mode; state is pending and we need to wait
+ for its conclusion */
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ if (result == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ (" wait_event_interruptible woken by a signal (1)");
+ ret = -ERESTARTSYS;
+ goto write_error;
+ }
+ }
+
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ CAIFLOG_TRACE("received remote_shutdown indication\n");
+ ret = -ESHUTDOWN;
+ goto write_error;
+ }
+
+ if (!TX_FLOW_IS_ON(cf_sk)) {
+
+ /* Flow is off. Check non-block flag */
+ if (msg->msg_flags & MSG_DONTWAIT) {
+ CAIFLOG_TRACE
+ ("caif_sendmsg: MSG_DONTWAIT and tx flow off");
+ ret = -EAGAIN;
+ goto write_error;
+ }
+
+ /* release lock before waiting */
+ release_sock(&cf_sk->sk);
+
+ /* Wait until flow is on or socket is closed */
+ if (wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ TX_FLOW_IS_ON(cf_sk)
+ || !STATE_IS_OPEN(cf_sk)
+ || STATE_IS_REMOTE_SHUTDOWN(cf_sk)
+ ) == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("caif_sendmsg:"
+ " wait_event_interruptible woken by a signal");
+ ret = -ERESTARTSYS;
+ goto write_error_no_unlock;
+ }
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* someone closed the link, report error */
+ CAIFLOG_TRACE("[%s:%d] remote end shutdown!\n",
+ __func__, __LINE__);
+ ret = -EPIPE;
+ goto write_error;
+ }
+
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ CAIFLOG_TRACE("received remote_shutdown indication\n");
+ ret = -ESHUTDOWN;
+ goto write_error;
+ }
+ }
+
+ /* Create packet, buf=NULL means no copying */
+ skb = caif_alloc_send_skb(sk,
+ payload_size + CAIF_NEEDED_HEADROOM +
+ CAIF_NEEDED_TAILROOM,
+ &err);
+ skb_reserve(skb, CAIF_NEEDED_HEADROOM);
+ pkt = cfpkt_fromnative(CAIF_DIR_OUT, skb);
+ caif_assert((void *)pkt == (void *)skb);
+
+ if (pkt == NULL) {
+ CAIFLOG_TRACE
+ ("caif_sendmsg: cfpkt_create_pkt returned NULL\n");
+ ret = -EIO;
+ goto write_error;
+ }
+
+ if (!cfpkt_raw_append(pkt, (void **) &txbuf, payload_size)) {
+ CAIFLOG_TRACE("caif_sendmsg: cfpkt_raw_append failed\n");
+ cfpkt_destroy(pkt);
+ ret = -EINVAL;
+ goto write_error;
+ }
+
+ /* Copy data into buffer. */
+ if (copy_from_user(txbuf, payload, payload_size)) {
+ CAIFLOG_TRACE
+ ("caif_sendmsg: copy_from_user returned non zero.\n");
+ cfpkt_destroy(pkt);
+ ret = -EINVAL;
+ goto write_error;
+ }
+ memset(&info, 0, sizeof(info));
+
+ /* Send the packet down the stack. */
+ caif_assert(cf_sk->layer.dn);
+ caif_assert(cf_sk->layer.dn->transmit);
+
+ do {
+ ret = cf_sk->layer.dn->transmit(cf_sk->layer.dn,
+ &info, pkt);
+
+ if (likely((ret >= 0) || (ret != -EAGAIN)))
+ break;
+
+ /* EAGAIN - retry */
+ if (msg->msg_flags & MSG_DONTWAIT) {
+ CAIFLOG_TRACE
+ ("NONBLOCK and transmit failed, error = %d\n",
+ ret);
+ ret = -EAGAIN;
+ goto write_error;
+ }
+
+ /* Let readers in */
+ release_sock(&cf_sk->sk);
+
+ /* Wait until flow is on or socket is closed */
+ if (wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ TX_FLOW_IS_ON(cf_sk)
+ || !STATE_IS_OPEN(cf_sk)
+ || STATE_IS_REMOTE_SHUTDOWN(cf_sk)
+ ) == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("wait_event_interruptible woken by a signal");
+ ret = -ERESTARTSYS;
+ goto write_error_no_unlock;
+ }
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ } while (ret == -EAGAIN);
+
+ if (ret < 0) {
+ cfpkt_destroy(pkt);
+ CAIFLOG_TRACE("transmit failed, error = %d\n",
+ ret);
+
+ goto write_error;
+ }
+
+ release_sock(&cf_sk->sk);
+ CAIFLOG_EXIT("");
+ return payload_size;
+
+write_error:
+ release_sock(&cf_sk->sk);
+write_error_no_unlock:
+ CAIFLOG_EXIT("");
+ return ret;
+}
+
+static unsigned int caif_poll(struct file *file, struct socket *sock,
+ poll_table *wait)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ u32 mask = 0;
+ CAIFLOG_ENTER("");
+
+ poll_wait(file, sk->sk_sleep, wait);
+ lock_sock(&(cf_sk->sk));
+ if (cfpkt_qpeek(cf_sk->pktq) != NULL)
+ mask |= (POLLIN | POLLRDNORM);
+ if (!STATE_IS_OPEN(cf_sk))
+ mask |= POLLHUP;
+ else if (TX_FLOW_IS_ON(cf_sk))
+ mask |= (POLLOUT | POLLWRNORM);
+ release_sock(&cf_sk->sk);
+ CAIFLOG_TRACE("[%s:%d] poll mask=0x%04x...\n",
+ __func__, __LINE__, mask);
+ CAIFLOG_EXIT("");
+ return mask;
+}
+
+static void drain_queue(struct caifsock *cf_sk)
+{
+ struct cfpkt *pkt = NULL;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+ CAIFLOG_TRACE("pktq = %p pkt=%p\n", cf_sk->pktq, pkt);
+
+ /* Empty the queue */
+ do {
+ /* The queue has its own lock */
+ pkt = cfpkt_dequeue(cf_sk->pktq);
+ CAIFLOG_TRACE("pktq = %p pkt=%p\n", cf_sk->pktq, pkt);
+
+ if (!pkt)
+ break;
+
+ CAIFLOG_TRACE
+ ("[%s:%d] drain_queue(): freeing packet from read queue\n",
+ __func__, __LINE__);
+ cfpkt_destroy(pkt);
+
+ } while (1);
+
+ spin_lock(&cf_sk->read_queue_len_lock);
+ cf_sk->read_queue_len = 0;
