Blame SOURCES/use-sendfile.patch

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From acda1b0d97fa9e2a3ea3a51619d30d7f2d0f7244 Mon Sep 17 00:00:00 2001
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From: Christian Kellner <christian@kellner.me>
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Date: Tue, 26 Mar 2019 17:52:28 +0100
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Subject: [PATCH] common: use sendfile instead of copy_file_range
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On older kernels we cannot use copy_file_range so use sendfile
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instead.
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---
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 common/bolt-io.c | 3 ++-
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 1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/common/bolt-io.c b/common/bolt-io.c
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index 5e50afa..375f978 100644
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--- a/common/bolt-io.c
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+++ b/common/bolt-io.c
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@@ -26,6 +26,7 @@
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 #include <fcntl.h>
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 #include <errno.h>
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 #include <sys/types.h>
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+#include <sys/sendfile.h>
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 #include <sys/stat.h>
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 #include <stdio.h>
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 #include <string.h>
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@@ -831,7 +832,7 @@ bolt_copy_bytes (int      fd_from,
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     {
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       ssize_t r;
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-      r = copy_file_range (fd_from, NULL, fd_to, NULL, len, 0);
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+      r = sendfile (fd_to, fd_from, NULL, len);
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       if (r == -1)
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         {
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-- 
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2.20.1
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