[PATCH v2 05/20] kernel-shark: Add stream_id to kshark_entry

["Yordan Karadzhov (VMware)" <y.karadz@gmail.com>]

kshark_entry contains all information from one trace record, needed
in order to visualize the time-series of trace records. Here we
reorganize data fields to kshark_entry in order to make room for
the unique identifier of the Data stream this entry belongs to.

Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
---
 src/libkshark.c |  2 +-
 src/libkshark.h | 12 +++++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/libkshark.c b/src/libkshark.c
index 52aacd30..92e2450c 100644
--- a/src/libkshark.c
+++ b/src/libkshark.c
@@ -489,7 +489,7 @@ static inline void unset_event_filter_flag(struct kshark_context *kshark_ctx,
 	e->visible &= ~event_mask;
 }
 
-static void set_all_visible(uint16_t *v) {
+static void set_all_visible(uint8_t *v) {
 	/*  Keep the original value of the PLUGIN_UNTOUCHED bit flag. */
 	*v |= 0xFF & ~KS_PLUGIN_UNTOUCHED_MASK;
 }
diff --git a/src/libkshark.h b/src/libkshark.h
index 1165c512..fe0ba7f2 100644
--- a/src/libkshark.h
+++ b/src/libkshark.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1 */
 
 /*
- * Copyright (C) 2017 VMware Inc, Yordan Karadzhov <y.karadz@gmail.com>
+ * Copyright (C) 2017 VMware Inc, Yordan Karadzhov (VMware) <y.karadz@gmail.com>
  */
 
  /**
@@ -49,7 +49,10 @@ struct kshark_entry {
 	 * kshark_filter_masks to check the level of visibility/invisibility
 	 * of the entry.
 	 */
-	uint16_t	visible;
+	uint8_t		visible;
+
+	/** Data stream identifier. */
+	int8_t		stream_id;
 
 	/** The CPU core of the record. */
 	int16_t		cpu;
@@ -57,7 +60,7 @@ struct kshark_entry {
 	/** The PID of the task the record was generated. */
 	int32_t		pid;
 
-	/** Unique Id ot the trace event type. */
+	/** Unique Id of the trace event type. */
 	int32_t		event_id;
 
 	/** The offset into the trace file, used to find the record. */
@@ -319,6 +322,9 @@ struct kshark_data_stream {
 	struct kshark_data_stream_interface	interface;
 };
 
+/** Hard-coded maximum number of data stream. */
+#define KS_MAX_NUM_STREAMS	127
+
 /** Size of the task's hash table. */
 #define KS_TASK_HASH_SHIFT 16
 #define KS_TASK_HASH_SIZE (1 << KS_TASK_HASH_SHIFT)
-- 
2.25.1