+ spin_unlock(&cf_sk->read_queue_len_lock);
+}
+
+
+static int setsockopt(struct socket *sock,
+ int lvl, int opt, char __user *ov, int ol)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ struct caif_channel_opt confopt;
+ int res;
+
+ if (lvl != SOL_CAIF) {
+ CAIFLOG_TRACE("setsockopt bad level\n");
+ return -ENOPROTOOPT;
+ }
+
+ switch (opt) {
+ case CAIF_CHANNEL_OPT:
+ if (ol < sizeof(struct caif_channel_opt)) {
+ CAIFLOG_TRACE("setsockopt"
+ " CAIF_CHANNEL_CONFIG bad size\n");
+ return -EINVAL;
+ }
+ res = copy_from_user(&confopt, ov, sizeof(confopt));
+ if (res)
+ return res;
+ lock_sock(&(cf_sk->sk));
+ cf_sk->config.priority = confopt.priority;
+ cf_sk->config.phy_pref = confopt.link_selector;
+ strncpy(cf_sk->config.phy_name, confopt.link_name,
+ sizeof(cf_sk->config.phy_name));
+ CAIFLOG_TRACE("Setting sockopt pri=%d pref=%d name=%s\n",
+ cf_sk->config.priority,
+ cf_sk->config.phy_pref,
+ cf_sk->config.phy_name);
+ release_sock(&cf_sk->sk);
+ return 0;
+/* TODO: Implement the remaining options:
+ * case CAIF_REQ_PARAM_OPT:
+ * case CAIF_RSP_PARAM_OPT:
+ * case CAIF_UTIL_FLOW_OPT:
+ * case CAIF_CONN_INFO_OPT:
+ * case CAIF_CONN_ID_OPT:
+ */
+ default:
+ CAIFLOG_TRACE("setsockopt: unhandled option %d\n",
+ opt);
+ return -EINVAL;
+ }
+
+
+}
+
+static int getsockopt(struct socket *sock,
+ int lvl, int opt, char __user *ov, int __user *ol)
+{
+ return -EINVAL;
+}
+
+static int caif_channel_config(struct caifsock *cf_sk,
+ struct sockaddr *sock_addr, int len,
+ struct caif_channel_config *config)
+{
+ struct sockaddr_caif *addr = (struct sockaddr_caif *)sock_addr;
+
+
+ if (len != sizeof(struct sockaddr_caif)) {
+ CAIFLOG_TRACE("Bad address len (%d,%d)\n",
+ len, sizeof(struct sockaddr_caif));
+ return -EINVAL;
+ }
+ if (sock_addr->sa_family != AF_CAIF) {
+ CAIFLOG_TRACE("Bad address family (%d)\n",
+ sock_addr->sa_family);
+ return -EAFNOSUPPORT;
+ }
+
+ switch (cf_sk->sk.sk_protocol) {
+ case CAIFPROTO_AT:
+ config->type = CAIF_CHTY_AT;
+ break;
+ case CAIFPROTO_DATAGRAM:
+ config->type = CAIF_CHTY_DATAGRAM;
+ break;
+ case CAIFPROTO_DATAGRAM_LOOP:
+ config->type = CAIF_CHTY_DATAGRAM_LOOP;
+ config->u.dgm.connection_id = addr->u.dgm.connection_id;
+ break;
+ case CAIFPROTO_UTIL:
+ config->type = CAIF_CHTY_UTILITY;
+ strncpy(config->u.utility.name, addr->u.util.service,
+ sizeof(config->u.utility.name));
+ /* forcing the end of string to be null-terminated */
+ config->u.utility.name[sizeof(config->u.utility.name)-1] = '\0';
+ break;
+ case CAIFPROTO_RFM:
+ config->type = CAIF_CHTY_RFM;
+ config->u.rfm.connection_id = addr->u.rfm.connection_id;
+ strncpy(config->u.rfm.volume, addr->u.rfm.volume,
+ sizeof(config->u.rfm.volume));
+ /* forcing the end of string to be null-terminated */
+ config->u.rfm.volume[sizeof(config->u.rfm.volume)-1] = '\0';
+ break;
+ default:
+ CAIFLOG_TRACE("Bad caif protocol type (%d)\n",
+ cf_sk->sk.sk_protocol);
+ return -EINVAL;
+ }
+ CAIFLOG_TRACE("Setting connect param PROTO=%s\n",
+ (cf_sk->sk.sk_protocol == CAIFPROTO_AT) ?
+ "CAIFPROTO_AT" :
+ (cf_sk->sk.sk_protocol == CAIFPROTO_DATAGRAM) ?
+ "CAIFPROTO_DATAGRAM" :
+ (cf_sk->sk.sk_protocol == CAIFPROTO_DATAGRAM_LOOP) ?
+ "CAIFPROTO_DATAGRAM_LOOP" :
+ (cf_sk->sk.sk_protocol == CAIFPROTO_UTIL) ?
+ "CAIFPROTO_UTIL" :
+ (cf_sk->sk.sk_protocol == CAIFPROTO_RFM) ?
+ "CAIFPROTO_RFM" : "ERROR");
+ return 0;
+}
+
+
+int caif_connect(struct socket *sock, struct sockaddr *uservaddr,
+ int sockaddr_len, int flags)
+{
+ struct caifsock *cf_sk = NULL;
+ int result = -1;
+ int mode = 0;
+ int ret = -EIO;
+ struct sock *sk = sock->sk;
+
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ BUG_ON(sk == NULL);
+
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ CAIFLOG_TRACE("cf_sk=%p OPEN=%d, TX_FLOW=%d, RX_FLOW=%d\n", cf_sk,
+ STATE_IS_OPEN(cf_sk),
+ TX_FLOW_IS_ON(cf_sk), RX_FLOW_IS_ON(cf_sk));
+
+ sk->sk_state = TCP_CLOSE;
+ sock->state = SS_UNCONNECTED;
+
+ /* FIXME: SOCK_DGRAM should be removed? */
+ if (sock->type == SOCK_DGRAM || sock->type == SOCK_SEQPACKET) {
+ sock->state = SS_CONNECTED;
+ sk->sk_state = TCP_ESTABLISHED;
+ } else
+ goto out;
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ ret = caif_channel_config(cf_sk, uservaddr, sockaddr_len,
+ &cf_sk->config);
+ if (ret) {
+ CAIFLOG_TRACE
+ ("[%s:%d] Cannot set socket address\n",
+ __func__, __LINE__);
+ goto open_error;
+ }
+
+
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_open);
+#endif
+ mode = SKT_READ_FLAG | SKT_WRITE_FLAG;
+
+ /* If socket is not open, make sure socket is in fully closed state */
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Has link close response been received
+ (if we ever sent it)? */
+ if (STATE_IS_PENDING(cf_sk)) {
+ /* Still waiting for close response from remote.
