docker/0003-BUILD-SLE12-revert-graphdriver-btrfs-use-kernel-UAPI.patch

From 16b520570514380a706fc13363b5e5c64f9fa4e7 Mon Sep 17 00:00:00 2001
From: Aleksa Sarai <asarai@suse.de>
Date: Mon, 22 May 2023 15:44:54 +1000
Subject: [PATCH 3/4] BUILD: SLE12: revert "graphdriver/btrfs: use kernel UAPI
 headers"

This reverts commit 3208dcabdc8997340b255f5b880fef4e3f54580d.

On SLE 12, our UAPI headers are too old, resulting in us being unable to
build the btrfs driver with the new headers. This patch is only needed
for SLE-12.

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
---
 daemon/graphdriver/btrfs/btrfs.go | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/daemon/graphdriver/btrfs/btrfs.go b/daemon/graphdriver/btrfs/btrfs.go
index d88efc4be2bb..4e976aa689cd 100644
--- a/daemon/graphdriver/btrfs/btrfs.go
+++ b/daemon/graphdriver/btrfs/btrfs.go
@@ -5,17 +5,12 @@ package btrfs // import "github.com/docker/docker/daemon/graphdriver/btrfs"
 
 /*
 #include <stdlib.h>
-#include <stdio.h>
 #include <dirent.h>
 
-#include <linux/version.h>
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,12,0)
-    #error "Headers from kernel >= 4.12 are required to build with Btrfs support."
-    #error "HINT: Set 'DOCKER_BUILDTAGS=exclude_graphdriver_btrfs' to build without Btrfs."
-#endif
-
-#include <linux/btrfs.h>
-#include <linux/btrfs_tree.h>
+// keep struct field name compatible with btrfs-progs < 6.1.
+#define max_referenced max_rfer
+#include <btrfs/ioctl.h>
+#include <btrfs/ctree.h>
 
 static void set_name_btrfs_ioctl_vol_args_v2(struct btrfs_ioctl_vol_args_v2* btrfs_struct, const char* value) {
     snprintf(btrfs_struct->name, BTRFS_SUBVOL_NAME_MAX, "%s", value);
-- 
2.40.1