From 707896531bd8bd88d72855fc60e3c51b99cd0e46 Mon Sep 17 00:00:00 2001
From: Gabriel2392 <gabriel824m@gmail.com>
Date: Sun, 9 Jun 2024 19:53:27 -0300
Subject: [PATCH] a53x: Get, fix, build and load zfs as module

---
 aarch64-zfs.patch                    | 27 +++++++++++++++++++++++++++
 arch/arm64/configs/a53x_defconfig    |  1 +
 kernel_build/build.sh                | 24 ++++++++++++++++++++++++
 kernel_build/vboot_dlkm/modules.load |  2 ++
 4 files changed, 54 insertions(+)
 create mode 100644 aarch64-zfs.patch

diff --git a/aarch64-zfs.patch b/aarch64-zfs.patch
new file mode 100644
index 000000000..c77302855
--- /dev/null
+++ b/aarch64-zfs.patch
@@ -0,0 +1,27 @@
+From 91ffd323bb1a12bf5ca312f2bf25ed800f9a9ecb Mon Sep 17 00:00:00 2001
+From: Gabriel2392 <gabriel824m@gmail.com>
+Date: Sun, 9 Jun 2024 21:06:52 -0300
+Subject: [PATCH] aarch64: fix zfs build
+
+---
+ include/zfs/os/linux/kernel/linux/simd_aarch64.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/include/zfs/os/linux/kernel/linux/simd_aarch64.h b/include/zfs/os/linux/kernel/linux/simd_aarch64.h
+index 123a0c72b..4e305b516 100644
+--- a/include/zfs/os/linux/kernel/linux/simd_aarch64.h
++++ b/include/zfs/os/linux/kernel/linux/simd_aarch64.h
+@@ -83,11 +83,11 @@
+ #define	kfpu_init()		(0)
+ #define	kfpu_fini()		do {} while (0)
+ 
+-#define	get_ftr(id) {				\
++#define	get_ftr(id) ({				\
+ 	unsigned long __val;			\
+ 	asm("mrs %0, "#id : "=r" (__val));	\
+ 	__val;					\
+-}
++})
+ 
+ /*
+  * Check if NEON is available
diff --git a/arch/arm64/configs/a53x_defconfig b/arch/arm64/configs/a53x_defconfig
index 5558c3c41..0380366ea 100755
--- a/arch/arm64/configs/a53x_defconfig
+++ b/arch/arm64/configs/a53x_defconfig
@@ -7354,6 +7354,7 @@ CONFIG_XFS_RT=y
 CONFIG_BTRFS_FS=y
 CONFIG_BTRFS_FS_POSIX_ACL=y
 # CONFIG_NILFS2_FS is not set
+CONFIG_ZFS=m
 CONFIG_F2FS_FS=y
 CONFIG_F2FS_STAT_FS=y
 CONFIG_F2FS_FS_XATTR=y
diff --git a/kernel_build/build.sh b/kernel_build/build.sh
index 0d50c36e9..527b9b0d0 100755
--- a/kernel_build/build.sh
+++ b/kernel_build/build.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 XY_VERSION="R3.1"
+ZFS_VERSION="zfs-2.2.4"
 
 set -e
 
@@ -44,6 +45,24 @@ OUT_DTBIMAGE="$TMPDIR/dtb.img"
 # Kernel-side
 BUILD_ARGS="LOCALVERSION=-XyUnbound-${XY_VERSION} KBUILD_BUILD_USER=Gabriel260BR KBUILD_BUILD_HOST=ExynosUnbound"
 
+bring_zfs() {
+  echo "Adding ZFS Support to ktree..."
+  git clone https://github.com/openzfs/zfs -b "$ZFS_VERSION" --depth=1 || exit
+  CDIR="$(pwd)"
+  cd "$CDIR/zfs"
+  ./autogen.sh
+  PATH="$SIMPLE_PATH" ./configure --host=aarch64-unknown-linux --enable-linux-builtin=yes --with-linux="$CDIR" --with-linux-obj="$CDIR/out" CC=clang --with-config=kernel --without-udevdir --disable-sysvinit --disable-systemd || exit
+  ./copy-builtin "$CDIR" || exit
+  cd "$CDIR"
+  git apply aarch64-zfs.patch || true
+  echo 'MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);' >> fs/zfs/os/linux/zfs/zfs_ioctl_os.c
+  echo 'MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);' >> fs/zfs/os/linux/spl/spl-generic.c
+  grep -r CDDL include/zfs/|grep -v '\*'|grep -v bsd|cut -d':' -f1|while read FL ; do sed -i 's|ZFS_META_LICENSE = CDDL|ZFS_META_LICENSE = GPL|; s|#define ZFS_META_LICENSE "CDDL"|#define ZFS_META_LICENSE "GPL"|' $FL; done
+  echo "$(grep CONFIG_ZFS arch/arm64/configs/a33x_defconfig)" >> "$CDIR/out/.config" "$CDIR/out/.config.old"
+  echo ' - OK'
+}
+
+
 kfinish() {
     rm -rf "$TMPDIR"
     rm -rf "$OUTDIR"
@@ -60,6 +79,7 @@ export CC="$PARENT_DIR/clang-r416183b/bin/clang"
 
 export PLATFORM_VERSION=12
 export ANDROID_MAJOR_VERSION=s
+export SIMPLE_PATH="$PARENT_DIR/clang-r416183b/bin:$PATH"
 export PATH="$PARENT_DIR/build-tools/path/linux-x86:$PARENT_DIR/clang-r416183b/bin:$PATH"
 export TARGET_SOC=s5e8825
 export LLVM=1 LLVM_IAS=1
@@ -74,6 +94,10 @@ if [ ! -d "$PARENT_DIR/build-tools" ]; then
 fi
 
 make -j$(nproc --all) -C $(pwd) O=out $BUILD_ARGS a53x_defconfig >/dev/null
+make -j$(nproc --all) -C $(pwd) O=out $BUILD_ARGS modules_prepare >/dev/null
+if [ ! -d "$(pwd)/zfs" ]; then
+  bring_zfs
+fi
 make -j$(nproc --all) -C $(pwd) O=out $BUILD_ARGS dtbs >/dev/null
 make -j$(nproc --all) -C $(pwd) O=out $BUILD_ARGS >/dev/null
 make -j$(nproc --all) -C $(pwd) O=out INSTALL_MOD_STRIP="--strip-debug --keep-section=.ARM.attributes" INSTALL_MOD_PATH="$MODULES_OUTDIR" modules_install >/dev/null
diff --git a/kernel_build/vboot_dlkm/modules.load b/kernel_build/vboot_dlkm/modules.load
index b29e66833..59b332aed 100644
--- a/kernel_build/vboot_dlkm/modules.load
+++ b/kernel_build/vboot_dlkm/modules.load
@@ -295,4 +295,6 @@ mt76-connac-lib.ko
 mt76-usb.ko
 mt7921-common.ko
 mt7921u.ko
+spl.ko
+zfs.ko
 input_booster_lkm.ko