+ If opened non-blocking, report "would block" */
+ if (flags & MSG_DONTWAIT) {
+ CAIFLOG_TRACE("MSG_DONTWAIT"
+ " && close pending\n");
+ ret = -EAGAIN;
+ goto open_error;
+ }
+
+ CAIFLOG_TRACE
+ ("wait for close response from remote...\n");
+
+ release_sock(&cf_sk->sk);
+
+ /* Blocking mode; close is pending and we need to wait
+ for its conclusion */
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ lock_sock(&(cf_sk->sk));
+ if (result == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("wait_event_interruptible woken"
+ "by a signal (1)");
+ ret = -ERESTARTSYS;
+ goto open_error;
+ }
+ }
+ }
+
+ /* socket is now either closed, pending open or open */
+ if (STATE_IS_OPEN(cf_sk) && !STATE_IS_PENDING(cf_sk)) {
+ /* Open */
+ CAIFLOG_TRACE
+ ("[%s:%d] Socket is already opened (cf_sk=%p) check access "
+ "f_flags = 0x%x file_mode = 0x%x\n",
+ __func__, __LINE__, cf_sk, mode, cf_sk->file_mode);
+
+ if (mode & cf_sk->file_mode) {
+ CAIFLOG_TRACE
+ ("[%s:%d] Access mode already in use 0x%x \n",
+ __func__, __LINE__, mode);
+ ret = -EBUSY;
+ goto open_error;
+ }
+ } else {
+ /* We are closed or pending open.
+ * If closed: send link setup
+ * If pending open: link setup already sent (we could have been
+ * interrupted by a signal last time)
+ */
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* First opening of file; connect lower layers: */
+ /* Drain queue (very unlikely) */
+ drain_queue(cf_sk);
+
+ cf_sk->layer.receive = caif_sktrecv_cb;
+
+ SET_STATE_OPEN(cf_sk);
+ SET_PENDING_ON(cf_sk);
+
+ /* Register this channel. */
+ result =
+ caifdev_adapt_register(&cf_sk->config,
+ &cf_sk->layer);
+ if (result < 0) {
+ CAIFLOG_TRACE
+ ("[%s:%d]: can't register channel\n",
+ __func__, __LINE__);
+ ret = -EIO;
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ goto open_error;
+ }
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_init);
+#endif
+ }
+
+ /* If opened non-blocking, report "success".
+ */
+ if (flags & MSG_DONTWAIT) {
+ CAIFLOG_TRACE("[%s:%d]: MSG_DONTWAIT success\n",
+ __func__, __LINE__);
+ ret = 0;
+ goto open_success;
+ }
+
+ CAIFLOG_TRACE("WAIT FOR CONNECT RESPONSE \n");
+
+ /* release lock before waiting */
+ release_sock(&cf_sk->sk);
+
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ lock_sock(&(cf_sk->sk));
+
+ if (result == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("%s: "
+ "wait_event_interruptible woken by a signal (2)",
+ __func__);
+ ret = -ERESTARTSYS;
+ goto open_error;
+ }
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Lower layers said "no" */
+ CAIFLOG_TRACE
+ ("[%s:%d]: CLOSED RECEIVED\n",
+ __func__, __LINE__);
+ ret = -EPIPE;
+ goto open_error;
+ }
+
+ CAIFLOG_TRACE("[%s:%d]: CONNECT RECEIVED\n",
+ __func__, __LINE__);
+ }
+open_success:
+ /* Open is ok */
+ cf_sk->file_mode |= mode;
+
+ CAIFLOG_TRACE("[%s:%d] Open - file mode = %x\n",
+ __func__, __LINE__, cf_sk->file_mode);
+
+ CAIFLOG_TRACE("[%s:%d] CONNECTED \n", __func__, __LINE__);
+
+ release_sock(&cf_sk->sk);
+ CAIFLOG_EXIT("");
+ return 0;
+open_error:
+ release_sock(&cf_sk->sk);
+out:
+ CAIFLOG_EXIT("");
+ return ret;
+}
+
+static int caif_shutdown(struct socket *sock, int how)
+{
+ struct caifsock *cf_sk = NULL;
+ int result;
+ int tx_flow_state_was_on;
+ struct sock *sk = sock->sk;
+ int res = 0;
+
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ if (how != SHUT_RDWR)
+ return -EOPNOTSUPP; /* FIXME: ENOTSUP in userland for POSIX */
+
+ cf_sk = container_of(sk, struct caifsock, sk);
+ if (cf_sk == NULL) {
+ CAIFLOG_TRACE("[%s] COULD NOT FIND SOCKET\n", __func__);
+ return -EBADF;
+ }
+
+ /* I want to be alone on cf_sk (except status queue) */
+ lock_sock(&(cf_sk->sk));
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_close);
+#endif
+
+ /* Is the socket open? */
+ if (!STATE_IS_OPEN(cf_sk)) {
+ CAIFLOG_TRACE("[%s:%d] socket not open (cf_sk=%p) \n",
+ __func__, __LINE__, cf_sk);
+ release_sock(&cf_sk->sk);
+ return 0;
+ }
+
+ /* Is the socket waiting for link setup response? */
+ if (STATE_IS_PENDING(cf_sk)) {
+ CAIFLOG_TRACE("[%s:%d] Socket is open pending (cf_sk=%p) \n",
+ __func__, __LINE__, cf_sk);
+ release_sock(&cf_sk->sk);
+ /* What to return here? Seems that EBADF is the closest :-| */
+ return -EBADF;
+ }
+ /* IS_CLOSED have double meaning:
+ * 1) Spontanous Remote Shutdown Request.
+ * 2) Ack on a channel teardown(disconnect)
+ * Must clear bit in case we previously received
+ * remote shudown request.
