!2 init: add source tar, spec, patch.

From: @heppen 
Reviewed-by: @liheavy 
Signed-off-by: @liheavy

0001-add-makefile-used-on-openeuler.patch

@@ -0,0 +1,70 @@
+From b4d9c6ec4b948c8e3bc0113699b8914f84531215 Mon Sep 17 00:00:00 2001
+From: heppen <hepeng68@huawei.com>
+Date: Tue, 16 May 2023 11:49:24 +0800
+Subject: [PATCH 1/2] add makefile used on openeuler, the new makefile could make hmdfs as a kernel object.
+
+---
+ Kbuild   | 17 +++++++++++++++++
+ Makefile | 25 +++++++++++++------------
+ 2 files changed, 30 insertions(+), 12 deletions(-)
+ create mode 100644 Kbuild
+
+diff --git a/Kbuild b/Kbuild
+new file mode 100644
+index 000000000000..cbb7852cb090
+--- /dev/null
++++ b/Kbuild
+@@ -0,0 +1,17 @@
++obj-$(CONFIG_HMDFS_FS) += hmdfs.o
++ccflags-y += -I$(src) -Werror -Wall
++ccflags-$(CONFIG_HMDFS_FS_ENCRYPTION) += -DCONFIG_HMDFS_FS_ENCRYPTION
++ccflags-$(CONFIG_HMDFS_FS_PERMISSION) += -DCONFIG_HMDFS_FS_PERMISSION
++
++hmdfs-y := main.o super.o inode.o dentry.o inode_root.o file_merge.o
++hmdfs-y += hmdfs_client.o hmdfs_server.o inode_local.o inode_remote.o
++hmdfs-y += inode_merge.o hmdfs_dentryfile.o file_root.o file_remote.o
++hmdfs-y += file_local.o client_writeback.o server_writeback.o stash.o
++hmdfs-y += hmdfs_share.o
++
++hmdfs-y += comm/device_node.o comm/message_verify.o comm/node_cb.o
++hmdfs-y += comm/connection.o comm/socket_adapter.o comm/transport.o
++
++hmdfs-$(CONFIG_HMDFS_FS_ENCRYPTION) += comm/crypto.o
++hmdfs-$(CONFIG_HMDFS_FS_PERMISSION) += authority/authentication.o
++hmdfs-$(CONFIG_HMDFS_FS_PERMISSION) += authority/config.o
+diff --git a/Makefile b/Makefile
+index 20896e71636a..689db2b9db1e 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,15 +1,16 @@
+-obj-$(CONFIG_HMDFS_FS) += hmdfs.o
+-ccflags-y += -I$(src)
++ifneq ($(KERNELRELEASE),)
++include Kbuild
+ 
+-hmdfs-y := main.o super.o inode.o dentry.o inode_root.o file_merge.o
+-hmdfs-y += hmdfs_client.o hmdfs_server.o inode_local.o inode_remote.o
+-hmdfs-y += inode_merge.o hmdfs_dentryfile.o file_root.o file_remote.o
+-hmdfs-y += file_local.o client_writeback.o server_writeback.o stash.o
+-hmdfs-y += hmdfs_share.o
++else
++KERNELDIR := /lib/modules/$(shell rpm -aq kernel-devel | cut -d "-" -f 3,4)/build
++$(info KERNELDIR=$(KERNELDIR))
+ 
+-hmdfs-y += comm/device_node.o comm/message_verify.o comm/node_cb.o
+-hmdfs-y += comm/connection.o comm/socket_adapter.o comm/transport.o
++export CONFIG_HMDFS_FS := m
++export CONFIG_HMDFS_FS_ENCRYPTION := y
++export CONFIG_HMDFS_FS_PERMISSION := y
+ 
+-hmdfs-$(CONFIG_HMDFS_FS_ENCRYPTION) += comm/crypto.o
+-hmdfs-$(CONFIG_HMDFS_FS_PERMISSION) += authority/authentication.o
+-hmdfs-$(CONFIG_HMDFS_FS_PERMISSION) += authority/config.o
++all:
++	$(MAKE) -C $(KERNELDIR) M=$$PWD modules
++clean:
++	$(MAKE) -C $(KERNELDIR) M=$$PWD clean
++endif
+-- 
+2.33.0
+

