systemd/0802-ratelimit-add-ratelimit_left-helper.patch

From 90c92458355a64d96f3167bcb510f690446bd76a Mon Sep 17 00:00:00 2001
From: Luca Boccassi <bluca@debian.org>
Date: Fri, 28 Apr 2023 13:10:23 +0100
Subject: [PATCH] ratelimit: add ratelimit_left helper

(cherry picked from commit 53d6987f9e46927bbc9ad683c091c070ebe06658)

Resolves: RHEL-35703
---
 src/basic/ratelimit.c | 17 +++++++++++++++++
 src/basic/ratelimit.h |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/src/basic/ratelimit.c b/src/basic/ratelimit.c
index c16c8f7103..134ed7c2d8 100644
--- a/src/basic/ratelimit.c
+++ b/src/basic/ratelimit.c
@@ -43,3 +43,20 @@ unsigned ratelimit_num_dropped(RateLimit *r) {
 
         return r->num > r->burst ? r->num - r->burst : 0;
 }
+
+usec_t ratelimit_end(const RateLimit *rl) {
+        assert(rl);
+        if (rl->begin == 0)
+                return 0;
+
+        return usec_add(rl->begin, rl->interval);
+}
+
+usec_t ratelimit_left(const RateLimit *rl) {
+        assert(rl);
+
+        if (rl->begin == 0)
+                return 0;
+
+        return usec_sub_unsigned(ratelimit_end(rl), now(CLOCK_MONOTONIC));
+}
diff --git a/src/basic/ratelimit.h b/src/basic/ratelimit.h
index 2236189851..bb7160a895 100644
--- a/src/basic/ratelimit.h
+++ b/src/basic/ratelimit.h
@@ -23,3 +23,6 @@ static inline bool ratelimit_configured(RateLimit *rl) {
 bool ratelimit_below(RateLimit *r);
 
 unsigned ratelimit_num_dropped(RateLimit *r);
+
+usec_t ratelimit_end(const RateLimit *rl);
+usec_t ratelimit_left(const RateLimit *rl);