+ */
+
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_ON(cf_sk);
+ sock->state = SS_DISCONNECTING; /* FIXME: Update the sock->states */
+ tx_flow_state_was_on = TX_FLOW_IS_ON(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ sock_hold(&cf_sk->sk);
+ result = caifdev_adapt_unregister(&cf_sk->layer);
+
+ if (result < 0) {
+ CAIFLOG_TRACE
+ ("caif_shutdown: caifdev_adapt_unregister() failed\n");
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ release_sock(&cf_sk->sk);
+ return -EIO;
+ }
+#ifdef CONFIG_DEBUG_FS
+ atomic_inc(&cf_sk->num_deinit);
+#endif
+
+ /* We don't wait for close response here. Close pending state will be
+ cleared by flow control callback when response arrives. */
+
+ /* Empty the queue */
+ drain_queue(cf_sk);
+ SET_RX_FLOW_ON(cf_sk);
+ cf_sk->file_mode = 0;
+
+
+ release_sock(&cf_sk->sk);
+ return res;
+}
+static ssize_t caif_sock_no_sendpage(struct socket *sock,
+ struct page *page,
+ int offset, size_t size, int flags)
+{
+ return -EOPNOTSUPP;
+}
+
+/* This function is called as part of close. */
+static int caif_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = NULL;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ caif_assert(sk != NULL);
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ caif_shutdown(sock, SHUT_RDWR);
+ lock_sock(&(cf_sk->sk));
+ /* NOTE: This is how the sock->sk structure is used all over the linux
+ * socket implementation. Since there is no locking protecting
+ * the sock->sk pointer, the linux socket implementation do not
+ * support multiple threads using the same socket descriptor,
+ * since if one of the threads close the socket, the other
+ * threads may end up accessing a pointer to NULL. See for
+ * instance sock_setsockopt in net/socket.c, it uses sock->sk
+ * without checking if its value is NULL. */
+ sock->sk = NULL;
+
+ /* Unlink the socket from the hunt name table. */
+
+
+ /* Trigger the pending attachs from and to the socket. This needs to
+ * be done before the socket starts to be released. */
+
+
+ /* Remove pending new link requests. */
+
+ /* Detach the socket from its process context by making it orphan. */
+ sock_orphan(sk);
+
+ /* Setting SHUTDOWN_MASK means that both send and receive are shutdown
+ * for the socket. */
+ sk->sk_shutdown = SHUTDOWN_MASK;
+
+ /* Set the socket state to closed, the TCP_CLOSE macro is used when
+ * closing any socket. */
+ sk->sk_state = TCP_CLOSE;
+
+ /* Flush out this sockets receive queue. */
+ drain_queue(cf_sk);
+
+ /* Finally release the socket. */
+ STATE_IS_PENDING_DESTROY(cf_sk);
+ release_sock(&cf_sk->sk);
+ sock_put(sk);
+
+ return 0;
+
+ /* The rest of the cleanup will be handled from the
+ * caif_sock_destructor */
+}
+static int caif_sock_ioctl(struct socket *sock,
+ unsigned int cmd,
+ unsigned long arg)
+
+{
+ return caif_ioctl(cmd, arg);
+}
+
+static struct proto_ops caif_ops = {
+ .family = PF_CAIF,
+ .owner = THIS_MODULE,
+ .release = caif_release,
+ .bind = sock_no_bind,
+ .connect = caif_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = sock_no_getname,
+ .poll = caif_poll,
+ .ioctl = caif_sock_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = caif_shutdown,
+ .setsockopt = setsockopt,
+ .getsockopt = getsockopt,
+ .sendmsg = caif_sendmsg,
+ .recvmsg = caif_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = caif_sock_no_sendpage,
+};
+
+/* This function is called when a socket is finally destructed. */
+static void caif_sock_destructor(struct sock *sk)
+{
+ struct caifsock *cf_sk = NULL;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ /* Error checks. */
+ caif_assert(!atomic_read(&sk->sk_wmem_alloc));
+ caif_assert(sk_unhashed(sk));
+ caif_assert(!sk->sk_socket);
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ CAIFLOG_TRACE("Attempt to release alive caif socket: 0x%p", sk);
+ return;
+ }
+
+ lock_sock(&(cf_sk->sk));
+
+ if (STATE_IS_OPEN(cf_sk)) {
+ CAIFLOG_TRACE
+ ("[%s:%d] socket is opened (cf_sk=%p)"
+ " file_mode = 0x%x\n", __func__, __LINE__,
+ cf_sk, cf_sk->file_mode);
+ release_sock(&cf_sk->sk);
+ return;
+ }
+
+ CAIFLOG_TRACE("pktq = %p \n", cf_sk->pktq);
+ drain_queue(cf_sk);
+ CAIFLOG_TRACE("pktq = %p \n", cf_sk->pktq);
+
+ cfglu_free(cf_sk->pktq);
+
+#ifdef CONFIG_DEBUG_FS
+ if (cf_sk->debugfs_device_dir != NULL)
+ debugfs_remove_recursive(cf_sk->debugfs_device_dir);
+#endif
+
+ release_sock(&cf_sk->sk);
+ CAIFLOG_WARN("caif_sock_destructor: Removing socket %s\n",
+ cf_sk->name);
+ /* Decrease the global caif socket counter. */
+ atomic_dec(&caif_nr_socks);
+ return;
+}
+
+
+
+static int caif_create(struct net *net, struct socket *sock, int protocol)
+{
+ struct sock *sk = NULL;
+ struct caifsock *cf_sk = NULL;
+ int result = 0;
+
+ static struct proto prot = {.name = "PF_CAIF",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct caifsock),
+ };
+ prot.slab = caif_sk_cachep;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
+
+
+ if (protocol < 0 || protocol >= CAIFPROTO_MAX)
+ return -EPROTONOSUPPORT;
+
+ /* Set the socket state to unconnected. The socket state is really
+ * not used at all in the net/core or socket.c but the
+ * initialization makes sure that sock->state is not uninitialized.
+ * An CAIF socket is always unconnected, since it is connectionless.
+ */
+ sock->state = SS_UNCONNECTED;
+
+ /* Allocate the CAIF sock structure from the socket cache. Upon
+ * success the struct sock data structure is zeroed and thus partially
+ * initialized. The caif specific part of the data structure is left as
+ * is to avoid clearing the spid instance number.
+ */
+
+ sk = sk_alloc(net, PF_CAIF, GFP_KERNEL, &prot);
+
+ BUG_ON(sk == NULL);
+
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ /* Store the protocol */
+ sk->sk_protocol = (unsigned char) protocol;
+
+ CAIFLOG_TRACE("[%s:%d] cf_sk=%p \n", __func__, __LINE__, cf_sk);
+
+ spin_lock_init(&cf_sk->read_queue_len_lock);
+
+ /* Fill in some information concerning the misc socket. */
+ snprintf(cf_sk->name, sizeof(cf_sk->name), "cf_sk%d",
+ atomic_read(&caif_nr_socks));
+ snprintf(cf_sk->config.name, sizeof(cf_sk->config.name), "caifconf%d",
+ atomic_read(&caif_nr_socks));
+
+
+ /* The sock->type specifies the socket type to use. The CAIF socket is
+ * a datagram in the sence that it is packet based. The reliability of
+ * the CAIF socket is not a typical SOCK_DGRAM characteristic, but
+ * SOCK_DGRAM is close enough. */
+ switch (sock->type) {
+ case SOCK_DGRAM:
+ case SOCK_SEQPACKET:
+ /* NOTE: After this line, caif_release() will be called for
+ * this socket if this caif_create fails. */
+ sock->ops = &caif_ops;
+ break;
+ default:
+ sk_free(sk);
+ return -ESOCKTNOSUPPORT;
+ }
+
+ /* Lock in order to try to stop someone from opening the socket
+ too early. The misc socket has its own lock. We cannot take our
+ lock until misc_register() is finished, because in open() the
+ locks are taken in this order (misc first and then cf_sk).
