diff options
Diffstat (limited to 'include/linux/ns_common.h')
| -rw-r--r-- | include/linux/ns_common.h | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h index 5b8f2f0163d7..dfb6b798ba82 100644 --- a/include/linux/ns_common.h +++ b/include/linux/ns_common.h @@ -60,10 +60,17 @@ static __always_inline __must_check int __ns_ref_active_read(const struct ns_com return atomic_read(&ns->__ns_ref_active); } +static __always_inline __must_check int __ns_ref_read(const struct ns_common *ns) +{ + return refcount_read(&ns->__ns_ref); +} + static __always_inline __must_check bool __ns_ref_put(struct ns_common *ns) { - if (is_ns_init_id(ns)) + if (is_ns_init_id(ns)) { + VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1); return false; + } if (refcount_dec_and_test(&ns->__ns_ref)) { VFS_WARN_ON_ONCE(__ns_ref_active_read(ns)); return true; @@ -73,31 +80,32 @@ static __always_inline __must_check bool __ns_ref_put(struct ns_common *ns) static __always_inline __must_check bool __ns_ref_get(struct ns_common *ns) { - if (is_ns_init_id(ns)) + if (is_ns_init_id(ns)) { + VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1); return true; + } if (refcount_inc_not_zero(&ns->__ns_ref)) return true; VFS_WARN_ON_ONCE(__ns_ref_active_read(ns)); return false; } -static __always_inline __must_check int __ns_ref_read(const struct ns_common *ns) -{ - return refcount_read(&ns->__ns_ref); -} - static __always_inline void __ns_ref_inc(struct ns_common *ns) { - if (is_ns_init_id(ns)) + if (is_ns_init_id(ns)) { + VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1); return; + } refcount_inc(&ns->__ns_ref); } static __always_inline __must_check bool __ns_ref_dec_and_lock(struct ns_common *ns, spinlock_t *ns_lock) { - if (is_ns_init_id(ns)) + if (is_ns_init_id(ns)) { + VFS_WARN_ON_ONCE(__ns_ref_read(ns) != 1); return false; + } return refcount_dec_and_lock(&ns->__ns_ref, ns_lock); } |