log: add error_ret()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/log.h b/src/lxc/log.h
index e90dadef7dbd23f12c97167e41c32291fc27fcc2..8ee5f9862322528173216183d17c4c16fcbe9d35 100644 (file)
--- a/src/lxc/log.h
+++ b/src/lxc/log.h
@@ -583,6 +583,13 @@ __lxc_unused static inline void LXC_##LEVEL(struct lxc_log_locinfo* locinfo,       \
                __internal_ret__;                             \
        })
 
+#define error_ret(__ret__, format, ...)                       \
+       ({                                                    \
+               typeof(__ret__) __internal_ret__ = (__ret__); \
+               ERROR(format, ##__VA_ARGS__);                 \
+               __internal_ret__;                             \
+       })
+
 #define syswarn(format, ...)                    \
        ({                                      \
                SYSWARN(format, ##__VA_ARGS__); \