+ So anyone managing to open the device between the misc_register
+ and the mutex_lock will get a "device not found" error. Don't
+ think it can be avoided.
+ */
+ lock_sock(&(cf_sk->sk));
+
+ /* Initialize the nozero default sock structure data. */
+ sock_init_data(sock, sk);
+
+ sk->sk_destruct = caif_sock_destructor;
+
+ sk->sk_sndbuf = caif_sockbuf_size;
+ sk->sk_rcvbuf = caif_sockbuf_size;
+
+ cf_sk->pktq = cfpktq_create();
+ CAIFLOG_TRACE("pktq = %p \n", cf_sk->pktq);
+
+ if (!cf_sk->pktq) {
+ CAIFLOG_ERROR("caif_create: queue create failed.\n");
+ result = -ENOMEM;
+ release_sock(&cf_sk->sk);
+ goto err_failed;
+ }
+
+ cf_sk->layer.ctrlcmd = caif_sktflowctrl_cb;
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ SET_RX_FLOW_ON(cf_sk);
+
+ /* Increase the number of sockets created. */
+ atomic_inc(&caif_nr_socks);
+
+#ifdef CONFIG_DEBUG_FS
+ if (debugfsdir != NULL) {
+ cf_sk->debugfs_device_dir =
+ debugfs_create_dir(cf_sk->name, debugfsdir);
+ debugfs_create_u32("conn_state", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir, &cf_sk->conn_state);
+ debugfs_create_u32("flow_state", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir, &cf_sk->flow_state);
+ debugfs_create_u32("num_open", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_open);
+ debugfs_create_u32("num_close", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_close);
+ debugfs_create_u32("num_init", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_init);
+ debugfs_create_u32("num_init_resp", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_init_resp);
+ debugfs_create_u32("num_init_fail_resp", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_init_fail_resp);
+ debugfs_create_u32("num_deinit", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_deinit);
+ debugfs_create_u32("num_deinit_resp", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_deinit_resp);
+ debugfs_create_u32("num_remote_shutdown_ind",
+ S_IRUSR | S_IWUSR, cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_remote_shutdown_ind);
+ debugfs_create_u32("num_tx_flow_off_ind", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_tx_flow_off_ind);
+ debugfs_create_u32("num_tx_flow_on_ind", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_tx_flow_on_ind);
+ debugfs_create_u32("num_rx_flow_off", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_rx_flow_off);
+ debugfs_create_u32("num_rx_flow_on", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->num_rx_flow_on);
+ debugfs_create_u32("read_queue_len", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &cf_sk->read_queue_len);
+ debugfs_create_u32("max_caif_sockets", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_device_dir,
+ (u32 *) &max_caif_sockets);
+ }
+#endif
+ CAIFLOG_EXIT("");
+ release_sock(&cf_sk->sk);
+ return 0;
+err_failed:
+ sk_free(sk);
+ CAIFLOG_EXIT("");
+ return result;
+}
+
+
+static struct net_proto_family caif_family_ops = {
+ .family = PF_CAIF,
+ .create = caif_create,
+ .owner = THIS_MODULE,
+};
+
+int af_caif_init(void)
+{
+ int err;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+#ifdef CAIF_USE_CACHE
+ caif_sk_cachep = kmem_cache_create_compat("caifsock",
+ sizeof(struct caifsock) +
+ (sizeof(uint32_t) *
+ caif_max_links), 0,
+ SLAB_HWCACHE_ALIGN, NULL,
+ NULL);
+ if (!caif_sk_cachep) {
+ CAIFLOG_EXIT("");
+ return -ENOMEM;
+ }
+#endif
+ err = sock_register(&caif_family_ops);
+
+ if (err != 0) {
+#ifdef CAIF_USE_CACHE
+ kmem_cache_destroy(caif_sk_cachep);
+#endif
+ CAIFLOG_EXIT("");
+ return err;
+ }
+
+ return 0;
+}
+
+static int __init caif_sktinit_module(void)
+{
+ int stat;
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+ CAIFLOG_TRACE("\nCompiled:%s:%s\n", __DATE__, __TIME__);
+
+#ifdef CONFIG_DEBUG_FS
+ debugfsdir = debugfs_create_dir("chnl_skt", NULL);
+#endif
+
+ stat = af_caif_init();
+ if (stat) {
+ CAIFLOG_ERROR("Failed to initialize CAIF socket layer.");
+ return stat;
+ }
+ return 0;
+}
+
+static void __exit caif_sktexit_module(void)
+{
+ CAIFLOG_TRACE("Enter %s\n", __func__);
+
+ sock_unregister(PF_CAIF);
+
+ /* Destroy the CAIF socket cache. */
+#ifdef CAIF_USE_CACHE
+ kmem_cache_destroy(caif_sk_cachep);
+#endif
+
+#ifdef CONFIG_DEBUG_FS
+ if (debugfsdir != NULL)
+ debugfs_remove_recursive(debugfsdir);
+#endif
+
+ CAIFLOG_EXIT("");
+}
+
+module_init(caif_sktinit_module);
+module_exit(caif_sktexit_module);
+
diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c
new file mode 100644
index 0000000..fbc8a64
--- /dev/null
+++ b/net/caif/chnl_net.c
@@ -0,0 +1,655 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2009
+ * Author: Daniel Martensson / Daniel.Martensson@...ricsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/version.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/if_ether.h>
+#include <linux/moduleparam.h>
+#include <linux/ip.h>
+#include <linux/sched.h>
+#include <linux/sockios.h>
+
+/* CAIF header files. */
+#include <net/caif/generic/caif_layer.h>
+#include <net/caif/generic/cfcnfg.h>
+#include <net/caif/generic/cfpkt.h>
+#include <net/caif/caif_chr.h>
+#include <net/caif/caif_log.h>
+
+/*NetLink Header files*/
+#include <net/rtnetlink.h>
