From f3ada640c25f2d57beef79b7b98619748be3f3ca Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sun, 9 Nov 2014 08:36:48 +0100 Subject: [PATCH] ieee802154: add cfg802154_registered_device list This patch adds a new cfg802154_rdev_list to remember all registered cfg802154_registered_device structs. This is needed to prepare the upcomming nl802154 framework. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- net/ieee802154/core.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- net/ieee802154/core.h | 1 + 2 files changed, 45 insertions(+), 1 deletion(-) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index a3aa23f..11a1d2e 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -18,11 +18,16 @@ #include #include +#include #include "ieee802154.h" #include "sysfs.h" #include "core.h" +/* RCU-protected (and RTNL for writers) */ +static LIST_HEAD(cfg802154_rdev_list); +static int cfg802154_rdev_list_generation; + static int wpan_phy_match(struct device *dev, const void *data) { return !strcmp(dev_name(dev), (const char *)data); @@ -109,13 +114,51 @@ EXPORT_SYMBOL(wpan_phy_new); int wpan_phy_register(struct wpan_phy *phy) { - return device_add(&phy->dev); + struct cfg802154_registered_device *rdev = wpan_phy_to_rdev(phy); + int ret; + + rtnl_lock(); + ret = device_add(&phy->dev); + if (ret) { + rtnl_unlock(); + return ret; + } + + list_add_rcu(&rdev->list, &cfg802154_rdev_list); + cfg802154_rdev_list_generation++; + + /* TODO phy registered lock */ + rtnl_unlock(); + + /* TODO nl802154 phy notify */ + + return 0; } EXPORT_SYMBOL(wpan_phy_register); void wpan_phy_unregister(struct wpan_phy *phy) { + struct cfg802154_registered_device *rdev = wpan_phy_to_rdev(phy); + + /* TODO open count */ + + rtnl_lock(); + /* TODO nl802154 phy notify */ + /* TODO phy registered lock */ + + /* TODO WARN_ON wpan_dev_list */ + + /* First remove the hardware from everywhere, this makes + * it impossible to find from userspace. + */ + list_del_rcu(&rdev->list); + synchronize_rcu(); + + cfg802154_rdev_list_generation++; + device_del(&phy->dev); + + rtnl_unlock(); } EXPORT_SYMBOL(wpan_phy_unregister); diff --git a/net/ieee802154/core.h b/net/ieee802154/core.h index fea60b3..38887cb2 100644 --- a/net/ieee802154/core.h +++ b/net/ieee802154/core.h @@ -5,6 +5,7 @@ struct cfg802154_registered_device { const struct cfg802154_ops *ops; + struct list_head list; /* wpan_phy index, internal only */ int wpan_phy_idx; -- 2.7.4