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Date: Sat, 6 May 2017 10:07:29 -0600
From: David Ahern <dsahern@...il.com>
To: netdev@...r.kernel.org
Cc: roopa@...ulusnetworks.com, f.fainelli@...il.com,
nicolas.dichtel@...nd.com, David Ahern <dsahern@...il.com>
Subject: [PATCH RFC net-next 1/6] net: Add accessor for kboject in a net_device
Signed-off-by: David Ahern <dsahern@...il.com>
---
include/linux/netdevice.h | 5 +++++
net/batman-adv/sysfs.c | 13 +++++++++--
net/bridge/br_if.c | 12 ++++++----
net/bridge/br_sysfs_br.c | 17 +++++++++-----
net/bridge/br_sysfs_if.c | 8 +++++--
net/core/dev.c | 57 ++++++++++++++++++++++++++++++++++-------------
net/core/net-sysfs.c | 11 +++++----
net/wireless/core.c | 15 +++++++++----
8 files changed, 100 insertions(+), 38 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 9c23bd2efb56..305d2d42b349 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4272,6 +4272,11 @@ static inline const char *netdev_reg_state(const struct net_device *dev)
return " (unknown)";
}
+static inline struct kobject *netdev_kobject(struct net_device *dev)
+{
+ return &dev->dev.kobj;
+}
+
__printf(3, 4)
void netdev_printk(const char *level, const struct net_device *dev,
const char *format, ...);
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index 0ae8b30e4eaa..a8a7294fc054 100644
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -735,11 +735,14 @@ static struct batadv_attribute *batadv_vlan_attrs[] = {
int batadv_sysfs_add_meshif(struct net_device *dev)
{
- struct kobject *batif_kobject = &dev->dev.kobj;
+ struct kobject *batif_kobject = netdev_kobject(dev);
struct batadv_priv *bat_priv = netdev_priv(dev);
struct batadv_attribute **bat_attr;
int err;
+ if (!batif_kobject)
+ return 0;
+
bat_priv->mesh_obj = kobject_create_and_add(BATADV_SYSFS_IF_MESH_SUBDIR,
batif_kobject);
if (!bat_priv->mesh_obj) {
@@ -778,6 +781,9 @@ void batadv_sysfs_del_meshif(struct net_device *dev)
struct batadv_priv *bat_priv = netdev_priv(dev);
struct batadv_attribute **bat_attr;
+ if (!bat_priv->mesh_obj)
+ return;
+
for (bat_attr = batadv_mesh_attrs; *bat_attr; ++bat_attr)
sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
@@ -1132,10 +1138,13 @@ static struct batadv_attribute *batadv_batman_attrs[] = {
int batadv_sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
{
- struct kobject *hardif_kobject = &dev->dev.kobj;
+ struct kobject *hardif_kobject = netdev_kobject(dev);
struct batadv_attribute **bat_attr;
int err;
+ if (!hardif_kobject)
+ return 0;
+
*hardif_obj = kobject_create_and_add(BATADV_SYSFS_IF_BAT_SUBDIR,
hardif_kobject);
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 7f8d05cf9065..a5354436ada8 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -485,6 +485,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
struct net_bridge_port *p;
int err = 0;
unsigned br_hr, dev_hr;
+ struct kobject *kobj;
bool changed_addr;
/* Don't allow bridging non-ethernet like devices, or DSA-enabled
@@ -521,10 +522,13 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
if (err)
goto put_back;
- err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
- SYSFS_BRIDGE_PORT_ATTR);
- if (err)
- goto err1;
+ kobj = netdev_kobject(dev);