+#include <linux/caif/if_caif.h>
+
+#define CAIF_CONNECT_TIMEOUT 30
+#define SIZE_MTU 1500
+#define SIZE_MTU_MAX 4080
+#define SIZE_MTU_MIN 68
+
+static LIST_HEAD(chnl_net_list);
+static spinlock_t list_lock;
+
+MODULE_LICENSE("GPL");
+
+struct chnl_net {
+ struct layer chnl;
+ struct net_device_stats stats;
+ spinlock_t lock;
+ struct caif_channel_config config;
+ struct list_head list_field;
+ struct net_device *netdev;
+ char name[256];
+ wait_queue_head_t netmgmt_wq;
+ /* Flow status to remember and control the transmission. */
+ bool flowenabled;
+};
+
+
+static struct chnl_net *find_device(char *name, bool remove_from_list)
+{
+ struct list_head *list_node;
+ struct list_head *n;
+ struct chnl_net *dev = NULL;
+ struct chnl_net *tmp;
+ CAIFLOG_ENTER("");
+ spin_lock(&list_lock);
+ CAIFLOG_TRACE("[%s:%d] start looping \n", __func__,
+ __LINE__);
+ list_for_each_safe(list_node, n, &chnl_net_list) {
+ tmp =
+ list_entry(list_node, struct chnl_net, list_field);
+ /* Find from name. */
+ if (name) {
+ if (!strncmp(tmp->name, name, sizeof(tmp->name)))
+ dev = tmp;
+ } else
+ /* Get the first element if name is not specified. */
+ dev = tmp;
+ if (dev) {
+ CAIFLOG_TRACE("[%s:%d] match %s \n",
+ __func__, __LINE__, name);
+ if (remove_from_list)
+ list_del(list_node);
+ break;
+ }
+ }
+ spin_unlock(&list_lock);
+ return dev;
+}
+
+static int chnl_recv_cb(struct layer *layr, struct cfpkt *pkt)
+{
+ struct sk_buff *skb;
+ struct caif_packet_funcs f;
+ struct chnl_net *priv = NULL;
+ int pktlen;
+
+#ifdef CAIF_USE_SKB
+#else
+ int actual_len;
+#endif
+ int err = 0;
+
+ priv = container_of(layr, struct chnl_net, chnl);
+
+ if (!priv) {
+ CAIFLOG_TRACE("chnl_recv_cb: netdev container not found\n");
+ return -EINVAL;
+ }
+
+ /* Get CAIF packet functions. */
+ f = cfcnfg_get_packet_funcs();
+
+ /* Get length of CAIF packet. */
+ pktlen = f.cfpkt_getlen(pkt);
+
+#ifdef CAIF_USE_SKB
+ skb = (struct sk_buff *) f.cfpkt_tonative(pkt);
+#else
+ skb = dev_alloc_skb(pktlen);
+
+ if (!skb) {
+ CAIFLOG_TRACE("chnl_recv_cb: dev_alloc_skb failed.\n");
+ /* Update statistics. */
+ priv->netdev->stats.rx_dropped++;
+ err = -ENOMEM;
+ goto err_alloc_skb;
+ }
+
+ /* Extract data from the caif packet and copy it to the SKB. */
+ f.cfpkt_extract(pkt, skb_put(skb, pktlen), pktlen, &actual_len);
+#endif
+ /* Pass some minimum information and
+ * send the packet to the net stack.
+ */
+ skb->dev = priv->netdev;
+ skb->protocol = htons(ETH_P_IP);
+
+ if (priv->config.type == CAIF_CHTY_DATAGRAM_LOOP) {
+ /* We change the header, so the checksum is corrupted. */
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ } else {
+ skb->ip_summed = CHECKSUM_COMPLETE;
+ }
+
+ /* FIXME: Drivers should call this in tasklet context. */
+ if (in_interrupt())
+ netif_rx(skb);
+ else
+ netif_rx_ni(skb);
+
+ /* Update statistics. */
+ priv->netdev->stats.rx_packets++;
+ priv->netdev->stats.rx_bytes += pktlen;
+
+#ifdef CAIF_USE_SKB
+#else
+err_alloc_skb:
+ f.cfpkt_destroy(pkt);
+#endif
+ return err;
+}
+
+static void chnl_flowctrl_cb(struct layer *layr, enum caif_ctrlcmd flow,
+ int phyid)
+{
+ struct chnl_net *priv = NULL;
+ CAIFLOG_TRACE("NET flowctrl func called flow: %s.\n",
+ flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
+ flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" :
+ flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
+ flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" :
+ flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" :
+ flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ?
+ "REMOTE_SHUTDOWN" : "UKNOWN CTRL COMMAND");
+
+ priv = container_of(layr, struct chnl_net, chnl);
+
+ switch (flow) {
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+ case CAIF_CTRLCMD_DEINIT_RSP:
+ case CAIF_CTRLCMD_INIT_FAIL_RSP:
+ case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
+ priv->flowenabled = false;
+ netif_tx_disable(priv->netdev);
+ wake_up_interruptible(&priv->netmgmt_wq);
+ break;
+ case CAIF_CTRLCMD_FLOW_ON_IND:
+ case CAIF_CTRLCMD_INIT_RSP:
+ priv->flowenabled = true;
+ netif_wake_queue(priv->netdev);
+ wake_up_interruptible(&priv->netmgmt_wq);
+ break;
+ default:
+ break;
+ }
+}
+
+static int chnl_net_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct chnl_net *priv;
+ struct cfpkt *pkt = NULL;
+ int len;
+ struct caif_packet_funcs f;
+ int result = -1;
+
+ /* Get our private data. */
+ priv = (struct chnl_net *)netdev_priv(dev);
+ if (!priv) {
+ CAIFLOG_TRACE("chnl_write: priv not found\n");
+#ifndef CAIF_USE_SKB
+ goto err_cfpkt_create;
+#else
+ return -ENOSPC;
+#endif
+ }
+
+ if (skb->len > priv->netdev->mtu) {
+ CAIFLOG_TRACE("chnl_write ERR:"
+ " Size of skb packet exceeded size of set MTU\n");
+#ifndef CAIF_USE_SKB
+ goto err_cfpkt_create;
+#else
+ return -ENOSPC;
+#endif
+ }
+
+ if (!priv->flowenabled) {
+#ifndef CAIF_USE_SKB
+ dev_kfree_skb(skb);
+#endif
+ CAIFLOG_TRACE("Dropping packets Flow OFF\n");
+ return NETDEV_TX_BUSY;
+ }
+
+ if (priv->config.type == CAIF_CHTY_DATAGRAM_LOOP) {
+ struct iphdr *hdr;
+ __be32 swap;
+ /* Retrieve IP header. */
+ hdr = ip_hdr(skb);
+ /* Change source and destination address. */
