@@ -4545,7 +4545,7 @@ int netdev_class_create_file_ns(const struct class_attribute *class_attr,
const void *ns);
void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
const void *ns);
-
+bool netdev_class_has_file_ns(const char *name, const void *ns);
static inline int netdev_class_create_file(const struct class_attribute *class_attr)
{
return netdev_class_create_file_ns(class_attr, NULL);
@@ -1781,6 +1781,19 @@ void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
}
EXPORT_SYMBOL(netdev_class_remove_file_ns);
+bool netdev_class_has_file_ns(const char *name, const void *ns)
+{
+ struct kernfs_node *kn;
+
+ kn = class_find_and_get_file_ns(&net_class, name, ns);
+ if (kn) {
+ kernfs_put(kn);
+ return true;
+ }
+ return false;
+}
+EXPORT_SYMBOL(netdev_class_has_file_ns);
+
int __init netdev_kobject_init(void)
{
kobj_ns_type_register(&net_ns_type_operations);
This helper function is to check whether the class file "/sys/class/net*" is existing or not. In the next patch, this helper function will be used. Reported-by: syzbot+830c6dbfc71edc4f0b8f@syzkaller.appspotmail.com Fixes: b76cdba9cdb2 ("[PATCH] bonding: add sysfs functionality to bonding (large)") Signed-off-by: Taehee Yoo <ap420073@gmail.com> --- include/linux/netdevice.h | 2 +- net/core/net-sysfs.c | 13 +++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-)