+ if (kobj) {
+ err = kobject_init_and_add(&p->kobj, &brport_ktype, kobj,
+ SYSFS_BRIDGE_PORT_ATTR);
+ if (err)
+ goto err1;
+ }
err = br_sysfs_addif(p);
if (err)
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index 0b5dd607444c..f6439664ffea 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -917,10 +917,13 @@ static struct bin_attribute bridge_forward = {
*/
int br_sysfs_addbr(struct net_device *dev)
{
- struct kobject *brobj = &dev->dev.kobj;
+ struct kobject *brobj = netdev_kobject(dev);
struct net_bridge *br = netdev_priv(dev);
int err;
+ if (!brobj)
+ return 0;
+
err = sysfs_create_group(brobj, &bridge_group);
if (err) {
pr_info("%s: can't create group %s/%s\n",
@@ -944,9 +947,9 @@ int br_sysfs_addbr(struct net_device *dev)
}
return 0;
out3:
- sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
+ sysfs_remove_bin_file(brobj, &bridge_forward);
out2:
- sysfs_remove_group(&dev->dev.kobj, &bridge_group);
+ sysfs_remove_group(brobj, &bridge_group);
out1:
return err;
@@ -954,10 +957,12 @@ int br_sysfs_addbr(struct net_device *dev)
void br_sysfs_delbr(struct net_device *dev)
{
- struct kobject *kobj = &dev->dev.kobj;
+ struct kobject *kobj = netdev_kobject(dev);
struct net_bridge *br = netdev_priv(dev);
kobject_put(br->ifobj);
- sysfs_remove_bin_file(kobj, &bridge_forward);
- sysfs_remove_group(kobj, &bridge_group);
+ if (kobj) {
+ sysfs_remove_bin_file(kobj, &bridge_forward);
+ sysfs_remove_group(kobj, &bridge_group);
+ }
}
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 5d5d413a6cf8..4256e78f6c9f 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -283,10 +283,14 @@ int br_sysfs_addif(struct net_bridge_port *p)
{
struct net_bridge *br = p->br;
const struct brport_attribute **a;
+ struct kobject *br_kobj;
int err;
- err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
- SYSFS_BRIDGE_PORT_LINK);
+ br_kobj = netdev_kobject(br->dev);
+ if (!br_kobj)
+ return 0;
+
+ err = sysfs_create_link(&p->kobj, br_kobj, SYSFS_BRIDGE_PORT_LINK);
if (err)
return err;
diff --git a/net/core/dev.c b/net/core/dev.c
index d07aa5ffb511..f166b3bf1895 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5910,22 +5910,33 @@ static int netdev_adjacent_sysfs_add(struct net_device *dev,
struct net_device *adj_dev,
struct list_head *dev_list)
{
+ struct kobject *dev_kobj, *adj_kobj;
char linkname[IFNAMSIZ+7];
+ int rc = 0;
- sprintf(linkname, dev_list == &dev->adj_list.upper ?
- "upper_%s" : "lower_%s", adj_dev->name);
- return sysfs_create_link(&(dev->dev.kobj), &(adj_dev->dev.kobj),
- linkname);
+ dev_kobj = netdev_kobject(dev);
+ adj_kobj = netdev_kobject(adj_dev);
+
+ if (dev_kobj && adj_kobj) {
+ sprintf(linkname, dev_list == &dev->adj_list.upper ?
+ "upper_%s" : "lower_%s", adj_dev->name);
+ rc = sysfs_create_link(dev_kobj, adj_kobj, linkname);
+ }
+ return rc;
}
+
static void netdev_adjacent_sysfs_del(struct net_device *dev,
char *name,
struct list_head *dev_list)
{
+ struct kobject *kobj = netdev_kobject(dev);
char linkname[IFNAMSIZ+7];
- sprintf(linkname, dev_list == &dev->adj_list.upper ?
- "upper_%s" : "lower_%s", name);
- sysfs_remove_link(&(dev->dev.kobj), linkname);
+ if (kobj) {
+ sprintf(linkname, dev_list == &dev->adj_list.upper ?