+ swap = hdr->saddr;
+ hdr->saddr = hdr->daddr;
+ hdr->daddr = swap;
+ }
+ /* Store original SKB length. */
+ len = skb->len;
+
+ /* Get CAIF packet functions. */
+ f = cfcnfg_get_packet_funcs();
+
+#ifdef CAIF_USE_SKB
+ pkt = f.cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
+#else
+ /* Create a CAIF packet based on the SKB. */
+ pkt = f.cfpkt_create_xmit_pkt(skb->data, skb->len);
+ if (!pkt) {
+ CAIFLOG_TRACE("chnl_write: cfpkt_create failed.\n");
+ goto err_cfpkt_create;
+ }
+#endif
+
+ /* Send the packet down the stack. */
+ result = priv->chnl.dn->transmit(priv->chnl.dn, NULL, pkt);
+ if (result) {
+ if (result == CFGLU_ERETRY)
+ result = NETDEV_TX_BUSY;
+
+#ifndef CAIF_USE_SKB
+ f.cfpkt_destroy(pkt);
+#endif
+ return result;
+ }
+
+ /* Update statistics. */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += len;
+
+#ifndef CAIF_USE_SKB
+ dev_kfree_skb(skb);
+#endif
+ return NETDEV_TX_OK;
+
+#ifndef CAIF_USE_SKB
+err_cfpkt_create:
+ dev_kfree_skb(skb);
+ return -ENOSPC;
+#endif
+}
+
+
+static int chnl_net_open(struct net_device *dev)
+{
+ struct chnl_net *priv = NULL;
+ int result = -1;
+
+ CAIFLOG_ENTER("chnl_net_open:\n");
+ priv = (struct chnl_net *)netdev_priv(dev);
+ CAIFLOG_TRACE("chnl_net_open dev name: %s\n", priv->name);
+
+ if (!priv) {
+ CAIFLOG_TRACE("chnl_net_open: no priv\n");
+ return -ENODEV;
+ }
+ result = caifdev_adapt_register(&priv->config, &priv->chnl);
+ if (result != 0) {
+ CAIFLOG_TRACE("chnl_net_open: err: "
+ "Unable to register and open device, Err:%d\n",
+ result);
+ return -ENODEV;
+ }
+ result = wait_event_interruptible(priv->netmgmt_wq, priv->flowenabled);
+
+ if (result == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("chnl_net_open: "
+ "wait_event_interruptible woken by a signal\n");
+ return -ERESTARTSYS;
+ } else
+ CAIFLOG_TRACE("chnl_net_open: Flow on recieved\n");
+
+
+ CAIFLOG_EXIT("chnl_net_open:\n");
+ return 0;
+}
+
+static int chnl_net_stop(struct net_device *dev)
+{
+ struct chnl_net *priv;
+ int result = -1;
+ CAIFLOG_ENTER("chnl_net_stop:\n");
+ CAIFLOG_TRACE("chnl_net_stop: %s \n", dev->name);
+ priv = (struct chnl_net *)netdev_priv(dev);
+
+ result = caifdev_adapt_unregister(&priv->chnl);
+ if (result != 0) {
+ CAIFLOG_TRACE("chnl_net_stop: err: "
+ "Unable to STOP device, Err:%d\n", result);
+ return -EBUSY;
+ }
+ result = wait_event_interruptible(priv->netmgmt_wq,
+ !priv->flowenabled);
+
+ if (result == -ERESTARTSYS) {
+ CAIFLOG_TRACE
+ ("chnl_net_stop: "
+ "wait_event_interruptible woken by signal,"
+ " signal_pending(current) = %d\n",
+ signal_pending(current));
+ } else {
+ CAIFLOG_TRACE("[%s:%d] chnl_net_stop: DISCONNECT RECEIVED\n",
+ __func__, __LINE__);
+ }
+
+ CAIFLOG_EXIT("chnl_net_stop:\n");
+ return 0;
+}
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
+static const struct net_device_ops netdev_ops = {
+ .ndo_open = chnl_net_open,
+ .ndo_stop = chnl_net_stop,
+ .ndo_start_xmit = chnl_net_hard_start_xmit,
+};
+#endif
+
+static void chnl_net_init(struct net_device *dev)
+{
+ struct chnl_net *priv;
+
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 28))
+ CAIFLOG_ENTER("chnl_net_init:\n");
+ dev->open = chnl_net_open;
+ dev->stop = chnl_net_stop;
+ dev->hard_start_xmit = chnl_net_hard_start_xmit;
+#else
+
+ CAIFLOG_ENTER("chnl_net_init:\n");
+ dev->netdev_ops = &netdev_ops;
+#endif
+ dev->flags |= IFF_NOARP;
+ dev->needed_headroom = CAIF_NEEDED_HEADROOM;
+ dev->needed_tailroom = CAIF_NEEDED_TAILROOM;
+ dev->mtu = SIZE_MTU;
+
+ priv = (struct chnl_net *)netdev_priv(dev);
+ priv->chnl.receive = chnl_recv_cb;
+ priv->chnl.ctrlcmd = chnl_flowctrl_cb;
+ priv->netdev = dev;
+
+ strncpy(priv->config.name, dev->name, sizeof(priv->config.name));
+ priv->config.type = CAIF_CHTY_DATAGRAM;
+ priv->config.phy_pref = CFPHYPREF_HIGH_BW;
+ priv->config.priority = CAIF_PRIO_LOW;
+ priv->config.u.dgm.connection_id = -1; /* Insert illegal value */
+
+ priv->flowenabled = false;
+ init_waitqueue_head(&priv->netmgmt_wq);
+ strncpy(priv->name, dev->name, sizeof(priv->name));
+ netif_tx_disable(priv->netdev);
+
+ spin_lock_init(&priv->lock);
+ spin_lock(&list_lock);
+ list_add(&priv->list_field, &chnl_net_list);
+ spin_unlock(&list_lock);
+
+ CAIFLOG_EXIT("chnl_net_init:\n");
+}
+
+static int netdev_create(struct caif_channel_create_action *action)
+{
+ struct chnl_net *priv;
+ int result = -1;
+ struct net_device *netdevptr;
+
+ netdevptr = alloc_netdev(sizeof(struct chnl_net),
+ action->name.name, chnl_net_init);
+
+ if (!netdevptr) {
+ CAIFLOG_TRACE("chnl: can't allocate netdev.\n");
+ return -ENODEV;
+ }
+
+ priv = (struct chnl_net *)netdev_priv(netdevptr);
+ priv->config = action->config;
+
+ result = register_netdev(priv->netdev);
+ if (result < 0) {
+ CAIFLOG_TRACE("chnl: err: %d, can't register netdev.\n",
+ result);
+ free_netdev(priv->netdev);
+ return -ENODEV;
+ }
+ CAIFLOG_TRACE("netdev_create: Created channel: %s\n", priv->name);
+ /* Add the device to the list */
+ return 0;
+}
+
+static int delete_device(struct chnl_net *dev)
+{
+ CAIFLOG_TRACE("delete_device: Removing Device: %s\n", dev->name);
+ if (dev->netdev) {
+ unregister_netdev(dev->netdev);
