RDMA/core: Introduce ratelimited ibdev printk functions

Add ratelimited helpers to the ibdev_* printk functions.
Implementation inspired by counterpart dev_*_ratelimited functions.

Signed-off-by: Gal Pressman <galpress@amazon.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190801171447.54440-2-galpress@amazon.com
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 2a1523ccd7abf43f3f1d63dea75786a0a83e4a35..0ecda7d15df222878793b491eb76d992dbe81c51 100644 (file)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -107,6 +107,48 @@ static inline
 void ibdev_dbg(const struct ib_device *ibdev, const char *format, ...) {}
 #endif
 
+#define ibdev_level_ratelimited(ibdev_level, ibdev, fmt, ...)           \
+do {                                                                    \
+       static DEFINE_RATELIMIT_STATE(_rs,                              \
+                                     DEFAULT_RATELIMIT_INTERVAL,       \
+                                     DEFAULT_RATELIMIT_BURST);         \
+       if (__ratelimit(&_rs))                                          \
+               ibdev_level(ibdev, fmt, ##__VA_ARGS__);                 \
+} while (0)
+
+#define ibdev_emerg_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_emerg, ibdev, fmt, ##__VA_ARGS__)
+#define ibdev_alert_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_alert, ibdev, fmt, ##__VA_ARGS__)
+#define ibdev_crit_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_crit, ibdev, fmt, ##__VA_ARGS__)
+#define ibdev_err_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_err, ibdev, fmt, ##__VA_ARGS__)
+#define ibdev_warn_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_warn, ibdev, fmt, ##__VA_ARGS__)
+#define ibdev_notice_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_notice, ibdev, fmt, ##__VA_ARGS__)
+#define ibdev_info_ratelimited(ibdev, fmt, ...) \
+       ibdev_level_ratelimited(ibdev_info, ibdev, fmt, ##__VA_ARGS__)
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+/* descriptor check is first to prevent flooding with "callbacks suppressed" */
+#define ibdev_dbg_ratelimited(ibdev, fmt, ...)                          \
+do {                                                                    \
+       static DEFINE_RATELIMIT_STATE(_rs,                              \
+                                     DEFAULT_RATELIMIT_INTERVAL,       \
+                                     DEFAULT_RATELIMIT_BURST);         \
+       DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
+       if (DYNAMIC_DEBUG_BRANCH(descriptor) && __ratelimit(&_rs))      \
+               __dynamic_ibdev_dbg(&descriptor, ibdev, fmt,            \
+                                   ##__VA_ARGS__);                     \
+} while (0)
+#else
+__printf(2, 3) __cold
+static inline
+void ibdev_dbg_ratelimited(const struct ib_device *ibdev, const char *format, ...) {}
+#endif
+
 union ib_gid {
        u8      raw[16];
        struct {