[PATCH v3 01/18] progress: add close_progress() to display some statistics

[Enrico Scholz <enrico.scholz@xxxxxxxxxxxxxxxxx>]

With a later patch, this will produce output like

| :/ cp -v /mnt/tftp/tmp /tmp/
|         [########...#########] 29138411 bytes, 127413 bytes/s

Signed-off-by: Enrico Scholz <enrico.scholz@xxxxxxxxxxxxxxxxx>
---
 include/progress.h  |  1 +
 lib/show_progress.c | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/include/progress.h b/include/progress.h
index 7230bd3a9bd5..219d772201bf 100644
--- a/include/progress.h
+++ b/include/progress.h
@@ -16,6 +16,7 @@ void init_progression_bar(loff_t max);
  * spinner is printed.
  */
 void show_progress(loff_t now);
+void close_progress(loff_t total);
 
 extern struct notifier_head progress_notifier;
 
diff --git a/lib/show_progress.c b/lib/show_progress.c
index 1b624bcb9af8..5b42a2d74b8f 100644
--- a/lib/show_progress.c
+++ b/lib/show_progress.c
@@ -24,6 +24,7 @@
 static loff_t printed;
 static loff_t progress_max;
 static unsigned spin;
+static uint64_t start_tm;
 
 void show_progress(loff_t now)
 {
@@ -47,11 +48,35 @@ void show_progress(loff_t now)
 	}
 }
 
+void close_progress(loff_t total)
+{
+	uint64_t now = get_time_ns();
+	unsigned long speed;
+	unsigned long delta;
+
+	if (now <= start_tm) {
+		pr_crit("tm mismatch");
+		return;
+	}
+
+	if (total < 0)
+		return;
+
+	/* convert to ms and add '1' to avoid div-by-zero */
+	delta = div_u64(now - start_tm, 1000000) + 1;
+
+	/* speed is bytes/s */
+	speed = div_u64(total * 1000, delta);
+
+	printf("] %llu bytes, %lu bytes/s", (unsigned long long)total, speed);
+}
+
 void init_progression_bar(loff_t max)
 {
 	printed = 0;
 	progress_max = max;
 	spin = 0;
+	start_tm = get_time_ns();
 	if (progress_max && progress_max != FILESIZE_MAX)
 		printf("\t[%*s]\r\t[", HASHES_PER_LINE, "");
 	else
-- 
2.37.1