diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/kobject.c | 43 |
1 files changed, 33 insertions, 10 deletions
diff --git a/lib/kobject.c b/lib/kobject.c index 5b4b8886435e..064451f2a6c3 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -18,6 +18,7 @@ #include <linux/export.h> #include <linux/stat.h> #include <linux/slab.h> +#include <linux/random.h> /** * kobject_namespace - return @kobj's namespace tag @@ -65,13 +66,17 @@ static int populate_dir(struct kobject *kobj) static int create_dir(struct kobject *kobj) { + const struct kobj_ns_type_operations *ops; int error; error = sysfs_create_dir_ns(kobj, kobject_namespace(kobj)); - if (!error) { - error = populate_dir(kobj); - if (error) - sysfs_remove_dir(kobj); + if (error) + return error; + + error = populate_dir(kobj); + if (error) { + sysfs_remove_dir(kobj); + return error; } /* @@ -80,7 +85,20 @@ static int create_dir(struct kobject *kobj) */ sysfs_get(kobj->sd); - return error; + /* + * If @kobj has ns_ops, its children need to be filtered based on + * their namespace tags. Enable namespace support on @kobj->sd. + */ + ops = kobj_child_ns_ops(kobj); + if (ops) { + BUG_ON(ops->type <= KOBJ_NS_TYPE_NONE); + BUG_ON(ops->type >= KOBJ_NS_TYPES); + BUG_ON(!kobj_ns_type_registered(ops->type)); + + kernfs_enable_ns(kobj->sd); + } + + return 0; } static int get_kobj_path_length(struct kobject *kobj) @@ -247,8 +265,10 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, return 0; kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs); - if (!kobj->name) + if (!kobj->name) { + kobj->name = old_name; return -ENOMEM; + } /* ewww... some of these buggers have '/' in the name ... */ while ((s = strchr(kobj->name, '/'))) @@ -536,7 +556,7 @@ out: */ void kobject_del(struct kobject *kobj) { - struct sysfs_dirent *sd; + struct kernfs_node *sd; if (!kobj) return; @@ -625,10 +645,12 @@ static void kobject_release(struct kref *kref) { struct kobject *kobj = container_of(kref, struct kobject, kref); #ifdef CONFIG_DEBUG_KOBJECT_RELEASE - pr_info("kobject: '%s' (%p): %s, parent %p (delayed)\n", - kobject_name(kobj), kobj, __func__, kobj->parent); + unsigned long delay = HZ + HZ * (get_random_int() & 0x3); + pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld)\n", + kobject_name(kobj), kobj, __func__, kobj->parent, delay); INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); - schedule_delayed_work(&kobj->release, HZ); + + schedule_delayed_work(&kobj->release, delay); #else kobject_cleanup(kobj); #endif @@ -835,6 +857,7 @@ void kset_unregister(struct kset *k) { if (!k) return; + kobject_del(&k->kobj); kobject_put(&k->kobj); } |