From 930b65f26cb39687a113641f56711a2d58f886ca Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Wed, 4 Mar 2020 17:49:50 +0100
Subject: [SERVER] Add timer task for saving cache maps

Cache maps will now be saved periodically, but only if either they have
a "dirty" bit set, which happens if any bits in the map get cleared
again (due to corruption), or if new data has been replicated from an
uplink server. This either means at least one byte received and 5
minutes have passed, or at least 500MB have been downloaded. The timer
currently runs every 20 seconds.
---
 src/server/image.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/server/image.h')

diff --git a/src/server/image.h b/src/server/image.h
index 89791fc..4614c74 100644
--- a/src/server/image.h
+++ b/src/server/image.h
@@ -49,6 +49,8 @@ void image_closeUnusedFd();
 
 bool image_ensureDiskSpaceLocked(uint64_t size, bool force);
 
+bool image_saveCacheMap(dnbd3_image_t *image);
+
 // one byte in the map covers 8 4kib blocks, so 32kib per byte
 // "+ (1 << 15) - 1" is required to account for the last bit of
 // the image that is smaller than 32kib
-- 
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