+ "upper_%s" : "lower_%s", name);
+ sysfs_remove_link(kobj, linkname);
+ }
}
static inline bool netdev_adjacent_is_neigh_list(struct net_device *dev,
@@ -5976,11 +5987,14 @@ static int __netdev_adjacent_dev_insert(struct net_device *dev,
/* Ensure that master link is always the first item in list. */
if (master) {
- ret = sysfs_create_link(&(dev->dev.kobj),
- &(adj_dev->dev.kobj), "master");
- if (ret)
- goto remove_symlinks;
+ struct kobject *dev_kobj = netdev_kobject(dev);
+ struct kobject *adj_kobj = netdev_kobject(adj_dev);
+ if (dev_kobj && adj_kobj) {
+ ret = sysfs_create_link(dev_kobj, adj_kobj, "master");
+ if (ret)
+ goto remove_symlinks;
+ }
list_add_rcu(&adj->list, dev_list);
} else {
list_add_tail_rcu(&adj->list, dev_list);
@@ -6025,8 +6039,12 @@ static void __netdev_adjacent_dev_remove(struct net_device *dev,
return;
}
- if (adj->master)
- sysfs_remove_link(&(dev->dev.kobj), "master");
+ if (adj->master) {
+ struct kobject *kobj = netdev_kobject(dev);
+
+ if (kobj)
+ sysfs_remove_link(kobj, "master");
+ }
if (netdev_adjacent_is_neigh_list(dev, adj_dev, dev_list))
netdev_adjacent_sysfs_del(dev, adj_dev->name, dev_list);
@@ -7665,6 +7683,7 @@ void netdev_run_todo(void)
rcu_barrier();
while (!list_empty(&list)) {
+ struct kobject *kobj;
struct net_device *dev
= list_first_entry(&list, struct net_device, todo_list);
list_del(&dev->todo_list);
@@ -7702,7 +7721,9 @@ void netdev_run_todo(void)
wake_up(&netdev_unregistering_wq);
/* Free network device */
- kobject_put(&dev->dev.kobj);
+ kobj = netdev_kobject(dev);
+ if (kobj)
+ kobject_put(kobj);
}
}
@@ -8071,6 +8092,7 @@ EXPORT_SYMBOL(unregister_netdev);
int dev_change_net_namespace(struct net_device *dev, struct net *net, const char *pat)
{
+ struct kobject *kobj;
int err;
ASSERT_RTNL();
@@ -8136,7 +8158,9 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
dev_mc_flush(dev);
/* Send a netdev-removed uevent to the old namespace */
- kobject_uevent(&dev->dev.kobj, KOBJ_REMOVE);
+ kobj = netdev_kobject(dev);
+ if (kobj)
+ kobject_uevent(kobj, KOBJ_REMOVE);
netdev_adjacent_del_links(dev);
/* Actually switch the network namespace */
@@ -8147,7 +8171,8 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
dev->ifindex = dev_new_index(net);
/* Send a netdev-add uevent to the new namespace */
- kobject_uevent(&dev->dev.kobj, KOBJ_ADD);
+ if (kobj)
+ kobject_uevent(kobj, KOBJ_ADD);
netdev_adjacent_add_links(dev);
/* Fixup kobjects */
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 65ea0ff4017c..9df53b688f5b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1390,10 +1390,13 @@ static int register_queue_kobjects(struct net_device *dev)
int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
#ifdef CONFIG_SYSFS
- dev->queues_kset = kset_create_and_add("queues",
- NULL, &dev->dev.kobj);
- if (!dev->queues_kset)
- return -ENOMEM;
+ struct kobject *kobj = netdev_kobject(dev);
+
+ if (kobj) {
+ dev->queues_kset = kset_create_and_add("queues", NULL, kobj);
+ if (!dev->queues_kset)
+ return -ENOMEM;
+ }
real_rx = dev->real_num_rx_queues;
#endif
real_tx = dev->real_num_tx_queues;
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 83ea164f16b3..a73b3efc17b2 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -1122,6 +1122,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev;
struct cfg80211_sched_scan_request *pos, *tmp;
+ struct kobject *kobj;
if (!wdev)
return NOTIFY_DONE;
@@ -1160,9 +1161,12 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
/* can only change netns with wiphy */
dev->features |= NETIF_F_NETNS_LOCAL;
- if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
- "phy80211")) {
- pr_err("failed to add phy80211 symlink to netdev!\n");
+ kobj = netdev_kobject(dev);
+ if (kobj) {
+ if (sysfs_create_link(kobj, &rdev->wiphy.dev.kobj,
+ "phy80211")) {
+ pr_err("failed to add phy80211 symlink to netdev!\n");
+ }
}
wdev->netdev = dev;
#ifdef CONFIG_CFG80211_WEXT
@@ -1264,9 +1268,12 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
* remove and clean it up.
*/
if (!list_empty(&wdev->list)) {
+ struct kobject *kobj = netdev_kobject(dev);
+
nl80211_notify_iface(rdev, wdev,
NL80211_CMD_DEL_INTERFACE);
- sysfs_remove_link(&dev->dev.kobj, "phy80211");
+ if (kobj)
+ sysfs_remove_link(kobj, "phy80211");
list_del_rcu(&wdev->list);
rdev->devlist_generation++;
cfg80211_mlme_purge_registrations(wdev);
--
2.11.0 (Apple Git-81)
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