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caif: prepare support for namespaces

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Use struct net to reference CAIF configuration object instead of static variables.
Refactor functions caif_connect_client, caif_disconnect_client and squach
files cfcnfg.c and caif_config_utils.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
sjur.brandeland@stericsson.com 2011-05-13 02:44:05 +00:00 • committed by David S. Miller
parent b3ccfbe409
commit bee925db9a
8 changed files with 176 additions and 261 deletions
Download patch file Download diff file Expand all files Collapse all files

77
net/caif/caif_dev.c
View file

@ -21,7 +21,6 @@
#include <net/net_namespace.h>
#include <net/pkt_sched.h>
#include <net/caif/caif_device.h>
#include <net/caif/caif_dev.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfpkt.h>
#include <net/caif/cfcnfg.h>
@ -43,11 +42,21 @@ struct caif_device_entry_list {
};
struct caif_net {
struct cfcnfg *cfg;
struct caif_device_entry_list caifdevs;
};
static int caif_net_id;
static struct cfcnfg *cfg;
struct cfcnfg *get_cfcnfg(struct net *net)
{
struct caif_net *caifn;
BUG_ON(!net);
caifn = net_generic(net, caif_net_id);
BUG_ON(!caifn);
return caifn->cfg;
}
EXPORT_SYMBOL(get_cfcnfg);
static struct caif_device_entry_list *caif_device_list(struct net *net)
{
@ -191,12 +200,17 @@ static int caif_device_notify(struct notifier_block *me, unsigned long what,
struct caif_dev_common *caifdev;
enum cfcnfg_phy_preference pref;
enum cfcnfg_phy_type phy_type;
struct cfcnfg *cfg;
struct caif_device_entry_list *caifdevs =
caif_device_list(dev_net(dev));
if (dev->type != ARPHRD_CAIF)
return 0;
cfg = get_cfcnfg(dev_net(dev));
if (cfg == NULL)
return 0;
switch (what) {
case NETDEV_REGISTER:
caifd = caif_device_alloc(dev);
@ -235,7 +249,6 @@ static int caif_device_notify(struct notifier_block *me, unsigned long what,
phy_type,
dev,
&caifd->layer,
0,
pref,
caifdev->use_fcs,
caifdev->use_stx);
@ -323,35 +336,20 @@ static struct notifier_block caif_device_notifier = {
.priority = 0,
};
int caif_connect_client(struct caif_connect_request *conn_req,
struct cflayer *client_layer, int *ifindex,
int *headroom, int *tailroom)
{
struct cfctrl_link_param param;
int ret;
ret = caif_connect_req_to_link_param(cfg, conn_req, &param);
if (ret)
return ret;
/* Hook up the adaptation layer. */
return cfcnfg_add_adaptation_layer(cfg, &param,
client_layer, ifindex,
headroom, tailroom);
}
EXPORT_SYMBOL(caif_connect_client);
int caif_disconnect_client(struct cflayer *adap_layer)
{
return cfcnfg_disconn_adapt_layer(cfg, adap_layer);
}
EXPORT_SYMBOL(caif_disconnect_client);
/* Per-namespace Caif devices handling */
static int caif_init_net(struct net *net)
{
struct caif_net *caifn = net_generic(net, caif_net_id);
BUG_ON(!caifn);
INIT_LIST_HEAD(&caifn->caifdevs.list);
mutex_init(&caifn->caifdevs.lock);
caifn->cfg = cfcnfg_create();
if (!caifn->cfg) {
pr_warn("can't create cfcnfg\n");
return -ENOMEM;
}
return 0;
}
@ -360,10 +358,17 @@ static void caif_exit_net(struct net *net)
struct caif_device_entry *caifd, *tmp;
struct caif_device_entry_list *caifdevs =
caif_device_list(net);
struct cfcnfg *cfg;
rtnl_lock();
mutex_lock(&caifdevs->lock);
cfg = get_cfcnfg(net);
if (cfg == NULL) {
mutex_unlock(&caifdevs->lock);
return;
}
list_for_each_entry_safe(caifd, tmp, &caifdevs->list, list) {
int i = 0;
list_del_rcu(&caifd->list);
@ -382,7 +387,7 @@ static void caif_exit_net(struct net *net)
free_percpu(caifd->pcpu_refcnt);
kfree(caifd);
}
cfcnfg_remove(cfg);
mutex_unlock(&caifdevs->lock);
rtnl_unlock();
@ -400,32 +405,22 @@ static int __init caif_device_init(void)
{
int result;
cfg = cfcnfg_create();
if (!cfg) {
pr_warn("can't create cfcnfg\n");
goto err_cfcnfg_create_failed;
}
result = register_pernet_device(&caif_net_ops);
if (result) {
kfree(cfg);
cfg = NULL;
if (result)
return result;
}
dev_add_pack(&caif_packet_type);
register_netdevice_notifier(&caif_device_notifier);
dev_add_pack(&caif_packet_type);
return result;
err_cfcnfg_create_failed:
return -ENODEV;
}
static void __exit caif_device_exit(void)
{
dev_remove_pack(&caif_packet_type);
unregister_pernet_device(&caif_net_ops);
unregister_netdevice_notifier(&caif_device_notifier);
cfcnfg_remove(cfg);
dev_remove_pack(&caif_packet_type);
}
module_init(caif_device_init);