Move wrapper/ringbuffer to include/ringbuffer

[lttng-modules.git] / lib / ringbuffer / frontend_types.h

diff --git a/lib/ringbuffer/frontend_types.h b/lib/ringbuffer/frontend_types.h
index 837a926ff2ebe54211486873f2db77193103505f..75e602f4ac237c38667c2a1ae941099087e12008 100644 (file)
--- a/lib/ringbuffer/frontend_types.h
+++ b/lib/ringbuffer/frontend_types.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
  *
  * lib/ringbuffer/frontend_types.h
  *
@@ -13,8 +13,8 @@
 #define _LIB_RING_BUFFER_FRONTEND_TYPES_H
 
 #include <linux/kref.h>
-#include <wrapper/ringbuffer/config.h>
-#include <wrapper/ringbuffer/backend_types.h>
+#include <include/ringbuffer/config.h>
+#include <include/ringbuffer/backend_types.h>
 #include <lib/prio_heap/lttng_prio_heap.h>     /* For per-CPU read-side iterator */
 #include <lttng-cpuhotplug.h>
 
@@ -53,16 +53,9 @@ struct channel {
 
        unsigned long switch_timer_interval;    /* Buffer flush (jiffies) */
        unsigned long read_timer_interval;      /* Reader wakeup (jiffies) */
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
        struct lttng_cpuhp_node cpuhp_prepare;
        struct lttng_cpuhp_node cpuhp_online;
        struct lttng_cpuhp_node cpuhp_iter_online;
-#else
-       struct notifier_block cpu_hp_notifier;  /* CPU hotplug notifier */
-       struct notifier_block hp_iter_notifier; /* hotplug iterator notifier */
-       unsigned int cpu_hp_enable:1;           /* Enable CPU hotplug notif. */
-       unsigned int hp_iter_enable:1;          /* Enable hp iter notif. */
-#endif
        struct notifier_block tick_nohz_notifier; /* CPU nohz notifier */
        wait_queue_head_t read_wait;            /* reader wait queue */
        wait_queue_head_t hp_wait;              /* CPU hotplug wait queue */
@@ -120,6 +113,20 @@ struct lib_ring_buffer {
 
        struct commit_counters_cold *commit_cold;
                                        /* Commit count per sub-buffer */
+       u64 *ts_end;                    /*
+                                        * timestamp_end per sub-buffer.
+                                        * Time is sampled by the
+                                        * switch_*_end() callbacks which
+                                        * are the last space reservation
+                                        * performed in the sub-buffer
+                                        * before it can be fully
+                                        * committed and delivered. This
+                                        * time value is then read by
+                                        * the deliver callback,
+                                        * performed by the last commit
+                                        * before the buffer becomes
+                                        * readable.
+                                        */
        atomic_long_t active_readers;   /*
                                         * Active readers count
                                         * standard atomic access (shared)