0002-bugfix-null-pointer-in-memcpy.patch

@@ -0,0 +1,41 @@
+From 0aafe4b0ede1478879e188693165b24a8ae533c4 Mon Sep 17 00:00:00 2001
+From: heppen <hepeng68@huawei.com>
+Date: Tue, 16 May 2023 11:50:59 +0800
+Subject: [PATCH 2/2] remove inline keyword for build, bugfix: null pointer in memcpy.
+
+---
+ hmdfs_client.c | 3 ++-
+ hmdfs_share.h  | 2 +-
+ 2 files changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/hmdfs_client.c b/hmdfs_client.c
+index 31c1a6d38e8f..357365b15fe5 100644
+--- a/hmdfs_client.c
++++ b/hmdfs_client.c
+@@ -901,8 +901,9 @@ int hmdfs_send_setxattr(struct hmdfs_peer *con, const char *send_buf,
+ 	strncpy(req->buf, send_buf, path_len);
+ 	strncpy(req->buf + path_len + 1, name, name_len);
+ 	if (!value) {
+-		memcpy(req->buf + path_len + name_len + 2, value, size);
+ 		req->del = true;
++	} else {
++		memcpy(req->buf + path_len + name_len + 2, value, size);
+ 	}
+ 	ret = hmdfs_sendmessage_request(con, &sm);
+ 	kfree(req);
+diff --git a/hmdfs_share.h b/hmdfs_share.h
+index 3c055805bd6d..389e26c97c3c 100644
+--- a/hmdfs_share.h
++++ b/hmdfs_share.h
+@@ -49,7 +49,7 @@ int insert_share_item(struct hmdfs_share_table *st, struct qstr *relative_path,
+ void update_share_item(struct hmdfs_share_item *item, struct file *file,
+ 			char *cid);
+ bool in_share_dir(struct dentry *child_dentry);
+-inline bool is_share_dir(struct inode *inode, const char *name);
++bool is_share_dir(struct inode *inode, const char *name);
+ int get_path_from_share_table(struct hmdfs_sb_info *sbi,
+ 			        struct dentry *cur_dentry, struct path *src_path);
+ 
+-- 
+2.33.0
+

hmdfs.spec

@@ -0,0 +1,41 @@
+%define hmdfs_dest_path /usr/lib/modules/%(rpm -aq kernel-devel | cut -d "-" -f 3,4)/hmdfs
+
+Name:           hmdfs
+Version:        1.0.0
+Release:        1%{?dist}
+Summary:        HMDFS is an overlay file system.
+
+License:        Apache License 2.0
+URL:            https://gitee.com/openharmony/kernel_linux_5.10/tree/OpenHarmony-3.2-Release/fs/hmdfs
+Source0:        https://gitee.com/src-openeuler/hmdfs/%{name}-%{version}.tar.gz
+Patch0:         0001-add-makefile-used-on-openeuler.patch
+Patch1:         0002-bugfix-null-pointer-in-memcpy.patch
+
+BuildRequires:  gcc, make, kernel-devel
+
+%description
+HMDFS is an overlay file system. Relying on the underlying file system, under the premise of networking, file exchanges across devices can be realized.
+
+# Decompress source code package, make patches to the source code.
+%prep
+%setup -c
+%patch0 -p1
+%patch1 -p1
+
+# make.
+%build
+make %{?_smp_mflags}
+
+# install hmdfs's ko file to a certain path.
+%install
+install -d $RPM_BUILD_ROOT/%{hmdfs_dest_path}/
+install -v %{name}.ko $RPM_BUILD_ROOT/%{hmdfs_dest_path}/
+
+# copy ko file to the certain path on deployment environment.
+%files
+/%{hmdfs_dest_path}/*.ko
+
+
+%changelog
+* Thu Apr 27 2023 hepeng <hepeng68@huawei.com> - 1.0.0-1
+- Package init