+ free_netdev(dev->netdev);
+ }
+ return 0;
+}
+
+static int netdev_remove(char *name)
+{
+ struct chnl_net *dev = NULL;
+ /* Find device from name. */
+ dev = find_device(name, true);
+ if (!dev)
+ return -EBADF;
+ else
+ if (delete_device(dev) != 0)
+ return -EBUSY;
+ return 0;
+}
+
+static int netdev_mgmt(int action, union caif_action *param)
+{
+ switch (action) {
+ case CAIF_ACT_CREATE_DEVICE:
+ return netdev_create(¶m->create_channel);
+ case CAIF_ACT_DELETE_DEVICE:
+ return netdev_remove(param->delete_channel.name);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct chnl_net *priv;
+ u8 loop;
+ priv = (struct chnl_net *)netdev_priv(dev);
+ NLA_PUT_U32(skb, IFLA_CAIF_IPV4_CONNID,
+ priv->config.u.dgm.connection_id);
+ NLA_PUT_U32(skb, IFLA_CAIF_IPV6_CONNID,
+ priv->config.u.dgm.connection_id);
+ loop = priv->config.type == CAIF_CHTY_DATAGRAM_LOOP;
+ NLA_PUT_U8(skb, IFLA_CAIF_LOOPBACK, loop);
+
+
+ return 0;
+nla_put_failure:
+ return -EMSGSIZE;
+
+}
+
+static void caif_netlink_parms(struct nlattr *data[],
+ struct caif_channel_config *parms)
+{
+ if (!data) {
+ caif_assert("caif_netlink_parms():No params data found\n");
+ return;
+ }
+ if (data[IFLA_CAIF_IPV4_CONNID])
+ parms->u.dgm.connection_id =
+ nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]);
+ if (data[IFLA_CAIF_IPV6_CONNID])
+ parms->u.dgm.connection_id =
+ nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]);
+ if (data[IFLA_CAIF_LOOPBACK]) {
+ if (nla_get_u8(data[IFLA_CAIF_LOOPBACK]))
+ parms->type = CAIF_CHTY_DATAGRAM_LOOP;
+ else
+ parms->type = CAIF_CHTY_DATAGRAM;
+ }
+}
+
+static int ipcaif_newlink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ int err;
+ struct chnl_net *caifdev;
+ caifdev = netdev_priv(dev);
+ caif_netlink_parms(data, &caifdev->config);
+ err = register_netdevice(dev);
+ if (err) {
+ caif_assert("ipcaif_newlink(): Device Reg. failed\n");
+ goto out;
+ }
+ dev_hold(dev);
+out:
+ return err;
+}
+
+static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct chnl_net *caifdev;
+ caifdev = netdev_priv(dev);
+ caif_netlink_parms(data, &caifdev->config);
+ netdev_state_change(dev);
+ return 0;
+}
+
+static void ipcaif_dellink(struct net_device *dev)
+{
+ unregister_netdevice(dev);
+ dev_put(dev);
+}
+
+static size_t ipcaif_get_size(const struct net_device *dev)
+{
+ return
+ /* IFLA_CAIF_IPV4_CONNID */
+ nla_total_size(4) +
+ /* IFLA_CAIF_IPV6_CONNID */
+ nla_total_size(4) +
+ /* IFLA_CAIF_LOOPBACK */
+ nla_total_size(2) +
+ 0;
+}
+
+static const struct nla_policy caif_policy[IFLA_CAIF_MAX + 1] = {
+ [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 },
+ [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 },
+ [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 }
+};
+
+
+static struct rtnl_link_ops ipcaif_link_ops __read_mostly = {
+ .kind = "caif",
+ .priv_size = (size_t)sizeof(struct chnl_net),
+ .setup = chnl_net_init,
+ .maxtype = IFLA_CAIF_MAX,
+ .policy = caif_policy,
+ .newlink = ipcaif_newlink,
+ .changelink = ipcaif_changelink,
+ .dellink = ipcaif_dellink,
+ .get_size = ipcaif_get_size,
+ .fill_info = ipcaif_fill_info,
+
+};
+
+int chnl_net_ioctl(unsigned int cmd, unsigned long arg)
+{
+ struct chnl_net *priv;
+ int result = -1;
+ struct net_device *netdevptr;
+ int ret;
+ struct ifreq ifreq;
+ struct ifcaif_param param;
+ printk(KERN_INFO "Enter %s %d\n", __func__, cmd);
+
+ if (copy_from_user(&ifreq, (const void *)arg, sizeof(ifreq)))
+ return -EFAULT;
+
+ if (cmd != SIOCCAIFNETNEW)
+ return -ENOIOCTLCMD;
+
+ if (ifreq.ifr_ifru.ifru_data != NULL) {
+ ret = copy_from_user(¶m,
+ ifreq.ifr_ifru.ifru_data,
+ sizeof(param));
+ if (ret)
+ return -EFAULT;
+ ifreq.ifr_ifru.ifru_data = ¶m;
+ }
+
+
+ CAIFLOG_TRACE("Allocte netdev: %s\n", ifreq.ifr_name);
+ netdevptr = alloc_netdev(sizeof(struct chnl_net),
+ ifreq.ifr_name, chnl_net_init);
+
+ if (!netdevptr)
+ return -ENODEV;
+
+ priv = (struct chnl_net *)netdev_priv(netdevptr);
+
+ priv->config.u.dgm.connection_id = param.ipv4_connid;
+ if (param.loop)
+ priv->config.type = CAIF_CHTY_DATAGRAM_LOOP;
+ else
+ priv->config.type = CAIF_CHTY_DATAGRAM;
+
+ result = register_netdev(priv->netdev);
+
+ if (result < 0) {
+ CAIFLOG_TRACE("chnl: err: %d, can't register netdev.\n",
+ result);
+ free_netdev(priv->netdev);
+ return -ENODEV;
+ }
+ CAIFLOG_TRACE("Created channel: %s\n", priv->name);
+ /* Add the device to the list */
+ return 0;
+
+};
+
+int chnl_init_module(void)
+{
+ int err = -1;
+ caif_register_netdev(netdev_mgmt);
+ caif_register_ioctl(chnl_net_ioctl);
+ err = rtnl_link_register(&ipcaif_link_ops);
+ if (err < 0) {
+ CAIFLOG_ENTER("chnl_init_module: rtnl_link_register failed\n");
+ rtnl_link_unregister(&ipcaif_link_ops);
+ return err;
+ }
+ return 0;
+}
+
+void chnl_exit_module(void)
+{
+ struct chnl_net *dev = NULL;
+
+ /* Find_device with NULL removes the first
+ * element from the list and updates the list.
+ */
+ while ((dev = find_device(NULL, true)) != NULL)
+ delete_device(dev);
+ caif_unregister_netdev();
+}
+
+module_init(chnl_init_module);
+module_exit(chnl_exit_module);
--
1.6.2.2.1669.g7eaf8
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